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/*
* CLUT manipulation
*
* (C) Copyright 2001-2002 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.
*/
#include <string.h>
#include "types.h"
#include "visual.h"
#include "util.h"
/*
* Monochrome
*/
const rgba_t clut_mono[2] = {
{ 0x0000, 0x0000, 0x0000, 0xffff },
{ 0xffff, 0xffff, 0xffff, 0xffff }
};
/*
* Linux console palette
*/
const rgba_t clut_console[16] = {
{ 0x0000, 0x0000, 0x0000, 0xffff },
{ 0x0000, 0x0000, 0xaaaa, 0xffff },
{ 0x0000, 0xaaaa, 0x0000, 0xffff },
{ 0x0000, 0xaaaa, 0xaaaa, 0xffff },
{ 0xaaaa, 0x0000, 0x0000, 0xffff },
{ 0xaaaa, 0x0000, 0xaaaa, 0xffff },
{ 0xaaaa, 0x5555, 0x0000, 0xffff },
{ 0xaaaa, 0xaaaa, 0xaaaa, 0xffff },
{ 0x5555, 0x5555, 0x5555, 0xffff },
{ 0x5555, 0x5555, 0xffff, 0xffff },
{ 0x5555, 0xffff, 0x5555, 0xffff },
{ 0x5555, 0xffff, 0xffff, 0xffff },
{ 0xffff, 0x5555, 0x5555, 0xffff },
{ 0xffff, 0x5555, 0xffff, 0xffff },
{ 0xffff, 0xffff, 0x5555, 0xffff },
{ 0xffff, 0xffff, 0xffff, 0xffff }
};
/*
* VGA palette
*/
const rgba_t clut_vga[16] = {
{ 0x0000, 0x0000, 0x0000, 0xffff },
{ 0x8080, 0x0000, 0x0000, 0xffff },
{ 0x0000, 0x8080, 0x0000, 0xffff },
{ 0x8080, 0x8080, 0x0000, 0xffff },
{ 0x0000, 0x0000, 0x8080, 0xffff },
{ 0x8080, 0x0000, 0x8080, 0xffff },
{ 0x0000, 0x8080, 0x8080, 0xffff },
{ 0xc0c0, 0xc0c0, 0xc0c0, 0xffff },
{ 0x8080, 0x8080, 0x8080, 0xffff },
{ 0xffff, 0x0000, 0x0000, 0xffff },
{ 0x0000, 0xffff, 0x0000, 0xffff },
{ 0xffff, 0xffff, 0x0000, 0xffff },
{ 0x0000, 0x0000, 0xffff, 0xffff },
{ 0xffff, 0x0000, 0xffff, 0xffff },
{ 0x0000, 0xffff, 0xffff, 0xffff },
{ 0xffff, 0xffff, 0xffff, 0xffff },
};
/*
* 4 Extra Windows colors
*/
const rgba_t clut_windows[4] = {
{ 0xc0c0, 0xdcdc, 0xc0c0, 0xffff },
{ 0xa6a6, 0xcaca, 0xf0f0, 0xffff },
{ 0xffff, 0xfbfb, 0xf0f0, 0xffff },
{ 0xa0a0, 0xa0a0, 0xa4a4, 0xffff },
};
/*
* Create a color cube
*/
void clut_create_rgbcube(rgba_t *clut, u32 rlen, u32 glen, u32 blen)
{
u32 r, g, b;
u16 red, green, blue;
Debug("clut_create_rgbcube(): RGB %dx%dx%d\n", rlen, glen, blen);
for (r = 0; r < rlen; r++) {
red = EXPAND_TO_16BIT(r, rlen-1);
for (g = 0; g < glen; g++) {
green = EXPAND_TO_16BIT(g, glen-1);
for (b = 0; b < blen; b++) {
blue = EXPAND_TO_16BIT(b, blen-1);
clut->r = red;
clut->g = green;
clut->b = blue;
clut->a = 0xffff;
clut++;
}
}
}
}
/*
* Create a linear ramp
*/
void clut_create_linear(rgba_t *clut, u32 len)
{
u32 i;
u16 gray;
Debug("clut_create_linear(): GRAY %d\n", len);
for (i = 0; i < len; i++) {
gray = EXPAND_TO_16BIT(i, len-1);
clut->r = gray;
clut->g = gray;
clut->b = gray;
clut->a = 0xffff;
clut++;
}
}
/*
* Create a `useful' palette
*/
void clut_init_nice(void)
{
if (idx_len >= 512) {
clut_create_rgbcube(clut, 8, 8, 8);
} else if (idx_len >= 256) {
memcpy(clut, clut_console, sizeof(clut_console));
/* FIXME: skip colors that are already present */
clut_create_rgbcube(clut+16, 6, 6, 6);
/* FIXME: skip colors that are already present */
clut_create_linear(clut+232, 24);
} else if (idx_len >= 128) {
memcpy(clut, clut_console, sizeof(clut_console));
/* FIXME: skip colors that are already present */
clut_create_rgbcube(clut+16, 4, 4, 4);
/* FIXME: skip colors that are already present */
clut_create_linear(clut+80, 48);
} else if (idx_len >= 64) {
clut_create_rgbcube(clut, 4, 4, 4);
} else if (idx_len >= 32) {
clut_create_rgbcube(clut, 3, 3, 3);
/* FIXME: still 3 entries left */
} else if (idx_len >= 16) {
memcpy(clut, clut_console, sizeof(clut_console));
} else if (idx_len >= 8) {
memcpy(clut, clut_console, 8*sizeof(rgba_t));
} else if (idx_len >= 4) {
clut_create_linear(clut, 4);
} else if (idx_len >= 2) {
memcpy(clut, clut_mono, sizeof(clut_mono));
}
clut_update();
}
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