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Disable extended frame synchronization by default

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* doc/emacs/xresources.texi (Table of Resources): Document
new possible value of `synchronizeResize'.
* src/xfns.c (Fx_create_frame): Set synchronization protocol
according to `synchronizeResize'.
This commit is contained in:
Po Lu 2022-02-06 19:51:05 +08:00
parent 30c6074d5a
commit 3775156990
2 changed files with 21 additions and 6 deletions
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5
doc/emacs/xresources.texi
View file

@ -379,7 +379,10 @@ manager when it has finished redrawing the display in response to a
request to resize a frame. Otherwise, the window manager will
postpone drawing a frame that was just resized until its contents are
updated, which prevents blank areas of a frame that have not yet been
painted from being displayed.
painted from being displayed. If set to @samp{extended}, it will
enable use of extended frame synchronization, which might be supported
by some compositing window managers which don't support basic
synchronization.
@item @code{verticalScrollBars} (class @code{ScrollBars})
Give frames scroll bars on the left if @samp{left}, on the right if

22
src/xfns.c
View file

@ -4815,15 +4815,25 @@ This function is an internal primitive--use `make-frame' instead. */)
XSyncValue initial_value;
XSyncCounter counters[2];
AUTO_STRING (synchronizeResize, "synchronizeResize");
AUTO_STRING (SynchronizeResize, "SynchronizeResize");
Lisp_Object value = gui_display_get_resource (dpyinfo,
synchronizeResize,
SynchronizeResize,
Qnil, Qnil);
XSyncIntToValue (&initial_value, 0);
counters[0]
= FRAME_X_BASIC_COUNTER (f)
= XSyncCreateCounter (FRAME_X_DISPLAY (f),
initial_value);
counters[1]
= FRAME_X_EXTENDED_COUNTER (f)
= XSyncCreateCounter (FRAME_X_DISPLAY (f),
initial_value);
if (STRINGP (value) && !strcmp (SSDATA (value), "extended"))
counters[1]
= FRAME_X_EXTENDED_COUNTER (f)
= XSyncCreateCounter (FRAME_X_DISPLAY (f),
initial_value);
FRAME_X_OUTPUT (f)->current_extended_counter_value
= initial_value;
@ -4831,7 +4841,9 @@ This function is an internal primitive--use `make-frame' instead. */)
XChangeProperty (FRAME_X_DISPLAY (f), FRAME_OUTER_WINDOW (f),
dpyinfo->Xatom_net_wm_sync_request_counter,
XA_CARDINAL, 32, PropModeReplace,
(unsigned char *) &counters, 2);
(unsigned char *) &counters,
((STRINGP (value)
&& !strcmp (SSDATA (value), "extended")) ? 2 : 1));
#endif
}
#endif