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fix screen artifacts when setting gamma 

the artifacts were caused because we tried to set the gamma right after
receiving the event, this resulted in two pending page-flips, which
not always play well together.

This also seems to fix a screen freeze when turning on a monitor that has
gamma.

Additionally the current method won't work once [0] is merged

[0]: https://gitlab.freedesktop.org/wlroots/wlroots/-/merge_requests/4423
This commit is contained in:
Leonardo Hernández Hernández 2023-11-16 20:58:45 -06:00
parent e1f3983bf8
commit 6f8a3f9374
No known key found for this signature in database
GPG Key ID: E538897EE11B9624
1 changed files with 32 additions and 15 deletions
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47
dwl.c
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@ -194,6 +194,7 @@ struct Monitor {
unsigned int sellt;
uint32_t tagset[2];
double mfact;
int gamma_lut_changed;
int nmaster;
char ltsymbol[16];
};
@ -1870,6 +1871,8 @@ rendermon(struct wl_listener *listener, void *data)
* generally at the output's refresh rate (e.g. 60Hz). */
Monitor *m = wl_container_of(listener, m, frame);
Client *c;
struct wlr_output_state pending = {0};
struct wlr_gamma_control_v1 *gamma_control;
struct timespec now;
/* Render if no XDG clients have an outstanding resize and are visible on
@ -1877,12 +1880,38 @@ rendermon(struct wl_listener *listener, void *data)
wl_list_for_each(c, &clients, link)
if (c->resize && !c->isfloating && client_is_rendered_on_mon(c, m) && !client_is_stopped(c))
goto skip;
/*
* HACK: The "correct" way to set the gamma is to commit it together with
* the rest of the state in one go, but to do that we would need to rewrite
* wlr_scene_output_commit() in order to add the gamma to the pending
* state before committing, instead try to commit the gamma in one frame,
* and commit the rest of the state in the next one (or in the same frame if
* the gamma can not be committed).
*/
if (m->gamma_lut_changed) {
gamma_control = wlr_gamma_control_manager_v1_get_control(gamma_control_mgr, m->wlr_output);
m->gamma_lut_changed = 0;
if (!wlr_gamma_control_v1_apply(gamma_control, &pending))
goto commit;
if (!wlr_output_test_state(m->wlr_output, &pending)) {
wlr_gamma_control_v1_send_failed_and_destroy(gamma_control);
goto commit;
}
wlr_output_commit_state(m->wlr_output, &pending);
wlr_output_schedule_frame(m->wlr_output);
} else {
commit:
wlr_scene_output_commit(m->scene_output, NULL);
}
skip:
/* Let clients know a frame has been rendered */
clock_gettime(CLOCK_MONOTONIC, &now);
wlr_scene_output_send_frame_done(m->scene_output, &now);
wlr_output_state_finish(&pending);
}
void
@ -2057,21 +2086,9 @@ void
setgamma(struct wl_listener *listener, void *data)
{
struct wlr_gamma_control_manager_v1_set_gamma_event *event = data;
struct wlr_output_state state;
wlr_output_state_init(&state);
if (!wlr_gamma_control_v1_apply(event->control, &state)) {
wlr_output_state_finish(&state);
return;
}
if (!wlr_output_test_state(event->output, &state)) {
wlr_gamma_control_v1_send_failed_and_destroy(event->control);
wlr_output_state_finish(&state);
return;
}
wlr_output_commit_state(event->output, &state);
wlr_output_schedule_frame(event->output);
Monitor *m = event->output->data;
m->gamma_lut_changed = 1;
wlr_output_schedule_frame(m->wlr_output);
}
void