Tearing control
wp_tearing_control_manager_v1
For some use cases like games or drawing tablets it can make sense to reduce latency by accepting tearing with the use of asynchronous page flips. This global is a factory interface, allowing clients to inform which type of presentation the content of their surfaces is suitable for.
Graphics APIs like EGL or Vulkan, that manage the buffer queue and commits of a wl_surface themselves, are likely to be using this extension internally. If a client is using such an API for a wl_surface, it should not directly use this extension on that surface, to avoid raising a tearing_control_exists protocol error.
Warning! The protocol described in this file is currently in the testing phase. Backward compatible changes may be added together with the corresponding interface version bump. Backward incompatible changes can only be done by creating a new major version of the extension.
destroy()
Destroy this tearing control factory object. Other objects, including wp_tearing_control_v1 objects created by this factory, are not affected by this request.
get_tearing_control(id: new_id<wp_tearing_control_v1>, surface: object<wl_surface>)
Argument | Type | Description |
|---|---|---|
| id | new_id<wp_tearing_control_v1> | |
| surface | object<wl_surface> |
Instantiate an interface extension for the given wl_surface to request asynchronous page flips for presentation.
If the given wl_surface already has a wp_tearing_control_v1 object associated, the tearing_control_exists protocol error is raised.
error { tearing_control_exists }
Argument | Value | Description |
|---|---|---|
| tearing_control_exists | 0 | the surface already has a tearing object associated |
wp_tearing_control_v1
An additional interface to a wl_surface object, which allows the client to hint to the compositor if the content on the surface is suitable for presentation with tearing. The default presentation hint is vsync. See presentation_hint for more details.
set_presentation_hint(hint: uint<wp_tearing_control_v1.presentation_hint>)
Argument | Type | Description |
|---|---|---|
| hint | uint<wp_tearing_control_v1.presentation_hint> |
Set the presentation hint for the associated wl_surface. This state is double-buffered and is applied on the next wl_surface.commit.
The compositor is free to dynamically respect or ignore this hint based on various conditions like hardware capabilities, surface state and user preferences.
destroy()
Destroy this surface tearing object and revert the presentation hint to vsync. The change will be applied on the next wl_surface.commit.
Argument | Value | Description |
|---|---|---|
| vsync | 0 | Tearing-free presentation The content of this surface is meant to be synchronized to the vertical blanking period. This should not result in visible tearing and may result in a delay before a surface commit is presented. |
| async | 1 | Asynchronous presentation The content of this surface is meant to be presented with minimal latency and tearing is acceptable. |
This enum provides information for if submitted frames from the client may be presented with tearing.
Compositor Support
Mutter  46.1 | KWin  6.0.4 | Sway  1.9 | Hyprland  0.35 | Weston  13 | Mir  2.16 | GameScope  3.14.3 | |
|---|---|---|---|---|---|---|---|
| wp_tearing_control_manager_v1 | x | 1 | x | 1 | 1 | x | x |
Copyright
Copyright © 2021 Xaver Hugl
Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
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