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| 1 /* | |
| 2 * Copyright 2006 The Android Open Source Project | |
| 3 * | |
| 4 * Use of this source code is governed by a BSD-style license that can be | |
| 5 * found in the LICENSE file. | |
| 6 */ | |
| 7 | |
| 8 #include "SkFontHost.h" | |
| 9 #include "SkFontHost_FreeType_common.h" | |
| 10 #include "SkFontDescriptor.h" | |
| 11 #include "SkGraphics.h" | |
| 12 #include "SkDescriptor.h" | |
| 13 #include "SkPaint.h" | |
| 14 #include "SkString.h" | |
| 15 #include "SkStream.h" | |
| 16 #include "SkThread.h" | |
| 17 #include "SkTSearch.h" | |
| 18 #include "SkTypeface_android.h" | |
| 19 #include "FontHostConfiguration_android.h" | |
| 20 | |
| 21 #ifndef SK_FONT_FILE_PREFIX | |
| 22 #define SK_FONT_FILE_PREFIX "/fonts/" | |
| 23 #endif | |
| 24 | |
| 25 #ifndef SK_DEBUG_FONTS | |
| 26 #define SK_DEBUG_FONTS 0 | |
| 27 #endif | |
| 28 | |
| 29 // For test only. | |
| 30 static const char* gTestMainConfigFile = NULL; | |
| 31 static const char* gTestFallbackConfigFile = NULL; | |
| 32 static const char* gTestFontFilePrefix = NULL; | |
| 33 | |
| 34 bool find_name_and_attributes(SkStream* stream, SkString* name, | |
| 35 SkTypeface::Style* style, bool* isFixedPitch); | |
| 36 | |
| 37 static void GetFullPathForSysFonts(SkString* full, const char name[]) { | |
| 38 if (gTestFontFilePrefix) { | |
| 39 full->set(gTestFontFilePrefix); | |
| 40 } else { | |
| 41 full->set(getenv("ANDROID_ROOT")); | |
| 42 full->append(SK_FONT_FILE_PREFIX); | |
| 43 } | |
| 44 full->append(name); | |
| 45 } | |
| 46 | |
| 47 /////////////////////////////////////////////////////////////////////////////// | |
| 48 | |
| 49 struct FamilyRec; | |
| 50 | |
| 51 /* This guy holds a mapping of a name -> family, used for looking up fonts. | |
| 52 Since it is stored in a stretchy array that doesn't preserve object | |
| 53 semantics, we don't use constructor/destructors, but just have explicit | |
| 54 helpers to manage our internal bookkeeping. | |
| 55 */ | |
| 56 struct NameFamilyPair { | |
| 57 const char* fName; // we own this | |
| 58 FamilyRec* fFamily; // we don't own this, we just reference it | |
| 59 | |
| 60 void construct(const char name[], FamilyRec* family) { | |
| 61 fName = strdup(name); | |
| 62 fFamily = family; // we don't own this, so just record the referene | |
| 63 } | |
| 64 | |
| 65 void destruct() { | |
| 66 free((char*)fName); | |
| 67 // we don't own family, so just ignore our reference | |
| 68 } | |
| 69 }; | |
| 70 typedef SkTDArray<NameFamilyPair> NameFamilyPairList; | |
| 71 | |
| 72 // we use atomic_inc to grow this for each typeface we create | |
| 73 static int32_t gUniqueFontID; | |
| 74 | |
| 75 // this is the mutex that protects gFamilyHead and GetNameList() | |
| 76 SK_DECLARE_STATIC_MUTEX(gFamilyHeadAndNameListMutex); | |
| 77 static FamilyRec* gFamilyHead; | |
| 78 | |
| 79 static NameFamilyPairList& GetNameList() { | |
| 80 /* | |
| 81 * It is assumed that the caller has already acquired a lock on | |
| 82 * gFamilyHeadAndNameListMutex before calling this. | |
| 83 */ | |
| 84 static NameFamilyPairList* gNameList; | |
| 85 if (NULL == gNameList) { | |
| 86 gNameList = SkNEW(NameFamilyPairList); | |
| 87 // register a delete proc with sk_atexit(..) when available | |
| 88 } | |
| 89 return *gNameList; | |
| 90 } | |
| 91 | |
| 92 struct FamilyRec { | |
| 93 FamilyRec* fNext; | |
| 94 SkTypeface* fFaces[4]; | |
| 95 | |
| 96 FamilyRec() | |
| 97 { | |
| 98 fNext = gFamilyHead; | |
| 99 memset(fFaces, 0, sizeof(fFaces)); | |
| 100 gFamilyHead = this; | |
| 101 } | |
| 102 }; | |
| 103 | |
| 104 static SkTypeface* find_best_face(const FamilyRec* family, | |
| 105 SkTypeface::Style style) { | |
| 106 SkTypeface* const* faces = family->fFaces; | |
| 107 | |
| 108 if (faces[style] != NULL) { // exact match | |
| 109 return faces[style]; | |
| 110 } | |
| 111 // look for a matching bold | |
| 112 style = (SkTypeface::Style)(style ^ SkTypeface::kItalic); | |
| 113 if (faces[style] != NULL) { | |
| 114 return faces[style]; | |
| 115 } | |
| 116 // look for the plain | |
| 117 if (faces[SkTypeface::kNormal] != NULL) { | |
| 118 return faces[SkTypeface::kNormal]; | |
| 119 } | |
| 120 // look for anything | |
| 121 for (int i = 0; i < 4; i++) { | |
| 122 if (faces[i] != NULL) { | |
| 123 return faces[i]; | |
| 124 } | |
| 125 } | |
