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134 lines
4.2 KiB
134 lines
4.2 KiB
/* ============================================================
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*
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* This file is a part of digiKam project
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* http://www.digikam.org
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*
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* Date : 2005-24-01
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* Description : misc image filters
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*
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* Copyright (C) 2004-2007 by Gilles Caulier <caulier dot gilles at gmail dot com>
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*
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* This program is free software; you can redistribute it
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* and/or modify it under the terms of the GNU General
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* Public License as published by the Free Software Foundation;
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* either version 2, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* ============================================================ */
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#ifndef DIMGIMAGE_FILTERS_H
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#define DIMGIMAGE_FILTERS_H
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#define CLAMP0255(a) TQMIN(TQMAX(a,0), 255)
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#define CLAMP065535(a) TQMIN(TQMAX(a,0), 65535)
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#define CLAMP(x,l,u) ((x)<(l)?(l):((x)>(u)?(u):(x)))
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#define ROUND(x) ((int) ((x) + 0.5))
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// C++ includes.
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#include <cmath>
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// Digikam includes.
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#include "digikam_export.h"
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namespace Digikam
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{
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class DIGIKAM_EXPORT DImgImageFilters
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{
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public:
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DImgImageFilters(){};
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~DImgImageFilters(){};
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private: // Private structures used internally.
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struct double_packet
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{
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double red;
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double green;
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double blue;
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double alpha;
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};
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struct int_packet
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{
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unsigned int red;
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unsigned int green;
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unsigned int blue;
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unsigned int alpha;
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};
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struct NormalizeParam
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{
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unsigned short *lut;
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double min;
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double max;
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};
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private: // Private methods used internally.
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// Methods for Channel Mixer.
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inline double CalculateNorm(float RedGain, float GreenGain, float BlueGain, bool bPreserveLum)
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{
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double lfSum = RedGain + GreenGain + BlueGain;
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if ((lfSum == 0.0) || (bPreserveLum == false))
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return (1.0);
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return( fabs (1.0 / lfSum) );
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};
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inline unsigned short MixPixel(float RedGain, float GreenGain, float BlueGain,
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unsigned short R, unsigned short G, unsigned short B, bool sixteenBit,
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double Norm)
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{
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double lfMix = RedGain * (double)R + GreenGain * (double)G + BlueGain * (double)B;
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lfMix *= Norm;
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int segment = sixteenBit ? 65535 : 255;
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return( (unsigned short)CLAMP (lfMix, 0, segment) );
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};
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inline int setPositionAdjusted (int Width, int Height, int X, int Y)
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{
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X = (X < 0) ? 0 : (X >= Width ) ? Width - 1 : X;
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Y = (Y < 0) ? 0 : (Y >= Height) ? Height - 1 : Y;
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return (Y*Width*4 + 4*X);
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};
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public: // Public methods.
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void equalizeImage(uchar *data, int w, int h, bool sixteenBit);
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void stretchContrastImage(uchar *data, int w, int h, bool sixteenBit);
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void normalizeImage(uchar *data, int w, int h, bool sixteenBit);
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void autoLevelsCorrectionImage(uchar *data, int w, int h, bool sixteenBit);
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void invertImage(uchar *data, int w, int h, bool sixteenBit);
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void channelMixerImage(uchar *data, int Width, int Height, bool sixteenBit,
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bool bPreserveLum, bool bMonochrome,
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float rrGain, float rgGain, float rbGain,
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float grGain, float ggGain, float gbGain,
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float brGain, float bgGain, float bbGain);
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void changeTonality(uchar *data, int width, int height, bool sixteenBit,
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int redMask, int greenMask, int blueMask);
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void gaussianBlurImage(uchar *data, int width, int height, bool sixteenBit, int radius);
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void sharpenImage(uchar *data, int width, int height, bool sixteenBit, int radius);
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void pixelAntiAliasing(uchar *data, int Width, int Height, double X, double Y,
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uchar *A, uchar *R, uchar *G, uchar *B);
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void pixelAntiAliasing16(unsigned short *data, int Width, int Height, double X, double Y,
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unsigned short *A, unsigned short *R, unsigned short *G, unsigned short *B);
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};
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} // NameSpace Digikam
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#endif /* DIMGIMAGE_FILTERS_H */
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