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* src/winfonts/winfnt.c (FT_WinFNT_HeaderRec): `color_table_offset'

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has four bytes, not two.
Fix all users.
(fnt_font_load, FNT_Load_Glyph): Add more font validity tests.
This commit is contained in:
Werner Lemberg 2003-10-02 21:36:18 +00:00
parent ccdd3bebdc
commit fb06665f25
2 changed files with 29 additions and 3 deletions
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7
ChangeLog
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@ -1,3 +1,10 @@
2003-10-02 Markus F.X.J. Oberhumer <markus@oberhumer.com>
* src/winfonts/winfnt.c (FT_WinFNT_HeaderRec): `color_table_offset'
has four bytes, not two.
Fix all users.
(fnt_font_load, FNT_Load_Glyph): Add more font validity tests.
2003-10-01 David Turner <david@freetype.org>
* src/autofit/*: adding first sources of the new multi-script

25
src/winfonts/winfnt.c
View File

@ -70,7 +70,7 @@
#undef FT_STRUCTURE
#define FT_STRUCTURE FT_WinFNT_HeaderRec
FT_FRAME_START( 146 ),
FT_FRAME_START( 148 ),
FT_FRAME_USHORT_LE( version ),
FT_FRAME_ULONG_LE ( file_size ),
FT_FRAME_BYTES ( copyright, 60 ),
@ -105,7 +105,7 @@
FT_FRAME_USHORT_LE( A_space ),
FT_FRAME_USHORT_LE( B_space ),
FT_FRAME_USHORT_LE( C_space ),
FT_FRAME_USHORT_LE( color_table_offset ),
FT_FRAME_ULONG_LE ( color_table_offset ),
FT_FRAME_BYTES ( reserved1, 16 ),
FT_FRAME_END
};
@ -136,6 +136,8 @@
{
FT_Error error;
FT_WinFNT_Header header = &font->header;
FT_Bool new_format;
FT_UInt size;
/* first of all, read the FNT header */
@ -152,6 +154,16 @@
goto Exit;
}
new_format = FT_BOOL( font->header.version == 0x300 );
size = new_format ? 148 : 118;
if ( header->file_size < size )
{
FT_TRACE2(( "[not a valid FNT file]\n" ));
error = FNT_Err_Unknown_File_Format;
goto Exit;
}
/* Version 2 doesn't have these fields */
if ( header->version == 0x200 )
{
@ -572,7 +584,7 @@
len = new_format ? 6 : 4;
/* jump to glyph entry */
p = font->fnt_frame + ( new_format ? 146 : 118 ) + len * glyph_index;
p = font->fnt_frame + ( new_format ? 148 : 118 ) + len * glyph_index;
bitmap->width = FT_NEXT_SHORT_LE( p );
@ -581,6 +593,13 @@
else
offset = FT_NEXT_USHORT_LE( p );
if ( offset >= font->header.file_size )
{
FT_TRACE2(( "invalid FNT offset!\n" ));
error = FNT_Err_Invalid_File_Format;
goto Exit;
}
/* jump to glyph data */
p = font->fnt_frame + /* font->header.bits_offset */ + offset;