484 lines
20 KiB
XML
484 lines
20 KiB
XML
<?xml version="1.0" encoding="UTF-8"?>
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<protocol name="wlr_output_management_unstable_v1">
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<copyright>
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Copyright © 2019 Purism SPC
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Permission to use, copy, modify, distribute, and sell this
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software and its documentation for any purpose is hereby granted
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without fee, provided that the above copyright notice appear in
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all copies and that both that copyright notice and this permission
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notice appear in supporting documentation, and that the name of
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the copyright holders not be used in advertising or publicity
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pertaining to distribution of the software without specific,
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written prior permission. The copyright holders make no
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representations about the suitability of this software for any
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purpose. It is provided "as is" without express or implied
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warranty.
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THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS
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SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
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FITNESS, IN NO EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY
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SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN
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AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
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ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF
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THIS SOFTWARE.
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</copyright>
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<description summary="protocol to configure output devices">
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This protocol exposes interfaces to obtain and modify output device
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configuration.
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Warning! The protocol described in this file is experimental and
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backward incompatible changes may be made. Backward compatible changes
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may be added together with the corresponding interface version bump.
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Backward incompatible changes are done by bumping the version number in
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the protocol and interface names and resetting the interface version.
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Once the protocol is to be declared stable, the 'z' prefix and the
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version number in the protocol and interface names are removed and the
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interface version number is reset.
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</description>
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<interface name="zwlr_output_manager_v1" version="1">
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<description summary="output device configuration manager">
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This interface is a manager that allows reading and writing the current
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output device configuration.
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Output devices that display pixels (e.g. a physical monitor or a virtual
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output in a window) are represented as heads. Heads cannot be created nor
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destroyed by the client, but they can be enabled or disabled and their
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properties can be changed. Each head may have one or more available modes.
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Whenever a head appears (e.g. a monitor is plugged in), it will be
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advertised via the head event. Immediately after the output manager is
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bound, all current heads are advertised.
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Whenever a head's properties change, the relevant wlr_output_head events
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will be sent. Not all head properties will be sent: only properties that
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have changed need to.
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Whenever a head disappears (e.g. a monitor is unplugged), a
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wlr_output_head.finished event will be sent.
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After one or more heads appear, change or disappear, the done event will
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be sent. It carries a serial which can be used in a create_configuration
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request to update heads properties.
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The information obtained from this protocol should only be used for output
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configuration purposes. This protocol is not designed to be a generic
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output property advertisement protocol for regular clients. Instead,
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protocols such as xdg-output should be used.
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</description>
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<event name="head">
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<description summary="introduce a new head">
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This event introduces a new head. This happens whenever a new head
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appears (e.g. a monitor is plugged in) or after the output manager is
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bound.
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</description>
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<arg name="head" type="new_id" interface="zwlr_output_head_v1"/>
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</event>
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<event name="done">
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<description summary="sent all information about current configuration">
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This event is sent after all information has been sent after binding to
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the output manager object and after any subsequent changes. This applies
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to child head and mode objects as well. In other words, this event is
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sent whenever a head or mode is created or destroyed and whenever one of
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their properties has been changed. Not all state is re-sent each time
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the current configuration changes: only the actual changes are sent.
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This allows changes to the output configuration to be seen as atomic,
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even if they happen via multiple events.
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A serial is sent to be used in a future create_configuration request.
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</description>
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<arg name="serial" type="uint" summary="current configuration serial"/>
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</event>
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<request name="create_configuration">
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<description summary="create a new output configuration object">
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Create a new output configuration object. This allows to update head
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properties.
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</description>
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<arg name="id" type="new_id" interface="zwlr_output_configuration_v1"/>
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<arg name="serial" type="uint"/>
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</request>
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<request name="stop">
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<description summary="stop sending events">
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Indicates the client no longer wishes to receive events for output
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configuration changes. However the compositor may emit further events,
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until the finished event is emitted.
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The client must not send any more requests after this one.
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</description>
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</request>
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<event name="finished">
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<description summary="the compositor has finished with the manager">
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This event indicates that the compositor is done sending manager events.
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The compositor will destroy the object immediately after sending this
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event, so it will become invalid and the client should release any
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resources associated with it.
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</description>
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</event>
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</interface>
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<interface name="zwlr_output_head_v1" version="1">
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<description summary="output device">
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A head is an output device. The difference between a wl_output object and
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a head is that heads are advertised even if they are turned off. A head
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object only advertises properties and cannot be used directly to change
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them.
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A head has some read-only properties: modes, name, description and
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physical_size. These cannot be changed by clients.
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Other properties can be updated via a wlr_output_configuration object.
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Properties sent via this interface are applied atomically via the
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wlr_output_manager.done event. No guarantees are made regarding the order
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in which properties are sent.
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</description>
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<event name="name">
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<description summary="head name">
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This event describes the head name.
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The naming convention is compositor defined, but limited to alphanumeric
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characters and dashes (-). Each name is unique among all wlr_output_head
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objects, but if a wlr_output_head object is destroyed the same name may
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be reused later. The names will also remain consistent across sessions
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with the same hardware and software configuration.
