qt 6.5.1 original

tests/benchmarks/gui/painting/qtbench/CMakeLists.txt

@@ -0,0 +1,15 @@
+# Copyright (C) 2022 The Qt Company Ltd.
+# SPDX-License-Identifier: BSD-3-Clause
+
+#####################################################################
+## tst_bench_qtbench Binary:
+#####################################################################
+
+qt_internal_add_benchmark(tst_bench_qtbench
+    SOURCES
+        tst_qtbench.cpp
+    LIBRARIES
+        Qt::Gui
+        Qt::Test
+        Qt::Widgets
+)

tests/benchmarks/gui/painting/qtbench/benchmarktests.h

@@ -0,0 +1,794 @@
+// Copyright (C) 2016 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
+
+#ifndef BENCHMARKTESTS_H
+#define BENCHMARKTESTS_H
+
+#include <QApplication>
+#include <QTextDocument>
+#include <QTextLayout>
+#include <QFontMetrics>
+#include <QDebug>
+#include <QStaticText>
+#include <QPainter>
+#include <QPainterPath>
+#include <QRandomGenerator>
+
+class Benchmark
+{
+public:
+    virtual ~Benchmark() {}
+
+    Benchmark(const QSize &size)
+            : m_size(size)
+    {
+        for (int i=0; i<16; ++i) {
+            m_colors[i] = QColor::fromRgbF((QRandomGenerator::global()->bounded(4)) / 3.0,
+                                           (QRandomGenerator::global()->bounded(4)) / 3.0,
+                                           (QRandomGenerator::global()->bounded(4)) / 3.0,
+                                           1);
+        }
+    }
+
+    virtual void draw(QPainter *p, const QRect &rect, int iteration) = 0;
+    virtual QString name() const = 0;
+
+    inline const QSize &size() const
+    {
+        return m_size;
+    }
+    virtual void begin(QPainter *, int iterations = 1) { Q_UNUSED(iterations); }
+    virtual void end(QPainter *) { }
+
+    inline const QColor &randomColor(int i) { return m_colors[i % 16]; }
+
+protected:
+    QColor m_colors[16];
+    QSize m_size;
+};
+
+class PaintingRectAdjuster
+{
+public:
+    PaintingRectAdjuster()
+            : m_benchmark(0),
+            m_bounds(),
+            m_screen_filled(false)
+    {
+    }
+
+    const QRect &newPaintingRect() {
+        m_rect.translate(m_rect.width(), 0);
+
+        if (m_rect.right() > m_bounds.width()) {
+            m_rect.moveLeft(m_bounds.left());
+            m_rect.translate(0,m_rect.height());
+            if (m_rect.bottom() > m_bounds.height()) {
+                m_screen_filled = true;
+                m_rect.moveTo(m_bounds.topLeft());
+            }
+        }
+        return m_rect;
+    }
+
+    inline bool isScreenFilled() const
+    { return m_screen_filled; }
+
+    void reset(const QRect &bounds)
+    {
+        m_bounds = bounds;
+        m_rect.moveTo(m_bounds.topLeft());
+        m_rect = QRect(m_bounds.topLeft(),m_benchmark->size());
+        m_rect.translate(-m_rect.width(),0);
+        m_screen_filled = false;
+    }
+
+    inline void setNewBenchmark( Benchmark *benchmark )
+    {
+        m_benchmark = benchmark;
+    }
+
+protected:
+    Benchmark *m_benchmark;
+    QRect m_rect;
+    QRect m_bounds;
+    bool m_screen_filled;
+};
+
+class FillRectBenchmark : public Benchmark
+{
+public:
+    FillRectBenchmark(int size)
+        : Benchmark(QSize(size, size))
+    {
+    }
+
+    void draw(QPainter *p, const QRect &rect, int iterationCount) override
+    {
+        p->fillRect(rect, randomColor(iterationCount));
+    }
+
+    QString name() const override
+    {
+        return QString::fromLatin1("fillRect(%1)").arg(m_size.width());
+    }
+};
+
+class ImageFillRectBenchmark : public Benchmark
+{
+public:
+    ImageFillRectBenchmark(int size)
+        : Benchmark(QSize(size, size))
+    {
+        int s = QRandomGenerator::global()->bounded(24) + 8;
+        m_content = QImage(s, s, QImage::Format_ARGB32_Premultiplied);
+        QPainter p(&m_content);
+        p.fillRect(0, 0, s, s, Qt::white);
+        p.fillRect(s/2, 0, s/2, s/2, Qt::gray);
