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ecore_x - vsync ... this handles time going backwards 

yes - time went backwards. we get time from the device driver and
vsync events... this is so incredibly wrong ... it should not have
ever happened... but it did and that caused all sorts of bad things to
happen to animators. this guards against that and tries to get the
system clock time and if that doesnt work it just takes last time +
0.901.

@fix
This commit is contained in:
Carsten Haitzler 2021-02-03 00:43:20 +00:00
parent 9890c2b135
commit 4013c98af1
1 changed files with 11 additions and 3 deletions
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14
src/lib/ecore_x/ecore_x_vsync.c
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@ -290,7 +290,16 @@ _drm_send_time(double t)
{
if (threaded_vsync)
{
static double t_last = 0.0;
double *tim = malloc(sizeof(*tim));
// you won't believe this
if (t <= t_last)
{
fprintf(stderr, "EEEEEEK! time went backwards! %1.5f -> %1.5f\n", t_last, t);
t = ecore_time_get();
if (t <= t_last) t = t_last + 0.001;
}
if (tim)
{
*tim = t;
@ -301,7 +310,6 @@ _drm_send_time(double t)
// this is and this varies... so for now this will do.a
if (_ecore_x_vsync_animator_tick_delay > 0.0)
{
static double t_last = 0.0;
static double t_delta_hist[10] = { 0.0 };
double t_delta = t - t_last;
double t_delta_min = 0.0;
@ -325,8 +333,7 @@ _drm_send_time(double t)
// if w'ere sleeping too long - don't sleep at all.
if (t_sleep > (1.0 / 20.0)) t_sleep = 0.0;
}
usleep(t_sleep * 1000000.0);
t_last = t;
if (t_sleep > 0.0) usleep(t_sleep * 1000000.0);
}
D(" @%1.5f ... send %1.8f\n", ecore_time_get(), t);
eina_spinlock_take(&tick_queue_lock);
@ -334,6 +341,7 @@ _drm_send_time(double t)
eina_spinlock_release(&tick_queue_lock);
ecore_thread_feedback(drm_thread, tim);
}
t_last = t;
}
else
{