FontFamily.cpp revision 6d9dcd2cf3d3ed26a886e02d94c907311e7b1f83
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 179cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien#define LOG_TAG "Minikin" 189cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 194b723bf22b1bbc5fcdaa9bd96178c921199905d5Roozbeh Pournader#include <unordered_set> 204b723bf22b1bbc5fcdaa9bd96178c921199905d5Roozbeh Pournader 219cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien#include <cutils/log.h> 229cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien#include <stdlib.h> 239cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien#include <stdint.h> 244b723bf22b1bbc5fcdaa9bd96178c921199905d5Roozbeh Pournader#include <string.h> 25c31e3883456e018d742e9f29815ba5ff8b315ea1Raph Levien 260f2a025d135f9ca52cc3cf917fffc29d6c126094Seigo Nonaka#include <hb.h> 270f2a025d135f9ca52cc3cf917fffc29d6c126094Seigo Nonaka#include <hb-ot.h> 280f2a025d135f9ca52cc3cf917fffc29d6c126094Seigo Nonaka 296d9dcd2cf3d3ed26a886e02d94c907311e7b1f83Seigo Nonaka#include <utils/JenkinsHash.h> 306d9dcd2cf3d3ed26a886e02d94c907311e7b1f83Seigo Nonaka 316d9dcd2cf3d3ed26a886e02d94c907311e7b1f83Seigo Nonaka#include "FontLanguageListCache.h" 320f2a025d135f9ca52cc3cf917fffc29d6c126094Seigo Nonaka#include "HbFaceCache.h" 33c31e3883456e018d742e9f29815ba5ff8b315ea1Raph Levien#include "MinikinInternal.h" 34bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien#include <minikin/MinikinFont.h> 359cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien#include <minikin/AnalyzeStyle.h> 3613f1aae02bacd475722bc8ea3fc2cf6abc1a82e3Raph Levien#include <minikin/CmapCoverage.h> 379cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien#include <minikin/FontFamily.h> 381279a3bf5ec6131efefbc51d52d24850fd81f676Kenny Root#include <UniquePtr.h> 399cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 409cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levienusing std::vector; 419cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 429cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Leviennamespace android { 439cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 447b221d97b7b64dc5ce457e19666d55d042e22e62Raph Levien// Parse bcp-47 language identifier into internal structure 457b221d97b7b64dc5ce457e19666d55d042e22e62Raph LevienFontLanguage::FontLanguage(const char* buf, size_t size) { 467b221d97b7b64dc5ce457e19666d55d042e22e62Raph Levien uint32_t bits = 0; 477b221d97b7b64dc5ce457e19666d55d042e22e62Raph Levien size_t i; 48a5bb91190edbea0be0e78a8511b3c920b6e99c4eBehdad Esfahbod for (i = 0; i < size; i++) { 497b221d97b7b64dc5ce457e19666d55d042e22e62Raph Levien uint16_t c = buf[i]; 507b221d97b7b64dc5ce457e19666d55d042e22e62Raph Levien if (c == '-' || c == '_') break; 517b221d97b7b64dc5ce457e19666d55d042e22e62Raph Levien } 527b221d97b7b64dc5ce457e19666d55d042e22e62Raph Levien if (i == 2) { 5371ec97055357b6ccb13a2697a56254bb19f43ae9Roozbeh Pournader bits = uint8_t(buf[0]) | (uint8_t(buf[1]) << 8); 5471ec97055357b6ccb13a2697a56254bb19f43ae9Roozbeh Pournader } else if (i == 3) { 5571ec97055357b6ccb13a2697a56254bb19f43ae9Roozbeh Pournader bits = uint8_t(buf[0]) | (uint8_t(buf[1]) << 8) | (uint8_t(buf[2]) << 16); 5671ec97055357b6ccb13a2697a56254bb19f43ae9Roozbeh Pournader } else { 5771ec97055357b6ccb13a2697a56254bb19f43ae9Roozbeh Pournader mBits = kUnsupportedLanguage; 5871ec97055357b6ccb13a2697a56254bb19f43ae9Roozbeh Pournader // We don't understand anything other than two-letter or three-letter 5971ec97055357b6ccb13a2697a56254bb19f43ae9Roozbeh Pournader // language codes, so we skip parsing the rest of the string. 