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 class SkValidatingReadBuffer : public SkFlattenableReadBuffer { 21 public: 22 SkValidatingReadBuffer(const void* data, size_t size); 23 virtual ~SkValidatingReadBuffer(); 24 25 const void* skip(size_t size); 26 27 // primitives 28 virtual bool readBool() SK_OVERRIDE; 29 virtual SkColor readColor() SK_OVERRIDE; 30 virtual SkFixed readFixed() SK_OVERRIDE; 31 virtual int32_t readInt() SK_OVERRIDE; 32 virtual SkScalar readScalar() SK_OVERRIDE; 33 virtual uint32_t readUInt() SK_OVERRIDE; 34 virtual int32_t read32() SK_OVERRIDE; 35 36 // strings -- the caller is responsible for freeing the string contents 37 virtual void readString(SkString* string) SK_OVERRIDE; 38 virtual void* readEncodedString(size_t* length, SkPaint::TextEncoding encoding) SK_OVERRIDE; 39 40 // common data structures 41 virtual SkFlattenable* readFlattenable(SkFlattenable::Type type) SK_OVERRIDE; 42 virtual void readPoint(SkPoint* point) SK_OVERRIDE; 43 virtual void readMatrix(SkMatrix* matrix) SK_OVERRIDE; 44 virtual void readIRect(SkIRect* rect) SK_OVERRIDE; 45 virtual void readRect(SkRect* rect) SK_OVERRIDE; 46 virtual void readRegion(SkRegion* region) SK_OVERRIDE; 47 virtual void readPath(SkPath* path) SK_OVERRIDE; 48 49 // binary data and arrays 50 virtual bool readByteArray(void* value, size_t size) SK_OVERRIDE; 51 virtual bool readColorArray(SkColor* colors, size_t size) SK_OVERRIDE; 52 virtual bool readIntArray(int32_t* values, size_t size) SK_OVERRIDE; 53 virtual bool readPointArray(SkPoint* points, size_t size) SK_OVERRIDE; 54 virtual bool readScalarArray(SkScalar* values, size_t size) SK_OVERRIDE; 55 56 // helpers to get info about arrays and binary data 57 virtual uint32_t getArrayCount() SK_OVERRIDE; 58 59 virtual void readBitmap(SkBitmap* bitmap) SK_OVERRIDE; 60 // TODO: Implement this (securely) when needed 61 virtual SkTypeface* readTypeface() SK_OVERRIDE; 62 63 virtual bool validate(bool isValid) SK_OVERRIDE; 64 virtual bool isValid() const SK_OVERRIDE; 65 66 private: 67 bool readArray(void* value, size_t size, size_t elementSize); 68 69 void setMemory(const void* data, size_t size); 70 71 static bool IsPtrAlign4(const void* ptr) { 72 return SkIsAlign4((uintptr_t)ptr); 73 } 74 75 SkReader32 fReader; 76 bool fError; 77 78 typedef SkFlattenableReadBuffer INHERITED; 79 }; 80 81 #endif // SkValidatingReadBuffer_DEFINED 82
