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annotate OrthancStone/Sources/Scene2D/LookupTableTextureSceneLayer.cpp @ 1928:c73e696967b0 StoneWebViewer-2.3

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StoneWebViewer-2.3
author Sebastien Jodogne <s.jodogne@gmail.com>
date Thu, 24 Mar 2022 09:08:51 +0100
parents ed4831e08961
children 07964689cb0b
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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) 2017-2022 Osimis S.A., Belgium
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6 * Copyright (C) 2021-2022 Sebastien Jodogne, ICTEAM UCLouvain, Belgium
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7 *
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8 * This program is free software: you can redistribute it and/or
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9 * modify it under the terms of the GNU Lesser General Public License
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10 * as published by the Free Software Foundation, either version 3 of
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11 * the License, or (at your option) any later version.
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12 *
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13 * This program is distributed in the hope that it will be useful, but
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14 * WITHOUT ANY WARRANTY; without even the implied warranty of
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15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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16 * Lesser General Public License for more details.
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17 *
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18 * You should have received a copy of the GNU Lesser General Public
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19 * License along with this program. If not, see
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20 * <http://www.gnu.org/licenses/>.
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21 **/
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23
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24 #include "LookupTableTextureSceneLayer.h"
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25
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26 #include <Images/Image.h>
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27 #include <Images/ImageProcessing.h>
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28 #include <Logging.h>
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29 #include <OrthancException.h>
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30
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31 namespace OrthancStone
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32 {
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33 LookupTableTextureSceneLayer::LookupTableTextureSceneLayer(const Orthanc::ImageAccessor& texture) :
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34 applyLog_(false)
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35 {
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36 if (texture.GetFormat() == Orthanc::PixelFormat_Float32)
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37 {
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38 SetTexture(Orthanc::Image::Clone(texture));
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39 }
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40 else
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41 {
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42 std::unique_ptr<Orthanc::ImageAccessor> t(
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43 new Orthanc::Image(Orthanc::PixelFormat_Float32, texture.GetWidth(), texture.GetHeight(), false));
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44 Orthanc::ImageProcessing::Convert(*t, texture);
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45 SetTexture(t.release());
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46 }
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47
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48 SetLookupTableGrayscale(); // simple ramp between 0 and 255
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49 SetRange(0, 1);
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50 }
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52
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53 void LookupTableTextureSceneLayer::SetLookupTableGrayscale()
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54 {
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55 std::vector<uint8_t> rgb(3 * 256);
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56
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57 for (size_t i = 0; i < 256; i++)
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58 {
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59 rgb[3 * i] = static_cast<uint8_t>(i);
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60 rgb[3 * i + 1] = static_cast<uint8_t>(i);
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61 rgb[3 * i + 2] = static_cast<uint8_t>(i);
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62 }
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63
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64 SetLookupTableRgb(rgb);
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65 }
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67
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68 void LookupTableTextureSceneLayer::SetLookupTableRgb(const std::vector<uint8_t>& lut)
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69 {
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70 if (lut.size() != 3 * 256)
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71 {
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72 throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError);
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73 }
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74
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75 lut_.resize(4 * 256);
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76
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77 for (size_t i = 0; i < 256; i++)
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78 {
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79 // Premultiplied alpha
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80
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81 if (i == 0)
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82 {
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83 // Make zero transparent
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84 lut_[4 * i] = 0; // R
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85 lut_[4 * i + 1] = 0; // G
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86 lut_[4 * i + 2] = 0; // B
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87 lut_[4 * i + 3] = 0; // A
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88 }
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89 else
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90 {
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91 float a = static_cast<float>(i) / 255.0f;
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92
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93 float r = static_cast<float>(lut[3 * i]) * a;
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94 float g = static_cast<float>(lut[3 * i + 1]) * a;
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95 float b = static_cast<float>(lut[3 * i + 2]) * a;
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96
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97 lut_[4 * i] = static_cast<uint8_t>(std::floor(r));
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98 lut_[4 * i + 1] = static_cast<uint8_t>(std::floor(g));
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99 lut_[4 * i + 2] = static_cast<uint8_t>(std::floor(b));
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100 lut_[4 * i + 3] = static_cast<uint8_t>(std::floor(a * 255.0f));
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101 }
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102 }
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103
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104 IncrementRevision();
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105 }
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106
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107
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108 void LookupTableTextureSceneLayer::SetLookupTable(const std::vector<uint8_t>& lut)
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109 {
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110 if (lut.size() == 4 * 256)
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111 {
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112 lut_ = lut;
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113 IncrementRevision();
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114 }
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115 else if (lut.size() == 3 * 256)
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116 {
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117 SetLookupTableRgb(lut);
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118 }
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119 else
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120 {
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121 throw Orthanc::OrthancException(Orthanc::ErrorCode_ParameterOutOfRange);
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122 }
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123 }
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124
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125 void LookupTableTextureSceneLayer::SetRange(float minValue,
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126 float maxValue)
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127 {
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128 if (minValue > maxValue)
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129 {
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130 throw Orthanc::OrthancException(Orthanc::ErrorCode_ParameterOutOfRange);
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131 }
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132 else
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133 {
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134 minValue_ = minValue;
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135 maxValue_ = maxValue;
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136 IncrementRevision();
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137 }
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138 }
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139
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140 void LookupTableTextureSceneLayer::SetApplyLog(bool apply)
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141 {
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142 applyLog_ = apply;
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143 IncrementRevision();
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144 }
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145
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146 void LookupTableTextureSceneLayer::FitRange()
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147 {
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148 Orthanc::ImageProcessing::GetMinMaxFloatValue(minValue_, maxValue_, GetTexture());
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149 assert(minValue_ <= maxValue_);
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150 // TODO: debug to be removed
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151 if (fabs(maxValue_ - minValue_) < 0.0001) {
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152 LOG(TRACE) << "LookupTableTextureSceneLayer::FitRange(): minValue_ = " << minValue_ << " maxValue_ = " << maxValue_;
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153 }
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154 IncrementRevision();
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155 }
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156
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157
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158 ISceneLayer* LookupTableTextureSceneLayer::Clone() const
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159 {
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160 std::unique_ptr<LookupTableTextureSceneLayer> cloned
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161 (new LookupTableTextureSceneLayer(GetTexture()));
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162
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163
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164 // TODO: why is windowing_ not copied??????
