| /* |
| * Copyright 2014 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #include "include/core/SkTypes.h" |
| |
| #include "include/core/SkData.h" |
| #include "include/core/SkFontMgr.h" |
| #include "include/core/SkFontStyle.h" |
| #include "include/core/SkPaint.h" |
| #include "include/core/SkRefCnt.h" |
| #include "include/core/SkStream.h" |
| #include "include/core/SkString.h" |
| #include "include/ports/SkFontMgr_android.h" |
| #include "include/private/SkFixed.h" |
| #include "include/private/base/SkTArray.h" |
| #include "include/private/base/SkTDArray.h" |
| #include "include/private/base/SkTemplates.h" |
| #include "src/base/SkTSearch.h" |
| #include "src/core/SkFontDescriptor.h" |
| #include "src/core/SkOSFile.h" |
| #include "src/core/SkTypefaceCache.h" |
| #include "src/ports/SkFontHost_FreeType_common.h" |
| #include "src/ports/SkFontMgr_android_parser.h" |
| |
| #include <algorithm> |
| #include <limits> |
| |
| using namespace skia_private; |
| |
| class SkData; |
| |
| class SkTypeface_Android : public SkTypeface_FreeType { |
| public: |
| SkTypeface_Android(const SkFontStyle& style, |
| bool isFixedPitch, |
| const SkString& familyName) |
| : INHERITED(style, isFixedPitch) |
| , fFamilyName(familyName) |
| { } |
| |
| protected: |
| void onGetFamilyName(SkString* familyName) const override { |
| *familyName = fFamilyName; |
| } |
| |
| SkString fFamilyName; |
| |
| private: |
| using INHERITED = SkTypeface_FreeType; |
| }; |
| |
| class SkTypeface_AndroidSystem : public SkTypeface_Android { |
| public: |
| SkTypeface_AndroidSystem(const SkString& pathName, |
| const bool cacheFontFiles, |
| int index, |
| const SkFixed* axes, int axesCount, |
| const SkFontStyle& style, |
| bool isFixedPitch, |
| const SkString& familyName, |
| const SkTArray<SkLanguage, true>& lang, |
| FontVariant variantStyle) |
| : INHERITED(style, isFixedPitch, familyName) |
| , fPathName(pathName) |
| , fIndex(index) |
| , fAxes(axes, axesCount) |
| , fLang(lang) |
| , fVariantStyle(variantStyle) |
| , fFile(cacheFontFiles ? sk_fopen(fPathName.c_str(), kRead_SkFILE_Flag) : nullptr) { |
| if (cacheFontFiles) { |
| SkASSERT(fFile); |
| } |
| } |
| |
| std::unique_ptr<SkStreamAsset> makeStream() const { |
| if (fFile) { |
| sk_sp<SkData> data(SkData::MakeFromFILE(fFile)); |
| return data ? std::make_unique<SkMemoryStream>(std::move(data)) : nullptr; |
| } |
| return SkStream::MakeFromFile(fPathName.c_str()); |
| } |
| |
| void onGetFontDescriptor(SkFontDescriptor* desc, bool* serialize) const override { |
| SkASSERT(desc); |
| SkASSERT(serialize); |
| desc->setFamilyName(fFamilyName.c_str()); |
| desc->setStyle(this->fontStyle()); |
| *serialize = false; |
| } |
| std::unique_ptr<SkStreamAsset> onOpenStream(int* ttcIndex) const override { |
| *ttcIndex = fIndex; |
| return this->makeStream(); |
| } |
| std::unique_ptr<SkFontData> onMakeFontData() const override { |
| return std::make_unique<SkFontData>( |
| this->makeStream(), fIndex, 0, fAxes.begin(), fAxes.size(), nullptr, 0); |
| } |
| sk_sp<SkTypeface> onMakeClone(const SkFontArguments& args) const override { |
| std::unique_ptr<SkFontData> data = this->cloneFontData(args); |
| if (!data) { |
