[cairo] Alpha problems at some resolutions

[M Joonas Pihlaja]

Hi John,

On Fri, 20 Jun 2008, John Perkins wrote:

> I found that clearing the image prior to drawing seems to fix the problem.
>
> What I don't understand is how I have never seen random garbage, it is always this transparent yellow.

Looking at the attached image in gimp shows the ARGB value of the
transparent yellow to be $BAADF00D.  That looks like something
malloc() might initialise memory to in debug builds.

Cheers,

Joonas