bungeman | a6785cc | 2014-08-25 12:00:49 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2014 Google Inc. |
| 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 "SkDataTable.h" |
| 9 | #include "SkFontDescriptor.h" |
| 10 | #include "SkFontHost_FreeType_common.h" |
| 11 | #include "SkFontMgr.h" |
| 12 | #include "SkFontStyle.h" |
| 13 | #include "SkMath.h" |
| 14 | #include "SkString.h" |
| 15 | #include "SkStream.h" |
| 16 | #include "SkTDArray.h" |
| 17 | #include "SkThread.h" |
| 18 | #include "SkTypefaceCache.h" |
| 19 | #include "SkOSFile.h" |
| 20 | |
| 21 | #include <fontconfig/fontconfig.h> |
| 22 | |
| 23 | // FC_POSTSCRIPT_NAME was added with b561ff20 which ended up in 2.10.92 |
| 24 | // Ubuntu 12.04 is on 2.8.0, 13.10 is on 2.10.93 |
| 25 | // Debian 7 is on 2.9.0, 8 is on 2.11 |
| 26 | // OpenSUSE 12.2 is on 2.9.0, 12.3 is on 2.10.2, 13.1 2.11.0 |
| 27 | // Fedora 19 is on 2.10.93 |
| 28 | #ifndef FC_POSTSCRIPT_NAME |
| 29 | # define FC_POSTSCRIPT_NAME "postscriptname" |
| 30 | #endif |
| 31 | |
| 32 | #ifdef SK_DEBUG |
| 33 | # include "SkTLS.h" |
| 34 | #endif |
| 35 | |
| 36 | /** Since FontConfig is poorly documented, this gives a high level overview: |
| 37 | * |
| 38 | * FcConfig is a handle to a FontConfig configuration instance. Each 'configuration' is independent |
| 39 | * from any others which may exist. There exists a default global configuration which is created |
| 40 | * and destroyed by FcInit and FcFini, but this default should not normally be used. |
| 41 | * Instead, one should use FcConfigCreate and FcInit* to have a named local state. |
| 42 | * |
| 43 | * FcPatterns are {objectName -> [element]} (maps from object names to a list of elements). |
| 44 | * Each element is some internal data plus an FcValue which is a variant (a union with a type tag). |
| 45 | * Lists of elements are not typed, except by convention. Any collection of FcValues must be |
| 46 | * assumed to be heterogeneous by the code, but the code need not do anything particularly |
| 47 | * interesting if the values go against convention. |
| 48 | * |
| 49 | * Somewhat like DirectWrite, FontConfig supports synthetics through FC_EMBOLDEN and FC_MATRIX. |
| 50 | * Like all synthetic information, such information must be passed with the font data. |
| 51 | */ |
| 52 | |
| 53 | namespace { |
| 54 | |
| 55 | // Fontconfig is not threadsafe before 2.10.91. Before that, we lock with a global mutex. |
| 56 | // See http://skbug.com/1497 for background. |
| 57 | SK_DECLARE_STATIC_MUTEX(gFCMutex); |
| 58 | |
| 59 | #ifdef SK_DEBUG |
bungeman | f87650c | 2014-08-26 13:47:20 -0700 | [diff] [blame] | 60 | void *CreateThreadFcLocked() { return SkNEW_ARGS(bool, (false)); } |
bungeman | a6785cc | 2014-08-25 12:00:49 -0700 | [diff] [blame] | 61 | void DeleteThreadFcLocked(void* v) { SkDELETE(static_cast<bool*>(v)); } |
| 62 | # define THREAD_FC_LOCKED \ |
| 63 | static_cast<bool*>(SkTLS::Get(CreateThreadFcLocked, DeleteThreadFcLocked)) |
| 64 | #endif |
| 65 | |
| 66 | struct FCLocker { |
| 67 | // Assume FcGetVersion() has always been thread safe. |
| 68 | |
| 69 | FCLocker() { |
| 70 | if (FcGetVersion() < 21091) { |
| 71 | gFCMutex.acquire(); |
| 72 | } else { |
| 73 | SkDEBUGCODE(bool* threadLocked = THREAD_FC_LOCKED); |
| 74 | SkASSERT(false == *threadLocked); |
| 75 | SkDEBUGCODE(*threadLocked = true); |
| 76 | } |
| 77 | } |
| 78 | |
| 79 | ~FCLocker() { |
| 80 | AssertHeld(); |
| 81 | if (FcGetVersion() < 21091) { |
| 82 | gFCMutex.release(); |
| 83 | } else { |
| 84 | SkDEBUGCODE(*THREAD_FC_LOCKED = false); |
| 85 | } |
| 86 | } |
| 87 | |
| 88 | static void AssertHeld() { SkDEBUGCODE( |
| 89 | if (FcGetVersion() < 21091) { |
| 90 | gFCMutex.assertHeld(); |
| 91 | } else { |
| 92 | SkASSERT(true == *THREAD_FC_LOCKED); |
| 93 | } |
| 94 | ) } |
| 95 | }; |
| 96 | |
| 97 | } // namespace |
| 98 | |
bungeman | 6bc2c94 | 2014-09-09 12:50:36 -0700 | [diff] [blame] | 99 | template<typename T, void (*D)(T*)> void FcTDestroy(T* t) { |
bungeman | a6785cc | 2014-08-25 12:00:49 -0700 | [diff] [blame] | 100 | FCLocker::AssertHeld(); |
bungeman | 6bc2c94 | 2014-09-09 12:50:36 -0700 | [diff] [blame] | 101 | D(t); |
bungeman | a6785cc | 2014-08-25 12:00:49 -0700 | [diff] [blame] | 102 | } |
bungeman | 6bc2c94 | 2014-09-09 12:50:36 -0700 | [diff] [blame] | 103 | template <typename T, T* (*C)(), void (*D)(T*)> class SkAutoFc |
| 104 | : public SkAutoTCallVProc<T, FcTDestroy<T, D> > { |
bungeman | a6785cc | 2014-08-25 12:00:49 -0700 | [diff] [blame] | 105 | public: |
bungeman | 6bc2c94 | 2014-09-09 12:50:36 -0700 | [diff] [blame] | 106 | SkAutoFc() : SkAutoTCallVProc<T, FcTDestroy<T, D> >(C()) { |
| 107 | T* obj = this->operator T*(); |
| 108 | SK_ALWAYSBREAK(NULL != obj); |
| 109 | } |
| 110 | explicit SkAutoFc(T* obj) : SkAutoTCallVProc<T, FcTDestroy<T, D> >(obj) {} |
bungeman | a6785cc | 2014-08-25 12:00:49 -0700 | [diff] [blame] | 111 | }; |
| 112 | |
bungeman | 6bc2c94 | 2014-09-09 12:50:36 -0700 | [diff] [blame] | 113 | typedef SkAutoFc<FcCharSet, FcCharSetCreate, FcCharSetDestroy> SkAutoFcCharSet; |
| 114 | typedef SkAutoFc<FcConfig, FcConfigCreate, FcConfigDestroy> SkAutoFcConfig; |
| 115 | typedef SkAutoFc<FcFontSet, FcFontSetCreate, FcFontSetDestroy> SkAutoFcFontSet; |
| 116 | typedef SkAutoFc<FcLangSet, FcLangSetCreate, FcLangSetDestroy> SkAutoFcLangSet; |
| 117 | typedef SkAutoFc<FcObjectSet, FcObjectSetCreate, FcObjectSetDestroy> SkAutoFcObjectSet; |
| 118 | typedef SkAutoFc<FcPattern, FcPatternCreate, FcPatternDestroy> SkAutoFcPattern; |
bungeman | a6785cc | 2014-08-25 12:00:49 -0700 | [diff] [blame] | 119 | |
