GIF89A and PIL
gagsl-py2 at yahoo.com.ar
Tue Mar 30 06:00:16 CEST 2010
En Mon, 29 Mar 2010 04:41:23 -0300, Gregory Ewing
<greg.ewing at canterbury.ac.nz> escribió:
> Stephen Hansen wrote:
>> So I wonder if there's just some hyper-optimization Photoshop does that
>> PIL can't round-trip.
> You may find that PIL isn't bothering to compress at all,
> or only doing it in a very simpleminded way.
Fredrik Lundh, in
"When writing GIF files, PIL uses a simpleminded encoding that, by some
odd reason, LZW decoders have no trouble reading. To write compressed
GIF files, there are a number of options:
-- install NETPBM, and hack GifImagePlugin so it uses _save_ppm instead
of _save (just remove "_ppm" from the latter).
-- write an _imaging_gif module that takes a PIL image and writes
a GIF version of it. how you implement that is up to you..."
After twelve years the above comments are still applicable.
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