summaryrefslogtreecommitdiff
path: root/src/gui/image/qpixmap.cpp
blob: 20cc2b35975c8d991d91a0e9e2e68996c1c9a1d9 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707
1708
1709
1710
1711
1712
1713
1714
1715
1716
1717
1718
1719
1720
1721
1722
1723
1724
1725
1726
1727
1728
1729
1730
1731
1732
1733
1734
1735
1736
1737
1738
1739
1740
1741
1742
1743
1744
1745
1746
1747
1748
1749
1750
1751
1752
1753
1754
1755
1756
1757
1758
1759
1760
1761
1762
1763
1764
1765
1766
1767
1768
1769
1770
1771
1772
1773
1774
1775
1776
1777
1778
1779
1780
1781
1782
1783
1784
1785
1786
1787
1788
1789
1790
1791
1792
1793
1794
1795
1796
1797
1798
1799
1800
1801
1802
1803
1804
1805
1806
1807
1808
1809
1810
1811
1812
1813
1814
1815
1816
1817
1818
1819
1820
1821
1822
1823
1824
1825
1826
1827
1828
1829
1830
1831
1832
1833
1834
1835
1836
1837
1838
1839
1840
1841
1842
1843
1844
1845
1846
1847
1848
1849
1850
1851
1852
1853
1854
1855
1856
1857
1858
1859
1860
1861
1862
1863
1864
1865
1866
1867
1868
1869
1870
1871
1872
1873
1874
1875
1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027
2028
2029
2030
2031
2032
2033
2034
2035
2036
2037
2038
2039
2040
2041
2042
2043
2044
2045
2046
2047
2048
2049
2050
2051
2052
2053
2054
2055
2056
2057
2058
2059
2060
2061
2062
2063
2064
2065
2066
2067
2068
2069
2070
2071
2072
2073
2074
2075
2076
2077
2078
2079
2080
2081
2082
2083
2084
2085
2086
2087
2088
2089
2090
2091
2092
2093
2094
2095
2096
2097
2098
2099
2100
2101
2102
2103
2104
2105
2106
2107
2108
2109
2110
2111
2112
2113
2114
2115
2116
2117
2118
2119
2120
2121
2122
2123
2124
2125
2126
2127
2128
2129
2130
2131
2132
2133
2134
2135
2136
2137
2138
2139
2140
2141
2142
2143
2144
2145
2146
2147
2148
2149
2150
2151
2152
2153
2154
2155
2156
2157
2158
2159
2160
2161
2162
2163
2164
2165
2166
2167
2168
2169
2170
2171
2172
2173
2174
2175
2176
2177
2178
2179
2180
2181
2182
2183
2184
2185
2186
2187
2188
2189
2190
2191
2192
2193
2194
2195
2196
2197
2198
2199
2200
2201
2202
2203
2204
2205
2206
2207
2208
2209
2210
2211
2212
2213
2214
2215
2216
2217
2218
2219
2220
2221
2222
2223
2224
2225
2226
2227
2228
2229
2230
2231
2232
2233
2234
2235
2236
2237
2238
2239
2240
2241
2242
2243
2244
2245
2246
2247
2248
2249
2250
2251
2252
2253
2254
2255
2256
2257
2258
2259
2260
2261
2262
2263
2264
2265
2266
2267
2268
2269
2270
2271
2272
2273
2274
2275
2276
2277
2278
2279
2280
2281
2282
2283
2284
2285
2286
2287
2288
2289
2290
2291
2292
2293
2294
2295
/****************************************************************************
**
** Copyright (C) 2015 The Qt Company Ltd.
** Contact: http://www.qt.io/licensing/
**
** This file is part of the QtGui module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see http://www.qt.io/terms-conditions. For further
** information use the contact form at http://www.qt.io/contact-us.
**
** 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 or version 3 as published by the Free
** Software Foundation and appearing in the file LICENSE.LGPLv21 and
** LICENSE.LGPLv3 included in the packaging of this file. Please review the
** following information to ensure the GNU Lesser General Public License
** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** As a special exception, The Qt Company gives you certain additional
** rights. These rights are described in The Qt Company 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.
**
** $QT_END_LICENSE$
**
****************************************************************************/

#include <qglobal.h>

#include "qpixmap.h"
#include "qpixmapdata_p.h"
#include "qimagepixmapcleanuphooks_p.h"

#include "qbitmap.h"
#include "qcolormap.h"
#include "qimage.h"
#include "qwidget.h"
#include "qpainter.h"
#include "qdatastream.h"
#include "qbuffer.h"
#include "qapplication.h"
#include <private/qapplication_p.h>
#include <private/qgraphicssystem_p.h>
#include <private/qwidget_p.h>
#include "qevent.h"
#include "qfile.h"
#include "qfileinfo.h"
#include "qpixmapcache.h"
#include "qdatetime.h"
#include "qimagereader.h"
#include "qimagewriter.h"
#include "qpaintengine.h"
#include "qthread.h"

#ifdef Q_WS_MAC
# include "private/qt_mac_p.h"
# include "private/qpixmap_mac_p.h"
#endif

#ifdef Q_WS_QPA
# include "qplatformintegration_qpa.h"
#endif

#if defined(Q_WS_X11)
# include "qx11info_x11.h"
# include <private/qt_x11_p.h>
# include <private/qpixmap_x11_p.h>
#endif

#if defined(Q_OS_SYMBIAN)
# include <private/qt_s60_p.h>
#endif

#include "qpixmap_raster_p.h"
#include "private/qstylehelper_p.h"

