DirectX-Graphics-Samples VS DirectXShaderCompiler

I also looked at the Microsoft sample like this: https://github.com/microsoft/DirectX-Graphics-Samples

It looks like Microsoft has official DirectX samples available, including an SSAO demo if you want to take a look at that. It does seem very different compared to your approach though, so it may not be of any use to you.

In my post I was using the generate mipmaps example to illustrate what I'm saying. In order to generate mipmaps in realtime in OpenGL you would simply make a call to generatemipmaps() or whatever it is called. In Vulkan it is more challenging because you have to do explicit resource management, but it isn't that bad still. In D3D12 you have to write your own compute shader https://github.com/Microsoft/DirectX-Graphics-Samples/blob/master/MiniEngine/Core/Shaders/GenerateMipsCS.hlsli

I wrote a sample a few years ago which implements this technique.

I eventually moved on to the official DirectX 12 Graphic Samples, which had isolated examples that were easier to learn from incrementally. The “Hello World” sample is the best starting point to get the renderer setup with a triangle. This repo is a great reference when you need to verify process and structure (like the order of operation of APIs). Whenever I had a strange bug in my app, I’d go back to these examples to do a diff and see what I was missing.

You probably want to take a look at the officiel DirectX samples page: https://github.com/microsoft/DirectX-Graphics-Samples It’s got samples covering a single topic each, which make them easier to digest, but there’s also the MiniEngine which is a render engine.

MiniEngine game engine

Something about the Github sample did catch my eye:

Microsoft put out this: https://github.com/microsoft/DirectX-Graphics-Samples

There is also this thing, but I never figured out how to compile that.

> We may support DXBC generation in Clang in the future (we mentioned that in the original proposal to LLVM). That work is unlikely to begin for a few years as our focus will be on supporting DXIL and SPIR-V generation first.

I appreciate this quote[0] from the microsoft camp. Setting clear expectations that something will not be done is a nice bit of fresh air.

[0] https://github.com/microsoft/DirectXShaderCompiler/issues/57...

There's no need for transpilers these days, you can just compile HLSL to SPIR-V bytecode with dxc.

https://github.com/microsoft/DirectXShaderCompiler

Use DXC and only HLSL for your main shader editing.

You can see libdxilconv in there, DXIL is the DirectX Intermediate Representation, documented in the open source shader compiler from Microsoft.

BTW, this problem can be reproduced as described below: - clone https://github.com/SaschaWillems/Vulkan.git - build the project and run it with arguments : -v - s hlsl to enable the validation layer and to use hlsl code - run ComputeShader project. The following validation error "Type mismatch on descriptor slot ..." will be shown in the console. - to fix it, as suggested above, you can replace the 3rd line of emboss.comp, sharpen.comp, and edgedetect.comp from: Texture2D inputImage : register(t0); //Creates validation errors to RWTexture2D inputImage : register(u0); //no validation errors (you'll then need to recompile the shaders to spv with a proper hlsl compiler such as Microsoft dxc)

EDIT: There is also naga but it does not take HLSL as input: https://github.com/gfx-rs/naga but you can use DirectXShaderCompiler to compile to SpirV, then use naga to compile to Metal.

🤨 For a "refusal to acknowledge it", they do appear to have a rather sizeable document mapping between HLSL and SPIR-V? https://github.com/microsoft/DirectXShaderCompiler/blob/main/docs/SPIR-V.rst

I am starting work on a compute-driven rendering engine, and it seems that the best way to go around it will be to write code in HSSL, and then use DirectXShaderCompiler to generate SPIR-V, and SPIRV-Cross to then generate MSL. And while DXSC's repo has a page on incompatibilities, no such resource seems to exist for SPIRV-Cross targeting Metal.

DirectX Shader Compiler