1 /* 2 * Copyright (c) 2003, 2013, 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 import java.nio.ByteBuffer; 29 import java.nio.CharBuffer; 30 import java.nio.IntBuffer; 31 import java.util.Locale; 32 import java.nio.charset.*; 33 34 /* 35 * A tt font has a CMAP table which is in turn made up of sub-tables which 36 * describe the char to glyph mapping in (possibly) multiple ways. 37 * CMAP subtables are described by 3 values. 38 * 1. Platform ID (eg 3=Microsoft, which is the id we look for in JDK) 39 * 2. Encoding (eg 0=symbol, 1=unicode) 40 * 3. TrueType subtable format (how the char->glyph mapping for the encoding 41 * is stored in the subtable). See the TrueType spec. Format 4 is required 42 * by MS in fonts for windows. Its uses segmented mapping to delta values. 43 * Most typically we see are (3,1,4) : 44 * CMAP Platform ID=3 is what we use. 45 * Encodings that are used in practice by JDK on Solaris are 46 * symbol (3,0) 47 * unicode (3,1) 48 * GBK (3,5) (note that solaris zh fonts report 3,4 but are really 3,5) 49 * The format for almost all subtables is 4. However the solaris (3,5) 50 * encodings are typically in format 2. 51 */ 52 abstract class CMap { 53 54 // static char WingDings_b2c[] = { 55 // 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 56 // 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 57 // 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 58 // 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 59 // 0xfffd, 0xfffd, 0x2702, 0x2701, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 60 // 0xfffd, 0x2706, 0x2709, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 61 // 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 62 // 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0x2707, 0x270d, 63 // 0xfffd, 0x270c, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 64 // 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 65 // 0xfffd, 0x2708, 0xfffd, 0xfffd, 0x2744, 0xfffd, 0x271e, 0xfffd, 66 // 0x2720, 0x2721, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 67 // 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 68 // 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 69 // 0xfffd, 0x2751, 0x2752, 0xfffd, 0xfffd, 0x2756, 0xfffd, 0xfffd, 70 // 0xfffd, 0xfffd, 0xfffd, 0x2740, 0x273f, 0x275d, 0x275e, 0xfffd, 71 // 0xfffd, 0x2780, 0x2781, 0x2782, 0x2783, 0x2784, 0x2785, 0x2786, 72 // 0x2787, 0x2788, 0x2789, 0xfffd, 0x278a, 0x278b, 0x278c, 0x278d, 73 // 0x278e, 0x278f, 0x2790, 0x2791, 0x2792, 0x2793, 0xfffd, 0xfffd, 74 // 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 75 // 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0x274d, 0xfffd, 76 // 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0x2736, 0x2734, 0xfffd, 0x2735, 77 // 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0x272a, 0x2730, 0xfffd, 78 // 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 79 // 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0x27a5, 0xfffd, 0x27a6, 0xfffd, 80 // 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 81 // 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 82 // 0x27a2, 0xfffd, 0xfffd, 0xfffd, 0x27b3, 0xfffd, 0xfffd, 0xfffd, 83 // 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 84 // 0x27a1, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 85 // 0x27a9, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 86 // 0xfffd, 0xfffd, 0xfffd, 0x2717, 0x2713, 0xfffd, 0xfffd, 0xfffd, 87 // }; 88 89 // static char Symbols_b2c[] = { 90 // 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 91 // 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 92 // 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 93 // 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 94 // 0xfffd, 0xfffd, 0x2200, 0xfffd, 0x2203, 0xfffd, 0xfffd, 0x220d, 95 // 0xfffd, 0xfffd, 0x2217, 0xfffd, 0xfffd, 0x2212, 0xfffd, 0xfffd, 96 // 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 97 // 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 98 // 0x2245, 0x0391, 0x0392, 0x03a7, 0x0394, 0x0395, 0x03a6, 0x0393, 99 // 0x0397, 0x0399, 0x03d1, 0x039a, 0x039b, 0x039c, 0x039d, 0x039f, 100 // 0x03a0, 0x0398, 0x03a1, 0x03a3, 0x03a4, 0x03a5, 0x03c2, 0x03a9, 101 // 0x039e, 0x03a8, 0x0396, 0xfffd, 0x2234, 0xfffd, 0x22a5, 0xfffd, 102 // 0xfffd, 0x03b1, 0x03b2, 0x03c7, 0x03b4, 0x03b5, 0x03c6, 0x03b3, 103 // 0x03b7, 0x03b9, 0x03d5, 0x03ba, 0x03bb, 0x03bc, 0x03bd, 0x03bf, 104 // 0x03c0, 0x03b8, 0x03c1, 0x03c3, 0x03c4, 0x03c5, 0x03d6, 0x03c9, 105 // 0x03be, 0x03c8, 0x03b6, 0xfffd, 0xfffd, 0xfffd, 0x223c, 0xfffd, 106 // 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 107 // 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 108 // 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 109 // 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 110 // 0xfffd, 0x03d2, 0xfffd, 0x2264, 0x2215, 0x221e, 0xfffd, 0xfffd, 111 // 