Mercurial > hg > orthanc-stone
annotate Applications/Sdl/SdlOpenGLContext.cpp @ 1037:4e713ef78a5a
fix
author | Sebastien Jodogne <s.jodogne@gmail.com> |
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date | Mon, 07 Oct 2019 18:01:03 +0200 |
parents | a7351ad54960 |
children | 6a9300ecfa13 |
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) 2017-2019 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 "SdlOpenGLContext.h" |
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23 #include "../../Framework/StoneException.h" |
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24 |
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25 #if ORTHANC_ENABLE_SDL == 1 |
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26 |
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27 #if !defined(ORTHANC_ENABLE_GLEW) |
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28 # error Macro ORTHANC_ENABLE_GLEW must be defined |
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29 #endif |
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30 |
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31 #if ORTHANC_ENABLE_GLEW == 1 |
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32 # include <GL/glew.h> |
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33 #endif |
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34 |
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35 #include <Core/OrthancException.h> |
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36 |
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37 namespace OrthancStone |
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38 { |
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39 SdlOpenGLContext::SdlOpenGLContext(const char* title, |
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40 unsigned int width, |
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41 unsigned int height, |
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42 bool allowDpiScaling) |
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43 : window_(title, width, height, true /* enable OpenGL */, allowDpiScaling) |
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44 , context_(NULL) |
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45 , contextLost_(false) |
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46 { |
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47 context_ = SDL_GL_CreateContext(window_.GetObject()); |
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48 |
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49 if (context_ == NULL) |
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50 { |
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51 throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError, |
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52 "Cannot initialize OpenGL"); |
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53 } |
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54 |
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55 #if ORTHANC_ENABLE_GLEW == 1 |
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56 // The initialization function of glew (i.e. "glewInit()") can |
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57 // only be called once an OpenGL is setup. |
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58 // https://stackoverflow.com/a/45033669/881731 |
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59 { |
614 | 60 static boost::mutex mutex_; |
61 static bool isGlewInitialized_ = false; | |
62 | |
63 boost::mutex::scoped_lock lock(mutex_); | |
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64 |
614 | 65 if (!isGlewInitialized_) |
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66 { |
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67 LOG(INFO) << "Initializing glew"; |
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68 |
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69 GLenum err = glewInit(); |
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70 if (GLEW_OK != err) |
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71 { |
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72 throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError, |
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73 "Cannot initialize glew"); |
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74 } |
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75 |
614 | 76 isGlewInitialized_ = true; |
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77 } |
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78 } |
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79 #endif |
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80 } |
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81 |
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82 |
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83 SdlOpenGLContext::~SdlOpenGLContext() |
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84 { |
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85 SDL_GL_DeleteContext(context_); |
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86 } |
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87 |
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88 |
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89 bool SdlOpenGLContext::IsContextLost() |
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90 { |
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91 return contextLost_; |
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92 } |
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93 |
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94 void SdlOpenGLContext::SetLostContext() |
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95 { |
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96 contextLost_ = true; |
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97 } |
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98 |
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99 void SdlOpenGLContext::RestoreLostContext() |
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100 { |
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101 contextLost_ = false; |
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102 } |
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103 |
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104 // extern bool Debug_MustContextBeKilled(std::string title); |
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105 // extern void Debug_Context_ClearKillFlag(std::string title); |
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106 |
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107 void SdlOpenGLContext::MakeCurrent() |
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108 { |
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109 if (IsContextLost()) |
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110 throw OpenGLContextLostException(context_); |
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111 |
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112 // <DEBUG STUFF> |
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113 // This is used for context loss simulation |
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114 // SDL_Window* internalWindow = GetWindow().GetObject(); |
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115 // std::string title(SDL_GetWindowTitle(internalWindow)); |
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116 |
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117 // if (Debug_MustContextBeKilled(title)) |
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118 // { |
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119 // Debug_Context_ClearKillFlag(title); |
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120 // SetLostContext(); |
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121 // throw OpenGLContextLostException(context_); |
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122 // } |
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123 // </DEBUG STUFF> |
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124 |
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125 if (SDL_GL_MakeCurrent(window_.GetObject(), context_) != 0) |
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126 { |
947
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127 const char* errText = SDL_GetError(); |
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128 std::stringstream ss; |
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129 ss << "Cannot set current OpenGL context. SDL error text: " << errText; |
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130 std::string errStr = ss.str(); |
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131 throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError, errStr.c_str()); |
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132 } |
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133 |
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134 // This makes our buffer swap synchronized with the monitor's vertical refresh |
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135 SDL_GL_SetSwapInterval(1); |
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136 } |
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137 |
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138 |
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139 void SdlOpenGLContext::SwapBuffer() |
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140 { |
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141 // Swap our buffer to display the current contents of buffer on screen |
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142 SDL_GL_SwapWindow(window_.GetObject()); |
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143 } |
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144 |
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145 |
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146 unsigned int SdlOpenGLContext::GetCanvasWidth() const |
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147 { |
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148 int w = 0; |
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149 SDL_GL_GetDrawableSize(window_.GetObject(), &w, NULL); |
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150 return static_cast<unsigned int>(w); |
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151 } |
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152 |
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153 |
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154 unsigned int SdlOpenGLContext::GetCanvasHeight() const |
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155 { |
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156 int h = 0; |
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157 SDL_GL_GetDrawableSize(window_.GetObject(), NULL, &h); |
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158 return static_cast<unsigned int>(h); |
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159 } |
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160 } |
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161 |
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162 #endif |