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28 #ifndef Uint8ClampedArray_h
29 #define Uint8ClampedArray_h
31 #include <wtf/Platform.h>
33 #include <wtf/Uint8Array.h>
34 #include <wtf/MathExtras.h>
38 class Uint8ClampedArray : public Uint8Array {
40 static inline PassRefPtr<Uint8ClampedArray> create(unsigned length);
41 static inline PassRefPtr<Uint8ClampedArray> create(const unsigned char* array, unsigned length);
42 static inline PassRefPtr<Uint8ClampedArray> create(PassRefPtr<ArrayBuffer>, unsigned byteOffset, unsigned length);
44 // Should only be used when it is known the entire array will be filled. Do
45 // not return these results directly to JavaScript without filling first.
46 static inline PassRefPtr<Uint8ClampedArray> createUninitialized(unsigned length);
48 // It's only needed to potentially call this method if the array
49 // was created uninitialized -- the default initialization paths
50 // zero the allocated memory.
51 inline void zeroFill();
53 // Can’t use "using" here due to a bug in the RVCT compiler.
54 bool set(TypedArrayBase<unsigned char>* array, unsigned offset) { return TypedArrayBase<unsigned char>::set(array, offset); }
55 inline void set(unsigned index, double value);
57 inline PassRefPtr<Uint8ClampedArray> subarray(int start) const;
58 inline PassRefPtr<Uint8ClampedArray> subarray(int start, int end) const;
60 virtual ViewType getType() const
62 return TypeUint8Clamped;
66 inline Uint8ClampedArray(PassRefPtr<ArrayBuffer>,
69 // Make constructor visible to superclass.
70 friend class TypedArrayBase<unsigned char>;
73 PassRefPtr<Uint8ClampedArray> Uint8ClampedArray::create(unsigned length)
75 return TypedArrayBase<unsigned char>::create<Uint8ClampedArray>(length);
78 PassRefPtr<Uint8ClampedArray> Uint8ClampedArray::create(const unsigned char* array, unsigned length)
80 return TypedArrayBase<unsigned char>::create<Uint8ClampedArray>(array, length);
83 PassRefPtr<Uint8ClampedArray> Uint8ClampedArray::create(PassRefPtr<ArrayBuffer> buffer, unsigned byteOffset, unsigned length)
85 return TypedArrayBase<unsigned char>::create<Uint8ClampedArray>(buffer, byteOffset, length);
88 PassRefPtr<Uint8ClampedArray> Uint8ClampedArray::createUninitialized(unsigned length)
90 return TypedArrayBase<unsigned char>::createUninitialized<Uint8ClampedArray>(length);
93 void Uint8ClampedArray::zeroFill()
95 zeroRange(0, length());
98 void Uint8ClampedArray::set(unsigned index, double value)
100 if (index >= m_length)
102 if (isnan(value) || value < 0)
104 else if (value > 255)
106 data()[index] = static_cast<unsigned char>(lrint(value));
109 Uint8ClampedArray::Uint8ClampedArray(PassRefPtr<ArrayBuffer> buffer, unsigned byteOffset, unsigned length)
110 : Uint8Array(buffer, byteOffset, length)
114 PassRefPtr<Uint8ClampedArray> Uint8ClampedArray::subarray(int start) const
116 return subarray(start, length());
119 PassRefPtr<Uint8ClampedArray> Uint8ClampedArray::subarray(int start, int end) const
121 return subarrayImpl<Uint8ClampedArray>(start, end);
126 using WTF::Uint8ClampedArray;
128 #endif // Uint8ClampedArray_h