public static unsafe void Clamp(this Bitmap bmp, ColorPalette palette)
{
int w = bmp.Width, h = bmp.Height, e = palette.Entries.Length;
BitmapData data = bmp.LockBits(new Rectangle(0, 0, w, h), ImageLockMode.ReadWrite, PixelFormat.Format32bppArgb);
for (ARGBPixel *ptr = (ARGBPixel *)data.Scan0, ceil = ptr + (w * h); ptr < ceil;)
{
*ptr = (ARGBPixel)palette.Entries[palette.FindMatch(*ptr++)];
//ARGBPixel p = *ptr;
//int bestDist = Int32.MaxValue, bestIndex = 0;
//for(int i = 0 ; i < e ; i++)
//{
// int dist = p.DistanceTo(palette.Entries[i]);
// if(dist < bestDist)
// {
// bestDist = dist;
// bestIndex = i;
// if (dist == 0) break;
// }
//}
//*ptr++ = (ARGBPixel)palette.Entries[bestIndex];
}
bmp.UnlockBits(data);
}