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

   1 /*
   2  * Copyright (c) 2024 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/integration-api/core.h>
  26 #include <dali/internal/common/ordered-set.h>
  27
  28 #include <dali/internal/event/common/scene-impl.h>
  29
  30 #include <dali/internal/update/common/scene-graph-scene.h>
  31 #include <dali/internal/update/nodes/scene-graph-layer.h>
  32 #include <dali/internal/update/render-tasks/scene-graph-camera.h>
  33
  34 #include <dali/internal/common/owner-key-container.h>
  35
  36 #include <dali/internal/render/common/render-algorithms.h>
  37 #include <dali/internal/render/common/render-debug.h>
  38 #include <dali/internal/render/common/render-instruction.h>
  39 #include <dali/internal/render/common/render-tracker.h>
  40 #include <dali/internal/render/queue/render-queue.h>
  41 #include <dali/internal/render/renderers/pipeline-cache.h>
  42 #include <dali/internal/render/renderers/render-frame-buffer.h>
  43 #include <dali/internal/render/renderers/render-texture.h>
  44 #include <dali/internal/render/renderers/uniform-buffer-manager.h>
  45 #include <dali/internal/render/renderers/uniform-buffer.h>
  46 #include <dali/internal/render/shaders/program-controller.h>
  47
  48 #include <memory>
  49
  50 namespace Dali
  51 {
  52 namespace Internal
  53 {
  54 namespace SceneGraph
  55 {
  56 #if defined(DEBUG_ENABLED)
  57 namespace
  58 {
  59 Debug::Filter* gLogFilter = Debug::Filter::New(Debug::NoLogging, false, "LOG_RENDER_MANAGER");
  60 } // unnamed namespace
  61 #endif
  62
  63 namespace
  64 {
  65 // TODO : Cache clean logic have some problem now. Just block it until bug resolved
  66 //constexpr uint32_t CACHE_CLEAN_FRAME_COUNT = 600u; // 60fps * 10sec
  67
  68 inline Graphics::Rect2D RecalculateScissorArea(const Graphics::Rect2D& scissorArea, int orientation, const Rect<int32_t>& viewportRect)
  69 {
  70   Graphics::Rect2D newScissorArea;
  71
  72   if(orientation == 90)
  73   {
  74     newScissorArea.x      = viewportRect.height - (scissorArea.y + scissorArea.height);
  75     newScissorArea.y      = scissorArea.x;
  76     newScissorArea.width  = scissorArea.height;
  77     newScissorArea.height = scissorArea.width;
  78   }
  79   else if(orientation == 180)
  80   {
  81     newScissorArea.x      = viewportRect.width - (scissorArea.x + scissorArea.width);
  82     newScissorArea.y      = viewportRect.height - (scissorArea.y + scissorArea.height);
  83     newScissorArea.width  = scissorArea.width;
  84     newScissorArea.height = scissorArea.height;
  85   }
  86   else if(orientation == 270)
  87   {
  88     newScissorArea.x      = scissorArea.y;
  89     newScissorArea.y      = viewportRect.width - (scissorArea.x + scissorArea.width);
  90     newScissorArea.width  = scissorArea.height;
  91     newScissorArea.height = scissorArea.width;
  92   }
  93   else
  94   {
  95     newScissorArea.x      = scissorArea.x;
  96     newScissorArea.y      = scissorArea.y;
  97     newScissorArea.width  = scissorArea.width;
  98     newScissorArea.height = scissorArea.height;
  99   }
 100   return newScissorArea;
 101 }
 102
 103 inline Rect<int32_t> CalculateUpdateArea(RenderItem& item, BufferIndex renderBufferIndex, const Rect<int32_t>& viewportRect)
 104 {
 105   Vector4 updateArea;
 106   if(item.mNode && item.mNode->IsTextureUpdateAreaUsed() && item.mRenderer)
 107   {
 108     updateArea = item.mRenderer->GetTextureUpdateArea();
 109   }
 110   else
 111   {
 112     updateArea = item.mRenderer ? item.mRenderer->GetVisualTransformedUpdateArea(renderBufferIndex, item.mUpdateArea) : item.mUpdateArea;
 113   }
 114
 115   return RenderItem::CalculateViewportSpaceAABB(item.mModelViewMatrix, Vector3(updateArea.x, updateArea.y, 0.0f), Vector3(updateArea.z, updateArea.w, 0.0f), viewportRect.width, viewportRect.height);
 116 }
 117
 118 inline void AlignDamagedRect(Rect<int32_t>& rect)
 119 {
 120   const int left   = rect.x;
 121   const int top    = rect.y;
 122   const int right  = rect.x + rect.width;
 123   const int bottom = rect.y + rect.height;
 124   rect.x           = (left / 16) * 16;
 125   rect.y           = (top / 16) * 16;
 126   rect.width       = ((right + 16) / 16) * 16 - rect.x;
 127   rect.height      = ((bottom + 16) / 16) * 16 - rect.y;
 128 }
 129 } // namespace
 130
 131 /**
 132  * Structure to contain internal data
 133  */
 134 struct RenderManager::Impl
 135 {
 136   Impl(Graphics::Controller&               graphicsController,
 137        Integration::DepthBufferAvailable   depthBufferAvailableParam,
 138        Integration::StencilBufferAvailable stencilBufferAvailableParam,
 139        Integration::PartialUpdateAvailable partialUpdateAvailableParam)
 140   : graphicsController(graphicsController),
 141     renderAlgorithms(graphicsController),
 142     programController(graphicsController),
 143     depthBufferAvailable(depthBufferAvailableParam),
 144     stencilBufferAvailable(stencilBufferAvailableParam),
 145     partialUpdateAvailable(partialUpdateAvailableParam)
 146   {
 147     uniformBufferManager = std::make_unique<Render::UniformBufferManager>(&graphicsController);
 148     pipelineCache        = std::make_unique<Render::PipelineCache>(graphicsController);
 149   }
 150
 151   ~Impl()
 152   {
 153     rendererContainer.Clear(); // clear now before the pipeline cache is deleted
 154   }
 155
 156   void AddRenderTracker(Render::RenderTracker* renderTracker)
 157   {
 158     DALI_ASSERT_DEBUG(renderTracker != nullptr);
 159     mRenderTrackers.PushBack(renderTracker);
 160   }
 161
 162   void RemoveRenderTracker(Render::RenderTracker* renderTracker)
 163   {
 164     mRenderTrackers.EraseObject(renderTracker);
 165   }
 166
 167   void UpdateTrackers()
 168   {
 169     for(auto&& iter : mRenderTrackers)
 170     {
 171       iter->PollSyncObject();
 172     }
 173   }
 174
 175   // the order is important for destruction,
 176   Graphics::Controller&           graphicsController;
 177   RenderQueue                     renderQueue;      ///< A message queue for receiving messages from the update-thread.
