path: root/protocol/wayland.xml

<?xml version="1.0" encoding="UTF-8"?>
<protocol name="wayland">

  <copyright>
    Copyright © 2008-2011 Kristian Høgsberg
    Copyright © 2010-2011 Intel Corporation

    Permission to use, copy, modify, distribute, and sell this
    software and its documentation for any purpose is hereby granted
    without fee, provided that the above copyright notice appear in
    all copies and that both that copyright notice and this permission
    notice appear in supporting documentation, and that the name of
    the copyright holders not be used in advertising or publicity
    pertaining to distribution of the software without specific,
    written prior permission.  The copyright holders make no
    representations about the suitability of this software for any
    purpose.  It is provided "as is" without express or implied
    warranty.

    THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS
    SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
    FITNESS, IN NO EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY
    SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
    WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN
    AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
    ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF
    THIS SOFTWARE.
  </copyright>

  <interface name="wl_display" version="1">
    <description summary="core global object">
      The core global object.  This is a special singleton object.  It
      is used for internal wayland protocol features.
    </description>
    <request name="bind">
      <description summary="bind an object to the display">
	Binds a new, client-created object to the server using @name as
	the identifier.
      </description>
      <arg name="name" type="uint" summary="unique number id for object"/>
      <arg name="interface" type="string"/>
      <arg name="version" type="uint"/>
      <arg name="id" type="new_id" interface="wl_object"/>
    </request>

    <request name="sync">
      <description summary="asynchronous roundtrip">
	The sync request asks the server to invoke the 'done' request
	on the provided wl_callback object.  Since requests are
	handled in-order, this can be used as a barrier to ensure all
	previous requests have been handled.
      </description>
      <arg name="callback" type="new_id" interface="wl_callback"/>
    </request>

    <event name="error">
      <description summary="fatal error event">
	The error event is sent out when a fatal (non-recoverable)
	error has occurred.
      </description>
      <arg name="object_id" type="object" interface="wl_object"/>
      <arg name="code" type="uint"/>
      <arg name="message" type="string"/>
    </event>

    <enum name="error">
      <description summary="global error values">
	These errors are global and can be emitted in response to any
	server request.
      </description>
      <entry name="invalid_object" value="0"
	     summary="server couldn't find object"/>
      <entry name="invalid_method" value="1"
	     summary="method doesn't exist on the specified interface"/>
      <entry name="no_memory" value="2"
	     summary="server is out of memory"/>
    </enum>

    <event name="global">
      <description summary="announce global object">
	Notify the client of global objects.  These are objects that
	are created by the server.  Globals are published on the
	initial client connection sequence, upon device hotplugs,
	device disconnects, reconfiguration or other events.  A client
	can 'bind' to a global object by using the bind request.  This
	creates a client side handle that lets the object emit events
	to the client and lets the client invoke requests on the
	object.
      </description>
      <arg name="name" type="uint"/>
      <arg name="interface" type="string"/>
      <arg name="version" type="uint"/>
    </event>

    <event name="global_remove">
      <description summary="announce removal of global object">
	Notify the client of removed global objects.
      </description>
      <arg name="name" type="uint"/>
    </event>

    <event name="delete_id">
      <description summary="acknowledge object id deletion">
	Server has deleted the id and client can now reuse it.
      </description>
      <arg name="id" type="uint" />
    </event>
  </interface>

  <interface name="wl_callback" version="1">
    <event name="done">
      <arg name="serial" type="uint"/>
    </event>
  </interface>

  <interface name="wl_compositor" version="1">
    <description summary="the compositor singleton">
      A compositor.  This object is a singleton global.  The
      compositor is in charge of combining the contents of multiple
      surfaces into one displayable output.
    </description>

    <request name="create_surface">
      <description summary="create new surface">
	Ask the compositor to create a new surface.
      </description>
      <arg name="id" type="new_id" interface="wl_surface"/>
    </request>

    <request name="create_region">
      <description summary="create new region">
	Ask the compositor to create a new region.
      </description>
      <arg name="id" type="new_id" interface="wl_region"/>
    </request>
  </interface>

