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| 1 /* | 1 /* |
| 2 * Copyright (C) 2009 Apple Inc. All rights reserved. | 2 * Copyright (C) 2009 Apple Inc. All rights reserved. |
| 3 * Copyright (C) 2009 Google Inc. All rights reserved. | 3 * Copyright (C) 2009 Google Inc. All rights reserved. |
| 4 * Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies). | 4 * Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies). |
| 5 * | 5 * |
| 6 * Redistribution and use in source and binary forms, with or without | 6 * Redistribution and use in source and binary forms, with or without |
| 7 * modification, are permitted provided that the following conditions | 7 * modification, are permitted provided that the following conditions |
| 8 * are met: | 8 * are met: |
| 9 * 1. Redistributions of source code must retain the above copyright | 9 * 1. Redistributions of source code must retain the above copyright |
| 10 * notice, this list of conditions and the following disclaimer. | 10 * notice, this list of conditions and the following disclaimer. |
| (...skipping 21 matching lines...) Expand all Loading... |
| 32 #include "wtf/MathExtras.h" | 32 #include "wtf/MathExtras.h" |
| 33 | 33 |
| 34 namespace WTF { | 34 namespace WTF { |
| 35 | 35 |
| 36 class Uint8ClampedArray final : public Uint8Array { | 36 class Uint8ClampedArray final : public Uint8Array { |
| 37 public: | 37 public: |
| 38 static inline PassRefPtr<Uint8ClampedArray> create(unsigned length); | 38 static inline PassRefPtr<Uint8ClampedArray> create(unsigned length); |
| 39 static inline PassRefPtr<Uint8ClampedArray> create(const unsigned char* arra
y, unsigned length); | 39 static inline PassRefPtr<Uint8ClampedArray> create(const unsigned char* arra
y, unsigned length); |
| 40 static inline PassRefPtr<Uint8ClampedArray> create(PassRefPtr<ArrayBuffer>,
unsigned byteOffset, unsigned length); | 40 static inline PassRefPtr<Uint8ClampedArray> create(PassRefPtr<ArrayBuffer>,
unsigned byteOffset, unsigned length); |
| 41 | 41 |
| 42 // Should only be used when it is known the entire array will be filled. Do | |
| 43 // not return these results directly to JavaScript without filling first. | |
| 44 static inline PassRefPtr<Uint8ClampedArray> createUninitialized(unsigned len
gth); | |
| 45 | |
| 46 // It's only needed to potentially call this method if the array | |
| 47 // was created uninitialized -- the default initialization paths | |
| 48 // zero the allocated memory. | |
| 49 inline void zeroFill(); | |
| 50 | |
| 51 using TypedArrayBase<unsigned char>::set; | 42 using TypedArrayBase<unsigned char>::set; |
| 52 inline void set(unsigned index, double value); | 43 inline void set(unsigned index, double value); |
| 53 | 44 |
| 54 inline PassRefPtr<Uint8ClampedArray> subarray(int start) const; | |
| 55 inline PassRefPtr<Uint8ClampedArray> subarray(int start, int end) const; | |
| 56 | |
| 57 virtual ViewType type() const override | 45 virtual ViewType type() const override |
| 58 { | 46 { |
| 59 return TypeUint8Clamped; | 47 return TypeUint8Clamped; |
| 60 } | 48 } |
| 61 | 49 |
| 62 private: | 50 private: |
| 63 inline Uint8ClampedArray(PassRefPtr<ArrayBuffer>, | 51 inline Uint8ClampedArray(PassRefPtr<ArrayBuffer>, |
| 64 unsigned byteOffset, | 52 unsigned byteOffset, |
| 65 unsigned length); | 53 unsigned length); |
| 66 // Make constructor visible to superclass. | 54 // Make constructor visible to superclass. |
