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/*
* linux/drivers/video/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
struct display {
/* Filled in by the frame buffer device */
struct fb_var_screeninfo var; /* variable infos. yoffset and vmode */
/* are updated by fbcon.c */
struct fb_cmap cmap; /* colormap */
char *screen_base; /* pointer to top of virtual screen */
/* (virtual address) */
int visual;
int type; /* see FB_TYPE_* */
int type_aux; /* Interleave for interleaved Planes */
u16 ypanstep; /* zero if no hardware ypan */
u16 ywrapstep; /* zero if no hardware ywrap */
u32 line_length; /* length of a line in bytes */
u16 can_soft_blank; /* zero if no hardware blanking */
u16 inverse; /* != 0 text black on white as default */
/* Filled in by the low-level console driver */
struct vc_data *conp; /* pointer to console data */
int vrows; /* number of virtual rows */
unsigned short cursor_x; /* current cursor position */
unsigned short cursor_y;
int fgcol; /* text colors */
int bgcol;
u32 next_line; /* offset to one line below */
u32 next_plane; /* offset to next plane */
u8 *fontdata; /* Font associated to this display */
unsigned short _fontheightlog;
unsigned short _fontwidthlog;
unsigned short _fontheight;
unsigned short _fontwidth;
int userfont; /* != 0 if fontdata kmalloc()ed */
u16 scrollmode; /* Scroll Method */
short yscroll; /* Hardware scrolling */
unsigned char fgshift, bgshift;
unsigned short charmask; /* 0xff or 0x1ff */
};
#define fontheight(p) ((p)->_fontheight)
#define fontheightlog(p) ((p)->_fontheightlog)
#ifdef FBCON_FONTWIDTH8_ONLY
/* fontwidth w is supported by dispsw */
#define FONTWIDTH(w) (1 << ((8) - 1))
/* fontwidths w1-w2 inclusive are supported by dispsw */
#define FONTWIDTHRANGE(w1,w2) FONTWIDTH(8)
#define fontwidth(p) (8)
#define fontwidthlog(p) (0)
#else
/* fontwidth w is supported by dispsw */
#define FONTWIDTH(w) (1 << ((w) - 1))
/* fontwidths w1-w2 inclusive are supported by dispsw */
#define FONTWIDTHRANGE(w1,w2) (FONTWIDTH(w2+1) - FONTWIDTH(w1))
#define fontwidth(p) ((p)->_fontwidth)
#define fontwidthlog(p) ((p)->_fontwidthlog)
#endif
/*
* Attribute Decoding
*/
/* Color */
#define attr_fgcol(p,s) \
(((s) >> ((p)->fgshift)) & 0x0f)
#define attr_bgcol(p,s) \
(((s) >> ((p)->bgshift)) & 0x0f)
#define attr_bgcol_ec(p,conp) \
((conp) ? (((conp)->vc_video_erase_char >> ((p)->bgshift)) & 0x0f) : 0)
/* Monochrome */
#define attr_bold(p,s) \
((s) & 0x200)
#define attr_reverse(p,s) \
(((s) & 0x800) ^ ((p)->inverse ? 0x800 : 0))
#define attr_underline(p,s) \
((s) & 0x400)
#define attr_blink(p,s) \
((s) & 0x8000)
/*
* Scroll Method
*/
/* Internal flags */
#define __SCROLL_YPAN 0x001
#define __SCROLL_YWRAP 0x002
#define __SCROLL_YMOVE 0x003
#define __SCROLL_YREDRAW 0x004
#define __SCROLL_YMASK 0x00f
#define __SCROLL_YFIXED 0x010
#define __SCROLL_YNOMOVE 0x020
#define __SCROLL_YPANREDRAW 0x040
#define __SCROLL_YNOPARTIAL 0x080
/* Only these should be used by the drivers */
/* Which one should you use? If you have a fast card and slow bus,
then probably just 0 to indicate fbcon should choose between
YWRAP/YPAN+MOVE/YMOVE. On the other side, if you have a fast bus
and even better if your card can do fonting (1->8/32bit painting),
you should consider either SCROLL_YREDRAW (if your card is
able to do neither YPAN/YWRAP), or SCROLL_YNOMOVE.
The best is to test it with some real life scrolling (usually, not
all lines on the screen are filled completely with non-space characters,
and REDRAW performs much better on such lines, so don't cat a file
with every line covering all screen columns, it would not be the right
benchmark).
*/
#define SCROLL_YREDRAW (__SCROLL_YFIXED|__SCROLL_YREDRAW)
#define SCROLL_YNOMOVE (__SCROLL_YNOMOVE|__SCROLL_YPANREDRAW)
/* SCROLL_YNOPARTIAL, used in combination with the above, is for video
cards which can not handle using panning to scroll a portion of the
screen without excessive flicker. Panning will only be used for
whole screens.
*/
/* Namespace consistency */
#define SCROLL_YNOPARTIAL __SCROLL_YNOPARTIAL
#endif /* _VIDEO_FBCON_H */
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