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/shaders/program-controller.h>
  44
  45 namespace Dali
  46 {
  47 namespace Internal
  48 {
  49 namespace SceneGraph
  50 {
  51 #if defined(DEBUG_ENABLED)
  52 namespace
  53 {
  54 Debug::Filter* gLogFilter = Debug::Filter::New(Debug::NoLogging, false, "LOG_RENDER_MANAGER");
  55 } // unnamed namespace
  56 #endif
  57
  58 /**
  59  * Structure to contain internal data
  60  */
  61 struct RenderManager::Impl
  62 {
  63   Impl(Graphics::Controller&               graphicsController,
  64        Integration::DepthBufferAvailable   depthBufferAvailableParam,
  65        Integration::StencilBufferAvailable stencilBufferAvailableParam,
  66        Integration::PartialUpdateAvailable partialUpdateAvailableParam)
  67   : context(graphicsController.GetGlAbstraction(), &sceneContextContainer),
  68     currentContext(&context),
  69     graphicsController(graphicsController),
  70     renderQueue(),
  71     renderAlgorithms(graphicsController),
  72     frameCount(0u),
  73     renderBufferIndex(SceneGraphBuffers::INITIAL_UPDATE_BUFFER_INDEX),
  74     rendererContainer(),
  75     samplerContainer(),
  76     textureContainer(),
  77     frameBufferContainer(),
  78     lastFrameWasRendered(false),
  79     programController(graphicsController),
  80     shaderCache(graphicsController),
  81     depthBufferAvailable(depthBufferAvailableParam),
  82     stencilBufferAvailable(stencilBufferAvailableParam),
  83     partialUpdateAvailable(partialUpdateAvailableParam)
  84   {
  85     // Create thread pool with just one thread ( there may be a need to create more threads in the future ).
  86     threadPool = std::unique_ptr<Dali::ThreadPool>(new Dali::ThreadPool());
  87     threadPool->Initialize(1u);
  88
  89     uniformBufferManager.reset(new Render::UniformBufferManager(&graphicsController));
  90   }
  91
  92   ~Impl()
  93   {
  94     threadPool.reset(nullptr); // reset now to maintain correct destruction order
  95   }
  96
  97   void AddRenderTracker(Render::RenderTracker* renderTracker)
  98   {
  99     DALI_ASSERT_DEBUG(renderTracker != NULL);
 100     mRenderTrackers.PushBack(renderTracker);
 101   }
 102
 103   void RemoveRenderTracker(Render::RenderTracker* renderTracker)
 104   {
 105     mRenderTrackers.EraseObject(renderTracker);
 106   }
 107
 108   Context* CreateSceneContext()
 109   {
 110     Context* context = new Context(graphicsController.GetGlAbstraction());
 111     sceneContextContainer.PushBack(context);
 112     return context;
 113   }
 114
 115   void DestroySceneContext(Context* sceneContext)
 116   {
 117     auto iter = std::find(sceneContextContainer.Begin(), sceneContextContainer.End(), sceneContext);
 118     if(iter != sceneContextContainer.End())
 119     {
 120       (*iter)->GlContextDestroyed();
 121       sceneContextContainer.Erase(iter);
 122     }
 123   }
 124
 125   Context* ReplaceSceneContext(Context* oldSceneContext)
 126   {
 127     Context* newContext = new Context(graphicsController.GetGlAbstraction());
 128
 129     oldSceneContext->GlContextDestroyed();
 130
 131     std::replace(sceneContextContainer.begin(), sceneContextContainer.end(), oldSceneContext, newContext);
 132     return newContext;
 133   }
 134
 135   void UpdateTrackers()
 136   {
 137     for(auto&& iter : mRenderTrackers)
 138     {
 139       iter->PollSyncObject();
 140     }
 141   }
 142
 143   // the order is important for destruction,
 144   // programs are owned by context at the moment.