  <interface name="wl_shm_pool" version="1">
    <description summary="a shared memory pool">
      The wl_shm_pool object encapsulates a piece of memory shared
      between the compsitor and client.  Through the wl_shm_pool
      object, the client can allocate shared memory wl_buffer objects.
      The objects will share the same underlying mapped memory.
      Reusing the mapped memory avoids the setup/teardown overhead and
      is useful when interactively resizing a surface or for many
      small buffers.
    </description>

    <request name="create_buffer">
      <description summary="create wl_buffer from pool">
	Create a wl_buffer from the pool.  The buffer is created a
	offset bytes into the pool and has width and height as
	specified.  The stride arguments specifies the number of bytes
	from beginning of one row to the beginning of the next.  The
	format is the pixel format of the buffer and must be one of
	those advertised through the wl_shm.format event.

	A buffer will keep a reference to the pool it was created from
	so it is valid to destroy the pool immediatedly after creating
	a buffer from it.
      </description>

      <arg name="id" type="new_id" interface="wl_buffer"/>
      <arg name="offset" type="int"/>
      <arg name="width" type="int"/>
      <arg name="height" type="int"/>
      <arg name="stride" type="int"/>
      <arg name="format" type="uint"/>
    </request>

    <request name="destroy" type="destructor">
      <description summary="destroy the pool">
	Destroy the pool.
      </description>
    </request>

    <request name="resize">
      <description summary="change the size of the pool mapping">
	This request will cause the server to remap the backing memory
	for the pool from the fd passed when the pool was creating but
	using the new size.
      </description>

      <arg name="size" type="int"/>
    </request>
  </interface>

  <interface name="wl_shm" version="1">
    <description summary="shared memory support">
      Support for shared memory buffers.
    </description>

    <enum name="error">
      <entry name="invalid_format" value="0"/>
      <entry name="invalid_stride" value="1"/>
      <entry name="invalid_fd" value="2"/>
    </enum>

    <enum name="format">
      <entry name="argb8888" value="0"/>
      <entry name="xrgb8888" value="1"/>
    </enum>

    <request name="create_pool">
      <description summary="create a shm pool">
	This creates wl_shm_pool object, which can be used to create
	shared memory based wl_buffer objects.  The server will mmap
	size bytes of the passed fd, to use as backing memory for then
	pool.
      </description>

      <arg name="id" type="new_id" interface="wl_shm_pool"/>
      <arg name="fd" type="fd"/>
      <arg name="size" type="int"/>
    </request>

    <event name="format">
      <arg name="format" type="uint"/>
    </event>
  </interface>

  <interface name="wl_buffer" version="1">
    <description summary="content for a wl_surface">
      A buffer provides the content for a wl_surface.  Buffers are
      created through factory interfaces such as wl_drm, wl_shm or
      similar.  It has a width and a height and can be attached to a
      wl_surface, but the mechanism by which a client provides and
      updates the contents is defined by the buffer factory interface
    </description>

    <request name="destroy" type="destructor">
      <description summary="destroy a buffer">
	Destroy a buffer.  This will invalidate the object id.
      </description>
    </request>

    <event name="release">
      <description summary="compositor releases buffer">
	Sent when an attached buffer is no longer used by the compositor.
      </description>
    </event>
  </interface>


  <interface name="wl_data_offer" version="1">
    <request name="accept">
      <description summary="accept one of the offered mime-types">
	Indicate that the client can accept the given mime-type, or
	NULL for not accepted.  Use for feedback during drag and drop.
      </description>

      <arg name="serial" type="uint"/>
      <arg name="type" type="string" allow-null="true"/>
    </request>

    <request name="receive">
      <arg name="mime_type" type="string"/>
      <arg name="fd" type="fd"/>
    </request>

    <request name="destroy" type="destructor"/>

    <event name="offer">
      <description summary="advertise offered mime-type">
	Sent immediately after creating the wl_data_offer object.  One
	event per offered mime type.
      </description>

      <arg name="type" type="string"/>
    </event>
  </interface>

  <interface name="wl_data_source" version="1">
    <request name="offer">
      <description summary="add an offered mime type">
	This request adds a mime-type to the set of mime-types
	advertised to targets.  Can be called several times to offer
	multiple types.
      </description>
      <arg name="type" type="string"/>
    </request>