QT_BEGIN_NAMESPACE

// ### Qt 5: remove
Q_GUI_EXPORT qint64 qt_pixmap_id(const QPixmap &pixmap)
{
    return pixmap.cacheKey();
}

static bool qt_pixmap_thread_test()
{
    if (!qApp) {
        qFatal("QPixmap: Must construct a QApplication before a QPaintDevice");
        return false;
    }

    if (qApp->thread() != QThread::currentThread()) {
        bool fail = false;
#if defined (Q_WS_X11)
        if (!QApplication::testAttribute(Qt::AA_X11InitThreads))
            fail = true;
#elif defined (Q_WS_QPA)
        if (!QApplicationPrivate::platformIntegration()->hasCapability(QPlatformIntegration::ThreadedPixmaps)) {
            printf("Lighthouse plugin does not support threaded pixmaps!\n");
            fail = true;
        }
#else
        if (QApplicationPrivate::graphics_system_name != QLatin1String("raster"))
            fail = true;
#endif
        if (fail) {
            qWarning("QPixmap: It is not safe to use pixmaps outside the GUI thread");
            return false;
        }
    }
    return true;
}

void QPixmap::init(int w, int h, Type type)
{
    init(w, h, int(type));
}

extern QApplication::Type qt_appType;

void QPixmap::init(int w, int h, int type)
{
    if (qt_appType == QApplication::Tty) {
        qWarning("QPixmap: Cannot create a QPixmap when no GUI is being used");
        data = 0;
        return;
    }

    if ((w > 0 && h > 0) || type == QPixmapData::BitmapType)
        data = QPixmapData::create(w, h, (QPixmapData::PixelType) type);
    else
        data = 0;
}

/*!
    \enum QPixmap::ColorMode

    \compat

    This enum type defines the color modes that exist for converting
    QImage objects to QPixmap.  It is provided here for compatibility
    with earlier versions of Qt.

    Use Qt::ImageConversionFlags instead.

    \value Auto  Select \c Color or \c Mono on a case-by-case basis.
    \value Color Always create colored pixmaps.
    \value Mono  Always create bitmaps.
*/

/*!
    Constructs a null pixmap.

    \sa isNull()
*/

QPixmap::QPixmap()
    : QPaintDevice()
{
    (void) qt_pixmap_thread_test();
    init(0, 0, QPixmapData::PixmapType);
}

/*!
    \fn QPixmap::QPixmap(int width, int height)

    Constructs a pixmap with the given \a width and \a height. If
    either \a width or \a height is zero, a null pixmap is
    constructed.

    \warning This will create a QPixmap with uninitialized data. Call
    fill() to fill the pixmap with an appropriate color before drawing
    onto it with QPainter.

    \sa isNull()
*/

QPixmap::QPixmap(int w, int h)
    : QPaintDevice()
{
    if (!qt_pixmap_thread_test())
        init(0, 0, QPixmapData::PixmapType);
    else
        init(w, h, QPixmapData::PixmapType);
}

/*!
    \overload

    Constructs a pixmap of the given \a size.

    \warning This will create a QPixmap with uninitialized data. Call
    fill() to fill the pixmap with an appropriate color before drawing
    onto it with QPainter.
*/

QPixmap::QPixmap(const QSize &size)
    : QPaintDevice()
{
    if (!qt_pixmap_thread_test())
        init(0, 0, QPixmapData::PixmapType);
    else
        init(size.width(), size.height(), QPixmapData::PixmapType);
}

/*!
  \internal
*/
QPixmap::QPixmap(const QSize &s, Type type)
{
    if (!qt_pixmap_thread_test())
        init(0, 0, type);
    else
        init(s.width(), s.height(), type);
}

/*!
  \internal
*/
QPixmap::QPixmap(const QSize &s, int type)
{
    if (!qt_pixmap_thread_test())
        init(0, 0, static_cast<QPixmapData::PixelType>(type));
    else
        init(s.width(), s.height(), static_cast<QPixmapData::PixelType>(type));
}

/*!
    \internal
*/
QPixmap::QPixmap(QPixmapData *d)
    : QPaintDevice(), data(d)
{
}

/*!
    Constructs a pixmap from the file with the given \a fileName. If the
    file does not exist or is of an unknown format, the pixmap becomes a
    null pixmap.

    The loader attempts to read the pixmap using the specified \a
    format. If the \a format is not specified (which is the default),
    the loader probes the file for a header to guess the file format.

    The file name can either refer to an actual file on disk or to
    one of the application's embedded resources. See the
    \l{resources.html}{Resource System} overview for details on how
    to embed images and other resource files in the application's
    executable.

    If the image needs to be modified to fit in a lower-resolution
    result (e.g. converting from 32-bit to 8-bit), use the \a
    flags to control the conversion.

    The \a fileName, \a format and \a flags parameters are
    passed on to load(). This means that the data in \a fileName is
    not compiled into the binary. If \a fileName contains a relative
    path (e.g. the filename only) the relevant file must be found
    relative to the runtime working directory.

    \sa {QPixmap#Reading and Writing Image Files}{Reading and Writing
    Image Files}
*/

QPixmap::QPixmap(const QString& fileName, const char *format, Qt::ImageConversionFlags flags)
    : QPaintDevice()
{
    init(0, 0, QPixmapData::PixmapType);
    if (!qt_pixmap_thread_test())
        return;

    load(fileName, format, flags);
}

/*!
    Constructs a pixmap that is a copy of the given \a pixmap.

    \sa copy()
*/

QPixmap::QPixmap(const QPixmap &pixmap)
    : QPaintDevice()
{
    if (!qt_pixmap_thread_test()) {
        init(0, 0, QPixmapData::PixmapType);
        return;
    }
    if (pixmap.paintingActive()) {                // make a deep copy
        operator=(pixmap.copy());
    } else {
        data = pixmap.data;
    }
}

/*!
    Constructs a pixmap from the given \a xpm data, which must be a
    valid XPM image.

    Errors are silently ignored.