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 112 // 0x2218, 0xfffd, 0xfffd, 0x2265, 0xfffd, 0x221d, 0xfffd, 0x2219, 113 // 0xfffd, 0x2260, 0x2261, 0x2248, 0x22ef, 0x2223, 0xfffd, 0xfffd, 114 // 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0x2297, 0x2295, 0x2205, 0x2229, 115 // 0x222a, 0x2283, 0x2287, 0x2284, 0x2282, 0x2286, 0x2208, 0x2209, 116 // 0xfffd, 0x2207, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0x221a, 0x22c5, 117 // 0xfffd, 0x2227, 0x2228, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 118 // 0x22c4, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0x2211, 0xfffd, 0xfffd, 119 // 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 120 // 0xfffd, 0xfffd, 0x222b, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 121 // 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 122 // }; 123 124 static final short ShiftJISEncoding = 2; 125 static final short GBKEncoding = 3; 126 static final short Big5Encoding = 4; 127 static final short WansungEncoding = 5; 128 static final short JohabEncoding = 6; 129 static final short MSUnicodeSurrogateEncoding = 10; 130 131 static final char noSuchChar = (char)0xfffd; 132 static final int SHORTMASK = 0x0000ffff; 133 static final int INTMASK = 0x7fffffff; 134 135 static final char[][] converterMaps = new char[7][]; 136 137 /* 138 * Unicode->other encoding translation array. A pre-computed look up 139 * which can be shared across all fonts using that encoding. 140 * Using this saves running character coverters repeatedly. 141 */ 142 char[] xlat; 143 UVS uvs = null; 144 initialize(TrueTypeFont font)145 static CMap initialize(TrueTypeFont font) { 146 147 CMap cmap = null; 148 149 int offset, platformID, encodingID=-1; 150 151 int three0=0, three1=0, three2=0, three3=0, three4=0, three5=0, 152 three6=0, three10=0; 153 int zero5 = 0; // for Unicode Variation Sequences 154 boolean threeStar = false; 155 156 ByteBuffer cmapBuffer = font.getTableBuffer(TrueTypeFont.cmapTag); 157 int cmapTableOffset = font.getTableSize(TrueTypeFont.cmapTag); 158 short numberSubTables = cmapBuffer.getShort(2); 159 160 /* locate the offsets of all 3,* (ie Microsoft platform) encodings */ 161 for (int i=0; i<numberSubTables; i++) { 162 cmapBuffer.position(i * 8 + 4); 163 platformID = cmapBuffer.getShort(); 164 if (platformID == 3) { 165 threeStar = true; 166 encodingID = cmapBuffer.getShort(); 167 offset = cmapBuffer.getInt(); 168 switch (encodingID) { 169 case 0: three0 = offset; break; // MS Symbol encoding 170 case 1: three1 = offset; break; // MS Unicode cmap 171 case 2: three2 = offset; break; // ShiftJIS cmap. 172 case 3: three3 = offset; break; // GBK cmap 173 case 4: three4 = offset; break; // Big 5 cmap 174 case 5: three5 = offset; break; // Wansung 175 case 6: three6 = offset; break; // Johab 176 case 10: three10 = offset; break; // MS Unicode surrogates 177 } 178 } else if (platformID == 0) { 179 encodingID = cmapBuffer.getShort(); 180 offset = cmapBuffer.getInt(); 181 if (encodingID == 5) { 182 zero5 = offset; 183 } 184 } 185 } 186 187 /* This defines the preference order for cmap subtables */ 188 if (threeStar) { 189 if (three10 != 0) { 190 cmap = createCMap(cmapBuffer, three10, null); 191 } 192 else if (three0 != 0) { 193 /* The special case treatment of these fonts leads to 194 * anomalies where a user can view "wingdings" and "wingdings2" 195 * and the latter shows all its code points in the unicode 196 * private use area at 0xF000->0XF0FF and the former shows 197 * a scattered subset of its glyphs that are known mappings to 198 * unicode code points. 199 * The primary purpose of these mappings was to facilitate 200 * display of symbol chars etc in composite fonts, however 201 * this is not needed as all these code points are covered 202 * by some other platform symbol font. 203 * Commenting this out reduces the role of these two files 204 * (assuming that they continue to be used in font.properties) 205 * to just one of contributing to the overall composite 206 * font metrics, and also AWT can still access the fonts. 207 * Clients which explicitly accessed these fonts as names 208 * "Symbol" and "Wingdings" (ie as physical fonts) and 209 * expected to see a scattering of these characters will 210 * see them now as missing. How much of a problem is this? 211 * Perhaps we could still support this mapping just for 212 * "Symbol.ttf" but I suspect some users would prefer it 213 * to be mapped in to the Latin range as that is how 214 * the "symbol" font is used in native apps. 215 */ 216 // String name = font.platName.toLowerCase(Locale.ENGLISH); 217 // if (name.endsWith("symbol.ttf")) { 218 // cmap = createSymbolCMap(cmapBuffer, three0, Symbols_b2c); 219 // } else if (name.endsWith("wingding.ttf")) { 220 // cmap = createSymbolCMap(cmapBuffer, three0, WingDings_b2c); 221 // } else { 222 cmap = createCMap(cmapBuffer, three0, null); 223 // } 224 } 225 