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annotate Samples/WebAssembly/RtViewer/RtViewerWasm.cpp @ 1393:27e0a00bd3e8

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RtViewer SingleFrameViewer OK : wasm SDL single viewport other viewports ongoing
author Benjamin Golinvaux <bgo@osimis.io>
date Wed, 29 Apr 2020 15:54:18 +0200
parents 24bcff8ea58f
children 3e644f6fadd4
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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 "RtViewer.h"
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22 #include "SampleHelpers.h"
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23
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24 // Stone of Orthanc includes
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25 #include <Framework/Loaders/WebAssemblyLoadersContext.h>
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26 //#include <Framework/OpenGL/WebAssemblyOpenGLContext.h>
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27 #include <Framework/Viewport/WebGLViewport.h>
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28 #include <Framework/StoneException.h>
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29 #include <Framework/StoneInitialization.h>
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30
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31 #include <Framework/Loaders/WebAssemblyLoadersContext.h>
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32
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33 #include <Framework/StoneException.h>
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34 #include <Framework/StoneInitialization.h>
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35
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36 #include <Core/Toolbox.h>
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37
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38 #include <boost/program_options.hpp>
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39 #include <boost/shared_ptr.hpp>
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40 // #include <boost/pointer_cast.hpp> this include might be necessary in more recent boost versions
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41
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42 #include <emscripten.h>
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43 #include <emscripten/html5.h>
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44
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45
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46 #define DISPATCH_JAVASCRIPT_EVENT(name) \
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47 EM_ASM( \
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48 const customEvent = document.createEvent("CustomEvent"); \
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49 customEvent.initCustomEvent(name, false, false, undefined); \
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50 window.dispatchEvent(customEvent); \
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51 );
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52
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53 #define EXTERN_CATCH_EXCEPTIONS \
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54 catch (Orthanc::OrthancException& e) \
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55 { \
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56 LOG(ERROR) << "OrthancException: " << e.What(); \
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57 DISPATCH_JAVASCRIPT_EVENT("StoneException"); \
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58 } \
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59 catch (OrthancStone::StoneException& e) \
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60 { \
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61 LOG(ERROR) << "StoneException: " << e.What(); \
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62 DISPATCH_JAVASCRIPT_EVENT("StoneException"); \
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63 } \
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64 catch (std::exception& e) \
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65 { \
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66 LOG(ERROR) << "Runtime error: " << e.what(); \
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67 DISPATCH_JAVASCRIPT_EVENT("StoneException"); \
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68 } \
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69 catch (...) \
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70 { \
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71 LOG(ERROR) << "Native exception"; \
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72 DISPATCH_JAVASCRIPT_EVENT("StoneException"); \
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73 }
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74
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75 namespace OrthancStone
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76 {
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77 void RtViewerApp::CreateViewport()
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78 {
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79 viewport_ = WebGLViewport::Create("mycanvas1");
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80 }
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81
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82 void RtViewerApp::TakeScreenshot(const std::string& target,
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83 unsigned int canvasWidth,
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84 unsigned int canvasHeight)
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85 {
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86 throw Orthanc::OrthancException(Orthanc::ErrorCode_NotImplemented);
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87 }
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88
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89
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90 void RtViewerApp::RunWasm()
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91 {
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92 {
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93 std::unique_ptr<IViewport::ILock> lock(viewport_->Lock());
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94 ViewportController& controller = lock->GetController();
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95 Scene2D& scene = controller.GetScene();
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96 ICompositor& compositor = lock->GetCompositor();
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97
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98 controller.FitContent(compositor.GetCanvasWidth(), compositor.GetCanvasHeight());
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99
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100 compositor.SetFont(0, Orthanc::EmbeddedResources::UBUNTU_FONT,
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101 FONT_SIZE_0, Orthanc::Encoding_Latin1);
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102 compositor.SetFont(1, Orthanc::EmbeddedResources::UBUNTU_FONT,
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103 FONT_SIZE_1, Orthanc::Encoding_Latin1);
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104 }
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105
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106 loadersContext_.reset(new OrthancStone::WebAssemblyLoadersContext(1, 4, 1));
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107
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108 // we are in WASM --> downcast to concrete type
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109 boost::shared_ptr<WebAssemblyLoadersContext> loadersContext =
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110 boost::dynamic_pointer_cast<WebAssemblyLoadersContext>(loadersContext_);
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111
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112 if (HasArgument("orthanc"))
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113 loadersContext->SetLocalOrthanc(GetArgument("orthanc"));
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114 else
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115 loadersContext->SetLocalOrthanc("..");
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116
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117 loadersContext->SetDicomCacheSize(128 * 1024 * 1024); // 128MB
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118
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119 PrepareLoadersAndSlicers();
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120
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121 DefaultViewportInteractor interactor;
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122 }
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123 }
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124
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125 extern "C"
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126 {
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127 boost::shared_ptr<OrthancStone::RtViewerApp> g_app;
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128
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129 int main(int argc, char const *argv[])
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130 {
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131 try
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132 {
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133 OrthancStone::StoneInitialize();
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134 Orthanc::Logging::Initialize();
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135 Orthanc::Logging::EnableTraceLevel(true);
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136
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137 LOG(WARNING) << "Initializing native Stone";
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138
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139 LOG(WARNING) << "Compiled with Emscripten " << __EMSCRIPTEN_major__
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140 << "." << __EMSCRIPTEN_minor__
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141 << "." << __EMSCRIPTEN_tiny__;
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142
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143 LOG(INFO) << "Endianness: " << Orthanc::EnumerationToString(Orthanc::Toolbox::DetectEndianness());
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144
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145 g_app = OrthancStone::RtViewerApp::Create();
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146
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147 DISPATCH_JAVASCRIPT_EVENT("WasmModuleInitialized");
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148 }
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149 EXTERN_CATCH_EXCEPTIONS;
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150 }
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151
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152 EMSCRIPTEN_KEEPALIVE
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153 void Initialize(const char* canvasId)
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154 {
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155 try
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156 {
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157 g_app->RunWasm();
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158 }
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159 EXTERN_CATCH_EXCEPTIONS;
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160 }
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161
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162 EMSCRIPTEN_KEEPALIVE
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163 void SetArgument(const char* key, const char* value)
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164 {
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165 // This is called for each GET argument (cf. "app.js")
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166 LOG(INFO) << "Received GET argument: [" << key << "] = [" << value << "]";
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167 g_app->SetArgument(key, value);
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168 }
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169
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170 }