 145   Context                  context;               ///< Holds the GL state of the share resource context
 146   Context*                 currentContext;        ///< Holds the GL state of the current context for rendering
 147   OwnerContainer<Context*> sceneContextContainer; ///< List of owned contexts holding the GL state per scene
 148   Graphics::Controller&    graphicsController;
 149   RenderQueue              renderQueue; ///< A message queue for receiving messages from the update-thread.
 150
 151   std::vector<SceneGraph::Scene*> sceneContainer; ///< List of pointers to the scene graph objects of the scenes
 152
 153   Render::RenderAlgorithms renderAlgorithms; ///< The RenderAlgorithms object is used to action the renders required by a RenderInstruction
 154
 155   uint32_t    frameCount;        ///< The current frame count
 156   BufferIndex renderBufferIndex; ///< The index of the buffer to read from; this is opposite of the "update" buffer
 157
 158   OwnerContainer<Render::Renderer*>     rendererContainer;     ///< List of owned renderers
 159   OwnerContainer<Render::Sampler*>      samplerContainer;      ///< List of owned samplers
 160   OwnerContainer<Render::Texture*>      textureContainer;      ///< List of owned textures
 161   OwnerContainer<Render::FrameBuffer*>  frameBufferContainer;  ///< List of owned framebuffers
 162   OwnerContainer<Render::VertexBuffer*> vertexBufferContainer; ///< List of owned vertex buffers
 163   OwnerContainer<Render::Geometry*>     geometryContainer;     ///< List of owned Geometries
 164
 165   bool lastFrameWasRendered; ///< Keeps track of the last frame being rendered due to having render instructions
 166
 167   OwnerContainer<Render::RenderTracker*> mRenderTrackers; ///< List of render trackers
 168
 169   ProgramController   programController; ///< Owner of the GL programs
 170   Render::ShaderCache shaderCache;       ///< The cache for the graphics shaders
 171
 172   std::unique_ptr<Render::UniformBufferManager> uniformBufferManager; ///< The uniform buffer manager
 173
 174   Integration::DepthBufferAvailable   depthBufferAvailable;   ///< Whether the depth buffer is available
 175   Integration::StencilBufferAvailable stencilBufferAvailable; ///< Whether the stencil buffer is available
 176   Integration::PartialUpdateAvailable partialUpdateAvailable; ///< Whether the partial update is available
 177
 178   std::unique_ptr<Dali::ThreadPool> threadPool;            ///< The thread pool
 179   Vector<Graphics::Texture*>        boundTextures;         ///< The textures bound for rendering
 180   Vector<Graphics::Texture*>        textureDependencyList; ///< The dependency list of bound textures
 181 };
 182
 183 RenderManager* RenderManager::New(Graphics::Controller&               graphicsController,
 184                                   Integration::DepthBufferAvailable   depthBufferAvailable,
 185                                   Integration::StencilBufferAvailable stencilBufferAvailable,
 186                                   Integration::PartialUpdateAvailable partialUpdateAvailable)
 187 {
 188   RenderManager* manager = new RenderManager;
 189   manager->mImpl         = new Impl(graphicsController,
 190                             depthBufferAvailable,
 191                             stencilBufferAvailable,
 192                             partialUpdateAvailable);
 193   return manager;
 194 }
 195
 196 RenderManager::RenderManager()
 197 : mImpl(nullptr)
 198 {
 199 }
 200
 201 RenderManager::~RenderManager()
 202 {
 203   delete mImpl;
 204 }
 205
 206 RenderQueue& RenderManager::GetRenderQueue()
 207 {
 208   return mImpl->renderQueue;
 209 }
 210
 211 void RenderManager::ContextCreated()
 212 {
 213   mImpl->context.GlContextCreated();
 214   mImpl->programController.GlContextCreated();
 215
 216   // renderers, textures and gpu buffers cannot reinitialize themselves
 217   // so they rely on someone reloading the data for them
 218 }
 219
 220 void RenderManager::ContextDestroyed()
 221 {
 222   mImpl->context.GlContextDestroyed();
 223   mImpl->programController.GlContextDestroyed();
 224
 225   //Inform textures
 226   for(auto&& texture : mImpl->textureContainer)
 227   {
 228     texture->Destroy();
 229   }
 230
 231   //Inform framebuffers
 232   for(auto&& framebuffer : mImpl->frameBufferContainer)
 233   {
 234     framebuffer->Destroy();
 235   }
 236
 237   // inform context
 238   for(auto&& context : mImpl->sceneContextContainer)
 239   {
 240     context->GlContextDestroyed();
 241   }
 242 }
 243
 244 void RenderManager::SetShaderSaver(ShaderSaver& upstream)
 245 {
 246   mImpl->programController.SetShaderSaver(upstream);
 247 }
 248
 249 void RenderManager::AddRenderer(OwnerPointer<Render::Renderer>& renderer)
 250 {
 251   // Initialize the renderer as we are now in render thread
 252   renderer->Initialize(mImpl->graphicsController, mImpl->programController, mImpl->shaderCache, *(mImpl->uniformBufferManager.get()));
 253
 254   mImpl->rendererContainer.PushBack(renderer.Release());
 255 }
 256
 257 void RenderManager::RemoveRenderer(Render::Renderer* renderer)
 258 {
 259   mImpl->rendererContainer.EraseObject(renderer);
 260 }
 261
 262 void RenderManager::AddSampler(OwnerPointer<Render::Sampler>& sampler)
 263 {
 264   sampler->Initialize(mImpl->graphicsController);
 265   mImpl->samplerContainer.PushBack(sampler.Release());
 266 }
 267
 268 void RenderManager::RemoveSampler(Render::Sampler* sampler)
 269 {
 270   mImpl->samplerContainer.EraseObject(sampler);
 271 }
 272
 273 void RenderManager::AddTexture(OwnerPointer<Render::Texture>& texture)
 274 {
