blob: 9ec0a5458a0a8527c5ae26c6f5dc88bf34177c9b [file] [log] [blame]
/*
* Copyright (C) 2008-2016 Apple Inc. All rights reserved.
* Copyright (C) 2014 Adobe Systems Incorporated. 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 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"
#include <JavaScriptCore/JSCInlines.h>
#include <JavaScriptCore/TypedArrayInlines.h>
namespace WebCore {
ExceptionOr<Ref<ImageData>> ImageData::create(unsigned sw, unsigned sh)
{
if (!sw || !sh)
return Exception { IndexSizeError };
Checked<int, RecordOverflow> dataSize = 4;
dataSize *= sw;
dataSize *= sh;
if (dataSize.hasOverflowed())
return Exception { RangeError, ASCIILiteral("Cannot allocate a buffer of this size") };
IntSize size(sw, sh);
auto data = adoptRef(*new ImageData(size));
data->data()->zeroFill();
return WTFMove(data);
}
RefPtr<ImageData> ImageData::create(const IntSize& size)
{
Checked<int, RecordOverflow> dataSize = 4;
dataSize *= size.width();
dataSize *= size.height();
if (dataSize.hasOverflowed())
return nullptr;
return adoptRef(*new ImageData(size));
}
RefPtr<ImageData> ImageData::create(const IntSize& size, Ref<Uint8ClampedArray>&& byteArray)
{
Checked<int, RecordOverflow> dataSize = 4;
dataSize *= size.width();
dataSize *= size.height();
if (dataSize.hasOverflowed())
return nullptr;
if (dataSize.unsafeGet() < 0 || static_cast<unsigned>(dataSize.unsafeGet()) > byteArray->length())
return nullptr;
return adoptRef(*new ImageData(size, WTFMove(byteArray)));
}
ExceptionOr<RefPtr<ImageData>> ImageData::create(Ref<Uint8ClampedArray>&& byteArray, unsigned sw, std::optional<unsigned> sh)
{
unsigned length = byteArray->length();
if (!length || length % 4)
return Exception { InvalidStateError, ASCIILiteral("Length is not a non-zero multiple of 4") };
ASSERT(length > 0);
length /= 4;
if (!sw || length % sw)
return Exception { IndexSizeError, ASCIILiteral("Length is not a multiple of sw") };
unsigned height = length / sw;
if (sh && sh.value() != height)
return Exception { IndexSizeError, ASCIILiteral("sh value is not equal to height") };
return create(IntSize(sw, height), WTFMove(byteArray));
}
ImageData::ImageData(const IntSize& size)
: m_size(size)
, m_data(Uint8ClampedArray::createUninitialized((size.area() * 4).unsafeGet()))
{
ASSERT(m_data);
}
ImageData::ImageData(const IntSize& size, Ref<Uint8ClampedArray>&& byteArray)
: m_size(size)
, m_data(WTFMove(byteArray))
{
ASSERT(m_data);
ASSERT_WITH_SECURITY_IMPLICATION(!m_data || (size.area() * 4).unsafeGet() <= m_data->length());
}
}