commit 9a0da785a5ba1011b9858f1b4fe0a608d8030172
author Brian Salomon <bsalomon@google.com> Fri Apr 23 13:41:55 2021 -0400
committer Skia Commit-Bot <skia-commit-bot@chromium.org> Fri Apr 23 19:38:13 2021 +0000
tree 21d0dc099db3618f1832fc45481875395213a346
parent 3befaf23a9722a362c73d93e2192ea5949066312

Restore code that sets preserve stencil when breaking up SDC into
multiple opstasks.

Accidentally removed in:
https://skia-review.googlesource.com/c/skia/+/341680

Change-Id: Ic526c4ab0043c91c0446df679bfff46c00e861af
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/400536
Reviewed-by: Chris Dalton <csmartdalton@google.com>
Commit-Queue: Brian Salomon <bsalomon@google.com>

src/gpu/GrSurfaceDrawContext.cpp

diff --git a/src/gpu/GrSurfaceDrawContext.cpp b/src/gpu/GrSurfaceDrawContext.cpp
index 3363976..d8504cf 100644
--- a/src/gpu/GrSurfaceDrawContext.cpp
+++ b/src/gpu/GrSurfaceDrawContext.cpp
@@ -307,6 +307,17 @@
     ASSERT_SINGLE_OWNER
 }
 
+void GrSurfaceDrawContext::willReplaceOpsTask(GrOpsTask* prevTask, GrOpsTask* nextTask) {
+    if (prevTask && fNeedsStencil) {
+        // Store the stencil values in memory upon completion of fOpsTask.
+        prevTask->setMustPreserveStencil();
+        // Reload the stencil buffer content at the beginning of newOpsTask.
+        // FIXME: Could the topo sort insert a task between these two that modifies the stencil
+        // values?
+        nextTask->setInitialStencilContent(GrOpsTask::StencilContent::kPreserved);
+    }
+}
+
 inline GrAAType GrSurfaceDrawContext::chooseAAType(GrAA aa) {
     if (GrAA::kNo == aa) {
         // On some devices we cannot disable MSAA if it is enabled so we make the AA type reflect