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Rewrite handling of IGNORE_SPECIAL_MARKS to be properly "ignore marks of 

Tue Jul 29 09:58:13 2003  Owen Taylor  <otaylor@redhat.com>

        * pango/opentype/ftxgdef.c (Check_Property): Rewrite
        handling of IGNORE_SPECIAL_MARKS to be properly
        "ignore marks of attachment type different than
        specified. (#118456, Kailash C. Chowksey)
This commit is contained in:
Owen Taylor 2003-07-29 14:21:54 +00:00 committed by Owen Taylor
parent 8247acad79
commit 46d379596d
1 changed files with 28 additions and 9 deletions
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37
src/ftxgdef.c
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@ -1166,20 +1166,39 @@
if ( gdef )
{
FT_UShort basic_glyph_class;
FT_UShort desired_attachment_class;
error = TT_GDEF_Get_Glyph_Property( gdef, index, property );
if ( error )
return error;
if ( flags & IGNORE_SPECIAL_MARKS )
{
/* This is OpenType 1.2 */
/* If the glyph was found in the MarkAttachmentClass table,
* then that class value is the high byte of the result,
* otherwise the low byte contains the basic type of the glyph
* as defined by the GlyphClassDef table.
*/
if ( *property & IGNORE_SPECIAL_MARKS )
basic_glyph_class = TTO_MARK;
else
basic_glyph_class = *property;
if ( (flags & 0xFF00) != *property )
return TTO_Err_Not_Covered;
}
else {
if ( flags & *property )
return TTO_Err_Not_Covered;
/* Return Not_Covered, if, for example, basic_glyph_class
* is TTO_LIGATURE and LookFlags includes IGNORE_LIGATURES
*/
if ( flags & basic_glyph_class )
return TTO_Err_Not_Covered;
/* The high byte of LookupFlags has the meaning
* "ignore marks of attachment type different than
* the attachment type specified."
*/
desired_attachment_class = flags & IGNORE_SPECIAL_MARKS;
if ( desired_attachment_class )
{
if ( basic_glyph_class == TTO_MARK &&
*property != desired_attachment_class )
return TTO_Err_Not_Covered;
}
}