Mercurial > hg > orthanc-stone

annotate OrthancStone/Sources/Platforms/WebAssembly/WebAssemblyViewport.cpp @ 2077:07964689cb0b

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upgrade to year 2023
author Sebastien Jodogne <s.jodogne@gmail.com>
date Wed, 12 Jul 2023 21:20:22 +0200
parents bd527bbc34df
children c23eef785569
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1899
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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) 2017-2023 Osimis S.A., Belgium
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6 * Copyright (C) 2021-2023 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 #if defined(ORTHANC_BUILDING_STONE_LIBRARY) && ORTHANC_BUILDING_STONE_LIBRARY == 1
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25 # include "WebAssemblyViewport.h"
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26 # include "../../Scene2DViewport/ViewportController.h"
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27 # include "../../Toolbox/GenericToolbox.h"
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28 # include "../../Viewport/DefaultViewportInteractor.h"
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29 #else
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30 // This is the case when using the WebAssembly side module, and this
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31 // source file must be compiled within the WebAssembly main module
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32 # include <Viewport/WebAssemblyViewport.h>
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33 # include <Toolbox/GenericToolbox.h>
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34 # include <Scene2DViewport/ViewportController.h>
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35 # include <Viewport/DefaultViewportInteractor.h>
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36 #endif
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37
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38
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39 #include <OrthancException.h>
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40
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41 #include <boost/make_shared.hpp>
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42 #include <boost/enable_shared_from_this.hpp>
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43 #include <boost/math/special_functions/round.hpp>
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44
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45 namespace OrthancStone
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46 {
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47 static void ConvertMouseEvent(PointerEvent& target,
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48 const EmscriptenMouseEvent& source,
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49 const ICompositor& compositor)
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50 {
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51 int x = static_cast<int>(source.targetX);
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52 int y = static_cast<int>(source.targetY);
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53
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54 switch (source.button)
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55 {
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56 case 0:
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57 target.SetMouseButton(MouseButton_Left);
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58 break;
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59
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60 case 1:
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61 target.SetMouseButton(MouseButton_Middle);
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62 break;
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63
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64 case 2:
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65 target.SetMouseButton(MouseButton_Right);
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66 break;
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67
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68 default:
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69 target.SetMouseButton(MouseButton_None);
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70 break;
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71 }
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72
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73 target.AddPosition(compositor.GetPixelCenterCoordinates(x, y));
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74 target.SetAltModifier(source.altKey);
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75 target.SetControlModifier(source.ctrlKey);
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76 target.SetShiftModifier(source.shiftKey);
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77 }
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78
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79
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80 class WebAssemblyViewport::WasmLock : public ILock
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81 {
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82 private:
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83 WebAssemblyViewport& that_;
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84
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85 public:
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86 WasmLock(WebAssemblyViewport& that) :
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87 that_(that)
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88 {
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89 }
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90
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91 virtual bool HasCompositor() const ORTHANC_OVERRIDE
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92 {
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93 return that_.compositor_.get() != NULL;
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94 }
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95
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96 virtual ICompositor& GetCompositor() ORTHANC_OVERRIDE
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97 {
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98 if (that_.compositor_.get() == NULL)
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99 {
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100 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls);
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101 }
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102 else
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103 {
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104 return *that_.compositor_;
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105 }
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106 }
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107
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108 virtual ViewportController& GetController() ORTHANC_OVERRIDE
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109 {
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110 assert(that_.controller_);
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111 return *that_.controller_;
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112 }
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113
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114 virtual void Invalidate() ORTHANC_OVERRIDE
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115 {
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116 that_.Invalidate();
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117 }
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118
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119 virtual void RefreshCanvasSize() ORTHANC_OVERRIDE
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120 {
