[GEM-dev] single buffering

[cgc at humboldtblvd.com]

Quoting ben at ekran.org:

> heya all,
> 
> I was just tinkering with an old patch and I can't get single-buffering
> to
> work. It worked before...
> 
> I'm using Chris's bianry release for OSX from two weeks ago.
> 
> The window does not complain, seems to enter single-buffering mode.
> but
> when I try and draw something (by banging on a gemhead) I get nothing
> but
> black. Changing the gemwin color does not render either, all black...
> 
> Anyhow I hope it gets fixed as its something I often use.
> 

There is no single buffering of GL contexts in OSX.  Never has been and never
will be.  There's nothing we can do about this - it was a very early Apple
design decision.

> Oh and since the gemchains are now PD messages when I break a chain
> (via
> spigot for example) do I need to hit stop rendering and start it again
> for
> Gem to register the change? (In 0.87 it looks like one had to rerender,
> on
> CVS it seems to work) Also is there a way to have a chain keep its
> texture
> data after bring broken? Even in CVS it seems breaking a chain will
> cause
> it to loose its texture.
> 

0.87 didn't have pd messaging, but the CVS does.  the texture data will be kept
if the memory addresses haven't changed.  does spigot do anything odd with the
pointers?  i suppose there could be a 'rebind' function and corresponding
message to pix_texture, but that seems like a hack.  

cgc

> Thanks
> ben