/* * Copyright (C) 2020 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 "ImageBuffer.h" #include <wtf/OptionSet.h> namespace WebCore { enum class SerializationState : uint8_t { OriginClean = 1 << 0, PremultiplyAlpha = 1 << 1, ForciblyPremultiplyAlpha = 1 << 2 }; class ImageBitmapBacking { public: ImageBitmapBacking(RefPtr<ImageBuffer>&&, OptionSet<SerializationState> = SerializationState::OriginClean); ImageBuffer* buffer() const; RefPtr<ImageBuffer> takeImageBuffer(); unsigned width() const; unsigned height() const; bool originClean() const { return m_serializationState.contains(SerializationState::OriginClean); } bool premultiplyAlpha() const { return m_serializationState.contains(SerializationState::PremultiplyAlpha); } // When WebGL consumes an Image coming from an ImageBitmap's ImageBuffer, it typically honors // the alpha mode of that native image - CGImageAlphaInfo in the Core Graphics backend. For // ImageBitmaps created from ImageBitmaps, this information is not accurate, and callers must be // told to ignore the alpha mode, and forcibly premultiply the alpha channel. bool forciblyPremultiplyAlpha() const { return m_serializationState.contains(SerializationState::ForciblyPremultiplyAlpha); } OptionSet<SerializationState> serializationState() const { return m_serializationState; } private: RefPtr<ImageBuffer> m_bitmapData; OptionSet<SerializationState> m_serializationState; }; } // namespace WebCore