FontFamily.cpp revision 6b1c227da6492a435f0341d7fe95d9992669920e
123b797ab5151eb2474f3bdd679f2f07bfd723042John Reck/* 223b797ab5151eb2474f3bdd679f2f07bfd723042John Reck * Copyright (C) 2013 The Android Open Source Project 323b797ab5151eb2474f3bdd679f2f07bfd723042John Reck * 423b797ab5151eb2474f3bdd679f2f07bfd723042John Reck * Licensed under the Apache License, Version 2.0 (the "License"); 523b797ab5151eb2474f3bdd679f2f07bfd723042John Reck * you may not use this file except in compliance with the License. 623b797ab5151eb2474f3bdd679f2f07bfd723042John Reck * You may obtain a copy of the License at 723b797ab5151eb2474f3bdd679f2f07bfd723042John Reck * 823b797ab5151eb2474f3bdd679f2f07bfd723042John Reck * http://www.apache.org/licenses/LICENSE-2.0 923b797ab5151eb2474f3bdd679f2f07bfd723042John Reck * 1023b797ab5151eb2474f3bdd679f2f07bfd723042John Reck * Unless required by applicable law or agreed to in writing, software 1123b797ab5151eb2474f3bdd679f2f07bfd723042John Reck * distributed under the License is distributed on an "AS IS" BASIS, 1223b797ab5151eb2474f3bdd679f2f07bfd723042John Reck * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 1323b797ab5151eb2474f3bdd679f2f07bfd723042John Reck * See the License for the specific language governing permissions and 1423b797ab5151eb2474f3bdd679f2f07bfd723042John Reck * limitations under the License. 1523b797ab5151eb2474f3bdd679f2f07bfd723042John Reck */ 1623b797ab5151eb2474f3bdd679f2f07bfd723042John Reck 1723b797ab5151eb2474f3bdd679f2f07bfd723042John Reck#define LOG_TAG "Minikin" 1823b797ab5151eb2474f3bdd679f2f07bfd723042John Reck 19d04794a9a3f9edc8b7ca336175d66eb81a8f55faJohn Reck#include <cutils/log.h> 20d04794a9a3f9edc8b7ca336175d66eb81a8f55faJohn Reck#include <stdlib.h> 21d04794a9a3f9edc8b7ca336175d66eb81a8f55faJohn Reck#include <stdint.h> 223b20251a355c88193c439f928a84ae69483fb488John Reck#include <string.h> 23d04794a9a3f9edc8b7ca336175d66eb81a8f55faJohn Reck 24d04794a9a3f9edc8b7ca336175d66eb81a8f55faJohn Reck#include <hb.h> 25d04794a9a3f9edc8b7ca336175d66eb81a8f55faJohn Reck#include <hb-ot.h> 264f02bf4eef6af47f35c70c4dda5b7b9523d89ca0John Reck 27d04794a9a3f9edc8b7ca336175d66eb81a8f55faJohn Reck#include <utils/JenkinsHash.h> 28d04794a9a3f9edc8b7ca336175d66eb81a8f55faJohn Reck 2923b797ab5151eb2474f3bdd679f2f07bfd723042John Reck#include "FontLanguage.h" 3065fe5eeb19e2e15c8b1ee91e8a2dcf0c25e48ca6Chris Craik#include "FontLanguageListCache.h" 31d04794a9a3f9edc8b7ca336175d66eb81a8f55faJohn Reck#include "HbFontCache.h" 32240ff6246a29602539fd0295274e1c769e743a2eJohn Reck#include "MinikinInternal.h" 3365fe5eeb19e2e15c8b1ee91e8a2dcf0c25e48ca6Chris Craik#include <minikin/MinikinFont.h> 3465fe5eeb19e2e15c8b1ee91e8a2dcf0c25e48ca6Chris Craik#include <minikin/AnalyzeStyle.h> 35f47a594f5250b1914c36423ee6b371f0b8db09d0John Reck#include <minikin/CmapCoverage.h> 