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comparison: gfx/graphite2/src/FileFace.cpp
gfx/graphite2/src/FileFace.cpp
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| 1 /* GRAPHITE2 LICENSING | |
| 2 | |
| 3 Copyright 2012, SIL International | |
| 4 All rights reserved. | |
| 5 | |
| 6 This library is free software; you can redistribute it and/or modify | |
| 7 it under the terms of the GNU Lesser General Public License as published | |
| 8 by the Free Software Foundation; either version 2.1 of License, or | |
| 9 (at your option) any later version. | |
| 10 | |
| 11 This program is distributed in the hope that it will be useful, | |
| 12 but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 14 Lesser General Public License for more details. | |
| 15 | |
| 16 You should also have received a copy of the GNU Lesser General Public | |
| 17 License along with this library in the file named "LICENSE". | |
| 18 If not, write to the Free Software Foundation, 51 Franklin Street, | |
| 19 Suite 500, Boston, MA 02110-1335, USA or visit their web page on the | |
| 20 internet at http://www.fsf.org/licenses/lgpl.html. | |
| 21 | |
| 22 Alternatively, the contents of this file may be used under the terms of the | |
| 23 Mozilla Public License (http://mozilla.org/MPL) or the GNU General Public | |
| 24 License, as published by the Free Software Foundation, either version 2 | |
| 25 of the License or (at your option) any later version. | |
| 26 */ | |
| 27 #include <cstring> | |
| 28 #include "inc/FileFace.h" | |
| 29 | |
| 30 | |
| 31 #ifndef GRAPHITE2_NFILEFACE | |
| 32 | |
| 33 using namespace graphite2; | |
| 34 | |
| 35 FileFace::FileFace(const char *filename) | |
| 36 : _file(fopen(filename, "rb")), | |
| 37 _file_len(0), | |
| 38 _header_tbl(NULL), | |
| 39 _table_dir(NULL) | |
| 40 { | |
| 41 if (!_file) return; | |
| 42 | |
| 43 if (fseek(_file, 0, SEEK_END)) return; | |
| 44 _file_len = ftell(_file); | |
| 45 if (fseek(_file, 0, SEEK_SET)) return; | |
| 46 | |
| 47 size_t tbl_offset, tbl_len; | |
| 48 | |
| 49 // Get the header. | |
| 50 if (!TtfUtil::GetHeaderInfo(tbl_offset, tbl_len)) return; | |
| 51 if (fseek(_file, tbl_offset, SEEK_SET)) return; | |
| 52 _header_tbl = (TtfUtil::Sfnt::OffsetSubTable*)gralloc<char>(tbl_len); | |
| 53 if (_header_tbl) | |
| 54 { | |
| 55 if (fread(_header_tbl, 1, tbl_len, _file) != tbl_len) return; | |
| 56 if (!TtfUtil::CheckHeader(_header_tbl)) return; | |
| 57 } | |
| 58 | |
| 59 // Get the table directory | |
| 60 if (!TtfUtil::GetTableDirInfo(_header_tbl, tbl_offset, tbl_len)) return; | |
| 61 _table_dir = (TtfUtil::Sfnt::OffsetSubTable::Entry*)gralloc<char>(tbl_len); | |
| 62 if (fseek(_file, tbl_offset, SEEK_SET)) return; | |
| 63 if (_table_dir) | |
| 64 if (fread(_table_dir, 1, tbl_len, _file) != tbl_len) return; | |
| 65 } | |
| 66 | |
| 67 FileFace::~FileFace() | |
| 68 { | |
| 69 free(_table_dir); | |
| 70 free(_header_tbl); | |
| 71 if (_file) | |
| 72 fclose(_file); | |
| 73 } | |
| 74 | |
| 75 | |
| 76 const void *FileFace::get_table_fn(const void* appFaceHandle, unsigned int name, size_t *len) | |
| 77 { | |
| 78 if (appFaceHandle == 0) return 0; | |
| 79 const FileFace & file_face = *static_cast<const FileFace *>(appFaceHandle); | |
| 80 | |
| 81 void *tbl; | |
| 82 size_t tbl_offset, tbl_len; | |
| 83 if (!TtfUtil::GetTableInfo(name, file_face._header_tbl, file_face._table_dir, tbl_offset, tbl_len)) | |
| 84 return 0; | |
| 85 | |
| 86 if (tbl_offset + tbl_len > file_face._file_len | |
| 87 || fseek(file_face._file, tbl_offset, SEEK_SET) != 0) | |
| 88 return 0; | |
| 89 | |
| 90 tbl = malloc(tbl_len); | |
| 91 if (fread(tbl, 1, tbl_len, file_face._file) != tbl_len) | |
| 92 { | |
| 93 free(tbl); | |
| 94 return 0; | |
| 95 } | |
| 96 | |
| 97 if (len) *len = tbl_len; | |
| 98 return tbl; | |
| 99 } | |
| 100 | |
| 101 void FileFace::rel_table_fn(const void* appFaceHandle, const void *table_buffer) | |
| 102 { | |
| 103 if (appFaceHandle == 0) return; | |
| 104 | |
| 105 free(const_cast<void *>(table_buffer)); | |
| 106 } | |
| 107 | |
| 108 const gr_face_ops FileFace::ops = { sizeof FileFace::ops, &FileFace::get_table_fn, &FileFace::rel_table_fn }; | |
| 109 | |
| 110 | |
| 111 #endif //!GRAPHITE2_NFILEFACE |
