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| 1 | +/* | |
| 2 | + * Copyright (c) 2003, 2010, 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.awt.Font; | |
| 29 | +import java.awt.font.FontRenderContext; | |
| 30 | +import java.awt.geom.AffineTransform; | |
| 31 | +import java.lang.ref.Reference; | |
| 32 | +import java.lang.ref.SoftReference; | |
| 33 | +import java.util.concurrent.ConcurrentHashMap; | |
| 34 | +import java.util.Locale; | |
| 35 | + | |
| 36 | +public abstract class Font2D { | |
| 37 | + | |
| 38 | + /* Note: JRE and FONT_CONFIG ranks are identical. I don't know of a reason | |
| 39 | + * to distingish these. Possibly if a user adds fonts to the JRE font | |
| 40 | + * directory that are the same font as the ones specified in the font | |
| 41 | + * configuration but that is more likely to be the legitimate intention | |
| 42 | + * than a problem. One reason why these should be the same is that on | |
| 43 | + * Linux the JRE fonts ARE the font configuration fonts, and although I | |
| 44 | + * believe all are assigned FONT_CONFIG rank, it is conceivable that if | |
| 45 | + * this were not so, that some JRE font would not be allowed to joint the | |
| 46 | + * family of its siblings which were assigned FONT_CONFIG rank. Giving | |
| 47 | + * them the same rank is the easy solution for now at least. | |
| 48 | + */ | |
| 49 | + public static final int FONT_CONFIG_RANK = 2; | |
| 50 | + public static final int JRE_RANK = 2; | |
| 51 | + public static final int TTF_RANK = 3; | |
| 52 | + public static final int TYPE1_RANK = 4; | |
| 53 | + public static final int NATIVE_RANK = 5; | |
| 54 | + public static final int UNKNOWN_RANK = 6; | |
| 55 | + public static final int DEFAULT_RANK = 4; | |
| 56 | + | |
| 57 | + private static final String[] boldNames = { | |
| 58 | + "bold", "demibold", "demi-bold", "demi bold", "negreta", "demi", }; | |
| 59 | + | |
| 60 | + private static final String[] italicNames = { | |
| 61 | + "italic", "cursiva", "oblique", "inclined", }; | |
| 62 | + | |
| 63 | + private static final String[] boldItalicNames = { | |
| 64 | + "bolditalic", "bold-italic", "bold italic", | |
| 65 | + "boldoblique", "bold-oblique", "bold oblique", | |
| 66 | + "demibold italic", "negreta cursiva","demi oblique", }; | |
| 67 | + | |
| 68 | + private static final FontRenderContext DEFAULT_FRC = | |
| 69 | + new FontRenderContext(null, false, false); | |
| 70 | + | |
| 71 | + public Font2DHandle handle; | |
| 72 | + protected String familyName; /* Family font name (english) */ | |
| 73 | + protected String fullName; /* Full font name (english) */ | |
| 74 | + protected int style = Font.PLAIN; | |
| 75 | + protected FontFamily family; | |
| 76 | + protected int fontRank = DEFAULT_RANK; | |
| 77 | + | |
| 78 | + /* | |
| 79 | + * A mapper can be independent of the strike. | |
| 80 | + * Perhaps the reference to the mapper ought to be held on the | |
| 81 | + * scaler, as it may be implemented via scaler functionality anyway | |
| 82 | + * and so the mapper would be useless if its native portion was | |
| 83 | + * freed when the scaler was GC'd. | |
| 84 | + */ | |
| 85 | + protected CharToGlyphMapper mapper; | |
| 86 | + | |
| 87 | + /* | |
| 88 | + * The strike cache is maintained per "Font2D" as that is the | |
| 89 | + * principal object by which you look up fonts. | |
