OpenGL compatibility

[msiglreith]

OpenGL supports binary SPIR-V shaders as source since 4.6, mostly feature compatible with Vulkan shader requirements.
Right now rust-gpu requires the Vulkan memory model which is not support. OpenGL only supports the GLSL450 model.
Would be interesting how deep the implementation relays on it. Quickly tweaking the capabilities and extensions towards GLSL results in a binary which can be passed to OpenGL.

(rather a feature request than a bug)

[repi]

Interesting, thanks for filing!

Do you have any specific use case of OpenGL with SPIRV where Vulkan is not available / appropriate?

[msiglreith]

Do you have any specific use case of OpenGL with SPIRV where Vulkan is not available / appropriate?

No, I mainly use OpenGL for trying out stuff, as it's easier to setup and iterate for me compared to Vulkan. Combining it with rust-gpu sounds appealing to me as it might make is even more pleasant in the future!

[Jasper-Bekkers]

Keep in mind that in the future some of the features might require the Vulkan Memory Model.

[khyperia]

and further context, those features will be disabled on non-Vulkan, the same way kernel-mode ops are disabled on shader-mode today.

[msiglreith]

Thanks, works perfectly! 🎉
Ported a small shader I saw on shadertoy: