bug#1867: Resizing window causes text flickering when using antialiased font on X

[Jan Djärv]

Hello.

5 okt 2011 kl. 22:29 skrev Eli Zaretskii <eliz@gnu.org>:

>> Date: Wed, 05 Oct 2011 19:34:45 +0200
>> From: Jan Djärv <jan.h.d@swipnet.se>
>> CC: rgm@gnu.org, lbsmtp@gmail.com, 1867@debbugs.gnu.org
>> 
>>> So even when antialiased fonts are used, I wouldn't expect any
>>> flickering, because Emacs should notice that the window didn't change
>>> at all.  Unless, that is, redrawing the cursor on X involves redrawing
>>> parts of the window text.  Does it?
>> 
>> Yes, but just the character under the cursor.
> 
> And could redrawing a single character under the cursor cause
> flickering with antialiased fonts?

For that character it might happen if the clearing and writing is separated 
long enough in time. Depends on the speed of your machine. 

    Jan D.