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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 #pragma once
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23
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24 #include "../Enumerations.h"
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25 #include "GeometryToolbox.h"
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26
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27 #include <Core/Images/ImageTraits.h>
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28
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29 #include <boost/noncopyable.hpp>
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30 #include <cmath>
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31
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32 namespace OrthancStone
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33 {
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34 namespace Internals
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35 {
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36 class SubpixelReaderBase : public boost::noncopyable
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37 {
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38 private:
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39 const Orthanc::ImageAccessor& source_;
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40 unsigned int width_;
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41 unsigned int height_;
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42
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43 public:
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44 SubpixelReaderBase(const Orthanc::ImageAccessor& source) :
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45 source_(source),
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46 width_(source.GetWidth()),
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47 height_(source.GetHeight())
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48 {
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49 }
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50
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51 ORTHANC_FORCE_INLINE
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52 const Orthanc::ImageAccessor& GetSource() const
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53 {
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54 return source_;
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55 }
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56
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57 ORTHANC_FORCE_INLINE
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58 unsigned int GetWidth() const
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59 {
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60 return width_;
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61 }
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62
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63 ORTHANC_FORCE_INLINE
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64 unsigned int GetHeight() const
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65 {
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66 return height_;
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67 }
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68 };
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69 }
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70
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71
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72 template <Orthanc::PixelFormat Format,
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73 ImageInterpolation Interpolation>
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74 class SubpixelReader;
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75
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76
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77 template <Orthanc::PixelFormat Format>
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78 class SubpixelReader<Format, ImageInterpolation_Nearest> :
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79 public Internals::SubpixelReaderBase
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80 {
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81 public:
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82 typedef Orthanc::PixelTraits<Format> Traits;
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83 typedef typename Traits::PixelType PixelType;
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84
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85 SubpixelReader(const Orthanc::ImageAccessor& source) :
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86 SubpixelReaderBase(source)
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87 {
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88 }
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89
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90 inline bool GetValue(PixelType& target,
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91 float x,
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92 float y) const;
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93 };
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94
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95
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96 template <Orthanc::PixelFormat Format>
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97 class SubpixelReader<Format, ImageInterpolation_Bilinear> :
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98 public Internals::SubpixelReaderBase
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99 {
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100 public:
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101 typedef Orthanc::PixelTraits<Format> Traits;
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102 typedef typename Traits::PixelType PixelType;
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103
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104 SubpixelReader(const Orthanc::ImageAccessor& source) :
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105 SubpixelReaderBase(source)
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106 {
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107 }
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108
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109 inline bool GetValue(PixelType& target,
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110 float x,
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111 float y);
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112 };
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113
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114
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115
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116 template <Orthanc::PixelFormat Format>
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117 bool SubpixelReader<Format, ImageInterpolation_Nearest>::GetValue(PixelType& target,
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118 float x,
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119 float y) const
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120 {
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121 if (x < 0 ||
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122 y < 0)
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123 {
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124 return false;
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125 }
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126 else
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127 {
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128 unsigned int ux = static_cast<unsigned int>(std::floor(x));
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129 unsigned int uy = static_cast<unsigned int>(std::floor(y));
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130
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131 if (ux < GetWidth() &&
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132 uy < GetHeight())
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133 {
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134 Orthanc::ImageTraits<Format>::GetPixel(target, GetSource(), ux, uy);
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135 return true;
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136 }
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137 else
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138 {
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139 return false;
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140 }
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141 }
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142 }
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143
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144
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145
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146 template <Orthanc::PixelFormat Format>
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147 bool SubpixelReader<Format, ImageInterpolation_Bilinear>::GetValue(PixelType& target,
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148 float x,
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149 float y)
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150 {
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151 x -= 0.5f;
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152 y -= 0.5f;
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153
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154 if (x < 0 ||
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155 y < 0)
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156 {
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157 return false;
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158 }
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159 else
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160 {
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161 unsigned int ux = static_cast<unsigned int>(std::floor(x));
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162 unsigned int uy = static_cast<unsigned int>(std::floor(y));
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163
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164 float f00, f01, f10, f11;
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165
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166 if (ux < GetWidth() &&
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167 uy < GetHeight())
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168 {
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169 f00 = Orthanc::ImageTraits<Format>::GetFloatPixel(GetSource(), ux, uy);
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170 }
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171 else
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172 {
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173 return false;
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174 }
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175
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176 if (ux + 1 < GetWidth())
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177 {
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178 f01 = Orthanc::ImageTraits<Format>::GetFloatPixel(GetSource(), ux + 1, uy);
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179 }
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180 else
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181 {
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182 f01 = f00;
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183 }
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184
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185 if (uy + 1 < GetHeight())
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186 {
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187 f10 = Orthanc::ImageTraits<Format>::GetFloatPixel(GetSource(), ux, uy + 1);
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188 }
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189 else
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190 {
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191 f10 = f00;
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192 }
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193
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194 if (ux + 1 < GetWidth() &&
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195 uy + 1 < GetHeight())
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196 {
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197 f11 = Orthanc::ImageTraits<Format>::GetFloatPixel(GetSource(), ux + 1, uy + 1);
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198 }
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199 else
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200 {
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201 f11 = f00;
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202 }
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203
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204 float ax = x - static_cast<float>(ux);
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205 float ay = y - static_cast<float>(uy);
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206 float value = GeometryToolbox::ComputeBilinearInterpolationUnitSquare(ax, ay, f00, f01, f10, f11);
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207
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208 Traits::FloatToPixel(target, value);
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209 return true;
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210 }
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211 }
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212 }
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