Mercurial > hg > orthanc-stone
diff OrthancStone/Sources/Platforms/WebAssembly/WebGLViewportsRegistry.h @ 1899:917500c46fe0
moved the Platform folder from the Applications folder to the Stone library itself
author | Alain Mazy <am@osimis.io> |
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date | Sat, 29 Jan 2022 12:47:32 +0100 |
parents | |
children | 07964689cb0b |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/OrthancStone/Sources/Platforms/WebAssembly/WebGLViewportsRegistry.h Sat Jan 29 12:47:32 2022 +0100 @@ -0,0 +1,93 @@ +/** + * Stone of Orthanc + * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics + * Department, University Hospital of Liege, Belgium + * Copyright (C) 2017-2022 Osimis S.A., Belgium + * Copyright (C) 2021-2022 Sebastien Jodogne, ICTEAM UCLouvain, 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/>. + **/ + + +#pragma once + +#include "WebGLViewport.h" + +#include <boost/enable_shared_from_this.hpp> + +namespace OrthancStone +{ + /** + * This singleton class must be used if many WebGL viewports are + * created by the higher-level application, implying possible loss + * of WebGL contexts. The object will run an infinite update loop + * that checks whether all the WebGL context are still valid (not + * lost). If some WebGL context is lost, it is automatically + * reinitialized by created a fresh HTML5 canvas. + **/ + class WebGLViewportsRegistry : public boost::noncopyable, + public boost::enable_shared_from_this<WebGLViewportsRegistry> + { + private: + typedef std::map<std::string, boost::shared_ptr<WebGLViewport> > Viewports; + + double timeoutMS_; + Viewports viewports_; + long timeOutID_; + + void LaunchTimer(); + + void OnTimeout(); + + static void OnTimeoutCallback(void *userData); + + public: + explicit WebGLViewportsRegistry(double timeoutMS /* in milliseconds */); + + ~WebGLViewportsRegistry(); + + boost::shared_ptr<WebGLViewport> Add(const std::string& canvasId); + + void Remove(const std::string& canvasId); + + void Clear(); + + class Accessor : public boost::noncopyable + { + private: + WebGLViewportsRegistry& that_; + std::unique_ptr<IViewport::ILock> lock_; + + public: + Accessor(WebGLViewportsRegistry& that, + const std::string& canvasId); + + bool IsValid() const + { + return lock_.get() != NULL; + } + + IViewport::ILock& GetViewport() const; + }; + + + + static void FinalizeGlobalRegistry(); + + static void SetGlobalRegistryTimeout(double timeout); + + static WebGLViewportsRegistry& GetGlobalRegistry(); + }; +}