Commit f6fb6da87dc4db174ba8a808010f511a29a4201b
2020-08-19T21:04:35
Revert "Feedback Loop Redesign 2/3: Track bound FBOs in Texture." This reverts commit 699bcde0b729853f33474941a313f6d5c9e63faf. Reason for revert: Breaking GLES2WebGLDecoderPassthroughTest.DrawArraysInstancedANGLEEnablement. Here is a sample build : https://ci.chromium.org/p/chromium/builders/ci/Win10%20FYI%20x64%20Release%20%28NVIDIA%29/4240 Original change's description: > Feedback Loop Redesign 2/3: Track bound FBOs in Texture. > > Currently we track feedback loops by counting the times a Texture is > bound as a sampler or image in a particular context. This is a bit > tricky because Texture bindings change frequently. Relative to the > number of times we need to check for a feedback loop this causes excess > overhead. > > Usually Framebuffers have a low number of Textures bound (in many cases > just 1). And Textures aren't usually bound to many different FBOs. So > instead of counting the number of times a Texture is bound as a sampler > or image we will track the Framebuffers that the Texture is bound to. > > This CL adds a small vector class to gl::Texture which tracks all the > Framebufer Serials of its bound Framebuffers. We can use this set to > quickly check if there's any potential feedback loop between the a FBO > and this Texture. > > We also update the feedback loop check to use this new method. We will > be able to remove the old counting method when we switch the Vulkan > feedback loop handling to use the new tracking in this CL. > > Bug: angleproject:4500 > Bug: angleproject:4959 > Change-Id: I84a2f0ed8480d1da63d5879e0e56a8be4af4e735 > Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2358850 > Reviewed-by: Tobin Ehlis <tobine@google.com> > Reviewed-by: Courtney Goeltzenleuchter <courtneygo@google.com> > Reviewed-by: Jonah Ryan-Davis <jonahr@google.com> > Commit-Queue: Jamie Madill <jmadill@chromium.org> TBR=tobine@google.com,courtneygo@google.com,jonahr@google.com,jmadill@chromium.org Change-Id: Ica795036895652add37ac8ed319031f9d5a321ac No-Presubmit: true No-Tree-Checks: true No-Try: true Bug: angleproject:4500 Bug: angleproject:4959 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2365077 Reviewed-by: Khushal <khushalsagar@chromium.org> Commit-Queue: Khushal <khushalsagar@chromium.org>