/****************************************************************************+
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**+
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** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).+
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** All rights reserved.+
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** Contact: Nokia Corporation (qt-info@nokia.com)+
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**+
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** This file is part of the QtGui module of the Qt Toolkit.+
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**+
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** $QT_BEGIN_LICENSE:LGPL$+
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** No Commercial Usage+
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** This file contains pre-release code and may not be distributed.+
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** You may use this file in accordance with the terms and conditions+
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** contained in the Technology Preview License Agreement accompanying+
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** this package.+
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**+
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** GNU Lesser General Public License Usage+
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** Alternatively, this file may be used under the terms of the GNU Lesser+
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** General Public License version 2.1 as published by the Free Software+
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** Foundation and appearing in the file LICENSE.LGPL included in the+
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** packaging of this file.  Please review the following information to+
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** ensure the GNU Lesser General Public License version 2.1 requirements+
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** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.+
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**+
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** In addition, as a special exception, Nokia gives you certain additional+
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** rights.  These rights are described in the Nokia Qt LGPL Exception+
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.+
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**+
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** If you have questions regarding the use of this file, please contact+
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** Nokia at qt-info@nokia.com.+
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**+
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**+
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**+
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**+
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**+
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**+
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**+
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**+
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** $QT_END_LICENSE$+
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**+
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****************************************************************************/+
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+
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#include <private/qt_mac_p.h>+
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#include "qcoreapplication.h"+
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#include <qlibrary.h>+
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+
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QT_BEGIN_NAMESPACE+
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+
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QRegion::QRegionData QRegion::shared_empty = { Q_BASIC_ATOMIC_INITIALIZER(1), 0 };+
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+
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#if defined(Q_WS_MAC32) && !defined(QT_MAC_USE_COCOA)+
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#define RGN_CACHE_SIZE 200+
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#ifdef RGN_CACHE_SIZE+
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static bool rgncache_init = false;+
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static int rgncache_used;+
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static RgnHandle rgncache[RGN_CACHE_SIZE];+
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static void qt_mac_cleanup_rgncache()+
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{+
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    rgncache_init = false;+
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    for(int i = 0; i < RGN_CACHE_SIZE; ++i) {+
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        if(rgncache[i]) {+
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            --rgncache_used;+
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            DisposeRgn(rgncache[i]);+
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            rgncache[i] = 0;+
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        }+
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    }+
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}+
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#endif+
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+
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Q_GUI_EXPORT RgnHandle qt_mac_get_rgn()+
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{+
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#ifdef RGN_CACHE_SIZE+
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    if(!rgncache_init) {+
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        rgncache_used = 0;+
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        rgncache_init = true;+
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        for(int i = 0; i < RGN_CACHE_SIZE; ++i)+
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            rgncache[i] = 0;+
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        qAddPostRoutine(qt_mac_cleanup_rgncache);+
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    } else if(rgncache_used) {+
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        for(int i = 0; i < RGN_CACHE_SIZE; ++i) {+
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            if(rgncache[i]) {+
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                RgnHandle ret = rgncache[i];+
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                SetEmptyRgn(ret);+
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                rgncache[i] = 0;+
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                --rgncache_used;+
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                return ret;+
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            }+
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        }+
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    }+
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#endif+
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    return NewRgn();+
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}+
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+
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Q_GUI_EXPORT void qt_mac_dispose_rgn(RgnHandle r)+
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{+
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#ifdef RGN_CACHE_SIZE+
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    if(rgncache_init && rgncache_used < RGN_CACHE_SIZE) {+
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        for(int i = 0; i < RGN_CACHE_SIZE; ++i) {+
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            if(!rgncache[i]) {+
