copy ROI from one image and copy to on another image in wpf

Question

I want to develop a function with the following signature:

 CopyImage(ImageSource inputImage, Point inTopLeft, Point InBottomRight, ImageSource outputImage, Poin         


        

Answer 1

Your method could look like this:

private BitmapSource CopyRegion(
    BitmapSource sourceBitmap, Int32Rect sourceRect,
    BitmapSource targetBitmap, int targetX, int targetY)
{
    if (sourceBitmap.Format != targetBitmap.Format)
    {
        throw new ArgumentException(
            "Source and target bitmap must have the same PixelFormat.");
    }

    var bytesPerPixel = (sourceBitmap.Format.BitsPerPixel + 7) / 8;
    var stride = bytesPerPixel * sourceRect.Width;
    var pixelBuffer = new byte[stride * sourceRect.Height];
    sourceBitmap.CopyPixels(sourceRect, pixelBuffer, stride, 0);

    var outputBitmap = new WriteableBitmap(targetBitmap);
    sourceRect.X = targetX;
    sourceRect.Y = targetY;
    outputBitmap.WritePixels(sourceRect, pixelBuffer, stride, 0);

    return outputBitmap;
}