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)
 462   {
 463     textureHash = GenerateHash(url.GetUrl(), desiredSize, fittingMode, samplingMode, useAtlas, maskTextureId, isAnimatedImage, frameIndex);
 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, isAnimatedImage, frameIndex);
 467   }
 468
 469   TextureManager::TextureId textureId = INVALID_TEXTURE_ID;
 470
 471   // Check if the requested Texture exists in the cache.
 472   if( cacheIndex != INVALID_CACHE_INDEX )
 473   {
 474     if ( TextureManager::ReloadPolicy::CACHED == reloadPolicy )
 475     {
 476       // Mark this texture being used by another client resource. Forced reload would replace the current texture
 477       // without the need for incrementing the reference count.
 478       ++( mTextureInfoContainer[ cacheIndex ].referenceCount );
 479     }
 480     textureId = mTextureInfoContainer[ cacheIndex ].textureId;
 481
 482     // Update preMultiplyOnLoad value. It should be changed according to preMultiplied value of the cached info.
 483     preMultiplyOnLoad = mTextureInfoContainer[ cacheIndex ].preMultiplied ? TextureManager::MultiplyOnLoad::MULTIPLY_ON_LOAD : TextureManager::MultiplyOnLoad::LOAD_WITHOUT_MULTIPLY;
 484
 485     DALI_LOG_INFO( gTextureManagerLogFilter, Debug::General, "TextureManager::RequestLoad( url=%s observer=%p ) Using cached texture id@%d, textureId=%d\n",
 486                    url.GetUrl().c_str(), observer, cacheIndex, textureId );
 487   }
 488
 489   if( textureId == INVALID_TEXTURE_ID ) // There was no caching, or caching not required
 490   {
 491     // We need a new Texture.
 492     textureId = GenerateUniqueTextureId();
 493     bool preMultiply = ( preMultiplyOnLoad == TextureManager::MultiplyOnLoad::MULTIPLY_ON_LOAD );
 494     mTextureInfoContainer.push_back( TextureInfo( textureId, maskTextureId, url.GetUrl(),
 495                                                   desiredSize, contentScale, fittingMode, samplingMode,
 496                                                   false, cropToMask, useAtlas, textureHash, orientationCorrection,
 497                                                   preMultiply, animatedImageLoading, frameIndex ) );
 498     cacheIndex = mTextureInfoContainer.size() - 1u;
 499
 500     DALI_LOG_INFO( gTextureManagerLogFilter, Debug::General, "TextureManager::RequestLoad( url=%s observer=%p ) New texture, cacheIndex:%d, textureId=%d\n",
 501                    url.GetUrl().c_str(), observer, cacheIndex, textureId );
 502   }
 503
 504   // The below code path is common whether we are using the cache or not.
 505   // The textureInfoIndex now refers to either a pre-existing cached TextureInfo,
 506   // or a new TextureInfo just created.
 507   TextureInfo& textureInfo( mTextureInfoContainer[ cacheIndex ] );
 508   textureInfo.maskTextureId = maskTextureId;
 509   textureInfo.storageType = storageType;
 510   textureInfo.orientationCorrection = orientationCorrection;
 511
 512   DALI_LOG_INFO( gTextureManagerLogFilter, Debug::General, "TextureInfo loadState:%s\n",
 513                  GET_LOAD_STATE_STRING(textureInfo.loadState ) );
 514
 515   // Force reloading of texture by setting loadState unless already loading or cancelled.
 516   if ( TextureManager::ReloadPolicy::FORCED == reloadPolicy &&
 517        TextureManager::LoadState::LOADING != textureInfo.loadState &&
 518        TextureManager::LoadState::WAITING_FOR_MASK != textureInfo.loadState &&
 519        TextureManager::LoadState::MASK_APPLYING != textureInfo.loadState &&
 520        TextureManager::LoadState::MASK_APPLIED != textureInfo.loadState &&
 521        TextureManager::LoadState::CANCELLED != textureInfo.loadState )
 522   {
 523     DALI_LOG_INFO( gTextureManagerLogFilter, Debug::Verbose, "TextureManager::RequestLoad( url=%s observer=%p ) ForcedReload cacheIndex:%d, textureId=%d\n",
 524                    url.GetUrl().c_str(), observer, cacheIndex, textureId );
 525
 526     textureInfo.loadState = TextureManager::LoadState::NOT_STARTED;
 527   }
 528
 529   // Check if we should add the observer.
 530   // Only do this if we have not loaded yet and it will not have loaded by the end of this method.
 531   switch( textureInfo.loadState )
 532   {
 533     case TextureManager::LoadState::LOAD_FAILED: // Failed notifies observer which then stops observing.
 534     case TextureManager::LoadState::NOT_STARTED:
 535     {
 536       LoadOrQueueTexture( textureInfo, observer ); // If called inside NotifyObservers, queues until afterwards
 537       break;
 538     }
 539     case TextureManager::LoadState::LOADING:
 540     case TextureManager::LoadState::WAITING_FOR_MASK:
 541     case TextureManager::LoadState::MASK_APPLYING:
 542     case TextureManager::LoadState::MASK_APPLIED:
 543     {
 544       ObserveTexture( textureInfo, observer );
 545       break;
 546     }
 547     case TextureManager::LoadState::UPLOADED:
 548     {
 549       if( observer )
 550       {
 551         LoadOrQueueTexture( textureInfo, observer );
 552       }
 553       break;
 554     }
 555     case TextureManager::LoadState::CANCELLED:
 556     {
 557       // A cancelled texture hasn't finished loading yet. Treat as a loading texture
 558       // (it's ref count has already been incremented, above)
 559       textureInfo.loadState = TextureManager::LoadState::LOADING;
 560       ObserveTexture( textureInfo, observer );
 561       break;
 562     }
 563     case TextureManager::LoadState::LOAD_FINISHED:
 564     {
 565       // Loading has already completed.
