matplotlib-devel Mailing List for matplotlib

>>>>> "Vittorio" == Vittorio Palmisano <re...@em...> writes:
 Vittorio> I have rebuild the package with support for gtkgd. I
 Vittorio> have tried to build also the agg backend, but I can't
 Vittorio> find the source package for this library! I've found two
 Vittorio> version: one from http://antigrain.com and another from
 Vittorio> scipy cvs, but seems that there are some missing headers
 Vittorio> when I compile the backend. I have also packaged the
 Vittorio> gdmodule from
 Vittorio> http://newcenturycomputers.net/projects/gdmodule.html
 Vittorio> and the ttfquery module from
 Vittorio> http://sourceforge.net/projects/ttfquery/, all the debs
 Vittorio> are on http://anakonda.altervista.org/debian/
Wow, amazing work. 
You may want to look at the header of matplotlib.backends.backend_agg
- this includes some install instructions, where to get agg, etc...
However, that may not be necessary.
I have built a new sdist that has all the prereqs for agg built in
(fonttools, ttfquery, and agg2). You just have to set BUILD_AGG in
setup.py and it should build, as long as your compiler is fairly
recent. I'll leave it to you whether you want to use debian to get
fontools and ttfquery, or use the ones included with matplotlib. I
stripped all the fluff out of those 3 packages and with everything
included the sdist is still under a megabyte.
 http://nitace.bsd.uchicago.edu:8080/files/share/matplotlib-0.50p.tar.gz
I used this to build an all-in-one win32 installer, which will be nice
because now win32 users with Numeric can make PS and PNG plots out of
the box (zlib, libpng, freetype are statically built in).
I'm going to upload the snapshot if you want to experiment with it. I
should warn you though: I forgot yesterday that there is still a
critical bug in wx that must be repaired. Thus there will be one more
revision following this one. (Sorry)
JDH

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John Hunter ha scritto:
>
> I have a couple of favors to ask of you. The 0.50e release on the web
> site that you built against was an alpha release of the 0.50 series
> and a fair number of features, optimizations and bug fixes have been
> added since then. The current snapshot has been well tested and is in
> good shape - would you be willing to build the package one more time
> against it?
>
> http://nitace.bsd.uchicago.edu:8080/files/share/matplotlib-0.50m.tar.gz
>
> Now a couple of questions. I need to update the debian section of the
> web site. Could you write something explaining how a relatively
> novice debian user would go about getting python-matplotlib? Ie, what
> would they need to put in /etc/apt/sources.list, what commands would
> they need to issue from the shell, which of the backends are
> installed, etc... How do you handle the various backends, eg, gd, wx,
> pygtk and so on.
>
> Just to give you an idea of how much has changed since the 0.50e alpha
> release, in addition to the aforementioned bugs and optimizations,
> there are 2 new backends (paint and agg), a new Table class, and a new
> matlab function table to interface to it, and several examples. Note
> if you do rebuild, there is a src dir you'll want to include.
>
I have rebuild the package with support for gtkgd.
I have tried to build also the agg backend, but I can't find the source package
for this library! I've found two version: one from http://antigrain.com and
another from scipy cvs, but seems that there are some missing headers when I
compile the backend.
I have also packaged the gdmodule from
http://newcenturycomputers.net/projects/gdmodule.html and the ttfquery module
from http://sourceforge.net/projects/ttfquery/, all the debs are on
http://anakonda.altervista.org/debian/
I can write some documentation about debian packages required, once I've tested
them, but only for the next weekend, bye
- --
/Vittorio Palmisano/
Home Page: http://redclay.altervista.org
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Almost all of the backends (save postscript) either support freetype
or are capable or supporting it. We need a good cross-platform
freetype font finder package. Right now, we have fonttools and
TTFQuery, which get the job done. But they bring a lot of extra
installation overhead.
For the postscript backend, I wrote a standalone AFM parser which has
worked well - the alternative was to require fonttools, which is
larger than all of matplotlib combined. I would like to have the same
for TTF files - a small, free standing module with no extrinsic
dependencies that we can ship with matplotlib.
A introduction to the ttf specification can be found here
http://scripts.sil.org/cms/scripts/page.php?site_id=nrsi&item_id=IWS-Chapter08.
We don't need much out of these files: things like character sizes,
kerning distances, etc, are already handled by the freetype extension
modules, eg, paint.font (which I also used for agg). 
What we need is for someone to identify the relevant *.ttf dirs on the
major platforms (you can extract most of this information from
TTFQuery), and parse enough of the ttf file to get family name, font
style, weight, etc.... You could either pull out the relevant bits
from fonttools and ttfquery or just roll your own. Ideally, you
should be able to take a matplotlib.text.Text instance and returns the
ttf file which is the closest match for you on your system, falling
back on Vera (which ships with matplotlib) as the default.
I notice on
http://scripts.sil.org/cms/scripts/page.php?site_id=nrsi&item_id=IWS-Chapter08#3054f18b
there is a field for "Postscript name for the font" which would be
nice to incorporate for backend switching (saving PS from GTK,
etc...).
Anyway, it would be a very useful addition to matplotlib, and would
speed the process of standardizing fonts across the backends.
JDH