36f47a594f5250b1914c36423ee6b371f0b8db09d0John Reck#include <minikin/FontFamily.h> 37f47a594f5250b1914c36423ee6b371f0b8db09d0John Reck#include <UniquePtr.h> 3823b797ab5151eb2474f3bdd679f2f07bfd723042John Reck 3923b797ab5151eb2474f3bdd679f2f07bfd723042John Reckusing std::vector; 4023b797ab5151eb2474f3bdd679f2f07bfd723042John Reck 4123b797ab5151eb2474f3bdd679f2f07bfd723042John Recknamespace android { 42119907cd2575c56b1ebf66348b52e67aaf6a88d8John Reck 43119907cd2575c56b1ebf66348b52e67aaf6a88d8John ReckFontStyle::FontStyle(int variant, int weight, bool italic) 443b20251a355c88193c439f928a84ae69483fb488John Reck : FontStyle(FontLanguageListCache::kEmptyListId, variant, weight, italic) { 453b20251a355c88193c439f928a84ae69483fb488John Reck} 464f02bf4eef6af47f35c70c4dda5b7b9523d89ca0John Reck 4751d6a3db97bdd5315f1a17a4b447d10a92217b98Chris CraikFontStyle::FontStyle(uint32_t languageListId, int variant, int weight, bool italic) 48ba6adf66d3c44c0aa2fd8a224862ff1901d64300John Reck : bits(pack(variant, weight, italic)), mLanguageListId(languageListId) { 494c9e59d03c2bca38001225b79d01740b8999adfbJohn Reck} 504c9e59d03c2bca38001225b79d01740b8999adfbJohn Reck 51443a714fa7c0dd07fee3527cc5bc3d3ca1fb7d44John Reckhash_t FontStyle::hash() const { 52b36016c65f1d1b5846dba0349aab491dbd3a746aJohn Reck uint32_t hash = JenkinsHashMix(0, bits); 5323b797ab5151eb2474f3bdd679f2f07bfd723042John Reck hash = JenkinsHashMix(hash, mLanguageListId); 5423b797ab5151eb2474f3bdd679f2f07bfd723042John Reck return JenkinsHashWhiten(hash); 5523b797ab5151eb2474f3bdd679f2f07bfd723042John Reck} 5617035b0211a3c9d45ea46a99217a6acbe76e8fbeJohn Reck 57443a714fa7c0dd07fee3527cc5bc3d3ca1fb7d44John Reck// static 584f02bf4eef6af47f35c70c4dda5b7b9523d89ca0John Reckuint32_t FontStyle::registerLanguageList(const std::string& languages) { 594f02bf4eef6af47f35c70c4dda5b7b9523d89ca0John Reck AutoMutex _l(gMinikinLock); 6017035b0211a3c9d45ea46a99217a6acbe76e8fbeJohn Reck return FontLanguageListCache::getId(languages); 6117035b0211a3c9d45ea46a99217a6acbe76e8fbeJohn Reck} 62d41c4d8c732095ae99c955b6b82f7306633004b1Chris Craik 6317035b0211a3c9d45ea46a99217a6acbe76e8fbeJohn Reck// static 6417035b0211a3c9d45ea46a99217a6acbe76e8fbeJohn Reckuint32_t FontStyle::pack(int variant, int weight, bool italic) { 65e2478d45ccbe5b6abb360ac9d44771b5f4a50bdeJohn Reck return (weight & kWeightMask) | (italic ? kItalicMask : 0) | (variant << kVariantShift); 664f02bf4eef6af47f35c70c4dda5b7b9523d89ca0John Reck} 674f02bf4eef6af47f35c70c4dda5b7b9523d89ca0John Reck 68d41c4d8c732095ae99c955b6b82f7306633004b1Chris CraikFontFamily::FontFamily(int variant) : FontFamily(FontLanguageListCache::kEmptyListId, variant) { 694f02bf4eef6af47f35c70c4dda5b7b9523d89ca0John Reck} 7023b797ab5151eb2474f3bdd679f2f07bfd723042John Reck 7123b797ab5151eb2474f3bdd679f2f07bfd723042John ReckFontFamily::~FontFamily() { 