anchor.diff:        ..layout(const ui.ParagraphConstraints(width: 60.0));
       canvas.drawParagraph(paragraph, const ui.Offset(20.0, 20.0));
   
  -
       // Construct an image for drawImage related operations
  -    const int imageWidth = 40;
  -    const int imageHeight = 40;
  +    const int imageWidth = 10;
  +    const int imageHeight = 10;
       final Uint8List pixels = Uint8List.fromList(List<int>.generate(
         imageWidth * imageHeight * 4,
             (int i) => i % 4 < 2 ? 0x00 : 0xFF,  // opaque blue
  
positive.code:   /// Trigger draw operations on a given canvas to warm up GPU shader
    /// compilation cache.
    ///
    /// Parameter [image] is to be used for drawImage related operations.
    ///
    /// To decide which draw operations to be added to your custom warm up
    /// process, try capture an skp using `flutter screenshot --observatory-
    /// port=<port> --type=skia` and analyze it with https://debugger.skia.org.
  
negative.code:       final ui.Rect srcRect = ui.Rect.fromLTWH(0.0, 0.0, image.width.toDouble(), image.height.toDouble());
        canvas.drawImage(image, const ui.Offset(20.0, 20.0), ui.Paint());
        canvas.translate(80.0, 0.0);
        canvas.drawImageRect(image, srcRect, ui.Rect.fromLTWH(20.0, 20.0, imageWidth * 0.6, imageWidth * 0.6), paints[0]);
        canvas.translate(80.0, 0.0);
        canvas.drawImageRect(image, srcRect, ui.Rect.fromLTWH(10.0, 10.0, imageWidth * 1.5, imageWidth * 1.5), paints[0]);
        canvas.restore();
        completer.complete();
      });
  