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