+        p.fillRect(0, s/2, s/2, s/2, Qt::gray);
+        p.end();
+
+        m_brush = QBrush(m_content);
+    }
+
+    void draw(QPainter *p, const QRect &rect, int) override { p->fillRect(rect, m_brush); }
+
+    QString name() const override
+    {
+        return QString::fromLatin1("fillRect with image(%1)").arg(m_size.width());
+    }
+
+private:
+    QImage m_content;
+    QBrush m_brush;
+};
+
+
+class DrawRectBenchmark : public Benchmark
+{
+public:
+    DrawRectBenchmark(int size)
+        : Benchmark(QSize(size, size))
+    {
+    }
+
+    void begin(QPainter *p, int) override
+    {
+        p->setPen(Qt::NoPen);
+        p->setBrush(randomColor(m_size.width()));
+    }
+
+    void draw(QPainter *p, const QRect &rect, int) override { p->drawRect(rect); }
+
+    QString name() const override
+    {
+        return QString::fromLatin1("drawRect(%1)").arg(m_size.width());
+    }
+};
+
+
+class DrawRectWithBrushChangeBenchmark : public Benchmark
+{
+public:
+    DrawRectWithBrushChangeBenchmark(int size)
+        : Benchmark(QSize(size, size))
+    {
+    }
+
+    void begin(QPainter *p, int) override { p->setPen(Qt::NoPen); }
+
+    void draw(QPainter *p, const QRect &rect, int i) override
+    {
+        p->setBrush(randomColor(i));
+        p->drawRect(rect);
+    }
+
+    QString name() const override
+    {
+        return QString::fromLatin1("drawRect with brushchange(%1)").arg(m_size.width());
+    }
+};
+
+class RoundRectBenchmark : public Benchmark
+{
+public:
+    RoundRectBenchmark(int size)
+        : Benchmark(QSize(size, size))
+    {
+        m_roundness = size / 4.;
+    }
+
+    void begin(QPainter *p, int) override
+    {
+        p->setPen(Qt::NoPen);
+        p->setBrush(Qt::red);
+    }
+
+    void draw(QPainter *p, const QRect &rect, int) override
+    {
+        p->drawRoundedRect(rect, m_roundness, m_roundness);
+    }
+
+    QString name() const override
+    {
+        return QString::fromLatin1("drawRoundedRect(%1)").arg(m_size.width());
+    }
+
+    qreal m_roundness;
+};
+
+
+class ArcsBenchmark : public Benchmark
+{
+public:
+    enum Type {
+        Stroked         = 0x0001,
+        Filled          = 0x0002,
+
+        ArcShape        = 0x0010,
+        ChordShape      = 0x0020,
+        PieShape        = 0x0040,
+        CircleShape     = 0x0080,
+        Shapes          = 0x00f0
+
+    };
+
+    ArcsBenchmark(int size, uint type)
+        : Benchmark(QSize(size, size)),
+          m_type(type)
+    {
+    }
+
+    void begin(QPainter *p, int) override
+    {
+        if (m_type & Stroked)
+            p->setPen(Qt::black);
+        else
+            p->setPen(Qt::NoPen);
+
+        if (m_type & Filled)
+            p->setBrush(Qt::red);
+        else
+            p->setBrush(Qt::NoBrush);
+    }
+
+    void draw(QPainter *p, const QRect &rect, int) override
+    {
+        switch (m_type & Shapes) {
+        case ArcShape:
+            p->drawArc(rect, 45*16, 120*16);
+            break;
+        case ChordShape:
+            p->drawChord(rect, 45*16, 120*16);
+            break;
+        case PieShape:
+            p->drawPie(rect, 45*16, 120*16);
+            break;
+        case CircleShape:
+            p->drawEllipse(rect);
+            break;
+        }
+    }
+
+    QString name() const override
+    {
+        QString fillStroke;
+
+        if ((m_type & (Stroked|Filled)) == (Stroked|Filled)) {
+            fillStroke = QLatin1String("Fill & Outline");
+        } else if (m_type & Stroked) {
+            fillStroke = QLatin1String("Outline");
+        } else if (m_type & Filled) {
+            fillStroke = QLatin1String("Fill");
+        }
+
+        QString shape;
+        if (m_type & PieShape) shape = QLatin1String("drawPie");
+        else if (m_type & ChordShape) shape = QLatin1String("drawChord");
+        else if (m_type & ArcShape) shape = QLatin1String("drawArc");
