dali-toolkit/internal/texture-manager/texture-manager-impl.cpp

   1 /*
   2  * Copyright (c) 2022 Samsung Electronics Co., Ltd.
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the "License");
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at
   7  *
   8  * http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  *
  16  */
  17
  18 // CLASS HEADER
  19 #include "texture-manager-impl.h"
  20
  21 // EXTERNAL HEADERS
  22 #include <dali/devel-api/adaptor-framework/environment-variable.h>
  23 #include <dali/devel-api/adaptor-framework/image-loading.h>
  24 #include <dali/devel-api/adaptor-framework/pixel-buffer.h>
  25 #include <dali/integration-api/debug.h>
  26 #include <dali/public-api/rendering/geometry.h>
  27
  28 // INTERNAL HEADERS
  29 #include <dali-toolkit/internal/texture-manager/texture-async-loading-helper.h>
  30 #include <dali-toolkit/internal/texture-manager/texture-cache-manager.h>
  31 #include <dali-toolkit/internal/visuals/image-atlas-manager.h>
  32 #include <dali-toolkit/internal/visuals/rendering-addon.h>
  33
  34 namespace
  35 {
  36 constexpr auto INITIAL_HASH_NUMBER                     = size_t{0u};
  37 constexpr auto DEFAULT_NUMBER_OF_LOCAL_LOADER_THREADS  = size_t{4u};
  38 constexpr auto DEFAULT_NUMBER_OF_REMOTE_LOADER_THREADS = size_t{8u};
  39
  40 constexpr auto NUMBER_OF_LOCAL_LOADER_THREADS_ENV  = "DALI_TEXTURE_LOCAL_THREADS";
  41 constexpr auto NUMBER_OF_REMOTE_LOADER_THREADS_ENV = "DALI_TEXTURE_REMOTE_THREADS";
  42
  43 size_t GetNumberOfThreads(const char* environmentVariable, size_t defaultValue)
  44 {
  45   using Dali::EnvironmentVariable::GetEnvironmentVariable;
  46   auto           numberString          = GetEnvironmentVariable(environmentVariable);
  47   auto           numberOfThreads       = numberString ? std::strtoul(numberString, nullptr, 10) : 0;
  48   constexpr auto MAX_NUMBER_OF_THREADS = 100u;
  49   DALI_ASSERT_DEBUG(numberOfThreads < MAX_NUMBER_OF_THREADS);
  50   return (numberOfThreads > 0 && numberOfThreads < MAX_NUMBER_OF_THREADS) ? numberOfThreads : defaultValue;
  51 }
  52
  53 size_t GetNumberOfLocalLoaderThreads()
  54 {
  55   return GetNumberOfThreads(NUMBER_OF_LOCAL_LOADER_THREADS_ENV, DEFAULT_NUMBER_OF_LOCAL_LOADER_THREADS);
  56 }
  57
  58 size_t GetNumberOfRemoteLoaderThreads()
  59 {
  60   return GetNumberOfThreads(NUMBER_OF_REMOTE_LOADER_THREADS_ENV, DEFAULT_NUMBER_OF_REMOTE_LOADER_THREADS);
  61 }
  62
  63 } // namespace
  64
  65 namespace Dali
  66 {
  67 namespace Toolkit
  68 {
  69 namespace Internal
  70 {
  71 #ifdef DEBUG_ENABLED
  72 // Define logfilter Internal namespace level so other files (e.g. texture-cache-manager.cpp) can also use this filter.
  73 Debug::Filter* gTextureManagerLogFilter = Debug::Filter::New(Debug::NoLogging, false, "LOG_TEXTURE_MANAGER");
  74
  75 // clang-format off
  76 #define GET_LOAD_STATE_STRING(loadState) \
  77   loadState == TextureManagerType::LoadState::NOT_STARTED      ? "NOT_STARTED"      : \
  78   loadState == TextureManagerType::LoadState::LOADING          ? "LOADING"          : \
  79   loadState == TextureManagerType::LoadState::LOAD_FINISHED    ? "LOAD_FINISHED"    : \
  80   loadState == TextureManagerType::LoadState::WAITING_FOR_MASK ? "WAITING_FOR_MASK" : \
  81   loadState == TextureManagerType::LoadState::MASK_APPLYING    ? "MASK_APPLYING"    : \
  82   loadState == TextureManagerType::LoadState::MASK_APPLIED     ? "MASK_APPLIED"     : \
  83   loadState == TextureManagerType::LoadState::UPLOADED         ? "UPLOADED"         : \
  84   loadState == TextureManagerType::LoadState::CANCELLED        ? "CANCELLED"        : \
  85   loadState == TextureManagerType::LoadState::LOAD_FAILED      ? "LOAD_FAILED"      : \
  86                                                                  "Unknown"
  87 // clang-format on
  88 #endif
  89
  90 namespace
  91 {
  92 const uint32_t DEFAULT_ATLAS_SIZE(1024u);               ///< This size can fit 8 by 8 images of average size 128 * 128
  93 const Vector4  FULL_ATLAS_RECT(0.0f, 0.0f, 1.0f, 1.0f); ///< UV Rectangle that covers the full Texture
  94
  95 void PreMultiply(Devel::PixelBuffer pixelBuffer, TextureManager::MultiplyOnLoad& preMultiplyOnLoad)
  96 {
  97   if(Pixel::HasAlpha(pixelBuffer.GetPixelFormat()))
  98   {
  99     if(preMultiplyOnLoad == TextureManager::MultiplyOnLoad::MULTIPLY_ON_LOAD)
 100     {
 101       pixelBuffer.MultiplyColorByAlpha();
 102     }
 103   }
 104   else
 105   {
 106     preMultiplyOnLoad = TextureManager::MultiplyOnLoad::LOAD_WITHOUT_MULTIPLY;
 107   }
 108 }
 109
 110 } // Anonymous namespace
 111
 112 TextureManager::MaskingData::MaskingData()
 113 : mAlphaMaskUrl(),
 114   mAlphaMaskId(INVALID_TEXTURE_ID),
 115   mContentScaleFactor(1.0f),
 116   mCropToMask(true)
 117 {
 118 }
 119
 120 TextureManager::TextureManager()
 121 : mTextureCacheManager(),
 122   mAsyncLocalLoaders(GetNumberOfLocalLoaderThreads(), [&]() { return TextureAsyncLoadingHelper(*this); }),
 123   mAsyncRemoteLoaders(GetNumberOfRemoteLoaderThreads(), [&]() { return TextureAsyncLoadingHelper(*this); }),
 124   mLifecycleObservers(),
 125   mLoadQueue(),
 126   mRemoveQueue(),
 127   mQueueLoadFlag(false)
 128 {
 129   // Initialize the AddOn
 130   RenderingAddOn::Get();
 131 }
 132
 133 TextureManager::~TextureManager()
 134 {
 135   for(auto iter = mLifecycleObservers.Begin(), endIter = mLifecycleObservers.End(); iter != endIter; ++iter)
 136   {
 137     (*iter)->TextureManagerDestroyed();
 138   }
 139 }
 140
 141 TextureSet TextureManager::LoadAnimatedImageTexture(
 142   const VisualUrl&                url,
 143   Dali::AnimatedImageLoading      animatedImageLoading,
 144   const uint32_t&                 frameIndex,
 145   TextureManager::TextureId&      textureId,
 146   MaskingDataPointer&             maskInfo,
 147   const Dali::SamplingMode::Type& samplingMode,
 148   const Dali::WrapMode::Type&     wrapModeU,
 149   const Dali::WrapMode::Type&     wrapModeV,
 150   const bool&                     synchronousLoading,
 151   TextureUploadObserver*          textureObserver,
 152   TextureManager::MultiplyOnLoad& preMultiplyOnLoad)
 153 {
 154   TextureSet textureSet;
 155
 156   if(synchronousLoading)
 157   {
 158     Devel::PixelBuffer pixelBuffer;
 159     if(animatedImageLoading)
 160     {
 161       pixelBuffer = animatedImageLoading.LoadFrame(frameIndex);
 162     }
 163     if(!pixelBuffer)
 164     {
 165       DALI_LOG_ERROR("TextureManager::LoadAnimatedImageTexture: Synchronous loading is failed\n");
 166     }
 167     else
 168     {
 169       if(maskInfo && maskInfo->mAlphaMaskUrl.IsValid())
 170       {
 171         Devel::PixelBuffer maskPixelBuffer = LoadImageFromFile(maskInfo->mAlphaMaskUrl.GetUrl(), ImageDimensions(), FittingMode::SCALE_TO_FILL, SamplingMode::NO_FILTER, true);
 172         if(maskPixelBuffer)
 173         {
