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

   1  /*
   2  * Copyright (c) 2020 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 <dali-toolkit/internal/visuals/texture-manager-impl.h>
  20
  21 // EXTERNAL HEADERS
  22 #include <cstdlib>
  23 #include <string>
  24 #include <dali/public-api/math/vector4.h>
  25 #include <dali/devel-api/adaptor-framework/environment-variable.h>
  26 #include <dali/devel-api/adaptor-framework/image-loading.h>
  27 #include <dali/devel-api/common/hash.h>
  28 #include <dali/devel-api/adaptor-framework/pixel-buffer.h>
  29 #include <dali/integration-api/debug.h>
  30 #include <dali/public-api/rendering/geometry.h>
  31
  32 // INTERNAL HEADERS
  33 #include <dali-toolkit/internal/image-loader/image-atlas-impl.h>
  34 #include <dali-toolkit/public-api/image-loader/sync-image-loader.h>
  35 #include <dali-toolkit/internal/visuals/image-atlas-manager.h>
  36 #include <dali-toolkit/internal/visuals/rendering-addon.h>
  37
  38 namespace
  39 {
  40
  41 constexpr auto INITIAL_CACHE_NUMBER = size_t{0u};
  42 constexpr auto DEFAULT_NUMBER_OF_LOCAL_LOADER_THREADS = size_t{4u};
  43 constexpr auto DEFAULT_NUMBER_OF_REMOTE_LOADER_THREADS = size_t{8u};
  44
  45 constexpr auto NUMBER_OF_LOCAL_LOADER_THREADS_ENV = "DALI_TEXTURE_LOCAL_THREADS";
  46 constexpr auto NUMBER_OF_REMOTE_LOADER_THREADS_ENV = "DALI_TEXTURE_REMOTE_THREADS";
  47
  48 size_t GetNumberOfThreads(const char* environmentVariable, size_t defaultValue)
  49 {
  50   using Dali::EnvironmentVariable::GetEnvironmentVariable;
  51   auto numberString = GetEnvironmentVariable(environmentVariable);
  52   auto numberOfThreads = numberString ? std::strtoul(numberString, nullptr, 10) : 0;
  53   constexpr auto MAX_NUMBER_OF_THREADS = 100u;
  54   DALI_ASSERT_DEBUG( numberOfThreads < MAX_NUMBER_OF_THREADS );
  55   return ( numberOfThreads > 0 && numberOfThreads < MAX_NUMBER_OF_THREADS ) ? numberOfThreads : defaultValue;
  56 }
  57
  58 size_t GetNumberOfLocalLoaderThreads()
  59 {
  60   return GetNumberOfThreads(NUMBER_OF_LOCAL_LOADER_THREADS_ENV, DEFAULT_NUMBER_OF_LOCAL_LOADER_THREADS);
  61 }
  62
  63 size_t GetNumberOfRemoteLoaderThreads()
  64 {
  65   return GetNumberOfThreads(NUMBER_OF_REMOTE_LOADER_THREADS_ENV, DEFAULT_NUMBER_OF_REMOTE_LOADER_THREADS);
  66 }
  67
  68 } // namespace
  69
  70 namespace Dali
  71 {
  72
  73 namespace Toolkit
  74 {
  75
  76 namespace Internal
  77 {
  78
  79 namespace
  80 {
  81
  82 #ifdef DEBUG_ENABLED
  83 Debug::Filter* gTextureManagerLogFilter = Debug::Filter::New( Debug::NoLogging, false, "LOG_TEXTURE_MANAGER" );
  84
  85 #define GET_LOAD_STATE_STRING( loadState ) \
  86   loadState == TextureManager::LoadState::NOT_STARTED ? "NOT_STARTED" :             \
  87     loadState == TextureManager::LoadState::LOADING ? "LOADING" :                   \
  88     loadState == TextureManager::LoadState::LOAD_FINISHED ? "LOAD_FINISHED" :       \
  89     loadState == TextureManager::LoadState::WAITING_FOR_MASK ? "WAITING_FOR_MASK" : \
  90     loadState == TextureManager::LoadState::MASK_APPLYING ? "MASK_APPLYING" :         \
  91     loadState == TextureManager::LoadState::MASK_APPLIED ? "MASK_APPLIED" :         \
  92     loadState == TextureManager::LoadState::UPLOADED ? "UPLOADED" :                 \
  93     loadState == TextureManager::LoadState::CANCELLED ? "CANCELLED" :               \
  94     loadState == TextureManager::LoadState::LOAD_FAILED ? "LOAD_FAILED" : "Unknown"
  95
  96 #endif
  97
  98 const uint32_t      DEFAULT_ATLAS_SIZE( 1024u );                     ///< This size can fit 8 by 8 images of average size 128 * 128
  99 const Vector4       FULL_ATLAS_RECT( 0.0f, 0.0f, 1.0f, 1.0f );       ///< UV Rectangle that covers the full Texture
 100 const int           INVALID_INDEX( -1 );                             ///< Invalid index used to represent a non-existant TextureInfo struct
 101 const int           INVALID_CACHE_INDEX( -1 ); ///< Invalid Cache index
 102
 103
 104 void PreMultiply( Devel::PixelBuffer pixelBuffer, TextureManager::MultiplyOnLoad& preMultiplyOnLoad )
 105 {
 106   if( Pixel::HasAlpha( pixelBuffer.GetPixelFormat() ) )
 107   {
 108     if( preMultiplyOnLoad == TextureManager::MultiplyOnLoad::MULTIPLY_ON_LOAD )
 109     {
 110       pixelBuffer.MultiplyColorByAlpha();
 111     }
 112   }
 113   else
 114   {
 115     preMultiplyOnLoad = TextureManager::MultiplyOnLoad::LOAD_WITHOUT_MULTIPLY;
 116   }
 117 }
 118
 119 } // Anonymous namespace
 120
 121 TextureManager::MaskingData::MaskingData()
 122 : mAlphaMaskUrl(),
 123   mAlphaMaskId( INVALID_TEXTURE_ID ),
 124   mContentScaleFactor( 1.0f ),
 125   mCropToMask( true )
 126 {
 127 }
 128
 129 TextureManager::TextureManager()
 130 : mAsyncLocalLoaders( GetNumberOfLocalLoaderThreads(), [&]() { return AsyncLoadingHelper(*this); } ),
 131   mAsyncRemoteLoaders( GetNumberOfRemoteLoaderThreads(), [&]() { return AsyncLoadingHelper(*this); } ),
 132   mExternalTextures(),
 133   mLifecycleObservers(),
 134   mLoadQueue(),
 135   mBrokenImageUrl(""),
 136   mCurrentTextureId( 0 ),
 137   mQueueLoadFlag(false)
 138 {
 139   // Initialize the AddOn
 140   RenderingAddOn::Get();
 141 }
 142
 143 TextureManager::~TextureManager()
 144 {
 145   for( auto iter = mLifecycleObservers.Begin(), endIter = mLifecycleObservers.End(); iter != endIter; ++iter)
 146   {
 147     (*iter)->TextureManagerDestroyed();
 148   }
 149 }
 150
 151 TextureSet TextureManager::LoadAnimatedImageTexture(
 152   Dali::AnimatedImageLoading animatedImageLoading, uint32_t frameIndex, Dali::SamplingMode::Type samplingMode,
 153   bool synchronousLoading, TextureManager::TextureId& textureId, Dali::WrapMode::Type wrapModeU, Dali::WrapMode::Type wrapModeV, TextureUploadObserver* textureObserver )
 154 {
 155   TextureSet textureSet;
 156
 157   if( synchronousLoading )
 158   {
 159     Devel::PixelBuffer pixelBuffer;
 160     if( animatedImageLoading )
 161     {
 162       pixelBuffer = animatedImageLoading.LoadFrame( frameIndex );
 163     }
 164     if( !pixelBuffer )
 165     {
 166       // use broken image
 167       pixelBuffer = LoadImageFromFile( mBrokenImageUrl );
 168       PixelData pixelData;
 169       if( pixelBuffer )
 170       {
 171         pixelData = Devel::PixelBuffer::Convert(pixelBuffer); // takes ownership of buffer
 172       }
 173       Texture texture = Texture::New( Dali::TextureType::TEXTURE_2D, pixelData.GetPixelFormat(),
 174                                       pixelData.GetWidth(), pixelData.GetHeight() );
 175       texture.Upload( pixelData );
 176       textureSet = TextureSet::New();
 177       textureSet.SetTexture( 0u, texture );
 178     }
 179     else
 180     {
 181       PixelData pixelData = Devel::PixelBuffer::Convert(pixelBuffer); // takes ownership of buffer
 182       if( !textureSet )
 183       {
 184         Texture texture = Texture::New( Dali::TextureType::TEXTURE_2D, pixelData.GetPixelFormat(),
 185                                         pixelData.GetWidth(), pixelData.GetHeight() );
 186         texture.Upload( pixelData );
 187         textureSet = TextureSet::New();
 188         textureSet.SetTexture( 0u, texture );
 189       }
 190     }
 191   }
 192   else
 193   {
 194     auto preMultiply = TextureManager::MultiplyOnLoad::LOAD_WITHOUT_MULTIPLY;
 195     textureId = RequestLoadInternal( animatedImageLoading.GetUrl(), INVALID_TEXTURE_ID, 1.0f, ImageDimensions(), FittingMode::SCALE_TO_FILL,
 196                                      SamplingMode::BOX_THEN_LINEAR, TextureManager::NO_ATLAS, false, StorageType::UPLOAD_TO_TEXTURE, textureObserver,
