Perl-fu - transparent colour

[Gunjan Kapoor]

Hi,
Could someone help me out with this. I need to specify a transparent
colour for the entire image. Is that possible with Perl-fu. e.g: specify
white as the transparent colour.
Additionally, I need to make the background transparent for a
programmatically generated image. The image contains only one drawable.
I've tried adding an alpha channel programmatically but perhaps did not
know the proper procedure and the desired results were not achieved.
TIA
Gunjan

Re: Perl-fu - transparent colour

[Marc Lehmann]

On Wed, May 31, 2000 at 03:48:14PM +0530, Gunjan Kapoor [EMAIL PROTECTED] wrote:
 colour for the entire image. Is that possible with Perl-fu. e.g: specify
 white as the transparent colour.

What do you want to do? Do you want to replace white by transparency? This
is easy (not only in perl-fu, btw), just use plug_in_colortoalpha, e.g.:

$layer-colortoalpha(WHITE);

If you just want to replace a specific colour index (e.g. in an indexed
image) you can also use select_by_color and selection_clear.

 I've tried adding an alpha channel programmatically but perhaps did not
 know the proper procedure and the desired results were not achieved.

This usually suffices: "$layer-add_alpha".

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