| 90 | + * It means more Hashmaps, but look ups can be quicker because | |
| 91 | + * the map will have fewer entries, and there's no need to try to | |
| 92 | + * make the Font2D part of the key. | |
| 93 | + */ | |
| 94 | + protected ConcurrentHashMap<FontStrikeDesc, Reference> | |
| 95 | + strikeCache = new ConcurrentHashMap<FontStrikeDesc, Reference>(); | |
| 96 | + | |
| 97 | + /* Store the last Strike in a Reference object. | |
| 98 | + * Similarly to the strike that was stored on a C++ font object, | |
| 99 | + * this is an optimisation which helps if multiple clients (ie | |
| 100 | + * typically SunGraphics2D instances) are using the same font, then | |
| 101 | + * as may be typical of many UIs, they are probably using it in the | |
| 102 | + * same style, so it can be a win to first quickly check if the last | |
| 103 | + * strike obtained from this Font2D satifies the needs of the next | |
| 104 | + * client too. | |
| 105 | + * This pre-supposes that a FontStrike is a shareable object, which | |
| 106 | + * it should. | |
| 107 | + */ | |
| 108 | + protected Reference lastFontStrike = new SoftReference(null); | |
| 109 | + | |
| 110 | + /* | |
| 111 | + * POSSIBLE OPTIMISATION: | |
| 112 | + * Array of length 1024 elements of 64 bits indicating if a font | |
| 113 | + * contains these. This kind of information can be shared between | |
| 114 | + * all point sizes. | |
| 115 | + * if corresponding bit in knownBitmaskMap is set then canDisplayBitmaskMap | |
| 116 | + * is valid. This is 16Kbytes of data per composite font style. | |
| 117 | + * What about UTF-32 and surrogates? | |
| 118 | + * REMIND: This is too much storage. Probably can only cache this | |
| 119 | + * information for latin range, although possibly OK to store all | |
| 120 | + * for just the "logical" fonts. | |
| 121 | + * Or instead store arrays of subranges of 1024 bits (128 bytes) in | |
| 122 | + * the range below surrogate pairs. | |
| 123 | + */ | |
| 124 | +// protected long[] knownBitmaskMap; | |
| 125 | +// protected long[] canDisplayBitmaskMap; | |
| 126 | + | |
| 127 | + /* Returns the "real" style of this Font2D. Eg the font face | |
| 128 | + * Lucida Sans Bold" has a real style of Font.BOLD, even though | |
| 129 | + * it may be able to used to simulate bold italic | |
| 130 | + */ | |
| 131 | + public int getStyle() { | |
| 132 | + return style; | |
| 133 | + } | |
| 134 | + protected void setStyle() { | |
| 135 | + | |
| 136 | + String fName = fullName.toLowerCase(); | |
| 137 | + | |
| 138 | + for (int i=0; i < boldItalicNames.length; i++) { | |
| 139 | + if (fName.indexOf(boldItalicNames[i]) != -1) { | |
| 140 | + style = Font.BOLD|Font.ITALIC; | |
| 141 | + return; | |
| 142 | + } | |
| 143 | + } | |
| 144 | + | |
| 145 | + for (int i=0; i < italicNames.length; i++) { | |
| 146 | + if (fName.indexOf(italicNames[i]) != -1) { | |
| 147 | + style = Font.ITALIC; | |
| 148 | + return; | |
| 149 | + } | |
| 150 | + } | |
| 151 | + | |
| 152 | + for (int i=0; i < boldNames.length; i++) { | |
| 153 | + if (fName.indexOf(boldNames[i]) != -1 ) { | |
| 154 | + style = Font.BOLD; | |
| 155 | + return; | |
| 156 | + } | |
| 157 | + } | |
| 158 | + } | |
| 159 | + | |
| 160 | + | |
| 161 | + int getRank() { | |
| 162 | + return fontRank; | |
| 163 | + } | |
| 164 | + | |