 178   std::vector<SceneGraph::Scene*> sceneContainer;   ///< List of pointers to the scene graph objects of the scenes
 179   Render::RenderAlgorithms        renderAlgorithms; ///< The RenderAlgorithms object is used to action the renders required by a RenderInstruction
 180
 181   OrderedSet<Render::Sampler>         samplerContainer;      ///< List of owned samplers
 182   OrderedSet<Render::FrameBuffer>     frameBufferContainer;  ///< List of owned framebuffers
 183   OrderedSet<Render::VertexBuffer>    vertexBufferContainer; ///< List of owned vertex buffers
 184   OrderedSet<Render::Geometry>        geometryContainer;     ///< List of owned Geometries
 185   OwnerKeyContainer<Render::Renderer> rendererContainer;     ///< List of owned renderers
 186   OwnerKeyContainer<Render::Texture>  textureContainer;      ///< List of owned textures
 187
 188   OrderedSet<Render::RenderTracker> mRenderTrackers; ///< List of owned render trackers
 189
 190   OwnerKeyContainer<Render::Texture> textureDiscardQueue; ///< Discarded textures
 191
 192   ProgramController programController; ///< Owner of the programs
 193
 194   std::unique_ptr<Render::UniformBufferManager> uniformBufferManager; ///< The uniform buffer manager
 195   std::unique_ptr<Render::PipelineCache>        pipelineCache;
 196
 197   Integration::DepthBufferAvailable   depthBufferAvailable;   ///< Whether the depth buffer is available
 198   Integration::StencilBufferAvailable stencilBufferAvailable; ///< Whether the stencil buffer is available
 199   Integration::PartialUpdateAvailable partialUpdateAvailable; ///< Whether the partial update is available
 200
 201   Vector<Render::TextureKey> updatedTextures{}; ///< The updated texture list
 202
 203   uint32_t    frameCount{0u};                                                    ///< The current frame count
 204   BufferIndex renderBufferIndex{SceneGraphBuffers::INITIAL_UPDATE_BUFFER_INDEX}; ///< The index of the buffer to read from;
 205
 206   bool lastFrameWasRendered{false}; ///< Keeps track of the last frame being rendered due to having render instructions
 207   bool commandBufferSubmitted{false};
 208 };
 209
 210 RenderManager* RenderManager::New(Graphics::Controller&               graphicsController,
 211                                   Integration::DepthBufferAvailable   depthBufferAvailable,
 212                                   Integration::StencilBufferAvailable stencilBufferAvailable,
 213                                   Integration::PartialUpdateAvailable partialUpdateAvailable)
 214 {
 215   auto* manager  = new RenderManager;
 216   manager->mImpl = new Impl(graphicsController,
 217                             depthBufferAvailable,
 218                             stencilBufferAvailable,
 219                             partialUpdateAvailable);
 220   return manager;
 221 }
 222
 223 RenderManager::RenderManager()
 224 : mImpl(nullptr)
 225 {
 226 }
 227
 228 RenderManager::~RenderManager()
 229 {
 230   delete mImpl;
 231 }
 232
 233 void RenderManager::ContextDestroyed()
 234 {
 235   mImpl->uniformBufferManager->ContextDestroyed();
 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->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     // Destroy texture.
 290     textureKey->Destroy();
 291
 292     // Transfer ownership to the discard queue, this keeps the object alive, until the render-thread has finished with it
 293     mImpl->textureDiscardQueue.PushBack(mImpl->textureContainer.Release(iter));
 294   }
 295 }
 296
 297 void RenderManager::UploadTexture(const Render::TextureKey& textureKey, PixelDataPtr pixelData, const Graphics::UploadParams& params)
 298 {
 299   DALI_ASSERT_DEBUG(textureKey && "Trying to upload to empty texture key");
 300   textureKey->Upload(pixelData, params);
 301
 302   mImpl->updatedTextures.PushBack(textureKey);
 303 }
 304
 305 void RenderManager::GenerateMipmaps(const Render::TextureKey& textureKey)
 306 {
 307   DALI_ASSERT_DEBUG(textureKey && "Trying to generate mipmaps on empty texture key");
 308   textureKey->GenerateMipmaps();
 309
 310   mImpl->updatedTextures.PushBack(textureKey);
 311 }
 312
 313 void RenderManager::SetTextureSize(const Render::TextureKey& textureKey, const Dali::ImageDimensions& size)
 314 {
 315   DALI_ASSERT_DEBUG(textureKey && "Trying to set size on empty texture key");
 316   textureKey->SetWidth(size.GetWidth());
 317   textureKey->SetHeight(size.GetHeight());
 318 }
 319
 320 void RenderManager::SetTextureFormat(const Render::TextureKey& textureKey, Dali::Pixel::Format pixelFormat)
 321 {
 322   DALI_ASSERT_DEBUG(textureKey && "Trying to set pixel format on empty texture key");
 323   textureKey->SetPixelFormat(pixelFormat);
 324 }
 325
 326 void RenderManager::SetTextureUpdated(const Render::TextureKey& textureKey)
 327 {
