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
12 #include "SkFontStyle.h"
19 class SK_API SkFontStyleSet : public SkRefCnt {
21 SK_DECLARE_INST_COUNT(SkFontStyleSet)
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;
28 static SkFontStyleSet* CreateEmpty();
31 typedef SkRefCnt INHERITED;
36 class SK_API SkFontMgr : public SkRefCnt {
38 SK_DECLARE_INST_COUNT(SkFontMgr)
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 * It is possible that this will return a style set not accessible from
49 * createStyleSet(int) due to hidden or auto-activated fonts.
51 SkFontStyleSet* matchFamily(const char familyName[]) const;
54 * Find the closest matching typeface to the specified familyName and style
55 * and return a ref to it. The caller must call unref() on the returned
56 * object. Will never return NULL, as it will return the default font if
57 * no matching font is found.
59 * It is possible that this will return a style set not accessible from
60 * createStyleSet(int) or matchFamily(const char[]) due to hidden or
61 * auto-activated fonts.
63 SkTypeface* matchFamilyStyle(const char familyName[], const SkFontStyle&) const;
66 * Use the system fallback to find a typeface for the given character.
67 * Note that bcp47 is a combination of ISO 639, 15924, and 3166-1 codes,
68 * so it is fine to just pass a ISO 639 here.
70 * Will return NULL if no family can be found for the character
71 * in the system fallback.
73 * bcp47[0] is the least significant fallback, bcp47[bcp47Count-1] is the
74 * most significant. If no specified bcp47 codes match, any font with the
75 * requested character will be matched.
77 #ifdef SK_FM_NEW_MATCH_FAMILY_STYLE_CHARACTER
78 SkTypeface* matchFamilyStyleCharacter(const char familyName[], const SkFontStyle&,
79 const char* bcp47[], int bcp47Count,
80 SkUnichar character) const;
82 SkTypeface* matchFamilyStyleCharacter(const char familyName[], const SkFontStyle&,
83 const char bcp47[], SkUnichar character) const;
86 SkTypeface* matchFaceStyle(const SkTypeface*, const SkFontStyle&) const;
89 * Create a typeface for the specified data and TTC index (pass 0 for none)
90 * or NULL if the data is not recognized. The caller must call unref() on
91 * the returned object if it is not null.
93 SkTypeface* createFromData(SkData*, int ttcIndex = 0) const;
96 * Create a typeface for the specified stream and TTC index
97 * (pass 0 for none) or NULL if the stream is not recognized. The caller
98 * must call unref() on the returned object if it is not null.
100 SkTypeface* createFromStream(SkStream*, int ttcIndex = 0) const;
103 * Create a typeface for the specified fileName and TTC index
104 * (pass 0 for none) or NULL if the file is not found, or its contents are
105 * not recognized. The caller must call unref() on the returned object
108 SkTypeface* createFromFile(const char path[], int ttcIndex = 0) const;
110 SkTypeface* legacyCreateTypeface(const char familyName[],
111 unsigned typefaceStyleBits) const;
114 * Return a ref to the default fontmgr. The caller must call unref() on
115 * the returned object.
117 static SkFontMgr* RefDefault();
120 virtual int onCountFamilies() const = 0;
121 virtual void onGetFamilyName(int index, SkString* familyName) const = 0;
122 virtual SkFontStyleSet* onCreateStyleSet(int index)const = 0;
124 /** May return NULL if the name is not found. */
125 virtual SkFontStyleSet* onMatchFamily(const char familyName[]) const = 0;
127 virtual SkTypeface* onMatchFamilyStyle(const char familyName[],
128 const SkFontStyle&) const = 0;
129 // TODO: pure virtual, implement on all impls.
130 #ifdef SK_FM_NEW_MATCH_FAMILY_STYLE_CHARACTER
131 virtual SkTypeface* onMatchFamilyStyleCharacter(const char familyName[], const SkFontStyle&,
132 const char* bcp47[], int bcp47Count,
133 SkUnichar character) const
135 virtual SkTypeface* onMatchFamilyStyleCharacter(const char familyName[], const SkFontStyle&,
136 const char bcp47[], SkUnichar character) const
139 virtual SkTypeface* onMatchFaceStyle(const SkTypeface*,
140 const SkFontStyle&) const = 0;
142 virtual SkTypeface* onCreateFromData(SkData*, int ttcIndex) const = 0;
143 virtual SkTypeface* onCreateFromStream(SkStream*, int ttcIndex) const = 0;
144 virtual SkTypeface* onCreateFromFile(const char path[], int ttcIndex) const = 0;
146 virtual SkTypeface* onLegacyCreateTypeface(const char familyName[],
147 unsigned styleBits) const = 0;
149 static SkFontMgr* Factory(); // implemented by porting layer
150 static SkFontMgr* CreateDefault();
152 typedef SkRefCnt INHERITED;