| /* |
| * 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 "SkRefCnt.h" |
| #include "SkFontStyle.h" |
| |
| class SkData; |
| class SkStream; |
| class SkString; |
| class SkTypeface; |
| |
| class SK_API SkFontStyleSet : public SkRefCnt { |
| public: |
| SK_DECLARE_INST_COUNT(SkFontStyleSet) |
| |
| 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(); |
| |
| private: |
| typedef SkRefCnt INHERITED; |
| }; |
| |
| class SkTypeface; |
| |
| class SK_API SkFontMgr : public SkRefCnt { |
| public: |
| SK_DECLARE_INST_COUNT(SkFontMgr) |
| |
| 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. |
| * |
| * 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 never return NULL, as it will return the default font if |
| * no matching font is found. |
| * |
| * 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 bpc47 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. |
| */ |
| SkTypeface* matchFamilyStyleCharacter(const char familyName[], const SkFontStyle&, |
| const char bpc47[], uint32_t 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. |
| */ |
| SkTypeface* createFromData(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. |
| */ |
| SkTypeface* createFromStream(SkStream*, int ttcIndex = 0) 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. |
| */ |
| SkTypeface* createFromFile(const char path[], int ttcIndex = 0) const; |
| |
| SkTypeface* legacyCreateTypeface(const char familyName[], |
| unsigned typefaceStyleBits) const; |
| |
| /** |
| * Return a ref to the default fontmgr. The caller must call unref() on |
| * the returned object. |
| */ |
| static 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; |
| // TODO: pure virtual, implement on all impls. |
| virtual SkTypeface* onMatchFamilyStyleCharacter(const char familyName[], const SkFontStyle&, |
| const char bpc47[], uint32_t character) const |
| { return NULL; } |
| virtual SkTypeface* onMatchFaceStyle(const SkTypeface*, |
| const SkFontStyle&) const = 0; |
| |
| virtual SkTypeface* onCreateFromData(SkData*, int ttcIndex) const = 0; |
| virtual SkTypeface* onCreateFromStream(SkStream*, int ttcIndex) const = 0; |
| virtual SkTypeface* onCreateFromFile(const char path[], int ttcIndex) const = 0; |
| |
| virtual SkTypeface* onLegacyCreateTypeface(const char familyName[], |
| unsigned styleBits) const = 0; |
| private: |
| static SkFontMgr* Factory(); // implemented by porting layer |
| friend SkFontMgr* sk_fontmgr_create_default(); |
| |
| typedef SkRefCnt INHERITED; |
| }; |
| |
| #endif |