Update sample to be able use NativeAOT

[kant2002]

rd.xml file is workaround to SharpDx limitations.

[mellinoe]

Hey @kant2002, thanks for the submission here. In newer versions of Veldrid (of which there are only beta releases...), SharpDX has actually been replaced by Vortice. I think a better approach here would be to update the sample projects to reference Veldrid 4.9.0-beta2 and see if NativeAOT works out of the box. If it doesn't, we will probably need a slightly different rd.xml file, but chances are much higher that it will work.

[kant2002]

I did update to beta, and problem just move to Vortice. Actual root cause is missing trimming annotations for SharpGen.Runtime, so I will try to fix issue there.

[kant2002]

sigh, https://github.com/SharpGenTools/SharpGenTools/blob/7917a51b8203bcdd3e3fc0750b7f93f1888838ea/SharpGen.Runtime/MarshallingHelpers.cs#L18-L20 we already have annotations, but they are not part of latest release and Jeremy is overworked. Probably have to live with this for now.

[kant2002]

Let's see how it goes with SharpGenTools/SharpGenTools#229

[zaafar]

good news: amerkoleci/Vortice.Windows#379 (comment)

[kant2002]

I think Veldrid should be recompiled, since If I manually bump version by adding <PackageReference Include="Vortice.Direct3D11" Version="2.3.0" /> then app brokes in NativeAOT and in runtime.

Unhandled Exception: System.MissingMethodException: Method not found: 'Vortice.Direct3D11.Texture2DDescription.CpuAccessFlags'.
   at Internal.Runtime.TypeLoaderExceptionHelper.CreateMissingMethodException(ExceptionStringID, String) + 0x40
   at Internal.Runtime.CompilerHelpers.ThrowHelpers.ThrowMissingMethodException(ExceptionStringID, String) + 0x9
   at Veldrid.D3D11.D3D11Texture..ctor(ID3D11Texture2D, TextureType, PixelFormat) + 0x15
   at Veldrid.D3D11.D3D11Swapchain.Resize(UInt32, UInt32) + 0x22b
   at Veldrid.D3D11.D3D11Swapchain..ctor(D3D11GraphicsDevice, SwapchainDescription&) + 0x511
   at Veldrid.D3D11.D3D11GraphicsDevice..ctor(D3D11DeviceOptions, Nullable`1) + 0x445
   at Veldrid.GraphicsDevice.CreateD3D11(GraphicsDeviceOptions, SwapchainDescription) + 0xf8
   at Veldrid.StartupUtilities.VeldridStartup.CreateDefaultD3D11GraphicsDevice(GraphicsDeviceOptions, Sdl2Window) + 0xa6
   at Veldrid.StartupUtilities.VeldridStartup.CreateGraphicsDevice(Sdl2Window, GraphicsDeviceOptions, GraphicsBackend) + 0x4a
   at Veldrid.StartupUtilities.VeldridStartup.CreateWindowAndGraphicsDevice(WindowCreateInfo, GraphicsDeviceOptions, GraphicsBackend, Sdl2Window&, GraphicsDevice&) + 0x79
   at ImGuiNET.Program.Main(String[]) + 0x152
   at ImGui.NET.SampleProgram!<BaseAddress>+0x2ef85b

[amerkoleci]

I would suggest to update vortice to latest 2.3.0 in veldrid and then use that veldrid build for imgui.

I'll try to keep method names backward compatible in future.

[kant2002]

that's what I plan to do. Thankfully in my case Veldrid and ImGui.Net have same maintainer, so things would be easiers to handle. I just let you know that renamig in minor version cause problems. I understand that if you are alone, it's hard to keep track of everything.

[amerkoleci]

that's what I plan to do. Thankfully in my case Veldrid and ImGui.Net have same maintainer, so things would be easiers to handle. I just let you know that renamig in minor version cause problems. I understand that if you are alone, it's hard to keep track of everything.

PR ready: veldrid/veldrid#478

[kant2002]

After updating to latest Veldrid ImgUI.Net works with NativeAOT out of the box! Thank you guys!