| /* |
| * 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 "SkFontConfigParser_android.h" |
| #include "SkFontDescriptor.h" |
| #include "SkFontHost_FreeType_common.h" |
| #include "SkFontMgr.h" |
| #include "SkFontStyle.h" |
| #include "SkStream.h" |
| #include "SkTDArray.h" |
| #include "SkTSearch.h" |
| #include "SkTypeface.h" |
| #include "SkTypeface_android.h" |
| #include "SkTypefaceCache.h" |
| |
| #include <limits> |
| #include <stdlib.h> |
| |
| #ifndef SK_FONT_FILE_PREFIX |
| # define SK_FONT_FILE_PREFIX "/fonts/" |
| #endif |
| |
| #ifndef SK_DEBUG_FONTS |
| #define SK_DEBUG_FONTS 0 |
| #endif |
| |
| #if SK_DEBUG_FONTS |
| # define DEBUG_FONT(args) SkDebugf args |
| #else |
| # define DEBUG_FONT(args) |
| #endif |
| |
| // For test only. |
| static const char* gTestMainConfigFile = NULL; |
| static const char* gTestFallbackConfigFile = NULL; |
| static const char* gTestFontFilePrefix = NULL; |
| |
| class SkTypeface_Android : public SkTypeface_FreeType { |
| public: |
| SkTypeface_Android(int index, |
| Style style, |
| bool isFixedPitch, |
| const SkString familyName) |
| : INHERITED(style, SkTypefaceCache::NewFontID(), isFixedPitch) |
| , fIndex(index) |
| , fFamilyName(familyName) { } |
| |
| const SkString& name() const { return fFamilyName; } |
| |
| protected: |
| int fIndex; |
| SkString fFamilyName; |
| |
| private: |
| typedef SkTypeface_FreeType INHERITED; |
| }; |
| |
| class SkTypeface_AndroidSystem : public SkTypeface_Android { |
| public: |
| SkTypeface_AndroidSystem(const SkString pathName, |
| int index, |
| Style style, |
| bool isFixedPitch, |
| const SkString familyName, |
| const SkLanguage& lang, |
| FontVariant variantStyle) |
| : INHERITED(index, style, isFixedPitch, familyName) |
| , fPathName(pathName) |
| , fLang(lang) |
| , fVariantStyle(variantStyle) { } |
| |
| virtual void onGetFontDescriptor(SkFontDescriptor* desc, |
| bool* serialize) const SK_OVERRIDE { |
| SkASSERT(desc); |
| SkASSERT(serialize); |
| desc->setFamilyName(fFamilyName.c_str()); |
| desc->setFontFileName(fPathName.c_str()); |
| *serialize = false; |
| } |
| virtual SkStream* onOpenStream(int* ttcIndex) const SK_OVERRIDE { |
| *ttcIndex = fIndex; |
| return SkStream::NewFromFile(fPathName.c_str()); |
| } |
| |
| const SkString fPathName; |
| const SkLanguage fLang; |
| const FontVariant fVariantStyle; |
| |
| typedef SkTypeface_Android INHERITED; |
| }; |
| |
| class SkTypeface_AndroidStream : public SkTypeface_Android { |
| public: |
| SkTypeface_AndroidStream(SkStream* stream, |
| int index, |
| Style style, |
| bool isFixedPitch, |
| const SkString familyName) |
| : INHERITED(index, style, isFixedPitch, familyName) |
| , fStream(SkRef(stream)) { } |
| |
| virtual void onGetFontDescriptor(SkFontDescriptor* desc, |
| bool* serialize) const SK_OVERRIDE { |
| SkASSERT(desc); |
| SkASSERT(serialize); |
| desc->setFamilyName(fFamilyName.c_str()); |
| desc->setFontFileName(NULL); |
| *serialize = true; |
| } |
| |
| virtual SkStream* onOpenStream(int* ttcIndex) const SK_OVERRIDE { |
| *ttcIndex = fIndex; |
| return fStream->duplicate(); |
| } |
| |
| private: |
| SkAutoTUnref<SkStream> fStream; |
| |
