mirror of https://github.com/yshui/picom.git
48 lines
1.4 KiB
C
48 lines
1.4 KiB
C
#pragma once
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#include <stdbool.h>
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#include <stdint.h>
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#include <xcb/present.h>
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#include <xcb/xcb.h>
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#include <ev.h>
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#include <xcb/xproto.h>
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#include "config.h"
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#include "x.h"
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/// An object that schedule vblank events.
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struct vblank_scheduler;
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struct vblank_event {
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uint64_t msc;
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uint64_t ust;
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};
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enum vblank_callback_action {
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/// The callback should be called again in the next vblank.
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VBLANK_CALLBACK_AGAIN,
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/// The callback is done and should not be called again.
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VBLANK_CALLBACK_DONE,
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};
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typedef enum vblank_callback_action (*vblank_callback_t)(struct vblank_event *event,
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void *user_data);
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/// Schedule a vblank event.
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///
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/// Schedule for `cb` to be called when the current vblank ends. If this is called
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/// from a callback function for the current vblank, the newly scheduled callback
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/// will be called in the next vblank.
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///
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/// Returns whether the scheduling is successful. Scheduling can fail if there
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/// is not enough memory.
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bool vblank_scheduler_schedule(struct vblank_scheduler *self, vblank_callback_t cb,
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void *user_data);
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struct vblank_scheduler *
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vblank_scheduler_new(struct ev_loop *loop, struct x_connection *c, xcb_window_t target_window,
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enum vblank_scheduler_type type, bool use_realtime_scheduling);
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void vblank_scheduler_free(struct vblank_scheduler *);
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bool vblank_handle_x_events(struct vblank_scheduler *self);
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