Source/WebCore/platform/graphics/filters/FilterEffectRenderer.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
* 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 "FilterEffect.h"
#include "ImageBuffer.h"
#include "Settings.h"

namespace WebCore {

class FilterEffectRenderer {
    WTF_MAKE_FAST_ALLOCATED;
    
public:
    static std::unique_ptr<FilterEffectRenderer> tryCreate(bool, FilterEffect&);
    virtual void applyEffects(const Filter&, FilterEffect&) = 0;
    virtual bool hasResult() const = 0;
    virtual ImageBuffer* output() const = 0;
    virtual FloatRect destRect(const FilterEffect&) const = 0;
    virtual void clearResult() = 0;
    
    virtual ~FilterEffectRenderer() = default;
    
protected:
    FilterEffectRenderer() = default;
    virtual void renderToImageBuffer(FilterEffect&) = 0;
};

} // namespace WebCore