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velzieandClaude Opus 5
d4539a168d
Runs real OpenGL applications on WebGPU by putting Mesa's st/mesa in front of a new Gallium driver, gex_wgpu, which lives in the mesa submodule (now MercuryWorkshop/mesa-wink, branch gex-wgpu -- the work cannot go to upstream Mesa, and pointing the submodule at the fork is what makes a fresh clone build). Working applications: SuperTuxKart, glxgears, es2gears, es2tri, glxinfo, eglinfo, glmark2 (29 of 30 scenes), and -- through the native target -- Minecraft 1.8.8. The guest side. libGL.so.1 with GLX over EGL, so X11 GL programs run at all; client-side vertex arrays uploaded into scratch buffers rather than travelling as a bogus offset; swap pacing, which took es2gears from 17 to 60 fps and cut round trips 33x; twenty fixed-function entry points; and an extension list generated from the Khronos registry and filtered against the guest's own exports, replacing the three entries it used to report whatever the host had. A native target. gex_wgpu also builds for the desktop against Dawn, with softpipe alongside it. That turns a black canvas and a stack of wasm frame numbers into a symbolised backtrace, a GALLIUM_TRACE of the exact st/mesa call stream, and a reference implementation one environment variable away. Six driver bugs came out of the first afternoon of it, every one of them pre-existing and invisible in the browser -- see docs/gl-webgpu-handoff.md. Signals worth more than the CTS pass rate, which is why >95% of KHR-GL33 was passing while SuperTuxKart still looked wrong: tools/surface-diff.py compares two backends' surfaces and erodes the difference, so rasteriser tie-breaks on primitive edges do not drown out real ones; a refusal gate, because a declined draw is invisible in a frame that still presents at full rate; and about thirty self-checking probes under tests/integration/programs, each built twice and required to agree with native Mesa. Co-Authored-By: Claude Opus 5 <[email protected]> Claude-Session: https://claude.ai/code/session_01KPX8TWunJNt4FwqbYDgTyz