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

   1 /*
   2  * Copyright (c) 2021 Samsung Electronics Co., Ltd.
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the "License");
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at
   7  *
   8  * http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  *
  16  */
  17
  18 // CLASS HEADER
  19 #include <dali/internal/render/common/render-manager.h>
  20
  21 // EXTERNAL INCLUDES
  22 #include <memory.h>
  23
  24 // INTERNAL INCLUDES
  25 #include <dali/devel-api/threading/thread-pool.h>
  26 #include <dali/integration-api/core.h>
  27 #include <dali/integration-api/gl-context-helper-abstraction.h>
  28
  29 #include <dali/internal/event/common/scene-impl.h>
  30
  31 #include <dali/internal/update/common/scene-graph-scene.h>
  32 #include <dali/internal/update/render-tasks/scene-graph-camera.h>
  33
  34 #include <dali/internal/render/common/render-algorithms.h>
  35 #include <dali/internal/render/common/render-debug.h>
  36 #include <dali/internal/render/common/render-instruction.h>
  37 #include <dali/internal/render/common/render-tracker.h>
  38 #include <dali/internal/render/queue/render-queue.h>
  39 #include <dali/internal/render/renderers/render-frame-buffer.h>
  40 #include <dali/internal/render/renderers/render-texture.h>
  41 #include <dali/internal/render/renderers/shader-cache.h>
  42 #include <dali/internal/render/renderers/uniform-buffer-manager.h>
  43 #include <dali/internal/render/renderers/uniform-buffer-view-pool.h>
  44 #include <dali/internal/render/shaders/program-controller.h>
  45
  46 #include <dali/internal/render/renderers/uniform-buffer-manager.h>
  47
  48 namespace Dali
  49 {
  50 namespace Internal
  51 {
  52 namespace SceneGraph
  53 {
  54 #if defined(DEBUG_ENABLED)
  55 namespace
  56 {
  57 Debug::Filter* gLogFilter = Debug::Filter::New(Debug::NoLogging, false, "LOG_RENDER_MANAGER");
  58 } // unnamed namespace
  59 #endif
  60
  61 /**
  62  * Structure to contain internal data
  63  */
  64 struct RenderManager::Impl
  65 {
  66   Impl(Graphics::Controller&               graphicsController,
  67        Integration::DepthBufferAvailable   depthBufferAvailableParam,
  68        Integration::StencilBufferAvailable stencilBufferAvailableParam,
  69        Integration::PartialUpdateAvailable partialUpdateAvailableParam)
  70   : graphicsController(graphicsController),
  71     renderQueue(),
  72     renderAlgorithms(graphicsController),
  73     frameCount(0u),
  74     renderBufferIndex(SceneGraphBuffers::INITIAL_UPDATE_BUFFER_INDEX),
  75     rendererContainer(),
  76     samplerContainer(),
  77     textureContainer(),
  78     frameBufferContainer(),
  79     lastFrameWasRendered(false),
  80     programController(graphicsController),
  81     shaderCache(graphicsController),
  82     depthBufferAvailable(depthBufferAvailableParam),
  83     stencilBufferAvailable(stencilBufferAvailableParam),
  84     partialUpdateAvailable(partialUpdateAvailableParam)
  85   {
  86     // Create thread pool with just one thread ( there may be a need to create more threads in the future ).
  87     threadPool = std::unique_ptr<Dali::ThreadPool>(new Dali::ThreadPool());
  88     threadPool->Initialize(1u);
  89
  90     uniformBufferManager.reset(new Render::UniformBufferManager(&graphicsController));
  91   }
  92
  93   ~Impl()
  94   {
  95     threadPool.reset(nullptr); // reset now to maintain correct destruction order
  96   }
  97
  98   void AddRenderTracker(Render::RenderTracker* renderTracker)
  99   {
 100     DALI_ASSERT_DEBUG(renderTracker != nullptr);
 101     mRenderTrackers.PushBack(renderTracker);
 102   }
 103
 104   void RemoveRenderTracker(Render::RenderTracker* renderTracker)
 105   {
 106     mRenderTrackers.EraseObject(renderTracker);
 107   }
 108
 109   void UpdateTrackers()
 110   {
 111     for(auto&& iter : mRenderTrackers)
 112     {
 113       iter->PollSyncObject();
