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.
• 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.