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List:       freetype-devel
Subject:    [Devel] [Fwd: RE: [OpenType]  Phantom points...]
From:       George Williams <gww () silcom ! com>
Date:       2004-03-11 23:16:18
Message-ID: 1079046977.2051.79.camel () lynch
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Werner, Antoine, I expect you saw this but in case you did not I post it
here...

> I must add that obviously, the "n+2" and "n+3" do not come neither from the
> 'glyf' nor the 'hmtx' tables. Since it is not required, the 'vmtx' table is
> certainly not alone involved in this process. When this table is missing, I
> do not know from where come the informations. I remember Werner implementing
> some sort of hack to deal with such fonts, and comenting the hack was not
> really
-----Forwarded Message-----

> From: Greg Hitchcock <gregh@microsoft.com>
> To: opentype@topica.com
> Subject: RE: [OpenType]  Phantom points...
> Date: 11 Mar 2004 09:32:59 -0800
> 
> If there is no vmtx table, the OS/2 typoAscender/typoDescender will be
> used in conjunction with the glyph's bounding box. If no OS/2 table,
> then hhea ascent/descent will be used.
> 
> It is only meaningful to move these points if a client is using these
> points for hinted advance heights. Windows only uses them for @fonts.
> 
> Greg Hitchcock
> 
> -----Original Message-----
> From: George Williams [mailto:gww@silcom.com] 
> Sent: Wednesday, March 10, 2004 4:03 PM
> To: opentype@topica.com
> Subject: [OpenType] Phantom points...
> 
> Microsoft's OpenType spec
> 	http://www.microsoft.com/typography/otspec/instgly.doc
> says that rasterizers above 1.7 will add four phantom points.
> 
> Can anyone tell me what will be the initial placement the vertical
> phantom points in a font without a 'vmtx' table?
> 
> And what is it meaningful to move these points if there are no vertical
> metrics?
> 
> --
> OpenType - for technical issues specific to building and using OpenType
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