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annotate Applications/Samples/WebAssembly/RtViewer/RtViewerWasm.cpp @ 1594:74ed691f9c64

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fix initial rendering of MPR sample
author Sebastien Jodogne <s.jodogne@gmail.com>
date Mon, 26 Oct 2020 15:52:11 +0100
parents 5887a4f8594b
children 4c9e68291467
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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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) 2017-2020 Osimis S.A., Belgium
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6 *
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7 * This program is free software: you can redistribute it and/or
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8 * modify it under the terms of the GNU Affero General Public License
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9 * as published by the Free Software Foundation, either version 3 of
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10 * the License, or (at your option) any later version.
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11 *
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12 * This program is distributed in the hope that it will be useful, but
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13 * WITHOUT ANY WARRANTY; without even the implied warranty of
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14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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15 * Affero General Public License for more details.
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16 *
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17 * You should have received a copy of the GNU Affero General Public License
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18 * along with this program. If not, see <http://www.gnu.org/licenses/>.
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19 **/
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20
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21 #include "../../Common/RtViewerApp.h"
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22 #include "../../Common/RtViewerView.h"
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23 #include "../../Common/SampleHelpers.h"
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24
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25 // Stone of Orthanc includes
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26 #include "../../../../OrthancStone/Sources/StoneException.h"
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27 #include "../../../../OrthancStone/Sources/StoneInitialization.h"
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28 #include "../../../Platforms/WebAssembly/WebAssemblyLoadersContext.h"
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29 #include "../../../Platforms/WebAssembly/WebGLViewport.h"
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31 #include <Toolbox.h>
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32
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33 #include <boost/program_options.hpp>
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34 #include <boost/shared_ptr.hpp>
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35 // #include <boost/pointer_cast.hpp> this include might be necessary in more recent boost versions
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36
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37 #include <emscripten.h>
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38 #include <emscripten/html5.h>
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40
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41 #define DISPATCH_JAVASCRIPT_EVENT(name) \
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42 EM_ASM( \
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43 const customEvent = document.createEvent("CustomEvent"); \
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44 customEvent.initCustomEvent(name, false, false, undefined); \
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45 window.dispatchEvent(customEvent); \
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46 );
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47
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48 #define EXTERN_CATCH_EXCEPTIONS \
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49 catch (Orthanc::OrthancException& e) \
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50 { \
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51 LOG(ERROR) << "OrthancException: " << e.What(); \
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52 DISPATCH_JAVASCRIPT_EVENT("StoneException"); \
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53 } \
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54 catch (OrthancStone::StoneException& e) \
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55 { \
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56 LOG(ERROR) << "StoneException: " << e.What(); \
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57 DISPATCH_JAVASCRIPT_EVENT("StoneException"); \
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58 } \
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59 catch (std::exception& e) \
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60 { \
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61 LOG(ERROR) << "Runtime error: " << e.what(); \
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62 DISPATCH_JAVASCRIPT_EVENT("StoneException"); \
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63 } \
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64 catch (...) \
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65 { \
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66 LOG(ERROR) << "Native exception"; \
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67 DISPATCH_JAVASCRIPT_EVENT("StoneException"); \
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68 }
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69
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70 namespace OrthancStone
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71 {
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72 // typedef EM_BOOL (*OnMouseWheelFunc)(int eventType, const EmscriptenWheelEvent* wheelEvent, void* userData);
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73
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74 EM_BOOL RtViewerView_Scroll(int eventType,
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75 const EmscriptenWheelEvent* wheelEvent,
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76 void* userData)
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77 {
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78 RtViewerView* that = reinterpret_cast<RtViewerView*>(userData);
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79
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80 int delta = 0;
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81 if (wheelEvent->deltaY < 0)
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82 delta = -1;
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83 if (wheelEvent->deltaY > 0)
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84 delta = 1;
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85
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86 that->Scroll(delta);
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87
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88 return 1;
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89 }
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90
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91 boost::shared_ptr<IViewport> RtViewerView::CreateViewport(
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92 const std::string& canvasId)
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93 {
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94 boost::shared_ptr<IViewport> viewport = WebGLViewport::Create(canvasId);
