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1 /* | 1 /* |
2 * Copyright 2009-2015 Google Inc. | 2 * Copyright 2009-2015 Google Inc. |
3 * | 3 * |
4 * Use of this source code is governed by a BSD-style license that can be | 4 * Use of this source code is governed by a BSD-style license that can be |
5 * found in the LICENSE file. | 5 * found in the LICENSE file. |
6 */ | 6 */ |
7 | 7 |
8 /* migrated from chrome/src/skia/ext/SkFontHost_fontconfig_direct.cpp */ | 8 /* migrated from chrome/src/skia/ext/SkFontHost_fontconfig_direct.cpp */ |
9 | 9 |
10 #include "SkBuffer.h" | 10 #include "SkBuffer.h" |
11 #include "SkDataTable.h" | 11 #include "SkDataTable.h" |
| 12 #include "SkFixed.h" |
12 #include "SkFontConfigInterface_direct.h" | 13 #include "SkFontConfigInterface_direct.h" |
13 #include "SkFontStyle.h" | 14 #include "SkFontStyle.h" |
14 #include "SkMutex.h" | 15 #include "SkMutex.h" |
15 #include "SkStream.h" | 16 #include "SkStream.h" |
16 #include "SkString.h" | 17 #include "SkString.h" |
17 #include "SkTArray.h" | 18 #include "SkTArray.h" |
18 #include "SkTDArray.h" | 19 #include "SkTDArray.h" |
19 #include "SkTemplates.h" | 20 #include "SkTemplates.h" |
20 #include "SkTypeface.h" | 21 #include "SkTypeface.h" |
21 #include "SkTypes.h" | 22 #include "SkTypes.h" |
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297 // tells you whether a given request is for such a fallback. | 298 // tells you whether a given request is for such a fallback. |
298 bool IsFallbackFontAllowed(const SkString& family) { | 299 bool IsFallbackFontAllowed(const SkString& family) { |
299 const char* family_cstr = family.c_str(); | 300 const char* family_cstr = family.c_str(); |
300 return family.isEmpty() || | 301 return family.isEmpty() || |
301 strcasecmp(family_cstr, "sans") == 0 || | 302 strcasecmp(family_cstr, "sans") == 0 || |
302 strcasecmp(family_cstr, "serif") == 0 || | 303 strcasecmp(family_cstr, "serif") == 0 || |
303 strcasecmp(family_cstr, "monospace") == 0; | 304 strcasecmp(family_cstr, "monospace") == 0; |
304 } | 305 } |
305 | 306 |
306 // Retrieves |is_bold|, |is_italic| and |font_family| properties from |font|. | 307 // Retrieves |is_bold|, |is_italic| and |font_family| properties from |font|. |
| 308 #ifdef SK_VERY_LEGACY_CREATE_TYPEFACE |
307 SkTypeface::Style GetFontStyle(FcPattern* font) { | 309 SkTypeface::Style GetFontStyle(FcPattern* font) { |
308 int resulting_bold; | 310 int resulting_bold; |
309 if (FcPatternGetInteger(font, FC_WEIGHT, 0, &resulting_bold)) | 311 if (FcPatternGetInteger(font, FC_WEIGHT, 0, &resulting_bold)) |
310 resulting_bold = FC_WEIGHT_NORMAL; | 312 resulting_bold = FC_WEIGHT_NORMAL; |
311 | 313 |
312 int resulting_italic; | 314 int resulting_italic; |
313 if (FcPatternGetInteger(font, FC_SLANT, 0, &resulting_italic)) | 315 if (FcPatternGetInteger(font, FC_SLANT, 0, &resulting_italic)) |
314 resulting_italic = FC_SLANT_ROMAN; | 316 resulting_italic = FC_SLANT_ROMAN; |
315 | 317 |
