[cairo] RFC: introduce cairo_surface_get_height() / width()

[Lawrence D'Oliveiro]

On Sat, 9 Jul 2016 12:30:15 +0200, Enrico Weigelt, metux IT consult
wrote:

> On 08.07.2016 17:10, Uli Schlachter wrote:
> 
>> What's the size of an unbounded surface?  
> 
> maybe (-1,-1) ?

Nonsense numbers aren’t very helpful, particularly when negative
coordinates can be perfectly meaningful (even if negative dimensions
are not).