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clutter/frame: Add API to query minimal render time of a frame

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It will be used to schedule Wayland frame events independently from both
update and presentation time, as the former may happen multiple times
frame and the later not at all.

For frame events we want a timing that is just late enough to ensure
that a following commit by a Wayland client will not get included into
the current frame any more.

Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2823>
This commit is contained in:
Robert Mader 2023-02-06 11:50:00 +01:00 committed by Marge Bot
parent dddaf19d07
commit ff246a2dc8
4 changed files with 28 additions and 2 deletions
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10
clutter/clutter/clutter-frame-clock.c
View File

@ -79,6 +79,7 @@ struct _ClutterFrameClock
gboolean is_next_presentation_time_valid;
int64_t next_presentation_time_us;
int64_t min_render_time_allowed_us;
/* Buffer must be submitted to KMS and GPU rendering must be finished
* this amount of time before the next presentation time.
@ -466,7 +467,8 @@ clutter_frame_clock_compute_max_render_time_us (ClutterFrameClock *frame_clock)
static void
calculate_next_update_time_us (ClutterFrameClock *frame_clock,
int64_t *out_next_update_time_us,
int64_t *out_next_presentation_time_us)
int64_t *out_next_presentation_time_us,
int64_t *out_min_render_time_allowed_us)
{
int64_t last_presentation_time_us;
int64_t now_us;
@ -489,6 +491,7 @@ calculate_next_update_time_us (ClutterFrameClock *frame_clock,
now_us;
*out_next_presentation_time_us = 0;
*out_min_render_time_allowed_us = 0;
return;
}
@ -613,6 +616,7 @@ calculate_next_update_time_us (ClutterFrameClock *frame_clock,
*out_next_update_time_us = next_update_time_us;
*out_next_presentation_time_us = next_presentation_time_us;
*out_min_render_time_allowed_us = min_render_time_allowed_us;
}
void
@ -704,7 +708,8 @@ clutter_frame_clock_schedule_update (ClutterFrameClock *frame_clock)
case CLUTTER_FRAME_CLOCK_STATE_IDLE:
calculate_next_update_time_us (frame_clock,
&next_update_time_us,
&frame_clock->next_presentation_time_us);
&frame_clock->next_presentation_time_us,
&frame_clock->min_render_time_allowed_us);
frame_clock->is_next_presentation_time_valid =
(frame_clock->next_presentation_time_us != 0);
break;
@ -775,6 +780,7 @@ clutter_frame_clock_dispatch (ClutterFrameClock *frame_clock,
frame->frame_count = frame_count;
frame->has_target_presentation_time = frame_clock->is_next_presentation_time_valid;
frame->target_presentation_time_us = frame_clock->next_presentation_time_us;
frame->min_render_time_allowed_us = frame_clock->min_render_time_allowed_us;
COGL_TRACE_BEGIN (ClutterFrameClockEvents, "Frame Clock (before frame)");
if (iface->before_frame)

1
clutter/clutter/clutter-frame-private.h
View File

@ -31,6 +31,7 @@ struct _ClutterFrame
gboolean has_target_presentation_time;
int64_t target_presentation_time_us;
int64_t min_render_time_allowed_us;
gboolean has_result;
ClutterFrameResult result;

15
clutter/clutter/clutter-frame.c
View File

@ -75,6 +75,21 @@ clutter_frame_get_target_presentation_time (ClutterFrame *frame,
}
}
gboolean
clutter_frame_get_min_render_time_allowed (ClutterFrame *frame,
int64_t *min_render_time_allowed_us)
{
if (frame->has_target_presentation_time)
{
*min_render_time_allowed_us = frame->min_render_time_allowed_us;
return TRUE;
}
else
{
return FALSE;
}
}
ClutterFrameResult
clutter_frame_get_result (ClutterFrame *frame)
{

4
clutter/clutter/clutter-frame.h
View File

@ -44,6 +44,10 @@ CLUTTER_EXPORT
gboolean clutter_frame_get_target_presentation_time (ClutterFrame *frame,
int64_t *target_presentation_time_us);
CLUTTER_EXPORT
gboolean clutter_frame_get_min_render_time_allowed (ClutterFrame *frame,
int64_t *min_render_time_allowed_us);
CLUTTER_EXPORT
void clutter_frame_set_result (ClutterFrame *frame,
ClutterFrameResult result);