Mercurial > hg > orthanc-stone
annotate Framework/Toolbox/ViewportGeometry.cpp @ 258:e5a9b3d03478 am-2
first very basic version of SmartLoader
author | am@osimis.io |
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date | Tue, 10 Jul 2018 14:48:13 +0200 |
parents | 5412adf19980 |
children | 7a364e44fbb4 |
rev | line source |
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0 | 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) 2017-2018 Osimis S.A., Belgium |
0 | 6 * |
7 * This program is free software: you can redistribute it and/or | |
47 | 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. | |
0 | 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 | |
47 | 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 | |
0 | 18 * along with this program. If not, see <http://www.gnu.org/licenses/>. |
19 **/ | |
20 | |
21 | |
22 #include "ViewportGeometry.h" | |
23 | |
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24 #include <Core/Logging.h> |
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25 #include <Core/OrthancException.h> |
0 | 26 |
27 #include <boost/math/special_functions/round.hpp> | |
28 | |
29 namespace OrthancStone | |
30 { | |
31 void ViewportGeometry::ComputeTransform() | |
32 { | |
33 // The following lines must be read in reverse order! | |
34 cairo_matrix_t tmp; | |
35 | |
36 // Bring the center of the scene to the center of the view | |
37 cairo_matrix_init_translate(&transform_, | |
38 panX_ + static_cast<double>(width_) / 2.0, | |
39 panY_ + static_cast<double>(height_) / 2.0); | |
40 | |
41 // Apply the zoom around (0,0) | |
42 cairo_matrix_init_scale(&tmp, zoom_, zoom_); | |
43 cairo_matrix_multiply(&transform_, &tmp, &transform_); | |
44 | |
45 // Bring the center of the scene to (0,0) | |
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46 cairo_matrix_init_translate(&tmp, |
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47 -(sceneExtent_.GetX1() + sceneExtent_.GetX2()) / 2.0, |
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48 -(sceneExtent_.GetY1() + sceneExtent_.GetY2()) / 2.0); |
0 | 49 cairo_matrix_multiply(&transform_, &tmp, &transform_); |
50 } | |
51 | |
52 | |
53 ViewportGeometry::ViewportGeometry() | |
54 { | |
55 width_ = 0; | |
56 height_ = 0; | |
57 | |
58 zoom_ = 1; | |
59 panX_ = 0; | |
60 panY_ = 0; | |
61 | |
62 ComputeTransform(); | |
63 } | |
64 | |
65 | |
66 void ViewportGeometry::SetDisplaySize(unsigned int width, | |
67 unsigned int height) | |
68 { | |
69 if (width_ != width || | |
70 height_ != height) | |
71 { | |
72 LOG(INFO) << "New display size: " << width << "x" << height; | |
73 | |
74 width_ = width; | |
75 height_ = height; | |
76 | |
77 ComputeTransform(); | |
78 } | |
79 } | |
80 | |
81 | |
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82 void ViewportGeometry::SetSceneExtent(const Extent2D& extent) |
0 | 83 { |
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84 LOG(INFO) << "New scene extent: (" |
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85 << extent.GetX1() << "," << extent.GetY1() << ") => (" |
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86 << extent.GetX2() << "," << extent.GetY2() << ")"; |
0 | 87 |
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88 sceneExtent_ = extent; |
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89 ComputeTransform(); |
0 | 90 } |
91 | |
92 | |
93 void ViewportGeometry::MapDisplayToScene(double& sceneX /* out */, | |
94 double& sceneY /* out */, | |
95 double x, | |
96 double y) const | |
97 { | |
98 cairo_matrix_t transform = transform_; | |
99 | |
100 if (cairo_matrix_invert(&transform) != CAIRO_STATUS_SUCCESS) | |
101 { | |
102 LOG(ERROR) << "Cannot invert singular matrix"; | |
103 throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError); | |
104 } | |
105 | |
106 sceneX = x; | |
107 sceneY = y; | |
108 cairo_matrix_transform_point(&transform, &sceneX, &sceneY); | |
109 } | |
110 | |
111 | |
112 void ViewportGeometry::MapSceneToDisplay(int& displayX /* out */, | |
113 int& displayY /* out */, | |
114 double x, | |
115 double y) const | |
116 { | |
117 cairo_matrix_transform_point(&transform_, &x, &y); | |
118 | |
119 displayX = static_cast<int>(boost::math::iround(x)); | |
120 displayY = static_cast<int>(boost::math::iround(y)); | |
121 } | |
122 | |
123 | |
124 void ViewportGeometry::SetDefaultView() | |
125 { | |
126 if (width_ > 0 && | |
127 height_ > 0 && | |
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128 !sceneExtent_.IsEmpty()) |
0 | 129 { |
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130 double zoomX = static_cast<double>(width_) / (sceneExtent_.GetX2() - sceneExtent_.GetX1()); |
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131 double zoomY = static_cast<double>(height_) / (sceneExtent_.GetY2() - sceneExtent_.GetY1()); |
0 | 132 zoom_ = zoomX < zoomY ? zoomX : zoomY; |
133 | |
134 panX_ = 0; | |
135 panY_ = 0; | |
136 | |
137 ComputeTransform(); | |
138 } | |
139 } | |
140 | |
141 | |
142 void ViewportGeometry::ApplyTransform(CairoContext& context) const | |
143 { | |
144 cairo_set_matrix(context.GetObject(), &transform_); | |
145 } | |
146 | |
147 | |
148 void ViewportGeometry::GetPan(double& x, | |
149 double& y) const | |
150 { | |
151 x = panX_; | |
152 y = panY_; | |
153 } | |
154 | |
155 | |
156 void ViewportGeometry::SetPan(double x, | |
157 double y) | |
158 { | |
159 panX_ = x; | |
160 panY_ = y; | |
161 ComputeTransform(); | |
162 } | |
163 | |
164 | |
165 void ViewportGeometry::SetZoom(double zoom) | |
166 { | |
167 zoom_ = zoom; | |
168 ComputeTransform(); | |
169 } | |
170 } |