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| 1 /* libs/graphics/ports/SkFontHost_android.cpp | |
| 2 ** | |
| 3 ** Copyright 2006, The Android Open Source Project | |
| 4 ** | |
| 5 ** Licensed under the Apache License, Version 2.0 (the "License"); | |
| 6 ** you may not use this file except in compliance with the License. | |
| 7 ** You may obtain a copy of the License at | |
| 8 ** | |
| 9 ** http://www.apache.org/licenses/LICENSE-2.0 | |
| 10 ** | |
| 11 ** Unless required by applicable law or agreed to in writing, software | |
| 12 ** distributed under the License is distributed on an "AS IS" BASIS, | |
| 13 ** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | |
| 14 ** See the License for the specific language governing permissions and | |
| 15 ** limitations under the License. | |
| 16 */ | |
| 17 | |
| 18 #include "SkFontHost.h" | |
| 19 #include "SkDescriptor.h" | |
| 20 #include "SkMMapStream.h" | |
| 21 #include "SkPaint.h" | |
| 22 #include "SkString.h" | |
| 23 #include "SkStream.h" | |
| 24 #include "SkThread.h" | |
| 25 #include "SkTSearch.h" | |
| 26 #include <stdio.h> | |
| 27 | |
| 28 #define FONT_CACHE_MEMORY_BUDGET (768 * 1024) | |
| 29 | |
| 30 #ifndef SK_FONT_FILE_PREFIX | |
| 31 #define SK_FONT_FILE_PREFIX "/fonts/" | |
| 32 #endif | |
| 33 | |
| 34 SkTypeface::Style find_name_and_style(SkStream* stream, SkString* name); | |
| 35 | |
| 36 static void GetFullPathForSysFonts(SkString* full, const char name[]) | |
| 37 { | |
| 38 full->set(getenv("ANDROID_ROOT")); | |
| 39 full->append(SK_FONT_FILE_PREFIX); | |
| 40 full->append(name); | |
| 41 } | |
| 42 | |
| 43 /////////////////////////////////////////////////////////////////////////////// | |
| 44 | |
| 45 struct FamilyRec; | |
| 46 | |
| 47 /* This guy holds a mapping of a name -> family, used for looking up fonts. | |
| 48 Since it is stored in a stretchy array that doesn't preserve object | |
| 49 semantics, we don't use constructor/destructors, but just have explicit | |
| 50 helpers to manage our internal bookkeeping. | |
| 51 */ | |
| 52 struct NameFamilyPair { | |
| 53 const char* fName; // we own this | |
| 54 FamilyRec* fFamily; // we don't own this, we just reference it | |
| 55 | |
| 56 void construct(const char name[], FamilyRec* family) | |
| 57 { | |
| 58 fName = strdup(name); | |
| 59 fFamily = family; // we don't own this, so just record the referene | |
| 60 } | |
| 61 void destruct() | |
| 62 { | |
| 63 free((char*)fName); | |
| 64 // we don't own family, so just ignore our reference | |
| 65 } | |
| 66 }; | |
| 67 | |
| 68 // we use atomic_inc to grow this for each typeface we create | |
| 69 static int32_t gUniqueFontID; | |
| 70 | |
| 71 // this is the mutex that protects these globals | |
| 72 static SkMutex gFamilyMutex; | |
| 73 static FamilyRec* gFamilyHead; | |
| 74 static SkTDArray<NameFamilyPair> gNameList; | |
| 75 | |
| 76 struct FamilyRec { | |
| 77 FamilyRec* fNext; | |
| 78 SkTypeface* fFaces[4]; | |
| 79 | |
| 80 FamilyRec() | |
| 81 { | |
| 82 fNext = gFamilyHead; | |