    Note that it's possible to squeeze the XPM variable a little bit
    by using an unusual declaration:

    \snippet doc/src/snippets/code/src_gui_image_qpixmap.cpp 0

    The extra \c const makes the entire definition read-only, which is
    slightly more efficient (for example, when the code is in a shared
    library) and ROMable when the application is to be stored in ROM.
*/
#ifndef QT_NO_IMAGEFORMAT_XPM
QPixmap::QPixmap(const char * const xpm[])
    : QPaintDevice()
{
    init(0, 0, QPixmapData::PixmapType);
    if (!xpm)
        return;

    QImage image(xpm);
    if (!image.isNull()) {
        if (data && data->pixelType() == QPixmapData::BitmapType)
            *this = QBitmap::fromImage(image);
        else
            *this = fromImage(image);
    }
}
#endif


/*!
    Destroys the pixmap.
*/

QPixmap::~QPixmap()
{
    Q_ASSERT(!data || data->ref >= 1); // Catch if ref-counting changes again
}

/*!
  \internal
*/
int QPixmap::devType() const
{
    return QInternal::Pixmap;
}

/*!
    \fn QPixmap QPixmap::copy(int x, int y, int width, int height) const
    \overload

    Returns a deep copy of the subset of the pixmap that is specified
    by the rectangle QRect( \a x, \a y, \a width, \a height).
*/

/*!
    \fn QPixmap QPixmap::copy(const QRect &rectangle) const

    Returns a deep copy of the subset of the pixmap that is specified
    by the given \a rectangle. For more information on deep copies,
    see the \l {Implicit Data Sharing} documentation.

    If the given \a rectangle is empty, the whole image is copied.

    \sa operator=(), QPixmap(), {QPixmap#Pixmap
    Transformations}{Pixmap Transformations}
*/
QPixmap QPixmap::copy(const QRect &rect) const
{
    if (isNull())
        return QPixmap();

    QRect r(0, 0, width(), height());
    if (!rect.isEmpty())
        r = r.intersected(rect);

    QPixmapData *d = data->createCompatiblePixmapData();
    d->copy(data.data(), r);
    return QPixmap(d);
}

/*!
    \fn QPixmap::scroll(int dx, int dy, int x, int y, int width, int height, QRegion *exposed)
    \since 4.6

    This convenience function is equivalent to calling QPixmap::scroll(\a dx,
    \a dy, QRect(\a x, \a y, \a width, \a height), \a exposed).

    \sa QWidget::scroll(), QGraphicsItem::scroll()
*/

/*!
    \since 4.6

    Scrolls the area \a rect of this pixmap by (\a dx, \a dy). The exposed
    region is left unchanged. You can optionally pass a pointer to an empty
    QRegion to get the region that is \a exposed by the scroll operation.

    \snippet doc/src/snippets/code/src_gui_image_qpixmap.cpp 2

    You cannot scroll while there is an active painter on the pixmap.

    \sa QWidget::scroll(), QGraphicsItem::scroll()
*/
void QPixmap::scroll(int dx, int dy, const QRect &rect, QRegion *exposed)
{
    if (isNull() || (dx == 0 && dy == 0))
        return;
    QRect dest = rect & this->rect();
    QRect src = dest.translated(-dx, -dy) & dest;
    if (src.isEmpty()) {
        if (exposed)
            *exposed += dest;
        return;
    }

    detach();

    if (!data->scroll(dx, dy, src)) {
        // Fallback
        QPixmap pix = *this;
        QPainter painter(&pix);
        painter.setCompositionMode(QPainter::CompositionMode_Source);
        painter.drawPixmap(src.translated(dx, dy), *this, src);
        painter.end();
        *this = pix;
    }

    if (exposed) {
        *exposed += dest;
        *exposed -= src.translated(dx, dy);
    }
}

/*!
    Assigns the given \a pixmap to this pixmap and returns a reference
    to this pixmap.

    \sa copy(), QPixmap()
*/

QPixmap &QPixmap::operator=(const QPixmap &pixmap)
{
    if (paintingActive()) {
        qWarning("QPixmap::operator=: Cannot assign to pixmap during painting");
        return *this;
    }
    if (pixmap.paintingActive()) {                // make a deep copy
        *this = pixmap.copy();
    } else {
        data = pixmap.data;
    }
    return *this;
}

/*!
    \fn void QPixmap::swap(QPixmap &other)
    \since 4.8

    Swaps pixmap \a other with this pixmap. This operation is very
    fast and never fails.
*/

/*!
   Returns the pixmap as a QVariant.
*/
QPixmap::operator QVariant() const
{
    return QVariant(QVariant::Pixmap, this);
}

/*!
    \fn bool QPixmap::operator!() const

    Returns true if this is a null pixmap; otherwise returns false.

    \sa isNull()
*/

/*!
    \fn QPixmap::operator QImage() const

    Returns the pixmap as a QImage.

    Use the toImage() function instead.
*/

/*!
    Converts the pixmap to a QImage. Returns a null image if the
    conversion fails.

    If the pixmap has 1-bit depth, the returned image will also be 1
    bit deep. Images with more bits will be returned in a format
    closely represents the underlying system. Usually this will be
    QImage::Format_ARGB32_Premultiplied for pixmaps with an alpha and
    QImage::Format_RGB32 or QImage::Format_RGB16 for pixmaps without
    alpha.

    Note that for the moment, alpha masks on monochrome images are
    ignored.

    \sa fromImage(), {QImage#Image Formats}{Image Formats}
*/
QImage QPixmap::toImage() const
{
    if (isNull())
        return QImage();

    return data->toImage();
}

/*!
    \fn QMatrix QPixmap::trueMatrix(const QTransform &matrix, int width, int height)

    Returns the actual matrix used for transforming a pixmap with the
    given \a width, \a height and \a matrix.

    When transforming a pixmap using the transformed() function, the
    transformation matrix is internally adjusted to compensate for
    unwanted translation, i.e. transformed() returns the smallest
    pixmap containing all transformed points of the original
    pixmap. This function returns the modified matrix, which maps
    points correctly from the original pixmap into the new pixmap.

