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<Render::TextureKey>        updatedTextures{}; ///< The updated texture list
 207
 208   uint32_t    frameCount{0u};                                                    ///< The current frame count
 209   BufferIndex renderBufferIndex{SceneGraphBuffers::INITIAL_UPDATE_BUFFER_INDEX}; ///< The index of the buffer to read from;
 210
 211   bool lastFrameWasRendered{false}; ///< Keeps track of the last frame being rendered due to having render instructions
 212   bool commandBufferSubmitted{false};
 213 };
 214
 215 RenderManager* RenderManager::New(Graphics::Controller&               graphicsController,
 216                                   Integration::DepthBufferAvailable   depthBufferAvailable,
 217                                   Integration::StencilBufferAvailable stencilBufferAvailable,
 218                                   Integration::PartialUpdateAvailable partialUpdateAvailable)
 219 {
 220   auto* manager  = new RenderManager;
 221   manager->mImpl = new Impl(graphicsController,
 222                             depthBufferAvailable,
 223                             stencilBufferAvailable,
 224                             partialUpdateAvailable);
 225   return manager;
 226 }
 227
 228 RenderManager::RenderManager()
 229 : mImpl(nullptr)
 230 {
 231 }
 232
 233 RenderManager::~RenderManager()
 234 {
 235   delete mImpl;
 236 }
 237
 238 RenderQueue& RenderManager::GetRenderQueue()
 239 {
 240   return mImpl->renderQueue;
 241 }
 242
 243 void RenderManager::SetShaderSaver(ShaderSaver& upstream)
 244 {
 245 }
 246
 247 void RenderManager::AddRenderer(const Render::RendererKey& renderer)
 248 {
 249   // Initialize the renderer as we are now in render thread
 250   renderer->Initialize(mImpl->graphicsController, mImpl->programController, mImpl->shaderCache, *(mImpl->uniformBufferManager.get()), *(mImpl->pipelineCache.get()));
 251
 252   mImpl->rendererContainer.PushBack(renderer);
 253 }
 254
 255 void RenderManager::RemoveRenderer(const Render::RendererKey& renderer)
 256 {
 257   mImpl->rendererContainer.EraseKey(renderer);
 258 }
 259
 260 void RenderManager::AddSampler(OwnerPointer<Render::Sampler>& sampler)
 261 {
 262   sampler->Initialize(mImpl->graphicsController);
 263   mImpl->samplerContainer.PushBack(sampler.Release());
 264 }
 265
 266 void RenderManager::RemoveSampler(Render::Sampler* sampler)
 267 {
 268   mImpl->samplerContainer.EraseObject(sampler);
 269 }
 270
 271 void RenderManager::AddTexture(const Render::TextureKey& textureKey)
 272 {
 273   DALI_ASSERT_DEBUG(textureKey && "Trying to add empty texture key");
 274
 275   textureKey->Initialize(mImpl->graphicsController, *this);
 276   mImpl->textureContainer.PushBack(textureKey);
 277   mImpl->updatedTextures.PushBack(textureKey);
 278 }
 279
 280 void RenderManager::RemoveTexture(const Render::TextureKey& textureKey)
 281 {
 282   DALI_ASSERT_DEBUG(textureKey && "Trying to remove empty texture key");
 283
 284   // Find the texture, use std::find so we can do the erase by iterator safely
 285   auto iter = std::find(mImpl->textureContainer.Begin(), mImpl->textureContainer.End(), textureKey);
 286
 287   if(iter != mImpl->textureContainer.End())
 288   {
 289     textureKey->Destroy();
 290     mImpl->textureContainer.Erase(iter); // Texture found; now destroy it
 291   }
 292 }
 293
 294 void RenderManager::UploadTexture(const Render::TextureKey& textureKey, PixelDataPtr pixelData, const Graphics::UploadParams& params)
 295 {
 296   DALI_ASSERT_DEBUG(textureKey && "Trying to upload to empty texture key");
 297   textureKey->Upload(pixelData, params);
 298
 299   mImpl->updatedTextures.PushBack(textureKey);
 300 }
 301
 302 void RenderManager::GenerateMipmaps(const Render::TextureKey& textureKey)
 303 {
 304   DALI_ASSERT_DEBUG(textureKey && "Trying to generate mipmaps on empty texture key");
 305   textureKey->GenerateMipmaps();
 306
 307   mImpl->updatedTextures.PushBack(textureKey);
 308 }
 309
 310 void RenderManager::SetTextureSize(const Render::TextureKey& textureKey, const Dali::ImageDimensions& size)
 311 {
 312   DALI_ASSERT_DEBUG(textureKey && "Trying to set size on empty texture key");
 313   textureKey->SetWidth(size.GetWidth());
 314   textureKey->SetHeight(size.GetHeight());
 315
 316   mImpl->updatedTextures.PushBack(textureKey);
 317 }
 318
 319 void RenderManager::SetTextureFormat(const Render::TextureKey& textureKey, Dali::Pixel::Format pixelFormat)