6071ec97055357b6ccb13a2697a56254bb19f43ae9Roozbeh Pournader return; 617b221d97b7b64dc5ce457e19666d55d042e22e62Raph Levien } 627b221d97b7b64dc5ce457e19666d55d042e22e62Raph Levien size_t next; 637b221d97b7b64dc5ce457e19666d55d042e22e62Raph Levien for (i++; i < size; i = next + 1) { 647b221d97b7b64dc5ce457e19666d55d042e22e62Raph Levien for (next = i; next < size; next++) { 657b221d97b7b64dc5ce457e19666d55d042e22e62Raph Levien uint16_t c = buf[next]; 667b221d97b7b64dc5ce457e19666d55d042e22e62Raph Levien if (c == '-' || c == '_') break; 677b221d97b7b64dc5ce457e19666d55d042e22e62Raph Levien } 68369d2d44cb09ac4346cdd9e3b131bb173d764f88Seigo Nonaka if (next - i == 4) { 69369d2d44cb09ac4346cdd9e3b131bb173d764f88Seigo Nonaka if (buf[i] == 'H' && buf[i+1] == 'a' && buf[i+2] == 'n') { 70369d2d44cb09ac4346cdd9e3b131bb173d764f88Seigo Nonaka if (buf[i+3] == 's') { 71369d2d44cb09ac4346cdd9e3b131bb173d764f88Seigo Nonaka bits |= kHansFlag; 72369d2d44cb09ac4346cdd9e3b131bb173d764f88Seigo Nonaka } else if (buf[i+3] == 't') { 73369d2d44cb09ac4346cdd9e3b131bb173d764f88Seigo Nonaka bits |= kHantFlag; 74369d2d44cb09ac4346cdd9e3b131bb173d764f88Seigo Nonaka } 75369d2d44cb09ac4346cdd9e3b131bb173d764f88Seigo Nonaka } else if (buf[i] == 'Q' && buf[i+1] == 'a' && buf[i+2] == 'a'&& buf[i+3] == 'e') { 76369d2d44cb09ac4346cdd9e3b131bb173d764f88Seigo Nonaka bits |= kEmojiFlag; 777b221d97b7b64dc5ce457e19666d55d042e22e62Raph Levien } 787b221d97b7b64dc5ce457e19666d55d042e22e62Raph Levien } 797b221d97b7b64dc5ce457e19666d55d042e22e62Raph Levien // TODO: this might be a good place to infer script from country (zh_TW -> Hant), 807b221d97b7b64dc5ce457e19666d55d042e22e62Raph Levien // but perhaps it's up to the client to do that, before passing a string. 817b221d97b7b64dc5ce457e19666d55d042e22e62Raph Levien } 827b221d97b7b64dc5ce457e19666d55d042e22e62Raph Levien mBits = bits; 837b221d97b7b64dc5ce457e19666d55d042e22e62Raph Levien} 847b221d97b7b64dc5ce457e19666d55d042e22e62Raph Levien 85a5bb91190edbea0be0e78a8511b3c920b6e99c4eBehdad Esfahbodstd::string FontLanguage::getString() const { 8671ec97055357b6ccb13a2697a56254bb19f43ae9Roozbeh Pournader if (mBits == kUnsupportedLanguage) { 8771ec97055357b6ccb13a2697a56254bb19f43ae9Roozbeh Pournader return "und"; 8871ec97055357b6ccb13a2697a56254bb19f43ae9Roozbeh Pournader } 8971ec97055357b6ccb13a2697a56254bb19f43ae9Roozbeh Pournader char buf[16]; 9071ec97055357b6ccb13a2697a56254bb19f43ae9Roozbeh Pournader size_t i = 0; 9171ec97055357b6ccb13a2697a56254bb19f43ae9Roozbeh Pournader if (mBits & kBaseLangMask) { 9271ec97055357b6ccb13a2697a56254bb19f43ae9Roozbeh Pournader buf[i++] = mBits & 0xFFu; 9371ec97055357b6ccb13a2697a56254bb19f43ae9Roozbeh Pournader buf[i++] = (mBits >> 8) & 0xFFu; 9471ec97055357b6ccb13a2697a56254bb19f43ae9Roozbeh Pournader char third_letter = (mBits >> 16) & 0xFFu; 9571ec97055357b6ccb13a2697a56254bb19f43ae9Roozbeh Pournader if (third_letter != 0) buf[i++] = third_letter; 9671ec97055357b6ccb13a2697a56254bb19f43ae9Roozbeh Pournader } 9771ec97055357b6ccb13a2697a56254bb19f43ae9Roozbeh Pournader if (mBits & kScriptMask) { 9871ec97055357b6ccb13a2697a56254bb19f43ae9Roozbeh Pournader if (!i) { 9971ec97055357b6ccb13a2697a56254bb19f43ae9Roozbeh Pournader // This should not happen, but as it apparently has, we fill the language code part 10071ec97055357b6ccb13a2697a56254bb19f43ae9Roozbeh Pournader // with "und". 