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121 that_.RefreshCanvasSize();
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122 }
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123 };
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124
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125 EM_BOOL WebAssemblyViewport::OnRequestAnimationFrame(double time, void *userData)
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126 {
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127 LOG(TRACE) << __func__;
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128
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129 WebAssemblyViewport* that =
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130 WebAssemblyViewport::DereferenceObjectCookie(userData);
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131
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132 if (that != NULL)
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133 {
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134 if (that->compositor_.get() != NULL &&
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135 that->controller_ /* should always be true */)
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136 {
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137 that->Paint(*that->compositor_, *that->controller_);
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138 }
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139 }
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140 else
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141 {
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142 LOG(TRACE) << "WebAssemblyViewport::OnRequestAnimationFrame: the " <<
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143 "WebAssemblyViewport is deleted and Paint will not be called.";
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144 }
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145 WebAssemblyViewport::ReleaseObjectCookie(userData);
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146 LOG(TRACE) << "Exiting: " << __func__;
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147 return true;
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148 }
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149
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150 EM_BOOL WebAssemblyViewport::OnResize(int eventType, const EmscriptenUiEvent *uiEvent, void *userData)
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151 {
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152 LOG(TRACE) << __func__;
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153 WebAssemblyViewport* that = reinterpret_cast<WebAssemblyViewport*>(userData);
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154
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155 if (that->compositor_.get() != NULL)
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156 {
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157 that->RefreshCanvasSize();
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158 that->Invalidate();
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159 }
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160
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161 LOG(TRACE) << "Exiting: " << __func__;
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162 return true;
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163 }
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164
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165
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166 EM_BOOL WebAssemblyViewport::OnMouseDown(int eventType, const EmscriptenMouseEvent *mouseEvent, void *userData)
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167 {
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168 WebAssemblyViewport* that = reinterpret_cast<WebAssemblyViewport*>(userData);
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169
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170 LOG(TRACE) << "mouse down: " << that->GetCanvasCssSelector();
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171
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172 if (that->compositor_.get() != NULL &&
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173 that->interactor_.get() != NULL)
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174 {
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175 PointerEvent pointer;
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176 ConvertMouseEvent(pointer, *mouseEvent, *that->compositor_);
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177
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178 that->controller_->HandleMousePress(*that->interactor_, pointer,
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179 that->compositor_->GetCanvasWidth(),
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180 that->compositor_->GetCanvasHeight());
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181 that->Invalidate();
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182 }
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183
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184 LOG(TRACE) << "Exiting: " << __func__;
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185 return true;
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186 }
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187
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188
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189 EM_BOOL WebAssemblyViewport::OnMouseMove(int eventType, const EmscriptenMouseEvent *mouseEvent, void *userData)
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190 {
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191 WebAssemblyViewport* that = reinterpret_cast<WebAssemblyViewport*>(userData);
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192
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193 if (that->compositor_.get() != NULL)
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194 {
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195 if (that->controller_->HasActiveTracker())
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196 {
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197 PointerEvent pointer;
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198 ConvertMouseEvent(pointer, *mouseEvent, *that->compositor_);
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199
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200 if (that->controller_->HandleMouseMove(pointer))
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201 {
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202 that->Invalidate();
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203 }
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204 }
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205 else if (that->interactor_.get() != NULL &&
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206 that->interactor_->HasMouseHover())
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207 {
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208 // New in Stone Web viewer 2.0
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209 PointerEvent pointer;
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210 ConvertMouseEvent(pointer, *mouseEvent, *that->compositor_);
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211 that->interactor_->HandleMouseHover(*that, pointer);
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212 }
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213 }
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214
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215 LOG(TRACE) << "Exiting: " << __func__;
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216 return true;
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217 }
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218
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219 EM_BOOL WebAssemblyViewport::OnMouseUp(int eventType, const EmscriptenMouseEvent *mouseEvent, void *userData)
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220 {
