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annotate OrthancStone/Sources/Scene2D/LookupTableTextureSceneLayer.cpp @ 1573:32e0c007789d

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author Sebastien Jodogne <s.jodogne@gmail.com>
date Mon, 21 Sep 2020 18:28:34 +0200
parents 244ad1e4e76a
children 4fb8fdf03314
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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) 2017-2020 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 "LookupTableTextureSceneLayer.h"
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23
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24 #include <Images/Image.h>
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25 #include <Images/ImageProcessing.h>
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26 #include <OrthancException.h>
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27
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28 namespace OrthancStone
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29 {
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30 LookupTableTextureSceneLayer::LookupTableTextureSceneLayer(const Orthanc::ImageAccessor& texture) :
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31 applyLog_(false)
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32 {
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33 {
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34 std::unique_ptr<Orthanc::ImageAccessor> t(
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35 new Orthanc::Image(Orthanc::PixelFormat_Float32,
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36 texture.GetWidth(),
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37 texture.GetHeight(),
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38 false));
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39
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40 Orthanc::ImageProcessing::Convert(*t, texture);
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41 SetTexture(t.release());
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42 }
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43
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44 SetLookupTableGrayscale(); // simple ramp between 0 and 255
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45 SetRange(0, 1);
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46 }
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48
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49 void LookupTableTextureSceneLayer::SetLookupTableGrayscale()
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50 {
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51 std::vector<uint8_t> rgb(3 * 256);
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52
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53 for (size_t i = 0; i < 256; i++)
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54 {
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55 rgb[3 * i] = static_cast<uint8_t>(i);
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56 rgb[3 * i + 1] = static_cast<uint8_t>(i);
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57 rgb[3 * i + 2] = static_cast<uint8_t>(i);
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58 }
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59
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60 SetLookupTableRgb(rgb);
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61 }
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63
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64 void LookupTableTextureSceneLayer::SetLookupTableRgb(const std::vector<uint8_t>& lut)
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65 {
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66 if (lut.size() != 3 * 256)
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67 {
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68 throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError);
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69 }
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70
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71 lut_.resize(4 * 256);
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72
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73 for (size_t i = 0; i < 256; i++)
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74 {
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75 // Premultiplied alpha
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76
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77 if (i == 0)
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78 {
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79 // Make zero transparent
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80 lut_[4 * i] = 0; // R
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81 lut_[4 * i + 1] = 0; // G
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82 lut_[4 * i + 2] = 0; // B
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83 lut_[4 * i + 3] = 0; // A
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84 }
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85 else
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86 {
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87 float a = static_cast<float>(i) / 255.0f;
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88
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89 float r = static_cast<float>(lut[3 * i]) * a;
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90 float g = static_cast<float>(lut[3 * i + 1]) * a;
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91 float b = static_cast<float>(lut[3 * i + 2]) * a;
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92
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93 lut_[4 * i] = static_cast<uint8_t>(std::floor(r));
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94 lut_[4 * i + 1] = static_cast<uint8_t>(std::floor(g));
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95 lut_[4 * i + 2] = static_cast<uint8_t>(std::floor(b));
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96 lut_[4 * i + 3] = static_cast<uint8_t>(std::floor(a * 255.0f));
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97 }
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98 }
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99
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100 IncrementRevision();
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101 }
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102
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103
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104 void LookupTableTextureSceneLayer::SetLookupTable(const std::vector<uint8_t>& lut)
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105 {
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106 if (lut.size() == 4 * 256)
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107 {
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108 lut_ = lut;
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109 IncrementRevision();
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110 }
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111 else if (lut.size() == 3 * 256)
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112 {
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113 SetLookupTableRgb(lut);
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114 }
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115 else
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116 {
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117 throw Orthanc::OrthancException(Orthanc::ErrorCode_ParameterOutOfRange);
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118 }
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119 }
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120
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121 void LookupTableTextureSceneLayer::SetRange(float minValue,
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122 float maxValue)
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123 {
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124 if (minValue > maxValue)
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125 {
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126 throw Orthanc::OrthancException(Orthanc::ErrorCode_ParameterOutOfRange);
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127 }
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128 else
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129 {
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130 minValue_ = minValue;
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131 maxValue_ = maxValue;
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132 IncrementRevision();
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133 }
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134 }
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135
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136 void LookupTableTextureSceneLayer::SetApplyLog(bool apply)
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137 {
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138 applyLog_ = apply;
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139 IncrementRevision();
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140 }
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141
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142 void LookupTableTextureSceneLayer::FitRange()
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143 {
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144 Orthanc::ImageProcessing::GetMinMaxFloatValue(minValue_, maxValue_, GetTexture());
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145 assert(minValue_ <= maxValue_);
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146 // TODO: debug to be removed
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147 if (fabs(maxValue_ - minValue_) < 0.0001) {
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148 LOG(INFO) << "LookupTableTextureSceneLayer::FitRange(): minValue_ = " << minValue_ << " maxValue_ = " << maxValue_;
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149 }
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150 IncrementRevision();
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151 }
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152
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153
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154 ISceneLayer* LookupTableTextureSceneLayer::Clone() const
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155 {
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156 std::unique_ptr<LookupTableTextureSceneLayer> cloned
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157 (new LookupTableTextureSceneLayer(GetTexture()));
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158
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159
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160 // TODO: why is windowing_ not copied??????
