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   mQueueLoadFlag(false)
 127 {
 128   // Initialize the AddOn
 129   RenderingAddOn::Get();
 130 }
 131
 132 TextureManager::~TextureManager()
 133 {
 134   for(auto iter = mLifecycleObservers.Begin(), endIter = mLifecycleObservers.End(); iter != endIter; ++iter)
 135   {
 136     (*iter)->TextureManagerDestroyed();
 137   }
 138 }
 139
 140 TextureSet TextureManager::LoadAnimatedImageTexture(
 141   Dali::AnimatedImageLoading      animatedImageLoading,
 142   const std::uint32_t&            frameIndex,
 143   const Dali::SamplingMode::Type& samplingMode,
 144   const bool&                     synchronousLoading,
 145   TextureManager::TextureId&      textureId,
 146   const Dali::WrapMode::Type&     wrapModeU,
 147   const Dali::WrapMode::Type&     wrapModeV,
 148   TextureUploadObserver*          textureObserver)
 149 {
 150   TextureSet textureSet;
 151
 152   if(synchronousLoading)
 153   {
 154     Devel::PixelBuffer pixelBuffer;
 155     if(animatedImageLoading)
 156     {
 157       pixelBuffer = animatedImageLoading.LoadFrame(frameIndex);
 158     }
 159     if(!pixelBuffer)
 160     {
 161       DALI_LOG_ERROR("TextureManager::LoadAnimatedImageTexture: Synchronous loading is failed\n");
 162     }
 163     else
 164     {
 165       PixelData pixelData = Devel::PixelBuffer::Convert(pixelBuffer); // takes ownership of buffer
 166       if(!textureSet)
 167       {
 168         Texture texture = Texture::New(Dali::TextureType::TEXTURE_2D, pixelData.GetPixelFormat(), pixelData.GetWidth(), pixelData.GetHeight());
 169         texture.Upload(pixelData);
 170         textureSet = TextureSet::New();
 171         textureSet.SetTexture(0u, texture);
 172       }
 173     }
 174   }
 175   else
 176   {
 177     auto preMultiply                    = TextureManager::MultiplyOnLoad::LOAD_WITHOUT_MULTIPLY;
 178     textureId                           = RequestLoadInternal(animatedImageLoading.GetUrl(), INVALID_TEXTURE_ID, 1.0f, ImageDimensions(), FittingMode::SCALE_TO_FILL, SamplingMode::BOX_THEN_LINEAR, UseAtlas::NO_ATLAS, false, StorageType::UPLOAD_TO_TEXTURE, textureObserver, true, TextureManager::ReloadPolicy::CACHED, preMultiply, animatedImageLoading, frameIndex, false);
 179     TextureManager::LoadState loadState = mTextureCacheManager.GetTextureStateInternal(textureId);
 180     if(loadState == TextureManager::LoadState::UPLOADED)
 181     {
 182       // LoadComplete has already been called - keep the same texture set
 183       textureSet = GetTextureSet(textureId);
 184     }
 185   }
 186
 187   if(textureSet)
 188   {
 189     Sampler sampler = Sampler::New();
 190     sampler.SetWrapMode(wrapModeU, wrapModeV);
 191     textureSet.SetSampler(0u, sampler);
 192   }
 193
 194   return textureSet;
 195 }
 196
 197 Devel::PixelBuffer TextureManager::LoadPixelBuffer(
 198   const VisualUrl&                url,
 199   const Dali::ImageDimensions&    desiredSize,
 200   const Dali::FittingMode::Type&  fittingMode,
 201   const Dali::SamplingMode::Type& samplingMode,
 202   const bool&                     synchronousLoading,
 203   TextureUploadObserver*          textureObserver,
 204   const bool&                     orientationCorrection,
 205   TextureManager::MultiplyOnLoad& preMultiplyOnLoad)
 206 {
 207   Devel::PixelBuffer pixelBuffer;
 208   if(synchronousLoading)
 209   {
 210     if(url.IsValid())
 211     {
 212       if(url.IsBufferResource())
 213       {
 214         const EncodedImageBuffer& encodedImageBuffer = mTextureCacheManager.GetEncodedImageBuffer(url.GetUrl());
 215         if(encodedImageBuffer)
 216         {
 217           pixelBuffer = LoadImageFromBuffer(encodedImageBuffer.GetRawBuffer(), desiredSize, fittingMode, samplingMode, orientationCorrection);
 218         }
 219       }
 220       else
 221       {
 222         pixelBuffer = LoadImageFromFile(url.GetUrl(), desiredSize, fittingMode, samplingMode, orientationCorrection);
 223       }
 224       if(pixelBuffer && preMultiplyOnLoad == TextureManager::MultiplyOnLoad::MULTIPLY_ON_LOAD)
 225       {
 226         PreMultiply(pixelBuffer, preMultiplyOnLoad);
 227       }
 228     }
 229   }
 230   else
 231   {
 232     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);
 233   }
 234
 235   return pixelBuffer;
 236 }
 237
 238 TextureSet TextureManager::LoadTexture(
 239   const VisualUrl&                    url,
 240   const Dali::ImageDimensions&        desiredSize,
 241   const Dali::FittingMode::Type&      fittingMode,
 242   const Dali::SamplingMode::Type&     samplingMode,
 243   MaskingDataPointer&                 maskInfo,
 244   const bool&                         synchronousLoading,
 245   TextureManager::TextureId&          textureId,
 246   Vector4&                            textureRect,
 247   Dali::ImageDimensions&              textureRectSize,
 248   bool&                               atlasingStatus,
 249   bool&                               loadingStatus,
