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      1 /*
      2  * Copyright (C) 2011 Apple Inc.
      3  * Copyright (C) 2010 Sencha, Inc.
      4  * Copyright (C) 2010 Igalia S.L.
      5  * All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  *
     16  * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
     17  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     19  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
     20  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
     21  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
     22  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
     23  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
     24  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     26  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     27  */
     28 
     29 #ifndef ShadowBlur_h
     30 #define ShadowBlur_h
     31 
     32 #include "core/platform/graphics/Color.h"
     33 #include "core/platform/graphics/FloatSize.h"
     34 
     35 #include "wtf/Noncopyable.h"
     36 
     37 namespace WebCore {
     38 
     39 class ShadowBlur {
     40     WTF_MAKE_NONCOPYABLE(ShadowBlur);
     41 public:
     42     enum ShadowType {
     43         NoShadow,
     44         SolidShadow,
     45         BlurShadow
     46     };
     47 
     48     ShadowBlur(const FloatSize& radius, const FloatSize& offset, const Color&);
     49 
     50     void blurLayerImage(unsigned char*, const IntSize&, int stride);
     51 
     52 private:
     53     void updateShadowBlurValues();
     54 
     55     ShadowType m_type;
     56 
     57     Color m_color;
     58     FloatSize m_blurRadius;
     59     FloatSize m_offset;
     60 
     61     bool m_shadowsIgnoreTransforms;
     62 };
     63 
     64 } // namespace WebCore
     65 
     66 #endif // ShadowBlur_h
     67