dali/internal/render/common/render-manager.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/internal/render/common/render-manager.h>
  20
  21 // EXTERNAL INCLUDES
  22 #include <memory.h>
  23
  24 // INTERNAL INCLUDES
  25 #include <dali/public-api/actors/sampling.h>
  26 #include <dali/public-api/common/dali-common.h>
  27 #include <dali/public-api/common/stage.h>
  28 #include <dali/public-api/render-tasks/render-task.h>
  29 #include <dali/devel-api/threading/thread-pool.h>
  30 #include <dali/integration-api/debug.h>
  31 #include <dali/integration-api/core.h>
  32 #include <dali/integration-api/gl-context-helper-abstraction.h>
  33 #include <dali/internal/common/owner-pointer.h>
  34 #include <dali/internal/event/common/scene-impl.h>
  35 #include <dali/internal/render/common/render-algorithms.h>
  36 #include <dali/internal/render/common/render-debug.h>
  37 #include <dali/internal/render/common/render-tracker.h>
  38 #include <dali/internal/render/common/render-instruction-container.h>
  39 #include <dali/internal/render/common/render-instruction.h>
  40 #include <dali/internal/render/gl-resources/context.h>
  41 #include <dali/internal/render/queue/render-queue.h>
  42 #include <dali/internal/render/renderers/render-frame-buffer.h>
  43 #include <dali/internal/render/renderers/render-geometry.h>
  44 #include <dali/internal/render/renderers/render-renderer.h>
  45 #include <dali/internal/render/renderers/render-sampler.h>
  46 #include <dali/internal/render/shaders/program-controller.h>
  47 #include <dali/internal/update/common/scene-graph-scene.h>
  48
  49 namespace Dali
  50 {
  51
  52 namespace Internal
  53 {
  54
  55 namespace SceneGraph
  56 {
  57
  58 #if defined(DEBUG_ENABLED)
  59 namespace
  60 {
  61 Debug::Filter* gLogFilter = Debug::Filter::New(Debug::NoLogging, false, "LOG_RENDER_MANAGER" );
  62 } // unnamed namespace
  63 #endif
  64
  65 /**
  66  * Structure to contain internal data
  67  */
  68 struct RenderManager::Impl
  69 {
  70   Impl( Integration::GlAbstraction& glAbstraction,
  71         Integration::GlSyncAbstraction& glSyncAbstraction,
  72         Integration::GlContextHelperAbstraction& glContextHelperAbstraction,
  73         Integration::DepthBufferAvailable depthBufferAvailableParam,
  74         Integration::StencilBufferAvailable stencilBufferAvailableParam )
  75   : context( glAbstraction, &sceneContextContainer ),
  76     currentContext( &context ),
  77     glAbstraction( glAbstraction ),
  78     glSyncAbstraction( glSyncAbstraction ),
  79     glContextHelperAbstraction( glContextHelperAbstraction ),
  80     renderQueue(),
  81     renderAlgorithms(),
  82     frameCount( 0u ),
  83     renderBufferIndex( SceneGraphBuffers::INITIAL_UPDATE_BUFFER_INDEX ),
  84     defaultSurfaceRect(),
  85     rendererContainer(),
  86     samplerContainer(),
  87     textureContainer(),
  88     frameBufferContainer(),
  89     lastFrameWasRendered( false ),
  90     programController( glAbstraction ),
  91     depthBufferAvailable( depthBufferAvailableParam ),
  92     stencilBufferAvailable( stencilBufferAvailableParam ),
  93     defaultSurfaceOrientation( 0 )
  94   {
  95      // Create thread pool with just one thread ( there may be a need to create more threads in the future ).
  96     threadPool = std::unique_ptr<Dali::ThreadPool>( new Dali::ThreadPool() );
  97     threadPool->Initialize( 1u );
  98   }
  99
 100   ~Impl()
 101   {
 102     threadPool.reset( nullptr ); // reset now to maintain correct destruction order
 103   }
 104
 105   void AddRenderTracker( Render::RenderTracker* renderTracker )
 106   {
 107     DALI_ASSERT_DEBUG( renderTracker != NULL );
 108     mRenderTrackers.PushBack( renderTracker );
 109   }
 110
 111   void RemoveRenderTracker( Render::RenderTracker* renderTracker )
 112   {
 113     mRenderTrackers.EraseObject( renderTracker );
 114   }
 115
 116   Context* CreateSceneContext()
 117   {
 118     sceneContextContainer.push_back( new Context( glAbstraction ) );
 119     return sceneContextContainer[ sceneContextContainer.size() - 1 ];
 120   }
 121
 122   void DestroySceneContext( Context* sceneContext )
 123   {
 124     auto iter = std::find( sceneContextContainer.begin(), sceneContextContainer.end(), sceneContext );
 125     if( iter != sceneContextContainer.end() )
 126     {
 127       sceneContextContainer.erase( iter );
 128     }
 129   }
 130
 131   Context* ReplaceSceneContext( Context* oldSceneContext )
 132   {
 133     Context* newContext = new Context( glAbstraction );
 134     std::replace( sceneContextContainer.begin(), sceneContextContainer.end(), oldSceneContext, newContext );
 135     return newContext;
 136   }
 137
 138   void UpdateTrackers()
 139   {
 140     for( auto&& iter : mRenderTrackers )
 141     {
 142       iter->PollSyncObject();
 143     }
 144   }
 145
 146   // the order is important for destruction,
 147   // programs are owned by context at the moment.