+        else if (m_type & CircleShape) shape = QLatin1String("drawEllipse");
+
+        return QString::fromLatin1("%1(%2) %3").arg(shape).arg(m_size.width()).arg(fillStroke);
+    }
+
+    uint m_type;
+};
+
+
+class DrawScaledImage : public Benchmark
+{
+public:
+    DrawScaledImage(const QImage &image, qreal scale, bool asPixmap)
+        : Benchmark(QSize(image.width(), image.height())),
+          m_image(image),
+          m_type(asPixmap ? "Pixmap" : "Image"),
+          m_scale(scale),
+          m_as_pixmap(asPixmap)
+    {
+        m_pixmap = QPixmap::fromImage(m_image);
+    }
+    DrawScaledImage(const QString& type, const QPixmap &pixmap, qreal scale)
+        : Benchmark(QSize(pixmap.width(), pixmap.height())),
+          m_type(type),
+          m_scale(scale),
+          m_as_pixmap(true),
+          m_pixmap(pixmap)
+    {
+    }
+
+    void begin(QPainter *p, int) override { p->scale(m_scale, m_scale); }
+
+    void draw(QPainter *p, const QRect &rect, int) override
+    {
+        if (m_as_pixmap)
+            p->drawPixmap(rect.topLeft(), m_pixmap);
+        else
+            p->drawImage(rect.topLeft(), m_image);
+    }
+
+    QString name() const override
+    {
+        return QString::fromLatin1("draw%4(%1) at scale=%2, depth=%3")
+            .arg(m_size.width())
+            .arg(m_scale)
+            .arg(m_as_pixmap ? m_pixmap.depth() : m_image.depth())
+            .arg(m_type);
+    }
+
+private:
+    QImage m_image;
+    QString m_type;
+    qreal m_scale;
+    bool m_as_pixmap;
+    QPixmap m_pixmap;
+};
+
+class DrawTransformedImage : public Benchmark
+{
+public:
+    DrawTransformedImage(const QImage &image, bool asPixmap)
+        : Benchmark(QSize(image.width(), image.height())),
+          m_image(image),
+          m_type(asPixmap ? "Pixmap" : "Image"),
+          m_as_pixmap(asPixmap)
+    {
+        m_pixmap = QPixmap::fromImage(m_image);
+    }
+    DrawTransformedImage(const QString& type, const QPixmap &pixmap)
+        : Benchmark(QSize(pixmap.width(), pixmap.height())),
+          m_type(type),
+          m_as_pixmap(true),
+          m_pixmap(pixmap)
+    {
+    }
+
+    void draw(QPainter *p, const QRect &rect, int) override
+    {
+        QTransform oldTransform = p->transform();
+        p->translate(0.5 * rect.width() + rect.left(), 0.5 * rect.height() + rect.top());
+        p->shear(0.25, 0.0);
+        p->rotate(5.0);
+        if (m_as_pixmap)
+            p->drawPixmap(-0.5 * rect.width(), -0.5 * rect.height(), m_pixmap);
+        else
+            p->drawImage(-0.5 * rect.width(), -0.5 * rect.height(), m_image);
+        p->setTransform(oldTransform);
+    }
+
+    QString name() const override
+    {
+        return QString::fromLatin1("draw%3(%1) w/transform, depth=%2")
+            .arg(m_size.width())
+            .arg(m_as_pixmap ? m_pixmap.depth() : m_image.depth())
+            .arg(m_type);
+    }
+
+private:
+    QImage m_image;
+    QString m_type;
+    bool m_as_pixmap;
+    QPixmap m_pixmap;
+};
+
+
+class DrawImage : public Benchmark
+{
+public:
+    DrawImage(const QImage &image, bool asPixmap)
+        : Benchmark(QSize(image.width(), image.height())),
+          m_image(image),
+          m_type(asPixmap ? "Pixmap" : "Image"),
+          m_as_pixmap(asPixmap)
+    {
+        m_pixmap = QPixmap::fromImage(image);
+    }
+    DrawImage(const QString& type, const QPixmap &pixmap)
+        : Benchmark(QSize(pixmap.width(), pixmap.height())),
+          m_type(type),
+          m_as_pixmap(true),
+          m_pixmap(pixmap)
+    {
+    }
+
+    void draw(QPainter *p, const QRect &rect, int) override
+    {
+        if (m_as_pixmap)
+            p->drawPixmap(rect.topLeft(), m_pixmap);
+        else
+            p->drawImage(rect.topLeft(), m_image);
+    }
+
+    QString name() const override
+    {
+        return QString::fromLatin1("draw%2(%1), depth=%3")
