Struct CacheKey 

pub struct CacheKey {
    pub text_hash: u64,
    pub font_cache_key: u64,
    pub font_size: u32,
    pub weight: u16,
    pub stretch: u16,
    pub style: u8,
    pub direction: u8,
    pub letter_spacing: i32,
    pub word_spacing: i32,
}

Deterministic cache key for shaped text.

Uses font swash::CacheKey (u64) which is derived from font data identity, not fontdb::ID which uses slotmap and differs across processes.

Fields

text_hash: u64

Hash of the text content.

font_cache_key: u64

Font swash cache key (identifies font data uniquely).

font_size: u32

Font size in pixels (quantized to 0.5px steps for cache friendliness).

weight: u16

Font weight.

stretch: u16

Font stretch raw value.

style: u8

Font style discriminant.

direction: u8

Direction: 0 = LTR, 1 = RTL.

letter_spacing: i32

Letter spacing (quantized to 1/100px).

word_spacing: i32

Word spacing (quantized to 1/100px).

Implementations

impl CacheKey

pub fn new( text: &str, font_cache_key: u64, font_size: f32, weight: Weight, stretch: Stretch, style: Style, direction: Direction, letter_spacing: f32, word_spacing: f32, ) -> Self

Create a new cache key.

Trait Implementations

impl Clone for CacheKey

fn clone(&self) -> CacheKey

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for CacheKey

impl Debug for CacheKey

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

Formats the value using the given formatter.

impl Eq for CacheKey

impl Hash for CacheKey

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 CacheKey

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

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl StructuralPartialEq for CacheKey