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

/*
 * Copyright (C) 2020 Apple Inc.  All rights reserved.
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 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
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 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
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#pragma once

#if USE(CG)

#include "ImageBufferCGBackend.h"
#include <wtf/IsoMalloc.h>

namespace WebCore {

class ImageBufferCGBitmapBackend : public ImageBufferCGBackend {
    WTF_MAKE_ISO_ALLOCATED(ImageBufferCGBitmapBackend);
    WTF_MAKE_NONCOPYABLE(ImageBufferCGBitmapBackend);
public:
    WEBCORE_EXPORT static IntSize calculateSafeBackendSize(const Parameters&);
    WEBCORE_EXPORT static size_t calculateMemoryCost(const Parameters&);

    WEBCORE_EXPORT static std::unique_ptr<ImageBufferCGBitmapBackend> create(const Parameters&, const HostWindow*);

    // FIXME: Rename to createUsingColorSpaceOfGraphicsContext() (or something like that).
    WEBCORE_EXPORT static std::unique_ptr<ImageBufferCGBitmapBackend> create(const Parameters&, const GraphicsContext&);

    GraphicsContext& context() const override;

    IntSize backendSize() const override;

    RefPtr<NativeImage> copyNativeImage(BackingStoreCopy = CopyBackingStore) const override;

    std::optional<PixelBuffer> getPixelBuffer(const PixelBufferFormat& outputFormat, const IntRect&) const override;
    void putPixelBuffer(const PixelBuffer&, const IntRect& srcRect, const IntPoint& destPoint, AlphaPremultiplication destFormat) override;

private:
    ImageBufferCGBitmapBackend(const Parameters&, void* data, RetainPtr<CGDataProviderRef>&&, std::unique_ptr<GraphicsContext>&&);

    unsigned bytesPerRow() const override;

    void* m_data;
    RetainPtr<CGDataProviderRef> m_dataProvider;
    std::unique_ptr<GraphicsContext> m_context;
};

} // namespace WebCore

#endif // USE(CG)