FontCollection.cpp revision bbdd73ec077a1bb6801b25a639834be16dfd78cb
11a9c27c312ba20b2ceafcde18ce451724782d2a5Ficus Kirkpatrick/* 21a9c27c312ba20b2ceafcde18ce451724782d2a5Ficus Kirkpatrick * Copyright (C) 2013 The Android Open Source Project 39066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 48451b25a4422656bbd6657a5855e69c0f4d53c74Elliott Hughes * Licensed under the Apache License, Version 2.0 (the "License"); 59066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * you may not use this file except in compliance with the License. 6e4ac2d6b5723c95e648c489b187ddde449452c13Patrick Dubroy * You may obtain a copy of the License at 7e4ac2d6b5723c95e648c489b187ddde449452c13Patrick Dubroy * 8e4ac2d6b5723c95e648c489b187ddde449452c13Patrick Dubroy * http://www.apache.org/licenses/LICENSE-2.0 99066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Unless required by applicable law or agreed to in writing, software 119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * distributed under the License is distributed on an "AS IS" BASIS, 129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * See the License for the specific language governing permissions and 1469a017bc1d1649350f830dfada5c6ed5eac0b770Elliott Hughes * limitations under the License. 159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project// #define VERBOSE_DEBUG 188451b25a4422656bbd6657a5855e69c0f4d53c74Elliott Hughes 199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project#define LOG_TAG "Minikin" 209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project#include <cutils/log.h> 219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2269a017bc1d1649350f830dfada5c6ed5eac0b770Elliott Hughes#include "unicode/unistr.h" 239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project#include "unicode/unorm2.h" 249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project#include "MinikinInternal.h" 268451b25a4422656bbd6657a5855e69c0f4d53c74Elliott Hughes#include <minikin/FontCollection.h> 279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectusing std::vector; 299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 308451b25a4422656bbd6657a5855e69c0f4d53c74Elliott Hughesnamespace android { 319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projecttemplate <typename T> 339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectstatic inline T max(T a, T b) { 348451b25a4422656bbd6657a5855e69c0f4d53c74Elliott Hughes return a>b ? a : b; 359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project} 369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 37f1f48bc7f200f54c76b22d845d8ba8419879b375Joseph Wenuint32_t FontCollection::sNextId = 0; 388451b25a4422656bbd6657a5855e69c0f4d53c74Elliott Hughes 39f1f48bc7f200f54c76b22d845d8ba8419879b375Joseph WenFontCollection::FontCollection(const vector<FontFamily*>& typefaces) : 40f1f48bc7f200f54c76b22d845d8ba8419879b375Joseph Wen mMaxChar(0) { 419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project AutoMutex _l(gMinikinLock); 429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mId = sNextId++; 433762c311729fe9f3af085c14c5c1fb471d994c03Steve Block vector<uint32_t> lastChar; 449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project size_t nTypefaces = typefaces.size(); 459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project#ifdef VERBOSE_DEBUG 469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project ALOGD("nTypefaces = %d\n", nTypefaces); 479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project#endif 489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project const FontStyle defaultStyle; 499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project for (size_t i = 0; i < nTypefaces; i++) { 509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project FontFamily* family = typefaces[i]; 519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project MinikinFont* typeface = family->getClosestMatch(defaultStyle).font; 529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (typeface == NULL) { 53c04851fd0af87f44a7d7351e0c17442fa1d3fc28Mike Reed continue; 549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project family->RefLocked(); 569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project const SparseBitSet* coverage = family->getCoverage(); 579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (coverage == nullptr) { 589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project family->UnrefLocked(); 599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project continue; 609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mFamilies.push_back(family); // emplace_back would be better 629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mMaxChar = max(mMaxChar, coverage->length()); 63c04851fd0af87f44a7d7351e0c17442fa1d3fc28Mike Reed lastChar.push_back(coverage->nextSetBit(0)); 649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project nTypefaces = mFamilies.size(); 669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project LOG_ALWAYS_FATAL_IF(nTypefaces == 0, 679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project "Font collection must have at least one valid typeface"); 68c04851fd0af87f44a7d7351e0c17442fa1d3fc28Mike Reed size_t nPages = (mMaxChar + kPageMask) >> kLogCharsPerPage; 699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project size_t offset = 0; 709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project for (size_t i = 0; i < nPages; i++) { 719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project Range dummy; 729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mRanges.push_back(dummy); 739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project Range* range = &mRanges.back(); 749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project#ifdef VERBOSE_DEBUG 759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project ALOGD("i=%d: range start = %d\n", i, offset); 769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project#endif 779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project range->start = offset; 789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project for (size_t j = 0; j < nTypefaces; j++) { 799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (lastChar[j] < (i + 1) << kLogCharsPerPage) { 809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project FontFamily* family = mFamilies[j]; 819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mFamilyVec.push_back(family); 829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project offset++; 839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project uint32_t nextChar = family->getCoverage()->nextSetBit((i + 1) << kLogCharsPerPage); 849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project#ifdef VERBOSE_DEBUG 859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project ALOGD("nextChar = %d (j = %d)\n", nextChar, j); 869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project#endif 879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project lastChar[j] = nextChar; 889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project range->end = offset; 919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 92c04851fd0af87f44a7d7351e0c17442fa1d3fc28Mike Reed} 939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source ProjectFontCollection::~FontCollection() { 959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project for (size_t i = 0; i < mFamilies.size(); i++) { 969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mFamilies[i]->UnrefLocked(); 979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project} 999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project// Implement heuristic for choosing best-match font. Here are the rules: 1019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project// 1. If first font in the collection has the character, it wins. 102c04851fd0af87f44a7d7351e0c17442fa1d3fc28Mike Reed// 2. If a font matches both language and script, it gets a score of 4. 