 250   const Dali::WrapMode::Type&         wrapModeU,
 251   const Dali::WrapMode::Type&         wrapModeV,
 252   TextureUploadObserver*              textureObserver,
 253   AtlasUploadObserver*                atlasObserver,
 254   ImageAtlasManagerPtr                imageAtlasManager,
 255   const bool&                         orientationCorrection,
 256   const TextureManager::ReloadPolicy& reloadPolicy,
 257   TextureManager::MultiplyOnLoad&     preMultiplyOnLoad)
 258 {
 259   TextureSet textureSet;
 260
 261   loadingStatus = false;
 262   textureRect   = FULL_ATLAS_RECT;
 263
 264   if(VisualUrl::TEXTURE == url.GetProtocolType())
 265   {
 266     std::string location = url.GetLocation();
 267     if(location.size() > 0u)
 268     {
 269       TextureId id = std::stoi(location);
 270       textureSet   = mTextureCacheManager.GetExternalTextureSet(id);
 271       if(textureSet)
 272       {
 273         preMultiplyOnLoad = TextureManager::MultiplyOnLoad::LOAD_WITHOUT_MULTIPLY;
 274         textureId         = id;
 275         return textureSet;
 276       }
 277     }
 278   }
 279   else
 280   {
 281     // For Atlas
 282     if(synchronousLoading && atlasingStatus && imageAtlasManager->CheckAtlasAvailable(url, desiredSize))
 283     {
 284       Devel::PixelBuffer pixelBuffer = LoadImageSynchronously(url, desiredSize, fittingMode, samplingMode, orientationCorrection);
 285
 286       if(maskInfo && maskInfo->mAlphaMaskUrl.IsValid())
 287       {
 288         Devel::PixelBuffer maskPixelBuffer = LoadImageSynchronously(maskInfo->mAlphaMaskUrl.GetUrl(), ImageDimensions(), FittingMode::SCALE_TO_FILL, SamplingMode::NO_FILTER, true);
 289         if(maskPixelBuffer)
 290         {
 291           pixelBuffer.ApplyMask(maskPixelBuffer, maskInfo->mContentScaleFactor, maskInfo->mCropToMask);
 292         }
 293       }
 294
 295       PixelData data;
 296       if(pixelBuffer)
 297       {
 298         PreMultiply(pixelBuffer, preMultiplyOnLoad);
 299         data = Devel::PixelBuffer::Convert(pixelBuffer); // takes ownership of buffer
 300
 301         if(data)
 302         {
 303           textureSet = imageAtlasManager->Add(textureRect, data);
 304           if(textureSet)
 305           {
 306             textureRectSize.SetWidth(data.GetWidth());
 307             textureRectSize.SetHeight(data.GetHeight());
 308           }
 309         }
 310         else
 311         {
 312           DALI_LOG_ERROR("TextureManager::LoadTexture: Synchronous Texture loading with atlasing is failed.\n");
 313         }
 314       }
 315       if(!textureSet)
 316       {
 317         atlasingStatus = false;
 318       }
 319     }
 320
 321     if(!textureSet)
 322     {
 323       loadingStatus = true;
 324       // Atlas manager can chage desired size when it is set by 0,0.
 325       // We should store into textureRectSize only if atlasing successed.
 326       // So copy inputed desiredSize, and replace value into textureRectSize only if atlasing success.
 327       Dali::ImageDimensions atlasDesiredSize = desiredSize;
 328       if(atlasingStatus)
 329       {
 330         textureSet = imageAtlasManager->Add(textureRect, url.GetUrl(), atlasDesiredSize, fittingMode, true, atlasObserver);
 331       }
 332       if(!textureSet) // big image, no atlasing or atlasing failed
 333       {
 334         atlasingStatus = false;
 335         if(!maskInfo || !maskInfo->mAlphaMaskUrl.IsValid())
 336         {
 337           textureId = RequestLoad(
 338             url,
 339             desiredSize,
 340             fittingMode,
 341             samplingMode,
 342             UseAtlas::NO_ATLAS,
 343             textureObserver,
 344             orientationCorrection,
 345             reloadPolicy,
 346             preMultiplyOnLoad,
 347             synchronousLoading);
 348         }
 349         else
 350         {
 351           maskInfo->mAlphaMaskId = RequestMaskLoad(maskInfo->mAlphaMaskUrl, synchronousLoading);
 352           textureId              = RequestLoad(
 353             url,
 354             maskInfo->mAlphaMaskId,
 355             maskInfo->mContentScaleFactor,
 356             desiredSize,
 357             fittingMode,
 358             samplingMode,
 359             UseAtlas::NO_ATLAS,
 360             maskInfo->mCropToMask,
 361             textureObserver,
 362             orientationCorrection,
 363             reloadPolicy,
 364             preMultiplyOnLoad,
 365             synchronousLoading);
 366         }
 367
 368         TextureManager::LoadState loadState = mTextureCacheManager.GetTextureStateInternal(textureId);
 369         if(loadState == TextureManager::LoadState::UPLOADED)
 370         {
 371           // LoadComplete has already been called - keep the same texture set
 372           textureSet = mTextureCacheManager.GetTextureSet(textureId);
 373         }
 374
 375         // If we are loading the texture, or waiting for the ready signal handler to complete, inform
 376         // caller that they need to wait.
