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1 | 1 |
2 /* | 2 /* |
3 * Copyright 2006 The Android Open Source Project | 3 * Copyright 2006 The Android Open Source Project |
4 * | 4 * |
5 * Use of this source code is governed by a BSD-style license that can be | 5 * Use of this source code is governed by a BSD-style license that can be |
6 * found in the LICENSE file. | 6 * found in the LICENSE file. |
7 */ | 7 */ |
8 | 8 |
9 | 9 |
10 #ifndef SkFlattenable_DEFINED | 10 #ifndef SkFlattenable_DEFINED |
11 #define SkFlattenable_DEFINED | 11 #define SkFlattenable_DEFINED |
12 | 12 |
13 #include "SkRefCnt.h" | 13 #include "SkRefCnt.h" |
14 | 14 |
15 class SkFlattenableReadBuffer; | 15 class SkFlattenableReadBuffer; |
16 class SkFlattenableWriteBuffer; | 16 class SkFlattenableWriteBuffer; |
17 | 17 |
18 #define SK_DEFINE_FLATTENABLE_REGISTRAR_ENTRY(flattenable) \ | 18 #define SK_DEFINE_FLATTENABLE_REGISTRAR_ENTRY(flattenable) \ |
19 SkFlattenable::Registrar(#flattenable, flattenable::CreateProc); | 19 SkFlattenable::Registrar(#flattenable, flattenable::CreateProc, flattena ble::IsA); |
20 | 20 |
21 #define SK_DECLARE_FLATTENABLE_REGISTRAR_GROUP() static void InitializeFlattenab les(); | 21 #define SK_DECLARE_FLATTENABLE_REGISTRAR_GROUP() static void InitializeFlattenab les(); |
22 | 22 |
23 #define SK_DEFINE_FLATTENABLE_REGISTRAR_GROUP_START(flattenable) \ | 23 #define SK_DEFINE_FLATTENABLE_REGISTRAR_GROUP_START(flattenable) \ |
24 void flattenable::InitializeFlattenables() { | 24 void flattenable::InitializeFlattenables() { |
25 | 25 |
26 #define SK_DEFINE_FLATTENABLE_REGISTRAR_GROUP_END \ | 26 #define SK_DEFINE_FLATTENABLE_REGISTRAR_GROUP_END \ |
27 } | 27 } |
28 | 28 |
29 #define SK_DECLARE_UNFLATTENABLE_OBJECT() \ | 29 #define SK_DECLARE_UNFLATTENABLE_OBJECT() \ |
30 virtual Factory getFactory() SK_OVERRIDE { return NULL; } | 30 virtual Factory getFactory() SK_OVERRIDE { return NULL; } |
31 | 31 |
32 #define SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(flattenable) \ | 32 /** For SkFlattenable derived objects that can be serialized without type checki ng |
33 */ | |
34 #define SK_DEFINE_FLATTENABLE_SERIALIZABLE(flattenable) \ | |
mtklein
2013/10/07 19:29:56
Maybe SK_DEFINE_FLATTENABLE_DESERIALIZATION_PROCS?
sugoi1
2013/10/08 20:23:10
Done.
| |
33 virtual Factory getFactory() SK_OVERRIDE { return CreateProc; } \ | 35 virtual Factory getFactory() SK_OVERRIDE { return CreateProc; } \ |
34 static SkFlattenable* CreateProc(SkFlattenableReadBuffer& buffer) { \ | 36 static SkFlattenable* CreateProc(SkFlattenableReadBuffer& buffer) { \ |
35 return SkNEW_ARGS(flattenable, (buffer)); \ | 37 return SkNEW_ARGS(flattenable, (buffer)); \ |
36 } | 38 } |
37 | 39 |
40 /** For SkFlattenable derived objects that need type checking | |
41 */ | |
42 #define SK_DEFINE_FLATTENABLE_TYPE_CHECKING(flattenable) \ | |
43 static bool IsA(const char* name) { \ | |
44 return (strcmp(flattenable::GetName(), name) == 0) || INHERITED::IsA(nam e); \ | |
sugoi1
2013/10/07 15:54:08
These type checks are now done using string compar
| |
45 } \ | |
46 virtual const char* getFlattenableName() SK_OVERRIDE { \ | |
47 return flattenable::GetName(); \ | |
48 } | |
49 | |
50 /** For SkFlattenable derived objects with a valid type | |
51 This macros would typically be used by virtual classes, which need a type, b ut can't | |
52 be constructed or serialized directly without going through a derived class | |
53 */ | |
54 #define SK_DEFINE_FLATTENABLE_TYPE(flattenable) \ | |
mtklein
2013/10/07 19:29:56
Is there any case where we need to call SK_DEFINE_
sugoi1
2013/10/08 20:23:10
Yeah, I had already done this locally.
