| /* |
| * Copyright (C) 2009 Apple Inc. All rights reserved. |
| * Copyright (C) 2009 Google Inc. All rights reserved. |
| * Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies). |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * |
| * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY |
| * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR |
| * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
| * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
| * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY |
| * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #ifndef Uint8ClampedArray_h |
| #define Uint8ClampedArray_h |
| |
| #include <wtf/Platform.h> |
| |
| #include <wtf/Uint8Array.h> |
| #include <wtf/MathExtras.h> |
| |
| namespace WTF { |
| |
| class Uint8ClampedArray : public Uint8Array { |
| public: |
| static inline PassRefPtr<Uint8ClampedArray> create(unsigned length); |
| static inline PassRefPtr<Uint8ClampedArray> create(const unsigned char* array, unsigned length); |
| static inline PassRefPtr<Uint8ClampedArray> create(PassRefPtr<ArrayBuffer>, unsigned byteOffset, unsigned length); |
| |
| // Should only be used when it is known the entire array will be filled. Do |
| // not return these results directly to JavaScript without filling first. |
| static inline PassRefPtr<Uint8ClampedArray> createUninitialized(unsigned length); |
| |
| // It's only needed to potentially call this method if the array |
| // was created uninitialized -- the default initialization paths |
| // zero the allocated memory. |
| inline void zeroFill(); |
| |
| // Can’t use "using" here due to a bug in the RVCT compiler. |
| bool set(TypedArrayBase<unsigned char>* array, unsigned offset) { return TypedArrayBase<unsigned char>::set(array, offset); } |
| inline void set(unsigned index, double value); |
| |
| inline PassRefPtr<Uint8ClampedArray> subarray(int start) const; |
| inline PassRefPtr<Uint8ClampedArray> subarray(int start, int end) const; |
| |
| virtual ViewType getType() const |
| { |
| return TypeUint8Clamped; |
| } |
| |
| private: |
| inline Uint8ClampedArray(PassRefPtr<ArrayBuffer>, |
| unsigned byteOffset, |
| unsigned length); |
| // Make constructor visible to superclass. |
| friend class TypedArrayBase<unsigned char>; |
| }; |
| |
| PassRefPtr<Uint8ClampedArray> Uint8ClampedArray::create(unsigned length) |
| { |
| return TypedArrayBase<unsigned char>::create<Uint8ClampedArray>(length); |
| } |
| |
| PassRefPtr<Uint8ClampedArray> Uint8ClampedArray::create(const unsigned char* array, unsigned length) |
| { |
| return TypedArrayBase<unsigned char>::create<Uint8ClampedArray>(array, length); |
| } |
| |
| PassRefPtr<Uint8ClampedArray> Uint8ClampedArray::create(PassRefPtr<ArrayBuffer> buffer, unsigned byteOffset, unsigned length) |
| { |
| return TypedArrayBase<unsigned char>::create<Uint8ClampedArray>(buffer, byteOffset, length); |
| } |
| |
| PassRefPtr<Uint8ClampedArray> Uint8ClampedArray::createUninitialized(unsigned length) |
| { |
| return TypedArrayBase<unsigned char>::createUninitialized<Uint8ClampedArray>(length); |
| } |
| |
| void Uint8ClampedArray::zeroFill() |
| { |
| zeroRange(0, length()); |
| } |
| |
| void Uint8ClampedArray::set(unsigned index, double value) |
| { |
| if (index >= m_length) |
| return; |
| if (isnan(value) || value < 0) |
| value = 0; |
| else if (value > 255) |
| value = 255; |
| data()[index] = static_cast<unsigned char>(lrint(value)); |
| } |
| |
| Uint8ClampedArray::Uint8ClampedArray(PassRefPtr<ArrayBuffer> buffer, unsigned byteOffset, unsigned length) |
| : Uint8Array(buffer, byteOffset, length) |
| { |
| } |
| |
| PassRefPtr<Uint8ClampedArray> Uint8ClampedArray::subarray(int start) const |
| { |
| return subarray(start, length()); |
| } |
| |
| PassRefPtr<Uint8ClampedArray> Uint8ClampedArray::subarray(int start, int end) const |
| { |
| return subarrayImpl<Uint8ClampedArray>(start, end); |
| } |
| |
| } // namespace WTF |
| |
| using WTF::Uint8ClampedArray; |
| |
| #endif // Uint8ClampedArray_h |