1 /*
2 * Copyright 2017 Google Inc.
3 *
4 * Use of this source code is governed by a BSD-style license that can be
5 * found in the LICENSE file.
6 */
7
8 #include "include/core/SkStream.h"
9 #include "include/ports/SkFontMgr_directory.h"
10 #include "src/core/SkOSFile.h"
11 #include "src/ports/SkFontMgr_custom.h"
12 #include "src/utils/SkOSPath.h"
13
14 class DirectorySystemFontLoader : public SkFontMgr_Custom::SystemFontLoader {
15 public:
DirectorySystemFontLoader(const char * dir)16 DirectorySystemFontLoader(const char* dir) : fBaseDirectory(dir) { }
17
loadSystemFonts(const SkTypeface_FreeType::Scanner & scanner,SkFontMgr_Custom::Families * families) const18 void loadSystemFonts(const SkTypeface_FreeType::Scanner& scanner,
19 SkFontMgr_Custom::Families* families) const override
20 {
21 load_directory_fonts(scanner, fBaseDirectory, ".ttf", families);
22 load_directory_fonts(scanner, fBaseDirectory, ".ttc", families);
23 load_directory_fonts(scanner, fBaseDirectory, ".otf", families);
24 load_directory_fonts(scanner, fBaseDirectory, ".pfb", families);
25
26 if (families->empty()) {
27 SkFontStyleSet_Custom* family = new SkFontStyleSet_Custom(SkString());
28 families->push_back().reset(family);
29 family->appendTypeface(sk_make_sp<SkTypeface_Empty>());
30 }
31 }
32
33 private:
find_family(SkFontMgr_Custom::Families & families,const char familyName[])34 static SkFontStyleSet_Custom* find_family(SkFontMgr_Custom::Families& families,
35 const char familyName[])
36 {
37 for (int i = 0; i < families.count(); ++i) {
38 if (families[i]->getFamilyName().equals(familyName)) {
39 return families[i].get();
40 }
41 }
42 return nullptr;
43 }
44
load_directory_fonts(const SkTypeface_FreeType::Scanner & scanner,const SkString & directory,const char * suffix,SkFontMgr_Custom::Families * families)45 static void load_directory_fonts(const SkTypeface_FreeType::Scanner& scanner,
46 const SkString& directory, const char* suffix,
47 SkFontMgr_Custom::Families* families)
48 {
49 SkOSFile::Iter iter(directory.c_str(), suffix);
50 SkString name;
51
52 while (iter.next(&name, false)) {
53 SkString filename(SkOSPath::Join(directory.c_str(), name.c_str()));
54 std::unique_ptr<SkStreamAsset> stream = SkStream::MakeFromFile(filename.c_str());
55 if (!stream) {
56 // SkDebugf("---- failed to open <%s>\n", filename.c_str());
57 continue;
58 }
59
60 int numFaces;
61 if (!scanner.recognizedFont(stream.get(), &numFaces)) {
62 // SkDebugf("---- failed to open <%s> as a font\n", filename.c_str());
63 continue;
64 }
65
66 for (int faceIndex = 0; faceIndex < numFaces; ++faceIndex) {
67 bool isFixedPitch;
68 SkString realname;
69 SkFontStyle style = SkFontStyle(); // avoid uninitialized warning
70 if (!scanner.scanFont(stream.get(), faceIndex,
71 &realname, &style, &isFixedPitch, nullptr))
72 {
73 // SkDebugf("---- failed to open <%s> <%d> as a font\n",
74 // filename.c_str(), faceIndex);
75 continue;
76 }
77
78 SkFontStyleSet_Custom* addTo = find_family(*families, realname.c_str());
79 if (nullptr == addTo) {
80 addTo = new SkFontStyleSet_Custom(realname);
81 families->push_back().reset(addTo);
82 }
83 addTo->appendTypeface(sk_make_sp<SkTypeface_File>(style, isFixedPitch, true,
84 realname, filename.c_str(),
85 faceIndex));
86 }
87 }
88
89 SkOSFile::Iter dirIter(directory.c_str());
90 while (dirIter.next(&name, true)) {
91 if (name.startsWith(".")) {
92 continue;
93 }
94 SkString dirname(SkOSPath::Join(directory.c_str(), name.c_str()));
95 load_directory_fonts(scanner, dirname, suffix, families);
96 }
97 }
98
99 SkString fBaseDirectory;
100 };
101
SkFontMgr_New_Custom_Directory(const char * dir)102 SK_API sk_sp<SkFontMgr> SkFontMgr_New_Custom_Directory(const char* dir) {
103 return sk_make_sp<SkFontMgr_Custom>(DirectorySystemFontLoader(dir));
104 }
105