Tracker: WebGPU

[ibgreen]

deck.gl v10

(TBD, see luma.gl for WIP)

deck.gl 9.4

Last verified against master: 2026-07-27, after the PathLayer, SolidPolygonLayer, and HeatmapLayer ports landed.

Status: ✅ merged/working · 🟡 ready for review · 🟠 draft or partial · 🔴 CI needs attention · ⬜ focused verification/port still needed. Open-PR CI statuses were verified against GitHub on 2026-07-27.

Layer implementation and review queue

Layer / layer family	Status	PR	Comments / next action
TextLayer / GeoJsonLayer text points	🟡 Review	#10473	CI green. Glyph rendering; TextBackgroundLayer, collision filtering, and clipping remain separate follow-ups.
ScenegraphLayer	🟡 Review	#10477	CI green. glTF/PBR and WebGPU instance picking; stacked on #10476, whose CI is also green. Merge the flight-data/example fix first.
TripsLayer	🔴 Fix CI	#10484	CI failed on two unrelated TerrainEffect timeouts. TripsLayer regression coverage passes; rerun or investigate the shared terrain tests before merging. The example retains polygon ground/buildings and covers naturally closed paths and explicit loops.
SimpleMeshLayer	🟡 Review	#10485	CI green. Restores the original polygon background. Shadow effects remain a separate WebGPU follow-up.
GridLayer	🟠 Draft	#10482	CI green; still draft. CPU aggregation fallback plus the merged GridCellLayer renderer; finish review and mark ready.
ArcLayer / ContourLayer website device tabs	🟡 Review	#10494	CI green. Enables complete polygon-backed demos and adds real-WebGPU Arc, Contour, and Hexagon regression coverage.
ArcLayer, IconLayer, LineLayer, PointCloudLayer, ScatterplotLayer, ColumnLayer, GridCellLayer	✅ Merged	#10466	Shared simple-layer WGSL ports and premultiplied-alpha blending.
GreatCircleLayer	✅ Inherits merged port	#10466	Deprecated thin subclass of ArcLayer; no independent shader port is needed. Verify the greatCircle: true example/test path if adding dedicated coverage.
PathLayer / GeoJsonLayer line strings	✅ Merged	#10113	Supports path-based composite layers and the Trips port.
SolidPolygonLayer / PolygonLayer / GeoJsonLayer polygons	✅ Merged	#10142	Polygon dependencies are available on master; do not remove background, building, county, or contour polygon sublayers from new ports.
BitmapLayer	🟠 Base port merged	#10470	Basic bitmap rendering is in tree; document and test any remaining texture/API edge cases separately.
Image TileLayer / WMSLayer	✅ Base rendering path	#10470	Image/WMS rendering is built on BitmapLayer; preserve the existing complete examples and validate image-loading edge cases separately.
HexagonLayer	✅ Merged	#10471	CPU aggregation fallback is in tree. #10494 corrects the stale support table and adds WebGPU regression coverage.
ScreenGridLayer	✅ Merged	#10472	CPU aggregation fallback. Native WebGPU aggregation is still a separate feature.
HeatmapLayer	✅ Merged	#10483	Focused WebGPU heatmap port is now on master.
ContourLayer	✅ Rendering works; example PR open	#10494	Existing CPU aggregation plus landed PathLayer isolines and SolidPolygonLayer isobands already render on WebGPU; merge the example, documentation, and regression coverage.
S2Layer / QuadkeyLayer / GeohashLayer	🟡 Review	#10495	Review fixes pushed; CI running. Normalizes loaders.gl CSV tables and reactively reapplies legend filtering to loaded rows. Six real-WebGPU cases cover flat stroked and extruded wireframe cells; preserves all five Global Grid systems, device tabs, the globe overlay, and existing WebGL behavior.
A5Layer	🟡 Review	#10497	CI green. Verifies bigint and hexadecimal identifiers, flat outlines, and extruded pentagon tops, sides, and wireframes on WebGPU.
H3ClusterLayer / H3HexagonLayer	🟡 Review	#10496	CI green. Verifies H3 cluster polygons, high-precision polygon hexagons, and low-precision instanced ColumnLayer hexagons.
MVTLayer	⬜ Verify / write focused PR	—	Reuse landed TileLayer, GeoJsonLayer, path, and polygon support; verify binary attributes, tile loading, and custom sublayers.
TerrainLayer / Tile3DLayer	⬜ Write focused PR(s)	—	Verify against the SimpleMeshLayer and ScenegraphLayer ports once #10485 and #10477 land.
CARTO tile and label layers	⬜ Verify / write focused PR(s)	—	ClusterTileLayer, H3TileLayer, HeatmapTileLayer, PointLabelLayer, QuadbinTileLayer, RasterTileLayer, and VectorTileLayer; verify each against its now-landed polygon, bitmap, heatmap, text, and tile dependencies.