316 // If we ask for an italic font, fontconfig might take a roman font and set | 318 // If we ask for an italic font, fontconfig might take a roman font and set |
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328 int styleBits = 0; | 330 int styleBits = 0; |
329 if (resulting_bold > FC_WEIGHT_MEDIUM && !have_embolden) { | 331 if (resulting_bold > FC_WEIGHT_MEDIUM && !have_embolden) { |
330 styleBits |= SkTypeface::kBold; | 332 styleBits |= SkTypeface::kBold; |
331 } | 333 } |
332 if (resulting_italic > FC_SLANT_ROMAN && !have_matrix) { | 334 if (resulting_italic > FC_SLANT_ROMAN && !have_matrix) { |
333 styleBits |= SkTypeface::kItalic; | 335 styleBits |= SkTypeface::kItalic; |
334 } | 336 } |
335 | 337 |
336 return (SkTypeface::Style)styleBits; | 338 return (SkTypeface::Style)styleBits; |
337 } | 339 } |
| 340 #else |
| 341 |
| 342 static int get_int(FcPattern* pattern, const char object[], int missing) { |
| 343 int value; |
| 344 if (FcPatternGetInteger(pattern, object, 0, &value) != FcResultMatch) { |
| 345 return missing; |
| 346 } |
| 347 return value; |
| 348 } |
| 349 |
| 350 static int map_range(SkFixed value, |
| 351 SkFixed old_min, SkFixed old_max, |
| 352 SkFixed new_min, SkFixed new_max) |
| 353 { |
| 354 SkASSERT(old_min < old_max); |
| 355 SkASSERT(new_min <= new_max); |
| 356 return new_min + SkMulDiv(value - old_min, new_max - new_min, old_max - old_
min); |
| 357 } |
| 358 |
| 359 struct MapRanges { |
| 360 SkFixed old_val; |
| 361 SkFixed new_val; |
| 362 }; |
| 363 |
| 364 static SkFixed map_ranges_fixed(SkFixed val, MapRanges const ranges[], int range
sCount) { |
| 365 // -Inf to [0] |
| 366 if (val < ranges[0].old_val) { |
| 367 return ranges[0].new_val; |
| 368 } |
| 369 |
| 370 // Linear from [i] to [i+1] |
| 371 for (int i = 0; i < rangesCount - 1; ++i) { |
| 372 if (val < ranges[i+1].old_val) { |
| 373 return map_range(val, ranges[i].old_val, ranges[i+1].old_val, |
| 374 ranges[i].new_val, ranges[i+1].new_val); |
| 375 } |
| 376 } |
| 377 |
| 378 // From [n] to +Inf |
| 379 // if (fcweight < Inf) |
| 380 return ranges[rangesCount-1].new_val; |
| 381 } |
| 382 |
| 383 static int map_ranges(int val, MapRanges const ranges[], int rangesCount) { |
| 384 return SkFixedRoundToInt(map_ranges_fixed(SkIntToFixed(val), ranges, rangesC
ount)); |
| 385 } |
| 386 |
| 387 template<int n> struct SkTFixed { |
| 388 static_assert(-32768 <= n && n <= 32767, "SkTFixed_n_not_in_range"); |
| 389 static const SkFixed value = static_cast<SkFixed>(n << 16); |
| 390 }; |
| 391 |
| 392 static SkFontStyle skfontstyle_from_fcpattern(FcPattern* pattern) { |
| 393 typedef SkFontStyle SkFS; |
| 394 |
| 395 static const MapRanges weightRanges[] = { |
| 396 { SkTFixed<FC_WEIGHT_THIN>::value, SkTFixed<SkFS::kThin_Weight>::v
alue }, |
| 397 { SkTFixed<FC_WEIGHT_EXTRALIGHT>::value, SkTFixed<SkFS::kExtraLight_Weig
ht>::value }, |
| 398 { SkTFixed<FC_WEIGHT_LIGHT>::value, SkTFixed<SkFS::kLight_Weight>::
value }, |
| 399 { SkTFixed<FC_WEIGHT_REGULAR>::value, SkTFixed<SkFS::kNormal_Weight>:
:value }, |
