/* This file is proposed to be part of the KDE libraries. * Copyright (C) 2003 Laur Ivan <laurivan@eircom.net> * * Many thanks to: * - Bernardo Hung <deciare@gta.igs.net> for the enhanced shadow * algorithm (currently used) * - Tim Jansen <tim@tjansen.de> for the API updates and fixes. * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Library General Public * License version 2 as published by the Free Software Foundation. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Library General Public License for more details. * * You should have received a copy of the GNU Library General Public License * along with this library; see the file COPYING.LIB. If not, write to * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, * Boston, MA 02110-1301, USA. */ #ifndef __FX_SHADOW #define __FX_SHADOW #include <tqpixmap.h> #include <tqimage.h> #include <tqcolor.h> class KShadowSettings; /** * This class implements the shadow algorithm(s). It uses a FxData * object for its parameters. Note that the shadow algorithm is using the * luminosity of the original pixmap for the shadow one. * @see KShadowSettings * @author laur.ivan@corvil.com * @since 3.2 */ class KShadowEngine { public: /// Creates a new shadow engine. KShadowEngine(); ~KShadowEngine(); /** * Creates a new shadow engine. * @param fx the shadow settings object with the configuration. The Shadow * Engine will own this object and also delete it. Must * be heap-allocated */ KShadowEngine(KShadowSettings *fx); /** * Set the KShadowSettings object. * @param fx the shadow settings object with the configuration. The Shadow * Engine will own this object and also delete it. Must * be heap-allocated. */ void setShadowSettings(KShadowSettings *fx); /** * Get the current KShadowSettings. * @param the current shadow settings */ KShadowSettings *shadowSettings(); /** * Make shadow! * * textPixmap is the original pixmap where a (white) text is drawn. * bgColor is the color used for the shadow. * @param textPixmap the pixmap of the text * @param bgColor the background color * @return the resulting image */ TQImage makeShadow(const TQPixmap& textPixmap, const TQColor &bgColor); private: // No static objects in libs, and no static deleters in tdefx... //static KShadowSettings s_defaultShadowSettings; KShadowSettings *m_shadowSettings; /* * a simple algorithm with 3 pixels thickness */ double defaultDecay(TQImage& source, int x, int y); /* * a slower algorithm where the influence of a pixel * is tqGray(px)/(abs(dx) + abs(dy) +1). */ double doubleLinearDecay(TQImage& source, int x, int y); /* * a very slow algorithm where the influence of a pixel * is tqGray(px)/(sqrt(sqr(dx) + sqr(dy)) +1). */ double radialDecay(TQImage& source, int x, int y); /* * a nice/fast algorithm proposed by Bernardo Hung */ double noDecay(TQImage& source, int x, int y); void *d; }; #endif