2 * Copyright 2013 Google Inc.
4 * Use of this source code is governed by a BSD-style license that can be
5 * found in the LICENSE file.
8 #ifndef SkFontMgr_DEFINED
9 #define SkFontMgr_DEFINED
11 #include "include/core/SkFontArguments.h"
12 #include "include/core/SkFontStyle.h"
13 #include "include/core/SkRefCnt.h"
14 #include "include/core/SkTypes.h"
22 class SK_API SkFontStyleSet : public SkRefCnt {
24 virtual int count() = 0;
25 virtual void getStyle(int index, SkFontStyle*, SkString* style) = 0;
26 virtual SkTypeface* createTypeface(int index) = 0;
27 virtual SkTypeface* matchStyle(const SkFontStyle& pattern) = 0;
29 static SkFontStyleSet* CreateEmpty();
32 SkTypeface* matchStyleCSS3(const SkFontStyle& pattern);
35 using INHERITED = SkRefCnt;
38 class SK_API SkFontMgr : public SkRefCnt {
40 int countFamilies() const;
41 void getFamilyName(int index, SkString* familyName) const;
42 SkFontStyleSet* createStyleSet(int index) const;
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.
48 * Passing nullptr as the parameter will return the default system family.
49 * Note that most systems don't have a default system family, so passing nullptr will often
50 * result in the empty set.
52 * It is possible that this will return a style set not accessible from
53 * createStyleSet(int) due to hidden or auto-activated fonts.
55 SkFontStyleSet* matchFamily(const char familyName[]) const;
58 * Find the closest matching typeface to the specified familyName and style
59 * and return a ref to it. The caller must call unref() on the returned
60 * object. Will return nullptr if no 'good' match is found.
62 * Passing |nullptr| as the parameter for |familyName| will return the
63 * default system font.
65 * It is possible that this will return a style set not accessible from
66 * createStyleSet(int) or matchFamily(const char[]) due to hidden or
67 * auto-activated fonts.
69 SkTypeface* matchFamilyStyle(const char familyName[], const SkFontStyle&) const;
72 * Use the system fallback to find a typeface for the given character.
73 * Note that bcp47 is a combination of ISO 639, 15924, and 3166-1 codes,
74 * so it is fine to just pass a ISO 639 here.
76 * Will return NULL if no family can be found for the character
77 * in the system fallback.
79 * Passing |nullptr| as the parameter for |familyName| will return the
80 * default system font.
82 * bcp47[0] is the least significant fallback, bcp47[bcp47Count-1] is the
83 * most significant. If no specified bcp47 codes match, any font with the
84 * requested character will be matched.
86 SkTypeface* matchFamilyStyleCharacter(const char familyName[], const SkFontStyle&,
87 const char* bcp47[], int bcp47Count,
88 SkUnichar character) const;
91 * Create a typeface for the specified data and TTC index (pass 0 for none)
92 * or NULL if the data is not recognized. The caller must call unref() on
93 * the returned object if it is not null.
95 sk_sp<SkTypeface> makeFromData(sk_sp<SkData>, int ttcIndex = 0) const;
98 * Create a typeface for the specified stream and TTC index
99 * (pass 0 for none) or NULL if the stream is not recognized. The caller
100 * must call unref() on the returned object if it is not null.
102 sk_sp<SkTypeface> makeFromStream(std::unique_ptr<SkStreamAsset>, int ttcIndex = 0) const;
104 /* Experimental, API subject to change. */
105 sk_sp<SkTypeface> makeFromStream(std::unique_ptr<SkStreamAsset>, const SkFontArguments&) const;
108 * Create a typeface for the specified fileName and TTC index
109 * (pass 0 for none) or NULL if the file is not found, or its contents are
110 * not recognized. The caller must call unref() on the returned object
113 sk_sp<SkTypeface> makeFromFile(const char path[], int ttcIndex = 0) const;
115 sk_sp<SkTypeface> legacyMakeTypeface(const char familyName[], SkFontStyle style) const;
117 /** Return the default fontmgr. */
118 static sk_sp<SkFontMgr> RefDefault();
121 virtual int onCountFamilies() const = 0;
122 virtual void onGetFamilyName(int index, SkString* familyName) const = 0;
123 virtual SkFontStyleSet* onCreateStyleSet(int index)const = 0;
125 /** May return NULL if the name is not found. */
126 virtual SkFontStyleSet* onMatchFamily(const char familyName[]) const = 0;
128 virtual SkTypeface* onMatchFamilyStyle(const char familyName[],
129 const SkFontStyle&) const = 0;
130 virtual SkTypeface* onMatchFamilyStyleCharacter(const char familyName[], const SkFontStyle&,
131 const char* bcp47[], int bcp47Count,
132 SkUnichar character) const = 0;
134 virtual sk_sp<SkTypeface> onMakeFromData(sk_sp<SkData>, int ttcIndex) const = 0;
135 virtual sk_sp<SkTypeface> onMakeFromStreamIndex(std::unique_ptr<SkStreamAsset>,
136 int ttcIndex) const = 0;
137 virtual sk_sp<SkTypeface> onMakeFromStreamArgs(std::unique_ptr<SkStreamAsset>,
138 const SkFontArguments&) const = 0;
139 virtual sk_sp<SkTypeface> onMakeFromFile(const char path[], int ttcIndex) const = 0;
141 virtual sk_sp<SkTypeface> onLegacyMakeTypeface(const char familyName[], SkFontStyle) const = 0;
143 // this method is never called -- will be removed
144 virtual SkTypeface* onMatchFaceStyle(const SkTypeface*,
145 const SkFontStyle&) const {
151 /** Implemented by porting layer to return the default factory. */
152 static sk_sp<SkFontMgr> Factory();
154 using INHERITED = SkRefCnt;