kc3-lang/angle

2020-04-03T18:31:22

No-Op draws when no active VS and/or FS is present Re-land CL with WebGL fixes: This required some extra pointer checking during validation to handle the fact that a Program and/or ProgramExecutable may not be present when attempting to draw. This isn't an error, just undefined behavior, which we (eventually) treat as a no-op. According to the OpenGL ES 3.1 spec: 7.3. PROGRAM OBJECTS If there is no active program for the vertex or fragment shader stages, the results of vertex and fragment shader execution will respectively be undefined. However, this is not an error. To handle this, if no VS or FS is present in the active Program/PPO, we will no-op the draw command. Bug: angleproject:3570 Test: KHR-GLES31.core.sepshaderobjs.StateInteraction Change-Id: I70d688bf344a78cf3b4fd66c995ae03ce4b9b807 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2185156 Reviewed-by: Courtney Goeltzenleuchter <courtneygo@google.com> Reviewed-by: Jamie Madill <jmadill@chromium.org> Commit-Queue: Tim Van Patten <timvp@google.com>