annotate OrthancFramework/Sources/Images/JpegWriter.cpp @ 4731:283d246fafdb

fix broken "Do lookup" button in Orthanc Explorer
author Sebastien Jodogne <s.jodogne@gmail.com>
date Sun, 27 Jun 2021 12:48:26 +0200
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children 7053502fbf97
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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) 2017-2021 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 Lesser General Public License
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9 * as published by the Free Software Foundation, either version 3 of
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10 * the License, or (at your option) any later version.
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11 *
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12 * This program is distributed in the hope that it will be useful, but
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13 * WITHOUT ANY WARRANTY; without even the implied warranty of
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14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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15 * Lesser General Public License for more details.
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16 *
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17 * You should have received a copy of the GNU Lesser General Public
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18 * License along with this program. If not, see
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19 * <http://www.gnu.org/licenses/>.
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20 **/
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23 #include "../PrecompiledHeaders.h"
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24 #include "JpegWriter.h"
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26 #include "../OrthancException.h"
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27 #include "../Logging.h"
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28 #include "JpegErrorManager.h"
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29
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30 #if ORTHANC_SANDBOXED == 0
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31 # include "../SystemToolbox.h"
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32 #endif
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33
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34 #include <stdlib.h>
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35 #include <vector>
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36
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37 namespace Orthanc
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38 {
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39 static void GetLines(std::vector<uint8_t*>& lines,
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40 unsigned int height,
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41 unsigned int pitch,
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42 PixelFormat format,
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43 const void* buffer)
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44 {
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45 if (format != PixelFormat_Grayscale8 &&
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46 format != PixelFormat_RGB24)
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47 {
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48 throw OrthancException(ErrorCode_ParameterOutOfRange);
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49 }
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50
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51 lines.resize(height);
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52
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53 uint8_t* base = const_cast<uint8_t*>(reinterpret_cast<const uint8_t*>(buffer));
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54 for (unsigned int y = 0; y < height; y++)
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55 {
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56 lines[y] = base + static_cast<intptr_t>(y) * static_cast<intptr_t>(pitch);
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57 }
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58 }
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59
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60
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61 static void Compress(struct jpeg_compress_struct& cinfo,
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62 std::vector<uint8_t*>& lines,
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63 unsigned int width,
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64 unsigned int height,
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65 PixelFormat format,
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66 uint8_t quality)
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67 {
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68 cinfo.image_width = width;
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69 cinfo.image_height = height;
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70
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71 switch (format)
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72 {
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73 case PixelFormat_Grayscale8:
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74 cinfo.input_components = 1;
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75 cinfo.in_color_space = JCS_GRAYSCALE;
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76 break;
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77
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78 case PixelFormat_RGB24:
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79 cinfo.input_components = 3;
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80 cinfo.in_color_space = JCS_RGB;
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81 break;
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82
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83 default:
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84 throw OrthancException(ErrorCode_InternalError);
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85 }
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86
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87 jpeg_set_defaults(&cinfo);
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88
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89 // The "static_cast" is necessary on OS X:
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90 // https://github.com/simonfuhrmann/mve/issues/371
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91 jpeg_set_quality(&cinfo, quality, static_cast<boolean>(true));
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92 jpeg_start_compress(&cinfo, static_cast<boolean>(true));
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93
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94 jpeg_write_scanlines(&cinfo, &lines[0], height);
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95 jpeg_finish_compress(&cinfo);
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96 jpeg_destroy_compress(&cinfo);
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97 }
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98
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99
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100 JpegWriter::JpegWriter() : quality_(90)
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101 {
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102 }
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103
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104
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105 void JpegWriter::SetQuality(uint8_t quality)
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106 {
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107 if (quality == 0 || quality > 100)
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108 {
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109 throw OrthancException(ErrorCode_ParameterOutOfRange);
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110 }
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111
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112 quality_ = quality;
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113 }
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114
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115
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116 #if ORTHANC_SANDBOXED == 0
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117 void JpegWriter::WriteToFileInternal(const std::string& filename,
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118 unsigned int width,
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119 unsigned int height,
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120 unsigned int pitch,
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121 PixelFormat format,
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122 const void* buffer)
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123 {
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124 FILE* fp = SystemToolbox::OpenFile(filename, FileMode_WriteBinary);
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125 if (fp == NULL)
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126 {
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127 throw OrthancException(ErrorCode_CannotWriteFile);
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128 }
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129
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130 std::vector<uint8_t*> lines;
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131 GetLines(lines, height, pitch, format, buffer);
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132
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133 struct jpeg_compress_struct cinfo;
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134 memset(&cinfo, 0, sizeof(struct jpeg_compress_struct));
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135
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136 Internals::JpegErrorManager jerr;
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137 cinfo.err = jerr.GetPublic();
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138
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139 if (setjmp(jerr.GetJumpBuffer()))
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140 {
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141 /* If we get here, the JPEG code has signaled an error.
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142 * We need to clean up the JPEG object, close the input file, and return.
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143 */
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144 jpeg_destroy_compress(&cinfo);
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145 fclose(fp);
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146 throw OrthancException(ErrorCode_InternalError,
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147 "Error during JPEG encoding: " + jerr.GetMessage());
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148 }
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149
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150 // Do not allocate data on the stack below this line!
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151
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152 jpeg_create_compress(&cinfo);
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153 jpeg_stdio_dest(&cinfo, fp);
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154 Compress(cinfo, lines, width, height, format, quality_);
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155
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156 // Everything went fine, "setjmp()" didn't get called
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157
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158 fclose(fp);
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159 }
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160 #endif
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161
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162
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163 void JpegWriter::WriteToMemoryInternal(std::string& jpeg,
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164 unsigned int width,
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165 unsigned int height,
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166 unsigned int pitch,
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167 PixelFormat format,
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168 const void* buffer)
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169 {
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170 std::vector<uint8_t*> lines;
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171 GetLines(lines, height, pitch, format, buffer);
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172
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173 struct jpeg_compress_struct cinfo;
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174 memset(&cinfo, 0, sizeof(struct jpeg_compress_struct));
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175
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176 Internals::JpegErrorManager jerr;
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177
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178 unsigned char* data = NULL;
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179 unsigned long size;
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180
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181 if (setjmp(jerr.GetJumpBuffer()))
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182 {
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183 jpeg_destroy_compress(&cinfo);
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184
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185 if (data != NULL)
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186 {
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187 free(data);
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188 }
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189
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190 throw OrthancException(ErrorCode_InternalError,
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191 "Error during JPEG encoding: " + jerr.GetMessage());
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192 }
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193
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194 // Do not allocate data on the stack below this line!
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195
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196 jpeg_create_compress(&cinfo);
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197 cinfo.err = jerr.GetPublic();
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198 jpeg_mem_dest(&cinfo, &data, &size);
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199
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200 Compress(cinfo, lines, width, height, format, quality_);
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201
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202 // Everything went fine, "setjmp()" didn't get called
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203
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204 jpeg.assign(reinterpret_cast<const char*>(data), size);
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205 free(data);
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206 }
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207
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208 uint8_t JpegWriter::GetQuality() const
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209 {
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210 return quality_;
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211 }
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212 }