dali/internal/render/common/render-manager.cpp

   1 /*
   2  * Copyright (c) 2021 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/devel-api/threading/thread-pool.h>
  26 #include <dali/integration-api/core.h>
  27 #include <dali/integration-api/gl-context-helper-abstraction.h>
  28
  29 #include <dali/internal/event/common/scene-impl.h>
  30
  31 #include <dali/internal/update/common/scene-graph-scene.h>
  32 #include <dali/internal/update/render-tasks/scene-graph-camera.h>
  33
  34 #include <dali/internal/render/common/render-algorithms.h>
  35 #include <dali/internal/render/common/render-debug.h>
  36 #include <dali/internal/render/common/render-instruction.h>
  37 #include <dali/internal/render/common/render-tracker.h>
  38 #include <dali/internal/render/queue/render-queue.h>
  39 #include <dali/internal/render/renderers/render-frame-buffer.h>
  40 #include <dali/internal/render/renderers/render-texture.h>
  41 #include <dali/internal/render/renderers/shader-cache.h>
  42 #include <dali/internal/render/renderers/uniform-buffer-manager.h>
  43 #include <dali/internal/render/shaders/program-controller.h>
  44
  45 namespace Dali
  46 {
  47 namespace Internal
  48 {
  49 namespace SceneGraph
  50 {
  51 #if defined(DEBUG_ENABLED)
  52 namespace
  53 {
  54 Debug::Filter* gLogFilter = Debug::Filter::New(Debug::NoLogging, false, "LOG_RENDER_MANAGER");
  55 } // unnamed namespace
  56 #endif
  57
  58 /**
  59  * Structure to contain internal data
  60  */
  61 struct RenderManager::Impl
  62 {
  63   Impl(Graphics::Controller&               graphicsController,
  64        Integration::DepthBufferAvailable   depthBufferAvailableParam,
  65        Integration::StencilBufferAvailable stencilBufferAvailableParam,
  66        Integration::PartialUpdateAvailable partialUpdateAvailableParam)
  67   : context(graphicsController.GetGlAbstraction(), &sceneContextContainer),
  68     currentContext(&context),
  69     graphicsController(graphicsController),
  70     renderQueue(),
  71     renderAlgorithms(graphicsController),
  72     frameCount(0u),
  73     renderBufferIndex(SceneGraphBuffers::INITIAL_UPDATE_BUFFER_INDEX),
  74     rendererContainer(),
  75     samplerContainer(),
  76     textureContainer(),
  77     frameBufferContainer(),
  78     lastFrameWasRendered(false),
  79     programController(graphicsController),
  80     shaderCache(graphicsController),
  81     depthBufferAvailable(depthBufferAvailableParam),
  82     stencilBufferAvailable(stencilBufferAvailableParam),
  83     partialUpdateAvailable(partialUpdateAvailableParam)
  84   {
  85     // Create thread pool with just one thread ( there may be a need to create more threads in the future ).
  86     threadPool = std::unique_ptr<Dali::ThreadPool>(new Dali::ThreadPool());
  87     threadPool->Initialize(1u);
  88
  89     uniformBufferManager.reset(new Render::UniformBufferManager(&graphicsController));
  90
  91     // initialize main command buffer
  92     auto info         = Graphics::CommandBufferCreateInfo().SetLevel(Graphics::CommandBufferLevel::PRIMARY);
  93     mainCommandBuffer = graphicsController.CreateCommandBuffer(info, nullptr);
  94   }
  95
  96   ~Impl()
  97   {
  98     threadPool.reset(nullptr); // reset now to maintain correct destruction order
  99   }
 100
 101   void AddRenderTracker(Render::RenderTracker* renderTracker)
 102   {
 103     DALI_ASSERT_DEBUG(renderTracker != NULL);
 104     mRenderTrackers.PushBack(renderTracker);
 105   }
 106
 107   void RemoveRenderTracker(Render::RenderTracker* renderTracker)
 108   {
 109     mRenderTrackers.EraseObject(renderTracker);
 110   }
 111
 112   Context* CreateSceneContext()
 113   {
 114     Context* context = new Context(graphicsController.GetGlAbstraction());
 115     sceneContextContainer.PushBack(context);
 116     return context;
 117   }
 118
 119   void DestroySceneContext(Context* sceneContext)
 120   {
 121     auto iter = std::find(sceneContextContainer.Begin(), sceneContextContainer.End(), sceneContext);
 122     if(iter != sceneContextContainer.End())
 123     {
 124       (*iter)->GlContextDestroyed();
 125       sceneContextContainer.Erase(iter);
 126     }
 127   }
 128
 129   Context* ReplaceSceneContext(Context* oldSceneContext)
 130   {
 131     Context* newContext = new Context(graphicsController.GetGlAbstraction());
 132
 133     oldSceneContext->GlContextDestroyed();
 134
 135     std::replace(sceneContextContainer.begin(), sceneContextContainer.end(), oldSceneContext, newContext);
 136     return newContext;
 137   }
 138
 139   void UpdateTrackers()
 140   {
 141     for(auto&& iter : mRenderTrackers)
 142     {
 143       iter->PollSyncObject();
 144     }
 145   }
 146
 147   // the order is important for destruction,
 148   // programs are owned by context at the moment.
