qt 6.5.1 original

tests/benchmarks/widgets/graphicsview/qgraphicsview/CMakeLists.txt

@@ -0,0 +1,52 @@
+# Copyright (C) 2022 The Qt Company Ltd.
+# SPDX-License-Identifier: BSD-3-Clause
+
+#####################################################################
+## tst_bench_qgraphicsview Binary:
+#####################################################################
+
+qt_internal_add_benchmark(tst_bench_qgraphicsview
+    SOURCES
+        chiptester/chip.cpp chiptester/chip.h
+        chiptester/chiptester.cpp chiptester/chiptester.h
+        tst_qgraphicsview.cpp
+    LIBRARIES
+        Qt::Gui
+        Qt::Test
+        Qt::Widgets
+)
+
+# Resources:
+set(qgraphicsview_resource_files
+    "images/designer.png"
+    "images/wine-big.jpeg"
+    "images/wine.jpeg"
+    "random.data"
+)
+
+qt_internal_add_resource(tst_bench_qgraphicsview "qgraphicsview"
+    PREFIX
+        "/"
+    FILES
+        ${qgraphicsview_resource_files}
+)
+set(images_resource_files
+    "chiptester/qt4logo.png"
+)
+
+qt_internal_add_resource(tst_bench_qgraphicsview "images"
+    PREFIX
+        "/"
+    BASE
+        "chiptester"
+    FILES
+        ${images_resource_files}
+)
+
+## Scopes:
+#####################################################################
+
+qt_internal_extend_target(tst_bench_qgraphicsview CONDITION TARGET Qt::OpenGL
+    LIBRARIES
+        Qt::OpenGL
+)

tests/benchmarks/widgets/graphicsview/qgraphicsview/benchapps/chipTest/CMakeLists.txt

@@ -0,0 +1,42 @@
+# Copyright (C) 2022 The Qt Company Ltd.
+# SPDX-License-Identifier: BSD-3-Clause
+
+#####################################################################
+## chip Binary:
+#####################################################################
+
+qt_internal_add_benchmark(chip
+    GUI
+    SOURCES
+        chip.cpp chip.h
+        main.cpp
+        mainwindow.cpp mainwindow.h
+        view.cpp view.h
+    LIBRARIES
+        Qt::Gui
+)
+
+# Resources:
+set(images_resource_files
+    "fileprint.png"
+    "qt4logo.png"
+    "rotateleft.png"
+    "rotateright.png"
+    "zoomin.png"
+    "zoomout.png"
+)
+
+qt_internal_add_resource(chip "images"
+    PREFIX
+        "/"
+    FILES
+        ${images_resource_files}
+)
+
+## Scopes:
+#####################################################################
+
+qt_internal_extend_target(chip CONDITION TARGET Qt::OpenGL
+    LIBRARIES
+        Qt::OpenGL
+)

tests/benchmarks/widgets/graphicsview/qgraphicsview/benchapps/chipTest/chip.cpp

@@ -0,0 +1,139 @@
+// Copyright (C) 2016 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
+
+#include "chip.h"
+
+#include <QtGui>
+
+Chip::Chip(const QColor &color, int x, int y)
+{
+    this->x = x;
+    this->y = y;
+    this->color = color;
+    setZValue((x + y) % 2);
+
+    setFlags(ItemIsSelectable | ItemIsMovable);
+    setAcceptHoverEvents(true);
+}
+
+QRectF Chip::boundingRect() const
+{
+    return QRectF(0, 0, 110, 70);
+}
+
+QPainterPath Chip::shape() const
+{
+    QPainterPath path;
+    path.addRect(14, 14, 82, 42);
+    return path;
+}
+
+void Chip::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget)
+{
+    Q_UNUSED(widget);
+
+    QColor fillColor = (option->state & QStyle::State_Selected) ? color.dark(150) : color;
+    if (option->state & QStyle::State_MouseOver)
+        fillColor = fillColor.light(125);
+
+    const qreal lod = option->levelOfDetailFromTransform(painter->worldTransform());
+    if (lod < 0.2) {
+        if (lod < 0.125) {
+            painter->fillRect(QRectF(0, 0, 110, 70), fillColor);
+            return;
+        }
+
+        painter->setPen(QPen(Qt::black, 0));
+        painter->setBrush(fillColor);
+        painter->drawRect(13, 13, 97, 57);
+        return;
+    }
+
+    QPen oldPen = painter->pen();
+    QPen pen = oldPen;
+    int width = 0;
+    if (option->state & QStyle::State_Selected)
+        width += 2;
+
+    pen.setWidth(width);
+    painter->setBrush(QBrush(fillColor.dark(option->state & QStyle::State_Sunken ? 120 : 100)));
+
+    painter->drawRect(QRect(14, 14, 79, 39));
+    if (lod >= 1) {
+        painter->setPen(QPen(Qt::gray, 1));
+        painter->drawLine(15, 54, 94, 54);
+        painter->drawLine(94, 53, 94, 15);
+        painter->setPen(QPen(Qt::black, 0));
+    }
+
+    // Draw text
+    if (lod >= 2) {
+        QFont font("Times", 10);
+        font.setStyleStrategy(QFont::ForceOutline);
+        painter->setFont(font);
+        painter->save();
+        painter->scale(0.1, 0.1);
+        painter->drawText(170, 180, QString("Model: VSC-2000 (Very Small Chip) at %1x%2").arg(x).arg(y));
+        painter->drawText(170, 200, QString("Serial number: DLWR-WEER-123L-ZZ33-SDSJ"));
+        painter->drawText(170, 220, QString("Manufacturer: Chip Manufacturer"));
+        painter->restore();
+    }
+
+    // Draw lines
+    QVarLengthArray<QLineF, 36> lines;
+    if (lod >= 0.5) {
+        for (int i = 0; i <= 10; i += (lod > 0.5 ? 1 : 2)) {
+            lines.append(QLineF(18 + 7 * i, 13, 18 + 7 * i, 5));
+            lines.append(QLineF(18 + 7 * i, 54, 18 + 7 * i, 62));
+        }
+        for (int i = 0; i <= 6; i += (lod > 0.5 ? 1 : 2)) {
+            lines.append(QLineF(5, 18 + i * 5, 13, 18 + i * 5));
+            lines.append(QLineF(94, 18 + i * 5, 102, 18 + i * 5));
+        }
+    }
+    if (lod >= 0.4) {
+        const QLineF lineData[] = {
+            QLineF(25, 35, 35, 35),
+            QLineF(35, 30, 35, 40),
+            QLineF(35, 30, 45, 35),
+            QLineF(35, 40, 45, 35),
+            QLineF(45, 30, 45, 40),
+            QLineF(45, 35, 55, 35)
+        };
+        lines.append(lineData, 6);
+    }
+    painter->drawLines(lines.data(), lines.size());
+
+    // Draw red ink
+    if (stuff.size() > 1) {
+        painter->setPen(QPen(Qt::red, 1, Qt::SolidLine, Qt::RoundCap, Qt::RoundJoin));
+        painter->setBrush(Qt::NoBrush);
+        QPainterPath path;
+        path.moveTo(stuff.first());
+        for (int i = 1; i < stuff.size(); ++i)
+            path.lineTo(stuff.at(i));
+        painter->drawPath(path);
+    }
+}
+
+void Chip::mousePressEvent(QGraphicsSceneMouseEvent *event)
+{
+    QGraphicsItem::mousePressEvent(event);
+    update();
+}
+
+void Chip::mouseMoveEvent(QGraphicsSceneMouseEvent *event)
+{
+    if (event->modifiers() & Qt::ShiftModifier) {
+        stuff << event->pos();
+        update();
+        return;
+    }
+    QGraphicsItem::mouseMoveEvent(event);
+}
+
+void Chip::mouseReleaseEvent(QGraphicsSceneMouseEvent *event)
+{
+    QGraphicsItem::mouseReleaseEvent(event);
+    update();
+}

tests/benchmarks/widgets/graphicsview/qgraphicsview/benchapps/chipTest/chip.h

@@ -0,0 +1,30 @@
+// 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 CHIP_H
+#define CHIP_H
+
+#include <QtGui/QColor>
+#include <QtGui/QGraphicsItem>
+
+class Chip : public QGraphicsItem
+{
+public:
+    Chip(const QColor &color, int x, int y);
+
+    QRectF boundingRect() const;
+    QPainterPath shape() const;
+    void paint(QPainter *painter, const QStyleOptionGraphicsItem *item, QWidget *widget);
+
+protected:
+    void mousePressEvent(QGraphicsSceneMouseEvent *event);
+    void mouseMoveEvent(QGraphicsSceneMouseEvent *event);
+    void mouseReleaseEvent(QGraphicsSceneMouseEvent *event);
+
+private:
+    int x, y;
+    QColor color;
+    QList<QPointF> stuff;
+};
+
+#endif

tests/benchmarks/widgets/graphicsview/qgraphicsview/benchapps/chipTest/images.qrc