 275   texture->Initialize(mImpl->graphicsController);
 276   mImpl->textureContainer.PushBack(texture.Release());
 277 }
 278
 279 void RenderManager::RemoveTexture(Render::Texture* texture)
 280 {
 281   DALI_ASSERT_DEBUG(NULL != texture);
 282
 283   // Find the texture, use reference to pointer so we can do the erase safely
 284   for(auto&& iter : mImpl->textureContainer)
 285   {
 286     if(iter == texture)
 287     {
 288       texture->Destroy();
 289       mImpl->textureContainer.Erase(&iter); // Texture found; now destroy it
 290       return;
 291     }
 292   }
 293 }
 294
 295 void RenderManager::UploadTexture(Render::Texture* texture, PixelDataPtr pixelData, const Texture::UploadParams& params)
 296 {
 297   texture->Upload(pixelData, params);
 298 }
 299
 300 void RenderManager::GenerateMipmaps(Render::Texture* texture)
 301 {
 302   texture->GenerateMipmaps();
 303 }
 304
 305 void RenderManager::SetFilterMode(Render::Sampler* sampler, uint32_t minFilterMode, uint32_t magFilterMode)
 306 {
 307   sampler->SetFilterMode(static_cast<Dali::FilterMode::Type>(minFilterMode),
 308                          static_cast<Dali::FilterMode::Type>(magFilterMode));
 309 }
 310
 311 void RenderManager::SetWrapMode(Render::Sampler* sampler, uint32_t rWrapMode, uint32_t sWrapMode, uint32_t tWrapMode)
 312 {
 313   sampler->SetWrapMode(static_cast<Dali::WrapMode::Type>(rWrapMode),
 314                        static_cast<Dali::WrapMode::Type>(sWrapMode),
 315                        static_cast<Dali::WrapMode::Type>(tWrapMode));
 316 }
 317
 318 void RenderManager::AddFrameBuffer(OwnerPointer<Render::FrameBuffer>& frameBuffer)
 319 {
 320   Render::FrameBuffer* frameBufferPtr = frameBuffer.Release();
 321   mImpl->frameBufferContainer.PushBack(frameBufferPtr);
 322   frameBufferPtr->Initialize(mImpl->graphicsController);
 323 }
 324
 325 void RenderManager::RemoveFrameBuffer(Render::FrameBuffer* frameBuffer)
 326 {
 327   DALI_ASSERT_DEBUG(NULL != frameBuffer);
 328
 329   // Find the sampler, use reference so we can safely do the erase
 330   for(auto&& iter : mImpl->frameBufferContainer)
 331   {
 332     if(iter == frameBuffer)
 333     {
 334       frameBuffer->Destroy();
 335       mImpl->frameBufferContainer.Erase(&iter); // frameBuffer found; now destroy it
 336
 337       break;
 338     }
 339   }
 340 }
 341
 342 void RenderManager::InitializeScene(SceneGraph::Scene* scene)
 343 {
 344   scene->Initialize(*mImpl->CreateSceneContext(), mImpl->graphicsController, mImpl->depthBufferAvailable, mImpl->stencilBufferAvailable);
 345   mImpl->sceneContainer.push_back(scene);
 346 }
 347
 348 void RenderManager::UninitializeScene(SceneGraph::Scene* scene)
 349 {
 350   mImpl->DestroySceneContext(scene->GetContext());
 351
 352   auto iter = std::find(mImpl->sceneContainer.begin(), mImpl->sceneContainer.end(), scene);
 353   if(iter != mImpl->sceneContainer.end())
 354   {
 355     mImpl->sceneContainer.erase(iter);
 356   }
 357 }
 358
 359 void RenderManager::SurfaceReplaced(SceneGraph::Scene* scene)
 360 {
 361   Context* newContext = mImpl->ReplaceSceneContext(scene->GetContext());
 362   scene->Initialize(*newContext, mImpl->graphicsController, mImpl->depthBufferAvailable, mImpl->stencilBufferAvailable);
 363 }
 364
 365 void RenderManager::AttachColorTextureToFrameBuffer(Render::FrameBuffer* frameBuffer, Render::Texture* texture, uint32_t mipmapLevel, uint32_t layer)
 366 {
 367   frameBuffer->AttachColorTexture(texture, mipmapLevel, layer);
 368 }
 369
 370 void RenderManager::AttachDepthTextureToFrameBuffer(Render::FrameBuffer* frameBuffer, Render::Texture* texture, uint32_t mipmapLevel)
 371 {
 372   frameBuffer->AttachDepthTexture(texture, mipmapLevel);
 373 }
 374
 375 void RenderManager::AttachDepthStencilTextureToFrameBuffer(Render::FrameBuffer* frameBuffer, Render::Texture* texture, uint32_t mipmapLevel)
 376 {
 377   frameBuffer->AttachDepthStencilTexture(texture, mipmapLevel);
 378 }
 379
 380 void RenderManager::AddVertexBuffer(OwnerPointer<Render::VertexBuffer>& vertexBuffer)
 381 {
 382   mImpl->vertexBufferContainer.PushBack(vertexBuffer.Release());
 383 }
 384
 385 void RenderManager::RemoveVertexBuffer(Render::VertexBuffer* vertexBuffer)
 386 {
 387   mImpl->vertexBufferContainer.EraseObject(vertexBuffer);
 388 }
 389
 390 void RenderManager::SetVertexBufferFormat(Render::VertexBuffer* vertexBuffer, OwnerPointer<Render::VertexBuffer::Format>& format)
 391 {
 392   vertexBuffer->SetFormat(format.Release());
 393 }
 394
 395 void RenderManager::SetVertexBufferData(Render::VertexBuffer* vertexBuffer, OwnerPointer<Vector<uint8_t>>& data, uint32_t size)
 396 {
 397   vertexBuffer->SetData(data.Release(), size);
 398 }
 399
 400 void RenderManager::SetIndexBuffer(Render::Geometry* geometry, Dali::Vector<uint16_t>& indices)
 401 {
 402   geometry->SetIndexBuffer(indices);
 403 }
 404
 405 void RenderManager::AddGeometry(OwnerPointer<Render::Geometry>& geometry)
 406 {
 407   mImpl->geometryContainer.PushBack(geometry.Release());
 408 }
 409
 410 void RenderManager::RemoveGeometry(Render::Geometry* geometry)
 411 {
 412   mImpl->geometryContainer.EraseObject(geometry);
 413 }
 414
 415 void RenderManager::AttachVertexBuffer(Render::Geometry* geometry, Render::VertexBuffer* vertexBuffer)
 416 {
 417   DALI_ASSERT_DEBUG(NULL != geometry);
 418
 419   // Find the geometry
 420   for(auto&& iter : mImpl->geometryContainer)
 421   {
 422     if(iter == geometry)
 423     {
 424       iter->AddVertexBuffer(vertexBuffer);
 425       break;
 426     }
 427   }
 428 }
 429
 430 void RenderManager::RemoveVertexBuffer(Render::Geometry* geometry, Render::VertexBuffer* vertexBuffer)
