171 lines
5.1 KiB
C
171 lines
5.1 KiB
C
/*
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* linux/drivers/video/console/fbcon.h -- Low level frame buffer based console driver
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*
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* Copyright (C) 1997 Geert Uytterhoeven
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*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file COPYING in the main directory of this archive
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* for more details.
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*/
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#ifndef _VIDEO_FBCON_H
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#define _VIDEO_FBCON_H
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#include <linux/config.h>
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#include <linux/types.h>
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#include <linux/vt_buffer.h>
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#include <linux/vt_kern.h>
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#include <asm/io.h>
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#define FBCON_FLAGS_INIT 1
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/*
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* This is the interface between the low-level console driver and the
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* low-level frame buffer device
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*/
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struct display {
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/* Filled in by the frame buffer device */
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u_short inverse; /* != 0 text black on white as default */
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/* Filled in by the low-level console driver */
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u_char *fontdata;
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int userfont; /* != 0 if fontdata kmalloc()ed */
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u_short scrollmode; /* Scroll Method */
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short yscroll; /* Hardware scrolling */
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int vrows; /* number of virtual rows */
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int cursor_shape;
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u32 xres_virtual;
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u32 yres_virtual;
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u32 height;
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u32 width;
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u32 bits_per_pixel;
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u32 grayscale;
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u32 nonstd;
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u32 accel_flags;
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u32 rotate;
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struct fb_bitfield red;
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struct fb_bitfield green;
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struct fb_bitfield blue;
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struct fb_bitfield transp;
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struct fb_videomode *mode;
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};
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struct fbcon_ops {
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void (*bmove)(struct vc_data *vc, struct fb_info *info, int sy,
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int sx, int dy, int dx, int height, int width);
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void (*clear)(struct vc_data *vc, struct fb_info *info, int sy,
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int sx, int height, int width);
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void (*putcs)(struct vc_data *vc, struct fb_info *info,
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const unsigned short *s, int count, int yy, int xx,
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int fg, int bg);
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void (*clear_margins)(struct vc_data *vc, struct fb_info *info,
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int bottom_only);
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void (*cursor)(struct vc_data *vc, struct fb_info *info,
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struct display *p, int mode, int softback_lines, int fg, int bg);
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struct timer_list cursor_timer; /* Cursor timer */
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struct fb_cursor cursor_state;
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int currcon; /* Current VC. */
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int cursor_flash;
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int cursor_reset;
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int blank_state;
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int graphics;
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int flags;
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char *cursor_data;
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};
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/*
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* Attribute Decoding
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*/
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/* Color */
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#define attr_fgcol(fgshift,s) \
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(((s) >> (fgshift)) & 0x0f)
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#define attr_bgcol(bgshift,s) \
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(((s) >> (bgshift)) & 0x0f)
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#define attr_bgcol_ec(bgshift,vc) \
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((vc) ? (((vc)->vc_video_erase_char >> (bgshift)) & 0x0f) : 0)
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#define attr_fgcol_ec(fgshift,vc) \
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((vc) ? (((vc)->vc_video_erase_char >> (fgshift)) & 0x0f) : 0)
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/* Monochrome */
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#define attr_bold(s) \
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((s) & 0x200)
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#define attr_reverse(s) \
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((s) & 0x800)
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#define attr_underline(s) \
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((s) & 0x400)
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#define attr_blink(s) \
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((s) & 0x8000)
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/* Font */
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#define REFCOUNT(fd) (((int *)(fd))[-1])
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#define FNTSIZE(fd) (((int *)(fd))[-2])
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#define FNTCHARCNT(fd) (((int *)(fd))[-3])
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#define FNTSUM(fd) (((int *)(fd))[-4])
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#define FONT_EXTRA_WORDS 4
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/*
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* Scroll Method
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*/
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/* There are several methods fbcon can use to move text around the screen:
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*
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* Operation Pan Wrap
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*---------------------------------------------
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* SCROLL_MOVE copyarea No No
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* SCROLL_PAN_MOVE copyarea Yes No
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* SCROLL_WRAP_MOVE copyarea No Yes
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* SCROLL_REDRAW imageblit No No
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* SCROLL_PAN_REDRAW imageblit Yes No
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* SCROLL_WRAP_REDRAW imageblit No Yes
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*
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* (SCROLL_WRAP_REDRAW is not implemented yet)
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*
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* In general, fbcon will choose the best scrolling
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* method based on the rule below:
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*
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* Pan/Wrap > accel imageblit > accel copyarea >
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* soft imageblit > (soft copyarea)
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*
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* Exception to the rule: Pan + accel copyarea is
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* preferred over Pan + accel imageblit.
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*
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* The above is typical for PCI/AGP cards. Unless
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* overridden, fbcon will never use soft copyarea.
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*
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* If you need to override the above rule, set the
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* appropriate flags in fb_info->flags. For example,
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* to prefer copyarea over imageblit, set
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* FBINFO_READS_FAST.
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*
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* Other notes:
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* + use the hardware engine to move the text
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* (hw-accelerated copyarea() and fillrect())
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* + use hardware-supported panning on a large virtual screen
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* + amifb can not only pan, but also wrap the display by N lines
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* (i.e. visible line i = physical line (i+N) % yres).
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* + read what's already rendered on the screen and
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* write it in a different place (this is cfb_copyarea())
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* + re-render the text to the screen
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*
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* Whether to use wrapping or panning can only be figured out at
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* runtime (when we know whether our font height is a multiple
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* of the pan/wrap step)
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*
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*/
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#define SCROLL_MOVE 0x001
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#define SCROLL_PAN_MOVE 0x002
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#define SCROLL_WRAP_MOVE 0x003
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#define SCROLL_REDRAW 0x004
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#define SCROLL_PAN_REDRAW 0x005
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#ifdef CONFIG_FB_TILEBLITTING
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extern void fbcon_set_tileops(struct vc_data *vc, struct fb_info *info,
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struct display *p, struct fbcon_ops *ops);
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#endif
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extern void fbcon_set_bitops(struct fbcon_ops *ops);
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#endif /* _VIDEO_FBCON_H */
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