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 #include "Typeface.h"
18
19 #include <fcntl.h> // For tests.
20 #include <pthread.h>
21 #ifndef _WIN32
22 #include <sys/mman.h> // For tests.
23 #endif
24 #include <sys/stat.h> // For tests.
25
26 #include "MinikinSkia.h"
27 #include "SkPaint.h"
28 #include "SkStream.h" // For tests.
29 #include "SkTypeface.h"
30 #include "utils/TypefaceUtils.h"
31
32 #include <minikin/FontCollection.h>
33 #include <minikin/FontFamily.h>
34 #include <minikin/Layout.h>
35 #include <utils/Log.h>
36 #include <utils/MathUtils.h>
37
38 namespace android {
39
computeAPIStyle(int weight,bool italic)40 static Typeface::Style computeAPIStyle(int weight, bool italic) {
41 // This bold detection comes from SkTypeface.h
42 if (weight >= SkFontStyle::kSemiBold_Weight) {
43 return italic ? Typeface::kBoldItalic : Typeface::kBold;
44 } else {
45 return italic ? Typeface::kItalic : Typeface::kNormal;
46 }
47 }
48
computeMinikinStyle(int weight,bool italic)49 static minikin::FontStyle computeMinikinStyle(int weight, bool italic) {
50 return minikin::FontStyle(uirenderer::MathUtils::clamp(weight, 1, 1000),
51 static_cast<minikin::FontStyle::Slant>(italic));
52 }
53
54 // Resolve the relative weight from the baseWeight and target style.
computeRelativeStyle(int baseWeight,Typeface::Style relativeStyle)55 static minikin::FontStyle computeRelativeStyle(int baseWeight, Typeface::Style relativeStyle) {
56 int weight = baseWeight;
57 if ((relativeStyle & Typeface::kBold) != 0) {
58 weight += 300;
59 }
60 bool italic = (relativeStyle & Typeface::kItalic) != 0;
61 return computeMinikinStyle(weight, italic);
62 }
63
64 const Typeface* gDefaultTypeface = NULL;
65
resolveDefault(const Typeface * src)66 const Typeface* Typeface::resolveDefault(const Typeface* src) {
67 LOG_ALWAYS_FATAL_IF(src == nullptr && gDefaultTypeface == nullptr);
68 return src == nullptr ? gDefaultTypeface : src;
69 }
70
createRelative(Typeface * src,Typeface::Style style)71 Typeface* Typeface::createRelative(Typeface* src, Typeface::Style style) {
72 const Typeface* resolvedFace = Typeface::resolveDefault(src);
73 return new Typeface(resolvedFace->getFontCollection(),
74 computeRelativeStyle(resolvedFace->getBaseWeight(), style), style,
75 resolvedFace->getBaseWeight(), resolvedFace->isVariationInstance());
76 }
77
createAbsolute(Typeface * base,int weight,bool italic)78 Typeface* Typeface::createAbsolute(Typeface* base, int weight, bool italic) {
79 const Typeface* resolvedFace = Typeface::resolveDefault(base);
80 return new Typeface(resolvedFace->getFontCollection(), computeMinikinStyle(weight, italic),
81 computeAPIStyle(weight, italic), resolvedFace->getBaseWeight(),
82 resolvedFace->isVariationInstance());
83 }
84
createFromTypefaceWithVariation(Typeface * src,const minikin::VariationSettings & variations)85 Typeface* Typeface::createFromTypefaceWithVariation(Typeface* src,
86 const minikin::VariationSettings& variations) {
87 const Typeface* resolvedFace = Typeface::resolveDefault(src);
88 const std::shared_ptr<minikin::FontCollection>& fc =
89 resolvedFace->getFontCollection()->createCollectionWithVariation(variations);
90 return new Typeface(
91 // None of passed axes are supported by this collection.
92 // So we will reuse the same collection with incrementing reference count.
93 fc ? fc : resolvedFace->getFontCollection(),
94 // Do not update styles.
95 // TODO: We may want to update base weight if the 'wght' is specified.
