Mercurial > hg > orthanc-stone

annotate Framework/Radiography/RadiographyMaskLayer.cpp @ 475:3c28542229a3 am-touch-events

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added a mask layer in the RadiographyWidget (to be cleaned)
author am@osimis.io
date Tue, 12 Feb 2019 12:22:13 +0100
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children a95090305dd4
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475
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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) 2017-2018 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 Affero 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 * Affero 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 Affero General Public License
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18 * along with this program. If not, see <http://www.gnu.org/licenses/>.
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19 **/
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20
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21
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22 #include "RadiographyMaskLayer.h"
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23 #include "RadiographyDicomLayer.h"
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24
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25 #include "RadiographyScene.h"
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26 #include "Core/Images/Image.h"
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27 #include "Core/Images/ImageProcessing.h"
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28 #include <Core/OrthancException.h>
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29
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30 namespace OrthancStone
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31 {
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32
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33 void ComputeMaskExtent(unsigned int& left, unsigned int& right, unsigned int& top, unsigned int& bottom, const std::vector<MaskPoint>& corners)
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34 {
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35 left = std::numeric_limits<unsigned int>::max();
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36 right = std::numeric_limits<unsigned int>::min();
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37 top = std::numeric_limits<unsigned int>::max();
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38 bottom = std::numeric_limits<unsigned int>::min();
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39
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40 for (size_t i = 0; i < corners.size(); i++)
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41 {
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42 const MaskPoint& p = corners[i];
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43 left = std::min(p.x, left);
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44 right = std::max(p.x, right);
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45 bottom = std::max(p.y, bottom);
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46 top = std::min(p.y, top);
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47 }
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48 }
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49
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50 void RadiographyMaskLayer::SetCorners(const std::vector<MaskPoint>& corners)
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51 {
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52 corners_ = corners;
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53 invalidated_ = true;
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54 }
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55
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56 void RadiographyMaskLayer::Render(Orthanc::ImageAccessor& buffer,
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57 const AffineTransform2D& viewTransform,
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58 ImageInterpolation interpolation) const
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59 {
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60 if (dicomLayer_.GetWidth() == 0) // nothing to do if the DICOM layer is not displayed (or not loaded)
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61 return;
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62
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63 if (invalidated_)
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64 {
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65 mask_.reset(new Orthanc::Image(Orthanc::PixelFormat_Grayscale8, dicomLayer_.GetWidth(), dicomLayer_.GetHeight(), false));
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66
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67 DrawMask();
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68
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69 // for (unsigned int i = 0; i < 100; i++)
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70 // {
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71 // for (unsigned int j = 0; j < 50; j++)
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72 // {
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73 // if ((i + j) % 2 == 1)
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74 // {
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75 // Orthanc::ImageAccessor region;
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76 // mask_->GetRegion(region, i* 20, j * 20, 20, 20);
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77 // Orthanc::ImageProcessing::Set(region, 255);
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78 // }
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79 // }
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80 // }
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81 invalidated_ = false;
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82 }
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83
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84 {// rendering
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85 if (buffer.GetFormat() != Orthanc::PixelFormat_Float32)
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86 {
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87 throw Orthanc::OrthancException(Orthanc::ErrorCode_IncompatibleImageFormat);
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88 }
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89
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90 unsigned int cropX, cropY, cropWidth, cropHeight;
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91 dicomLayer_.GetCrop(cropX, cropY, cropWidth, cropHeight);
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92
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93 const AffineTransform2D t = AffineTransform2D::Combine(
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94 viewTransform, dicomLayer_.GetTransform(),
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95 AffineTransform2D::CreateOffset(cropX, cropY));
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96
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97 Orthanc::ImageAccessor cropped;
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98 mask_->GetRegion(cropped, cropX, cropY, cropWidth, cropHeight);
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99
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100 Orthanc::Image tmp(Orthanc::PixelFormat_Grayscale8, buffer.GetWidth(), buffer.GetHeight(), false);
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101
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102 t.Apply(tmp, cropped, interpolation, true /* clear */);
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103
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104 // Blit
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105 const unsigned int width = buffer.GetWidth();
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106 const unsigned int height = buffer.GetHeight();
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107
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108 for (unsigned int y = 0; y < height; y++)
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109 {
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110 float *q = reinterpret_cast<float*>(buffer.GetRow(y));
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111 const uint8_t *p = reinterpret_cast<uint8_t*>(tmp.GetRow(y));
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112
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113 for (unsigned int x = 0; x < width; x++, p++, q++)
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114 {
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115 if (*p == 0)
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116 *q = foreground_;
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117 // else keep the underlying pixel value
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118 }
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119 }
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120
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121 }
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122 }
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123
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124 // from https://www.geeksforgeeks.org/how-to-check-if-a-given-point-lies-inside-a-polygon/
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125 // Given three colinear points p, q, r, the function checks if
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126 // point q lies on line segment 'pr'
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127 bool onSegment(const MaskPoint& p, const MaskPoint& q, const MaskPoint& r)
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128 {
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129 if (q.x <= std::max(p.x, r.x) && q.x >= std::min(p.x, r.x) &&
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130 q.y <= std::max(p.y, r.y) && q.y >= std::min(p.y, r.y))
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131 return true;
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132 return false;
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133 }
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134
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135 // To find orientation of ordered triplet (p, q, r).
