Mercurial > hg > orthanc-stone
annotate Applications/Platforms/WebAssembly/WebAssemblyOpenGLContext.cpp @ 1761:28755e42c007
Fix issue #197 (Support for passing credentials with all HTTP requests)
author | Sebastien Jodogne <s.jodogne@gmail.com> |
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date | Mon, 10 May 2021 11:51:53 +0200 |
parents | 9ac2a65d4172 |
children | 3889ae96d2e9 |
rev | line source |
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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) 2017-2021 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 |
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22 #include "WebAssemblyOpenGLContext.h" |
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23 |
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24 #include "../../../OrthancStone/Sources/StoneException.h" |
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25 |
1624 | 26 #include <Logging.h> |
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27 #include <OrthancException.h> |
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28 |
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29 #include <emscripten/html5.h> |
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30 #include <emscripten/em_asm.h> |
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31 |
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32 #include <boost/math/special_functions/round.hpp> |
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33 |
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34 namespace OrthancStone |
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35 { |
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36 namespace OpenGL |
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37 { |
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38 class WebAssemblyOpenGLContext::PImpl |
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39 { |
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40 private: |
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41 std::string canvasSelector_; |
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42 EMSCRIPTEN_WEBGL_CONTEXT_HANDLE context_; |
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43 bool isContextLost_; |
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44 |
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45 public: |
1571 | 46 explicit PImpl(const std::string& canvasSelector) : |
47 canvasSelector_(canvasSelector), | |
48 isContextLost_(false) | |
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49 { |
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50 // Context configuration |
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51 EmscriptenWebGLContextAttributes attr; |
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52 emscripten_webgl_init_context_attributes(&attr); |
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53 |
1578 | 54 // The next line might be necessary to print using |
55 // WebGL. Sometimes, if set to "false" (the default value), | |
56 // the canvas was rendered as a fully white or black | |
57 // area. UNCONFIRMED. | |
1575 | 58 attr.preserveDrawingBuffer = true; |
59 | |
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60 context_ = emscripten_webgl_create_context(canvasSelector.c_str(), &attr); |
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61 if (context_ == 0) |
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62 { |
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63 std::string message("Cannot create an OpenGL context for the element with the following CSS selector: \""); |
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64 message += canvasSelector; |
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65 message += "\" Please make sure the -s DISABLE_DEPRECATED_FIND_EVENT_TARGET_BEHAVIOR=1 flag has been passed to Emscripten when building."; |
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66 LOG(ERROR) << message; |
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67 throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError, message); |
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68 } |
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69 } |
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70 |
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71 void* DebugGetInternalContext() const |
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72 { |
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73 return reinterpret_cast<void*>(context_); |
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74 } |
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75 |
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76 bool IsContextLost() |
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77 { |
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78 //LOG(TRACE) << "IsContextLost() for context " << std::hex << context_ << std::dec; |
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79 bool apiFlag = (emscripten_is_webgl_context_lost(context_) != 0); |
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80 isContextLost_ = apiFlag; |
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81 return isContextLost_; |
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82 } |
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83 |
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84 void SetLostContext() |
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85 { |
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86 isContextLost_ = true; |
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87 } |
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88 |
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89 ~PImpl() |
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90 { |
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91 try |
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92 { |
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93 EMSCRIPTEN_RESULT result = emscripten_webgl_destroy_context(context_); |
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94 if (result != EMSCRIPTEN_RESULT_SUCCESS) |
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95 { |
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96 LOG(ERROR) << "emscripten_webgl_destroy_context returned code " << result; |
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97 } |
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98 } |
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99 catch (const Orthanc::OrthancException& e) |
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100 { |
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101 if (e.HasDetails()) |
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102 { |
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103 LOG(ERROR) << "OrthancException in WebAssemblyOpenGLContext::~PImpl: " << e.What() << " Details: " << e.GetDetails(); |
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104 } |
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105 else |
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106 { |
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107 LOG(ERROR) << "OrthancException in WebAssemblyOpenGLContext::~PImpl: " << e.What(); |
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108 } |
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109 } |
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110 catch (const std::exception& e) |
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111 { |
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112 LOG(ERROR) << "std::exception in WebAssemblyOpenGLContext::~PImpl: " << e.what(); |
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113 } |
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114 catch (...) |
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115 { |
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116 LOG(ERROR) << "Unknown exception in WebAssemblyOpenGLContext::~PImpl"; |
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117 } |
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118 } |
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119 |
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120 const std::string& GetCanvasSelector() const |
617 | 121 { |
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122 return canvasSelector_; |
617 | 123 } |
124 | |
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125 void MakeCurrent() |
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126 { |
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127 if (IsContextLost()) |
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128 { |
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129 LOG(ERROR) << "MakeCurrent() called on lost context " << context_; |
1050 | 130 throw StoneException(ErrorCode_WebGLContextLost); |
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131 } |
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132 |
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133 if (emscripten_is_webgl_context_lost(context_)) |
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134 { |
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135 LOG(ERROR) << "OpenGL context has been lost for canvas selector: " << canvasSelector_; |
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136 SetLostContext(); |
1050 | 137 throw StoneException(ErrorCode_WebGLContextLost); |
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138 } |
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139 |
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140 if (emscripten_webgl_make_context_current(context_) != EMSCRIPTEN_RESULT_SUCCESS) |
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141 { |
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142 throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError, |
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143 "Cannot set the OpenGL context"); |
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144 } |
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145 } |
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146 |
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147 void SwapBuffer() |
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148 { |
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149 /** |
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150 * "Rendered WebGL content is implicitly presented (displayed to |
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151 * the user) on the canvas when the event handler that renders with |
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152 * WebGL returns back to the browser event loop." |
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153 * https://emscripten.org/docs/api_reference/html5.h.html#webgl-context |
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154 * |
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155 * Could call "emscripten_webgl_commit_frame()" if |
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156 * "explicitSwapControl" option were set to "true". |
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157 **/ |
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158 } |
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159 }; |
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160 |
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161 |
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162 WebAssemblyOpenGLContext::WebAssemblyOpenGLContext(const std::string& canvasSelector) : |
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163 pimpl_(new PImpl(canvasSelector)) |
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164 { |
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165 } |
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166 |
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167 bool WebAssemblyOpenGLContext::IsContextLost() |
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168 { |
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169 return pimpl_->IsContextLost(); |
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170 } |
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171 |
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172 void WebAssemblyOpenGLContext::SetLostContext() |
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173 { |
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174 pimpl_->SetLostContext(); |
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175 } |
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176 |
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177 void* WebAssemblyOpenGLContext::DebugGetInternalContext() const |
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178 { |
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179 return pimpl_->DebugGetInternalContext(); |
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180 } |
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181 |
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182 void WebAssemblyOpenGLContext::MakeCurrent() |
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183 { |
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184 assert(pimpl_.get() != NULL); |
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185 pimpl_->MakeCurrent(); |
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186 } |
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187 |
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188 void WebAssemblyOpenGLContext::SwapBuffer() |
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189 { |
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190 assert(pimpl_.get() != NULL); |
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191 pimpl_->SwapBuffer(); |
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192 } |
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193 |
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194 const std::string& WebAssemblyOpenGLContext::GetCanvasSelector() const |
617 | 195 { |
196 assert(pimpl_.get() != NULL); | |
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197 return pimpl_->GetCanvasSelector(); |
617 | 198 } |
616
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199 } |
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200 } |