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