142 lines
2.4 KiB
C++
142 lines
2.4 KiB
C++
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#include <stdio.h>
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#include <stdarg.h>
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#include <stdlib.h>
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#include <string.h>
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#include <dos.h>
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#include <conio.h>
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#include <ctype.h>
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#include "brender.h"
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#include "brassert.h"
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#include "syshost.h"
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#include "dosio.h"
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#include "dosgfxcm.h"
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#if HAS_ENV_H
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#include <env.h>
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#endif
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/*
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* Pointers to default strings
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*/
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char *_DOSGfxDefaultSetupString = DOSGFX_DEFAULT;
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char *_DOSGfxEnvironmentVar = DOSGFX_ENVNAME;
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int old_screen_mode; /* last screen mode */
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int _DOSGfxIndexed;
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pixelmap_info pixelmap_bit_sizes[]={
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{
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BR_PMT_INDEX_8,
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8,1,
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},
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{
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BR_PMT_RGB_555,
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15,2,
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},
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{
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BR_PMT_RGB_565,
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16,2,
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},
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{
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BR_PMT_RGB_888,
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24,3,
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},
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{
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BR_PMT_RGBX_888,
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24,4,
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},
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{
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BR_PMT_RGBA_8888,
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32,4,
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},
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};
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int pixelmap_bit_sizes_count = sizeof(pixelmap_bit_sizes)/sizeof(pixelmap_bit_sizes[0]);
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void _ProcessSetupString(char *string,setup_details *details)
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{
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char *current_tok;
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int current_value;
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char search_string[80];
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strncpy(search_string,string,BR_ASIZE(search_string)-1);
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/*
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* setup defaults
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*/
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details->display_type = strtok(search_string,",");
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for(;;) {
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current_tok = strtok(NULL,":");
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if(current_tok == NULL)
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break;
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if(isdigit(*current_tok))
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{
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current_value = strtol(current_tok,NULL,0);
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switch(toupper(*(current_tok-2)))
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{
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case'W':details->width = current_value;
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break;
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case'H':details->height = current_value;
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break;
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case'B':details->bitsperpixel = current_value;
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break;
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case'C':details->doublebuffertype = current_value;
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break;
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case'M':details->mode = current_value;
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break;
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case'L':details->set_scanline_length = current_value;
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break;
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default:BR_ERROR1("Unknown argument '%c' in setup string",*(current_tok-2));
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break;
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}
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}
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}
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}
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void _PaletteSet(br_pixelmap *pm)
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{
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char *entries;
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int i;
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/*
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* Don't set palette if in true colour mode
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* (Some cards use CLUT for gamma corection ramps)
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*/
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if(!_DOSGfxIndexed)
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return;
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/*
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* only one way to set a palette
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*/
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UASSERT(pm->type == BR_PMT_RGBX_888);
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for(i=0, entries=(void *)pm->pixels; i<256; i++, entries += pm->row_bytes)
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_PaletteSetEntry(i,*(br_colour *)entries);
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}
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void _PaletteSetEntry(int i,br_colour colour)
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{
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#if 1
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/*
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* Setup the palette by writing the DAC registers directly
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*/
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outp(VGA_PAL_ADDRESS,i);
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outp(VGA_PAL_DATA,BR_RED(colour) >> 2);
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outp(VGA_PAL_DATA,BR_GRN(colour) >> 2);
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outp(VGA_PAL_DATA,BR_BLU(colour) >> 2);
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#endif
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}
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