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annotate Applications/Platforms/WebAssembly/WebGLViewportsRegistry.h @ 1739:9ac2a65d4172

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upgrade to year 2021
author Sebastien Jodogne <s.jodogne@gmail.com>
date Wed, 06 Jan 2021 17:50:00 +0100
parents 5887a4f8594b
children 3889ae96d2e9
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1 /**
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2 * Stone of Orthanc
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3 * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics
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4 * Department, University Hospital of Liege, Belgium
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5 * Copyright (C) 2017-2021 Osimis S.A., Belgium
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6 *
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7 * This program is free software: you can redistribute it and/or
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8 * modify it under the terms of the GNU Affero General Public License
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9 * as published by the Free Software Foundation, either version 3 of
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10 * the License, or (at your option) any later version.
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11 *
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12 * This program is distributed in the hope that it will be useful, but
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13 * WITHOUT ANY WARRANTY; without even the implied warranty of
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14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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15 * Affero General Public License for more details.
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16 *
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17 * You should have received a copy of the GNU Affero General Public License
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18 * along with this program. If not, see <http://www.gnu.org/licenses/>.
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19 **/
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20
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21
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22 #pragma once
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23
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24 #include "WebGLViewport.h"
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26 #include <boost/enable_shared_from_this.hpp>
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27
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28 namespace OrthancStone
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29 {
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30 /**
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31 * This singleton class must be used if many WebGL viewports are
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32 * created by the higher-level application, implying possible loss
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33 * of WebGL contexts. The object will run an infinite update loop
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34 * that checks whether all the WebGL context are still valid (not
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35 * lost). If some WebGL context is lost, it is automatically
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36 * reinitialized by created a fresh HTML5 canvas.
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37 **/
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38 class WebGLViewportsRegistry : public boost::noncopyable,
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39 public boost::enable_shared_from_this<WebGLViewportsRegistry>
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40 {
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41 private:
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42 typedef std::map<std::string, boost::shared_ptr<WebGLViewport> > Viewports;
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43
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44 double timeoutMS_;
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45 Viewports viewports_;
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46 long timeOutID_;
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47
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48 void LaunchTimer();
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50 void OnTimeout();
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51
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52 static void OnTimeoutCallback(void *userData);
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53
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54 public:
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55 explicit WebGLViewportsRegistry(double timeoutMS /* in milliseconds */);
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56
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57 ~WebGLViewportsRegistry();
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58
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59 boost::shared_ptr<WebGLViewport> Add(const std::string& canvasId);
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60
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61 void Remove(const std::string& canvasId);
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62
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63 void Clear();
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64
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65 class Accessor : public boost::noncopyable
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66 {
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67 private:
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68 WebGLViewportsRegistry& that_;
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69 std::unique_ptr<IViewport::ILock> lock_;
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71 public:
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72 Accessor(WebGLViewportsRegistry& that,
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73 const std::string& canvasId);
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74
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75 bool IsValid() const
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76 {
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77 return lock_.get() != NULL;
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78 }
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79
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80 IViewport::ILock& GetViewport() const;
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81 };
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85 static void FinalizeGlobalRegistry();
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86
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87 static void SetGlobalRegistryTimeout(double timeout);
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88
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89 static WebGLViewportsRegistry& GetGlobalRegistry();
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90 };
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91 }