sparkles:font

sparkles:font reads OpenType and TrueType font files in D. It opens a face or a collection over bytes the caller owns, finds its tables, reads the fixed-layout tables as plain structs, maps characters to glyphs, decodes name records and names glyphs. Every read stays inside the caller's buffer, malformed data comes back as a FontError rather than an assertion, and no operation allocates.

This is milestone M1 of the font specification: parsing. Variation, metrics, outlines, shaping, rasterization and discovery are later milestones of the delivery plan. Unicode semantics come from sparkles:base; the library links no C library.

Documentation

• Tutorial: open a face and map text
• How-to: inspect a damaged font
• Reference: modules, operations and errors
• Explanation: borrowing, checking once, and leniency

The operation-level contracts are in parsing.md, and the testing page describes the oracles that check them, including the HarfBuzz differential suite in sparkles:font-oracle.