 148   Context                                   context;                 ///< Holds the GL state of the share resource context
 149   Context*                                  currentContext;          ///< Holds the GL state of the current context for rendering
 150   std::vector< Context* >                   sceneContextContainer;   ///< List of owned contexts holding the GL state per scene
 151   Integration::GlAbstraction&               glAbstraction;           ///< GL abstraction
 152   Integration::GlSyncAbstraction&           glSyncAbstraction;       ///< GL sync abstraction
 153   Integration::GlContextHelperAbstraction&  glContextHelperAbstraction; ///< GL context helper abstraction
 154   RenderQueue                               renderQueue;             ///< A message queue for receiving messages from the update-thread.
 155
 156   std::vector< SceneGraph::Scene* >         sceneContainer;          ///< List of pointers to the scene graph objects of the scenes
 157
 158   Render::RenderAlgorithms                  renderAlgorithms;        ///< The RenderAlgorithms object is used to action the renders required by a RenderInstruction
 159
 160   uint32_t                                  frameCount;              ///< The current frame count
 161   BufferIndex                               renderBufferIndex;       ///< The index of the buffer to read from; this is opposite of the "update" buffer
 162
 163   Rect<int32_t>                             defaultSurfaceRect;      ///< Rectangle for the default surface we are rendering to
 164
 165   OwnerContainer< Render::Renderer* >       rendererContainer;       ///< List of owned renderers
 166   OwnerContainer< Render::Sampler* >        samplerContainer;        ///< List of owned samplers
 167   OwnerContainer< Render::Texture* >        textureContainer;        ///< List of owned textures
 168   OwnerContainer< Render::FrameBuffer* >    frameBufferContainer;    ///< List of owned framebuffers
 169   OwnerContainer< Render::PropertyBuffer* > propertyBufferContainer; ///< List of owned property buffers
 170   OwnerContainer< Render::Geometry* >       geometryContainer;       ///< List of owned Geometries
 171
 172   bool                                      lastFrameWasRendered;    ///< Keeps track of the last frame being rendered due to having render instructions
 173
 174   OwnerContainer< Render::RenderTracker* >  mRenderTrackers;         ///< List of render trackers
 175
 176   ProgramController                         programController;        ///< Owner of the GL programs
 177
 178   Integration::DepthBufferAvailable         depthBufferAvailable;     ///< Whether the depth buffer is available
 179   Integration::StencilBufferAvailable       stencilBufferAvailable;   ///< Whether the stencil buffer is available
 180
 181   std::unique_ptr<Dali::ThreadPool>         threadPool;               ///< The thread pool
 182   Vector<GLuint>                            boundTextures;            ///< The textures bound for rendering
 183   Vector<GLuint>                            textureDependencyList;    ///< The dependency list of binded textures
 184   int                                       defaultSurfaceOrientation; ///< defaultSurfaceOrientation for the default surface we are rendering to
 185
 186 };
 187
 188 RenderManager* RenderManager::New( Integration::GlAbstraction& glAbstraction,
 189                                    Integration::GlSyncAbstraction& glSyncAbstraction,
 190                                    Integration::GlContextHelperAbstraction& glContextHelperAbstraction,
 191                                    Integration::DepthBufferAvailable depthBufferAvailable,
 192                                    Integration::StencilBufferAvailable stencilBufferAvailable )
 193 {
 194   RenderManager* manager = new RenderManager;
 195   manager->mImpl = new Impl( glAbstraction,
 196                              glSyncAbstraction,
 197                              glContextHelperAbstraction,
