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comparison Framework/Scene2D/CompositorHelper.cpp @ 585:b9ce24c606ae

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TextSceneLayer
author Sebastien Jodogne <s.jodogne@gmail.com>
date Fri, 19 Apr 2019 17:57:58 +0200
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584:434ceeb0bcab 585:b9ce24c606ae
1 /**
2 * Stone of Orthanc
3 * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics
4 * Department, University Hospital of Liege, Belgium
5 * Copyright (C) 2017-2019 Osimis S.A., Belgium
6 *
7 * This program is free software: you can redistribute it and/or
8 * modify it under the terms of the GNU Affero General Public License
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
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Affero General Public License for more details.
16 *
17 * You should have received a copy of the GNU Affero General Public License
18 * along with this program. If not, see <http://www.gnu.org/licenses/>.
19 **/
20
21
22 #include "CompositorHelper.h"
23
24 #include <Core/OrthancException.h>
25
26 namespace OrthancStone
27 {
28 class CompositorHelper::Item : public boost::noncopyable
29 {
30 private:
31 std::auto_ptr<ILayerRenderer> renderer_;
32 const ISceneLayer& layer_;
33 uint64_t lastRevision_;
34
35 public:
36 Item(ILayerRenderer* renderer, // Takes ownership
37 const ISceneLayer& layer) :
38 renderer_(renderer),
39 layer_(layer),
40 lastRevision_(layer.GetRevision())
41 {
42 if (renderer == NULL)
43 {
44 throw Orthanc::OrthancException(Orthanc::ErrorCode_NullPointer);
45 }
46 }
47
48 ILayerRenderer& GetRenderer() const
49 {
50 assert(renderer_.get() != NULL);
51 return *renderer_;
52 }
53
54 const ISceneLayer& GetLayer() const
55 {
56 return layer_;
57 }
58
59 uint64_t GetLastRevision() const
60 {
61 return lastRevision_;
62 }
63
64 void UpdateRenderer()
65 {
66 assert(renderer_.get() != NULL);
67 renderer_->Update(layer_);
68 lastRevision_ = layer_.GetRevision();
69 }
70 };
71
72
73 void CompositorHelper::Visit(const ISceneLayer& layer,
74 int depth)
75 {
76 Content::iterator found = content_.find(depth);
77
78 assert(found == content_.end() ||
79 found->second != NULL);
80
81 if (found == content_.end() ||
82 &found->second->GetLayer() != &layer)
83 {
84 // This is the first time this layer is rendered, or the layer
85 // is not the same as before
86 if (found != content_.end())
87 {
88 delete found->second;
89 content_.erase(found);
90 }
91
92 std::auto_ptr<ILayerRenderer> renderer(factory_.Create(layer));
93
94 if (renderer.get() != NULL)
95 {
96 renderer->Render(sceneTransform_);
97 content_[depth] = new Item(renderer.release(), layer);
98 }
99 }
100 else
101 {
102 // This layer has already been rendered
103 if (found->second->GetLastRevision() < layer.GetRevision())
104 {
105 found->second->UpdateRenderer();
106 }
107
108 found->second->GetRenderer().Render(sceneTransform_);
109 }
110
111 // Check invariants
112 assert(content_.find(depth) == content_.end() ||
113 (&content_[depth]->GetLayer() == &layer &&
114 content_[depth]->GetLastRevision() == layer.GetRevision()));
115 }
116
117
118 CompositorHelper::~CompositorHelper()
119 {
120 for (Content::iterator it = content_.begin(); it != content_.end(); ++it)
121 {
122 assert(it->second != NULL);
123 delete it->second;
124 }
125 }
126
127
128 void CompositorHelper::Refresh(unsigned int canvasWidth,
129 unsigned int canvasHeight)
130 {
131 // Bring coordinate (0,0) to the center of the canvas
132 AffineTransform2D offset = AffineTransform2D::CreateOffset(
133 static_cast<double>(canvasWidth) / 2.0,
134 static_cast<double>(canvasHeight) / 2.0);
135
136 sceneTransform_ = AffineTransform2D::Combine(offset, scene_.GetSceneToCanvasTransform());
137 scene_.Apply(*this);
138 }
139 }