10171ec97055357b6ccb13a2697a56254bb19f43ae9Roozbeh Pournader buf[i++] = 'u'; 10271ec97055357b6ccb13a2697a56254bb19f43ae9Roozbeh Pournader buf[i++] = 'n'; 10371ec97055357b6ccb13a2697a56254bb19f43ae9Roozbeh Pournader buf[i++] = 'd'; 10471ec97055357b6ccb13a2697a56254bb19f43ae9Roozbeh Pournader } 10571ec97055357b6ccb13a2697a56254bb19f43ae9Roozbeh Pournader buf[i++] = '-'; 106369d2d44cb09ac4346cdd9e3b131bb173d764f88Seigo Nonaka if (mBits & kEmojiFlag) { 107369d2d44cb09ac4346cdd9e3b131bb173d764f88Seigo Nonaka buf[i++] = 'Q'; 108369d2d44cb09ac4346cdd9e3b131bb173d764f88Seigo Nonaka buf[i++] = 'a'; 109369d2d44cb09ac4346cdd9e3b131bb173d764f88Seigo Nonaka buf[i++] = 'a'; 110369d2d44cb09ac4346cdd9e3b131bb173d764f88Seigo Nonaka buf[i++] = 'e'; 111369d2d44cb09ac4346cdd9e3b131bb173d764f88Seigo Nonaka } else { 112369d2d44cb09ac4346cdd9e3b131bb173d764f88Seigo Nonaka buf[i++] = 'H'; 113369d2d44cb09ac4346cdd9e3b131bb173d764f88Seigo Nonaka buf[i++] = 'a'; 114369d2d44cb09ac4346cdd9e3b131bb173d764f88Seigo Nonaka buf[i++] = 'n'; 115369d2d44cb09ac4346cdd9e3b131bb173d764f88Seigo Nonaka buf[i++] = (mBits & kHansFlag) ? 's' : 't'; 116369d2d44cb09ac4346cdd9e3b131bb173d764f88Seigo Nonaka } 11771ec97055357b6ccb13a2697a56254bb19f43ae9Roozbeh Pournader } 11871ec97055357b6ccb13a2697a56254bb19f43ae9Roozbeh Pournader return std::string(buf, i); 119a5bb91190edbea0be0e78a8511b3c920b6e99c4eBehdad Esfahbod} 120a5bb91190edbea0be0e78a8511b3c920b6e99c4eBehdad Esfahbod 1217b221d97b7b64dc5ce457e19666d55d042e22e62Raph Levienint FontLanguage::match(const FontLanguage other) const { 12271ec97055357b6ccb13a2697a56254bb19f43ae9Roozbeh Pournader if (mBits == kUnsupportedLanguage || other.mBits == kUnsupportedLanguage) 12371ec97055357b6ccb13a2697a56254bb19f43ae9Roozbeh Pournader return 0; 12471ec97055357b6ccb13a2697a56254bb19f43ae9Roozbeh Pournader 1257b221d97b7b64dc5ce457e19666d55d042e22e62Raph Levien int result = 0; 1267b221d97b7b64dc5ce457e19666d55d042e22e62Raph Levien if ((mBits & kBaseLangMask) == (other.mBits & kBaseLangMask)) { 1277b221d97b7b64dc5ce457e19666d55d042e22e62Raph Levien result++; 1287b221d97b7b64dc5ce457e19666d55d042e22e62Raph Levien if ((mBits & kScriptMask) != 0 && (mBits & kScriptMask) == (other.mBits & kScriptMask)) { 1297b221d97b7b64dc5ce457e19666d55d042e22e62Raph Levien result++; 1307b221d97b7b64dc5ce457e19666d55d042e22e62Raph Levien } 1317b221d97b7b64dc5ce457e19666d55d042e22e62Raph Levien } 1327b221d97b7b64dc5ce457e19666d55d042e22e62Raph Levien return result; 1337b221d97b7b64dc5ce457e19666d55d042e22e62Raph Levien} 1347b221d97b7b64dc5ce457e19666d55d042e22e62Raph Levien 1354b723bf22b1bbc5fcdaa9bd96178c921199905d5Roozbeh PournaderFontLanguages::FontLanguages(const char* buf, size_t size) { 1364b723bf22b1bbc5fcdaa9bd96178c921199905d5Roozbeh Pournader std::unordered_set<uint32_t> seen; 1374b723bf22b1bbc5fcdaa9bd96178c921199905d5Roozbeh Pournader mLangs.clear(); 1384b723bf22b1bbc5fcdaa9bd96178c921199905d5Roozbeh Pournader const char* bufEnd = buf + size; 1394b723bf22b1bbc5fcdaa9bd96178c921199905d5Roozbeh Pournader const char* lastStart = buf; 1404b723bf22b1bbc5fcdaa9bd96178c921199905d5Roozbeh Pournader bool isLastLang = false; 1414b723bf22b1bbc5fcdaa9bd96178c921199905d5Roozbeh Pournader while (true) { 1424b723bf22b1bbc5fcdaa9bd96178c921199905d5Roozbeh Pournader const char* commaLoc = static_cast<const char*>( 1434b723bf22b1bbc5fcdaa9bd96178c921199905d5Roozbeh Pournader memchr(lastStart, ',', bufEnd - lastStart)); 1444b723bf22b1bbc5fcdaa9bd96178c921199905d5Roozbeh Pournader if (commaLoc == NULL) { 1454b723bf22b1bbc5fcdaa9bd96178c921199905d5Roozbeh Pournader commaLoc = bufEnd; 1464b723bf22b1bbc5fcdaa9bd96178c921199905d5Roozbeh Pournader isLastLang = true; 1474b723bf22b1bbc5fcdaa9bd96178c921199905d5Roozbeh Pournader } 1484b723bf22b1bbc5fcdaa9bd96178c921199905d5Roozbeh Pournader FontLanguage lang(lastStart, commaLoc - lastStart); 1494b723bf22b1bbc5fcdaa9bd96178c921199905d5Roozbeh Pournader if (isLastLang && mLangs.size() == 0) { 1504b723bf22b1bbc5fcdaa9bd96178c921199905d5Roozbeh Pournader // Make sure the list has at least one member 1514b723bf22b1bbc5fcdaa9bd96178c921199905d5Roozbeh Pournader mLangs.push_back(lang); 1524b723bf22b1bbc5fcdaa9bd96178c921199905d5Roozbeh Pournader return; 1534b723bf22b1bbc5fcdaa9bd96178c921199905d5Roozbeh Pournader } 1544b723bf22b1bbc5fcdaa9bd96178c921199905d5Roozbeh Pournader uint32_t bits = lang.bits(); 1554b723bf22b1bbc5fcdaa9bd96178c921199905d5Roozbeh Pournader if (bits != FontLanguage::kUnsupportedLanguage && seen.count(bits) == 0) { 1564b723bf22b1bbc5fcdaa9bd96178c921199905d5Roozbeh Pournader mLangs.push_back(lang); 1574b723bf22b1bbc5fcdaa9bd96178c921199905d5Roozbeh Pournader if (isLastLang) return; 1584b723bf22b1bbc5fcdaa9bd96178c921199905d5Roozbeh Pournader seen.insert(bits); 1594b723bf22b1bbc5fcdaa9bd96178c921199905d5Roozbeh Pournader } 1604b723bf22b1bbc5fcdaa9bd96178c921199905d5Roozbeh Pournader if (isLastLang) return; 1614b723bf22b1bbc5fcdaa9bd96178c921199905d5Roozbeh Pournader lastStart = commaLoc + 1; 1624b723bf22b1bbc5fcdaa9bd96178c921199905d5Roozbeh Pournader } 1634b723bf22b1bbc5fcdaa9bd96178c921199905d5Roozbeh Pournader} 1644b723bf22b1bbc5fcdaa9bd96178c921199905d5Roozbeh Pournader 1656d9dcd2cf3d3ed26a886e02d94c907311e7b1f83Seigo NonakaFontStyle::FontStyle(int variant, int weight, bool italic) 1666d9dcd2cf3d3ed26a886e02d94c907311e7b1f83Seigo Nonaka : FontStyle(FontLanguageListCache::kEmptyListId, variant, weight, italic) { 1676d9dcd2cf3d3ed26a886e02d94c907311e7b1f83Seigo Nonaka} 1686d9dcd2cf3d3ed26a886e02d94c907311e7b1f83Seigo Nonaka 1696d9dcd2cf3d3ed26a886e02d94c907311e7b1f83Seigo NonakaFontStyle::FontStyle(uint32_t languageListId, int variant, int weight, bool italic) 1706d9dcd2cf3d3ed26a886e02d94c907311e7b1f83Seigo Nonaka : bits(pack(variant, weight, italic)), mLanguageListId(languageListId) { 1716d9dcd2cf3d3ed26a886e02d94c907311e7b1f83Seigo Nonaka} 1726d9dcd2cf3d3ed26a886e02d94c907311e7b1f83Seigo Nonaka 1736d9dcd2cf3d3ed26a886e02d94c907311e7b1f83Seigo Nonakahash_t FontStyle::hash() const { 1746d9dcd2cf3d3ed26a886e02d94c907311e7b1f83Seigo Nonaka uint32_t hash = JenkinsHashMix(0, bits); 1756d9dcd2cf3d3ed26a886e02d94c907311e7b1f83Seigo Nonaka hash = JenkinsHashMix(hash, mLanguageListId); 1766d9dcd2cf3d3ed26a886e02d94c907311e7b1f83Seigo Nonaka return