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