Mercurial > hg > orthanc-stone

annotate Samples/WebAssembly/BasicScene.cpp @ 631:ea8322566596

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author Sebastien Jodogne <s.jodogne@gmail.com>
date Wed, 08 May 2019 18:26:52 +0200
parents 0925b27e8750
children 419e5662d7a5
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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 #include <Core/OrthancException.h>
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42
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43 #include <stdio.h>
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44
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45 static const unsigned int FONT_SIZE = 32;
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46
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47
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48 void PrepareScene(OrthancStone::Scene2D& scene)
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49 {
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50 using namespace OrthancStone;
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51
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52 // Texture of 2x2 size
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53 if (1)
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54 {
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55 Orthanc::Image i(Orthanc::PixelFormat_RGB24, 2, 2, false);
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56
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57 uint8_t *p = reinterpret_cast<uint8_t*>(i.GetRow(0));
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58 p[0] = 255;
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59 p[1] = 0;
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60 p[2] = 0;
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61
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62 p[3] = 0;
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63 p[4] = 255;
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64 p[5] = 0;
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65
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66 p = reinterpret_cast<uint8_t*>(i.GetRow(1));
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67 p[0] = 0;
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68 p[1] = 0;
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69 p[2] = 255;
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70
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71 p[3] = 255;
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72 p[4] = 0;
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73 p[5] = 0;
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74
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75 scene.SetLayer(12, new ColorTextureSceneLayer(i));
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76
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77 std::auto_ptr<ColorTextureSceneLayer> l(new ColorTextureSceneLayer(i));
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78 l->SetOrigin(-3, 2);
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79 l->SetPixelSpacing(1.5, 1);
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80 l->SetAngle(20.0 / 180.0 * M_PI);
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81 scene.SetLayer(14, l.release());
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82 }
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83
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84 // Texture of 1x1 size
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85 if (1)
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86 {
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87 Orthanc::Image i(Orthanc::PixelFormat_RGB24, 1, 1, false);
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88
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89 uint8_t *p = reinterpret_cast<uint8_t*>(i.GetRow(0));
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90 p[0] = 255;
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91 p[1] = 0;
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92 p[2] = 0;
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93
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94 std::auto_ptr<ColorTextureSceneLayer> l(new ColorTextureSceneLayer(i));
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95 l->SetOrigin(-2, 1);
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96 l->SetAngle(20.0 / 180.0 * M_PI);
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97 scene.SetLayer(13, l.release());
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98 }
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99
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100 // Some lines
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101 {
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102 std::auto_ptr<PolylineSceneLayer> layer(new PolylineSceneLayer);
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103
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104 layer->SetThickness(1);
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105
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106 PolylineSceneLayer::Chain chain;
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107 chain.push_back(ScenePoint2D(0 - 0.5, 0 - 0.5));
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108 chain.push_back(ScenePoint2D(0 - 0.5, 2 - 0.5));
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109 chain.push_back(ScenePoint2D(2 - 0.5, 2 - 0.5));
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110 chain.push_back(ScenePoint2D(2 - 0.5, 0 - 0.5));
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111 layer->AddChain(chain, true);
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112
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113 chain.clear();
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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 chain.push_back(ScenePoint2D(-5, 5));
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118 layer->AddChain(chain, true);
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119
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120 double dy = 1.01;
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121 chain.clear();
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122 chain.push_back(ScenePoint2D(-4, -4));
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123 chain.push_back(ScenePoint2D(4, -4 + dy));
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124 chain.push_back(ScenePoint2D(-4, -4 + 2.0 * dy));
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125 chain.push_back(ScenePoint2D(4, 2));
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126 layer->AddChain(chain, false);
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127
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128 layer->SetColor(0,255, 255);
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129 scene.SetLayer(50, layer.release());
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130 }
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131
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132 // Some text
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133 if (1)
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134 {
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135 std::auto_ptr<TextSceneLayer> layer(new TextSceneLayer);
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136 layer->SetText("Hello");
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137 scene.SetLayer(100, layer.release());
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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
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144 namespace OrthancStone
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145 {