 149   Context                  context;               ///< Holds the GL state of the share resource context
 150   Context*                 currentContext;        ///< Holds the GL state of the current context for rendering
 151   OwnerContainer<Context*> sceneContextContainer; ///< List of owned contexts holding the GL state per scene
 152   Graphics::Controller&    graphicsController;
 153   RenderQueue              renderQueue; ///< A message queue for receiving messages from the update-thread.
 154
 155   std::vector<SceneGraph::Scene*> sceneContainer; ///< List of pointers to the scene graph objects of the scenes
 156
 157   Render::RenderAlgorithms renderAlgorithms; ///< The RenderAlgorithms object is used to action the renders required by a RenderInstruction
 158
 159   uint32_t    frameCount;        ///< The current frame count
 160   BufferIndex renderBufferIndex; ///< The index of the buffer to read from; this is opposite of the "update" buffer
 161
 162   OwnerContainer<Render::Renderer*>     rendererContainer;     ///< List of owned renderers
 163   OwnerContainer<Render::Sampler*>      samplerContainer;      ///< List of owned samplers
 164   OwnerContainer<Render::Texture*>      textureContainer;      ///< List of owned textures
 165   OwnerContainer<Render::FrameBuffer*>  frameBufferContainer;  ///< List of owned framebuffers
 166   OwnerContainer<Render::VertexBuffer*> vertexBufferContainer; ///< List of owned vertex buffers
 167   OwnerContainer<Render::Geometry*>     geometryContainer;     ///< List of owned Geometries
 168
 169   bool lastFrameWasRendered; ///< Keeps track of the last frame being rendered due to having render instructions
 170
 171   OwnerContainer<Render::RenderTracker*> mRenderTrackers; ///< List of render trackers
 172
 173   ProgramController   programController; ///< Owner of the GL programs
 174   Render::ShaderCache shaderCache;       ///< The cache for the graphics shaders
 175
 176   std::unique_ptr<Render::UniformBufferManager> uniformBufferManager; ///< The uniform buffer manager
 177
 178   Integration::DepthBufferAvailable   depthBufferAvailable;   ///< Whether the depth buffer is available
 179   Integration::StencilBufferAvailable stencilBufferAvailable; ///< Whether the stencil buffer is available
 180   Integration::PartialUpdateAvailable partialUpdateAvailable; ///< Whether the partial update is available
 181
 182   std::unique_ptr<Dali::ThreadPool> threadPool;            ///< The thread pool
 183   Vector<Graphics::Texture*>        boundTextures;         ///< The textures bound for rendering
 184   Vector<Graphics::Texture*>        textureDependencyList; ///< The dependency list of binded textures
 185
 186   Graphics::UniquePtr<Graphics::CommandBuffer> mainCommandBuffer; ///< Main command buffer
 187
 188   Graphics::UniquePtr<Graphics::RenderPass> mainRenderPass; ///< Main renderpass
 189 };
 190
 191 RenderManager* RenderManager::New(Graphics::Controller&               graphicsController,
 192                                   Integration::DepthBufferAvailable   depthBufferAvailable,
 193                                   Integration::StencilBufferAvailable stencilBufferAvailable,
 194                                   Integration::PartialUpdateAvailable partialUpdateAvailable)
 195 {
 196   RenderManager* manager = new RenderManager;
 197   manager->mImpl         = new Impl(graphicsController,
 198                             depthBufferAvailable,
 199                             stencilBufferAvailable,
 200                             partialUpdateAvailable);
 201   return manager;
 202 }
 203
 204 RenderManager::RenderManager()
 205 : mImpl(nullptr)
 206 {
 207 }
 208
 209 RenderManager::~RenderManager()
 210 {
 211   delete mImpl;
 212 }
 213
 214 RenderQueue& RenderManager::GetRenderQueue()
 215 {
 216   return mImpl->renderQueue;
 217 }
 218
 219 void RenderManager::ContextCreated()
 220 {
 221   mImpl->context.GlContextCreated();
 222   mImpl->programController.GlContextCreated();
 223
 224   // renderers, textures and gpu buffers cannot reinitialize themselves
 225   // so they rely on someone reloading the data for them
 226 }
 227
 228 void RenderManager::ContextDestroyed()
 229 {
 230   mImpl->context.GlContextDestroyed();
 231   mImpl->programController.GlContextDestroyed();
 232
 233   //Inform textures
 234   for(auto&& texture : mImpl->textureContainer)
 235   {
 236     texture->Destroy();
 237   }
 238
 239   //Inform framebuffers
 240   for(auto&& framebuffer : mImpl->frameBufferContainer)
 241   {
 242     framebuffer->Destroy();
 243   }
 244
 245   // inform renderers
 246   for(auto&& renderer : mImpl->rendererContainer)
 247   {
 248     renderer->GlContextDestroyed();
 249   }
 250
 251   // inform context
 252   for(auto&& context : mImpl->sceneContextContainer)
 253   {
 254     context->GlContextDestroyed();
 255   }
 256 }
 257
 258 void RenderManager::SetShaderSaver(ShaderSaver& upstream)
 259 {
 260   mImpl->programController.SetShaderSaver(upstream);
 261 }
 262
 263 void RenderManager::AddRenderer(OwnerPointer<Render::Renderer>& renderer)
 264 {
 265   // Initialize the renderer as we are now in render thread
 266   renderer->Initialize(mImpl->context, mImpl->graphicsController, mImpl->programController, mImpl->shaderCache, *(mImpl->uniformBufferManager.get()));
 267
 268   mImpl->rendererContainer.PushBack(renderer.Release());
 269 }
 270
 271 void RenderManager::RemoveRenderer(Render::Renderer* renderer)
 272 {
 273   mImpl->rendererContainer.EraseObject(renderer);
 274 }
 275
 276 void RenderManager::AddSampler(OwnerPointer<Render::Sampler>& sampler)
 277 {
 278   sampler->Initialize(mImpl->graphicsController);
 279   mImpl->samplerContainer.PushBack(sampler.Release());
 280 }
 281
 282 void RenderManager::RemoveSampler(Render::Sampler* sampler)
 283 {
 284   mImpl->samplerContainer.EraseObject(sampler);
 285 }
 286
 287 void RenderManager::AddTexture(OwnerPointer<Render::Texture>& texture)
 288 {
 289   texture->Initialize(mImpl->graphicsController);
 290   mImpl->textureContainer.PushBack(texture.Release());
 291 }
 292
 293 void RenderManager::RemoveTexture(Render::Texture* texture)
 294 {
 295   DALI_ASSERT_DEBUG(NULL != texture);
 296
 297   // Find the texture, use reference to pointer so we can do the erase safely
 298   for(auto&& iter : mImpl->textureContainer)
 299   {
 300     if(iter == texture)
 301     {
 302       texture->Destroy();
 303       mImpl->textureContainer.Erase(&iter); // Texture found; now destroy it
 304       return;
 305     }
 306   }
 307 }
 308
 309 void RenderManager::UploadTexture(Render::Texture* texture, PixelDataPtr pixelData, const Texture::UploadParams& params)
 310 {
 311   texture->Upload(pixelData, params);
 312 }
 313
 314 void RenderManager::GenerateMipmaps(Render::Texture* texture)
 315 {