    <request name="destroy" type="destructor">
      <description summary="destroy the data source">
	Destroy the data source.
      </description>
    </request>

    <event name="target">
      <description summary="a target accepts an offered mime-type">
	Sent when a target accepts pointer_focus or motion events.  If
	a target does not accept any of the offered types, type is NULL.
      </description>

      <arg name="mime_type" type="string" allow-null="true"/>
    </event>

    <event name="send">
      <description summary="send the data">
	Request for data from another client.  Send the data as the
	specified mime-type over the passed fd, then close the fd.
      </description>

      <arg name="mime_type" type="string"/>
      <arg name="fd" type="fd"/>
    </event>

    <event name="cancelled">
      <description summary="selection was cancelled">
	Another selection became active.
      </description>
    </event>

  </interface>

  <interface name="wl_data_device" version="1">
    <request name="start_drag">
      <description summary="start drag and drop operation">
	This request asks the compositor to start a drag and drop
	operation on behalf of the client.

	The source argument is the data source that provides the data
	for the eventual data transfer. If source is NULL, enter, leave
	and motion events are sent only to the client that initiated the
	drag and the client is expected to handle the data passing
	internally.

	The origin surface is the surface where the drag originates and
	the client must have an active implicit grab that matches the
	serial.

	The icon surface is an optional (can be nil) surface that
	provides an icon to be moved around with the cursor.  Initially,
	the top-left corner of the icon surface is placed at the cursor
	hotspot, but subsequent surface.attach request can move the
	relative position.
      </description>
      <arg name="source" type="object" interface="wl_data_source" allow-null="true"/>
      <arg name="origin" type="object" interface="wl_surface"/>
      <arg name="icon" type="object" interface="wl_surface" allow-null="true"/>
      <arg name="serial" type="uint"/>
    </request>

    <request name="set_selection">
      <arg name="source" type="object" interface="wl_data_source" allow-null="true"/>
      <arg name="serial" type="uint"/>
    </request>

    <event name="data_offer">
      <description summary="introduce a new wl_data_offer">
	The data_offer event introduces a new wl_data_offer object,
	which will subsequently be used in either the
	data_device.enter event (for drag and drop) or the
	data_device.selection event (for selections).  Immediately
	following the data_device_data_offer event, the new data_offer
	object will send out data_offer.offer events to describe the
	mime-types it offers.
      </description>

      <arg name="id" type="new_id" interface="wl_data_offer"/>
    </event>

    <event name="enter">
      <arg name="serial" type="uint"/>
      <arg name="surface" type="object" interface="wl_surface"/>
      <arg name="x" type="fixed"/>
      <arg name="y" type="fixed"/>
      <arg name="id" type="object" interface="wl_data_offer"/>
    </event>

    <event name="leave"/>

    <event name="motion">
      <arg name="time" type="uint"/>
      <arg name="x" type="fixed"/>
      <arg name="y" type="fixed"/>
    </event>

    <event name="drop"/>

    <event name="selection">
      <description summary="advertise new selection">
	The selection event is sent out to notify the client of a new
	wl_data_offer for the selection for this device.  The
	data_device.data_offer and the data_offer.offer events are
	sent out immediately before this event to introduce the data
	offer object.  The selection event is sent to a client
	immediately before receiving keyboard focus and when a new
	selection is set while the client has keyboard focus.  The
	data_offer is valid until a new data_offer or NULL is received
	or until the client loses keyboard focus.
      </description>
      <arg name="id" type="object" interface="wl_data_offer" allow-null="true"/>
    </event>
  </interface>

  <interface name="wl_data_device_manager" version="1">
    <request name="create_data_source">
      <arg name="id" type="new_id" interface="wl_data_source"/>
    </request>

    <request name="get_data_device">
      <arg name="id" type="new_id" interface="wl_data_device"/>
      <arg name="seat" type="object" interface="wl_seat"/>
    </request>
  </interface>

  <interface name="wl_shell" version="1">
    <request name="get_shell_surface">
      <arg name="id" type="new_id" interface="wl_shell_surface"/>
      <arg name="surface" type="object" interface="wl_surface"/>
    </request>
  </interface>

