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dccc60ec3e
The presentation-time protocol allows surfaces to get accurate timestamps of when their contents were shown on screen. This commit implements a stub version of the protocol which correctly discards all presentation feedback objects (as if the surface contents are never shown on screen). Subsequent commits will implement sending the presented events to surfaces shown on screen. Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1484>
130 lines
4.2 KiB
C
130 lines
4.2 KiB
C
/*
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* presentation-time protocol
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*
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* Copyright (C) 2020 Ivan Molodetskikh <yalterz@gmail.com>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of the
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* License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
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* 02111-1307, USA.
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*
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*/
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#include "config.h"
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#include "meta-wayland-presentation-time-private.h"
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#include <glib.h>
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#include "wayland/meta-wayland-private.h"
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#include "wayland/meta-wayland-surface.h"
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#include "wayland/meta-wayland-versions.h"
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#include "presentation-time-server-protocol.h"
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static void
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wp_presentation_feedback_destructor (struct wl_resource *resource)
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{
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MetaWaylandPresentationFeedback *feedback =
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wl_resource_get_user_data (resource);
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wl_list_remove (&feedback->link);
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g_free (feedback);
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}
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static void
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wp_presentation_destroy (struct wl_client *client,
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struct wl_resource *resource)
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{
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wl_resource_destroy (resource);
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}
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static void
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wp_presentation_feedback (struct wl_client *client,
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struct wl_resource *resource,
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struct wl_resource *surface_resource,
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uint32_t callback_id)
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{
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MetaWaylandSurface *surface = wl_resource_get_user_data (surface_resource);
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MetaWaylandSurfaceState *pending;
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MetaWaylandPresentationFeedback *feedback;
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feedback = g_new0 (MetaWaylandPresentationFeedback, 1);
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wl_list_init (&feedback->link);
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feedback->resource = wl_resource_create (client,
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&wp_presentation_feedback_interface,
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wl_resource_get_version (resource),
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callback_id);
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wl_resource_set_implementation (feedback->resource,
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NULL,
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feedback,
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wp_presentation_feedback_destructor);
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if (surface == NULL)
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{
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g_warn_if_reached ();
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meta_wayland_presentation_feedback_discard (feedback);
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return;
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}
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pending = meta_wayland_surface_get_pending_state (surface);
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wl_list_insert (&pending->presentation_feedback_list, &feedback->link);
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feedback->surface = surface;
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}
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static const struct wp_presentation_interface
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meta_wayland_presentation_interface = {
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wp_presentation_destroy,
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wp_presentation_feedback,
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};
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static void
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wp_presentation_bind (struct wl_client *client,
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void *data,
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uint32_t version,
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uint32_t id)
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{
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struct wl_resource *resource;
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resource = wl_resource_create (client,
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&wp_presentation_interface,
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version,
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id);
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wl_resource_set_implementation (resource,
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&meta_wayland_presentation_interface,
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NULL,
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NULL);
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/* Presentation timestamps in Mutter are guaranteed to be CLOCK_MONOTONIC. */
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wp_presentation_send_clock_id (resource, CLOCK_MONOTONIC);
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}
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void
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meta_wayland_init_presentation_time (MetaWaylandCompositor *compositor)
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{
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if (wl_global_create (compositor->wayland_display,
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&wp_presentation_interface,
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META_WP_PRESENTATION_VERSION,
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NULL,
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wp_presentation_bind) == NULL)
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g_error ("Failed to register a global wp_presentation object");
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}
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void
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meta_wayland_presentation_feedback_discard (MetaWaylandPresentationFeedback *feedback)
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{
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wp_presentation_feedback_send_discarded (feedback->resource);
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wl_resource_destroy (feedback->resource);
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}
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