 174           pixelBuffer.ApplyMask(maskPixelBuffer, maskInfo->mContentScaleFactor, maskInfo->mCropToMask);
 175         }
 176         else
 177         {
 178           DALI_LOG_ERROR("TextureManager::LoadAnimatedImageTexture: Synchronous mask image loading is failed\n");
 179         }
 180       }
 181
 182       if(preMultiplyOnLoad == TextureManager::MultiplyOnLoad::MULTIPLY_ON_LOAD)
 183       {
 184         PreMultiply(pixelBuffer, preMultiplyOnLoad);
 185       }
 186
 187       PixelData pixelData = Devel::PixelBuffer::Convert(pixelBuffer); // takes ownership of buffer
 188       if(!textureSet)
 189       {
 190         Texture texture = Texture::New(Dali::TextureType::TEXTURE_2D, pixelData.GetPixelFormat(), pixelData.GetWidth(), pixelData.GetHeight());
 191         texture.Upload(pixelData);
 192         textureSet = TextureSet::New();
 193         textureSet.SetTexture(0u, texture);
 194       }
 195     }
 196   }
 197   else
 198   {
 199     TextureId alphaMaskId        = INVALID_TEXTURE_ID;
 200     float     contentScaleFactor = 1.0f;
 201     bool      cropToMask         = false;
 202     if(maskInfo && maskInfo->mAlphaMaskUrl.IsValid())
 203     {
 204       maskInfo->mAlphaMaskId = RequestMaskLoad(maskInfo->mAlphaMaskUrl);
 205       alphaMaskId            = maskInfo->mAlphaMaskId;
 206       contentScaleFactor     = maskInfo->mContentScaleFactor;
 207       cropToMask             = maskInfo->mCropToMask;
 208     }
 209
 210     textureId        = RequestLoadInternal(url, alphaMaskId, contentScaleFactor, ImageDimensions(), FittingMode::SCALE_TO_FILL, SamplingMode::BOX_THEN_LINEAR, UseAtlas::NO_ATLAS, cropToMask, StorageType::UPLOAD_TO_TEXTURE, textureObserver, true, TextureManager::ReloadPolicy::CACHED, preMultiplyOnLoad, animatedImageLoading, frameIndex, false);
 211
 212     TextureManager::LoadState loadState = mTextureCacheManager.GetTextureStateInternal(textureId);
 213     if(loadState == TextureManager::LoadState::UPLOADED)
 214     {
 215       // LoadComplete has already been called - keep the same texture set
 216       textureSet = GetTextureSet(textureId);
 217     }
 218   }
 219
 220   if(textureSet)
 221   {
 222     Sampler sampler = Sampler::New();
 223     sampler.SetWrapMode(wrapModeU, wrapModeV);
 224     textureSet.SetSampler(0u, sampler);
 225   }
 226
 227   return textureSet;
 228 }
 229
 230 Devel::PixelBuffer TextureManager::LoadPixelBuffer(
 231   const VisualUrl&                url,
 232   const Dali::ImageDimensions&    desiredSize,
 233   const Dali::FittingMode::Type&  fittingMode,
 234   const Dali::SamplingMode::Type& samplingMode,
 235   const bool&                     synchronousLoading,
 236   TextureUploadObserver*          textureObserver,
 237   const bool&                     orientationCorrection,
 238   TextureManager::MultiplyOnLoad& preMultiplyOnLoad)
 239 {
 240   Devel::PixelBuffer pixelBuffer;
 241   if(synchronousLoading)
 242   {
 243     if(url.IsValid())
 244     {
 245       if(url.IsBufferResource())
 246       {
 247         const EncodedImageBuffer& encodedImageBuffer = mTextureCacheManager.GetEncodedImageBuffer(url);
 248         if(encodedImageBuffer)
 249         {
 250           pixelBuffer = LoadImageFromBuffer(encodedImageBuffer.GetRawBuffer(), desiredSize, fittingMode, samplingMode, orientationCorrection);
 251         }
 252       }
 253       else
 254       {
 255         pixelBuffer = LoadImageFromFile(url.GetUrl(), desiredSize, fittingMode, samplingMode, orientationCorrection);
 256       }
 257       if(pixelBuffer && preMultiplyOnLoad == TextureManager::MultiplyOnLoad::MULTIPLY_ON_LOAD)
 258       {
 259         PreMultiply(pixelBuffer, preMultiplyOnLoad);
 260       }
 261     }
 262   }
 263   else
 264   {
 265     RequestLoadInternal(url, INVALID_TEXTURE_ID, 1.0f, desiredSize, fittingMode, samplingMode, UseAtlas::NO_ATLAS, false, StorageType::RETURN_PIXEL_BUFFER, textureObserver, orientationCorrection, TextureManager::ReloadPolicy::FORCED, preMultiplyOnLoad, Dali::AnimatedImageLoading(), 0u, false);
 266   }
 267
 268   return pixelBuffer;
 269 }
 270
 271 TextureSet TextureManager::LoadTexture(
 272   const VisualUrl&                    url,
 273   const Dali::ImageDimensions&        desiredSize,
 274   const Dali::FittingMode::Type&      fittingMode,
 275   const Dali::SamplingMode::Type&     samplingMode,
 276   MaskingDataPointer&                 maskInfo,
 277   const bool&                         synchronousLoading,
 278   TextureManager::TextureId&          textureId,
 279   Vector4&                            textureRect,
 280   Dali::ImageDimensions&              textureRectSize,
 281   bool&                               atlasingStatus,
 282   bool&                               loadingStatus,
 283   const Dali::WrapMode::Type&         wrapModeU,
 284   const Dali::WrapMode::Type&         wrapModeV,
 285   TextureUploadObserver*              textureObserver,
 286   AtlasUploadObserver*                atlasObserver,
 287   ImageAtlasManagerPtr                imageAtlasManager,
 288   const bool&                         orientationCorrection,
 289   const TextureManager::ReloadPolicy& reloadPolicy,
 290   TextureManager::MultiplyOnLoad&     preMultiplyOnLoad)
 291 {
 292   TextureSet textureSet;
 293
 294   loadingStatus = false;
 295   textureRect   = FULL_ATLAS_RECT;
 296
 297   if(VisualUrl::TEXTURE == url.GetProtocolType())
 298   {
 299     std::string location = url.GetLocation();
 300     if(location.size() > 0u)
 301     {
 302       TextureId id = std::stoi(location);
 303       textureSet   = mTextureCacheManager.GetExternalTextureSet(id);
 304       if(textureSet)
 305       {
 306         preMultiplyOnLoad = TextureManager::MultiplyOnLoad::LOAD_WITHOUT_MULTIPLY;
 307         textureId         = id;
 308         return textureSet;
 309       }
 310     }
 311   }
 312   else
 313   {
 314     // For Atlas
 315     if(synchronousLoading && atlasingStatus)
 316     {
 317       const bool synchronousAtlasAvaliable = (desiredSize != ImageDimensions() || url.IsLocalResource()) ? imageAtlasManager->CheckAtlasAvailable(url, desiredSize)
 318                                                                                                          : false;
 319       if(synchronousAtlasAvaliable)
 320       {
 321         Devel::PixelBuffer pixelBuffer = LoadImageSynchronously(url, desiredSize, fittingMode, samplingMode, orientationCorrection);
 322
 323         if(pixelBuffer && maskInfo && maskInfo->mAlphaMaskUrl.IsValid())
 324         {
 325           Devel::PixelBuffer maskPixelBuffer = LoadImageSynchronously(maskInfo->mAlphaMaskUrl, ImageDimensions(), FittingMode::SCALE_TO_FILL, SamplingMode::NO_FILTER, true);
 326           if(maskPixelBuffer)
 327           {
 328             pixelBuffer.ApplyMask(maskPixelBuffer, maskInfo->mContentScaleFactor, maskInfo->mCropToMask);
