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 | import java.nio.ByteBuffer; |
| 29 | import java.util.Locale; |
| 30 | |
| 31 | public class TrueTypeGlyphMapper extends CharToGlyphMapper { |
| 32 | |
| 33 | static final char REVERSE_SOLIDUS = 0x005c; // the backslash char. |
| 34 | static final char JA_YEN = 0x00a5; |
| 35 | static final char JA_FULLWIDTH_TILDE_CHAR = 0xff5e; |
| 36 | static final char JA_WAVE_DASH_CHAR = 0x301c; |
| 37 | |
| 38 | /* if running on Solaris and default Locale is ja_JP then |
| 39 | * we map need to remap reverse solidus (backslash) to Yen as |
| 40 | * apparently expected there. |
| 41 | */ |
| 42 | static final boolean isJAlocale = Locale.JAPAN.equals(Locale.getDefault()); |
| 43 | private final boolean needsJAremapping; |
| 44 | private boolean remapJAWaveDash; |
| 45 | |
| 46 | TrueTypeFont font; |
| 47 | CMap cmap; |
| 48 | int numGlyphs; |
| 49 | |
| 50 | public TrueTypeGlyphMapper(TrueTypeFont font) { |
| 51 | this.font = font; |
| 52 | try { |
| 53 | cmap = CMap.initialize(font); |
| 54 | } catch (Exception e) { |
| 55 | cmap = null; |
| 56 | } |
| 57 | if (cmap == null) { |
| 58 | handleBadCMAP(); |
| 59 | } |
| 60 | missingGlyph = 0; /* standard for TrueType fonts */ |
| 61 | ByteBuffer buffer = font.getTableBuffer(TrueTypeFont.maxpTag); |
| 62 | numGlyphs = buffer.getChar(4); // offset 4 bytes in MAXP table. |
| 63 | if (FontManager.isSolaris && isJAlocale && font.supportsJA()) { |
| 64 | needsJAremapping = true; |
| 65 | if (FontManager.isSolaris8 && |
| 66 | getGlyphFromCMAP(JA_WAVE_DASH_CHAR) == missingGlyph) { |
| 67 | remapJAWaveDash = true; |
| 68 | } |
| 69 | } else { |
| 70 | needsJAremapping = false; |
| 71 | } |
| 72 | } |
| 73 | |
| 74 | public int getNumGlyphs() { |
| 75 | return numGlyphs; |
| 76 | } |
| 77 | |
| 78 | private char getGlyphFromCMAP(int charCode) { |
| 79 | try { |
| 80 | char glyphCode = cmap.getGlyph(charCode); |
| 81 | if (glyphCode < numGlyphs || |
| 82 | glyphCode >= FileFontStrike.INVISIBLE_GLYPHS) { |
| 83 | return glyphCode; |
| 84 | } else { |
| 85 | if (FontManager.logging) { |
| 86 | FontManager.logger.warning |
| 87 | (font + " out of range glyph id=" + |
| 88 | Integer.toHexString((int)glyphCode) + |
| 89 | " for char " + Integer.toHexString(charCode)); |
| 90 | } |
| 91 | return (char)missingGlyph; |
| 92 | } |
| 93 | } catch(Exception e) { |
| 94 | handleBadCMAP(); |
| 95 | return (char) missingGlyph; |
| 96 | } |
| 97 | } |
| 98 | |
| 99 | private void handleBadCMAP() { |
| 100 | if (FontManager.logging) { |
| 101 | FontManager.logger.severe("Null Cmap for " + font + |
| 102 | "substituting for this font"); |
| 103 | } |
| 104 | FontManager.deRegisterBadFont(font); |
| 105 | /* The next line is not really a solution, but might |
| 106 | * reduce the exceptions until references to this font2D |
| 107 | * are gone. |
| 108 | */ |
| 109 | cmap = CMap.theNullCmap; |
| 110 | } |
| 111 | |
| 112 | private final char remapJAChar(char unicode) { |
| 113 | switch (unicode) { |
| 114 | case REVERSE_SOLIDUS: |
| 115 | return JA_YEN; |
| 116 | /* This is a workaround for bug 4533422. |
| 117 | * Japanese wave dash missing from Solaris JA TrueType fonts. |
| 118 | */ |
| 119 | case JA_WAVE_DASH_CHAR: |
| 120 | if (remapJAWaveDash) { |
| 121 | return JA_FULLWIDTH_TILDE_CHAR; |
| 122 | } |
| 123 | default: return unicode; |
| 124 | } |
| 125 | } |
| 126 | private final int remapJAIntChar(int unicode) { |
| 127 | switch (unicode) { |
| 128 | case REVERSE_SOLIDUS: |
| 129 | return JA_YEN; |
| 130 | /* This is a workaround for bug 4533422. |
| 131 | * Japanese wave dash missing from Solaris JA TrueType fonts. |
| 132 | */ |
| 133 | case JA_WAVE_DASH_CHAR: |
| 134 | if (remapJAWaveDash) { |
| 135 | return JA_FULLWIDTH_TILDE_CHAR; |
| 136 | } |
| 137 | default: return unicode; |
| 138 | } |
| 139 | } |
| 140 | |
| 141 | public int charToGlyph(char unicode) { |
| 142 | if (needsJAremapping) { |
| 143 | unicode = remapJAChar(unicode); |
| 144 | } |
| 145 | int glyph = getGlyphFromCMAP(unicode); |