72a5dda645da738da7b4ae15e28fa7d93d3b04b94fJohn Reck for (size_t i = 0; i < mFonts.size(); i++) { 73fbc8df03e498baf47ff1a5e05e182f1bcd60c770John Reck mFonts[i].typeface->UnrefLocked(); 74fbc8df03e498baf47ff1a5e05e182f1bcd60c770John Reck } 75a5dda645da738da7b4ae15e28fa7d93d3b04b94fJohn Reck} 76a5dda645da738da7b4ae15e28fa7d93d3b04b94fJohn Reck 7723b797ab5151eb2474f3bdd679f2f07bfd723042John Reckbool FontFamily::addFont(MinikinFont* typeface) { 783b20251a355c88193c439f928a84ae69483fb488John Reck AutoMutex _l(gMinikinLock); 7923b797ab5151eb2474f3bdd679f2f07bfd723042John Reck const uint32_t os2Tag = MinikinFont::MakeTag('O', 'S', '/', '2'); 8023b797ab5151eb2474f3bdd679f2f07bfd723042John Reck size_t os2Size = 0; 8123b797ab5151eb2474f3bdd679f2f07bfd723042John Reck bool ok = typeface->GetTable(os2Tag, NULL, &os2Size); 8223b797ab5151eb2474f3bdd679f2f07bfd723042John Reck if (!ok) return false; 833b20251a355c88193c439f928a84ae69483fb488John Reck UniquePtr<uint8_t[]> os2Data(new uint8_t[os2Size]); 8423b797ab5151eb2474f3bdd679f2f07bfd723042John Reck ok = typeface->GetTable(os2Tag, os2Data.get(), &os2Size); 8523b797ab5151eb2474f3bdd679f2f07bfd723042John Reck if (!ok) return false; 8623b797ab5151eb2474f3bdd679f2f07bfd723042John Reck int weight; 871125d1fa92ab9f3b8315bbfb72e038b62dfd454bJohn Reck bool italic; 881125d1fa92ab9f3b8315bbfb72e038b62dfd454bJohn Reck if (analyzeStyle(os2Data.get(), os2Size, &weight, &italic)) { 894f02bf4eef6af47f35c70c4dda5b7b9523d89ca0John Reck //ALOGD("analyzed weight = %d, italic = %s", weight, italic ? "true" : "false"); 90dbc9a86d05e5e835051de22f6cb30ec1921e9705John Reck FontStyle style(weight, italic); 91368cdd85268999997fb495cf90c4417221797de0John Reck addFontLocked(typeface, style); 92368cdd85268999997fb495cf90c4417221797de0John Reck return true; 934f02bf4eef6af47f35c70c4dda5b7b9523d89ca0John Reck } else { 944f02bf4eef6af47f35c70c4dda5b7b9523d89ca0John Reck ALOGD("failed to analyze style"); 954f02bf4eef6af47f35c70c4dda5b7b9523d89ca0John Reck } 96d04794a9a3f9edc8b7ca336175d66eb81a8f55faJohn Reck return false; 97d04794a9a3f9edc8b7ca336175d66eb81a8f55faJohn Reck} 98d41c4d8c732095ae99c955b6b82f7306633004b1Chris Craik 992cdbc7d2283aae3d77b12c8fdbba8ca4bd3db5eaJohn Reckvoid FontFamily::addFont(MinikinFont* typeface, FontStyle style) { 1004f02bf4eef6af47f35c70c4dda5b7b9523d89ca0John Reck AutoMutex _l(gMinikinLock); 1014f02bf4eef6af47f35c70c4dda5b7b9523d89ca0John Reck addFontLocked(typeface, style); 1024f02bf4eef6af47f35c70c4dda5b7b9523d89ca0John Reck} 103f7d9c1dc84671d4e99657ef071d275700d85bb11John Reck 104f7d9c1dc84671d4e99657ef071d275700d85bb11John Reckvoid FontFamily::addFontLocked(MinikinFont* typeface, FontStyle style) { 105f7d9c1dc84671d4e99657ef071d275700d85bb11John Reck typeface->RefLocked(); 106dbc9a86d05e5e835051de22f6cb30ec1921e9705John Reck mFonts.push_back(Font(typeface, style)); 