| 83 memset(fFaces, 0, sizeof(fFaces)); | |
| 84 gFamilyHead = this; | |
| 85 } | |
| 86 }; | |
| 87 | |
| 88 static SkTypeface* find_best_face(const FamilyRec* family, | |
| 89 SkTypeface::Style style) | |
| 90 { | |
| 91 SkTypeface* const* faces = family->fFaces; | |
| 92 | |
| 93 if (faces[style] != NULL) { // exact match | |
| 94 return faces[style]; | |
| 95 } | |
| 96 // look for a matching bold | |
| 97 style = (SkTypeface::Style)(style ^ SkTypeface::kItalic); | |
| 98 if (faces[style] != NULL) { | |
| 99 return faces[style]; | |
| 100 } | |
| 101 // look for the plain | |
| 102 if (faces[SkTypeface::kNormal] != NULL) { | |
| 103 return faces[SkTypeface::kNormal]; | |
| 104 } | |
| 105 // look for anything | |
| 106 for (int i = 0; i < 4; i++) { | |
| 107 if (faces[i] != NULL) { | |
| 108 return faces[i]; | |
| 109 } | |
| 110 } | |
| 111 // should never get here, since the faces list should not be empty | |
| 112 SkASSERT(!"faces list is empty"); | |
| 113 return NULL; | |
| 114 } | |
| 115 | |
| 116 static FamilyRec* find_family(const SkTypeface* member) | |
| 117 { | |
| 118 FamilyRec* curr = gFamilyHead; | |
| 119 while (curr != NULL) { | |
| 120 for (int i = 0; i < 4; i++) { | |
| 121 if (curr->fFaces[i] == member) { | |
| 122 return curr; | |
| 123 } | |
| 124 } | |
| 125 curr = curr->fNext; | |
| 126 } | |
| 127 return NULL; | |
| 128 } | |
| 129 | |
| 130 static SkTypeface* resolve_uniqueID(uint32_t uniqueID) | |
| 131 { | |
| 132 FamilyRec* curr = gFamilyHead; | |
| 133 while (curr != NULL) { | |
| 134 for (int i = 0; i < 4; i++) { | |
| 135 SkTypeface* face = curr->fFaces[i]; | |
| 136 if (face != NULL && face->uniqueID() == uniqueID) { | |
| 137 return face; | |
| 138 } | |
| 139 } | |
| 140 curr = curr->fNext; | |
| 141 } | |
| 142 return NULL; | |
| 143 } | |
| 144 | |
| 145 /* Remove reference to this face from its family. If the resulting family | |
| 146 is empty (has no faces), return that family, otherwise return NULL | |
| 147 */ | |
| 148 static FamilyRec* remove_from_family(const SkTypeface* face) | |
| 149 { | |
| 150 FamilyRec* family = find_family(face); | |
| 151 SkASSERT(family->fFaces[face->style()] == face); | |
| 152 family->fFaces[face->style()] = NULL; | |
| 153 | |
| 154 for (int i = 0; i < 4; i++) { | |
| 155 if (family->fFaces[i] != NULL) { // family is non-empty | |
| 156 return NULL; | |
| 157 } | |
| 158 } | |
| 159 return family; // return the empty family | |
| 160 } | |
| 161 | |
| 162 // maybe we should make FamilyRec be doubly-linked | |
| 163 static void detach_and_delete_family(FamilyRec* family) | |
| 164 { | |
| 165 FamilyRec* curr = gFamilyHead; | |
| 166 FamilyRec* prev = NULL; | |
| 167 | |
| 168 while (curr != NULL) { | |
| 169 FamilyRec* next = curr->fNext; | |
| 170 if (curr == family) { | |
| 171 if (prev == NULL) { | |
| 172 gFamilyHead = next; | |
| 173 } else { | |
| 174 prev->fNext = next; | |
| 175 } | |
| 176 SkDELETE(family); | |
| 177 return; | |
| 178 } | |
| 179 prev = curr; | |
| 180 curr = next; | |
| 181 } | |
