CompileFromFile not working in WinUI app

[Gavin-Williams]

When calling Vortice.D3DCompiler.Compiler.CompileFromFile (the shader compiler) in a WinUI app, the call fails with a file path not found error.

Here's a minimal WinUI app that shows the behavior.

CompileShaderFromFile.zip

[Gavin-Williams]

I can at least attest that the file can be fetched with the following Windows.Storage techniques...

Use install directory to connect to file path
StorageFolder folderInstall = Package.Current.InstalledLocation; StorageFolder folderAssets = await folderInstall.GetFolderAsync("Assets"); StorageFile file = await folderAssets.GetFileAsync("Color_VS.hlsl");

Use app uri to connect to file path
StorageFile file = await StorageFile.GetFileFromApplicationUriAsync(new Uri("ms-appx:///Assets//Color_VS.hlsl"));

[amerkoleci]

Can't you just read the content and compile the string without calling CompileFromFilename?

[Gavin-Williams]

Yes I can, I'm also looking into the resource manager, see if it might be a good replacement for handling files the way I do. I guess I just like to know what's going on, it's usually my fault.

Could the function throw a NotImplementedException if that's the case? Or is the issue in DirectX?

[amerkoleci]

From msdn docs: https://learn.microsoft.com/en-us/windows/win32/api/d3dcompiler/nf-d3dcompiler-d3dcompilefromfile

You can use this API to develop your Windows Store apps, but you can't use it in apps that you submit to the Windows Store. Refer to the section, "Compiling shaders for UWP", in the remarks for D3DCompile2.