System.Windows.Forms.XplatUICarbon.SetIcon C# (CSharp) Method

		internal override void SetIcon(IntPtr handle, Icon icon) {
			Hwnd hwnd = Hwnd.ObjectFromHandle (handle);

			// FIXME: we need to map the icon for active window switches
			if (WindowMapping [hwnd.Handle] != null) {
				if (icon == null) { 
					RestoreApplicationDockTileImage ();
				} else {
					Bitmap		bitmap;
					int		size;
					IntPtr[]	data;
					int		index;
	
					bitmap = new Bitmap (128, 128);
					using (Graphics g = Graphics.FromImage (bitmap)) {
						g.DrawImage (icon.ToBitmap (), 0, 0, 128, 128);
					}
					index = 0;
					size = bitmap.Width * bitmap.Height;
					data = new IntPtr[size];
	
					for (int y = 0; y < bitmap.Height; y++) {
						for (int x = 0; x < bitmap.Width; x++) {
							int pixel = bitmap.GetPixel (x, y).ToArgb ();
							if (BitConverter.IsLittleEndian) {
								byte a = (byte) ((pixel >> 24) & 0xFF);
								byte r = (byte) ((pixel >> 16) & 0xFF);
								byte g = (byte) ((pixel >> 8) & 0xFF);
								byte b = (byte) (pixel & 0xFF);
								data[index++] = (IntPtr)(a + (r << 8) + (g << 16) + (b << 24));
							} else {
								data[index++] = (IntPtr)pixel;
							}
						}
					}

					IntPtr provider = CGDataProviderCreateWithData (IntPtr.Zero, data, size*4, IntPtr.Zero);
					IntPtr image = CGImageCreate (128, 128, 8, 32, 4*128, CGColorSpaceCreateDeviceRGB (), 4, provider, IntPtr.Zero, 0, 0);
					SetApplicationDockTileImage (image);
				}
			}
		}