+            .arg(m_size.width())
+            .arg(m_type)
+            .arg(m_as_pixmap ? m_pixmap.depth() : m_image.depth());
+    }
+
+private:
+    QImage m_image;
+    QString m_type;
+    bool m_as_pixmap;
+    QPixmap m_pixmap;
+};
+
+
+class DrawText : public Benchmark
+{
+public:
+    enum Mode {
+        PainterMode,
+        PainterQPointMode,
+        LayoutMode,
+        DocumentMode,
+        PixmapMode,
+        StaticTextMode,
+        StaticTextWithMaximumSizeMode,
+        StaticTextBackendOptimizations
+    };
+
+    DrawText(const QString &text, Mode mode)
+        : Benchmark(QSize()), m_mode(mode), m_text(text), m_document(text), m_layout(text)
+    {
+    }
+
+    void begin(QPainter *p, int iterations) override
+    {
+        m_staticTexts.clear();
+        m_currentStaticText = 0;
+        m_pixmaps.clear();
+        m_currentPixmap = 0;
+        QRect m_bounds = QRect(0,0,p->device()->width(), p->device()->height());
+        switch (m_mode) {
+        case PainterMode:
+            m_size = (p->boundingRect(m_bounds, 0, m_text)).size();
+//            m_rect = m_rect.translated(-m_rect.topLeft());
+            break;
+        case DocumentMode:
+            m_size = QSize(m_document.size().toSize());
+            break;
+        case PixmapMode:
+            for (int i=0; i<4; ++i) {
+                m_size = (p->boundingRect(m_bounds, 0, m_text)).size();
+                QPixmap pixmap = QPixmap(m_size);
+                pixmap.fill(Qt::transparent);
+                {
+                    QPainter p(&pixmap);
+                    p.drawText(pixmap.rect(), m_text);
+                }
+                m_pixmaps.append(pixmap);
+            }
+            break;
+
+        case LayoutMode: {
+            QRect r = p->boundingRect(m_bounds, 0, m_text);
+            QStringList lines = m_text.split('\n');
+            int height = 0;
+            int leading = p->fontMetrics().leading();
+            m_layout.beginLayout();
+            for (int i=0; i<lines.size(); ++i) {
+                QTextLine textLine = m_layout.createLine();
+                if (textLine.isValid()) {
+                    textLine.setLineWidth(r.width());
+                    textLine.setPosition(QPointF(0, height));
+                    height += leading + textLine.height();
+                }
+            }
+            m_layout.endLayout();
+            m_layout.setCacheEnabled(true);
+            m_size = m_layout.boundingRect().toRect().size();
+            break; }
+
+        case StaticTextWithMaximumSizeMode: {
+            QStaticText staticText;
+            m_size = (p->boundingRect(m_bounds, 0, m_text)).size();
+            staticText.setTextWidth(m_size.width() + 10);
+            staticText.setText(m_text);
+            staticText.prepare(p->transform(), p->font());
+            m_staticTexts.append(staticText);
+            break;
+        }
+        case StaticTextBackendOptimizations: {
+            m_size = (p->boundingRect(m_bounds, 0, m_text)).size();
+            for (int i=0; i<iterations; ++i) {
+                QStaticText staticText;
+                staticText.setPerformanceHint(QStaticText::AggressiveCaching);
+                staticText.setTextWidth(m_size.width() + 10);
+                staticText.setText(m_text);
+                staticText.prepare(p->transform(), p->font());
+                m_staticTexts.append(staticText);
+            }
+
+            break;
+        }
+        case StaticTextMode: {
+            QStaticText staticText;
+            staticText.setText(m_text);
+            staticText.prepare(p->transform(), p->font());
+            m_staticTexts.append(staticText);
+
+            QFontMetrics fm(p->font());
+            m_size = QSize(fm.horizontalAdvance(m_text, m_text.size()), fm.height());
+
+            break;
+        }
+        case PainterQPointMode: {
+            QFontMetrics fm(p->font());
