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annotate Samples/WebAssembly/RtViewer/RtViewerWasm.cpp @ 1404:3e644f6fadd4

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Three-viewport is now OK in SDL and Wasm
author Benjamin Golinvaux <bgo@osimis.io>
date Wed, 29 Apr 2020 22:06:24 +0200
parents 27e0a00bd3e8
children 5d7ee14dc1eb
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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 "RtViewerApp.h"
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22 #include "RtViewerView.h"
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23 #include "SampleHelpers.h"
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24
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25 // Stone of Orthanc includes
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26 #include <Framework/Loaders/WebAssemblyLoadersContext.h>
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27 //#include <Framework/OpenGL/WebAssemblyOpenGLContext.h>
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28 #include <Framework/Viewport/WebGLViewport.h>
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29 #include <Framework/StoneException.h>
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30 #include <Framework/StoneInitialization.h>
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31
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32 #include <Framework/Loaders/WebAssemblyLoadersContext.h>
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33
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34 #include <Framework/StoneException.h>
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35 #include <Framework/StoneInitialization.h>
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36
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37 #include <Core/Toolbox.h>
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38
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39 #include <boost/program_options.hpp>
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40 #include <boost/shared_ptr.hpp>
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41 // #include <boost/pointer_cast.hpp> this include might be necessary in more recent boost versions
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42
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43 #include <emscripten.h>
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44 #include <emscripten/html5.h>
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45
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46
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47 #define DISPATCH_JAVASCRIPT_EVENT(name) \
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48 EM_ASM( \
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49 const customEvent = document.createEvent("CustomEvent"); \
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50 customEvent.initCustomEvent(name, false, false, undefined); \
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51 window.dispatchEvent(customEvent); \
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52 );
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53
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54 #define EXTERN_CATCH_EXCEPTIONS \
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55 catch (Orthanc::OrthancException& e) \
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56 { \
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57 LOG(ERROR) << "OrthancException: " << e.What(); \
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58 DISPATCH_JAVASCRIPT_EVENT("StoneException"); \
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59 } \
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60 catch (OrthancStone::StoneException& e) \
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61 { \
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62 LOG(ERROR) << "StoneException: " << e.What(); \
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63 DISPATCH_JAVASCRIPT_EVENT("StoneException"); \
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64 } \
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65 catch (std::exception& e) \
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66 { \
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67 LOG(ERROR) << "Runtime error: " << e.what(); \
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68 DISPATCH_JAVASCRIPT_EVENT("StoneException"); \
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69 } \
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70 catch (...) \
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71 { \
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72 LOG(ERROR) << "Native exception"; \
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73 DISPATCH_JAVASCRIPT_EVENT("StoneException"); \
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74 }
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75
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76 namespace OrthancStone
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77 {
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78 boost::shared_ptr<IViewport> RtViewerView::CreateViewport(
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79 const std::string& canvasId)
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80 {
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81 return WebGLViewport::Create(canvasId);
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82 }
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83
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84 void RtViewerView::TakeScreenshot(const std::string& target,
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85 unsigned int canvasWidth,
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86 unsigned int canvasHeight)
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87 {
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88 throw Orthanc::OrthancException(Orthanc::ErrorCode_NotImplemented);
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89 }
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90
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91
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92 void RtViewerApp::RunWasm()
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93 {
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94 loadersContext_.reset(new OrthancStone::WebAssemblyLoadersContext(1, 4, 1));
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95
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96 // we are in WASM --> downcast to concrete type
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97 boost::shared_ptr<WebAssemblyLoadersContext> loadersContext =
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98 boost::dynamic_pointer_cast<WebAssemblyLoadersContext>(loadersContext_);
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99
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100 if (HasArgument("orthanc"))
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101 loadersContext->SetLocalOrthanc(GetArgument("orthanc"));
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102 else
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103 loadersContext->SetLocalOrthanc("..");
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104
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105 loadersContext->SetDicomCacheSize(128 * 1024 * 1024); // 128MB
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106
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107 CreateLoaders();
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108
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109 CreateView("RtViewer_Axial", VolumeProjection_Axial);
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110 CreateView("RtViewer_Coronal", VolumeProjection_Coronal);
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111 CreateView("RtViewer_Sagittal", VolumeProjection_Sagittal);
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112
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113 for (size_t i = 0; i < views_.size(); ++i)
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114 {
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115 views_[i]->PrepareViewport();
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116 }
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117
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118 StartLoaders();
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119
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120 DefaultViewportInteractor interactor;
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121 }
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122 }
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123
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124 extern "C"
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125 {
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126 boost::shared_ptr<OrthancStone::RtViewerApp> g_app;
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127
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128 int main(int argc, char const *argv[])
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129 {
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130 try
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131 {
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132 OrthancStone::StoneInitialize();
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133 Orthanc::Logging::Initialize();
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134 Orthanc::Logging::EnableTraceLevel(true);
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135
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136 LOG(WARNING) << "Initializing native Stone";
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137
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138 LOG(WARNING) << "Compiled with Emscripten " << __EMSCRIPTEN_major__
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139 << "." << __EMSCRIPTEN_minor__
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140 << "." << __EMSCRIPTEN_tiny__;
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141
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142 LOG(INFO) << "Endianness: " << Orthanc::EnumerationToString(Orthanc::Toolbox::DetectEndianness());
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143
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144 g_app = OrthancStone::RtViewerApp::Create();
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145
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146 DISPATCH_JAVASCRIPT_EVENT("WasmModuleInitialized");
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147 }
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148 EXTERN_CATCH_EXCEPTIONS;
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149 }
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150
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151 EMSCRIPTEN_KEEPALIVE
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152 void Initialize(const char* canvasId)
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153 {
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154 try
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155 {
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156 g_app->RunWasm();
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157 }
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158 EXTERN_CATCH_EXCEPTIONS;
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159 }
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160
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161 EMSCRIPTEN_KEEPALIVE
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162 void SetArgument(const char* key, const char* value)
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163 {
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164 // This is called for each GET argument (cf. "app.js")
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165 LOG(INFO) << "Received GET argument: [" << key << "] = [" << value << "]";
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166 g_app->SetArgument(key, value);
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167 }
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168
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169 }