| 165 | + void setRank(int rank) { | |
| 166 | + fontRank = rank; | |
| 167 | + } | |
| 168 | + | |
| 169 | + abstract CharToGlyphMapper getMapper(); | |
| 170 | + | |
| 171 | + | |
| 172 | + | |
| 173 | + /* This isn't very efficient but its infrequently used. | |
| 174 | + * StandardGlyphVector uses it when the client assigns the glyph codes. | |
| 175 | + * These may not be valid. This validates them substituting the missing | |
| 176 | + * glyph elsewhere. | |
| 177 | + */ | |
| 178 | + protected int getValidatedGlyphCode(int glyphCode) { | |
| 179 | + if (glyphCode < 0 || glyphCode >= getMapper().getNumGlyphs()) { | |
| 180 | + glyphCode = getMapper().getMissingGlyphCode(); | |
| 181 | + } | |
| 182 | + return glyphCode; | |
| 183 | + } | |
| 184 | + | |
| 185 | + /* | |
| 186 | + * Creates an appropriate strike for the Font2D subclass | |
| 187 | + */ | |
| 188 | + abstract FontStrike createStrike(FontStrikeDesc desc); | |
| 189 | + | |
| 190 | + /* this may be useful for APIs like canDisplay where the answer | |
| 191 | + * is dependent on the font and its scaler, but not the strike. | |
| 192 | + * If no strike has ever been returned, then create a one that matches | |
| 193 | + * this font with the default FRC. It will become the lastStrike and | |
| 194 | + * there's a good chance that the next call will be to get exactly that | |
| 195 | + * strike. | |
| 196 | + */ | |
| 197 | + public FontStrike getStrike(Font font) { | |
| 198 | + FontStrike strike = (FontStrike)lastFontStrike.get(); | |
| 199 | + if (strike != null) { | |
| 200 | + return strike; | |
| 201 | + } else { | |
| 202 | + return getStrike(font, DEFAULT_FRC); | |
| 203 | + } | |
| 204 | + } | |
| 205 | + | |
| 206 | + /* SunGraphics2D has font, tx, aa and fm. From this info | |
| 207 | + * can get a Strike object from the cache, creating it if necessary. | |
| 208 | + * This code is designed for multi-threaded access. | |
| 209 | + * For that reason it creates a local FontStrikeDesc rather than filling | |
| 210 | + * in a shared one. Up to two AffineTransforms and one FontStrikeDesc will | |
| 211 | + * be created by every lookup. This appears to perform more than | |
| 212 | + * adequately. But it may make sense to expose FontStrikeDesc | |
| 213 | + * as a parameter so a caller can use its own. | |
| 214 | + * In such a case if a FontStrikeDesc is stored as a key then | |
| 215 | + * we would need to use a private copy. | |
| 216 | + * | |
| 217 | + * Note that this code doesn't prevent two threads from creating | |
| 218 | + * two different FontStrike instances and having one of the threads | |
| 219 | + * overwrite the other in the map. This is likely to be a rare | |
| 220 | + * occurrence and the only consequence is that these callers will have | |
| 221 | + * different instances of the strike, and there'd be some duplication of | |
| 222 | + * population of the strikes. However since users of these strikes are | |
| 223 | + * transient, then the one that was overwritten would soon be freed. | |
| 224 | + * If there is any problem then a small synchronized block would be | |
| 225 | + * required with its attendant consequences for MP scaleability. | |
| 226 | + */ | |
| 227 | + public FontStrike getStrike(Font font, AffineTransform devTx, | |
| 228 | + int aa, int fm) { | |
| 229 | + | |
