resize method

  1. @override
void resize(
  1. Vector2 newCanvasSize
)
override

This configures the viewport with a new raw canvas size. It should immediately affect effectiveSize and canvasSize. This must be called by the engine at startup and also whenever the size changes.

Implementation

@override
void resize(Vector2 newCanvasSize) {
  canvasSize = newCanvasSize.clone();

  _scale = math.min(
    canvasSize!.x / effectiveSize.x,
    canvasSize!.y / effectiveSize.y,
  );

  _scaledSize
    ..setFrom(effectiveSize)
    ..scale(_scale);
  _resizeOffset
    ..setFrom(canvasSize!)
    ..sub(_scaledSize)
    ..scale(0.5);

  _clipRect = _resizeOffset & _scaledSize;

  _transform.setIdentity();
  _transform.translate(_resizeOffset.x, _resizeOffset.y);
  _transform.scale(_scale, _scale, 1);
}