 377         loadingStatus = (loadState == TextureManager::LoadState::LOADING ||
 378                          loadState == TextureManager::LoadState::WAITING_FOR_MASK ||
 379                          loadState == TextureManager::LoadState::MASK_APPLYING ||
 380                          loadState == TextureManager::LoadState::MASK_APPLIED ||
 381                          loadState == TextureManager::LoadState::NOT_STARTED ||
 382                          mQueueLoadFlag);
 383       }
 384       else
 385       {
 386         textureRectSize = atlasDesiredSize;
 387       }
 388     }
 389   }
 390
 391   if(!atlasingStatus && textureSet)
 392   {
 393     Sampler sampler = Sampler::New();
 394     sampler.SetWrapMode(wrapModeU, wrapModeV);
 395     textureSet.SetSampler(0u, sampler);
 396   }
 397
 398   if(synchronousLoading)
 399   {
 400     loadingStatus = false;
 401   }
 402
 403   return textureSet;
 404 }
 405
 406 TextureManager::TextureId TextureManager::RequestLoad(
 407   const VisualUrl&                    url,
 408   const ImageDimensions&              desiredSize,
 409   const Dali::FittingMode::Type&      fittingMode,
 410   const Dali::SamplingMode::Type&     samplingMode,
 411   const UseAtlas&                     useAtlas,
 412   TextureUploadObserver*              observer,
 413   const bool&                         orientationCorrection,
 414   const TextureManager::ReloadPolicy& reloadPolicy,
 415   TextureManager::MultiplyOnLoad&     preMultiplyOnLoad,
 416   const bool&                         synchronousLoading)
 417 {
 418   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);
 419 }
 420
 421 TextureManager::TextureId TextureManager::RequestLoad(
 422   const VisualUrl&                    url,
 423   const TextureManager::TextureId&    maskTextureId,
 424   const float&                        contentScale,
 425   const Dali::ImageDimensions&        desiredSize,
 426   const Dali::FittingMode::Type&      fittingMode,
 427   const Dali::SamplingMode::Type&     samplingMode,
 428   const TextureManager::UseAtlas&     useAtlas,
 429   const bool&                         cropToMask,
 430   TextureUploadObserver*              observer,
 431   const bool&                         orientationCorrection,
 432   const TextureManager::ReloadPolicy& reloadPolicy,
 433   TextureManager::MultiplyOnLoad&     preMultiplyOnLoad,
 434   const bool&                         synchronousLoading)
 435 {
 436   return RequestLoadInternal(url, maskTextureId, contentScale, desiredSize, fittingMode, samplingMode, useAtlas, cropToMask, StorageType::UPLOAD_TO_TEXTURE, observer, orientationCorrection, reloadPolicy, preMultiplyOnLoad, Dali::AnimatedImageLoading(), 0u, synchronousLoading);
 437 }
 438
 439 TextureManager::TextureId TextureManager::RequestMaskLoad(
 440   const VisualUrl& maskUrl,
 441   const bool&      synchronousLoading)
 442 {
 443   // Use the normal load procedure to get the alpha mask.
 444   auto preMultiply = TextureManager::MultiplyOnLoad::LOAD_WITHOUT_MULTIPLY;
 445   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);
 446 }
 447
 448 TextureManager::TextureId TextureManager::RequestLoadInternal(
 449   const VisualUrl&                    url,
 450   const TextureManager::TextureId&    maskTextureId,
 451   const float&                        contentScale,
 452   const Dali::ImageDimensions&        desiredSize,
 453   const Dali::FittingMode::Type&      fittingMode,
 454   const Dali::SamplingMode::Type&     samplingMode,
 455   const TextureManager::UseAtlas&     useAtlas,
 456   const bool&                         cropToMask,
 457   const TextureManager::StorageType&  storageType,
 458   TextureUploadObserver*              observer,
 459   const bool&                         orientationCorrection,
 460   const TextureManager::ReloadPolicy& reloadPolicy,
 461   TextureManager::MultiplyOnLoad&     preMultiplyOnLoad,
 462   Dali::AnimatedImageLoading          animatedImageLoading,
 463   const std::uint32_t&                frameIndex,
 464   const bool&                         synchronousLoading)
 465 {
 466   // First check if the requested Texture is cached.
 467   bool isAnimatedImage = (animatedImageLoading) ? true : false;
 468
 469   TextureHash       textureHash = INITIAL_HASH_NUMBER;
 470   TextureCacheIndex cacheIndex  = INVALID_CACHE_INDEX;
 471   if(storageType != StorageType::RETURN_PIXEL_BUFFER && !isAnimatedImage)
 472   {
 473     textureHash = mTextureCacheManager.GenerateHash(url.GetUrl(), desiredSize, fittingMode, samplingMode, useAtlas, maskTextureId);
 474
 475     // Look up the texture by hash. Note: The extra parameters are used in case of a hash collision.
 476     cacheIndex = mTextureCacheManager.FindCachedTexture(textureHash, url.GetUrl(), desiredSize, fittingMode, samplingMode, useAtlas, maskTextureId, preMultiplyOnLoad);
 477   }
 478
 479   TextureManager::TextureId textureId = INVALID_TEXTURE_ID;
 480   // Check if the requested Texture exists in the cache.
 481   if(cacheIndex != INVALID_CACHE_INDEX)
 482   {
 483     if(TextureManager::ReloadPolicy::CACHED == reloadPolicy)
 484     {
 485       // Mark this texture being used by another client resource. Forced reload would replace the current texture
 486       // without the need for incrementing the reference count.
 487       ++(mTextureCacheManager[cacheIndex].referenceCount);
 488     }
 489     textureId = mTextureCacheManager[cacheIndex].textureId;
 490
 491     // Update preMultiplyOnLoad value. It should be changed according to preMultiplied value of the cached info.
 492     preMultiplyOnLoad = mTextureCacheManager[cacheIndex].preMultiplied ? TextureManager::MultiplyOnLoad::MULTIPLY_ON_LOAD : TextureManager::MultiplyOnLoad::LOAD_WITHOUT_MULTIPLY;
 493
 494     DALI_LOG_INFO(gTextureManagerLogFilter, Debug::General, "TextureManager::RequestLoad( url=%s observer=%p ) Using cached texture id@%d, textureId=%d\n", url.GetUrl().c_str(), observer, cacheIndex, textureId);
 495   }
 496
 497   if(textureId == INVALID_TEXTURE_ID) // There was no caching, or caching not required
 498   {
 499     if(VisualUrl::BUFFER == url.GetProtocolType())
 500     {
 501       std::string location = url.GetLocation();
 502       if(location.size() > 0u)
 503       {
 504         TextureId                 targetId           = std::stoi(location);
 505         const EncodedImageBuffer& encodedImageBuffer = mTextureCacheManager.GetEncodedImageBuffer(targetId);
 506         if(encodedImageBuffer)
 507         {
 508           textureId = targetId;
 509
 510           // Increase EncodedImageBuffer reference during it contains mTextureInfoContainer.