 197                                      true, TextureManager::ReloadPolicy::CACHED, preMultiply, animatedImageLoading, frameIndex );
 198     TextureManager::LoadState loadState = GetTextureStateInternal( textureId );
 199     if( loadState == TextureManager::LoadState::UPLOADED )
 200     {
 201       // UploadComplete has already been called - keep the same texture set
 202       textureSet = GetTextureSet( textureId );
 203     }
 204   }
 205
 206   if( textureSet )
 207   {
 208     Sampler sampler = Sampler::New();
 209     sampler.SetWrapMode(  wrapModeU, wrapModeV  );
 210     textureSet.SetSampler( 0u, sampler );
 211   }
 212
 213   return textureSet;
 214 }
 215
 216 Devel::PixelBuffer TextureManager::LoadPixelBuffer(
 217   const VisualUrl& url, Dali::ImageDimensions desiredSize, Dali::FittingMode::Type fittingMode, Dali::SamplingMode::Type samplingMode, bool synchronousLoading, TextureUploadObserver* textureObserver, bool orientationCorrection, TextureManager::MultiplyOnLoad& preMultiplyOnLoad )
 218 {
 219   Devel::PixelBuffer pixelBuffer;
 220   if( synchronousLoading )
 221   {
 222     if( url.IsValid() )
 223     {
 224       pixelBuffer = LoadImageFromFile( url.GetUrl(), desiredSize, fittingMode, samplingMode,
 225                                        orientationCorrection  );
 226       if( pixelBuffer && preMultiplyOnLoad == TextureManager::MultiplyOnLoad::MULTIPLY_ON_LOAD )
 227       {
 228         PreMultiply( pixelBuffer, preMultiplyOnLoad );
 229       }
 230     }
 231   }
 232   else
 233   {
 234     RequestLoadInternal( url, INVALID_TEXTURE_ID, 1.0f, desiredSize, fittingMode, samplingMode, TextureManager::NO_ATLAS,
 235                          false, StorageType::RETURN_PIXEL_BUFFER, textureObserver, orientationCorrection, TextureManager::ReloadPolicy::FORCED,
 236                          preMultiplyOnLoad, Dali::AnimatedImageLoading(), 0u );
 237   }
 238
 239   return pixelBuffer;
 240 }
 241
 242 TextureSet TextureManager::LoadTexture(
 243   const VisualUrl& url, Dali::ImageDimensions desiredSize, Dali::FittingMode::Type fittingMode,
 244   Dali::SamplingMode::Type samplingMode, MaskingDataPointer& maskInfo,
 245   bool synchronousLoading, TextureManager::TextureId& textureId, Vector4& textureRect,
 246   Dali::ImageDimensions& textureRectSize, bool& atlasingStatus, bool& loadingStatus,
 247   Dali::WrapMode::Type wrapModeU, Dali::WrapMode::Type wrapModeV, TextureUploadObserver* textureObserver,
 248   AtlasUploadObserver* atlasObserver, ImageAtlasManagerPtr imageAtlasManager, bool orientationCorrection,
 249   TextureManager::ReloadPolicy reloadPolicy, TextureManager::MultiplyOnLoad& preMultiplyOnLoad )
 250 {
 251   TextureSet textureSet;
 252
 253   loadingStatus = false;
 254   textureRect = FULL_ATLAS_RECT;
 255
 256   if( VisualUrl::TEXTURE == url.GetProtocolType())
 257   {
 258     std::string location = url.GetLocation();
 259     if( location.size() > 0u )
 260     {
 261       TextureId id = std::stoi( location );
 262       for( auto&& elem : mExternalTextures )
 263       {
 264         if( elem.textureId == id )
 265         {
 266           preMultiplyOnLoad = TextureManager::MultiplyOnLoad::LOAD_WITHOUT_MULTIPLY;
 267           textureId = elem.textureId;
 268           return elem.textureSet;
 269         }
 270       }
 271     }
 272   }
 273   else if( synchronousLoading )
 274   {
 275     PixelData data;
 276     if( url.IsValid() )
 277     {
 278       Devel::PixelBuffer pixelBuffer = LoadImageFromFile( url.GetUrl(), desiredSize, fittingMode, samplingMode,
 279                                        orientationCorrection  );
 280       if( maskInfo && maskInfo->mAlphaMaskUrl.IsValid() )
 281       {
 282         Devel::PixelBuffer maskPixelBuffer = LoadImageFromFile( maskInfo->mAlphaMaskUrl.GetUrl(), ImageDimensions(),
 283                                              FittingMode::SCALE_TO_FILL, SamplingMode::NO_FILTER, true  );
 284         if( maskPixelBuffer )
 285         {
 286           pixelBuffer.ApplyMask( maskPixelBuffer, maskInfo->mContentScaleFactor, maskInfo->mCropToMask );
 287         }
 288       }
 289       if( pixelBuffer )
 290       {
 291         PreMultiply( pixelBuffer, preMultiplyOnLoad );
 292         data = Devel::PixelBuffer::Convert(pixelBuffer); // takes ownership of buffer
 293       }
 294     }
 295     if( !data )
 296     {
 297       // use broken image
 298       Devel::PixelBuffer pixelBuffer = LoadImageFromFile( mBrokenImageUrl );
 299       if( pixelBuffer )
 300       {
 301         PreMultiply( pixelBuffer, preMultiplyOnLoad );
 302         data = Devel::PixelBuffer::Convert(pixelBuffer); // takes ownership of buffer
 303       }
 304       Texture texture = Texture::New( Dali::TextureType::TEXTURE_2D, data.GetPixelFormat(),
 305                                       data.GetWidth(), data.GetHeight() );
 306       texture.Upload( data );
 307       textureSet = TextureSet::New();
 308       textureSet.SetTexture( 0u, texture );
 309     }
 310     else
 311     {
 312       if( atlasingStatus ) // attempt atlasing
 313       {
 314         textureSet = imageAtlasManager->Add( textureRect, data );
 315       }
 316       if( !textureSet ) // big image, no atlasing or atlasing failed
 317       {
 318         atlasingStatus = false;
 319         Texture texture = Texture::New( Dali::TextureType::TEXTURE_2D, data.GetPixelFormat(),
 320                                         data.GetWidth(), data.GetHeight() );
 321         texture.Upload( data );
 322         textureSet = TextureSet::New();
 323         textureSet.SetTexture( 0u, texture );
 324       }
 325       else
 326       {
 327         textureRectSize.SetWidth(data.GetWidth());
 328         textureRectSize.SetHeight(data.GetHeight());
 329       }
 330     }
 331   }
 332   else
 333   {
 334     loadingStatus = true;
 335     if( atlasingStatus )
 336     {
 337       textureSet = imageAtlasManager->Add( textureRect, url.GetUrl(), desiredSize, fittingMode, true, atlasObserver);
 338     }
 339     if( !textureSet ) // big image, no atlasing or atlasing failed
 340     {
 341       atlasingStatus = false;
 342       if( !maskInfo || !maskInfo->mAlphaMaskUrl.IsValid() )
 343       {
 344         textureId = RequestLoad( url, desiredSize, fittingMode, samplingMode, TextureManager::NO_ATLAS,
 345                                  textureObserver, orientationCorrection, reloadPolicy, preMultiplyOnLoad );
 346       }
 347       else
 348       {
 349         maskInfo->mAlphaMaskId = RequestMaskLoad( maskInfo->mAlphaMaskUrl );
 350         textureId = RequestLoad( url,
 351                                  maskInfo->mAlphaMaskId,
 352                                  maskInfo->mContentScaleFactor,
 353                                  desiredSize,
 354                                  fittingMode, samplingMode,
 355                                  TextureManager::NO_ATLAS,
 356                                  maskInfo->mCropToMask,
 357                                  textureObserver,
 358                                  orientationCorrection,
 359                                  reloadPolicy, preMultiplyOnLoad );
 360       }
 361
 362       TextureManager::LoadState loadState = GetTextureStateInternal( textureId );
 363       if( loadState == TextureManager::LoadState::UPLOADED )
 364       {
 365         // UploadComplete has already been called - keep the same texture set
 366         textureSet = GetTextureSet( textureId );
 367       }
 368
 369       // If we are loading the texture, or waiting for the ready signal handler to complete, inform
 370       // caller that they need to wait.
