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, 

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: &SpriteDescriptor) -> bool

This method tests for !=.

impl Copy for SpriteDescriptor

impl Eq for SpriteDescriptor

impl StructuralEq for SpriteDescriptor

impl StructuralPartialEq for SpriteDescriptor