public unsafe static Bitmap QuantizeImage(Bitmap Image, int Colors)
{
byte[] BitmapArray = MakeBitmapArray(Image);
var attr = Liq.liq_attr_create();
Liq.liq_set_max_colors(attr, Colors);
Liq.liq_set_min_posterization(attr, 2);
var LiqImage = Liq.liq_image_create_rgba(attr, BitmapArray, Image.Width, Image.Height, 0);
var LiqQuantized = Liq.liq_quantize_image(attr, LiqImage);
byte[] Texture = new byte[Image.Width * Image.Height];
Liq.liq_write_remapped_image(LiqQuantized, LiqImage, Texture, (UIntPtr)(Image.Width * Image.Height));
liq_palette LiqPalette = (liq_palette)Marshal.PtrToStructure(Liq.liq_get_palette(LiqQuantized), typeof(liq_palette));
Bitmap BMP;
fixed(byte *p = Texture)
{
IntPtr ptr = (IntPtr)p;
BMP = new Bitmap(Image.Width, Image.Height, Image.Width, System.Drawing.Imaging.PixelFormat.Format8bppIndexed, ptr);
}
System.Drawing.Imaging.ColorPalette pal = BMP.Palette;
for (int i = 0; i < BMP.Palette.Entries.Count(); i++)
{
pal.Entries[i] = Color.FromArgb(LiqPalette.Entries[i].A, LiqPalette.Entries[i].R, LiqPalette.Entries[i].G, LiqPalette.Entries[i].B);
}
BMP.Palette = pal;
return(BMP);
}
public static PalettedImage CreatePalettedImage(Bitmap Image, int Format)
{
byte[] BitmapArray = MakeBitmapArray(Image);
var attr = Liq.liq_attr_create();
Liq.liq_set_max_colors(attr, GetColorNum(Format));
Liq.liq_set_min_posterization(attr, 2);
var LiqImage = Liq.liq_image_create_rgba(attr, BitmapArray, Image.Width, Image.Height, 0);
var LiqQuantized = Liq.liq_quantize_image(attr, LiqImage);
byte[] Texture = new byte[Image.Width * Image.Height];
Liq.liq_write_remapped_image(LiqQuantized, LiqImage, Texture, (UIntPtr)(Image.Width * Image.Height));
liq_palette LiqPalette = (liq_palette)Marshal.PtrToStructure(Liq.liq_get_palette(LiqQuantized), typeof(liq_palette));
return(new PalettedImage(Texture, LiqPalette));
}