 320 {
 321   DALI_ASSERT_DEBUG(textureKey && "Trying to set pixel format on empty texture key");
 322   textureKey->SetPixelFormat(pixelFormat);
 323
 324   mImpl->updatedTextures.PushBack(textureKey);
 325 }
 326
 327 void RenderManager::SetTextureUpdated(const Render::TextureKey& textureKey)
 328 {
 329   DALI_ASSERT_DEBUG(textureKey && "Trying to set updated on empty texture key");
 330   textureKey->SetUpdated(true);
 331
 332   mImpl->updatedTextures.PushBack(textureKey);
 333 }
 334
 335 void RenderManager::SetFilterMode(Render::Sampler* sampler, uint32_t minFilterMode, uint32_t magFilterMode)
 336 {
 337   sampler->SetFilterMode(static_cast<Dali::FilterMode::Type>(minFilterMode),
 338                          static_cast<Dali::FilterMode::Type>(magFilterMode));
 339 }
 340
 341 void RenderManager::SetWrapMode(Render::Sampler* sampler, uint32_t rWrapMode, uint32_t sWrapMode, uint32_t tWrapMode)
 342 {
 343   sampler->SetWrapMode(static_cast<Dali::WrapMode::Type>(rWrapMode),
 344                        static_cast<Dali::WrapMode::Type>(sWrapMode),
 345                        static_cast<Dali::WrapMode::Type>(tWrapMode));
 346 }
 347
 348 void RenderManager::AddFrameBuffer(OwnerPointer<Render::FrameBuffer>& frameBuffer)
 349 {
 350   Render::FrameBuffer* frameBufferPtr = frameBuffer.Release();
 351   mImpl->frameBufferContainer.PushBack(frameBufferPtr);
 352   frameBufferPtr->Initialize(mImpl->graphicsController);
 353 }
 354
 355 void RenderManager::RemoveFrameBuffer(Render::FrameBuffer* frameBuffer)
 356 {
 357   DALI_ASSERT_DEBUG(nullptr != frameBuffer);
 358
 359   // Find the framebuffer, use OrderedSet.Find so we can safely do the erase
 360   auto iter = mImpl->frameBufferContainer.Find(frameBuffer);
 361
 362   if(iter != mImpl->frameBufferContainer.End())
 363   {
 364     frameBuffer->Destroy();
 365     mImpl->frameBufferContainer.Erase(iter); // frameBuffer found; now destroy it
 366   }
 367 }
 368
 369 void RenderManager::InitializeScene(SceneGraph::Scene* scene)
 370 {
 371   scene->Initialize(mImpl->graphicsController, mImpl->depthBufferAvailable, mImpl->stencilBufferAvailable);
 372   mImpl->sceneContainer.push_back(scene);
 373   mImpl->uniformBufferManager->RegisterScene(scene);
 374 }
 375
 376 void RenderManager::UninitializeScene(SceneGraph::Scene* scene)
 377 {
 378   mImpl->uniformBufferManager->UnregisterScene(scene);
 379   auto iter = std::find(mImpl->sceneContainer.begin(), mImpl->sceneContainer.end(), scene);
 380   if(iter != mImpl->sceneContainer.end())
 381   {
 382     mImpl->sceneContainer.erase(iter);
 383   }
 384 }
 385
 386 void RenderManager::SurfaceReplaced(SceneGraph::Scene* scene)
 387 {
 388   scene->Initialize(mImpl->graphicsController, mImpl->depthBufferAvailable, mImpl->stencilBufferAvailable);
 389 }
 390
 391 void RenderManager::AttachColorTextureToFrameBuffer(Render::FrameBuffer* frameBuffer, Render::Texture* texture, uint32_t mipmapLevel, uint32_t layer)
 392 {
 393   frameBuffer->AttachColorTexture(texture, mipmapLevel, layer);
 394 }
 395
 396 void RenderManager::AttachDepthTextureToFrameBuffer(Render::FrameBuffer* frameBuffer, Render::Texture* texture, uint32_t mipmapLevel)
 397 {
 398   frameBuffer->AttachDepthTexture(texture, mipmapLevel);
 399 }
 400
 401 void RenderManager::AttachDepthStencilTextureToFrameBuffer(Render::FrameBuffer* frameBuffer, Render::Texture* texture, uint32_t mipmapLevel)
 402 {
 403   frameBuffer->AttachDepthStencilTexture(texture, mipmapLevel);
 404 }
 405
 406 void RenderManager::SetMultiSamplingLevelToFrameBuffer(Render::FrameBuffer* frameBuffer, uint8_t multiSamplingLevel)
 407 {
 408   frameBuffer->SetMultiSamplingLevel(multiSamplingLevel);
 409 }
 410
 411 void RenderManager::AddVertexBuffer(OwnerPointer<Render::VertexBuffer>& vertexBuffer)
 412 {
 413   mImpl->vertexBufferContainer.PushBack(vertexBuffer.Release());
 414 }
 415
 416 void RenderManager::RemoveVertexBuffer(Render::VertexBuffer* vertexBuffer)
 417 {
 418   mImpl->vertexBufferContainer.EraseObject(vertexBuffer);
 419 }
 420
 421 void RenderManager::SetVertexBufferFormat(Render::VertexBuffer* vertexBuffer, OwnerPointer<Render::VertexBuffer::Format>& format)
 422 {
 423   vertexBuffer->SetFormat(format.Release());
 424 }
 425
 426 void RenderManager::SetVertexBufferData(Render::VertexBuffer* vertexBuffer, OwnerPointer<Vector<uint8_t>>& data, uint32_t size)
 427 {
 428   vertexBuffer->SetData(data.Release(), size);
