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Diffstat (limited to 'tests/benchmarks/gui/image/qimageconversion/tst_qimageconversion.cpp')
-rw-r--r-- | tests/benchmarks/gui/image/qimageconversion/tst_qimageconversion.cpp | 108 |
1 files changed, 108 insertions, 0 deletions
diff --git a/tests/benchmarks/gui/image/qimageconversion/tst_qimageconversion.cpp b/tests/benchmarks/gui/image/qimageconversion/tst_qimageconversion.cpp new file mode 100644 index 0000000..1c76d46 --- /dev/null +++ b/tests/benchmarks/gui/image/qimageconversion/tst_qimageconversion.cpp @@ -0,0 +1,108 @@ +/**************************************************************************** +** +** 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" |