 371       loadingStatus = ( loadState == TextureManager::LoadState::LOADING ||
 372                         loadState == TextureManager::LoadState::WAITING_FOR_MASK ||
 373                         loadState == TextureManager::LoadState::MASK_APPLYING ||
 374                         loadState == TextureManager::LoadState::MASK_APPLIED ||
 375                         loadState == TextureManager::LoadState::NOT_STARTED ||
 376                         mQueueLoadFlag );
 377
 378     }
 379     else
 380     {
 381       textureRectSize = desiredSize;
 382     }
 383   }
 384
 385   if( ! atlasingStatus && textureSet )
 386   {
 387     Sampler sampler = Sampler::New();
 388     sampler.SetWrapMode(  wrapModeU, wrapModeV  );
 389     textureSet.SetSampler( 0u, sampler );
 390   }
 391
 392   return textureSet;
 393 }
 394
 395 TextureManager::TextureId TextureManager::RequestLoad(
 396   const VisualUrl&                url,
 397   const ImageDimensions           desiredSize,
 398   FittingMode::Type               fittingMode,
 399   Dali::SamplingMode::Type        samplingMode,
 400   const UseAtlas                  useAtlas,
 401   TextureUploadObserver*          observer,
 402   bool                            orientationCorrection,
 403   TextureManager::ReloadPolicy    reloadPolicy,
 404   TextureManager::MultiplyOnLoad& preMultiplyOnLoad )
 405 {
 406   return RequestLoadInternal( url, INVALID_TEXTURE_ID, 1.0f, desiredSize, fittingMode, samplingMode, useAtlas,
 407                               false, StorageType::UPLOAD_TO_TEXTURE, observer, orientationCorrection, reloadPolicy,
 408                               preMultiplyOnLoad, Dali::AnimatedImageLoading(), 0u );
 409 }
 410
 411 TextureManager::TextureId TextureManager::RequestLoad(
 412   const VisualUrl&                url,
 413   TextureId                       maskTextureId,
 414   float                           contentScale,
 415   const ImageDimensions           desiredSize,
 416   FittingMode::Type               fittingMode,
 417   Dali::SamplingMode::Type        samplingMode,
 418   const UseAtlas                  useAtlas,
 419   bool                            cropToMask,
 420   TextureUploadObserver*          observer,
 421   bool                            orientationCorrection,
 422   TextureManager::ReloadPolicy    reloadPolicy,
 423   TextureManager::MultiplyOnLoad& preMultiplyOnLoad )
 424 {
 425   return RequestLoadInternal( url, maskTextureId, contentScale, desiredSize, fittingMode, samplingMode, useAtlas,
 426                               cropToMask, StorageType::UPLOAD_TO_TEXTURE, observer, orientationCorrection, reloadPolicy,
 427                               preMultiplyOnLoad, Dali::AnimatedImageLoading(), 0u );
 428 }
 429
 430 TextureManager::TextureId TextureManager::RequestMaskLoad( const VisualUrl& maskUrl )
 431 {
 432   // Use the normal load procedure to get the alpha mask.
 433   auto preMultiply = TextureManager::MultiplyOnLoad::LOAD_WITHOUT_MULTIPLY;
 434   return RequestLoadInternal( maskUrl, INVALID_TEXTURE_ID, 1.0f, ImageDimensions(), FittingMode::SCALE_TO_FILL,
 435                               SamplingMode::NO_FILTER, NO_ATLAS, false, StorageType::KEEP_PIXEL_BUFFER, NULL, true,
 436                               TextureManager::ReloadPolicy::CACHED, preMultiply, Dali::AnimatedImageLoading(), 0u );
 437 }
 438
 439 TextureManager::TextureId TextureManager::RequestLoadInternal(
 440   const VisualUrl&                url,
 441   TextureId                       maskTextureId,
 442   float                           contentScale,
 443   const ImageDimensions           desiredSize,
 444   FittingMode::Type               fittingMode,
 445   Dali::SamplingMode::Type        samplingMode,
 446   UseAtlas                        useAtlas,
 447   bool                            cropToMask,
 448   StorageType                     storageType,
 449   TextureUploadObserver*          observer,
 450   bool                            orientationCorrection,
 451   TextureManager::ReloadPolicy    reloadPolicy,
 452   TextureManager::MultiplyOnLoad& preMultiplyOnLoad,
 453   Dali::AnimatedImageLoading      animatedImageLoading,
 454   uint32_t                        frameIndex )
 455 {
 456   // First check if the requested Texture is cached.
 457   bool isAnimatedImage = ( animatedImageLoading ) ? true : false;
 458
 459   TextureHash textureHash = INITIAL_CACHE_NUMBER;
 460   int cacheIndex = INVALID_CACHE_INDEX;
 461   if(storageType != StorageType::RETURN_PIXEL_BUFFER && !isAnimatedImage)
 462   {
 463     textureHash = GenerateHash(url.GetUrl(), desiredSize, fittingMode, samplingMode, useAtlas, maskTextureId);
 464
 465     // Look up the texture by hash. Note: The extra parameters are used in case of a hash collision.
 466     cacheIndex = FindCachedTexture(textureHash, url.GetUrl(), desiredSize, fittingMode, samplingMode, useAtlas, maskTextureId, preMultiplyOnLoad);
 467   }
 468
 469   TextureManager::TextureId textureId = INVALID_TEXTURE_ID;
 470   // Check if the requested Texture exists in the cache.
 471   if( cacheIndex != INVALID_CACHE_INDEX )
 472   {
 473     if ( TextureManager::ReloadPolicy::CACHED == reloadPolicy )
 474     {
 475       // Mark this texture being used by another client resource. Forced reload would replace the current texture
 476       // without the need for incrementing the reference count.
 477       ++( mTextureInfoContainer[ cacheIndex ].referenceCount );
 478     }
 479     textureId = mTextureInfoContainer[ cacheIndex ].textureId;
 480
 481     // Update preMultiplyOnLoad value. It should be changed according to preMultiplied value of the cached info.
 482     preMultiplyOnLoad = mTextureInfoContainer[ cacheIndex ].preMultiplied ? TextureManager::MultiplyOnLoad::MULTIPLY_ON_LOAD : TextureManager::MultiplyOnLoad::LOAD_WITHOUT_MULTIPLY;
 483
 484     DALI_LOG_INFO( gTextureManagerLogFilter, Debug::General, "TextureManager::RequestLoad( url=%s observer=%p ) Using cached texture id@%d, textureId=%d\n",
 485                    url.GetUrl().c_str(), observer, cacheIndex, textureId );
 486   }
 487
 488   if( textureId == INVALID_TEXTURE_ID ) // There was no caching, or caching not required
 489   {
 490     // We need a new Texture.
