wl

package
v0.0.0-...-2f2df4f Latest Latest
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 Go to latest Published: Feb 16, 2023 License: MIT Imports: 15 Imported by: 1

Documentation

Index

Constants

View Source 
const (
	DisplayInterface = "wl_display"
	DisplayVersion   = 1
)
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const (
	RegistryInterface = "wl_registry"
	RegistryVersion   = 1
)
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const (
	CallbackInterface = "wl_callback"
	CallbackVersion   = 1
)
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const (
	CompositorInterface = "wl_compositor"
	CompositorVersion   = 4
)
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const (
	ShmPoolInterface = "wl_shm_pool"
	ShmPoolVersion   = 1
)
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const (
	ShmInterface = "wl_shm"
	ShmVersion   = 1
)
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const (
	BufferInterface = "wl_buffer"
	BufferVersion   = 1
)
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const (
	DataOfferInterface = "wl_data_offer"
	DataOfferVersion   = 3
)
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const (
	DataSourceInterface = "wl_data_source"
	DataSourceVersion   = 3
)
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const (
	DataDeviceInterface = "wl_data_device"
	DataDeviceVersion   = 3
)
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const (
	DataDeviceManagerInterface = "wl_data_device_manager"
	DataDeviceManagerVersion   = 3
)
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const (
	ShellInterface = "wl_shell"
	ShellVersion   = 1
)
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const (
	ShellSurfaceInterface = "wl_shell_surface"
	ShellSurfaceVersion   = 1
)
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const (
	SurfaceInterface = "wl_surface"
	SurfaceVersion   = 4
)
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const (
	SeatInterface = "wl_seat"
	SeatVersion   = 7
)
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const (
	PointerInterface = "wl_pointer"
	PointerVersion   = 7
)
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const (
	KeyboardInterface = "wl_keyboard"
	KeyboardVersion   = 7
)
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const (
	TouchInterface = "wl_touch"
	TouchVersion   = 7
)
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const (
	OutputInterface = "wl_output"
	OutputVersion   = 3
)
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const (
	RegionInterface = "wl_region"
	RegionVersion   = 1
)
View Source 
const (
	SubcompositorInterface = "wl_subcompositor"
	SubcompositorVersion   = 1
)
View Source 
const (
	SubsurfaceInterface = "wl_subsurface"
	SubsurfaceVersion   = 1
)

Variables

This section is empty.

Functions

This section is empty.

Types

type Buffer 

type Buffer struct {
	// Listener's methods are called by incoming messages from the
	// remote end via Dispatch. If it is nil, messages are silently
	// ignored.
	Listener BufferListener

	// OnDelete is called when the object is removed from the tracking
	// system.
	OnDelete func()
	// contains filtered or unexported fields
}

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.

func NewBuffer 

func NewBuffer(state wire.State) *Buffer

NewBuffer returns a newly instantiated Buffer. It is primarily intended for use by generated code.

func (*Buffer) Delete 

func (obj *Buffer) Delete()

func (*Buffer) Destroy 

func (obj *Buffer) Destroy()

Destroy a buffer. If and how you need to release the backing storage is defined by the buffer factory interface.

For possible side-effects to a surface, see wl_surface.attach.

func (*Buffer) Dispatch 

func (obj *Buffer) Dispatch(msg *wire.MessageBuffer) error

func (*Buffer) ID 

func (obj *Buffer) ID() uint32

func (*Buffer) Interface 

func (obj *Buffer) Interface() string

func (*Buffer) MethodName 

func (obj *Buffer) MethodName(op uint16) string

func (*Buffer) SetID 

func (obj *Buffer) SetID(id uint32)

func (*Buffer) State 

func (obj *Buffer) State() wire.State

func (*Buffer) String 

func (obj *Buffer) String() string

func (*Buffer) Version 

func (obj *Buffer) Version() uint32

type BufferListener 

type BufferListener interface {
	// Sent when this wl_buffer is no longer used by the compositor.
	// The client is now free to reuse or destroy this buffer and its
	// backing storage.
	//
	// If a client receives a release event before the frame callback
	// requested in the same wl_surface.commit that attaches this
	// wl_buffer to a surface, then the client is immediately free to
	// reuse the buffer and its backing storage, and does not need a
	// second buffer for the next surface content update. Typically
	// this is possible, when the compositor maintains a copy of the
	// wl_surface contents, e.g. as a GL texture. This is an important
	// optimization for GL(ES) compositors with wl_shm clients.
	Release()
}

BufferListener is a type that can respond to incoming messages for a Buffer object.

type Callback 

type Callback struct {
	// Listener's methods are called by incoming messages from the
	// remote end via Dispatch. If it is nil, messages are silently
	// ignored.
	Listener CallbackListener

	// OnDelete is called when the object is removed from the tracking
	// system.
	OnDelete func()
	// contains filtered or unexported fields
}

Clients can handle the 'done' event to get notified when the related request is done.

func NewCallback 

func NewCallback(state wire.State) *Callback

NewCallback returns a newly instantiated Callback. It is primarily intended for use by generated code.

func (*Callback) Delete 

func (obj *Callback) Delete()

func (*Callback) Dispatch 

func (obj *Callback) Dispatch(msg *wire.MessageBuffer) error

func (*Callback) ID 

func (obj *Callback) ID() uint32

func (*Callback) Interface 

func (obj *Callback) Interface() string

func (*Callback) MethodName 

func (obj *Callback) MethodName(op uint16) string

func (*Callback) SetID 

func (obj *Callback) SetID(id uint32)

func (*Callback) State 

func (obj *Callback) State() wire.State

func (*Callback) String 

func (obj *Callback) String() string

func (*Callback) Then 

func (c *Callback) Then(f func(uint32))

Then is a convenience function that sets c's Listener to an implementation that will call f when the Done event is triggered.

func (*Callback) Version 

func (obj *Callback) Version() uint32

type CallbackListener 

type CallbackListener interface {
	// Notify the client when the related request is done.
	Done(callbackData uint32)
}

CallbackListener is a type that can respond to incoming messages for a Callback object.

type Client 

type Client struct {
	// contains filtered or unexported fields
}

Client tracks the connection state, including objects and the event queue. It is the primary interface to a Wayland server.

func Dial 

func Dial() (*Client, error)

Dial opens a connection to the Wayland display based on the current environment. It follows the procedure outlined at https://wayland-book.com/protocol-design/wire-protocol.html#transports

func NewClient 

func NewClient(conn *wire.Conn) *Client

NewClient creates a new client that wraps conn. The returned client assumes responsibility for closing conn.

func (*Client) Add 

func (client *Client) Add(obj wire.Object)

Add adds obj to client's knowledge. Do not call this method unless you know what you are doing.

func (*Client) Close 

func (client *Client) Close() error

Close closes the client, closing the underlying connection, stopping the event queue, and so on.

func (*Client) Delete 

func (client *Client) Delete(id uint32)

Delete deletes the object identified by ID, if it exists. If the object has a delete handler specified, it is called.

func (*Client) DeleteAll 

func (client *Client) DeleteAll()

DeleteAll removes all objects from the client, running their delete handlers where applicable. This is not done automatically, so if you want the handlers to be run when, for example, the client disconnects you must call this yourself.

func (*Client) Display 

func (client *Client) Display() *Display

Display returns the Display object that represents the Wayland server.

func (*Client) Enqueue 

func (client *Client) Enqueue(msg *wire.MessageBuilder)

Enqueue adds msg to the event queue.

func (*Client) Events 

func (client *Client) Events() <-chan func() error

Events returns a channel that yields functions representing events in the client's event queue. These functions should be called in the order that they are yielded. Not doing so will result in undefined behavior.

This channel will be closed when the client's internal processing has stopped.

func (*Client) Get 

func (client *Client) Get(id uint32) wire.Object

Get retrieves an object by ID. If no such object exists, nil is returned.

func (*Client) RoundTrip 

func (client *Client) RoundTrip() error

RoundTrip flushes the event queue continuously until the server indicates that it has finished processing all messages sent by the call to this method.

If the client's connection has been closed, Flush returns net.ErrClosed.

type Compositor 

type Compositor struct {

	// OnDelete is called when the object is removed from the tracking
	// system.
	OnDelete func()
	// contains filtered or unexported fields
}

A compositor. This object is a singleton global. The compositor is in charge of combining the contents of multiple surfaces into one displayable output.

func BindCompositor 

func BindCompositor(state wire.State, registry wire.Binder, name, version uint32) *Compositor

func NewCompositor 

func NewCompositor(state wire.State) *Compositor

NewCompositor returns a newly instantiated Compositor. It is primarily intended for use by generated code.

func (*Compositor) CreateRegion 

func (obj *Compositor) CreateRegion() (id *Region)

Ask the compositor to create a new region.

func (*Compositor) CreateSurface 

func (obj *Compositor) CreateSurface() (id *Surface)

Ask the compositor to create a new surface.

func (*Compositor) Delete 

func (obj *Compositor) Delete()

func (*Compositor) Dispatch 

func (obj *Compositor) Dispatch(msg *wire.MessageBuffer) error

func (*Compositor) ID 

func (obj *Compositor) ID() uint32

func (*Compositor) Interface 

func (obj *Compositor) Interface() string

func (*Compositor) MethodName 

func (obj *Compositor) MethodName(op uint16) string

func (*Compositor) SetID 

func (obj *Compositor) SetID(id uint32)

func (*Compositor) State 

func (obj *Compositor) State() wire.State

func (*Compositor) String 

func (obj *Compositor) String() string

func (*Compositor) Version 

func (obj *Compositor) Version() uint32

type DataDevice 

type DataDevice struct {
	// Listener's methods are called by incoming messages from the
	// remote end via Dispatch. If it is nil, messages are silently
	// ignored.
	Listener DataDeviceListener

	// OnDelete is called when the object is removed from the tracking
	// system.
	OnDelete func()
	// contains filtered or unexported fields
}

There is one wl_data_device per seat which can be obtained from the global wl_data_device_manager singleton.

A wl_data_device provides access to inter-client data transfer mechanisms such as copy-and-paste and drag-and-drop.

func NewDataDevice 

func NewDataDevice(state wire.State) *DataDevice

NewDataDevice returns a newly instantiated DataDevice. It is primarily intended for use by generated code.

func (*DataDevice) Delete 

func (obj *DataDevice) Delete()

func (*DataDevice) Dispatch 

func (obj *DataDevice) Dispatch(msg *wire.MessageBuffer) error

func (*DataDevice) ID 

func (obj *DataDevice) ID() uint32

func (*DataDevice) Interface 

func (obj *DataDevice) Interface() string

func (*DataDevice) MethodName 

func (obj *DataDevice) MethodName(op uint16) string

func (*DataDevice) Release 

func (obj *DataDevice) Release()

This request destroys the data device.

func (*DataDevice) SetID 

func (obj *DataDevice) SetID(id uint32)

func (*DataDevice) SetSelection 

func (obj *DataDevice) SetSelection(source *DataSource, serial uint32)

This request asks the compositor to set the selection to the data from the source on behalf of the client.

To unset the selection, set the source to NULL.

func (*DataDevice) StartDrag 

func (obj *DataDevice) StartDrag(source *DataSource, origin *Surface, icon *Surface, serial uint32)

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. If source is destroyed, the drag-and-drop session will be cancelled.

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 NULL) 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 wl_surface.attach request can move the relative position. Attach requests must be confirmed with wl_surface.commit as usual. The icon surface is given the role of a drag-and-drop icon. If the icon surface already has another role, it raises a protocol error.

The current and pending input regions of the icon wl_surface are cleared, and wl_surface.set_input_region is ignored until the wl_surface is no longer used as the icon surface. When the use as an icon ends, the current and pending input regions become undefined, and the wl_surface is unmapped.

func (*DataDevice) State 

func (obj *DataDevice) State() wire.State

func (*DataDevice) String 

func (obj *DataDevice) String() string

func (*DataDevice) Version 

func (obj *DataDevice) Version() uint32

type DataDeviceError 

type DataDeviceError int64
const (
	// given wl_surface has another role
	DataDeviceErrorRole DataDeviceError = 0
)

func (DataDeviceError) String 

func (enum DataDeviceError) String() string

type DataDeviceListener 

type DataDeviceListener interface {
	// 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.
	DataOffer(id *DataOffer)

	// This event is sent when an active drag-and-drop pointer enters
	// a surface owned by the client.  The position of the pointer at
	// enter time is provided by the x and y arguments, in surface-local
	// coordinates.
	Enter(serial uint32, surface *Surface, x wire.Fixed, y wire.Fixed, id *DataOffer)

	// This event is sent when the drag-and-drop pointer leaves the
	// surface and the session ends.  The client must destroy the
	// wl_data_offer introduced at enter time at this point.
	Leave()

	// This event is sent when the drag-and-drop pointer moves within
	// the currently focused surface. The new position of the pointer
	// is provided by the x and y arguments, in surface-local
	// coordinates.
	Motion(time uint32, x wire.Fixed, y wire.Fixed)

	// The event is sent when a drag-and-drop operation is ended
	// because the implicit grab is removed.
	//
	// The drag-and-drop destination is expected to honor the last action
	// received through wl_data_offer.action, if the resulting action is
	// "copy" or "move", the destination can still perform
	// wl_data_offer.receive requests, and is expected to end all
	// transfers with a wl_data_offer.finish request.
	//
	// If the resulting action is "ask", the action will not be considered
	// final. The drag-and-drop destination is expected to perform one last
	// wl_data_offer.set_actions request, or wl_data_offer.destroy in order
	// to cancel the operation.
	Drop()

	// 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.  The client must
	// destroy the previous selection data_offer, if any, upon receiving
	// this event.
	Selection(id *DataOffer)
}

DataDeviceListener is a type that can respond to incoming messages for a DataDevice object.

type DataDeviceManager 

type DataDeviceManager struct {

	// OnDelete is called when the object is removed from the tracking
	// system.
	OnDelete func()
	// contains filtered or unexported fields
}

The wl_data_device_manager is a singleton global object that provides access to inter-client data transfer mechanisms such as copy-and-paste and drag-and-drop. These mechanisms are tied to a wl_seat and this interface lets a client get a wl_data_device corresponding to a wl_seat.

Depending on the version bound, the objects created from the bound wl_data_device_manager object will have different requirements for functioning properly. See wl_data_source.set_actions, wl_data_offer.accept and wl_data_offer.finish for details.

func BindDataDeviceManager 

func BindDataDeviceManager(state wire.State, registry wire.Binder, name, version uint32) *DataDeviceManager

func NewDataDeviceManager 

func NewDataDeviceManager(state wire.State) *DataDeviceManager

NewDataDeviceManager returns a newly instantiated DataDeviceManager. It is primarily intended for use by generated code.

func (*DataDeviceManager) CreateDataSource 

func (obj *DataDeviceManager) CreateDataSource() (id *DataSource)

Create a new data source.

func (*DataDeviceManager) Delete 

func (obj *DataDeviceManager) Delete()

func (*DataDeviceManager) Dispatch 

func (obj *DataDeviceManager) Dispatch(msg *wire.MessageBuffer) error

func (*DataDeviceManager) GetDataDevice 

func (obj *DataDeviceManager) GetDataDevice(seat *Seat) (id *DataDevice)

Create a new data device for a given seat.

func (*DataDeviceManager) ID 

func (obj *DataDeviceManager) ID() uint32

func (*DataDeviceManager) Interface 

func (obj *DataDeviceManager) Interface() string

func (*DataDeviceManager) MethodName 

func (obj *DataDeviceManager) MethodName(op uint16) string

func (*DataDeviceManager) SetID 

func (obj *DataDeviceManager) SetID(id uint32)

func (*DataDeviceManager) State 

func (obj *DataDeviceManager) State() wire.State

func (*DataDeviceManager) String 

func (obj *DataDeviceManager) String() string

func (*DataDeviceManager) Version 

func (obj *DataDeviceManager) Version() uint32

type DataDeviceManagerDndAction 

type DataDeviceManagerDndAction int64

This is a bitmask of the available/preferred actions in a drag-and-drop operation.

