Re: [Haskell-cafe] ANN: AC-Vector, AC-Colour and AC-EasyRaster-GTK

On Jul 4, 2009, at 15:01 , Max Rabkin wrote:

On Sat, Jul 4, 2009 at 8:38 PM, Andrew Coppin wrote:

...

3. It doesn't appear to provide arithmetic over colours.

It provides darken, blend and addition (though addition is called mappend rather than (+)). signum, abs and fromInteger don't make a huge amount of sense for colours.

I don't see a good meaning for signum offhand, but fromInteger could take an X11-encoded RGB value and abs could produce grayscale brightness. -- brandon s. allbery [solaris,freebsd,perl,pugs,haskell] allbery@kf8nh.com system administrator [openafs,heimdal,too many hats] allbery@ece.cmu.edu electrical and computer engineering, carnegie mellon university KF8NH