 328   DALI_ASSERT_DEBUG(textureKey && "Trying to set updated on empty texture key");
 329   textureKey->SetUpdated(true);
 330
 331   mImpl->updatedTextures.PushBack(textureKey);
 332 }
 333
 334 void RenderManager::SetFilterMode(Render::Sampler* sampler, uint32_t minFilterMode, uint32_t magFilterMode)
 335 {
 336   sampler->SetFilterMode(static_cast<Dali::FilterMode::Type>(minFilterMode),
 337                          static_cast<Dali::FilterMode::Type>(magFilterMode));
 338 }
 339
 340 void RenderManager::SetWrapMode(Render::Sampler* sampler, uint32_t rWrapMode, uint32_t sWrapMode, uint32_t tWrapMode)
 341 {
 342   sampler->SetWrapMode(static_cast<Dali::WrapMode::Type>(rWrapMode),
 343                        static_cast<Dali::WrapMode::Type>(sWrapMode),
 344                        static_cast<Dali::WrapMode::Type>(tWrapMode));
 345 }
 346
 347 void RenderManager::AddFrameBuffer(OwnerPointer<Render::FrameBuffer>& frameBuffer)
 348 {
 349   Render::FrameBuffer* frameBufferPtr = frameBuffer.Release();
 350   mImpl->frameBufferContainer.PushBack(frameBufferPtr);
 351   frameBufferPtr->Initialize(mImpl->graphicsController);
 352 }
 353
 354 void RenderManager::RemoveFrameBuffer(Render::FrameBuffer* frameBuffer)
 355 {
 356   DALI_ASSERT_DEBUG(nullptr != frameBuffer);
 357
 358   // Find the framebuffer, use OrderedSet.Find so we can safely do the erase
 359   auto iter = mImpl->frameBufferContainer.Find(frameBuffer);
 360
 361   if(iter != mImpl->frameBufferContainer.End())
 362   {
 363     frameBuffer->Destroy();
 364     mImpl->frameBufferContainer.Erase(iter); // frameBuffer found; now destroy it
 365   }
 366 }
 367
 368 void RenderManager::InitializeScene(SceneGraph::Scene* scene)
 369 {
 370   scene->Initialize(mImpl->graphicsController, mImpl->depthBufferAvailable, mImpl->stencilBufferAvailable);
 371   mImpl->sceneContainer.push_back(scene);
 372   mImpl->uniformBufferManager->RegisterScene(scene);
 373 }
 374
 375 void RenderManager::UninitializeScene(SceneGraph::Scene* scene)
 376 {
 377   mImpl->uniformBufferManager->UnregisterScene(scene);
 378   auto iter = std::find(mImpl->sceneContainer.begin(), mImpl->sceneContainer.end(), scene);
 379   if(iter != mImpl->sceneContainer.end())
 380   {
 381     mImpl->sceneContainer.erase(iter);
 382   }
 383 }
 384
 385 void RenderManager::SurfaceReplaced(SceneGraph::Scene* scene)
 386 {
 387   scene->Initialize(mImpl->graphicsController, mImpl->depthBufferAvailable, mImpl->stencilBufferAvailable);
 388 }
 389
 390 void RenderManager::AttachColorTextureToFrameBuffer(Render::FrameBuffer* frameBuffer, Render::Texture* texture, uint32_t mipmapLevel, uint32_t layer)
 391 {
 392   frameBuffer->AttachColorTexture(texture, mipmapLevel, layer);
 393 }
 394
 395 void RenderManager::AttachDepthTextureToFrameBuffer(Render::FrameBuffer* frameBuffer, Render::Texture* texture, uint32_t mipmapLevel)
 396 {
 397   frameBuffer->AttachDepthTexture(texture, mipmapLevel);
 398 }
 399
 400 void RenderManager::AttachDepthStencilTextureToFrameBuffer(Render::FrameBuffer* frameBuffer, Render::Texture* texture, uint32_t mipmapLevel)
 401 {
 402   frameBuffer->AttachDepthStencilTexture(texture, mipmapLevel);
 403 }
 404
 405 void RenderManager::SetMultiSamplingLevelToFrameBuffer(Render::FrameBuffer* frameBuffer, uint8_t multiSamplingLevel)
 406 {
 407   frameBuffer->SetMultiSamplingLevel(multiSamplingLevel);
 408 }
 409
 410 void RenderManager::AddVertexBuffer(OwnerPointer<Render::VertexBuffer>& vertexBuffer)
 411 {
 412   mImpl->vertexBufferContainer.PushBack(vertexBuffer.Release());
 413 }
 414
 415 void RenderManager::RemoveVertexBuffer(Render::VertexBuffer* vertexBuffer)
 416 {
 417   mImpl->vertexBufferContainer.EraseObject(vertexBuffer);
 418 }
 419
 420 void RenderManager::SetVertexBufferFormat(Render::VertexBuffer* vertexBuffer, OwnerPointer<Render::VertexBuffer::Format>& format)
 421 {
 422   vertexBuffer->SetFormat(format.Release());
 423 }
 424
 425 void RenderManager::SetVertexBufferData(Render::VertexBuffer* vertexBuffer, OwnerPointer<Vector<uint8_t>>& data, uint32_t size)
 426 {
 427   vertexBuffer->SetData(data.Release(), size);
 428 }
 429
 430 void RenderManager::SetVertexBufferUpdateCallback(Render::VertexBuffer* vertexBuffer, Dali::VertexBufferUpdateCallback* callback)
 431 {
 432   vertexBuffer->SetVertexBufferUpdateCallback(callback);
 433 }
 434
 435 void RenderManager::SetIndexBuffer(Render::Geometry* geometry, Render::Geometry::Uint16ContainerType& indices)
 436 {
 437   geometry->SetIndexBuffer(indices);
 438 }
 439
 440 void RenderManager::SetIndexBuffer(Render::Geometry* geometry, Render::Geometry::Uint32ContainerType& indices)
 441 {
 442   geometry->SetIndexBuffer(indices);
 443 }
 444
 445 void RenderManager::AddGeometry(OwnerPointer<Render::Geometry>& geometry)
 446 {
