Mercurial > hg > orthanc-stone
annotate Resources/Orthanc/Core/Images/PngWriter.cpp @ 202:e7f90aba3c97
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author | Sebastien Jodogne <s.jodogne@gmail.com> |
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date | Mon, 26 Mar 2018 18:10:34 +0200 |
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rev | line source |
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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 * Copyright (C) 2017-2018 Osimis S.A., Belgium |
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6 * |
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7 * This program is free software: you can redistribute it and/or |
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8 * modify it under the terms of the GNU General Public License as |
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9 * published by the Free Software Foundation, either version 3 of the |
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10 * License, or (at your option) any later version. |
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11 * |
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12 * In addition, as a special exception, the copyright holders of this |
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13 * program give permission to link the code of its release with the |
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14 * OpenSSL project's "OpenSSL" library (or with modified versions of it |
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15 * that use the same license as the "OpenSSL" library), and distribute |
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16 * the linked executables. You must obey the GNU General Public License |
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17 * in all respects for all of the code used other than "OpenSSL". If you |
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18 * modify file(s) with this exception, you may extend this exception to |
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19 * your version of the file(s), but you are not obligated to do so. If |
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20 * you do not wish to do so, delete this exception statement from your |
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21 * version. If you delete this exception statement from all source files |
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22 * in the program, then also delete it here. |
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23 * |
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24 * This program is distributed in the hope that it will be useful, but |
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25 * WITHOUT ANY WARRANTY; without even the implied warranty of |
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26 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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27 * General Public License for more details. |
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28 * |
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29 * You should have received a copy of the GNU General Public License |
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30 * along with this program. If not, see <http://www.gnu.org/licenses/>. |
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31 **/ |
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32 |
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33 |
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34 #include "../PrecompiledHeaders.h" |
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35 #include "PngWriter.h" |
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36 |
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37 #include <vector> |
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38 #include <stdint.h> |
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39 #include <png.h> |
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40 #include "../OrthancException.h" |
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41 #include "../ChunkedBuffer.h" |
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42 #include "../Toolbox.h" |
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43 |
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44 #if ORTHANC_SANDBOXED == 0 |
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45 # include "../SystemToolbox.h" |
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46 #endif |
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47 |
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48 |
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49 // http://www.libpng.org/pub/png/libpng-1.2.5-manual.html#section-4 |
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50 // http://zarb.org/~gc/html/libpng.html |
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51 /* |
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52 void write_row_callback(png_ptr, png_uint_32 row, int pass) |
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53 { |
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54 }*/ |
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55 |
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56 |
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57 |
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58 |
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59 /* bool isError_; |
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60 |
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61 // http://www.libpng.org/pub/png/book/chapter14.html#png.ch14.div.2 |
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62 |
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63 static void ErrorHandler(png_structp png, png_const_charp message) |
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64 { |
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65 printf("** [%s]\n", message); |
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66 |
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67 PngWriter* that = (PngWriter*) png_get_error_ptr(png); |
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68 that->isError_ = true; |
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69 printf("** %d\n", (int)that); |
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70 |
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71 //((PngWriter*) payload)->isError_ = true; |
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72 } |
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73 |
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74 static void WarningHandler(png_structp png, png_const_charp message) |
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75 { |
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76 printf("++ %d\n", (int)message); |
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77 }*/ |
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78 |
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79 |
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80 namespace Orthanc |
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81 { |
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82 struct PngWriter::PImpl |
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83 { |
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84 png_structp png_; |
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85 png_infop info_; |
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86 |
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87 // Filled by Prepare() |
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88 std::vector<uint8_t*> rows_; |
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89 int bitDepth_; |
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90 int colorType_; |
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91 }; |
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92 |
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93 |
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94 |
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95 PngWriter::PngWriter() : pimpl_(new PImpl) |
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96 { |
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97 pimpl_->png_ = NULL; |
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98 pimpl_->info_ = NULL; |
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99 |
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100 pimpl_->png_ = png_create_write_struct |
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101 (PNG_LIBPNG_VER_STRING, NULL, NULL, NULL); //this, ErrorHandler, WarningHandler); |
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102 if (!pimpl_->png_) |
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103 { |
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104 throw OrthancException(ErrorCode_NotEnoughMemory); |
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105 } |
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106 |
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107 pimpl_->info_ = png_create_info_struct(pimpl_->png_); |
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108 if (!pimpl_->info_) |
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109 { |
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110 png_destroy_write_struct(&pimpl_->png_, NULL); |
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111 throw OrthancException(ErrorCode_NotEnoughMemory); |
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112 } |
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113 } |
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114 |
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115 PngWriter::~PngWriter() |
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116 { |
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117 if (pimpl_->info_) |
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118 { |
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119 png_destroy_info_struct(pimpl_->png_, &pimpl_->info_); |
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120 } |
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121 |
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122 if (pimpl_->png_) |
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123 { |
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124 png_destroy_write_struct(&pimpl_->png_, NULL); |
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125 } |
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126 } |
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127 |
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128 |
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129 |
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130 void PngWriter::Prepare(unsigned int width, |
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131 unsigned int height, |
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132 unsigned int pitch, |
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133 PixelFormat format, |
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134 const void* buffer) |
