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List:       koffice-devel
Subject:    Re: [PATCH] Limit KoPicture's memory usage
From:       David Faure <david () mandrakesoft ! com>
Date:       2002-08-07 10:58:40
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On Wednesday 07 August 2002 12:15, kudling@kde.org wrote:
> > I mean, if it does it the way kimgio does, then it'll have the same problem
> > (having to "heuristically" determine the transparent part of the pixmap).
> > Or do you mean, using gs to draw directly to the screen, like e.g. kghostview
> > does? (This sounds VERY slow...)
> 
> As a sidenote: karbon is able to import EPS for a long time now:
> http://www.xs4all.nl/~rwlbuis/karbon/pics/epsimport.png
> 
> Well, zooming vector graphics is faster than scaling pixmaps, and you
> automatically know where the output should be transparent.
> I'm not sure if it makes sense to create a tiny-karbon part, just to
> read  and render EPS, to serve the rest of koffice.

This sounds VERY good to me. It's actually the right fix. Using a vector 
graphics component to render vector graphics. Makes perfect sense.
Much better than "pixelizing" for the current zoom level.

However a real embedded object sounds a bit too much (e.g. if I embed
an EPS file I don't want to edit it, I'm no artist ;), and we also want to save
back as EPS (to preserve exact contents). Someone who wants to edit the
graphic can always explicitely embed karbon and load from there, of course.

This leads to two solutions for EPS handling:
* is it possible to directly convert EPS to QPicture, using something like
karbon's EPS importer? After all Qt can render vector graphics already, all we
need is to pass it the right data, no?
* the other possibility is a library containing karbon's core painting
stuff, and KoPictureEPS would use it, with the EPS importer.

- -- 
David FAURE, david@mandrakesoft.com, faure@kde.org
http://people.mandrakesoft.com/~david/
Contributing to: http://www.konqueror.org/, http://www.koffice.org/
Back from holidays
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