| /* |
| * 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() << ")"; |
| } |
| |
| } |