    \sa transformed(), {QPixmap#Pixmap Transformations}{Pixmap
    Transformations}
*/
QTransform QPixmap::trueMatrix(const QTransform &m, int w, int h)
{
    return QImage::trueMatrix(m, w, h);
}

/*!
  \overload

  This convenience function loads the matrix \a m into a
  QTransform and calls the overloaded function with the
  QTransform and the width \a w and the height \a h.
 */
QMatrix QPixmap::trueMatrix(const QMatrix &m, int w, int h)
{
    return trueMatrix(QTransform(m), w, h).toAffine();
}


/*!
    \fn bool QPixmap::isQBitmap() const

    Returns true if this is a QBitmap; otherwise returns false.
*/

bool QPixmap::isQBitmap() const
{
    return data->type == QPixmapData::BitmapType;
}

/*!
    \fn bool QPixmap::isNull() const

    Returns true if this is a null pixmap; otherwise returns false.

    A null pixmap has zero width, zero height and no contents. You
    cannot draw in a null pixmap.
*/
bool QPixmap::isNull() const
{
    return !data || data->isNull();
}

/*!
    \fn int QPixmap::width() const

    Returns the width of the pixmap.

    \sa size(), {QPixmap#Pixmap Information}{Pixmap Information}
*/
int QPixmap::width() const
{
    return data ? data->width() : 0;
}

/*!
    \fn int QPixmap::height() const

    Returns the height of the pixmap.

    \sa size(), {QPixmap#Pixmap Information}{Pixmap Information}
*/
int QPixmap::height() const
{
    return data ? data->height() : 0;
}

/*!
    \fn QSize QPixmap::size() const

    Returns the size of the pixmap.

    \sa width(), height(), {QPixmap#Pixmap Information}{Pixmap
    Information}
*/
QSize QPixmap::size() const
{
    return data ? QSize(data->width(), data->height()) : QSize(0, 0);
}

/*!
    \fn QRect QPixmap::rect() const

    Returns the pixmap's enclosing rectangle.

    \sa {QPixmap#Pixmap Information}{Pixmap Information}
*/
QRect QPixmap::rect() const
{
    return data ? QRect(0, 0, data->width(), data->height()) : QRect();
}

/*!
    \fn int QPixmap::depth() const

    Returns the depth of the pixmap.

    The pixmap depth is also called bits per pixel (bpp) or bit planes
    of a pixmap. A null pixmap has depth 0.

    \sa defaultDepth(), {QPixmap#Pixmap Information}{Pixmap
    Information}
*/
int QPixmap::depth() const
{
    return data ? data->depth() : 0;
}

/*!
    \fn void QPixmap::resize(const QSize &size)
    \overload
    \compat

    Use QPixmap::copy() instead to get the pixmap with the new size.

    \oldcode
        pixmap.resize(size);
    \newcode
        pixmap = pixmap.copy(QRect(QPoint(0, 0), size));
    \endcode
*/
#ifdef QT3_SUPPORT
void QPixmap::resize_helper(const QSize &s)
{
    int w = s.width();
    int h = s.height();
    if (w < 1 || h < 1) {
        *this = QPixmap();
        return;
    }

    if (size() == s)
        return;

    // QPixmap.data member may be QRuntimePixmapData so use pixmapData() function to get
    // the actual underlaying runtime pixmap data.
    QPixmapData *pd = pixmapData();

    // Create new pixmap
    QPixmap pm(QSize(w, h), pd ? pd->type : QPixmapData::PixmapType);
    bool uninit = false;
#if defined(Q_WS_X11)
    QX11PixmapData *x11Data = pd && pd->classId() == QPixmapData::X11Class ? static_cast<QX11PixmapData*>(pd) : 0;
    if (x11Data) {
        pm.x11SetScreen(x11Data->xinfo.screen());
        uninit = x11Data->flags & QX11PixmapData::Uninitialized;
    }
#elif defined(Q_WS_MAC)
    QMacPixmapData *macData = pd && pd->classId() == QPixmapData::MacClass ? static_cast<QMacPixmapData*>(pd) : 0;
    if (macData)
        uninit = macData->uninit;
#endif
    if (!uninit && !isNull()) {
        // Copy old pixmap
        if (hasAlphaChannel())
            pm.fill(Qt::transparent);
        QPainter p(&pm);
        p.drawPixmap(0, 0, *this, 0, 0, qMin(width(), w), qMin(height(), h));
    }

#if defined(Q_WS_X11)
    if (x11Data && x11Data->x11_mask) {
        QPixmapData *newPd = pm.pixmapData();
        QX11PixmapData *pmData = (newPd && newPd->classId() == QPixmapData::X11Class)
                                 ? static_cast<QX11PixmapData*>(newPd) : 0;
        if (pmData) {
            pmData->x11_mask = (Qt::HANDLE)XCreatePixmap(X11->display,
                                                         RootWindow(x11Data->xinfo.display(),
                                                                    x11Data->xinfo.screen()),
                                                         w, h, 1);
            GC gc = XCreateGC(X11->display, pmData->x11_mask, 0, 0);
            XCopyArea(X11->display, x11Data->x11_mask, pmData->x11_mask, gc, 0, 0,
                      qMin(width(), w), qMin(height(), h), 0, 0);
            XFreeGC(X11->display, gc);
        }
    }
#endif
    *this = pm;
}
#endif

/*!
    \fn void QPixmap::resize(int width, int height)
    \compat

    Use QPixmap::copy() instead to get the pixmap with the new size.

    \oldcode
        pixmap.resize(10, 20);
    \newcode
        pixmap = pixmap.copy(0, 0, 10, 20);
    \endcode
*/

/*!
    \fn bool QPixmap::selfMask() const
    \compat

    Returns whether the pixmap is its own mask or not.

