Mercurial > hg > orthanc-stone

annotate Framework/Viewport/WebGLViewportsRegistry.cpp @ 1235:e71ee3e88448 broker

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WebGLViewportsRegistry in milliseconds, and Clear()
author Sebastien Jodogne <s.jodogne@gmail.com>
date Mon, 09 Dec 2019 20:25:22 +0100
parents a28861abf888
children b9b5d4378874
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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 #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 namespace OrthancStone
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27 {
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28 void WebGLViewportsRegistry::LaunchTimer()
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29 {
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30 emscripten_set_timeout(OnTimeoutCallback, timeoutMS_, this);
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31 }
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33
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34 void WebGLViewportsRegistry::OnTimeout()
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35 {
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36 for (Viewports::iterator it = viewports_.begin(); it != viewports_.end(); ++it)
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37 {
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38 if (it->second == NULL ||
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39 it->second->IsContextLost())
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40 {
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41 LOG(INFO) << "WebGL context lost for canvas: " << it->first;
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42
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43 // Try and duplicate the HTML5 canvas in the DOM
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44 EM_ASM({
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45 var canvas = document.getElementById(UTF8ToString($0));
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46 if (canvas) {
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47 var parent = canvas.parentElement;
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48 if (parent) {
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49 var cloned = canvas.cloneNode(true /* deep copy */);
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50 parent.insertBefore(cloned, canvas);
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51 parent.removeChild(canvas);
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52 }
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53 }
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54 },
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55 it->first.c_str() // $0 = ID of the canvas
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56 );
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57
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58 // At this point, the old canvas is removed from the DOM and
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59 // replaced by a fresh one with the same ID: Recreate the
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60 // WebGL context on the new canvas
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61 std::auto_ptr<WebGLViewport> viewport;
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62
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63 {
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64 std::auto_ptr<IViewport::ILock> lock(it->second->Lock());
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65 viewport.reset(new WebGLViewport(it->first, lock->GetController().GetScene()));
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66 }
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67
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68 // Replace the old WebGL viewport by the new one
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69 delete it->second;
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70 it->second = viewport.release();
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71
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72 // Tag the fresh canvas as needing a repaint
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73 {
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74 std::auto_ptr<IViewport::ILock> lock(it->second->Lock());
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75 lock->Invalidate();
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76 }
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77 }
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78 }
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79
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80 LaunchTimer();
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81 }
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82
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83
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84 void WebGLViewportsRegistry::OnTimeoutCallback(void *userData)
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85 {
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86 WebGLViewportsRegistry& that = *reinterpret_cast<WebGLViewportsRegistry*>(userData);
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87 that.OnTimeout();
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88 }
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89
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90
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91 WebGLViewportsRegistry::WebGLViewportsRegistry(double timeoutMS) :
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92 timeoutMS_(timeoutMS)
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93 {
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94 if (timeoutMS <= 0)
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95 {
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96 throw Orthanc::OrthancException(Orthanc::ErrorCode_ParameterOutOfRange);
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97 }
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98
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99 LaunchTimer();
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100 }
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101
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102
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103 void WebGLViewportsRegistry::Add(const std::string& canvasId)
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104 {
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105 if (viewports_.find(canvasId) != viewports_.end())
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106 {
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107 LOG(ERROR) << "Canvas was already registered: " << canvasId;
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108 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls);
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109 }
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110 else
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111 {
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112 viewports_[canvasId] = new WebGLViewport(canvasId);
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113 }
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114 }
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115
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116
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117 void WebGLViewportsRegistry::Remove(const std::string& canvasId)
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118 {
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119 Viewports::iterator found = viewports_.find(canvasId);
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120
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121 if (found == viewports_.end())
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122 {
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123 LOG(ERROR) << "Cannot remove unregistered canvas: " << canvasId;
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124 }
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125 else
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126 {
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127 if (found->second != NULL)
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128 {
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129 delete found->second;
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130 }
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131
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132 viewports_.erase(found);
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133 }
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134 }
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135
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136
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137 void WebGLViewportsRegistry::Clear()
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138 {
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139 for (Viewports::iterator it = viewports_.begin(); it != viewports_.end(); ++it)
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140 {
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141 if (it->second != NULL)
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142 {
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143 delete it->second;
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144 }
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145 }
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146
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147 viewports_.clear();
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148 }
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149
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150
1232
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151 WebGLViewportsRegistry::Accessor::Accessor(WebGLViewportsRegistry& that,
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152 const std::string& canvasId) :
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153 that_(that)
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154 {
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155 Viewports::iterator viewport = that.viewports_.find(canvasId);
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156 if (viewport != that.viewports_.end() &&
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157 viewport->second != NULL)
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158 {
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159 lock_.reset(viewport->second->Lock());
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160 }
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161 }
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162
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163
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164 IViewport::ILock& WebGLViewportsRegistry::Accessor::GetViewport() const
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165 {
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166 if (IsValid())
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167 {
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168 return *lock_;
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169 }
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170 else
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171 {
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172 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls);
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173 }
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174 }
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175 }