1 #ifndef DALI_TOOLKIT_TEXTURE_MANAGER_IMPL_H
2 #define DALI_TOOLKIT_TEXTURE_MANAGER_IMPL_H
5 * Copyright (c) 2017 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.
25 #include <dali/public-api/common/dali-vector.h>
26 #include <dali/public-api/object/ref-object.h>
27 #include <dali/public-api/rendering/texture-set.h>
28 #include <dali/devel-api/common/owner-container.h>
29 #include <dali/devel-api/adaptor-framework/pixel-buffer.h>
32 #include <dali-toolkit/devel-api/image-loader/async-image-loader-devel.h>
33 #include <dali-toolkit/devel-api/image-loader/image-atlas.h>
34 #include <dali-toolkit/public-api/image-loader/async-image-loader.h>
35 #include <dali-toolkit/internal/visuals/texture-upload-observer.h>
36 #include <dali-toolkit/internal/visuals/visual-url.h>
37 #include <dali-toolkit/internal/helpers/round-robin-container-view.h>
38 #include <dali-toolkit/internal/image-loader/async-image-loader-impl.h>
49 class ImageAtlasManager;
50 typedef IntrusivePtr<ImageAtlasManager> ImageAtlasManagerPtr;
53 * The TextureManager provides a common Image loading API for Visuals.
55 * The TextureManager is responsible for providing sync, async, atlased and non-atlased loads.
56 * Texture caching is provided and performed when possible.
57 * Broken Images are automatically provided on load failure.
59 class TextureManager : public ConnectionTracker
63 typedef int32_t TextureId; ///< The TextureId type. This is used as a handle to refer to a particular Texture.
64 static const int INVALID_TEXTURE_ID = -1; ///< Used to represent a null TextureId or error
67 * Whether the texture should be atlased or uploaded into it's own GPU texture
76 * Whether the pixel data should be kept in TextureManager, or uploaded for rendering
85 * Whether the texture should be loaded synchronously or asynchronously.
94 * @brief The LoadState Enumeration represents the current state of a particular Texture's life-cycle.
98 NOT_STARTED, ///< Default
99 LOADING, ///< Loading has been started, but not finished.
100 LOAD_FINISHED, ///< Loading has finished. (for CPU storage only)
101 WAITING_FOR_MASK,///< Loading has finished, but waiting for mask image
102 UPLOADED, ///< Uploaded and ready. (For GPU upload only)
103 CANCELLED, ///< Removed before loading completed
104 LOAD_FAILED ///< Async loading failed, e.g. connection problem
108 * @brief Types of reloading policies
110 enum class ReloadPolicy
112 CACHED = 0, ///< Loads cached texture if it exists.
113 FORCED ///< Forces reloading of texture.
117 * @brief Whether to multiply alpha into color channels on load
119 enum class MultiplyOnLoad
121 LOAD_WITHOUT_MULTIPLY = 0, ///< Don't modify the image
122 MULTIPLY_ON_LOAD ///< Multiply alpha into color channels on load
130 ~MaskingData() = default;
132 VisualUrl mAlphaMaskUrl;
133 TextureManager::TextureId mAlphaMaskId;
134 float mContentScaleFactor;
137 using MaskingDataPointer = std::unique_ptr<MaskingData>;
141 * Class to provide lifecycle event on destruction of texture manager.
143 struct LifecycleObserver
146 * Called shortly before the texture manager is destroyed.
148 virtual void TextureManagerDestroyed() = 0;
161 // TextureManager Main API:
164 * @brief Requests an image load of the given URL.
166 * The parameters are used to specify how the image is loaded.
167 * The observer has the UploadComplete method called when the load is ready.
169 * When the client has finished with the Texture, Remove() should be called.
