forked from 12to11/12to11
Check in new files for tearing control protocol
* tearing-control-v1.xml: * tearing_control.c: * tests/tearing_control_test.c: New files.
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120
tearing-control-v1.xml
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120
tearing-control-v1.xml
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<?xml version="1.0" encoding="UTF-8"?>
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<protocol name="tearing_control_v1">
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<copyright>
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Copyright © 2021 Xaver Hugl
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Permission is hereby granted, free of charge, to any person obtaining a
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copy of this software and associated documentation files (the "Software"),
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to deal in the Software without restriction, including without limitation
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the rights to use, copy, modify, merge, publish, distribute, sublicense,
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and/or sell copies of the Software, and to permit persons to whom the
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Software is furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice (including the next
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paragraph) shall be included in all copies or substantial portions of the
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Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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DEALINGS IN THE SOFTWARE.
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</copyright>
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<interface name="wp_tearing_control_manager_v1" version="1">
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<description summary="protocol for tearing control">
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For some use cases like games or drawing tablets it can make sense to
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reduce latency by accepting tearing with the use of asynchronous page
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flips. This global is a factory interface, allowing clients to inform
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which type of presentation the content of their surfaces is suitable for.
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Graphics APIs like EGL or Vulkan, that manage the buffer queue and commits
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of a wl_surface themselves, are likely to be using this extension
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internally. If a client is using such an API for a wl_surface, it should
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not directly use this extension on that surface, to avoid raising a
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tearing_control_exists protocol error.
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Warning! The protocol described in this file is currently in the testing
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phase. Backward compatible changes may be added together with the
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corresponding interface version bump. Backward incompatible changes can
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only be done by creating a new major version of the extension.
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</description>
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<request name="destroy" type="destructor">
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<description summary="destroy tearing control factory object">
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Destroy this tearing control factory object. Other objects, including
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wp_tearing_control_v1 objects created by this factory, are not affected
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by this request.
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</description>
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</request>
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<enum name="error">
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<entry name="tearing_control_exists" value="0"
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summary="the surface already has a tearing object associated"/>
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</enum>
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<request name="get_tearing_control">
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<description summary="extend surface interface for tearing control">
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Instantiate an interface extension for the given wl_surface to request
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asynchronous page flips for presentation.
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If the given wl_surface already has a wp_tearing_control_v1 object
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associated, the tearing_control_exists protocol error is raised.
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</description>
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<arg name="id" type="new_id" interface="wp_tearing_control_v1"/>
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<arg name="surface" type="object" interface="wl_surface"/>
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</request>
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</interface>
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<interface name="wp_tearing_control_v1" version="1">
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<description summary="per-surface tearing control interface">
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An additional interface to a wl_surface object, which allows the client
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to hint to the compositor if the content on the surface is suitable for
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presentation with tearing.
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The default presentation hint is vsync. See presentation_hint for more
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details.
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</description>
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<enum name="presentation_hint">
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<description summary="presentation hint values">
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This enum provides information for if submitted frames from the client
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may be presented with tearing.
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</description>
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<entry name="vsync" value="0">
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<description summary="tearing-free presentation">
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The content of this surface is meant to be synchronized to the
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vertical blanking period. This should not result in visible tearing
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and may result in a delay before a surface commit is presented.
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</description>
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</entry>
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<entry name="async" value="1">
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<description summary="asynchronous presentation">
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The content of this surface is meant to be presented with minimal
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latency and tearing is acceptable.
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</description>
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</entry>
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</enum>
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<request name="set_presentation_hint">
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<description summary="set presentation hint">
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Set the presentation hint for the associated wl_surface. This state is
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double-buffered and is applied on the next wl_surface.commit.
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The compositor is free to dynamically respect or ignore this hint based
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on various conditions like hardware capabilities, surface state and
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user preferences.
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</description>
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<arg name="hint" type="uint" enum="presentation_hint"/>
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</request>
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<request name="destroy" type="destructor">
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<description summary="destroy tearing control object">
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Destroy this surface tearing object and revert the presentation hint to
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vsync. The change will be applied on the next wl_surface.commit.
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</description>
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</request>
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</interface>
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</protocol>
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220
tearing_control.c
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220
tearing_control.c
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/* Wayland compositor running on top of an X server.
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Copyright (C) 2022 to various contributors.
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This file is part of 12to11.
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12to11 is free software: you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by the
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Free Software Foundation, either version 3 of the License, or (at your
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option) any later version.
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12to11 is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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for more details.