 447   mImpl->geometryContainer.PushBack(geometry.Release());
 448 }
 449
 450 void RenderManager::RemoveGeometry(Render::Geometry* geometry)
 451 {
 452   mImpl->geometryContainer.EraseObject(geometry);
 453 }
 454
 455 void RenderManager::AttachVertexBuffer(Render::Geometry* geometry, Render::VertexBuffer* vertexBuffer)
 456 {
 457   geometry->AddVertexBuffer(vertexBuffer);
 458 }
 459
 460 void RenderManager::RemoveVertexBuffer(Render::Geometry* geometry, Render::VertexBuffer* vertexBuffer)
 461 {
 462   geometry->RemoveVertexBuffer(vertexBuffer);
 463 }
 464
 465 void RenderManager::SetGeometryType(Render::Geometry* geometry, uint32_t geometryType)
 466 {
 467   geometry->SetType(Render::Geometry::Type(geometryType));
 468 }
 469
 470 void RenderManager::AddRenderTracker(Render::RenderTracker* renderTracker)
 471 {
 472   mImpl->AddRenderTracker(renderTracker);
 473 }
 474
 475 void RenderManager::RemoveRenderTracker(Render::RenderTracker* renderTracker)
 476 {
 477   mImpl->RemoveRenderTracker(renderTracker);
 478 }
 479
 480 void RenderManager::PreRender(Integration::RenderStatus& status, bool forceClear)
 481 {
 482   DALI_PRINT_RENDER_START(mImpl->renderBufferIndex);
 483   DALI_LOG_INFO(gLogFilter, Debug::Verbose, "\n\nNewFrame %d\n", mImpl->frameCount);
 484
 485   // Increment the frame count at the beginning of each frame
 486   ++mImpl->frameCount;
 487
 488   // Process messages queued during previous update
 489   mImpl->renderQueue.ProcessMessages(mImpl->renderBufferIndex);
 490
 491   uint32_t totalInstructionCount = 0u;
 492   for(auto& i : mImpl->sceneContainer)
 493   {
 494     totalInstructionCount += i->GetRenderInstructions().Count(mImpl->renderBufferIndex);
 495   }
 496
 497   const bool haveInstructions = totalInstructionCount > 0u;
 498
 499   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");
 500
 501   // Only render if we have instructions to render, or the last frame was rendered (and therefore a clear is required).
 502   if(haveInstructions || mImpl->lastFrameWasRendered || forceClear)
 503   {
 504     DALI_LOG_INFO(gLogFilter, Debug::General, "Render: Processing\n");
 505
 506     // Upload the geometries
 507     for(auto&& geom : mImpl->geometryContainer)
 508     {
 509       geom->Upload(mImpl->graphicsController);
 510     }
 511   }
 512
 513   // Reset pipeline cache before rendering
 514   mImpl->pipelineCache->PreRender();
 515
 516   // Let we collect reference counts during CACHE_CLEAN_FRAME_COUNT frames.
 517   // TODO : Cache clean logic have some problem now. Just block it until bug resolved
 518   /*
 519   if(mImpl->frameCount % CACHE_CLEAN_FRAME_COUNT == 1)
 520   {
 521     mImpl->programController.ResetReferenceCount();
 522   }
 523   */
 524
 525   mImpl->commandBufferSubmitted = false;
 526 }
 527
 528 void RenderManager::PreRender(Integration::Scene& scene, std::vector<Rect<int>>& damagedRects)
 529 {
 530   if(mImpl->partialUpdateAvailable != Integration::PartialUpdateAvailable::TRUE)
 531   {
 532     return;
 533   }
 534
 535   Internal::Scene&   sceneInternal = GetImplementation(scene);
 536   SceneGraph::Scene* sceneObject   = sceneInternal.GetSceneObject();
 537
 538   if(!sceneObject || sceneObject->IsRenderingSkipped())
 539   {
 540     // We don't need to calculate dirty rects
 541     return;
 542   }
 543
 544   class DamagedRectsCleaner
 545   {
 546   public:
 547     explicit DamagedRectsCleaner(std::vector<Rect<int>>& damagedRects, Rect<int>& surfaceRect)
 548     : mDamagedRects(damagedRects),
 549       mSurfaceRect(surfaceRect),
 550       mCleanOnReturn(true)
 551     {
 552     }
 553
 554     void SetCleanOnReturn(bool cleanOnReturn)
 555     {
 556       mCleanOnReturn = cleanOnReturn;
 557     }
 558
 559     ~DamagedRectsCleaner()
 560     {
 561       if(mCleanOnReturn)
 562       {
 563         mDamagedRects.clear();
 564         mDamagedRects.push_back(mSurfaceRect);
 565       }
 566     }
 567
 568   private:
 569     std::vector<Rect<int>>& mDamagedRects;
 570     Rect<int>               mSurfaceRect;
 571     bool                    mCleanOnReturn;
 572   };
 573
 574   Rect<int32_t> surfaceRect = sceneObject->GetSurfaceRect();
 575
 576   // Clean collected dirty/damaged rects on exit if 3d layer or 3d node or other conditions.
 577   DamagedRectsCleaner damagedRectCleaner(damagedRects, surfaceRect);
 578   bool                cleanDamagedRect = false;
 579
 580   Scene::ItemsDirtyRectsContainer& itemsDirtyRects = sceneObject->GetItemsDirtyRects();
 581
 582   if(!sceneObject->IsPartialUpdateEnabled())
 583   {
 584     // Clear all dirty rects
 585     // The rects will be added when partial updated is enabled again
 586     itemsDirtyRects.clear();
 587     return;
 588   }
 589
 590   // Mark previous dirty rects in the std::unordered_map.
