text: /*
   * Copyright 2013 The Android Open Source Project
   *
   * Use of this source code is governed by a BSD-style license that can be
   * found in the LICENSE file.
   */
  
  #include "SkMatrix.h"
  
  #if SK_SUPPORT_GPU
  #include "GrTexture.h"
  #include "SkImageFilterUtils.h"
  #include "SkBitmap.h"
  #include "SkGrPixelRef.h"
  #include "SkGr.h"
  
  bool SkImageFilterUtils::WrapTexture(GrTexture* texture, int width, int height, SkBitmap* result) {
      SkASSERT(texture->config() == kSkia8888_GrPixelConfig);
      result->setConfig(SkBitmap::kARGB_8888_Config, width, height);
      result->setPixelRef(SkNEW_ARGS(SkGrPixelRef, (texture)))->unref();
      return true;
  }
  
  bool SkImageFilterUtils::GetInputResultGPU(SkImageFilter* filter, SkImageFilter::Proxy* proxy, const SkBitmap& src, SkBitmap* result) {
      if (!filter) {
          *result = src;
          return true;
      } else if (filter->canFilterImageGPU()) {
          return filter->filterImageGPU(proxy, src, result);
      } else {
          SkIPoint offset;
          if (filter->filterImage(proxy, src, SkMatrix(), result, &offset)) {
              if (!result->getTexture()) {
                  GrContext* context = ((GrTexture *) src.getTexture())->getContext();
                  GrTexture* resultTex = GrLockAndRefCachedBitmapTexture(context,
                      *result, NULL);
                  result->setPixelRef(new SkGrPixelRef(resultTex))->unref();
                  GrUnlockAndUnrefCachedBitmapTexture(resultTex);
              }
              return true;
          } else {
              return false;
          }
      }
  }
  #endif
  