In the compositor, the selected action is a result of matching the actions offered by the source and destination sides. "action" events with a "none" action will be sent to both source and destination if there is no match. All further checks will effectively happen on (source actions ∩ destination actions).

In addition, compositors may also pick different actions in reaction to key modifiers being pressed. One common design that is used in major toolkits (and the behavior recommended for compositors) is:

- If no modifiers are pressed, the first match (in bit order) will be used. - Pressing Shift selects "move", if enabled in the mask. - Pressing Control selects "copy", if enabled in the mask.

Behavior beyond that is considered implementation-dependent. Compositors may for example bind other modifiers (like Alt/Meta) or drags initiated with other buttons than BTN_LEFT to specific actions (e.g. "ask"). 

const (
	// no action
	DataDeviceManagerDndActionNone DataDeviceManagerDndAction = 0

	// copy action
	DataDeviceManagerDndActionCopy DataDeviceManagerDndAction = 1

	// move action
	DataDeviceManagerDndActionMove DataDeviceManagerDndAction = 2

	// ask action
	DataDeviceManagerDndActionAsk DataDeviceManagerDndAction = 4
)

func (DataDeviceManagerDndAction) String 

func (enum DataDeviceManagerDndAction) String() string

type DataOffer 

type DataOffer struct {
	// Listener's methods are called by incoming messages from the
	// remote end via Dispatch. If it is nil, messages are silently
	// ignored.
	Listener DataOfferListener

	// OnDelete is called when the object is removed from the tracking
	// system.
	OnDelete func()
	// contains filtered or unexported fields
}

A wl_data_offer represents a piece of data offered for transfer by another client (the source client). It is used by the copy-and-paste and drag-and-drop mechanisms. The offer describes the different mime types that the data can be converted to and provides the mechanism for transferring the data directly from the source client.

func NewDataOffer 

func NewDataOffer(state wire.State) *DataOffer

NewDataOffer returns a newly instantiated DataOffer. It is primarily intended for use by generated code.

func (*DataOffer) Accept 

func (obj *DataOffer) Accept(serial uint32, mimeType string)

Indicate that the client can accept the given mime type, or NULL for not accepted.

For objects of version 2 or older, this request is used by the client to give feedback whether the client can receive the given mime type, or NULL if none is accepted; the feedback does not determine whether the drag-and-drop operation succeeds or not.

For objects of version 3 or newer, this request determines the final result of the drag-and-drop operation. If the end result is that no mime types were accepted, the drag-and-drop operation will be cancelled and the corresponding drag source will receive wl_data_source.cancelled. Clients may still use this event in conjunction with wl_data_source.action for feedback.

func (*DataOffer) Delete 

func (obj *DataOffer) Delete()

func (*DataOffer) Destroy 

func (obj *DataOffer) Destroy()

Destroy the data offer.

func (*DataOffer) Dispatch 

func (obj *DataOffer) Dispatch(msg *wire.MessageBuffer) error

func (*DataOffer) Finish 

func (obj *DataOffer) Finish()

Notifies the compositor that the drag destination successfully finished the drag-and-drop operation.

Upon receiving this request, the compositor will emit wl_data_source.dnd_finished on the drag source client.

It is a client error to perform other requests than wl_data_offer.destroy after this one. It is also an error to perform this request after a NULL mime type has been set in wl_data_offer.accept or no action was received through wl_data_offer.action.

If wl_data_offer.finish request is received for a non drag and drop operation, the invalid_finish protocol error is raised.

func (*DataOffer) ID 

func (obj *DataOffer) ID() uint32

func (*DataOffer) Interface 

func (obj *DataOffer) Interface() string

func (*DataOffer) MethodName 

func (obj *DataOffer) MethodName(op uint16) string

func (*DataOffer) Receive 

func (obj *DataOffer) Receive(mimeType string, fd *os.File)

To transfer the offered data, the client issues this request and indicates the mime type it wants to receive. The transfer happens through the passed file descriptor (typically created with the pipe system call). The source client writes the data in the mime type representation requested and then closes the file descriptor.

The receiving client reads from the read end of the pipe until EOF and then closes its end, at which point the transfer is complete.

This request may happen multiple times for different mime types, both before and after wl_data_device.drop. Drag-and-drop destination clients may preemptively fetch data or examine it more closely to determine acceptance.

func (*DataOffer) SetActions 

func (obj *DataOffer) SetActions(dndActions DataDeviceManagerDndAction, preferredAction DataDeviceManagerDndAction)

Sets the actions that the destination side client supports for this operation. This request may trigger the emission of wl_data_source.action and wl_data_offer.action events if the compositor needs to change the selected action.

This request can be called multiple times throughout the drag-and-drop operation, typically in response to wl_data_device.enter or wl_data_device.motion events.

This request determines the final result of the drag-and-drop operation. If the end result is that no action is accepted, the drag source will receive wl_data_source.cancelled.

The dnd_actions argument must contain only values expressed in the wl_data_device_manager.dnd_actions enum, and the preferred_action argument must only contain one of those values set, otherwise it will result in a protocol error.

While managing an "ask" action, the destination drag-and-drop client may perform further wl_data_offer.receive requests, and is expected to perform one last wl_data_offer.set_actions request with a preferred action other than "ask" (and optionally wl_data_offer.accept) before requesting wl_data_offer.finish, in order to convey the action selected by the user. If the preferred action is not in the wl_data_offer.source_actions mask, an error will be raised.

If the "ask" action is dismissed (e.g. user cancellation), the client is expected to perform wl_data_offer.destroy right away.

This request can only be made on drag-and-drop offers, a protocol error will be raised otherwise.

func (*DataOffer) SetID 

func (obj *DataOffer) SetID(id uint32)

func (*DataOffer) State 

func (obj *DataOffer) State() wire.State

func (*DataOffer) String 

func (obj *DataOffer) String() string

func (*DataOffer) Version 

func (obj *DataOffer) Version() uint32

type DataOfferError 

type DataOfferError int64
const (
	// finish request was called untimely
	DataOfferErrorInvalidFinish DataOfferError = 0

	// action mask contains invalid values
	DataOfferErrorInvalidActionMask DataOfferError = 1

	// action argument has an invalid value
	DataOfferErrorInvalidAction DataOfferError = 2

	// offer doesn't accept this request
	DataOfferErrorInvalidOffer DataOfferError = 3
)

func (DataOfferError) String 

func (enum DataOfferError) String() string

type DataOfferListener 

type DataOfferListener interface {
	// Sent immediately after creating the wl_data_offer object.  One
	// event per offered mime type.
	Offer(mimeType string)

	// This event indicates the actions offered by the data source. It
	// will be sent right after wl_data_device.enter, or anytime the source
	// side changes its offered actions through wl_data_source.set_actions.
	SourceActions(sourceActions DataDeviceManagerDndAction)

	// This event indicates the action selected by the compositor after
	// matching the source/destination side actions. Only one action (or
	// none) will be offered here.
	//
	// This event can be emitted multiple times during the drag-and-drop
	// operation in response to destination side action changes through
	// wl_data_offer.set_actions.
	//
	// This event will no longer be emitted after wl_data_device.drop
	// happened on the drag-and-drop destination, the client must
	// honor the last action received, or the last preferred one set
	// through wl_data_offer.set_actions when handling an "ask" action.
	//
	// Compositors may also change the selected action on the fly, mainly
	// in response to keyboard modifier changes during the drag-and-drop
	// operation.
	//
	// The most recent action received is always the valid one. Prior to
	// receiving wl_data_device.drop, the chosen action may change (e.g.
	// due to keyboard modifiers being pressed). At the time of receiving
	// wl_data_device.drop the drag-and-drop destination must honor the
	// last action received.
	//
	// Action changes may still happen after wl_data_device.drop,
	// especially on "ask" actions, where the drag-and-drop destination
	// may choose another action afterwards. Action changes happening
	// at this stage are always the result of inter-client negotiation, the
	// compositor shall no longer be able to induce a different action.
	//
	// Upon "ask" actions, it is expected that the drag-and-drop destination
	// may potentially choose a different action and/or mime type,
	// based on wl_data_offer.source_actions and finally chosen by the
	// user (e.g. popping up a menu with the available options). The
	// final wl_data_offer.set_actions and wl_data_offer.accept requests
	// must happen before the call to wl_data_offer.finish.
	Action(dndAction DataDeviceManagerDndAction)
}

DataOfferListener is a type that can respond to incoming messages for a DataOffer object.

type DataSource 

type DataSource struct {
	// Listener's methods are called by incoming messages from the
	// remote end via Dispatch. If it is nil, messages are silently
	// ignored.
	Listener DataSourceListener

	// OnDelete is called when the object is removed from the tracking
	// system.
	OnDelete func()
	// contains filtered or unexported fields
}

The wl_data_source object is the source side of a wl_data_offer. It is created by the source client in a data transfer and provides a way to describe the offered data and a way to respond to requests to transfer the data.

func NewDataSource 

func NewDataSource(state wire.State) *DataSource

NewDataSource returns a newly instantiated DataSource. It is primarily intended for use by generated code.

func (*DataSource) Delete 

func (obj *DataSource) Delete()

func (*DataSource) Destroy 

func (obj *DataSource) Destroy()

Destroy the data source.

func (*DataSource) Dispatch 

func (obj *DataSource) Dispatch(msg *wire.MessageBuffer) error

func (*DataSource) ID 

func (obj *DataSource) ID() uint32

func (*DataSource) Interface 

func (obj *DataSource) Interface() string

func (*DataSource) MethodName 

func (obj *DataSource) MethodName(op uint16) string

func (*DataSource) Offer 

func (obj *DataSource) Offer(mimeType string)

This request adds a mime type to the set of mime types advertised to targets. Can be called several times to offer multiple types.

func (*DataSource) SetActions 

func (obj *DataSource) SetActions(dndActions DataDeviceManagerDndAction)

Sets the actions that the source side client supports for this operation. This request may trigger wl_data_source.action and wl_data_offer.action events if the compositor needs to change the selected action.

The dnd_actions argument must contain only values expressed in the wl_data_device_manager.dnd_actions enum, otherwise it will result in a protocol error.

This request must be made once only, and can only be made on sources used in drag-and-drop, so it must be performed before wl_data_device.start_drag. Attempting to use the source other than for drag-and-drop will raise a protocol error.

func (*DataSource) SetID 

func (obj *DataSource) SetID(id uint32)

func (*DataSource) State 

func (obj *DataSource) State() wire.State

func (*DataSource) String 

func (obj *DataSource) String() string

func (*DataSource) Version 

func (obj *DataSource) Version() uint32

type DataSourceError 

type DataSourceError int64
const (
	// action mask contains invalid values
	DataSourceErrorInvalidActionMask DataSourceError = 0

	// source doesn't accept this request
	DataSourceErrorInvalidSource DataSourceError = 1
)

func (DataSourceError) String 

func (enum DataSourceError) String() string

type DataSourceListener 

type DataSourceListener interface {
	// Sent when a target accepts pointer_focus or motion events.  If
	// a target does not accept any of the offered types, type is NULL.
	//
	// Used for feedback during drag-and-drop.
	Target(mimeType string)

	// Request for data from the client.  Send the data as the
	// specified mime type over the passed file descriptor, then
	// close it.
	Send(mimeType string, fd *os.File)

	// This data source is no longer valid. There are several reasons why
	// this could happen:
	//
	// - The data source has been replaced by another data source.
	// - The drag-and-drop operation was performed, but the drop destination
	// did not accept any of the mime types offered through
	// wl_data_source.target.
	// - The drag-and-drop operation was performed, but the drop destination
	// did not select any of the actions present in the mask offered through
	// wl_data_source.action.
	// - The drag-and-drop operation was performed but didn't happen over a
	// surface.
	// - The compositor cancelled the drag-and-drop operation (e.g. compositor
	// dependent timeouts to avoid stale drag-and-drop transfers).
	//
	// The client should clean up and destroy this data source.
	//
	// For objects of version 2 or older, wl_data_source.cancelled will
	// only be emitted if the data source was replaced by another data
	// source.
	Cancelled()

	// The user performed the drop action. This event does not indicate
	// acceptance, wl_data_source.cancelled may still be emitted afterwards
	// if the drop destination does not accept any mime type.
	//
	// However, this event might however not be received if the compositor
	// cancelled the drag-and-drop operation before this event could happen.
	//
	// Note that the data_source may still be used in the future and should
	// not be destroyed here.
	DndDropPerformed()

	// The drop destination finished interoperating with this data
	// source, so the client is now free to destroy this data source and
	// free all associated data.
	//
	// If the action used to perform the operation was "move", the
	// source can now delete the transferred data.
	DndFinished()

	// This event indicates the action selected by the compositor after
	// matching the source/destination side actions. Only one action (or
	// none) will be offered here.
	//
	// This event can be emitted multiple times during the drag-and-drop
	// operation, mainly in response to destination side changes through
	// wl_data_offer.set_actions, and as the data device enters/leaves
	// surfaces.
	//
	// It is only possible to receive this event after
	// wl_data_source.dnd_drop_performed if the drag-and-drop operation
	// ended in an "ask" action, in which case the final wl_data_source.action
	// event will happen immediately before wl_data_source.dnd_finished.
	//
	// Compositors may also change the selected action on the fly, mainly
	// in response to keyboard modifier changes during the drag-and-drop
	// operation.
	//
	// The most recent action received is always the valid one. The chosen
	// action may change alongside negotiation (e.g. an "ask" action can turn
	// into a "move" operation), so the effects of the final action must
	// always be applied in wl_data_offer.dnd_finished.
	//
	// Clients can trigger cursor surface changes from this point, so
	// they reflect the current action.
	Action(dndAction DataDeviceManagerDndAction)
}

DataSourceListener is a type that can respond to incoming messages for a DataSource object.

type Display 

type Display struct {
	// Listener's methods are called by incoming messages from the
	// remote end via Dispatch. If it is nil, messages are silently
	// ignored.
	Listener DisplayListener

	// OnDelete is called when the object is removed from the tracking
	// system.
	OnDelete func()
	// contains filtered or unexported fields
}

The core global object. This is a special singleton object. It is used for internal Wayland protocol features.

func NewDisplay 

func NewDisplay(state wire.State) *Display

NewDisplay returns a newly instantiated Display. It is primarily intended for use by generated code.

func (*Display) Delete 

func (obj *Display) Delete()

func (*Display) Dispatch 

func (obj *Display) Dispatch(msg *wire.MessageBuffer) error

func (*Display) GetRegistry 

func (obj *Display) GetRegistry() (registry *Registry)

This request creates a registry object that allows the client to list and bind the global objects available from the compositor.