 429 }
 430
 431 void RenderManager::SetVertexBufferUpdateCallback(Render::VertexBuffer* vertexBuffer, Dali::VertexBufferUpdateCallback* callback)
 432 {
 433   vertexBuffer->SetVertexBufferUpdateCallback(callback);
 434 }
 435
 436 void RenderManager::SetIndexBuffer(Render::Geometry* geometry, Render::Geometry::Uint16ContainerType& indices)
 437 {
 438   geometry->SetIndexBuffer(indices);
 439 }
 440
 441 void RenderManager::SetIndexBuffer(Render::Geometry* geometry, Render::Geometry::Uint32ContainerType& indices)
 442 {
 443   geometry->SetIndexBuffer(indices);
 444 }
 445
 446 void RenderManager::AddGeometry(OwnerPointer<Render::Geometry>& geometry)
 447 {
 448   mImpl->geometryContainer.PushBack(geometry.Release());
 449 }
 450
 451 void RenderManager::RemoveGeometry(Render::Geometry* geometry)
 452 {
 453   mImpl->geometryContainer.EraseObject(geometry);
 454 }
 455
 456 void RenderManager::AttachVertexBuffer(Render::Geometry* geometry, Render::VertexBuffer* vertexBuffer)
 457 {
 458   geometry->AddVertexBuffer(vertexBuffer);
 459 }
 460
 461 void RenderManager::RemoveVertexBuffer(Render::Geometry* geometry, Render::VertexBuffer* vertexBuffer)
 462 {
 463   geometry->RemoveVertexBuffer(vertexBuffer);
 464 }
 465
 466 void RenderManager::SetGeometryType(Render::Geometry* geometry, uint32_t geometryType)
 467 {
 468   geometry->SetType(Render::Geometry::Type(geometryType));
 469 }
 470
 471 void RenderManager::AddRenderTracker(Render::RenderTracker* renderTracker)
 472 {
 473   mImpl->AddRenderTracker(renderTracker);
 474 }
 475
 476 void RenderManager::RemoveRenderTracker(Render::RenderTracker* renderTracker)
 477 {
 478   mImpl->RemoveRenderTracker(renderTracker);
 479 }
 480
 481 void RenderManager::PreRender(Integration::RenderStatus& status, bool forceClear)
 482 {
 483   DALI_PRINT_RENDER_START(mImpl->renderBufferIndex);
 484   DALI_LOG_INFO(gLogFilter, Debug::Verbose, "\n\nNewFrame %d\n", mImpl->frameCount);
 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 totalInstructionCount = 0u;
 493   for(auto& i : mImpl->sceneContainer)
 494   {
 495     totalInstructionCount += i->GetRenderInstructions().Count(mImpl->renderBufferIndex);
 496   }
 497
 498   const bool haveInstructions = totalInstructionCount > 0u;
 499
 500   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");
 501
 502   // Only render if we have instructions to render, or the last frame was rendered (and therefore a clear is required).
 503   if(haveInstructions || mImpl->lastFrameWasRendered || forceClear)
 504   {
 505     DALI_LOG_INFO(gLogFilter, Debug::General, "Render: Processing\n");
 506
 507     // Upload the geometries
 508     for(auto&& geom : mImpl->geometryContainer)
 509     {
 510       geom->Upload(mImpl->graphicsController);
 511     }
 512   }
 513
 514   // Reset pipeline cache before rendering
 515   mImpl->pipelineCache->PreRender();
 516
 517   mImpl->commandBufferSubmitted = false;
 518 }
 519
 520 void RenderManager::PreRender(Integration::Scene& scene, std::vector<Rect<int>>& damagedRects)
 521 {
 522   if(mImpl->partialUpdateAvailable != Integration::PartialUpdateAvailable::TRUE)
 523   {
 524     return;
 525   }
 526
 527   Internal::Scene&   sceneInternal = GetImplementation(scene);
 528   SceneGraph::Scene* sceneObject   = sceneInternal.GetSceneObject();
 529
 530   if(!sceneObject || sceneObject->IsRenderingSkipped())
 531   {
 532     // We don't need to calculate dirty rects
 533     return;
 534   }
 535
 536   class DamagedRectsCleaner
 537   {
 538   public:
 539     explicit DamagedRectsCleaner(std::vector<Rect<int>>& damagedRects, Rect<int>& surfaceRect)
 540     : mDamagedRects(damagedRects),
 541       mSurfaceRect(surfaceRect),
 542       mCleanOnReturn(true)
 543     {
 544     }
 545
 546     void SetCleanOnReturn(bool cleanOnReturn)
 547     {
 548       mCleanOnReturn = cleanOnReturn;
 549     }
 550
 551     ~DamagedRectsCleaner()
 552     {
 553       if(mCleanOnReturn)
 554       {
 555         mDamagedRects.clear();
 556         mDamagedRects.push_back(mSurfaceRect);
 557       }
 558     }
 559
 560   private:
 561     std::vector<Rect<int>>& mDamagedRects;
 562     Rect<int>               mSurfaceRect;
 563     bool                    mCleanOnReturn;
 564   };
 565
 566   Rect<int32_t> surfaceRect = sceneObject->GetSurfaceRect();
 567
 568   // Clean collected dirty/damaged rects on exit if 3d layer or 3d node or other conditions.
