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annotate Samples/WebAssembly/BasicScene.cpp @ 616:97926984d5d0

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WebAssembly sample using Scene2D
author Sebastien Jodogne <s.jodogne@gmail.com>
date Thu, 02 May 2019 13:27:41 +0200
parents
children 7efa2543699d
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616
97926984d5d0 WebAssembly sample using Scene2D
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1 /**
97926984d5d0 WebAssembly sample using Scene2D
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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
97926984d5d0 WebAssembly sample using Scene2D
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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
97926984d5d0 WebAssembly sample using Scene2D
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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
97926984d5d0 WebAssembly sample using Scene2D
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14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
97926984d5d0 WebAssembly sample using Scene2D
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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
97926984d5d0 WebAssembly sample using Scene2D
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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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22
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23 #include <emscripten.h>
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24 #include <emscripten/html5.h>
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25
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26 // From Stone
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27 #include "../../Applications/Sdl/SdlOpenGLWindow.h"
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28 #include "../../Framework/Scene2D/CairoCompositor.h"
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29 #include "../../Framework/Scene2D/ColorTextureSceneLayer.h"
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30 #include "../../Framework/Scene2D/OpenGLCompositor.h"
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31 #include "../../Framework/Scene2D/PanSceneTracker.h"
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32 #include "../../Framework/Scene2D/RotateSceneTracker.h"
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33 #include "../../Framework/Scene2D/Scene2D.h"
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34 #include "../../Framework/Scene2D/ZoomSceneTracker.h"
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35 #include "../../Framework/StoneInitialization.h"
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36 #include "../../Framework/OpenGL/WebAssemblyOpenGLContext.h"
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37
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38 // From Orthanc framework
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39 #include <Core/Images/Image.h>
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40
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41 #include <stdio.h>
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42
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43 static const unsigned int FONT_SIZE = 32;
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44
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45
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46 void PrepareScene(OrthancStone::Scene2D& scene)
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47 {
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48 using namespace OrthancStone;
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49
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50 // Texture of 2x2 size
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51 if (1)
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52 {
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53 Orthanc::Image i(Orthanc::PixelFormat_RGB24, 2, 2, false);
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54
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55 uint8_t *p = reinterpret_cast<uint8_t*>(i.GetRow(0));
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56 p[0] = 255;
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57 p[1] = 0;
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58 p[2] = 0;
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59
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60 p[3] = 0;
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61 p[4] = 255;
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62 p[5] = 0;
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63
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64 p = reinterpret_cast<uint8_t*>(i.GetRow(1));
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65 p[0] = 0;
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66 p[1] = 0;
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67 p[2] = 255;
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68
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69 p[3] = 255;
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70 p[4] = 0;
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71 p[5] = 0;
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72
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73 scene.SetLayer(12, new ColorTextureSceneLayer(i));
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74
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75 std::auto_ptr<ColorTextureSceneLayer> l(new ColorTextureSceneLayer(i));
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76 l->SetOrigin(-3, 2);
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77 l->SetPixelSpacing(1.5, 1);
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78 l->SetAngle(20.0 / 180.0 * M_PI);
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79 scene.SetLayer(14, l.release());
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80 }
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81
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82 // Texture of 1x1 size
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83 if (1)
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84 {
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85 Orthanc::Image i(Orthanc::PixelFormat_RGB24, 1, 1, false);
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86
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87 uint8_t *p = reinterpret_cast<uint8_t*>(i.GetRow(0));
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88 p[0] = 255;
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89 p[1] = 0;
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90 p[2] = 0;
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91
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92 std::auto_ptr<ColorTextureSceneLayer> l(new ColorTextureSceneLayer(i));
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93 l->SetOrigin(-2, 1);
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94 l->SetAngle(20.0 / 180.0 * M_PI);
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95 scene.SetLayer(13, l.release());
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96 }
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97
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98 // Some lines
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99 {
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100 std::auto_ptr<PolylineSceneLayer> layer(new PolylineSceneLayer);
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101
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102 layer->SetThickness(1);
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103
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104 PolylineSceneLayer::Chain chain;
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105 chain.push_back(ScenePoint2D(0 - 0.5, 0 - 0.5));
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106 chain.push_back(ScenePoint2D(0 - 0.5, 2 - 0.5));
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107 chain.push_back(ScenePoint2D(2 - 0.5, 2 - 0.5));
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108 chain.push_back(ScenePoint2D(2 - 0.5, 0 - 0.5));
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109 layer->AddChain(chain, true);
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110
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111 chain.clear();
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112 chain.push_back(ScenePoint2D(-5, -5));
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113 chain.push_back(ScenePoint2D(5, -5));
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114 chain.push_back(ScenePoint2D(5, 5));
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115 chain.push_back(ScenePoint2D(-5, 5));
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116 layer->AddChain(chain, true);
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117
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118 double dy = 1.01;
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119 chain.clear();
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120 chain.push_back(ScenePoint2D(-4, -4));
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121 chain.push_back(ScenePoint2D(4, -4 + dy));
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122 chain.push_back(ScenePoint2D(-4, -4 + 2.0 * dy));
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123 chain.push_back(ScenePoint2D(4, 2));
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124 layer->AddChain(chain, false);
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125
