kc3-lang/angle

2024-07-26T12:44:23

GL: Disable heavily emulated extensions for non-WebGL. The multidraw and base vertex base instance extensions are heavily emulated in ANGLE's GL backend, manipulating vertex arrays multiple times per draw. This is often a performance improvement for deep pipelines such as WebGL but slower for shallow stacks like Chrome's rasterization. Mark these extensions as "emulated" and disable them in the frontend for non-WebGL contexts. Only EXT_base_instance can have true native support. Add a frontend feature to re-enable these extensions and use it in the existing end2end tests. Bug: angleproject:355645824 Change-Id: I897559fb270e2aa0f476d7784d25d97574e28f43 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/5743837 Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org> Commit-Queue: Geoff Lang <geofflang@chromium.org>