Mercurial > hg > orthanc-stone
view OrthancStone/Sources/Scene2D/Internals/CompositorHelper.cpp @ 1852:5ead1852095a StoneWebViewer-2.1
StoneWebViewer-2.1
author | Sebastien Jodogne <s.jodogne@gmail.com> |
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date | Tue, 29 Jun 2021 16:26:47 +0200 |
parents | 9ac2a65d4172 |
children | 3889ae96d2e9 |
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/** * Stone of Orthanc * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics * Department, University Hospital of Liege, Belgium * Copyright (C) 2017-2021 Osimis S.A., Belgium * * This program is free software: you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public License * as published by the Free Software Foundation, either version 3 of * the License, or (at your option) any later version. * * This program is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this program. If not, see * <http://www.gnu.org/licenses/>. **/ #include "CompositorHelper.h" #include <OrthancException.h> namespace OrthancStone { namespace Internals { class CompositorHelper::Item : public boost::noncopyable { private: std::unique_ptr<ILayerRenderer> renderer_; const ISceneLayer& layer_; uint64_t layerIdentifier_; uint64_t lastRevision_; public: Item(ILayerRenderer* renderer, // Takes ownership const ISceneLayer& layer, uint64_t layerIdentifier) : renderer_(renderer), layer_(layer), layerIdentifier_(layerIdentifier), lastRevision_(layer.GetRevision()) { if (renderer == NULL) { throw Orthanc::OrthancException(Orthanc::ErrorCode_NullPointer); } } ILayerRenderer& GetRenderer() const { assert(renderer_.get() != NULL); return *renderer_; } const ISceneLayer& GetLayer() const { return layer_; } uint64_t GetLayerIdentifier() const { return layerIdentifier_; } uint64_t GetLastRevision() const { return lastRevision_; } void UpdateRenderer() { assert(renderer_.get() != NULL); renderer_->Update(layer_); lastRevision_ = layer_.GetRevision(); } }; void CompositorHelper::Visit(const Scene2D& scene, const ISceneLayer& layer, uint64_t layerIdentifier, int depth) { // "Visit()" is only applied to layers existing in the scene assert(scene.HasLayer(depth)); Content::iterator found = content_.find(depth); assert(found == content_.end() || found->second != NULL); if (found == content_.end() || found->second->GetLayerIdentifier() != layerIdentifier) { // This is the first time this layer is rendered, or the layer // is not the same as before if (found != content_.end()) { delete found->second; content_.erase(found); } // the returned renderer can be NULL in case of an unknown layer // or a NullLayer std::unique_ptr<ILayerRenderer> renderer(factory_.Create(layer)); if (renderer.get() != NULL) { renderer->Render(sceneTransform_, canvasWidth_, canvasHeight_); content_[depth] = new Item(renderer.release(), layer, layerIdentifier); } } else { // This layer has already been rendered assert(found->second->GetLastRevision() <= layer.GetRevision()); if (found->second->GetLastRevision() < layer.GetRevision()) { found->second->UpdateRenderer(); } found->second->GetRenderer().Render(sceneTransform_, canvasWidth_, canvasHeight_); } // Check invariants assert(content_.find(depth) == content_.end() || (content_[depth]->GetLayerIdentifier() == layerIdentifier && content_[depth]->GetLastRevision() == layer.GetRevision())); } CompositorHelper::~CompositorHelper() { for (Content::iterator it = content_.begin(); it != content_.end(); ++it) { assert(it->second != NULL); delete it->second; } } void CompositorHelper::Refresh(const Scene2D& scene, unsigned int canvasWidth, unsigned int canvasHeight) { /** * Safeguard mechanism to enforce the fact that the same scene * is always used with the compositor. Note that the safeguard * is not 100% bullet-proof, as a new scene might reuse the same * address as a previous scene. **/ if (lastScene_ != NULL && lastScene_ != &scene) { throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls, "ICompositor::ResetScene() should have been called"); } lastScene_ = &scene; // Bring coordinate (0,0) to the center of the canvas AffineTransform2D offset = AffineTransform2D::CreateOffset( static_cast<double>(canvasWidth) / 2.0, static_cast<double>(canvasHeight) / 2.0); sceneTransform_ = AffineTransform2D::Combine(offset, scene.GetSceneToCanvasTransform()); canvasWidth_ = canvasWidth; canvasHeight_ = canvasHeight; scene.Apply(*this); } } }