2 * linux/drivers/video/console/fbcon.h -- Low level frame buffer based console driver
4 * Copyright (C) 1997 Geert Uytterhoeven
6 * This file is subject to the terms and conditions of the GNU General Public
7 * License. See the file COPYING in the main directory of this archive
11 #ifndef _VIDEO_FBCON_H
12 #define _VIDEO_FBCON_H
14 #include <linux/config.h>
15 #include <linux/types.h>
16 #include <linux/vt_buffer.h>
17 #include <linux/vt_kern.h>
21 #define FBCON_FLAGS_INIT 1
24 * This is the interface between the low-level console driver and the
25 * low-level frame buffer device
29 /* Filled in by the frame buffer device */
30 u_short inverse; /* != 0 text black on white as default */
31 /* Filled in by the low-level console driver */
33 int userfont; /* != 0 if fontdata kmalloc()ed */
34 u_short scrollmode; /* Scroll Method */
35 short yscroll; /* Hardware scrolling */
36 int vrows; /* number of virtual rows */
47 struct fb_bitfield red;
48 struct fb_bitfield green;
49 struct fb_bitfield blue;
50 struct fb_bitfield transp;
51 struct fb_videomode *mode;
55 void (*bmove)(struct vc_data *vc, struct fb_info *info, int sy,
56 int sx, int dy, int dx, int height, int width);
57 void (*clear)(struct vc_data *vc, struct fb_info *info, int sy,
58 int sx, int height, int width);
59 void (*putcs)(struct vc_data *vc, struct fb_info *info,
60 const unsigned short *s, int count, int yy, int xx,
62 void (*clear_margins)(struct vc_data *vc, struct fb_info *info,
64 void (*cursor)(struct vc_data *vc, struct fb_info *info,
65 struct display *p, int mode, int softback_lines, int fg, int bg);
67 struct timer_list cursor_timer; /* Cursor timer */
68 struct fb_cursor cursor_state;
69 int currcon; /* Current VC. */
82 #define attr_fgcol(fgshift,s) \
83 (((s) >> (fgshift)) & 0x0f)
84 #define attr_bgcol(bgshift,s) \
85 (((s) >> (bgshift)) & 0x0f)
86 #define attr_bgcol_ec(bgshift,vc) \
87 ((vc) ? (((vc)->vc_video_erase_char >> (bgshift)) & 0x0f) : 0)
88 #define attr_fgcol_ec(fgshift,vc) \
89 ((vc) ? (((vc)->vc_video_erase_char >> (fgshift)) & 0x0f) : 0)
92 #define attr_bold(s) \
94 #define attr_reverse(s) \
96 #define attr_underline(s) \
98 #define attr_blink(s) \
102 #define REFCOUNT(fd) (((int *)(fd))[-1])
103 #define FNTSIZE(fd) (((int *)(fd))[-2])
104 #define FNTCHARCNT(fd) (((int *)(fd))[-3])
105 #define FNTSUM(fd) (((int *)(fd))[-4])
106 #define FONT_EXTRA_WORDS 4
112 /* There are several methods fbcon can use to move text around the screen:
115 *---------------------------------------------
116 * SCROLL_MOVE copyarea No No
117 * SCROLL_PAN_MOVE copyarea Yes No
118 * SCROLL_WRAP_MOVE copyarea No Yes
119 * SCROLL_REDRAW imageblit No No
120 * SCROLL_PAN_REDRAW imageblit Yes No
121 * SCROLL_WRAP_REDRAW imageblit No Yes
123 * (SCROLL_WRAP_REDRAW is not implemented yet)
125 * In general, fbcon will choose the best scrolling
126 * method based on the rule below:
128 * Pan/Wrap > accel imageblit > accel copyarea >
129 * soft imageblit > (soft copyarea)
131 * Exception to the rule: Pan + accel copyarea is
132 * preferred over Pan + accel imageblit.
134 * The above is typical for PCI/AGP cards. Unless
135 * overridden, fbcon will never use soft copyarea.
137 * If you need to override the above rule, set the
138 * appropriate flags in fb_info->flags. For example,
139 * to prefer copyarea over imageblit, set
143 * + use the hardware engine to move the text
144 * (hw-accelerated copyarea() and fillrect())
145 * + use hardware-supported panning on a large virtual screen
146 * + amifb can not only pan, but also wrap the display by N lines
147 * (i.e. visible line i = physical line (i+N) % yres).
148 * + read what's already rendered on the screen and
149 * write it in a different place (this is cfb_copyarea())
150 * + re-render the text to the screen
152 * Whether to use wrapping or panning can only be figured out at
153 * runtime (when we know whether our font height is a multiple
154 * of the pan/wrap step)
158 #define SCROLL_MOVE 0x001
159 #define SCROLL_PAN_MOVE 0x002
160 #define SCROLL_WRAP_MOVE 0x003
161 #define SCROLL_REDRAW 0x004
162 #define SCROLL_PAN_REDRAW 0x005
164 #ifdef CONFIG_FB_TILEBLITTING
165 extern void fbcon_set_tileops(struct vc_data *vc, struct fb_info *info,
166 struct display *p, struct fbcon_ops *ops);
168 extern void fbcon_set_bitops(struct fbcon_ops *ops);
170 #endif /* _VIDEO_FBCON_H */