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221 LOG(TRACE) << __func__;
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222 WebAssemblyViewport* that = reinterpret_cast<WebAssemblyViewport*>(userData);
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223
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224 if (that->compositor_.get() != NULL)
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225 {
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226 PointerEvent pointer;
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227 ConvertMouseEvent(pointer, *mouseEvent, *that->compositor_);
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228 that->controller_->HandleMouseRelease(pointer);
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229 that->Invalidate();
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230 }
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231
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232 LOG(TRACE) << "Exiting: " << __func__;
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233 return true;
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234 }
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235
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236 void* WebAssemblyViewport::CreateObjectCookie()
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237 {
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238 boost::weak_ptr<WebAssemblyViewport>* weakThisPtr =
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239 new boost::weak_ptr<WebAssemblyViewport>();
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240
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241 *weakThisPtr = shared_from_this();
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242
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243 void* cookie = reinterpret_cast<void*>(weakThisPtr);
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244
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245 LOG(TRACE) << "WebAssemblyViewport::CreateObjectCookie() => cookie = "
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246 << cookie << "\n";
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247
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248 return cookie;
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249 }
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250
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251 WebAssemblyViewport* WebAssemblyViewport::DereferenceObjectCookie(void* cookie)
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252 {
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253 LOG(TRACE) << "WebAssemblyViewport::DereferenceObjectCookie(cookie = "
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254 << cookie << ")\n";
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255
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256 boost::weak_ptr<WebAssemblyViewport>* weakThisPtr =
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257 reinterpret_cast<boost::weak_ptr<WebAssemblyViewport>*>(cookie);
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258
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259 boost::shared_ptr<WebAssemblyViewport> sharedThis = weakThisPtr->lock();
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260
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261 return sharedThis.get();
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262 }
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263
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264 void WebAssemblyViewport::ReleaseObjectCookie(void* cookie)
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265 {
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266 LOG(TRACE) << "WebAssemblyViewport::ReleaseObjectCookie(cookie = "
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267 << cookie << ")\n";
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268
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269 boost::weak_ptr<WebAssemblyViewport>* weakThisPtr =
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270 reinterpret_cast<boost::weak_ptr<WebAssemblyViewport>*>(cookie);
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271
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272 delete weakThisPtr;
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273 }
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274
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275 void WebAssemblyViewport::Invalidate()
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276 {
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277 LOG(TRACE) << "WebAssemblyViewport::Invalidate()\n";
1916
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parents: 1901
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278
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parents: 1901
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279 #if 1
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280 emscripten_request_animation_frame(OnRequestAnimationFrame, CreateObjectCookie());
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parents: 1901
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281 #else
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282 animationFrameCallbackIds_.push_back(
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283 emscripten_request_animation_frame(OnRequestAnimationFrame, CreateObjectCookie()));
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284 #endif
1899
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285 }
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286
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287 void WebAssemblyViewport::FitForPrint()
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288 {
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parents:
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289 if (compositor_.get() != NULL &&
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290 controller_ /* should always be true */)
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291 {
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292 RefreshCanvasSize();
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293 compositor_->FitContent(controller_->GetScene());
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294
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295 void* cookie = CreateObjectCookie();
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296 OnRequestAnimationFrame(0, cookie); // Mandatory to work with Firefox
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297 }
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298 }
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299
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300 void WebAssemblyViewport::AcquireCompositor(ICompositor* compositor /* takes ownership */)
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301 {
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302 if (compositor == NULL)
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303 {
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304 throw Orthanc::OrthancException(Orthanc::ErrorCode_NullPointer);
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305 }
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306 else
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307 {
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308 compositor_.reset(compositor);
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309 }
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310 }
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311
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312 #if DISABLE_DEPRECATED_FIND_EVENT_TARGET_BEHAVIOR == 1
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313 // everything OK..... we're using the new setting
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314 #else
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315 #pragma message("WARNING: DISABLE_DEPRECATED_FIND_EVENT_TARGET_BEHAVIOR is not defined or equal to 0. Stone will use the OLD Emscripten rules for DOM element selection.")