| 182 SkASSERT(!"Yikes, couldn't find family in our list to remove/delete"); | |
| 183 } | |
| 184 | |
| 185 static SkTypeface* find_typeface(const char name[], SkTypeface::Style style) | |
| 186 { | |
| 187 NameFamilyPair* list = gNameList.begin(); | |
| 188 int count = gNameList.count(); | |
| 189 | |
| 190 int index = SkStrLCSearch(&list[0].fName, count, name, sizeof(list[0])); | |
| 191 | |
| 192 if (index >= 0) { | |
| 193 return find_best_face(list[index].fFamily, style); | |
| 194 } | |
| 195 return NULL; | |
| 196 } | |
| 197 | |
| 198 static SkTypeface* find_typeface(const SkTypeface* familyMember, | |
| 199 SkTypeface::Style style) | |
| 200 { | |
| 201 const FamilyRec* family = find_family(familyMember); | |
| 202 return family ? find_best_face(family, style) : NULL; | |
| 203 } | |
| 204 | |
| 205 static void add_name(const char name[], FamilyRec* family) | |
| 206 { | |
| 207 SkAutoAsciiToLC tolc(name); | |
| 208 name = tolc.lc(); | |
| 209 | |
| 210 NameFamilyPair* list = gNameList.begin(); | |
| 211 int count = gNameList.count(); | |
| 212 | |
| 213 int index = SkStrLCSearch(&list[0].fName, count, name, sizeof(list[0])); | |
| 214 | |
| 215 if (index < 0) { | |
| 216 list = gNameList.insert(~index); | |
| 217 list->construct(name, family); | |
| 218 } | |
| 219 } | |
| 220 | |
| 221 static void remove_from_names(FamilyRec* emptyFamily) | |
| 222 { | |
| 223 #ifdef SK_DEBUG | |
| 224 for (int i = 0; i < 4; i++) { | |
| 225 SkASSERT(emptyFamily->fFaces[i] == NULL); | |
| 226 } | |
| 227 #endif | |
| 228 | |
| 229 SkTDArray<NameFamilyPair>& list = gNameList; | |
| 230 | |
| 231 // must go backwards when removing | |
| 232 for (int i = list.count() - 1; i >= 0; --i) { | |
| 233 NameFamilyPair* pair = &list[i]; | |
| 234 if (pair->fFamily == emptyFamily) { | |
| 235 pair->destruct(); | |
| 236 list.remove(i); | |
| 237 } | |
| 238 } | |
| 239 } | |
| 240 | |
| 241 /////////////////////////////////////////////////////////////////////////////// | |
| 242 | |
| 243 class FamilyTypeface : public SkTypeface { | |
| 244 public: | |
| 245 FamilyTypeface(Style style, bool sysFont, SkTypeface* familyMember) | |
| 246 : SkTypeface(style, sk_atomic_inc(&gUniqueFontID) + 1) | |
| 247 { | |
| 248 fIsSysFont = sysFont; | |
| 249 | |
| 250 SkAutoMutexAcquire ac(gFamilyMutex); | |
| 251 | |
| 252 FamilyRec* rec = NULL; | |
| 253 if (familyMember) { | |
| 254 rec = find_family(familyMember); | |
| 255 SkASSERT(rec); | |
| 256 } else { | |
| 257 rec = SkNEW(FamilyRec); | |
| 258 } | |
| 259 rec->fFaces[style] = this; | |
| 260 } | |
| 261 | |
| 262 virtual ~FamilyTypeface() | |
| 263 { | |
| 264 SkAutoMutexAcquire ac(gFamilyMutex); | |
| 265 | |
| 266 // remove us from our family. If the family is now empty, we return | |
| 267 // that and then remove that family from the name list | |
| 268 FamilyRec* family = remove_from_family(this); | |
| 269 if (NULL != family) { | |
| 270 remove_from_names(family); | |
| 271 detach_and_delete_family(family); | |
| 272 } | |
| 273 } | |
| 274 | |
| 275 bool isSysFont() const { return fIsSysFont; } | |
