Kurt Yoder wrote:

I just recently started using Gimp 2.0 on X11/Mac OS X. Now I've hit a snag; perhaps someone here can offer a pointer?

I opened a gif in gimp and am trying to do gaussian blur on it. However, all my filters are greyed out. Am I missing something obvious?

Not much works on indexed color images (and all GIF files are indexed color, it's a limitation of the format).

Hit 'Image/Mode/RGB' in the menu to convert it.

(Possibly coincidental: while looking into this problem and attempting to duplicate/move layers, I came upon a dialog saying the gif has no alpha channel)

You shouldn't normally have to do this, but for reference if you do: when there's a background layer where transparency doesn't work, right-click (command-click if you have a one button mouse) on the layer in the layers dialog and hit 'add alpha channel'.

-- brion vibber (brion @ pobox.com)

Change it from an indexed image to an RGB image.

On the tool bar: Image > Mode > RGB

You can also add an alpha channel. In the Layers dialogue, Right Click the layer and choose Add Alpha Channel.

When you're finished you can flatten the image again and convert back to indexed.

Matt

At 09:58 PM 7/14/04 -0400, Kurt Yoder wrote:

Hi list

I just recently started using Gimp 2.0 on X11/Mac OS X. Now I've hit a snag; perhaps someone here can offer a pointer?

I opened a gif in gimp and am trying to do gaussian blur on it. However, all my filters are greyed out. Am I missing something obvious?

(Possibly coincidental: while looking into this problem and attempting to duplicate/move layers, I came upon a dialog saying the gif has no alpha channel)

Thanks for any assistance...