1/*
2 * Copyright (C) 2008 Alex Mathews <possessedpenguinbob@gmail.com>
3 * Copyright (C) 2004, 2005, 2006, 2007 Nikolas Zimmermann <zimmermann@kde.org>
4 * Copyright (C) 2004, 2005 Rob Buis <buis@kde.org>
5 * Copyright (C) 2005 Eric Seidel <eric@webkit.org>
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 SpotLightSource_h
24#define SpotLightSource_h
25
26#include "platform/graphics/filters/LightSource.h"
27
28namespace WebCore {
29
30class PLATFORM_EXPORT SpotLightSource : public LightSource {
31public:
32    static PassRefPtr<SpotLightSource> create(const FloatPoint3D& position,
33        const FloatPoint3D& direction, float specularExponent, float limitingConeAngle)
34    {
35        return adoptRef(new SpotLightSource(position, direction, specularExponent, limitingConeAngle));
36    }
37
38    virtual PassRefPtr<LightSource> create(const FloatPoint3D& scale, const FloatSize& offset) const OVERRIDE
39    {
40        FloatPoint3D position(m_position.x() * scale.x() - offset.width(), m_position.y() * scale.y() - offset.height(), m_position.z() * scale.z());
41        FloatPoint3D direction(m_direction.x() * scale.x() - offset.width(), m_direction.y() * scale.y() - offset.height(), m_direction.z() * scale.z());
42        return adoptRef(new SpotLightSource(position, direction, m_specularExponent, m_limitingConeAngle));
43    }
44
45    const FloatPoint3D& position() const { return m_position; }
46    const FloatPoint3D& direction() const { return m_direction; }
47    float specularExponent() const { return m_specularExponent; }
48    float limitingConeAngle() const { return m_limitingConeAngle; }
49
50    virtual bool setX(float) OVERRIDE;
51    virtual bool setY(float) OVERRIDE;
52    virtual bool setZ(float) OVERRIDE;
53    virtual bool setPointsAtX(float) OVERRIDE;
54    virtual bool setPointsAtY(float) OVERRIDE;
55    virtual bool setPointsAtZ(float) OVERRIDE;
56
57    virtual bool setSpecularExponent(float) OVERRIDE;
58    virtual bool setLimitingConeAngle(float) OVERRIDE;
59
60    virtual void initPaintingData(PaintingData&) const OVERRIDE;
61    virtual void updatePaintingData(PaintingData&, int x, int y, float z) const OVERRIDE;
62
63    virtual TextStream& externalRepresentation(TextStream&) const OVERRIDE;
64
65private:
66    SpotLightSource(const FloatPoint3D& position, const FloatPoint3D& direction,
67        float specularExponent, float limitingConeAngle)
68        : LightSource(LS_SPOT)
69        , m_position(position)
70        , m_direction(direction)
71        , m_specularExponent(std::min(std::max(specularExponent, 1.0f), 128.0f))
72        , m_limitingConeAngle(limitingConeAngle)
73    {
74    }
75
76    FloatPoint3D m_position;
77    FloatPoint3D m_direction;
78
79    float m_specularExponent;
80    float m_limitingConeAngle;
81};
82
83} // namespace WebCore
84
85#endif // SpotLightSource_h
86