Mercurial > hg > orthanc-stone

annotate Resources/Orthanc/Core/Images/JpegReader.cpp @ 202:e7f90aba3c97

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author Sebastien Jodogne <s.jodogne@gmail.com>
date Mon, 26 Mar 2018 18:10:34 +0200
parents 03afbee0cc7b
children
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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 "JpegReader.h"
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36
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37 #include "JpegErrorManager.h"
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38 #include "../OrthancException.h"
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39 #include "../Logging.h"
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40
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41 #if ORTHANC_SANDBOXED == 0
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42 # include "../SystemToolbox.h"
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43 #endif
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44
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45
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46 namespace Orthanc
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47 {
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48 static void Uncompress(struct jpeg_decompress_struct& cinfo,
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49 std::string& content,
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50 ImageAccessor& accessor)
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51 {
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52 jpeg_read_header(&cinfo, TRUE);
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53 jpeg_start_decompress(&cinfo);
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54
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55 PixelFormat format;
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56 if (cinfo.output_components == 1 &&
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57 cinfo.out_color_space == JCS_GRAYSCALE)
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58 {
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59 format = PixelFormat_Grayscale8;
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60 }
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61 else if (cinfo.output_components == 3 &&
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62 cinfo.out_color_space == JCS_RGB)
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63 {
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64 format = PixelFormat_RGB24;
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65 }
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66 else
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67 {
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68 throw OrthancException(ErrorCode_NotImplemented);
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69 }
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70
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71 unsigned int pitch = cinfo.output_width * cinfo.output_components;
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72
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73 /* Make a one-row-high sample array that will go away when done with image */
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74 JSAMPARRAY buffer = (*cinfo.mem->alloc_sarray) ((j_common_ptr) &cinfo, JPOOL_IMAGE, pitch, 1);
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75
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76 try
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77 {
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78 content.resize(pitch * cinfo.output_height);
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79 }
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80 catch (...)
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81 {
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82 throw OrthancException(ErrorCode_NotEnoughMemory);
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83 }
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84
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85 accessor.AssignWritable(format, cinfo.output_width, cinfo.output_height, pitch,
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86 content.empty() ? NULL : &content[0]);
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87
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88 uint8_t* target = reinterpret_cast<uint8_t*>(&content[0]);
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89 while (cinfo.output_scanline < cinfo.output_height)
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90 {
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91 jpeg_read_scanlines(&cinfo, buffer, 1);
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92 memcpy(target, buffer[0], pitch);
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93 target += pitch;
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94 }
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95
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96 // Everything went fine, "setjmp()" didn't get called
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97
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98 jpeg_finish_decompress(&cinfo);
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99 }
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100
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101
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102 #if ORTHANC_SANDBOXED == 0
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103 void JpegReader::ReadFromFile(const std::string& filename)
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104 {
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105 FILE* fp = SystemToolbox::OpenFile(filename, FileMode_ReadBinary);
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106 if (!fp)
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107 {
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108 throw OrthancException(ErrorCode_InexistentFile);
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109 }
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110
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111 struct jpeg_decompress_struct cinfo;
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112 memset(&cinfo, 0, sizeof(struct jpeg_decompress_struct));
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113
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114 Internals::JpegErrorManager jerr;
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115 cinfo.err = jerr.GetPublic();
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116
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117 if (setjmp(jerr.GetJumpBuffer()))
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118 {
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119 jpeg_destroy_decompress(&cinfo);
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120 fclose(fp);
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121 LOG(ERROR) << "Error during JPEG decoding: " << jerr.GetMessage();
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122 throw OrthancException(ErrorCode_InternalError);
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123 }
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124
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125 // Below this line, we are under the scope of a "setjmp"
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126
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127 jpeg_create_decompress(&cinfo);
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128 jpeg_stdio_src(&cinfo, fp);
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129
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130 try
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131 {
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132 Uncompress(cinfo, content_, *this);
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133 }
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134 catch (OrthancException&)
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135 {
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136 jpeg_destroy_decompress(&cinfo);
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137 fclose(fp);
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138 throw;
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139 }
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140
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141 jpeg_destroy_decompress(&cinfo);
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142 fclose(fp);
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143 }
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144 #endif
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145
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146
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147 void JpegReader::ReadFromMemory(const void* buffer,
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148 size_t size)
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149 {
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150 struct jpeg_decompress_struct cinfo;
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151 memset(&cinfo, 0, sizeof(struct jpeg_decompress_struct));
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152
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153 Internals::JpegErrorManager jerr;
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154 cinfo.err = jerr.GetPublic();
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155
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156 if (setjmp(jerr.GetJumpBuffer()))
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157 {
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158 jpeg_destroy_decompress(&cinfo);
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159 LOG(ERROR) << "Error during JPEG decoding: " << jerr.GetMessage();
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160 throw OrthancException(ErrorCode_InternalError);
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161 }
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162
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163 // Below this line, we are under the scope of a "setjmp"
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164 jpeg_create_decompress(&cinfo);
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165 jpeg_mem_src(&cinfo, const_cast<unsigned char*>(reinterpret_cast<const unsigned char*>(buffer)), size);
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166
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167 try
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168 {
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169 Uncompress(cinfo, content_, *this);
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170 }
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171 catch (OrthancException&)
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172 {
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173 jpeg_destroy_decompress(&cinfo);
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174 throw;
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175 }
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176
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177 jpeg_destroy_decompress(&cinfo);
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178 }
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179
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180
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181 void JpegReader::ReadFromMemory(const std::string& buffer)
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182 {
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183 if (buffer.empty())
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184 {
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185 ReadFromMemory(NULL, 0);
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186 }
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187 else
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188 {
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189 ReadFromMemory(buffer.c_str(), buffer.size());
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190 }
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191 }
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192 }