skia /
skia /
3b923a880bc0855772daffd95b5728795f515d5f Improve scissor state tracking in GrRTC
At a low level, this changes GrScissorState from a rect+bool to a rect+size.
The scissor test is considered enablebd if the rect does not fill the
device bounds rect specified by the size. This has a number of benefits:
1. We can always access the scissor rect and know that it will be
restricted to the render target dimensions.
2. It helps consolidate code that previously had to test the scissor rect
and render target bounds separately.
3. The clear operations can now match the proper backing store dimensions
of the render target.
4. It makes it easier to reason about scissors applying to the logical
dimensions of the render target vs. its backing store dimensions.
Originally, I was going to have the extra scissor guards for the logical
dimensions be added in a separate CL (with the cleanup for
attemptQuadOptimization). However, it became difficult to ensure correct
behavior respecting the vulkan render pass bounds without applying this
new logic at the same time.
So now, with this CL, GrAppliedClips are sized to the backing store
dimensions of the render target. GrOpsTasks also clip bounds to the
backing store dimensions instead of the logical dimensions (which seems
more correct since that's where the auto-clipping happens). Then when
we convert a GrClip to a GrAppliedClip, the GrRTC automatically enforces
the logical dimensions scissor if we have stencil settings (to ensure
the padded pixels don't get corrupted). It also may remove the scissor
if the draw was just a color buffer update.
Change-Id: I75671c9cc921f4696b1dd5231e02486090aa4282
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/290654
Commit-Queue: Michael Ludwig <michaelludwig@google.com>
Reviewed-by: Brian Salomon <bsalomon@google.com>
29 files changed