| 126 // should never get here, since the faces list should not be empty | |
| 127 SkDEBUGFAIL("faces list is empty"); | |
| 128 return NULL; | |
| 129 } | |
| 130 | |
| 131 static FamilyRec* find_family(const SkTypeface* member) { | |
| 132 FamilyRec* curr = gFamilyHead; | |
| 133 while (curr != NULL) { | |
| 134 for (int i = 0; i < 4; i++) { | |
| 135 if (curr->fFaces[i] == member) { | |
| 136 return curr; | |
| 137 } | |
| 138 } | |
| 139 curr = curr->fNext; | |
| 140 } | |
| 141 return NULL; | |
| 142 } | |
| 143 | |
| 144 // gFamilyHeadAndNameListMutex must already be acquired | |
| 145 static const char* find_family_name(const SkTypeface* member) { | |
| 146 FamilyRec* family = find_family(member); | |
| 147 if (NULL == family) { | |
| 148 return NULL; | |
| 149 } | |
| 150 | |
| 151 NameFamilyPairList& namelist = GetNameList(); | |
| 152 NameFamilyPair* list = namelist.begin(); | |
| 153 int count = namelist.count(); | |
| 154 | |
| 155 for (int i = 0; i < count; i++) { | |
| 156 NameFamilyPair* pair = &list[i]; | |
| 157 if (pair->fFamily == family) { | |
| 158 return pair->fName; | |
| 159 } | |
| 160 } | |
| 161 | |
| 162 return NULL; | |
| 163 } | |
| 164 | |
| 165 /* Returns the matching typeface, or NULL. If a typeface is found, its refcnt | |
| 166 is not modified. | |
| 167 */ | |
| 168 static SkTypeface* find_from_uniqueID(uint32_t uniqueID) { | |
| 169 FamilyRec* curr = gFamilyHead; | |
| 170 while (curr != NULL) { | |
| 171 for (int i = 0; i < 4; i++) { | |
| 172 SkTypeface* face = curr->fFaces[i]; | |
| 173 if (face != NULL && face->uniqueID() == uniqueID) { | |
| 174 return face; | |
| 175 } | |
| 176 } | |
| 177 curr = curr->fNext; | |
| 178 } | |
| 179 return NULL; | |
| 180 } | |
| 181 | |
| 182 /* Remove reference to this face from its family. If the resulting family | |
| 183 is empty (has no faces), return that family, otherwise return NULL | |
| 184 */ | |
| 185 static FamilyRec* remove_from_family(const SkTypeface* face) { | |
| 186 FamilyRec* family = find_family(face); | |
| 187 if (family) { | |
| 188 SkASSERT(family->fFaces[face->style()] == face); | |
| 189 family->fFaces[face->style()] = NULL; | |
| 190 | |
| 191 for (int i = 0; i < 4; i++) { | |
| 192 if (family->fFaces[i] != NULL) { // family is non-empty | |
| 193 return NULL; | |
| 194 } | |
| 195 } | |
| 196 } else { | |
| 197 // SkDebugf("remove_from_family(%p) face not found", face); | |
| 198 } | |
| 199 return family; // return the empty family | |
| 200 } | |
| 201 | |
| 202 // maybe we should make FamilyRec be doubly-linked | |
| 203 static void detach_and_delete_family(FamilyRec* family) { | |
| 204 FamilyRec* curr = gFamilyHead; | |
| 205 FamilyRec* prev = NULL; | |
| 206 | |
| 207 while (curr != NULL) { | |
| 208 FamilyRec* next = curr->fNext; | |
| 209 if (curr == family) { | |
| 210 if (prev == NULL) { | |
| 211 gFamilyHead = next; | |
| 212 } else { | |
| 213 prev->fNext = next; | |
| 214 } | |
| 215 SkDELETE(family); | |
| 216 return; | |
| 217 } | |
| 218 prev = curr; | |
| 219 curr = next; | |
| 220 } | |
| 221 SkASSERT(!"Yikes, couldn't find family in our list to remove/delete"); | |
| 222 } | |
| 223 | |
| 224 // gFamilyHeadAndNameListMutex must already be acquired | |
| 225 static SkTypeface* find_typeface(const char name[], SkTypeface::Style style) { | |
| 226 NameFamilyPairList& namelist = GetNameList(); | |
| 227 NameFamilyPair* list = namelist.begin(); | |
| 228 int count = namelist.count(); | |
| 229 | |
| 230 int index = SkStrLCSearch(&list[0].fName, count, name, sizeof(list[0])); | |
| 231 | |
| 232 if (index >= 0) { | |
| 233 return find_best_face(list[index].fFamily, style); | |
| 234 } | |
| 235 return NULL; | |
| 236 } | |
| 237 | |
| 238 // gFamilyHeadAndNameListMutex must already be acquired | |
| 239 static SkTypeface* find_typeface(const SkTypeface* familyMember, | |
| 240 SkTypeface::Style style) { | |
| 241 const FamilyRec* family = find_family(familyMember); | |
| 242 return family ? find_best_face(family, style) : NULL; | |
| 243 } | |
| 244 | |
| 245 // gFamilyHeadAndNameListMutex must already be acquired | |
| 246 static void add_name(const char name[], FamilyRec* family) { | |
| 247 SkAutoAsciiToLC tolc(name); | |
| 248 name = tolc.lc(); | |
| 249 | |
| 250 NameFamilyPairList& namelist = GetNameList(); | |
| 251 NameFamilyPair* list = namelist.begin(); | |
| 252 int count = namelist.count(); | |
| 253 | |