 198                              depthBufferAvailable,
 199                              stencilBufferAvailable );
 200   return manager;
 201 }
 202
 203 RenderManager::RenderManager()
 204 : mImpl(NULL)
 205 {
 206 }
 207
 208 RenderManager::~RenderManager()
 209 {
 210   delete mImpl;
 211 }
 212
 213 RenderQueue& RenderManager::GetRenderQueue()
 214 {
 215   return mImpl->renderQueue;
 216 }
 217
 218 void RenderManager::ContextCreated()
 219 {
 220   mImpl->context.GlContextCreated();
 221   mImpl->programController.GlContextCreated();
 222
 223   // renderers, textures and gpu buffers cannot reinitialize themselves
 224   // so they rely on someone reloading the data for them
 225 }
 226
 227 void RenderManager::ContextDestroyed()
 228 {
 229   mImpl->context.GlContextDestroyed();
 230   mImpl->programController.GlContextDestroyed();
 231
 232   //Inform textures
 233   for( auto&& texture : mImpl->textureContainer )
 234   {
 235     texture->GlContextDestroyed();
 236   }
 237
 238   //Inform framebuffers
 239   for( auto&& framebuffer : mImpl->frameBufferContainer )
 240   {
 241     framebuffer->GlContextDestroyed();
 242   }
 243
 244   // inform renderers
 245   for( auto&& renderer : mImpl->rendererContainer )
 246   {
 247     renderer->GlContextDestroyed();
 248   }
 249
 250   // inform scenes
 251   for( auto&& scene : mImpl->sceneContainer )
 252   {
 253     scene->GlContextDestroyed();
 254   }
 255 }
 256
 257 void RenderManager::SetShaderSaver( ShaderSaver& upstream )
 258 {
 259   mImpl->programController.SetShaderSaver( upstream );
 260 }
 261
 262 void RenderManager::SetDefaultSurfaceRect(const Rect<int32_t>& rect)
 263 {
 264   mImpl->defaultSurfaceRect = rect;
 265 }
 266
 267 void RenderManager::SetDefaultSurfaceOrientation( int orientation )
 268 {
 269   mImpl->defaultSurfaceOrientation = orientation;
 270 }
 271
 272 void RenderManager::AddRenderer( OwnerPointer< Render::Renderer >& renderer )
 273 {
 274   // Initialize the renderer as we are now in render thread
 275   renderer->Initialize( mImpl->context );
 276
 277   mImpl->rendererContainer.PushBack( renderer.Release() );
 278 }
 279
 280 void RenderManager::RemoveRenderer( Render::Renderer* renderer )
 281 {
 282   mImpl->rendererContainer.EraseObject( renderer );
 283 }
 284
 285 void RenderManager::AddSampler( OwnerPointer< Render::Sampler >& sampler )
 286 {
 287   mImpl->samplerContainer.PushBack( sampler.Release() );
 288 }
 289
 290 void RenderManager::RemoveSampler( Render::Sampler* sampler )
 291 {
 292   mImpl->samplerContainer.EraseObject( sampler );
 293 }
 294
 295 void RenderManager::AddTexture( OwnerPointer< Render::Texture >& texture )
 296 {
 297   texture->Initialize( mImpl->context );
 298   mImpl->textureContainer.PushBack( texture.Release() );
 299 }
 300
 301 void RenderManager::RemoveTexture( Render::Texture* texture )
 302 {
 303   DALI_ASSERT_DEBUG( NULL != texture );
 304
 305   // Find the texture, use reference to pointer so we can do the erase safely
 306   for ( auto&& iter : mImpl->textureContainer )
 307   {
 308     if ( iter == texture )
 309     {
 310       texture->Destroy( mImpl->context );
 311       mImpl->textureContainer.Erase( &iter ); // Texture found; now destroy it
 312       return;
 313     }
 314   }
 315 }
 316
 317 void RenderManager::UploadTexture( Render::Texture* texture, PixelDataPtr pixelData, const Texture::UploadParams& params )
 318 {
 319   texture->Upload( mImpl->context, pixelData, params );
 320 }
 321
 322 void RenderManager::GenerateMipmaps( Render::Texture* texture )
 323 {
 324   texture->GenerateMipmaps( mImpl->context );
 325 }
 326
 327 void RenderManager::SetFilterMode( Render::Sampler* sampler, uint32_t minFilterMode, uint32_t magFilterMode )
 328 {
 329   sampler->mMinificationFilter = static_cast<Dali::FilterMode::Type>(minFilterMode);
 330   sampler->mMagnificationFilter = static_cast<Dali::FilterMode::Type>(magFilterMode );
 331 }
 332