 566       if( observer && textureInfo.storageType == StorageType::RETURN_PIXEL_BUFFER )
 567       {
 568         LoadOrQueueTexture( textureInfo, observer );
 569       }
 570       break;
 571     }
 572   }
 573
 574   // Return the TextureId for which this Texture can now be referenced by externally.
 575   return textureId;
 576 }
 577
 578 void TextureManager::Remove( const TextureManager::TextureId textureId, TextureUploadObserver* observer )
 579 {
 580   int textureInfoIndex = GetCacheIndexFromId( textureId );
 581   if( textureInfoIndex != INVALID_INDEX )
 582   {
 583     TextureInfo& textureInfo( mTextureInfoContainer[ textureInfoIndex ] );
 584
 585     DALI_LOG_INFO( gTextureManagerLogFilter, Debug::Concise,
 586                    "TextureManager::Remove(%d) url:%s\n  cacheIdx:%d loadState:%s reference count = %d\n",
 587                    textureId, textureInfo.url.GetUrl().c_str(),
 588                    textureInfoIndex, GET_LOAD_STATE_STRING( textureInfo.loadState ), textureInfo.referenceCount );
 589
 590     // Decrement the reference count and check if this is the last user of this Texture.
 591     if( --textureInfo.referenceCount <= 0 )
 592     {
 593       // This is the last remove for this Texture.
 594       textureInfo.referenceCount = 0;
 595       bool removeTextureInfo = false;
 596
 597       // If loaded, we can remove the TextureInfo and the Atlas (if atlased).
 598       if( textureInfo.loadState == LoadState::UPLOADED )
 599       {
 600         if( textureInfo.atlas )
 601         {
 602           textureInfo.atlas.Remove( textureInfo.atlasRect );
 603         }
 604         removeTextureInfo = true;
 605       }
 606       else if( textureInfo.loadState == LoadState::LOADING )
 607       {
 608         // We mark the textureInfo for removal.
 609         // Once the load has completed, this method will be called again.
 610         textureInfo.loadState = LoadState::CANCELLED;
 611       }
 612       else
 613       {
 614         // In other states, we are not waiting for a load so we are safe to remove the TextureInfo data.
 615         removeTextureInfo = true;
 616       }
 617
 618       // If the state allows us to remove the TextureInfo data, we do so.
 619       if( removeTextureInfo )
 620       {
 621         // Permanently remove the textureInfo struct.
 622         mTextureInfoContainer.erase( mTextureInfoContainer.begin() + textureInfoIndex );
 623       }
 624     }
 625
 626     if( observer )
 627     {
 628       // Remove element from the LoadQueue
 629       for( auto&& element : mLoadQueue )
 630       {
 631         if( element.mObserver == observer )
 632         {
 633           mLoadQueue.Erase( &element );
 634           break;
 635         }
 636       }
 637     }
 638   }
 639 }
 640
 641 VisualUrl TextureManager::GetVisualUrl( TextureId textureId )
 642 {
 643   VisualUrl visualUrl("");
 644   int cacheIndex = GetCacheIndexFromId( textureId );
 645
 646   if( cacheIndex != INVALID_CACHE_INDEX )
 647   {
 648     DALI_LOG_INFO( gTextureManagerLogFilter, Debug::Concise, "TextureManager::GetVisualUrl. Using cached texture id=%d, textureId=%d\n",
 649                    cacheIndex, textureId );
 650
 651     TextureInfo& cachedTextureInfo( mTextureInfoContainer[ cacheIndex ] );
 652     visualUrl = cachedTextureInfo.url;
 653   }
 654   return visualUrl;
 655 }
 656
 657 TextureManager::LoadState TextureManager::GetTextureState( TextureId textureId )
 658 {
 659   LoadState loadState = TextureManager::LoadState::NOT_STARTED;
 660
 661   int cacheIndex = GetCacheIndexFromId( textureId );
 662   if( cacheIndex != INVALID_CACHE_INDEX )
 663   {
 664     TextureInfo& cachedTextureInfo( mTextureInfoContainer[ cacheIndex ] );
 665     loadState = cachedTextureInfo.loadState;
 666   }
 667   else
 668   {
 669     for( auto&& elem : mExternalTextures )
 670     {
 671       if( elem.textureId == textureId )
 672       {
 673         loadState = LoadState::UPLOADED;
 674         break;
 675       }
 676     }
 677   }
 678   return loadState;
 679 }
 680
 681 TextureManager::LoadState TextureManager::GetTextureStateInternal( TextureId textureId )
 682 {
 683   LoadState loadState = TextureManager::LoadState::NOT_STARTED;
 684
 685   int cacheIndex = GetCacheIndexFromId( textureId );
 686   if( cacheIndex != INVALID_CACHE_INDEX )
 687   {
 688     TextureInfo& cachedTextureInfo( mTextureInfoContainer[ cacheIndex ] );
 689     loadState = cachedTextureInfo.loadState;
 690   }
 691
 692   return loadState;
 693 }
 694
 695 TextureSet TextureManager::GetTextureSet( TextureId textureId )
 696 {
 697   TextureSet textureSet;// empty handle
 698
 699   int cacheIndex = GetCacheIndexFromId( textureId );
 700   if( cacheIndex != INVALID_CACHE_INDEX )
 701   {
 702     TextureInfo& cachedTextureInfo( mTextureInfoContainer[ cacheIndex ] );
 703     textureSet = cachedTextureInfo.textureSet;
