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 Typeface* result = new Typeface;
74 if (result != nullptr) {
75 result->fFontCollection = resolvedFace->fFontCollection;
76 result->fBaseWeight = resolvedFace->fBaseWeight;
77 result->fAPIStyle = style;
78 result->fStyle = computeRelativeStyle(result->fBaseWeight, style);
79 }
80 return result;
81 }
82
createAbsolute(Typeface * base,int weight,bool italic)83 Typeface* Typeface::createAbsolute(Typeface* base, int weight, bool italic) {
84 const Typeface* resolvedFace = Typeface::resolveDefault(base);
85 Typeface* result = new Typeface();
86 if (result != nullptr) {
87 result->fFontCollection = resolvedFace->fFontCollection;
88 result->fBaseWeight = resolvedFace->fBaseWeight;
89 result->fAPIStyle = computeAPIStyle(weight, italic);
90 result->fStyle = computeMinikinStyle(weight, italic);
91 }
92 return result;
93 }
94
createFromTypefaceWithVariation(Typeface * src,const std::vector<minikin::FontVariation> & variations)95 Typeface* Typeface::createFromTypefaceWithVariation(
96 Typeface* src, const std::vector<minikin::FontVariation>& variations) {
97 const Typeface* resolvedFace = Typeface::resolveDefault(src);
98 Typeface* result = new Typeface();
99 if (result != nullptr) {
100 result->fFontCollection =
101 resolvedFace->fFontCollection->createCollectionWithVariation(variations);
102 if (result->fFontCollection == nullptr) {
103 // None of passed axes are supported by this collection.
104 // So we will reuse the same collection with incrementing reference count.
105 result->fFontCollection = resolvedFace->fFontCollection;
106 }
107 // Do not update styles.
108 // TODO: We may want to update base weight if the 'wght' is specified.
109 result->fBaseWeight = resolvedFace->fBaseWeight;
110 result->fAPIStyle = resolvedFace->fAPIStyle;
111 result->fStyle = resolvedFace->fStyle;
112 }
113 return result;
114 }
115
createWithDifferentBaseWeight(Typeface * src,int weight)116 Typeface* Typeface::createWithDifferentBaseWeight(Typeface* src, int weight) {
117 const Typeface* resolvedFace = Typeface::resolveDefault(src);
118 Typeface* result = new Typeface;
119 if (result != nullptr) {
120 result->fFontCollection = resolvedFace->fFontCollection;
121 result->fBaseWeight = weight;
122 result->fAPIStyle = resolvedFace->fAPIStyle;
123 result->fStyle = computeRelativeStyle(weight, result->fAPIStyle);
124 }
125 return result;
126 }
127
createFromFamilies(std::vector<std::shared_ptr<minikin::FontFamily>> && families,int weight,int italic,const Typeface * fallback)128 Typeface* Typeface::createFromFamilies(std::vector<std::shared_ptr<minikin::FontFamily>>&& families,
129 int weight, int italic, const Typeface* fallback) {
130 Typeface* result = new Typeface;
131 if (fallback == nullptr) {
132 result->fFontCollection = minikin::FontCollection::create(std::move(families));
133 } else {
134 result->fFontCollection =
135 fallback->fFontCollection->createCollectionWithFamilies(std::move(families));
136 }
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
145 : families[0]->getClosestMatch(defaultStyle).typeface().get();
146 if (mf != nullptr) {
147 SkTypeface* skTypeface = reinterpret_cast<const MinikinFontSkia*>(mf)->GetSkTypeface();
148 const SkFontStyle& style = skTypeface->fontStyle();
149 weightFromFont = style.weight();
150 italicFromFont = style.slant() != SkFontStyle::kUpright_Slant;
151 } else {
152 // We can't obtain any information from fonts. Just use default values.
153 weightFromFont = SkFontStyle::kNormal_Weight;
154 italicFromFont = false;
155 }
156
157 if (weight == RESOLVE_BY_FONT_TABLE) {
158 weight = weightFromFont;
159 }
160 if (italic == RESOLVE_BY_FONT_TABLE) {
161 italic = italicFromFont ? 1 : 0;
162 }
163 }
164
165 // Sanitize the invalid value passed from public API.
166 if (weight < 0) {
167 weight = SkFontStyle::kNormal_Weight;
168 }
169
170 result->fBaseWeight = weight;
171 result->fAPIStyle = computeAPIStyle(weight, italic);
172 result->fStyle = computeMinikinStyle(weight, italic);
173 return result;
174 }
175
setDefault(const Typeface * face)176 void Typeface::setDefault(const Typeface* face) {
177 gDefaultTypeface = face;
178 }
179
setRobotoTypefaceForTest()180 void Typeface::setRobotoTypefaceForTest() {
181 #ifndef _WIN32
182 const char* kRobotoFont = "/system/fonts/Roboto-Regular.ttf";
183
184 int fd = open(kRobotoFont, O_RDONLY);
185 LOG_ALWAYS_FATAL_IF(fd == -1, "Failed to open file %s", kRobotoFont);
186 struct stat st = {};
187 LOG_ALWAYS_FATAL_IF(fstat(fd, &st) == -1, "Failed to stat file %s", kRobotoFont);
188 void* data = mmap(nullptr, st.st_size, PROT_READ, MAP_SHARED, fd, 0);
189 std::unique_ptr<SkStreamAsset> fontData(new SkMemoryStream(data, st.st_size));
190 sk_sp<SkFontMgr> fm = android::FreeTypeFontMgr();
191 LOG_ALWAYS_FATAL_IF(fm == nullptr, "Could not load FreeType SkFontMgr");
192 sk_sp<SkTypeface> typeface = fm->makeFromStream(std::move(fontData));
193 LOG_ALWAYS_FATAL_IF(typeface == nullptr, "Failed to make typeface from %s", kRobotoFont);
194
195 std::shared_ptr<minikin::MinikinFont> font =
196 std::make_shared<MinikinFontSkia>(std::move(typeface), 0, data, st.st_size, kRobotoFont,
197 0, std::vector<minikin::FontVariation>());
198 std::vector<std::shared_ptr<minikin::Font>> fonts;
199 fonts.push_back(minikin::Font::Builder(font).build());
200
201 std::shared_ptr<minikin::FontCollection> collection =
202 minikin::FontCollection::create(minikin::FontFamily::create(std::move(fonts)));
203
204 Typeface* hwTypeface = new Typeface();
205 hwTypeface->fFontCollection = collection;
206 hwTypeface->fAPIStyle = Typeface::kNormal;
207 hwTypeface->fBaseWeight = SkFontStyle::kNormal_Weight;
208 hwTypeface->fStyle = minikin::FontStyle();
209
210 Typeface::setDefault(hwTypeface);
211 #endif
212 }
213 } // namespace android
214