Cross-cutting work

• 🟡 #10493: enable WebGPU render tests; approved.
• 🟡 #10478: upgrade to luma.gl 9.4.0-alpha.1; approved.
• ✅ #10151: explicit WebGPU attribute buffer groups.
• ✅ #10479: remove unnecessary backend-specific shader checks.
• ✅ #10467 and #10480: persisted device selection and shared example-device plumbing.
• Native WebGPU aggregation; current supported aggregation layers may intentionally use CPU fallback.
• Finish WebGPU picking, hover, and click integration.
• Shadows, text backgrounds, collision filtering, clipping, shader injections, and other WebGL-only effects/extensions.
• 64-bit emulation with 32-bit source data; convert inputs to 64-bit where needed.
• Remove remaining WebGL-specific calls, particularly setGLDeviceParameters().
• Avoid unsupported unorm8x1 and unorm8x3 attribute formats.
• Fix React map/base-map overlay integration and remaining premultiplied-alpha issues.
• Address shader-module/project feedback in #9509.
• Investigate and remove the workaround from #9527.

Superseded work

• #10450: closed; useful only as a reference when extracting focused layer ports.
• #9723: closed and superseded by the merged SolidPolygonLayer port #10142.

deck.gl 9.3

• Picking: Add async picking APIs to picking manager @ibgreen feat(core): Add async DeckPicker methods #9732
• WebGPU examples must provide pickable: true otherwise instanceColors are not supplied which will invalidate the pipeline execution

deck.gl 9.2

WEBSITE - Make a few layers run under WebGPU

• WEBSITE: Add a device switcher to deck.gl website - @Kaapp
• WEBSITE: Add PointcloudLayer WebGPU Tab- @Kaapp
• WEBSITE: Add ScatterplotLayer WebGPU Tab - @ibgreen
• WEBSITE: Add LineLayer WebGPU Tab? - @Kaapp
• Move deck layers to premultiplied alpha to enable map overlays @Kaapp
• Fix buffer generation for constant attributes under WebGPU @Kaapp
• Replace Textures in deck with AsyncTexture @felixpalmer

deck.gl 9.1: Make a few layers run under WebGPU already in 9.1.x

• Publish unblocking fixes Use devicePixelRatio for rendering #1 in luma.gl 9.1 (v9.1.4) @ibgreen
• Publish more unblocking fixes in luma.gl 9.1 (TBD) @ibgreen
• Port deck.gl project shader modules to WGSL @ibgreen
• Temporarily fork examples/website/scatterplot to test/apps/webgpu-scatterplot and port shaders to WGSL @ibgreen
• Temporarily fork examples/website/line to test/apps/webgpu-line and port shaders to WGSL @ibgreen
• Update AttributeManager to generate buffers for constant values under WebGPU fix(chore): Disable constant attributes under WebGPU #9506
• Handle or provide clear errors when unused uniforms in a shader are trimmed resulting in too many uniforms supplied to shader - See feat: Use explicit pipeline layouts from shaderLayout luma.gl#2355
• Handle when vertex attribute binding order results in an error regarding incorrect buffer sizes. - See fix: Ensure VertexBufferLayout matches parsed WGSL shader @location layout luma.gl#2363 & fix: Vertex buffer locations set in the same order as pipeline, derived from shader source luma.gl#2364
• Replace all calls to readPixelsWebGL()
• Remove all calls to Model.updateModuleSettings() @felixpalmer

[ibgreen-openai]

WebGPU layer-port PR status after rebasing onto latest master (#10466 landed buffer groups + blending fixes):

Layer / feature	PR	Comments
Follow-on WebGPU layer stack: BitmapLayer, PathLayer, SolidPolygonLayer/GeoJsonLayer, TextLayer, HexagonLayer, ContourLayer, ScreenGridLayer, ScenegraphLayer, TileLayer/WMSLayer; extension no-op behavior; website device toggles	#10450	Main consolidated follow-up. Rebasing kept the landed ArcLayer/ColumnLayer implementations from #10466, so it inherits the reviewed blending behavior instead of duplicating those ports.
SolidPolygonLayer / GeoJsonLayer polygons	#10142	Focused SolidPolygon port, rebased onto #10466 and trimmed to the current buffer-group implementation. Supersedes the older #9723 draft.
PathLayer	#10113	Focused PathLayer port, rebased onto #10466. Also represented in the consolidated #10450 stack.
ScenegraphLayer	#10112	Focused ScenegraphLayer port, rebased onto #10466. Also represented in the consolidated #10450 stack.

Recently resolved/superseded:

• #10466 landed the simple layer ports, buffer-group support, and shared blending improvements.
• #10122 (ColumnLayer) is now closed because its rebased branch became empty after feat(layers): add simple WebGPU layer ports #10466 landed.
• #9723 was closed as superseded by feat(layers) Port SolidPolygonLayer to WebGPU #10142.