else if (three1 != 0) { 226 cmap = createCMap(cmapBuffer, three1, null); 227 } 228 else if (three2 != 0) { 229 cmap = createCMap(cmapBuffer, three2, 230 getConverterMap(ShiftJISEncoding)); 231 } 232 else if (three3 != 0) { 233 cmap = createCMap(cmapBuffer, three3, 234 getConverterMap(GBKEncoding)); 235 } 236 else if (three4 != 0) { 237 /* GB2312 TrueType fonts on Solaris have wrong encoding ID for 238 * cmap table, these fonts have EncodingID 4 which is Big5 239 * encoding according the TrueType spec, but actually the 240 * fonts are using gb2312 encoding, have to use this 241 * workaround to make Solaris zh_CN locale work. -sherman 242 */ 243 if (FontUtilities.isSolaris && font.platName != null && 244 (font.platName.startsWith( 245 "/usr/openwin/lib/locale/zh_CN.EUC/X11/fonts/TrueType") || 246 font.platName.startsWith( 247 "/usr/openwin/lib/locale/zh_CN/X11/fonts/TrueType") || 248 font.platName.startsWith( 249 "/usr/openwin/lib/locale/zh/X11/fonts/TrueType"))) { 250 cmap = createCMap(cmapBuffer, three4, 251 getConverterMap(GBKEncoding)); 252 } 253 else { 254 cmap = createCMap(cmapBuffer, three4, 255 getConverterMap(Big5Encoding)); 256 } 257 } 258 else if (three5 != 0) { 259 cmap = createCMap(cmapBuffer, three5, 260 getConverterMap(WansungEncoding)); 261 } 262 else if (three6 != 0) { 263 cmap = createCMap(cmapBuffer, three6, 264 getConverterMap(JohabEncoding)); 265 } 266 } else { 267 /* No 3,* subtable was found. Just use whatever is the first 268 * table listed. Not very useful but maybe better than 269 * rejecting the font entirely? 270 */ 271 cmap = createCMap(cmapBuffer, cmapBuffer.getInt(8), null); 272 } 273 // For Unicode Variation Sequences 274 if (cmap != null && zero5 != 0) { 275 cmap.createUVS(cmapBuffer, zero5); 276 } 277 return cmap; 278 } 279 280 /* speed up the converting by setting the range for double 281 * byte characters; 282 */ getConverter(short encodingID)283 static char[] getConverter(short encodingID) { 284 int dBegin = 0x8000; 285 int dEnd = 0xffff; 286 String encoding; 287 288 switch (encodingID) { 289 case ShiftJISEncoding: 290 dBegin = 0x8140; 291 dEnd = 0xfcfc; 292 encoding = "SJIS"; 293 break; 294 case GBKEncoding: 295 dBegin = 0x8140; 296 dEnd = 0xfea0; 297 encoding = "GBK"; 298 break; 299 case Big5Encoding: 300 dBegin = 0xa140; 301 dEnd = 0xfefe; 302 encoding = "Big5"; 303 break; 304 case WansungEncoding: 305 dBegin = 0xa1a1; 306 dEnd = 0xfede; 307 encoding = "EUC_KR"; 308 break; 309 case JohabEncoding: 310 dBegin = 0x8141; 311 dEnd = 0xfdfe; 312 encoding = "Johab"; 313 break; 314 default: 315 return null; 316 } 317 318 try { 319 char[] convertedChars = new char[65536]; 320 for (int i=0; i<65536; i++) { 321 convertedChars[i] = noSuchChar; 322 } 323 324 byte[] inputBytes = new byte[(dEnd-dBegin+1)*2]; 325 char[] outputChars = new char[(dEnd-dBegin+1)]; 326 327 int j = 0; 328 int firstByte; 329 if (encodingID == ShiftJISEncoding) { 330 for (int i = dBegin; i <= dEnd; i++) { 331 firstByte = (i >> 8 & 0xff); 332 if (firstByte >= 0xa1 && firstByte <= 0xdf) { 333 //sjis halfwidth katakana 334 inputBytes[j++] = (byte)0xff; 335 inputBytes[j++] = (byte)0xff; 336 } else { 337 inputBytes[j++] = (byte)firstByte; 338 inputBytes[j++] = (byte)(i & 0xff); 339 } 340 } 341 } else { 342 for (int i = dBegin; i <= dEnd; i++) { 343 inputBytes[j++] = (byte)(i>>8 & 0xff); 344 inputBytes[j++] = (byte)(i & 0xff); 345 } 346 } 347 348 Charset.forName(encoding).newDecoder() 349 .onMalformedInput(CodingErrorAction.REPLACE) 350 .onUnmappableCharacter(CodingErrorAction.REPLACE) 351 .replaceWith("\u0000") 352 .decode(ByteBuffer.wrap(inputBytes, 0, inputBytes.length), 353 CharBuffer.wrap(outputChars, 0, outputChars.length), 354 true); 355 356 // ensure single byte ascii 357 for (int i = 0x20; i <= 0x7e; i++) { 358 convertedChars[i] = (char)i; 359 } 360 361 //sjis halfwidth katakana 362 if (encodingID == ShiftJISEncoding) { 363 for (int i = 0xa1; i <= 0xdf; i++) { 364 convertedChars[i] = (char)(i - 0xa1 + 0xff61); 365 } 366 } 367 368 /* It would save heap space (approx 60Kbytes for each of these 369 * converters) if stored only valid ranges (ie returned 370 * outputChars directly. But this is tricky since want to 371 * include the ASCII range too. 372 */ 373 // System.err.println("oc.len="+outputChars.length); 374 // System.err.println("cc.len="+convertedChars.length); 375 // System.err.println("dbegin="+dBegin); 376 System.arraycopy(outputChars, 0, convertedChars, dBegin, 377 outputChars.length); 378 379 //return convertedChars; 380 /* invert this map as now want it to map from Unicode 381 * to other encoding. 