| return nullptr; |
| } |
| return sk_make_sp<SkTypeface_AndroidSystem>(fPathName, |
| fFile, |
| fIndex, |
| data->getAxis(), |
| data->getAxisCount(), |
| this->fontStyle(), |
| this->isFixedPitch(), |
| fFamilyName, |
| fLang, |
| fVariantStyle); |
| } |
| |
| const SkString fPathName; |
| int fIndex; |
| const SkSTArray<4, SkFixed, true> fAxes; |
| const SkSTArray<4, SkLanguage, true> fLang; |
| const FontVariant fVariantStyle; |
| SkAutoTCallVProc<FILE, sk_fclose> fFile; |
| |
| using INHERITED = SkTypeface_Android; |
| }; |
| |
| class SkTypeface_AndroidStream : public SkTypeface_Android { |
| public: |
| SkTypeface_AndroidStream(std::unique_ptr<SkFontData> data, |
| const SkFontStyle& style, |
| bool isFixedPitch, |
| const SkString& familyName) |
| : INHERITED(style, isFixedPitch, familyName) |
| , fData(std::move(data)) |
| { } |
| |
| void onGetFontDescriptor(SkFontDescriptor* desc, bool* serialize) const override { |
| SkASSERT(desc); |
| SkASSERT(serialize); |
| desc->setFamilyName(fFamilyName.c_str()); |
| SkTypeface_FreeType::FontDataPaletteToDescriptorPalette(*fData, desc); |
| *serialize = true; |
| } |
| |
| std::unique_ptr<SkStreamAsset> onOpenStream(int* ttcIndex) const override { |
| *ttcIndex = fData->getIndex(); |
| return fData->getStream()->duplicate(); |
| } |
| |
| std::unique_ptr<SkFontData> onMakeFontData() const override { |
| return std::make_unique<SkFontData>(*fData); |
| } |
| |
| sk_sp<SkTypeface> onMakeClone(const SkFontArguments& args) const override { |
| std::unique_ptr<SkFontData> data = this->cloneFontData(args); |
| if (!data) { |
| return nullptr; |
| } |
| return sk_make_sp<SkTypeface_AndroidStream>(std::move(data), |
| this->fontStyle(), |
| this->isFixedPitch(), |
| fFamilyName); |
| } |
| |
| private: |
| const std::unique_ptr<const SkFontData> fData; |
| using INHERITED = SkTypeface_Android; |
| }; |
| |
| class SkFontStyleSet_Android : public SkFontStyleSet { |
| typedef SkTypeface_FreeType::Scanner Scanner; |
| |
| public: |
| explicit SkFontStyleSet_Android(const FontFamily& family, const Scanner& scanner, |
| const bool cacheFontFiles) { |
| const SkString* cannonicalFamilyName = nullptr; |
| if (family.fNames.size() > 0) { |
| cannonicalFamilyName = &family.fNames[0]; |
| } |
| fFallbackFor = family.fFallbackFor; |
| |
| // TODO? make this lazy |
| for (int i = 0; i < family.fFonts.size(); ++i) { |
| const FontFileInfo& fontFile = family.fFonts[i]; |
| |
| SkString pathName(family.fBasePath); |
| pathName.append(fontFile.fFileName); |
| |
| std::unique_ptr<SkStreamAsset> stream = SkStream::MakeFromFile(pathName.c_str()); |
| if (!stream) { |
| SkDEBUGF("Requested font file %s does not exist or cannot be opened.\n", |
| pathName.c_str()); |
| continue; |
| } |
| |
| const int ttcIndex = fontFile.fIndex; |
| SkString familyName; |
| SkFontStyle style; |
| bool isFixedWidth; |
| Scanner::AxisDefinitions axisDefinitions; |
| if (!scanner.scanFont(stream.get(), ttcIndex, |
| &familyName, &style, &isFixedWidth, &axisDefinitions)) |
| { |
| SkDEBUGF("Requested font file %s exists, but is not a valid font.\n", |
| pathName.c_str()); |
| continue; |
| } |
| |
