TTDEBUG(1)                  General Commands Manual                 TTDEBUG(1)

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.

       -a axis1,axis2,...
              Specify the design coordinates for each variation axis at start-
              up.

       -v     Show version.

FreeType 2.14.3                   March 2026                        TTDEBUG(1)