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annotate Applications/Samples/WebAssembly/RtViewer/RtViewerWasm.cpp @ 1897:144f8f82c15a

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added ctrl key in RtViewerWasm
author Sebastien Jodogne <s.jodogne@gmail.com>
date Wed, 26 Jan 2022 17:28:47 +0100
parents 7053b8a0aaec
children 1cfd602de69d
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) 2017-2022 Osimis S.A., Belgium
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6 * Copyright (C) 2021-2022 Sebastien Jodogne, ICTEAM UCLouvain, Belgium
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7 *
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8 * This program is free software: you can redistribute it and/or
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9 * modify it under the terms of the GNU Affero General Public License
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10 * as published by the Free Software Foundation, either version 3 of
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11 * the License, or (at your option) any later version.
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12 *
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13 * This program is distributed in the hope that it will be useful, but
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14 * WITHOUT ANY WARRANTY; without even the implied warranty of
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15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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16 * Affero General Public License for more details.
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17 *
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18 * You should have received a copy of the GNU Affero General Public License
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19 * along with this program. If not, see <http://www.gnu.org/licenses/>.
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20 **/
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21
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22 #include "../../Common/RtViewerApp.h"
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23 #include "../../Common/RtViewerView.h"
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24 #include "../../Common/SampleHelpers.h"
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26 // Stone of Orthanc includes
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27 #include "../../../../OrthancStone/Sources/StoneException.h"
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28 #include "../../../../OrthancStone/Sources/StoneInitialization.h"
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29 #include "../../../Platforms/WebAssembly/WebAssemblyLoadersContext.h"
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30 #include "../../../Platforms/WebAssembly/WebGLViewport.h"
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31
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32 #include <Toolbox.h>
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33
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34 #include <boost/program_options.hpp>
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35 #include <boost/shared_ptr.hpp>
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36 // #include <boost/pointer_cast.hpp> this include might be necessary in more recent boost versions
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37
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38 #include <emscripten.h>
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39 #include <emscripten/html5.h>
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41
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42 #define DISPATCH_JAVASCRIPT_EVENT(name) \
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43 EM_ASM( \
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44 const customEvent = document.createEvent("CustomEvent"); \
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45 customEvent.initCustomEvent(name, false, false, undefined); \
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46 window.dispatchEvent(customEvent); \
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47 );
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48
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49 #define EXTERN_CATCH_EXCEPTIONS \
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50 catch (Orthanc::OrthancException& e) \
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51 { \
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52 LOG(ERROR) << "OrthancException: " << e.What(); \
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53 DISPATCH_JAVASCRIPT_EVENT("StoneException"); \
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54 } \
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55 catch (OrthancStone::StoneException& e) \
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56 { \
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57 LOG(ERROR) << "StoneException: " << e.What(); \
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58 DISPATCH_JAVASCRIPT_EVENT("StoneException"); \
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59 } \
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60 catch (std::exception& e) \
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61 { \
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62 LOG(ERROR) << "Runtime error: " << e.what(); \
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63 DISPATCH_JAVASCRIPT_EVENT("StoneException"); \
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64 } \
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65 catch (...) \
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66 { \
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67 LOG(ERROR) << "Native exception"; \
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68 DISPATCH_JAVASCRIPT_EVENT("StoneException"); \
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69 }
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70
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71 namespace OrthancStone
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72 {
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73 // typedef EM_BOOL (*OnMouseWheelFunc)(int eventType, const EmscriptenWheelEvent* wheelEvent, void* userData);
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74
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75 EM_BOOL RtViewerView_Scroll(int eventType,
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76 const EmscriptenWheelEvent* wheelEvent,
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77 void* userData)
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78 {
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79 RtViewerView* that = reinterpret_cast<RtViewerView*>(userData);
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80
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81 int delta = 0;
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82 if (wheelEvent->deltaY < 0)
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83 {
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84 delta = -1;
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85 }
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86 else if (wheelEvent->deltaY > 0)
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87 {
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88 delta = 1;
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89 }
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90
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91 if (wheelEvent->mouse.ctrlKey)
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92 {
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93 delta *= 10;
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94 }
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95
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96 that->Scroll(delta);
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97
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98 return 1;
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99 }
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100
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101 boost::shared_ptr<IViewport> RtViewerView::CreateViewport(
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102 const std::string& canvasId)
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103 {
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104 boost::shared_ptr<IViewport> viewport = WebGLViewport::Create(canvasId);
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105
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106 void* userData = reinterpret_cast<void*>(this);
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107
