Mercurial > hg > orthanc-stone
annotate Framework/Viewport/WebAssemblyViewport.cpp @ 1232:a28861abf888 broker
viewports for WebAssembly
author | Sebastien Jodogne <s.jodogne@gmail.com> |
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date | Mon, 09 Dec 2019 17:46:33 +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) 2017-2019 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 "WebAssemblyViewport.h" |
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24 #include <Core/OrthancException.h> |
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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 static void ConvertMouseEvent(PointerEvent& target, |
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31 const EmscriptenMouseEvent& source, |
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32 const ICompositor& compositor) |
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33 { |
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34 int x = static_cast<int>(source.targetX); |
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35 int y = static_cast<int>(source.targetY); |
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36 |
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37 switch (source.button) |
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38 { |
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39 case 0: |
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40 target.SetMouseButton(MouseButton_Left); |
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41 break; |
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42 |
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43 case 1: |
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44 target.SetMouseButton(MouseButton_Middle); |
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45 break; |
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46 |
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47 case 2: |
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48 target.SetMouseButton(MouseButton_Right); |
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49 break; |
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51 default: |
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52 target.SetMouseButton(MouseButton_None); |
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53 break; |
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54 } |
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55 |
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56 target.AddPosition(compositor.GetPixelCenterCoordinates(x, y)); |
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57 target.SetAltModifier(source.altKey); |
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58 target.SetControlModifier(source.ctrlKey); |
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59 target.SetShiftModifier(source.shiftKey); |
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60 } |
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61 |
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62 |
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63 class WebAssemblyViewport::WasmLock : public ILock |
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64 { |
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65 private: |
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66 WebAssemblyViewport& that_; |
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67 |
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68 public: |
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69 WasmLock(WebAssemblyViewport& that) : |
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70 that_(that) |
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71 { |
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72 } |
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73 |
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74 virtual bool HasCompositor() const ORTHANC_OVERRIDE |
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75 { |
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76 return that_.compositor_.get() != NULL; |
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77 } |
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78 |
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79 virtual ICompositor& GetCompositor() ORTHANC_OVERRIDE |
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80 { |
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81 if (that_.compositor_.get() == NULL) |
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83 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls); |
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85 else | |
86 { | |
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87 return *that_.compositor_; |
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89 } |
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90 |
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91 virtual ViewportController& GetController() ORTHANC_OVERRIDE |
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92 { |
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93 assert(that_.controller_); |
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94 return *that_.controller_; |
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95 } |
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96 |
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97 virtual void Invalidate() ORTHANC_OVERRIDE |
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98 { |
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99 that_.Invalidate(); |
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100 } |
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101 }; |
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102 |
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103 |
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104 EM_BOOL WebAssemblyViewport::OnRequestAnimationFrame(double time, void *userData) |
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105 { |
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106 WebAssemblyViewport& that = *reinterpret_cast<WebAssemblyViewport*>(userData); |
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107 |
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108 if (that.compositor_.get() != NULL && |
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109 that.controller_ /* should always be true */) |
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110 { |
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111 that.Paint(*that.compositor_, *that.controller_); |
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112 } |
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113 |
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114 return true; |
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115 } |
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116 |
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117 |
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118 EM_BOOL WebAssemblyViewport::OnResize(int eventType, const EmscriptenUiEvent *uiEvent, void *userData) |
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119 { |
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120 WebAssemblyViewport& that = *reinterpret_cast<WebAssemblyViewport*>(userData); |
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121 |
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122 if (that.compositor_.get() != NULL) |
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123 { |
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124 that.UpdateSize(*that.compositor_); |
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125 that.Invalidate(); |
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126 } |
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127 |
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128 return true; |
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129 } |
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130 |
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131 |
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132 EM_BOOL WebAssemblyViewport::OnMouseDown(int eventType, const EmscriptenMouseEvent *mouseEvent, void *userData) |
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133 { |
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134 WebAssemblyViewport& that = *reinterpret_cast<WebAssemblyViewport*>(userData); |
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135 |
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136 LOG(INFO) << "mouse down: " << that.GetFullCanvasId(); |
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137 |
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138 if (that.compositor_.get() != NULL && |
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139 that.interactor_.get() != NULL) |
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140 { |
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141 PointerEvent pointer; |
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142 ConvertMouseEvent(pointer, *mouseEvent, *that.compositor_); |
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143 |
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144 that.controller_->HandleMousePress(*that.interactor_, pointer, |
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145 that.compositor_->GetCanvasWidth(), |
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146 that.compositor_->GetCanvasHeight()); |
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147 that.Invalidate(); |
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148 } |
