CairoExplorer.FileToIconConverter.copyBitmap C# (CSharp) Метод

        private static void copyBitmap(BitmapSource source, WriteableBitmap target, bool dispatcher)
        {
            int width = source.PixelWidth;
            int height = source.PixelHeight;
            int stride = width * ((source.Format.BitsPerPixel + 7) / 8);

            byte[] bits = new byte[height * stride];
            source.CopyPixels(bits, stride, 0);
            source = null;

            //original code.
            //writeBitmap.Dispatcher.Invoke(DispatcherPriority.Background,
            //    new ThreadStart(delegate
            //    {
            //        //UI Thread
            //        Int32Rect outRect = new Int32Rect(0, (int)(writeBitmap.Height - height) / 2, width, height);                    
            //        writeBitmap.WritePixels(outRect, bits, stride, 0);                                        
            //    }));

            //Bugfixes by h32

            if (dispatcher)
            {
                target.Dispatcher.BeginInvoke(DispatcherPriority.Background,
                new ThreadStart(delegate
                {
                    //UI Thread
                    var delta = target.Height - height;
                    var newWidth = width > target.Width ? (int)target.Width : width;
                    var newHeight = height > target.Height ? (int)target.Height : height;
                    Int32Rect outRect = new Int32Rect(0, (int)(delta >= 0 ? delta : 0) / 2, newWidth, newWidth);
                    try
                    {
                        target.WritePixels(outRect, bits, stride, 0);
                    }
                    catch (Exception)
                    {
                        System.Diagnostics.Debugger.Break();
                    }
                }));
            }
            else
            {
                var delta = target.Height - height;
                var newWidth = width > target.Width ? (int)target.Width : width;
                var newHeight = height > target.Height ? (int)target.Height : height;
                Int32Rect outRect = new Int32Rect(0, (int)(delta >= 0 ? delta : 0) / 2, newWidth, newWidth);
                try
                {
                    target.WritePixels(outRect, bits, stride, 0);
                }
                catch (Exception)
                {
                    System.Diagnostics.Debugger.Break();
                }
            }
        }