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161 cloned->CopyParameters(*this);
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162 cloned->minValue_ = minValue_;
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163 cloned->maxValue_ = maxValue_;
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164 cloned->lut_ = lut_;
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165
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166 return cloned.release();
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167 }
1179
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168
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169
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170 // Templatized function to speed up computations, by avoiding
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171 // testing conditions on each pixel
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172 template <bool IsApplyLog,
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173 Orthanc::PixelFormat TargetFormat>
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174 static void RenderInternal(Orthanc::ImageAccessor& target,
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175 const Orthanc::ImageAccessor& source,
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176 float minValue,
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177 float slope,
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178 const std::vector<uint8_t>& lut)
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179 {
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180 static const float LOG_NORMALIZATION = 255.0f / log(1.0f + 255.0f);
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181
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182 const unsigned int width = source.GetWidth();
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183 const unsigned int height = source.GetHeight();
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184
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185 for (unsigned int y = 0; y < height; y++)
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186 {
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187 const float* p = reinterpret_cast<const float*>(source.GetConstRow(y));
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188 uint8_t* q = reinterpret_cast<uint8_t*>(target.GetRow(y));
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189
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190 for (unsigned int x = 0; x < width; x++)
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191 {
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192 float v = (*p - minValue) * slope;
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193 if (v <= 0)
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194 {
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195 v = 0;
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196 }
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197 else if (v >= 255)
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198 {
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199 v = 255;
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200 }
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201
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202 if (IsApplyLog)
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203 {
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204 // https://theailearner.com/2019/01/01/log-transformation/
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205 v = LOG_NORMALIZATION * log(1.0f + static_cast<float>(v));
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206 }
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207
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208 assert(v >= 0.0f && v <= 255.0f);
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209
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210 uint8_t vv = static_cast<uint8_t>(v);
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211
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212 switch (TargetFormat)
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213 {
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214 case Orthanc::PixelFormat_BGRA32:
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215 // For Cairo surfaces
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216 q[0] = lut[4 * vv + 2]; // B
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217 q[1] = lut[4 * vv + 1]; // G
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218 q[2] = lut[4 * vv + 0]; // R
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219 q[3] = lut[4 * vv + 3]; // A
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220 break;
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221
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222 case Orthanc::PixelFormat_RGBA32:
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223 // For OpenGL
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224 q[0] = lut[4 * vv + 0]; // R
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225 q[1] = lut[4 * vv + 1]; // G
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226 q[2] = lut[4 * vv + 2]; // B
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227 q[3] = lut[4 * vv + 3]; // A
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228 break;
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229
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230 default:
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231 assert(0);
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232 }
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233
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234 p++;
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235 q += 4;
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236 }
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237 }
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238 }
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239
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240
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241 void LookupTableTextureSceneLayer::Render(Orthanc::ImageAccessor& target) const
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242 {
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243 assert(sizeof(float) == 4);
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244
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245 if (!HasTexture())
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246 {
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247 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls);
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248 }
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249
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250 const Orthanc::ImageAccessor& source = GetTexture();
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251
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252 if (source.GetFormat() != Orthanc::PixelFormat_Float32 ||
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253 (target.GetFormat() != Orthanc::PixelFormat_RGBA32 &&
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254 target.GetFormat() != Orthanc::PixelFormat_BGRA32))
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255 {
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256 throw Orthanc::OrthancException(Orthanc::ErrorCode_IncompatibleImageFormat);
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257 }
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258
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259 if (source.GetWidth() != target.GetWidth() ||
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260 source.GetHeight() != target.GetHeight())
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261 {
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262 throw Orthanc::OrthancException(Orthanc::ErrorCode_IncompatibleImageSize);
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263 }
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264
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265 const float minValue = GetMinValue();
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266 float slope;
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267
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268 if (GetMinValue() >= GetMaxValue())
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269 {
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270 slope = 0;
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271 }
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272 else
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273 {
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274 slope = 256.0f / (GetMaxValue() - GetMinValue());
177e7d431cd1 log scale in textures, remove redundant code for LUTs
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275 }
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276
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277 const std::vector<uint8_t>& lut = GetLookupTable();
177e7d431cd1 log scale in textures, remove redundant code for LUTs
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278 if (lut.size() != 4 * 256)
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279 {
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280 throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError);
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281 }
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282
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283 switch (target.GetFormat())
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284 {
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285 case Orthanc::PixelFormat_RGBA32:
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286 if (applyLog_)
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287 {
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288 RenderInternal<true, Orthanc::PixelFormat_RGBA32>(target, source, minValue, slope, lut);
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289 }
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290 else
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291 {
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292 RenderInternal<false, Orthanc::PixelFormat_RGBA32>(target, source, minValue, slope, lut);
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293 }
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294 break;
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295
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296 case Orthanc::PixelFormat_BGRA32:
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297 if (applyLog_)
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298 {
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299 RenderInternal<true, Orthanc::PixelFormat_BGRA32>(target, source, minValue, slope, lut);
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300 }
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301 else
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302 {
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303 RenderInternal<false, Orthanc::PixelFormat_BGRA32>(target, source, minValue, slope, lut);
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304 }
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305 break;
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306
177e7d431cd1 log scale in textures, remove redundant code for LUTs
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307 default:
177e7d431cd1 log scale in textures, remove redundant code for LUTs
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308 throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError);
177e7d431cd1 log scale in textures, remove redundant code for LUTs
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309 }
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310 }
768
55411e7da2f7 LookupTableTextureSceneLayer
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parents:
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311 }