Attached is a new version of backend_ps.py with two new functions,
landscape() and portrait().
Someone who actually understands post-script should check these fixes
out -- I know next to nothing about it, but the fixes seem to do the
trick, although I'm sure there is some other incantation I'm supposed to
put in the postscript so that viewers realise it is landscape and show
it that way.
Also attached is a new version of axis.py with a very minor mod to
format_tickval that ensures that the plot doesn't end up with labels
like: 199999999 in the case where the tickloc is just a shade under a
whole number.
John
On Tue, 2004年02月10日 at 15:05, John Hunter wrote: 
> >>>>> "John" == John Gill <jn...@eu...> writes:
> 
> John> I have some plots I'd like to print out and they would make
> John> better use of the paper if they were done landscape.
> 
> John> Can the postscript backend do this?
> 
> Hi John,
> 
> I haven't had time to take a close look at this. My initial
> suggestions is to experiment with the paper size
> 
> import matplotlib
> matplotlib.use('PS')
> import matplotlib.backends.backend_ps as backend_ps
> backend_ps.defaultPaperSize = 11,8.5 # default is 8.5, 11
> 
> You may also have to specify a landscape portrait at print time, or
> rotate it.
> 
> I'll take a closer look later.
> 
> JDH
> 

>
> On the topic of releases: David, my target date is early next week.
> Do you think you can get pypaint up by then?
>
> Thanks again,
> JDH
>
Hi John,
Sorry, last email wasn't to the list. From posts you've made, it looks like
you've made some changes to pypaint. Do you want those committed before a
pypaint release? Apart from that, I'm just tying up some loose ends, and
then I'll be able to make the release - hopefully today, but maybe only
Monday if you want your changes added.
thanks,
David Moore
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>>>>> "Vittorio" == Vittorio Palmisano <re...@em...> writes:
 Vittorio> Ok, I have fixed this problems, now "lintian -i
 Vittorio> python-matplotlib_0.50-1_i386.changes" doesn't say
 Vittorio> nothing. I have updated the files on my repository, bye
Hi Vittorio, thanks a bunch for doing this. A lot of people have
asked for this, and there's been incremental progress here and there,
but I'm glad to see you got everything done.
I have a couple of favors to ask of you. The 0.50e release on the web
site that you built against was an alpha release of the 0.50 series
and a fair number of features, optimizations and bug fixes have been
added since then. The current snapshot has been well tested and is in
good shape - would you be willing to build the package one more time
against it?
 http://nitace.bsd.uchicago.edu:8080/files/share/matplotlib-0.50m.tar.gz
Now a couple of questions. I need to update the debian section of the
web site. Could you write something explaining how a relatively
novice debian user would go about getting python-matplotlib? Ie, what
would they need to put in /etc/apt/sources.list, what commands would
they need to issue from the shell, which of the backends are
installed, etc... How do you handle the various backends, eg, gd, wx,
pygtk and so on.
Just to give you an idea of how much has changed since the 0.50e alpha
release, in addition to the aforementioned bugs and optimizations,
there are 2 new backends (paint and agg), a new Table class, and a new
matlab function table to interface to it, and several examples. Note
if you do rebuild, there is a src dir you'll want to include.
On the topic of releases: David, my target date is early next week.
Do you think you can get pypaint up by then? 
Thanks again,
JDH