171 * @param[in] url The URL of the image to load
172 * @param[in] desiredSize The size the image is likely to appear at. This can be set to 0,0 for automatic
173 * @param[in] fittingMode The FittingMode to use
174 * @param[in] samplingMode The SamplingMode to use
175 * @param[in] maskInfo Mask info structure
176 * @param[in] synchronousLoading true if the URL should be loaded synchronously
177 * @param[out] textureId, The textureId of the URL
178 * @param[out] textureRect The rectangle within the texture atlas that this URL occupies
179 * @param[in,out] atlasingStatus Set to USE_ATLAS to attempt atlasing. If atlasing fails, the image will still
180 * be loaded, and marked successful, but this will be set to false.
181 * If atlasing succeeds, this will be set to true.
182 * @param[out] loadingStatus The loading status of the texture
183 * @param[in] wrapModeU Horizontal Wrap mode
184 * @param[in] wrapModeV Vertical Wrap mode
185 * @param[in] textureObserver The client object should inherit from this and provide the "UploadCompleted" virtual.
186 * This is called when an image load completes (or fails).
187 * @param[in] atlasObserver This is used if the texture is atlased, and will be called instead of
188 * textureObserver.UploadCompleted
189 * @param[in] imageAtlasManager The atlas manager to use for atlasing textures
190 * @param[in] orientationCorrection Whether to rotate image to match embedded orientation data
191 * @param[in] reloadPolicy Forces a reload of the texture even if already cached
192 * @param[in,out] preMultiplyOnLoad True if the image color should be multiplied by it's alpha. Set to false if the
193 * image has no alpha channel
195 * @return The texture set containing the image, or empty if still loading.
198 TextureSet LoadTexture( const VisualUrl& url,
199 Dali::ImageDimensions desiredSize,
200 Dali::FittingMode::Type fittingMode,
201 Dali::SamplingMode::Type samplingMode,
202 const MaskingDataPointer& maskInfo,
203 bool synchronousLoading,
204 TextureManager::TextureId& textureId,
205 Vector4& textureRect,
206 bool& atlasingStatus,
208 Dali::WrapMode::Type wrapModeU,
209 Dali::WrapMode::Type wrapModeV,
210 TextureUploadObserver* textureObserver,
211 AtlasUploadObserver* atlasObserver,
212 ImageAtlasManagerPtr imageAtlasManager,
213 bool orientationCorrection,
214 TextureManager::ReloadPolicy reloadPolicy,
215 MultiplyOnLoad& preMultiplyOnLoad );
218 * @brief Requests an image load of the given URL.
220 * The parameters are used to specify how the image is loaded.
221 * The observer has the UploadComplete method called when the load is ready.
223 * When the client has finished with the Texture, Remove() should be called.
225 * @param[in] url The URL of the image to load
226 * @param[in] desiredSize The size the image is likely to appear at. This can be set to 0,0 for automatic
227 * @param[in] fittingMode The FittingMode to use
228 * @param[in] samplingMode The SamplingMode to use
229 * @param[in] useAtlasing Set to USE_ATLAS to attempt atlasing. If atlasing fails, the image will still be loaded, and marked successful,
230 * but "useAtlasing" will be set to false in the "UploadCompleted" callback from the TextureManagerUploadObserver.
231 * @param[in] observer The client object should inherit from this and provide the "UploadCompleted" virtual.
232 * This is called when an image load completes (or fails).
233 * @param[in] orientationCorrection Whether to rotate image to match embedded orientation data
234 * @param[in] reloadPolicy Forces a reload of the texture even if already cached
235 * @param[in,out] preMultiplyOnLoad True if the image color should be multiplied by it's alpha. Set to false if the image has no alpha channel
236 * @return A TextureId to use as a handle to reference this Texture
238 TextureId RequestLoad( const VisualUrl& url,
239 const ImageDimensions desiredSize,
240 FittingMode::Type fittingMode,
241 Dali::SamplingMode::Type samplingMode,
242 const UseAtlas useAtlasing,
243 TextureUploadObserver* observer,
244 bool orientationCorrection,
245 TextureManager::ReloadPolicy reloadPolicy,
246 MultiplyOnLoad& preMultiplyOnLoad );
249 * @brief Requests an image load of the given URL, when the texture has
250 * have loaded, it will perform a blend with the image mask, and upload
251 * the blended texture.