 114     }
 115   }
 116
 117   // the order is important for destruction,
 118   Graphics::Controller& graphicsController;
 119   RenderQueue           renderQueue; ///< A message queue for receiving messages from the update-thread.
 120
 121   std::vector<SceneGraph::Scene*> sceneContainer; ///< List of pointers to the scene graph objects of the scenes
 122
 123   Render::RenderAlgorithms renderAlgorithms; ///< The RenderAlgorithms object is used to action the renders required by a RenderInstruction
 124
 125   uint32_t    frameCount;        ///< The current frame count
 126   BufferIndex renderBufferIndex; ///< The index of the buffer to read from; this is opposite of the "update" buffer
 127
 128   OwnerContainer<Render::Renderer*>     rendererContainer;     ///< List of owned renderers
 129   OwnerContainer<Render::Sampler*>      samplerContainer;      ///< List of owned samplers
 130   OwnerContainer<Render::Texture*>      textureContainer;      ///< List of owned textures
 131   OwnerContainer<Render::FrameBuffer*>  frameBufferContainer;  ///< List of owned framebuffers
 132   OwnerContainer<Render::VertexBuffer*> vertexBufferContainer; ///< List of owned vertex buffers
 133   OwnerContainer<Render::Geometry*>     geometryContainer;     ///< List of owned Geometries
 134
 135   bool lastFrameWasRendered; ///< Keeps track of the last frame being rendered due to having render instructions
 136
 137   OwnerContainer<Render::RenderTracker*> mRenderTrackers; ///< List of render trackers
 138
 139   ProgramController   programController; ///< Owner of the GL programs
 140   Render::ShaderCache shaderCache;       ///< The cache for the graphics shaders
 141
 142   std::unique_ptr<Render::UniformBufferManager> uniformBufferManager; ///< The uniform buffer manager
 143
 144   Integration::DepthBufferAvailable   depthBufferAvailable;   ///< Whether the depth buffer is available
 145   Integration::StencilBufferAvailable stencilBufferAvailable; ///< Whether the stencil buffer is available
 146   Integration::PartialUpdateAvailable partialUpdateAvailable; ///< Whether the partial update is available
 147
 148   std::unique_ptr<Dali::ThreadPool> threadPool;            ///< The thread pool
 149   Vector<Graphics::Texture*>        boundTextures;         ///< The textures bound for rendering
 150   Vector<Graphics::Texture*>        textureDependencyList; ///< The dependency list of bound textures
 151 };
 152
 153 RenderManager* RenderManager::New(Graphics::Controller&               graphicsController,
 154                                   Integration::DepthBufferAvailable   depthBufferAvailable,
 155                                   Integration::StencilBufferAvailable stencilBufferAvailable,
 156                                   Integration::PartialUpdateAvailable partialUpdateAvailable)
 157 {
 158   auto* manager  = new RenderManager;
 159   manager->mImpl = new Impl(graphicsController,
 160                             depthBufferAvailable,
 161                             stencilBufferAvailable,
 162                             partialUpdateAvailable);
 163   return manager;
 164 }
 165
 166 RenderManager::RenderManager()
 167 : mImpl(nullptr)
 168 {
 169 }
 170
 171 RenderManager::~RenderManager()
 172 {
 173   delete mImpl;
 174 }
 175
 176 RenderQueue& RenderManager::GetRenderQueue()
 177 {
 178   return mImpl->renderQueue;
 179 }
 180
 181 void RenderManager::SetShaderSaver(ShaderSaver& upstream)
 182 {
 183 }
 184
 185 void RenderManager::AddRenderer(OwnerPointer<Render::Renderer>& renderer)
 186 {
 187   // Initialize the renderer as we are now in render thread
 188   renderer->Initialize(mImpl->graphicsController, mImpl->programController, mImpl->shaderCache, *(mImpl->uniformBufferManager.get()));
 189
 190   mImpl->rendererContainer.PushBack(renderer.Release());
 191 }
 192
 193 void RenderManager::RemoveRenderer(Render::Renderer* renderer)
 194 {
 195   mImpl->rendererContainer.EraseObject(renderer);
 196 }
 197
 198 void RenderManager::AddSampler(OwnerPointer<Render::Sampler>& sampler)
 199 {
 200   sampler->Initialize(mImpl->graphicsController);
 201   mImpl->samplerContainer.PushBack(sampler.Release());
 202 }
 203
 204 void RenderManager::RemoveSampler(Render::Sampler* sampler)
 205 {
 206   mImpl->samplerContainer.EraseObject(sampler);
 207 }
 208
 209 void RenderManager::AddTexture(OwnerPointer<Render::Texture>& texture)
 210 {
 211   texture->Initialize(mImpl->graphicsController);
 212   mImpl->textureContainer.PushBack(texture.Release());
 213 }
 214
 215 void RenderManager::RemoveTexture(Render::Texture* texture)
 216 {
 217   DALI_ASSERT_DEBUG(NULL != texture);
 218
 219   // Find the texture, use reference to pointer so we can do the erase safely
 220   for(auto&& iter : mImpl->textureContainer)
 221   {
 222     if(iter == texture)
 223     {
 224       texture->Destroy();
 225       mImpl->textureContainer.Erase(&iter); // Texture found; now destroy it
 226       return;
 227     }
 228   }
 229 }
 230
 231 void RenderManager::UploadTexture(Render::Texture* texture, PixelDataPtr pixelData, const Texture::UploadParams& params)
 232 {
 233   texture->Upload(pixelData, params);
 234 }
 235
 236 void RenderManager::GenerateMipmaps(Render::Texture* texture)
 237 {
 238   texture->GenerateMipmaps();
 239 }
 240
 241 void RenderManager::SetFilterMode(Render::Sampler* sampler, uint32_t minFilterMode, uint32_t magFilterMode)
 242 {
 243   sampler->SetFilterMode(static_cast<Dali::FilterMode::Type>(minFilterMode),
 244                          static_cast<Dali::FilterMode::Type>(magFilterMode));
 245 }
 246
 247 void RenderManager::SetWrapMode(Render::Sampler* sampler, uint32_t rWrapMode, uint32_t sWrapMode, uint32_t tWrapMode)
 248 {
 249   sampler->SetWrapMode(static_cast<Dali::WrapMode::Type>(rWrapMode),
