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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.
*/
#pragma once
#include "AlphaPremultiplication.h"
#include "DestinationColorSpace.h"
#include "IntSize.h"
#include "PixelBufferFormat.h"
#include "PixelFormat.h"
#include <JavaScriptCore/Uint8ClampedArray.h>
namespace WTF {
class TextStream;
}
namespace WebCore {
class PixelBuffer {
WTF_MAKE_NONCOPYABLE(PixelBuffer);
public:
static bool supportedPixelFormat(PixelFormat);
WEBCORE_EXPORT static std::optional<PixelBuffer> tryCreate(const PixelBufferFormat&, const IntSize&);
WEBCORE_EXPORT static std::optional<PixelBuffer> tryCreate(const PixelBufferFormat&, const IntSize&, Ref<JSC::ArrayBuffer>&&);
PixelBuffer(const PixelBufferFormat&, const IntSize&, Ref<JSC::Uint8ClampedArray>&&);
PixelBuffer(const PixelBufferFormat&, const IntSize&, JSC::Uint8ClampedArray&);
WEBCORE_EXPORT ~PixelBuffer();
PixelBuffer(PixelBuffer&&) = default;
PixelBuffer& operator=(PixelBuffer&&) = default;
const PixelBufferFormat& format() const { return m_format; }
const IntSize& size() const { return m_size; }
JSC::Uint8ClampedArray& data() const { return m_data.get(); }
Ref<JSC::Uint8ClampedArray>&& takeData() { return WTFMove(m_data); }
PixelBuffer deepClone() const;
template<class Encoder> void encode(Encoder&) const;
template<class Decoder> static std::optional<PixelBuffer> decode(Decoder&);
private:
WEBCORE_EXPORT static std::optional<PixelBuffer> tryCreateForDecoding(const PixelBufferFormat&, const IntSize&, unsigned dataByteLength);
WEBCORE_EXPORT static CheckedUint32 computeBufferSize(const PixelBufferFormat&, const IntSize&);
PixelBufferFormat m_format;
IntSize m_size;
Ref<JSC::Uint8ClampedArray> m_data;
};
WEBCORE_EXPORT WTF::TextStream& operator<<(WTF::TextStream&, const PixelBuffer&);
template<class Encoder> void PixelBuffer::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<PixelBuffer> PixelBuffer::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 = PixelBuffer::tryCreateForDecoding(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;
}
}
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