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annotate OrthancStone/Sources/Scene2D/LookupTableTextureSceneLayer.cpp @ 1640:52b8b96cb55f

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cleaning namespaces
author Sebastien Jodogne <s.jodogne@gmail.com>
date Tue, 10 Nov 2020 16:55:22 +0100
parents 59f95b9ea858
children 9ac2a65d4172
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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 Lesser 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 * Lesser 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 Lesser General Public
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18 * License along with this program. If not, see
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19 * <http://www.gnu.org/licenses/>.
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20 **/
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22
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23 #include "LookupTableTextureSceneLayer.h"
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24
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25 #include <Images/Image.h>
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26 #include <Images/ImageProcessing.h>
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27 #include <Logging.h>
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28 #include <OrthancException.h>
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29
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30 namespace OrthancStone
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31 {
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32 LookupTableTextureSceneLayer::LookupTableTextureSceneLayer(const Orthanc::ImageAccessor& texture) :
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33 applyLog_(false)
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34 {
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35 {
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36 std::unique_ptr<Orthanc::ImageAccessor> t(
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37 new Orthanc::Image(Orthanc::PixelFormat_Float32,
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38 texture.GetWidth(),
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39 texture.GetHeight(),
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40 false));
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41
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42 Orthanc::ImageProcessing::Convert(*t, texture);
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43 SetTexture(t.release());
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44 }
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45
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46 SetLookupTableGrayscale(); // simple ramp between 0 and 255
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47 SetRange(0, 1);
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48 }
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50
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51 void LookupTableTextureSceneLayer::SetLookupTableGrayscale()
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52 {
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53 std::vector<uint8_t> rgb(3 * 256);
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54
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55 for (size_t i = 0; i < 256; i++)
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56 {
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57 rgb[3 * i] = static_cast<uint8_t>(i);
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58 rgb[3 * i + 1] = static_cast<uint8_t>(i);
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59 rgb[3 * i + 2] = static_cast<uint8_t>(i);
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60 }
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61
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62 SetLookupTableRgb(rgb);
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63 }
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65
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66 void LookupTableTextureSceneLayer::SetLookupTableRgb(const std::vector<uint8_t>& lut)
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67 {
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68 if (lut.size() != 3 * 256)
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69 {
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70 throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError);
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71 }
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72
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73 lut_.resize(4 * 256);
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74
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75 for (size_t i = 0; i < 256; i++)
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76 {
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77 // Premultiplied alpha
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78
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79 if (i == 0)
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80 {
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81 // Make zero transparent
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82 lut_[4 * i] = 0; // R
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83 lut_[4 * i + 1] = 0; // G
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84 lut_[4 * i + 2] = 0; // B
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85 lut_[4 * i + 3] = 0; // A
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86 }
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87 else
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88 {
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89 float a = static_cast<float>(i) / 255.0f;
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90
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91 float r = static_cast<float>(lut[3 * i]) * a;
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92 float g = static_cast<float>(lut[3 * i + 1]) * a;
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93 float b = static_cast<float>(lut[3 * i + 2]) * a;
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94
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95 lut_[4 * i] = static_cast<uint8_t>(std::floor(r));
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96 lut_[4 * i + 1] = static_cast<uint8_t>(std::floor(g));
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97 lut_[4 * i + 2] = static_cast<uint8_t>(std::floor(b));
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98 lut_[4 * i + 3] = static_cast<uint8_t>(std::floor(a * 255.0f));
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99 }
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100 }
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101
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102 IncrementRevision();
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103 }
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104
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105
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106 void LookupTableTextureSceneLayer::SetLookupTable(const std::vector<uint8_t>& lut)
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107 {
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108 if (lut.size() == 4 * 256)
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109 {
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110 lut_ = lut;
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111 IncrementRevision();
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112 }
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113 else if (lut.size() == 3 * 256)
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114 {
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115 SetLookupTableRgb(lut);
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116 }
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117 else
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118 {
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119 throw Orthanc::OrthancException(Orthanc::ErrorCode_ParameterOutOfRange);
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120 }
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121 }
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122
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123 void LookupTableTextureSceneLayer::SetRange(float minValue,
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124 float maxValue)
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125 {
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126 if (minValue > maxValue)
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127 {
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128 throw Orthanc::OrthancException(Orthanc::ErrorCode_ParameterOutOfRange);
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129 }
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130 else
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131 {
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132 minValue_ = minValue;
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133 maxValue_ = maxValue;
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134 IncrementRevision();
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135 }
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136 }
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137
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138 void LookupTableTextureSceneLayer::SetApplyLog(bool apply)
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139 {
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140 applyLog_ = apply;
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141 IncrementRevision();
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142 }
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143
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144 void LookupTableTextureSceneLayer::FitRange()
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145 {
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146 Orthanc::ImageProcessing::GetMinMaxFloatValue(minValue_, maxValue_, GetTexture());
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147 assert(minValue_ <= maxValue_);
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148 // TODO: debug to be removed
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149 if (fabs(maxValue_ - minValue_) < 0.0001) {
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150 LOG(INFO) << "LookupTableTextureSceneLayer::FitRange(): minValue_ = " << minValue_ << " maxValue_ = " << maxValue_;
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151 }
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152 IncrementRevision();
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153 }
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154
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155
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156 ISceneLayer* LookupTableTextureSceneLayer::Clone() const
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157 {
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158 std::unique_ptr<LookupTableTextureSceneLayer> cloned
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159 (new LookupTableTextureSceneLayer(GetTexture()));
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160
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161
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162 // TODO: why is windowing_ not copied??????