| 120 | static int get_int(FcPattern* pattern, const char object[], int missing) { |
| 121 | int value; |
| 122 | if (FcPatternGetInteger(pattern, object, 0, &value) != FcResultMatch) { |
| 123 | return missing; |
| 124 | } |
| 125 | return value; |
| 126 | } |
| 127 | |
| 128 | static const char* get_string(FcPattern* pattern, const char object[], const char* missing = "") { |
| 129 | FcChar8* value; |
| 130 | if (FcPatternGetString(pattern, object, 0, &value) != FcResultMatch) { |
| 131 | return missing; |
| 132 | } |
| 133 | return (const char*)value; |
| 134 | } |
| 135 | |
| 136 | enum SkWeakReturn { |
| 137 | kIsWeak_WeakReturn, |
| 138 | kIsStrong_WeakReturn, |
| 139 | kNoId_WeakReturn |
| 140 | }; |
| 141 | /** Ideally there would exist a call like |
| 142 | * FcResult FcPatternIsWeak(pattern, object, id, FcBool* isWeak); |
| 143 | * |
| 144 | * However, there is no such call and as of Fc 2.11.0 even FcPatternEquals ignores the weak bit. |
| 145 | * Currently, the only reliable way of finding the weak bit is by its effect on matching. |
| 146 | * The weak bit only affects the matching of FC_FAMILY and FC_POSTSCRIPT_NAME object values. |
| 147 | * A element with the weak bit is scored after FC_LANG, without the weak bit is scored before. |
| 148 | * Note that the weak bit is stored on the element, not on the value it holds. |
| 149 | */ |
| 150 | static SkWeakReturn is_weak(FcPattern* pattern, const char object[], int id) { |
| 151 | FCLocker::AssertHeld(); |
| 152 | |
| 153 | FcResult result; |
| 154 | |
| 155 | // Create a copy of the pattern with only the value 'pattern'['object'['id']] in it. |
| 156 | // Internally, FontConfig pattern objects are linked lists, so faster to remove from head. |
| 157 | SkAutoFcObjectSet requestedObjectOnly(FcObjectSetBuild(object, NULL)); |
| 158 | SkAutoFcPattern minimal(FcPatternFilter(pattern, requestedObjectOnly)); |
| 159 | FcBool hasId = true; |
| 160 | for (int i = 0; hasId && i < id; ++i) { |
| 161 | hasId = FcPatternRemove(minimal, object, 0); |
| 162 | } |
| 163 | if (!hasId) { |
| 164 | return kNoId_WeakReturn; |
| 165 | } |
| 166 | FcValue value; |
| 167 | result = FcPatternGet(minimal, object, 0, &value); |
| 168 | if (result != FcResultMatch) { |
| 169 | return kNoId_WeakReturn; |
| 170 | } |
| 171 | while (hasId) { |
| 172 | hasId = FcPatternRemove(minimal, object, 1); |
| 173 | } |
| 174 | |
| 175 | // Create a font set with two patterns. |
| 176 | // 1. the same 'object' as minimal and a lang object with only 'nomatchlang'. |
| 177 | // 2. a different 'object' from minimal and a lang object with only 'matchlang'. |
bungeman | 6bc2c94 | 2014-09-09 12:50:36 -0700 | [diff] [blame] | 178 | SkAutoFcFontSet fontSet; |
bungeman | a6785cc | 2014-08-25 12:00:49 -0700 | [diff] [blame] | 179 | |
bungeman | 6bc2c94 | 2014-09-09 12:50:36 -0700 | [diff] [blame] | 180 | SkAutoFcLangSet strongLangSet; |
bungeman | a6785cc | 2014-08-25 12:00:49 -0700 | [diff] [blame] | 181 | FcLangSetAdd(strongLangSet, (const FcChar8*)"nomatchlang"); |
| 182 | SkAutoFcPattern strong(FcPatternDuplicate(minimal)); |
| 183 | FcPatternAddLangSet(strong, FC_LANG, strongLangSet); |
| 184 | |
bungeman | 6bc2c94 | 2014-09-09 12:50:36 -0700 | [diff] [blame] | 185 | SkAutoFcLangSet weakLangSet; |
bungeman | a6785cc | 2014-08-25 12:00:49 -0700 | [diff] [blame] | 186 | FcLangSetAdd(weakLangSet, (const FcChar8*)"matchlang"); |
bungeman | 6bc2c94 | 2014-09-09 12:50:36 -0700 | [diff] [blame] | 187 | SkAutoFcPattern weak; |
bungeman | a6785cc | 2014-08-25 12:00:49 -0700 | [diff] [blame] | 188 | FcPatternAddString(weak, object, (const FcChar8*)"nomatchstring"); |
| 189 | FcPatternAddLangSet(weak, FC_LANG, weakLangSet); |
| 190 | |
| 191 | FcFontSetAdd(fontSet, strong.detach()); |
| 192 | FcFontSetAdd(fontSet, weak.detach()); |
| 193 | |
| 194 | // Add 'matchlang' to the copy of the pattern. |
| 195 | FcPatternAddLangSet(minimal, FC_LANG, weakLangSet); |
| 196 | |
| 197 | // Run a match against the copy of the pattern. |
| 198 | // If the 'id' was weak, then we should match the pattern with 'matchlang'. |
| 199 | // If the 'id' was strong, then we should match the pattern with 'nomatchlang'. |
| 200 | |
| 201 | // Note that this config is only used for FcFontRenderPrepare, which we don't even want. |
| 202 | // However, there appears to be no way to match/sort without it. |
bungeman | 6bc2c94 | 2014-09-09 12:50:36 -0700 | [diff] [blame] | 203 | SkAutoFcConfig config; |
bungeman | a6785cc | 2014-08-25 12:00:49 -0700 | [diff] [blame] | 204 | FcFontSet* fontSets[1] = { fontSet }; |
| 205 | SkAutoFcPattern match(FcFontSetMatch(config, fontSets, SK_ARRAY_COUNT(fontSets), |
| 206 | minimal, &result)); |
| 207 | |
| 208 | FcLangSet* matchLangSet; |
| 209 | FcPatternGetLangSet(match, FC_LANG, 0, &matchLangSet); |
| 210 | return FcLangEqual == FcLangSetHasLang(matchLangSet, (const FcChar8*)"matchlang") |
| 211 | ? kIsWeak_WeakReturn : kIsStrong_WeakReturn; |
| 212 | } |
| 213 | |
| 214 | /** Removes weak elements from either FC_FAMILY or FC_POSTSCRIPT_NAME objects in the property. |
| 215 | * This can be quite expensive, and should not be used more than once per font lookup. |
| 216 | * This removes all of the weak elements after the last strong element. |
| 217 | */ |
| 218 | static void remove_weak(FcPattern* pattern, const char object[]) { |
| 219 | FCLocker::AssertHeld(); |
| 220 | |
| 221 | SkAutoFcObjectSet requestedObjectOnly(FcObjectSetBuild(object, NULL)); |
| 222 | SkAutoFcPattern minimal(FcPatternFilter(pattern, requestedObjectOnly)); |
| 223 | |
| 224 | int lastStrongId = -1; |