 591   for(auto& dirtyRectPair : itemsDirtyRects)
 592   {
 593     dirtyRectPair.second.visited = false;
 594   }
 595
 596   uint32_t instructionCount = sceneObject->GetRenderInstructions().Count(mImpl->renderBufferIndex);
 597   for(uint32_t i = 0; i < instructionCount; ++i)
 598   {
 599     RenderInstruction& instruction = sceneObject->GetRenderInstructions().At(mImpl->renderBufferIndex, i);
 600
 601     if(instruction.mFrameBuffer)
 602     {
 603       cleanDamagedRect = true;
 604       continue; // TODO: reset, we don't deal with render tasks with framebuffers (for now)
 605     }
 606
 607     const Camera* camera = instruction.GetCamera();
 608     if(camera && camera->mType == Camera::DEFAULT_TYPE && camera->mTargetPosition == Camera::DEFAULT_TARGET_POSITION)
 609     {
 610       Vector3    position;
 611       Vector3    scale;
 612       Quaternion orientation;
 613       camera->GetWorldMatrix(mImpl->renderBufferIndex).GetTransformComponents(position, orientation, scale);
 614
 615       Vector3 orientationAxis;
 616       Radian  orientationAngle;
 617       orientation.ToAxisAngle(orientationAxis, orientationAngle);
 618
 619       if(position.x > Math::MACHINE_EPSILON_10000 ||
 620          position.y > Math::MACHINE_EPSILON_10000 ||
 621          orientationAxis != Vector3(0.0f, 1.0f, 0.0f) ||
 622          orientationAngle != ANGLE_180 ||
 623          scale != Vector3(1.0f, 1.0f, 1.0f))
 624       {
 625         cleanDamagedRect = true;
 626         continue;
 627       }
 628     }
 629     else
 630     {
 631       cleanDamagedRect = true;
 632       continue;
 633     }
 634
 635     Rect<int32_t> viewportRect;
 636     if(instruction.mIsViewportSet)
 637     {
 638       const int32_t y = (surfaceRect.height - instruction.mViewport.height) - instruction.mViewport.y;
 639       viewportRect.Set(instruction.mViewport.x, y, instruction.mViewport.width, instruction.mViewport.height);
 640       if(viewportRect.IsEmpty() || !viewportRect.IsValid())
 641       {
 642         cleanDamagedRect = true;
 643         continue; // just skip funny use cases for now, empty viewport means it is set somewhere else
 644       }
 645     }
 646     else
 647     {
 648       viewportRect = surfaceRect;
 649     }
 650
 651     const Matrix* viewMatrix       = instruction.GetViewMatrix(mImpl->renderBufferIndex);
 652     const Matrix* projectionMatrix = instruction.GetProjectionMatrix(mImpl->renderBufferIndex);
 653     if(viewMatrix && projectionMatrix)
 654     {
 655       const RenderListContainer::SizeType count = instruction.RenderListCount();
 656       for(RenderListContainer::SizeType index = 0u; index < count; ++index)
 657       {
 658         const RenderList* renderList = instruction.GetRenderList(index);
 659         if(renderList)
 660         {
 661           if(!renderList->IsEmpty())
 662           {
 663             const std::size_t listCount = renderList->Count();
 664             for(uint32_t listIndex = 0u; listIndex < listCount; ++listIndex)
 665             {
 666               RenderItem& item = renderList->GetItem(listIndex);
 667               // If the item does 3D transformation, make full update
 668               if(item.mUpdateArea == Vector4::ZERO)
 669               {
 670                 cleanDamagedRect = true;
 671
 672                 // Save the full rect in the damaged list. We need it when this item is removed
 673                 DirtyRectKey dirtyRectKey(item.mNode, item.mRenderer);
 674                 auto         dirtyRectPos = itemsDirtyRects.find(dirtyRectKey);
 675                 if(dirtyRectPos != itemsDirtyRects.end())
 676                 {
 677                   // Replace the rect
 678                   dirtyRectPos->second.visited = true;
 679                   dirtyRectPos->second.rect    = surfaceRect;
 680                 }
 681                 else
 682                 {
 683                   // Else, just insert the new dirtyrect
 684                   itemsDirtyRects.insert({dirtyRectKey, surfaceRect});
 685                 }
 686                 continue;
 687               }
 688
 689               Rect<int>    rect;
 690               DirtyRectKey dirtyRectKey(item.mNode, item.mRenderer);
 691               // If the item refers to updated node or renderer.
 692               if(item.mIsUpdated ||
 693                  (item.mNode &&
 694                   (item.mNode->Updated() || (item.mRenderer && item.mRenderer->Updated()))))
 695               {
 696                 item.mIsUpdated = false;
 697
 698                 rect = CalculateUpdateArea(item, mImpl->renderBufferIndex, viewportRect);
 699                 if(rect.IsValid() && rect.Intersect(viewportRect) && !rect.IsEmpty())
 700                 {
 701                   AlignDamagedRect(rect);
 702
 703                   // Found valid dirty rect.
 704                   auto dirtyRectPos = itemsDirtyRects.find(dirtyRectKey);
 705                   if(dirtyRectPos != itemsDirtyRects.end())
 706                   {
 707                     Rect<int> currentRect = rect;
 708
 709                     // Same item, merge it with the previous rect
 710                     rect.Merge(dirtyRectPos->second.rect);
 711
 712                     // Replace the rect as current
 713                     dirtyRectPos->second.visited = true;
 714                     dirtyRectPos->second.rect    = currentRect;
 715                   }
 716                   else
 717                   {
 718                     // Else, just insert the new dirtyrect
 719                     itemsDirtyRects.insert({dirtyRectKey, rect});
 720                   }
 721
 722                   damagedRects.push_back(rect);
 723                 }
 724               }
 725               else
 726               {
 727                 // 1. The item is not dirty, the node and renderer referenced by the item are still exist.
 728                 // 2. Mark the related dirty rects as visited so they will not be removed below.
 729                 auto dirtyRectPos = itemsDirtyRects.find(dirtyRectKey);
 730                 if(dirtyRectPos != itemsDirtyRects.end())
 731                 {
 732                   dirtyRectPos->second.visited = true;
 733                 }
 734                 else
 735                 {
 736                   // The item is not in the list for some reason. Add the current rect!
 737                   rect = CalculateUpdateArea(item, mImpl->renderBufferIndex, viewportRect);
 738                   if(rect.IsValid() && rect.Intersect(viewportRect) && !rect.IsEmpty())
 739                   {
 740                     AlignDamagedRect(rect);
 741
 742                     itemsDirtyRects.insert({dirtyRectKey, rect});
 743                   }
 744                   cleanDamagedRect = true; // And make full update at this frame
 745                 }
 746               }
 747             }
 748           }
 749         }
 750       }
 751     }
 752   }
 753
 754   // Check removed nodes or removed renderers dirty rects
 755   // Note, std::unordered_map end iterator is validate if we call erase.