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108 // manually add the mouse wheel handler
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109
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110 std::string selector = "#" + canvasId;
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111
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112 emscripten_set_wheel_callback_on_thread(
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113 selector.c_str(),
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114 userData,
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115 false,
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116 &RtViewerView_Scroll,
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117 EM_CALLBACK_THREAD_CONTEXT_CALLING_THREAD);
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118
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119 return viewport;
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120 }
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121
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122 void RtViewerView::CleanupViewportEvents()
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123 {
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124 void* userData = reinterpret_cast<void*>(this);
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125 std::string selector = "#" + canvasId_;
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126 emscripten_set_wheel_callback_on_thread(
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127 selector.c_str(),
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128 userData,
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129 false,
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130 NULL,
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131 EM_CALLBACK_THREAD_CONTEXT_CALLING_THREAD);
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132 }
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133
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134 void RtViewerView::TakeScreenshot(const std::string& target,
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135 unsigned int canvasWidth,
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136 unsigned int canvasHeight)
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137 {
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138 throw Orthanc::OrthancException(Orthanc::ErrorCode_NotImplemented);
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139 }
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140
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141
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142 void RtViewerApp::RunWasm()
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143 {
1640
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144 loadersContext_.reset(new WebAssemblyLoadersContext(1, 4, 1));
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145
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146 // we are in WASM --> downcast to concrete type
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147 boost::shared_ptr<WebAssemblyLoadersContext> loadersContext =
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148 boost::dynamic_pointer_cast<WebAssemblyLoadersContext>(loadersContext_);
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149
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150 if (HasArgument("orthanc"))
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151 loadersContext->SetLocalOrthanc(GetArgument("orthanc"));
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152 else
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153 loadersContext->SetLocalOrthanc("..");
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154
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155 loadersContext->SetDicomCacheSize(128 * 1024 * 1024); // 128MB
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156
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157 CreateLoaders();
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158
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159 CreateView("RtViewer_Axial", VolumeProjection_Axial);
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160 CreateView("RtViewer_Coronal", VolumeProjection_Coronal);
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161 CreateView("RtViewer_Sagittal", VolumeProjection_Sagittal);
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162
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163 for (size_t i = 0; i < views_.size(); ++i)
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164 {
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165 views_[i]->PrepareViewport();
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166 }
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167
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168 StartLoaders();
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169 }
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170 }
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171
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172 extern "C"
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173 {
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174 boost::shared_ptr<OrthancStone::RtViewerApp> g_app;
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175
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176 int main(int argc, char const *argv[])
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177 {
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178 try
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179 {
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180 OrthancStone::StoneInitialize();
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181 Orthanc::Logging::Initialize();
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182 //Orthanc::Logging::EnableTraceLevel(true);
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183 Orthanc::Logging::EnableInfoLevel(true);
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184
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185 LOG(WARNING) << "Initializing native Stone";
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186
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187 LOG(WARNING) << "Compiled with Emscripten " << __EMSCRIPTEN_major__
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188 << "." << __EMSCRIPTEN_minor__
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189 << "." << __EMSCRIPTEN_tiny__;
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190
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191 LOG(INFO) << "Endianness: " << Orthanc::EnumerationToString(Orthanc::Toolbox::DetectEndianness());
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192
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193 g_app = OrthancStone::RtViewerApp::Create();
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194
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195 DISPATCH_JAVASCRIPT_EVENT("WasmModuleInitialized");
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196 }
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197 EXTERN_CATCH_EXCEPTIONS;
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198 }
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199
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200 EMSCRIPTEN_KEEPALIVE
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201 void Initialize(const char* canvasId)
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202 {
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203 try
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204 {
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205 g_app->RunWasm();
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206 }
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207 EXTERN_CATCH_EXCEPTIONS;
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208 }
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209
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210 EMSCRIPTEN_KEEPALIVE
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211 void SetArgument(const char* key, const char* value)
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212 {
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213 // This is called for each GET argument (cf. "app.js")
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214 LOG(INFO) << "Received GET argument: [" << key << "] = [" << value << "]";
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diff changeset
215 g_app->SetArgument(key, value);
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216 }
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217
27e0a00bd3e8 RtViewer SingleFrameViewer OK : wasm SDL single viewport
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218 }