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+/****************************************************************************
+**
+** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the test suite 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 <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"