wayland_server_zwp_linux_buffer_release_v1_t

buffer release explicit synchronization

Synopsis

#include <wayland-server-protocol-unstable.hpp>

Inherits wayland::server::resource_t.

void fenced_release (int fence, bool post=true)
release buffer with fence
void immediate_release (bool post=true)
release buffer immediately
bool proxy_has_object () const
Check whether this wrapper actually wraps an object.
void post_no_memory () const
uint32_t get_id () const
client_t get_client () const
unsigned int get_version () const
std::string get_class ()

Static Public Attributes

static constexpr std::uint32_t fenced_release_since_version = 1
Minimum protocol version required for the fenced_release function.
static constexpr std::uint32_t immediate_release_since_version = 1
Minimum protocol version required for the immediate_release function.

Detailed Description

buffer release explicit synchronization

This object is instantiated in response to a zwp_linux_surface_synchronization_v1.get_release request.

It provides an alternative to wl_buffer.release events, providing a unique release from a single wl_surface.commit request. The release event also supports explicit synchronization, providing a fence FD for the client to synchronize against.

Exactly one event, either a fenced_release or an immediate_release, will be emitted for the wl_surface.commit request. The compositor can choose release by release which event it uses.

This event does not replace wl_buffer.release events; servers are still required to send those events.

Once a buffer release object has delivered a 'fenced_release' or an 'immediate_release' event it is automatically destroyed.

Definition at line 2621 of file wayland-server-protocol-unstable.hpp.

Member Function Documentation

void zwp_linux_buffer_release_v1_t::fenced_release (int fence, bool post = true)

release buffer with fence

Parameters: fence fence for last operation on buffer

Sent when the compositor has finalised its usage of the associated buffer for the relevant commit, providing a dma_fence which will be signaled when all operations by the compositor on that buffer for that commit have finished.

Once the fence has signaled, and assuming the associated buffer is not pending release from other wl_surface.commit requests, no additional explicit or implicit synchronization is required to safely reuse or destroy the buffer.

This event destroys the zwp_linux_buffer_release_v1 object.

Definition at line 5336 of file wayland-server-protocol-unstable.cpp.

std::string wayland::server::resource_t::get_class () [inherited]

Retrieve the interface name (class) of a resource object.

Returns: Interface name of the resource object.

client_t wayland::server::resource_t::get_client () const [inherited]

Get the associated client

Returns: the client that owns the resource.

uint32_t wayland::server::resource_t::get_id () const [inherited]

Get the internal ID of the resource

Returns: the internal ID of the resource

unsigned int wayland::server::resource_t::get_version () const [inherited]

Get interface version

Returns: Interface version this resource has been constructed with.

void zwp_linux_buffer_release_v1_t::immediate_release (bool post = true)

release buffer immediately Sent when the compositor has finalised its usage of the associated buffer for the relevant commit, and either performed no operations using it, or has a guarantee that all its operations on that buffer for that commit have finished.

Once this event is received, and assuming the associated buffer is not pending release from other wl_surface.commit requests, no additional explicit or implicit synchronization is required to safely reuse or destroy the buffer.

This event destroys the zwp_linux_buffer_release_v1 object.

Definition at line 5341 of file wayland-server-protocol-unstable.cpp.

void wayland::server::resource_t::post_no_memory () const [inherited]

Post 'not enough memory' error to the client

If the compositor has not enough memory to fulfill a certail request of the client, this function can be called to notify the client of this circumstance.