1 /* 2 * Copyright (c) 2003, 2006, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle in the LICENSE file that accompanied this code. 10 * 11 * This code is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * version 2 for more details (a copy is included in the LICENSE file that 15 * accompanied this code). 16 * 17 * You should have received a copy of the GNU General Public License version 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25 26 package sun.font; 27 28 /* 29 * NB the versions that take a char as an int are used by the opentype 30 * layout engine. If that remains in native these methods may not be 31 * needed in the Java class. 32 */ 33 public abstract class CharToGlyphMapper { 34 35 public static final int HI_SURROGATE_START = 0xD800; 36 public static final int HI_SURROGATE_END = 0xDBFF; 37 public static final int LO_SURROGATE_START = 0xDC00; 38 public static final int LO_SURROGATE_END = 0xDFFF; 39 40 public static final int UNINITIALIZED_GLYPH = -1; 41 public static final int INVISIBLE_GLYPH_ID = 0xffff; 42 public static final int INVISIBLE_GLYPHS = 0xfffe; // and above 43 44 protected int missingGlyph = CharToGlyphMapper.UNINITIALIZED_GLYPH; 45 46 public int getMissingGlyphCode() { 47 return missingGlyph; 48 } 49 50 /* Default implementations of these methods may be overridden by 51 * subclasses which have special requirements or optimisations 52 */ 53 54 public boolean canDisplay(char ch) { 55 int glyph = charToGlyph(ch); 56 return glyph != missingGlyph; 57 } 58 59 public boolean canDisplay(int cp) { 60 int glyph = charToGlyph(cp); 61 return glyph != missingGlyph; 62 } 63 64 public int charToGlyph(char unicode) { 65 char[] chars = new char[1]; 66 int[] glyphs = new int[1]; 67 chars[0] = unicode; 68 charsToGlyphs(1, chars, glyphs); 69 return glyphs[0]; 70 } 71 72 public int charToGlyph(int unicode) { 73 int[] chars = new int[1]; 74 int [] glyphs = new int[1]; 75 chars[0] = unicode; 76 charsToGlyphs(1, chars, glyphs); 77 return glyphs[0]; 78 } 79 80 public abstract int getNumGlyphs(); 81 82 public abstract void charsToGlyphs(int count, 83 char[] unicodes, int[] glyphs); 84 85 public abstract boolean charsToGlyphsNS(int count, 86 char[] unicodes, int[] glyphs); 87 88 public abstract void charsToGlyphs(int count, 89 int[] unicodes, int[] glyphs); 90 91 }