/*
* Copyright (c) 2003, 2006, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code 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
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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*/
package sun.font;
/*
* NB the versions that take a char as an int are used by the opentype
* layout engine. If that remains in native these methods may not be
* needed in the Java class.
*/
public abstract class CharToGlyphMapper {
public static final int HI_SURROGATE_START = 0xD800;
public static final int HI_SURROGATE_END = 0xDBFF;
public static final int LO_SURROGATE_START = 0xDC00;
public static final int LO_SURROGATE_END = 0xDFFF;
public static final int UNINITIALIZED_GLYPH = -1;
public static final int INVISIBLE_GLYPH_ID = 0xffff;
public static final int INVISIBLE_GLYPHS = 0xfffe; // and above
protected int missingGlyph = CharToGlyphMapper.UNINITIALIZED_GLYPH;
public int getMissingGlyphCode() {
return missingGlyph;
}
/* Default implementations of these methods may be overridden by
* subclasses which have special requirements or optimisations
*/
public boolean canDisplay(char ch) {
int glyph = charToGlyph(ch);
return glyph != missingGlyph;
}
public boolean canDisplay(int cp) {
int glyph = charToGlyph(cp);
return glyph != missingGlyph;
}
public int charToGlyph(char unicode) {
char[] chars = new char[1];
int[] glyphs = new int[1];
chars[0] = unicode;
charsToGlyphs(1, chars, glyphs);
return glyphs[0];
}
public int charToGlyph(int unicode) {
int[] chars = new int[1];
int [] glyphs = new int[1];
chars[0] = unicode;
charsToGlyphs(1, chars, glyphs);
return glyphs[0];
}
public abstract int getNumGlyphs();
public abstract void charsToGlyphs(int count,
char[] unicodes, int[] glyphs);
public abstract boolean charsToGlyphsNS(int count,
char[] unicodes, int[] glyphs);
public abstract void charsToGlyphs(int count,
int[] unicodes, int[] glyphs);
}