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diff --git a/src/widgets/platforms/mac/qregion_mac.cpp b/src/widgets/platforms/mac/qregion_mac.cpp
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+/****************************************************************************
+**
+** Copyright (C) 2011 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.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** GNU Lesser General Public License Usage
+** 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.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU General
+** Public License version 3.0 as published by the Free Software Foundation
+** and appearing in the file LICENSE.GPL included in the packaging of this
+** file. Please review the following information to ensure the GNU General
+** Public License version 3.0 requirements will be met:
+** http://www.gnu.org/copyleft/gpl.html.
+**
+** Other Usage
+** Alternatively, this file may be used in accordance with the terms and
+** conditions contained in a signed written agreement between you and Nokia.
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include <private/qt_mac_p.h>
+#include "qcoreapplication.h"
+#include <qlibrary.h>
+
+QT_BEGIN_NAMESPACE
+
+QRegion::QRegionData QRegion::shared_empty = { Q_BASIC_ATOMIC_INITIALIZER(1), 0 };
+
+#if defined(Q_WS_MAC32) && !defined(QT_MAC_USE_COCOA)
+#define RGN_CACHE_SIZE 200
+#ifdef RGN_CACHE_SIZE
+static bool rgncache_init = false;
+static int rgncache_used;
+static RgnHandle rgncache[RGN_CACHE_SIZE];
+static void qt_mac_cleanup_rgncache()
+{
+ rgncache_init = false;
+ for(int i = 0; i < RGN_CACHE_SIZE; ++i) {
+ if(rgncache[i]) {
+ --rgncache_used;
+ DisposeRgn(rgncache[i]);
+ rgncache[i] = 0;
+ }
+ }
+}
+#endif
+
+Q_GUI_EXPORT RgnHandle qt_mac_get_rgn()
+{
+#ifdef RGN_CACHE_SIZE
+ if(!rgncache_init) {
+ rgncache_used = 0;
+ rgncache_init = true;
+ for(int i = 0; i < RGN_CACHE_SIZE; ++i)
+ rgncache[i] = 0;
+ qAddPostRoutine(qt_mac_cleanup_rgncache);
+ } else if(rgncache_used) {
+ for(int i = 0; i < RGN_CACHE_SIZE; ++i) {
+ if(rgncache[i]) {
+ RgnHandle ret = rgncache[i];
+ SetEmptyRgn(ret);
+ rgncache[i] = 0;
+ --rgncache_used;
+ return ret;
+ }
+ }
+ }
+#endif
+ return NewRgn();
+}
+
+Q_GUI_EXPORT void qt_mac_dispose_rgn(RgnHandle r)
+{
+#ifdef RGN_CACHE_SIZE
+ if(rgncache_init && rgncache_used < RGN_CACHE_SIZE) {
+ for(int i = 0; i < RGN_CACHE_SIZE; ++i) {
+ if(!rgncache[i]) {
+ ++rgncache_used;
+ rgncache[i] = r;
+ return;
+ }
+ }
+ }
+#endif
+ DisposeRgn(r);
+}
+
+static OSStatus qt_mac_get_rgn_rect(UInt16 msg, RgnHandle, const Rect *rect, void *reg)
+{
+ if(msg == kQDRegionToRectsMsgParse) {
+ QRect rct(rect->left, rect->top, (rect->right - rect->left), (rect->bottom - rect->top));
+ if(!rct.isEmpty())
+ *((QRegion *)reg) += rct;
+ }
+ return noErr;
+}
+
+Q_GUI_EXPORT QRegion qt_mac_convert_mac_region(RgnHandle rgn)
+{
+ return QRegion::fromQDRgn(rgn);
+}
+
+QRegion QRegion::fromQDRgn(RgnHandle rgn)
+{
+ QRegion ret;
+ ret.detach();
+ OSStatus oss = QDRegionToRects(rgn, kQDParseRegionFromTopLeft, qt_mac_get_rgn_rect, (void *)&ret);
+ if(oss != noErr)
+ return QRegion();
+ return ret;
+}
+
+/*!
+ \internal
+ Create's a RegionHandle, it's the caller's responsibility to release.
+*/
+RgnHandle QRegion::toQDRgn() const
+{
+ RgnHandle rgnHandle = qt_mac_get_rgn();
+ if(d->qt_rgn && d->qt_rgn->numRects) {
+ RgnHandle tmp_rgn = qt_mac_get_rgn();
+ int n = d->qt_rgn->numRects;
+ const QRect *qt_r = (n == 1) ? &d->qt_rgn->extents : d->qt_rgn->rects.constData();
+ while (n--) {
+ SetRectRgn(tmp_rgn,
+ qMax(SHRT_MIN, qt_r->x()),
+ qMax(SHRT_MIN, qt_r->y()),
+ qMin(SHRT_MAX, qt_r->right() + 1),
+ qMin(SHRT_MAX, qt_r->bottom() + 1));
+ UnionRgn(rgnHandle, tmp_rgn, rgnHandle);
+ ++qt_r;
+ }
+ qt_mac_dispose_rgn(tmp_rgn);
+ }
+ return rgnHandle;
+}
+
+/*!
+ \internal
+ Create's a RegionHandle, it's the caller's responsibility to release.
+ Returns 0 if the QRegion overflows.
