Mercurial > hg > orthanc-stone

annotate OrthancStone/Sources/Platforms/Sdl/SdlViewport.cpp @ 1899:917500c46fe0

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moved the Platform folder from the Applications folder to the Stone library itself
author Alain Mazy <am@osimis.io>
date Sat, 29 Jan 2022 12:47:32 +0100
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children 184b0aeae1af
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1899
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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) 2017-2022 Osimis S.A., Belgium
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6 * Copyright (C) 2021-2022 Sebastien Jodogne, ICTEAM UCLouvain, Belgium
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7 *
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8 * This program is free software: you can redistribute it and/or
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9 * modify it under the terms of the GNU Lesser General Public License
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10 * as published by the Free Software Foundation, either version 3 of
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11 * the License, or (at your option) any later version.
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12 *
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13 * This program is distributed in the hope that it will be useful, but
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14 * WITHOUT ANY WARRANTY; without even the implied warranty of
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15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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16 * Lesser General Public License for more details.
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17 *
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18 * You should have received a copy of the GNU Lesser General Public
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19 * License along with this program. If not, see
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20 * <http://www.gnu.org/licenses/>.
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21 **/
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22
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23 #include "SdlViewport.h"
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24
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25 #include "../../../OrthancStone/Sources/Scene2DViewport/ViewportController.h"
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26
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27 #include <OrthancException.h>
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28
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29 #include <boost/make_shared.hpp>
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30
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31 namespace OrthancStone
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32 {
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33 ICompositor& SdlViewport::SdlLock::GetCompositor()
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34 {
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35 if (that_.compositor_.get() == NULL)
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36 {
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37 // The derived class should have called "AcquireCompositor()"
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38 throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError);
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39 }
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40 else
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41 {
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42 return *that_.compositor_;
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43 }
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44 }
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45
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46
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47 void SdlViewport::AcquireCompositor(ICompositor* compositor /* takes ownership */)
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48 {
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49 if (compositor == NULL)
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50 {
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51 throw Orthanc::OrthancException(Orthanc::ErrorCode_NullPointer);
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52 }
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53
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54 compositor_.reset(compositor);
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55 }
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56
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57
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58 SdlViewport::SdlViewport()
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59 {
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60 refreshEvent_ = SDL_RegisterEvents(1);
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61
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62 if (refreshEvent_ == static_cast<uint32_t>(-1))
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63 {
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64 throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError);
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65 }
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66 }
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67
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68 void SdlViewport::PostConstructor()
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69 {
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70 controller_ = boost::make_shared<ViewportController>(shared_from_this());
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71 }
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72
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73 void SdlViewport::SendRefreshEvent()
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74 {
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75 SDL_Event event;
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76 SDL_memset(&event, 0, sizeof(event));
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77 event.type = refreshEvent_;
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78 SDL_PushEvent(&event); // This function is thread-safe, and can be called from other threads safely.
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79 }
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80
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81
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82 void SdlViewport::UpdateSize(unsigned int width, unsigned int height)
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83 {
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84 SdlLock lock(*this);
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85 lock.GetCompositor().SetCanvasSize(width, height);
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86 lock.Invalidate();
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87 }
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88
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89
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90 #if ORTHANC_ENABLE_OPENGL == 1
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91 SdlOpenGLViewport::SdlOpenGLViewport(const std::string& title,
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92 unsigned int width,
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93 unsigned int height,
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94 bool allowDpiScaling) :
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95 context_(title.c_str(), width, height, allowDpiScaling)
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96 {
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97 AcquireCompositor(new OpenGLCompositor(context_)); // (*)
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98 }
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99 #endif
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100
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101
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102 #if ORTHANC_ENABLE_OPENGL == 1
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103 void SdlOpenGLViewport::RefreshCanvasSize()
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104 {
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105 UpdateSize(context_.GetCanvasWidth(), context_.GetCanvasHeight());
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106 }
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107 #endif
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108
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109
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110 #if ORTHANC_ENABLE_OPENGL == 1
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111 boost::shared_ptr<SdlOpenGLViewport> SdlOpenGLViewport::Create(const std::string& title,
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112 unsigned int width,
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113 unsigned int height,
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114 bool allowDpiScaling)
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115 {
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116 boost::shared_ptr<SdlOpenGLViewport> that =
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117 boost::shared_ptr<SdlOpenGLViewport>(new SdlOpenGLViewport(title, width, height, allowDpiScaling));
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118 that->SdlViewport::PostConstructor();
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119 return that;
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120 }
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121 #endif
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122
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123
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124 #if ORTHANC_ENABLE_OPENGL == 1
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125 uint32_t SdlOpenGLViewport::GetSdlWindowId()
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126 {
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127 const SdlWindow& sdlWindowWrapper = context_.GetWindow();
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128 SDL_Window* sdlWindow = sdlWindowWrapper.GetObject();
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129 Uint32 sdlWindowId = SDL_GetWindowID(sdlWindow);
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130 return sdlWindowId;