| 400 { SkTFixed<FC_WEIGHT_MEDIUM>::value, SkTFixed<SkFS::kMedium_Weight>:
:value }, |
| 401 { SkTFixed<FC_WEIGHT_DEMIBOLD>::value, SkTFixed<SkFS::kSemiBold_Weight
>::value }, |
| 402 { SkTFixed<FC_WEIGHT_BOLD>::value, SkTFixed<SkFS::kBold_Weight>::v
alue }, |
| 403 { SkTFixed<FC_WEIGHT_EXTRABOLD>::value, SkTFixed<SkFS::kExtraBold_Weigh
t>::value }, |
| 404 { SkTFixed<FC_WEIGHT_BLACK>::value, SkTFixed<SkFS::kBlack_Weight>::
value }, |
| 405 { SkTFixed<FC_WEIGHT_EXTRABLACK>::value, SkTFixed<1000>::value }, |
| 406 }; |
| 407 int weight = map_ranges(get_int(pattern, FC_WEIGHT, FC_WEIGHT_REGULAR), |
| 408 weightRanges, SK_ARRAY_COUNT(weightRanges)); |
| 409 |
| 410 static const MapRanges widthRanges[] = { |
| 411 { SkTFixed<FC_WIDTH_ULTRACONDENSED>::value, SkTFixed<SkFS::kUltraCondens
ed_Width>::value }, |
| 412 { SkTFixed<FC_WIDTH_EXTRACONDENSED>::value, SkTFixed<SkFS::kExtraCondens
ed_Width>::value }, |
| 413 { SkTFixed<FC_WIDTH_CONDENSED>::value, SkTFixed<SkFS::kCondensed_Wi
dth>::value }, |
| 414 { SkTFixed<FC_WIDTH_SEMICONDENSED>::value, SkTFixed<SkFS::kSemiCondense
d_Width>::value }, |
| 415 { SkTFixed<FC_WIDTH_NORMAL>::value, SkTFixed<SkFS::kNormal_Width
>::value }, |
| 416 { SkTFixed<FC_WIDTH_SEMIEXPANDED>::value, SkTFixed<SkFS::kSemiExpanded
_Width>::value }, |
| 417 { SkTFixed<FC_WIDTH_EXPANDED>::value, SkTFixed<SkFS::kExpanded_Wid
th>::value }, |
| 418 { SkTFixed<FC_WIDTH_EXTRAEXPANDED>::value, SkTFixed<SkFS::kExtraExpande
d_Width>::value }, |
| 419 { SkTFixed<FC_WIDTH_ULTRAEXPANDED>::value, SkTFixed<SkFS::kUltaExpanded
_Width>::value }, |
| 420 }; |
| 421 int width = map_ranges(get_int(pattern, FC_WIDTH, FC_WIDTH_NORMAL), |
| 422 widthRanges, SK_ARRAY_COUNT(widthRanges)); |
| 423 |
| 424 SkFS::Slant slant = get_int(pattern, FC_SLANT, FC_SLANT_ROMAN) > 0 |
| 425 ? SkFS::kItalic_Slant |
| 426 : SkFS::kUpright_Slant; |
| 427 |
| 428 return SkFontStyle(weight, width, slant); |
| 429 } |
| 430 |
| 431 static void fcpattern_from_skfontstyle(SkFontStyle style, FcPattern* pattern) { |
| 432 typedef SkFontStyle SkFS; |
| 433 |
| 434 static const MapRanges weightRanges[] = { |
| 435 { SkTFixed<SkFS::kThin_Weight>::value, SkTFixed<FC_WEIGHT_THIN>::v
alue }, |
| 436 { SkTFixed<SkFS::kExtraLight_Weight>::value, SkTFixed<FC_WEIGHT_EXTRALIG
HT>::value }, |
| 437 { SkTFixed<SkFS::kLight_Weight>::value, SkTFixed<FC_WEIGHT_LIGHT>::
value }, |
| 438 { SkTFixed<SkFS::kNormal_Weight>::value, SkTFixed<FC_WEIGHT_REGULAR>
::value }, |
| 439 { SkTFixed<SkFS::kMedium_Weight>::value, SkTFixed<FC_WEIGHT_MEDIUM>:
:value }, |
| 440 { SkTFixed<SkFS::kSemiBold_Weight>::value, SkTFixed<FC_WEIGHT_DEMIBOLD
>::value }, |
| 441 { SkTFixed<SkFS::kBold_Weight>::value, SkTFixed<FC_WEIGHT_BOLD>::v
alue }, |
| 442 { SkTFixed<SkFS::kExtraBold_Weight>::value, SkTFixed<FC_WEIGHT_EXTRABOL
D>::value }, |
| 443 { SkTFixed<SkFS::kBlack_Weight>::value, SkTFixed<FC_WEIGHT_BLACK>::
value }, |
| 444 { SkTFixed<1000>::value, SkTFixed<FC_WEIGHT_EXTRABLA
CK>::value }, |
| 445 }; |
| 446 int weight = map_ranges(style.weight(), weightRanges, SK_ARRAY_COUNT(weightR