 333 void RenderManager::SetWrapMode( Render::Sampler* sampler, uint32_t rWrapMode, uint32_t sWrapMode, uint32_t tWrapMode )
 334 {
 335   sampler->mRWrapMode = static_cast<Dali::WrapMode::Type>(rWrapMode);
 336   sampler->mSWrapMode = static_cast<Dali::WrapMode::Type>(sWrapMode);
 337   sampler->mTWrapMode = static_cast<Dali::WrapMode::Type>(tWrapMode);
 338 }
 339
 340 void RenderManager::AddFrameBuffer( OwnerPointer< Render::FrameBuffer >& frameBuffer )
 341 {
 342   Render::FrameBuffer* frameBufferPtr = frameBuffer.Release();
 343   mImpl->frameBufferContainer.PushBack( frameBufferPtr );
 344   frameBufferPtr->Initialize( mImpl->context );
 345 }
 346
 347 void RenderManager::RemoveFrameBuffer( Render::FrameBuffer* frameBuffer )
 348 {
 349   DALI_ASSERT_DEBUG( NULL != frameBuffer );
 350
 351   // Find the sampler, use reference so we can safely do the erase
 352   for ( auto&& iter : mImpl->frameBufferContainer )
 353   {
 354     if ( iter == frameBuffer )
 355     {
 356       frameBuffer->Destroy( mImpl->context );
 357       mImpl->frameBufferContainer.Erase( &iter ); // frameBuffer found; now destroy it
 358
 359       break;
 360     }
 361   }
 362 }
 363 void RenderManager::InitializeScene( SceneGraph::Scene* scene )
 364 {
 365   scene->Initialize( *mImpl->CreateSceneContext() );
 366   mImpl->sceneContainer.push_back( scene );
 367 }
 368
 369 void RenderManager::UninitializeScene( SceneGraph::Scene* scene )
 370 {
 371   mImpl->DestroySceneContext( scene->GetContext() );
 372
 373   auto iter = std::find( mImpl->sceneContainer.begin(), mImpl->sceneContainer.end(), scene );
 374   if( iter != mImpl->sceneContainer.end() )
 375   {
 376     mImpl->sceneContainer.erase( iter );
 377   }
 378 }
 379
 380 void RenderManager::SurfaceReplaced( SceneGraph::Scene* scene )
 381 {
 382   Context* newContext = mImpl->ReplaceSceneContext( scene->GetContext() );
 383   scene->Initialize( *newContext );
 384 }
 385
 386 void RenderManager::AttachColorTextureToFrameBuffer( Render::FrameBuffer* frameBuffer, Render::Texture* texture, uint32_t mipmapLevel, uint32_t layer )
 387 {
 388   frameBuffer->AttachColorTexture( mImpl->context, texture, mipmapLevel, layer );
 389 }
 390
 391 void RenderManager::AddPropertyBuffer( OwnerPointer< Render::PropertyBuffer >& propertyBuffer )
 392 {
 393   mImpl->propertyBufferContainer.PushBack( propertyBuffer.Release() );
 394 }
 395
 396 void RenderManager::RemovePropertyBuffer( Render::PropertyBuffer* propertyBuffer )
 397 {
 398   mImpl->propertyBufferContainer.EraseObject( propertyBuffer );
 399 }
 400
 401 void RenderManager::SetPropertyBufferFormat( Render::PropertyBuffer* propertyBuffer, OwnerPointer< Render::PropertyBuffer::Format>& format )
 402 {
 403   propertyBuffer->SetFormat( format.Release() );
 404 }
 405
 406 void RenderManager::SetPropertyBufferData( Render::PropertyBuffer* propertyBuffer, OwnerPointer< Vector<uint8_t> >& data, uint32_t size )
 407 {
 408   propertyBuffer->SetData( data.Release(), size );
 409 }
 410
 411 void RenderManager::SetIndexBuffer( Render::Geometry* geometry, Dali::Vector<uint16_t>& indices )
 412 {
 413   geometry->SetIndexBuffer( indices );
 414 }
 415
 416 void RenderManager::AddGeometry( OwnerPointer< Render::Geometry >& geometry )
 417 {
 418   mImpl->geometryContainer.PushBack( geometry.Release() );
 419 }
 420
 421 void RenderManager::RemoveGeometry( Render::Geometry* geometry )
 422 {
 423   mImpl->geometryContainer.EraseObject( geometry );
 424 }
 425
 426 void RenderManager::AttachVertexBuffer( Render::Geometry* geometry, Render::PropertyBuffer* propertyBuffer )
 427 {
 428   DALI_ASSERT_DEBUG( NULL != geometry );
 429
 430   // Find the geometry
 431   for ( auto&& iter : mImpl->geometryContainer )
 432   {
 433     if ( iter == geometry )
 434     {
 435       iter->AddPropertyBuffer( propertyBuffer );
 436       break;
 437     }
 438   }
 439 }
 440
 441 void RenderManager::RemoveVertexBuffer( Render::Geometry* geometry, Render::PropertyBuffer* propertyBuffer )
 442 {
