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.lang.ref.SoftReference; |
| 29 | import java.awt.Font; |
| 30 | import java.awt.Rectangle; |
| 31 | import java.awt.geom.AffineTransform; |
| 32 | import java.awt.geom.GeneralPath; |
| 33 | import java.awt.geom.NoninvertibleTransformException; |
| 34 | import java.awt.geom.Point2D; |
| 35 | import java.awt.geom.Rectangle2D; |
| 36 | import java.util.concurrent.ConcurrentHashMap; |
| 37 | import static sun.awt.SunHints.*; |
| 38 | |
| 39 | |
| 40 | public class FileFontStrike extends PhysicalStrike { |
| 41 | |
| 42 | /* fffe and ffff are values we specially interpret as meaning |
| 43 | * invisible glyphs. |
| 44 | */ |
| 45 | static final int INVISIBLE_GLYPHS = 0x0fffe; |
| 46 | |
| 47 | private FileFont fileFont; |
| 48 | |
| 49 | /* REMIND: replace this scheme with one that installs a cache |
| 50 | * instance of the appropriate type. It will require changes in |
| 51 | * FontStrikeDisposer and NativeStrike etc. |
| 52 | */ |
| 53 | private static final int UNINITIALISED = 0; |
| 54 | private static final int INTARRAY = 1; |
| 55 | private static final int LONGARRAY = 2; |
| 56 | private static final int SEGINTARRAY = 3; |
| 57 | private static final int SEGLONGARRAY = 4; |
| 58 | |
| 59 | private int glyphCacheFormat = UNINITIALISED; |
| 60 | |
| 61 | /* segmented arrays are blocks of 256 */ |
| 62 | private static final int SEGSHIFT = 8; |
| 63 | private static final int SEGSIZE = 1 << SEGSHIFT; |
| 64 | |
| 65 | private boolean segmentedCache; |
| 66 | private int[][] segIntGlyphImages; |
| 67 | private long[][] segLongGlyphImages; |
| 68 | |
| 69 | /* The "metrics" information requested by clients is usually nothing |
| 70 | * more than the horizontal advance of the character. |
| 71 | * In most cases this advance and other metrics information is stored |
| 72 | * in the glyph image cache. |
| 73 | * But in some cases we do not automatically retrieve the glyph |
| 74 | * image when the advance is requested. In those cases we want to |
| 75 | * cache the advances since this has been shown to be important for |
| 76 | * performance. |
| 77 | * The segmented cache is used in cases when the single array |
| 78 | * would be too large. |
| 79 | */ |
| 80 | private float[] horizontalAdvances; |
| 81 | private float[][] segHorizontalAdvances; |
| 82 | |
| 83 | /* Outline bounds are used when printing and when drawing outlines |
| 84 | * to the screen. On balance the relative rarity of these cases |
| 85 | * and the fact that getting this requires generating a path at |
| 86 | * the scaler level means that its probably OK to store these |
| 87 | * in a Java-level hashmap as the trade-off between time and space. |
| 88 | * Later can revisit whether to cache these at all, or elsewhere. |
| 89 | * Should also profile whether subsequent to getting the bounds, the |
| 90 | * outline itself is also requested. The 1.4 implementation doesn't |
| 91 | * cache outlines so you could generate the path twice - once to get |
| 92 | * the bounds and again to return the outline to the client. |
| 93 | * If the two uses are coincident then also look into caching outlines. |
| 94 | * One simple optimisation is that we could store the last single |
| 95 | * outline retrieved. This assumes that bounds then outline will always |
| 96 | * be retrieved for a glyph rather than retrieving bounds for all glyphs |
| 97 | * then outlines for all glyphs. |
| 98 | */ |
| 99 | ConcurrentHashMap<Integer, Rectangle2D.Float> boundsMap; |
| 100 | SoftReference<ConcurrentHashMap<Integer, Point2D.Float>> |
| 101 | glyphMetricsMapRef; |
