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1 /**
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2 * Orthanc - A Lightweight, RESTful DICOM Store
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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 *
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6 * This program is free software: you can redistribute it and/or
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7 * modify it under the terms of the GNU Affero General Public License
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8 * as published by the Free Software Foundation, either version 3 of
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9 * the License, or (at your option) any later version.
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10 *
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11 * This program is distributed in the hope that it will be useful, but
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12 * WITHOUT ANY WARRANTY; without even the implied warranty of
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13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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14 * Affero General Public License for more details.
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15 *
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16 * You should have received a copy of the GNU Affero General Public License
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17 * along with this program. If not, see <http://www.gnu.org/licenses/>.
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18 **/
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19
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20
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21 #include "ImageToolbox.h"
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22
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23 #include "Jpeg2000Reader.h"
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24 #include "Jpeg2000Writer.h"
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25
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26 #include "Orthanc/Core/OrthancException.h"
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27 #include "Orthanc/Core/Images/ImageProcessing.h"
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28 #include "Orthanc/Core/Images/PngReader.h"
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29 #include "Orthanc/Core/Images/PngWriter.h"
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30 #include "Orthanc/Core/Images/JpegReader.h"
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31 #include "Orthanc/Core/Images/JpegWriter.h"
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32 #include "Orthanc/Core/Logging.h"
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33
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34 #include <string.h>
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35 #include <memory>
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36
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37
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38 namespace OrthancWSI
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39 {
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40 namespace ImageToolbox
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41 {
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42 Orthanc::ImageAccessor* Allocate(Orthanc::PixelFormat format,
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43 unsigned int width,
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44 unsigned int height)
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45 {
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46 return new Orthanc::Image(format, width, height, false);
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47 }
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48
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49
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50 void Embed(Orthanc::ImageAccessor& target,
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51 const Orthanc::ImageAccessor& source,
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52 unsigned int x,
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53 unsigned int y)
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54 {
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55 if (target.GetFormat() != source.GetFormat())
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56 {
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57 throw Orthanc::OrthancException(Orthanc::ErrorCode_IncompatibleImageFormat);
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58 }
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59
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60 if (x >= target.GetWidth() ||
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61 y >= target.GetHeight())
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62 {
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63 return;
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64 }
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65
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66 unsigned int h = std::min(source.GetHeight(), target.GetHeight() - y);
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67 unsigned int w = std::min(source.GetWidth(), target.GetWidth() - x);
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68
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69 Orthanc::ImageAccessor targetRegion = target.GetRegion(x, y, w, h);
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70 Orthanc::ImageAccessor sourceRegion = source.GetRegion(0, 0, w, h);
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71 Orthanc::ImageProcessing::Copy(targetRegion, sourceRegion);
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72 }
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73
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74
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75
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76 void Set(Orthanc::ImageAccessor& image,
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77 uint8_t r,
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78 uint8_t g,
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79 uint8_t b)
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80 {
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81 if (image.GetWidth() == 0 ||
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82 image.GetHeight() == 0)
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83 {
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84 return;
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85 }
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86
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87 uint8_t grayscale = (2126 * static_cast<uint16_t>(r) +
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88 7152 * static_cast<uint16_t>(g) +
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89 0722 * static_cast<uint16_t>(b)) / 10000;
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90
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91 switch (image.GetFormat())
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92 {
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93 case Orthanc::PixelFormat_Grayscale8:
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94 {
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95 for (unsigned int y = 0; y < image.GetHeight(); y++)
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96 {
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97 memset(image.GetRow(y), grayscale, image.GetWidth());
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98 }
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99
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100 break;
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101 }
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102
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103 case Orthanc::PixelFormat_RGB24:
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104 {
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105 for (unsigned int y = 0; y < image.GetHeight(); y++)
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106 {
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107 uint8_t* p = reinterpret_cast<uint8_t*>(image.GetRow(y));
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108 for (unsigned int x = 0; x < image.GetWidth(); x++, p += 3)
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109 {
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110 p[0] = r;
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111 p[1] = g;
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112 p[2] = b;
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113 }
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114 }
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115
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116 break;
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117 }
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118
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119 default:
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120 throw Orthanc::OrthancException(Orthanc::ErrorCode_NotImplemented);
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121 }
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122 }
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123
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124
