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/* Copyright (C) 1989, 1995 Aladdin Enterprises. All rights reserved.
This file is part of GNU Ghostscript.
GNU Ghostscript is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY. No author or distributor accepts responsibility to
anyone for the consequences of using it or for whether it serves any
particular purpose or works at all, unless he says so in writing. Refer
to the GNU Ghostscript General Public License for full details.
*/
/* gdevsvga.h */
/* SuperVGA display definitions */
/* Requires gdevpcfb.h */
/* Common procedures */
/* See gxdevice.h for the definitions of the procedures. */
dev_proc_close_device(svga_close);
dev_proc_map_rgb_color(svga_map_rgb_color);
dev_proc_map_color_rgb(svga_map_color_rgb);
dev_proc_fill_rectangle(svga_fill_rectangle);
dev_proc_copy_mono(svga_copy_mono);
dev_proc_copy_color(svga_copy_color);
dev_proc_get_params(svga_get_params);
dev_proc_put_params(svga_put_params);
dev_proc_get_bits(svga_get_bits);
dev_proc_get_alpha_bits(svga_get_alpha_bits);
dev_proc_copy_alpha(svga_copy_alpha);
/* Table structure for looking up graphics modes. */
typedef struct {
int width, height; /* "key" */
int mode; /* "value" */
} mode_info;
/* The device descriptor structure */
typedef struct gx_device_svga_s gx_device_svga;
struct gx_device_svga_s {
gx_device_common;
int (*get_mode)(P0());
void (*set_mode)(P1(int));
void (*set_page)(P3(gx_device_svga *fbdev, int pnum, int wnum));
bool fixed_colors; /* if true, used a fixed palette */
int alpha_text, alpha_graphics; /* if >1, map alpha to saturation */
const mode_info _ds *mode; /* BIOS display mode info */
uint raster; /* frame buffer bytes per line */
int current_page; /* current page */
int wnum_read, wnum_write; /* window #s for read vs. write */
/* Following are device-specific. */
union {
struct {
void (*bios_set_page)(P2(int, int)); /* set-page function */
int pn_shift; /* log2(64K/granularity) */
} vesa;
struct {
int select_reg; /* page-select register */
} atiw;
struct {
int et_model; /* 4 for ET4000, */
/* 3 for ET3000 */
} tseng;
} info;
};
/* The initial parameters map an appropriate fraction of */
/* the screen to a full-page coordinate space. */
/* This may or may not be what is desired! */
#define svga_color_device(procs, name, depth, maxv, dither, get_mode, set_mode, set_page) {\
std_device_color_body(gx_device_svga, &procs, name,\
640, 480,\
480 / PAGE_HEIGHT_INCHES, 480 / PAGE_HEIGHT_INCHES,\
/*dci_color(*/depth, maxv, dither/*)*/),\
{ 0 }, /* std_procs */\
get_mode, set_mode, set_page,\
0 /*fixed_colors*/, 1 /*alpha_text*/, 1 /*alpha_graphics*/\
}
#define svga_device(procs, name, get_mode, set_mode, set_page)\
svga_color_device(procs, name, 8, 31, 4, get_mode, set_mode, set_page)
/* Utility procedures */
void svga_init_colors(P1(gx_device *));
int svga_find_mode(P2(gx_device *, const mode_info _ds *));
int svga_open(P1(gx_device *));
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