Mercurial > hg > orthanc-stone
annotate OrthancStone/Sources/Platforms/WebAssembly/WebGLViewportsRegistry.cpp @ 2039:e0906b7c67b9 deep-learning
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author | Sebastien Jodogne <s.jodogne@gmail.com> |
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date | Sat, 28 Jan 2023 15:48:01 +0100 |
parents | 184b0aeae1af |
children | 07964689cb0b |
rev | line source |
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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) 2017-2022 Osimis S.A., Belgium |
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6 * Copyright (C) 2021-2022 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 Lesser 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 * Lesser 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 Lesser General Public |
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19 * License along with this program. If not, see |
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20 * <http://www.gnu.org/licenses/>. |
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21 **/ |
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22 |
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23 |
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24 #include "WebGLViewportsRegistry.h" |
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25 |
1901 | 26 #include "../../Scene2DViewport/ViewportController.h" |
27 #include "../../Toolbox/GenericToolbox.h" | |
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28 |
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29 #include <OrthancException.h> |
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30 |
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31 #include <boost/make_shared.hpp> |
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32 |
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33 |
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34 static double viewportsTimeout_ = 1000; |
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35 static std::unique_ptr<OrthancStone::WebGLViewportsRegistry> globalRegistry_; |
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36 |
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37 |
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38 namespace OrthancStone |
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39 { |
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40 void WebGLViewportsRegistry::LaunchTimer() |
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41 { |
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42 timeOutID_ = emscripten_set_timeout( |
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43 OnTimeoutCallback, |
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44 timeoutMS_, |
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45 reinterpret_cast<void*>(this)); |
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46 } |
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47 |
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48 void WebGLViewportsRegistry::OnTimeout() |
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49 { |
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50 for (Viewports::iterator it = viewports_.begin(); |
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51 it != viewports_.end(); |
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52 ++it) |
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53 { |
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54 if (it->second == NULL || |
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55 it->second->IsContextLost()) |
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56 { |
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57 LOG(INFO) << "WebGL context lost for canvas: " << it->first; |
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58 |
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59 // Try and duplicate the HTML5 canvas in the DOM |
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60 EM_ASM({ |
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61 var canvas = document.getElementById(UTF8ToString($0)); |
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62 if (canvas) { |
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63 var parent = canvas.parentElement; |
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64 if (parent) { |
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65 var cloned = canvas.cloneNode(true /* deep copy */); |
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66 parent.insertBefore(cloned, canvas); |
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67 parent.removeChild(canvas); |
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68 } |
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69 } |
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70 }, |
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71 it->first.c_str() // $0 = ID of the canvas |
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72 ); |
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73 |
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74 // At this point, the old canvas is removed from the DOM and |
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75 // replaced by a fresh one with the same ID: Recreate the |
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76 // WebGL context on the new canvas |
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77 boost::shared_ptr<WebGLViewport> viewport; |
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78 |
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79 // we need to steal the properties from the old viewport |
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80 // and set them to the new viewport |
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81 { |
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82 std::unique_ptr<IViewport::ILock> lock(it->second->Lock()); |
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83 |
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84 // TODO: remove ViewportController |
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85 Scene2D* scene = lock->GetController().ReleaseScene(); |
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86 viewport = WebGLViewport::Create(it->first); |
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87 |
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88 { |
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89 std::unique_ptr<IViewport::ILock> newLock(viewport->Lock()); |
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90 newLock->GetController().AcquireScene(scene); |
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91 } |
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92 } |
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93 |
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94 // Replace the old WebGL viewport by the new one |
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95 it->second = viewport; |
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96 |
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97 // Tag the fresh canvas as needing a repaint |
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98 { |
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99 std::unique_ptr<IViewport::ILock> lock(it->second->Lock()); |
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100 lock->Invalidate(); |
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101 } |
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102 } |
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103 } |
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104 |
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105 LaunchTimer(); |
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106 } |
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107 |
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108 void WebGLViewportsRegistry::OnTimeoutCallback(void *userData) |
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109 { |
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110 // This object dies with the process or tab. |
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111 WebGLViewportsRegistry* that = |
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112 reinterpret_cast<WebGLViewportsRegistry*>(userData); |
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113 that->OnTimeout(); |