  <interface name="wl_shell_surface" version="1">

    <description summary="desktop style meta data interface">
      An interface implemented by a wl_surface.  On server side the
      object is automatically destroyed when the related wl_surface is
      destroyed.  On client side, wl_shell_surface_destroy() must be
      called before destroying the wl_surface object.
    </description>

    <request name="pong">
      <description summary="respond to a ping event">
	A client must respond to a ping event with a pong request or
	the client may be deemed unresponsive.
      </description>
      <arg name="serial" type="uint"/>
    </request>

    <request name="move">
      <arg name="seat" type="object" interface="wl_seat"/>
      <arg name="serial" type="uint"/>
    </request>

    <enum name="resize">
      <entry name="none" value="0"/>
      <entry name="top" value="1"/>
      <entry name="bottom" value="2"/>
      <entry name="left" value="4"/>
      <entry name="top_left" value="5"/>
      <entry name="bottom_left" value="6"/>
      <entry name="right" value="8"/>
      <entry name="top_right" value="9"/>
      <entry name="bottom_right" value="10"/>
    </enum>

    <request name="resize">
      <arg name="seat" type="object" interface="wl_seat"/>
      <arg name="serial" type="uint"/>
      <arg name="edges" type="uint"/>
    </request>

    <request name="set_toplevel">
      <description summary="make the surface a top level surface">
	Make the surface a toplevel window.
      </description>
    </request>

    <enum name="transient">
      <entry name="inactive" value="0x1" summary="do not set keyboard focus"/>
    </enum>

    <request name="set_transient">
      <description summary="make the surface a transient surface">
	Map the surface relative to an existing surface. The x and y
	arguments specify the locations of the upper left corner of
	the surface relative to the upper left corner of the parent
	surface.  The flags argument controls overflow/clipping
	behaviour when the surface would intersect a screen edge,
	panel or such.  And possibly whether the offset only
	determines the initial position or if the surface is locked to
	that relative position during moves.
      </description>

      <arg name="parent" type="object" interface="wl_surface"/>
      <arg name="x" type="int"/>
      <arg name="y" type="int"/>
      <arg name="flags" type="uint"/>
    </request>

    <request name="set_fullscreen">
      <description summary="make the surface a fullscreen surface">
        Map the surface as a fullscreen surface. If an output parameter is
        given then the surface will be made fullscreen on that output. If the
        client does not specify the output then the compositor will apply its
        policy - usually choosing the output on which the surface has the
        biggest surface area.

        The client may specify a method to resolve a size conflict between the
        output size and the surface size - this is provided through the
        fullscreen_method parameter.

        The framerate parameter is used only when the fullscreen_method is set
        to "driver", to indicate the preferred framerate. framerate=0 indicates
        that the app does not care about framerate.  The framerate is
        specified in mHz, that is framerate of 60000 is 60Hz.

        The compositor must reply to this request with a configure event with
        the dimensions for the output on which the surface will be made fullscreen.
      </description>
      <arg name="method" type="uint"/>
      <arg name="framerate" type="uint"/>
      <arg name="output" type="object" interface="wl_output" allow-null="true"/>
    </request>

    <enum name="fullscreen_method">
      <description summary="different method to set the surface fullscreen">
        Hints to indicate compositor how to deal with a conflict between the
        dimensions for the surface and the dimensions of the output. As a hint
        the compositor is free to ignore this parameter.

        "default" The client has no preference on fullscreen behavior,
        policies are determined by compositor.

        "scale" The client prefers scaling by the compositor. Scaling would
        always preserve surface's aspect ratio with surface centered on the
        output

        "driver" The client wants to switch video mode to the smallest mode
        that can fit the client buffer. If the sizes do not match the
        compositor must add black borders.

        "fill" The surface is centered on the output on the screen with no
        scaling. If the surface is of insufficient size the compositor must
        add black borders.
      </description>
      <entry name="default" value="0"/>
      <entry name="scale" value="1"/>
      <entry name="driver" value="2"/>
      <entry name="fill" value="3"/>
    </enum>

    <request name="set_popup">
      <description summary="make the surface a popup surface">
	Popup surfaces.  Will switch an implicit grab into
	owner-events mode, and grab will continue after the implicit
	grab ends (button released).  Once the implicit grab is over,
	the popup grab continues until the window is destroyed or a
	mouse button is pressed in any other clients window.  A click
	in any of the clients surfaces is reported as normal, however,
	clicks in other clients surfaces will be discarded and trigger
	the callback.

