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/****************************************************************************
**
** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/
**
** This file is part of the test suite of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** GNU Lesser General Public License Usage
** 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.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU General
** Public License version 3.0 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 the GNU General
** Public License version 3.0 requirements will be met:
** http://www.gnu.org/copyleft/gpl.html.
**
** Other Usage
** Alternatively, this file may be used in accordance with the terms and
** conditions contained in a signed written agreement between you and Nokia.
**
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include <qtest.h>
#include <QImage>
Q_DECLARE_METATYPE(QImage)
class tst_QImageConversion : public QObject
{
Q_OBJECT
private slots:
void convertRgb888ToRGB32_data();
void convertRgb888ToRGB32();
private:
QImage generateImageRgb888(int width, int height);
};
void tst_QImageConversion::convertRgb888ToRGB32_data()
{
QTest::addColumn<QImage>("inputImage");
// height = 5000 to get interesting timing.
// 3 pixels wide -> smaller than regular vector of 128bits
QTest::newRow("width: 3px; height: 5000px;") << generateImageRgb888(3, 5000);
// 8 pixels wide -> potential for 2 vectors
QTest::newRow("width: 8px; height: 5000px;") << generateImageRgb888(3, 5000);
// 16 pixels, minimum for the SSSE3 implementation
QTest::newRow("width: 16px; height: 5000px;") << generateImageRgb888(16, 5000);
// 50 pixels, more realistic use case
QTest::newRow("width: 50px; height: 5000px;") << generateImageRgb888(50, 5000);
// 2000 pixels -> typical values for pictures
QTest::newRow("width: 2000px; height: 5000px;") << generateImageRgb888(2000, 5000);
}
void tst_QImageConversion::convertRgb888ToRGB32()
{
QFETCH(QImage, inputImage);
QBENCHMARK {
volatile QImage output = inputImage.convertToFormat(QImage::Format_RGB32);
// we need the volatile and the following to make sure the compiler does not do
// anything stupid :)
(void)output;
}
}
/*
Fill a RGB888 image with "random" pixel values.
*/
QImage tst_QImageConversion::generateImageRgb888(int width, int height)
{
QImage image(width, height, QImage::Format_RGB888);
const int byteWidth = width * 3;
for (int y = 0; y < image.height(); ++y) {
uchar *scanline = image.scanLine(y);
for (int x = 0; x < byteWidth; ++x)
scanline[x] = x ^ y;
}
return image;
}
QTEST_MAIN(tst_QImageConversion)
#include "tst_qimageconversion.moc"
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