| |
55 static const char* GetName() { \ | |
56 return #flattenable; \ | |
57 } \ | |
58 SK_DEFINE_FLATTENABLE_TYPE_CHECKING(flattenable) | |
59 | |
60 /** For SkFlattenable derived objects defined within the skia library | |
61 */ | |
62 #define SK_DEFINE_FLATTENABLE_SERIALIZABLE_TYPE(flattenable) \ | |
mtklein
2013/10/07 19:29:56
I think I may have been unclear before. It looks
sugoi1
2013/10/08 20:23:10
Done.
| |
63 SK_DEFINE_FLATTENABLE_SERIALIZABLE(flattenable) \ | |
64 SK_DEFINE_FLATTENABLE_TYPE(flattenable) | |
65 | |
66 /** Deprecated, remove once noone is using it anymore | |
67 */ | |
68 #define SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(flattenable) \ | |
69 SK_DEFINE_FLATTENABLE_SERIALIZABLE_TYPE(flattenable) | |
70 | |
71 /** This is for an instantiatable SkFlattenable derived class | |
72 with derived classes available in header files | |
73 */ | |
74 #define SK_DECLARE_FLATTENABLE_GROUP_TYPE(flattenable) \ | |
75 SK_DEFINE_FLATTENABLE_TYPE(flattenable) \ | |
76 SK_DECLARE_FLATTENABLE_REGISTRAR_GROUP() | |
77 | |
38 /** \class SkFlattenable | 78 /** \class SkFlattenable |
39 | 79 |
40 SkFlattenable is the base class for objects that need to be flattened | 80 SkFlattenable is the base class for objects that need to be flattened |
41 into a data stream for either transport or as part of the key to the | 81 into a data stream for either transport or as part of the key to the |
42 font cache. | 82 font cache. |
43 */ | 83 */ |
44 class SK_API SkFlattenable : public SkRefCnt { | 84 class SK_API SkFlattenable : public SkRefCnt { |
45 public: | 85 public: |
86 | |
46 SK_DECLARE_INST_COUNT(SkFlattenable) | 87 SK_DECLARE_INST_COUNT(SkFlattenable) |
47 | 88 |
48 typedef SkFlattenable* (*Factory)(SkFlattenableReadBuffer&); | 89 typedef SkFlattenable* (*Factory)(SkFlattenableReadBuffer&); |
90 typedef bool (*TypeCheck)(const char*); | |
49 | 91 |
50 SkFlattenable() {} | 92 SkFlattenable() {} |
51 | 93 |
52 /** Implement this to return a factory function pointer that can be called | 94 /** Implement this to return a factory function pointer that can be called |
53 to recreate your class given a buffer (previously written to by your | 95 to recreate your class given a buffer (previously written to by your |
54 override of flatten(). | 96 override of flatten(). |
55 */ | 97 */ |
56 virtual Factory getFactory() = 0; | 98 virtual Factory getFactory() = 0; |
57 | 99 |
58 static Factory NameToFactory(const char name[]); | 100 static Factory NameToFactory(const char name[]); |
59 static const char* FactoryToName(Factory); | 101 static const char* FactoryToName(Factory); |
60 static void Register(const char name[], Factory); | 102 |
103 static void Register(const char name[], Factory, TypeCheck); | |
104 | |
105 /** Returns the class id | |
106 GetName() methods on classes descending from SkFlattenable should return | |
107 the name associated with that class, or SkFlattenable::kNoneType if | |
mtklein
2013/10/07 19:29:56
kNoneType? comment generally needs an update?
sugoi1
2013/10/08 20:23:10
Done.