| 276 | |
| 277 virtual SkStream* openStream() = 0; | |
| 278 virtual void closeStream(SkStream*) = 0; | |
| 279 virtual const char* getUniqueString() const = 0; | |
| 280 | |
| 281 private: | |
| 282 bool fIsSysFont; | |
| 283 | |
| 284 typedef SkTypeface INHERITED; | |
| 285 }; | |
| 286 | |
| 287 /////////////////////////////////////////////////////////////////////////////// | |
| 288 | |
| 289 class StreamTypeface : public FamilyTypeface { | |
| 290 public: | |
| 291 StreamTypeface(Style style, bool sysFont, SkTypeface* familyMember, | |
| 292 SkStream* stream) | |
| 293 : INHERITED(style, sysFont, familyMember) | |
| 294 { | |
| 295 fStream = stream; | |
| 296 } | |
| 297 virtual ~StreamTypeface() | |
| 298 { | |
| 299 SkDELETE(fStream); | |
| 300 } | |
| 301 | |
| 302 // overrides | |
| 303 virtual SkStream* openStream() { return fStream; } | |
| 304 virtual void closeStream(SkStream*) {} | |
| 305 virtual const char* getUniqueString() const { return NULL; } | |
| 306 | |
| 307 private: | |
| 308 SkStream* fStream; | |
| 309 | |
| 310 typedef FamilyTypeface INHERITED; | |
| 311 }; | |
| 312 | |
| 313 class FileTypeface : public FamilyTypeface { | |
| 314 public: | |
| 315 FileTypeface(Style style, bool sysFont, SkTypeface* familyMember, | |
| 316 const char path[]) | |
| 317 : INHERITED(style, sysFont, familyMember) | |
| 318 { | |
| 319 SkString fullpath; | |
| 320 | |
| 321 if (sysFont) { | |
| 322 GetFullPathForSysFonts(&fullpath, path); | |
| 323 path = fullpath.c_str(); | |
| 324 } | |
| 325 fPath.set(path); | |
| 326 } | |
| 327 | |
| 328 // overrides | |
| 329 virtual SkStream* openStream() | |
| 330 { | |
| 331 SkStream* stream = SkNEW_ARGS(SkMMAPStream, (fPath.c_str())); | |
| 332 | |
| 333 // check for failure | |
| 334 if (stream->getLength() <= 0) { | |
| 335 SkDELETE(stream); | |
| 336 // maybe MMAP isn't supported. try FILE | |
| 337 stream = SkNEW_ARGS(SkFILEStream, (fPath.c_str())); | |
| 338 if (stream->getLength() <= 0) { | |
| 339 SkDELETE(stream); | |
| 340 stream = NULL; | |
| 341 } | |
| 342 } | |
| 343 return stream; | |
| 344 } | |
| 345 virtual void closeStream(SkStream* stream) | |
| 346 { | |
| 347 SkDELETE(stream); | |
| 348 } | |
| 349 virtual const char* getUniqueString() const { | |
| 350 const char* str = strrchr(fPath.c_str(), '/'); | |
| 351 if (str) { | |
| 352 str += 1; // skip the '/' | |
| 353 } | |
| 354 return str; | |
| 355 } | |
| 356 | |
| 357 private: | |
| 358 SkString fPath; | |
| 359 | |
| 360 typedef FamilyTypeface INHERITED; | |
| 361 }; | |
| 362 | |
| 363 /////////////////////////////////////////////////////////////////////////////// | |
| 364 /////////////////////////////////////////////////////////////////////////////// | |
| 365 | |
| 366 static bool get_name_and_style(const char path[], SkString* name, | |
| 367 SkTypeface::Style* style) | |
| 368 { | |
| 369 SkString fullpath; | |
| 370 GetFullPathForSysFonts(&fullpath, path); | |
| 371 | |
| 372 SkMMAPStream stream(fullpath.c_str()); | |
| 373 if (stream.getLength() > 0) { | |