 569   DamagedRectsCleaner damagedRectCleaner(damagedRects, surfaceRect);
 570   bool                cleanDamagedRect = false;
 571
 572   Scene::ItemsDirtyRectsContainer& itemsDirtyRects = sceneObject->GetItemsDirtyRects();
 573
 574   if(!sceneObject->IsPartialUpdateEnabled())
 575   {
 576     // Clear all dirty rects
 577     // The rects will be added when partial updated is enabled again
 578     itemsDirtyRects.clear();
 579     return;
 580   }
 581
 582   // Mark previous dirty rects in the std::unordered_map.
 583   for(auto& dirtyRectPair : itemsDirtyRects)
 584   {
 585     dirtyRectPair.second.visited = false;
 586   }
 587
 588   uint32_t instructionCount = sceneObject->GetRenderInstructions().Count(mImpl->renderBufferIndex);
 589   for(uint32_t i = 0; i < instructionCount; ++i)
 590   {
 591     RenderInstruction& instruction = sceneObject->GetRenderInstructions().At(mImpl->renderBufferIndex, i);
 592
 593     if(instruction.mFrameBuffer)
 594     {
 595       cleanDamagedRect = true;
 596       continue; // TODO: reset, we don't deal with render tasks with framebuffers (for now)
 597     }
 598
 599     const Camera* camera = instruction.GetCamera();
 600     if(camera && camera->mType == Camera::DEFAULT_TYPE && camera->mTargetPosition == Camera::DEFAULT_TARGET_POSITION)
 601     {
 602       Vector3    position;
 603       Vector3    scale;
 604       Quaternion orientation;
 605       camera->GetWorldMatrix(mImpl->renderBufferIndex).GetTransformComponents(position, orientation, scale);
 606
 607       Vector3 orientationAxis;
 608       Radian  orientationAngle;
 609       orientation.ToAxisAngle(orientationAxis, orientationAngle);
 610
 611       if(position.x > Math::MACHINE_EPSILON_10000 ||
 612          position.y > Math::MACHINE_EPSILON_10000 ||
 613          orientationAxis != Vector3(0.0f, 1.0f, 0.0f) ||
 614          orientationAngle != ANGLE_180 ||
 615          scale != Vector3(1.0f, 1.0f, 1.0f))
 616       {
 617         cleanDamagedRect = true;
 618         continue;
 619       }
 620     }
 621     else
 622     {
 623       cleanDamagedRect = true;
 624       continue;
 625     }
 626
 627     Rect<int32_t> viewportRect;
 628     if(instruction.mIsViewportSet)
 629     {
 630       const int32_t y = (surfaceRect.height - instruction.mViewport.height) - instruction.mViewport.y;
 631       viewportRect.Set(instruction.mViewport.x, y, instruction.mViewport.width, instruction.mViewport.height);
 632       if(viewportRect.IsEmpty() || !viewportRect.IsValid())
 633       {
 634         cleanDamagedRect = true;
 635         continue; // just skip funny use cases for now, empty viewport means it is set somewhere else
 636       }
 637     }
 638     else
 639     {
 640       viewportRect = surfaceRect;
 641     }
 642
 643     const Matrix* viewMatrix       = instruction.GetViewMatrix(mImpl->renderBufferIndex);
 644     const Matrix* projectionMatrix = instruction.GetProjectionMatrix(mImpl->renderBufferIndex);
 645     if(viewMatrix && projectionMatrix)
 646     {
 647       const RenderListContainer::SizeType count = instruction.RenderListCount();
 648       for(RenderListContainer::SizeType index = 0u; index < count; ++index)
 649       {
 650         const RenderList* renderList = instruction.GetRenderList(index);
 651         if(renderList)
 652         {
 653           if(!renderList->IsEmpty())
 654           {
 655             const std::size_t listCount = renderList->Count();
 656             for(uint32_t listIndex = 0u; listIndex < listCount; ++listIndex)
 657             {
 658               RenderItem& item = renderList->GetItem(listIndex);
 659               // If the item does 3D transformation, make full update
 660               if(item.mUpdateArea == Vector4::ZERO)
 661               {
 662                 cleanDamagedRect = true;
 663
 664                 // Save the full rect in the damaged list. We need it when this item is removed
 665                 DirtyRectKey dirtyRectKey(item.mNode, item.mRenderer);
 666                 auto         dirtyRectPos = itemsDirtyRects.find(dirtyRectKey);
 667                 if(dirtyRectPos != itemsDirtyRects.end())
 668                 {
 669                   // Replace the rect
 670                   dirtyRectPos->second.visited = true;
 671                   dirtyRectPos->second.rect    = surfaceRect;
 672                 }
 673                 else
 674                 {
 675                   // Else, just insert the new dirtyrect
 676                   itemsDirtyRects.insert({dirtyRectKey, surfaceRect});
 677                 }
 678                 continue;
 679               }
 680
 681               Rect<int>    rect;
 682               DirtyRectKey dirtyRectKey(item.mNode, item.mRenderer);
 683               // If the item refers to updated node or renderer.
