François Pinard <[EMAIL PROTECTED]> writes:
> Matt Wilson <[EMAIL PROTECTED]> écrit:
>
> > The easiest way to do this by far is to use the canvas. [...] The canvas
> > does all this for you.
>
> Thanks for the example, Matt, but this is not pure `pygtk' (or GDK) anymore,
> if it needs `gnome.ui' and GnomeCanvas.
I don't think there's a way to do what you want in pure pygtk.
[...]
> So, I would like to know if/how I can, using GTK and GDK, and the `pygtk'
> interface to both, create and handle an alpha channel, and feel able do
> anti-alias myself if I want to (that is, if GTK has no provision for it).
Well, since doing it yourself probably requires a C-module, you might as
well sue libart for anti-aliased rendering. libart is the rendering
library for the anti-aliased gnome canvas and quite independent from
gnome.
FWIW, the development versions of Sketch contain some python-bindings
for libart that can render into libart rgb buffers and even into PIL
images (including alpha channels, but I haven't really tested that).
These bindings are somewhat sketch specific, though, so it might not be
all that easy to adapt them to a different application.
--
Bernhard Herzog | Sketch, a drawing program for Unix
[EMAIL PROTECTED] | http://sketch.sourceforge.net/
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