 316   texture->GenerateMipmaps();
 317 }
 318
 319 void RenderManager::SetFilterMode(Render::Sampler* sampler, uint32_t minFilterMode, uint32_t magFilterMode)
 320 {
 321   sampler->SetFilterMode(static_cast<Dali::FilterMode::Type>(minFilterMode),
 322                          static_cast<Dali::FilterMode::Type>(magFilterMode));
 323 }
 324
 325 void RenderManager::SetWrapMode(Render::Sampler* sampler, uint32_t rWrapMode, uint32_t sWrapMode, uint32_t tWrapMode)
 326 {
 327   sampler->SetWrapMode(static_cast<Dali::WrapMode::Type>(rWrapMode),
 328                        static_cast<Dali::WrapMode::Type>(sWrapMode),
 329                        static_cast<Dali::WrapMode::Type>(tWrapMode));
 330 }
 331
 332 void RenderManager::AddFrameBuffer(OwnerPointer<Render::FrameBuffer>& frameBuffer)
 333 {
 334   Render::FrameBuffer* frameBufferPtr = frameBuffer.Release();
 335   mImpl->frameBufferContainer.PushBack(frameBufferPtr);
 336   frameBufferPtr->Initialize(mImpl->graphicsController);
 337 }
 338
 339 void RenderManager::RemoveFrameBuffer(Render::FrameBuffer* frameBuffer)
 340 {
 341   DALI_ASSERT_DEBUG(NULL != frameBuffer);
 342
 343   // Find the sampler, use reference so we can safely do the erase
 344   for(auto&& iter : mImpl->frameBufferContainer)
 345   {
 346     if(iter == frameBuffer)
 347     {
 348       frameBuffer->Destroy();
 349       mImpl->frameBufferContainer.Erase(&iter); // frameBuffer found; now destroy it
 350
 351       break;
 352     }
 353   }
 354 }
 355
 356 void RenderManager::InitializeScene(SceneGraph::Scene* scene)
 357 {
 358   scene->Initialize(*mImpl->CreateSceneContext(), mImpl->graphicsController);
 359   mImpl->sceneContainer.push_back(scene);
 360 }
 361
 362 void RenderManager::UninitializeScene(SceneGraph::Scene* scene)
 363 {
 364   mImpl->DestroySceneContext(scene->GetContext());
 365
 366   auto iter = std::find(mImpl->sceneContainer.begin(), mImpl->sceneContainer.end(), scene);
 367   if(iter != mImpl->sceneContainer.end())
 368   {
 369     mImpl->sceneContainer.erase(iter);
 370   }
 371 }
 372
 373 void RenderManager::SurfaceReplaced(SceneGraph::Scene* scene)
 374 {
 375   Context* newContext = mImpl->ReplaceSceneContext(scene->GetContext());
 376   scene->Initialize(*newContext, mImpl->graphicsController);
 377 }
 378
 379 void RenderManager::AttachColorTextureToFrameBuffer(Render::FrameBuffer* frameBuffer, Render::Texture* texture, uint32_t mipmapLevel, uint32_t layer)
 380 {
 381   frameBuffer->AttachColorTexture(texture, mipmapLevel, layer);
 382 }
 383
 384 void RenderManager::AttachDepthTextureToFrameBuffer(Render::FrameBuffer* frameBuffer, Render::Texture* texture, uint32_t mipmapLevel)
 385 {
 386   frameBuffer->AttachDepthTexture(texture, mipmapLevel);
 387 }
 388
 389 void RenderManager::AttachDepthStencilTextureToFrameBuffer(Render::FrameBuffer* frameBuffer, Render::Texture* texture, uint32_t mipmapLevel)
 390 {
 391   frameBuffer->AttachDepthStencilTexture(texture, mipmapLevel);
 392 }
 393
 394 void RenderManager::AddVertexBuffer(OwnerPointer<Render::VertexBuffer>& vertexBuffer)
 395 {
 396   mImpl->vertexBufferContainer.PushBack(vertexBuffer.Release());
 397 }
 398
 399 void RenderManager::RemoveVertexBuffer(Render::VertexBuffer* vertexBuffer)
 400 {
 401   mImpl->vertexBufferContainer.EraseObject(vertexBuffer);
 402 }
 403
 404 void RenderManager::SetVertexBufferFormat(Render::VertexBuffer* vertexBuffer, OwnerPointer<Render::VertexBuffer::Format>& format)
 405 {
 406   vertexBuffer->SetFormat(format.Release());
 407 }
 408
 409 void RenderManager::SetVertexBufferData(Render::VertexBuffer* vertexBuffer, OwnerPointer<Vector<uint8_t>>& data, uint32_t size)
 410 {
 411   vertexBuffer->SetData(data.Release(), size);
 412 }
 413
 414 void RenderManager::SetIndexBuffer(Render::Geometry* geometry, Dali::Vector<uint16_t>& indices)
 415 {
 416   geometry->SetIndexBuffer(indices);
 417 }
 418
 419 void RenderManager::AddGeometry(OwnerPointer<Render::Geometry>& geometry)
 420 {
 421   mImpl->geometryContainer.PushBack(geometry.Release());
 422 }
 423
 424 void RenderManager::RemoveGeometry(Render::Geometry* geometry)
 425 {
 426   mImpl->geometryContainer.EraseObject(geometry);
 427 }
 428
 429 void RenderManager::AttachVertexBuffer(Render::Geometry* geometry, Render::VertexBuffer* vertexBuffer)
 430 {
 431   DALI_ASSERT_DEBUG(NULL != geometry);
 432
 433   // Find the geometry
 434   for(auto&& iter : mImpl->geometryContainer)
 435   {
 436     if(iter == geometry)
 437     {
 438       iter->AddVertexBuffer(vertexBuffer);
 439       break;
 440     }
 441   }
 442 }
 443
 444 void RenderManager::RemoveVertexBuffer(Render::Geometry* geometry, Render::VertexBuffer* vertexBuffer)
 445 {
 446   DALI_ASSERT_DEBUG(NULL != geometry);
 447
 448   // Find the geometry
 449   for(auto&& iter : mImpl->geometryContainer)
 450   {
 451     if(iter == geometry)
 452     {
 453       iter->RemoveVertexBuffer(vertexBuffer);
 454       break;
 455     }
 456   }
 457 }
 458
 459 void RenderManager::SetGeometryType(Render::Geometry* geometry, uint32_t geometryType)
 460 {
 461   geometry->SetType(Render::Geometry::Type(geometryType));
 462 }
 463
 464 void RenderManager::AddRenderTracker(Render::RenderTracker* renderTracker)
 465 {
 466   mImpl->AddRenderTracker(renderTracker);
 467 }
 468
 469 void RenderManager::RemoveRenderTracker(Render::RenderTracker* renderTracker)
 470 {
 471   mImpl->RemoveRenderTracker(renderTracker);
 472 }
 473
 474 ProgramCache* RenderManager::GetProgramCache()
 475 {
 476   return &(mImpl->programController);
 477 }
 478
 479 void RenderManager::PreRender(Integration::RenderStatus& status, bool forceClear, bool uploadOnly)
 480 {
 481   DALI_PRINT_RENDER_START(mImpl->renderBufferIndex);
 482
 483   // Core::Render documents that GL context must be current before calling Render
 484   DALI_ASSERT_DEBUG(mImpl->context.IsGlContextCreated());
 485
 486   // Increment the frame count at the beginning of each frame
 487   ++mImpl->frameCount;
 488
 489   // Process messages queued during previous update
 490   mImpl->renderQueue.ProcessMessages(mImpl->renderBufferIndex);
 491
 492   uint32_t count = 0u;
 493   for(uint32_t i = 0; i < mImpl->sceneContainer.size(); ++i)
 494   {
 495     count += mImpl->sceneContainer[i]->GetRenderInstructions().Count(mImpl->renderBufferIndex);
 496   }
 497
 498   const bool haveInstructions = count > 0u;
 499
 500   // Reset main command buffer
 501   mImpl->mainCommandBuffer->Reset();
 502
 503   DALI_LOG_INFO(gLogFilter, Debug::General, "Render: haveInstructions(%s) || mImpl->lastFrameWasRendered(%s) || forceClear(%s)\n", haveInstructions ? "true" : "false", mImpl->lastFrameWasRendered ? "true" : "false", forceClear ? "true" : "false");
 504
 505   // Only render if we have instructions to render, or the last frame was rendered (and therefore a clear is required).
