On Sat, Feb 25, 2006 at 07:58:35PM +0100, RalfGesellensetter wrote:
> Hello all,
> 
> for several times I managed to create animations witb Gimp 2.2. 
> Especially nice are web animations (GIF) which are easily done with 
> GIMP.
> 
> Now, for the first time, GIMP's outcome is different from what I expect. 
> Is it a feature or a bug that partly transparent layers are not shown 
> in the animation preview box? I put an example to 
> 
> http://www.skolelinux.de/~ralf/artwork/animations/
> 
forgive me, i have not looked at the animation yet.  even without
looking (however) i can tell you that gif is either completely
transparent or completely painted.  there is no inbetween, unless you
are one of those people who has purchased or obtained the propietary gif
libraries which use (i think) something that i can only imagine to be a
layered color set up.  

the gifs that average users like you (maybe) and me have one 256 color
palette.  one of the color positions can be used for transparency
leaving 255 colors and 1 no color.  the industry gif has 256 of those
palettes to work with and can show various amounts of transparency.

btw, 256x256 is something close to 16 million, which is the number of
colors that a jpeg uses.  jpeg however does not know transparency.

so there you go.  it is not gimp that cannot make your animation
transparent, it is the library they allow you to have and for your
software to use to make and view gif with.

mng works.  i am certain that one day a browser will be made that can
display mng.  especially if we can make a community of interested people
who want to deliver free software to actual users.  until such a
software project exists, you can search the bug reports of the different
browser projects to see what has happened there.

carol

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