2005-04-17 05:20:36 +07:00
|
|
|
/*
|
|
|
|
|
* linux/drivers/video/fbcon.c -- Low level frame buffer based console driver
|
|
|
|
|
*
|
|
|
|
|
* Copyright (C) 1995 Geert Uytterhoeven
|
|
|
|
|
*
|
|
|
|
|
*
|
|
|
|
|
* This file is based on the original Amiga console driver (amicon.c):
|
|
|
|
|
*
|
|
|
|
|
* Copyright (C) 1993 Hamish Macdonald
|
|
|
|
|
* Greg Harp
|
|
|
|
|
* Copyright (C) 1994 David Carter [carter@compsci.bristol.ac.uk]
|
|
|
|
|
*
|
|
|
|
|
* with work by William Rucklidge (wjr@cs.cornell.edu)
|
|
|
|
|
* Geert Uytterhoeven
|
|
|
|
|
* Jes Sorensen (jds@kom.auc.dk)
|
|
|
|
|
* Martin Apel
|
|
|
|
|
*
|
|
|
|
|
* and on the original Atari console driver (atacon.c):
|
|
|
|
|
*
|
|
|
|
|
* Copyright (C) 1993 Bjoern Brauel
|
|
|
|
|
* Roman Hodek
|
|
|
|
|
*
|
|
|
|
|
* with work by Guenther Kelleter
|
|
|
|
|
* Martin Schaller
|
|
|
|
|
* Andreas Schwab
|
|
|
|
|
*
|
|
|
|
|
* Hardware cursor support added by Emmanuel Marty (core@ggi-project.org)
|
|
|
|
|
* Smart redraw scrolling, arbitrary font width support, 512char font support
|
|
|
|
|
* and software scrollback added by
|
|
|
|
|
* Jakub Jelinek (jj@ultra.linux.cz)
|
|
|
|
|
*
|
|
|
|
|
* Random hacking by Martin Mares <mj@ucw.cz>
|
|
|
|
|
*
|
|
|
|
|
* 2001 - Documented with DocBook
|
|
|
|
|
* - Brad Douglas <brad@neruo.com>
|
|
|
|
|
*
|
|
|
|
|
* The low level operations for the various display memory organizations are
|
|
|
|
|
* now in separate source files.
|
|
|
|
|
*
|
|
|
|
|
* Currently the following organizations are supported:
|
|
|
|
|
*
|
|
|
|
|
* o afb Amiga bitplanes
|
|
|
|
|
* o cfb{2,4,8,16,24,32} Packed pixels
|
|
|
|
|
* o ilbm Amiga interleaved bitplanes
|
|
|
|
|
* o iplan2p[248] Atari interleaved bitplanes
|
|
|
|
|
* o mfb Monochrome
|
|
|
|
|
* o vga VGA characters/attributes
|
|
|
|
|
*
|
|
|
|
|
* To do:
|
|
|
|
|
*
|
|
|
|
|
* - Implement 16 plane mode (iplan2p16)
|
|
|
|
|
*
|
|
|
|
|
*
|
|
|
|
|
* This file is subject to the terms and conditions of the GNU General Public
|
|
|
|
|
* License. See the file COPYING in the main directory of this archive for
|
|
|
|
|
* more details.
|
|
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
#undef FBCONDEBUG
|
|
|
|
|
|
|
|
|
|
#include <linux/config.h>
|
|
|
|
|
#include <linux/module.h>
|
|
|
|
|
#include <linux/types.h>
|
|
|
|
|
#include <linux/sched.h>
|
|
|
|
|
#include <linux/fs.h>
|
|
|
|
|
#include <linux/kernel.h>
|
|
|
|
|
#include <linux/delay.h> /* MSch: for IRQ probe */
|
|
|
|
|
#include <linux/tty.h>
|
|
|
|
|
#include <linux/console.h>
|
|
|
|
|
#include <linux/string.h>
|
|
|
|
|
#include <linux/kd.h>
|
|
|
|
|
#include <linux/slab.h>
|
|
|
|
|
#include <linux/fb.h>
|
|
|
|
|
#include <linux/vt_kern.h>
|
|
|
|
|
#include <linux/selection.h>
|
|
|
|
|
#include <linux/font.h>
|
|
|
|
|
#include <linux/smp.h>
|
|
|
|
|
#include <linux/init.h>
|
|
|
|
|
#include <linux/interrupt.h>
|
|
|
|
|
#include <linux/crc32.h> /* For counting font checksums */
|
|
|
|
|
#include <asm/irq.h>
|
|
|
|
|
#include <asm/system.h>
|
|
|
|
|
#include <asm/uaccess.h>
|
|
|
|
|
#ifdef CONFIG_ATARI
|
|
|
|
|
#include <asm/atariints.h>
|
|
|
|
|
#endif
|
|
|
|
|
#ifdef CONFIG_MAC
|
|
|
|
|
#include <asm/macints.h>
|
|
|
|
|
#endif
|
|
|
|
|
#if defined(__mc68000__) || defined(CONFIG_APUS)
|
|
|
|
|
#include <asm/machdep.h>
|
|
|
|
|
#include <asm/setup.h>
|
|
|
|
|
#endif
|
|
|
|
|
|
|
|
|
|
#include "fbcon.h"
|
|
|
|
|
|
|
|
|
|
#ifdef FBCONDEBUG
|
|
|
|
|
# define DPRINTK(fmt, args...) printk(KERN_DEBUG "%s: " fmt, __FUNCTION__ , ## args)
|
|
|
|
|
#else
|
|
|
|
|
# define DPRINTK(fmt, args...)
|
|
|
|
|
#endif
|
|
|
|
|
|
|
|
|
|
enum {
|
|
|
|
|
FBCON_LOGO_CANSHOW = -1, /* the logo can be shown */
|
|
|
|
|
FBCON_LOGO_DRAW = -2, /* draw the logo to a console */
|
|
|
|
|
FBCON_LOGO_DONTSHOW = -3 /* do not show the logo */
|
|
|
|
|
};
|
|
|
|
|
|
|
|
|
|
struct display fb_display[MAX_NR_CONSOLES];
|
[PATCH] fbcon: Console Rotation - Prepare fbcon for console rotation
This patch series implements generic code to rotate the console at 90, 180,
and 270 degrees. The implementation is completely done in the framebuffer
console level, thus no changes to the framebuffer layer or to the drivers
are needed.
Console rotation is required by some Sharp-based devices where the natural
orientation of the display is not at 0 degrees. Also, users that have
displays that can pivot will benefit by having a console in portrait mode
if they so desire.
The choice to implement the code in the console layer rather than in the
framebuffer layer is due to the following reasons:
- it's fast
- it does not require driver changes
- it can coexist with devices that can rotate the display at the hardware level
- it complements graphics applications that can do display rotation
The changes to core fbcon are minimal-- recognition of the console
rotation angle so it can swap directions, origins and axes (xres vs yres,
xpanstep vs ypanstep, xoffset vs yoffset, etc) and storage of the rotation
angle per display. The bulk of the code that does the actual drawing to the
screen are placed in separate files. Each angle of rotation has separate
methods (bmove, clear, putcs, cursor, update_start which is derived from
update_var, and clear_margins). To mimimize processing time, the fontdata
are pre-rotated at each console switch (only if the font or the angle has
changed).
The option can be compiled out (CONFIG_FRAMEBUFFER_CONSOLE_ROTATION = n) if
rotation is not needed.
Choosing the rotation angle can be done in several ways:
1. boot option fbcon=rotate:n, where
n = 0 - normal
n = 1 - 90 degrees (clockwise)
n = 2 - 180 degrees (upside down)
n = 3 - 270 degrees (counterclockwise)
2. echo n > /sys/class/graphics/fb[num]/con_rotate
where n is the same as described above. It sets the angle of rotation
of the current console
3 echo n > /sys/class/graphics/fb[num]/con_rotate_all
where n is the same as described above. Globally sets the angle of
rotation.
GOTCHAS:
The option, especially at angles of 90 and 270 degrees, will exercise
the least used code of drivers. Namely, at these angles, panning is done
in the x-axis, so it can reveal bugs in the driver if xpanstep is set
incorrectly. A workaround is to set xpanstep = 0.
Secondly, at these angles, the framebuffer memory access can be
unaligned if (fontheight * bpp) % 32 ~= 0 which can reveal bugs in the drivers
imageblit, fillrect and copyarea functions. (I think cfbfillrect may have
this buglet). A workaround is to use a standard 8x16 font.
Speed:
The scrolling speed difference between 0 and 180 degrees is minimal,
somewhere areound 1-2%. At 90 or 270 degress, speed drops down to a vicinity
of 30-40%. This is understandable because the blit direction is across the
framebuffer "direction." Scrolling will be helped at these angles if xpanstep
is not equal to zero, use of 8x16 fonts, and setting xres_virtual >= xres * 2.
Note: The code is tested on little-endian only, so I don't know if it will
work in big-endian. Please let me know, it will take only less than a minute
of your time.
This patch prepares fbcon for console rotation and contains the following
changes:
- add rotate field in struct fbcon_ops to keep fbcon's current rotation
angle
- add con_rotate field in struct display to store per-display rotation angle
- create a private copy of the current var to fbcon. This will prevent
fbcon from directly manipulating info->var, especially the fields xoffset,
yoffset and vmode.
- add ability to swap pertinent axes (xres, yres; xpanstep, ypanstep; etc)
depending on the rotation angle
- change global update_var() (function that sets the screen start address)
as an fbcon method update_start. This is required because the axes, start
offset, and/or direction can be reversed depending on the rotation angle.
- add fbcon method rotate_font() which will rotate each character bitmap to
the correct angle of rotation.
- add fbcon boot option 'rotate' to select the angle of rotation at bootime.
Currently does nothing until all patches are applied.
Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-11-09 12:39:09 +07:00
|
|
|
EXPORT_SYMBOL(fb_display);
|
|
|
|
|
|
2005-04-17 05:20:36 +07:00
|
|
|
static signed char con2fb_map[MAX_NR_CONSOLES];
|
|
|
|
|
static signed char con2fb_map_boot[MAX_NR_CONSOLES];
|
|
|
|
|
static int logo_height;
|
|
|
|
|
static int logo_lines;
|
|
|
|
|
/* logo_shown is an index to vc_cons when >= 0; otherwise follows FBCON_LOGO
|
|
|
|
|
enums. */
|
|
|
|
|
static int logo_shown = FBCON_LOGO_CANSHOW;
|
|
|
|
|
/* Software scrollback */
|
|
|
|
|
static int fbcon_softback_size = 32768;
|
|
|
|
|
static unsigned long softback_buf, softback_curr;
|
|
|
|
|
static unsigned long softback_in;
|
|
|
|
|
static unsigned long softback_top, softback_end;
|
|
|
|
|
static int softback_lines;
|
|
|
|
|
/* console mappings */
|
|
|
|
|
static int first_fb_vc;
|
|
|
|
|
static int last_fb_vc = MAX_NR_CONSOLES - 1;
|
|
|
|
|
static int fbcon_is_default = 1;
|
|
|
|
|
/* font data */
|
|
|
|
|
static char fontname[40];
|
|
|
|
|
|
|
|
|
|
/* current fb_info */
|
|
|
|
|
static int info_idx = -1;
|
|
|
|
|
|
[PATCH] fbcon: Console Rotation - Prepare fbcon for console rotation
This patch series implements generic code to rotate the console at 90, 180,
and 270 degrees. The implementation is completely done in the framebuffer
console level, thus no changes to the framebuffer layer or to the drivers
are needed.
Console rotation is required by some Sharp-based devices where the natural
orientation of the display is not at 0 degrees. Also, users that have
displays that can pivot will benefit by having a console in portrait mode
if they so desire.
The choice to implement the code in the console layer rather than in the
framebuffer layer is due to the following reasons:
- it's fast
- it does not require driver changes
- it can coexist with devices that can rotate the display at the hardware level
- it complements graphics applications that can do display rotation
The changes to core fbcon are minimal-- recognition of the console
rotation angle so it can swap directions, origins and axes (xres vs yres,
xpanstep vs ypanstep, xoffset vs yoffset, etc) and storage of the rotation
angle per display. The bulk of the code that does the actual drawing to the
screen are placed in separate files. Each angle of rotation has separate
methods (bmove, clear, putcs, cursor, update_start which is derived from
update_var, and clear_margins). To mimimize processing time, the fontdata
are pre-rotated at each console switch (only if the font or the angle has
changed).
The option can be compiled out (CONFIG_FRAMEBUFFER_CONSOLE_ROTATION = n) if
rotation is not needed.
Choosing the rotation angle can be done in several ways:
1. boot option fbcon=rotate:n, where
n = 0 - normal
n = 1 - 90 degrees (clockwise)
n = 2 - 180 degrees (upside down)
n = 3 - 270 degrees (counterclockwise)
2. echo n > /sys/class/graphics/fb[num]/con_rotate
where n is the same as described above. It sets the angle of rotation
of the current console
3 echo n > /sys/class/graphics/fb[num]/con_rotate_all
where n is the same as described above. Globally sets the angle of
rotation.
GOTCHAS:
The option, especially at angles of 90 and 270 degrees, will exercise
the least used code of drivers. Namely, at these angles, panning is done
in the x-axis, so it can reveal bugs in the driver if xpanstep is set
incorrectly. A workaround is to set xpanstep = 0.
Secondly, at these angles, the framebuffer memory access can be
unaligned if (fontheight * bpp) % 32 ~= 0 which can reveal bugs in the drivers
imageblit, fillrect and copyarea functions. (I think cfbfillrect may have
this buglet). A workaround is to use a standard 8x16 font.
Speed:
The scrolling speed difference between 0 and 180 degrees is minimal,
somewhere areound 1-2%. At 90 or 270 degress, speed drops down to a vicinity
of 30-40%. This is understandable because the blit direction is across the
framebuffer "direction." Scrolling will be helped at these angles if xpanstep
is not equal to zero, use of 8x16 fonts, and setting xres_virtual >= xres * 2.
Note: The code is tested on little-endian only, so I don't know if it will
work in big-endian. Please let me know, it will take only less than a minute
of your time.
This patch prepares fbcon for console rotation and contains the following
changes:
- add rotate field in struct fbcon_ops to keep fbcon's current rotation
angle
- add con_rotate field in struct display to store per-display rotation angle
- create a private copy of the current var to fbcon. This will prevent
fbcon from directly manipulating info->var, especially the fields xoffset,
yoffset and vmode.
- add ability to swap pertinent axes (xres, yres; xpanstep, ypanstep; etc)
depending on the rotation angle
- change global update_var() (function that sets the screen start address)
as an fbcon method update_start. This is required because the axes, start
offset, and/or direction can be reversed depending on the rotation angle.
- add fbcon method rotate_font() which will rotate each character bitmap to
the correct angle of rotation.
- add fbcon boot option 'rotate' to select the angle of rotation at bootime.
Currently does nothing until all patches are applied.
Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-11-09 12:39:09 +07:00
|
|
|
/* console rotation */
|
|
|
|
|
static int rotate;
|
|
|
|
|
|
2005-04-17 05:20:36 +07:00
|
|
|
static const struct consw fb_con;
|
|
|
|
|
|
|
|
|
|
#define CM_SOFTBACK (8)
|
|
|
|
|
|
|
|
|
|
#define advance_row(p, delta) (unsigned short *)((unsigned long)(p) + (delta) * vc->vc_size_row)
|
|
|
|
|
|
|
|
|
|
static void fbcon_free_font(struct display *);
|
|
|
|
|
static int fbcon_set_origin(struct vc_data *);
|
|
|
|
|
|
|
|
|
|
#define CURSOR_DRAW_DELAY (1)
|
|
|
|
|
|
|
|
|
|
/* # VBL ints between cursor state changes */
|
|
|
|
|
#define ATARI_CURSOR_BLINK_RATE (42)
|
|
|
|
|
#define MAC_CURSOR_BLINK_RATE (32)
|
|
|
|
|
#define DEFAULT_CURSOR_BLINK_RATE (20)
|
|
|
|
|
|
|
|
|
|
static int vbl_cursor_cnt;
|
|
|
|
|
|
|
|
|
|
#define divides(a, b) ((!(a) || (b)%(a)) ? 0 : 1)
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* Interface used by the world
|
|
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
static const char *fbcon_startup(void);
|
|
|
|
|
static void fbcon_init(struct vc_data *vc, int init);
|
|
|
|
|
static void fbcon_deinit(struct vc_data *vc);
|
|
|
|
|
static void fbcon_clear(struct vc_data *vc, int sy, int sx, int height,
|
|
|
|
|
int width);
|
|
|
|
|
static void fbcon_putc(struct vc_data *vc, int c, int ypos, int xpos);
|
|
|
|
|
static void fbcon_putcs(struct vc_data *vc, const unsigned short *s,
|
|
|
|
|
int count, int ypos, int xpos);
|
|
|
|
|
static void fbcon_clear_margins(struct vc_data *vc, int bottom_only);
|
|
|
|
|
static void fbcon_cursor(struct vc_data *vc, int mode);
|
|
|
|
|
static int fbcon_scroll(struct vc_data *vc, int t, int b, int dir,
|
|
|
|
|
int count);
|
|
|
|
|
static void fbcon_bmove(struct vc_data *vc, int sy, int sx, int dy, int dx,
|
|
|
|
|
int height, int width);
|
|
|
|
|
static int fbcon_switch(struct vc_data *vc);
|
|
|
|
|
static int fbcon_blank(struct vc_data *vc, int blank, int mode_switch);
|
|
|
|
|
static int fbcon_set_palette(struct vc_data *vc, unsigned char *table);
|
|
|
|
|
static int fbcon_scrolldelta(struct vc_data *vc, int lines);
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* Internal routines
|
|
|
|
|
*/
|
|
|
|
|
static __inline__ void ywrap_up(struct vc_data *vc, int count);
|
|
|
|
|
static __inline__ void ywrap_down(struct vc_data *vc, int count);
|
|
|
|
|
static __inline__ void ypan_up(struct vc_data *vc, int count);
|
|
|
|
|
static __inline__ void ypan_down(struct vc_data *vc, int count);
|
|
|
|
|
static void fbcon_bmove_rec(struct vc_data *vc, struct display *p, int sy, int sx,
|
|
|
|
|
int dy, int dx, int height, int width, u_int y_break);
|
|
|
|
|
static void fbcon_set_disp(struct fb_info *info, struct fb_var_screeninfo *var,
|
|
|
|
|
struct vc_data *vc);
|
|
|
|
|
static void fbcon_preset_disp(struct fb_info *info, struct fb_var_screeninfo *var,
|
|
|
|
|
int unit);
|
|
|
|
|
static void fbcon_redraw_move(struct vc_data *vc, struct display *p,
|
|
|
|
|
int line, int count, int dy);
|
2005-11-09 12:39:15 +07:00
|
|
|
static void fbcon_modechanged(struct fb_info *info);
|
|
|
|
|
static void fbcon_set_all_vcs(struct fb_info *info);
|
2005-04-17 05:20:36 +07:00
|
|
|
|
|
|
|
|
#ifdef CONFIG_MAC
|
|
|
|
|
/*
|
|
|
|
|
* On the Macintoy, there may or may not be a working VBL int. We need to probe
|
|
|
|
|
*/
|
|
|
|
|
static int vbl_detected;
|
|
|
|
|
|
|
|
|
|
static irqreturn_t fb_vbl_detect(int irq, void *dummy, struct pt_regs *fp)
|
|
|
|
|
{
|
|
|
|
|
vbl_detected++;
|
|
|
|
|
return IRQ_HANDLED;
|
|
|
|
|
}
|
|
|
|
|
#endif
|
|
|
|
|
|
2005-11-09 12:39:12 +07:00
|
|
|
#ifdef CONFIG_FRAMEBUFFER_CONSOLE_ROTATION
|
|
|
|
|
static inline void fbcon_set_rotation(struct fb_info *info, struct display *p)
|
|
|
|
|
{
|
|
|
|
|
struct fbcon_ops *ops = info->fbcon_par;
|
|
|
|
|
|
|
|
|
|
if (!(info->flags & FBINFO_MISC_TILEBLITTING) &&
|
|
|
|
|
p->con_rotate < 4)
|
|
|
|
|
ops->rotate = p->con_rotate;
|
|
|
|
|
else
|
|
|
|
|
ops->rotate = 0;
|
|
|
|
|
}
|
2005-11-09 12:39:15 +07:00
|
|
|
|
|
|
|
|
static void fbcon_rotate(struct fb_info *info, u32 rotate)
|
|
|
|
|
{
|
|
|
|
|
struct fbcon_ops *ops= info->fbcon_par;
|
|
|
|
|
struct fb_info *fb_info;
|
|
|
|
|
|
|
|
|
|
if (!ops || ops->currcon == -1)
|
|
|
|
|
return;
|
|
|
|
|
|
|
|
|
|
fb_info = registered_fb[con2fb_map[ops->currcon]];
|
|
|
|
|
|
|
|
|
|
if (info == fb_info) {
|
|
|
|
|
struct display *p = &fb_display[ops->currcon];
|
|
|
|
|
|
|
|
|
|
if (rotate < 4)
|
|
|
|
|
p->con_rotate = rotate;
|
|
|
|
|
else
|
|
|
|
|
p->con_rotate = 0;
|
|
|
|
|
|
|
|
|
|
fbcon_modechanged(info);
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static void fbcon_rotate_all(struct fb_info *info, u32 rotate)
|
|
|
|
|
{
|
|
|
|
|
struct fbcon_ops *ops = info->fbcon_par;
|
|
|
|
|
struct vc_data *vc;
|
|
|
|
|
struct display *p;
|
|
|
|
|
int i;
|
|
|
|
|
|
|
|
|
|
if (!ops || ops->currcon < 0 || rotate > 3)
|
|
|
|
|
return;
|
|
|
|
|
|
|
|
|
|
for (i = 0; i < MAX_NR_CONSOLES; i++) {
|
|
|
|
|
vc = vc_cons[i].d;
|
|
|
|
|
if (!vc || vc->vc_mode != KD_TEXT ||
|
|
|
|
|
registered_fb[con2fb_map[i]] != info)
|
|
|
|
|
continue;
|
|
|
|
|
|
|
|
|
|
p = &fb_display[vc->vc_num];
|
|
|
|
|
p->con_rotate = rotate;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
fbcon_set_all_vcs(info);
|
|
|
|
|
}
|
2005-11-09 12:39:12 +07:00
|
|
|
#else
|
[PATCH] fbcon: Console Rotation - Prepare fbcon for console rotation
This patch series implements generic code to rotate the console at 90, 180,
and 270 degrees. The implementation is completely done in the framebuffer
console level, thus no changes to the framebuffer layer or to the drivers
are needed.
Console rotation is required by some Sharp-based devices where the natural
orientation of the display is not at 0 degrees. Also, users that have
displays that can pivot will benefit by having a console in portrait mode
if they so desire.
The choice to implement the code in the console layer rather than in the
framebuffer layer is due to the following reasons:
- it's fast
- it does not require driver changes
- it can coexist with devices that can rotate the display at the hardware level
- it complements graphics applications that can do display rotation
The changes to core fbcon are minimal-- recognition of the console
rotation angle so it can swap directions, origins and axes (xres vs yres,
xpanstep vs ypanstep, xoffset vs yoffset, etc) and storage of the rotation
angle per display. The bulk of the code that does the actual drawing to the
screen are placed in separate files. Each angle of rotation has separate
methods (bmove, clear, putcs, cursor, update_start which is derived from
update_var, and clear_margins). To mimimize processing time, the fontdata
are pre-rotated at each console switch (only if the font or the angle has
changed).
The option can be compiled out (CONFIG_FRAMEBUFFER_CONSOLE_ROTATION = n) if
rotation is not needed.
Choosing the rotation angle can be done in several ways:
1. boot option fbcon=rotate:n, where
n = 0 - normal
n = 1 - 90 degrees (clockwise)
n = 2 - 180 degrees (upside down)
n = 3 - 270 degrees (counterclockwise)
2. echo n > /sys/class/graphics/fb[num]/con_rotate
where n is the same as described above. It sets the angle of rotation
of the current console
3 echo n > /sys/class/graphics/fb[num]/con_rotate_all
where n is the same as described above. Globally sets the angle of
rotation.
GOTCHAS:
The option, especially at angles of 90 and 270 degrees, will exercise
the least used code of drivers. Namely, at these angles, panning is done
in the x-axis, so it can reveal bugs in the driver if xpanstep is set
incorrectly. A workaround is to set xpanstep = 0.
Secondly, at these angles, the framebuffer memory access can be
unaligned if (fontheight * bpp) % 32 ~= 0 which can reveal bugs in the drivers
imageblit, fillrect and copyarea functions. (I think cfbfillrect may have
this buglet). A workaround is to use a standard 8x16 font.
Speed:
The scrolling speed difference between 0 and 180 degrees is minimal,
somewhere areound 1-2%. At 90 or 270 degress, speed drops down to a vicinity
of 30-40%. This is understandable because the blit direction is across the
framebuffer "direction." Scrolling will be helped at these angles if xpanstep
is not equal to zero, use of 8x16 fonts, and setting xres_virtual >= xres * 2.
Note: The code is tested on little-endian only, so I don't know if it will
work in big-endian. Please let me know, it will take only less than a minute
of your time.
This patch prepares fbcon for console rotation and contains the following
changes:
- add rotate field in struct fbcon_ops to keep fbcon's current rotation
angle
- add con_rotate field in struct display to store per-display rotation angle
- create a private copy of the current var to fbcon. This will prevent
fbcon from directly manipulating info->var, especially the fields xoffset,
yoffset and vmode.
- add ability to swap pertinent axes (xres, yres; xpanstep, ypanstep; etc)
depending on the rotation angle
- change global update_var() (function that sets the screen start address)
as an fbcon method update_start. This is required because the axes, start
offset, and/or direction can be reversed depending on the rotation angle.
- add fbcon method rotate_font() which will rotate each character bitmap to
the correct angle of rotation.
- add fbcon boot option 'rotate' to select the angle of rotation at bootime.
Currently does nothing until all patches are applied.
Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-11-09 12:39:09 +07:00
|
|
|
static inline void fbcon_set_rotation(struct fb_info *info, struct display *p)
|
|
|
|
|
{
|
|
|
|
|
struct fbcon_ops *ops = info->fbcon_par;
|
|
|
|
|
|
|
|
|
|
ops->rotate = FB_ROTATE_UR;
|
|
|
|
|
}
|
2005-11-09 12:39:15 +07:00
|
|
|
|
|
|
|
|
static void fbcon_rotate(struct fb_info *info, u32 rotate)
|
|
|
|
|
{
|
|
|
|
|
return;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static void fbcon_rotate_all(struct fb_info *info, u32 rotate)
|
|
|
|
|
{
|
|
|
|
|
return;
|
|
|
|
|
}
|
2005-11-09 12:39:12 +07:00
|
|
|
#endif /* CONFIG_FRAMEBUFFER_CONSOLE_ROTATION */
|
[PATCH] fbcon: Console Rotation - Prepare fbcon for console rotation
This patch series implements generic code to rotate the console at 90, 180,
and 270 degrees. The implementation is completely done in the framebuffer
console level, thus no changes to the framebuffer layer or to the drivers
are needed.
Console rotation is required by some Sharp-based devices where the natural
orientation of the display is not at 0 degrees. Also, users that have
displays that can pivot will benefit by having a console in portrait mode
if they so desire.
The choice to implement the code in the console layer rather than in the
framebuffer layer is due to the following reasons:
- it's fast
- it does not require driver changes
- it can coexist with devices that can rotate the display at the hardware level
- it complements graphics applications that can do display rotation
The changes to core fbcon are minimal-- recognition of the console
rotation angle so it can swap directions, origins and axes (xres vs yres,
xpanstep vs ypanstep, xoffset vs yoffset, etc) and storage of the rotation
angle per display. The bulk of the code that does the actual drawing to the
screen are placed in separate files. Each angle of rotation has separate
methods (bmove, clear, putcs, cursor, update_start which is derived from
update_var, and clear_margins). To mimimize processing time, the fontdata
are pre-rotated at each console switch (only if the font or the angle has
changed).
The option can be compiled out (CONFIG_FRAMEBUFFER_CONSOLE_ROTATION = n) if
rotation is not needed.
Choosing the rotation angle can be done in several ways:
1. boot option fbcon=rotate:n, where
n = 0 - normal
n = 1 - 90 degrees (clockwise)
n = 2 - 180 degrees (upside down)
n = 3 - 270 degrees (counterclockwise)
2. echo n > /sys/class/graphics/fb[num]/con_rotate
where n is the same as described above. It sets the angle of rotation
of the current console
3 echo n > /sys/class/graphics/fb[num]/con_rotate_all
where n is the same as described above. Globally sets the angle of
rotation.
GOTCHAS:
The option, especially at angles of 90 and 270 degrees, will exercise
the least used code of drivers. Namely, at these angles, panning is done
in the x-axis, so it can reveal bugs in the driver if xpanstep is set
incorrectly. A workaround is to set xpanstep = 0.
Secondly, at these angles, the framebuffer memory access can be
unaligned if (fontheight * bpp) % 32 ~= 0 which can reveal bugs in the drivers
imageblit, fillrect and copyarea functions. (I think cfbfillrect may have
this buglet). A workaround is to use a standard 8x16 font.
Speed:
The scrolling speed difference between 0 and 180 degrees is minimal,
somewhere areound 1-2%. At 90 or 270 degress, speed drops down to a vicinity
of 30-40%. This is understandable because the blit direction is across the
framebuffer "direction." Scrolling will be helped at these angles if xpanstep
is not equal to zero, use of 8x16 fonts, and setting xres_virtual >= xres * 2.
Note: The code is tested on little-endian only, so I don't know if it will
work in big-endian. Please let me know, it will take only less than a minute
of your time.
This patch prepares fbcon for console rotation and contains the following
changes:
- add rotate field in struct fbcon_ops to keep fbcon's current rotation
angle
- add con_rotate field in struct display to store per-display rotation angle
- create a private copy of the current var to fbcon. This will prevent
fbcon from directly manipulating info->var, especially the fields xoffset,
yoffset and vmode.
- add ability to swap pertinent axes (xres, yres; xpanstep, ypanstep; etc)
depending on the rotation angle
- change global update_var() (function that sets the screen start address)
as an fbcon method update_start. This is required because the axes, start
offset, and/or direction can be reversed depending on the rotation angle.
- add fbcon method rotate_font() which will rotate each character bitmap to
the correct angle of rotation.
- add fbcon boot option 'rotate' to select the angle of rotation at bootime.
Currently does nothing until all patches are applied.
Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-11-09 12:39:09 +07:00
|
|
|
|
2005-11-09 12:39:15 +07:00
|
|
|
static int fbcon_get_rotate(struct fb_info *info)
|
|
|
|
|
{
|
|
|
|
|
struct fbcon_ops *ops = info->fbcon_par;
|
|
|
|
|
|
|
|
|
|
return (ops) ? ops->rotate : 0;
|
|
|
|
|
}
|
|
|
|
|
|
2005-04-17 05:20:36 +07:00
|
|
|
static inline int fbcon_is_inactive(struct vc_data *vc, struct fb_info *info)
|
|
|
|
|
{
|
|
|
|
|
struct fbcon_ops *ops = info->fbcon_par;
|
|
|
|
|
|
|
|
|
|
return (info->state != FBINFO_STATE_RUNNING ||
|
|
|
|
|
vc->vc_mode != KD_TEXT || ops->graphics);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static inline int get_color(struct vc_data *vc, struct fb_info *info,
|
|
|
|
|
u16 c, int is_fg)
|
|
|
|
|
{
|
2005-09-10 03:04:37 +07:00
|
|
|
int depth = fb_get_color_depth(&info->var, &info->fix);
|
2005-04-17 05:20:36 +07:00
|
|
|
int color = 0;
|
|
|
|
|
|
|
|
|
|
if (console_blanked) {
|
|
|
|
|
unsigned short charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff;
|
|
|
|
|
|
|
|
|
|
c = vc->vc_video_erase_char & charmask;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if (depth != 1)
|
|
|
|
|
color = (is_fg) ? attr_fgcol((vc->vc_hi_font_mask) ? 9 : 8, c)
|
|
|
|
|
: attr_bgcol((vc->vc_hi_font_mask) ? 13 : 12, c);
|
|
|
|
|
|
|
|
|
|
switch (depth) {
|
|
|
|
|
case 1:
|
|
|
|
|
{
|
2005-09-10 03:04:37 +07:00
|
|
|
int col = ~(0xfff << (max(info->var.green.length,
|
|
|
|
|
max(info->var.red.length,
|
|
|
|
|
info->var.blue.length)))) & 0xff;
|
|
|
|
|
|
2005-04-17 05:20:36 +07:00
|
|
|
/* 0 or 1 */
|
2005-09-10 03:04:37 +07:00
|
|
|
int fg = (info->fix.visual != FB_VISUAL_MONO01) ? col : 0;
|
|
|
|
|
int bg = (info->fix.visual != FB_VISUAL_MONO01) ? 0 : col;
|
2005-04-17 05:20:36 +07:00
|
|
|
|
|
|
|
|
if (console_blanked)
|
|
|
|
|
fg = bg;
|
|
|
|
|
|
|
|
|
|
color = (is_fg) ? fg : bg;
|
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
case 2:
|
|
|
|
|
/*
|
|
|
|
|
* Scale down 16-colors to 4 colors. Default 4-color palette
|
[PATCH] fbcon: Saner 16-color to 4-color conversion
Currently, the default linux 16-colors are converted to 4-colors by simply
dividing the values by 4. However, this is not necessarily correct since the
first 4 colors are converted to black, rendering them invisible.
So, for black, no conversion; for light colors, convert to gray, for normal
text color, no conversion, and for bright colors, convert to intense white.
Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-09-10 03:04:38 +07:00
|
|
|
* is grayscale. However, simply dividing the values by 4
|
|
|
|
|
* will not work, as colors 1, 2 and 3 will be scaled-down
|
|
|
|
|
* to zero rendering them invisible. So empirically convert
|
|
|
|
|
* colors to a sane 4-level grayscale.
|
2005-04-17 05:20:36 +07:00
|
|
|
*/
|
[PATCH] fbcon: Saner 16-color to 4-color conversion
Currently, the default linux 16-colors are converted to 4-colors by simply
dividing the values by 4. However, this is not necessarily correct since the
first 4 colors are converted to black, rendering them invisible.
So, for black, no conversion; for light colors, convert to gray, for normal
text color, no conversion, and for bright colors, convert to intense white.
Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-09-10 03:04:38 +07:00
|
|
|
switch (color) {
|
|
|
|
|
case 0:
|
|
|
|
|
color = 0; /* black */
|
|
|
|
|
break;
|
|
|
|
|
case 1 ... 6:
|
|
|
|
|
color = 2; /* white */
|
|
|
|
|
break;
|
|
|
|
|
case 7 ... 8:
|
|
|
|
|
color = 1; /* gray */
|
|
|
|
|
break;
|
|
|
|
|
default:
|
|
|
|
|
color = 3; /* intense white */
|
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
break;
|
2005-04-17 05:20:36 +07:00
|
|
|
case 3:
|
|
|
|
|
/*
|
|
|
|
|
* Last 8 entries of default 16-color palette is a more intense
|
|
|
|
|
* version of the first 8 (i.e., same chrominance, different
|
|
|
|
|
* luminance).
|
|
|
|
|
*/
|
|
|
|
|
color &= 7;
|
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
return color;
|
|
|
|
|
}
|
|
|
|
|
|
2005-11-07 16:00:36 +07:00
|
|
|
static void fbcon_update_softback(struct vc_data *vc)
|
|
|
|
|
{
|
|
|
|
|
int l = fbcon_softback_size / vc->vc_size_row;
|
|
|
|
|
|
|
|
|
|
if (l > 5)
|
|
|
|
|
softback_end = softback_buf + l * vc->vc_size_row;
|
|
|
|
|
else
|
|
|
|
|
/* Smaller scrollback makes no sense, and 0 would screw
|
|
|
|
|
the operation totally */
|
|
|
|
|
softback_top = 0;
|
|
|
|
|
}
|
|
|
|
|
|
2005-04-17 05:20:36 +07:00
|
|
|
static void fb_flashcursor(void *private)
|
|
|
|
|
{
|
|
|
|
|
struct fb_info *info = private;
|
|
|
|
|
struct fbcon_ops *ops = info->fbcon_par;
|
|
|
|
|
struct display *p;
|
|
|
|
|
struct vc_data *vc = NULL;
|
|
|
|
|
int c;
|
|
|
|
|
int mode;
|
|
|
|
|
|
|
|
|
|
if (ops->currcon != -1)
|
|
|
|
|
vc = vc_cons[ops->currcon].d;
|
|
|
|
|
|
|
|
|
|
if (!vc || !CON_IS_VISIBLE(vc) ||
|
|
|
|
|
fbcon_is_inactive(vc, info) ||
|
2005-07-28 01:46:06 +07:00
|
|
|
registered_fb[con2fb_map[vc->vc_num]] != info ||
|
|
|
|
|
vc_cons[ops->currcon].d->vc_deccm != 1)
|
2005-04-17 05:20:36 +07:00
|
|
|
return;
|
|
|
|
|
acquire_console_sem();
|
|
|
|
|
p = &fb_display[vc->vc_num];
|
|
|
|
|
c = scr_readw((u16 *) vc->vc_pos);
|
|
|
|
|
mode = (!ops->cursor_flash || ops->cursor_state.enable) ?
|
|
|
|
|
CM_ERASE : CM_DRAW;
|
|
|
|
|
ops->cursor(vc, info, p, mode, softback_lines, get_color(vc, info, c, 1),
|
|
|
|
|
get_color(vc, info, c, 0));
|
|
|
|
|
release_console_sem();
|
|
|
|
|
}
|
|
|
|
|
|
2005-06-30 22:30:07 +07:00
|
|
|
#if defined(CONFIG_ATARI) || defined(CONFIG_MAC)
|
2005-04-17 05:20:36 +07:00
|
|
|
static int cursor_blink_rate;
|
|
|
|
|
static irqreturn_t fb_vbl_handler(int irq, void *dev_id, struct pt_regs *fp)
|
|
|
|
|
{
|
|
|
|
|
struct fb_info *info = dev_id;
|
|
|
|
|
|
|
|
|
|
if (vbl_cursor_cnt && --vbl_cursor_cnt == 0) {
|
|
|
|
|
schedule_work(&info->queue);
|
|
|
|
|
vbl_cursor_cnt = cursor_blink_rate;
|
|
|
|
|
}
|
|
|
|
|
return IRQ_HANDLED;
|
|
|
|
|
}
|
|
|
|
|
#endif
|
|
|
|
|
|
|
|
|
|
static void cursor_timer_handler(unsigned long dev_addr)
|
|
|
|
|
{
|
|
|
|
|
struct fb_info *info = (struct fb_info *) dev_addr;
|
|
|
|
|
struct fbcon_ops *ops = info->fbcon_par;
|
|
|
|
|
|
|
|
|
|
schedule_work(&info->queue);
|
|
|
|
|
mod_timer(&ops->cursor_timer, jiffies + HZ/5);
|
|
|
|
|
}
|
|
|
|
|
|
2005-09-10 03:10:00 +07:00
|
|
|
static void fbcon_add_cursor_timer(struct fb_info *info)
|
|
|
|
|
{
|
|
|
|
|
struct fbcon_ops *ops = info->fbcon_par;
|
|
|
|
|
|
|
|
|
|
if ((!info->queue.func || info->queue.func == fb_flashcursor) &&
|
|
|
|
|
!(ops->flags & FBCON_FLAGS_CURSOR_TIMER)) {
|
|
|
|
|
if (!info->queue.func)
|
|
|
|
|
INIT_WORK(&info->queue, fb_flashcursor, info);
|
|
|
|
|
|
|
|
|
|
init_timer(&ops->cursor_timer);
|
|
|
|
|
ops->cursor_timer.function = cursor_timer_handler;
|
|
|
|
|
ops->cursor_timer.expires = jiffies + HZ / 5;
|
|
|
|
|
ops->cursor_timer.data = (unsigned long ) info;
|
|
|
|
|
add_timer(&ops->cursor_timer);
|
|
|
|
|
ops->flags |= FBCON_FLAGS_CURSOR_TIMER;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static void fbcon_del_cursor_timer(struct fb_info *info)
|
|
|
|
|
{
|
|
|
|
|
struct fbcon_ops *ops = info->fbcon_par;
|
|
|
|
|
|
|
|
|
|
if (info->queue.func == fb_flashcursor &&
|
|
|
|
|
ops->flags & FBCON_FLAGS_CURSOR_TIMER) {
|
|
|
|
|
del_timer_sync(&ops->cursor_timer);
|
|
|
|
|
ops->flags &= ~FBCON_FLAGS_CURSOR_TIMER;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
2005-04-17 05:20:36 +07:00
|
|
|
#ifndef MODULE
|
|
|
|
|
static int __init fb_console_setup(char *this_opt)
|
|
|
|
|
{
|
|
|
|
|
char *options;
|
|
|
|
|
int i, j;
|
|
|
|
|
|
|
|
|
|
if (!this_opt || !*this_opt)
|
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
|
|
while ((options = strsep(&this_opt, ",")) != NULL) {
|
|
|
|
|
if (!strncmp(options, "font:", 5))
|
|
|
|
|
strcpy(fontname, options + 5);
|
|
|
|
|
|
|
|
|
|
if (!strncmp(options, "scrollback:", 11)) {
|
|
|
|
|
options += 11;
|
|
|
|
|
if (*options) {
|
|
|
|
|
fbcon_softback_size = simple_strtoul(options, &options, 0);
|
|
|
|
|
if (*options == 'k' || *options == 'K') {
|
|
|
|
|
fbcon_softback_size *= 1024;
|
|
|
|
|
options++;
|
|
|
|
|
}
|
|
|
|
|
if (*options != ',')
|
|
|
|
|
return 0;
|
|
|
|
|
options++;
|
|
|
|
|
} else
|
|
|
|
|
return 0;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if (!strncmp(options, "map:", 4)) {
|
|
|
|
|
options += 4;
|
|
|
|
|
if (*options)
|
|
|
|
|
for (i = 0, j = 0; i < MAX_NR_CONSOLES; i++) {
|
|
|
|
|
if (!options[j])
|
|
|
|
|
j = 0;
|
|
|
|
|
con2fb_map_boot[i] =
|
|
|
|
|
(options[j++]-'0') % FB_MAX;
|
|
|
|
|
}
|
|
|
|
|
return 0;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if (!strncmp(options, "vc:", 3)) {
|
|
|
|
|
options += 3;
|
|
|
|
|
if (*options)
|
|
|
|
|
first_fb_vc = simple_strtoul(options, &options, 10) - 1;
|
|
|
|
|
if (first_fb_vc < 0)
|
|
|
|
|
first_fb_vc = 0;
|
|
|
|
|
if (*options++ == '-')
|
|
|
|
|
last_fb_vc = simple_strtoul(options, &options, 10) - 1;
|
|
|
|
|
fbcon_is_default = 0;
|
|
|
|
|
}
|
[PATCH] fbcon: Console Rotation - Prepare fbcon for console rotation
This patch series implements generic code to rotate the console at 90, 180,
and 270 degrees. The implementation is completely done in the framebuffer
console level, thus no changes to the framebuffer layer or to the drivers
are needed.
Console rotation is required by some Sharp-based devices where the natural
orientation of the display is not at 0 degrees. Also, users that have
displays that can pivot will benefit by having a console in portrait mode
if they so desire.
The choice to implement the code in the console layer rather than in the
framebuffer layer is due to the following reasons:
- it's fast
- it does not require driver changes
- it can coexist with devices that can rotate the display at the hardware level
- it complements graphics applications that can do display rotation
The changes to core fbcon are minimal-- recognition of the console
rotation angle so it can swap directions, origins and axes (xres vs yres,
xpanstep vs ypanstep, xoffset vs yoffset, etc) and storage of the rotation
angle per display. The bulk of the code that does the actual drawing to the
screen are placed in separate files. Each angle of rotation has separate
methods (bmove, clear, putcs, cursor, update_start which is derived from
update_var, and clear_margins). To mimimize processing time, the fontdata
are pre-rotated at each console switch (only if the font or the angle has
changed).
The option can be compiled out (CONFIG_FRAMEBUFFER_CONSOLE_ROTATION = n) if
rotation is not needed.
Choosing the rotation angle can be done in several ways:
1. boot option fbcon=rotate:n, where
n = 0 - normal
n = 1 - 90 degrees (clockwise)
n = 2 - 180 degrees (upside down)
n = 3 - 270 degrees (counterclockwise)
2. echo n > /sys/class/graphics/fb[num]/con_rotate
where n is the same as described above. It sets the angle of rotation
of the current console
3 echo n > /sys/class/graphics/fb[num]/con_rotate_all
where n is the same as described above. Globally sets the angle of
rotation.
GOTCHAS:
The option, especially at angles of 90 and 270 degrees, will exercise
the least used code of drivers. Namely, at these angles, panning is done
in the x-axis, so it can reveal bugs in the driver if xpanstep is set
incorrectly. A workaround is to set xpanstep = 0.
Secondly, at these angles, the framebuffer memory access can be
unaligned if (fontheight * bpp) % 32 ~= 0 which can reveal bugs in the drivers
imageblit, fillrect and copyarea functions. (I think cfbfillrect may have
this buglet). A workaround is to use a standard 8x16 font.
Speed:
The scrolling speed difference between 0 and 180 degrees is minimal,
somewhere areound 1-2%. At 90 or 270 degress, speed drops down to a vicinity
of 30-40%. This is understandable because the blit direction is across the
framebuffer "direction." Scrolling will be helped at these angles if xpanstep
is not equal to zero, use of 8x16 fonts, and setting xres_virtual >= xres * 2.
Note: The code is tested on little-endian only, so I don't know if it will
work in big-endian. Please let me know, it will take only less than a minute
of your time.
This patch prepares fbcon for console rotation and contains the following
changes:
- add rotate field in struct fbcon_ops to keep fbcon's current rotation
angle
- add con_rotate field in struct display to store per-display rotation angle
- create a private copy of the current var to fbcon. This will prevent
fbcon from directly manipulating info->var, especially the fields xoffset,
yoffset and vmode.
- add ability to swap pertinent axes (xres, yres; xpanstep, ypanstep; etc)
depending on the rotation angle
- change global update_var() (function that sets the screen start address)
as an fbcon method update_start. This is required because the axes, start
offset, and/or direction can be reversed depending on the rotation angle.
- add fbcon method rotate_font() which will rotate each character bitmap to
the correct angle of rotation.
- add fbcon boot option 'rotate' to select the angle of rotation at bootime.
Currently does nothing until all patches are applied.
Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-11-09 12:39:09 +07:00
|
|
|
|
|
|
|
|
if (!strncmp(options, "rotate:", 7)) {
|
|
|
|
|
options += 7;
|
|
|
|
|
if (*options)
|
|
|
|
|
rotate = simple_strtoul(options, &options, 0);
|
|
|
|
|
if (rotate > 3)
|
|
|
|
|
rotate = 0;
|
|
|
|
|
}
|
2005-04-17 05:20:36 +07:00
|
|
|
}
|
|
|
|
|
return 0;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
__setup("fbcon=", fb_console_setup);
|
|
|
|
|
#endif
|
|
|
|
|
|
|
|
|
|
static int search_fb_in_map(int idx)
|
|
|
|
|
{
|
|
|
|
|
int i, retval = 0;
|
|
|
|
|
|
|
|
|
|
for (i = 0; i < MAX_NR_CONSOLES; i++) {
|
|
|
|
|
if (con2fb_map[i] == idx)
|
|
|
|
|
retval = 1;
|
|
|
|
|
}
|
|
|
|
|
return retval;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static int search_for_mapped_con(void)
|
|
|
|
|
{
|
|
|
|
|
int i, retval = 0;
|
|
|
|
|
|
|
|
|
|
for (i = 0; i < MAX_NR_CONSOLES; i++) {
|
|
|
|
|
if (con2fb_map[i] != -1)
|
|
|
|
|
retval = 1;
|
|
|
|
|
}
|
|
|
|
|
return retval;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static int fbcon_takeover(int show_logo)
|
|
|
|
|
{
|
|
|
|
|
int err, i;
|
|
|
|
|
|
|
|
|
|
if (!num_registered_fb)
|
|
|
|
|
return -ENODEV;
|
|
|
|
|
|
|
|
|
|
if (!show_logo)
|
|
|
|
|
logo_shown = FBCON_LOGO_DONTSHOW;
|
|
|
|
|
|
|
|
|
|
for (i = first_fb_vc; i <= last_fb_vc; i++)
|
|
|
|
|
con2fb_map[i] = info_idx;
|
|
|
|
|
|
|
|
|
|
err = take_over_console(&fb_con, first_fb_vc, last_fb_vc,
|
|
|
|
|
fbcon_is_default);
|
|
|
|
|
if (err) {
|
|
|
|
|
for (i = first_fb_vc; i <= last_fb_vc; i++) {
|
|
|
|
|
con2fb_map[i] = -1;
|
|
|
|
|
}
|
|
|
|
|
info_idx = -1;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
return err;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static void fbcon_prepare_logo(struct vc_data *vc, struct fb_info *info,
|
|
|
|
|
int cols, int rows, int new_cols, int new_rows)
|
|
|
|
|
{
|
|
|
|
|
/* Need to make room for the logo */
|
2005-11-09 12:39:10 +07:00
|
|
|
struct fbcon_ops *ops = info->fbcon_par;
|
2005-04-17 05:20:36 +07:00
|
|
|
int cnt, erase = vc->vc_video_erase_char, step;
|
|
|
|
|
unsigned short *save = NULL, *r, *q;
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* remove underline attribute from erase character
|
|
|
|
|
* if black and white framebuffer.
|
|
|
|
|
*/
|
2005-09-10 03:04:37 +07:00
|
|
|
if (fb_get_color_depth(&info->var, &info->fix) == 1)
|
2005-04-17 05:20:36 +07:00
|
|
|
erase &= ~0x400;
|
2005-11-09 12:39:10 +07:00
|
|
|
logo_height = fb_prepare_logo(info, ops->rotate);
|
2005-04-17 05:20:36 +07:00
|
|
|
logo_lines = (logo_height + vc->vc_font.height - 1) /
|
|
|
|
|
vc->vc_font.height;
|
|
|
|
|
q = (unsigned short *) (vc->vc_origin +
|
|
|
|
|
vc->vc_size_row * rows);
|
|
|
|
|
step = logo_lines * cols;
|
|
|
|
|
for (r = q - logo_lines * cols; r < q; r++)
|
|
|
|
|
if (scr_readw(r) != vc->vc_video_erase_char)
|
|
|
|
|
break;
|
|
|
|
|
if (r != q && new_rows >= rows + logo_lines) {
|
|
|
|
|
save = kmalloc(logo_lines * new_cols * 2, GFP_KERNEL);
|
|
|
|
|
if (save) {
|
|
|
|
|
int i = cols < new_cols ? cols : new_cols;
|
|
|
|
|
scr_memsetw(save, erase, logo_lines * new_cols * 2);
|
|
|
|
|
r = q - step;
|
|
|
|
|
for (cnt = 0; cnt < logo_lines; cnt++, r += i)
|
|
|
|
|
scr_memcpyw(save + cnt * new_cols, r, 2 * i);
|
|
|
|
|
r = q;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
if (r == q) {
|
|
|
|
|
/* We can scroll screen down */
|
|
|
|
|
r = q - step - cols;
|
|
|
|
|
for (cnt = rows - logo_lines; cnt > 0; cnt--) {
|
|
|
|
|
scr_memcpyw(r + step, r, vc->vc_size_row);
|
|
|
|
|
r -= cols;
|
|
|
|
|
}
|
|
|
|
|
if (!save) {
|
|
|
|
|
vc->vc_y += logo_lines;
|
|
|
|
|
vc->vc_pos += logo_lines * vc->vc_size_row;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
scr_memsetw((unsigned short *) vc->vc_origin,
|
|
|
|
|
erase,
|
|
|
|
|
vc->vc_size_row * logo_lines);
|
|
|
|
|
|
|
|
|
|
if (CON_IS_VISIBLE(vc) && vc->vc_mode == KD_TEXT) {
|
|
|
|
|
fbcon_clear_margins(vc, 0);
|
|
|
|
|
update_screen(vc);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if (save) {
|
|
|
|
|
q = (unsigned short *) (vc->vc_origin +
|
|
|
|
|
vc->vc_size_row *
|
|
|
|
|
rows);
|
|
|
|
|
scr_memcpyw(q, save, logo_lines * new_cols * 2);
|
|
|
|
|
vc->vc_y += logo_lines;
|
|
|
|
|
vc->vc_pos += logo_lines * vc->vc_size_row;
|
|
|
|
|
kfree(save);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if (logo_lines > vc->vc_bottom) {
|
|
|
|
|
logo_shown = FBCON_LOGO_CANSHOW;
|
|
|
|
|
printk(KERN_INFO
|
|
|
|
|
"fbcon_init: disable boot-logo (boot-logo bigger than screen).\n");
|
|
|
|
|
} else if (logo_shown != FBCON_LOGO_DONTSHOW) {
|
|
|
|
|
logo_shown = FBCON_LOGO_DRAW;
|
|
|
|
|
vc->vc_top = logo_lines;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
#ifdef CONFIG_FB_TILEBLITTING
|
|
|
|
|
static void set_blitting_type(struct vc_data *vc, struct fb_info *info,
|
|
|
|
|
struct display *p)
|
|
|
|
|
{
|
|
|
|
|
struct fbcon_ops *ops = info->fbcon_par;
|
|
|
|
|
|
|
|
|
|
if ((info->flags & FBINFO_MISC_TILEBLITTING))
|
|
|
|
|
fbcon_set_tileops(vc, info, p, ops);
|
[PATCH] fbcon: Console Rotation - Prepare fbcon for console rotation
This patch series implements generic code to rotate the console at 90, 180,
and 270 degrees. The implementation is completely done in the framebuffer
console level, thus no changes to the framebuffer layer or to the drivers
are needed.
Console rotation is required by some Sharp-based devices where the natural
orientation of the display is not at 0 degrees. Also, users that have
displays that can pivot will benefit by having a console in portrait mode
if they so desire.
The choice to implement the code in the console layer rather than in the
framebuffer layer is due to the following reasons:
- it's fast
- it does not require driver changes
- it can coexist with devices that can rotate the display at the hardware level
- it complements graphics applications that can do display rotation
The changes to core fbcon are minimal-- recognition of the console
rotation angle so it can swap directions, origins and axes (xres vs yres,
xpanstep vs ypanstep, xoffset vs yoffset, etc) and storage of the rotation
angle per display. The bulk of the code that does the actual drawing to the
screen are placed in separate files. Each angle of rotation has separate
methods (bmove, clear, putcs, cursor, update_start which is derived from
update_var, and clear_margins). To mimimize processing time, the fontdata
are pre-rotated at each console switch (only if the font or the angle has
changed).
The option can be compiled out (CONFIG_FRAMEBUFFER_CONSOLE_ROTATION = n) if
rotation is not needed.
Choosing the rotation angle can be done in several ways:
1. boot option fbcon=rotate:n, where
n = 0 - normal
n = 1 - 90 degrees (clockwise)
n = 2 - 180 degrees (upside down)
n = 3 - 270 degrees (counterclockwise)
2. echo n > /sys/class/graphics/fb[num]/con_rotate
where n is the same as described above. It sets the angle of rotation
of the current console
3 echo n > /sys/class/graphics/fb[num]/con_rotate_all
where n is the same as described above. Globally sets the angle of
rotation.
GOTCHAS:
The option, especially at angles of 90 and 270 degrees, will exercise
the least used code of drivers. Namely, at these angles, panning is done
in the x-axis, so it can reveal bugs in the driver if xpanstep is set
incorrectly. A workaround is to set xpanstep = 0.
Secondly, at these angles, the framebuffer memory access can be
unaligned if (fontheight * bpp) % 32 ~= 0 which can reveal bugs in the drivers
imageblit, fillrect and copyarea functions. (I think cfbfillrect may have
this buglet). A workaround is to use a standard 8x16 font.
Speed:
The scrolling speed difference between 0 and 180 degrees is minimal,
somewhere areound 1-2%. At 90 or 270 degress, speed drops down to a vicinity
of 30-40%. This is understandable because the blit direction is across the
framebuffer "direction." Scrolling will be helped at these angles if xpanstep
is not equal to zero, use of 8x16 fonts, and setting xres_virtual >= xres * 2.
Note: The code is tested on little-endian only, so I don't know if it will
work in big-endian. Please let me know, it will take only less than a minute
of your time.
This patch prepares fbcon for console rotation and contains the following
changes:
- add rotate field in struct fbcon_ops to keep fbcon's current rotation
angle
- add con_rotate field in struct display to store per-display rotation angle
- create a private copy of the current var to fbcon. This will prevent
fbcon from directly manipulating info->var, especially the fields xoffset,
yoffset and vmode.
- add ability to swap pertinent axes (xres, yres; xpanstep, ypanstep; etc)
depending on the rotation angle
- change global update_var() (function that sets the screen start address)
as an fbcon method update_start. This is required because the axes, start
offset, and/or direction can be reversed depending on the rotation angle.
- add fbcon method rotate_font() which will rotate each character bitmap to
the correct angle of rotation.
- add fbcon boot option 'rotate' to select the angle of rotation at bootime.
Currently does nothing until all patches are applied.
Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-11-09 12:39:09 +07:00
|
|
|
else {
|
|
|
|
|
struct display *disp;
|
|
|
|
|
|
|
|
|
|
disp = (p) ? p : &fb_display[vc->vc_num];
|
|
|
|
|
fbcon_set_rotation(info, disp);
|
2005-04-17 05:20:36 +07:00
|
|
|
fbcon_set_bitops(ops);
|
[PATCH] fbcon: Console Rotation - Prepare fbcon for console rotation
This patch series implements generic code to rotate the console at 90, 180,
and 270 degrees. The implementation is completely done in the framebuffer
console level, thus no changes to the framebuffer layer or to the drivers
are needed.
Console rotation is required by some Sharp-based devices where the natural
orientation of the display is not at 0 degrees. Also, users that have
displays that can pivot will benefit by having a console in portrait mode
if they so desire.
The choice to implement the code in the console layer rather than in the
framebuffer layer is due to the following reasons:
- it's fast
- it does not require driver changes
- it can coexist with devices that can rotate the display at the hardware level
- it complements graphics applications that can do display rotation
The changes to core fbcon are minimal-- recognition of the console
rotation angle so it can swap directions, origins and axes (xres vs yres,
xpanstep vs ypanstep, xoffset vs yoffset, etc) and storage of the rotation
angle per display. The bulk of the code that does the actual drawing to the
screen are placed in separate files. Each angle of rotation has separate
methods (bmove, clear, putcs, cursor, update_start which is derived from
update_var, and clear_margins). To mimimize processing time, the fontdata
are pre-rotated at each console switch (only if the font or the angle has
changed).
The option can be compiled out (CONFIG_FRAMEBUFFER_CONSOLE_ROTATION = n) if
rotation is not needed.
Choosing the rotation angle can be done in several ways:
1. boot option fbcon=rotate:n, where
n = 0 - normal
n = 1 - 90 degrees (clockwise)
n = 2 - 180 degrees (upside down)
n = 3 - 270 degrees (counterclockwise)
2. echo n > /sys/class/graphics/fb[num]/con_rotate
where n is the same as described above. It sets the angle of rotation
of the current console
3 echo n > /sys/class/graphics/fb[num]/con_rotate_all
where n is the same as described above. Globally sets the angle of
rotation.
GOTCHAS:
The option, especially at angles of 90 and 270 degrees, will exercise
the least used code of drivers. Namely, at these angles, panning is done
in the x-axis, so it can reveal bugs in the driver if xpanstep is set
incorrectly. A workaround is to set xpanstep = 0.
Secondly, at these angles, the framebuffer memory access can be
unaligned if (fontheight * bpp) % 32 ~= 0 which can reveal bugs in the drivers
imageblit, fillrect and copyarea functions. (I think cfbfillrect may have
this buglet). A workaround is to use a standard 8x16 font.
Speed:
The scrolling speed difference between 0 and 180 degrees is minimal,
somewhere areound 1-2%. At 90 or 270 degress, speed drops down to a vicinity
of 30-40%. This is understandable because the blit direction is across the
framebuffer "direction." Scrolling will be helped at these angles if xpanstep
is not equal to zero, use of 8x16 fonts, and setting xres_virtual >= xres * 2.
Note: The code is tested on little-endian only, so I don't know if it will
work in big-endian. Please let me know, it will take only less than a minute
of your time.
This patch prepares fbcon for console rotation and contains the following
changes:
- add rotate field in struct fbcon_ops to keep fbcon's current rotation
angle
- add con_rotate field in struct display to store per-display rotation angle
- create a private copy of the current var to fbcon. This will prevent
fbcon from directly manipulating info->var, especially the fields xoffset,
yoffset and vmode.
- add ability to swap pertinent axes (xres, yres; xpanstep, ypanstep; etc)
depending on the rotation angle
- change global update_var() (function that sets the screen start address)
as an fbcon method update_start. This is required because the axes, start
offset, and/or direction can be reversed depending on the rotation angle.
- add fbcon method rotate_font() which will rotate each character bitmap to
the correct angle of rotation.
- add fbcon boot option 'rotate' to select the angle of rotation at bootime.
Currently does nothing until all patches are applied.
Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-11-09 12:39:09 +07:00
|
|
|
}
|
2005-04-17 05:20:36 +07:00
|
|
|
}
|
|
|
|
|
#else
|
|
|
|
|
static void set_blitting_type(struct vc_data *vc, struct fb_info *info,
|
|
|
|
|
struct display *p)
|
|
|
|
|
{
|
|
|
|
|
struct fbcon_ops *ops = info->fbcon_par;
|
[PATCH] fbcon: Console Rotation - Prepare fbcon for console rotation
This patch series implements generic code to rotate the console at 90, 180,
and 270 degrees. The implementation is completely done in the framebuffer
console level, thus no changes to the framebuffer layer or to the drivers
are needed.
Console rotation is required by some Sharp-based devices where the natural
orientation of the display is not at 0 degrees. Also, users that have
displays that can pivot will benefit by having a console in portrait mode
if they so desire.
The choice to implement the code in the console layer rather than in the
framebuffer layer is due to the following reasons:
- it's fast
- it does not require driver changes
- it can coexist with devices that can rotate the display at the hardware level
- it complements graphics applications that can do display rotation
The changes to core fbcon are minimal-- recognition of the console
rotation angle so it can swap directions, origins and axes (xres vs yres,
xpanstep vs ypanstep, xoffset vs yoffset, etc) and storage of the rotation
angle per display. The bulk of the code that does the actual drawing to the
screen are placed in separate files. Each angle of rotation has separate
methods (bmove, clear, putcs, cursor, update_start which is derived from
update_var, and clear_margins). To mimimize processing time, the fontdata
are pre-rotated at each console switch (only if the font or the angle has
changed).
The option can be compiled out (CONFIG_FRAMEBUFFER_CONSOLE_ROTATION = n) if
rotation is not needed.
Choosing the rotation angle can be done in several ways:
1. boot option fbcon=rotate:n, where
n = 0 - normal
n = 1 - 90 degrees (clockwise)
n = 2 - 180 degrees (upside down)
n = 3 - 270 degrees (counterclockwise)
2. echo n > /sys/class/graphics/fb[num]/con_rotate
where n is the same as described above. It sets the angle of rotation
of the current console
3 echo n > /sys/class/graphics/fb[num]/con_rotate_all
where n is the same as described above. Globally sets the angle of
rotation.
GOTCHAS:
The option, especially at angles of 90 and 270 degrees, will exercise
the least used code of drivers. Namely, at these angles, panning is done
in the x-axis, so it can reveal bugs in the driver if xpanstep is set
incorrectly. A workaround is to set xpanstep = 0.
Secondly, at these angles, the framebuffer memory access can be
unaligned if (fontheight * bpp) % 32 ~= 0 which can reveal bugs in the drivers
imageblit, fillrect and copyarea functions. (I think cfbfillrect may have
this buglet). A workaround is to use a standard 8x16 font.
Speed:
The scrolling speed difference between 0 and 180 degrees is minimal,
somewhere areound 1-2%. At 90 or 270 degress, speed drops down to a vicinity
of 30-40%. This is understandable because the blit direction is across the
framebuffer "direction." Scrolling will be helped at these angles if xpanstep
is not equal to zero, use of 8x16 fonts, and setting xres_virtual >= xres * 2.
Note: The code is tested on little-endian only, so I don't know if it will
work in big-endian. Please let me know, it will take only less than a minute
of your time.
This patch prepares fbcon for console rotation and contains the following
changes:
- add rotate field in struct fbcon_ops to keep fbcon's current rotation
angle
- add con_rotate field in struct display to store per-display rotation angle
- create a private copy of the current var to fbcon. This will prevent
fbcon from directly manipulating info->var, especially the fields xoffset,
yoffset and vmode.
- add ability to swap pertinent axes (xres, yres; xpanstep, ypanstep; etc)
depending on the rotation angle
- change global update_var() (function that sets the screen start address)
as an fbcon method update_start. This is required because the axes, start
offset, and/or direction can be reversed depending on the rotation angle.
- add fbcon method rotate_font() which will rotate each character bitmap to
the correct angle of rotation.
- add fbcon boot option 'rotate' to select the angle of rotation at bootime.
Currently does nothing until all patches are applied.
Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-11-09 12:39:09 +07:00
|
|
|
struct display *disp;
|
2005-04-17 05:20:36 +07:00
|
|
|
|
|
|
|
|
info->flags &= ~FBINFO_MISC_TILEBLITTING;
|
[PATCH] fbcon: Console Rotation - Prepare fbcon for console rotation
This patch series implements generic code to rotate the console at 90, 180,
and 270 degrees. The implementation is completely done in the framebuffer
console level, thus no changes to the framebuffer layer or to the drivers
are needed.
Console rotation is required by some Sharp-based devices where the natural
orientation of the display is not at 0 degrees. Also, users that have
displays that can pivot will benefit by having a console in portrait mode
if they so desire.
The choice to implement the code in the console layer rather than in the
framebuffer layer is due to the following reasons:
- it's fast
- it does not require driver changes
- it can coexist with devices that can rotate the display at the hardware level
- it complements graphics applications that can do display rotation
The changes to core fbcon are minimal-- recognition of the console
rotation angle so it can swap directions, origins and axes (xres vs yres,
xpanstep vs ypanstep, xoffset vs yoffset, etc) and storage of the rotation
angle per display. The bulk of the code that does the actual drawing to the
screen are placed in separate files. Each angle of rotation has separate
methods (bmove, clear, putcs, cursor, update_start which is derived from
update_var, and clear_margins). To mimimize processing time, the fontdata
are pre-rotated at each console switch (only if the font or the angle has
changed).
The option can be compiled out (CONFIG_FRAMEBUFFER_CONSOLE_ROTATION = n) if
rotation is not needed.
Choosing the rotation angle can be done in several ways:
1. boot option fbcon=rotate:n, where
n = 0 - normal
n = 1 - 90 degrees (clockwise)
n = 2 - 180 degrees (upside down)
n = 3 - 270 degrees (counterclockwise)
2. echo n > /sys/class/graphics/fb[num]/con_rotate
where n is the same as described above. It sets the angle of rotation
of the current console
3 echo n > /sys/class/graphics/fb[num]/con_rotate_all
where n is the same as described above. Globally sets the angle of
rotation.
GOTCHAS:
The option, especially at angles of 90 and 270 degrees, will exercise
the least used code of drivers. Namely, at these angles, panning is done
in the x-axis, so it can reveal bugs in the driver if xpanstep is set
incorrectly. A workaround is to set xpanstep = 0.
Secondly, at these angles, the framebuffer memory access can be
unaligned if (fontheight * bpp) % 32 ~= 0 which can reveal bugs in the drivers
imageblit, fillrect and copyarea functions. (I think cfbfillrect may have
this buglet). A workaround is to use a standard 8x16 font.
Speed:
The scrolling speed difference between 0 and 180 degrees is minimal,
somewhere areound 1-2%. At 90 or 270 degress, speed drops down to a vicinity
of 30-40%. This is understandable because the blit direction is across the
framebuffer "direction." Scrolling will be helped at these angles if xpanstep
is not equal to zero, use of 8x16 fonts, and setting xres_virtual >= xres * 2.
Note: The code is tested on little-endian only, so I don't know if it will
work in big-endian. Please let me know, it will take only less than a minute
of your time.
This patch prepares fbcon for console rotation and contains the following
changes:
- add rotate field in struct fbcon_ops to keep fbcon's current rotation
angle
- add con_rotate field in struct display to store per-display rotation angle
- create a private copy of the current var to fbcon. This will prevent
fbcon from directly manipulating info->var, especially the fields xoffset,
yoffset and vmode.
- add ability to swap pertinent axes (xres, yres; xpanstep, ypanstep; etc)
depending on the rotation angle
- change global update_var() (function that sets the screen start address)
as an fbcon method update_start. This is required because the axes, start
offset, and/or direction can be reversed depending on the rotation angle.
- add fbcon method rotate_font() which will rotate each character bitmap to
the correct angle of rotation.
- add fbcon boot option 'rotate' to select the angle of rotation at bootime.
Currently does nothing until all patches are applied.
Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-11-09 12:39:09 +07:00
|
|
|
disp = (p) ? p : &fb_display[vc->vc_num];
|
|
|
|
|
fbcon_set_rotation(info, disp);
|
2005-04-17 05:20:36 +07:00
|
|
|
fbcon_set_bitops(ops);
|
|
|
|
|
}
|
|
|
|
|
#endif /* CONFIG_MISC_TILEBLITTING */
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
static int con2fb_acquire_newinfo(struct vc_data *vc, struct fb_info *info,
|
|
|
|
|
int unit, int oldidx)
|
|
|
|
|
{
|
|
|
|
|
struct fbcon_ops *ops = NULL;
|
|
|
|
|
int err = 0;
|
|
|
|
|
|
|
|
|
|
if (!try_module_get(info->fbops->owner))
|
|
|
|
|
err = -ENODEV;
|
|
|
|
|
|
|
|
|
|
if (!err && info->fbops->fb_open &&
|
|
|
|
|
info->fbops->fb_open(info, 0))
|
|
|
|
|
err = -ENODEV;
|
|
|
|
|
|
|
|
|
|
if (!err) {
|
|
|
|
|
ops = kmalloc(sizeof(struct fbcon_ops), GFP_KERNEL);
|
|
|
|
|
if (!ops)
|
|
|
|
|
err = -ENOMEM;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if (!err) {
|
|
|
|
|
memset(ops, 0, sizeof(struct fbcon_ops));
|
|
|
|
|
info->fbcon_par = ops;
|
|
|
|
|
set_blitting_type(vc, info, NULL);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if (err) {
|
|
|
|
|
con2fb_map[unit] = oldidx;
|
|
|
|
|
module_put(info->fbops->owner);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
return err;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static int con2fb_release_oldinfo(struct vc_data *vc, struct fb_info *oldinfo,
|
|
|
|
|
struct fb_info *newinfo, int unit,
|
|
|
|
|
int oldidx, int found)
|
|
|
|
|
{
|
|
|
|
|
struct fbcon_ops *ops = oldinfo->fbcon_par;
|
|
|
|
|
int err = 0;
|
|
|
|
|
|
|
|
|
|
if (oldinfo->fbops->fb_release &&
|
|
|
|
|
oldinfo->fbops->fb_release(oldinfo, 0)) {
|
|
|
|
|
con2fb_map[unit] = oldidx;
|
|
|
|
|
if (!found && newinfo->fbops->fb_release)
|
|
|
|
|
newinfo->fbops->fb_release(newinfo, 0);
|
|
|
|
|
if (!found)
|
|
|
|
|
module_put(newinfo->fbops->owner);
|
|
|
|
|
err = -ENODEV;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if (!err) {
|
2005-09-10 03:10:00 +07:00
|
|
|
fbcon_del_cursor_timer(oldinfo);
|
2005-04-17 05:20:36 +07:00
|
|
|
kfree(ops->cursor_state.mask);
|
|
|
|
|
kfree(ops->cursor_data);
|
[PATCH] fbcon: Console Rotation - Prepare fbcon for console rotation
This patch series implements generic code to rotate the console at 90, 180,
and 270 degrees. The implementation is completely done in the framebuffer
console level, thus no changes to the framebuffer layer or to the drivers
are needed.
Console rotation is required by some Sharp-based devices where the natural
orientation of the display is not at 0 degrees. Also, users that have
displays that can pivot will benefit by having a console in portrait mode
if they so desire.
The choice to implement the code in the console layer rather than in the
framebuffer layer is due to the following reasons:
- it's fast
- it does not require driver changes
- it can coexist with devices that can rotate the display at the hardware level
- it complements graphics applications that can do display rotation
The changes to core fbcon are minimal-- recognition of the console
rotation angle so it can swap directions, origins and axes (xres vs yres,
xpanstep vs ypanstep, xoffset vs yoffset, etc) and storage of the rotation
angle per display. The bulk of the code that does the actual drawing to the
screen are placed in separate files. Each angle of rotation has separate
methods (bmove, clear, putcs, cursor, update_start which is derived from
update_var, and clear_margins). To mimimize processing time, the fontdata
are pre-rotated at each console switch (only if the font or the angle has
changed).
The option can be compiled out (CONFIG_FRAMEBUFFER_CONSOLE_ROTATION = n) if
rotation is not needed.
Choosing the rotation angle can be done in several ways:
1. boot option fbcon=rotate:n, where
n = 0 - normal
n = 1 - 90 degrees (clockwise)
n = 2 - 180 degrees (upside down)
n = 3 - 270 degrees (counterclockwise)
2. echo n > /sys/class/graphics/fb[num]/con_rotate
where n is the same as described above. It sets the angle of rotation
of the current console
3 echo n > /sys/class/graphics/fb[num]/con_rotate_all
where n is the same as described above. Globally sets the angle of
rotation.
GOTCHAS:
The option, especially at angles of 90 and 270 degrees, will exercise
the least used code of drivers. Namely, at these angles, panning is done
in the x-axis, so it can reveal bugs in the driver if xpanstep is set
incorrectly. A workaround is to set xpanstep = 0.
Secondly, at these angles, the framebuffer memory access can be
unaligned if (fontheight * bpp) % 32 ~= 0 which can reveal bugs in the drivers
imageblit, fillrect and copyarea functions. (I think cfbfillrect may have
this buglet). A workaround is to use a standard 8x16 font.
Speed:
The scrolling speed difference between 0 and 180 degrees is minimal,
somewhere areound 1-2%. At 90 or 270 degress, speed drops down to a vicinity
of 30-40%. This is understandable because the blit direction is across the
framebuffer "direction." Scrolling will be helped at these angles if xpanstep
is not equal to zero, use of 8x16 fonts, and setting xres_virtual >= xres * 2.
Note: The code is tested on little-endian only, so I don't know if it will
work in big-endian. Please let me know, it will take only less than a minute
of your time.
This patch prepares fbcon for console rotation and contains the following
changes:
- add rotate field in struct fbcon_ops to keep fbcon's current rotation
angle
- add con_rotate field in struct display to store per-display rotation angle
- create a private copy of the current var to fbcon. This will prevent
fbcon from directly manipulating info->var, especially the fields xoffset,
yoffset and vmode.
- add ability to swap pertinent axes (xres, yres; xpanstep, ypanstep; etc)
depending on the rotation angle
- change global update_var() (function that sets the screen start address)
as an fbcon method update_start. This is required because the axes, start
offset, and/or direction can be reversed depending on the rotation angle.
- add fbcon method rotate_font() which will rotate each character bitmap to
the correct angle of rotation.
- add fbcon boot option 'rotate' to select the angle of rotation at bootime.
Currently does nothing until all patches are applied.
Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-11-09 12:39:09 +07:00
|
|
|
kfree(ops->fontbuffer);
|
2005-04-17 05:20:36 +07:00
|
|
|
kfree(oldinfo->fbcon_par);
|
|
|
|
|
oldinfo->fbcon_par = NULL;
|
|
|
|
|
module_put(oldinfo->fbops->owner);
|
2005-11-07 16:00:38 +07:00
|
|
|
/*
|
|
|
|
|
If oldinfo and newinfo are driving the same hardware,
|
|
|
|
|
the fb_release() method of oldinfo may attempt to
|
|
|
|
|
restore the hardware state. This will leave the
|
|
|
|
|
newinfo in an undefined state. Thus, a call to
|
|
|
|
|
fb_set_par() may be needed for the newinfo.
|
|
|
|
|
*/
|
|
|
|
|
if (newinfo->fbops->fb_set_par)
|
|
|
|
|
newinfo->fbops->fb_set_par(newinfo);
|
2005-04-17 05:20:36 +07:00
|
|
|
}
|
|
|
|
|
|
|
|
|
|
return err;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static void con2fb_init_display(struct vc_data *vc, struct fb_info *info,
|
|
|
|
|
int unit, int show_logo)
|
|
|
|
|
{
|
|
|
|
|
struct fbcon_ops *ops = info->fbcon_par;
|
|
|
|
|
|
|
|
|
|
ops->currcon = fg_console;
|
|
|
|
|
|
|
|
|
|
if (info->fbops->fb_set_par && !(ops->flags & FBCON_FLAGS_INIT))
|
|
|
|
|
info->fbops->fb_set_par(info);
|
|
|
|
|
|
|
|
|
|
ops->flags |= FBCON_FLAGS_INIT;
|
|
|
|
|
ops->graphics = 0;
|
|
|
|
|
|
|
|
|
|
if (vc)
|
|
|
|
|
fbcon_set_disp(info, &info->var, vc);
|
|
|
|
|
else
|
|
|
|
|
fbcon_preset_disp(info, &info->var, unit);
|
|
|
|
|
|
|
|
|
|
if (show_logo) {
|
|
|
|
|
struct vc_data *fg_vc = vc_cons[fg_console].d;
|
|
|
|
|
struct fb_info *fg_info =
|
|
|
|
|
registered_fb[con2fb_map[fg_console]];
|
|
|
|
|
|
|
|
|
|
fbcon_prepare_logo(fg_vc, fg_info, fg_vc->vc_cols,
|
|
|
|
|
fg_vc->vc_rows, fg_vc->vc_cols,
|
|
|
|
|
fg_vc->vc_rows);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
update_screen(vc_cons[fg_console].d);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
* set_con2fb_map - map console to frame buffer device
|
|
|
|
|
* @unit: virtual console number to map
|
|
|
|
|
* @newidx: frame buffer index to map virtual console to
|
|
|
|
|
* @user: user request
|
|
|
|
|
*
|
|
|
|
|
* Maps a virtual console @unit to a frame buffer device
|
|
|
|
|
* @newidx.
|
|
|
|
|
*/
|
|
|
|
|
static int set_con2fb_map(int unit, int newidx, int user)
|
|
|
|
|
{
|
|
|
|
|
struct vc_data *vc = vc_cons[unit].d;
|
|
|
|
|
int oldidx = con2fb_map[unit];
|
|
|
|
|
struct fb_info *info = registered_fb[newidx];
|
|
|
|
|
struct fb_info *oldinfo = NULL;
|
|
|
|
|
int found, err = 0;
|
|
|
|
|
|
|
|
|
|
if (oldidx == newidx)
|
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
|
|
if (!info)
|
|
|
|
|
err = -EINVAL;
|
|
|
|
|
|
|
|
|
|
if (!err && !search_for_mapped_con()) {
|
|
|
|
|
info_idx = newidx;
|
|
|
|
|
return fbcon_takeover(0);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if (oldidx != -1)
|
|
|
|
|
oldinfo = registered_fb[oldidx];
|
|
|
|
|
|
|
|
|
|
found = search_fb_in_map(newidx);
|
|
|
|
|
|
|
|
|
|
acquire_console_sem();
|
|
|
|
|
con2fb_map[unit] = newidx;
|
|
|
|
|
if (!err && !found)
|
|
|
|
|
err = con2fb_acquire_newinfo(vc, info, unit, oldidx);
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* If old fb is not mapped to any of the consoles,
|
|
|
|
|
* fbcon should release it.
|
|
|
|
|
*/
|
|
|
|
|
if (!err && oldinfo && !search_fb_in_map(oldidx))
|
|
|
|
|
err = con2fb_release_oldinfo(vc, oldinfo, info, unit, oldidx,
|
|
|
|
|
found);
|
|
|
|
|
|
|
|
|
|
if (!err) {
|
|
|
|
|
int show_logo = (fg_console == 0 && !user &&
|
|
|
|
|
logo_shown != FBCON_LOGO_DONTSHOW);
|
|
|
|
|
|
|
|
|
|
if (!found)
|
2005-09-10 03:10:00 +07:00
|
|
|
fbcon_add_cursor_timer(info);
|
2005-04-17 05:20:36 +07:00
|
|
|
con2fb_map_boot[unit] = newidx;
|
|
|
|
|
con2fb_init_display(vc, info, unit, show_logo);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
release_console_sem();
|
|
|
|
|
return err;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* Low Level Operations
|
|
|
|
|
*/
|
|
|
|
|
/* NOTE: fbcon cannot be __init: it may be called from take_over_console later */
|
|
|
|
|
static int var_to_display(struct display *disp,
|
|
|
|
|
struct fb_var_screeninfo *var,
|
|
|
|
|
struct fb_info *info)
|
|
|
|
|
{
|
|
|
|
|
disp->xres_virtual = var->xres_virtual;
|
|
|
|
|
disp->yres_virtual = var->yres_virtual;
|
|
|
|
|
disp->bits_per_pixel = var->bits_per_pixel;
|
|
|
|
|
disp->grayscale = var->grayscale;
|
|
|
|
|
disp->nonstd = var->nonstd;
|
|
|
|
|
disp->accel_flags = var->accel_flags;
|
|
|
|
|
disp->height = var->height;
|
|
|
|
|
disp->width = var->width;
|
|
|
|
|
disp->red = var->red;
|
|
|
|
|
disp->green = var->green;
|
|
|
|
|
disp->blue = var->blue;
|
|
|
|
|
disp->transp = var->transp;
|
|
|
|
|
disp->rotate = var->rotate;
|
|
|
|
|
disp->mode = fb_match_mode(var, &info->modelist);
|
|
|
|
|
if (disp->mode == NULL)
|
|
|
|
|
/* This should not happen */
|
|
|
|
|
return -EINVAL;
|
|
|
|
|
return 0;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static void display_to_var(struct fb_var_screeninfo *var,
|
|
|
|
|
struct display *disp)
|
|
|
|
|
{
|
|
|
|
|
fb_videomode_to_var(var, disp->mode);
|
|
|
|
|
var->xres_virtual = disp->xres_virtual;
|
|
|
|
|
var->yres_virtual = disp->yres_virtual;
|
|
|
|
|
var->bits_per_pixel = disp->bits_per_pixel;
|
|
|
|
|
var->grayscale = disp->grayscale;
|
|
|
|
|
var->nonstd = disp->nonstd;
|
|
|
|
|
var->accel_flags = disp->accel_flags;
|
|
|
|
|
var->height = disp->height;
|
|
|
|
|
var->width = disp->width;
|
|
|
|
|
var->red = disp->red;
|
|
|
|
|
var->green = disp->green;
|
|
|
|
|
var->blue = disp->blue;
|
|
|
|
|
var->transp = disp->transp;
|
|
|
|
|
var->rotate = disp->rotate;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static const char *fbcon_startup(void)
|
|
|
|
|
{
|
|
|
|
|
const char *display_desc = "frame buffer device";
|
|
|
|
|
struct display *p = &fb_display[fg_console];
|
|
|
|
|
struct vc_data *vc = vc_cons[fg_console].d;
|
2005-09-13 15:25:44 +07:00
|
|
|
const struct font_desc *font = NULL;
|
2005-04-17 05:20:36 +07:00
|
|
|
struct module *owner;
|
|
|
|
|
struct fb_info *info = NULL;
|
|
|
|
|
struct fbcon_ops *ops;
|
|
|
|
|
int rows, cols;
|
|
|
|
|
int irqres;
|
|
|
|
|
|
|
|
|
|
irqres = 1;
|
|
|
|
|
/*
|
|
|
|
|
* If num_registered_fb is zero, this is a call for the dummy part.
|
|
|
|
|
* The frame buffer devices weren't initialized yet.
|
|
|
|
|
*/
|
|
|
|
|
if (!num_registered_fb || info_idx == -1)
|
|
|
|
|
return display_desc;
|
|
|
|
|
/*
|
|
|
|
|
* Instead of blindly using registered_fb[0], we use info_idx, set by
|
|
|
|
|
* fb_console_init();
|
|
|
|
|
*/
|
|
|
|
|
info = registered_fb[info_idx];
|
|
|
|
|
if (!info)
|
|
|
|
|
return NULL;
|
|
|
|
|
|
|
|
|
|
owner = info->fbops->owner;
|
|
|
|
|
if (!try_module_get(owner))
|
|
|
|
|
return NULL;
|
|
|
|
|
if (info->fbops->fb_open && info->fbops->fb_open(info, 0)) {
|
|
|
|
|
module_put(owner);
|
|
|
|
|
return NULL;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
ops = kmalloc(sizeof(struct fbcon_ops), GFP_KERNEL);
|
|
|
|
|
if (!ops) {
|
|
|
|
|
module_put(owner);
|
|
|
|
|
return NULL;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
memset(ops, 0, sizeof(struct fbcon_ops));
|
|
|
|
|
ops->currcon = -1;
|
|
|
|
|
ops->graphics = 1;
|
[PATCH] fbcon: Console Rotation - Prepare fbcon for console rotation
This patch series implements generic code to rotate the console at 90, 180,
and 270 degrees. The implementation is completely done in the framebuffer
console level, thus no changes to the framebuffer layer or to the drivers
are needed.
Console rotation is required by some Sharp-based devices where the natural
orientation of the display is not at 0 degrees. Also, users that have
displays that can pivot will benefit by having a console in portrait mode
if they so desire.
The choice to implement the code in the console layer rather than in the
framebuffer layer is due to the following reasons:
- it's fast
- it does not require driver changes
- it can coexist with devices that can rotate the display at the hardware level
- it complements graphics applications that can do display rotation
The changes to core fbcon are minimal-- recognition of the console
rotation angle so it can swap directions, origins and axes (xres vs yres,
xpanstep vs ypanstep, xoffset vs yoffset, etc) and storage of the rotation
angle per display. The bulk of the code that does the actual drawing to the
screen are placed in separate files. Each angle of rotation has separate
methods (bmove, clear, putcs, cursor, update_start which is derived from
update_var, and clear_margins). To mimimize processing time, the fontdata
are pre-rotated at each console switch (only if the font or the angle has
changed).
The option can be compiled out (CONFIG_FRAMEBUFFER_CONSOLE_ROTATION = n) if
rotation is not needed.
Choosing the rotation angle can be done in several ways:
1. boot option fbcon=rotate:n, where
n = 0 - normal
n = 1 - 90 degrees (clockwise)
n = 2 - 180 degrees (upside down)
n = 3 - 270 degrees (counterclockwise)
2. echo n > /sys/class/graphics/fb[num]/con_rotate
where n is the same as described above. It sets the angle of rotation
of the current console
3 echo n > /sys/class/graphics/fb[num]/con_rotate_all
where n is the same as described above. Globally sets the angle of
rotation.
GOTCHAS:
The option, especially at angles of 90 and 270 degrees, will exercise
the least used code of drivers. Namely, at these angles, panning is done
in the x-axis, so it can reveal bugs in the driver if xpanstep is set
incorrectly. A workaround is to set xpanstep = 0.
Secondly, at these angles, the framebuffer memory access can be
unaligned if (fontheight * bpp) % 32 ~= 0 which can reveal bugs in the drivers
imageblit, fillrect and copyarea functions. (I think cfbfillrect may have
this buglet). A workaround is to use a standard 8x16 font.
Speed:
The scrolling speed difference between 0 and 180 degrees is minimal,
somewhere areound 1-2%. At 90 or 270 degress, speed drops down to a vicinity
of 30-40%. This is understandable because the blit direction is across the
framebuffer "direction." Scrolling will be helped at these angles if xpanstep
is not equal to zero, use of 8x16 fonts, and setting xres_virtual >= xres * 2.
Note: The code is tested on little-endian only, so I don't know if it will
work in big-endian. Please let me know, it will take only less than a minute
of your time.
This patch prepares fbcon for console rotation and contains the following
changes:
- add rotate field in struct fbcon_ops to keep fbcon's current rotation
angle
- add con_rotate field in struct display to store per-display rotation angle
- create a private copy of the current var to fbcon. This will prevent
fbcon from directly manipulating info->var, especially the fields xoffset,
yoffset and vmode.
- add ability to swap pertinent axes (xres, yres; xpanstep, ypanstep; etc)
depending on the rotation angle
- change global update_var() (function that sets the screen start address)
as an fbcon method update_start. This is required because the axes, start
offset, and/or direction can be reversed depending on the rotation angle.
- add fbcon method rotate_font() which will rotate each character bitmap to
the correct angle of rotation.
- add fbcon boot option 'rotate' to select the angle of rotation at bootime.
Currently does nothing until all patches are applied.
Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-11-09 12:39:09 +07:00
|
|
|
ops->cur_rotate = -1;
|
2005-04-17 05:20:36 +07:00
|
|
|
info->fbcon_par = ops;
|
[PATCH] fbcon: Console Rotation - Prepare fbcon for console rotation
This patch series implements generic code to rotate the console at 90, 180,
and 270 degrees. The implementation is completely done in the framebuffer
console level, thus no changes to the framebuffer layer or to the drivers
are needed.
Console rotation is required by some Sharp-based devices where the natural
orientation of the display is not at 0 degrees. Also, users that have
displays that can pivot will benefit by having a console in portrait mode
if they so desire.
The choice to implement the code in the console layer rather than in the
framebuffer layer is due to the following reasons:
- it's fast
- it does not require driver changes
- it can coexist with devices that can rotate the display at the hardware level
- it complements graphics applications that can do display rotation
The changes to core fbcon are minimal-- recognition of the console
rotation angle so it can swap directions, origins and axes (xres vs yres,
xpanstep vs ypanstep, xoffset vs yoffset, etc) and storage of the rotation
angle per display. The bulk of the code that does the actual drawing to the
screen are placed in separate files. Each angle of rotation has separate
methods (bmove, clear, putcs, cursor, update_start which is derived from
update_var, and clear_margins). To mimimize processing time, the fontdata
are pre-rotated at each console switch (only if the font or the angle has
changed).
The option can be compiled out (CONFIG_FRAMEBUFFER_CONSOLE_ROTATION = n) if
rotation is not needed.
Choosing the rotation angle can be done in several ways:
1. boot option fbcon=rotate:n, where
n = 0 - normal
n = 1 - 90 degrees (clockwise)
n = 2 - 180 degrees (upside down)
n = 3 - 270 degrees (counterclockwise)
2. echo n > /sys/class/graphics/fb[num]/con_rotate
where n is the same as described above. It sets the angle of rotation
of the current console
3 echo n > /sys/class/graphics/fb[num]/con_rotate_all
where n is the same as described above. Globally sets the angle of
rotation.
GOTCHAS:
The option, especially at angles of 90 and 270 degrees, will exercise
the least used code of drivers. Namely, at these angles, panning is done
in the x-axis, so it can reveal bugs in the driver if xpanstep is set
incorrectly. A workaround is to set xpanstep = 0.
Secondly, at these angles, the framebuffer memory access can be
unaligned if (fontheight * bpp) % 32 ~= 0 which can reveal bugs in the drivers
imageblit, fillrect and copyarea functions. (I think cfbfillrect may have
this buglet). A workaround is to use a standard 8x16 font.
Speed:
The scrolling speed difference between 0 and 180 degrees is minimal,
somewhere areound 1-2%. At 90 or 270 degress, speed drops down to a vicinity
of 30-40%. This is understandable because the blit direction is across the
framebuffer "direction." Scrolling will be helped at these angles if xpanstep
is not equal to zero, use of 8x16 fonts, and setting xres_virtual >= xres * 2.
Note: The code is tested on little-endian only, so I don't know if it will
work in big-endian. Please let me know, it will take only less than a minute
of your time.
This patch prepares fbcon for console rotation and contains the following
changes:
- add rotate field in struct fbcon_ops to keep fbcon's current rotation
angle
- add con_rotate field in struct display to store per-display rotation angle
- create a private copy of the current var to fbcon. This will prevent
fbcon from directly manipulating info->var, especially the fields xoffset,
yoffset and vmode.
- add ability to swap pertinent axes (xres, yres; xpanstep, ypanstep; etc)
depending on the rotation angle
- change global update_var() (function that sets the screen start address)
as an fbcon method update_start. This is required because the axes, start
offset, and/or direction can be reversed depending on the rotation angle.
- add fbcon method rotate_font() which will rotate each character bitmap to
the correct angle of rotation.
- add fbcon boot option 'rotate' to select the angle of rotation at bootime.
Currently does nothing until all patches are applied.
Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-11-09 12:39:09 +07:00
|
|
|
p->con_rotate = rotate;
|
2005-04-17 05:20:36 +07:00
|
|
|
set_blitting_type(vc, info, NULL);
|
|
|
|
|
|
|
|
|
|
if (info->fix.type != FB_TYPE_TEXT) {
|
|
|
|
|
if (fbcon_softback_size) {
|
|
|
|
|
if (!softback_buf) {
|
|
|
|
|
softback_buf =
|
|
|
|
|
(unsigned long)
|
|
|
|
|
kmalloc(fbcon_softback_size,
|
|
|
|
|
GFP_KERNEL);
|
|
|
|
|
if (!softback_buf) {
|
|
|
|
|
fbcon_softback_size = 0;
|
|
|
|
|
softback_top = 0;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
} else {
|
|
|
|
|
if (softback_buf) {
|
|
|
|
|
kfree((void *) softback_buf);
|
|
|
|
|
softback_buf = 0;
|
|
|
|
|
softback_top = 0;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
if (softback_buf)
|
|
|
|
|
softback_in = softback_top = softback_curr =
|
|
|
|
|
softback_buf;
|
|
|
|
|
softback_lines = 0;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* Setup default font */
|
|
|
|
|
if (!p->fontdata) {
|
|
|
|
|
if (!fontname[0] || !(font = find_font(fontname)))
|
|
|
|
|
font = get_default_font(info->var.xres,
|
|
|
|
|
info->var.yres);
|
|
|
|
|
vc->vc_font.width = font->width;
|
|
|
|
|
vc->vc_font.height = font->height;
|
2005-09-13 15:25:44 +07:00
|
|
|
vc->vc_font.data = (void *)(p->fontdata = font->data);
|
2005-04-17 05:20:36 +07:00
|
|
|
vc->vc_font.charcount = 256; /* FIXME Need to support more fonts */
|
|
|
|
|
}
|
|
|
|
|
|
[PATCH] fbcon: Console Rotation - Prepare fbcon for console rotation
This patch series implements generic code to rotate the console at 90, 180,
and 270 degrees. The implementation is completely done in the framebuffer
console level, thus no changes to the framebuffer layer or to the drivers
are needed.
Console rotation is required by some Sharp-based devices where the natural
orientation of the display is not at 0 degrees. Also, users that have
displays that can pivot will benefit by having a console in portrait mode
if they so desire.
The choice to implement the code in the console layer rather than in the
framebuffer layer is due to the following reasons:
- it's fast
- it does not require driver changes
- it can coexist with devices that can rotate the display at the hardware level
- it complements graphics applications that can do display rotation
The changes to core fbcon are minimal-- recognition of the console
rotation angle so it can swap directions, origins and axes (xres vs yres,
xpanstep vs ypanstep, xoffset vs yoffset, etc) and storage of the rotation
angle per display. The bulk of the code that does the actual drawing to the
screen are placed in separate files. Each angle of rotation has separate
methods (bmove, clear, putcs, cursor, update_start which is derived from
update_var, and clear_margins). To mimimize processing time, the fontdata
are pre-rotated at each console switch (only if the font or the angle has
changed).
The option can be compiled out (CONFIG_FRAMEBUFFER_CONSOLE_ROTATION = n) if
rotation is not needed.
Choosing the rotation angle can be done in several ways:
1. boot option fbcon=rotate:n, where
n = 0 - normal
n = 1 - 90 degrees (clockwise)
n = 2 - 180 degrees (upside down)
n = 3 - 270 degrees (counterclockwise)
2. echo n > /sys/class/graphics/fb[num]/con_rotate
where n is the same as described above. It sets the angle of rotation
of the current console
3 echo n > /sys/class/graphics/fb[num]/con_rotate_all
where n is the same as described above. Globally sets the angle of
rotation.
GOTCHAS:
The option, especially at angles of 90 and 270 degrees, will exercise
the least used code of drivers. Namely, at these angles, panning is done
in the x-axis, so it can reveal bugs in the driver if xpanstep is set
incorrectly. A workaround is to set xpanstep = 0.
Secondly, at these angles, the framebuffer memory access can be
unaligned if (fontheight * bpp) % 32 ~= 0 which can reveal bugs in the drivers
imageblit, fillrect and copyarea functions. (I think cfbfillrect may have
this buglet). A workaround is to use a standard 8x16 font.
Speed:
The scrolling speed difference between 0 and 180 degrees is minimal,
somewhere areound 1-2%. At 90 or 270 degress, speed drops down to a vicinity
of 30-40%. This is understandable because the blit direction is across the
framebuffer "direction." Scrolling will be helped at these angles if xpanstep
is not equal to zero, use of 8x16 fonts, and setting xres_virtual >= xres * 2.
Note: The code is tested on little-endian only, so I don't know if it will
work in big-endian. Please let me know, it will take only less than a minute
of your time.