96 resolvedFace->fStyle, resolvedFace->getAPIStyle(), resolvedFace->getBaseWeight(), true);
97 }
98
createWithDifferentBaseWeight(Typeface * src,int weight)99 Typeface* Typeface::createWithDifferentBaseWeight(Typeface* src, int weight) {
100 const Typeface* resolvedFace = Typeface::resolveDefault(src);
101 return new Typeface(resolvedFace->getFontCollection(),
102 computeRelativeStyle(weight, resolvedFace->getAPIStyle()),
103 resolvedFace->getAPIStyle(), weight, resolvedFace->isVariationInstance());
104 }
105
createFromFamilies(std::vector<std::shared_ptr<minikin::FontFamily>> && families,int weight,int italic,const Typeface * fallback)106 Typeface* Typeface::createFromFamilies(std::vector<std::shared_ptr<minikin::FontFamily>>&& families,
107 int weight, int italic, const Typeface* fallback) {
108 const std::shared_ptr<minikin::FontCollection>& fc =
109 fallback ? fallback->getFontCollection()->createCollectionWithFamilies(
110 std::move(families))
111 : minikin::FontCollection::create(std::move(families));
112
113 if (weight == RESOLVE_BY_FONT_TABLE || italic == RESOLVE_BY_FONT_TABLE) {
114 int weightFromFont;
115 bool italicFromFont;
116
117 const minikin::FontStyle defaultStyle;
118 const minikin::MinikinFont* mf =
119 families.empty() ? nullptr
120 : families[0]->getClosestMatch(defaultStyle).typeface().get();
121 if (mf != nullptr) {
122 SkTypeface* skTypeface = reinterpret_cast<const MinikinFontSkia*>(mf)->GetSkTypeface();
123 const SkFontStyle& style = skTypeface->fontStyle();
124 weightFromFont = style.weight();
125 italicFromFont = style.slant() != SkFontStyle::kUpright_Slant;
126 } else {
127 // We can't obtain any information from fonts. Just use default values.
128 weightFromFont = SkFontStyle::kNormal_Weight;
129 italicFromFont = false;
130 }
131
132 if (weight == RESOLVE_BY_FONT_TABLE) {
133 weight = weightFromFont;
134 }
135 if (italic == RESOLVE_BY_FONT_TABLE) {
136 italic = italicFromFont ? 1 : 0;
137 }
138 }
139
140 // Sanitize the invalid value passed from public API.
141 if (weight < 0) {
142 weight = SkFontStyle::kNormal_Weight;
143 }
144
145 return new Typeface(fc, computeMinikinStyle(weight, italic), computeAPIStyle(weight, italic),
146 weight, false);
147 }
148
setDefault(const Typeface * face)149 void Typeface::setDefault(const Typeface* face) {
150 gDefaultTypeface = face;
151 }
152
setRobotoTypefaceForTest()153 void Typeface::setRobotoTypefaceForTest() {
154 #ifndef _WIN32
155 const char* kRobotoFont = "/system/fonts/Roboto-Regular.ttf";
156
157 int fd = open(kRobotoFont, O_RDONLY);
158 LOG_ALWAYS_FATAL_IF(fd == -1, "Failed to open file %s", kRobotoFont);
159 struct stat st = {};
160 LOG_ALWAYS_FATAL_IF(fstat(fd, &st) == -1, "Failed to stat file %s", kRobotoFont);
161 void* data = mmap(nullptr, st.st_size, PROT_READ, MAP_SHARED, fd, 0);
162 std::unique_ptr<SkStreamAsset> fontData(new SkMemoryStream(data, st.st_size));
163 sk_sp<SkFontMgr> fm = android::FreeTypeFontMgr();
164 LOG_ALWAYS_FATAL_IF(fm == nullptr, "Could not load FreeType SkFontMgr");
165 sk_sp<SkTypeface> typeface = fm->makeFromStream(std::move(fontData));
166 LOG_ALWAYS_FATAL_IF(typeface == nullptr, "Failed to make typeface from %s", kRobotoFont);
167
168 std::shared_ptr<minikin::MinikinFont> font = std::make_shared<MinikinFontSkia>(
169 std::move(typeface), 0, data, st.st_size, kRobotoFont, 0, minikin::VariationSettings());
170 std::vector<std::shared_ptr<minikin::Font>> fonts;
171 fonts.push_back(minikin::Font::Builder(font).build());
172
173 std::shared_ptr<minikin::FontCollection> collection =
174 minikin::FontCollection::create(minikin::FontFamily::create(std::move(fonts)));
175
176 Typeface* hwTypeface = new Typeface(collection, minikin::FontStyle(), Typeface::kNormal,
177 SkFontStyle::kNormal_Weight, false);
178
179 Typeface::setDefault(hwTypeface);
180 #endif
181 }
182 } // namespace android
183