| typedef SkTypeface_Android INHERITED; |
| }; |
| |
| void get_path_for_sys_fonts(const char* basePath, const SkString& name, SkString* full) { |
| if (basePath) { |
| full->set(basePath); |
| } else { |
| full->set(getenv("ANDROID_ROOT")); |
| full->append(SK_FONT_FILE_PREFIX); |
| } |
| full->append(name); |
| } |
| |
| class SkFontStyleSet_Android : public SkFontStyleSet { |
| public: |
| explicit SkFontStyleSet_Android(const FontFamily& family, const char* basePath) { |
| const SkString* cannonicalFamilyName = NULL; |
| if (family.fNames.count() > 0) { |
| cannonicalFamilyName = &family.fNames[0]; |
| } |
| // TODO? make this lazy |
| for (int i = 0; i < family.fFonts.count(); ++i) { |
| const FontFileInfo& fontFile = family.fFonts[i]; |
| |
| SkString pathName; |
| get_path_for_sys_fonts(basePath, fontFile.fFileName, &pathName); |
| |
| SkAutoTUnref<SkStream> stream(SkStream::NewFromFile(pathName.c_str())); |
| if (!stream.get()) { |
| DEBUG_FONT(("---- SystemFonts[%d] file=%s (NOT EXIST)", i, pathName.c_str())); |
| continue; |
| } |
| |
| const int ttcIndex = fontFile.fIndex; |
| SkString familyName; |
| SkTypeface::Style style; |
| bool isFixedWidth; |
| if (!SkTypeface_FreeType::ScanFont(stream.get(), ttcIndex, |
| &familyName, &style, &isFixedWidth)) { |
| DEBUG_FONT(("---- SystemFonts[%d] file=%s (INVALID)", i, pathName.c_str())); |
| continue; |
| } |
| |
| const SkLanguage& lang = family.fLanguage; |
| 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 != NULL) { |
| familyName = *cannonicalFamilyName; |
| } |
| |
| fStyles.push_back().reset(SkNEW_ARGS(SkTypeface_AndroidSystem, |
| (pathName, ttcIndex, |
| style, isFixedWidth, familyName, |
| lang, variant))); |
| } |
| } |
| |
| virtual int count() SK_OVERRIDE { |
| return fStyles.count(); |
| } |
| virtual void getStyle(int index, SkFontStyle* style, SkString* name) SK_OVERRIDE { |
| if (index < 0 || fStyles.count() <= index) { |
| return; |
| } |
| if (style) { |
| *style = this->style(index); |
| } |
| if (name) { |
| name->reset(); |
| } |
| } |
| virtual SkTypeface_AndroidSystem* createTypeface(int index) SK_OVERRIDE { |
| if (index < 0 || fStyles.count() <= index) { |
| return NULL; |
| } |
| return SkRef(fStyles[index].get()); |
| } |
| |
| /** Find the typeface in this style set that most closely matches the given pattern. |
| * TODO: consider replacing with SkStyleSet_Indirect::matchStyle(); |
| * this simpler version using match_score() passes all our tests. |
| */ |
| virtual SkTypeface_AndroidSystem* matchStyle(const SkFontStyle& pattern) SK_OVERRIDE { |
| if (0 == fStyles.count()) { |
| return NULL; |
| } |
| SkTypeface_AndroidSystem* closest = fStyles[0]; |
| int minScore = std::numeric_limits<int>::max(); |
| for (int i = 0; i < fStyles.count(); ++i) { |
| SkFontStyle style = this->style(i); |
| int score = match_score(pattern, style); |
| if (score < minScore) { |
| closest = fStyles[i]; |
| minScore = score; |
| } |
| } |
| return SkRef(closest); |
| } |
| |
| private: |
| SkFontStyle style(int index) { |
| return SkFontStyle(this->weight(index), SkFontStyle::kNormal_Width, |
| this->slant(index)); |
| } |
| SkFontStyle::Weight weight(int index) { |