 511           // TODO! We should change action when reload policy is FORCE.
 512           // Eunki Hong will fix it after refactoring patch merged.
 513           mTextureCacheManager.UseExternalResource(url.GetUrl());
 514         }
 515       }
 516     }
 517
 518     if(textureId == INVALID_TEXTURE_ID)
 519     {
 520       textureId = mTextureCacheManager.GenerateUniqueTextureId();
 521     }
 522
 523     bool preMultiply = (preMultiplyOnLoad == TextureManager::MultiplyOnLoad::MULTIPLY_ON_LOAD);
 524
 525     // Cache new texutre, and get cacheIndex.
 526     cacheIndex = mTextureCacheManager.AppendCache(TextureInfo(textureId, maskTextureId, url, desiredSize, contentScale, fittingMode, samplingMode, false, cropToMask, useAtlas, textureHash, orientationCorrection, preMultiply, animatedImageLoading, frameIndex));
 527
 528     DALI_LOG_INFO(gTextureManagerLogFilter, Debug::General, "TextureManager::RequestLoad( url=%s observer=%p ) New texture, cacheIndex:%d, textureId=%d\n", url.GetUrl().c_str(), observer, cacheIndex, textureId);
 529   }
 530
 531   // The below code path is common whether we are using the cache or not.
 532   // The textureInfoIndex now refers to either a pre-existing cached TextureInfo,
 533   // or a new TextureInfo just created.
 534   TextureInfo& textureInfo(mTextureCacheManager[cacheIndex]);
 535   textureInfo.maskTextureId         = maskTextureId;
 536   textureInfo.storageType           = storageType;
 537   textureInfo.orientationCorrection = orientationCorrection;
 538
 539   DALI_LOG_INFO(gTextureManagerLogFilter, Debug::General, "TextureInfo loadState:%s\n", GET_LOAD_STATE_STRING(textureInfo.loadState));
 540
 541   // Force reloading of texture by setting loadState unless already loading or cancelled.
 542   if(TextureManager::ReloadPolicy::FORCED == reloadPolicy &&
 543      TextureManager::LoadState::LOADING != textureInfo.loadState &&
 544      TextureManager::LoadState::WAITING_FOR_MASK != textureInfo.loadState &&
 545      TextureManager::LoadState::MASK_APPLYING != textureInfo.loadState &&
 546      TextureManager::LoadState::MASK_APPLIED != textureInfo.loadState &&
 547      TextureManager::LoadState::CANCELLED != textureInfo.loadState)
 548   {
 549     DALI_LOG_INFO(gTextureManagerLogFilter, Debug::Verbose, "TextureManager::RequestLoad( url=%s observer=%p ) ForcedReload cacheIndex:%d, textureId=%d\n", url.GetUrl().c_str(), observer, cacheIndex, textureId);
 550
 551     textureInfo.loadState = TextureManager::LoadState::NOT_STARTED;
 552   }
 553
 554   if(!synchronousLoading)
 555   {
 556     // Check if we should add the observer.
 557     // Only do this if we have not loaded yet and it will not have loaded by the end of this method.
 558     switch(textureInfo.loadState)
 559     {
 560       case TextureManager::LoadState::LOAD_FAILED: // Failed notifies observer which then stops observing.
 561       case TextureManager::LoadState::NOT_STARTED:
 562       {
 563         LoadOrQueueTexture(textureInfo, observer); // If called inside NotifyObservers, queues until afterwards
 564         break;
 565       }
 566       case TextureManager::LoadState::LOADING:
 567       case TextureManager::LoadState::WAITING_FOR_MASK:
 568       case TextureManager::LoadState::MASK_APPLYING:
 569       case TextureManager::LoadState::MASK_APPLIED:
 570       {
 571         ObserveTexture(textureInfo, observer);
 572         break;
 573       }
 574       case TextureManager::LoadState::UPLOADED:
 575       {
 576         if(observer)
 577         {
 578           LoadOrQueueTexture(textureInfo, observer);
 579         }
 580         break;
 581       }
 582       case TextureManager::LoadState::CANCELLED:
 583       {
 584         // A cancelled texture hasn't finished loading yet. Treat as a loading texture
 585         // (it's ref count has already been incremented, above)
 586         textureInfo.loadState = TextureManager::LoadState::LOADING;
 587         ObserveTexture(textureInfo, observer);
 588         break;
 589       }
 590       case TextureManager::LoadState::LOAD_FINISHED:
 591       {
 592         // Loading has already completed.
 593         if(observer && textureInfo.storageType == StorageType::RETURN_PIXEL_BUFFER)
 594         {
 595           LoadOrQueueTexture(textureInfo, observer);
 596         }
 597         break;
 598       }
 599     }
 600   }
 601   else
 602   {
 603     // If the image is already finished to load, use cached texture.
 604     // We don't need to consider Observer because this is synchronous loading.
 605     if(textureInfo.loadState == TextureManager::LoadState::UPLOADED ||
 606        textureInfo.loadState == TextureManager::LoadState::LOAD_FINISHED)
 607     {
 608       return textureId;
 609     }
 610     else
 611     {
 612       Devel::PixelBuffer pixelBuffer = LoadImageSynchronously(url, desiredSize, fittingMode, samplingMode, orientationCorrection);
 613
 614       if(!pixelBuffer)
 615       {
 616         // If pixelBuffer loading is failed in synchronously, call Remove() method.
 617         Remove(textureId, nullptr);
 618         return INVALID_TEXTURE_ID;
 619       }
 620
 621       if(storageType == StorageType::KEEP_PIXEL_BUFFER) // For the mask image loading.