It should be noted that the server side resources consumed in response to a get_registry request can only be released when the client disconnects, not when the client side proxy is destroyed. Therefore, clients should invoke get_registry as infrequently as possible to avoid wasting memory.

func (*Display) ID 

func (obj *Display) ID() uint32

func (*Display) Interface 

func (obj *Display) Interface() string

func (*Display) MethodName 

func (obj *Display) MethodName(op uint16) string

func (*Display) SetID 

func (obj *Display) SetID(id uint32)

func (*Display) State 

func (obj *Display) State() wire.State

func (*Display) String 

func (obj *Display) String() string

func (*Display) Sync 

func (obj *Display) Sync() (callback *Callback)

The sync request asks the server to emit the 'done' event on the returned wl_callback object. Since requests are handled in-order and events are delivered in-order, this can be used as a barrier to ensure all previous requests and the resulting events have been handled.

The object returned by this request will be destroyed by the compositor after the callback is fired and as such the client must not attempt to use it after that point.

The callback_data passed in the callback is the event serial.

func (*Display) Version 

func (obj *Display) Version() uint32

type DisplayError 

type DisplayError int64

These errors are global and can be emitted in response to any server request. 

const (
	// server couldn't find object
	DisplayErrorInvalidObject DisplayError = 0

	// method doesn't exist on the specified interface or malformed request
	DisplayErrorInvalidMethod DisplayError = 1

	// server is out of memory
	DisplayErrorNoMemory DisplayError = 2

	// implementation error in compositor
	DisplayErrorImplementation DisplayError = 3
)

func (DisplayError) String 

func (enum DisplayError) String() string

type DisplayListener 

type DisplayListener interface {
	// The error event is sent out when a fatal (non-recoverable)
	// error has occurred.  The object_id argument is the object
	// where the error occurred, most often in response to a request
	// to that object.  The code identifies the error and is defined
	// by the object interface.  As such, each interface defines its
	// own set of error codes.  The message is a brief description
	// of the error, for (debugging) convenience.
	Error(objectId uint32, code uint32, message string)

	// This event is used internally by the object ID management
	// logic. When a client deletes an object that it had created,
	// the server will send this event to acknowledge that it has
	// seen the delete request. When the client receives this event,
	// it will know that it can safely reuse the object ID.
	DeleteId(id uint32)
}

DisplayListener is a type that can respond to incoming messages for a Display object.

type ImageBuffer 

type ImageBuffer struct {
	// contains filtered or unexported fields
}

func NewImageBuffer 

func NewImageBuffer(s *Shm, w, h int32) (buf *ImageBuffer, err error)

func (*ImageBuffer) Bounds 

func (s *ImageBuffer) Bounds() image.Rectangle

func (*ImageBuffer) Buffer 

func (s *ImageBuffer) Buffer() *Buffer

func (*ImageBuffer) Cap 

func (s *ImageBuffer) Cap() int32

func (*ImageBuffer) Destroy 

func (s *ImageBuffer) Destroy()

func (*ImageBuffer) Image 

func (s *ImageBuffer) Image() draw.Image

func (*ImageBuffer) Len 

func (s *ImageBuffer) Len() int32

func (*ImageBuffer) Resize 

func (s *ImageBuffer) Resize(w, h int32) error

func (*ImageBuffer) Shm 

func (s *ImageBuffer) Shm() *Shm

func (*ImageBuffer) ShmPool 

func (s *ImageBuffer) ShmPool() *ShmPool

func (*ImageBuffer) Stride 

func (s *ImageBuffer) Stride() int32

type Keyboard 

type Keyboard struct {
	// Listener's methods are called by incoming messages from the
	// remote end via Dispatch. If it is nil, messages are silently
	// ignored.
	Listener KeyboardListener

	// OnDelete is called when the object is removed from the tracking
	// system.
	OnDelete func()
	// contains filtered or unexported fields
}

The wl_keyboard interface represents one or more keyboards associated with a seat.

func NewKeyboard 

func NewKeyboard(state wire.State) *Keyboard

NewKeyboard returns a newly instantiated Keyboard. It is primarily intended for use by generated code.

func (*Keyboard) Delete 

func (obj *Keyboard) Delete()

func (*Keyboard) Dispatch 

func (obj *Keyboard) Dispatch(msg *wire.MessageBuffer) error

func (*Keyboard) ID 

func (obj *Keyboard) ID() uint32

func (*Keyboard) Interface 

func (obj *Keyboard) Interface() string

func (*Keyboard) MethodName 

func (obj *Keyboard) MethodName(op uint16) string

func (*Keyboard) Release 

func (obj *Keyboard) Release()

func (*Keyboard) SetID 

func (obj *Keyboard) SetID(id uint32)

func (*Keyboard) State 

func (obj *Keyboard) State() wire.State

func (*Keyboard) String 

func (obj *Keyboard) String() string

func (*Keyboard) Version 

func (obj *Keyboard) Version() uint32

type KeyboardKeyState 

type KeyboardKeyState int64

Describes the physical state of a key that produced the key event. 

const (
	// key is not pressed
	KeyboardKeyStateReleased KeyboardKeyState = 0

	// key is pressed
	KeyboardKeyStatePressed KeyboardKeyState = 1
)

func (KeyboardKeyState) String 

func (enum KeyboardKeyState) String() string

type KeyboardKeymapFormat 

type KeyboardKeymapFormat int64

This specifies the format of the keymap provided to the client with the wl_keyboard.keymap event. 

const (
	// no keymap; client must understand how to interpret the raw keycode
	KeyboardKeymapFormatNoKeymap KeyboardKeymapFormat = 0

	// libxkbcommon compatible; to determine the xkb keycode, clients must add 8 to the key event keycode
	KeyboardKeymapFormatXkbV1 KeyboardKeymapFormat = 1
)

func (KeyboardKeymapFormat) String 

func (enum KeyboardKeymapFormat) String() string

type KeyboardListener 

type KeyboardListener interface {
	// This event provides a file descriptor to the client which can be
	// memory-mapped to provide a keyboard mapping description.
	//
	// From version 7 onwards, the fd must be mapped with MAP_PRIVATE by
	// the recipient, as MAP_SHARED may fail.
	Keymap(format KeyboardKeymapFormat, fd *os.File, size uint32)

	// Notification that this seat's keyboard focus is on a certain
	// surface.
	//
	// The compositor must send the wl_keyboard.modifiers event after this
	// event.
	Enter(serial uint32, surface *Surface, keys []byte)

	// Notification that this seat's keyboard focus is no longer on
	// a certain surface.
	//
	// The leave notification is sent before the enter notification
	// for the new focus.
	//
	// After this event client must assume that all keys, including modifiers,
	// are lifted and also it must stop key repeating if there's some going on.
	Leave(serial uint32, surface *Surface)

	// A key was pressed or released.
	// The time argument is a timestamp with millisecond
	// granularity, with an undefined base.
	//
	// The key is a platform-specific key code that can be interpreted
	// by feeding it to the keyboard mapping (see the keymap event).
	//
	// If this event produces a change in modifiers, then the resulting
	// wl_keyboard.modifiers event must be sent after this event.
	Key(serial uint32, time uint32, key uint32, state KeyboardKeyState)

	// Notifies clients that the modifier and/or group state has
	// changed, and it should update its local state.
	Modifiers(serial uint32, modsDepressed uint32, modsLatched uint32, modsLocked uint32, group uint32)

	// Informs the client about the keyboard's repeat rate and delay.
	//
	// This event is sent as soon as the wl_keyboard object has been created,
	// and is guaranteed to be received by the client before any key press
	// event.
	//
	// Negative values for either rate or delay are illegal. A rate of zero
	// will disable any repeating (regardless of the value of delay).
	//
	// This event can be sent later on as well with a new value if necessary,
	// so clients should continue listening for the event past the creation
	// of wl_keyboard.
	RepeatInfo(rate int32, delay int32)
}

KeyboardListener is a type that can respond to incoming messages for a Keyboard object.

type Output 

type Output struct {
	// Listener's methods are called by incoming messages from the
	// remote end via Dispatch. If it is nil, messages are silently
	// ignored.
	Listener OutputListener

	// OnDelete is called when the object is removed from the tracking
	// system.
	OnDelete func()
	// contains filtered or unexported fields
}

An output describes part of the compositor geometry. The compositor works in the 'compositor coordinate system' and an output corresponds to a 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 monitor is hotplugged.

func BindOutput 

func BindOutput(state wire.State, registry wire.Binder, name, version uint32) *Output

func NewOutput 

func NewOutput(state wire.State) *Output

NewOutput returns a newly instantiated Output. It is primarily intended for use by generated code.

func (*Output) Delete 

func (obj *Output) Delete()

func (*Output) Dispatch 

func (obj *Output) Dispatch(msg *wire.MessageBuffer) error

func (*Output) ID 

func (obj *Output) ID() uint32

func (*Output) Interface 

func (obj *Output) Interface() string

func (*Output) MethodName 

func (obj *Output) MethodName(op uint16) string

func (*Output) Release 

func (obj *Output) Release()

Using this request a client can tell the server that it is not going to use the output object anymore.

func (*Output) SetID 

func (obj *Output) SetID(id uint32)

func (*Output) State 

func (obj *Output) State() wire.State

func (*Output) String 

func (obj *Output) String() string

func (*Output) Version 

func (obj *Output) Version() uint32

type OutputListener 

type OutputListener interface {
	// The geometry event describes geometric properties of the output.
	// The event is sent when binding to the output object and whenever
	// any of the properties change.
	//
	// The physical size can be set to zero if it doesn't make sense for this
	// output (e.g. for projectors or virtual outputs).
	//
	// Note: wl_output only advertises partial information about the output
	// position and identification. Some compositors, for instance those not
	// implementing a desktop-style output layout or those exposing virtual
	// outputs, might fake this information. Instead of using x and y, clients
	// should use xdg_output.logical_position. Instead of using make and model,
	// clients should use xdg_output.name and xdg_output.description.
	Geometry(x int32, y int32, physicalWidth int32, physicalHeight int32, subpixel OutputSubpixel, make string, model string, transform OutputTransform)

	// 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.
	//
	// Non-current modes are deprecated. A compositor can decide to only
	// advertise the current mode and never send other modes. Clients
	// should not rely on non-current modes.
	//
	// The size of a mode is given in physical hardware units of
	// the output device. This is not necessarily the same as
	// the output size in the global compositor space. For instance,
	// the output may be scaled, as described in wl_output.scale,
	// or transformed, as described in wl_output.transform. Clients
	// willing to retrieve the output size in the global compositor
	// space should use xdg_output.logical_size instead.
	//
	// The vertical refresh rate can be set to zero if it doesn't make
	// sense for this output (e.g. for virtual outputs).
	//
	// Clients should not use the refresh rate to schedule frames. Instead,
	// they should use the wl_surface.frame event or the presentation-time
	// protocol.
	//
	// Note: this information is not always meaningful for all outputs. Some
	// compositors, such as those exposing virtual outputs, might fake the
	// refresh rate or the size.
	Mode(flags OutputMode, width int32, height int32, refresh int32)

	// This event is sent after all other properties have been
	// sent after binding to the output object and after any
	// other property changes done after that. This allows
	// changes to the output properties to be seen as
	// atomic, even if they happen via multiple events.
	Done()

	// This event contains scaling geometry information
	// that is not in the geometry event. It may be sent after
	// binding the output object or if the output scale changes
	// later. If it is not sent, the client should assume a
	// scale of 1.
	//
	// A scale larger than 1 means that the compositor will
	// automatically scale surface buffers by this amount
	// when rendering. This is used for very high resolution
	// displays where applications rendering at the native
	// resolution would be too small to be legible.
	//
	// It is intended that scaling aware clients track the
	// current output of a surface, and if it is on a scaled
	// output it should use wl_surface.set_buffer_scale with
	// the scale of the output. That way the compositor can
	// avoid scaling the surface, and the client can supply
	// a higher detail image.
	Scale(factor int32)
}

OutputListener is a type that can respond to incoming messages for a Output object.

type OutputMode 

type OutputMode int64

These flags describe properties of an output mode. They are used in the flags bitfield of the mode event. 

const (
	// indicates this is the current mode
	OutputModeCurrent OutputMode = 1

	// indicates this is the preferred mode
	OutputModePreferred OutputMode = 2
)

func (OutputMode) String 

func (enum OutputMode) String() string

type OutputSubpixel 

type OutputSubpixel int64

This enumeration describes how the physical pixels on an output are laid out. 

const (
	// unknown geometry
	OutputSubpixelUnknown OutputSubpixel = 0

	// no geometry
	OutputSubpixelNone OutputSubpixel = 1

	// horizontal RGB
	OutputSubpixelHorizontalRgb OutputSubpixel = 2

	// horizontal BGR
	OutputSubpixelHorizontalBgr OutputSubpixel = 3

	// vertical RGB
	OutputSubpixelVerticalRgb OutputSubpixel = 4

	// vertical BGR
	OutputSubpixelVerticalBgr OutputSubpixel = 5
)

func (OutputSubpixel) String 

func (enum OutputSubpixel) String() string

type OutputTransform 

type OutputTransform int64

This describes the transform that a compositor will apply to a surface to compensate for the rotation or mirroring of an output device.

The flipped values correspond to an initial flip around a vertical axis followed by rotation.

The purpose is mainly to allow clients to render accordingly and tell the compositor, so that for fullscreen surfaces, the compositor will still be able to scan out directly from client surfaces. 

const (
	// no transform
	OutputTransformNormal OutputTransform = 0

	// 90 degrees counter-clockwise
	OutputTransform90 OutputTransform = 1

	// 180 degrees counter-clockwise
	OutputTransform180 OutputTransform = 2

	// 270 degrees counter-clockwise
	OutputTransform270 OutputTransform = 3

	// 180 degree flip around a vertical axis
	OutputTransformFlipped OutputTransform = 4

	// flip and rotate 90 degrees counter-clockwise
	OutputTransformFlipped90 OutputTransform = 5

	// flip and rotate 180 degrees counter-clockwise
	OutputTransformFlipped180 OutputTransform = 6

	// flip and rotate 270 degrees counter-clockwise
	OutputTransformFlipped270 OutputTransform = 7
)

func (OutputTransform) String 

func (enum OutputTransform) String() string

type Pointer 

type Pointer struct {
	// Listener's methods are called by incoming messages from the
	// remote end via Dispatch. If it is nil, messages are silently
	// ignored.
	Listener PointerListener

	// OnDelete is called when the object is removed from the tracking
	// system.
	OnDelete func()
	// contains filtered or unexported fields
}

The wl_pointer interface represents one or more input devices, such as mice, which control the pointer location and pointer_focus of a seat.

