/* */
/* SFNT object management (base). */
/* */
-/* Copyright 1996-2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2010 by */
+/* Copyright 1996-2008, 2010-2011 by */
/* David Turner, Robert Wilhelm, and Werner Lemberg. */
/* */
/* This file is part of the FreeType project, and may only be used, */
FT_FRAME_START( 8 ),
FT_FRAME_LONG( version ),
- FT_FRAME_LONG( count ),
+ FT_FRAME_LONG( count ), /* this is ULong in the specs */
FT_FRAME_END
};
tag != TTAG_true &&
tag != TTAG_typ1 &&
tag != 0x00020000UL )
+ {
+ FT_TRACE2(( " not a font using the SFNT container format\n" ));
return SFNT_Err_Unknown_File_Format;
+ }
face->ttc_header.tag = TTAG_ttcf;
if ( FT_STREAM_READ_FIELDS( ttc_header_fields, &face->ttc_header ) )
return error;
+ if ( face->ttc_header.count == 0 )
+ return SFNT_Err_Invalid_Table;
+
+ /* a rough size estimate: let's conservatively assume that there */
+ /* is just a single table info in each subfont header (12 + 16*1 = */
+ /* 28 bytes), thus we have (at least) `12 + 4*count' bytes for the */
+ /* size of the TTC header plus `28*count' bytes for all subfont */
+ /* headers */
+ if ( (FT_ULong)face->ttc_header.count > stream->size / ( 28 + 4 ) )
+ return SFNT_Err_Array_Too_Large;
+
/* now read the offsets of each font in the file */
if ( FT_NEW_ARRAY( face->ttc_header.offsets, face->ttc_header.count ) )
return error;
{
sfnt = (SFNT_Service)FT_Get_Module_Interface( library, "sfnt" );
if ( !sfnt )
- return SFNT_Err_Invalid_File_Format;
+ {
+ FT_ERROR(( "sfnt_init_face: cannot access `sfnt' module\n" ));
+ return SFNT_Err_Missing_Module;
+ }
face->sfnt = sfnt;
face->goto_table = sfnt->goto_table;
FT_FACE_FIND_GLOBAL_SERVICE( face, face->psnames, POSTSCRIPT_CMAPS );
+ FT_TRACE2(( "SFNT driver\n" ));
+
error = sfnt_open_font( stream, face );
if ( error )
return error;
FT_UNUSED( face_index );
/* Check parameters */
-
+
{
FT_Int i;
/* do we have outlines in there? */
#ifdef FT_CONFIG_OPTION_INCREMENTAL
- has_outline = FT_BOOL( face->root.internal->incremental_interface != 0 ||
- tt_face_lookup_table( face, TTAG_glyf ) != 0 ||
- tt_face_lookup_table( face, TTAG_CFF ) != 0 );
+ has_outline = FT_BOOL( face->root.internal->incremental_interface != 0 ||
+ tt_face_lookup_table( face, TTAG_glyf ) != 0 ||
+ tt_face_lookup_table( face, TTAG_CFF ) != 0 );
#else
- has_outline = FT_BOOL( tt_face_lookup_table( face, TTAG_glyf ) != 0 ||
- tt_face_lookup_table( face, TTAG_CFF ) != 0 );
+ has_outline = FT_BOOL( tt_face_lookup_table( face, TTAG_glyf ) != 0 ||
+ tt_face_lookup_table( face, TTAG_CFF ) != 0 );
#endif
is_apple_sbit = 0;
if ( face->format_tag == TTAG_true )
{
FT_TRACE2(( "This is an SFNT Mac font.\n" ));
+
has_outline = 0;
- error = SFNT_Err_Ok;
+ error = SFNT_Err_Ok;
}
else
{
LOAD_( os2 );
if ( error )
{
- if ( error != SFNT_Err_Table_Missing )
- goto Exit;
-
+ /* we treat the table as missing if there are any errors */
face->os2.version = 0xFFFFU;
}
}
/* table cannot be used to compute the text height reliably! */
/* */
- /* The ascender/descender/height are computed from the OS/2 table */
- /* when found. Otherwise, they're taken from the horizontal */
- /* header. */
- /* */
+ /* The ascender and descender are taken from the `hhea' table. */
+ /* If zero, they are taken from the `OS/2' table. */
root->ascender = face->horizontal.Ascender;
root->descender = face->horizontal.Descender;
- root->height = (FT_Short)( root->ascender - root->descender +
- face->horizontal.Line_Gap );
-
-#if 0
- /* if the line_gap is 0, we add an extra 15% to the text height -- */
- /* this computation is based on various versions of Times New Roman */
- if ( face->horizontal.Line_Gap == 0 )
- root->height = (FT_Short)( ( root->height * 115 + 50 ) / 100 );
-#endif /* 0 */
+ root->height = (FT_Short)( root->ascender - root->descender +
+ face->horizontal.Line_Gap );
-#if 0
- /* some fonts have the OS/2 "sTypoAscender", "sTypoDescender" & */
- /* "sTypoLineGap" fields set to 0, like ARIALNB.TTF */
- if ( face->os2.version != 0xFFFFU && root->ascender )
+ if ( !( root->ascender || root->descender ) )
{
- FT_Int height;
-
+ if ( face->os2.version != 0xFFFFU )
+ {
+ if ( face->os2.sTypoAscender || face->os2.sTypoDescender )
+ {
+ root->ascender = face->os2.sTypoAscender;
+ root->descender = face->os2.sTypoDescender;
- root->ascender = face->os2.sTypoAscender;
- root->descender = -face->os2.sTypoDescender;
+ root->height = (FT_Short)( root->ascender - root->descender +
+ face->os2.sTypoLineGap );
+ }
+ else
+ {
+ root->ascender = (FT_Short)face->os2.usWinAscent;
+ root->descender = -(FT_Short)face->os2.usWinDescent;
- height = root->ascender + root->descender + face->os2.sTypoLineGap;
- if ( height > root->height )
- root->height = height;
+ root->height = (FT_UShort)( root->ascender - root->descender );
+ }
+ }
}
-#endif /* 0 */
root->max_advance_width = face->horizontal.advance_Width_Max;
root->max_advance_height = (FT_Short)( face->vertical_info
projects / framework / graphics / freetype.git / blobdiff