Mercurial > hg > orthanc
annotate Core/ImageFormats/JpegReader.cpp @ 1610:2dff2bdffdb8
font support within Orthanc
| author | Sebastien Jodogne <s.jodogne@gmail.com> |
|---|---|
| date | Fri, 04 Sep 2015 13:44:21 +0200 |
| parents | fd0464ce1962 |
| children |
| rev | line source |
|---|---|
| 1604 | 1 /** |
| 2 * Orthanc - A Lightweight, RESTful DICOM Store | |
| 3 * Copyright (C) 2012-2015 Sebastien Jodogne, Medical Physics | |
| 4 * Department, University Hospital of Liege, Belgium | |
| 5 * | |
| 6 * This program is free software: you can redistribute it and/or | |
| 7 * modify it under the terms of the GNU General Public License as | |
| 8 * published by the Free Software Foundation, either version 3 of the | |
| 9 * License, or (at your option) any later version. | |
| 10 * | |
| 11 * In addition, as a special exception, the copyright holders of this | |
| 12 * program give permission to link the code of its release with the | |
| 13 * OpenSSL project's "OpenSSL" library (or with modified versions of it | |
| 14 * that use the same license as the "OpenSSL" library), and distribute | |
| 15 * the linked executables. You must obey the GNU General Public License | |
| 16 * in all respects for all of the code used other than "OpenSSL". If you | |
| 17 * modify file(s) with this exception, you may extend this exception to | |
| 18 * your version of the file(s), but you are not obligated to do so. If | |
| 19 * you do not wish to do so, delete this exception statement from your | |
| 20 * version. If you delete this exception statement from all source files | |
| 21 * in the program, then also delete it here. | |
| 22 * | |
| 23 * This program is distributed in the hope that it will be useful, but | |
| 24 * WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 25 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 26 * General Public License for more details. | |
| 27 * | |
| 28 * You should have received a copy of the GNU General Public License | |
| 29 * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
| 30 **/ | |
| 31 | |
| 32 | |
| 33 #include "../PrecompiledHeaders.h" | |
| 34 #include "JpegReader.h" | |
| 35 | |
| 36 #include "JpegErrorManager.h" | |
| 37 #include "../OrthancException.h" | |
| 38 #include "../Logging.h" | |
| 39 | |
| 40 namespace Orthanc | |
| 41 { | |
| 42 static void Uncompress(struct jpeg_decompress_struct& cinfo, | |
| 43 std::string& content, | |
| 44 ImageAccessor& accessor) | |
| 45 { | |
| 46 jpeg_read_header(&cinfo, TRUE); | |
| 47 jpeg_start_decompress(&cinfo); | |
| 48 | |
| 49 PixelFormat format; | |
| 50 if (cinfo.output_components == 1 && | |
| 51 cinfo.out_color_space == JCS_GRAYSCALE) | |
| 52 { | |
| 53 format = PixelFormat_Grayscale8; | |
| 54 } | |
| 55 else if (cinfo.output_components == 3 && | |
| 56 cinfo.out_color_space == JCS_RGB) | |
| 57 { | |
| 58 format = PixelFormat_RGB24; | |
| 59 } | |
| 60 else | |
| 61 { | |
| 62 throw OrthancException(ErrorCode_NotImplemented); | |
| 63 } | |
| 64 | |
| 65 unsigned int pitch = cinfo.output_width * cinfo.output_components; | |
| 66 | |
| 67 /* Make a one-row-high sample array that will go away when done with image */ | |
| 68 JSAMPARRAY buffer = (*cinfo.mem->alloc_sarray) ((j_common_ptr) &cinfo, JPOOL_IMAGE, pitch, 1); | |
| 69 | |
| 70 try | |
| 71 { | |
| 72 content.resize(pitch * cinfo.output_height); | |
| 73 } | |
| 74 catch (...) | |
| 75 { | |
| 76 throw OrthancException(ErrorCode_NotEnoughMemory); | |
