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

   1 /*
   2  * Copyright (c) 2023 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/internal/common/ordered-set.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/nodes/scene-graph-layer.h>
  33 #include <dali/internal/update/render-tasks/scene-graph-camera.h>
  34
  35 #include <dali/internal/common/owner-key-container.h>
  36
  37 #include <dali/internal/render/common/render-algorithms.h>
  38 #include <dali/internal/render/common/render-debug.h>
  39 #include <dali/internal/render/common/render-instruction.h>
  40 #include <dali/internal/render/common/render-tracker.h>
  41 #include <dali/internal/render/queue/render-queue.h>
  42 #include <dali/internal/render/renderers/pipeline-cache.h>
  43 #include <dali/internal/render/renderers/render-frame-buffer.h>
  44 #include <dali/internal/render/renderers/render-texture.h>
  45 #include <dali/internal/render/renderers/shader-cache.h>
  46 #include <dali/internal/render/renderers/uniform-buffer-manager.h>
  47 #include <dali/internal/render/renderers/uniform-buffer.h>
  48 #include <dali/internal/render/shaders/program-controller.h>
  49
  50 #include <memory>
  51
  52 namespace Dali
  53 {
  54 namespace Internal
  55 {
  56 namespace SceneGraph
  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 namespace
  66 {
  67 inline Graphics::Rect2D RecalculateScissorArea(const Graphics::Rect2D& scissorArea, int orientation, const Rect<int32_t>& viewportRect)
  68 {
  69   Graphics::Rect2D newScissorArea;
  70
  71   if(orientation == 90)
  72   {
  73     newScissorArea.x      = viewportRect.height - (scissorArea.y + scissorArea.height);
  74     newScissorArea.y      = scissorArea.x;
  75     newScissorArea.width  = scissorArea.height;
  76     newScissorArea.height = scissorArea.width;
  77   }
  78   else if(orientation == 180)
  79   {
  80     newScissorArea.x      = viewportRect.width - (scissorArea.x + scissorArea.width);
  81     newScissorArea.y      = viewportRect.height - (scissorArea.y + scissorArea.height);
  82     newScissorArea.width  = scissorArea.width;
  83     newScissorArea.height = scissorArea.height;
  84   }
  85   else if(orientation == 270)
  86   {
  87     newScissorArea.x      = scissorArea.y;
  88     newScissorArea.y      = viewportRect.width - (scissorArea.x + scissorArea.width);
  89     newScissorArea.width  = scissorArea.height;
  90     newScissorArea.height = scissorArea.width;
  91   }
  92   else
  93   {
  94     newScissorArea.x      = scissorArea.x;
  95     newScissorArea.y      = scissorArea.y;
  96     newScissorArea.width  = scissorArea.width;
  97     newScissorArea.height = scissorArea.height;
  98   }
  99   return newScissorArea;
 100 }
 101
 102 inline Rect<int32_t> CalculateUpdateArea(RenderItem& item, BufferIndex renderBufferIndex, const Rect<int32_t>& viewportRect)
 103 {
 104   Vector4 updateArea;
 105   if(item.mNode && item.mNode->IsTextureUpdateAreaUsed() && item.mRenderer)
 106   {
 107     updateArea = item.mRenderer->GetTextureUpdateArea();
 108   }
 109   else
 110   {
 111     updateArea = item.mRenderer ? item.mRenderer->GetVisualTransformedUpdateArea(renderBufferIndex, item.mUpdateArea) : item.mUpdateArea;
 112   }
 113
 114   return RenderItem::CalculateViewportSpaceAABB(item.mModelViewMatrix, Vector3(updateArea.x, updateArea.y, 0.0f), Vector3(updateArea.z, updateArea.w, 0.0f), viewportRect.width, viewportRect.height);
 115 }
 116
 117 inline void AlignDamagedRect(Rect<int32_t>& rect)
 118 {
 119   const int left   = rect.x;
 120   const int top    = rect.y;
 121   const int right  = rect.x + rect.width;
 122   const int bottom = rect.y + rect.height;
 123   rect.x           = (left / 16) * 16;
 124   rect.y           = (top / 16) * 16;
 125   rect.width       = ((right + 16) / 16) * 16 - rect.x;
 126   rect.height      = ((bottom + 16) / 16) * 16 - rect.y;
 127 }
 128 } // namespace
 129
 130 /**
 131  * Structure to contain internal data
 132  */
 133 struct RenderManager::Impl
 134 {
 135   Impl(Graphics::Controller&               graphicsController,
 136        Integration::DepthBufferAvailable   depthBufferAvailableParam,
 137        Integration::StencilBufferAvailable stencilBufferAvailableParam,
 138        Integration::PartialUpdateAvailable partialUpdateAvailableParam)
 139   : graphicsController(graphicsController),
 140     renderAlgorithms(graphicsController),
 141     programController(graphicsController),
 142     shaderCache(graphicsController),
 143     depthBufferAvailable(depthBufferAvailableParam),
 144     stencilBufferAvailable(stencilBufferAvailableParam),
 145     partialUpdateAvailable(partialUpdateAvailableParam)
 146   {
 147     // Create thread pool with just one thread ( there may be a need to create more threads in the future ).
 148     threadPool = std::make_unique<Dali::ThreadPool>();
 149     threadPool->Initialize(1u);
 150
 151     uniformBufferManager = std::make_unique<Render::UniformBufferManager>(&graphicsController);
 152     pipelineCache        = std::make_unique<Render::PipelineCache>(graphicsController);
 153   }
 154
 155   ~Impl()
 156   {
 157     threadPool.reset(nullptr); // reset now to maintain correct destruction order
 158     rendererContainer.Clear(); // clear now before the pipeline cache is deleted
 159   }
 160
 161   void AddRenderTracker(Render::RenderTracker* renderTracker)
 162   {
 163     DALI_ASSERT_DEBUG(renderTracker != nullptr);
 164     mRenderTrackers.PushBack(renderTracker);
 165   }
 166
 167   void RemoveRenderTracker(Render::RenderTracker* renderTracker)
 168   {
 169     mRenderTrackers.EraseObject(renderTracker);
 170   }
 171
 172   void UpdateTrackers()
 173   {
 174     for(auto&& iter : mRenderTrackers)
 175     {
 176       iter->PollSyncObject();
 177     }
 178   }
 179
 180   // the order is important for destruction,
 181   Graphics::Controller&           graphicsController;
 182   RenderQueue                     renderQueue;      ///< A message queue for receiving messages from the update-thread.