@@ -0,0 +1,10 @@
+<!DOCTYPE RCC><RCC version="1.0">
+<qresource>
+    <file>qt4logo.png</file>
+    <file>zoomin.png</file>
+    <file>zoomout.png</file>
+    <file>rotateleft.png</file>
+    <file>rotateright.png</file>
+    <file>fileprint.png</file>
+</qresource>
+</RCC>

tests/benchmarks/widgets/graphicsview/qgraphicsview/benchapps/chipTest/main.cpp

@@ -0,0 +1,19 @@
+// Copyright (C) 2016 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
+
+#include "mainwindow.h"
+
+#include <QApplication>
+
+int main(int argc, char **argv)
+{
+    Q_INIT_RESOURCE(images);
+
+    QApplication app(argc, argv);
+    app.setAttribute(Qt::AA_DontCreateNativeWidgetSiblings);
+
+    MainWindow window;
+    window.show();
+
+    return app.exec();
+}

tests/benchmarks/widgets/graphicsview/qgraphicsview/benchapps/chipTest/mainwindow.cpp

@@ -0,0 +1,49 @@
+// Copyright (C) 2016 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
+
+#include "mainwindow.h"
+#include "view.h"
+#include "chip.h"
+
+#include <QtGui>
+
+MainWindow::MainWindow(QWidget *parent)
+    : QWidget(parent)
+{
+    populateScene();
+
+    View *view = new View("Top left view");
+    view->view()->setScene(scene);
+    QHBoxLayout *layout = new QHBoxLayout;
+    layout->addWidget(view);
+    setLayout(layout);
+
+    setWindowTitle(tr("Chip Example"));
+}
+
+void MainWindow::populateScene()
+{
+    scene = new QGraphicsScene;
+
+    QImage image(":/qt4logo.png");
+
+    // Populate scene
+    int xx = 0;
+    int nitems = 0;
+    for (int i = -11000; i < 11000; i += 110) {
+        ++xx;
+        int yy = 0;
+        for (int j = -7000; j < 7000; j += 70) {
+            ++yy;
+            qreal x = (i + 11000) / 22000.0;
+            qreal y = (j + 7000) / 14000.0;
+
+            QColor color(image.pixel(int(image.width() * x), int(image.height() * y)));
+            QGraphicsItem *item = new Chip(color, xx, yy);
+            item->setPos(QPointF(i, j));
+            scene->addItem(item);
+
+            ++nitems;
+        }
+    }
+}

tests/benchmarks/widgets/graphicsview/qgraphicsview/benchapps/chipTest/mainwindow.h

@@ -0,0 +1,28 @@
+// 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 MAINWINDOW_H
+#define MAINWINDOW_H
+
+#include <QtGui/qwidget.h>
+
+QT_FORWARD_DECLARE_CLASS(QGraphicsScene)
+QT_FORWARD_DECLARE_CLASS(QGraphicsView)
+QT_FORWARD_DECLARE_CLASS(QLabel)
+QT_FORWARD_DECLARE_CLASS(QSlider)
+QT_FORWARD_DECLARE_CLASS(QSplitter)
+
+class MainWindow : public QWidget
+{
+    Q_OBJECT
+public:
+    MainWindow(QWidget *parent = nullptr);
+
+private:
+    void setupMatrix();
+    void populateScene();
+
+    QGraphicsScene *scene;
+};
+
+#endif

tests/benchmarks/widgets/graphicsview/qgraphicsview/benchapps/chipTest/view.cpp

@@ -0,0 +1,221 @@
+// Copyright (C) 2016 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
+
+#include "view.h"
+
+#include <QtGui>
+
+#include "valgrind/callgrind.h"
+
+#ifndef QT_NO_OPENGL
+#include <QtOpenGL>
+#endif
+
+#include <qmath.h>
+
+class CountView : public QGraphicsView
+{
+protected:
+    void paintEvent(QPaintEvent *event)
+    {
+        static int n = 0;
+        if (n)
+            CALLGRIND_START_INSTRUMENTATION
+        QGraphicsView::paintEvent(event);
+        if (n)
+            CALLGRIND_STOP_INSTRUMENTATION
+        if (++n == 500)
+            qApp->quit();
+    }
+};
+
+View::View(const QString &name, QWidget *parent)
+    : QFrame(parent)
+{
+    setFrameStyle(Sunken | StyledPanel);
+    graphicsView = new CountView;
+    graphicsView->setRenderHint(QPainter::Antialiasing, false);
+    graphicsView->setDragMode(QGraphicsView::RubberBandDrag);
+    graphicsView->setViewportUpdateMode(QGraphicsView::SmartViewportUpdate);
+
+    int size = style()->pixelMetric(QStyle::PM_ToolBarIconSize);
+    QSize iconSize(size, size);
+
+    QToolButton *zoomInIcon = new QToolButton;
+    zoomInIcon->setAutoRepeat(true);
+    zoomInIcon->setAutoRepeatInterval(33);
+    zoomInIcon->setAutoRepeatDelay(0);
+    zoomInIcon->setIcon(QPixmap(":/zoomin.png"));
+    zoomInIcon->setIconSize(iconSize);
+    QToolButton *zoomOutIcon = new QToolButton;
+    zoomOutIcon->setAutoRepeat(true);
+    zoomOutIcon->setAutoRepeatInterval(33);
+    zoomOutIcon->setAutoRepeatDelay(0);
+    zoomOutIcon->setIcon(QPixmap(":/zoomout.png"));
+    zoomOutIcon->setIconSize(iconSize);
+    zoomSlider = new QSlider;
+    zoomSlider->setMinimum(0);
+    zoomSlider->setMaximum(500);
+    zoomSlider->setValue(250);
+    zoomSlider->setTickPosition(QSlider::TicksRight);
+
+    // Zoom slider layout
+    QVBoxLayout *zoomSliderLayout = new QVBoxLayout;
+    zoomSliderLayout->addWidget(zoomInIcon);
+    zoomSliderLayout->addWidget(zoomSlider);
+    zoomSliderLayout->addWidget(zoomOutIcon);
+
+    QToolButton *rotateLeftIcon = new QToolButton;
+    rotateLeftIcon->setIcon(QPixmap(":/rotateleft.png"));
+    rotateLeftIcon->setIconSize(iconSize);
+    QToolButton *rotateRightIcon = new QToolButton;
+    rotateRightIcon->setIcon(QPixmap(":/rotateright.png"));
+    rotateRightIcon->setIconSize(iconSize);
+    rotateSlider = new QSlider;
+    rotateSlider->setOrientation(Qt::Horizontal);
+    rotateSlider->setMinimum(-360);
+    rotateSlider->setMaximum(360);
+    rotateSlider->setValue(0);
+    rotateSlider->setTickPosition(QSlider::TicksBelow);
+
+    // Rotate slider layout
+    QHBoxLayout *rotateSliderLayout = new QHBoxLayout;
+    rotateSliderLayout->addWidget(rotateLeftIcon);
+    rotateSliderLayout->addWidget(rotateSlider);
+    rotateSliderLayout->addWidget(rotateRightIcon);
+
+    resetButton = new QToolButton;
+    resetButton->setText(tr("0"));
+    resetButton->setEnabled(false);
+
+    // Label layout
+    QHBoxLayout *labelLayout = new QHBoxLayout;
+    label = new QLabel(name);
+    antialiasButton = new QToolButton;
+    antialiasButton->setText(tr("Antialiasing"));
+    antialiasButton->setCheckable(true);
+    antialiasButton->setChecked(false);
+    openGlButton = new QToolButton;
+    openGlButton->setText(tr("OpenGL"));
+    openGlButton->setCheckable(true);
+#ifndef QT_NO_OPENGL
+    openGlButton->setEnabled(QGLFormat::hasOpenGL());
+#else
+    openGlButton->setEnabled(false);
+#endif
+    printButton = new QToolButton;
+    printButton->setIcon(QIcon(QPixmap(":/fileprint.png")));
+
+    labelLayout->addWidget(label);
+    labelLayout->addStretch();
+    labelLayout->addWidget(antialiasButton);
+    labelLayout->addWidget(openGlButton);
+    labelLayout->addWidget(printButton);
+
+    QGridLayout *topLayout = new QGridLayout;
+    topLayout->addLayout(labelLayout, 0, 0);
+    topLayout->addWidget(graphicsView, 1, 0);
+    topLayout->addLayout(zoomSliderLayout, 1, 1);
+    topLayout->addLayout(rotateSliderLayout, 2, 0);
+    topLayout->addWidget(resetButton, 2, 1);
+    setLayout(topLayout);
+
+    connect(resetButton, SIGNAL(clicked()), this, SLOT(resetView()));
+    connect(zoomSlider, SIGNAL(valueChanged(int)), this, SLOT(setupMatrix()));
+    connect(rotateSlider, SIGNAL(valueChanged(int)), this, SLOT(setupMatrix()));
+    connect(graphicsView->verticalScrollBar(), SIGNAL(valueChanged(int)), this, SLOT(setResetButtonEnabled()));
+    connect(graphicsView->horizontalScrollBar(), SIGNAL(valueChanged(int)), this, SLOT(setResetButtonEnabled()));
+    connect(antialiasButton, SIGNAL(toggled(bool)), this, SLOT(toggleAntialiasing()));
+    connect(openGlButton, SIGNAL(toggled(bool)), this, SLOT(toggleOpenGL()));
+    connect(rotateLeftIcon, SIGNAL(clicked()), this, SLOT(rotateLeft()));
+    connect(rotateRightIcon, SIGNAL(clicked()), this, SLOT(rotateRight()));
+    connect(zoomInIcon, SIGNAL(clicked()), this, SLOT(zoomIn()));
+    connect(zoomOutIcon, SIGNAL(clicked()), this, SLOT(zoomOut()));
+    connect(printButton, SIGNAL(clicked()), this, SLOT(print()));
+
+    setupMatrix();
+
+    startTimer(0);
+}
+
+QGraphicsView *View::view() const
+{
+    return graphicsView;
+}
+
+void View::resetView()
+{
+    zoomSlider->setValue(250);
+    rotateSlider->setValue(0);
+    setupMatrix();
+    graphicsView->ensureVisible(QRectF(0, 0, 0, 0));
+
+    resetButton->setEnabled(false);
+}
+
+void View::setResetButtonEnabled()
+{
+    resetButton->setEnabled(true);
+}
+
+void View::setupMatrix()
+{
+    qreal scale = qPow(qreal(2), (zoomSlider->value() - 250) / qreal(50));
+
+    QTransform matrix;
+    matrix.scale(scale, scale);
+    matrix.rotate(rotateSlider->value());
+
+    graphicsView->setMatrix(matrix);
+    setResetButtonEnabled();
+}
+
+void View::toggleOpenGL()
+{
+#ifndef QT_NO_OPENGL
+    graphicsView->setViewport(openGlButton->isChecked() ? new QGLWidget(QGLFormat(QGL::SampleBuffers)) : new QWidget);
+#endif
+}
+
+void View::toggleAntialiasing()
+{
+    graphicsView->setRenderHint(QPainter::Antialiasing, antialiasButton->isChecked());
+}
+
+void View::print()
+{
+#ifndef QT_NO_PRINTER
+    QPrinter printer;
+    QPrintDialog dialog(&printer, this);
+    if (dialog.exec() == QDialog::Accepted) {
+        QPainter painter(&printer);
+        graphicsView->render(&painter);
+    }
+#endif
+}
+
+void View::zoomIn()
+{
+    zoomSlider->setValue(zoomSlider->value() + 1);
+}
+
+void View::zoomOut()
+{
+    zoomSlider->setValue(zoomSlider->value() - 1);
+}
+
+void View::rotateLeft()
+{
+    rotateSlider->setValue(rotateSlider->value() - 10);
+}
+
+void View::rotateRight()
+{
+    rotateSlider->setValue(rotateSlider->value() + 10);
+}
+
+void View::timerEvent(QTimerEvent *)
+{
+    graphicsView->horizontalScrollBar()->setValue(graphicsView->horizontalScrollBar()->value() + 1);
+}
+