 431 {
 432   DALI_ASSERT_DEBUG(NULL != geometry);
 433
 434   // Find the geometry
 435   for(auto&& iter : mImpl->geometryContainer)
 436   {
 437     if(iter == geometry)
 438     {
 439       iter->RemoveVertexBuffer(vertexBuffer);
 440       break;
 441     }
 442   }
 443 }
 444
 445 void RenderManager::SetGeometryType(Render::Geometry* geometry, uint32_t geometryType)
 446 {
 447   geometry->SetType(Render::Geometry::Type(geometryType));
 448 }
 449
 450 void RenderManager::AddRenderTracker(Render::RenderTracker* renderTracker)
 451 {
 452   mImpl->AddRenderTracker(renderTracker);
 453 }
 454
 455 void RenderManager::RemoveRenderTracker(Render::RenderTracker* renderTracker)
 456 {
 457   mImpl->RemoveRenderTracker(renderTracker);
 458 }
 459
 460 ProgramCache* RenderManager::GetProgramCache()
 461 {
 462   return &(mImpl->programController);
 463 }
 464
 465 void RenderManager::PreRender(Integration::RenderStatus& status, bool forceClear, bool uploadOnly)
 466 {
 467   DALI_PRINT_RENDER_START(mImpl->renderBufferIndex);
 468
 469   // Core::Render documents that GL context must be current before calling Render
 470   DALI_ASSERT_DEBUG(mImpl->context.IsGlContextCreated());
 471
 472   // Increment the frame count at the beginning of each frame
 473   ++mImpl->frameCount;
 474
 475   // Process messages queued during previous update
 476   mImpl->renderQueue.ProcessMessages(mImpl->renderBufferIndex);
 477
 478   uint32_t count = 0u;
 479   for(uint32_t i = 0; i < mImpl->sceneContainer.size(); ++i)
 480   {
 481     count += mImpl->sceneContainer[i]->GetRenderInstructions().Count(mImpl->renderBufferIndex);
 482   }
 483
 484   const bool haveInstructions = count > 0u;
 485
 486   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");
 487
 488   // Only render if we have instructions to render, or the last frame was rendered (and therefore a clear is required).
 489   if(haveInstructions || mImpl->lastFrameWasRendered || forceClear)
 490   {
 491     DALI_LOG_INFO(gLogFilter, Debug::General, "Render: Processing\n");
 492
 493     // Switch to the shared context
 494     if(mImpl->currentContext != &mImpl->context)
 495     {
 496       mImpl->currentContext = &mImpl->context;
 497
 498       // Clear the current cached program when the context is switched
 499       mImpl->programController.ClearCurrentProgram();
 500     }
 501
 502     // Upload the geometries
 503     for(uint32_t i = 0; i < mImpl->sceneContainer.size(); ++i)
 504     {
 505       RenderInstructionContainer& instructions = mImpl->sceneContainer[i]->GetRenderInstructions();
 506       for(uint32_t j = 0; j < instructions.Count(mImpl->renderBufferIndex); ++j)
 507       {
 508         RenderInstruction& instruction = instructions.At(mImpl->renderBufferIndex, j);
 509
 510         const Matrix* viewMatrix       = instruction.GetViewMatrix(mImpl->renderBufferIndex);
 511         const Matrix* projectionMatrix = instruction.GetProjectionMatrix(mImpl->renderBufferIndex);
 512
 513         DALI_ASSERT_DEBUG(viewMatrix);
 514         DALI_ASSERT_DEBUG(projectionMatrix);
 515
 516         if(viewMatrix && projectionMatrix)
 517         {
 518           const RenderListContainer::SizeType renderListCount = instruction.RenderListCount();
 519
 520           // Iterate through each render list.
 521           for(RenderListContainer::SizeType index = 0; index < renderListCount; ++index)
 522           {
 523             const RenderList* renderList = instruction.GetRenderList(index);
 524
 525             if(renderList && !renderList->IsEmpty())
 526             {
 527               const std::size_t itemCount = renderList->Count();
 528               for(uint32_t itemIndex = 0u; itemIndex < itemCount; ++itemIndex)
 529               {
 530                 const RenderItem& item = renderList->GetItem(itemIndex);
 531                 if(DALI_LIKELY(item.mRenderer))
 532                 {
 533                   item.mRenderer->Upload();
 534                 }
 535               }
 536             }
 537           }
 538         }
 539       }
 540     }
 541   }
 542 }
 543
 544 void RenderManager::PreRender(Integration::Scene& scene, std::vector<Rect<int>>& damagedRects)
 545 {
 546   if(mImpl->partialUpdateAvailable != Integration::PartialUpdateAvailable::TRUE)
 547   {
 548     return;
 549   }
 550
 551   Internal::Scene&   sceneInternal = GetImplementation(scene);
 552   SceneGraph::Scene* sceneObject   = sceneInternal.GetSceneObject();
 553
 554   if(sceneObject->IsRenderingSkipped())
 555   {
 556     // We don't need to calculate dirty rects
 557     return;
 558   }
 559
 560   class DamagedRectsCleaner
 561   {
 562   public:
 563     DamagedRectsCleaner(std::vector<Rect<int>>& damagedRects)
 564     : mDamagedRects(damagedRects),
 565       mCleanOnReturn(true)
 566     {
 567     }
 568
 569     void SetCleanOnReturn(bool cleanOnReturn)
 570     {
 571       mCleanOnReturn = cleanOnReturn;
 572     }
 573
 574     ~DamagedRectsCleaner()
 575     {
 576       if(mCleanOnReturn)
 577       {
 578         mDamagedRects.clear();
 579       }
 580     }
 581
 582   private:
 583     std::vector<Rect<int>>& mDamagedRects;
 584     bool                    mCleanOnReturn;
 585   };
 586
 587   Rect<int32_t> surfaceRect = sceneObject->GetSurfaceRect();
 588
 589   // Clean collected dirty/damaged rects on exit if 3d layer or 3d node or other conditions.
 590   DamagedRectsCleaner damagedRectCleaner(damagedRects);
 591
 592   // Mark previous dirty rects in the sorted array. The array is already sorted by node and renderer, frame number.
