On Sat, Feb 5, 2011 at 3:44 PM, Mathieu Bouchard <ma...@artengine.ca> wrote:
> On Tue, 25 Jan 2011, Rich E wrote: > > Ah, understood. Thanks for the nice code explanation and references... >> they both really help. >> I noticed that t_canvasenvironment remains privately defined, so it's >> difficult to use this struct. To get the dollarzero, I saw this works: >> >> canvas_setcurrent(x_canvas); >> int dzero = canvas_getdollarzero(); >> > > That's an alias of pd_pushsym. > You are supposed to use it with canvas_unsetcurrent (alias of pd_popsym), > though I don't remember what can really go wrong if you don't unset/pop. > > Lots of stuff goes wrong if you don't call canvas_unsetcurrent after setting it. :) I know because I was running into all sorts of EXC_BAD_ACCESS signals before doing it - specifically in some experiments in opening patches via x_canvas points. Thanks for the tip, Mathieu. I actually got a couple other questions now that I have figured out a bit more, but I'll save it for another thread.. Cheers, Rich
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