Mercurial > hg > orthanc-stone
annotate Framework/Toolbox/ViewportGeometry.cpp @ 40:7207a407bcd8
shared copyright with osimis
| author | Sebastien Jodogne <s.jodogne@gmail.com> |
|---|---|
| date | Wed, 04 Jan 2017 16:37:42 +0100 |
| parents | ff1e935768e7 |
| children | 28956ed68280 |
| rev | line source |
|---|---|
| 0 | 1 /** |
| 2 * Stone of Orthanc | |
| 3 * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics | |
| 4 * Department, University Hospital of Liege, Belgium | |
|
40
7207a407bcd8
shared copyright with osimis
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
16
diff
changeset
|
5 * Copyright (C) 2017 Osimis, Belgium |
| 0 | 6 * |
| 7 * This program is free software: you can redistribute it and/or | |
| 8 * modify it under the terms of the GNU General Public License as | |
| 9 * published by the Free Software Foundation, either version 3 of the | |
| 10 * License, or (at your option) any later version. | |
| 11 * | |
| 12 * In addition, as a special exception, the copyright holders of this | |
| 13 * program give permission to link the code of its release with the | |
| 14 * OpenSSL project's "OpenSSL" library (or with modified versions of it | |
| 15 * that use the same license as the "OpenSSL" library), and distribute | |
| 16 * the linked executables. You must obey the GNU General Public License | |
| 17 * in all respects for all of the code used other than "OpenSSL". If you | |
| 18 * modify file(s) with this exception, you may extend this exception to | |
| 19 * your version of the file(s), but you are not obligated to do so. If | |
| 20 * you do not wish to do so, delete this exception statement from your | |
| 21 * version. If you delete this exception statement from all source files | |
| 22 * in the program, then also delete it here. | |
| 23 * | |
| 24 * This program is distributed in the hope that it will be useful, but | |
| 25 * WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 26 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 27 * General Public License for more details. | |
| 28 * | |
| 29 * You should have received a copy of the GNU General Public License | |
| 30 * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
| 31 **/ | |
| 32 | |
| 33 | |
| 34 #include "ViewportGeometry.h" | |
| 35 | |
| 16 | 36 #include "../../Resources/Orthanc/Core/Logging.h" |
| 37 #include "../../Resources/Orthanc/Core/OrthancException.h" | |
| 0 | 38 |
| 39 #include <boost/math/special_functions/round.hpp> | |
| 40 | |
| 41 namespace OrthancStone | |
| 42 { | |
| 43 void ViewportGeometry::ComputeTransform() | |
| 44 { | |
| 45 // The following lines must be read in reverse order! | |
| 46 cairo_matrix_t tmp; | |
| 47 | |
| 48 // Bring the center of the scene to the center of the view | |
| 49 cairo_matrix_init_translate(&transform_, | |
| 50 panX_ + static_cast<double>(width_) / 2.0, | |
| 51 panY_ + static_cast<double>(height_) / 2.0); | |
| 52 | |
| 53 // Apply the zoom around (0,0) | |
| 54 cairo_matrix_init_scale(&tmp, zoom_, zoom_); | |
| 55 cairo_matrix_multiply(&transform_, &tmp, &transform_); | |
| 56 | |
| 57 // Bring the center of the scene to (0,0) | |
| 58 cairo_matrix_init_translate(&tmp, -(x1_ + x2_) / 2.0, -(y1_ + y2_) / 2.0); | |
| 59 cairo_matrix_multiply(&transform_, &tmp, &transform_); | |
| 60 } | |
| 61 | |
| 62 | |
| 63 ViewportGeometry::ViewportGeometry() | |
| 64 { | |
| 65 x1_ = 0; | |
| 66 y1_ = 0; | |
| 67 x2_ = 0; | |
| 68 y2_ = 0; | |
| 69 | |
| 70 width_ = 0; | |
| 71 height_ = 0; | |
| 72 | |
| 73 zoom_ = 1; | |
| 74 panX_ = 0; | |
| 75 panY_ = 0; | |
| 76 | |
| 77 ComputeTransform(); | |
| 78 } | |
| 79 | |
| 80 | |
