Commit dae3c851309b587b299d135bdf07b92438dade7f
2025-03-14T11:44:53
Vulkan: Bake non-shader state into linked pipeline When using VK_EXT_graphics_pipeline_library, previously ANGLE would create three pipelines libraries: * The Shaders library was created based on the GL program's shaders + a few static states. This typically hit the program's own pipeline's cache that was warmed up during link. * The VertexInput and FragmentOutput libraries were created at draw time, which used the global pipeline cache At draw time, immediately after creating the non-Shaders libraries, the three libraries were linked into the final pipeline to be used by the draw call. This caused an inefficiency; because the non-Shaders libraries were created independently from the Shaders library, they had to be compiled pessimistically, for example because they could not be optimized to take into account the precision of the fragment shader's outputs or whether any value is const (typically alpha being set to one). Given the creation of VertexInput and FragmentOutput libraries is typically quite fast (the former being no-op and dynamic state anyway), this change removes the need for creating those libraries, and directly specifies the vertex input and fragment output state when creating the final pipeline out of the Shaders library. In this way, the same fragment output state can be tailored to the exact shaders it is being used with and incur a smaller overhead. In this change, the linked pipeline is cached in the GL program's pipeline cache, which is never synced to the blob cache as producing it is assumed to be fast already. Bug: angleproject:42265839 Change-Id: I8496ea37771555522bdc9de94043a1b56fa5967e Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/6354205 Commit-Queue: Shahbaz Youssefi <syoussefi@chromium.org> Reviewed-by: mohan maiya <m.maiya@samsung.com> Reviewed-by: Charlie Lao <cclao@google.com>