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/*
* Copyright 2014 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#ifndef SkFontMgr_indirect_DEFINED
#define SkFontMgr_indirect_DEFINED
#include "../private/SkMutex.h"
#include "../private/SkOnce.h"
#include "../private/SkTArray.h"
#include "SkFontMgr.h"
#include "SkRefCnt.h"
#include "SkRemotableFontMgr.h"
#include "SkTypeface.h"
#include "SkTypes.h"
class SkData;
class SkFontStyle;
class SkStreamAsset;
class SkString;
class SK_API SkFontMgr_Indirect : public SkFontMgr {
public:
// TODO: The SkFontMgr is only used for createFromStream/File/Data.
// In the future these calls should be broken out into their own interface
// with a name like SkFontRenderer.
SkFontMgr_Indirect(sk_sp<SkFontMgr> impl, sk_sp<SkRemotableFontMgr> proxy)
: fImpl(std::move(impl)), fProxy(std::move(proxy))
{ }
protected:
int onCountFamilies() const override;
void onGetFamilyName(int index, SkString* familyName) const override;
SkFontStyleSet* onCreateStyleSet(int index) const override;
SkFontStyleSet* onMatchFamily(const char familyName[]) const override;
SkTypeface* onMatchFamilyStyle(const char familyName[],
const SkFontStyle& fontStyle) const override;
SkTypeface* onMatchFamilyStyleCharacter(const char familyName[],
const SkFontStyle&,
const char* bcp47[],
int bcp47Count,
SkUnichar character) const override;
SkTypeface* onMatchFaceStyle(const SkTypeface* familyMember,
const SkFontStyle& fontStyle) const override;
SkTypeface* onCreateFromStream(SkStreamAsset* stream, int ttcIndex) const override;
SkTypeface* onCreateFromFile(const char path[], int ttcIndex) const override;
SkTypeface* onCreateFromData(SkData* data, int ttcIndex) const override;
SkTypeface* onLegacyCreateTypeface(const char familyName[], SkFontStyle) const override;
private:
SkTypeface* createTypefaceFromFontId(const SkFontIdentity& fontId) const;
sk_sp<SkFontMgr> fImpl;
sk_sp<SkRemotableFontMgr> fProxy;
struct DataEntry {
uint32_t fDataId; // key1
uint32_t fTtcIndex; // key2
SkTypeface* fTypeface; // value: weak ref to typeface
DataEntry() { }
DataEntry(DataEntry&& that)
: fDataId(that.fDataId)
, fTtcIndex(that.fTtcIndex)
, fTypeface(that.fTypeface)
{
SkDEBUGCODE(that.fDataId = SkFontIdentity::kInvalidDataId;)
SkDEBUGCODE(that.fTtcIndex = 0xbbadbeef;)
that.fTypeface = nullptr;
}
~DataEntry() {
if (fTypeface) {
fTypeface->weak_unref();
}
}
};
/**
* This cache is essentially { dataId: { ttcIndex: typeface } }
* For data caching we want a mapping from data id to weak references to
* typefaces with that data id. By storing the index next to the typeface,
* this data cache also acts as a typeface cache.
*/
mutable SkTArray<DataEntry> fDataCache;
mutable SkMutex fDataCacheMutex;
friend class SkStyleSet_Indirect;
};
#endif
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