| 254 int index = SkStrLCSearch(&list[0].fName, count, name, sizeof(list[0])); | |
| 255 | |
| 256 if (index < 0) { | |
| 257 list = namelist.insert(~index); | |
| 258 list->construct(name, family); | |
| 259 } | |
| 260 } | |
| 261 | |
| 262 // gFamilyHeadAndNameListMutex must already be acquired | |
| 263 static void remove_from_names(FamilyRec* emptyFamily) { | |
| 264 #ifdef SK_DEBUG | |
| 265 for (int i = 0; i < 4; i++) { | |
| 266 SkASSERT(emptyFamily->fFaces[i] == NULL); | |
| 267 } | |
| 268 #endif | |
| 269 | |
| 270 SkTDArray<NameFamilyPair>& list = GetNameList(); | |
| 271 | |
| 272 // must go backwards when removing | |
| 273 for (int i = list.count() - 1; i >= 0; --i) { | |
| 274 NameFamilyPair* pair = &list[i]; | |
| 275 if (pair->fFamily == emptyFamily) { | |
| 276 pair->destruct(); | |
| 277 list.remove(i); | |
| 278 } | |
| 279 } | |
| 280 } | |
| 281 | |
| 282 /////////////////////////////////////////////////////////////////////////////// | |
| 283 | |
| 284 class FamilyTypeface : public SkTypeface_FreeType { | |
| 285 public: | |
| 286 FamilyTypeface(Style style, bool sysFont, SkTypeface* familyMember, | |
| 287 bool isFixedPitch) | |
| 288 : INHERITED(style, sk_atomic_inc(&gUniqueFontID) + 1, isFixedPitch) { | |
| 289 fIsSysFont = sysFont; | |
| 290 | |
| 291 // our caller has acquired the gFamilyHeadAndNameListMutex so this is sa
fe | |
| 292 FamilyRec* rec = NULL; | |
| 293 if (familyMember) { | |
| 294 rec = find_family(familyMember); | |
| 295 SkASSERT(rec); | |
| 296 } else { | |
| 297 rec = SkNEW(FamilyRec); | |
| 298 } | |
| 299 rec->fFaces[style] = this; | |
| 300 } | |
| 301 | |
| 302 virtual ~FamilyTypeface() { | |
| 303 SkAutoMutexAcquire ac(gFamilyHeadAndNameListMutex); | |
| 304 | |
| 305 // remove us from our family. If the family is now empty, we return | |
| 306 // that and then remove that family from the name list | |
| 307 FamilyRec* family = remove_from_family(this); | |
| 308 if (NULL != family) { | |
| 309 remove_from_names(family); | |
| 310 detach_and_delete_family(family); | |
| 311 } | |
| 312 } | |
| 313 | |
| 314 bool isSysFont() const { return fIsSysFont; } | |
| 315 | |
| 316 virtual const char* getUniqueString() const = 0; | |
| 317 virtual const char* getFilePath() const = 0; | |
| 318 | |
| 319 protected: | |
| 320 virtual void onGetFontDescriptor(SkFontDescriptor*, bool*) const SK_OVERRIDE
; | |
| 321 | |
| 322 private: | |
| 323 bool fIsSysFont; | |
| 324 | |
| 325 typedef SkTypeface_FreeType INHERITED; | |
| 326 }; | |
| 327 | |
| 328 /////////////////////////////////////////////////////////////////////////////// | |
| 329 | |
| 330 class StreamTypeface : public FamilyTypeface { | |
| 331 public: | |
| 332 StreamTypeface(Style style, bool sysFont, SkTypeface* familyMember, | |
| 333 SkStream* stream, bool isFixedPitch) | |
| 334 : INHERITED(style, sysFont, familyMember, isFixedPitch) { | |
| 335 SkASSERT(stream); | |
| 336 stream->ref(); | |
| 337 fStream = stream; | |
| 338 } | |
| 339 virtual ~StreamTypeface() { | |
| 340 fStream->unref(); | |
| 341 } | |
| 342 | |
| 343 virtual const char* getUniqueString() const SK_OVERRIDE { return NULL; } | |
| 344 virtual const char* getFilePath() const SK_OVERRIDE { return NULL; } | |
| 345 | |
| 346 protected: | |
| 347 virtual SkStream* onOpenStream(int* ttcIndex) const SK_OVERRIDE { | |
| 348 *ttcIndex = 0; | |
| 349 // we just ref our existing stream, since the caller will call unref() | |
| 350 // when they are through | |
| 351 fStream->ref(); | |
| 352 // must rewind each time, since the caller assumes a "new" stream | |
| 353 fStream->rewind(); | |
| 354 return fStream; | |
| 355 } | |
| 356 | |
| 357 private: | |
| 358 SkStream* fStream; | |
| 359 | |
| 360 typedef FamilyTypeface INHERITED; | |
| 361 }; | |
| 362 | |
| 363 class FileTypeface : public FamilyTypeface { | |
| 364 public: | |
| 365 FileTypeface(Style style, bool sysFont, SkTypeface* familyMember, | |
| 366 const char path[], bool isFixedPitch) | |
| 367 : INHERITED(style, sysFont, familyMember, isFixedPitch) { | |
| 368 SkString fullpath; | |
| 369 | |
| 370 if (sysFont) { | |
| 371 GetFullPathForSysFonts(&fullpath, path); | |
| 372 path = fullpath.c_str(); | |
| 373 } | |
| 374 fPath.set(path); | |
| 375 } | |
| 376 | |
| 377 virtual const char* getUniqueString() const SK_OVERRIDE { | |
| 378 const char* str = strrchr(fPath.c_str(), '/'); | |
