Added trace graphics system for painting performance profiling.

When running an application with graphics system trace everything that
gets painted to the window surface is proxied through a QPaintBuffer,
which is then both streamed to a trace file and replayed on a raster
window surface. The trace file can then be replayed with
tools/qttracereplay to measure pure painting performance.

Reviewed-by: Gunnar Sletta

1 files changed, 198 insertions, 0 deletions

diff --git a/tools/qttracereplay/main.cpp b/tools/qttracereplay/main.cpp
new file mode 100644
index 0000000..970531b
--- /dev/null
+++ b/tools/qttracereplay/main.cpp
@@ -0,0 +1,198 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the tools applications of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the Technology Preview License Agreement accompanying
+** this package.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain
+** additional rights.  These rights are described in the Nokia Qt LGPL
+** Exception version 1.1, included in the file LGPL_EXCEPTION.txt in this
+** package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include <QtGui>
+#include <QtDebug>
+
+#include <private/qpaintengineex_p.h>
+#include <private/qpaintbuffer_p.h>
+
+struct Frame
+{
+    QRegion updateRegion;
+    QPaintBuffer *buffer;
+};
+
+class ReplayWidget : public QWidget
+{
+    Q_OBJECT
+public:
+    ReplayWidget(const QString &filename);
+
+    void paintEvent(QPaintEvent *event);
+
+public slots:
+    void updateRect();
+
+private:
+    QList<Frame> frames;
+    int currentFrame;
+    int currentIteration;
+    QTime timer;
+
+    QList<uint> iterationTimes;
+    QString filename;
+};
+
+void ReplayWidget::updateRect()
+{
+    update(frames.at(currentFrame).updateRegion);
+}
+
+void ReplayWidget::paintEvent(QPaintEvent *)
+{
+    QPainter p(this);
+
+//    p.setClipRegion(frames.at(currentFrame).updateRegion);
+
+    frames.at(currentFrame).buffer->draw(&p);
+
+    ++currentFrame;
+    if (currentFrame >= frames.size()) {
+        currentFrame = 0;
+        ++currentIteration;
+
+        if (currentIteration == 3)
+            timer.start();
+        else if (currentIteration > 3) {
+            iterationTimes << timer.elapsed();
+            timer.restart();
+
+            if (iterationTimes.size() >= 3) {
+                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());
+
+                qSort(iterationTimes.begin(), iterationTimes.end());
+                qreal median = iterationTimes.at(iterationTimes.size() / 2);
+                if ((iterationTimes.size() % 1) == 1)
+                    median = (median + iterationTimes.at(iterationTimes.size() / 2 - 1)) * 0.5;
+
+                stddev = 100 * stddev / mean;
+
+                if (iterationTimes.size() >= 10 || stddev < 4) {
+                    printf("%s, iterations: %d, frames: %d, min(ms): %d, median(ms): %f, stddev: %f %%, max(fps): %f\n", qPrintable(filename),
+                            iterationTimes.size(), frames.size(), min, median, stddev, 1000. * frames.size() / min);
+                    deleteLater();
+                    return;
+                }
+            }
+        }
+    }
+
+    QTimer::singleShot(0, this, SLOT(updateRect()));
+}
+
+ReplayWidget::ReplayWidget(const QString &filename_)
+    : currentFrame(0)
+    , currentIteration(0)
+    , filename(filename_)
+{
+    setWindowTitle(filename);
+    QFile file(filename);
+
+    QRect bounds;
+    if (file.open(QIODevice::ReadOnly)) {
+        QDataStream in(&file);
+
+        while (true) {
+            int frameId;
+            in >> frameId;
+
+            if (in.status() != QDataStream::Ok)
+                break;
+
+            qulonglong windowId;
+            QRegion rgn;
+
+            in >> windowId;
+
+            Frame frame;
+            frame.buffer = new QPaintBuffer;
+
+            in >> bounds;
+
+            in >> frame.updateRegion;
+            in >> *frame.buffer;
+
+            frames << frame;
+        }
+    }
+
+    qDebug() << "Read" << frames.size() << "frames";
+
+    resize(bounds.size());
+
+    setAutoFillBackground(false);
+    setAttribute(Qt::WA_NoSystemBackground);
+
+    QTimer::singleShot(10, this, SLOT(updateRect()));
+}
+
+int main(int argc, char **argv)
+{
+    QApplication app(argc, argv);
+
+    if (argc <= 1) {
+        printf("Usage: %s filename\n", argv[0]);
+        return 1;
+    }
+
+    ReplayWidget *widget = new ReplayWidget(argv[1]);
+    widget->show();
+
+    return app.exec();
+}
+#include "main.moc"