| 77 } | |
| 78 | |
|
1610
2dff2bdffdb8
font support within Orthanc
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
1605
diff
changeset
|
79 accessor.AssignWritable(format, cinfo.output_width, cinfo.output_height, pitch, |
|
2dff2bdffdb8
font support within Orthanc
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
1605
diff
changeset
|
80 content.empty() ? NULL : &content[0]); |
| 1604 | 81 |
| 82 uint8_t* target = reinterpret_cast<uint8_t*>(&content[0]); | |
| 83 while (cinfo.output_scanline < cinfo.output_height) | |
| 84 { | |
| 85 jpeg_read_scanlines(&cinfo, buffer, 1); | |
| 86 memcpy(target, buffer[0], pitch); | |
| 87 target += pitch; | |
| 88 } | |
| 89 | |
| 90 // Everything went fine, "setjmp()" didn't get called | |
| 91 | |
| 92 jpeg_finish_decompress(&cinfo); | |
| 93 } | |
| 94 | |
| 95 | |
| 96 void JpegReader::ReadFromFile(const char* filename) | |
| 97 { | |
| 98 FILE* fp = fopen(filename, "rb"); | |
| 99 if (!fp) | |
| 100 { | |
| 101 throw OrthancException(ErrorCode_InexistentFile); | |
| 102 } | |
| 103 | |
| 104 struct jpeg_decompress_struct cinfo; | |
| 105 memset(&cinfo, 0, sizeof(struct jpeg_decompress_struct)); | |
| 106 | |
| 107 Internals::JpegErrorManager jerr; | |
| 108 cinfo.err = jerr.GetPublic(); | |
| 109 | |
| 110 if (setjmp(jerr.GetJumpBuffer())) | |
| 111 { | |
| 112 jpeg_destroy_decompress(&cinfo); | |
| 113 fclose(fp); | |
| 114 LOG(ERROR) << "Error during JPEG encoding: " << jerr.GetMessage(); | |
| 115 throw OrthancException(ErrorCode_InternalError); | |
| 116 } | |
| 117 | |
| 118 // Below this line, we are under the scope of a "setjmp" | |
| 119 | |
| 120 jpeg_create_decompress(&cinfo); | |
| 121 jpeg_stdio_src(&cinfo, fp); | |
| 122 | |
| 123 try | |
| 124 { | |
| 125 Uncompress(cinfo, content_, *this); | |
| 126 } | |
| 127 catch (OrthancException&) | |
| 128 { | |
| 129 jpeg_destroy_decompress(&cinfo); | |
| 130 fclose(fp); | |
| 131 throw; | |
| 132 } | |
| 133 | |
| 134 jpeg_destroy_decompress(&cinfo); | |
| 135 fclose(fp); | |
| 136 } | |
| 137 | |
| 138 | |
| 139 void JpegReader::ReadFromMemory(const void* buffer, | |
| 140 size_t size) | |
| 141 { | |
| 142 struct jpeg_decompress_struct cinfo; | |
| 143 memset(&cinfo, 0, sizeof(struct jpeg_decompress_struct)); | |
| 144 | |
| 145 Internals::JpegErrorManager jerr; | |
| 146 cinfo.err = jerr.GetPublic(); | |
| 147 | |
| 148 if (setjmp(jerr.GetJumpBuffer())) | |
| 149 { | |
| 150 jpeg_destroy_decompress(&cinfo); | |
| 151 LOG(ERROR) << "Error during JPEG encoding: " << jerr.GetMessage(); | |
| 152 throw OrthancException(ErrorCode_InternalError); | |
| 153 } | |
| 154 | |
| 155 // Below this line, we are under the scope of a "setjmp" | |
| 156 jpeg_create_decompress(&cinfo); | |
| 157 jpeg_mem_src(&cinfo, const_cast<unsigned char*>(reinterpret_cast<const unsigned char*>(buffer)), size); | |
| 158 | |
| 159 try | |
| 160 { | |
| 161 Uncompress(cinfo, content_, *this); | |
| 162 } | |
| 163 catch (OrthancException&) | |
| 164 { | |
| 165 jpeg_destroy_decompress(&cinfo); | |
| 166 throw; | |
| 167 } | |
| 168 | |
| 169 jpeg_destroy_decompress(&cinfo); | |
| 170 } | |
| 171 | |
| 172 | |
| 173 void JpegReader::ReadFromMemory(const std::string& buffer) | |
| 174 { | |
| 175 if (buffer.empty()) | |
| 176 { | |
| 177 ReadFromMemory(NULL, 0); | |
| 178 } | |
| 179 else | |
| 180 { | |
| 181 ReadFromMemory(buffer.c_str(), buffer.size()); | |
| 182 } | |
| 183 } | |
| 184 } |