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You should have received a copy of the GNU General Public License
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along with 12to11. If not, see <https://www.gnu.org/licenses/>. */
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#include <stdio.h>
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#include "compositor.h"
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#include "tearing-control-v1.h"
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typedef struct _TearingControl TearingControl;
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struct _TearingControl
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{
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/* The associated surface. NULL when detached. */
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Surface *surface;
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/* The associated resource. */
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struct wl_resource *resource;
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};
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/* The tearing control manager. */
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static struct wl_global *tearing_control_manager_global;
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static void
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DestroyTearingControl (struct wl_client *client, struct wl_resource *resource)
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{
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TearingControl *control;
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control = wl_resource_get_user_data (resource);
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if (control->surface)
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{
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/* Reset the presentation hint. */
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control->surface->pending_state.presentation_hint
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= PresentationHintVsync;
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control->surface->pending_state.pending
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|= PendingPresentationHint;
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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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SetPresentationHint (struct wl_client *client, struct wl_resource *resource,
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uint32_t hint)
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{
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TearingControl *control;
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control = wl_resource_get_user_data (resource);
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if (control->surface)
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{
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switch (hint)
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{
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case WP_TEARING_CONTROL_V1_PRESENTATION_HINT_ASYNC:
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control->surface->pending_state.presentation_hint
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= PresentationHintAsync;
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break;
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default:
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control->surface->pending_state.presentation_hint
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= PresentationHintVsync;
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break;
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}
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control->surface->pending_state.pending |= PendingPresentationHint;
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}
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}
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static const struct wp_tearing_control_v1_interface control_impl =
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{
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.destroy = DestroyTearingControl,
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.set_presentation_hint = SetPresentationHint,
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};
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static void
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HandleResourceDestroy (struct wl_resource *resource)
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{
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TearingControl *control, **reference;
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control = wl_resource_get_user_data (resource);
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/* If the surface is still attached to the tearing control, remove
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it from the surface. */
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if (control->surface)
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{
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reference
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= XLSurfaceFindClientData (control->surface,
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TearingControlData);
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XLAssert (reference != NULL);
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*reference = NULL;
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}
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XLFree (control);
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}
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static void
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FreeTearingControlData (void *data)
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{
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TearingControl **control;
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control = data;
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if (!*control)
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return;
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/* Detach the surface from the tearing control. */
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(*control)->surface = NULL;
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}
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static void
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Destroy (struct wl_client *client, 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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GetTearingControl (struct wl_client *client, struct wl_resource *resource,
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uint32_t id, struct wl_resource *surface_resource)
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{
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Surface *surface;
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TearingControl **control;
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surface = wl_resource_get_user_data (surface_resource);
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control = XLSurfaceGetClientData (surface, TearingControlData,
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sizeof *control,
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FreeTearingControlData);
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#define ControlExists \
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WP_TEARING_CONTROL_MANAGER_V1_ERROR_TEARING_CONTROL_EXISTS
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if (*control)
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{
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/* A tearing control resource already exists for this
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surface. */
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wl_resource_post_error (resource, ControlExists,
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"a wp_tearing_control_v1 resource already exists"
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" for the specified surface");
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return;
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}
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#undef ControlExists
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(*control) = XLCalloc (1, sizeof **control);
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(*control)->resource
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= wl_resource_create (client,
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&wp_tearing_control_v1_interface,
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wl_resource_get_version (resource), id);
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if (!(*control)->resource)
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{
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XLFree (*control);
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(*control) = NULL;
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wl_resource_post_no_memory (resource);
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return;
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}
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(*control)->surface = surface;
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wl_resource_set_implementation ((*control)->resource, &control_impl,
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(*control), HandleResourceDestroy);
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}
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static const struct wp_tearing_control_manager_v1_interface manager_impl =
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{
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.destroy = Destroy,
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.get_tearing_control = GetTearingControl,
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};
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static void
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HandleBind (struct wl_client *client, void *data,
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uint32_t version, 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_tearing_control_manager_v1_interface,
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version, id);
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if (!resource)
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{
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wl_client_post_no_memory (client);
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return;
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}
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wl_resource_set_implementation (resource, &manager_impl,
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NULL, NULL);
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}
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void
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XLInitTearingControl (void)
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{
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tearing_control_manager_global
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= wl_global_create (compositor.wl_display,
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&wp_tearing_control_manager_v1_interface,
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1, NULL, HandleBind);
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}
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241
tests/tearing_control_test.c
Normal file
241
tests/tearing_control_test.c
Normal file
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@ -0,0 +1,241 @@
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/* Tests for the Wayland compositor running on the X server.
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Copyright (C) 2022 to various contributors.