 329           }
 330         }
 331
 332         PixelData data;
 333         if(pixelBuffer)
 334         {
 335           PreMultiply(pixelBuffer, preMultiplyOnLoad);
 336           data = Devel::PixelBuffer::Convert(pixelBuffer); // takes ownership of buffer
 337
 338           if(data)
 339           {
 340             textureSet = imageAtlasManager->Add(textureRect, data);
 341             if(textureSet)
 342             {
 343               textureRectSize.SetWidth(data.GetWidth());
 344               textureRectSize.SetHeight(data.GetHeight());
 345             }
 346           }
 347           else
 348           {
 349             DALI_LOG_ERROR("TextureManager::LoadTexture: Synchronous Texture loading with atlasing is failed.\n");
 350           }
 351         }
 352         if(!textureSet)
 353         {
 354           atlasingStatus = false;
 355         }
 356       }
 357     }
 358
 359     if(!textureSet)
 360     {
 361       loadingStatus = true;
 362       // Atlas manager can chage desired size when it is set by 0,0.
 363       // We should store into textureRectSize only if atlasing successed.
 364       // So copy inputed desiredSize, and replace value into textureRectSize only if atlasing success.
 365       Dali::ImageDimensions atlasDesiredSize = desiredSize;
 366       if(atlasingStatus)
 367       {
 368         if(url.IsBufferResource())
 369         {
 370           const EncodedImageBuffer& encodedImageBuffer = GetEncodedImageBuffer(url.GetUrl());
 371           if(encodedImageBuffer)
 372           {
 373             textureSet = imageAtlasManager->Add(textureRect, encodedImageBuffer, desiredSize, fittingMode, true, atlasObserver);
 374           }
 375         }
 376         else
 377         {
 378           textureSet = imageAtlasManager->Add(textureRect, url, atlasDesiredSize, fittingMode, true, atlasObserver);
 379         }
 380       }
 381       if(!textureSet) // big image, no atlasing or atlasing failed
 382       {
 383         atlasingStatus = false;
 384         if(!maskInfo || !maskInfo->mAlphaMaskUrl.IsValid())
 385         {
 386           textureId = RequestLoad(
 387             url,
 388             desiredSize,
 389             fittingMode,
 390             samplingMode,
 391             UseAtlas::NO_ATLAS,
 392             textureObserver,
 393             orientationCorrection,
 394             reloadPolicy,
 395             preMultiplyOnLoad,
 396             synchronousLoading);
 397         }
 398         else
 399         {
 400           maskInfo->mAlphaMaskId = RequestMaskLoad(maskInfo->mAlphaMaskUrl, synchronousLoading);
 401           textureId              = RequestLoad(
 402             url,
 403             maskInfo->mAlphaMaskId,
 404             maskInfo->mContentScaleFactor,
 405             desiredSize,
 406             fittingMode,
 407             samplingMode,
 408             UseAtlas::NO_ATLAS,
 409             maskInfo->mCropToMask,
 410             textureObserver,
 411             orientationCorrection,
 412             reloadPolicy,
 413             preMultiplyOnLoad,
 414             synchronousLoading);
 415         }
 416
 417         TextureManager::LoadState loadState = mTextureCacheManager.GetTextureStateInternal(textureId);
 418         if(loadState == TextureManager::LoadState::UPLOADED)
 419         {
 420           // LoadComplete has already been called - keep the same texture set
 421           textureSet = mTextureCacheManager.GetTextureSet(textureId);
 422         }
 423
 424         // If we are loading the texture, or waiting for the ready signal handler to complete, inform
 425         // caller that they need to wait.
 426         loadingStatus = (loadState == TextureManager::LoadState::LOADING ||
 427                          loadState == TextureManager::LoadState::WAITING_FOR_MASK ||
 428                          loadState == TextureManager::LoadState::MASK_APPLYING ||
 429                          loadState == TextureManager::LoadState::MASK_APPLIED ||
 430                          loadState == TextureManager::LoadState::NOT_STARTED ||
 431                          mQueueLoadFlag);
 432       }
 433       else
 434       {
 435         textureRectSize = atlasDesiredSize;
 436       }
 437     }
 438   }
 439
 440   if(!atlasingStatus && textureSet)
 441   {
 442     Sampler sampler = Sampler::New();
 443     sampler.SetWrapMode(wrapModeU, wrapModeV);
 444     textureSet.SetSampler(0u, sampler);
 445   }
 446
 447   if(synchronousLoading)
 448   {
 449     loadingStatus = false;
 450   }
 451
 452   return textureSet;
 453 }
 454
 455 TextureManager::TextureId TextureManager::RequestLoad(
 456   const VisualUrl&                    url,
 457   const ImageDimensions&              desiredSize,
 458   const Dali::FittingMode::Type&      fittingMode,
 459   const Dali::SamplingMode::Type&     samplingMode,
 460   const UseAtlas&                     useAtlas,
 461   TextureUploadObserver*              observer,
 462   const bool&                         orientationCorrection,
 463   const TextureManager::ReloadPolicy& reloadPolicy,
 464   TextureManager::MultiplyOnLoad&     preMultiplyOnLoad,
 465   const bool&                         synchronousLoading)
 466 {
 467   return RequestLoadInternal(url, INVALID_TEXTURE_ID, 1.0f, desiredSize, fittingMode, samplingMode, useAtlas, false, StorageType::UPLOAD_TO_TEXTURE, observer, orientationCorrection, reloadPolicy, preMultiplyOnLoad, Dali::AnimatedImageLoading(), 0u, synchronousLoading);
 468 }
 469
 470 TextureManager::TextureId TextureManager::RequestLoad(
 471   const VisualUrl&                    url,
 472   const TextureManager::TextureId&    maskTextureId,
 473   const float&                        contentScale,
 474   const Dali::ImageDimensions&        desiredSize,
 475   const Dali::FittingMode::Type&      fittingMode,
 476   const Dali::SamplingMode::Type&     samplingMode,
 477   const TextureManager::UseAtlas&     useAtlas,
 478   const bool&                         cropToMask,
 479   TextureUploadObserver*              observer,
 480   const bool&                         orientationCorrection,
 481   const TextureManager::ReloadPolicy& reloadPolicy,
 482   TextureManager::MultiplyOnLoad&     preMultiplyOnLoad,
 483   const bool&                         synchronousLoading)
 484 {
 485   return RequestLoadInternal(url, maskTextureId, contentScale, desiredSize, fittingMode, samplingMode, useAtlas, cropToMask, StorageType::UPLOAD_TO_TEXTURE, observer, orientationCorrection, reloadPolicy, preMultiplyOnLoad, Dali::AnimatedImageLoading(), 0u, synchronousLoading);
 486 }
 487
 488 TextureManager::TextureId TextureManager::RequestMaskLoad(
 489   const VisualUrl& maskUrl,
 490   const bool&      synchronousLoading)
 491 {
 492   // Use the normal load procedure to get the alpha mask.
