output: add wlr_output_event_commit.buffer
This allows output commit listeners to access the newly committed buffer. Currently wlr_output.front_buffer is used but it'll get removed in the next commit.
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@ -211,6 +211,7 @@ struct wlr_output_event_commit {
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struct wlr_output *output;
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uint32_t committed; // bitmask of enum wlr_output_state_field
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struct timespec *when;
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struct wlr_buffer *buffer; // NULL if no buffer is committed
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};
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enum wlr_output_present_flag {
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@ -743,6 +743,7 @@ bool wlr_output_commit(struct wlr_output *output) {
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.output = output,
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.committed = committed,
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.when = &now,
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.buffer = back_buffer,
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};
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wlr_signal_emit_safe(&output->events.commit, &event);
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