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Re: Emacs Mac port

From: Donald Curtis
Subject: Re: Emacs Mac port
Date: Sat, 1 Dec 2012 08:04:05 -0600

I don't know specifics, but in the home-brew (https://github.com/mxcl/homebrew) 
build script for emacs, there is an option `srgb` which does some color fixes 
in the NS version,

Specifically, in nsterm,

"*col = [NSColor colorWithCalibratedRed: r green: g blue: b alpha: 1.0];",

"*col = [NSColor colorWithDeviceRed: r green: g blue: b alpha: 1.0];"

There is something about the calibrated version that made colors look different 
than in other versions of emacs, specifically X11. Well, I should say, they 
would look different than other programs generating the same color. And you can 
test this in OS X by using "DigitalColor Meter",

1. Set a background color in hex,
2. Use "DigitalColor Meter" to get the color from the window.

And you'll see that the color being generated is *not* the color you specified, 
well, at least it wasn't on Mac, but maybe this is not an issue on NS.  However 
this may be related to some of your struggles with color differences.

Here is the Homebrew bug report:

And here is the corresponding GNU bug report:

I'm definitely more on the side of doing what the user *expects* (which is to 
use colorWithDeviceRed) over what is technically correct (the current way of 
using colorWithCalibratedRed). But it hasn't been an issue for me since I use 
home-brew and just specify the --srgb compile option.


On Nov 27, 2012, at 1:33 PM, chad <address@hidden> wrote:

> On 26 Nov 2012, at 20:32, Jan Djärv <address@hidden> skrev:
>> It would help if you specified the colors used in the screenshot exactly. 
>> Then we could at least compare colors for X11 and Nextstep.
> Ah, good point; just giving the name isn't entirely clear.  I'm using the 
> zenburn theme from:  https://github.com/bbatsov/zenburn-emacs.git
> A bigger comparison shot of the zenburn theme (with rainbow-mode) between the 
> mac port and bzr head this morning is here:
>       http://www.mit.edu/~yandros/emacs-mac-ns-ports.png
> Thanks!
> ~Chad

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