 183   std::vector<SceneGraph::Scene*> sceneContainer;   ///< List of pointers to the scene graph objects of the scenes
 184   Render::RenderAlgorithms        renderAlgorithms; ///< The RenderAlgorithms object is used to action the renders required by a RenderInstruction
 185
 186   OrderedSet<Render::Sampler>         samplerContainer;      ///< List of owned samplers
 187   OrderedSet<Render::FrameBuffer>     frameBufferContainer;  ///< List of owned framebuffers
 188   OrderedSet<Render::VertexBuffer>    vertexBufferContainer; ///< List of owned vertex buffers
 189   OrderedSet<Render::Geometry>        geometryContainer;     ///< List of owned Geometries
 190   OwnerKeyContainer<Render::Renderer> rendererContainer;     ///< List of owned renderers
 191   OwnerKeyContainer<Render::Texture>  textureContainer;      ///< List of owned textures
 192
 193   OrderedSet<Render::RenderTracker> mRenderTrackers; ///< List of owned render trackers
 194
 195   ProgramController   programController; ///< Owner of the programs
 196   Render::ShaderCache shaderCache;       ///< The cache for the graphics shaders
 197
 198   std::unique_ptr<Render::UniformBufferManager> uniformBufferManager; ///< The uniform buffer manager
 199   std::unique_ptr<Render::PipelineCache>        pipelineCache;
 200
 201   Integration::DepthBufferAvailable   depthBufferAvailable;   ///< Whether the depth buffer is available
 202   Integration::StencilBufferAvailable stencilBufferAvailable; ///< Whether the stencil buffer is available
 203   Integration::PartialUpdateAvailable partialUpdateAvailable; ///< Whether the partial update is available
 204
 205   std::unique_ptr<Dali::ThreadPool> threadPool;            ///< The thread pool
 206   Vector<Graphics::Texture*>        boundTextures;         ///< The textures bound for rendering
 207   Vector<Graphics::Texture*>        textureDependencyList; ///< The dependency list of bound textures
 208   Vector<Render::TextureKey>        updatedTextures{};     ///< The updated texture list
 209
 210   uint32_t    frameCount{0u};                                                    ///< The current frame count
 211   BufferIndex renderBufferIndex{SceneGraphBuffers::INITIAL_UPDATE_BUFFER_INDEX}; ///< The index of the buffer to read from;
 212
 213   bool lastFrameWasRendered{false}; ///< Keeps track of the last frame being rendered due to having render instructions
 214   bool commandBufferSubmitted{false};
 215 };
 216
 217 RenderManager* RenderManager::New(Graphics::Controller&               graphicsController,
 218                                   Integration::DepthBufferAvailable   depthBufferAvailable,
 219                                   Integration::StencilBufferAvailable stencilBufferAvailable,
 220                                   Integration::PartialUpdateAvailable partialUpdateAvailable)
 221 {
 222   auto* manager  = new RenderManager;
 223   manager->mImpl = new Impl(graphicsController,
 224                             depthBufferAvailable,
 225                             stencilBufferAvailable,
 226                             partialUpdateAvailable);
 227   return manager;
 228 }
 229
 230 RenderManager::RenderManager()
 231 : mImpl(nullptr)
 232 {
 233 }
 234
 235 RenderManager::~RenderManager()
 236 {
 237   delete mImpl;
 238 }
 239
 240 RenderQueue& RenderManager::GetRenderQueue()
 241 {
 242   return mImpl->renderQueue;
 243 }
 244
 245 void RenderManager::SetShaderSaver(ShaderSaver& upstream)
 246 {
 247 }
 248
 249 void RenderManager::AddRenderer(const Render::RendererKey& renderer)
 250 {
 251   // Initialize the renderer as we are now in render thread
 252   renderer->Initialize(mImpl->graphicsController, mImpl->programController, mImpl->shaderCache, *(mImpl->uniformBufferManager.get()), *(mImpl->pipelineCache.get()));
 253
 254   mImpl->rendererContainer.PushBack(renderer);
 255 }
 256
 257 void RenderManager::RemoveRenderer(const Render::RendererKey& renderer)
 258 {
 259   mImpl->rendererContainer.EraseKey(renderer);
 260 }
 261
 262 void RenderManager::AddSampler(OwnerPointer<Render::Sampler>& sampler)
 263 {
 264   sampler->Initialize(mImpl->graphicsController);
 265   mImpl->samplerContainer.PushBack(sampler.Release());
 266 }
 267
 268 void RenderManager::RemoveSampler(Render::Sampler* sampler)
 269 {
 270   mImpl->samplerContainer.EraseObject(sampler);
 271 }
 272
 273 void RenderManager::AddTexture(const Render::TextureKey& textureKey)
 274 {
 275   DALI_ASSERT_DEBUG(textureKey && "Trying to add empty texture key");
 276
 277   textureKey->Initialize(mImpl->graphicsController);
 278   mImpl->textureContainer.PushBack(textureKey);
 279   mImpl->updatedTextures.PushBack(textureKey);
 280 }
 281
 282 void RenderManager::RemoveTexture(const Render::TextureKey& textureKey)
 283 {
 284   DALI_ASSERT_DEBUG(textureKey && "Trying to remove empty texture key");
 285
 286   // Find the texture, use std::find so we can do the erase by iterator safely
 287   auto iter = std::find(mImpl->textureContainer.Begin(), mImpl->textureContainer.End(), textureKey);
 288
