8bit PNG & multi Alpha
Dominik Eichelberg
is it possible to create with GIMP an 8-bit (color mapped) PNG file
containig more than one alpha
color (as it is used in the GIF forma)?
GIMP always reduces the alpha channel to a binary alpha information,
when I'm changing to indexed
colors.
dominik
Nick Lamb
>hi,
>is it possible to create with GIMP an 8-bit (color mapped) PNG file
>containig more than one alpha
>color (as it is used in the GIF forma)?
Well, I don't completely understand your English, I'm afraid. But I
am probably best qualified to answer as I'm the de facto PNG
plug-in maintainer.
Do you mean "GIF can only do one bit alpha, but PNG can do better,
can I use that feature in Gimp?"
If so, I'm afraid that the answer is no so far. Some future version
of Gimp will let you save an RGB image as colormap PNG, and do the
nice conversion on the fly so that everything looks lovely.
Of course, full alpha is supported for RGBA images, but they are I
think a lot bigger, and thus not always suitable.
For now you will need a third party tool, perhaps Image Magick can
do this? :(
>GIMP always reduces the alpha channel to a binary alpha information,
>when I'm changing to indexed colors.
Yes, this is a noted Gimp mis-feature. It's possible that a future
Gimp (after 1.2 is stable and released) will remove INDEXED mode
altogether, and convert images only when they are saved, that would
"fix" this problem I think.
>dominik
Dominik Eichelberg
Nick Lamb wrote:
Thanks a lot, you answered all my questions.
I'm sorry for my english, I would prefer to write in German or C++,
the only languages I know perfectly, but they are not understandable for
everyone!
dominik
Pixel Fairy
>
>Thanks a lot, you answered all my questions.
>I'm sorry for my english, I would prefer to write in German or C++,
>the only languages I know perfectly, but they are not understandable for
>everyone!
i think c is as close to a universal language as we can get around here...