1/* 2 * Copyright (C) 2013 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17/** 18 * This is the implementation of the Typeface object. Historically, it has 19 * just been SkTypeface, but we are migrating to Minikin. For the time 20 * being, that choice is hidden under the USE_MINIKIN compile-time flag. 21 */ 22 23#include "Typeface.h" 24 25#include <pthread.h> 26#include <fcntl.h> // For tests. 27#include <sys/stat.h> // For tests. 28#include <sys/mman.h> // For tests. 29 30#include "MinikinSkia.h" 31#include "SkTypeface.h" 32#include "SkPaint.h" 33#include "SkStream.h" // Fot tests. 34 35#include <minikin/FontCollection.h> 36#include <minikin/FontFamily.h> 37#include <minikin/Layout.h> 38#include <utils/Log.h> 39#include <utils/MathUtils.h> 40 41namespace android { 42 43static SkTypeface::Style computeSkiaStyle(int weight, bool italic) { 44 // This bold detection comes from SkTypeface.h 45 if (weight >= SkFontStyle::kSemiBold_Weight) { 46 return italic ? SkTypeface::kBoldItalic : SkTypeface::kBold; 47 } else { 48 return italic ? SkTypeface::kItalic : SkTypeface::kNormal; 49 } 50} 51 52static minikin::FontStyle computeMinikinStyle(int weight, bool italic) { 53 // TODO: Better to use raw base weight value for font selection instead of dividing by 100. 54 const int minikinWeight = uirenderer::MathUtils::clamp((weight + 50) / 100, 1, 10); 55 return minikin::FontStyle(minikinWeight, italic); 56} 57 58// Resolve the relative weight from the baseWeight and target style. 59static minikin::FontStyle computeRelativeStyle(int baseWeight, SkTypeface::Style relativeStyle) { 60 int weight = baseWeight; 61 if ((relativeStyle & SkTypeface::kBold) != 0) { 62 weight += 300; 63 } 64 bool italic = (relativeStyle & SkTypeface::kItalic) != 0; 65 return computeMinikinStyle(weight, italic); 66} 67 68Typeface* gDefaultTypeface = NULL; 69 70Typeface* Typeface::resolveDefault(Typeface* src) { 71 LOG_ALWAYS_FATAL_IF(gDefaultTypeface == nullptr); 72 return src == nullptr ? gDefaultTypeface : src; 73} 74 75Typeface* Typeface::createRelative(Typeface* src, SkTypeface::Style style) { 76 Typeface* resolvedFace = Typeface::resolveDefault(src); 77 Typeface* result = new Typeface; 78 if (result != nullptr) { 79 result->fFontCollection = resolvedFace->fFontCollection; 80 result->fBaseWeight = resolvedFace->fBaseWeight; 81 result->fSkiaStyle = style; 82 result->fStyle = computeRelativeStyle(result->fBaseWeight, style); 83 } 84 return result; 85} 86 87Typeface* Typeface::createAbsolute(Typeface* base, int weight, bool italic) { 88 Typeface* resolvedFace = Typeface::resolveDefault(base); 89 Typeface* result = new Typeface(); 90 if (result != nullptr) { 91 result->fFontCollection = resolvedFace->fFontCollection; 92 result->fBaseWeight = resolvedFace->fBaseWeight; 93 result->fSkiaStyle = computeSkiaStyle(weight, italic); 94 result->fStyle = computeMinikinStyle(weight, italic); 95 } 96 return result; 97} 98 99Typeface* Typeface::createFromTypefaceWithVariation(Typeface* src, 100 const std::vector<minikin::FontVariation>& variations) { 101 Typeface* resolvedFace = Typeface::resolveDefault(src); 102 Typeface* result = new Typeface(); 103 if (result != nullptr) { 104 result->fFontCollection = 105 resolvedFace->fFontCollection->createCollectionWithVariation(variations); 106 if (result->fFontCollection == nullptr) { 107 // None of passed axes are supported by this collection. 108 // So we will reuse the same collection with incrementing reference count. 109 result->fFontCollection = resolvedFace->fFontCollection; 110 } 111 // Do not update styles. 112 // TODO: We may want to update base weight if the 'wght' is specified. 