[cairo] Can I tell if cairo_image_surface_create_with_data() was called?

[Behdad Esfahbod]

Bill Spitzak wrote:
> Is there a way to tell if a cairo_surface_t was created with 
> cairo_image_surface_create_with_data() as opposed to 
> cairo_image_surface_create()? Basically I want to know whether it owns 
> the data.
> 
> It must know this because the destructor needs to know it so it can free 
> the data.

You can schedule a free using the user_data mechanism.

behdad

> This call would be somewhat useful and it would keep with the idea of 
> being able to query all the arguments passed to constructors for all 
> Cairo objects.