Mercurial > hg > orthanc-stone

annotate OrthancStone/Sources/Viewport/WebGLViewportsRegistry.cpp @ 1582:cdd1932c530c

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fix cppcheck
author Sebastien Jodogne <s.jodogne@gmail.com>
date Fri, 16 Oct 2020 17:34:53 +0200
parents 314b6dc507d9
children
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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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24 #include "../Toolbox/GenericToolbox.h"
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25 #include "../Scene2DViewport/ViewportController.h"
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26
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27 #include <OrthancException.h>
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28
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29 #include <boost/make_shared.hpp>
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30
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31 namespace OrthancStone
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32 {
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33 void WebGLViewportsRegistry::LaunchTimer()
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34 {
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35 timeOutID_ = emscripten_set_timeout(
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36 OnTimeoutCallback,
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37 timeoutMS_,
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38 reinterpret_cast<void*>(this));
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39 }
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40
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41 void WebGLViewportsRegistry::OnTimeout()
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42 {
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43 for (Viewports::iterator it = viewports_.begin();
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44 it != viewports_.end();
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45 ++it)
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46 {
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47 if (it->second == NULL ||
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48 it->second->IsContextLost())
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49 {
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50 LOG(INFO) << "WebGL context lost for canvas: " << it->first;
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51
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52 // Try and duplicate the HTML5 canvas in the DOM
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53 EM_ASM({
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54 var canvas = document.getElementById(UTF8ToString($0));
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55 if (canvas) {
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56 var parent = canvas.parentElement;
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57 if (parent) {
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58 var cloned = canvas.cloneNode(true /* deep copy */);
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59 parent.insertBefore(cloned, canvas);
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60 parent.removeChild(canvas);
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61 }
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62 }
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63 },
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64 it->first.c_str() // $0 = ID of the canvas
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65 );
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66
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67 // At this point, the old canvas is removed from the DOM and
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68 // replaced by a fresh one with the same ID: Recreate the
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69 // WebGL context on the new canvas
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70 boost::shared_ptr<WebGLViewport> viewport;
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71
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72 // we need to steal the properties from the old viewport
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73 // and set them to the new viewport
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74 {
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75 std::unique_ptr<IViewport::ILock> lock(it->second->Lock());
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76
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77 // TODO: remove ViewportController
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78 Scene2D* scene = lock->GetController().ReleaseScene();
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79 viewport = WebGLViewport::Create(it->first);
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80
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81 {
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82 std::unique_ptr<IViewport::ILock> newLock(viewport->Lock());
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83 newLock->GetController().AcquireScene(scene);
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84 }
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85 }
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86
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87 // Replace the old WebGL viewport by the new one
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88 it->second = viewport;
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89
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90 // Tag the fresh canvas as needing a repaint
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91 {
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92 std::unique_ptr<IViewport::ILock> lock(it->second->Lock());
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93 lock->Invalidate();
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94 }
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95 }
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96 }
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97
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98 LaunchTimer();
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99 }
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100
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101 void WebGLViewportsRegistry::OnTimeoutCallback(void *userData)
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102 {
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103 // This object dies with the process or tab.
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104 WebGLViewportsRegistry* that =
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105 reinterpret_cast<WebGLViewportsRegistry*>(userData);
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106 that->OnTimeout();
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107 }
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108
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109 WebGLViewportsRegistry::WebGLViewportsRegistry(double timeoutMS) :
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110 timeoutMS_(timeoutMS),
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111 timeOutID_(0)
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112 {
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113 if (timeoutMS <= 0)
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114 {
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115 throw Orthanc::OrthancException(Orthanc::ErrorCode_ParameterOutOfRange);
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116 }
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117
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118 LaunchTimer();
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119 }
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120
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121 WebGLViewportsRegistry::~WebGLViewportsRegistry()
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122 {
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123 emscripten_clear_timeout(timeOutID_);
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124 Clear();
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125 }
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126
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127 boost::shared_ptr<WebGLViewport> WebGLViewportsRegistry::Add(
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128 const std::string& canvasId)
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129 {
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130 if (viewports_.find(canvasId) != viewports_.end())
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131 {
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132 LOG(ERROR) << "Canvas was already registered: " << canvasId;
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133 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls);
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134 }
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135 else
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136 {
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137 boost::shared_ptr<WebGLViewport> viewport =
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138 WebGLViewport::Create(canvasId);
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139 viewports_[canvasId] = viewport;
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140 return viewport;
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141 }
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142 }
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143
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144 void WebGLViewportsRegistry::Remove(const std::string& canvasId)
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145 {
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146 Viewports::iterator found = viewports_.find(canvasId);
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147
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148 if (found == viewports_.end())
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149 {
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150 LOG(ERROR) << "Cannot remove unregistered canvas: " << canvasId;
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151 }
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152 else
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153 {
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154 viewports_.erase(found);
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155 }
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156 }
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157
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158 void WebGLViewportsRegistry::Clear()
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159 {
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160 viewports_.clear();
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161 }
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162
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163 WebGLViewportsRegistry::Accessor::Accessor(WebGLViewportsRegistry& that,
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164 const std::string& canvasId) :
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165 that_(that)
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166 {
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167 Viewports::iterator viewport = that.viewports_.find(canvasId);
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168 if (viewport != that.viewports_.end() &&
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169 viewport->second != NULL)
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170 {
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171 lock_.reset(viewport->second->Lock());
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172 }
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173 }
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174
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175 IViewport::ILock& WebGLViewportsRegistry::Accessor::GetViewport() const
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176 {
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177 if (IsValid())
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178 {
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179 return *lock_;
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180 }
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181 else
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182 {
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183 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls);
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184 }
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185 }
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186 }