 704   }
 705   else
 706   {
 707     for( auto&& elem : mExternalTextures )
 708     {
 709       if( elem.textureId == textureId )
 710       {
 711         textureSet = elem.textureSet;
 712         break;
 713       }
 714     }
 715   }
 716   return textureSet;
 717 }
 718
 719 std::string TextureManager::AddExternalTexture( TextureSet& textureSet )
 720 {
 721   TextureManager::ExternalTextureInfo info;
 722   info.textureId = GenerateUniqueTextureId();
 723   info.textureSet = textureSet;
 724   mExternalTextures.emplace_back( info );
 725   return VisualUrl::CreateTextureUrl( std::to_string( info.textureId ) );
 726 }
 727
 728 TextureSet TextureManager::RemoveExternalTexture( const std::string& url )
 729 {
 730   if( url.size() > 0u )
 731   {
 732     // get the location from the Url
 733     VisualUrl parseUrl( url );
 734     if( VisualUrl::TEXTURE == parseUrl.GetProtocolType() )
 735     {
 736       std::string location = parseUrl.GetLocation();
 737       if( location.size() > 0u )
 738       {
 739         TextureId id = std::stoi( location );
 740         const auto end = mExternalTextures.end();
 741         for( auto iter = mExternalTextures.begin(); iter != end; ++iter )
 742         {
 743           if( iter->textureId == id )
 744           {
 745             auto textureSet = iter->textureSet;
 746             mExternalTextures.erase( iter );
 747             return textureSet;
 748           }
 749         }
 750       }
 751     }
 752   }
 753   return TextureSet();
 754 }
 755
 756 void TextureManager::AddObserver( TextureManager::LifecycleObserver& observer )
 757 {
 758   // make sure an observer doesn't observe the same object twice
 759   // otherwise it will get multiple calls to ObjectDestroyed()
 760   DALI_ASSERT_DEBUG( mLifecycleObservers.End() == std::find( mLifecycleObservers.Begin(), mLifecycleObservers.End(), &observer));
 761   mLifecycleObservers.PushBack( &observer );
 762 }
 763
 764 void TextureManager::RemoveObserver( TextureManager::LifecycleObserver& observer)
 765 {
 766   // Find the observer...
 767   auto endIter =  mLifecycleObservers.End();
 768   for( auto iter = mLifecycleObservers.Begin(); iter != endIter; ++iter)
 769   {
 770     if( (*iter) == &observer)
 771     {
 772       mLifecycleObservers.Erase( iter );
 773       break;
 774     }
 775   }
 776   DALI_ASSERT_DEBUG(endIter != mLifecycleObservers.End());
 777 }
 778
 779 void TextureManager::LoadOrQueueTexture( TextureInfo& textureInfo, TextureUploadObserver* observer )
 780 {
 781   switch( textureInfo.loadState )
 782   {
 783     case LoadState::NOT_STARTED:
 784     case LoadState::LOAD_FAILED:
 785     {
 786       if( mQueueLoadFlag )
 787       {
 788         QueueLoadTexture( textureInfo, observer );
 789       }
 790       else
 791       {
 792         LoadTexture( textureInfo, observer );
 793       }
 794       break;
 795     }
 796     case LoadState::UPLOADED:
 797     {
 798       if( mQueueLoadFlag )
 799       {
 800         QueueLoadTexture( textureInfo, observer );
 801       }
 802       else
 803       {
 804         // The Texture has already loaded. The other observers have already been notified.
 805         // We need to send a "late" loaded notification for this observer.
 806         observer->UploadComplete( true, textureInfo.textureId, textureInfo.textureSet,
 807                                   textureInfo.useAtlas, textureInfo.atlasRect,
 808                                   textureInfo.preMultiplied );
 809       }
 810       break;
 811     }
 812     case LoadState::LOADING:
 813     case LoadState::CANCELLED:
 814     case LoadState::LOAD_FINISHED:
 815     case LoadState::WAITING_FOR_MASK:
 816     case LoadState::MASK_APPLYING:
 817     case LoadState::MASK_APPLIED:
 818     {
 819       break;
 820     }
 821   }
 822 }
 823
 824 void TextureManager::QueueLoadTexture( TextureInfo& textureInfo, TextureUploadObserver* observer )
 825 {
 826   auto textureId = textureInfo.textureId;
 827   mLoadQueue.PushBack( LoadQueueElement( textureId, observer) );
 828
 829   observer->DestructionSignal().Connect( this, &TextureManager::ObserverDestroyed );
 830 }
 831
 832 void TextureManager::LoadTexture( TextureInfo& textureInfo, TextureUploadObserver* observer )
 833 {
 834   DALI_LOG_INFO( gTextureManagerLogFilter, Debug::Concise, "TextureManager::LoadTexture(): url:%s sync:%s\n",
 835                  textureInfo.url.GetUrl().c_str(), textureInfo.loadSynchronously?"T":"F" );
 836
 837   textureInfo.loadState = LoadState::LOADING;
 838   if( !textureInfo.loadSynchronously )
 839   {
 840     auto& loadersContainer = textureInfo.url.IsLocalResource() ? mAsyncLocalLoaders : mAsyncRemoteLoaders;
 841     auto loadingHelperIt = loadersContainer.GetNext();
 842     auto premultiplyOnLoad = ( textureInfo.preMultiplyOnLoad && textureInfo.maskTextureId == INVALID_TEXTURE_ID ) ?
