| /* |
| * 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 |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| 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); |
| |
| } |