253 * The parameters are used to specify how the image is loaded.
254 * The observer has the UploadComplete method called when the load is ready.
256 * When the client has finished with the Texture, Remove() should be called.
258 * @param[in] url The URL of the image to load
259 * @param[in] maskTextureId The texture id of an image to mask this with
260 * (can be INVALID if no masking required)
261 * @param[in] contentScale The scale factor to apply to the image before masking
262 * @param[in] desiredSize The size the image is likely to appear at. This can be set to 0,0 for automatic
263 * @param[in] fittingMode The FittingMode to use
264 * @param[in] samplingMode The SamplingMode to use
265 * @param[in] useAtlasing Set to USE_ATLAS to attempt atlasing. If atlasing fails, the image will still
266 * be loaded, and marked successful,
267 * but "useAtlasing" will be set to false in the "UploadCompleted" callback from
268 * the TextureManagerUploadObserver.
269 * @param[in] cropToMask Only used with masking, this will crop the scaled image to the mask size.
270 * If false, then the mask will be scaled to fit the image before being applied.
271 * @param[in] observer The client object should inherit from this and provide the "UploadCompleted"
273 * This is called when an image load completes (or fails).
274 * @param[in] orientationCorrection Whether to rotate image to match embedded orientation data
275 * @param[in] reloadPolicy Forces a reload of the texture even if already cached
276 * @param[in] preMultiplyOnLoad True if the image color should be multiplied by it's alpha. Set to false if the
277 * image has no alpha channel
278 * @return A TextureId to use as a handle to reference this Texture
280 TextureId RequestLoad( const VisualUrl& url,
281 TextureId maskTextureId,
283 const ImageDimensions desiredSize,
284 FittingMode::Type fittingMode,
285 Dali::SamplingMode::Type samplingMode,
286 const UseAtlas useAtlasing,
288 TextureUploadObserver* observer,
289 bool orientationCorrection,
290 TextureManager::ReloadPolicy reloadPolicy,
291 MultiplyOnLoad& preMultiplyOnLoad );
294 * Requests a masking image to be loaded. This mask is not uploaded to GL,
295 * instead, it is stored in CPU memory, and can be used for CPU blending.
297 TextureId RequestMaskLoad( const VisualUrl& maskUrl );
300 * @brief Remove a Texture from the TextureManager.
302 * Textures are cached and therefore only the removal of the last
303 * occurrence of a Texture will cause its removal internally.
305 * @param[in] textureId The ID of the Texture to remove.
307 void Remove( const TextureManager::TextureId textureId );
310 * Get the visualUrl associated with the texture id
312 const VisualUrl& GetVisualUrl( TextureId textureId );
315 * @brief Get the current state of a texture
316 * @param[in] textureId The texture id to query
317 * @return The loading state if the texture is valid, or NOT_STARTED if the textureId
320 LoadState GetTextureState( TextureId textureId );
323 * @brief Get the associated texture set if the texture id is valid
324 * @param[in] textureId The texture Id to look up
325 * @return the associated texture set, or an empty handle if textureId is not valid
327 TextureSet GetTextureSet( TextureId textureId );
330 * Adds an external texture to the texture manager
331 * @param[in] texture The texture to add
332 * @return string containing the URL for the texture
334 std::string AddExternalTexture( TextureSet& texture );
337 * Removes an external texture from texture manager
338 * @param[in] url The string containing the texture to remove
339 * @return handle to the texture
341 TextureSet RemoveExternalTexture( const std::string& url );
344 * Add an observer to the object.
345 * @param[in] observer The observer to add.
347 void AddObserver( TextureManager::LifecycleObserver& observer );
350 * Remove an observer from the object
351 * @pre The observer has already been added.
