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| 1 /* | |
| 2 * Copyright (C) 2009 Apple Inc. All rights reserved. | |
| 3 * Copyright (C) 2009 Google Inc. All rights reserved. | |
| 4 * Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies). | |
| 5 * | |
| 6 * Redistribution and use in source and binary forms, with or without | |
| 7 * modification, are permitted provided that the following conditions | |
| 8 * are met: | |
| 9 * 1. Redistributions of source code must retain the above copyright | |
| 10 * notice, this list of conditions and the following disclaimer. | |
| 11 * 2. Redistributions in binary form must reproduce the above copyright | |
| 12 * notice, this list of conditions and the following disclaimer in the | |
| 13 * documentation and/or other materials provided with the distribution. | |
| 14 * | |
| 15 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY | |
| 16 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
| 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR | |
| 18 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR | |
| 19 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, | |
| 20 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, | |
| 21 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR | |
| 22 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY | |
| 23 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
| 24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | |
| 25 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
| 26 */ | |
| 27 | |
| 28 #ifndef Uint8ClampedArray_h | |
| 29 #define Uint8ClampedArray_h | |
| 30 | |
| 31 #include "wtf/Uint8Array.h" | |
| 32 #include "wtf/MathExtras.h" | |
| 33 | |
| 34 namespace WTF { | |
| 35 | |
| 36 class Uint8ClampedArray final : public Uint8Array { | |
| 37 public: | |
| 38 static inline PassRefPtr<Uint8ClampedArray> create(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); | |
| 41 | |
| 42 using TypedArrayBase<unsigned char>::set; | |
| 43 inline void set(unsigned index, double value); | |
| 44 | |
| 45 ViewType type() const override | |
| 46 { | |
| 47 return TypeUint8Clamped; | |
| 48 } | |
| 49 | |
| 50 private: | |
| 51 inline Uint8ClampedArray(PassRefPtr<ArrayBuffer>, unsigned byteOffset, unsig
ned length); | |
| 52 // Make constructor visible to superclass. | |
| 53 friend class TypedArrayBase<unsigned char>; | |
| 54 }; | |
| 55 | |
| 56 PassRefPtr<Uint8ClampedArray> Uint8ClampedArray::create(unsigned length) | |
| 57 { | |
| 58 return TypedArrayBase<unsigned char>::create<Uint8ClampedArray>(length); | |
| 59 } | |
| 60 | |
| 61 PassRefPtr<Uint8ClampedArray> Uint8ClampedArray::create(const unsigned char* arr
ay, unsigned length) | |
| 62 { | |
| 63 return TypedArrayBase<unsigned char>::create<Uint8ClampedArray>(array, lengt
h); | |
| 64 } | |
| 65 | |
| 66 PassRefPtr<Uint8ClampedArray> Uint8ClampedArray::create(PassRefPtr<ArrayBuffer>
buffer, unsigned byteOffset, unsigned length) | |
| 67 { | |
| 68 return TypedArrayBase<unsigned char>::create<Uint8ClampedArray>(buffer, byte
Offset, length); | |
| 69 } | |
| 70 | |
| 71 void Uint8ClampedArray::set(unsigned index, double value) | |
| 72 { | |
| 73 if (index >= m_length) | |
| 74 return; | |
| 75 if (std::isnan(value) || value < 0) | |
| 76 value = 0; | |
| 77 else if (value > 255) | |
| 78 value = 255; | |
| 79 data()[index] = static_cast<unsigned char>(lrint(value)); | |
| 80 } | |
| 81 | |
| 82 Uint8ClampedArray::Uint8ClampedArray(PassRefPtr<ArrayBuffer> buffer, unsigned by
teOffset, unsigned length) | |
| 83 : Uint8Array(buffer, byteOffset, length) | |
| 84 { | |
| 85 } | |
| 86 | |
| 87 } // namespace WTF | |
| 88 | |
| 89 using WTF::Uint8ClampedArray; | |
| 90 | |
| 91 #endif // Uint8ClampedArray_h | |
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