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CentOS 7.0 - man page for font::ttf::cmap (centos section 3)

Font::TTF::Cmap(3)	       User Contributed Perl Documentation	       Font::TTF::Cmap(3)

NAME
       Font::TTF::Cmap - Character map table

DESCRIPTION
       Looks after the character map. For ease of use, the actual cmap is held in a hash against
       codepoint. Thus for a given table:

	   $gid = $font->{'cmap'}{'Tables'}[0]{'val'}{$code};

       Note that $code should be a true value (0x1234) rather than a string representation.

INSTANCE VARIABLES
       The instance variables listed here are not preceeded by a space due to their emulating
       structural information in the font.

       Num Number of subtables in this table

       Tables
	   An array of subtables ([0..Num-1])

       Each subtables also has its own instance variables which are, again, not preceeded by a
       space.

       Platform
	   The platform number for this subtable

       Encoding
	   The encoding number for this subtable

       Format
	   Gives the stored format of this subtable

       Ver Gives the version (or language) information for this subtable

       val A hash keyed by the codepoint value (not a string) storing the glyph id

METHODS
   $t->read
       Reads the cmap into memory. Format 4 subtables read the whole subtable and fill in the
       segmented array accordingly.

   $t->ms_lookup($uni)
       Finds a Unicode table, giving preference to the MS one, and looks up the given Unicode
       codepoint in it to find the glyph id.

   $t->find_ms
       Finds the a Unicode table, giving preference to the Microsoft one, and sets the "mstable"
       instance variable to it if found. Returns the table it finds.

   $t->ms_enc
       Returns the encoding of the microsoft table (0 => symbol, etc.). Returns undef if there is
       no Microsoft cmap.

   $t->out($fh)
       Writes out a cmap table to a filehandle. If it has not been read, then just copies from
       input file to output

   $t->XML_element($context, $depth, $name, $val)
       Outputs the elements of the cmap in XML. We only need to process val here

   $t->update
       Tidies the cmap table.

       Removes MS Fmt12 cmap if it is no longer needed.

       Removes from all cmaps any codepoint that map to GID=0. Note that such entries will be re-
       introduced as necessary depending on the cmap format.

   @map = $t->reverse(%opt)
       Returns a reverse map of the Unicode cmap. I.e. given a glyph gives the Unicode value for
       it. Options are:

       tnum
	   Table number to use rather than the default Unicode table

       array
	   Returns each element of reverse as an array since a glyph may be mapped by more than
	   one Unicode value. The arrays are unsorted. Otherwise store any one unicode value for
	   a glyph.

   is_unicode($index)
       Returns whether the table of a given index is known to be a unicode table (as specified in
       the specifications)

BUGS
       o   No support for format 2 tables (MBCS)

AUTHOR
       Martin Hosken Martin_Hosken@sil.org. See Font::TTF::Font for copyright and licensing.

perl v5.16.3				    2012-02-23			       Font::TTF::Cmap(3)


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