matplotlib-devel

[matplotlib-devel] SVG backend

[Jared W. <wah...@um...>]

Here's a more complete version. It works with matplotlib-0.54 now, and
I've tested it with a few of the example scripts, though I'm sure there
are bugs.  It doesn't do images or mathtext yet.

I found out that Inkscape doesn't support clipping yet, so it's sort of
useless right now for some plots.  The viewer I used to test the backend
was the Adobe SVG plugin, which is available for lots of platforms:
http://www.adobe.com/svg/

It still might be useful to implement PolygonCollections, because it
might decrease the file size if, for the markers, we define a shape with
its properties, and then just translate it to make copies. I also just
noticed the 'marker' element, which looks promising.

Jared

Re: [matplotlib-devel] SVG backend

[John H. <jdh...@ac...>]

>>>>> "Jared" == Jared Wahlstrand <wah...@um...> writes:

    Jared> Here's a more complete version. It works with
    Jared> matplotlib-0.54 now, and I've tested it with a few of the
    Jared> example scripts, though I'm sure there are bugs.  It
    Jared> doesn't do images or mathtext yet.

I just tried it and actually got simple_plot to work - excellent!

I'm about to do a bug fix release of 0.54.  Would you like to release
the code under the matplotlib license?  If so I'll include it, but
hold off on announcing it until you are ready.

Another thing that might be useful for SVG is to add grouping
elements.  Eg, in axes.draw we could add 

def draw(...)

  renderer.begin_group('axes')
  ..plot a bunch of stuff
  renderer.end_group('axes')

backend renderers that don't support groupings could just pass on
these calls, but for those who do, like svg, we could add the
appropriate grouping commands.  Ditto for legends, axis, etc.  This
might help the matplotlib svg output play nicely with svg editors.


JDH

Re: [matplotlib-devel] SVG backend

[Andrew S. <str...@as...>]

On May 27, 2004, at 10:31 AM, John Hunter wrote:
> Another thing that might be useful for SVG is to add grouping
> elements.  Eg, in axes.draw we could add
>
> def draw(...)
>
>   renderer.begin_group('axes')
>   ..plot a bunch of stuff
>   renderer.end_group('axes')

Not that I have any clue how it's implemented, but Adobe Illustrator 
somehow does this in (E)PS, and PDF formats.  It would be so cool if 
matplotlib achieved this, too.

But, as matplotlib gets better and better, that becomes less and less 
necessary.

Cheers!
Andrew

Re: [matplotlib-devel] SVG backend

[Paul B. <ba...@st...>]

Jared Wahlstrand wrote:
> Here's a more complete version. It works with matplotlib-0.54 now, and
> I've tested it with a few of the example scripts, though I'm sure there
> are bugs.  It doesn't do images or mathtext yet.
> 
> I found out that Inkscape doesn't support clipping yet, so it's sort of
> useless right now for some plots.  The viewer I used to test the backend
> was the Adobe SVG plugin, which is available for lots of platforms:
> http://www.adobe.com/svg/
> 
> It still might be useful to implement PolygonCollections, because it
> might decrease the file size if, for the markers, we define a shape with
> its properties, and then just translate it to make copies. I also just
> noticed the 'marker' element, which looks promising.

Nice work.  This was on my ToDo list, but it looks like you beat me to it.  I'll
try running it through its paces in the next few days to how it does.

Does this backend use the font_manager to find fonts or does it use the viewers
font manager.  They are both based on the same principles, but the viewer may do
a better job, so you might want to consider by-passing the font-manager.

-- 
Paul Barrett, PhD      Space Telescope Science Institute
Phone: 410-338-4475    ESS/Science Software Branch
FAX:   410-338-4767    Baltimore, MD 21218