Add some painting benchmarks.

Task-number: QT-2780

1 files changed, 269 insertions, 0 deletions

diff --git a/tests/benchmarks/declarative/painting/paintbenchmark.cpp b/tests/benchmarks/declarative/painting/paintbenchmark.cpp
new file mode 100644
index 0000000..87854bd
--- /dev/null
+++ b/tests/benchmarks/declarative/painting/paintbenchmark.cpp
@@ -0,0 +1,269 @@
+
+#include <QApplication>
+#include <QPixmap>
+#include <QImage>
+#include <QPainter>
+#include <QGLWidget>
+#include <QTextLayout>
+#include <QVBoxLayout>
+#include <QTime>
+#include <QDebug>
+
+#ifdef HAVE_STATICTEXT
+#include <private/qstatictext_p.h>
+#endif
+
+int iterations = 20;
+const int count = 6;
+const int lines = 12;
+const int spacing = 36;
+QSizeF size(1000, 800);
+const qreal lineWidth = 1000;
+QString strings[lines];
+
+void paint_QTextLayout(QPainter &p, bool useCache)
+{
+    static bool first = true;
+    static QTextLayout *textLayout[lines];
+    if (first) {
+        for (int i = 0; i < lines; ++i) {
+            textLayout[i] = new QTextLayout(strings[i]);
+            int leading = p.fontMetrics().leading();
+            qreal height = 0;
+            qreal widthUsed = 0;
+            textLayout[i]->setCacheEnabled(useCache);
+            textLayout[i]->beginLayout();
+            while (1) {
+                QTextLine line = textLayout[i]->createLine();
+                if (!line.isValid())
+                        break;
+
+                line.setLineWidth(lineWidth);
+                height += leading;
+                line.setPosition(QPointF(0, height));
+                height += line.height();
+                widthUsed = qMax(widthUsed, line.naturalTextWidth());
+            }
+            textLayout[i]->endLayout();
+        }
+        first = false;
+    }
+    for (int i = 0; i < count; ++i) {
+        for (int j = 0; j < lines; ++j) {
+            textLayout[j]->draw(&p, QPoint(0, j*spacing));
+        }
+    }
+}
+
+void paint_QTextLayout_noCache(QPainter &p)
+{
+    paint_QTextLayout(p, false);
+}
+
+void paint_QTextLayout_cache(QPainter &p)
+{
+    paint_QTextLayout(p, true);
+}
+
+#ifdef HAVE_STATICTEXT
+void paint_QStaticText(QPainter &p, bool useOptimizations)
+{
+    static QStaticText *staticText[lines];
+    static bool first = true;
+    if (first) {
+        for (int i = 0; i < lines; ++i) {
+            staticText[i] = new QStaticText(strings[i]);
+            staticText[i]->setUseBackendOptimizations(useOptimizations);
+        }
+        first = false;
+    }
+    for (int i = 0; i < count; ++i) {
+        for (int j = 0; j < lines; ++j) {
+            p.drawStaticText(QPointF(0, 30 + j*spacing), *staticText[j]);
+        }
+    }
+}
+
+void paint_QStaticText_noOptimizations(QPainter &p)
+{
+    paint_QStaticText(p, false);
+}
+
+void paint_QStaticText_optimizations(QPainter &p)
+{
+    paint_QStaticText(p, true);
+}
+#endif
+
+void paint_QPixmapCachedText(QPainter &p)
+{
+    static bool first = true;
+    static QPixmap cacheText[lines];
+    if (first) {
+        for (int i = 0; i < lines; ++i) {
+            QRectF trueSize;
+            trueSize = p.boundingRect(QRectF(QPointF(0,0), size), 0, strings[i]);
+            cacheText[i] = QPixmap(trueSize.size().toSize());
+            cacheText[i].fill(Qt::transparent);
+            QPainter paint(&cacheText[i]);
+            paint.setPen(Qt::black);
+            paint.drawText(QRectF(QPointF(0,0), trueSize.size().toSize()), strings[i]);
+        }
+        first = false;
+    }
+    for (int i = 0; i < count; i++) {
+        for (int j = 0; j < lines; ++j) {
+            p.drawPixmap(0,j*spacing,cacheText[j]);
+        }
+    }
+}
+
+void paint_RoundedRect(QPainter &p)
+{
+    p.setRenderHint(QPainter::Antialiasing, true);
+    p.setPen(Qt::black);
+    p.setBrush(Qt::red);
+    for (int i = 0; i < count; i++) {
+        for (int j = 0; j < lines; ++j) {
+            QSize size((j+1)*50, spacing-1);
+            p.drawRoundedRect(QRectF(QPointF(0,j*spacing), size), 8, 8);
