[tex-live] missing data files

[Heiko Oberdiek]

On Tue, Jul 28, 2009 at 03:08:39AM +0200, Heiko Oberdiek wrote:

> On Sun, Jul 26, 2009 at 04:19:41PM -0500, Karl Berry wrote:
> 
> > Hi Herbert,
> > 
> >     /graphics/pstricks/contrib/pst-geo/data/
> >     /graphics/pstricks/contrib/pst-geo/dataII/
> > 
> >     are missing. Should be installed under
> > 
> >     /tex/latex/pst-geo/data
> >     /tex/latex/pst-geo/dataII
> > 
> >     and, if possible, not as a tarzip
> > 
> > I was just copying what is on CTAN.
> > It was because they were .tgz that I put (left) them in doc.  I assume
> > having a .tgz in the runtime is useless.
> > 
> > Anyway, in this particular case, there's a bigger problem.  The
> > uncompressed dataII is some 124 megabytes.  I'm sure there is not enough
> > space for that on the DVD.  (The uncompressed 16MB of data.tgz is bad
> > enough.)
> > 
> > So I'm not sure what to do.
> 
> If the .dat files are meant for PostScript interpreters only, then
> they can be compressed using PostScript filters. I have written
> some scripts:
>   http://www.informatik.uni-freiburg.de/~oberdiek/tmp/pst-geo-compress.zip

I have updated them as Perl scripts.
Flate method is used with prediction (prediction can be turned off).

Unhappily Ghostscript has a bug regarding prediction, it is fixed in
version 8.56 (2007-03-14):

| 2006-12-11T17:30:53.980862Z L. Peter Deutsch
|
| Fixes bug: the PNG predictor filters produced incorrect data for the last
| pixel of each row.  (The encoder and decoder had matching bugs, so
| encode+decode produced the correct result!)  Fixes a diff in PS3 CET
| 23-12U-1.

Uncompressed:     134 MB
Flate:             32 MB
Flate+Prediction:  24 MB

Yours sincerely 
  Heiko <oberdiek at uni-freiburg.de>