102 lines
2.9 KiB
C
102 lines
2.9 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_surface;
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struct wlr_output;
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struct wlr_output_event_present;
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struct wlr_presentation {
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struct wl_global *global;
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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 wl_list resources; // wl_resource_get_link
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// Only when the wlr_presentation_surface_sampled_on_output helper has been
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// called
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struct wlr_output *output;
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bool output_committed;
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uint32_t output_commit_seq;
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struct wl_listener output_commit;
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struct wl_listener output_present;
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struct wl_listener output_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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/**
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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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/**
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* Fill a wlr_presentation_event from a wlr_output_event_present.
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*/
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void wlr_presentation_event_from_output(struct wlr_presentation_event *event,
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const struct wlr_output_event_present *output_event);
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/**
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* Mark the current surface's buffer as sampled on the given output.
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*
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* Instead of calling wlr_presentation_surface_sampled and managing the
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* wlr_presentation_feedback itself, the compositor can call this function
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* before a wlr_output_commit call to indicate that the surface's current
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* contents will be displayed on the output.
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*/
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void wlr_presentation_surface_sampled_on_output(
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struct wlr_presentation *presentation, struct wlr_surface *surface,
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struct wlr_output *output);
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#endif
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