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163 cloned->CopyParameters(*this);
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164 cloned->minValue_ = minValue_;
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165 cloned->maxValue_ = maxValue_;
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166 cloned->lut_ = lut_;
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167
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168 return cloned.release();
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169 }
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170
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171
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172 // Templatized function to speed up computations, by avoiding
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173 // testing conditions on each pixel
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174 template <bool IsApplyLog,
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175 Orthanc::PixelFormat TargetFormat>
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176 static void RenderInternal(Orthanc::ImageAccessor& target,
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177 const Orthanc::ImageAccessor& source,
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178 float minValue,
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179 float slope,
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180 const std::vector<uint8_t>& lut)
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181 {
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182 static const float LOG_NORMALIZATION = 255.0f / log(1.0f + 255.0f);
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183
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184 const unsigned int width = source.GetWidth();
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185 const unsigned int height = source.GetHeight();
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186
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187 for (unsigned int y = 0; y < height; y++)
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188 {
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189 const float* p = reinterpret_cast<const float*>(source.GetConstRow(y));
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190 uint8_t* q = reinterpret_cast<uint8_t*>(target.GetRow(y));
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191
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192 for (unsigned int x = 0; x < width; x++)
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193 {
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194 float v = (*p - minValue) * slope;
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195 if (v <= 0)
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196 {
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197 v = 0;
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198 }
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199 else if (v >= 255)
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200 {
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201 v = 255;
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202 }
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203
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204 if (IsApplyLog)
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205 {
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206 // https://theailearner.com/2019/01/01/log-transformation/
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207 v = LOG_NORMALIZATION * log(1.0f + static_cast<float>(v));
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208 }
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209
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210 assert(v >= 0.0f && v <= 255.0f);
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211
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212 uint8_t vv = static_cast<uint8_t>(v);
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213
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214 switch (TargetFormat)
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215 {
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216 case Orthanc::PixelFormat_BGRA32:
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217 // For Cairo surfaces
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218 q[0] = lut[4 * vv + 2]; // B
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219 q[1] = lut[4 * vv + 1]; // G
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220 q[2] = lut[4 * vv + 0]; // R
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221 q[3] = lut[4 * vv + 3]; // A
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222 break;
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223
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224 case Orthanc::PixelFormat_RGBA32:
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225 // For OpenGL
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226 q[0] = lut[4 * vv + 0]; // R
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227 q[1] = lut[4 * vv + 1]; // G
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228 q[2] = lut[4 * vv + 2]; // B
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229 q[3] = lut[4 * vv + 3]; // A
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230 break;
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231
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232 default:
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233 assert(0);
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234 }
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235
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236 p++;
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237 q += 4;
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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
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243 void LookupTableTextureSceneLayer::Render(Orthanc::ImageAccessor& target) const
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244 {
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245 assert(sizeof(float) == 4);
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246
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247 if (!HasTexture())
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248 {
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249 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls);
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250 }
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251
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252 const Orthanc::ImageAccessor& source = GetTexture();
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253
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254 if (source.GetFormat() != Orthanc::PixelFormat_Float32 ||
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255 (target.GetFormat() != Orthanc::PixelFormat_RGBA32 &&
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256 target.GetFormat() != Orthanc::PixelFormat_BGRA32))
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257 {
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258 throw Orthanc::OrthancException(Orthanc::ErrorCode_IncompatibleImageFormat);
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259 }
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260
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261 if (source.GetWidth() != target.GetWidth() ||
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262 source.GetHeight() != target.GetHeight())
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263 {
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264 throw Orthanc::OrthancException(Orthanc::ErrorCode_IncompatibleImageSize);
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265 }
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266
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267 const float minValue = GetMinValue();
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268 float slope;
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269
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270 if (GetMinValue() >= GetMaxValue())
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271 {
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272 slope = 0;
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273 }
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274 else
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275 {
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276 slope = 256.0f / (GetMaxValue() - GetMinValue());
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277 }
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278
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279 const std::vector<uint8_t>& lut = GetLookupTable();
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280 if (lut.size() != 4 * 256)
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281 {
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282 throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError);
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283 }
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284
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285 switch (target.GetFormat())
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286 {
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287 case Orthanc::PixelFormat_RGBA32:
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288 if (applyLog_)
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289 {
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290 RenderInternal<true, Orthanc::PixelFormat_RGBA32>(target, source, minValue, slope, lut);
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291 }
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292 else
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293 {
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294 RenderInternal<false, Orthanc::PixelFormat_RGBA32>(target, source, minValue, slope, lut);
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295 }
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296 break;
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297
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298 case Orthanc::PixelFormat_BGRA32:
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299 if (applyLog_)
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300 {
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301 RenderInternal<true, Orthanc::PixelFormat_BGRA32>(target, source, minValue, slope, lut);
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302 }
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303 else
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304 {
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305 RenderInternal<false, Orthanc::PixelFormat_BGRA32>(target, source, minValue, slope, lut);
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306 }
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307 break;
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308
177e7d431cd1 log scale in textures, remove redundant code for LUTs
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309 default:
177e7d431cd1 log scale in textures, remove redundant code for LUTs
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310 throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError);
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311 }
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312 }
768
55411e7da2f7 LookupTableTextureSceneLayer
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parents:
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313 }