 506   if(haveInstructions || mImpl->lastFrameWasRendered || forceClear)
 507   {
 508     DALI_LOG_INFO(gLogFilter, Debug::General, "Render: Processing\n");
 509
 510     // Switch to the shared context
 511     if(mImpl->currentContext != &mImpl->context)
 512     {
 513       mImpl->currentContext = &mImpl->context;
 514
 515       // Context switch now happens when the uploading happens in graphics side
 516       //      if(mImpl->currentContext->IsSurfacelessContextSupported())
 517       //      {
 518       //        mImpl->graphicsController.GetGlContextHelperAbstraction().MakeSurfacelessContextCurrent();
 519       //      }
 520
 521       // Clear the current cached program when the context is switched
 522       mImpl->programController.ClearCurrentProgram();
 523     }
 524
 525     // Upload the geometries
 526     for(uint32_t i = 0; i < mImpl->sceneContainer.size(); ++i)
 527     {
 528       RenderInstructionContainer& instructions = mImpl->sceneContainer[i]->GetRenderInstructions();
 529       for(uint32_t j = 0; j < instructions.Count(mImpl->renderBufferIndex); ++j)
 530       {
 531         RenderInstruction& instruction = instructions.At(mImpl->renderBufferIndex, j);
 532
 533         const Matrix* viewMatrix       = instruction.GetViewMatrix(mImpl->renderBufferIndex);
 534         const Matrix* projectionMatrix = instruction.GetProjectionMatrix(mImpl->renderBufferIndex);
 535
 536         DALI_ASSERT_DEBUG(viewMatrix);
 537         DALI_ASSERT_DEBUG(projectionMatrix);
 538
 539         if(viewMatrix && projectionMatrix)
 540         {
 541           const RenderListContainer::SizeType renderListCount = instruction.RenderListCount();
 542
 543           // Iterate through each render list.
 544           for(RenderListContainer::SizeType index = 0; index < renderListCount; ++index)
 545           {
 546             const RenderList* renderList = instruction.GetRenderList(index);
 547
 548             if(renderList && !renderList->IsEmpty())
 549             {
 550               const std::size_t itemCount = renderList->Count();
 551               for(uint32_t itemIndex = 0u; itemIndex < itemCount; ++itemIndex)
 552               {
 553                 const RenderItem& item = renderList->GetItem(itemIndex);
 554                 if(DALI_LIKELY(item.mRenderer))
 555                 {
 556                   item.mRenderer->Upload();
 557                 }
 558               }
 559             }
 560           }
 561         }
 562       }
 563     }
 564   }
 565 }
 566
 567 void RenderManager::PreRender(Integration::Scene& scene, std::vector<Rect<int>>& damagedRects)
 568 {
 569   if(mImpl->partialUpdateAvailable != Integration::PartialUpdateAvailable::TRUE)
 570   {
 571     return;
 572   }
 573
 574   Internal::Scene&   sceneInternal = GetImplementation(scene);
 575   SceneGraph::Scene* sceneObject   = sceneInternal.GetSceneObject();
 576
 577   if(sceneObject->IsRenderingSkipped())
 578   {
 579     // We don't need to calculate dirty rects
 580     return;
 581   }
 582
 583   class DamagedRectsCleaner
 584   {
 585   public:
 586     DamagedRectsCleaner(std::vector<Rect<int>>& damagedRects)
 587     : mDamagedRects(damagedRects),
 588       mCleanOnReturn(true)
 589     {
 590     }
 591
 592     void SetCleanOnReturn(bool cleanOnReturn)
 593     {
 594       mCleanOnReturn = cleanOnReturn;
 595     }
 596
 597     ~DamagedRectsCleaner()
 598     {
 599       if(mCleanOnReturn)
 600       {
 601         mDamagedRects.clear();
 602       }
 603     }
 604
 605   private:
 606     std::vector<Rect<int>>& mDamagedRects;
 607     bool                    mCleanOnReturn;
 608   };
 609
 610   Rect<int32_t> surfaceRect = sceneObject->GetSurfaceRect();
 611
 612   // Clean collected dirty/damaged rects on exit if 3d layer or 3d node or other conditions.
 613   DamagedRectsCleaner damagedRectCleaner(damagedRects);
 614
 615   // Mark previous dirty rects in the sorted array. The array is already sorted by node and renderer, frame number.