 443   DALI_ASSERT_DEBUG( NULL != geometry );
 444
 445   // Find the geometry
 446   for ( auto&& iter : mImpl->geometryContainer )
 447   {
 448     if ( iter == geometry )
 449     {
 450       iter->RemovePropertyBuffer( propertyBuffer );
 451       break;
 452     }
 453   }
 454 }
 455
 456 void RenderManager::SetGeometryType( Render::Geometry* geometry, uint32_t geometryType )
 457 {
 458   geometry->SetType( Render::Geometry::Type(geometryType) );
 459 }
 460
 461 void RenderManager::AddRenderTracker( Render::RenderTracker* renderTracker )
 462 {
 463   mImpl->AddRenderTracker(renderTracker);
 464 }
 465
 466 void RenderManager::RemoveRenderTracker( Render::RenderTracker* renderTracker )
 467 {
 468   mImpl->RemoveRenderTracker(renderTracker);
 469 }
 470
 471 ProgramCache* RenderManager::GetProgramCache()
 472 {
 473   return &(mImpl->programController);
 474 }
 475
 476 void RenderManager::PreRender( Integration::RenderStatus& status, bool forceClear, bool uploadOnly )
 477 {
 478   DALI_PRINT_RENDER_START( mImpl->renderBufferIndex );
 479
 480   // Core::Render documents that GL context must be current before calling Render
 481   DALI_ASSERT_DEBUG( mImpl->context.IsGlContextCreated() );
 482
 483   // Increment the frame count at the beginning of each frame
 484   ++mImpl->frameCount;
 485
 486   // Process messages queued during previous update
 487   mImpl->renderQueue.ProcessMessages( mImpl->renderBufferIndex );
 488
 489   uint32_t count = 0u;
 490   for( uint32_t i = 0; i < mImpl->sceneContainer.size(); ++i )
 491   {
 492     count += mImpl->sceneContainer[i]->GetRenderInstructions().Count( mImpl->renderBufferIndex );
 493   }
 494
 495   const bool haveInstructions = count > 0u;
 496
 497   DALI_LOG_INFO( gLogFilter, Debug::General,
 498                  "Render: haveInstructions(%s) || mImpl->lastFrameWasRendered(%s) || forceClear(%s)\n",
 499                  haveInstructions ? "true" : "false",
 500                  mImpl->lastFrameWasRendered ? "true" : "false",
 501                  forceClear ? "true" : "false" );
 502
 503   // Only render if we have instructions to render, or the last frame was rendered (and therefore a clear is required).
 504   if( haveInstructions || mImpl->lastFrameWasRendered || forceClear )
 505   {
 506     DALI_LOG_INFO( gLogFilter, Debug::General, "Render: Processing\n" );
 507
 508     if ( !uploadOnly )
 509     {
 510       // Mark that we will require a post-render step to be performed (includes swap-buffers).
 511       status.SetNeedsPostRender( true );
 512     }
 513
 514     // Switch to the shared context
 515     if ( mImpl->currentContext != &mImpl->context )
 516     {
 517       mImpl->currentContext = &mImpl->context;
 518
 519       if ( mImpl->currentContext->IsSurfacelessContextSupported() )
 520       {
 521         mImpl->glContextHelperAbstraction.MakeSurfacelessContextCurrent();
 522       }
 523
 524       // Clear the current cached program when the context is switched
 525       mImpl->programController.ClearCurrentProgram();
 526     }
 527
 528     // Upload the geometries
 529     for( uint32_t i = 0; i < mImpl->sceneContainer.size(); ++i )
 530     {
 531       RenderInstructionContainer& instructions = mImpl->sceneContainer[i]->GetRenderInstructions();
 532       for ( uint32_t j = 0; j < instructions.Count( mImpl->renderBufferIndex ); ++j )
 533       {
 534         RenderInstruction& instruction = instructions.At( mImpl->renderBufferIndex, j );
 535
 536         const Matrix* viewMatrix       = instruction.GetViewMatrix( mImpl->renderBufferIndex );
 537         const Matrix* projectionMatrix = instruction.GetProjectionMatrix( mImpl->renderBufferIndex );
 538
 539         DALI_ASSERT_DEBUG( viewMatrix );
 540         DALI_ASSERT_DEBUG( projectionMatrix );
 541
 542         if( viewMatrix && projectionMatrix )
 543         {
 544           const RenderListContainer::SizeType renderListCount = instruction.RenderListCount();
 545
 546           // Iterate through each render list.
