Re: [Devel] Metric for hat (^) vertical offset? Solved!

[Gustavo J. A. M. Carneiro]

A Qua, 2003-10-29 às 10:43, address@hidden escreveu: 
> Hi,
> 
> "Gustavo J. A. M. Carneiro" <address@hidden> wrote:
> >
> >I am indeed calling FT_Glyph_Get_CBox.  Like this:
> >
> > memset(&cbox, 0, sizeof(cbox));
> > FT_Glyph_Get_CBox(glyph, ft_glyph_bbox_subpixels, &cbox);
> > tl->cbox.xMin = MIN(tl->cbox.xMin, cbox.xMin);
> > tl->cbox.yMin = MIN(tl->cbox.yMin, cbox.yMin);
> > tl->cbox.xMax = MAX(tl->cbox.xMax, cbox.xMax);
> > tl->cbox.yMax = MAX(tl->cbox.yMax, cbox.yMax);
> 
> Silly question: What are you initializing tl->cbox to?  It occurs
> to me that the hat glyph might be entirely above y=0, but you might
> be initializing tl->cbox.yMin and tl->cbox.yMax to 0.  You need to
> initialize tl->cbox.yMin to MAX_INT, and tl->cbox.yMax to MIN_INT.
> (Similarly for xMin & xMax).

  That's not a silly question at all! :)
  I was indeed initializing to all zeroes, which is of course
incorrect.  :P
  I just changed to (+/-)MAXINT, plus some other changes elsewhere
derived from this one, and it works!!!

  Many thanks! :-)

> Kind regards,
> 
> Jon Foster
> --
> 
> 
> "Gustavo J. A. M. Carneiro" <address@hidden> wrote:
> 
> 
> A Ter, 2003-10-28 às 21:23, Werner LEMBERG escreveu:
> > > The reason why layout is failing is that freetype indicates an
> > > excessively large bounding box for the ^ glyph.
> >
> > What do you mean with `indicate'?  Normally, FreeType reports the
> > metrics given in the font.  If you want an approximation to the
> > smallest bounding box, you should call FT_Glyph_Get_CBox.
> 
>   I am indeed calling FT_Glyph_Get_CBox.  Like this:
> 
>              memset(&cbox, 0, sizeof(cbox));
>              FT_Glyph_Get_CBox(glyph, ft_glyph_bbox_subpixels, &cbox);
>              tl->cbox.xMin = MIN(tl->cbox.xMin, cbox.xMin);
>              tl->cbox.yMin = MIN(tl->cbox.yMin, cbox.yMin);
>              tl->cbox.xMax = MAX(tl->cbox.xMax, cbox.xMax);
>              tl->cbox.yMax = MAX(tl->cbox.yMax, cbox.yMax);
> 
> This code is part of the text line layout loop.  It computes the union
> of bounding boxes of all glyphs.  So, that's not it :-|
> 
> >
> >
> >     Werner
> --
> Gustavo J. A. M. Carneiro
> <address@hidden> <address@hidden>
> 
> 
> _______________________________________________
> Devel mailing list
> address@hidden
> http://www.freetype.org/mailman/listinfo/devel
> 
> 
> 
> 
> 
> 
> _______________________________________________
> Devel mailing list
> address@hidden
> http://www.freetype.org/mailman/listinfo/devel

-- 
Gustavo João Alves Marques Carneiro
<address@hidden> <address@hidden>