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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only
#include <qtest.h>
#include <QImage>
class tst_QImageScale : public QObject
{
Q_OBJECT
private slots:
void scaleRgb32_data();
void scaleRgb32();
void scaleArgb32pm_data();
void scaleArgb32pm();
private:
QImage generateImageRgb32(int width, int height);
QImage generateImageArgb32(int width, int height);
};
void tst_QImageScale::scaleRgb32_data()
{
QTest::addColumn<QImage>("inputImage");
QTest::addColumn<QSize>("outputSize");
QImage image = generateImageRgb32(1000, 1000);
QTest::newRow("1000x1000 -> 2000x2000") << image << QSize(2000, 2000);
QTest::newRow("1000x1000 -> 2000x1000") << image << QSize(2000, 1000);
QTest::newRow("1000x1000 -> 1000x2000") << image << QSize(1000, 2000);
QTest::newRow("1000x1000 -> 2000x500") << image << QSize(2000, 500);
QTest::newRow("1000x1000 -> 500x2000") << image << QSize(500, 2000);
QTest::newRow("1000x1000 -> 500x500") << image << QSize(500, 500);
QTest::newRow("1000x1000 -> 200x200") << image << QSize(200, 200);
}
void tst_QImageScale::scaleRgb32()
{
QFETCH(QImage, inputImage);
QFETCH(QSize, outputSize);
QBENCHMARK {
volatile QImage output = inputImage.scaled(outputSize, Qt::IgnoreAspectRatio, Qt::SmoothTransformation);
// we need the volatile and the following to make sure the compiler does not do
// anything stupid :)
(void)output;
}
}
void tst_QImageScale::scaleArgb32pm_data()
{
QTest::addColumn<QImage>("inputImage");
QTest::addColumn<QSize>("outputSize");
QImage image = generateImageArgb32(1000, 1000).convertToFormat(QImage::Format_ARGB32_Premultiplied);
QTest::newRow("1000x1000 -> 2000x2000") << image << QSize(2000, 2000);
QTest::newRow("1000x1000 -> 2000x1000") << image << QSize(2000, 1000);
QTest::newRow("1000x1000 -> 1000x2000") << image << QSize(1000, 2000);
QTest::newRow("1000x1000 -> 2000x500") << image << QSize(2000, 500);
QTest::newRow("1000x1000 -> 500x2000") << image << QSize(500, 2000);
QTest::newRow("1000x1000 -> 500x500") << image << QSize(500, 500);
QTest::newRow("1000x1000 -> 200x200") << image << QSize(200, 200);
}
void tst_QImageScale::scaleArgb32pm()
{
QFETCH(QImage, inputImage);
QFETCH(QSize, outputSize);
QBENCHMARK {
volatile QImage output = inputImage.scaled(outputSize, Qt::IgnoreAspectRatio, Qt::SmoothTransformation);
// we need the volatile and the following to make sure the compiler does not do
// anything stupid :)
(void)output;
}
}
/*
Fill a RGB32 image with "random" pixel values.
*/
QImage tst_QImageScale::generateImageRgb32(int width, int height)
{
QImage image(width, height, QImage::Format_RGB32);
for (int y = 0; y < image.height(); ++y) {
QRgb *scanline = (QRgb*)image.scanLine(y);
for (int x = 0; x < width; ++x)
scanline[x] = qRgb(x, y, x ^ y);
}
return image;
}
/*
Fill a ARGB32 image with "random" pixel values.
*/
QImage tst_QImageScale::generateImageArgb32(int width, int height)
{
QImage image(width, height, QImage::Format_ARGB32);
const int byteWidth = width * 4;
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_QImageScale)
#include "tst_qimagescale.moc"
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