	TODO: Grab keyboard too, maybe just terminate on any click
	inside or outside the surface?
      </description>

      <arg name="seat" type="object" interface="wl_seat"/>
      <arg name="serial" type="uint"/>
      <arg name="parent" type="object" interface="wl_surface"/>
      <arg name="x" type="int"/>
      <arg name="y" type="int"/>
      <arg name="flags" type="uint"/>
    </request>

    <request name="set_maximized">
      <description summary="make the surface a maximized surface">
	A request from the client to notify the compositor the maximized
	operation. The compositor will reply with a configure event telling
        the expected new surface size. The operation is completed on the
        next buffer attach to this surface.
        A maximized client will fill the fullscreen of the output it is bound
        to, except the panel area. This is the main difference between
        a maximized shell surface and a fullscreen shell surface.
      </description>
      <arg name="output" type="object" interface="wl_output" allow-null="true"/>
    </request>

    <request name="set_title">
      <description summary="set surface title">
      </description>
      <arg name="title" type="string"/>
    </request>

    <request name="set_class">
      <description summary="set surface class">
	The surface class identifies the general class of applications
	to which the surface belongs.  The class is the file name of
	the applications .desktop file (absolute path if non-standard
	location). 
      </description>
      <arg name="class_" type="string"/>
    </request>

    <event name="ping">
      <description summary="ping client">
	Ping a client to check if it is receiving events and sending
	requests. A client is expected to reply with a pong request.
      </description>
      <arg name="serial" type="uint"/>
    </event>

    <event name="configure">
      <description summary="suggest resize">
	The configure event asks the client to resize its surface.
	The size is a hint, in the sense that the client is free to
	ignore it if it doesn't resize, pick a smaller size (to
	satisfy aspect ration or resize in steps of NxM pixels).  The
	client is free to dismiss all but the last configure event it
	received.
      </description>

      <arg name="edges" type="uint"/>
      <arg name="width" type="int"/>
      <arg name="height" type="int"/>
    </event>

    <event name="popup_done">
      <description summary="popup interaction is done">
	The popup_done event is sent out when a popup grab is broken,
	that is, when the users clicks a surface that doesn't belong
	to the client owning the popup surface.
      </description>
    </event>
  </interface>

  <interface name="wl_surface" version="1">
    <description summary="an onscreen surface">
      A surface.  This is an image that is displayed on the screen.
      It has a location, size and pixel contents.
    </description>

    <request name="destroy" type="destructor">
      <description summary="delete surface">
	Deletes the surface and invalidates its object id.
      </description>
    </request>

    <request name="attach">
      <description summary="set the surface contents">
	Copy the contents of a buffer into this surface. The x and y
	arguments specify the location of the new buffers upper left
	corner, relative to the old buffers upper left corner.
      </description>

      <arg name="buffer" type="object" interface="wl_buffer" allow-null="true"/>
      <arg name="x" type="int"/>
      <arg name="y" type="int"/>
    </request>

    <request name="damage">
      <description summary="mark part of the surface damaged">
	After attaching a new buffer, this request is used to describe
	the regions where the new buffer is different from the
	previous buffer and needs to be repainted.  Coordinates are
	relative to the new buffer.
      </description>

      <arg name="x" type="int"/>
      <arg name="y" type="int"/>
      <arg name="width" type="int"/>
      <arg name="height" type="int"/>
    </request>

    <request name="frame">
      <description summary="request repaint feedback">
	Request notification when the next frame is displayed.  Useful
	for throttling redrawing operations, and driving animations.
	The notification will only be posted for one frame unless
	requested again.
      </description>

      <arg name="callback" type="new_id" interface="wl_callback"/>
    </request>

    <request name="set_opaque_region">
      <description summary="set opaque region">
	This requests sets the region of the surface that contain
	opaque content.  The opaque region is an optimization hint for
	the compositor that lets it optimize out redrawing of content
	behind opaque regions.  Setting an opaque region is not
	required for correct behaviour, but marking transparent
	content as opaque will result in repaint artifacts.

