1 /* 2 * Copyright 2013 Google Inc. 3 * 4 * Use of this source code is governed by a BSD-style license that can be 5 * found in the LICENSE file. 6 */ 7 8 #ifndef SkFontMgr_DEFINED 9 #define SkFontMgr_DEFINED 10 11 #include "SkRefCnt.h" 12 #include "SkFontStyle.h" 13 14 class SkData; 15 class SkStream; 16 class SkString; 17 class SkTypeface; 18 19 class SK_API SkFontStyleSet : public SkRefCnt { 20 public: 21 SK_DECLARE_INST_COUNT(SkFontStyleSet) 22 23 virtual int count() = 0; 24 virtual void getStyle(int index, SkFontStyle*, SkString* style) = 0; 25 virtual SkTypeface* createTypeface(int index) = 0; 26 virtual SkTypeface* matchStyle(const SkFontStyle& pattern) = 0; 27 28 static SkFontStyleSet* CreateEmpty(); 29 30 private: 31 typedef SkRefCnt INHERITED; 32 }; 33 34 class SkTypeface; 35 36 class SK_API SkFontMgr : public SkRefCnt { 37 public: 38 SK_DECLARE_INST_COUNT(SkFontMgr) 39 40 int countFamilies(); 41 void getFamilyName(int index, SkString* familyName); 42 SkFontStyleSet* createStyleSet(int index); 43 44 /** 45 * The caller must call unref() on the returned object. 46 * Never returns NULL; will return an empty set if the name is not found. 47 */ 48 SkFontStyleSet* matchFamily(const char familyName[]); 49 50 /** 51 * Find the closest matching typeface to the specified familyName and style 52 * and return a ref to it. The caller must call unref() on the returned 53 * object. Will never return NULL, as it will return the default font if 54 * no matching font is found. 55 */ 56 SkTypeface* matchFamilyStyle(const char familyName[], const SkFontStyle&); 57 58 SkTypeface* matchFaceStyle(const SkTypeface*, const SkFontStyle&); 59 60 /** 61 * Create a typeface for the specified data and TTC index (pass 0 for none) 62 * or NULL if the data is not recognized. The caller must call unref() on 63 * the returned object if it is not null. 64 */ 65 SkTypeface* createFromData(SkData*, int ttcIndex = 0); 66 67 /** 68 * Create a typeface for the specified stream and TTC index 69 * (pass 0 for none) or NULL if the stream is not recognized. The caller 70 * must call unref() on the returned object if it is not null. 71 */ 72 SkTypeface* createFromStream(SkStream*, int ttcIndex = 0); 73 74 /** 75 * Create a typeface for the specified fileName and TTC index 76 * (pass 0 for none) or NULL if the file is not found, or its contents are 77 * not recognized. The caller must call unref() on the returned object 78 * if it is not null. 79 */ 80 SkTypeface* createFromFile(const char path[], int ttcIndex = 0); 81 82 SkTypeface* legacyCreateTypeface(const char familyName[], 83 unsigned typefaceStyleBits); 84 85 /** 86 * Return a ref to the default fontmgr. The caller must call unref() on 87 * the returned object. 88 */ 89 static SkFontMgr* RefDefault(); 90 91 protected: 92 virtual int onCountFamilies() = 0; 93 virtual void onGetFamilyName(int index, SkString* familyName) = 0; 94 virtual SkFontStyleSet* onCreateStyleSet(int index) = 0; 95 96 /** May return NULL if the name is not found. */ 97 virtual SkFontStyleSet* onMatchFamily(const char familyName[]) = 0; 98 99 virtual SkTypeface* onMatchFamilyStyle(const char familyName[], 100 const SkFontStyle&) = 0; 101 virtual SkTypeface* onMatchFaceStyle(const SkTypeface*, 102 const SkFontStyle&) = 0; 103 104 virtual SkTypeface* onCreateFromData(SkData*, int ttcIndex) = 0; 105 virtual SkTypeface* onCreateFromStream(SkStream*, int ttcIndex) = 0; 106 virtual SkTypeface* onCreateFromFile(const char path[], int ttcIndex) = 0; 107 108 virtual SkTypeface* onLegacyCreateTypeface(const char familyName[], 109 unsigned styleBits) = 0; 110 private: 111 static SkFontMgr* Factory(); // implemented by porting layer 112 friend void set_up_default(SkFontMgr** singleton); 113 114 typedef SkRefCnt INHERITED; 115 }; 116 117 #endif 118