Re: Getting a pointer to a cairo context?

Hazen Babcock <[email protected]> writes:

> It is possible to get a pointer to a cairo context? I thought that  
> perhaps (gffi::foreign-location cr) would do it, but passing this to  
> the code that expects a pointer to a cairo context seems to crash my  
> (SBCL) Lisp process.

> I hoped that something like this might work:
> 
> (gdk:with-cairo-context (cr (widget-window drawing-area))
>      (multiple-value-bind (width height)
>            (widget-get-size-allocation drawing-area)
>          (cairo:scale cr width height))
>      (draw-a-plot (gffi::foreign-location cr)))

This should be correct as far as i can tell, but I couldn't figure out
how to use cl-plplot with cairo so I wasn't able to do any testing. If
you could provide some example code I could try to reproduce the crash.

-- 
Espen

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