| 225 | int numIds; |
| 226 | SkWeakReturn result; |
| 227 | for (int id = 0; ; ++id) { |
| 228 | result = is_weak(minimal, object, 0); |
| 229 | if (kNoId_WeakReturn == result) { |
| 230 | numIds = id; |
| 231 | break; |
| 232 | } |
| 233 | if (kIsStrong_WeakReturn == result) { |
| 234 | lastStrongId = id; |
| 235 | } |
| 236 | SkAssertResult(FcPatternRemove(minimal, object, 0)); |
| 237 | } |
| 238 | |
| 239 | // If they were all weak, then leave the pattern alone. |
| 240 | if (lastStrongId < 0) { |
| 241 | return; |
| 242 | } |
| 243 | |
| 244 | // Remove everything after the last strong. |
| 245 | for (int id = lastStrongId + 1; id < numIds; ++id) { |
| 246 | SkAssertResult(FcPatternRemove(pattern, object, lastStrongId + 1)); |
| 247 | } |
| 248 | } |
| 249 | |
| 250 | static int map_range(SkFixed value, |
| 251 | SkFixed old_min, SkFixed old_max, |
| 252 | SkFixed new_min, SkFixed new_max) |
| 253 | { |
| 254 | SkASSERT(old_min < old_max); |
| 255 | SkASSERT(new_min <= new_max); |
| 256 | return new_min + SkMulDiv(value - old_min, new_max - new_min, old_max - old_min); |
| 257 | } |
| 258 | |
| 259 | static int ave(SkFixed a, SkFixed b) { |
| 260 | return SkFixedAve(a, b); |
| 261 | } |
| 262 | |
| 263 | struct MapRanges { |
| 264 | SkFixed old_val; |
| 265 | SkFixed new_val; |
| 266 | }; |
| 267 | |
| 268 | static SkFixed map_ranges_fixed(SkFixed val, MapRanges const ranges[], int rangesCount) { |
| 269 | // -Inf to [0] |
| 270 | if (val < ranges[0].old_val) { |
| 271 | return ranges[0].new_val; |
| 272 | } |
| 273 | |
| 274 | // Linear from [i] to ave([i], [i+1]), then from ave([i], [i+1]) to [i+1] |
| 275 | for (int i = 0; i < rangesCount - 1; ++i) { |
| 276 | if (val < ave(ranges[i].old_val, ranges[i+1].old_val)) { |
| 277 | return map_range(val, ranges[i].old_val, ave(ranges[i].old_val, ranges[i+1].old_val), |
| 278 | ranges[i].new_val, ave(ranges[i].new_val, ranges[i+1].new_val)); |
| 279 | } |
| 280 | if (val < ranges[i+1].old_val) { |
| 281 | return map_range(val, ave(ranges[i].old_val, ranges[i+1].old_val), ranges[i+1].old_val, |
| 282 | ave(ranges[i].new_val, ranges[i+1].new_val), ranges[i+1].new_val); |
| 283 | } |
| 284 | } |
| 285 | |
| 286 | // From [n] to +Inf |
| 287 | // if (fcweight < Inf) |
| 288 | return ranges[rangesCount-1].new_val; |
| 289 | } |
| 290 | |
| 291 | static int map_ranges(int val, MapRanges const ranges[], int rangesCount) { |
| 292 | return SkFixedRoundToInt(map_ranges_fixed(SkIntToFixed(val), ranges, rangesCount)); |
| 293 | } |
| 294 | |
| 295 | template<int n> struct SkTFixed { |
| 296 | SK_COMPILE_ASSERT(-32768 <= n && n <= 32767, SkTFixed_n_not_in_range); |
| 297 | static const SkFixed value = static_cast<SkFixed>(n << 16); |
| 298 | }; |
| 299 | |
| 300 | static SkFontStyle skfontstyle_from_fcpattern(FcPattern* pattern) { |
| 301 | typedef SkFontStyle SkFS; |
| 302 | |
| 303 | static const MapRanges weightRanges[] = { |
| 304 | { SkTFixed<FC_WEIGHT_THIN>::value, SkTFixed<SkFS::kThin_Weight>::value }, |
| 305 | { SkTFixed<FC_WEIGHT_EXTRALIGHT>::value, SkTFixed<SkFS::kExtraLight_Weight>::value }, |
| 306 | { SkTFixed<FC_WEIGHT_LIGHT>::value, SkTFixed<SkFS::kLight_Weight>::value }, |
| 307 | { SkTFixed<FC_WEIGHT_REGULAR>::value, SkTFixed<SkFS::kNormal_Weight>::value }, |
| 308 | { SkTFixed<FC_WEIGHT_MEDIUM>::value, SkTFixed<SkFS::kMedium_Weight>::value }, |
| 309 | { SkTFixed<FC_WEIGHT_DEMIBOLD>::value, SkTFixed<SkFS::kSemiBold_Weight>::value }, |
| 310 | { SkTFixed<FC_WEIGHT_BOLD>::value, SkTFixed<SkFS::kBold_Weight>::value }, |
| 311 | { SkTFixed<FC_WEIGHT_EXTRABOLD>::value, SkTFixed<SkFS::kExtraBold_Weight>::value }, |
| 312 | { SkTFixed<FC_WEIGHT_BLACK>::value, SkTFixed<SkFS::kBlack_Weight>::value }, |
| 313 | { SkTFixed<FC_WEIGHT_EXTRABLACK>::value, SkTFixed<1000>::value }, |
| 314 | }; |
| 315 | int weight = map_ranges(get_int(pattern, FC_WEIGHT, FC_WEIGHT_REGULAR), |
| 316 | weightRanges, SK_ARRAY_COUNT(weightRanges)); |
| 317 | |
| 318 | static const MapRanges widthRanges[] = { |
| 319 | { SkTFixed<FC_WIDTH_ULTRACONDENSED>::value, SkTFixed<SkFS::kUltraCondensed_Width>::value }, |
| 320 | { SkTFixed<FC_WIDTH_EXTRACONDENSED>::value, SkTFixed<SkFS::kExtraCondensed_Width>::value }, |
| 321 | { SkTFixed<FC_WIDTH_CONDENSED>::value, SkTFixed<SkFS::kCondensed_Width>::value }, |
| 322 | { SkTFixed<FC_WIDTH_SEMICONDENSED>::value, SkTFixed<SkFS::kSemiCondensed_Width>::value }, |
| 323 | { SkTFixed<FC_WIDTH_NORMAL>::value, SkTFixed<SkFS::kNormal_Width>::value }, |
| 324 | { SkTFixed<FC_WIDTH_SEMIEXPANDED>::value, SkTFixed<SkFS::kSemiExpanded_Width>::value }, |
| 325 | { SkTFixed<FC_WIDTH_EXPANDED>::value, SkTFixed<SkFS::kExpanded_Width>::value }, |
| 326 | { SkTFixed<FC_WIDTH_EXTRAEXPANDED>::value, SkTFixed<SkFS::kExtraExpanded_Width>::value }, |
| 327 | { SkTFixed<FC_WIDTH_ULTRAEXPANDED>::value, SkTFixed<SkFS::kUltaExpanded_Width>::value }, |
| 328 | }; |
| 329 | int width = map_ranges(get_int(pattern, FC_WIDTH, FC_WIDTH_NORMAL), |
| 330 | widthRanges, SK_ARRAY_COUNT(widthRanges)); |
| 331 | |
| 332 | SkFS::Slant slant = get_int(pattern, FC_SLANT, FC_SLANT_ROMAN) > 0 |
| 333 | ? SkFS::kItalic_Slant |
| 334 | : SkFS::kUpright_Slant; |
| 335 | |
| 336 | return SkFontStyle(weight, width, slant); |
| 337 | } |
| 338 | |
| 339 | static void fcpattern_from_skfontstyle(SkFontStyle style, FcPattern* pattern) { |
| 340 | FCLocker::AssertHeld(); |
| 341 | |
| 342 | typedef SkFontStyle SkFS; |
| 343 | |
| 344 | static const MapRanges weightRanges[] = { |
| 345 | { SkTFixed<SkFS::kThin_Weight>::value, SkTFixed<FC_WEIGHT_THIN>::value }, |