 289   if(iter != mImpl->textureContainer.End())
 290   {
 291     textureKey->Destroy();
 292     mImpl->textureContainer.Erase(iter); // Texture found; now destroy it
 293   }
 294 }
 295
 296 void RenderManager::UploadTexture(const Render::TextureKey& textureKey, PixelDataPtr pixelData, const Texture::UploadParams& params)
 297 {
 298   DALI_ASSERT_DEBUG(textureKey && "Trying to upload to empty texture key");
 299   textureKey->Upload(pixelData, params);
 300
 301   mImpl->updatedTextures.PushBack(textureKey);
 302 }
 303
 304 void RenderManager::GenerateMipmaps(const Render::TextureKey& textureKey)
 305 {
 306   DALI_ASSERT_DEBUG(textureKey && "Trying to generate mipmaps on empty texture key");
 307   textureKey->GenerateMipmaps();
 308
 309   mImpl->updatedTextures.PushBack(textureKey);
 310 }
 311
 312 void RenderManager::SetTextureUpdated(const Render::TextureKey& textureKey)
 313 {
 314   DALI_ASSERT_DEBUG(textureKey && "Trying to set updated on empty texture key");
 315   textureKey->SetUpdated(true);
 316
 317   mImpl->updatedTextures.PushBack(textureKey);
 318 }
 319
 320 void RenderManager::SetFilterMode(Render::Sampler* sampler, uint32_t minFilterMode, uint32_t magFilterMode)
 321 {
 322   sampler->SetFilterMode(static_cast<Dali::FilterMode::Type>(minFilterMode),
 323                          static_cast<Dali::FilterMode::Type>(magFilterMode));
 324 }
 325
 326 void RenderManager::SetWrapMode(Render::Sampler* sampler, uint32_t rWrapMode, uint32_t sWrapMode, uint32_t tWrapMode)
 327 {
 328   sampler->SetWrapMode(static_cast<Dali::WrapMode::Type>(rWrapMode),
 329                        static_cast<Dali::WrapMode::Type>(sWrapMode),
 330                        static_cast<Dali::WrapMode::Type>(tWrapMode));
 331 }
 332
 333 void RenderManager::AddFrameBuffer(OwnerPointer<Render::FrameBuffer>& frameBuffer)
 334 {
 335   Render::FrameBuffer* frameBufferPtr = frameBuffer.Release();
 336   mImpl->frameBufferContainer.PushBack(frameBufferPtr);
 337   frameBufferPtr->Initialize(mImpl->graphicsController);
 338 }
 339
 340 void RenderManager::RemoveFrameBuffer(Render::FrameBuffer* frameBuffer)
 341 {
 342   DALI_ASSERT_DEBUG(nullptr != frameBuffer);
 343
 344   // Find the framebuffer, use OrderedSet.Find so we can safely do the erase
 345   auto iter = mImpl->frameBufferContainer.Find(frameBuffer);
 346
 347   if(iter != mImpl->frameBufferContainer.End())
 348   {
 349     frameBuffer->Destroy();
 350     mImpl->frameBufferContainer.Erase(iter); // frameBuffer found; now destroy it
 351   }
 352 }
 353
 354 void RenderManager::InitializeScene(SceneGraph::Scene* scene)
 355 {
 356   scene->Initialize(mImpl->graphicsController, mImpl->depthBufferAvailable, mImpl->stencilBufferAvailable);
 357   mImpl->sceneContainer.push_back(scene);
 358   mImpl->uniformBufferManager->RegisterScene(scene);
 359 }
 360
 361 void RenderManager::UninitializeScene(SceneGraph::Scene* scene)
 362 {
 363   mImpl->uniformBufferManager->UnregisterScene(scene);
 364   auto iter = std::find(mImpl->sceneContainer.begin(), mImpl->sceneContainer.end(), scene);
 365   if(iter != mImpl->sceneContainer.end())
 366   {
 367     mImpl->sceneContainer.erase(iter);
 368   }
 369 }
 370
 371 void RenderManager::SurfaceReplaced(SceneGraph::Scene* scene)
 372 {
 373   scene->Initialize(mImpl->graphicsController, mImpl->depthBufferAvailable, mImpl->stencilBufferAvailable);
 374 }
 375
 376 void RenderManager::AttachColorTextureToFrameBuffer(Render::FrameBuffer* frameBuffer, Render::Texture* texture, uint32_t mipmapLevel, uint32_t layer)
 377 {
 378   frameBuffer->AttachColorTexture(texture, mipmapLevel, layer);
 379 }
 380
 381 void RenderManager::AttachDepthTextureToFrameBuffer(Render::FrameBuffer* frameBuffer, Render::Texture* texture, uint32_t mipmapLevel)
 382 {
 383   frameBuffer->AttachDepthTexture(texture, mipmapLevel);
 384 }
 385
 386 void RenderManager::AttachDepthStencilTextureToFrameBuffer(Render::FrameBuffer* frameBuffer, Render::Texture* texture, uint32_t mipmapLevel)
 387 {
 388   frameBuffer->AttachDepthStencilTexture(texture, mipmapLevel);
 389 }
 390
 391 void RenderManager::SetMultiSamplingLevelToFrameBuffer(Render::FrameBuffer* frameBuffer, uint8_t multiSamplingLevel)
 392 {
 393   frameBuffer->SetMultiSamplingLevel(multiSamplingLevel);
 394 }
 395
 396 void RenderManager::AddVertexBuffer(OwnerPointer<Render::VertexBuffer>& vertexBuffer)
 397 {
 398   mImpl->vertexBufferContainer.PushBack(vertexBuffer.Release());
 399 }
 400
 401 void RenderManager::RemoveVertexBuffer(Render::VertexBuffer* vertexBuffer)
 402 {
 403   mImpl->vertexBufferContainer.EraseObject(vertexBuffer);
 404 }
 405
 406 void RenderManager::SetVertexBufferFormat(Render::VertexBuffer* vertexBuffer, OwnerPointer<Render::VertexBuffer::Format>& format)
 407 {
 408   vertexBuffer->SetFormat(format.Release());
 409 }
 410
 411 void RenderManager::SetVertexBufferData(Render::VertexBuffer* vertexBuffer, OwnerPointer<Vector<uint8_t>>& data, uint32_t size)
 412 {
 413   vertexBuffer->SetData(data.Release(), size);
 414 }
 415
