Texture Builtins Issues

Texture Builtins Issues

Various GPUs and drivers have issues (bugs) related sampling textures. Below is a list of known issues. If you'd like to check your own GPU you can run all of the WGSL builtin function tests or you can run the individual texture builtin function tests

• textureLoad
• textureGather
• textureGatherCompare
• textureSample
• textureSampleBaseClampToEdge
• textureSampleBias
• textureSampleCompare
• textureSampleCompareLevel
• textureSampleGrad
• textureSampleLevel
• textureStore

Note: A failure does not guarantee a bug in the GPU. Rather, the results need to be inspected. Some results indicate a bug. Others indicate the test itself might be too sensitive.

Known Issues

The known issues are listed in the file below.

You may find the raw version more readable as the comparisons between the software sampler and the GPU sampler can be fairly wide

• file: https://github.com/gpuweb/cts/blob/main/src/webgpu/shader/execution/expression/call/builtin/texture_builtin_notes.md
• raw: https://raw.githubusercontent.com/gpuweb/cts/refs/heads/main/src/webgpu/shader/execution/expression/call/builtin/texture_builtin_notes.md