	The region will be clipped to the extents of the current
	surface size.  Setting the region has copy semantics, and the
	region object can be destroyed immediately after setting the
	opaque region.  If a buffer of a different size is attached or
	if a nil region is set, the opaque region will revert back to
	default.  The default opaque region is empty.
      </description>

      <arg name="region" type="object" interface="wl_region"/>
    </request>

    <request name="set_input_region">
      <description summary="set input region">
	This requests sets the region of the surface that can receive
	pointer and touch events.  The region will be clipped to the
	extents of the current surface size.  Setting the region has
	copy semantics, and the region object can be destroyed
	immediately after setting the input region.  If a buffer of a
	different size is attached or if a nil region is passed, the
	input region will revert back to default.  The default input
	region is the entire surface.
      </description>

      <arg name="region" type="object" interface="wl_region" allow-null="true"/>
    </request>

    <event name="enter">
      <description summary="surface enters an output">
        This is emitted whenever a surface's creation, movement, or resizing
        results in some part of it being within the scanout region of an
        output.
      </description>
      <arg name="output" type="object" interface="wl_output"/>
    </event>

    <event name="leave">
      <description summary="surface leaves an output">
        This is emitted whenever a surface's creation, movement, or resizing
        results in it no longer having any part of it within the scanout region
        of an output.
      </description>
      <arg name="output" type="object" interface="wl_output"/>
    </event>
  </interface>

  <interface name="wl_seat" version="1">
    <description summary="seat">
      A group of keyboards, pointer (mice, for example) and touch
      devices . This object is published as a global during start up,
      or when such a device is hot plugged.  A seat typically has a
      pointer and maintains a keyboard_focus and a pointer_focus.
    </description>

    <enum name="capability">
      <description summary="seat capability bitmask">
        This is a bitmask of capabilities this seat has; if a member is
	set, then it is present on the seat.
      </description>
      <entry name="pointer" value="1" summary="wl_pointer"/>
      <entry name="keyboard" value="2" summary="wl_keyboard"/>
      <entry name="touch" value="4" summary="wl_touch"/>
    </enum>


    <event name="capabilities">
      <description summary="seat capabilities changed">
        This is emitted whenever a seat gains or loses the pointer,
	keyboard or touch capabilities.  The argument is a wl_seat_caps_mask
	enum containing the complete set of capabilities this seat has.
      </description>
      <arg name="capabilities" type="uint"/>
    </event>

    <request name="get_pointer">
      <description summary="return pointer object">
        The ID provided will be initialized to the wl_pointer interface
	for this seat.
      </description>
      <arg name="id" type="new_id" interface="wl_pointer"/>
    </request>

    <request name="get_keyboard">
      <description summary="return pointer object">
        The ID provided will be initialized to the wl_keyboard interface
	for this seat.
      </description>
      <arg name="id" type="new_id" interface="wl_keyboard"/>
    </request>

    <request name="get_touch">
      <description summary="return pointer object">
        The ID provided will be initialized to the wl_touch interface
	for this seat.
      </description>
      <arg name="id" type="new_id" interface="wl_touch"/>
    </request>
  </interface>

  <interface name="wl_pointer" version="1">
    <request name="set_cursor">
      <description summary="set the pointer surface">
	Set the pointer surface, i.e., the surface that contains the
	pointer image. This request only takes effect if the pointer
	focus for this device is one of the requesting client surfaces
	or the surface parameter is the current pointer surface. If
	there was a previous surface set with this request it is
	replaced. If surface is NULL, the pointer image is hidden.

	The parameters hotspot_x and hotspot_y define the position of
	the pointer surface relative to the pointer location. Its
	top-left corner is always at (x, y) - (hotspot_x, hotspot_y),
	where (x, y) are the coordinates of the pointer location.

	On surface.attach requests to the pointer surface, hotspot_x
	and hotspot_y are decremented by the x and y parameters
	passed to the request.