352 * @param[in] observer The observer to remove.
354 void RemoveObserver( TextureManager::LifecycleObserver& observer );
359 * @brief Requests an image load of the given URL, when the texture has
360 * have loaded, if there is a valid maskTextureId, it will perform a
361 * CPU blend with the mask, and upload the blend texture.
363 * The parameters are used to specify how the image is loaded.
364 * The observer has the UploadComplete method called when the load is ready.
366 * When the client has finished with the Texture, Remove() should be called.
368 * @param[in] url The URL of the image to load
369 * @param[in] maskTextureId The texture id of an image to use as a mask. If no mask is required, then set
370 * to INVALID_TEXTURE_ID
371 * @param[in] contentScale The scaling factor to apply to the content when masking
372 * @param[in] desiredSize The size the image is likely to appear at. This can be set to 0,0 for automatic
373 * @param[in] fittingMode The FittingMode to use
374 * @param[in] samplingMode The SamplingMode to use
375 * @param[in] useAtlasing Set to USE_ATLAS to attempt atlasing. If atlasing fails, the image will still be
376 * loaded, and marked successful, but "useAtlasing" will be set to false in the
377 * "UploadCompleted" callback from the TextureManagerUploadObserver.
378 * @param[in] cropToMask Whether to crop the target after masking, or scale the mask to the image before
380 * @param[in] storageType, Whether the pixel data is stored in the cache or uploaded to the GPU
381 * @param[in] observer The client object should inherit from this and provide the "UploadCompleted"
383 * This is called when an image load completes (or fails).
384 * @param[in] orientationCorrection Whether to rotate image to match embedded orientation data
385 * @param[in] reloadPolicy Forces a reload of the texture even if already cached
386 * @param[in] preMultiplyOnLoad True if the image color should be multiplied by it's alpha. Set to false if
388 * @return A TextureId to use as a handle to reference this Texture
390 TextureId RequestLoadInternal(
391 const VisualUrl& url,
392 TextureId maskTextureId,
394 const ImageDimensions desiredSize,
395 FittingMode::Type fittingMode,
396 Dali::SamplingMode::Type samplingMode,
399 StorageType storageType,
400 TextureUploadObserver* observer,
401 bool orientationCorrection,
402 TextureManager::ReloadPolicy reloadPolicy,
403 MultiplyOnLoad& preMultiplyOnLoad );
406 * @brief Get the current state of a texture
407 * @param[in] textureId The texture id to query
408 * @return The loading state if the texture is valid, or NOT_STARTED if the textureId
411 LoadState GetTextureStateInternal( TextureId textureId );
413 typedef size_t TextureHash; ///< The type used to store the hash used for Texture caching.
416 * @brief This struct is used to manage the life-cycle of Texture loading and caching.