tests/benchmarks/widgets/graphicsview/qgraphicsview/benchapps/chipTest/view.h

@@ -0,0 +1,48 @@
+// 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 VIEW_H
+#define VIEW_H
+
+#include <QFrame>
+
+QT_FORWARD_DECLARE_CLASS(QGraphicsView)
+QT_FORWARD_DECLARE_CLASS(QLabel)
+QT_FORWARD_DECLARE_CLASS(QSlider)
+QT_FORWARD_DECLARE_CLASS(QToolButton)
+
+class View : public QFrame
+{
+    Q_OBJECT
+public:
+    View(const QString &name, QWidget *parent = nullptr);
+
+    QGraphicsView *view() const;
+
+private slots:
+    void resetView();
+    void setResetButtonEnabled();
+    void setupMatrix();
+    void toggleOpenGL();
+    void toggleAntialiasing();
+    void print();
+
+    void zoomIn();
+    void zoomOut();
+    void rotateLeft();
+    void rotateRight();
+
+    void timerEvent(QTimerEvent *);
+
+private:
+    QGraphicsView *graphicsView;
+    QLabel *label;
+    QToolButton *openGlButton;
+    QToolButton *antialiasButton;
+    QToolButton *printButton;
+    QToolButton *resetButton;
+    QSlider *zoomSlider;
+    QSlider *rotateSlider;
+};
+
+#endif

tests/benchmarks/widgets/graphicsview/qgraphicsview/benchapps/moveItems/CMakeLists.txt

@@ -0,0 +1,14 @@
+# Copyright (C) 2022 The Qt Company Ltd.
+# SPDX-License-Identifier: BSD-3-Clause
+
+#####################################################################
+## moveItems Binary:
+#####################################################################
+
+qt_internal_add_benchmark(moveItems
+    GUI
+    SOURCES
+        main.cpp
+    LIBRARIES
+        Qt::Gui
+)

tests/benchmarks/widgets/graphicsview/qgraphicsview/benchapps/moveItems/main.cpp

@@ -0,0 +1,62 @@
+// Copyright (C) 2016 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
+#include <QtGui>
+
+#include "valgrind/callgrind.h"
+
+class View : public QGraphicsView
+{
+    Q_OBJECT
+public:
+    View(QGraphicsScene *scene, QGraphicsItem *item)
+        : QGraphicsView(scene), _item(item)
+    {
+    }
+
+protected:
+    void paintEvent(QPaintEvent *event)
+    {
+        static int n = 0;
+        if (n)
+            CALLGRIND_START_INSTRUMENTATION
+        QGraphicsView::paintEvent(event);
+        _item->moveBy(1, 1);
+        if (n)
+            CALLGRIND_STOP_INSTRUMENTATION
+        if (++n == 200)
+            qApp->quit();
+    }
+
+private:
+    QGraphicsItem *_item;
+};
+
+int main(int argc, char *argv[])
+{
+    QApplication app(argc, argv);
+
+    if (argc < 2) {
+        qDebug("usage: ./%s <numItems>", argv[0]);
+        return 1;
+    }
+
+    QGraphicsScene scene(-150, -150, 300, 300);
+    scene.setItemIndexMethod(QGraphicsScene::NoIndex);
+
+    QGraphicsRectItem *item = scene.addRect(-50, -50, 100, 100, QPen(Qt::NoPen), QBrush(Qt::blue));
+    item->setFlag(QGraphicsItem::ItemIsMovable);
+
+    for (int i = 0; i < atoi(argv[1]); ++i) {
+        QGraphicsRectItem *child = scene.addRect(-5, -5, 10, 10, QPen(Qt::NoPen), QBrush(Qt::blue));
+        child->setPos(-50 + QRandomGenerator::global()->bounded(100), -50 + QRandomGenerator::global()->bounded(100));
+        child->setParentItem(item);
+    }
+
+    View view(&scene, item);
+    view.resize(300, 300);
+    view.show();
+
+    return app.exec();
+}
+
+#include "main.moc"

tests/benchmarks/widgets/graphicsview/qgraphicsview/benchapps/scrolltest/CMakeLists.txt

@@ -0,0 +1,14 @@
+# Copyright (C) 2022 The Qt Company Ltd.
+# SPDX-License-Identifier: BSD-3-Clause
+
+#####################################################################
+## scrolltest Binary:
+#####################################################################
+
+qt_internal_add_benchmark(scrolltest
+    GUI
+    SOURCES
+        main.cpp
+    LIBRARIES
+        Qt::Gui
+)

tests/benchmarks/widgets/graphicsview/qgraphicsview/benchapps/scrolltest/main.cpp

