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1602
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1 /**
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2 * Orthanc - A Lightweight, RESTful DICOM Store
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3 * Copyright (C) 2012-2015 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 General Public License as
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8 * published by the Free Software Foundation, either version 3 of the
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9 * License, or (at your option) any later version.
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10 *
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11 * In addition, as a special exception, the copyright holders of this
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12 * program give permission to link the code of its release with the
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13 * OpenSSL project's "OpenSSL" library (or with modified versions of it
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14 * that use the same license as the "OpenSSL" library), and distribute
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15 * the linked executables. You must obey the GNU General Public License
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16 * in all respects for all of the code used other than "OpenSSL". If you
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17 * modify file(s) with this exception, you may extend this exception to
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18 * your version of the file(s), but you are not obligated to do so. If
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19 * you do not wish to do so, delete this exception statement from your
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20 * version. If you delete this exception statement from all source files
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21 * in the program, then also delete it here.
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22 *
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23 * This program is distributed in the hope that it will be useful, but
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24 * WITHOUT ANY WARRANTY; without even the implied warranty of
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25 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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26 * General Public License for more details.
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27 *
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28 * You should have received a copy of the GNU General Public License
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29 * along with this program. If not, see <http://www.gnu.org/licenses/>.
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30 **/
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31
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32
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1604
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33 #include "../PrecompiledHeaders.h"
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1602
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34 #include "JpegWriter.h"
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35
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36 #include "../OrthancException.h"
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37 #include "../Logging.h"
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38
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1604
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39 #include "JpegErrorManager.h"
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40
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1602
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41 #include <vector>
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42
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43 namespace Orthanc
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44 {
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45 static void GetLines(std::vector<uint8_t*>& lines,
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46 unsigned int height,
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47 unsigned int pitch,
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48 PixelFormat format,
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49 const void* buffer)
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50 {
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51 if (format != PixelFormat_Grayscale8 &&
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52 format != PixelFormat_RGB24)
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53 {
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54 throw OrthancException(ErrorCode_ParameterOutOfRange);
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55 }
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56
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57 lines.resize(height);
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58
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59 uint8_t* base = const_cast<uint8_t*>(reinterpret_cast<const uint8_t*>(buffer));
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60 for (unsigned int y = 0; y < height; y++)
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61 {
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62 lines[y] = base + static_cast<intptr_t>(y) * static_cast<intptr_t>(pitch);
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63 }
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64 }
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65
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66
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67 static void Compress(struct jpeg_compress_struct& cinfo,
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68 std::vector<uint8_t*>& lines,
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69 unsigned int width,
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70 unsigned int height,
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71 PixelFormat format,
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72 int quality)
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73 {
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74 cinfo.image_width = width;
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75 cinfo.image_height = height;
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76
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77 switch (format)
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78 {
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79 case PixelFormat_Grayscale8:
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80 cinfo.input_components = 1;
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81 cinfo.in_color_space = JCS_GRAYSCALE;
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82 break;
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83
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84 case PixelFormat_RGB24:
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85 cinfo.input_components = 3;
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86 cinfo.in_color_space = JCS_RGB;
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87 break;
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88
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89 default:
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90 throw OrthancException(ErrorCode_InternalError);
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91 }
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92
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93 jpeg_set_defaults(&cinfo);
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94 jpeg_set_quality(&cinfo, quality, TRUE);
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95 jpeg_start_compress(&cinfo, TRUE);
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96 jpeg_write_scanlines(&cinfo, &lines[0], height);
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97 jpeg_finish_compress(&cinfo);
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98 jpeg_destroy_compress(&cinfo);
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99 }
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100
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101
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102 void JpegWriter::SetQuality(uint8_t quality)
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103 {
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104 if (quality <= 0 || quality > 100)
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105 {
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106 throw OrthancException(ErrorCode_ParameterOutOfRange);
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107 }
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108
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109 quality_ = quality;
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110 }
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111
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112
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113 void JpegWriter::WriteToFile(const char* filename,
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114 unsigned int width,
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115 unsigned int height,
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116 unsigned int pitch,
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117 PixelFormat format,
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118 const void* buffer)
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119 {
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120 FILE* fp = fopen(filename, "wb");
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121 if (fp == NULL)
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122 {
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123 throw OrthancException(ErrorCode_FullStorage);
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124 }
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125
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126 std::vector<uint8_t*> lines;
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127 GetLines(lines, height, pitch, format, buffer);
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128
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129 struct jpeg_compress_struct cinfo;
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130 memset(&cinfo, 0, sizeof(struct jpeg_compress_struct));
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131
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1604
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132 Internals::JpegErrorManager jerr;
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1602
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133 cinfo.err = jerr.GetPublic();
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134
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135 if (setjmp(jerr.GetJumpBuffer()))
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136 {
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137 /* If we get here, the JPEG code has signaled an error.
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138 * We need to clean up the JPEG object, close the input file, and return.
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139 */
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140 jpeg_destroy_compress(&cinfo);
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141 fclose(fp);
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142 LOG(ERROR) << "Error during JPEG encoding: " << jerr.GetMessage();
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143 throw OrthancException(ErrorCode_InternalError);
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144 }
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145
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146 // Do not allocate data on the stack below this line!
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147
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148 jpeg_create_compress(&cinfo);
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149 jpeg_stdio_dest(&cinfo, fp);
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150 Compress(cinfo, lines, width, height, format, quality_);
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151
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152 // Everything went fine, "setjmp()" didn't get called
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153
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154 fclose(fp);
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155 }
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156
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157
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158 void JpegWriter::WriteToMemory(std::string& jpeg,
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159 unsigned int width,
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160 unsigned int height,
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161 unsigned int pitch,
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162 PixelFormat format,
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163 const void* buffer)
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164 {
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165 std::vector<uint8_t*> lines;
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166 GetLines(lines, height, pitch, format, buffer);
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167
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168 struct jpeg_compress_struct cinfo;
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169 memset(&cinfo, 0, sizeof(struct jpeg_compress_struct));
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170
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1604
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171 Internals::JpegErrorManager jerr;
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1602
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172
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173 unsigned char* data = NULL;
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174 unsigned long size;
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175
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176 if (setjmp(jerr.GetJumpBuffer()))
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177 {
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178 jpeg_destroy_compress(&cinfo);
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179
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180 if (data != NULL)
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181 {
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182 free(data);
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183 }
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184
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185 LOG(ERROR) << "Error during JPEG encoding: " << jerr.GetMessage();
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186 throw OrthancException(ErrorCode_InternalError);
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187 }
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188
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189 // Do not allocate data on the stack below this line!
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190
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191 jpeg_create_compress(&cinfo);
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192 cinfo.err = jerr.GetPublic();
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193 jpeg_mem_dest(&cinfo, &data, &size);
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194
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195 Compress(cinfo, lines, width, height, format, quality_);
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196
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197 // Everything went fine, "setjmp()" didn't get called
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198
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199 jpeg.assign(reinterpret_cast<const char*>(data), size);
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200 free(data);
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201 }
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202 }
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