 493   auto preMultiply = TextureManager::MultiplyOnLoad::LOAD_WITHOUT_MULTIPLY;
 494   return RequestLoadInternal(maskUrl, INVALID_TEXTURE_ID, 1.0f, ImageDimensions(), FittingMode::SCALE_TO_FILL, SamplingMode::NO_FILTER, UseAtlas::NO_ATLAS, false, StorageType::KEEP_PIXEL_BUFFER, NULL, true, TextureManager::ReloadPolicy::CACHED, preMultiply, Dali::AnimatedImageLoading(), 0u, synchronousLoading);
 495 }
 496
 497 TextureManager::TextureId TextureManager::RequestLoadInternal(
 498   const VisualUrl&                    url,
 499   const TextureManager::TextureId&    maskTextureId,
 500   const float&                        contentScale,
 501   const Dali::ImageDimensions&        desiredSize,
 502   const Dali::FittingMode::Type&      fittingMode,
 503   const Dali::SamplingMode::Type&     samplingMode,
 504   const TextureManager::UseAtlas&     useAtlas,
 505   const bool&                         cropToMask,
 506   const TextureManager::StorageType&  storageType,
 507   TextureUploadObserver*              observer,
 508   const bool&                         orientationCorrection,
 509   const TextureManager::ReloadPolicy& reloadPolicy,
 510   TextureManager::MultiplyOnLoad&     preMultiplyOnLoad,
 511   Dali::AnimatedImageLoading          animatedImageLoading,
 512   const std::uint32_t&                frameIndex,
 513   const bool&                         synchronousLoading)
 514 {
 515   TextureHash       textureHash = INITIAL_HASH_NUMBER;
 516   TextureCacheIndex cacheIndex  = INVALID_CACHE_INDEX;
 517   if(storageType != StorageType::RETURN_PIXEL_BUFFER && frameIndex == 0)
 518   {
 519     textureHash = mTextureCacheManager.GenerateHash(url, desiredSize, fittingMode, samplingMode, useAtlas, maskTextureId, cropToMask, frameIndex);
 520
 521     // Look up the texture by hash. Note: The extra parameters are used in case of a hash collision.
 522     cacheIndex = mTextureCacheManager.FindCachedTexture(textureHash, url, desiredSize, fittingMode, samplingMode, useAtlas, maskTextureId, cropToMask, preMultiplyOnLoad, (animatedImageLoading) ? true : false, frameIndex);
 523   }
 524
 525   TextureManager::TextureId textureId = INVALID_TEXTURE_ID;
 526   // Check if the requested Texture exists in the cache.
 527   if(cacheIndex != INVALID_CACHE_INDEX)
 528   {
 529     if(TextureManager::ReloadPolicy::CACHED == reloadPolicy)
 530     {
 531       // Mark this texture being used by another client resource. Forced reload would replace the current texture
 532       // without the need for incrementing the reference count.
 533       ++(mTextureCacheManager[cacheIndex].referenceCount);
 534     }
 535     textureId = mTextureCacheManager[cacheIndex].textureId;
 536
 537     // Update preMultiplyOnLoad value. It should be changed according to preMultiplied value of the cached info.
 538     preMultiplyOnLoad = mTextureCacheManager[cacheIndex].preMultiplied ? TextureManager::MultiplyOnLoad::MULTIPLY_ON_LOAD : TextureManager::MultiplyOnLoad::LOAD_WITHOUT_MULTIPLY;
 539
 540     DALI_LOG_INFO(gTextureManagerLogFilter, Debug::General, "TextureManager::RequestLoad( url=%s observer=%p ) Using cached texture id@%d, textureId=%d, frameindex=%d, premultiplied=%d\n", url.GetUrl().c_str(), observer, cacheIndex.GetIndex(), textureId, frameIndex, mTextureCacheManager[cacheIndex].preMultiplied ? 1 : 0);
 541   }
 542
 543   if(textureId == INVALID_TEXTURE_ID) // There was no caching, or caching not required
 544   {
 545     textureId = mTextureCacheManager.GenerateTextureId();
 546
 547     bool preMultiply = (preMultiplyOnLoad == TextureManager::MultiplyOnLoad::MULTIPLY_ON_LOAD);
 548
 549     // Cache new texutre, and get cacheIndex.
 550     cacheIndex = mTextureCacheManager.AppendCache(TextureInfo(textureId, maskTextureId, url, desiredSize, contentScale, fittingMode, samplingMode, false, cropToMask, useAtlas, textureHash, orientationCorrection, preMultiply, animatedImageLoading, frameIndex));
 551
 552     DALI_LOG_INFO(gTextureManagerLogFilter, Debug::General, "TextureManager::RequestLoad( url=%s observer=%p ) New texture, cacheIndex:%d, textureId=%d, frameindex=%d\n", url.GetUrl().c_str(), observer, cacheIndex.GetIndex(), textureId, frameIndex);
 553   }
 554
 555   // The below code path is common whether we are using the cache or not.
 556   // The textureInfoIndex now refers to either a pre-existing cached TextureInfo,
 557   // or a new TextureInfo just created.
 558   TextureInfo& textureInfo(mTextureCacheManager[cacheIndex]);
 559   textureInfo.maskTextureId         = maskTextureId;
 560   textureInfo.storageType           = storageType;
 561   textureInfo.orientationCorrection = orientationCorrection;
 562
 563   DALI_LOG_INFO(gTextureManagerLogFilter, Debug::General, "TextureInfo loadState:%s\n", GET_LOAD_STATE_STRING(textureInfo.loadState));
 564
 565   // Force reloading of texture by setting loadState unless already loading or cancelled.
