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Posted to fop-dev@xmlgraphics.apache.org by Manuel Mall <mm...@arcus.com.au> on 2005/09/16 09:08:24 UTC
Sub and super scripts
What is the correct amount of baseline shift to apply for sub and super
scripts? Batik seems to use +/- 0.5 * ascender height. Is that the
common way of doing it? The spec says only: "The offset ... is
determined using the font data for the nominal font".
Thanks
Manuel
Re: Sub and super scripts
Posted by Jeremias Maerki <de...@jeremias-maerki.ch>.
AFAICS, no, it doesn't do that, yet.
On 16.09.2005 09:39:55 Manuel Mall wrote:
> Vincent,
>
> does FOray font expose this type of information Jeremias described
> below?
>
> Manuel
> On Fri, 16 Sep 2005 03:36 pm, Jeremias Maerki wrote:
> > It's probably easiest for now to do as Batik does. However, Type 1
> > fonts provide information about sub and super scripts (size and
> > placement) in the PFM file. That data is currently not parsed. I
> > assume there's something similar in TrueType. So ideally, the font
> > would supply the information how exactly to handle super/sub script.
> > But keeping it simple for now will certainly not hurt.
> >
> > On 16.09.2005 09:08:24 Manuel Mall wrote:
> > > What is the correct amount of baseline shift to apply for sub and
> > > super scripts? Batik seems to use +/- 0.5 * ascender height. Is
> > > that the common way of doing it? The spec says only: "The offset
> > > ... is determined using the font data for the nominal font".
> > >
> > > Thanks
> > >
> > > Manuel
> >
> > Jeremias Maerki
Jeremias Maerki
Re: Sub and super scripts
Posted by Vincent Hennebert <vi...@enseeiht.fr>.
Manuel Mall a écrit :
> Vincent,
>
> does FOray font expose this type of information Jeremias described
> below?
Not yet. I'll expose the problem on FOray-dev.
If you choose to implement this functionality now I suggest you to make things
very simple, as Jeremias said. This wouldn't be completely useless anyway: this
would help me to adapt FOrayFont thereafter, as I'll easily find where to work
in the code!
Vincent
> On Fri, 16 Sep 2005 03:36 pm, Jeremias Maerki wrote:
>
>>It's probably easiest for now to do as Batik does. However, Type 1
>>fonts provide information about sub and super scripts (size and
>>placement) in the PFM file. That data is currently not parsed. I
>>assume there's something similar in TrueType. So ideally, the font
>>would supply the information how exactly to handle super/sub script.
>>But keeping it simple for now will certainly not hurt.
>>
>>On 16.09.2005 09:08:24 Manuel Mall wrote:
>>
>>>What is the correct amount of baseline shift to apply for sub and
>>>super scripts? Batik seems to use +/- 0.5 * ascender height. Is
>>>that the common way of doing it? The spec says only: "The offset
>>>... is determined using the font data for the nominal font".
>>>
>>>Thanks
>>>
>>>Manuel
>>
>>Jeremias Maerki
Re: Sub and super scripts
Posted by Manuel Mall <mm...@arcus.com.au>.
Vincent,
does FOray font expose this type of information Jeremias described
below?
Manuel
On Fri, 16 Sep 2005 03:36 pm, Jeremias Maerki wrote:
> It's probably easiest for now to do as Batik does. However, Type 1
> fonts provide information about sub and super scripts (size and
> placement) in the PFM file. That data is currently not parsed. I
> assume there's something similar in TrueType. So ideally, the font
> would supply the information how exactly to handle super/sub script.
> But keeping it simple for now will certainly not hurt.
>
> On 16.09.2005 09:08:24 Manuel Mall wrote:
> > What is the correct amount of baseline shift to apply for sub and
> > super scripts? Batik seems to use +/- 0.5 * ascender height. Is
> > that the common way of doing it? The spec says only: "The offset
> > ... is determined using the font data for the nominal font".
> >
> > Thanks
> >
> > Manuel
>
> Jeremias Maerki
Re: Sub and super scripts
Posted by Jeremias Maerki <de...@jeremias-maerki.ch>.
It's probably easiest for now to do as Batik does. However, Type 1 fonts
provide information about sub and super scripts (size and placement) in
the PFM file. That data is currently not parsed. I assume there's
something similar in TrueType. So ideally, the font would supply the
information how exactly to handle super/sub script. But keeping it
simple for now will certainly not hurt.
On 16.09.2005 09:08:24 Manuel Mall wrote:
> What is the correct amount of baseline shift to apply for sub and super
> scripts? Batik seems to use +/- 0.5 * ascender height. Is that the
> common way of doing it? The spec says only: "The offset ... is
> determined using the font data for the nominal font".
>
> Thanks
>
> Manuel
Jeremias Maerki