Mercurial > hg > orthanc-stone
annotate Framework/Toolbox/ViewportGeometry.cpp @ 47:28956ed68280
agpl license
| author | Sebastien Jodogne <s.jodogne@gmail.com> |
|---|---|
| date | Thu, 27 Apr 2017 11:00:15 +0200 |
| parents | 7207a407bcd8 |
| children | 53bd9277b025 4cff7b1ed31d |
| 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 | |
| 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 | |
| 16 | 24 #include "../../Resources/Orthanc/Core/Logging.h" |
| 25 #include "../../Resources/Orthanc/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) | |
| 46 cairo_matrix_init_translate(&tmp, -(x1_ + x2_) / 2.0, -(y1_ + y2_) / 2.0); | |
| 47 cairo_matrix_multiply(&transform_, &tmp, &transform_); | |
| 48 } | |
| 49 | |
| 50 | |
| 51 ViewportGeometry::ViewportGeometry() | |
| 52 { | |
| 53 x1_ = 0; | |
| 54 y1_ = 0; | |
| 55 x2_ = 0; | |
| 56 y2_ = 0; | |
| 57 | |
| 58 width_ = 0; | |
| 59 height_ = 0; | |
| 60 | |
| 61 zoom_ = 1; | |
| 62 panX_ = 0; | |
| 63 panY_ = 0; | |
| 64 | |
| 65 ComputeTransform(); | |
| 66 } | |
| 67 | |
| 68 | |
| 69 void ViewportGeometry::SetDisplaySize(unsigned int width, | |
| 70 unsigned int height) | |
| 71 { | |
| 72 if (width_ != width || | |
| 73 height_ != height) | |
| 74 { | |
| 75 LOG(INFO) << "New display size: " << width << "x" << height; | |
| 76 | |
| 77 width_ = width; | |
| 78 height_ = height; | |
| 79 | |
| 80 ComputeTransform(); | |
| 81 } | |
| 82 } | |
| 83 | |
| 84 | |
| 85 void ViewportGeometry::SetSceneExtent(double x1, | |
| 86 double y1, | |
| 87 double x2, | |
| 88 double y2) | |
| 89 { | |
| 90 if (x1 == x1_ && | |
| 91 y1 == y1_ && | |
| 92 x2 == x2_ && | |
| 93 y2 == y2_) | |
| 94 { | |
| 95 return; | |
| 96 } | |
| 97 else if (x1 > x2 || | |
| 98 y1 > y2) | |
| 99 { | |
| 100 throw Orthanc::OrthancException(Orthanc::ErrorCode_ParameterOutOfRange); | |
| 101 } | |
| 102 else | |
| 103 { | |
| 104 LOG(INFO) << "New scene extent: (" << x1 << "," << y1 << ") => (" << x2 << "," << y2 << ")"; | |
| 105 | |
| 106 x1_ = x1; | |
| 107 y1_ = y1; | |
| 108 x2_ = x2; | |
| 109 y2_ = y2; | |
| 110 | |
| 111 ComputeTransform(); | |
| 112 } | |
| 113 } | |
| 114 | |
| 115 | |
| 116 void ViewportGeometry::GetSceneExtent(double& x1, | |
| 117 double& y1, | |
| 118 double& x2, | |
| 119 double& y2) const | |
| 120 { | |
| 121 x1 = x1_; | |
| 122 y1 = y1_; | |
| 123 x2 = x2_; | |
| 124 y2 = y2_; | |
| 125 } | |
| 126 | |
| 127 | |
| 128 void ViewportGeometry::MapDisplayToScene(double& sceneX /* out */, | |
| 129 double& sceneY /* out */, | |
| 130 double x, | |
| 131 double y) const | |
| 132 { | |
| 133 cairo_matrix_t transform = transform_; | |
| 134 | |
| 135 if (cairo_matrix_invert(&transform) != CAIRO_STATUS_SUCCESS) | |
| 136 { | |
| 137 LOG(ERROR) << "Cannot invert singular matrix"; | |
| 138 throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError); | |
| 139 } | |
| 140 | |
| 141 sceneX = x; | |
| 142 sceneY = y; | |
| 143 cairo_matrix_transform_point(&transform, &sceneX, &sceneY); | |
| 144 } | |
| 145 | |
| 146 | |
| 147 void ViewportGeometry::MapSceneToDisplay(int& displayX /* out */, | |
| 148 int& displayY /* out */, | |
| 149 double x, | |
| 150 double y) const | |
| 151 { | |
| 152 cairo_matrix_transform_point(&transform_, &x, &y); | |
| 153 | |
| 154 displayX = static_cast<int>(boost::math::iround(x)); | |
| 155 displayY = static_cast<int>(boost::math::iround(y)); | |
| 156 } | |
| 157 | |
| 158 | |
| 159 void ViewportGeometry::SetDefaultView() | |
| 160 { | |
| 161 if (width_ > 0 && | |
| 162 height_ > 0 && | |
| 163 x2_ > x1_ + 10 * std::numeric_limits<double>::epsilon() && | |
| 164 y2_ > y1_ + 10 * std::numeric_limits<double>::epsilon()) | |
| 165 { | |
| 166 double zoomX = static_cast<double>(width_) / (x2_ - x1_); | |
| 167 double zoomY = static_cast<double>(height_) / (y2_ - y1_); | |
| 168 zoom_ = zoomX < zoomY ? zoomX : zoomY; | |
| 169 | |
| 170 panX_ = 0; | |
| 171 panY_ = 0; | |
| 172 | |
| 173 ComputeTransform(); | |
| 174 } | |
| 175 } | |
| 176 | |
| 177 | |
| 178 void ViewportGeometry::ApplyTransform(CairoContext& context) const | |
| 179 { | |
| 180 cairo_set_matrix(context.GetObject(), &transform_); | |
| 181 } | |
| 182 | |
| 183 | |
| 184 void ViewportGeometry::GetPan(double& x, | |
| 185 double& y) const | |
| 186 { | |
| 187 x = panX_; | |
| 188 y = panY_; | |
| 189 } | |
| 190 | |
| 191 | |
| 192 void ViewportGeometry::SetPan(double x, | |
| 193 double y) | |
| 194 { | |
| 195 panX_ = x; | |
| 196 panY_ = y; | |
| 197 ComputeTransform(); | |
| 198 } | |
| 199 | |
| 200 | |
| 201 void ViewportGeometry::SetZoom(double zoom) | |
| 202 { | |
| 203 zoom_ = zoom; | |
| 204 ComputeTransform(); | |
| 205 } | |
| 206 } |