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annotate Applications/Platforms/Sdl/SdlViewport.cpp @ 1868:87de32ac3ea7

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author Sebastien Jodogne <s.jodogne@gmail.com>
date Tue, 11 Jan 2022 10:45:58 +0100
parents 5a872e69c74f
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 #include "SdlViewport.h"
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22
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23 #include "../../../OrthancStone/Sources/Scene2DViewport/ViewportController.h"
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24
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25 #include <OrthancException.h>
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26
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27 #include <boost/make_shared.hpp>
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28
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29 namespace OrthancStone
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30 {
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31 ICompositor& SdlViewport::SdlLock::GetCompositor()
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32 {
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33 if (that_.compositor_.get() == NULL)
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34 {
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35 // The derived class should have called "AcquireCompositor()"
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36 throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError);
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37 }
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38 else
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39 {
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40 return *that_.compositor_;
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41 }
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42 }
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43
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44
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45 void SdlViewport::AcquireCompositor(ICompositor* compositor /* takes ownership */)
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46 {
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47 if (compositor == NULL)
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48 {
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49 throw Orthanc::OrthancException(Orthanc::ErrorCode_NullPointer);
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50 }
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51
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52 compositor_.reset(compositor);
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53 }
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54
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55
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56 SdlViewport::SdlViewport()
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57 {
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58 refreshEvent_ = SDL_RegisterEvents(1);
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59
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60 if (refreshEvent_ == static_cast<uint32_t>(-1))
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61 {
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62 throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError);
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63 }
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64 }
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65
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66 void SdlViewport::PostConstructor()
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67 {
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68 controller_ = boost::make_shared<ViewportController>(shared_from_this());
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69 }
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70
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71 void SdlViewport::SendRefreshEvent()
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72 {
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73 SDL_Event event;
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74 SDL_memset(&event, 0, sizeof(event));
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75 event.type = refreshEvent_;
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76 SDL_PushEvent(&event); // This function is thread-safe, and can be called from other threads safely.
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77 }
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78
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79
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80 void SdlViewport::UpdateSize(unsigned int width, unsigned int height)
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81 {
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82 SdlLock lock(*this);
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83 lock.GetCompositor().SetCanvasSize(width, height);
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84 lock.Invalidate();
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85 }
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86
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87
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88 #if ORTHANC_ENABLE_OPENGL == 1
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89 SdlOpenGLViewport::SdlOpenGLViewport(const std::string& title,
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90 unsigned int width,
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91 unsigned int height,
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92 bool allowDpiScaling) :
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93 context_(title.c_str(), width, height, allowDpiScaling)
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94 {
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95 AcquireCompositor(new OpenGLCompositor(context_)); // (*)
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96 }
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97 #endif
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98
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99
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100 #if ORTHANC_ENABLE_OPENGL == 1
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101 void SdlOpenGLViewport::RefreshCanvasSize()
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102 {
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103 UpdateSize(context_.GetCanvasWidth(), context_.GetCanvasHeight());
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104 }
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105 #endif
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106
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107
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108 #if ORTHANC_ENABLE_OPENGL == 1
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109 boost::shared_ptr<SdlOpenGLViewport> SdlOpenGLViewport::Create(const std::string& title,
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110 unsigned int width,
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111 unsigned int height,
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112 bool allowDpiScaling)
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113 {
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114 boost::shared_ptr<SdlOpenGLViewport> that =
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115 boost::shared_ptr<SdlOpenGLViewport>(new SdlOpenGLViewport(title, width, height, allowDpiScaling));
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116 that->SdlViewport::PostConstructor();
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117 return that;
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118 }
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119 #endif
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120
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121
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122 #if ORTHANC_ENABLE_OPENGL == 1
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123 uint32_t SdlOpenGLViewport::GetSdlWindowId()
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124 {
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125 const SdlWindow& sdlWindowWrapper = context_.GetWindow();
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126 SDL_Window* sdlWindow = sdlWindowWrapper.GetObject();
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127 Uint32 sdlWindowId = SDL_GetWindowID(sdlWindow);
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128 return sdlWindowId;
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129 }
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130 #endif
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131
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132
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133 #if ORTHANC_ENABLE_OPENGL == 1
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134 SdlOpenGLViewport::~SdlOpenGLViewport()
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135 {
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136 // Make sure that the "OpenGLCompositor" is destroyed BEFORE the
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137 // "OpenGLContext" it references (*)
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138 ClearCompositor();
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139 }
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140 #endif
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141
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142