| int weight = fontFile.fWeight != 0 ? fontFile.fWeight : style.weight(); |
| SkFontStyle::Slant slant = style.slant(); |
| switch (fontFile.fStyle) { |
| case FontFileInfo::Style::kAuto: slant = style.slant(); break; |
| case FontFileInfo::Style::kNormal: slant = SkFontStyle::kUpright_Slant; break; |
| case FontFileInfo::Style::kItalic: slant = SkFontStyle::kItalic_Slant; break; |
| default: SkASSERT(false); break; |
| } |
| style = SkFontStyle(weight, style.width(), slant); |
| |
| uint32_t variant = family.fVariant; |
| if (kDefault_FontVariant == variant) { |
| variant = kCompact_FontVariant | kElegant_FontVariant; |
| } |
| |
| // The first specified family name overrides the family name found in the font. |
| // TODO: SkTypeface_AndroidSystem::onCreateFamilyNameIterator should return |
| // all of the specified family names in addition to the names found in the font. |
| if (cannonicalFamilyName != nullptr) { |
| familyName = *cannonicalFamilyName; |
| } |
| |
| AutoSTMalloc<4, SkFixed> axisValues(axisDefinitions.size()); |
| SkFontArguments::VariationPosition position = { |
| fontFile.fVariationDesignPosition.begin(), |
| fontFile.fVariationDesignPosition.size() |
| }; |
| Scanner::computeAxisValues(axisDefinitions, position, |
| axisValues, familyName); |
| |
| fStyles.push_back().reset(new SkTypeface_AndroidSystem( |
| pathName, cacheFontFiles, ttcIndex, axisValues.get(), axisDefinitions.size(), |
| style, isFixedWidth, familyName, family.fLanguages, variant)); |
| } |
| } |
| |
| int count() override { |
| return fStyles.size(); |
| } |
| void getStyle(int index, SkFontStyle* style, SkString* name) override { |
| if (index < 0 || fStyles.size() <= index) { |
| return; |
| } |
| if (style) { |
| *style = fStyles[index]->fontStyle(); |
| } |
| if (name) { |
| name->reset(); |
| } |
| } |
| SkTypeface_AndroidSystem* createTypeface(int index) override { |
| if (index < 0 || fStyles.size() <= index) { |
| return nullptr; |
| } |
| return SkRef(fStyles[index].get()); |
| } |
| |
| SkTypeface_AndroidSystem* matchStyle(const SkFontStyle& pattern) override { |
| return static_cast<SkTypeface_AndroidSystem*>(this->matchStyleCSS3(pattern)); |
| } |
| |
| private: |
| SkTArray<sk_sp<SkTypeface_AndroidSystem>> fStyles; |
| SkString fFallbackFor; |
| |
| friend struct NameToFamily; |
| friend class SkFontMgr_Android; |
| |
| using INHERITED = SkFontStyleSet; |
| }; |
| |
| /** On Android a single family can have many names, but our API assumes unique names. |
| * Map names to the back end so that all names for a given family refer to the same |
| * (non-replicated) set of typefaces. |
| * SkTDict<> doesn't let us do index-based lookup, so we write our own mapping. |
| */ |
| struct NameToFamily { |
| SkString name; |
| SkFontStyleSet_Android* styleSet; |
| }; |
| |
| class SkFontMgr_Android : public SkFontMgr { |
| public: |
| SkFontMgr_Android(const SkFontMgr_Android_CustomFonts* custom) { |
| SkTDArray<FontFamily*> families; |
| if (custom && SkFontMgr_Android_CustomFonts::kPreferSystem != custom->fSystemFontUse) { |
| SkString base(custom->fBasePath); |
| SkFontMgr_Android_Parser::GetCustomFontFamilies( |
| families, base, custom->fFontsXml, custom->fFallbackFontsXml); |
