Difference between revisions of "Xtf"

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(Ascender did not even exist at the time;; We already link to wikipedia which contains these non-technical, non-xbox details;; XTF is triangle lists, not strips)
m (Fix 404 GitHub link)
 
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** 4 byte (Offset of glyph in file)
 
** 4 byte (Offset of glyph in file)
 
* For each GLYPHSET range
 
* For each GLYPHSET range
** For each glyph in this range (stored as a triangle list)
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** For each glyph in this range
 
*** 2 byte (Index count)
 
*** 2 byte (Index count)
 
*** 2 byte (Vertex count)
 
*** 2 byte (Vertex count)
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**** 4 byte float (Y-coordinate)
 
**** 4 byte float (Y-coordinate)
  
 
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The mesh data is stored as triangle list. 3 indices per triangle.
  
 
{{FIXME|reason=Confirm these findings and format them better}}
 
{{FIXME|reason=Confirm these findings and format them better}}
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== Links ==
 
== Links ==
  
* [https://github.com/JayFoxRox/xbox-tools/tree/master/xtf-converter A tool to convert XTF fonts to SVG fonts]
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* [https://github.com/XboxDev/xtf-converter A tool to convert XTF fonts to SVG fonts]
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[[Category:Fileformats]]

Latest revision as of 09:12, 2 June 2020

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

Dashboard fonts

The fonts were designed by Steve Matteson for use in the Xbox Dashboard as well as for promotional materials.

The XTF versions of these fonts contain 7365 glyphs each.

Xbox.xtf

Xbox Font Specimen

A monospace font.

Xbox.xtf from Dashboard.

XBox Book.xtf

XBox Book.xtf from Dashboard.

File format

  • 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:
  • 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)

The mesh data is stored as triangle list. 3 indices per triangle.

[FIXME]

Links