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