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annotate Framework/Viewport/WebGLViewportsRegistry.h @ 1232:a28861abf888 broker

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viewports for WebAssembly
author Sebastien Jodogne <s.jodogne@gmail.com>
date Mon, 09 Dec 2019 17:46:33 +0100
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children e71ee3e88448
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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) 2017-2019 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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25
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26 namespace OrthancStone
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27 {
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28 /**
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29 * This singleton class must be used if many WebGL viewports are
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30 * created by the higher-level application, implying possible loss
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31 * of WebGL contexts. The object will run an infinite update loop
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32 * that checks whether all the WebGL context are still valid (not
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33 * lost). If some WebGL context is lost, it is automatically
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34 * reinitialized by created a fresh HTML5 canvas.
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35 **/
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36 class WebGLViewportsRegistry : public boost::noncopyable
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37 {
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38 private:
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39 typedef std::map<std::string, WebGLViewport*> Viewports;
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40
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41 unsigned int timeoutSeconds_;
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42 Viewports viewports_;
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43
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44 void LaunchTimer();
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45
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46 void OnTimeout();
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47
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48 static void OnTimeoutCallback(void *userData);
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49
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50 public:
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51 WebGLViewportsRegistry(unsigned int timeoutSeconds);
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52
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53 ~WebGLViewportsRegistry();
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54
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55 void Add(const std::string& canvasId);
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56
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57 void Remove(const std::string& canvasId);
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58
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59 class Accessor : public boost::noncopyable
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60 {
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61 private:
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62 WebGLViewportsRegistry& that_;
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63 std::auto_ptr<IViewport::ILock> lock_;
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64
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65 public:
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66 Accessor(WebGLViewportsRegistry& that,
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67 const std::string& canvasId);
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68
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69 bool IsValid() const
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70 {
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71 return lock_.get() != NULL;
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72 }
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73
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74 IViewport::ILock& GetViewport() const;
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75 };
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76 };
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77 }