1 2 /* 3 * Copyright 2012 Google Inc. 4 * 5 * Use of this source code is governed by a BSD-style license that can be 6 * found in the LICENSE file. 7 */ 8 9 #ifndef SkFlattenableBuffers_DEFINED 10 #define SkFlattenableBuffers_DEFINED 11 12 #include "SkColor.h" 13 #include "SkPaint.h" 14 #include "SkPoint.h" 15 16 class SkBitmap; 17 class SkFlattenable; 18 struct SkIRect; 19 class SkMatrix; 20 class SkOrderedReadBuffer; 21 class SkOrderedWriteBuffer; 22 class SkPath; 23 class SkPixelRef; 24 struct SkRect; 25 class SkRefCnt; 26 class SkRegion; 27 class SkStream; 28 class SkString; 29 class SkTypeface; 30 class SkWStream; 31 32 class SkFlattenableReadBuffer { 33 public: 34 SkFlattenableReadBuffer(); 35 virtual ~SkFlattenableReadBuffer(); 36 37 bool isOrderedBinaryBuffer() { return NULL != getOrderedBinaryBuffer(); } 38 virtual SkOrderedReadBuffer* getOrderedBinaryBuffer() { return NULL; } 39 40 enum Flags { 41 kCrossProcess_Flag = 1 << 0, 42 kScalarIsFloat_Flag = 1 << 1, 43 kPtrIs64Bit_Flag = 1 << 2, 44 }; 45 46 void setFlags(uint32_t flags) { fFlags = flags; } 47 uint32_t getFlags() const { return fFlags; } 48 49 bool isCrossProcess() const { return SkToBool(fFlags & kCrossProcess_Flag); } 50 bool isScalarFloat() const { return SkToBool(fFlags & kScalarIsFloat_Flag); } 51 bool isPtr64Bit() const { return SkToBool(fFlags & kPtrIs64Bit_Flag); } 52 53 // primitives 54 virtual bool readBool() = 0; 55 virtual SkColor readColor() = 0; 56 virtual SkFixed readFixed() = 0; 57 virtual int32_t readInt() = 0; 58 virtual SkScalar readScalar() = 0; 59 virtual uint32_t readUInt() = 0; 60 virtual int32_t read32() = 0; 61 62 // strings -- the caller is responsible for freeing the string contents 63 virtual void readString(SkString* string) = 0; 64 virtual void* readEncodedString(size_t* length, SkPaint::TextEncoding encoding) = 0; 65 66 // common data structures 67 virtual SkFlattenable* readFlattenable() = 0; 68 virtual void readPoint(SkPoint* point) = 0; 69 virtual void readMatrix(SkMatrix* matrix) = 0; 70 virtual void readIRect(SkIRect* rect) = 0; 71 virtual void readRect(SkRect* rect) = 0; 72 virtual void readRegion(SkRegion* region) = 0; 73 virtual void readPath(SkPath* path) = 0; 74 75 // binary data and arrays 76 virtual uint32_t readByteArray(void* value) = 0; 77 virtual uint32_t readColorArray(SkColor* colors) = 0; 78 virtual uint32_t readIntArray(int32_t* values) = 0; 79 virtual uint32_t readPointArray(SkPoint* points) = 0; 80 virtual uint32_t readScalarArray(SkScalar* values) = 0; 81 82 /** This helper peeks into the buffer and reports back the length of the next array in 83 * the buffer but does not change the state of the buffer. 84 */ 85 virtual uint32_t getArrayCount() = 0; 86 87 // helper functions 88 virtual void* readFunctionPtr(); 89 virtual void readPaint(SkPaint* paint); 90 91 virtual void readBitmap(SkBitmap* bitmap) = 0; 92 virtual SkTypeface* readTypeface() = 0; 93 94 // helper function for classes with const SkPoint members 95 SkPoint readPoint() { 96 SkPoint point; 97 this->readPoint(&point); 98 return point; 99 } 100 101 template <typename T> T* readFlattenableT() { 102 return static_cast<T*>(this->readFlattenable()); 103 } 104 105 private: 106 uint32_t fFlags; 107 }; 108 109 /////////////////////////////////////////////////////////////////////////////// 110 111 class SkFlattenableWriteBuffer { 112 public: 113 SkFlattenableWriteBuffer(); 114 virtual ~SkFlattenableWriteBuffer(); 115 116 virtual bool isOrderedBinaryBuffer() { return false; } 117 virtual SkOrderedWriteBuffer* getOrderedBinaryBuffer() { sk_throw(); return NULL; } 118 119 // primitives 120 virtual void writeByteArray(const void* data, size_t size) = 0; 121 virtual void writeBool(bool value) = 0; 122 virtual void writeFixed(SkFixed value) = 0; 123 virtual void writeScalar(SkScalar value) = 0; 124 virtual void writeScalarArray(const SkScalar* value, uint32_t count) = 0; 125 virtual void writeInt(int32_t value) = 0; 126 virtual void writeIntArray(const int32_t* value, uint32_t count) = 0; 127 virtual void writeUInt(uint32_t value) = 0; 128 virtual void write32(int32_t value) = 0; // printf in hex 129 virtual void writeString(const char* value) = 0; 130 virtual void writeEncodedString(const void* value, size_t byteLength, 131 SkPaint::TextEncoding encoding) = 0; 132 133 // common data structures 134 virtual void writeFlattenable(SkFlattenable* flattenable) = 0; 135 virtual void writeColor(const SkColor& color) = 0; 136 virtual void writeColorArray(const SkColor* color, uint32_t count) = 0; 137 virtual void writePoint(const SkPoint& point) = 0; 138 virtual void writePointArray(const SkPoint* points, uint32_t count) = 0; 139 virtual void writeMatrix(const SkMatrix& matrix) = 0; 140 virtual void writeIRect(const SkIRect& rect) = 0; 141 virtual void writeRect(const SkRect& rect) = 0; 142 virtual void writeRegion(const SkRegion& region) = 0; 143 virtual void writePath(const SkPath& path) = 0; 144 virtual size_t writeStream(SkStream* stream, size_t length) = 0; 145 146 // helper functions 147 virtual void writeFunctionPtr(void* ptr); 148 virtual void writePaint(const SkPaint& paint); 149 150 virtual void writeBitmap(const SkBitmap& bitmap) = 0; 151 virtual void writeTypeface(SkTypeface* typeface) = 0; 152 153 virtual bool writeToStream(SkWStream*) = 0; 154 155 enum Flags { 156 kCrossProcess_Flag = 0x01, 157 }; 158 159 uint32_t getFlags() const { return fFlags; } 160 void setFlags(uint32_t flags) { fFlags = flags; } 161 162 bool isCrossProcess() const { 163 return SkToBool(fFlags & kCrossProcess_Flag); 164 } 165 166 bool persistTypeface() const { return (fFlags & kCrossProcess_Flag) != 0; } 167 168 protected: 169 // A helper function so that each subclass does not have to be a friend of SkFlattenable 170 void flattenObject(SkFlattenable* obj, SkFlattenableWriteBuffer& buffer); 171 172 uint32_t fFlags; 173 }; 174 175 #endif 176