 843                                DevelAsyncImageLoader::PreMultiplyOnLoad::ON : DevelAsyncImageLoader::PreMultiplyOnLoad::OFF;
 844     DALI_ASSERT_ALWAYS(loadingHelperIt != loadersContainer.End());
 845     if( textureInfo.animatedImageLoading )
 846     {
 847       loadingHelperIt->LoadAnimatedImage( textureInfo.textureId, textureInfo.animatedImageLoading, textureInfo.frameIndex );
 848     }
 849     else
 850     {
 851       loadingHelperIt->Load(textureInfo.textureId, textureInfo.url,
 852                             textureInfo.desiredSize, textureInfo.fittingMode,
 853                             textureInfo.samplingMode, textureInfo.orientationCorrection,
 854                             premultiplyOnLoad );
 855     }
 856   }
 857   ObserveTexture( textureInfo, observer );
 858 }
 859
 860 void TextureManager::ProcessQueuedTextures()
 861 {
 862   for( auto&& element : mLoadQueue )
 863   {
 864     if( !element.mObserver )
 865     {
 866       continue;
 867     }
 868
 869     int cacheIndex = GetCacheIndexFromId( element.mTextureId );
 870     if( cacheIndex != INVALID_CACHE_INDEX )
 871     {
 872       TextureInfo& textureInfo( mTextureInfoContainer[cacheIndex] );
 873       if( textureInfo.loadState == LoadState::UPLOADED )
 874       {
 875         element.mObserver->UploadComplete( true, textureInfo.textureId, textureInfo.textureSet,
 876                                            textureInfo.useAtlas, textureInfo.atlasRect,
 877                                            textureInfo.preMultiplied );
 878       }
 879       else if ( textureInfo.loadState == LoadState::LOAD_FINISHED && textureInfo.storageType == StorageType::RETURN_PIXEL_BUFFER )
 880       {
 881         element.mObserver->LoadComplete( true, textureInfo.pixelBuffer, textureInfo.url, textureInfo.preMultiplied );
 882       }
 883       else
 884       {
 885         LoadTexture( textureInfo, element.mObserver );
 886       }
 887     }
 888   }
 889   mLoadQueue.Clear();
 890 }
 891
 892 void TextureManager::ObserveTexture( TextureInfo& textureInfo,
 893                                      TextureUploadObserver* observer )
 894 {
 895   DALI_LOG_INFO( gTextureManagerLogFilter, Debug::Concise, "TextureManager::ObserveTexture(): url:%s observer:%p\n",
 896                  textureInfo.url.GetUrl().c_str(), observer );
 897
 898   if( observer )
 899   {
 900     textureInfo.observerList.PushBack( observer );
 901     observer->DestructionSignal().Connect( this, &TextureManager::ObserverDestroyed );
 902   }
 903 }
 904
 905 void TextureManager::AsyncLoadComplete( AsyncLoadingInfoContainerType& loadingContainer, uint32_t id,
 906                                         Devel::PixelBuffer pixelBuffer )
 907 {
 908   DALI_LOG_INFO( gTextureManagerLogFilter, Debug::Concise, "TextureManager::AsyncLoadComplete( id:%d )\n", id );
 909
 910   if( loadingContainer.size() >= 1u )
 911   {
 912     AsyncLoadingInfo loadingInfo = loadingContainer.front();
 913
 914     if( loadingInfo.loadId == id )
 915     {
 916       int cacheIndex = GetCacheIndexFromId( loadingInfo.textureId );
 917       if( cacheIndex != INVALID_CACHE_INDEX )
 918       {
 919         TextureInfo& textureInfo( mTextureInfoContainer[cacheIndex] );
 920
 921         DALI_LOG_INFO( gTextureManagerLogFilter, Debug::Concise,
 922                        "  textureId:%d Url:%s CacheIndex:%d LoadState: %d\n",
 923                        textureInfo.textureId, textureInfo.url.GetUrl().c_str(), cacheIndex, textureInfo.loadState );
 924
 925         if( textureInfo.loadState != LoadState::CANCELLED )
 926         {
 927           // textureInfo can be invalidated after this call (as the mTextureInfoContainer may be modified)
 928           PostLoad( textureInfo, pixelBuffer );
 929         }
 930         else
 931         {
 932           Remove( textureInfo.textureId, nullptr );
 933         }
 934       }
 935     }
 936
 937     loadingContainer.pop_front();
 938   }
 939 }
 940
 941 void TextureManager::PostLoad( TextureInfo& textureInfo, Devel::PixelBuffer& pixelBuffer )
 942 {
 943   // Was the load successful?
 944   if( pixelBuffer && ( pixelBuffer.GetWidth() != 0 ) && ( pixelBuffer.GetHeight() != 0 ) )
 945   {
 946     // No atlas support for now
 947     textureInfo.useAtlas = NO_ATLAS;
 948     textureInfo.preMultiplied = pixelBuffer.IsAlphaPreMultiplied();
 949
 950     if( textureInfo.storageType == StorageType::UPLOAD_TO_TEXTURE )
 951     {
 952       // If there is a mask texture ID associated with this texture, then apply the mask
 953       // if it's already loaded. If it hasn't, and the mask is still loading,
 954       // wait for the mask to finish loading.