This patch prepares fbcon for console rotation and contains the following
changes:
- add rotate field in struct fbcon_ops to keep fbcon's current rotation
angle
- add con_rotate field in struct display to store per-display rotation angle
- create a private copy of the current var to fbcon. This will prevent
fbcon from directly manipulating info->var, especially the fields xoffset,
yoffset and vmode.
- add ability to swap pertinent axes (xres, yres; xpanstep, ypanstep; etc)
depending on the rotation angle
- change global update_var() (function that sets the screen start address)
as an fbcon method update_start. This is required because the axes, start
offset, and/or direction can be reversed depending on the rotation angle.
- add fbcon method rotate_font() which will rotate each character bitmap to
the correct angle of rotation.
- add fbcon boot option 'rotate' to select the angle of rotation at bootime.
Currently does nothing until all patches are applied.
Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-11-09 12:39:09 +07:00
|
|
|
cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
|
|
|
|
|
rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
|
|
|
|
|
cols /= vc->vc_font.width;
|
|
|
|
|
rows /= vc->vc_font.height;
|
2005-04-17 05:20:36 +07:00
|
|
|
vc_resize(vc, cols, rows);
|
|
|
|
|
|
|
|
|
|
DPRINTK("mode: %s\n", info->fix.id);
|
|
|
|
|
DPRINTK("visual: %d\n", info->fix.visual);
|
|
|
|
|
DPRINTK("res: %dx%d-%d\n", info->var.xres,
|
|
|
|
|
info->var.yres,
|
|
|
|
|
info->var.bits_per_pixel);
|
|
|
|
|
|
|
|
|
|
#ifdef CONFIG_ATARI
|
|
|
|
|
if (MACH_IS_ATARI) {
|
|
|
|
|
cursor_blink_rate = ATARI_CURSOR_BLINK_RATE;
|
|
|
|
|
irqres =
|
|
|
|
|
request_irq(IRQ_AUTO_4, fb_vbl_handler,
|
|
|
|
|
IRQ_TYPE_PRIO, "framebuffer vbl",
|
|
|
|
|
info);
|
|
|
|
|
}
|
|
|
|
|
#endif /* CONFIG_ATARI */
|
|
|
|
|
|
|
|
|
|
#ifdef CONFIG_MAC
|
|
|
|
|
/*
|
|
|
|
|
* On a Macintoy, the VBL interrupt may or may not be active.
|
|
|
|
|
* As interrupt based cursor is more reliable and race free, we
|
|
|
|
|
* probe for VBL interrupts.
|
|
|
|
|
*/
|
|
|
|
|
if (MACH_IS_MAC) {
|
|
|
|
|
int ct = 0;
|
|
|
|
|
/*
|
|
|
|
|
* Probe for VBL: set temp. handler ...
|
|
|
|
|
*/
|
|
|
|
|
irqres = request_irq(IRQ_MAC_VBL, fb_vbl_detect, 0,
|
|
|
|
|
"framebuffer vbl", info);
|
|
|
|
|
vbl_detected = 0;
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* ... and spin for 20 ms ...
|
|
|
|
|
*/
|
|
|
|
|
while (!vbl_detected && ++ct < 1000)
|
|
|
|
|
udelay(20);
|
|
|
|
|
|
|
|
|
|
if (ct == 1000)
|
|
|
|
|
printk
|
|
|
|
|
("fbcon_startup: No VBL detected, using timer based cursor.\n");
|
|
|
|
|
|
|
|
|
|
free_irq(IRQ_MAC_VBL, fb_vbl_detect);
|
|
|
|
|
|
|
|
|
|
if (vbl_detected) {
|
|
|
|
|
/*
|
|
|
|
|
* interrupt based cursor ok
|
|
|
|
|
*/
|
|
|
|
|
cursor_blink_rate = MAC_CURSOR_BLINK_RATE;
|
|
|
|
|
irqres =
|
|
|
|
|
request_irq(IRQ_MAC_VBL, fb_vbl_handler, 0,
|
|
|
|
|
"framebuffer vbl", info);
|
|
|
|
|
} else {
|
|
|
|
|
/*
|
|
|
|
|
* VBL not detected: fall through, use timer based cursor
|
|
|
|
|
*/
|
|
|
|
|
irqres = 1;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
#endif /* CONFIG_MAC */
|
|
|
|
|
|
2005-09-10 03:10:00 +07:00
|
|
|
fbcon_add_cursor_timer(info);
|
2005-04-17 05:20:36 +07:00
|
|
|
return display_desc;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static void fbcon_init(struct vc_data *vc, int init)
|
|
|
|
|
{
|
|
|
|
|
struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
|
|
|
|
|
struct fbcon_ops *ops;
|
|
|
|
|
struct vc_data **default_mode = vc->vc_display_fg;
|
|
|
|
|
struct vc_data *svc = *default_mode;
|
|
|
|
|
struct display *t, *p = &fb_display[vc->vc_num];
|
|
|
|
|
int logo = 1, new_rows, new_cols, rows, cols, charcnt = 256;
|
2005-05-01 22:59:23 +07:00
|
|
|
int cap;
|
2005-04-17 05:20:36 +07:00
|
|
|
|
|
|
|
|
if (info_idx == -1 || info == NULL)
|
|
|
|
|
return;
|
2005-05-01 22:59:23 +07:00
|
|
|
|
|
|
|
|
cap = info->flags;
|
|
|
|
|
|
2005-04-17 05:20:36 +07:00
|
|
|
if (vc != svc || logo_shown == FBCON_LOGO_DONTSHOW ||
|
|
|
|
|
(info->fix.type == FB_TYPE_TEXT))
|
|
|
|
|
logo = 0;
|
|
|
|
|
|
|
|
|
|
if (var_to_display(p, &info->var, info))
|
|
|
|
|
return;
|
|
|
|
|
|
|
|
|
|
/* If we are not the first console on this
|
|
|
|
|
fb, copy the font from that console */
|
|
|
|
|
t = &fb_display[svc->vc_num];
|
|
|
|
|
if (!vc->vc_font.data) {
|
2005-09-13 15:25:44 +07:00
|
|
|
vc->vc_font.data = (void *)(p->fontdata = t->fontdata);
|
2005-04-17 05:20:36 +07:00
|
|
|
vc->vc_font.width = (*default_mode)->vc_font.width;
|
|
|
|
|
vc->vc_font.height = (*default_mode)->vc_font.height;
|
|
|
|
|
p->userfont = t->userfont;
|
|
|
|
|
if (p->userfont)
|
|
|
|
|
REFCOUNT(p->fontdata)++;
|
|
|
|
|
}
|
|
|
|
|
if (p->userfont)
|
|
|
|
|
charcnt = FNTCHARCNT(p->fontdata);
|
2005-09-10 03:04:37 +07:00
|
|
|
vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
|
2005-04-17 05:20:36 +07:00
|
|
|
vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
|
|
|
|
|
if (charcnt == 256) {
|
|
|
|
|
vc->vc_hi_font_mask = 0;
|
|
|
|
|
} else {
|
|
|
|
|
vc->vc_hi_font_mask = 0x100;
|
|
|
|
|
if (vc->vc_can_do_color)
|
|
|
|
|
vc->vc_complement_mask <<= 1;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if (!*svc->vc_uni_pagedir_loc)
|
|
|
|
|
con_set_default_unimap(svc);
|
|
|
|
|
if (!*vc->vc_uni_pagedir_loc)
|
|
|
|
|
con_copy_unimap(vc, svc);
|
|
|
|
|
|
[PATCH] fbcon: Console Rotation - Prepare fbcon for console rotation
This patch series implements generic code to rotate the console at 90, 180,
and 270 degrees. The implementation is completely done in the framebuffer
console level, thus no changes to the framebuffer layer or to the drivers
are needed.
Console rotation is required by some Sharp-based devices where the natural
orientation of the display is not at 0 degrees. Also, users that have
displays that can pivot will benefit by having a console in portrait mode
if they so desire.
The choice to implement the code in the console layer rather than in the
framebuffer layer is due to the following reasons:
- it's fast
- it does not require driver changes
- it can coexist with devices that can rotate the display at the hardware level
- it complements graphics applications that can do display rotation
The changes to core fbcon are minimal-- recognition of the console
rotation angle so it can swap directions, origins and axes (xres vs yres,
xpanstep vs ypanstep, xoffset vs yoffset, etc) and storage of the rotation
angle per display. The bulk of the code that does the actual drawing to the
screen are placed in separate files. Each angle of rotation has separate
methods (bmove, clear, putcs, cursor, update_start which is derived from
update_var, and clear_margins). To mimimize processing time, the fontdata
are pre-rotated at each console switch (only if the font or the angle has
changed).
The option can be compiled out (CONFIG_FRAMEBUFFER_CONSOLE_ROTATION = n) if
rotation is not needed.
Choosing the rotation angle can be done in several ways:
1. boot option fbcon=rotate:n, where
n = 0 - normal
n = 1 - 90 degrees (clockwise)
n = 2 - 180 degrees (upside down)
n = 3 - 270 degrees (counterclockwise)
2. echo n > /sys/class/graphics/fb[num]/con_rotate
where n is the same as described above. It sets the angle of rotation
of the current console
3 echo n > /sys/class/graphics/fb[num]/con_rotate_all
where n is the same as described above. Globally sets the angle of
rotation.
GOTCHAS:
The option, especially at angles of 90 and 270 degrees, will exercise
the least used code of drivers. Namely, at these angles, panning is done
in the x-axis, so it can reveal bugs in the driver if xpanstep is set
incorrectly. A workaround is to set xpanstep = 0.
Secondly, at these angles, the framebuffer memory access can be
unaligned if (fontheight * bpp) % 32 ~= 0 which can reveal bugs in the drivers
imageblit, fillrect and copyarea functions. (I think cfbfillrect may have
this buglet). A workaround is to use a standard 8x16 font.
Speed:
The scrolling speed difference between 0 and 180 degrees is minimal,
somewhere areound 1-2%. At 90 or 270 degress, speed drops down to a vicinity
of 30-40%. This is understandable because the blit direction is across the
framebuffer "direction." Scrolling will be helped at these angles if xpanstep
is not equal to zero, use of 8x16 fonts, and setting xres_virtual >= xres * 2.
Note: The code is tested on little-endian only, so I don't know if it will
work in big-endian. Please let me know, it will take only less than a minute
of your time.
This patch prepares fbcon for console rotation and contains the following
changes:
- add rotate field in struct fbcon_ops to keep fbcon's current rotation
angle
- add con_rotate field in struct display to store per-display rotation angle
- create a private copy of the current var to fbcon. This will prevent
fbcon from directly manipulating info->var, especially the fields xoffset,
yoffset and vmode.
- add ability to swap pertinent axes (xres, yres; xpanstep, ypanstep; etc)
depending on the rotation angle
- change global update_var() (function that sets the screen start address)
as an fbcon method update_start. This is required because the axes, start
offset, and/or direction can be reversed depending on the rotation angle.
- add fbcon method rotate_font() which will rotate each character bitmap to
the correct angle of rotation.
- add fbcon boot option 'rotate' to select the angle of rotation at bootime.
Currently does nothing until all patches are applied.
Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-11-09 12:39:09 +07:00
|
|
|
ops = info->fbcon_par;
|
|
|
|
|
p->con_rotate = rotate;
|
|
|
|
|
set_blitting_type(vc, info, NULL);
|
|
|
|
|
|
2005-04-17 05:20:36 +07:00
|
|
|
cols = vc->vc_cols;
|
|
|
|
|
rows = vc->vc_rows;
|
[PATCH] fbcon: Console Rotation - Prepare fbcon for console rotation
This patch series implements generic code to rotate the console at 90, 180,
and 270 degrees. The implementation is completely done in the framebuffer
console level, thus no changes to the framebuffer layer or to the drivers
are needed.
Console rotation is required by some Sharp-based devices where the natural
orientation of the display is not at 0 degrees. Also, users that have
displays that can pivot will benefit by having a console in portrait mode
if they so desire.
The choice to implement the code in the console layer rather than in the
framebuffer layer is due to the following reasons:
- it's fast
- it does not require driver changes
- it can coexist with devices that can rotate the display at the hardware level
- it complements graphics applications that can do display rotation
The changes to core fbcon are minimal-- recognition of the console
rotation angle so it can swap directions, origins and axes (xres vs yres,
xpanstep vs ypanstep, xoffset vs yoffset, etc) and storage of the rotation
angle per display. The bulk of the code that does the actual drawing to the
screen are placed in separate files. Each angle of rotation has separate
methods (bmove, clear, putcs, cursor, update_start which is derived from
update_var, and clear_margins). To mimimize processing time, the fontdata
are pre-rotated at each console switch (only if the font or the angle has
changed).
The option can be compiled out (CONFIG_FRAMEBUFFER_CONSOLE_ROTATION = n) if
rotation is not needed.
Choosing the rotation angle can be done in several ways:
1. boot option fbcon=rotate:n, where
n = 0 - normal
n = 1 - 90 degrees (clockwise)
n = 2 - 180 degrees (upside down)
n = 3 - 270 degrees (counterclockwise)
2. echo n > /sys/class/graphics/fb[num]/con_rotate
where n is the same as described above. It sets the angle of rotation
of the current console
3 echo n > /sys/class/graphics/fb[num]/con_rotate_all
where n is the same as described above. Globally sets the angle of
rotation.
GOTCHAS:
The option, especially at angles of 90 and 270 degrees, will exercise
the least used code of drivers. Namely, at these angles, panning is done
in the x-axis, so it can reveal bugs in the driver if xpanstep is set
incorrectly. A workaround is to set xpanstep = 0.
Secondly, at these angles, the framebuffer memory access can be
unaligned if (fontheight * bpp) % 32 ~= 0 which can reveal bugs in the drivers
imageblit, fillrect and copyarea functions. (I think cfbfillrect may have
this buglet). A workaround is to use a standard 8x16 font.
Speed:
The scrolling speed difference between 0 and 180 degrees is minimal,
somewhere areound 1-2%. At 90 or 270 degress, speed drops down to a vicinity
of 30-40%. This is understandable because the blit direction is across the
framebuffer "direction." Scrolling will be helped at these angles if xpanstep
is not equal to zero, use of 8x16 fonts, and setting xres_virtual >= xres * 2.
Note: The code is tested on little-endian only, so I don't know if it will
work in big-endian. Please let me know, it will take only less than a minute
of your time.
This patch prepares fbcon for console rotation and contains the following
changes:
- add rotate field in struct fbcon_ops to keep fbcon's current rotation
angle
- add con_rotate field in struct display to store per-display rotation angle
- create a private copy of the current var to fbcon. This will prevent
fbcon from directly manipulating info->var, especially the fields xoffset,
yoffset and vmode.
- add ability to swap pertinent axes (xres, yres; xpanstep, ypanstep; etc)
depending on the rotation angle
- change global update_var() (function that sets the screen start address)
as an fbcon method update_start. This is required because the axes, start
offset, and/or direction can be reversed depending on the rotation angle.
- add fbcon method rotate_font() which will rotate each character bitmap to
the correct angle of rotation.
- add fbcon boot option 'rotate' to select the angle of rotation at bootime.
Currently does nothing until all patches are applied.
Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-11-09 12:39:09 +07:00
|
|
|
new_cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
|
|
|
|
|
new_rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
|
|
|
|
|
new_cols /= vc->vc_font.width;
|
|
|
|
|
new_rows /= vc->vc_font.height;
|
2005-04-17 05:20:36 +07:00
|
|
|
vc_resize(vc, new_cols, new_rows);
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* We must always set the mode. The mode of the previous console
|
|
|
|
|
* driver could be in the same resolution but we are using different
|
|
|
|
|
* hardware so we have to initialize the hardware.
|
|
|
|
|
*
|
|
|
|
|
* We need to do it in fbcon_init() to prevent screen corruption.
|
|
|
|
|
*/
|
|
|
|
|
if (CON_IS_VISIBLE(vc)) {
|
|
|
|
|
if (info->fbops->fb_set_par &&
|
|
|
|
|
!(ops->flags & FBCON_FLAGS_INIT))
|
|
|
|
|
info->fbops->fb_set_par(info);
|
|
|
|
|
ops->flags |= FBCON_FLAGS_INIT;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
ops->graphics = 0;
|
|
|
|
|
|
|
|
|
|
if ((cap & FBINFO_HWACCEL_COPYAREA) &&
|
|
|
|
|
!(cap & FBINFO_HWACCEL_DISABLED))
|
|
|
|
|
p->scrollmode = SCROLL_MOVE;
|
|
|
|
|
else /* default to something safe */
|
|
|
|
|
p->scrollmode = SCROLL_REDRAW;
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* ++guenther: console.c:vc_allocate() relies on initializing
|
|
|
|
|
* vc_{cols,rows}, but we must not set those if we are only
|
|
|
|
|
* resizing the console.
|
|
|
|
|
*/
|
|
|
|
|
if (!init) {
|
|
|
|
|
vc->vc_cols = new_cols;
|
|
|
|
|
vc->vc_rows = new_rows;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if (logo)
|
|
|
|
|
fbcon_prepare_logo(vc, info, cols, rows, new_cols, new_rows);
|
|
|
|
|
|
2005-11-07 16:00:36 +07:00
|
|
|
if (vc == svc && softback_buf)
|
|
|
|
|
fbcon_update_softback(vc);
|
[PATCH] fbcon: Console Rotation - Prepare fbcon for console rotation
This patch series implements generic code to rotate the console at 90, 180,
and 270 degrees. The implementation is completely done in the framebuffer
console level, thus no changes to the framebuffer layer or to the drivers
are needed.
Console rotation is required by some Sharp-based devices where the natural
orientation of the display is not at 0 degrees. Also, users that have
displays that can pivot will benefit by having a console in portrait mode
if they so desire.
The choice to implement the code in the console layer rather than in the
framebuffer layer is due to the following reasons:
- it's fast
- it does not require driver changes
- it can coexist with devices that can rotate the display at the hardware level
- it complements graphics applications that can do display rotation
The changes to core fbcon are minimal-- recognition of the console
rotation angle so it can swap directions, origins and axes (xres vs yres,
xpanstep vs ypanstep, xoffset vs yoffset, etc) and storage of the rotation
angle per display. The bulk of the code that does the actual drawing to the
screen are placed in separate files. Each angle of rotation has separate
methods (bmove, clear, putcs, cursor, update_start which is derived from
update_var, and clear_margins). To mimimize processing time, the fontdata
are pre-rotated at each console switch (only if the font or the angle has
changed).
The option can be compiled out (CONFIG_FRAMEBUFFER_CONSOLE_ROTATION = n) if
rotation is not needed.
Choosing the rotation angle can be done in several ways:
1. boot option fbcon=rotate:n, where
n = 0 - normal
n = 1 - 90 degrees (clockwise)
n = 2 - 180 degrees (upside down)
n = 3 - 270 degrees (counterclockwise)
2. echo n > /sys/class/graphics/fb[num]/con_rotate
where n is the same as described above. It sets the angle of rotation
of the current console
3 echo n > /sys/class/graphics/fb[num]/con_rotate_all
where n is the same as described above. Globally sets the angle of
rotation.
GOTCHAS:
The option, especially at angles of 90 and 270 degrees, will exercise
the least used code of drivers. Namely, at these angles, panning is done
in the x-axis, so it can reveal bugs in the driver if xpanstep is set
incorrectly. A workaround is to set xpanstep = 0.
Secondly, at these angles, the framebuffer memory access can be
unaligned if (fontheight * bpp) % 32 ~= 0 which can reveal bugs in the drivers
imageblit, fillrect and copyarea functions. (I think cfbfillrect may have
this buglet). A workaround is to use a standard 8x16 font.
Speed:
The scrolling speed difference between 0 and 180 degrees is minimal,
somewhere areound 1-2%. At 90 or 270 degress, speed drops down to a vicinity
of 30-40%. This is understandable because the blit direction is across the
framebuffer "direction." Scrolling will be helped at these angles if xpanstep
is not equal to zero, use of 8x16 fonts, and setting xres_virtual >= xres * 2.
Note: The code is tested on little-endian only, so I don't know if it will
work in big-endian. Please let me know, it will take only less than a minute
of your time.
This patch prepares fbcon for console rotation and contains the following
changes:
- add rotate field in struct fbcon_ops to keep fbcon's current rotation
angle
- add con_rotate field in struct display to store per-display rotation angle
- create a private copy of the current var to fbcon. This will prevent
fbcon from directly manipulating info->var, especially the fields xoffset,
yoffset and vmode.
- add ability to swap pertinent axes (xres, yres; xpanstep, ypanstep; etc)
depending on the rotation angle
- change global update_var() (function that sets the screen start address)
as an fbcon method update_start. This is required because the axes, start
offset, and/or direction can be reversed depending on the rotation angle.
- add fbcon method rotate_font() which will rotate each character bitmap to
the correct angle of rotation.
- add fbcon boot option 'rotate' to select the angle of rotation at bootime.
Currently does nothing until all patches are applied.
Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-11-09 12:39:09 +07:00
|
|
|
|
|
|
|
|
if (ops->rotate_font && ops->rotate_font(info, vc, p)) {
|
|
|
|
|
ops->rotate = FB_ROTATE_UR;
|
|
|
|
|
set_blitting_type(vc, info, p);
|
|
|
|
|
}
|
|
|
|
|
|
2005-04-17 05:20:36 +07:00
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static void fbcon_deinit(struct vc_data *vc)
|
|
|
|
|
{
|
|
|
|
|
struct display *p = &fb_display[vc->vc_num];
|
|
|
|
|
|
|
|
|
|
if (info_idx != -1)
|
|
|
|
|
return;
|
|
|
|
|
fbcon_free_font(p);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* ====================================================================== */
|
|
|
|
|
|
|
|
|
|
/* fbcon_XXX routines - interface used by the world
|
|
|
|
|
*
|
|
|
|
|
* This system is now divided into two levels because of complications
|
|
|
|
|
* caused by hardware scrolling. Top level functions:
|
|
|
|
|
*
|
|
|
|
|
* fbcon_bmove(), fbcon_clear(), fbcon_putc(), fbcon_clear_margins()
|
|
|
|
|
*
|
|
|
|
|
* handles y values in range [0, scr_height-1] that correspond to real
|
|
|
|
|
* screen positions. y_wrap shift means that first line of bitmap may be
|
|
|
|
|
* anywhere on this display. These functions convert lineoffsets to
|
|
|
|
|
* bitmap offsets and deal with the wrap-around case by splitting blits.
|
|
|
|
|
*
|
|
|
|
|
* fbcon_bmove_physical_8() -- These functions fast implementations
|
|
|
|
|
* fbcon_clear_physical_8() -- of original fbcon_XXX fns.
|
|
|
|
|
* fbcon_putc_physical_8() -- (font width != 8) may be added later
|
|
|
|
|
*
|
|
|
|
|
* WARNING:
|
|
|
|
|
*
|
|
|
|
|
* At the moment fbcon_putc() cannot blit across vertical wrap boundary
|
|
|
|
|
* Implies should only really hardware scroll in rows. Only reason for
|
|
|
|
|
* restriction is simplicity & efficiency at the moment.
|
|
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
static void fbcon_clear(struct vc_data *vc, int sy, int sx, int height,
|
|
|
|
|
int width)
|
|
|
|
|
{
|
|
|
|
|
struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
|
|
|
|
|
struct fbcon_ops *ops = info->fbcon_par;
|
|
|
|
|
|
|
|
|
|
struct display *p = &fb_display[vc->vc_num];
|
|
|
|
|
u_int y_break;
|
|
|
|
|
|
|
|
|
|
if (fbcon_is_inactive(vc, info))
|
|
|
|
|
return;
|
|
|
|
|
|
|
|
|
|
if (!height || !width)
|
|
|
|
|
return;
|
|
|
|
|
|
|
|
|
|
/* Split blits that cross physical y_wrap boundary */
|
|
|
|
|
|
|
|
|
|
y_break = p->vrows - p->yscroll;
|
|
|
|
|
if (sy < y_break && sy + height - 1 >= y_break) {
|
|
|
|
|
u_int b = y_break - sy;
|
|
|
|
|
ops->clear(vc, info, real_y(p, sy), sx, b, width);
|
|
|
|
|
ops->clear(vc, info, real_y(p, sy + b), sx, height - b,
|
|
|
|
|
width);
|
|
|
|
|
} else
|
|
|
|
|
ops->clear(vc, info, real_y(p, sy), sx, height, width);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static void fbcon_putcs(struct vc_data *vc, const unsigned short *s,
|
|
|
|
|
int count, int ypos, int xpos)
|
|
|
|
|
{
|
|
|
|
|
struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
|
|
|
|
|
struct display *p = &fb_display[vc->vc_num];
|
|
|
|
|
struct fbcon_ops *ops = info->fbcon_par;
|
|
|
|
|
|
|
|
|
|
if (!fbcon_is_inactive(vc, info))
|
|
|
|
|
ops->putcs(vc, info, s, count, real_y(p, ypos), xpos,
|
|
|
|
|
get_color(vc, info, scr_readw(s), 1),
|
|
|
|
|
get_color(vc, info, scr_readw(s), 0));
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static void fbcon_putc(struct vc_data *vc, int c, int ypos, int xpos)
|
|
|
|
|
{
|
|
|
|
|
unsigned short chr;
|
|
|
|
|
|
|
|
|
|
scr_writew(c, &chr);
|
|
|
|
|
fbcon_putcs(vc, &chr, 1, ypos, xpos);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static void fbcon_clear_margins(struct vc_data *vc, int bottom_only)
|
|
|
|
|
{
|
|
|
|
|
struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
|
|
|
|
|
struct fbcon_ops *ops = info->fbcon_par;
|
|
|
|
|
|
|
|
|
|
if (!fbcon_is_inactive(vc, info))
|
|
|
|
|
ops->clear_margins(vc, info, bottom_only);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static void fbcon_cursor(struct vc_data *vc, int mode)
|
|
|
|
|
{
|
|
|
|
|
struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
|
|
|
|
|
struct fbcon_ops *ops = info->fbcon_par;
|
|
|
|
|
struct display *p = &fb_display[vc->vc_num];
|
|
|
|
|
int y;
|
|
|
|
|
int c = scr_readw((u16 *) vc->vc_pos);
|
|
|
|
|
|
|
|
|
|
if (fbcon_is_inactive(vc, info))
|
|
|
|
|
return;
|
|
|
|
|
|
|
|
|
|
ops->cursor_flash = (mode == CM_ERASE) ? 0 : 1;
|
|
|
|
|
if (mode & CM_SOFTBACK) {
|
|
|
|
|
mode &= ~CM_SOFTBACK;
|
|
|
|
|
y = softback_lines;
|
|
|
|
|
} else {
|
|
|
|
|
if (softback_lines)
|
|
|
|
|
fbcon_set_origin(vc);
|
|
|
|
|
y = 0;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
ops->cursor(vc, info, p, mode, y, get_color(vc, info, c, 1),
|
|
|
|
|
get_color(vc, info, c, 0));
|
|
|
|
|
vbl_cursor_cnt = CURSOR_DRAW_DELAY;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static int scrollback_phys_max = 0;
|
|
|
|
|
static int scrollback_max = 0;
|
|
|
|
|
static int scrollback_current = 0;
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* If no vc is existent yet, just set struct display
|
|
|
|
|
*/
|
|
|
|
|
static void fbcon_preset_disp(struct fb_info *info, struct fb_var_screeninfo *var,
|
|
|
|
|
int unit)
|
|
|
|
|
{
|
|
|
|
|
struct display *p = &fb_display[unit];
|
|
|
|
|
struct display *t = &fb_display[fg_console];
|
|
|
|
|
|
|
|
|
|
if (var_to_display(p, var, info))
|
|
|
|
|
return;
|
|
|
|
|
|
|
|
|
|
p->fontdata = t->fontdata;
|
|
|
|
|
p->userfont = t->userfont;
|
|
|
|
|
if (p->userfont)
|
|
|
|
|
REFCOUNT(p->fontdata)++;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static void fbcon_set_disp(struct fb_info *info, struct fb_var_screeninfo *var,
|
|
|
|
|
struct vc_data *vc)
|
|
|
|
|
{
|
|
|
|
|
struct display *p = &fb_display[vc->vc_num], *t;
|
|
|
|
|
struct vc_data **default_mode = vc->vc_display_fg;
|
|
|
|
|
struct vc_data *svc = *default_mode;
|
[PATCH] fbcon: Console Rotation - Prepare fbcon for console rotation
This patch series implements generic code to rotate the console at 90, 180,
and 270 degrees. The implementation is completely done in the framebuffer
console level, thus no changes to the framebuffer layer or to the drivers
are needed.
Console rotation is required by some Sharp-based devices where the natural
orientation of the display is not at 0 degrees. Also, users that have
displays that can pivot will benefit by having a console in portrait mode
if they so desire.
The choice to implement the code in the console layer rather than in the
framebuffer layer is due to the following reasons:
- it's fast
- it does not require driver changes
- it can coexist with devices that can rotate the display at the hardware level
- it complements graphics applications that can do display rotation
The changes to core fbcon are minimal-- recognition of the console
rotation angle so it can swap directions, origins and axes (xres vs yres,
xpanstep vs ypanstep, xoffset vs yoffset, etc) and storage of the rotation
angle per display. The bulk of the code that does the actual drawing to the
screen are placed in separate files. Each angle of rotation has separate
methods (bmove, clear, putcs, cursor, update_start which is derived from
update_var, and clear_margins). To mimimize processing time, the fontdata
are pre-rotated at each console switch (only if the font or the angle has
changed).
The option can be compiled out (CONFIG_FRAMEBUFFER_CONSOLE_ROTATION = n) if
rotation is not needed.
Choosing the rotation angle can be done in several ways:
1. boot option fbcon=rotate:n, where
n = 0 - normal
n = 1 - 90 degrees (clockwise)
n = 2 - 180 degrees (upside down)
n = 3 - 270 degrees (counterclockwise)
2. echo n > /sys/class/graphics/fb[num]/con_rotate
where n is the same as described above. It sets the angle of rotation
of the current console
3 echo n > /sys/class/graphics/fb[num]/con_rotate_all
where n is the same as described above. Globally sets the angle of
rotation.
GOTCHAS:
The option, especially at angles of 90 and 270 degrees, will exercise
the least used code of drivers. Namely, at these angles, panning is done
in the x-axis, so it can reveal bugs in the driver if xpanstep is set
incorrectly. A workaround is to set xpanstep = 0.
Secondly, at these angles, the framebuffer memory access can be
unaligned if (fontheight * bpp) % 32 ~= 0 which can reveal bugs in the drivers
imageblit, fillrect and copyarea functions. (I think cfbfillrect may have
this buglet). A workaround is to use a standard 8x16 font.
Speed:
The scrolling speed difference between 0 and 180 degrees is minimal,
somewhere areound 1-2%. At 90 or 270 degress, speed drops down to a vicinity
of 30-40%. This is understandable because the blit direction is across the
framebuffer "direction." Scrolling will be helped at these angles if xpanstep
is not equal to zero, use of 8x16 fonts, and setting xres_virtual >= xres * 2.
Note: The code is tested on little-endian only, so I don't know if it will
work in big-endian. Please let me know, it will take only less than a minute
of your time.
This patch prepares fbcon for console rotation and contains the following
changes:
- add rotate field in struct fbcon_ops to keep fbcon's current rotation
angle
- add con_rotate field in struct display to store per-display rotation angle
- create a private copy of the current var to fbcon. This will prevent
fbcon from directly manipulating info->var, especially the fields xoffset,
yoffset and vmode.
- add ability to swap pertinent axes (xres, yres; xpanstep, ypanstep; etc)
depending on the rotation angle
- change global update_var() (function that sets the screen start address)
as an fbcon method update_start. This is required because the axes, start
offset, and/or direction can be reversed depending on the rotation angle.
- add fbcon method rotate_font() which will rotate each character bitmap to
the correct angle of rotation.
- add fbcon boot option 'rotate' to select the angle of rotation at bootime.
Currently does nothing until all patches are applied.
Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-11-09 12:39:09 +07:00
|
|
|
struct fbcon_ops *ops = info->fbcon_par;
|
2005-04-17 05:20:36 +07:00
|
|
|
int rows, cols, charcnt = 256;
|
|
|
|
|
|
|
|
|
|
if (var_to_display(p, var, info))
|
|
|
|
|
return;
|
|
|
|
|
t = &fb_display[svc->vc_num];
|
|
|
|
|
if (!vc->vc_font.data) {
|
2005-09-13 15:25:44 +07:00
|
|
|
vc->vc_font.data = (void *)(p->fontdata = t->fontdata);
|
2005-04-17 05:20:36 +07:00
|
|
|
vc->vc_font.width = (*default_mode)->vc_font.width;
|
|
|
|
|
vc->vc_font.height = (*default_mode)->vc_font.height;
|
|
|
|
|
p->userfont = t->userfont;
|
|
|
|
|
if (p->userfont)
|
|
|
|
|
REFCOUNT(p->fontdata)++;
|
|
|
|
|
}
|
|
|
|
|
if (p->userfont)
|
|
|
|
|
charcnt = FNTCHARCNT(p->fontdata);
|
|
|
|
|
|
2005-09-10 03:04:37 +07:00
|
|
|
var->activate = FB_ACTIVATE_NOW;
|
|
|
|
|
info->var.activate = var->activate;
|
[PATCH] fbcon: Console Rotation - Prepare fbcon for console rotation
This patch series implements generic code to rotate the console at 90, 180,
and 270 degrees. The implementation is completely done in the framebuffer
console level, thus no changes to the framebuffer layer or to the drivers
are needed.
Console rotation is required by some Sharp-based devices where the natural
orientation of the display is not at 0 degrees. Also, users that have
displays that can pivot will benefit by having a console in portrait mode
if they so desire.
The choice to implement the code in the console layer rather than in the
framebuffer layer is due to the following reasons:
- it's fast
- it does not require driver changes
- it can coexist with devices that can rotate the display at the hardware level
- it complements graphics applications that can do display rotation
The changes to core fbcon are minimal-- recognition of the console
rotation angle so it can swap directions, origins and axes (xres vs yres,
xpanstep vs ypanstep, xoffset vs yoffset, etc) and storage of the rotation
angle per display. The bulk of the code that does the actual drawing to the
screen are placed in separate files. Each angle of rotation has separate
methods (bmove, clear, putcs, cursor, update_start which is derived from
update_var, and clear_margins). To mimimize processing time, the fontdata
are pre-rotated at each console switch (only if the font or the angle has
changed).
The option can be compiled out (CONFIG_FRAMEBUFFER_CONSOLE_ROTATION = n) if
rotation is not needed.
Choosing the rotation angle can be done in several ways:
1. boot option fbcon=rotate:n, where
n = 0 - normal
n = 1 - 90 degrees (clockwise)
n = 2 - 180 degrees (upside down)
n = 3 - 270 degrees (counterclockwise)
2. echo n > /sys/class/graphics/fb[num]/con_rotate
where n is the same as described above. It sets the angle of rotation
of the current console
3 echo n > /sys/class/graphics/fb[num]/con_rotate_all
where n is the same as described above. Globally sets the angle of
rotation.
GOTCHAS:
The option, especially at angles of 90 and 270 degrees, will exercise
the least used code of drivers. Namely, at these angles, panning is done
in the x-axis, so it can reveal bugs in the driver if xpanstep is set
incorrectly. A workaround is to set xpanstep = 0.
Secondly, at these angles, the framebuffer memory access can be
unaligned if (fontheight * bpp) % 32 ~= 0 which can reveal bugs in the drivers
imageblit, fillrect and copyarea functions. (I think cfbfillrect may have
this buglet). A workaround is to use a standard 8x16 font.
Speed:
The scrolling speed difference between 0 and 180 degrees is minimal,
somewhere areound 1-2%. At 90 or 270 degress, speed drops down to a vicinity
of 30-40%. This is understandable because the blit direction is across the
framebuffer "direction." Scrolling will be helped at these angles if xpanstep
is not equal to zero, use of 8x16 fonts, and setting xres_virtual >= xres * 2.
Note: The code is tested on little-endian only, so I don't know if it will
work in big-endian. Please let me know, it will take only less than a minute
of your time.
This patch prepares fbcon for console rotation and contains the following
changes:
- add rotate field in struct fbcon_ops to keep fbcon's current rotation
angle
- add con_rotate field in struct display to store per-display rotation angle
- create a private copy of the current var to fbcon. This will prevent
fbcon from directly manipulating info->var, especially the fields xoffset,
yoffset and vmode.
- add ability to swap pertinent axes (xres, yres; xpanstep, ypanstep; etc)
depending on the rotation angle
- change global update_var() (function that sets the screen start address)
as an fbcon method update_start. This is required because the axes, start
offset, and/or direction can be reversed depending on the rotation angle.
- add fbcon method rotate_font() which will rotate each character bitmap to
the correct angle of rotation.
- add fbcon boot option 'rotate' to select the angle of rotation at bootime.
Currently does nothing until all patches are applied.
Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-11-09 12:39:09 +07:00
|
|
|
var->yoffset = info->var.yoffset;
|
|
|
|
|
var->xoffset = info->var.xoffset;
|
2005-09-10 03:04:37 +07:00
|
|
|
fb_set_var(info, var);
|
[PATCH] fbcon: Console Rotation - Prepare fbcon for console rotation
This patch series implements generic code to rotate the console at 90, 180,
and 270 degrees. The implementation is completely done in the framebuffer
console level, thus no changes to the framebuffer layer or to the drivers
are needed.
Console rotation is required by some Sharp-based devices where the natural
orientation of the display is not at 0 degrees. Also, users that have
displays that can pivot will benefit by having a console in portrait mode
if they so desire.
The choice to implement the code in the console layer rather than in the
framebuffer layer is due to the following reasons:
- it's fast
- it does not require driver changes
- it can coexist with devices that can rotate the display at the hardware level
- it complements graphics applications that can do display rotation
The changes to core fbcon are minimal-- recognition of the console
rotation angle so it can swap directions, origins and axes (xres vs yres,
xpanstep vs ypanstep, xoffset vs yoffset, etc) and storage of the rotation
angle per display. The bulk of the code that does the actual drawing to the
screen are placed in separate files. Each angle of rotation has separate
methods (bmove, clear, putcs, cursor, update_start which is derived from
update_var, and clear_margins). To mimimize processing time, the fontdata
are pre-rotated at each console switch (only if the font or the angle has
changed).
The option can be compiled out (CONFIG_FRAMEBUFFER_CONSOLE_ROTATION = n) if
rotation is not needed.
Choosing the rotation angle can be done in several ways:
1. boot option fbcon=rotate:n, where
n = 0 - normal
n = 1 - 90 degrees (clockwise)
n = 2 - 180 degrees (upside down)
n = 3 - 270 degrees (counterclockwise)
2. echo n > /sys/class/graphics/fb[num]/con_rotate
where n is the same as described above. It sets the angle of rotation
of the current console
3 echo n > /sys/class/graphics/fb[num]/con_rotate_all
where n is the same as described above. Globally sets the angle of
rotation.
GOTCHAS:
The option, especially at angles of 90 and 270 degrees, will exercise
the least used code of drivers. Namely, at these angles, panning is done
in the x-axis, so it can reveal bugs in the driver if xpanstep is set
incorrectly. A workaround is to set xpanstep = 0.
Secondly, at these angles, the framebuffer memory access can be
unaligned if (fontheight * bpp) % 32 ~= 0 which can reveal bugs in the drivers
imageblit, fillrect and copyarea functions. (I think cfbfillrect may have
this buglet). A workaround is to use a standard 8x16 font.
Speed:
The scrolling speed difference between 0 and 180 degrees is minimal,
somewhere areound 1-2%. At 90 or 270 degress, speed drops down to a vicinity
of 30-40%. This is understandable because the blit direction is across the
framebuffer "direction." Scrolling will be helped at these angles if xpanstep
is not equal to zero, use of 8x16 fonts, and setting xres_virtual >= xres * 2.
Note: The code is tested on little-endian only, so I don't know if it will
work in big-endian. Please let me know, it will take only less than a minute
of your time.
This patch prepares fbcon for console rotation and contains the following
changes:
- add rotate field in struct fbcon_ops to keep fbcon's current rotation
angle
- add con_rotate field in struct display to store per-display rotation angle
- create a private copy of the current var to fbcon. This will prevent
fbcon from directly manipulating info->var, especially the fields xoffset,
yoffset and vmode.
- add ability to swap pertinent axes (xres, yres; xpanstep, ypanstep; etc)
depending on the rotation angle
- change global update_var() (function that sets the screen start address)
as an fbcon method update_start. This is required because the axes, start
offset, and/or direction can be reversed depending on the rotation angle.
- add fbcon method rotate_font() which will rotate each character bitmap to
the correct angle of rotation.
- add fbcon boot option 'rotate' to select the angle of rotation at bootime.
Currently does nothing until all patches are applied.
Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-11-09 12:39:09 +07:00
|
|
|
ops->var = info->var;
|
2005-09-10 03:04:37 +07:00
|
|
|
vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
|
2005-04-17 05:20:36 +07:00
|
|
|
vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
|
|
|
|
|
if (charcnt == 256) {
|
|
|
|
|
vc->vc_hi_font_mask = 0;
|
|
|
|
|
} else {
|
|
|
|
|
vc->vc_hi_font_mask = 0x100;
|
|
|
|
|
if (vc->vc_can_do_color)
|
|
|
|
|
vc->vc_complement_mask <<= 1;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if (!*svc->vc_uni_pagedir_loc)
|
|
|
|
|
con_set_default_unimap(svc);
|
|
|
|
|
if (!*vc->vc_uni_pagedir_loc)
|
|
|
|
|
con_copy_unimap(vc, svc);
|
|
|
|
|
|
[PATCH] fbcon: Console Rotation - Prepare fbcon for console rotation
This patch series implements generic code to rotate the console at 90, 180,
and 270 degrees. The implementation is completely done in the framebuffer
console level, thus no changes to the framebuffer layer or to the drivers
are needed.
Console rotation is required by some Sharp-based devices where the natural
orientation of the display is not at 0 degrees. Also, users that have
displays that can pivot will benefit by having a console in portrait mode
if they so desire.
The choice to implement the code in the console layer rather than in the
framebuffer layer is due to the following reasons:
- it's fast
- it does not require driver changes
- it can coexist with devices that can rotate the display at the hardware level
- it complements graphics applications that can do display rotation
The changes to core fbcon are minimal-- recognition of the console
rotation angle so it can swap directions, origins and axes (xres vs yres,
xpanstep vs ypanstep, xoffset vs yoffset, etc) and storage of the rotation
angle per display. The bulk of the code that does the actual drawing to the
screen are placed in separate files. Each angle of rotation has separate
methods (bmove, clear, putcs, cursor, update_start which is derived from
update_var, and clear_margins). To mimimize processing time, the fontdata
are pre-rotated at each console switch (only if the font or the angle has
changed).
The option can be compiled out (CONFIG_FRAMEBUFFER_CONSOLE_ROTATION = n) if
rotation is not needed.
Choosing the rotation angle can be done in several ways:
1. boot option fbcon=rotate:n, where
n = 0 - normal
n = 1 - 90 degrees (clockwise)
n = 2 - 180 degrees (upside down)
n = 3 - 270 degrees (counterclockwise)
2. echo n > /sys/class/graphics/fb[num]/con_rotate
where n is the same as described above. It sets the angle of rotation
of the current console
3 echo n > /sys/class/graphics/fb[num]/con_rotate_all
where n is the same as described above. Globally sets the angle of
rotation.
GOTCHAS:
The option, especially at angles of 90 and 270 degrees, will exercise
the least used code of drivers. Namely, at these angles, panning is done
in the x-axis, so it can reveal bugs in the driver if xpanstep is set
incorrectly. A workaround is to set xpanstep = 0.
Secondly, at these angles, the framebuffer memory access can be
unaligned if (fontheight * bpp) % 32 ~= 0 which can reveal bugs in the drivers
imageblit, fillrect and copyarea functions. (I think cfbfillrect may have
this buglet). A workaround is to use a standard 8x16 font.
Speed:
The scrolling speed difference between 0 and 180 degrees is minimal,
somewhere areound 1-2%. At 90 or 270 degress, speed drops down to a vicinity
of 30-40%. This is understandable because the blit direction is across the
framebuffer "direction." Scrolling will be helped at these angles if xpanstep
is not equal to zero, use of 8x16 fonts, and setting xres_virtual >= xres * 2.
Note: The code is tested on little-endian only, so I don't know if it will
work in big-endian. Please let me know, it will take only less than a minute
of your time.
This patch prepares fbcon for console rotation and contains the following
changes:
- add rotate field in struct fbcon_ops to keep fbcon's current rotation
angle
- add con_rotate field in struct display to store per-display rotation angle
- create a private copy of the current var to fbcon. This will prevent
fbcon from directly manipulating info->var, especially the fields xoffset,
yoffset and vmode.
- add ability to swap pertinent axes (xres, yres; xpanstep, ypanstep; etc)
depending on the rotation angle
- change global update_var() (function that sets the screen start address)
as an fbcon method update_start. This is required because the axes, start
offset, and/or direction can be reversed depending on the rotation angle.
- add fbcon method rotate_font() which will rotate each character bitmap to
the correct angle of rotation.
- add fbcon boot option 'rotate' to select the angle of rotation at bootime.
Currently does nothing until all patches are applied.
Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-11-09 12:39:09 +07:00
|
|
|
cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
|
|
|
|
|
rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
|
|
|
|
|
cols /= vc->vc_font.width;
|
|
|
|
|
rows /= vc->vc_font.height;
|
2005-04-17 05:20:36 +07:00
|
|
|
vc_resize(vc, cols, rows);
|
[PATCH] fbcon: Console Rotation - Prepare fbcon for console rotation
This patch series implements generic code to rotate the console at 90, 180,
and 270 degrees. The implementation is completely done in the framebuffer
console level, thus no changes to the framebuffer layer or to the drivers
are needed.
Console rotation is required by some Sharp-based devices where the natural
orientation of the display is not at 0 degrees. Also, users that have
displays that can pivot will benefit by having a console in portrait mode
if they so desire.
The choice to implement the code in the console layer rather than in the
framebuffer layer is due to the following reasons:
- it's fast
- it does not require driver changes
- it can coexist with devices that can rotate the display at the hardware level
- it complements graphics applications that can do display rotation
The changes to core fbcon are minimal-- recognition of the console
rotation angle so it can swap directions, origins and axes (xres vs yres,
xpanstep vs ypanstep, xoffset vs yoffset, etc) and storage of the rotation
angle per display. The bulk of the code that does the actual drawing to the
screen are placed in separate files. Each angle of rotation has separate
methods (bmove, clear, putcs, cursor, update_start which is derived from
update_var, and clear_margins). To mimimize processing time, the fontdata
are pre-rotated at each console switch (only if the font or the angle has
changed).
The option can be compiled out (CONFIG_FRAMEBUFFER_CONSOLE_ROTATION = n) if
rotation is not needed.
Choosing the rotation angle can be done in several ways:
1. boot option fbcon=rotate:n, where
n = 0 - normal
n = 1 - 90 degrees (clockwise)
n = 2 - 180 degrees (upside down)
n = 3 - 270 degrees (counterclockwise)
2. echo n > /sys/class/graphics/fb[num]/con_rotate
where n is the same as described above. It sets the angle of rotation
of the current console
3 echo n > /sys/class/graphics/fb[num]/con_rotate_all
where n is the same as described above. Globally sets the angle of
rotation.
GOTCHAS:
The option, especially at angles of 90 and 270 degrees, will exercise
the least used code of drivers. Namely, at these angles, panning is done
in the x-axis, so it can reveal bugs in the driver if xpanstep is set
incorrectly. A workaround is to set xpanstep = 0.
Secondly, at these angles, the framebuffer memory access can be
unaligned if (fontheight * bpp) % 32 ~= 0 which can reveal bugs in the drivers
imageblit, fillrect and copyarea functions. (I think cfbfillrect may have
this buglet). A workaround is to use a standard 8x16 font.
Speed:
The scrolling speed difference between 0 and 180 degrees is minimal,
somewhere areound 1-2%. At 90 or 270 degress, speed drops down to a vicinity
of 30-40%. This is understandable because the blit direction is across the
framebuffer "direction." Scrolling will be helped at these angles if xpanstep
is not equal to zero, use of 8x16 fonts, and setting xres_virtual >= xres * 2.
Note: The code is tested on little-endian only, so I don't know if it will
work in big-endian. Please let me know, it will take only less than a minute
of your time.
This patch prepares fbcon for console rotation and contains the following
changes:
- add rotate field in struct fbcon_ops to keep fbcon's current rotation
angle
- add con_rotate field in struct display to store per-display rotation angle
- create a private copy of the current var to fbcon. This will prevent
fbcon from directly manipulating info->var, especially the fields xoffset,
yoffset and vmode.
- add ability to swap pertinent axes (xres, yres; xpanstep, ypanstep; etc)
depending on the rotation angle
- change global update_var() (function that sets the screen start address)
as an fbcon method update_start. This is required because the axes, start
offset, and/or direction can be reversed depending on the rotation angle.