382 */ 383 char [] invertedChars = new char[65536]; 384 for (int i=0;i<65536;i++) { 385 if (convertedChars[i] != noSuchChar) { 386 invertedChars[convertedChars[i]] = (char)i; 387 } 388 } 389 return invertedChars; 390 391 } catch (Exception e) { 392 e.printStackTrace(); 393 } 394 return null; 395 } 396 397 /* 398 * The returned array maps to unicode from some other 2 byte encoding 399 * eg for a 2byte index which represents a SJIS char, the indexed 400 * value is the corresponding unicode char. 401 */ getConverterMap(short encodingID)402 static char[] getConverterMap(short encodingID) { 403 if (converterMaps[encodingID] == null) { 404 converterMaps[encodingID] = getConverter(encodingID); 405 } 406 return converterMaps[encodingID]; 407 } 408 409 createCMap(ByteBuffer buffer, int offset, char[] xlat)410 static CMap createCMap(ByteBuffer buffer, int offset, char[] xlat) { 411 /* First do a sanity check that this cmap subtable is contained 412 * within the cmap table. 413 */ 414 int subtableFormat = buffer.getChar(offset); 415 long subtableLength; 416 if (subtableFormat < 8) { 417 subtableLength = buffer.getChar(offset+2); 418 } else { 419 subtableLength = buffer.getInt(offset+4) & INTMASK; 420 } 421 if (offset+subtableLength > buffer.capacity()) { 422 if (FontUtilities.isLogging()) { 423 FontUtilities.getLogger().warning("Cmap subtable overflows buffer."); 424 } 425 } 426 switch (subtableFormat) { 427 case 0: return new CMapFormat0(buffer, offset); 428 case 2: return new CMapFormat2(buffer, offset, xlat); 429 case 4: return new CMapFormat4(buffer, offset, xlat); 430 case 6: return new CMapFormat6(buffer, offset, xlat); 431 case 8: return new CMapFormat8(buffer, offset, xlat); 432 case 10: return new CMapFormat10(buffer, offset, xlat); 433 case 12: return new CMapFormat12(buffer, offset, xlat); 434 default: throw new RuntimeException("Cmap format unimplemented: " + 435 (int)buffer.getChar(offset)); 436 } 437 } 438 createUVS(ByteBuffer buffer, int offset)439 private void createUVS(ByteBuffer buffer, int offset) { 440 int subtableFormat = buffer.getChar(offset); 441 if (subtableFormat == 14) { 442 long subtableLength = buffer.getInt(offset + 2) & INTMASK; 443 if (offset + subtableLength > buffer.capacity()) { 444 if (FontUtilities.isLogging()) { 445 FontUtilities.getLogger() 446 .warning("Cmap UVS subtable overflows buffer."); 447 } 448 } 449 try { 450 this.uvs = new UVS(buffer, offset); 451 } catch (Throwable t) { 452 t.printStackTrace(); 453 } 454 } 455 return; 456 } 457 458 /* 459 final char charVal(byte[] cmap, int index) { 460 return (char)(((0xff & cmap[index]) << 8)+(0xff & cmap[index+1])); 461 } 462 463 final short shortVal(byte[] cmap, int index) { 464 return (short)(((0xff & cmap[index]) << 8)+(0xff & cmap[index+1])); 465 } 466 */ getGlyph(int charCode)467 abstract char getGlyph(int charCode); 468 469 /* Format 4 Header is 470 * ushort format (off=0) 471 * ushort length (off=2) 472 * ushort language (off=4) 473 * ushort segCountX2 (off=6) 474 * ushort searchRange (off=8) 475 * ushort entrySelector (off=10) 476 * ushort rangeShift (off=12) 477 * ushort endCount[segCount] (off=14) 478 * ushort reservedPad 479 * ushort startCount[segCount] 480 * short idDelta[segCount] 481 * idRangeOFfset[segCount] 482 * ushort glyphIdArray[] 483 */ 484 static class CMapFormat4 extends CMap { 485 int segCount; 486 int entrySelector; 487 int rangeShift; 488 char[] endCount; 489 char[] startCount; 490 short[] idDelta; 491 char[] idRangeOffset; 492 char[] glyphIds; 493 CMapFormat4(ByteBuffer bbuffer, int offset, char[] xlat)494 CMapFormat4(ByteBuffer bbuffer, int offset, char[] xlat) { 495 496 this.xlat = xlat; 497 498 bbuffer.position(offset); 499 CharBuffer buffer = bbuffer.asCharBuffer(); 500 buffer.get(); // skip, we already know format=4 501 int subtableLength = buffer.get(); 502 /* Try to recover from some bad fonts which specify a subtable 503 * length that would overflow the byte buffer holding the whole 504 * cmap table. If this isn't a recoverable situation an exception 505 * may be thrown which is caught higher up the call stack. 506 * Whilst this may seem lenient, in practice, unless the "bad" 507 * subtable we are using is the last one in the cmap table we 508 * would have no way of knowing about this problem anyway. 509 */ 510 if (offset+subtableLength > bbuffer.capacity()) { 511 subtableLength = bbuffer.capacity() - offset; 512 } 513 buffer.get(); // skip language 514 segCount = buffer.get()/2; 515 int searchRange = buffer.get(); 516 entrySelector = buffer.get(); 517 rangeShift = buffer.get()/2; 518 startCount = new char[segCount]; 519 endCount = new char[segCount]; 520 idDelta = new short[segCount]; 521 idRangeOffset = new char[segCount]; 522 523 for (int i=0; i<segCount; i++) { 524 endCount[i] = buffer.get(); 525 } 526 buffer.get(); // 2 bytes for reserved pad 527 for (int i=0; i<segCount; i++) { 528 startCount[i] = buffer.get(); 529 } 530 531 for (int i=0; i<segCount; i++) { 532 idDelta[i] = (short)buffer.get(); 533 } 534 535 for (int i=0; i<segCount; i++) { 536 char ctmp = buffer.get(); 537 idRangeOffset[i] = (char)((ctmp>>1)&0xffff); 538 } 539 /* Can calculate the number of glyph IDs by