1074f02bf4eef6af47f35c70c4dda5b7b9523d89ca0John Reck mCoverageValid = false; 1084f02bf4eef6af47f35c70c4dda5b7b9523d89ca0John Reck} 1091125d1fa92ab9f3b8315bbfb72e038b62dfd454bJohn Reck 1101125d1fa92ab9f3b8315bbfb72e038b62dfd454bJohn Reck// Compute a matching metric between two styles - 0 is an exact match 1111125d1fa92ab9f3b8315bbfb72e038b62dfd454bJohn Reckstatic int computeMatch(FontStyle style1, FontStyle style2) { 1121125d1fa92ab9f3b8315bbfb72e038b62dfd454bJohn Reck if (style1 == style2) return 0; 113a5dda645da738da7b4ae15e28fa7d93d3b04b94fJohn Reck int score = abs(style1.getWeight() - style2.getWeight()); 1144f02bf4eef6af47f35c70c4dda5b7b9523d89ca0John Reck if (style1.getItalic() != style2.getItalic()) { 1152cdbc7d2283aae3d77b12c8fdbba8ca4bd3db5eaJohn Reck score += 2; 1163b20251a355c88193c439f928a84ae69483fb488John Reck } 1174f02bf4eef6af47f35c70c4dda5b7b9523d89ca0John Reck return score; 1184f02bf4eef6af47f35c70c4dda5b7b9523d89ca0John Reck} 1194f02bf4eef6af47f35c70c4dda5b7b9523d89ca0John Reck 1204f02bf4eef6af47f35c70c4dda5b7b9523d89ca0John Reckstatic FontFakery computeFakery(FontStyle wanted, FontStyle actual) { 121a5dda645da738da7b4ae15e28fa7d93d3b04b94fJohn Reck // If desired weight is semibold or darker, and 2 or more grades 1224f02bf4eef6af47f35c70c4dda5b7b9523d89ca0John Reck // higher than actual (for example, medium 500 -> bold 700), then 123f7d9c1dc84671d4e99657ef071d275700d85bb11John Reck // select fake bold. 124f7d9c1dc84671d4e99657ef071d275700d85bb11John Reck int wantedWeight = wanted.getWeight(); 1259fb42f07784ac9e1ab29fa7d5bcda6c3081d238fJohn Reck bool isFakeBold = wantedWeight >= 6 && (wantedWeight - actual.getWeight()) >= 2; 12601a5ea35fbba4c5bb1d7790ae1677a2fa752e042John Reck bool isFakeItalic = wanted.getItalic() && !actual.getItalic(); 1274f02bf4eef6af47f35c70c4dda5b7b9523d89ca0John Reck return FontFakery(isFakeBold, isFakeItalic); 1284f02bf4eef6af47f35c70c4dda5b7b9523d89ca0John Reck} 129284b24358410cb0200e525a5ba36994090c83f20Chris Craik 13050210d912925aef14e4ce69be82e4949122a3cd9Alan ViveretteFakedFont FontFamily::getClosestMatch(FontStyle style) const { 13164bb413a664001c95c8439cf097dc3033f4ed733Andreas Gampe const Font* bestFont = NULL; 1324f02bf4eef6af47f35c70c4dda5b7b9523d89ca0John Reck int bestMatch = 0; 13350210d912925aef14e4ce69be82e4949122a3cd9Alan Viverette for (size_t i = 0; i < mFonts.size(); i++) { 13450210d912925aef14e4ce69be82e4949122a3cd9Alan Viverette const Font& font = mFonts[i]; 13550210d912925aef14e4ce69be82e4949122a3cd9Alan Viverette int match = computeMatch(font.style, style); 13650210d912925aef14e4ce69be82e4949122a3cd9Alan Viverette if (i == 0 || match < bestMatch) { 13750210d912925aef14e4ce69be82e4949122a3cd9Alan Viverette bestFont = &font; 13850210d912925aef14e4ce69be82e4949122a3cd9Alan Viverette bestMatch = match; 1394f02bf4eef6af47f35c70c4dda5b7b9523d89ca0John Reck } 