createImage method

Future<Image> createImage([ bool adjustOffset = true, double resolution = 1, GRect? rect ])

Creates an image representation of the current state of the GDisplayObject. If adjustOffset is true, the resulting image will be offset so that its top-left corner corresponds to the top-left corner of the current bounds. If resolution is provided and is different than 1, the image will be scaled by this factor before being returned. If rect is provided, it defines a rectangle that will be used as the bounds for the image instead of the getFilterBounds of the GDisplayObject. Returns a Future that resolves to a ui.Image representing the current state of the GDisplayObject in the form of an image.

Implementation

Future<ui.Image> createImage([
  bool adjustOffset = true,
  double resolution = 1,
  GRect? rect,
]) async {
  rect ??= getFilterBounds(); //getBounds($parent);
  rect = rect!.clone();
  if (resolution != 1) {
    rect *= resolution;
  }
  final needsAdjust =
      (rect.left != 0 || rect.top != 0) && adjustOffset || resolution != 1;
  late ui.Picture picture;
  if (needsAdjust) {
    picture = createPicture((canvas) {
      if (adjustOffset) canvas.translate(-rect!.left, -rect.top);
      if (resolution != 1) canvas.scale(resolution);
    }, (canvas) {
      if (adjustOffset) canvas.restore();
      if (resolution != 1) canvas.restore();
    });
  } else {
    picture = createPicture();
  }
  final width = adjustOffset ? rect.width.toInt() : rect.right.toInt();
  final height = adjustOffset ? rect.height.toInt() : rect.bottom.toInt();
  final output = await picture.toImage(width, height);
  picture.dispose();
  return output;
}