Source/WebCore/platform/graphics/cg/ImageBufferCGBackend.h

/*
 * 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. ``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
 * 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
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 */

#pragma once

#if USE(CG)

#include "ImageBufferBackend.h"

namespace WebCore {

class WEBCORE_EXPORT ImageBufferCGBackend : public ImageBufferBackend {
public:
    RefPtr<Image> copyImage(BackingStoreCopy = CopyBackingStore, PreserveResolution = PreserveResolution::No) const override;
    RefPtr<Image> sinkIntoImage(PreserveResolution) override;

    void draw(GraphicsContext&, const FloatRect& destRect, const FloatRect& srcRect, const ImagePaintingOptions&) override;
    void drawPattern(GraphicsContext&, const FloatRect& destRect, const FloatRect& srcRect, const AffineTransform& patternTransform, const FloatPoint& phase, const FloatSize& spacing, const ImagePaintingOptions&) override;

    AffineTransform baseTransform() const override;

    String toDataURL(const String& mimeType, Optional<double> quality, PreserveResolution) const override;
    Vector<uint8_t> toData(const String& mimeType, Optional<double> quality) const override;

protected:
    using ImageBufferBackend::ImageBufferBackend;

    static RetainPtr<CGColorSpaceRef> contextColorSpace(const GraphicsContext&);
    void setupContext();
    virtual RetainPtr<CFDataRef> toCFData(const String& mimeType, Optional<double> quality, PreserveResolution) const;

#if USE(ACCELERATE)
    void copyImagePixels(
        AlphaPremultiplication srcAlphaFormat, ColorFormat srcColorFormat, unsigned srcBytesPerRow, uint8_t* srcRows,
        AlphaPremultiplication destAlphaFormat, ColorFormat destColorFormat, unsigned destBytesPerRow, uint8_t* destRows, const IntSize&) const override;
#endif
};

} // namespace WebCore

#endif // USE(CG)