 250                        static_cast<Dali::WrapMode::Type>(sWrapMode),
 251                        static_cast<Dali::WrapMode::Type>(tWrapMode));
 252 }
 253
 254 void RenderManager::AddFrameBuffer(OwnerPointer<Render::FrameBuffer>& frameBuffer)
 255 {
 256   Render::FrameBuffer* frameBufferPtr = frameBuffer.Release();
 257   mImpl->frameBufferContainer.PushBack(frameBufferPtr);
 258   frameBufferPtr->Initialize(mImpl->graphicsController);
 259 }
 260
 261 void RenderManager::RemoveFrameBuffer(Render::FrameBuffer* frameBuffer)
 262 {
 263   DALI_ASSERT_DEBUG(nullptr != frameBuffer);
 264
 265   // Find the sampler, use reference so we can safely do the erase
 266   for(auto&& iter : mImpl->frameBufferContainer)
 267   {
 268     if(iter == frameBuffer)
 269     {
 270       frameBuffer->Destroy();
 271       mImpl->frameBufferContainer.Erase(&iter); // frameBuffer found; now destroy it
 272
 273       break;
 274     }
 275   }
 276 }
 277
 278 void RenderManager::InitializeScene(SceneGraph::Scene* scene)
 279 {
 280   scene->Initialize(mImpl->graphicsController, mImpl->depthBufferAvailable, mImpl->stencilBufferAvailable);
 281   mImpl->sceneContainer.push_back(scene);
 282 }
 283
 284 void RenderManager::UninitializeScene(SceneGraph::Scene* scene)
 285 {
 286   auto iter = std::find(mImpl->sceneContainer.begin(), mImpl->sceneContainer.end(), scene);
 287   if(iter != mImpl->sceneContainer.end())
 288   {
 289     mImpl->sceneContainer.erase(iter);
 290   }
 291 }
 292
 293 void RenderManager::SurfaceReplaced(SceneGraph::Scene* scene)
 294 {
 295   scene->Initialize(mImpl->graphicsController, mImpl->depthBufferAvailable, mImpl->stencilBufferAvailable);
 296 }
 297
 298 void RenderManager::AttachColorTextureToFrameBuffer(Render::FrameBuffer* frameBuffer, Render::Texture* texture, uint32_t mipmapLevel, uint32_t layer)
 299 {
 300   frameBuffer->AttachColorTexture(texture, mipmapLevel, layer);
 301 }
 302
 303 void RenderManager::AttachDepthTextureToFrameBuffer(Render::FrameBuffer* frameBuffer, Render::Texture* texture, uint32_t mipmapLevel)
 304 {
 305   frameBuffer->AttachDepthTexture(texture, mipmapLevel);
 306 }
 307
 308 void RenderManager::AttachDepthStencilTextureToFrameBuffer(Render::FrameBuffer* frameBuffer, Render::Texture* texture, uint32_t mipmapLevel)
 309 {
 310   frameBuffer->AttachDepthStencilTexture(texture, mipmapLevel);
 311 }
 312
 313 void RenderManager::AddVertexBuffer(OwnerPointer<Render::VertexBuffer>& vertexBuffer)
 314 {
 315   mImpl->vertexBufferContainer.PushBack(vertexBuffer.Release());
 316 }
 317
 318 void RenderManager::RemoveVertexBuffer(Render::VertexBuffer* vertexBuffer)
 319 {
 320   mImpl->vertexBufferContainer.EraseObject(vertexBuffer);
 321 }
 322
 323 void RenderManager::SetVertexBufferFormat(Render::VertexBuffer* vertexBuffer, OwnerPointer<Render::VertexBuffer::Format>& format)
 324 {
 325   vertexBuffer->SetFormat(format.Release());
 326 }
 327
 328 void RenderManager::SetVertexBufferData(Render::VertexBuffer* vertexBuffer, OwnerPointer<Vector<uint8_t>>& data, uint32_t size)
 329 {
 330   vertexBuffer->SetData(data.Release(), size);
 331 }
 332
 333 void RenderManager::SetIndexBuffer(Render::Geometry* geometry, Dali::Vector<uint16_t>& indices)
 334 {
 335   geometry->SetIndexBuffer(indices);
 336 }
 337
 338 void RenderManager::AddGeometry(OwnerPointer<Render::Geometry>& geometry)
 339 {
 340   mImpl->geometryContainer.PushBack(geometry.Release());
 341 }
 342
 343 void RenderManager::RemoveGeometry(Render::Geometry* geometry)
 344 {
 345   mImpl->geometryContainer.EraseObject(geometry);
 346 }
 347
 348 void RenderManager::AttachVertexBuffer(Render::Geometry* geometry, Render::VertexBuffer* vertexBuffer)
 349 {
 350   DALI_ASSERT_DEBUG(nullptr != geometry);
 351
 352   // Find the geometry
 353   for(auto&& iter : mImpl->geometryContainer)
 354   {
 355     if(iter == geometry)
 356     {
 357       iter->AddVertexBuffer(vertexBuffer);
 358       break;
 359     }
 360   }
 361 }
 362
 363 void RenderManager::RemoveVertexBuffer(Render::Geometry* geometry, Render::VertexBuffer* vertexBuffer)
 364 {
 365   DALI_ASSERT_DEBUG(nullptr != geometry);
 366
 367   // Find the geometry
 368   for(auto&& iter : mImpl->geometryContainer)
 369   {
 370     if(iter == geometry)
 371     {
 372       iter->RemoveVertexBuffer(vertexBuffer);
 373       break;
 374     }
 375   }
 376 }
 377
 378 void RenderManager::SetGeometryType(Render::Geometry* geometry, uint32_t geometryType)
 379 {
 380   geometry->SetType(Render::Geometry::Type(geometryType));
 381 }
 382
 383 void RenderManager::AddRenderTracker(Render::RenderTracker* renderTracker)
 384 {
 385   mImpl->AddRenderTracker(renderTracker);
 386 }
 387
 388 void RenderManager::RemoveRenderTracker(Render::RenderTracker* renderTracker)
 389 {
 390   mImpl->RemoveRenderTracker(renderTracker);
 391 }
 392
 393 void RenderManager::PreRender(Integration::RenderStatus& status, bool forceClear, bool uploadOnly)
 394 {
 395   DALI_PRINT_RENDER_START(mImpl->renderBufferIndex);
 396
 397   // Rollback
 398   mImpl->uniformBufferManager->GetUniformBufferViewPool(mImpl->renderBufferIndex)->Rollback();
 399
 400   // Increment the frame count at the beginning of each frame
 401   ++mImpl->frameCount;
 402
 403   // Process messages queued during previous update
 404   mImpl->renderQueue.ProcessMessages(mImpl->renderBufferIndex);
 405
 406   uint32_t count = 0u;
 407   for(auto& i : mImpl->sceneContainer)
 408   {
 409     count += i->GetRenderInstructions().Count(mImpl->renderBufferIndex);
 410   }
 411
 412   const bool haveInstructions = count > 0u;
 413
 414   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");
 415
 416   // Only render if we have instructions to render, or the last frame was rendered (and therefore a clear is required).
