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#include <QtGui>

#include <QString>

#include <qtest.h>

void paint(QPaintDevice *device)

{

    QPainter p(device);

    p.setCompositionMode(QPainter::CompositionMode_Source);

    p.fillRect(0, 0, device->width(), device->height(), Qt::transparent);

    QLinearGradient g(QPoint(0, 0), QPoint(1, 1));

//    g.setCoordinateMode(QGradient::ObjectBoundingMode);

    g.setColorAt(0, Qt::magenta);

    g.setColorAt(0, Qt::white);

//    p.setOpacity(0.8);

    p.setPen(Qt::NoPen);

    p.setBrush(g);

    p.setRenderHint(QPainter::Antialiasing);

    p.setOpacity(0.9);

    p.drawEllipse(0, 0, device->width(), device->height());

}

QLatin1String compositionModes[] = {

    QLatin1String("SourceOver"),

    QLatin1String("DestinationOver"),

    QLatin1String("Clear"),

    QLatin1String("Source"),

    QLatin1String("Destination"),

    QLatin1String("SourceIn"),

    QLatin1String("DestinationIn"),

    QLatin1String("SourceOut"),

    QLatin1String("DestinationOut"),

    QLatin1String("SourceAtop"),

    QLatin1String("DestinationAtop"),

    QLatin1String("Xor"),

    //svg 1.2 blend modes

    QLatin1String("Plus"),

    QLatin1String("Multiply"),

    QLatin1String("Screen"),

    QLatin1String("Overlay"),

    QLatin1String("Darken"),

    QLatin1String("Lighten"),

    QLatin1String("ColorDodge"),

    QLatin1String("ColorBurn"),

    QLatin1String("HardLight"),

    QLatin1String("SoftLight"),

    QLatin1String("Difference"),

    QLatin1String("Exclusion")

};

enum BrushType { ImageBrush, SolidBrush };

QLatin1String brushTypes[] = {

    QLatin1String("ImageBrush"),

    QLatin1String("SolidBrush"),

};

class BlendBench : public QObject

{

    Q_OBJECT

private slots:		

    void blendBench_data();

    void blendBench();

};

void BlendBench::blendBench_data()

{

    int first = 0;

    int limit = 12;

    if (qApp->arguments().contains("--extended")) {

        first = 12;

        limit = 24;

    }

    QTest::addColumn<int>("brushType");

    QTest::addColumn<int>("compositionMode");

    for (int brush = ImageBrush; brush <= SolidBrush; ++brush)

        for (int mode = first; mode < limit; ++mode)

            QTest::newRow(QString("brush=%1; mode=%2")

                          .arg(brushTypes[brush]).arg(compositionModes[mode]).toAscii().data())

                << brush << mode;

}

void BlendBench::blendBench()

{

    QFETCH(int, brushType);

    QFETCH(int, compositionMode);

    QImage img(512, 512, QImage::Format_ARGB32_Premultiplied);

    QImage src(512, 512, QImage::Format_ARGB32_Premultiplied);

    paint(&src);

    QPainter p(&img);

    p.setPen(Qt::NoPen);

    p.setCompositionMode(QPainter::CompositionMode(compositionMode));

    if (brushType == ImageBrush) {

        p.setBrush(QBrush(src));

    } else if (brushType == SolidBrush) {

        p.setBrush(QColor(127, 127, 127, 127));

    }

    QBENCHMARK {

        p.drawRect(0, 0, 512, 512);

    }

}

QTEST_MAIN(BlendBench)

#include "main.moc"