| J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 2003-2006 Sun Microsystems, Inc. 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. Sun designates this |
| 8 | * particular file as subject to the "Classpath" exception as provided |
| 9 | * by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| 22 | * CA 95054 USA or visit www.sun.com if you need additional information or |
| 23 | * have any 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 | } |