Implement ClipRSuperellipse on backdrop filter #179125
Description
#177551 propagates all clips to the mutator stack , but the kBackdropClipRse case currently no-ops
The PlatformViewsController should be updated to implement the kBackdropClipRse case
For this snippet:
Widget build(BuildContext context) {
return ClipRSuperellipse(
borderRadius: BorderRadius.circular(50),
child: Container(
width: 200,
height: 200,
decoration: BoxDecoration(
color: Colors.black.withOpacity(0.2),
borderRadius: BorderRadius.circular(500),
),
child: BackdropFilter(
filter: ImageFilter.blur(sigmaX: 10.0, sigmaY: 10.0),
child: const Center(
child: Text('Blurred block 1'),
),
),
),
);
}The correct behaviour should clip the blur in the RSE shape but currently it produces, wherein the clip is completely ignored
This is because in the rse case we are simply no-oping. The native code to handle this case needs to be implemented