/******************************************************************************** Copyright (C) 2005-2006 Trolltech ASA. All rights reserved.**** This file is part of the example classes of the Qt Toolkit.**** This file may be used under the terms of the GNU General Public** License version 2.0 as published by the Free Software Foundation** and appearing in the file LICENSE.GPL included in the packaging of** this file.  Please review the following information to ensure GNU** General Public Licensing requirements will be met:** http://www.trolltech.com/products/qt/opensource.html**** If you are unsure which license is appropriate for your use, please** review the following information:** http://www.trolltech.com/products/qt/licensing.html or contact the** sales department at sales@trolltech.com.**** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.******************************************************************************/#include <QtGui>#include <math.h>#include <stdlib.h>#include "extrafiltersplugin.h"QStringList ExtraFiltersPlugin::filters() const{    return QStringList() << tr("Flip Horizontally") << tr("Flip Vertically")                         << tr("Smudge...") << tr("Threshold...");}QImage ExtraFiltersPlugin::filterImage(const QString &filter,                                       const QImage &image, QWidget *parent){    QImage original = image.convertToFormat(QImage::Format_RGB32);    QImage result = original;    if (filter == tr("Flip Horizontally")) {        for (int y = 0; y < original.height(); ++y) {            for (int x = 0; x < original.width(); ++x) {                int pixel = original.pixel(original.width() - x - 1, y);                result.setPixel(x, y, pixel);            }        }    } else if (filter == tr("Flip Vertically")) {        for (int y = 0; y < original.height(); ++y) {            for (int x = 0; x < original.width(); ++x) {                int pixel = original.pixel(x, original.height() - y - 1);                result.setPixel(x, y, pixel);            }        }    } else if (filter == tr("Smudge...")) {        bool ok;        int numIters = QInputDialog::getInteger(parent, tr("Smudge Filter"),                                    tr("Enter number of iterations:"),                                    5, 1, 20, 1, &ok);        if (ok) {            for (int i = 0; i < numIters; ++i) {                for (int y = 1; y < original.height() - 1; ++y) {                    for (int x = 1; x < original.width() - 1; ++x) {                        int p1 = original.pixel(x, y);                        int p2 = original.pixel(x, y + 1);                        int p3 = original.pixel(x, y - 1);                        int p4 = original.pixel(x + 1, y);                        int p5 = original.pixel(x - 1, y);                        int red = (qRed(p1) + qRed(p2) + qRed(p3) + qRed(p4)                                   + qRed(p5)) / 5;                        int green = (qGreen(p1) + qGreen(p2) + qGreen(p3)                                     + qGreen(p4) + qGreen(p5)) / 5;                        int blue = (qBlue(p1) + qBlue(p2) + qBlue(p3)                                    + qBlue(p4) + qBlue(p5)) / 5;                        int alpha = (qAlpha(p1) + qAlpha(p2) + qAlpha(p3)                                     + qAlpha(p4) + qAlpha(p5)) / 5;                        result.setPixel(x, y, qRgba(red, green, blue, alpha));                    }                }            }        }    } else if (filter == tr("Threshold...")) {        bool ok;        int threshold = QInputDialog::getInteger(parent, tr("Threshold Filter"),                                                 tr("Enter threshold:"),                                                 10, 1, 256, 1, &ok);        if (ok) {            int factor = 256 / threshold;            for (int y = 0; y < original.height(); ++y) {                for (int x = 0; x < original.width(); ++x) {                    int pixel = original.pixel(x, y);                    result.setPixel(x, y, qRgba(qRed(pixel) / factor * factor,                                                qGreen(pixel) / factor * factor,                                                qBlue(pixel) / factor * factor,                                                qAlpha(pixel)));                }            }        }    }    return result;}Q_EXPORT_PLUGIN2(pnp_extrafilters, ExtraFiltersPlugin)