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|
|
||||||
|
This file is part of 12to11.
|
||||||
|
|
||||||
|
12to11 is free software: you can redistribute it and/or modify it
|
||||||
|
under the terms of the GNU General Public License as published by the
|
||||||
|
Free Software Foundation, either version 3 of the License, or (at your
|
||||||
|
option) any later version.
|
||||||
|
|
||||||
|
12to11 is distributed in the hope that it will be useful, but WITHOUT
|
||||||
|
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
||||||
|
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
|
||||||
|
for more details.
|
||||||
|
|
||||||
|
You should have received a copy of the GNU General Public License
|
||||||
|
along with 12to11. If not, see <https://www.gnu.org/licenses/>. */
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|
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#include "test_harness.h"
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#include "tearing-control-v1.h"
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/* Tests for buffer release. */
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enum test_kind
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{
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TEARING_CONTROL_KIND,
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TEARING_DESTROY_KIND,
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};
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static const char *test_names[] =
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{
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"tearing_control",
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"tearing_destroy",
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};
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#define LAST_TEST TEARING_CONTROL_KIND
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/* The display. */
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static struct test_display *display;
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/* The tearing control manager. */
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static struct wp_tearing_control_manager_v1 *manager;
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/* Test interfaces. */
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static struct test_interface test_interfaces[] =
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{
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{ "wp_tearing_control_manager_v1", &manager,
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&wp_tearing_control_manager_v1_interface, 1, },
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};
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/* The test surface and Wayland surface. */
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static struct test_surface *test_surface;
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static struct wl_surface *wayland_surface;
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/* The tearing control. */
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static struct wp_tearing_control_v1 *tearing_control;
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/* The presentation hint used. 1 means async, and 0 means vsync. */
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static int used_presentation_mode;
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/* Forward declarations. */
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static void verify_async_used (void);
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static void verify_vsync_used (void);
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|
static struct test_buffer *
|
||||||
|
make_test_buffer (void)
|
||||||
|
{
|
||||||
|
struct wl_buffer *buffer;
|
||||||
|
struct test_buffer *test_buffer;
|
||||||
|
char *empty_data;
|
||||||
|
size_t stride;
|
||||||
|
|
||||||
|
stride = get_image_stride (display, 24, 1);
|
||||||
|
|
||||||
|
if (!stride)
|
||||||
|
report_test_failure ("unknown stride");
|
||||||
|
|
||||||
|
empty_data = calloc (1, stride);
|
||||||
|
|
||||||
|
if (!empty_data)
|
||||||
|
report_test_failure ("failed to allocate buffer data");
|
||||||
|
|
||||||
|
buffer = upload_image_data (display, empty_data, 1, 1, 24);
|
||||||
|
free (empty_data);
|
||||||
|
|
||||||
|
if (!buffer)
|
||||||
|
report_test_failure ("failed to create single pixel buffer");
|
||||||
|
|
||||||
|
test_buffer = get_test_buffer (display, buffer);
|
||||||
|
|
||||||
|
if (!test_buffer)
|
||||||