| if (fStyles[index]->isBold()) return SkFontStyle::kBold_Weight; |
| return SkFontStyle::kNormal_Weight; |
| } |
| SkFontStyle::Slant slant(int index) { |
| if (fStyles[index]->isItalic()) return SkFontStyle::kItalic_Slant; |
| return SkFontStyle::kUpright_Slant; |
| } |
| static int match_score(const SkFontStyle& pattern, const SkFontStyle& candidate) { |
| int score = 0; |
| score += abs((pattern.width() - candidate.width()) * 100); |
| score += abs((pattern.isItalic() == candidate.isItalic()) ? 0 : 1000); |
| score += abs(pattern.weight() - candidate.weight()); |
| return score; |
| } |
| |
| SkTArray<SkAutoTUnref<SkTypeface_AndroidSystem>, true> fStyles; |
| |
| friend struct NameToFamily; |
| friend class SkFontMgr_Android; |
| |
| typedef SkFontStyleSet INHERITED; |
| }; |
| |
| /** 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() { |
| SkTDArray<FontFamily*> fontFamilies; |
| SkFontConfigParser::GetFontFamilies(fontFamilies); |
| this->buildNameToFamilyMap(fontFamilies, NULL); |
| this->findDefaultFont(); |
| } |
| SkFontMgr_Android(const char* mainConfigFile, const char* fallbackConfigFile, |
| const char* basePath) |
| { |
| SkTDArray<FontFamily*> fontFamilies; |
| SkFontConfigParser::GetTestFontFamilies(fontFamilies, mainConfigFile, fallbackConfigFile); |
| this->buildNameToFamilyMap(fontFamilies, basePath); |
| this->findDefaultFont(); |
| } |
| |
| protected: |
| /** Returns not how many families we have, but how many unique names |
| * exist among the families. |
| */ |
| virtual int onCountFamilies() const SK_OVERRIDE { |
| return fNameToFamilyMap.count(); |
| } |
| |
| virtual void onGetFamilyName(int index, SkString* familyName) const SK_OVERRIDE { |
| if (index < 0 || fNameToFamilyMap.count() <= index) { |
| familyName->reset(); |
| return; |
| } |
| familyName->set(fNameToFamilyMap[index].name); |
| } |
| |
| virtual SkFontStyleSet* onCreateStyleSet(int index) const SK_OVERRIDE { |
| if (index < 0 || fNameToFamilyMap.count() <= index) { |
| return NULL; |
| } |
| return SkRef(fNameToFamilyMap[index].styleSet); |
| } |
| |
| virtual SkFontStyleSet* onMatchFamily(const char familyName[]) const SK_OVERRIDE { |
| if (!familyName) { |
| return NULL; |
| } |
| SkAutoAsciiToLC tolc(familyName); |
| for (int i = 0; i < fNameToFamilyMap.count(); ++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.count(); ++i) { |
| if (fFallbackNameToFamilyMap[i].name.equals(tolc.lc())) { |
| return SkRef(fFallbackNameToFamilyMap[i].styleSet); |
| } |
| } |
| return NULL; |
| } |
| |
| virtual SkTypeface* onMatchFamilyStyle(const char familyName[], |
| const SkFontStyle& style) const SK_OVERRIDE { |
| SkAutoTUnref<SkFontStyleSet> sset(this->matchFamily(familyName)); |
| return sset->matchStyle(style); |
| } |
| |
| virtual SkTypeface* onMatchFaceStyle(const SkTypeface* typeface, |
| const SkFontStyle& style) const SK_OVERRIDE { |
| for (int i = 0; i < fFontStyleSets.count(); ++i) { |
| for (int j = 0; j < fFontStyleSets[i]->fStyles.count(); ++j) { |
| if (fFontStyleSets[i]->fStyles[j] == typeface) { |
| return fFontStyleSets[i]->matchStyle(style); |
| } |
| } |
| } |
| return NULL; |
| } |
| |
