Source/WebCore/platform/graphics/cg/ImageBufferCGBitmapBackend.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
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 * 2. Redistributions in binary form must reproduce the above copyright
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 *    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
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#pragma once

#if USE(CG)

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

namespace WebCore {

class ImageBufferCGBitmapBackend final : public ImageBufferCGBackend {
    WTF_MAKE_ISO_ALLOCATED(ImageBufferCGBitmapBackend);
    WTF_MAKE_NONCOPYABLE(ImageBufferCGBitmapBackend);
public:
    ~ImageBufferCGBitmapBackend();

    static IntSize calculateSafeBackendSize(const Parameters&);
    static size_t calculateMemoryCost(const Parameters&);

    static std::unique_ptr<ImageBufferCGBitmapBackend> create(const Parameters&, const ImageBuffer::CreationContext&);

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

    GraphicsContext& context() const final;

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

    IntSize backendSize() const final;
    unsigned bytesPerRow() const final;

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

    RefPtr<PixelBuffer> getPixelBuffer(const PixelBufferFormat& outputFormat, const IntRect&, const ImageBufferAllocator&) const final;
    void putPixelBuffer(const PixelBuffer&, const IntRect& srcRect, const IntPoint& destPoint, AlphaPremultiplication destFormat) final;

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

} // namespace WebCore

#endif // USE(CG)