| } |
| if (!custom || |
| (custom && SkFontMgr_Android_CustomFonts::kOnlyCustom != custom->fSystemFontUse)) |
| { |
| SkFontMgr_Android_Parser::GetSystemFontFamilies(families); |
| } |
| if (custom && SkFontMgr_Android_CustomFonts::kPreferSystem == custom->fSystemFontUse) { |
| SkString base(custom->fBasePath); |
| SkFontMgr_Android_Parser::GetCustomFontFamilies( |
| families, base, custom->fFontsXml, custom->fFallbackFontsXml); |
| } |
| this->buildNameToFamilyMap(families, custom ? custom->fIsolated : false); |
| this->findDefaultStyleSet(); |
| for (FontFamily* p : families) { |
| delete p; |
| } |
| families.reset(); |
| } |
| |
| protected: |
| /** Returns not how many families we have, but how many unique names |
| * exist among the families. |
| */ |
| int onCountFamilies() const override { |
| return fNameToFamilyMap.size(); |
| } |
| |
| void onGetFamilyName(int index, SkString* familyName) const override { |
| if (index < 0 || fNameToFamilyMap.size() <= index) { |
| familyName->reset(); |
| return; |
| } |
| familyName->set(fNameToFamilyMap[index].name); |
| } |
| |
| SkFontStyleSet* onCreateStyleSet(int index) const override { |
| if (index < 0 || fNameToFamilyMap.size() <= index) { |
| return nullptr; |
| } |
| return SkRef(fNameToFamilyMap[index].styleSet); |
| } |
| |
| SkFontStyleSet* onMatchFamily(const char familyName[]) const override { |
| if (!familyName) { |
| return nullptr; |
| } |
| SkAutoAsciiToLC tolc(familyName); |
| for (int i = 0; i < fNameToFamilyMap.size(); ++i) { |
| if (fNameToFamilyMap[i].name.equals(tolc.lc())) { |
| return SkRef(fNameToFamilyMap[i].styleSet); |
| } |
| } |
| // TODO: eventually we should not need to name fallback families. |
| for (int i = 0; i < fFallbackNameToFamilyMap.size(); ++i) { |
| if (fFallbackNameToFamilyMap[i].name.equals(tolc.lc())) { |
| return SkRef(fFallbackNameToFamilyMap[i].styleSet); |
| } |
| } |
| return nullptr; |
| } |
| |
| SkTypeface* onMatchFamilyStyle(const char familyName[], |
| const SkFontStyle& style) const override { |
| sk_sp<SkFontStyleSet> sset(this->matchFamily(familyName)); |
| return sset->matchStyle(style); |
| } |
| |
| static sk_sp<SkTypeface_AndroidSystem> find_family_style_character( |
| const SkString& familyName, |
| const SkTArray<NameToFamily, true>& fallbackNameToFamilyMap, |
| const SkFontStyle& style, bool elegant, |
| const SkString& langTag, SkUnichar character) |
| { |
| for (int i = 0; i < fallbackNameToFamilyMap.size(); ++i) { |
| SkFontStyleSet_Android* family = fallbackNameToFamilyMap[i].styleSet; |
| if (familyName != family->fFallbackFor) { |
| continue; |
| } |
| sk_sp<SkTypeface_AndroidSystem> face(family->matchStyle(style)); |
| |
| if (!langTag.isEmpty() && |
| std::none_of(face->fLang.begin(), face->fLang.end(), [&](SkLanguage lang){ |
| return lang.getTag().startsWith(langTag.c_str()); |
| })) |
| { |
| continue; |
| } |
| |
| if (SkToBool(face->fVariantStyle & kElegant_FontVariant) != elegant) { |
| continue; |
| } |
| |
| if (face->unicharToGlyph(character) != 0) { |
| return face; |
| } |
| } |
| return nullptr; |
| } |
| |
| SkTypeface* onMatchFamilyStyleCharacter(const char familyName[], |
| const SkFontStyle& style, |