 491     textureId = GenerateUniqueTextureId();
 492     bool preMultiply = ( preMultiplyOnLoad == TextureManager::MultiplyOnLoad::MULTIPLY_ON_LOAD );
 493     mTextureInfoContainer.push_back( TextureInfo( textureId, maskTextureId, url.GetUrl(),
 494                                                   desiredSize, contentScale, fittingMode, samplingMode,
 495                                                   false, cropToMask, useAtlas, textureHash, orientationCorrection,
 496                                                   preMultiply, animatedImageLoading, frameIndex ) );
 497     cacheIndex = mTextureInfoContainer.size() - 1u;
 498
 499     DALI_LOG_INFO( gTextureManagerLogFilter, Debug::General, "TextureManager::RequestLoad( url=%s observer=%p ) New texture, cacheIndex:%d, textureId=%d\n",
 500                    url.GetUrl().c_str(), observer, cacheIndex, textureId );
 501   }
 502
 503   // The below code path is common whether we are using the cache or not.
 504   // The textureInfoIndex now refers to either a pre-existing cached TextureInfo,
 505   // or a new TextureInfo just created.
 506   TextureInfo& textureInfo( mTextureInfoContainer[ cacheIndex ] );
 507   textureInfo.maskTextureId = maskTextureId;
 508   textureInfo.storageType = storageType;
 509   textureInfo.orientationCorrection = orientationCorrection;
 510
 511   DALI_LOG_INFO( gTextureManagerLogFilter, Debug::General, "TextureInfo loadState:%s\n",
 512                  GET_LOAD_STATE_STRING(textureInfo.loadState ) );
 513
 514   // Force reloading of texture by setting loadState unless already loading or cancelled.
 515   if ( TextureManager::ReloadPolicy::FORCED == reloadPolicy &&
 516        TextureManager::LoadState::LOADING != textureInfo.loadState &&
 517        TextureManager::LoadState::WAITING_FOR_MASK != textureInfo.loadState &&
 518        TextureManager::LoadState::MASK_APPLYING != textureInfo.loadState &&
 519        TextureManager::LoadState::MASK_APPLIED != textureInfo.loadState &&
 520        TextureManager::LoadState::CANCELLED != textureInfo.loadState )
 521   {
 522     DALI_LOG_INFO( gTextureManagerLogFilter, Debug::Verbose, "TextureManager::RequestLoad( url=%s observer=%p ) ForcedReload cacheIndex:%d, textureId=%d\n",
 523                    url.GetUrl().c_str(), observer, cacheIndex, textureId );
 524
 525     textureInfo.loadState = TextureManager::LoadState::NOT_STARTED;
 526   }
 527
 528   // Check if we should add the observer.
 529   // Only do this if we have not loaded yet and it will not have loaded by the end of this method.
 530   switch( textureInfo.loadState )
 531   {
 532     case TextureManager::LoadState::LOAD_FAILED: // Failed notifies observer which then stops observing.
 533     case TextureManager::LoadState::NOT_STARTED:
 534     {
 535       LoadOrQueueTexture( textureInfo, observer ); // If called inside NotifyObservers, queues until afterwards
 536       break;
 537     }
 538     case TextureManager::LoadState::LOADING:
 539     case TextureManager::LoadState::WAITING_FOR_MASK:
 540     case TextureManager::LoadState::MASK_APPLYING:
 541     case TextureManager::LoadState::MASK_APPLIED:
 542     {
 543       ObserveTexture( textureInfo, observer );
 544       break;
 545     }
 546     case TextureManager::LoadState::UPLOADED:
 547     {
 548       if( observer )
 549       {
 550         LoadOrQueueTexture( textureInfo, observer );
 551       }
 552       break;
 553     }
 554     case TextureManager::LoadState::CANCELLED:
 555     {
 556       // A cancelled texture hasn't finished loading yet. Treat as a loading texture
 557       // (it's ref count has already been incremented, above)
 558       textureInfo.loadState = TextureManager::LoadState::LOADING;
 559       ObserveTexture( textureInfo, observer );
 560       break;
 561     }
 562     case TextureManager::LoadState::LOAD_FINISHED:
 563     {
 564       // Loading has already completed.
 565       if( observer && textureInfo.storageType == StorageType::RETURN_PIXEL_BUFFER )
 566       {
 567         LoadOrQueueTexture( textureInfo, observer );
 568       }
 569       break;
 570     }
 571   }
 572
 573   // Return the TextureId for which this Texture can now be referenced by externally.
 574   return textureId;
 575 }
 576
 577 void TextureManager::Remove( const TextureManager::TextureId textureId, TextureUploadObserver* observer )
 578 {
 579   int textureInfoIndex = GetCacheIndexFromId( textureId );
 580   if( textureInfoIndex != INVALID_INDEX )
 581   {
 582     TextureInfo& textureInfo( mTextureInfoContainer[ textureInfoIndex ] );
 583
 584     DALI_LOG_INFO( gTextureManagerLogFilter, Debug::Concise,
 585                    "TextureManager::Remove(%d) url:%s\n  cacheIdx:%d loadState:%s reference count = %d\n",
 586                    textureId, textureInfo.url.GetUrl().c_str(),
 587                    textureInfoIndex, GET_LOAD_STATE_STRING( textureInfo.loadState ), textureInfo.referenceCount );
 588
 589     // Decrement the reference count and check if this is the last user of this Texture.
 590     if( --textureInfo.referenceCount <= 0 )
 591     {
 592       // This is the last remove for this Texture.
 593       textureInfo.referenceCount = 0;
 594       bool removeTextureInfo = false;
 595
 596       // If loaded, we can remove the TextureInfo and the Atlas (if atlased).
 597       if( textureInfo.loadState == LoadState::UPLOADED )
 598       {
 599         if( textureInfo.atlas )
 600         {
 601           textureInfo.atlas.Remove( textureInfo.atlasRect );
 602         }
 603         removeTextureInfo = true;
 604       }
 605       else if( textureInfo.loadState == LoadState::LOADING )
 606       {
 607         // We mark the textureInfo for removal.
 608         // Once the load has completed, this method will be called again.
 609         textureInfo.loadState = LoadState::CANCELLED;
 610       }
 611       else
 612       {
 613         // In other states, we are not waiting for a load so we are safe to remove the TextureInfo data.
 614         removeTextureInfo = true;
 615       }
 616
 617       // If the state allows us to remove the TextureInfo data, we do so.
 618       if( removeTextureInfo )
 619       {
 620         // Permanently remove the textureInfo struct.
