Gpu Image Decode Controller

cc/tiles/software_image_decode_controller.h

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CC_TILES_SOFTWARE_IMAGE_DECODE_CONTROLLER_H_
 #define CC_TILES_SOFTWARE_IMAGE_DECODE_CONTROLLER_H_
 
 #include <stdint.h>
 
 #include <unordered_map>
@@ skipping 93 matching lines @@
 
   // ImageDecodeController overrides.
   bool GetTaskForImageAndRef(const DrawImage& image,
                              uint64_t prepare_tiles_id,
                              scoped_refptr<ImageDecodeTask>* task) override;
   void UnrefImage(const DrawImage& image) override;
   DecodedDrawImage GetDecodedImageForDraw(const DrawImage& image) override;
   void DrawWithImageFinished(const DrawImage& image,
                              const DecodedDrawImage& decoded_image) override;
   void ReduceCacheUsage() override;
+  // Software doesn't keep outstanding images pinned, so this is a no-op.
+  void SetShouldAggressivelyFreeResources(
+      bool aggressively_free_resources) override {}
 
   // Decode the given image and store it in the cache. This is only called by an
   // image decode task from a worker thread.
   void DecodeImage(const ImageKey& key, const DrawImage& image);
 
   void RemovePendingTask(const ImageKey& key);
 
  private:
   // DecodedImage is a convenience storage for discardable memory. It can also
   // construct an image out of SkImageInfo and stored discardable memory.
@@ skipping 100 matching lines @@
   // image the first time we see it. This mimics the previous behavior and
   // should over time change as the compositor starts to handle more cases.
   std::unordered_set<uint32_t> prerolled_images_;
 
   ResourceFormat format_;
 };
 
 }  // namespace cc
 
 #endif  // CC_TILES_SOFTWARE_IMAGE_DECODE_CONTROLLER_H_