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95
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96 void* userData = reinterpret_cast<void*>(this);
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97
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98 // manually add the mouse wheel handler
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99
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100 std::string selector = "#" + canvasId;
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101
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102 emscripten_set_wheel_callback_on_thread(
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103 selector.c_str(),
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104 userData,
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105 false,
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106 &RtViewerView_Scroll,
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107 EM_CALLBACK_THREAD_CONTEXT_CALLING_THREAD);
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108
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109 return viewport;
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110 }
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111
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112 void RtViewerView::TakeScreenshot(const std::string& target,
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113 unsigned int canvasWidth,
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114 unsigned int canvasHeight)
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115 {
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116 throw Orthanc::OrthancException(Orthanc::ErrorCode_NotImplemented);
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117 }
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118
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119
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120 void RtViewerApp::RunWasm()
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121 {
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122 loadersContext_.reset(new OrthancStone::WebAssemblyLoadersContext(1, 4, 1));
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123
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124 // we are in WASM --> downcast to concrete type
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125 boost::shared_ptr<WebAssemblyLoadersContext> loadersContext =
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126 boost::dynamic_pointer_cast<WebAssemblyLoadersContext>(loadersContext_);
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127
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128 if (HasArgument("orthanc"))
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129 loadersContext->SetLocalOrthanc(GetArgument("orthanc"));
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130 else
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131 loadersContext->SetLocalOrthanc("..");
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132
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133 loadersContext->SetDicomCacheSize(128 * 1024 * 1024); // 128MB
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134
1404
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135 CreateLoaders();
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136
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137 CreateView("RtViewer_Axial", VolumeProjection_Axial);
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138 CreateView("RtViewer_Coronal", VolumeProjection_Coronal);
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139 CreateView("RtViewer_Sagittal", VolumeProjection_Sagittal);
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140
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141 for (size_t i = 0; i < views_.size(); ++i)
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142 {
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143 views_[i]->PrepareViewport();
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144 }
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145
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146 StartLoaders();
1393
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147 }
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148 }
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149
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150 extern "C"
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151 {
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152 boost::shared_ptr<OrthancStone::RtViewerApp> g_app;
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153
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154 int main(int argc, char const *argv[])
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155 {
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156 try
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157 {
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158 OrthancStone::StoneInitialize();
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159 Orthanc::Logging::Initialize();
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160 //Orthanc::Logging::EnableTraceLevel(true);
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161 Orthanc::Logging::EnableInfoLevel(true);
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162
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163 LOG(WARNING) << "Initializing native Stone";
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164
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165 LOG(WARNING) << "Compiled with Emscripten " << __EMSCRIPTEN_major__
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166 << "." << __EMSCRIPTEN_minor__
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167 << "." << __EMSCRIPTEN_tiny__;
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168
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169 LOG(INFO) << "Endianness: " << Orthanc::EnumerationToString(Orthanc::Toolbox::DetectEndianness());
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170
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171 g_app = OrthancStone::RtViewerApp::Create();
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172
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173 DISPATCH_JAVASCRIPT_EVENT("WasmModuleInitialized");
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174 }
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175 EXTERN_CATCH_EXCEPTIONS;
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176 }
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177
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178 EMSCRIPTEN_KEEPALIVE
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179 void Initialize(const char* canvasId)
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180 {
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181 try
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182 {
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183 g_app->RunWasm();
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184 }
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185 EXTERN_CATCH_EXCEPTIONS;
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186 }
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187
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188 EMSCRIPTEN_KEEPALIVE
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189 void SetArgument(const char* key, const char* value)
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190 {
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191 // This is called for each GET argument (cf. "app.js")
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192 LOG(INFO) << "Received GET argument: [" << key << "] = [" << value << "]";
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193 g_app->SetArgument(key, value);
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194 }
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195
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196 }