 684               if(item.mIsUpdated ||
 685                  (item.mNode &&
 686                   (item.mNode->Updated() || (item.mRenderer && item.mRenderer->Updated()))))
 687               {
 688                 item.mIsUpdated = false;
 689
 690                 rect = CalculateUpdateArea(item, mImpl->renderBufferIndex, viewportRect);
 691                 if(rect.IsValid() && rect.Intersect(viewportRect) && !rect.IsEmpty())
 692                 {
 693                   AlignDamagedRect(rect);
 694
 695                   // Found valid dirty rect.
 696                   auto dirtyRectPos = itemsDirtyRects.find(dirtyRectKey);
 697                   if(dirtyRectPos != itemsDirtyRects.end())
 698                   {
 699                     Rect<int> currentRect = rect;
 700
 701                     // Same item, merge it with the previous rect
 702                     rect.Merge(dirtyRectPos->second.rect);
 703
 704                     // Replace the rect as current
 705                     dirtyRectPos->second.visited = true;
 706                     dirtyRectPos->second.rect    = currentRect;
 707                   }
 708                   else
 709                   {
 710                     // Else, just insert the new dirtyrect
 711                     itemsDirtyRects.insert({dirtyRectKey, rect});
 712                   }
 713
 714                   damagedRects.push_back(rect);
 715                 }
 716               }
 717               else
 718               {
 719                 // 1. The item is not dirty, the node and renderer referenced by the item are still exist.
 720                 // 2. Mark the related dirty rects as visited so they will not be removed below.
 721                 auto dirtyRectPos = itemsDirtyRects.find(dirtyRectKey);
 722                 if(dirtyRectPos != itemsDirtyRects.end())
 723                 {
 724                   dirtyRectPos->second.visited = true;
 725                 }
 726                 else
 727                 {
 728                   // The item is not in the list for some reason. Add the current rect!
 729                   rect = CalculateUpdateArea(item, mImpl->renderBufferIndex, viewportRect);
 730                   if(rect.IsValid() && rect.Intersect(viewportRect) && !rect.IsEmpty())
 731                   {
 732                     AlignDamagedRect(rect);
 733
 734                     itemsDirtyRects.insert({dirtyRectKey, rect});
 735                   }
 736                   cleanDamagedRect = true; // And make full update at this frame
 737                 }
 738               }
 739             }
 740           }
 741         }
 742       }
 743     }
 744   }
 745
 746   // Check removed nodes or removed renderers dirty rects
 747   // Note, std::unordered_map end iterator is validate if we call erase.
 748   for(auto iter = itemsDirtyRects.cbegin(), iterEnd = itemsDirtyRects.cend(); iter != iterEnd;)
 749   {
 750     if(!iter->second.visited)
 751     {
 752       damagedRects.push_back(iter->second.rect);
 753       iter = itemsDirtyRects.erase(iter);
 754     }
 755     else
 756     {
 757       ++iter;
 758     }
 759   }
 760
 761   if(sceneObject->IsNeededFullUpdate())
 762   {
 763     cleanDamagedRect = true; // And make full update at this frame
 764   }
 765
 766   if(!cleanDamagedRect)
 767   {
 768     damagedRectCleaner.SetCleanOnReturn(false);
 769   }
 770 }
 771
 772 void RenderManager::RenderScene(Integration::RenderStatus& status, Integration::Scene& scene, bool renderToFbo)
 773 {
 774   SceneGraph::Scene* sceneObject = GetImplementation(scene).GetSceneObject();
 775   if(!sceneObject)
 776   {
 777     return;
 778   }
 779
 780   Rect<int> clippingRect = sceneObject->GetSurfaceRect();
 781   RenderScene(status, scene, renderToFbo, clippingRect);
 782 }
 783
 784 void RenderManager::RenderScene(Integration::RenderStatus& status, Integration::Scene& scene, bool renderToFbo, Rect<int>& clippingRect)
 785 {
 786   if(mImpl->partialUpdateAvailable == Integration::PartialUpdateAvailable::TRUE && !renderToFbo && clippingRect.IsEmpty())
 787   {
 788     // ClippingRect is empty. Skip rendering
 789     return;
 790   }
 791
 792   // Reset main algorithms command buffer
 793   mImpl->renderAlgorithms.ResetCommandBuffer();
 794
 795   auto mainCommandBuffer = mImpl->renderAlgorithms.GetMainCommandBuffer();
 796
 797   Internal::Scene&   sceneInternal = GetImplementation(scene);
 798   SceneGraph::Scene* sceneObject   = sceneInternal.GetSceneObject();
 799   if(!sceneObject)
 800   {
 801     return;
 802   }
 803
 804   uint32_t instructionCount = sceneObject->GetRenderInstructions().Count(mImpl->renderBufferIndex);
 805
 806   std::vector<Graphics::RenderTarget*> targetstoPresent;
 807
 808   Rect<int32_t> surfaceRect = sceneObject->GetSurfaceRect();
 809   if(clippingRect == surfaceRect)
 810   {
 811     // Full rendering case
 812     // Make clippingRect empty because we're doing full rendering now if the clippingRect is empty.
