virtual device depths

[Caolán McNamara]

On Thu, 2015-11-19 at 14:40 +0100, Miklos Vajna wrote:
> The border around sw pages is a semi-transparent shadow. In the 
> desktop case we have this grayish document background

> If some change needs testing to see if it breaks this transparency
> scenario, I think the easiest is to set the background in 
> gtktiledviewer to some non-gray color, then it's easy to see what 
> breaks if we would go back to 1-bit transparency.

Right, now I get it and can see what I'm missing. I can replace it with
a "default" depth mask and retain the shadow effect there. That works
for me locally.

C.