[PATCH 2/2] Move the EDID parsing to its own file

[Bill Spitzak]

The Y of the primaries can be used as alternative method of specifying 
the whitepoint. (convert the 3 Yxy colors to XYZ, add them, then convert 
back to Yxy and the xy is the whitepoint, I think).

I think the reason rgb sets are specfied as 4 pairs of xy (the three 
primaries and the whitepoint) instead of 3 triples is to remove the 
arbitrary multiplier that makes there be 9 numbers instead of 8.

Richard Hughes wrote:
> On 4 May 2013 00:16, Kai-Uwe Behrmann <ku.b at gmx.de> wrote:
>>> +struct weston_edid_color_Yxy {
>>> +       double Y;
>>> +       double x;
>>> +       double y;
>>> +};
>> Why is the Y value set when it is all about primaries. No one will ever use
>> that other than for assuming 1.0 .
> 
> I assumed a standard type would be more useful than a custom type. If
> it stays as Yxy, then colord can use it without having to do a:
> 
> var2->Y = 1.0;
> var2->x = var1->x;
> var2->y = var1->y;
> 
> ...every time.
> 
> Richard
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