 813     // To reduce side effects, keep this logic now.
 814     clippingRect = Rect<int>();
 815   }
 816
 817   // Prefetch programs before we start rendering so reflection is
 818   // ready, and we can pull exact size of UBO needed (no need to resize during drawing)
 819   auto totalSizeCPU = 0u;
 820   auto totalSizeGPU = 0u;
 821
 822   for(uint32_t i = 0; i < instructionCount; ++i)
 823   {
 824     RenderInstruction& instruction = sceneObject->GetRenderInstructions().At(mImpl->renderBufferIndex, i);
 825
 826     if((instruction.mFrameBuffer != nullptr && renderToFbo) ||
 827        (instruction.mFrameBuffer == nullptr && !renderToFbo))
 828     {
 829       for(auto j = 0u; j < instruction.RenderListCount(); ++j)
 830       {
 831         const auto& renderList = instruction.GetRenderList(j);
 832         for(auto k = 0u; k < renderList->Count(); ++k)
 833         {
 834           auto& item = renderList->GetItem(k);
 835           if(item.mRenderer && item.mRenderer->NeedsProgram())
 836           {
 837             // Prepare and store used programs for further processing
 838             auto program = item.mRenderer->PrepareProgram(instruction);
 839             if(program)
 840             {
 841               auto memoryRequirements = program->GetUniformBlocksMemoryRequirements();
 842
 843               totalSizeCPU += memoryRequirements.totalCpuSizeRequired;
 844               totalSizeGPU += memoryRequirements.totalGpuSizeRequired;
 845             }
 846           }
 847         }
 848       }
 849     }
 850   }
 851
 852   DALI_LOG_INFO(gLogFilter, Debug::Verbose, "Render scene (%s), CPU:%d GPU:%d\n", renderToFbo ? "Offscreen" : "Onscreen", totalSizeCPU, totalSizeGPU);
 853
 854   auto& uboManager = mImpl->uniformBufferManager;
 855
 856   uboManager->SetCurrentSceneRenderInfo(sceneObject, renderToFbo);
 857   uboManager->Rollback(sceneObject, renderToFbo);
 858
 859   // Respec UBOs for this frame (orphan buffers or double buffer in the GPU)
 860   if(instructionCount)
 861   {
 862     uboManager->GetUniformBufferForScene(sceneObject, renderToFbo, true)->ReSpecify(totalSizeCPU);
 863     uboManager->GetUniformBufferForScene(sceneObject, renderToFbo, false)->ReSpecify(totalSizeGPU);
 864   }
 865
 866 #if defined(DEBUG_ENABLED)
 867   auto uniformBuffer1 = uboManager->GetUniformBufferForScene(sceneObject, renderToFbo, true);
 868   auto uniformBuffer2 = uboManager->GetUniformBufferForScene(sceneObject, renderToFbo, false);
 869   if(uniformBuffer1)
 870   {
 871     DALI_LOG_INFO(gLogFilter, Debug::Verbose, "CPU buffer: Offset(%d), Cap(%d)\n", uniformBuffer1->GetCurrentOffset(), uniformBuffer1->GetCurrentCapacity());
 872   }
 873   else
 874   {
 875     DALI_LOG_INFO(gLogFilter, Debug::Verbose, "CPU buffer: nil\n");
 876   }
 877   if(uniformBuffer2)
 878   {
 879     DALI_LOG_INFO(gLogFilter, Debug::Verbose, "GPU buffer: Offset(%d), Cap(%d)\n", uniformBuffer2->GetCurrentOffset(), uniformBuffer2->GetCurrentCapacity());
 880   }
 881   else
 882   {
 883     DALI_LOG_INFO(gLogFilter, Debug::Verbose, "GPU buffer: nil\n");
 884   }
 885 #endif
 886
 887   for(uint32_t i = 0; i < instructionCount; ++i)
 888   {
 889     RenderInstruction& instruction = sceneObject->GetRenderInstructions().At(mImpl->renderBufferIndex, i);
 890
 891     if((renderToFbo && !instruction.mFrameBuffer) || (!renderToFbo && instruction.mFrameBuffer))
 892     {
 893       continue; // skip
 894     }
 895
 896     // Mark that we will require a post-render step to be performed (includes swap-buffers).
 897     status.SetNeedsPostRender(true);
 898
 899     Rect<int32_t> viewportRect;
 900
 901     int32_t surfaceOrientation = sceneObject->GetSurfaceOrientation() + sceneObject->GetScreenOrientation();
 902     if(surfaceOrientation >= 360)
 903     {
 904       surfaceOrientation -= 360;
 905     }
 906
 907     // @todo Should these be part of scene?
 908     Integration::DepthBufferAvailable   depthBufferAvailable   = mImpl->depthBufferAvailable;
 909     Integration::StencilBufferAvailable stencilBufferAvailable = mImpl->stencilBufferAvailable;
 910
 911     Graphics::RenderTarget*           currentRenderTarget = nullptr;
 912     Graphics::RenderPass*             currentRenderPass   = nullptr;
 913     std::vector<Graphics::ClearValue> currentClearValues{};
 914
 915     if(instruction.mFrameBuffer)
 916     {
 917       // Ensure graphics framebuffer is created, bind attachments and create render passes
 918       // Only happens once per framebuffer. If the create fails, e.g. no attachments yet,
 919       // then don't render to this framebuffer.