 416 void RenderManager::SetVertexBufferUpdateCallback(Render::VertexBuffer* vertexBuffer, Dali::VertexBufferUpdateCallback* callback)
 417 {
 418   vertexBuffer->SetVertexBufferUpdateCallback(callback);
 419 }
 420
 421 void RenderManager::SetIndexBuffer(Render::Geometry* geometry, Render::Geometry::Uint16ContainerType& indices)
 422 {
 423   geometry->SetIndexBuffer(indices);
 424 }
 425
 426 void RenderManager::SetIndexBuffer(Render::Geometry* geometry, Render::Geometry::Uint32ContainerType& indices)
 427 {
 428   geometry->SetIndexBuffer(indices);
 429 }
 430
 431 void RenderManager::AddGeometry(OwnerPointer<Render::Geometry>& geometry)
 432 {
 433   mImpl->geometryContainer.PushBack(geometry.Release());
 434 }
 435
 436 void RenderManager::RemoveGeometry(Render::Geometry* geometry)
 437 {
 438   mImpl->geometryContainer.EraseObject(geometry);
 439 }
 440
 441 void RenderManager::AttachVertexBuffer(Render::Geometry* geometry, Render::VertexBuffer* vertexBuffer)
 442 {
 443   geometry->AddVertexBuffer(vertexBuffer);
 444 }
 445
 446 void RenderManager::RemoveVertexBuffer(Render::Geometry* geometry, Render::VertexBuffer* vertexBuffer)
 447 {
 448   geometry->RemoveVertexBuffer(vertexBuffer);
 449 }
 450
 451 void RenderManager::SetGeometryType(Render::Geometry* geometry, uint32_t geometryType)
 452 {
 453   geometry->SetType(Render::Geometry::Type(geometryType));
 454 }
 455
 456 void RenderManager::AddRenderTracker(Render::RenderTracker* renderTracker)
 457 {
 458   mImpl->AddRenderTracker(renderTracker);
 459 }
 460
 461 void RenderManager::RemoveRenderTracker(Render::RenderTracker* renderTracker)
 462 {
 463   mImpl->RemoveRenderTracker(renderTracker);
 464 }
 465
 466 void RenderManager::PreRender(Integration::RenderStatus& status, bool forceClear)
 467 {
 468   DALI_PRINT_RENDER_START(mImpl->renderBufferIndex);
 469   DALI_LOG_INFO(gLogFilter, Debug::Verbose, "\n\nNewFrame %d\n", mImpl->frameCount);
 470
 471   // Increment the frame count at the beginning of each frame
 472   ++mImpl->frameCount;
 473
 474   // Process messages queued during previous update
 475   mImpl->renderQueue.ProcessMessages(mImpl->renderBufferIndex);
 476
 477   uint32_t totalInstructionCount = 0u;
 478   for(auto& i : mImpl->sceneContainer)
 479   {
 480     totalInstructionCount += i->GetRenderInstructions().Count(mImpl->renderBufferIndex);
 481   }
 482
 483   const bool haveInstructions = totalInstructionCount > 0u;
 484
 485   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");
 486
 487   // Only render if we have instructions to render, or the last frame was rendered (and therefore a clear is required).
 488   if(haveInstructions || mImpl->lastFrameWasRendered || forceClear)
 489   {
 490     DALI_LOG_INFO(gLogFilter, Debug::General, "Render: Processing\n");
 491
 492     // Upload the geometries
 493     for(auto&& geom : mImpl->geometryContainer)
 494     {
 495       geom->Upload(mImpl->graphicsController);
 496     }
 497   }
 498
 499   // Reset pipeline cache before rendering
 500   mImpl->pipelineCache->PreRender();
 501
 502   mImpl->commandBufferSubmitted = false;
 503 }
 504
 505 void RenderManager::PreRender(Integration::Scene& scene, std::vector<Rect<int>>& damagedRects)
 506 {
 507   if(mImpl->partialUpdateAvailable != Integration::PartialUpdateAvailable::TRUE)
 508   {
 509     return;
 510   }
 511
 512   Internal::Scene&   sceneInternal = GetImplementation(scene);
 513   SceneGraph::Scene* sceneObject   = sceneInternal.GetSceneObject();
 514
 515   if(!sceneObject || sceneObject->IsRenderingSkipped())
 516   {
 517     // We don't need to calculate dirty rects
 518     return;
 519   }
 520
 521   class DamagedRectsCleaner
 522   {
 523   public:
 524     explicit DamagedRectsCleaner(std::vector<Rect<int>>& damagedRects, Rect<int>& surfaceRect)
 525     : mDamagedRects(damagedRects),
 526       mSurfaceRect(surfaceRect),
 527       mCleanOnReturn(true)
 528     {
 529     }
 530
 531     void SetCleanOnReturn(bool cleanOnReturn)
 532     {
 533       mCleanOnReturn = cleanOnReturn;
 534     }
 535
 536     ~DamagedRectsCleaner()
 537     {
 538       if(mCleanOnReturn)
 539       {
 540         mDamagedRects.clear();
 541         mDamagedRects.push_back(mSurfaceRect);
 542       }
 543     }
 544
 545   private:
 546     std::vector<Rect<int>>& mDamagedRects;
 547     Rect<int>               mSurfaceRect;
 548     bool                    mCleanOnReturn;
 549   };
 550
 551   Rect<int32_t> surfaceRect = sceneObject->GetSurfaceRect();
 552
 553   // Clean collected dirty/damaged rects on exit if 3d layer or 3d node or other conditions.
 554   DamagedRectsCleaner damagedRectCleaner(damagedRects, surfaceRect);
 555   bool                cleanDamagedRect = false;
 556
 557   Scene::ItemsDirtyRectsContainer& itemsDirtyRects = sceneObject->GetItemsDirtyRects();
 558
 559   if(!sceneObject->IsPartialUpdateEnabled())
 560   {
 561     // Clear all dirty rects
 562     // The rects will be added when partial updated is enabled again
 563     itemsDirtyRects.clear();
 564     return;
 565   }
 566
 567   // Mark previous dirty rects in the std::unordered_map.
