FontCollection.cpp revision 997c799e3ec6bf8adf687e29670d23d91e0f5fee
19cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien/* 29cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien * Copyright (C) 2013 The Android Open Source Project 39cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien * 49cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien * Licensed under the Apache License, Version 2.0 (the "License"); 59cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien * you may not use this file except in compliance with the License. 69cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien * You may obtain a copy of the License at 79cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien * 89cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien * http://www.apache.org/licenses/LICENSE-2.0 99cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien * 109cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien * Unless required by applicable law or agreed to in writing, software 119cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien * distributed under the License is distributed on an "AS IS" BASIS, 129cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 139cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien * See the License for the specific language governing permissions and 149cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien * limitations under the License. 159cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien */ 169cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 17ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien// #define VERBOSE_DEBUG 18ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien 19ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien#define LOG_TAG "Minikin" 20ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien#include <cutils/log.h> 219cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 22997c799e3ec6bf8adf687e29670d23d91e0f5feeRaph Levien#include "unicode/unistr.h" 23997c799e3ec6bf8adf687e29670d23d91e0f5feeRaph Levien#include "unicode/unorm2.h" 24997c799e3ec6bf8adf687e29670d23d91e0f5feeRaph Levien 25c31e3883456e018d742e9f29815ba5ff8b315ea1Raph Levien#include "MinikinInternal.h" 269cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien#include <minikin/CmapCoverage.h> 279cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien#include <minikin/FontCollection.h> 289cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 299cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levienusing std::vector; 309cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 319cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Leviennamespace android { 329cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 339cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levientemplate <typename T> 349cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levienstatic inline T max(T a, T b) { 359cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien return a>b ? a : b; 369cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien} 379cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 384d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levienuint32_t FontCollection::sNextId = 0; 394d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien 409cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph LevienFontCollection::FontCollection(const vector<FontFamily*>& typefaces) : 419cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien mMaxChar(0) { 42c31e3883456e018d742e9f29815ba5ff8b315ea1Raph Levien AutoMutex _l(gMinikinLock); 434d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien mId = sNextId++; 449cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien vector<uint32_t> lastChar; 459cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien size_t nTypefaces = typefaces.size(); 469cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien#ifdef VERBOSE_DEBUG 47ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien ALOGD("nTypefaces = %d\n", nTypefaces); 489cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien#endif 499cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien const FontStyle defaultStyle; 509cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien for (size_t i = 0; i < nTypefaces; i++) { 519cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien FontFamily* family = typefaces[i]; 529a5f713add8cfb91ac2c9ed5c917309053201ab6Raph Levien MinikinFont* typeface = family->getClosestMatch(defaultStyle).font; 534d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien if (typeface == NULL) { 544d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien continue; 554d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien } 56bd36ec766a451c62ffdd407d5ce1a355e8f7dfd8Raph Levien family->RefLocked(); 57bd36ec766a451c62ffdd407d5ce1a355e8f7dfd8Raph Levien FontInstance dummy; 58bd36ec766a451c62ffdd407d5ce1a355e8f7dfd8Raph Levien mInstances.push_back(dummy); // emplace_back would be better 59bd36ec766a451c62ffdd407d5ce1a355e8f7dfd8Raph Levien FontInstance* instance = &mInstances.back(); 60bd36ec766a451c62ffdd407d5ce1a355e8f7dfd8Raph Levien instance->mFamily = family; 61bd36ec766a451c62ffdd407d5ce1a355e8f7dfd8Raph Levien instance->mCoverage = new SparseBitSet; 629cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien#ifdef VERBOSE_DEBUG 63ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien ALOGD("closest match = %p, family size = %d\n", typeface, family->getNumFonts()); 649cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien#endif 65bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien const uint32_t cmapTag = MinikinFont::MakeTag('c', 'm', 'a', 'p'); 66bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien size_t cmapSize = 0; 67bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien bool ok = typeface->GetTable(cmapTag, NULL, &cmapSize); 689cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien UniquePtr<uint8_t[]> cmapData(new uint8_t[cmapSize]); 69bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien ok = typeface->GetTable(cmapTag, cmapData.get(), &cmapSize); 709cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien CmapCoverage::getCoverage(*instance->mCoverage, cmapData.get(), cmapSize); 719cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien#ifdef VERBOSE_DEBUG 72ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien ALOGD("font coverage length=%d, first ch=%x\n", instance->mCoverage->length(), 739cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien instance->mCoverage->nextSetBit(0)); 749cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien#endif 759cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien mMaxChar = max(mMaxChar, instance->mCoverage->length()); 769cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien lastChar.push_back(instance->mCoverage->nextSetBit(0)); 779cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien } 78bd36ec766a451c62ffdd407d5ce1a355e8f7dfd8Raph Levien nTypefaces = mInstances.size(); 79156acb18f53b32655abb34166ea737e4320ca366Raph Levien LOG_ALWAYS_FATAL_IF(nTypefaces == 0, 80156acb18f53b32655abb34166ea737e4320ca366Raph Levien "Font collection must have at least one valid typeface"); 8172fe9422c869b7878240a23e4650d9d90edb1c2aRaph Levien size_t nPages = (mMaxChar + kPageMask) >> kLogCharsPerPage; 829cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien size_t offset = 0; 839cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien for (size_t i = 0; i < nPages; i++) { 849cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien Range dummy; 859cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien mRanges.push_back(dummy); 869cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien Range* range = &mRanges.back(); 879cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien#ifdef VERBOSE_DEBUG 88ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien ALOGD("i=%d: range start = %d\n", i, offset); 899cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien#endif 909cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien range->start = offset; 919cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien for (size_t j = 0; j < nTypefaces; j++) { 929cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien if (lastChar[j] < (i + 1) << kLogCharsPerPage) { 939cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien const FontInstance* instance = &mInstances[j]; 949cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien mInstanceVec.push_back(instance); 959cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien offset++; 969cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien uint32_t nextChar = instance->mCoverage->nextSetBit((i + 1) << kLogCharsPerPage); 979cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien#ifdef VERBOSE_DEBUG 98ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien ALOGD("nextChar = %d (j = %d)\n", nextChar, j); 999cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien#endif 1009cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien lastChar[j] = nextChar; 1019cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien } 1029cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien } 1039cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien range->end = offset; 1049cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien } 1059cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien} 1069cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 1079cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph LevienFontCollection::~FontCollection() { 1089cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien for (size_t i = 0; i < mInstances.size(); i++) { 1099cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien delete mInstances[i].mCoverage; 110b80c1f19c58b927820a8a24bf2218e5645724608Raph Levien mInstances[i].mFamily->UnrefLocked(); 1119cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien } 1129cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien} 1139cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 1147b221d97b7b64dc5ce457e19666d55d042e22e62Raph Levien// Implement heuristic for choosing best-match font. Here are the rules: 1157b221d97b7b64dc5ce457e19666d55d042e22e62Raph Levien// 1. If first font in the collection has the character, it wins. 1167b221d97b7b64dc5ce457e19666d55d042e22e62Raph Levien// 2. If a font matches both language and script, it gets a score of 4. 1177b221d97b7b64dc5ce457e19666d55d042e22e62Raph Levien// 3. If a font matches just language, it gets a score of 2. 1187b221d97b7b64dc5ce457e19666d55d042e22e62Raph Levien// 4. Matching the "compact" or "elegant" variant adds one to the score. 1197b221d97b7b64dc5ce457e19666d55d042e22e62Raph Levien// 5. Highest score wins, with ties resolved to the first font. 120066e8575af64fb452617ac6005de6ccf6509553bRaph Levienconst FontCollection::FontInstance* FontCollection::getInstanceForChar(uint32_t ch, 121066e8575af64fb452617ac6005de6ccf6509553bRaph Levien FontLanguage lang, int variant) const { 1229cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien if (ch >= mMaxChar) { 1239cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien return NULL; 1249cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien } 1259cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien const Range& range = mRanges[ch >> kLogCharsPerPage]; 1269cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien#ifdef VERBOSE_DEBUG 127ecc2d34ac23a497988f21e5f415b53c007b9d8c5Raph Levien ALOGD("querying range %d:%d\n", range.start, range.end); 1289cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien#endif 129066e8575af64fb452617ac6005de6ccf6509553bRaph Levien const FontInstance* bestInstance = NULL; 1307b221d97b7b64dc5ce457e19666d55d042e22e62Raph Levien int bestScore = -1; 1319cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien for (size_t i = range.start; i < range.end; i++) { 1329cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien const FontInstance* instance = mInstanceVec[i]; 1339cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien if (instance->mCoverage->get(ch)) { 1347b221d97b7b64dc5ce457e19666d55d042e22e62Raph Levien FontFamily* family = instance->mFamily; 1357b221d97b7b64dc5ce457e19666d55d042e22e62Raph Levien // First font family in collection always matches 1367b221d97b7b64dc5ce457e19666d55d042e22e62Raph Levien if (mInstances[0].mFamily == family) { 137066e8575af64fb452617ac6005de6ccf6509553bRaph Levien return instance; 1387b221d97b7b64dc5ce457e19666d55d042e22e62Raph Levien } 1397b221d97b7b64dc5ce457e19666d55d042e22e62Raph Levien int score = lang.match(family->lang()) * 2; 1407b221d97b7b64dc5ce457e19666d55d042e22e62Raph Levien if (variant != 0 && variant == family->variant()) { 1417b221d97b7b64dc5ce457e19666d55d042e22e62Raph Levien score++; 1427b221d97b7b64dc5ce457e19666d55d042e22e62Raph Levien } 1437b221d97b7b64dc5ce457e19666d55d042e22e62Raph Levien if (score > bestScore) { 1447b221d97b7b64dc5ce457e19666d55d042e22e62Raph Levien bestScore = score; 145066e8575af64fb452617ac6005de6ccf6509553bRaph Levien bestInstance = instance; 