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HarfBuzz includes several auxiliary components in addition to the main APIs. These include a set of command-line tools, a set of lower-level APIs for common data types that may be of interest to client programs, and an embedded library for working with Unicode Character Database (UCD) data.
HarfBuzz include three command-line tools: hb-shape, hb-view, and hb-subset. They can be used to examine HarfBuzz's functionality, debug font binaries, or explore the various shaping models and features from a terminal.
hb-shape allows you to run HarfBuzz's
hb_shape() function on an input string and
to examine the outcome, in human-readable form, as terminal
output. hb-shape does
not render the results of the shaping call
into rendered text (you can use hb-view, below, for
that). Instead, it prints out the final glyph indices and
positions, taking all shaping operations into account, as if the
input string were a HarfBuzz input buffer.
You can specify the font to be used for shaping and, with command-line options, you ca