 417   if(haveInstructions || mImpl->lastFrameWasRendered || forceClear)
 418   {
 419     DALI_LOG_INFO(gLogFilter, Debug::General, "Render: Processing\n");
 420
 421     // Upload the geometries
 422     for(auto& i : mImpl->sceneContainer)
 423     {
 424       RenderInstructionContainer& instructions = i->GetRenderInstructions();
 425       for(uint32_t j = 0; j < instructions.Count(mImpl->renderBufferIndex); ++j)
 426       {
 427         RenderInstruction& instruction = instructions.At(mImpl->renderBufferIndex, j);
 428
 429         const Matrix* viewMatrix       = instruction.GetViewMatrix(mImpl->renderBufferIndex);
 430         const Matrix* projectionMatrix = instruction.GetProjectionMatrix(mImpl->renderBufferIndex);
 431
 432         DALI_ASSERT_DEBUG(viewMatrix);
 433         DALI_ASSERT_DEBUG(projectionMatrix);
 434
 435         if(viewMatrix && projectionMatrix)
 436         {
 437           const RenderListContainer::SizeType renderListCount = instruction.RenderListCount();
 438
 439           // Iterate through each render list.
 440           for(RenderListContainer::SizeType index = 0; index < renderListCount; ++index)
 441           {
 442             const RenderList* renderList = instruction.GetRenderList(index);
 443
 444             if(renderList && !renderList->IsEmpty())
 445             {
 446               const std::size_t itemCount = renderList->Count();
 447               for(uint32_t itemIndex = 0u; itemIndex < itemCount; ++itemIndex)
 448               {
 449                 const RenderItem& item = renderList->GetItem(itemIndex);
 450                 if(DALI_LIKELY(item.mRenderer))
 451                 {
 452                   item.mRenderer->Upload();
 453                 }
 454               }
 455             }
 456           }
 457         }
 458       }
 459     }
 460   }
 461 }
 462
 463 void RenderManager::PreRender(Integration::Scene& scene, std::vector<Rect<int>>& damagedRects)
 464 {
 465   if(mImpl->partialUpdateAvailable != Integration::PartialUpdateAvailable::TRUE)
 466   {
 467     return;
 468   }
 469
 470   Internal::Scene&   sceneInternal = GetImplementation(scene);
 471   SceneGraph::Scene* sceneObject   = sceneInternal.GetSceneObject();
 472
 473   if(sceneObject->IsRenderingSkipped())
 474   {
 475     // We don't need to calculate dirty rects
 476     return;
 477   }
 478
 479   class DamagedRectsCleaner
 480   {
 481   public:
 482     explicit DamagedRectsCleaner(std::vector<Rect<int>>& damagedRects)
 483     : mDamagedRects(damagedRects),
 484       mCleanOnReturn(true)
 485     {
 486     }
 487
 488     void SetCleanOnReturn(bool cleanOnReturn)
 489     {
 490       mCleanOnReturn = cleanOnReturn;
 491     }
 492
 493     ~DamagedRectsCleaner()
 494     {
 495       if(mCleanOnReturn)
 496       {
 497         mDamagedRects.clear();
 498       }
 499     }
 500
 501   private:
 502     std::vector<Rect<int>>& mDamagedRects;
 503     bool                    mCleanOnReturn;
 504   };
 505
 506   Rect<int32_t> surfaceRect = sceneObject->GetSurfaceRect();
 507
 508   // Clean collected dirty/damaged rects on exit if 3d layer or 3d node or other conditions.
 509   DamagedRectsCleaner damagedRectCleaner(damagedRects);
 510
 511   // Mark previous dirty rects in the sorted array. The array is already sorted by node and renderer, frame number.