 616   // so you don't need to sort: std::stable_sort(itemsDirtyRects.begin(), itemsDirtyRects.end());
 617   std::vector<DirtyRect>& itemsDirtyRects = sceneInternal.GetItemsDirtyRects();
 618   for(DirtyRect& dirtyRect : itemsDirtyRects)
 619   {
 620     dirtyRect.visited = false;
 621   }
 622
 623   uint32_t count = sceneObject->GetRenderInstructions().Count(mImpl->renderBufferIndex);
 624   for(uint32_t i = 0; i < count; ++i)
 625   {
 626     RenderInstruction& instruction = sceneObject->GetRenderInstructions().At(mImpl->renderBufferIndex, i);
 627
 628     if(instruction.mFrameBuffer)
 629     {
 630       return; // TODO: reset, we don't deal with render tasks with framebuffers (for now)
 631     }
 632
 633     const Camera* camera = instruction.GetCamera();
 634     if(camera->mType == Camera::DEFAULT_TYPE && camera->mTargetPosition == Camera::DEFAULT_TARGET_POSITION)
 635     {
 636       const Node* node = instruction.GetCamera()->GetNode();
 637       if(node)
 638       {
 639         Vector3    position;
 640         Vector3    scale;
 641         Quaternion orientation;
 642         node->GetWorldMatrix(mImpl->renderBufferIndex).GetTransformComponents(position, orientation, scale);
 643
 644         Vector3 orientationAxis;
 645         Radian  orientationAngle;
 646         orientation.ToAxisAngle(orientationAxis, orientationAngle);
 647
 648         if(position.x > Math::MACHINE_EPSILON_10000 ||
 649            position.y > Math::MACHINE_EPSILON_10000 ||
 650            orientationAxis != Vector3(0.0f, 1.0f, 0.0f) ||
 651            orientationAngle != ANGLE_180 ||
 652            scale != Vector3(1.0f, 1.0f, 1.0f))
 653         {
 654           return;
 655         }
 656       }
 657     }
 658     else
 659     {
 660       return;
 661     }
 662
 663     Rect<int32_t> viewportRect;
 664     if(instruction.mIsViewportSet)
 665     {
 666       const int32_t y = (surfaceRect.height - instruction.mViewport.height) - instruction.mViewport.y;
 667       viewportRect.Set(instruction.mViewport.x, y, instruction.mViewport.width, instruction.mViewport.height);
 668       if(viewportRect.IsEmpty() || !viewportRect.IsValid())
 669       {
 670         return; // just skip funny use cases for now, empty viewport means it is set somewhere else
 671       }
 672     }
 673     else
 674     {
 675       viewportRect = surfaceRect;
 676     }
 677
 678     const Matrix* viewMatrix       = instruction.GetViewMatrix(mImpl->renderBufferIndex);
 679     const Matrix* projectionMatrix = instruction.GetProjectionMatrix(mImpl->renderBufferIndex);
 680     if(viewMatrix && projectionMatrix)
 681     {
 682       const RenderListContainer::SizeType count = instruction.RenderListCount();
 683       for(RenderListContainer::SizeType index = 0u; index < count; ++index)
 684       {
 685         const RenderList* renderList = instruction.GetRenderList(index);
 686         if(renderList && !renderList->IsEmpty())
 687         {
 688           const std::size_t count = renderList->Count();
 689           for(uint32_t index = 0u; index < count; ++index)
 690           {
 691             RenderItem& item = renderList->GetItem(index);
 692             // If the item does 3D transformation, do early exit and clean the damaged rect array
 693             if(item.mUpdateSize == Vector3::ZERO)
 694             {
 695               return;
 696             }
 697
 698             Rect<int> rect;
 699             DirtyRect dirtyRect(item.mNode, item.mRenderer, mImpl->frameCount, rect);
 700             // If the item refers to updated node or renderer.
 701             if(item.mIsUpdated ||
 702                (item.mNode &&
 703                 (item.mNode->Updated() || (item.mRenderer && item.mRenderer->Updated(mImpl->renderBufferIndex, item.mNode)))))
 704             {
 705               item.mIsUpdated = false;
 706               item.mNode->SetUpdated(false);
 707
 708               rect = item.CalculateViewportSpaceAABB(item.mUpdateSize, viewportRect.width, viewportRect.height);
 709               if(rect.IsValid() && rect.Intersect(viewportRect) && !rect.IsEmpty())
 710               {
 711                 const int left   = rect.x;
 712                 const int top    = rect.y;
 713                 const int right  = rect.x + rect.width;
 714                 const int bottom = rect.y + rect.height;
 715                 rect.x           = (left / 16) * 16;
 716                 rect.y           = (top / 16) * 16;
 717                 rect.width       = ((right + 16) / 16) * 16 - rect.x;
 718                 rect.height      = ((bottom + 16) / 16) * 16 - rect.y;
 719
 720                 // Found valid dirty rect.
 721                 // 1. Insert it in the sorted array of the dirty rects.
 722                 // 2. Mark the related dirty rects as visited so they will not be removed below.
 723                 // 3. Keep only last 3 dirty rects for the same node and renderer (Tizen uses 3 back buffers, Ubuntu 1).
 724                 dirtyRect.rect    = rect;
 725                 auto dirtyRectPos = std::lower_bound(itemsDirtyRects.begin(), itemsDirtyRects.end(), dirtyRect);
 726                 dirtyRectPos      = itemsDirtyRects.insert(dirtyRectPos, dirtyRect);
 727
 728                 int c = 1;
 729                 while(++dirtyRectPos != itemsDirtyRects.end())
 730                 {
 731                   if(dirtyRectPos->node != item.mNode || dirtyRectPos->renderer != item.mRenderer)
 732                   {
 733                     break;
 734                   }
 735
 736                   dirtyRectPos->visited = true;
 737                   Rect<int>& dirtRect   = dirtyRectPos->rect;
 738                   rect.Merge(dirtRect);
 739
 740                   c++;
 741                   if(c > 3) // no more then 3 previous rects
 742                   {
 743                     itemsDirtyRects.erase(dirtyRectPos);
 744                     break;
 745                   }
 746                 }
 747
 748                 damagedRects.push_back(rect);
 749               }
 750             }
 751             else
 752             {
 753               // 1. The item is not dirty, the node and renderer referenced by the item are still exist.
 754               // 2. Mark the related dirty rects as visited so they will not be removed below.