 547           for( RenderListContainer::SizeType index = 0; index < renderListCount; ++index )
 548           {
 549             const RenderList* renderList = instruction.GetRenderList( index );
 550
 551             if( renderList && !renderList->IsEmpty() )
 552             {
 553               const std::size_t itemCount = renderList->Count();
 554               for( uint32_t itemIndex = 0u; itemIndex < itemCount; ++itemIndex )
 555               {
 556                 const RenderItem& item = renderList->GetItem( itemIndex );
 557                 if( DALI_LIKELY( item.mRenderer ) )
 558                 {
 559                   item.mRenderer->Upload( *mImpl->currentContext );
 560                 }
 561               }
 562             }
 563           }
 564         }
 565       }
 566     }
 567   }
 568 }
 569
 570
 571 void RenderManager::RenderScene( Integration::Scene& scene, bool renderToFbo )
 572 {
 573   Internal::Scene& sceneInternal = GetImplementation( scene );
 574   SceneGraph::Scene* sceneObject = sceneInternal.GetSceneObject();
 575
 576   uint32_t count = sceneObject->GetRenderInstructions().Count( mImpl->renderBufferIndex );
 577
 578   for( uint32_t i = 0; i < count; ++i )
 579   {
 580     RenderInstruction& instruction = sceneObject->GetRenderInstructions().At( mImpl->renderBufferIndex, i );
 581
 582     if ( ( renderToFbo && !instruction.mFrameBuffer ) || ( !renderToFbo && instruction.mFrameBuffer ) )
 583     {
 584       continue; // skip
 585     }
 586
 587     Rect<int32_t> viewportRect;
 588     Vector4   clearColor;
 589
 590     if ( instruction.mIsClearColorSet )
 591     {
 592       clearColor = instruction.mClearColor;
 593     }
 594     else
 595     {
 596       clearColor = Dali::RenderTask::DEFAULT_CLEAR_COLOR;
 597     }
 598
 599     Rect<int32_t> surfaceRect = mImpl->defaultSurfaceRect;
 600     Integration::DepthBufferAvailable depthBufferAvailable = mImpl->depthBufferAvailable;
 601     Integration::StencilBufferAvailable stencilBufferAvailable = mImpl->stencilBufferAvailable;
 602     int surfaceOrientation = mImpl->defaultSurfaceOrientation;
 603
 604     if ( instruction.mFrameBuffer )
 605     {
 606       // offscreen buffer
 607       if ( mImpl->currentContext != &mImpl->context )
 608       {
 609         // Switch to shared context for off-screen buffer
 610         mImpl->currentContext = &mImpl->context;
 611
 612         if ( mImpl->currentContext->IsSurfacelessContextSupported() )
 613         {
 614           mImpl->glContextHelperAbstraction.MakeSurfacelessContextCurrent();
 615         }
 616
 617         // Clear the current cached program when the context is switched
 618         mImpl->programController.ClearCurrentProgram();
 619       }
 620     }
 621     else
 622     {
 623       if ( mImpl->currentContext->IsSurfacelessContextSupported() )
 624       {
 625         if ( mImpl->currentContext != sceneObject->GetContext() )
 626         {
 627           // Switch the correct context if rendering to a surface
 628           mImpl->currentContext = sceneObject->GetContext();
 629
 630           // Clear the current cached program when the context is switched
 631           mImpl->programController.ClearCurrentProgram();
 632         }
 633       }
 634
 635       surfaceRect = Rect<int32_t>( 0, 0, static_cast<int32_t>( scene.GetSize().width ), static_cast<int32_t>( scene.GetSize().height ) );
 636     }
 637
 638     DALI_ASSERT_DEBUG( mImpl->currentContext->IsGlContextCreated() );
 639
 640     // reset the program matrices for all programs once per frame
 641     // this ensures we will set view and projection matrix once per program per camera
 642     mImpl->programController.ResetProgramMatrices();
 643
 644     if( instruction.mFrameBuffer )
 645     {
 646       instruction.mFrameBuffer->Bind( *mImpl->currentContext );
 647
 648       // For each offscreen buffer, update the dependency list with the new texture id used by this frame buffer.
 649       for (unsigned int i0 = 0, i1 = instruction.mFrameBuffer->GetColorAttachmentCount(); i0 < i1; ++i0)
 650       {
 651         mImpl->textureDependencyList.PushBack( instruction.mFrameBuffer->GetTextureId(i0) );
 652       }
 653     }
 654     else
 655     {
 656       mImpl->currentContext->BindFramebuffer( GL_FRAMEBUFFER, 0u );
 657     }
 658
 659     if ( !instruction.mFrameBuffer )
 660     {
 661       mImpl->currentContext->Viewport( surfaceRect.x,
 662                                        surfaceRect.y,
 663                                        surfaceRect.width,
 664                                        surfaceRect.height );
 665     }
 666
 667     // Clear the entire color, depth and stencil buffers for the default framebuffer, if required.