| 379 if (str) { | |
| 380 str += 1; // skip the '/' | |
| 381 } | |
| 382 return str; | |
| 383 } | |
| 384 | |
| 385 virtual const char* getFilePath() const SK_OVERRIDE { | |
| 386 return fPath.c_str(); | |
| 387 } | |
| 388 | |
| 389 protected: | |
| 390 virtual SkStream* onOpenStream(int* ttcIndex) const SK_OVERRIDE { | |
| 391 *ttcIndex = 0; | |
| 392 return SkStream::NewFromFile(fPath.c_str()); | |
| 393 } | |
| 394 | |
| 395 private: | |
| 396 SkString fPath; | |
| 397 | |
| 398 typedef FamilyTypeface INHERITED; | |
| 399 }; | |
| 400 | |
| 401 /////////////////////////////////////////////////////////////////////////////// | |
| 402 /////////////////////////////////////////////////////////////////////////////// | |
| 403 | |
| 404 static bool get_name_and_style(const char path[], SkString* name, | |
| 405 SkTypeface::Style* style, | |
| 406 bool* isFixedPitch, bool isExpected) { | |
| 407 SkString fullpath; | |
| 408 GetFullPathForSysFonts(&fullpath, path); | |
| 409 | |
| 410 SkAutoTUnref<SkStream> stream(SkStream::NewFromFile(fullpath.c_str())); | |
| 411 if (stream.get()) { | |
| 412 return find_name_and_attributes(stream, name, style, isFixedPitch); | |
| 413 } else { | |
| 414 if (isExpected) { | |
| 415 SkDebugf("---- failed to open <%s> as a font", fullpath.c_str()); | |
| 416 } | |
| 417 return false; | |
| 418 } | |
| 419 } | |
| 420 | |
| 421 // used to record our notion of the pre-existing fonts | |
| 422 struct FontInitRec { | |
| 423 const char* fFileName; | |
| 424 const char* const* fNames; // null-terminated list | |
| 425 }; | |
| 426 | |
| 427 // deliberately empty, but we use the address to identify fallback fonts | |
| 428 static const char* gFBNames[] = { NULL }; | |
| 429 | |
| 430 /* Fonts are grouped by family, with the first font in a family having the | |
| 431 list of names (even if that list is empty), and the following members having | |
| 432 null for the list. The names list must be NULL-terminated. | |
| 433 */ | |
| 434 static FontInitRec *gSystemFonts; | |
| 435 static size_t gNumSystemFonts = 0; | |
| 436 | |
| 437 // these globals are assigned (once) by load_system_fonts() | |
| 438 static FamilyRec* gDefaultFamily; | |
| 439 static SkTypeface* gDefaultNormal; | |
| 440 static char** gDefaultNames = NULL; | |
| 441 static uint32_t *gFallbackFonts; | |
| 442 | |
| 443 #if SK_DEBUG_FONTS | |
| 444 static void dump_globals() { | |
| 445 SkDebugf("gDefaultNormal=%p id=%u refCnt=%d", gDefaultNormal, | |
| 446 gDefaultNormal ? gDefaultNormal->uniqueID() : 0, | |
| 447 gDefaultNormal ? gDefaultNormal->getRefCnt() : 0); | |
| 448 | |
| 449 if (gDefaultFamily) { | |
| 450 SkDebugf("gDefaultFamily=%p fFaces={%u,%u,%u,%u} refCnt={%d,%d,%d,%d}", | |
| 451 gDefaultFamily, | |
| 452 gDefaultFamily->fFaces[0] ? gDefaultFamily->fFaces[0]->uniqueID
() : 0, | |
| 453 gDefaultFamily->fFaces[1] ? gDefaultFamily->fFaces[1]->uniqueID
() : 0, | |
| 454 gDefaultFamily->fFaces[2] ? gDefaultFamily->fFaces[2]->uniqueID
() : 0, | |
| 455 gDefaultFamily->fFaces[3] ? gDefaultFamily->fFaces[3]->uniqueID
() : 0, | |
| 456 gDefaultFamily->fFaces[0] ? gDefaultFamily->fFaces[0]->getRefCn
t() : 0, | |
| 457 gDefaultFamily->fFaces[1] ? gDefaultFamily->fFaces[1]->getRefCn
t() : 0, | |
| 458 gDefaultFamily->fFaces[2] ? gDefaultFamily->fFaces[2]->getRefCn
t() : 0, | |
| 459 gDefaultFamily->fFaces[3] ? gDefaultFamily->fFaces[3]->getRefCn
t() : 0); | |
| 460 } else { | |
| 461 SkDebugf("gDefaultFamily=%p", gDefaultFamily); | |
| 462 } | |
| 463 | |
| 464 SkDebugf("gNumSystemFonts=%d gSystemFonts=%p gFallbackFonts=%p", | |
| 465 gNumSystemFonts, gSystemFonts, gFallbackFonts); | |
| 466 | |
| 467 for (size_t i = 0; i < gNumSystemFonts; ++i) { | |
| 468 SkDebugf("gSystemFonts[%d] fileName=%s", i, gSystemFonts[i].fFileName); | |
| 469 size_t namesIndex = 0; | |
| 470 if (gSystemFonts[i].fNames) | |
| 471 for (const char* fontName = gSystemFonts[i].fNames[namesIndex]; | |
| 472 fontName != 0; | |
| 473 fontName = gSystemFonts[i].fNames[++namesIndex]) { | |
| 474 SkDebugf(" name[%u]=%s", namesIndex, fontName); | |
| 475 } | |
| 476 } | |
| 477 | |
| 478 if (gFamilyHead) { | |
| 479 FamilyRec* rec = gFamilyHead; | |
| 480 int i=0; | |
| 481 while (rec) { | |
| 482 SkDebugf("gFamilyHead[%d]=%p fFaces={%u,%u,%u,%u} refCnt={%d,%d,%d,%
d}", | |
| 483 i++, rec, | |
| 484 rec->fFaces[0] ? rec->fFaces[0]->uniqueID() : 0, | |
