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      1 /*
      2  * Copyright (C) 2006 Nikolas Zimmermann <zimmermann (at) kde.org>
      3  *
      4  * Redistribution and use in source and binary forms, with or without
      5  * modification, are permitted provided that the following conditions
      6  * are met:
      7  * 1. Redistributions of source code must retain the above copyright
      8  *    notice, this list of conditions and the following disclaimer.
      9  * 2. Redistributions in binary form must reproduce the above copyright
     10  *    notice, this list of conditions and the following disclaimer in the
     11  *    documentation and/or other materials provided with the distribution.
     12  *
     13  * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
     14  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     15  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     16  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
     17  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
     18  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
     19  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
     20  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
     21  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     22  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     23  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     24  */
     25 
     26 #ifndef SVGResourceClipper_h
     27 #define SVGResourceClipper_h
     28 
     29 #if ENABLE(SVG)
     30 #include "FloatRect.h"
     31 #include "Path.h"
     32 #include "RenderObject.h"
     33 #include "SVGResource.h"
     34 
     35 namespace WebCore {
     36 
     37     struct ClipData {
     38         Path path;
     39         WindRule windRule;
     40         bool bboxUnits : 1;
     41     };
     42 
     43     class ClipDataList {
     44     public:
     45         void addPath(const Path& pathData, WindRule windRule, bool bboxUnits)
     46         {
     47             ClipData clipData;
     48 
     49             clipData.path = pathData;
     50             clipData.windRule = windRule;
     51             clipData.bboxUnits = bboxUnits;
     52 
     53             m_clipData.append(clipData);
     54         }
     55 
     56         void clear() { m_clipData.clear(); }
     57         const Vector<ClipData>& clipData() const { return m_clipData; }
     58         bool isEmpty() const { return m_clipData.isEmpty(); }
     59     private:
     60         Vector<ClipData> m_clipData;
     61     };
     62 
     63     class GraphicsContext;
     64 
     65     class SVGResourceClipper : public SVGResource {
     66     public:
     67         static PassRefPtr<SVGResourceClipper> create() { return adoptRef(new SVGResourceClipper); }
     68         virtual ~SVGResourceClipper();
     69 
     70         virtual void invalidate();
     71 
     72         void resetClipData();
     73         void addClipData(const Path&, WindRule, bool bboxUnits);
     74 
     75         const ClipDataList& clipData() const;
     76 
     77         virtual SVGResourceType resourceType() const { return ClipperResourceType; }
     78         virtual TextStream& externalRepresentation(TextStream&) const;
     79 
     80         // To be implemented by the specific rendering devices
     81         void applyClip(GraphicsContext*, const FloatRect& boundingBox) const;
     82         FloatRect clipperBoundingBox(const FloatRect& oob);
     83     private:
     84         SVGResourceClipper();
     85         ClipDataList m_clipData;
     86         FloatRect m_clipperBoundingBox;
     87     };
     88 
     89     TextStream& operator<<(TextStream&, WindRule);
     90     TextStream& operator<<(TextStream&, const ClipData&);
     91 
     92     SVGResourceClipper* getClipperById(Document*, const AtomicString&, const RenderObject*);
     93 
     94 } // namespace WebCore
     95 
     96 #endif
     97 
     98 #endif // SVGResourceClipper_h
     99