[cairo] [bug] painting surface on surface with device offset set results in incomplete paint

[Radek Doulík]

Hi all,

I am painting a surface which I use as a back buffer on another surface
(xlib surface created on X window). The window surface has the device
offset set to nonzero values. When I paint my back buffer surface to it,
it is not painted completely. Looks like a bug to me. I tried to debug
the problem, but got lost pretty soon.

Any idea what might be wrong?

I modified the canvas-demo.c from canvas-demo/X11/ as a simple example
of the problem. I am using the CVS/HEAD of cairo.

Cheers
Radek

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