anges)); |
| 447 |
| 448 static const MapRanges widthRanges[] = { |
| 449 { SkTFixed<SkFS::kUltraCondensed_Width>::value, SkTFixed<FC_WIDTH_ULTRAC
ONDENSED>::value }, |
| 450 { SkTFixed<SkFS::kExtraCondensed_Width>::value, SkTFixed<FC_WIDTH_EXTRAC
ONDENSED>::value }, |
| 451 { SkTFixed<SkFS::kCondensed_Width>::value, SkTFixed<FC_WIDTH_CONDEN
SED>::value }, |
| 452 { SkTFixed<SkFS::kSemiCondensed_Width>::value, SkTFixed<FC_WIDTH_SEMICO
NDENSED>::value }, |
| 453 { SkTFixed<SkFS::kNormal_Width>::value, SkTFixed<FC_WIDTH_NORMAL
>::value }, |
| 454 { SkTFixed<SkFS::kSemiExpanded_Width>::value, SkTFixed<FC_WIDTH_SEMIEX
PANDED>::value }, |
| 455 { SkTFixed<SkFS::kExpanded_Width>::value, SkTFixed<FC_WIDTH_EXPAND
ED>::value }, |
| 456 { SkTFixed<SkFS::kExtraExpanded_Width>::value, SkTFixed<FC_WIDTH_EXTRAE
XPANDED>::value }, |
| 457 { SkTFixed<SkFS::kUltaExpanded_Width>::value, SkTFixed<FC_WIDTH_ULTRAE
XPANDED>::value }, |
| 458 }; |
| 459 int width = map_ranges(style.width(), widthRanges, SK_ARRAY_COUNT(widthRange
s)); |
| 460 |
| 461 FcPatternAddInteger(pattern, FC_WEIGHT, weight); |
| 462 FcPatternAddInteger(pattern, FC_WIDTH, width); |
| 463 FcPatternAddInteger(pattern, FC_SLANT, style.isItalic() ? FC_SLANT_ITALIC :
FC_SLANT_ROMAN); |
| 464 } |
| 465 |
| 466 SkFontStyle GetFontStyle(FcPattern* font) { |
| 467 return skfontstyle_from_fcpattern(font); |
| 468 } |
| 469 #endif |
338 | 470 |
339 } // anonymous namespace | 471 } // anonymous namespace |
340 | 472 |
341 /////////////////////////////////////////////////////////////////////////////// | 473 /////////////////////////////////////////////////////////////////////////////// |
342 | 474 |
343 #define kMaxFontFamilyLength 2048 | 475 #define kMaxFontFamilyLength 2048 |
344 | 476 |
345 SkFontConfigInterfaceDirect::SkFontConfigInterfaceDirect() { | 477 SkFontConfigInterfaceDirect::SkFontConfigInterfaceDirect() { |
346 SkAutoMutexAcquire ac(mutex_); | 478 SkAutoMutexAcquire ac(mutex_); |
347 | 479 |
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410 if (acceptable_substitute) | 542 if (acceptable_substitute) |
411 break; | 543 break; |
412 } | 544 } |
413 if (!acceptable_substitute) | 545 if (!acceptable_substitute) |
414 return nullptr; | 546 return nullptr; |
415 } | 547 } |
416 | 548 |
417 return match; | 549 return match; |
418 } | 550 } |
419 | 551 |
| 552 #ifdef SK_VERY_LEGACY_CREATE_TYPEFACE |
420 bool SkFontConfigInterfaceDirect::matchFamilyName(const char familyName[], | 553 bool SkFontConfigInterfaceDirect::matchFamilyName(const char familyName[], |
421 SkTypeface::Style style, | 554 SkTypeface::Style style, |
422 FontIdentity* outIdentity, | 555 FontIdentity* outIdentity, |
423 SkString* outFamilyName, | 556 SkString* outFamilyName, |
424 SkTypeface::Style* outStyle) { | 557 SkTypeface::Style* outStyle) { |
| 558 #else |
| 559 bool SkFontConfigInterfaceDirect::matchFamilyName(const char familyName[], |
| 560 SkFontStyle style, |
| 561 FontIdentity* outIdentity, |
