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#if ENABLE(CSS_FILTERS)
30
31#include "FilterOperation.h"
32#include "IntRectExtent.h"
33#include <wtf/RefPtr.h>
34#include <wtf/Vector.h>
35
36namespace WebCore {
37
38typedef IntRectExtent FilterOutsets;
39
40class FilterOperations {
41    WTF_MAKE_FAST_ALLOCATED;
42public:
43    FilterOperations();
44    FilterOperations(const FilterOperations& other) { *this = other; }
45
46    FilterOperations& operator=(const FilterOperations&);
47
48    bool operator==(const FilterOperations&) const;
49    bool operator!=(const FilterOperations& o) const
50    {
51        return !(*this == o);
52    }
53
54    void clear()
55    {
56        m_operations.clear();
57    }
58
59    Vector<RefPtr<FilterOperation> >& operations() { return m_operations; }
60    const Vector<RefPtr<FilterOperation> >& operations() const { return m_operations; }
61
62    bool isEmpty() const { return !m_operations.size(); }
63    size_t size() const { return m_operations.size(); }
64    const FilterOperation* at(size_t index) const { return index < m_operations.size() ? m_operations.at(index).get() : 0; }
65
66    bool operationsMatch(const FilterOperations&) const;
67
68    bool hasOutsets() const;
69    FilterOutsets outsets() const;
70
71    bool hasFilterThatAffectsOpacity() const;
72    bool hasFilterThatMovesPixels() const;
73
74#if ENABLE(CSS_SHADERS)
75    bool hasCustomFilter() const;
76#endif
77    bool hasReferenceFilter() const;
78private:
79    Vector<RefPtr<FilterOperation> > m_operations;
80};
81
82} // namespace WebCore
83
84#endif // ENABLE(CSS_FILTERS)
85
86#endif // FilterOperations_h
87