ttdebug

ttdebug [options] index size font

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.

-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.