Struct LayerRasterCacheKey 

pub struct LayerRasterCacheKey { /* private fields */ }

Key of one cached layer raster. It covers the kind of entry, the owning node, the content and effect hashes, the layer bounds, the pixel size, the raster scale and the sub-pixel phase.

Implementations

impl LayerRasterCacheKey

pub fn source_content( stable_id: Option<NodeId>, content_hash: u64, local_bounds: Rect, pixel_size: (u32, u32), raster_scale: RasterScale, device_phase: Point, ) -> Self

Key for the rasterized content of a layer. content_hash hashes the content, local_bounds is the layer’s bounds, pixel_size is the raster size in pixels, and device_phase is the layer’s sub-pixel position, kept in sixteenth-pixel steps.

pub fn backdrop_effect( stable_id: Option<NodeId>, input_hash: u64, effect_hash: u64, local_bounds: Rect, pixel_size: (u32, u32), raster_scale: RasterScale, ) -> Self

Key for the output of a backdrop effect. input_hash hashes the backdrop that the effect reads and effect_hash hashes the effect.

pub fn layer_effect( stable_id: Option<NodeId>, input_hash: u64, effect_hash: u64, local_bounds: Rect, pixel_size: (u32, u32), raster_scale: RasterScale, ) -> Self

A layer’s render effect applied over its retained surface: the output is a pure function of the surface’s content, the effect and the layer’s pixel rect within the surface.

pub fn scene_range( content_hash: u64, local_bounds: Rect, pixel_size: (u32, u32), raster_scale: RasterScale, ) -> Self

Key for a cached range of the scene, identified by the hash of its content and owned by no node.

pub fn prefix_snapshot( content_hash: u64, prefix_len: u64, local_bounds: Rect, pixel_size: (u32, u32), raster_scale: RasterScale, ) -> Self

A snapshot of the scene’s rendered prefix: the bytes the target held after drawing ops [0, prefix_len) over the pass’s clear color. A replay of captured bytes is identical to direct rendering by construction — no flattening, so none of the chained-rounding divergence flatten entries carry.

pub fn kind_slot(self) -> usize

Index of this key’s kind in 0..LAYER_RASTER_CACHE_KIND_COUNT, for per-kind accounting.

pub fn stable_id(self) -> Option<NodeId>

The node that owns the entry, or None when the entry belongs to no single node.

pub fn is_scene_range(self) -> bool

Whether the key is for a scene range or a prefix snapshot.

pub fn is_source_content(self) -> bool

Whether the key is for the rasterized content of a layer.

pub fn identity(self) -> Option<LayerRasterCacheIdentity>

The identity of the entry, or None when it has no owning node.

pub fn pixel_size(self) -> (u32, u32)

Raster size in pixels as width and height.

pub fn local_bounds_bits(self) -> [u32; 4]

The bit pattern of the entry’s local bounds: the place a keyless entry occupies, stable while its content changes.

pub fn raster_scale(self) -> RasterScale

The device scale the raster is drawn at.

pub fn draws_other_content(self, other: Self) -> bool

Whether other rasterizes other content than this key: another kind, node, content, effect or bounds. Keys that differ only in the scale or the sub-pixel phase they are drawn at hold the same content.

Trait Implementations

impl Clone for LayerRasterCacheKey

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for LayerRasterCacheKey

impl Debug for LayerRasterCacheKey

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

Formats the value using the given formatter.

impl Eq for LayerRasterCacheKey

impl Hash for LayerRasterCacheKey

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, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for LayerRasterCacheKey

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for LayerRasterCacheKey