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                ++rgncache_used;+
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                rgncache[i] = r;+
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                return;+
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            }+
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        }+
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    }+
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#endif+
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    DisposeRgn(r);+
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}+
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+
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static OSStatus qt_mac_get_rgn_rect(UInt16 msg, RgnHandle, const Rect *rect, void *reg)+
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{+
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    if(msg == kQDRegionToRectsMsgParse) {+
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        QRect rct(rect->left, rect->top, (rect->right - rect->left), (rect->bottom - rect->top));+
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        if(!rct.isEmpty())+
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            *((QRegion *)reg) += rct;+
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    }+
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    return noErr;+
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}+
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+
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Q_GUI_EXPORT QRegion qt_mac_convert_mac_region(RgnHandle rgn)+
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{+
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    return QRegion::fromQDRgn(rgn);+
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}+
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+
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QRegion QRegion::fromQDRgn(RgnHandle rgn)+
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{+
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    QRegion ret;+
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    ret.detach();+
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    OSStatus oss = QDRegionToRects(rgn, kQDParseRegionFromTopLeft, qt_mac_get_rgn_rect, (void *)&ret);+
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    if(oss != noErr)+
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        return QRegion();+
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    return ret;+
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}+
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+
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/*!+
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    \internal+
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     Create's a RegionHandle, it's the caller's responsibility to release.+
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*/+
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RgnHandle QRegion::toQDRgn() const+
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{+
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    RgnHandle rgnHandle = qt_mac_get_rgn();+
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    if(d->qt_rgn && d->qt_rgn->numRects) {+
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        RgnHandle tmp_rgn = qt_mac_get_rgn();+
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        int n = d->qt_rgn->numRects;+
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        const QRect *qt_r = (n == 1) ? &d->qt_rgn->extents : d->qt_rgn->rects.constData();+
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        while (n--) {+
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            SetRectRgn(tmp_rgn,+
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                       qMax(SHRT_MIN, qt_r->x()),+
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                       qMax(SHRT_MIN, qt_r->y()),+
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                       qMin(SHRT_MAX, qt_r->right() + 1),+
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                       qMin(SHRT_MAX, qt_r->bottom() + 1));+
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            UnionRgn(rgnHandle, tmp_rgn, rgnHandle);+
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            ++qt_r;+
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        }+
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        qt_mac_dispose_rgn(tmp_rgn);+
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    }+
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    return rgnHandle;+
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}+
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+
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/*!+
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    \internal+
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     Create's a RegionHandle, it's the caller's responsibility to release.+
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     Returns 0 if the QRegion overflows.+
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*/+
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RgnHandle QRegion::toQDRgnForUpdate_sys() const+
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{+
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    RgnHandle rgnHandle = qt_mac_get_rgn();+
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    if(d->qt_rgn && d->qt_rgn->numRects) {+
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        RgnHandle tmp_rgn = qt_mac_get_rgn();+
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        int n = d->qt_rgn->numRects;+
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        const QRect *qt_r = (n == 1) ? &d->qt_rgn->extents : d->qt_rgn->rects.constData();+
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        while (n--) {+
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+
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            // detect overflow. Tested for use with HIViewSetNeedsDisplayInRegion+
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            // in QWidgetPrivate::update_sys().+
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            enum { HIViewSetNeedsDisplayInRegionOverflow = 10000 }; // empirically determined conservative value+
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            if (qt_r->right() > HIViewSetNeedsDisplayInRegionOverflow || qt_r->bottom() > HIViewSetNeedsDisplayInRegionOverflow) {+
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                qt_mac_dispose_rgn(tmp_rgn);+
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                qt_mac_dispose_rgn(rgnHandle);+
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                return 0;+
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            }+
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+
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            SetRectRgn(tmp_rgn,+
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                       qMax(SHRT_MIN, qt_r->x()),+
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                       qMax(SHRT_MIN, qt_r->y()),+
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                       qMin(SHRT_MAX, qt_r->right() + 1),+
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                       qMin(SHRT_MAX, qt_r->bottom() + 1));+
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            UnionRgn(rgnHandle, tmp_rgn, rgnHandle);+
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            ++qt_r;+
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        }+
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        qt_mac_dispose_rgn(tmp_rgn);+
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    }+
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    return rgnHandle;+