420 TextureInfo( TextureId textureId,
421 TextureId maskTextureId,
422 const VisualUrl& url,
423 ImageDimensions desiredSize,
425 FittingMode::Type fittingMode,
426 Dali::SamplingMode::Type samplingMode,
427 bool loadSynchronously,
430 TextureManager::TextureHash hash,
431 bool orientationCorrection,
432 bool preMultiplyOnLoad )
434 desiredSize( desiredSize ),
435 useSize( desiredSize ),
436 atlasRect( 0.0f, 0.0f, 1.0f, 1.0f ), // Full atlas rectangle
437 textureId( textureId ),
438 maskTextureId( maskTextureId ),
440 scaleFactor( scaleFactor ),
441 referenceCount( 1u ),
442 loadState( NOT_STARTED ),
443 fittingMode( fittingMode ),
444 samplingMode( samplingMode ),
445 storageType( UPLOAD_TO_TEXTURE ),
446 loadSynchronously( loadSynchronously ),
447 useAtlas( useAtlas ),
448 cropToMask( cropToMask ),
449 orientationCorrection( true ),
450 preMultiplyOnLoad( preMultiplyOnLoad ),
451 preMultiplied( false )
456 * Container type used to store all observer clients of this Texture
458 typedef Dali::Vector< TextureUploadObserver* > ObserverListType;
460 ObserverListType observerList; ///< Container used to store all observer clients of this Texture
461 Toolkit::ImageAtlas atlas; ///< The atlas this Texture lays within (if any)
462 Devel::PixelBuffer pixelBuffer;///< The PixelBuffer holding the image data (May be empty after upload)
463 TextureSet textureSet; ///< The TextureSet holding the Texture
464 VisualUrl url; ///< The URL of the image
465 ImageDimensions desiredSize; ///< The size requested
466 ImageDimensions useSize; ///< The size used
467 Vector4 atlasRect; ///< The atlas rect used if atlased
468 TextureId textureId; ///< The TextureId associated with this Texture
469 TextureId maskTextureId; ///< The mask TextureId to be applied on load
470 TextureManager::TextureHash hash; ///< The hash used to cache this Texture
471 float scaleFactor; ///< The scale factor to apply to the Texture when masking
472 int16_t referenceCount; ///< The reference count of clients using this Texture
473 LoadState loadState:3; ///< The load state showing the load progress of the Texture
474 FittingMode::Type fittingMode:2; ///< The requested FittingMode
475 Dali::SamplingMode::Type samplingMode:3; ///< The requested SamplingMode
476 StorageType storageType:1; ///< CPU storage / GPU upload;
477 bool loadSynchronously:1; ///< True if synchronous loading was requested
478 UseAtlas useAtlas:1; ///< USE_ATLAS if an atlas was requested.
479 ///< This is updated to false if atlas is not used
480 bool cropToMask:1; ///< true if the image should be cropped to the mask size.
481 bool orientationCorrection:1; ///< true if the image should be rotated to match exif orientation data
482 bool preMultiplyOnLoad:1; ///< true if the image's color should be multiplied by it's alpha
483 bool preMultiplied:1; ///< true if the image's color was multiplied by it's alpha
489 * Struct to hold information about a requested Async load.
490 * This is used to look up a TextureManager::TextureId from the returned AsyncLoad Id.
492 struct AsyncLoadingInfo
494 AsyncLoadingInfo( TextureId textureId )
495 : textureId( textureId ),
500 TextureId textureId; ///< The external Texture Id assigned to this load
501 uint32_t loadId; ///< The load Id used by the async loader to reference this load
506 typedef std::deque<AsyncLoadingInfo> AsyncLoadingInfoContainerType; ///< The container type used to manage Asynchronous loads in progress
507 typedef std::vector<TextureInfo> TextureInfoContainerType; ///< The container type used to manage the life-cycle and caching of Textures
510 * @brief Used internally to initiate a load.
511 * @param[in] textureInfo The TextureInfo struct associated with the Texture
512 * @return True if the load was initiated
514 bool LoadTexture( TextureInfo& textureInfo );
517 * Add the observer to the observer list
518 * @param[in] textureInfo The TextureInfo struct associated with the texture
519 * observer The observer wishing to observe the texture upload
521 void ObserveTexture( TextureInfo & textureInfo, TextureUploadObserver* observer );
524 * @brief This signal handler is called when the async local loader finishes loading.
525 * @param[in] id This is the async image loaders Id
526 * @param[in] pixelBuffer The loaded image data
528 void AsyncLocalLoadComplete( uint32_t id, Devel::PixelBuffer pixelBuffer );
531 * @brief This signal handler is called when the async local loader finishes loading.
532 * @param[in] id This is the async image loaders Id
533 * @param[in] pixelBuffer The loaded image data
535 void AsyncRemoteLoadComplete( uint32_t id, Devel::PixelBuffer pixelBuffer );
538 * Common method to handle loading completion
539 * @param[in] container The Async loading container
540 * @param[in] id This is the async image loaders Id
541 * @param[in] pixelBuffer The loaded image data
543 void AsyncLoadComplete( AsyncLoadingInfoContainerType& container, uint32_t id, Devel::PixelBuffer pixelBuffer );
546 * @brief Performs Post-Load steps including atlasing.
