72 lines
1.4 KiB
C
72 lines
1.4 KiB
C
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/* Framebuffer Graphics Libary for Linux, Copyright 1993 Harm Hanemaayer */
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/* palette.c Palette functions (wrapper over vgalib) */
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#include <stdlib.h>
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#include <vga.h>
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#include "vgagl.h"
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#include "def.h"
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/* 256-color palette functions */
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/* There was a horrible bug here in 0.8x -- green and blue were swapped... */
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void gl_getpalettecolor(int c, int *r, int *g, int *b)
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{
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vga_getpalette(c, r, g, b);
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}
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void gl_setpalettecolor(int c, int r, int g, int b)
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{
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vga_setpalette(c, r, g, b);
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}
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void gl_setpalettecolors(int s, int n, void *_dp)
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{
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uchar *dp = _dp;
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int i;
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for (i = s; i < s + n; i++) {
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unsigned char r, g, b;
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r = *(dp++);
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g = *(dp++);
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b = *(dp++);
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vga_setpalette(i, r, g, b);
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}
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}
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void gl_getpalettecolors(int s, int n, void *_dp)
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{
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uchar *dp = _dp;
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int i;
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for (i = s; i < s + n; i++) {
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int r, g, b;
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vga_getpalette(i, &r, &g, &b);
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*(dp++) = (unsigned char) r;
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*(dp++) = (unsigned char) g;
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*(dp++) = (unsigned char) b;
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}
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}
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void gl_getpalette(void *p)
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{
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gl_getpalettecolors(0, 256, p);
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}
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void gl_setpalette(void *p)
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{
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gl_setpalettecolors(0, 256, p);
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}
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void gl_setrgbpalette()
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{
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int i;
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Palette pal;
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for (i = 0; i < 256; i++) {
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pal.color[i].blue = (i & 7) * (64 / 8); /* 3 bits */
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pal.color[i].green = ((i & 56) >> 3) * (64 / 8); /* 3 bits */
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pal.color[i].red = ((i & 192) >> 6) * (64 / 4); /* 2 bits */
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}
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gl_setpalette(&pal);
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}
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