The wl_pointer interface generates motion, enter and leave events for the surfaces that the pointer is located over, and button and axis events for button presses, button releases and scrolling.

func NewPointer 

func NewPointer(state wire.State) *Pointer

NewPointer returns a newly instantiated Pointer. It is primarily intended for use by generated code.

func (*Pointer) Delete 

func (obj *Pointer) Delete()

func (*Pointer) Dispatch 

func (obj *Pointer) Dispatch(msg *wire.MessageBuffer) error

func (*Pointer) ID 

func (obj *Pointer) ID() uint32

func (*Pointer) Interface 

func (obj *Pointer) Interface() string

func (*Pointer) MethodName 

func (obj *Pointer) MethodName(op uint16) string

func (*Pointer) Release 

func (obj *Pointer) Release()

Using this request a client can tell the server that it is not going to use the pointer object anymore.

This request destroys the pointer proxy object, so clients must not call wl_pointer_destroy() after using this request.

func (*Pointer) SetCursor 

func (obj *Pointer) SetCursor(serial uint32, surface *Surface, hotspotX int32, hotspotY int32)

Set the pointer surface, i.e., the surface that contains the pointer image (cursor). This request gives the surface the role of a cursor. If the surface already has another role, it raises a protocol error.

The cursor actually changes only if the pointer focus for this device is one of the requesting client's 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, in surface-local coordinates.

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. Attach must be confirmed by wl_surface.commit as usual.

The hotspot can also be updated by passing the currently set pointer surface to this request with new values for hotspot_x and hotspot_y.

The current and pending input regions of the wl_surface are cleared, and wl_surface.set_input_region is ignored until the wl_surface is no longer used as the cursor. When the use as a cursor ends, the current and pending input regions become undefined, and the wl_surface is unmapped.

func (*Pointer) SetID 

func (obj *Pointer) SetID(id uint32)

func (*Pointer) State 

func (obj *Pointer) State() wire.State

func (*Pointer) String 

func (obj *Pointer) String() string

func (*Pointer) Version 

func (obj *Pointer) Version() uint32

type PointerAxis 

type PointerAxis int64

Describes the axis types of scroll events. 

const (
	// vertical axis
	PointerAxisVerticalScroll PointerAxis = 0

	// horizontal axis
	PointerAxisHorizontalScroll PointerAxis = 1
)

func (PointerAxis) String 

func (enum PointerAxis) String() string

type PointerAxisSource 

type PointerAxisSource int64

Describes the source types for axis events. This indicates to the client how an axis event was physically generated; a client may adjust the user interface accordingly. For example, scroll events from a "finger" source may be in a smooth coordinate space with kinetic scrolling whereas a "wheel" source may be in discrete steps of a number of lines.

The "continuous" axis source is a device generating events in a continuous coordinate space, but using something other than a finger. One example for this source is button-based scrolling where the vertical motion of a device is converted to scroll events while a button is held down.

The "wheel tilt" axis source indicates that the actual device is a wheel but the scroll event is not caused by a rotation but a (usually sideways) tilt of the wheel. 

const (
	// a physical wheel rotation
	PointerAxisSourceWheel PointerAxisSource = 0

	// finger on a touch surface
	PointerAxisSourceFinger PointerAxisSource = 1

	// continuous coordinate space
	PointerAxisSourceContinuous PointerAxisSource = 2

	// a physical wheel tilt
	PointerAxisSourceWheelTilt PointerAxisSource = 3
)

func (PointerAxisSource) String 

func (enum PointerAxisSource) String() string

type PointerButtonState 

type PointerButtonState int64

Describes the physical state of a button that produced the button event. 

const (
	// the button is not pressed
	PointerButtonStateReleased PointerButtonState = 0

	// the button is pressed
	PointerButtonStatePressed PointerButtonState = 1
)

func (PointerButtonState) String 

func (enum PointerButtonState) String() string

type PointerError 

type PointerError int64
const (
	// given wl_surface has another role
	PointerErrorRole PointerError = 0
)

func (PointerError) String 

func (enum PointerError) String() string

type PointerListener 

type PointerListener interface {
	// Notification that this seat's pointer is focused on a certain
	// surface.
	//
	// When a 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 with the set_cursor request.
	Enter(serial uint32, surface *Surface, surfaceX wire.Fixed, surfaceY wire.Fixed)

	// Notification that this seat's pointer is no longer focused on
	// a certain surface.
	//
	// The leave notification is sent before the enter notification
	// for the new focus.
	Leave(serial uint32, surface *Surface)

	// Notification of pointer location change. The arguments
	// surface_x and surface_y are the location relative to the
	// focused surface.
	Motion(time uint32, surfaceX wire.Fixed, surfaceY wire.Fixed)

	// Mouse button click and release notifications.
	//
	// The location of the click is given by the last motion or
	// enter event.
	// The time argument is a timestamp with millisecond
	// granularity, with an undefined base.
	//
	// The button is a button code as defined in the Linux kernel's
	// linux/input-event-codes.h header file, e.g. BTN_LEFT.
	//
	// Any 16-bit button code value is reserved for future additions to the
	// kernel's event code list. All other button codes above 0xFFFF are
	// currently undefined but may be used in future versions of this
	// protocol.
	Button(serial uint32, time uint32, button uint32, state PointerButtonState)

	// Scroll and other axis notifications.
	//
	// For scroll events (vertical and horizontal scroll axes), the
	// value parameter is the length of a vector along the specified
	// axis in a coordinate space identical to those of motion events,
	// representing a relative movement along the specified axis.
	//
	// For devices that support movements non-parallel to axes multiple
	// axis events will be emitted.
	//
	// When applicable, for example for touch pads, the server can
	// choose to emit scroll events where the motion vector is
	// equivalent to a motion event vector.
	//
	// When applicable, a client can transform its content relative to the
	// scroll distance.
	Axis(time uint32, axis PointerAxis, value wire.Fixed)

	// Indicates the end of a set of events that logically belong together.
	// A client is expected to accumulate the data in all events within the
	// frame before proceeding.
	//
	// All wl_pointer events before a wl_pointer.frame event belong
	// logically together. For example, in a diagonal scroll motion the
	// compositor will send an optional wl_pointer.axis_source event, two
	// wl_pointer.axis events (horizontal and vertical) and finally a
	// wl_pointer.frame event. The client may use this information to
	// calculate a diagonal vector for scrolling.
	//
	// When multiple wl_pointer.axis events occur within the same frame,
	// the motion vector is the combined motion of all events.
	// When a wl_pointer.axis and a wl_pointer.axis_stop event occur within
	// the same frame, this indicates that axis movement in one axis has
	// stopped but continues in the other axis.
	// When multiple wl_pointer.axis_stop events occur within the same
	// frame, this indicates that these axes stopped in the same instance.
	//
	// A wl_pointer.frame event is sent for every logical event group,
	// even if the group only contains a single wl_pointer event.
	// Specifically, a client may get a sequence: motion, frame, button,
	// frame, axis, frame, axis_stop, frame.
	//
	// The wl_pointer.enter and wl_pointer.leave events are logical events
	// generated by the compositor and not the hardware. These events are
	// also grouped by a wl_pointer.frame. When a pointer moves from one
	// surface to another, a compositor should group the
	// wl_pointer.leave event within the same wl_pointer.frame.
	// However, a client must not rely on wl_pointer.leave and
	// wl_pointer.enter being in the same wl_pointer.frame.
	// Compositor-specific policies may require the wl_pointer.leave and
	// wl_pointer.enter event being split across multiple wl_pointer.frame
	// groups.
	Frame()

	// Source information for scroll and other axes.
	//
	// This event does not occur on its own. It is sent before a
	// wl_pointer.frame event and carries the source information for
	// all events within that frame.
	//
	// The source specifies how this event was generated. If the source is
	// wl_pointer.axis_source.finger, a wl_pointer.axis_stop event will be
	// sent when the user lifts the finger off the device.
	//
	// If the source is wl_pointer.axis_source.wheel,
	// wl_pointer.axis_source.wheel_tilt or
	// wl_pointer.axis_source.continuous, a wl_pointer.axis_stop event may
	// or may not be sent. Whether a compositor sends an axis_stop event
	// for these sources is hardware-specific and implementation-dependent;
	// clients must not rely on receiving an axis_stop event for these
	// scroll sources and should treat scroll sequences from these scroll
	// sources as unterminated by default.
	//
	// This event is optional. If the source is unknown for a particular
	// axis event sequence, no event is sent.
	// Only one wl_pointer.axis_source event is permitted per frame.
	//
	// The order of wl_pointer.axis_discrete and wl_pointer.axis_source is
	// not guaranteed.
	AxisSource(axisSource PointerAxisSource)

	// Stop notification for scroll and other axes.
	//
	// For some wl_pointer.axis_source types, a wl_pointer.axis_stop event
	// is sent to notify a client that the axis sequence has terminated.
	// This enables the client to implement kinetic scrolling.
	// See the wl_pointer.axis_source documentation for information on when
	// this event may be generated.
	//
	// Any wl_pointer.axis events with the same axis_source after this
	// event should be considered as the start of a new axis motion.
	//
	// The timestamp is to be interpreted identical to the timestamp in the
	// wl_pointer.axis event. The timestamp value may be the same as a
	// preceding wl_pointer.axis event.
	AxisStop(time uint32, axis PointerAxis)

	// Discrete step information for scroll and other axes.
	//
	// This event carries the axis value of the wl_pointer.axis event in
	// discrete steps (e.g. mouse wheel clicks).
	//
	// This event does not occur on its own, it is coupled with a
	// wl_pointer.axis event that represents this axis value on a
	// continuous scale. The protocol guarantees that each axis_discrete
	// event is always followed by exactly one axis event with the same
	// axis number within the same wl_pointer.frame. Note that the protocol
	// allows for other events to occur between the axis_discrete and
	// its coupled axis event, including other axis_discrete or axis
	// events.
	//
	// This event is optional; continuous scrolling devices
	// like two-finger scrolling on touchpads do not have discrete
	// steps and do not generate this event.
	//
	// The discrete value carries the directional information. e.g. a value
	// of -2 is two steps towards the negative direction of this axis.
	//
	// The axis number is identical to the axis number in the associated
	// axis event.
	//
	// The order of wl_pointer.axis_discrete and wl_pointer.axis_source is
	// not guaranteed.
	AxisDiscrete(axis PointerAxis, discrete int32)
}

PointerListener is a type that can respond to incoming messages for a Pointer object.

type Region 

type Region struct {

	// OnDelete is called when the object is removed from the tracking
	// system.
	OnDelete func()
	// contains filtered or unexported fields
}

A region object describes an area.

Region objects are used to describe the opaque and input regions of a surface.

func NewRegion 

func NewRegion(state wire.State) *Region

NewRegion returns a newly instantiated Region. It is primarily intended for use by generated code.

func (*Region) Add 

func (obj *Region) Add(x int32, y int32, width int32, height int32)

Add the specified rectangle to the region.

func (*Region) Delete 

func (obj *Region) Delete()

func (*Region) Destroy 

func (obj *Region) Destroy()

Destroy the region. This will invalidate the object ID.

func (*Region) Dispatch 

func (obj *Region) Dispatch(msg *wire.MessageBuffer) error

func (*Region) ID 

func (obj *Region) ID() uint32

func (*Region) Interface 

func (obj *Region) Interface() string

func (*Region) MethodName 

func (obj *Region) MethodName(op uint16) string

func (*Region) SetID 

func (obj *Region) SetID(id uint32)

func (*Region) State 

func (obj *Region) State() wire.State

func (*Region) String 

func (obj *Region) String() string

func (*Region) Subtract 

func (obj *Region) Subtract(x int32, y int32, width int32, height int32)

Subtract the specified rectangle from the region.

func (*Region) Version 

func (obj *Region) Version() uint32

type Registry 

type Registry struct {
	// Listener's methods are called by incoming messages from the
	// remote end via Dispatch. If it is nil, messages are silently
	// ignored.
	Listener RegistryListener

	// OnDelete is called when the object is removed from the tracking
	// system.
	OnDelete func()
	// contains filtered or unexported fields
}

The singleton global registry object. The server has a number of global objects that are available to all clients. These objects typically represent an actual object in the server (for example, an input device) or they are singleton objects that provide extension functionality.

When a client creates a registry object, the registry object will emit a global event for each global currently in the registry. Globals come and go as a result of device or monitor hotplugs, reconfiguration or other events, and the registry will send out global and global_remove events to keep the client up to date with the changes. To mark the end of the initial burst of events, the client can use the wl_display.sync request immediately after calling wl_display.get_registry.

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.

func NewRegistry 

func NewRegistry(state wire.State) *Registry

NewRegistry returns a newly instantiated Registry. It is primarily intended for use by generated code.

func (*Registry) Bind 

func (obj *Registry) Bind(name uint32, id wire.NewID)

Binds a new, client-created object to the server using the specified name as the identifier.

func (*Registry) Delete 

func (obj *Registry) Delete()

func (*Registry) Dispatch 

func (obj *Registry) Dispatch(msg *wire.MessageBuffer) error

func (*Registry) ID 

func (obj *Registry) ID() uint32

func (*Registry) Interface 

func (obj *Registry) Interface() string

func (*Registry) MethodName 

func (obj *Registry) MethodName(op uint16) string

func (*Registry) SetID 

func (obj *Registry) SetID(id uint32)

func (*Registry) State 

func (obj *Registry) State() wire.State

func (*Registry) String 

func (obj *Registry) String() string

func (*Registry) Version 

func (obj *Registry) Version() uint32

type RegistryListener 

type RegistryListener interface {
	// Notify the client of global objects.
	//
	// The event notifies the client that a global object with
	// the given name is now available, and it implements the
	// given version of the given interface.
	Global(name uint32, _interface string, version uint32)

	// Notify the client of removed global objects.
	//
	// This event notifies the client that the global identified
	// by name is no longer available.  If the client bound to
	// the global using the bind request, the client should now
	// destroy that object.
	//
	// The object remains valid and requests to the object will be
	// ignored until the client destroys it, to avoid races between
	// the global going away and a client sending a request to it.
	GlobalRemove(name uint32)
}

RegistryListener is a type that can respond to incoming messages for a Registry object.

type Seat 

type Seat struct {
	// Listener's methods are called by incoming messages from the
	// remote end via Dispatch. If it is nil, messages are silently
	// ignored.
	Listener SeatListener

	// OnDelete is called when the object is removed from the tracking
	// system.
	OnDelete func()
	// contains filtered or unexported fields
}

A seat is a group of keyboards, pointer 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.

func BindSeat 

func BindSeat(state wire.State, registry wire.Binder, name, version uint32) *Seat

func NewSeat 

func NewSeat(state wire.State) *Seat

NewSeat returns a newly instantiated Seat. It is primarily intended for use by generated code.

func (*Seat) Delete 

func (obj *Seat) Delete()

func (*Seat) Dispatch 

func (obj *Seat) Dispatch(msg *wire.MessageBuffer) error

func (*Seat) GetKeyboard 

func (obj *Seat) GetKeyboard() (id *Keyboard)

The ID provided will be initialized to the wl_keyboard interface for this seat.

This request only takes effect if the seat has the keyboard capability, or has had the keyboard capability in the past. It is a protocol violation to issue this request on a seat that has never had the keyboard capability. The missing_capability error will be sent in this case.

func (*Seat) GetPointer 

func (obj *Seat) GetPointer() (id *Pointer)

The ID provided will be initialized to the wl_pointer interface for this seat.