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143 #if ORTHANC_ENABLE_OPENGL == 1
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144 void SdlOpenGLViewport::Paint()
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145 {
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146 SdlLock lock(*this);
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147 lock.GetCompositor().Refresh(lock.GetController().GetScene());
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148 }
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149 #endif
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150
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151
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152 #if ORTHANC_ENABLE_OPENGL == 1
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153 void SdlOpenGLViewport::ToggleMaximize()
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154 {
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155 // No need to call "Invalidate()" here, as "UpdateSize()" will
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156 // be invoked after event "SDL_WINDOWEVENT_SIZE_CHANGED"
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157 SdlLock lock(*this);
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158 context_.ToggleMaximize();
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159 }
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160 #endif
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161
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162
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163 void SdlCairoViewport::RefreshCanvasSize()
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164 {
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165 UpdateSize(window_.GetWidth(), window_.GetHeight());
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166 }
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167
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168 SdlCairoViewport::SdlCairoViewport(const std::string& title,
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169 unsigned int width,
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170 unsigned int height,
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171 bool allowDpiScaling) :
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172 window_(title, width, height, false /* enable OpenGL */, allowDpiScaling),
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173 sdlSurface_(NULL)
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174 {
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175 AcquireCompositor(new CairoCompositor(width, height));
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176 }
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177
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178 SdlCairoViewport::~SdlCairoViewport()
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179 {
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180 if (sdlSurface_)
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181 {
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182 SDL_FreeSurface(sdlSurface_);
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183 }
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184 }
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185
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186 uint32_t SdlCairoViewport::GetSdlWindowId()
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187 {
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188 SDL_Window* sdlWindow = window_.GetObject();
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189 Uint32 sdlWindowId = SDL_GetWindowID(sdlWindow);
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190 return sdlWindowId;
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191 }
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192
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193 void SdlCairoViewport::Paint()
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194 {
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195 SdlLock lock(*this);
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196
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197 lock.GetCompositor().Refresh(lock.GetController().GetScene());
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198 CreateSdlSurfaceFromCompositor(dynamic_cast<CairoCompositor&>(lock.GetCompositor()));
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199
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200 if (sdlSurface_ != NULL)
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201 {
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202 window_.Render(sdlSurface_);
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203 }
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204 }
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205
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206
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207 void SdlCairoViewport::ToggleMaximize()
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208 {
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209 // No need to call "Invalidate()" here, as "UpdateSize()" will
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210 // be invoked after event "SDL_WINDOWEVENT_SIZE_CHANGED"
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211 SdlLock lock(*this);
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212 window_.ToggleMaximize();
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213 }
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214
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215
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216 // Assumes that the mutex is locked
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217 void SdlCairoViewport::CreateSdlSurfaceFromCompositor(const CairoCompositor& compositor)
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218 {
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219 static const uint32_t rmask = 0x00ff0000;
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220 static const uint32_t gmask = 0x0000ff00;
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221 static const uint32_t bmask = 0x000000ff;
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222
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223 const unsigned int width = compositor.GetCanvas().GetWidth();
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224 const unsigned int height = compositor.GetCanvas().GetHeight();
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225
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226 if (sdlSurface_ != NULL)
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227 {
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228 if (sdlSurface_->pixels == compositor.GetCanvas().GetBuffer() &&
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229 sdlSurface_->w == static_cast<int>(width) &&
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230 sdlSurface_->h == static_cast<int>(height) &&
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231 sdlSurface_->pitch == static_cast<int>(compositor.GetCanvas().GetPitch()))
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232 {
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233 // The image from the compositor has not changed, no need to update the surface
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234 return;
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235 }
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236 else
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237 {
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238 SDL_FreeSurface(sdlSurface_);
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239 }
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240 }
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241
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242 sdlSurface_ = SDL_CreateRGBSurfaceFrom((void*)(compositor.GetCanvas().GetBuffer()), width, height, 32,
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243 compositor.GetCanvas().GetPitch(), rmask, gmask, bmask, 0);
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244 if (!sdlSurface_)
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245 {
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246 LOG(ERROR) << "Cannot create a SDL surface from a Cairo surface";
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247 throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError);
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248 }
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249 }
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250
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251
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252 boost::shared_ptr<SdlCairoViewport> SdlCairoViewport::Create(const std::string& title,
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253 unsigned int width,
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254 unsigned int height,
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255 bool allowDpiScaling)
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256 {
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257 boost::shared_ptr<SdlCairoViewport> that =
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258 boost::shared_ptr<SdlCairoViewport>(new SdlCairoViewport(title, width, height, allowDpiScaling));
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259 that->SdlViewport::PostConstructor();
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260 return that;
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261 }
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262 }