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#include <QtGui>

#include <QtOpenGL>

#include <qtest.h>

#include <private/qpaintengine_opengl_p.h>

class OpenGLBench : public QObject

{

    Q_OBJECT

private slots:

    void initTestCase();

    void cleanupTestCase();

    void imageDrawing_data();

    void imageDrawing();

    void pathDrawing_data();

    void pathDrawing();

    void painterOverhead();

    void startupCost_data();

    void startupCost();

    void lineDrawing();

    void textDrawing_data();

    void textDrawing();

    void clippedPainting_data();

    void clippedPainting();

    void gradients_data();

    void gradients();

    void textureUpload_data();

    void textureUpload();

private:

    QGLPixelBuffer *pb;

};

void OpenGLBench::initTestCase()

{

    pb = new QGLPixelBuffer(512, 512);

    QPainter p(pb);

    p.setRenderHint(QPainter::Antialiasing);

    p.setRenderHint(QPainter::HighQualityAntialiasing);

    p.drawImage(0, 0, QImage(256, 256, QImage::Format_ARGB32_Premultiplied));

}

void OpenGLBench::cleanupTestCase()

{

    delete pb;

}

void OpenGLBench::imageDrawing_data()

{

    QTest::addColumn<bool>("smoothPixmapTransform");

    QTest::addColumn<bool>("highQualityAntialiasing");

    QTest::addColumn<bool>("pixmap");

    for (int i = 0; i < (1 << 3); ++i) {

        bool smoothPixmapTransform = i & 1;

        bool highQualityAntialiasing = i & 2;

        bool pixmap = i & 4;

        QTest::newRow(QString("pixmap=%1 highQualityAntialiasing=%2 smoothPixmapTransform=%3")

                      .arg(pixmap).arg(highQualityAntialiasing).arg(smoothPixmapTransform).toAscii().data())

            << pixmap << highQualityAntialiasing << smoothPixmapTransform;

    }

}

void OpenGLBench::imageDrawing()

{

    QFETCH(bool, smoothPixmapTransform);

    QFETCH(bool, highQualityAntialiasing);

    QFETCH(bool, pixmap);

    QImage img;

    QPixmap pm;

    if (pixmap)

        pm = QPixmap(800, 800);

    else

        img = QImage(800, 800, QImage::Format_ARGB32_Premultiplied);

    QPainter p(pb);

    p.setRenderHint(QPainter::SmoothPixmapTransform, smoothPixmapTransform);

    p.setRenderHint(QPainter::Antialiasing, highQualityAntialiasing);

    p.setRenderHint(QPainter::HighQualityAntialiasing, highQualityAntialiasing);

    QBENCHMARK {

        if (pixmap) {

            pm.detach();

            p.drawPixmap(0, 0, pm);

        } else {

            img.detach();

            p.drawImage(0, 0, img);

        }

    }

}

Q_DECLARE_METATYPE(QPainterPath)

void OpenGLBench::pathDrawing_data()

{

    QTest::addColumn<QPainterPath>("path");

    QTest::addColumn<bool>("highQualityAntialiasing");

    QList<QPair<QPainterPath, QLatin1String> > paths;

    {

        QPainterPath path;

        path.addRect(-100, -100, 200, 200);

        paths << qMakePair(path, QLatin1String("plain rect"));

    }

    {

        QPainterPath path;

        path.addRoundedRect(-100, -100, 200, 200, 50, 50);

        paths << qMakePair(path, QLatin1String("rounded rect"));

    }

    {

        QPainterPath path;

        path.addEllipse(-100, -100, 200, 200);

        paths << qMakePair(path, QLatin1String("ellipse"));

    }

    for (int j = 0; j < (1 << 1); ++j) {

        bool highQualityAntialiasing = j & 1;

        for (int i = 0; i < paths.size(); ++i) {

            QTest::newRow(QString("path=%1 highQualityAntialiasing=%2")

