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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 "PixelBufferFormat.h"
#include <span>
namespace WebCore {
class IntSize;
struct PixelBufferConversionView {
PixelBufferFormat format;
unsigned bytesPerRow;
std::span<uint8_t> rows;
};
struct ConstPixelBufferConversionView {
PixelBufferFormat format;
unsigned bytesPerRow;
std::span<const uint8_t> rows;
};
WEBCORE_EXPORT void convertImagePixels(const ConstPixelBufferConversionView& source, const PixelBufferConversionView& destination, const IntSize&);
WEBCORE_EXPORT void copyRowsInternal(unsigned sourceBytesPerRow, std::span<const uint8_t> source, unsigned destinationBytesPerRow, std::span<uint8_t> destination, unsigned rows, unsigned copyBytesPerRow);
inline void copyRows(unsigned sourceBytesPerRow, std::span<const uint8_t> source, unsigned destinationBytesPerRow, std::span<uint8_t> destination, unsigned rows, unsigned copyBytesPerRow)
{
if (!rows || !copyBytesPerRow)
return;
unsigned requiredSourceBytes = sourceBytesPerRow * (rows - 1) + copyBytesPerRow;
if (source.size() < requiredSourceBytes) {
ASSERT_NOT_REACHED();
return;
}
unsigned requiredDestinationBytes = destinationBytesPerRow * (rows - 1) + copyBytesPerRow;
if (destination.size() < requiredDestinationBytes) {
ASSERT_NOT_REACHED();
return;
}
if (rows > 1 && (sourceBytesPerRow < copyBytesPerRow || destinationBytesPerRow < copyBytesPerRow)) {
ASSERT_NOT_REACHED();
return;
}
copyRowsInternal(sourceBytesPerRow, source, destinationBytesPerRow, destination, rows, copyBytesPerRow);
}
}
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