You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
223 lines
6.4 KiB
223 lines
6.4 KiB
/*
|
|
* linux/drivers/video/console/fbcon.h -- Low level frame buffer based console driver
|
|
*
|
|
* Copyright (C) 1997 Geert Uytterhoeven
|
|
*
|
|
* 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.
|
|
*/
|
|
|
|
#ifndef _VIDEO_FBCON_H
|
|
#define _VIDEO_FBCON_H
|
|
|
|
#include <linux/types.h>
|
|
#include <linux/vt_buffer.h>
|
|
#include <linux/vt_kern.h>
|
|
|
|
#include <asm/io.h>
|
|
|
|
#define FBCON_FLAGS_INIT 1
|
|
#define FBCON_FLAGS_CURSOR_TIMER 2
|
|
|
|
/*
|
|
* This is the interface between the low-level console driver and the
|
|
* low-level frame buffer device
|
|
*/
|
|
|
|
struct display {
|
|
/* Filled in by the low-level console driver */
|
|
const u_char *fontdata;
|
|
int userfont; /* != 0 if fontdata kmalloc()ed */
|
|
u_short scrollmode; /* Scroll Method */
|
|
u_short inverse; /* != 0 text black on white as default */
|
|
short yscroll; /* Hardware scrolling */
|
|
int vrows; /* number of virtual rows */
|
|
int cursor_shape;
|
|
int con_rotate;
|
|
u32 xres_virtual;
|
|
u32 yres_virtual;
|
|
u32 height;
|
|
u32 width;
|
|
u32 bits_per_pixel;
|
|
u32 grayscale;
|
|
u32 nonstd;
|
|
u32 accel_flags;
|
|
u32 rotate;
|
|
struct fb_bitfield red;
|
|
struct fb_bitfield green;
|
|
struct fb_bitfield blue;
|
|
struct fb_bitfield transp;
|
|
const struct fb_videomode *mode;
|
|
};
|
|
|
|
struct fbcon_ops {
|
|
void (*bmove)(struct vc_data *vc, struct fb_info *info, int sy,
|
|
int sx, int dy, int dx, int height, int width);
|
|
void (*clear)(struct vc_data *vc, struct fb_info *info, int sy,
|
|
int sx, int height, int width);
|
|
void (*putcs)(struct vc_data *vc, struct fb_info *info,
|
|
const unsigned short *s, int count, int yy, int xx,
|
|
int fg, int bg);
|
|
void (*clear_margins)(struct vc_data *vc, struct fb_info *info,
|
|
int bottom_only);
|
|
void (*cursor)(struct vc_data *vc, struct fb_info *info, int mode,
|
|
int softback_lines, int fg, int bg);
|
|
int (*update_start)(struct fb_info *info);
|
|
int (*rotate_font)(struct fb_info *info, struct vc_data *vc);
|
|
struct fb_var_screeninfo var; /* copy of the current fb_var_screeninfo */
|
|
struct timer_list cursor_timer; /* Cursor timer */
|
|
struct fb_cursor cursor_state;
|
|
struct display *p;
|
|
int currcon; /* Current VC. */
|
|
int cursor_flash;
|
|
int cursor_reset;
|
|
int blank_state;
|
|
int graphics;
|
|
int flags;
|
|
int rotate;
|
|
int cur_rotate;
|
|
char *cursor_data;
|
|
u8 *fontbuffer;
|
|
u8 *fontdata;
|
|
u8 *cursor_src;
|
|
u32 cursor_size;
|
|
u32 fd_size;
|
|
};
|
|
/*
|
|
* Attribute Decoding
|
|
*/
|
|
|
|
/* Color */
|
|
#define attr_fgcol(fgshift,s) \
|
|
(((s) >> (fgshift)) & 0x0f)
|
|
#define attr_bgcol(bgshift,s) \
|
|
(((s) >> (bgshift)) & 0x0f)
|
|
#define attr_bgcol_ec(bgshift,vc) \
|
|
((vc) ? (((vc)->vc_video_erase_char >> (bgshift)) & 0x0f) : 0)
|
|
#define attr_fgcol_ec(fgshift,vc) \
|
|
((vc) ? (((vc)->vc_video_erase_char >> (fgshift)) & 0x0f) : 0)
|
|
|
|
/* Monochrome */
|
|
#define attr_bold(s) \
|
|
((s) & 0x200)
|
|
#define attr_reverse(s) \
|
|
((s) & 0x800)
|
|
#define attr_underline(s) \
|
|
((s) & 0x400)
|
|
#define attr_blink(s) \
|
|
((s) & 0x8000)
|
|
|
|
/* Font */
|
|
#define REFCOUNT(fd) (((int *)(fd))[-1])
|
|
#define FNTSIZE(fd) (((int *)(fd))[-2])
|
|
#define FNTCHARCNT(fd) (((int *)(fd))[-3])
|
|
#define FNTSUM(fd) (((int *)(fd))[-4])
|
|
#define FONT_EXTRA_WORDS 4
|
|
|
|
/*
|
|
* Scroll Method
|
|
*/
|
|
|
|
/* There are several methods fbcon can use to move text around the screen:
|
|
*
|
|
* Operation Pan Wrap
|
|
*---------------------------------------------
|
|
* SCROLL_MOVE copyarea No No
|
|
* SCROLL_PAN_MOVE copyarea Yes No
|
|
* SCROLL_WRAP_MOVE copyarea No Yes
|
|
* SCROLL_REDRAW imageblit No No
|
|
* SCROLL_PAN_REDRAW imageblit Yes No
|
|
* SCROLL_WRAP_REDRAW imageblit No Yes
|
|
*
|
|
* (SCROLL_WRAP_REDRAW is not implemented yet)
|
|
*
|
|
* In general, fbcon will choose the best scrolling
|
|
* method based on the rule below:
|
|
*
|
|
* Pan/Wrap > accel imageblit > accel copyarea >
|
|
* soft imageblit > (soft copyarea)
|
|
*
|
|
* Exception to the rule: Pan + accel copyarea is
|
|
* preferred over Pan + accel imageblit.