| |
108 they're not part of the subset of SkFlattenables that can be used with | |
109 SkFlattenable::TypeToFactory(). Typycally, SK_DEFINE_FLATTENABLE_TYPE() will | |
110 define GetName(), getFlattenableType() and IsA() in the derived class. | |
111 * Note that SK_DEFINE_FLATTENABLE_TYPE() is included in other macros tha t include | |
112 the "_TYPE" suffix, so most classes will have these declared by defaul t. | |
mtklein
2013/10/07 19:29:56
I get that this seems convenient, but the implicit
sugoi1
2013/10/08 20:23:10
Done. I did leave it in SK_DEFINE_FLATTENABLE_DESE
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113 External classes can use SK_DEFINE_FLATTENABLE_EXTERN(), which will do the same, | |
114 but set the class type to SkFlattenable::kNone_Type. | |
115 */ | |
116 static const char* GetName() { return "SkFlattenable"; } | |
mtklein
2013/10/07 19:29:56
GetTypeName?
sugoi1
2013/10/08 20:23:10
Done.
| |
117 | |
118 /** Returns the class id of an object | |
mtklein
2013/10/07 19:29:56
class id of an object -> name of the object's clas
sugoi1
2013/10/08 20:23:10
Done.
| |
119 */ | |
120 virtual const char* getFlattenableName() = 0; | |
mtklein
2013/10/07 19:29:56
getTypeName()?
sugoi1
2013/10/08 20:23:10
Done.
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121 | |
122 /** Returns whether the current object is of the given type | |
mtklein
2013/10/07 19:29:56
There's no current object here? How about
/** Re
sugoi1
2013/10/08 20:23:10
Done.
| |
123 */ | |
124 static bool IsA(const char* name) { | |
125 return strcmp(GetName(), name) == 0; | |
126 } | |
127 | |
128 /** Checks if typeA is a typeB | |
129 * For example, if typeA is kSkImageFilter and typeB is kSkFlattenable, thi s would return true | |
mtklein
2013/10/07 19:29:56
"SkImageFilter" and "SkFlattenable"?
sugoi1
2013/10/08 20:23:10
Done.
| |
130 * Inversely, if typeA is kSkFlattenable and typeB is kSkImageFilter, this would return false | |
131 */ | |
132 static bool TypeIsA(const char* nameA, const char* nameB) { | |
133 TypeCheck typeCheck = NameToTypeCheck(nameA); | |
134 return typeCheck ? (*typeCheck)(nameB) : false; | |
135 } | |
61 | 136 |
62 class Registrar { | 137 class Registrar { |
63 public: | 138 public: |
64 Registrar(const char name[], Factory factory) { | 139 Registrar(const char name[], Factory factory, TypeCheck typeCheck) { |
65 SkFlattenable::Register(name, factory); | 140 SkFlattenable::Register(name, factory, typeCheck); |
66 } | 141 } |
67 }; | 142 }; |
68 | 143 |
69 protected: | 144 protected: |
70 SkFlattenable(SkFlattenableReadBuffer&) {} | 145 SkFlattenable(SkFlattenableReadBuffer&) {} |
71 /** Override this to write data specific to your subclass into the buffer, | 146 /** Override this to write data specific to your subclass into the buffer, |
72 being sure to call your super-class' version first. This data will later | 147 being sure to call your super-class' version first. This data will later |
73 be passed to your Factory function, returned by getFactory(). | 148 be passed to your Factory function, returned by getFactory(). |
74 */ | 149 */ |
75 virtual void flatten(SkFlattenableWriteBuffer&) const; | 150 virtual void flatten(SkFlattenableWriteBuffer&) const; |
76 | 151 |
77 private: | 152 private: |
78 static void InitializeFlattenables(); | 153 static void InitializeFlattenables(); |
154 static TypeCheck NameToTypeCheck(const char name[]); | |
79 | 155 |
80 friend class SkGraphics; | 156 friend class SkGraphics; |
81 friend class SkFlattenableWriteBuffer; | 157 friend class SkFlattenableWriteBuffer; |
82 | 158 |
83 typedef SkRefCnt INHERITED; | 159 typedef SkRefCnt INHERITED; |
84 }; | 160 }; |
85 | 161 |
86 #endif | 162 #endif |
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