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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 "CompositorHelper.h"
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23
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24 #include <Core/OrthancException.h>
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25
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26 namespace OrthancStone
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27 {
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28 class CompositorHelper::Item : public boost::noncopyable
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29 {
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30 private:
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31 std::auto_ptr<ILayerRenderer> renderer_;
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32 const ISceneLayer& layer_;
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33 uint64_t lastRevision_;
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34
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35 public:
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36 Item(ILayerRenderer* renderer, // Takes ownership
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37 const ISceneLayer& layer) :
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38 renderer_(renderer),
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39 layer_(layer),
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40 lastRevision_(layer.GetRevision())
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41 {
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42 if (renderer == NULL)
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43 {
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44 throw Orthanc::OrthancException(Orthanc::ErrorCode_NullPointer);
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45 }
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46 }
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47
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48 ILayerRenderer& GetRenderer() const
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49 {
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50 assert(renderer_.get() != NULL);
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51 return *renderer_;
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52 }
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53
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54 const ISceneLayer& GetLayer() const
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55 {
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56 return layer_;
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57 }
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58
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59 uint64_t GetLastRevision() const
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60 {
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61 return lastRevision_;
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62 }
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63
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64 void UpdateRenderer()
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65 {
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66 assert(renderer_.get() != NULL);
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67 renderer_->Update(layer_);
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68 lastRevision_ = layer_.GetRevision();
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69 }
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70 };
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71
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72
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73 void CompositorHelper::Visit(const ISceneLayer& layer,
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74 int depth)
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75 {
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76 Content::iterator found = content_.find(depth);
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77
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78 assert(found == content_.end() ||
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79 found->second != NULL);
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80
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81 if (found == content_.end() ||
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82 &found->second->GetLayer() != &layer)
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83 {
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84 // This is the first time this layer is rendered, or the layer
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85 // is not the same as before
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86 if (found != content_.end())
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87 {
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88 delete found->second;
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89 content_.erase(found);
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90 }
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91
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92 std::auto_ptr<ILayerRenderer> renderer(factory_.Create(layer));
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93
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94 if (renderer.get() != NULL)
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95 {
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96 renderer->Render(sceneTransform_);
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97 content_[depth] = new Item(renderer.release(), layer);
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98 }
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99 }
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100 else
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101 {
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102 // This layer has already been rendered
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103 if (found->second->GetLastRevision() < layer.GetRevision())
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104 {
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105 found->second->UpdateRenderer();
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106 }
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107
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108 found->second->GetRenderer().Render(sceneTransform_);
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109 }
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110
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111 // Check invariants
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112 assert(content_.find(depth) == content_.end() ||
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113 (&content_[depth]->GetLayer() == &layer &&
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114 content_[depth]->GetLastRevision() == layer.GetRevision()));
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115 }
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116
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117
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118 CompositorHelper::~CompositorHelper()
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119 {
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120 for (Content::iterator it = content_.begin(); it != content_.end(); ++it)
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121 {
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122 assert(it->second != NULL);
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123 delete it->second;
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124 }
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125 }
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126
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127
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128 void CompositorHelper::Refresh(unsigned int canvasWidth,
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129 unsigned int canvasHeight)
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130 {
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131 // Bring coordinate (0,0) to the center of the canvas
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132 AffineTransform2D offset = AffineTransform2D::CreateOffset(
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133 static_cast<double>(canvasWidth) / 2.0,
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134 static_cast<double>(canvasHeight) / 2.0);
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135
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136 sceneTransform_ = AffineTransform2D::Combine(offset, scene_.GetSceneToCanvasTransform());
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137 scene_.Apply(*this);
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138 }
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139 }
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