                    .arg(paths[i].second).arg(highQualityAntialiasing).toAscii().data())

                << paths[i].first << highQualityAntialiasing;

        }

    }

}

void OpenGLBench::pathDrawing()

{

    QFETCH(QPainterPath, path);

    QFETCH(bool, highQualityAntialiasing);

    // warm-up

    {

        QPainterPath dummy;

        dummy.addRect(-1, -1, 2, 2);

        QPainter p(pb);

        p.setRenderHint(QPainter::Antialiasing, highQualityAntialiasing);

        p.setRenderHint(QPainter::HighQualityAntialiasing, highQualityAntialiasing);

        p.translate(pb->width() / 2, pb->height() / 2);

        p.rotate(30);

        p.drawPath(dummy);

        p.end();

    }

    QPainter p(pb);

    p.setPen(Qt::NoPen);

    p.setBrush(Qt::black);

    p.translate(pb->width() / 2, pb->height() / 2);

    QBENCHMARK {

        p.setRenderHint(QPainter::Antialiasing, highQualityAntialiasing);

        p.setRenderHint(QPainter::HighQualityAntialiasing, highQualityAntialiasing);

        p.rotate(0.01);

        p.drawPath(path);

    }

}

void OpenGLBench::painterOverhead()

{

    QBENCHMARK {

        QPainter p(pb);

    }

}

void OpenGLBench::startupCost_data()

{

    QTest::addColumn<bool>("highQualityAntialiasing");

    QTest::newRow("highQualityAntialiasing=0") << false;

    QTest::newRow("highQualityAntialiasing=1") << true;

}

void OpenGLBench::startupCost()

{

    QFETCH(bool, highQualityAntialiasing);

    QPainterPath path;

    path.addRoundedRect(-100, -100, 200, 200, 20, 20);

    QBENCHMARK {

        QGLPixelBuffer buffer(512, 512);

        QPainter p(&buffer);

        p.setRenderHint(QPainter::Antialiasing, highQualityAntialiasing);

        p.setRenderHint(QPainter::HighQualityAntialiasing, highQualityAntialiasing);

        p.translate(buffer.width() / 2, buffer.height() / 2);

        p.drawPath(path);

    }

}

void OpenGLBench::lineDrawing()

{

    QPainter p(pb);

    QBENCHMARK {

        p.drawLine(10, 10, 500, 500);

    }

}

void OpenGLBench::textDrawing_data()

{

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

    int lines[] = { 1, 2, 4, 8, 16, 32, 64, 128 };

    QTest::newRow("text lines=1 (warmup run)") << 1;

    for (unsigned int i = 0; i < sizeof(lines) / sizeof(int); ++i)

        QTest::newRow(QString("text lines=%0").arg(lines[i]).toAscii().data()) << lines[i];

}

void OpenGLBench::textDrawing()

{

    QPainter p(pb);

    QFETCH(int, lines);

    p.translate(0, 16);

    QBENCHMARK {

        for (int i = 0; i < lines; ++i)

            p.drawText(0, i, "Hello World!");

    }

}

void OpenGLBench::clippedPainting_data()

{

    QTest::addColumn<QPainterPath>("path");

    QRectF rect = QRectF(0, 0, pb->width(), pb->height()).adjusted(5, 5, -5, -5);

    {

        QPainterPath path;

        path.addRect(rect);

        QTest::newRow("rect path") << path;

    }

    {

        QPainterPath path;

        path.addRoundedRect(rect, 5, 5);

        QTest::newRow("rounded rect path") << path;

    }

    {

        QPainterPath path;

        path.addEllipse(rect);

        QTest::newRow("ellipse path") << path;

    }

}

void OpenGLBench::clippedPainting()

{

    QFETCH(QPainterPath, path);

    QBENCHMARK {

        QPainter p(pb);

        p.setPen(Qt::NoPen);

        p.setBrush(Qt::black);

        p.setClipPath(path);

        p.drawRect(0, 0, pb->width(), pb->height());