 566   if(TextureManager::ReloadPolicy::FORCED == reloadPolicy &&
 567      TextureManager::LoadState::LOADING != textureInfo.loadState &&
 568      TextureManager::LoadState::WAITING_FOR_MASK != textureInfo.loadState &&
 569      TextureManager::LoadState::MASK_APPLYING != textureInfo.loadState &&
 570      TextureManager::LoadState::MASK_APPLIED != textureInfo.loadState &&
 571      TextureManager::LoadState::CANCELLED != textureInfo.loadState)
 572   {
 573     DALI_LOG_INFO(gTextureManagerLogFilter, Debug::Verbose, "TextureManager::RequestLoad( url=%s observer=%p ) ForcedReload cacheIndex:%d, textureId=%d\n", url.GetUrl().c_str(), observer, cacheIndex.GetIndex(), textureId);
 574
 575     textureInfo.loadState = TextureManager::LoadState::NOT_STARTED;
 576   }
 577
 578   if(!synchronousLoading)
 579   {
 580     // Check if we should add the observer.
 581     // Only do this if we have not loaded yet and it will not have loaded by the end of this method.
 582     switch(textureInfo.loadState)
 583     {
 584       case TextureManager::LoadState::LOAD_FAILED: // Failed notifies observer which then stops observing.
 585       case TextureManager::LoadState::NOT_STARTED:
 586       {
 587         LoadOrQueueTexture(textureInfo, observer); // If called inside NotifyObservers, queues until afterwards
 588         break;
 589       }
 590       case TextureManager::LoadState::LOADING:
 591       case TextureManager::LoadState::WAITING_FOR_MASK:
 592       case TextureManager::LoadState::MASK_APPLYING:
 593       case TextureManager::LoadState::MASK_APPLIED:
 594       {
 595         ObserveTexture(textureInfo, observer);
 596         break;
 597       }
 598       case TextureManager::LoadState::UPLOADED:
 599       {
 600         if(observer)
 601         {
 602           LoadOrQueueTexture(textureInfo, observer);
 603         }
 604         break;
 605       }
 606       case TextureManager::LoadState::CANCELLED:
 607       {
 608         // A cancelled texture hasn't finished loading yet. Treat as a loading texture
 609         // (it's ref count has already been incremented, above)
 610         textureInfo.loadState = TextureManager::LoadState::LOADING;
 611         ObserveTexture(textureInfo, observer);
 612         break;
 613       }
 614       case TextureManager::LoadState::LOAD_FINISHED:
 615       {
 616         // Loading has already completed.
 617         if(observer && textureInfo.storageType == StorageType::RETURN_PIXEL_BUFFER)
 618         {
 619           LoadOrQueueTexture(textureInfo, observer);
 620         }
 621         break;
 622       }
 623     }
 624   }
 625   else
 626   {
 627     // If the image is already finished to load, use cached texture.
 628     // We don't need to consider Observer because this is synchronous loading.
 629     if(!(textureInfo.loadState == TextureManager::LoadState::UPLOADED ||
 630          textureInfo.loadState == TextureManager::LoadState::LOAD_FINISHED))
 631     {
 632       Devel::PixelBuffer pixelBuffer = LoadImageSynchronously(url, desiredSize, fittingMode, samplingMode, orientationCorrection);
 633
 634       if(!pixelBuffer)
 635       {
 636         // If pixelBuffer loading is failed in synchronously, call Remove() method.
 637         Remove(textureId, nullptr);
 638         return INVALID_TEXTURE_ID;
 639       }
 640
 641       if(storageType == StorageType::KEEP_PIXEL_BUFFER) // For the mask image loading.
 642       {
 643         textureInfo.pixelBuffer = pixelBuffer; // Store the pixel data
 644         textureInfo.loadState   = LoadState::LOAD_FINISHED;
 645       }
 646       else // For the image loading.
 647       {
 648         if(maskTextureId != INVALID_TEXTURE_ID)
 649         {
 650           TextureCacheIndex maskCacheIndex = mTextureCacheManager.GetCacheIndexFromId(maskTextureId);
 651           if(maskCacheIndex != INVALID_CACHE_INDEX)
 652           {
 653             Devel::PixelBuffer maskPixelBuffer = mTextureCacheManager[maskCacheIndex].pixelBuffer;
 654             if(maskPixelBuffer)
 655             {
 656               pixelBuffer.ApplyMask(maskPixelBuffer, contentScale, cropToMask);
 657             }
 658             else
 659             {
 660               DALI_LOG_ERROR("Mask image cached invalid pixel buffer!\n");
 661             }
 662           }
 663           else
 664           {
 665             DALI_LOG_ERROR("Mask image is not stored in cache.\n");
 666           }
 667         }
 668         PreMultiply(pixelBuffer, preMultiplyOnLoad);
 669
 670         // Upload texture
 671         UploadTexture(pixelBuffer, textureInfo);
 672       }
 673     }
 674   }
 675   return textureId;
 676 }
 677
 678 void TextureManager::Remove(const TextureManager::TextureId& textureId, TextureUploadObserver* observer)
 679 {
 680   if(textureId != INVALID_TEXTURE_ID)
 681   {
 682     if(mQueueLoadFlag)
 683     {
 684       // Remove textureId after NotifyObserver finished
 685       mRemoveQueue.PushBack(textureId);
 686     }
 687     else
 688     {
 689       // Remove textureId in CacheManager.
 690       mTextureCacheManager.RemoveCache(textureId);
 691     }
 692
 693     if(observer)
 694     {
 695       // Remove element from the LoadQueue
 696       for(auto&& element : mLoadQueue)
 697       {
 698         if(element.mObserver == observer)
 699         {
 700           // Do not erase the item. We will clear it later in ProcessLoadQueue().
 701           element.mObserver = nullptr;
 702           break;
 703         }
 704       }
 705     }
 706   }
 707 }
 708
 709 Devel::PixelBuffer TextureManager::LoadImageSynchronously(
 710   const VisualUrl&                url,
 711   const Dali::ImageDimensions&    desiredSize,
 712   const Dali::FittingMode::Type&  fittingMode,
 713   const Dali::SamplingMode::Type& samplingMode,
 714   const bool&                     orientationCorrection)
 715 {
 716   Devel::PixelBuffer pixelBuffer;
 717   if(url.IsBufferResource())
 718   {
 719     const EncodedImageBuffer& encodedImageBuffer = mTextureCacheManager.GetEncodedImageBuffer(url);
 720     if(encodedImageBuffer)
 721     {
 722       pixelBuffer = LoadImageFromBuffer(encodedImageBuffer.GetRawBuffer(), desiredSize, fittingMode, samplingMode, orientationCorrection);
 723     }
 724   }
 725   else
 726   {
 727     pixelBuffer = LoadImageFromFile(url.GetUrl(), desiredSize, fittingMode, samplingMode, orientationCorrection);
 728   }
 729   return pixelBuffer;
 730 }
 731
 732 void TextureManager::AddObserver(TextureManager::LifecycleObserver& observer)
 733 {
 734   // make sure an observer doesn't observe the same object twice
 735   // otherwise it will get multiple calls to ObjectDestroyed()
 736   DALI_ASSERT_DEBUG(mLifecycleObservers.End() == std::find(mLifecycleObservers.Begin(), mLifecycleObservers.End(), &observer));
 737   mLifecycleObservers.PushBack(&observer);
 738 }
 739
 740 void TextureManager::RemoveObserver(TextureManager::LifecycleObserver& observer)
 741 {
 742   // Find the observer...