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126 layer->SetColor(0,255, 255);
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127 scene.SetLayer(50, layer.release());
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128 }
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129
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130 // Some text
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131 if (1)
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132 {
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133 std::auto_ptr<TextSceneLayer> layer(new TextSceneLayer);
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134 layer->SetText("Hello");
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135 scene.SetLayer(100, layer.release());
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136 }
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137 }
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138
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139
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140
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141
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142
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143 class WebAssemblyCanvas : public boost::noncopyable
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144 {
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145 private:
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146 OrthancStone::OpenGL::WebAssemblyOpenGLContext context_;
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147 OrthancStone::Scene2D scene_;
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148 OrthancStone::OpenGLCompositor compositor_;
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149
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150 public:
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151 WebAssemblyCanvas(const std::string& canvas) :
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152 context_(canvas),
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153 compositor_(context_, scene_)
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154 {
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155 compositor_.SetFont(0, Orthanc::EmbeddedResources::UBUNTU_FONT,
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156 FONT_SIZE, Orthanc::Encoding_Latin1);
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157 }
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158
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159 OrthancStone::Scene2D& GetScene()
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160 {
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161 return scene_;
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162 }
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163
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164 void UpdateSize()
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165 {
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166 context_.UpdateSize();
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167 compositor_.UpdateSize();
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168 Refresh();
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169 }
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170
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171 void Refresh()
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172 {
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173 compositor_.Refresh();
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174 }
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175 };
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176
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177
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178
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179 std::auto_ptr<WebAssemblyCanvas> canvas1_;
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180 std::auto_ptr<WebAssemblyCanvas> canvas2_;
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181 std::auto_ptr<WebAssemblyCanvas> canvas3_;
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182
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183
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184 EM_BOOL OnWindowResize(int eventType, const EmscriptenUiEvent *uiEvent, void *userData)
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185 {
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186 if (canvas1_.get() != NULL)
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187 {
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188 canvas1_->UpdateSize();
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189 }
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190
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191 if (canvas2_.get() != NULL)
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192 {
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193 canvas2_->UpdateSize();
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194 }
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195
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196 if (canvas3_.get() != NULL)
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197 {
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198 canvas3_->UpdateSize();
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199 }
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200
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201 return true;
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202 }
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203
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204
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205 EM_BOOL OnMouseClick(int eventType, const EmscriptenMouseEvent *mouseEvent, void *userData)
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206 {
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207 if (userData != NULL)
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208 {
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209 WebAssemblyCanvas& canvas = *reinterpret_cast<WebAssemblyCanvas*>(userData);
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210
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211 static unsigned int count = 0;
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212 char buf[64];
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213 sprintf(buf, "click %d", count++);
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214
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215 std::auto_ptr<OrthancStone::TextSceneLayer> layer(new OrthancStone::TextSceneLayer);
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216 layer->SetText(buf);
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217 canvas.GetScene().SetLayer(100, layer.release());
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218 canvas.Refresh();
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219 }
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220
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221 return true;
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222 }
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223
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224
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225 extern "C"
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226 {
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227 int main(int argc, char const *argv[])
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228 {
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229 OrthancStone::StoneInitialize();
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230 EM_ASM(window.dispatchEvent(new CustomEvent("WebAssemblyLoaded")););
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231 }
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232
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233 EMSCRIPTEN_KEEPALIVE
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234 void Initialize()
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235 {
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236 canvas1_.reset(new WebAssemblyCanvas("mycanvas1"));
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237 PrepareScene(canvas1_->GetScene());
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238 canvas1_->UpdateSize();
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239
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240 canvas2_.reset(new WebAssemblyCanvas("mycanvas2"));
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241 PrepareScene(canvas2_->GetScene());
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242 canvas2_->UpdateSize();
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243
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244 canvas3_.reset(new WebAssemblyCanvas("mycanvas3"));
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245 PrepareScene(canvas3_->GetScene());
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246 canvas3_->UpdateSize();
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247
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248 emscripten_set_resize_callback("#window", NULL, false, OnWindowResize);
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249 emscripten_set_click_callback("mycanvas1", canvas1_.get(), false, OnMouseClick);
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250 emscripten_set_click_callback("mycanvas2", canvas2_.get(), false, OnMouseClick);
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251 emscripten_set_click_callback("mycanvas3", canvas3_.get(), false, OnMouseClick);
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252 }
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253 }