Source/core/platform/graphics/ShadowBlur.h

/*
 * Copyright (C) 2011 Apple Inc.
 * Copyright (C) 2010 Sencha, Inc.
 * Copyright (C) 2010 Igalia S.L.
 * 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 COMPUTER, 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.
 */

#ifndef ShadowBlur_h
#define ShadowBlur_h

#include "core/platform/graphics/Color.h"
#include "platform/geometry/FloatSize.h"

#include "wtf/Noncopyable.h"

namespace WebCore {

class ShadowBlur {
    WTF_MAKE_NONCOPYABLE(ShadowBlur);
public:
    enum ShadowType {
        NoShadow,
        SolidShadow,
        BlurShadow
    };

    ShadowBlur(const FloatSize& radius, const FloatSize& offset, const Color&);

    void blurLayerImage(unsigned char*, const IntSize&, int stride);

private:
    void updateShadowBlurValues();

    ShadowType m_type;

    Color m_color;
    FloatSize m_blurRadius;
    FloatSize m_offset;

    bool m_shadowsIgnoreTransforms;
};

} // namespace WebCore

#endif // ShadowBlur_h