| 374 *style = find_name_and_style(&stream, name); | |
| 375 return true; | |
| 376 } | |
| 377 else { | |
| 378 SkFILEStream stream(fullpath.c_str()); | |
| 379 if (stream.getLength() > 0) { | |
| 380 *style = find_name_and_style(&stream, name); | |
| 381 return true; | |
| 382 } | |
| 383 } | |
| 384 | |
| 385 SkDebugf("---- failed to open <%s> as a font\n", fullpath.c_str()); | |
| 386 return false; | |
| 387 } | |
| 388 | |
| 389 struct FontInitRec { | |
| 390 const char* fFileName; | |
| 391 const char* const* fNames; // null-terminated list | |
| 392 }; | |
| 393 | |
| 394 static const char* gSansNames[] = { | |
| 395 "sans-serif", "arial", "helvetica", "tahoma", "verdana", NULL | |
| 396 }; | |
| 397 | |
| 398 static const char* gSerifNames[] = { | |
| 399 "serif", "times", "times new roman", "palatino", "georgia", "baskerville", | |
| 400 "goudy", "fantasy", "cursive", "ITC Stone Serif", NULL | |
| 401 }; | |
| 402 | |
| 403 static const char* gMonoNames[] = { | |
| 404 "monospace", "courier", "courier new", "monaco", NULL | |
| 405 }; | |
| 406 | |
| 407 static const char* gFBNames[] = { NULL }; | |
| 408 | |
| 409 /* Fonts must be grouped by family, with the first font in a family having the | |
| 410 list of names (even if that list is empty), and the following members having | |
| 411 null for the list. The names list must be NULL-terminated | |
| 412 */ | |
| 413 static const FontInitRec gSystemFonts[] = { | |
| 414 { "DroidSans.ttf", gSansNames }, | |
| 415 { "DroidSans-Bold.ttf", NULL }, | |
| 416 { "DroidSerif-Regular.ttf", gSerifNames }, | |
| 417 { "DroidSerif-Bold.ttf", NULL }, | |
| 418 { "DroidSerif-Italic.ttf", NULL }, | |
| 419 { "DroidSerif-BoldItalic.ttf", NULL }, | |
| 420 { "DroidSansMono.ttf", gMonoNames }, | |
| 421 { "DroidSansFallback.ttf", gFBNames } | |
| 422 }; | |
| 423 | |
| 424 #define DEFAULT_NAMES gSansNames | |
| 425 | |
| 426 // these globals are assigned (once) by load_system_fonts() | |
| 427 static SkTypeface* gFallBackTypeface; | |
| 428 static FamilyRec* gDefaultFamily; | |
| 429 static SkTypeface* gDefaultNormal; | |
| 430 | |
| 431 static void load_system_fonts() | |
| 432 { | |
| 433 // check if we've already be called | |
| 434 if (NULL != gDefaultNormal) { | |
| 435 return; | |
| 436 } | |
| 437 | |
| 438 const FontInitRec* rec = gSystemFonts; | |
| 439 SkTypeface* firstInFamily = NULL; | |
| 440 | |
| 441 for (size_t i = 0; i < SK_ARRAY_COUNT(gSystemFonts); i++) { | |
| 442 // if we're the first in a new family, clear firstInFamily | |
| 443 if (rec[i].fNames != NULL) { | |
| 444 firstInFamily = NULL; | |
| 445 } | |
| 446 | |
| 447 SkString name; | |
| 448 SkTypeface::Style style; | |
| 449 | |
| 450 if (!get_name_and_style(rec[i].fFileName, &name, &style)) { | |
| 451 SkDebugf("------ can't load <%s> as a font\n", rec[i].fFileName); | |
| 452 continue; | |
| 453 } | |
| 454 | |
| 455 SkTypeface* tf = SkNEW_ARGS(FileTypeface, | |
| 456 (style, | |
| 457 true, // system-font (cannot delete) | |
| 458 firstInFamily, // what family to join | |