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125 Orthanc::ImageAccessor* DecodeTile(const std::string& source,
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126 ImageCompression compression)
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127 {
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128 switch (compression)
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129 {
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130 case ImageCompression_Png:
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131 {
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132 std::auto_ptr<Orthanc::PngReader> reader(new Orthanc::PngReader);
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133 reader->ReadFromMemory(source);
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134 return reader.release();
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135 }
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136
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137 case ImageCompression_Jpeg:
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138 {
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139 std::auto_ptr<Orthanc::JpegReader> reader(new Orthanc::JpegReader);
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140 reader->ReadFromMemory(source);
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141 return reader.release();
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142 }
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143
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144 case ImageCompression_Jpeg2000:
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145 {
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146 std::auto_ptr<Jpeg2000Reader> reader(new Jpeg2000Reader);
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147 reader->ReadFromMemory(source);
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148 return reader.release();
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149 }
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150
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151 default:
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152 throw Orthanc::OrthancException(Orthanc::ErrorCode_ParameterOutOfRange);
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153 }
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154 }
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155
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156
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157 void EncodeTile(std::string& target,
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158 const Orthanc::ImageAccessor& source,
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159 ImageCompression compression,
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160 uint8_t quality)
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161 {
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162 if (compression == ImageCompression_None)
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163 {
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164 unsigned int pitch = GetBytesPerPixel(source.GetFormat()) * source.GetWidth();
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165 target.resize(pitch * source.GetHeight());
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166
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167 for (unsigned int i = 0; i < source.GetHeight(); i++)
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168 {
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169 memcpy(&target[i * pitch], source.GetConstRow(i), pitch);
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170 }
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171 }
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172 else
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173 {
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174 std::auto_ptr<Orthanc::IImageWriter> writer;
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175
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176 switch (compression)
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177 {
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178 case ImageCompression_Png:
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179 writer.reset(new Orthanc::PngWriter);
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180 break;
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181
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182 case ImageCompression_Jpeg:
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183 writer.reset(new Orthanc::JpegWriter);
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184 dynamic_cast<Orthanc::JpegWriter&>(*writer).SetQuality(quality);
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185 break;
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186
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187 case ImageCompression_Jpeg2000:
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188 writer.reset(new Jpeg2000Writer);
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189 break;
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190
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191 default:
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192 throw Orthanc::OrthancException(Orthanc::ErrorCode_ParameterOutOfRange);
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193 }
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194
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195 writer->WriteToMemory(target, source);
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196 }
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197 }
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198
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199
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200 void ChangeTileCompression(std::string& target,
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201 const std::string& source,
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202 ImageCompression sourceCompression,
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203 ImageCompression targetCompression,
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204 uint8_t quality)
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205 {
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206 if (sourceCompression == targetCompression)
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207 {
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208 target = source;
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209 }
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210 else
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211 {
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212 std::auto_ptr<Orthanc::ImageAccessor> decoded(DecodeTile(source, sourceCompression));
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213 EncodeTile(target, *decoded, targetCompression, quality);
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214 }
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215 }
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216
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217
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218 static uint8_t GetPixelValue(const Orthanc::ImageAccessor& source,
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219 unsigned int x,
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220 unsigned int y,
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221 unsigned int channel,
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222 int offsetX,
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223 int offsetY)
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224 {
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225 assert(channel < source.GetBytesPerPixel());
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226 assert(source.GetFormat() == Orthanc::PixelFormat_Grayscale8 ||
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227 source.GetFormat() == Orthanc::PixelFormat_RGB24 ||
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228 source.GetFormat() == Orthanc::PixelFormat_RGBA32); // 16bpp is unsupported
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229
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230 if (static_cast<int>(x) + offsetX < 0)
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231 {
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232 x = 0;
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233 }
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234 else
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235 {
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236 x += offsetX;
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237 if (x >= source.GetWidth())
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238 {
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239 x = source.GetWidth() - 1;
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240 }
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241 }
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242
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243 if (static_cast<int>(y) + offsetY < 0)
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244 {
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245 y = 0;
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246 }
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247 else
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248 {
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249 y += offsetY;