    This function is no longer relevant since the concept of self
    masking doesn't exists anymore.
*/

/*!
    Sets a mask bitmap.

    This function merges the \a mask with the pixmap's alpha channel. A pixel
    value of 1 on the mask means the pixmap's pixel is unchanged; a value of 0
    means the pixel is transparent. The mask must have the same size as this
    pixmap.

    Setting a null mask resets the mask, leaving the previously transparent
    pixels black. The effect of this function is undefined when the pixmap is
    being painted on.

    \warning This is potentially an expensive operation.

    \sa mask(), {QPixmap#Pixmap Transformations}{Pixmap Transformations},
    QBitmap
*/
void QPixmap::setMask(const QBitmap &mask)
{
    if (paintingActive()) {
        qWarning("QPixmap::setMask: Cannot set mask while pixmap is being painted on");
        return;
    }

    if (!mask.isNull() && mask.size() != size()) {
        qWarning("QPixmap::setMask() mask size differs from pixmap size");
        return;
    }

    if (isNull())
        return;

    if (static_cast<const QPixmap &>(mask).data == data) // trying to selfmask
       return;

    detach();
    data->setMask(mask);
}

#ifndef QT_NO_IMAGE_HEURISTIC_MASK
/*!
    Creates and returns a heuristic mask for this pixmap.

    The function works by selecting a color from one of the corners
    and then chipping away pixels of that color, starting at all the
    edges.  If \a clipTight is true (the default) the mask is just
    large enough to cover the pixels; otherwise, the mask is larger
    than the data pixels.

    The mask may not be perfect but it should be reasonable, so you
    can do things such as the following:

    \snippet doc/src/snippets/code/src_gui_image_qpixmap.cpp 1

    This function is slow because it involves converting to/from a
    QImage, and non-trivial computations.

    \sa QImage::createHeuristicMask(), createMaskFromColor()
*/
QBitmap QPixmap::createHeuristicMask(bool clipTight) const
{
    QBitmap m = QBitmap::fromImage(toImage().createHeuristicMask(clipTight));
    return m;
}
#endif

/*!
    Creates and returns a mask for this pixmap based on the given \a
    maskColor. If the \a mode is Qt::MaskInColor, all pixels matching the
    maskColor will be transparent. If \a mode is Qt::MaskOutColor, all pixels
    matching the maskColor will be opaque.

    This function is slow because it involves converting to/from a
    QImage.

    \sa createHeuristicMask(), QImage::createMaskFromColor()
*/
QBitmap QPixmap::createMaskFromColor(const QColor &maskColor, Qt::MaskMode mode) const
{
    QImage image = toImage().convertToFormat(QImage::Format_ARGB32);
    return QBitmap::fromImage(image.createMaskFromColor(maskColor.rgba(), mode));
}

/*! \overload

    Creates and returns a mask for this pixmap based on the given \a
    maskColor. Same as calling createMaskFromColor(maskColor,
    Qt::MaskInColor)

    \sa createHeuristicMask(), QImage::createMaskFromColor()
*/
QBitmap QPixmap::createMaskFromColor(const QColor &maskColor) const
{
    return createMaskFromColor(maskColor, Qt::MaskInColor);
}

/*!
    Loads a pixmap from the file with the given \a fileName. Returns
    true if the pixmap was successfully loaded; otherwise returns
    false.

    The loader attempts to read the pixmap using the specified \a
    format. If the \a format is not specified (which is the default),
    the loader probes the file for a header to guess the file format.

    The file name can either refer to an actual file on disk or to one
    of the application's embedded resources. See the
    \l{resources.html}{Resource System} overview for details on how to
    embed pixmaps and other resource files in the application's
    executable.

    If the data needs to be modified to fit in a lower-resolution
    result (e.g. converting from 32-bit to 8-bit), use the \a flags to
    control the conversion.

    Note that QPixmaps are automatically added to the QPixmapCache
    when loaded from a file; the key used is internal and can not
    be acquired.

    \sa loadFromData(), {QPixmap#Reading and Writing Image
    Files}{Reading and Writing Image Files}
*/

bool QPixmap::load(const QString &fileName, const char *format, Qt::ImageConversionFlags flags)
{
    if (fileName.isEmpty())
        return false;

    QFileInfo info(fileName);
    QString key = QLatin1Literal("qt_pixmap")
                  % info.absoluteFilePath()
                  % HexString<uint>(info.lastModified().toTime_t())
                  % HexString<quint64>(info.size())
                  % HexString<uint>(data ? data->pixelType() : QPixmapData::PixmapType);

    // Note: If no extension is provided, we try to match the
    // file against known plugin extensions
    if (!info.completeSuffix().isEmpty() && !info.exists())
        return false;

    if (QPixmapCache::find(key, *this))
        return true;

    QScopedPointer<QPixmapData> tmp(QPixmapData::create(0, 0, data ? data->type : QPixmapData::PixmapType));
    if (tmp->fromFile(fileName, format, flags)) {
        data = tmp.take();
        QPixmapCache::insert(key, *this);
        return true;
    }

    return false;
}

/*!
    \fn bool QPixmap::loadFromData(const uchar *data, uint len, const char *format, Qt::ImageConversionFlags flags)

    Loads a pixmap from the \a len first bytes of the given binary \a
    data.  Returns true if the pixmap was loaded successfully;
    otherwise returns false.

    The loader attempts to read the pixmap using the specified \a
    format. If the \a format is not specified (which is the default),
    the loader probes the file for a header to guess the file format.

    If the data needs to be modified to fit in a lower-resolution
    result (e.g. converting from 32-bit to 8-bit), use the \a flags to
    control the conversion.