 955       if( textureInfo.maskTextureId != INVALID_TEXTURE_ID )
 956       {
 957         if( textureInfo.loadState == LoadState::MASK_APPLYING )
 958         {
 959           textureInfo.loadState = LoadState::MASK_APPLIED;
 960           UploadTexture( pixelBuffer, textureInfo );
 961           NotifyObservers( textureInfo, true );
 962         }
 963         else
 964         {
 965           LoadState maskLoadState = GetTextureStateInternal( textureInfo.maskTextureId );
 966           textureInfo.pixelBuffer = pixelBuffer; // Store the pixel buffer temporarily
 967           if( maskLoadState == LoadState::LOADING )
 968           {
 969             textureInfo.loadState = LoadState::WAITING_FOR_MASK;
 970           }
 971           else if( maskLoadState == LoadState::LOAD_FINISHED )
 972           {
 973             // Send New Task to Thread
 974             ApplyMask( textureInfo, textureInfo.maskTextureId );
 975           }
 976         }
 977       }
 978       else
 979       {
 980         UploadTexture( pixelBuffer, textureInfo );
 981         NotifyObservers( textureInfo, true );
 982       }
 983     }
 984     else
 985     {
 986       textureInfo.pixelBuffer = pixelBuffer; // Store the pixel data
 987       textureInfo.loadState = LoadState::LOAD_FINISHED;
 988
 989       if( textureInfo.storageType == StorageType::RETURN_PIXEL_BUFFER )
 990       {
 991         NotifyObservers( textureInfo, true );
 992       }
 993       else
 994       {
 995         // Check if there was another texture waiting for this load to complete
 996         // (e.g. if this was an image mask, and its load is on a different thread)
 997         CheckForWaitingTexture( textureInfo );
 998       }
 999     }
1000   }
1001   else
1002   {
1003     // @todo If the load was unsuccessful, upload the broken image.
1004     textureInfo.loadState = LoadState::LOAD_FAILED;
1005     CheckForWaitingTexture( textureInfo );
1006     NotifyObservers( textureInfo, false );
1007   }
1008 }
1009
1010 void TextureManager::CheckForWaitingTexture( TextureInfo& maskTextureInfo )
1011 {
1012   // Search the cache, checking if any texture has this texture id as a
1013   // maskTextureId:
1014   const unsigned int size = mTextureInfoContainer.size();
1015
1016   for( unsigned int cacheIndex = 0; cacheIndex < size; ++cacheIndex )
1017   {
1018     if( mTextureInfoContainer[cacheIndex].maskTextureId == maskTextureInfo.textureId &&
1019         mTextureInfoContainer[cacheIndex].loadState == LoadState::WAITING_FOR_MASK )
1020     {
1021       TextureInfo& textureInfo( mTextureInfoContainer[cacheIndex] );
1022
1023       if( maskTextureInfo.loadState == LoadState::LOAD_FINISHED )
1024       {
1025         // Send New Task to Thread
1026         ApplyMask( textureInfo, maskTextureInfo.textureId );
1027       }
1028       else
1029       {
1030         textureInfo.pixelBuffer.Reset();
1031         textureInfo.loadState = LoadState::LOAD_FAILED;
1032         NotifyObservers( textureInfo, false );
1033       }
1034     }
1035   }
1036 }
1037
1038 void TextureManager::ApplyMask( TextureInfo& textureInfo, TextureId maskTextureId )
1039 {
1040   int maskCacheIndex = GetCacheIndexFromId( maskTextureId );
1041   if( maskCacheIndex != INVALID_CACHE_INDEX )
1042   {
1043     Devel::PixelBuffer maskPixelBuffer = mTextureInfoContainer[maskCacheIndex].pixelBuffer;
1044     Devel::PixelBuffer pixelBuffer = textureInfo.pixelBuffer;
1045     textureInfo.pixelBuffer.Reset();
1046
1047     DALI_LOG_INFO( gTextureManagerLogFilter, Debug::Concise, "TextureManager::ApplyMask(): url:%s sync:%s\n",
1048                    textureInfo.url.GetUrl().c_str(), textureInfo.loadSynchronously?"T":"F" );
1049
1050     textureInfo.loadState = LoadState::MASK_APPLYING;
1051     auto& loadersContainer = textureInfo.url.IsLocalResource() ? mAsyncLocalLoaders : mAsyncRemoteLoaders;
1052     auto loadingHelperIt = loadersContainer.GetNext();
1053     auto premultiplyOnLoad = textureInfo.preMultiplyOnLoad ? DevelAsyncImageLoader::PreMultiplyOnLoad::ON : DevelAsyncImageLoader::PreMultiplyOnLoad::OFF;
1054     DALI_ASSERT_ALWAYS(loadingHelperIt != loadersContainer.End());
1055     loadingHelperIt->ApplyMask( textureInfo.textureId, pixelBuffer, maskPixelBuffer, textureInfo.scaleFactor, textureInfo.cropToMask, premultiplyOnLoad );
1056   }
1057 }
1058
1059 void TextureManager::UploadTexture( Devel::PixelBuffer& pixelBuffer, TextureInfo& textureInfo )
1060 {
1061   if( textureInfo.useAtlas != USE_ATLAS )
1062   {
1063     DALI_LOG_INFO( gTextureManagerLogFilter, Debug::General, "  TextureManager::UploadTexture() New Texture for textureId:%d\n", textureInfo.textureId );
1064
1065     // Check if this pixelBuffer is premultiplied
1066     textureInfo.preMultiplied = pixelBuffer.IsAlphaPreMultiplied();
1067
1068     auto& renderingAddOn = RenderingAddOn::Get();
1069     if( renderingAddOn.IsValid() )
1070     {
1071       renderingAddOn.CreateGeometry( textureInfo.textureId, pixelBuffer );
1072     }
1073
1074     Texture texture = Texture::New( Dali::TextureType::TEXTURE_2D, pixelBuffer.GetPixelFormat(),
1075                                     pixelBuffer.GetWidth(), pixelBuffer.GetHeight() );
1076
1077     PixelData pixelData = Devel::PixelBuffer::Convert( pixelBuffer );
1078     texture.Upload( pixelData );
1079     if ( ! textureInfo.textureSet )
1080     {
1081       textureInfo.textureSet = TextureSet::New();
1082     }
1083     textureInfo.textureSet.SetTexture( 0u, texture );
1084   }
1085
1086   // Update the load state.