| virtual SkTypeface* onMatchFamilyStyleCharacter(const char familyName[], |
| const SkFontStyle& style, |
| const char bpc47[], |
| uint32_t character) const SK_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. |
| |
| // For compatibility, try 'elegant' fonts first in fallback. |
| uint32_t variantMask = kElegant_FontVariant; |
| |
| // The first time match anything in the mask, second time anything not in the mask. |
| for (bool maskMatches = true; maskMatches != false; maskMatches = false) { |
| SkLanguage lang(bpc47); |
| // Match against the language, removing a segment each time. |
| // The last time through the loop, the language will be empty. |
| // The empty language is special, and matches all languages. |
| do { |
| const SkString& langTag = lang.getTag(); |
| for (int i = 0; i < fFallbackNameToFamilyMap.count(); ++i) { |
| SkFontStyleSet_Android* family = fFallbackNameToFamilyMap[i].styleSet; |
| SkAutoTUnref<SkTypeface_AndroidSystem> face(family->matchStyle(style)); |
| |
| if (!langTag.isEmpty() && langTag != face->fLang.getTag()) { |
| continue; |
| } |
| |
| if (SkToBool(face->fVariantStyle & variantMask) != maskMatches) { |
| continue; |
| } |
| |
| SkPaint paint; |
| paint.setTypeface(face); |
| paint.setTextEncoding(SkPaint::kUTF32_TextEncoding); |
| |
| uint16_t glyphID; |
| paint.textToGlyphs(&character, sizeof(character), &glyphID); |
| if (glyphID != 0) { |
| return face.detach(); |
| } |
| } |
| } while (!lang.getTag().isEmpty() && (lang = lang.getParent(), true)); |
| } |
| return NULL; |
| } |
| |
| virtual SkTypeface* onCreateFromData(SkData* data, int ttcIndex) const SK_OVERRIDE { |
| SkAutoTUnref<SkStream> stream(new SkMemoryStream(data)); |
| return this->createFromStream(stream, ttcIndex); |
| } |
| |
| virtual SkTypeface* onCreateFromFile(const char path[], int ttcIndex) const SK_OVERRIDE { |
| SkAutoTUnref<SkStream> stream(SkStream::NewFromFile(path)); |
| return stream.get() ? this->createFromStream(stream, ttcIndex) : NULL; |
| } |
| |
| virtual SkTypeface* onCreateFromStream(SkStream* stream, int ttcIndex) const SK_OVERRIDE { |
| bool isFixedPitch; |
| SkTypeface::Style style; |
| SkString name; |
| if (!SkTypeface_FreeType::ScanFont(stream, ttcIndex, &name, &style, &isFixedPitch)) { |
| return NULL; |
| } |
| return SkNEW_ARGS(SkTypeface_AndroidStream, (stream, ttcIndex, |
| style, isFixedPitch, name)); |
| } |
| |
| |
| virtual SkTypeface* onLegacyCreateTypeface(const char familyName[], |
| unsigned styleBits) const SK_OVERRIDE { |
| SkTypeface::Style oldStyle = (SkTypeface::Style)styleBits; |
| SkFontStyle style = SkFontStyle(oldStyle & SkTypeface::kBold |
| ? SkFontStyle::kBold_Weight |
| : SkFontStyle::kNormal_Weight, |
| SkFontStyle::kNormal_Width, |
| oldStyle & SkTypeface::kItalic |
| ? SkFontStyle::kItalic_Slant |
| : SkFontStyle::kUpright_Slant); |
| |
| if (NULL != familyName) { |
| // On Android, we must return NULL 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 this->onMatchFamilyStyle(familyName, style); |
| } |
| return fDefaultFamily->matchStyle(style); |
| } |
| |
| |
| private: |
| |
| SkTArray<SkAutoTUnref<SkFontStyleSet_Android>, true> fFontStyleSets; |
| SkFontStyleSet* fDefaultFamily; |