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250 if (y >= source.GetHeight())
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251 {
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252 y = source.GetHeight() - 1;
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253 }
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254 }
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255
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256 return *(reinterpret_cast<const uint8_t*>(source.GetConstBuffer()) +
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257 y * source.GetPitch() + x * source.GetBytesPerPixel() + channel);
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258 }
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259
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260
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261 static uint8_t SmoothPixelValue(const Orthanc::ImageAccessor& source,
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262 unsigned int x,
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263 unsigned int y,
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264 unsigned int channel)
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265 {
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266 static const uint32_t kernel[5] = { 1, 4, 6, 4, 1 };
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267 static const uint32_t normalization = 2 * (1 + 4 + 6 + 4 + 1);
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268
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269 uint32_t accumulator = 0;
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270
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271 // Horizontal smoothing
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272 for (int offset = -2; offset <= 2; offset++)
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273 {
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274 accumulator += kernel[offset + 2] * GetPixelValue(source, x, y, channel, offset, 0);
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275 }
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276
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277 // Vertical smoothing
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278 for (int offset = -2; offset <= 2; offset++)
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279 {
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280 accumulator += kernel[offset + 2] * GetPixelValue(source, x, y, channel, 0, offset);
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281 }
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282
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283 return static_cast<uint8_t>(accumulator / normalization);
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284 }
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285
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286
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287 Orthanc::ImageAccessor* Halve(const Orthanc::ImageAccessor& source,
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288 bool smooth)
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289 {
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290 if (source.GetWidth() % 2 == 1 ||
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291 source.GetHeight() % 2 == 1)
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292 {
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293 throw Orthanc::OrthancException(Orthanc::ErrorCode_IncompatibleImageSize);
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294 }
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295
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296 if (source.GetFormat() != Orthanc::PixelFormat_Grayscale8 &&
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297 source.GetFormat() != Orthanc::PixelFormat_RGB24 &&
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298 source.GetFormat() != Orthanc::PixelFormat_RGBA32) // 16bpp is not supported (*)
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299 {
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300 throw Orthanc::OrthancException(Orthanc::ErrorCode_NotImplemented);
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301 }
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302
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303 unsigned int channelsCount = source.GetBytesPerPixel(); // OK tx (*)
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304
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305 std::auto_ptr<Orthanc::ImageAccessor> result(Allocate(source.GetFormat(),
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306 source.GetWidth() / 2,
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307 source.GetHeight() / 2));
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308
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309 for (unsigned int y = 0; y < source.GetHeight() / 2; y++)
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310 {
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311 uint8_t* q = reinterpret_cast<uint8_t*>(result->GetRow(y));
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312
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313 for (unsigned int x = 0; x < source.GetWidth() / 2; x++, q += 3)
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314 {
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315 for (unsigned int c = 0; c < channelsCount; c++)
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316 {
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317 if (smooth)
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318 {
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319 q[c] = SmoothPixelValue(source, 2 * x, 2 * y, c);
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320 }
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321 else
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322 {
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323 q[c] = GetPixelValue(source, 2 * x, 2 * y, c, 0, 0);
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324 }
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325 }
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326 }
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327 }
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328
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329 return result.release();
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330 }
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331
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332
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333 Orthanc::ImageAccessor* Clone(const Orthanc::ImageAccessor& accessor)
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334 {
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335 std::auto_ptr<Orthanc::ImageAccessor> result(Allocate(accessor.GetFormat(),
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336 accessor.GetWidth(),
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337 accessor.GetHeight()));
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338 Embed(*result, accessor, 0, 0);
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339
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340 return result.release();
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341 }
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342
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343
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344 Orthanc::ImageAccessor* Render(ITiledPyramid& pyramid,
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345 unsigned int level)
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346 {
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347 std::auto_ptr<Orthanc::ImageAccessor> result(Allocate(pyramid.GetPixelFormat(),
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348 pyramid.GetLevelWidth(level),
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349 pyramid.GetLevelHeight(level)));
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350
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351 LOG(INFO) << "Rendering a tiled image of size " << result->GetWidth() << "x" << result->GetHeight();
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352
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353 for (unsigned int y = 0; y < result->GetHeight(); y += pyramid.GetTileHeight())
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354 {
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355 for (unsigned int x = 0; x < result->GetWidth(); x += pyramid.GetTileWidth())
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356 {
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357 std::auto_ptr<Orthanc::ImageAccessor> tile(pyramid.DecodeTile(level,
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358 x / pyramid.GetTileWidth(),
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359 y / pyramid.GetTileHeight()));
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360 Embed(*result, *tile, x, y);
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361 }
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362 }
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363
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364 return result.release();
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365 }
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366 }
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367 }
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