Xtf

Xbox Font Specimen

XTF is a font file format used in the Dashboard. It became famous for being exploited.

Dashboard fonts

The dashboard fonts were designed by Steve Matteson. They contain 7365 glyphs each.

A monospace font.

Xbox.xtf from Dashboard.

XBox Book.xtf from Dashboard.

4 byte (magic)
4 byte (length prefix for following string)
zero-terminated string with given buffer length (font-name)
GLYPHSET (List of supported glyphs)
For each cGlyphsSupported:
- GLYPHMETRICSFLOAT (Metrics for each glyph)
- 4 byte (Offset of glyph in file)
For each GLYPHSET range
- For each glyph in this range
  - 2 byte (Index count)
  - 2 byte (Vertex count)
  - For each index:
    - 2 byte (Vertex index)
  - For each vertex:
    - 4 byte float (X-coordinate)
    - 4 byte float (Y-coordinate)

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