1 /*
2  * Copyright (C) 2004, 2005, 2006, 2007 Nikolas Zimmermann <zimmermann@kde.org>
3  * Copyright (C) 2004, 2005 Rob Buis <buis@kde.org>
4  * Copyright (C) 2005 Eric Seidel <eric@webkit.org>
5  *
6  * This library is free software; you can redistribute it and/or
7  * modify it under the terms of the GNU Library General Public
8  * License as published by the Free Software Foundation; either
9  * version 2 of the License, or (at your option) any later version.
10  *
11  * This library is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
14  * Library General Public License for more details.
15  *
16  * You should have received a copy of the GNU Library General Public License
17  * along with this library; see the file COPYING.LIB.  If not, write to
18  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
19  * Boston, MA 02110-1301, USA.
20  */
21 
22 #ifndef FEComposite_h
23 #define FEComposite_h
24 
25 #if ENABLE(FILTERS)
26 #include "FilterEffect.h"
27 
28 #include "PlatformString.h"
29 #include "Filter.h"
30 
31 namespace WebCore {
32 
33 enum CompositeOperationType {
34     FECOMPOSITE_OPERATOR_UNKNOWN    = 0,
35     FECOMPOSITE_OPERATOR_OVER       = 1,
36     FECOMPOSITE_OPERATOR_IN         = 2,
37     FECOMPOSITE_OPERATOR_OUT        = 3,
38     FECOMPOSITE_OPERATOR_ATOP       = 4,
39     FECOMPOSITE_OPERATOR_XOR        = 5,
40     FECOMPOSITE_OPERATOR_ARITHMETIC = 6
41 };
42 
43 class FEComposite : public FilterEffect {
44 public:
45     static PassRefPtr<FEComposite> create(Filter*, const CompositeOperationType&, float, float, float, float);
46 
47     CompositeOperationType operation() const;
48     bool setOperation(CompositeOperationType);
49 
50     float k1() const;
51     bool setK1(float);
52 
53     float k2() const;
54     bool setK2(float);
55 
56     float k3() const;
57     bool setK3(float);
58 
59     float k4() const;
60     bool setK4(float);
61 
62     virtual void apply();
63     virtual void dump();
64 
65     virtual void determineAbsolutePaintRect();
66 
67     virtual TextStream& externalRepresentation(TextStream&, int indention) const;
68 
69 private:
70     FEComposite(Filter*, const CompositeOperationType&, float, float, float, float);
71 
72     CompositeOperationType m_type;
73     float m_k1;
74     float m_k2;
75     float m_k3;
76     float m_k4;
77 };
78 
79 } // namespace WebCore
80 
81 #endif // ENABLE(FILTERS)
82 
83 #endif // FEComposite_h
84