# phpman > man > Font::TTF::LTSH(3pm)

## NAME
    [Font::TTF::LTSH](https://www.chedong.com/phpMan.php/perldoc/Font%3A%3ATTF%3A%3ALTSH/markdown) - Linear Threshold table

## DESCRIPTION
    Holds the linear threshold for each glyph. This is the ppem value at which a glyph's metrics
    become linear. The value is set to 1 if a glyph's metrics are always linear.

## INSTANCE VARIABLES
    glyphs
        An array of ppem values. One value per glyph

## METHODS
  $t->read
    Reads the table

  $t->out($fh)
    Outputs the LTSH to the given fh.

  $t->minsize()
    Returns the minimum size this table can be. If it is smaller than this, then the table must be
    bad and should be deleted or whatever.

## BUGS
    None known

## 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.