| 485 rec->fFaces[1] ? rec->fFaces[1]->uniqueID() : 0, | |
| 486 rec->fFaces[2] ? rec->fFaces[2]->uniqueID() : 0, | |
| 487 rec->fFaces[3] ? rec->fFaces[3]->uniqueID() : 0, | |
| 488 rec->fFaces[0] ? rec->fFaces[0]->getRefCnt() : 0, | |
| 489 rec->fFaces[1] ? rec->fFaces[1]->getRefCnt() : 0, | |
| 490 rec->fFaces[2] ? rec->fFaces[2]->getRefCnt() : 0, | |
| 491 rec->fFaces[3] ? rec->fFaces[3]->getRefCnt() : 0); | |
| 492 rec = rec->fNext; | |
| 493 } | |
| 494 } else { | |
| 495 SkDebugf("gFamilyHead=%p", gFamilyHead); | |
| 496 } | |
| 497 | |
| 498 } | |
| 499 #endif | |
| 500 | |
| 501 | |
| 502 /* Load info from a configuration file that populates the system/fallback font
structures | |
| 503 */ | |
| 504 static void load_font_info() { | |
| 505 SkTDArray<FontFamily*> fontFamilies; | |
| 506 if (gTestMainConfigFile) { | |
| 507 getTestFontFamilies(fontFamilies, gTestMainConfigFile, gTestFallbackConf
igFile); | |
| 508 } else { | |
| 509 getFontFamilies(fontFamilies); | |
| 510 } | |
| 511 | |
| 512 SkTDArray<FontInitRec> fontInfo; | |
| 513 for (int i = 0; i < fontFamilies.count(); ++i) { | |
| 514 FontFamily *family = fontFamilies[i]; | |
| 515 for (int j = 0; j < family->fFileNames.count(); ++j) { | |
| 516 FontInitRec fontInfoRecord; | |
| 517 fontInfoRecord.fFileName = family->fFileNames[j]; | |
| 518 if (j == 0) { | |
| 519 if (family->fNames.count() == 0) { | |
| 520 // Fallback font | |
| 521 fontInfoRecord.fNames = (char **)gFBNames; | |
| 522 } else { | |
| 523 SkTDArray<const char*> names = family->fNames; | |
| 524 const char **nameList = (const char**) | |
| 525 malloc((names.count() + 1) * sizeof(char*)); | |
| 526 if (nameList == NULL) { | |
| 527 // shouldn't get here | |
| 528 SkDEBUGFAIL("Failed to allocate nameList"); | |
| 529 break; | |
| 530 } | |
| 531 if (gDefaultNames == NULL) { | |
| 532 gDefaultNames = (char**) nameList; | |
| 533 } | |
| 534 for (int i = 0; i < names.count(); ++i) { | |
| 535 nameList[i] = names[i]; | |
| 536 } | |
| 537 nameList[names.count()] = NULL; | |
| 538 fontInfoRecord.fNames = nameList; | |
| 539 } | |
| 540 } else { | |
| 541 fontInfoRecord.fNames = NULL; | |
| 542 } | |
| 543 *fontInfo.append() = fontInfoRecord; | |
| 544 } | |
| 545 } | |
| 546 gNumSystemFonts = fontInfo.count(); | |
| 547 gSystemFonts = (FontInitRec*) malloc(gNumSystemFonts * sizeof(FontInitRec)); | |
| 548 gFallbackFonts = (uint32_t*) malloc((gNumSystemFonts + 1) * sizeof(uint32_t)
); | |
| 549 if (gSystemFonts == NULL) { | |
| 550 // shouldn't get here | |
| 551 SkDEBUGFAIL("No system fonts were found"); | |
| 552 gNumSystemFonts = 0; | |
| 553 } | |
| 554 | |
| 555 #if SK_DEBUG_FONTS | |
| 556 SkDebugf("---- We have %d system fonts", gNumSystemFonts); | |
| 557 #endif | |
| 558 for (size_t i = 0; i < gNumSystemFonts; ++i) { | |
| 559 gSystemFonts[i].fFileName = fontInfo[i].fFileName; | |
| 560 gSystemFonts[i].fNames = fontInfo[i].fNames; | |
| 561 #if SK_DEBUG_FONTS | |
| 562 SkDebugf("---- gSystemFonts[%d] fileName=%s", i, fontInfo[i].fFileName); | |
| 563 #endif | |
| 564 } | |
| 565 fontFamilies.deleteAll(); | |
| 566 } | |
| 567 | |
| 568 /* | |
| 569 * Called once (ensured by the sentinel check at the beginning of our body). | |
| 570 * Initializes all the globals, and register the system fonts. | |
| 571 * | |
| 572 * gFamilyHeadAndNameListMutex must already be acquired. | |
| 573 */ | |
| 574 static void init_system_fonts() { | |
| 575 // check if we've already been called | |
| 576 if (gDefaultNormal) { | |
| 577 return; | |
| 578 } | |
| 579 | |
| 580 SkASSERT(gUniqueFontID == 0); | |
| 581 | |
| 582 load_font_info(); | |
| 583 | |
| 584 FontInitRec* rec = gSystemFonts; | |
| 585 SkTypeface* firstInFamily = NULL; | |
| 586 int fallbackCount = 0; | |
| 587 | |
| 588 for (size_t i = 0; i < gNumSystemFonts; i++) { | |
| 589 // if we're the first in a new family, clear firstInFamily | |
| 590 if (rec[i].fNames != NULL) { | |
| 591 firstInFamily = NULL; | |
| 592 } | |
| 593 | |
| 594 bool isFixedPitch; | |
| 595 SkString name; | |
| 596 SkTypeface::Style style; | |
| 597 | |
| 598 // we expect all the fonts, except the "fallback" fonts | |
| 599 bool isExpected = (rec[i].fNames != gFBNames); | |
| 600 if (!get_name_and_style(rec[i].fFileName, &name, &style, | |
| 601 &isFixedPitch, isExpected)) { | |
| 602 // We need to increase gUniqueFontID here so that the unique id of | |
