GNU bug report logs - #12612
24.2.50; Frame Background RGB(1,1,1) Darker Than Set Using GTK3

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Message #13 received at 12612-done <at> debbugs.gnu.org (full text, mbox):

From: Jan Djärv <jan.h.d <at> swipnet.se>
To: Stephen Berman <stephen.berman <at> gmx.net>
Cc: 12612-done <at> debbugs.gnu.org, Taylor Venable <tvenable <at> mieweb.com>
Subject: Re: bug#12612: 24.2.50;
	Frame Background RGB(1,1,1) Darker Than Set Using GTK3
Date: Sat, 13 Oct 2012 23:52:45 +0200

Hello.

I think I fixed this, please test it.

Thanks,

	Jan D.

9 okt 2012 kl. 22:18 skrev Stephen Berman <stephen.berman <at> gmx.net>:

> On Tue, 9 Oct 2012 14:11:09 -0400 Taylor Venable <tvenable <at> mieweb.com> wrote:
> 
>> When using GTK3, any time one sets the frame background (e.g. from
>> startup, or using set-frame-parameter) there is a difference between the
>> background color of the part of the frame with text, and the part of the
>> frame without. The part with text is correct, but the part of the frame
>> without is darker by 1 bit in all three RGB attributes. For example, the
>> default background is white; if you take a screenshot and look at the
>> result in the GIMP you will find that space between text is #ffffff,
>> whereas the background after the end of the line or buffer is #fefefe.
>> 
>> Only with GTK3 have I noticed this; with GTK2 this does not occur. 
> 
> I confirm both these observations.
> 
>> happens with -Q. You don't notice it with light (Emacs) themes, but on
>> my monitor I can see it with darker (Emacs) themes fairly easily. When
>> in doubt, you can always check with a screenshot. 
> 
> On my monitor (and with my eyes) I can't tell the difference, but when I
> used a color picker program it showed just what you describe.
> 
>>                                                  The exception is if
>> the background is set to #000000, in which case everything has a
>> background of #000000 as it should.
> 
> I guess that's no exception, since there are no negative RGB values.
> 
>> I have no GTK3 theme set. Thanks for having a look.
> 
> I'm using oxygen-gtk on KDE4.
> 
>> In GNU Emacs 24.2.50.2 (x86_64-unknown-linux-gnu, GTK+ Version 3.4.4)
>> of 2012-10-09 on trantor
>> Bzr revision: monnier <at> iro.umontreal.ca-20121009163751-ui2zwwoaj8bqwj52
> 
> Mine: GNU Emacs 24.2.50.1 (x86_64-suse-linux-gnu, GTK+ Version 3.4.4) of
> 2012-10-03 on rosalinde
> Bzr revision 110349 eggert <at> cs.ucla.edu-20121002193810-gu1indup6lry2cxn
> 
> (Not seen on GNU Emacs 23.3.1 (x86_64-suse-linux-gnu, GTK+ Version
> 2.24.10) of 2012-08-15 on build21.)
> 
> 

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