 755               auto dirtyRectPos = std::lower_bound(itemsDirtyRects.begin(), itemsDirtyRects.end(), dirtyRect);
 756               while(dirtyRectPos != itemsDirtyRects.end())
 757               {
 758                 if(dirtyRectPos->node != item.mNode || dirtyRectPos->renderer != item.mRenderer)
 759                 {
 760                   break;
 761                 }
 762
 763                 dirtyRectPos->visited = true;
 764                 dirtyRectPos++;
 765               }
 766             }
 767           }
 768         }
 769       }
 770     }
 771   }
 772
 773   // Check removed nodes or removed renderers dirty rects
 774   auto i = itemsDirtyRects.begin();
 775   auto j = itemsDirtyRects.begin();
 776   while(i != itemsDirtyRects.end())
 777   {
 778     if(i->visited)
 779     {
 780       *j++ = *i;
 781     }
 782     else
 783     {
 784       Rect<int>& dirtRect = i->rect;
 785       damagedRects.push_back(dirtRect);
 786     }
 787     i++;
 788   }
 789
 790   itemsDirtyRects.resize(j - itemsDirtyRects.begin());
 791   damagedRectCleaner.SetCleanOnReturn(false);
 792 }
 793
 794 void RenderManager::RenderScene(Integration::RenderStatus& status, Integration::Scene& scene, bool renderToFbo)
 795 {
 796   Rect<int> clippingRect;
 797   RenderScene(status, scene, renderToFbo, clippingRect);
 798 }
 799
 800 void RenderManager::RenderScene(Integration::RenderStatus& status, Integration::Scene& scene, bool renderToFbo, Rect<int>& clippingRect)
 801 {
 802   // Reset main algorithms command buffer
 803   mImpl->renderAlgorithms.ResetCommandBuffer();
 804
 805   auto mainCommandBuffer = mImpl->renderAlgorithms.GetMainCommandBuffer();
 806
 807   Internal::Scene&   sceneInternal = GetImplementation(scene);
 808   SceneGraph::Scene* sceneObject   = sceneInternal.GetSceneObject();
 809
 810   uint32_t count = sceneObject->GetRenderInstructions().Count(mImpl->renderBufferIndex);
 811
 812   for(uint32_t i = 0; i < count; ++i)
 813   {
 814     RenderInstruction& instruction = sceneObject->GetRenderInstructions().At(mImpl->renderBufferIndex, i);
 815
 816     if((renderToFbo && !instruction.mFrameBuffer) || (!renderToFbo && instruction.mFrameBuffer))
 817     {
 818       continue; // skip
 819     }
 820
 821     // Mark that we will require a post-render step to be performed (includes swap-buffers).
 822     status.SetNeedsPostRender(true);
 823
 824     Rect<int32_t> viewportRect;
 825     Vector4       clearColor;
 826
 827     if(instruction.mIsClearColorSet)
 828     {
 829       clearColor = instruction.mClearColor;
 830     }
 831     else
 832     {
 833       clearColor = Dali::RenderTask::DEFAULT_CLEAR_COLOR;
 834     }
 835
 836     Rect<int32_t> surfaceRect        = sceneObject->GetSurfaceRect();
 837     int32_t       surfaceOrientation = sceneObject->GetSurfaceOrientation();
 838
 839     Integration::DepthBufferAvailable   depthBufferAvailable   = mImpl->depthBufferAvailable;
 840     Integration::StencilBufferAvailable stencilBufferAvailable = mImpl->stencilBufferAvailable;
 841
 842     if(instruction.mFrameBuffer)
 843     {
 844       // Ensure graphics framebuffer is created, bind atachments and create render passes
 845       // Only happens once per framebuffer. If the create fails, e.g. no attachments yet,
 846       // then don't render to this framebuffer.
 847       if(!instruction.mFrameBuffer->GetGraphicsObject())
 848       {
 849         const bool created = instruction.mFrameBuffer->CreateGraphicsObjects();
 850         if(!created)
 851         {
 852           continue;
 853         }
 854       }
 855
 856       auto& clearValues = instruction.mFrameBuffer->GetGraphicsRenderPassClearValues();
 857
 858       // Set the clear color for first color attachment
 859       if(instruction.mIsClearColorSet && clearValues.size() > 0)
 860       {
 861         clearValues[0].color = {
 862           instruction.mClearColor.r,
 863           instruction.mClearColor.g,
 864           instruction.mClearColor.b,
 865           instruction.mClearColor.a};
 866       }
 867       auto loadOp = instruction.mIsClearColorSet ? Graphics::AttachmentLoadOp::CLEAR : Graphics::AttachmentLoadOp::LOAD;
 868
 869       // offscreen buffer
 870       mainCommandBuffer->BeginRenderPass(
 871         instruction.mFrameBuffer->GetGraphicsRenderPass(loadOp, Graphics::AttachmentStoreOp::STORE),
 872         instruction.mFrameBuffer->GetGraphicsRenderTarget(),
 873         {instruction.mFrameBuffer->GetWidth(), instruction.mFrameBuffer->GetHeight()},
 874         clearValues);
 875
 876       if(mImpl->currentContext != &mImpl->context)
 877       {
 878         // Switch to shared context for off-screen buffer
 879         mImpl->currentContext = &mImpl->context;
 880
 881         // Context switch now happens when render pass starts
 882         //        if(mImpl->currentContext->IsSurfacelessContextSupported())
 883         //        {
 884         //          mImpl->graphicsController.GetGlContextHelperAbstraction().MakeSurfacelessContextCurrent();
 885         //        }
 886
 887         // Clear the current cached program when the context is switched
 888         mImpl->programController.ClearCurrentProgram();
 889       }
 890     }
 891     else
 892     {
 893       if(mImpl->currentContext->IsSurfacelessContextSupported())
 894       {
 895         if(mImpl->currentContext != sceneObject->GetContext())
 896         {
 897           // Switch the correct context if rendering to a surface
 898           mImpl->currentContext = sceneObject->GetContext();
 899
 900           // Clear the current cached program when the context is switched
 901           mImpl->programController.ClearCurrentProgram();
 902         }
 903       }
 904
 905       // surface
 906       auto& clearValues = sceneObject->GetGraphicsRenderPassClearValues();
 907
 908       if(instruction.mIsClearColorSet)
 909       {
 910         clearValues[0].color = {
 911           instruction.mClearColor.r,
 912           instruction.mClearColor.g,
 913           instruction.mClearColor.b,
 914           instruction.mClearColor.a};
 915       }
 916
 917       mainCommandBuffer->BeginRenderPass(
 918         sceneObject->GetGraphicsRenderPass(),
 919         sceneObject->GetSurfaceRenderTarget(),
 920         {static_cast<uint32_t>(surfaceRect.width), static_cast<uint32_t>(surfaceRect.height)},
 921         clearValues);
 922     }
 923
 924     // Make sure that GL context must be created
 925     mImpl->currentContext->GlContextCreated();
 926
 927     // reset the program matrices for all programs once per frame
 928     // this ensures we will set view and projection matrix once per program per camera
 929     mImpl->programController.ResetProgramMatrices();
 930
 931     if(instruction.mFrameBuffer)
 932     {
 933       // For each offscreen buffer, update the dependency list with the new texture id used by this frame buffer.