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146 class WebAssemblyViewport : public boost::noncopyable
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147 {
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148 private:
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149 OpenGL::WebAssemblyOpenGLContext context_;
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150 Scene2D scene_;
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151 OpenGLCompositor compositor_;
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152
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153 void SetupEvents(const std::string& canvas);
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154
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155 public:
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156 WebAssemblyViewport(const std::string& canvas) :
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157 context_(canvas),
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158 compositor_(context_, scene_)
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159 {
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160 compositor_.SetFont(0, Orthanc::EmbeddedResources::UBUNTU_FONT,
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161 FONT_SIZE, Orthanc::Encoding_Latin1);
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162 SetupEvents(canvas);
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163 }
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164
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165 Scene2D& GetScene()
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166 {
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167 return scene_;
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168 }
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169
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170 void UpdateSize()
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171 {
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172 context_.UpdateSize();
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173 compositor_.UpdateSize();
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174 Refresh();
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175 }
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176
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177 void Refresh()
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178 {
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179 compositor_.Refresh();
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180 }
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181
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182 const std::string& GetCanvasIdentifier() const
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183 {
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184 return context_.GetCanvasIdentifier();
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185 }
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186
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187 ScenePoint2D GetPixelCenterCoordinates(int x, int y) const
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188 {
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189 return compositor_.GetPixelCenterCoordinates(x, y);
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190 }
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191
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192 unsigned int GetCanvasWidth() const
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193 {
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194 return context_.GetCanvasWidth();
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195 }
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196
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197 unsigned int GetCanvasHeight() const
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198 {
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199 return context_.GetCanvasHeight();
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200 }
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201 };
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202
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203
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204
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205 class ActiveTracker : public boost::noncopyable
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206 {
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207 private:
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208 std::auto_ptr<IPointerTracker> tracker_;
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209 std::string canvasIdentifier_;
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210 bool insideCanvas_;
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211
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212 public:
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213 ActiveTracker(IPointerTracker* tracker,
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214 const WebAssemblyViewport& viewport) :
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215 tracker_(tracker),
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216 canvasIdentifier_(viewport.GetCanvasIdentifier()),
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217 insideCanvas_(true)
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218 {
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219 if (tracker_.get() == NULL)
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220 {
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221 throw Orthanc::OrthancException(Orthanc::ErrorCode_NullPointer);
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222 }
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223 }
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224
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225 void Update(const PointerEvent& event)
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226 {
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227 tracker_->Update(event);
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228 }
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229
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230 void Release()
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231 {
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232 tracker_->Release();
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233 }
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234 };
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235 }
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236
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237
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238
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239 static OrthancStone::PointerEvent* ConvertMouseEvent(const EmscriptenMouseEvent& source,
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240 OrthancStone::WebAssemblyViewport& viewport)
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241 {
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242 std::auto_ptr<OrthancStone::PointerEvent> target(new OrthancStone::PointerEvent);
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243
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244 target->AddPosition(viewport.GetPixelCenterCoordinates(source.targetX, source.targetY));
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245 target->SetAltModifier(source.altKey);
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246 target->SetControlModifier(source.ctrlKey);
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247 target->SetShiftModifier(source.shiftKey);
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248
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249 return target.release();
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250 }
