[Devel] Re: Oblique Type1 fonts leave first glyph roman

[Tom Kacvinsky]

Hi all,

The problem is located somewhere in the Type 1 glyph loader (T1_load_Glyph), the
"base" glyph loader (FT_Load_Glyph), and the autohinter functions.

In particular, it seems related to use of FT_LOAD_NO_RECURSE in load_flags.  For
some reason, the first glyph doesn't get proper treatment, but the remaining
glyphs do.

I am sorry, but this one is in David's hands.  I can't even come close to
grokking the autohinter code.

Tom

On Sat, 16 Dec 2000, Tom Kacvinsky wrote:

> I *think* the bug is in the autohinter.  It autohinting is turned off, the 
> problem
> goes away...
>
> Tom
>
> On Sat, 16 Dec 2000, Tom Kacvinsky wrote:
>
> > OK, I get this behavior with Lucida Bright Oblique (a B&H font hinted, 
> > etc...
> > by Y&Y).  ftview doesn't have a problem with the font, but ftstring does.  
> > This
> > first glyph is indeed rendered upright instead of obliqued.  Hrmmm...
> >
> > I will look into this.
> >
> > Tom
> >
> > On Thu, 14 Dec 2000, Keith Packard wrote:
> >
> > >
> > > XFree86 was given six Type1 faces by Bigelow and Holmes, roman and oblique
> > > for a serif, sans and mono-spaced version in their lucidux style.  When I
> > > rasterize the oblique versions with FreeType 2.0.1, the first glyph which
> > > is rasterized is upright rather than oblique.  Here are the matrices from
> > > the two serifed faces:
> > >
> > > % oblique matrix from lcdxro.pfa
> > > /FontMatrix [0.001 0 0.0002 0.001 0 0] readonly def
> > >
> > > % roman matrix from lcdxrr.pfa
> > > /FontMatrix [0.001 0 0 0.001 0 0] readonly def
> > >
> > > I can't think what I might be doing wrong in using the face that would
> > > cause this problem.  Also interesting:
> > >
> > >   The IBM Type1 rasterizer in the X server works fine.
> > >
> > >   The error occurs with either monochrome or grayscale rendering
> > >
> > >   It doesn't matter what glyph is rasterized first, even ' ' makes
> > >   further glyphs work correctly.
> > >
> >
>
>
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