| 230 | + /* Create the descriptor which is used to identify a strike | |
| 231 | + * in the strike cache/map. A strike is fully described by | |
| 232 | + * the attributes of this descriptor. | |
| 233 | + */ | |
| 234 | + /* REMIND: generating garbage and doing computation here in order | |
| 235 | + * to include pt size in the tx just for a lookup! Figure out a | |
| 236 | + * better way. | |
| 237 | + */ | |
| 238 | + double ptSize = font.getSize2D(); | |
| 239 | + AffineTransform glyphTx = (AffineTransform)devTx.clone(); | |
| 240 | + glyphTx.scale(ptSize, ptSize); | |
| 241 | + if (font.isTransformed()) { | |
| 242 | + glyphTx.concatenate(font.getTransform()); | |
| 243 | + } | |
| 244 | + if (glyphTx.getTranslateX() != 0 || glyphTx.getTranslateY() != 0) { | |
| 245 | + glyphTx.setTransform(glyphTx.getScaleX(), | |
| 246 | + glyphTx.getShearY(), | |
| 247 | + glyphTx.getShearX(), | |
| 248 | + glyphTx.getScaleY(), | |
| 249 | + 0.0, 0.0); | |
| 250 | + } | |
| 251 | + FontStrikeDesc desc = new FontStrikeDesc(devTx, glyphTx, | |
| 252 | + font.getStyle(), aa, fm); | |
| 253 | + return getStrike(desc, false); | |
| 254 | + } | |
| 255 | + | |
| 256 | + public FontStrike getStrike(Font font, AffineTransform devTx, | |
| 257 | + AffineTransform glyphTx, | |
| 258 | + int aa, int fm) { | |
| 259 | + | |
| 260 | + /* Create the descriptor which is used to identify a strike | |
| 261 | + * in the strike cache/map. A strike is fully described by | |
| 262 | + * the attributes of this descriptor. | |
| 263 | + */ | |
| 264 | + FontStrikeDesc desc = new FontStrikeDesc(devTx, glyphTx, | |
| 265 | + font.getStyle(), aa, fm); | |
| 266 | + return getStrike(desc, false); | |
| 267 | + } | |
| 268 | + | |
| 269 | + public FontStrike getStrike(Font font, FontRenderContext frc) { | |
| 270 | + | |
| 271 | + AffineTransform at = frc.getTransform(); | |
| 272 | + double ptSize = font.getSize2D(); | |
| 273 | + at.scale(ptSize, ptSize); | |
| 274 | + if (font.isTransformed()) { | |
| 275 | + at.concatenate(font.getTransform()); | |
| 276 | + if (at.getTranslateX() != 0 || at.getTranslateY() != 0) { | |
| 277 | + at.setTransform(at.getScaleX(), | |
| 278 | + at.getShearY(), | |
| 279 | + at.getShearX(), | |
| 280 | + at.getScaleY(), | |
| 281 | + 0.0, 0.0); | |
| 282 | + } | |
| 283 | + } | |
| 284 | + int aa = FontStrikeDesc.getAAHintIntVal(this, font, frc); | |
| 285 | + int fm = FontStrikeDesc.getFMHintIntVal(frc.getFractionalMetricsHint()); | |
| 286 | + FontStrikeDesc desc = new FontStrikeDesc(frc.getTransform(), | |
| 287 | + at, font.getStyle(), | |
| 288 | + aa, fm); | |
| 289 | + return getStrike(desc, false); | |
| 290 | + } | |
| 291 | + | |
| 292 | + FontStrike getStrike(FontStrikeDesc desc) { | |
| 293 | + return getStrike(desc, true); | |
| 294 | + } | |
| 295 | + | |
| 296 | + private FontStrike getStrike(FontStrikeDesc desc, boolean copy) { | |
| 297 | + /* Before looking in the map, see if the descriptor matches the | |
| 298 | + * last strike returned from this Font2D. This should often be a win | |
| 299 | + * since its common for the same font, in the same size to be | |
| 300 | + * used frequently, for example in many parts of a UI. | |
| 301 | + * | |
| 302 | + * If its not the same then we use the descriptor to locate a | |
| 303 | + * Reference to the strike. If it exists and points to a strike, | |
