public static Bitmap GetTransformedImage(WorkerData workerData)
{
Color[] pixelData;
Size size;
IPixelTransform transform;
IErrorDiffusion dither;
transform = workerData.Transform;
dither = workerData.Dither;
using (Bitmap image = workerData.Image)
{
size = image.Size;
pixelData = ImageProcessor.GetBitmapColors(image); //image.GetPixelsFrom32BitArgbImage();
}
if (dither != null && dither.Prescan)
{
// perform the dithering on the source data before
// it is transformed
ProcessPixels(pixelData, size, null, dither, workerData);
dither = null;
}
// scan each pixel, apply a transform the pixel
// and then dither it
ProcessPixels(pixelData, size, transform, dither, workerData);
// create the final bitmap
return(ImageProcessor.GetBitmapFromArray(pixelData, size));//pixelData.ToBitmap(size);
}
public static void ProcessPixels(Color[] pixelData, Size size, IPixelTransform pixelTransform, IErrorDiffusion dither, WorkerData bw = null)
{
Color current;
Color transformed;
int index = 0;
for (int row = 0; row < size.Height; row++)
{
for (int col = 0; col < size.Width; col++)
{
if (bw != null && bw.Worker.CancellationPending == true)
{
bw.Args.Cancel = true;
return;
}
current = pixelData[index];
if (pixelTransform != null)
{
transformed = pixelTransform.Transform(current);
pixelData[index] = transformed;
}
else
{
transformed = current;
}
index++;
// apply a dither algorithm to this pixel
// assuming it wasn't done before
dither?.Diffuse(pixelData, current, transformed, col, row, size.Width, size.Height);
}
}
}