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/*
* 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
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