| 102 | |
| 103 | AffineTransform invertDevTx; |
| 104 | |
| 105 | boolean useNatives; |
| 106 | NativeStrike[] nativeStrikes; |
| 107 | |
| 108 | FileFontStrike(FileFont fileFont, FontStrikeDesc desc) { |
| 109 | super(fileFont, desc); |
| 110 | this.fileFont = fileFont; |
| 111 | |
| 112 | if (desc.style != fileFont.style) { |
| 113 | /* If using algorithmic styling, the base values are |
| 114 | * boldness = 1.0, italic = 0.0. The superclass constructor |
| 115 | * initialises these. |
| 116 | */ |
| 117 | if ((desc.style & Font.ITALIC) == Font.ITALIC && |
| 118 | (fileFont.style & Font.ITALIC) == 0) { |
| 119 | algoStyle = true; |
| 120 | italic = 0.7f; |
| 121 | } |
| 122 | if ((desc.style & Font.BOLD) == Font.BOLD && |
| 123 | ((fileFont.style & Font.BOLD) == 0)) { |
| 124 | algoStyle = true; |
| 125 | boldness = 1.33f; |
| 126 | } |
| 127 | } |
| 128 | double[] matrix = new double[4]; |
| 129 | AffineTransform at = desc.glyphTx; |
| 130 | at.getMatrix(matrix); |
| 131 | if (!desc.devTx.isIdentity() && |
| 132 | desc.devTx.getType() != AffineTransform.TYPE_TRANSLATION) { |
| 133 | try { |
| 134 | invertDevTx = desc.devTx.createInverse(); |
| 135 | } catch (NoninvertibleTransformException e) { |
| 136 | } |
| 137 | } |
| 138 | |
| 139 | /* If any of the values is NaN then substitute the null scaler context. |
| 140 | * This will return null images, zero advance, and empty outlines |
| 141 | * as no rendering need take place in this case. |
| 142 | * We pass in the null scaler as the singleton null context |
| 143 | * requires it. However |
| 144 | */ |
| 145 | if (Double.isNaN(matrix[0]) || Double.isNaN(matrix[1]) || |
| 146 | Double.isNaN(matrix[2]) || Double.isNaN(matrix[3]) || |
| 147 | fileFont.getScaler() == null) { |
| 148 | pScalerContext = NullFontScaler.getNullScalerContext(); |
| 149 | } else { |
| 150 | pScalerContext = fileFont.getScaler().createScalerContext(matrix, |
| 151 | fileFont instanceof TrueTypeFont, |
| 152 | desc.aaHint, desc.fmHint, |
| 153 | boldness, italic); |
| 154 | } |
| 155 | |
| 156 | mapper = fileFont.getMapper(); |
| 157 | int numGlyphs = mapper.getNumGlyphs(); |
| 158 | |
| 159 | /* Always segment for fonts with > 2K glyphs, but also for smaller |
| 160 | * fonts with non-typical sizes and transforms. |
| 161 | * Segmenting for all non-typical pt sizes helps to minimise memory |
| 162 | * usage when very many distinct strikes are created. |
| 163 | * The size range of 0->5 and 37->INF for segmenting is arbitrary |
| 164 | * but the intention is that typical GUI integer point sizes (6->36) |
| 165 | * should not segment unless there's another reason to do so. |
| 166 | */ |
| 167 | float ptSize = (float)matrix[3]; // interpreted only when meaningful. |
| 168 | int iSize = (int)ptSize; |
| 169 | boolean isSimpleTx = (at.getType() & complexTX) == 0; |
| 170 | segmentedCache = |
| 171 | (numGlyphs > SEGSIZE << 3) || |
| 172 | ((numGlyphs > SEGSIZE << 1) && |
| 173 | (!isSimpleTx || ptSize != iSize || iSize < 6 || iSize > 36)); |
| 174 | |
| 175 | /* This can only happen if we failed to allocate memory for context. |
| 176 | * NB: in such case we may still have some memory in java heap |
| 177 | * but subsequent attempt to allocate null scaler context |
| 178 | * may fail too (cause it is allocate in the native heap). |
| 179 | * It is not clear how to make this more robust but on the |
| 180 | * other hand getting NULL here seems to be extremely unlikely. |
| 181 | */ |
| 182 | if (pScalerContext == 0L) { |
| 183 | /* REMIND: when the code is updated to install cache objects |
| 184 | * rather than using a switch this will be more efficient. |