 756   for(auto iter = itemsDirtyRects.cbegin(), iterEnd = itemsDirtyRects.cend(); iter != iterEnd;)
 757   {
 758     if(!iter->second.visited)
 759     {
 760       damagedRects.push_back(iter->second.rect);
 761       iter = itemsDirtyRects.erase(iter);
 762     }
 763     else
 764     {
 765       ++iter;
 766     }
 767   }
 768
 769   if(sceneObject->IsNeededFullUpdate())
 770   {
 771     cleanDamagedRect = true; // And make full update at this frame
 772   }
 773
 774   if(!cleanDamagedRect)
 775   {
 776     damagedRectCleaner.SetCleanOnReturn(false);
 777   }
 778 }
 779
 780 void RenderManager::RenderScene(Integration::RenderStatus& status, Integration::Scene& scene, bool renderToFbo)
 781 {
 782   SceneGraph::Scene* sceneObject = GetImplementation(scene).GetSceneObject();
 783   if(!sceneObject)
 784   {
 785     return;
 786   }
 787
 788   Rect<int> clippingRect = sceneObject->GetSurfaceRect();
 789   RenderScene(status, scene, renderToFbo, clippingRect);
 790 }
 791
 792 void RenderManager::RenderScene(Integration::RenderStatus& status, Integration::Scene& scene, bool renderToFbo, Rect<int>& clippingRect)
 793 {
 794   if(mImpl->partialUpdateAvailable == Integration::PartialUpdateAvailable::TRUE && !renderToFbo && clippingRect.IsEmpty())
 795   {
 796     // ClippingRect is empty. Skip rendering
 797     return;
 798   }
 799
 800   // Reset main algorithms command buffer
 801   mImpl->renderAlgorithms.ResetCommandBuffer();
 802
 803   auto mainCommandBuffer = mImpl->renderAlgorithms.GetMainCommandBuffer();
 804
 805   Internal::Scene&   sceneInternal = GetImplementation(scene);
 806   SceneGraph::Scene* sceneObject   = sceneInternal.GetSceneObject();
 807   if(!sceneObject)
 808   {
 809     return;
 810   }
 811
 812   uint32_t instructionCount = sceneObject->GetRenderInstructions().Count(mImpl->renderBufferIndex);
 813
 814   std::vector<Graphics::RenderTarget*> targetstoPresent;
 815
 816   Rect<int32_t> surfaceRect = sceneObject->GetSurfaceRect();
 817   if(clippingRect == surfaceRect)
 818   {
 819     // Full rendering case
 820     // Make clippingRect empty because we're doing full rendering now if the clippingRect is empty.
 821     // To reduce side effects, keep this logic now.
 822     clippingRect = Rect<int>();
 823   }
 824
 825   // Prefetch programs before we start rendering so reflection is
 826   // ready, and we can pull exact size of UBO needed (no need to resize during drawing)
 827   auto totalSizeCPU = 0u;
 828   auto totalSizeGPU = 0u;
 829
 830   for(uint32_t i = 0; i < instructionCount; ++i)
 831   {
 832     RenderInstruction& instruction = sceneObject->GetRenderInstructions().At(mImpl->renderBufferIndex, i);
 833
 834     if((instruction.mFrameBuffer != nullptr && renderToFbo) ||
 835        (instruction.mFrameBuffer == nullptr && !renderToFbo))
 836     {
 837       for(auto j = 0u; j < instruction.RenderListCount(); ++j)
 838       {
 839         const auto& renderList = instruction.GetRenderList(j);
 840         for(auto k = 0u; k < renderList->Count(); ++k)
 841         {
 842           auto& item = renderList->GetItem(k);
 843           if(item.mRenderer && item.mRenderer->NeedsProgram())
 844           {
 845             // Prepare and store used programs for further processing
 846             auto program = item.mRenderer->PrepareProgram(instruction);
 847             if(program)
 848             {
 849               const auto& memoryRequirements = program->GetUniformBlocksMemoryRequirements();
 850
 851               totalSizeCPU += memoryRequirements.totalCpuSizeRequired;
 852               totalSizeGPU += memoryRequirements.totalGpuSizeRequired;
 853             }
 854           }
 855         }
 856       }
 857     }
 858   }
 859
 860   DALI_LOG_INFO(gLogFilter, Debug::Verbose, "Render scene (%s), CPU:%d GPU:%d\n", renderToFbo ? "Offscreen" : "Onscreen", totalSizeCPU, totalSizeGPU);
 861
 862   auto& uboManager = mImpl->uniformBufferManager;
 863
 864   uboManager->SetCurrentSceneRenderInfo(sceneObject, renderToFbo);
 865   uboManager->Rollback(sceneObject, renderToFbo);
 866
 867   // Respec UBOs for this frame (orphan buffers or double buffer in the GPU)
 868   if(instructionCount)
 869   {
 870     uboManager->GetUniformBufferForScene(sceneObject, renderToFbo, true)->ReSpecify(totalSizeCPU);
 871     uboManager->GetUniformBufferForScene(sceneObject, renderToFbo, false)->ReSpecify(totalSizeGPU);
 872   }
 873
 874 #if defined(DEBUG_ENABLED)
 875   auto uniformBuffer1 = uboManager->GetUniformBufferForScene(sceneObject, renderToFbo, true);
 876   auto uniformBuffer2 = uboManager->GetUniformBufferForScene(sceneObject, renderToFbo, false);
 877   if(uniformBuffer1)
 878   {
 879     DALI_LOG_INFO(gLogFilter, Debug::Verbose, "CPU buffer: Offset(%d), Cap(%d)\n", uniformBuffer1->GetCurrentOffset(), uniformBuffer1->GetCurrentCapacity());
 880   }
 881   else
 882   {
 883     DALI_LOG_INFO(gLogFilter, Debug::Verbose, "CPU buffer: nil\n");
 884   }
 885   if(uniformBuffer2)
 886   {
 887     DALI_LOG_INFO(gLogFilter, Debug::Verbose, "GPU buffer: Offset(%d), Cap(%d)\n", uniformBuffer2->GetCurrentOffset(), uniformBuffer2->GetCurrentCapacity());
 888   }
 889   else
 890   {
 891     DALI_LOG_INFO(gLogFilter, Debug::Verbose, "GPU buffer: nil\n");
 892   }
 893 #endif
 894
 895   for(uint32_t i = 0; i < instructionCount; ++i)
 896   {
 897     RenderInstruction& instruction = sceneObject->GetRenderInstructions().At(mImpl->renderBufferIndex, i);
 898
 899     if((renderToFbo && !instruction.mFrameBuffer) || (!renderToFbo && instruction.mFrameBuffer))
 900     {
 901       continue; // skip
 902     }
 903
 904     // Mark that we will require a post-render step to be performed (includes swap-buffers).
