Base class for u16 color models?

[Boudewijn Rempt]

I'm working on a 16/bit integer XYZ colorspace (for the default operations 
that are now implemented with conversion to and from qcolor), and I noticed 
that the colorspace_rgb_u16 has a number of methods that are likely to be 
useful for any 16/bit integer colorspace. Would it be a good idea to make 
something like the following hierarchy


KisStrategyColorSpace (which should be renamed to KisAbstractColorspace)
	|
	+- KisRRGColorspace
	+- KisCMYKColorspace
	+- KisGrayColorspace
	+- KisAlphaColorspace
	+
	\- KisU16Colorspace
		|
		+- KisRGBU16Colorspace
		+- KisCMYKU16Colorspace
		+- KisGray16Colorspace
		+
	
		
And so on... And of course, the same for the 32bit float & integer colorspace
once Adrian has those done. I like the prolog & epilog composite macros in the 
16 bit rgb a lot, by the way :-) -- but maybe we can move the bitBlt
with the switch that actually does calls the composition routines into 
KisStrategyColorSpace?

The idea with XYZ is, by the way, to have as accurate a default implemenation 
as possible, but one that is slow enough to stimulate us to provide optimized 
implementations in the individual colorspaces :-)
	
-- 
Boudewijn Rempt 
http://www.valdyas.org/fading/index.cgi
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