/* * 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/config.h> #include <linux/types.h> #include <linux/vt_buffer.h> #include <linux/vt_kern.h> #include <asm/io.h> #define FBCON_FLAGS_INIT 1 /* * This is the interface between the low-level console driver and the * low-level frame buffer device */ struct display { /* Filled in by the frame buffer device */ u_short inverse; /* != 0 text black on white as default */ /* Filled in by the low-level console driver */ u_char *fontdata; int userfont; /* != 0 if fontdata kmalloc()ed */ u_short scrollmode; /* Scroll Method */ short yscroll; /* Hardware scrolling */ int vrows; /* number of virtual rows */ int cursor_shape; 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; 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, struct display *p, int mode, int softback_lines, int fg, int bg); struct timer_list cursor_timer; /* Cursor timer */ struct fb_cursor cursor_state; int currcon; /* Current VC. */ int cursor_flash; int cursor_reset; int blank_state; int graphics; int flags; char *cursor_data; }; /* * 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, struct display *p, struct fbcon_ops *ops); #endif extern void fbcon_set_bitops(struct fbcon_ops *ops); #endif /* _VIDEO_FBCON_H */