Struct GlyphSourceOrder 

pub struct GlyphSourceOrder(u64);

An ordered list of glyph sources, most preferred first.

Holds every source, four bits each, in eight bytes. It can be used as a constant and passed by value. A source listed more than once keeps only its first position.

How an order is used depends on the consumer:

• Outlines use one base source per font. This is the first of Glyf, Cff2, Cff and Type1 that the font contains. If Varc comes before the base source, it applies to the glyphs it covers, and its components are drawn from the base source.
• Bitmaps use the first of Sbix, Cbdt and Ebdt that the font contains.
• Glyph extents try each source in the font, in order, until one provides extents for the glyph.

Tuple Fields

0: u64

Implementations

impl GlyphSourceOrder

pub const DEFAULT: Self

The default order for measuring glyphs: sbix, CBDT, COLR, VARC, glyf, CFF2, CFF, then Type 1 charstrings.

Color bitmaps come first, then color glyphs, then outlines with VARC before its base source. EBDT is not included, so monochrome and grayscale bitmaps are used only when a caller asks for them.

pub const ALL: Self

Every source: sbix, CBDT, EBDT, COLR, VARC, glyf, CFF2, CFF, then Type 1 charstrings.

The order of DEFAULT, with EBDT after the color bitmaps.

pub const OUTLINES: Self

The outline sources: VARC, glyf, CFF2, CFF, then Type 1 charstrings.

pub const BASE_OUTLINES: Self

The outline sources without VARC: glyf, CFF2, CFF, then Type 1 charstrings.

Every glyph is drawn from the base source.

pub const BITMAPS: Self

The bitmap sources: sbix, CBDT, then EBDT.

pub const COLOR_BITMAPS: Self

The color bitmap sources: sbix, then CBDT.

pub const MONO_BITMAPS: Self

The monochrome and grayscale bitmap source: EBDT.

pub const COLOR: Self

The color glyph source: COLR.

pub const EMPTY: Self

No sources.

pub(crate) const MAX_LEN: usize

The most sources an order holds: each one at most once.

pub const fn new(sources: &[GlyphSource]) -> Self

Creates an order from sources.

A source listed more than once keeps only its first position.

pub const fn contains(self, source: GlyphSource) -> bool

Returns true if the order contains source.

pub const fn is_empty(self) -> bool

Returns true if the order contains no sources.

pub fn iter(self) -> impl Iterator<Item = GlyphSource>

Returns an iterator over the sources, most preferred first.

Trait Implementations

impl Clone for GlyphSourceOrder

fn clone(&self) -> GlyphSourceOrder

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for GlyphSourceOrder

impl Debug for GlyphSourceOrder

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

Formats the value using the given formatter.

impl Default for GlyphSourceOrder

fn default() -> Self

Returns the “default value” for a type.

impl Eq for GlyphSourceOrder

impl Hash for GlyphSourceOrder

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 GlyphSourceOrder

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for GlyphSourceOrder