 568   for(auto& dirtyRectPair : itemsDirtyRects)
 569   {
 570     dirtyRectPair.second.visited = false;
 571   }
 572
 573   uint32_t instructionCount = sceneObject->GetRenderInstructions().Count(mImpl->renderBufferIndex);
 574   for(uint32_t i = 0; i < instructionCount; ++i)
 575   {
 576     RenderInstruction& instruction = sceneObject->GetRenderInstructions().At(mImpl->renderBufferIndex, i);
 577
 578     if(instruction.mFrameBuffer)
 579     {
 580       cleanDamagedRect = true;
 581       continue; // TODO: reset, we don't deal with render tasks with framebuffers (for now)
 582     }
 583
 584     const Camera* camera = instruction.GetCamera();
 585     if(camera && camera->mType == Camera::DEFAULT_TYPE && camera->mTargetPosition == Camera::DEFAULT_TARGET_POSITION)
 586     {
 587       Vector3    position;
 588       Vector3    scale;
 589       Quaternion orientation;
 590       camera->GetWorldMatrix(mImpl->renderBufferIndex).GetTransformComponents(position, orientation, scale);
 591
 592       Vector3 orientationAxis;
 593       Radian  orientationAngle;
 594       orientation.ToAxisAngle(orientationAxis, orientationAngle);
 595
 596       if(position.x > Math::MACHINE_EPSILON_10000 ||
 597          position.y > Math::MACHINE_EPSILON_10000 ||
 598          orientationAxis != Vector3(0.0f, 1.0f, 0.0f) ||
 599          orientationAngle != ANGLE_180 ||
 600          scale != Vector3(1.0f, 1.0f, 1.0f))
 601       {
 602         cleanDamagedRect = true;
 603         continue;
 604       }
 605     }
 606     else
 607     {
 608       cleanDamagedRect = true;
 609       continue;
 610     }
 611
 612     Rect<int32_t> viewportRect;
 613     if(instruction.mIsViewportSet)
 614     {
 615       const int32_t y = (surfaceRect.height - instruction.mViewport.height) - instruction.mViewport.y;
 616       viewportRect.Set(instruction.mViewport.x, y, instruction.mViewport.width, instruction.mViewport.height);
 617       if(viewportRect.IsEmpty() || !viewportRect.IsValid())
 618       {
 619         cleanDamagedRect = true;
 620         continue; // just skip funny use cases for now, empty viewport means it is set somewhere else
 621       }
 622     }
 623     else
 624     {
 625       viewportRect = surfaceRect;
 626     }
 627
 628     const Matrix* viewMatrix       = instruction.GetViewMatrix(mImpl->renderBufferIndex);
 629     const Matrix* projectionMatrix = instruction.GetProjectionMatrix(mImpl->renderBufferIndex);
 630     if(viewMatrix && projectionMatrix)
 631     {
 632       const RenderListContainer::SizeType count = instruction.RenderListCount();
 633       for(RenderListContainer::SizeType index = 0u; index < count; ++index)
 634       {
 635         const RenderList* renderList = instruction.GetRenderList(index);
 636         if(renderList)
 637         {
 638           if(!renderList->IsEmpty())
 639           {
 640             const std::size_t listCount = renderList->Count();
 641             for(uint32_t listIndex = 0u; listIndex < listCount; ++listIndex)
 642             {
 643               RenderItem& item = renderList->GetItem(listIndex);
 644               // If the item does 3D transformation, make full update
 645               if(item.mUpdateArea == Vector4::ZERO)
 646               {
 647                 cleanDamagedRect = true;
 648
 649                 // Save the full rect in the damaged list. We need it when this item is removed
 650                 DirtyRectKey dirtyRectKey(item.mNode, item.mRenderer);
 651                 auto         dirtyRectPos = itemsDirtyRects.find(dirtyRectKey);
 652                 if(dirtyRectPos != itemsDirtyRects.end())
 653                 {
 654                   // Replace the rect
 655                   dirtyRectPos->second.visited = true;
 656                   dirtyRectPos->second.rect    = surfaceRect;
 657                 }
 658                 else
 659                 {
 660                   // Else, just insert the new dirtyrect
 661                   itemsDirtyRects.insert({dirtyRectKey, surfaceRect});
 662                 }
 663                 continue;
 664               }
 665
 666               Rect<int>    rect;
 667               DirtyRectKey dirtyRectKey(item.mNode, item.mRenderer);
 668               // If the item refers to updated node or renderer.
 669               if(item.mIsUpdated ||
 670                  (item.mNode &&
 671                   (item.mNode->Updated() || (item.mRenderer && item.mRenderer->Updated()))))
 672               {
 673                 item.mIsUpdated = false;
 674
 675                 rect = CalculateUpdateArea(item, mImpl->renderBufferIndex, viewportRect);
 676                 if(rect.IsValid() && rect.Intersect(viewportRect) && !rect.IsEmpty())
 677                 {
 678                   AlignDamagedRect(rect);
 679
 680                   // Found valid dirty rect.
 681                   auto dirtyRectPos = itemsDirtyRects.find(dirtyRectKey);
 682                   if(dirtyRectPos != itemsDirtyRects.end())
 683                   {
 684                     Rect<int> currentRect = rect;
 685
 686                     // Same item, merge it with the previous rect
 687                     rect.Merge(dirtyRectPos->second.rect);
 688
 689                     // Replace the rect as current
 690                     dirtyRectPos->second.visited = true;
 691                     dirtyRectPos->second.rect    = currentRect;
 692                   }
 693                   else
 694                   {
 695                     // Else, just insert the new dirtyrect
 696                     itemsDirtyRects.insert({dirtyRectKey, rect});
 697                   }
 698
 699                   damagedRects.push_back(rect);
 700                 }
 701               }
 702               else
 703               {
 704                 // 1. The item is not dirty, the node and renderer referenced by the item are still exist.
 705                 // 2. Mark the related dirty rects as visited so they will not be removed below.
 706                 auto dirtyRectPos = itemsDirtyRects.find(dirtyRectKey);
 707                 if(dirtyRectPos != itemsDirtyRects.end())
 708                 {
 709                   dirtyRectPos->second.visited = true;
 710                 }
 711                 else
 712                 {
 713                   // The item is not in the list for some reason. Add the current rect!
 714                   rect = CalculateUpdateArea(item, mImpl->renderBufferIndex, viewportRect);
 715                   if(rect.IsValid() && rect.Intersect(viewportRect) && !rect.IsEmpty())
 716                   {
 717                     AlignDamagedRect(rect);
 718
 719                     itemsDirtyRects.insert({dirtyRectKey, rect});
 720                   }
 721                   cleanDamagedRect = true; // And make full update at this frame
 722                 }
 723               }
 724             }
 725           }
 726         }
 727       }
 728     }
 729   }
 730
 731   // Check removed nodes or removed renderers dirty rects
 732   // Note, std::unordered_map end iterator is validate if we call erase.