subtracting 540 * "pos" from the length of the cmap 541 */ 542 int pos = (segCount*8+16)/2; 543 buffer.position(pos); 544 int numGlyphIds = (subtableLength/2 - pos); 545 glyphIds = new char[numGlyphIds]; 546 for (int i=0;i<numGlyphIds;i++) { 547 glyphIds[i] = buffer.get(); 548 } 549 /* 550 System.err.println("segcount="+segCount); 551 System.err.println("entrySelector="+entrySelector); 552 System.err.println("rangeShift="+rangeShift); 553 for (int j=0;j<segCount;j++) { 554 System.err.println("j="+j+ " sc="+(int)(startCount[j]&0xffff)+ 555 " ec="+(int)(endCount[j]&0xffff)+ 556 " delta="+idDelta[j] + 557 " ro="+(int)idRangeOffset[j]); 558 } 559 560 //System.err.println("numglyphs="+glyphIds.length); 561 for (int i=0;i<numGlyphIds;i++) { 562 System.err.println("gid["+i+"]="+(int)glyphIds[i]); 563 } 564 */ 565 } 566 getGlyph(int charCode)567 char getGlyph(int charCode) { 568 569 final int origCharCode = charCode; 570 int index = 0; 571 char glyphCode = 0; 572 573 int controlGlyph = getControlCodeGlyph(charCode, true); 574 if (controlGlyph >= 0) { 575 return (char)controlGlyph; 576 } 577 578 /* presence of translation array indicates that this 579 * cmap is in some other (non-unicode encoding). 580 * In order to look-up a char->glyph mapping we need to 581 * translate the unicode code point to the encoding of 582 * the cmap. 583 * REMIND: VALID CHARCODES?? 584 */ 585 if (xlat != null) { 586 charCode = xlat[charCode]; 587 } 588 589 /* 590 * Citation from the TrueType (and OpenType) spec: 591 * The segments are sorted in order of increasing endCode 592 * values, and the segment values are specified in four parallel 593 * arrays. You search for the first endCode that is greater than 594 * or equal to the character code you want to map. If the 595 * corresponding startCode is less than or equal to the 596 * character code, then you use the corresponding idDelta and 597 * idRangeOffset to map the character code to a glyph index 598 * (otherwise, the missingGlyph is returned). 599 */ 600 601 /* 602 * CMAP format4 defines several fields for optimized search of 603 * the segment list (entrySelector, searchRange, rangeShift). 604 * However, benefits are neglible and some fonts have incorrect 605 * data - so we use straightforward binary search (see bug 6247425) 606 */ 607 int left = 0, right = startCount.length; 608 index = startCount.length >> 1; 609 while (left < right) { 610 if (endCount[index] < charCode) { 611 left = index + 1; 612 } else { 613 right = index; 614 } 615 index = (left + right) >> 1; 616 } 617 618 if (charCode >= startCount[index] && charCode <= endCount[index]) { 619 int rangeOffset = idRangeOffset[index]; 620 621 if (rangeOffset == 0) { 622 glyphCode = (char)(charCode + idDelta[index]); 623 } else { 624 /* Calculate an index into the glyphIds array */ 625 626 /* 627 System.err.println("rangeoffset="+rangeOffset+ 628 " charCode=" + charCode + 629 " scnt["+index+"]="+(int)startCount[index] + 630 " segCnt="+segCount); 631 */ 632 633 int glyphIDIndex = rangeOffset - segCount + index 634 + (charCode - startCount[index]); 635 glyphCode = glyphIds[glyphIDIndex]; 636 if (glyphCode != 0) { 637 glyphCode = (char)(glyphCode + idDelta[index]); 638 } 639 } 640 } 641 if (glyphCode == 0) { 642 glyphCode = getFormatCharGlyph(origCharCode); 643 } 644 return glyphCode; 645 } 646 } 647 648 // Format 0: Byte Encoding table 649 static class CMapFormat0 extends CMap { 650 byte [] cmap; 651 CMapFormat0(ByteBuffer buffer, int offset)652 CMapFormat0(ByteBuffer buffer, int offset) { 653 654 /* skip 6 bytes of format, length, and version */ 655 int len = buffer.getChar(offset+2); 656 cmap = new byte[len-6]; 657 buffer.position(offset+6); 658 buffer.get(cmap); 659 } 660 getGlyph(int charCode)661 char getGlyph(int charCode) { 662 if (charCode < 256) { 663 if (charCode < 0x0010) { 664 switch (charCode) { 665 case 0x0009: 666 case 0x000a: 667 case 0x000d: return CharToGlyphMapper.INVISIBLE_GLYPH_ID; 668 } 669 } 670 return (char)(0xff & cmap[charCode]); 671 } else { 672 return 0; 673 } 674 } 675 } 676 677 // static CMap createSymbolCMap(ByteBuffer buffer, int offset, char[] syms) { 678 679 // CMap cmap = createCMap(buffer, offset, null); 680 // if (cmap == null) { 681 // return null; 682 // } else { 683 // return new CMapFormatSymbol(cmap, syms); 684 // } 685 // } 686 687 // static class CMapFormatSymbol extends CMap { 688 689 // CMap cmap; 690 // static final int NUM_BUCKETS = 128; 691 // Bucket[] buckets = new Bucket[NUM_BUCKETS]; 692 693 // class Bucket { 694 // char unicode; 695 // char glyph; 696 // Bucket next; 697 698 // Bucket(char u, char g) { 699 // unicode = u; 700 // glyph = g; 701 // } 702 // } 703 704 // CMapFormatSymbol(CMap cmap, char[] syms) { 705 706 // this.cmap = cmap; 707 708 // for (int i=0;i<syms.length;i++) { 709 // char unicode = syms[i]; 710 // if (unicode != noSuchChar) { 711 // char glyph = cmap.getGlyph(i + 0xf000); 712 // int hash = unicode % NUM_BUCKETS; 713 // Bucket bucket = new Bucket(unicode, glyph); 714 // if (buckets[hash] == null) { 715 // buckets[hash] = bucket; 716 // } else { 717 // Bucket b = buckets[hash]; 718 // while (b.next != null) { 719 // b = b.next; 720 // } 721 // b.next = bucket; 722 // } 723 // } 724 // } 725 // } 726 727 // char getGlyph(int unicode) { 728 // if (unicode >= 0x1000) { 729 // return 0; 730 // } 731 // else if (unicode >=0xf000 && unicode < 0xf100) { 732 // return cmap.getGlyph(unicode); 733 // } else { 734 // Bucket b = buckets[unicode % NUM_BUCKETS]; 735 // while (b != null) { 736 // if (b.unicode == unicode) { 737 // return b.glyph; 738 // } else { 739 // b = b.next; 740 // } 741 // } 742 // return 0; 743 // } 744 // } 745 // } 746 747 // Format 2: High-byte mapping through table 748 static class CMapFormat2 extends CMap { 749 750 char[] subHeaderKey = new char[256]; 751 /* Store subheaders in individual arrays 752 * A SubHeader entry theortically looks like { 753 * char firstCode; 754 * char entryCount; 755 * short idDelta; 756 * char idRangeOffset; 757 * } 758 */ 759 char[] firstCodeArray; 760 char[] entryCountArray; 761 short[] idDeltaArray; 762 char[] idRangeOffSetArray; 763 764 char[] glyphIndexArray; 765 CMapFormat2(ByteBuffer buffer, int offset, char[] xlat)766 CMapFormat2(ByteBuffer buffer, int offset, char[] xlat) { 767 768 this.xlat = xlat; 769 770 int tableLen = buffer.getChar(offset+2); 771 buffer.position(offset+6); 772 CharBuffer cBuffer = buffer.asCharBuffer(); 773 char maxSubHeader = 0; 774 for (int i=0;i<256;i++) { 775 subHeaderKey[i] = cBuffer.get(); 776 if (subHeaderKey[i] > maxSubHeader) { 777 maxSubHeader = subHeaderKey[i]; 778 } 779 } 780 /* The value of the subHeaderKey is 8 * the subHeader index, 781 * so the number of subHeaders can be obtained by dividing 782 * this value bv 8 and adding 1. 783 */ 784 int numSubHeaders = (maxSubHeader >> 3) +1; 785 firstCodeArray = new char[numSubHeaders]; 786 entryCountArray = new char[numSubHeaders]; 787 idDeltaArray = new short[numSubHeaders]; 788 idRangeOffSetArray = new char[numSubHeaders]; 789 for (int i=0; i<numSubHeaders; i++) { 790 firstCodeArray[i] = cBuffer.get(); 791 entryCountArray[i] = cBuffer.get(); 792 idDeltaArray[i] = (short)cBuffer.get(); 793 idRangeOffSetArray[i] = cBuffer.get(); 794 // System.out.println("sh["+i+"]:fc="+(int)firstCodeArray[i]+ 795 // " ec="+(int)entryCountArray[i]+ 796 // " delta="+(int)idDeltaArray[i]+ 797 // " offset="+(int)idRangeOffSetArray[i]); 798 } 799 800 int glyphIndexArrSize = (tableLen-518-numSubHeaders*8)/2; 801 glyphIndexArray = new char[glyphIndexArrSize]; 802 for (int i=0; i<glyphIndexArrSize;i++) { 803 glyphIndexArray[i] = cBuffer.get(); 804 } 805 } 806 getGlyph(int charCode)807 char getGlyph(int charCode) { 808 final int origCharCode = charCode; 809 int controlGlyph = getControlCodeGlyph(charCode, true); 810 if (controlGlyph >= 0) { 811 return (char)controlGlyph; 812 } 813 814 if (xlat != null) { 815 charCode = xlat[charCode]; 816 } 817 818 char highByte = (char)(charCode >> 8); 819 char lowByte = (char)(charCode & 0xff); 820 int key = subHeaderKey[highByte]>>3; // index into subHeaders 821 char mapMe; 822 823 if (key != 0) { 824 mapMe = lowByte; 825 } else { 826 mapMe = highByte; 827 if (mapMe == 0) { 828 mapMe = lowByte; 829 } 830 } 831 832 // System.err.println("charCode="+Integer.toHexString(charCode)+ 833 // " key="+key+ " mapMe="+Integer.toHexString(mapMe)); 834 char firstCode = firstCodeArray[key]; 835 if (mapMe < firstCode) { 836 return 0; 837 } else { 838 mapMe -= firstCode; 839 } 840 841 if (mapMe < entryCountArray[key]) { 842 /* "address" arithmetic is needed to calculate the offset 843 * into glyphIndexArray. "idRangeOffSetArray[key]" specifies 844 * the number of bytes from that location in the table where 845 * the subarray of glyphIndexes starting at "firstCode" begins. 846 * Each entry in the subHeader table is 8 bytes, and the 847 * idRangeOffSetArray field is at offset 6 in the entry. 848 * The glyphIndexArray immediately follows the subHeaders. 849 * So if there are "N" entries then the number of bytes to the 850 * start of glyphIndexArray is (N-key)*8-6. 851 * Subtract this from the idRangeOffSetArray value to get 852 * the number of bytes into glyphIndexArray and divide by 2 to 853 * get the (char) array index. 