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149 |
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150 return true; |
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151 } |
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152 |
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153 |
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154 EM_BOOL WebAssemblyViewport::OnMouseMove(int eventType, const EmscriptenMouseEvent *mouseEvent, void *userData) |
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155 { |
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156 WebAssemblyViewport& that = *reinterpret_cast<WebAssemblyViewport*>(userData); |
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157 |
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158 if (that.compositor_.get() != NULL && |
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159 that.controller_->HasActiveTracker()) |
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160 { |
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161 PointerEvent pointer; |
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162 ConvertMouseEvent(pointer, *mouseEvent, *that.compositor_); |
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163 that.controller_->HandleMouseMove(pointer); |
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164 that.Invalidate(); |
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165 } |
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166 |
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167 return true; |
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168 } |
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169 |
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170 |
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171 EM_BOOL WebAssemblyViewport::OnMouseUp(int eventType, const EmscriptenMouseEvent *mouseEvent, void *userData) |
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172 { |
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173 WebAssemblyViewport& that = *reinterpret_cast<WebAssemblyViewport*>(userData); |
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174 |
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175 if (that.compositor_.get() != NULL) |
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176 { |
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177 PointerEvent pointer; |
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178 ConvertMouseEvent(pointer, *mouseEvent, *that.compositor_); |
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179 that.controller_->HandleMouseRelease(pointer); |
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180 that.Invalidate(); |
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181 } |
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182 |
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183 return true; |
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184 } |
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185 |
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186 |
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187 void WebAssemblyViewport::Invalidate() |
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188 { |
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189 emscripten_request_animation_frame(OnRequestAnimationFrame, this); |
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190 } |
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191 |
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192 |
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193 void WebAssemblyViewport::AcquireCompositor(ICompositor* compositor /* takes ownership */) |
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194 { |
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195 if (compositor == NULL) |
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196 { |
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197 throw Orthanc::OrthancException(Orthanc::ErrorCode_NullPointer); |
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198 } |
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199 else |
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200 { |
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201 compositor_.reset(compositor); |
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202 } |
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203 } |
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204 |
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205 |
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206 WebAssemblyViewport::WebAssemblyViewport(const std::string& canvasId, |
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207 const Scene2D* scene) : |
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208 shortCanvasId_(canvasId), |
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209 fullCanvasId_("#" + canvasId), |
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210 interactor_(new DefaultViewportInteractor) |
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211 { |
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212 if (scene == NULL) |
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213 { |
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214 controller_ = boost::make_shared<ViewportController>(); |
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215 } |
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216 else |
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217 { |
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218 controller_ = boost::make_shared<ViewportController>(*scene); |
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219 } |
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220 |
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221 LOG(INFO) << "Initializing Stone viewport on HTML canvas: " << canvasId; |
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222 |
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223 if (canvasId.empty() || |
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224 canvasId[0] == '#') |
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225 { |
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226 throw Orthanc::OrthancException(Orthanc::ErrorCode_ParameterOutOfRange, |
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227 "The canvas identifier must not start with '#'"); |
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228 } |
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229 |
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230 // Disable right-click on the canvas (i.e. context menu) |
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231 EM_ASM({ |
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232 document.getElementById(UTF8ToString($0)).oncontextmenu = function(event) { |
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233 event.preventDefault(); |
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234 } |
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235 }, |
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236 canvasId.c_str() // $0 |
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237 ); |
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238 |
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239 // It is not possible to monitor the resizing of individual |
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240 // canvas, so we track the full window of the browser |
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241 emscripten_set_resize_callback(EMSCRIPTEN_EVENT_TARGET_WINDOW, this, false, OnResize); |
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242 |
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243 emscripten_set_mousedown_callback(fullCanvasId_.c_str(), this, false, OnMouseDown); |
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244 emscripten_set_mousemove_callback(fullCanvasId_.c_str(), this, false, OnMouseMove); |
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245 emscripten_set_mouseup_callback(fullCanvasId_.c_str(), this, false, OnMouseUp); |
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246 } |
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247 |
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248 |
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249 IViewport::ILock* WebAssemblyViewport::Lock() |
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250 { |
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251 return new WasmLock(*this); |
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252 } |
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253 |
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254 |
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255 void WebAssemblyViewport::AcquireInteractor(IViewportInteractor* interactor) |
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256 { |
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257 if (interactor == NULL) |
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258 { |
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259 throw Orthanc::OrthancException(Orthanc::ErrorCode_NullPointer); |
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260 } |
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261 else |
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262 { |
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263 interactor_.reset(interactor); |
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264 } |
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265 } |
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266 } |