Pd's GUI is written in Tcl/Tk, so you'll need to find a Tk widget that
allows you to write to it. I think if you want to write bitmaps, then
you should look at the Tk 'photo' widget. You would probably then send
the bitmap data via shared memory or a socket.
http://tcl.tk/man/tcl8.4/TkCmd/photo.htm
There is a rough Pd external based on the photo widget if you want an
example. But it uses the 0.43 tcl command 'pdsend' rather than the
old version which was just called 'pd'. Another example is
pix_preview in pdvjtools.
https://pure-data.svn.sourceforge.net/viewvc/pure-data/trunk/externals/tkwidgets/
http://pure-data.svn.sourceforge.net/viewvc/pure-data/trunk/externals/pdvjtools
.hc
On Sep 8, 2010, at 10:16 AM, Dominique Fober wrote:
Hi,
I'm currently developing a Pure Data external to display music
scores based on the Guido Engine (see the GuidoEngine project at http://guidolib.sourceforge.net
).
Actually, the Guido engine makes use of its own graphic device
abstraction, build on top of Cairo on Linux, Quartz on Mac OS X, GDI
or GDI+ on windows. It supports also a Qt based device...
I've already identified the t_widgetbehavior struct to be notified
of my object's lifetime events (although the role of the different
fields is not always clear to me). But the question is how can I
access to a native graphic context? Another solution could be to
draw offscreen and to copy the bitmap data to a pd bitmap provided
that such functionality exists?
--
Dominique
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