When using a metacity theme with rounded corners, corners are not transparent

[Christoph Langner]

When you use a metacity theme with rounded corners and you make a screenshot of a window, the corners are not transparent. You can see e.g. your desktop background instead of a transparent area. Compare the behaviour with the gnome screenshot tool. It doesn't matter if you use compiz or metacity as window manager.

[Mario Kemper (Romario) (mario-kemper)]

I'll have a look, thanks for your bug report.

[Mario Kemper (Romario) (mario-kemper)]

No real solution yet, still working on it...

We surely have to use this module to deal with it:
http://search.cpan.org/~smccam/X11-Protocol-0.56/Protocol/Ext/SHAPE.pm

[Christoph Langner (chrissss)]

I reopen here. I installes shutter 0.7

§ dpkg -l shutter | grep ii
ii shutter 0.70~ppa11

When i make a screenshot of a window (i'm using shiki as my desktop theme here) i see the gray background from my wallpaper but no transparency.

[Christoph Langner (chrissss)]

A Screenshot to explain this better. The marked corner should be transparent.

[Mario Kemper (Romario) (mario-kemper)]

Are you using compiz?

[Christoph Langner (chrissss)]

> Are you using compiz?

I tried metacity and compiz. It doesn't make a difference.

[Mario Kemper (Romario) (mario-kemper)]

And you are using png as filetype?

[Christoph Langner (chrissss)]

Yes.

[Vadim Peretokin (vperetokin)]

It does happen sometimes here but I can't find a reproducible way yet

[Vadim Peretokin (vperetokin)]

found another case, see top-left on this one:

http://www.ubuntu-pics.de/bild/10613/screenshot_100_508__2o3qVg.png

(stats a different site)

[Christoph Langner (chrissss)]

Ah, i think i found the answer. Start metacity before you take a screenshot

$ metacity --replace &
$ shutter

-> Corners are transparent

Switch to metacity AFTER you started shutter

$ compiz --replace &
$ shutter
$ metacity --replace &

-> And you'll get opaque window corners

[Mario Kemper (Romario) (mario-kemper)]

Oh, this is correct.
Shutter initializes the X11 protocol connection on startup. At this point the XSHAPE extension is loaded as well. Maybe we can catch a signal when wm was changed, so we can init X11 again.

[Mario Kemper (Romario) (mario-kemper)]

@Christoph: Do you agree that this would be a valid solution or is anything else not working here?

[Christoph Langner (chrissss)]

@Mario: Yep, that would be a valid solution. For me it's quite important to be able to take screenshots with transparent corners since i have to include them into documentations or reports. But i also like desktop effects while working. So i switch between metacity and compiz to get the transparent corners, but it would be easier not to need restart shutter too :)