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Diffstat (limited to 'digikam/imageplugins/oilpaint/oilpaint.cpp')
| -rw-r--r-- | digikam/imageplugins/oilpaint/oilpaint.cpp | 203 |
1 files changed, 203 insertions, 0 deletions
diff --git a/digikam/imageplugins/oilpaint/oilpaint.cpp b/digikam/imageplugins/oilpaint/oilpaint.cpp new file mode 100644 index 0000000..b17b240 --- /dev/null +++ b/digikam/imageplugins/oilpaint/oilpaint.cpp @@ -0,0 +1,203 @@ +/* ============================================================ + * + * This file is a part of digiKam project + * http://www.digikam.org + * + * Date : 2005-05-25 + * Description : Oil Painting threaded image filter. + * + * Copyright (C) 2005-2007 by Gilles Caulier <caulier dot gilles at gmail dot com> + * Copyright (C) 2006-2007 by Marcel Wiesweg <marcel dot wiesweg at gmx dot de> + * + * Original OilPaint algorithm copyrighted 2004 by + * Pieter Z. Voloshyn <pieter dot voloshyn at gmail dot com>. + * + * This program is free software; you can redistribute it + * and/or modify it under the terms of the GNU General + * Public License as published by the Free Software Foundation; + * either version 2, or (at your option) + * any later version. + * + * This program 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 General Public License for more details. + * + * ============================================================ */ + +// C++ includes. + +#include <cmath> +#include <cstdlib> + +// Local includes. + +#include "ddebug.h" +#include "dimg.h" +#include "dimggaussianblur.h" +#include "dimgimagefilters.h" +#include "oilpaint.h" + +namespace DigikamOilPaintImagesPlugin +{ + +OilPaint::OilPaint(Digikam::DImg *orgImage, QObject *parent, int brushSize, int smoothness) + : Digikam::DImgThreadedFilter(orgImage, parent, "OilPaint") +{ + m_brushSize = brushSize; + m_smoothness = smoothness; + initFilter(); +} + +void OilPaint::filterImage(void) +{ + oilpaintImage(m_orgImage, m_destImage, m_brushSize, m_smoothness); +} + +// This method have been ported from Pieter Z. Voloshyn algorithm code. + +/* Function to apply the OilPaint effect. + * + * data => The image data in RGBA mode. + * w => Width of image. + * h => Height of image. + * BrushSize => Brush size. + * Smoothness => Smooth value. + * + * Theory => Using MostFrequentColor function we take the main color in + * a matrix and simply write at the original position. + */ + +void OilPaint::oilpaintImage(Digikam::DImg &orgImage, Digikam::DImg &destImage, int BrushSize, int Smoothness) +{ + int progress; + Digikam::DColor mostFrequentColor; + int w,h; + + mostFrequentColor.setSixteenBit(orgImage.sixteenBit()); + w = (int)orgImage.width(); + h = (int)orgImage.height(); + uchar *dest = destImage.bits(); + int bytesDepth = orgImage.bytesDepth(); + uchar *dptr; + + // Allocate some arrays to be used. + // Do this here once for all to save a few million new / delete operations + m_intensityCount = new uchar[Smoothness + 1]; + m_averageColorR = new uint[Smoothness + 1]; + m_averageColorG = new uint[Smoothness + 1]; + m_averageColorB = new uint[Smoothness + 1]; + + for (int h2 = 0; !m_cancel && (h2 < h); h2++) + { + for (int w2 = 0; !m_cancel && (w2 < w); w2++) + { + mostFrequentColor = MostFrequentColor(orgImage, w2, h2, BrushSize, Smoothness); + dptr = dest + w2*bytesDepth + (w*h2*bytesDepth); + mostFrequentColor.setPixel(dptr); + } + + progress = (int) (((double)h2 * 100.0) / h); + if ( progress%5 == 0 ) + postProgress( progress ); + } + + // free all the arrays + delete [] m_intensityCount; + delete [] m_averageColorR; + delete [] m_averageColorG; + delete [] m_averageColorB; +} + +// This method have been ported from Pieter Z. Voloshyn algorithm code. + +/* Function to determine the most frequent color in a matrix + * + * Bits => Bits array + * Width => Image width + * Height => Image height + * X => Position horizontal + * Y => Position vertical + * Radius => Is the radius of the matrix to be analized + * Intensity => Intensity to calcule + * + * Theory => This function creates a matrix with the analized pixel in + * the center of this matrix and find the most frequenty color + */ + +Digikam::DColor OilPaint::MostFrequentColor(Digikam::DImg &src, int X, int Y, int Radius, int Intensity) +{ + int i, w, h, I, Width, Height; + uint red, green, blue; + + uchar *dest = src.bits(); + int bytesDepth = src.bytesDepth(); + uchar *sptr; + bool sixteenBit = src.sixteenBit(); + + Digikam::DColor mostFrequentColor; + + double Scale = Intensity / (sixteenBit ? 65535.0 : 255.0); + Width = (int)src.width(); + Height = (int)src.height(); + + // Erase the array + memset(m_intensityCount, 0, (Intensity + 1) * sizeof (uchar)); + + for (w = X - Radius; w <= X + Radius; w++) + { + for (h = Y - Radius; h <= Y + Radius; h++) + { + // This condition helps to identify when a point doesn't exist + + if ((w >= 0) && (w < Width) && (h >= 0) && (h < Height)) + { + sptr = dest + w*bytesDepth + (Width*h*bytesDepth); + Digikam::DColor color(sptr, sixteenBit); + red = (uint)color.red(); + green = (uint)color.green(); + blue = (uint)color.blue(); + + I = lround(GetIntensity (red, green, blue) * Scale); + m_intensityCount[I]++; + + if (m_intensityCount[I] == 1) + { + m_averageColorR[I] = red; + m_averageColorG[I] = green; + m_averageColorB[I] = blue; + } + else + { + m_averageColorR[I] += red; + m_averageColorG[I] += green; + m_averageColorB[I] += blue; + } + } + } + } + + I = 0; + int MaxInstance = 0; + + for (i = 0 ; i <= Intensity ; i++) + { + if (m_intensityCount[i] > MaxInstance) + { + I = i; + MaxInstance = m_intensityCount[i]; + } + } + + // get Alpha channel value from original (unchanged) + mostFrequentColor = src.getPixelColor(X, Y); + + // Overwrite RGB values to destination. + mostFrequentColor.setRed(m_averageColorR[I] / MaxInstance); + mostFrequentColor.setGreen(m_averageColorG[I] / MaxInstance); + mostFrequentColor.setBlue(m_averageColorB[I] / MaxInstance); + + return mostFrequentColor; +} + +} // NameSpace DigikamOilPaintImagesPlugin |