Content type hint
wp_content_type_manager_v1
This interface allows a client to describe the kind of content a surface will display, to allow the compositor to optimize its behavior for it.
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 the content type manager. This doesn't destroy objects created with the manager.
get_surface_content_type(id: new_id<wp_content_type_v1>, surface: object<wl_surface>)
Argument | Type | Description |
|---|---|---|
| id | new_id<wp_content_type_v1> | |
| surface | object<wl_surface> |
Create a new content type object associated with the given surface.
Creating a wp_content_type_v1 from a wl_surface which already has one attached is a client error: already_constructed.
error { already_constructed }
Argument | Value | Description |
|---|---|---|
| already_constructed | 0 | wl_surface already has a content type object |
wp_content_type_v1
The content type object allows the compositor to optimize for the kind of content shown on the surface. A compositor may for example use it to set relevant drm properties like "content type".
The client may request to switch to another content type at any time. When the associated surface gets destroyed, this object becomes inert and the client should destroy it.
destroy()
Switch back to not specifying the content type of this surface. This is equivalent to setting the content type to none, including double buffering semantics. See set_content_type for details.
set_content_type(content_type: uint<wp_content_type_v1.type>)
Argument | Type | Description |
|---|---|---|
| content_type | uint<wp_content_type_v1.type> | the content type |
Set the surface content type. This informs the compositor that the client believes it is displaying buffers matching this content type.
This is purely a hint for the compositor, which can be used to adjust its behavior or hardware settings to fit the presented content best.
The content type is double-buffered state, see wl_surface.commit for details.
Argument | Value | Description |
|---|---|---|
| none | 0 | No content type applies The content type none means that either the application has no data about the content type, or that the content doesn't fit into one of the other categories. |
| photo | 1 | Photo content type The content type photo describes content derived from digital still pictures and may be presented with minimal processing. |
| video | 2 | Video content type The content type video describes a video or animation and may be presented with more accurate timing to avoid stutter. Where scaling is needed, scaling methods more appropriate for video may be used. |
| game | 3 | Game content type The content type game describes a running game. Its content may be presented with reduced latency. |
These values describe the available content types for a surface.
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_content_type_manager_v1 | x | 1 | 1 | x | x | x | x |
Copyright
Copyright © 2021 Emmanuel Gil Peyrot Copyright © 2022 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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