 512   // so you don't need to sort: std::stable_sort(itemsDirtyRects.begin(), itemsDirtyRects.end());
 513   std::vector<DirtyRect>& itemsDirtyRects = sceneInternal.GetItemsDirtyRects();
 514   for(DirtyRect& dirtyRect : itemsDirtyRects)
 515   {
 516     dirtyRect.visited = false;
 517   }
 518
 519   uint32_t instructionCount = sceneObject->GetRenderInstructions().Count(mImpl->renderBufferIndex);
 520   for(uint32_t i = 0; i < instructionCount; ++i)
 521   {
 522     RenderInstruction& instruction = sceneObject->GetRenderInstructions().At(mImpl->renderBufferIndex, i);
 523
 524     if(instruction.mFrameBuffer)
 525     {
 526       return; // TODO: reset, we don't deal with render tasks with framebuffers (for now)
 527     }
 528
 529     const Camera* camera = instruction.GetCamera();
 530     if(camera->mType == Camera::DEFAULT_TYPE && camera->mTargetPosition == Camera::DEFAULT_TARGET_POSITION)
 531     {
 532       const Node* node = instruction.GetCamera()->GetNode();
 533       if(node)
 534       {
 535         Vector3    position;
 536         Vector3    scale;
 537         Quaternion orientation;
 538         node->GetWorldMatrix(mImpl->renderBufferIndex).GetTransformComponents(position, orientation, scale);
 539
 540         Vector3 orientationAxis;
 541         Radian  orientationAngle;
 542         orientation.ToAxisAngle(orientationAxis, orientationAngle);
 543
 544         if(position.x > Math::MACHINE_EPSILON_10000 ||
 545            position.y > Math::MACHINE_EPSILON_10000 ||
 546            orientationAxis != Vector3(0.0f, 1.0f, 0.0f) ||
 547            orientationAngle != ANGLE_180 ||
 548            scale != Vector3(1.0f, 1.0f, 1.0f))
 549         {
 550           return;
 551         }
 552       }
 553     }
 554     else
 555     {
 556       return;
 557     }
 558
 559     Rect<int32_t> viewportRect;
 560     if(instruction.mIsViewportSet)
 561     {
 562       const int32_t y = (surfaceRect.height - instruction.mViewport.height) - instruction.mViewport.y;
 563       viewportRect.Set(instruction.mViewport.x, y, instruction.mViewport.width, instruction.mViewport.height);
 564       if(viewportRect.IsEmpty() || !viewportRect.IsValid())
 565       {
 566         return; // just skip funny use cases for now, empty viewport means it is set somewhere else
 567       }
 568     }
 569     else
 570     {
 571       viewportRect = surfaceRect;
 572     }
 573
 574     const Matrix* viewMatrix       = instruction.GetViewMatrix(mImpl->renderBufferIndex);
 575     const Matrix* projectionMatrix = instruction.GetProjectionMatrix(mImpl->renderBufferIndex);
 576     if(viewMatrix && projectionMatrix)
 577     {
 578       const RenderListContainer::SizeType count = instruction.RenderListCount();
 579       for(RenderListContainer::SizeType index = 0u; index < count; ++index)
 580       {
 581         const RenderList* renderList = instruction.GetRenderList(index);
 582         if(renderList && !renderList->IsEmpty())
 583         {
 584           const std::size_t listCount = renderList->Count();
 585           for(uint32_t listIndex = 0u; listIndex < listCount; ++listIndex)
 586           {
 587             RenderItem& item = renderList->GetItem(listIndex);
 588             // If the item does 3D transformation, do early exit and clean the damaged rect array
 589             if(item.mUpdateSize == Vector3::ZERO)
 590             {
 591               return;
 592             }
 593
 594             Rect<int> rect;
 595             DirtyRect dirtyRect(item.mNode, item.mRenderer, mImpl->frameCount, rect);
 596             // If the item refers to updated node or renderer.
 597             if(item.mIsUpdated ||
 598                (item.mNode &&
 599                 (item.mNode->Updated() || (item.mRenderer && item.mRenderer->Updated(mImpl->renderBufferIndex, item.mNode)))))
 600             {
 601               item.mIsUpdated = false;
 602               item.mNode->SetUpdated(false);
 603
 604               rect = item.CalculateViewportSpaceAABB(item.mUpdateSize, viewportRect.width, viewportRect.height);
 605               if(rect.IsValid() && rect.Intersect(viewportRect) && !rect.IsEmpty())
 606               {
 607                 const int left   = rect.x;
 608                 const int top    = rect.y;
 609                 const int right  = rect.x + rect.width;
 610                 const int bottom = rect.y + rect.height;
 611                 rect.x           = (left / 16) * 16;
 612                 rect.y           = (top / 16) * 16;
 613                 rect.width       = ((right + 16) / 16) * 16 - rect.x;
 614                 rect.height      = ((bottom + 16) / 16) * 16 - rect.y;
 615
 616                 // Found valid dirty rect.
 617                 // 1. Insert it in the sorted array of the dirty rects.
 618                 // 2. Mark the related dirty rects as visited so they will not be removed below.
 619                 // 3. Keep only last 3 dirty rects for the same node and renderer (Tizen uses 3 back buffers, Ubuntu 1).