+            m_size = QSize(fm.horizontalAdvance(m_text, m_text.size()), fm.height());
+            break;
+        }
+
+        }
+    }
+
+    void draw(QPainter *p, const QRect &rect, int) override
+    {
+        switch (m_mode) {
+        case PainterMode:
+            p->drawText(rect, 0, m_text);
+            break;
+        case PainterQPointMode:
+            p->drawText(rect.topLeft(), m_text);
+            break;
+        case PixmapMode:
+            p->drawPixmap(rect.topLeft(), m_pixmaps.at(m_currentPixmap));
+            m_currentPixmap = (m_currentPixmap + 1) % m_pixmaps.size();
+            break;
+        case DocumentMode:
+            p->translate(rect.topLeft());
+            m_document.drawContents(p);
+            p->translate(-rect.topLeft());
+            break;
+        case LayoutMode:
+            m_layout.draw(p, rect.topLeft());
+            break;
+        case StaticTextWithMaximumSizeMode:
+        case StaticTextMode:
+            p->drawStaticText(rect.topLeft(), m_staticTexts.at(0));
+            break;
+        case StaticTextBackendOptimizations:
+            p->drawStaticText(rect.topLeft(), m_staticTexts.at(m_currentStaticText));
+            m_currentStaticText = (m_currentStaticText + 1) % m_staticTexts.size();
+            break;
+        }
+    }
+
+    QString name() const override
+    {
+        int letters = m_text.size();
+        int lines = m_text.count('\n');
+        if (lines == 0)
+            lines = 1;
+        QString type;
+        switch (m_mode) {
+        case PainterMode: type = "drawText(rect)"; break;
+        case PainterQPointMode: type = "drawText(point)"; break;
+        case LayoutMode: type = "layout.draw()"; break;
+        case DocumentMode: type = "doc.drawContents()"; break;
+        case PixmapMode: type = "pixmap cached text"; break;
+        case StaticTextMode: type = "drawStaticText()"; break;
+        case StaticTextWithMaximumSizeMode: type = "drawStaticText() w/ maxsize"; break;
+        case StaticTextBackendOptimizations: type = "drawStaticText() w/ backend optimizations"; break;
+        }
+
+        return QString::fromLatin1("%3, len=%1, lines=%2")
+            .arg(letters)
+            .arg(lines)
+            .arg(type);
+    }
+
+private:
+    Mode m_mode;
+    QString m_text;
+    QTextDocument m_document;
+    QTextLayout m_layout;
+
+    QList<QPixmap> m_pixmaps;
+    int m_currentPixmap;
+
+    int m_currentStaticText;
+    QList<QStaticText> m_staticTexts;
+};
+
+class ClippedDrawRectBenchmark : public Benchmark
+{
+public:
+    enum ClipType {
+        RectClip,
+        TwoRectRegionClip,
+        EllipseRegionClip,
+        TwoRectPathClip,
+        EllipsePathClip,
+        AAEllipsePathClip,
+        EllipseRegionThenRectClip,
+        EllipsePathThenRectClip
+    };
+
+    ClippedDrawRectBenchmark(int size, ClipType type)
+        : Benchmark(QSize(size, size)), m_type(type)
+    {
+    }
+
+    void begin(QPainter *p, int) override
+    {
+        QRect m_bounds = QRect(0,0,p->device()->width(), p->device()->height());
+        p->setPen(Qt::NoPen);
+        p->setBrush(Qt::red);
+
+        switch (m_type) {
+        case RectClip:
+            p->setClipRect(m_bounds.adjusted(1, 1, -1, -1));
+            break;
+        case TwoRectRegionClip:
+            p->setClipRegion(QRegion(m_bounds.adjusted(0, 0, -1, -1))
+                             | QRegion(m_bounds.adjusted(1, 1, 0, 0)));
+            break;
+        case EllipseRegionClip:
+            p->setClipRegion(QRegion(m_bounds, QRegion::Ellipse));
+            break;
+        case TwoRectPathClip:
+            {
+                QPainterPath path;
+                path.addRect(m_bounds.adjusted(0, 0, -1, -1));
+                path.addRect(m_bounds.adjusted(1, 1, 0, 0));
+                path.setFillRule(Qt::WindingFill);
+                p->setClipPath(path);
