Create GrOptDrawState before recording draw in GrInOrderDrawBuffer
Review URL: https://codereview.chromium.org/739673002
diff --git a/src/gpu/GrPendingProgramElement.h b/src/gpu/GrPendingProgramElement.h
new file mode 100644
index 0000000..7285ecb
--- /dev/null
+++ b/src/gpu/GrPendingProgramElement.h
@@ -0,0 +1,56 @@
+/*
+ * Copyright 2014 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#ifndef GrPendingProgramElement_DEFINED
+#define GrPendingProgramElement_DEFINED
+
+#include "SkRefCnt.h"
+#include "GrTypes.h"
+
+/**
+ * Helper for owning a pending execution on a GrProgramElement. Using this rather than ref allows
+ * resources that are owned by the program element to be correctly tracked as having pending reads
+ * and writes rather than refs.
+ */
+template <typename T> class GrPendingProgramElement : SkNoncopyable {
+public:
+ GrPendingProgramElement() : fObj(NULL) { };
+
+ // Adds a pending execution on obj.
+ explicit GrPendingProgramElement(T* obj) : fObj(obj) {
+ if (obj) {
+ obj->addPendingExecution();
+ }
+ }
+
+ void reset(T* obj) {
+ if (obj) {
+ obj->addPendingExecution();
+ }
+ if (fObj) {
+ fObj->completedExecution();
+ }
+ fObj = obj;
+ }
+
+ T* get() const { return fObj; }
+ operator T*() { return fObj; }
+
+ T *operator->() const { return fObj; }
+
+ ~GrPendingProgramElement() {
+ if (fObj) {
+ fObj->completedExecution();
+ }
+ }
+
+private:
+ T* fObj;
+
+ typedef SkNoncopyable INHERITED;
+};
+#endif