| const char* bcp47[], |
| int bcp47Count, |
| SkUnichar character) const override { |
| // The variant 'elegant' is 'not squashed', 'compact' is 'stays in ascent/descent'. |
| // The variant 'default' means 'compact and elegant'. |
| // As a result, it is not possible to know the variant context from the font alone. |
| // TODO: add 'is_elegant' and 'is_compact' bits to 'style' request. |
| |
| SkString familyNameString(familyName); |
| for (const SkString& currentFamilyName : { familyNameString, SkString() }) { |
| // The first time match anything elegant, second time anything not elegant. |
| for (int elegant = 2; elegant --> 0;) { |
| for (int bcp47Index = bcp47Count; bcp47Index --> 0;) { |
| SkLanguage lang(bcp47[bcp47Index]); |
| while (!lang.getTag().isEmpty()) { |
| sk_sp<SkTypeface_AndroidSystem> matchingTypeface = |
| find_family_style_character(currentFamilyName, fFallbackNameToFamilyMap, |
| style, SkToBool(elegant), |
| lang.getTag(), character); |
| if (matchingTypeface) { |
| return matchingTypeface.release(); |
| } |
| |
| lang = lang.getParent(); |
| } |
| } |
| sk_sp<SkTypeface_AndroidSystem> matchingTypeface = |
| find_family_style_character(currentFamilyName, fFallbackNameToFamilyMap, |
| style, SkToBool(elegant), |
| SkString(), character); |
| if (matchingTypeface) { |
| return matchingTypeface.release(); |
| } |
| } |
| } |
| return nullptr; |
| } |
| |
| sk_sp<SkTypeface> onMakeFromData(sk_sp<SkData> data, int ttcIndex) const override { |
| return this->makeFromStream(std::unique_ptr<SkStreamAsset>(new SkMemoryStream(std::move(data))), |
| ttcIndex); |
| } |
| |
| sk_sp<SkTypeface> onMakeFromFile(const char path[], int ttcIndex) const override { |
| std::unique_ptr<SkStreamAsset> stream = SkStream::MakeFromFile(path); |
| return stream ? this->makeFromStream(std::move(stream), ttcIndex) : nullptr; |
| } |
| |
| sk_sp<SkTypeface> onMakeFromStreamIndex(std::unique_ptr<SkStreamAsset> stream, |
| int ttcIndex) const override { |
| bool isFixedPitch; |
| SkFontStyle style; |
| SkString name; |
| if (!fScanner.scanFont(stream.get(), ttcIndex, &name, &style, &isFixedPitch, nullptr)) { |
| return nullptr; |
| } |
| auto data = std::make_unique<SkFontData>(std::move(stream), ttcIndex, 0, |
| nullptr, 0, nullptr, 0); |
| return sk_sp<SkTypeface>(new SkTypeface_AndroidStream(std::move(data), |
| style, isFixedPitch, name)); |
| } |
| |
| sk_sp<SkTypeface> onMakeFromStreamArgs(std::unique_ptr<SkStreamAsset> stream, |
| const SkFontArguments& args) const override { |
| using Scanner = SkTypeface_FreeType::Scanner; |
| bool isFixedPitch; |
| SkFontStyle style; |
| SkString name; |
| Scanner::AxisDefinitions axisDefinitions; |
| if (!fScanner.scanFont(stream.get(), args.getCollectionIndex(), |
| &name, &style, &isFixedPitch, &axisDefinitions)) |
| { |
| return nullptr; |
| } |
| |
| AutoSTMalloc<4, SkFixed> axisValues(axisDefinitions.size()); |
| Scanner::computeAxisValues(axisDefinitions, args.getVariationDesignPosition(), |
| axisValues, name); |
| |
| auto data = std::make_unique<SkFontData>( |
| std::move(stream), args.getCollectionIndex(), args.getPalette().index, |
| axisValues.get(), axisDefinitions.size(), |
