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/*
* Copyright (C) 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. ``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
* 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.
*/
#pragma once
#include "PixelBuffer.h"
#include <JavaScriptCore/Uint8ClampedArray.h>
namespace WebCore {
class ByteArrayPixelBuffer : public PixelBuffer {
public:
WEBCORE_EXPORT static Ref<ByteArrayPixelBuffer> create(const PixelBufferFormat&, const IntSize&, JSC::Uint8ClampedArray&);
WEBCORE_EXPORT static RefPtr<ByteArrayPixelBuffer> tryCreate(const PixelBufferFormat&, const IntSize&);
WEBCORE_EXPORT static RefPtr<ByteArrayPixelBuffer> tryCreate(const PixelBufferFormat&, const IntSize&, Ref<JSC::ArrayBuffer>&&);
JSC::Uint8ClampedArray& data() const { return m_data.get(); }
Ref<JSC::Uint8ClampedArray>&& takeData() { return WTFMove(m_data); }
RefPtr<PixelBuffer> createScratchPixelBuffer(const IntSize&) const override;
template<class Encoder> void encode(Encoder&) const;
template<class Decoder> static std::optional<Ref<ByteArrayPixelBuffer>> decode(Decoder&);
private:
WEBCORE_EXPORT static RefPtr<ByteArrayPixelBuffer> tryCreate(const PixelBufferFormat&, const IntSize&, unsigned dataByteLength);
ByteArrayPixelBuffer(const PixelBufferFormat&, const IntSize&, Ref<JSC::Uint8ClampedArray>&&);
bool isByteArrayPixelBuffer() const override { return true; }
Ref<JSC::Uint8ClampedArray> m_data;
};
template<class Encoder> void ByteArrayPixelBuffer::encode(Encoder& encoder) const
{
ASSERT(m_data->byteLength() == (m_size.area() * 4));
encoder << m_format;
encoder << m_size;
encoder.encodeFixedLengthData(m_data->data(), m_data->byteLength(), 1);
}
template<class Decoder> std::optional<Ref<ByteArrayPixelBuffer>> ByteArrayPixelBuffer::decode(Decoder& decoder)
{
std::optional<PixelBufferFormat> format;
decoder >> format;
if (!format)
return std::nullopt;
// FIXME: Support non-8 bit formats.
if (!(format->pixelFormat == PixelFormat::RGBA8 || format->pixelFormat == PixelFormat::BGRA8))
return std::nullopt;
std::optional<IntSize> size;
decoder >> size;
if (!size)
return std::nullopt;
auto computedBufferSize = PixelBuffer::computeBufferSize(*format, *size);
if (computedBufferSize.hasOverflowed())
return std::nullopt;
auto bufferSize = computedBufferSize;
if (!decoder.template bufferIsLargeEnoughToContain<uint8_t>(bufferSize))
return std::nullopt;
auto result = ByteArrayPixelBuffer::tryCreate(WTFMove(*format), *size, bufferSize);
if (!result)
return std::nullopt;
if (!decoder.decodeFixedLengthData(result->m_data->data(), result->m_data->byteLength(), 1))
return std::nullopt;
return result.releaseNonNull();
}
} // namespace WebCore
SPECIALIZE_TYPE_TRAITS_BEGIN(WebCore::ByteArrayPixelBuffer)
static bool isType(const WebCore::PixelBuffer& pixelBuffer) { return pixelBuffer.isByteArrayPixelBuffer(); }
SPECIALIZE_TYPE_TRAITS_END()
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