Commit 3d39b7c5eab88c420d982155ffbb6181c678ceea
2021-01-16T00:15:14
Revert "Vulkan: Generate gl_Position pre-rotation in SPIR-V" This reverts commit 0f86b196ffaffeeee3460e3188f20a7ac120796d. Reason for revert: Breaks pre-rotation for all apps, so they are displayed in portrait instead of landscape. Original change's description: > Vulkan: Generate gl_Position pre-rotation in SPIR-V > > Instead of having the translator output pre-rotation code in the vertex > stage based on a specialization constant, this change makes the SPIR-V > transformer perform pre-rotation of gl_Position on the last geometry > stage. > > An alternative solution would be to generate pre-rotation code in the > translator in every geometry stage, each controlled by a separate > specialization constant. This change avoids unnecessary modifications > to earlier stages. The generated shaders are also smaller, as they > don't contain a mat2[8] pre-rotation constant matrix. The SPIR-V > transformer knows the pre-rotation at transformation time, so it can > simply use swizzles to achieve the same results. > > This also ties in with upcoming changes which move gl_Position.z > correction to the last geometry shader stage, which is trivially done > piggy-backing on the infrastructure in this change. > > Bug: angleproject:5478 > Change-Id: I9d5d9d19f3ccda665f5504368ce5ddfa5f383faf > Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2598584 > Commit-Queue: Shahbaz Youssefi <syoussefi@chromium.org> > Reviewed-by: Charlie Lao <cclao@google.com> > Reviewed-by: Jamie Madill <jmadill@chromium.org> TBR=syoussefi@chromium.org,jmadill@chromium.org,cclao@google.com Change-Id: I81f237fa6b10c7d59831363bee8999e7ad2f09be No-Presubmit: true No-Tree-Checks: true No-Try: true Bug: angleproject:5478 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2633694 Reviewed-by: Tim Van Patten <timvp@google.com> Commit-Queue: Tim Van Patten <timvp@google.com>