public static (byte[] indexedData, uint[] palette) QuantizeImage(int[] imageData, int maxColors)
{
WuQuantizer quantizer = new WuQuantizer();
quantizer.BuildHistogram(imageData);
quantizer.CalculateCumulativeMoments();
var boxes = quantizer.SplitData(maxColors);
var palette = quantizer.BuildPalette(boxes).ToArray();
var fullPalette = new uint[256];
Array.Copy(palette, fullPalette, palette.Length);
return(LookupPixels(imageData, palette), fullPalette);
}
private void WriteIndexedPixels(Binary binary)
{
(byte[] indexedData, uint[] palette) = WuQuantizer.QuantizeImage(PixelData, 0x100);
Order order = new Order(Width, Height);
for (int n = 0; n < Width * Height; n++)
{
int x, y;
(x, y) = order.GetXY();
byte b = indexedData[y * Stride + x];
binary.WriteByte(b);
}
for (int i = 0; i < 0x100; i++)
{
binary.WriteByte((byte)((palette[i] & 0xFF000000) >> 24));
binary.WriteByte((byte)((palette[i] & 0x000000FF) >> 0));
binary.WriteByte((byte)((palette[i] & 0x0000FF00) >> 8));
binary.WriteByte((byte)((palette[i] & 0x00FF0000) >> 16));
}
}
