annotate Samples/Sdl/BasicScene.cpp @ 602:03c4b998fcd0

display scene positions in the basic sample
author Sebastien Jodogne <s.jodogne@gmail.com>
date Mon, 29 Apr 2019 14:40:01 +0200
parents 6129b1e5ba42
children f4b37a991dac
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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
6129b1e5ba42 BasicScene SDL sample
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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 *
6129b1e5ba42 BasicScene SDL sample
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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
6129b1e5ba42 BasicScene SDL sample
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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
6129b1e5ba42 BasicScene SDL sample
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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 // From Stone
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23 #include "../../Applications/Sdl/SdlOpenGLWindow.h"
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24 #include "../../Framework/Scene2D/CairoCompositor.h"
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25 #include "../../Framework/Scene2D/OpenGLCompositor.h"
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26 #include "../../Framework/Scene2D/Scene2D.h"
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27 #include "../../Framework/Scene2D/PanSceneTracker.h"
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28 #include "../../Framework/Scene2D/RotateSceneTracker.h"
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29 #include "../../Framework/Scene2D/ZoomSceneTracker.h"
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30 #include "../../Framework/Scene2D/ColorTextureSceneLayer.h"
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31
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32 // From Orthanc framework
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33 #include <Core/Logging.h>
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34 #include <Core/OrthancException.h>
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35 #include <Core/Images/Image.h>
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36 #include <Core/Images/ImageProcessing.h>
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37 #include <Core/Images/PngWriter.h>
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38
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39 #include <SDL.h>
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40 #include <stdio.h>
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41
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42 static const unsigned int FONT_SIZE = 32;
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43 static const int LAYER_POSITION = 150;
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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 {
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52 Orthanc::Image i(Orthanc::PixelFormat_RGB24, 2, 2, false);
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53
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54 uint8_t *p = reinterpret_cast<uint8_t*>(i.GetRow(0));
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55 p[0] = 255;
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56 p[1] = 0;
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57 p[2] = 0;
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58
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59 p[3] = 0;
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60 p[4] = 255;
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61 p[5] = 0;
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62
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63 p = reinterpret_cast<uint8_t*>(i.GetRow(1));
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64 p[0] = 0;
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65 p[1] = 0;
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66 p[2] = 255;
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67
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68 p[3] = 255;
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69 p[4] = 0;
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70 p[5] = 0;
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71
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72 scene.SetLayer(12, new ColorTextureSceneLayer(i));
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73
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74 std::auto_ptr<ColorTextureSceneLayer> l(new ColorTextureSceneLayer(i));
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75 l->SetOrigin(-3, 2);
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76 l->SetPixelSpacing(1.5, 1);
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77 l->SetAngle(20.0 / 180.0 * M_PI);
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78 scene.SetLayer(14, l.release());
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79 }
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80
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81 // Texture of 1x1 size
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82 {
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83 Orthanc::Image i(Orthanc::PixelFormat_RGB24, 1, 1, false);
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84
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85 uint8_t *p = reinterpret_cast<uint8_t*>(i.GetRow(0));
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86 p[0] = 255;
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87 p[1] = 0;
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88 p[2] = 0;
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89
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90 std::auto_ptr<ColorTextureSceneLayer> l(new ColorTextureSceneLayer(i));
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91 l->SetOrigin(-2, 1);
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92 l->SetAngle(20.0 / 180.0 * M_PI);
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93 scene.SetLayer(13, l.release());
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94 }
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95
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96 // Some lines
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97 {
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98 std::auto_ptr<PolylineSceneLayer> layer(new PolylineSceneLayer);
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99
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100 layer->SetThickness(1);
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101
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102 PolylineSceneLayer::Chain chain;
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103 chain.push_back(ScenePoint2D(0 - 0.5, 0 - 0.5));
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104 chain.push_back(ScenePoint2D(0 - 0.5, 2 - 0.5));
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105 chain.push_back(ScenePoint2D(2 - 0.5, 2 - 0.5));
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106 chain.push_back(ScenePoint2D(2 - 0.5, 0 - 0.5));
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107 layer->AddChain(chain, true);
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108
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109 chain.clear();
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110 chain.push_back(ScenePoint2D(-5, -5));
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111 chain.push_back(ScenePoint2D(5, -5));
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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 layer->AddChain(chain, true);
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115
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116 double dy = 1.01;
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117 chain.clear();
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118 chain.push_back(ScenePoint2D(-4, -4));
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119 chain.push_back(ScenePoint2D(4, -4 + dy));
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120 chain.push_back(ScenePoint2D(-4, -4 + 2.0 * dy));
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121 chain.push_back(ScenePoint2D(4, 2));
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122 layer->AddChain(chain, false);
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123
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124 layer->SetColor(0,255, 255);
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125 scene.SetLayer(50, layer.release());
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126 }
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127
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128 // Some text
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129 {
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130 std::auto_ptr<TextSceneLayer> layer(new TextSceneLayer);
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131 layer->SetText("Hello");
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132 scene.SetLayer(100, layer.release());
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133 }
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134 }