547 * @param[in] textureInfo The struct associated with this Texture
548 * @param[in] pixelBuffer The image pixelBuffer
549 * @return True if successful
551 void PostLoad( TextureManager::TextureInfo& textureInfo, Devel::PixelBuffer& pixelBuffer );
554 * Check if there is a texture waiting to be masked. If there
555 * is then apply this mask and upload it.
556 * @param[in] maskTextureInfo The texture info of the mask that has just loaded.
558 void CheckForWaitingTexture( TextureInfo& maskTextureInfo );
561 * Apply the mask to the pixelBuffer.
562 * @param[in] pixelBuffer The pixelBuffer to apply the mask to
563 * @param[in] maskTextureId The texture id of the mask.
564 * @param[in] contentScale The factor to scale the content
565 * @param[in] cropToMask Whether to crop the content to the mask size
567 void ApplyMask( Devel::PixelBuffer& pixelBuffer, TextureId maskTextureId,
568 float contentScale, bool cropToMask );
571 * Upload the texture specified in pixelBuffer to the appropriate location
572 * @param[in] pixelBuffer The image data to upload
573 * @param[in] textureInfo The texture info containing the location to
576 void UploadTexture( Devel::PixelBuffer& pixelBuffer, TextureInfo& textureInfo );
579 * Mark the texture as complete, and inform observers
580 * @param[in] textureInfo The struct associated with this Texture
582 void UploadComplete( TextureInfo& textureInfo );
585 * Notify the current observers that the texture upload is complete,
586 * then remove the observers from the list.
587 * @param[in] textureInfo The struct associated with this Texture
588 * @param[in] success If the pixel data was retrieved successfully and uploaded to GPU
590 void NotifyObservers( TextureInfo& textureInfo, bool success );
593 * @brief Generates a new, unique TextureId
594 * @return A unique TextureId
596 TextureManager::TextureId GenerateUniqueTextureId();
599 * @brief Used to lookup an index into the TextureInfoContainer from a TextureId
600 * @param[in] textureId The TextureId to look up
601 * @return The cache index
603 int GetCacheIndexFromId( TextureId textureId );
607 * @brief Generates a hash for caching based on the input parameters.
608 * Only applies size, fitting mode andsampling mode if the size is specified.
609 * Only applies maskTextureId if it isn't INVALID_TEXTURE_ID
610 * Always applies useAtlas.
611 * @param[in] url The URL of the image to load
612 * @param[in] size The image size
613 * @param[in] fittingMode The FittingMode to use
614 * @param[in] samplingMode The SamplingMode to use
615 * @param[in] useAtlas True if atlased
616 * @param[in] maskTextureId The masking texture id (or INVALID_TEXTURE_ID)
617 * @return A hash of the provided data for caching.
619 TextureHash GenerateHash( const std::string& url, const ImageDimensions size,
620 const FittingMode::Type fittingMode,
621 const Dali::SamplingMode::Type samplingMode, const UseAtlas useAtlas,
622 TextureId maskTextureId,
623 MultiplyOnLoad preMultiplyOnLoad);
625 * @brief Looks up a cached texture by its hash.
626 * If found, the given parameters are used to check there is no hash-collision.
627 * @param[in] hash The hash to look up
628 * @param[in] url The URL of the image to load
629 * @param[in] size The image size
630 * @param[in] fittingMode The FittingMode to use
631 * @param[in] samplingMode The SamplingMode to use
632 * @param[in] useAtlas True if atlased
633 * @param[in] maskTextureId Optional texture ID to use to mask this image
634 * @return A TextureId of a cached Texture if found. Or INVALID_TEXTURE_ID if not found.
