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SDL3 GPU WebGPU Backend#12046

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Commits on Jan 21, 2025

• Nuked my repo due to it being 600 commits ahead of upstream even though all of the commits were the one I just rebased... Fixed everything back up.

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• Got Point, Linear, and Aniso samplers working with Clamp and Repeat

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• Began work on PushVertexUniformData. Investigated bug where certain GPU objects aren't being released via the bindings. Might be an actual bug with Emscripten's bindings specifically, need more info.

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• Cleaned up logging in preparation for managing Uniform Buffers.

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• Refactored buffer and texture data structures to be more simple as there is no reason for them to mimic the Vulkan implementation. Added GPU API checklist. Next will be vertex and fragment uniform …

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• PushVertexUniformData() and PushFragmentUniformData() no longer cause crashes, but nothing renders properly. Need to investigate further.

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• Fixed SDLToWGPUTextureUsageFlags() to properly handle bit flags instead of individual enums.

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• Working on getting WebGPU_Blit() ready for implementation by solving a bunch of existing bugs with the backend. Still encountering a layerCount issue that I cannot verify. My debugger says the text…

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• Implemented simple miscellaneous functions to knock them off of the checklist.

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• Trying to get array layers working for 3D textures since WebGPU only allows views of 1 layer for color attachments...

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• Implemented a blitting pipeline for WebGPU since there is no blit functionality offered in WebGPU.

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• Refactored to use SDL_GPU_BlitCommon instead of writing my own WebGPU pipelines. Now we create internal SDL pipelines and everything is handled nicely. 3D texture example still works.

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• Made more progess on 2D texture array blitting. Now I need to investigate why the sampler isn't working in the Blit2DArray example.

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• Refactored several calls to SDL_malloc to SDL_stack_alloc if data is no longer needed outside of the frame. Minimizes heap resizing

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• Feat: Added stencil reference adjustment

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• Feat: Got BlitCube example working

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• Refactor: Eliminated many unnecessary dynamic memory allocations. Far more static allocations now. Static allocations only occur on named object creation, and when dealing with PipelineLayouts. Pla…

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• Removed print statements that angered different test pipelines.

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• Misc: Moved SDL3 WebGPU Checklist to src/gpu/webgpu/

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• Misc: Moved SDL3 WebGPU Checklist to src/gpu/webgpu/

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• Misc: Added SDL3 GPU ReadMe

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• Misc: Added SDL3 GPU ReadMe

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• Misc: Updated emscripten's version for the test pipeline.

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• Misc: Updated emscripten's version for the test pipeline.

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• Misc: trying to get Emscripten test pipeline working.

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• Fix: Rebased with upstream and solved a recently implemented bug with the emscripten keyboard event handlers when no hint was set.

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• Feat: Made swapchain a static allocation.

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• Refactor: Removed Emscripten specific Swapchain logic. Now I manually configure the surface. Elie Michel's surface configuration logic was added but the macros don't seem to want to work for me. I'…

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• Feat: Implemented indirect drawing support for WebGPU.

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Commits on Jan 22, 2025

• Refactor: Added explicit loop termination while waiting for the device callback.

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• Refactor: Setting of viewport and scissor is done in WebGPU_BeginRenderPass

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• Misc: Added standard text to top of file.

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• Misc: Changed some imports.

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• Misc: Changed some more imports.

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• Refactor: Changed default renderpass state initialization to better match Vulkan implementation.

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• Refactor: Removed ~0u conversion as I had forgotten that I had resolved this problem already.

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• Refactor: Moved SDL_internal.h to the very top

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Commits on Jan 23, 2025

• Refactor: Started implementing fencing properly.

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• Refactor: Added fence pool and associated internal functions.

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• Refactor: Added uniform buffer pool.

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• Refactor: Implemented placeholder fencing logic. Has not actually been tested but it compiles.

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