[Freeciv-Dev] Re: [FreeCiv-Cvs] jdorje: Replace XPM files in misc/ and trident/ with...

[Jason Dorje Short <vze49r5w@xxxxxxxxxxx>]

Vasco Alexandre Da Silva Costa wrote:
> On Wed, 6 Nov 2002, Jason Dorje Short wrote:
> > We still need to convert the isotrident files to PNGs.  Since these will
> > never (in the forseeable future) be used with the XAW client, we don't
> > need to make them paletted PNGs.  So I could just run 'convert' over
> > them.  Or is there a better conversion mechanism?
>
> It is still a good idea to make them paletted PNGs because:
> a) the tiles use less than 256 colours.
> b) paletted PNGs are much smaller.
>
> You may either use the GIMP or a tool like pngquant on a regular 24-bit
> PNG to achieve this.
Are there any disadvantages to useing a paletted PNG?  Are they slower 
to load, for instance?
pngquant does not always give good results.  For instance, "pngquant 256 
nuke.png" gives me a nuke with a black (not transparent) background.  I 
don't know why.
What is the process to do the conversion with the GIMP?  I can have it 
"generate an optimal palette" with 256 colors.  Should there still be no 
dithering?  What does dithering mean, in this context?
jason