public IEnumerable <int> Process(IEnumerable <Color> colors)
{
if (_quantizer == null)
{
throw new ArgumentNullException(nameof(_quantizer));
}
if (ErrorFactorMatrix == null)
{
throw new ArgumentNullException(nameof(ErrorFactorMatrix));
}
var colorList = colors.ToArray();
_quantizer.CreatePalette(colorList);
var indices = new int[colorList.Length];
var errorComponents = new ColorComponentError[colorList.Length];
for (int i = 0; i < errorComponents.Length; i++)
{
errorComponents[i] = new ColorComponentError(0, 0, 0);
}
var errors =
new ErrorDiffusionList <Color, ColorComponentError>(colorList, errorComponents)
.ToArray();
ParallelProcessing.ProcessList(
errors, indices, _width,
MatrixSideWidth + 1, _quantizer.TaskCount, ProcessingAction);
return(indices);
}
public IEnumerable <int> Process(IEnumerable <Color> colors)
{
var colorList = colors.ToArray();
_quantizer.CreatePalette(colorList);
var processingAction = new Action <LineTask <Color[], int[]> >(taskModel =>
{
var matrixWidth = Matrix.GetLength(0);
var matrixHeight = Matrix.GetLength(1);
for (int i = taskModel.Start; i < taskModel.Start + taskModel.Length; i++)
{
int x = i % _width % matrixWidth;
int y = i / _width % matrixHeight;
int threshold = Convert.ToInt32(Matrix[x, y]);
var color = taskModel.Input[i];
int red = GetClampedValue(color.R + threshold, 0, 255);
int green = GetClampedValue(color.G + threshold, 0, 255);
int blue = GetClampedValue(color.B + threshold, 0, 255);
taskModel.Output[i] = _quantizer.GetPaletteIndex(Color.FromArgb(color.A, red, green, blue));
}
});
var indices = new int[colorList.Length];
ParallelProcessing.ProcessList(colorList, indices, processingAction, _quantizer.TaskCount);
return(indices);
}