[WinUI] Shadows shape is wrong when using clipped image

[emaf]

Description

When using shadows with a clipped image that has a specific shape (i.e., circular), the shape of the shadow is a square/rectangle.

This is an screenshot from the Maui.Controls.Sample app:

The control on the center is an image with an EllipseGeometry Clip.

Steps to Reproduce

1. Run the Maui.Controls.Sample app
2. Navigate to Core -> Shadows -> Shadows playground
3. Check the Clipped View sample

Expected: the shadow should have the same cicular shape as the Clipped View control.

Sample code:

maui/src/Controls/samples/Controls.Sample/Pages/Core/ShadowGalleries/ShadowPlaygroundPage.xaml

Lines 70 to 89 in 3f41775

	<Image
	x:Name="ClippedShadowView"
	Grid.Row="5"
	Aspect="AspectFill"
	Source="header_background.png"
	HeightRequest="100"
	WidthRequest="100">
	<Image.Clip>
	<EllipseGeometry
	Center="50, 50"
	RadiusX="50"
	RadiusY="50"/>
	</Image.Clip>
	<Image.Shadow>
	<Shadow
	Brush="{Binding Source={x:Reference ShadowColor}, Path=Text, Converter={StaticResource cnvStringToBrush} }"
	Radius="{Binding Source={x:Reference ShadowRadiusSlider}, Path=Value }"
	Opacity="{Binding Source={x:Reference ShadowOpacitySlider}, Path=Value }"/>
	</Image.Shadow>
	</Image>

Link to public reproduction project repository

No response

Version with bug

7.0.92

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

No response

[rachelkang]

@emaf did you fix this through the PR linked above? Can we close this now?

[ghost]

We've added this issue to our backlog, and we will work to address it as time and resources allow. If you have any additional information or questions about this issue, please leave a comment. For additional info about issue management, please read our Triage Process.

[emaf]

@rachelkang No, we found this one while testing #16895. This was not introduced by those changes, but we couldn't fix this problem as part of those either, so I just filed a bug to track this problem.

[XamlTest]

Verified on VS 17.10.0 Preview 4.0(8.0.20). Repro on Windows 11, not repro on Android 14.0-API34
with below Project:
16922.zip
Windows: