| /* |
| * 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; |
| } |
| |
| } |