854 */ 855 int glyphArrayOffset = ((idRangeOffSetArray.length-key)*8)-6; 856 int glyphSubArrayStart = 857 (idRangeOffSetArray[key] - glyphArrayOffset)/2; 858 char glyphCode = glyphIndexArray[glyphSubArrayStart+mapMe]; 859 if (glyphCode != 0) { 860 glyphCode += idDeltaArray[key]; //idDelta 861 return glyphCode; 862 } 863 } 864 return getFormatCharGlyph(origCharCode); 865 } 866 } 867 868 // Format 6: Trimmed table mapping 869 static class CMapFormat6 extends CMap { 870 871 char firstCode; 872 char entryCount; 873 char[] glyphIdArray; 874 CMapFormat6(ByteBuffer bbuffer, int offset, char[] xlat)875 CMapFormat6(ByteBuffer bbuffer, int offset, char[] xlat) { 876 877 bbuffer.position(offset+6); 878 CharBuffer buffer = bbuffer.asCharBuffer(); 879 firstCode = buffer.get(); 880 entryCount = buffer.get(); 881 glyphIdArray = new char[entryCount]; 882 for (int i=0; i< entryCount; i++) { 883 glyphIdArray[i] = buffer.get(); 884 } 885 } 886 getGlyph(int charCode)887 char getGlyph(int charCode) { 888 final int origCharCode = charCode; 889 int controlGlyph = getControlCodeGlyph(charCode, true); 890 if (controlGlyph >= 0) { 891 return (char)controlGlyph; 892 } 893 894 if (xlat != null) { 895 charCode = xlat[charCode]; 896 } 897 898 charCode -= firstCode; 899 if (charCode < 0 || charCode >= entryCount) { 900 return getFormatCharGlyph(origCharCode); 901 } else { 902 return glyphIdArray[charCode]; 903 } 904 } 905 } 906 907 // Format 8: mixed 16-bit and 32-bit coverage 908 // Seems unlikely this code will ever get tested as we look for 909 // MS platform Cmaps and MS states (in the Opentype spec on their website) 910 // that MS doesn't support this format 911 static class CMapFormat8 extends CMap { 912 byte[] is32 = new byte[8192]; 913 int nGroups; 914 int[] startCharCode; 915 int[] endCharCode; 916 int[] startGlyphID; 917 CMapFormat8(ByteBuffer bbuffer, int offset, char[] xlat)918 CMapFormat8(ByteBuffer bbuffer, int offset, char[] xlat) { 919 920 bbuffer.position(12); 921 bbuffer.get(is32); 922 nGroups = bbuffer.getInt() & INTMASK; 923 // A map group record is three uint32's making for 12 bytes total 924 if (bbuffer.remaining() < (12 * (long)nGroups)) { 925 throw new RuntimeException("Format 8 table exceeded"); 926 } 927 startCharCode = new int[nGroups]; 928 endCharCode = new int[nGroups]; 929 startGlyphID = new int[nGroups]; 930 } 931 getGlyph(int charCode)932 char getGlyph(int charCode) { 933 if (xlat != null) { 934 throw new RuntimeException("xlat array for cmap fmt=8"); 935 } 936 return 0; 937 } 938 939 } 940 941 942 // Format 4-byte 10: Trimmed table mapping 943 // Seems unlikely this code will ever get tested as we look for 944 // MS platform Cmaps and MS states (in the Opentype spec on their website) 945 // that MS doesn't support this format 946 static class CMapFormat10 extends CMap { 947 948 long firstCode; 949 int entryCount; 950 char[] glyphIdArray; 951 CMapFormat10(ByteBuffer bbuffer, int offset, char[] xlat)952 CMapFormat10(ByteBuffer bbuffer, int offset, char[] xlat) { 953 954 bbuffer.position(offset+12); 955 firstCode = bbuffer.getInt() & INTMASK; 956 entryCount = bbuffer.getInt() & INTMASK; 957 // each glyph is a uint16, so 2 bytes per value. 958 if (bbuffer.remaining() < (2 * (long)entryCount)) { 959 throw new RuntimeException("Format 10 table exceeded"); 960 } 961 CharBuffer buffer = bbuffer.asCharBuffer(); 962 glyphIdArray = new char[entryCount]; 963 for (int i=0; i< entryCount; i++) { 964 glyphIdArray[i] = buffer.get(); 965 } 966 } 967 getGlyph(int charCode)968 char getGlyph(int charCode) { 969 970 if (xlat != null) { 971 throw new RuntimeException("xlat array for cmap fmt=10"); 972 } 973 974 int code = (int)(charCode - firstCode); 975 if (code < 0 || code >= entryCount) { 976 return 0; 977 } else { 978 return glyphIdArray[code]; 979 } 980 } 981 } 982 983 // Format 12: Segmented coverage for UCS-4 (fonts supporting 984 // surrogate pairs) 985 static class CMapFormat12 extends CMap { 986 987 int numGroups; 988 int highBit =0; 989 int power; 990 int extra; 991 long[] startCharCode; 992 long[] endCharCode; 993 int[] startGlyphID; 994 CMapFormat12(ByteBuffer buffer, int offset, char[] xlat)995 CMapFormat12(ByteBuffer buffer, int offset, char[] xlat) { 996 if (xlat != null) { 997 throw new RuntimeException("xlat array for cmap fmt=12"); 998 } 999 1000 buffer.position(offset+12); 1001 numGroups = buffer.getInt() & INTMASK; 1002 // A map group record is three uint32's making for 12 bytes total 1003 if (buffer.remaining() < (12 * (long)numGroups)) { 1004 throw new RuntimeException("Format 12 table exceeded"); 1005 } 1006 startCharCode = new long[numGroups]; 1007 endCharCode = new long[numGroups]; 1008 startGlyphID = new int[numGroups]; 1009 buffer = buffer.slice(); 1010 IntBuffer ibuffer = buffer.asIntBuffer(); 1011 for (int i=0; i<numGroups; i++) { 1012 startCharCode[i] = ibuffer.get() & INTMASK; 1013 endCharCode[i] = ibuffer.get() & INTMASK; 1014 startGlyphID[i] = ibuffer.get() & INTMASK; 1015 } 1016 1017 /* Finds the high bit by binary searching through the bits */ 1018 int value = numGroups; 1019 1020 if (value >= 1 << 16) { 1021 value >>= 16; 1022 highBit += 16; 1023 } 1024 1025 if (value >= 1 << 8) { 1026 value >>= 8; 1027 highBit += 8; 1028 } 1029 1030 if (value >= 1 << 4) { 1031 value >>= 4; 1032 highBit += 4; 1033 } 1034 1035 if (value >= 1 << 2) { 1036 value >>= 2; 1037 highBit += 2; 1038 } 1039 1040 