 668     // It is important to clear all 3 buffers when they are being used, for performance on deferred renderers
 669     // e.g. previously when the depth & stencil buffers were NOT cleared, it caused the DDK to exceed a "vertex count limit",
 670     // and then stall. That problem is only noticeable when rendering a large number of vertices per frame.
 671     GLbitfield clearMask = GL_COLOR_BUFFER_BIT;
 672
 673     mImpl->currentContext->ColorMask( true );
 674
 675     if( depthBufferAvailable == Integration::DepthBufferAvailable::TRUE )
 676     {
 677       mImpl->currentContext->DepthMask( true );
 678       clearMask |= GL_DEPTH_BUFFER_BIT;
 679     }
 680
 681     if( stencilBufferAvailable == Integration::StencilBufferAvailable::TRUE)
 682     {
 683       mImpl->currentContext->ClearStencil( 0 );
 684       mImpl->currentContext->StencilMask( 0xFF ); // 8 bit stencil mask, all 1's
 685       clearMask |= GL_STENCIL_BUFFER_BIT;
 686     }
 687
 688     if( !instruction.mIgnoreRenderToFbo && ( instruction.mFrameBuffer != 0 ) )
 689     {
 690       // Offscreen buffer rendering
 691       if ( instruction.mIsViewportSet )
 692       {
 693         // For glViewport the lower-left corner is (0,0)
 694         const int32_t y = ( instruction.mFrameBuffer->GetHeight() - instruction.mViewport.height ) - instruction.mViewport.y;
 695         viewportRect.Set( instruction.mViewport.x,  y, instruction.mViewport.width, instruction.mViewport.height );
 696       }
 697       else
 698       {
 699         viewportRect.Set( 0, 0, instruction.mFrameBuffer->GetWidth(), instruction.mFrameBuffer->GetHeight() );
 700       }
 701       surfaceOrientation = 0;
 702     }
 703     else // No Offscreen frame buffer rendering
 704     {
 705       // Check whether a viewport is specified, otherwise the full surface size is used
 706       if ( instruction.mIsViewportSet )
 707       {
 708         // For glViewport the lower-left corner is (0,0)
 709         const int32_t y = ( surfaceRect.height - instruction.mViewport.height ) - instruction.mViewport.y;
 710         viewportRect.Set( instruction.mViewport.x,  y, instruction.mViewport.width, instruction.mViewport.height );
 711       }
 712       else
 713       {
 714         viewportRect = surfaceRect;
 715       }
 716     }
 717
 718     if( surfaceOrientation == 90 || surfaceOrientation == 270 )
 719     {
 720       int temp = viewportRect.width;
 721       viewportRect.width = viewportRect.height;
 722       viewportRect.height = temp;
 723     }
 724
 725     bool clearFullFrameRect = true;
 726     if( instruction.mFrameBuffer != 0 )
 727     {
 728       Viewport frameRect( 0, 0, instruction.mFrameBuffer->GetWidth(), instruction.mFrameBuffer->GetHeight() );
 729       clearFullFrameRect = ( frameRect == viewportRect );
 730     }
 731     else
 732     {
 733       clearFullFrameRect = ( surfaceRect == viewportRect );
 734     }
 735
 736     mImpl->currentContext->Viewport(viewportRect.x, viewportRect.y, viewportRect.width, viewportRect.height);
 737
 738     if( instruction.mIsClearColorSet )
 739     {
 740       mImpl->currentContext->ClearColor( clearColor.r,
 741                                          clearColor.g,
 742                                          clearColor.b,
 743                                          clearColor.a );
 744
 745       if( !clearFullFrameRect )
 746       {
 747         mImpl->currentContext->SetScissorTest( true );
 748         mImpl->currentContext->Scissor( viewportRect.x, viewportRect.y, viewportRect.width, viewportRect.height );
 749         mImpl->currentContext->Clear( clearMask, Context::FORCE_CLEAR );
 750         mImpl->currentContext->SetScissorTest( false );
 751       }
 752       else
 753       {
 754         mImpl->currentContext->SetScissorTest( false );
 755         mImpl->currentContext->Clear( clearMask, Context::FORCE_CLEAR );
 756       }
 757     }
 758
 759     // Clear the list of bound textures
 760     mImpl->boundTextures.Clear();
 761
 762     mImpl->renderAlgorithms.ProcessRenderInstruction(
 763         instruction,
 764         *mImpl->currentContext,
 765         mImpl->renderBufferIndex,
 766         depthBufferAvailable,
 767         stencilBufferAvailable,
 768         mImpl->boundTextures,
 769         surfaceOrientation );
 770
 771     // Synchronise the FBO/Texture access when there are multiple contexts
 772     if ( mImpl->currentContext->IsSurfacelessContextSupported() )
 773     {
