2 files changed, 38 insertions, 14 deletions

diff --git a/src/gui/painting/qpainterpath.cpp b/src/gui/painting/qpainterpath.cpp
index 69e189c846..c40bcee9c0 100644
--- a/src/gui/painting/qpainterpath.cpp
+++ b/src/gui/painting/qpainterpath.cpp
@@ -688,6 +688,8 @@ void QPainterPath::lineTo(const QPointF &p)
         return;
     Element elm = { p.x(), p.y(), LineToElement };
     d->elements.append(elm);
+
+    d->convex = d->elements.size() == 3 || (d->elements.size() == 4 && d->isClosed());
 }
 
 /*!
@@ -960,6 +962,8 @@ void QPainterPath::addRect(const QRectF &r)
     ensureData();
     detach();
 
+    bool first = d_func()->elements.size() < 2;
+
     d_func()->elements.reserve(d_func()->elements.size() + 5);
     moveTo(r.x(), r.y());
 
@@ -970,6 +974,7 @@ void QPainterPath::addRect(const QRectF &r)
 
     d_func()->elements << l1 << l2 << l3 << l4;
     d_func()->require_moveTo = true;
+    d_func()->convex = first;
 }
 
 /*!
@@ -1039,6 +1044,7 @@ void QPainterPath::addEllipse(const QRectF &boundingRect)
     detach();
 
     Q_D(QPainterPath);
+    bool first = d_func()->elements.size() < 2;
     d->elements.reserve(d->elements.size() + 13);
 
     QPointF pts[12];
@@ -1051,6 +1057,8 @@ void QPainterPath::addEllipse(const QRectF &boundingRect)
     cubicTo(pts[6], pts[7], pts[8]);           // 180 -> 90
     cubicTo(pts[9], pts[10], pts[11]);         // 90 - >0
     d_func()->require_moveTo = true;
+
+    d_func()->convex = first;
 }
 
 /*!
@@ -3027,6 +3035,8 @@ void QPainterPath::addRoundedRect(const QRectF &rect, qreal xRadius, qreal yRadi
     ensureData();
     detach();
 
+    bool first = d_func()->elements.size() < 2;
+
     arcMoveTo(x, y, rxx2, ryy2, 90);
     arcTo(x, y, rxx2, ryy2, 90, 90);
     arcTo(x, y+h-ryy2, rxx2, ryy2, 2*90, 90);
@@ -3035,6 +3045,7 @@ void QPainterPath::addRoundedRect(const QRectF &rect, qreal xRadius, qreal yRadi
     closeSubpath();
 
     d_func()->require_moveTo = true;
+    d_func()->convex = first;
 }
 
 /*!
@@ -3081,6 +3092,8 @@ void QPainterPath::addRoundRect(const QRectF &r, int xRnd, int yRnd)
     ensureData();
     detach();
 
+    bool first = d_func()->elements.size() < 2;
+
     arcMoveTo(x, y, rxx2, ryy2, 90);
     arcTo(x, y, rxx2, ryy2, 90, 90);
     arcTo(x, y+h-ryy2, rxx2, ryy2, 2*90, 90);
@@ -3089,6 +3102,7 @@ void QPainterPath::addRoundRect(const QRectF &r, int xRnd, int yRnd)
     closeSubpath();
 
     d_func()->require_moveTo = true;
+    d_func()->convex = first;
 }
 
 /*!
@@ -3269,6 +3283,7 @@ void QPainterPath::setDirty(bool dirty)
     d_func()->dirtyControlBounds = dirty;
     delete d_func()->pathConverter;
     d_func()->pathConverter = 0;
+    d_func()->convex = false;
 }
 
 void QPainterPath::computeBoundingRect() const
diff --git a/src/gui/painting/qpainterpath_p.h b/src/gui/painting/qpainterpath_p.h
index fbdb9a662e..112c2bdc2f 100644
--- a/src/gui/painting/qpainterpath_p.h
+++ b/src/gui/painting/qpainterpath_p.h
@@ -81,8 +81,8 @@ class QVectorPathConverter;
 class QVectorPathConverter
 {
 public:
-    QVectorPathConverter(const QVector<QPainterPath::Element> &path, uint fillRule)
-        : pathData(path, fillRule),
+    QVectorPathConverter(const QVector<QPainterPath::Element> &path, uint fillRule, bool convex)
+        : pathData(path, fillRule, convex),
           path(pathData.points.data(), path.size(),
                pathData.elements.data(), pathData.flags) {}
 
@@ -91,7 +91,7 @@ public:
     }
 
     struct QVectorPathData {
-        QVectorPathData(const QVector<QPainterPath::Element> &path, uint fillRule)
+        QVectorPathData(const QVector<QPainterPath::Element> &path, uint fillRule, bool convex)
             : elements(path.size()),
               points(path.size() * 2),
               flags(0)
@@ -111,6 +111,8 @@ public:
             else
                 flags |= QVectorPath::OddEvenFill;
 
+            if (!convex)
+                flags |= QVectorPath::NonConvexShapeMask;
         }
         QVarLengthArray<QPainterPath::ElementType> elements;
         QVarLengthArray<qreal> points;
@@ -128,20 +130,26 @@ class QPainterPathData : public QPainterPathPrivate
 {
 public:
     QPainterPathData() :
-        cStart(0), fillRule(Qt::OddEvenFill),
-        dirtyBounds(false), dirtyControlBounds(false),
-        pathConverter(0)
+        cStart(0),
+        fillRule(Qt::OddEvenFill),
+        pathConverter(0),
+        dirtyBounds(false),
+        dirtyControlBounds(false)
+
     {
         ref = 1;
         require_moveTo = false;
+        convex = false;
     }
 
     QPainterPathData(const QPainterPathData &other) :
         QPainterPathPrivate(), cStart(other.cStart), fillRule(other.fillRule),
-        dirtyBounds(other.dirtyBounds), bounds(other.bounds),
-        dirtyControlBounds(other.dirtyControlBounds),
+        bounds(other.bounds),
         controlBounds(other.controlBounds),
-        pathConverter(0)
+        pathConverter(0),
+        dirtyBounds(other.dirtyBounds),
+        dirtyControlBounds(other.dirtyControlBounds),
+        convex(other.convex)
     {
         ref = 1;
         require_moveTo = false;
@@ -158,20 +166,21 @@ public:
 
     const QVectorPath &vectorPath() {
         if (!pathConverter)
-            pathConverter = new QVectorPathConverter(elements, fillRule);
+            pathConverter = new QVectorPathConverter(elements, fillRule, convex);
         return pathConverter->path;
     }
 
     int cStart;
     Qt::FillRule fillRule;
 
-    bool require_moveTo;
-
-    bool   dirtyBounds;
     QRectF bounds;
-    bool   dirtyControlBounds;
     QRectF controlBounds;
 
+    uint require_moveTo : 1;
+    uint dirtyBounds : 1;
+    uint dirtyControlBounds : 1;
+    uint convex : 1;
+
     QVectorPathConverter *pathConverter;
 };