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| 1 // Copyright 2016 The Chromium Authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. |
| 4 |
| 5 #ifndef CC_TILES_DECODED_IMAGE_TRACKER_H_ |
| 6 #define CC_TILES_DECODED_IMAGE_TRACKER_H_ |
| 7 |
| 8 #include <utility> |
| 9 #include <vector> |
| 10 |
| 11 #include "base/bind.h" |
| 12 #include "cc/base/cc_export.h" |
| 13 #include "cc/tiles/image_controller.h" |
| 14 |
| 15 class SkImage; |
| 16 |
| 17 namespace cc { |
| 18 |
| 19 // This class is the main interface for the rest of the system to request |
| 20 // decodes. It is responsible for keeping the decodes locked for a number of |
| 21 // frames, specified as |kNumFramesToLock| in the implementation file. |
| 22 // |
| 23 // Note that it is safe to replace ImageController's cache without doing |
| 24 // anything special with this class, since it retains only ids to the decode |
| 25 // requests. When defunct ids are then used to try and unlock the image, they |
| 26 // are silently ignored. |
| 27 class CC_EXPORT DecodedImageTracker { |
| 28 public: |
| 29 DecodedImageTracker(); |
| 30 ~DecodedImageTracker(); |
| 31 |
| 32 void QueueImageDecode(sk_sp<const SkImage> image, |
| 33 const base::Closure& callback); |
| 34 void NotifyFrameFinished(); |
| 35 |
| 36 private: |
| 37 friend class TileManager; |
| 38 friend class DecodedImageTrackerTest; |
| 39 |
| 40 void set_image_controller(ImageController* controller) { |
| 41 image_controller_ = controller; |
| 42 } |
| 43 |
| 44 void ImageDecodeFinished(const base::Closure& callback, |
| 45 ImageController::ImageDecodeRequestId id); |
| 46 |
| 47 ImageController* image_controller_ = nullptr; |
| 48 std::vector<std::pair<ImageController::ImageDecodeRequestId, int>> |
| 49 locked_images_; |
| 50 |
| 51 DISALLOW_COPY_AND_ASSIGN(DecodedImageTracker); |
| 52 }; |
| 53 |
| 54 } // namespace cc |
| 55 |
| 56 #endif // CC_TILES_DECODED_IMAGE_TRACKER_H_ |
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