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