gfx/graphite2/src/FileFace.cpp@b8a032363ba2 (annotated)
gfx/graphite2/src/FileFace.cpp
Thu, 22 Jan 2015 13:21:57 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Thu, 22 Jan 2015 13:21:57 +0100
- branch
- TOR_BUG_9701
- changeset 15
- b8a032363ba2
- permissions
- -rw-r--r--
Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6
| michael@0 | 1 | /* GRAPHITE2 LICENSING |
| michael@0 | 2 | |
| michael@0 | 3 | Copyright 2012, SIL International |
| michael@0 | 4 | All rights reserved. |
| michael@0 | 5 | |
| michael@0 | 6 | This library is free software; you can redistribute it and/or modify |
| michael@0 | 7 | it under the terms of the GNU Lesser General Public License as published |
| michael@0 | 8 | by the Free Software Foundation; either version 2.1 of License, or |
| michael@0 | 9 | (at your option) any later version. |
| michael@0 | 10 | |
| michael@0 | 11 | This program is distributed in the hope that it will be useful, |
| michael@0 | 12 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| michael@0 | 13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| michael@0 | 14 | Lesser General Public License for more details. |
| michael@0 | 15 | |
| michael@0 | 16 | You should also have received a copy of the GNU Lesser General Public |
| michael@0 | 17 | License along with this library in the file named "LICENSE". |
| michael@0 | 18 | If not, write to the Free Software Foundation, 51 Franklin Street, |
| michael@0 | 19 | Suite 500, Boston, MA 02110-1335, USA or visit their web page on the |
| michael@0 | 20 | internet at http://www.fsf.org/licenses/lgpl.html. |
| michael@0 | 21 | |
| michael@0 | 22 | Alternatively, the contents of this file may be used under the terms of the |
| michael@0 | 23 | Mozilla Public License (http://mozilla.org/MPL) or the GNU General Public |
| michael@0 | 24 | License, as published by the Free Software Foundation, either version 2 |
| michael@0 | 25 | of the License or (at your option) any later version. |
| michael@0 | 26 | */ |
| michael@0 | 27 | #include <cstring> |
| michael@0 | 28 | #include "inc/FileFace.h" |
| michael@0 | 29 | |
| michael@0 | 30 | |
| michael@0 | 31 | #ifndef GRAPHITE2_NFILEFACE |
| michael@0 | 32 | |
| michael@0 | 33 | using namespace graphite2; |
| michael@0 | 34 | |
| michael@0 | 35 | FileFace::FileFace(const char *filename) |
| michael@0 | 36 | : _file(fopen(filename, "rb")), |
| michael@0 | 37 | _file_len(0), |
| michael@0 | 38 | _header_tbl(NULL), |
| michael@0 | 39 | _table_dir(NULL) |
| michael@0 | 40 | { |
| michael@0 | 41 | if (!_file) return; |
| michael@0 | 42 | |
| michael@0 | 43 | if (fseek(_file, 0, SEEK_END)) return; |
| michael@0 | 44 | _file_len = ftell(_file); |
| michael@0 | 45 | if (fseek(_file, 0, SEEK_SET)) return; |
| michael@0 | 46 | |
| michael@0 | 47 | size_t tbl_offset, tbl_len; |
| michael@0 | 48 | |
| michael@0 | 49 | // Get the header. |
| michael@0 | 50 | if (!TtfUtil::GetHeaderInfo(tbl_offset, tbl_len)) return; |
| michael@0 | 51 | if (fseek(_file, tbl_offset, SEEK_SET)) return; |
| michael@0 | 52 | _header_tbl = (TtfUtil::Sfnt::OffsetSubTable*)gralloc<char>(tbl_len); |
| michael@0 | 53 | if (_header_tbl) |
| michael@0 | 54 | { |
| michael@0 | 55 | if (fread(_header_tbl, 1, tbl_len, _file) != tbl_len) return; |
| michael@0 | 56 | if (!TtfUtil::CheckHeader(_header_tbl)) return; |
| michael@0 | 57 | } |
| michael@0 | 58 | |
| michael@0 | 59 | // Get the table directory |
| michael@0 | 60 | if (!TtfUtil::GetTableDirInfo(_header_tbl, tbl_offset, tbl_len)) return; |
| michael@0 | 61 | _table_dir = (TtfUtil::Sfnt::OffsetSubTable::Entry*)gralloc<char>(tbl_len); |
| michael@0 | 62 | if (fseek(_file, tbl_offset, SEEK_SET)) return; |
| michael@0 | 63 | if (_table_dir) |
| michael@0 | 64 | if (fread(_table_dir, 1, tbl_len, _file) != tbl_len) return; |
| michael@0 | 65 | } |
| michael@0 | 66 | |
| michael@0 | 67 | FileFace::~FileFace() |
| michael@0 | 68 | { |
| michael@0 | 69 | free(_table_dir); |
| michael@0 | 70 | free(_header_tbl); |
| michael@0 | 71 | if (_file) |
| michael@0 | 72 | fclose(_file); |
| michael@0 | 73 | } |
| michael@0 | 74 | |
| michael@0 | 75 | |
| michael@0 | 76 | const void *FileFace::get_table_fn(const void* appFaceHandle, unsigned int name, size_t *len) |
| michael@0 | 77 | { |
| michael@0 | 78 | if (appFaceHandle == 0) return 0; |
| michael@0 | 79 | const FileFace & file_face = *static_cast<const FileFace *>(appFaceHandle); |
| michael@0 | 80 | |
| michael@0 | 81 | void *tbl; |
| michael@0 | 82 | size_t tbl_offset, tbl_len; |
| michael@0 | 83 | if (!TtfUtil::GetTableInfo(name, file_face._header_tbl, file_face._table_dir, tbl_offset, tbl_len)) |
| michael@0 | 84 | return 0; |
| michael@0 | 85 | |
| michael@0 | 86 | if (tbl_offset + tbl_len > file_face._file_len |
| michael@0 | 87 | || fseek(file_face._file, tbl_offset, SEEK_SET) != 0) |
| michael@0 | 88 | return 0; |
| michael@0 | 89 | |
| michael@0 | 90 | tbl = malloc(tbl_len); |
| michael@0 | 91 | if (fread(tbl, 1, tbl_len, file_face._file) != tbl_len) |
| michael@0 | 92 | { |
| michael@0 | 93 | free(tbl); |
| michael@0 | 94 | return 0; |
| michael@0 | 95 | } |
| michael@0 | 96 | |
| michael@0 | 97 | if (len) *len = tbl_len; |
| michael@0 | 98 | return tbl; |
| michael@0 | 99 | } |
| michael@0 | 100 | |
| michael@0 | 101 | void FileFace::rel_table_fn(const void* appFaceHandle, const void *table_buffer) |
| michael@0 | 102 | { |
| michael@0 | 103 | if (appFaceHandle == 0) return; |
| michael@0 | 104 | |
| michael@0 | 105 | free(const_cast<void *>(table_buffer)); |
| michael@0 | 106 | } |
| michael@0 | 107 | |
| michael@0 | 108 | const gr_face_ops FileFace::ops = { sizeof FileFace::ops, &FileFace::get_table_fn, &FileFace::rel_table_fn }; |
| michael@0 | 109 | |
| michael@0 | 110 | |
| michael@0 | 111 | #endif //!GRAPHITE2_NFILEFACE |
