Mercurial > hg > orthanc-stone
annotate OrthancStone/Sources/Scene2D/Internals/CompositorHelper.cpp @ 1652:fa9e6bf84958
integrating pdf.js into Stone Web viewer
author | Sebastien Jodogne <s.jodogne@gmail.com> |
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date | Mon, 16 Nov 2020 20:47:53 +0100 |
parents | 8563ea5d8ae4 |
children | 9ac2a65d4172 |
rev | line source |
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585 | 1 /** |
2 * Stone of Orthanc | |
3 * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics | |
4 * Department, University Hospital of Liege, Belgium | |
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5 * Copyright (C) 2017-2020 Osimis S.A., Belgium |
585 | 6 * |
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 Lesser General Public License |
585 | 9 * as published by the Free Software Foundation, either version 3 of |
10 * the License, or (at your option) any later version. | |
11 * | |
12 * This program is distributed in the hope that it will be useful, but | |
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 * Lesser 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 Lesser General Public |
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18 * License along with this program. If not, see |
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19 * <http://www.gnu.org/licenses/>. |
585 | 20 **/ |
21 | |
22 | |
23 #include "CompositorHelper.h" | |
24 | |
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25 #include <OrthancException.h> |
585 | 26 |
27 namespace OrthancStone | |
28 { | |
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29 namespace Internals |
585 | 30 { |
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31 class CompositorHelper::Item : public boost::noncopyable |
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32 { |
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33 private: |
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34 std::unique_ptr<ILayerRenderer> renderer_; |
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35 const ISceneLayer& layer_; |
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36 uint64_t layerIdentifier_; |
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37 uint64_t lastRevision_; |
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38 |
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39 public: |
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40 Item(ILayerRenderer* renderer, // Takes ownership |
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41 const ISceneLayer& layer, |
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42 uint64_t layerIdentifier) : |
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43 renderer_(renderer), |
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44 layer_(layer), |
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45 layerIdentifier_(layerIdentifier), |
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46 lastRevision_(layer.GetRevision()) |
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47 { |
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48 if (renderer == NULL) |
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49 { |
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50 throw Orthanc::OrthancException(Orthanc::ErrorCode_NullPointer); |
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51 } |
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52 } |
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53 |
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54 ILayerRenderer& GetRenderer() const |
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55 { |
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56 assert(renderer_.get() != NULL); |
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57 return *renderer_; |
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58 } |
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59 |
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60 const ISceneLayer& GetLayer() const |
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61 { |
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62 return layer_; |
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63 } |
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64 |
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65 uint64_t GetLayerIdentifier() const |
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66 { |
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67 return layerIdentifier_; |
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68 } |
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69 |
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70 uint64_t GetLastRevision() const |
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71 { |
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72 return lastRevision_; |
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73 } |
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74 |
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75 void UpdateRenderer() |
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76 { |
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77 assert(renderer_.get() != NULL); |
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78 renderer_->Update(layer_); |
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79 lastRevision_ = layer_.GetRevision(); |
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80 } |
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81 }; |
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82 |
585 | 83 |
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84 void CompositorHelper::Visit(const Scene2D& scene, |
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85 const ISceneLayer& layer, |
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86 uint64_t layerIdentifier, |
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87 int depth) |
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89 // "Visit()" is only applied to layers existing in the scene |
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90 assert(scene.HasLayer(depth)); |
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91 |
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92 Content::iterator found = content_.find(depth); |
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93 |
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94 assert(found == content_.end() || |
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95 found->second != NULL); |
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96 |
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97 if (found == content_.end() || |
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98 found->second->GetLayerIdentifier() != layerIdentifier) |
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100 // This is the first time this layer is rendered, or the layer |
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101 // is not the same as before |
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102 if (found != content_.end()) |
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103 { |
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104 delete found->second; |
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105 content_.erase(found); |
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106 } |
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107 |
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109 // or a NullLayer | |
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110 std::unique_ptr<ILayerRenderer> renderer(factory_.Create(layer)); |
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111 |
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112 if (renderer.get() != NULL) |
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113 { |
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114 renderer->Render(sceneTransform_, canvasWidth_, canvasHeight_); |
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115 content_[depth] = new Item(renderer.release(), layer, layerIdentifier); |
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116 } |
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117 } |
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118 else |
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119 { |
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120 // This layer has already been rendered |
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121 assert(found->second->GetLastRevision() <= layer.GetRevision()); |
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123 if (found->second->GetLastRevision() < layer.GetRevision()) |
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124 { |
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125 found->second->UpdateRenderer(); |
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126 } |
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127 |
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128 found->second->GetRenderer().Render(sceneTransform_, canvasWidth_, canvasHeight_); |
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129 } |
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130 |
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131 // Check invariants |
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132 assert(content_.find(depth) == content_.end() || |
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133 (content_[depth]->GetLayerIdentifier() == layerIdentifier && |
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134 content_[depth]->GetLastRevision() == layer.GetRevision())); |
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135 } |
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136 |
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137 |
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138 CompositorHelper::~CompositorHelper() |
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139 { |
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140 for (Content::iterator it = content_.begin(); it != content_.end(); ++it) |
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141 { |
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142 assert(it->second != NULL); |
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143 delete it->second; |
585 | 144 } |
145 } | |
146 | |
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147 |
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148 void CompositorHelper::Refresh(const Scene2D& scene, |
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149 unsigned int canvasWidth, |
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150 unsigned int canvasHeight) |
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152 /** |
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153 * Safeguard mechanism to enforce the fact that the same scene |
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154 * is always used with the compositor. Note that the safeguard |
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155 * is not 100% bullet-proof, as a new scene might reuse the same |
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156 * address as a previous scene. |
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157 **/ |
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158 if (lastScene_ != NULL && |
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159 lastScene_ != &scene) |
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160 { |
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161 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls, |
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162 "ICompositor::ResetScene() should have been called"); |
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163 } |
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164 |
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165 lastScene_ = &scene; |
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166 |
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167 // Bring coordinate (0,0) to the center of the canvas |
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168 AffineTransform2D offset = AffineTransform2D::CreateOffset( |
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169 static_cast<double>(canvasWidth) / 2.0, |
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170 static_cast<double>(canvasHeight) / 2.0); |
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172 sceneTransform_ = AffineTransform2D::Combine(offset, scene.GetSceneToCanvasTransform()); |
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173 canvasWidth_ = canvasWidth; |
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174 canvasHeight_ = canvasHeight; |
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175 scene.Apply(*this); |
585 | 176 } |
177 } | |
178 } |