Source/WebCore/platform/graphics/DecomposedGlyphs.h

/*
 * Copyright (C) 2022 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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#pragma once

#include "FloatRect.h"
#include "PositionedGlyphs.h"
#include "RenderingResourceIdentifier.h"
#include <wtf/HashSet.h>
#include <wtf/ThreadSafeRefCounted.h>

namespace WebCore {

class Font;

class DecomposedGlyphs : public ThreadSafeRefCounted<DecomposedGlyphs, WTF::DestructionThread::Main>, public CanMakeWeakPtr<DecomposedGlyphs> {
    WTF_MAKE_FAST_ALLOCATED;
public:
    class Observer {
    public:
        virtual ~Observer() = default;
        virtual void releaseDecomposedGlyphs(RenderingResourceIdentifier) = 0;
    protected:
        Observer() = default;
    };

    static WEBCORE_EXPORT Ref<DecomposedGlyphs> create(const Font&, const GlyphBufferGlyph*, const GlyphBufferAdvance*, unsigned count, const FloatPoint& localAnchor, FontSmoothingMode, RenderingResourceIdentifier = RenderingResourceIdentifier::generate());
    static WEBCORE_EXPORT Ref<DecomposedGlyphs> create(PositionedGlyphs&&, const FloatRect& bounds, RenderingResourceIdentifier);
    WEBCORE_EXPORT ~DecomposedGlyphs();

    const PositionedGlyphs& positionedGlyphs() const { return m_positionedGlyphs; }
    const FloatRect& bounds() const { return m_bounds; }

    void addObserver(Observer& observer) { m_observers.add(&observer); }
    void removeObserver(Observer& observer) { m_observers.remove(&observer); }

    RenderingResourceIdentifier renderingResourceIdentifier() const { return m_renderingResourceIdentifier; }

private:
    DecomposedGlyphs(const Font&, const GlyphBufferGlyph*, const GlyphBufferAdvance*, unsigned count, const FloatPoint& localAnchor, FontSmoothingMode, RenderingResourceIdentifier);
    DecomposedGlyphs(PositionedGlyphs&&, const FloatRect& bounds, RenderingResourceIdentifier);

    PositionedGlyphs m_positionedGlyphs;
    FloatRect m_bounds;
    HashSet<Observer*> m_observers;
    RenderingResourceIdentifier m_renderingResourceIdentifier;
};

} // namespace WebCore