зеркало из https://github.com/mozilla/moz-skia.git
107 строки
3.2 KiB
C++
107 строки
3.2 KiB
C++
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/*
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* Copyright 2006 The Android Open Source Project
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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 SkFlattenable_DEFINED
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#define SkFlattenable_DEFINED
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#include "SkRefCnt.h"
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class SkFlattenableReadBuffer;
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class SkFlattenableWriteBuffer;
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#if SK_ALLOW_STATIC_GLOBAL_INITIALIZERS
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#define SK_DEFINE_FLATTENABLE_REGISTRAR(flattenable) \
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static SkFlattenable::Registrar g##flattenable##Reg(#flattenable, \
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flattenable::CreateProc);
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#define SK_DEFINE_FLATTENABLE_REGISTRAR_ENTRY(flattenable) \
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static SkFlattenable::Registrar g##flattenable##Reg(#flattenable, \
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flattenable::CreateProc);
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#define SK_DECLARE_FLATTENABLE_REGISTRAR_GROUP()
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#define SK_DEFINE_FLATTENABLE_REGISTRAR_GROUP_START(flattenable)
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#define SK_DEFINE_FLATTENABLE_REGISTRAR_GROUP_END
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#else
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#define SK_DEFINE_FLATTENABLE_REGISTRAR(flattenable)
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#define SK_DEFINE_FLATTENABLE_REGISTRAR_ENTRY(flattenable) \
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SkFlattenable::Registrar(#flattenable, flattenable::CreateProc);
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#define SK_DECLARE_FLATTENABLE_REGISTRAR_GROUP() static void InitializeFlattenables();
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#define SK_DEFINE_FLATTENABLE_REGISTRAR_GROUP_START(flattenable) \
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void flattenable::InitializeFlattenables() {
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#define SK_DEFINE_FLATTENABLE_REGISTRAR_GROUP_END \
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}
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#endif
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#define SK_DECLARE_UNFLATTENABLE_OBJECT() \
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virtual Factory getFactory() SK_OVERRIDE { return NULL; }; \
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#define SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(flattenable) \
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virtual Factory getFactory() SK_OVERRIDE { return CreateProc; } \
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static SkFlattenable* CreateProc(SkFlattenableReadBuffer& buffer) { \
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return SkNEW_ARGS(flattenable, (buffer)); \
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}
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/** \class SkFlattenable
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SkFlattenable is the base class for objects that need to be flattened
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into a data stream for either transport or as part of the key to the
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font cache.
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*/
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class SK_API SkFlattenable : public SkRefCnt {
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public:
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SK_DECLARE_INST_COUNT(SkFlattenable)
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typedef SkFlattenable* (*Factory)(SkFlattenableReadBuffer&);
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SkFlattenable() {}
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/** Implement this to return a factory function pointer that can be called
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to recreate your class given a buffer (previously written to by your
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override of flatten().
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*/
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virtual Factory getFactory() = 0;
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static Factory NameToFactory(const char name[]);
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static const char* FactoryToName(Factory);
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static void Register(const char name[], Factory);
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class Registrar {
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public:
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Registrar(const char name[], Factory factory) {
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SkFlattenable::Register(name, factory);
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}
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};
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protected:
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SkFlattenable(SkFlattenableReadBuffer&) {}
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/** Override this to write data specific to your subclass into the buffer,
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being sure to call your super-class' version first. This data will later
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be passed to your Factory function, returned by getFactory().
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*/
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virtual void flatten(SkFlattenableWriteBuffer&) const;
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private:
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#if !SK_ALLOW_STATIC_GLOBAL_INITIALIZERS
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static void InitializeFlattenables();
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#endif
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friend class SkGraphics;
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friend class SkFlattenableWriteBuffer;
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typedef SkRefCnt INHERITED;
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};
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#endif
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