 621         mTextureInfoContainer.erase( mTextureInfoContainer.begin() + textureInfoIndex );
 622       }
 623     }
 624
 625     if( observer )
 626     {
 627       // Remove element from the LoadQueue
 628       for( auto&& element : mLoadQueue )
 629       {
 630         if( element.mObserver == observer )
 631         {
 632           mLoadQueue.Erase( &element );
 633           break;
 634         }
 635       }
 636     }
 637   }
 638 }
 639
 640 VisualUrl TextureManager::GetVisualUrl( TextureId textureId )
 641 {
 642   VisualUrl visualUrl("");
 643   int cacheIndex = GetCacheIndexFromId( textureId );
 644
 645   if( cacheIndex != INVALID_CACHE_INDEX )
 646   {
 647     DALI_LOG_INFO( gTextureManagerLogFilter, Debug::Concise, "TextureManager::GetVisualUrl. Using cached texture id=%d, textureId=%d\n",
 648                    cacheIndex, textureId );
 649
 650     TextureInfo& cachedTextureInfo( mTextureInfoContainer[ cacheIndex ] );
 651     visualUrl = cachedTextureInfo.url;
 652   }
 653   return visualUrl;
 654 }
 655
 656 TextureManager::LoadState TextureManager::GetTextureState( TextureId textureId )
 657 {
 658   LoadState loadState = TextureManager::LoadState::NOT_STARTED;
 659
 660   int cacheIndex = GetCacheIndexFromId( textureId );
 661   if( cacheIndex != INVALID_CACHE_INDEX )
 662   {
 663     TextureInfo& cachedTextureInfo( mTextureInfoContainer[ cacheIndex ] );
 664     loadState = cachedTextureInfo.loadState;
 665   }
 666   else
 667   {
 668     for( auto&& elem : mExternalTextures )
 669     {
 670       if( elem.textureId == textureId )
 671       {
 672         loadState = LoadState::UPLOADED;
 673         break;
 674       }
 675     }
 676   }
 677   return loadState;
 678 }
 679
 680 TextureManager::LoadState TextureManager::GetTextureStateInternal( TextureId textureId )
 681 {
 682   LoadState loadState = TextureManager::LoadState::NOT_STARTED;
 683
 684   int cacheIndex = GetCacheIndexFromId( textureId );
 685   if( cacheIndex != INVALID_CACHE_INDEX )
 686   {
 687     TextureInfo& cachedTextureInfo( mTextureInfoContainer[ cacheIndex ] );
 688     loadState = cachedTextureInfo.loadState;
 689   }
 690
 691   return loadState;
 692 }
 693
 694 TextureSet TextureManager::GetTextureSet( TextureId textureId )
 695 {
 696   TextureSet textureSet;// empty handle
 697
 698   int cacheIndex = GetCacheIndexFromId( textureId );
 699   if( cacheIndex != INVALID_CACHE_INDEX )
 700   {
 701     TextureInfo& cachedTextureInfo( mTextureInfoContainer[ cacheIndex ] );
 702     textureSet = cachedTextureInfo.textureSet;
 703   }
 704   else
 705   {
 706     for( auto&& elem : mExternalTextures )
 707     {
 708       if( elem.textureId == textureId )
 709       {
 710         textureSet = elem.textureSet;
 711         break;
 712       }
 713     }
 714   }
 715   return textureSet;
 716 }
 717
 718 std::string TextureManager::AddExternalTexture( TextureSet& textureSet )
 719 {
 720   TextureManager::ExternalTextureInfo info;
 721   info.textureId = GenerateUniqueTextureId();
 722   info.textureSet = textureSet;
 723   mExternalTextures.emplace_back( info );
 724   return VisualUrl::CreateTextureUrl( std::to_string( info.textureId ) );
 725 }
 726
 727 TextureSet TextureManager::RemoveExternalTexture( const std::string& url )
 728 {
 729   if( url.size() > 0u )
 730   {
 731     // get the location from the Url
 732     VisualUrl parseUrl( url );
 733     if( VisualUrl::TEXTURE == parseUrl.GetProtocolType() )
 734     {
 735       std::string location = parseUrl.GetLocation();
 736       if( location.size() > 0u )
 737       {
 738         TextureId id = std::stoi( location );
 739         const auto end = mExternalTextures.end();
 740         for( auto iter = mExternalTextures.begin(); iter != end; ++iter )
 741         {
 742           if( iter->textureId == id )
 743           {
 744             auto textureSet = iter->textureSet;
 745             mExternalTextures.erase( iter );
 746             return textureSet;
 747           }
 748         }
 749       }
 750     }
 751   }
 752   return TextureSet();
 753 }
 754
 755 void TextureManager::AddObserver( TextureManager::LifecycleObserver& observer )
 756 {
 757   // make sure an observer doesn't observe the same object twice
 758   // otherwise it will get multiple calls to ObjectDestroyed()
 759   DALI_ASSERT_DEBUG( mLifecycleObservers.End() == std::find( mLifecycleObservers.Begin(), mLifecycleObservers.End(), &observer));
 760   mLifecycleObservers.PushBack( &observer );
 761 }
 762
 763 void TextureManager::RemoveObserver( TextureManager::LifecycleObserver& observer)
 764 {
 765   // Find the observer...
 766   auto endIter =  mLifecycleObservers.End();
 767   for( auto iter = mLifecycleObservers.Begin(); iter != endIter; ++iter)
 768   {
 769     if( (*iter) == &observer)
 770     {
 771       mLifecycleObservers.Erase( iter );
 772       break;
 773     }
 774   }
 775   DALI_ASSERT_DEBUG(endIter != mLifecycleObservers.End());
 776 }
 777
 778 void TextureManager::LoadOrQueueTexture( TextureInfo& textureInfo, TextureUploadObserver* observer )
 779 {
 780   switch( textureInfo.loadState )
 781   {
 782     case LoadState::NOT_STARTED:
 783     case LoadState::LOAD_FAILED:
 784     {
 785       if( mQueueLoadFlag )
 786       {
 787         QueueLoadTexture( textureInfo, observer );
 788       }
 789       else
 790       {
 791         LoadTexture( textureInfo, observer );
 792       }
 793       break;
 794     }
 795     case LoadState::UPLOADED:
 796     {
 797       if( mQueueLoadFlag )
 798       {
 799         QueueLoadTexture( textureInfo, observer );
 800       }
 801       else
 802       {
 803         // The Texture has already loaded. The other observers have already been notified.
 804         // We need to send a "late" loaded notification for this observer.
 805         observer->UploadComplete( true, textureInfo.textureId, textureInfo.textureSet,
 806                                   textureInfo.useAtlas, textureInfo.atlasRect,
 807                                   textureInfo.preMultiplied );
 808       }
 809       break;
 810     }
 811     case LoadState::LOADING:
 812     case LoadState::CANCELLED:
 813     case LoadState::LOAD_FINISHED:
 814     case LoadState::WAITING_FOR_MASK:
 815     case LoadState::MASK_APPLYING:
 816     case LoadState::MASK_APPLIED:
 817     {
 818       break;
 819     }
 820   }
 821 }
 822
 823 void TextureManager::QueueLoadTexture( TextureInfo& textureInfo, TextureUploadObserver* observer )
 824 {
 825   auto textureId = textureInfo.textureId;
 826   mLoadQueue.PushBack( LoadQueueElement( textureId, observer) );
 827
 828   observer->DestructionSignal().Connect( this, &TextureManager::ObserverDestroyed );
 829 }
 830
 831 void TextureManager::LoadTexture( TextureInfo& textureInfo, TextureUploadObserver* observer )
 832 {
 833   DALI_LOG_INFO( gTextureManagerLogFilter, Debug::Concise, "TextureManager::LoadTexture(): url:%s sync:%s\n",
 834                  textureInfo.url.GetUrl().c_str(), textureInfo.loadSynchronously?"T":"F" );
 835
 836   textureInfo.loadState = LoadState::LOADING;
 837   if( !textureInfo.loadSynchronously )
 838   {
 839     auto& loadersContainer = textureInfo.url.IsLocalResource() ? mAsyncLocalLoaders : mAsyncRemoteLoaders;
 840     auto loadingHelperIt = loadersContainer.GetNext();
 841     auto premultiplyOnLoad = ( textureInfo.preMultiplyOnLoad && textureInfo.maskTextureId == INVALID_TEXTURE_ID ) ?