| 346 | { SkTFixed<SkFS::kExtraLight_Weight>::value, SkTFixed<FC_WEIGHT_EXTRALIGHT>::value }, |
| 347 | { SkTFixed<SkFS::kLight_Weight>::value, SkTFixed<FC_WEIGHT_LIGHT>::value }, |
| 348 | { SkTFixed<SkFS::kNormal_Weight>::value, SkTFixed<FC_WEIGHT_REGULAR>::value }, |
| 349 | { SkTFixed<SkFS::kMedium_Weight>::value, SkTFixed<FC_WEIGHT_MEDIUM>::value }, |
| 350 | { SkTFixed<SkFS::kSemiBold_Weight>::value, SkTFixed<FC_WEIGHT_DEMIBOLD>::value }, |
| 351 | { SkTFixed<SkFS::kBold_Weight>::value, SkTFixed<FC_WEIGHT_BOLD>::value }, |
| 352 | { SkTFixed<SkFS::kExtraBold_Weight>::value, SkTFixed<FC_WEIGHT_EXTRABOLD>::value }, |
| 353 | { SkTFixed<SkFS::kBlack_Weight>::value, SkTFixed<FC_WEIGHT_BLACK>::value }, |
| 354 | { SkTFixed<1000>::value, SkTFixed<FC_WEIGHT_EXTRABLACK>::value }, |
| 355 | }; |
| 356 | int weight = map_ranges(style.weight(), weightRanges, SK_ARRAY_COUNT(weightRanges)); |
| 357 | |
| 358 | static const MapRanges widthRanges[] = { |
| 359 | { SkTFixed<SkFS::kUltraCondensed_Width>::value, SkTFixed<FC_WIDTH_ULTRACONDENSED>::value }, |
| 360 | { SkTFixed<SkFS::kExtraCondensed_Width>::value, SkTFixed<FC_WIDTH_EXTRACONDENSED>::value }, |
| 361 | { SkTFixed<SkFS::kCondensed_Width>::value, SkTFixed<FC_WIDTH_CONDENSED>::value }, |
| 362 | { SkTFixed<SkFS::kSemiCondensed_Width>::value, SkTFixed<FC_WIDTH_SEMICONDENSED>::value }, |
| 363 | { SkTFixed<SkFS::kNormal_Width>::value, SkTFixed<FC_WIDTH_NORMAL>::value }, |
| 364 | { SkTFixed<SkFS::kSemiExpanded_Width>::value, SkTFixed<FC_WIDTH_SEMIEXPANDED>::value }, |
| 365 | { SkTFixed<SkFS::kExpanded_Width>::value, SkTFixed<FC_WIDTH_EXPANDED>::value }, |
| 366 | { SkTFixed<SkFS::kExtraExpanded_Width>::value, SkTFixed<FC_WIDTH_EXTRAEXPANDED>::value }, |
| 367 | { SkTFixed<SkFS::kUltaExpanded_Width>::value, SkTFixed<FC_WIDTH_ULTRAEXPANDED>::value }, |
| 368 | }; |
| 369 | int width = map_ranges(style.width(), widthRanges, SK_ARRAY_COUNT(widthRanges)); |
| 370 | |
| 371 | FcPatternAddInteger(pattern, FC_WEIGHT, weight); |
| 372 | FcPatternAddInteger(pattern, FC_WIDTH, width); |
| 373 | FcPatternAddInteger(pattern, FC_SLANT, style.isItalic() ? FC_SLANT_ITALIC : FC_SLANT_ROMAN); |
| 374 | } |
| 375 | |
bungeman | a6785cc | 2014-08-25 12:00:49 -0700 | [diff] [blame] | 376 | class SkTypeface_stream : public SkTypeface_FreeType { |
| 377 | public: |
bungeman | 05773ed | 2015-05-13 10:57:09 -0700 | [diff] [blame^] | 378 | /** @param data takes ownership of the font data.*/ |
| 379 | SkTypeface_stream(SkFontData* data, const SkFontStyle& style, bool fixedWidth) |
bungeman | a6785cc | 2014-08-25 12:00:49 -0700 | [diff] [blame] | 380 | : INHERITED(style, SkTypefaceCache::NewFontID(), fixedWidth) |
bungeman | 05773ed | 2015-05-13 10:57:09 -0700 | [diff] [blame^] | 381 | , fData(data) |
bungeman | a6785cc | 2014-08-25 12:00:49 -0700 | [diff] [blame] | 382 | { }; |
| 383 | |
mtklein | 36352bf | 2015-03-25 18:17:31 -0700 | [diff] [blame] | 384 | void onGetFamilyName(SkString* familyName) const override { |
bungeman | b374d6a | 2014-09-17 07:48:59 -0700 | [diff] [blame] | 385 | familyName->reset(); |
| 386 | } |
| 387 | |
mtklein | 36352bf | 2015-03-25 18:17:31 -0700 | [diff] [blame] | 388 | void onGetFontDescriptor(SkFontDescriptor* desc, bool* serialize) const override { |
bungeman | a6785cc | 2014-08-25 12:00:49 -0700 | [diff] [blame] | 389 | *serialize = true; |
| 390 | } |
| 391 | |
mtklein | 36352bf | 2015-03-25 18:17:31 -0700 | [diff] [blame] | 392 | SkStreamAsset* onOpenStream(int* ttcIndex) const override { |
bungeman | 05773ed | 2015-05-13 10:57:09 -0700 | [diff] [blame^] | 393 | *ttcIndex = fData->getIndex(); |
| 394 | return fData->duplicateStream(); |
| 395 | } |
| 396 | |
| 397 | SkFontData* onCreateFontData() const override { |
| 398 | return new SkFontData(*fData.get()); |
bungeman | a6785cc | 2014-08-25 12:00:49 -0700 | [diff] [blame] | 399 | } |
| 400 | |
| 401 | private: |
bungeman | 05773ed | 2015-05-13 10:57:09 -0700 | [diff] [blame^] | 402 | const SkAutoTDelete<const SkFontData> fData; |
bungeman | a6785cc | 2014-08-25 12:00:49 -0700 | [diff] [blame] | 403 | |
| 404 | typedef SkTypeface_FreeType INHERITED; |
| 405 | }; |
| 406 | |
| 407 | class SkTypeface_fontconfig : public SkTypeface_FreeType { |
| 408 | public: |
| 409 | /** @param pattern takes ownership of the reference. */ |
| 410 | static SkTypeface_fontconfig* Create(FcPattern* pattern) { |
| 411 | return SkNEW_ARGS(SkTypeface_fontconfig, (pattern)); |
| 412 | } |
| 413 | mutable SkAutoFcPattern fPattern; |
| 414 | |
mtklein | 36352bf | 2015-03-25 18:17:31 -0700 | [diff] [blame] | 415 | void onGetFamilyName(SkString* familyName) const override { |
bungeman | b374d6a | 2014-09-17 07:48:59 -0700 | [diff] [blame] | 416 | *familyName = get_string(fPattern, FC_FAMILY); |
| 417 | } |
| 418 | |
mtklein | 36352bf | 2015-03-25 18:17:31 -0700 | [diff] [blame] | 419 | void onGetFontDescriptor(SkFontDescriptor* desc, bool* serialize) const override { |
bungeman | a6785cc | 2014-08-25 12:00:49 -0700 | [diff] [blame] | 420 | FCLocker lock; |
| 421 | desc->setFamilyName(get_string(fPattern, FC_FAMILY)); |
bungeman | a6785cc | 2014-08-25 12:00:49 -0700 | [diff] [blame] | 422 | desc->setFullName(get_string(fPattern, FC_FULLNAME)); |
| 423 | desc->setPostscriptName(get_string(fPattern, FC_POSTSCRIPT_NAME)); |
bungeman | a6785cc | 2014-08-25 12:00:49 -0700 | [diff] [blame] | 424 | *serialize = false; |
| 425 | } |
| 426 | |
mtklein | 36352bf | 2015-03-25 18:17:31 -0700 | [diff] [blame] | 427 | SkStreamAsset* onOpenStream(int* ttcIndex) const override { |
bungeman | a6785cc | 2014-08-25 12:00:49 -0700 | [diff] [blame] | 428 | FCLocker lock; |