1039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project// 3. If a font matches just language, it gets a score of 2. 1049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project// 4. Matching the "compact" or "elegant" variant adds one to the score. 1059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project// 5. Highest score wins, with ties resolved to the first font. 1069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source ProjectFontFamily* FontCollection::getFamilyForChar(uint32_t ch, uint32_t vs, 107c04851fd0af87f44a7d7351e0c17442fa1d3fc28Mike Reed FontLanguage lang, int variant) const { 1089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (ch >= mMaxChar) { 1099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return NULL; 1109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project const Range& range = mRanges[ch >> kLogCharsPerPage]; 1129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project#ifdef VERBOSE_DEBUG 1139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project ALOGD("querying range %d:%d\n", range.start, range.end); 1149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project#endif 1159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project FontFamily* bestFamily = nullptr; 1169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int bestScore = -1; 1179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project for (size_t i = range.start; i < range.end; i++) { 1189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project FontFamily* family = mFamilyVec[i]; 1199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (vs == 0 ? family->getCoverage()->get(ch) : family->hasVariationSelector(ch, vs)) { 1209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // First font family in collection always matches 1219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mFamilies[0] == family) { 1229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return family; 1239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int score = lang.match(family->lang()) * 2; 1259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (family->variant() == 0 || family->variant() == variant) { 1269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project score++; 1279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (score > bestScore) { 1299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project bestScore = score; 1309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project bestFamily = family; 1319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (bestFamily == nullptr && vs != 0) { 1359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // If no fonts support the codepoint and variation selector pair, 1369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // fallback to select a font family that supports just the base 1379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // character, ignoring the variation selector. 1389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return getFamilyForChar(ch, 0, lang, variant); 1399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (bestFamily == nullptr && !mFamilyVec.empty()) { 1419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project UErrorCode errorCode = U_ZERO_ERROR; 1429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project const UNormalizer2* normalizer = unorm2_getNFDInstance(&errorCode); 1439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (U_SUCCESS(errorCode)) { 1449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project UChar decomposed[4]; 1459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int len = unorm2_getRawDecomposition(normalizer, ch, decomposed, 4, &errorCode); 1469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (U_SUCCESS(errorCode) && len > 0) { 1479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int off = 0; 1489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project U16_NEXT_UNSAFE(decomposed, off, ch); 1499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return getFamilyForChar(ch, vs, lang, variant); 1509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project bestFamily = mFamilies[0]; 1539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return bestFamily; 1559f58361e98be7386a4eadd3aa254e9b7d09d0a3bChris Craik} 1569f58361e98be7386a4eadd3aa254e9b7d09d0a3bChris Craik 1579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectconst uint32_t NBSP = 0xa0; 1589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectconst uint32_t ZWJ = 0x200c; 1599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectconst uint32_t ZWNJ = 0x200d; 1609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectconst uint32_t KEYCAP = 0x20e3; 1616b849e2123be98eb2a1a25b8abf0b13a279ce952Wei-Ta Chenconst uint32_t HYPHEN = 0x2010; 1626b849e2123be98eb2a1a25b8abf0b13a279ce952Wei-Ta Chenconst uint32_t NB_HYPHEN = 0x2011; 163f1f48bc7f200f54c76b22d845d8ba8419879b375Joseph Wen 1649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project// Characters where we want to continue using existing font run instead of 1659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project// recomputing the best match in the fallback list. 1669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectstatic const uint32_t stickyWhitelist[] = { '!', ',', '-', '.', ':', ';', '?', NBSP, ZWJ, ZWNJ, 1679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project KEYCAP, HYPHEN, NB_HYPHEN }; 1689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectstatic bool isStickyWhitelisted(uint32_t c) { 1709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project for (size_t i = 0; i < sizeof(stickyWhitelist) / sizeof(stickyWhitelist[0]); i++) { 1719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (stickyWhitelist[i] == c) return true; 1729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return false; 1749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project} 1759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectstatic bool isVariationSelector(uint32_t c) { 1779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return (0xFE00 <= c && c <= 0xFE0F) || (0xE0100 <= c && c <= 0xE01EF); 1789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project} 