 920       if(!instruction.mFrameBuffer->GetGraphicsObject())
 921       {
 922         const bool created = instruction.mFrameBuffer->CreateGraphicsObjects();
 923         if(!created)
 924         {
 925           continue;
 926         }
 927       }
 928
 929       auto& clearValues = instruction.mFrameBuffer->GetGraphicsRenderPassClearValues();
 930
 931       // Set the clear color for first color attachment
 932       if(instruction.mIsClearColorSet && !clearValues.empty())
 933       {
 934         clearValues[0].color = {
 935           instruction.mClearColor.r,
 936           instruction.mClearColor.g,
 937           instruction.mClearColor.b,
 938           instruction.mClearColor.a};
 939       }
 940
 941       currentClearValues = clearValues;
 942
 943       auto loadOp = instruction.mIsClearColorSet ? Graphics::AttachmentLoadOp::CLEAR : Graphics::AttachmentLoadOp::LOAD;
 944
 945       // offscreen buffer
 946       currentRenderTarget = instruction.mFrameBuffer->GetGraphicsRenderTarget();
 947       currentRenderPass   = instruction.mFrameBuffer->GetGraphicsRenderPass(loadOp, Graphics::AttachmentStoreOp::STORE);
 948     }
 949     else // no framebuffer
 950     {
 951       // surface
 952       auto& clearValues = sceneObject->GetGraphicsRenderPassClearValues();
 953
 954       if(instruction.mIsClearColorSet)
 955       {
 956         clearValues[0].color = {
 957           instruction.mClearColor.r,
 958           instruction.mClearColor.g,
 959           instruction.mClearColor.b,
 960           instruction.mClearColor.a};
 961       }
 962
 963       currentClearValues = clearValues;
 964
 965       // @todo SceneObject should already have the depth clear / stencil clear in the clearValues array.
 966       // if the window has a depth/stencil buffer.
 967       if((depthBufferAvailable == Integration::DepthBufferAvailable::TRUE ||
 968           stencilBufferAvailable == Integration::StencilBufferAvailable::TRUE) &&
 969          (currentClearValues.size() <= 1))
 970       {
 971         currentClearValues.emplace_back();
 972         currentClearValues.back().depthStencil.depth   = 0;
 973         currentClearValues.back().depthStencil.stencil = 0;
 974       }
 975
 976       auto loadOp = instruction.mIsClearColorSet ? Graphics::AttachmentLoadOp::CLEAR : Graphics::AttachmentLoadOp::LOAD;
 977
 978       currentRenderTarget = sceneObject->GetSurfaceRenderTarget();
 979       currentRenderPass   = sceneObject->GetGraphicsRenderPass(loadOp, Graphics::AttachmentStoreOp::STORE);
 980     }
 981
 982     targetstoPresent.emplace_back(currentRenderTarget);
 983
 984     // reset the program matrices for all programs once per frame
 985     // this ensures we will set view and projection matrix once per program per camera
 986     mImpl->programController.ResetProgramMatrices();
 987
 988     if(!instruction.mIgnoreRenderToFbo && (instruction.mFrameBuffer != nullptr))
 989     {
 990       // Offscreen buffer rendering
 991       if(instruction.mIsViewportSet)
 992       {
 993         // For Viewport the lower-left corner is (0,0)
 994         const int32_t y = (instruction.mFrameBuffer->GetHeight() - instruction.mViewport.height) - instruction.mViewport.y;
 995         viewportRect.Set(instruction.mViewport.x, y, instruction.mViewport.width, instruction.mViewport.height);
 996       }
 997       else
 998       {
 999         viewportRect.Set(0, 0, instruction.mFrameBuffer->GetWidth(), instruction.mFrameBuffer->GetHeight());
1000       }
1001       surfaceOrientation = 0;
1002     }
1003     else // No Offscreen frame buffer rendering
1004     {
1005       // Check whether a viewport is specified, otherwise the full surface size is used
1006       if(instruction.mIsViewportSet)
1007       {
1008         // For Viewport the lower-left corner is (0,0)
1009         const int32_t y = (surfaceRect.height - instruction.mViewport.height) - instruction.mViewport.y;
1010         viewportRect.Set(instruction.mViewport.x, y, instruction.mViewport.width, instruction.mViewport.height);
1011       }
1012       else
1013       {
1014         viewportRect = surfaceRect;
1015       }
1016     }
1017
1018     // Set surface orientation
1019     // @todo Inform graphics impl by another route.