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316 #endif
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317
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318 WebAssemblyViewport::WebAssemblyViewport(
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319 const std::string& canvasId, bool enableEmscriptenMouseEvents) :
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320 canvasId_(canvasId),
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321 #if DISABLE_DEPRECATED_FIND_EVENT_TARGET_BEHAVIOR == 1
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322 canvasCssSelector_("#" + canvasId),
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323 #else
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324 canvasCssSelector_(canvasId),
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325 #endif
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326 interactor_(new DefaultViewportInteractor),
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327 enableEmscriptenMouseEvents_(enableEmscriptenMouseEvents),
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328 canvasWidth_(0),
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329 canvasHeight_(0)
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330 {
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331 }
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332
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333 void WebAssemblyViewport::PostConstructor()
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334 {
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335 boost::shared_ptr<IViewport> viewport = shared_from_this();
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336 controller_.reset(new ViewportController(viewport));
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337
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338 LOG(INFO) << "Initializing Stone viewport on HTML canvas: "
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339 << canvasId_;
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340
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341 if (canvasId_.empty() ||
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342 canvasId_[0] == '#')
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343 {
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344 throw Orthanc::OrthancException(Orthanc::ErrorCode_ParameterOutOfRange,
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345 "The canvas identifier must not start with '#'");
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346 }
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347
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348 // Disable right-click on the canvas (i.e. context menu)
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349 EM_ASM({
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350 document.getElementById(UTF8ToString($0)).oncontextmenu =
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parents:
diff changeset
351 function(event)
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parents:
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352 {
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diff changeset
353 event.preventDefault();
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parents:
diff changeset
354 }
917500c46fe0 moved the Platform folder from the Applications folder to the Stone library itself
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parents:
diff changeset
355 },
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diff changeset
356 canvasId_.c_str() // $0
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357 );
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parents:
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358
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parents:
diff changeset
359 // It is not possible to monitor the resizing of individual
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parents:
diff changeset
360 // canvas, so we track the full window of the browser
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parents:
diff changeset
361 emscripten_set_resize_callback(EMSCRIPTEN_EVENT_TARGET_WINDOW,
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parents:
diff changeset
362 reinterpret_cast<void*>(this),
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parents:
diff changeset
363 false,
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parents:
diff changeset
364 OnResize);
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parents:
diff changeset
365
917500c46fe0 moved the Platform folder from the Applications folder to the Stone library itself
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parents:
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366 if (enableEmscriptenMouseEvents_)
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parents:
diff changeset
367 {
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parents:
diff changeset
368
917500c46fe0 moved the Platform folder from the Applications folder to the Stone library itself
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parents:
diff changeset
369 // if any of this function causes an error in the console, please
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parents:
diff changeset
370 // make sure you are using the new (as of 1.39.x) version of
917500c46fe0 moved the Platform folder from the Applications folder to the Stone library itself
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parents:
diff changeset
371 // emscripten element lookup rules( pass
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parents:
diff changeset
372 // "-s DISABLE_DEPRECATED_FIND_EVENT_TARGET_BEHAVIOR=1" to the linker.
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parents:
diff changeset
373
917500c46fe0 moved the Platform folder from the Applications folder to the Stone library itself
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parents:
diff changeset
374 emscripten_set_mousedown_callback(canvasCssSelector_.c_str(),
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parents:
diff changeset
375 reinterpret_cast<void*>(this),
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parents:
diff changeset
376 false,
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parents:
diff changeset
377 OnMouseDown);
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parents:
