From 21958b48caca3423320f3e5e0e83096ca46b4d40 Mon Sep 17 00:00:00 2001
From: Bjoern Erik Nilsen <bjorn.nilsen@nokia.com>
Date: Wed, 29 Apr 2009 17:34:48 +0200
Subject: QTransform::map(const QRegion&) cut-off for single rect regions.

Avoid QRegion<->QPainterPath conversion if possible.

Reviewed-by: Samuel
---
 src/gui/painting/qtransform.cpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/gui/painting/qtransform.cpp b/src/gui/painting/qtransform.cpp
index af27fd5..2383272 100644
--- a/src/gui/painting/qtransform.cpp
+++ b/src/gui/painting/qtransform.cpp
@@ -1317,12 +1317,16 @@ QRegion QTransform::map(const QRegion &r) const
     TransformationType t = type();
     if (t == TxNone)
         return r;
+
     if (t == TxTranslate) {
         QRegion copy(r);
         copy.translate(qRound(affine._dx), qRound(affine._dy));
         return copy;
     }
 
+    if (t == TxScale && r.numRects() == 1)
+        return QRegion(mapRect(r.boundingRect()));
+
     QPainterPath p = map(qt_regionToPath(r));
     return p.toFillPolygon(QTransform()).toPolygon();
 }
-- 
cgit v0.12