This is a Dockerfile and a Justfile script to build a Docker image for the recompiling graphics shaders. My primary focus is supporting recompiling GLSL shaders into Metal Shading Language. But there are enough tools here to convert many other shader formats.
It currently includes shaderc and SPIRV-Cross.
Shaderc itself includes a bunch of dependencies, including glslc (and glslang), which will allow you to convert GLSL (among other formats) shaders to SPIR-V.
SPIRV-Cross can convert SPIR-V to Metal Shading Language (and other formats).
SPIR-V is used as an intermediate format for conversion.
You'll require docker, but on macOS, I highly recommend OrbStack instead. You'll also need Just to run the tasks within the provided Justfile directly. But if you don't want to use Just, you can just copy and paste the shell script commands contained within the Justfile itself.
If you're using this project to set up your own Dockerfile be aware that this needs a "linux/amd64" docker container. See the 'build' rule of the Justfile for more information.
If you have Just installed you can build everything with just build. On my M1 16"-MBP this takes approximately 5 minutes. Then take a look at the example rule in the Justfile for examples showing how to convert GLSL shaders to Metal Shading Language (and change the entry point name).
There's also help for both glslc and SPIRV-Cross within the artifacts directory to help you get started.
$ just sh
$ ls /usr/local/bin
glslang glslc spirv-cfg spirv-dis spirv-link spirv-objdump spirv-reduce spirv-val
glslangValidator spirv-as spirv-cross spirv-lesspipe.sh spirv-lint spirv-opt spirv-remapI don't think so. Apple's tool converts from shaders in LLVM/IR format to MSL. Currently, only (Windows) DirectX DXIL format shaders seem supported.
You may need to convert your WebGL shaders to GLSL-Es "style" first. Add #version 310 es to the front of your shader files and then fix the errors glslc gives you. See Examples for more help.
Because I haven't found a better way than writing my own Dockerfile. None of these tools are available in any of the standard package managers (brew, etc). Installing them on arm64 macOS requires a ton of dependencies and troubleshooting architecture issues. I also haven't found (but to be honest didn't spend a lot of time looking) a pre-built docker image that includes all of these tools either.
I haven't found any of this stuff to be simple. But if there's a better solution let me know.