| 459 rec[i].fFileName) // filename | |
| 460 ); | |
| 461 | |
| 462 if (rec[i].fNames != NULL) { | |
| 463 firstInFamily = tf; | |
| 464 const char* const* names = rec[i].fNames; | |
| 465 | |
| 466 // record the fallback if this is it | |
| 467 if (names == gFBNames) { | |
| 468 gFallBackTypeface = tf; | |
| 469 } | |
| 470 // record the default family if this is it | |
| 471 if (names == DEFAULT_NAMES) { | |
| 472 gDefaultFamily = find_family(tf); | |
| 473 } | |
| 474 // add the names to map to this family | |
| 475 FamilyRec* family = find_family(tf); | |
| 476 while (*names) { | |
| 477 add_name(*names, family); | |
| 478 names += 1; | |
| 479 } | |
| 480 } | |
| 481 | |
| 482 } | |
| 483 | |
| 484 // do this after all fonts are loaded. This is our default font, and it | |
| 485 // acts as a sentinel so we only execute load_system_fonts() once | |
| 486 gDefaultNormal = find_best_face(gDefaultFamily, SkTypeface::kNormal); | |
| 487 } | |
| 488 | |
| 489 /////////////////////////////////////////////////////////////////////////////// | |
| 490 | |
| 491 void SkFontHost::Serialize(const SkTypeface* face, SkWStream* stream) { | |
| 492 const char* name = ((FamilyTypeface*)face)->getUniqueString(); | |
| 493 | |
| 494 stream->write8((uint8_t)face->getStyle()); | |
| 495 | |
| 496 if (NULL == name || 0 == *name) { | |
| 497 stream->writePackedUInt(0); | |
| 498 // SkDebugf("--- fonthost serialize null\n"); | |
| 499 } else { | |
| 500 uint32_t len = strlen(name); | |
| 501 stream->writePackedUInt(len); | |
| 502 stream->write(name, len); | |
| 503 // SkDebugf("--- fonthost serialize <%s> %d\n", name, face->getStyle()); | |
| 504 } | |
| 505 } | |
| 506 | |
| 507 SkTypeface* SkFontHost::Deserialize(SkStream* stream) { | |
| 508 load_system_fonts(); | |
| 509 | |
| 510 int style = stream->readU8(); | |
| 511 | |
| 512 int len = stream->readPackedUInt(); | |
| 513 if (len > 0) { | |
| 514 SkString str; | |
| 515 str.resize(len); | |
| 516 stream->read(str.writable_str(), len); | |
| 517 | |
| 518 const FontInitRec* rec = gSystemFonts; | |
| 519 for (size_t i = 0; i < SK_ARRAY_COUNT(gSystemFonts); i++) { | |
| 520 if (strcmp(rec[i].fFileName, str.c_str()) == 0) { | |
| 521 // backup until we hit the fNames | |
| 522 for (int j = i; j >= 0; --j) { | |
| 523 if (rec[j].fNames != NULL) { | |
| 524 return SkFontHost::FindTypeface(NULL, rec[j].fNames[0], | |
| 525 (SkTypeface::Style)style); | |
| 526 } | |
| 527 } | |
| 528 } | |
| 529 } | |
| 530 } | |
| 531 return SkFontHost::FindTypeface(NULL, NULL, (SkTypeface::Style)style); | |
| 532 } | |
| 533 | |
| 534 /////////////////////////////////////////////////////////////////////////////// | |
| 535 | |
| 536 SkTypeface* SkFontHost::FindTypeface(const SkTypeface* familyFace, | |
| 537 const char familyName[], | |
| 538 SkTypeface::Style style) | |
| 539 { | |
| 540 load_system_fonts(); | |
| 541 | |
| 542 SkAutoMutexAcquire ac(gFamilyMutex); | |
| 543 | |
| 544 // clip to legal style bits | |
| 545 style = (SkTypeface::Style)(style & SkTypeface::kBoldItalic); | |
| 546 | |
