01: /*
02: * Copyright 2003-2006 Sun Microsystems, Inc. All Rights Reserved.
03: * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
04: *
05: * This code is free software; you can redistribute it and/or modify it
06: * under the terms of the GNU General Public License version 2 only, as
07: * published by the Free Software Foundation. Sun designates this
08: * particular file as subject to the "Classpath" exception as provided
09: * 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, char[] unicodes,
83: int[] glyphs);
84:
85: public abstract boolean charsToGlyphsNS(int count, char[] unicodes,
86: int[] glyphs);
87:
88: public abstract void charsToGlyphs(int count, int[] unicodes,
89: int[] glyphs);
90:
91: }
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