| 562 SkString* outFamilyName, |
| 563 SkFontStyle* outStyle) { |
| 564 #endif |
425 SkString familyStr(familyName ? familyName : ""); | 565 SkString familyStr(familyName ? familyName : ""); |
426 if (familyStr.size() > kMaxFontFamilyLength) { | 566 if (familyStr.size() > kMaxFontFamilyLength) { |
427 return false; | 567 return false; |
428 } | 568 } |
429 | 569 |
430 SkAutoMutexAcquire ac(mutex_); | 570 SkAutoMutexAcquire ac(mutex_); |
431 | 571 |
432 FcPattern* pattern = FcPatternCreate(); | 572 FcPattern* pattern = FcPatternCreate(); |
433 | 573 |
434 if (familyName) { | 574 if (familyName) { |
435 FcPatternAddString(pattern, FC_FAMILY, (FcChar8*)familyName); | 575 FcPatternAddString(pattern, FC_FAMILY, (FcChar8*)familyName); |
436 } | 576 } |
| 577 #ifdef SK_VERY_LEGACY_CREATE_TYPEFACE |
437 FcPatternAddInteger(pattern, FC_WEIGHT, | 578 FcPatternAddInteger(pattern, FC_WEIGHT, |
438 (style & SkTypeface::kBold) ? FC_WEIGHT_BOLD | 579 (style & SkTypeface::kBold) ? FC_WEIGHT_BOLD |
439 : FC_WEIGHT_NORMAL); | 580 : FC_WEIGHT_NORMAL); |
440 FcPatternAddInteger(pattern, FC_SLANT, | 581 FcPatternAddInteger(pattern, FC_SLANT, |
441 (style & SkTypeface::kItalic) ? FC_SLANT_ITALIC | 582 (style & SkTypeface::kItalic) ? FC_SLANT_ITALIC |
442 : FC_SLANT_ROMAN); | 583 : FC_SLANT_ROMAN); |
| 584 #else |
| 585 fcpattern_from_skfontstyle(style, pattern); |
| 586 #endif |
| 587 |
443 FcPatternAddBool(pattern, FC_SCALABLE, FcTrue); | 588 FcPatternAddBool(pattern, FC_SCALABLE, FcTrue); |
444 | 589 |
445 FcConfigSubstitute(nullptr, pattern, FcMatchPattern); | 590 FcConfigSubstitute(nullptr, pattern, FcMatchPattern); |
446 FcDefaultSubstitute(pattern); | 591 FcDefaultSubstitute(pattern); |
447 | 592 |
448 // Font matching: | 593 // Font matching: |
449 // CSS often specifies a fallback list of families: | 594 // CSS often specifies a fallback list of families: |
450 // font-family: a, b, c, serif; | 595 // font-family: a, b, c, serif; |
451 // However, fontconfig will always do its best to find *a* font when asked | 596 // However, fontconfig will always do its best to find *a* font when asked |
452 // for something so we need a way to tell if the match which it has found is | 597 // for something so we need a way to tell if the match which it has found is |
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575 const char* famName = get_name(match, FC_FAMILY); | 720 const char* famName = get_name(match, FC_FAMILY); |
576 if (famName && !find_name(names, famName)) { | 721 if (famName && !find_name(names, famName)) { |
577 *names.append() = famName; | 722 *names.append() = famName; |
578 *sizes.append() = strlen(famName) + 1; | 723 *sizes.append() = strlen(famName) + 1; |
579 } | 724 } |
580 } | 725 } |
581 | 726 |
582 return SkDataTable::NewCopyArrays((const void*const*)names.begin(), | 727 return SkDataTable::NewCopyArrays((const void*const*)names.begin(), |
583 sizes.begin(), names.count()); | 728 sizes.begin(), names.count()); |
584 } | 729 } |
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