| 547 SkTypeface* tf = NULL; | |
| 548 | |
| 549 if (NULL != familyFace) { | |
| 550 tf = find_typeface(familyFace, style); | |
| 551 } else if (NULL != familyName) { | |
| 552 // SkDebugf("======= familyName <%s>\n", familyName); | |
| 553 tf = find_typeface(familyName, style); | |
| 554 } | |
| 555 | |
| 556 if (NULL == tf) { | |
| 557 tf = find_best_face(gDefaultFamily, style); | |
| 558 } | |
| 559 | |
| 560 return tf; | |
| 561 } | |
| 562 | |
| 563 SkTypeface* SkFontHost::ResolveTypeface(uint32_t fontID) | |
| 564 { | |
| 565 SkAutoMutexAcquire ac(gFamilyMutex); | |
| 566 | |
| 567 return resolve_uniqueID(fontID); | |
| 568 } | |
| 569 | |
| 570 SkStream* SkFontHost::OpenStream(uint32_t fontID) | |
| 571 { | |
| 572 | |
| 573 FamilyTypeface* tf = (FamilyTypeface*)SkFontHost::ResolveTypeface(fontID); | |
| 574 SkStream* stream = tf ? tf->openStream() : NULL; | |
| 575 | |
| 576 if (NULL == stream || stream->getLength() == 0) { | |
| 577 delete stream; | |
| 578 stream = NULL; | |
| 579 } | |
| 580 return stream; | |
| 581 } | |
| 582 | |
| 583 void SkFontHost::CloseStream(uint32_t fontID, SkStream* stream) | |
| 584 { | |
| 585 FamilyTypeface* tf = (FamilyTypeface*)SkFontHost::ResolveTypeface(fontID); | |
| 586 if (NULL != tf) { | |
| 587 tf->closeStream(stream); | |
| 588 } | |
| 589 } | |
| 590 | |
| 591 SkScalerContext* SkFontHost::CreateFallbackScalerContext( | |
| 592 const SkScalerContext::Rec& rec) | |
| 593 { | |
| 594 load_system_fonts(); | |
| 595 | |
| 596 SkAutoDescriptor ad(sizeof(rec) + SkDescriptor::ComputeOverhead(1)); | |
| 597 SkDescriptor* desc = ad.getDesc(); | |
| 598 | |
| 599 desc->init(); | |
| 600 SkScalerContext::Rec* newRec = | |
| 601 (SkScalerContext::Rec*)desc->addEntry(kRec_SkDescriptorTag, | |
| 602 sizeof(rec), &rec); | |
| 603 newRec->fFontID = gFallBackTypeface->uniqueID(); | |
| 604 desc->computeChecksum(); | |
| 605 | |
| 606 return SkFontHost::CreateScalerContext(desc); | |
| 607 } | |
| 608 | |
| 609 /////////////////////////////////////////////////////////////////////////////// | |
| 610 | |
| 611 SkTypeface* SkFontHost::CreateTypeface(SkStream* stream) | |
| 612 { | |
| 613 if (NULL == stream || stream->getLength() <= 0) { | |
| 614 SkDELETE(stream); | |
| 615 return NULL; | |
| 616 } | |
| 617 | |
| 618 SkString name; | |
| 619 SkTypeface::Style style = find_name_and_style(stream, &name); | |
| 620 | |
| 621 return SkNEW_ARGS(StreamTypeface, (style, false, NULL, stream)); | |
| 622 } | |
| 623 | |
| 624 /////////////////////////////////////////////////////////////////////////////// | |
| 625 | |
| 626 size_t SkFontHost::ShouldPurgeFontCache(size_t sizeAllocatedSoFar) | |
| 627 { | |
| 628 if (sizeAllocatedSoFar > FONT_CACHE_MEMORY_BUDGET) | |
| 629 return sizeAllocatedSoFar - FONT_CACHE_MEMORY_BUDGET; | |
| 630 else | |
| 631 return 0; // nothing to do | |
| 632 } | |
| 633 | |
| OLD | NEW |
|---|
Chromium Code Reviews
Issue 113827:
Remove the remainder of the skia source code from the Chromium repo.... (Closed)
Base URL: svn://chrome-svn/chrome/trunk/src/