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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 "SdlBuffering.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 "../../Resources/Orthanc/Core/Logging.h"
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27 #include "../../Resources/Orthanc/Core/OrthancException.h"
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28
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29 namespace OrthancStone
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30 {
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31 SdlBuffering::SdlBuffering() :
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32 sdlSurface_(NULL),
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33 pendingFrame_(false)
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34 {
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35 }
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36
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37
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38 SdlBuffering::~SdlBuffering()
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39 {
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40 if (sdlSurface_)
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41 {
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42 SDL_FreeSurface(sdlSurface_);
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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 SdlBuffering::SetSize(unsigned int width,
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48 unsigned int height,
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49 IViewport& viewport)
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50 {
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51 boost::mutex::scoped_lock lock(mutex_);
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52
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53 viewport.SetSize(width, height);
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54
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55 if (offscreenSurface_.get() == NULL ||
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56 offscreenSurface_->GetWidth() != width ||
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57 offscreenSurface_->GetHeight() != height)
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58 {
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59 offscreenSurface_.reset(new CairoSurface(width, height));
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60 }
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61
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62 if (onscreenSurface_.get() == NULL ||
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63 onscreenSurface_->GetWidth() != width ||
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64 onscreenSurface_->GetHeight() != height)
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65 {
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66 onscreenSurface_.reset(new CairoSurface(width, height));
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67
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68 // TODO Big endian?
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69 static const uint32_t rmask = 0x00ff0000;
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70 static const uint32_t gmask = 0x0000ff00;
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71 static const uint32_t bmask = 0x000000ff;
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72
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73 if (sdlSurface_)
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74 {
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75 SDL_FreeSurface(sdlSurface_);
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76 }
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77
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78 sdlSurface_ = SDL_CreateRGBSurfaceFrom(onscreenSurface_->GetBuffer(), width, height, 32,
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79 onscreenSurface_->GetPitch(), rmask, gmask, bmask, 0);
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80 if (!sdlSurface_)
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81 {
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82 LOG(ERROR) << "Cannot create a SDL surface from a Cairo surface";
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83 throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError);
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84 }
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85 }
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86
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87 pendingFrame_ = false;
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88 }
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89
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90
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91 bool SdlBuffering::RenderOffscreen(IViewport& viewport)
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92 {
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93 boost::mutex::scoped_lock lock(mutex_);
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94
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95 if (offscreenSurface_.get() == NULL)
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96 {
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97 return false;
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98 }
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99
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100 Orthanc::ImageAccessor target = offscreenSurface_->GetAccessor();
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101
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102 if (viewport.Render(target) &&
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103 !pendingFrame_)
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104 {
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105 pendingFrame_ = true;
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106 return true;
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107 }
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108 else
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109 {
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110 return false;
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111 }
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112 }
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113
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114
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115 void SdlBuffering::SwapToScreen(SdlWindow& window)
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116 {
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117 if (!pendingFrame_ ||
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118 offscreenSurface_.get() == NULL ||
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119 onscreenSurface_.get() == NULL)
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120 {
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121 return;
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122 }
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123
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124 {
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125 boost::mutex::scoped_lock lock(mutex_);
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126 onscreenSurface_->Copy(*offscreenSurface_);
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127 }
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128
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129 window.Render(sdlSurface_);
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130 pendingFrame_ = false;
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131 }
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132 }
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133
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134 #endif
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