Win2D with Xaml Islands Problem

[rmarinho]

When I try a real world app (legacy wpf app ported to net8.0-windows) it works fine with WinUI and Xaml Islands but as soon as I try to use a Win2D like create CanvasControl (this is via .NET MAUI) it fails with following error.

System.Runtime.InteropServices.COMException (0x80040154): The data area passed to a system call is too small.

   at System.Runtime.InteropServices.Marshal.ThrowExceptionForHR(Int32 errorCode)
   at WinRT.ActivationFactory.Get(String typeName, Guid iid)
   at Microsoft.Graphics.Canvas.Text.CanvasFontSet.get__objRef_global__Microsoft_Graphics_Canvas_Text_ICanvasFontSetFactory()
   at Microsoft.Graphics.Canvas.Text.CanvasFontSet..ctor(Uri uri)

hard for me to share a repo as in my sample works fine.

One of the differences is on real world app uses a plugin model where we don t add reference to a Lib project like in the sample app, it loads the assembly and creates the control. But like I said above works fine with Xaml Islands, so the init of the WindowsAppSdk seems to be working fine

Example of the csproj

<Project Sdk="Microsoft.NET.Sdk">
	<PropertyGroup>
		<OutputType>WinExe</OutputType>
   		<TargetFramework>net8.0-windows10.0.26100.0</TargetFramework>
    		<TargetName>Studio</TargetName>
		<StartupObject>iStudio.Program</StartupObject>
		<NeutralLanguage>en</NeutralLanguage>
		<UseWindowsForms>true</UseWindowsForms>
    		<UseWpf>true</UseWpf>
    		<UseWinUI>true</UseWinUI>
    		<LangVersion>default</LangVersion>
		<UseApplicationTrust>false</UseApplicationTrust>
		<Nullable>enable</Nullable>
		<ImplicitUsings>disable</ImplicitUsings>
		<GenerateAssemblyInfo>false</GenerateAssemblyInfo>
		<GenerateTargetFrameworkAttribute>false</GenerateTargetFrameworkAttribute>
		<TreatWarningsAsErrors>true</TreatWarningsAsErrors>
		<SignAssembly>True</SignAssembly>
		<AppendTargetFrameworkToOutputPath>false</AppendTargetFrameworkToOutputPath>
		<EmbeddedResourceUseDependentUponConvention>true</EmbeddedResourceUseDependentUponConvention>
		<GenerateDependencyFile>false</GenerateDependencyFile>
		<RollForward>LatestMinor</RollForward>
    		<WindowsAppSdkBootstrapInitialize>true</WindowsAppSdkBootstrapInitialize>
   		<WindowsPackageType>None</WindowsPackageType>
    		<EnableUnsafeBinaryFormatterSerialization>true</EnableUnsafeBinaryFormatterSerialization>
  	</PropertyGroup>

  	<ItemGroup>
    		<PackageReference Include="Microsoft.WindowsAppSDK" Version="1.7.250606001" />
    		<PackageReference Include="Microsoft.Windows.SDK.BuildTools" Version="10.0.26100.4188" />
  	</ItemGroup>

  <ItemGroup Condition="$(TargetFramework.Contains('-windows'))">
    <PackageReference Include="Microsoft.Graphics.Win2D" Version="1.3.2" />
    <PackageReference Include="Microsoft.IO.RecyclableMemoryStream" Version="3.0.1" />
  </ItemGroup>
  
  <PropertyGroup Condition="$([MSBuild]::IsTargetFrameworkCompatible($(TargetFramework), 'net8.0'))">
    <RuntimeIdentifiers>win10-x86;win10-x64;win10-arm64</RuntimeIdentifiers>
    <UseRidGraph>true</UseRidGraph>
  </PropertyGroup>