diff options
Diffstat (limited to 'src/ports/SkFontMgr_custom_directory.cpp')
-rw-r--r-- | src/ports/SkFontMgr_custom_directory.cpp | 104 |
1 files changed, 104 insertions, 0 deletions
diff --git a/src/ports/SkFontMgr_custom_directory.cpp b/src/ports/SkFontMgr_custom_directory.cpp new file mode 100644 index 0000000000..af322875f3 --- /dev/null +++ b/src/ports/SkFontMgr_custom_directory.cpp @@ -0,0 +1,104 @@ +/* + * Copyright 2017 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "SkFontMgr_custom.h" +#include "SkFontMgr_directory.h" +#include "SkOSFile.h" +#include "SkOSPath.h" +#include "SkStream.h" + +class DirectorySystemFontLoader : public SkFontMgr_Custom::SystemFontLoader { +public: + DirectorySystemFontLoader(const char* dir) : fBaseDirectory(dir) { } + + void loadSystemFonts(const SkTypeface_FreeType::Scanner& scanner, + SkFontMgr_Custom::Families* families) const override + { + load_directory_fonts(scanner, fBaseDirectory, ".ttf", families); + load_directory_fonts(scanner, fBaseDirectory, ".ttc", families); + load_directory_fonts(scanner, fBaseDirectory, ".otf", families); + load_directory_fonts(scanner, fBaseDirectory, ".pfb", families); + + if (families->empty()) { + SkFontStyleSet_Custom* family = new SkFontStyleSet_Custom(SkString()); + families->push_back().reset(family); + family->appendTypeface(sk_make_sp<SkTypeface_Empty>()); + } + } + +private: + static SkFontStyleSet_Custom* find_family(SkFontMgr_Custom::Families& families, + const char familyName[]) + { + for (int i = 0; i < families.count(); ++i) { + if (families[i]->getFamilyName().equals(familyName)) { + return families[i].get(); + } + } + return nullptr; + } + + static void load_directory_fonts(const SkTypeface_FreeType::Scanner& scanner, + const SkString& directory, const char* suffix, + SkFontMgr_Custom::Families* families) + { + SkOSFile::Iter iter(directory.c_str(), suffix); + SkString name; + + while (iter.next(&name, false)) { + SkString filename(SkOSPath::Join(directory.c_str(), name.c_str())); + std::unique_ptr<SkStreamAsset> stream = SkStream::MakeFromFile(filename.c_str()); + if (!stream) { + SkDebugf("---- failed to open <%s>\n", filename.c_str()); + continue; + } + + int numFaces; + if (!scanner.recognizedFont(stream.get(), &numFaces)) { + SkDebugf("---- failed to open <%s> as a font\n", filename.c_str()); + continue; + } + + for (int faceIndex = 0; faceIndex < numFaces; ++faceIndex) { + bool isFixedPitch; + SkString realname; + SkFontStyle style = SkFontStyle(); // avoid uninitialized warning + if (!scanner.scanFont(stream.get(), faceIndex, + &realname, &style, &isFixedPitch, nullptr)) + { + SkDebugf("---- failed to open <%s> <%d> as a font\n", + filename.c_str(), faceIndex); + continue; + } + + SkFontStyleSet_Custom* addTo = find_family(*families, realname.c_str()); + if (nullptr == addTo) { + addTo = new SkFontStyleSet_Custom(realname); + families->push_back().reset(addTo); + } + addTo->appendTypeface(sk_make_sp<SkTypeface_File>(style, isFixedPitch, true, + realname, filename.c_str(), + faceIndex)); + } + } + + SkOSFile::Iter dirIter(directory.c_str()); + while (dirIter.next(&name, true)) { + if (name.startsWith(".")) { + continue; + } + SkString dirname(SkOSPath::Join(directory.c_str(), name.c_str())); + load_directory_fonts(scanner, dirname, suffix, families); + } + } + + SkString fBaseDirectory; +}; + +SK_API sk_sp<SkFontMgr> SkFontMgr_New_Custom_Directory(const char* dir) { + return sk_make_sp<SkFontMgr_Custom>(DirectorySystemFontLoader(dir)); +} |