| 185 | */ |
| 186 | this.disposer = new FontStrikeDisposer(fileFont, desc); |
| 187 | initGlyphCache(); |
| 188 | pScalerContext = NullFontScaler.getNullScalerContext(); |
| 189 | FontManager.deRegisterBadFont(fileFont); |
| 190 | return; |
| 191 | } |
| 192 | |
| 193 | if (fileFont.checkUseNatives() && desc.aaHint==0 && !algoStyle) { |
| 194 | /* Check its a simple scale of a pt size in the range |
| 195 | * where native bitmaps typically exist (6-36 pts) */ |
| 196 | if (matrix[1] == 0.0 && matrix[2] == 0.0 && |
| 197 | matrix[0] >= 6.0 && matrix[0] <= 36.0 && |
| 198 | matrix[0] == matrix[3]) { |
| 199 | useNatives = true; |
| 200 | int numNatives = fileFont.nativeFonts.length; |
| 201 | nativeStrikes = new NativeStrike[numNatives]; |
| 202 | /* Maybe initialise these strikes lazily?. But we |
| 203 | * know we need at least one |
| 204 | */ |
| 205 | for (int i=0; i<numNatives; i++) { |
| 206 | nativeStrikes[i] = |
| 207 | new NativeStrike(fileFont.nativeFonts[i], desc, false); |
| 208 | } |
| 209 | } |
| 210 | } |
| 211 | |
| 212 | this.disposer = new FontStrikeDisposer(fileFont, desc, pScalerContext); |
| 213 | |
| 214 | /* Always get the image and the advance together for smaller sizes |
| 215 | * that are likely to be important to rendering performance. |
| 216 | * The pixel size of 48.0 can be thought of as |
| 217 | * "maximumSizeForGetImageWithAdvance". |
| 218 | * This should be no greater than OutlineTextRender.THRESHOLD. |
| 219 | */ |
| 220 | getImageWithAdvance = at.getScaleY() <= 48.0; |
| 221 | |
| 222 | /* Some applications request advance frequently during layout. |
| 223 | * If we are not getting and caching the image with the advance, |
| 224 | * there is a potentially significant performance penalty if the |
| 225 | * advance is repeatedly requested before requesting the image. |
| 226 | * We should at least cache the horizontal advance. |
| 227 | * REMIND: could use info in the font, eg hmtx, to retrieve some |
| 228 | * advances. But still want to cache it here. |
| 229 | */ |
| 230 | |
| 231 | if (!getImageWithAdvance) { |
| 232 | if (!segmentedCache) { |
| 233 | horizontalAdvances = new float[numGlyphs]; |
| 234 | /* use max float as uninitialised advance */ |
| 235 | for (int i=0; i<numGlyphs; i++) { |
| 236 | horizontalAdvances[i] = Float.MAX_VALUE; |
| 237 | } |
| 238 | } else { |
| 239 | int numSegments = (numGlyphs + SEGSIZE-1)/SEGSIZE; |
| 240 | segHorizontalAdvances = new float[numSegments][]; |
| 241 | } |
| 242 | } |
| 243 | } |
| 244 | |
| 245 | /* A number of methods are delegated by the strike to the scaler |
| 246 | * context which is a shared resource on a physical font. |
| 247 | */ |
| 248 | |
| 249 | public int getNumGlyphs() { |
| 250 | return fileFont.getNumGlyphs(); |
| 251 | } |
| 252 | |
| 253 | /* Try the native strikes first, then try the fileFont strike */ |
| 254 | long getGlyphImageFromNative(int glyphCode) { |
| 255 | long glyphPtr; |
| 256 | char charCode = fileFont.glyphToCharMap[glyphCode]; |
| 257 | for (int i=0;i<nativeStrikes.length;i++) { |
| 258 | CharToGlyphMapper mapper = fileFont.nativeFonts[i].getMapper(); |
| 259 | int gc = mapper.charToGlyph(charCode)&0xffff; |
| 260 | if (gc != mapper.getMissingGlyphCode()) { |
| 261 | glyphPtr = nativeStrikes[i].getGlyphImagePtrNoCache(gc); |
| 262 | if (glyphPtr != 0L) { |
| 263 | return glyphPtr; |
| 264 | } |
| 265 | } |
| 266 | } |
| 267 | return fileFont.getGlyphImage(pScalerContext, glyphCode); |
| 268 | } |
| 269 | |
| 270 | long getGlyphImagePtr(int glyphCode) { |
| 271 | if (glyphCode >= INVISIBLE_GLYPHS) { |