    \sa load(), {QPixmap#Reading and Writing Image Files}{Reading and
    Writing Image Files}
*/

bool QPixmap::loadFromData(const uchar *buf, uint len, const char *format, Qt::ImageConversionFlags flags)
{
    if (len == 0 || buf == 0)
        return false;

    if (!data)
        data = QPixmapData::create(0, 0, QPixmapData::PixmapType);

    return data->fromData(buf, len, format, flags);
}

/*!
    \fn bool QPixmap::loadFromData(const QByteArray &data, const char *format, Qt::ImageConversionFlags flags)

    \overload

    Loads a pixmap from the binary \a data using the specified \a
    format and conversion \a flags.
*/


/*!
    Saves the pixmap to the file with the given \a fileName using the
    specified image file \a format and \a quality factor. Returns true
    if successful; otherwise returns false.

    The \a quality factor must be in the range [0,100] or -1. Specify
    0 to obtain small compressed files, 100 for large uncompressed
    files, and -1 to use the default settings.

    If \a format is 0, an image format will be chosen from \a fileName's
    suffix.

    \sa {QPixmap#Reading and Writing Image Files}{Reading and Writing
    Image Files}
*/

bool QPixmap::save(const QString &fileName, const char *format, int quality) const
{
    if (isNull())
        return false;                                // nothing to save
    QImageWriter writer(fileName, format);
    return doImageIO(&writer, quality);
}

/*!
    \overload

    This function writes a QPixmap to the given \a device using the
    specified image file \a format and \a quality factor. This can be
    used, for example, to save a pixmap directly into a QByteArray:

    \snippet doc/src/snippets/image/image.cpp 1
*/

bool QPixmap::save(QIODevice* device, const char* format, int quality) const
{
    if (isNull())
        return false;                                // nothing to save
    QImageWriter writer(device, format);
    return doImageIO(&writer, quality);
}

/*! \internal
*/
bool QPixmap::doImageIO(QImageWriter *writer, int quality) const
{
    if (quality > 100  || quality < -1)
        qWarning("QPixmap::save: quality out of range [-1,100]");
    if (quality >= 0)
        writer->setQuality(qMin(quality,100));
    return writer->write(toImage());
}


// The implementation (and documentation) of
// QPixmap::fill(const QWidget *, const QPoint &)
// is in qwidget.cpp

/*!
    \fn void QPixmap::fill(const QWidget *widget, int x, int y)
    \overload

    Fills the pixmap with the \a widget's background color or pixmap.
    The given point, (\a x, \a y), defines an offset in widget
    coordinates to which the pixmap's top-left pixel will be mapped
    to.
*/

/*!
    Fills the pixmap with the given \a color.

    The effect of this function is undefined when the pixmap is
    being painted on.

    \sa {QPixmap#Pixmap Transformations}{Pixmap Transformations}
*/

void QPixmap::fill(const QColor &color)
{
    if (isNull())
        return;

    // Some people are probably already calling fill while a painter is active, so to not break
    // their programs, only print a warning and return when the fill operation could cause a crash.
    if (paintingActive() && (color.alpha() != 255) && !hasAlphaChannel()) {
        qWarning("QPixmap::fill: Cannot fill while pixmap is being painted on");
        return;
    }

    if (data->ref == 1) {
        // detach() will also remove this pixmap from caches, so
        // it has to be called even when ref == 1.
        detach();
    } else {
        // Don't bother to make a copy of the data object, since
        // it will be filled with new pixel data anyway.
        QPixmapData *d = data->createCompatiblePixmapData();
        d->resize(data->width(), data->height());
        data = d;
    }
    data->fill(color);
}

/*! \obsolete
    Returns a number that identifies the contents of this QPixmap
    object. Distinct QPixmap objects can only have the same serial
    number if they refer to the same contents (but they don't have
    to).

    Use cacheKey() instead.

    \warning The serial number doesn't necessarily change when
    the pixmap is altered. This means that it may be dangerous to use
    it as a cache key. For caching pixmaps, we recommend using the
    QPixmapCache class whenever possible.
*/
int QPixmap::serialNumber() const
{
    if (isNull())
        return 0;
    return data->serialNumber();
}

/*!
    Returns a number that identifies this QPixmap. Distinct QPixmap
    objects can only have the same cache key if they refer to the same
    contents.

    The cacheKey() will change when the pixmap is altered.
*/
qint64 QPixmap::cacheKey() const
{
    if (isNull())
        return 0;

    Q_ASSERT(data);
    return data->cacheKey();
}

static void sendResizeEvents(QWidget *target)
{
    QResizeEvent e(target->size(), QSize());
    QApplication::sendEvent(target, &e);

    const QObjectList children = target->children();
    for (int i = 0; i < children.size(); ++i) {
        QWidget *child = static_cast<QWidget*>(children.at(i));
        if (child->isWidgetType() && !child->isWindow() && child->testAttribute(Qt::WA_PendingResizeEvent))
            sendResizeEvents(child);
    }
}

/*!
    \fn QPixmap QPixmap::grabWidget(QWidget * widget, const QRect &rectangle)

    Creates a pixmap and paints the given \a widget, restricted by the
    given \a rectangle, in it. If the \a widget has any children, then
    they are also painted in the appropriate positions.

    If no rectangle is specified (the default) the entire widget is
    painted.

    If \a widget is 0, the specified rectangle doesn't overlap the
    widget's rectangle, or an error occurs, the function will return a
    null QPixmap.  If the rectangle is a superset of the given \a
    widget, the areas outside the \a widget are covered with the
    widget's background.

    This function actually asks \a widget to paint itself (and its
    children to paint themselves) by calling paintEvent() with painter
    redirection turned on. But QPixmap also provides the grabWindow()
    function which is a bit faster by grabbing pixels directly off the
    screen. In addition, if there are overlaying windows,
    grabWindow(), unlike grabWidget(), will see them.

    \warning Do not grab a widget from its QWidget::paintEvent().
    However, it is safe to grab a widget from another widget's
    \l {QWidget::}{paintEvent()}.