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Examples of names include 'HDMI-A-1', 'WL-1', 'X11-1', etc. However, do
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not assume that the name is a reflection of an underlying DRM
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connector, X11 connection, etc.
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If the compositor implements the xdg-output protocol and this head is
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enabled, the xdg_output.name event must report the same name.
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The name event is sent after a wlr_output_head object is created. This
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event is only sent once per object, and the name does not change over
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the lifetime of the wlr_output_head object.
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</description>
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<arg name="name" type="string"/>
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</event>
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<event name="description">
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<description summary="head description">
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This event describes a human-readable description of the head.
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The description is a UTF-8 string with no convention defined for its
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contents. Examples might include 'Foocorp 11" Display' or 'Virtual X11
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output via :1'. However, do not assume that the name is a reflection of
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the make, model, serial of the underlying DRM connector or the display
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name of the underlying X11 connection, etc.
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If the compositor implements xdg-output and this head is enabled,
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the xdg_output.description must report the same description.
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The description event is sent after a wlr_output_head object is created.
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This event is only sent once per object, and the description does not
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change over the lifetime of the wlr_output_head object.
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</description>
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<arg name="description" type="string"/>
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</event>
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<event name="physical_size">
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<description summary="head physical size">
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This event describes the physical size of the head. This event is only
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sent if the head has a physical size (e.g. is not a projector or a
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virtual device).
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</description>
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<arg name="width" type="int" summary="width in millimeters of the output"/>
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<arg name="height" type="int" summary="height in millimeters of the output"/>
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</event>
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<event name="mode">
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<description summary="introduce a mode">
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This event introduces a mode for this head. It is sent once per
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supported mode.
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</description>
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<arg name="mode" type="new_id" interface="zwlr_output_mode_v1"/>
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</event>
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<event name="enabled">
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<description summary="head is enabled or disabled">
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This event describes whether the head is enabled. A disabled head is not
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mapped to a region of the global compositor space.
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When a head is disabled, some properties (current_mode, position,
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transform and scale) are irrelevant.
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</description>
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<arg name="enabled" type="int" summary="zero if disabled, non-zero if enabled"/>
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</event>
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<event name="current_mode">
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<description summary="current mode">
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This event describes the mode currently in use for this head. It is only
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sent if the output is enabled.
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</description>
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<arg name="mode" type="object" interface="zwlr_output_mode_v1"/>
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</event>
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<event name="position">
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<description summary="current position">
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This events describes the position of the head in the global compositor
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space. It is only sent if the output is enabled.
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</description>
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<arg name="x" type="int"
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summary="x position within the global compositor space"/>
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<arg name="y" type="int"
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summary="y position within the global compositor space"/>
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</event>
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<event name="transform">
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<description summary="current transformation">
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This event describes the transformation currently applied to the head.
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It is only sent if the output is enabled.
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</description>
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<arg name="transform" type="int" enum="wl_output.transform"/>
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</event>
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<event name="scale">
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<description summary="current scale">
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This events describes the scale of the head in the global compositor
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space. It is only sent if the output is enabled.
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</description>
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<arg name="scale" type="fixed"/>
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</event>
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<event name="finished">
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<description summary="the head has been destroyed">
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The compositor will destroy the object immediately after sending this
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event, so it will become invalid and the client should release any
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resources associated with it.
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</description>
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</event>
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</interface>
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<interface name="zwlr_output_mode_v1" version="1">
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<description summary="output mode">
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This object describes an output mode.
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Some heads don't support output modes, in which case modes won't be
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advertised.
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Properties sent via this interface are applied atomically via the
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wlr_output_manager.done event. No guarantees are made regarding the order
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in which properties are sent.
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</description>
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<event name="size">
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<description summary="mode size">
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This event describes the mode size. The size is given in physical
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hardware units of the output device. This is not necessarily the same as
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the output size in the global compositor space. For instance, the output
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may be scaled or transformed.
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</description>
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<arg name="width" type="int" summary="width of the mode in hardware units"/>
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<arg name="height" type="int" summary="height of the mode in hardware units"/>
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</event>
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<event name="refresh">
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<description summary="mode refresh rate">
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This event describes the mode's fixed vertical refresh rate. It is only
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sent if the mode has a fixed refresh rate.
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</description>
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<arg name="refresh" type="int" summary="vertical refresh rate in mHz"/>
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</event>
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<event name="preferred">
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<description summary="mode is preferred">
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This event advertises this mode as preferred.
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</description>
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</event>
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<event name="finished">
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<description summary="the mode has been destroyed">
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The compositor will destroy the object immediately after sending this
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event, so it will become invalid and the client should release any
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resources associated with it.
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</description>
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</event>
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</interface>
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<interface name="zwlr_output_configuration_v1" version="1">
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<description summary="output configuration">
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This object is used by the client to describe a full output configuration.
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First, the client needs to setup the output configuration. Each head can
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be either enabled (and configured) or disabled. It is a protocol error to
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send two enable_head or disable_head requests with the same head. It is a
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protocol error to omit a head in a configuration.