 622       {
 623         textureInfo.pixelBuffer = pixelBuffer; // Store the pixel data
 624         textureInfo.loadState   = LoadState::LOAD_FINISHED;
 625       }
 626       else // For the image loading.
 627       {
 628         if(maskTextureId != INVALID_TEXTURE_ID)
 629         {
 630           TextureCacheIndex maskCacheIndex = mTextureCacheManager.GetCacheIndexFromId(maskTextureId);
 631           if(maskCacheIndex != INVALID_CACHE_INDEX)
 632           {
 633             Devel::PixelBuffer maskPixelBuffer = mTextureCacheManager[maskCacheIndex].pixelBuffer;
 634             if(maskPixelBuffer)
 635             {
 636               pixelBuffer.ApplyMask(maskPixelBuffer, contentScale, cropToMask);
 637             }
 638           }
 639           else
 640           {
 641             DALI_LOG_ERROR("Mask image is not stored in cache.\n");
 642           }
 643         }
 644         PreMultiply(pixelBuffer, preMultiplyOnLoad);
 645
 646         // Upload texture
 647         UploadTexture(pixelBuffer, textureInfo);
 648       }
 649     }
 650   }
 651
 652   // Return the TextureId for which this Texture can now be referenced by externally.
 653   return textureId;
 654 }
 655
 656 void TextureManager::Remove(const TextureManager::TextureId& textureId, TextureUploadObserver* observer)
 657 {
 658   // Remove textureId in CacheManager.
 659   mTextureCacheManager.RemoveCache(textureId);
 660
 661   if(observer)
 662   {
 663     // Remove element from the LoadQueue
 664     for(auto&& element : mLoadQueue)
 665     {
 666       if(element.mObserver == observer)
 667       {
 668         // Do not erase the item. We will clear it later in ProcessQueuedTextures().
 669         element.mObserver = nullptr;
 670         break;
 671       }
 672     }
 673   }
 674 }
 675
 676 Devel::PixelBuffer TextureManager::LoadImageSynchronously(
 677   const VisualUrl&                url,
 678   const Dali::ImageDimensions&    desiredSize,
 679   const Dali::FittingMode::Type&  fittingMode,
 680   const Dali::SamplingMode::Type& samplingMode,
 681   const bool&                     orientationCorrection)
 682 {
 683   Devel::PixelBuffer pixelBuffer;
 684   if(url.IsBufferResource())
 685   {
 686     const EncodedImageBuffer& encodedImageBuffer = mTextureCacheManager.GetEncodedImageBuffer(url.GetUrl());
 687     if(encodedImageBuffer)
 688     {
 689       pixelBuffer = LoadImageFromBuffer(encodedImageBuffer.GetRawBuffer(), desiredSize, fittingMode, samplingMode, orientationCorrection);
 690     }
 691   }
 692   else
 693   {
 694     pixelBuffer = LoadImageFromFile(url.GetUrl(), desiredSize, fittingMode, samplingMode, orientationCorrection);
 695   }
 696   return pixelBuffer;
 697 }
 698
 699 void TextureManager::AddObserver(TextureManager::LifecycleObserver& observer)
 700 {
 701   // make sure an observer doesn't observe the same object twice
 702   // otherwise it will get multiple calls to ObjectDestroyed()
 703   DALI_ASSERT_DEBUG(mLifecycleObservers.End() == std::find(mLifecycleObservers.Begin(), mLifecycleObservers.End(), &observer));
 704   mLifecycleObservers.PushBack(&observer);
 705 }
 706
 707 void TextureManager::RemoveObserver(TextureManager::LifecycleObserver& observer)
 708 {
 709   // Find the observer...
 710   auto endIter = mLifecycleObservers.End();
 711   for(auto iter = mLifecycleObservers.Begin(); iter != endIter; ++iter)
 712   {
 713     if((*iter) == &observer)
 714     {
 715       mLifecycleObservers.Erase(iter);
 716       break;
 717     }
 718   }
 719   DALI_ASSERT_DEBUG(endIter != mLifecycleObservers.End());
 720 }
 721
 722 void TextureManager::LoadOrQueueTexture(TextureManager::TextureInfo& textureInfo, TextureUploadObserver* observer)
 723 {
 724   switch(textureInfo.loadState)
 725   {
 726     case LoadState::NOT_STARTED:
 727     case LoadState::LOAD_FAILED:
 728     {
 729       if(mQueueLoadFlag)
 730       {
 731         QueueLoadTexture(textureInfo, observer);
 732       }
 733       else
 734       {
 735         LoadTexture(textureInfo, observer);
 736       }
 737       break;
 738     }
 739     case LoadState::UPLOADED:
 740     {
 741       if(mQueueLoadFlag)
 742       {
 743         QueueLoadTexture(textureInfo, observer);
 744       }
 745       else
 746       {
 747         // The Texture has already loaded. The other observers have already been notified.
 748         // We need to send a "late" loaded notification for this observer.