+            }
+            break;
+        case EllipsePathClip:
+            {
+                QPainterPath path;
+                path.addEllipse(m_bounds);
+                p->setClipPath(path);
+            }
+            break;
+        case AAEllipsePathClip:
+            {
+                QPainterPath path;
+                path.addEllipse(m_bounds);
+                p->setRenderHint(QPainter::Antialiasing);
+                p->setClipPath(path);
+                p->setRenderHint(QPainter::Antialiasing, false);
+            }
+            break;
+        case EllipseRegionThenRectClip:
+            p->setClipRegion(QRegion(m_bounds, QRegion::Ellipse));
+            p->setClipRegion(QRegion(m_bounds.width() / 4,
+                                   m_bounds.height() / 4,
+                                   m_bounds.width() / 2,
+                                   m_bounds.height() / 2), Qt::IntersectClip);
+            break;
+        case EllipsePathThenRectClip:
+            {
+                QPainterPath path;
+                path.addEllipse(m_bounds);
+                p->setClipPath(path);
+                p->setClipRegion(QRegion(m_bounds.width() / 4,
+                                         m_bounds.height() / 4,
+                                         m_bounds.width() / 2,
+                                         m_bounds.height() / 2), Qt::IntersectClip);
+            }
+            break;
+        }
+    }
+
+    void draw(QPainter *p, const QRect &rect, int) override { p->drawRect(rect); }
+
+    QString name() const override
+    {
+        QString namedType;
+        switch (m_type) {
+        case RectClip:
+            namedType = "rect";
+            break;
+        case TwoRectRegionClip:
+            namedType = "two-rect-region";
+            break;
+        case EllipseRegionClip:
+            namedType = "ellipse-region";
+            break;
+        case TwoRectPathClip:
+            namedType = "two-rect-path";
+            break;
+        case EllipsePathClip:
+            namedType = "ellipse-path";
+            break;
+        case AAEllipsePathClip:
+            namedType = "aa-ellipse-path";
+            break;
+        case EllipseRegionThenRectClip:
+            namedType = "ellipseregion&rect";
+            break;
+        case EllipsePathThenRectClip:
+            namedType = "ellipsepath&rect";
+            break;
+        }
+        return QString::fromLatin1("%1-clipped-drawRect(%2)").arg(namedType).arg(m_size.width());
+    }
+
+    ClipType m_type;
+};
+
+class LinesBenchmark : public Benchmark
+{
+public:
+    enum LineType {
+        Horizontal_Integer,
+        Diagonal_Integer,
+        Vertical_Integer,
+        Horizontal_Float,
+        Diagonal_Float,
+        Vertical_Float
+    };
+
+    LinesBenchmark(int length, LineType type)
+        : Benchmark(QSize(qAbs(length), qAbs(length))),
+          m_type(type),
+          m_length(length)
+    {
+
+    }
+
+    void draw(QPainter *p, const QRect &rect, int) override
+    {
+        switch (m_type) {
+        case Horizontal_Integer:
+            p->drawLine(QLine(rect.x(), rect.y(), rect.x() + m_length, rect.y()));
+            break;
+        case Diagonal_Integer:
+            p->drawLine(QLine(rect.x(), rect.y(), rect.x() + m_length, rect.y() + m_length));
+            break;
+        case Vertical_Integer:
+            p->drawLine(QLine(rect.x() + 4, rect.y(), rect.x() + 4, rect.y() + m_length));
+            break;
+        case Horizontal_Float:
+            p->drawLine(QLineF(rect.x(), rect.y(), rect.x() + m_length, rect.y()));
+            break;
+        case Diagonal_Float:
+            p->drawLine(QLineF(rect.x(), rect.y(), rect.x() + m_length, rect.y() + m_length));
+            break;
+        case Vertical_Float:
+            p->drawLine(QLineF(rect.x() + 4, rect.y(), rect.x() + 4, rect.y() + m_length));