| 429 | *ttcIndex = get_int(fPattern, FC_INDEX, 0); |
| 430 | return SkStream::NewFromFile(get_string(fPattern, FC_FILE)); |
| 431 | } |
| 432 | |
| 433 | virtual ~SkTypeface_fontconfig() { |
| 434 | // Hold the lock while unrefing the pattern. |
| 435 | FCLocker lock; |
| 436 | fPattern.reset(); |
| 437 | } |
| 438 | |
| 439 | private: |
| 440 | /** @param pattern takes ownership of the reference. */ |
| 441 | SkTypeface_fontconfig(FcPattern* pattern) |
bungeman | a4c4a2d | 2014-10-20 13:33:19 -0700 | [diff] [blame] | 442 | : INHERITED(skfontstyle_from_fcpattern(pattern), |
bungeman | a6785cc | 2014-08-25 12:00:49 -0700 | [diff] [blame] | 443 | SkTypefaceCache::NewFontID(), |
| 444 | FC_PROPORTIONAL != get_int(pattern, FC_SPACING, FC_PROPORTIONAL)) |
| 445 | , fPattern(pattern) |
| 446 | { }; |
| 447 | |
| 448 | typedef SkTypeface_FreeType INHERITED; |
| 449 | }; |
| 450 | |
| 451 | class SkFontMgr_fontconfig : public SkFontMgr { |
| 452 | mutable SkAutoFcConfig fFC; |
| 453 | SkAutoTUnref<SkDataTable> fFamilyNames; |
bungeman | 14df833 | 2014-10-28 15:07:23 -0700 | [diff] [blame] | 454 | SkTypeface_FreeType::Scanner fScanner; |
bungeman | a6785cc | 2014-08-25 12:00:49 -0700 | [diff] [blame] | 455 | |
| 456 | class StyleSet : public SkFontStyleSet { |
| 457 | public: |
| 458 | /** @param parent does not take ownership of the reference. |
| 459 | * @param fontSet takes ownership of the reference. |
| 460 | */ |
| 461 | StyleSet(const SkFontMgr_fontconfig* parent, FcFontSet* fontSet) |
| 462 | : fFontMgr(SkRef(parent)), fFontSet(fontSet) |
| 463 | { } |
| 464 | |
| 465 | virtual ~StyleSet() { |
| 466 | // Hold the lock while unrefing the font set. |
| 467 | FCLocker lock; |
| 468 | fFontSet.reset(); |
| 469 | } |
| 470 | |
mtklein | 36352bf | 2015-03-25 18:17:31 -0700 | [diff] [blame] | 471 | int count() override { return fFontSet->nfont; } |
bungeman | a6785cc | 2014-08-25 12:00:49 -0700 | [diff] [blame] | 472 | |
mtklein | 36352bf | 2015-03-25 18:17:31 -0700 | [diff] [blame] | 473 | void getStyle(int index, SkFontStyle* style, SkString* styleName) override { |
bungeman | a6785cc | 2014-08-25 12:00:49 -0700 | [diff] [blame] | 474 | if (index < 0 || fFontSet->nfont <= index) { |
| 475 | return; |
| 476 | } |
| 477 | |
| 478 | FCLocker lock; |
| 479 | if (style) { |
| 480 | *style = skfontstyle_from_fcpattern(fFontSet->fonts[index]); |
| 481 | } |
| 482 | if (styleName) { |
| 483 | *styleName = get_string(fFontSet->fonts[index], FC_STYLE); |
| 484 | } |
| 485 | } |
| 486 | |
mtklein | 36352bf | 2015-03-25 18:17:31 -0700 | [diff] [blame] | 487 | SkTypeface* createTypeface(int index) override { |
bungeman | a6785cc | 2014-08-25 12:00:49 -0700 | [diff] [blame] | 488 | FCLocker lock; |
| 489 | |
| 490 | FcPattern* match = fFontSet->fonts[index]; |
| 491 | return fFontMgr->createTypefaceFromFcPattern(match); |
| 492 | } |
| 493 | |
mtklein | 36352bf | 2015-03-25 18:17:31 -0700 | [diff] [blame] | 494 | SkTypeface* matchStyle(const SkFontStyle& style) override { |
bungeman | a6785cc | 2014-08-25 12:00:49 -0700 | [diff] [blame] | 495 | FCLocker lock; |
| 496 | |
bungeman | 6bc2c94 | 2014-09-09 12:50:36 -0700 | [diff] [blame] | 497 | SkAutoFcPattern pattern; |
bungeman | a6785cc | 2014-08-25 12:00:49 -0700 | [diff] [blame] | 498 | fcpattern_from_skfontstyle(style, pattern); |
| 499 | FcConfigSubstitute(fFontMgr->fFC, pattern, FcMatchPattern); |
| 500 | FcDefaultSubstitute(pattern); |
| 501 | |
| 502 | FcResult result; |
| 503 | FcFontSet* fontSets[1] = { fFontSet }; |
| 504 | SkAutoFcPattern match(FcFontSetMatch(fFontMgr->fFC, |
| 505 | fontSets, SK_ARRAY_COUNT(fontSets), |
| 506 | pattern, &result)); |
| 507 | if (NULL == match) { |
| 508 | return NULL; |
| 509 | } |
| 510 | |
| 511 | return fFontMgr->createTypefaceFromFcPattern(match); |
| 512 | } |
| 513 | |
| 514 | private: |
| 515 | SkAutoTUnref<const SkFontMgr_fontconfig> fFontMgr; |
| 516 | SkAutoFcFontSet fFontSet; |
| 517 | }; |
| 518 | |
| 519 | static bool FindName(const SkTDArray<const char*>& list, const char* str) { |
| 520 | int count = list.count(); |
| 521 | for (int i = 0; i < count; ++i) { |
| 522 | if (!strcmp(list[i], str)) { |
| 523 | return true; |
| 524 | } |
| 525 | } |
| 526 | return false; |
| 527 | } |
| 528 | |
| 529 | static SkDataTable* GetFamilyNames(FcConfig* fcconfig) { |
| 530 | FCLocker lock; |
| 531 | |
| 532 | SkTDArray<const char*> names; |
| 533 | SkTDArray<size_t> sizes; |
| 534 | |
| 535 | static const FcSetName fcNameSet[] = { FcSetSystem, FcSetApplication }; |
| 536 | for (int setIndex = 0; setIndex < (int)SK_ARRAY_COUNT(fcNameSet); ++setIndex) { |
| 537 | // Return value of FcConfigGetFonts must not be destroyed. |
| 538 | FcFontSet* allFonts(FcConfigGetFonts(fcconfig, fcNameSet[setIndex])); |
| 539 | if (NULL == allFonts) { |
| 540 | continue; |
| 541 | } |
| 542 | |
| 543 | for (int fontIndex = 0; fontIndex < allFonts->nfont; ++fontIndex) { |
| 544 | FcPattern* current = allFonts->fonts[fontIndex]; |
| 545 | for (int id = 0; ; ++id) { |
| 546 | FcChar8* fcFamilyName; |
| 547 | FcResult result = FcPatternGetString(current, FC_FAMILY, id, &fcFamilyName); |
| 548 | if (FcResultNoId == result) { |
| 549 | break; |
| 550 | } |
| 551 | if (FcResultMatch != result) { |
| 552 | continue; |
| 553 | } |
| 554 | const char* familyName = reinterpret_cast<const char*>(fcFamilyName); |
| 555 | if (familyName && !FindName(names, familyName)) { |
| 556 | *names.append() = familyName; |
| 557 | *sizes.append() = strlen(familyName) + 1; |
| 558 | } |
| 559 | } |
| 560 | } |
| 561 | } |
| 562 | |
