/*****************************************************************************\
image:SetPalette
\*****************************************************************************/
static int imluaImageSetPalette (lua_State *L)
{
imImage *image = imlua_checkimage(L, 1);
imluaPalette *pal = imlua_checkpalette(L, 2);
long* palette = (long*)malloc(sizeof(long)*256);
memcpy(palette, pal->color, pal->count*sizeof(long));
imImageSetPalette(image, palette, pal->count);
return 0;
}
void imProcessSplitHSI(const imImage* src_image, imImage* dst_image1, imImage* dst_image2, imImage* dst_image3)
{
switch(src_image->data_type)
{
case IM_BYTE:
DoSplitHSIByte((imbyte**)src_image->data, (float*)dst_image1->data[0], (float*)dst_image2->data[0], (float*)dst_image3->data[0], src_image->count);
break;
case IM_FLOAT:
DoSplitHSIFloat((float**)src_image->data, (float*)dst_image1->data[0], (float*)dst_image2->data[0], (float*)dst_image3->data[0], src_image->count);
break;
}
imImageSetPalette(dst_image1, imPaletteHues(), 256);
}
void imProcessQuantizeRGBUniform(const imImage* src_image, imImage* dst_image, int dither)
{
imbyte *dst_map=(imbyte*)dst_image->data[0],
*red_map=(imbyte*)src_image->data[0],
*green_map=(imbyte*)src_image->data[1],
*blue_map=(imbyte*)src_image->data[2];
imImageSetPalette(dst_image, imPaletteUniform(), 256);
for (int y = 0; y < src_image->height; y++)
{
for (int x = 0; x < src_image->width; x++)
{
if (dither)
*dst_map++ = (imbyte)imPaletteUniformIndexHalftoned(imColorEncode(*red_map++, *green_map++, *blue_map++), x, y);
else
*dst_map++ = (imbyte)imPaletteUniformIndex(imColorEncode(*red_map++, *green_map++, *blue_map++));
}
}
}
