Rename and clarify semantics of GrContext::resolveRenderTarget.

src/gpu/GrSurface.cpp

 /*
  * Copyright 2012 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "GrSurface.h"
 #include "GrSurfacePriv.h"
 
@@ skipping 64 matching lines @@
 
     return true;
 }
 
 void GrSurface::flushWrites() {
     if (!this->wasDestroyed()) {
         this->getContext()->flushSurfaceWrites(this);
     }
 }
 
+void GrSurface::prepareForExternalRead() {
+    if (!this->wasDestroyed()) {
+        this->getContext()->prepareSurfaceForExternalRead(this);
+    }
+}
+
 bool GrSurface::hasPendingRead() const {
     const GrTexture* thisTex = this->asTexture();
     if (thisTex && thisTex->internalHasPendingRead()) {
         return true;
     }
     const GrRenderTarget* thisRT = this->asRenderTarget();
     if (thisRT && thisRT->internalHasPendingRead()) {
         return true;
     }
     return false;
@@ skipping 26 matching lines @@
 bool GrSurface::isSameAs(const GrSurface* other) const {
     const GrRenderTarget* thisRT = this->asRenderTarget();
     if (thisRT) {
         return thisRT == other->asRenderTarget();
     } else {
         const GrTexture* thisTex = this->asTexture();
         SkASSERT(thisTex); // We must be one or the other
         return thisTex == other->asTexture();
     }
 }