@@ -0,0 +1,109 @@
+// Copyright (C) 2016 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
+#include <QtGui>
+
+#include "valgrind/callgrind.h"
+
+class ItemMover : public QObject
+{
+    Q_OBJECT
+public:
+    ItemMover(QGraphicsItem *item)
+        : _item(item)
+    {
+        startTimer(0);
+    }
+
+protected:
+    void timerEvent(QTimerEvent *event)
+    {
+        _item->moveBy(-1, 0);
+    }
+
+private:
+    QGraphicsItem *_item;
+};
+
+class ClipItem : public QGraphicsRectItem
+{
+public:
+    ClipItem(qreal x, qreal y, qreal w, qreal h, const QPen &pen, const QBrush &brush)
+        : QGraphicsRectItem(x, y, w, h)
+    {
+        setPen(pen);
+        setBrush(brush);
+    }
+
+    QPainterPath shape() const
+    {
+        QPainterPath path;
+        path.addRect(rect());
+        return path;
+    }
+};
+
+class CountView : public QGraphicsView
+{
+protected:
+    void paintEvent(QPaintEvent *event)
+    {
+        static int n = 0;
+        if (n)
+            CALLGRIND_START_INSTRUMENTATION
+        QGraphicsView::paintEvent(event);
+        if (n)
+            CALLGRIND_STOP_INSTRUMENTATION
+        if (++n == 500)
+            qApp->quit();
+    }
+};
+
+int main(int argc, char *argv[])
+{
+    QApplication app(argc, argv);
+
+    QGraphicsScene scene;
+    scene.setItemIndexMethod(QGraphicsScene::NoIndex);
+
+    ClipItem *clipItem = new ClipItem(0, 0, 100, 100, QPen(), QBrush(Qt::blue));
+    clipItem->setFlag(QGraphicsItem::ItemClipsChildrenToShape);
+    clipItem->setData(0, "clipItem");
+    scene.addItem(clipItem);
+
+    QGraphicsRectItem *scrollItem = scene.addRect(0, 0, 10, 10, QPen(Qt::NoPen), QBrush(Qt::NoBrush));
+    scrollItem->setParentItem(clipItem);
+    scrollItem->setFlag(QGraphicsItem::ItemIsMovable);
+    scrollItem->setData(0, "scrollItem");
+
+    for (int y = 0; y < 25; ++y) {
+        for (int x = 0; x < 25; ++x) {
+            ClipItem *rect = new ClipItem(0, 0, 90, 20, QPen(Qt::NoPen), QBrush(Qt::green));
+            rect->setParentItem(scrollItem);
+            rect->setPos(x * 95, y * 25);
+            rect->setData(0, qPrintable(QString("rect %1 %2").arg(x).arg(y)));
+            rect->setFlag(QGraphicsItem::ItemClipsChildrenToShape);
+
+            QGraphicsEllipseItem *ellipse = new QGraphicsEllipseItem(-5, -5, 10, 10);
+            ellipse->setPen(QPen(Qt::NoPen));
+            ellipse->setBrush(QBrush(Qt::yellow));
+            ellipse->setParentItem(rect);
+            ellipse->setData(0, qPrintable(QString("ellipse %1 %2").arg(x).arg(y)));
+        }
+    }
+
+    scrollItem->setRect(scrollItem->childrenBoundingRect());
+
+#if 0
+    ItemMover mover(scrollItem);
+#endif
+
+    CountView view;
+    view.setScene(&scene);
+    view.setSceneRect(-25, -25, 150, 150);
+    view.resize(300, 300);
+    view.show();
+
+    return app.exec();
+}
+
+#include "main.moc"

tests/benchmarks/widgets/graphicsview/qgraphicsview/chiptester/chip.cpp

@@ -0,0 +1,145 @@
+// Copyright (C) 2016 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
+
+#include "chip.h"
+
+#include <QtWidgets>
+
+Chip::Chip(const QColor &color, int x, int y)
+{
+    this->x = x;
+    this->y = y;
+    this->color = color;
+    setZValue((x + y) % 2);
+
+    setFlags(ItemIsSelectable | ItemIsMovable);
+    setAcceptHoverEvents(true);
+}
+
+QRectF Chip::boundingRect() const
+{
+    return QRectF(0, 0, 110, 70);
+}
+
+QPainterPath Chip::shape() const
+{
+    QPainterPath path;
+    path.addRect(14, 14, 82, 42);
+    return path;
+}
+
+void Chip::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget)
+{
+    Q_UNUSED(widget);
+
+    QColor fillColor = (option->state & QStyle::State_Selected) ? color.darker(150) : color;
+    if (option->state & QStyle::State_MouseOver)
+        fillColor = fillColor.lighter(125);
+
+    const qreal lod = option->levelOfDetailFromTransform(painter->worldTransform());
+    if (lod < 0.2) {
+        if (lod < 0.125) {
+            painter->fillRect(QRectF(0, 0, 110, 70), fillColor);
+            return;
+        }
+
+        QBrush b = painter->brush();
+        painter->setBrush(fillColor);
+        painter->drawRect(13, 13, 97, 57);
+        painter->setBrush(b);
+        return;
+    }
+
+    QPen oldPen = painter->pen();
+    QPen pen = oldPen;
+    int width = 0;
+    if (option->state & QStyle::State_Selected)
+        width += 2;
+
+    pen.setWidth(width);
+    QBrush b = painter->brush();
+    painter->setBrush(QBrush(fillColor.darker(option->state & QStyle::State_Sunken ? 120 : 100)));
+
+    painter->drawRect(QRect(14, 14, 79, 39));
+    painter->setBrush(b);
+
+    if (lod >= 1) {
+        painter->setPen(QPen(Qt::gray, 1));
+        painter->drawLine(15, 54, 94, 54);
+        painter->drawLine(94, 53, 94, 15);
+        painter->setPen(QPen(Qt::black, 0));
+    }
+
+    // Draw text
+    if (lod >= 2) {
+        QFont font(QStringList{"Times"}, 10);
+        font.setStyleStrategy(QFont::ForceOutline);
+        painter->setFont(font);
+        painter->save();
+        painter->scale(0.1, 0.1);
+        painter->drawText(170, 180, QString("Model: VSC-2000 (Very Small Chip) at %1x%2").arg(x).arg(y));
+        painter->drawText(170, 200, QString("Serial number: DLWR-WEER-123L-ZZ33-SDSJ"));
+        painter->drawText(170, 220, QString("Manufacturer: Chip Manufacturer"));
+        painter->restore();
+    }
+
+    // Draw lines
+    QVarLengthArray<QLineF, 36> lines;
+    if (lod >= 0.5) {
+        for (int i = 0; i <= 10; i += (lod > 0.5 ? 1 : 2)) {
+            lines.append(QLineF(18 + 7 * i, 13, 18 + 7 * i, 5));
+            lines.append(QLineF(18 + 7 * i, 54, 18 + 7 * i, 62));
+        }
+        for (int i = 0; i <= 6; i += (lod > 0.5 ? 1 : 2)) {
+            lines.append(QLineF(5, 18 + i * 5, 13, 18 + i * 5));
+            lines.append(QLineF(94, 18 + i * 5, 102, 18 + i * 5));
+        }
+    }
+    if (lod >= 0.4) {
+        const QLineF lineData[] = {
+            QLineF(25, 35, 35, 35),
+            QLineF(35, 30, 35, 40),
+            QLineF(35, 30, 45, 35),
+            QLineF(35, 40, 45, 35),
+            QLineF(45, 30, 45, 40),
+            QLineF(45, 35, 55, 35)
+        };
+        lines.append(lineData, 6);
+    }
+    painter->drawLines(lines.data(), lines.size());
+
+    // Draw red ink
+    if (stuff.size() > 1) {
+        QPen p = painter->pen();
+        painter->setPen(QPen(Qt::red, 1, Qt::SolidLine, Qt::RoundCap, Qt::RoundJoin));
+        painter->setBrush(Qt::NoBrush);
+        QPainterPath path;
+        path.moveTo(stuff.first());
+        for (int i = 1; i < stuff.size(); ++i)
+            path.lineTo(stuff.at(i));
+        painter->drawPath(path);
+        painter->setPen(p);
+    }
+}
+
+void Chip::mousePressEvent(QGraphicsSceneMouseEvent *event)
+{
+    QGraphicsItem::mousePressEvent(event);
+    update();
+}
+
+void Chip::mouseMoveEvent(QGraphicsSceneMouseEvent *event)
+{
+    if (event->modifiers() & Qt::ShiftModifier) {
+        stuff << event->pos();
+        update();
+        return;
+    }
+    QGraphicsItem::mouseMoveEvent(event);
+}
+
+void Chip::mouseReleaseEvent(QGraphicsSceneMouseEvent *event)
+{
+    QGraphicsItem::mouseReleaseEvent(event);
+    update();
+}

tests/benchmarks/widgets/graphicsview/qgraphicsview/chiptester/chip.h

@@ -0,0 +1,30 @@
+// 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 CHIP_H
+#define CHIP_H
+
+#include <QtGui/QColor>
+#include <QtWidgets/QGraphicsItem>
+
+class Chip : public QGraphicsItem
+{
+public:
+    Chip(const QColor &color, int x, int y);
+
+    QRectF boundingRect() const override;
+    QPainterPath shape() const override;
+    void paint(QPainter *painter, const QStyleOptionGraphicsItem *item, QWidget *widget) override;
+
+protected:
+    void mousePressEvent(QGraphicsSceneMouseEvent *event) override;
+    void mouseMoveEvent(QGraphicsSceneMouseEvent *event) override;
+    void mouseReleaseEvent(QGraphicsSceneMouseEvent *event) override;
+
+private:
+    int x, y;
+    QColor color;
+    QList<QPointF> stuff;
+};
+
+#endif

