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      1 /*
      2  * Copyright (C) 2011 Apple Inc. All rights reserved.
      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 FilterOperations_h
     27 #define FilterOperations_h
     28 
     29 #include "core/platform/graphics/IntRectExtent.h"
     30 #include "core/platform/graphics/filters/FilterOperation.h"
     31 #include "wtf/RefPtr.h"
     32 #include "wtf/Vector.h"
     33 
     34 namespace WebCore {
     35 
     36 typedef IntRectExtent FilterOutsets;
     37 
     38 class FilterOperations {
     39     WTF_MAKE_FAST_ALLOCATED;
     40 public:
     41     FilterOperations();
     42     FilterOperations(const FilterOperations& other) { *this = other; }
     43 
     44     FilterOperations& operator=(const FilterOperations&);
     45 
     46     bool operator==(const FilterOperations&) const;
     47     bool operator!=(const FilterOperations& o) const
     48     {
     49         return !(*this == o);
     50     }
     51 
     52     void clear()
     53     {
     54         m_operations.clear();
     55     }
     56 
     57     Vector<RefPtr<FilterOperation> >& operations() { return m_operations; }
     58     const Vector<RefPtr<FilterOperation> >& operations() const { return m_operations; }
     59 
     60     bool isEmpty() const { return !m_operations.size(); }
     61     size_t size() const { return m_operations.size(); }
     62     const FilterOperation* at(size_t index) const { return index < m_operations.size() ? m_operations.at(index).get() : 0; }
     63 
     64     bool operationsMatch(const FilterOperations&) const;
     65 
     66     bool hasOutsets() const;
     67     FilterOutsets outsets() const;
     68 
     69     bool hasFilterThatAffectsOpacity() const;
     70     bool hasFilterThatMovesPixels() const;
     71 
     72     bool hasCustomFilter() const;
     73     bool hasReferenceFilter() const;
     74 private:
     75     Vector<RefPtr<FilterOperation> > m_operations;
     76 };
     77 
     78 } // namespace WebCore
     79 
     80 
     81 #endif // FilterOperations_h
     82