public static Bitmap GetTransformedImage(WorkerData workerData)
{
ArgbColor[] pixelData;
Size size;
IPixelTransform transform;
IErrorDiffusion dither;
transform = workerData.Transform;
dither = workerData.Dither;
using (Bitmap image = workerData.Image)
{
size = image.Size;
pixelData = image.GetPixelsFrom32BitArgbImage();
}
if (dither != null && dither.Prescan)
{
// perform the dithering on the source data before
// it is transformed
ProcessPixels(pixelData, size, null, dither);
dither = null;
}
// scan each pixel, apply a transform the pixel
// and then dither it
ProcessPixels(pixelData, size, transform, dither);
// create the final bitmap
return(pixelData.ToBitmap(size));
}
public static Bitmap RequestImageTransform(Bitmap image, IPixelTransform transform, IErrorDiffusion ditherer)
{
WorkerData workerData;
if (image.PixelFormat != System.Drawing.Imaging.PixelFormat.Format32bppArgb)
{
using (Bitmap tmp = image)
{
image = tmp.Copy();
}
}
workerData = new WorkerData
{
Image = image,
Transform = transform,
Dither = ditherer
};
return(backgroundWorker_RunWorkerCompleted(null, new RunWorkerCompletedEventArgs(GetTransformedImage(workerData), null, false)));
}