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135 { |
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136 pimpl_->rows_.resize(height); |
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137 for (unsigned int y = 0; y < height; y++) |
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138 { |
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139 pimpl_->rows_[y] = const_cast<uint8_t*>(reinterpret_cast<const uint8_t*>(buffer)) + y * pitch; |
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140 } |
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141 |
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142 switch (format) |
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143 { |
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144 case PixelFormat_RGB24: |
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145 pimpl_->bitDepth_ = 8; |
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146 pimpl_->colorType_ = PNG_COLOR_TYPE_RGB; |
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147 break; |
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148 |
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149 case PixelFormat_RGBA32: |
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150 pimpl_->bitDepth_ = 8; |
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151 pimpl_->colorType_ = PNG_COLOR_TYPE_RGBA; |
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152 break; |
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153 |
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154 case PixelFormat_Grayscale8: |
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155 pimpl_->bitDepth_ = 8; |
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156 pimpl_->colorType_ = PNG_COLOR_TYPE_GRAY; |
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157 break; |
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158 |
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159 case PixelFormat_Grayscale16: |
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160 case PixelFormat_SignedGrayscale16: |
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161 pimpl_->bitDepth_ = 16; |
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162 pimpl_->colorType_ = PNG_COLOR_TYPE_GRAY; |
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163 break; |
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164 |
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165 default: |
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166 throw OrthancException(ErrorCode_NotImplemented); |
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167 } |
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168 } |
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169 |
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170 |
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171 void PngWriter::Compress(unsigned int width, |
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172 unsigned int height, |
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173 unsigned int pitch, |
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174 PixelFormat format) |
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175 { |
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176 png_set_IHDR(pimpl_->png_, pimpl_->info_, width, height, |
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177 pimpl_->bitDepth_, pimpl_->colorType_, PNG_INTERLACE_NONE, |
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178 PNG_COMPRESSION_TYPE_BASE, PNG_FILTER_TYPE_BASE); |
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179 |
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180 png_write_info(pimpl_->png_, pimpl_->info_); |
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181 |
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182 if (height > 0) |
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183 { |
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184 switch (format) |
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185 { |
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186 case PixelFormat_Grayscale16: |
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187 case PixelFormat_SignedGrayscale16: |
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188 { |
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189 int transforms = 0; |
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190 if (Toolbox::DetectEndianness() == Endianness_Little) |
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191 { |
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192 transforms = PNG_TRANSFORM_SWAP_ENDIAN; |
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193 } |
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194 |
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195 png_set_rows(pimpl_->png_, pimpl_->info_, &pimpl_->rows_[0]); |
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196 png_write_png(pimpl_->png_, pimpl_->info_, transforms, NULL); |
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197 |
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198 break; |
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199 } |
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200 |
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201 default: |
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202 png_write_image(pimpl_->png_, &pimpl_->rows_[0]); |
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203 } |
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204 } |
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205 |
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206 png_write_end(pimpl_->png_, NULL); |
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207 } |
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208 |
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209 |
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210 #if ORTHANC_SANDBOXED == 0 |
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211 void PngWriter::WriteToFileInternal(const std::string& filename, |
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212 unsigned int width, |
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213 unsigned int height, |
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214 unsigned int pitch, |
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215 PixelFormat format, |
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216 const void* buffer) |
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217 { |
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218 Prepare(width, height, pitch, format, buffer); |
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219 |
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220 FILE* fp = SystemToolbox::OpenFile(filename, FileMode_WriteBinary); |
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221 if (!fp) |
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222 { |
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223 throw OrthancException(ErrorCode_CannotWriteFile); |
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224 } |
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225 |
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226 png_init_io(pimpl_->png_, fp); |
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227 |
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228 if (setjmp(png_jmpbuf(pimpl_->png_))) |
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229 { |
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230 // Error during writing PNG |
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231 throw OrthancException(ErrorCode_CannotWriteFile); |
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232 } |
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233 |
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234 Compress(width, height, pitch, format); |
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235 |
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236 fclose(fp); |
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237 } |
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238 #endif |
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239 |
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240 |
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241 static void MemoryCallback(png_structp png_ptr, |
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242 png_bytep data, |
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243 png_size_t size) |
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244 { |
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245 ChunkedBuffer* buffer = reinterpret_cast<ChunkedBuffer*>(png_get_io_ptr(png_ptr)); |
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246 buffer->AddChunk(reinterpret_cast<const char*>(data), size); |
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247 } |
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248 |
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249 |
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250 |
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251 #if ORTHANC_SANDBOXED == 0 |
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252 void PngWriter::WriteToMemoryInternal(std::string& png, |
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253 unsigned int width, |
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254 unsigned int height, |
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255 unsigned int pitch, |
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256 PixelFormat format, |
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257 const void* buffer) |
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258 { |
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259 ChunkedBuffer chunks; |
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260 |
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261 Prepare(width, height, pitch, format, buffer); |
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262 |
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263 if (setjmp(png_jmpbuf(pimpl_->png_))) |
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264 { |
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265 // Error during writing PNG |
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266 throw OrthancException(ErrorCode_InternalError); |
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267 } |
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268 |
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269 png_set_write_fn(pimpl_->png_, &chunks, MemoryCallback, NULL); |
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270 |
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271 Compress(width, height, pitch, format); |
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272 |
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273 chunks.Flatten(png); |
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274 } |
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275 #endif |
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276 } |