private void RequestImageTransform()
{
if (_image != null && !backgroundWorker.IsBusy)
{
WorkerData workerData;
IPixelTransform transform;
IErrorDiffusion ditherer;
Bitmap image;
statusToolStripStatusLabel.Text = "Running image transform...";
Cursor.Current = Cursors.WaitCursor;
this.UseWaitCursor = true;
transform = this.GetPixelTransform();
ditherer = this.GetDitheringInstance();
image = _image.Copy();
workerData = new WorkerData
{
Image = image,
Transform = transform,
Dither = ditherer,
ColorCount = this.GetMaximumColorCount()
};
#if USEWORKER
backgroundWorker.RunWorkerAsync(workerData);
#else
backgroundWorker_RunWorkerCompleted(backgroundWorker, new RunWorkerCompletedEventArgs(this.GetTransformedImage(workerData), null, false));
#endif
}
}
private Bitmap GetTransformedImage(WorkerData workerData)
{
Bitmap image;
Bitmap result;
ArgbColor[] pixelData;
Size size;
IPixelTransform transform;
IErrorDiffusion dither;
transform = workerData.Transform;
dither = workerData.Dither;
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
this.ProcessPixels(pixelData, size, null, dither);
dither = null;
}
// scan each pixel, apply a transform the pixel
// and then dither it
this.ProcessPixels(pixelData, size, transform, dither);
// create the final bitmap
result = pixelData.ToBitmap(size);
return(result);
}