 593   // so you don't need to sort: std::stable_sort(itemsDirtyRects.begin(), itemsDirtyRects.end());
 594   std::vector<DirtyRect>& itemsDirtyRects = sceneInternal.GetItemsDirtyRects();
 595   for(DirtyRect& dirtyRect : itemsDirtyRects)
 596   {
 597     dirtyRect.visited = false;
 598   }
 599
 600   uint32_t count = sceneObject->GetRenderInstructions().Count(mImpl->renderBufferIndex);
 601   for(uint32_t i = 0; i < count; ++i)
 602   {
 603     RenderInstruction& instruction = sceneObject->GetRenderInstructions().At(mImpl->renderBufferIndex, i);
 604
 605     if(instruction.mFrameBuffer)
 606     {
 607       return; // TODO: reset, we don't deal with render tasks with framebuffers (for now)
 608     }
 609
 610     const Camera* camera = instruction.GetCamera();
 611     if(camera->mType == Camera::DEFAULT_TYPE && camera->mTargetPosition == Camera::DEFAULT_TARGET_POSITION)
 612     {
 613       const Node* node = instruction.GetCamera()->GetNode();
 614       if(node)
 615       {
 616         Vector3    position;
 617         Vector3    scale;
 618         Quaternion orientation;
 619         node->GetWorldMatrix(mImpl->renderBufferIndex).GetTransformComponents(position, orientation, scale);
 620
 621         Vector3 orientationAxis;
 622         Radian  orientationAngle;
 623         orientation.ToAxisAngle(orientationAxis, orientationAngle);
 624
 625         if(position.x > Math::MACHINE_EPSILON_10000 ||
 626            position.y > Math::MACHINE_EPSILON_10000 ||
 627            orientationAxis != Vector3(0.0f, 1.0f, 0.0f) ||
 628            orientationAngle != ANGLE_180 ||
 629            scale != Vector3(1.0f, 1.0f, 1.0f))
 630         {
 631           return;
 632         }
 633       }
 634     }
 635     else
 636     {
 637       return;
 638     }
 639
 640     Rect<int32_t> viewportRect;
 641     if(instruction.mIsViewportSet)
 642     {
 643       const int32_t y = (surfaceRect.height - instruction.mViewport.height) - instruction.mViewport.y;
 644       viewportRect.Set(instruction.mViewport.x, y, instruction.mViewport.width, instruction.mViewport.height);
 645       if(viewportRect.IsEmpty() || !viewportRect.IsValid())
 646       {
 647         return; // just skip funny use cases for now, empty viewport means it is set somewhere else
 648       }
 649     }
 650     else
 651     {
 652       viewportRect = surfaceRect;
 653     }
 654
 655     const Matrix* viewMatrix       = instruction.GetViewMatrix(mImpl->renderBufferIndex);
 656     const Matrix* projectionMatrix = instruction.GetProjectionMatrix(mImpl->renderBufferIndex);
 657     if(viewMatrix && projectionMatrix)
 658     {
 659       const RenderListContainer::SizeType count = instruction.RenderListCount();
 660       for(RenderListContainer::SizeType index = 0u; index < count; ++index)
 661       {
 662         const RenderList* renderList = instruction.GetRenderList(index);
 663         if(renderList && !renderList->IsEmpty())
 664         {
 665           const std::size_t count = renderList->Count();
 666           for(uint32_t index = 0u; index < count; ++index)
 667           {
 668             RenderItem& item = renderList->GetItem(index);
 669             // If the item does 3D transformation, do early exit and clean the damaged rect array
 670             if(item.mUpdateSize == Vector3::ZERO)
 671             {
 672               return;
 673             }
 674
 675             Rect<int> rect;
 676             DirtyRect dirtyRect(item.mNode, item.mRenderer, mImpl->frameCount, rect);
 677             // If the item refers to updated node or renderer.
 678             if(item.mIsUpdated ||
 679                (item.mNode &&
 680                 (item.mNode->Updated() || (item.mRenderer && item.mRenderer->Updated(mImpl->renderBufferIndex, item.mNode)))))
 681             {
 682               item.mIsUpdated = false;
 683               item.mNode->SetUpdated(false);
 684
 685               rect = item.CalculateViewportSpaceAABB(item.mUpdateSize, viewportRect.width, viewportRect.height);
 686               if(rect.IsValid() && rect.Intersect(viewportRect) && !rect.IsEmpty())
 687               {
 688                 const int left   = rect.x;
 689                 const int top    = rect.y;
 690                 const int right  = rect.x + rect.width;
 691                 const int bottom = rect.y + rect.height;
 692                 rect.x           = (left / 16) * 16;
 693                 rect.y           = (top / 16) * 16;
 694                 rect.width       = ((right + 16) / 16) * 16 - rect.x;
 695                 rect.height      = ((bottom + 16) / 16) * 16 - rect.y;
 696
 697                 // Found valid dirty rect.
 698                 // 1. Insert it in the sorted array of the dirty rects.
 699                 // 2. Mark the related dirty rects as visited so they will not be removed below.
 700                 // 3. Keep only last 3 dirty rects for the same node and renderer (Tizen uses 3 back buffers, Ubuntu 1).