tests/benchmarks/widgets/graphicsview/qgraphicsview/chiptester/chiptester.cpp

@@ -0,0 +1,99 @@
+// 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 "chiptester.h"
+#include "chip.h"
+
+#include <QtGui>
+#include <QScrollBar>
+#ifndef QT_NO_OPENGL
+#include <QtOpenGL>
+#endif
+
+ChipTester::ChipTester(QWidget *parent)
+    : QGraphicsView(parent),
+      npaints(0)
+{
+    resize(400, 300);
+    setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
+    setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
+    setFrameStyle(0);
+    setTransformationAnchor(NoAnchor);
+
+    populateScene();
+    setScene(scene);
+
+    setWindowTitle(tr("Chip Example"));
+}
+
+void ChipTester::setAntialias(bool enabled)
+{
+    setRenderHint(QPainter::Antialiasing, enabled);
+}
+
+void ChipTester::setOperation(Operation operation)
+{
+    this->operation = operation;
+}
+
+void ChipTester::runBenchmark()
+{
+    npaints = 0;
+    timerId = startTimer(0);
+    eventLoop.exec();
+    killTimer(timerId);
+}
+
+void ChipTester::paintEvent(QPaintEvent *event)
+{
+    QGraphicsView::paintEvent(event);
+    if (++npaints == 50)
+        eventLoop.quit();
+}
+
+void ChipTester::timerEvent(QTimerEvent *)
+{
+    switch (operation) {
+    case Rotate360:
+        rotate(1);
+        break;
+    case ZoomInOut: {
+        qreal s = 0.05 + (npaints / 20.0);
+        setTransform(QTransform().scale(s, s));
+        break;
+    }
+    case Translate: {
+        int offset = horizontalScrollBar()->minimum()
+            + (npaints % (horizontalScrollBar()->maximum() - horizontalScrollBar()->minimum()));
+        horizontalScrollBar()->setValue(offset);
+        break;
+    }
+    }
+}
+
+void ChipTester::populateScene()
+{
+    scene = new QGraphicsScene;
+
+    QImage image(":/qt4logo.png");
+
+    // Populate scene
+    int xx = 0;
+    int nitems = 0;
+    for (int i = -1100; i < 1100; i += 110) {
+        ++xx;
+        int yy = 0;
+        for (int j = -700; j < 700; j += 70) {
+            ++yy;
+            qreal x = (i + 1100) / 2200.0;
+            qreal y = (j + 700) / 1400.0;
+
+            QColor color(image.pixel(int(image.width() * x), int(image.height() * y)));
+            QGraphicsItem *item = new Chip(color, xx, yy);
+            item->setPos(QPointF(i, j));
+            scene->addItem(item);
+
+            ++nitems;
+        }
+    }
+}

tests/benchmarks/widgets/graphicsview/qgraphicsview/chiptester/chiptester.h

@@ -0,0 +1,46 @@
+// Copyright (C) 2020 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
+
+#ifndef CHIPTESTER_H
+#define CHIPTESTER_H
+
+#include <QtWidgets/QGraphicsView>
+#include <QtCore/QEventLoop>
+
+QT_FORWARD_DECLARE_CLASS(QGraphicsScene)
+QT_FORWARD_DECLARE_CLASS(QGraphicsView)
+QT_FORWARD_DECLARE_CLASS(QLabel)
+QT_FORWARD_DECLARE_CLASS(QSlider)
+QT_FORWARD_DECLARE_CLASS(QSplitter)
+
+class ChipTester : public QGraphicsView
+{
+    Q_OBJECT
+public:
+    enum Operation {
+        Rotate360,
+        ZoomInOut,
+        Translate
+    };
+    ChipTester(QWidget *parent = nullptr);
+
+    void setAntialias(bool enabled);
+    void runBenchmark();
+    void setOperation(Operation operation);
+
+protected:
+    void paintEvent(QPaintEvent *event) override;
+    void timerEvent(QTimerEvent *event) override;
+
+private:
+    void populateScene();
+
+    QGraphicsView *view;
+    QGraphicsScene *scene;
+    int npaints;
+    int timerId;
+    QEventLoop eventLoop;
+    Operation operation;
+};
+
+#endif

tests/benchmarks/widgets/graphicsview/qgraphicsview/chiptester/images.qrc

@@ -0,0 +1,5 @@
+<!DOCTYPE RCC><RCC version="1.0">
+<qresource>
+    <file>qt4logo.png</file>
+</qresource>
+</RCC>

