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1 /* | |
2 * Copyright 2013 Google Inc. | |
3 * | |
4 * Use of this source code is governed by a BSD-style license that can be | |
5 * found in the LICENSE file. | |
6 */ | |
7 | |
8 #ifndef SkSecureReadBuffer_DEFINED | |
reed1
2013/09/04 18:49:36
nit: is SkValidatingReadBuffer.h a better name?
sugoi1
2013/09/04 20:14:52
Done.
| |
9 #define SkSecureReadBuffer_DEFINED | |
10 | |
11 #include "SkRefCnt.h" | |
12 #include "SkBitmapHeap.h" | |
13 #include "SkFlattenableBuffers.h" | |
14 #include "SkPath.h" | |
15 #include "SkPicture.h" | |
16 #include "SkReader32.h" | |
17 | |
18 class SkBitmap; | |
19 | |
20 #if defined(SK_DEBUG) && defined(SK_BUILD_FOR_MAC) | |
21 #define DEBUG_NON_DETERMINISTIC_ASSERT | |
22 #endif | |
23 | |
24 class SkSecureReadBuffer : public SkFlattenableReadBuffer { | |
25 public: | |
26 SkSecureReadBuffer(); | |
27 SkSecureReadBuffer(const void* data, size_t size); | |
28 SkSecureReadBuffer(SkStream* stream); | |
29 virtual ~SkSecureReadBuffer(); | |
30 | |
31 SkReader32* getReader32() { return &fReader; } | |
32 | |
33 uint32_t size() { return fReader.size(); } | |
34 uint32_t offset() { return fReader.offset(); } | |
35 bool eof() { return fReader.eof(); } | |
36 const void* skip(size_t size); | |
37 | |
38 // primitives | |
39 virtual bool readBool() SK_OVERRIDE; | |
40 virtual SkColor readColor() SK_OVERRIDE; | |
41 virtual SkFixed readFixed() SK_OVERRIDE; | |
42 virtual int32_t readInt() SK_OVERRIDE; | |
43 virtual SkScalar readScalar() SK_OVERRIDE; | |
44 virtual uint32_t readUInt() SK_OVERRIDE; | |
45 virtual int32_t read32() SK_OVERRIDE; | |
46 | |
47 // strings -- the caller is responsible for freeing the string contents | |
48 virtual void readString(SkString* string) SK_OVERRIDE; | |
49 virtual void* readEncodedString(size_t* length, SkPaint::TextEncoding encodi ng) SK_OVERRIDE; | |
50 | |
51 // common data structures | |
52 virtual SkFlattenable* readFlattenable() SK_OVERRIDE; | |
53 virtual void readPoint(SkPoint* point) SK_OVERRIDE; | |
54 virtual void readMatrix(SkMatrix* matrix) SK_OVERRIDE; | |
55 virtual void readIRect(SkIRect* rect) SK_OVERRIDE; | |
56 virtual void readRect(SkRect* rect) SK_OVERRIDE; | |
57 virtual void readRegion(SkRegion* region) SK_OVERRIDE; | |
58 virtual void readPath(SkPath* path) SK_OVERRIDE; | |
59 | |
60 // binary data and arrays | |
61 virtual uint32_t readByteArray(void* value) SK_OVERRIDE; | |
62 virtual uint32_t readColorArray(SkColor* colors) SK_OVERRIDE; | |
63 virtual uint32_t readIntArray(int32_t* values) SK_OVERRIDE; | |
64 virtual uint32_t readPointArray(SkPoint* points) SK_OVERRIDE; | |
65 virtual uint32_t readScalarArray(SkScalar* values) SK_OVERRIDE; | |
66 | |
67 // helpers to get info about arrays and binary data | |
68 virtual uint32_t getArrayCount() SK_OVERRIDE; | |
69 | |
70 virtual void readBitmap(SkBitmap* bitmap) SK_OVERRIDE; | |
71 virtual SkTypeface* readTypeface() SK_OVERRIDE; | |
72 | |
73 void setBitmapStorage(SkBitmapHeapReader* bitmapStorage) { | |
74 SkRefCnt_SafeAssign(fBitmapStorage, bitmapStorage); | |
75 } | |
76 | |
77 void setTypefaceArray(SkTypeface* array[], int count) { | |
78 fTFArray = array; | |
79 fTFCount = count; | |
80 } | |
81 | |
82 /** | |
83 * Call this with a pre-loaded array of Factories, in the same order as | |
84 * were created/written by the writer. SkPicture uses this. | |
85 */ | |
86 void setFactoryPlayback(SkFlattenable::Factory array[], int count) { | |
87 fFactoryTDArray = NULL; | |
88 fFactoryArray = array; | |
89 fFactoryCount = count; | |
90 } | |
91 | |
92 /** | |
93 * Call this with an initially empty array, so the reader can cache each | |
94 * factory it sees by name. Used by the pipe code in conjunction with | |
95 * SkOrderedWriteBuffer::setNamedFactoryRecorder. | |
96 */ | |
97 void setFactoryArray(SkTDArray<SkFlattenable::Factory>* array) { | |
98 fFactoryTDArray = array; | |
99 fFactoryArray = NULL; | |
100 fFactoryCount = 0; | |
101 } | |
102 | |
103 /** | |
104 * Provide a function to decode an SkBitmap from encoded data. Only used if the writer | |
105 * encoded the SkBitmap. If the proper decoder cannot be used, a red bitmap with the | |
106 * appropriate size will be used. | |
107 */ | |
108 void setBitmapDecoder(SkPicture::InstallPixelRefProc bitmapDecoder) { | |
109 fBitmapDecoder = bitmapDecoder; | |
110 } | |
111 | |
112 private: | |
113 void setMemory(const void* data, size_t size); | |
114 | |
115 static bool ptr_align_4(const void* ptr) { | |
116 return (((const char*)ptr - (const char*)NULL) & 3) == 0; | |
117 } | |
118 | |
119 SkReader32 fReader; | |
120 void* fMemoryPtr; | |
121 | |
122 SkBitmapHeapReader* fBitmapStorage; | |
123 SkTypeface** fTFArray; | |
124 int fTFCount; | |
125 | |
126 SkTDArray<SkFlattenable::Factory>* fFactoryTDArray; | |
127 SkFlattenable::Factory* fFactoryArray; | |
128 int fFactoryCount; | |
129 | |
130 SkPicture::InstallPixelRefProc fBitmapDecoder; | |
131 | |
132 #ifdef DEBUG_NON_DETERMINISTIC_ASSERT | |
133 // Debugging counter to keep track of how many bitmaps we | |
134 // have decoded. | |
135 int fDecodedBitmapIndex; | |
136 #endif // DEBUG_NON_DETERMINISTIC_ASSERT | |
137 | |
138 typedef SkFlattenableReadBuffer INHERITED; | |
139 }; | |
140 | |
141 #endif // SkSecureReadBuffer_DEFINED | |
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