| 272 | return StrikeCache.invisibleGlyphPtr; |
| 273 | } |
| 274 | long glyphPtr; |
| 275 | if ((glyphPtr = getCachedGlyphPtr(glyphCode)) != 0L) { |
| 276 | return glyphPtr; |
| 277 | } else { |
| 278 | if (useNatives) { |
| 279 | glyphPtr = getGlyphImageFromNative(glyphCode); |
| 280 | } else { |
| 281 | glyphPtr = fileFont.getGlyphImage(pScalerContext, |
| 282 | glyphCode); |
| 283 | } |
| 284 | return setCachedGlyphPtr(glyphCode, glyphPtr); |
| 285 | } |
| 286 | } |
| 287 | |
| 288 | void getGlyphImagePtrs(int[] glyphCodes, long[] images, int len) { |
| 289 | |
| 290 | for (int i=0; i<len; i++) { |
| 291 | int glyphCode = glyphCodes[i]; |
| 292 | if (glyphCode >= INVISIBLE_GLYPHS) { |
| 293 | images[i] = StrikeCache.invisibleGlyphPtr; |
| 294 | continue; |
| 295 | } else if ((images[i] = getCachedGlyphPtr(glyphCode)) != 0L) { |
| 296 | continue; |
| 297 | } else { |
| 298 | long glyphPtr; |
| 299 | if (useNatives) { |
| 300 | glyphPtr = getGlyphImageFromNative(glyphCode); |
| 301 | } else { |
| 302 | glyphPtr = fileFont.getGlyphImage(pScalerContext, |
| 303 | glyphCode); |
| 304 | } |
| 305 | images[i] = setCachedGlyphPtr(glyphCode, glyphPtr); |
| 306 | } |
| 307 | } |
| 308 | } |
| 309 | |
| 310 | /* The following method is called from CompositeStrike as a special case. |
| 311 | */ |
| 312 | private static final int SLOTZEROMAX = 0xffffff; |
| 313 | int getSlot0GlyphImagePtrs(int[] glyphCodes, long[] images, int len) { |
| 314 | |
| 315 | int convertedCnt = 0; |
| 316 | |
| 317 | for (int i=0; i<len; i++) { |
| 318 | int glyphCode = glyphCodes[i]; |
| 319 | if (glyphCode >= SLOTZEROMAX) { |
| 320 | return convertedCnt; |
| 321 | } else { |
| 322 | convertedCnt++; |
| 323 | } |
| 324 | if (glyphCode >= INVISIBLE_GLYPHS) { |
| 325 | images[i] = StrikeCache.invisibleGlyphPtr; |
| 326 | continue; |
| 327 | } else if ((images[i] = getCachedGlyphPtr(glyphCode)) != 0L) { |
| 328 | continue; |
| 329 | } else { |
| 330 | long glyphPtr; |
| 331 | if (useNatives) { |
| 332 | glyphPtr = getGlyphImageFromNative(glyphCode); |
| 333 | } else { |
| 334 | glyphPtr = fileFont.getGlyphImage(pScalerContext, |
| 335 | glyphCode); |
| 336 | } |
| 337 | images[i] = setCachedGlyphPtr(glyphCode, glyphPtr); |
| 338 | } |
| 339 | } |
| 340 | return convertedCnt; |
| 341 | } |
| 342 | |
| 343 | /* Only look in the cache */ |
| 344 | long getCachedGlyphPtr(int glyphCode) { |
| 345 | switch (glyphCacheFormat) { |
| 346 | case INTARRAY: |
| 347 | return intGlyphImages[glyphCode] & INTMASK; |
| 348 | case SEGINTARRAY: |
| 349 | int segIndex = glyphCode >> SEGSHIFT; |
| 350 | if (segIntGlyphImages[segIndex] != null) { |
| 351 | int subIndex = glyphCode % SEGSIZE; |
| 352 | return segIntGlyphImages[segIndex][subIndex] & INTMASK; |
| 353 | } else { |
| 354 | return 0L; |
| 355 | } |
| 356 | case LONGARRAY: |
| 357 | return longGlyphImages[glyphCode]; |
| 358 | case SEGLONGARRAY: |
| 359 | segIndex = glyphCode >> SEGSHIFT; |
| 360 | if (segLongGlyphImages[segIndex] != null) { |
| 361 | int subIndex = glyphCode % SEGSIZE; |
| 362 | return segLongGlyphImages[segIndex][subIndex]; |
| 363 | } else { |
| 364 | return 0L; |
| 365 | } |
| 366 | } |
| 367 | /* If reach here cache is UNINITIALISED. */ |
| 368 | return 0L; |
| 369 | } |
| 370 | |
| 371 | private synchronized long setCachedGlyphPtr(int glyphCode, long glyphPtr) { |
| 372 | switch (glyphCacheFormat) { |
| 373 | case INTARRAY: |
| 374 | if (intGlyphImages[glyphCode] == 0) { |
| 375 | intGlyphImages[glyphCode] = (int)glyphPtr; |
| 376 | return glyphPtr; |
| 377 | } else { |
| 378 | StrikeCache.freeIntPointer((int)glyphPtr); |
