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Re: [ft-devel] `gasp' table version 1 and update to `head'


From: George Williams
Subject: Re: [ft-devel] `gasp' table version 1 and update to `head'
Date: 08 Dec 2006 05:33:27 -0800

On Fri, 2006-12-08 at 00:06, Werner LEMBERG wrote:
> Greg Hitchcock from MS provided some information regarding the gasp
> table format, version 1.  I'm only listing the differences.
> 
>   field               description
> 
>   version              1
>   rangeGaspBehavior    bit 3: GASP_SYMMETRIC_SMOOTHING
>                          Use smoothing along multiple axis with
>                          ClearType.
>                        bit 4: GASP_SYMMETRIC_SMOOTHING
>                          Use gridfitting with ClearType symmetric
>                          smoothing.
Er... Do these two bits really have the same name?

Did he provide any indication of what the default behavior was if there
was no gasp table (is it still the same as the default for a version 0
gasp table)


> Additionally, bit 13 in the `flags' field of the `head' table got a
> meaning:
> 
>   Font optimized for ClearType.  If this flag is cleared, East Asian
>   fonts in the Windows Presentation Framework (formerly known as
>   `Avalon') will not be hinted.  Setting this flag will enable
>   hinting.
Is that all it means? Or does it also disable the new gasp table bits?







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