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/*
* Copyright (C) 2008 Apple Inc. All rights reserved.
*
* 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.
* 3. Neither the name of Apple Computer, Inc. ("Apple") nor the names of
* its contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "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 OR ITS 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.
*/
#include "config.h"
#include "ImageData.h"
namespace WebCore {
PassRefPtr<ImageData> ImageData::create(const IntSize& size)
{
Checked<int, RecordOverflow> dataSize = 4;
dataSize *= size.width();
dataSize *= size.height();
if (dataSize.hasOverflowed())
return 0;
return adoptRef(new ImageData(size));
}
PassRefPtr<ImageData> ImageData::create(const IntSize& size, PassRefPtr<Uint8ClampedArray> byteArray)
{
Checked<int, RecordOverflow> dataSize = 4;
dataSize *= size.width();
dataSize *= size.height();
if (dataSize.hasOverflowed())
return 0;
if (dataSize.unsafeGet() < 0
|| static_cast<unsigned>(dataSize.unsafeGet()) > byteArray->length())
return 0;
return adoptRef(new ImageData(size, byteArray));
}
ImageData::ImageData(const IntSize& size)
: m_size(size)
, m_data(Uint8ClampedArray::createUninitialized(size.width() * size.height() * 4))
{
}
ImageData::ImageData(const IntSize& size, PassRefPtr<Uint8ClampedArray> byteArray)
: m_size(size)
, m_data(byteArray)
{
ASSERT(static_cast<unsigned>(size.width() * size.height() * 4) <= m_data->length());
}
}
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