    \sa grabWindow()
*/

QPixmap QPixmap::grabWidget(QWidget * widget, const QRect &rect)
{
    if (!widget)
        return QPixmap();

    if (widget->testAttribute(Qt::WA_PendingResizeEvent) || !widget->testAttribute(Qt::WA_WState_Created))
        sendResizeEvents(widget);

    widget->d_func()->prepareToRender(QRegion(),
        QWidget::DrawWindowBackground | QWidget::DrawChildren | QWidget::IgnoreMask);

    QRect r(rect);
    if (r.width() < 0)
        r.setWidth(widget->width() - rect.x());
    if (r.height() < 0)
        r.setHeight(widget->height() - rect.y());

    if (!r.intersects(widget->rect()))
        return QPixmap();

    QPixmap res(r.size());
    if (!qt_widget_private(widget)->isOpaque)
        res.fill(Qt::transparent);

    widget->d_func()->render(&res, QPoint(), r, QWidget::DrawWindowBackground
                             | QWidget::DrawChildren | QWidget::IgnoreMask, true);
    return res;
}

/*!
    \fn QPixmap QPixmap::grabWidget(QWidget *widget, int x, int y, int
    width, int height)

    \overload

    Creates a pixmap and paints the given \a widget, restricted by
    QRect(\a x, \a y, \a width, \a height), in it.

    \warning Do not grab a widget from its QWidget::paintEvent().
    However, it is safe to grab a widget from another widget's
    \l {QWidget::}{paintEvent()}.
*/


/*!
    \since 4.5

    \enum QPixmap::ShareMode

    This enum type defines the share modes that are available when
    creating a QPixmap object from a raw X11 Pixmap handle.

    \value ImplicitlyShared  This mode will cause the QPixmap object to
    create a copy of the internal data before it is modified, thus
    keeping the original X11 pixmap intact.

    \value ExplicitlyShared  In this mode, the pixmap data will \e not be
    copied before it is modified, which in effect will change the
    original X11 pixmap.

    \warning This enum is only used for X11 specific functions; using
    it is non-portable.

    \sa QPixmap::fromX11Pixmap()
*/

/*!
    \since 4.5

    \fn QPixmap QPixmap::fromX11Pixmap(Qt::HANDLE pixmap, QPixmap::ShareMode mode)

    Creates a QPixmap from the native X11 Pixmap handle \a pixmap,
    using \a mode as the share mode. The default share mode is
    QPixmap::ImplicitlyShared, which means that a copy of the pixmap is
    made if someone tries to modify it by e.g. drawing onto it.

    QPixmap does \e not take ownership of the \a pixmap handle, and
    have to be deleted by the user.

    \warning This function is X11 specific; using it is non-portable.

    \sa QPixmap::ShareMode
*/


#if defined(Q_WS_X11) || defined(Q_WS_QWS)

/*!
    Returns the pixmap's handle to the device context.

    Note that, since QPixmap make use of \l {Implicit Data
    Sharing}{implicit data sharing}, the detach() function must be
    called explicitly to ensure that only \e this pixmap's data is
    modified if the pixmap data is shared.

    \warning This function is X11 specific; using it is non-portable.

    \warning Since 4.8, pixmaps do not have an X11 handle unless
    created with \l {QPixmap::}{fromX11Pixmap()}, or if the native
    graphics system is explicitly enabled.

    \sa detach()
    \sa QApplication::setGraphicsSystem()
*/

Qt::HANDLE QPixmap::handle() const
{
#if defined(Q_WS_X11)
    const QPixmapData *pd = pixmapData();
    if (pd && pd->classId() == QPixmapData::X11Class)
        return static_cast<const QX11PixmapData*>(pd)->handle();
#endif
    return 0;
}
#endif


#ifdef QT3_SUPPORT
static Qt::ImageConversionFlags colorModeToFlags(QPixmap::ColorMode mode)
{
    Qt::ImageConversionFlags flags = Qt::AutoColor;
    switch (mode) {
      case QPixmap::Color:
        flags |= Qt::ColorOnly;
        break;
      case QPixmap::Mono:
        flags |= Qt::MonoOnly;
        break;
      default:
        break;// Nothing.
    }
    return flags;
}

/*!
    Use the constructor that takes a Qt::ImageConversionFlag instead.
*/

QPixmap::QPixmap(const QString& fileName, const char *format, ColorMode mode)
    : QPaintDevice()
{
    init(0, 0, QPixmapData::PixmapType);
    if (!qt_pixmap_thread_test())
        return;

    load(fileName, format, colorModeToFlags(mode));
}

/*!
    Constructs a pixmap from the QImage \a image.

    Use the static fromImage() function instead.
*/
QPixmap::QPixmap(const QImage& image)
    : QPaintDevice()
{
    init(0, 0, QPixmapData::PixmapType);
    if (!qt_pixmap_thread_test())
        return;

    if (data && data->pixelType() == QPixmapData::BitmapType)
        *this = QBitmap::fromImage(image);
    else
        *this = fromImage(image);
}

/*!
    \overload

    Converts the given \a image to a pixmap that is assigned to this
    pixmap.

    Use the static fromImage() function instead.
*/

QPixmap &QPixmap::operator=(const QImage &image)
{
    if (data && data->pixelType() == QPixmapData::BitmapType)
        *this = QBitmap::fromImage(image);
    else
        *this = fromImage(image);
    return *this;
}

/*!
    Use the load() function that takes a Qt::ImageConversionFlag instead.
*/

bool QPixmap::load(const QString &fileName, const char *format, ColorMode mode)
{
    return load(fileName, format, colorModeToFlags(mode));
}

/*!
    Use the loadFromData() function that takes a Qt::ImageConversionFlag instead.
*/

bool QPixmap::loadFromData(const uchar *buf, uint len, const char *format, ColorMode mode)
{
    return loadFromData(buf, len, format, colorModeToFlags(mode));
}

/*!
    Use the static fromImage() function instead.
*/
bool QPixmap::convertFromImage(const QImage &image, ColorMode mode)
{
    if (data && data->pixelType() == QPixmapData::BitmapType)
        *this = QBitmap::fromImage(image, colorModeToFlags(mode));
    else
        *this = fromImage(image, colorModeToFlags(mode));
    return !isNull();
}

#endif

/*****************************************************************************
  QPixmap stream functions
 *****************************************************************************/
#if !defined(QT_NO_DATASTREAM)
/*!
    \relates QPixmap

    Writes the given \a pixmap to the given \a stream as a PNG
    image. Note that writing the stream to a file will not produce a
    valid image file.

