NAME

       Font::TTF::Delta - Opentype Device tables

DESCRIPTION

       Each device table corresponds to a set of deltas for a particular point over a range of
       ppem values.

       first
           The first ppem value in the range

       last
           The last ppem value in the range

       val This is an array of deltas corresponding to each ppem in the range between first and
           last inclusive.

       fmt This is the fmt used (log2 of number bits per value) when the device table was read.
           It is recalculated on output.

METHODS

   new
       Creates a new device table

   read
       Reads a device table from the given IO object at the current location

   out($fh, $style)
       Outputs a device table to the given IO object at the current location, or just returns the
       data to be output if $style != 0

   $d->signature()
       Returns a content based identifying string for this delta for compression purposes

   $d->out_xml($context)
       Outputs a delta in XML

AUTHOR

       Martin Hosken <http://scripts.sil.org/FontUtils>.

LICENSING

       Copyright (c) 1998-2016, SIL International (http://www.sil.org)

       This module is released under the terms of the Artistic License 2.0.  For details, see the
       full text of the license in the file LICENSE.