 701                 dirtyRect.rect    = rect;
 702                 auto dirtyRectPos = std::lower_bound(itemsDirtyRects.begin(), itemsDirtyRects.end(), dirtyRect);
 703                 dirtyRectPos      = itemsDirtyRects.insert(dirtyRectPos, dirtyRect);
 704
 705                 int c = 1;
 706                 while(++dirtyRectPos != itemsDirtyRects.end())
 707                 {
 708                   if(dirtyRectPos->node != item.mNode || dirtyRectPos->renderer != item.mRenderer)
 709                   {
 710                     break;
 711                   }
 712
 713                   dirtyRectPos->visited = true;
 714                   Rect<int>& dirtRect   = dirtyRectPos->rect;
 715                   rect.Merge(dirtRect);
 716
 717                   c++;
 718                   if(c > 3) // no more then 3 previous rects
 719                   {
 720                     itemsDirtyRects.erase(dirtyRectPos);
 721                     break;
 722                   }
 723                 }
 724
 725                 damagedRects.push_back(rect);
 726               }
 727             }
 728             else
 729             {
 730               // 1. The item is not dirty, the node and renderer referenced by the item are still exist.
 731               // 2. Mark the related dirty rects as visited so they will not be removed below.
 732               auto dirtyRectPos = std::lower_bound(itemsDirtyRects.begin(), itemsDirtyRects.end(), dirtyRect);
 733               while(dirtyRectPos != itemsDirtyRects.end())
 734               {
 735                 if(dirtyRectPos->node != item.mNode || dirtyRectPos->renderer != item.mRenderer)
 736                 {
 737                   break;
 738                 }
 739
 740                 dirtyRectPos->visited = true;
 741                 dirtyRectPos++;
 742               }
 743             }
 744           }
 745         }
 746       }
 747     }
 748   }
 749
 750   // Check removed nodes or removed renderers dirty rects
 751   auto i = itemsDirtyRects.begin();
 752   auto j = itemsDirtyRects.begin();
 753   while(i != itemsDirtyRects.end())
 754   {
 755     if(i->visited)
 756     {
 757       *j++ = *i;
 758     }
 759     else
 760     {
 761       Rect<int>& dirtRect = i->rect;
 762       damagedRects.push_back(dirtRect);
 763     }
 764     i++;
 765   }
 766
 767   itemsDirtyRects.resize(j - itemsDirtyRects.begin());
 768   damagedRectCleaner.SetCleanOnReturn(false);
 769 }
 770
 771 void RenderManager::RenderScene(Integration::RenderStatus& status, Integration::Scene& scene, bool renderToFbo)
 772 {
 773   Rect<int> clippingRect;
 774   RenderScene(status, scene, renderToFbo, clippingRect);
 775 }
 776
 777 void RenderManager::RenderScene(Integration::RenderStatus& status, Integration::Scene& scene, bool renderToFbo, Rect<int>& clippingRect)
 778 {
 779   // Reset main algorithms command buffer
 780   mImpl->renderAlgorithms.ResetCommandBuffer();
 781
 782   auto mainCommandBuffer = mImpl->renderAlgorithms.GetMainCommandBuffer();
 783
 784   Internal::Scene&   sceneInternal = GetImplementation(scene);
 785   SceneGraph::Scene* sceneObject   = sceneInternal.GetSceneObject();
 786
 787   uint32_t count = sceneObject->GetRenderInstructions().Count(mImpl->renderBufferIndex);
 788
 789   std::vector<Graphics::RenderTarget*> targetstoPresent;
 790
 791   for(uint32_t i = 0; i < count; ++i)
 792   {
 793     RenderInstruction& instruction = sceneObject->GetRenderInstructions().At(mImpl->renderBufferIndex, i);
 794
 795     if((renderToFbo && !instruction.mFrameBuffer) || (!renderToFbo && instruction.mFrameBuffer))
 796     {
 797       continue; // skip
 798     }
 799
 800     // Mark that we will require a post-render step to be performed (includes swap-buffers).
 801     status.SetNeedsPostRender(true);
 802
 803     Rect<int32_t> viewportRect;
 804     Vector4       clearColor;
 805
 806     if(instruction.mIsClearColorSet)
 807     {
 808       clearColor = instruction.mClearColor;
 809     }
 810     else
 811     {
 812       clearColor = Dali::RenderTask::DEFAULT_CLEAR_COLOR;
 813     }
 814
 815     Rect<int32_t> surfaceRect        = sceneObject->GetSurfaceRect();
 816     int32_t       surfaceOrientation = sceneObject->GetSurfaceOrientation();
 817
 818     // @todo Should these be part of scene?
 819     Integration::DepthBufferAvailable   depthBufferAvailable   = mImpl->depthBufferAvailable;
 820     Integration::StencilBufferAvailable stencilBufferAvailable = mImpl->stencilBufferAvailable;
 821
 822     Graphics::RenderTarget*           currentRenderTarget = nullptr;
 823     Graphics::RenderPass*             currentRenderPass   = nullptr;
 824     std::vector<Graphics::ClearValue> currentClearValues{};
 825
 826     if(instruction.mFrameBuffer)
 827     {
 828       // Ensure graphics framebuffer is created, bind atachments and create render passes
 829       // Only happens once per framebuffer. If the create fails, e.g. no attachments yet,
 830       // then don't render to this framebuffer.