 620                 dirtyRect.rect    = rect;
 621                 auto dirtyRectPos = std::lower_bound(itemsDirtyRects.begin(), itemsDirtyRects.end(), dirtyRect);
 622                 dirtyRectPos      = itemsDirtyRects.insert(dirtyRectPos, dirtyRect);
 623
 624                 int c = 1;
 625                 while(++dirtyRectPos != itemsDirtyRects.end())
 626                 {
 627                   if(dirtyRectPos->node != item.mNode || dirtyRectPos->renderer != item.mRenderer)
 628                   {
 629                     break;
 630                   }
 631
 632                   dirtyRectPos->visited = true;
 633                   Rect<int>& dirtRect   = dirtyRectPos->rect;
 634                   rect.Merge(dirtRect);
 635
 636                   c++;
 637                   if(c > 3) // no more then 3 previous rects
 638                   {
 639                     itemsDirtyRects.erase(dirtyRectPos);
 640                     break;
 641                   }
 642                 }
 643
 644                 damagedRects.push_back(rect);
 645               }
 646             }
 647             else
 648             {
 649               // 1. The item is not dirty, the node and renderer referenced by the item are still exist.
 650               // 2. Mark the related dirty rects as visited so they will not be removed below.
 651               auto dirtyRectPos = std::lower_bound(itemsDirtyRects.begin(), itemsDirtyRects.end(), dirtyRect);
 652               while(dirtyRectPos != itemsDirtyRects.end())
 653               {
 654                 if(dirtyRectPos->node != item.mNode || dirtyRectPos->renderer != item.mRenderer)
 655                 {
 656                   break;
 657                 }
 658
 659                 dirtyRectPos->visited = true;
 660                 dirtyRectPos++;
 661               }
 662             }
 663           }
 664         }
 665       }
 666     }
 667   }
 668
 669   // Check removed nodes or removed renderers dirty rects
 670   auto i = itemsDirtyRects.begin();
 671   auto j = itemsDirtyRects.begin();
 672   while(i != itemsDirtyRects.end())
 673   {
 674     if(i->visited)
 675     {
 676       *j++ = *i;
 677     }
 678     else
 679     {
 680       Rect<int>& dirtRect = i->rect;
 681       damagedRects.push_back(dirtRect);
 682     }
 683     i++;
 684   }
 685
 686   itemsDirtyRects.resize(j - itemsDirtyRects.begin());
 687   damagedRectCleaner.SetCleanOnReturn(false);
 688 }
 689
 690 void RenderManager::RenderScene(Integration::RenderStatus& status, Integration::Scene& scene, bool renderToFbo)
 691 {
 692   Rect<int> clippingRect;
 693   RenderScene(status, scene, renderToFbo, clippingRect);
 694 }
 695
 696 void RenderManager::RenderScene(Integration::RenderStatus& status, Integration::Scene& scene, bool renderToFbo, Rect<int>& clippingRect)
 697 {
 698   // Reset main algorithms command buffer
 699   mImpl->renderAlgorithms.ResetCommandBuffer();
 700
 701   auto mainCommandBuffer = mImpl->renderAlgorithms.GetMainCommandBuffer();
 702
 703   Internal::Scene&   sceneInternal = GetImplementation(scene);
 704   SceneGraph::Scene* sceneObject   = sceneInternal.GetSceneObject();
 705
 706   uint32_t count = sceneObject->GetRenderInstructions().Count(mImpl->renderBufferIndex);
 707
 708   std::vector<Graphics::RenderTarget*> targetstoPresent;
 709
 710   for(uint32_t i = 0; i < count; ++i)
 711   {
 712     RenderInstruction& instruction = sceneObject->GetRenderInstructions().At(mImpl->renderBufferIndex, i);
 713
 714     if((renderToFbo && !instruction.mFrameBuffer) || (!renderToFbo && instruction.mFrameBuffer))
 715     {
 716       continue; // skip
 717     }
 718
 719     // Mark that we will require a post-render step to be performed (includes swap-buffers).
 720     status.SetNeedsPostRender(true);
 721
 722     Rect<int32_t> viewportRect;
 723
 724     Rect<int32_t> surfaceRect        = sceneObject->GetSurfaceRect();
 725     int32_t       surfaceOrientation = sceneObject->GetSurfaceOrientation();
 726
 727     // @todo Should these be part of scene?
 728     Integration::DepthBufferAvailable   depthBufferAvailable   = mImpl->depthBufferAvailable;
 729     Integration::StencilBufferAvailable stencilBufferAvailable = mImpl->stencilBufferAvailable;
 730
 731     Graphics::RenderTarget*           currentRenderTarget = nullptr;
 732     Graphics::RenderPass*             currentRenderPass   = nullptr;
 733     std::vector<Graphics::ClearValue> currentClearValues{};
 734
 735     if(instruction.mFrameBuffer)
 736     {
 737       // Ensure graphics framebuffer is created, bind attachments and create render passes
 738       // Only happens once per framebuffer. If the create fails, e.g. no attachments yet,
 739       // then don't render to this framebuffer.