tests/benchmarks/widgets/graphicsview/qgraphicsview/tst_qgraphicsview.cpp

@@ -0,0 +1,861 @@
+// Copyright (C) 2016 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/QDebug>
+#include <QtWidgets/QGraphicsItem>
+#include <QtWidgets/QGraphicsScene>
+#include <QtWidgets/QGraphicsView>
+#include <QtGui/QImage>
+#include <QtGui/QPixmapCache>
+
+#include "chiptester/chiptester.h"
+//#define CALLGRIND_DEBUG
+#ifdef CALLGRIND_DEBUG
+#include "valgrind/callgrind.h"
+#endif
+
+static inline void processEvents()
+{
+    QPixmapCache::clear();
+    QApplication::processEvents();
+    QApplication::processEvents();
+}
+
+class TestView : public QGraphicsView
+{
+    Q_OBJECT
+public:
+    TestView() : QGraphicsView(), waiting(false), timerId(-1)
+    {}
+
+    void waitForPaintEvent(int timeout = 4000)
+    {
+        if (waiting)
+            return;
+        waiting = true;
+        timerId = startTimer(timeout);
+        eventLoop.exec();
+        killTimer(timerId);
+        timerId = -1;
+        waiting = false;
+    }
+
+    void tryResize(int width, int height)
+    {
+        const QSize desktopSize = QGuiApplication::primaryScreen()->size();
+        if (desktopSize.width() < width)
+            width = desktopSize.width();
+        if (desktopSize.height() < height)
+            height = desktopSize.height();
+        if (size() != QSize(width, height)) {
+            resize(width, height);
+            QTest::qWait(250);
+            processEvents();
+        }
+    }
+
+protected:
+    void paintEvent(QPaintEvent *event) override
+    {
+        QGraphicsView::paintEvent(event);
+        if (waiting)
+            eventLoop.exit();
+    }
+
+    void timerEvent(QTimerEvent *event) override
+    {
+        if (event->timerId() == timerId)
+            eventLoop.exit();
+    }
+
+private:
+    QEventLoop eventLoop;
+    bool waiting;
+    int timerId;
+};
+
+class tst_QGraphicsView : public QObject
+{
+    Q_OBJECT
+
+public:
+    tst_QGraphicsView();
+    virtual ~tst_QGraphicsView();
+
+public slots:
+    void initTestCase();
+    void init();
+    void cleanup();
+
+private slots:
+    void construct();
+    void paintSingleItem();
+    void paintDeepStackingItems();
+    void paintDeepStackingItems_clipped();
+    void moveSingleItem();
+    void mapPointToScene_data();
+    void mapPointToScene();
+    void mapPointFromScene_data();
+    void mapPointFromScene();
+    void mapRectToScene_data();
+    void mapRectToScene();
+    void mapRectFromScene_data();
+    void mapRectFromScene();
+    void chipTester_data();
+    void chipTester();
+    void deepNesting_data();
+    void deepNesting();
+    void imageRiver_data();
+    void imageRiver();
+    void textRiver_data();
+    void textRiver();
+    void moveItemCache_data();
+    void moveItemCache();
+    void paintItemCache_data();
+    void paintItemCache();
+
+private:
+    TestView mView;
+};
+
+tst_QGraphicsView::tst_QGraphicsView()
+{
+}
+
+tst_QGraphicsView::~tst_QGraphicsView()
+{
+}
+
+void tst_QGraphicsView::initTestCase()
+{
+    mView.setFrameStyle(0);
+    mView.setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
+    mView.setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
+    mView.tryResize(100, 100);
+    mView.show();
+    QVERIFY(QTest::qWaitForWindowExposed(&mView));
+    QTest::qWait(300);
+    processEvents();
+}
+
+void tst_QGraphicsView::init()
+{
+    mView.setRenderHints(QPainter::RenderHints(0));
+    mView.viewport()->setMouseTracking(false);
+    mView.setViewportUpdateMode(QGraphicsView::BoundingRectViewportUpdate);
+    for (int i = 0; i < 3; ++i)
+        processEvents();
+}
+
+void tst_QGraphicsView::cleanup()
+{
+}
+
+void tst_QGraphicsView::construct()
+{
+    QBENCHMARK {
+        QGraphicsView view;
+    }
+}
+
+void tst_QGraphicsView::paintSingleItem()
+{
+    QGraphicsScene scene(0, 0, 100, 100);
+    scene.addRect(0, 0, 10, 10);
+
+    mView.setScene(&scene);
+    mView.tryResize(100, 100);
+    processEvents();
+
+    QImage image(100, 100, QImage::Format_ARGB32_Premultiplied);
+    QPainter painter(&image);
+    QBENCHMARK {
+        mView.viewport()->render(&painter);
+    }
+}
+
+#define DEEP_STACKING_COUNT 85
+
+void tst_QGraphicsView::paintDeepStackingItems()
+{
+    QGraphicsScene scene(0, 0, 100, 100);
+    QGraphicsRectItem *item = scene.addRect(0, 0, 10, 10);
+    QGraphicsRectItem *lastRect = item;
+    for (int i = 0; i < DEEP_STACKING_COUNT; ++i) {
+        QGraphicsRectItem *rect = scene.addRect(0, 0, 10, 10);
+        rect->setPos(1, 1);
+        rect->setParentItem(lastRect);
+        lastRect = rect;
+    }
+
+    mView.setScene(&scene);
+    mView.tryResize(100, 100);
+    processEvents();
+
+    QImage image(100, 100, QImage::Format_ARGB32_Premultiplied);
+    QPainter painter(&image);
+    QBENCHMARK {
+        mView.viewport()->render(&painter);
+    }
+}
+
+void tst_QGraphicsView::paintDeepStackingItems_clipped()
+{
+    QGraphicsScene scene(0, 0, 100, 100);
+    QGraphicsRectItem *item = scene.addRect(0, 0, 10, 10);
+    item->setFlag(QGraphicsItem::ItemClipsChildrenToShape);
+    QGraphicsRectItem *lastRect = item;
+    for (int i = 0; i < DEEP_STACKING_COUNT; ++i) {
+        QGraphicsRectItem *rect = scene.addRect(0, 0, 10, 10);
+        rect->setPos(1, 1);
+        rect->setParentItem(lastRect);
+        lastRect = rect;
+    }
+
+    mView.setScene(&scene);
+    mView.tryResize(100, 100);
+    processEvents();
+
+    QImage image(100, 100, QImage::Format_ARGB32_Premultiplied);
+    QPainter painter(&image);
+    QBENCHMARK {
+        mView.viewport()->render(&painter);
+    }
+}
+
+void tst_QGraphicsView::moveSingleItem()
+{
+    QGraphicsScene scene(0, 0, 100, 100);
+    QGraphicsRectItem *item = scene.addRect(0, 0, 10, 10);
+
+    mView.setScene(&scene);
+    mView.tryResize(100, 100);
+    processEvents();
+
+    int n = 1;
+    QBENCHMARK {
+        item->setPos(25 * n, 25 * n);
+        mView.waitForPaintEvent();
+        n = n ? 0 : 1;
+    }
+}
+
+void tst_QGraphicsView::mapPointToScene_data()
+{
+    QTest::addColumn<QTransform>("transform");
+    QTest::addColumn<QPoint>("point");
+
+    QTest::newRow("null") << QTransform() << QPoint();
+    QTest::newRow("identity  QPoint(100, 100)") << QTransform() << QPoint(100, 100);
+    QTest::newRow("rotate    QPoint(100, 100)") << QTransform().rotate(90) << QPoint(100, 100);
+    QTest::newRow("scale     QPoint(100, 100)") << QTransform().scale(5, 5) << QPoint(100, 100);
+    QTest::newRow("translate QPoint(100, 100)") << QTransform().translate(5, 5) << QPoint(100, 100);
+    QTest::newRow("shear     QPoint(100, 100)") << QTransform().shear(1.5, 1.5) << QPoint(100, 100);
+    QTest::newRow("perspect  QPoint(100, 100)") << QTransform().rotate(45, Qt::XAxis) << QPoint(100, 100);
+}
+
+void tst_QGraphicsView::mapPointToScene()
+{
+    QFETCH(QTransform, transform);
+    QFETCH(QPoint, point);
+
+    QGraphicsView view;
+    view.setTransform(transform);
+    processEvents();
+
+    QBENCHMARK {
+        view.mapToScene(point);
+    }
+}
+
+void tst_QGraphicsView::mapPointFromScene_data()
+{
+    QTest::addColumn<QTransform>("transform");
+    QTest::addColumn<QPointF>("point");
+
+    QTest::newRow("null") << QTransform() << QPointF();
+    QTest::newRow("identity  QPointF(100, 100)") << QTransform() << QPointF(100, 100);
+    QTest::newRow("rotate    QPointF(100, 100)") << QTransform().rotate(90) << QPointF(100, 100);
+    QTest::newRow("scale     QPointF(100, 100)") << QTransform().scale(5, 5) << QPointF(100, 100);
+    QTest::newRow("translate QPointF(100, 100)") << QTransform().translate(5, 5) << QPointF(100, 100);
+    QTest::newRow("shear     QPointF(100, 100)") << QTransform().shear(1.5, 1.5) << QPointF(100, 100);
+    QTest::newRow("perspect  QPointF(100, 100)") << QTransform().rotate(45, Qt::XAxis) << QPointF(100, 100);
+}
+
+void tst_QGraphicsView::mapPointFromScene()
+{
+    QFETCH(QTransform, transform);
+    QFETCH(QPointF, point);
+
+    QGraphicsView view;
+    view.setTransform(transform);
+    processEvents();
+
+    QBENCHMARK {
+        view.mapFromScene(point);
+    }
+}
+
+void tst_QGraphicsView::mapRectToScene_data()
+{
+    QTest::addColumn<QTransform>("transform");
+    QTest::addColumn<QRect>("rect");
+
+    QTest::newRow("null") << QTransform() << QRect();
+    QTest::newRow("identity  QRect(0, 0, 100, 100)") << QTransform() << QRect(0, 0, 100, 100);
+    QTest::newRow("rotate    QRect(0, 0, 100, 100)") << QTransform().rotate(90) << QRect(0, 0, 100, 100);
+    QTest::newRow("scale     QRect(0, 0, 100, 100)") << QTransform().scale(5, 5) << QRect(0, 0, 100, 100);
+    QTest::newRow("translate QRect(0, 0, 100, 100)") << QTransform().translate(5, 5) << QRect(0, 0, 100, 100);
+    QTest::newRow("shear     QRect(0, 0, 100, 100)") << QTransform().shear(1.5, 1.5) << QRect(0, 0, 100, 100);
+    QTest::newRow("perspect  QRect(0, 0, 100, 100)") << QTransform().rotate(45, Qt::XAxis) << QRect(0, 0, 100, 100);
+}
+
+void tst_QGraphicsView::mapRectToScene()
+{