+            break;
+        }
+    }
+
+    QString name() const override
+    {
+        const char *names[] = {
+            "Hor_I",
+            "Diag_I",
+            "Ver_I",
+            "Hor_F",
+            "Diag_F",
+            "Ver_F"
+        };
+        return QString::fromLatin1("drawLine(size=%1,type=%2)").arg(m_length).arg(names[m_type]);
+    }
+
+    LineType m_type;
+    int m_length;
+};
+
+#endif // BENCHMARKTESTS_H

tests/benchmarks/gui/painting/qtbench/tst_qtbench.cpp

@@ -0,0 +1,214 @@
+// Copyright (C) 2020 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
+
+#include <qtest.h>
+
+#include <QtCore/qmath.h>
+#include <QtCore/QElapsedTimer>
+#include <QtWidgets/QWidget>
+
+#include "benchmarktests.h"
+
+class BenchWidget : public QWidget
+{
+public:
+    BenchWidget(Benchmark *benchmark);
+
+    void paintEvent(QPaintEvent *event) override;
+
+    bool done() const { return m_done; }
+    qreal result() const { return m_result; }
+
+public:
+    QElapsedTimer timer;
+
+    Benchmark *m_benchmark;
+
+    bool m_done;
+    qreal m_result;
+
+    uint m_total;
+    uint m_iteration;
+
+    QList<uint> iterationTimes;
+};
+
+void BenchWidget::paintEvent(QPaintEvent *)
+{
+    if (m_done)
+        return;
+
+    QPainter p(this);
+
+    m_benchmark->begin(&p, 100);
+
+    PaintingRectAdjuster adjuster;
+    adjuster.setNewBenchmark(m_benchmark);
+    adjuster.reset(rect());
+
+    for (int i = 0; i < 100; ++i)
+        m_benchmark->draw(&p, adjuster.newPaintingRect(), i);
+
+    m_benchmark->end(&p);
+
+    ++m_iteration;
+
+    uint currentElapsed = timer.isValid() ? timer.elapsed() : 0;
+    timer.restart();
+
+    m_total += currentElapsed;
+
+    // warm up for at most 5 iterations or half a second
+    if (m_iteration >= 5 || m_total >= 500) {
+        iterationTimes << currentElapsed;
+
+        if (iterationTimes.size() >= 5) {
+            qreal mean = 0;
+            qreal stddev = 0;
+            uint min = INT_MAX;
+
+            for (int i = 0; i < iterationTimes.size(); ++i) {
+                mean += iterationTimes.at(i);
+                min = qMin(min, iterationTimes.at(i));
+            }
+
+            mean /= qreal(iterationTimes.size());
+
+            for (int i = 0; i < iterationTimes.size(); ++i) {
+                qreal delta = iterationTimes.at(i) - mean;
+                stddev += delta * delta;
+            }
+
+            stddev = qSqrt(stddev / iterationTimes.size());
+
+            stddev = 100 * stddev / mean;
+            // do 50 iterations, break earlier if we spend more than 5 seconds or have a low std deviation after 2 seconds
+            if (iterationTimes.size() >= 50 || m_total >= 5000 || (m_total >= 2000 && stddev < 4)) {
+                m_result = min;
+                m_done = true;
+                return;
+            }
+        }
+    }
+}
+
+BenchWidget::BenchWidget(Benchmark *benchmark)
+    : m_benchmark(benchmark)
+    , m_done(false)
+    , m_result(0)
+    , m_total(0)
+    , m_iteration(0)
+{
+    setWindowTitle(benchmark->name());
+    resize(640, 480);
+}
+
+class tst_QtBench : public QObject
+{
+    Q_OBJECT
+
+private slots:
+    void qtBench();
+    void qtBench_data();
+};
+
+QString makeString(int length)
+{
+    const char chars[] = "abcd efgh ijkl mnop qrst uvwx yz!$. ABCD 1234";
+    const int len = int(strlen(chars));
+
+    QString ret;
+    for (int j = 0; j < length; j++) {
+        ret += QChar(chars[(j * 97) % len]);
+    }
+
+    return ret;
+}
+
+void tst_QtBench::qtBench_data()
+{
+    QTest::addColumn<void *>("benchmark");
+
+    QString shortString = makeString(5);
+    QString middleString = makeString(50);
+    QString longString = makeString(35) + "\n"
+                         + makeString(45) + "\n"
+                         + makeString(75);
+    QString superLongString = "Lorem ipsum dolor sit am\n"