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}+
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+
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#endif+
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+
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#if (MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_5)+
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OSStatus QRegion::shape2QRegionHelper(int inMessage, HIShapeRef,+
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                                      const CGRect *inRect, void *inRefcon)+
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{+
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    QRegion *region = static_cast<QRegion *>(inRefcon);+
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    if (!region)+
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        return paramErr;+
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+
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    switch (inMessage) {+
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    case kHIShapeEnumerateRect:+
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        *region += QRect(inRect->origin.x, inRect->origin.y,+
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                         inRect->size.width, inRect->size.height);+
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        break;+
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    case kHIShapeEnumerateInit:+
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        // Assume the region is already setup correctly+
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    case kHIShapeEnumerateTerminate:+
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    default:+
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        break;+
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    }+
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    return noErr;+
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}+
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#endif+
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+
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/*!+
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    \internal+
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     Create's a mutable shape, it's the caller's responsibility to release.+
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     WARNING: this function clamps the coordinates to SHRT_MIN/MAX on 10.4 and below.+
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*/+
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HIMutableShapeRef QRegion::toHIMutableShape() const+
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{+
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    HIMutableShapeRef shape = HIShapeCreateMutable();+
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#if (MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_5)+
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    if (QSysInfo::MacintoshVersion >= QSysInfo::MV_10_5) {+
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        if (d->qt_rgn && d->qt_rgn->numRects) {+
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            int n = d->qt_rgn->numRects;+
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            const QRect *qt_r = (n == 1) ? &d->qt_rgn->extents : d->qt_rgn->rects.constData();+
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            while (n--) {+
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                CGRect cgRect = CGRectMake(qt_r->x(), qt_r->y(), qt_r->width(), qt_r->height());+
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                HIShapeUnionWithRect(shape, &cgRect);+
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                ++qt_r;+
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            }+
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        }+
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    } else+
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#endif+
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    {+
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#ifndef QT_MAC_USE_COCOA+
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        QCFType<HIShapeRef> qdShape = HIShapeCreateWithQDRgn(QMacSmartQuickDrawRegion(toQDRgn()));+
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        HIShapeUnion(qdShape, shape, shape);+
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#endif+
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    }+
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    return shape;+
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}+
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+
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#if !defined(Q_WS_MAC64) && !defined(QT_MAC_USE_COCOA)+
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typedef OSStatus (*PtrHIShapeGetAsQDRgn)(HIShapeRef, RgnHandle);+
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static PtrHIShapeGetAsQDRgn ptrHIShapeGetAsQDRgn = 0;+
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#endif+
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+
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+
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QRegion QRegion::fromHIShapeRef(HIShapeRef shape)+
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{+
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    QRegion returnRegion;+
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    returnRegion.detach();+
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    // Begin gratuitous #if-defery+
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#if (MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_5)+
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# ifndef Q_WS_MAC64+
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    if (QSysInfo::MacintoshVersion >= QSysInfo::MV_10_5) {+
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# endif+
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        HIShapeEnumerate(shape, kHIShapeParseFromTopLeft, shape2QRegionHelper, &returnRegion);+
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# ifndef Q_WS_MAC64+
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    } else+
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# endif+
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#endif+
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    {+
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#if !defined(Q_WS_MAC64) && !defined(QT_MAC_USE_COCOA)+
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        if (ptrHIShapeGetAsQDRgn == 0) {+
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            QLibrary library(QLatin1String("/System/Library/Frameworks/Carbon.framework/Carbon"));+
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            library.setLoadHints(QLibrary::ExportExternalSymbolsHint);+
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                    ptrHIShapeGetAsQDRgn = reinterpret_cast<PtrHIShapeGetAsQDRgn>(library.resolve("HIShapeGetAsQDRgn"));+
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        }+
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        RgnHandle rgn = qt_mac_get_rgn();+
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        ptrHIShapeGetAsQDRgn(shape, rgn);+
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        returnRegion = QRegion::fromQDRgn(rgn);+
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        qt_mac_dispose_rgn(rgn);+
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#endif+
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    }+
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    return returnRegion;+
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}+
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+
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QT_END_NAMESPACE+
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