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135
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136
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137 void TakeScreenshot(const std::string& target,
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138 const OrthancStone::Scene2D& scene,
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139 unsigned int canvasWidth,
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140 unsigned int canvasHeight)
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141 {
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142 // Take a screenshot, then save it as PNG file
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143 OrthancStone::CairoCompositor compositor(scene, canvasWidth, canvasHeight);
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144 compositor.SetFont(0, Orthanc::EmbeddedResources::UBUNTU_FONT, FONT_SIZE, Orthanc::Encoding_Latin1);
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145 compositor.Refresh();
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146
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147 Orthanc::ImageAccessor canvas;
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148 compositor.GetCanvas().GetReadOnlyAccessor(canvas);
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149
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150 Orthanc::Image png(Orthanc::PixelFormat_RGB24, canvas.GetWidth(), canvas.GetHeight(), false);
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151 Orthanc::ImageProcessing::Convert(png, canvas);
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152
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153 Orthanc::PngWriter writer;
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154 writer.WriteToFile(target, png);
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155 }
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156
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157
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158 void HandleApplicationEvent(OrthancStone::Scene2D& scene,
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159 const SDL_Event& event,
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160 std::auto_ptr<OrthancStone::IPointerTracker>& activeTracker,
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161 unsigned int windowWidth,
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162 unsigned int windowHeight)
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163 {
602
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164 bool hasPositionLayer = false;
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165
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166 if (event.type == SDL_MOUSEMOTION)
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167 {
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168 int scancodeCount = 0;
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169 const uint8_t* keyboardState = SDL_GetKeyboardState(&scancodeCount);
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170
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171 if (activeTracker.get() == NULL &&
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172 SDL_SCANCODE_LCTRL < scancodeCount &&
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173 keyboardState[SDL_SCANCODE_LCTRL])
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174 {
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175 // The "left-ctrl" key is down, while no tracker is present
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176
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177 OrthancStone::PointerEvent e;
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178 e.AddIntegerPosition(event.button.x - static_cast<int>(windowWidth) / 2,
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179 event.button.y - static_cast<int>(windowHeight) / 2);
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180 OrthancStone::ScenePoint2D p = e.GetMainPosition().Apply(scene.GetCanvasToSceneTransform());
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181
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182 char buf[64];
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183 sprintf(buf, "(%0.02f,%0.02f)", p.GetX(), p.GetY());
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184
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185 if (scene.HasLayer(LAYER_POSITION))
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186 {
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187 OrthancStone::TextSceneLayer& layer =
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188 dynamic_cast<OrthancStone::TextSceneLayer&>(scene.GetLayer(LAYER_POSITION));
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189 layer.SetText(buf);
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190 layer.SetPosition(p.GetX(), p.GetY());
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191 }
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192 else
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193 {
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194 std::auto_ptr<OrthancStone::TextSceneLayer> layer(new OrthancStone::TextSceneLayer);
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195 layer->SetColor(0, 255, 0);
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196 layer->SetText(buf);
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197 layer->SetBorder(20);
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198 layer->SetAnchor(OrthancStone::BitmapAnchor_BottomCenter);
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199 layer->SetPosition(p.GetX(), p.GetY());
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200 scene.SetLayer(LAYER_POSITION, layer.release());
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201 }
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202
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203 hasPositionLayer = true;
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204 }
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205 }
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206 else if (event.type == SDL_MOUSEBUTTONDOWN)
600
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207 {
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208 OrthancStone::PointerEvent e;
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209 e.AddIntegerPosition(event.button.x, event.button.y);
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210
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211 switch (event.button.button)
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212 {
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213 case SDL_BUTTON_MIDDLE:
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214 activeTracker.reset(new OrthancStone::PanSceneTracker(scene, e));
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215 break;
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216
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217 case SDL_BUTTON_RIGHT:
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218 activeTracker.reset(new OrthancStone::ZoomSceneTracker
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219 (scene, e, windowWidth, windowHeight));
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220 break;
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221
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222 case SDL_BUTTON_LEFT:
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223 activeTracker.reset(new OrthancStone::RotateSceneTracker
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224 (scene, e, windowWidth, windowHeight));
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225 break;
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226
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227 default:
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228 break;
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229 }
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230 }
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231 else if (event.type == SDL_KEYDOWN &&
6129b1e5ba42 BasicScene SDL sample
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232 event.key.repeat == 0 /* Ignore key bounce */)
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233 {
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234 switch (event.key.keysym.sym)
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235 {
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236 case SDLK_s:
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237 scene.FitContent(windowWidth, windowHeight);
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238 break;
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239
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240 case SDLK_c:
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241 TakeScreenshot("screenshot.png", scene, windowWidth, windowHeight);
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242 break;
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243
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244 default:
6129b1e5ba42 BasicScene SDL sample
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245 break;
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246 }
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247 }
