1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/gfx/skia/trunk/include/core/SkFlattenable.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,114 @@
1.4 +
1.5 +/*
1.6 + * Copyright 2006 The Android Open Source Project
1.7 + *
1.8 + * Use of this source code is governed by a BSD-style license that can be
1.9 + * found in the LICENSE file.
1.10 + */
1.11 +
1.12 +
1.13 +#ifndef SkFlattenable_DEFINED
1.14 +#define SkFlattenable_DEFINED
1.15 +
1.16 +#include "SkRefCnt.h"
1.17 +
1.18 +class SkReadBuffer;
1.19 +class SkWriteBuffer;
1.20 +
1.21 +#define SK_DEFINE_FLATTENABLE_REGISTRAR_ENTRY(flattenable) \
1.22 + SkFlattenable::Registrar(#flattenable, flattenable::CreateProc, \
1.23 + flattenable::GetFlattenableType());
1.24 +
1.25 +#define SK_DECLARE_FLATTENABLE_REGISTRAR_GROUP() static void InitializeFlattenables();
1.26 +
1.27 +#define SK_DEFINE_FLATTENABLE_REGISTRAR_GROUP_START(flattenable) \
1.28 + void flattenable::InitializeFlattenables() {
1.29 +
1.30 +#define SK_DEFINE_FLATTENABLE_REGISTRAR_GROUP_END \
1.31 + }
1.32 +
1.33 +#define SK_DECLARE_UNFLATTENABLE_OBJECT() \
1.34 + virtual Factory getFactory() const SK_OVERRIDE { return NULL; }
1.35 +
1.36 +#define SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(flattenable) \
1.37 + virtual Factory getFactory() const SK_OVERRIDE { return CreateProc; } \
1.38 + static SkFlattenable* CreateProc(SkReadBuffer& buffer) { \
1.39 + return SkNEW_ARGS(flattenable, (buffer)); \
1.40 + }
1.41 +
1.42 +/** For SkFlattenable derived objects with a valid type
1.43 + This macro should only be used in base class objects in core
1.44 + */
1.45 +#define SK_DEFINE_FLATTENABLE_TYPE(flattenable) \
1.46 + static Type GetFlattenableType() { \
1.47 + return k##flattenable##_Type; \
1.48 + }
1.49 +
1.50 +/** \class SkFlattenable
1.51 +
1.52 + SkFlattenable is the base class for objects that need to be flattened
1.53 + into a data stream for either transport or as part of the key to the
1.54 + font cache.
1.55 + */
1.56 +class SK_API SkFlattenable : public SkRefCnt {
1.57 +public:
1.58 + enum Type {
1.59 + kSkColorFilter_Type,
1.60 + kSkDrawLooper_Type,
1.61 + kSkImageFilter_Type,
1.62 + kSkMaskFilter_Type,
1.63 + kSkPathEffect_Type,
1.64 + kSkPixelRef_Type,
1.65 + kSkRasterizer_Type,
1.66 + kSkShader_Type,
1.67 + kSkUnitMapper_Type,
1.68 + kSkXfermode_Type,
1.69 + };
1.70 +
1.71 + SK_DECLARE_INST_COUNT(SkFlattenable)
1.72 +
1.73 + typedef SkFlattenable* (*Factory)(SkReadBuffer&);
1.74 +
1.75 + SkFlattenable() {}
1.76 +
1.77 + /** Implement this to return a factory function pointer that can be called
1.78 + to recreate your class given a buffer (previously written to by your
1.79 + override of flatten().
1.80 + */
1.81 + virtual Factory getFactory() const = 0;
1.82 +
1.83 + /** Returns the name of the object's class
1.84 + */
1.85 + const char* getTypeName() const { return FactoryToName(getFactory()); }
1.86 +
1.87 + static Factory NameToFactory(const char name[]);
1.88 + static const char* FactoryToName(Factory);
1.89 + static bool NameToType(const char name[], Type* type);
1.90 +
1.91 + static void Register(const char name[], Factory, Type);
1.92 +
1.93 + class Registrar {
1.94 + public:
1.95 + Registrar(const char name[], Factory factory, Type type) {
1.96 + SkFlattenable::Register(name, factory, type);
1.97 + }
1.98 + };
1.99 +
1.100 + /** Override this to write data specific to your subclass into the buffer,
1.101 + being sure to call your super-class' version first. This data will later
1.102 + be passed to your Factory function, returned by getFactory().
1.103 + */
1.104 + virtual void flatten(SkWriteBuffer&) const;
1.105 +
1.106 +protected:
1.107 + SkFlattenable(SkReadBuffer&) {}
1.108 +
1.109 +private:
1.110 + static void InitializeFlattenablesIfNeeded();
1.111 +
1.112 + friend class SkGraphics;
1.113 +
1.114 + typedef SkRefCnt INHERITED;
1.115 +};
1.116 +
1.117 +#endif
