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Don't delay update when refresh rate is not available 

Fix a divide by zero in delay time calculation.

Fixes #56
This commit is contained in:
Yuxuan Shui 2018-11-26 16:53:57 +00:00
parent 7d990fef88
commit 010a0c34ca
1 changed files with 5 additions and 3 deletions
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8
src/compton.c
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@ -3173,9 +3173,8 @@ ev_screen_change_notify(session_t *ps,
if (ps->o.sw_opti && !ps->o.refresh_rate) { if (ps->o.sw_opti && !ps->o.refresh_rate) {
update_refresh_rate(ps); update_refresh_rate(ps);
if (!ps->refresh_rate) { if (!ps->refresh_rate) {
fprintf(stderr, "ev_screen_change_notify(): Refresh rate detection " fprintf(stderr, "ev_screen_change_notify(): Refresh rate detection failed."
"failed, --sw-opti disabled."); "swopti will be temporarily disabled");
ps->o.sw_opti = false;
} }
} }
} }
@ -4413,6 +4412,9 @@ swopti_init(session_t *ps) {
*/ */
static double static double
swopti_handle_timeout(session_t *ps) { swopti_handle_timeout(session_t *ps) {
if (!ps->refresh_intv)
return 0;
// Get the microsecond offset of the time when the we reach the timeout // Get the microsecond offset of the time when the we reach the timeout
// I don't think a 32-bit long could overflow here. // I don't think a 32-bit long could overflow here.
long offset = (get_time_timeval().tv_usec - ps->paint_tm_offset) % ps->refresh_intv; long offset = (get_time_timeval().tv_usec - ps->paint_tm_offset) % ps->refresh_intv;