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feat(extensions): port Fp64Extension to WebGPU - #11033
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 [Medium impact] The PR appears safe to merge, with the previous documentation finding fixed and no new findings. SummaryAdds WebGPU support to
No new issues were found in the changes since the previous review. Reviews (2) · Last reviewed commit: "docs: consolidate fp64 extension limitat..." · Reviewed by Greptile |
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coverage: 84.815%. remained the same — codex/webgpu-fp64-extension into master |
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coverage: 84.815%. remained the same — codex/webgpu-fp64-extension into master |
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| # Fp64Extension | ||
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| The `Fp64Extension` adds 64-bit precision to geospatial layers. | ||
| The `Fp64Extension` adds extended-precision Mercator projection to geospatial layers on WebGL and WebGPU. It represents coordinates as high and low `f32` terms using luma.gl's `fp64` shader module; this is emulated double-single arithmetic, not native IEEE 754 binary64. |
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| The `Fp64Extension` adds extended-precision Mercator projection to geospatial layers on WebGL and WebGPU. It represents coordinates as high and low `f32` terms using luma.gl's `fp64` shader module; this is emulated double-single arithmetic, not native IEEE 754 binary64. | |
| The `Fp64Extension` adds extended-precision Mercator projection to geospatial layers. It represents coordinates as high and low `f32` terms using luma.gl's `fp64` shader module; this is emulated double-single arithmetic, not native IEEE 754 binary64. |
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Background
Fp64Extensionlacks WGSL projection despite luma.gl providing the required fp64 functions. Add WebGPU Mercator projection through the existing dual-languageproject64module.Change List
Verified build, lint, website, targeted headless/render tests, and Apple M2 WebGPU tests. Numerical tests require hardware; no dependency changes.
Note
Low Risk
Adds WGSL support to an opt-in layer extension without altering core projection pipelines or default WebGL behavior.
Overview
Adds WebGPU support to
Fp64Extensionby implementing a WGSL counterpart for theproject64shader module. The WGSL shader utilizes luma.gl'sfp64emulated arithmetic functions and adjusts clip-space depth calculations to match WebGPU's[0, w]range.Includes comprehensive WebGPU tests covering high-zoom rendering, object picking, boundary transformations, and enables WebGPU visual regression tests for
ScatterplotLayer. Documentation is also updated to reflect WebGPU compatibility, hardware precision requirements, and performance characteristics.Reviewed by Cursor Bugbot for commit b7bc168. Bugbot is set up for automated code reviews on this repo. Configure here.