+    QFETCH(QTransform, transform);
+    QFETCH(QRect, rect);
+
+    QGraphicsView view;
+    view.setTransform(transform);
+    processEvents();
+
+    QBENCHMARK {
+        view.mapToScene(rect);
+    }
+}
+
+void tst_QGraphicsView::mapRectFromScene_data()
+{
+    QTest::addColumn<QTransform>("transform");
+    QTest::addColumn<QRectF>("rect");
+
+    QTest::newRow("null") << QTransform() << QRectF();
+    QTest::newRow("identity  QRectF(0, 0, 100, 100)") << QTransform() << QRectF(0, 0, 100, 100);
+    QTest::newRow("rotate    QRectF(0, 0, 100, 100)") << QTransform().rotate(90) << QRectF(0, 0, 100, 100);
+    QTest::newRow("scale     QRectF(0, 0, 100, 100)") << QTransform().scale(5, 5) << QRectF(0, 0, 100, 100);
+    QTest::newRow("translate QRectF(0, 0, 100, 100)") << QTransform().translate(5, 5) << QRectF(0, 0, 100, 100);
+    QTest::newRow("shear     QRectF(0, 0, 100, 100)") << QTransform().shear(1.5, 1.5) << QRectF(0, 0, 100, 100);
+    QTest::newRow("perspect  QRectF(0, 0, 100, 100)") << QTransform().rotate(45, Qt::XAxis) << QRectF(0, 0, 100, 100);
+}
+
+void tst_QGraphicsView::mapRectFromScene()
+{
+    QFETCH(QTransform, transform);
+    QFETCH(QRectF, rect);
+
+    QGraphicsView view;
+    view.setTransform(transform);
+    processEvents();
+
+    QBENCHMARK {
+        view.mapFromScene(rect);
+    }
+}
+
+void tst_QGraphicsView::chipTester_data()
+{
+    QTest::addColumn<bool>("antialias");
+    QTest::addColumn<int>("operation");
+    QTest::newRow("rotate") << false << 0;
+    QTest::newRow("rotate, antialias") << true << 0;
+    QTest::newRow("zoom") << false << 1;
+    QTest::newRow("zoom, antialias") << true << 1;
+    QTest::newRow("translate") << false << 2;
+    QTest::newRow("translate, antialias") << true << 2;
+}
+
+void tst_QGraphicsView::chipTester()
+{
+    QFETCH(bool, antialias);
+    QFETCH(int, operation);
+
+    ChipTester tester;
+    tester.setAntialias(antialias);
+    tester.setOperation(ChipTester::Operation(operation));
+    tester.show();
+    QVERIFY(QTest::qWaitForWindowExposed(&tester));
+    QTest::qWait(250);
+    processEvents();
+
+    QBENCHMARK {
+        tester.runBenchmark();
+    }
+}
+
+static void addChildHelper(QGraphicsItem *parent, int n, bool rotate)
+{
+    if (!n)
+        return;
+    QGraphicsRectItem *item = new QGraphicsRectItem(QRectF(0, 0, 50, 50), parent);
+    item->setPos(10, 10);
+    if (rotate)
+        item->setTransform(QTransform().rotate(10), true);
+    addChildHelper(item, n - 1, rotate);
+}
+
+void tst_QGraphicsView::deepNesting_data()
+{
+    QTest::addColumn<bool>("rotate");
+    QTest::addColumn<bool>("bsp");
+
+    QTest::newRow("bsp, no transform") << false << true;
+    QTest::newRow("bsp, rotation") << true << true;
+    QTest::newRow("no transform") << false << false;
+    QTest::newRow("rotation") << true << false;
+}
+
+void tst_QGraphicsView::deepNesting()
+{
+    QFETCH(bool, rotate);
+    QFETCH(bool, bsp);
+
+    QGraphicsScene scene;
+    for (int y = 0; y < 15; ++y) {
+        for (int x = 0; x < 15; ++x) {
+            QGraphicsItem *item1 = scene.addRect(QRectF(0, 0, 50, 50));
+            if (rotate)
+                item1->setTransform(QTransform().rotate(10), true);
+            item1->setPos(x * 25, y * 25);
+            addChildHelper(item1, 30, rotate);
+        }
+    }
+    scene.setItemIndexMethod(bsp ? QGraphicsScene::BspTreeIndex : QGraphicsScene::NoIndex);
+    scene.setSceneRect(scene.sceneRect());
+
+    mView.setRenderHint(QPainter::Antialiasing);
+    mView.setScene(&scene);
+    mView.tryResize(600, 600);
+    (void)scene.items(QPointF(0, 0));
+    processEvents();
+
+    QBENCHMARK {
+#ifdef CALLGRIND_DEBUG
+        CALLGRIND_START_INSTRUMENTATION
+#endif
+        mView.viewport()->update();
+        mView.waitForPaintEvent();
+#ifdef CALLGRIND_DEBUG
+        CALLGRIND_STOP_INSTRUMENTATION
+#endif
+    }
+}
+
+class AnimatedPixmapItem : public QGraphicsPixmapItem
+{
+public:
+    AnimatedPixmapItem(int x, int y, bool rot, bool scal, QGraphicsItem *parent = nullptr)
+        : QGraphicsPixmapItem(parent), rotateFactor(0), scaleFactor(0)
+    {
+        rotate = rot;
+        scale = scal;
+        xspeed = x;
+        yspeed = y;
+    }
+
+protected:
+    void advance(int i) override
+    {
+        if (!i)
+            return;
+        int x = int(pos().x()) + pixmap().width();
+        x += xspeed;
+        x = (x % (300 + pixmap().width() * 2)) - pixmap().width();
+        int y = int(pos().y()) + pixmap().width();
+        y += yspeed;
+        y = (y % (300 + pixmap().width() * 2)) - pixmap().width();
+        setPos(x, y);
+
+        int rot = rotateFactor;
+        int sca = scaleFactor;
+        if (rotate)
+            rotateFactor = 1 + (rot + xspeed) % 360;
+        if (scale)
+            scaleFactor = 1 + (sca + yspeed) % 50;
+
+        if (rotate || scale) {
+            qreal s = 0.5 + scaleFactor / 50.0;
+            setTransform(QTransform().rotate(rotateFactor).scale(s, s));
+        }
+    }
+
+private:
+    int xspeed;
+    int yspeed;
+    int rotateFactor;
+    int scaleFactor;
+    bool rotate;
+    bool scale;
+};
+
+void tst_QGraphicsView::imageRiver_data()
+{
+    QTest::addColumn<int>("direction");
+    QTest::addColumn<bool>("rotation");
+    QTest::addColumn<bool>("scale");
+    QTest::newRow("horizontal") << 0 << false << false;
+    QTest::newRow("vertical") << 1 << false << false;
+    QTest::newRow("both") << 2 << false << false;
+    QTest::newRow("horizontal rot") << 0 << true << false;
+    QTest::newRow("horizontal scale") << 0 << false << true;
+    QTest::newRow("horizontal rot + scale") << 0 << true << true;
+}
+
+void tst_QGraphicsView::imageRiver()
+{
+    QFETCH(int, direction);
+    QFETCH(bool, rotation);
+    QFETCH(bool, scale);
+
+    QGraphicsScene scene(0, 0, 300, 300);
+
+    QPixmap pix(":/images/designer.png");
+    QVERIFY(!pix.isNull());
+
+    QList<QGraphicsItem *> items;
+    QFile file(":/random.data");
+    QVERIFY(file.open(QIODevice::ReadOnly));
+    QDataStream str(&file);
+    for (int i = 0; i < 50; ++i) {
+        AnimatedPixmapItem *item = 0;
+        if (direction == 0) item = new AnimatedPixmapItem((i % 4) + 1, 0, rotation, scale);
+        if (direction == 1) item = new AnimatedPixmapItem(0, (i % 4) + 1, rotation, scale);
+        if (direction == 2) item = new AnimatedPixmapItem((i % 4) + 1, (i % 4) + 1, rotation, scale);
+        item->setPixmap(pix);
+        int rnd1, rnd2;
+        str >> rnd1 >> rnd2;
+        item->setPos(-pix.width() + rnd1 % (300 + pix.width()),
+                     -pix.height() + rnd2 % (300 + pix.height()));
+        scene.addItem(item);
+    }
+    scene.setSceneRect(0, 0, 300, 300);
+
+    mView.setScene(&scene);
+    mView.tryResize(300, 300);
+    processEvents();
+
+    QBENCHMARK {
+#ifdef CALLGRIND_DEBUG
+        CALLGRIND_START_INSTRUMENTATION
+#endif
+        for (int i = 0; i < 50; ++i) {
+            scene.advance();
+            mView.waitForPaintEvent();
+        }
+#ifdef CALLGRIND_DEBUG
+        CALLGRIND_STOP_INSTRUMENTATION
+#endif
+    }
+}
+
+class AnimatedTextItem : public QGraphicsSimpleTextItem
+{
+public:
+    AnimatedTextItem(int x, int y, bool rot, bool scal, QGraphicsItem *parent = nullptr)
+        : QGraphicsSimpleTextItem(parent), rotateFactor(0), scaleFactor(25)
+    {
+        setText("River of text");
+        rotate = rot;
+        scale = scal;
+        xspeed = x;
+        yspeed = y;
+    }
+
+protected:
+    void advance(int i) override
+    {
+        if (!i)
+            return;
+        QRect r = boundingRect().toRect();
+        int x = int(pos().x()) + r.width();
+        x += xspeed;
+        x = (x % (300 + r.width() * 2)) - r.width();
+        int y = int(pos().y()) + r.width();
+        y += yspeed;
+        y = (y % (300 + r.width() * 2)) - r.width();
+        setPos(x, y);
+
+        int rot = rotateFactor;
+        int sca = scaleFactor;
+        if (rotate)
+            rotateFactor = 1 + (rot + xspeed) % 360;
+        if (scale)
+            scaleFactor = 1 + (sca + yspeed) % 50;
+
+        if (rotate || scale) {
+            qreal s = 0.5 + scaleFactor / 50.0;
+            setTransform(QTransform().rotate(rotateFactor).scale(s, s));
+        }
+    }
+
+private:
+    int xspeed;
+    int yspeed;
+    int rotateFactor;
+    int scaleFactor;
+    bool rotate;
+    bool scale;
+};
+
+void tst_QGraphicsView::textRiver_data()
+{
+    QTest::addColumn<int>("direction");
+    QTest::addColumn<bool>("rotation");
+    QTest::addColumn<bool>("scale");
+    QTest::newRow("horizontal") << 0 << false << false;
+    QTest::newRow("vertical") << 1 << false << false;
+    QTest::newRow("both") << 2 << false << false;
+    QTest::newRow("horizontal rot") << 0 << true << false;
+    QTest::newRow("horizontal scale") << 0 << false << true;
+    QTest::newRow("horizontal rot + scale") << 0 << true << true;
+}
+
+void tst_QGraphicsView::textRiver()
+{
+    QFETCH(int, direction);
+    QFETCH(bool, rotation);
