Devirtualize read/write pixels on surface.

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"
 
 #include "SkBitmap.h"
 #include "SkGr.h"
 #include "SkImageEncoder.h"
 #include <stdio.h>
 
+bool GrSurface::writePixels(int left, int top, int width, int height,
+                            GrPixelConfig config, const void* buffer, size_t rowBytes,
+                            uint32_t pixelOpsFlags) {
+    // go through context so that all necessary flushing occurs
+    GrContext* context = this->getContext();
+    if (NULL == context) {
+        return false;
+    }
+    return context->writeSurfacePixels(this, left, top, width, height, config, buffer, rowBytes,
+                                       pixelOpsFlags);
+}
+
+bool GrSurface::readPixels(int left, int top, int width, int height,
+                           GrPixelConfig config, void* buffer, size_t rowBytes,
+                           uint32_t pixelOpsFlags) {
+    // go through context so that all necessary flushing occurs
+    GrContext* context = this->getContext();
+    if (NULL == context) {
+        return false;
+    }
+    GrRenderTarget* target = this->asRenderTarget();
+    if (target) {
+        return context->readRenderTargetPixels(target, left, top, width, height, config, buffer,
+                                               rowBytes, pixelOpsFlags);
+    }
+    return false;
+}
+
 SkImageInfo GrSurface::info() const {
     SkColorType colorType;
     if (!GrPixelConfig2ColorType(this->config(), &colorType)) {
         sk_throw();
     }
     return SkImageInfo::Make(this->width(), this->height(), colorType, kPremul_SkAlphaType);
 }
 
 // TODO: This should probably be a non-member helper function. It might only be needed in
 // debug or developer builds.
@@ skipping 67 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();
     }
 }