 831       if(!instruction.mFrameBuffer->GetGraphicsObject())
 832       {
 833         const bool created = instruction.mFrameBuffer->CreateGraphicsObjects();
 834         if(!created)
 835         {
 836           continue;
 837         }
 838       }
 839
 840       auto& clearValues = instruction.mFrameBuffer->GetGraphicsRenderPassClearValues();
 841
 842       // Set the clear color for first color attachment
 843       if(instruction.mIsClearColorSet && clearValues.size() > 0)
 844       {
 845         clearValues[0].color = {
 846           instruction.mClearColor.r,
 847           instruction.mClearColor.g,
 848           instruction.mClearColor.b,
 849           instruction.mClearColor.a};
 850       }
 851
 852       currentClearValues = clearValues;
 853
 854       auto loadOp = instruction.mIsClearColorSet ? Graphics::AttachmentLoadOp::CLEAR : Graphics::AttachmentLoadOp::LOAD;
 855
 856       // offscreen buffer
 857       currentRenderTarget = instruction.mFrameBuffer->GetGraphicsRenderTarget();
 858       currentRenderPass   = instruction.mFrameBuffer->GetGraphicsRenderPass(loadOp, Graphics::AttachmentStoreOp::STORE);
 859
 860       if(mImpl->currentContext != &mImpl->context)
 861       {
 862         // Switch to shared context for off-screen buffer
 863         mImpl->currentContext = &mImpl->context;
 864
 865         // Clear the current cached program when the context is switched
 866         mImpl->programController.ClearCurrentProgram();
 867       }
 868     }
 869     else // no framebuffer
 870     {
 871       if(mImpl->currentContext->IsSurfacelessContextSupported())
 872       {
 873         if(mImpl->currentContext != sceneObject->GetContext())
 874         {
 875           // Switch the correct context if rendering to a surface
 876           mImpl->currentContext = sceneObject->GetContext();
 877
 878           // Clear the current cached program when the context is switched
 879           mImpl->programController.ClearCurrentProgram();
 880         }
 881       }
 882
 883       // surface
 884       auto& clearValues = sceneObject->GetGraphicsRenderPassClearValues();
 885
 886       if(instruction.mIsClearColorSet)
 887       {
 888         clearValues[0].color = {
 889           instruction.mClearColor.r,
 890           instruction.mClearColor.g,
 891           instruction.mClearColor.b,
 892           instruction.mClearColor.a};
 893       }
 894
 895       currentClearValues = clearValues;
 896
 897       // @todo SceneObject should already have the depth clear / stencil clear in the clearValues array.
 898       // if the window has a depth/stencil buffer.
 899       if((depthBufferAvailable == Integration::DepthBufferAvailable::TRUE ||
 900           stencilBufferAvailable == Integration::StencilBufferAvailable::TRUE) &&
 901          (currentClearValues.size() <= 1))
 902       {
 903         currentClearValues.emplace_back();
 904         currentClearValues.back().depthStencil.depth   = 0;
 905         currentClearValues.back().depthStencil.stencil = 0;
 906       }
 907
 908       auto loadOp = instruction.mIsClearColorSet ? Graphics::AttachmentLoadOp::CLEAR : Graphics::AttachmentLoadOp::LOAD;
 909
 910       currentRenderTarget = sceneObject->GetSurfaceRenderTarget();
 911       currentRenderPass   = sceneObject->GetGraphicsRenderPass(loadOp, Graphics::AttachmentStoreOp::STORE);
 912     }
 913
 914     targetstoPresent.emplace_back(currentRenderTarget);
 915
 916     // Make sure that GL context must be created
 917     mImpl->currentContext->GlContextCreated();
 918
 919     // reset the program matrices for all programs once per frame
 920     // this ensures we will set view and projection matrix once per program per camera
 921     mImpl->programController.ResetProgramMatrices();
 922
 923     if(instruction.mFrameBuffer)
 924     {
 925       // For each offscreen buffer, update the dependency list with the new texture id used by this frame buffer.
 926       for(unsigned int i0 = 0, i1 = instruction.mFrameBuffer->GetColorAttachmentCount(); i0 < i1; ++i0)
 927       {
 928         mImpl->textureDependencyList.PushBack(instruction.mFrameBuffer->GetTexture(i0));
 929       }
 930     }
 931
 932     if(!instruction.mIgnoreRenderToFbo && (instruction.mFrameBuffer != nullptr))
 933     {
 934       // Offscreen buffer rendering
 935       if(instruction.mIsViewportSet)
 936       {
 937         // For glViewport the lower-left corner is (0,0)
 938         const int32_t y = (instruction.mFrameBuffer->GetHeight() - instruction.mViewport.height) - instruction.mViewport.y;
 939         viewportRect.Set(instruction.mViewport.x, y, instruction.mViewport.width, instruction.mViewport.height);
 940       }
 941       else
 942       {
 943         viewportRect.Set(0, 0, instruction.mFrameBuffer->GetWidth(), instruction.mFrameBuffer->GetHeight());
 944       }
 945       surfaceOrientation = 0;
 946     }
 947     else // No Offscreen frame buffer rendering
 948     {
 949       // Check whether a viewport is specified, otherwise the full surface size is used
 950       if(instruction.mIsViewportSet)
 951       {
 952         // For glViewport the lower-left corner is (0,0)
 953         const int32_t y = (surfaceRect.height - instruction.mViewport.height) - instruction.mViewport.y;
 954         viewportRect.Set(instruction.mViewport.x, y, instruction.mViewport.width, instruction.mViewport.height);
 955       }
 956       else
 957       {
 958         viewportRect = surfaceRect;
 959       }
 960     }
 961
 962     // Set surface orientation
 963     mImpl->currentContext->SetSurfaceOrientation(surfaceOrientation);
 964
 965     /*** Clear region of framebuffer or surface before drawing ***/
 966
 967     bool clearFullFrameRect = true;
 968     if(instruction.mFrameBuffer != nullptr)
 969     {
 970       Viewport frameRect(0, 0, instruction.mFrameBuffer->GetWidth(), instruction.mFrameBuffer->GetHeight());
 971       clearFullFrameRect = (frameRect == viewportRect);
 972     }
 973     else
 974     {