1087   // Note: This is regardless of success as we care about whether a
1088   // load attempt is in progress or not.  If unsuccessful, a broken
1089   // image is still loaded.
1090   textureInfo.loadState = LoadState::UPLOADED;
1091 }
1092
1093 void TextureManager::NotifyObservers( TextureInfo& textureInfo, bool success )
1094 {
1095   TextureId textureId = textureInfo.textureId;
1096
1097   // If there is an observer: Notify the load is complete, whether successful or not,
1098   // and erase it from the list
1099   TextureInfo* info = &textureInfo;
1100
1101   mQueueLoadFlag = true;
1102
1103   while( info->observerList.Count() )
1104   {
1105     TextureUploadObserver* observer = info->observerList[0];
1106
1107     // During UploadComplete() a Control ResourceReady() signal is emitted.
1108     // During that signal the app may add remove /add Textures (e.g. via
1109     // ImageViews).
1110     // It is possible for observers to be removed from the observer list,
1111     // and it is also possible for the mTextureInfoContainer to be modified,
1112     // invalidating the reference to the textureInfo struct.
1113     // Texture load requests for the same URL are deferred until the end of this
1114     // method.
1115     DALI_LOG_INFO( gTextureManagerLogFilter, Debug::Concise, "NotifyObservers() url:%s loadState:%s\n",
1116                    textureInfo.url.GetUrl().c_str(), GET_LOAD_STATE_STRING(textureInfo.loadState ) );
1117
1118     // It is possible for the observer to be deleted.
1119     // Disconnect and remove the observer first.
1120     observer->DestructionSignal().Disconnect( this, &TextureManager::ObserverDestroyed );
1121
1122     info->observerList.Erase( info->observerList.begin() );
1123
1124     if( info->storageType == StorageType::RETURN_PIXEL_BUFFER )
1125     {
1126       observer->LoadComplete( success, info->pixelBuffer, info->url, info->preMultiplied );
1127     }
1128     else
1129     {
1130       observer->UploadComplete( success, info->textureId, info->textureSet, info->useAtlas, info->atlasRect,
1131                                 info->preMultiplied );
1132     }
1133
1134     // Get the textureInfo from the container again as it may have been invalidated.
1135     int textureInfoIndex = GetCacheIndexFromId( textureId );
1136     if( textureInfoIndex == INVALID_CACHE_INDEX)
1137     {
1138       break; // texture has been removed - can stop.
1139     }
1140     info = &mTextureInfoContainer[ textureInfoIndex ];
1141   }
1142
1143   mQueueLoadFlag = false;
1144   ProcessQueuedTextures();
1145
1146   if( info->storageType == StorageType::RETURN_PIXEL_BUFFER && info->observerList.Count() == 0 )
1147   {
1148     Remove( info->textureId, nullptr );
1149   }
1150 }
1151
1152 TextureManager::TextureId TextureManager::GenerateUniqueTextureId()
1153 {
1154   return mCurrentTextureId++;
1155 }
1156
1157 int TextureManager::GetCacheIndexFromId( const TextureId textureId )
1158 {
1159   const unsigned int size = mTextureInfoContainer.size();
1160
1161   for( unsigned int i = 0; i < size; ++i )
1162   {
1163     if( mTextureInfoContainer[i].textureId == textureId )
1164     {
1165       return i;
1166     }
1167   }
1168
1169   return INVALID_CACHE_INDEX;
1170 }
1171
1172 TextureManager::TextureHash TextureManager::GenerateHash(
1173   const std::string&             url,
1174   const ImageDimensions          size,
1175   const FittingMode::Type        fittingMode,
1176   const Dali::SamplingMode::Type samplingMode,
1177   const UseAtlas                 useAtlas,
1178   TextureId                      maskTextureId,
1179   bool                           isAnimationImage,
1180   uint32_t                       frameIndex )
1181 {
1182   std::string hashTarget( url );
1183   const size_t urlLength = hashTarget.length();
1184   const uint16_t width = size.GetWidth();
1185   const uint16_t height = size.GetWidth();
1186
1187   // If either the width or height has been specified, include the resizing options in the hash
1188   if( width != 0 || height != 0 )
1189   {
1190     // We are appending 5 bytes to the URL to form the hash input.
