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/*
* Copyright 2006 The Android Open Source Project
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#ifndef SkFlattenable_DEFINED
#define SkFlattenable_DEFINED
#include "include/core/SkRefCnt.h"
class SkData;
class SkReadBuffer;
class SkWriteBuffer;
struct SkSerialProcs;
struct SkDeserialProcs;
/** \class SkFlattenable
SkFlattenable is the base class for objects that need to be flattened
into a data stream for either transport or as part of the key to the
font cache.
*/
class SK_API SkFlattenable : public SkRefCnt {
public:
enum Type {
kSkColorFilter_Type,
kSkBlender_Type,
kSkDrawable_Type,
kSkDrawLooper_Type, // no longer used internally by Skia
kSkImageFilter_Type,
kSkMaskFilter_Type,
kSkPathEffect_Type,
kSkShader_Type,
};
typedef sk_sp<SkFlattenable> (*Factory)(SkReadBuffer&);
SkFlattenable() {}
/** Implement this to return a factory function pointer that can be called
to recreate your class given a buffer (previously written to by your
override of flatten().
*/
virtual Factory getFactory() const = 0;
/**
* Returns the name of the object's class.
*/
virtual const char* getTypeName() const = 0;
static Factory NameToFactory(const char name[]);
static const char* FactoryToName(Factory);
static void Register(const char name[], Factory);
/**
* Override this if your subclass needs to record data that it will need to recreate itself
* from its CreateProc (returned by getFactory()).
*
* DEPRECATED public : will move to protected ... use serialize() instead
*/
virtual void flatten(SkWriteBuffer&) const {}
virtual Type getFlattenableType() const = 0;
//
// public ways to serialize / deserialize
//
sk_sp<SkData> serialize(const SkSerialProcs* = nullptr) const;
size_t serialize(void* memory, size_t memory_size,
const SkSerialProcs* = nullptr) const;
static sk_sp<SkFlattenable> Deserialize(Type, const void* data, size_t length,
const SkDeserialProcs* procs = nullptr);
protected:
class PrivateInitializer {
public:
static void InitEffects();
static void InitImageFilters();
};
private:
static void RegisterFlattenablesIfNeeded();
static void Finalize();
friend class SkGraphics;
using INHERITED = SkRefCnt;
};
#if defined(SK_DISABLE_EFFECT_DESERIALIZATION)
#define SK_REGISTER_FLATTENABLE(type) do{}while(false)
#define SK_FLATTENABLE_HOOKS(type) \
static sk_sp<SkFlattenable> CreateProc(SkReadBuffer&); \
friend class SkFlattenable::PrivateInitializer; \
Factory getFactory() const override { return nullptr; } \
const char* getTypeName() const override { return #type; }
#else
#define SK_REGISTER_FLATTENABLE(type) \
SkFlattenable::Register(#type, type::CreateProc)
#define SK_FLATTENABLE_HOOKS(type) \
static sk_sp<SkFlattenable> CreateProc(SkReadBuffer&); \
friend class SkFlattenable::PrivateInitializer; \
Factory getFactory() const override { return type::CreateProc; } \
const char* getTypeName() const override { return #type; }
#endif
#endif
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