Re: gEDA-user: )(

[Peter Clifton <pcjc2@xxxxxxxxx>]

On Fri, 2009-10-02 at 19:46 +0000, Frank Bergmann wrote:
> On Fri, 02 Oct 2009 20:14:46 +0100, Peter Clifton wrote:
> 
> > On Fri, 2009-10-02 at 18:59 +0000, Frank Bergmann wrote:
> >> Is the code you have trouble with already in your git repo?
> > 
> > git clone git://repo.or.cz/geda-pcb/pcjc2.git cd pcjc2
> > git checkout -b before_pours origin/before_pours autogen.sh
> > configure --disable-doc
> > make install
> > 
> > (Copied from Ethan's instructions.. I think they are right!)
> 
> Yes they work.
> But sorry, how can I try to reproduce the bug with the
> glClear(GL_STENCIL_BUFFER_BIT)?

Probably down to the GL implementation. I'm only noticing it with the
latest MESA releases.

If you open PCB, then close the library window immediately (without
selecting anything). If the bug is present - you will find that the main
rendering window is not cleared between redraws and builds up mess,
cursor trails etc..

> >> And is the step towards OpenGL the next big step in pcb (gtkhid)
> >> development?
> > 
> > Possibly.. although I'm not sure how much time I can commit to it (or
> > when).
> 
> Some weeks ago I though about this...
> Basically its an GtkWitget with gl-capabilities (or likewise) which is
> than added to an GtkContainer. Its just the same like the current gtk
> code do.


> So with some rework (separate the gtk and gl drawing functions)

The GL drawing routines are already separated into a common file - with
the exception of expose handler setup / teardown (those could be moved
too I guess).

Some code will be custom to GTK+GL, rather than purely generic GL, but
some could be factored out.

> it should be possible to let the user decide which rendering method is
> used (maybe even at runtime by switching the GtkWidget from to gtk/gl).
> I am right?

Should be possible - although I did start by ripping out the GTK
rendering code, so some effort will have to be applied to put it back!

Best wishes,

Peter C.




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