 749         observer->LoadComplete(true, TextureUploadObserver::TextureInformation(TextureUploadObserver::ReturnType::TEXTURE, textureInfo.textureId, textureInfo.textureSet, (textureInfo.useAtlas == UseAtlas::USE_ATLAS) ? true : false, textureInfo.atlasRect, textureInfo.preMultiplied));
 750       }
 751       break;
 752     }
 753     case LoadState::LOADING:
 754     case LoadState::CANCELLED:
 755     case LoadState::LOAD_FINISHED:
 756     case LoadState::WAITING_FOR_MASK:
 757     case LoadState::MASK_APPLYING:
 758     case LoadState::MASK_APPLIED:
 759     {
 760       break;
 761     }
 762   }
 763 }
 764
 765 void TextureManager::QueueLoadTexture(const TextureManager::TextureInfo& textureInfo, TextureUploadObserver* observer)
 766 {
 767   const auto& textureId = textureInfo.textureId;
 768   mLoadQueue.PushBack(LoadQueueElement(textureId, observer));
 769
 770   observer->DestructionSignal().Connect(this, &TextureManager::ObserverDestroyed);
 771 }
 772
 773 void TextureManager::LoadTexture(TextureManager::TextureInfo& textureInfo, TextureUploadObserver* observer)
 774 {
 775   DALI_LOG_INFO(gTextureManagerLogFilter, Debug::Concise, "TextureManager::LoadTexture(): url:%s sync:%s\n", textureInfo.url.GetUrl().c_str(), textureInfo.loadSynchronously ? "T" : "F");
 776
 777   textureInfo.loadState = LoadState::LOADING;
 778   if(!textureInfo.loadSynchronously)
 779   {
 780     auto& loadersContainer  = (textureInfo.url.IsLocalResource() || textureInfo.url.IsBufferResource()) ? mAsyncLocalLoaders : mAsyncRemoteLoaders;
 781     auto  loadingHelperIt   = loadersContainer.GetNext();
 782     auto  premultiplyOnLoad = (textureInfo.preMultiplyOnLoad && textureInfo.maskTextureId == INVALID_TEXTURE_ID) ? DevelAsyncImageLoader::PreMultiplyOnLoad::ON : DevelAsyncImageLoader::PreMultiplyOnLoad::OFF;
 783     DALI_ASSERT_ALWAYS(loadingHelperIt != loadersContainer.End());
 784     if(textureInfo.animatedImageLoading)
 785     {
 786       loadingHelperIt->LoadAnimatedImage(textureInfo.textureId, textureInfo.animatedImageLoading, textureInfo.frameIndex);
 787     }
 788     else
 789     {
 790       loadingHelperIt->Load(textureInfo.textureId, textureInfo.url, textureInfo.desiredSize, textureInfo.fittingMode, textureInfo.samplingMode, textureInfo.orientationCorrection, premultiplyOnLoad);
 791     }
 792   }
 793   ObserveTexture(textureInfo, observer);
 794 }
 795
 796 void TextureManager::ProcessQueuedTextures()
 797 {
 798   for(auto&& element : mLoadQueue)
 799   {
 800     if(!element.mObserver)
 801     {
 802       continue;
 803     }
 804
 805     TextureCacheIndex cacheIndex = mTextureCacheManager.GetCacheIndexFromId(element.mTextureId);
 806     if(cacheIndex != INVALID_CACHE_INDEX)
 807     {
 808       TextureInfo& textureInfo(mTextureCacheManager[cacheIndex]);
 809       if(textureInfo.loadState == LoadState::UPLOADED)
 810       {
 811         element.mObserver->LoadComplete(true, TextureUploadObserver::TextureInformation(TextureUploadObserver::ReturnType::TEXTURE, textureInfo.textureId, textureInfo.textureSet, (textureInfo.useAtlas == UseAtlas::USE_ATLAS) ? true : false, textureInfo.atlasRect, textureInfo.preMultiplied));
 812       }
 813       else if(textureInfo.loadState == LoadState::LOAD_FINISHED && textureInfo.storageType == StorageType::RETURN_PIXEL_BUFFER)
 814       {
 815         element.mObserver->LoadComplete(true, TextureUploadObserver::TextureInformation(TextureUploadObserver::ReturnType::PIXEL_BUFFER, textureInfo.pixelBuffer, textureInfo.url.GetUrl(), textureInfo.preMultiplied));
 816       }
 817       else
 818       {
 819         LoadTexture(textureInfo, element.mObserver);
 820       }
 821     }
 822   }
 823   mLoadQueue.Clear();
 824 }
 825
 826 void TextureManager::ObserveTexture(TextureManager::TextureInfo& textureInfo,
 827                                     TextureUploadObserver*       observer)
 828 {
 829   DALI_LOG_INFO(gTextureManagerLogFilter, Debug::Concise, "TextureManager::ObserveTexture(): url:%s observer:%p\n", textureInfo.url.GetUrl().c_str(), observer);
 830
 831   if(observer)
 832   {
 833     textureInfo.observerList.PushBack(observer);
 834     observer->DestructionSignal().Connect(this, &TextureManager::ObserverDestroyed);
 835   }
 836 }
 837
 838 void TextureManager::AsyncLoadComplete(const TextureManager::TextureId& textureId, Devel::PixelBuffer pixelBuffer)
 839 {
 840   DALI_LOG_INFO(gTextureManagerLogFilter, Debug::Concise, "TextureManager::AsyncLoadComplete( textureId:%d )\n", textureId);
 841   TextureCacheIndex cacheIndex = mTextureCacheManager.GetCacheIndexFromId(textureId);
 842   if(cacheIndex != INVALID_CACHE_INDEX)
 843   {
 844     TextureInfo& textureInfo(mTextureCacheManager[cacheIndex]);
 845
 846     DALI_LOG_INFO(gTextureManagerLogFilter, Debug::Concise, "  textureId:%d Url:%s CacheIndex:%d LoadState: %s\n", textureInfo.textureId, textureInfo.url.GetUrl().c_str(), cacheIndex, GET_LOAD_STATE_STRING(textureInfo.loadState));
 847
 848     if(textureInfo.loadState != LoadState::CANCELLED)
 849     {
 850       // textureInfo can be invalidated after this call (as the mTextureInfoContainer may be modified)
 851       PostLoad(textureInfo, pixelBuffer);
 852     }
 853     else
 854     {
 855       Remove(textureInfo.textureId, nullptr);
 856     }
 857   }
 858 }
 859
 860 void TextureManager::PostLoad(TextureManager::TextureInfo& textureInfo, Devel::PixelBuffer& pixelBuffer)
 861 {
 862   // Was the load successful?
