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 * Copyright (C) 2013 Google Inc. All rights reserved.
6 *
7 * This library is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Library General Public
9 * License as published by the Free Software Foundation; either
10 * version 2 of the License, or (at your option) any later version.
11 *
12 * This library is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
15 * Library General Public License for more details.
16 *
17 * You should have received a copy of the GNU Library General Public License
18 * along with this library; see the file COPYING.LIB.  If not, write to
19 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
20 * Boston, MA 02110-1301, USA.
21 */
22
23#ifndef FEBlend_h
24#define FEBlend_h
25
26#include "platform/graphics/filters/Filter.h"
27#include "platform/graphics/filters/FilterEffect.h"
28
29namespace WebCore {
30
31enum BlendModeType {
32    FEBLEND_MODE_UNKNOWN = 0,
33    FEBLEND_MODE_NORMAL = 1,
34    FEBLEND_MODE_MULTIPLY = 2,
35    FEBLEND_MODE_SCREEN = 3,
36    FEBLEND_MODE_DARKEN = 4,
37    FEBLEND_MODE_LIGHTEN = 5
38};
39
40class PLATFORM_EXPORT FEBlend : public FilterEffect {
41public:
42    static PassRefPtr<FEBlend> create(Filter*, BlendModeType);
43
44    BlendModeType blendMode() const;
45    bool setBlendMode(BlendModeType);
46
47    void platformApplyGeneric(unsigned char* srcPixelArrayA, unsigned char* srcPixelArrayB, unsigned char* dstPixelArray,
48                           unsigned colorArrayLength);
49    void platformApplyNEON(unsigned char* srcPixelArrayA, unsigned char* srcPixelArrayB, unsigned char* dstPixelArray,
50                           unsigned colorArrayLength);
51    virtual PassRefPtr<SkImageFilter> createImageFilter(SkiaImageFilterBuilder*) OVERRIDE;
52
53    virtual TextStream& externalRepresentation(TextStream&, int indention) const OVERRIDE;
54
55private:
56    FEBlend(Filter*, BlendModeType);
57
58    virtual void applySoftware() OVERRIDE;
59
60    BlendModeType m_mode;
61};
62
63} // namespace WebCore
64
65#endif // FEBlend_h
66