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/*
* 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();
void getFamilyName(int index, SkString* familyName);
SkFontStyleSet* createStyleSet(int index);
SkFontStyleSet* matchFamily(const char familyName[]);
/**
* 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.
*/
SkTypeface* matchFamilyStyle(const char familyName[], const SkFontStyle&);
SkTypeface* matchFaceStyle(const SkTypeface*, const SkFontStyle&);
/**
* 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);
/**
* 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);
/**
* 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);
SkTypeface* legacyCreateTypeface(const char familyName[],
unsigned typefaceStyleBits);
/**
* Return a ref to the default fontmgr. The caller must call unref() on
* the returned object.
*/
static SkFontMgr* RefDefault();
protected:
virtual int onCountFamilies() = 0;
virtual void onGetFamilyName(int index, SkString* familyName) = 0;
virtual SkFontStyleSet* onCreateStyleSet(int index) = 0;
virtual SkFontStyleSet* onMatchFamily(const char familyName[]) = 0;
virtual SkTypeface* onMatchFamilyStyle(const char familyName[],
const SkFontStyle&) = 0;
virtual SkTypeface* onMatchFaceStyle(const SkTypeface*,
const SkFontStyle&) = 0;
virtual SkTypeface* onCreateFromData(SkData*, int ttcIndex) = 0;
virtual SkTypeface* onCreateFromStream(SkStream*, int ttcIndex) = 0;
virtual SkTypeface* onCreateFromFile(const char path[], int ttcIndex) = 0;
// TODO: make this pure-virtual once all ports know about it
virtual SkTypeface* onLegacyCreateTypeface(const char familyName[],
unsigned styleBits) = 0;
private:
static SkFontMgr* Factory(); // implemented by porting layer
friend void set_up_default(SkFontMgr** singleton);
typedef SkRefCnt INHERITED;
};
#endif
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