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136 // The function returns following values
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137 // 0 --> p, q and r are colinear
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138 // 1 --> Clockwise
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139 // 2 --> Counterclockwise
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140 int orientation(const MaskPoint& p, const MaskPoint& q, const MaskPoint& r)
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141 {
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142 int val = (q.y - p.y) * (r.x - q.x) -
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143 (q.x - p.x) * (r.y - q.y);
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144
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145 if (val == 0) return 0; // colinear
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146 return (val > 0)? 1: 2; // clock or counterclock wise
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147 }
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148
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149 // The function that returns true if line segment 'p1q1'
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150 // and 'p2q2' intersect.
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151 bool doIntersect(const MaskPoint& p1, const MaskPoint& q1, const MaskPoint& p2, const MaskPoint& q2)
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152 {
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153 // Find the four orientations needed for general and
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154 // special cases
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155 int o1 = orientation(p1, q1, p2);
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156 int o2 = orientation(p1, q1, q2);
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157 int o3 = orientation(p2, q2, p1);
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158 int o4 = orientation(p2, q2, q1);
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159
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160 // General case
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161 if (o1 != o2 && o3 != o4)
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162 return true;
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163
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164 // Special Cases
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165 // p1, q1 and p2 are colinear and p2 lies on segment p1q1
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166 if (o1 == 0 && onSegment(p1, p2, q1)) return true;
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167
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168 // p1, q1 and p2 are colinear and q2 lies on segment p1q1
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169 if (o2 == 0 && onSegment(p1, q2, q1)) return true;
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170
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171 // p2, q2 and p1 are colinear and p1 lies on segment p2q2
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172 if (o3 == 0 && onSegment(p2, p1, q2)) return true;
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173
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174 // p2, q2 and q1 are colinear and q1 lies on segment p2q2
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175 if (o4 == 0 && onSegment(p2, q1, q2)) return true;
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176
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177 return false; // Doesn't fall in any of the above cases
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178 }
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179
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180 // Define Infinite (Using INT_MAX caused overflow problems)
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181 #define MASK_INF 1000000
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182
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183 // Returns true if the point p lies inside the polygon[] with n vertices
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184 bool isInside(const std::vector<MaskPoint>& polygon, const MaskPoint& p)
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185 {
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186 // There must be at least 3 vertices in polygon[]
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187 if (polygon.size() < 3) return false;
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188
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189 // Create a point for line segment from p to infinite
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190 MaskPoint extreme = {MASK_INF, p.y};
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191
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192 // Count intersections of the above line with sides of polygon
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193 int count = 0, i = 0;
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194 do
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195 {
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196 int next = (i+1) % polygon.size();
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197
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198 // Check if the line segment from 'p' to 'extreme' intersects
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199 // with the line segment from 'polygon[i]' to 'polygon[next]'
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200 if (doIntersect(polygon[i], polygon[next], p, extreme))
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201 {
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202 // If the point 'p' is colinear with line segment 'i-next',
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203 // then check if it lies on segment. If it lies, return true,
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204 // otherwise false
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205 if (orientation(polygon[i], p, polygon[next]) == 0)
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206 return onSegment(polygon[i], p, polygon[next]);
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207
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208 count++;
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209 }
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210 i = next;
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211 } while (i != 0);
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212
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213 // Return true if count is odd, false otherwise
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214 return count&1; // Same as (count%2 == 1)
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215 }
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216
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217
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218 void RadiographyMaskLayer::DrawMask() const
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219 {
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220 unsigned int left;
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221 unsigned int right;
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222 unsigned int top;
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223 unsigned int bottom;
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224
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225 ComputeMaskExtent(left, right, top, bottom, corners_);
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226
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227 Orthanc::ImageProcessing::Set(*mask_, 0);
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228
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229 MaskPoint p(left, top);
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230 for (p.y = top; p.y <= bottom; p.y++)
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231 {
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232 unsigned char* q = reinterpret_cast<unsigned char*>(mask_->GetRow(p.y));
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233 for (p.x = left; p.x <= right; p.x++, q++)
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234 {
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235 if (isInside(corners_, p))
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236 {
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237 *q = 255;
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238 }
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239 }
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240 }
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241
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242 // Orthanc::ImageAccessor region;
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243 // mask_->GetRegion(region, 100, 100, 1000, 1000);
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244 // Orthanc::ImageProcessing::Set(region, 255);
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245 }
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246
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247 }