1 #ifndef DALI_TOOLKIT_INTERNAL_ROLLING_IMAGE_CACHE_H
2 #define DALI_TOOLKIT_INTERNAL_ROLLING_IMAGE_CACHE_H
5 * Copyright (c) 2021 Samsung Electronics Co., Ltd.
7 * Licensed under the Apache License, Version 2.0 (the "License");
8 * you may not use this file except in compliance with the License.
9 * You may obtain a copy of the License at
11 * http://www.apache.org/licenses/LICENSE-2.0
13 * Unless required by applicable law or agreed to in writing, software
14 * distributed under the License is distributed on an "AS IS" BASIS,
15 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
16 * See the License for the specific language governing permissions and
17 * limitations under the License.
22 #include <dali-toolkit/internal/visuals/animated-image/image-cache.h>
23 #include <dali-toolkit/internal/visuals/texture-manager-impl.h>
24 #include <dali/devel-api/common/circular-queue.h>
33 * Class to manage a rolling cache of images, where the cache size
34 * is smaller than the total number of images.
36 class RollingImageCache : public ImageCache, public TextureUploadObserver
41 * @param[in] textureManager The texture manager
42 * @param[in] urlList List of urls to cache
43 * @param[in] maskingData Masking data to be applied.
44 * @param[in] observer FrameReady observer
45 * @param[in] cacheSize The size of the cache
46 * @param[in] batchSize The size of a batch to load
47 * @param[in] interval Time interval between each frame
49 * This will start loading textures immediately, according to the
50 * batch and cache sizes.
52 RollingImageCache(TextureManager& textureManager,
54 TextureManager::MaskingDataPointer& maskingData,
55 ImageCache::FrameReadyObserver& observer,
63 ~RollingImageCache() override;
66 * @copydoc Internal::ImageCache::Frame()
68 TextureSet Frame(uint32_t frameIndex) override;
71 * @copydoc Internal::ImageCache::FirstFrame()
73 TextureSet FirstFrame() override;
76 * @copydoc Internal::ImageCache::GetFrameInterval()
78 uint32_t GetFrameInterval(uint32_t frameIndex) const override;
81 * @copydoc Internal::ImageCache::GetCurrentFrameIndex()
83 int32_t GetCurrentFrameIndex() const override;
86 * @copydoc Internal::ImageCache::GetTotalFrameCount()
88 int32_t GetTotalFrameCount() const override;
91 * @copydoc Internal::ImageCache::GetLoadState()
93 TextureManager::LoadState GetLoadState() const override;
96 * @copydoc Internal::ImageCache::ClearCache()
98 void ClearCache() override;
102 * @brief Check whether the front frame is ready or not.
104 * @return true if the front frame is ready
106 bool IsFrontReady() const;
109 * @brief Load the next batch of images
111 * @param[in] frameIndex starting frame index of batch to be loaded.
113 void LoadBatch(uint32_t frameIndex);
116 * @brief Find the matching image frame, and set it to ready
118 * @param[in] textureId texture id to be marked as ready.
119 * @param[in] loadSuccess true if the frame loading is succeeded.
121 void SetImageFrameReady(TextureManager::TextureId textureId, bool loadSuccess);
124 * @brief Get the texture set of the front frame.
126 * @return the texture set of the front of Cache.
128 TextureSet GetFrontTextureSet() const;
131 * @brief Get the texture id of the given index
133 * @param[in] index index of the queue.
135 TextureManager::TextureId GetCachedTextureId(int index) const;
138 * @brief Check if the front frame has become ready - if so, inform observer
140 * @param[in] wasReady Readiness before call.
142 void CheckFrontFrame(bool wasReady);
145 * @brief Pop front entity of Cache.
147 void PopFrontCache();
152 * @copydoc Toolkit::TextureUploadObserver::UploadComplete()
157 TextureSet textureSet,
159 const Vector4& atlasRect,
160 bool preMultiplied) override;
164 * Secondary class to hold readiness and index into url
168 unsigned int mUrlIndex = 0u;
172 std::vector<UrlStore>& mImageUrls;
173 std::vector<TextureManager::LoadState> mLoadStates;
174 CircularQueue<ImageFrame> mQueue;
177 } // namespace Internal
178 } // namespace Toolkit