diff changeset
378
917500c46fe0 moved the Platform folder from the Applications folder to the Stone library itself
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parents:
diff changeset
379 emscripten_set_mousemove_callback(canvasCssSelector_.c_str(),
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parents:
diff changeset
380 reinterpret_cast<void*>(this),
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parents:
diff changeset
381 false,
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parents:
diff changeset
382 OnMouseMove);
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parents:
diff changeset
383
917500c46fe0 moved the Platform folder from the Applications folder to the Stone library itself
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parents:
diff changeset
384 emscripten_set_mouseup_callback(canvasCssSelector_.c_str(),
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parents:
diff changeset
385 reinterpret_cast<void*>(this),
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parents:
diff changeset
386 false,
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parents:
diff changeset
387 OnMouseUp);
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parents:
diff changeset
388 }
917500c46fe0 moved the Platform folder from the Applications folder to the Stone library itself
Alain Mazy <am@osimis.io>
parents:
diff changeset
389 }
917500c46fe0 moved the Platform folder from the Applications folder to the Stone library itself
Alain Mazy <am@osimis.io>
parents:
diff changeset
390
917500c46fe0 moved the Platform folder from the Applications folder to the Stone library itself
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parents:
diff changeset
391 WebAssemblyViewport::~WebAssemblyViewport()
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parents:
diff changeset
392 {
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parents:
diff changeset
393 LOG(TRACE) << "WebAssemblyViewport::~WebAssemblyViewport()\n";
917500c46fe0 moved the Platform folder from the Applications folder to the Stone library itself
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parents:
diff changeset
394
917500c46fe0 moved the Platform folder from the Applications folder to the Stone library itself
Alain Mazy <am@osimis.io>
parents:
diff changeset
395 emscripten_set_resize_callback(EMSCRIPTEN_EVENT_TARGET_WINDOW,
917500c46fe0 moved the Platform folder from the Applications folder to the Stone library itself
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parents:
diff changeset
396 reinterpret_cast<void*>(this),
917500c46fe0 moved the Platform folder from the Applications folder to the Stone library itself
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parents:
diff changeset
397 false,
917500c46fe0 moved the Platform folder from the Applications folder to the Stone library itself
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parents:
diff changeset
398 NULL);
917500c46fe0 moved the Platform folder from the Applications folder to the Stone library itself
Alain Mazy <am@osimis.io>
parents:
diff changeset
399
917500c46fe0 moved the Platform folder from the Applications folder to the Stone library itself
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parents:
diff changeset
400 if (enableEmscriptenMouseEvents_)
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Alain Mazy <am@osimis.io>
parents:
diff changeset
401 {
917500c46fe0 moved the Platform folder from the Applications folder to the Stone library itself
Alain Mazy <am@osimis.io>
parents:
diff changeset
402
917500c46fe0 moved the Platform folder from the Applications folder to the Stone library itself
Alain Mazy <am@osimis.io>
parents:
diff changeset
403 emscripten_set_mousedown_callback(canvasCssSelector_.c_str(),
917500c46fe0 moved the Platform folder from the Applications folder to the Stone library itself
Alain Mazy <am@osimis.io>
parents:
diff changeset
404 reinterpret_cast<void*>(this),
917500c46fe0 moved the Platform folder from the Applications folder to the Stone library itself
Alain Mazy <am@osimis.io>
parents:
diff changeset
405 false,
917500c46fe0 moved the Platform folder from the Applications folder to the Stone library itself
Alain Mazy <am@osimis.io>
parents:
diff changeset
406 NULL);
917500c46fe0 moved the Platform folder from the Applications folder to the Stone library itself
Alain Mazy <am@osimis.io>
parents:
diff changeset
407
917500c46fe0 moved the Platform folder from the Applications folder to the Stone library itself
Alain Mazy <am@osimis.io>
parents:
diff changeset
408 emscripten_set_mousemove_callback(canvasCssSelector_.c_str(),
917500c46fe0 moved the Platform folder from the Applications folder to the Stone library itself
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parents:
diff changeset
409 reinterpret_cast<void*>(this),
917500c46fe0 moved the Platform folder from the Applications folder to the Stone library itself
Alain Mazy <am@osimis.io>
parents:
diff changeset
410 false,
917500c46fe0 moved the Platform folder from the Applications folder to the Stone library itself
Alain Mazy <am@osimis.io>
parents:
diff changeset
411 NULL);
917500c46fe0 moved the Platform folder from the Applications folder to the Stone library itself
Alain Mazy <am@osimis.io>
parents:
diff changeset
412
917500c46fe0 moved the Platform folder from the Applications folder to the Stone library itself
Alain Mazy <am@osimis.io>
parents:
diff changeset
413 emscripten_set_mouseup_callback(canvasCssSelector_.c_str(),
917500c46fe0 moved the Platform folder from the Applications folder to the Stone library itself
Alain Mazy <am@osimis.io>
parents:
diff changeset
414 reinterpret_cast<void*>(this),
917500c46fe0 moved the Platform folder from the Applications folder to the Stone library itself
Alain Mazy <am@osimis.io>
parents:
diff changeset
415 false,
917500c46fe0 moved the Platform folder from the Applications folder to the Stone library itself
Alain Mazy <am@osimis.io>
parents:
diff changeset
416 NULL);
917500c46fe0 moved the Platform folder from the Applications folder to the Stone library itself
Alain Mazy <am@osimis.io>
parents:
diff changeset
417 }
917500c46fe0 moved the Platform folder from the Applications folder to the Stone library itself
Alain Mazy <am@osimis.io>
parents:
diff changeset
418 }
917500c46fe0 moved the Platform folder from the Applications folder to the Stone library itself
