Crate swash

Font introspection, complex text shaping and glyph rendering.

For a comprehensive list of features provided by this crate, please check out the readme on GitHub.

Note

This is a low level library focusing on implementations of OpenType and various related Unicode specifications for building high quality, high performance text layout and rendering components with minimal overhead.

If you’re looking for something higher level, please stay tuned– work is in progress.

Usage

The primary currency in this crate is the FontRef struct so you’ll want to start there to learn how to construct and use fonts.

Documentation for shaping and scaling is provided in the respective modules.

Re-exports

pub use zeno;

Modules

iter	Collection of various iterators over metadata contained in a font.
proxy	Proxies used to efficiently rematerialize metadata.
scale	Scaling, hinting and rasterization of visual glyph representations.
shape	Mapping complex text to a sequence of positioned glyphs.
text	Character properties and textual analysis.

Structs

Attributes	Primary attributes for font classification: stretch, weight and style.
BitmapStrike	Collection of bitmaps of a specific size and format.
CacheKey	Uniquely generated value for identifying and caching fonts.
Charmap	Maps characters to nominal glyph identifiers.
ColorPalette	Collection of colors.
Feature	Typographic rule that produces modifications to a sequence of glyphs.
FontDataRef	Reference to the content of a font file.
FontRef	Reference to a font.
GlyphMetrics	Glyph advances, side bearings and vertical origins.
Instance	Named instance in a variable font.
LocalizedString	Represents a single localized string in a font.
Metrics	Global font metrics.
ObliqueAngle	Angle of an oblique style in degrees from -90 to 90.
Setting	Setting combining a tag and a value for features and variations.
Stretch	Visual width of a font– a relative change from the normal aspect ratio.
Synthesis	Synthesis suggestions for mistmatched font attributes.
Variation	Axis of variation in a variable font.
Weight	Visual weight class of a font on a scale from 1 to 1000.
WritingSystem	Script, language and associated typographic features available in a font.

Enums

Action	Modification performed by a feature.
StringId	Identifier for well-known localized strings in a font.
Style	Visual style or ‘slope’ of a font.
Usability	Theme of a palette with respect to background color.

Functions

tag_from_bytes	Creates a tag from four bytes.
tag_from_str_lossy	Creates a tag from the first four bytes of a string, inserting spaces for any missing bytes.

Type Definitions

GlyphId	Glyph identifier.
NormalizedCoord	Normalized variation coordinate in 2.14 fixed point format.
Tag	Four byte tag value.