636 TextureManager::TextureId FindCachedTexture(
637 const TextureManager::TextureHash hash,
638 const std::string& url,
639 const ImageDimensions size,
640 const FittingMode::Type fittingMode,
641 const Dali::SamplingMode::Type samplingMode,
643 TextureId maskTextureId,
644 MultiplyOnLoad preMultiplyOnLoad);
649 * @brief Helper class to keep the relation between AsyncImageLoader and corresponding LoadingInfo container
651 class AsyncLoadingHelper : public ConnectionTracker
655 * @brief Create an AsyncLoadingHelper.
656 * @param[in] textureManager Reference to the texture manager
658 AsyncLoadingHelper(TextureManager& textureManager);
661 * @brief Load a new texture.
662 * @param[in] textureId TextureId to reference the texture that will be loaded
663 * @param[in] url The URL of the image to load
664 * @param[in] desiredSize The size the image is likely to appear at.
665 * This can be set to 0,0 for automatic
666 * @param[in] fittingMode The FittingMode to use
667 * @param[in] samplingMode The SamplingMode to use
668 * @param[in] orientationCorrection Whether to use image metadata to rotate or flip the image,
669 * e.g., from portrait to landscape
671 void Load(TextureId textureId,
672 const VisualUrl& url,
673 ImageDimensions desiredSize,
674 FittingMode::Type fittingMode,
675 SamplingMode::Type samplingMode,
676 bool orientationCorrection);
679 AsyncLoadingHelper(const AsyncLoadingHelper&) = delete;
680 AsyncLoadingHelper& operator=(const AsyncLoadingHelper&) = delete;
682 AsyncLoadingHelper(AsyncLoadingHelper&& rhs);
683 AsyncLoadingHelper& operator=(AsyncLoadingHelper&&rhs) = delete;
687 * @brief Main constructor that used by all other constructors
689 AsyncLoadingHelper(Toolkit::AsyncImageLoader loader,
690 TextureManager& textureManager,
691 AsyncLoadingInfoContainerType&& loadingInfoContainer);
694 * @brief Callback to be called when texture loading is complete, it passes the pixel buffer on to texture manager.
695 * @param[in] id Loader id
696 * @param[in] pixelBuffer Image data
698 void AsyncLoadComplete(uint32_t id, Devel::PixelBuffer pixelBuffer);
701 Toolkit::AsyncImageLoader mLoader;
702 TextureManager& mTextureManager;
703 AsyncLoadingInfoContainerType mLoadingInfoContainer;
706 struct ExternalTextureInfo
709 TextureSet textureSet;
715 * Deleted copy constructor.
717 TextureManager( const TextureManager& ) = delete;
720 * Deleted assignment operator.
722 TextureManager& operator=( const TextureManager& rhs ) = delete;
725 * This is called by the TextureManagerUploadObserver when an observer is destroyed.
726 * We use the callback to know when to remove an observer from our notify list.
727 * @param[in] observer The observer that generated the callback
729 void ObserverDestroyed( TextureUploadObserver* observer );
731 private: // Member Variables:
733 TextureInfoContainerType mTextureInfoContainer; ///< Used to manage the life-cycle and caching of Textures
734 RoundRobinContainerView< AsyncLoadingHelper > mAsyncLocalLoaders; ///< The Asynchronous image loaders used to provide all local async loads
735 RoundRobinContainerView< AsyncLoadingHelper > mAsyncRemoteLoaders; ///< The Asynchronous image loaders used to provide all remote async loads
736 std::vector< ExternalTextureInfo > mExternalTextures; ///< Externally provided textures
737 Dali::Vector<LifecycleObserver*> mLifecycleObservers; ///< Lifecycle observers of texture manager
738 TextureId mCurrentTextureId; ///< The current value used for the unique Texture Id generation
744 } // namespace Toolkit
748 #endif // DALI_TOOLKIT_TEXTURE_MANAGER_IMPL_H