Mercurial > hg > orthanc-stone

annotate Samples/WebAssembly/BasicScene.cpp @ 617:7efa2543699d

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simplification
author Sebastien Jodogne <s.jodogne@gmail.com>
date Thu, 02 May 2019 18:21:59 +0200
parents 97926984d5d0
children 0925b27e8750
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616
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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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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 #include <Core/Logging.h>
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41
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42 #include <stdio.h>
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43
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44 static const unsigned int FONT_SIZE = 32;
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45
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46
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47 void PrepareScene(OrthancStone::Scene2D& scene)
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48 {
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49 using namespace OrthancStone;
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50
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51 // Texture of 2x2 size
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52 if (1)
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53 {
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54 Orthanc::Image i(Orthanc::PixelFormat_RGB24, 2, 2, false);
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55
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56 uint8_t *p = reinterpret_cast<uint8_t*>(i.GetRow(0));
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57 p[0] = 255;
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58 p[1] = 0;
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59 p[2] = 0;
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60
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61 p[3] = 0;
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62 p[4] = 255;
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63 p[5] = 0;
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64
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65 p = reinterpret_cast<uint8_t*>(i.GetRow(1));
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66 p[0] = 0;
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67 p[1] = 0;
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68 p[2] = 255;
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69
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70 p[3] = 255;
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71 p[4] = 0;
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72 p[5] = 0;
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73
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74 scene.SetLayer(12, new ColorTextureSceneLayer(i));
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75
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76 std::auto_ptr<ColorTextureSceneLayer> l(new ColorTextureSceneLayer(i));
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77 l->SetOrigin(-3, 2);
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78 l->SetPixelSpacing(1.5, 1);
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79 l->SetAngle(20.0 / 180.0 * M_PI);
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80 scene.SetLayer(14, l.release());
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81 }
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82
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83 // Texture of 1x1 size
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84 if (1)
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85 {
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86 Orthanc::Image i(Orthanc::PixelFormat_RGB24, 1, 1, false);
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87
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88 uint8_t *p = reinterpret_cast<uint8_t*>(i.GetRow(0));
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89 p[0] = 255;
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90 p[1] = 0;
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91 p[2] = 0;
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92
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93 std::auto_ptr<ColorTextureSceneLayer> l(new ColorTextureSceneLayer(i));
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94 l->SetOrigin(-2, 1);
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95 l->SetAngle(20.0 / 180.0 * M_PI);
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96 scene.SetLayer(13, l.release());
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97 }
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98
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99 // Some lines
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100 {
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101 std::auto_ptr<PolylineSceneLayer> layer(new PolylineSceneLayer);
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102
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103 layer->SetThickness(1);
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104
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105 PolylineSceneLayer::Chain chain;
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106 chain.push_back(ScenePoint2D(0 - 0.5, 0 - 0.5));
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107 chain.push_back(ScenePoint2D(0 - 0.5, 2 - 0.5));
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108 chain.push_back(ScenePoint2D(2 - 0.5, 2 - 0.5));
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109 chain.push_back(ScenePoint2D(2 - 0.5, 0 - 0.5));
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110 layer->AddChain(chain, true);
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111
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112 chain.clear();
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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 chain.push_back(ScenePoint2D(-5, 5));
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117 layer->AddChain(chain, true);
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118
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119 double dy = 1.01;
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120 chain.clear();
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121 chain.push_back(ScenePoint2D(-4, -4));
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122 chain.push_back(ScenePoint2D(4, -4 + dy));
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123 chain.push_back(ScenePoint2D(-4, -4 + 2.0 * dy));
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124 chain.push_back(ScenePoint2D(4, 2));
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125 layer->AddChain(chain, false);
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126
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127 layer->SetColor(0,255, 255);
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128 scene.SetLayer(50, layer.release());
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129 }
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130
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131 // Some text
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132 if (1)
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133 {
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134 std::auto_ptr<TextSceneLayer> layer(new TextSceneLayer);
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135 layer->SetText("Hello");
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136 scene.SetLayer(100, layer.release());
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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 namespace OrthancStone
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144 {
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145 class WebAssemblyCanvas : public boost::noncopyable
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146 {
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147 private:
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148 OpenGL::WebAssemblyOpenGLContext context_;
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149 Scene2D scene_;
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150 OpenGLCompositor compositor_;
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151
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152 void SetupEvents(const std::string& canvas);
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153
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154 public:
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155 WebAssemblyCanvas(const std::string& canvas) :
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156 context_(canvas),
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157 compositor_(context_, scene_)
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158 {
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159 compositor_.SetFont(0, Orthanc::EmbeddedResources::UBUNTU_FONT,
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160 FONT_SIZE, Orthanc::Encoding_Latin1);
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161 SetupEvents(canvas);
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162 }
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163
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164 Scene2D& GetScene()
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165 {
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166 return scene_;
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167 }
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168
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169 void UpdateSize()
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170 {
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171 context_.UpdateSize();
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172 compositor_.UpdateSize();
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173 Refresh();
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174 }
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175
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176 void Refresh()
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177 {
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178 compositor_.Refresh();
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179 }
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180
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181 const std::string& GetCanvasIdentifier() const
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182 {
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183 return context_.GetCanvasIdentifier();
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184 }
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185
