web: the page's device keeps WebGPU's default texture and compute limits for now

e204fa1b asked for GL 4.1's and 4.3's limits, and the page context became
GL 4.6 -- and Unity's 4.x shader variants then drew Muck's 3D scene as
black silhouettes (U, mp26 on edger; sky, clouds and UI right). Back to
the defaults (GL 4.0, with 707e84b8's version fit for 4.1-4.6 sources)
until the 4.x path is fixed. The decoder's full 4.1-4.6 requirement report
stays.

Co-Authored-By: Claude Opus 5.5 (1M context) <[email protected]>
Claude-Session: https://claude.ai/code/session_d2453757b8a84fdbb4ee7c9e093141df

web/public/mesa-wgpu-replay.html

@@ -98,21 +98,10 @@
       // sample, so any wider attachment set fails on it -- GL 3.2 wants
       // eight draw buffers of whatever format the application chose.
       maxColorAttachmentBytesPerSample: 64,
-      // GL 4.1 wants 16384 texels a side and 2048 array layers
-      // (compute_version), and WebGPU's defaults are 8192 and 256: without
-      // asking, every context settled at 4.0 and GLSL 4.00, and Unity's
-      // #version 410 geometry stages (Muck's grass) failed to compile. GL
-      // 4.3's compute shaders want 1024 invocations a workgroup and 32 KiB
-      // of shared memory (WebGPU: 256 and 16 KiB). All clamped to the adapter.
-      maxTextureDimension1D: 16384,
-      maxTextureDimension2D: 16384,
-      maxTextureDimension3D: 2048,
-      maxTextureArrayLayers: 2048,
-      maxComputeInvocationsPerWorkgroup: 1024,
-      maxComputeWorkgroupSizeX: 1024,
-      maxComputeWorkgroupSizeY: 1024,
-      maxComputeWorkgroupSizeZ: 64,
-      maxComputeWorkgroupStorageSize: 32768,
+      // Not yet: asking for GL 4.1's texture limits (16384 texels, 2048
+      // layers) and GL 4.3's compute ones makes the context GL 4.6, and then
+      // Unity's 4.x shader variants draw Muck's 3D scene black (U, mp26).
+      // Back once that is fixed; see docs/gl-path.md.
     };
     const requiredLimits = {};
     for (const [limit, wanted] of Object.entries(want)) {

web/src/gpu-device.js

@@ -44,21 +44,10 @@ export function requestGexDevice() {
       maxStorageBuffersInVertexStage: 16,
       maxStorageBuffersInFragmentStage: 16,
       maxColorAttachmentBytesPerSample: 64,
-      // GL 4.1 wants 16384 texels a side and 2048 array layers
-      // (compute_version), and WebGPU's defaults are 8192 and 256: without
-      // asking, every context settled at 4.0 and GLSL 4.00, and Unity's
-      // #version 410 geometry stages (Muck's grass) failed to compile. GL
-      // 4.3's compute shaders want 1024 invocations a workgroup and 32 KiB
-      // of shared memory (WebGPU: 256 and 16 KiB). All clamped to the adapter.
-      maxTextureDimension1D: 16384,
-      maxTextureDimension2D: 16384,
-      maxTextureDimension3D: 2048,
-      maxTextureArrayLayers: 2048,
-      maxComputeInvocationsPerWorkgroup: 1024,
-      maxComputeWorkgroupSizeX: 1024,
-      maxComputeWorkgroupSizeY: 1024,
-      maxComputeWorkgroupSizeZ: 64,
-      maxComputeWorkgroupStorageSize: 32768,
+      // Not yet: asking for GL 4.1's texture limits (16384 texels, 2048
+      // layers) and GL 4.3's compute ones makes the context GL 4.6, and then
+      // Unity's 4.x shader variants draw Muck's 3D scene black (U, mp26).
+      // Back once that is fixed; see docs/gl-path.md.
     };
     const requiredLimits = {};
     for (const [limit, wanted] of Object.entries(want)) {