| 67 friend class TypedArrayBase<unsigned char>; | 55 friend class TypedArrayBase<unsigned char>; |
| 68 }; | 56 }; |
| 69 | 57 |
| 70 PassRefPtr<Uint8ClampedArray> Uint8ClampedArray::create(unsigned length) | 58 PassRefPtr<Uint8ClampedArray> Uint8ClampedArray::create(unsigned length) |
| 71 { | 59 { |
| 72 return TypedArrayBase<unsigned char>::create<Uint8ClampedArray>(length); | 60 return TypedArrayBase<unsigned char>::create<Uint8ClampedArray>(length); |
| 73 } | 61 } |
| 74 | 62 |
| 75 PassRefPtr<Uint8ClampedArray> Uint8ClampedArray::create(const unsigned char* arr
ay, unsigned length) | 63 PassRefPtr<Uint8ClampedArray> Uint8ClampedArray::create(const unsigned char* arr
ay, unsigned length) |
| 76 { | 64 { |
| 77 return TypedArrayBase<unsigned char>::create<Uint8ClampedArray>(array, lengt
h); | 65 return TypedArrayBase<unsigned char>::create<Uint8ClampedArray>(array, lengt
h); |
| 78 } | 66 } |
| 79 | 67 |
| 80 PassRefPtr<Uint8ClampedArray> Uint8ClampedArray::create(PassRefPtr<ArrayBuffer>
buffer, unsigned byteOffset, unsigned length) | 68 PassRefPtr<Uint8ClampedArray> Uint8ClampedArray::create(PassRefPtr<ArrayBuffer>
buffer, unsigned byteOffset, unsigned length) |
| 81 { | 69 { |
| 82 return TypedArrayBase<unsigned char>::create<Uint8ClampedArray>(buffer, byte
Offset, length); | 70 return TypedArrayBase<unsigned char>::create<Uint8ClampedArray>(buffer, byte
Offset, length); |
| 83 } | 71 } |
| 84 | 72 |
| 85 PassRefPtr<Uint8ClampedArray> Uint8ClampedArray::createUninitialized(unsigned le
ngth) | |
| 86 { | |
| 87 return TypedArrayBase<unsigned char>::createUninitialized<Uint8ClampedArray>
(length); | |
| 88 } | |
| 89 | |
| 90 void Uint8ClampedArray::zeroFill() | |
| 91 { | |
| 92 zeroRange(0, length()); | |
| 93 } | |
| 94 | |
| 95 void Uint8ClampedArray::set(unsigned index, double value) | 73 void Uint8ClampedArray::set(unsigned index, double value) |
| 96 { | 74 { |
| 97 if (index >= m_length) | 75 if (index >= m_length) |
| 98 return; | 76 return; |
| 99 if (std::isnan(value) || value < 0) | 77 if (std::isnan(value) || value < 0) |
| 100 value = 0; | 78 value = 0; |
| 101 else if (value > 255) | 79 else if (value > 255) |
| 102 value = 255; | 80 value = 255; |
| 103 data()[index] = static_cast<unsigned char>(lrint(value)); | 81 data()[index] = static_cast<unsigned char>(lrint(value)); |
| 104 } | 82 } |
| 105 | 83 |
| 106 Uint8ClampedArray::Uint8ClampedArray(PassRefPtr<ArrayBuffer> buffer, unsigned by
teOffset, unsigned length) | 84 Uint8ClampedArray::Uint8ClampedArray(PassRefPtr<ArrayBuffer> buffer, unsigned by
teOffset, unsigned length) |
| 107 : Uint8Array(buffer, byteOffset, length) | 85 : Uint8Array(buffer, byteOffset, length) |
| 108 { | 86 { |
| 109 } | 87 } |
| 110 | 88 |
| 111 PassRefPtr<Uint8ClampedArray> Uint8ClampedArray::subarray(int start) const | |
| 112 { | |
| 113 return subarray(start, length()); | |
| 114 } | |
| 115 | |
| 116 PassRefPtr<Uint8ClampedArray> Uint8ClampedArray::subarray(int start, int end) co
nst | |
| 117 { | |
| 118 return subarrayImpl<Uint8ClampedArray>(start, end); | |
| 119 } | |
| 120 | |
| 121 } // namespace WTF | 89 } // namespace WTF |
| 122 | 90 |
| 123 using WTF::Uint8ClampedArray; | 91 using WTF::Uint8ClampedArray; |
| 124 | 92 |
| 125 #endif // Uint8ClampedArray_h | 93 #endif // Uint8ClampedArray_h |
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