| 563 | return SkDataTable::NewCopyArrays((void const *const *)names.begin(), |
| 564 | sizes.begin(), names.count()); |
| 565 | } |
| 566 | |
bungeman | a4c4a2d | 2014-10-20 13:33:19 -0700 | [diff] [blame] | 567 | static bool FindByFcPattern(SkTypeface* cached, const SkFontStyle&, void* ctx) { |
bungeman | a6785cc | 2014-08-25 12:00:49 -0700 | [diff] [blame] | 568 | SkTypeface_fontconfig* cshFace = static_cast<SkTypeface_fontconfig*>(cached); |
| 569 | FcPattern* ctxPattern = static_cast<FcPattern*>(ctx); |
| 570 | return FcTrue == FcPatternEqual(cshFace->fPattern, ctxPattern); |
| 571 | } |
| 572 | |
| 573 | mutable SkMutex fTFCacheMutex; |
| 574 | mutable SkTypefaceCache fTFCache; |
| 575 | /** Creates a typeface using a typeface cache. |
| 576 | * @param pattern a complete pattern from FcFontRenderPrepare. |
| 577 | */ |
| 578 | SkTypeface* createTypefaceFromFcPattern(FcPattern* pattern) const { |
| 579 | FCLocker::AssertHeld(); |
| 580 | SkAutoMutexAcquire ama(fTFCacheMutex); |
| 581 | SkTypeface* face = fTFCache.findByProcAndRef(FindByFcPattern, pattern); |
| 582 | if (NULL == face) { |
| 583 | FcPatternReference(pattern); |
| 584 | face = SkTypeface_fontconfig::Create(pattern); |
| 585 | if (face) { |
mtklein | 60b6e9d | 2014-10-24 10:43:15 -0700 | [diff] [blame] | 586 | fTFCache.add(face, SkFontStyle()); |
bungeman | a6785cc | 2014-08-25 12:00:49 -0700 | [diff] [blame] | 587 | } |
| 588 | } |
| 589 | return face; |
| 590 | } |
| 591 | |
| 592 | public: |
| 593 | SkFontMgr_fontconfig() |
| 594 | : fFC(FcInitLoadConfigAndFonts()) |
| 595 | , fFamilyNames(GetFamilyNames(fFC)) { } |
| 596 | |
| 597 | /** Takes control of the reference to 'config'. */ |
| 598 | explicit SkFontMgr_fontconfig(FcConfig* config) |
| 599 | : fFC(config) |
| 600 | , fFamilyNames(GetFamilyNames(fFC)) { } |
| 601 | |
| 602 | virtual ~SkFontMgr_fontconfig() { |
| 603 | // Hold the lock while unrefing the config. |
| 604 | FCLocker lock; |
| 605 | fFC.reset(); |
| 606 | } |
| 607 | |
| 608 | protected: |
mtklein | 36352bf | 2015-03-25 18:17:31 -0700 | [diff] [blame] | 609 | int onCountFamilies() const override { |
bungeman | a6785cc | 2014-08-25 12:00:49 -0700 | [diff] [blame] | 610 | return fFamilyNames->count(); |
| 611 | } |
| 612 | |
mtklein | 36352bf | 2015-03-25 18:17:31 -0700 | [diff] [blame] | 613 | void onGetFamilyName(int index, SkString* familyName) const override { |
bungeman | a6785cc | 2014-08-25 12:00:49 -0700 | [diff] [blame] | 614 | familyName->set(fFamilyNames->atStr(index)); |
| 615 | } |
| 616 | |
mtklein | 36352bf | 2015-03-25 18:17:31 -0700 | [diff] [blame] | 617 | SkFontStyleSet* onCreateStyleSet(int index) const override { |
bungeman | a6785cc | 2014-08-25 12:00:49 -0700 | [diff] [blame] | 618 | return this->onMatchFamily(fFamilyNames->atStr(index)); |
| 619 | } |
| 620 | |
| 621 | /** True if any string object value in the font is the same |
| 622 | * as a string object value in the pattern. |
| 623 | */ |
| 624 | static bool AnyMatching(FcPattern* font, FcPattern* pattern, const char* object) { |
| 625 | FcChar8* fontString; |
| 626 | FcChar8* patternString; |
| 627 | FcResult result; |
| 628 | // Set an arbitrary limit on the number of pattern object values to consider. |
| 629 | // TODO: re-write this to avoid N*M |
| 630 | static const int maxId = 16; |
| 631 | for (int patternId = 0; patternId < maxId; ++patternId) { |
| 632 | result = FcPatternGetString(pattern, object, patternId, &patternString); |
| 633 | if (FcResultNoId == result) { |
| 634 | break; |
| 635 | } |
| 636 | if (FcResultMatch != result) { |
| 637 | continue; |
| 638 | } |
| 639 | for (int fontId = 0; fontId < maxId; ++fontId) { |
| 640 | result = FcPatternGetString(font, object, fontId, &fontString); |
| 641 | if (FcResultNoId == result) { |
| 642 | break; |
| 643 | } |
| 644 | if (FcResultMatch != result) { |
| 645 | continue; |
| 646 | } |
| 647 | if (0 == FcStrCmpIgnoreCase(patternString, fontString)) { |
| 648 | return true; |
| 649 | } |
| 650 | } |
| 651 | } |
| 652 | return false; |
| 653 | } |
| 654 | |
bungeman | 6bc2c94 | 2014-09-09 12:50:36 -0700 | [diff] [blame] | 655 | static bool FontAccessible(FcPattern* font) { |
bungeman | a6785cc | 2014-08-25 12:00:49 -0700 | [diff] [blame] | 656 | // FontConfig can return fonts which are unreadable. |
bungeman | 6bc2c94 | 2014-09-09 12:50:36 -0700 | [diff] [blame] | 657 | const char* filename = get_string(font, FC_FILE, NULL); |
bungeman | a6785cc | 2014-08-25 12:00:49 -0700 | [diff] [blame] | 658 | if (NULL == filename) { |
| 659 | return false; |
| 660 | } |
| 661 | return sk_exists(filename, kRead_SkFILE_Flag); |
| 662 | } |
| 663 | |
bungeman | 6bc2c94 | 2014-09-09 12:50:36 -0700 | [diff] [blame] | 664 | static bool FontFamilyNameMatches(FcPattern* font, FcPattern* pattern) { |
| 665 | return AnyMatching(font, pattern, FC_FAMILY); |
| 666 | } |
| 667 | |
| 668 | static bool FontContainsCharacter(FcPattern* font, uint32_t character) { |
| 669 | FcResult result; |
| 670 | FcCharSet* matchCharSet; |
| 671 | for (int charSetId = 0; ; ++charSetId) { |
| 672 | result = FcPatternGetCharSet(font, FC_CHARSET, charSetId, &matchCharSet); |
| 673 | if (FcResultNoId == result) { |
| 674 | break; |
| 675 | } |
| 676 | if (FcResultMatch != result) { |
| 677 | continue; |
| 678 | } |
| 679 | if (FcCharSetHasChar(matchCharSet, character)) { |
| 680 | return true; |
| 681 | } |
| 682 | } |
| 683 | return false; |
bungeman | a6785cc | 2014-08-25 12:00:49 -0700 | [diff] [blame] | 684 | } |
| 685 | |
mtklein | 36352bf | 2015-03-25 18:17:31 -0700 | [diff] [blame] | 686 | SkFontStyleSet* onMatchFamily(const char familyName[]) const override { |