| 379 | return intGlyphImages[glyphCode] & INTMASK; |
| 380 | } |
| 381 | |
| 382 | case SEGINTARRAY: |
| 383 | int segIndex = glyphCode >> SEGSHIFT; |
| 384 | int subIndex = glyphCode % SEGSIZE; |
| 385 | if (segIntGlyphImages[segIndex] == null) { |
| 386 | segIntGlyphImages[segIndex] = new int[SEGSIZE]; |
| 387 | } |
| 388 | if (segIntGlyphImages[segIndex][subIndex] == 0) { |
| 389 | segIntGlyphImages[segIndex][subIndex] = (int)glyphPtr; |
| 390 | return glyphPtr; |
| 391 | } else { |
| 392 | StrikeCache.freeIntPointer((int)glyphPtr); |
| 393 | return segIntGlyphImages[segIndex][subIndex] & INTMASK; |
| 394 | } |
| 395 | |
| 396 | case LONGARRAY: |
| 397 | if (longGlyphImages[glyphCode] == 0L) { |
| 398 | longGlyphImages[glyphCode] = glyphPtr; |
| 399 | return glyphPtr; |
| 400 | } else { |
| 401 | StrikeCache.freeLongPointer(glyphPtr); |
| 402 | return longGlyphImages[glyphCode]; |
| 403 | } |
| 404 | |
| 405 | case SEGLONGARRAY: |
| 406 | segIndex = glyphCode >> SEGSHIFT; |
| 407 | subIndex = glyphCode % SEGSIZE; |
| 408 | if (segLongGlyphImages[segIndex] == null) { |
| 409 | segLongGlyphImages[segIndex] = new long[SEGSIZE]; |
| 410 | } |
| 411 | if (segLongGlyphImages[segIndex][subIndex] == 0L) { |
| 412 | segLongGlyphImages[segIndex][subIndex] = glyphPtr; |
| 413 | return glyphPtr; |
| 414 | } else { |
| 415 | StrikeCache.freeLongPointer(glyphPtr); |
| 416 | return segLongGlyphImages[segIndex][subIndex]; |
| 417 | } |
| 418 | } |
| 419 | |
| 420 | /* Reach here only when the cache is not initialised which is only |
| 421 | * for the first glyph to be initialised in the strike. |
| 422 | * Initialise it and recurse. Note that we are already synchronized. |
| 423 | */ |
| 424 | initGlyphCache(); |
| 425 | return setCachedGlyphPtr(glyphCode, glyphPtr); |
| 426 | } |
| 427 | |
| 428 | /* Called only from synchronized code or constructor */ |
| 429 | private void initGlyphCache() { |
| 430 | |
| 431 | int numGlyphs = mapper.getNumGlyphs(); |
| 432 | |
| 433 | if (segmentedCache) { |
| 434 | int numSegments = (numGlyphs + SEGSIZE-1)/SEGSIZE; |
| 435 | if (FontManager.longAddresses) { |
| 436 | glyphCacheFormat = SEGLONGARRAY; |
| 437 | segLongGlyphImages = new long[numSegments][]; |
| 438 | this.disposer.segLongGlyphImages = segLongGlyphImages; |
| 439 | } else { |
| 440 | glyphCacheFormat = SEGINTARRAY; |
| 441 | segIntGlyphImages = new int[numSegments][]; |
| 442 | this.disposer.segIntGlyphImages = segIntGlyphImages; |
| 443 | } |
| 444 | } else { |
| 445 | if (FontManager.longAddresses) { |
| 446 | glyphCacheFormat = LONGARRAY; |
| 447 | longGlyphImages = new long[numGlyphs]; |
| 448 | this.disposer.longGlyphImages = longGlyphImages; |
| 449 | } else { |
| 450 | glyphCacheFormat = INTARRAY; |
| 451 | intGlyphImages = new int[numGlyphs]; |
| 452 | this.disposer.intGlyphImages = intGlyphImages; |
| 453 | } |
| 454 | } |
| 455 | } |
| 456 | |
| 457 | /* Metrics info is always retrieved. If the GlyphInfo address is non-zero |
| 458 | * then metrics info there is valid and can just be copied. |
| 459 | * This is in user space coordinates. |
| 460 | */ |
| 461 | float getGlyphAdvance(int glyphCode) { |
| 462 | float advance; |
| 463 | |
| 464 | if (glyphCode >= INVISIBLE_GLYPHS) { |
| 465 | return 0f; |
| 466 | } |
| 467 | if (horizontalAdvances != null) { |
| 468 | advance = horizontalAdvances[glyphCode]; |
| 469 | if (advance != Float.MAX_VALUE) { |
| 470 | return advance; |
| 471 | } |
| 472 | } else if (segmentedCache && segHorizontalAdvances != null) { |
| 473 | int segIndex = glyphCode >> SEGSHIFT; |
| 474 | float[] subArray = segHorizontalAdvances[segIndex]; |