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114 } |
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115 |
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116 WebGLViewportsRegistry::WebGLViewportsRegistry(double timeoutMS) : |
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117 timeoutMS_(timeoutMS), |
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118 timeOutID_(0) |
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119 { |
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120 if (timeoutMS <= 0) |
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121 { |
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122 throw Orthanc::OrthancException(Orthanc::ErrorCode_ParameterOutOfRange); |
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123 } |
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124 |
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125 LaunchTimer(); |
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126 } |
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127 |
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128 WebGLViewportsRegistry::~WebGLViewportsRegistry() |
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129 { |
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130 emscripten_clear_timeout(timeOutID_); |
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131 Clear(); |
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132 } |
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133 |
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134 boost::shared_ptr<WebGLViewport> WebGLViewportsRegistry::Add( |
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135 const std::string& canvasId) |
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136 { |
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137 if (viewports_.find(canvasId) != viewports_.end()) |
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138 { |
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139 LOG(ERROR) << "Canvas was already registered: " << canvasId; |
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140 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls); |
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141 } |
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142 else |
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143 { |
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144 boost::shared_ptr<WebGLViewport> viewport = |
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145 WebGLViewport::Create(canvasId); |
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146 viewports_[canvasId] = viewport; |
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147 return viewport; |
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148 } |
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149 } |
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150 |
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151 void WebGLViewportsRegistry::Remove(const std::string& canvasId) |
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152 { |
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153 Viewports::iterator found = viewports_.find(canvasId); |
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154 |
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155 if (found == viewports_.end()) |
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156 { |
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157 LOG(ERROR) << "Cannot remove unregistered canvas: " << canvasId; |
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158 } |
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159 else |
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160 { |
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161 viewports_.erase(found); |
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162 } |
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163 } |
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164 |
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165 void WebGLViewportsRegistry::Clear() |
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166 { |
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167 viewports_.clear(); |
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168 } |
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169 |
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170 WebGLViewportsRegistry::Accessor::Accessor(WebGLViewportsRegistry& that, |
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171 const std::string& canvasId) : |
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172 that_(that) |
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173 { |
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174 Viewports::iterator viewport = that.viewports_.find(canvasId); |
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175 if (viewport != that.viewports_.end() && |
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176 viewport->second != NULL) |
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177 { |
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178 lock_.reset(viewport->second->Lock()); |
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179 } |
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180 } |
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181 |
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182 IViewport::ILock& WebGLViewportsRegistry::Accessor::GetViewport() const |
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183 { |
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184 if (IsValid()) |
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185 { |
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186 return *lock_; |
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187 } |
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188 else |
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189 { |
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190 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls); |
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191 } |
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192 } |
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193 |
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194 |
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195 void WebGLViewportsRegistry::FinalizeGlobalRegistry() |
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196 { |
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197 globalRegistry_.reset(); |
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198 } |
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199 |
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200 |
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201 void WebGLViewportsRegistry::SetGlobalRegistryTimeout(double timeout) |
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202 { |
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203 if (globalRegistry_.get()) |
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204 { |
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205 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls); |
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206 } |
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207 else |
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208 { |
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209 viewportsTimeout_ = timeout; |
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210 } |
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211 } |
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212 |
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213 |
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214 WebGLViewportsRegistry& WebGLViewportsRegistry::GetGlobalRegistry() |
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215 { |
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216 if (globalRegistry_.get() == NULL) |
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217 { |
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218 globalRegistry_.reset(new WebGLViewportsRegistry(viewportsTimeout_)); |
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219 } |
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220 |
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221 return *globalRegistry_; |
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222 } |
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223 } |