- add fbcon method rotate_font() which will rotate each character bitmap to
the correct angle of rotation.
- add fbcon boot option 'rotate' to select the angle of rotation at bootime.
Currently does nothing until all patches are applied.
Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-11-09 12:39:09 +07:00
|
|
|
|
2005-04-17 05:20:36 +07:00
|
|
|
if (CON_IS_VISIBLE(vc)) {
|
|
|
|
|
update_screen(vc);
|
2005-11-07 16:00:36 +07:00
|
|
|
if (softback_buf)
|
|
|
|
|
fbcon_update_softback(vc);
|
2005-04-17 05:20:36 +07:00
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static __inline__ void ywrap_up(struct vc_data *vc, int count)
|
|
|
|
|
{
|
|
|
|
|
struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
|
[PATCH] fbcon: Console Rotation - Prepare fbcon for console rotation
This patch series implements generic code to rotate the console at 90, 180,
and 270 degrees. The implementation is completely done in the framebuffer
console level, thus no changes to the framebuffer layer or to the drivers
are needed.
Console rotation is required by some Sharp-based devices where the natural
orientation of the display is not at 0 degrees. Also, users that have
displays that can pivot will benefit by having a console in portrait mode
if they so desire.
The choice to implement the code in the console layer rather than in the
framebuffer layer is due to the following reasons:
- it's fast
- it does not require driver changes
- it can coexist with devices that can rotate the display at the hardware level
- it complements graphics applications that can do display rotation
The changes to core fbcon are minimal-- recognition of the console
rotation angle so it can swap directions, origins and axes (xres vs yres,
xpanstep vs ypanstep, xoffset vs yoffset, etc) and storage of the rotation
angle per display. The bulk of the code that does the actual drawing to the
screen are placed in separate files. Each angle of rotation has separate
methods (bmove, clear, putcs, cursor, update_start which is derived from
update_var, and clear_margins). To mimimize processing time, the fontdata
are pre-rotated at each console switch (only if the font or the angle has
changed).
The option can be compiled out (CONFIG_FRAMEBUFFER_CONSOLE_ROTATION = n) if
rotation is not needed.
Choosing the rotation angle can be done in several ways:
1. boot option fbcon=rotate:n, where
n = 0 - normal
n = 1 - 90 degrees (clockwise)
n = 2 - 180 degrees (upside down)
n = 3 - 270 degrees (counterclockwise)
2. echo n > /sys/class/graphics/fb[num]/con_rotate
where n is the same as described above. It sets the angle of rotation
of the current console
3 echo n > /sys/class/graphics/fb[num]/con_rotate_all
where n is the same as described above. Globally sets the angle of
rotation.
GOTCHAS:
The option, especially at angles of 90 and 270 degrees, will exercise
the least used code of drivers. Namely, at these angles, panning is done
in the x-axis, so it can reveal bugs in the driver if xpanstep is set
incorrectly. A workaround is to set xpanstep = 0.
Secondly, at these angles, the framebuffer memory access can be
unaligned if (fontheight * bpp) % 32 ~= 0 which can reveal bugs in the drivers
imageblit, fillrect and copyarea functions. (I think cfbfillrect may have
this buglet). A workaround is to use a standard 8x16 font.
Speed:
The scrolling speed difference between 0 and 180 degrees is minimal,
somewhere areound 1-2%. At 90 or 270 degress, speed drops down to a vicinity
of 30-40%. This is understandable because the blit direction is across the
framebuffer "direction." Scrolling will be helped at these angles if xpanstep
is not equal to zero, use of 8x16 fonts, and setting xres_virtual >= xres * 2.
Note: The code is tested on little-endian only, so I don't know if it will
work in big-endian. Please let me know, it will take only less than a minute
of your time.
This patch prepares fbcon for console rotation and contains the following
changes:
- add rotate field in struct fbcon_ops to keep fbcon's current rotation
angle
- add con_rotate field in struct display to store per-display rotation angle
- create a private copy of the current var to fbcon. This will prevent
fbcon from directly manipulating info->var, especially the fields xoffset,
yoffset and vmode.
- add ability to swap pertinent axes (xres, yres; xpanstep, ypanstep; etc)
depending on the rotation angle
- change global update_var() (function that sets the screen start address)
as an fbcon method update_start. This is required because the axes, start
offset, and/or direction can be reversed depending on the rotation angle.
- add fbcon method rotate_font() which will rotate each character bitmap to
the correct angle of rotation.
- add fbcon boot option 'rotate' to select the angle of rotation at bootime.
Currently does nothing until all patches are applied.
Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-11-09 12:39:09 +07:00
|
|
|
struct fbcon_ops *ops = info->fbcon_par;
|
2005-04-17 05:20:36 +07:00
|
|
|
struct display *p = &fb_display[vc->vc_num];
|
|
|
|
|
|
|
|
|
|
p->yscroll += count;
|
|
|
|
|
if (p->yscroll >= p->vrows) /* Deal with wrap */
|
|
|
|
|
p->yscroll -= p->vrows;
|
[PATCH] fbcon: Console Rotation - Prepare fbcon for console rotation
This patch series implements generic code to rotate the console at 90, 180,
and 270 degrees. The implementation is completely done in the framebuffer
console level, thus no changes to the framebuffer layer or to the drivers
are needed.
Console rotation is required by some Sharp-based devices where the natural
orientation of the display is not at 0 degrees. Also, users that have
displays that can pivot will benefit by having a console in portrait mode
if they so desire.
The choice to implement the code in the console layer rather than in the
framebuffer layer is due to the following reasons:
- it's fast
- it does not require driver changes
- it can coexist with devices that can rotate the display at the hardware level
- it complements graphics applications that can do display rotation
The changes to core fbcon are minimal-- recognition of the console
rotation angle so it can swap directions, origins and axes (xres vs yres,
xpanstep vs ypanstep, xoffset vs yoffset, etc) and storage of the rotation
angle per display. The bulk of the code that does the actual drawing to the
screen are placed in separate files. Each angle of rotation has separate
methods (bmove, clear, putcs, cursor, update_start which is derived from
update_var, and clear_margins). To mimimize processing time, the fontdata
are pre-rotated at each console switch (only if the font or the angle has
changed).
The option can be compiled out (CONFIG_FRAMEBUFFER_CONSOLE_ROTATION = n) if
rotation is not needed.
Choosing the rotation angle can be done in several ways:
1. boot option fbcon=rotate:n, where
n = 0 - normal
n = 1 - 90 degrees (clockwise)
n = 2 - 180 degrees (upside down)
n = 3 - 270 degrees (counterclockwise)
2. echo n > /sys/class/graphics/fb[num]/con_rotate
where n is the same as described above. It sets the angle of rotation
of the current console
3 echo n > /sys/class/graphics/fb[num]/con_rotate_all
where n is the same as described above. Globally sets the angle of
rotation.
GOTCHAS:
The option, especially at angles of 90 and 270 degrees, will exercise
the least used code of drivers. Namely, at these angles, panning is done
in the x-axis, so it can reveal bugs in the driver if xpanstep is set
incorrectly. A workaround is to set xpanstep = 0.
Secondly, at these angles, the framebuffer memory access can be
unaligned if (fontheight * bpp) % 32 ~= 0 which can reveal bugs in the drivers
imageblit, fillrect and copyarea functions. (I think cfbfillrect may have
this buglet). A workaround is to use a standard 8x16 font.
Speed:
The scrolling speed difference between 0 and 180 degrees is minimal,
somewhere areound 1-2%. At 90 or 270 degress, speed drops down to a vicinity
of 30-40%. This is understandable because the blit direction is across the
framebuffer "direction." Scrolling will be helped at these angles if xpanstep
is not equal to zero, use of 8x16 fonts, and setting xres_virtual >= xres * 2.
Note: The code is tested on little-endian only, so I don't know if it will
work in big-endian. Please let me know, it will take only less than a minute
of your time.
This patch prepares fbcon for console rotation and contains the following
changes:
- add rotate field in struct fbcon_ops to keep fbcon's current rotation
angle
- add con_rotate field in struct display to store per-display rotation angle
- create a private copy of the current var to fbcon. This will prevent
fbcon from directly manipulating info->var, especially the fields xoffset,
yoffset and vmode.
- add ability to swap pertinent axes (xres, yres; xpanstep, ypanstep; etc)
depending on the rotation angle
- change global update_var() (function that sets the screen start address)
as an fbcon method update_start. This is required because the axes, start
offset, and/or direction can be reversed depending on the rotation angle.
- add fbcon method rotate_font() which will rotate each character bitmap to
the correct angle of rotation.
- add fbcon boot option 'rotate' to select the angle of rotation at bootime.
Currently does nothing until all patches are applied.
Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-11-09 12:39:09 +07:00
|
|
|
ops->var.xoffset = 0;
|
|
|
|
|
ops->var.yoffset = p->yscroll * vc->vc_font.height;
|
|
|
|
|
ops->var.vmode |= FB_VMODE_YWRAP;
|
|
|
|
|
ops->update_start(info);
|
2005-04-17 05:20:36 +07:00
|
|
|
scrollback_max += count;
|
|
|
|
|
if (scrollback_max > scrollback_phys_max)
|
|
|
|
|
scrollback_max = scrollback_phys_max;
|
|
|
|
|
scrollback_current = 0;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static __inline__ void ywrap_down(struct vc_data *vc, int count)
|
|
|
|
|
{
|
|
|
|
|
struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
|
[PATCH] fbcon: Console Rotation - Prepare fbcon for console rotation
This patch series implements generic code to rotate the console at 90, 180,
and 270 degrees. The implementation is completely done in the framebuffer
console level, thus no changes to the framebuffer layer or to the drivers
are needed.
Console rotation is required by some Sharp-based devices where the natural
orientation of the display is not at 0 degrees. Also, users that have
displays that can pivot will benefit by having a console in portrait mode
if they so desire.
The choice to implement the code in the console layer rather than in the
framebuffer layer is due to the following reasons:
- it's fast
- it does not require driver changes
- it can coexist with devices that can rotate the display at the hardware level
- it complements graphics applications that can do display rotation
The changes to core fbcon are minimal-- recognition of the console
rotation angle so it can swap directions, origins and axes (xres vs yres,
xpanstep vs ypanstep, xoffset vs yoffset, etc) and storage of the rotation
angle per display. The bulk of the code that does the actual drawing to the
screen are placed in separate files. Each angle of rotation has separate
methods (bmove, clear, putcs, cursor, update_start which is derived from
update_var, and clear_margins). To mimimize processing time, the fontdata
are pre-rotated at each console switch (only if the font or the angle has
changed).
The option can be compiled out (CONFIG_FRAMEBUFFER_CONSOLE_ROTATION = n) if
rotation is not needed.
Choosing the rotation angle can be done in several ways:
1. boot option fbcon=rotate:n, where
n = 0 - normal
n = 1 - 90 degrees (clockwise)
n = 2 - 180 degrees (upside down)
n = 3 - 270 degrees (counterclockwise)
2. echo n > /sys/class/graphics/fb[num]/con_rotate
where n is the same as described above. It sets the angle of rotation
of the current console
3 echo n > /sys/class/graphics/fb[num]/con_rotate_all
where n is the same as described above. Globally sets the angle of
rotation.
GOTCHAS:
The option, especially at angles of 90 and 270 degrees, will exercise
the least used code of drivers. Namely, at these angles, panning is done
in the x-axis, so it can reveal bugs in the driver if xpanstep is set
incorrectly. A workaround is to set xpanstep = 0.
Secondly, at these angles, the framebuffer memory access can be
unaligned if (fontheight * bpp) % 32 ~= 0 which can reveal bugs in the drivers
imageblit, fillrect and copyarea functions. (I think cfbfillrect may have
this buglet). A workaround is to use a standard 8x16 font.
Speed:
The scrolling speed difference between 0 and 180 degrees is minimal,
somewhere areound 1-2%. At 90 or 270 degress, speed drops down to a vicinity
of 30-40%. This is understandable because the blit direction is across the
framebuffer "direction." Scrolling will be helped at these angles if xpanstep
is not equal to zero, use of 8x16 fonts, and setting xres_virtual >= xres * 2.
Note: The code is tested on little-endian only, so I don't know if it will
work in big-endian. Please let me know, it will take only less than a minute
of your time.
This patch prepares fbcon for console rotation and contains the following
changes:
- add rotate field in struct fbcon_ops to keep fbcon's current rotation
angle
- add con_rotate field in struct display to store per-display rotation angle
- create a private copy of the current var to fbcon. This will prevent
fbcon from directly manipulating info->var, especially the fields xoffset,
yoffset and vmode.
- add ability to swap pertinent axes (xres, yres; xpanstep, ypanstep; etc)
depending on the rotation angle
- change global update_var() (function that sets the screen start address)
as an fbcon method update_start. This is required because the axes, start
offset, and/or direction can be reversed depending on the rotation angle.
- add fbcon method rotate_font() which will rotate each character bitmap to
the correct angle of rotation.
- add fbcon boot option 'rotate' to select the angle of rotation at bootime.
Currently does nothing until all patches are applied.
Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-11-09 12:39:09 +07:00
|
|
|
struct fbcon_ops *ops = info->fbcon_par;
|
2005-04-17 05:20:36 +07:00
|
|
|
struct display *p = &fb_display[vc->vc_num];
|
|
|
|
|
|
|
|
|
|
p->yscroll -= count;
|
|
|
|
|
if (p->yscroll < 0) /* Deal with wrap */
|
|
|
|
|
p->yscroll += p->vrows;
|
[PATCH] fbcon: Console Rotation - Prepare fbcon for console rotation
This patch series implements generic code to rotate the console at 90, 180,
and 270 degrees. The implementation is completely done in the framebuffer
console level, thus no changes to the framebuffer layer or to the drivers
are needed.
Console rotation is required by some Sharp-based devices where the natural
orientation of the display is not at 0 degrees. Also, users that have
displays that can pivot will benefit by having a console in portrait mode
if they so desire.
The choice to implement the code in the console layer rather than in the
framebuffer layer is due to the following reasons:
- it's fast
- it does not require driver changes
- it can coexist with devices that can rotate the display at the hardware level
- it complements graphics applications that can do display rotation
The changes to core fbcon are minimal-- recognition of the console
rotation angle so it can swap directions, origins and axes (xres vs yres,
xpanstep vs ypanstep, xoffset vs yoffset, etc) and storage of the rotation
angle per display. The bulk of the code that does the actual drawing to the
screen are placed in separate files. Each angle of rotation has separate
methods (bmove, clear, putcs, cursor, update_start which is derived from
update_var, and clear_margins). To mimimize processing time, the fontdata
are pre-rotated at each console switch (only if the font or the angle has
changed).
The option can be compiled out (CONFIG_FRAMEBUFFER_CONSOLE_ROTATION = n) if
rotation is not needed.
Choosing the rotation angle can be done in several ways:
1. boot option fbcon=rotate:n, where
n = 0 - normal
n = 1 - 90 degrees (clockwise)
n = 2 - 180 degrees (upside down)
n = 3 - 270 degrees (counterclockwise)
2. echo n > /sys/class/graphics/fb[num]/con_rotate
where n is the same as described above. It sets the angle of rotation
of the current console
3 echo n > /sys/class/graphics/fb[num]/con_rotate_all
where n is the same as described above. Globally sets the angle of
rotation.
GOTCHAS:
The option, especially at angles of 90 and 270 degrees, will exercise
the least used code of drivers. Namely, at these angles, panning is done
in the x-axis, so it can reveal bugs in the driver if xpanstep is set
incorrectly. A workaround is to set xpanstep = 0.
Secondly, at these angles, the framebuffer memory access can be
unaligned if (fontheight * bpp) % 32 ~= 0 which can reveal bugs in the drivers
imageblit, fillrect and copyarea functions. (I think cfbfillrect may have
this buglet). A workaround is to use a standard 8x16 font.
Speed:
The scrolling speed difference between 0 and 180 degrees is minimal,
somewhere areound 1-2%. At 90 or 270 degress, speed drops down to a vicinity
of 30-40%. This is understandable because the blit direction is across the
framebuffer "direction." Scrolling will be helped at these angles if xpanstep
is not equal to zero, use of 8x16 fonts, and setting xres_virtual >= xres * 2.
Note: The code is tested on little-endian only, so I don't know if it will
work in big-endian. Please let me know, it will take only less than a minute
of your time.
This patch prepares fbcon for console rotation and contains the following
changes:
- add rotate field in struct fbcon_ops to keep fbcon's current rotation
angle
- add con_rotate field in struct display to store per-display rotation angle
- create a private copy of the current var to fbcon. This will prevent
fbcon from directly manipulating info->var, especially the fields xoffset,
yoffset and vmode.
- add ability to swap pertinent axes (xres, yres; xpanstep, ypanstep; etc)
depending on the rotation angle
- change global update_var() (function that sets the screen start address)
as an fbcon method update_start. This is required because the axes, start
offset, and/or direction can be reversed depending on the rotation angle.
- add fbcon method rotate_font() which will rotate each character bitmap to
the correct angle of rotation.
- add fbcon boot option 'rotate' to select the angle of rotation at bootime.
Currently does nothing until all patches are applied.
Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-11-09 12:39:09 +07:00
|
|
|
ops->var.xoffset = 0;
|
|
|
|
|
ops->var.yoffset = p->yscroll * vc->vc_font.height;
|
|
|
|
|
ops->var.vmode |= FB_VMODE_YWRAP;
|
|
|
|
|
ops->update_start(info);
|
2005-04-17 05:20:36 +07:00
|
|
|
scrollback_max -= count;
|
|
|
|
|
if (scrollback_max < 0)
|
|
|
|
|
scrollback_max = 0;
|
|
|
|
|
scrollback_current = 0;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static __inline__ void ypan_up(struct vc_data *vc, int count)
|
|
|
|
|
{
|
|
|
|
|
struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
|
|
|
|
|
struct display *p = &fb_display[vc->vc_num];
|
|
|
|
|
struct fbcon_ops *ops = info->fbcon_par;
|
|
|
|
|
|
|
|
|
|
p->yscroll += count;
|
|
|
|
|
if (p->yscroll > p->vrows - vc->vc_rows) {
|
|
|
|
|
ops->bmove(vc, info, p->vrows - vc->vc_rows,
|
|
|
|
|
0, 0, 0, vc->vc_rows, vc->vc_cols);
|
|
|
|
|
p->yscroll -= p->vrows - vc->vc_rows;
|
|
|
|
|
}
|
[PATCH] fbcon: Console Rotation - Prepare fbcon for console rotation
This patch series implements generic code to rotate the console at 90, 180,
and 270 degrees. The implementation is completely done in the framebuffer
console level, thus no changes to the framebuffer layer or to the drivers
are needed.
Console rotation is required by some Sharp-based devices where the natural
orientation of the display is not at 0 degrees. Also, users that have
displays that can pivot will benefit by having a console in portrait mode
if they so desire.
The choice to implement the code in the console layer rather than in the
framebuffer layer is due to the following reasons:
- it's fast
- it does not require driver changes
- it can coexist with devices that can rotate the display at the hardware level
- it complements graphics applications that can do display rotation
The changes to core fbcon are minimal-- recognition of the console
rotation angle so it can swap directions, origins and axes (xres vs yres,
xpanstep vs ypanstep, xoffset vs yoffset, etc) and storage of the rotation
angle per display. The bulk of the code that does the actual drawing to the
screen are placed in separate files. Each angle of rotation has separate
methods (bmove, clear, putcs, cursor, update_start which is derived from
update_var, and clear_margins). To mimimize processing time, the fontdata
are pre-rotated at each console switch (only if the font or the angle has
changed).
The option can be compiled out (CONFIG_FRAMEBUFFER_CONSOLE_ROTATION = n) if
rotation is not needed.
Choosing the rotation angle can be done in several ways:
1. boot option fbcon=rotate:n, where
n = 0 - normal
n = 1 - 90 degrees (clockwise)
n = 2 - 180 degrees (upside down)
n = 3 - 270 degrees (counterclockwise)
2. echo n > /sys/class/graphics/fb[num]/con_rotate
where n is the same as described above. It sets the angle of rotation
of the current console
3 echo n > /sys/class/graphics/fb[num]/con_rotate_all
where n is the same as described above. Globally sets the angle of
rotation.
GOTCHAS:
The option, especially at angles of 90 and 270 degrees, will exercise
the least used code of drivers. Namely, at these angles, panning is done
in the x-axis, so it can reveal bugs in the driver if xpanstep is set
incorrectly. A workaround is to set xpanstep = 0.
Secondly, at these angles, the framebuffer memory access can be
unaligned if (fontheight * bpp) % 32 ~= 0 which can reveal bugs in the drivers
imageblit, fillrect and copyarea functions. (I think cfbfillrect may have
this buglet). A workaround is to use a standard 8x16 font.
Speed:
The scrolling speed difference between 0 and 180 degrees is minimal,
somewhere areound 1-2%. At 90 or 270 degress, speed drops down to a vicinity
of 30-40%. This is understandable because the blit direction is across the
framebuffer "direction." Scrolling will be helped at these angles if xpanstep
is not equal to zero, use of 8x16 fonts, and setting xres_virtual >= xres * 2.
Note: The code is tested on little-endian only, so I don't know if it will
work in big-endian. Please let me know, it will take only less than a minute
of your time.
This patch prepares fbcon for console rotation and contains the following
changes:
- add rotate field in struct fbcon_ops to keep fbcon's current rotation
angle
- add con_rotate field in struct display to store per-display rotation angle
- create a private copy of the current var to fbcon. This will prevent
fbcon from directly manipulating info->var, especially the fields xoffset,
yoffset and vmode.
- add ability to swap pertinent axes (xres, yres; xpanstep, ypanstep; etc)
depending on the rotation angle
- change global update_var() (function that sets the screen start address)
as an fbcon method update_start. This is required because the axes, start
offset, and/or direction can be reversed depending on the rotation angle.
- add fbcon method rotate_font() which will rotate each character bitmap to
the correct angle of rotation.
- add fbcon boot option 'rotate' to select the angle of rotation at bootime.
Currently does nothing until all patches are applied.
Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-11-09 12:39:09 +07:00
|
|
|
|
|
|
|
|
ops->var.xoffset = 0;
|
|
|
|
|
ops->var.yoffset = p->yscroll * vc->vc_font.height;
|
|
|
|
|
ops->var.vmode &= ~FB_VMODE_YWRAP;
|
|
|
|
|
ops->update_start(info);
|
2005-04-17 05:20:36 +07:00
|
|
|
fbcon_clear_margins(vc, 1);
|
|
|
|
|
scrollback_max += count;
|
|
|
|
|
if (scrollback_max > scrollback_phys_max)
|
|
|
|
|
scrollback_max = scrollback_phys_max;
|
|
|
|
|
scrollback_current = 0;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static __inline__ void ypan_up_redraw(struct vc_data *vc, int t, int count)
|
|
|
|
|
{
|
|
|
|
|
struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
|
[PATCH] fbcon: Console Rotation - Prepare fbcon for console rotation
This patch series implements generic code to rotate the console at 90, 180,
and 270 degrees. The implementation is completely done in the framebuffer
console level, thus no changes to the framebuffer layer or to the drivers
are needed.
Console rotation is required by some Sharp-based devices where the natural
orientation of the display is not at 0 degrees. Also, users that have
displays that can pivot will benefit by having a console in portrait mode
if they so desire.
The choice to implement the code in the console layer rather than in the
framebuffer layer is due to the following reasons:
- it's fast
- it does not require driver changes
- it can coexist with devices that can rotate the display at the hardware level
- it complements graphics applications that can do display rotation
The changes to core fbcon are minimal-- recognition of the console
rotation angle so it can swap directions, origins and axes (xres vs yres,
xpanstep vs ypanstep, xoffset vs yoffset, etc) and storage of the rotation
angle per display. The bulk of the code that does the actual drawing to the
screen are placed in separate files. Each angle of rotation has separate
methods (bmove, clear, putcs, cursor, update_start which is derived from
update_var, and clear_margins). To mimimize processing time, the fontdata
are pre-rotated at each console switch (only if the font or the angle has
changed).
The option can be compiled out (CONFIG_FRAMEBUFFER_CONSOLE_ROTATION = n) if
rotation is not needed.
Choosing the rotation angle can be done in several ways:
1. boot option fbcon=rotate:n, where
n = 0 - normal
n = 1 - 90 degrees (clockwise)
n = 2 - 180 degrees (upside down)
n = 3 - 270 degrees (counterclockwise)
2. echo n > /sys/class/graphics/fb[num]/con_rotate
where n is the same as described above. It sets the angle of rotation
of the current console
3 echo n > /sys/class/graphics/fb[num]/con_rotate_all
where n is the same as described above. Globally sets the angle of
rotation.
GOTCHAS:
The option, especially at angles of 90 and 270 degrees, will exercise
the least used code of drivers. Namely, at these angles, panning is done
in the x-axis, so it can reveal bugs in the driver if xpanstep is set
incorrectly. A workaround is to set xpanstep = 0.
Secondly, at these angles, the framebuffer memory access can be
unaligned if (fontheight * bpp) % 32 ~= 0 which can reveal bugs in the drivers
imageblit, fillrect and copyarea functions. (I think cfbfillrect may have
this buglet). A workaround is to use a standard 8x16 font.
Speed:
The scrolling speed difference between 0 and 180 degrees is minimal,
somewhere areound 1-2%. At 90 or 270 degress, speed drops down to a vicinity
of 30-40%. This is understandable because the blit direction is across the
framebuffer "direction." Scrolling will be helped at these angles if xpanstep
is not equal to zero, use of 8x16 fonts, and setting xres_virtual >= xres * 2.
Note: The code is tested on little-endian only, so I don't know if it will
work in big-endian. Please let me know, it will take only less than a minute
of your time.
This patch prepares fbcon for console rotation and contains the following
changes:
- add rotate field in struct fbcon_ops to keep fbcon's current rotation
angle
- add con_rotate field in struct display to store per-display rotation angle
- create a private copy of the current var to fbcon. This will prevent
fbcon from directly manipulating info->var, especially the fields xoffset,
yoffset and vmode.
- add ability to swap pertinent axes (xres, yres; xpanstep, ypanstep; etc)
depending on the rotation angle
- change global update_var() (function that sets the screen start address)
as an fbcon method update_start. This is required because the axes, start
offset, and/or direction can be reversed depending on the rotation angle.
- add fbcon method rotate_font() which will rotate each character bitmap to
the correct angle of rotation.
- add fbcon boot option 'rotate' to select the angle of rotation at bootime.
Currently does nothing until all patches are applied.
Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-11-09 12:39:09 +07:00
|
|
|
struct fbcon_ops *ops = info->fbcon_par;
|
2005-04-17 05:20:36 +07:00
|
|
|
struct display *p = &fb_display[vc->vc_num];
|
|
|
|
|
int redraw = 0;
|
|
|
|
|
|
|
|
|
|
p->yscroll += count;
|
|
|
|
|
if (p->yscroll > p->vrows - vc->vc_rows) {
|
|
|
|
|
p->yscroll -= p->vrows - vc->vc_rows;
|
|
|
|
|
redraw = 1;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if (redraw)
|
|
|
|
|
fbcon_redraw_move(vc, p, t + count, vc->vc_rows - count, t);
|
[PATCH] fbcon: Console Rotation - Prepare fbcon for console rotation
This patch series implements generic code to rotate the console at 90, 180,
and 270 degrees. The implementation is completely done in the framebuffer
console level, thus no changes to the framebuffer layer or to the drivers
are needed.
Console rotation is required by some Sharp-based devices where the natural
orientation of the display is not at 0 degrees. Also, users that have
displays that can pivot will benefit by having a console in portrait mode
if they so desire.
The choice to implement the code in the console layer rather than in the
framebuffer layer is due to the following reasons:
- it's fast
- it does not require driver changes
- it can coexist with devices that can rotate the display at the hardware level
- it complements graphics applications that can do display rotation
The changes to core fbcon are minimal-- recognition of the console
rotation angle so it can swap directions, origins and axes (xres vs yres,
xpanstep vs ypanstep, xoffset vs yoffset, etc) and storage of the rotation
angle per display. The bulk of the code that does the actual drawing to the
screen are placed in separate files. Each angle of rotation has separate
methods (bmove, clear, putcs, cursor, update_start which is derived from
update_var, and clear_margins). To mimimize processing time, the fontdata
are pre-rotated at each console switch (only if the font or the angle has
changed).
The option can be compiled out (CONFIG_FRAMEBUFFER_CONSOLE_ROTATION = n) if
rotation is not needed.
Choosing the rotation angle can be done in several ways:
1. boot option fbcon=rotate:n, where
n = 0 - normal
n = 1 - 90 degrees (clockwise)
n = 2 - 180 degrees (upside down)
n = 3 - 270 degrees (counterclockwise)
2. echo n > /sys/class/graphics/fb[num]/con_rotate
where n is the same as described above. It sets the angle of rotation
of the current console
3 echo n > /sys/class/graphics/fb[num]/con_rotate_all
where n is the same as described above. Globally sets the angle of
rotation.
GOTCHAS:
The option, especially at angles of 90 and 270 degrees, will exercise
the least used code of drivers. Namely, at these angles, panning is done
in the x-axis, so it can reveal bugs in the driver if xpanstep is set
incorrectly. A workaround is to set xpanstep = 0.
Secondly, at these angles, the framebuffer memory access can be
unaligned if (fontheight * bpp) % 32 ~= 0 which can reveal bugs in the drivers
imageblit, fillrect and copyarea functions. (I think cfbfillrect may have
this buglet). A workaround is to use a standard 8x16 font.
Speed:
The scrolling speed difference between 0 and 180 degrees is minimal,
somewhere areound 1-2%. At 90 or 270 degress, speed drops down to a vicinity
of 30-40%. This is understandable because the blit direction is across the
framebuffer "direction." Scrolling will be helped at these angles if xpanstep
is not equal to zero, use of 8x16 fonts, and setting xres_virtual >= xres * 2.
Note: The code is tested on little-endian only, so I don't know if it will
work in big-endian. Please let me know, it will take only less than a minute
of your time.
This patch prepares fbcon for console rotation and contains the following
changes:
- add rotate field in struct fbcon_ops to keep fbcon's current rotation
angle
- add con_rotate field in struct display to store per-display rotation angle
- create a private copy of the current var to fbcon. This will prevent
fbcon from directly manipulating info->var, especially the fields xoffset,
yoffset and vmode.
- add ability to swap pertinent axes (xres, yres; xpanstep, ypanstep; etc)
depending on the rotation angle
- change global update_var() (function that sets the screen start address)
as an fbcon method update_start. This is required because the axes, start
offset, and/or direction can be reversed depending on the rotation angle.
- add fbcon method rotate_font() which will rotate each character bitmap to
the correct angle of rotation.
- add fbcon boot option 'rotate' to select the angle of rotation at bootime.
Currently does nothing until all patches are applied.
Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-11-09 12:39:09 +07:00
|
|
|
|
|
|
|
|
ops->var.xoffset = 0;
|
|
|
|
|
ops->var.yoffset = p->yscroll * vc->vc_font.height;
|
|
|
|
|
ops->var.vmode &= ~FB_VMODE_YWRAP;
|
|
|
|
|
ops->update_start(info);
|
2005-04-17 05:20:36 +07:00
|
|
|
fbcon_clear_margins(vc, 1);
|
|
|
|
|
scrollback_max += count;
|
|
|
|
|
if (scrollback_max > scrollback_phys_max)
|
|
|
|
|
scrollback_max = scrollback_phys_max;
|
|
|
|
|
scrollback_current = 0;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static __inline__ void ypan_down(struct vc_data *vc, int count)
|
|
|
|
|
{
|
|
|
|
|
struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
|
|
|
|
|
struct display *p = &fb_display[vc->vc_num];
|
|
|
|
|
struct fbcon_ops *ops = info->fbcon_par;
|
|
|
|
|
|
|
|
|
|
p->yscroll -= count;
|
|
|
|
|
if (p->yscroll < 0) {
|
|
|
|
|
ops->bmove(vc, info, 0, 0, p->vrows - vc->vc_rows,
|
|
|
|
|
0, vc->vc_rows, vc->vc_cols);
|
|
|
|
|
p->yscroll += p->vrows - vc->vc_rows;
|
|
|
|
|
}
|
[PATCH] fbcon: Console Rotation - Prepare fbcon for console rotation
This patch series implements generic code to rotate the console at 90, 180,
and 270 degrees. The implementation is completely done in the framebuffer
console level, thus no changes to the framebuffer layer or to the drivers
are needed.
Console rotation is required by some Sharp-based devices where the natural
orientation of the display is not at 0 degrees. Also, users that have
displays that can pivot will benefit by having a console in portrait mode
if they so desire.
The choice to implement the code in the console layer rather than in the
framebuffer layer is due to the following reasons:
- it's fast
- it does not require driver changes
- it can coexist with devices that can rotate the display at the hardware level
- it complements graphics applications that can do display rotation
The changes to core fbcon are minimal-- recognition of the console
rotation angle so it can swap directions, origins and axes (xres vs yres,
xpanstep vs ypanstep, xoffset vs yoffset, etc) and storage of the rotation
angle per display. The bulk of the code that does the actual drawing to the
screen are placed in separate files. Each angle of rotation has separate
methods (bmove, clear, putcs, cursor, update_start which is derived from
update_var, and clear_margins). To mimimize processing time, the fontdata
are pre-rotated at each console switch (only if the font or the angle has
changed).
The option can be compiled out (CONFIG_FRAMEBUFFER_CONSOLE_ROTATION = n) if
rotation is not needed.
Choosing the rotation angle can be done in several ways:
1. boot option fbcon=rotate:n, where
n = 0 - normal
n = 1 - 90 degrees (clockwise)
n = 2 - 180 degrees (upside down)
n = 3 - 270 degrees (counterclockwise)
2. echo n > /sys/class/graphics/fb[num]/con_rotate
where n is the same as described above. It sets the angle of rotation
of the current console
3 echo n > /sys/class/graphics/fb[num]/con_rotate_all
where n is the same as described above. Globally sets the angle of
rotation.
GOTCHAS:
The option, especially at angles of 90 and 270 degrees, will exercise
the least used code of drivers. Namely, at these angles, panning is done
in the x-axis, so it can reveal bugs in the driver if xpanstep is set
incorrectly. A workaround is to set xpanstep = 0.
Secondly, at these angles, the framebuffer memory access can be
unaligned if (fontheight * bpp) % 32 ~= 0 which can reveal bugs in the drivers
imageblit, fillrect and copyarea functions. (I think cfbfillrect may have
this buglet). A workaround is to use a standard 8x16 font.
Speed:
The scrolling speed difference between 0 and 180 degrees is minimal,
somewhere areound 1-2%. At 90 or 270 degress, speed drops down to a vicinity
of 30-40%. This is understandable because the blit direction is across the
framebuffer "direction." Scrolling will be helped at these angles if xpanstep
is not equal to zero, use of 8x16 fonts, and setting xres_virtual >= xres * 2.
Note: The code is tested on little-endian only, so I don't know if it will
work in big-endian. Please let me know, it will take only less than a minute
of your time.
This patch prepares fbcon for console rotation and contains the following
changes:
- add rotate field in struct fbcon_ops to keep fbcon's current rotation
angle
- add con_rotate field in struct display to store per-display rotation angle
- create a private copy of the current var to fbcon. This will prevent
fbcon from directly manipulating info->var, especially the fields xoffset,
yoffset and vmode.
- add ability to swap pertinent axes (xres, yres; xpanstep, ypanstep; etc)
depending on the rotation angle
- change global update_var() (function that sets the screen start address)
as an fbcon method update_start. This is required because the axes, start
offset, and/or direction can be reversed depending on the rotation angle.
- add fbcon method rotate_font() which will rotate each character bitmap to
the correct angle of rotation.
- add fbcon boot option 'rotate' to select the angle of rotation at bootime.
Currently does nothing until all patches are applied.
Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-11-09 12:39:09 +07:00
|
|
|
|
|
|
|
|
ops->var.xoffset = 0;
|
|
|
|
|
ops->var.yoffset = p->yscroll * vc->vc_font.height;
|
|
|
|
|
ops->var.vmode &= ~FB_VMODE_YWRAP;
|
|
|
|
|
ops->update_start(info);
|
2005-04-17 05:20:36 +07:00
|
|
|
fbcon_clear_margins(vc, 1);
|
|
|
|
|
scrollback_max -= count;
|
|
|
|
|
if (scrollback_max < 0)
|
|
|
|
|
scrollback_max = 0;
|
|
|
|
|
scrollback_current = 0;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static __inline__ void ypan_down_redraw(struct vc_data *vc, int t, int count)
|
|
|
|
|
{
|
|
|
|
|
struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
|
[PATCH] fbcon: Console Rotation - Prepare fbcon for console rotation
This patch series implements generic code to rotate the console at 90, 180,
and 270 degrees. The implementation is completely done in the framebuffer
console level, thus no changes to the framebuffer layer or to the drivers
are needed.
Console rotation is required by some Sharp-based devices where the natural
orientation of the display is not at 0 degrees. Also, users that have
displays that can pivot will benefit by having a console in portrait mode
if they so desire.
The choice to implement the code in the console layer rather than in the
framebuffer layer is due to the following reasons:
- it's fast
- it does not require driver changes
- it can coexist with devices that can rotate the display at the hardware level
- it complements graphics applications that can do display rotation
The changes to core fbcon are minimal-- recognition of the console
rotation angle so it can swap directions, origins and axes (xres vs yres,
xpanstep vs ypanstep, xoffset vs yoffset, etc) and storage of the rotation
angle per display. The bulk of the code that does the actual drawing to the
screen are placed in separate files. Each angle of rotation has separate
methods (bmove, clear, putcs, cursor, update_start which is derived from
update_var, and clear_margins). To mimimize processing time, the fontdata
are pre-rotated at each console switch (only if the font or the angle has
changed).
The option can be compiled out (CONFIG_FRAMEBUFFER_CONSOLE_ROTATION = n) if
rotation is not needed.
Choosing the rotation angle can be done in several ways:
1. boot option fbcon=rotate:n, where
n = 0 - normal
n = 1 - 90 degrees (clockwise)
n = 2 - 180 degrees (upside down)
n = 3 - 270 degrees (counterclockwise)
2. echo n > /sys/class/graphics/fb[num]/con_rotate
where n is the same as described above. It sets the angle of rotation
of the current console
3 echo n > /sys/class/graphics/fb[num]/con_rotate_all
where n is the same as described above. Globally sets the angle of
rotation.
GOTCHAS:
The option, especially at angles of 90 and 270 degrees, will exercise
the least used code of drivers. Namely, at these angles, panning is done
in the x-axis, so it can reveal bugs in the driver if xpanstep is set
incorrectly. A workaround is to set xpanstep = 0.
Secondly, at these angles, the framebuffer memory access can be
unaligned if (fontheight * bpp) % 32 ~= 0 which can reveal bugs in the drivers
imageblit, fillrect and copyarea functions. (I think cfbfillrect may have
this buglet). A workaround is to use a standard 8x16 font.
Speed:
The scrolling speed difference between 0 and 180 degrees is minimal,
somewhere areound 1-2%. At 90 or 270 degress, speed drops down to a vicinity
of 30-40%. This is understandable because the blit direction is across the
framebuffer "direction." Scrolling will be helped at these angles if xpanstep
is not equal to zero, use of 8x16 fonts, and setting xres_virtual >= xres * 2.
Note: The code is tested on little-endian only, so I don't know if it will
work in big-endian. Please let me know, it will take only less than a minute
of your time.
This patch prepares fbcon for console rotation and contains the following
changes:
- add rotate field in struct fbcon_ops to keep fbcon's current rotation
angle
- add con_rotate field in struct display to store per-display rotation angle
- create a private copy of the current var to fbcon. This will prevent
fbcon from directly manipulating info->var, especially the fields xoffset,
yoffset and vmode.
- add ability to swap pertinent axes (xres, yres; xpanstep, ypanstep; etc)
depending on the rotation angle
- change global update_var() (function that sets the screen start address)
as an fbcon method update_start. This is required because the axes, start
offset, and/or direction can be reversed depending on the rotation angle.
- add fbcon method rotate_font() which will rotate each character bitmap to
the correct angle of rotation.
- add fbcon boot option 'rotate' to select the angle of rotation at bootime.
Currently does nothing until all patches are applied.
Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-11-09 12:39:09 +07:00
|
|
|
struct fbcon_ops *ops = info->fbcon_par;
|
2005-04-17 05:20:36 +07:00
|
|
|
struct display *p = &fb_display[vc->vc_num];
|
|
|
|
|
int redraw = 0;
|
|
|
|
|
|
|
|
|
|
p->yscroll -= count;
|
|
|
|
|
if (p->yscroll < 0) {
|
|
|
|
|
p->yscroll += p->vrows - vc->vc_rows;
|
|
|
|
|
redraw = 1;
|
|
|
|
|
}
|
[PATCH] fbcon: Console Rotation - Prepare fbcon for console rotation
This patch series implements generic code to rotate the console at 90, 180,
and 270 degrees. The implementation is completely done in the framebuffer
console level, thus no changes to the framebuffer layer or to the drivers
are needed.
Console rotation is required by some Sharp-based devices where the natural
orientation of the display is not at 0 degrees. Also, users that have
displays that can pivot will benefit by having a console in portrait mode
if they so desire.
The choice to implement the code in the console layer rather than in the
framebuffer layer is due to the following reasons:
- it's fast
- it does not require driver changes
- it can coexist with devices that can rotate the display at the hardware level
- it complements graphics applications that can do display rotation
The changes to core fbcon are minimal-- recognition of the console
rotation angle so it can swap directions, origins and axes (xres vs yres,
xpanstep vs ypanstep, xoffset vs yoffset, etc) and storage of the rotation
angle per display. The bulk of the code that does the actual drawing to the
screen are placed in separate files. Each angle of rotation has separate
methods (bmove, clear, putcs, cursor, update_start which is derived from
update_var, and clear_margins). To mimimize processing time, the fontdata
are pre-rotated at each console switch (only if the font or the angle has
changed).
The option can be compiled out (CONFIG_FRAMEBUFFER_CONSOLE_ROTATION = n) if
rotation is not needed.
Choosing the rotation angle can be done in several ways:
1. boot option fbcon=rotate:n, where
n = 0 - normal
n = 1 - 90 degrees (clockwise)
n = 2 - 180 degrees (upside down)
n = 3 - 270 degrees (counterclockwise)
2. echo n > /sys/class/graphics/fb[num]/con_rotate
where n is the same as described above. It sets the angle of rotation
of the current console
3 echo n > /sys/class/graphics/fb[num]/con_rotate_all
where n is the same as described above. Globally sets the angle of
rotation.
GOTCHAS:
The option, especially at angles of 90 and 270 degrees, will exercise
the least used code of drivers. Namely, at these angles, panning is done
in the x-axis, so it can reveal bugs in the driver if xpanstep is set
incorrectly. A workaround is to set xpanstep = 0.
Secondly, at these angles, the framebuffer memory access can be
unaligned if (fontheight * bpp) % 32 ~= 0 which can reveal bugs in the drivers
imageblit, fillrect and copyarea functions. (I think cfbfillrect may have
this buglet). A workaround is to use a standard 8x16 font.
Speed:
The scrolling speed difference between 0 and 180 degrees is minimal,
somewhere areound 1-2%. At 90 or 270 degress, speed drops down to a vicinity
of 30-40%. This is understandable because the blit direction is across the
framebuffer "direction." Scrolling will be helped at these angles if xpanstep
is not equal to zero, use of 8x16 fonts, and setting xres_virtual >= xres * 2.
Note: The code is tested on little-endian only, so I don't know if it will
work in big-endian. Please let me know, it will take only less than a minute
of your time.
This patch prepares fbcon for console rotation and contains the following
changes:
- add rotate field in struct fbcon_ops to keep fbcon's current rotation
angle
- add con_rotate field in struct display to store per-display rotation angle
- create a private copy of the current var to fbcon. This will prevent
fbcon from directly manipulating info->var, especially the fields xoffset,
yoffset and vmode.
- add ability to swap pertinent axes (xres, yres; xpanstep, ypanstep; etc)
depending on the rotation angle
- change global update_var() (function that sets the screen start address)
as an fbcon method update_start. This is required because the axes, start
offset, and/or direction can be reversed depending on the rotation angle.
- add fbcon method rotate_font() which will rotate each character bitmap to
the correct angle of rotation.
- add fbcon boot option 'rotate' to select the angle of rotation at bootime.
Currently does nothing until all patches are applied.
Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-11-09 12:39:09 +07:00
|
|
|
|
2005-04-17 05:20:36 +07:00
|
|
|
if (redraw)
|
|
|
|
|
fbcon_redraw_move(vc, p, t, vc->vc_rows - count, t + count);
|
[PATCH] fbcon: Console Rotation - Prepare fbcon for console rotation
This patch series implements generic code to rotate the console at 90, 180,
and 270 degrees. The implementation is completely done in the framebuffer
console level, thus no changes to the framebuffer layer or to the drivers
are needed.
Console rotation is required by some Sharp-based devices where the natural
orientation of the display is not at 0 degrees. Also, users that have
displays that can pivot will benefit by having a console in portrait mode
if they so desire.
The choice to implement the code in the console layer rather than in the
framebuffer layer is due to the following reasons:
- it's fast
- it does not require driver changes
- it can coexist with devices that can rotate the display at the hardware level
- it complements graphics applications that can do display rotation
The changes to core fbcon are minimal-- recognition of the console
rotation angle so it can swap directions, origins and axes (xres vs yres,
xpanstep vs ypanstep, xoffset vs yoffset, etc) and storage of the rotation
angle per display. The bulk of the code that does the actual drawing to the
screen are placed in separate files. Each angle of rotation has separate
methods (bmove, clear, putcs, cursor, update_start which is derived from
update_var, and clear_margins). To mimimize processing time, the fontdata
are pre-rotated at each console switch (only if the font or the angle has
changed).
The option can be compiled out (CONFIG_FRAMEBUFFER_CONSOLE_ROTATION = n) if
rotation is not needed.
Choosing the rotation angle can be done in several ways:
1. boot option fbcon=rotate:n, where
n = 0 - normal
n = 1 - 90 degrees (clockwise)
n = 2 - 180 degrees (upside down)
n = 3 - 270 degrees (counterclockwise)
2. echo n > /sys/class/graphics/fb[num]/con_rotate
where n is the same as described above. It sets the angle of rotation
of the current console
3 echo n > /sys/class/graphics/fb[num]/con_rotate_all
where n is the same as described above. Globally sets the angle of
rotation.
GOTCHAS:
The option, especially at angles of 90 and 270 degrees, will exercise
the least used code of drivers. Namely, at these angles, panning is done
in the x-axis, so it can reveal bugs in the driver if xpanstep is set
incorrectly. A workaround is to set xpanstep = 0.
Secondly, at these angles, the framebuffer memory access can be
unaligned if (fontheight * bpp) % 32 ~= 0 which can reveal bugs in the drivers
imageblit, fillrect and copyarea functions. (I think cfbfillrect may have
this buglet). A workaround is to use a standard 8x16 font.
Speed:
The scrolling speed difference between 0 and 180 degrees is minimal,
somewhere areound 1-2%. At 90 or 270 degress, speed drops down to a vicinity
of 30-40%. This is understandable because the blit direction is across the
framebuffer "direction." Scrolling will be helped at these angles if xpanstep
is not equal to zero, use of 8x16 fonts, and setting xres_virtual >= xres * 2.
Note: The code is tested on little-endian only, so I don't know if it will
work in big-endian. Please let me know, it will take only less than a minute
of your time.
This patch prepares fbcon for console rotation and contains the following
changes:
- add rotate field in struct fbcon_ops to keep fbcon's current rotation
angle
- add con_rotate field in struct display to store per-display rotation angle
- create a private copy of the current var to fbcon. This will prevent
fbcon from directly manipulating info->var, especially the fields xoffset,
yoffset and vmode.
- add ability to swap pertinent axes (xres, yres; xpanstep, ypanstep; etc)
depending on the rotation angle
- change global update_var() (function that sets the screen start address)
as an fbcon method update_start. This is required because the axes, start
offset, and/or direction can be reversed depending on the rotation angle.
- add fbcon method rotate_font() which will rotate each character bitmap to
the correct angle of rotation.
- add fbcon boot option 'rotate' to select the angle of rotation at bootime.
Currently does nothing until all patches are applied.
Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-11-09 12:39:09 +07:00
|
|
|
|
|
|
|
|
ops->var.xoffset = 0;
|
|
|
|
|
ops->var.yoffset = p->yscroll * vc->vc_font.height;
|
|
|
|
|
ops->var.vmode &= ~FB_VMODE_YWRAP;
|
|
|
|
|
ops->update_start(info);
|
2005-04-17 05:20:36 +07:00
|
|
|
fbcon_clear_margins(vc, 1);
|
|
|
|
|
scrollback_max -= count;
|
|
|
|
|
if (scrollback_max < 0)
|
|
|
|
|
scrollback_max = 0;
|
|
|
|
|
scrollback_current = 0;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static void fbcon_redraw_softback(struct vc_data *vc, struct display *p,
|
|
|
|
|
long delta)
|
|
|
|
|
{
|
|
|
|
|
int count = vc->vc_rows;
|
|
|
|
|
unsigned short *d, *s;
|
|
|
|
|
unsigned long n;
|
|
|
|
|
int line = 0;
|
|
|
|
|
|
|
|
|
|
d = (u16 *) softback_curr;
|
|
|
|
|
if (d == (u16 *) softback_in)
|
|
|
|
|
d = (u16 *) vc->vc_origin;
|
|
|
|
|
n = softback_curr + delta * vc->vc_size_row;
|
|
|
|
|
softback_lines -= delta;
|
|
|
|
|
if (delta < 0) {
|
|
|
|
|
if (softback_curr < softback_top && n < softback_buf) {
|
|
|
|
|
n += softback_end - softback_buf;
|
|
|
|
|
if (n < softback_top) {
|
|
|
|
|
softback_lines -=
|
|
|
|
|
(softback_top - n) / vc->vc_size_row;
|
|
|
|
|
n = softback_top;
|
|
|
|
|
}
|
|
|
|
|
} else if (softback_curr >= softback_top
|
|
|
|
|
&& n < softback_top) {
|
|
|
|
|
softback_lines -=
|
|
|
|
|
(softback_top - n) / vc->vc_size_row;
|
|
|
|
|
n = softback_top;
|
|
|
|
|
}
|
|
|
|
|
} else {
|
|
|
|
|
if (softback_curr > softback_in && n >= softback_end) {
|
|
|
|
|
n += softback_buf - softback_end;
|
|
|
|
|
if (n > softback_in) {
|
|
|
|
|
n = softback_in;
|
|
|
|
|
softback_lines = 0;
|
|
|
|
|
}
|
|
|
|
|
} else if (softback_curr <= softback_in && n > softback_in) {
|
|
|
|
|
n = softback_in;
|
|
|
|
|
softback_lines = 0;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
if (n == softback_curr)
|
|
|
|
|
return;
|
|
|
|
|
softback_curr = n;
|
|
|
|
|
s = (u16 *) softback_curr;
|
|
|
|
|
if (s == (u16 *) softback_in)
|
|
|
|
|
s = (u16 *) vc->vc_origin;
|
|
|
|
|
while (count--) {
|
|
|
|
|
unsigned short *start;
|
|
|
|
|
unsigned short *le;
|
|
|
|
|
unsigned short c;
|
|
|
|
|
int x = 0;
|
|
|
|
|
unsigned short attr = 1;
|
|
|
|
|
|
|
|
|
|
start = s;
|
|
|
|
|
le = advance_row(s, 1);
|
|
|
|
|
do {
|
|
|
|
|
c = scr_readw(s);
|
|
|
|
|
if (attr != (c & 0xff00)) {
|
|
|
|
|
attr = c & 0xff00;
|
|
|
|
|
if (s > start) {
|
|
|
|
|
fbcon_putcs(vc, start, s - start,
|
|
|
|
|
line, x);
|
|
|
|
|
x += s - start;
|
|
|
|
|
start = s;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
if (c == scr_readw(d)) {
|
|
|
|
|
if (s > start) {
|
|
|
|
|
fbcon_putcs(vc, start, s - start,
|
|
|
|
|
line, x);
|
|
|
|
|
x += s - start + 1;
|
|
|
|
|
start = s + 1;
|
|
|
|
|
} else {
|
|
|
|
|
x++;
|
|
|
|
|
start++;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
s++;
|
|
|
|
|
d++;
|
|
|
|
|
} while (s < le);
|
|
|
|
|
if (s > start)
|
|
|
|
|
fbcon_putcs(vc, start, s - start, line, x);
|
|
|
|
|
line++;
|
|
|
|
|
if (d == (u16 *) softback_end)
|
|
|
|
|
d = (u16 *) softback_buf;
|
|
|
|
|
if (d == (u16 *) softback_in)
|
|
|
|
|
d = (u16 *) vc->vc_origin;
|
|
|
|
|
if (s == (u16 *) softback_end)
|
|
|
|
|
s = (u16 *) softback_buf;
|
|
|
|
|
if (s == (u16 *) softback_in)
|
|
|
|
|
s = (u16 *) vc->vc_origin;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static void fbcon_redraw_move(struct vc_data *vc, struct display *p,
|
|
|
|
|
int line, int count, int dy)
|
|
|
|
|
{
|
|
|
|
|
unsigned short *s = (unsigned short *)
|
|
|
|
|
(vc->vc_origin + vc->vc_size_row * line);
|
|
|
|
|
|
|
|
|
|
while (count--) {
|
|
|
|
|
unsigned short *start = s;
|
|
|
|
|
unsigned short *le = advance_row(s, 1);
|
|
|
|
|
unsigned short c;
|
|
|
|
|
int x = 0;
|
|
|
|
|
unsigned short attr = 1;
|
|
|
|
|
|
|
|
|
|
do {
|
|
|
|
|
c = scr_readw(s);
|
|
|
|
|
if (attr != (c & 0xff00)) {
|
|
|
|
|
attr = c & 0xff00;
|
|
|
|
|
if (s > start) {
|
|
|
|
|
fbcon_putcs(vc, start, s - start,
|
|
|
|
|
dy, x);
|
|
|
|
|
x += s - start;
|
|
|
|
|
start = s;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
console_conditional_schedule();
|
|
|
|
|
s++;
|
|
|
|
|
} while (s < le);
|
|
|
|
|
if (s > start)
|
|
|
|
|
fbcon_putcs(vc, start, s - start, dy, x);
|
|
|
|
|
console_conditional_schedule();
|
|
|
|
|
dy++;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static void fbcon_redraw(struct vc_data *vc, struct display *p,
|
|
|
|
|
int line, int count, int offset)
|
|
|
|
|
{
|
|
|
|
|
unsigned short *d = (unsigned short *)
|
|
|
|
|
(vc->vc_origin + vc->vc_size_row * line);
|
|
|
|
|
unsigned short *s = d + offset;
|
|
|
|
|
|
|
|
|
|
while (count--) {
|
|
|
|
|
unsigned short *start = s;
|
|
|
|
|
unsigned short *le = advance_row(s, 1);
|
|
|
|
|
unsigned short c;
|
|
|
|
|
int x = 0;
|
|
|
|
|
unsigned short attr = 1;
|
|
|
|
|
|
|
|
|
|
do {
|
|
|
|
|
c = scr_readw(s);
|
|
|
|
|
if (attr != (c & 0xff00)) {
|
|
|
|
|
attr = c & 0xff00;
|
|
|
|
|
if (s > start) {
|
|
|
|
|
fbcon_putcs(vc, start, s - start,
|
|
|
|
|
line, x);
|
|
|
|
|
x += s - start;
|
|
|
|
|
start = s;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
if (c == scr_readw(d)) {
|
|
|
|
|
if (s > start) {
|
|
|
|
|
fbcon_putcs(vc, start, s - start,
|
|
|
|
|
line, x);
|
|
|
|
|
x += s - start + 1;
|
|
|
|
|
start = s + 1;
|
|
|
|
|
} else {
|
|
|
|
|
x++;
|
|
|
|
|
start++;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
scr_writew(c, d);
|
|
|
|
|
console_conditional_schedule();
|
|
|
|
|
s++;
|
|
|
|
|
d++;
|
|
|
|
|
} while (s < le);
|
|
|
|
|
if (s > start)
|
|
|
|
|
fbcon_putcs(vc, start, s - start, line, x);
|
|
|
|
|
console_conditional_schedule();
|
|
|
|
|
if (offset > 0)
|
|
|
|
|
line++;
|
|
|
|
|
else {
|
|
|
|
|
line--;
|
|
|
|
|
/* NOTE: We subtract two lines from these pointers */
|
|
|
|
|
s -= vc->vc_size_row;
|
|
|
|
|
d -= vc->vc_size_row;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static inline void fbcon_softback_note(struct vc_data *vc, int t,
|
|
|
|
|
int count)
|
|
|
|
|
{
|
|
|
|
|
unsigned short *p;
|
|
|
|
|
|
|
|
|
|
if (vc->vc_num != fg_console)
|
|
|
|
|
return;
|
|
|
|
|
p = (unsigned short *) (vc->vc_origin + t * vc->vc_size_row);
|
|
|
|
|
|
|
|
|
|
while (count) {
|
|
|
|
|
scr_memcpyw((u16 *) softback_in, p, vc->vc_size_row);
|
|
|
|
|
count--;
|
|
|
|
|
p = advance_row(p, 1);
|
|
|
|
|
softback_in += vc->vc_size_row;
|
|
|
|
|
if (softback_in == softback_end)
|
|
|
|
|
softback_in = softback_buf;
|
|
|
|
|
if (softback_in == softback_top) {
|
|
|
|
|
softback_top += vc->vc_size_row;
|
|
|
|
|
if (softback_top == softback_end)
|
|
|
|
|
softback_top = softback_buf;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
softback_curr = softback_in;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static int fbcon_scroll(struct vc_data *vc, int t, int b, int dir,
|
|
|
|
|
int count)
|
|
|
|
|
{
|
|
|
|
|
struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
|
|
|
|
|
struct display *p = &fb_display[vc->vc_num];
|
|
|
|
|
struct fbcon_ops *ops = info->fbcon_par;
|
|
|
|
|
int scroll_partial = info->flags & FBINFO_PARTIAL_PAN_OK;
|
|
|
|
|
|
|
|
|
|
if (fbcon_is_inactive(vc, info))
|
|
|
|
|
return -EINVAL;
|
|
|
|
|
|
|
|
|
|
fbcon_cursor(vc, CM_ERASE);
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* ++Geert: Only use ywrap/ypan if the console is in text mode
|
|
|
|
|
* ++Andrew: Only use ypan on hardware text mode when scrolling the
|
|
|
|
|
* whole screen (prevents flicker).
|
|
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
switch (dir) {
|
|
|
|
|
case SM_UP:
|
|
|
|
|
if (count > vc->vc_rows) /* Maximum realistic size */
|
|
|
|
|
count = vc->vc_rows;
|
|
|
|
|
if (softback_top)
|
|
|
|
|
fbcon_softback_note(vc, t, count);
|
|
|
|
|
if (logo_shown >= 0)
|
|
|
|
|
goto redraw_up;
|
|
|
|
|
switch (p->scrollmode) {
|
|
|
|
|
case SCROLL_MOVE:
|
|
|
|
|
ops->bmove(vc, info, t + count, 0, t, 0,
|
|
|
|
|
b - t - count, vc->vc_cols);
|
|
|
|
|
ops->clear(vc, info, b - count, 0, count,
|
|
|
|
|
vc->vc_cols);
|
|
|
|
|
break;
|
|
|
|
|
|
|
|
|
|
case SCROLL_WRAP_MOVE:
|
|
|
|
|
if (b - t - count > 3 * vc->vc_rows >> 2) {
|
|
|
|
|
if (t > 0)
|
|
|
|
|
fbcon_bmove(vc, 0, 0, count, 0, t,
|
|
|
|
|
vc->vc_cols);
|
|
|
|
|
ywrap_up(vc, count);
|
|
|
|
|
if (vc->vc_rows - b > 0)
|
|
|
|
|
fbcon_bmove(vc, b - count, 0, b, 0,
|
|
|
|
|
vc->vc_rows - b,
|
|
|
|
|
vc->vc_cols);
|
|
|
|
|
} else if (info->flags & FBINFO_READS_FAST)
|
|
|
|
|
fbcon_bmove(vc, t + count, 0, t, 0,
|
|
|
|
|
b - t - count, vc->vc_cols);
|
|
|
|
|
else
|
|
|
|
|
goto redraw_up;
|
|
|
|
|
fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
|
|
|
|
|
break;
|
|
|
|
|
|
|
|
|
|
case SCROLL_PAN_REDRAW:
|
|
|
|
|
if ((p->yscroll + count <=
|
|
|
|
|
2 * (p->vrows - vc->vc_rows))
|
|
|
|
|
&& ((!scroll_partial && (b - t == vc->vc_rows))
|
|
|
|
|
|| (scroll_partial
|
|
|
|
|
&& (b - t - count >
|
|
|
|
|
3 * vc->vc_rows >> 2)))) {
|
|
|
|
|
if (t > 0)
|
|
|
|
|
fbcon_redraw_move(vc, p, 0, t, count);
|
|
|
|
|
ypan_up_redraw(vc, t, count);
|
|
|
|
|
if (vc->vc_rows - b > 0)
|
|
|
|
|
fbcon_redraw_move(vc, p, b - count,
|
|
|
|
|
vc->vc_rows - b, b);
|
|
|
|
|
} else
|
|
|
|
|
fbcon_redraw_move(vc, p, t + count, b - t - count, t);
|
|
|
|
|
fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
|
|
|
|
|
break;
|
|
|
|
|
|
|
|
|
|
case SCROLL_PAN_MOVE:
|
|
|
|
|
if ((p->yscroll + count <=
|
|
|
|
|
2 * (p->vrows - vc->vc_rows))
|
|
|
|
|
&& ((!scroll_partial && (b - t == vc->vc_rows))
|
|
|
|
|
|| (scroll_partial
|
|
|
|
|
&& (b - t - count >
|
|
|
|
|
3 * vc->vc_rows >> 2)))) {
|
|
|
|
|
if (t > 0)
|
|
|
|
|
fbcon_bmove(vc, 0, 0, count, 0, t,
|
|
|
|
|
vc->vc_cols);
|
|
|
|
|
ypan_up(vc, count);
|
|
|
|
|
if (vc->vc_rows - b > 0)
|
|
|
|
|
fbcon_bmove(vc, b - count, 0, b, 0,
|
|
|
|
|
vc->vc_rows - b,
|
|
|
|
|
vc->vc_cols);
|
|
|
|
|
} else if (info->flags & FBINFO_READS_FAST)
|
|
|
|
|
fbcon_bmove(vc, t + count, 0, t, 0,
|
|
|
|
|
b - t - count, vc->vc_cols);
|
|
|
|
|
else
|
|
|
|
|
goto redraw_up;
|
|
|
|
|
fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
|
|
|
|
|
break;
|
|
|
|
|
|
|
|
|
|
case SCROLL_REDRAW:
|
|
|
|
|
redraw_up:
|
|
|
|
|
fbcon_redraw(vc, p, t, b - t - count,
|
|
|
|
|
count * vc->vc_cols);
|
|
|
|
|
fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
|
|
|
|
|
scr_memsetw((unsigned short *) (vc->vc_origin +
|
|
|
|
|
vc->vc_size_row *
|
|
|
|
|
(b - count)),
|
|
|
|
|
vc->vc_video_erase_char,
|
|
|
|
|
vc->vc_size_row * count);
|
|
|
|
|
return 1;
|
|
|
|
|
}
|
|
|
|
|
break;
|
|
|
|
|
|
|
|
|
|
case SM_DOWN:
|
|
|
|
|
if (count > vc->vc_rows) /* Maximum realistic size */
|
|
|
|
|
count = vc->vc_rows;
|
2005-09-13 15:25:43 +07:00
|
|
|
if (logo_shown >= 0)
|
|
|
|
|
goto redraw_down;
|
2005-04-17 05:20:36 +07:00
|
|
|
switch (p->scrollmode) {
|
|
|
|
|
case SCROLL_MOVE:
|
|
|
|
|
ops->bmove(vc, info, t, 0, t + count, 0,
|
|
|
|
|
b - t - count, vc->vc_cols);
|
|
|
|
|
ops->clear(vc, info, t, 0, count, vc->vc_cols);
|
|
|
|
|
break;
|
|
|
|
|
|
|
|
|
|
case SCROLL_WRAP_MOVE:
|
|
|
|
|
if (b - t - count > 3 * vc->vc_rows >> 2) {
|
|
|
|
|
if (vc->vc_rows - b > 0)
|
|
|
|
|
fbcon_bmove(vc, b, 0, b - count, 0,
|
|
|
|
|
vc->vc_rows - b,
|
|
|
|
|
vc->vc_cols);
|
|
|
|
|
ywrap_down(vc, count);
|
|
|
|
|
if (t > 0)
|
|
|
|
|
fbcon_bmove(vc, count, 0, 0, 0, t,
|
|
|
|
|
vc->vc_cols);
|
|
|
|
|
} else if (info->flags & FBINFO_READS_FAST)
|
|
|
|
|
fbcon_bmove(vc, t, 0, t + count, 0,
|
|
|
|
|
b - t - count, vc->vc_cols);
|
|
|
|
|
else
|
|
|
|
|
goto redraw_down;
|
|
|
|
|
fbcon_clear(vc, t, 0, count, vc->vc_cols);
|
|
|
|
|
break;
|
|
|
|
|
|
|
|
|
|
case SCROLL_PAN_MOVE:
|
|
|
|
|
if ((count - p->yscroll <= p->vrows - vc->vc_rows)
|
|
|
|
|
&& ((!scroll_partial && (b - t == vc->vc_rows))
|
|
|
|
|
|| (scroll_partial
|
|
|
|
|
&& (b - t - count >
|
|
|
|
|
3 * vc->vc_rows >> 2)))) {
|
|
|
|
|
if (vc->vc_rows - b > 0)
|
|
|
|
|
fbcon_bmove(vc, b, 0, b - count, 0,
|
|
|
|
|
vc->vc_rows - b,
|
|
|
|
|
vc->vc_cols);
|
|
|
|
|
ypan_down(vc, count);
|
|
|
|
|
if (t > 0)
|
|
|
|
|
fbcon_bmove(vc, count, 0, 0, 0, t,
|
|
|
|
|
vc->vc_cols);
|
|
|
|
|
} else if (info->flags & FBINFO_READS_FAST)
|
|
|
|
|
fbcon_bmove(vc, t, 0, t + count, 0,
|
|
|
|
|
b - t - count, vc->vc_cols);
|
|
|
|
|
else
|
|
|
|
|
goto redraw_down;
|
|
|
|
|
fbcon_clear(vc, t, 0, count, vc->vc_cols);
|
|
|
|
|
break;
|
|
|
|
|
|
|
|
|
|
case SCROLL_PAN_REDRAW:
|
|
|
|
|
if ((count - p->yscroll <= p->vrows - vc->vc_rows)
|
|
|
|
|
&& ((!scroll_partial && (b - t == vc->vc_rows))
|
|
|
|
|
|| (scroll_partial
|
|
|
|
|
&& (b - t - count >
|
|
|
|
|
3 * vc->vc_rows >> 2)))) {
|
|
|
|
|
if (vc->vc_rows - b > 0)
|
|
|
|
|
fbcon_redraw_move(vc, p, b, vc->vc_rows - b,
|
|
|
|
|
b - count);
|
|
|
|
|
ypan_down_redraw(vc, t, count);
|
|
|
|
|
if (t > 0)
|
|
|
|
|
fbcon_redraw_move(vc, p, count, t, 0);
|
|
|
|
|
} else
|
|
|
|
|
fbcon_redraw_move(vc, p, t, b - t - count, t + count);
|
|
|
|
|
fbcon_clear(vc, t, 0, count, vc->vc_cols);
|
|
|
|
|
break;
|
|
|
|
|
|
|
|
|
|
case SCROLL_REDRAW:
|
|
|
|
|
redraw_down:
|
|
|
|
|
fbcon_redraw(vc, p, b - 1, b - t - count,
|
|
|
|
|
-count * vc->vc_cols);
|
|
|
|
|
fbcon_clear(vc, t, 0, count, vc->vc_cols);
|
|
|
|
|
scr_memsetw((unsigned short *) (vc->vc_origin +
|
|
|
|
|
vc->vc_size_row *
|
|
|
|
|
t),
|
|
|
|
|
vc->vc_video_erase_char,
|
|
|
|
|
vc->vc_size_row * count);
|
|
|
|
|
return 1;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
return 0;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
static void fbcon_bmove(struct vc_data *vc, int sy, int sx, int dy, int dx,
|
|
|
|
|
int height, int width)
|
|
|
|
|
{
|
|
|
|
|
struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
|
|
|
|
|
struct display *p = &fb_display[vc->vc_num];
|
|
|
|
|
|
|
|
|
|
if (fbcon_is_inactive(vc, info))
|
|
|
|
|
return;
|
|
|
|
|
|
|
|
|
|
if (!width || !height)
|
|
|
|
|
return;
|
|
|
|
|
|
|
|
|
|
/* Split blits that cross physical y_wrap case.
|
|
|
|
|
* Pathological case involves 4 blits, better to use recursive
|
|
|
|
|
* code rather than unrolled case
|
|
|
|
|
*
|
|
|
|
|
* Recursive invocations don't need to erase the cursor over and
|
|
|
|
|
* over again, so we use fbcon_bmove_rec()
|
|
|
|
|
*/
|
|
|
|
|
fbcon_bmove_rec(vc, p, sy, sx, dy, dx, height, width,
|
|
|
|
|
p->vrows - p->yscroll);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static void fbcon_bmove_rec(struct vc_data *vc, struct display *p, int sy, int sx,
|
|
|
|
|
int dy, int dx, int height, int width, u_int y_break)
|
|
|
|
|
{
|
|
|
|
|
struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
|
|
|
|
|
struct fbcon_ops *ops = info->fbcon_par;
|
|
|
|
|
u_int b;
|
|
|
|
|
|
|
|
|
|
if (sy < y_break && sy + height > y_break) {
|
|
|
|
|
b = y_break - sy;
|
|
|
|
|
if (dy < sy) { /* Avoid trashing self */
|
|
|
|
|
fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
|
|
|
|
|
y_break);
|
|
|
|
|
fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
|
|
|
|
|
height - b, width, y_break);
|
|
|
|
|
} else {
|
|
|
|
|
fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
|
|
|
|
|
height - b, width, y_break);
|
|
|
|
|
fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
|
|
|
|
|
y_break);
|
|
|
|
|
}
|
|
|
|
|
return;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if (dy < y_break && dy + height > y_break) {
|
|
|
|
|
b = y_break - dy;
|
|
|
|
|
if (dy < sy) { /* Avoid trashing self */
|
|
|
|
|
fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
|
|
|
|
|
y_break);
|
|
|
|
|
fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
|
|
|
|
|
height - b, width, y_break);
|
|
|
|
|
} else {
|
|
|
|
|
fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
|
|
|
|
|
height - b, width, y_break);
|
|
|
|
|
fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
|
|
|
|
|
y_break);
|
|
|
|
|
}
|
|
|
|
|
return;
|
|
|
|
|
}
|
|
|
|
|
ops->bmove(vc, info, real_y(p, sy), sx, real_y(p, dy), dx,
|
|
|
|
|
height, width);
|
|
|
|
|
}
|
|
|
|
|
|
[PATCH] fbcon: Console Rotation - Prepare fbcon for console rotation
This patch series implements generic code to rotate the console at 90, 180,
and 270 degrees. The implementation is completely done in the framebuffer
console level, thus no changes to the framebuffer layer or to the drivers
are needed.
Console rotation is required by some Sharp-based devices where the natural
orientation of the display is not at 0 degrees. Also, users that have
displays that can pivot will benefit by having a console in portrait mode
if they so desire.
The choice to implement the code in the console layer rather than in the
framebuffer layer is due to the following reasons:
- it's fast
- it does not require driver changes
- it can coexist with devices that can rotate the display at the hardware level
- it complements graphics applications that can do display rotation
The changes to core fbcon are minimal-- recognition of the console
rotation angle so it can swap directions, origins and axes (xres vs yres,
xpanstep vs ypanstep, xoffset vs yoffset, etc) and storage of the rotation
angle per display. The bulk of the code that does the actual drawing to the
screen are placed in separate files. Each angle of rotation has separate
methods (bmove, clear, putcs, cursor, update_start which is derived from
update_var, and clear_margins). To mimimize processing time, the fontdata
are pre-rotated at each console switch (only if the font or the angle has
changed).
The option can be compiled out (CONFIG_FRAMEBUFFER_CONSOLE_ROTATION = n) if
rotation is not needed.
Choosing the rotation angle can be done in several ways:
1. boot option fbcon=rotate:n, where
n = 0 - normal
n = 1 - 90 degrees (clockwise)
n = 2 - 180 degrees (upside down)
n = 3 - 270 degrees (counterclockwise)
2. echo n > /sys/class/graphics/fb[num]/con_rotate
where n is the same as described above. It sets the angle of rotation
of the current console
3 echo n > /sys/class/graphics/fb[num]/con_rotate_all
where n is the same as described above. Globally sets the angle of
rotation.
GOTCHAS:
The option, especially at angles of 90 and 270 degrees, will exercise
the least used code of drivers. Namely, at these angles, panning is done
in the x-axis, so it can reveal bugs in the driver if xpanstep is set
incorrectly. A workaround is to set xpanstep = 0.
Secondly, at these angles, the framebuffer memory access can be
unaligned if (fontheight * bpp) % 32 ~= 0 which can reveal bugs in the drivers
imageblit, fillrect and copyarea functions. (I think cfbfillrect may have
this buglet). A workaround is to use a standard 8x16 font.
Speed:
The scrolling speed difference between 0 and 180 degrees is minimal,
somewhere areound 1-2%. At 90 or 270 degress, speed drops down to a vicinity
of 30-40%. This is understandable because the blit direction is across the
framebuffer "direction." Scrolling will be helped at these angles if xpanstep
is not equal to zero, use of 8x16 fonts, and setting xres_virtual >= xres * 2.
Note: The code is tested on little-endian only, so I don't know if it will
work in big-endian. Please let me know, it will take only less than a minute
of your time.
This patch prepares fbcon for console rotation and contains the following
changes:
- add rotate field in struct fbcon_ops to keep fbcon's current rotation
angle
- add con_rotate field in struct display to store per-display rotation angle
- create a private copy of the current var to fbcon. This will prevent
fbcon from directly manipulating info->var, especially the fields xoffset,
yoffset and vmode.
- add ability to swap pertinent axes (xres, yres; xpanstep, ypanstep; etc)
depending on the rotation angle
- change global update_var() (function that sets the screen start address)
as an fbcon method update_start. This is required because the axes, start
offset, and/or direction can be reversed depending on the rotation angle.
- add fbcon method rotate_font() which will rotate each character bitmap to
the correct angle of rotation.
- add fbcon boot option 'rotate' to select the angle of rotation at bootime.
Currently does nothing until all patches are applied.
Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-11-09 12:39:09 +07:00
|
|
|
static __inline__ void updatescrollmode(struct display *p,
|
|
|
|
|
struct fb_info *info,
|
2005-04-17 05:20:36 +07:00
|
|
|
struct vc_data *vc)
|
|
|
|
|
{
|
[PATCH] fbcon: Console Rotation - Prepare fbcon for console rotation
This patch series implements generic code to rotate the console at 90, 180,
and 270 degrees. The implementation is completely done in the framebuffer
console level, thus no changes to the framebuffer layer or to the drivers
are needed.
Console rotation is required by some Sharp-based devices where the natural
orientation of the display is not at 0 degrees. Also, users that have
displays that can pivot will benefit by having a console in portrait mode
if they so desire.
The choice to implement the code in the console layer rather than in the
framebuffer layer is due to the following reasons:
- it's fast
- it does not require driver changes
- it can coexist with devices that can rotate the display at the hardware level
- it complements graphics applications that can do display rotation
The changes to core fbcon are minimal-- recognition of the console
rotation angle so it can swap directions, origins and axes (xres vs yres,
xpanstep vs ypanstep, xoffset vs yoffset, etc) and storage of the rotation
angle per display. The bulk of the code that does the actual drawing to the
screen are placed in separate files. Each angle of rotation has separate
methods (bmove, clear, putcs, cursor, update_start which is derived from
update_var, and clear_margins). To mimimize processing time, the fontdata
are pre-rotated at each console switch (only if the font or the angle has
changed).
The option can be compiled out (CONFIG_FRAMEBUFFER_CONSOLE_ROTATION = n) if
rotation is not needed.
Choosing the rotation angle can be done in several ways:
1. boot option fbcon=rotate:n, where
n = 0 - normal
n = 1 - 90 degrees (clockwise)
n = 2 - 180 degrees (upside down)
n = 3 - 270 degrees (counterclockwise)
2. echo n > /sys/class/graphics/fb[num]/con_rotate
where n is the same as described above. It sets the angle of rotation
of the current console
3 echo n > /sys/class/graphics/fb[num]/con_rotate_all
where n is the same as described above. Globally sets the angle of
rotation.
GOTCHAS:
The option, especially at angles of 90 and 270 degrees, will exercise
the least used code of drivers. Namely, at these angles, panning is done
in the x-axis, so it can reveal bugs in the driver if xpanstep is set
incorrectly. A workaround is to set xpanstep = 0.
Secondly, at these angles, the framebuffer memory access can be
unaligned if (fontheight * bpp) % 32 ~= 0 which can reveal bugs in the drivers
imageblit, fillrect and copyarea functions. (I think cfbfillrect may have
this buglet). A workaround is to use a standard 8x16 font.
Speed:
The scrolling speed difference between 0 and 180 degrees is minimal,
somewhere areound 1-2%. At 90 or 270 degress, speed drops down to a vicinity
of 30-40%. This is understandable because the blit direction is across the
framebuffer "direction." Scrolling will be helped at these angles if xpanstep
is not equal to zero, use of 8x16 fonts, and setting xres_virtual >= xres * 2.
Note: The code is tested on little-endian only, so I don't know if it will
work in big-endian. Please let me know, it will take only less than a minute
of your time.
This patch prepares fbcon for console rotation and contains the following
changes:
- add rotate field in struct fbcon_ops to keep fbcon's current rotation
angle
- add con_rotate field in struct display to store per-display rotation angle
- create a private copy of the current var to fbcon. This will prevent
fbcon from directly manipulating info->var, especially the fields xoffset,
yoffset and vmode.
- add ability to swap pertinent axes (xres, yres; xpanstep, ypanstep; etc)
depending on the rotation angle
- change global update_var() (function that sets the screen start address)
as an fbcon method update_start. This is required because the axes, start
offset, and/or direction can be reversed depending on the rotation angle.
- add fbcon method rotate_font() which will rotate each character bitmap to
the correct angle of rotation.
- add fbcon boot option 'rotate' to select the angle of rotation at bootime.
Currently does nothing until all patches are applied.
Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-11-09 12:39:09 +07:00
|
|
|
struct fbcon_ops *ops = info->fbcon_par;
|
2005-04-17 05:20:36 +07:00
|
|
|
int fh = vc->vc_font.height;
|
|
|
|
|
int cap = info->flags;
|
[PATCH] fbcon: Console Rotation - Prepare fbcon for console rotation
This patch series implements generic code to rotate the console at 90, 180,
and 270 degrees. The implementation is completely done in the framebuffer
console level, thus no changes to the framebuffer layer or to the drivers
are needed.
Console rotation is required by some Sharp-based devices where the natural
orientation of the display is not at 0 degrees. Also, users that have
displays that can pivot will benefit by having a console in portrait mode
if they so desire.
The choice to implement the code in the console layer rather than in the
framebuffer layer is due to the following reasons:
- it's fast
- it does not require driver changes
- it can coexist with devices that can rotate the display at the hardware level
- it complements graphics applications that can do display rotation
The changes to core fbcon are minimal-- recognition of the console
rotation angle so it can swap directions, origins and axes (xres vs yres,
xpanstep vs ypanstep, xoffset vs yoffset, etc) and storage of the rotation
angle per display. The bulk of the code that does the actual drawing to the
screen are placed in separate files. Each angle of rotation has separate
methods (bmove, clear, putcs, cursor, update_start which is derived from
update_var, and clear_margins). To mimimize processing time, the fontdata
are pre-rotated at each console switch (only if the font or the angle has
changed).
The option can be compiled out (CONFIG_FRAMEBUFFER_CONSOLE_ROTATION = n) if
rotation is not needed.
Choosing the rotation angle can be done in several ways:
1. boot option fbcon=rotate:n, where
n = 0 - normal
n = 1 - 90 degrees (clockwise)
n = 2 - 180 degrees (upside down)
n = 3 - 270 degrees (counterclockwise)
2. echo n > /sys/class/graphics/fb[num]/con_rotate
where n is the same as described above. It sets the angle of rotation
of the current console
3 echo n > /sys/class/graphics/fb[num]/con_rotate_all
where n is the same as described above. Globally sets the angle of
rotation.
GOTCHAS:
The option, especially at angles of 90 and 270 degrees, will exercise
the least used code of drivers. Namely, at these angles, panning is done
in the x-axis, so it can reveal bugs in the driver if xpanstep is set
incorrectly. A workaround is to set xpanstep = 0.
Secondly, at these angles, the framebuffer memory access can be
unaligned if (fontheight * bpp) % 32 ~= 0 which can reveal bugs in the drivers
imageblit, fillrect and copyarea functions. (I think cfbfillrect may have
this buglet). A workaround is to use a standard 8x16 font.
Speed:
The scrolling speed difference between 0 and 180 degrees is minimal,
somewhere areound 1-2%. At 90 or 270 degress, speed drops down to a vicinity
of 30-40%. This is understandable because the blit direction is across the
framebuffer "direction." Scrolling will be helped at these angles if xpanstep
is not equal to zero, use of 8x16 fonts, and setting xres_virtual >= xres * 2.
Note: The code is tested on little-endian only, so I don't know if it will
work in big-endian. Please let me know, it will take only less than a minute
of your time.
This patch prepares fbcon for console rotation and contains the following
changes:
- add rotate field in struct fbcon_ops to keep fbcon's current rotation
angle
- add con_rotate field in struct display to store per-display rotation angle
- create a private copy of the current var to fbcon. This will prevent
fbcon from directly manipulating info->var, especially the fields xoffset,
yoffset and vmode.
- add ability to swap pertinent axes (xres, yres; xpanstep, ypanstep; etc)
depending on the rotation angle
- change global update_var() (function that sets the screen start address)
as an fbcon method update_start. This is required because the axes, start
offset, and/or direction can be reversed depending on the rotation angle.
- add fbcon method rotate_font() which will rotate each character bitmap to
the correct angle of rotation.
- add fbcon boot option 'rotate' to select the angle of rotation at bootime.
Currently does nothing until all patches are applied.
Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-11-09 12:39:09 +07:00
|
|
|
u16 t = 0;
|
|
|
|
|
int ypan = FBCON_SWAP(ops->rotate, info->fix.ypanstep,
|
|
|
|
|
info->fix.xpanstep);
|
|
|
|
|
int ywrap = FBCON_SWAP(ops->rotate, info->fix.ywrapstep, t);
|
|
|
|
|
int yres = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
|
|
|
|
|
int vyres = FBCON_SWAP(ops->rotate, info->var.yres_virtual,
|
|
|
|
|
info->var.xres_virtual);
|
|
|
|
|
int good_pan = (cap & FBINFO_HWACCEL_YPAN) &&
|
|
|
|
|
divides(ypan, vc->vc_font.height) && vyres > yres;
|
|
|
|
|
int good_wrap = (cap & FBINFO_HWACCEL_YWRAP) &&
|
|
|
|
|
divides(ywrap, vc->vc_font.height) &&
|
|
|
|
|
divides(vc->vc_font.height, vyres);
|
2005-04-17 05:20:36 +07:00
|
|
|
int reading_fast = cap & FBINFO_READS_FAST;
|
[PATCH] fbcon: Console Rotation - Prepare fbcon for console rotation
This patch series implements generic code to rotate the console at 90, 180,
and 270 degrees. The implementation is completely done in the framebuffer
console level, thus no changes to the framebuffer layer or to the drivers
are needed.
Console rotation is required by some Sharp-based devices where the natural
orientation of the display is not at 0 degrees. Also, users that have
displays that can pivot will benefit by having a console in portrait mode
if they so desire.
The choice to implement the code in the console layer rather than in the
framebuffer layer is due to the following reasons:
- it's fast
- it does not require driver changes
- it can coexist with devices that can rotate the display at the hardware level
- it complements graphics applications that can do display rotation
The changes to core fbcon are minimal-- recognition of the console
rotation angle so it can swap directions, origins and axes (xres vs yres,
xpanstep vs ypanstep, xoffset vs yoffset, etc) and storage of the rotation
angle per display. The bulk of the code that does the actual drawing to the
screen are placed in separate files. Each angle of rotation has separate
methods (bmove, clear, putcs, cursor, update_start which is derived from
update_var, and clear_margins). To mimimize processing time, the fontdata
are pre-rotated at each console switch (only if the font or the angle has
changed).
The option can be compiled out (CONFIG_FRAMEBUFFER_CONSOLE_ROTATION = n) if
rotation is not needed.
Choosing the rotation angle can be done in several ways:
1. boot option fbcon=rotate:n, where
n = 0 - normal
n = 1 - 90 degrees (clockwise)
n = 2 - 180 degrees (upside down)
n = 3 - 270 degrees (counterclockwise)
2. echo n > /sys/class/graphics/fb[num]/con_rotate
where n is the same as described above. It sets the angle of rotation
of the current console
3 echo n > /sys/class/graphics/fb[num]/con_rotate_all
where n is the same as described above. Globally sets the angle of
rotation.
GOTCHAS:
The option, especially at angles of 90 and 270 degrees, will exercise
the least used code of drivers. Namely, at these angles, panning is done
in the x-axis, so it can reveal bugs in the driver if xpanstep is set
incorrectly. A workaround is to set xpanstep = 0.
Secondly, at these angles, the framebuffer memory access can be
unaligned if (fontheight * bpp) % 32 ~= 0 which can reveal bugs in the drivers
imageblit, fillrect and copyarea functions. (I think cfbfillrect may have
this buglet). A workaround is to use a standard 8x16 font.
Speed:
The scrolling speed difference between 0 and 180 degrees is minimal,
somewhere areound 1-2%. At 90 or 270 degress, speed drops down to a vicinity
of 30-40%. This is understandable because the blit direction is across the
framebuffer "direction." Scrolling will be helped at these angles if xpanstep
is not equal to zero, use of 8x16 fonts, and setting xres_virtual >= xres * 2.
Note: The code is tested on little-endian only, so I don't know if it will
work in big-endian. Please let me know, it will take only less than a minute
of your time.
This patch prepares fbcon for console rotation and contains the following
changes:
- add rotate field in struct fbcon_ops to keep fbcon's current rotation
angle
- add con_rotate field in struct display to store per-display rotation angle
- create a private copy of the current var to fbcon. This will prevent
fbcon from directly manipulating info->var, especially the fields xoffset,
yoffset and vmode.
- add ability to swap pertinent axes (xres, yres; xpanstep, ypanstep; etc)
depending on the rotation angle
- change global update_var() (function that sets the screen start address)
as an fbcon method update_start. This is required because the axes, start
offset, and/or direction can be reversed depending on the rotation angle.
- add fbcon method rotate_font() which will rotate each character bitmap to
the correct angle of rotation.
- add fbcon boot option 'rotate' to select the angle of rotation at bootime.
Currently does nothing until all patches are applied.
Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-11-09 12:39:09 +07:00
|
|
|
int fast_copyarea = (cap & FBINFO_HWACCEL_COPYAREA) &&
|
|
|
|
|
!(cap & FBINFO_HWACCEL_DISABLED);
|
|
|
|
|
int fast_imageblit = (cap & FBINFO_HWACCEL_IMAGEBLIT) &&
|
|
|
|
|
!(cap & FBINFO_HWACCEL_DISABLED);
|
|
|
|
|
|
|
|
|
|
p->vrows = vyres/fh;
|
|
|
|
|
if (yres > (fh * (vc->vc_rows + 1)))
|
|
|
|
|
p->vrows -= (yres - (fh * vc->vc_rows)) / fh;
|
|
|
|
|
if ((yres % fh) && (vyres % fh < yres % fh))
|
2005-04-17 05:20:36 +07:00
|
|
|
p->vrows--;
|
|
|
|
|
|
|
|
|
|
if (good_wrap || good_pan) {
|
|
|
|
|
if (reading_fast || fast_copyarea)
|
[PATCH] fbcon: Console Rotation - Prepare fbcon for console rotation
This patch series implements generic code to rotate the console at 90, 180,
and 270 degrees. The implementation is completely done in the framebuffer
console level, thus no changes to the framebuffer layer or to the drivers
are needed.
Console rotation is required by some Sharp-based devices where the natural
orientation of the display is not at 0 degrees. Also, users that have
displays that can pivot will benefit by having a console in portrait mode
if they so desire.
The choice to implement the code in the console layer rather than in the
framebuffer layer is due to the following reasons:
- it's fast
- it does not require driver changes
- it can coexist with devices that can rotate the display at the hardware level
- it complements graphics applications that can do display rotation
The changes to core fbcon are minimal-- recognition of the console
rotation angle so it can swap directions, origins and axes (xres vs yres,
xpanstep vs ypanstep, xoffset vs yoffset, etc) and storage of the rotation
angle per display. The bulk of the code that does the actual drawing to the
screen are placed in separate files. Each angle of rotation has separate
methods (bmove, clear, putcs, cursor, update_start which is derived from
update_var, and clear_margins). To mimimize processing time, the fontdata
are pre-rotated at each console switch (only if the font or the angle has
changed).
The option can be compiled out (CONFIG_FRAMEBUFFER_CONSOLE_ROTATION = n) if
rotation is not needed.
Choosing the rotation angle can be done in several ways:
1. boot option fbcon=rotate:n, where
n = 0 - normal
n = 1 - 90 degrees (clockwise)
n = 2 - 180 degrees (upside down)
n = 3 - 270 degrees (counterclockwise)
2. echo n > /sys/class/graphics/fb[num]/con_rotate
where n is the same as described above. It sets the angle of rotation
of the current console
3 echo n > /sys/class/graphics/fb[num]/con_rotate_all
where n is the same as described above. Globally sets the angle of
rotation.
GOTCHAS:
The option, especially at angles of 90 and 270 degrees, will exercise
the least used code of drivers. Namely, at these angles, panning is done
in the x-axis, so it can reveal bugs in the driver if xpanstep is set
incorrectly. A workaround is to set xpanstep = 0.
Secondly, at these angles, the framebuffer memory access can be
unaligned if (fontheight * bpp) % 32 ~= 0 which can reveal bugs in the drivers
imageblit, fillrect and copyarea functions. (I think cfbfillrect may have
this buglet). A workaround is to use a standard 8x16 font.
Speed:
The scrolling speed difference between 0 and 180 degrees is minimal,
somewhere areound 1-2%. At 90 or 270 degress, speed drops down to a vicinity
of 30-40%. This is understandable because the blit direction is across the
framebuffer "direction." Scrolling will be helped at these angles if xpanstep
is not equal to zero, use of 8x16 fonts, and setting xres_virtual >= xres * 2.
Note: The code is tested on little-endian only, so I don't know if it will
work in big-endian. Please let me know, it will take only less than a minute
of your time.
This patch prepares fbcon for console rotation and contains the following
changes:
- add rotate field in struct fbcon_ops to keep fbcon's current rotation
angle
- add con_rotate field in struct display to store per-display rotation angle
- create a private copy of the current var to fbcon. This will prevent
fbcon from directly manipulating info->var, especially the fields xoffset,
yoffset and vmode.
- add ability to swap pertinent axes (xres, yres; xpanstep, ypanstep; etc)
depending on the rotation angle
- change global update_var() (function that sets the screen start address)
as an fbcon method update_start. This is required because the axes, start
offset, and/or direction can be reversed depending on the rotation angle.
- add fbcon method rotate_font() which will rotate each character bitmap to
the correct angle of rotation.
- add fbcon boot option 'rotate' to select the angle of rotation at bootime.
Currently does nothing until all patches are applied.
Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-11-09 12:39:09 +07:00
|
|
|
p->scrollmode = good_wrap ?
|
|
|
|
|
SCROLL_WRAP_MOVE : SCROLL_PAN_MOVE;
|
2005-04-17 05:20:36 +07:00
|
|
|
else
|
|
|
|
|
p->scrollmode = good_wrap ? SCROLL_REDRAW :
|
|
|
|
|
SCROLL_PAN_REDRAW;
|
|
|
|
|
} else {
|
|
|
|
|
if (reading_fast || (fast_copyarea && !fast_imageblit))
|
|
|
|
|
p->scrollmode = SCROLL_MOVE;
|
|
|
|
|
else
|
|
|
|
|
p->scrollmode = SCROLL_REDRAW;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static int fbcon_resize(struct vc_data *vc, unsigned int width,
|
|
|
|
|
unsigned int height)
|
|
|
|
|
{
|
|
|
|
|
struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
|
[PATCH] fbcon: Console Rotation - Prepare fbcon for console rotation
This patch series implements generic code to rotate the console at 90, 180,
and 270 degrees. The implementation is completely done in the framebuffer
console level, thus no changes to the framebuffer layer or to the drivers
are needed.
Console rotation is required by some Sharp-based devices where the natural
orientation of the display is not at 0 degrees. Also, users that have
displays that can pivot will benefit by having a console in portrait mode
if they so desire.
The choice to implement the code in the console layer rather than in the
framebuffer layer is due to the following reasons:
- it's fast
- it does not require driver changes
- it can coexist with devices that can rotate the display at the hardware level
- it complements graphics applications that can do display rotation
The changes to core fbcon are minimal-- recognition of the console
rotation angle so it can swap directions, origins and axes (xres vs yres,
xpanstep vs ypanstep, xoffset vs yoffset, etc) and storage of the rotation
angle per display. The bulk of the code that does the actual drawing to the
screen are placed in separate files. Each angle of rotation has separate
methods (bmove, clear, putcs, cursor, update_start which is derived from
update_var, and clear_margins). To mimimize processing time, the fontdata
are pre-rotated at each console switch (only if the font or the angle has
changed).
The option can be compiled out (CONFIG_FRAMEBUFFER_CONSOLE_ROTATION = n) if
rotation is not needed.
Choosing the rotation angle can be done in several ways:
1. boot option fbcon=rotate:n, where
n = 0 - normal
n = 1 - 90 degrees (clockwise)
n = 2 - 180 degrees (upside down)
n = 3 - 270 degrees (counterclockwise)
2. echo n > /sys/class/graphics/fb[num]/con_rotate
where n is the same as described above. It sets the angle of rotation
of the current console
3 echo n > /sys/class/graphics/fb[num]/con_rotate_all
where n is the same as described above. Globally sets the angle of
rotation.
GOTCHAS:
The option, especially at angles of 90 and 270 degrees, will exercise
the least used code of drivers. Namely, at these angles, panning is done
in the x-axis, so it can reveal bugs in the driver if xpanstep is set
incorrectly. A workaround is to set xpanstep = 0.
Secondly, at these angles, the framebuffer memory access can be
unaligned if (fontheight * bpp) % 32 ~= 0 which can reveal bugs in the drivers
imageblit, fillrect and copyarea functions. (I think cfbfillrect may have
this buglet). A workaround is to use a standard 8x16 font.
Speed:
The scrolling speed difference between 0 and 180 degrees is minimal,
somewhere areound 1-2%. At 90 or 270 degress, speed drops down to a vicinity
of 30-40%. This is understandable because the blit direction is across the
framebuffer "direction." Scrolling will be helped at these angles if xpanstep
is not equal to zero, use of 8x16 fonts, and setting xres_virtual >= xres * 2.
Note: The code is tested on little-endian only, so I don't know if it will
work in big-endian. Please let me know, it will take only less than a minute
of your time.
This patch prepares fbcon for console rotation and contains the following
changes:
- add rotate field in struct fbcon_ops to keep fbcon's current rotation
angle
- add con_rotate field in struct display to store per-display rotation angle
- create a private copy of the current var to fbcon. This will prevent
fbcon from directly manipulating info->var, especially the fields xoffset,
yoffset and vmode.
- add ability to swap pertinent axes (xres, yres; xpanstep, ypanstep; etc)
depending on the rotation angle
- change global update_var() (function that sets the screen start address)
as an fbcon method update_start. This is required because the axes, start
offset, and/or direction can be reversed depending on the rotation angle.
- add fbcon method rotate_font() which will rotate each character bitmap to
the correct angle of rotation.
- add fbcon boot option 'rotate' to select the angle of rotation at bootime.
Currently does nothing until all patches are applied.
Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-11-09 12:39:09 +07:00
|
|
|
struct fbcon_ops *ops = info->fbcon_par;
|
2005-04-17 05:20:36 +07:00
|
|
|
struct display *p = &fb_display[vc->vc_num];
|
|
|
|
|
struct fb_var_screeninfo var = info->var;
|
[PATCH] fbcon: Console Rotation - Prepare fbcon for console rotation
This patch series implements generic code to rotate the console at 90, 180,
and 270 degrees. The implementation is completely done in the framebuffer
console level, thus no changes to the framebuffer layer or to the drivers
are needed.
Console rotation is required by some Sharp-based devices where the natural
orientation of the display is not at 0 degrees. Also, users that have
displays that can pivot will benefit by having a console in portrait mode
if they so desire.
