2 * linux/drivers/video/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
15 /* Filled in by the frame buffer device */
16 struct fb_var_screeninfo var; /* variable infos. yoffset and vmode */
17 /* are updated by fbcon.c */
18 struct fb_cmap cmap; /* colormap */
19 char *screen_base; /* pointer to top of virtual screen */
20 /* (virtual address) */
22 int type; /* see FB_TYPE_* */
23 int type_aux; /* Interleave for interleaved Planes */
24 u16 ypanstep; /* zero if no hardware ypan */
25 u16 ywrapstep; /* zero if no hardware ywrap */
26 u32 line_length; /* length of a line in bytes */
27 u16 can_soft_blank; /* zero if no hardware blanking */
28 u16 inverse; /* != 0 text black on white as default */
30 /* Filled in by the low-level console driver */
32 struct vc_data *conp; /* pointer to console data */
33 int vrows; /* number of virtual rows */
34 unsigned short cursor_x; /* current cursor position */
35 unsigned short cursor_y;
36 int fgcol; /* text colors */
38 u32 next_line; /* offset to one line below */
39 u32 next_plane; /* offset to next plane */
40 u8 *fontdata; /* Font associated to this display */
41 unsigned short _fontheightlog;
42 unsigned short _fontwidthlog;
43 unsigned short _fontheight;
44 unsigned short _fontwidth;
45 int userfont; /* != 0 if fontdata kmalloc()ed */
46 u16 scrollmode; /* Scroll Method */
47 short yscroll; /* Hardware scrolling */
48 unsigned char fgshift, bgshift;
49 unsigned short charmask; /* 0xff or 0x1ff */
53 #define fontheight(p) ((p)->_fontheight)
54 #define fontheightlog(p) ((p)->_fontheightlog)
56 #ifdef FBCON_FONTWIDTH8_ONLY
58 /* fontwidth w is supported by dispsw */
59 #define FONTWIDTH(w) (1 << ((8) - 1))
60 /* fontwidths w1-w2 inclusive are supported by dispsw */
61 #define FONTWIDTHRANGE(w1,w2) FONTWIDTH(8)
63 #define fontwidth(p) (8)
64 #define fontwidthlog(p) (0)
68 /* fontwidth w is supported by dispsw */
69 #define FONTWIDTH(w) (1 << ((w) - 1))
70 /* fontwidths w1-w2 inclusive are supported by dispsw */
71 #define FONTWIDTHRANGE(w1,w2) (FONTWIDTH(w2+1) - FONTWIDTH(w1))
73 #define fontwidth(p) ((p)->_fontwidth)
74 #define fontwidthlog(p) ((p)->_fontwidthlog)
83 #define attr_fgcol(p,s) \
84 (((s) >> ((p)->fgshift)) & 0x0f)
85 #define attr_bgcol(p,s) \
86 (((s) >> ((p)->bgshift)) & 0x0f)
87 #define attr_bgcol_ec(p,conp) \
88 ((conp) ? (((conp)->vc_video_erase_char >> ((p)->bgshift)) & 0x0f) : 0)
91 #define attr_bold(p,s) \
93 #define attr_reverse(p,s) \
94 (((s) & 0x800) ^ ((p)->inverse ? 0x800 : 0))
95 #define attr_underline(p,s) \
97 #define attr_blink(p,s) \
105 #define __SCROLL_YPAN 0x001
106 #define __SCROLL_YWRAP 0x002
107 #define __SCROLL_YMOVE 0x003
108 #define __SCROLL_YREDRAW 0x004
109 #define __SCROLL_YMASK 0x00f
110 #define __SCROLL_YFIXED 0x010
111 #define __SCROLL_YNOMOVE 0x020
112 #define __SCROLL_YPANREDRAW 0x040
113 #define __SCROLL_YNOPARTIAL 0x080
115 /* Only these should be used by the drivers */
116 /* Which one should you use? If you have a fast card and slow bus,
117 then probably just 0 to indicate fbcon should choose between
118 YWRAP/YPAN+MOVE/YMOVE. On the other side, if you have a fast bus
119 and even better if your card can do fonting (1->8/32bit painting),
120 you should consider either SCROLL_YREDRAW (if your card is
121 able to do neither YPAN/YWRAP), or SCROLL_YNOMOVE.
122 The best is to test it with some real life scrolling (usually, not
123 all lines on the screen are filled completely with non-space characters,
124 and REDRAW performs much better on such lines, so don't cat a file
125 with every line covering all screen columns, it would not be the right
128 #define SCROLL_YREDRAW (__SCROLL_YFIXED|__SCROLL_YREDRAW)
129 #define SCROLL_YNOMOVE (__SCROLL_YNOMOVE|__SCROLL_YPANREDRAW)
131 /* SCROLL_YNOPARTIAL, used in combination with the above, is for video
132 cards which can not handle using panning to scroll a portion of the
133 screen without excessive flicker. Panning will only be used for
136 /* Namespace consistency */
137 #define SCROLL_YNOPARTIAL __SCROLL_YNOPARTIAL
139 #endif /* _VIDEO_FBCON_H */