| args.getPalette().overrides, args.getPalette().overrideCount); |
| return sk_sp<SkTypeface>(new SkTypeface_AndroidStream(std::move(data), |
| style, isFixedPitch, name)); |
| } |
| |
| sk_sp<SkTypeface> onLegacyMakeTypeface(const char familyName[], SkFontStyle style) const override { |
| if (familyName) { |
| // On Android, we must return nullptr when we can't find the requested |
| // named typeface so that the system/app can provide their own recovery |
| // mechanism. On other platforms we'd provide a typeface from the |
| // default family instead. |
| return sk_sp<SkTypeface>(this->onMatchFamilyStyle(familyName, style)); |
| } |
| return sk_sp<SkTypeface>(fDefaultStyleSet->matchStyle(style)); |
| } |
| |
| |
| private: |
| |
| SkTypeface_FreeType::Scanner fScanner; |
| |
| SkTArray<sk_sp<SkFontStyleSet_Android>> fStyleSets; |
| sk_sp<SkFontStyleSet> fDefaultStyleSet; |
| |
| SkTArray<NameToFamily, true> fNameToFamilyMap; |
| SkTArray<NameToFamily, true> fFallbackNameToFamilyMap; |
| |
| void addFamily(FontFamily& family, const bool isolated, int familyIndex) { |
| SkTArray<NameToFamily, true>* nameToFamily = &fNameToFamilyMap; |
| if (family.fIsFallbackFont) { |
| nameToFamily = &fFallbackNameToFamilyMap; |
| |
| if (0 == family.fNames.size()) { |
| SkString& fallbackName = family.fNames.push_back(); |
| fallbackName.printf("%.2x##fallback", familyIndex); |
| } |
| } |
| |
| sk_sp<SkFontStyleSet_Android> newSet = |
| sk_make_sp<SkFontStyleSet_Android>(family, fScanner, isolated); |
| if (0 == newSet->count()) { |
| return; |
| } |
| |
| for (const SkString& name : family.fNames) { |
| nameToFamily->emplace_back(NameToFamily{name, newSet.get()}); |
| } |
| fStyleSets.emplace_back(std::move(newSet)); |
| } |
| void buildNameToFamilyMap(SkTDArray<FontFamily*> families, const bool isolated) { |
| int familyIndex = 0; |
| for (FontFamily* family : families) { |
| addFamily(*family, isolated, familyIndex++); |
| for (const auto& [unused, fallbackFamily] : family->fallbackFamilies) { |
| addFamily(*fallbackFamily, isolated, familyIndex++); |
| } |
| } |
| } |
| |
| void findDefaultStyleSet() { |
| SkASSERT(!fStyleSets.empty()); |
| |
| static const char* defaultNames[] = { "sans-serif" }; |
| for (const char* defaultName : defaultNames) { |
| fDefaultStyleSet.reset(this->onMatchFamily(defaultName)); |
| if (fDefaultStyleSet) { |
| break; |
| } |
| } |
| if (nullptr == fDefaultStyleSet) { |
| fDefaultStyleSet = fStyleSets[0]; |
| } |
| SkASSERT(fDefaultStyleSet); |
| } |
| |
| using INHERITED = SkFontMgr; |
| }; |
| |
| #ifdef SK_DEBUG |
| static char const * const gSystemFontUseStrings[] = { |
| "OnlyCustom", "PreferCustom", "PreferSystem" |
| }; |
| #endif |
| |
| sk_sp<SkFontMgr> SkFontMgr_New_Android(const SkFontMgr_Android_CustomFonts* custom) { |
| if (custom) { |
| SkASSERT(0 <= custom->fSystemFontUse); |
| SkASSERT(custom->fSystemFontUse < std::size(gSystemFontUseStrings)); |
| SkDEBUGF("SystemFontUse: %s BasePath: %s Fonts: %s FallbackFonts: %s\n", |
| gSystemFontUseStrings[custom->fSystemFontUse], |
| custom->fBasePath, |
| custom->fFontsXml, |
| custom->fFallbackFontsXml); |
| } |
| return sk_make_sp<SkFontMgr_Android>(custom); |
| } |