    }

}

Q_DECLARE_METATYPE(QGradient::Type)

void OpenGLBench::gradients_data()

{

    QTest::addColumn<QGradient::Type>("gradientType");

    QTest::addColumn<bool>("objectBoundingMode");

    QTest::newRow("warmup run") << QGradient::LinearGradient << false;

    QTest::newRow("linear gradient") << QGradient::LinearGradient << false;

    QTest::newRow("radial gradient") << QGradient::RadialGradient << false;

    QTest::newRow("conical gradient") << QGradient::ConicalGradient << false;

    QTest::newRow("linear gradient, object bounding mode") << QGradient::LinearGradient << true;

    QTest::newRow("radial gradient, object bounding mode") << QGradient::RadialGradient << true;

    QTest::newRow("conical gradient, object bounding mode") << QGradient::ConicalGradient << true;

}

void OpenGLBench::gradients()

{

    QFETCH(QGradient::Type, gradientType);

    QFETCH(bool, objectBoundingMode);

    QPointF a;

    QPointF b = objectBoundingMode ? QPointF(1, 1) : QPointF(pb->width(), pb->height());

    QGradient gradient;

    switch (gradientType) {

    case QGradient::LinearGradient:

        gradient = QLinearGradient(a, b);

        break;

    case QGradient::RadialGradient:

        gradient = QRadialGradient(a, b.x() / 2, b);

        break;

    case QGradient::ConicalGradient:

        gradient = QConicalGradient((a + b)/2, 0);

        break;

    default:

        break;

    }

    if (objectBoundingMode)

        gradient.setCoordinateMode(QGradient::ObjectBoundingMode);

    gradient.setColorAt(0, Qt::red);

    gradient.setColorAt(0.2, Qt::blue);

    gradient.setColorAt(0.4, Qt::transparent);

    gradient.setColorAt(0.6, Qt::green);

    gradient.setColorAt(0.8, Qt::black);

    gradient.setColorAt(1, Qt::white);

    QPainter p(pb);

    QBENCHMARK {

        p.fillRect(0, 0, pb->width(), pb->height(), gradient);

        glFinish();

    }

}

void OpenGLBench::textureUpload_data()

{

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

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

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

    int sizes[] = { 8, 10, 16, 20, 32, 50, 64, 100, 128, 200, 256, 500, 512, 1000, 1024, 2000, 2048, -1 };

    int flags[] = { QGLContext::InternalBindOption,

                  QGLContext::DefaultBindOption,

                  -1 };

    int formats[] = { GL_RGB, GL_RGBA, -1 };

    for (int s = 0; sizes[s] != -1; ++s) {

        for (int f = 0; flags[f] != -1; ++f) {

            for (int a = 0; formats[a] != -1; ++a) {

                QByteArray name;

                name.append("size=").append(QByteArray::number(sizes[s]));

                name.append(", flags=").append(f == 0 ? "internal" : "default");

                name.append(", format=").append(a == 0 ? "RGB" : "RGBA");

                QTest::newRow(name.constData()) << sizes[s] << flags[f] << formats[a];

            }

        }

    }

}

void OpenGLBench::textureUpload()

{

    QFETCH(int, size);

    QFETCH(int, flags);

    QFETCH(int, format);

    QPixmap pixmap(size, size);

    if (format == GL_RGB)

        pixmap.fill(Qt::red);

    else

        pixmap.fill(Qt::transparent);

    pb->makeCurrent();

    QGLContext *context = const_cast<QGLContext *>(QGLContext::currentContext());

    QTime time;

    time.start();

    context->bindTexture(pixmap, GL_TEXTURE_2D, format, (QGLContext::BindOptions) flags);

    QTest::setBenchmarkResult(time.elapsed(), QTest::WalltimeMilliseconds);

}

QTEST_MAIN(OpenGLBench)

#include "main.moc"