 975       clearFullFrameRect = (surfaceRect == viewportRect);
 976     }
 977
 978     if(!clippingRect.IsEmpty())
 979     {
 980       if(!clippingRect.Intersect(viewportRect))
 981       {
 982         DALI_LOG_ERROR("Invalid clipping rect %d %d %d %d\n", clippingRect.x, clippingRect.y, clippingRect.width, clippingRect.height);
 983         clippingRect = Rect<int>();
 984       }
 985       clearFullFrameRect = false;
 986     }
 987
 988     Graphics::Rect2D scissorArea{viewportRect.x, viewportRect.y, uint32_t(viewportRect.width), uint32_t(viewportRect.height)};
 989     if(instruction.mIsClearColorSet)
 990     {
 991       if(!clearFullFrameRect)
 992       {
 993         if(!clippingRect.IsEmpty())
 994         {
 995           scissorArea = {clippingRect.x, clippingRect.y, uint32_t(clippingRect.width), uint32_t(clippingRect.height)};
 996         }
 997       }
 998     }
 999
1000     // Begin render pass
1001     mainCommandBuffer->BeginRenderPass(
1002       currentRenderPass,
1003       currentRenderTarget,
1004       scissorArea,
1005       currentClearValues);
1006
1007     mainCommandBuffer->SetViewport({float(viewportRect.x),
1008                                     float(viewportRect.y),
1009                                     float(viewportRect.width),
1010                                     float(viewportRect.height)});
1011
1012     // Clear the list of bound textures
1013     mImpl->boundTextures.Clear();
1014
1015     mImpl->renderAlgorithms.ProcessRenderInstruction(
1016       instruction,
1017       mImpl->renderBufferIndex,
1018       depthBufferAvailable,
1019       stencilBufferAvailable,
1020       mImpl->boundTextures,
1021       viewportRect,
1022       clippingRect,
1023       surfaceOrientation);
1024
1025     // Synchronise the FBO/Texture access when there are multiple contexts
1026     if(mImpl->currentContext->IsSurfacelessContextSupported())
1027     {
1028       // Check whether any bound texture is in the dependency list
1029       bool textureFound = false;
1030
1031       if(mImpl->boundTextures.Count() > 0u && mImpl->textureDependencyList.Count() > 0u)
1032       {
1033         for(auto texture : mImpl->textureDependencyList)
1034         {
1035           textureFound = std::find_if(mImpl->boundTextures.Begin(), mImpl->boundTextures.End(), [texture](Graphics::Texture* graphicsTexture) {
1036                            return texture == graphicsTexture;
1037                          }) != mImpl->boundTextures.End();
1038         }
1039       }
1040
1041       if(textureFound)
1042       {
1043         if(instruction.mFrameBuffer)
1044         {
1045           // For off-screen buffer
1046
1047           // Clear the dependency list
1048           mImpl->textureDependencyList.Clear();
1049         }
1050         else
1051         {
1052           // Worker thread lambda function
1053           auto& glContextHelperAbstraction = mImpl->graphicsController.GetGlContextHelperAbstraction();
1054           auto  workerFunction             = [&glContextHelperAbstraction](int workerThread) {
1055             // Switch to the shared context in the worker thread
1056             glContextHelperAbstraction.MakeSurfacelessContextCurrent();
1057
1058             // Wait until all rendering calls for the shared context are executed
1059             glContextHelperAbstraction.WaitClient();
1060
1061             // Must clear the context in the worker thread
1062             // Otherwise the shared context cannot be switched to from the render thread
1063             glContextHelperAbstraction.MakeContextNull();
1064           };
1065
1066           auto future = mImpl->threadPool->SubmitTask(0u, workerFunction);
1067           if(future)
1068           {
1069             mImpl->threadPool->Wait();
1070
1071             // Clear the dependency list
1072             mImpl->textureDependencyList.Clear();
1073           }
1074         }
1075       }
1076     }
1077
1078     if(instruction.mRenderTracker && instruction.mFrameBuffer)
1079     {
1080       // This will create a sync object every frame this render tracker
1081       // is alive (though it should be now be created only for
1082       // render-once render tasks)
1083       instruction.mRenderTracker->CreateSyncObject(mImpl->graphicsController.GetGlSyncAbstraction());
1084       instruction.mRenderTracker = nullptr; // Only create once.
1085     }
1086
1087     // End render pass
1088     mainCommandBuffer->EndRenderPass();
1089   }
1090   mImpl->renderAlgorithms.SubmitCommandBuffer();
1091
1092   std::sort(targetstoPresent.begin(), targetstoPresent.end());
1093
1094   Graphics::RenderTarget* rt = nullptr;
1095   for(auto& target : targetstoPresent)
1096   {
1097     if(target != rt)
1098     {
1099       mImpl->graphicsController.PresentRenderTarget(target);
1100       rt = target;
1101     }
1102   }
1103 }
1104
1105 void RenderManager::PostRender(bool uploadOnly)
1106 {
1107   // Notify RenderGeometries that rendering has finished
1108   for(auto&& iter : mImpl->geometryContainer)
1109   {
1110     iter->OnRenderFinished();
1111   }
1112
1113   mImpl->UpdateTrackers();
1114
1115   uint32_t count = 0u;
1116   for(uint32_t i = 0; i < mImpl->sceneContainer.size(); ++i)
1117   {
1118     count += mImpl->sceneContainer[i]->GetRenderInstructions().Count(mImpl->renderBufferIndex);
1119   }
1120
1121   const bool haveInstructions = count > 0u;
1122
1123   // If this frame was rendered due to instructions existing, we mark this so we know to clear the next frame.
1124   mImpl->lastFrameWasRendered = haveInstructions;
1125
1126   /**
1127    * The rendering has finished; swap to the next buffer.
1128    * Ideally the update has just finished using this buffer; otherwise the render thread
1129    * should block until the update has finished.
1130    */
1131   mImpl->renderBufferIndex = (0 != mImpl->renderBufferIndex) ? 0 : 1;
1132
1133   DALI_PRINT_RENDER_END();
1134 }
1135
1136 } // namespace SceneGraph
1137
1138 } // namespace Internal
1139
1140 } // namespace Dali