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Hash : f691b3b5
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Date : 2020-12-02T13:11:54
Vulkan: Support PrimitivesGenerated query This query uses the Vulkan transform feedback extension. In GL, GL_TRANSFORM_FEEDBACK_PRIMITIVES_WRITTEN and GL_PRIMITIVES_GENERATED queries can be independently begun/ended. However, Vulkan requires that queries from pools of the same type can only be active one at a time. This forbids the two GL queries from being handled by two VK queries when they are simultaneously begun. This change makes these queries share their QueryHelper objects. The Vulkan transform feedback queries unconditionally retrieve both results anyway, so this is just a matter of making sure the two GL queries are merged as one when they are simultaneously used. The change fixes a number of issues as collateral: - TransformFeedbackPrimitivesWritten queries when !emulated were not released - Stashed queries were never released - If no render pass is open when a query ends, then getResult(no_wait) ended up waiting Bug: angleproject:5404 Change-Id: I8ce13ea76ffd31b3152ded7c713c6466d0315504 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2573580 Commit-Queue: Shahbaz Youssefi <syoussefi@chromium.org> Reviewed-by: Charlie Lao <cclao@google.com> Reviewed-by: Jamie Madill <jmadill@chromium.org>