113 result->fBaseWeight = resolvedFace->fBaseWeight; 114 result->fSkiaStyle = resolvedFace->fSkiaStyle; 115 result->fStyle = resolvedFace->fStyle; 116 } 117 return result; 118} 119 120Typeface* Typeface::createWithDifferentBaseWeight(Typeface* src, int weight) { 121 Typeface* resolvedFace = Typeface::resolveDefault(src); 122 Typeface* result = new Typeface; 123 if (result != nullptr) { 124 result->fFontCollection = resolvedFace->fFontCollection; 125 result->fBaseWeight = weight; 126 result->fSkiaStyle = resolvedFace->fSkiaStyle; 127 result->fStyle = computeRelativeStyle(weight, result->fSkiaStyle); 128 } 129 return result; 130} 131 132Typeface* Typeface::createFromFamilies( 133 std::vector<std::shared_ptr<minikin::FontFamily>>&& families, 134 int weight, int italic) { 135 Typeface* result = new Typeface; 136 result->fFontCollection.reset(new minikin::FontCollection(families)); 137 138 if (weight == RESOLVE_BY_FONT_TABLE || italic == RESOLVE_BY_FONT_TABLE) { 139 int weightFromFont; 140 bool italicFromFont; 141 142 const minikin::FontStyle defaultStyle; 143 const minikin::MinikinFont* mf = 144 families.empty() ? nullptr : families[0]->getClosestMatch(defaultStyle).font; 145 if (mf != nullptr) { 146 SkTypeface* skTypeface = reinterpret_cast<const MinikinFontSkia*>(mf)->GetSkTypeface(); 147 const SkFontStyle& style = skTypeface->fontStyle(); 148 weightFromFont = style.weight(); 149 italicFromFont = style.slant() != SkFontStyle::kUpright_Slant; 150 } else { 151 // We can't obtain any information from fonts. Just use default values. 152 weightFromFont = SkFontStyle::kNormal_Weight; 153 italicFromFont = false; 154 } 155 156 if (weight == RESOLVE_BY_FONT_TABLE) { 157 weight = weightFromFont; 158 } 159 if (italic == RESOLVE_BY_FONT_TABLE) { 160 italic = italicFromFont? 1 : 0; 161 } 162 } 163 164 // Sanitize the invalid value passed from public API. 165 if (weight < 0) { 166 weight = SkFontStyle::kNormal_Weight; 167 } 168 169 result->fBaseWeight = weight; 170 result->fSkiaStyle = computeSkiaStyle(weight, italic); 171 result->fStyle = computeMinikinStyle(weight, italic); 172 return result; 173} 174 175void Typeface::setDefault(Typeface* face) { 176 gDefaultTypeface = face; 177} 178 179void Typeface::setRobotoTypefaceForTest() { 180 const char* kRobotoFont = "/system/fonts/Roboto-Regular.ttf"; 181 182 int fd = open(kRobotoFont, O_RDONLY); 183 LOG_ALWAYS_FATAL_IF(fd == -1, "Failed to open file %s", kRobotoFont); 184 struct stat st = {}; 185 LOG_ALWAYS_FATAL_IF(fstat(fd, &st) == -1, "Failed to stat file %s", kRobotoFont); 186 void* data = mmap(nullptr, st.st_size, PROT_READ, MAP_SHARED, fd, 0); 187 std::unique_ptr<SkMemoryStream> fontData(new SkMemoryStream(data, st.st_size)); 188 sk_sp<SkTypeface> typeface = SkTypeface::MakeFromStream(fontData.release()); 189 LOG_ALWAYS_FATAL_IF(typeface == nullptr, "Failed to make typeface from %s", kRobotoFont); 190 191 std::shared_ptr<minikin::MinikinFont> font = std::make_shared<MinikinFontSkia>( 192 std::move(typeface), data, st.st_size, 0, std::vector<minikin::FontVariation>()); 193 std::shared_ptr<minikin::FontFamily> family = std::make_shared<minikin::FontFamily>( 194 std::vector<minikin::Font>({ minikin::Font(std::move(font), minikin::FontStyle()) })); 195 std::shared_ptr<minikin::FontCollection> collection = 196 std::make_shared<minikin::FontCollection>(std::move(family)); 197 198 Typeface* hwTypeface = new Typeface(); 199 hwTypeface->fFontCollection = collection; 200 hwTypeface->fSkiaStyle = SkTypeface::kNormal; 201 hwTypeface->fBaseWeight = SkFontStyle::kNormal_Weight; 202 hwTypeface->fStyle = minikin::FontStyle(4 /* weight */, false /* italic */); 203 204 Typeface::setDefault(hwTypeface); 205} 206 207} 208