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| 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 |
| 3 // found in the LICENSE file. |
| 4 |
| 5 #ifndef CC_TILES_CHECKER_IMAGE_TRACKER_H_ |
| 6 #define CC_TILES_CHECKER_IMAGE_TRACKER_H_ |
| 7 |
| 8 #include <unordered_map> |
| 9 #include <vector> |
| 10 |
| 11 #include "cc/base/cc_export.h" |
| 12 #include "cc/playback/image_id.h" |
| 13 #include "cc/tiles/image_controller.h" |
| 14 #include "third_party/skia/include/core/SkImage.h" |
| 15 |
| 16 namespace cc { |
| 17 |
| 18 class CC_EXPORT CheckerImageTrackerClient { |
| 19 public: |
| 20 virtual ~CheckerImageTrackerClient() = default; |
| 21 |
| 22 virtual void NeedsInvalidationForCheckerImagedTiles() = 0; |
| 23 }; |
| 24 |
| 25 // CheckerImageTracker is used to track the set of images in a frame which are |
| 26 // decoded asynchronously, using the ImageDecodeService, from the rasterization |
| 27 // of tiles which depend on them. Once decoded, these images are stored for |
| 28 // invalidation on the next sync tree. TakeImagesToInvalidateOnSyncTree will |
| 29 // return this set and maintain a copy to keeps these images locked until the |
| 30 // sync tree is activated. |
| 31 // Note: It is illegal to call TakeImagesToInvalidateOnSyncTree for the next |
| 32 // sync tree until the previous tree is activated. |
| 33 class CC_EXPORT CheckerImageTracker { |
| 34 public: |
| 35 CheckerImageTracker(ImageController* image_controller, |
| 36 CheckerImageTrackerClient* client, |
| 37 bool enable_checker_imaging); |
| 38 ~CheckerImageTracker(); |
| 39 |
| 40 // Given the |images| for a tile, filters the images which will be deferred |
| 41 // asynchronously using the image decoded service, eliminating them from |
| 42 // |images| adds them to the |checkered_images| set, so they can be skipped |
| 43 // during the rasterization of this tile. |
| 44 // The entries remaining in |images| are for images for which a cached decode |
| 45 // from the image decode service is available, or which must be decoded before |
| 46 // before this tile can be rasterized. |
| 47 void FilterImagesForCheckeringForTile(std::vector<DrawImage>* images, |
| 48 ImageIdFlatSet* checkered_images, |
| 49 WhichTree tree); |
| 50 |
| 51 // Returns the set of images to invalidate on the sync tree. |
| 52 const ImageIdFlatSet& TakeImagesToInvalidateOnSyncTree(); |
| 53 |
| 54 void DidActivateSyncTree(); |
| 55 |
| 56 private: |
| 57 void DidFinishImageDecode(ImageId image_id, |
| 58 ImageController::ImageDecodeRequestId request_id); |
| 59 |
| 60 // Returns true if the decode for |image| will be deferred to the image decode |
| 61 // service and it should be be skipped during raster. |
| 62 bool ShouldCheckerImage(const sk_sp<const SkImage>& image, |
| 63 WhichTree tree) const; |
| 64 |
| 65 void ScheduleImageDecodeIfNecessary(const sk_sp<const SkImage>& image); |
| 66 |
| 67 ImageController* image_controller_; |
| 68 CheckerImageTrackerClient* client_; |
| 69 const bool enable_checker_imaging_; |
| 70 |
| 71 // A set of images which have been decoded and are pending invalidation for |
| 72 // raster on the checkered tiles. |
| 73 ImageIdFlatSet images_pending_invalidation_; |
| 74 |
| 75 // A set of images which were invalidated on the current sync tree. |
| 76 ImageIdFlatSet invalidated_images_on_current_sync_tree_; |
| 77 |
| 78 // A set of images which are currently pending decode from the image decode |
| 79 // service. |
| 80 // TODO(khushalsagar): This should be a queue that gets re-built each time we |
| 81 // do a PrepareTiles? See crbug.com/689184. |
| 82 ImageIdFlatSet pending_image_decodes_; |
| 83 |
| 84 // A set of images which have been decoded at least once from the |
| 85 // ImageDecodeService and should not be checkered again. |
| 86 // TODO(khushalsagar): Limit the size of this set. |
| 87 // TODO(khushalsagar): Plumb navigation changes here to reset this. See |
| 88 // crbug.com/693228. |
| 89 std::unordered_set<ImageId> images_decoded_once_; |
| 90 |
| 91 // A map of image id to image decode request id for images to be unlocked. |
| 92 std::unordered_map<ImageId, ImageController::ImageDecodeRequestId> |
| 93 image_id_to_decode_request_id_; |
| 94 |
| 95 base::WeakPtrFactory<CheckerImageTracker> weak_factory_; |
| 96 }; |
| 97 |
| 98 } // namespace cc |
| 99 |
| 100 #endif // CC_TILES_CHECKER_IMAGE_TRACKER_H_ |
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