[cairo] How to clear a surface ?

[Gerdus van Zyl]

Take a look at http://www.cairographics.org/FAQ/#clear_a_surface.
Basically use cairo_set_operator(ctx,CAIRO_OPERATOR_CLEAR) and then
cairo_paint.

~Gerdus

On Tue, Jul 8, 2008 at 10:57 PM, minh thu <noteed at gmail.com> wrote:
> Hi,
>
> I'm new to cairo and this list. I've a little question.
>
> I'd like to know how I can clear a surface. The result should not
> simply be white, black or pink but fully transparent, just as when the
> surface is initially created.
>
> I'd like to do that because I copy the cairo data to an OpenGL texture and want
> the resulting textured quad be transparent, and because I animate/update
> the texture.
>
> Thank you,
> Vo Minh Thu
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