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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 *
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6 * This program is free software: you can redistribute it and/or
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7 * modify it under the terms of the GNU General Public License as
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8 * published by the Free Software Foundation, either version 3 of the
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9 * License, or (at your option) any later version.
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10 *
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11 * In addition, as a special exception, the copyright holders of this
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12 * program give permission to link the code of its release with the
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13 * OpenSSL project's "OpenSSL" library (or with modified versions of it
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14 * that use the same license as the "OpenSSL" library), and distribute
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15 * the linked executables. You must obey the GNU General Public License
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16 * in all respects for all of the code used other than "OpenSSL". If you
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17 * modify file(s) with this exception, you may extend this exception to
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18 * your version of the file(s), but you are not obligated to do so. If
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19 * you do not wish to do so, delete this exception statement from your
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20 * version. If you delete this exception statement from all source files
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21 * in the program, then also delete it here.
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22 *
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23 * This program is distributed in the hope that it will be useful, but
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24 * WITHOUT ANY WARRANTY; without even the implied warranty of
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25 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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26 * General Public License for more details.
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27 *
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28 * You should have received a copy of the GNU General Public License
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29 * along with this program. If not, see <http://www.gnu.org/licenses/>.
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30 **/
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31
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32
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33 #include "SdlBuffering.h"
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34
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35 #if ORTHANC_ENABLE_SDL == 1
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36
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37 #include "../../Orthanc/Core/Logging.h"
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38 #include "../../Orthanc/Core/OrthancException.h"
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39
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40 namespace OrthancStone
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41 {
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42 SdlBuffering::SdlBuffering() :
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43 sdlSurface_(NULL),
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44 pendingFrame_(false)
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45 {
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46 }
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47
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48
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49 SdlBuffering::~SdlBuffering()
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50 {
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51 if (sdlSurface_)
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52 {
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53 SDL_FreeSurface(sdlSurface_);
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54 }
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55 }
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56
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57
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58 void SdlBuffering::SetSize(unsigned int width,
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59 unsigned int height,
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60 IViewport& viewport)
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61 {
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62 boost::mutex::scoped_lock lock(mutex_);
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63
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64 viewport.SetSize(width, height);
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65
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66 if (offscreenSurface_.get() == NULL ||
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67 offscreenSurface_->GetWidth() != width ||
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68 offscreenSurface_->GetHeight() != height)
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69 {
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70 offscreenSurface_.reset(new CairoSurface(width, height));
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71 }
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72
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73 if (onscreenSurface_.get() == NULL ||
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74 onscreenSurface_->GetWidth() != width ||
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75 onscreenSurface_->GetHeight() != height)
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76 {
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77 onscreenSurface_.reset(new CairoSurface(width, height));
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78
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79 // TODO Big endian?
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80 static const uint32_t rmask = 0x00ff0000;
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81 static const uint32_t gmask = 0x0000ff00;
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82 static const uint32_t bmask = 0x000000ff;
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83
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84 if (sdlSurface_)
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85 {
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86 SDL_FreeSurface(sdlSurface_);
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87 }
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88
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89 sdlSurface_ = SDL_CreateRGBSurfaceFrom(onscreenSurface_->GetBuffer(), width, height, 32,
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90 onscreenSurface_->GetPitch(), rmask, gmask, bmask, 0);
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91 if (!sdlSurface_)
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92 {
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93 LOG(ERROR) << "Cannot create a SDL surface from a Cairo surface";
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94 throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError);
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95 }
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96 }
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97
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98 pendingFrame_ = false;
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99 }
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100
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101
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102 bool SdlBuffering::RenderOffscreen(IViewport& viewport)
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103 {
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104 boost::mutex::scoped_lock lock(mutex_);
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105
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106 if (offscreenSurface_.get() == NULL)
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107 {
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108 return false;
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109 }
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110
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111 Orthanc::ImageAccessor target = offscreenSurface_->GetAccessor();
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112
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113 if (viewport.Render(target) &&
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114 !pendingFrame_)
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115 {
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116 pendingFrame_ = true;
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117 return true;
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118 }
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119 else
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120 {
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121 return false;
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122 }
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123 }
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124
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125
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126 void SdlBuffering::SwapToScreen(SdlWindow& window)
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127 {
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128 if (!pendingFrame_ ||
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129 offscreenSurface_.get() == NULL ||
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130 onscreenSurface_.get() == NULL)
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131 {
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132 return;
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133 }
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134
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135 {
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136 boost::mutex::scoped_lock lock(mutex_);
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137 onscreenSurface_->Copy(*offscreenSurface_);
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138 }
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139
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140 window.Render(sdlSurface_);
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141 pendingFrame_ = false;
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142 }
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143 }
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144
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145 #endif
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