This request only takes effect if the seat has the pointer capability, or has had the pointer capability in the past. It is a protocol violation to issue this request on a seat that has never had the pointer capability. The missing_capability error will be sent in this case.

func (*Seat) GetTouch 

func (obj *Seat) GetTouch() (id *Touch)

The ID provided will be initialized to the wl_touch interface for this seat.

This request only takes effect if the seat has the touch capability, or has had the touch capability in the past. It is a protocol violation to issue this request on a seat that has never had the touch capability. The missing_capability error will be sent in this case.

func (*Seat) ID 

func (obj *Seat) ID() uint32

func (*Seat) Interface 

func (obj *Seat) Interface() string

func (*Seat) MethodName 

func (obj *Seat) MethodName(op uint16) string

func (*Seat) Release 

func (obj *Seat) Release()

Using this request a client can tell the server that it is not going to use the seat object anymore.

func (*Seat) SetID 

func (obj *Seat) SetID(id uint32)

func (*Seat) State 

func (obj *Seat) State() wire.State

func (*Seat) String 

func (obj *Seat) String() string

func (*Seat) Version 

func (obj *Seat) Version() uint32

type SeatCapability 

type SeatCapability int64

This is a bitmask of capabilities this seat has; if a member is set, then it is present on the seat. 

const (
	// the seat has pointer devices
	SeatCapabilityPointer SeatCapability = 1

	// the seat has one or more keyboards
	SeatCapabilityKeyboard SeatCapability = 2

	// the seat has touch devices
	SeatCapabilityTouch SeatCapability = 4
)

func (SeatCapability) String 

func (enum SeatCapability) String() string

type SeatError 

type SeatError int64

These errors can be emitted in response to wl_seat requests. 

const (
	// get_pointer, get_keyboard or get_touch called on seat without the matching capability
	SeatErrorMissingCapability SeatError = 0
)

func (SeatError) String 

func (enum SeatError) String() string

type SeatListener 

type SeatListener interface {
	// This is emitted whenever a seat gains or loses the pointer,
	// keyboard or touch capabilities.  The argument is a capability
	// enum containing the complete set of capabilities this seat has.
	//
	// When the pointer capability is added, a client may create a
	// wl_pointer object using the wl_seat.get_pointer request. This object
	// will receive pointer events until the capability is removed in the
	// future.
	//
	// When the pointer capability is removed, a client should destroy the
	// wl_pointer objects associated with the seat where the capability was
	// removed, using the wl_pointer.release request. No further pointer
	// events will be received on these objects.
	//
	// In some compositors, if a seat regains the pointer capability and a
	// client has a previously obtained wl_pointer object of version 4 or
	// less, that object may start sending pointer events again. This
	// behavior is considered a misinterpretation of the intended behavior
	// and must not be relied upon by the client. wl_pointer objects of
	// version 5 or later must not send events if created before the most
	// recent event notifying the client of an added pointer capability.
	//
	// The above behavior also applies to wl_keyboard and wl_touch with the
	// keyboard and touch capabilities, respectively.
	Capabilities(capabilities SeatCapability)

	// In a multiseat configuration this can be used by the client to help
	// identify which physical devices the seat represents. Based on
	// the seat configuration used by the compositor.
	Name(name string)
}

SeatListener is a type that can respond to incoming messages for a Seat object.

type Shell 

type Shell struct {

	// OnDelete is called when the object is removed from the tracking
	// system.
	OnDelete func()
	// contains filtered or unexported fields
}

This interface is implemented by servers that provide desktop-style user interfaces.

It allows clients to associate a wl_shell_surface with a basic surface.

Note! This protocol is deprecated and not intended for production use. For desktop-style user interfaces, use xdg_shell.

func BindShell 

func BindShell(state wire.State, registry wire.Binder, name, version uint32) *Shell

func NewShell 

func NewShell(state wire.State) *Shell

NewShell returns a newly instantiated Shell. It is primarily intended for use by generated code.

func (*Shell) Delete 

func (obj *Shell) Delete()

func (*Shell) Dispatch 

func (obj *Shell) Dispatch(msg *wire.MessageBuffer) error

func (*Shell) GetShellSurface 

func (obj *Shell) GetShellSurface(surface *Surface) (id *ShellSurface)

Create a shell surface for an existing surface. This gives the wl_surface the role of a shell surface. If the wl_surface already has another role, it raises a protocol error.

Only one shell surface can be associated with a given surface.

func (*Shell) ID 

func (obj *Shell) ID() uint32

func (*Shell) Interface 

func (obj *Shell) Interface() string

func (*Shell) MethodName 

func (obj *Shell) MethodName(op uint16) string

func (*Shell) SetID 

func (obj *Shell) SetID(id uint32)

func (*Shell) State 

func (obj *Shell) State() wire.State

func (*Shell) String 

func (obj *Shell) String() string

func (*Shell) Version 

func (obj *Shell) Version() uint32

type ShellError 

type ShellError int64
const (
	// given wl_surface has another role
	ShellErrorRole ShellError = 0
)

func (ShellError) String 

func (enum ShellError) String() string

type ShellSurface 

type ShellSurface struct {
	// Listener's methods are called by incoming messages from the
	// remote end via Dispatch. If it is nil, messages are silently
	// ignored.
	Listener ShellSurfaceListener

	// OnDelete is called when the object is removed from the tracking
	// system.
	OnDelete func()
	// contains filtered or unexported fields
}

An interface that may be implemented by a wl_surface, for implementations that provide a desktop-style user interface.

It provides requests to treat surfaces like toplevel, fullscreen or popup windows, move, resize or maximize them, associate metadata like title and class, etc.

On the server side the object is automatically destroyed when the related wl_surface is destroyed. On the client side, wl_shell_surface_destroy() must be called before destroying the wl_surface object.

func NewShellSurface 

func NewShellSurface(state wire.State) *ShellSurface

NewShellSurface returns a newly instantiated ShellSurface. It is primarily intended for use by generated code.

func (*ShellSurface) Delete 

func (obj *ShellSurface) Delete()

func (*ShellSurface) Dispatch 

func (obj *ShellSurface) Dispatch(msg *wire.MessageBuffer) error

func (*ShellSurface) ID 

func (obj *ShellSurface) ID() uint32

func (*ShellSurface) Interface 

func (obj *ShellSurface) Interface() string

func (*ShellSurface) MethodName 

func (obj *ShellSurface) MethodName(op uint16) string

func (*ShellSurface) Move 

func (obj *ShellSurface) Move(seat *Seat, serial uint32)

Start a pointer-driven move of the surface.

This request must be used in response to a button press event. The server may ignore move requests depending on the state of the surface (e.g. fullscreen or maximized).

func (*ShellSurface) Pong 

func (obj *ShellSurface) Pong(serial uint32)

A client must respond to a ping event with a pong request or the client may be deemed unresponsive.

func (*ShellSurface) Resize 

func (obj *ShellSurface) Resize(seat *Seat, serial uint32, edges ShellSurfaceResize)

Start a pointer-driven resizing of the surface.

This request must be used in response to a button press event. The server may ignore resize requests depending on the state of the surface (e.g. fullscreen or maximized).

func (*ShellSurface) SetClass 

func (obj *ShellSurface) SetClass(class string)

Set a class for the surface.

The surface class identifies the general class of applications to which the surface belongs. A common convention is to use the file name (or the full path if it is a non-standard location) of the application's .desktop file as the class.

func (*ShellSurface) SetFullscreen 

func (obj *ShellSurface) SetFullscreen(method ShellSurfaceFullscreenMethod, framerate uint32, output *Output)

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 method parameter.

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

A method of "scale" or "driver" implies a scaling operation of the surface, either via a direct scaling operation or a change of the output mode. This will override any kind of output scaling, so that mapping a surface with a buffer size equal to the mode can fill the screen independent of buffer_scale.

A method of "fill" means we don't scale up the buffer, however any output scale is applied. This means that you may run into an edge case where the application maps a buffer with the same size of the output mode but buffer_scale 1 (thus making a surface larger than the output). In this case it is allowed to downscale the results to fit the screen.

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.

func (*ShellSurface) SetID 

func (obj *ShellSurface) SetID(id uint32)

func (*ShellSurface) SetMaximized 

func (obj *ShellSurface) SetMaximized(output *Output)

Map the surface as a maximized surface.

If an output parameter is given then the surface will be maximized 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 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 surface typically fills the entire output it is bound to, except for desktop elements such as panels. This is the main difference between a maximized shell surface and a fullscreen shell surface.

The details depend on the compositor implementation.

func (*ShellSurface) SetPopup 

func (obj *ShellSurface) SetPopup(seat *Seat, serial uint32, parent *Surface, x int32, y int32, flags ShellSurfaceTransient)

Map the surface as a popup.

A popup surface is a transient surface with an added pointer grab.

An existing implicit grab will be changed to owner-events mode, and the popup grab will continue after the implicit grab ends (i.e. releasing the mouse button does not cause the popup to be unmapped).

The popup grab continues until the window is destroyed or a mouse button is pressed in any other client's window. A click in any of the client's surfaces is reported as normal, however, clicks in other clients' surfaces will be discarded and trigger the callback.

The x and y arguments specify the location of the upper left corner of the surface relative to the upper left corner of the parent surface, in surface-local coordinates.

func (*ShellSurface) SetTitle 

func (obj *ShellSurface) SetTitle(title string)

Set a short title for the surface.

This string may be used to identify the surface in a task bar, window list, or other user interface elements provided by the compositor.

The string must be encoded in UTF-8.

func (*ShellSurface) SetToplevel 

func (obj *ShellSurface) SetToplevel()

Map the surface as a toplevel surface.

A toplevel surface is not fullscreen, maximized or transient.

func (*ShellSurface) SetTransient 

func (obj *ShellSurface) SetTransient(parent *Surface, x int32, y int32, flags ShellSurfaceTransient)

Map the surface relative to an existing surface.

The x and y arguments specify the location of the upper left corner of the surface relative to the upper left corner of the parent surface, in surface-local coordinates.

The flags argument controls details of the transient behaviour.

func (*ShellSurface) State 

func (obj *ShellSurface) State() wire.State

func (*ShellSurface) String 

func (obj *ShellSurface) String() string

func (*ShellSurface) Version 

func (obj *ShellSurface) Version() uint32

type ShellSurfaceFullscreenMethod 

type ShellSurfaceFullscreenMethod int64

Hints to indicate to the compositor how to deal with a conflict between the dimensions of the surface and the dimensions of the output. The compositor is free to ignore this parameter. 

const (
	// no preference, apply default policy
	ShellSurfaceFullscreenMethodDefault ShellSurfaceFullscreenMethod = 0

	// scale, preserve the surface's aspect ratio and center on output
	ShellSurfaceFullscreenMethodScale ShellSurfaceFullscreenMethod = 1

	// switch output mode to the smallest mode that can fit the surface, add black borders to compensate size mismatch
	ShellSurfaceFullscreenMethodDriver ShellSurfaceFullscreenMethod = 2

	// no upscaling, center on output and add black borders to compensate size mismatch
	ShellSurfaceFullscreenMethodFill ShellSurfaceFullscreenMethod = 3
)

func (ShellSurfaceFullscreenMethod) String 

func (enum ShellSurfaceFullscreenMethod) String() string

type ShellSurfaceListener 

type ShellSurfaceListener interface {
	// Ping a client to check if it is receiving events and sending
	// requests. A client is expected to reply with a pong request.
	Ping(serial uint32)

	// 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 ratio or resize in steps of NxM pixels).
	//
	// The edges parameter provides a hint about how the surface
	// was resized. The client may use this information to decide
	// how to adjust its content to the new size (e.g. a scrolling
	// area might adjust its content position to leave the viewable
	// content unmoved).
	//
	// The client is free to dismiss all but the last configure
	// event it received.
	//
	// The width and height arguments specify the size of the window
	// in surface-local coordinates.
	Configure(edges ShellSurfaceResize, width int32, height int32)

	// The popup_done event is sent out when a popup grab is broken,
	// that is, when the user clicks a surface that doesn't belong
	// to the client owning the popup surface.
	PopupDone()
}

ShellSurfaceListener is a type that can respond to incoming messages for a ShellSurface object.

type ShellSurfaceResize 

type ShellSurfaceResize int64

These values are used to indicate which edge of a surface is being dragged in a resize operation. The server may use this information to adapt its behavior, e.g. choose an appropriate cursor image. 

const (
	// no edge
	ShellSurfaceResizeNone ShellSurfaceResize = 0

	// top edge
	ShellSurfaceResizeTop ShellSurfaceResize = 1

	// bottom edge
	ShellSurfaceResizeBottom ShellSurfaceResize = 2

	// left edge
	ShellSurfaceResizeLeft ShellSurfaceResize = 4

	// top and left edges
	ShellSurfaceResizeTopLeft ShellSurfaceResize = 5

	// bottom and left edges
	ShellSurfaceResizeBottomLeft ShellSurfaceResize = 6

	// right edge
	ShellSurfaceResizeRight ShellSurfaceResize = 8

	// top and right edges
	ShellSurfaceResizeTopRight ShellSurfaceResize = 9

	// bottom and right edges
	ShellSurfaceResizeBottomRight ShellSurfaceResize = 10
)

func (ShellSurfaceResize) String 

func (enum ShellSurfaceResize) String() string

type ShellSurfaceTransient 

type ShellSurfaceTransient int64

These flags specify details of the expected behaviour of transient surfaces. Used in the set_transient request. 

const (
	// do not set keyboard focus
	ShellSurfaceTransientInactive ShellSurfaceTransient = 1
)

func (ShellSurfaceTransient) String 

func (enum ShellSurfaceTransient) String() string

type Shm 

type Shm struct {
	// Listener's methods are called by incoming messages from the
	// remote end via Dispatch. If it is nil, messages are silently
	// ignored.
	Listener ShmListener

	// OnDelete is called when the object is removed from the tracking
	// system.
	OnDelete func()
	// contains filtered or unexported fields
}

A singleton global object that provides support for shared memory.

Clients can create wl_shm_pool objects using the create_pool request.

At connection setup time, the wl_shm object emits one or more format events to inform clients about the valid pixel formats that can be used for buffers.

func BindShm 

func BindShm(state wire.State, registry wire.Binder, name, version uint32) *Shm

func NewShm 

func NewShm(state wire.State) *Shm

NewShm returns a newly instantiated Shm. It is primarily intended for use by generated code.

func (*Shm) CreatePool 

func (obj *Shm) CreatePool(fd *os.File, size int32) (id *ShmPool)

Create a new wl_shm_pool object.

The pool can be used to create shared memory based buffer objects. The server will mmap size bytes of the passed file descriptor, to use as backing memory for the pool.

func (*Shm) Delete 

func (obj *Shm) Delete()

func (*Shm) Dispatch 

func (obj *Shm) Dispatch(msg *wire.MessageBuffer) error

func (*Shm) ID 

func (obj *Shm) ID() uint32

func (*Shm) Interface 

func (obj *Shm) Interface() string

func (*Shm) MethodName 

func (obj *Shm) MethodName(op uint16) string

func (*Shm) SetID 

func (obj *Shm) SetID(id uint32)

func (*Shm) State 

func (obj *Shm) State() wire.State

func (*Shm) String 

func (obj *Shm) String() string

func (*Shm) Version 

func (obj *Shm) Version() uint32

type ShmError 

type ShmError int64

These errors can be emitted in response to wl_shm requests. 

const (
	// buffer format is not known
	ShmErrorInvalidFormat ShmError = 0

	// invalid size or stride during pool or buffer creation
	ShmErrorInvalidStride ShmError = 1

	// mmapping the file descriptor failed
	ShmErrorInvalidFd ShmError = 2
)

func (ShmError) String 

func (enum ShmError) String() string

type ShmFormat 

type ShmFormat int64

This describes the memory layout of an individual pixel.

