Re: [GD-DEVEL] Transparency Optimization in gd_gif_out.c

Hi David,

On Jan 6, 2008 11:11 PM, David Reiss <[email protected]> wrote:
> Sure.  I've attached anim.c, which is just a main function wrapped
> around the example in the documentation for gdImageGifAnimAddCtx,
> anim-old.gif, which is the output of anim.c linked with the stock
> version of libgd, and anim-new.gif, which is the output of anim.c
> linked with the break statement commented out.  The two images look
> identical in Firefox, but if you open them up in GIMP, you can see
> that the second and third frames of anim-old.gif only have one
> transparent pixel per horizontal line, while anim-new.gif looks
> correct.

Did you not invert new and old? I see the one pixel per line but in
new not in old.

If yes, then there is a bug, the frame optimization did not work
(since years :). It should actually be transparent for the white areas
that do not change since the last frame.

Can you open a bug in http://bugs.libgd.org please? It will be easier
to comment and follow the changes.

Cheers,
-- 
Pierre
http://blog.thepimp.net | http://www.libgd.org