+*/
+RgnHandle QRegion::toQDRgnForUpdate_sys() const
+{
+ RgnHandle rgnHandle = qt_mac_get_rgn();
+ if(d->qt_rgn && d->qt_rgn->numRects) {
+ RgnHandle tmp_rgn = qt_mac_get_rgn();
+ int n = d->qt_rgn->numRects;
+ const QRect *qt_r = (n == 1) ? &d->qt_rgn->extents : d->qt_rgn->rects.constData();
+ while (n--) {
+
+ // detect overflow. Tested for use with HIViewSetNeedsDisplayInRegion
+ // in QWidgetPrivate::update_sys().
+ enum { HIViewSetNeedsDisplayInRegionOverflow = 10000 }; // empirically determined conservative value
+ if (qt_r->right() > HIViewSetNeedsDisplayInRegionOverflow || qt_r->bottom() > HIViewSetNeedsDisplayInRegionOverflow) {
+ qt_mac_dispose_rgn(tmp_rgn);
+ qt_mac_dispose_rgn(rgnHandle);
+ return 0;
+ }
+
+ SetRectRgn(tmp_rgn,
+ qMax(SHRT_MIN, qt_r->x()),
+ qMax(SHRT_MIN, qt_r->y()),
+ qMin(SHRT_MAX, qt_r->right() + 1),
+ qMin(SHRT_MAX, qt_r->bottom() + 1));
+ UnionRgn(rgnHandle, tmp_rgn, rgnHandle);
+ ++qt_r;
+ }
+ qt_mac_dispose_rgn(tmp_rgn);
+ }
+ return rgnHandle;
+}
+
+#endif
+
+#if (MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_5)
+OSStatus QRegion::shape2QRegionHelper(int inMessage, HIShapeRef,
+ const CGRect *inRect, void *inRefcon)
+{
+ QRegion *region = static_cast<QRegion *>(inRefcon);
+ if (!region)
+ return paramErr;
+
+ switch (inMessage) {
+ case kHIShapeEnumerateRect:
+ *region += QRect(inRect->origin.x, inRect->origin.y,
+ inRect->size.width, inRect->size.height);
+ break;
+ case kHIShapeEnumerateInit:
+ // Assume the region is already setup correctly
+ case kHIShapeEnumerateTerminate:
+ default:
+ break;
+ }
+ return noErr;
+}
+#endif
+
+/*!
+ \internal
+ Create's a mutable shape, it's the caller's responsibility to release.
+ WARNING: this function clamps the coordinates to SHRT_MIN/MAX on 10.4 and below.
+*/
+HIMutableShapeRef QRegion::toHIMutableShape() const
+{
+ HIMutableShapeRef shape = HIShapeCreateMutable();
+#if (MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_5)
+ if (QSysInfo::MacintoshVersion >= QSysInfo::MV_10_5) {
+ if (d->qt_rgn && d->qt_rgn->numRects) {
+ int n = d->qt_rgn->numRects;
+ const QRect *qt_r = (n == 1) ? &d->qt_rgn->extents : d->qt_rgn->rects.constData();
+ while (n--) {
+ CGRect cgRect = CGRectMake(qt_r->x(), qt_r->y(), qt_r->width(), qt_r->height());
+ HIShapeUnionWithRect(shape, &cgRect);
+ ++qt_r;
+ }
+ }
+ } else
+#endif
+ {
+#ifndef QT_MAC_USE_COCOA
+ QCFType<HIShapeRef> qdShape = HIShapeCreateWithQDRgn(QMacSmartQuickDrawRegion(toQDRgn()));
+ HIShapeUnion(qdShape, shape, shape);
+#endif
+ }
+ return shape;
+}
+
+#if !defined(Q_WS_MAC64) && !defined(QT_MAC_USE_COCOA)
+typedef OSStatus (*PtrHIShapeGetAsQDRgn)(HIShapeRef, RgnHandle);
+static PtrHIShapeGetAsQDRgn ptrHIShapeGetAsQDRgn = 0;
+#endif
+
+
+QRegion QRegion::fromHIShapeRef(HIShapeRef shape)
+{
+ QRegion returnRegion;
+ returnRegion.detach();
+ // Begin gratuitous #if-defery
+#if (MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_5)
+# ifndef Q_WS_MAC64
+ if (QSysInfo::MacintoshVersion >= QSysInfo::MV_10_5) {
+# endif
+ HIShapeEnumerate(shape, kHIShapeParseFromTopLeft, shape2QRegionHelper, &returnRegion);
+# ifndef Q_WS_MAC64
+ } else
+# endif
+#endif
+ {
+#if !defined(Q_WS_MAC64) && !defined(QT_MAC_USE_COCOA)
+ if (ptrHIShapeGetAsQDRgn == 0) {
+ QLibrary library(QLatin1String("/System/Library/Frameworks/Carbon.framework/Carbon"));
+ library.setLoadHints(QLibrary::ExportExternalSymbolsHint);
+ ptrHIShapeGetAsQDRgn = reinterpret_cast<PtrHIShapeGetAsQDRgn>(library.resolve("HIShapeGetAsQDRgn"));
+ }
+ RgnHandle rgn = qt_mac_get_rgn();
+ ptrHIShapeGetAsQDRgn(shape, rgn);
+ returnRegion = QRegion::fromQDRgn(rgn);
+ qt_mac_dispose_rgn(rgn);
+#endif
+ }
+ return returnRegion;
+}
+
+QT_END_NAMESPACE
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