Struct webrender_api::ExternalScrollId

#[repr(C)]
pub struct ExternalScrollId(pub u64, pub PipelineId);

An external identifier that uniquely identifies a scroll frame independent of its ClipId, which may change from frame to frame. This should be unique within a pipeline. WebRender makes no attempt to ensure uniqueness. The zero value is reserved for use by the root scroll node of every pipeline, which always has an external id.

When setting display lists with the preserve_frame_state this id is used to preserve scroll offsets between different sets of ClipScrollNodes which are ScrollFrames.

Methods

impl ExternalScrollId

pub fn pipeline_id(&self) -> PipelineId

pub fn is_root(&self) -> bool

Trait Implementations

impl Clone for ExternalScrollId

fn clone(&self) -> ExternalScrollId

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Copy for ExternalScrollId

impl Debug for ExternalScrollId

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

Formats the value using the given formatter.

impl Default for ExternalScrollId

fn default() -> ExternalScrollId

Returns the "default value" for a type.

impl<'de> Deserialize<'de> for ExternalScrollId

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error> where
    __D: Deserializer<'de>, 

Deserialize this value from the given Serde deserializer.

impl Eq for ExternalScrollId

impl Hash for ExternalScrollId

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given [Hasher].

fn hash_slice<H>(data: &[Self], state: &mut H) where
    H: Hasher, 

Feeds a slice of this type into the given [Hasher].

impl PartialEq<ExternalScrollId> for ExternalScrollId

fn eq(&self, other: &ExternalScrollId) -> bool

This method tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &ExternalScrollId) -> bool

This method tests for !=.

impl Peek for ExternalScrollId

unsafe fn peek_from(bytes: *const u8, output: *mut Self) -> *const u8

Deserialize from the buffer pointed to by bytes.

impl Poke for ExternalScrollId

fn max_size() -> usize

Return the maximum number of bytes that the serialized version of Self will occupy.

unsafe fn poke_into(&self, bytes: *mut u8) -> *mut u8

Serialize into the buffer pointed to by bytes.

impl Serialize for ExternalScrollId

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error> where
    __S: Serializer, 

Serialize this value into the given Serde serializer.

impl StructuralEq for ExternalScrollId

impl StructuralPartialEq for ExternalScrollId