The choice to implement the code in the console layer rather than in the
framebuffer layer is due to the following reasons:
- it's fast
- it does not require driver changes
- it can coexist with devices that can rotate the display at the hardware level
- it complements graphics applications that can do display rotation
The changes to core fbcon are minimal-- recognition of the console
rotation angle so it can swap directions, origins and axes (xres vs yres,
xpanstep vs ypanstep, xoffset vs yoffset, etc) and storage of the rotation
angle per display. The bulk of the code that does the actual drawing to the
screen are placed in separate files. Each angle of rotation has separate
methods (bmove, clear, putcs, cursor, update_start which is derived from
update_var, and clear_margins). To mimimize processing time, the fontdata
are pre-rotated at each console switch (only if the font or the angle has
changed).
The option can be compiled out (CONFIG_FRAMEBUFFER_CONSOLE_ROTATION = n) if
rotation is not needed.
Choosing the rotation angle can be done in several ways:
1. boot option fbcon=rotate:n, where
n = 0 - normal
n = 1 - 90 degrees (clockwise)
n = 2 - 180 degrees (upside down)
n = 3 - 270 degrees (counterclockwise)
2. echo n > /sys/class/graphics/fb[num]/con_rotate
where n is the same as described above. It sets the angle of rotation
of the current console
3 echo n > /sys/class/graphics/fb[num]/con_rotate_all
where n is the same as described above. Globally sets the angle of
rotation.
GOTCHAS:
The option, especially at angles of 90 and 270 degrees, will exercise
the least used code of drivers. Namely, at these angles, panning is done
in the x-axis, so it can reveal bugs in the driver if xpanstep is set
incorrectly. A workaround is to set xpanstep = 0.
Secondly, at these angles, the framebuffer memory access can be
unaligned if (fontheight * bpp) % 32 ~= 0 which can reveal bugs in the drivers
imageblit, fillrect and copyarea functions. (I think cfbfillrect may have
this buglet). A workaround is to use a standard 8x16 font.
Speed:
The scrolling speed difference between 0 and 180 degrees is minimal,
somewhere areound 1-2%. At 90 or 270 degress, speed drops down to a vicinity
of 30-40%. This is understandable because the blit direction is across the
framebuffer "direction." Scrolling will be helped at these angles if xpanstep
is not equal to zero, use of 8x16 fonts, and setting xres_virtual >= xres * 2.
Note: The code is tested on little-endian only, so I don't know if it will
work in big-endian. Please let me know, it will take only less than a minute
of your time.
This patch prepares fbcon for console rotation and contains the following
changes:
- add rotate field in struct fbcon_ops to keep fbcon's current rotation
angle
- add con_rotate field in struct display to store per-display rotation angle
- create a private copy of the current var to fbcon. This will prevent
fbcon from directly manipulating info->var, especially the fields xoffset,
yoffset and vmode.
- add ability to swap pertinent axes (xres, yres; xpanstep, ypanstep; etc)
depending on the rotation angle
- change global update_var() (function that sets the screen start address)
as an fbcon method update_start. This is required because the axes, start
offset, and/or direction can be reversed depending on the rotation angle.
- add fbcon method rotate_font() which will rotate each character bitmap to
the correct angle of rotation.
- add fbcon boot option 'rotate' to select the angle of rotation at bootime.
Currently does nothing until all patches are applied.
Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-11-09 12:39:09 +07:00
|
|
|
int x_diff, y_diff, virt_w, virt_h, virt_fw, virt_fh;
|
|
|
|
|
|
|
|
|
|
virt_w = FBCON_SWAP(ops->rotate, width, height);
|
|
|
|
|
virt_h = FBCON_SWAP(ops->rotate, height, width);
|
|
|
|
|
virt_fw = FBCON_SWAP(ops->rotate, vc->vc_font.width,
|
|
|
|
|
vc->vc_font.height);
|
|
|
|
|
virt_fh = FBCON_SWAP(ops->rotate, vc->vc_font.height,
|
|
|
|
|
vc->vc_font.width);
|
|
|
|
|
var.xres = virt_w * virt_fw;
|
|
|
|
|
var.yres = virt_h * virt_fh;
|
2005-04-17 05:20:36 +07:00
|
|
|
x_diff = info->var.xres - var.xres;
|
|
|
|
|
y_diff = info->var.yres - var.yres;
|
[PATCH] fbcon: Console Rotation - Prepare fbcon for console rotation
This patch series implements generic code to rotate the console at 90, 180,
and 270 degrees. The implementation is completely done in the framebuffer
console level, thus no changes to the framebuffer layer or to the drivers
are needed.
Console rotation is required by some Sharp-based devices where the natural
orientation of the display is not at 0 degrees. Also, users that have
displays that can pivot will benefit by having a console in portrait mode
if they so desire.
The choice to implement the code in the console layer rather than in the
framebuffer layer is due to the following reasons:
- it's fast
- it does not require driver changes
- it can coexist with devices that can rotate the display at the hardware level
- it complements graphics applications that can do display rotation
The changes to core fbcon are minimal-- recognition of the console
rotation angle so it can swap directions, origins and axes (xres vs yres,
xpanstep vs ypanstep, xoffset vs yoffset, etc) and storage of the rotation
angle per display. The bulk of the code that does the actual drawing to the
screen are placed in separate files. Each angle of rotation has separate
methods (bmove, clear, putcs, cursor, update_start which is derived from
update_var, and clear_margins). To mimimize processing time, the fontdata
are pre-rotated at each console switch (only if the font or the angle has
changed).
The option can be compiled out (CONFIG_FRAMEBUFFER_CONSOLE_ROTATION = n) if
rotation is not needed.
Choosing the rotation angle can be done in several ways:
1. boot option fbcon=rotate:n, where
n = 0 - normal
n = 1 - 90 degrees (clockwise)
n = 2 - 180 degrees (upside down)
n = 3 - 270 degrees (counterclockwise)
2. echo n > /sys/class/graphics/fb[num]/con_rotate
where n is the same as described above. It sets the angle of rotation
of the current console
3 echo n > /sys/class/graphics/fb[num]/con_rotate_all
where n is the same as described above. Globally sets the angle of
rotation.
GOTCHAS:
The option, especially at angles of 90 and 270 degrees, will exercise
the least used code of drivers. Namely, at these angles, panning is done
in the x-axis, so it can reveal bugs in the driver if xpanstep is set
incorrectly. A workaround is to set xpanstep = 0.
Secondly, at these angles, the framebuffer memory access can be
unaligned if (fontheight * bpp) % 32 ~= 0 which can reveal bugs in the drivers
imageblit, fillrect and copyarea functions. (I think cfbfillrect may have
this buglet). A workaround is to use a standard 8x16 font.
Speed:
The scrolling speed difference between 0 and 180 degrees is minimal,
somewhere areound 1-2%. At 90 or 270 degress, speed drops down to a vicinity
of 30-40%. This is understandable because the blit direction is across the
framebuffer "direction." Scrolling will be helped at these angles if xpanstep
is not equal to zero, use of 8x16 fonts, and setting xres_virtual >= xres * 2.
Note: The code is tested on little-endian only, so I don't know if it will
work in big-endian. Please let me know, it will take only less than a minute
of your time.
This patch prepares fbcon for console rotation and contains the following
changes:
- add rotate field in struct fbcon_ops to keep fbcon's current rotation
angle
- add con_rotate field in struct display to store per-display rotation angle
- create a private copy of the current var to fbcon. This will prevent
fbcon from directly manipulating info->var, especially the fields xoffset,
yoffset and vmode.
- add ability to swap pertinent axes (xres, yres; xpanstep, ypanstep; etc)
depending on the rotation angle
- change global update_var() (function that sets the screen start address)
as an fbcon method update_start. This is required because the axes, start
offset, and/or direction can be reversed depending on the rotation angle.
- add fbcon method rotate_font() which will rotate each character bitmap to
the correct angle of rotation.
- add fbcon boot option 'rotate' to select the angle of rotation at bootime.
Currently does nothing until all patches are applied.
Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-11-09 12:39:09 +07:00
|
|
|
if (x_diff < 0 || x_diff > virt_fw ||
|
|
|
|
|
y_diff < 0 || y_diff > virt_fh) {
|
2005-04-17 05:20:36 +07:00
|
|
|
struct fb_videomode *mode;
|
|
|
|
|
|
|
|
|
|
DPRINTK("attempting resize %ix%i\n", var.xres, var.yres);
|
|
|
|
|
mode = fb_find_best_mode(&var, &info->modelist);
|
|
|
|
|
if (mode == NULL)
|
|
|
|
|
return -EINVAL;
|
2005-11-07 16:00:37 +07:00
|
|
|
display_to_var(&var, p);
|
2005-04-17 05:20:36 +07:00
|
|
|
fb_videomode_to_var(&var, mode);
|
2005-11-07 16:00:37 +07:00
|
|
|
|
[PATCH] fbcon: Console Rotation - Prepare fbcon for console rotation
This patch series implements generic code to rotate the console at 90, 180,
and 270 degrees. The implementation is completely done in the framebuffer
console level, thus no changes to the framebuffer layer or to the drivers
are needed.
Console rotation is required by some Sharp-based devices where the natural
orientation of the display is not at 0 degrees. Also, users that have
displays that can pivot will benefit by having a console in portrait mode
if they so desire.
The choice to implement the code in the console layer rather than in the
framebuffer layer is due to the following reasons:
- it's fast
- it does not require driver changes
- it can coexist with devices that can rotate the display at the hardware level
- it complements graphics applications that can do display rotation
The changes to core fbcon are minimal-- recognition of the console
rotation angle so it can swap directions, origins and axes (xres vs yres,
xpanstep vs ypanstep, xoffset vs yoffset, etc) and storage of the rotation
angle per display. The bulk of the code that does the actual drawing to the
screen are placed in separate files. Each angle of rotation has separate
methods (bmove, clear, putcs, cursor, update_start which is derived from
update_var, and clear_margins). To mimimize processing time, the fontdata
are pre-rotated at each console switch (only if the font or the angle has
changed).
The option can be compiled out (CONFIG_FRAMEBUFFER_CONSOLE_ROTATION = n) if
rotation is not needed.
Choosing the rotation angle can be done in several ways:
1. boot option fbcon=rotate:n, where
n = 0 - normal
n = 1 - 90 degrees (clockwise)
n = 2 - 180 degrees (upside down)
n = 3 - 270 degrees (counterclockwise)
2. echo n > /sys/class/graphics/fb[num]/con_rotate
where n is the same as described above. It sets the angle of rotation
of the current console
3 echo n > /sys/class/graphics/fb[num]/con_rotate_all
where n is the same as described above. Globally sets the angle of
rotation.
GOTCHAS:
The option, especially at angles of 90 and 270 degrees, will exercise
the least used code of drivers. Namely, at these angles, panning is done
in the x-axis, so it can reveal bugs in the driver if xpanstep is set
incorrectly. A workaround is to set xpanstep = 0.
Secondly, at these angles, the framebuffer memory access can be
unaligned if (fontheight * bpp) % 32 ~= 0 which can reveal bugs in the drivers
imageblit, fillrect and copyarea functions. (I think cfbfillrect may have
this buglet). A workaround is to use a standard 8x16 font.
Speed:
The scrolling speed difference between 0 and 180 degrees is minimal,
somewhere areound 1-2%. At 90 or 270 degress, speed drops down to a vicinity
of 30-40%. This is understandable because the blit direction is across the
framebuffer "direction." Scrolling will be helped at these angles if xpanstep
is not equal to zero, use of 8x16 fonts, and setting xres_virtual >= xres * 2.
Note: The code is tested on little-endian only, so I don't know if it will
work in big-endian. Please let me know, it will take only less than a minute
of your time.
This patch prepares fbcon for console rotation and contains the following
changes:
- add rotate field in struct fbcon_ops to keep fbcon's current rotation
angle
- add con_rotate field in struct display to store per-display rotation angle
- create a private copy of the current var to fbcon. This will prevent
fbcon from directly manipulating info->var, especially the fields xoffset,
yoffset and vmode.
- add ability to swap pertinent axes (xres, yres; xpanstep, ypanstep; etc)
depending on the rotation angle
- change global update_var() (function that sets the screen start address)
as an fbcon method update_start. This is required because the axes, start
offset, and/or direction can be reversed depending on the rotation angle.
- add fbcon method rotate_font() which will rotate each character bitmap to
the correct angle of rotation.
- add fbcon boot option 'rotate' to select the angle of rotation at bootime.
Currently does nothing until all patches are applied.
Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-11-09 12:39:09 +07:00
|
|
|
if (virt_w > var.xres/virt_fw || virt_h > var.yres/virt_fh)
|
2005-04-17 05:20:36 +07:00
|
|
|
return -EINVAL;
|
|
|
|
|
|
|
|
|
|
DPRINTK("resize now %ix%i\n", var.xres, var.yres);
|
|
|
|
|
if (CON_IS_VISIBLE(vc)) {
|
|
|
|
|
var.activate = FB_ACTIVATE_NOW |
|
|
|
|
|
FB_ACTIVATE_FORCE;
|
|
|
|
|
fb_set_var(info, &var);
|
|
|
|
|
}
|
|
|
|
|
var_to_display(p, &info->var, info);
|
[PATCH] fbcon: Console Rotation - Prepare fbcon for console rotation
This patch series implements generic code to rotate the console at 90, 180,
and 270 degrees. The implementation is completely done in the framebuffer
console level, thus no changes to the framebuffer layer or to the drivers
are needed.
Console rotation is required by some Sharp-based devices where the natural
orientation of the display is not at 0 degrees. Also, users that have
displays that can pivot will benefit by having a console in portrait mode
if they so desire.
The choice to implement the code in the console layer rather than in the
framebuffer layer is due to the following reasons:
- it's fast
- it does not require driver changes
- it can coexist with devices that can rotate the display at the hardware level
- it complements graphics applications that can do display rotation
The changes to core fbcon are minimal-- recognition of the console
rotation angle so it can swap directions, origins and axes (xres vs yres,
xpanstep vs ypanstep, xoffset vs yoffset, etc) and storage of the rotation
angle per display. The bulk of the code that does the actual drawing to the
screen are placed in separate files. Each angle of rotation has separate
methods (bmove, clear, putcs, cursor, update_start which is derived from
update_var, and clear_margins). To mimimize processing time, the fontdata
are pre-rotated at each console switch (only if the font or the angle has
changed).
The option can be compiled out (CONFIG_FRAMEBUFFER_CONSOLE_ROTATION = n) if
rotation is not needed.
Choosing the rotation angle can be done in several ways:
1. boot option fbcon=rotate:n, where
n = 0 - normal
n = 1 - 90 degrees (clockwise)
n = 2 - 180 degrees (upside down)
n = 3 - 270 degrees (counterclockwise)
2. echo n > /sys/class/graphics/fb[num]/con_rotate
where n is the same as described above. It sets the angle of rotation
of the current console
3 echo n > /sys/class/graphics/fb[num]/con_rotate_all
where n is the same as described above. Globally sets the angle of
rotation.
GOTCHAS:
The option, especially at angles of 90 and 270 degrees, will exercise
the least used code of drivers. Namely, at these angles, panning is done
in the x-axis, so it can reveal bugs in the driver if xpanstep is set
incorrectly. A workaround is to set xpanstep = 0.
Secondly, at these angles, the framebuffer memory access can be
unaligned if (fontheight * bpp) % 32 ~= 0 which can reveal bugs in the drivers
imageblit, fillrect and copyarea functions. (I think cfbfillrect may have
this buglet). A workaround is to use a standard 8x16 font.
Speed:
The scrolling speed difference between 0 and 180 degrees is minimal,
somewhere areound 1-2%. At 90 or 270 degress, speed drops down to a vicinity
of 30-40%. This is understandable because the blit direction is across the
framebuffer "direction." Scrolling will be helped at these angles if xpanstep
is not equal to zero, use of 8x16 fonts, and setting xres_virtual >= xres * 2.
Note: The code is tested on little-endian only, so I don't know if it will
work in big-endian. Please let me know, it will take only less than a minute
of your time.
This patch prepares fbcon for console rotation and contains the following
changes:
- add rotate field in struct fbcon_ops to keep fbcon's current rotation
angle
- add con_rotate field in struct display to store per-display rotation angle
- create a private copy of the current var to fbcon. This will prevent
fbcon from directly manipulating info->var, especially the fields xoffset,
yoffset and vmode.
- add ability to swap pertinent axes (xres, yres; xpanstep, ypanstep; etc)
depending on the rotation angle
- change global update_var() (function that sets the screen start address)
as an fbcon method update_start. This is required because the axes, start
offset, and/or direction can be reversed depending on the rotation angle.
- add fbcon method rotate_font() which will rotate each character bitmap to
the correct angle of rotation.
- add fbcon boot option 'rotate' to select the angle of rotation at bootime.
Currently does nothing until all patches are applied.
Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-11-09 12:39:09 +07:00
|
|
|
ops->var = info->var;
|
2005-04-17 05:20:36 +07:00
|
|
|
}
|
|
|
|
|
updatescrollmode(p, info, vc);
|
|
|
|
|
return 0;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static int fbcon_switch(struct vc_data *vc)
|
|
|
|
|
{
|
2005-09-10 03:10:00 +07:00
|
|
|
struct fb_info *info, *old_info = NULL;
|
[PATCH] fbcon: Console Rotation - Prepare fbcon for console rotation
This patch series implements generic code to rotate the console at 90, 180,
and 270 degrees. The implementation is completely done in the framebuffer
console level, thus no changes to the framebuffer layer or to the drivers
are needed.
Console rotation is required by some Sharp-based devices where the natural
orientation of the display is not at 0 degrees. Also, users that have
displays that can pivot will benefit by having a console in portrait mode
if they so desire.
The choice to implement the code in the console layer rather than in the
framebuffer layer is due to the following reasons:
- it's fast
- it does not require driver changes
- it can coexist with devices that can rotate the display at the hardware level
- it complements graphics applications that can do display rotation
The changes to core fbcon are minimal-- recognition of the console
rotation angle so it can swap directions, origins and axes (xres vs yres,
xpanstep vs ypanstep, xoffset vs yoffset, etc) and storage of the rotation
angle per display. The bulk of the code that does the actual drawing to the
screen are placed in separate files. Each angle of rotation has separate
methods (bmove, clear, putcs, cursor, update_start which is derived from
update_var, and clear_margins). To mimimize processing time, the fontdata
are pre-rotated at each console switch (only if the font or the angle has
changed).
The option can be compiled out (CONFIG_FRAMEBUFFER_CONSOLE_ROTATION = n) if
rotation is not needed.
Choosing the rotation angle can be done in several ways:
1. boot option fbcon=rotate:n, where
n = 0 - normal
n = 1 - 90 degrees (clockwise)
n = 2 - 180 degrees (upside down)
n = 3 - 270 degrees (counterclockwise)
2. echo n > /sys/class/graphics/fb[num]/con_rotate
where n is the same as described above. It sets the angle of rotation
of the current console
3 echo n > /sys/class/graphics/fb[num]/con_rotate_all
where n is the same as described above. Globally sets the angle of
rotation.
GOTCHAS:
The option, especially at angles of 90 and 270 degrees, will exercise
the least used code of drivers. Namely, at these angles, panning is done
in the x-axis, so it can reveal bugs in the driver if xpanstep is set
incorrectly. A workaround is to set xpanstep = 0.
Secondly, at these angles, the framebuffer memory access can be
unaligned if (fontheight * bpp) % 32 ~= 0 which can reveal bugs in the drivers
imageblit, fillrect and copyarea functions. (I think cfbfillrect may have
this buglet). A workaround is to use a standard 8x16 font.
Speed:
The scrolling speed difference between 0 and 180 degrees is minimal,
somewhere areound 1-2%. At 90 or 270 degress, speed drops down to a vicinity
of 30-40%. This is understandable because the blit direction is across the
framebuffer "direction." Scrolling will be helped at these angles if xpanstep
is not equal to zero, use of 8x16 fonts, and setting xres_virtual >= xres * 2.
Note: The code is tested on little-endian only, so I don't know if it will
work in big-endian. Please let me know, it will take only less than a minute
of your time.
This patch prepares fbcon for console rotation and contains the following
changes:
- add rotate field in struct fbcon_ops to keep fbcon's current rotation
angle
- add con_rotate field in struct display to store per-display rotation angle
- create a private copy of the current var to fbcon. This will prevent
fbcon from directly manipulating info->var, especially the fields xoffset,
yoffset and vmode.
- add ability to swap pertinent axes (xres, yres; xpanstep, ypanstep; etc)
depending on the rotation angle
- change global update_var() (function that sets the screen start address)
as an fbcon method update_start. This is required because the axes, start
offset, and/or direction can be reversed depending on the rotation angle.
- add fbcon method rotate_font() which will rotate each character bitmap to
the correct angle of rotation.
- add fbcon boot option 'rotate' to select the angle of rotation at bootime.
Currently does nothing until all patches are applied.
Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-11-09 12:39:09 +07:00
|
|
|
struct fbcon_ops *ops;
|
2005-04-17 05:20:36 +07:00
|
|
|
struct display *p = &fb_display[vc->vc_num];
|
|
|
|
|
struct fb_var_screeninfo var;
|
|
|
|
|
int i, prev_console;
|
|
|
|
|
|
|
|
|
|
info = registered_fb[con2fb_map[vc->vc_num]];
|
[PATCH] fbcon: Console Rotation - Prepare fbcon for console rotation
This patch series implements generic code to rotate the console at 90, 180,
and 270 degrees. The implementation is completely done in the framebuffer
console level, thus no changes to the framebuffer layer or to the drivers
are needed.
Console rotation is required by some Sharp-based devices where the natural
orientation of the display is not at 0 degrees. Also, users that have
displays that can pivot will benefit by having a console in portrait mode
if they so desire.
The choice to implement the code in the console layer rather than in the
framebuffer layer is due to the following reasons:
- it's fast
- it does not require driver changes
- it can coexist with devices that can rotate the display at the hardware level
- it complements graphics applications that can do display rotation
The changes to core fbcon are minimal-- recognition of the console
rotation angle so it can swap directions, origins and axes (xres vs yres,
xpanstep vs ypanstep, xoffset vs yoffset, etc) and storage of the rotation
angle per display. The bulk of the code that does the actual drawing to the
screen are placed in separate files. Each angle of rotation has separate
methods (bmove, clear, putcs, cursor, update_start which is derived from
update_var, and clear_margins). To mimimize processing time, the fontdata
are pre-rotated at each console switch (only if the font or the angle has
changed).
The option can be compiled out (CONFIG_FRAMEBUFFER_CONSOLE_ROTATION = n) if
rotation is not needed.
Choosing the rotation angle can be done in several ways:
1. boot option fbcon=rotate:n, where
n = 0 - normal
n = 1 - 90 degrees (clockwise)
n = 2 - 180 degrees (upside down)
n = 3 - 270 degrees (counterclockwise)
2. echo n > /sys/class/graphics/fb[num]/con_rotate
where n is the same as described above. It sets the angle of rotation
of the current console
3 echo n > /sys/class/graphics/fb[num]/con_rotate_all
where n is the same as described above. Globally sets the angle of
rotation.
GOTCHAS:
The option, especially at angles of 90 and 270 degrees, will exercise
the least used code of drivers. Namely, at these angles, panning is done
in the x-axis, so it can reveal bugs in the driver if xpanstep is set
incorrectly. A workaround is to set xpanstep = 0.
Secondly, at these angles, the framebuffer memory access can be
unaligned if (fontheight * bpp) % 32 ~= 0 which can reveal bugs in the drivers
imageblit, fillrect and copyarea functions. (I think cfbfillrect may have
this buglet). A workaround is to use a standard 8x16 font.
Speed:
The scrolling speed difference between 0 and 180 degrees is minimal,
somewhere areound 1-2%. At 90 or 270 degress, speed drops down to a vicinity
of 30-40%. This is understandable because the blit direction is across the
framebuffer "direction." Scrolling will be helped at these angles if xpanstep
is not equal to zero, use of 8x16 fonts, and setting xres_virtual >= xres * 2.
Note: The code is tested on little-endian only, so I don't know if it will
work in big-endian. Please let me know, it will take only less than a minute
of your time.
This patch prepares fbcon for console rotation and contains the following
changes:
- add rotate field in struct fbcon_ops to keep fbcon's current rotation
angle
- add con_rotate field in struct display to store per-display rotation angle
- create a private copy of the current var to fbcon. This will prevent
fbcon from directly manipulating info->var, especially the fields xoffset,
yoffset and vmode.
- add ability to swap pertinent axes (xres, yres; xpanstep, ypanstep; etc)
depending on the rotation angle
- change global update_var() (function that sets the screen start address)
as an fbcon method update_start. This is required because the axes, start
offset, and/or direction can be reversed depending on the rotation angle.
- add fbcon method rotate_font() which will rotate each character bitmap to
the correct angle of rotation.
- add fbcon boot option 'rotate' to select the angle of rotation at bootime.
Currently does nothing until all patches are applied.
Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-11-09 12:39:09 +07:00
|
|
|
ops = info->fbcon_par;
|
2005-04-17 05:20:36 +07:00
|
|
|
|
|
|
|
|
if (softback_top) {
|
|
|
|
|
if (softback_lines)
|
|
|
|
|
fbcon_set_origin(vc);
|
|
|
|
|
softback_top = softback_curr = softback_in = softback_buf;
|
|
|
|
|
softback_lines = 0;
|
2005-11-07 16:00:36 +07:00
|
|
|
fbcon_update_softback(vc);
|
2005-04-17 05:20:36 +07:00
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if (logo_shown >= 0) {
|
|
|
|
|
struct vc_data *conp2 = vc_cons[logo_shown].d;
|
|
|
|
|
|
|
|
|
|
if (conp2->vc_top == logo_lines
|
|
|
|
|
&& conp2->vc_bottom == conp2->vc_rows)
|
|
|
|
|
conp2->vc_top = 0;
|
|
|
|
|
logo_shown = FBCON_LOGO_CANSHOW;
|
|
|
|
|
}
|
|
|
|
|
|
[PATCH] fbcon: Console Rotation - Prepare fbcon for console rotation
This patch series implements generic code to rotate the console at 90, 180,
and 270 degrees. The implementation is completely done in the framebuffer
console level, thus no changes to the framebuffer layer or to the drivers
are needed.
Console rotation is required by some Sharp-based devices where the natural
orientation of the display is not at 0 degrees. Also, users that have
displays that can pivot will benefit by having a console in portrait mode
if they so desire.
The choice to implement the code in the console layer rather than in the
framebuffer layer is due to the following reasons:
- it's fast
- it does not require driver changes
- it can coexist with devices that can rotate the display at the hardware level
- it complements graphics applications that can do display rotation
The changes to core fbcon are minimal-- recognition of the console
rotation angle so it can swap directions, origins and axes (xres vs yres,
xpanstep vs ypanstep, xoffset vs yoffset, etc) and storage of the rotation
angle per display. The bulk of the code that does the actual drawing to the
screen are placed in separate files. Each angle of rotation has separate
methods (bmove, clear, putcs, cursor, update_start which is derived from
update_var, and clear_margins). To mimimize processing time, the fontdata
are pre-rotated at each console switch (only if the font or the angle has
changed).
The option can be compiled out (CONFIG_FRAMEBUFFER_CONSOLE_ROTATION = n) if
rotation is not needed.
Choosing the rotation angle can be done in several ways:
1. boot option fbcon=rotate:n, where
n = 0 - normal
n = 1 - 90 degrees (clockwise)
n = 2 - 180 degrees (upside down)
n = 3 - 270 degrees (counterclockwise)
2. echo n > /sys/class/graphics/fb[num]/con_rotate
where n is the same as described above. It sets the angle of rotation
of the current console
3 echo n > /sys/class/graphics/fb[num]/con_rotate_all
where n is the same as described above. Globally sets the angle of
rotation.
GOTCHAS:
The option, especially at angles of 90 and 270 degrees, will exercise
the least used code of drivers. Namely, at these angles, panning is done
in the x-axis, so it can reveal bugs in the driver if xpanstep is set
incorrectly. A workaround is to set xpanstep = 0.
Secondly, at these angles, the framebuffer memory access can be
unaligned if (fontheight * bpp) % 32 ~= 0 which can reveal bugs in the drivers
imageblit, fillrect and copyarea functions. (I think cfbfillrect may have
this buglet). A workaround is to use a standard 8x16 font.
Speed:
The scrolling speed difference between 0 and 180 degrees is minimal,
somewhere areound 1-2%. At 90 or 270 degress, speed drops down to a vicinity
of 30-40%. This is understandable because the blit direction is across the
framebuffer "direction." Scrolling will be helped at these angles if xpanstep
is not equal to zero, use of 8x16 fonts, and setting xres_virtual >= xres * 2.
Note: The code is tested on little-endian only, so I don't know if it will
work in big-endian. Please let me know, it will take only less than a minute
of your time.
This patch prepares fbcon for console rotation and contains the following
changes:
- add rotate field in struct fbcon_ops to keep fbcon's current rotation
angle
- add con_rotate field in struct display to store per-display rotation angle
- create a private copy of the current var to fbcon. This will prevent
fbcon from directly manipulating info->var, especially the fields xoffset,
yoffset and vmode.
- add ability to swap pertinent axes (xres, yres; xpanstep, ypanstep; etc)
depending on the rotation angle
- change global update_var() (function that sets the screen start address)
as an fbcon method update_start. This is required because the axes, start
offset, and/or direction can be reversed depending on the rotation angle.
- add fbcon method rotate_font() which will rotate each character bitmap to
the correct angle of rotation.
- add fbcon boot option 'rotate' to select the angle of rotation at bootime.
Currently does nothing until all patches are applied.
Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-11-09 12:39:09 +07:00
|
|
|
prev_console = ops->currcon;
|
2005-09-10 03:10:00 +07:00
|
|
|
if (prev_console != -1)
|
|
|
|
|
old_info = registered_fb[con2fb_map[prev_console]];
|
2005-04-17 05:20:36 +07:00
|
|
|
/*
|
|
|
|
|
* FIXME: If we have multiple fbdev's loaded, we need to
|
|
|
|
|
* update all info->currcon. Perhaps, we can place this
|
|
|
|
|
* in a centralized structure, but this might break some
|
|
|
|
|
* drivers.
|
|
|
|
|
*
|
|
|
|
|
* info->currcon = vc->vc_num;
|
|
|
|
|
*/
|
|
|
|
|
for (i = 0; i < FB_MAX; i++) {
|
|
|
|
|
if (registered_fb[i] != NULL && registered_fb[i]->fbcon_par) {
|
[PATCH] fbcon: Console Rotation - Prepare fbcon for console rotation
This patch series implements generic code to rotate the console at 90, 180,
and 270 degrees. The implementation is completely done in the framebuffer
console level, thus no changes to the framebuffer layer or to the drivers
are needed.
Console rotation is required by some Sharp-based devices where the natural
orientation of the display is not at 0 degrees. Also, users that have
displays that can pivot will benefit by having a console in portrait mode
if they so desire.
The choice to implement the code in the console layer rather than in the
framebuffer layer is due to the following reasons:
- it's fast
- it does not require driver changes
- it can coexist with devices that can rotate the display at the hardware level
- it complements graphics applications that can do display rotation
The changes to core fbcon are minimal-- recognition of the console
rotation angle so it can swap directions, origins and axes (xres vs yres,
xpanstep vs ypanstep, xoffset vs yoffset, etc) and storage of the rotation
angle per display. The bulk of the code that does the actual drawing to the
screen are placed in separate files. Each angle of rotation has separate
methods (bmove, clear, putcs, cursor, update_start which is derived from
update_var, and clear_margins). To mimimize processing time, the fontdata
are pre-rotated at each console switch (only if the font or the angle has
changed).
The option can be compiled out (CONFIG_FRAMEBUFFER_CONSOLE_ROTATION = n) if
rotation is not needed.
Choosing the rotation angle can be done in several ways:
1. boot option fbcon=rotate:n, where
n = 0 - normal
n = 1 - 90 degrees (clockwise)
n = 2 - 180 degrees (upside down)
n = 3 - 270 degrees (counterclockwise)
2. echo n > /sys/class/graphics/fb[num]/con_rotate
where n is the same as described above. It sets the angle of rotation
of the current console
3 echo n > /sys/class/graphics/fb[num]/con_rotate_all
where n is the same as described above. Globally sets the angle of
rotation.
GOTCHAS:
The option, especially at angles of 90 and 270 degrees, will exercise
the least used code of drivers. Namely, at these angles, panning is done
in the x-axis, so it can reveal bugs in the driver if xpanstep is set
incorrectly. A workaround is to set xpanstep = 0.
Secondly, at these angles, the framebuffer memory access can be
unaligned if (fontheight * bpp) % 32 ~= 0 which can reveal bugs in the drivers
imageblit, fillrect and copyarea functions. (I think cfbfillrect may have
this buglet). A workaround is to use a standard 8x16 font.
Speed:
The scrolling speed difference between 0 and 180 degrees is minimal,
somewhere areound 1-2%. At 90 or 270 degress, speed drops down to a vicinity
of 30-40%. This is understandable because the blit direction is across the
framebuffer "direction." Scrolling will be helped at these angles if xpanstep
is not equal to zero, use of 8x16 fonts, and setting xres_virtual >= xres * 2.
Note: The code is tested on little-endian only, so I don't know if it will
work in big-endian. Please let me know, it will take only less than a minute
of your time.
This patch prepares fbcon for console rotation and contains the following
changes:
- add rotate field in struct fbcon_ops to keep fbcon's current rotation
angle
- add con_rotate field in struct display to store per-display rotation angle
- create a private copy of the current var to fbcon. This will prevent
fbcon from directly manipulating info->var, especially the fields xoffset,
yoffset and vmode.
- add ability to swap pertinent axes (xres, yres; xpanstep, ypanstep; etc)
depending on the rotation angle
- change global update_var() (function that sets the screen start address)
as an fbcon method update_start. This is required because the axes, start
offset, and/or direction can be reversed depending on the rotation angle.
- add fbcon method rotate_font() which will rotate each character bitmap to
the correct angle of rotation.
- add fbcon boot option 'rotate' to select the angle of rotation at bootime.
Currently does nothing until all patches are applied.
Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-11-09 12:39:09 +07:00
|
|
|
struct fbcon_ops *o = registered_fb[i]->fbcon_par;
|
2005-04-17 05:20:36 +07:00
|
|
|
|
[PATCH] fbcon: Console Rotation - Prepare fbcon for console rotation
This patch series implements generic code to rotate the console at 90, 180,
and 270 degrees. The implementation is completely done in the framebuffer
console level, thus no changes to the framebuffer layer or to the drivers
are needed.
Console rotation is required by some Sharp-based devices where the natural
orientation of the display is not at 0 degrees. Also, users that have
displays that can pivot will benefit by having a console in portrait mode
if they so desire.
The choice to implement the code in the console layer rather than in the
framebuffer layer is due to the following reasons:
- it's fast
- it does not require driver changes
- it can coexist with devices that can rotate the display at the hardware level
- it complements graphics applications that can do display rotation
The changes to core fbcon are minimal-- recognition of the console
rotation angle so it can swap directions, origins and axes (xres vs yres,
xpanstep vs ypanstep, xoffset vs yoffset, etc) and storage of the rotation
angle per display. The bulk of the code that does the actual drawing to the
screen are placed in separate files. Each angle of rotation has separate
methods (bmove, clear, putcs, cursor, update_start which is derived from
update_var, and clear_margins). To mimimize processing time, the fontdata
are pre-rotated at each console switch (only if the font or the angle has
changed).
The option can be compiled out (CONFIG_FRAMEBUFFER_CONSOLE_ROTATION = n) if
rotation is not needed.
Choosing the rotation angle can be done in several ways:
1. boot option fbcon=rotate:n, where
n = 0 - normal
n = 1 - 90 degrees (clockwise)
n = 2 - 180 degrees (upside down)
n = 3 - 270 degrees (counterclockwise)
2. echo n > /sys/class/graphics/fb[num]/con_rotate
where n is the same as described above. It sets the angle of rotation
of the current console
3 echo n > /sys/class/graphics/fb[num]/con_rotate_all
where n is the same as described above. Globally sets the angle of
rotation.
GOTCHAS:
The option, especially at angles of 90 and 270 degrees, will exercise
the least used code of drivers. Namely, at these angles, panning is done
in the x-axis, so it can reveal bugs in the driver if xpanstep is set
incorrectly. A workaround is to set xpanstep = 0.
Secondly, at these angles, the framebuffer memory access can be
unaligned if (fontheight * bpp) % 32 ~= 0 which can reveal bugs in the drivers
imageblit, fillrect and copyarea functions. (I think cfbfillrect may have
this buglet). A workaround is to use a standard 8x16 font.
Speed:
The scrolling speed difference between 0 and 180 degrees is minimal,
somewhere areound 1-2%. At 90 or 270 degress, speed drops down to a vicinity
of 30-40%. This is understandable because the blit direction is across the
framebuffer "direction." Scrolling will be helped at these angles if xpanstep
is not equal to zero, use of 8x16 fonts, and setting xres_virtual >= xres * 2.
Note: The code is tested on little-endian only, so I don't know if it will
work in big-endian. Please let me know, it will take only less than a minute
of your time.
This patch prepares fbcon for console rotation and contains the following
changes:
- add rotate field in struct fbcon_ops to keep fbcon's current rotation
angle
- add con_rotate field in struct display to store per-display rotation angle
- create a private copy of the current var to fbcon. This will prevent
fbcon from directly manipulating info->var, especially the fields xoffset,
yoffset and vmode.
- add ability to swap pertinent axes (xres, yres; xpanstep, ypanstep; etc)
depending on the rotation angle
- change global update_var() (function that sets the screen start address)
as an fbcon method update_start. This is required because the axes, start
offset, and/or direction can be reversed depending on the rotation angle.
- add fbcon method rotate_font() which will rotate each character bitmap to
the correct angle of rotation.
- add fbcon boot option 'rotate' to select the angle of rotation at bootime.
Currently does nothing until all patches are applied.
Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-11-09 12:39:09 +07:00
|
|
|
o->currcon = vc->vc_num;
|
2005-04-17 05:20:36 +07:00
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
memset(&var, 0, sizeof(struct fb_var_screeninfo));
|
|
|
|
|
display_to_var(&var, p);
|
|
|
|
|
var.activate = FB_ACTIVATE_NOW;
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* make sure we don't unnecessarily trip the memcmp()
|
|
|
|
|
* in fb_set_var()
|
|
|
|
|
*/
|
|
|
|
|
info->var.activate = var.activate;
|
[PATCH] fbcon: Console Rotation - Prepare fbcon for console rotation
This patch series implements generic code to rotate the console at 90, 180,
and 270 degrees. The implementation is completely done in the framebuffer
console level, thus no changes to the framebuffer layer or to the drivers
are needed.
Console rotation is required by some Sharp-based devices where the natural
orientation of the display is not at 0 degrees. Also, users that have
displays that can pivot will benefit by having a console in portrait mode
if they so desire.
The choice to implement the code in the console layer rather than in the
framebuffer layer is due to the following reasons:
- it's fast
- it does not require driver changes
- it can coexist with devices that can rotate the display at the hardware level
- it complements graphics applications that can do display rotation
The changes to core fbcon are minimal-- recognition of the console
rotation angle so it can swap directions, origins and axes (xres vs yres,
xpanstep vs ypanstep, xoffset vs yoffset, etc) and storage of the rotation
angle per display. The bulk of the code that does the actual drawing to the
screen are placed in separate files. Each angle of rotation has separate
methods (bmove, clear, putcs, cursor, update_start which is derived from
update_var, and clear_margins). To mimimize processing time, the fontdata
are pre-rotated at each console switch (only if the font or the angle has
changed).
The option can be compiled out (CONFIG_FRAMEBUFFER_CONSOLE_ROTATION = n) if
rotation is not needed.
Choosing the rotation angle can be done in several ways:
1. boot option fbcon=rotate:n, where
n = 0 - normal
n = 1 - 90 degrees (clockwise)
n = 2 - 180 degrees (upside down)
n = 3 - 270 degrees (counterclockwise)
2. echo n > /sys/class/graphics/fb[num]/con_rotate
where n is the same as described above. It sets the angle of rotation
of the current console
3 echo n > /sys/class/graphics/fb[num]/con_rotate_all
where n is the same as described above. Globally sets the angle of
rotation.
GOTCHAS:
The option, especially at angles of 90 and 270 degrees, will exercise
the least used code of drivers. Namely, at these angles, panning is done
in the x-axis, so it can reveal bugs in the driver if xpanstep is set
incorrectly. A workaround is to set xpanstep = 0.
Secondly, at these angles, the framebuffer memory access can be
unaligned if (fontheight * bpp) % 32 ~= 0 which can reveal bugs in the drivers
imageblit, fillrect and copyarea functions. (I think cfbfillrect may have
this buglet). A workaround is to use a standard 8x16 font.
Speed:
The scrolling speed difference between 0 and 180 degrees is minimal,
somewhere areound 1-2%. At 90 or 270 degress, speed drops down to a vicinity
of 30-40%. This is understandable because the blit direction is across the
framebuffer "direction." Scrolling will be helped at these angles if xpanstep
is not equal to zero, use of 8x16 fonts, and setting xres_virtual >= xres * 2.
Note: The code is tested on little-endian only, so I don't know if it will
work in big-endian. Please let me know, it will take only less than a minute
of your time.
This patch prepares fbcon for console rotation and contains the following
changes:
- add rotate field in struct fbcon_ops to keep fbcon's current rotation
angle
- add con_rotate field in struct display to store per-display rotation angle
- create a private copy of the current var to fbcon. This will prevent
fbcon from directly manipulating info->var, especially the fields xoffset,
yoffset and vmode.
- add ability to swap pertinent axes (xres, yres; xpanstep, ypanstep; etc)
depending on the rotation angle
- change global update_var() (function that sets the screen start address)
as an fbcon method update_start. This is required because the axes, start
offset, and/or direction can be reversed depending on the rotation angle.
- add fbcon method rotate_font() which will rotate each character bitmap to
the correct angle of rotation.
- add fbcon boot option 'rotate' to select the angle of rotation at bootime.
Currently does nothing until all patches are applied.
Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-11-09 12:39:09 +07:00
|
|
|
var.yoffset = info->var.yoffset;
|
|
|
|
|
var.xoffset = info->var.xoffset;
|
|
|
|
|
var.vmode = info->var.vmode;
|
2005-04-17 05:20:36 +07:00
|
|
|
fb_set_var(info, &var);
|
[PATCH] fbcon: Console Rotation - Prepare fbcon for console rotation
This patch series implements generic code to rotate the console at 90, 180,
and 270 degrees. The implementation is completely done in the framebuffer
console level, thus no changes to the framebuffer layer or to the drivers
are needed.
Console rotation is required by some Sharp-based devices where the natural
orientation of the display is not at 0 degrees. Also, users that have
displays that can pivot will benefit by having a console in portrait mode
if they so desire.
The choice to implement the code in the console layer rather than in the
framebuffer layer is due to the following reasons:
- it's fast
- it does not require driver changes
- it can coexist with devices that can rotate the display at the hardware level
- it complements graphics applications that can do display rotation
The changes to core fbcon are minimal-- recognition of the console
rotation angle so it can swap directions, origins and axes (xres vs yres,
xpanstep vs ypanstep, xoffset vs yoffset, etc) and storage of the rotation
angle per display. The bulk of the code that does the actual drawing to the
screen are placed in separate files. Each angle of rotation has separate
methods (bmove, clear, putcs, cursor, update_start which is derived from
update_var, and clear_margins). To mimimize processing time, the fontdata
are pre-rotated at each console switch (only if the font or the angle has
changed).
The option can be compiled out (CONFIG_FRAMEBUFFER_CONSOLE_ROTATION = n) if
rotation is not needed.
Choosing the rotation angle can be done in several ways:
1. boot option fbcon=rotate:n, where
n = 0 - normal
n = 1 - 90 degrees (clockwise)
n = 2 - 180 degrees (upside down)
n = 3 - 270 degrees (counterclockwise)
2. echo n > /sys/class/graphics/fb[num]/con_rotate
where n is the same as described above. It sets the angle of rotation
of the current console
3 echo n > /sys/class/graphics/fb[num]/con_rotate_all
where n is the same as described above. Globally sets the angle of
rotation.
GOTCHAS:
The option, especially at angles of 90 and 270 degrees, will exercise
the least used code of drivers. Namely, at these angles, panning is done
in the x-axis, so it can reveal bugs in the driver if xpanstep is set
incorrectly. A workaround is to set xpanstep = 0.
Secondly, at these angles, the framebuffer memory access can be
unaligned if (fontheight * bpp) % 32 ~= 0 which can reveal bugs in the drivers
imageblit, fillrect and copyarea functions. (I think cfbfillrect may have
this buglet). A workaround is to use a standard 8x16 font.
Speed:
The scrolling speed difference between 0 and 180 degrees is minimal,
somewhere areound 1-2%. At 90 or 270 degress, speed drops down to a vicinity
of 30-40%. This is understandable because the blit direction is across the
framebuffer "direction." Scrolling will be helped at these angles if xpanstep
is not equal to zero, use of 8x16 fonts, and setting xres_virtual >= xres * 2.
Note: The code is tested on little-endian only, so I don't know if it will
work in big-endian. Please let me know, it will take only less than a minute
of your time.
This patch prepares fbcon for console rotation and contains the following
changes:
- add rotate field in struct fbcon_ops to keep fbcon's current rotation
angle
- add con_rotate field in struct display to store per-display rotation angle
- create a private copy of the current var to fbcon. This will prevent
fbcon from directly manipulating info->var, especially the fields xoffset,
yoffset and vmode.
- add ability to swap pertinent axes (xres, yres; xpanstep, ypanstep; etc)
depending on the rotation angle
- change global update_var() (function that sets the screen start address)
as an fbcon method update_start. This is required because the axes, start
offset, and/or direction can be reversed depending on the rotation angle.
- add fbcon method rotate_font() which will rotate each character bitmap to
the correct angle of rotation.
- add fbcon boot option 'rotate' to select the angle of rotation at bootime.
Currently does nothing until all patches are applied.
Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-11-09 12:39:09 +07:00
|
|
|
ops->var = info->var;
|
2005-04-17 05:20:36 +07:00
|
|
|
|
2005-09-10 03:10:00 +07:00
|
|
|
if (old_info != NULL && old_info != info) {
|
|
|
|
|
if (info->fbops->fb_set_par)
|
|
|
|
|
info->fbops->fb_set_par(info);
|
|
|
|
|
fbcon_del_cursor_timer(old_info);
|
|
|
|
|
fbcon_add_cursor_timer(info);
|
|
|
|
|
}
|
2005-04-17 05:20:36 +07:00
|
|
|
|
|
|
|
|
set_blitting_type(vc, info, p);
|
[PATCH] fbcon: Console Rotation - Prepare fbcon for console rotation
This patch series implements generic code to rotate the console at 90, 180,
and 270 degrees. The implementation is completely done in the framebuffer
console level, thus no changes to the framebuffer layer or to the drivers
are needed.
Console rotation is required by some Sharp-based devices where the natural
orientation of the display is not at 0 degrees. Also, users that have
displays that can pivot will benefit by having a console in portrait mode
if they so desire.
The choice to implement the code in the console layer rather than in the
framebuffer layer is due to the following reasons:
- it's fast
- it does not require driver changes
- it can coexist with devices that can rotate the display at the hardware level
- it complements graphics applications that can do display rotation
The changes to core fbcon are minimal-- recognition of the console
rotation angle so it can swap directions, origins and axes (xres vs yres,
xpanstep vs ypanstep, xoffset vs yoffset, etc) and storage of the rotation
angle per display. The bulk of the code that does the actual drawing to the
screen are placed in separate files. Each angle of rotation has separate
methods (bmove, clear, putcs, cursor, update_start which is derived from
update_var, and clear_margins). To mimimize processing time, the fontdata
are pre-rotated at each console switch (only if the font or the angle has
changed).
The option can be compiled out (CONFIG_FRAMEBUFFER_CONSOLE_ROTATION = n) if
rotation is not needed.
Choosing the rotation angle can be done in several ways:
1. boot option fbcon=rotate:n, where
n = 0 - normal
n = 1 - 90 degrees (clockwise)
n = 2 - 180 degrees (upside down)
n = 3 - 270 degrees (counterclockwise)
2. echo n > /sys/class/graphics/fb[num]/con_rotate
where n is the same as described above. It sets the angle of rotation
of the current console
3 echo n > /sys/class/graphics/fb[num]/con_rotate_all
where n is the same as described above. Globally sets the angle of
rotation.
GOTCHAS:
The option, especially at angles of 90 and 270 degrees, will exercise
the least used code of drivers. Namely, at these angles, panning is done
in the x-axis, so it can reveal bugs in the driver if xpanstep is set
incorrectly. A workaround is to set xpanstep = 0.
