gnu.java.awt.font.opentype
Class CharGlyphMap
A mapping from Unicode codepoints to glyphs. This mapping
does not perform any re-ordering or decomposition, so it
is not everything that is needed to support Unicode.
This class manages the
cmap table of
OpenType and TrueType fonts.
static CharGlyphMap | forTable(ByteBuffer buf)- Reads a CharGlyphMap from an OpenType or TrueType
cmap
table.
|
abstract int | getGlyph(int ucs4)- Determines the glyph index for a given Unicode codepoint.
|
clone, equals, extends Object> getClass, finalize, hashCode, notify, notifyAll, toString, wait, wait, wait |
forTable
public static CharGlyphMap forTable(ByteBuffer buf)
Reads a CharGlyphMap from an OpenType or TrueType
cmap
table. The current implementation works as follows:
- If the font has a type 4 cmap for the Unicode platform
(encoding 0, 1, 2, 3 or 4), or a type 4 cmap for the Microsoft
platform (encodings 1 or 10), that table is used to map Unicode
codepoints to glyphs. Most recent fonts, both for Macintosh and
Windows, should provide such a table.
- Otherwise, if the font has any type 0 cmap for the Macintosh
platform, a Unicode-to-glyph mapping is synthesized from certain
type 0 cmaps. The current implementation collects mappings from
Roman, Icelandic, Turkish, Croatian, Romanian, Eastern European,
Cyrillic, Greek, Hebrew, Arabic and Farsi cmaps.
buf - a buffer whose position is right at the start
of the entire cmap table, and whose limit
is at its end.
- a concrete subclass of
CharGlyphMap
that performs the mapping.
getGlyph
public abstract int getGlyph(int ucs4)
Determines the glyph index for a given Unicode codepoint. Users
should be aware that the character-to-glyph mapping not not
everything that is needed for full Unicode support. For example,
the cmap table is not able to synthesize accented
glyphs from the canonical decomposition sequence, even if the
font would contain a glyph for the composed form.
ucs4 - the Unicode codepoint in UCS-4 encoding. Surrogates
(U+D800 to U+DFFF) cannot be passed, they must be mapped to
UCS-4 first.
- the glyph index, or 0 if the font does not contain
a glyph for this codepoint.
CharGlyphMap.java -- Manages the 'cmap' table of TrueType fonts
Copyright (C) 2006 Free Software Foundation, Inc.
This file is part of GNU Classpath.
GNU Classpath is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.
GNU Classpath is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License
along with GNU Classpath; see the file COPYING. If not, write to the
Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
02110-1301 USA.
Linking this library statically or dynamically with other modules is
making a combined work based on this library. Thus, the terms and
conditions of the GNU General Public License cover the whole
combination.
As a special exception, the copyright holders of this library give you
permission to link this library with independent modules to produce an
executable, regardless of the license terms of these independent
modules, and to copy and distribute the resulting executable under
terms of your choice, provided that you also meet, for each linked
independent module, the terms and conditions of the license of that
module. An independent module is a module which is not derived from
or based on this library. If you modify this library, you may extend
this exception to your version of the library, but you are not
obligated to do so. If you do not wish to do so, delete this
exception statement from your version.