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165 cloned->CopyParameters(*this);
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166 cloned->minValue_ = minValue_;
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167 cloned->maxValue_ = maxValue_;
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168 cloned->lut_ = lut_;
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169
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170 return cloned.release();
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171 }
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172
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173
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174 // Templatized function to speed up computations, by avoiding
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175 // testing conditions on each pixel
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176 template <bool IsApplyLog,
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177 Orthanc::PixelFormat TargetFormat>
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178 static void RenderInternal(Orthanc::ImageAccessor& target,
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179 const Orthanc::ImageAccessor& source,
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180 float minValue,
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181 float slope,
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182 const std::vector<uint8_t>& lut)
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183 {
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184 static const float LOG_NORMALIZATION = 255.0f / log(1.0f + 255.0f);
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185
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186 const unsigned int width = source.GetWidth();
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187 const unsigned int height = source.GetHeight();
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188
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189 for (unsigned int y = 0; y < height; y++)
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190 {
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191 const float* p = reinterpret_cast<const float*>(source.GetConstRow(y));
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192 uint8_t* q = reinterpret_cast<uint8_t*>(target.GetRow(y));
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193
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194 for (unsigned int x = 0; x < width; x++)
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195 {
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196 float v = (*p - minValue) * slope;
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197 if (v <= 0)
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198 {
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199 v = 0;
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200 }
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201 else if (v >= 255)
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202 {
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203 v = 255;
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204 }
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205
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206 if (IsApplyLog)
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207 {
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208 // https://theailearner.com/2019/01/01/log-transformation/
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209 v = LOG_NORMALIZATION * log(1.0f + static_cast<float>(v));
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210 }
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211
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212 assert(v >= 0.0f && v <= 255.0f);
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213
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214 uint8_t vv = static_cast<uint8_t>(v);
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215
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216 switch (TargetFormat)
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217 {
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218 case Orthanc::PixelFormat_BGRA32:
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219 // For Cairo surfaces
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220 q[0] = lut[4 * vv + 2]; // B
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221 q[1] = lut[4 * vv + 1]; // G
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222 q[2] = lut[4 * vv + 0]; // R
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223 q[3] = lut[4 * vv + 3]; // A
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224 break;
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225
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226 case Orthanc::PixelFormat_RGBA32:
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227 // For OpenGL
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228 q[0] = lut[4 * vv + 0]; // R
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229 q[1] = lut[4 * vv + 1]; // G
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230 q[2] = lut[4 * vv + 2]; // B
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231 q[3] = lut[4 * vv + 3]; // A
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232 break;
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233
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234 default:
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235 assert(0);
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236 }
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237
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238 p++;
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239 q += 4;
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240 }
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241 }
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242 }
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243
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244
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245 void LookupTableTextureSceneLayer::Render(Orthanc::ImageAccessor& target) const
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246 {
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247 assert(sizeof(float) == 4);
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248
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249 if (!HasTexture())
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250 {
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251 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls);
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252 }
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253
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254 const Orthanc::ImageAccessor& source = GetTexture();
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255
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256 if (source.GetFormat() != Orthanc::PixelFormat_Float32 ||
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257 (target.GetFormat() != Orthanc::PixelFormat_RGBA32 &&
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258 target.GetFormat() != Orthanc::PixelFormat_BGRA32))
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259 {
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260 throw Orthanc::OrthancException(Orthanc::ErrorCode_IncompatibleImageFormat);
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261 }
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262
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263 if (source.GetWidth() != target.GetWidth() ||
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264 source.GetHeight() != target.GetHeight())
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265 {
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266 throw Orthanc::OrthancException(Orthanc::ErrorCode_IncompatibleImageSize);
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267 }
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268
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269 const float minValue = GetMinValue();
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270 float slope;
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271
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272 if (GetMinValue() >= GetMaxValue())
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273 {
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274 slope = 0;
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275 }
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276 else
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277 {
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278 slope = 256.0f / (GetMaxValue() - GetMinValue());
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279 }
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280
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281 const std::vector<uint8_t>& lut = GetLookupTable();
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282 if (lut.size() != 4 * 256)
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283 {
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284 throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError);
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285 }
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286
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287 switch (target.GetFormat())
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288 {
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289 case Orthanc::PixelFormat_RGBA32:
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290 if (applyLog_)
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291 {
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292 RenderInternal<true, Orthanc::PixelFormat_RGBA32>(target, source, minValue, slope, lut);
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293 }
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294 else
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295 {
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296 RenderInternal<false, Orthanc::PixelFormat_RGBA32>(target, source, minValue, slope, lut);
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297 }
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298 break;
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299
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300 case Orthanc::PixelFormat_BGRA32:
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301 if (applyLog_)
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302 {
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303 RenderInternal<true, Orthanc::PixelFormat_BGRA32>(target, source, minValue, slope, lut);
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304 }
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305 else
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306 {
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307 RenderInternal<false, Orthanc::PixelFormat_BGRA32>(target, source, minValue, slope, lut);
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308 }
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309 break;
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310
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311 default:
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312 throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError);
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313 }
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314 }
768
55411e7da2f7 LookupTableTextureSceneLayer
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parents:
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315 }