Shadow not updated when Clipping a View with a shadow

[jsuarezruiz]

Description

Shadow not updated when Clipping a View with a shadow.

Example:

<Border 
  x:Name="BorderShadow"
  StrokeShape="RoundRectangle 24"
  Background="Red"
  WidthRequest="100" 
  Margin="12, 0">
  <Border.Shadow>
    <Shadow
      Brush="Black"
      Offset="12, 12"
      Radius="10"
      Opacity="1"/>
  </Border.Shadow>
</Border>

Tap a Button and Clip the View:

BorderShadow.Clip = new EllipseGeometry
{
	Center = new Point(50, 50),
	RadiusX = 25,
	RadiusY = 25
};

Steps to Reproduce

Can reproduce with the ShadowFeaturePage from the TestCases.HostApp sample.

Link to public reproduction project repository

No response

Version with bug

9.0.40 SR4

Is this a regression from previous behavior?

Not sure, did not test other versions

Last version that worked well

Unknown/Other

Affected platforms

Windows

Affected platform versions

No response

Did you find any workaround?

No response

Relevant log output

[similar-issues-ai]

We've found some similar issues:

• Changing view size/layout/position does not update the shadow #24476 , similarity score: 83%

If any of the above are duplicates, please consider closing this issue out and adding additional context in the original issue.

Note: You can give me feedback by 👍 or 👎 this comment.

[Axemasta]

@jsuarezruiz definitely a regression, I'm using Clip with a shadow to project a shadow upwards only to recreate a design like this

Using a clip on SizeChange stopped the shadow from going into the safe area, which on iphones looks really wierd

private void OnSizeChanged(object? sender, EventArgs e)
{
	// Shadows are applied uni-directionally so we need to apply a clip to contrain the shadow
	// to display above the bottom view only, otherwise the shadow below the view will display
	// within the safe area which looks terrible!
	var clipRect = new Rect(0, -50, Width, Height + 50);

	Clip = new RectangleGeometry(clipRect);
}

Since the move to .NET 9 I've noticed the clip is over running, applying any clip makes no difference

Looks like theres a PR thats fixed this which is wonderful news!

[sheiksyedm]

The fix has been merged into the main branch via PR #28560. Therefore, this issue can now be closed.