IcyDraw detect palette on import

[0xc1c4da]

IcyDraw appears to build a palette of the imported file based on colours it sees in the import, and it is not possible to select a palette after loading it.

This is problematic when copying art into a new file with an indexed palette (i.e Xterm extended colors) the colours are not mapped correctly due to the indexing, requiring manual re-colouring.

It would be nice to specify the pallette or perhaps have some auto detection logic that maps colours to the nearest neighbour?

[mkrueger]

You've a real file using xterm extended colors? I would be interested in it - I redesign icy draw atm would be an important example for me.

[mkrueger]

I remodeled the color system quite a bit could need test files :) .

[mkrueger]

the old icy draw had some recoloring logic when changing palettes - the 0.6.0 hasn't need to think about how to model that.

But it has a way better apporach of representing palette/extended/rgb colors.