| 304 | + * then we update the last strike to refer to that and return it. | |
| 305 | + * | |
| 306 | + * If the key isn't in the map, or its reference object has been | |
| 307 | + * collected, then we create a new strike, put it in the map and | |
| 308 | + * set it to be the last strike. | |
| 309 | + */ | |
| 310 | + FontStrike strike = (FontStrike)lastFontStrike.get(); | |
| 311 | + if (strike != null && desc.equals(strike.desc)) { | |
| 312 | + //strike.lastlookupTime = System.currentTimeMillis(); | |
| 313 | + return strike; | |
| 314 | + } else { | |
| 315 | + Reference strikeRef = strikeCache.get(desc); | |
| 316 | + if (strikeRef != null) { | |
| 317 | + strike = (FontStrike)strikeRef.get(); | |
| 318 | + if (strike != null) { | |
| 319 | + //strike.lastlookupTime = System.currentTimeMillis(); | |
| 320 | + lastFontStrike = new SoftReference(strike); | |
| 321 | + StrikeCache.refStrike(strike); | |
| 322 | + return strike; | |
| 323 | + } | |
| 324 | + } | |
| 325 | + /* When we create a new FontStrike instance, we *must* | |
| 326 | + * ask the StrikeCache for a reference. We must then ensure | |
| 327 | + * this reference remains reachable, by storing it in the | |
| 328 | + * Font2D's strikeCache map. | |
| 329 | + * So long as the Reference is there (reachable) then if the | |
| 330 | + * reference is cleared, it will be enqueued for disposal. | |
| 331 | + * If for some reason we explicitly remove this reference, it | |
| 332 | + * must only be done when holding a strong reference to the | |
| 333 | + * referent (the FontStrike), or if the reference is cleared, | |
| 334 | + * then we must explicitly "dispose" of the native resources. | |
| 335 | + * The only place this currently happens is in this same method, | |
| 336 | + * where we find a cleared reference and need to overwrite it | |
| 337 | + * here with a new reference. | |
| 338 | + * Clearing the whilst holding a strong reference, should only | |
| 339 | + * be done if the | |
| 340 | + */ | |
| 341 | + if (copy) { | |
| 342 | + desc = new FontStrikeDesc(desc); | |
| 343 | + } | |
| 344 | + strike = createStrike(desc); | |
| 345 | + //StrikeCache.addStrike(); | |
| 346 | + /* If we are creating many strikes on this font which | |
| 347 | + * involve non-quadrant rotations, or more general | |
| 348 | + * transforms which include shears, then force the use | |
| 349 | + * of weak references rather than soft references. | |
| 350 | + * This means that it won't live much beyond the next GC, | |
| 351 | + * which is what we want for what is likely a transient strike. | |
| 352 | + */ | |
| 353 | + int txType = desc.glyphTx.getType(); | |
| 354 | + if (txType == AffineTransform.TYPE_GENERAL_TRANSFORM || | |
| 355 | + (txType & AffineTransform.TYPE_GENERAL_ROTATION) != 0 && | |
| 356 | + strikeCache.size() > 10) { | |
| 357 | + strikeRef = StrikeCache.getStrikeRef(strike, true); | |
| 358 | + } else { | |
| 359 | + strikeRef = StrikeCache.getStrikeRef(strike); | |
| 360 | + } | |
| 361 | + strikeCache.put(desc, strikeRef); | |
| 362 | + //strike.lastlookupTime = System.currentTimeMillis(); | |
| 363 | + lastFontStrike = new SoftReference(strike); | |
| 364 | + StrikeCache.refStrike(strike); | |
| 365 | + return strike; | |
| 366 | + } | |
| 367 | + } | |
| 368 | + | |
| 369 | + void removeFromCache(FontStrikeDesc desc) { | |
