Mercurial > hg > orthanc-stone
annotate Framework/Viewport/WebGLViewportsRegistry.cpp @ 1271:0ca50d275b9a broker
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author | Sebastien Jodogne <s.jodogne@gmail.com> |
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date | Fri, 31 Jan 2020 17:34:57 +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) 2017-2020 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 #include "WebGLViewportsRegistry.h" |
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23 |
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24 #include <Core/OrthancException.h> |
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25 |
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26 #include <boost/make_shared.hpp> |
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27 |
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28 namespace OrthancStone |
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29 { |
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30 void WebGLViewportsRegistry::LaunchTimer() |
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31 { |
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32 emscripten_set_timeout(OnTimeoutCallback, timeoutMS_, this); |
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33 } |
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34 |
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35 |
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36 void WebGLViewportsRegistry::OnTimeout() |
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37 { |
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38 for (Viewports::iterator it = viewports_.begin(); it != viewports_.end(); ++it) |
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39 { |
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40 if (it->second == NULL || |
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41 it->second->IsContextLost()) |
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42 { |
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43 LOG(INFO) << "WebGL context lost for canvas: " << it->first; |
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44 |
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45 // Try and duplicate the HTML5 canvas in the DOM |
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46 EM_ASM({ |
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47 var canvas = document.getElementById(UTF8ToString($0)); |
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48 if (canvas) { |
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49 var parent = canvas.parentElement; |
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50 if (parent) { |
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51 var cloned = canvas.cloneNode(true /* deep copy */); |
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52 parent.insertBefore(cloned, canvas); |
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53 parent.removeChild(canvas); |
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54 } |
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55 } |
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56 }, |
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57 it->first.c_str() // $0 = ID of the canvas |
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58 ); |
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59 |
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60 // At this point, the old canvas is removed from the DOM and |
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61 // replaced by a fresh one with the same ID: Recreate the |
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62 // WebGL context on the new canvas |
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63 boost::shared_ptr<WebGLViewport> viewport; |
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64 |
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65 { |
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66 std::auto_ptr<IViewport::ILock> lock(it->second->Lock()); |
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67 viewport = boost::make_shared<WebGLViewport>(it->first, lock->GetController().GetScene()); |
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68 } |
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69 |
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70 // Replace the old WebGL viewport by the new one |
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71 it->second = viewport; |
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72 |
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73 // Tag the fresh canvas as needing a repaint |
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74 { |
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75 std::auto_ptr<IViewport::ILock> lock(it->second->Lock()); |
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76 lock->Invalidate(); |
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77 } |
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78 } |
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79 } |
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80 |
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81 LaunchTimer(); |
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82 } |
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83 |
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84 |
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85 void WebGLViewportsRegistry::OnTimeoutCallback(void *userData) |
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86 { |
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87 WebGLViewportsRegistry& that = *reinterpret_cast<WebGLViewportsRegistry*>(userData); |
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88 that.OnTimeout(); |
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89 } |
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90 |
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91 |
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92 WebGLViewportsRegistry::WebGLViewportsRegistry(double timeoutMS) : |
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93 timeoutMS_(timeoutMS) |
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94 { |
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95 if (timeoutMS <= 0) |
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96 { |
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97 throw Orthanc::OrthancException(Orthanc::ErrorCode_ParameterOutOfRange); |
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98 } |
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99 |
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100 LaunchTimer(); |
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101 } |
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102 |
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103 |
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104 boost::shared_ptr<WebGLViewport> WebGLViewportsRegistry::Add(const std::string& canvasId) |
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105 { |
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106 if (viewports_.find(canvasId) != viewports_.end()) |
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107 { |
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108 LOG(ERROR) << "Canvas was already registered: " << canvasId; |
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109 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls); |
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110 } |
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111 else |
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112 { |
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113 boost::shared_ptr<WebGLViewport> viewport(new WebGLViewport(canvasId)); |
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114 viewports_[canvasId] = viewport; |
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115 return viewport; |
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116 } |
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117 } |
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118 |
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119 |
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120 void WebGLViewportsRegistry::Remove(const std::string& canvasId) |
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121 { |
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122 Viewports::iterator found = viewports_.find(canvasId); |
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123 |
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124 if (found == viewports_.end()) |
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125 { |
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126 LOG(ERROR) << "Cannot remove unregistered canvas: " << canvasId; |
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127 } |
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128 else |
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129 { |
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130 viewports_.erase(found); |
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131 } |
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132 } |
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133 |
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134 |
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135 void WebGLViewportsRegistry::Clear() |
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136 { |
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137 viewports_.clear(); |
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138 } |
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139 |
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140 |
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141 WebGLViewportsRegistry::Accessor::Accessor(WebGLViewportsRegistry& that, |
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142 const std::string& canvasId) : |
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143 that_(that) |
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144 { |
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145 Viewports::iterator viewport = that.viewports_.find(canvasId); |
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146 if (viewport != that.viewports_.end() && |
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147 viewport->second != NULL) |
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148 { |
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149 lock_.reset(viewport->second->Lock()); |
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150 } |
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151 } |
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152 |
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153 |
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154 IViewport::ILock& WebGLViewportsRegistry::Accessor::GetViewport() const |
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155 { |
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156 if (IsValid()) |
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157 { |
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158 return *lock_; |
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159 } |
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160 else |
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161 { |
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162 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls); |
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163 } |
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164 } |
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165 } |