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annotate Applications/Platforms/WebAssembly/WebGLViewportsRegistry.h @ 1870:3889ae96d2e9

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added copyright UCLouvain
author Sebastien Jodogne <s.jodogne@gmail.com>
date Tue, 11 Jan 2022 11:04:09 +0100
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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 * Copyright (C) 2021-2021 Sebastien Jodogne, ICTEAM UCLouvain, Belgium
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7 *
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8 * This program is free software: you can redistribute it and/or
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9 * modify it under the terms of the GNU Affero General Public License
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10 * as published by the Free Software Foundation, either version 3 of
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11 * the License, or (at your option) any later version.
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12 *
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13 * This program is distributed in the hope that it will be useful, but
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14 * WITHOUT ANY WARRANTY; without even the implied warranty of
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15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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16 * Affero General Public License for more details.
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17 *
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18 * You should have received a copy of the GNU Affero General Public License
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19 * along with this program. If not, see <http://www.gnu.org/licenses/>.
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20 **/
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21
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22
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23 #pragma once
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24
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25 #include "WebGLViewport.h"
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27 #include <boost/enable_shared_from_this.hpp>
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28
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29 namespace OrthancStone
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30 {
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31 /**
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32 * This singleton class must be used if many WebGL viewports are
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33 * created by the higher-level application, implying possible loss
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34 * of WebGL contexts. The object will run an infinite update loop
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35 * that checks whether all the WebGL context are still valid (not
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36 * lost). If some WebGL context is lost, it is automatically
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37 * reinitialized by created a fresh HTML5 canvas.
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38 **/
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39 class WebGLViewportsRegistry : public boost::noncopyable,
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40 public boost::enable_shared_from_this<WebGLViewportsRegistry>
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41 {
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42 private:
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43 typedef std::map<std::string, boost::shared_ptr<WebGLViewport> > Viewports;
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44
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45 double timeoutMS_;
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46 Viewports viewports_;
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47 long timeOutID_;
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49 void LaunchTimer();
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51 void OnTimeout();
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52
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53 static void OnTimeoutCallback(void *userData);
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54
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55 public:
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56 explicit WebGLViewportsRegistry(double timeoutMS /* in milliseconds */);
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58 ~WebGLViewportsRegistry();
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59
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60 boost::shared_ptr<WebGLViewport> Add(const std::string& canvasId);
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61
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62 void Remove(const std::string& canvasId);
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63
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64 void Clear();
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65
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66 class Accessor : public boost::noncopyable
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67 {
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68 private:
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69 WebGLViewportsRegistry& that_;
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70 std::unique_ptr<IViewport::ILock> lock_;
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72 public:
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73 Accessor(WebGLViewportsRegistry& that,
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74 const std::string& canvasId);
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75
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76 bool IsValid() const
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77 {
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78 return lock_.get() != NULL;
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79 }
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80
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81 IViewport::ILock& GetViewport() const;
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82 };
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86 static void FinalizeGlobalRegistry();
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87
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88 static void SetGlobalRegistryTimeout(double timeout);
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89
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90 static WebGLViewportsRegistry& GetGlobalRegistry();
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91 };
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92 }