| 370 | + Reference ref = strikeCache.get(desc); | |
| 371 | + if (ref != null) { | |
| 372 | + Object o = ref.get(); | |
| 373 | + if (o == null) { | |
| 374 | + strikeCache.remove(desc); | |
| 375 | + } | |
| 376 | + } | |
| 377 | + } | |
| 378 | + | |
| 379 | + /** | |
| 380 | + * The length of the metrics array must be >= 8. This method will | |
| 381 | + * store the following elements in that array before returning: | |
| 382 | + * metrics[0]: ascent | |
| 383 | + * metrics[1]: descent | |
| 384 | + * metrics[2]: leading | |
| 385 | + * metrics[3]: max advance | |
| 386 | + * metrics[4]: strikethrough offset | |
| 387 | + * metrics[5]: strikethrough thickness | |
| 388 | + * metrics[6]: underline offset | |
| 389 | + * metrics[7]: underline thickness | |
| 390 | + */ | |
| 391 | + public void getFontMetrics(Font font, AffineTransform at, | |
| 392 | + Object aaHint, Object fmHint, | |
| 393 | + float metrics[]) { | |
| 394 | + /* This is called in just one place in Font with "at" == identity. | |
| 395 | + * Perhaps this can be eliminated. | |
| 396 | + */ | |
| 397 | + int aa = FontStrikeDesc.getAAHintIntVal(aaHint, this, font.getSize()); | |
| 398 | + int fm = FontStrikeDesc.getFMHintIntVal(fmHint); | |
| 399 | + FontStrike strike = getStrike(font, at, aa, fm); | |
| 400 | + StrikeMetrics strikeMetrics = strike.getFontMetrics(); | |
| 401 | + metrics[0] = strikeMetrics.getAscent(); | |
| 402 | + metrics[1] = strikeMetrics.getDescent(); | |
| 403 | + metrics[2] = strikeMetrics.getLeading(); | |
| 404 | + metrics[3] = strikeMetrics.getMaxAdvance(); | |
| 405 | + | |
| 406 | + getStyleMetrics(font.getSize2D(), metrics, 4); | |
| 407 | + } | |
| 408 | + | |
| 409 | + /** | |
| 410 | + * The length of the metrics array must be >= offset+4, and offset must be | |
| 411 | + * >= 0. Typically offset is 4. This method will | |
| 412 | + * store the following elements in that array before returning: | |
| 413 | + * metrics[off+0]: strikethrough offset | |
| 414 | + * metrics[off+1]: strikethrough thickness | |
| 415 | + * metrics[off+2]: underline offset | |
| 416 | + * metrics[off+3]: underline thickness | |
| 417 | + * | |
| 418 | + * Note that this implementation simply returns default values; | |
| 419 | + * subclasses can override this method to provide more accurate values. | |
| 420 | + */ | |
| 421 | + public void getStyleMetrics(float pointSize, float[] metrics, int offset) { | |
| 422 | + metrics[offset] = -metrics[0] / 2.5f; | |
| 423 | + metrics[offset+1] = pointSize / 12; | |
| 424 | + metrics[offset+2] = metrics[offset+1] / 1.5f; | |
| 425 | + metrics[offset+3] = metrics[offset+1]; | |
| 426 | + } | |
| 427 | + | |
| 428 | + /** | |
| 429 | + * The length of the metrics array must be >= 4. This method will | |
| 430 | + * store the following elements in that array before returning: | |
| 431 | + * metrics[0]: ascent | |
| 432 | + * metrics[1]: descent | |
| 433 | + * metrics[2]: leading | |
| 434 | + * metrics[3]: max advance | |
| 435 | + */ | |
| 436 | + public void getFontMetrics(Font font, FontRenderContext frc, | |
| 437 | + float metrics[]) { | |
| 438 | + StrikeMetrics strikeMetrics = getStrike(font, frc).getFontMetrics(); | |
| 439 | + metrics[0] = strikeMetrics.getAscent(); | |
| 440 | + metrics[1] = strikeMetrics.getDescent(); | |
| 441 | + metrics[2] = strikeMetrics.getLeading(); | |
