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/*
* Copyright (C) 2021-2022 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.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. 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 INC. 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 "PixelBuffer.h"
#include <JavaScriptCore/TypedArrayInlines.h>
#include <wtf/text/TextStream.h>
namespace WebCore {
bool PixelBuffer::supportedPixelFormat(PixelFormat pixelFormat)
{
switch (pixelFormat) {
case PixelFormat::RGBA8:
case PixelFormat::BGRA8:
return true;
case PixelFormat::BGRX8:
case PixelFormat::RGB10:
case PixelFormat::RGB10A8:
return false;
}
ASSERT_NOT_REACHED();
return false;
}
CheckedUint32 PixelBuffer::computeBufferSize(const PixelBufferFormat& format, const IntSize& size)
{
ASSERT_UNUSED(format, supportedPixelFormat(format.pixelFormat));
constexpr unsigned bytesPerPixel = 4;
return size.area<RecordOverflow>() * bytesPerPixel;
}
PixelBuffer::PixelBuffer(const PixelBufferFormat& format, const IntSize& size, uint8_t* bytes, size_t sizeInBytes)
: m_format(format)
, m_size(size)
, m_bytes(bytes)
, m_sizeInBytes(sizeInBytes)
{
RELEASE_ASSERT_WITH_SECURITY_IMPLICATION((m_size.area() * 4) <= m_sizeInBytes);
}
PixelBuffer::~PixelBuffer() = default;
bool PixelBuffer::setRange(const uint8_t* data, size_t dataByteLength, size_t byteOffset)
{
if (!isSumSmallerThanOrEqual(byteOffset, dataByteLength, m_sizeInBytes))
return false;
memmove(m_bytes + byteOffset, data, dataByteLength);
return true;
}
bool PixelBuffer::zeroRange(size_t byteOffset, size_t rangeByteLength)
{
if (!isSumSmallerThanOrEqual(byteOffset, rangeByteLength, m_sizeInBytes))
return false;
memset(m_bytes + byteOffset, 0, rangeByteLength);
return true;
}
uint8_t PixelBuffer::item(size_t index) const
{
RELEASE_ASSERT_WITH_SECURITY_IMPLICATION(index < m_sizeInBytes);
return m_bytes[index];
}
void PixelBuffer::set(size_t index, double value)
{
RELEASE_ASSERT_WITH_SECURITY_IMPLICATION(index < m_sizeInBytes);
m_bytes[index] = JSC::Uint8ClampedAdaptor::toNativeFromDouble(value);
}
} // namespace WebCore
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