| 81 void ViewportGeometry::SetDisplaySize(unsigned int width, | |
| 82 unsigned int height) | |
| 83 { | |
| 84 if (width_ != width || | |
| 85 height_ != height) | |
| 86 { | |
| 87 LOG(INFO) << "New display size: " << width << "x" << height; | |
| 88 | |
| 89 width_ = width; | |
| 90 height_ = height; | |
| 91 | |
| 92 ComputeTransform(); | |
| 93 } | |
| 94 } | |
| 95 | |
| 96 | |
| 97 void ViewportGeometry::SetSceneExtent(double x1, | |
| 98 double y1, | |
| 99 double x2, | |
| 100 double y2) | |
| 101 { | |
| 102 if (x1 == x1_ && | |
| 103 y1 == y1_ && | |
| 104 x2 == x2_ && | |
| 105 y2 == y2_) | |
| 106 { | |
| 107 return; | |
| 108 } | |
| 109 else if (x1 > x2 || | |
| 110 y1 > y2) | |
| 111 { | |
| 112 throw Orthanc::OrthancException(Orthanc::ErrorCode_ParameterOutOfRange); | |
| 113 } | |
| 114 else | |
| 115 { | |
| 116 LOG(INFO) << "New scene extent: (" << x1 << "," << y1 << ") => (" << x2 << "," << y2 << ")"; | |
| 117 | |
| 118 x1_ = x1; | |
| 119 y1_ = y1; | |
| 120 x2_ = x2; | |
| 121 y2_ = y2; | |
| 122 | |
| 123 ComputeTransform(); | |
| 124 } | |
| 125 } | |
| 126 | |
| 127 | |
| 128 void ViewportGeometry::GetSceneExtent(double& x1, | |
| 129 double& y1, | |
| 130 double& x2, | |
| 131 double& y2) const | |
| 132 { | |
| 133 x1 = x1_; | |
| 134 y1 = y1_; | |
| 135 x2 = x2_; | |
| 136 y2 = y2_; | |
| 137 } | |
| 138 | |
| 139 | |
| 140 void ViewportGeometry::MapDisplayToScene(double& sceneX /* out */, | |
| 141 double& sceneY /* out */, | |
| 142 double x, | |
| 143 double y) const | |
| 144 { | |
| 145 cairo_matrix_t transform = transform_; | |
| 146 | |
| 147 if (cairo_matrix_invert(&transform) != CAIRO_STATUS_SUCCESS) | |
| 148 { | |
| 149 LOG(ERROR) << "Cannot invert singular matrix"; | |
| 150 throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError); | |
| 151 } | |
| 152 | |
| 153 sceneX = x; | |
| 154 sceneY = y; | |
| 155 cairo_matrix_transform_point(&transform, &sceneX, &sceneY); | |
| 156 } | |
| 157 | |
| 158 | |
| 159 void ViewportGeometry::MapSceneToDisplay(int& displayX /* out */, | |
| 160 int& displayY /* out */, | |
| 161 double x, | |
| 162 double y) const | |
| 163 { | |
| 164 cairo_matrix_transform_point(&transform_, &x, &y); | |
| 165 | |
| 166 displayX = static_cast<int>(boost::math::iround(x)); | |
| 167 displayY = static_cast<int>(boost::math::iround(y)); | |
| 168 } | |
| 169 | |
| 170 | |
| 171 void ViewportGeometry::SetDefaultView() | |
| 172 { | |
| 173 if (width_ > 0 && | |
| 174 height_ > 0 && | |
| 175 x2_ > x1_ + 10 * std::numeric_limits<double>::epsilon() && | |
| 176 y2_ > y1_ + 10 * std::numeric_limits<double>::epsilon()) | |
| 177 { | |
| 178 double zoomX = static_cast<double>(width_) / (x2_ - x1_); | |
| 179 double zoomY = static_cast<double>(height_) / (y2_ - y1_); | |
| 180 zoom_ = zoomX < zoomY ? zoomX : zoomY; | |
| 181 | |
| 182 panX_ = 0; | |
| 183 panY_ = 0; | |
| 184 | |
| 185 ComputeTransform(); | |
| 186 } | |
| 187 } | |
| 188 | |
| 189 | |
| 190 void ViewportGeometry::ApplyTransform(CairoContext& context) const | |
| 191 { | |
| 192 cairo_set_matrix(context.GetObject(), &transform_); | |
| 193 } | |
| 194 | |
| 195 | |
| 196 void ViewportGeometry::GetPan(double& x, | |
| 197 double& y) const | |
| 198 { | |
| 199 x = panX_; | |
| 200 y = panY_; | |
| 201 } | |
| 202 | |
| 203 | |
| 204 void ViewportGeometry::SetPan(double x, | |
| 205 double y) | |
| 206 { | |
| 207 panX_ = x; | |
| 208 panY_ = y; | |
| 209 ComputeTransform(); | |
| 210 } | |
| 211 | |
| 212 | |
| 213 void ViewportGeometry::SetZoom(double zoom) | |
| 214 { | |
| 215 zoom_ = zoom; | |
| 216 ComputeTransform(); | |
| 217 } | |
| 218 } |