 733   for(auto iter = itemsDirtyRects.cbegin(), iterEnd = itemsDirtyRects.cend(); iter != iterEnd;)
 734   {
 735     if(!iter->second.visited)
 736     {
 737       damagedRects.push_back(iter->second.rect);
 738       iter = itemsDirtyRects.erase(iter);
 739     }
 740     else
 741     {
 742       ++iter;
 743     }
 744   }
 745
 746   if(sceneObject->IsNeededFullUpdate())
 747   {
 748     cleanDamagedRect = true; // And make full update at this frame
 749   }
 750
 751   if(!cleanDamagedRect)
 752   {
 753     damagedRectCleaner.SetCleanOnReturn(false);
 754   }
 755 }
 756
 757 void RenderManager::RenderScene(Integration::RenderStatus& status, Integration::Scene& scene, bool renderToFbo)
 758 {
 759   SceneGraph::Scene* sceneObject = GetImplementation(scene).GetSceneObject();
 760   if(!sceneObject)
 761   {
 762     return;
 763   }
 764
 765   Rect<int> clippingRect = sceneObject->GetSurfaceRect();
 766   RenderScene(status, scene, renderToFbo, clippingRect);
 767 }
 768
 769 void RenderManager::RenderScene(Integration::RenderStatus& status, Integration::Scene& scene, bool renderToFbo, Rect<int>& clippingRect)
 770 {
 771   if(mImpl->partialUpdateAvailable == Integration::PartialUpdateAvailable::TRUE && !renderToFbo && clippingRect.IsEmpty())
 772   {
 773     // ClippingRect is empty. Skip rendering
 774     return;
 775   }
 776
 777   // Reset main algorithms command buffer
 778   mImpl->renderAlgorithms.ResetCommandBuffer();
 779
 780   auto mainCommandBuffer = mImpl->renderAlgorithms.GetMainCommandBuffer();
 781
 782   Internal::Scene&   sceneInternal = GetImplementation(scene);
 783   SceneGraph::Scene* sceneObject   = sceneInternal.GetSceneObject();
 784   if(!sceneObject)
 785   {
 786     return;
 787   }
 788
 789   uint32_t instructionCount = sceneObject->GetRenderInstructions().Count(mImpl->renderBufferIndex);
 790
 791   std::vector<Graphics::RenderTarget*> targetstoPresent;
 792
 793   Rect<int32_t> surfaceRect = sceneObject->GetSurfaceRect();
 794   if(clippingRect == surfaceRect)
 795   {
 796     // Full rendering case
 797     // Make clippingRect empty because we're doing full rendering now if the clippingRect is empty.
 798     // To reduce side effects, keep this logic now.
 799     clippingRect = Rect<int>();
 800   }
 801
 802   // Prefetch programs before we start rendering so reflection is
 803   // ready, and we can pull exact size of UBO needed (no need to resize during drawing)
 804   auto totalSizeCPU = 0u;
 805   auto totalSizeGPU = 0u;
 806
 807   for(uint32_t i = 0; i < instructionCount; ++i)
 808   {
 809     RenderInstruction& instruction = sceneObject->GetRenderInstructions().At(mImpl->renderBufferIndex, i);
 810
 811     if((instruction.mFrameBuffer != nullptr && renderToFbo) ||
 812        (instruction.mFrameBuffer == nullptr && !renderToFbo))
 813     {
 814       for(auto j = 0u; j < instruction.RenderListCount(); ++j)
 815       {
 816         const auto& renderList = instruction.GetRenderList(j);
 817         for(auto k = 0u; k < renderList->Count(); ++k)
 818         {
 819           auto& item = renderList->GetItem(k);
 820           if(item.mRenderer && item.mRenderer->NeedsProgram())
 821           {
 822             // Prepare and store used programs for further processing
 823             auto program = item.mRenderer->PrepareProgram(instruction);
 824             if(program)
 825             {
 826               auto memoryRequirements = program->GetUniformBlocksMemoryRequirements();
 827
 828               totalSizeCPU += memoryRequirements.totalCpuSizeRequired;
 829               totalSizeGPU += memoryRequirements.totalGpuSizeRequired;
 830             }
 831           }
 832         }
 833       }
 834     }
 835   }
 836
 837   DALI_LOG_INFO(gLogFilter, Debug::Verbose, "Render scene (%s), CPU:%d GPU:%d\n", renderToFbo ? "Offscreen" : "Onscreen", totalSizeCPU, totalSizeGPU);
 838
 839   auto& uboManager = mImpl->uniformBufferManager;
 840
 841   uboManager->SetCurrentSceneRenderInfo(sceneObject, renderToFbo);
 842   uboManager->Rollback(sceneObject, renderToFbo);
 843
 844   // Respec UBOs for this frame (orphan buffers or double buffer in the GPU)
 845   if(instructionCount)
 846   {
 847     uboManager->GetUniformBufferForScene(sceneObject, renderToFbo, true)->ReSpecify(totalSizeCPU);
 848     uboManager->GetUniformBufferForScene(sceneObject, renderToFbo, false)->ReSpecify(totalSizeGPU);
 849   }
 850
 851 #if defined(DEBUG_ENABLED)
 852   auto uniformBuffer1 = uboManager->GetUniformBufferForScene(sceneObject, renderToFbo, true);
 853   auto uniformBuffer2 = uboManager->GetUniformBufferForScene(sceneObject, renderToFbo, false);
 854   if(uniformBuffer1)
 855   {
 856     DALI_LOG_INFO(gLogFilter, Debug::Verbose, "CPU buffer: Offset(%d), Cap(%d)\n", uniformBuffer1->GetCurrentOffset(), uniformBuffer1->GetCurrentCapacity());
 857   }
 858   else
 859   {
 860     DALI_LOG_INFO(gLogFilter, Debug::Verbose, "CPU buffer: nil\n");
 861   }
 862   if(uniformBuffer2)
 863   {
 864     DALI_LOG_INFO(gLogFilter, Debug::Verbose, "GPU buffer: Offset(%d), Cap(%d)\n", uniformBuffer2->GetCurrentOffset(), uniformBuffer2->GetCurrentCapacity());
 865   }
 866   else
 867   {
 868     DALI_LOG_INFO(gLogFilter, Debug::Verbose, "GPU buffer: nil\n");
 869   }
 870 #endif
 871
 872   for(uint32_t i = 0; i < instructionCount; ++i)
 873   {
 874     RenderInstruction& instruction = sceneObject->GetRenderInstructions().At(mImpl->renderBufferIndex, i);
 875
 876     if((renderToFbo && !instruction.mFrameBuffer) || (!renderToFbo && instruction.mFrameBuffer))
 877     {
 878       continue; // skip
 879     }
 880
 881     // Mark that we will require a post-render step to be performed (includes swap-buffers).