 774       // Check whether any binded texture is in the dependency list
 775       bool textureFound = false;
 776
 777       if ( mImpl->boundTextures.Count() > 0u && mImpl->textureDependencyList.Count() > 0u )
 778       {
 779         for ( auto textureId : mImpl->textureDependencyList )
 780         {
 781
 782           textureFound = std::find_if( mImpl->boundTextures.Begin(), mImpl->boundTextures.End(),
 783                                        [textureId]( GLuint id )
 784                                        {
 785                                          return textureId == id;
 786                                        } ) != mImpl->boundTextures.End();
 787         }
 788       }
 789
 790       if ( textureFound )
 791       {
 792         if ( instruction.mFrameBuffer )
 793         {
 794           // For off-screen buffer
 795
 796           // Wait until all rendering calls for the currently context are executed
 797           mImpl->glContextHelperAbstraction.WaitClient();
 798
 799           // Clear the dependency list
 800           mImpl->textureDependencyList.Clear();
 801         }
 802         else
 803         {
 804           // Worker thread lambda function
 805           auto& glContextHelperAbstraction = mImpl->glContextHelperAbstraction;
 806           auto workerFunction = [&glContextHelperAbstraction]( int workerThread )
 807           {
 808             // Switch to the shared context in the worker thread
 809             glContextHelperAbstraction.MakeSurfacelessContextCurrent();
 810
 811             // Wait until all rendering calls for the shared context are executed
 812             glContextHelperAbstraction.WaitClient();
 813
 814             // Must clear the context in the worker thread
 815             // Otherwise the shared context cannot be switched to from the render thread
 816             glContextHelperAbstraction.MakeContextNull();
 817           };
 818
 819           auto future = mImpl->threadPool->SubmitTask( 0u, workerFunction );
 820           if ( future )
 821           {
 822             mImpl->threadPool->Wait();
 823
 824             // Clear the dependency list
 825             mImpl->textureDependencyList.Clear();
 826           }
 827         }
 828       }
 829     }
 830
 831     if( instruction.mRenderTracker && instruction.mFrameBuffer )
 832     {
 833       // This will create a sync object every frame this render tracker
 834       // is alive (though it should be now be created only for
 835       // render-once render tasks)
 836       instruction.mRenderTracker->CreateSyncObject( mImpl->glSyncAbstraction );
 837       instruction.mRenderTracker = nullptr; // Only create once.
 838     }
 839
 840     if ( renderToFbo )
 841     {
 842       mImpl->currentContext->Flush();
 843     }
 844   }
 845
 846   GLenum attachments[] = { GL_DEPTH, GL_STENCIL };
 847   mImpl->currentContext->InvalidateFramebuffer(GL_FRAMEBUFFER, 2, attachments);
 848 }
 849
 850 void RenderManager::PostRender( bool uploadOnly )
 851 {
 852   if ( !uploadOnly )
 853   {
 854     if ( mImpl->currentContext->IsSurfacelessContextSupported() )
 855     {
 856       mImpl->glContextHelperAbstraction.MakeSurfacelessContextCurrent();
 857     }
 858
 859     GLenum attachments[] = { GL_DEPTH, GL_STENCIL };
 860     mImpl->context.InvalidateFramebuffer(GL_FRAMEBUFFER, 2, attachments);
 861   }
 862
 863   //Notify RenderGeometries that rendering has finished
 864   for ( auto&& iter : mImpl->geometryContainer )
 865   {
 866     iter->OnRenderFinished();
 867   }
 868
 869   mImpl->UpdateTrackers();
 870
 871
 872   uint32_t count = 0u;
 873   for( uint32_t i = 0; i < mImpl->sceneContainer.size(); ++i )
 874   {
 875     count += mImpl->sceneContainer[i]->GetRenderInstructions().Count( mImpl->renderBufferIndex );
 876   }
 877
 878   const bool haveInstructions = count > 0u;
 879
 880   // If this frame was rendered due to instructions existing, we mark this so we know to clear the next frame.
 881   mImpl->lastFrameWasRendered = haveInstructions;
 882
 883   /**
 884    * The rendering has finished; swap to the next buffer.
 885    * Ideally the update has just finished using this buffer; otherwise the render thread
 886    * should block until the update has finished.
 887    */
 888   mImpl->renderBufferIndex = (0 != mImpl->renderBufferIndex) ? 0 : 1;
 889
 890   DALI_PRINT_RENDER_END();
 891 }
 892
 893 } // namespace SceneGraph
 894
 895 } // namespace Internal
 896
 897 } // namespace Dali