annotate Core/Images/JpegWriter.cpp @ 4031:e3b3af80732d

ServerResources, and moving EmbeddedResourceHttpHandler from Core to OrthancServer
author Sebastien Jodogne <s.jodogne@gmail.com>
date Tue, 09 Jun 2020 21:31:13 +0200
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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) 2017-2020 Osimis S.A., Belgium
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6 *
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7 * This program is free software: you can redistribute it and/or
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8 * modify it under the terms of the GNU 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 "JpegWriter.h"
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36
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37 #include "../OrthancException.h"
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38 #include "../Logging.h"
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39 #include "JpegErrorManager.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 #include <stdlib.h>
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46 #include <vector>
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47
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48 namespace Orthanc
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49 {
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50 static void GetLines(std::vector<uint8_t*>& lines,
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51 unsigned int height,
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52 unsigned int pitch,
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53 PixelFormat format,
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54 const void* buffer)
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55 {
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56 if (format != PixelFormat_Grayscale8 &&
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57 format != PixelFormat_RGB24)
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58 {
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59 throw OrthancException(ErrorCode_ParameterOutOfRange);
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60 }
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61
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62 lines.resize(height);
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63
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64 uint8_t* base = const_cast<uint8_t*>(reinterpret_cast<const uint8_t*>(buffer));
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65 for (unsigned int y = 0; y < height; y++)
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66 {
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67 lines[y] = base + static_cast<intptr_t>(y) * static_cast<intptr_t>(pitch);
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68 }
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69 }
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71
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72 static void Compress(struct jpeg_compress_struct& cinfo,
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73 std::vector<uint8_t*>& lines,
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74 unsigned int width,
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75 unsigned int height,
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76 PixelFormat format,
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77 uint8_t quality)
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78 {
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79 cinfo.image_width = width;
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80 cinfo.image_height = height;
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81
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82 switch (format)
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83 {
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84 case PixelFormat_Grayscale8:
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85 cinfo.input_components = 1;
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86 cinfo.in_color_space = JCS_GRAYSCALE;
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87 break;
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88
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89 case PixelFormat_RGB24:
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90 cinfo.input_components = 3;
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91 cinfo.in_color_space = JCS_RGB;
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92 break;
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93
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94 default:
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95 throw OrthancException(ErrorCode_InternalError);
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96 }
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97
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98 jpeg_set_defaults(&cinfo);
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99
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100 // The "static_cast" is necessary on OS X:
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101 // https://github.com/simonfuhrmann/mve/issues/371
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102 jpeg_set_quality(&cinfo, quality, static_cast<boolean>(true));
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103 jpeg_start_compress(&cinfo, static_cast<boolean>(true));
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104
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105 jpeg_write_scanlines(&cinfo, &lines[0], height);
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106 jpeg_finish_compress(&cinfo);
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107 jpeg_destroy_compress(&cinfo);
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108 }
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109
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110
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111 void JpegWriter::SetQuality(uint8_t quality)
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112 {
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113 if (quality == 0 || quality > 100)
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114 {
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115 throw OrthancException(ErrorCode_ParameterOutOfRange);
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116 }
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117
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118 quality_ = quality;
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119 }
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120
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121
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122 #if ORTHANC_SANDBOXED == 0
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123 void JpegWriter::WriteToFileInternal(const std::string& filename,
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124 unsigned int width,
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125 unsigned int height,
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126 unsigned int pitch,
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127 PixelFormat format,
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128 const void* buffer)
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129 {
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130 FILE* fp = SystemToolbox::OpenFile(filename, FileMode_WriteBinary);
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131 if (fp == NULL)
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132 {
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133 throw OrthancException(ErrorCode_CannotWriteFile);
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134 }
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135
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136 std::vector<uint8_t*> lines;
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137 GetLines(lines, height, pitch, format, buffer);
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138
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139 struct jpeg_compress_struct cinfo;
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140 memset(&cinfo, 0, sizeof(struct jpeg_compress_struct));
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141
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142 Internals::JpegErrorManager jerr;
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143 cinfo.err = jerr.GetPublic();
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144
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145 if (setjmp(jerr.GetJumpBuffer()))
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146 {
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147 /* If we get here, the JPEG code has signaled an error.
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148 * We need to clean up the JPEG object, close the input file, and return.
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149 */
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150 jpeg_destroy_compress(&cinfo);
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151 fclose(fp);
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152 throw OrthancException(ErrorCode_InternalError,
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153 "Error during JPEG encoding: " + jerr.GetMessage());
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154 }
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155
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156 // Do not allocate data on the stack below this line!
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157
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158 jpeg_create_compress(&cinfo);
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159 jpeg_stdio_dest(&cinfo, fp);
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160 Compress(cinfo, lines, width, height, format, quality_);
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161
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162 // Everything went fine, "setjmp()" didn't get called
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163
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164 fclose(fp);
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165 }
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166 #endif
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167
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168
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169 void JpegWriter::WriteToMemoryInternal(std::string& jpeg,
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170 unsigned int width,
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171 unsigned int height,
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172 unsigned int pitch,
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173 PixelFormat format,
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174 const void* buffer)
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175 {
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176 std::vector<uint8_t*> lines;
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177 GetLines(lines, height, pitch, format, buffer);
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178
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179 struct jpeg_compress_struct cinfo;
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180 memset(&cinfo, 0, sizeof(struct jpeg_compress_struct));
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181
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182 Internals::JpegErrorManager jerr;
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183
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184 unsigned char* data = NULL;
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185 unsigned long size;
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186
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187 if (setjmp(jerr.GetJumpBuffer()))
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188 {
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189 jpeg_destroy_compress(&cinfo);
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190
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191 if (data != NULL)
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192 {
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193 free(data);
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194 }
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195
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196 throw OrthancException(ErrorCode_InternalError,
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197 "Error during JPEG encoding: " + jerr.GetMessage());
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198 }
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199
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200 // Do not allocate data on the stack below this line!
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201
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202 jpeg_create_compress(&cinfo);
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203 cinfo.err = jerr.GetPublic();
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204 jpeg_mem_dest(&cinfo, &data, &size);
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205
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206 Compress(cinfo, lines, width, height, format, quality_);
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207
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208 // Everything went fine, "setjmp()" didn't get called
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209
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210 jpeg.assign(reinterpret_cast<const char*>(data), size);
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211 free(data);
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212 }
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213 }