1467b221d97b7b64dc5ce457e19666d55d042e22e62Raph Levien } 1479cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien } 1489cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien } 149997c799e3ec6bf8adf687e29670d23d91e0f5feeRaph Levien if (bestInstance == NULL && !mInstanceVec.empty()) { 150997c799e3ec6bf8adf687e29670d23d91e0f5feeRaph Levien UErrorCode errorCode = U_ZERO_ERROR; 151997c799e3ec6bf8adf687e29670d23d91e0f5feeRaph Levien const UNormalizer2* normalizer = unorm2_getNFDInstance(&errorCode); 152997c799e3ec6bf8adf687e29670d23d91e0f5feeRaph Levien if (U_SUCCESS(errorCode)) { 153997c799e3ec6bf8adf687e29670d23d91e0f5feeRaph Levien UChar decomposed[4]; 154997c799e3ec6bf8adf687e29670d23d91e0f5feeRaph Levien int len = unorm2_getRawDecomposition(normalizer, ch, decomposed, 4, &errorCode); 155997c799e3ec6bf8adf687e29670d23d91e0f5feeRaph Levien if (U_SUCCESS(errorCode) && len > 0) { 156997c799e3ec6bf8adf687e29670d23d91e0f5feeRaph Levien int off = 0; 157997c799e3ec6bf8adf687e29670d23d91e0f5feeRaph Levien U16_NEXT_UNSAFE(decomposed, off, ch); 158997c799e3ec6bf8adf687e29670d23d91e0f5feeRaph Levien return getInstanceForChar(ch, lang, variant); 159997c799e3ec6bf8adf687e29670d23d91e0f5feeRaph Levien } 160997c799e3ec6bf8adf687e29670d23d91e0f5feeRaph Levien } 161156acb18f53b32655abb34166ea737e4320ca366Raph Levien bestInstance = &mInstances[0]; 162156acb18f53b32655abb34166ea737e4320ca366Raph Levien } 163066e8575af64fb452617ac6005de6ccf6509553bRaph Levien return bestInstance; 1649cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien} 1659cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 166bb601b67dd05947f92cc23092bfb8a059c2e3377Raph Levienconst uint32_t NBSP = 0xa0; 167bb601b67dd05947f92cc23092bfb8a059c2e3377Raph Levienconst uint32_t ZWJ = 0x200c; 168bb601b67dd05947f92cc23092bfb8a059c2e3377Raph Levienconst uint32_t ZWNJ = 0x200d; 169f952161b874fd2e9af474b9fd2ebcca1f3bb4555Behdad Esfahbodconst uint32_t KEYCAP = 0x20e3; 170f952161b874fd2e9af474b9fd2ebcca1f3bb4555Behdad Esfahbod 171bb601b67dd05947f92cc23092bfb8a059c2e3377Raph Levien// Characters where we want to continue using existing font run instead of 172bb601b67dd05947f92cc23092bfb8a059c2e3377Raph Levien// recomputing the best match in the fallback list. 173f952161b874fd2e9af474b9fd2ebcca1f3bb4555Behdad Esfahbodstatic const uint32_t stickyWhitelist[] = { '!', ',', '.', ':', ';', '?', NBSP, ZWJ, ZWNJ, KEYCAP }; 174bb601b67dd05947f92cc23092bfb8a059c2e3377Raph Levien 175bb601b67dd05947f92cc23092bfb8a059c2e3377Raph Levienstatic bool isStickyWhitelisted(uint32_t c) { 176bb601b67dd05947f92cc23092bfb8a059c2e3377Raph Levien for (size_t i = 0; i < sizeof(stickyWhitelist) / sizeof(stickyWhitelist[0]); i++) { 177bb601b67dd05947f92cc23092bfb8a059c2e3377Raph Levien if (stickyWhitelist[i] == c) return true; 178bb601b67dd05947f92cc23092bfb8a059c2e3377Raph Levien } 179bb601b67dd05947f92cc23092bfb8a059c2e3377Raph Levien return false; 180bb601b67dd05947f92cc23092bfb8a059c2e3377Raph Levien} 181bb601b67dd05947f92cc23092bfb8a059c2e3377Raph Levien 1829cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levienvoid FontCollection::itemize(const uint16_t *string, size_t string_size, FontStyle style, 1839cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien vector<Run>* result) const { 1847b221d97b7b64dc5ce457e19666d55d042e22e62Raph Levien FontLanguage lang = style.getLanguage(); 1857b221d97b7b64dc5ce457e19666d55d042e22e62Raph Levien int variant = style.getVariant(); 186066e8575af64fb452617ac6005de6ccf6509553bRaph Levien const FontInstance* lastInstance = NULL; 1879cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien Run* run = NULL; 1889cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien int nShorts; 1899cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien for (size_t i = 0; i < string_size; i += nShorts) { 1909cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien nShorts = 1; 1919cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien uint32_t ch = string[i]; 1929cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien // sigh, decode UTF-16 by hand here 1939cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien if ((ch & 0xfc00) == 0xd800) { 1949cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien if ((i + 1) < string_size) { 1959cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien ch = 0x10000 + ((ch & 0x3ff) << 10) + (string[i + 1] & 0x3ff); 1969cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien nShorts = 2; 1979cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien } 1989cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien } 199bb601b67dd05947f92cc23092bfb8a059c2e3377Raph Levien // Continue using existing font as long as it has coverage and is whitelisted 200bb601b67dd05947f92cc23092bfb8a059c2e3377Raph Levien if (lastInstance == NULL 201bb601b67dd05947f92cc23092bfb8a059c2e3377Raph Levien || !