+                              "et, consectetur adipisci\n"
+                              "ng elit. Integer mi leo,\n"
+                              "interdum ut congue at, p\n"
+                              "ulvinar et tellus. Quisq\n"
+                              "ue pretium eleifend laci\n"
+                              "nia. Ut semper gravida l\n"
+                              "ectus in commodo. Vestib\n"
+                              "ulum pharetra arcu in en\n"
+                              "im ultrices hendrerit. P\n"
+                              "ellentesque habitant mor\n"
+                              "bi tristique senectus et\n"
+                              "netus et malesuada fames\n"
+                              "ac turpis egestas. Ut er\n"
+                              "os sem, feugiat in eleme\n"
+                              "ntum in, porta sit amet \n"
+                              "neque. Fusce mi tellus, \n"
+                              "congue non dapibus eget,\n"
+                              "pharetra quis quam. Duis\n"
+                              "dui massa, pulvinar ac s\n"
+                              "odales pharetra, dictum \n"
+                              "in enim. Phasellus a nis\n"
+                              "i erat, sed pellentesque\n"
+                              "mi. Curabitur sed.";
+
+    QList<Benchmark *> benchmarks;
+    benchmarks << (new DrawText(shortString, DrawText::PainterMode));
+    benchmarks << (new DrawText(middleString, DrawText::PainterMode));
+    benchmarks << (new DrawText(longString, DrawText::PainterMode));
+    benchmarks << (new DrawText(superLongString, DrawText::PainterMode));
+
+    benchmarks << (new DrawText(shortString, DrawText::PainterQPointMode));
+    benchmarks << (new DrawText(middleString, DrawText::PainterQPointMode));
+    benchmarks << (new DrawText(longString, DrawText::PainterQPointMode));
+    benchmarks << (new DrawText(superLongString, DrawText::PainterQPointMode));
+
+    benchmarks << (new DrawText(shortString, DrawText::PixmapMode));
+    benchmarks << (new DrawText(middleString, DrawText::PixmapMode));
+    benchmarks << (new DrawText(longString, DrawText::PixmapMode));
+    benchmarks << (new DrawText(superLongString, DrawText::PixmapMode));
+
+    benchmarks << (new DrawText(shortString, DrawText::StaticTextMode));
+    benchmarks << (new DrawText(middleString, DrawText::StaticTextMode));
+    benchmarks << (new DrawText(longString, DrawText::StaticTextMode));
+    benchmarks << (new DrawText(superLongString, DrawText::StaticTextMode));
+
+    benchmarks << (new DrawText(shortString, DrawText::StaticTextWithMaximumSizeMode));
+    benchmarks << (new DrawText(middleString, DrawText::StaticTextWithMaximumSizeMode));
+    benchmarks << (new DrawText(longString, DrawText::StaticTextWithMaximumSizeMode));
+    benchmarks << (new DrawText(superLongString, DrawText::StaticTextWithMaximumSizeMode));
+
+    benchmarks << (new DrawText(shortString, DrawText::StaticTextBackendOptimizations));
+    benchmarks << (new DrawText(middleString, DrawText::StaticTextBackendOptimizations));
+    benchmarks << (new DrawText(longString, DrawText::StaticTextBackendOptimizations));
+    benchmarks << (new DrawText(superLongString, DrawText::StaticTextBackendOptimizations));
+
+    foreach (Benchmark *benchmark, benchmarks)
+        QTest::newRow(qPrintable(benchmark->name())) << reinterpret_cast<void *>(benchmark);
+}
+
+void tst_QtBench::qtBench()
+{
+    QFETCH(void *, benchmark);
+
+    BenchWidget widget(reinterpret_cast<Benchmark *>(benchmark));
+    widget.show();
+    QVERIFY(QTest::qWaitForWindowExposed(&widget));
+
+    while (!widget.done()) {
+        widget.update();
+        QApplication::processEvents();
+    }
+
+    QTest::setBenchmarkResult(widget.result(), QTest::WalltimeMilliseconds);
+}
+
+QTEST_MAIN(tst_QtBench)
+#include "tst_qtbench.moc"