kc3-lang/angle

2020-10-16T22:19:20

Revert "Vulkan: Fold deferred clears into current clears" This reverts commit e416c92a81c9ef01d633ec5c05e81c2551b6c5d6. Reason for revert: Reverted parent: https://chromium-review.googlesource.com/c/angle/angle/+/2481612 Original change's description: > Vulkan: Fold deferred clears into current clears > > If there are clears prior to a glClear() call, those clears were > flushed (starting a new render pass) and then the clear call's clears > would be applied (essentially modifying the loadOps of said render > pass). > > The main downside of the above is that the current glClear() clears > don't get a chance to be deferred. This was observed in Chrome which > clears an attachment with an emulated format, then switches > framebuffers. > > Additionally, if the render pass had already been started, the deferred > clears could have become inlined instead of breaking the render pass. > Although, it's unlikely for there to be deferred clears when the render > pass is already open. > > This change first identifies which clears need to go through the draw > path (scissored, masked or as workaround for driver bug). It merges the > rest of the clears (that don't need the draw path) with the deferred > clears. It then checks deferred clears and applies them by either: > > - vkCmdClearAttachments if mid RP > - Start a new render pass and use loadOps, if any draw-based clear needs > to follow. > - Modify current RP loadOps / defer the clear > > Afterwards, the draw-based clears are applied. > > Bug: angleproject:4836 > Change-Id: Id4992c78983b199734508c9d4bb18ed3195c91ec > Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2455167 > Commit-Queue: Shahbaz Youssefi <syoussefi@chromium.org> > Reviewed-by: Jamie Madill <jmadill@chromium.org> > Reviewed-by: Charlie Lao <cclao@google.com> TBR=syoussefi@chromium.org,jmadill@chromium.org,cclao@google.com Change-Id: I85733b3594409df9b96e3d5b34933522c97c42cf No-Presubmit: true No-Tree-Checks: true No-Try: true Bug: angleproject:4836 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2481613 Reviewed-by: Tim Van Patten <timvp@google.com> Commit-Queue: Tim Van Patten <timvp@google.com>