1799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectvoid FontCollection::itemize(const uint16_t *string, size_t string_size, FontStyle style, 1819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project vector<Run>* result) const { 1829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project FontLanguage lang = style.getLanguage(); 1839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int variant = style.getVariant(); 1849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project FontFamily* lastFamily = NULL; 1859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project Run* run = NULL; 1869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (string_size == 0) { 1889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return; 1899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project const uint32_t kEndOfString = 0xFFFFFFFF; 1929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project uint32_t nextCh = 0; 1949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project uint32_t prevCh = 0; 1959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project size_t nextUtf16Pos = 0; 1969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project size_t readLength = 0; 1979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project U16_NEXT(string, readLength, string_size, nextCh); 1989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project do { 2009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project const uint32_t ch = nextCh; 2019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project const size_t utf16Pos = nextUtf16Pos; 2029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project nextUtf16Pos = readLength; 2039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (readLength < string_size) { 2049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project U16_NEXT(string, readLength, string_size, nextCh); 2059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 2069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project nextCh = kEndOfString; 2079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project bool shouldContinueRun = false; 2109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (lastFamily != nullptr) { 2119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (isStickyWhitelisted(ch)) { 2129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Continue using existing font as long as it has coverage and is whitelisted 2139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project shouldContinueRun = lastFamily->getCoverage()->get(ch); 2149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else if (isVariationSelector(ch)) { 2159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Always continue if the character is a variation selector. 2169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project shouldContinueRun = true; 2179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (!shouldContinueRun) { 2219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project FontFamily* family = 2229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project getFamilyForChar(ch, isVariationSelector(nextCh) ? nextCh : 0, lang, variant); 2238451b25a4422656bbd6657a5855e69c0f4d53c74Elliott Hughes if (utf16Pos == 0 || family != lastFamily) { 2249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project size_t start = utf16Pos; 2259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Workaround for Emoji keycap until we implement per-cluster font 2269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // selection: if keycap is found in a different font that also 2279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // supports previous char, attach previous char to the new run. 2289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Only handles non-surrogate characters. 2299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Bug 7557244. 2309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (ch == KEYCAP && utf16Pos != 0 && family && family->getCoverage()->get(prevCh)) { 2319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project run->end--; 2329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (run->start == run->end) { 2339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project result->pop_back(); 2348451b25a4422656bbd6657a5855e69c0f4d53c74Elliott Hughes } 2359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project start--; 2369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project Run dummy; 2389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project result->push_back(dummy); 2399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project run = &result->back(); 2409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (family == NULL) { 2419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project run->fakedFont.font = NULL; 2429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 2439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project run->fakedFont = family->getClosestMatch(style); 2449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project lastFamily = family; 2469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project run->start = start; 2479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project prevCh = ch; 2509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project run->end = nextUtf16Pos; // exclusive 2519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } while (nextCh != kEndOfString); 2529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project} 2539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source ProjectMinikinFont* FontCollection::baseFont(FontStyle style) { 2558451b25a4422656bbd6657a5855e69c0f4d53c74Elliott Hughes return baseFontFaked(style).font; 2569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project} 2579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source ProjectFakedFont FontCollection::baseFontFaked(FontStyle style) { 2599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mFamilies.empty()) { 2609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return FakedFont(); 2619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return mFamilies[0]->getClosestMatch(style); 2639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project} 2649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectuint32_t FontCollection::getId() const { 2669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return mId; 2679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project} 2689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectvoid FontCollection::purgeFontFamilyHbFontCache() const { 2709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project assertMinikinLocked(); 2719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project for (size_t i = 0; i < mFamilies.size(); ++i) { 2728451b25a4422656bbd6657a5855e69c0f4d53c74Elliott Hughes mFamilies[i]->purgeHbFontCache(); 2739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project} 2759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project} // namespace android 2779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project