 743   auto endIter = mLifecycleObservers.End();
 744   for(auto iter = mLifecycleObservers.Begin(); iter != endIter; ++iter)
 745   {
 746     if((*iter) == &observer)
 747     {
 748       mLifecycleObservers.Erase(iter);
 749       break;
 750     }
 751   }
 752   DALI_ASSERT_DEBUG(endIter != mLifecycleObservers.End());
 753 }
 754
 755 void TextureManager::LoadOrQueueTexture(TextureManager::TextureInfo& textureInfo, TextureUploadObserver* observer)
 756 {
 757   switch(textureInfo.loadState)
 758   {
 759     case LoadState::NOT_STARTED:
 760     case LoadState::LOAD_FAILED:
 761     {
 762       if(mQueueLoadFlag)
 763       {
 764         QueueLoadTexture(textureInfo, observer);
 765       }
 766       else
 767       {
 768         LoadTexture(textureInfo, observer);
 769       }
 770       break;
 771     }
 772     case LoadState::UPLOADED:
 773     {
 774       if(mQueueLoadFlag)
 775       {
 776         QueueLoadTexture(textureInfo, observer);
 777       }
 778       else
 779       {
 780         // The Texture has already loaded. The other observers have already been notified.
 781         // We need to send a "late" loaded notification for this observer.
 782         EmitLoadComplete(observer, textureInfo, true);
 783       }
 784       break;
 785     }
 786     case LoadState::LOADING:
 787     case LoadState::CANCELLED:
 788     case LoadState::LOAD_FINISHED:
 789     case LoadState::WAITING_FOR_MASK:
 790     case LoadState::MASK_APPLYING:
 791     case LoadState::MASK_APPLIED:
 792     {
 793       break;
 794     }
 795   }
 796 }
 797
 798 void TextureManager::QueueLoadTexture(const TextureManager::TextureInfo& textureInfo, TextureUploadObserver* observer)
 799 {
 800   const auto& textureId = textureInfo.textureId;
 801   mLoadQueue.PushBack(LoadQueueElement(textureId, observer));
 802
 803   observer->DestructionSignal().Connect(this, &TextureManager::ObserverDestroyed);
 804 }
 805
 806 void TextureManager::LoadTexture(TextureManager::TextureInfo& textureInfo, TextureUploadObserver* observer)
 807 {
 808   DALI_LOG_INFO(gTextureManagerLogFilter, Debug::Concise, "TextureManager::LoadTexture(): url:%s sync:%s\n", textureInfo.url.GetUrl().c_str(), textureInfo.loadSynchronously ? "T" : "F");
 809
 810   textureInfo.loadState = LoadState::LOADING;
 811   if(!textureInfo.loadSynchronously)
 812   {
 813     auto& loadersContainer  = (textureInfo.url.IsLocalResource() || textureInfo.url.IsBufferResource()) ? mAsyncLocalLoaders : mAsyncRemoteLoaders;
 814     auto  loadingHelperIt   = loadersContainer.GetNext();
 815     auto  premultiplyOnLoad = (textureInfo.preMultiplyOnLoad && textureInfo.maskTextureId == INVALID_TEXTURE_ID) ? DevelAsyncImageLoader::PreMultiplyOnLoad::ON : DevelAsyncImageLoader::PreMultiplyOnLoad::OFF;
 816     DALI_ASSERT_ALWAYS(loadingHelperIt != loadersContainer.End());
 817     if(textureInfo.animatedImageLoading)
 818     {
 819       loadingHelperIt->LoadAnimatedImage(textureInfo.textureId, textureInfo.animatedImageLoading, textureInfo.frameIndex, premultiplyOnLoad);
 820     }
 821     else
 822     {
 823       loadingHelperIt->Load(textureInfo.textureId, textureInfo.url, textureInfo.desiredSize, textureInfo.fittingMode, textureInfo.samplingMode, textureInfo.orientationCorrection, premultiplyOnLoad);
 824     }
 825   }
 826   ObserveTexture(textureInfo, observer);
 827 }
 828
 829 void TextureManager::ProcessLoadQueue()
 830 {
 831   for(auto&& element : mLoadQueue)
 832   {
 833     if(!element.mObserver)
 834     {
 835       continue;
 836     }
 837
 838     TextureCacheIndex cacheIndex = mTextureCacheManager.GetCacheIndexFromId(element.mTextureId);
 839     if(cacheIndex != INVALID_CACHE_INDEX)
 840     {
 841       TextureInfo& textureInfo(mTextureCacheManager[cacheIndex]);
 842       if((textureInfo.loadState == LoadState::UPLOADED) || (textureInfo.loadState == LoadState::LOAD_FINISHED && textureInfo.storageType == StorageType::RETURN_PIXEL_BUFFER))
 843       {
 844         EmitLoadComplete(element.mObserver, textureInfo, true);
 845       }
 846       else
 847       {
 848         LoadTexture(textureInfo, element.mObserver);
 849       }
 850     }
 851   }
 852   mLoadQueue.Clear();
 853 }
 854
 855 void TextureManager::ProcessRemoveQueue()
 856 {
 857   for(const auto& textureId : mRemoveQueue)
 858   {
 859     mTextureCacheManager.RemoveCache(textureId);
 860   }
 861   mRemoveQueue.Clear();
 862 }
 863
 864 void TextureManager::ObserveTexture(TextureManager::TextureInfo& textureInfo,
 865                                     TextureUploadObserver*       observer)
 866 {
 867   DALI_LOG_INFO(gTextureManagerLogFilter, Debug::Concise, "TextureManager::ObserveTexture(): url:%s observer:%p\n", textureInfo.url.GetUrl().c_str(), observer);
 868
 869   if(observer)
 870   {
 871     textureInfo.observerList.PushBack(observer);
 872     observer->DestructionSignal().Connect(this, &TextureManager::ObserverDestroyed);
 873   }
 874 }
 875
 876 void TextureManager::AsyncLoadComplete(const TextureManager::TextureId& textureId, Devel::PixelBuffer pixelBuffer)
 877 {
 878   TextureCacheIndex cacheIndex = mTextureCacheManager.GetCacheIndexFromId(textureId);
 879   DALI_LOG_INFO(gTextureManagerLogFilter, Debug::Concise, "TextureManager::AsyncLoadComplete( textureId:%d CacheIndex:%d )\n", textureId, cacheIndex.GetIndex());
 880   if(cacheIndex != INVALID_CACHE_INDEX)
 881   {
 882     TextureInfo& textureInfo(mTextureCacheManager[cacheIndex]);
 883
 884     DALI_LOG_INFO(gTextureManagerLogFilter, Debug::Concise, "  textureId:%d Url:%s CacheIndex:%d LoadState: %s\n", textureInfo.textureId, textureInfo.url.GetUrl().c_str(), cacheIndex.GetIndex(), GET_LOAD_STATE_STRING(textureInfo.loadState));
 885
 886     if(textureInfo.loadState != LoadState::CANCELLED)
 887     {
 888       // textureInfo can be invalidated after this call (as the mTextureInfoContainer may be modified)
 889       PostLoad(textureInfo, pixelBuffer);
 890     }
 891     else
 892     {
 893       Remove(textureInfo.textureId, nullptr);
 894     }
 895   }
 896 }
 897
 898 void TextureManager::PostLoad(TextureManager::TextureInfo& textureInfo, Devel::PixelBuffer& pixelBuffer)
 899 {
 900   // Was the load successful?
