new image from backend desc

src/image/SkImage.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 "SkBitmap.h"
 #include "SkCanvas.h"
 #include "SkImageGenerator.h"
@@ skipping 151 matching lines @@
     surface->getCanvas()->scale(newWidth / src.width(), newHeight / src.height());
     surface->getCanvas()->translate(-src.x(), -src.y());
 
     SkPaint paint;
     paint.setXfermodeMode(SkXfermode::kSrc_Mode);
     paint.setFilterQuality(quality);
     surface->getCanvas()->drawImage(this, 0, 0, &paint);
     return surface->newImageSnapshot();
 }
 
+//////////////////////////////////////////////////////////////////////////////////////
 
+#if !SK_SUPPORT_GPU
+
+SkImage* SkImage::NewFromTexture(GrContext*, const GrBackendTextureDesc&) { return NULL; }
+SkImage* SkImage::NewFromTextureCopy(GrContext*, const GrBackendTextureDesc&) { return NULL; }
+
+#endif