 863   if(pixelBuffer && (pixelBuffer.GetWidth() != 0) && (pixelBuffer.GetHeight() != 0))
 864   {
 865     // No atlas support for now
 866     textureInfo.useAtlas      = UseAtlas::NO_ATLAS;
 867     textureInfo.preMultiplied = pixelBuffer.IsAlphaPreMultiplied();
 868
 869     if(textureInfo.storageType == StorageType::UPLOAD_TO_TEXTURE)
 870     {
 871       // If there is a mask texture ID associated with this texture, then apply the mask
 872       // if it's already loaded. If it hasn't, and the mask is still loading,
 873       // wait for the mask to finish loading.
 874       // note, If the texture is already uploaded synchronously during loading,
 875       // we don't need to apply mask.
 876       if(textureInfo.loadState != LoadState::UPLOADED &&
 877          textureInfo.maskTextureId != INVALID_TEXTURE_ID)
 878       {
 879         if(textureInfo.loadState == LoadState::MASK_APPLYING)
 880         {
 881           textureInfo.loadState = LoadState::MASK_APPLIED;
 882           UploadTexture(pixelBuffer, textureInfo);
 883           NotifyObservers(textureInfo, true);
 884         }
 885         else
 886         {
 887           LoadState maskLoadState = mTextureCacheManager.GetTextureStateInternal(textureInfo.maskTextureId);
 888           textureInfo.pixelBuffer = pixelBuffer; // Store the pixel buffer temporarily
 889           if(maskLoadState == LoadState::LOADING)
 890           {
 891             textureInfo.loadState = LoadState::WAITING_FOR_MASK;
 892           }
 893           else if(maskLoadState == LoadState::LOAD_FINISHED)
 894           {
 895             // Send New Task to Thread
 896             ApplyMask(textureInfo, textureInfo.maskTextureId);
 897           }
 898         }
 899       }
 900       else
 901       {
 902         UploadTexture(pixelBuffer, textureInfo);
 903         NotifyObservers(textureInfo, true);
 904       }
 905     }
 906     else
 907     {
 908       textureInfo.pixelBuffer = pixelBuffer; // Store the pixel data
 909       textureInfo.loadState   = LoadState::LOAD_FINISHED;
 910
 911       if(textureInfo.storageType == StorageType::RETURN_PIXEL_BUFFER)
 912       {
 913         NotifyObservers(textureInfo, true);
 914       }
 915       else
 916       {
 917         // Check if there was another texture waiting for this load to complete
 918         // (e.g. if this was an image mask, and its load is on a different thread)
 919         CheckForWaitingTexture(textureInfo);
 920       }
 921     }
 922   }
 923   else
 924   {
 925     textureInfo.loadState = LoadState::LOAD_FAILED;
 926     CheckForWaitingTexture(textureInfo);
 927     NotifyObservers(textureInfo, false);
 928   }
 929 }
 930
 931 void TextureManager::CheckForWaitingTexture(TextureManager::TextureInfo& maskTextureInfo)
 932 {
 933   // Search the cache, checking if any texture has this texture id as a
 934   // maskTextureId:
 935   const TextureCacheIndex size = static_cast<TextureCacheIndex>(mTextureCacheManager.size());
 936
 937   for(TextureCacheIndex cacheIndex = 0; cacheIndex < size; ++cacheIndex)
 938   {
 939     if(mTextureCacheManager[cacheIndex].maskTextureId == maskTextureInfo.textureId &&
 940        mTextureCacheManager[cacheIndex].loadState == LoadState::WAITING_FOR_MASK)
 941     {
 942       TextureInfo& textureInfo(mTextureCacheManager[cacheIndex]);
 943
 944       if(maskTextureInfo.loadState == LoadState::LOAD_FINISHED)
 945       {
 946         // Send New Task to Thread
 947         ApplyMask(textureInfo, maskTextureInfo.textureId);
 948       }
 949       else
 950       {
 951         textureInfo.pixelBuffer.Reset();
 952         textureInfo.loadState = LoadState::LOAD_FAILED;
 953         NotifyObservers(textureInfo, false);
 954       }
 955     }
 956   }
 957 }
 958
 959 void TextureManager::ApplyMask(TextureManager::TextureInfo& textureInfo, const TextureManager::TextureId& maskTextureId)
 960 {
 961   TextureCacheIndex maskCacheIndex = mTextureCacheManager.GetCacheIndexFromId(maskTextureId);
 962   if(maskCacheIndex != INVALID_CACHE_INDEX)
 963   {
 964     Devel::PixelBuffer maskPixelBuffer = mTextureCacheManager[maskCacheIndex].pixelBuffer;
 965     Devel::PixelBuffer pixelBuffer     = textureInfo.pixelBuffer;
 966     textureInfo.pixelBuffer.Reset();
 967
 968     DALI_LOG_INFO(gTextureManagerLogFilter, Debug::Concise, "TextureManager::ApplyMask(): url:%s sync:%s\n", textureInfo.url.GetUrl().c_str(), textureInfo.loadSynchronously ? "T" : "F");
 969
 970     textureInfo.loadState   = LoadState::MASK_APPLYING;
 971     auto& loadersContainer  = (textureInfo.url.IsLocalResource() || textureInfo.url.IsBufferResource()) ? mAsyncLocalLoaders : mAsyncRemoteLoaders;
 972     auto  loadingHelperIt   = loadersContainer.GetNext();
 973     auto  premultiplyOnLoad = textureInfo.preMultiplyOnLoad ? DevelAsyncImageLoader::PreMultiplyOnLoad::ON : DevelAsyncImageLoader::PreMultiplyOnLoad::OFF;
 974     DALI_ASSERT_ALWAYS(loadingHelperIt != loadersContainer.End());
 975     loadingHelperIt->ApplyMask(textureInfo.textureId, pixelBuffer, maskPixelBuffer, textureInfo.scaleFactor, textureInfo.cropToMask, premultiplyOnLoad);
 976   }
 977 }
 978
 979 void TextureManager::UploadTexture(Devel::PixelBuffer& pixelBuffer, TextureManager::TextureInfo& textureInfo)
 980 {
 981   if(textureInfo.loadState != LoadState::UPLOADED && textureInfo.useAtlas != UseAtlas::USE_ATLAS)
 982   {
 983     DALI_LOG_INFO(gTextureManagerLogFilter, Debug::General, "  TextureManager::UploadTexture() New Texture for textureId:%d\n", textureInfo.textureId);
 984
 985     // Check if this pixelBuffer is premultiplied
 986     textureInfo.preMultiplied = pixelBuffer.IsAlphaPreMultiplied();
 987
 988     auto& renderingAddOn = RenderingAddOn::Get();
 989     if(renderingAddOn.IsValid())
 990     {
 991       renderingAddOn.CreateGeometry(textureInfo.textureId, pixelBuffer);
 992     }
 993
 994     Texture texture = Texture::New(Dali::TextureType::TEXTURE_2D, pixelBuffer.GetPixelFormat(), pixelBuffer.GetWidth(), pixelBuffer.GetHeight());
 995
 996     PixelData pixelData = Devel::PixelBuffer::Convert(pixelBuffer);
 997     texture.Upload(pixelData);
 998     if(!textureInfo.textureSet)
 999     {
1000       textureInfo.textureSet = TextureSet::New();
1001     }
1002     textureInfo.textureSet.SetTexture(0u, texture);
1003   }
1004
1005   // Update the load state.