All renderers should support argb8888 and xrgb8888 but any other formats are optional and may not be supported by the particular renderer in use.

The drm format codes match the macros defined in drm_fourcc.h, except argb8888 and xrgb8888. The formats actually supported by the compositor will be reported by the format event. 

const (
	// 32-bit ARGB format, [31:0] A:R:G:B 8:8:8:8 little endian
	ShmFormatArgb8888 ShmFormat = 0

	// 32-bit RGB format, [31:0] x:R:G:B 8:8:8:8 little endian
	ShmFormatXrgb8888 ShmFormat = 1

	// 8-bit color index format, [7:0] C
	ShmFormatC8 ShmFormat = 538982467

	// 8-bit RGB format, [7:0] R:G:B 3:3:2
	ShmFormatRgb332 ShmFormat = 943867730

	// 8-bit BGR format, [7:0] B:G:R 2:3:3
	ShmFormatBgr233 ShmFormat = 944916290

	// 16-bit xRGB format, [15:0] x:R:G:B 4:4:4:4 little endian
	ShmFormatXrgb4444 ShmFormat = 842093144

	// 16-bit xBGR format, [15:0] x:B:G:R 4:4:4:4 little endian
	ShmFormatXbgr4444 ShmFormat = 842089048

	// 16-bit RGBx format, [15:0] R:G:B:x 4:4:4:4 little endian
	ShmFormatRgbx4444 ShmFormat = 842094674

	// 16-bit BGRx format, [15:0] B:G:R:x 4:4:4:4 little endian
	ShmFormatBgrx4444 ShmFormat = 842094658

	// 16-bit ARGB format, [15:0] A:R:G:B 4:4:4:4 little endian
	ShmFormatArgb4444 ShmFormat = 842093121

	// 16-bit ABGR format, [15:0] A:B:G:R 4:4:4:4 little endian
	ShmFormatAbgr4444 ShmFormat = 842089025

	// 16-bit RBGA format, [15:0] R:G:B:A 4:4:4:4 little endian
	ShmFormatRgba4444 ShmFormat = 842088786

	// 16-bit BGRA format, [15:0] B:G:R:A 4:4:4:4 little endian
	ShmFormatBgra4444 ShmFormat = 842088770

	// 16-bit xRGB format, [15:0] x:R:G:B 1:5:5:5 little endian
	ShmFormatXrgb1555 ShmFormat = 892424792

	// 16-bit xBGR 1555 format, [15:0] x:B:G:R 1:5:5:5 little endian
	ShmFormatXbgr1555 ShmFormat = 892420696

	// 16-bit RGBx 5551 format, [15:0] R:G:B:x 5:5:5:1 little endian
	ShmFormatRgbx5551 ShmFormat = 892426322

	// 16-bit BGRx 5551 format, [15:0] B:G:R:x 5:5:5:1 little endian
	ShmFormatBgrx5551 ShmFormat = 892426306

	// 16-bit ARGB 1555 format, [15:0] A:R:G:B 1:5:5:5 little endian
	ShmFormatArgb1555 ShmFormat = 892424769

	// 16-bit ABGR 1555 format, [15:0] A:B:G:R 1:5:5:5 little endian
	ShmFormatAbgr1555 ShmFormat = 892420673

	// 16-bit RGBA 5551 format, [15:0] R:G:B:A 5:5:5:1 little endian
	ShmFormatRgba5551 ShmFormat = 892420434

	// 16-bit BGRA 5551 format, [15:0] B:G:R:A 5:5:5:1 little endian
	ShmFormatBgra5551 ShmFormat = 892420418

	// 16-bit RGB 565 format, [15:0] R:G:B 5:6:5 little endian
	ShmFormatRgb565 ShmFormat = 909199186

	// 16-bit BGR 565 format, [15:0] B:G:R 5:6:5 little endian
	ShmFormatBgr565 ShmFormat = 909199170

	// 24-bit RGB format, [23:0] R:G:B little endian
	ShmFormatRgb888 ShmFormat = 875710290

	// 24-bit BGR format, [23:0] B:G:R little endian
	ShmFormatBgr888 ShmFormat = 875710274

	// 32-bit xBGR format, [31:0] x:B:G:R 8:8:8:8 little endian
	ShmFormatXbgr8888 ShmFormat = 875709016

	// 32-bit RGBx format, [31:0] R:G:B:x 8:8:8:8 little endian
	ShmFormatRgbx8888 ShmFormat = 875714642

	// 32-bit BGRx format, [31:0] B:G:R:x 8:8:8:8 little endian
	ShmFormatBgrx8888 ShmFormat = 875714626

	// 32-bit ABGR format, [31:0] A:B:G:R 8:8:8:8 little endian
	ShmFormatAbgr8888 ShmFormat = 875708993

	// 32-bit RGBA format, [31:0] R:G:B:A 8:8:8:8 little endian
	ShmFormatRgba8888 ShmFormat = 875708754

	// 32-bit BGRA format, [31:0] B:G:R:A 8:8:8:8 little endian
	ShmFormatBgra8888 ShmFormat = 875708738

	// 32-bit xRGB format, [31:0] x:R:G:B 2:10:10:10 little endian
	ShmFormatXrgb2101010 ShmFormat = 808669784

	// 32-bit xBGR format, [31:0] x:B:G:R 2:10:10:10 little endian
	ShmFormatXbgr2101010 ShmFormat = 808665688

	// 32-bit RGBx format, [31:0] R:G:B:x 10:10:10:2 little endian
	ShmFormatRgbx1010102 ShmFormat = 808671314

	// 32-bit BGRx format, [31:0] B:G:R:x 10:10:10:2 little endian
	ShmFormatBgrx1010102 ShmFormat = 808671298

	// 32-bit ARGB format, [31:0] A:R:G:B 2:10:10:10 little endian
	ShmFormatArgb2101010 ShmFormat = 808669761

	// 32-bit ABGR format, [31:0] A:B:G:R 2:10:10:10 little endian
	ShmFormatAbgr2101010 ShmFormat = 808665665

	// 32-bit RGBA format, [31:0] R:G:B:A 10:10:10:2 little endian
	ShmFormatRgba1010102 ShmFormat = 808665426

	// 32-bit BGRA format, [31:0] B:G:R:A 10:10:10:2 little endian
	ShmFormatBgra1010102 ShmFormat = 808665410

	// packed YCbCr format, [31:0] Cr0:Y1:Cb0:Y0 8:8:8:8 little endian
	ShmFormatYuyv ShmFormat = 1448695129

	// packed YCbCr format, [31:0] Cb0:Y1:Cr0:Y0 8:8:8:8 little endian
	ShmFormatYvyu ShmFormat = 1431918169

	// packed YCbCr format, [31:0] Y1:Cr0:Y0:Cb0 8:8:8:8 little endian
	ShmFormatUyvy ShmFormat = 1498831189

	// packed YCbCr format, [31:0] Y1:Cb0:Y0:Cr0 8:8:8:8 little endian
	ShmFormatVyuy ShmFormat = 1498765654

	// packed AYCbCr format, [31:0] A:Y:Cb:Cr 8:8:8:8 little endian
	ShmFormatAyuv ShmFormat = 1448433985

	// 2 plane YCbCr Cr:Cb format, 2x2 subsampled Cr:Cb plane
	ShmFormatNv12 ShmFormat = 842094158

	// 2 plane YCbCr Cb:Cr format, 2x2 subsampled Cb:Cr plane
	ShmFormatNv21 ShmFormat = 825382478

	// 2 plane YCbCr Cr:Cb format, 2x1 subsampled Cr:Cb plane
	ShmFormatNv16 ShmFormat = 909203022

	// 2 plane YCbCr Cb:Cr format, 2x1 subsampled Cb:Cr plane
	ShmFormatNv61 ShmFormat = 825644622

	// 3 plane YCbCr format, 4x4 subsampled Cb (1) and Cr (2) planes
	ShmFormatYuv410 ShmFormat = 961959257

	// 3 plane YCbCr format, 4x4 subsampled Cr (1) and Cb (2) planes
	ShmFormatYvu410 ShmFormat = 961893977

	// 3 plane YCbCr format, 4x1 subsampled Cb (1) and Cr (2) planes
	ShmFormatYuv411 ShmFormat = 825316697

	// 3 plane YCbCr format, 4x1 subsampled Cr (1) and Cb (2) planes
	ShmFormatYvu411 ShmFormat = 825316953

	// 3 plane YCbCr format, 2x2 subsampled Cb (1) and Cr (2) planes
	ShmFormatYuv420 ShmFormat = 842093913

	// 3 plane YCbCr format, 2x2 subsampled Cr (1) and Cb (2) planes
	ShmFormatYvu420 ShmFormat = 842094169

	// 3 plane YCbCr format, 2x1 subsampled Cb (1) and Cr (2) planes
	ShmFormatYuv422 ShmFormat = 909202777

	// 3 plane YCbCr format, 2x1 subsampled Cr (1) and Cb (2) planes
	ShmFormatYvu422 ShmFormat = 909203033

	// 3 plane YCbCr format, non-subsampled Cb (1) and Cr (2) planes
	ShmFormatYuv444 ShmFormat = 875713881

	// 3 plane YCbCr format, non-subsampled Cr (1) and Cb (2) planes
	ShmFormatYvu444 ShmFormat = 875714137

	// [7:0] R
	ShmFormatR8 ShmFormat = 538982482

	// [15:0] R little endian
	ShmFormatR16 ShmFormat = 540422482

	// [15:0] R:G 8:8 little endian
	ShmFormatRg88 ShmFormat = 943212370

	// [15:0] G:R 8:8 little endian
	ShmFormatGr88 ShmFormat = 943215175

	// [31:0] R:G 16:16 little endian
	ShmFormatRg1616 ShmFormat = 842221394

	// [31:0] G:R 16:16 little endian
	ShmFormatGr1616 ShmFormat = 842224199

	// [63:0] x:R:G:B 16:16:16:16 little endian
	ShmFormatXrgb16161616f ShmFormat = 1211388504

	// [63:0] x:B:G:R 16:16:16:16 little endian
	ShmFormatXbgr16161616f ShmFormat = 1211384408

	// [63:0] A:R:G:B 16:16:16:16 little endian
	ShmFormatArgb16161616f ShmFormat = 1211388481

	// [63:0] A:B:G:R 16:16:16:16 little endian
	ShmFormatAbgr16161616f ShmFormat = 1211384385

	// [31:0] X:Y:Cb:Cr 8:8:8:8 little endian
	ShmFormatXyuv8888 ShmFormat = 1448434008

	// [23:0] Cr:Cb:Y 8:8:8 little endian
	ShmFormatVuy888 ShmFormat = 875713878

	// Y followed by U then V, 10:10:10. Non-linear modifier only
	ShmFormatVuy101010 ShmFormat = 808670550

	// [63:0] Cr0:0:Y1:0:Cb0:0:Y0:0 10:6:10:6:10:6:10:6 little endian per 2 Y pixels
	ShmFormatY210 ShmFormat = 808530521

	// [63:0] Cr0:0:Y1:0:Cb0:0:Y0:0 12:4:12:4:12:4:12:4 little endian per 2 Y pixels
	ShmFormatY212 ShmFormat = 842084953

	// [63:0] Cr0:Y1:Cb0:Y0 16:16:16:16 little endian per 2 Y pixels
	ShmFormatY216 ShmFormat = 909193817

	// [31:0] A:Cr:Y:Cb 2:10:10:10 little endian
	ShmFormatY410 ShmFormat = 808531033

	// [63:0] A:0:Cr:0:Y:0:Cb:0 12:4:12:4:12:4:12:4 little endian
	ShmFormatY412 ShmFormat = 842085465

	// [63:0] A:Cr:Y:Cb 16:16:16:16 little endian
	ShmFormatY416 ShmFormat = 909194329

	// [31:0] X:Cr:Y:Cb 2:10:10:10 little endian
	ShmFormatXvyu2101010 ShmFormat = 808670808

	// [63:0] X:0:Cr:0:Y:0:Cb:0 12:4:12:4:12:4:12:4 little endian
	ShmFormatXvyu1216161616 ShmFormat = 909334104

	// [63:0] X:Cr:Y:Cb 16:16:16:16 little endian
	ShmFormatXvyu16161616 ShmFormat = 942954072

	// [63:0]   A3:A2:Y3:0:Cr0:0:Y2:0:A1:A0:Y1:0:Cb0:0:Y0:0  1:1:8:2:8:2:8:2:1:1:8:2:8:2:8:2 little endian
	ShmFormatY0l0 ShmFormat = 810299481

	// [63:0]   X3:X2:Y3:0:Cr0:0:Y2:0:X1:X0:Y1:0:Cb0:0:Y0:0  1:1:8:2:8:2:8:2:1:1:8:2:8:2:8:2 little endian
	ShmFormatX0l0 ShmFormat = 810299480

	// [63:0]   A3:A2:Y3:Cr0:Y2:A1:A0:Y1:Cb0:Y0  1:1:10:10:10:1:1:10:10:10 little endian
	ShmFormatY0l2 ShmFormat = 843853913

	// [63:0]   X3:X2:Y3:Cr0:Y2:X1:X0:Y1:Cb0:Y0  1:1:10:10:10:1:1:10:10:10 little endian
	ShmFormatX0l2 ShmFormat = 843853912

	ShmFormatYuv4208bit ShmFormat = 942691673

	ShmFormatYuv42010bit ShmFormat = 808539481

	ShmFormatXrgb8888A8 ShmFormat = 943805016

	ShmFormatXbgr8888A8 ShmFormat = 943800920

	ShmFormatRgbx8888A8 ShmFormat = 943806546

	ShmFormatBgrx8888A8 ShmFormat = 943806530

	ShmFormatRgb888A8 ShmFormat = 943798354

	ShmFormatBgr888A8 ShmFormat = 943798338

	ShmFormatRgb565A8 ShmFormat = 943797586

	ShmFormatBgr565A8 ShmFormat = 943797570

	// non-subsampled Cr:Cb plane
	ShmFormatNv24 ShmFormat = 875714126

	// non-subsampled Cb:Cr plane
	ShmFormatNv42 ShmFormat = 842290766

	// 2x1 subsampled Cr:Cb plane, 10 bit per channel
	ShmFormatP210 ShmFormat = 808530512

	// 2x2 subsampled Cr:Cb plane 10 bits per channel
	ShmFormatP010 ShmFormat = 808530000

	// 2x2 subsampled Cr:Cb plane 12 bits per channel
	ShmFormatP012 ShmFormat = 842084432

	// 2x2 subsampled Cr:Cb plane 16 bits per channel
	ShmFormatP016 ShmFormat = 909193296

	// [63:0] A:x:B:x:G:x:R:x 10:6:10:6:10:6:10:6 little endian
	ShmFormatAxbxgxrx106106106106 ShmFormat = 808534593

	// 2x2 subsampled Cr:Cb plane
	ShmFormatNv15 ShmFormat = 892425806

	ShmFormatQ410 ShmFormat = 808531025

	ShmFormatQ401 ShmFormat = 825242705
)

func (ShmFormat) String 

func (enum ShmFormat) String() string

type ShmListener 

type ShmListener interface {
	// Informs the client about a valid pixel format that
	// can be used for buffers. Known formats include
	// argb8888 and xrgb8888.
	Format(format ShmFormat)
}

ShmListener is a type that can respond to incoming messages for a Shm object.

type ShmPool 

type ShmPool struct {

	// OnDelete is called when the object is removed from the tracking
	// system.
	OnDelete func()
	// contains filtered or unexported fields
}

The wl_shm_pool object encapsulates a piece of memory shared between the compositor and client. Through the wl_shm_pool object, the client can allocate shared memory wl_buffer objects. All objects created through the same pool 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.

func NewShmPool 

func NewShmPool(state wire.State) *ShmPool

NewShmPool returns a newly instantiated ShmPool. It is primarily intended for use by generated code.

func (*ShmPool) CreateBuffer 

func (obj *ShmPool) CreateBuffer(offset int32, width int32, height int32, stride int32, format ShmFormat) (id *Buffer)

Create a wl_buffer object from the pool.

