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1 // Copyright 2017 The Chromium Authors. All rights reserved. | 1 // Copyright 2017 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #ifndef CC_TILES_CHECKER_IMAGE_TRACKER_H_ | 5 #ifndef CC_TILES_CHECKER_IMAGE_TRACKER_H_ |
6 #define CC_TILES_CHECKER_IMAGE_TRACKER_H_ | 6 #define CC_TILES_CHECKER_IMAGE_TRACKER_H_ |
7 | 7 |
8 #include <unordered_map> | 8 #include <unordered_map> |
9 #include <vector> | 9 #include <vector> |
10 | 10 |
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51 // Called when the sync tree is activated. Each call to | 51 // Called when the sync tree is activated. Each call to |
52 // TakeImagesToInvalidateOnSyncTree() must be followed by this when the | 52 // TakeImagesToInvalidateOnSyncTree() must be followed by this when the |
53 // invalidated sync tree is activated. | 53 // invalidated sync tree is activated. |
54 void DidActivateSyncTree(); | 54 void DidActivateSyncTree(); |
55 | 55 |
56 // Called to reset the tracker state on navigation. This will release all | 56 // Called to reset the tracker state on navigation. This will release all |
57 // cached images. Setting |can_clear_decode_policy_tracking| will also result | 57 // cached images. Setting |can_clear_decode_policy_tracking| will also result |
58 // in re-checkering any images already decoded by the tracker. | 58 // in re-checkering any images already decoded by the tracker. |
59 void ClearTracker(bool can_clear_decode_policy_tracking); | 59 void ClearTracker(bool can_clear_decode_policy_tracking); |
60 | 60 |
| 61 // Informs the tracker to not checker the given image. This can be used to opt |
| 62 // out of the checkering behavior for certain images, such as ones that were |
| 63 // decoded using the img.decode api. |
| 64 // Note that if the image is already being checkered, then it will continue to |
| 65 // do so. This call is meant to be issued prior to the image appearing during |
| 66 // raster. |
| 67 void DisallowCheckeringForImage(const PaintImage& image); |
| 68 |
61 private: | 69 private: |
62 enum class DecodePolicy { | 70 enum class DecodePolicy { |
63 // The image can be decoded asynchronously from raster. When set, the image | 71 // The image can be decoded asynchronously from raster. When set, the image |
64 // is always skipped during rasterization of content that includes this | 72 // is always skipped during rasterization of content that includes this |
65 // image until it has been decoded using the decode service. | 73 // image until it has been decoded using the decode service. |
66 ASYNC, | 74 ASYNC, |
67 // The image has been decoded asynchronously once and should now be | 75 // The image has been decoded asynchronously once and should now be |
68 // synchronously rasterized with the content. | 76 // synchronously rasterized with the content or the image has been |
69 SYNC_DECODED_ONCE, | 77 // permanently vetoed from being decoded async. |
70 // The image has been permanently vetoed from being decoded async. | 78 SYNC |
71 SYNC_PERMANENT, | |
72 }; | 79 }; |
73 | 80 |
74 // Wrapper to unlock an image decode requested from the ImageController on | 81 // Wrapper to unlock an image decode requested from the ImageController on |
75 // destruction. | 82 // destruction. |
76 class ScopedDecodeHolder { | 83 class ScopedDecodeHolder { |
77 public: | 84 public: |
78 ScopedDecodeHolder(ImageController* controller, | 85 ScopedDecodeHolder(ImageController* controller, |
79 ImageController::ImageDecodeRequestId request_id) | 86 ImageController::ImageDecodeRequestId request_id) |
80 : controller_(controller), request_id_(request_id) {} | 87 : controller_(controller), request_id_(request_id) {} |
81 ~ScopedDecodeHolder() { controller_->UnlockImageDecode(request_id_); } | 88 ~ScopedDecodeHolder() { controller_->UnlockImageDecode(request_id_); } |
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116 base::Optional<PaintImage> outstanding_image_decode_; | 123 base::Optional<PaintImage> outstanding_image_decode_; |
117 | 124 |
118 // A map of ImageId to its DecodePolicy. | 125 // A map of ImageId to its DecodePolicy. |
119 std::unordered_map<PaintImage::Id, DecodePolicy> image_async_decode_state_; | 126 std::unordered_map<PaintImage::Id, DecodePolicy> image_async_decode_state_; |
120 | 127 |
121 // A map of image id to image decode request id for images to be unlocked. | 128 // A map of image id to image decode request id for images to be unlocked. |
122 std::unordered_map<PaintImage::Id, std::unique_ptr<ScopedDecodeHolder>> | 129 std::unordered_map<PaintImage::Id, std::unique_ptr<ScopedDecodeHolder>> |
123 image_id_to_decode_; | 130 image_id_to_decode_; |
124 | 131 |
125 base::WeakPtrFactory<CheckerImageTracker> weak_factory_; | 132 base::WeakPtrFactory<CheckerImageTracker> weak_factory_; |
| 133 |
| 134 DISALLOW_COPY_AND_ASSIGN(CheckerImageTracker); |
126 }; | 135 }; |
127 | 136 |
128 } // namespace cc | 137 } // namespace cc |
129 | 138 |
130 #endif // CC_TILES_CHECKER_IMAGE_TRACKER_H_ | 139 #endif // CC_TILES_CHECKER_IMAGE_TRACKER_H_ |
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