Add WebGPU subgroup operations support#8528
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mvaligursky merged 1 commit intomainfrom Mar 13, 2026
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Request the `subgroups` device feature, add `supportsSubgroups` property, auto-inject `enable subgroups;` and `requires subgroup_id;` into WGSL shaders, and expose `CAPS_SUBGROUPS` / `CAPS_SUBGROUP_ID` shader defines. Made-with: Cursor
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Adds support for WebGPU subgroup operations as an optional device capability.
Changes:
subgroupsdevice feature when the adapter supports itsupportsSubgroupsproperty toGraphicsDevicefor runtime capability checkingCAPS_SUBGROUPSandCAPS_SUBGROUP_IDshader defines for conditional compilationenable subgroups;andrequires subgroup_id;directives into WGSL shaders when availablesupportsSubgroupUniformityandsupportsSubgroupIdpropertiesAPI Changes:
GraphicsDevice.supportsSubgroups(boolean, readonly) — true when the device supports subgroup builtins (subgroupBroadcast,subgroupAll,subgroupAny,subgroupAdd,subgroupShuffle, etc.)CAPS_SUBGROUPSshader define — available via#ifdef CAPS_SUBGROUPSCAPS_SUBGROUP_IDshader define — available via#ifdef CAPS_SUBGROUP_ID