The buffer is created offset bytes into the pool and has width and height as specified. The stride argument specifies the number of bytes from the 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 immediately after creating a buffer from it.

func (*ShmPool) Delete 

func (obj *ShmPool) Delete()

func (*ShmPool) Destroy 

func (obj *ShmPool) Destroy()

Destroy the shared memory pool.

The mmapped memory will be released when all buffers that have been created from this pool are gone.

func (*ShmPool) Dispatch 

func (obj *ShmPool) Dispatch(msg *wire.MessageBuffer) error

func (*ShmPool) ID 

func (obj *ShmPool) ID() uint32

func (*ShmPool) Interface 

func (obj *ShmPool) Interface() string

func (*ShmPool) MethodName 

func (obj *ShmPool) MethodName(op uint16) string

func (*ShmPool) Resize 

func (obj *ShmPool) Resize(size int32)

This request will cause the server to remap the backing memory for the pool from the file descriptor passed when the pool was created, but using the new size. This request can only be used to make the pool bigger.

func (*ShmPool) SetID 

func (obj *ShmPool) SetID(id uint32)

func (*ShmPool) State 

func (obj *ShmPool) State() wire.State

func (*ShmPool) String 

func (obj *ShmPool) String() string

func (*ShmPool) Version 

func (obj *ShmPool) Version() uint32

type Subcompositor 

type Subcompositor struct {

	// OnDelete is called when the object is removed from the tracking
	// system.
	OnDelete func()
	// contains filtered or unexported fields
}

The global interface exposing sub-surface compositing capabilities. A wl_surface, that has sub-surfaces associated, is called the parent surface. Sub-surfaces can be arbitrarily nested and create a tree of sub-surfaces.

The root surface in a tree of sub-surfaces is the main surface. The main surface cannot be a sub-surface, because sub-surfaces must always have a parent.

A main surface with its sub-surfaces forms a (compound) window. For window management purposes, this set of wl_surface objects is to be considered as a single window, and it should also behave as such.

The aim of sub-surfaces is to offload some of the compositing work within a window from clients to the compositor. A prime example is a video player with decorations and video in separate wl_surface objects. This should allow the compositor to pass YUV video buffer processing to dedicated overlay hardware when possible.

func BindSubcompositor 

func BindSubcompositor(state wire.State, registry wire.Binder, name, version uint32) *Subcompositor

func NewSubcompositor 

func NewSubcompositor(state wire.State) *Subcompositor

NewSubcompositor returns a newly instantiated Subcompositor. It is primarily intended for use by generated code.

func (*Subcompositor) Delete 

func (obj *Subcompositor) Delete()

func (*Subcompositor) Destroy 

func (obj *Subcompositor) Destroy()

Informs the server that the client will not be using this protocol object anymore. This does not affect any other objects, wl_subsurface objects included.

func (*Subcompositor) Dispatch 

func (obj *Subcompositor) Dispatch(msg *wire.MessageBuffer) error

func (*Subcompositor) GetSubsurface 

func (obj *Subcompositor) GetSubsurface(surface *Surface, parent *Surface) (id *Subsurface)

Create a sub-surface interface for the given surface, and associate it with the given parent surface. This turns a plain wl_surface into a sub-surface.

The to-be sub-surface must not already have another role, and it must not have an existing wl_subsurface object. Otherwise a protocol error is raised.

Adding sub-surfaces to a parent is a double-buffered operation on the parent (see wl_surface.commit). The effect of adding a sub-surface becomes visible on the next time the state of the parent surface is applied.

This request modifies the behaviour of wl_surface.commit request on the sub-surface, see the documentation on wl_subsurface interface.

func (*Subcompositor) ID 

func (obj *Subcompositor) ID() uint32

func (*Subcompositor) Interface 

func (obj *Subcompositor) Interface() string

func (*Subcompositor) MethodName 

func (obj *Subcompositor) MethodName(op uint16) string

func (*Subcompositor) SetID 

func (obj *Subcompositor) SetID(id uint32)

func (*Subcompositor) State 

func (obj *Subcompositor) State() wire.State

func (*Subcompositor) String 

func (obj *Subcompositor) String() string

func (*Subcompositor) Version 

func (obj *Subcompositor) Version() uint32

type SubcompositorError 

type SubcompositorError int64
const (
	// the to-be sub-surface is invalid
	SubcompositorErrorBadSurface SubcompositorError = 0
)

func (SubcompositorError) String 

func (enum SubcompositorError) String() string

type Subsurface 

type Subsurface struct {

	// OnDelete is called when the object is removed from the tracking
	// system.
	OnDelete func()
	// contains filtered or unexported fields
}

An additional interface to a wl_surface object, which has been made a sub-surface. A sub-surface has one parent surface. A sub-surface's size and position are not limited to that of the parent. Particularly, a sub-surface is not automatically clipped to its parent's area.

A sub-surface becomes mapped, when a non-NULL wl_buffer is applied and the parent surface is mapped. The order of which one happens first is irrelevant. A sub-surface is hidden if the parent becomes hidden, or if a NULL wl_buffer is applied. These rules apply recursively through the tree of surfaces.

The behaviour of a wl_surface.commit request on a sub-surface depends on the sub-surface's mode. The possible modes are synchronized and desynchronized, see methods wl_subsurface.set_sync and wl_subsurface.set_desync. Synchronized mode caches the wl_surface state to be applied when the parent's state gets applied, and desynchronized mode applies the pending wl_surface state directly. A sub-surface is initially in the synchronized mode.

Sub-surfaces also have another kind of state, which is managed by wl_subsurface requests, as opposed to wl_surface requests. This state includes the sub-surface position relative to the parent surface (wl_subsurface.set_position), and the stacking order of the parent and its sub-surfaces (wl_subsurface.place_above and .place_below). This state is applied when the parent surface's wl_surface state is applied, regardless of the sub-surface's mode. As the exception, set_sync and set_desync are effective immediately.

The main surface can be thought to be always in desynchronized mode, since it does not have a parent in the sub-surfaces sense.

Even if a sub-surface is in desynchronized mode, it will behave as in synchronized mode, if its parent surface behaves as in synchronized mode. This rule is applied recursively throughout the tree of surfaces. This means, that one can set a sub-surface into synchronized mode, and then assume that all its child and grand-child sub-surfaces are synchronized, too, without explicitly setting them.

If the wl_surface associated with the wl_subsurface is destroyed, the wl_subsurface object becomes inert. Note, that destroying either object takes effect immediately. If you need to synchronize the removal of a sub-surface to the parent surface update, unmap the sub-surface first by attaching a NULL wl_buffer, update parent, and then destroy the sub-surface.

If the parent wl_surface object is destroyed, the sub-surface is unmapped.

func NewSubsurface 

func NewSubsurface(state wire.State) *Subsurface

NewSubsurface returns a newly instantiated Subsurface. It is primarily intended for use by generated code.

func (*Subsurface) Delete 

func (obj *Subsurface) Delete()

func (*Subsurface) Destroy 

func (obj *Subsurface) Destroy()

The sub-surface interface is removed from the wl_surface object that was turned into a sub-surface with a wl_subcompositor.get_subsurface request. The wl_surface's association to the parent is deleted, and the wl_surface loses its role as a sub-surface. The wl_surface is unmapped immediately.

func (*Subsurface) Dispatch 

func (obj *Subsurface) Dispatch(msg *wire.MessageBuffer) error

func (*Subsurface) ID 

func (obj *Subsurface) ID() uint32

func (*Subsurface) Interface 

func (obj *Subsurface) Interface() string

func (*Subsurface) MethodName 

func (obj *Subsurface) MethodName(op uint16) string

func (*Subsurface) PlaceAbove 

func (obj *Subsurface) PlaceAbove(sibling *Surface)

This sub-surface is taken from the stack, and put back just above the reference surface, changing the z-order of the sub-surfaces. The reference surface must be one of the sibling surfaces, or the parent surface. Using any other surface, including this sub-surface, will cause a protocol error.

The z-order is double-buffered. Requests are handled in order and applied immediately to a pending state. The final pending state is copied to the active state the next time the state of the parent surface is applied. When this happens depends on whether the parent surface is in synchronized mode or not. See wl_subsurface.set_sync and wl_subsurface.set_desync for details.

A new sub-surface is initially added as the top-most in the stack of its siblings and parent.

func (*Subsurface) PlaceBelow 

func (obj *Subsurface) PlaceBelow(sibling *Surface)

The sub-surface is placed just below the reference surface. See wl_subsurface.place_above.

func (*Subsurface) SetDesync 

func (obj *Subsurface) SetDesync()

Change the commit behaviour of the sub-surface to desynchronized mode, also described as independent or freely running mode.

In desynchronized mode, wl_surface.commit on a sub-surface will apply the pending state directly, without caching, as happens normally with a wl_surface. Calling wl_surface.commit on the parent surface has no effect on the sub-surface's wl_surface state. This mode allows a sub-surface to be updated on its own.

If cached state exists when wl_surface.commit is called in desynchronized mode, the pending state is added to the cached state, and applied as a whole. This invalidates the cache.

Note: even if a sub-surface is set to desynchronized, a parent sub-surface may override it to behave as synchronized. For details, see wl_subsurface.

If a surface's parent surface behaves as desynchronized, then the cached state is applied on set_desync.

func (*Subsurface) SetID 

func (obj *Subsurface) SetID(id uint32)

func (*Subsurface) SetPosition 

func (obj *Subsurface) SetPosition(x int32, y int32)

This schedules a sub-surface position change. The sub-surface will be moved so that its origin (top left corner pixel) will be at the location x, y of the parent surface coordinate system. The coordinates are not restricted to the parent surface area. Negative values are allowed.

The scheduled coordinates will take effect whenever the state of the parent surface is applied. When this happens depends on whether the parent surface is in synchronized mode or not. See wl_subsurface.set_sync and wl_subsurface.set_desync for details.

If more than one set_position request is invoked by the client before the commit of the parent surface, the position of a new request always replaces the scheduled position from any previous request.

The initial position is 0, 0.

func (*Subsurface) SetSync 

func (obj *Subsurface) SetSync()

Change the commit behaviour of the sub-surface to synchronized mode, also described as the parent dependent mode.

In synchronized mode, wl_surface.commit on a sub-surface will accumulate the committed state in a cache, but the state will not be applied and hence will not change the compositor output. The cached state is applied to the sub-surface immediately after the parent surface's state is applied. This ensures atomic updates of the parent and all its synchronized sub-surfaces. Applying the cached state will invalidate the cache, so further parent surface commits do not (re-)apply old state.

See wl_subsurface for the recursive effect of this mode.

func (*Subsurface) State 

func (obj *Subsurface) State() wire.State

func (*Subsurface) String 

func (obj *Subsurface) String() string

func (*Subsurface) Version 

func (obj *Subsurface) Version() uint32

type SubsurfaceError 

type SubsurfaceError int64
const (
	// wl_surface is not a sibling or the parent
	SubsurfaceErrorBadSurface SubsurfaceError = 0
)

func (SubsurfaceError) String 

func (enum SubsurfaceError) String() string

type Surface 

type Surface struct {
	// Listener's methods are called by incoming messages from the
	// remote end via Dispatch. If it is nil, messages are silently
	// ignored.
	Listener SurfaceListener

	// OnDelete is called when the object is removed from the tracking
	// system.
	OnDelete func()
	// contains filtered or unexported fields
}

A surface is a rectangular area that may be displayed on zero or more outputs, and shown any number of times at the compositor's discretion. They can present wl_buffers, receive user input, and define a local coordinate system.

The size of a surface (and relative positions on it) is described in surface-local coordinates, which may differ from the buffer coordinates of the pixel content, in case a buffer_transform or a buffer_scale is used.

A surface without a "role" is fairly useless: a compositor does not know where, when or how to present it. The role is the purpose of a wl_surface. Examples of roles are a cursor for a pointer (as set by wl_pointer.set_cursor), a drag icon (wl_data_device.start_drag), a sub-surface (wl_subcompositor.get_subsurface), and a window as defined by a shell protocol (e.g. wl_shell.get_shell_surface).

A surface can have only one role at a time. Initially a wl_surface does not have a role. Once a wl_surface is given a role, it is set permanently for the whole lifetime of the wl_surface object. Giving the current role again is allowed, unless explicitly forbidden by the relevant interface specification.

Surface roles are given by requests in other interfaces such as wl_pointer.set_cursor. The request should explicitly mention that this request gives a role to a wl_surface. Often, this request also creates a new protocol object that represents the role and adds additional functionality to wl_surface. When a client wants to destroy a wl_surface, they must destroy this 'role object' before the wl_surface.

Destroying the role object does not remove the role from the wl_surface, but it may stop the wl_surface from "playing the role". For instance, if a wl_subsurface object is destroyed, the wl_surface it was created for will be unmapped and forget its position and z-order. It is allowed to create a wl_subsurface for the same wl_surface again, but it is not allowed to use the wl_surface as a cursor (cursor is a different role than sub-surface, and role switching is not allowed).

func NewSurface 

func NewSurface(state wire.State) *Surface

NewSurface returns a newly instantiated Surface. It is primarily intended for use by generated code.

func (*Surface) Attach 

func (obj *Surface) Attach(buffer *Buffer, x int32, y int32)

Set a buffer as the content of this surface.

The new size of the surface is calculated based on the buffer size transformed by the inverse buffer_transform and the inverse buffer_scale. This means that at commit time the supplied buffer size must be an integer multiple of the buffer_scale. If that's not the case, an invalid_size error is sent.

The x and y arguments specify the location of the new pending buffer's upper left corner, relative to the current buffer's upper left corner, in surface-local coordinates. In other words, the x and y, combined with the new surface size define in which directions the surface's size changes.

Surface contents are double-buffered state, see wl_surface.commit.

The initial surface contents are void; there is no content. wl_surface.attach assigns the given wl_buffer as the pending wl_buffer. wl_surface.commit makes the pending wl_buffer the new surface contents, and the size of the surface becomes the size calculated from the wl_buffer, as described above. After commit, there is no pending buffer until the next attach.

