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 FEDisplacementMap_h
23#define FEDisplacementMap_h
24
25#if ENABLE(FILTERS)
26#include "FilterEffect.h"
27#include "Filter.h"
28#include <wtf/text/WTFString.h>
29
30namespace WebCore {
31
32enum ChannelSelectorType {
33    CHANNEL_UNKNOWN = 0,
34    CHANNEL_R = 1,
35    CHANNEL_G = 2,
36    CHANNEL_B = 3,
37    CHANNEL_A = 4
38};
39
40class FEDisplacementMap : public FilterEffect {
41public:
42    static PassRefPtr<FEDisplacementMap> create(Filter*, ChannelSelectorType xChannelSelector, ChannelSelectorType yChannelSelector, float);
43
44    ChannelSelectorType xChannelSelector() const;
45    bool setXChannelSelector(const ChannelSelectorType);
46
47    ChannelSelectorType yChannelSelector() const;
48    bool setYChannelSelector(const ChannelSelectorType);
49
50    float scale() const;
51    bool setScale(float);
52
53    void setResultColorSpace(ColorSpace) OVERRIDE;
54    virtual void transformResultColorSpace(FilterEffect*, const int) OVERRIDE;
55
56    virtual void platformApplySoftware();
57    virtual void dump();
58
59    virtual void determineAbsolutePaintRect() { setAbsolutePaintRect(enclosingIntRect(maxEffectRect())); }
60
61    virtual TextStream& externalRepresentation(TextStream&, int indention) const;
62
63private:
64    FEDisplacementMap(Filter*, ChannelSelectorType xChannelSelector, ChannelSelectorType yChannelSelector, float);
65
66    ChannelSelectorType m_xChannelSelector;
67    ChannelSelectorType m_yChannelSelector;
68    float m_scale;
69};
70
71} // namespace WebCore
72
73#endif // ENABLE(FILTERS)
74
75#endif // FEDisplacementMap_h
76