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-rw-r--r--gfx/graphite2/src/FileFace.cpp115
1 files changed, 115 insertions, 0 deletions
diff --git a/gfx/graphite2/src/FileFace.cpp b/gfx/graphite2/src/FileFace.cpp
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+++ b/gfx/graphite2/src/FileFace.cpp
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+/* GRAPHITE2 LICENSING
+
+ Copyright 2012, SIL International
+ All rights reserved.
+
+ This library is free software; you can redistribute it and/or modify
+ it under the terms of the GNU Lesser General Public License as published
+ by the Free Software Foundation; either version 2.1 of License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should also have received a copy of the GNU Lesser General Public
+ License along with this library in the file named "LICENSE".
+ If not, write to the Free Software Foundation, 51 Franklin Street,
+ Suite 500, Boston, MA 02110-1335, USA or visit their web page on the
+ internet at http://www.fsf.org/licenses/lgpl.html.
+
+Alternatively, the contents of this file may be used under the terms of the
+Mozilla Public License (http://mozilla.org/MPL) or the GNU General Public
+License, as published by the Free Software Foundation, either version 2
+of the License or (at your option) any later version.
+*/
+#include <cstring>
+#include "inc/FileFace.h"
+
+
+#ifndef GRAPHITE2_NFILEFACE
+
+using namespace graphite2;
+
+FileFace::FileFace(const char *filename)
+: _file(fopen(filename, "rb")),
+ _file_len(0),
+ _header_tbl(NULL),
+ _table_dir(NULL)
+{
+ if (!_file) return;
+
+ if (fseek(_file, 0, SEEK_END)) return;
+ _file_len = ftell(_file);
+ if (fseek(_file, 0, SEEK_SET)) return;
+
+ size_t tbl_offset, tbl_len;
+
+ // Get the header.
+ if (!TtfUtil::GetHeaderInfo(tbl_offset, tbl_len)) return;
+ if (fseek(_file, long(tbl_offset), SEEK_SET)) return;
+ _header_tbl = (TtfUtil::Sfnt::OffsetSubTable*)gralloc<char>(tbl_len);
+ if (_header_tbl)
+ {
+ if (fread(_header_tbl, 1, tbl_len, _file) != tbl_len) return;
+ if (!TtfUtil::CheckHeader(_header_tbl)) return;
+ }
+
+ // Get the table directory
+ if (!TtfUtil::GetTableDirInfo(_header_tbl, tbl_offset, tbl_len)) return;
+ _table_dir = (TtfUtil::Sfnt::OffsetSubTable::Entry*)gralloc<char>(tbl_len);
+ if (fseek(_file, long(tbl_offset), SEEK_SET)) return;
+ if (_table_dir && fread(_table_dir, 1, tbl_len, _file) != tbl_len)
+ {
+ free(_table_dir);
+ _table_dir = NULL;
+ }
+ return;
+}
+
+FileFace::~FileFace()
+{
+ free(_table_dir);
+ free(_header_tbl);
+ if (_file)
+ fclose(_file);
+}
+
+
+const void *FileFace::get_table_fn(const void* appFaceHandle, unsigned int name, size_t *len)
+{
+ if (appFaceHandle == 0) return 0;
+ const FileFace & file_face = *static_cast<const FileFace *>(appFaceHandle);
+
+ void *tbl;
+ size_t tbl_offset, tbl_len;
+ if (!TtfUtil::GetTableInfo(name, file_face._header_tbl, file_face._table_dir, tbl_offset, tbl_len))
+ return 0;
+
+ if (tbl_offset > file_face._file_len || tbl_len > file_face._file_len - tbl_offset
+ || fseek(file_face._file, long(tbl_offset), SEEK_SET) != 0)
+ return 0;
+
+ tbl = malloc(tbl_len);
+ if (!tbl || fread(tbl, 1, tbl_len, file_face._file) != tbl_len)
+ {
+ free(tbl);
+ return 0;
+ }
+
+ if (len) *len = tbl_len;
+ return tbl;
+}
+
+void FileFace::rel_table_fn(const void* appFaceHandle, const void *table_buffer)
+{
+ if (appFaceHandle == 0) return;
+
+ free(const_cast<void *>(table_buffer));
+}
+
+const gr_face_ops FileFace::ops = { sizeof FileFace::ops, &FileFace::get_table_fn, &FileFace::rel_table_fn };
+
+
+#endif //!GRAPHITE2_NFILEFACE