85 lines
2.5 KiB
C
85 lines
2.5 KiB
C
/*
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* This an unstable interface of wlroots. No guarantees are made regarding the
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* future consistency of this API.
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*/
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#ifndef WLR_USE_UNSTABLE
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#error "Add -DWLR_USE_UNSTABLE to enable unstable wlroots features"
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#endif
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#ifndef WLR_TYPES_WLR_PRESENTATION_TIME_H
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#define WLR_TYPES_WLR_PRESENTATION_TIME_H
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#include <stdbool.h>
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#include <stddef.h>
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#include <time.h>
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#include <wayland-server-core.h>
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struct wlr_presentation {
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struct wl_global *global;
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struct wl_list resources; // wl_resource_get_link
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struct wl_list feedbacks; // wlr_presentation_feedback::link
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clockid_t clock;
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struct {
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struct wl_signal destroy;
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} events;
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struct wl_listener display_destroy;
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};
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struct wlr_presentation_feedback {
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struct wlr_presentation *presentation;
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struct wlr_surface *surface; // NULL if the surface has been destroyed
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struct wl_list link; // wlr_presentation::feedbacks
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struct wl_list resources; // wl_resource_get_link
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// The surface contents were committed.
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bool committed;
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// The surface contents were sampled by the compositor and are to be
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// presented on the next flip. Can become true only after committed becomes
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// true.
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bool sampled;
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bool presented;
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struct wl_listener surface_commit;
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struct wl_listener surface_destroy;
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};
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struct wlr_presentation_event {
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struct wlr_output *output;
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uint64_t tv_sec;
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uint32_t tv_nsec;
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uint32_t refresh;
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uint64_t seq;
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uint32_t flags; // wp_presentation_feedback_kind
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};
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struct wlr_backend;
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struct wlr_presentation *wlr_presentation_create(struct wl_display *display,
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struct wlr_backend *backend);
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void wlr_presentation_destroy(struct wlr_presentation *presentation);
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/**
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* Mark the current surface's buffer as sampled.
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*
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* The compositor must call this function when it uses the surface's current
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* contents (e.g. when rendering the surface's current texture, when
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* referencing its current buffer, or when directly scanning out its current
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* buffer). A wlr_presentation_feedback is returned. The compositor should call
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* wlr_presentation_feedback_send_presented if this content has been displayed,
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* then wlr_presentation_feedback_destroy.
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*
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* NULL is returned if the client hasn't requested presentation feedback for
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* this surface.
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*/
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struct wlr_presentation_feedback *wlr_presentation_surface_sampled(
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struct wlr_presentation *presentation, struct wlr_surface *surface);
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void wlr_presentation_feedback_send_presented(
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struct wlr_presentation_feedback *feedback,
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struct wlr_presentation_event *event);
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void wlr_presentation_feedback_destroy(
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struct wlr_presentation_feedback *feedback);
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#endif
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