Ben Wagner | 8ab590f | 2017-02-08 17:29:33 -0500 | [diff] [blame] | 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 "SkFontMgr_custom.h" |
| 9 | #include "SkFontMgr_directory.h" |
| 10 | #include "SkOSFile.h" |
| 11 | #include "SkOSPath.h" |
| 12 | #include "SkStream.h" |
| 13 | |
| 14 | class DirectorySystemFontLoader : public SkFontMgr_Custom::SystemFontLoader { |
| 15 | public: |
| 16 | DirectorySystemFontLoader(const char* dir) : fBaseDirectory(dir) { } |
| 17 | |
| 18 | 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: |
| 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 | |
| 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 | |
| 102 | SK_API sk_sp<SkFontMgr> SkFontMgr_New_Custom_Directory(const char* dir) { |
| 103 | return sk_make_sp<SkFontMgr_Custom>(DirectorySystemFontLoader(dir)); |
| 104 | } |