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output: introduce request_state event

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This allows backends to request the compositor to change the state
of an output.

References: https://github.com/swaywm/wlroots/issues/2300#issuecomment-761819673
This commit is contained in:
Simon Ser 2021-01-28 16:04:17 +01:00 • committed by Simon Zeni
parent 024627e872
commit ff55663906
3 changed files with 27 additions and 0 deletions
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16
types/output/output.c
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@ -935,6 +935,22 @@ void wlr_output_send_present(struct wlr_output *output,
wl_signal_emit_mutable(&output->events.present, event);
}
void wlr_output_send_request_state(struct wlr_output *output,
const struct wlr_output_state *state) {
uint32_t unchanged = output_compare_state(output, state);
struct wlr_output_state copy = *state;
copy.committed &= ~unchanged;
if (copy.committed == 0) {
return;
}
struct wlr_output_event_request_state event = {
.output = output,
.state = &copy,
};
wl_signal_emit_mutable(&output->events.request_state, &event);
}
void wlr_output_set_gamma(struct wlr_output *output, size_t size,
const uint16_t *r, const uint16_t *g, const uint16_t *b) {
uint16_t *gamma_lut = NULL;