[Openicc] Oyranos - proof of concept

[Graeme Gill]

Chris Murphy wrote:
> In the meantime, what I'm really enamored with are the Eizo flat panel 
> displays that allow calibration to be done in their internal 10-bit to 
> 14-bit DAC LUT, which is in the display itself. The video card LUT 
> remains linear, and the higher bit depth of the curve applied in the 
> display itself translates into far smoother gradients. Thus far I'm 
> finding I prefer matrix profiles for these displays, but they are quite 
> well behaved once calibrated this way.

In principle this can be done with any current display running via
the (analogue) VGA output. I would expect that any modern VGA
card is using better than 8 bit RAMDACSs, and certainly the
hooks are there is some OS's to set more than 8 bit data
into them (MS Win2k for sure, X11, but I'm not sure where OSX is
up to. Last time I checked they only had an 8 bit interface to the RAMDACs.)

Unfortunately for LCD displays, the DVI standard is only 8 bits,
so any higher precession output has to be done inside the display
somehow. None of the DDC stuff I've come across indicates that
that there is any standard way of doing this.

Graeme Gill.