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comparison 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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1229:b9f2a111c5b9 1232:a28861abf888
1 /**
2 * Stone of Orthanc
3 * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics
4 * Department, University Hospital of Liege, Belgium
5 * Copyright (C) 2017-2019 Osimis S.A., Belgium
6 *
7 * This program is free software: you can redistribute it and/or
8 * modify it under the terms of the GNU Affero General Public License
9 * as published by the Free Software Foundation, either version 3 of
10 * the License, or (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Affero General Public License for more details.
16 *
17 * You should have received a copy of the GNU Affero General Public License
18 * along with this program. If not, see <http://www.gnu.org/licenses/>.
19 **/
20
21
22 #pragma once
23
24 #include "WebGLViewport.h"
25
26 namespace OrthancStone
27 {
28 /**
29 * This singleton class must be used if many WebGL viewports are
30 * created by the higher-level application, implying possible loss
31 * of WebGL contexts. The object will run an infinite update loop
32 * that checks whether all the WebGL context are still valid (not
33 * lost). If some WebGL context is lost, it is automatically
34 * reinitialized by created a fresh HTML5 canvas.
35 **/
36 class WebGLViewportsRegistry : public boost::noncopyable
37 {
38 private:
39 typedef std::map<std::string, WebGLViewport*> Viewports;
40
41 unsigned int timeoutSeconds_;
42 Viewports viewports_;
43
44 void LaunchTimer();
45
46 void OnTimeout();
47
48 static void OnTimeoutCallback(void *userData);
49
50 public:
51 WebGLViewportsRegistry(unsigned int timeoutSeconds);
52
53 ~WebGLViewportsRegistry();
54
55 void Add(const std::string& canvasId);
56
57 void Remove(const std::string& canvasId);
58
59 class Accessor : public boost::noncopyable
60 {
61 private:
62 WebGLViewportsRegistry& that_;
63 std::auto_ptr<IViewport::ILock> lock_;
64
65 public:
66 Accessor(WebGLViewportsRegistry& that,
67 const std::string& canvasId);
68
69 bool IsValid() const
70 {
71 return lock_.get() != NULL;
72 }
73
74 IViewport::ILock& GetViewport() const;
75 };
76 };
77 }