1 /* 2 * Copyright (C) 2008 Alex Mathews <possessedpenguinbob (at) gmail.com> 3 * Copyright (C) 2004, 2005, 2006, 2007 Nikolas Zimmermann <zimmermann (at) kde.org> 4 * Copyright (C) 2004, 2005 Rob Buis <buis (at) kde.org> 5 * Copyright (C) 2005 Eric Seidel <eric (at) 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 28 namespace blink { 29 30 class PLATFORM_EXPORT SpotLightSource : public LightSource { 31 public: 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 setPosition(const FloatPoint3D&) OVERRIDE; 51 virtual bool setPointsAt(const FloatPoint3D&) OVERRIDE; 52 53 virtual bool setSpecularExponent(float) OVERRIDE; 54 virtual bool setLimitingConeAngle(float) OVERRIDE; 55 56 virtual void initPaintingData(PaintingData&) const OVERRIDE; 57 virtual void updatePaintingData(PaintingData&, int x, int y, float z) const OVERRIDE; 58 59 virtual TextStream& externalRepresentation(TextStream&) const OVERRIDE; 60 61 private: 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) 69 { 70 } 71 72 FloatPoint3D m_position; 73 FloatPoint3D m_direction; 74 75 float m_specularExponent; 76 float m_limitingConeAngle; 77 }; 78 79 } // namespace blink 80 81 #endif // SpotLightSource_h 82