| 603 // each font matches its index in gSystemFonts array, as expected | |
| 604 // by find_uniqueID. | |
| 605 sk_atomic_inc(&gUniqueFontID); | |
| 606 continue; | |
| 607 } | |
| 608 | |
| 609 SkTypeface* tf = SkNEW_ARGS(FileTypeface, | |
| 610 (style, | |
| 611 true, // system-font (cannot delete) | |
| 612 firstInFamily, // what family to join | |
| 613 rec[i].fFileName, | |
| 614 isFixedPitch) // filename | |
| 615 ); | |
| 616 #if SK_DEBUG_FONTS | |
| 617 SkDebugf("---- SkTypeface[%d] %s fontID %d", | |
| 618 i, rec[i].fFileName, tf->uniqueID()); | |
| 619 #endif | |
| 620 | |
| 621 if (rec[i].fNames != NULL) { | |
| 622 // see if this is one of our fallback fonts | |
| 623 if (rec[i].fNames == gFBNames) { | |
| 624 #if SK_DEBUG_FONTS | |
| 625 SkDebugf("---- adding %s as fallback[%d] fontID %d", | |
| 626 rec[i].fFileName, fallbackCount, tf->uniqueID()); | |
| 627 #endif | |
| 628 gFallbackFonts[fallbackCount++] = tf->uniqueID(); | |
| 629 | |
| 630 // Use the font file name as the name of the typeface. | |
| 631 const char **nameList = (const char**)malloc(2 * sizeof(char*)); | |
| 632 if (nameList == NULL) { | |
| 633 // shouldn't get here | |
| 634 SkDEBUGFAIL("Failed to allocate nameList"); | |
| 635 break; | |
| 636 } | |
| 637 nameList[0] = rec[i].fFileName; | |
| 638 nameList[1] = NULL; | |
| 639 rec[i].fNames = nameList; | |
| 640 } | |
| 641 | |
| 642 firstInFamily = tf; | |
| 643 FamilyRec* family = find_family(tf); | |
| 644 const char* const* names = rec[i].fNames; | |
| 645 | |
| 646 // record the default family if this is it | |
| 647 if (names == gDefaultNames) { | |
| 648 gDefaultFamily = family; | |
| 649 } | |
| 650 // add the names to map to this family | |
| 651 while (*names) { | |
| 652 add_name(*names, family); | |
| 653 names += 1; | |
| 654 } | |
| 655 } | |
| 656 } | |
| 657 | |
| 658 // do this after all fonts are loaded. This is our default font, and it | |
| 659 // acts as a sentinel so we only execute load_system_fonts() once | |
| 660 gDefaultNormal = find_best_face(gDefaultFamily, SkTypeface::kNormal); | |
| 661 // now terminate our fallback list with the sentinel value | |
| 662 gFallbackFonts[fallbackCount] = 0; | |
| 663 | |
| 664 #if SK_DEBUG_FONTS | |
| 665 SkDEBUGCODE(dump_globals()); | |
| 666 #endif | |
| 667 } | |
| 668 | |
| 669 static size_t find_uniqueID(const char* filename) { | |
| 670 // uniqueID is the index, offset by one, of the associated element in | |
| 671 // gSystemFonts[] (assumes system fonts are loaded before external fonts) | |
| 672 // return 0 if not found | |
| 673 const FontInitRec* rec = gSystemFonts; | |
| 674 for (size_t i = 0; i < gNumSystemFonts; i++) { | |
| 675 if (strcmp(rec[i].fFileName, filename) == 0) { | |
| 676 return i+1; | |
| 677 } | |
| 678 } | |
| 679 return 0; | |
| 680 } | |
| 681 | |
| 682 static void reload_fallback_fonts() { | |
| 683 if (gTestFallbackConfigFile) { | |
| 684 // No need to reload fallback fonts in test environment. | |
| 685 return; | |
| 686 } | |
| 687 | |
| 688 SkGraphics::PurgeFontCache(); | |
| 689 | |
| 690 SkTDArray<FontFamily*> fallbackFamilies; | |
| 691 getFallbackFontFamilies(fallbackFamilies); | |
| 692 | |
| 693 int fallbackCount = 0; | |
| 694 for (int i = 0; i < fallbackFamilies.count(); ++i) { | |
| 695 FontFamily *family = fallbackFamilies[i]; | |
| 696 | |
| 697 for (int j = 0; j < family->fFileNames.count(); ++j) { | |
| 698 if (family->fFileNames[j]) { | |
| 699 | |
| 700 // ensure the fallback font exists before adding it to the list | |
| 701 bool isFixedPitch; | |
| 702 SkString name; | |
| 703 SkTypeface::Style style; | |
| 704 if (!get_name_and_style(family->fFileNames[j], &name, &style, | |
| 705 &isFixedPitch, false)) { | |
| 706 continue; | |
| 707 } | |
| 708 | |
| 709 size_t uniqueID = find_uniqueID(family->fFileNames[j]); | |
| 710 SkASSERT(uniqueID != 0); | |
| 711 #if SK_DEBUG_FONTS | |
| 712 SkDebugf("---- reload %s as fallback[%d] fontID %d oldFontID %d"
, | |
| 713 family->fFileNames[j], fallbackCount, uniqueID, | |
| 714 gFallbackFonts[fallbackCount]); | |
| 715 #endif | |
| 716 gFallbackFonts[fallbackCount++] = uniqueID; | |
| 717 break; // The fallback set contains only the first font of each
family | |
| 718 } | |
| 719 } | |
| 720 } | |
| 721 // reset the sentinel the end of the newly ordered array | |
| 722 gFallbackFonts[fallbackCount] = 0; | |
| 723 } | |
| 724 | |