+        }
+    }
+}
+
+void paint_QPixmapCachedRoundedRect(QPainter &p)
+{
+    static bool first = true;
+    static QPixmap cacheRect[lines];
+    if (first) {
+        for (int i = 0; i < lines; ++i) {
+            QSize size((i+1)*50, spacing-1);
+            cacheRect[i] = QPixmap(size);
+            cacheRect[i].fill(Qt::transparent);
+            QPainter paint(&cacheRect[i]);
+            paint.setRenderHint(QPainter::Antialiasing);
+            paint.setPen(Qt::black);
+            paint.setBrush(Qt::red);
+            paint.drawRoundedRect(QRect(QPoint(0,0), size), 8, 8);
+        }
+        first = false;
+    }
+    for (int i = 0; i < count; i++) {
+        for (int j = 0; j < lines; ++j) {
+            p.drawPixmap(0,j*spacing,cacheRect[j]);
+        }
+    }
+}
+
+typedef void(*PaintFunc)(QPainter &);
+
+struct {
+    const char *name;
+    PaintFunc func;
+} funcs[] = {
+    { "QTextLayoutNoCache", &paint_QTextLayout_noCache },
+    { "QTextLayoutWithCache", &paint_QTextLayout_cache },
+#ifdef HAVE_STATICTEXT
+    { "QStaticTextNoBackendOptimizations", &paint_QStaticText_noOptimizations },
+    { "QStaticTextWithBackendOptimizations", &paint_QStaticText_optimizations },
+#endif
+    { "CachedText", &paint_QPixmapCachedText },
+    { "RoundedRect", &paint_RoundedRect },
+    { "CachedRoundedRect", &paint_QPixmapCachedRoundedRect },
+    { 0, 0 }
+};
+
+PaintFunc testFunc = 0;
+
+class MyGLWidget : public QGLWidget
+{
+public:
+    MyGLWidget(const QGLFormat &format) : QGLWidget(format), frames(0) {
+        const char chars[] = "abcd efgh ijkl mnop qrst uvwx yz!$. ABCD 1234";
+        int len = strlen(chars);
+        for (int i = 0; i < lines; ++i) {
+            for (int j = 0; j < 60; j++) {
+                strings[i] += QChar(chars[rand() % len]);
+            }
+        }
+    }
+
+    void paintEvent(QPaintEvent *) {
+        static int last = 0;
+        static bool firstRun = true;
+        if (firstRun == 0) {
+            timer.start();
+            firstRun = false;
+        } else {
+            int elapsed = timer.elapsed();
+            qDebug() << "frame elapsed:" << elapsed - last;
+            last = elapsed;
+        }
+        QPainter p(this);
+	p.fillRect(rect(), Qt::white);
+	p.setPen(Qt::black);
+        QTime drawTimer;
+        drawTimer.start();
+        testFunc(p);
+        qDebug() << "draw time" << drawTimer.elapsed();
+        if (iterations--)
+            update();
+        else
+            qApp->quit();
+    }
+
+    QTime timer;
+    int frames;
+};
+
+int main(int argc, char *argv[])
+{
+    QApplication app(argc, argv);
+
+    bool sampleBuffers = false;
+
+    for (int i = 1; i < argc; ++i) {
+        QString arg = argv[i];
+        if (arg == "-test") {
+            arg = argv[++i];
+            int j = 0;
+            while (funcs[j].name) {
+                if (arg == funcs[j].name) {
+                    testFunc = funcs[j].func;
+                    qDebug() << "Running test" << arg;
+                    break;
+                }
+                ++j;
+            }
+        } else if (arg == "-iterations") {
+            arg = argv[++i];
+            iterations = arg.toInt();
+        } else if (arg == "-sampleBuffers") {
+            sampleBuffers = true;
+        }
+    }
+
+    if (testFunc == 0) {
+        qDebug() << "Usage: textspeed -test <test> [-sampleBuffers] [-iterations n]";
+        qDebug() << "where <test> can be:";
+        int j = 0;
+        while (funcs[j].name) {
+            qDebug() << "  " << funcs[j].name;
+            ++j;
+        }
+        exit(1);
+    }
+
+    QWidget w;
+    QGLFormat format = QGLFormat::defaultFormat();
+    format.setSampleBuffers(sampleBuffers);
+    MyGLWidget *glw = new MyGLWidget(format);
+    glw->setAutoFillBackground(false);
+    QVBoxLayout *layout = new QVBoxLayout(&w);
+    w.setLayout(layout);
+    layout->addWidget(glw);
+    w.showFullScreen();
+    app.exec();
+
+    return 0;
+}