 882     status.SetNeedsPostRender(true);
 883
 884     Rect<int32_t> viewportRect;
 885
 886     int32_t surfaceOrientation = sceneObject->GetSurfaceOrientation() + sceneObject->GetScreenOrientation();
 887     if(surfaceOrientation >= 360)
 888     {
 889       surfaceOrientation -= 360;
 890     }
 891
 892     // @todo Should these be part of scene?
 893     Integration::DepthBufferAvailable   depthBufferAvailable   = mImpl->depthBufferAvailable;
 894     Integration::StencilBufferAvailable stencilBufferAvailable = mImpl->stencilBufferAvailable;
 895
 896     Graphics::RenderTarget*           currentRenderTarget = nullptr;
 897     Graphics::RenderPass*             currentRenderPass   = nullptr;
 898     std::vector<Graphics::ClearValue> currentClearValues{};
 899
 900     if(instruction.mFrameBuffer)
 901     {
 902       // Ensure graphics framebuffer is created, bind attachments and create render passes
 903       // Only happens once per framebuffer. If the create fails, e.g. no attachments yet,
 904       // then don't render to this framebuffer.
 905       if(!instruction.mFrameBuffer->GetGraphicsObject())
 906       {
 907         const bool created = instruction.mFrameBuffer->CreateGraphicsObjects();
 908         if(!created)
 909         {
 910           continue;
 911         }
 912       }
 913
 914       auto& clearValues = instruction.mFrameBuffer->GetGraphicsRenderPassClearValues();
 915
 916       // Set the clear color for first color attachment
 917       if(instruction.mIsClearColorSet && !clearValues.empty())
 918       {
 919         clearValues[0].color = {
 920           instruction.mClearColor.r,
 921           instruction.mClearColor.g,
 922           instruction.mClearColor.b,
 923           instruction.mClearColor.a};
 924       }
 925
 926       currentClearValues = clearValues;
 927
 928       auto loadOp = instruction.mIsClearColorSet ? Graphics::AttachmentLoadOp::CLEAR : Graphics::AttachmentLoadOp::LOAD;
 929
 930       // offscreen buffer
 931       currentRenderTarget = instruction.mFrameBuffer->GetGraphicsRenderTarget();
 932       currentRenderPass   = instruction.mFrameBuffer->GetGraphicsRenderPass(loadOp, Graphics::AttachmentStoreOp::STORE);
 933     }
 934     else // no framebuffer
 935     {
 936       // surface
 937       auto& clearValues = sceneObject->GetGraphicsRenderPassClearValues();
 938
 939       if(instruction.mIsClearColorSet)
 940       {
 941         clearValues[0].color = {
 942           instruction.mClearColor.r,
 943           instruction.mClearColor.g,
 944           instruction.mClearColor.b,
 945           instruction.mClearColor.a};
 946       }
 947
 948       currentClearValues = clearValues;
 949
 950       // @todo SceneObject should already have the depth clear / stencil clear in the clearValues array.
 951       // if the window has a depth/stencil buffer.
 952       if((depthBufferAvailable == Integration::DepthBufferAvailable::TRUE ||
 953           stencilBufferAvailable == Integration::StencilBufferAvailable::TRUE) &&
 954          (currentClearValues.size() <= 1))
 955       {
 956         currentClearValues.emplace_back();
 957         currentClearValues.back().depthStencil.depth   = 0;
 958         currentClearValues.back().depthStencil.stencil = 0;
 959       }
 960
 961       auto loadOp = instruction.mIsClearColorSet ? Graphics::AttachmentLoadOp::CLEAR : Graphics::AttachmentLoadOp::LOAD;
 962
 963       currentRenderTarget = sceneObject->GetSurfaceRenderTarget();
 964       currentRenderPass   = sceneObject->GetGraphicsRenderPass(loadOp, Graphics::AttachmentStoreOp::STORE);
 965     }
 966
 967     targetstoPresent.emplace_back(currentRenderTarget);
 968
 969     // reset the program matrices for all programs once per frame
 970     // this ensures we will set view and projection matrix once per program per camera
 971     mImpl->programController.ResetProgramMatrices();
 972
 973     if(instruction.mFrameBuffer)
 974     {
 975       // For each offscreen buffer, update the dependency list with the new texture id used by this frame buffer.
 976       for(unsigned int i0 = 0, i1 = instruction.mFrameBuffer->GetColorAttachmentCount(); i0 < i1; ++i0)
 977       {
 978         mImpl->textureDependencyList.PushBack(instruction.mFrameBuffer->GetTexture(i0));
 979       }
 980     }
 981
 982     if(!instruction.mIgnoreRenderToFbo && (instruction.mFrameBuffer != nullptr))
 983     {
 984       // Offscreen buffer rendering
 985       if(instruction.mIsViewportSet)
 986       {
 987         // For Viewport the lower-left corner is (0,0)
 988         const int32_t y = (instruction.mFrameBuffer->GetHeight() - instruction.mViewport.height) - instruction.mViewport.y;
 989         viewportRect.Set(instruction.mViewport.x, y, instruction.mViewport.width, instruction.mViewport.height);
 990       }
 991       else
 992       {
 993         viewportRect.Set(0, 0, instruction.mFrameBuffer->GetWidth(), instruction.mFrameBuffer->GetHeight());
 994       }
 995       surfaceOrientation = 0;
 996     }
 997     else // No Offscreen frame buffer rendering
 998     {
 999       // Check whether a viewport is specified, otherwise the full surface size is used
1000       if(instruction.mIsViewportSet)
1001       {
1002         // For Viewport the lower-left corner is (0,0)
1003         const int32_t y = (surfaceRect.height - instruction.mViewport.height) - instruction.mViewport.y;
1004         viewportRect.Set(instruction.mViewport.x, y, instruction.mViewport.width, instruction.mViewport.height);
1005       }
1006       else
1007       {
1008         viewportRect = surfaceRect;
1009       }
1010     }
1011
1012     // Set surface orientation
1013     // @todo Inform graphics impl by another route.