 901   if(pixelBuffer && (pixelBuffer.GetWidth() != 0) && (pixelBuffer.GetHeight() != 0))
 902   {
 903     // No atlas support for now
 904     textureInfo.useAtlas      = UseAtlas::NO_ATLAS;
 905     textureInfo.preMultiplied = pixelBuffer.IsAlphaPreMultiplied();
 906
 907     if(textureInfo.storageType == StorageType::UPLOAD_TO_TEXTURE)
 908     {
 909       // If there is a mask texture ID associated with this texture, then apply the mask
 910       // if it's already loaded. If it hasn't, and the mask is still loading,
 911       // wait for the mask to finish loading.
 912       // note, If the texture is already uploaded synchronously during loading,
 913       // we don't need to apply mask.
 914       if(textureInfo.loadState != LoadState::UPLOADED &&
 915          textureInfo.maskTextureId != INVALID_TEXTURE_ID)
 916       {
 917         if(textureInfo.loadState == LoadState::MASK_APPLYING)
 918         {
 919           textureInfo.loadState = LoadState::MASK_APPLIED;
 920           UploadTexture(pixelBuffer, textureInfo);
 921           NotifyObservers(textureInfo, true);
 922         }
 923         else
 924         {
 925           LoadState maskLoadState = mTextureCacheManager.GetTextureStateInternal(textureInfo.maskTextureId);
 926           textureInfo.pixelBuffer = pixelBuffer; // Store the pixel buffer temporarily
 927           if(maskLoadState == LoadState::LOADING)
 928           {
 929             textureInfo.loadState = LoadState::WAITING_FOR_MASK;
 930           }
 931           else if(maskLoadState == LoadState::LOAD_FINISHED)
 932           {
 933             // Send New Task to Thread
 934             ApplyMask(textureInfo, textureInfo.maskTextureId);
 935           }
 936           else // maskLoadState == LoadState::LOAD_FAILED
 937           {
 938             // Url texture load success, But alpha mask texture load failed. Run as normal image upload.
 939             DALI_LOG_ERROR("Alpha mask image loading failed! Image will not be masked\n");
 940             UploadTexture(pixelBuffer, textureInfo);
 941             NotifyObservers(textureInfo, true);
 942           }
 943         }
 944       }
 945       else
 946       {
 947         UploadTexture(pixelBuffer, textureInfo);
 948         NotifyObservers(textureInfo, true);
 949       }
 950     }
 951     else
 952     {
 953       textureInfo.pixelBuffer = pixelBuffer; // Store the pixel data
 954       textureInfo.loadState   = LoadState::LOAD_FINISHED;
 955
 956       if(textureInfo.storageType == StorageType::RETURN_PIXEL_BUFFER)
 957       {
 958         NotifyObservers(textureInfo, true);
 959       }
 960       else
 961       {
 962         // Check if there was another texture waiting for this load to complete
 963         // (e.g. if this was an image mask, and its load is on a different thread)
 964         CheckForWaitingTexture(textureInfo);
 965       }
 966     }
 967   }
 968   else
 969   {
 970     textureInfo.loadState = LoadState::LOAD_FAILED;
 971     if(textureInfo.storageType != StorageType::KEEP_PIXEL_BUFFER)
 972     {
 973       NotifyObservers(textureInfo, false);
 974     }
 975     else // if(textureInfo.storageType == StorageType::KEEP_PIXEL_BUFFER) // image mask case
 976     {
 977       // Check if there was another texture waiting for this load to complete
 978       // (e.g. if this was an image mask, and its load is on a different thread)
 979       CheckForWaitingTexture(textureInfo);
 980     }
 981   }
 982 }
 983
 984 void TextureManager::CheckForWaitingTexture(TextureManager::TextureInfo& maskTextureInfo)
 985 {
 986   // Search the cache, checking if any texture has this texture id as a
 987   // maskTextureId:
 988   const std::size_t size = mTextureCacheManager.size();
 989
 990   const bool maskLoadSuccess = maskTextureInfo.loadState == LoadState::LOAD_FINISHED ? true : false;
 991
 992   // TODO : Refactorize here to not iterate whole cached image.
 993   for(TextureCacheIndex cacheIndex = TextureCacheIndex(TextureManagerType::TEXTURE_CACHE_INDEX_TYPE_LOCAL, 0u); cacheIndex.GetIndex() < size; ++cacheIndex.detailValue.index)
 994   {
 995     if(mTextureCacheManager[cacheIndex].maskTextureId == maskTextureInfo.textureId &&
 996        mTextureCacheManager[cacheIndex].loadState == LoadState::WAITING_FOR_MASK)
 997     {
 998       TextureInfo& textureInfo(mTextureCacheManager[cacheIndex]);
 999
1000       if(maskLoadSuccess)
1001       {
1002         // Send New Task to Thread
1003         ApplyMask(textureInfo, maskTextureInfo.textureId);
1004       }
1005       else
1006       {
1007         // Url texture load success, But alpha mask texture load failed. Run as normal image upload.
1008         DALI_LOG_ERROR("Alpha mask image loading failed! Image will not be masked\n");
1009         UploadTexture(textureInfo.pixelBuffer, textureInfo);
1010         NotifyObservers(textureInfo, true);
1011       }
1012     }
1013   }
1014 }
1015
1016 void TextureManager::ApplyMask(TextureManager::TextureInfo& textureInfo, const TextureManager::TextureId& maskTextureId)
1017 {
1018   TextureCacheIndex maskCacheIndex = mTextureCacheManager.GetCacheIndexFromId(maskTextureId);
1019   if(maskCacheIndex != INVALID_CACHE_INDEX)
1020   {
1021     Devel::PixelBuffer maskPixelBuffer = mTextureCacheManager[maskCacheIndex].pixelBuffer;
1022     Devel::PixelBuffer pixelBuffer     = textureInfo.pixelBuffer;
1023     textureInfo.pixelBuffer.Reset();
1024
1025     DALI_LOG_INFO(gTextureManagerLogFilter, Debug::Concise, "TextureManager::ApplyMask(): url:%s sync:%s\n", textureInfo.url.GetUrl().c_str(), textureInfo.loadSynchronously ? "T" : "F");
1026
1027     textureInfo.loadState   = LoadState::MASK_APPLYING;
1028     auto& loadersContainer  = (textureInfo.url.IsLocalResource() || textureInfo.url.IsBufferResource()) ? mAsyncLocalLoaders : mAsyncRemoteLoaders;
1029     auto  loadingHelperIt   = loadersContainer.GetNext();
1030     auto  premultiplyOnLoad = textureInfo.preMultiplyOnLoad ? DevelAsyncImageLoader::PreMultiplyOnLoad::ON : DevelAsyncImageLoader::PreMultiplyOnLoad::OFF;
1031     DALI_ASSERT_ALWAYS(loadingHelperIt != loadersContainer.End());
1032     loadingHelperIt->ApplyMask(textureInfo.textureId, pixelBuffer, maskPixelBuffer, textureInfo.scaleFactor, textureInfo.cropToMask, premultiplyOnLoad);
1033   }
1034 }
1035
1036 void TextureManager::UploadTexture(Devel::PixelBuffer& pixelBuffer, TextureManager::TextureInfo& textureInfo)
1037 {
1038   if(textureInfo.loadState != LoadState::UPLOADED && textureInfo.useAtlas != UseAtlas::USE_ATLAS)
1039   {
1040     DALI_LOG_INFO(gTextureManagerLogFilter, Debug::General, "  TextureManager::UploadTexture() New Texture for textureId:%d\n", textureInfo.textureId);
1041
1042     // Check if this pixelBuffer is premultiplied
1043     textureInfo.preMultiplied = pixelBuffer.IsAlphaPreMultiplied();
1044
1045     auto& renderingAddOn = RenderingAddOn::Get();
1046     if(renderingAddOn.IsValid())
1047     {
1048       renderingAddOn.CreateGeometry(textureInfo.textureId, pixelBuffer);
1049     }
1050
1051     Texture texture = Texture::New(Dali::TextureType::TEXTURE_2D, pixelBuffer.GetPixelFormat(), pixelBuffer.GetWidth(), pixelBuffer.GetHeight());
1052
1053     PixelData pixelData = Devel::PixelBuffer::Convert(pixelBuffer);
1054     texture.Upload(pixelData);
1055     if(!textureInfo.textureSet)
1056     {
1057       textureInfo.textureSet = TextureSet::New();
1058     }
1059     textureInfo.textureSet.SetTexture(0u, texture);
1060   }
1061
1062   // Update the load state.
