1 /****************************************************************************

     2 **

     3 ** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).

     4 ** All rights reserved.

     5 ** Contact: Nokia Corporation (qt-info@nokia.com)

     6 **

     7 ** This file is part of the QtGui module of the Qt Toolkit.

     8 **

     9 ** $QT_BEGIN_LICENSE:LGPL$

    10 ** No Commercial Usage

    11 ** This file contains pre-release code and may not be distributed.

    12 ** You may use this file in accordance with the terms and conditions

    13 ** contained in the Technology Preview License Agreement accompanying

    14 ** this package.

    15 **

    16 ** GNU Lesser General Public License Usage

    17 ** Alternatively, this file may be used under the terms of the GNU Lesser

    18 ** General Public License version 2.1 as published by the Free Software

    19 ** Foundation and appearing in the file LICENSE.LGPL included in the

    20 ** packaging of this file.  Please review the following information to

    21 ** ensure the GNU Lesser General Public License version 2.1 requirements

    22 ** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.

    23 **

    24 ** In addition, as a special exception, Nokia gives you certain additional

    25 ** rights.  These rights are described in the Nokia Qt LGPL Exception

    26 ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.

    27 **

    28 ** If you have questions regarding the use of this file, please contact

    29 ** Nokia at qt-info@nokia.com.

    30 **

    31 **

    32 **

    33 **

    34 **

    35 **

    36 **

    37 **

    38 ** $QT_END_LICENSE$

    39 **

    40 ****************************************************************************/

    41 

    42 #include <private/qt_mac_p.h>

    43 #include "qcoreapplication.h"

    44 #include <qlibrary.h>

    45 

    46 QT_BEGIN_NAMESPACE

    47 

    48 QRegion::QRegionData QRegion::shared_empty = { Q_BASIC_ATOMIC_INITIALIZER(1), 0 };

    49 

    50 #if defined(Q_WS_MAC32) && !defined(QT_MAC_USE_COCOA)

    51 #define RGN_CACHE_SIZE 200

    52 #ifdef RGN_CACHE_SIZE

    53 static bool rgncache_init = false;

    54 static int rgncache_used;

    55 static RgnHandle rgncache[RGN_CACHE_SIZE];

    56 static void qt_mac_cleanup_rgncache()

    57 {

    58     rgncache_init = false;

    59     for(int i = 0; i < RGN_CACHE_SIZE; ++i) {

    60         if(rgncache[i]) {

    61             --rgncache_used;

    62             DisposeRgn(rgncache[i]);

    63             rgncache[i] = 0;

    64         }

    65     }

    66 }

    67 #endif

    68 

    69 Q_GUI_EXPORT RgnHandle qt_mac_get_rgn()

    70 {

    71 #ifdef RGN_CACHE_SIZE

    72     if(!rgncache_init) {

    73         rgncache_used = 0;

    74         rgncache_init = true;

    75         for(int i = 0; i < RGN_CACHE_SIZE; ++i)

    76             rgncache[i] = 0;

    77         qAddPostRoutine(qt_mac_cleanup_rgncache);

    78     } else if(rgncache_used) {

    79         for(int i = 0; i < RGN_CACHE_SIZE; ++i) {

    80             if(rgncache[i]) {

    81                 RgnHandle ret = rgncache[i];

    82                 SetEmptyRgn(ret);

    83                 rgncache[i] = 0;

    84                 --rgncache_used;

    85                 return ret;

    86             }

    87         }

    88     }

    89 #endif

    90     return NewRgn();

    91 }

    92 

    93 Q_GUI_EXPORT void qt_mac_dispose_rgn(RgnHandle r)

    94 {

    95 #ifdef RGN_CACHE_SIZE

    96     if(rgncache_init && rgncache_used < RGN_CACHE_SIZE) {

    97         for(int i = 0; i < RGN_CACHE_SIZE; ++i) {

    98             if(!rgncache[i]) {

    99                 ++rgncache_used;

   100                 rgncache[i] = r;

   101                 return;

   102             }

   103         }

   104     }

   105 #endif

   106     DisposeRgn(r);

   107 }

   108 

   109 static OSStatus qt_mac_get_rgn_rect(UInt16 msg, RgnHandle, const Rect *rect, void *reg)

