Provided by: freetype2-demos_2.13.3+dfsg-1_amd64 
NAME
ttdebug - a TrueType bytecode debugger
SYNOPSIS
ttdebug [options] index size font
DESCRIPTION
ttdebug is an interactive TrueType bytecode debugger working in a terminal. Its spartanic interface
faintly resembles debuggers like gdb.
For the specified font, a glyph with the given index and size is loaded, making it possible to trace the
bytecode execution step by step.
This program is part of the FreeType demos package.
OPTIONS
-I ver Use TrueType interpreter version ver. Available versions are depending on compilation options of
FreeType; call ttdebug without an argument to get the actual list.
-f face_index
To access member font face_index (default zero) in TTCs.
-d "axis1 axis2 ..."
Specify the design coordinates for each variation axis at start-up.
-v Show version.