VORG table

Defines vertical origin positions for CFF/CFF2 glyphs used in vertical text layout.

Scope

• Format family: OTF-specific
• Table tag in JSON: VORG

Specs

• https://learn.microsoft.com/en-us/typography/opentype/spec/vorg
• 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": {
    "VORG": {
      "majorVersion": 0,
      "minorVersion": 0,
      "defaultVertOriginY": 0,
      "vertOriginYMetrics": null,
      "numVertOriginYMetrics": 0,
      "_checksum": 0
    }
  }
}

Top-level Fields

• majorVersion - number (0..65535)
• minorVersion - number (0..65535)
• defaultVertOriginY - number (-32768..32767)
• vertOriginYMetrics - implementation-defined
• numVertOriginYMetrics - number (0..65535)

Additional Nested Keys Seen In Implementation

• glyphIndex
• vertOriginY

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.