| 475 | if (subArray != null) { |
| 476 | advance = subArray[glyphCode % SEGSIZE]; |
| 477 | if (advance != Float.MAX_VALUE) { |
| 478 | return advance; |
| 479 | } |
| 480 | } |
| 481 | } |
| 482 | |
| 483 | if (invertDevTx != null) { |
| 484 | /* If there is a device transform need x & y advance to |
| 485 | * transform back into user space. |
| 486 | */ |
| 487 | advance = getGlyphMetrics(glyphCode).x; |
| 488 | } else { |
| 489 | long glyphPtr; |
| 490 | if (getImageWithAdvance) { |
| 491 | /* A heuristic optimisation says that for most cases its |
| 492 | * worthwhile retrieving the image at the same time as the |
| 493 | * advance. So here we get the image data even if its not |
| 494 | * already cached. |
| 495 | */ |
| 496 | glyphPtr = getGlyphImagePtr(glyphCode); |
| 497 | } else { |
| 498 | glyphPtr = getCachedGlyphPtr(glyphCode); |
| 499 | } |
| 500 | if (glyphPtr != 0L) { |
| 501 | advance = StrikeCache.unsafe.getFloat |
| 502 | (glyphPtr + StrikeCache.xAdvanceOffset); |
| 503 | |
| 504 | } else { |
| 505 | advance = fileFont.getGlyphAdvance(pScalerContext, glyphCode); |
| 506 | } |
| 507 | } |
| 508 | |
| 509 | if (horizontalAdvances != null) { |
| 510 | horizontalAdvances[glyphCode] = advance; |
| 511 | } else if (segmentedCache && segHorizontalAdvances != null) { |
| 512 | int segIndex = glyphCode >> SEGSHIFT; |
| 513 | int subIndex = glyphCode % SEGSIZE; |
| 514 | if (segHorizontalAdvances[segIndex] == null) { |
| 515 | segHorizontalAdvances[segIndex] = new float[SEGSIZE]; |
| 516 | for (int i=0; i<SEGSIZE; i++) { |
| 517 | segHorizontalAdvances[segIndex][i] = Float.MAX_VALUE; |
| 518 | } |
| 519 | } |
| 520 | segHorizontalAdvances[segIndex][subIndex] = advance; |
| 521 | } |
| 522 | return advance; |
| 523 | } |
| 524 | |
| 525 | float getCodePointAdvance(int cp) { |
| 526 | return getGlyphAdvance(mapper.charToGlyph(cp)); |
| 527 | } |
| 528 | |
| 529 | /** |
| 530 | * Result and pt are both in device space. |
| 531 | */ |
| 532 | void getGlyphImageBounds(int glyphCode, Point2D.Float pt, |
| 533 | Rectangle result) { |
| 534 | |
| 535 | long ptr = getGlyphImagePtr(glyphCode); |
| 536 | float topLeftX, topLeftY; |
| 537 | |
| 538 | /* With our current design NULL ptr is not possible |
| 539 | but if we eventually allow scalers to return NULL pointers |
| 540 | this check might be actually useful. */ |
| 541 | if (ptr == 0L) { |
| 542 | result.x = (int) Math.floor(pt.x); |
| 543 | result.y = (int) Math.floor(pt.y); |
| 544 | result.width = result.height = 0; |
| 545 | return; |
| 546 | } |
| 547 | |
| 548 | topLeftX = StrikeCache.unsafe.getFloat(ptr+StrikeCache.topLeftXOffset); |
| 549 | topLeftY = StrikeCache.unsafe.getFloat(ptr+StrikeCache.topLeftYOffset); |
| 550 | |
| 551 | result.x = (int)Math.floor(pt.x + topLeftX); |
| 552 | result.y = (int)Math.floor(pt.y + topLeftY); |
| 553 | result.width = |
| 554 | StrikeCache.unsafe.getShort(ptr+StrikeCache.widthOffset) &0x0ffff; |
| 555 | result.height = |
| 556 | StrikeCache.unsafe.getShort(ptr+StrikeCache.heightOffset) &0x0ffff; |
| 557 | |
| 558 | /* HRGB LCD text may have padding that is empty. This is almost always |
| 559 | * going to be when topLeftX is -2 or less. |
| 560 | * Try to return a tighter bounding box in that case. |
| 561 | * If the first three bytes of every row are all zero, then |
| 562 | * add 1 to "x" and reduce "width" by 1. |
| 563 | */ |
| 564 | if ((desc.aaHint == INTVAL_TEXT_ANTIALIAS_LCD_HRGB || |
| 565 | desc.aaHint == INTVAL_TEXT_ANTIALIAS_LCD_HBGR) |
| 566 | && topLeftX <= -2.0f) { |
| 567 | int minx = getGlyphImageMinX(ptr, (int)result.x); |