 842                                DevelAsyncImageLoader::PreMultiplyOnLoad::ON : DevelAsyncImageLoader::PreMultiplyOnLoad::OFF;
 843     DALI_ASSERT_ALWAYS(loadingHelperIt != loadersContainer.End());
 844     if( textureInfo.animatedImageLoading )
 845     {
 846       loadingHelperIt->LoadAnimatedImage( textureInfo.textureId, textureInfo.animatedImageLoading, textureInfo.frameIndex );
 847     }
 848     else
 849     {
 850       loadingHelperIt->Load(textureInfo.textureId, textureInfo.url,
 851                             textureInfo.desiredSize, textureInfo.fittingMode,
 852                             textureInfo.samplingMode, textureInfo.orientationCorrection,
 853                             premultiplyOnLoad );
 854     }
 855   }
 856   ObserveTexture( textureInfo, observer );
 857 }
 858
 859 void TextureManager::ProcessQueuedTextures()
 860 {
 861   for( auto&& element : mLoadQueue )
 862   {
 863     if( !element.mObserver )
 864     {
 865       continue;
 866     }
 867
 868     int cacheIndex = GetCacheIndexFromId( element.mTextureId );
 869     if( cacheIndex != INVALID_CACHE_INDEX )
 870     {
 871       TextureInfo& textureInfo( mTextureInfoContainer[cacheIndex] );
 872       if( textureInfo.loadState == LoadState::UPLOADED )
 873       {
 874         element.mObserver->UploadComplete( true, textureInfo.textureId, textureInfo.textureSet,
 875                                            textureInfo.useAtlas, textureInfo.atlasRect,
 876                                            textureInfo.preMultiplied );
 877       }
 878       else if ( textureInfo.loadState == LoadState::LOAD_FINISHED && textureInfo.storageType == StorageType::RETURN_PIXEL_BUFFER )
 879       {
 880         element.mObserver->LoadComplete( true, textureInfo.pixelBuffer, textureInfo.url, textureInfo.preMultiplied );
 881       }
 882       else
 883       {
 884         LoadTexture( textureInfo, element.mObserver );
 885       }
 886     }
 887   }
 888   mLoadQueue.Clear();
 889 }
 890
 891 void TextureManager::ObserveTexture( TextureInfo& textureInfo,
 892                                      TextureUploadObserver* observer )
 893 {
 894   DALI_LOG_INFO( gTextureManagerLogFilter, Debug::Concise, "TextureManager::ObserveTexture(): url:%s observer:%p\n",
 895                  textureInfo.url.GetUrl().c_str(), observer );
 896
 897   if( observer )
 898   {
 899     textureInfo.observerList.PushBack( observer );
 900     observer->DestructionSignal().Connect( this, &TextureManager::ObserverDestroyed );
 901   }
 902 }
 903
 904 void TextureManager::AsyncLoadComplete( AsyncLoadingInfoContainerType& loadingContainer, uint32_t id,
 905                                         Devel::PixelBuffer pixelBuffer )
 906 {
 907   DALI_LOG_INFO( gTextureManagerLogFilter, Debug::Concise, "TextureManager::AsyncLoadComplete( id:%d )\n", id );
 908
 909   if( loadingContainer.size() >= 1u )
 910   {
 911     AsyncLoadingInfo loadingInfo = loadingContainer.front();
 912
 913     if( loadingInfo.loadId == id )
 914     {
 915       int cacheIndex = GetCacheIndexFromId( loadingInfo.textureId );
 916       if( cacheIndex != INVALID_CACHE_INDEX )
 917       {
 918         TextureInfo& textureInfo( mTextureInfoContainer[cacheIndex] );
 919
 920         DALI_LOG_INFO( gTextureManagerLogFilter, Debug::Concise,
 921                        "  textureId:%d Url:%s CacheIndex:%d LoadState: %d\n",
 922                        textureInfo.textureId, textureInfo.url.GetUrl().c_str(), cacheIndex, textureInfo.loadState );
 923
 924         if( textureInfo.loadState != LoadState::CANCELLED )
 925         {
 926           // textureInfo can be invalidated after this call (as the mTextureInfoContainer may be modified)
 927           PostLoad( textureInfo, pixelBuffer );
 928         }
 929         else
 930         {
 931           Remove( textureInfo.textureId, nullptr );
 932         }
 933       }
 934     }
 935
 936     loadingContainer.pop_front();
 937   }
 938 }
 939
 940 void TextureManager::PostLoad( TextureInfo& textureInfo, Devel::PixelBuffer& pixelBuffer )
 941 {
 942   // Was the load successful?
 943   if( pixelBuffer && ( pixelBuffer.GetWidth() != 0 ) && ( pixelBuffer.GetHeight() != 0 ) )
 944   {
 945     // No atlas support for now
 946     textureInfo.useAtlas = NO_ATLAS;
 947     textureInfo.preMultiplied = pixelBuffer.IsAlphaPreMultiplied();
 948
 949     if( textureInfo.storageType == StorageType::UPLOAD_TO_TEXTURE )
 950     {
 951       // If there is a mask texture ID associated with this texture, then apply the mask
 952       // if it's already loaded. If it hasn't, and the mask is still loading,
 953       // wait for the mask to finish loading.
 954       if( textureInfo.maskTextureId != INVALID_TEXTURE_ID )
 955       {
 956         if( textureInfo.loadState == LoadState::MASK_APPLYING )
 957         {
 958           textureInfo.loadState = LoadState::MASK_APPLIED;
 959           UploadTexture( pixelBuffer, textureInfo );
 960           NotifyObservers( textureInfo, true );
 961         }
 962         else
 963         {
 964           LoadState maskLoadState = GetTextureStateInternal( textureInfo.maskTextureId );
 965           textureInfo.pixelBuffer = pixelBuffer; // Store the pixel buffer temporarily
 966           if( maskLoadState == LoadState::LOADING )
 967           {
 968             textureInfo.loadState = LoadState::WAITING_FOR_MASK;
 969           }
 970           else if( maskLoadState == LoadState::LOAD_FINISHED )
 971           {
 972             // Send New Task to Thread
 973             ApplyMask( textureInfo, textureInfo.maskTextureId );
 974           }
 975         }
 976       }
 977       else
 978       {
 979         UploadTexture( pixelBuffer, textureInfo );
 980         NotifyObservers( textureInfo, true );
 981       }
 982     }
 983     else
 984     {
 985       textureInfo.pixelBuffer = pixelBuffer; // Store the pixel data
 986       textureInfo.loadState = LoadState::LOAD_FINISHED;
 987
 988       if( textureInfo.storageType == StorageType::RETURN_PIXEL_BUFFER )
 989       {
 990         NotifyObservers( textureInfo, true );
 991       }
 992       else
 993       {
 994         // Check if there was another texture waiting for this load to complete
 995         // (e.g. if this was an image mask, and its load is on a different thread)
 996         CheckForWaitingTexture( textureInfo );
 997       }
 998     }
 999   }
1000   else
1001   {
1002     // @todo If the load was unsuccessful, upload the broken image.
1003     textureInfo.loadState = LoadState::LOAD_FAILED;
1004     CheckForWaitingTexture( textureInfo );
1005     NotifyObservers( textureInfo, false );
1006   }
1007 }
1008
1009 void TextureManager::CheckForWaitingTexture( TextureInfo& maskTextureInfo )
1010 {
1011   // Search the cache, checking if any texture has this texture id as a
1012   // maskTextureId:
1013   const unsigned int size = mTextureInfoContainer.size();
1014
1015   for( unsigned int cacheIndex = 0; cacheIndex < size; ++cacheIndex )
1016   {
1017     if( mTextureInfoContainer[cacheIndex].maskTextureId == maskTextureInfo.textureId &&
1018         mTextureInfoContainer[cacheIndex].loadState == LoadState::WAITING_FOR_MASK )
1019     {
1020       TextureInfo& textureInfo( mTextureInfoContainer[cacheIndex] );
1021
1022       if( maskTextureInfo.loadState == LoadState::LOAD_FINISHED )
1023       {
1024         // Send New Task to Thread
1025         ApplyMask( textureInfo, maskTextureInfo.textureId );
1026       }
1027       else
1028       {
1029         textureInfo.pixelBuffer.Reset();
1030         textureInfo.loadState = LoadState::LOAD_FAILED;
1031         NotifyObservers( textureInfo, false );
1032       }
1033     }
1034   }
1035 }
1036
1037 void TextureManager::ApplyMask( TextureInfo& textureInfo, TextureId maskTextureId )
1038 {
1039   int maskCacheIndex = GetCacheIndexFromId( maskTextureId );
1040   if( maskCacheIndex != INVALID_CACHE_INDEX )
1041   {
1042     Devel::PixelBuffer maskPixelBuffer = mTextureInfoContainer[maskCacheIndex].pixelBuffer;
1043     Devel::PixelBuffer pixelBuffer = textureInfo.pixelBuffer;
1044     textureInfo.pixelBuffer.Reset();
1045
1046     DALI_LOG_INFO( gTextureManagerLogFilter, Debug::Concise, "TextureManager::ApplyMask(): url:%s sync:%s\n",
1047                    textureInfo.url.GetUrl().c_str(), textureInfo.loadSynchronously?"T":"F" );
1048
1049     textureInfo.loadState = LoadState::MASK_APPLYING;
1050     auto& loadersContainer = textureInfo.url.IsLocalResource() ? mAsyncLocalLoaders : mAsyncRemoteLoaders;
1051     auto loadingHelperIt = loadersContainer.GetNext();
1052     auto premultiplyOnLoad = textureInfo.preMultiplyOnLoad ? DevelAsyncImageLoader::PreMultiplyOnLoad::ON : DevelAsyncImageLoader::PreMultiplyOnLoad::OFF;
1053     DALI_ASSERT_ALWAYS(loadingHelperIt != loadersContainer.End());
1054     loadingHelperIt->ApplyMask( textureInfo.textureId, pixelBuffer, maskPixelBuffer, textureInfo.scaleFactor, textureInfo.cropToMask, premultiplyOnLoad );
1055   }
1056 }
1057
1058 void TextureManager::UploadTexture( Devel::PixelBuffer& pixelBuffer, TextureInfo& textureInfo )
1059 {
1060   if( textureInfo.useAtlas != USE_ATLAS )
1061   {
1062     DALI_LOG_INFO( gTextureManagerLogFilter, Debug::General, "  TextureManager::UploadTexture() New Texture for textureId:%d\n", textureInfo.textureId );
1063
1064     // Check if this pixelBuffer is premultiplied
1065     textureInfo.preMultiplied = pixelBuffer.IsAlphaPreMultiplied();
1066
1067     auto& renderingAddOn = RenderingAddOn::Get();
1068     if( renderingAddOn.IsValid() )
1069     {
1070       renderingAddOn.CreateGeometry( textureInfo.textureId, pixelBuffer );
1071     }
1072
1073     Texture texture = Texture::New( Dali::TextureType::TEXTURE_2D, pixelBuffer.GetPixelFormat(),
1074                                     pixelBuffer.GetWidth(), pixelBuffer.GetHeight() );
1075
1076     PixelData pixelData = Devel::PixelBuffer::Convert( pixelBuffer );
1077     texture.Upload( pixelData );
1078     if ( ! textureInfo.textureSet )
1079     {
1080       textureInfo.textureSet = TextureSet::New();
1081     }
1082     textureInfo.textureSet.SetTexture( 0u, texture );
1083   }
1084
1085   // Update the load state.
