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#include <QDebug>

#include <qtest.h>

#include <QtTest/QtTest>

#include <QFile>

#include <QByteArray>

#include <QBuffer>

#include <QImageReader>

#include <QSize>

#if defined(Q_OS_SYMBIAN)

# define SRCDIR ""

#endif

class tst_jpeg : public QObject

{

    Q_OBJECT

private slots:

    void jpegDecodingQtWebkitStyle();

};

void tst_jpeg::jpegDecodingQtWebkitStyle()

{

    // QtWebkit currently calls size() to get the image size for layouting purposes.

    // Then when it is in the viewport (we assume that here) it actually gets decoded.

    QFile inputJpeg(SRCDIR "n900.jpeg");

    QVERIFY(inputJpeg.exists());

    inputJpeg.open(QIODevice::ReadOnly);

    QByteArray imageData = inputJpeg.readAll();

    QBuffer buffer;

    buffer.setData(imageData);

    buffer.open(QBuffer::ReadOnly);

    QCOMPARE(buffer.size(), qint64(19016));

    QBENCHMARK{

        for (int i = 0; i < 50; i++) {

            QImageReader reader(&buffer, "jpeg");

            QSize size = reader.size();

            QVERIFY(!size.isNull());

            QByteArray format = reader.format();

            QVERIFY(!format.isEmpty());

            QImage img = reader.read();

            QVERIFY(!img.isNull());

            buffer.reset();

        }

    }

}

QTEST_MAIN(tst_jpeg)

#include "jpeg.moc"