| 725 static void load_system_fonts() { | |
| 726 static AndroidLocale prevLocale; | |
| 727 AndroidLocale locale; | |
| 728 | |
| 729 getLocale(locale); | |
| 730 | |
| 731 if (!gDefaultNormal) { | |
| 732 prevLocale = locale; | |
| 733 init_system_fonts(); | |
| 734 } else if (strncmp(locale.language, prevLocale.language, 2) || | |
| 735 strncmp(locale.region, prevLocale.region, 2)) { | |
| 736 prevLocale = locale; | |
| 737 reload_fallback_fonts(); | |
| 738 } | |
| 739 } | |
| 740 | |
| 741 /////////////////////////////////////////////////////////////////////////////// | |
| 742 | |
| 743 void FamilyTypeface::onGetFontDescriptor(SkFontDescriptor* desc, | |
| 744 bool* isLocalStream) const { | |
| 745 { | |
| 746 SkAutoMutexAcquire ac(gFamilyHeadAndNameListMutex); | |
| 747 desc->setFamilyName(find_family_name(this)); | |
| 748 desc->setFontFileName(this->getUniqueString()); | |
| 749 } | |
| 750 *isLocalStream = !this->isSysFont(); | |
| 751 } | |
| 752 | |
| 753 #if 0 // do we need this different name lookup for Deserialize? | |
| 754 SkTypeface* SkFontHost::Deserialize(SkStream* stream) { | |
| 755 ... | |
| 756 if (NULL != fontFileName && 0 != *fontFileName) { | |
| 757 const FontInitRec* rec = gSystemFonts; | |
| 758 for (size_t i = 0; i < gNumSystemFonts; i++) { | |
| 759 if (strcmp(rec[i].fFileName, fontFileName) == 0) { | |
| 760 // backup until we hit the fNames | |
| 761 for (int j = i; j >= 0; --j) { | |
| 762 if (rec[j].fNames != NULL) { | |
| 763 return SkFontHost::CreateTypeface(NULL, | |
| 764 rec[j].fNames[0], style); | |
| 765 } | |
| 766 } | |
| 767 } | |
| 768 } | |
| 769 } | |
| 770 ... | |
| 771 } | |
| 772 #endif | |
| 773 | |
| 774 /////////////////////////////////////////////////////////////////////////////// | |
| 775 | |
| 776 SkTypeface* SkFontHost::CreateTypeface(const SkTypeface* familyFace, | |
| 777 const char familyName[], | |
| 778 SkTypeface::Style style) { | |
| 779 SkAutoMutexAcquire ac(gFamilyHeadAndNameListMutex); | |
| 780 | |
| 781 load_system_fonts(); | |
| 782 | |
| 783 // clip to legal style bits | |
| 784 style = (SkTypeface::Style)(style & SkTypeface::kBoldItalic); | |
| 785 | |
| 786 SkTypeface* tf = NULL; | |
| 787 | |
| 788 if (NULL != familyFace) { | |
| 789 tf = find_typeface(familyFace, style); | |
| 790 } else if (NULL != familyName) { | |
| 791 // SkDebugf("======= familyName <%s>\n", familyName); | |
| 792 tf = find_typeface(familyName, style); | |
| 793 } | |
| 794 | |
| 795 if (NULL == tf) { | |
| 796 tf = find_best_face(gDefaultFamily, style); | |
| 797 } | |
| 798 | |
| 799 // we ref(), since the semantic is to return a new instance | |
| 800 tf->ref(); | |
| 801 return tf; | |
| 802 } | |
| 803 | |
| 804 SkTypeface* SkAndroidNextLogicalTypeface(SkFontID currFontID, SkFontID origFontI
D, | |
| 805 const SkPaintOptionsAndroid& options) { | |
| 806 // Skia does not support font fallback by default for ndk applications. This | |
| 807 // enables clients such as WebKit to customize their font selection. In any | |
| 808 // case clients can use GetFallbackFamilyNameForChar() to get the fallback | |
| 809 // font for individual characters. | |
| 810 if (!options.isUsingFontFallbacks()) { | |
| 811 return NULL; | |
| 812 } | |
| 813 | |
| 814 SkAutoMutexAcquire ac(gFamilyHeadAndNameListMutex); | |
| 815 | |
| 816 load_system_fonts(); | |
| 817 | |
| 818 const SkTypeface* origTypeface = find_from_uniqueID(origFontID); | |
| 819 const SkTypeface* currTypeface = find_from_uniqueID(currFontID); | |
| 820 | |
| 821 SkASSERT(origTypeface != 0); | |
| 822 SkASSERT(currTypeface != 0); | |
| 823 SkASSERT(gFallbackFonts); | |
| 824 | |
| 825 // Our fallback list always stores the id of the plain in each fallback | |
| 826 // family, so we transform currFontID to its plain equivalent. | |
| 827 currFontID = find_typeface(currTypeface, SkTypeface::kNormal)->uniqueID(); | |
| 828 | |
| 829 /* First see if fontID is already one of our fallbacks. If so, return | |
| 830 its successor. If fontID is not in our list, then return the first one | |
| 831 in our list. Note: list is zero-terminated, and returning zero means | |
| 832 we have no more fonts to use for fallbacks. | |
| 833 */ | |
| 834 const uint32_t* list = gFallbackFonts; | |
| 835 for (int i = 0; list[i] != 0; i++) { | |
| 836 if (list[i] == currFontID) { | |
| 837 if (list[i+1] == 0) | |
| 838 return NULL; | |
