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/*
* Copyright (C) 2021 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::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;
}
std::optional<PixelBuffer> PixelBuffer::tryCreateForDecoding(const PixelBufferFormat& format, const IntSize& size, unsigned dataByteLength)
{
ASSERT(supportedPixelFormat(format.pixelFormat));
ASSERT(computeBufferSize(format, size) == dataByteLength);
auto pixelArray = Uint8ClampedArray::tryCreateUninitialized(dataByteLength);
if (!pixelArray)
return std::nullopt;
return { { format, size, pixelArray.releaseNonNull() } };
}
std::optional<PixelBuffer> PixelBuffer::tryCreate(const PixelBufferFormat& format, const IntSize& size)
{
ASSERT(supportedPixelFormat(format.pixelFormat));
auto bufferSize = computeBufferSize(format, size);
if (bufferSize.hasOverflowed())
return std::nullopt;
if (bufferSize > std::numeric_limits<int32_t>::max())
return std::nullopt;
auto pixelArray = Uint8ClampedArray::tryCreateUninitialized(bufferSize);
if (!pixelArray)
return std::nullopt;
return { { format, size, pixelArray.releaseNonNull() } };
}
std::optional<PixelBuffer> PixelBuffer::tryCreate(const PixelBufferFormat& format, const IntSize& size, Ref<JSC::ArrayBuffer>&& arrayBuffer)
{
ASSERT(supportedPixelFormat(format.pixelFormat));
auto bufferSize = computeBufferSize(format, size);
if (bufferSize.hasOverflowed())
return std::nullopt;
if (bufferSize != arrayBuffer->byteLength())
return std::nullopt;
auto pixelArray = Uint8ClampedArray::tryCreate(WTFMove(arrayBuffer), 0, bufferSize);
if (!pixelArray)
return std::nullopt;
return { { format, size, pixelArray.releaseNonNull() } };
}
PixelBuffer::PixelBuffer(const PixelBufferFormat& format, const IntSize& size, Ref<JSC::Uint8ClampedArray>&& data)
: m_format { format }
, m_size { size }
, m_data { WTFMove(data) }
{
RELEASE_ASSERT_WITH_SECURITY_IMPLICATION((m_size.area() * 4) <= m_data->length());
}
PixelBuffer::PixelBuffer(const PixelBufferFormat& format, const IntSize& size, JSC::Uint8ClampedArray& data)
: m_format { format }
, m_size { size }
, m_data { data }
{
RELEASE_ASSERT_WITH_SECURITY_IMPLICATION((m_size.area() * 4) <= m_data->length());
}
PixelBuffer::~PixelBuffer() = default;
PixelBuffer PixelBuffer::deepClone() const
{
return { m_format, m_size, Uint8ClampedArray::create(m_data->data(), m_data->length()) };
}
TextStream& operator<<(TextStream& ts, const PixelBuffer& pixelBuffer)
{
return ts << &pixelBuffer.data() << "format ( " << pixelBuffer.format() << ")";
}
}
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