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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/StdLibExtras.h>
#include <wtf/text/TextStream.h>
namespace WebCore {
bool PixelBuffer::supportedPixelFormat(PixelFormat pixelFormat)
{
switch (pixelFormat) {
case PixelFormat::RGBA8:
case PixelFormat::BGRA8:
#if ENABLE(PIXEL_FORMAT_RGBA16F)
case PixelFormat::RGBA16F:
#endif
return true;
case PixelFormat::BGRX8:
#if ENABLE(PIXEL_FORMAT_RGB10)
case PixelFormat::RGB10:
#endif
#if ENABLE(PIXEL_FORMAT_RGB10A8)
case PixelFormat::RGB10A8:
#endif
return false;
}
ASSERT_NOT_REACHED();
return false;
}
static CheckedUint32 mustFitInInt32(CheckedUint32 uint32)
{
if (!uint32.hasOverflowed() && !isInBounds<int32_t>(uint32.value()))
uint32.overflowed();
return uint32;
}
static CheckedUint32 computeRawPixelCount(const IntSize& size)
{
return CheckedUint32 { size.width() } * size.height();
}
static CheckedUint32 computeRawPixelComponentCount(PixelFormat pixelFormat, const IntSize& size)
{
ASSERT_UNUSED(pixelFormat, PixelBuffer::supportedPixelFormat(pixelFormat));
constexpr unsigned componentsPerPixel = 4;
return computeRawPixelCount(size) * componentsPerPixel;
}
CheckedUint32 PixelBuffer::computePixelCount(const IntSize& size)
{
return mustFitInInt32(computeRawPixelCount(size));
}
CheckedUint32 PixelBuffer::computePixelComponentCount(PixelFormat pixelFormat, const IntSize& size)
{
return mustFitInInt32(computeRawPixelComponentCount(pixelFormat, size));
}
CheckedUint32 PixelBuffer::computeBufferSize(PixelFormat pixelFormat, const IntSize& size)
{
// FIXME: Implement a better way to deal with sizes of diffferent formats.
unsigned bytesPerPixelComponent =
#if ENABLE(PIXEL_FORMAT_RGBA16F)
(pixelFormat == PixelFormat::RGBA16F) ? 2 :
#endif
1;
return mustFitInInt32(computeRawPixelComponentCount(pixelFormat, size) * bytesPerPixelComponent);
}
PixelBuffer::PixelBuffer(const PixelBufferFormat& format, const IntSize& size, std::span<uint8_t> bytes)
: m_format(format)
, m_size(size)
, m_bytes(bytes)
{
RELEASE_ASSERT_WITH_SECURITY_IMPLICATION((m_size.area() * 4) <= m_bytes.size());
}
PixelBuffer::~PixelBuffer() = default;
bool PixelBuffer::setRange(std::span<const uint8_t> data, size_t byteOffset)
{
if (!isSumSmallerThanOrEqual(byteOffset, data.size(), m_bytes.size()))
return false;
memmoveSpan(m_bytes.subspan(byteOffset), data);
return true;
}
bool PixelBuffer::zeroRange(size_t byteOffset, size_t rangeByteLength)
{
if (!isSumSmallerThanOrEqual(byteOffset, rangeByteLength, m_bytes.size()))
return false;
zeroSpan(m_bytes.subspan(byteOffset, rangeByteLength));
return true;
}
uint8_t PixelBuffer::item(size_t index) const
{
RELEASE_ASSERT_WITH_SECURITY_IMPLICATION(index < m_bytes.size());
return m_bytes[index];
}
void PixelBuffer::set(size_t index, double value)
{
RELEASE_ASSERT_WITH_SECURITY_IMPLICATION(index < m_bytes.size());
m_bytes[index] = JSC::Uint8ClampedAdaptor::toNativeFromDouble(value);
}
} // namespace WebCore
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