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131 }
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132 #endif
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133
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134
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135 #if ORTHANC_ENABLE_OPENGL == 1
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136 SdlOpenGLViewport::~SdlOpenGLViewport()
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137 {
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138 // Make sure that the "OpenGLCompositor" is destroyed BEFORE the
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139 // "OpenGLContext" it references (*)
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140 ClearCompositor();
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141 }
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142 #endif
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143
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144
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145 #if ORTHANC_ENABLE_OPENGL == 1
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146 void SdlOpenGLViewport::Paint()
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147 {
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148 SdlLock lock(*this);
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149 lock.GetCompositor().Refresh(lock.GetController().GetScene());
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150 }
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151 #endif
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152
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153
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154 #if ORTHANC_ENABLE_OPENGL == 1
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155 void SdlOpenGLViewport::ToggleMaximize()
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156 {
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157 // No need to call "Invalidate()" here, as "UpdateSize()" will
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158 // be invoked after event "SDL_WINDOWEVENT_SIZE_CHANGED"
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159 SdlLock lock(*this);
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160 context_.ToggleMaximize();
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161 }
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162 #endif
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163
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164
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165 void SdlCairoViewport::RefreshCanvasSize()
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166 {
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167 UpdateSize(window_.GetWidth(), window_.GetHeight());
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168 }
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169
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170 SdlCairoViewport::SdlCairoViewport(const std::string& title,
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171 unsigned int width,
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172 unsigned int height,
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173 bool allowDpiScaling) :
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174 window_(title, width, height, false /* enable OpenGL */, allowDpiScaling),
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175 sdlSurface_(NULL)
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176 {
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177 AcquireCompositor(new CairoCompositor(width, height));
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178 }
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179
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180 SdlCairoViewport::~SdlCairoViewport()
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181 {
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182 if (sdlSurface_)
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183 {
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184 SDL_FreeSurface(sdlSurface_);
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185 }
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186 }
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187
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188 uint32_t SdlCairoViewport::GetSdlWindowId()
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189 {
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190 SDL_Window* sdlWindow = window_.GetObject();
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191 Uint32 sdlWindowId = SDL_GetWindowID(sdlWindow);
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192 return sdlWindowId;
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193 }
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194
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195 void SdlCairoViewport::Paint()
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196 {
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197 SdlLock lock(*this);
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198
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199 lock.GetCompositor().Refresh(lock.GetController().GetScene());
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200 CreateSdlSurfaceFromCompositor(dynamic_cast<CairoCompositor&>(lock.GetCompositor()));
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201
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202 if (sdlSurface_ != NULL)
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203 {
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204 window_.Render(sdlSurface_);
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205 }
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206 }
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207
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208
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209 void SdlCairoViewport::ToggleMaximize()
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210 {
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211 // No need to call "Invalidate()" here, as "UpdateSize()" will
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212 // be invoked after event "SDL_WINDOWEVENT_SIZE_CHANGED"
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213 SdlLock lock(*this);
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214 window_.ToggleMaximize();
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215 }
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216
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217
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218 // Assumes that the mutex is locked
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219 void SdlCairoViewport::CreateSdlSurfaceFromCompositor(const CairoCompositor& compositor)
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220 {
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221 static const uint32_t rmask = 0x00ff0000;
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222 static const uint32_t gmask = 0x0000ff00;
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223 static const uint32_t bmask = 0x000000ff;
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224
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225 const unsigned int width = compositor.GetCanvas().GetWidth();
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226 const unsigned int height = compositor.GetCanvas().GetHeight();
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227
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228 if (sdlSurface_ != NULL)
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229 {
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230 if (sdlSurface_->pixels == compositor.GetCanvas().GetBuffer() &&
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231 sdlSurface_->w == static_cast<int>(width) &&
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232 sdlSurface_->h == static_cast<int>(height) &&
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233 sdlSurface_->pitch == static_cast<int>(compositor.GetCanvas().GetPitch()))
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234 {
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235 // The image from the compositor has not changed, no need to update the surface
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236 return;
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237 }
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238 else
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239 {
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240 SDL_FreeSurface(sdlSurface_);
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241 }
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242 }
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243
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244 sdlSurface_ = SDL_CreateRGBSurfaceFrom((void*)(compositor.GetCanvas().GetBuffer()), width, height, 32,
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245 compositor.GetCanvas().GetPitch(), rmask, gmask, bmask, 0);
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246 if (!sdlSurface_)
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247 {
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248 LOG(ERROR) << "Cannot create a SDL surface from a Cairo surface";
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249 throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError);
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250 }
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251 }
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252
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253
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254 boost::shared_ptr<SdlCairoViewport> SdlCairoViewport::Create(const std::string& title,
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255 unsigned int width,
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256 unsigned int height,
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257 bool allowDpiScaling)
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258 {
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259 boost::shared_ptr<SdlCairoViewport> that =
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260 boost::shared_ptr<SdlCairoViewport>(new SdlCairoViewport(title, width, height, allowDpiScaling));
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261 that->SdlViewport::PostConstructor();
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262 return that;
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263 }
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264 }