font::ttf::ttc(3)
NAME
Font::TTF::Ttc - Truetype Collection class
DESCRIPTION
A TrueType collection is a collection of TrueType fonts in
one file in which tables may be shared between different
directories. In order to support this, the TTC introduces
the concept of a table being shared by different TrueType
fonts. This begs the question of what should happen to the
' PARENT' property of a particular table. It is made to
point to the first directory object which refers to it. It
is therefore up to the application to sort out any confu
sion. Confusion only occurs if shared tables require
access to non-shared tables. This should not happen since
the shared tables are dealing with glyph information only
and the private tables are dealing with encoding and glyph
identification. Thus the general direction is from identi
fication to glyph and not the other way around (at least
not without knowledge of the particular context).
INSTANCE VARIABLES
The following instance variables are preceded by a space
- fname (P)
- Filename for this TrueType Collection
- INFILE (P)
- The filehandle of this collection
- The following instance variable does not start with a
space - directs
- An array of directories (Font::TTF::Font objects) for
each sub-font in the directory
METHODS
Font::TTF::Ttc->open($fname)
Opens and reads the given filename as a TrueType Collec
tion. Reading a collection involves reading each of the
directories which go to make up the collection.
$c->read
Reads a Collection by reading all the directories in the
collection
$c->find($direct, $name, $check, $off, $len)
Hunts around to see if a table with the given characteris
tics of name, checksum, offset and length has been associ
ated with a directory earlier in the list. Actually on
checks the offset since no two tables can share the same
offset in a TrueType font, collection or otherwise.
$c->DESTROY
Closees any opened files by us
BUGS
No known bugs, but then not ever executed!
AUTHOR
- Martin Hosken Martin_Hosken@sil.org. See Font::TTF::Font
for copyright and licensing.