[cairo] How to free the memory allocated by cairo_image_surface_create_for_png?

[Owen Taylor]

On Tue, 2005-04-05 at 09:52 -0400, Owen Taylor wrote:
> On Tue, 2005-04-05 at 15:02 +0800, Charles Wang wrote:
> > Hi Carl:
> > 
> > Thanks for you quickly reply, got your idea. :)
> > 
> > I think you let me to do the following things:
> > d = malloc(...);
> > sr = cairo_image_surface_create_for_data(d, CAIRO_FORMAT_XXX, w, h,
> > stride);
> > cairo_surface_set_user_data(sr, "IMG", d, free);
> > 
> > It should be complex than just call
> > 'caior_image_surface_assume_ownershipt_of_data' and might encounter key
> > conflict problem, The prototype of user data destroy callback must also
> > compatible with 'free' in libc, otherwise we have to define a callback
> > for this common simple position.
> 
> (cairo_destroy_func_t)free will always work.  No cast is necessary.
                                                   ^^^^

Errr, callback, that is.
						Owen


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