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1 /* | |
2 * Copyright (C) 2010 Apple Inc. All rights reserved. | |
3 * Copyright (c) 2010, Google Inc. All rights reserved. | |
4 * | |
5 * Redistribution and use in source and binary forms, with or without | |
6 * modification, are permitted provided that the following conditions | |
7 * are met: | |
8 * 1. Redistributions of source code must retain the above copyright | |
9 * notice, this list of conditions and the following disclaimer. | |
10 * 2. Redistributions in binary form must reproduce the above copyright | |
11 * notice, this list of conditions and the following disclaimer in the | |
12 * documentation and/or other materials provided with the distribution. | |
13 * | |
14 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY | |
15 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR | |
17 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR | |
18 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, | |
19 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, | |
20 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR | |
21 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY | |
22 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | |
24 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
25 */ | |
26 | |
27 #ifndef IntegralTypedArrayBase_h | |
28 #define IntegralTypedArrayBase_h | |
29 | |
30 #include <wtf/TypedArrayBase.h> | |
31 #include <limits> | |
32 #include <wtf/MathExtras.h> | |
33 | |
34 // Base class for all WebGL<T>Array types holding integral | |
35 // (non-floating-point) values. | |
36 | |
37 namespace WTF { | |
38 | |
39 template <typename T> | |
40 class IntegralTypedArrayBase : public TypedArrayBase<T> { | |
41 public: | |
42 void set(unsigned index, double value) | |
43 { | |
44 if (index >= TypedArrayBase<T>::m_length) | |
45 return; | |
46 if (std::isnan(value)) // Clamp NaN to 0 | |
47 value = 0; | |
48 // The double cast is necessary to get the correct wrapping | |
49 // for out-of-range values with Int32Array and Uint32Array. | |
50 TypedArrayBase<T>::data()[index] = static_cast<T>(static_cast<int64_t>(v
alue)); | |
51 } | |
52 | |
53 protected: | |
54 IntegralTypedArrayBase(PassRefPtr<ArrayBuffer> buffer, unsigned byteOffset,
unsigned length) | |
55 : TypedArrayBase<T>(buffer, byteOffset, length) | |
56 { | |
57 } | |
58 }; | |
59 | |
60 } // namespace WTF | |
61 | |
62 using WTF::IntegralTypedArrayBase; | |
63 | |
64 #endif // IntegralTypedArrayBase_h | |
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