	The hotspot can also be updated by passing the current set
	pointer surface to this request with new values for hotspot_x
	and/or hotspot_y.
      </description>

      <arg name="serial" type="uint"/>
      <arg name="surface" type="object" interface="wl_surface" allow-null="true"/>
      <arg name="hotspot_x" type="int"/>
      <arg name="hotspot_y" type="int"/>
    </request>

    <event name="enter">
      <description summary="enter event">
	Notification that this seat's pointer is focused on a certain
	surface. When an seat's focus enters a surface, the pointer image
	is undefined and a client should respond to this event by setting
	an appropriate pointer image.
      </description>

      <arg name="serial" type="uint"/>
      <arg name="surface" type="object" interface="wl_surface"/>
      <arg name="surface_x" type="fixed"/>
      <arg name="surface_y" type="fixed"/>
    </event>

    <event name="leave">
      <description summary="leave event">
      </description>
      <arg name="serial" type="uint"/>
      <arg name="surface" type="object" interface="wl_surface"/>
    </event>

    <event name="motion">
      <description summary="pointer motion event">
	Notification of pointer location change. The arguments surface_[xy]
	are the location relative to the focused surface.
      </description>

      <arg name="time" type="uint"/>
      <arg name="surface_x" type="fixed"/>
      <arg name="surface_y" type="fixed"/>
    </event>

    <enum name="button_state">
      <description summary="physical button state">
        Describes the physical state of a button which provoked the button
	event.
      </description>
      <entry name="released" value="0" summary="button is not pressed"/>
      <entry name="pressed" value="1" summary="button is pressed"/>
    </enum>

    <event name="button">
      <description summary="pointer button event">
	Mouse button click and release notifications.  The location
	of the click is given by the last motion or pointer_focus event.
      </description>

      <arg name="serial" type="uint"/>
      <arg name="time" type="uint"/>
      <arg name="button" type="uint"/>
      <arg name="state" type="uint"/>
    </event>

    <enum name="axis">
      <description summary="axis types"/>
      <entry name="vertical_scroll" value="0"/>
      <entry name="horizontal_scroll" value="1"/>
    </enum>

    <event name="axis">
      <description summary="axis event">
	Scroll and other axis notifications.
      </description>

      <arg name="time" type="uint"/>
      <arg name="axis" type="uint"/>
      <arg name="value" type="fixed"/>
    </event>
  </interface>

  <interface name="wl_keyboard" version="1">
    <description summary="keyboard input device">
    </description>

    <enum name="keymap_format">
      <description summary="keyboard mapping format">
        This enum specifies the format of the keymap provided to the client
	with the wl_keyboard::keymap event.
      </description>
      <entry name="xkb_v1" value="1" description="libxkbcommon compatible"/>
    </enum>

    <event name="keymap">
      <description summary="keyboard mapping">
        This event provides a file descriptor to the client which can be
	memory-mapped to provide a keyboard mapping description.
      </description>
      <arg name="format" type="uint"/>
      <arg name="fd" type="fd"/>
      <arg name="size" type="uint"/>
    </event>

    <event name="enter">
      <arg name="serial" type="uint"/>
      <arg name="surface" type="object" interface="wl_surface"/>
      <arg name="keys" type="array"/>
    </event>

    <event name="leave">
      <arg name="serial" type="uint"/>
      <arg name="surface" type="object" interface="wl_surface"/>
    </event>

    <enum name="key_state">
      <description summary="physical key state">
        Describes the physical state of a key which provoked the key event.
	When a key repeats, the sequence is down -> repeat -> repeat -> up.
      </description>
      <entry name="released" value="0" summary="key is not pressed"/>
      <entry name="pressed" value="1" summary="key is pressed"/>
      <entry name="repeat" value="2" summary="key is pressed and repeating"/>
    </enum>

    <event name="key">
      <description summary="key event">
	A key was pressed or released.
      </description>

      <arg name="serial" type="uint"/>
      <arg name="time" type="uint"/>
      <arg name="key" type="uint"/>
      <arg name="state" type="uint"/>
    </event>

    <event name="modifiers">
      <description summary="modifier and group state">
        Notifies clients that the modifier and/or group state has
	changed, and it should update its local state.
      </description>

      <arg name="serial" type="uint"/>
      <arg name="mods_depressed" type="uint"/>
      <arg name="mods_latched" type="uint"/>
      <arg name="mods_locked" type="uint"/>
      <arg name="group" type="uint"/>
    </event>
  </interface>

