Struct kas_text::raster::SpriteDescriptor

pub struct SpriteDescriptor(_);

A Sprite descriptor

This descriptor includes all important properties of a rastered glyph in a small, easily hashable value. It is thus ideal for caching rastered glyphs in a HashMap.

Implementations

impl SpriteDescriptor

pub fn new(config: &Config, face: FaceId, glyph: Glyph, dpem: f32) -> Self

Construct

Most parameters come from TextDisplay::glyphs output. See also raster.

pub fn face(self) -> FaceId

Get FaceId descriptor

pub fn glyph(self) -> GlyphId

Get GlyphId descriptor

pub fn dpem(self, config: &Config) -> f32

Get scale (pixels per Em)

pub fn fractional_position(self, config: &Config) -> (f32, f32)

Get fractional position

This may optionally be used (depending on Config) to improve letter spacing at small font sizes. Returns the (x, y) offsets in the range 0.0 ≤ x < 1.0 (and the same for y).

Trait Implementations

impl Clone for SpriteDescriptor

fn clone(&self) -> SpriteDescriptor

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for SpriteDescriptor

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

Formats the value using the given formatter.

impl Hash for SpriteDescriptor

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<SpriteDescriptor> for SpriteDescriptor

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

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

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

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

impl Copy for SpriteDescriptor

impl Eq for SpriteDescriptor

impl StructuralEq for SpriteDescriptor

impl StructuralPartialEq for SpriteDescriptor