public void Quantize(IColorQuantizer quantizer, int colorCount)
{
if (Disposed)
{
return;
}
int myWidth = Width;
int myHeight = Height;
Color *colors = GetColors();
quantizer.Prepare(this);
bool usesAlpha = false;
// weird stuff to make the quantizer work with alpha
Color lastColor = new Color(255, 255, 255, 0);
bool firstColorFound = false;
for (int y = 0; y < myHeight; y++)
{
for (int x = 0; x < myWidth; x++)
{
int idx = x + y * myWidth;
var col = *(colors + idx);
if (col.A > 128)
{
col.A = 255;
(*(colors + x + y * myWidth)) = col;
if (!firstColorFound && usesAlpha)
{
for (int i = 0; i < idx; i++)
{
quantizer.AddColor(col, i % myWidth, Mathf.FloorToInt(i / myWidth));
}
}
firstColorFound = true;
lastColor = col;
quantizer.AddColor(col, x, y);
}
else
{
col = new Color(255, 255, 255, 0);
(*(colors + x + y * myWidth)) = col;
usesAlpha = true;
if (firstColorFound)
{
quantizer.AddColor(lastColor, x, y);
}
}
}
}
var palette = quantizer.GetPalette(colorCount);
for (int y = 0; y < myHeight; y++)
{
for (int x = 0; x < myWidth; x++)
{
if ((*(colors + x + y * myWidth)).A == 255)
{
int index = quantizer.GetPaletteIndex(*(colors + x + y * myWidth), x, y);
//Debug.Log(index);
*(colors + x + y * myWidth) = palette[index];
}
}
}
quantizer.Finish();
}
public void Quantize(ImageBuffer target, IColorQuantizer quantizer, IColorDitherer ditherer, Int32 colorCount, Int32 parallelTaskCount = 4)
{
// checks parameters
Guard.CheckNull(target, "target");
Guard.CheckNull(quantizer, "quantizer");
// initializes quantization parameters
Boolean isTargetIndexed = target.PixelFormat.IsIndexed();
// step 1 - prepares the palettes
List<Color> targetPalette = isTargetIndexed ? SynthetizePalette(quantizer, colorCount, parallelTaskCount) : null;
// step 2 - updates the bitmap palette
target.bitmap.SetPalette(targetPalette);
target.UpdatePalette(true);
// step 3 - prepares ditherer (optional)
if (ditherer != null) ditherer.Prepare(quantizer, colorCount, this, target);
// step 4 - prepares the quantization function
TransformPixelFunction quantize = (sourcePixel, targetPixel) =>
{
// reads the pixel color
Color color = GetColorFromPixel(sourcePixel);
// converts alpha to solid color
color = QuantizationHelper.ConvertAlpha(color);
// quantizes the pixel
SetColorToPixel(targetPixel, color, quantizer);
// marks pixel as processed by default
Boolean result = true;
// preforms inplace dithering (optional)
if (ditherer != null && ditherer.IsInplace)
{
result = ditherer.ProcessPixel(sourcePixel, targetPixel);
}
// returns the result
return result;
};
// step 5 - generates the target image
IList<Point> path = quantizer.GetPointPath(Width, Height);
TransformPerPixel(target, path, quantize, parallelTaskCount);
// step 6 - preforms non-inplace dithering (optional)
if (ditherer != null && !ditherer.IsInplace)
{
Dither(target, ditherer, quantizer, colorCount, 1);
}
// step 7 - finishes the dithering (optional)
if (ditherer != null) ditherer.Finish();
// step 8 - clean-up
quantizer.Finish();
}
public void Quantize(ImageBuffer target, IColorQuantizer quantizer, IColorDitherer ditherer, Int32 colorCount, Int32 parallelTaskCount = 4)
{
// checks parameters
Guard.CheckNull(target, "target");
Guard.CheckNull(quantizer, "quantizer");
// initializes quantization parameters
Boolean isTargetIndexed = target.PixelFormat.IsIndexed();
// step 1 - prepares the palettes
List <Color> targetPalette = isTargetIndexed ? SynthetizePalette(quantizer, colorCount, parallelTaskCount) : null;
// step 2 - updates the bitmap palette
target.bitmap.SetPalette(targetPalette);
target.UpdatePalette(true);
// step 3 - prepares ditherer (optional)
if (ditherer != null)
{
ditherer.Prepare(quantizer, colorCount, this, target);
}
// step 4 - prepares the quantization function
TransformPixelFunction quantize = (sourcePixel, targetPixel) =>
{
// reads the pixel color
Color color = GetColorFromPixel(sourcePixel);
// converts alpha to solid color
color = QuantizationHelper.ConvertAlpha(color);
// quantizes the pixel
SetColorToPixel(targetPixel, color, quantizer);
// marks pixel as processed by default
Boolean result = true;
// preforms inplace dithering (optional)
if (ditherer != null && ditherer.IsInplace)
{
result = ditherer.ProcessPixel(sourcePixel, targetPixel);
}
// returns the result
return(result);
};
// step 5 - generates the target image
IList <Point> path = quantizer.GetPointPath(Width, Height);
TransformPerPixel(target, path, quantize, parallelTaskCount);
// step 6 - preforms non-inplace dithering (optional)
if (ditherer != null && !ditherer.IsInplace)
{
Dither(target, ditherer, quantizer, colorCount, 1);
}
// step 7 - finishes the dithering (optional)
if (ditherer != null)
{
ditherer.Finish();
}
// step 8 - clean-up
quantizer.Finish();
}
