Re: Need help on dvi viewer with freetype

[Tom Kacvinsky]

Well, it is not the descender depth that is the problem; I just found
another glyph (/contintegraldisplay) that has matching metrics, and it
displays just fine.  As do other glyphs with deeper descenders.

Still looking at the font...

On Sun, 8 Oct 2000, Tom Kacvinsky wrote:

> Unlike the other fonts from the Computer Modern family, CMEX10 has
> many glyphs with *deep* descenders.  These glyphs are completely
> below the baseline and are in excess of 1500 Type 1 units (1000 Type 1
> units per em) deep.  I suspect that this is the cause of the problem.
> I am looking into it right now; ftview fails to display glyph number
> 90 (/integraldisplay).
> 
> Tom
> 
> On Sun, 8 Oct 2000 address@hidden wrote:
> 
> > hi! right now i have a pretty functional dvi viewer written for ggi
> > and using freetype for fonts. sometimes, however, weird things happen,
> > and i hope someone can help me.
> > 
> > as an example, if i'm viewing a file that uses cmex10, for example:
> > when the dvi files uses glyph number 90, freetype signals an error.
> > here's what happens: the code below, executed with ch=90, and
> > curr_font->face being from cmex10.pfb, scaled correctly
> > 
> > -----------------
> > if(FT_Load_Glyph(curr_font->face,ch,FT_LOAD_NO_HINTING) ||
> >    FT_Get_Glyph(curr_font->face->glyph,curr_font->glyphs+ch))
> > {
> >   fprintf(stderr,"Could not load glyph %d from font 
> > %d.\n",ch,curr_font->number);
> >   terminate(1);
> > }
> > -----------------
> > 
> > terminates my program (could not load glyph 90 from font 18). i would
> > like to release my viewer for the public, but while these types of
> > errors keep popping up i can't... (btw, that never happens with cmr10
> > and the likes. it also works fine with other glyphs from cmex10) since
> > i'm no font expert, i hope some of you guys can pinpoint where the
> > error is occurring (in freetype, in cmex10, encoding, my code...).
> > 
> > thanks!
> > 
> > --
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> > Loses both and deserves neither
> > 
>