Committing a pending wl_buffer allows the compositor to read the pixels in the wl_buffer. The compositor may access the pixels at any time after the wl_surface.commit request. When the compositor will not access the pixels anymore, it will send the wl_buffer.release event. Only after receiving wl_buffer.release, the client may reuse the wl_buffer. A wl_buffer that has been attached and then replaced by another attach instead of committed will not receive a release event, and is not used by the compositor.

If a pending wl_buffer has been committed to more than one wl_surface, the delivery of wl_buffer.release events becomes undefined. A well behaved client should not rely on wl_buffer.release events in this case. Alternatively, a client could create multiple wl_buffer objects from the same backing storage or use wp_linux_buffer_release.

Destroying the wl_buffer after wl_buffer.release does not change the surface contents. However, if the client destroys the wl_buffer before receiving the wl_buffer.release event, the surface contents become undefined immediately.

If wl_surface.attach is sent with a NULL wl_buffer, the following wl_surface.commit will remove the surface content.

func (*Surface) Commit 

func (obj *Surface) Commit()

Surface state (input, opaque, and damage regions, attached buffers, etc.) is double-buffered. Protocol requests modify the pending state, as opposed to the current state in use by the compositor. A commit request atomically applies all pending state, replacing the current state. After commit, the new pending state is as documented for each related request.

On commit, a pending wl_buffer is applied first, and all other state second. This means that all coordinates in double-buffered state are relative to the new wl_buffer coming into use, except for wl_surface.attach itself. If there is no pending wl_buffer, the coordinates are relative to the current surface contents.

All requests that need a commit to become effective are documented to affect double-buffered state.

Other interfaces may add further double-buffered surface state.

func (*Surface) Damage 

func (obj *Surface) Damage(x int32, y int32, width int32, height int32)

This request is used to describe the regions where the pending buffer is different from the current surface contents, and where the surface therefore needs to be repainted. The compositor ignores the parts of the damage that fall outside of the surface.

Damage is double-buffered state, see wl_surface.commit.

The damage rectangle is specified in surface-local coordinates, where x and y specify the upper left corner of the damage rectangle.

The initial value for pending damage is empty: no damage. wl_surface.damage adds pending damage: the new pending damage is the union of old pending damage and the given rectangle.

wl_surface.commit assigns pending damage as the current damage, and clears pending damage. The server will clear the current damage as it repaints the surface.

Note! New clients should not use this request. Instead damage can be posted with wl_surface.damage_buffer which uses buffer coordinates instead of surface coordinates.

func (*Surface) DamageBuffer 

func (obj *Surface) DamageBuffer(x int32, y int32, width int32, height int32)

This request is used to describe the regions where the pending buffer is different from the current surface contents, and where the surface therefore needs to be repainted. The compositor ignores the parts of the damage that fall outside of the surface.

Damage is double-buffered state, see wl_surface.commit.

The damage rectangle is specified in buffer coordinates, where x and y specify the upper left corner of the damage rectangle.

The initial value for pending damage is empty: no damage. wl_surface.damage_buffer adds pending damage: the new pending damage is the union of old pending damage and the given rectangle.

wl_surface.commit assigns pending damage as the current damage, and clears pending damage. The server will clear the current damage as it repaints the surface.

This request differs from wl_surface.damage in only one way - it takes damage in buffer coordinates instead of surface-local coordinates. While this generally is more intuitive than surface coordinates, it is especially desirable when using wp_viewport or when a drawing library (like EGL) is unaware of buffer scale and buffer transform.

Note: Because buffer transformation changes and damage requests may be interleaved in the protocol stream, it is impossible to determine the actual mapping between surface and buffer damage until wl_surface.commit time. Therefore, compositors wishing to take both kinds of damage into account will have to accumulate damage from the two requests separately and only transform from one to the other after receiving the wl_surface.commit.

func (*Surface) Delete 

func (obj *Surface) Delete()

func (*Surface) Destroy 

func (obj *Surface) Destroy()

Deletes the surface and invalidates its object ID.

func (*Surface) Dispatch 

func (obj *Surface) Dispatch(msg *wire.MessageBuffer) error

func (*Surface) Frame 

func (obj *Surface) Frame() (callback *Callback)

Request a notification when it is a good time to start drawing a new frame, by creating a frame callback. This is useful for throttling redrawing operations, and driving animations.

When a client is animating on a wl_surface, it can use the 'frame' request to get notified when it is a good time to draw and commit the next frame of animation. If the client commits an update earlier than that, it is likely that some updates will not make it to the display, and the client is wasting resources by drawing too often.

The frame request will take effect on the next wl_surface.commit. The notification will only be posted for one frame unless requested again. For a wl_surface, the notifications are posted in the order the frame requests were committed.

The server must send the notifications so that a client will not send excessive updates, while still allowing the highest possible update rate for clients that wait for the reply before drawing again. The server should give some time for the client to draw and commit after sending the frame callback events to let it hit the next output refresh.

A server should avoid signaling the frame callbacks if the surface is not visible in any way, e.g. the surface is off-screen, or completely obscured by other opaque surfaces.

The object returned by this request will be destroyed by the compositor after the callback is fired and as such the client must not attempt to use it after that point.

The callback_data passed in the callback is the current time, in milliseconds, with an undefined base.

func (*Surface) ID 

func (obj *Surface) ID() uint32

func (*Surface) Interface 

func (obj *Surface) Interface() string

func (*Surface) MethodName 

func (obj *Surface) MethodName(op uint16) string

func (*Surface) SetBufferScale 

func (obj *Surface) SetBufferScale(scale int32)

This request sets an optional scaling factor on how the compositor interprets the contents of the buffer attached to the window.

Buffer scale is double-buffered state, see wl_surface.commit.

A newly created surface has its buffer scale set to 1.

wl_surface.set_buffer_scale changes the pending buffer scale. wl_surface.commit copies the pending buffer scale to the current one. Otherwise, the pending and current values are never changed.

The purpose of this request is to allow clients to supply higher resolution buffer data for use on high resolution outputs. It is intended that you pick the same buffer scale as the scale of the output that the surface is displayed on. This means the compositor can avoid scaling when rendering the surface on that output.

Note that if the scale is larger than 1, then you have to attach a buffer that is larger (by a factor of scale in each dimension) than the desired surface size.

If scale is not positive the invalid_scale protocol error is raised.

func (*Surface) SetBufferTransform 

func (obj *Surface) SetBufferTransform(transform OutputTransform)

This request sets an optional transformation on how the compositor interprets the contents of the buffer attached to the surface. The accepted values for the transform parameter are the values for wl_output.transform.

Buffer transform is double-buffered state, see wl_surface.commit.

A newly created surface has its buffer transformation set to normal.

wl_surface.set_buffer_transform changes the pending buffer transformation. wl_surface.commit copies the pending buffer transformation to the current one. Otherwise, the pending and current values are never changed.

The purpose of this request is to allow clients to render content according to the output transform, thus permitting the compositor to use certain optimizations even if the display is rotated. Using hardware overlays and scanning out a client buffer for fullscreen surfaces are examples of such optimizations. Those optimizations are highly dependent on the compositor implementation, so the use of this request should be considered on a case-by-case basis.

Note that if the transform value includes 90 or 270 degree rotation, the width of the buffer will become the surface height and the height of the buffer will become the surface width.

If transform is not one of the values from the wl_output.transform enum the invalid_transform protocol error is raised.

func (*Surface) SetID 

func (obj *Surface) SetID(id uint32)

func (*Surface) SetInputRegion 

func (obj *Surface) SetInputRegion(region *Region)

This request sets the region of the surface that can receive pointer and touch events.

Input events happening outside of this region will try the next surface in the server surface stack. The compositor ignores the parts of the input region that fall outside of the surface.

The input region is specified in surface-local coordinates.

Input region is double-buffered state, see wl_surface.commit.

wl_surface.set_input_region changes the pending input region. wl_surface.commit copies the pending region to the current region. Otherwise the pending and current regions are never changed, except cursor and icon surfaces are special cases, see wl_pointer.set_cursor and wl_data_device.start_drag.

The initial value for an input region is infinite. That means the whole surface will accept input. Setting the pending input region has copy semantics, and the wl_region object can be destroyed immediately. A NULL wl_region causes the input region to be set to infinite.

func (*Surface) SetOpaqueRegion 

func (obj *Surface) SetOpaqueRegion(region *Region)

This request sets the region of the surface that contains opaque content.

The opaque region is an optimization hint for the compositor that lets it optimize the 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 opaque region is specified in surface-local coordinates.

The compositor ignores the parts of the opaque region that fall outside of the surface.

Opaque region is double-buffered state, see wl_surface.commit.

wl_surface.set_opaque_region changes the pending opaque region. wl_surface.commit copies the pending region to the current region. Otherwise, the pending and current regions are never changed.

The initial value for an opaque region is empty. Setting the pending opaque region has copy semantics, and the wl_region object can be destroyed immediately. A NULL wl_region causes the pending opaque region to be set to empty.

func (*Surface) State 

func (obj *Surface) State() wire.State

func (*Surface) String 

func (obj *Surface) String() string

func (*Surface) Version 

func (obj *Surface) Version() uint32

type SurfaceError 

type SurfaceError int64

These errors can be emitted in response to wl_surface requests. 

const (
	// buffer scale value is invalid
	SurfaceErrorInvalidScale SurfaceError = 0

	// buffer transform value is invalid
	SurfaceErrorInvalidTransform SurfaceError = 1

	// buffer size is invalid
	SurfaceErrorInvalidSize SurfaceError = 2
)

func (SurfaceError) String 

func (enum SurfaceError) String() string

type SurfaceListener 

type SurfaceListener interface {
	// 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.
	//
	// Note that a surface may be overlapping with zero or more outputs.
	Enter(output *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.
	//
	// Clients should not use the number of outputs the surface is on for frame
	// throttling purposes. The surface might be hidden even if no leave event
	// has been sent, and the compositor might expect new surface content
	// updates even if no enter event has been sent. The frame event should be
	// used instead.
	Leave(output *Output)
}

SurfaceListener is a type that can respond to incoming messages for a Surface object.

type Touch 

type Touch struct {
	// Listener's methods are called by incoming messages from the
	// remote end via Dispatch. If it is nil, messages are silently
	// ignored.
	Listener TouchListener

	// OnDelete is called when the object is removed from the tracking
	// system.
	OnDelete func()
	// contains filtered or unexported fields
}

The wl_touch interface represents a touchscreen associated with a seat.

Touch interactions can consist of one or more contacts. For each contact, a series of events is generated, starting with a down event, followed by zero or more motion events, and ending with an up event. Events relating to the same contact point can be identified by the ID of the sequence.

func NewTouch 

func NewTouch(state wire.State) *Touch

NewTouch returns a newly instantiated Touch. It is primarily intended for use by generated code.

func (*Touch) Delete 

func (obj *Touch) Delete()

func (*Touch) Dispatch 

func (obj *Touch) Dispatch(msg *wire.MessageBuffer) error

func (*Touch) ID 

func (obj *Touch) ID() uint32

func (*Touch) Interface 

func (obj *Touch) Interface() string

func (*Touch) MethodName 

func (obj *Touch) MethodName(op uint16) string

func (*Touch) Release 

func (obj *Touch) Release()

func (*Touch) SetID 

func (obj *Touch) SetID(id uint32)

func (*Touch) State 

func (obj *Touch) State() wire.State

func (*Touch) String 

func (obj *Touch) String() string

func (*Touch) Version 

func (obj *Touch) Version() uint32

type TouchListener 

type TouchListener interface {
	// A new touch point has appeared on the surface. This touch point is
	// assigned a unique ID. Future events from this touch point reference
	// this ID. The ID ceases to be valid after a touch up event and may be
	// reused in the future.
	Down(serial uint32, time uint32, surface *Surface, id int32, x wire.Fixed, y wire.Fixed)

	// The touch point has disappeared. No further events will be sent for
	// this touch point and the touch point's ID is released and may be
	// reused in a future touch down event.
	Up(serial uint32, time uint32, id int32)

	// A touch point has changed coordinates.
	Motion(time uint32, id int32, x wire.Fixed, y wire.Fixed)

	// Indicates the end of a set of events that logically belong together.
	// A client is expected to accumulate the data in all events within the
	// frame before proceeding.
	//
	// A wl_touch.frame terminates at least one event but otherwise no
	// guarantee is provided about the set of events within a frame. A client
	// must assume that any state not updated in a frame is unchanged from the
	// previously known state.
	Frame()

	// Sent if the compositor decides the touch stream is a global
	// gesture. No further events are sent to the clients from that
	// particular gesture. Touch cancellation applies to all touch points
	// currently active on this client's surface. The client is
	// responsible for finalizing the touch points, future touch points on
	// this surface may reuse the touch point ID.
	Cancel()

	// Sent when a touchpoint has changed its shape.
	//
	// This event does not occur on its own. It is sent before a
	// wl_touch.frame event and carries the new shape information for
	// any previously reported, or new touch points of that frame.
	//
	// Other events describing the touch point such as wl_touch.down,
	// wl_touch.motion or wl_touch.orientation may be sent within the
	// same wl_touch.frame. A client should treat these events as a single
	// logical touch point update. The order of wl_touch.shape,
	// wl_touch.orientation and wl_touch.motion is not guaranteed.
	// A wl_touch.down event is guaranteed to occur before the first
	// wl_touch.shape event for this touch ID but both events may occur within
	// the same wl_touch.frame.
	//
	// A touchpoint shape is approximated by an ellipse through the major and
	// minor axis length. The major axis length describes the longer diameter
	// of the ellipse, while the minor axis length describes the shorter
	// diameter. Major and minor are orthogonal and both are specified in
	// surface-local coordinates. The center of the ellipse is always at the
	// touchpoint location as reported by wl_touch.down or wl_touch.move.
	//
	// This event is only sent by the compositor if the touch device supports
	// shape reports. The client has to make reasonable assumptions about the
	// shape if it did not receive this event.
	Shape(id int32, major wire.Fixed, minor wire.Fixed)

	// Sent when a touchpoint has changed its orientation.
	//
	// This event does not occur on its own. It is sent before a
	// wl_touch.frame event and carries the new shape information for
	// any previously reported, or new touch points of that frame.
	//
	// Other events describing the touch point such as wl_touch.down,
	// wl_touch.motion or wl_touch.shape may be sent within the
	// same wl_touch.frame. A client should treat these events as a single
	// logical touch point update. The order of wl_touch.shape,
	// wl_touch.orientation and wl_touch.motion is not guaranteed.
	// A wl_touch.down event is guaranteed to occur before the first
	// wl_touch.orientation event for this touch ID but both events may occur
	// within the same wl_touch.frame.
	//
	// The orientation describes the clockwise angle of a touchpoint's major
	// axis to the positive surface y-axis and is normalized to the -180 to
	// +180 degree range. The granularity of orientation depends on the touch
	// device, some devices only support binary rotation values between 0 and
	// 90 degrees.
	//
	// This event is only sent by the compositor if the touch device supports
	// orientation reports.
	Orientation(id int32, orientation wire.Fixed)
}

TouchListener is a type that can respond to incoming messages for a Touch object.

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