 934       for(unsigned int i0 = 0, i1 = instruction.mFrameBuffer->GetColorAttachmentCount(); i0 < i1; ++i0)
 935       {
 936         mImpl->textureDependencyList.PushBack(instruction.mFrameBuffer->GetTexture(i0));
 937       }
 938     }
 939     else
 940     {
 941       //mImpl->currentContext->BindFramebuffer(GL_FRAMEBUFFER, 0u);
 942     }
 943
 944     // @todo Should this be a command in it's own right?
 945     // @todo yes
 946     if(!instruction.mFrameBuffer)
 947     {
 948       /*
 949       mImpl->currentContext->Viewport(surfaceRect.x,
 950                                       surfaceRect.y,
 951                                       surfaceRect.width,
 952                                       surfaceRect.height);
 953                                       */
 954
 955       /*
 956       mainCommandBuffer->SetViewport( {surfaceRect.x,
 957                                         surfaceRect.y,
 958                                         surfaceRect.width,
 959                                         surfaceRect.height} );
 960       */
 961     }
 962
 963     // Clear the entire color, depth and stencil buffers for the default framebuffer, if required.
 964     // It is important to clear all 3 buffers when they are being used, for performance on deferred renderers
 965     // e.g. previously when the depth & stencil buffers were NOT cleared, it caused the DDK to exceed a "vertex count limit",
 966     // and then stall. That problem is only noticeable when rendering a large number of vertices per frame.
 967
 968     /*
 969     GLbitfield clearMask = GL_COLOR_BUFFER_BIT;
 970
 971     mImpl->currentContext->ColorMask(true);
 972
 973     if(depthBufferAvailable == Integration::DepthBufferAvailable::TRUE)
 974     {
 975       mImpl->currentContext->DepthMask(true);
 976       clearMask |= GL_DEPTH_BUFFER_BIT;
 977     }
 978
 979     if(stencilBufferAvailable == Integration::StencilBufferAvailable::TRUE)
 980     {
 981       mImpl->currentContext->ClearStencil(0);
 982       mImpl->currentContext->StencilMask(0xFF); // 8 bit stencil mask, all 1's
 983       clearMask |= GL_STENCIL_BUFFER_BIT;
 984     }
 985     */
 986     if(!instruction.mIgnoreRenderToFbo && (instruction.mFrameBuffer != nullptr))
 987     {
 988       // Offscreen buffer rendering
 989       if(instruction.mIsViewportSet)
 990       {
 991         // For glViewport the lower-left corner is (0,0)
 992         const int32_t y = (instruction.mFrameBuffer->GetHeight() - instruction.mViewport.height) - instruction.mViewport.y;
 993         viewportRect.Set(instruction.mViewport.x, y, instruction.mViewport.width, instruction.mViewport.height);
 994       }
 995       else
 996       {
 997         viewportRect.Set(0, 0, instruction.mFrameBuffer->GetWidth(), instruction.mFrameBuffer->GetHeight());
 998       }
 999       surfaceOrientation = 0;
1000     }
1001     else // No Offscreen frame buffer rendering
1002     {
1003       // Check whether a viewport is specified, otherwise the full surface size is used
1004       if(instruction.mIsViewportSet)
1005       {
1006         // For glViewport the lower-left corner is (0,0)
1007         const int32_t y = (surfaceRect.height - instruction.mViewport.height) - instruction.mViewport.y;
1008         viewportRect.Set(instruction.mViewport.x, y, instruction.mViewport.width, instruction.mViewport.height);
1009       }
1010       else
1011       {
1012         viewportRect = surfaceRect;
1013       }
1014     }
1015
1016     // Set surface orientation
1017     mImpl->currentContext->SetSurfaceOrientation(surfaceOrientation);
1018
1019     /*** Clear region of framebuffer or surface before drawing ***/
1020
1021     bool clearFullFrameRect = true;
1022     if(instruction.mFrameBuffer != nullptr)
1023     {
1024       Viewport frameRect(0, 0, instruction.mFrameBuffer->GetWidth(), instruction.mFrameBuffer->GetHeight());
1025       clearFullFrameRect = (frameRect == viewportRect);
1026     }
1027     else
1028     {
1029       clearFullFrameRect = (surfaceRect == viewportRect);
1030     }
1031
1032     if(!clippingRect.IsEmpty())
1033     {
1034       if(!clippingRect.Intersect(viewportRect))
1035       {
1036         DALI_LOG_ERROR("Invalid clipping rect %d %d %d %d\n", clippingRect.x, clippingRect.y, clippingRect.width, clippingRect.height);
1037         clippingRect = Rect<int>();
1038       }
1039       clearFullFrameRect = false;
1040     }
1041
1042     // @todo The following block should be a command in it's own right.
1043     // Currently takes account of surface orientation in Context.
