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