feat: add WGSL linear_indexing and CAPS_STORAGE_TEXTURE_READ#8648
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Detect linear_indexing via wgslLanguageFeatures, expose supportsLinearIndexing, inject requires linear_indexing for compute only, and add CAPS defines for linear indexing and storage-texture read. JSDoc updated for storage texture read.
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Adds support for the WGSL
linear_indexinglanguage extension (Chrome 147+):global_invocation_indexandworkgroup_indexin compute shaders. Also setsCAPS_STORAGE_TEXTURE_READwhen storage-texture reads are supported, and clarifies JSDoc forsupportsStorageTextureRead.Changes:
WebgpuGraphicsDevice: setsupportsLinearIndexingfromwgslLanguageFeatures.has("linear_indexing").GraphicsDevice: newsupportsLinearIndexingproperty;initCapsDefinessetsCAPS_LINEAR_INDEXINGandCAPS_STORAGE_TEXTURE_READwhen applicable.ShaderDefinitionUtils.getWGSLEnables: injectrequires linear_indexing;for compute shader modules only when supported.supportsStorageTextureReadnow notesCAPS_STORAGE_TEXTURE_READand uses a WGSL code fence for therequiresexample.API (public):
GraphicsDevice#supportsLinearIndexing—boolean, defaultfalse(WebGL and unsupported browsers).CAPS_LINEAR_INDEXING,CAPS_STORAGE_TEXTURE_READ(when the device reports the matching capability).https://developer.chrome.com/blog/new-in-webgpu-147-148#wgsl_linear_indexing_extension