File indexing completed on 2024-05-19 04:22:56
0001 /* 0002 Copyright (c) 2003-2007 Clarence Dang <dang@kde.org> 0003 All rights reserved. 0004 0005 Redistribution and use in source and binary forms, with or without 0006 modification, are permitted provided that the following conditions 0007 are met: 0008 0009 1. Redistributions of source code must retain the above copyright 0010 notice, this list of conditions and the following disclaimer. 0011 2. Redistributions in binary form must reproduce the above copyright 0012 notice, this list of conditions and the following disclaimer in the 0013 documentation and/or other materials provided with the distribution. 0014 0015 THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 0016 IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 0017 OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 0018 IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 0019 INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 0020 NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 0021 DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 0022 THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 0023 (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 0024 THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 0025 */ 0026 0027 0028 #define DEBUG_KP_EFFECT_EMBOSS 0 0029 0030 0031 #include "kpEffectEmboss.h" 0032 #include "blitz.h" 0033 0034 #include "kpLogCategories.h" 0035 0036 #include "pixmapfx/kpPixmapFX.h" 0037 0038 0039 static QImage EmbossQImage (const QImage &qimage_, int strength) 0040 { 0041 QImage qimage = qimage_; 0042 if (strength == 0) { 0043 return qimage; 0044 } 0045 0046 0047 // The numbers that follow were picked by experimentation to try to get 0048 // an effect linearly proportional to <strength> and at the same time, 0049 // be fast enough. 0050 // 0051 // I still have no idea what "radius" and "sigma" mean. 0052 0053 const auto radius = 0.0; 0054 0055 const auto sigma = 1.0; 0056 0057 const auto repeat = 1; 0058 0059 0060 for (int i = 0; i < repeat; i++) 0061 { 0062 qimage = Blitz::emboss (qimage, radius, sigma); 0063 } 0064 0065 0066 return qimage; 0067 } 0068 0069 0070 // public static 0071 kpImage kpEffectEmboss::applyEffect (const kpImage &image, int strength) 0072 { 0073 #if DEBUG_KP_EFFECT_EMBOSS 0074 qCDebug(kpLogImagelib) << "kpEffectEmboss::applyEffect(strength=" << strength << ")" 0075 << endl; 0076 #endif 0077 0078 Q_ASSERT (strength >= MinStrength && strength <= MaxStrength); 0079 0080 return ::EmbossQImage (image, strength); 0081 }