clipRect method

void clipRect (Rect rect, { ClipOp clipOp: ClipOp.intersect, bool doAntiAlias: true })

Reduces the clip region to the intersection of the current clip and the given rectangle.

If doAntiAlias is true, then the clip will be anti-aliased.

If multiple draw commands intersect with the clip boundary, this can result in incorrect blending at the clip boundary. See saveLayer for a discussion of how to address that.

Use ClipOp.difference to subtract the provided rectangle from the current clip.

Implementation 

void clipRect(Rect rect, { ClipOp clipOp: ClipOp.intersect, bool doAntiAlias = true }) {
  assert(_rectIsValid(rect));
  assert(clipOp != null);
  assert(doAntiAlias != null);
  _clipRect(rect.left, rect.top, rect.right, rect.bottom, clipOp.index, doAntiAlias);
}