You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
166 lines
6.4 KiB
166 lines
6.4 KiB
/*
|
|
* 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 "include/core/SkFontArguments.h"
|
|
#include "include/core/SkFontStyle.h"
|
|
#include "include/core/SkRefCnt.h"
|
|
#include "include/core/SkTypes.h"
|
|
|
|
class SkData;
|
|
class SkFontData;
|
|
class SkStreamAsset;
|
|
class SkString;
|
|
class SkTypeface;
|
|
|
|
class SK_API SkFontStyleSet : public SkRefCnt {
|
|
public:
|
|
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();
|
|
|
|
protected:
|
|
SkTypeface* matchStyleCSS3(const SkFontStyle& pattern);
|
|
|
|
private:
|
|
using INHERITED = SkRefCnt;
|
|
};
|
|
|
|
class SK_API SkFontMgr : public SkRefCnt {
|
|
public:
|
|
int countFamilies() const;
|
|
void getFamilyName(int index, SkString* familyName) const;
|
|
SkFontStyleSet* createStyleSet(int index) const;
|
|
|
|
/**
|
|
* The caller must call unref() on the returned object.
|
|
* Never returns NULL; will return an empty set if the name is not found.
|
|
*
|
|
* Passing nullptr as the parameter will return the default system family.
|
|
* Note that most systems don't have a default system family, so passing nullptr will often
|
|
* result in the empty set.
|
|
*
|
|
* It is possible that this will return a style set not accessible from
|
|
* createStyleSet(int) due to hidden or auto-activated fonts.
|
|
*/
|
|
SkFontStyleSet* matchFamily(const char familyName[]) const;
|
|
|
|
/**
|
|
* 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 return nullptr if no 'good' match is found.
|
|
*
|
|
* Passing |nullptr| as the parameter for |familyName| will return the
|
|
* default system font.
|
|
*
|
|
* It is possible that this will return a style set not accessible from
|
|
* createStyleSet(int) or matchFamily(const char[]) due to hidden or
|
|
* auto-activated fonts.
|
|
*/
|
|
SkTypeface* matchFamilyStyle(const char familyName[], const SkFontStyle&) const;
|
|
|
|
/**
|
|
* Use the system fallback to find a typeface for the given character.
|
|
* Note that bcp47 is a combination of ISO 639, 15924, and 3166-1 codes,
|
|
* so it is fine to just pass a ISO 639 here.
|
|
*
|
|
* Will return NULL if no family can be found for the character
|
|
* in the system fallback.
|
|
*
|
|
* Passing |nullptr| as the parameter for |familyName| will return the
|
|
* default system font.
|
|
*
|
|
* bcp47[0] is the least significant fallback, bcp47[bcp47Count-1] is the
|
|
* most significant. If no specified bcp47 codes match, any font with the
|
|
* requested character will be matched.
|
|
*/
|
|
SkTypeface* matchFamilyStyleCharacter(const char familyName[], const SkFontStyle&,
|
|
const char* bcp47[], int bcp47Count,
|
|
SkUnichar character) const;
|
|
|
|
/**
|
|
* 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.
|
|
*/
|
|
sk_sp<SkTypeface> makeFromData(sk_sp<SkData>, int ttcIndex = 0) const;
|
|
|
|
/**
|
|
* 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.
|
|
*/
|
|
sk_sp<SkTypeface> makeFromStream(std::unique_ptr<SkStreamAsset>, int ttcIndex = 0) const;
|
|
|
|
/* Experimental, API subject to change. */
|
|
sk_sp<SkTypeface> makeFromStream(std::unique_ptr<SkStreamAsset>, const SkFontArguments&) const;
|
|
|
|
/**
|
|
* Create a typeface from the specified font data.
|
|
* Will return NULL if the typeface could not be created.
|
|
* The caller must call unref() on the returned object if it is not null.
|
|
*/
|
|
sk_sp<SkTypeface> makeFromFontData(std::unique_ptr<SkFontData>) const;
|
|
|
|
/**
|
|
* 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.
|
|
*/
|
|
sk_sp<SkTypeface> makeFromFile(const char path[], int ttcIndex = 0) const;
|
|
|
|
sk_sp<SkTypeface> legacyMakeTypeface(const char familyName[], SkFontStyle style) const;
|
|
|
|
/** Return the default fontmgr. */
|
|
static sk_sp<SkFontMgr> RefDefault();
|
|
|
|
protected:
|
|
virtual int onCountFamilies() const = 0;
|
|
virtual void onGetFamilyName(int index, SkString* familyName) const = 0;
|
|
virtual SkFontStyleSet* onCreateStyleSet(int index)const = 0;
|
|
|
|
/** May return NULL if the name is not found. */
|
|
virtual SkFontStyleSet* onMatchFamily(const char familyName[]) const = 0;
|
|
|
|
virtual SkTypeface* onMatchFamilyStyle(const char familyName[],
|
|
const SkFontStyle&) const = 0;
|
|
virtual SkTypeface* onMatchFamilyStyleCharacter(const char familyName[], const SkFontStyle&,
|
|
const char* bcp47[], int bcp47Count,
|
|
SkUnichar character) const = 0;
|
|
|
|
virtual sk_sp<SkTypeface> onMakeFromData(sk_sp<SkData>, int ttcIndex) const = 0;
|
|
virtual sk_sp<SkTypeface> onMakeFromStreamIndex(std::unique_ptr<SkStreamAsset>,
|
|
int ttcIndex) const = 0;
|
|
virtual sk_sp<SkTypeface> onMakeFromStreamArgs(std::unique_ptr<SkStreamAsset>,
|
|
const SkFontArguments&) const = 0;
|
|
virtual sk_sp<SkTypeface> onMakeFromFontData(std::unique_ptr<SkFontData>) const;
|
|
virtual sk_sp<SkTypeface> onMakeFromFile(const char path[], int ttcIndex) const = 0;
|
|
|
|
virtual sk_sp<SkTypeface> onLegacyMakeTypeface(const char familyName[], SkFontStyle) const = 0;
|
|
|
|
// this method is never called -- will be removed
|
|
virtual SkTypeface* onMatchFaceStyle(const SkTypeface*,
|
|
const SkFontStyle&) const {
|
|
return nullptr;
|
|
}
|
|
|
|
private:
|
|
|
|
/** Implemented by porting layer to return the default factory. */
|
|
static sk_sp<SkFontMgr> Factory();
|
|
|
|
using INHERITED = SkRefCnt;
|
|
};
|
|
|
|
#endif
|