michael@0: /*
michael@0:  * Copyright 2013 Google Inc.
michael@0:  *
michael@0:  * Use of this source code is governed by a BSD-style license that can be
michael@0:  * found in the LICENSE file.
michael@0:  */
michael@0: 
michael@0: #ifndef SkFontMgr_DEFINED
michael@0: #define SkFontMgr_DEFINED
michael@0: 
michael@0: #include "SkRefCnt.h"
michael@0: #include "SkFontStyle.h"
michael@0: 
michael@0: class SkData;
michael@0: class SkStream;
michael@0: class SkString;
michael@0: class SkTypeface;
michael@0: 
michael@0: class SK_API SkFontStyleSet : public SkRefCnt {
michael@0: public:
michael@0:     SK_DECLARE_INST_COUNT(SkFontStyleSet)
michael@0: 
michael@0:     virtual int count() = 0;
michael@0:     virtual void getStyle(int index, SkFontStyle*, SkString* style) = 0;
michael@0:     virtual SkTypeface* createTypeface(int index) = 0;
michael@0:     virtual SkTypeface* matchStyle(const SkFontStyle& pattern) = 0;
michael@0: 
michael@0:     static SkFontStyleSet* CreateEmpty();
michael@0: 
michael@0: private:
michael@0:     typedef SkRefCnt INHERITED;
michael@0: };
michael@0: 
michael@0: class SkTypeface;
michael@0: 
michael@0: class SK_API SkFontMgr : public SkRefCnt {
michael@0: public:
michael@0:     SK_DECLARE_INST_COUNT(SkFontMgr)
michael@0: 
michael@0:     int countFamilies() const;
michael@0:     void getFamilyName(int index, SkString* familyName) const;
michael@0:     SkFontStyleSet* createStyleSet(int index) const;
michael@0: 
michael@0:     /**
michael@0:      *  The caller must call unref() on the returned object.
michael@0:      *  Never returns NULL; will return an empty set if the name is not found.
michael@0:      */
michael@0:     SkFontStyleSet* matchFamily(const char familyName[]) const;
michael@0: 
michael@0:     /**
michael@0:      *  Find the closest matching typeface to the specified familyName and style
michael@0:      *  and return a ref to it. The caller must call unref() on the returned
michael@0:      *  object. Will never return NULL, as it will return the default font if
michael@0:      *  no matching font is found.
michael@0:      */
michael@0:     SkTypeface* matchFamilyStyle(const char familyName[], const SkFontStyle&) const;
michael@0: 
michael@0:     SkTypeface* matchFaceStyle(const SkTypeface*, const SkFontStyle&) const;
michael@0: 
michael@0:     /**
michael@0:      *  Create a typeface for the specified data and TTC index (pass 0 for none)
michael@0:      *  or NULL if the data is not recognized. The caller must call unref() on
michael@0:      *  the returned object if it is not null.
michael@0:      */
michael@0:     SkTypeface* createFromData(SkData*, int ttcIndex = 0) const;
michael@0: 
michael@0:     /**
michael@0:      *  Create a typeface for the specified stream and TTC index
michael@0:      *  (pass 0 for none) or NULL if the stream is not recognized. The caller
michael@0:      *  must call unref() on the returned object if it is not null.
michael@0:      */
michael@0:     SkTypeface* createFromStream(SkStream*, int ttcIndex = 0) const;
michael@0: 
michael@0:     /**
michael@0:      *  Create a typeface for the specified fileName and TTC index
michael@0:      *  (pass 0 for none) or NULL if the file is not found, or its contents are
michael@0:      *  not recognized. The caller must call unref() on the returned object
michael@0:      *  if it is not null.
michael@0:      */
michael@0:     SkTypeface* createFromFile(const char path[], int ttcIndex = 0) const;
michael@0: 
michael@0:     SkTypeface* legacyCreateTypeface(const char familyName[],
michael@0:                                      unsigned typefaceStyleBits) const;
michael@0: 
michael@0:     /**
michael@0:      *  Return a ref to the default fontmgr. The caller must call unref() on
michael@0:      *  the returned object.
michael@0:      */
michael@0:     static SkFontMgr* RefDefault();
michael@0: 
michael@0: protected:
michael@0:     virtual int onCountFamilies() const = 0;
michael@0:     virtual void onGetFamilyName(int index, SkString* familyName) const = 0;
michael@0:     virtual SkFontStyleSet* onCreateStyleSet(int index)const  = 0;
michael@0: 
michael@0:     /** May return NULL if the name is not found. */
michael@0:     virtual SkFontStyleSet* onMatchFamily(const char familyName[]) const = 0;
michael@0: 
michael@0:     virtual SkTypeface* onMatchFamilyStyle(const char familyName[],
michael@0:                                            const SkFontStyle&) const = 0;
michael@0:     virtual SkTypeface* onMatchFaceStyle(const SkTypeface*,
michael@0:                                          const SkFontStyle&) const = 0;
michael@0: 
michael@0:     virtual SkTypeface* onCreateFromData(SkData*, int ttcIndex) const = 0;
michael@0:     virtual SkTypeface* onCreateFromStream(SkStream*, int ttcIndex) const = 0;
michael@0:     virtual SkTypeface* onCreateFromFile(const char path[], int ttcIndex) const = 0;
michael@0: 
michael@0:     virtual SkTypeface* onLegacyCreateTypeface(const char familyName[],
michael@0:                                                unsigned styleBits) const = 0;
michael@0: private:
michael@0:     static SkFontMgr* Factory();    // implemented by porting layer
michael@0:     friend void set_up_default(SkFontMgr** singleton);
michael@0: 
michael@0:     typedef SkRefCnt INHERITED;
michael@0: };
michael@0: 
michael@0: #endif