| 839 const SkTypeface* nextTypeface = find_from_uniqueID(list[i+1]); | |
| 840 return SkRef(find_typeface(nextTypeface, origTypeface->style())); | |
| 841 } | |
| 842 } | |
| 843 | |
| 844 // If we get here, currFontID was not a fallback, so we start at the | |
| 845 // beginning of our list. Assuming there is at least one fallback font, | |
| 846 // i.e. gFallbackFonts[0] != 0. | |
| 847 const SkTypeface* firstTypeface = find_from_uniqueID(list[0]); | |
| 848 return SkRef(find_typeface(firstTypeface, origTypeface->style())); | |
| 849 } | |
| 850 | |
| 851 /////////////////////////////////////////////////////////////////////////////// | |
| 852 | |
| 853 SkTypeface* SkFontHost::CreateTypefaceFromStream(SkStream* stream) { | |
| 854 if (NULL == stream || stream->getLength() <= 0) { | |
| 855 return NULL; | |
| 856 } | |
| 857 | |
| 858 bool isFixedPitch; | |
| 859 SkTypeface::Style style; | |
| 860 | |
| 861 if (find_name_and_attributes(stream, NULL, &style, &isFixedPitch)) { | |
| 862 SkAutoMutexAcquire ac(gFamilyHeadAndNameListMutex); | |
| 863 // Make sure system fonts are loaded to comply with the assumption of | |
| 864 // unique id offset by one in find_uniqueID. | |
| 865 load_system_fonts(); | |
| 866 return SkNEW_ARGS(StreamTypeface, (style, false, NULL, stream, isFixedPi
tch)); | |
| 867 } else { | |
| 868 return NULL; | |
| 869 } | |
| 870 } | |
| 871 | |
| 872 SkTypeface* SkFontHost::CreateTypefaceFromFile(const char path[]) { | |
| 873 SkAutoTUnref<SkStream> stream(SkStream::NewFromFile(path)); | |
| 874 return stream.get() ? SkFontHost::CreateTypefaceFromStream(stream) : NULL; | |
| 875 } | |
| 876 | |
| 877 /////////////////////////////////////////////////////////////////////////////// | |
| 878 // Function from SkTypeface_android.h | |
| 879 /////////////////////////////////////////////////////////////////////////////// | |
| 880 | |
| 881 // this function can't be called if the gFamilyHeadAndNameListMutex is already l
ocked | |
| 882 static bool typefaceContainsChar(SkTypeface* face, SkUnichar uni) { | |
| 883 SkPaint paint; | |
| 884 paint.setTypeface(face); | |
| 885 paint.setTextEncoding(SkPaint::kUTF32_TextEncoding); | |
| 886 | |
| 887 uint16_t glyphID; | |
| 888 paint.textToGlyphs(&uni, sizeof(uni), &glyphID); | |
| 889 return glyphID != 0; | |
| 890 } | |
| 891 | |
| 892 // this function can't be called if the gFamilyHeadAndNameListMutex is already l
ocked | |
| 893 static SkTypeface* findFallbackTypefaceForChar(SkUnichar uni) { | |
| 894 SkASSERT(gFallbackFonts); | |
| 895 const uint32_t* list = gFallbackFonts; | |
| 896 for (int i = 0; list[i] != 0; i++) { | |
| 897 SkTypeface* face; | |
| 898 { | |
| 899 SkAutoMutexAcquire ac(gFamilyHeadAndNameListMutex); | |
| 900 face = find_from_uniqueID(list[i]); | |
| 901 } | |
| 902 if (typefaceContainsChar(face, uni)) { | |
| 903 return face; | |
| 904 } | |
| 905 } | |
| 906 return 0; | |
| 907 } | |
| 908 | |
| 909 bool SkGetFallbackFamilyNameForChar(SkUnichar uni, SkString* name) { | |
| 910 SkASSERT(name); | |
| 911 { | |
| 912 SkAutoMutexAcquire ac(gFamilyHeadAndNameListMutex); | |
| 913 load_system_fonts(); | |
| 914 } | |
| 915 | |
| 916 const SkTypeface* tf = findFallbackTypefaceForChar(uni); | |
| 917 if (!tf) { | |
| 918 return false; | |
| 919 } | |
| 920 SkAutoMutexAcquire ac(gFamilyHeadAndNameListMutex); | |
| 921 name->set(find_family_name(tf)); | |
| 922 return true; | |
| 923 } | |
| 924 | |
| 925 void SkUseTestFontConfigFile(const char* mainconf, const char* fallbackconf, | |
| 926 const char* fontsdir) { | |
| 927 gTestMainConfigFile = mainconf; | |
| 928 gTestFallbackConfigFile = fallbackconf; | |
| 929 gTestFontFilePrefix = fontsdir; | |
| 930 SkASSERT(gTestMainConfigFile); | |
| 931 SkASSERT(gTestFallbackConfigFile); | |
| 932 SkASSERT(gTestFontFilePrefix); | |
| 933 SkDEBUGF(("Use Test Config File Main %s, Fallback %s, Font Dir %s", | |
| 934 gTestMainConfigFile, gTestFallbackConfigFile, gTestFontFilePrefix)
); | |
| 935 } | |
| 936 | |
| 937 /////////////////////////////////////////////////////////////////////////////// | |
| 938 | |
| 939 #include "SkFontMgr.h" | |
| 940 | |
| 941 SkFontMgr* SkFontMgr::Factory() { | |
| 942 // todo | |
| 943 return NULL; | |
| 944 } | |
| OLD | NEW |
|---|
Chromium Code Reviews
Issue 18666003:
Remove old and unused Android font host code (Closed)
Base URL: https://skia.googlecode.com/svn/trunk