1404f02bf4eef6af47f35c70c4dda5b7b9523d89ca0John Reck } 14163a06673253914510bbeebd500655008682dade1John Reck FakedFont result; 14263a06673253914510bbeebd500655008682dade1John Reck if (bestFont == NULL) { 14363a06673253914510bbeebd500655008682dade1John Reck result.font = NULL; 14463a06673253914510bbeebd500655008682dade1John Reck } else { 145860d155f866cc15a725e7ce03763280987f24901John Reck result.font = bestFont->typeface; 146dbc9a86d05e5e835051de22f6cb30ec1921e9705John Reck result.fakery = computeFakery(style, bestFont->style); 147dbc9a86d05e5e835051de22f6cb30ec1921e9705John Reck } 148f2dcc2aecb94e726096256c47b913ed0a57ae7e2John Reck return result; 149f2dcc2aecb94e726096256c47b913ed0a57ae7e2John Reck} 150f2dcc2aecb94e726096256c47b913ed0a57ae7e2John Reck 151f2dcc2aecb94e726096256c47b913ed0a57ae7e2John Recksize_t FontFamily::getNumFonts() const { 152f2dcc2aecb94e726096256c47b913ed0a57ae7e2John Reck return mFonts.size(); 153860d155f866cc15a725e7ce03763280987f24901John Reck} 154860d155f866cc15a725e7ce03763280987f24901John Reck 15568bfe0a37a0dcef52abd81688d8520c5d16e1a85John ReckMinikinFont* FontFamily::getFont(size_t index) const { 15668bfe0a37a0dcef52abd81688d8520c5d16e1a85John Reck return mFonts[index].typeface; 157d72e0a339b54af0c4e731513bbad120dff694723John Reck} 158d72e0a339b54af0c4e731513bbad120dff694723John Reck 159d72e0a339b54af0c4e731513bbad120dff694723John ReckFontStyle FontFamily::getStyle(size_t index) const { 16019b6bcfd83eb7fb92ebd06d2fec89e308311f1d0John Reck return mFonts[index].style; 16119b6bcfd83eb7fb92ebd06d2fec89e308311f1d0John Reck} 16219b6bcfd83eb7fb92ebd06d2fec89e308311f1d0John Reck 163bf3c602284f9a344faf185c3a5e94a264ba44c4fJohn Reckconst SparseBitSet* FontFamily::getCoverage() { 1641b54fb27ac48495ed0b33868fda5776fb49fe0f3Chris Craik if (!mCoverageValid) { 165bf3c602284f9a344faf185c3a5e94a264ba44c4fJohn Reck const FontStyle defaultStyle; 166bf3c602284f9a344faf185c3a5e94a264ba44c4fJohn Reck MinikinFont* typeface = getClosestMatch(defaultStyle).font; 167be3fba05e823f740f65b2679929347dc3dd282adJohn Reck const uint32_t cmapTag = MinikinFont::MakeTag('c', 'm', 'a', 'p'); 168f9be77940e365036fecd8cc0e491e8545c34e79bJohn Reck size_t cmapSize = 0; 16918f16e6fba74eda173e1e7c869e6e2e2acc073ffJohn Reck if (!typeface->GetTable(cmapTag, NULL, &cmapSize)) { 170bf3c602284f9a344faf185c3a5e94a264ba44c4fJohn Reck ALOGE("Could not get cmap table size!\n"); 171bf3c602284f9a344faf185c3a5e94a264ba44c4fJohn Reck // Note: This means we will retry on the next call to getCoverage, as we can't store 172bf3c602284f9a344faf185c3a5e94a264ba44c4fJohn Reck // the failure. This is fine, as we assume this doesn't really happen in practice. 