/* bestfit_color:
* Searches a palette for the color closest to the requested R, G, B value.
*/
int bestfit_color(PALLETE pal, int r, int g, int b)
{
int i, coldiff, lowest, bestfit;
if (col_diff[1] == 0)
bestfit_init();
bestfit = 0;
lowest = INT_MAX;
if ((r == 63) && (g == 0) && (b == 63))
i = 0;
else
i = 1;
while (i<PAL_SIZE) {
RGB *rgb = &pal[i];
coldiff = (col_diff + 0) [ (rgb->g - g) & 0x7F ];
if (coldiff < lowest) {
coldiff += (col_diff + 128) [ (rgb->r - r) & 0x7F ];
if (coldiff < lowest) {
coldiff += (col_diff + 256) [ (rgb->b - b) & 0x7F ];
if (coldiff < lowest) {
bestfit = rgb - pal; /* faster than `bestfit = i;' */
if (coldiff == 0)
return bestfit;
lowest = coldiff;
}
}
}
i++;
}
return bestfit;
}
/* bestfit_color:
* Searches a palette for the color closest to the requested R, G, B value.
*/
int bestfit_color(AL_CONST PALETTE pal, int r, int g, int b)
{
int i, coldiff, lowest, bestfit;
ASSERT(r >= 0 && r <= 63);
ASSERT(g >= 0 && g <= 63);
ASSERT(b >= 0 && b <= 63);
if (col_diff[1] == 0)
bestfit_init();
bestfit = 0;
lowest = INT_MAX;
/* only the transparent (pink) color can be mapped to index 0 */
if ((r == 63) && (g == 0) && (b == 63))
i = 0;
else
i = 1;
while (i<PAL_SIZE) {
AL_CONST RGB *rgb = &pal[i];
coldiff = (col_diff + 0) [ (rgb->g - g) & 0x7F ];
if (coldiff < lowest) {
coldiff += (col_diff + 128) [ (rgb->r - r) & 0x7F ];
if (coldiff < lowest) {
coldiff += (col_diff + 256) [ (rgb->b - b) & 0x7F ];
if (coldiff < lowest) {
bestfit = rgb - pal; /* faster than `bestfit = i;' */
if (coldiff == 0)
return bestfit;
lowest = coldiff;
}
}
}
i++;
}
return bestfit;
}