1063   // Note: This is regardless of success as we care about whether a
1064   // load attempt is in progress or not.  If unsuccessful, a broken
1065   // image is still loaded.
1066   textureInfo.loadState = LoadState::UPLOADED;
1067 }
1068
1069 void TextureManager::NotifyObservers(TextureManager::TextureInfo& textureInfo, const bool& success)
1070 {
1071   TextureId textureId = textureInfo.textureId;
1072
1073   // If there is an observer: Notify the load is complete, whether successful or not,
1074   // and erase it from the list
1075   TextureInfo* info = &textureInfo;
1076
1077   if(info->animatedImageLoading)
1078   {
1079     // If loading failed, we don't need to get frameCount and frameInterval.
1080     if(success)
1081     {
1082       info->frameCount    = info->animatedImageLoading.GetImageCount();
1083       info->frameInterval = info->animatedImageLoading.GetFrameInterval(info->frameIndex);
1084     }
1085     info->animatedImageLoading.Reset();
1086   }
1087
1088   mQueueLoadFlag = true;
1089
1090   // Reverse observer list that we can pop_back the observer.
1091   std::reverse(info->observerList.Begin(), info->observerList.End());
1092
1093   while(info->observerList.Count())
1094   {
1095     TextureUploadObserver* observer = *(info->observerList.End() - 1u);
1096
1097     // During LoadComplete() a Control ResourceReady() signal is emitted.
1098     // During that signal the app may add remove /add Textures (e.g. via
1099     // ImageViews).
1100     // It is possible for observers to be removed from the observer list,
1101     // and it is also possible for the mTextureInfoContainer to be modified,
1102     // invalidating the reference to the textureInfo struct.
1103     // Texture load requests for the same URL are deferred until the end of this
1104     // method.
1105     DALI_LOG_INFO(gTextureManagerLogFilter, Debug::Concise, "TextureManager::NotifyObservers() textureId:%d url:%s loadState:%s\n", textureId, info->url.GetUrl().c_str(), GET_LOAD_STATE_STRING(info->loadState));
1106
1107     // It is possible for the observer to be deleted.
1108     // Disconnect and remove the observer first.
1109     observer->DestructionSignal().Disconnect(this, &TextureManager::ObserverDestroyed);
1110
1111     info->observerList.Erase(info->observerList.End() - 1u);
1112
1113     EmitLoadComplete(observer, *info, success);
1114
1115     // Get the textureInfo from the container again as it may have been invalidated.
1116     TextureCacheIndex textureInfoIndex = mTextureCacheManager.GetCacheIndexFromId(textureId);
1117     if(textureInfoIndex == INVALID_CACHE_INDEX)
1118     {
1119       break; // texture has been removed - can stop.
1120     }
1121     info = &mTextureCacheManager[textureInfoIndex];
1122   }
1123
1124   mQueueLoadFlag = false;
1125   ProcessLoadQueue();
1126   ProcessRemoveQueue();
1127
1128   if(info->storageType == StorageType::RETURN_PIXEL_BUFFER && info->observerList.Count() == 0)
1129   {
1130     Remove(info->textureId, nullptr);
1131   }
1132 }
1133
1134 void TextureManager::ObserverDestroyed(TextureUploadObserver* observer)
1135 {
1136   const std::size_t size = mTextureCacheManager.size();
1137   for(TextureCacheIndex cacheIndex = TextureCacheIndex(TextureManagerType::TEXTURE_CACHE_INDEX_TYPE_LOCAL, 0u); cacheIndex.GetIndex() < size; ++cacheIndex.detailValue.index)
1138   {
1139     TextureInfo& textureInfo(mTextureCacheManager[cacheIndex]);
1140     for(TextureInfo::ObserverListType::Iterator j = textureInfo.observerList.Begin();
1141         j != textureInfo.observerList.End();)
1142     {
1143       if(*j == observer)
1144       {
1145         j = textureInfo.observerList.Erase(j);
1146       }
1147       else
1148       {
1149         ++j;
1150       }
1151     }
1152   }
1153
1154   // Remove element from the LoadQueue
1155   for(auto&& element : mLoadQueue)
1156   {
1157     if(element.mObserver == observer)
1158     {
1159       element.mObserver = nullptr;
1160     }
1161   }
1162 }
1163
1164 Dali::Geometry TextureManager::GetRenderGeometry(const TextureManager::TextureId& textureId, std::uint32_t& frontElements, std::uint32_t& backElements)
1165 {
1166   return RenderingAddOn::Get().IsValid() ? RenderingAddOn::Get().GetGeometry(textureId, frontElements, backElements) : Geometry();
1167 }
1168
1169 void TextureManager::EmitLoadComplete(TextureUploadObserver* observer, TextureManager::TextureInfo& textureInfo, const bool& success)
1170 {
1171   if(textureInfo.storageType == StorageType::RETURN_PIXEL_BUFFER)
1172   {
1173     observer->LoadComplete(success, TextureUploadObserver::TextureInformation(TextureUploadObserver::ReturnType::PIXEL_BUFFER, textureInfo.pixelBuffer, textureInfo.url.GetUrl(), textureInfo.preMultiplied));
1174   }
1175   else if(textureInfo.isAnimatedImageFormat)
1176   {
1177     observer->LoadComplete(success, TextureUploadObserver::TextureInformation(TextureUploadObserver::ReturnType::ANIMATED_IMAGE_TEXTURE, textureInfo.textureId, textureInfo.frameCount, textureInfo.frameInterval));
1178   }
1179   else
1180   {
1181     observer->LoadComplete(success, TextureUploadObserver::TextureInformation(TextureUploadObserver::ReturnType::TEXTURE, textureInfo.textureId, textureInfo.textureSet, (textureInfo.useAtlas == UseAtlas::USE_ATLAS) ? true : false, textureInfo.atlasRect, textureInfo.preMultiplied));
1182   }
1183 }
1184
1185 } // namespace Internal
1186
1187 } // namespace Toolkit
1188
1189 } // namespace Dali