Add GrPrepareCallback, always run at the start of flush

This is like an op, but only has one virtual, and always runs before
any ops prepare. To be used in threaded software mask rendering
(to schedule ASAP uploads).

Bug: skia:
Change-Id: I647482e2472d7321f3685e5bdbe49e10ac59c0b1
Reviewed-on: https://skia-review.googlesource.com/37160
Reviewed-by: Brian Salomon <bsalomon@google.com>
Commit-Queue: Brian Osman <brianosman@google.com>

1 files changed, 9 insertions, 0 deletions

diff --git a/src/gpu/GrOpList.cpp b/src/gpu/GrOpList.cpp
index 5a9a1bdad8..c87d520aec 100644
--- a/src/gpu/GrOpList.cpp
+++ b/src/gpu/GrOpList.cpp
@@ -54,9 +54,18 @@ void GrOpList::reset() {
     }
 
     fTarget.reset();
+    fPrepareCallbacks.reset();
     fAuditTrail = nullptr;
 }
 
+void GrOpList::prepare(GrOpFlushState* flushState) {
+    for (int i = 0; i < fPrepareCallbacks.count(); ++i) {
+        (*fPrepareCallbacks[i])(flushState);
+    }
+
+    this->onPrepare(flushState);
+}
+
 // Add a GrOpList-based dependency
 void GrOpList::addDependency(GrOpList* dependedOn) {
     SkASSERT(!dependedOn->dependsOn(this));  // loops are bad