Alain Mazy <am@osimis.io>
parents:
diff changeset
419
917500c46fe0 moved the Platform folder from the Applications folder to the Stone library itself
Alain Mazy <am@osimis.io>
parents:
diff changeset
420 IViewport::ILock* WebAssemblyViewport::Lock()
917500c46fe0 moved the Platform folder from the Applications folder to the Stone library itself
Alain Mazy <am@osimis.io>
parents:
diff changeset
421 {
917500c46fe0 moved the Platform folder from the Applications folder to the Stone library itself
Alain Mazy <am@osimis.io>
parents:
diff changeset
422 return new WasmLock(*this);
917500c46fe0 moved the Platform folder from the Applications folder to the Stone library itself
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parents:
diff changeset
423 }
917500c46fe0 moved the Platform folder from the Applications folder to the Stone library itself
Alain Mazy <am@osimis.io>
parents:
diff changeset
424
917500c46fe0 moved the Platform folder from the Applications folder to the Stone library itself
Alain Mazy <am@osimis.io>
parents:
diff changeset
425 void WebAssemblyViewport::AcquireInteractor(IViewportInteractor* interactor)
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Alain Mazy <am@osimis.io>
parents:
diff changeset
426 {
917500c46fe0 moved the Platform folder from the Applications folder to the Stone library itself
Alain Mazy <am@osimis.io>
parents:
diff changeset
427 if (interactor == NULL)
917500c46fe0 moved the Platform folder from the Applications folder to the Stone library itself
Alain Mazy <am@osimis.io>
parents:
diff changeset
428 {
917500c46fe0 moved the Platform folder from the Applications folder to the Stone library itself
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parents:
diff changeset
429 throw Orthanc::OrthancException(Orthanc::ErrorCode_NullPointer);
917500c46fe0 moved the Platform folder from the Applications folder to the Stone library itself
Alain Mazy <am@osimis.io>
parents:
diff changeset
430 }
917500c46fe0 moved the Platform folder from the Applications folder to the Stone library itself
Alain Mazy <am@osimis.io>
parents:
diff changeset
431 else
917500c46fe0 moved the Platform folder from the Applications folder to the Stone library itself
Alain Mazy <am@osimis.io>
parents:
diff changeset
432 {
917500c46fe0 moved the Platform folder from the Applications folder to the Stone library itself
Alain Mazy <am@osimis.io>
parents:
diff changeset
433 interactor_.reset(interactor);
917500c46fe0 moved the Platform folder from the Applications folder to the Stone library itself
Alain Mazy <am@osimis.io>
parents:
diff changeset
434 }
917500c46fe0 moved the Platform folder from the Applications folder to the Stone library itself
Alain Mazy <am@osimis.io>
parents:
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435 }
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436
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437
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438 void WebAssemblyViewport::RefreshCanvasSize()
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439 {
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440 double w = -1, h = -1;
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441 EMSCRIPTEN_RESULT result =
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442 emscripten_get_element_css_size(GetCanvasCssSelector().c_str(), &w, &h);
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443
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444 if (result != EMSCRIPTEN_RESULT_SUCCESS)
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445 {
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446 LOG(WARNING) << "WebAssemblyViewport::RefreshCanvasSize failed to "
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447 << "retrieve CSS size for " << GetCanvasCssSelector();
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448 }
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449
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450 /**
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451 * Emscripten has the function emscripten_get_element_css_size()
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452 * to query the width and height of a named HTML element. I'm
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453 * calling this first to get the initial size of the canvas DOM
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454 * element, and then call emscripten_set_canvas_size() to
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455 * initialize the framebuffer size of the canvas to the same
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456 * size as its DOM element.
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457 * https://floooh.github.io/2017/02/22/emsc-html.html
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458 **/
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459 if (w > 0 &&
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460 h > 0)
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461 {
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462 canvasWidth_ = static_cast<unsigned int>(boost::math::iround(w));
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463 canvasHeight_ = static_cast<unsigned int>(boost::math::iround(h));
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464 }
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465 else
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466 {
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467 canvasWidth_ = 0;
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468 canvasHeight_ = 0;
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469 }
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470
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471 emscripten_set_canvas_element_size(GetCanvasCssSelector().c_str(), canvasWidth_, canvasHeight_);
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472
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473 if (compositor_.get() != NULL)
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474 {
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475 compositor_->SetCanvasSize(canvasWidth_, canvasHeight_);
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476 }
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477 }
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478 }