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251
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252
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253 std::auto_ptr<OrthancStone::ActiveTracker> tracker_;
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254
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255
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256 EM_BOOL OnMouseEvent(int eventType,
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257 const EmscriptenMouseEvent *mouseEvent,
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258 void *userData)
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259 {
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260 if (mouseEvent != NULL &&
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261 userData != NULL)
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262 {
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263 OrthancStone::WebAssemblyViewport& viewport =
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264 *reinterpret_cast<OrthancStone::WebAssemblyViewport*>(userData);
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265
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266 switch (eventType)
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267 {
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268 case EMSCRIPTEN_EVENT_CLICK:
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269 {
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270 static unsigned int count = 0;
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271 char buf[64];
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272 sprintf(buf, "click %d", count++);
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273
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274 std::auto_ptr<OrthancStone::TextSceneLayer> layer(new OrthancStone::TextSceneLayer);
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275 layer->SetText(buf);
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276 viewport.GetScene().SetLayer(100, layer.release());
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277 viewport.Refresh();
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278 break;
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279 }
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280
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281 case EMSCRIPTEN_EVENT_MOUSEDOWN:
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282 {
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283 std::auto_ptr<OrthancStone::IPointerTracker> t;
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284
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285 {
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286 std::auto_ptr<OrthancStone::PointerEvent> event(ConvertMouseEvent(*mouseEvent, viewport));
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287
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288 switch (mouseEvent->button)
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289 {
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290 case 0: // Left button
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291 t.reset(new OrthancStone::RotateSceneTracker(viewport.GetScene(), *event));
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292 break;
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293
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294 case 1: // Middle button
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295 t.reset(new OrthancStone::PanSceneTracker(viewport.GetScene(), *event));
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296 break;
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297
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298 case 2: // Right button
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299 t.reset(new OrthancStone::ZoomSceneTracker
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300 (viewport.GetScene(), *event, viewport.GetCanvasWidth()));
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301 break;
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302
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303 default:
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304 break;
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305 }
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306 }
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307
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308 if (t.get() != NULL)
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309 {
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310 tracker_.reset(new OrthancStone::ActiveTracker(t.release(), viewport));
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311 viewport.Refresh();
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312 }
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313
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314 break;
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315 }
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316
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317 case EMSCRIPTEN_EVENT_MOUSEMOVE:
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318 if (tracker_.get() != NULL)
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319 {
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320 std::auto_ptr<OrthancStone::PointerEvent> event(ConvertMouseEvent(*mouseEvent, viewport));
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321 tracker_->Update(*event);
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322 viewport.Refresh();
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323 }
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324 break;
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325
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326 case EMSCRIPTEN_EVENT_MOUSEUP:
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327 if (tracker_.get() != NULL)
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328 {
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329 tracker_->Release();
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330 viewport.Refresh();
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331 tracker_.reset();
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332 }
617
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333 break;
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334
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335 default:
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336 break;
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337 }
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338 }
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339
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340 return true;
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341 }
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342
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343
618
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344 void OrthancStone::WebAssemblyViewport::SetupEvents(const std::string& canvas)
617
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345 {
631
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diff changeset
346 if (0)
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347 {
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348 emscripten_set_click_callback(canvas.c_str(), this, false, OnMouseEvent);
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349 }
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350 else
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351 {
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352 emscripten_set_mousedown_callback(canvas.c_str(), this, false, OnMouseEvent);
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353 emscripten_set_mousemove_callback(canvas.c_str(), this, false, OnMouseEvent);