+    QFETCH(bool, scale);
+
+    QGraphicsScene scene(0, 0, 300, 300);
+
+    QPixmap pix(":/images/designer.png");
+    QVERIFY(!pix.isNull());
+
+    QList<QGraphicsItem *> items;
+    QFile file(":/random.data");
+    QVERIFY(file.open(QIODevice::ReadOnly));
+    QDataStream str(&file);
+    for (int i = 0; i < 50; ++i) {
+        AnimatedTextItem *item = 0;
+        if (direction == 0) item = new AnimatedTextItem((i % 4) + 1, 0, rotation, scale);
+        if (direction == 1) item = new AnimatedTextItem(0, (i % 4) + 1, rotation, scale);
+        if (direction == 2) item = new AnimatedTextItem((i % 4) + 1, (i % 4) + 1, rotation, scale);
+        int rnd1, rnd2;
+        str >> rnd1 >> rnd2;
+        item->setPos(-pix.width() + rnd1 % (300 + pix.width()),
+                     -pix.height() + rnd2 % (300 + pix.height()));
+        item->setAcceptDrops(false);
+        item->setAcceptHoverEvents(false);
+        scene.addItem(item);
+    }
+    scene.setSceneRect(0, 0, 300, 300);
+
+    mView.setScene(&scene);
+    mView.tryResize(300, 300);
+    processEvents();
+
+    QBENCHMARK {
+#ifdef CALLGRIND_DEBUG
+        CALLGRIND_START_INSTRUMENTATION
+#endif
+        for (int i = 0; i < 50; ++i) {
+            scene.advance();
+            mView.waitForPaintEvent();
+        }
+#ifdef CALLGRIND_DEBUG
+        CALLGRIND_STOP_INSTRUMENTATION
+#endif
+    }
+}
+
+class AnimatedPixmapCacheItem : public QGraphicsPixmapItem
+{
+public:
+    AnimatedPixmapCacheItem(int x, int y, QGraphicsItem *parent = nullptr)
+        : QGraphicsPixmapItem(parent)
+    {
+        xspeed = x;
+        yspeed = y;
+    }
+
+    void paint(QPainter *painter, const QStyleOptionGraphicsItem *option,
+               QWidget *widget = 0) override
+    {
+        QGraphicsPixmapItem::paint(painter,option,widget);
+        //We just want to wait, and we don't want to process the event loop with qWait
+        QTest::qSleep(3);
+    }
+protected:
+    void advance(int i) override
+    {
+        if (!i)
+            return;
+        int x = int(pos().x()) + pixmap().width();
+        x += xspeed;
+        x = (x % (300 + pixmap().width() * 2)) - pixmap().width();
+        int y = int(pos().y()) + pixmap().width();
+        y += yspeed;
+        y = (y % (300 + pixmap().width() * 2)) - pixmap().width();
+        setPos(x, y);
+    }
+
+private:
+    int xspeed;
+    int yspeed;
+};
+
+void tst_QGraphicsView::moveItemCache_data()
+{
+    QTest::addColumn<int>("direction");
+    QTest::addColumn<bool>("rotation");
+    QTest::addColumn<int>("cacheMode");
+    QTest::newRow("Horizontal movement : ItemCoordinate Cache") << 0 << false << (int)QGraphicsItem::ItemCoordinateCache;
+    QTest::newRow("Horizontal movement : DeviceCoordinate Cache") << 0 << false << (int)QGraphicsItem::DeviceCoordinateCache;
+    QTest::newRow("Horizontal movement : No Cache") << 0 << false << (int)QGraphicsItem::NoCache;
+    QTest::newRow("Vertical +  Horizontal movement : ItemCoordinate Cache") << 2 << false <<  (int)QGraphicsItem::ItemCoordinateCache;
+    QTest::newRow("Vertical +  Horizontal movement : DeviceCoordinate Cache") << 2 << false <<  (int)QGraphicsItem::DeviceCoordinateCache;
+    QTest::newRow("Vertical +  Horizontal movement : No Cache") << 2 << false << (int)QGraphicsItem::NoCache;
+    QTest::newRow("Horizontal movement + Rotation : ItemCoordinate Cache") << 0 << true << (int)QGraphicsItem::ItemCoordinateCache;
+    QTest::newRow("Horizontal movement + Rotation : DeviceCoordinate Cache") << 0 << true << (int)QGraphicsItem::DeviceCoordinateCache;
+    QTest::newRow("Horizontal movement + Rotation : No Cache") << 0 << true << (int)QGraphicsItem::NoCache;
+}
+
+void tst_QGraphicsView::moveItemCache()
+{
+    QFETCH(int, direction);
+    QFETCH(bool, rotation);
+    QFETCH(int, cacheMode);
+
+    QGraphicsScene scene(0, 0, 300, 300);
+
+    QPixmap pix(":/images/wine.jpeg");
+    QVERIFY(!pix.isNull());
+
+    QList<QGraphicsItem *> items;
+    QFile file(":/random.data");
+    QVERIFY(file.open(QIODevice::ReadOnly));
+    QDataStream str(&file);
+    for (int i = 0; i < 5; ++i) {
+        AnimatedPixmapCacheItem *item = 0;
+        if (direction == 0) item = new AnimatedPixmapCacheItem((i % 4) + 1, 0);
+        if (direction == 1) item = new AnimatedPixmapCacheItem(0, (i % 4) + 1);
+        if (direction == 2) item = new AnimatedPixmapCacheItem((i % 4) + 1, (i % 4) + 1);
+        item->setPixmap(pix);
+        item->setCacheMode((QGraphicsItem::CacheMode)cacheMode);
+        if (rotation)
+            item->setTransform(QTransform().rotate(45));
+        int rnd1, rnd2;
+        str >> rnd1 >> rnd2;
+        item->setPos(-pix.width() + rnd1 % (400 + pix.width()),
+                     -pix.height() + rnd2 % (400 + pix.height()));
+        scene.addItem(item);
+    }
+    scene.setSceneRect(0, 0, 400, 400);
+
+    mView.setScene(&scene);
+    mView.tryResize(400, 400);
+    processEvents();
+
+    QBENCHMARK {
+#ifdef CALLGRIND_DEBUG
+        CALLGRIND_START_INSTRUMENTATION
+#endif
+        for (int i = 0; i < 5; ++i) {
+            scene.advance();
+            mView.waitForPaintEvent();
+        }
+#ifdef CALLGRIND_DEBUG
+        CALLGRIND_STOP_INSTRUMENTATION
+#endif
+    }
+}
+
+class UpdatedPixmapCacheItem : public QGraphicsPixmapItem
+{
+public:
+    UpdatedPixmapCacheItem(bool partial, QGraphicsItem *parent = nullptr)
+        : QGraphicsPixmapItem(parent), partial(partial)
+    {
+    }
+
+    void paint(QPainter *painter, const QStyleOptionGraphicsItem *option,
+               QWidget *widget = 0) override
+    {
+        QGraphicsPixmapItem::paint(painter,option,widget);
+    }
+protected:
+    void advance(int i) override
+    {
+        Q_UNUSED(i);
+        if (partial)
+            update(QRectF(boundingRect().center().x(), boundingRect().center().x(), 30, 30));
+        else
+            update();
+    }
+
+private:
+    bool partial;
+};
+
+void tst_QGraphicsView::paintItemCache_data()
+{
+    QTest::addColumn<bool>("updatePartial");
+    QTest::addColumn<bool>("rotation");
+    QTest::addColumn<int>("cacheMode");
+    QTest::newRow("Partial Update : ItemCoordinate Cache") << true << false << (int)QGraphicsItem::ItemCoordinateCache;
+    QTest::newRow("Partial Update : DeviceCoordinate Cache") << true << false << (int)QGraphicsItem::DeviceCoordinateCache;
+    QTest::newRow("Partial Update : No Cache") << true << false << (int)QGraphicsItem::NoCache;
+    QTest::newRow("Full Update : ItemCoordinate Cache") << false << false << (int)QGraphicsItem::ItemCoordinateCache;
+    QTest::newRow("Full Update : DeviceCoordinate Cache") << false << false << (int)QGraphicsItem::DeviceCoordinateCache;
+    QTest::newRow("Full Update : No Cache") << false << false << (int)QGraphicsItem::NoCache;
+    QTest::newRow("Partial Update : ItemCoordinate Cache item rotated") << true << true << (int)QGraphicsItem::ItemCoordinateCache;
+    QTest::newRow("Partial Update : DeviceCoordinate Cache item rotated") << true << true << (int)QGraphicsItem::DeviceCoordinateCache;
+    QTest::newRow("Partial Update : No Cache item rotated") << true << true << (int)QGraphicsItem::NoCache;
+    QTest::newRow("Full Update : ItemCoordinate Cache item rotated") << false  << true << (int)QGraphicsItem::ItemCoordinateCache;
+    QTest::newRow("Full Update : DeviceCoordinate Cache item rotated") << false << true << (int)QGraphicsItem::DeviceCoordinateCache;
+    QTest::newRow("Full Update : No Cache item rotated") << false << true <<(int)QGraphicsItem::NoCache;
+}
+
+void tst_QGraphicsView::paintItemCache()
+{
+    QFETCH(bool, updatePartial);
+    QFETCH(bool, rotation);
+    QFETCH(int, cacheMode);
+
+    QGraphicsScene scene(0, 0, 300, 300);
+
+    QPixmap pix(":/images/wine.jpeg");
+    QVERIFY(!pix.isNull());
+
+    QList<QGraphicsItem *> items;
+    QFile file(":/random.data");
+    QVERIFY(file.open(QIODevice::ReadOnly));
+    QDataStream str(&file);
+    UpdatedPixmapCacheItem *item = new UpdatedPixmapCacheItem(updatePartial);
+    item->setPixmap(pix);
+    item->setCacheMode((QGraphicsItem::CacheMode)cacheMode);
+    if (rotation)
+        item->setTransform(QTransform().rotate(45));
+    item->setPos(-100, -100);
+    scene.addItem(item);
+
+    QPixmap pix2(":/images/wine-big.jpeg");
+    item = new UpdatedPixmapCacheItem(updatePartial);
+    item->setPixmap(pix2);
+    item->setCacheMode((QGraphicsItem::CacheMode)cacheMode);
+    if (rotation)
+        item->setTransform(QTransform().rotate(45));
+    item->setPos(0, 0);
+    scene.addItem(item);
+    scene.setSceneRect(-100, -100, 600, 600);
+
+    mView.tryResize(600, 600);
+    mView.setScene(&scene);
+    processEvents();
+
+    QBENCHMARK {
+#ifdef CALLGRIND_DEBUG
+        CALLGRIND_START_INSTRUMENTATION
+#endif
+        for (int i = 0; i < 5; ++i) {
+            scene.advance();
+            mView.waitForPaintEvent();
+        }
+#ifdef CALLGRIND_DEBUG
+        CALLGRIND_STOP_INSTRUMENTATION
+#endif
+    }
+}
+
+QTEST_MAIN(tst_QGraphicsView)
+#include "tst_qgraphicsview.moc"