602
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248
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249 if (!hasPositionLayer)
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250 {
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251 scene.DeleteLayer(LAYER_POSITION);
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252 }
600
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253 }
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254
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255
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256 static void GLAPIENTRY
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257 OpenGLMessageCallback(GLenum source,
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258 GLenum type,
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259 GLuint id,
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260 GLenum severity,
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261 GLsizei length,
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262 const GLchar* message,
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263 const void* userParam )
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264 {
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265 if (severity != GL_DEBUG_SEVERITY_NOTIFICATION)
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266 {
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267 fprintf(stderr, "GL CALLBACK: %s type = 0x%x, severity = 0x%x, message = %s\n",
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268 ( type == GL_DEBUG_TYPE_ERROR ? "** GL ERROR **" : "" ),
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269 type, severity, message );
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270 }
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271 }
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272
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273
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274 void Run(OrthancStone::Scene2D& scene)
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275 {
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276 OrthancStone::SdlOpenGLWindow window("Hello", 1024, 768);
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277 scene.FitContent(window.GetCanvasWidth(), window.GetCanvasHeight());
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278
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279 glEnable(GL_DEBUG_OUTPUT);
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280 glDebugMessageCallback(OpenGLMessageCallback, 0 );
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281
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282 OrthancStone::OpenGLCompositor compositor(window, scene);
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283 compositor.SetFont(0, Orthanc::EmbeddedResources::UBUNTU_FONT,
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284 FONT_SIZE, Orthanc::Encoding_Latin1);
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285
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286 std::auto_ptr<OrthancStone::IPointerTracker> tracker;
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287
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288 bool stop = false;
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289 while (!stop)
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290 {
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291 compositor.Refresh();
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292
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293 SDL_Event event;
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294 while (!stop &&
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295 SDL_PollEvent(&event))
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296 {
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297 if (event.type == SDL_QUIT)
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298 {
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299 stop = true;
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300 break;
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301 }
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302 else if (event.type == SDL_MOUSEMOTION)
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303 {
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304 if (tracker.get() != NULL)
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305 {
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306 OrthancStone::PointerEvent e;
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307 e.AddIntegerPosition(event.button.x, event.button.y);
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308 tracker->Update(e);
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309 }
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310 }
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311 else if (event.type == SDL_MOUSEBUTTONUP)
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312 {
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313 if (tracker.get() != NULL)
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314 {
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315 tracker->Release();
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316 tracker.reset(NULL);
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317 }
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318 }
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319 else if (event.type == SDL_WINDOWEVENT &&
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320 event.window.event == SDL_WINDOWEVENT_SIZE_CHANGED)
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321 {
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322 tracker.reset(NULL);
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323 compositor.UpdateSize();
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324 }
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325 else if (event.type == SDL_KEYDOWN &&
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326 event.key.repeat == 0 /* Ignore key bounce */)
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327 {
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328 switch (event.key.keysym.sym)
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329 {
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330 case SDLK_f:
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331 window.GetWindow().ToggleMaximize();
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332 break;
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333
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334 case SDLK_q:
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335 stop = true;
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336 break;
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337
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338 default:
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339 break;
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340 }
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341 }
602
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342
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343 HandleApplicationEvent(scene, event, tracker, window.GetCanvasWidth(), window.GetCanvasHeight());
600
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344 }
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345
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346 SDL_Delay(1);
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347 }
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348 }
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349
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350
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351 int main()
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352 {
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353 Orthanc::Logging::Initialize();
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354 OrthancStone::SdlWindow::GlobalInitialize();
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355
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356 try
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357 {
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358 OrthancStone::Scene2D scene;
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359 PrepareScene(scene);
6129b1e5ba42 BasicScene SDL sample
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360 Run(scene);
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361 }
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362 catch (Orthanc::OrthancException& e)
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363 {
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364 LOG(ERROR) << "EXCEPTION: " << e.What();
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365 }
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366
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367 OrthancStone::SdlWindow::GlobalFinalize();
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368 Orthanc::Logging::Finalize();
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369
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370 return 0;
6129b1e5ba42 BasicScene SDL sample
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371 }