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compositor: Pull repaint time calculation out of finish_frame

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Make this into a separate functions we can call from other places to get
the same results.

Signed-off-by: Derek Foreman <derek.foreman@collabora.com>
This commit is contained in:
Derek Foreman 2025-11-06 14:16:43 -06:00
parent f36a3a91a8
commit 75f2ec4747
2 changed files with 33 additions and 8 deletions
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38
libweston/compositor.c
View file

@ -3859,6 +3859,35 @@ out:
return false;
}
/** Calculate when we should start a repaint to hit a presentation time
*
* \param output The output
* \param present_time The target presentation time
*
* Using the specified output's refresh rate and configuration, calculate
* the target time to start a repaint to safely hit that presentation
* time without being late or early.
*
* \return The repaint time
*/
struct timespec
weston_output_repaint_from_present(const struct weston_output *output,
const struct timespec *present_time)
{
struct timespec repaint_time;
if (output->frame_flags & WESTON_FINISH_FRAME_TEARING)
return *present_time;
if (output->vrr_mode == WESTON_VRR_MODE_GAME)
return *present_time;
timespec_add_msec(&repaint_time, present_time,
-output->compositor->repaint_msec);
return repaint_time;
}
static void
output_repaint_timer_arm(struct weston_compositor *compositor)
{
@ -4221,14 +4250,7 @@ weston_output_finish_frame(struct weston_output *output,
refresh_nsec);
out:
if (presented_flags & WESTON_FINISH_FRAME_TEARING) {
output->next_repaint = output->next_present;
} else if (output->vrr_mode == WESTON_VRR_MODE_GAME) {
output->next_repaint = output->next_present;
} else {
timespec_add_msec(&output->next_repaint, &output->next_present,
-compositor->repaint_msec);
}
output->next_repaint = weston_output_repaint_from_present(output, &output->next_present);
output->repaint_status = REPAINT_SCHEDULED;
output_repaint_timer_arm(compositor);
}

3
libweston/libweston-internal.h
View file

@ -869,4 +869,7 @@ weston_surface_visibility_mask(struct weston_surface *surface);
void
weston_compositor_apply_transactions(struct weston_compositor *compositor);
struct timespec
weston_output_repaint_from_present(const struct weston_output *output,
const struct timespec *present_time);
#endif