1020     // was: mImpl->currentContext->SetSurfaceOrientation(surfaceOrientation);
1021
1022     /*** Clear region of framebuffer or surface before drawing ***/
1023     bool clearFullFrameRect = (surfaceRect == viewportRect);
1024     if(instruction.mFrameBuffer != nullptr)
1025     {
1026       Viewport frameRect(0, 0, instruction.mFrameBuffer->GetWidth(), instruction.mFrameBuffer->GetHeight());
1027       clearFullFrameRect = (frameRect == viewportRect);
1028     }
1029
1030     if(!clippingRect.IsEmpty())
1031     {
1032       if(!clippingRect.Intersect(viewportRect))
1033       {
1034         DALI_LOG_ERROR("Invalid clipping rect %d %d %d %d\n", clippingRect.x, clippingRect.y, clippingRect.width, clippingRect.height);
1035         clippingRect = Rect<int>();
1036       }
1037       clearFullFrameRect = false;
1038     }
1039
1040     Graphics::Rect2D scissorArea{viewportRect.x, viewportRect.y, uint32_t(viewportRect.width), uint32_t(viewportRect.height)};
1041     if(instruction.mIsClearColorSet)
1042     {
1043       if(!clearFullFrameRect)
1044       {
1045         if(!clippingRect.IsEmpty())
1046         {
1047           scissorArea = {clippingRect.x, clippingRect.y, uint32_t(clippingRect.width), uint32_t(clippingRect.height)};
1048         }
1049       }
1050     }
1051
1052     // Scissor's value should be set based on the default system coordinates.
1053     // When the surface is rotated, the input values already were set with the rotated angle.
1054     // So, re-calculation is needed.
1055     scissorArea = RecalculateScissorArea(scissorArea, surfaceOrientation, surfaceRect);
1056
1057     // Begin render pass
1058     mainCommandBuffer->BeginRenderPass(
1059       currentRenderPass,
1060       currentRenderTarget,
1061       scissorArea,
1062       currentClearValues);
1063
1064     mainCommandBuffer->SetViewport({float(viewportRect.x),
1065                                     float(viewportRect.y),
1066                                     float(viewportRect.width),
1067                                     float(viewportRect.height)});
1068
1069     mImpl->renderAlgorithms.ProcessRenderInstruction(
1070       instruction,
1071       mImpl->renderBufferIndex,
1072       depthBufferAvailable,
1073       stencilBufferAvailable,
1074       viewportRect,
1075       clippingRect,
1076       surfaceOrientation,
1077       Uint16Pair(surfaceRect.width, surfaceRect.height));
1078
1079     Graphics::SyncObject* syncObject{nullptr};
1080     // If the render instruction has an associated render tracker (owned separately)
1081     // and framebuffer, create a one shot sync object, and use it to determine when
1082     // the render pass has finished executing on GPU.
1083     if(instruction.mRenderTracker && instruction.mFrameBuffer)
1084     {
1085       syncObject                 = instruction.mRenderTracker->CreateSyncObject(mImpl->graphicsController);
1086       instruction.mRenderTracker = nullptr;
1087     }
1088     mainCommandBuffer->EndRenderPass(syncObject);
1089   }
1090
1091   // Flush UBOs
1092   mImpl->uniformBufferManager->Flush(sceneObject, renderToFbo);
1093
1094   mImpl->renderAlgorithms.SubmitCommandBuffer();
1095   mImpl->commandBufferSubmitted = true;
1096
1097   std::sort(targetstoPresent.begin(), targetstoPresent.end());
1098
1099   Graphics::RenderTarget* rt = nullptr;
1100   for(auto& target : targetstoPresent)
1101   {
1102     if(target != rt)
1103     {
1104       mImpl->graphicsController.PresentRenderTarget(target);
1105       rt = target;
1106     }
1107   }
1108 }
1109
1110 void RenderManager::PostRender()
1111 {
1112   if(!mImpl->commandBufferSubmitted)
1113   {
1114     // Rendering is skipped but there may be pending tasks. Flush them.
1115     Graphics::SubmitInfo submitInfo;
1116     submitInfo.cmdBuffer.clear(); // Only flush
1117     submitInfo.flags = 0 | Graphics::SubmitFlagBits::FLUSH;
1118     mImpl->graphicsController.SubmitCommandBuffers(submitInfo);
1119
1120     mImpl->commandBufferSubmitted = true;
1121   }
1122
1123   // Notify RenderGeometries that rendering has finished
1124   for(auto&& iter : mImpl->geometryContainer)
1125   {
1126     iter->OnRenderFinished();
1127   }
1128
1129   // Notify updated RenderTexture that rendering has finished
1130   for(auto&& iter : mImpl->updatedTextures)
1131   {
1132     iter->OnRenderFinished();
1133   }
1134   mImpl->updatedTextures.Clear();
1135
1136   mImpl->UpdateTrackers();
1137
1138   uint32_t count = 0u;
1139   for(auto& scene : mImpl->sceneContainer)
1140   {
1141     count += scene->GetRenderInstructions().Count(mImpl->renderBufferIndex);
1142   }
1143
1144   const bool haveInstructions = count > 0u;
1145
1146   // If this frame was rendered due to instructions existing, we mark this so we know to clear the next frame.
1147   mImpl->lastFrameWasRendered = haveInstructions;
1148
1149   /**
1150    * The rendering has finished; swap to the next buffer.
1151    * Ideally the update has just finished using this buffer; otherwise the render thread
1152    * should block until the update has finished.
1153    */
1154   mImpl->renderBufferIndex = (0 != mImpl->renderBufferIndex) ? 0 : 1;
1155
1156   DALI_PRINT_RENDER_END();
1157 }
1158
1159 } // namespace SceneGraph
1160
1161 } // namespace Internal
1162
1163 } // namespace Dali