1006   // Note: This is regardless of success as we care about whether a
1007   // load attempt is in progress or not.  If unsuccessful, a broken
1008   // image is still loaded.
1009   textureInfo.loadState = LoadState::UPLOADED;
1010 }
1011
1012 void TextureManager::NotifyObservers(TextureManager::TextureInfo& textureInfo, const bool& success)
1013 {
1014   TextureId textureId = textureInfo.textureId;
1015
1016   // If there is an observer: Notify the load is complete, whether successful or not,
1017   // and erase it from the list
1018   TextureInfo* info = &textureInfo;
1019
1020   mQueueLoadFlag = true;
1021
1022   while(info->observerList.Count())
1023   {
1024     TextureUploadObserver* observer = info->observerList[0];
1025
1026     // During LoadComplete() a Control ResourceReady() signal is emitted.
1027     // During that signal the app may add remove /add Textures (e.g. via
1028     // ImageViews).
1029     // It is possible for observers to be removed from the observer list,
1030     // and it is also possible for the mTextureInfoContainer to be modified,
1031     // invalidating the reference to the textureInfo struct.
1032     // Texture load requests for the same URL are deferred until the end of this
1033     // method.
1034     DALI_LOG_INFO(gTextureManagerLogFilter, Debug::Concise, "TextureManager::NotifyObservers() textureId:%d url:%s loadState:%s\n", textureId, textureInfo.url.GetUrl().c_str(), GET_LOAD_STATE_STRING(textureInfo.loadState));
1035
1036     // It is possible for the observer to be deleted.
1037     // Disconnect and remove the observer first.
1038     observer->DestructionSignal().Disconnect(this, &TextureManager::ObserverDestroyed);
1039
1040     info->observerList.Erase(info->observerList.Begin());
1041
1042     if(info->storageType == StorageType::RETURN_PIXEL_BUFFER)
1043     {
1044       observer->LoadComplete(success, TextureUploadObserver::TextureInformation(TextureUploadObserver::ReturnType::PIXEL_BUFFER, info->pixelBuffer, info->url.GetUrl(), info->preMultiplied));
1045     }
1046     else
1047     {
1048       observer->LoadComplete(success, TextureUploadObserver::TextureInformation(TextureUploadObserver::ReturnType::TEXTURE, info->textureId, info->textureSet, (info->useAtlas == UseAtlas::USE_ATLAS) ? true : false, info->atlasRect, info->preMultiplied));
1049     }
1050
1051     // Get the textureInfo from the container again as it may have been invalidated.
1052     TextureCacheIndex textureInfoIndex = mTextureCacheManager.GetCacheIndexFromId(textureId);
1053     if(textureInfoIndex == INVALID_CACHE_INDEX)
1054     {
1055       break; // texture has been removed - can stop.
1056     }
1057     info = &mTextureCacheManager[textureInfoIndex];
1058   }
1059
1060   mQueueLoadFlag = false;
1061   ProcessQueuedTextures();
1062
1063   if(info->storageType == StorageType::RETURN_PIXEL_BUFFER && info->observerList.Count() == 0)
1064   {
1065     Remove(info->textureId, nullptr);
1066   }
1067 }
1068
1069 void TextureManager::ObserverDestroyed(TextureUploadObserver* observer)
1070 {
1071   const TextureCacheIndex count = static_cast<TextureCacheIndex>(mTextureCacheManager.size());
1072   for(TextureCacheIndex i = 0; i < count; ++i)
1073   {
1074     TextureInfo& textureInfo(mTextureCacheManager[i]);
1075     for(TextureInfo::ObserverListType::Iterator j = textureInfo.observerList.Begin();
1076         j != textureInfo.observerList.End();)
1077     {
1078       if(*j == observer)
1079       {
1080         j = textureInfo.observerList.Erase(j);
1081       }
1082       else
1083       {
1084         ++j;
1085       }
1086     }
1087   }
1088
1089   // Remove element from the LoadQueue
1090   for(auto&& element : mLoadQueue)
1091   {
1092     if(element.mObserver == observer)
1093     {
1094       element.mObserver = nullptr;
1095     }
1096   }
1097 }
1098
1099 Dali::Geometry TextureManager::GetRenderGeometry(const TextureManager::TextureId& textureId, std::uint32_t& frontElements, std::uint32_t& backElements)
1100 {
1101   return RenderingAddOn::Get().IsValid() ? RenderingAddOn::Get().GetGeometry(textureId, frontElements, backElements) : Geometry();
1102 }
1103
1104 } // namespace Internal
1105
1106 } // namespace Toolkit
1107
1108 } // namespace Dali