 740       if(!instruction.mFrameBuffer->GetGraphicsObject())
 741       {
 742         const bool created = instruction.mFrameBuffer->CreateGraphicsObjects();
 743         if(!created)
 744         {
 745           continue;
 746         }
 747       }
 748
 749       auto& clearValues = instruction.mFrameBuffer->GetGraphicsRenderPassClearValues();
 750
 751       // Set the clear color for first color attachment
 752       if(instruction.mIsClearColorSet && !clearValues.empty())
 753       {
 754         clearValues[0].color = {
 755           instruction.mClearColor.r,
 756           instruction.mClearColor.g,
 757           instruction.mClearColor.b,
 758           instruction.mClearColor.a};
 759       }
 760
 761       currentClearValues = clearValues;
 762
 763       auto loadOp = instruction.mIsClearColorSet ? Graphics::AttachmentLoadOp::CLEAR : Graphics::AttachmentLoadOp::LOAD;
 764
 765       // offscreen buffer
 766       currentRenderTarget = instruction.mFrameBuffer->GetGraphicsRenderTarget();
 767       currentRenderPass   = instruction.mFrameBuffer->GetGraphicsRenderPass(loadOp, Graphics::AttachmentStoreOp::STORE);
 768     }
 769     else // no framebuffer
 770     {
 771       // surface
 772       auto& clearValues = sceneObject->GetGraphicsRenderPassClearValues();
 773
 774       if(instruction.mIsClearColorSet)
 775       {
 776         clearValues[0].color = {
 777           instruction.mClearColor.r,
 778           instruction.mClearColor.g,
 779           instruction.mClearColor.b,
 780           instruction.mClearColor.a};
 781       }
 782
 783       currentClearValues = clearValues;
 784
 785       // @todo SceneObject should already have the depth clear / stencil clear in the clearValues array.
 786       // if the window has a depth/stencil buffer.
 787       if((depthBufferAvailable == Integration::DepthBufferAvailable::TRUE ||
 788           stencilBufferAvailable == Integration::StencilBufferAvailable::TRUE) &&
 789          (currentClearValues.size() <= 1))
 790       {
 791         currentClearValues.emplace_back();
 792         currentClearValues.back().depthStencil.depth   = 0;
 793         currentClearValues.back().depthStencil.stencil = 0;
 794       }
 795
 796       auto loadOp = instruction.mIsClearColorSet ? Graphics::AttachmentLoadOp::CLEAR : Graphics::AttachmentLoadOp::LOAD;
 797
 798       currentRenderTarget = sceneObject->GetSurfaceRenderTarget();
 799       currentRenderPass   = sceneObject->GetGraphicsRenderPass(loadOp, Graphics::AttachmentStoreOp::STORE);
 800     }
 801
 802     targetstoPresent.emplace_back(currentRenderTarget);
 803
 804     // reset the program matrices for all programs once per frame
 805     // this ensures we will set view and projection matrix once per program per camera
 806     mImpl->programController.ResetProgramMatrices();
 807
 808     if(instruction.mFrameBuffer)
 809     {
 810       // For each offscreen buffer, update the dependency list with the new texture id used by this frame buffer.
 811       for(unsigned int i0 = 0, i1 = instruction.mFrameBuffer->GetColorAttachmentCount(); i0 < i1; ++i0)
 812       {
 813         mImpl->textureDependencyList.PushBack(instruction.mFrameBuffer->GetTexture(i0));
 814       }
 815     }
 816
 817     if(!instruction.mIgnoreRenderToFbo && (instruction.mFrameBuffer != nullptr))
 818     {
 819       // Offscreen buffer rendering
 820       if(instruction.mIsViewportSet)
 821       {
 822         // For glViewport the lower-left corner is (0,0)
 823         const int32_t y = (instruction.mFrameBuffer->GetHeight() - instruction.mViewport.height) - instruction.mViewport.y;
 824         viewportRect.Set(instruction.mViewport.x, y, instruction.mViewport.width, instruction.mViewport.height);
 825       }
 826       else
 827       {
 828         viewportRect.Set(0, 0, instruction.mFrameBuffer->GetWidth(), instruction.mFrameBuffer->GetHeight());
 829       }
 830       surfaceOrientation = 0;
 831     }
 832     else // No Offscreen frame buffer rendering
 833     {
 834       // Check whether a viewport is specified, otherwise the full surface size is used
 835       if(instruction.mIsViewportSet)
 836       {
 837         // For glViewport the lower-left corner is (0,0)
 838         const int32_t y = (surfaceRect.height - instruction.mViewport.height) - instruction.mViewport.y;
 839         viewportRect.Set(instruction.mViewport.x, y, instruction.mViewport.width, instruction.mViewport.height);
 840       }
 841       else
 842       {
 843         viewportRect = surfaceRect;
 844       }
 845     }
 846
 847     // Set surface orientation
 848     // @todo Inform graphics impl by another route.