|
report_test_failure ("failed to create test buffer");
|
||||||
|
|
||||||
|
return test_buffer;
|
||||||
|
}
|
||||||
|
|
||||||
|
static void
|
||||||
|
test_single_step (enum test_kind kind)
|
||||||
|
{
|
||||||
|
struct test_buffer *buffer;
|
||||||
|
|
||||||
|
again:
|
||||||
|
|
||||||
|
test_log ("running test step: %s", test_names[kind]);
|
||||||
|
|
||||||
|
switch (kind)
|
||||||
|
{
|
||||||
|
case TEARING_CONTROL_KIND:
|
||||||
|
#define VSYNC WP_TEARING_CONTROL_V1_PRESENTATION_HINT_VSYNC
|
||||||
|
wp_tearing_control_v1_set_presentation_hint (tearing_control,
|
||||||
|
VSYNC);
|
||||||
|
#undef VSYNC
|
||||||
|
buffer = make_test_buffer ();
|
||||||
|
|
||||||
|
/* Attach the buffer. */
|
||||||
|
wl_surface_attach (wayland_surface, buffer->buffer, 0, 0);
|
||||||
|
wl_surface_commit (wayland_surface);
|
||||||
|
|
||||||
|
/* Now see what kind of presentation was used. */
|
||||||
|
verify_vsync_used ();
|
||||||
|
|
||||||
|
#define ASYNC WP_TEARING_CONTROL_V1_PRESENTATION_HINT_ASYNC
|
||||||
|
wp_tearing_control_v1_set_presentation_hint (tearing_control,
|
||||||
|
ASYNC);
|
||||||
|
#undef ASYNC
|
||||||
|
wl_surface_commit (wayland_surface);
|
||||||
|
|
||||||
|
/* Now verify that async presentation was used. */
|
||||||
|
verify_async_used ();
|
||||||
|
|
||||||
|
kind = TEARING_DESTROY_KIND;
|
||||||
|
goto again;
|
||||||
|
|
||||||
|
case TEARING_DESTROY_KIND:
|
||||||
|
/* Destroy the tearing control resource. */
|
||||||
|
wp_tearing_control_v1_destroy (tearing_control);
|
||||||
|
wl_surface_commit (wayland_surface);
|
||||||
|
|
||||||
|
/* Verify that the tearing hint reverted to vsync. */
|
||||||
|
verify_vsync_used ();
|
||||||
|
break;
|
||||||
|
}
|
||||||
|
|
||||||
|
if (kind == LAST_TEST)
|
||||||
|
test_complete ();
|
||||||
|
}
|
||||||
|
|
||||||
|
|
||||||
|
|
||||||
|
static void
|
||||||
|
handle_test_surface_mapped (void *data, struct test_surface *test_surface,
|
||||||
|
uint32_t xid, const char *display_string)
|
||||||
|
{
|
||||||
|
|
||||||
|
}
|
||||||
|
|
||||||
|
static void
|
||||||
|
handle_test_surface_activated (void *data, struct test_surface *test_surface,
|
||||||
|
uint32_t months, uint32_t milliseconds,
|
||||||
|
struct wl_surface *activator_surface)
|
||||||
|
{
|
||||||
|
|
||||||
|
}
|
||||||
|
|
||||||
|
static void
|
||||||
|
handle_test_surface_committed (void *data, struct test_surface *test_surface,
|
||||||
|
uint32_t presentation_hint)
|
||||||
|
{
|
||||||
|
used_presentation_mode = presentation_hint;
|
||||||
|
}
|
||||||
|
|
||||||
|
static const struct test_surface_listener test_surface_listener =
|
||||||
|
{
|
||||||
|
handle_test_surface_mapped,
|
||||||
|
handle_test_surface_activated,
|
||||||
|
handle_test_surface_committed,
|
||||||
|
};
|
||||||
|
|
||||||
|
static void
|
||||||
|
verify_async_used (void)
|
||||||
|
{
|
||||||
|
wl_display_roundtrip (display->display);
|
||||||
|
|
||||||
|
if (used_presentation_mode != 1)
|
||||||
|
report_test_failure ("async presentation not used where expected!");
|
||||||
|
}
|
||||||
|
|
||||||
|
static void
|
||||||
|
verify_vsync_used (void)
|
||||||
|
{
|
||||||
|
wl_display_roundtrip (display->display);
|
||||||
|
|
||||||
|
if (used_presentation_mode == 1)
|
||||||
|
report_test_failure ("vsync presentation not used where expected!");
|
||||||
|
}
|
||||||
|
|
||||||
|
|
||||||
|
|
||||||
|
static void
|
||||||
|
run_test (void)
|
||||||
|
{
|
||||||
|
if (!make_test_surface (display, &wayland_surface,
|
||||||
|
&test_surface))
|
||||||
|
report_test_failure ("failed to create test surface");
|
||||||
|
|
||||||
|
test_surface_add_listener (test_surface, &test_surface_listener,
|
||||||
|
NULL);
|
||||||
|
|
||||||
|
tearing_control
|
||||||
|
= wp_tearing_control_manager_v1_get_tearing_control (manager,
|
||||||
|
wayland_surface);
|
||||||
|
|
||||||
|
if (!tearing_control)
|
||||||
|
report_test_failure ("failed to create tearing control");
|
||||||
|
|
||||||
|
test_single_step (TEARING_CONTROL_KIND);
|
||||||
|
|
||||||
|
while (true)
|
||||||
|
{
|
||||||
|
if (wl_display_dispatch (display->display) == -1)
|
||||||
|
die ("wl_display_dispatch");
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
int
|
||||||
|
main (void)
|
||||||
|
{
|
||||||
|
test_init ();
|
||||||
|
display = open_test_display (test_interfaces,
|
||||||
|
ARRAYELTS (test_interfaces));
|
||||||
|
|
||||||
|
if (!display)
|
||||||
|
report_test_failure ("failed to open display");
|
||||||
|
|
||||||
|
run_test ();
|
||||||
|
}
|
||||||
Loading…
Add table
Reference in a new issue