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/*
* Copyright (C) 2023 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 "RenderingResourceIdentifier.h"
#include <wtf/HashSet.h>
#include <wtf/ThreadSafeWeakPtr.h>
namespace WebCore {
class RenderingResource
: public ThreadSafeRefCountedAndCanMakeThreadSafeWeakPtr<RenderingResource> {
public:
class Observer {
public:
virtual ~Observer() = default;
virtual void releaseRenderingResource(RenderingResourceIdentifier) = 0;
protected:
Observer() = default;
};
virtual ~RenderingResource()
{
if (!hasValidRenderingResourceIdentifier())
return;
for (auto observer : m_observers)
observer->releaseRenderingResource(renderingResourceIdentifier());
}
virtual bool isNativeImage() const { return false; }
virtual bool isGradient() const { return false; }
virtual bool isDecomposedGlyphs() const { return false; }
virtual bool isFilter() const { return false; }
bool hasValidRenderingResourceIdentifier() const
{
return m_renderingResourceIdentifier.has_value();
}
RenderingResourceIdentifier renderingResourceIdentifier() const
{
ASSERT(m_renderingResourceIdentifier);
return *m_renderingResourceIdentifier;
}
std::optional<RenderingResourceIdentifier> renderingResourceIdentifierIfExists() const
{
return m_renderingResourceIdentifier;
}
void addObserver(Observer& observer)
{
ASSERT(hasValidRenderingResourceIdentifier());
m_observers.add(&observer);
}
void removeObserver(Observer& observer)
{
ASSERT(hasValidRenderingResourceIdentifier());
m_observers.remove(&observer);
}
protected:
RenderingResource(std::optional<RenderingResourceIdentifier> renderingResourceIdentifier)
: m_renderingResourceIdentifier(renderingResourceIdentifier)
{
}
HashSet<Observer*> m_observers;
std::optional<RenderingResourceIdentifier> m_renderingResourceIdentifier;
};
} // namespace WebCore
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