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ecore_evas_drm: Tick from the animator registration callback 

If we're not ticking already when a new animator is started then we have
to wait for a vblank to get a tick.  That's not great.

If we can, use the time of the last vblank to generate an immediate tick
to avoid this latency.
This commit is contained in:
Derek Foreman 2017-08-11 17:02:23 -05:00
parent e893d7de7d
commit cb57ea7587
1 changed files with 36 additions and 1 deletions
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37
src/modules/ecore_evas/engines/drm/ecore_evas_drm.c
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@ -54,6 +54,7 @@ typedef struct _Ecore_Evas_Engine_Drm_Data
int depth, bpp;
unsigned int format;
double offset;
double tick_job_timestamp;
Ecore_Drm2_Context ctx;
Ecore_Fd_Handler *hdlr;
Ecore_Drm2_Device *dev;
@ -61,6 +62,7 @@ typedef struct _Ecore_Evas_Engine_Drm_Data
Evas_Device *seat;
Eina_Bool ticking : 1;
Eina_Bool once : 1;
Ecore_Job *tick_job;
} Ecore_Evas_Engine_Drm_Data;
static int _drm_init_count = 0;
@ -630,6 +632,18 @@ _drm_evas_changed(Ecore_Evas *ee, Eina_Bool changed)
ecore_drm2_fb_flip(NULL, edata->output);
}
static void
_tick_job(void *data)
{
Ecore_Evas_Engine_Drm_Data *edata;
Ecore_Evas *ee;
ee = data;
edata = ee->engine.data;
edata->tick_job = NULL;
ecore_evas_animator_tick(ee, NULL, edata->tick_job_timestamp);
}
static void
_drm_animator_register(Ecore_Evas *ee)
{
@ -642,7 +656,6 @@ _drm_animator_register(Ecore_Evas *ee)
ERR("Attempt to schedule tick for manually rendered canvas");
edata = ee->engine.data;
edata->ticking = EINA_TRUE;
/* Some graphics stacks appear to lie about their clock sources
* so attempt to measure the difference between our clock and the
@ -670,8 +683,24 @@ _drm_animator_register(Ecore_Evas *ee)
}
}
if (edata->tick_job) ERR("Double animator register");
else
if (!edata->ticking &&
!(ecore_drm2_output_pending_get(edata->output) || ee->in_async_render))
{
r = ecore_drm2_output_blanktime_get(edata->output, 0, &sec, &usec);
if (r)
{
edata->tick_job_timestamp = (double)sec
+ ((double)usec / 1000000);
edata->tick_job = ecore_job_add(_tick_job, ee);
}
}
if (!ecore_drm2_output_pending_get(edata->output) && !ee->in_async_render)
ecore_drm2_fb_flip(NULL, edata->output);
edata->ticking = EINA_TRUE;
}
static void
@ -681,6 +710,12 @@ _drm_animator_unregister(Ecore_Evas *ee)
edata = ee->engine.data;
edata->ticking = EINA_FALSE;
if (edata->tick_job)
{
ERR("Animator unregister before first tick");
ecore_job_del(edata->tick_job);
edata->tick_job = NULL;
}
}
static double