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; Minor fixes of documentation of double-buffering on MS-Windows

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* etc/NEWS: Improve and expand wording of the entry about
double-buffering on MS-Windows.

* src/w32fns.c (w32_set_inhibit_double_buffering): Fix commentary.
This commit is contained in:
Eli Zaretskii 2022-04-30 12:00:33 +03:00
parent e540c8778b
commit 03561b4aad
2 changed files with 14 additions and 6 deletions
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18
etc/NEWS
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@ -2147,11 +2147,19 @@ to preserve the old behavior, apply
** MS-Windows
---
*** Emacs now supports double buffering on MS Windows to reduce flicker.
This leads to a noticable reduction in the amount of graphics flicker
during redisplay on many systems, but can also make painting slower.
If that happens, it can be disabled by setting the
'inhibit-double-buffering' frame parameter.
*** Emacs now supports double-buffering on MS-Windows to reduce display flicker.
(This was supported on Free systems since Emacs 26.1.)
To disable double-buffering (e.g., if it causes display problems), set
the frame parameter 'inhibit-double-buffering' to a non-nil value.
You can do that either by adding
'(inhibit-double-buffering . t)
to 'default-frame-alist', or by modifying the frame parameters of the
selected frame by evaluating
(modify-frame-parameters nil '((inhibit-double-buffering . t)))
+++
*** Emacs now supports system dark mode.

2
src/w32fns.c
View file

@ -1802,7 +1802,7 @@ w32_set_tool_bar_lines (struct frame *f, Lisp_Object value, Lisp_Object oldval)
w32_change_tool_bar_height (f, nlines * FRAME_LINE_HEIGHT (f));
}
/* Enable or disable double buffering on F.
/* Enable or disable double buffering on frame F.
When double buffering is enabled, all drawing happens on a back
buffer (a bitmap), which is then displayed as a single operation