JenkinsHashWhiten(hash); 1776d9dcd2cf3d3ed26a886e02d94c907311e7b1f83Seigo Nonaka} 1786d9dcd2cf3d3ed26a886e02d94c907311e7b1f83Seigo Nonaka 1796d9dcd2cf3d3ed26a886e02d94c907311e7b1f83Seigo Nonaka// static 1806d9dcd2cf3d3ed26a886e02d94c907311e7b1f83Seigo Nonakauint32_t FontStyle::registerLanguageList(const std::string& languages) { 1816d9dcd2cf3d3ed26a886e02d94c907311e7b1f83Seigo Nonaka AutoMutex _l(gMinikinLock); 1826d9dcd2cf3d3ed26a886e02d94c907311e7b1f83Seigo Nonaka return FontLanguageListCache::getId(languages); 1836d9dcd2cf3d3ed26a886e02d94c907311e7b1f83Seigo Nonaka} 1846d9dcd2cf3d3ed26a886e02d94c907311e7b1f83Seigo Nonaka 1856d9dcd2cf3d3ed26a886e02d94c907311e7b1f83Seigo Nonaka// static 1866d9dcd2cf3d3ed26a886e02d94c907311e7b1f83Seigo Nonakauint32_t FontStyle::pack(int variant, int weight, bool italic) { 1876d9dcd2cf3d3ed26a886e02d94c907311e7b1f83Seigo Nonaka return (weight & kWeightMask) | (italic ? kItalicMask : 0) | (variant << kVariantShift); 1886d9dcd2cf3d3ed26a886e02d94c907311e7b1f83Seigo Nonaka} 1896d9dcd2cf3d3ed26a886e02d94c907311e7b1f83Seigo Nonaka 190b80c1f19c58b927820a8a24bf2218e5645724608Raph LevienFontFamily::~FontFamily() { 191b80c1f19c58b927820a8a24bf2218e5645724608Raph Levien for (size_t i = 0; i < mFonts.size(); i++) { 192b80c1f19c58b927820a8a24bf2218e5645724608Raph Levien mFonts[i].typeface->UnrefLocked(); 193b80c1f19c58b927820a8a24bf2218e5645724608Raph Levien } 194b80c1f19c58b927820a8a24bf2218e5645724608Raph Levien} 195b80c1f19c58b927820a8a24bf2218e5645724608Raph Levien 196bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levienbool FontFamily::addFont(MinikinFont* typeface) { 197c31e3883456e018d742e9f29815ba5ff8b315ea1Raph Levien AutoMutex _l(gMinikinLock); 198bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien const uint32_t os2Tag = MinikinFont::MakeTag('O', 'S', '/', '2'); 199bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien size_t os2Size = 0; 200bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien bool ok = typeface->GetTable(os2Tag, NULL, &os2Size); 201bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien if (!ok) return false; 2029cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien UniquePtr<uint8_t[]> os2Data(new uint8_t[os2Size]); 203bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien ok = typeface->GetTable(os2Tag, os2Data.get(), &os2Size); 204bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levien if (!ok) return false; 2059cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien int weight; 2069cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien bool italic; 2079cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien if (analyzeStyle(os2Data.get(), os2Size, &weight, &italic)) { 2089cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien //ALOGD("analyzed weight = %d, italic = %s", weight, italic ? "true" : "false"); 2099cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien FontStyle style(weight, italic); 210c31e3883456e018d742e9f29815ba5ff8b315ea1Raph Levien addFontLocked(typeface, style); 2119cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien return true; 2129cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien } else { 2139cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien ALOGD("failed to analyze style"); 2149cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien } 2159cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien return false; 2169cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien} 2179cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 218bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph Levienvoid FontFamily::addFont(MinikinFont* typeface, FontStyle style) { 219c31e3883456e018d742e9f29815ba5ff8b315ea1Raph Levien AutoMutex _l(gMinikinLock); 220c31e3883456e018d742e9f29815ba5ff8b315ea1Raph Levien addFontLocked(typeface, style); 221c31e3883456e018d742e9f29815ba5ff8b315ea1Raph Levien} 222c31e3883456e018d742e9f29815ba5ff8b315ea1Raph Levien 223c31e3883456e018d742e9f29815ba5ff8b315ea1Raph Levienvoid FontFamily::addFontLocked(MinikinFont* typeface, FontStyle style) { typeface->RefLocked(); 2249cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien mFonts.push_back(Font(typeface, style)); 22513f1aae02bacd475722bc8ea3fc2cf6abc1a82e3Raph Levien mCoverageValid = false; 2269cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien} 2279cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 2289cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien// Compute a matching metric between two styles - 0 is an exact match 2299a5f713add8cfb91ac2c9ed5c917309053201ab6Raph Levienstatic int computeMatch(FontStyle style1, FontStyle style2) { 2309cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien if (style1 == style2) return 0; 2319cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien int score = abs(style1.getWeight() - style2.getWeight()); 2329cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien if (style1.getItalic() != style2.getItalic()) { 2339cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien score += 2; 2349cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien } 2359cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien return score; 2369cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien} 2379cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 2389a5f713add8cfb91ac2c9ed5c917309053201ab6Raph Levienstatic FontFakery computeFakery(FontStyle wanted, FontStyle actual) { 239d5804e3937a961736e5cef0e8a70eacf91ee00bbRaph Levien // If desired weight is semibold or darker, and 2 or more grades 240d5804e3937a961736e5cef0e8a70eacf91ee00bbRaph Levien // higher than actual (for example, medium 500 -> bold 700), then 241d5804e3937a961736e5cef0e8a70eacf91ee00bbRaph Levien // select fake bold. 2429f9f3b1ef40f7358dca6acd9dfef686cedefb6aaRaph Levien int wantedWeight = wanted.getWeight(); 243d5804e3937a961736e5cef0e8a70eacf91ee00bbRaph Levien bool isFakeBold = wantedWeight >= 6 && (wantedWeight - actual.getWeight()) >= 2; 2449a5f713add8cfb91ac2c9ed5c917309053201ab6Raph Levien bool isFakeItalic = wanted.getItalic() && !actual.getItalic(); 2459a5f713add8cfb91ac2c9ed5c917309053201ab6Raph Levien return FontFakery(isFakeBold, isFakeItalic); 2469a5f713add8cfb91ac2c9ed5c917309053201ab6Raph Levien} 2479a5f713add8cfb91ac2c9ed5c917309053201ab6Raph Levien 2489a5f713add8cfb91ac2c9ed5c917309053201ab6Raph LevienFakedFont FontFamily::getClosestMatch(FontStyle style) const { 2499cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien const Font* bestFont = NULL; 2509cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien int bestMatch = 0; 2519cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien for (size_t i = 0; i < mFonts.size(); i++) { 2529cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien const Font& font = mFonts[i]; 2539cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien int match = computeMatch(font.style, style); 2549cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien if (i == 0 || match < bestMatch) { 2559cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien bestFont = &font; 2569cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien bestMatch = match; 2579cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien } 2589cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien } 2599a5f713add8cfb91ac2c9ed5c917309053201ab6Raph Levien FakedFont result; 2609a5f713add8cfb91ac2c9ed5c917309053201ab6Raph Levien if (bestFont == NULL) { 2619a5f713add8cfb91ac2c9ed5c917309053201ab6Raph Levien result.font = NULL; 2629a5f713add8cfb91ac2c9ed5c917309053201ab6Raph Levien } else { 2639a5f713add8cfb91ac2c9ed5c917309053201ab6Raph Levien result.font = bestFont->typeface; 2649a5f713add8cfb91ac2c9ed5c917309053201ab6Raph Levien result.fakery = computeFakery(style, bestFont->style); 2659a5f713add8cfb91ac2c9ed5c917309053201ab6Raph Levien } 2669a5f713add8cfb91ac2c9ed5c917309053201ab6Raph Levien return result; 2679cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien} 2689cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 2699cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Leviensize_t FontFamily::getNumFonts() const { 2709cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien return mFonts.size(); 2719cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien} 2729cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 273bcc3dc5a2591a95a57e379e27cbad69c18e91e67Raph LevienMinikinFont* FontFamily::getFont(size_t index) const { 2749cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien return mFonts[index].typeface; 2759cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien} 2769cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 2779cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph LevienFontStyle FontFamily::getStyle(size_t index) const { 2789cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien return mFonts[index].style; 2799cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien} 2809cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien 28113f1aae02bacd475722bc8ea3fc2cf6abc1a82e3Raph Levienconst SparseBitSet* FontFamily::getCoverage() { 28213f1aae02bacd475722bc8ea3fc2cf6abc1a82e3Raph Levien if (!mCoverageValid) { 28313f1aae02bacd475722bc8ea3fc2cf6abc1a82e3Raph Levien const FontStyle defaultStyle; 28413f1aae02bacd475722bc8ea3fc2cf6abc1a82e3Raph Levien MinikinFont* typeface = getClosestMatch(defaultStyle).font; 28513f1aae02bacd475722bc8ea3fc2cf6abc1a82e3Raph Levien const uint32_t cmapTag = MinikinFont::MakeTag('c', 'm', 'a', 'p'); 28613f1aae02bacd475722bc8ea3fc2cf6abc1a82e3Raph Levien size_t cmapSize = 0; 287cb20a2f0b366bfc16db3a489a60156dec7a9fe21Andreas Gampe if (!typeface->GetTable(cmapTag, NULL, &cmapSize)) { 288cb20a2f0b366bfc16db3a489a60156dec7a9fe21Andreas Gampe ALOGE("Could not get cmap table size!\n"); 289cb20a2f0b366bfc16db3a489a60156dec7a9fe21Andreas Gampe // Note: This means we will retry on the next call to getCoverage, as we can't store 290cb20a2f0b366bfc16db3a489a60156dec7a9fe21Andreas Gampe // the failure. This is fine, as we assume this doesn't really happen in practice. 291cb20a2f0b366bfc16db3a489a60156dec7a9fe21Andreas Gampe return nullptr; 292cb20a2f0b366bfc16db3a489a60156dec7a9fe21Andreas Gampe } 29313f1aae02bacd475722bc8ea3fc2cf6abc1a82e3Raph Levien UniquePtr<uint8_t[]> cmapData(new uint8_t[cmapSize]); 294cb20a2f0b366bfc16db3a489a60156dec7a9fe21Andreas Gampe if (!typeface->GetTable(cmapTag, cmapData.get(), &cmapSize)) { 295cb20a2f0b366bfc16db3a489a60156dec7a9fe21Andreas Gampe ALOGE("Unexpected failure to read cmap table!\n"); 296cb20a2f0b366bfc16db3a489a60156dec7a9fe21Andreas Gampe return nullptr; 297cb20a2f0b366bfc16db3a489a60156dec7a9fe21Andreas Gampe } 298cb20a2f0b366bfc16db3a489a60156dec7a9fe21Andreas Gampe CmapCoverage::getCoverage(mCoverage, cmapData.get(), cmapSize); // TODO: Error check? 29913f1aae02bacd475722bc8ea3fc2cf6abc1a82e3Raph Levien#ifdef VERBOSE_DEBUG 300bae347682989d2627081310129a5b60541ed6ad0Seigo Nonaka ALOGD("font coverage length=%d, first ch=%x\n", mCoverage.length(), 301bae347682989d2627081310129a5b60541ed6ad0Seigo Nonaka mCoverage.nextSetBit(0)); 30213f1aae02bacd475722bc8ea3fc2cf6abc1a82e3Raph Levien#endif 30313f1aae02bacd475722bc8ea3fc2cf6abc1a82e3Raph Levien mCoverageValid = true; 30413f1aae02bacd475722bc8ea3fc2cf6abc1a82e3Raph Levien } 30513f1aae02bacd475722bc8ea3fc2cf6abc1a82e3Raph Levien return &mCoverage; 30613f1aae02bacd475722bc8ea3fc2cf6abc1a82e3Raph Levien} 30713f1aae02bacd475722bc8ea3fc2cf6abc1a82e3Raph Levien 3080f2a025d135f9ca52cc3cf917fffc29d6c126094Seigo Nonakabool FontFamily::hasVariationSelector(uint32_t codepoint, uint32_t variationSelector) { 3090f2a025d135f9ca52cc3cf917fffc29d6c126094Seigo Nonaka assertMinikinLocked(); 3100f2a025d135f9ca52cc3cf917fffc29d6c126094Seigo Nonaka if (!mHbFont) { 3110f2a025d135f9ca52cc3cf917fffc29d6c126094Seigo Nonaka const FontStyle defaultStyle; 3120f2a025d135f9ca52cc3cf917fffc29d6c126094Seigo Nonaka MinikinFont* minikinFont = getClosestMatch(defaultStyle).font; 3130f2a025d135f9ca52cc3cf917fffc29d6c126094Seigo Nonaka hb_face_t* face = getHbFaceLocked(minikinFont); 3140f2a025d135f9ca52cc3cf917fffc29d6c126094Seigo Nonaka mHbFont = hb_font_create(face); 3150f2a025d135f9ca52cc3cf917fffc29d6c126094Seigo Nonaka hb_ot_font_set_funcs(mHbFont); 3160f2a025d135f9ca52cc3cf917fffc29d6c126094Seigo Nonaka } 3170f2a025d135f9ca52cc3cf917fffc29d6c126094Seigo Nonaka uint32_t unusedGlyph; 3180f2a025d135f9ca52cc3cf917fffc29d6c126094Seigo Nonaka return hb_font_get_glyph(mHbFont, codepoint, variationSelector, &unusedGlyph); 3190f2a025d135f9ca52cc3cf917fffc29d6c126094Seigo Nonaka} 3200f2a025d135f9ca52cc3cf917fffc29d6c126094Seigo Nonaka 3210f2a025d135f9ca52cc3cf917fffc29d6c126094Seigo Nonakavoid FontFamily::purgeHbFontCache() { 3220f2a025d135f9ca52cc3cf917fffc29d6c126094Seigo Nonaka assertMinikinLocked(); 3230f2a025d135f9ca52cc3cf917fffc29d6c126094Seigo Nonaka if (mHbFont) { 3240f2a025d135f9ca52cc3cf917fffc29d6c126094Seigo Nonaka hb_font_destroy(mHbFont); 3250f2a025d135f9ca52cc3cf917fffc29d6c126094Seigo Nonaka mHbFont = nullptr; 3260f2a025d135f9ca52cc3cf917fffc29d6c126094Seigo Nonaka } 3270f2a025d135f9ca52cc3cf917fffc29d6c126094Seigo Nonaka} 3280f2a025d135f9ca52cc3cf917fffc29d6c126094Seigo Nonaka 3299cc9bbe1461f359f0b27c5e7645c17dda001ab1dRaph Levien} // namespace android 330