| SkTypeface* fDefaultTypeface; |
| |
| SkTDArray<NameToFamily> fNameToFamilyMap; |
| SkTDArray<NameToFamily> fFallbackNameToFamilyMap; |
| |
| void buildNameToFamilyMap(SkTDArray<FontFamily*> families, const char* basePath) { |
| for (int i = 0; i < families.count(); i++) { |
| FontFamily& family = *families[i]; |
| |
| SkTDArray<NameToFamily>* nameToFamily = &fNameToFamilyMap; |
| if (family.fIsFallbackFont) { |
| nameToFamily = &fFallbackNameToFamilyMap; |
| |
| if (0 == family.fNames.count()) { |
| SkString& fallbackName = family.fNames.push_back(); |
| fallbackName.printf("%.2x##fallback", i); |
| } |
| } |
| |
| SkFontStyleSet_Android* newSet = SkNEW_ARGS(SkFontStyleSet_Android, (family, basePath)); |
| if (0 == newSet->count()) { |
| SkDELETE(newSet); |
| continue; |
| } |
| fFontStyleSets.push_back().reset(newSet); |
| |
| for (int j = 0; j < family.fNames.count(); j++) { |
| NameToFamily* nextEntry = nameToFamily->append(); |
| SkNEW_PLACEMENT_ARGS(&nextEntry->name, SkString, (family.fNames[j])); |
| nextEntry->styleSet = newSet; |
| } |
| } |
| } |
| |
| void findDefaultFont() { |
| SkASSERT(!fFontStyleSets.empty()); |
| |
| static const char* gDefaultNames[] = { "sans-serif" }; |
| for (size_t i = 0; i < SK_ARRAY_COUNT(gDefaultNames); ++i) { |
| SkFontStyleSet* set = this->onMatchFamily(gDefaultNames[i]); |
| if (NULL == set) { |
| continue; |
| } |
| SkTypeface* tf = set->matchStyle(SkFontStyle()); |
| if (NULL == tf) { |
| continue; |
| } |
| fDefaultFamily = set; |
| fDefaultTypeface = tf; |
| break; |
| } |
| if (NULL == fDefaultTypeface) { |
| fDefaultFamily = fFontStyleSets[0]; |
| fDefaultTypeface = fDefaultFamily->createTypeface(0); |
| } |
| SkASSERT(fDefaultFamily); |
| SkASSERT(fDefaultTypeface); |
| } |
| |
| typedef SkFontMgr INHERITED; |
| }; |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| SkFontMgr* SkFontMgr::Factory() { |
| // The call to SkGetTestFontConfiguration is so that Chromium can override the environment. |
| // TODO: these globals need to be removed, in favor of a constructor / separate Factory |
| // which can be used instead. |
| const char* mainConfigFile; |
| const char* fallbackConfigFile; |
| const char* basePath; |
| SkGetTestFontConfiguration(&mainConfigFile, &fallbackConfigFile, &basePath); |
| if (mainConfigFile) { |
| return SkNEW_ARGS(SkFontMgr_Android, (mainConfigFile, fallbackConfigFile, basePath)); |
| } |
| |
| return SkNEW(SkFontMgr_Android); |
| } |
| |
| void SkUseTestFontConfigFile(const char* mainconf, const char* fallbackconf, |
| const char* fontsdir) { |
| gTestMainConfigFile = mainconf; |
| gTestFallbackConfigFile = fallbackconf; |
| gTestFontFilePrefix = fontsdir; |
| SkASSERT(gTestMainConfigFile); |
| SkASSERT(gTestFallbackConfigFile); |
| SkASSERT(gTestFontFilePrefix); |
| SkDEBUGF(("Use Test Config File Main %s, Fallback %s, Font Dir %s", |
| gTestMainConfigFile, gTestFallbackConfigFile, gTestFontFilePrefix)); |
| } |
| |
| void SkGetTestFontConfiguration(const char** mainconf, const char** fallbackconf, |
| const char** fontsdir) { |
| *mainconf = gTestMainConfigFile; |
| *fallbackconf = gTestFallbackConfigFile; |
| *fontsdir = gTestFontFilePrefix; |
| } |
