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/****************************************************************************
**
** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the examples of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** No Commercial Usage
** This file contains pre-release code and may not be distributed.
** You may use this file in accordance with the terms and conditions
** contained in the Technology Preview License Agreement accompanying
** this package.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain additional
** rights. These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** If you have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
**
**
**
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#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)
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