Detect empty clip when difference op clips everything
Change-Id: Ifbe0f3ae6e01d65f18351903da8aef63170ce6c7
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/294457
Commit-Queue: Michael Ludwig <michaelludwig@google.com>
Auto-Submit: Michael Ludwig <michaelludwig@google.com>
Reviewed-by: Brian Salomon <bsalomon@google.com>
diff --git a/src/gpu/GrReducedClip.cpp b/src/gpu/GrReducedClip.cpp
index 313f1ff..93c01b6 100644
--- a/src/gpu/GrReducedClip.cpp
+++ b/src/gpu/GrReducedClip.cpp
@@ -115,6 +115,13 @@
// Now that we have determined the bounds to use and filtered out the trivial cases, call
// the helper that actually walks the stack.
this->walkStack(stack, tighterQuery);
+
+ if (fInitialState == InitialState::kAllOut && fMaskElements.isEmpty()) {
+ // The clip starts with no coverage and there are no elements to add coverage with
+ // expanding ops. We ignore the AAClipRectGenID since it is an implied intersection.
+ this->makeEmpty();
+ return;
+ }
}
if (SK_InvalidGenID != fAAClipRectGenID && // Is there an AA clip rect?