  <interface name="wl_touch" version="1">
    <description summary="touch screen input device">
    </description>

    <event name="down">
      <arg name="serial" type="uint"/>
      <arg name="time" type="uint"/>
      <arg name="surface" type="object" interface="wl_surface"/>
      <arg name="id" type="int" />
      <arg name="x" type="fixed" />
      <arg name="y" type="fixed" />
    </event>

    <event name="up">
      <arg name="serial" type="uint"/>
      <arg name="time" type="uint"/>
      <arg name="id" type="int" />
    </event>

    <event name="motion">
      <arg name="time" type="uint"/>
      <arg name="id" type="int" />
      <arg name="x" type="fixed" />
      <arg name="y" type="fixed" />
    </event>

    <event name="frame">
      <description summary="end of touch frame event">
	Indicates the end of a contact point list.
      </description>
    </event>

    <event name="cancel">
      <description summary="touch session cancelled">
	Sent if the compositor decides the touch stream is a global
	gesture. No further events are sent to the clients from that
	particular gesture.
      </description>
    </event>
  </interface>


  <interface name="wl_output" version="1">
    <description summary="compositor output region">
      An output describes part of the compositor geometry.  The
      compositor work in the 'compositor coordinate system' and an
      output corresponds to rectangular area in that space that is
      actually visible.  This typically corresponds to a monitor that
      displays part of the compositor space.  This object is published
      as global during start up, or when a screen is hot plugged.
    </description>

    <enum name="subpixel">
      <entry name="unknown" value="0"/>
      <entry name="none" value="1"/>
      <entry name="horizontal_rgb" value="2"/>
      <entry name="horizontal_bgr" value="3"/>
      <entry name="vertical_rgb" value="4"/>
      <entry name="vertical_bgr" value="5"/>
    </enum>

    <event name="geometry">
      <description summary="properties of the output"/>
      <arg name="x" type="int"
	   summary="x position within the global compositor space"/>
      <arg name="y" type="int"
	   summary="y position within the global compositor space"/>
      <arg name="physical_width" type="int"
	   summary="width in milimeters of the output"/>
      <arg name="physical_height" type="int"
	   summary="height in milimeters of the output"/>
      <arg name="subpixel" type="int"
	   summary="subpixel orientation of the output"/>
      <arg name="make" type="string"
	   summary="textual description of the manufacturer"/>
      <arg name="model" type="string"
	   summary="textual description of the model"/>
    </event>

    <enum name="mode">
      <description summary="values for the flags bitfield in the mode event"/>
      <entry name="current" value="0x1"
	     summary="indicates this is the current mode"/>
      <entry name="preferred" value="0x2"
	     summary="indicates this is the preferred mode"/>
    </enum>
      
    <event name="mode">
      <description summary="advertise available modes for the output">
	The mode event describes an available mode for the output.
	The event is sent when binding to the output object and there
	will always be one mode, the current mode.  The event is sent
	again if an output changes mode, for the mode that is now
	current.  In other words, the current mode is always the last
	mode that was received with the current flag set.
      </description>
      <arg name="flags" type="uint" summary="mask of wl_output_mode flags"/>
      <arg name="width" type="int" summary="width of the mode in pixels"/>
      <arg name="height" type="int" summary="height of the mode in pixels"/>
      <arg name="refresh" type="int" summary="vertical refresh rate in mHz"/>
    </event>
  </interface>

  <interface name="wl_region" version="1">
    <description summary="region interface">
      Region.
    </description>

    <request name="destroy" type="destructor">
      <description summary="destroy region">
	Destroy the region.  This will invalidate the object id.
      </description>
    </request>

    <request name="add">
      <description summary="add rectangle to region">
	Add the specified rectangle to the region
      </description>

      <arg name="x" type="int"/>
      <arg name="y" type="int"/>
      <arg name="width" type="int"/>
      <arg name="height" type="int"/>
    </request>

    <request name="subtract">
      <description summary="subtract rectangle from region">
	Subtract the specified rectangle from the region
      </description>

      <arg name="x" type="int"/>
      <arg name="y" type="int"/>
      <arg name="width" type="int"/>
      <arg name="height" type="int"/>
    </request>

  </interface>

</protocol>