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354 emscripten_set_mouseup_callback(canvas.c_str(), this, false, OnMouseEvent);
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355 }
617
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356 }
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357
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358
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359
7efa2543699d simplification
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360
618
0925b27e8750 mouse events in wasm sample
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diff changeset
361 std::auto_ptr<OrthancStone::WebAssemblyViewport> viewport1_;
0925b27e8750 mouse events in wasm sample
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diff changeset
362 std::auto_ptr<OrthancStone::WebAssemblyViewport> viewport2_;
0925b27e8750 mouse events in wasm sample
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diff changeset
363 std::auto_ptr<OrthancStone::WebAssemblyViewport> viewport3_;
616
97926984d5d0 WebAssembly sample using Scene2D
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parents:
diff changeset
364
97926984d5d0 WebAssembly sample using Scene2D
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365
97926984d5d0 WebAssembly sample using Scene2D
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366 EM_BOOL OnWindowResize(int eventType, const EmscriptenUiEvent *uiEvent, void *userData)
97926984d5d0 WebAssembly sample using Scene2D
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367 {
618
0925b27e8750 mouse events in wasm sample
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368 if (viewport1_.get() != NULL)
616
97926984d5d0 WebAssembly sample using Scene2D
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parents:
diff changeset
369 {
618
0925b27e8750 mouse events in wasm sample
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diff changeset
370 viewport1_->UpdateSize();
616
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371 }
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diff changeset
372
618
0925b27e8750 mouse events in wasm sample
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diff changeset
373 if (viewport2_.get() != NULL)
616
97926984d5d0 WebAssembly sample using Scene2D
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parents:
diff changeset
374 {
618
0925b27e8750 mouse events in wasm sample
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diff changeset
375 viewport2_->UpdateSize();
616
97926984d5d0 WebAssembly sample using Scene2D
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parents:
diff changeset
376 }
97926984d5d0 WebAssembly sample using Scene2D
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parents:
diff changeset
377
618
0925b27e8750 mouse events in wasm sample
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diff changeset
378 if (viewport3_.get() != NULL)
616
97926984d5d0 WebAssembly sample using Scene2D
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parents:
diff changeset
379 {
618
0925b27e8750 mouse events in wasm sample
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diff changeset
380 viewport3_->UpdateSize();
616
97926984d5d0 WebAssembly sample using Scene2D
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parents:
diff changeset
381 }
97926984d5d0 WebAssembly sample using Scene2D
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parents:
diff changeset
382
97926984d5d0 WebAssembly sample using Scene2D
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diff changeset
383 return true;
97926984d5d0 WebAssembly sample using Scene2D
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parents:
diff changeset
384 }
97926984d5d0 WebAssembly sample using Scene2D
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parents:
diff changeset
385
97926984d5d0 WebAssembly sample using Scene2D
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parents:
diff changeset
386
97926984d5d0 WebAssembly sample using Scene2D
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parents:
diff changeset
387
97926984d5d0 WebAssembly sample using Scene2D
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parents:
diff changeset
388 extern "C"
97926984d5d0 WebAssembly sample using Scene2D
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parents:
diff changeset
389 {
97926984d5d0 WebAssembly sample using Scene2D
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diff changeset
390 int main(int argc, char const *argv[])
97926984d5d0 WebAssembly sample using Scene2D
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parents:
diff changeset
391 {
97926984d5d0 WebAssembly sample using Scene2D
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parents:
diff changeset
392 OrthancStone::StoneInitialize();
97926984d5d0 WebAssembly sample using Scene2D
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diff changeset
393 EM_ASM(window.dispatchEvent(new CustomEvent("WebAssemblyLoaded")););
97926984d5d0 WebAssembly sample using Scene2D
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parents:
diff changeset
394 }
97926984d5d0 WebAssembly sample using Scene2D
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parents:
diff changeset
395
97926984d5d0 WebAssembly sample using Scene2D
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
396 EMSCRIPTEN_KEEPALIVE
97926984d5d0 WebAssembly sample using Scene2D
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parents:
diff changeset
397 void Initialize()
97926984d5d0 WebAssembly sample using Scene2D
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parents:
diff changeset
398 {
618
0925b27e8750 mouse events in wasm sample
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parents: 617
diff changeset
399 viewport1_.reset(new OrthancStone::WebAssemblyViewport("mycanvas1"));
0925b27e8750 mouse events in wasm sample
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parents: 617
diff changeset
400 PrepareScene(viewport1_->GetScene());
0925b27e8750 mouse events in wasm sample
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parents: 617
diff changeset
401 viewport1_->UpdateSize();
616
97926984d5d0 WebAssembly sample using Scene2D
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
402
618
0925b27e8750 mouse events in wasm sample
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parents: 617
diff changeset
403 viewport2_.reset(new OrthancStone::WebAssemblyViewport("mycanvas2"));
0925b27e8750 mouse events in wasm sample
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 617
diff changeset
404 PrepareScene(viewport2_->GetScene());
0925b27e8750 mouse events in wasm sample
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 617
diff changeset
405 viewport2_->UpdateSize();
616
97926984d5d0 WebAssembly sample using Scene2D
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
406
618
0925b27e8750 mouse events in wasm sample
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 617
diff changeset
407 viewport3_.reset(new OrthancStone::WebAssemblyViewport("mycanvas3"));
0925b27e8750 mouse events in wasm sample
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 617
diff changeset
408 PrepareScene(viewport3_->GetScene());
0925b27e8750 mouse events in wasm sample
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 617
diff changeset
409 viewport3_->UpdateSize();
616
97926984d5d0 WebAssembly sample using Scene2D
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
410
97926984d5d0 WebAssembly sample using Scene2D
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
411 emscripten_set_resize_callback("#window", NULL, false, OnWindowResize);
97926984d5d0 WebAssembly sample using Scene2D
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parents:
diff changeset
412 }
97926984d5d0 WebAssembly sample using Scene2D
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parents:
diff changeset
413 }