1086   // Note: This is regardless of success as we care about whether a
1087   // load attempt is in progress or not.  If unsuccessful, a broken
1088   // image is still loaded.
1089   textureInfo.loadState = LoadState::UPLOADED;
1090 }
1091
1092 void TextureManager::NotifyObservers( TextureInfo& textureInfo, bool success )
1093 {
1094   TextureId textureId = textureInfo.textureId;
1095
1096   // If there is an observer: Notify the load is complete, whether successful or not,
1097   // and erase it from the list
1098   TextureInfo* info = &textureInfo;
1099
1100   mQueueLoadFlag = true;
1101
1102   while( info->observerList.Count() )
1103   {
1104     TextureUploadObserver* observer = info->observerList[0];
1105
1106     // During UploadComplete() a Control ResourceReady() signal is emitted.
1107     // During that signal the app may add remove /add Textures (e.g. via
1108     // ImageViews).
1109     // It is possible for observers to be removed from the observer list,
1110     // and it is also possible for the mTextureInfoContainer to be modified,
1111     // invalidating the reference to the textureInfo struct.
1112     // Texture load requests for the same URL are deferred until the end of this
1113     // method.
1114     DALI_LOG_INFO( gTextureManagerLogFilter, Debug::Concise, "NotifyObservers() url:%s loadState:%s\n",
1115                    textureInfo.url.GetUrl().c_str(), GET_LOAD_STATE_STRING(textureInfo.loadState ) );
1116
1117     // It is possible for the observer to be deleted.
1118     // Disconnect and remove the observer first.
1119     observer->DestructionSignal().Disconnect( this, &TextureManager::ObserverDestroyed );
1120
1121     info->observerList.Erase( info->observerList.begin() );
1122
1123     if( info->storageType == StorageType::RETURN_PIXEL_BUFFER )
1124     {
1125       observer->LoadComplete( success, info->pixelBuffer, info->url, info->preMultiplied );
1126     }
1127     else
1128     {
1129       observer->UploadComplete( success, info->textureId, info->textureSet, info->useAtlas, info->atlasRect,
1130                                 info->preMultiplied );
1131     }
1132
1133     // Get the textureInfo from the container again as it may have been invalidated.
1134     int textureInfoIndex = GetCacheIndexFromId( textureId );
1135     if( textureInfoIndex == INVALID_CACHE_INDEX)
1136     {
1137       break; // texture has been removed - can stop.
1138     }
1139     info = &mTextureInfoContainer[ textureInfoIndex ];
1140   }
1141
1142   mQueueLoadFlag = false;
1143   ProcessQueuedTextures();
1144
1145   if( info->storageType == StorageType::RETURN_PIXEL_BUFFER && info->observerList.Count() == 0 )
1146   {
1147     Remove( info->textureId, nullptr );
1148   }
1149 }
1150
1151 TextureManager::TextureId TextureManager::GenerateUniqueTextureId()
1152 {
1153   return mCurrentTextureId++;
1154 }
1155
1156 int TextureManager::GetCacheIndexFromId( const TextureId textureId )
1157 {
1158   const unsigned int size = mTextureInfoContainer.size();
1159
1160   for( unsigned int i = 0; i < size; ++i )
1161   {
1162     if( mTextureInfoContainer[i].textureId == textureId )
1163     {
1164       return i;
1165     }
1166   }
1167
1168   return INVALID_CACHE_INDEX;
1169 }
1170
1171 TextureManager::TextureHash TextureManager::GenerateHash(
1172   const std::string&             url,
1173   const ImageDimensions          size,
1174   const FittingMode::Type        fittingMode,
1175   const Dali::SamplingMode::Type samplingMode,
1176   const UseAtlas                 useAtlas,
1177   TextureId                      maskTextureId)
1178 {
1179   std::string hashTarget( url );
1180   const size_t urlLength = hashTarget.length();
1181   const uint16_t width = size.GetWidth();
1182   const uint16_t height = size.GetWidth();
1183
1184   // If either the width or height has been specified, include the resizing options in the hash
1185   if( width != 0 || height != 0 )
1186   {
1187     // We are appending 5 bytes to the URL to form the hash input.
1188     hashTarget.resize( urlLength + 5u );
1189     char* hashTargetPtr = &( hashTarget[ urlLength ] );
1190
1191     // Pack the width and height (4 bytes total).
1192     *hashTargetPtr++ = size.GetWidth() & 0xff;
1193     *hashTargetPtr++ = ( size.GetWidth() >> 8u ) & 0xff;
1194     *hashTargetPtr++ = size.GetHeight() & 0xff;
1195     *hashTargetPtr++ = ( size.GetHeight() >> 8u ) & 0xff;
1196
1197     // Bit-pack the FittingMode, SamplingMode and atlasing.
1198     // FittingMode=2bits, SamplingMode=3bits, useAtlas=1bit
1199     *hashTargetPtr   = ( fittingMode << 4u ) | ( samplingMode << 1 ) | useAtlas;
1200   }
1201   else
1202   {
1203     // We are not including sizing information, but we still need an extra byte for atlasing.
1204     hashTarget.resize( urlLength + 1u );
1205
1206     // Add the atlasing to the hash input.