| 568 | if (minx > result.x) { |
| 569 | result.x += 1; |
| 570 | result.width -=1; |
| 571 | } |
| 572 | } |
| 573 | } |
| 574 | |
| 575 | private int getGlyphImageMinX(long ptr, int origMinX) { |
| 576 | |
| 577 | int width = StrikeCache.unsafe.getChar(ptr+StrikeCache.widthOffset); |
| 578 | int height = StrikeCache.unsafe.getChar(ptr+StrikeCache.heightOffset); |
| 579 | int rowBytes = |
| 580 | StrikeCache.unsafe.getChar(ptr+StrikeCache.rowBytesOffset); |
| 581 | |
| 582 | if (rowBytes == width) { |
| 583 | return origMinX; |
| 584 | } |
| 585 | |
| 586 | long pixelData; |
| 587 | if (StrikeCache.nativeAddressSize == 4) { |
| 588 | pixelData = 0xffffffff & |
| 589 | StrikeCache.unsafe.getInt(ptr + StrikeCache.pixelDataOffset); |
| 590 | } else { |
| 591 | pixelData = |
| 592 | StrikeCache.unsafe.getLong(ptr + StrikeCache.pixelDataOffset); |
| 593 | } |
| 594 | if (pixelData == 0L) { |
| 595 | return origMinX; |
| 596 | } |
| 597 | |
| 598 | for (int y=0;y<height;y++) { |
| 599 | for (int x=0;x<3;x++) { |
| 600 | if (StrikeCache.unsafe.getByte(pixelData+y*rowBytes+x) != 0) { |
| 601 | return origMinX; |
| 602 | } |
| 603 | } |
| 604 | } |
| 605 | return origMinX+1; |
| 606 | } |
| 607 | |
| 608 | /* These 3 metrics methods below should be implemented to return |
| 609 | * values in user space. |
| 610 | */ |
| 611 | StrikeMetrics getFontMetrics() { |
| 612 | if (strikeMetrics == null) { |
| 613 | strikeMetrics = |
| 614 | fileFont.getFontMetrics(pScalerContext); |
| 615 | if (invertDevTx != null) { |
| 616 | strikeMetrics.convertToUserSpace(invertDevTx); |
| 617 | } |
| 618 | } |
| 619 | return strikeMetrics; |
| 620 | } |
| 621 | |
| 622 | Point2D.Float getGlyphMetrics(int glyphCode) { |
| 623 | Point2D.Float metrics = new Point2D.Float(); |
| 624 | |
| 625 | // !!! or do we force sgv user glyphs? |
| 626 | if (glyphCode >= INVISIBLE_GLYPHS) { |
| 627 | return metrics; |
| 628 | } |
| 629 | long glyphPtr; |
| 630 | if (getImageWithAdvance) { |
| 631 | /* A heuristic optimisation says that for most cases its |
| 632 | * worthwhile retrieving the image at the same time as the |
| 633 | * metrics. So here we get the image data even if its not |
| 634 | * already cached. |
| 635 | */ |
| 636 | glyphPtr = getGlyphImagePtr(glyphCode); |
| 637 | } else { |
| 638 | glyphPtr = getCachedGlyphPtr(glyphCode); |
| 639 | } |
| 640 | if (glyphPtr != 0L) { |
| 641 | metrics = new Point2D.Float(); |
| 642 | metrics.x = StrikeCache.unsafe.getFloat |
| 643 | (glyphPtr + StrikeCache.xAdvanceOffset); |
| 644 | metrics.y = StrikeCache.unsafe.getFloat |
| 645 | (glyphPtr + StrikeCache.yAdvanceOffset); |
| 646 | /* advance is currently in device space, need to convert back |
| 647 | * into user space. |
| 648 | * This must not include the translation component. */ |
| 649 | if (invertDevTx != null) { |
| 650 | invertDevTx.deltaTransform(metrics, metrics); |
| 651 | } |
| 652 | } else { |
| 653 | /* We sometimes cache these metrics as they are expensive to |
| 654 | * generate for large glyphs. |
| 655 | * We never reach this path if we obtain images with advances. |
| 656 | * But if we do not obtain images with advances its possible that |
| 657 | * we first obtain this information, then the image, and never |
| 658 | * will access this value again. |
| 659 | */ |
| 660 | Integer key = new Integer(glyphCode); |
| 661 | Point2D.Float value = null; |
| 662 | ConcurrentHashMap<Integer, Point2D.Float> glyphMetricsMap = null; |
| 663 | if (glyphMetricsMapRef != null) { |
| 664 | glyphMetricsMap = glyphMetricsMapRef.get(); |
| 665 | } |
| 666 | if (glyphMetricsMap != null) { |