1191     hashTarget.resize( urlLength + 5u );
1192     char* hashTargetPtr = &( hashTarget[ urlLength ] );
1193
1194     // Pack the width and height (4 bytes total).
1195     *hashTargetPtr++ = size.GetWidth() & 0xff;
1196     *hashTargetPtr++ = ( size.GetWidth() >> 8u ) & 0xff;
1197     *hashTargetPtr++ = size.GetHeight() & 0xff;
1198     *hashTargetPtr++ = ( size.GetHeight() >> 8u ) & 0xff;
1199
1200     // Bit-pack the FittingMode, SamplingMode and atlasing.
1201     // FittingMode=2bits, SamplingMode=3bits, useAtlas=1bit
1202     *hashTargetPtr   = ( fittingMode << 4u ) | ( samplingMode << 1 ) | useAtlas;
1203   }
1204   else
1205   {
1206     // We are not including sizing information, but we still need an extra byte for atlasing.
1207     hashTarget.resize( urlLength + 1u );
1208
1209     // Add the atlasing to the hash input.
1210     switch( useAtlas )
1211     {
1212       case UseAtlas::NO_ATLAS:
1213       {
1214         hashTarget[ urlLength ] = 'f';
1215         break;
1216       }
1217       case UseAtlas::USE_ATLAS:
1218       {
1219         hashTarget[ urlLength ] = 't';
1220         break;
1221       }
1222     }
1223   }
1224
1225   if( isAnimationImage )
1226   {
1227     auto textureIdIndex = hashTarget.length();
1228     hashTarget.resize( hashTarget.length() + sizeof( uint32_t ) );
1229     char* hashTargetPtr = &( hashTarget[ textureIdIndex ] );
1230
1231     for( size_t byteIter = 0; byteIter < sizeof( uint32_t ); ++byteIter )
1232     {
1233       *hashTargetPtr++ = frameIndex & 0xff;
1234       frameIndex >>= 8u;
1235     }
1236   }
1237
1238   if( maskTextureId != INVALID_TEXTURE_ID )
1239   {
1240     auto textureIdIndex = hashTarget.length();
1241     hashTarget.resize( hashTarget.length() + sizeof( TextureId ) );
1242     unsigned char* hashTargetPtr = reinterpret_cast<unsigned char*>(&( hashTarget[ textureIdIndex ] ));
1243
1244     // Append the texture id to the end of the URL byte by byte:
1245     // (to avoid SIGBUS / alignment issues)
1246     for( size_t byteIter = 0; byteIter < sizeof( TextureId ); ++byteIter )
1247     {
1248       *hashTargetPtr++ = maskTextureId & 0xff;
1249       maskTextureId >>= 8u;
1250     }
1251   }
1252
1253   return Dali::CalculateHash( hashTarget );
1254 }
1255
1256 int TextureManager::FindCachedTexture(
1257   const TextureManager::TextureHash hash,
1258   const std::string&                url,
1259   const ImageDimensions             size,
1260   const FittingMode::Type           fittingMode,
1261   const Dali::SamplingMode::Type    samplingMode,
1262   const bool                        useAtlas,
1263   TextureId                         maskTextureId,
1264   TextureManager::MultiplyOnLoad    preMultiplyOnLoad,
1265   bool                              isAnimatedImage,
1266   uint32_t                          frameIndex )
1267 {
1268   // Default to an invalid ID, in case we do not find a match.
1269   int cacheIndex = INVALID_CACHE_INDEX;
1270
1271   // Iterate through our hashes to find a match.
1272   const unsigned int count = mTextureInfoContainer.size();
1273   for( unsigned int i = 0u; i < count; ++i )
1274   {
1275     if( mTextureInfoContainer[i].hash == hash )
1276     {
1277       // We have a match, now we check all the original parameters in case of a hash collision.
1278       TextureInfo& textureInfo( mTextureInfoContainer[i] );
1279
1280       if( ( url == textureInfo.url.GetUrl() ) &&
1281           ( useAtlas == textureInfo.useAtlas ) &&
1282           ( maskTextureId == textureInfo.maskTextureId ) &&
1283           ( size == textureInfo.desiredSize ) &&
1284           ( ( size.GetWidth() == 0 && size.GetHeight() == 0 ) ||
1285             ( fittingMode == textureInfo.fittingMode &&
1286               samplingMode == textureInfo.samplingMode ) ) &&
1287           ( isAnimatedImage == ( ( textureInfo.animatedImageLoading ) ? true : false ) ) &&
1288           ( frameIndex == textureInfo.frameIndex ) )
1289       {
1290         // 1. If preMultiplyOnLoad is MULTIPLY_ON_LOAD, then textureInfo.preMultiplyOnLoad should be true. The premultiplication result can be different.
1291         // 2. If preMultiplyOnLoad is LOAD_WITHOUT_MULTIPLY, then textureInfo.preMultiplied should be false.
1292         if( ( preMultiplyOnLoad == TextureManager::MultiplyOnLoad::MULTIPLY_ON_LOAD && textureInfo.preMultiplyOnLoad )
1293             || ( preMultiplyOnLoad == TextureManager::MultiplyOnLoad::LOAD_WITHOUT_MULTIPLY && !textureInfo.preMultiplied ) )
1294         {
1295           // The found Texture is a match.