if (value >= 1 << 1) { 1041 value >>= 1; 1042 highBit += 1; 1043 } 1044 1045 power = 1 << highBit; 1046 extra = numGroups - power; 1047 } 1048 getGlyph(int charCode)1049 char getGlyph(int charCode) { 1050 final int origCharCode = charCode; 1051 int controlGlyph = getControlCodeGlyph(charCode, false); 1052 if (controlGlyph >= 0) { 1053 return (char)controlGlyph; 1054 } 1055 int probe = power; 1056 int range = 0; 1057 1058 if (startCharCode[extra] <= charCode) { 1059 range = extra; 1060 } 1061 1062 while (probe > 1) { 1063 probe >>= 1; 1064 1065 if (startCharCode[range+probe] <= charCode) { 1066 range += probe; 1067 } 1068 } 1069 1070 if (startCharCode[range] <= charCode && 1071 endCharCode[range] >= charCode) { 1072 return (char) 1073 (startGlyphID[range] + (charCode - startCharCode[range])); 1074 } 1075 1076 return getFormatCharGlyph(origCharCode); 1077 } 1078 1079 } 1080 1081 /* Used to substitute for bad Cmaps. */ 1082 static class NullCMapClass extends CMap { 1083 getGlyph(int charCode)1084 char getGlyph(int charCode) { 1085 return 0; 1086 } 1087 } 1088 1089 public static final NullCMapClass theNullCmap = new NullCMapClass(); 1090 getControlCodeGlyph(int charCode, boolean noSurrogates)1091 final int getControlCodeGlyph(int charCode, boolean noSurrogates) { 1092 if (charCode < 0x0010) { 1093 switch (charCode) { 1094 case 0x0009: 1095 case 0x000a: 1096 case 0x000d: return CharToGlyphMapper.INVISIBLE_GLYPH_ID; 1097 } 1098 } else if (noSurrogates && charCode >= 0xFFFF) { 1099 return 0; 1100 } 1101 return -1; 1102 } 1103 getFormatCharGlyph(int charCode)1104 final char getFormatCharGlyph(int charCode) { 1105 if (charCode >= 0x200c) { 1106 if ((charCode <= 0x200f) || 1107 (charCode >= 0x2028 && charCode <= 0x202e) || 1108 (charCode >= 0x206a && charCode <= 0x206f)) { 1109 return (char)CharToGlyphMapper.INVISIBLE_GLYPH_ID; 1110 } 1111 } 1112 return 0; 1113 } 1114 1115 static class UVS { 1116 int numSelectors; 1117 int[] selector; 1118 1119 //for Non-Default UVS Table 1120 int[] numUVSMapping; 1121 int[][] unicodeValue; 1122 char[][] glyphID; 1123 UVS(ByteBuffer buffer, int offset)1124 UVS(ByteBuffer buffer, int offset) { 1125 buffer.position(offset+6); 1126 numSelectors = buffer.getInt() & INTMASK; 1127 // A variation selector record is one 3 byte int + two int32's 1128 // making for 11 bytes per record. 1129 if (buffer.remaining() < (11 * (long)numSelectors)) { 1130 throw new RuntimeException("Variations exceed buffer"); 1131 } 1132 selector = new int[numSelectors]; 1133 numUVSMapping = new int[numSelectors]; 1134 unicodeValue = new int[numSelectors][]; 1135 glyphID = new char[numSelectors][]; 1136 1137 for (int i = 0; i < numSelectors; i++) { 1138 buffer.position(offset + 10 + i * 11); 1139 selector[i] = (buffer.get() & 0xff) << 16; //UINT24 1140 selector[i] += (buffer.get() & 0xff) << 8; 1141 selector[i] += buffer.get() & 0xff; 1142 1143 //skip Default UVS Table 1144 1145 //for Non-Default UVS Table 1146 int tableOffset = buffer.getInt(offset + 10 + i * 11 + 7); 1147 if (tableOffset == 0) { 1148 numUVSMapping[i] = 0; 1149 } else if (tableOffset > 0) { 1150 buffer.position(offset+tableOffset); 1151 numUVSMapping[i] = buffer.getInt() & INTMASK; 1152 // a UVS mapping record is one 3 byte int + uint16 1153 // making for 5 bytes per record. 1154 if (buffer.remaining() < (5 * (long)numUVSMapping[i])) { 1155 throw new RuntimeException("Variations exceed buffer"); 1156 } 1157 unicodeValue[i] = new int[numUVSMapping[i]]; 1158 glyphID[i] = new char[numUVSMapping[i]]; 1159 1160 for (int j = 0; j < numUVSMapping[i]; j++) { 1161 int temp = (buffer.get() & 0xff) << 16; //UINT24 1162 temp += (buffer.get() & 0xff) << 8; 1163 temp += buffer.get() & 0xff; 1164 unicodeValue[i][j] = temp; 1165 glyphID[i][j] = buffer.getChar(); 1166 } 1167 } 1168 } 1169 } 1170 1171 static final int VS_NOGLYPH = 0; getGlyph(int charCode, int variationSelector)1172 private int getGlyph(int charCode, int variationSelector) { 1173 int targetSelector = -1; 1174 for (int i = 0; i < numSelectors; i++) { 1175 if (selector[i] == variationSelector) { 1176 targetSelector = i; 1177 break; 1178 } 1179 } 1180 if (targetSelector == -1) { 1181 return VS_NOGLYPH; 1182 } 1183 if (numUVSMapping[targetSelector] > 0) { 1184 int index = java.util.Arrays.binarySearch( 1185 unicodeValue[targetSelector], charCode); 1186 if (index >= 0) { 1187 return glyphID[targetSelector][index]; 1188 } 1189 } 1190 return VS_NOGLYPH; 1191 } 1192 } 1193 getVariationGlyph(int charCode, int variationSelector)1194 char getVariationGlyph(int charCode, int variationSelector) { 1195 char glyph = 0; 1196 if (uvs == null) { 1197 glyph = getGlyph(charCode); 1198 } else { 1199 int result = uvs.getGlyph(charCode, variationSelector); 1200 if (result > 0) { 1201 glyph = (char)(result & 0xFFFF); 1202 } else { 1203 glyph = getGlyph(charCode); 1204 } 1205 } 1206 return glyph; 1207 } 1208 } 1209