| 442 | + metrics[3] = strikeMetrics.getMaxAdvance(); | |
| 443 | + } | |
| 444 | + | |
| 445 | + /* Currently the layout code calls this. May be better for layout code | |
| 446 | + * to check the font class before attempting to run, rather than needing | |
| 447 | + * to promote this method up from TrueTypeFont | |
| 448 | + */ | |
| 449 | + byte[] getTableBytes(int tag) { | |
| 450 | + return null; | |
| 451 | + } | |
| 452 | + | |
| 453 | + /* for layout code */ | |
| 454 | + protected long getUnitsPerEm() { | |
| 455 | + return 2048; | |
| 456 | + } | |
| 457 | + | |
| 458 | + boolean supportsEncoding(String encoding) { | |
| 459 | + return false; | |
| 460 | + } | |
| 461 | + | |
| 462 | + public boolean canDoStyle(int style) { | |
| 463 | + return (style == this.style); | |
| 464 | + } | |
| 465 | + | |
| 466 | + /* | |
| 467 | + * All the important subclasses override this which is principally for | |
| 468 | + * the TrueType 'gasp' table. | |
| 469 | + */ | |
| 470 | + public boolean useAAForPtSize(int ptsize) { | |
| 471 | + return true; | |
| 472 | + } | |
| 473 | + | |
| 474 | + public boolean hasSupplementaryChars() { | |
| 475 | + return false; | |
| 476 | + } | |
| 477 | + | |
| 478 | + /* The following methods implement public methods on java.awt.Font */ | |
| 479 | + public String getPostscriptName() { | |
| 480 | + return fullName; | |
| 481 | + } | |
| 482 | + | |
| 483 | + public String getFontName(Locale l) { | |
| 484 | + return fullName; | |
| 485 | + } | |
| 486 | + | |
| 487 | + public String getFamilyName(Locale l) { | |
| 488 | + return familyName; | |
| 489 | + } | |
| 490 | + | |
| 491 | + public int getNumGlyphs() { | |
| 492 | + return getMapper().getNumGlyphs(); | |
| 493 | + } | |
| 494 | + | |
| 495 | + public int charToGlyph(int wchar) { | |
| 496 | + return getMapper().charToGlyph(wchar); | |
| 497 | + } | |
| 498 | + | |
| 499 | + public int getMissingGlyphCode() { | |
| 500 | + return getMapper().getMissingGlyphCode(); | |
| 501 | + } | |
| 502 | + | |
| 503 | + public boolean canDisplay(char c) { | |
| 504 | + return getMapper().canDisplay(c); | |
| 505 | + } | |
| 506 | + | |
| 507 | + public boolean canDisplay(int cp) { | |
| 508 | + return getMapper().canDisplay(cp); | |
| 509 | + } | |
| 510 | + | |
| 511 | + public byte getBaselineFor(char c) { | |
| 512 | + return Font.ROMAN_BASELINE; | |
| 513 | + } | |
| 514 | + | |
| 515 | + public float getItalicAngle(Font font, AffineTransform at, | |
| 516 | + Object aaHint, Object fmHint) { | |
| 517 | + /* hardwire psz=12 as that's typical and AA vs non-AA for 'gasp' mode | |
| 518 | + * isn't important for the caret slope of this rarely used API. | |
| 519 | + */ | |
| 520 | + int aa = FontStrikeDesc.getAAHintIntVal(aaHint, this, 12); | |
| 521 | + int fm = FontStrikeDesc.getFMHintIntVal(fmHint); | |
| 522 | + FontStrike strike = getStrike(font, at, aa, fm); | |
| 523 | + StrikeMetrics metrics = strike.getFontMetrics(); | |
| 524 | + if (metrics.ascentY == 0 || metrics.ascentX == 0) { | |
| 525 | + return 0f; | |
| 526 | + } else { | |
| 527 | + /* ascent is "up" from the baseline so its typically | |
| 528 | + * a negative value, so we need to compensate | |
| 529 | + */ | |
| 530 | + return metrics.ascentX/-metrics.ascentY; | |
| 531 | + } | |
| 532 | + } | |
| 533 | + | |
| 534 | +} | |