   110 {

   111     if(msg == kQDRegionToRectsMsgParse) {

   112         QRect rct(rect->left, rect->top, (rect->right - rect->left), (rect->bottom - rect->top));

   113         if(!rct.isEmpty())

   114             *((QRegion *)reg) += rct;

   115     }

   116     return noErr;

   117 }

   118 

   119 Q_GUI_EXPORT QRegion qt_mac_convert_mac_region(RgnHandle rgn)

   120 {

   121     return QRegion::fromQDRgn(rgn);

   122 }

   123 

   124 QRegion QRegion::fromQDRgn(RgnHandle rgn)

   125 {

   126     QRegion ret;

   127     ret.detach();

   128     OSStatus oss = QDRegionToRects(rgn, kQDParseRegionFromTopLeft, qt_mac_get_rgn_rect, (void *)&ret);

   129     if(oss != noErr)

   130         return QRegion();

   131     return ret;

   132 }

   133 

   134 /*!

   135     \internal

   136      Create's a RegionHandle, it's the caller's responsibility to release.

   137 */

   138 RgnHandle QRegion::toQDRgn() const

   139 {

   140     RgnHandle rgnHandle = qt_mac_get_rgn();

   141     if(d->qt_rgn && d->qt_rgn->numRects) {

   142         RgnHandle tmp_rgn = qt_mac_get_rgn();

   143         int n = d->qt_rgn->numRects;

   144         const QRect *qt_r = (n == 1) ? &d->qt_rgn->extents : d->qt_rgn->rects.constData();

   145         while (n--) {

   146             SetRectRgn(tmp_rgn,

   147                        qMax(SHRT_MIN, qt_r->x()),

   148                        qMax(SHRT_MIN, qt_r->y()),

   149                        qMin(SHRT_MAX, qt_r->right() + 1),

   150                        qMin(SHRT_MAX, qt_r->bottom() + 1));

   151             UnionRgn(rgnHandle, tmp_rgn, rgnHandle);

   152             ++qt_r;

   153         }

   154         qt_mac_dispose_rgn(tmp_rgn);

   155     }

   156     return rgnHandle;

   157 }

   158 

   159 /*!

   160     \internal

   161      Create's a RegionHandle, it's the caller's responsibility to release.

   162      Returns 0 if the QRegion overflows.

   163 */

   164 RgnHandle QRegion::toQDRgnForUpdate_sys() const

   165 {

   166     RgnHandle rgnHandle = qt_mac_get_rgn();

   167     if(d->qt_rgn && d->qt_rgn->numRects) {

   168         RgnHandle tmp_rgn = qt_mac_get_rgn();

   169         int n = d->qt_rgn->numRects;

   170         const QRect *qt_r = (n == 1) ? &d->qt_rgn->extents : d->qt_rgn->rects.constData();

   171         while (n--) {

   172 

   173             // detect overflow. Tested for use with HIViewSetNeedsDisplayInRegion

   174             // in QWidgetPrivate::update_sys().

   175             enum { HIViewSetNeedsDisplayInRegionOverflow = 10000 }; // empirically determined conservative value

   176             if (qt_r->right() > HIViewSetNeedsDisplayInRegionOverflow || qt_r->bottom() > HIViewSetNeedsDisplayInRegionOverflow) {

   177                 qt_mac_dispose_rgn(tmp_rgn);

   178                 qt_mac_dispose_rgn(rgnHandle);

   179                 return 0;

   180             }

   181 

   182             SetRectRgn(tmp_rgn,

   183                        qMax(SHRT_MIN, qt_r->x()),

   184                        qMax(SHRT_MIN, qt_r->y()),

   185                        qMin(SHRT_MAX, qt_r->right() + 1),

   186                        qMin(SHRT_MAX, qt_r->bottom() + 1));

   187             UnionRgn(rgnHandle, tmp_rgn, rgnHandle);

   188             ++qt_r;

   189         }

   190         qt_mac_dispose_rgn(tmp_rgn);

   191     }

   192     return rgnHandle;

   193 }

   194 

   195 #endif

   196 

   197 #if (MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_5)