1014     // was: mImpl->currentContext->SetSurfaceOrientation(surfaceOrientation);
1015
1016     /*** Clear region of framebuffer or surface before drawing ***/
1017     bool clearFullFrameRect = (surfaceRect == viewportRect);
1018     if(instruction.mFrameBuffer != nullptr)
1019     {
1020       Viewport frameRect(0, 0, instruction.mFrameBuffer->GetWidth(), instruction.mFrameBuffer->GetHeight());
1021       clearFullFrameRect = (frameRect == viewportRect);
1022     }
1023
1024     if(!clippingRect.IsEmpty())
1025     {
1026       if(!clippingRect.Intersect(viewportRect))
1027       {
1028         DALI_LOG_ERROR("Invalid clipping rect %d %d %d %d\n", clippingRect.x, clippingRect.y, clippingRect.width, clippingRect.height);
1029         clippingRect = Rect<int>();
1030       }
1031       clearFullFrameRect = false;
1032     }
1033
1034     Graphics::Rect2D scissorArea{viewportRect.x, viewportRect.y, uint32_t(viewportRect.width), uint32_t(viewportRect.height)};
1035     if(instruction.mIsClearColorSet)
1036     {
1037       if(!clearFullFrameRect)
1038       {
1039         if(!clippingRect.IsEmpty())
1040         {
1041           scissorArea = {clippingRect.x, clippingRect.y, uint32_t(clippingRect.width), uint32_t(clippingRect.height)};
1042         }
1043       }
1044     }
1045
1046     // Scissor's value should be set based on the default system coordinates.
1047     // When the surface is rotated, the input values already were set with the rotated angle.
1048     // So, re-calculation is needed.
1049     scissorArea = RecalculateScissorArea(scissorArea, surfaceOrientation, surfaceRect);
1050
1051     // Begin render pass
1052     mainCommandBuffer->BeginRenderPass(
1053       currentRenderPass,
1054       currentRenderTarget,
1055       scissorArea,
1056       currentClearValues);
1057
1058     mainCommandBuffer->SetViewport({float(viewportRect.x),
1059                                     float(viewportRect.y),
1060                                     float(viewportRect.width),
1061                                     float(viewportRect.height)});
1062
1063     // Clear the list of bound textures
1064     mImpl->boundTextures.Clear();
1065
1066     mImpl->renderAlgorithms.ProcessRenderInstruction(
1067       instruction,
1068       mImpl->renderBufferIndex,
1069       depthBufferAvailable,
1070       stencilBufferAvailable,
1071       mImpl->boundTextures,
1072       viewportRect,
1073       clippingRect,
1074       surfaceOrientation,
1075       Uint16Pair(surfaceRect.width, surfaceRect.height));
1076
1077     Graphics::SyncObject* syncObject{nullptr};
1078     // If the render instruction has an associated render tracker (owned separately)
1079     // and framebuffer, create a one shot sync object, and use it to determine when
1080     // the render pass has finished executing on GPU.
1081     if(instruction.mRenderTracker && instruction.mFrameBuffer)
1082     {
1083       syncObject                 = instruction.mRenderTracker->CreateSyncObject(mImpl->graphicsController);
1084       instruction.mRenderTracker = nullptr;
1085     }
1086     mainCommandBuffer->EndRenderPass(syncObject);
1087   }
1088
1089   // Flush UBOs
1090   mImpl->uniformBufferManager->Flush(sceneObject, renderToFbo);
1091
1092   mImpl->renderAlgorithms.SubmitCommandBuffer();
1093   mImpl->commandBufferSubmitted = true;
1094
1095   std::sort(targetstoPresent.begin(), targetstoPresent.end());
1096
1097   Graphics::RenderTarget* rt = nullptr;
1098   for(auto& target : targetstoPresent)
1099   {
1100     if(target != rt)
1101     {
1102       mImpl->graphicsController.PresentRenderTarget(target);
1103       rt = target;
1104     }
1105   }
1106 }
1107
1108 void RenderManager::PostRender()
1109 {
1110   if(!mImpl->commandBufferSubmitted)
1111   {
1112     // Rendering is skipped but there may be pending tasks. Flush them.
1113     Graphics::SubmitInfo submitInfo;
1114     submitInfo.cmdBuffer.clear(); // Only flush
1115     submitInfo.flags = 0 | Graphics::SubmitFlagBits::FLUSH;
1116     mImpl->graphicsController.SubmitCommandBuffers(submitInfo);
1117
1118     mImpl->commandBufferSubmitted = true;
1119   }
1120
1121   // Notify RenderGeometries that rendering has finished
1122   for(auto&& iter : mImpl->geometryContainer)
1123   {
1124     iter->OnRenderFinished();
1125   }
1126
1127   // Notify updated RenderTexture that rendering has finished
1128   for(auto&& iter : mImpl->updatedTextures)
1129   {
1130     iter->OnRenderFinished();
1131   }
1132   mImpl->updatedTextures.Clear();
1133
1134   mImpl->UpdateTrackers();
1135
1136   uint32_t count = 0u;
1137   for(auto& scene : mImpl->sceneContainer)
1138   {
1139     count += scene->GetRenderInstructions().Count(mImpl->renderBufferIndex);
1140   }
1141
1142   const bool haveInstructions = count > 0u;
1143
1144   // If this frame was rendered due to instructions existing, we mark this so we know to clear the next frame.
1145   mImpl->lastFrameWasRendered = haveInstructions;
1146
1147   /**
1148    * The rendering has finished; swap to the next buffer.
1149    * Ideally the update has just finished using this buffer; otherwise the render thread
1150    * should block until the update has finished.
1151    */
1152   mImpl->renderBufferIndex = (0 != mImpl->renderBufferIndex) ? 0 : 1;
1153
1154   DALI_PRINT_RENDER_END();
1155 }
1156
1157 } // namespace SceneGraph
1158
1159 } // namespace Internal
1160
1161 } // namespace Dali