| /* |
| * Copyright 2013 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #ifndef SkFontMgr_DEFINED |
| #define SkFontMgr_DEFINED |
| |
| #include "include/core/SkFontArguments.h" |
| #include "include/core/SkFontStyle.h" |
| #include "include/core/SkRefCnt.h" |
| #include "include/core/SkTypes.h" |
| |
| class SkData; |
| class SkFontData; |
| class SkStreamAsset; |
| class SkString; |
| class SkTypeface; |
| |
| class SK_API SkFontStyleSet : public SkRefCnt { |
| public: |
| virtual int count() = 0; |
| virtual void getStyle(int index, SkFontStyle*, SkString* style) = 0; |
| virtual SkTypeface* createTypeface(int index) = 0; |
| virtual SkTypeface* matchStyle(const SkFontStyle& pattern) = 0; |
| |
| static SkFontStyleSet* CreateEmpty(); |
| |
| protected: |
| SkTypeface* matchStyleCSS3(const SkFontStyle& pattern); |
| |
| private: |
| typedef SkRefCnt INHERITED; |
| }; |
| |
| class SK_API SkFontMgr : public SkRefCnt { |
| public: |
| int countFamilies() const; |
| void getFamilyName(int index, SkString* familyName) const; |
| SkFontStyleSet* createStyleSet(int index) const; |
| |
| /** |
| * The caller must call unref() on the returned object. |
| * Never returns NULL; will return an empty set if the name is not found. |
| * |
| * Passing nullptr as the parameter will return the default system family. |
| * Note that most systems don't have a default system family, so passing nullptr will often |
| * result in the empty set. |
| * |
| * It is possible that this will return a style set not accessible from |
| * createStyleSet(int) due to hidden or auto-activated fonts. |
| */ |
| SkFontStyleSet* matchFamily(const char familyName[]) const; |
| |
| /** |
| * Find the closest matching typeface to the specified familyName and style |
| * and return a ref to it. The caller must call unref() on the returned |
| * object. Will return nullptr if no 'good' match is found. |
| * |
| * Passing |nullptr| as the parameter for |familyName| will return the |
| * default system font. |
| * |
| * It is possible that this will return a style set not accessible from |
| * createStyleSet(int) or matchFamily(const char[]) due to hidden or |
| * auto-activated fonts. |
| */ |
| SkTypeface* matchFamilyStyle(const char familyName[], const SkFontStyle&) const; |
| |
| /** |
| * Use the system fallback to find a typeface for the given character. |
| * Note that bcp47 is a combination of ISO 639, 15924, and 3166-1 codes, |
| * so it is fine to just pass a ISO 639 here. |
| * |
| * Will return NULL if no family can be found for the character |
| * in the system fallback. |
| * |
| * Passing |nullptr| as the parameter for |familyName| will return the |
| * default system font. |
| * |
| * bcp47[0] is the least significant fallback, bcp47[bcp47Count-1] is the |
| * most significant. If no specified bcp47 codes match, any font with the |
| * requested character will be matched. |
| */ |
| SkTypeface* matchFamilyStyleCharacter(const char familyName[], const SkFontStyle&, |
| const char* bcp47[], int bcp47Count, |
| SkUnichar character) const; |
| |
| SkTypeface* matchFaceStyle(const SkTypeface*, const SkFontStyle&) const; |
| |
| /** |
| * Create a typeface for the specified data and TTC index (pass 0 for none) |
| * or NULL if the data is not recognized. The caller must call unref() on |
| * the returned object if it is not null. |
| */ |
| sk_sp<SkTypeface> makeFromData(sk_sp<SkData>, int ttcIndex = 0) const; |
| |
| /** |
| * Create a typeface for the specified stream and TTC index |
| * (pass 0 for none) or NULL if the stream is not recognized. The caller |
| * must call unref() on the returned object if it is not null. |
| */ |
| sk_sp<SkTypeface> makeFromStream(std::unique_ptr<SkStreamAsset>, int ttcIndex = 0) const; |
| |
| /* Experimental, API subject to change. */ |
| sk_sp<SkTypeface> makeFromStream(std::unique_ptr<SkStreamAsset>, const SkFontArguments&) const; |
| |
| /** |
| * Create a typeface from the specified font data. |
| * Will return NULL if the typeface could not be created. |
| * The caller must call unref() on the returned object if it is not null. |
| */ |
| sk_sp<SkTypeface> makeFromFontData(std::unique_ptr<SkFontData>) const; |
| |
| /** |
| * Create a typeface for the specified fileName and TTC index |
| * (pass 0 for none) or NULL if the file is not found, or its contents are |
| * not recognized. The caller must call unref() on the returned object |
| * if it is not null. |
| */ |
| sk_sp<SkTypeface> makeFromFile(const char path[], int ttcIndex = 0) const; |
| |
| sk_sp<SkTypeface> legacyMakeTypeface(const char familyName[], SkFontStyle style) const; |
| |
| /** Return the default fontmgr. */ |
| static sk_sp<SkFontMgr> RefDefault(); |
| |
| protected: |
| virtual int onCountFamilies() const = 0; |
| virtual void onGetFamilyName(int index, SkString* familyName) const = 0; |
| virtual SkFontStyleSet* onCreateStyleSet(int index)const = 0; |
| |
| /** May return NULL if the name is not found. */ |
| virtual SkFontStyleSet* onMatchFamily(const char familyName[]) const = 0; |
| |
| virtual SkTypeface* onMatchFamilyStyle(const char familyName[], |
| const SkFontStyle&) const = 0; |
| virtual SkTypeface* onMatchFamilyStyleCharacter(const char familyName[], const SkFontStyle&, |
| const char* bcp47[], int bcp47Count, |
| SkUnichar character) const = 0; |
| virtual SkTypeface* onMatchFaceStyle(const SkTypeface*, |
| const SkFontStyle&) const = 0; |
| |
| virtual sk_sp<SkTypeface> onMakeFromData(sk_sp<SkData>, int ttcIndex) const = 0; |
| virtual sk_sp<SkTypeface> onMakeFromStreamIndex(std::unique_ptr<SkStreamAsset>, |
| int ttcIndex) const = 0; |
| virtual sk_sp<SkTypeface> onMakeFromStreamArgs(std::unique_ptr<SkStreamAsset>, |
| const SkFontArguments&) const; |
| virtual sk_sp<SkTypeface> onMakeFromFontData(std::unique_ptr<SkFontData>) const; |
| virtual sk_sp<SkTypeface> onMakeFromFile(const char path[], int ttcIndex) const = 0; |
| |
| virtual sk_sp<SkTypeface> onLegacyMakeTypeface(const char familyName[], SkFontStyle) const = 0; |
| |
| private: |
| |
| /** Implemented by porting layer to return the default factory. */ |
| static sk_sp<SkFontMgr> Factory(); |
| |
| typedef SkRefCnt INHERITED; |
| }; |
| |
| #endif |