| 667 | value = glyphMetricsMap.get(key); |
| 668 | if (value != null) { |
| 669 | metrics.x = value.x; |
| 670 | metrics.y = value.y; |
| 671 | /* already in user space */ |
| 672 | return metrics; |
| 673 | } |
| 674 | } |
| 675 | if (value == null) { |
| 676 | fileFont.getGlyphMetrics(pScalerContext, glyphCode, metrics); |
| 677 | /* advance is currently in device space, need to convert back |
| 678 | * into user space. |
| 679 | */ |
| 680 | if (invertDevTx != null) { |
| 681 | invertDevTx.deltaTransform(metrics, metrics); |
| 682 | } |
| 683 | value = new Point2D.Float(metrics.x, metrics.y); |
| 684 | /* We aren't synchronizing here so it is possible to |
| 685 | * overwrite the map with another one but this is harmless. |
| 686 | */ |
| 687 | if (glyphMetricsMap == null) { |
| 688 | glyphMetricsMap = |
| 689 | new ConcurrentHashMap<Integer, Point2D.Float>(); |
| 690 | glyphMetricsMapRef = |
| 691 | new SoftReference<ConcurrentHashMap<Integer, |
| 692 | Point2D.Float>>(glyphMetricsMap); |
| 693 | } |
| 694 | glyphMetricsMap.put(key, value); |
| 695 | } |
| 696 | } |
| 697 | return metrics; |
| 698 | } |
| 699 | |
| 700 | Point2D.Float getCharMetrics(char ch) { |
| 701 | return getGlyphMetrics(mapper.charToGlyph(ch)); |
| 702 | } |
| 703 | |
| 704 | /* The caller of this can be trusted to return a copy of this |
| 705 | * return value rectangle to public API. In fact frequently it |
| 706 | * can't use use this return value directly anyway. |
| 707 | * This returns bounds in device space. Currently the only |
| 708 | * caller is SGV and it converts back to user space. |
| 709 | * We could change things so that this code does the conversion so |
| 710 | * that all coords coming out of the font system are converted back |
| 711 | * into user space even if they were measured in device space. |
| 712 | * The same applies to the other methods that return outlines (below) |
| 713 | * But it may make particular sense for this method that caches its |
| 714 | * results. |
| 715 | * There'd be plenty of exceptions, to this too, eg getGlyphPoint needs |
| 716 | * device coords as its called from native layout and getGlyphImageBounds |
| 717 | * is used by GlyphVector.getGlyphPixelBounds which is specified to |
| 718 | * return device coordinates, the image pointers aren't really used |
| 719 | * up in Java code either. |
| 720 | */ |
| 721 | Rectangle2D.Float getGlyphOutlineBounds(int glyphCode) { |
| 722 | |
| 723 | if (boundsMap == null) { |
| 724 | boundsMap = new ConcurrentHashMap<Integer, Rectangle2D.Float>(); |
| 725 | } |
| 726 | |
| 727 | Integer key = new Integer(glyphCode); |
| 728 | Rectangle2D.Float bounds = boundsMap.get(key); |
| 729 | |
| 730 | if (bounds == null) { |
| 731 | bounds = fileFont.getGlyphOutlineBounds(pScalerContext, glyphCode); |
| 732 | boundsMap.put(key, bounds); |
| 733 | } |
| 734 | return bounds; |
| 735 | } |
| 736 | |
| 737 | public Rectangle2D getOutlineBounds(int glyphCode) { |
| 738 | return fileFont.getGlyphOutlineBounds(pScalerContext, glyphCode); |
| 739 | } |
| 740 | |
| 741 | GeneralPath getGlyphOutline(int glyphCode, float x, float y) { |
| 742 | return fileFont.getGlyphOutline(pScalerContext, glyphCode, x, y); |
| 743 | } |
| 744 | |
| 745 | GeneralPath getGlyphVectorOutline(int[] glyphs, float x, float y) { |
| 746 | return fileFont.getGlyphVectorOutline(pScalerContext, |
| 747 | glyphs, glyphs.length, x, y); |
| 748 | } |
| 749 | |
| 750 | protected void adjustPoint(Point2D.Float pt) { |
| 751 | if (invertDevTx != null) { |
| 752 | invertDevTx.deltaTransform(pt, pt); |
| 753 | } |
| 754 | } |
| 755 | } |