prep table

Contains the TrueType control value program — hinting instructions executed before each glyph is rendered.

Scope

• Format family: TTF-specific
• Table tag in JSON: prep

Specs

• https://learn.microsoft.com/en-us/typography/opentype/spec/prep
• OpenType table registry: https://learn.microsoft.com/en-us/typography/opentype/spec/otff#font-tables

JSON Skeleton

This skeleton reflects fields currently parsed/written by Font Flux JS for this table.

{
  "tables": {
    "prep": {
      "instructions": null,
      "_checksum": 0
    }
  }
}

Top-level Fields

• instructions - implementation-defined

Additional Nested Keys Seen In Implementation

• None inferred from source.

Notes

• Preserve _checksum for stable round-tripping.
• If a table is only partially understood, prefer keeping unknown bytes in _raw instead of dropping data.
• Validate with .validate() after edits.