Secondly, at these angles, the framebuffer memory access can be
unaligned if (fontheight * bpp) % 32 ~= 0 which can reveal bugs in the drivers
imageblit, fillrect and copyarea functions. (I think cfbfillrect may have
this buglet). A workaround is to use a standard 8x16 font.
Speed:
The scrolling speed difference between 0 and 180 degrees is minimal,
somewhere areound 1-2%. At 90 or 270 degress, speed drops down to a vicinity
of 30-40%. This is understandable because the blit direction is across the
framebuffer "direction." Scrolling will be helped at these angles if xpanstep
is not equal to zero, use of 8x16 fonts, and setting xres_virtual >= xres * 2.
Note: The code is tested on little-endian only, so I don't know if it will
work in big-endian. Please let me know, it will take only less than a minute
of your time.
This patch prepares fbcon for console rotation and contains the following
changes:
- add rotate field in struct fbcon_ops to keep fbcon's current rotation
angle
- add con_rotate field in struct display to store per-display rotation angle
- create a private copy of the current var to fbcon. This will prevent
fbcon from directly manipulating info->var, especially the fields xoffset,
yoffset and vmode.
- add ability to swap pertinent axes (xres, yres; xpanstep, ypanstep; etc)
depending on the rotation angle
- change global update_var() (function that sets the screen start address)
as an fbcon method update_start. This is required because the axes, start
offset, and/or direction can be reversed depending on the rotation angle.
- add fbcon method rotate_font() which will rotate each character bitmap to
the correct angle of rotation.
- add fbcon boot option 'rotate' to select the angle of rotation at bootime.
Currently does nothing until all patches are applied.
Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-11-09 12:39:09 +07:00
|
|
|
ops->cursor_reset = 1;
|
|
|
|
|
|
|
|
|
|
if (ops->rotate_font && ops->rotate_font(info, vc, p)) {
|
|
|
|
|
ops->rotate = FB_ROTATE_UR;
|
|
|
|
|
set_blitting_type(vc, info, p);
|
|
|
|
|
}
|
2005-04-17 05:20:36 +07:00
|
|
|
|
2005-09-10 03:04:37 +07:00
|
|
|
vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
|
2005-04-17 05:20:36 +07:00
|
|
|
vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
|
|
|
|
|
updatescrollmode(p, info, vc);
|
|
|
|
|
|
|
|
|
|
switch (p->scrollmode) {
|
|
|
|
|
case SCROLL_WRAP_MOVE:
|
|
|
|
|
scrollback_phys_max = p->vrows - vc->vc_rows;
|
|
|
|
|
break;
|
|
|
|
|
case SCROLL_PAN_MOVE:
|
|
|
|
|
case SCROLL_PAN_REDRAW:
|
|
|
|
|
scrollback_phys_max = p->vrows - 2 * vc->vc_rows;
|
|
|
|
|
if (scrollback_phys_max < 0)
|
|
|
|
|
scrollback_phys_max = 0;
|
|
|
|
|
break;
|
|
|
|
|
default:
|
|
|
|
|
scrollback_phys_max = 0;
|
|
|
|
|
break;
|
|
|
|
|
}
|
[PATCH] fbcon: Console Rotation - Prepare fbcon for console rotation
This patch series implements generic code to rotate the console at 90, 180,
and 270 degrees. The implementation is completely done in the framebuffer
console level, thus no changes to the framebuffer layer or to the drivers
are needed.
Console rotation is required by some Sharp-based devices where the natural
orientation of the display is not at 0 degrees. Also, users that have
displays that can pivot will benefit by having a console in portrait mode
if they so desire.
The choice to implement the code in the console layer rather than in the
framebuffer layer is due to the following reasons:
- it's fast
- it does not require driver changes
- it can coexist with devices that can rotate the display at the hardware level
- it complements graphics applications that can do display rotation
The changes to core fbcon are minimal-- recognition of the console
rotation angle so it can swap directions, origins and axes (xres vs yres,
xpanstep vs ypanstep, xoffset vs yoffset, etc) and storage of the rotation
angle per display. The bulk of the code that does the actual drawing to the
screen are placed in separate files. Each angle of rotation has separate
methods (bmove, clear, putcs, cursor, update_start which is derived from
update_var, and clear_margins). To mimimize processing time, the fontdata
are pre-rotated at each console switch (only if the font or the angle has
changed).
The option can be compiled out (CONFIG_FRAMEBUFFER_CONSOLE_ROTATION = n) if
rotation is not needed.
Choosing the rotation angle can be done in several ways:
1. boot option fbcon=rotate:n, where
n = 0 - normal
n = 1 - 90 degrees (clockwise)
n = 2 - 180 degrees (upside down)
n = 3 - 270 degrees (counterclockwise)
2. echo n > /sys/class/graphics/fb[num]/con_rotate
where n is the same as described above. It sets the angle of rotation
of the current console
3 echo n > /sys/class/graphics/fb[num]/con_rotate_all
where n is the same as described above. Globally sets the angle of
rotation.
GOTCHAS:
The option, especially at angles of 90 and 270 degrees, will exercise
the least used code of drivers. Namely, at these angles, panning is done
in the x-axis, so it can reveal bugs in the driver if xpanstep is set
incorrectly. A workaround is to set xpanstep = 0.
Secondly, at these angles, the framebuffer memory access can be
unaligned if (fontheight * bpp) % 32 ~= 0 which can reveal bugs in the drivers
imageblit, fillrect and copyarea functions. (I think cfbfillrect may have
this buglet). A workaround is to use a standard 8x16 font.
Speed:
The scrolling speed difference between 0 and 180 degrees is minimal,
somewhere areound 1-2%. At 90 or 270 degress, speed drops down to a vicinity
of 30-40%. This is understandable because the blit direction is across the
framebuffer "direction." Scrolling will be helped at these angles if xpanstep
is not equal to zero, use of 8x16 fonts, and setting xres_virtual >= xres * 2.
Note: The code is tested on little-endian only, so I don't know if it will
work in big-endian. Please let me know, it will take only less than a minute
of your time.
This patch prepares fbcon for console rotation and contains the following
changes:
- add rotate field in struct fbcon_ops to keep fbcon's current rotation
angle
- add con_rotate field in struct display to store per-display rotation angle
- create a private copy of the current var to fbcon. This will prevent
fbcon from directly manipulating info->var, especially the fields xoffset,
yoffset and vmode.
- add ability to swap pertinent axes (xres, yres; xpanstep, ypanstep; etc)
depending on the rotation angle
- change global update_var() (function that sets the screen start address)
as an fbcon method update_start. This is required because the axes, start
offset, and/or direction can be reversed depending on the rotation angle.
- add fbcon method rotate_font() which will rotate each character bitmap to
the correct angle of rotation.
- add fbcon boot option 'rotate' to select the angle of rotation at bootime.
Currently does nothing until all patches are applied.
Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-11-09 12:39:09 +07:00
|
|
|
|
2005-04-17 05:20:36 +07:00
|
|
|
scrollback_max = 0;
|
|
|
|
|
scrollback_current = 0;
|
[PATCH] fbcon: Console Rotation - Prepare fbcon for console rotation
This patch series implements generic code to rotate the console at 90, 180,
and 270 degrees. The implementation is completely done in the framebuffer
console level, thus no changes to the framebuffer layer or to the drivers
are needed.
Console rotation is required by some Sharp-based devices where the natural
orientation of the display is not at 0 degrees. Also, users that have
displays that can pivot will benefit by having a console in portrait mode
if they so desire.
The choice to implement the code in the console layer rather than in the
framebuffer layer is due to the following reasons:
- it's fast
- it does not require driver changes
- it can coexist with devices that can rotate the display at the hardware level
- it complements graphics applications that can do display rotation
The changes to core fbcon are minimal-- recognition of the console
rotation angle so it can swap directions, origins and axes (xres vs yres,
xpanstep vs ypanstep, xoffset vs yoffset, etc) and storage of the rotation
angle per display. The bulk of the code that does the actual drawing to the
screen are placed in separate files. Each angle of rotation has separate
methods (bmove, clear, putcs, cursor, update_start which is derived from
update_var, and clear_margins). To mimimize processing time, the fontdata
are pre-rotated at each console switch (only if the font or the angle has
changed).
The option can be compiled out (CONFIG_FRAMEBUFFER_CONSOLE_ROTATION = n) if
rotation is not needed.
Choosing the rotation angle can be done in several ways:
1. boot option fbcon=rotate:n, where
n = 0 - normal
n = 1 - 90 degrees (clockwise)
n = 2 - 180 degrees (upside down)
n = 3 - 270 degrees (counterclockwise)
2. echo n > /sys/class/graphics/fb[num]/con_rotate
where n is the same as described above. It sets the angle of rotation
of the current console
3 echo n > /sys/class/graphics/fb[num]/con_rotate_all
where n is the same as described above. Globally sets the angle of
rotation.
GOTCHAS:
The option, especially at angles of 90 and 270 degrees, will exercise
the least used code of drivers. Namely, at these angles, panning is done
in the x-axis, so it can reveal bugs in the driver if xpanstep is set
incorrectly. A workaround is to set xpanstep = 0.
Secondly, at these angles, the framebuffer memory access can be
unaligned if (fontheight * bpp) % 32 ~= 0 which can reveal bugs in the drivers
imageblit, fillrect and copyarea functions. (I think cfbfillrect may have
this buglet). A workaround is to use a standard 8x16 font.
Speed:
The scrolling speed difference between 0 and 180 degrees is minimal,
somewhere areound 1-2%. At 90 or 270 degress, speed drops down to a vicinity
of 30-40%. This is understandable because the blit direction is across the
framebuffer "direction." Scrolling will be helped at these angles if xpanstep
is not equal to zero, use of 8x16 fonts, and setting xres_virtual >= xres * 2.
Note: The code is tested on little-endian only, so I don't know if it will
work in big-endian. Please let me know, it will take only less than a minute
of your time.
This patch prepares fbcon for console rotation and contains the following
changes:
- add rotate field in struct fbcon_ops to keep fbcon's current rotation
angle
- add con_rotate field in struct display to store per-display rotation angle
- create a private copy of the current var to fbcon. This will prevent
fbcon from directly manipulating info->var, especially the fields xoffset,
yoffset and vmode.
- add ability to swap pertinent axes (xres, yres; xpanstep, ypanstep; etc)
depending on the rotation angle
- change global update_var() (function that sets the screen start address)
as an fbcon method update_start. This is required because the axes, start
offset, and/or direction can be reversed depending on the rotation angle.
- add fbcon method rotate_font() which will rotate each character bitmap to
the correct angle of rotation.
- add fbcon boot option 'rotate' to select the angle of rotation at bootime.
Currently does nothing until all patches are applied.
Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-11-09 12:39:09 +07:00
|
|
|
ops->var.xoffset = ops->var.yoffset = p->yscroll = 0;
|
|
|
|
|
ops->update_start(info);
|
2005-04-17 05:20:36 +07:00
|
|
|
fbcon_set_palette(vc, color_table);
|
|
|
|
|
fbcon_clear_margins(vc, 0);
|
|
|
|
|
|
|
|
|
|
if (logo_shown == FBCON_LOGO_DRAW) {
|
|
|
|
|
|
|
|
|
|
logo_shown = fg_console;
|
|
|
|
|
/* This is protected above by initmem_freed */
|
2005-11-09 12:39:10 +07:00
|
|
|
fb_show_logo(info, ops->rotate);
|
2005-04-17 05:20:36 +07:00
|
|
|
update_region(vc,
|
|
|
|
|
vc->vc_origin + vc->vc_size_row * vc->vc_top,
|
|
|
|
|
vc->vc_size_row * (vc->vc_bottom -
|
|
|
|
|
vc->vc_top) / 2);
|
|
|
|
|
return 0;
|
|
|
|
|
}
|
|
|
|
|
return 1;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static void fbcon_generic_blank(struct vc_data *vc, struct fb_info *info,
|
|
|
|
|
int blank)
|
|
|
|
|
{
|
|
|
|
|
if (blank) {
|
|
|
|
|
unsigned short charmask = vc->vc_hi_font_mask ?
|
|
|
|
|
0x1ff : 0xff;
|
|
|
|
|
unsigned short oldc;
|
|
|
|
|
|
|
|
|
|
oldc = vc->vc_video_erase_char;
|
|
|
|
|
vc->vc_video_erase_char &= charmask;
|
|
|
|
|
fbcon_clear(vc, 0, 0, vc->vc_rows, vc->vc_cols);
|
|
|
|
|
vc->vc_video_erase_char = oldc;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static int fbcon_blank(struct vc_data *vc, int blank, int mode_switch)
|
|
|
|
|
{
|
|
|
|
|
struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
|
|
|
|
|
struct fbcon_ops *ops = info->fbcon_par;
|
|
|
|
|
|
|
|
|
|
if (mode_switch) {
|
|
|
|
|
struct fb_var_screeninfo var = info->var;
|
|
|
|
|
|
|
|
|
|
ops->graphics = 1;
|
|
|
|
|
|
|
|
|
|
if (!blank) {
|
|
|
|
|
var.activate = FB_ACTIVATE_NOW | FB_ACTIVATE_FORCE;
|
|
|
|
|
fb_set_var(info, &var);
|
|
|
|
|
ops->graphics = 0;
|
[PATCH] fbcon: Console Rotation - Prepare fbcon for console rotation
This patch series implements generic code to rotate the console at 90, 180,
and 270 degrees. The implementation is completely done in the framebuffer
console level, thus no changes to the framebuffer layer or to the drivers
are needed.
Console rotation is required by some Sharp-based devices where the natural
orientation of the display is not at 0 degrees. Also, users that have
displays that can pivot will benefit by having a console in portrait mode
if they so desire.
The choice to implement the code in the console layer rather than in the
framebuffer layer is due to the following reasons:
- it's fast
- it does not require driver changes
- it can coexist with devices that can rotate the display at the hardware level
- it complements graphics applications that can do display rotation
The changes to core fbcon are minimal-- recognition of the console
rotation angle so it can swap directions, origins and axes (xres vs yres,
xpanstep vs ypanstep, xoffset vs yoffset, etc) and storage of the rotation
angle per display. The bulk of the code that does the actual drawing to the
screen are placed in separate files. Each angle of rotation has separate
methods (bmove, clear, putcs, cursor, update_start which is derived from
update_var, and clear_margins). To mimimize processing time, the fontdata
are pre-rotated at each console switch (only if the font or the angle has
changed).
The option can be compiled out (CONFIG_FRAMEBUFFER_CONSOLE_ROTATION = n) if
rotation is not needed.
Choosing the rotation angle can be done in several ways:
1. boot option fbcon=rotate:n, where
n = 0 - normal
n = 1 - 90 degrees (clockwise)
n = 2 - 180 degrees (upside down)
n = 3 - 270 degrees (counterclockwise)
2. echo n > /sys/class/graphics/fb[num]/con_rotate
where n is the same as described above. It sets the angle of rotation
of the current console
3 echo n > /sys/class/graphics/fb[num]/con_rotate_all
where n is the same as described above. Globally sets the angle of
rotation.
GOTCHAS:
The option, especially at angles of 90 and 270 degrees, will exercise
the least used code of drivers. Namely, at these angles, panning is done
in the x-axis, so it can reveal bugs in the driver if xpanstep is set
incorrectly. A workaround is to set xpanstep = 0.
Secondly, at these angles, the framebuffer memory access can be
unaligned if (fontheight * bpp) % 32 ~= 0 which can reveal bugs in the drivers
imageblit, fillrect and copyarea functions. (I think cfbfillrect may have
this buglet). A workaround is to use a standard 8x16 font.
Speed:
The scrolling speed difference between 0 and 180 degrees is minimal,
somewhere areound 1-2%. At 90 or 270 degress, speed drops down to a vicinity
of 30-40%. This is understandable because the blit direction is across the
framebuffer "direction." Scrolling will be helped at these angles if xpanstep
is not equal to zero, use of 8x16 fonts, and setting xres_virtual >= xres * 2.
Note: The code is tested on little-endian only, so I don't know if it will
work in big-endian. Please let me know, it will take only less than a minute
of your time.
This patch prepares fbcon for console rotation and contains the following
changes:
- add rotate field in struct fbcon_ops to keep fbcon's current rotation
angle
- add con_rotate field in struct display to store per-display rotation angle
- create a private copy of the current var to fbcon. This will prevent
fbcon from directly manipulating info->var, especially the fields xoffset,
yoffset and vmode.
- add ability to swap pertinent axes (xres, yres; xpanstep, ypanstep; etc)
depending on the rotation angle
- change global update_var() (function that sets the screen start address)
as an fbcon method update_start. This is required because the axes, start
offset, and/or direction can be reversed depending on the rotation angle.
- add fbcon method rotate_font() which will rotate each character bitmap to
the correct angle of rotation.
- add fbcon boot option 'rotate' to select the angle of rotation at bootime.
Currently does nothing until all patches are applied.
Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-11-09 12:39:09 +07:00
|
|
|
ops->var = info->var;
|
2005-04-17 05:20:36 +07:00
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if (!fbcon_is_inactive(vc, info)) {
|
|
|
|
|
if (ops->blank_state != blank) {
|
|
|
|
|
ops->blank_state = blank;
|
|
|
|
|
fbcon_cursor(vc, blank ? CM_ERASE : CM_DRAW);
|
|
|
|
|
ops->cursor_flash = (!blank);
|
|
|
|
|
|
|
|
|
|
if (fb_blank(info, blank))
|
|
|
|
|
fbcon_generic_blank(vc, info, blank);
|
|
|
|
|
}
|
|
|
|
|
|
2005-09-10 03:10:00 +07:00
|
|
|
if (!blank)
|
|
|
|
|
update_screen(vc);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if (!blank)
|
|
|
|
|
fbcon_add_cursor_timer(info);
|
|
|
|
|
else
|
|
|
|
|
fbcon_del_cursor_timer(info);
|
2005-04-17 05:20:36 +07:00
|
|
|
|
2005-09-10 03:10:00 +07:00
|
|
|
return 0;
|
2005-04-17 05:20:36 +07:00
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static void fbcon_free_font(struct display *p)
|
|
|
|
|
{
|
|
|
|
|
if (p->userfont && p->fontdata && (--REFCOUNT(p->fontdata) == 0))
|
|
|
|
|
kfree(p->fontdata - FONT_EXTRA_WORDS * sizeof(int));
|
|
|
|
|
p->fontdata = NULL;
|
|
|
|
|
p->userfont = 0;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static int fbcon_get_font(struct vc_data *vc, struct console_font *font)
|
|
|
|
|
{
|
|
|
|
|
u8 *fontdata = vc->vc_font.data;
|
|
|
|
|
u8 *data = font->data;
|
|
|
|
|
int i, j;
|
|
|
|
|
|
|
|
|
|
font->width = vc->vc_font.width;
|
|
|
|
|
font->height = vc->vc_font.height;
|
|
|
|
|
font->charcount = vc->vc_hi_font_mask ? 512 : 256;
|
|
|
|
|
if (!font->data)
|
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
|
|
if (font->width <= 8) {
|
|
|
|
|
j = vc->vc_font.height;
|
|
|
|
|
for (i = 0; i < font->charcount; i++) {
|
|
|
|
|
memcpy(data, fontdata, j);
|
|
|
|
|
memset(data + j, 0, 32 - j);
|
|
|
|
|
data += 32;
|
|
|
|
|
fontdata += j;
|
|
|
|
|
}
|
|
|
|
|
} else if (font->width <= 16) {
|
|
|
|
|
j = vc->vc_font.height * 2;
|
|
|
|
|
for (i = 0; i < font->charcount; i++) {
|
|
|
|
|
memcpy(data, fontdata, j);
|
|
|
|
|
memset(data + j, 0, 64 - j);
|
|
|
|
|
data += 64;
|
|
|
|
|
fontdata += j;
|
|
|
|
|
}
|
|
|
|
|
} else if (font->width <= 24) {
|
|
|
|
|
for (i = 0; i < font->charcount; i++) {
|
|
|
|
|
for (j = 0; j < vc->vc_font.height; j++) {
|
|
|
|
|
*data++ = fontdata[0];
|
|
|
|
|
*data++ = fontdata[1];
|
|
|
|
|
*data++ = fontdata[2];
|
|
|
|
|
fontdata += sizeof(u32);
|
|
|
|
|
}
|
|
|
|
|
memset(data, 0, 3 * (32 - j));
|
|
|
|
|
data += 3 * (32 - j);
|
|
|
|
|
}
|
|
|
|
|
} else {
|
|
|
|
|
j = vc->vc_font.height * 4;
|
|
|
|
|
for (i = 0; i < font->charcount; i++) {
|
|
|
|
|
memcpy(data, fontdata, j);
|
|
|
|
|
memset(data + j, 0, 128 - j);
|
|
|
|
|
data += 128;
|
|
|
|
|
fontdata += j;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
return 0;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static int fbcon_do_set_font(struct vc_data *vc, int w, int h,
|
2005-09-13 15:25:44 +07:00
|
|
|
const u8 * data, int userfont)
|
2005-04-17 05:20:36 +07:00
|
|
|
{
|
|
|
|
|
struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
|
[PATCH] fbcon: Console Rotation - Prepare fbcon for console rotation
This patch series implements generic code to rotate the console at 90, 180,
and 270 degrees. The implementation is completely done in the framebuffer
console level, thus no changes to the framebuffer layer or to the drivers
are needed.
Console rotation is required by some Sharp-based devices where the natural
orientation of the display is not at 0 degrees. Also, users that have
displays that can pivot will benefit by having a console in portrait mode
if they so desire.
The choice to implement the code in the console layer rather than in the
framebuffer layer is due to the following reasons:
- it's fast
- it does not require driver changes
- it can coexist with devices that can rotate the display at the hardware level
- it complements graphics applications that can do display rotation
The changes to core fbcon are minimal-- recognition of the console
rotation angle so it can swap directions, origins and axes (xres vs yres,
xpanstep vs ypanstep, xoffset vs yoffset, etc) and storage of the rotation
angle per display. The bulk of the code that does the actual drawing to the
screen are placed in separate files. Each angle of rotation has separate
methods (bmove, clear, putcs, cursor, update_start which is derived from
update_var, and clear_margins). To mimimize processing time, the fontdata
are pre-rotated at each console switch (only if the font or the angle has
changed).
The option can be compiled out (CONFIG_FRAMEBUFFER_CONSOLE_ROTATION = n) if
rotation is not needed.
Choosing the rotation angle can be done in several ways:
1. boot option fbcon=rotate:n, where
n = 0 - normal
n = 1 - 90 degrees (clockwise)
n = 2 - 180 degrees (upside down)
n = 3 - 270 degrees (counterclockwise)
2. echo n > /sys/class/graphics/fb[num]/con_rotate
where n is the same as described above. It sets the angle of rotation
of the current console
3 echo n > /sys/class/graphics/fb[num]/con_rotate_all
where n is the same as described above. Globally sets the angle of
rotation.
GOTCHAS:
The option, especially at angles of 90 and 270 degrees, will exercise
the least used code of drivers. Namely, at these angles, panning is done
in the x-axis, so it can reveal bugs in the driver if xpanstep is set
incorrectly. A workaround is to set xpanstep = 0.
Secondly, at these angles, the framebuffer memory access can be
unaligned if (fontheight * bpp) % 32 ~= 0 which can reveal bugs in the drivers
imageblit, fillrect and copyarea functions. (I think cfbfillrect may have
this buglet). A workaround is to use a standard 8x16 font.
Speed:
The scrolling speed difference between 0 and 180 degrees is minimal,
somewhere areound 1-2%. At 90 or 270 degress, speed drops down to a vicinity
of 30-40%. This is understandable because the blit direction is across the
framebuffer "direction." Scrolling will be helped at these angles if xpanstep
is not equal to zero, use of 8x16 fonts, and setting xres_virtual >= xres * 2.
Note: The code is tested on little-endian only, so I don't know if it will
work in big-endian. Please let me know, it will take only less than a minute
of your time.
This patch prepares fbcon for console rotation and contains the following
changes:
- add rotate field in struct fbcon_ops to keep fbcon's current rotation
angle
- add con_rotate field in struct display to store per-display rotation angle
- create a private copy of the current var to fbcon. This will prevent
fbcon from directly manipulating info->var, especially the fields xoffset,
yoffset and vmode.
- add ability to swap pertinent axes (xres, yres; xpanstep, ypanstep; etc)
depending on the rotation angle
- change global update_var() (function that sets the screen start address)
as an fbcon method update_start. This is required because the axes, start
offset, and/or direction can be reversed depending on the rotation angle.
- add fbcon method rotate_font() which will rotate each character bitmap to
the correct angle of rotation.
- add fbcon boot option 'rotate' to select the angle of rotation at bootime.
Currently does nothing until all patches are applied.
Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-11-09 12:39:09 +07:00
|
|
|
struct fbcon_ops *ops = info->fbcon_par;
|
2005-04-17 05:20:36 +07:00
|
|
|
struct display *p = &fb_display[vc->vc_num];
|
|
|
|
|
int resize;
|
|
|
|
|
int cnt;
|
|
|
|
|
char *old_data = NULL;
|
|
|
|
|
|
|
|
|
|
if (CON_IS_VISIBLE(vc) && softback_lines)
|
|
|
|
|
fbcon_set_origin(vc);
|
|
|
|
|
|
|
|
|
|
resize = (w != vc->vc_font.width) || (h != vc->vc_font.height);
|
|
|
|
|
if (p->userfont)
|
|
|
|
|
old_data = vc->vc_font.data;
|
|
|
|
|
if (userfont)
|
|
|
|
|
cnt = FNTCHARCNT(data);
|
|
|
|
|
else
|
|
|
|
|
cnt = 256;
|
2005-09-13 15:25:44 +07:00
|
|
|
vc->vc_font.data = (void *)(p->fontdata = data);
|
2005-04-17 05:20:36 +07:00
|
|
|
if ((p->userfont = userfont))
|
|
|
|
|
REFCOUNT(data)++;
|
|
|
|
|
vc->vc_font.width = w;
|
|
|
|
|
vc->vc_font.height = h;
|
|
|
|
|
if (vc->vc_hi_font_mask && cnt == 256) {
|
|
|
|
|
vc->vc_hi_font_mask = 0;
|
|
|
|
|
if (vc->vc_can_do_color) {
|
|
|
|
|
vc->vc_complement_mask >>= 1;
|
|
|
|
|
vc->vc_s_complement_mask >>= 1;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* ++Edmund: reorder the attribute bits */
|
|
|
|
|
if (vc->vc_can_do_color) {
|
|
|
|
|
unsigned short *cp =
|
|
|
|
|
(unsigned short *) vc->vc_origin;
|
|
|
|
|
int count = vc->vc_screenbuf_size / 2;
|
|
|
|
|
unsigned short c;
|
|
|
|
|
for (; count > 0; count--, cp++) {
|
|
|
|
|
c = scr_readw(cp);
|
|
|
|
|
scr_writew(((c & 0xfe00) >> 1) |
|
|
|
|
|
(c & 0xff), cp);
|
|
|
|
|
}
|
|
|
|
|
c = vc->vc_video_erase_char;
|
|
|
|
|
vc->vc_video_erase_char =
|
|
|
|
|
((c & 0xfe00) >> 1) | (c & 0xff);
|
|
|
|
|
vc->vc_attr >>= 1;
|
|
|
|
|
}
|
|
|
|
|
} else if (!vc->vc_hi_font_mask && cnt == 512) {
|
|
|
|
|
vc->vc_hi_font_mask = 0x100;
|
|
|
|
|
if (vc->vc_can_do_color) {
|
|
|
|
|
vc->vc_complement_mask <<= 1;
|
|
|
|
|
vc->vc_s_complement_mask <<= 1;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* ++Edmund: reorder the attribute bits */
|
|
|
|
|
{
|
|
|
|
|
unsigned short *cp =
|
|
|
|
|
(unsigned short *) vc->vc_origin;
|
|
|
|
|
int count = vc->vc_screenbuf_size / 2;
|
|
|
|
|
unsigned short c;
|
|
|
|
|
for (; count > 0; count--, cp++) {
|
|
|
|
|
unsigned short newc;
|
|
|
|
|
c = scr_readw(cp);
|
|
|
|
|
if (vc->vc_can_do_color)
|
|
|
|
|
newc =
|
|
|
|
|
((c & 0xff00) << 1) | (c &
|
|
|
|
|
0xff);
|
|
|
|
|
else
|
|
|
|
|
newc = c & ~0x100;
|
|
|
|
|
scr_writew(newc, cp);
|
|
|
|
|
}
|
|
|
|
|
c = vc->vc_video_erase_char;
|
|
|
|
|
if (vc->vc_can_do_color) {
|
|
|
|
|
vc->vc_video_erase_char =
|
|
|
|
|
((c & 0xff00) << 1) | (c & 0xff);
|
|
|
|
|
vc->vc_attr <<= 1;
|
|
|
|
|
} else
|
|
|
|
|
vc->vc_video_erase_char = c & ~0x100;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if (resize) {
|
[PATCH] fbcon: Console Rotation - Prepare fbcon for console rotation
This patch series implements generic code to rotate the console at 90, 180,
and 270 degrees. The implementation is completely done in the framebuffer
console level, thus no changes to the framebuffer layer or to the drivers
are needed.
Console rotation is required by some Sharp-based devices where the natural
orientation of the display is not at 0 degrees. Also, users that have
displays that can pivot will benefit by having a console in portrait mode
if they so desire.
The choice to implement the code in the console layer rather than in the
framebuffer layer is due to the following reasons:
- it's fast
- it does not require driver changes
- it can coexist with devices that can rotate the display at the hardware level
- it complements graphics applications that can do display rotation
The changes to core fbcon are minimal-- recognition of the console
rotation angle so it can swap directions, origins and axes (xres vs yres,
xpanstep vs ypanstep, xoffset vs yoffset, etc) and storage of the rotation
angle per display. The bulk of the code that does the actual drawing to the
screen are placed in separate files. Each angle of rotation has separate
methods (bmove, clear, putcs, cursor, update_start which is derived from
update_var, and clear_margins). To mimimize processing time, the fontdata
are pre-rotated at each console switch (only if the font or the angle has
changed).
The option can be compiled out (CONFIG_FRAMEBUFFER_CONSOLE_ROTATION = n) if
rotation is not needed.
Choosing the rotation angle can be done in several ways:
1. boot option fbcon=rotate:n, where
n = 0 - normal
n = 1 - 90 degrees (clockwise)
n = 2 - 180 degrees (upside down)
n = 3 - 270 degrees (counterclockwise)
2. echo n > /sys/class/graphics/fb[num]/con_rotate
where n is the same as described above. It sets the angle of rotation
of the current console
3 echo n > /sys/class/graphics/fb[num]/con_rotate_all
where n is the same as described above. Globally sets the angle of
rotation.
GOTCHAS:
The option, especially at angles of 90 and 270 degrees, will exercise
the least used code of drivers. Namely, at these angles, panning is done
in the x-axis, so it can reveal bugs in the driver if xpanstep is set
incorrectly. A workaround is to set xpanstep = 0.
Secondly, at these angles, the framebuffer memory access can be
unaligned if (fontheight * bpp) % 32 ~= 0 which can reveal bugs in the drivers
imageblit, fillrect and copyarea functions. (I think cfbfillrect may have
this buglet). A workaround is to use a standard 8x16 font.
Speed:
The scrolling speed difference between 0 and 180 degrees is minimal,
somewhere areound 1-2%. At 90 or 270 degress, speed drops down to a vicinity
of 30-40%. This is understandable because the blit direction is across the
framebuffer "direction." Scrolling will be helped at these angles if xpanstep
is not equal to zero, use of 8x16 fonts, and setting xres_virtual >= xres * 2.
Note: The code is tested on little-endian only, so I don't know if it will
work in big-endian. Please let me know, it will take only less than a minute
of your time.
This patch prepares fbcon for console rotation and contains the following
changes:
- add rotate field in struct fbcon_ops to keep fbcon's current rotation
angle
- add con_rotate field in struct display to store per-display rotation angle
- create a private copy of the current var to fbcon. This will prevent
fbcon from directly manipulating info->var, especially the fields xoffset,
yoffset and vmode.
- add ability to swap pertinent axes (xres, yres; xpanstep, ypanstep; etc)
depending on the rotation angle
- change global update_var() (function that sets the screen start address)
as an fbcon method update_start. This is required because the axes, start
offset, and/or direction can be reversed depending on the rotation angle.
- add fbcon method rotate_font() which will rotate each character bitmap to
the correct angle of rotation.
- add fbcon boot option 'rotate' to select the angle of rotation at bootime.
Currently does nothing until all patches are applied.
Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-11-09 12:39:09 +07:00
|
|
|
int cols, rows;
|
|
|
|
|
|
|
|
|
|
cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
|
|
|
|
|
rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
|
|
|
|
|
cols /= w;
|
|
|
|
|
rows /= h;
|
|
|
|
|
vc_resize(vc, cols, rows);
|
2005-11-07 16:00:36 +07:00
|
|
|
if (CON_IS_VISIBLE(vc) && softback_buf)
|
|
|
|
|
fbcon_update_softback(vc);
|
2005-04-17 05:20:36 +07:00
|
|
|
} else if (CON_IS_VISIBLE(vc)
|
|
|
|
|
&& vc->vc_mode == KD_TEXT) {
|
|
|
|
|
fbcon_clear_margins(vc, 0);
|
|
|
|
|
update_screen(vc);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if (old_data && (--REFCOUNT(old_data) == 0))
|
|
|
|
|
kfree(old_data - FONT_EXTRA_WORDS * sizeof(int));
|
|
|
|
|
return 0;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static int fbcon_copy_font(struct vc_data *vc, int con)
|
|
|
|
|
{
|
|
|
|
|
struct display *od = &fb_display[con];
|
|
|
|
|
struct console_font *f = &vc->vc_font;
|
|
|
|
|
|
|
|
|
|
if (od->fontdata == f->data)
|
|
|
|
|
return 0; /* already the same font... */
|
|
|
|
|
return fbcon_do_set_font(vc, f->width, f->height, od->fontdata, od->userfont);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* User asked to set font; we are guaranteed that
|
|
|
|
|
* a) width and height are in range 1..32
|
|
|
|
|
* b) charcount does not exceed 512
|
|
|
|
|
* but lets not assume that, since someone might someday want to use larger
|
|
|
|
|
* fonts. And charcount of 512 is small for unicode support.
|
|
|
|
|
*
|
|
|
|
|
* However, user space gives the font in 32 rows , regardless of
|
|
|
|
|
* actual font height. So a new API is needed if support for larger fonts
|
|
|
|
|
* is ever implemented.
|
|
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
static int fbcon_set_font(struct vc_data *vc, struct console_font *font, unsigned flags)
|
|
|
|
|
{
|
|
|
|
|
unsigned charcount = font->charcount;
|
|
|
|
|
int w = font->width;
|
|
|
|
|
int h = font->height;
|
|
|
|
|
int size;
|
|
|
|
|
int i, csum;
|
|
|
|
|
u8 *new_data, *data = font->data;
|
|
|
|
|
int pitch = (font->width+7) >> 3;
|
|
|
|
|
|
|
|
|
|
/* Is there a reason why fbconsole couldn't handle any charcount >256?
|
|
|
|
|
* If not this check should be changed to charcount < 256 */
|
|
|
|
|
if (charcount != 256 && charcount != 512)
|
|
|
|
|
return -EINVAL;
|
|
|
|
|
|
|
|
|
|
size = h * pitch * charcount;
|
|
|
|
|
|
|
|
|
|
new_data = kmalloc(FONT_EXTRA_WORDS * sizeof(int) + size, GFP_USER);
|
|
|
|
|
|
|
|
|
|
if (!new_data)
|
|
|
|
|
return -ENOMEM;
|
|
|
|
|
|
|
|
|
|
new_data += FONT_EXTRA_WORDS * sizeof(int);
|
|
|
|
|
FNTSIZE(new_data) = size;
|
|
|
|
|
FNTCHARCNT(new_data) = charcount;
|
|
|
|
|
REFCOUNT(new_data) = 0; /* usage counter */
|
|
|
|
|
for (i=0; i< charcount; i++) {
|
|
|
|
|
memcpy(new_data + i*h*pitch, data + i*32*pitch, h*pitch);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* Since linux has a nice crc32 function use it for counting font
|
|
|
|
|
* checksums. */
|
|
|
|
|
csum = crc32(0, new_data, size);
|
|
|
|
|
|
|
|
|
|
FNTSUM(new_data) = csum;
|
|
|
|
|
/* Check if the same font is on some other console already */
|
|
|
|
|
for (i = 0; i < MAX_NR_CONSOLES; i++) {
|
|
|
|
|
struct vc_data *tmp = vc_cons[i].d;
|
|
|
|
|
|
|
|
|
|
if (fb_display[i].userfont &&
|
|
|
|
|
fb_display[i].fontdata &&
|
|
|
|
|
FNTSUM(fb_display[i].fontdata) == csum &&
|
|
|
|
|
FNTSIZE(fb_display[i].fontdata) == size &&
|
|
|
|
|
tmp->vc_font.width == w &&
|
|
|
|
|
!memcmp(fb_display[i].fontdata, new_data, size)) {
|
|
|
|
|
kfree(new_data - FONT_EXTRA_WORDS * sizeof(int));
|
2005-09-13 15:25:44 +07:00
|
|
|
new_data = (u8 *)fb_display[i].fontdata;
|
2005-04-17 05:20:36 +07:00
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
return fbcon_do_set_font(vc, font->width, font->height, new_data, 1);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static int fbcon_set_def_font(struct vc_data *vc, struct console_font *font, char *name)
|
|
|
|
|
{
|
|
|
|
|
struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
|
2005-09-13 15:25:44 +07:00
|
|
|
const struct font_desc *f;
|
2005-04-17 05:20:36 +07:00
|
|
|
|
|
|
|
|
if (!name)
|
|
|
|
|
f = get_default_font(info->var.xres, info->var.yres);
|
|
|
|
|
else if (!(f = find_font(name)))
|
|
|
|
|
return -ENOENT;
|
|
|
|
|
|
|
|
|
|
font->width = f->width;
|
|
|
|
|
font->height = f->height;
|
|
|
|
|
return fbcon_do_set_font(vc, f->width, f->height, f->data, 0);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static u16 palette_red[16];
|
|
|
|
|
static u16 palette_green[16];
|
|
|
|
|
static u16 palette_blue[16];
|
|
|
|
|
|
|
|
|
|
static struct fb_cmap palette_cmap = {
|
|
|
|
|
0, 16, palette_red, palette_green, palette_blue, NULL
|
|
|
|
|
};
|
|
|
|
|
|
|
|
|
|
static int fbcon_set_palette(struct vc_data *vc, unsigned char *table)
|
|
|
|
|
{
|
|
|
|
|
struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
|
|
|
|
|
int i, j, k, depth;
|
|
|
|
|
u8 val;
|
|
|
|
|
|
|
|
|
|
if (fbcon_is_inactive(vc, info))
|
|
|
|
|
return -EINVAL;
|
|
|
|
|
|
|
|
|
|
if (!CON_IS_VISIBLE(vc))
|
|
|
|
|
return 0;
|
|
|
|
|
|
2005-09-10 03:04:37 +07:00
|
|
|
depth = fb_get_color_depth(&info->var, &info->fix);
|
2005-04-17 05:20:36 +07:00
|
|
|
if (depth > 3) {
|
|
|
|
|
for (i = j = 0; i < 16; i++) {
|
|
|
|
|
k = table[i];
|
|
|
|
|
val = vc->vc_palette[j++];
|
|
|
|
|
palette_red[k] = (val << 8) | val;
|
|
|
|
|
val = vc->vc_palette[j++];
|
|
|
|
|
palette_green[k] = (val << 8) | val;
|
|
|
|
|
val = vc->vc_palette[j++];
|
|
|
|
|
palette_blue[k] = (val << 8) | val;
|
|
|
|
|
}
|
|
|
|
|
palette_cmap.len = 16;
|
|
|
|
|
palette_cmap.start = 0;
|
|
|
|
|
/*
|
|
|
|
|
* If framebuffer is capable of less than 16 colors,
|
|
|
|
|
* use default palette of fbcon.
|
|
|
|
|
*/
|
|
|
|
|
} else
|
|
|
|
|
fb_copy_cmap(fb_default_cmap(1 << depth), &palette_cmap);
|
|
|
|
|
|
|
|
|
|
return fb_set_cmap(&palette_cmap, info);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static u16 *fbcon_screen_pos(struct vc_data *vc, int offset)
|
|
|
|
|
{
|
|
|
|
|
unsigned long p;
|
|
|
|
|
int line;
|
|
|
|
|
|
|
|
|
|
if (vc->vc_num != fg_console || !softback_lines)
|
|
|
|
|
return (u16 *) (vc->vc_origin + offset);
|
|
|
|
|
line = offset / vc->vc_size_row;
|
|
|
|
|
if (line >= softback_lines)
|
|
|
|
|
return (u16 *) (vc->vc_origin + offset -
|
|
|
|
|
softback_lines * vc->vc_size_row);
|
|
|
|
|
p = softback_curr + offset;
|
|
|
|
|
if (p >= softback_end)
|
|
|
|
|
p += softback_buf - softback_end;
|
|
|
|
|
return (u16 *) p;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static unsigned long fbcon_getxy(struct vc_data *vc, unsigned long pos,
|
|
|
|
|
int *px, int *py)
|
|
|
|
|
{
|
|
|
|
|
unsigned long ret;
|
|
|
|
|
int x, y;
|
|
|
|
|
|
|
|
|
|
if (pos >= vc->vc_origin && pos < vc->vc_scr_end) {
|
|
|
|
|
unsigned long offset = (pos - vc->vc_origin) / 2;
|
|
|
|
|
|
|
|
|
|
x = offset % vc->vc_cols;
|
|
|
|
|
y = offset / vc->vc_cols;
|
|
|
|
|
if (vc->vc_num == fg_console)
|
|
|
|
|
y += softback_lines;
|
|
|
|
|
ret = pos + (vc->vc_cols - x) * 2;
|
|
|
|
|
} else if (vc->vc_num == fg_console && softback_lines) {
|
|
|
|
|
unsigned long offset = pos - softback_curr;
|
|
|
|
|
|
|
|
|
|
if (pos < softback_curr)
|
|
|
|
|
offset += softback_end - softback_buf;
|
|
|
|
|
offset /= 2;
|
|
|
|
|
x = offset % vc->vc_cols;
|
|
|
|
|
y = offset / vc->vc_cols;
|
|
|
|
|
ret = pos + (vc->vc_cols - x) * 2;
|
|
|
|
|
if (ret == softback_end)
|
|
|
|
|
ret = softback_buf;
|
|
|
|
|
if (ret == softback_in)
|
|
|
|
|
ret = vc->vc_origin;
|
|
|
|
|
} else {
|
|
|
|
|
/* Should not happen */
|
|
|
|
|
x = y = 0;
|
|
|
|
|
ret = vc->vc_origin;
|
|
|
|
|
}
|
|
|
|
|
if (px)
|
|
|
|
|
*px = x;
|
|
|
|
|
if (py)
|
|
|
|
|
*py = y;
|
|
|
|
|
return ret;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* As we might be inside of softback, we may work with non-contiguous buffer,
|
|
|
|
|
that's why we have to use a separate routine. */
|
|
|
|
|
static void fbcon_invert_region(struct vc_data *vc, u16 * p, int cnt)
|
|
|
|
|
{
|
|
|
|
|
while (cnt--) {
|
|
|
|
|
u16 a = scr_readw(p);
|
|
|
|
|
if (!vc->vc_can_do_color)
|
|
|
|
|
a ^= 0x0800;
|
|
|
|
|
else if (vc->vc_hi_font_mask == 0x100)
|
|
|
|
|
a = ((a) & 0x11ff) | (((a) & 0xe000) >> 4) |
|
|
|
|
|
(((a) & 0x0e00) << 4);
|
|
|
|
|
else
|
|
|
|
|
a = ((a) & 0x88ff) | (((a) & 0x7000) >> 4) |
|
|
|
|
|
(((a) & 0x0700) << 4);
|
|
|
|
|
scr_writew(a, p++);
|
|
|
|
|
if (p == (u16 *) softback_end)
|
|
|
|
|
p = (u16 *) softback_buf;
|
|
|
|
|
if (p == (u16 *) softback_in)
|
|
|
|
|
p = (u16 *) vc->vc_origin;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static int fbcon_scrolldelta(struct vc_data *vc, int lines)
|
|
|
|
|
{
|
|
|
|
|
struct fb_info *info = registered_fb[con2fb_map[fg_console]];
|
[PATCH] fbcon: Console Rotation - Prepare fbcon for console rotation
This patch series implements generic code to rotate the console at 90, 180,
and 270 degrees. The implementation is completely done in the framebuffer
console level, thus no changes to the framebuffer layer or to the drivers
are needed.
Console rotation is required by some Sharp-based devices where the natural
orientation of the display is not at 0 degrees. Also, users that have
displays that can pivot will benefit by having a console in portrait mode
if they so desire.
The choice to implement the code in the console layer rather than in the
framebuffer layer is due to the following reasons:
- it's fast
- it does not require driver changes
- it can coexist with devices that can rotate the display at the hardware level
- it complements graphics applications that can do display rotation
The changes to core fbcon are minimal-- recognition of the console
rotation angle so it can swap directions, origins and axes (xres vs yres,
xpanstep vs ypanstep, xoffset vs yoffset, etc) and storage of the rotation
angle per display. The bulk of the code that does the actual drawing to the
screen are placed in separate files. Each angle of rotation has separate
methods (bmove, clear, putcs, cursor, update_start which is derived from
update_var, and clear_margins). To mimimize processing time, the fontdata
are pre-rotated at each console switch (only if the font or the angle has
changed).
The option can be compiled out (CONFIG_FRAMEBUFFER_CONSOLE_ROTATION = n) if
rotation is not needed.
Choosing the rotation angle can be done in several ways:
1. boot option fbcon=rotate:n, where
n = 0 - normal
n = 1 - 90 degrees (clockwise)
n = 2 - 180 degrees (upside down)
n = 3 - 270 degrees (counterclockwise)
2. echo n > /sys/class/graphics/fb[num]/con_rotate
where n is the same as described above. It sets the angle of rotation
of the current console
3 echo n > /sys/class/graphics/fb[num]/con_rotate_all
where n is the same as described above. Globally sets the angle of
rotation.
GOTCHAS:
The option, especially at angles of 90 and 270 degrees, will exercise
the least used code of drivers. Namely, at these angles, panning is done
in the x-axis, so it can reveal bugs in the driver if xpanstep is set
incorrectly. A workaround is to set xpanstep = 0.
Secondly, at these angles, the framebuffer memory access can be
unaligned if (fontheight * bpp) % 32 ~= 0 which can reveal bugs in the drivers
imageblit, fillrect and copyarea functions. (I think cfbfillrect may have
this buglet). A workaround is to use a standard 8x16 font.
Speed:
The scrolling speed difference between 0 and 180 degrees is minimal,
somewhere areound 1-2%. At 90 or 270 degress, speed drops down to a vicinity
of 30-40%. This is understandable because the blit direction is across the
framebuffer "direction." Scrolling will be helped at these angles if xpanstep
is not equal to zero, use of 8x16 fonts, and setting xres_virtual >= xres * 2.
Note: The code is tested on little-endian only, so I don't know if it will
work in big-endian. Please let me know, it will take only less than a minute
of your time.
This patch prepares fbcon for console rotation and contains the following
changes:
- add rotate field in struct fbcon_ops to keep fbcon's current rotation
angle
- add con_rotate field in struct display to store per-display rotation angle
- create a private copy of the current var to fbcon. This will prevent
fbcon from directly manipulating info->var, especially the fields xoffset,
yoffset and vmode.
- add ability to swap pertinent axes (xres, yres; xpanstep, ypanstep; etc)
depending on the rotation angle
- change global update_var() (function that sets the screen start address)
as an fbcon method update_start. This is required because the axes, start
offset, and/or direction can be reversed depending on the rotation angle.
- add fbcon method rotate_font() which will rotate each character bitmap to
the correct angle of rotation.
- add fbcon boot option 'rotate' to select the angle of rotation at bootime.
Currently does nothing until all patches are applied.
Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-11-09 12:39:09 +07:00
|
|
|
struct fbcon_ops *ops = info->fbcon_par;
|
2005-04-17 05:20:36 +07:00
|
|
|
struct display *p = &fb_display[fg_console];
|
|
|
|
|
int offset, limit, scrollback_old;
|
|
|
|
|
|
|
|
|
|
if (softback_top) {
|
|
|
|
|
if (vc->vc_num != fg_console)
|
|
|
|
|
return 0;
|
|
|
|
|
if (vc->vc_mode != KD_TEXT || !lines)
|
|
|
|
|
return 0;
|
|
|
|
|
if (logo_shown >= 0) {
|
|
|
|
|
struct vc_data *conp2 = vc_cons[logo_shown].d;
|
|
|
|
|
|
|
|
|
|
if (conp2->vc_top == logo_lines
|
|
|
|
|
&& conp2->vc_bottom == conp2->vc_rows)
|
|
|
|
|
conp2->vc_top = 0;
|
|
|
|
|
if (logo_shown == vc->vc_num) {
|
|
|
|
|
unsigned long p, q;
|
|
|
|
|
int i;
|
|
|
|
|
|
|
|
|
|
p = softback_in;
|
|
|
|
|
q = vc->vc_origin +
|
|
|
|
|
logo_lines * vc->vc_size_row;
|
|
|
|
|
for (i = 0; i < logo_lines; i++) {
|
|
|
|
|
if (p == softback_top)
|
|
|
|
|
break;
|
|
|
|
|
if (p == softback_buf)
|
|
|
|
|
p = softback_end;
|
|
|
|
|
p -= vc->vc_size_row;
|
|
|
|
|
q -= vc->vc_size_row;
|
|
|
|
|
scr_memcpyw((u16 *) q, (u16 *) p,
|
|
|
|
|
vc->vc_size_row);
|
|
|
|
|
}
|
|
|
|
|
softback_in = p;
|
|
|
|
|
update_region(vc, vc->vc_origin,
|
|
|
|
|
logo_lines * vc->vc_cols);
|
|
|
|
|
}
|
|
|
|
|
logo_shown = FBCON_LOGO_CANSHOW;
|
|
|
|
|
}
|
|
|
|
|
fbcon_cursor(vc, CM_ERASE | CM_SOFTBACK);
|
|
|
|
|
fbcon_redraw_softback(vc, p, lines);
|
|
|
|
|
fbcon_cursor(vc, CM_DRAW | CM_SOFTBACK);
|
|
|
|
|
return 0;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if (!scrollback_phys_max)
|
|
|
|
|
return -ENOSYS;
|
|
|
|
|
|
|
|
|
|
scrollback_old = scrollback_current;
|
|
|
|
|
scrollback_current -= lines;
|
|
|
|
|
if (scrollback_current < 0)
|
|
|
|
|
scrollback_current = 0;
|
|
|
|
|
else if (scrollback_current > scrollback_max)
|
|
|
|
|
scrollback_current = scrollback_max;
|
|
|
|
|
if (scrollback_current == scrollback_old)
|
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
|
|
if (fbcon_is_inactive(vc, info))
|
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
|
|
fbcon_cursor(vc, CM_ERASE);
|
|
|
|
|
|
|
|
|
|
offset = p->yscroll - scrollback_current;
|
|
|
|
|
limit = p->vrows;
|
|
|
|
|
switch (p->scrollmode) {
|
|
|
|
|
case SCROLL_WRAP_MOVE:
|
|
|
|
|
info->var.vmode |= FB_VMODE_YWRAP;
|
|
|
|
|
break;
|
|
|
|
|
case SCROLL_PAN_MOVE:
|
|
|
|
|
case SCROLL_PAN_REDRAW:
|
|
|
|
|
limit -= vc->vc_rows;
|
|
|
|
|
info->var.vmode &= ~FB_VMODE_YWRAP;
|
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
if (offset < 0)
|
|
|
|
|
offset += limit;
|
|
|
|
|
else if (offset >= limit)
|
|
|
|
|
offset -= limit;
|
[PATCH] fbcon: Console Rotation - Prepare fbcon for console rotation
This patch series implements generic code to rotate the console at 90, 180,
and 270 degrees. The implementation is completely done in the framebuffer
console level, thus no changes to the framebuffer layer or to the drivers
are needed.
Console rotation is required by some Sharp-based devices where the natural
orientation of the display is not at 0 degrees. Also, users that have
displays that can pivot will benefit by having a console in portrait mode
if they so desire.
The choice to implement the code in the console layer rather than in the
framebuffer layer is due to the following reasons:
- it's fast
- it does not require driver changes
- it can coexist with devices that can rotate the display at the hardware level
- it complements graphics applications that can do display rotation
The changes to core fbcon are minimal-- recognition of the console
rotation angle so it can swap directions, origins and axes (xres vs yres,
xpanstep vs ypanstep, xoffset vs yoffset, etc) and storage of the rotation
angle per display. The bulk of the code that does the actual drawing to the
screen are placed in separate files. Each angle of rotation has separate
methods (bmove, clear, putcs, cursor, update_start which is derived from
update_var, and clear_margins). To mimimize processing time, the fontdata
are pre-rotated at each console switch (only if the font or the angle has
changed).
The option can be compiled out (CONFIG_FRAMEBUFFER_CONSOLE_ROTATION = n) if
rotation is not needed.
Choosing the rotation angle can be done in several ways:
1. boot option fbcon=rotate:n, where
n = 0 - normal
n = 1 - 90 degrees (clockwise)
n = 2 - 180 degrees (upside down)
n = 3 - 270 degrees (counterclockwise)
2. echo n > /sys/class/graphics/fb[num]/con_rotate
where n is the same as described above. It sets the angle of rotation
of the current console
3 echo n > /sys/class/graphics/fb[num]/con_rotate_all
where n is the same as described above. Globally sets the angle of
rotation.
GOTCHAS:
The option, especially at angles of 90 and 270 degrees, will exercise
the least used code of drivers. Namely, at these angles, panning is done
in the x-axis, so it can reveal bugs in the driver if xpanstep is set
incorrectly. A workaround is to set xpanstep = 0.
Secondly, at these angles, the framebuffer memory access can be
unaligned if (fontheight * bpp) % 32 ~= 0 which can reveal bugs in the drivers
imageblit, fillrect and copyarea functions. (I think cfbfillrect may have
this buglet). A workaround is to use a standard 8x16 font.
Speed:
The scrolling speed difference between 0 and 180 degrees is minimal,
somewhere areound 1-2%. At 90 or 270 degress, speed drops down to a vicinity
of 30-40%. This is understandable because the blit direction is across the
framebuffer "direction." Scrolling will be helped at these angles if xpanstep
is not equal to zero, use of 8x16 fonts, and setting xres_virtual >= xres * 2.
Note: The code is tested on little-endian only, so I don't know if it will
work in big-endian. Please let me know, it will take only less than a minute
of your time.
This patch prepares fbcon for console rotation and contains the following
changes:
- add rotate field in struct fbcon_ops to keep fbcon's current rotation
angle
- add con_rotate field in struct display to store per-display rotation angle
- create a private copy of the current var to fbcon. This will prevent
fbcon from directly manipulating info->var, especially the fields xoffset,
yoffset and vmode.
- add ability to swap pertinent axes (xres, yres; xpanstep, ypanstep; etc)
depending on the rotation angle
- change global update_var() (function that sets the screen start address)
as an fbcon method update_start. This is required because the axes, start
offset, and/or direction can be reversed depending on the rotation angle.
- add fbcon method rotate_font() which will rotate each character bitmap to
the correct angle of rotation.
- add fbcon boot option 'rotate' to select the angle of rotation at bootime.
Currently does nothing until all patches are applied.
Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-11-09 12:39:09 +07:00
|
|
|
|
|
|
|
|
ops->var.xoffset = 0;
|
|
|
|
|
ops->var.yoffset = offset * vc->vc_font.height;
|
|
|
|
|
ops->update_start(info);
|
|
|
|
|
|
2005-04-17 05:20:36 +07:00
|
|
|
if (!scrollback_current)
|
|
|
|
|
fbcon_cursor(vc, CM_DRAW);
|
|
|
|
|
return 0;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static int fbcon_set_origin(struct vc_data *vc)
|
|
|
|
|
{
|
|
|
|
|
if (softback_lines)
|
|
|
|
|
fbcon_scrolldelta(vc, softback_lines);
|
|
|
|
|
return 0;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static void fbcon_suspended(struct fb_info *info)
|
|
|
|
|
{
|
|
|
|
|
struct vc_data *vc = NULL;
|
|
|
|
|
struct fbcon_ops *ops = info->fbcon_par;
|
|
|
|
|
|
|
|
|
|
if (!ops || ops->currcon < 0)
|
|
|
|
|
return;
|
|
|
|
|
vc = vc_cons[ops->currcon].d;
|
|
|
|
|
|
|
|
|
|
/* Clear cursor, restore saved data */
|
|
|
|
|
fbcon_cursor(vc, CM_ERASE);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static void fbcon_resumed(struct fb_info *info)
|
|
|
|
|
{
|
|
|
|
|
struct vc_data *vc;
|
|
|
|
|
struct fbcon_ops *ops = info->fbcon_par;
|
|
|
|
|
|
|
|
|
|
if (!ops || ops->currcon < 0)
|
|
|
|
|
return;
|
|
|
|
|
vc = vc_cons[ops->currcon].d;
|
|
|
|
|
|
|
|
|
|
update_screen(vc);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static void fbcon_modechanged(struct fb_info *info)
|
|
|
|
|
{
|
|
|
|
|
struct fbcon_ops *ops = info->fbcon_par;
|
|
|
|
|
struct vc_data *vc;
|
|
|
|
|
struct display *p;
|
|
|
|
|
int rows, cols;
|
|
|
|
|
|
|
|
|
|
if (!ops || ops->currcon < 0)
|
|
|
|
|
return;
|
|
|
|
|
vc = vc_cons[ops->currcon].d;
|
[PATCH] fbcon: Console Rotation - Prepare fbcon for console rotation
This patch series implements generic code to rotate the console at 90, 180,
and 270 degrees. The implementation is completely done in the framebuffer
console level, thus no changes to the framebuffer layer or to the drivers
are needed.
Console rotation is required by some Sharp-based devices where the natural
orientation of the display is not at 0 degrees. Also, users that have
displays that can pivot will benefit by having a console in portrait mode
if they so desire.
The choice to implement the code in the console layer rather than in the
framebuffer layer is due to the following reasons:
- it's fast
- it does not require driver changes
- it can coexist with devices that can rotate the display at the hardware level
- it complements graphics applications that can do display rotation
The changes to core fbcon are minimal-- recognition of the console
rotation angle so it can swap directions, origins and axes (xres vs yres,
xpanstep vs ypanstep, xoffset vs yoffset, etc) and storage of the rotation
angle per display. The bulk of the code that does the actual drawing to the
screen are placed in separate files. Each angle of rotation has separate
methods (bmove, clear, putcs, cursor, update_start which is derived from
update_var, and clear_margins). To mimimize processing time, the fontdata
are pre-rotated at each console switch (only if the font or the angle has
changed).
The option can be compiled out (CONFIG_FRAMEBUFFER_CONSOLE_ROTATION = n) if
rotation is not needed.
Choosing the rotation angle can be done in several ways:
1. boot option fbcon=rotate:n, where
n = 0 - normal
n = 1 - 90 degrees (clockwise)
n = 2 - 180 degrees (upside down)
n = 3 - 270 degrees (counterclockwise)
2. echo n > /sys/class/graphics/fb[num]/con_rotate
where n is the same as described above. It sets the angle of rotation
of the current console
3 echo n > /sys/class/graphics/fb[num]/con_rotate_all
where n is the same as described above. Globally sets the angle of
rotation.
GOTCHAS:
The option, especially at angles of 90 and 270 degrees, will exercise
the least used code of drivers. Namely, at these angles, panning is done
in the x-axis, so it can reveal bugs in the driver if xpanstep is set
incorrectly. A workaround is to set xpanstep = 0.
Secondly, at these angles, the framebuffer memory access can be
unaligned if (fontheight * bpp) % 32 ~= 0 which can reveal bugs in the drivers
imageblit, fillrect and copyarea functions. (I think cfbfillrect may have
this buglet). A workaround is to use a standard 8x16 font.
Speed:
The scrolling speed difference between 0 and 180 degrees is minimal,
somewhere areound 1-2%. At 90 or 270 degress, speed drops down to a vicinity
of 30-40%. This is understandable because the blit direction is across the
framebuffer "direction." Scrolling will be helped at these angles if xpanstep
is not equal to zero, use of 8x16 fonts, and setting xres_virtual >= xres * 2.
Note: The code is tested on little-endian only, so I don't know if it will
work in big-endian. Please let me know, it will take only less than a minute
of your time.
This patch prepares fbcon for console rotation and contains the following
changes:
- add rotate field in struct fbcon_ops to keep fbcon's current rotation
angle
- add con_rotate field in struct display to store per-display rotation angle
- create a private copy of the current var to fbcon. This will prevent
fbcon from directly manipulating info->var, especially the fields xoffset,
yoffset and vmode.
- add ability to swap pertinent axes (xres, yres; xpanstep, ypanstep; etc)
depending on the rotation angle
- change global update_var() (function that sets the screen start address)
as an fbcon method update_start. This is required because the axes, start
offset, and/or direction can be reversed depending on the rotation angle.
- add fbcon method rotate_font() which will rotate each character bitmap to
the correct angle of rotation.
- add fbcon boot option 'rotate' to select the angle of rotation at bootime.
Currently does nothing until all patches are applied.
Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-11-09 12:39:09 +07:00
|
|
|
if (vc->vc_mode != KD_TEXT ||
|
|
|
|
|
registered_fb[con2fb_map[ops->currcon]] != info)
|
2005-04-17 05:20:36 +07:00
|
|
|
return;
|
|
|
|
|
|
|
|
|
|
p = &fb_display[vc->vc_num];
|
[PATCH] fbcon: Console Rotation - Prepare fbcon for console rotation
This patch series implements generic code to rotate the console at 90, 180,
and 270 degrees. The implementation is completely done in the framebuffer
console level, thus no changes to the framebuffer layer or to the drivers
are needed.
Console rotation is required by some Sharp-based devices where the natural
orientation of the display is not at 0 degrees. Also, users that have
displays that can pivot will benefit by having a console in portrait mode
if they so desire.
The choice to implement the code in the console layer rather than in the
framebuffer layer is due to the following reasons:
- it's fast
- it does not require driver changes
- it can coexist with devices that can rotate the display at the hardware level
- it complements graphics applications that can do display rotation
The changes to core fbcon are minimal-- recognition of the console
rotation angle so it can swap directions, origins and axes (xres vs yres,
xpanstep vs ypanstep, xoffset vs yoffset, etc) and storage of the rotation
angle per display. The bulk of the code that does the actual drawing to the
screen are placed in separate files. Each angle of rotation has separate
methods (bmove, clear, putcs, cursor, update_start which is derived from
update_var, and clear_margins). To mimimize processing time, the fontdata
are pre-rotated at each console switch (only if the font or the angle has
changed).
The option can be compiled out (CONFIG_FRAMEBUFFER_CONSOLE_ROTATION = n) if
rotation is not needed.
Choosing the rotation angle can be done in several ways:
1. boot option fbcon=rotate:n, where
n = 0 - normal
n = 1 - 90 degrees (clockwise)
n = 2 - 180 degrees (upside down)
n = 3 - 270 degrees (counterclockwise)
2. echo n > /sys/class/graphics/fb[num]/con_rotate
where n is the same as described above. It sets the angle of rotation
of the current console
3 echo n > /sys/class/graphics/fb[num]/con_rotate_all
where n is the same as described above. Globally sets the angle of
rotation.
GOTCHAS:
The option, especially at angles of 90 and 270 degrees, will exercise
the least used code of drivers. Namely, at these angles, panning is done
in the x-axis, so it can reveal bugs in the driver if xpanstep is set
incorrectly. A workaround is to set xpanstep = 0.
Secondly, at these angles, the framebuffer memory access can be
unaligned if (fontheight * bpp) % 32 ~= 0 which can reveal bugs in the drivers
imageblit, fillrect and copyarea functions. (I think cfbfillrect may have
this buglet). A workaround is to use a standard 8x16 font.
Speed:
The scrolling speed difference between 0 and 180 degrees is minimal,
somewhere areound 1-2%. At 90 or 270 degress, speed drops down to a vicinity
of 30-40%. This is understandable because the blit direction is across the
framebuffer "direction." Scrolling will be helped at these angles if xpanstep
is not equal to zero, use of 8x16 fonts, and setting xres_virtual >= xres * 2.
Note: The code is tested on little-endian only, so I don't know if it will
work in big-endian. Please let me know, it will take only less than a minute
of your time.
This patch prepares fbcon for console rotation and contains the following
changes:
- add rotate field in struct fbcon_ops to keep fbcon's current rotation
angle
- add con_rotate field in struct display to store per-display rotation angle
- create a private copy of the current var to fbcon. This will prevent
fbcon from directly manipulating info->var, especially the fields xoffset,
yoffset and vmode.
- add ability to swap pertinent axes (xres, yres; xpanstep, ypanstep; etc)
depending on the rotation angle
- change global update_var() (function that sets the screen start address)
as an fbcon method update_start. This is required because the axes, start
offset, and/or direction can be reversed depending on the rotation angle.
- add fbcon method rotate_font() which will rotate each character bitmap to
the correct angle of rotation.
- add fbcon boot option 'rotate' to select the angle of rotation at bootime.
Currently does nothing until all patches are applied.
Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-11-09 12:39:09 +07:00
|
|
|
set_blitting_type(vc, info, p);
|
2005-04-17 05:20:36 +07:00
|
|
|
|
|
|
|
|
if (CON_IS_VISIBLE(vc)) {
|
|
|
|
|
var_to_display(p, &info->var, info);
|
[PATCH] fbcon: Console Rotation - Prepare fbcon for console rotation
This patch series implements generic code to rotate the console at 90, 180,
and 270 degrees. The implementation is completely done in the framebuffer
console level, thus no changes to the framebuffer layer or to the drivers
are needed.
Console rotation is required by some Sharp-based devices where the natural
orientation of the display is not at 0 degrees. Also, users that have
displays that can pivot will benefit by having a console in portrait mode
if they so desire.
The choice to implement the code in the console layer rather than in the
framebuffer layer is due to the following reasons:
- it's fast
- it does not require driver changes
- it can coexist with devices that can rotate the display at the hardware level
- it complements graphics applications that can do display rotation
The changes to core fbcon are minimal-- recognition of the console
rotation angle so it can swap directions, origins and axes (xres vs yres,
xpanstep vs ypanstep, xoffset vs yoffset, etc) and storage of the rotation
angle per display. The bulk of the code that does the actual drawing to the
screen are placed in separate files. Each angle of rotation has separate
methods (bmove, clear, putcs, cursor, update_start which is derived from
update_var, and clear_margins). To mimimize processing time, the fontdata
are pre-rotated at each console switch (only if the font or the angle has
changed).
The option can be compiled out (CONFIG_FRAMEBUFFER_CONSOLE_ROTATION = n) if
rotation is not needed.
Choosing the rotation angle can be done in several ways:
1. boot option fbcon=rotate:n, where
n = 0 - normal
n = 1 - 90 degrees (clockwise)
n = 2 - 180 degrees (upside down)
n = 3 - 270 degrees (counterclockwise)
2. echo n > /sys/class/graphics/fb[num]/con_rotate
where n is the same as described above. It sets the angle of rotation
of the current console
3 echo n > /sys/class/graphics/fb[num]/con_rotate_all
where n is the same as described above. Globally sets the angle of
rotation.
GOTCHAS:
The option, especially at angles of 90 and 270 degrees, will exercise
the least used code of drivers. Namely, at these angles, panning is done
in the x-axis, so it can reveal bugs in the driver if xpanstep is set
incorrectly. A workaround is to set xpanstep = 0.
Secondly, at these angles, the framebuffer memory access can be
unaligned if (fontheight * bpp) % 32 ~= 0 which can reveal bugs in the drivers
imageblit, fillrect and copyarea functions. (I think cfbfillrect may have
this buglet). A workaround is to use a standard 8x16 font.
Speed:
The scrolling speed difference between 0 and 180 degrees is minimal,
somewhere areound 1-2%. At 90 or 270 degress, speed drops down to a vicinity
of 30-40%. This is understandable because the blit direction is across the
framebuffer "direction." Scrolling will be helped at these angles if xpanstep
is not equal to zero, use of 8x16 fonts, and setting xres_virtual >= xres * 2.
Note: The code is tested on little-endian only, so I don't know if it will
work in big-endian. Please let me know, it will take only less than a minute
of your time.
This patch prepares fbcon for console rotation and contains the following
changes:
- add rotate field in struct fbcon_ops to keep fbcon's current rotation
angle
- add con_rotate field in struct display to store per-display rotation angle
- create a private copy of the current var to fbcon. This will prevent
fbcon from directly manipulating info->var, especially the fields xoffset,
yoffset and vmode.
- add ability to swap pertinent axes (xres, yres; xpanstep, ypanstep; etc)
depending on the rotation angle
- change global update_var() (function that sets the screen start address)
as an fbcon method update_start. This is required because the axes, start
offset, and/or direction can be reversed depending on the rotation angle.
- add fbcon method rotate_font() which will rotate each character bitmap to
the correct angle of rotation.
- add fbcon boot option 'rotate' to select the angle of rotation at bootime.
Currently does nothing until all patches are applied.
Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-11-09 12:39:09 +07:00
|
|
|
cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
|
|
|
|
|
rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
|
|
|
|
|
cols /= vc->vc_font.width;
|
|
|
|
|
rows /= vc->vc_font.height;
|
2005-04-17 05:20:36 +07:00
|
|
|
vc_resize(vc, cols, rows);
|
|
|
|
|
updatescrollmode(p, info, vc);
|
|
|
|
|
scrollback_max = 0;
|
|
|
|
|
scrollback_current = 0;
|
[PATCH] fbcon: Console Rotation - Prepare fbcon for console rotation
This patch series implements generic code to rotate the console at 90, 180,
and 270 degrees. The implementation is completely done in the framebuffer
console level, thus no changes to the framebuffer layer or to the drivers
are needed.
Console rotation is required by some Sharp-based devices where the natural
orientation of the display is not at 0 degrees. Also, users that have
displays that can pivot will benefit by having a console in portrait mode
if they so desire.
The choice to implement the code in the console layer rather than in the
framebuffer layer is due to the following reasons:
- it's fast
- it does not require driver changes
- it can coexist with devices that can rotate the display at the hardware level
- it complements graphics applications that can do display rotation
The changes to core fbcon are minimal-- recognition of the console
rotation angle so it can swap directions, origins and axes (xres vs yres,
xpanstep vs ypanstep, xoffset vs yoffset, etc) and storage of the rotation
angle per display. The bulk of the code that does the actual drawing to the
screen are placed in separate files. Each angle of rotation has separate
methods (bmove, clear, putcs, cursor, update_start which is derived from
update_var, and clear_margins). To mimimize processing time, the fontdata
are pre-rotated at each console switch (only if the font or the angle has
changed).
The option can be compiled out (CONFIG_FRAMEBUFFER_CONSOLE_ROTATION = n) if
rotation is not needed.
Choosing the rotation angle can be done in several ways:
1. boot option fbcon=rotate:n, where
n = 0 - normal
n = 1 - 90 degrees (clockwise)
n = 2 - 180 degrees (upside down)
n = 3 - 270 degrees (counterclockwise)
2. echo n > /sys/class/graphics/fb[num]/con_rotate
where n is the same as described above. It sets the angle of rotation
of the current console
3 echo n > /sys/class/graphics/fb[num]/con_rotate_all
where n is the same as described above. Globally sets the angle of
rotation.
GOTCHAS:
The option, especially at angles of 90 and 270 degrees, will exercise
the least used code of drivers. Namely, at these angles, panning is done
in the x-axis, so it can reveal bugs in the driver if xpanstep is set
incorrectly. A workaround is to set xpanstep = 0.
Secondly, at these angles, the framebuffer memory access can be
unaligned if (fontheight * bpp) % 32 ~= 0 which can reveal bugs in the drivers
imageblit, fillrect and copyarea functions. (I think cfbfillrect may have
this buglet). A workaround is to use a standard 8x16 font.
Speed:
The scrolling speed difference between 0 and 180 degrees is minimal,
somewhere areound 1-2%. At 90 or 270 degress, speed drops down to a vicinity
of 30-40%. This is understandable because the blit direction is across the
framebuffer "direction." Scrolling will be helped at these angles if xpanstep
is not equal to zero, use of 8x16 fonts, and setting xres_virtual >= xres * 2.
Note: The code is tested on little-endian only, so I don't know if it will
work in big-endian. Please let me know, it will take only less than a minute
of your time.
This patch prepares fbcon for console rotation and contains the following
changes:
- add rotate field in struct fbcon_ops to keep fbcon's current rotation
angle
- add con_rotate field in struct display to store per-display rotation angle
- create a private copy of the current var to fbcon. This will prevent
fbcon from directly manipulating info->var, especially the fields xoffset,
yoffset and vmode.
- add ability to swap pertinent axes (xres, yres; xpanstep, ypanstep; etc)
depending on the rotation angle
- change global update_var() (function that sets the screen start address)
as an fbcon method update_start. This is required because the axes, start
offset, and/or direction can be reversed depending on the rotation angle.
- add fbcon method rotate_font() which will rotate each character bitmap to
the correct angle of rotation.
- add fbcon boot option 'rotate' to select the angle of rotation at bootime.
Currently does nothing until all patches are applied.
Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-11-09 12:39:09 +07:00
|
|
|
ops->var.xoffset = ops->var.yoffset = p->yscroll = 0;
|
|
|
|
|
ops->update_start(info);
|
2005-04-17 05:20:36 +07:00
|
|
|
fbcon_set_palette(vc, color_table);
|
|
|
|
|
update_screen(vc);
|
2005-11-07 16:00:36 +07:00
|
|
|
if (softback_buf)
|
|
|
|
|
fbcon_update_softback(vc);
|
2005-04-17 05:20:36 +07:00
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
2005-09-10 03:04:29 +07:00
|
|
|
static void fbcon_set_all_vcs(struct fb_info *info)
|
|
|
|
|
{
|
|
|
|
|
struct fbcon_ops *ops = info->fbcon_par;
|
|
|
|
|
struct vc_data *vc;
|
|
|
|
|
struct display *p;
|
|
|
|
|
int i, rows, cols;
|
|
|
|
|
|
|
|
|
|
if (!ops || ops->currcon < 0)
|
|
|
|
|
return;
|
|
|
|
|
|
|
|
|
|
for (i = 0; i < MAX_NR_CONSOLES; i++) {
|
|
|
|
|
vc = vc_cons[i].d;
|
|
|
|
|
if (!vc || vc->vc_mode != KD_TEXT ||
|
|
|
|
|
registered_fb[con2fb_map[i]] != info)
|
|
|
|
|
continue;
|
|
|
|
|
|
|
|
|
|
p = &fb_display[vc->vc_num];
|
[PATCH] fbcon: Console Rotation - Prepare fbcon for console rotation
This patch series implements generic code to rotate the console at 90, 180,
and 270 degrees. The implementation is completely done in the framebuffer
console level, thus no changes to the framebuffer layer or to the drivers
are needed.
Console rotation is required by some Sharp-based devices where the natural
orientation of the display is not at 0 degrees. Also, users that have
displays that can pivot will benefit by having a console in portrait mode
if they so desire.
The choice to implement the code in the console layer rather than in the
framebuffer layer is due to the following reasons:
- it's fast
- it does not require driver changes
- it can coexist with devices that can rotate the display at the hardware level
- it complements graphics applications that can do display rotation
The changes to core fbcon are minimal-- recognition of the console
rotation angle so it can swap directions, origins and axes (xres vs yres,
xpanstep vs ypanstep, xoffset vs yoffset, etc) and storage of the rotation
angle per display. The bulk of the code that does the actual drawing to the
screen are placed in separate files. Each angle of rotation has separate
methods (bmove, clear, putcs, cursor, update_start which is derived from
update_var, and clear_margins). To mimimize processing time, the fontdata
are pre-rotated at each console switch (only if the font or the angle has
changed).
The option can be compiled out (CONFIG_FRAMEBUFFER_CONSOLE_ROTATION = n) if
rotation is not needed.
Choosing the rotation angle can be done in several ways:
1. boot option fbcon=rotate:n, where
n = 0 - normal
n = 1 - 90 degrees (clockwise)
n = 2 - 180 degrees (upside down)
n = 3 - 270 degrees (counterclockwise)
2. echo n > /sys/class/graphics/fb[num]/con_rotate
where n is the same as described above. It sets the angle of rotation
of the current console
3 echo n > /sys/class/graphics/fb[num]/con_rotate_all
where n is the same as described above. Globally sets the angle of
rotation.
GOTCHAS:
The option, especially at angles of 90 and 270 degrees, will exercise
the least used code of drivers. Namely, at these angles, panning is done
in the x-axis, so it can reveal bugs in the driver if xpanstep is set
incorrectly. A workaround is to set xpanstep = 0.
Secondly, at these angles, the framebuffer memory access can be
unaligned if (fontheight * bpp) % 32 ~= 0 which can reveal bugs in the drivers
imageblit, fillrect and copyarea functions. (I think cfbfillrect may have
this buglet). A workaround is to use a standard 8x16 font.
Speed:
The scrolling speed difference between 0 and 180 degrees is minimal,
somewhere areound 1-2%. At 90 or 270 degress, speed drops down to a vicinity
of 30-40%. This is understandable because the blit direction is across the
framebuffer "direction." Scrolling will be helped at these angles if xpanstep
is not equal to zero, use of 8x16 fonts, and setting xres_virtual >= xres * 2.
Note: The code is tested on little-endian only, so I don't know if it will
work in big-endian. Please let me know, it will take only less than a minute
of your time.
This patch prepares fbcon for console rotation and contains the following
changes:
- add rotate field in struct fbcon_ops to keep fbcon's current rotation
angle
- add con_rotate field in struct display to store per-display rotation angle
- create a private copy of the current var to fbcon. This will prevent
fbcon from directly manipulating info->var, especially the fields xoffset,
yoffset and vmode.
- add ability to swap pertinent axes (xres, yres; xpanstep, ypanstep; etc)
depending on the rotation angle
- change global update_var() (function that sets the screen start address)
as an fbcon method update_start. This is required because the axes, start
offset, and/or direction can be reversed depending on the rotation angle.
- add fbcon method rotate_font() which will rotate each character bitmap to
the correct angle of rotation.
- add fbcon boot option 'rotate' to select the angle of rotation at bootime.
Currently does nothing until all patches are applied.
Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-11-09 12:39:09 +07:00
|
|
|
set_blitting_type(vc, info, p);
|
2005-09-10 03:04:29 +07:00
|
|
|
var_to_display(p, &info->var, info);
|
[PATCH] fbcon: Console Rotation - Prepare fbcon for console rotation
This patch series implements generic code to rotate the console at 90, 180,
and 270 degrees. The implementation is completely done in the framebuffer
console level, thus no changes to the framebuffer layer or to the drivers
are needed.
Console rotation is required by some Sharp-based devices where the natural
orientation of the display is not at 0 degrees. Also, users that have
displays that can pivot will benefit by having a console in portrait mode
if they so desire.
The choice to implement the code in the console layer rather than in the
framebuffer layer is due to the following reasons:
- it's fast
- it does not require driver changes
- it can coexist with devices that can rotate the display at the hardware level
- it complements graphics applications that can do display rotation
The changes to core fbcon are minimal-- recognition of the console
rotation angle so it can swap directions, origins and axes (xres vs yres,
xpanstep vs ypanstep, xoffset vs yoffset, etc) and storage of the rotation
angle per display. The bulk of the code that does the actual drawing to the
screen are placed in separate files. Each angle of rotation has separate
methods (bmove, clear, putcs, cursor, update_start which is derived from
update_var, and clear_margins). To mimimize processing time, the fontdata
are pre-rotated at each console switch (only if the font or the angle has
changed).
The option can be compiled out (CONFIG_FRAMEBUFFER_CONSOLE_ROTATION = n) if
rotation is not needed.
Choosing the rotation angle can be done in several ways:
1. boot option fbcon=rotate:n, where
n = 0 - normal
n = 1 - 90 degrees (clockwise)
n = 2 - 180 degrees (upside down)
n = 3 - 270 degrees (counterclockwise)
2. echo n > /sys/class/graphics/fb[num]/con_rotate
where n is the same as described above. It sets the angle of rotation
of the current console
3 echo n > /sys/class/graphics/fb[num]/con_rotate_all
where n is the same as described above. Globally sets the angle of
rotation.
GOTCHAS:
The option, especially at angles of 90 and 270 degrees, will exercise
the least used code of drivers. Namely, at these angles, panning is done
in the x-axis, so it can reveal bugs in the driver if xpanstep is set
incorrectly. A workaround is to set xpanstep = 0.
Secondly, at these angles, the framebuffer memory access can be
unaligned if (fontheight * bpp) % 32 ~= 0 which can reveal bugs in the drivers
imageblit, fillrect and copyarea functions. (I think cfbfillrect may have
this buglet). A workaround is to use a standard 8x16 font.
Speed:
The scrolling speed difference between 0 and 180 degrees is minimal,
somewhere areound 1-2%. At 90 or 270 degress, speed drops down to a vicinity
of 30-40%. This is understandable because the blit direction is across the
framebuffer "direction." Scrolling will be helped at these angles if xpanstep
is not equal to zero, use of 8x16 fonts, and setting xres_virtual >= xres * 2.
Note: The code is tested on little-endian only, so I don't know if it will
work in big-endian. Please let me know, it will take only less than a minute
of your time.
This patch prepares fbcon for console rotation and contains the following
changes:
- add rotate field in struct fbcon_ops to keep fbcon's current rotation
angle
- add con_rotate field in struct display to store per-display rotation angle
- create a private copy of the current var to fbcon. This will prevent
fbcon from directly manipulating info->var, especially the fields xoffset,
yoffset and vmode.
- add ability to swap pertinent axes (xres, yres; xpanstep, ypanstep; etc)
depending on the rotation angle
- change global update_var() (function that sets the screen start address)
as an fbcon method update_start. This is required because the axes, start
offset, and/or direction can be reversed depending on the rotation angle.
- add fbcon method rotate_font() which will rotate each character bitmap to
the correct angle of rotation.
- add fbcon boot option 'rotate' to select the angle of rotation at bootime.
Currently does nothing until all patches are applied.
Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-11-09 12:39:09 +07:00
|
|
|
cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
|
|
|
|
|
rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
|
|
|
|
|
cols /= vc->vc_font.width;
|
|
|
|
|
rows /= vc->vc_font.height;
|
2005-09-10 03:04:29 +07:00
|
|
|
vc_resize(vc, cols, rows);
|
|
|
|
|
|
|
|
|
|
if (CON_IS_VISIBLE(vc)) {
|
|
|
|
|
updatescrollmode(p, info, vc);
|
|
|
|
|
scrollback_max = 0;
|
|
|
|
|
scrollback_current = 0;
|
[PATCH] fbcon: Console Rotation - Prepare fbcon for console rotation
This patch series implements generic code to rotate the console at 90, 180,
and 270 degrees. The implementation is completely done in the framebuffer
console level, thus no changes to the framebuffer layer or to the drivers
are needed.
Console rotation is required by some Sharp-based devices where the natural
orientation of the display is not at 0 degrees. Also, users that have
displays that can pivot will benefit by having a console in portrait mode
if they so desire.
The choice to implement the code in the console layer rather than in the
framebuffer layer is due to the following reasons:
- it's fast
- it does not require driver changes
- it can coexist with devices that can rotate the display at the hardware level
- it complements graphics applications that can do display rotation
The changes to core fbcon are minimal-- recognition of the console
rotation angle so it can swap directions, origins and axes (xres vs yres,
xpanstep vs ypanstep, xoffset vs yoffset, etc) and storage of the rotation
angle per display. The bulk of the code that does the actual drawing to the
screen are placed in separate files. Each angle of rotation has separate
methods (bmove, clear, putcs, cursor, update_start which is derived from
update_var, and clear_margins). To mimimize processing time, the fontdata
are pre-rotated at each console switch (only if the font or the angle has
changed).
The option can be compiled out (CONFIG_FRAMEBUFFER_CONSOLE_ROTATION = n) if
rotation is not needed.
Choosing the rotation angle can be done in several ways:
1. boot option fbcon=rotate:n, where
n = 0 - normal
n = 1 - 90 degrees (clockwise)
n = 2 - 180 degrees (upside down)
n = 3 - 270 degrees (counterclockwise)
2. echo n > /sys/class/graphics/fb[num]/con_rotate
where n is the same as described above. It sets the angle of rotation
of the current console
3 echo n > /sys/class/graphics/fb[num]/con_rotate_all
where n is the same as described above. Globally sets the angle of
rotation.
GOTCHAS:
The option, especially at angles of 90 and 270 degrees, will exercise
the least used code of drivers. Namely, at these angles, panning is done
in the x-axis, so it can reveal bugs in the driver if xpanstep is set
incorrectly. A workaround is to set xpanstep = 0.
Secondly, at these angles, the framebuffer memory access can be
unaligned if (fontheight * bpp) % 32 ~= 0 which can reveal bugs in the drivers
imageblit, fillrect and copyarea functions. (I think cfbfillrect may have
this buglet). A workaround is to use a standard 8x16 font.
Speed:
The scrolling speed difference between 0 and 180 degrees is minimal,
somewhere areound 1-2%. At 90 or 270 degress, speed drops down to a vicinity
of 30-40%. This is understandable because the blit direction is across the
framebuffer "direction." Scrolling will be helped at these angles if xpanstep
is not equal to zero, use of 8x16 fonts, and setting xres_virtual >= xres * 2.
Note: The code is tested on little-endian only, so I don't know if it will
work in big-endian. Please let me know, it will take only less than a minute
of your time.
This patch prepares fbcon for console rotation and contains the following
changes:
- add rotate field in struct fbcon_ops to keep fbcon's current rotation
angle
- add con_rotate field in struct display to store per-display rotation angle
- create a private copy of the current var to fbcon. This will prevent
fbcon from directly manipulating info->var, especially the fields xoffset,
yoffset and vmode.
- add ability to swap pertinent axes (xres, yres; xpanstep, ypanstep; etc)
depending on the rotation angle
- change global update_var() (function that sets the screen start address)
as an fbcon method update_start. This is required because the axes, start
offset, and/or direction can be reversed depending on the rotation angle.
- add fbcon method rotate_font() which will rotate each character bitmap to
the correct angle of rotation.
- add fbcon boot option 'rotate' to select the angle of rotation at bootime.
Currently does nothing until all patches are applied.
Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-11-09 12:39:09 +07:00
|
|
|
ops->var.xoffset = ops->var.yoffset = p->yscroll = 0;
|
|
|
|
|
ops->update_start(info);
|
2005-09-10 03:04:29 +07:00
|
|
|
fbcon_set_palette(vc, color_table);
|
|
|
|
|
update_screen(vc);
|
2005-11-07 16:00:36 +07:00
|
|
|
if (softback_buf)
|
|
|
|
|
fbcon_update_softback(vc);
|
2005-09-10 03:04:29 +07:00
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
2005-04-17 05:20:36 +07:00
|
|
|
static int fbcon_mode_deleted(struct fb_info *info,
|
|
|
|
|
struct fb_videomode *mode)
|
|
|
|
|
{
|
|
|
|
|
struct fb_info *fb_info;
|
|
|
|
|
struct display *p;
|
|
|
|
|
int i, j, found = 0;
|
|
|
|
|
|
|
|
|
|
/* before deletion, ensure that mode is not in use */
|
|
|
|
|
for (i = first_fb_vc; i <= last_fb_vc; i++) {
|
|
|
|
|
j = con2fb_map[i];
|
|
|
|
|
if (j == -1)
|
|
|
|
|
continue;
|
|
|
|
|
fb_info = registered_fb[j];
|
|
|
|
|
if (fb_info != info)
|
|
|
|
|
continue;
|
|
|
|
|
p = &fb_display[i];
|
|
|
|
|
if (!p || !p->mode)
|
|
|
|
|
continue;
|
|
|
|
|
if (fb_mode_is_equal(p->mode, mode)) {
|
|
|
|
|
found = 1;
|
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
return found;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static int fbcon_fb_registered(int idx)
|
|
|
|
|
{
|
|
|
|
|
int ret = 0, i;
|
|
|
|
|
|
|
|
|
|
if (info_idx == -1) {
|
|
|
|
|
for (i = 0; i < MAX_NR_CONSOLES; i++) {
|
|
|
|
|
if (con2fb_map_boot[i] == idx) {
|
|
|
|
|
info_idx = idx;
|
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
if (info_idx != -1)
|
|
|
|
|
ret = fbcon_takeover(1);
|
|
|
|
|
} else {
|
|
|
|
|
for (i = 0; i < MAX_NR_CONSOLES; i++) {
|
|
|
|
|
if (con2fb_map_boot[i] == idx)
|
|
|
|
|
set_con2fb_map(i, idx, 0);
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
return ret;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static void fbcon_fb_blanked(struct fb_info *info, int blank)
|
|
|
|
|
{
|
|
|
|
|
struct fbcon_ops *ops = info->fbcon_par;
|
|
|
|
|
struct vc_data *vc;
|
|
|
|
|
|
|
|
|
|
if (!ops || ops->currcon < 0)
|
|
|
|
|
return;
|
|
|
|
|
|
|
|
|
|
vc = vc_cons[ops->currcon].d;
|
|
|
|
|
if (vc->vc_mode != KD_TEXT ||
|
|
|
|
|
registered_fb[con2fb_map[ops->currcon]] != info)
|
|
|
|
|
return;
|
|
|
|
|
|
|
|
|
|
if (CON_IS_VISIBLE(vc)) {
|
|
|
|
|
if (blank)
|
|
|
|
|
do_blank_screen(0);
|
|
|
|
|
else
|
|
|
|
|
do_unblank_screen(0);
|
|
|
|
|
}
|
|
|
|
|
ops->blank_state = blank;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static void fbcon_new_modelist(struct fb_info *info)
|
|
|
|
|
{
|
|
|
|
|
int i;
|
|
|
|
|
struct vc_data *vc;
|
|
|
|
|
struct fb_var_screeninfo var;
|
|
|
|
|
struct fb_videomode *mode;
|
|
|
|
|
|
|
|
|
|
for (i = 0; i < MAX_NR_CONSOLES; i++) {
|
|
|
|
|
if (registered_fb[con2fb_map[i]] != info)
|
|
|
|
|
continue;
|
|
|
|
|
if (!fb_display[i].mode)
|
|
|
|
|
continue;
|
|
|
|
|
vc = vc_cons[i].d;
|
|
|
|
|
display_to_var(&var, &fb_display[i]);
|
2005-11-07 16:00:47 +07:00
|
|
|
mode = fb_find_nearest_mode(fb_display[i].mode,
|
|
|
|
|
&info->modelist);
|
2005-04-17 05:20:36 +07:00
|
|
|
fb_videomode_to_var(&var, mode);
|
|
|
|
|
|
|
|
|
|
if (vc)
|
|
|
|
|
fbcon_set_disp(info, &var, vc);
|
|
|
|
|
else
|
|
|
|
|
fbcon_preset_disp(info, &var, i);
|
|
|
|
|
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static int fbcon_event_notify(struct notifier_block *self,
|
|
|
|
|
unsigned long action, void *data)
|
|
|
|
|
{
|
|
|
|
|
struct fb_event *event = data;
|
|
|
|
|
struct fb_info *info = event->info;
|
|
|
|
|
struct fb_videomode *mode;
|
|
|
|
|
struct fb_con2fbmap *con2fb;
|
|
|
|
|
int ret = 0;
|
|
|
|
|
|
|
|
|
|
switch(action) {
|
|
|
|
|
case FB_EVENT_SUSPEND:
|
|
|
|
|
fbcon_suspended(info);
|
|
|
|
|
break;
|
|
|
|
|
case FB_EVENT_RESUME:
|
|
|
|
|
fbcon_resumed(info);
|
|
|
|
|
break;
|
|
|
|
|
case FB_EVENT_MODE_CHANGE:
|
|
|
|
|
fbcon_modechanged(info);
|
|
|
|
|
break;
|
2005-09-10 03:04:29 +07:00
|
|
|
case FB_EVENT_MODE_CHANGE_ALL:
|
|
|
|
|
fbcon_set_all_vcs(info);
|
|
|
|
|
break;
|
2005-04-17 05:20:36 +07:00
|
|
|
case FB_EVENT_MODE_DELETE:
|
|
|
|
|
mode = event->data;
|
|
|
|
|
ret = fbcon_mode_deleted(info, mode);
|
|
|
|
|
break;
|
|
|
|
|
case FB_EVENT_FB_REGISTERED:
|
|
|
|
|
ret = fbcon_fb_registered(info->node);
|
|
|
|
|
break;
|
|
|
|
|
case FB_EVENT_SET_CONSOLE_MAP:
|
|
|
|
|
con2fb = event->data;
|
|
|
|
|
ret = set_con2fb_map(con2fb->console - 1,
|
|
|
|
|
con2fb->framebuffer, 1);
|
|
|
|
|
break;
|
|
|
|
|
case FB_EVENT_GET_CONSOLE_MAP:
|
|
|
|
|
con2fb = event->data;
|
|
|
|
|
con2fb->framebuffer = con2fb_map[con2fb->console - 1];
|
|
|
|
|
break;
|
|
|
|
|
case FB_EVENT_BLANK:
|
|
|
|
|
fbcon_fb_blanked(info, *(int *)event->data);
|
|
|
|
|
break;
|
|
|
|
|
case FB_EVENT_NEW_MODELIST:
|
|
|
|
|
fbcon_new_modelist(info);
|
|
|
|
|
break;
|
2005-11-09 12:39:15 +07:00
|
|
|
case FB_EVENT_SET_CON_ROTATE:
|
|
|
|
|
fbcon_rotate(info, *(int *)event->data);
|
|
|
|
|
break;
|
|
|
|
|
case FB_EVENT_GET_CON_ROTATE:
|
|
|
|
|
ret = fbcon_get_rotate(info);
|
|
|
|
|
break;
|
|
|
|
|
case FB_EVENT_SET_CON_ROTATE_ALL:
|
|
|
|
|
fbcon_rotate_all(info, *(int *)event->data);
|
2005-04-17 05:20:36 +07:00
|
|
|
}
|
|
|
|
|
|
|
|
|
|
return ret;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* The console `switch' structure for the frame buffer based console
|
|
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
static const struct consw fb_con = {
|
|
|
|
|
.owner = THIS_MODULE,
|
|
|
|
|
.con_startup = fbcon_startup,
|
|
|
|
|
.con_init = fbcon_init,
|
|
|
|
|
.con_deinit = fbcon_deinit,
|
|
|
|
|
.con_clear = fbcon_clear,
|
|
|
|
|
.con_putc = fbcon_putc,
|
|
|
|
|
.con_putcs = fbcon_putcs,
|
|
|
|
|
.con_cursor = fbcon_cursor,
|
|
|
|
|
.con_scroll = fbcon_scroll,
|
|
|
|
|
.con_bmove = fbcon_bmove,
|
|
|
|
|
.con_switch = fbcon_switch,
|
|
|
|
|
.con_blank = fbcon_blank,
|
|
|
|
|
.con_font_set = fbcon_set_font,
|
|
|
|
|
.con_font_get = fbcon_get_font,
|
|
|
|
|
.con_font_default = fbcon_set_def_font,
|
|
|
|
|
.con_font_copy = fbcon_copy_font,
|
|
|
|
|
.con_set_palette = fbcon_set_palette,
|
|
|
|
|
.con_scrolldelta = fbcon_scrolldelta,
|
|
|
|
|
.con_set_origin = fbcon_set_origin,
|
|
|
|
|
.con_invert_region = fbcon_invert_region,
|
|
|
|
|
.con_screen_pos = fbcon_screen_pos,
|
|
|
|
|
.con_getxy = fbcon_getxy,
|
|
|
|
|
.con_resize = fbcon_resize,
|
|
|
|
|
};
|
|
|
|
|
|
|
|
|
|
static struct notifier_block fbcon_event_notifier = {
|
|
|
|
|
.notifier_call = fbcon_event_notify,
|
|
|
|
|
};
|
|
|
|
|
|
|
|
|
|
static int __init fb_console_init(void)
|
|
|
|
|
{
|
|
|
|
|
int i;
|
|
|
|
|
|
|
|
|
|
acquire_console_sem();
|
|
|
|
|
fb_register_client(&fbcon_event_notifier);
|
|
|
|
|
release_console_sem();
|
|
|
|
|
|
|
|
|
|
for (i = 0; i < MAX_NR_CONSOLES; i++)
|
|
|
|
|
con2fb_map[i] = -1;
|
|
|
|
|
|
|
|
|
|
if (num_registered_fb) {
|
|
|
|
|
for (i = 0; i < FB_MAX; i++) {
|
|
|
|
|
if (registered_fb[i] != NULL) {
|
|
|
|
|
info_idx = i;
|
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
fbcon_takeover(0);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
module_init(fb_console_init);
|
|
|
|
|
|
|
|
|
|
#ifdef MODULE
|
|
|
|
|
|
|
|
|
|
static void __exit fb_console_exit(void)
|
|
|
|
|
{
|
|
|
|
|
acquire_console_sem();
|
|
|
|
|
fb_unregister_client(&fbcon_event_notifier);
|
|
|
|
|
release_console_sem();
|
|
|
|
|
give_up_console(&fb_con);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
module_exit(fb_console_exit);
|
|
|
|
|
|
|
|
|
|
#endif
|
|
|
|
|
|
|
|
|
|
MODULE_LICENSE("GPL");
|