annotate OrthancFramework/Sources/Images/JpegWriter.cpp @ 5161:b6dc4606ab04

release notes for 1.11.3
author Alain Mazy <am@osimis.io>
date Fri, 03 Feb 2023 14:24:43 +0100
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1 /**
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2 * Orthanc - A Lightweight, RESTful DICOM Store
1900
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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) 2017-2022 Osimis S.A., Belgium
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6 * Copyright (C) 2021-2022 Sebastien Jodogne, ICTEAM UCLouvain, Belgium
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7 *
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8 * This program is free software: you can redistribute it and/or
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9 * modify it under the terms of the GNU Lesser General Public License
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10 * as published by the Free Software Foundation, either version 3 of
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11 * the License, or (at your option) any later version.
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12 *
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13 * This program is distributed in the hope that it will be useful, but
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14 * WITHOUT ANY WARRANTY; without even the implied warranty of
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15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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16 * Lesser General Public License for more details.
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17 *
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18 * You should have received a copy of the GNU Lesser General Public
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19 * License along with this program. If not, see
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20 * <http://www.gnu.org/licenses/>.
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21 **/
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24 #include "../PrecompiledHeaders.h"
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25 #include "JpegWriter.h"
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27 #include "../OrthancException.h"
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28 #include "../Logging.h"
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29 #include "JpegErrorManager.h"
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30
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31 #if ORTHANC_SANDBOXED == 0
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32 # include "../SystemToolbox.h"
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33 #endif
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34
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35 #include <stdlib.h>
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36 #include <vector>
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37
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38 namespace Orthanc
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39 {
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40 static void GetLines(std::vector<uint8_t*>& lines,
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41 unsigned int height,
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42 unsigned int pitch,
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43 PixelFormat format,
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44 const void* buffer)
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45 {
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46 if (format != PixelFormat_Grayscale8 &&
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47 format != PixelFormat_RGB24)
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48 {
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49 throw OrthancException(ErrorCode_ParameterOutOfRange);
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50 }
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51
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52 lines.resize(height);
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53
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54 uint8_t* base = const_cast<uint8_t*>(reinterpret_cast<const uint8_t*>(buffer));
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55 for (unsigned int y = 0; y < height; y++)
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56 {
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57 lines[y] = base + static_cast<intptr_t>(y) * static_cast<intptr_t>(pitch);
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58 }
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59 }
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60
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61
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62 static void Compress(struct jpeg_compress_struct& cinfo,
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63 std::vector<uint8_t*>& lines,
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64 unsigned int width,
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65 unsigned int height,
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66 PixelFormat format,
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67 uint8_t quality)
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68 {
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69 cinfo.image_width = width;
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70 cinfo.image_height = height;
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71
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72 switch (format)
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73 {
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74 case PixelFormat_Grayscale8:
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75 cinfo.input_components = 1;
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76 cinfo.in_color_space = JCS_GRAYSCALE;
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77 break;
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78
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79 case PixelFormat_RGB24:
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80 cinfo.input_components = 3;
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81 cinfo.in_color_space = JCS_RGB;
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82 break;
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83
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84 default:
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85 throw OrthancException(ErrorCode_InternalError);
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86 }
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87
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88 jpeg_set_defaults(&cinfo);
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89
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90 // The "static_cast" is necessary on OS X:
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91 // https://github.com/simonfuhrmann/mve/issues/371
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92 jpeg_set_quality(&cinfo, quality, static_cast<boolean>(true));
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93 jpeg_start_compress(&cinfo, static_cast<boolean>(true));
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94
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95 jpeg_write_scanlines(&cinfo, &lines[0], height);
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96 jpeg_finish_compress(&cinfo);
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97 jpeg_destroy_compress(&cinfo);
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98 }
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99
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100
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101 JpegWriter::JpegWriter() : quality_(90)
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102 {
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103 }
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104
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105
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106 void JpegWriter::SetQuality(uint8_t quality)
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107 {
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108 if (quality == 0 || quality > 100)
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109 {
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110 throw OrthancException(ErrorCode_ParameterOutOfRange);
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111 }
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112
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113 quality_ = quality;
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114 }
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115
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116
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117 #if ORTHANC_SANDBOXED == 0
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118 void JpegWriter::WriteToFileInternal(const std::string& filename,
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119 unsigned int width,
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120 unsigned int height,
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121 unsigned int pitch,
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122 PixelFormat format,
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123 const void* buffer)
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124 {
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125 FILE* fp = SystemToolbox::OpenFile(filename, FileMode_WriteBinary);
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126 if (fp == NULL)
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127 {
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128 throw OrthancException(ErrorCode_CannotWriteFile);
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129 }
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130
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131 std::vector<uint8_t*> lines;
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132 GetLines(lines, height, pitch, format, buffer);
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133
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134 struct jpeg_compress_struct cinfo;
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135 memset(&cinfo, 0, sizeof(struct jpeg_compress_struct));
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136
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137 Internals::JpegErrorManager jerr;
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138 cinfo.err = jerr.GetPublic();
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139
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140 if (setjmp(jerr.GetJumpBuffer()))
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141 {
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142 /* If we get here, the JPEG code has signaled an error.
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143 * We need to clean up the JPEG object, close the input file, and return.
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144 */
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145 jpeg_destroy_compress(&cinfo);
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146 fclose(fp);
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147 throw OrthancException(ErrorCode_InternalError,
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148 "Error during JPEG encoding: " + jerr.GetMessage());
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149 }
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150
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151 // Do not allocate data on the stack below this line!
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152
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153 jpeg_create_compress(&cinfo);
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154 jpeg_stdio_dest(&cinfo, fp);
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155 Compress(cinfo, lines, width, height, format, quality_);
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156
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157 // Everything went fine, "setjmp()" didn't get called
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158
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159 fclose(fp);
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160 }
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161 #endif
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162
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163
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164 void JpegWriter::WriteToMemoryInternal(std::string& jpeg,
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165 unsigned int width,
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166 unsigned int height,
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167 unsigned int pitch,
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168 PixelFormat format,
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169 const void* buffer)
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170 {
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171 std::vector<uint8_t*> lines;
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172 GetLines(lines, height, pitch, format, buffer);
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173
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174 struct jpeg_compress_struct cinfo;
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175 memset(&cinfo, 0, sizeof(struct jpeg_compress_struct));
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176
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177 Internals::JpegErrorManager jerr;
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178
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179 unsigned char* data = NULL;
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180 unsigned long size;
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181
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182 if (setjmp(jerr.GetJumpBuffer()))
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183 {
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184 jpeg_destroy_compress(&cinfo);
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185
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186 if (data != NULL)
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187 {
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188 free(data);
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189 }
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190
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191 throw OrthancException(ErrorCode_InternalError,
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192 "Error during JPEG encoding: " + jerr.GetMessage());
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193 }
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194
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195 // Do not allocate data on the stack below this line!
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196
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197 jpeg_create_compress(&cinfo);
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198 cinfo.err = jerr.GetPublic();
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199 jpeg_mem_dest(&cinfo, &data, &size);
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200
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201 Compress(cinfo, lines, width, height, format, quality_);
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202
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203 // Everything went fine, "setjmp()" didn't get called
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204
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205 jpeg.assign(reinterpret_cast<const char*>(data), size);
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206 free(data);
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207 }
4300
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208
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209 uint8_t JpegWriter::GetQuality() const
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210 {
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211 return quality_;
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212 }
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213 }