|
|
*
|
|
* The above is typical for PCI/AGP cards. Unless
|
|
* overridden, fbcon will never use soft copyarea.
|
|
*
|
|
* If you need to override the above rule, set the
|
|
* appropriate flags in fb_info->flags. For example,
|
|
* to prefer copyarea over imageblit, set
|
|
* FBINFO_READS_FAST.
|
|
*
|
|
* Other notes:
|
|
* + use the hardware engine to move the text
|
|
* (hw-accelerated copyarea() and fillrect())
|
|
* + use hardware-supported panning on a large virtual screen
|
|
* + amifb can not only pan, but also wrap the display by N lines
|
|
* (i.e. visible line i = physical line (i+N) % yres).
|
|
* + read what's already rendered on the screen and
|
|
* write it in a different place (this is cfb_copyarea())
|
|
* + re-render the text to the screen
|
|
*
|
|
* Whether to use wrapping or panning can only be figured out at
|
|
* runtime (when we know whether our font height is a multiple
|
|
* of the pan/wrap step)
|
|
*
|
|
*/
|
|
|
|
#define SCROLL_MOVE 0x001
|
|
#define SCROLL_PAN_MOVE 0x002
|
|
#define SCROLL_WRAP_MOVE 0x003
|
|
#define SCROLL_REDRAW 0x004
|
|
#define SCROLL_PAN_REDRAW 0x005
|
|
|
|
#ifdef CONFIG_FB_TILEBLITTING
|
|
extern void fbcon_set_tileops(struct vc_data *vc, struct fb_info *info);
|
|
#endif
|
|
extern void fbcon_set_bitops(struct fbcon_ops *ops);
|
|
extern int soft_cursor(struct fb_info *info, struct fb_cursor *cursor);
|
|
extern struct class *fb_class;
|
|
|
|
#define FBCON_ATTRIBUTE_UNDERLINE 1
|
|
#define FBCON_ATTRIBUTE_REVERSE 2
|
|
#define FBCON_ATTRIBUTE_BOLD 4
|
|
|
|
static inline int real_y(struct display *p, int ypos)
|
|
{
|
|
int rows = p->vrows;
|
|
|
|
ypos += p->yscroll;
|
|
return ypos < rows ? ypos : ypos - rows;
|
|
}
|
|
|
|
|
|
static inline int get_attribute(struct fb_info *info, u16 c)
|
|
{
|
|
int attribute = 0;
|
|
|
|
if (fb_get_color_depth(&info->var, &info->fix) == 1) {
|
|
if (attr_underline(c))
|
|
attribute |= FBCON_ATTRIBUTE_UNDERLINE;
|
|
if (attr_reverse(c))
|
|
attribute |= FBCON_ATTRIBUTE_REVERSE;
|
|
if (attr_bold(c))
|
|
attribute |= FBCON_ATTRIBUTE_BOLD;
|
|
}
|
|
|
|
return attribute;
|
|
}
|
|
|
|
#define FBCON_SWAP(i,r,v) ({ \
|
|
typeof(r) _r = (r); \
|
|
typeof(v) _v = (v); \
|
|
(void) (&_r == &_v); \
|
|
(i == FB_ROTATE_UR || i == FB_ROTATE_UD) ? _r : _v; })
|
|
|
|
#ifdef CONFIG_FRAMEBUFFER_CONSOLE_ROTATION
|
|
extern void fbcon_set_rotate(struct fbcon_ops *ops);
|
|
#else
|
|
#define fbcon_set_rotate(x) do {} while(0)
|
|
#endif /* CONFIG_FRAMEBUFFER_CONSOLE_ROTATION */
|
|
|
|
#endif /* _VIDEO_FBCON_H */
|
|
|
|
|