[cairo] Clear Screen command?

[Benjamin Otte]

You want to have a look at cairo_operator_t and the cairo_set_operator()
function.

A clear is easily achieved using CAIRO_OPERATOR_CLEAR and cairo_paint().
Though as someone already pointed out, you likely want to not clear your
screen but instead cairo_paint() the buffer on it using
CAIRO_OPERATOR_SOURCE.

Benjamin


On Fri, 2010-05-28 at 11:47 +0800, Mj Mendoza IV wrote:
> Hello,
> 
> Coming from _BitBlt_ methodology of creating 2D games, what is the
> equivalent of _clear screen_ on Cairo?
> 
> On rastered type of rendering engine, the pseudo code would be:
> 
> while app is running
>   clear screen
>     draw stuff to buffer
>   draw buffer to screen
> end while
> 
> How is this logic applied when using cairo library? Is it safe to
> simply FILL the whole area of  the main context with color black (or
> any color that is)?
> 
> 
> 
> Regards.
> 
> Mj Mendoza IV,
> Developer, KonsolScript
> http://www.konsolscript.org
> 
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