System.Windows.Forms.XplatUIX11.DefineStdCursorBitmap C# (CSharp) Method

		internal override Bitmap DefineStdCursorBitmap (StdCursor id) {
			CursorFontShape	shape;
			string name;
			IntPtr theme;
			int size;
			Bitmap bmp = null;
			
			try {
				shape = StdCursorToFontShape (id);
				name = shape.ToString ().Replace ("XC_", string.Empty);
				size = XcursorGetDefaultSize (DisplayHandle);
				theme = XcursorGetTheme (DisplayHandle);
				IntPtr images_ptr = XcursorLibraryLoadImages (name, theme, size);
#if debug
				Console.WriteLine ("DefineStdCursorBitmap, id={0}, #id={1}, name{2}, size={3}, theme: {4}, images_ptr={5}", id, (int) id, name, size, Marshal.PtrToStringAnsi (theme), images_ptr);
#endif

				if (images_ptr == IntPtr.Zero) {
					return null;
				}

				XcursorImages images = (XcursorImages) Marshal.PtrToStructure (images_ptr, typeof (XcursorImages));
#if debug
				Console.WriteLine ("DefineStdCursorBitmap, cursor has {0} images", images.nimage);
#endif

				if (images.nimage > 0) {			
					// We only care about the first image.
					XcursorImage image = (XcursorImage)Marshal.PtrToStructure (Marshal.ReadIntPtr (images.images), typeof (XcursorImage));
					
#if debug
					Console.WriteLine ("DefineStdCursorBitmap, loaded image <size={0}, height={1}, width={2}, xhot={3}, yhot={4}, pixels={5}", image.size, image.height, image.width, image.xhot, image.yhot, image.pixels);
#endif
					// A sanity check
					if (image.width <= short.MaxValue && image.height <= short.MaxValue) {
						int [] pixels = new int [image.width * image.height];
						Marshal.Copy (image.pixels, pixels, 0, pixels.Length);
						bmp = new Bitmap (image.width, image.height);
						for (int w = 0; w < image.width; w++) {
							for (int h = 0; h < image.height; h++) {
								bmp.SetPixel (w, h, Color.FromArgb (pixels [h * image.width + w]));
							}
						}
					}
				}
				
				XcursorImagesDestroy (images_ptr);
				
			} catch (DllNotFoundException ex) {
				Console.WriteLine ("Could not load libXcursor: " + ex.Message + " (" + ex.GetType ().Name + ")");
				return null;
			}
			
			return bmp;
		}