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>
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.
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.
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.
23 #ifndef SpotLightSource_h
24 #define SpotLightSource_h
26 #include "platform/graphics/filters/LightSource.h"
30 class PLATFORM_EXPORT SpotLightSource : public LightSource {
32 static PassRefPtr<SpotLightSource> create(const FloatPoint3D& position,
33 const FloatPoint3D& direction, float specularExponent, float limitingConeAngle)
35 return adoptRef(new SpotLightSource(position, direction, specularExponent, limitingConeAngle));
38 virtual PassRefPtr<LightSource> create(const FloatPoint3D& scale, const FloatSize& offset) const OVERRIDE
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));
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; }
50 virtual bool setPosition(const FloatPoint3D&) OVERRIDE;
51 virtual bool setPointsAt(const FloatPoint3D&) OVERRIDE;
53 virtual bool setSpecularExponent(float) OVERRIDE;
54 virtual bool setLimitingConeAngle(float) OVERRIDE;
56 virtual void initPaintingData(PaintingData&) const OVERRIDE;
57 virtual void updatePaintingData(PaintingData&, int x, int y, float z) const OVERRIDE;
59 virtual TextStream& externalRepresentation(TextStream&) const OVERRIDE;
62 SpotLightSource(const FloatPoint3D& position, const FloatPoint3D& direction,
63 float specularExponent, float limitingConeAngle)
64 : LightSource(LS_SPOT)
65 , m_position(position)
66 , m_direction(direction)
67 , m_specularExponent(std::min(std::max(specularExponent, 1.0f), 128.0f))
68 , m_limitingConeAngle(limitingConeAngle)
72 FloatPoint3D m_position;
73 FloatPoint3D m_direction;
75 float m_specularExponent;
76 float m_limitingConeAngle;
81 #endif // SpotLightSource_h