| 146 | if (font.checkUseNatives() && glyph < font.glyphToCharMap.length) { |
| 147 | font.glyphToCharMap[glyph] = unicode; |
| 148 | } |
| 149 | return glyph; |
| 150 | } |
| 151 | |
| 152 | public int charToGlyph(int unicode) { |
| 153 | if (needsJAremapping) { |
| 154 | unicode = remapJAIntChar(unicode); |
| 155 | } |
| 156 | int glyph = getGlyphFromCMAP(unicode); |
| 157 | if (font.checkUseNatives() && glyph < font.glyphToCharMap.length) { |
| 158 | font.glyphToCharMap[glyph] = (char)unicode; |
| 159 | } |
| 160 | return glyph; |
| 161 | } |
| 162 | |
| 163 | public void charsToGlyphs(int count, int[] unicodes, int[] glyphs) { |
| 164 | for (int i=0;i<count;i++) { |
| 165 | if (needsJAremapping) { |
| 166 | glyphs[i] = getGlyphFromCMAP(remapJAIntChar(unicodes[i])); |
| 167 | } else { |
| 168 | glyphs[i] = getGlyphFromCMAP(unicodes[i]); |
| 169 | } |
| 170 | if (font.checkUseNatives() && |
| 171 | glyphs[i] < font.glyphToCharMap.length) { |
| 172 | font.glyphToCharMap[glyphs[i]] = (char)unicodes[i]; |
| 173 | } |
| 174 | } |
| 175 | } |
| 176 | |
| 177 | public void charsToGlyphs(int count, char[] unicodes, int[] glyphs) { |
| 178 | |
| 179 | for (int i=0; i<count; i++) { |
| 180 | int code; |
| 181 | if (needsJAremapping) { |
| 182 | code = remapJAChar(unicodes[i]); |
| 183 | } else { |
| 184 | code = unicodes[i]; // char is unsigned. |
| 185 | } |
| 186 | |
| 187 | if (code >= HI_SURROGATE_START && |
| 188 | code <= HI_SURROGATE_END && i < count - 1) { |
| 189 | char low = unicodes[i + 1]; |
| 190 | |
| 191 | if (low >= LO_SURROGATE_START && |
| 192 | low <= LO_SURROGATE_END) { |
| 193 | code = (code - HI_SURROGATE_START) * |
| 194 | 0x400 + low - LO_SURROGATE_START + 0x10000; |
| 195 | |
| 196 | glyphs[i] = getGlyphFromCMAP(code); |
| 197 | i += 1; // Empty glyph slot after surrogate |
| 198 | glyphs[i] = INVISIBLE_GLYPH_ID; |
| 199 | continue; |
| 200 | } |
| 201 | } |
| 202 | glyphs[i] = getGlyphFromCMAP(code); |
| 203 | |
| 204 | if (font.checkUseNatives() && |
| 205 | glyphs[i] < font.glyphToCharMap.length) { |
| 206 | font.glyphToCharMap[glyphs[i]] = (char)code; |
| 207 | } |
| 208 | |
| 209 | } |
| 210 | } |
| 211 | |
| 212 | /* This variant checks if shaping is needed and immediately |
| 213 | * returns true if it does. A caller of this method should be expecting |
| 214 | * to check the return type because it needs to know how to handle |
| 215 | * the character data for display. |
| 216 | */ |
| 217 | public boolean charsToGlyphsNS(int count, char[] unicodes, int[] glyphs) { |
| 218 | |
| 219 | for (int i=0; i<count; i++) { |
| 220 | int code; |
| 221 | if (needsJAremapping) { |
| 222 | code = remapJAChar(unicodes[i]); |
| 223 | } else { |
| 224 | code = unicodes[i]; // char is unsigned. |
| 225 | } |
| 226 | |
| 227 | if (code >= HI_SURROGATE_START && |
| 228 | code <= HI_SURROGATE_END && i < count - 1) { |
| 229 | char low = unicodes[i + 1]; |
| 230 | |
| 231 | if (low >= LO_SURROGATE_START && |
| 232 | low <= LO_SURROGATE_END) { |
| 233 | code = (code - HI_SURROGATE_START) * |
| 234 | 0x400 + low - LO_SURROGATE_START + 0x10000; |
| 235 | glyphs[i + 1] = INVISIBLE_GLYPH_ID; |
| 236 | } |
| 237 | } |
| 238 | |
| 239 | glyphs[i] = getGlyphFromCMAP(code); |
| 240 | if (font.checkUseNatives() && |
| 241 | glyphs[i] < font.glyphToCharMap.length) { |
| 242 | font.glyphToCharMap[glyphs[i]] = (char)code; |
| 243 | } |
| 244 | |
| 245 | if (code < FontManager.MIN_LAYOUT_CHARCODE) { |
| 246 | continue; |
| 247 | } |
| 248 | else if (FontManager.isComplexCharCode(code)) { |
| 249 | return true; |
| 250 | } |
| 251 | else if (code >= 0x10000) { |
| 252 | i += 1; // Empty glyph slot after surrogate |
| 253 | continue; |
| 254 | } |
| 255 | } |
| 256 | |
| 257 | return false; |
| 258 | } |
| 259 | |
| 260 | /* A pretty good heuristic is that the cmap we are using |
| 261 | * supports 32 bit character codes. |
| 262 | */ |
| 263 | boolean hasSupplementaryChars() { |
| 264 | return |
| 265 | cmap instanceof CMap.CMapFormat8 || |
| 266 | cmap instanceof CMap.CMapFormat10 || |
| 267 | cmap instanceof CMap.CMapFormat12; |
| 268 | } |
| 269 | } |