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bug#4759: 23.1; Minor Visual Corruption ("Flyspecks") on 23.1/OSX
From: |
Tom Feist |
Subject: |
bug#4759: 23.1; Minor Visual Corruption ("Flyspecks") on 23.1/OSX |
Date: |
Mon, 19 Oct 2009 15:37:51 +0100 |
When scrolling (either via wheel or cursor keys / C-n+p) under certain
conditions the buffer view will become corrupted with tiny 'flyspecks'
which
appear to be parts of the buffer text which have been incorrectly over-
drawn.
(That is, they typically share the same colours as the font-locked
text which
"created" them moves across the screen.)
They remain in position fixed relative to the buffer (They do not move
with the
text as it scrolls) until either a buffer switch or C-l redraws the
screen.
They may also be eliminated if a portion of text scrolls over them and
is
correctly over-drawn.
A sample of the corruption can be seen at
<url:http://metavore.org/faff/emacs-flyspecks.png> along the left-hand
margin,
approx 7 chars in.
Finally, their occurrence frequency seems to be related to the
specific face font. They
occur occasionally with the default (Apple-Monaco-13) font, but are
far more
prevalent with the Anonymous_Pro font (available from
<url:http://www.ms-studio.com/FontSales/anonymouspro.html>).
As yet I have not found a font which does not cause them, merely
alters their
relative frequency of occurrence.
Further testing indicates that the problem may be related to anti-
aliasing of the fonts.
Setting `ns-antialias-text' to nil eliminates the glitches, but at the
cost of incredibly ugly
fonts, and so isn't really a suitable fix.
Thanks,
Tom Feist.
In GNU Emacs 23.1.1 (i386-apple-darwin9.8.0, NS apple-appkit-949.54)
of 2009-08-16 on black.local
Windowing system distributor `Apple', version 10.3.949
configured using `configure '--with-ns''
Important settings:
value of $LC_ALL: nil
value of $LC_COLLATE: nil
value of $LC_CTYPE: nil
value of $LC_MESSAGES: nil
value of $LC_MONETARY: nil
value of $LC_NUMERIC: nil
value of $LC_TIME: nil
value of $LANG: nil
value of $XMODIFIERS: nil
locale-coding-system: nil
default-enable-multibyte-characters: t
Major mode: Emacs-Lisp
Minor modes in effect:
shell-dirtrack-mode: t
eldoc-mode: t
cua-mode: t
global-auto-complete-mode: t
auto-complete-mode: t
global-auto-revert-mode: t
yas/global-mode: t
yas/minor-mode: t
diff-auto-refine-mode: t
show-paren-mode: t
tooltip-mode: t
mouse-wheel-mode: t
menu-bar-mode: t
file-name-shadow-mode: t
global-font-lock-mode: t
font-lock-mode: t
global-auto-composition-mode: t
auto-composition-mode: t
auto-encryption-mode: t
auto-compression-mode: t
size-indication-mode: t
column-number-mode: t
line-number-mode: t
transient-mark-mode: t
Recent input:
C-x C-f C-g M-x v e r s i o n <return> C-x C-f . e
m a c s <return> <wheel-down> <double-wheel-down> <triple-wheel-down>
<triple-wheel-down> <triple-wheel-down> <triple-wheel-down>
<triple-wheel-down> <triple-wheel-down> <triple-wheel-down>
<wheel-up> <double-wheel-up> <triple-wheel-up> <triple-wheel-up>
<triple-wheel-up> <triple-wheel-up> <wheel-down> M-x
e m a c s - b u g <return>
Recent messages:
For information about GNU Emacs and the GNU system, type C-h C-a.
Loading tramp...done
Quit
GNU Emacs 23.1.1 (i386-apple-darwin9.8.0, NS apple-appkit-949.54) of
2009-08-16 on black.local
OVERVIEW
Starting new Ispell process [en] ...
Restoring clock data
Loading /Users/tomfeist/.emacs.d/org-clock-save.el (source)...done
Loading vc-svn...done
call-interactively: Text is read-only
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Tom Feist <=