Add Alpha Channel to All Layers

Oregonian · **Posted:** Mon May 09, 2011 9:33 am **(#1)**

A request for script writers. Is it possible to write a script to add an alpha channel to all layers that don't have one?

dd · **Joined:** Apr 10, 2011 **Posts:** 532

Yes, I think it would be possible. Not that hard either.

dd · **Joined:** Apr 10, 2011 **Posts:** 532

Code: Select all

def py_add_alpha(img, drawable):
  
  layerlist = img.layers
  
  for l in layerlist:
     if not l.has_alpha:
        pdb.gimp_layer_add_alpha(l)

just needs register, etc.

bkh1914 · **Posted:** Mon May 09, 2011 10:09 am **(#4)**

Or if you prefer a script:

Attachment:

all-layers-add-alpha.scm [1.5 KiB]
Downloaded 2225 times

The script will be found in
Layer > All Layers > Add Alpha to All Layers

dd · **Joined:** Apr 10, 2011 **Posts:** 532

ok, here it is

http://www.fileden.com/files/2010/2/7/2 ... d_alpha.py

damn, fastposted. This one is in filters->alpha to all...

Oregonian · **Posted:** Mon May 09, 2011 10:14 am **(#6)**

Thank you dd. I don't know how to add a register. Will it show up in GIMP as it stands?

dd · **Joined:** Apr 10, 2011 **Posts:** 532

No, but I made a complete plugin for you, here

http://www.fileden.com/files/2010/2/7/2 ... d_alpha.py

Oregonian · **Posted:** Mon May 09, 2011 10:19 am **(#8)**

Thanks dd and bkh1914.

Scripts for Python and non-Python users.

How cool is that?! :bigthup

I'll give them both a try.

Oregonian · **Posted:** Mon May 09, 2011 10:36 am **(#9)**

Both work perfectly.

Dd, I moved yours to "<Image>/Layer/Alpha to all..."

Thank you both very much!

Didn't even have to do a rain dance. Sun is shining here. :hexer

lylejk · **Joined:** Sep 24, 2010 **Posts:** 12780

Had a need for this (about to do a photo collage for Hank Aaron). The python isn't detected but the Script-fu works great and I appreciate it. Still, GIMP is very slow at importing layers and exporting layers (ouch). lol

racer-x · **Joined:** Apr 15, 2017 **Posts:** 1837

No need for this script any more Lyle, just change the default settings to what they should've been all along....

Attachment:

alpha-channel.png [ 110.23 KiB | Viewed 3404 times ]