third_party/WebKit/Source/platform/graphics/CompositorFilterOperations.h

// Copyright 2016 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef CompositorFilterOperations_h
#define CompositorFilterOperations_h

#include "cc/output/filter_operations.h"
#include "platform/PlatformExport.h"
#include "platform/geometry/IntPoint.h"
#include "platform/graphics/Color.h"
#include "third_party/skia/include/core/SkScalar.h"
#include "wtf/Noncopyable.h"
#include "wtf/PtrUtil.h"
#include <memory>

class SkImageFilter;

namespace blink {

// An ordered list of filter operations.
class PLATFORM_EXPORT CompositorFilterOperations {
    WTF_MAKE_NONCOPYABLE(CompositorFilterOperations);
public:
    static std::unique_ptr<CompositorFilterOperations> create()
    {
        return wrapUnique(new CompositorFilterOperations());
    }

    const cc::FilterOperations& asFilterOperations() const;

    void appendGrayscaleFilter(float amount);
    void appendSepiaFilter(float amount);
    void appendSaturateFilter(float amount);
    void appendHueRotateFilter(float amount);
    void appendInvertFilter(float amount);
    void appendBrightnessFilter(float amount);
    void appendContrastFilter(float amount);
    void appendOpacityFilter(float amount);
    void appendBlurFilter(float amount);
    void appendDropShadowFilter(IntPoint offset, float stdDeviation, Color);
    void appendColorMatrixFilter(SkScalar matrix[20]);
    void appendZoomFilter(float amount, int inset);
    void appendSaturatingBrightnessFilter(float amount);

    void appendReferenceFilter(sk_sp<SkImageFilter>);

    void clear();
    bool isEmpty() const;

private:
    CompositorFilterOperations();

    cc::FilterOperations m_filterOperations;
};

} // namespace blink

#endif // CompositorFilterOperations_h