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annotate OrthancStone/Sources/Scene2D/MacroSceneLayer.h @ 1802:757987cb5a68

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recycling of layers in MacroSceneLayer
author Sebastien Jodogne <s.jodogne@gmail.com>
date Thu, 20 May 2021 13:58:26 +0200
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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) 2017-2021 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 Lesser 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 * 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/>.
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20 **/
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21
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22
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23 #pragma once
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25 #include "ISceneLayer.h"
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26
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27 #include <Compatibility.h> // For ORTHANC_OVERRIDE
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28
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29 #include <deque>
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30 #include <set>
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31
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32 namespace OrthancStone
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33 {
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34 /**
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35 * A "macro layer" is a group of sublayers that are handled as a
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36 * whole, and that share the same depth in the scene.
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37 **/
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38 class MacroSceneLayer : public ISceneLayer
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39 {
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40 private:
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41 // A deque is used because we need to quickly add new layers, and
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42 // to randomly access the layers
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43 std::deque<ISceneLayer*> layers_;
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44 uint64_t revision_;
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45 std::set<size_t> recycledLayers_;
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46
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47 void CheckInvariant() const;
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48
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49 protected:
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50 void BumpRevision()
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51 {
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52 // this is *not* thread-safe!!! => (SJO) no problem, Stone assumes mono-threading
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53 revision_++;
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54 }
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55
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56 public:
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57 MacroSceneLayer() :
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58 revision_(0)
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59 {
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60 }
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61
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62 virtual ~MacroSceneLayer()
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63 {
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64 Clear();
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65 }
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66
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67 void Clear();
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68
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69 size_t AddLayer(ISceneLayer* layer); // takes ownership
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70
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71 size_t GetSize() const
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72 {
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73 return layers_.size();
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74 }
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75
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76 void UpdateLayer(size_t index,
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77 ISceneLayer* layer); // takes ownership
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78
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79 bool HasLayer(size_t index) const;
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80
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81 void DeleteLayer(size_t index);
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82
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83 const ISceneLayer& GetLayer(size_t i) const;
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84
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85 virtual ISceneLayer* Clone() const ORTHANC_OVERRIDE;
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86
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87 virtual Type GetType() const ORTHANC_OVERRIDE
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88 {
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89 return Type_Macro;
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90 }
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91
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92 virtual void GetBoundingBox(Extent2D& target) const ORTHANC_OVERRIDE;
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94 virtual uint64_t GetRevision() const ORTHANC_OVERRIDE
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95 {
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96 return revision_;
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97 }
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98 };
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99 }