173bf3c602284f9a344faf185c3a5e94a264ba44c4fJohn Reck return nullptr; 174bf3c602284f9a344faf185c3a5e94a264ba44c4fJohn Reck } 175ba6adf66d3c44c0aa2fd8a224862ff1901d64300John Reck UniquePtr<uint8_t[]> cmapData(new uint8_t[cmapSize]); 176be3fba05e823f740f65b2679929347dc3dd282adJohn Reck if (!typeface->GetTable(cmapTag, cmapData.get(), &cmapSize)) { 177ba6adf66d3c44c0aa2fd8a224862ff1901d64300John Reck ALOGE("Unexpected failure to read cmap table!\n"); 178ba6adf66d3c44c0aa2fd8a224862ff1901d64300John Reck return nullptr; 179e4267ea4f20740c37c01bfb6aefcf61fddc4566aJohn Reck } 18025fbb3fa1138675379102a44405852555cefccbdJohn Reck // TODO: Error check? 18100e79c9947b741194ff6c0d08ede9b3befbf9c9dJohn Reck CmapCoverage::getCoverage(mCoverage, cmapData.get(), cmapSize, &mHasVSTable); 18200e79c9947b741194ff6c0d08ede9b3befbf9c9dJohn Reck#ifdef VERBOSE_DEBUG 183ec845a215e343cdb3b2e4c7b6aff7b24beb0236bJohn Reck ALOGD("font coverage length=%d, first ch=%x\n", mCoverage.length(), 184e45b1fd03b524d2b57cc6c222d89076a31a08beaJohn Reck mCoverage.nextSetBit(0)); 185119907cd2575c56b1ebf66348b52e67aaf6a88d8John Reck#endif 186e45b1fd03b524d2b57cc6c222d89076a31a08beaJohn Reck mCoverageValid = true; 18700e79c9947b741194ff6c0d08ede9b3befbf9c9dJohn Reck } 188998a6d81896df8b662cc10ddeb35087b78b38d72John Reck return &mCoverage; 189aa95a88327d9a3ac8a4a00b065b78ac0f28b3a19John Reck} 1901b54fb27ac48495ed0b33868fda5776fb49fe0f3Chris Craik 191aa95a88327d9a3ac8a4a00b065b78ac0f28b3a19John Reckbool FontFamily::hasVariationSelector(uint32_t codepoint, uint32_t variationSelector) { 192aa95a88327d9a3ac8a4a00b065b78ac0f28b3a19John Reck assertMinikinLocked(); 193aa95a88327d9a3ac8a4a00b065b78ac0f28b3a19John Reck if (!mHasVSTable) { 194aa95a88327d9a3ac8a4a00b065b78ac0f28b3a19John Reck return false; 195a5dda645da738da7b4ae15e28fa7d93d3b04b94fJohn Reck } 196a5dda645da738da7b4ae15e28fa7d93d3b04b94fJohn Reck 197a5dda645da738da7b4ae15e28fa7d93d3b04b94fJohn Reck const FontStyle defaultStyle; 198a5dda645da738da7b4ae15e28fa7d93d3b04b94fJohn Reck MinikinFont* minikinFont = getClosestMatch(defaultStyle).font; 199a5dda645da738da7b4ae15e28fa7d93d3b04b94fJohn Reck hb_font_t* font = getHbFontLocked(minikinFont); 200a5dda645da738da7b4ae15e28fa7d93d3b04b94fJohn Reck uint32_t unusedGlyph; 201a5dda645da738da7b4ae15e28fa7d93d3b04b94fJohn Reck return hb_font_get_glyph(font, codepoint, variationSelector, &unusedGlyph); 202a5dda645da738da7b4ae15e28fa7d93d3b04b94fJohn Reck} 203aef9dc8d186bd5f78068ab2d5240b5e9c8ab44b6John Reck 2041b54fb27ac48495ed0b33868fda5776fb49fe0f3Chris Craikbool FontFamily::hasVSTable() const { 205aef9dc8d186bd5f78068ab2d5240b5e9c8ab44b6John Reck LOG_ALWAYS_FATAL_IF(!mCoverageValid, "Do not call this method before getCoverage() call"); 206aef9dc8d186bd5f78068ab2d5240b5e9c8ab44b6John Reck return mHasVSTable; 207a5dda645da738da7b4ae15e28fa7d93d3b04b94fJohn Reck} 208cd028f336e36b22dbe8cf623eb5bd2361314495cJohn Reck 209f9be77940e365036fecd8cc0e491e8545c34e79bJohn Reck} // namespace android 210f9be77940e365036fecd8cc0e491e8545c34e79bJohn Reck