bungeman | a6785cc | 2014-08-25 12:00:49 -0700 | [diff] [blame] | 687 | FCLocker lock; |
| 688 | |
bungeman | 6bc2c94 | 2014-09-09 12:50:36 -0700 | [diff] [blame] | 689 | SkAutoFcPattern pattern; |
bungeman | a6785cc | 2014-08-25 12:00:49 -0700 | [diff] [blame] | 690 | FcPatternAddString(pattern, FC_FAMILY, (FcChar8*)familyName); |
| 691 | FcConfigSubstitute(fFC, pattern, FcMatchPattern); |
| 692 | FcDefaultSubstitute(pattern); |
| 693 | |
| 694 | FcPattern* matchPattern; |
| 695 | SkAutoFcPattern strongPattern(NULL); |
| 696 | if (familyName) { |
| 697 | strongPattern.reset(FcPatternDuplicate(pattern)); |
| 698 | remove_weak(strongPattern, FC_FAMILY); |
| 699 | matchPattern = strongPattern; |
| 700 | } else { |
| 701 | matchPattern = pattern; |
| 702 | } |
| 703 | |
bungeman | 6bc2c94 | 2014-09-09 12:50:36 -0700 | [diff] [blame] | 704 | SkAutoFcFontSet matches; |
bungeman | a6785cc | 2014-08-25 12:00:49 -0700 | [diff] [blame] | 705 | // TODO: Some families have 'duplicates' due to symbolic links. |
| 706 | // The patterns are exactly the same except for the FC_FILE. |
| 707 | // It should be possible to collapse these patterns by normalizing. |
| 708 | static const FcSetName fcNameSet[] = { FcSetSystem, FcSetApplication }; |
| 709 | for (int setIndex = 0; setIndex < (int)SK_ARRAY_COUNT(fcNameSet); ++setIndex) { |
| 710 | // Return value of FcConfigGetFonts must not be destroyed. |
| 711 | FcFontSet* allFonts(FcConfigGetFonts(fFC, fcNameSet[setIndex])); |
| 712 | if (NULL == allFonts) { |
| 713 | continue; |
| 714 | } |
| 715 | |
| 716 | for (int fontIndex = 0; fontIndex < allFonts->nfont; ++fontIndex) { |
bungeman | 6bc2c94 | 2014-09-09 12:50:36 -0700 | [diff] [blame] | 717 | FcPattern* font = allFonts->fonts[fontIndex]; |
| 718 | if (FontAccessible(font) && FontFamilyNameMatches(font, matchPattern)) { |
| 719 | FcFontSetAdd(matches, FcFontRenderPrepare(fFC, pattern, font)); |
bungeman | a6785cc | 2014-08-25 12:00:49 -0700 | [diff] [blame] | 720 | } |
| 721 | } |
| 722 | } |
| 723 | |
| 724 | return SkNEW_ARGS(StyleSet, (this, matches.detach())); |
| 725 | } |
| 726 | |
| 727 | virtual SkTypeface* onMatchFamilyStyle(const char familyName[], |
mtklein | 36352bf | 2015-03-25 18:17:31 -0700 | [diff] [blame] | 728 | const SkFontStyle& style) const override |
bungeman | a6785cc | 2014-08-25 12:00:49 -0700 | [diff] [blame] | 729 | { |
| 730 | FCLocker lock; |
| 731 | |
bungeman | 6bc2c94 | 2014-09-09 12:50:36 -0700 | [diff] [blame] | 732 | SkAutoFcPattern pattern; |
bungeman | a6785cc | 2014-08-25 12:00:49 -0700 | [diff] [blame] | 733 | FcPatternAddString(pattern, FC_FAMILY, (FcChar8*)familyName); |
| 734 | fcpattern_from_skfontstyle(style, pattern); |
| 735 | FcConfigSubstitute(fFC, pattern, FcMatchPattern); |
| 736 | FcDefaultSubstitute(pattern); |
| 737 | |
| 738 | // We really want to match strong (prefered) and same (acceptable) only here. |
| 739 | // If a family name was specified, assume that any weak matches after the last strong match |
| 740 | // are weak (default) and ignore them. |
| 741 | // The reason for is that after substitution the pattern for 'sans-serif' looks like |
| 742 | // "wwwwwwwwwwwwwwswww" where there are many weak but preferred names, followed by defaults. |
| 743 | // So it is possible to have weakly matching but preferred names. |
| 744 | // In aliases, bindings are weak by default, so this is easy and common. |
| 745 | // If no family name was specified, we'll probably only get weak matches, but that's ok. |
| 746 | FcPattern* matchPattern; |
| 747 | SkAutoFcPattern strongPattern(NULL); |
| 748 | if (familyName) { |
| 749 | strongPattern.reset(FcPatternDuplicate(pattern)); |
| 750 | remove_weak(strongPattern, FC_FAMILY); |
| 751 | matchPattern = strongPattern; |
| 752 | } else { |
| 753 | matchPattern = pattern; |
| 754 | } |
| 755 | |
| 756 | FcResult result; |
bungeman | 6bc2c94 | 2014-09-09 12:50:36 -0700 | [diff] [blame] | 757 | SkAutoFcPattern font(FcFontMatch(fFC, pattern, &result)); |
| 758 | if (NULL == font || !FontAccessible(font) || !FontFamilyNameMatches(font, matchPattern)) { |
bungeman | a6785cc | 2014-08-25 12:00:49 -0700 | [diff] [blame] | 759 | return NULL; |
| 760 | } |
| 761 | |
bungeman | 6bc2c94 | 2014-09-09 12:50:36 -0700 | [diff] [blame] | 762 | return createTypefaceFromFcPattern(font); |
| 763 | } |
| 764 | |
| 765 | virtual SkTypeface* onMatchFamilyStyleCharacter(const char familyName[], |
| 766 | const SkFontStyle& style, |
bungeman | c20386e | 2014-10-23 07:08:05 -0700 | [diff] [blame] | 767 | const char* bcp47[], |
| 768 | int bcp47Count, |
mtklein | 36352bf | 2015-03-25 18:17:31 -0700 | [diff] [blame] | 769 | SkUnichar character) const override |
bungeman | 6bc2c94 | 2014-09-09 12:50:36 -0700 | [diff] [blame] | 770 | { |
| 771 | FCLocker lock; |
| 772 | |
| 773 | SkAutoFcPattern pattern; |
bungeman | 6837b38 | 2015-04-29 14:35:49 -0700 | [diff] [blame] | 774 | if (familyName) { |
| 775 | FcValue familyNameValue; |
| 776 | familyNameValue.type = FcTypeString; |
| 777 | familyNameValue.u.s = reinterpret_cast<const FcChar8*>(familyName); |
| 778 | FcPatternAddWeak(pattern, FC_FAMILY, familyNameValue, FcFalse); |
| 779 | } |
bungeman | 6bc2c94 | 2014-09-09 12:50:36 -0700 | [diff] [blame] | 780 | fcpattern_from_skfontstyle(style, pattern); |
| 781 | |
| 782 | SkAutoFcCharSet charSet; |
| 783 | FcCharSetAddChar(charSet, character); |
| 784 | FcPatternAddCharSet(pattern, FC_CHARSET, charSet); |
| 785 | |
bungeman | c20386e | 2014-10-23 07:08:05 -0700 | [diff] [blame] | 786 | if (bcp47Count > 0) { |
| 787 | SkASSERT(bcp47); |