1207     switch( useAtlas )
1208     {
1209       case UseAtlas::NO_ATLAS:
1210       {
1211         hashTarget[ urlLength ] = 'f';
1212         break;
1213       }
1214       case UseAtlas::USE_ATLAS:
1215       {
1216         hashTarget[ urlLength ] = 't';
1217         break;
1218       }
1219     }
1220   }
1221
1222   if( maskTextureId != INVALID_TEXTURE_ID )
1223   {
1224     auto textureIdIndex = hashTarget.length();
1225     hashTarget.resize( hashTarget.length() + sizeof( TextureId ) );
1226     unsigned char* hashTargetPtr = reinterpret_cast<unsigned char*>(&( hashTarget[ textureIdIndex ] ));
1227
1228     // Append the texture id to the end of the URL byte by byte:
1229     // (to avoid SIGBUS / alignment issues)
1230     for( size_t byteIter = 0; byteIter < sizeof( TextureId ); ++byteIter )
1231     {
1232       *hashTargetPtr++ = maskTextureId & 0xff;
1233       maskTextureId >>= 8u;
1234     }
1235   }
1236
1237   return Dali::CalculateHash( hashTarget );
1238 }
1239
1240 int TextureManager::FindCachedTexture(
1241   const TextureManager::TextureHash hash,
1242   const std::string&                url,
1243   const ImageDimensions             size,
1244   const FittingMode::Type           fittingMode,
1245   const Dali::SamplingMode::Type    samplingMode,
1246   const bool                        useAtlas,
1247   TextureId                         maskTextureId,
1248   TextureManager::MultiplyOnLoad    preMultiplyOnLoad)
1249 {
1250   // Default to an invalid ID, in case we do not find a match.
1251   int cacheIndex = INVALID_CACHE_INDEX;
1252
1253   // Iterate through our hashes to find a match.
1254   const unsigned int count = mTextureInfoContainer.size();
1255   for( unsigned int i = 0u; i < count; ++i )
1256   {
1257     if( mTextureInfoContainer[i].hash == hash )
1258     {
1259       // We have a match, now we check all the original parameters in case of a hash collision.
1260       TextureInfo& textureInfo( mTextureInfoContainer[i] );
1261
1262       if( ( url == textureInfo.url.GetUrl() ) &&
1263           ( useAtlas == textureInfo.useAtlas ) &&
1264           ( maskTextureId == textureInfo.maskTextureId ) &&
1265           ( size == textureInfo.desiredSize ) &&
1266           ( ( size.GetWidth() == 0 && size.GetHeight() == 0 ) ||
1267             ( fittingMode == textureInfo.fittingMode &&
1268               samplingMode == textureInfo.samplingMode ) ) )
1269       {
1270         // 1. If preMultiplyOnLoad is MULTIPLY_ON_LOAD, then textureInfo.preMultiplyOnLoad should be true. The premultiplication result can be different.
1271         // 2. If preMultiplyOnLoad is LOAD_WITHOUT_MULTIPLY, then textureInfo.preMultiplied should be false.
1272         if( ( preMultiplyOnLoad == TextureManager::MultiplyOnLoad::MULTIPLY_ON_LOAD && textureInfo.preMultiplyOnLoad )
1273             || ( preMultiplyOnLoad == TextureManager::MultiplyOnLoad::LOAD_WITHOUT_MULTIPLY && !textureInfo.preMultiplied ) )
1274         {
1275           // The found Texture is a match.
1276           cacheIndex = i;
1277           break;
1278         }
1279       }
1280     }
1281   }
1282
1283   return cacheIndex;
1284 }
1285
1286 void TextureManager::ObserverDestroyed( TextureUploadObserver* observer )
1287 {
1288   const unsigned int count = mTextureInfoContainer.size();
1289   for( unsigned int i = 0; i < count; ++i )
1290   {
1291     TextureInfo& textureInfo( mTextureInfoContainer[i] );
1292     for( TextureInfo::ObserverListType::Iterator j = textureInfo.observerList.Begin();
1293          j != textureInfo.observerList.End(); )
1294     {
1295       if( *j == observer )
1296       {
1297         j = textureInfo.observerList.Erase( j );
1298       }
1299       else
1300       {
1301         ++j;
1302       }
1303     }
1304   }
1305
1306   // Remove element from the LoadQueue
1307   for( auto&& element : mLoadQueue )
1308   {
1309     if( element.mObserver == observer )
1310     {
1311       element.mObserver = nullptr;
1312     }
1313   }
1314 }
1315
1316
1317 TextureManager::AsyncLoadingHelper::AsyncLoadingHelper(TextureManager& textureManager)
1318 : AsyncLoadingHelper(Toolkit::AsyncImageLoader::New(), textureManager,
1319                      AsyncLoadingInfoContainerType())
1320 {
1321 }
1322
1323 void TextureManager::AsyncLoadingHelper::LoadAnimatedImage( TextureId                   textureId,
1324                                                             Dali::AnimatedImageLoading  animatedImageLoading,
1325                                                             uint32_t                    frameIndex )
1326 {
1327   mLoadingInfoContainer.push_back( AsyncLoadingInfo( textureId ) );
1328   auto id = DevelAsyncImageLoader::LoadAnimatedImage( mLoader, animatedImageLoading, frameIndex );
1329   mLoadingInfoContainer.back().loadId = id;
1330 }
1331
1332 void TextureManager::AsyncLoadingHelper::Load( TextureId                                textureId,
1333                                                const VisualUrl&                         url,
1334                                                ImageDimensions                          desiredSize,
1335                                                FittingMode::Type                        fittingMode,
1336                                                SamplingMode::Type                       samplingMode,
1337                                                bool                                     orientationCorrection,
1338                                                DevelAsyncImageLoader::PreMultiplyOnLoad preMultiplyOnLoad )
1339 {
1340   mLoadingInfoContainer.push_back( AsyncLoadingInfo( textureId ) );
1341   auto id = DevelAsyncImageLoader::Load( mLoader, url.GetUrl(), desiredSize, fittingMode, samplingMode, orientationCorrection, preMultiplyOnLoad );
1342   mLoadingInfoContainer.back().loadId = id;
1343 }
1344
1345 void TextureManager::AsyncLoadingHelper::ApplyMask( TextureId                                textureId,
1346                                                     Devel::PixelBuffer                       pixelBuffer,
1347                                                     Devel::PixelBuffer                       maskPixelBuffer,
1348                                                     float                                    contentScale,
1349                                                     bool                                     cropToMask,
1350                                                     DevelAsyncImageLoader::PreMultiplyOnLoad preMultiplyOnLoad )
1351 {
1352   mLoadingInfoContainer.push_back( AsyncLoadingInfo( textureId ) );
1353   auto id = DevelAsyncImageLoader::ApplyMask( mLoader, pixelBuffer, maskPixelBuffer, contentScale, cropToMask, preMultiplyOnLoad );
1354   mLoadingInfoContainer.back().loadId = id;
1355 }
1356
1357 TextureManager::AsyncLoadingHelper::AsyncLoadingHelper(AsyncLoadingHelper&& rhs)
1358 : AsyncLoadingHelper(rhs.mLoader, rhs.mTextureManager, std::move(rhs.mLoadingInfoContainer))
1359 {
1360 }
1361
1362 TextureManager::AsyncLoadingHelper::AsyncLoadingHelper(
1363     Toolkit::AsyncImageLoader loader,
1364     TextureManager& textureManager,
1365     AsyncLoadingInfoContainerType&& loadingInfoContainer)
1366 : mLoader(loader),
1367   mTextureManager(textureManager),
1368   mLoadingInfoContainer(std::move(loadingInfoContainer))
1369 {
1370   DevelAsyncImageLoader::PixelBufferLoadedSignal(mLoader).Connect(
1371       this, &AsyncLoadingHelper::AsyncLoadComplete);
1372 }
1373
1374 void TextureManager::AsyncLoadingHelper::AsyncLoadComplete(uint32_t           id,
1375                                                            Devel::PixelBuffer pixelBuffer )
1376 {
1377   mTextureManager.AsyncLoadComplete( mLoadingInfoContainer, id, pixelBuffer );
1378 }
1379
1380 void TextureManager::SetBrokenImageUrl(const std::string& brokenImageUrl)
1381 {
1382   mBrokenImageUrl = brokenImageUrl;
1383 }
1384
1385 const std::string TextureManager::GetBrokenImageUrl()
1386 {
1387   return mBrokenImageUrl;
1388 }
1389
1390 Geometry TextureManager::GetRenderGeometry(TextureId textureId, uint32_t& frontElements, uint32_t& backElements )
1391 {
1392   return RenderingAddOn::Get().IsValid() ?
1393          RenderingAddOn::Get().GetGeometry( textureId, frontElements, backElements) :
1394          Geometry();
1395 }
1396
1397 } // namespace Internal
1398
1399 } // namespace Toolkit
1400
1401 } // namespace Dali