1044     // Or move entirely to RenderPass implementation
1045     mainCommandBuffer->SetViewport({float(viewportRect.x),
1046                                     float(viewportRect.y),
1047                                     float(viewportRect.width),
1048                                     float(viewportRect.height)});
1049
1050     //mImpl->currentContext->Viewport(viewportRect.x, viewportRect.y, viewportRect.width, viewportRect.height);
1051     if(instruction.mIsClearColorSet)
1052     {
1053       if(!clearFullFrameRect)
1054       {
1055         if(!clippingRect.IsEmpty())
1056         {
1057           //mImpl->currentContext->SetScissorTest(true);
1058           //mImpl->currentContext->Scissor(clippingRect.x, clippingRect.y, clippingRect.width, clippingRect.height);
1059           //mImpl->currentContext->Clear(clearMask, Context::FORCE_CLEAR);
1060           //mImpl->currentContext->SetScissorTest(false);
1061         }
1062         else
1063         {
1064           //mImpl->currentContext->SetScissorTest(true);
1065           //mImpl->currentContext->Scissor(viewportRect.x, viewportRect.y, viewportRect.width, viewportRect.height);
1066           //mImpl->currentContext->Clear(clearMask, Context::FORCE_CLEAR);
1067           //mImpl->currentContext->SetScissorTest(false);
1068         }
1069       }
1070       else
1071       {
1072         //mImpl->currentContext->SetScissorTest(false);
1073         //mImpl->currentContext->Clear(clearMask, Context::FORCE_CLEAR);
1074       }
1075     }
1076
1077     // Clear the list of bound textures
1078     mImpl->boundTextures.Clear();
1079
1080     mImpl->renderAlgorithms.ProcessRenderInstruction(
1081       instruction,
1082       *mImpl->currentContext,
1083       mImpl->renderBufferIndex,
1084       depthBufferAvailable,
1085       stencilBufferAvailable,
1086       mImpl->boundTextures,
1087       viewportRect,
1088       clippingRect,
1089       surfaceOrientation);
1090
1091     // Synchronise the FBO/Texture access when there are multiple contexts
1092     if(mImpl->currentContext->IsSurfacelessContextSupported())
1093     {
1094       // Check whether any bound texture is in the dependency list
1095       bool textureFound = false;
1096
1097       if(mImpl->boundTextures.Count() > 0u && mImpl->textureDependencyList.Count() > 0u)
1098       {
1099         for(auto texture : mImpl->textureDependencyList)
1100         {
1101           textureFound = std::find_if(mImpl->boundTextures.Begin(), mImpl->boundTextures.End(), [texture](Graphics::Texture* graphicsTexture) {
1102                            return texture == graphicsTexture;
1103                          }) != mImpl->boundTextures.End();
1104         }
1105       }
1106
1107       if(textureFound)
1108       {
1109         if(instruction.mFrameBuffer)
1110         {
1111           // For off-screen buffer
1112
1113           // Wait until all rendering calls for the currently context are executed
1114           // mImpl->graphicsController.GetGlContextHelperAbstraction().WaitClient();
1115
1116           // Clear the dependency list
1117           mImpl->textureDependencyList.Clear();
1118         }
1119         else
1120         {
1121           // Worker thread lambda function
1122           auto& glContextHelperAbstraction = mImpl->graphicsController.GetGlContextHelperAbstraction();
1123           auto  workerFunction             = [&glContextHelperAbstraction](int workerThread) {
1124             // Switch to the shared context in the worker thread
1125             glContextHelperAbstraction.MakeSurfacelessContextCurrent();
1126
1127             // Wait until all rendering calls for the shared context are executed
1128             glContextHelperAbstraction.WaitClient();
1129
1130             // Must clear the context in the worker thread
1131             // Otherwise the shared context cannot be switched to from the render thread
1132             glContextHelperAbstraction.MakeContextNull();
1133           };
1134
1135           auto future = mImpl->threadPool->SubmitTask(0u, workerFunction);
1136           if(future)
1137           {
1138             mImpl->threadPool->Wait();
1139
1140             // Clear the dependency list
1141             mImpl->textureDependencyList.Clear();
1142           }
1143         }
1144       }
1145     }
1146
1147     if(instruction.mRenderTracker && instruction.mFrameBuffer)
1148     {
1149       // This will create a sync object every frame this render tracker
1150       // is alive (though it should be now be created only for
1151       // render-once render tasks)
1152       instruction.mRenderTracker->CreateSyncObject(mImpl->graphicsController.GetGlSyncAbstraction());
1153       instruction.mRenderTracker = nullptr; // Only create once.
1154     }
1155
1156     // This now happens when the render pass for frame buffer finishes
1157     //    if(renderToFbo)
1158     //    {
1159     //      mImpl->currentContext->Flush();
1160     //    }
1161
1162     // End render pass
1163     mainCommandBuffer->EndRenderPass();
1164   }
1165   mImpl->renderAlgorithms.SubmitCommandBuffer();
1166
1167   GLenum attachments[] = {GL_DEPTH, GL_STENCIL};
1168   mImpl->currentContext->InvalidateFramebuffer(GL_FRAMEBUFFER, 2, attachments);
1169 }
1170
1171 void RenderManager::PostRender(bool uploadOnly)
1172 {
1173   // Submit main command buffer
1174   //mImpl->renderAlgorithms.SubmitCommandBuffer();
1175
1176   if(!uploadOnly)
1177   {
1178     // Context switch now happens outside the render manager
1179     //    if(mImpl->currentContext->IsSurfacelessContextSupported())
1180     //    {
1181     //      mImpl->graphicsController.GetGlContextHelperAbstraction().MakeSurfacelessContextCurrent();
1182     //    }
1183
1184     GLenum attachments[] = {GL_DEPTH, GL_STENCIL};
1185     mImpl->context.InvalidateFramebuffer(GL_FRAMEBUFFER, 2, attachments);
1186   }
1187
1188   //Notify RenderGeometries that rendering has finished
1189   for(auto&& iter : mImpl->geometryContainer)
1190   {
1191     iter->OnRenderFinished();
1192   }
1193
1194   mImpl->UpdateTrackers();
1195
1196   uint32_t count = 0u;
1197   for(uint32_t i = 0; i < mImpl->sceneContainer.size(); ++i)
1198   {
1199     count += mImpl->sceneContainer[i]->GetRenderInstructions().Count(mImpl->renderBufferIndex);
1200   }
1201
1202   const bool haveInstructions = count > 0u;
1203
1204   // If this frame was rendered due to instructions existing, we mark this so we know to clear the next frame.
1205   mImpl->lastFrameWasRendered = haveInstructions;
1206
1207   /**
1208    * The rendering has finished; swap to the next buffer.
1209    * Ideally the update has just finished using this buffer; otherwise the render thread
1210    * should block until the update has finished.
1211    */
1212   mImpl->renderBufferIndex = (0 != mImpl->renderBufferIndex) ? 0 : 1;
1213
1214   DALI_PRINT_RENDER_END();
1215 }
1216
1217 } // namespace SceneGraph
1218
1219 } // namespace Internal
1220
1221 } // namespace Dali