 905     status.SetNeedsPostRender(true);
 906
 907     Rect<int32_t> viewportRect;
 908
 909     int32_t surfaceOrientation = sceneObject->GetSurfaceOrientation() + sceneObject->GetScreenOrientation();
 910     if(surfaceOrientation >= 360)
 911     {
 912       surfaceOrientation -= 360;
 913     }
 914
 915     // @todo Should these be part of scene?
 916     Integration::DepthBufferAvailable   depthBufferAvailable   = mImpl->depthBufferAvailable;
 917     Integration::StencilBufferAvailable stencilBufferAvailable = mImpl->stencilBufferAvailable;
 918
 919     Graphics::RenderTarget*           currentRenderTarget = nullptr;
 920     Graphics::RenderPass*             currentRenderPass   = nullptr;
 921     std::vector<Graphics::ClearValue> currentClearValues{};
 922
 923     if(instruction.mFrameBuffer)
 924     {
 925       // Ensure graphics framebuffer is created, bind attachments and create render passes
 926       // Only happens once per framebuffer. If the create fails, e.g. no attachments yet,
 927       // then don't render to this framebuffer.
 928       if(!instruction.mFrameBuffer->GetGraphicsObject())
 929       {
 930         const bool created = instruction.mFrameBuffer->CreateGraphicsObjects();
 931         if(!created)
 932         {
 933           continue;
 934         }
 935       }
 936
 937       auto& clearValues = instruction.mFrameBuffer->GetGraphicsRenderPassClearValues();
 938
 939       // Set the clear color for first color attachment
 940       if(instruction.mIsClearColorSet && !clearValues.empty())
 941       {
 942         clearValues[0].color = {
 943           instruction.mClearColor.r,
 944           instruction.mClearColor.g,
 945           instruction.mClearColor.b,
 946           instruction.mClearColor.a};
 947       }
 948
 949       currentClearValues = clearValues;
 950
 951       auto loadOp = instruction.mIsClearColorSet ? Graphics::AttachmentLoadOp::CLEAR : Graphics::AttachmentLoadOp::LOAD;
 952
 953       // offscreen buffer
 954       currentRenderTarget = instruction.mFrameBuffer->GetGraphicsRenderTarget();
 955       currentRenderPass   = instruction.mFrameBuffer->GetGraphicsRenderPass(loadOp, Graphics::AttachmentStoreOp::STORE);
 956     }
 957     else // no framebuffer
 958     {
 959       // surface
 960       auto& clearValues = sceneObject->GetGraphicsRenderPassClearValues();
 961
 962       if(instruction.mIsClearColorSet)
 963       {
 964         clearValues[0].color = {
 965           instruction.mClearColor.r,
 966           instruction.mClearColor.g,
 967           instruction.mClearColor.b,
 968           instruction.mClearColor.a};
 969       }
 970
 971       currentClearValues = clearValues;
 972
 973       // @todo SceneObject should already have the depth clear / stencil clear in the clearValues array.
 974       // if the window has a depth/stencil buffer.
 975       if((depthBufferAvailable == Integration::DepthBufferAvailable::TRUE ||
 976           stencilBufferAvailable == Integration::StencilBufferAvailable::TRUE) &&
 977          (currentClearValues.size() <= 1))
 978       {
 979         currentClearValues.emplace_back();
 980         currentClearValues.back().depthStencil.depth   = 0;
 981         currentClearValues.back().depthStencil.stencil = 0;
 982       }
 983
 984       auto loadOp = instruction.mIsClearColorSet ? Graphics::AttachmentLoadOp::CLEAR : Graphics::AttachmentLoadOp::LOAD;
 985
 986       currentRenderTarget = sceneObject->GetSurfaceRenderTarget();
 987       currentRenderPass   = sceneObject->GetGraphicsRenderPass(loadOp, Graphics::AttachmentStoreOp::STORE);
 988     }
 989
 990     targetstoPresent.emplace_back(currentRenderTarget);
 991
 992     if(!instruction.mIgnoreRenderToFbo && (instruction.mFrameBuffer != nullptr))
 993     {
 994       // Offscreen buffer rendering
 995       if(instruction.mIsViewportSet)
 996       {
 997         // For Viewport the lower-left corner is (0,0)
 998         const int32_t y = (instruction.mFrameBuffer->GetHeight() - instruction.mViewport.height) - instruction.mViewport.y;
 999         viewportRect.Set(instruction.mViewport.x, y, instruction.mViewport.width, instruction.mViewport.height);
1000       }
1001       else
1002       {
1003         viewportRect.Set(0, 0, instruction.mFrameBuffer->GetWidth(), instruction.mFrameBuffer->GetHeight());
1004       }
1005       surfaceOrientation = 0;
1006     }
1007     else // No Offscreen frame buffer rendering
1008     {
1009       // Check whether a viewport is specified, otherwise the full surface size is used
1010       if(instruction.mIsViewportSet)
1011       {
1012         // For Viewport the lower-left corner is (0,0)
1013         const int32_t y = (surfaceRect.height - instruction.mViewport.height) - instruction.mViewport.y;
1014         viewportRect.Set(instruction.mViewport.x, y, instruction.mViewport.width, instruction.mViewport.height);
1015       }
1016       else
1017       {
1018         viewportRect = surfaceRect;
1019       }
1020     }
1021
1022     // Set surface orientation
1023     // @todo Inform graphics impl by another route.
