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Side by Side Diff: third_party/WebKit/Source/wtf/Uint8ClampedArray.h

Issue 1875343002: Move WTF classes related to typed arrays to wtf/typed_arrays (Closed) Base URL: https://chromium.googlesource.com/chromium/src.git@master
Patch Set: Created 4 years, 8 months ago
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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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