Re: Identifying the face between STRETCH and right fringe.

[Robert Pluim]

Eli Zaretskii <address@hidden> writes:

>> From: Robert Pluim <address@hidden>
>> >> > So where does the RGBA value in FRAME_BACKGROUND_PIXEL come from?
>> >
>> > Can you answer this question?
>> 
>> Itʼs set by the NS version of x_set_background_color, so itʼs correct,
>> just not the same format as the face background colour.
>
> So they call ns_lisp_to_color once and store the result?

Well, they allocate an entry in the frame color_table, store the
result of ns_lisp_to_color there, and then use an index into the table
from there on. And convert it to RGBA and store it in
FRAME_BACKGROUND_PIXEL.

> I still wonder why they don't do this with other face colors.  Is
> ns_lisp_to_color expensive or something?

Donʼt do what with other face colours? As far as I can tell the same
thing is done for the foreground (and ns_lisp_to_color does look
expensive, as it parses colour names and RGB specs and probably more).

Robert