Re: [Tuxpaint-stamps] Reducing size of Tux Paint stamp files by optimising PNG files

[Karl O. H. <ka...@hu...>]

la. den 16. 03. 2013 klokka 20.16 (+0100) skreiv Pere Pujal i
Carabantes:
> > I think this is a worthwhile saving, and recommend using the
> > optimised PNG files. I have commit access to the CVS repository, so 
> > if I get the go-ahead, I can commit the files.
> > 
> 
> If the transparent part of the images is not afected(not blanqued out
> to white or black), then it is OK for me too.
> A couple of files with worked transparent stuff that should not be
> lost are the two fireman*png in the people directory, there are
> others.

The transparency part is not affected, in that each pixel will still be
rendered identically. However, the procedure *does* clean the RGB part
of *fully* transparent pixels. I don’t think will be a problem. (For the
fireman images, these pixels only contain garbage.)

One can actually obtain even better compression ratios by optimising the
RGB content of fully transparent pixels, but I chose not to do this.

-- 
Karl Ove Hufthammer
http://huftis.org/
Jabber: ka...@hu...