1296           cacheIndex = i;
1297           break;
1298         }
1299       }
1300     }
1301   }
1302
1303   return cacheIndex;
1304 }
1305
1306 void TextureManager::ObserverDestroyed( TextureUploadObserver* observer )
1307 {
1308   const unsigned int count = mTextureInfoContainer.size();
1309   for( unsigned int i = 0; i < count; ++i )
1310   {
1311     TextureInfo& textureInfo( mTextureInfoContainer[i] );
1312     for( TextureInfo::ObserverListType::Iterator j = textureInfo.observerList.Begin();
1313          j != textureInfo.observerList.End(); )
1314     {
1315       if( *j == observer )
1316       {
1317         j = textureInfo.observerList.Erase( j );
1318       }
1319       else
1320       {
1321         ++j;
1322       }
1323     }
1324   }
1325
1326   // Remove element from the LoadQueue
1327   for( auto&& element : mLoadQueue )
1328   {
1329     if( element.mObserver == observer )
1330     {
1331       element.mObserver = nullptr;
1332     }
1333   }
1334 }
1335
1336
1337 TextureManager::AsyncLoadingHelper::AsyncLoadingHelper(TextureManager& textureManager)
1338 : AsyncLoadingHelper(Toolkit::AsyncImageLoader::New(), textureManager,
1339                      AsyncLoadingInfoContainerType())
1340 {
1341 }
1342
1343 void TextureManager::AsyncLoadingHelper::LoadAnimatedImage( TextureId                   textureId,
1344                                                             Dali::AnimatedImageLoading  animatedImageLoading,
1345                                                             uint32_t                    frameIndex )
1346 {
1347   mLoadingInfoContainer.push_back( AsyncLoadingInfo( textureId ) );
1348   auto id = DevelAsyncImageLoader::LoadAnimatedImage( mLoader, animatedImageLoading, frameIndex );
1349   mLoadingInfoContainer.back().loadId = id;
1350 }
1351
1352 void TextureManager::AsyncLoadingHelper::Load( TextureId                                textureId,
1353                                                const VisualUrl&                         url,
1354                                                ImageDimensions                          desiredSize,
1355                                                FittingMode::Type                        fittingMode,
1356                                                SamplingMode::Type                       samplingMode,
1357                                                bool                                     orientationCorrection,
1358                                                DevelAsyncImageLoader::PreMultiplyOnLoad preMultiplyOnLoad )
1359 {
1360   mLoadingInfoContainer.push_back( AsyncLoadingInfo( textureId ) );
1361   auto id = DevelAsyncImageLoader::Load( mLoader, url.GetUrl(), desiredSize, fittingMode, samplingMode, orientationCorrection, preMultiplyOnLoad );
1362   mLoadingInfoContainer.back().loadId = id;
1363 }
1364
1365 void TextureManager::AsyncLoadingHelper::ApplyMask( TextureId                                textureId,
1366                                                     Devel::PixelBuffer                       pixelBuffer,
1367                                                     Devel::PixelBuffer                       maskPixelBuffer,
1368                                                     float                                    contentScale,
1369                                                     bool                                     cropToMask,
1370                                                     DevelAsyncImageLoader::PreMultiplyOnLoad preMultiplyOnLoad )
1371 {
1372   mLoadingInfoContainer.push_back( AsyncLoadingInfo( textureId ) );
1373   auto id = DevelAsyncImageLoader::ApplyMask( mLoader, pixelBuffer, maskPixelBuffer, contentScale, cropToMask, preMultiplyOnLoad );
1374   mLoadingInfoContainer.back().loadId = id;
1375 }
1376
1377 TextureManager::AsyncLoadingHelper::AsyncLoadingHelper(AsyncLoadingHelper&& rhs)
1378 : AsyncLoadingHelper(rhs.mLoader, rhs.mTextureManager, std::move(rhs.mLoadingInfoContainer))
1379 {
1380 }
1381
1382 TextureManager::AsyncLoadingHelper::AsyncLoadingHelper(
1383     Toolkit::AsyncImageLoader loader,
1384     TextureManager& textureManager,
1385     AsyncLoadingInfoContainerType&& loadingInfoContainer)
1386 : mLoader(loader),
1387   mTextureManager(textureManager),
1388   mLoadingInfoContainer(std::move(loadingInfoContainer))
1389 {
1390   DevelAsyncImageLoader::PixelBufferLoadedSignal(mLoader).Connect(
1391       this, &AsyncLoadingHelper::AsyncLoadComplete);
1392 }
1393
1394 void TextureManager::AsyncLoadingHelper::AsyncLoadComplete(uint32_t           id,
1395                                                            Devel::PixelBuffer pixelBuffer )
1396 {
1397   mTextureManager.AsyncLoadComplete( mLoadingInfoContainer, id, pixelBuffer );
1398 }
1399
1400 void TextureManager::SetBrokenImageUrl(const std::string& brokenImageUrl)
1401 {
1402   mBrokenImageUrl = brokenImageUrl;
1403 }
1404
1405 const std::string TextureManager::GetBrokenImageUrl()
1406 {
1407   return mBrokenImageUrl;
1408 }
1409
1410 Geometry TextureManager::GetRenderGeometry(TextureId textureId, uint32_t& frontElements, uint32_t& backElements )
1411 {
1412   return RenderingAddOn::Get().IsValid() ?
1413          RenderingAddOn::Get().GetGeometry( textureId, frontElements, backElements) :
1414          Geometry();
1415 }
1416
1417 } // namespace Internal
1418
1419 } // namespace Toolkit
1420
1421 } // namespace Dali