(isStickyWhitelisted(ch) && lastInstance->mCoverage->get(ch))) { 202066e8575af64fb452617ac6005de6ccf6509553bRaph Levien const FontInstance* instance = getInstanceForChar(ch, lang, variant); 203066e8575af64fb452617ac6005de6ccf6509553bRaph Levien if (i == 0 || instance != lastInstance) { 204f952161b874fd2e9af474b9fd2ebcca1f3bb4555Behdad Esfahbod size_t start = i; 205f952161b874fd2e9af474b9fd2ebcca1f3bb4555Behdad Esfahbod // Workaround for Emoji keycap until we implement per-cluster font 206f952161b874fd2e9af474b9fd2ebcca1f3bb4555Behdad Esfahbod // selection: if keycap is found in a different font that also 207f952161b874fd2e9af474b9fd2ebcca1f3bb4555Behdad Esfahbod // supports previous char, attach previous char to the new run. 208f952161b874fd2e9af474b9fd2ebcca1f3bb4555Behdad Esfahbod // Only handles non-surrogate characters. 209f952161b874fd2e9af474b9fd2ebcca1f3bb4555Behdad Esfahbod // Bug 7557244. 210f952161b874fd2e9af474b9fd2ebcca1f3bb4555Behdad Esfahbod if (ch == KEYCAP && i && instance && instance->mCoverage->get(string[i - 1])) { 211f952161b874fd2e9af474b9fd2ebcca1f3bb4555Behdad Esfahbod run->end--; 212f952161b874fd2e9af474b9fd2ebcca1f3bb4555Behdad Esfahbod if (run->start == run->end) { 213f952161b874fd2e9af474b9fd2ebcca1f3bb4555Behdad Esfahbod result->pop_back(); 214f952161b874fd2e9af474b9fd2ebcca1f3bb4555Behdad Esfahbod } 215f952161b874fd2e9af474b9fd2ebcca1f3bb4555Behdad Esfahbod start--; 216f952161b874fd2e9af474b9fd2ebcca1f3bb4555Behdad Esfahbod } 217066e8575af64fb452617ac6005de6ccf6509553bRaph Levien Run dummy; 218066e8575af64fb452617ac6005de6ccf6509553bRaph Levien result->push_back(dummy); 219066e8575af64fb452617ac6005de6ccf6509553bRaph Levien run = &result->back(); 220066e8575af64fb452617ac6005de6ccf6509553bRaph Levien if (instance == NULL) { 2219a5f713add8cfb91ac2c9ed5c917309053201ab6Raph Levien run->fakedFont.font = NULL; 222066e8575af64fb452617ac6005de6ccf6509553bRaph Levien } else { 2239a5f713add8cfb91ac2c9ed5c917309053201ab6Raph Levien run->fakedFont = instance->mFamily->getClosestMatch(style); 224066e8575af64fb452617ac6005de6ccf6509553bRaph Levien } 225066e8575af64fb452617ac6005de6ccf6509553bRaph Levien lastInstance = instance; 226f952161b874fd2e9af474b9fd2ebcca1f3bb4555Behdad Esfahbod run->start = start; 2279cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien } 2289cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien } 2299cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien run->end = i + nShorts; 2309cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien } 2319cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien} 2329cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 23389566f0ada1cafe673efa064cde38467990235d4Raph LevienMinikinFont* FontCollection::baseFont(FontStyle style) { 2349a5f713add8cfb91ac2c9ed5c917309053201ab6Raph Levien return baseFontFaked(style).font; 2359a5f713add8cfb91ac2c9ed5c917309053201ab6Raph Levien} 2369a5f713add8cfb91ac2c9ed5c917309053201ab6Raph Levien 2379a5f713add8cfb91ac2c9ed5c917309053201ab6Raph LevienFakedFont FontCollection::baseFontFaked(FontStyle style) { 23889566f0ada1cafe673efa064cde38467990235d4Raph Levien if (mInstances.empty()) { 2399a5f713add8cfb91ac2c9ed5c917309053201ab6Raph Levien return FakedFont(); 24089566f0ada1cafe673efa064cde38467990235d4Raph Levien } 24189566f0ada1cafe673efa064cde38467990235d4Raph Levien return mInstances[0].mFamily->getClosestMatch(style); 24289566f0ada1cafe673efa064cde38467990235d4Raph Levien} 24389566f0ada1cafe673efa064cde38467990235d4Raph Levien 2444d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levienuint32_t FontCollection::getId() const { 2454d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien return mId; 2464d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien} 2474d4e6bc8118d15542f1f2a9218f0f7a91a29474fRaph Levien 2489cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien} // namespace android 249