1024     // was: mImpl->currentContext->SetSurfaceOrientation(surfaceOrientation);
1025
1026     /*** Clear region of framebuffer or surface before drawing ***/
1027     bool clearFullFrameRect = (surfaceRect == viewportRect);
1028     if(instruction.mFrameBuffer != nullptr)
1029     {
1030       Viewport frameRect(0, 0, instruction.mFrameBuffer->GetWidth(), instruction.mFrameBuffer->GetHeight());
1031       clearFullFrameRect = (frameRect == viewportRect);
1032     }
1033
1034     if(!clippingRect.IsEmpty())
1035     {
1036       if(!clippingRect.Intersect(viewportRect))
1037       {
1038         DALI_LOG_ERROR("Invalid clipping rect %d %d %d %d\n", clippingRect.x, clippingRect.y, clippingRect.width, clippingRect.height);
1039         clippingRect = Rect<int>();
1040       }
1041       clearFullFrameRect = false;
1042     }
1043
1044     Graphics::Rect2D scissorArea{viewportRect.x, viewportRect.y, uint32_t(viewportRect.width), uint32_t(viewportRect.height)};
1045     if(instruction.mIsClearColorSet)
1046     {
1047       if(!clearFullFrameRect)
1048       {
1049         if(!clippingRect.IsEmpty())
1050         {
1051           scissorArea = {clippingRect.x, clippingRect.y, uint32_t(clippingRect.width), uint32_t(clippingRect.height)};
1052         }
1053       }
1054     }
1055
1056     // Scissor's value should be set based on the default system coordinates.
1057     // When the surface is rotated, the input values already were set with the rotated angle.
1058     // So, re-calculation is needed.
1059     scissorArea = RecalculateScissorArea(scissorArea, surfaceOrientation, surfaceRect);
1060
1061     // Begin render pass
1062     mainCommandBuffer->BeginRenderPass(
1063       currentRenderPass,
1064       currentRenderTarget,
1065       scissorArea,
1066       currentClearValues);
1067
1068     mainCommandBuffer->SetViewport({float(viewportRect.x),
1069                                     float(viewportRect.y),
1070                                     float(viewportRect.width),
1071                                     float(viewportRect.height)});
1072
1073     mImpl->renderAlgorithms.ProcessRenderInstruction(
1074       instruction,
1075       mImpl->renderBufferIndex,
1076       depthBufferAvailable,
1077       stencilBufferAvailable,
1078       viewportRect,
1079       clippingRect,
1080       surfaceOrientation,
1081       Uint16Pair(surfaceRect.width, surfaceRect.height));
1082
1083     Graphics::SyncObject* syncObject{nullptr};
1084     // If the render instruction has an associated render tracker (owned separately)
1085     // and framebuffer, create a one shot sync object, and use it to determine when
1086     // the render pass has finished executing on GPU.
1087     if(instruction.mRenderTracker && instruction.mFrameBuffer)
1088     {
1089       syncObject                 = instruction.mRenderTracker->CreateSyncObject(mImpl->graphicsController);
1090       instruction.mRenderTracker = nullptr;
1091     }
1092     mainCommandBuffer->EndRenderPass(syncObject);
1093   }
1094
1095   // Flush UBOs
1096   mImpl->uniformBufferManager->Flush(sceneObject, renderToFbo);
1097   mImpl->renderAlgorithms.SubmitCommandBuffer();
1098   mImpl->commandBufferSubmitted = true;
1099
1100   std::sort(targetstoPresent.begin(), targetstoPresent.end());
1101
1102   Graphics::RenderTarget* rt = nullptr;
1103   for(auto& target : targetstoPresent)
1104   {
1105     if(target != rt)
1106     {
1107       mImpl->graphicsController.PresentRenderTarget(target);
1108       rt = target;
1109     }
1110   }
1111 }
1112
1113 void RenderManager::PostRender()
1114 {
1115   if(!mImpl->commandBufferSubmitted)
1116   {
1117     // Rendering is skipped but there may be pending tasks. Flush them.
1118     Graphics::SubmitInfo submitInfo;
1119     submitInfo.cmdBuffer.clear(); // Only flush
1120     submitInfo.flags = 0 | Graphics::SubmitFlagBits::FLUSH;
1121     mImpl->graphicsController.SubmitCommandBuffers(submitInfo);
1122
1123     mImpl->commandBufferSubmitted = true;
1124   }
1125
1126   // Notify RenderGeometries that rendering has finished
1127   for(auto&& iter : mImpl->geometryContainer)
1128   {
1129     iter->OnRenderFinished();
1130   }
1131
1132   // Notify updated RenderTexture that rendering has finished
1133   for(auto&& iter : mImpl->updatedTextures)
1134   {
1135     iter->OnRenderFinished();
1136   }
1137   mImpl->updatedTextures.Clear();
1138
1139   // Remove discarded textures after OnRenderFinished called
1140   mImpl->textureDiscardQueue.Clear();
1141
1142   mImpl->UpdateTrackers();
1143
1144   uint32_t count = 0u;
1145   for(auto& scene : mImpl->sceneContainer)
1146   {
1147     count += scene->GetRenderInstructions().Count(mImpl->renderBufferIndex);
1148   }
1149
1150   // Remove unused shader and programs during CACHE_CLEAN_FRAME_COUNT frames.
1151   // TODO : Cache clean logic have some problem now. Just block it until bug resolved
1152   /*
1153   if(mImpl->frameCount % CACHE_CLEAN_FRAME_COUNT == 0)
1154   {
1155     mImpl->programController.ClearUnusedCache();
1156   }
1157   */
1158
1159   const bool haveInstructions = count > 0u;
1160
1161   // If this frame was rendered due to instructions existing, we mark this so we know to clear the next frame.
1162   mImpl->lastFrameWasRendered = haveInstructions;
1163
1164   /**
1165    * The rendering has finished; swap to the next buffer.
1166    * Ideally the update has just finished using this buffer; otherwise the render thread
1167    * should block until the update has finished.
1168    */
1169   mImpl->renderBufferIndex = (0 != mImpl->renderBufferIndex) ? 0 : 1;
1170
1171   DALI_PRINT_RENDER_END();
1172 }
1173
1174 } // namespace SceneGraph
1175
1176 } // namespace Internal
1177
1178 } // namespace Dali