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Then, the client can apply or test the configuration. The compositor will
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then reply with a succeeded, failed or cancelled event. Finally the client
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should destroy the configuration object.
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</description>
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<enum name="error">
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<entry name="already_configured_head" value="1"
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summary="head has been configured twice"/>
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<entry name="unconfigured_head" value="2"
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summary="head has not been configured"/>
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<entry name="already_used" value="3"
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summary="request sent after configuration has been applied or tested"/>
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</enum>
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<request name="enable_head">
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<description summary="enable and configure a head">
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Enable a head. This request creates a head configuration object that can
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be used to change the head's properties.
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</description>
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<arg name="id" type="new_id" interface="zwlr_output_configuration_head_v1"
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summary="a new object to configure the head"/>
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<arg name="head" type="object" interface="zwlr_output_head_v1"
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summary="the head to be enabled"/>
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</request>
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<request name="disable_head">
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<description summary="disable a head">
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Disable a head.
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</description>
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<arg name="head" type="object" interface="zwlr_output_head_v1"
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summary="the head to be disabled"/>
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</request>
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<request name="apply">
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<description summary="apply the configuration">
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Apply the new output configuration.
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In case the configuration is successfully applied, there is no guarantee
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that the new output state matches completely the requested
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configuration. For instance, a compositor might round the scale if it
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doesn't support fractional scaling.
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After this request has been sent, the compositor must respond with an
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succeeded, failed or cancelled event. Sending a request that isn't the
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destructor is a protocol error.
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</description>
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</request>
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<request name="test">
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<description summary="test the configuration">
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Test the new output configuration. The configuration won't be applied,
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but will only be validated.
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Even if the compositor succeeds to test a configuration, applying it may
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fail.
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After this request has been sent, the compositor must respond with an
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succeeded, failed or cancelled event. Sending a request that isn't the
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destructor is a protocol error.
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</description>
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</request>
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<event name="succeeded">
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<description summary="configuration changes succeeded">
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Sent after the compositor has successfully applied the changes or
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tested them.
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Upon receiving this event, the client should destroy this object.
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If the current configuration has changed, events to describe the changes
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will be sent followed by a wlr_output_manager.done event.
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</description>
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</event>
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<event name="failed">
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<description summary="configuration changes failed">
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Sent if the compositor rejects the changes or failed to apply them. The
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compositor should revert any changes made by the apply request that
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triggered this event.
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Upon receiving this event, the client should destroy this object.
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</description>
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</event>
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<event name="cancelled">
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<description summary="configuration has been cancelled">
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Sent if the compositor cancels the configuration because the state of an
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output changed and the client has outdated information (e.g. after an
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output has been hotplugged).
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The client can create a new configuration with a newer serial and try
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again.
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Upon receiving this event, the client should destroy this object.
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</description>
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</event>
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<request name="destroy" type="destructor">
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<description summary="destroy the output configuration">
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Using this request a client can tell the compositor that it is not going
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to use the configuration object anymore. Any changes to the outputs
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that have not been applied will be discarded.
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This request also destroys wlr_output_configuration_head objects created
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via this object.
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</description>
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</request>
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</interface>
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<interface name="zwlr_output_configuration_head_v1" version="1">
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<description summary="head configuration">
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This object is used by the client to update a single head's configuration.
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It is a protocol error to set the same property twice.
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</description>
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<enum name="error">
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<entry name="already_set" value="1" summary="property has already been set"/>
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<entry name="invalid_mode" value="2" summary="mode doesn't belong to head"/>
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<entry name="invalid_custom_mode" value="3" summary="mode is invalid"/>
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<entry name="invalid_transform" value="4" summary="transform value outside enum"/>
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<entry name="invalid_scale" value="5" summary="scale negative or zero"/>
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</enum>
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<request name="set_mode">
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<description summary="set the mode">
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This request sets the head's mode.
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</description>
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<arg name="mode" type="object" interface="zwlr_output_mode_v1"/>
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</request>
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<request name="set_custom_mode">
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<description summary="set a custom mode">
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This request assigns a custom mode to the head. The size is given in
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physical hardware units of the output device. If set to zero, the
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refresh rate is unspecified.
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It is a protocol error to set both a mode and a custom mode.
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</description>
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<arg name="width" type="int" summary="width of the mode in hardware units"/>
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<arg name="height" type="int" summary="height of the mode in hardware units"/>
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<arg name="refresh" type="int" summary="vertical refresh rate in mHz or zero"/>
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</request>
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<request name="set_position">
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<description summary="set the position">
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This request sets the head's position in the global compositor space.
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</description>
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<arg name="x" type="int" summary="x position in the global compositor space"/>
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<arg name="y" type="int" summary="y position in the global compositor space"/>
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</request>
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<request name="set_transform">
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<description summary="set the transform">
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This request sets the head's transform.
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</description>
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<arg name="transform" type="int" enum="wl_output.transform"/>
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</request>
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<request name="set_scale">
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<description summary="set the scale">
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This request sets the head's scale.
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</description>
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<arg name="scale" type="fixed"/>
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</request>
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</interface>
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</protocol>
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