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Re: [Groff] Proposal for raster graphics extensions to gpic
From: |
Werner LEMBERG |
Subject: |
Re: [Groff] Proposal for raster graphics extensions to gpic |
Date: |
Sat, 16 Nov 2002 23:46:12 +0100 (CET) |
> > The next thing on the agenda would be to do changes to groff. This
> > will allow support for devices other than postscript. I think the
> > best way is to introduce a new general escape sequence for
> > handling images, akin to the \X'ps: import ...'. But that will
> > really be a technicality, the groff user will only need to concern
> > herself about the gpic image object.
>
> Hmm, A new escape sequence is probably not needed; I can imagine
> that e.g.
>
> \X'pnm: import ...'
>
> will do the trick, and it is up to the device driver to interpret
> this correctly. The only necessary command would be a pendant to
> `.psbb', e.g. `.pnmbb', to get the bounding box of the image. The
> appropriate macro would be then called `.PNMPIC'.
After some more thinking, I propose the following:
. Change readsize_pbm to readsize_pam, the (new) `mother' of all pnm
formats. See pam(5) for more details.
. Move the routines readsize_{pam,ps} into the libgroff library,
unifying it with the code for gtroff's `.psbb' request (which
should also be moved into libgroff).
. It should be straightforward to implement a `.pambb' request for
gtroff.
. Use the \X'pam: ...' syntax (or perhaps a more general
\X'image: <format>: ...') to pass the image to the device driver.
What do you think?
Werner
PS: Please use `diff -u' relative to the current CVS.
- Re: [Groff] Proposal for raster graphics extensions to gpic, (continued)
- Re: [Groff] Proposal for raster graphics extensions to gpic, Egil Kvaleberg, 2002/11/17
- Re: [Groff] Proposal for raster graphics extensions to gpic, Ralph Corderoy, 2002/11/17
- Re: [Groff] Proposal for raster graphics extensions to gpic, Egil Kvaleberg, 2002/11/17
- Re: [Groff] Proposal for raster graphics extensions to gpic, Werner LEMBERG, 2002/11/18
- Re: [Groff] Proposal for raster graphics extensions to gpic, Ralph Corderoy, 2002/11/18
- Re: [Groff] Proposal for raster graphics extensions to gpic, Werner LEMBERG, 2002/11/17
- Re: [Groff] Proposal for raster graphics extensions to gpic, Egil Kvaleberg, 2002/11/18
- Re: [Groff] Proposal for raster graphics extensions to gpic, Werner LEMBERG, 2002/11/20
- Re: [Groff] Proposal for raster graphics extensions to gpic, Ralph Corderoy, 2002/11/17
- Re: [Groff] Proposal for raster graphics extensions to gpic, Egil Kvaleberg, 2002/11/17
Re: [Groff] Proposal for raster graphics extensions to gpic,
Werner LEMBERG <=
RE: [Groff] Proposal for raster graphics extensions to gpic, James Deri, 2002/11/18