Rectangle draws too big shape (in C# markup)

[kucint]

Current behavior

Following code should draw a rectangle of size 10x6

new Rectangle()
    .Width(10)
    .Height(6)
    .StrokeThickness(1)
    .Stroke(Colors.Black)

but it draws a rectangle of size 13x8 (anti-aliased inner rectangle has size 11x6)

This is original screenshot:

This is the same screenshot zoomed in Paint:

Expected behavior

The code should draw a rectangle of size 10x6

How to reproduce it (as minimally and precisely as possible)

STEPS TO REPRODUCE

• create a new Uno project, select:
  • windows only
  • C# markup
  • MVUX
  • replace default MainPage content with provided snippet

MINIMAL REPRO PROJECT

Environment

{
  "msbuild-sdks": {
    "Uno.Sdk": "5.1.104",
    "Microsoft.Build.NoTargets": "3.7.56"
  }
}

Nuget Package (s):

<Project ToolsVersion="15.0">
  <ItemGroup>
    <PackageVersion Include="Microsoft.Extensions.Logging.Console" Version="8.0.0" />
    <PackageVersion Include="Microsoft.Windows.SDK.BuildTools" Version="10.0.22621.2428" />
    <PackageVersion Include="Microsoft.WindowsAppSDK" Version="1.4.231219000" />
    <PackageVersion Include="Uno.Core.Extensions.Logging.Singleton" Version="4.0.1" />
    <PackageVersion Include="Uno.Extensions.Core.WinUI" Version="4.0.0" />
    <PackageVersion Include="Uno.Extensions.Hosting" Version="4.0.0" />
    <PackageVersion Include="Uno.Extensions.Hosting.WinUI" Version="4.0.0" />
    <PackageVersion Include="Uno.Extensions.Logging.WinUI" Version="4.0.0" />
    <PackageVersion Include="Uno.Extensions.Reactive" Version="4.0.0" />
    <PackageVersion Include="Uno.Extensions.Reactive.WinUI" Version="4.0.0" />
    <PackageVersion Include="Uno.Toolkit.WinUI" Version="5.1.7" />
    <PackageVersion Include="Uno.Resizetizer" Version="1.4.0" />
    <PackageVersion Include="Uno.UI.Adapter.Microsoft.Extensions.Logging" Version="$(UnoVersion)" />
    <PackageVersion Include="Uno.UniversalImageLoader" Version="1.9.36" />
    <PackageVersion Include="Uno.WinUI" Version="$(UnoVersion)" />
    <PackageVersion Include="Uno.WinUI.Lottie" Version="$(UnoVersion)" />
    <PackageVersion Include="Uno.WinUI.Markup" Version="5.1.5" />
    <PackageVersion Include="Uno.Extensions.Markup.Generators" Version="5.1.5" />
    <PackageVersion Include="Uno.Toolkit.WinUI.Markup" Version="5.1.3" />
    <PackageVersion Include="Uno.Extensions.Reactive.WinUI.Markup" Version="4.0.0" />
    <PackageVersion Include="Uno.Themes.WinUI.Markup" Version="4.1.1" />
    <PackageVersion Include="Uno.WinUI.DevServer" Version="$(UnoVersion)" />
  </ItemGroup>
</Project>

Affected platform(s):

• [ ] iOS
• [ ] macOS (AppKit)
• [ ] Mac Catalyst
• [ ] Android
• [ ] WebAssembly
• [x] Windows
• [ ] Skia (WPF)
• [ ] Skia (GTK on Linux/macOS/Windows)
• [ ] Skia (Linux Framebuffer)
• [ ] Build tasks

Visual Studio:

• [ ] 2019 (version: )
• [x] 2022 (version: 17.9.5)
• [ ] Visual Studio Code (version: )
• [ ] Rider Windows (version: )
• [ ] Rider macOS (version: )

Relevant plugins:

• [ ] Resharper (version: )

Anything else we need to know?

checked only on windows. Other platforms - behavior unknown.

[Youssef1313]

Maybe there is DPI scaling?

[kucint]

oh gosh! you are perfectly right! this is due to dpi scaling... Thanks for the hint!