Crate ttf_parser

A high-level, safe, zero-allocation TrueType font parser.

Features

• A high-level API, for people who doesn’t know how TrueType works internally. Basically, no direct access to font tables.
• Zero heap allocations.
• Zero unsafe.
• Zero dependencies.
• no_std/WASM compatible.
• Fast.
• Stateless. All parsing methods are immutable methods.
• Simple and maintainable code (no magic numbers).

Safety

• The library must not panic. Any panic considered as a critical bug and should be reported.
• The library forbids the unsafe code.
• No heap allocations, so crash due to OOM is not possible.
• All recursive methods have a depth limit.
• Technically, should use less than 64KiB of stack in worst case scenario.
• Most of arithmetic operations are checked.
• Most of numeric casts are checked.

Modules

cmap

A character to glyph index mapping table implementation.

kern

A kerning table implementation.

name_id

A list of name ID’s.

parser

Binary parsing utils.

Structs

Class

A value of Class Definition Table.

Face

A font face handle.

FaceTables

Parsed face tables.

GlyphId

A type-safe wrapper for glyph ID.

LineMetrics

A line metrics.

Name

A Name Record.

Names

An iterator over font’s names.

NormalizedCoordinate

A variation coordinate in a normalized coordinate system.

RasterGlyphImage

A glyph’s raster image.

Rect

A rectangle.

ScriptMetrics

A script metrics used by subscript and superscript.

Tag

A 4-byte tag.

Variation

A font variation value.

VariationAxes

An iterator over variation axes.

VariationAxis

A variation axis.

Enums

FaceParsingError

A list of font face parsing errors.

GlyphClass

A glyph class.

PlatformId

A platform ID.

RasterImageFormat

A glyph raster image format.

TableName

A table name.

Weight

A font weight.

Width

A font width.

Traits

OutlineBuilder

A trait for glyph outline construction.

Functions

fonts_in_collection

Returns the number of fonts stored in a TrueType font collection.