annotate Applications/Platforms/Sdl/SdlWindow.cpp @ 1836:5a6adbc20ace

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author Sebastien Jodogne <s.jodogne@gmail.com>
date Sat, 12 Jun 2021 13:43:42 +0200
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children 3889ae96d2e9
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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 "SdlWindow.h"
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23
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24 #if ORTHANC_ENABLE_SDL == 1
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25
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26 #include <Logging.h>
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27 #include <OrthancException.h>
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29 #ifdef WIN32
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30 #include <windows.h> // for SetProcessDpiAware
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31 #endif
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32 // WIN32
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33
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34 #include <SDL_render.h>
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35 #include <SDL_video.h>
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36 #include <SDL.h>
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37
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38 namespace OrthancStone
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39 {
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40 SdlWindow::SdlWindow(const std::string& title,
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41 unsigned int width,
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42 unsigned int height,
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43 bool enableOpenGl,
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44 bool allowDpiScaling) :
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45 maximized_(false)
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46 {
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47 // TODO Understand why, with SDL_WINDOW_OPENGL + MinGW32 + Release
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48 // build mode, the application crashes whenever the SDL window is
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49 // resized or maximized
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50
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51 uint32_t windowFlags, rendererFlags;
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52 if (enableOpenGl)
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53 {
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54 windowFlags = SDL_WINDOW_OPENGL | SDL_WINDOW_RESIZABLE;
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55 rendererFlags = SDL_RENDERER_ACCELERATED;
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56 }
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57 else
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58 {
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59 windowFlags = SDL_WINDOW_RESIZABLE;
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60 rendererFlags = SDL_RENDERER_SOFTWARE;
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61 }
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63 // TODO: probably required on MacOS X, too
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64 #if defined(WIN32) && (_WIN32_WINNT >= 0x0600)
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65 if (!allowDpiScaling)
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66 {
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67 // if we do NOT allow DPI scaling, it means an SDL pixel will be a real
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68 // monitor pixel. This is needed for high-DPI applications
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70 // Enable high-DPI support on Windows
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72 // THE FOLLOWING HAS BEEN COMMENTED OUT BECAUSE IT WILL CRASH UNDER
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73 // OLD WINDOWS VERSIONS
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74 // ADD THIS AT THE TOP TO ENABLE IT:
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75 //
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76 //#pragma comment(lib, "Shcore.lib") THIS IS ONLY REQUIRED FOR SetProcessDpiAwareness
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77 //#include <windows.h>
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78 //#include <ShellScalingAPI.h> THIS IS ONLY REQUIRED FOR SetProcessDpiAwareness
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79 //#include <comdef.h> THIS IS ONLY REQUIRED FOR SetProcessDpiAwareness
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80 // SetProcessDpiAwareness(PROCESS_PER_MONITOR_DPI_AWARE);
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81
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82 // This is supported on Vista+
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83 SetProcessDPIAware();
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84
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85 windowFlags |= SDL_WINDOW_ALLOW_HIGHDPI;
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86 }
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87 #endif
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88 // WIN32
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89
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90 window_ = SDL_CreateWindow(title.c_str(),
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91 SDL_WINDOWPOS_UNDEFINED,
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92 SDL_WINDOWPOS_UNDEFINED,
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93 width, height, windowFlags);
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94
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95 if (window_ == NULL)
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96 {
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97 LOG(ERROR) << "Cannot create the SDL window: " << SDL_GetError();
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98 throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError);
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99 }
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100
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101 renderer_ = SDL_CreateRenderer(window_, -1, rendererFlags);
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102 if (!renderer_)
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103 {
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104 LOG(ERROR) << "Cannot create the SDL renderer: " << SDL_GetError();
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105 SDL_DestroyWindow(window_);
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106 throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError);
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107 }
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108 }
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109
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110
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111 SdlWindow::~SdlWindow()
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112 {
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113 if (renderer_ != NULL)
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114 {
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115 SDL_DestroyRenderer(renderer_);
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116 }
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117
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118 if (window_ != NULL)
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119 {
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120 SDL_DestroyWindow(window_);
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121 }
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122 }
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123
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124
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125 unsigned int SdlWindow::GetWidth() const
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126 {
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127 int w = -1;
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128 SDL_GetWindowSize(window_, &w, NULL);
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129
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130 if (w < 0)
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131 {
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132 throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError);
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133 }
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134 else
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135 {
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136 return static_cast<unsigned int>(w);
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137 }
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138 }
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139
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140
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141 unsigned int SdlWindow::GetHeight() const
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142 {
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143 int h = -1;
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144 SDL_GetWindowSize(window_, NULL, &h);
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145
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146 if (h < 0)
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147 {
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148 throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError);
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149 }
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150 else
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151 {
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152 return static_cast<unsigned int>(h);
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153 }
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154 }
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155
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156
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157 void SdlWindow::Render(SDL_Surface* surface)
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158 {
1205
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159 /**
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160 * "You are strongly encouraged to call SDL_RenderClear() to
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161 * initialize the backbuffer before starting each new frame's
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162 * drawing, even if you plan to overwrite every pixel."
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163 * https://wiki.libsdl.org/SDL_RenderPresent
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164 **/
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165 SDL_SetRenderDrawColor(renderer_, 0, 0, 0, 255);
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166 SDL_RenderClear(renderer_); // Clear the entire screen to our selected color
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167
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168 SDL_Texture *texture = SDL_CreateTextureFromSurface(renderer_, surface);
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169 if (texture != NULL)
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170 {
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171 SDL_RenderCopy(renderer_, texture, NULL, NULL);
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172 SDL_DestroyTexture(texture);
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173 }
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174
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175 SDL_RenderPresent(renderer_);
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176 }
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177
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178
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179 void SdlWindow::ToggleMaximize()
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180 {
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181 if (maximized_)
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182 {
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183 SDL_RestoreWindow(window_);
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184 maximized_ = false;
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185 }
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186 else
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187 {
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188 SDL_MaximizeWindow(window_);
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189 maximized_ = true;
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190 }
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191 }
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192
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193
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194 void SdlWindow::GlobalInitialize()
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195 {
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196 if (SDL_Init(SDL_INIT_VIDEO) != 0)
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197 {
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198 LOG(ERROR) << "Cannot initialize SDL";
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199 throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError);
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200 }
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201 }
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202
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203
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204 void SdlWindow::GlobalFinalize()
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205 {
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206 SDL_Quit();
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207 }
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208 }
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209
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210 #endif