public Image QuantizeImage(Bitmap image, int alphaThreshold, int alphaFader, int maxColorCount)
{
MaxColor = maxColorCount;
int colorCount = maxColorCount;
ColorData moments = QuantizerBase.CalculateMoments(QuantizerBase.BuildHistogram(image, alphaThreshold, alphaFader));
IEnumerable<Box> cubes = this.SplitData(ref colorCount, moments);
QuantizedPalette quantizedPalette = this.GetQuantizedPalette(colorCount, moments, cubes, alphaThreshold);
return (Image)QuantizerBase.ProcessImagePixels((Image)image, quantizedPalette);
}
private static CubeCut Maximize(
ColorData data,
Box cube,
int direction,
byte first,
byte last,
long wholeAlpha,
long wholeRed,
long wholeGreen,
long wholeBlue,
long wholeWeight)
{
long num1 = QuantizerBase.Bottom(cube, direction, data.MomentsAlpha);
long num2 = QuantizerBase.Bottom(cube, direction, data.MomentsRed);
long num3 = QuantizerBase.Bottom(cube, direction, data.MomentsGreen);
long num4 = QuantizerBase.Bottom(cube, direction, data.MomentsBlue);
long num5 = QuantizerBase.Bottom(cube, direction, data.Weights);
float result = 0.0f;
byte? cutPoint = new byte?();
for (byte index = first; (int)index < (int)last; ++index)
{
long num6 = num1 + QuantizerBase.Top(cube, direction, (int)index, data.MomentsAlpha);
long num7 = num2 + QuantizerBase.Top(cube, direction, (int)index, data.MomentsRed);
long num8 = num3 + QuantizerBase.Top(cube, direction, (int)index, data.MomentsGreen);
long num9 = num4 + QuantizerBase.Top(cube, direction, (int)index, data.MomentsBlue);
long num10 = num5 + QuantizerBase.Top(cube, direction, (int)index, data.Weights);
if (num10 != 0L)
{
long num11 = (num6 * num6 + num7 * num7 + num8 * num8 + num9 * num9) / num10;
long num12 = wholeAlpha - num6;
long num13 = wholeRed - num7;
long num14 = wholeGreen - num8;
long num15 = wholeBlue - num9;
long num16 = wholeWeight - num10;
if (num16 != 0L)
{
long num17 = num12 * num12 + num13 * num13 + num14 * num14 + num15 * num15;
long num18 = num11 + num17 / num16;
if ((double)num18 > (double)result)
{
result = (float)num18;
cutPoint = new byte?(index);
}
}
}
}
return(new CubeCut(cutPoint, result));
}
private bool Cut(ColorData data, ref Box first, ref Box second)
{
long wholeAlpha = QuantizerBase.Volume(first, data.MomentsAlpha);
long wholeRed = QuantizerBase.Volume(first, data.MomentsRed);
long wholeGreen = QuantizerBase.Volume(first, data.MomentsGreen);
long wholeBlue = QuantizerBase.Volume(first, data.MomentsBlue);
long wholeWeight = QuantizerBase.Volume(first, data.Weights);
CubeCut cubeCut1 = QuantizerBase.Maximize(data, first, 3, (byte)((uint)first.AlphaMinimum + 1U), first.AlphaMaximum, wholeAlpha, wholeRed, wholeGreen, wholeBlue, wholeWeight);
CubeCut cubeCut2 = QuantizerBase.Maximize(data, first, 2, (byte)((uint)first.RedMinimum + 1U), first.RedMaximum, wholeAlpha, wholeRed, wholeGreen, wholeBlue, wholeWeight);
CubeCut cubeCut3 = QuantizerBase.Maximize(data, first, 1, (byte)((uint)first.GreenMinimum + 1U), first.GreenMaximum, wholeAlpha, wholeRed, wholeGreen, wholeBlue, wholeWeight);
CubeCut cubeCut4 = QuantizerBase.Maximize(data, first, 0, (byte)((uint)first.BlueMinimum + 1U), first.BlueMaximum, wholeAlpha, wholeRed, wholeGreen, wholeBlue, wholeWeight);
int num1;
if ((double)cubeCut1.Value >= (double)cubeCut2.Value && (double)cubeCut1.Value >= (double)cubeCut3.Value && (double)cubeCut1.Value >= (double)cubeCut4.Value)
{
num1 = 3;
byte?position = cubeCut1.Position;
if (!(position.HasValue ? new int?((int)position.GetValueOrDefault()) : new int?()).HasValue)
{
return(false);
}
}
else
{
num1 = (double)cubeCut2.Value < (double)cubeCut1.Value || (double)cubeCut2.Value < (double)cubeCut3.Value || (double)cubeCut2.Value < (double)cubeCut4.Value ? ((double)cubeCut3.Value < (double)cubeCut1.Value || (double)cubeCut3.Value < (double)cubeCut2.Value || (double)cubeCut3.Value < (double)cubeCut4.Value ? 0 : 1) : 2;
}
second.AlphaMaximum = first.AlphaMaximum;
second.RedMaximum = first.RedMaximum;
second.GreenMaximum = first.GreenMaximum;
second.BlueMaximum = first.BlueMaximum;
switch (num1)
{
case 0:
ref Box local1 = ref second;
ref Box local2 = ref first;
byte? position1 = cubeCut4.Position;
int num2;
byte num3 = (byte)(num2 = (int)position1.Value);
local2.BlueMaximum = (byte)num2;
int num4 = (int)num3;
local1.BlueMinimum = (byte)num4;
second.AlphaMinimum = first.AlphaMinimum;
second.RedMinimum = first.RedMinimum;
second.GreenMinimum = first.GreenMinimum;
break;
public Bitmap QuantizeImage(Bitmap image, int alphaThreshold, int alphaFader, int maxColorCount)
{
if (image.PixelFormat != PixelFormat.Format32bppArgb)
{
image = image.ConvertToFormat32();
}
if (Program.DisableQuantization())
{
Console.WriteLine("[WARNING] By disabling quantization, only the first 255 unique colors will be taken into account");
return(image);
}
mMaxColor = maxColorCount + 1;
mMaxColor = Math.Min(mMaxColor, 256);
int colorCount = mMaxColor;
ColorData moments = QuantizerBase.CalculateMoments(QuantizerBase.BuildHistogram(image, alphaThreshold, alphaFader));
IEnumerable <Box> cubes = this.SplitData(ref colorCount, moments);
QuantizedPalette quantizedPalette = this.GetQuantizedPalette(colorCount, moments, cubes, alphaThreshold);
return(ProcessImagePixels((Image)image, quantizedPalette));
}
