pub struct Buffer { /* private fields */ }
Expand description

A wrapper around a wl_buffer::WlBuffer which has been allocated via a SlotPool.

When this object is dropped, the buffer will be destroyed immediately if it is not active, or upon the server’s release if it is.

Implementations§

source§

impl Buffer

source

pub fn attach_to(&self, surface: &WlSurface) -> Result<(), ActivateSlotError>

Attach a buffer to a surface.

This marks the slot as active until the server releases the buffer, which will happen automatically assuming the surface is committed without attaching a different buffer.

Note: if you need to ensure that canvas() calls never return data that could be attached to a surface in a multi-threaded client, make this call while you have exclusive access to the corresponding SlotPool.

source

pub fn wl_buffer(&self) -> &WlBuffer

Get the inner buffer.

source

pub fn height(&self) -> i32

source

pub fn stride(&self) -> i32

source

pub fn canvas<'pool>( &self, pool: &'pool mut SlotPool ) -> Option<&'pool mut [u8]>

Get the bytes corresponding to this buffer if drawing is permitted.

This may be smaller than the canvas associated with the slot.

source

pub fn slot(&self) -> Slot

Get the slot corresponding to this buffer.

source

pub fn activate(&self) -> Result<(), ActivateSlotError>

Manually mark a buffer as active.

An active buffer prevents drawing on its slot until a Release event is received or until manually deactivated.

source

pub fn deactivate(&self) -> Result<(), ActivateSlotError>

Manually mark a buffer as inactive.

This should be used when the buffer was manually marked as active or when a buffer was attached to a surface but not committed. Calling this function on a buffer that was committed to a surface risks making the surface contents undefined.

Trait Implementations§

source§

impl CanvasKey for Buffer

source§

fn canvas<'pool>(&self, pool: &'pool mut SlotPool) -> Option<&'pool mut [u8]>

source§

impl Debug for Buffer

source§

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more
source§

impl Drop for Buffer

source§

fn drop(&mut self)

Executes the destructor for this type. Read more

Auto Trait Implementations§

§

impl !RefUnwindSafe for Buffer

§

impl Send for Buffer

§

impl Sync for Buffer

§

impl Unpin for Buffer

§

impl !UnwindSafe for Buffer

Blanket Implementations§

source§

impl<T> Any for T
where T: 'static + ?Sized,

source§

fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
source§

impl<T> Borrow<T> for T
where T: ?Sized,

source§

fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
source§

impl<T> BorrowMut<T> for T
where T: ?Sized,

source§

fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
source§

impl<T> Downcast for T
where T: Any,

source§

fn into_any(self: Box<T>) -> Box<dyn Any>

Convert Box<dyn Trait> (where Trait: Downcast) to Box<dyn Any>. Box<dyn Any> can then be further downcast into Box<ConcreteType> where ConcreteType implements Trait.
source§

fn into_any_rc(self: Rc<T>) -> Rc<dyn Any>

Convert Rc<Trait> (where Trait: Downcast) to Rc<Any>. Rc<Any> can then be further downcast into Rc<ConcreteType> where ConcreteType implements Trait.
source§

fn as_any(&self) -> &(dyn Any + 'static)

Convert &Trait (where Trait: Downcast) to &Any. This is needed since Rust cannot generate &Any’s vtable from &Trait’s.
source§

fn as_any_mut(&mut self) -> &mut (dyn Any + 'static)

Convert &mut Trait (where Trait: Downcast) to &Any. This is needed since Rust cannot generate &mut Any’s vtable from &mut Trait’s.
source§

impl<T> DowncastSync for T
where T: Any + Send + Sync,

source§

fn into_any_arc(self: Arc<T>) -> Arc<dyn Any + Send + Sync>

Convert Arc<Trait> (where Trait: Downcast) to Arc<Any>. Arc<Any> can then be further downcast into Arc<ConcreteType> where ConcreteType implements Trait.
source§

impl<T> From<T> for T

source§

fn from(t: T) -> T

Returns the argument unchanged.

source§

impl<T> Instrument for T

source§

fn instrument(self, span: Span) -> Instrumented<Self>

Instruments this type with the provided Span, returning an Instrumented wrapper. Read more
source§

fn in_current_span(self) -> Instrumented<Self>

Instruments this type with the current Span, returning an Instrumented wrapper. Read more
source§

impl<T, U> Into<U> for T
where U: From<T>,

source§

fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

source§

impl<T, U> TryFrom<U> for T
where U: Into<T>,

§

type Error = Infallible

The type returned in the event of a conversion error.
source§

fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
source§

impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

§

type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
source§

fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.
source§

impl<T> WithSubscriber for T

source§

fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self>
where S: Into<Dispatch>,

Attaches the provided Subscriber to this type, returning a WithDispatch wrapper. Read more
source§

fn with_current_subscriber(self) -> WithDispatch<Self>

Attaches the current default Subscriber to this type, returning a WithDispatch wrapper. Read more