This repo reproduces a bug in WinUI 3 Preview 2 where Win2D blur brush around window border has a gradient masked effect. To prove uwp doesn't have this bug a uwp project with the exact same code is also included.
Folder structure:
BlurBrushTestUwp: This is the control project: UWP doesn't have this bug.BlurBrushTestWinUI3Preview2Uwp: This is the WinUI 3 Preview 2 project which can reproduce the bug.
Note: The bug appears in WinUI regardless of effect border mode/sprite visual border mode. In UWP, the blur works fine regardless of either mode as well.
Steps to reproduce
- Build the project in
BlurBrushTestWinUI3Preview2Uwp. - Observe blur around the window border has a gradient masked effect.
Expected Result
WinUI blur brush is the same as UWP blur brush.
Actual Result
WinUI blur brush has a weird masked gradient effect around window border.
Version Windows 10 2004
Screenshots
UWP:
WinUI 3 Preview 2
