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comparison OrthancStone/Sources/Platforms/WebAssembly/WebGLViewportsRegistry.h @ 1899:917500c46fe0

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moved the Platform folder from the Applications folder to the Stone library itself
author Alain Mazy <am@osimis.io>
date Sat, 29 Jan 2022 12:47:32 +0100
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children 07964689cb0b
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1898:a5e54bd87b25 1899:917500c46fe0
1 /**
2 * Stone of Orthanc
3 * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics
4 * Department, University Hospital of Liege, Belgium
5 * Copyright (C) 2017-2022 Osimis S.A., Belgium
6 * Copyright (C) 2021-2022 Sebastien Jodogne, ICTEAM UCLouvain, Belgium
7 *
8 * This program is free software: you can redistribute it and/or
9 * modify it under the terms of the GNU Lesser General Public License
10 * as published by the Free Software Foundation, either version 3 of
11 * the License, or (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful, but
14 * WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Lesser General Public License for more details.
17 *
18 * You should have received a copy of the GNU Lesser General Public
19 * License along with this program. If not, see
20 * <http://www.gnu.org/licenses/>.
21 **/
22
23
24 #pragma once
25
26 #include "WebGLViewport.h"
27
28 #include <boost/enable_shared_from_this.hpp>
29
30 namespace OrthancStone
31 {
32 /**
33 * This singleton class must be used if many WebGL viewports are
34 * created by the higher-level application, implying possible loss
35 * of WebGL contexts. The object will run an infinite update loop
36 * that checks whether all the WebGL context are still valid (not
37 * lost). If some WebGL context is lost, it is automatically
38 * reinitialized by created a fresh HTML5 canvas.
39 **/
40 class WebGLViewportsRegistry : public boost::noncopyable,
41 public boost::enable_shared_from_this<WebGLViewportsRegistry>
42 {
43 private:
44 typedef std::map<std::string, boost::shared_ptr<WebGLViewport> > Viewports;
45
46 double timeoutMS_;
47 Viewports viewports_;
48 long timeOutID_;
49
50 void LaunchTimer();
51
52 void OnTimeout();
53
54 static void OnTimeoutCallback(void *userData);
55
56 public:
57 explicit WebGLViewportsRegistry(double timeoutMS /* in milliseconds */);
58
59 ~WebGLViewportsRegistry();
60
61 boost::shared_ptr<WebGLViewport> Add(const std::string& canvasId);
62
63 void Remove(const std::string& canvasId);
64
65 void Clear();
66
67 class Accessor : public boost::noncopyable
68 {
69 private:
70 WebGLViewportsRegistry& that_;
71 std::unique_ptr<IViewport::ILock> lock_;
72
73 public:
74 Accessor(WebGLViewportsRegistry& that,
75 const std::string& canvasId);
76
77 bool IsValid() const
78 {
79 return lock_.get() != NULL;
80 }
81
82 IViewport::ILock& GetViewport() const;
83 };
84
85
86
87 static void FinalizeGlobalRegistry();
88
89 static void SetGlobalRegistryTimeout(double timeout);
90
91 static WebGLViewportsRegistry& GetGlobalRegistry();
92 };
93 }