[cairo] Parameter types of image_surface API

[David Weiß]

Hey,

I'm wondering whether there's any reason for the image_surface API to use signed datatypes for width/height parameters?
I think unsigned int makes more sense.
Also, none of the parameters is defined as const. E.g. and especially for getters like cairo_image_surface_get_width() it's IMHO better style (and semantics) to pass const cairo_surface_t * const instead of just cairo_surface_t *.
Is there a technical reason not to do so?

Blessings,
--
David Weiß

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