bungeman | 6bc2c94 | 2014-09-09 12:50:36 -0700 | [diff] [blame] | 788 | SkAutoFcLangSet langSet; |
bungeman | c20386e | 2014-10-23 07:08:05 -0700 | [diff] [blame] | 789 | for (int i = bcp47Count; i --> 0;) { |
| 790 | FcLangSetAdd(langSet, (const FcChar8*)bcp47[i]); |
| 791 | } |
bungeman | 6bc2c94 | 2014-09-09 12:50:36 -0700 | [diff] [blame] | 792 | FcPatternAddLangSet(pattern, FC_LANG, langSet); |
| 793 | } |
| 794 | |
| 795 | FcConfigSubstitute(fFC, pattern, FcMatchPattern); |
| 796 | FcDefaultSubstitute(pattern); |
| 797 | |
| 798 | FcResult result; |
| 799 | SkAutoFcPattern font(FcFontMatch(fFC, pattern, &result)); |
| 800 | if (NULL == font || !FontAccessible(font) || !FontContainsCharacter(font, character)) { |
| 801 | return NULL; |
| 802 | } |
| 803 | |
| 804 | return createTypefaceFromFcPattern(font); |
bungeman | a6785cc | 2014-08-25 12:00:49 -0700 | [diff] [blame] | 805 | } |
| 806 | |
| 807 | virtual SkTypeface* onMatchFaceStyle(const SkTypeface* typeface, |
mtklein | 36352bf | 2015-03-25 18:17:31 -0700 | [diff] [blame] | 808 | const SkFontStyle& style) const override |
bungeman | a6785cc | 2014-08-25 12:00:49 -0700 | [diff] [blame] | 809 | { |
| 810 | //TODO: should the SkTypeface_fontconfig know its family? |
bungeman | b14e4a0 | 2014-09-18 13:57:20 -0700 | [diff] [blame] | 811 | const SkTypeface_fontconfig* fcTypeface = |
bungeman | 9db5092 | 2014-09-12 12:14:14 -0700 | [diff] [blame] | 812 | static_cast<const SkTypeface_fontconfig*>(typeface); |
bungeman | b14e4a0 | 2014-09-18 13:57:20 -0700 | [diff] [blame] | 813 | return this->matchFamilyStyle(get_string(fcTypeface->fPattern, FC_FAMILY), style); |
bungeman | a6785cc | 2014-08-25 12:00:49 -0700 | [diff] [blame] | 814 | } |
| 815 | |
mtklein | 36352bf | 2015-03-25 18:17:31 -0700 | [diff] [blame] | 816 | SkTypeface* onCreateFromStream(SkStreamAsset* bareStream, int ttcIndex) const override { |
bungeman | 5f213d9 | 2015-01-27 05:39:10 -0800 | [diff] [blame] | 817 | SkAutoTDelete<SkStreamAsset> stream(bareStream); |
bungeman | a6785cc | 2014-08-25 12:00:49 -0700 | [diff] [blame] | 818 | const size_t length = stream->getLength(); |
| 819 | if (length <= 0 || (1u << 30) < length) { |
| 820 | return NULL; |
| 821 | } |
| 822 | |
bungeman | a4c4a2d | 2014-10-20 13:33:19 -0700 | [diff] [blame] | 823 | SkFontStyle style; |
bungeman | a6785cc | 2014-08-25 12:00:49 -0700 | [diff] [blame] | 824 | bool isFixedWidth = false; |
bungeman | 05773ed | 2015-05-13 10:57:09 -0700 | [diff] [blame^] | 825 | if (!fScanner.scanFont(stream, ttcIndex, NULL, &style, &isFixedWidth, NULL)) { |
bungeman | a6785cc | 2014-08-25 12:00:49 -0700 | [diff] [blame] | 826 | return NULL; |
| 827 | } |
| 828 | |
bungeman | 05773ed | 2015-05-13 10:57:09 -0700 | [diff] [blame^] | 829 | return SkNEW_ARGS(SkTypeface_stream, (new SkFontData(stream.detach(), ttcIndex, NULL, 0), |
| 830 | style, isFixedWidth)); |
bungeman | a6785cc | 2014-08-25 12:00:49 -0700 | [diff] [blame] | 831 | } |
| 832 | |
mtklein | 36352bf | 2015-03-25 18:17:31 -0700 | [diff] [blame] | 833 | SkTypeface* onCreateFromData(SkData* data, int ttcIndex) const override { |
scroggo | a1193e4 | 2015-01-21 12:09:53 -0800 | [diff] [blame] | 834 | return this->createFromStream(SkNEW_ARGS(SkMemoryStream, (data)), ttcIndex); |
bungeman | a6785cc | 2014-08-25 12:00:49 -0700 | [diff] [blame] | 835 | } |
| 836 | |
mtklein | 36352bf | 2015-03-25 18:17:31 -0700 | [diff] [blame] | 837 | SkTypeface* onCreateFromFile(const char path[], int ttcIndex) const override { |
scroggo | a1193e4 | 2015-01-21 12:09:53 -0800 | [diff] [blame] | 838 | return this->createFromStream(SkStream::NewFromFile(path), ttcIndex); |
bungeman | a6785cc | 2014-08-25 12:00:49 -0700 | [diff] [blame] | 839 | } |
| 840 | |
bungeman | 05773ed | 2015-05-13 10:57:09 -0700 | [diff] [blame^] | 841 | SkTypeface* onCreateFromFontData(SkFontData* fontData) const override { |
| 842 | SkStreamAsset* stream(fontData->getStream()); |
| 843 | const size_t length = stream->getLength(); |
| 844 | if (length <= 0 || (1u << 30) < length) { |
| 845 | return NULL; |
| 846 | } |
| 847 | |
| 848 | const int ttcIndex = fontData->getIndex(); |
| 849 | SkFontStyle style; |
| 850 | bool isFixedWidth = false; |
| 851 | if (!fScanner.scanFont(stream, ttcIndex, NULL, &style, &isFixedWidth, NULL)) { |
| 852 | return NULL; |
| 853 | } |
| 854 | |
| 855 | return SkNEW_ARGS(SkTypeface_stream, (fontData, style, isFixedWidth)); |
| 856 | } |
| 857 | |
bungeman | a6785cc | 2014-08-25 12:00:49 -0700 | [diff] [blame] | 858 | virtual SkTypeface* onLegacyCreateTypeface(const char familyName[], |
mtklein | 36352bf | 2015-03-25 18:17:31 -0700 | [diff] [blame] | 859 | unsigned styleBits) const override { |
bungeman | a6785cc | 2014-08-25 12:00:49 -0700 | [diff] [blame] | 860 | bool bold = styleBits & SkTypeface::kBold; |
| 861 | bool italic = styleBits & SkTypeface::kItalic; |
| 862 | SkFontStyle style = SkFontStyle(bold ? SkFontStyle::kBold_Weight |
| 863 | : SkFontStyle::kNormal_Weight, |
| 864 | SkFontStyle::kNormal_Width, |
| 865 | italic ? SkFontStyle::kItalic_Slant |
| 866 | : SkFontStyle::kUpright_Slant); |
| 867 | SkAutoTUnref<SkTypeface> typeface(this->matchFamilyStyle(familyName, style)); |
bsalomon | 49f085d | 2014-09-05 13:34:00 -0700 | [diff] [blame] | 868 | if (typeface.get()) { |
bungeman | a6785cc | 2014-08-25 12:00:49 -0700 | [diff] [blame] | 869 | return typeface.detach(); |
| 870 | } |
| 871 | |
| 872 | return this->matchFamilyStyle(NULL, style); |
| 873 | } |
| 874 | }; |
| 875 | |
| 876 | SkFontMgr* SkFontMgr::Factory() { |
| 877 | return SkNEW(SkFontMgr_fontconfig); |
| 878 | } |