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Re: [Devel] Freetype 2.1.2 & rotated text


From: Werner LEMBERG
Subject: Re: [Devel] Freetype 2.1.2 & rotated text
Date: Thu, 27 Jun 2002 11:53:16 +0200 (CEST)

> It's probably something that I should have looked more deeply before
> the release, but why do you consider the "old" implementation of
> FT_Vector_Transform buggy ???

I was irritated by the word `matrix'.  Taking (x,y) as a vector,
performing multiplication in the mathematical sense, you get a
different result.  Maybe it is better to use the word `coefficient
field' instead of `matrix' to avoid the error I've made.

> Note also that the OpenType specification doesn't specify wether a
> transformation matrix within a composite glyph is stored [ xx xy yx yy ]
> or [ xx yx xy yy ] (according to the FT_Matrix definition)
> 
> The Apple TrueType specification suggests that it's really
> [ xx yx xy yy ] however. The TrueType loader expects [ xx xy yx yy ]

I've sent a query to the opentype list.


    Werner



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