Initialize Layer Mask to: Channel drop-down box is grayed out.

[Andrew]

Binary package hint: gimp

In the 'Add Layer Mask' dialog box, the drop-down box for selecting which channel to use is grayed out. If I choose the 'Channel' option and click the 'Add' button anyway, I get the message "Please select a channel first."

GIMP 2.6.1, Ubuntu 8.10

[Sven Neumann (sven-gimp)]

Works correctly for me. If your image does have any channels the size of your layer, then the combo-box lists them and it is not grayed-out. Does your image have any channels (saved selections) at all?

[Andrew (andrewkvalheim)]

Four channels are listed in the Channels dialog: Red, Green, Blue, and Alpha. I would like to initialize a layer mask to the Red channel. Even when layer is the same size as the entire image, no channels are listed in the drop-down box.

If I make a saved selection, it is listed in the drop-down box, but the other four channels still are not.

Gimp 2.6.6-0ubuntu1

[Pedro Villavicencio (pedro)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. Is this reproducible with Ubuntu 9.10 the Karmic Koala? Please test and provide us of feedback about it, Thanks in advance..

[Launchpad Janitor (janitor)]

[Expired for gimp (Ubuntu) because there has been no activity for 60 days.]

[Andrew (andrewkvalheim)]

It looks like this is the intended, though unintuitive behavior. If I right-click on the 'Red' channel and choose 'Duplicate Channel', it creates a fifth channel named 'Red Channel Copy' which does get listed in the 'Add Layer Mask' window.

My understanding now is that the 'Red' channel is not actually a channel, despite being called one.