Make "priv" classes for GrTexure and GrSurface.

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>
 
 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.
 bool GrSurface::savePixels(const char* filename) {
     SkBitmap bm;
     if (!bm.tryAllocPixels(SkImageInfo::MakeN32Premul(this->width(), this->height()))) {
         return false;
     }
 
-    bool result = readPixels(0, 0, this->width(), this->height(), kSkia8888_GrPixelConfig,
-                             bm.getPixels());
+    bool result = this->readPixels(0, 0, this->width(), this->height(), kSkia8888_GrPixelConfig,
+                                   bm.getPixels());
     if (!result) {
         SkDebugf("------ failed to read pixels for %s\n", filename);
         return false;
     }
 
     // remove any previous version of this file
     remove(filename);
 
     if (!SkImageEncoder::EncodeFile(filename, bm, SkImageEncoder::kPNG_Type, 100)) {
         SkDebugf("------ failed to encode %s\n", filename);
@@ skipping 32 matching lines @@
     const GrTexture* thisTex = this->asTexture();
     if (thisTex && thisTex->internalHasPendingIO()) {
         return true;
     }
     const GrRenderTarget* thisRT = this->asRenderTarget();
     if (thisRT && thisRT->internalHasPendingIO()) {
         return true;
     }
     return false;
 }
+
+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();
+    }
+}