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
22 #define FBCON_FLAGS_CURSOR_TIMER 2
25 * This is the interface between the low-level console driver and the
26 * low-level frame buffer device
30 /* Filled in by the frame buffer device */
31 u_short inverse; /* != 0 text black on white as default */
32 /* Filled in by the low-level console driver */
33 const u_char *fontdata;
34 int userfont; /* != 0 if fontdata kmalloc()ed */
35 u_short scrollmode; /* Scroll Method */
36 short yscroll; /* Hardware scrolling */
37 int vrows; /* number of virtual rows */
48 struct fb_bitfield red;
49 struct fb_bitfield green;
50 struct fb_bitfield blue;
51 struct fb_bitfield transp;
52 struct fb_videomode *mode;
56 void (*bmove)(struct vc_data *vc, struct fb_info *info, int sy,
57 int sx, int dy, int dx, int height, int width);
58 void (*clear)(struct vc_data *vc, struct fb_info *info, int sy,
59 int sx, int height, int width);
60 void (*putcs)(struct vc_data *vc, struct fb_info *info,
61 const unsigned short *s, int count, int yy, int xx,
63 void (*clear_margins)(struct vc_data *vc, struct fb_info *info,
65 void (*cursor)(struct vc_data *vc, struct fb_info *info,
66 struct display *p, int mode, int softback_lines, int fg, int bg);
68 struct timer_list cursor_timer; /* Cursor timer */
69 struct fb_cursor cursor_state;
70 int currcon; /* Current VC. */
83 #define attr_fgcol(fgshift,s) \
84 (((s) >> (fgshift)) & 0x0f)
85 #define attr_bgcol(bgshift,s) \
86 (((s) >> (bgshift)) & 0x0f)
87 #define attr_bgcol_ec(bgshift,vc) \
88 ((vc) ? (((vc)->vc_video_erase_char >> (bgshift)) & 0x0f) : 0)
89 #define attr_fgcol_ec(fgshift,vc) \
90 ((vc) ? (((vc)->vc_video_erase_char >> (fgshift)) & 0x0f) : 0)
93 #define attr_bold(s) \
95 #define attr_reverse(s) \
97 #define attr_underline(s) \
99 #define attr_blink(s) \
103 #define REFCOUNT(fd) (((int *)(fd))[-1])
104 #define FNTSIZE(fd) (((int *)(fd))[-2])
105 #define FNTCHARCNT(fd) (((int *)(fd))[-3])
106 #define FNTSUM(fd) (((int *)(fd))[-4])
107 #define FONT_EXTRA_WORDS 4
113 /* There are several methods fbcon can use to move text around the screen:
116 *---------------------------------------------
117 * SCROLL_MOVE copyarea No No
118 * SCROLL_PAN_MOVE copyarea Yes No
119 * SCROLL_WRAP_MOVE copyarea No Yes
120 * SCROLL_REDRAW imageblit No No
121 * SCROLL_PAN_REDRAW imageblit Yes No
122 * SCROLL_WRAP_REDRAW imageblit No Yes
124 * (SCROLL_WRAP_REDRAW is not implemented yet)
126 * In general, fbcon will choose the best scrolling
127 * method based on the rule below:
129 * Pan/Wrap > accel imageblit > accel copyarea >
130 * soft imageblit > (soft copyarea)
132 * Exception to the rule: Pan + accel copyarea is
133 * preferred over Pan + accel imageblit.
135 * The above is typical for PCI/AGP cards. Unless
136 * overridden, fbcon will never use soft copyarea.
138 * If you need to override the above rule, set the
139 * appropriate flags in fb_info->flags. For example,
140 * to prefer copyarea over imageblit, set
144 * + use the hardware engine to move the text
145 * (hw-accelerated copyarea() and fillrect())
146 * + use hardware-supported panning on a large virtual screen
147 * + amifb can not only pan, but also wrap the display by N lines
148 * (i.e. visible line i = physical line (i+N) % yres).
149 * + read what's already rendered on the screen and
150 * write it in a different place (this is cfb_copyarea())
151 * + re-render the text to the screen
153 * Whether to use wrapping or panning can only be figured out at
154 * runtime (when we know whether our font height is a multiple
155 * of the pan/wrap step)
159 #define SCROLL_MOVE 0x001
160 #define SCROLL_PAN_MOVE 0x002
161 #define SCROLL_WRAP_MOVE 0x003
162 #define SCROLL_REDRAW 0x004
163 #define SCROLL_PAN_REDRAW 0x005
165 #ifdef CONFIG_FB_TILEBLITTING
166 extern void fbcon_set_tileops(struct vc_data *vc, struct fb_info *info,
167 struct display *p, struct fbcon_ops *ops);
169 extern void fbcon_set_bitops(struct fbcon_ops *ops);
171 #endif /* _VIDEO_FBCON_H */