--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/gui/painting/qregion_win.cpp	Mon Jan 11 14:00:40 2010 +0000
@@ -0,0 +1,149 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the QtGui module 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 "qatomic.h"
+#include "qbitmap.h"
+#include "qbuffer.h"
+#include "qimage.h"
+#include "qpolygon.h"
+#include "qregion.h"
+#include "qt_windows.h"
+#include "qpainterpath.h"
+
+QT_BEGIN_NAMESPACE
+
+QRegion::QRegionData QRegion::shared_empty = { Q_BASIC_ATOMIC_INITIALIZER(1), 0, 0 };
+
+HRGN qt_tryCreateRegion(QRegion::RegionType type, int left, int top, int right, int bottom)
+{
+    const int tries = 10;
+    for (int i = 0; i < tries; ++i) {
+        HRGN region = 0;
+        switch (type) {
+        case QRegion::Rectangle:
+            region = CreateRectRgn(left, top, right, bottom);
+            break;
+        case QRegion::Ellipse:
+#ifndef Q_OS_WINCE
+            region = CreateEllipticRgn(left, top, right, bottom);
+#endif
+            break;
+        }
+        if (region) {
+            if (GetRegionData(region, 0, 0))
+                return region;
+            else
+                DeleteObject(region);
+        }
+    }
+    return 0;
+}
+
+QRegion qt_region_from_HRGN(HRGN rgn)
+{
+    int numBytes = GetRegionData(rgn, 0, 0);
+    if (numBytes == 0)
+        return QRegion();
+
+    char *buf = new char[numBytes];
+    if (buf == 0)
+        return QRegion();
+
+    RGNDATA *rd = reinterpret_cast<RGNDATA*>(buf);
+    if (GetRegionData(rgn, numBytes, rd) == 0) {
+        delete [] buf;
+        return QRegion();
+    }
+
+    QRegion region;
+    RECT *r = reinterpret_cast<RECT*>(rd->Buffer);
+    for (uint i = 0; i < rd->rdh.nCount; ++i) {
+        QRect rect;
+        rect.setCoords(r->left, r->top, r->right - 1, r->bottom - 1);
+        ++r;
+        region |= rect;
+    }
+
+    delete [] buf;
+
+    return region;
+}
+
+void qt_win_dispose_rgn(HRGN r)
+{
+    if (r)
+        DeleteObject(r);
+}
+
+static void qt_add_rect(HRGN &winRegion, QRect r)
+{
+    HRGN rgn = CreateRectRgn(r.left(), r.top(), r.x() + r.width(), r.y() + r.height());
+    if (rgn) {
+        HRGN dest = CreateRectRgn(0,0,0,0);
+        int result = CombineRgn(dest, winRegion, rgn, RGN_OR);
+        if (result) {
+            DeleteObject(winRegion);
+            winRegion = dest;
+        }
+        DeleteObject(rgn);
+    }
+}
+
+void QRegion::ensureHandle() const
+{
+    if (d->rgn)
+        DeleteObject(d->rgn);
+    d->rgn = CreateRectRgn(0,0,0,0);
+    if (d->qt_rgn) {
+        if (d->qt_rgn->numRects == 1) {
+            QRect r = d->qt_rgn->extents;
+            qt_add_rect(d->rgn, r);
+            return;
+        }
+        for (int i = 0;i < d->qt_rgn->numRects;i++) {
+            QRect r = d->qt_rgn->rects.at(i);
+            qt_add_rect(d->rgn, r);
+        }
+    }
+}
+
+
+QT_END_NAMESPACE