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186 ScenePoint2D GetPixelCenterCoordinates(int x, int y) const
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187 {
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188 return compositor_.GetPixelCenterCoordinates(x, y);
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189 }
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190 };
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191
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192
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193
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194 class ActiveTracker : public boost::noncopyable
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195 {
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196 private:
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197 std::auto_ptr<IPointerTracker> tracker_;
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198 std::string canvasIdentifier_;
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199 bool insideCanvas_;
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200
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201 public:
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202 ActiveTracker(IPointerTracker* tracker,
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203 const WebAssemblyCanvas& canvas) :
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204 tracker_(tracker),
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205 canvasIdentifier_(canvas.GetCanvasIdentifier()),
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206 insideCanvas_(true)
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207 {
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208 }
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209 };
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210 }
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211
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212
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213
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214 static OrthancStone::PointerEvent* ConvertMouseEvent(const EmscriptenMouseEvent& source,
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215 OrthancStone::WebAssemblyCanvas& canvas)
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216 {
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217 std::auto_ptr<OrthancStone::PointerEvent> target(new OrthancStone::PointerEvent);
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218
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219 target->AddPosition(canvas.GetPixelCenterCoordinates(source.clientX, source.clientY));
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220 target->SetAltModifier(source.altKey);
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221 target->SetControlModifier(source.ctrlKey);
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222 target->SetShiftModifier(source.shiftKey);
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223
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224 return target.release();
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225 }
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226
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227
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228 EM_BOOL OnMouseEvent(int eventType,
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229 const EmscriptenMouseEvent *mouseEvent,
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230 void *userData)
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231 {
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232 if (userData != NULL)
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233 {
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234 OrthancStone::WebAssemblyCanvas& canvas = *reinterpret_cast<OrthancStone::WebAssemblyCanvas*>(userData);
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235
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236 switch (eventType)
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237 {
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238 case EMSCRIPTEN_EVENT_CLICK:
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239 {
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240 static unsigned int count = 0;
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241 char buf[64];
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242 sprintf(buf, "click %d", count++);
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243
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244 std::auto_ptr<OrthancStone::TextSceneLayer> layer(new OrthancStone::TextSceneLayer);
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245 layer->SetText(buf);
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246 canvas.GetScene().SetLayer(100, layer.release());
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247 canvas.Refresh();
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248 break;
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249 }
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250
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251 case EMSCRIPTEN_EVENT_MOUSEDOWN:
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252 LOG(ERROR) << "Mouse down";
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253 break;
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254
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255 default:
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256 break;
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257 }
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258 }
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259
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260 return true;
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261 }
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262
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263
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264 void OrthancStone::WebAssemblyCanvas::SetupEvents(const std::string& canvas)
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265 {
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266 emscripten_set_click_callback(canvas.c_str(), this, false, OnMouseEvent);
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267 //emscripten_set_mousedown_callback(canvas.c_str(), this, false, OnMouseEvent);
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268 }
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269
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270
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271
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272
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273 std::auto_ptr<OrthancStone::WebAssemblyCanvas> canvas1_;
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274 std::auto_ptr<OrthancStone::WebAssemblyCanvas> canvas2_;
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275 std::auto_ptr<OrthancStone::WebAssemblyCanvas> canvas3_;
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276 std::auto_ptr<OrthancStone::ActiveTracker> tracker_;
616
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277
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278
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279 EM_BOOL OnWindowResize(int eventType, const EmscriptenUiEvent *uiEvent, void *userData)
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280 {
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281 if (canvas1_.get() != NULL)
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282 {
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283 canvas1_->UpdateSize();
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284 }
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285
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286 if (canvas2_.get() != NULL)
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287 {
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288 canvas2_->UpdateSize();
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289 }
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290
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291 if (canvas3_.get() != NULL)
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292 {
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293 canvas3_->UpdateSize();
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294 }
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295
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296 return true;
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297 }
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298
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299
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300
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301 extern "C"
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302 {
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303 int main(int argc, char const *argv[])
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304 {
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305 OrthancStone::StoneInitialize();
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306 EM_ASM(window.dispatchEvent(new CustomEvent("WebAssemblyLoaded")););
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307 }
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308
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309 EMSCRIPTEN_KEEPALIVE
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310 void Initialize()
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311 {
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312 canvas1_.reset(new OrthancStone::WebAssemblyCanvas("mycanvas1"));
616
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313 PrepareScene(canvas1_->GetScene());
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314 canvas1_->UpdateSize();
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315
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316 canvas2_.reset(new OrthancStone::WebAssemblyCanvas("mycanvas2"));
616
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317 PrepareScene(canvas2_->GetScene());
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318 canvas2_->UpdateSize();
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319
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320 canvas3_.reset(new OrthancStone::WebAssemblyCanvas("mycanvas3"));
616
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321 PrepareScene(canvas3_->GetScene());
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322 canvas3_->UpdateSize();
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323
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324 emscripten_set_resize_callback("#window", NULL, false, OnWindowResize);
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325 }
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326 }