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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 SkValidatingReadBuffer_DEFINED |
| 9 #define SkValidatingReadBuffer_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 SkValidatingReadBuffer : public SkFlattenableReadBuffer { |
| 25 public: |
| 26 SkValidatingReadBuffer(); |
| 27 SkValidatingReadBuffer(const void* data, size_t size); |
| 28 SkValidatingReadBuffer(SkStream* stream); |
| 29 virtual ~SkValidatingReadBuffer(); |
| 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 // SkValidatingReadBuffer_DEFINED |
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