   198 OSStatus QRegion::shape2QRegionHelper(int inMessage, HIShapeRef,

   199                                       const CGRect *inRect, void *inRefcon)

   200 {

   201     QRegion *region = static_cast<QRegion *>(inRefcon);

   202     if (!region)

   203         return paramErr;

   204 

   205     switch (inMessage) {

   206     case kHIShapeEnumerateRect:

   207         *region += QRect(inRect->origin.x, inRect->origin.y,

   208                          inRect->size.width, inRect->size.height);

   209         break;

   210     case kHIShapeEnumerateInit:

   211         // Assume the region is already setup correctly

   212     case kHIShapeEnumerateTerminate:

   213     default:

   214         break;

   215     }

   216     return noErr;

   217 }

   218 #endif

   219 

   220 /*!

   221     \internal

   222      Create's a mutable shape, it's the caller's responsibility to release.

   223      WARNING: this function clamps the coordinates to SHRT_MIN/MAX on 10.4 and below.

   224 */

   225 HIMutableShapeRef QRegion::toHIMutableShape() const

   226 {

   227     HIMutableShapeRef shape = HIShapeCreateMutable();

   228 #if (MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_5)

   229     if (QSysInfo::MacintoshVersion >= QSysInfo::MV_10_5) {

   230         if (d->qt_rgn && d->qt_rgn->numRects) {

   231             int n = d->qt_rgn->numRects;

   232             const QRect *qt_r = (n == 1) ? &d->qt_rgn->extents : d->qt_rgn->rects.constData();

   233             while (n--) {

   234                 CGRect cgRect = CGRectMake(qt_r->x(), qt_r->y(), qt_r->width(), qt_r->height());

   235                 HIShapeUnionWithRect(shape, &cgRect);

   236                 ++qt_r;

   237             }

   238         }

   239     } else

   240 #endif

   241     {

   242 #ifndef QT_MAC_USE_COCOA

   243         QCFType<HIShapeRef> qdShape = HIShapeCreateWithQDRgn(QMacSmartQuickDrawRegion(toQDRgn()));

   244         HIShapeUnion(qdShape, shape, shape);

   245 #endif

   246     }

   247     return shape;

   248 }

   249 

   250 #if !defined(Q_WS_MAC64) && !defined(QT_MAC_USE_COCOA)

   251 typedef OSStatus (*PtrHIShapeGetAsQDRgn)(HIShapeRef, RgnHandle);

   252 static PtrHIShapeGetAsQDRgn ptrHIShapeGetAsQDRgn = 0;

   253 #endif

   254 

   255 

   256 QRegion QRegion::fromHIShapeRef(HIShapeRef shape)

   257 {

   258     QRegion returnRegion;

   259     returnRegion.detach();

   260     // Begin gratuitous #if-defery

   261 #if (MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_5)

   262 # ifndef Q_WS_MAC64

   263     if (QSysInfo::MacintoshVersion >= QSysInfo::MV_10_5) {

   264 # endif

   265         HIShapeEnumerate(shape, kHIShapeParseFromTopLeft, shape2QRegionHelper, &returnRegion);

   266 # ifndef Q_WS_MAC64

   267     } else

   268 # endif

   269 #endif

   270     {

   271 #if !defined(Q_WS_MAC64) && !defined(QT_MAC_USE_COCOA)

   272         if (ptrHIShapeGetAsQDRgn == 0) {

   273             QLibrary library(QLatin1String("/System/Library/Frameworks/Carbon.framework/Carbon"));

   274             library.setLoadHints(QLibrary::ExportExternalSymbolsHint);

   275                     ptrHIShapeGetAsQDRgn = reinterpret_cast<PtrHIShapeGetAsQDRgn>(library.resolve("HIShapeGetAsQDRgn"));

   276         }

   277         RgnHandle rgn = qt_mac_get_rgn();

   278         ptrHIShapeGetAsQDRgn(shape, rgn);

   279         returnRegion = QRegion::fromQDRgn(rgn);

   280         qt_mac_dispose_rgn(rgn);

   281 #endif

   282     }

   283     return returnRegion;

   284 }

   285 

   286 QT_END_NAMESPACE