 849     // was: mImpl->currentContext->SetSurfaceOrientation(surfaceOrientation);
 850
 851     /*** Clear region of framebuffer or surface before drawing ***/
 852     bool clearFullFrameRect = (surfaceRect == viewportRect);
 853     if(instruction.mFrameBuffer != nullptr)
 854     {
 855       Viewport frameRect(0, 0, instruction.mFrameBuffer->GetWidth(), instruction.mFrameBuffer->GetHeight());
 856       clearFullFrameRect = (frameRect == viewportRect);
 857     }
 858
 859     if(!clippingRect.IsEmpty())
 860     {
 861       if(!clippingRect.Intersect(viewportRect))
 862       {
 863         DALI_LOG_ERROR("Invalid clipping rect %d %d %d %d\n", clippingRect.x, clippingRect.y, clippingRect.width, clippingRect.height);
 864         clippingRect = Rect<int>();
 865       }
 866       clearFullFrameRect = false;
 867     }
 868
 869     Graphics::Rect2D scissorArea{viewportRect.x, viewportRect.y, uint32_t(viewportRect.width), uint32_t(viewportRect.height)};
 870     if(instruction.mIsClearColorSet)
 871     {
 872       if(!clearFullFrameRect)
 873       {
 874         if(!clippingRect.IsEmpty())
 875         {
 876           scissorArea = {clippingRect.x, clippingRect.y, uint32_t(clippingRect.width), uint32_t(clippingRect.height)};
 877         }
 878       }
 879     }
 880
 881     // Begin render pass
 882     mainCommandBuffer->BeginRenderPass(
 883       currentRenderPass,
 884       currentRenderTarget,
 885       scissorArea,
 886       currentClearValues);
 887
 888     mainCommandBuffer->SetViewport({float(viewportRect.x),
 889                                     float(viewportRect.y),
 890                                     float(viewportRect.width),
 891                                     float(viewportRect.height)});
 892
 893     // Clear the list of bound textures
 894     mImpl->boundTextures.Clear();
 895
 896     mImpl->renderAlgorithms.ProcessRenderInstruction(
 897       instruction,
 898       mImpl->renderBufferIndex,
 899       depthBufferAvailable,
 900       stencilBufferAvailable,
 901       mImpl->boundTextures,
 902       viewportRect,
 903       clippingRect,
 904       surfaceOrientation);
 905
 906     // Synchronise the FBO/Texture access
 907
 908     // Check whether any bound texture is in the dependency list
 909     bool textureFound = false;
 910
 911     if(mImpl->boundTextures.Count() > 0u && mImpl->textureDependencyList.Count() > 0u)
 912     {
 913       for(auto texture : mImpl->textureDependencyList)
 914       {
 915         textureFound = std::find_if(mImpl->boundTextures.Begin(), mImpl->boundTextures.End(), [texture](Graphics::Texture* graphicsTexture) {
 916                          return texture == graphicsTexture;
 917                        }) != mImpl->boundTextures.End();
 918       }
 919     }
 920
 921     if(textureFound)
 922     {
 923       if(instruction.mFrameBuffer)
 924       {
 925         // For off-screen buffer
 926
 927         // Clear the dependency list
 928         mImpl->textureDependencyList.Clear();
 929       }
 930       else
 931       {
 932         // Worker thread lambda function
 933         auto& glContextHelperAbstraction = mImpl->graphicsController.GetGlContextHelperAbstraction();
 934         auto  workerFunction             = [&glContextHelperAbstraction](int workerThread) {
 935           // Switch to the shared context in the worker thread
 936           glContextHelperAbstraction.MakeSurfacelessContextCurrent();
 937
 938           // Wait until all rendering calls for the shared context are executed
 939           glContextHelperAbstraction.WaitClient();
 940
 941           // Must clear the context in the worker thread
 942           // Otherwise the shared context cannot be switched to from the render thread
 943           glContextHelperAbstraction.MakeContextNull();
 944         };
 945
 946         auto future = mImpl->threadPool->SubmitTask(0u, workerFunction);
 947         if(future)
 948         {
 949           mImpl->threadPool->Wait();
 950
 951           // Clear the dependency list
 952           mImpl->textureDependencyList.Clear();
 953         }
 954       }
 955     }
 956
 957     Graphics::SyncObject* syncObject{nullptr};
 958     // If the render instruction has an associated render tracker (owned separately)
 959     // and framebuffer, create a one shot sync object, and use it to determine when
 960     // the render pass has finished executing on GPU.
 961     if(instruction.mRenderTracker && instruction.mFrameBuffer)
 962     {
 963       syncObject                 = instruction.mRenderTracker->CreateSyncObject(mImpl->graphicsController);
 964       instruction.mRenderTracker = nullptr;
 965     }
 966     mainCommandBuffer->EndRenderPass(syncObject);
 967   }
 968   mImpl->renderAlgorithms.SubmitCommandBuffer();
 969
 970   std::sort(targetstoPresent.begin(), targetstoPresent.end());
 971
 972   Graphics::RenderTarget* rt = nullptr;
 973   for(auto& target : targetstoPresent)
 974   {
 975     if(target != rt)
 976     {
 977       mImpl->graphicsController.PresentRenderTarget(target);
 978       rt = target;
 979     }
 980   }
 981 }
 982
 983 void RenderManager::PostRender(bool uploadOnly)
 984 {
 985   // Notify RenderGeometries that rendering has finished
 986   for(auto&& iter : mImpl->geometryContainer)
 987   {
 988     iter->OnRenderFinished();
 989   }
 990
 991   mImpl->UpdateTrackers();
 992
 993   uint32_t count = 0u;
 994   for(auto& scene : mImpl->sceneContainer)
 995   {
 996     count += scene->GetRenderInstructions().Count(mImpl->renderBufferIndex);
 997   }
 998
 999   const bool haveInstructions = count > 0u;
1000
1001   // If this frame was rendered due to instructions existing, we mark this so we know to clear the next frame.
1002   mImpl->lastFrameWasRendered = haveInstructions;
1003
1004   /**
1005    * The rendering has finished; swap to the next buffer.
1006    * Ideally the update has just finished using this buffer; otherwise the render thread
1007    * should block until the update has finished.
1008    */
1009   mImpl->renderBufferIndex = (0 != mImpl->renderBufferIndex) ? 0 : 1;
1010
1011   DALI_PRINT_RENDER_END();
1012 }
1013
1014 } // namespace SceneGraph
1015
1016 } // namespace Internal
1017
1018 } // namespace Dali