    \sa QPixmap::save(), {Serializing Qt Data Types}
*/

QDataStream &operator<<(QDataStream &stream, const QPixmap &pixmap)
{
    return stream << pixmap.toImage();
}

/*!
    \relates QPixmap

    Reads an image from the given \a stream into the given \a pixmap.

    \sa QPixmap::load(), {Serializing Qt Data Types}
*/

QDataStream &operator>>(QDataStream &stream, QPixmap &pixmap)
{
    QImage image;
    stream >> image;

    if (image.isNull()) {
        pixmap = QPixmap();
    } else if (image.depth() == 1) {
        pixmap = QBitmap::fromImage(image);
    } else {
        pixmap = QPixmap::fromImage(image);
    }
    return stream;
}

#endif // QT_NO_DATASTREAM

#ifdef QT3_SUPPORT
Q_GUI_EXPORT void copyBlt(QPixmap *dst, int dx, int dy,
                          const QPixmap *src, int sx, int sy, int sw, int sh)
{
    Q_ASSERT_X(dst, "::copyBlt", "Destination pixmap must be non-null");
    Q_ASSERT_X(src, "::copyBlt", "Source pixmap must be non-null");

    if (src->hasAlphaChannel()) {
        if (dst->paintEngine()->hasFeature(QPaintEngine::PorterDuff)) {
            QPainter p(dst);
            p.setCompositionMode(QPainter::CompositionMode_Source);
            p.drawPixmap(dx, dy, *src, sx, sy, sw, sh);
        } else {
            QImage image = dst->toImage().convertToFormat(QImage::Format_ARGB32_Premultiplied);
            QPainter p(&image);
            p.setCompositionMode(QPainter::CompositionMode_Source);
            p.drawPixmap(dx, dy, *src, sx, sy, sw, sh);
            p.end();
            *dst = QPixmap::fromImage(image);
        }
    } else {
        QPainter p(dst);
        p.drawPixmap(dx, dy, *src, sx, sy, sw, sh);
    }

}
#endif

/*!
    \internal
*/

bool QPixmap::isDetached() const
{
    return data && data->ref == 1;
}

/*! \internal
  ### Qt5 - remove me.
*/
void QPixmap::deref()
{
    Q_ASSERT_X(false, "QPixmap::deref()", "Do not call this function anymore!");
}

/*!
    \fn QImage QPixmap::convertToImage() const

    Use the toImage() function instead.
*/

/*!
    Replaces this pixmap's data with the given \a image using the
    specified \a flags to control the conversion.  The \a flags
    argument is a bitwise-OR of the \l{Qt::ImageConversionFlags}.
    Passing 0 for \a flags sets all the default options. Returns true
    if the result is that this pixmap is not null.

    Note: this function was part of Qt 3 support in Qt 4.6 and earlier.
    It has been promoted to official API status in 4.7 to support updating
    the pixmap's image without creating a new QPixmap as fromImage() would.

    \sa fromImage()
    \since 4.7
*/
bool QPixmap::convertFromImage(const QImage &image, Qt::ImageConversionFlags flags)
{
    if (image.isNull() || !data)
        *this = QPixmap::fromImage(image, flags);
    else
        data->fromImage(image, flags);
    return !isNull();
}

/*!
    \fn QPixmap QPixmap::xForm(const QMatrix &matrix) const

    Use transformed() instead.
*/

/*!
    \fn QPixmap QPixmap::scaled(int width, int height,
    Qt::AspectRatioMode aspectRatioMode, Qt::TransformationMode
    transformMode) const

    \overload

    Returns a copy of the pixmap scaled to a rectangle with the given
    \a width and \a height according to the given \a aspectRatioMode and
    \a transformMode.

    If either the \a width or the \a height is zero or negative, this
    function returns a null pixmap.
*/

/*!
    \fn QPixmap QPixmap::scaled(const QSize &size, Qt::AspectRatioMode
    aspectRatioMode, Qt::TransformationMode transformMode) const

    Scales the pixmap to the given \a size, using the aspect ratio and
    transformation modes specified by \a aspectRatioMode and \a
    transformMode.

    \image qimage-scaling.png

    \list
    \i If \a aspectRatioMode is Qt::IgnoreAspectRatio, the pixmap
       is scaled to \a size.
    \i If \a aspectRatioMode is Qt::KeepAspectRatio, the pixmap is
       scaled to a rectangle as large as possible inside \a size, preserving the aspect ratio.
    \i If \a aspectRatioMode is Qt::KeepAspectRatioByExpanding,
       the pixmap is scaled to a rectangle as small as possible
       outside \a size, preserving the aspect ratio.
    \endlist

    If the given \a size is empty, this function returns a null
    pixmap.


    In some cases it can be more beneficial to draw the pixmap to a
    painter with a scale set rather than scaling the pixmap. This is
    the case when the painter is for instance based on OpenGL or when
    the scale factor changes rapidly.

    \sa isNull(), {QPixmap#Pixmap Transformations}{Pixmap
    Transformations}

*/
QPixmap QPixmap::scaled(const QSize& s, Qt::AspectRatioMode aspectMode, Qt::TransformationMode mode) const
{
    if (isNull()) {
        qWarning("QPixmap::scaled: Pixmap is a null pixmap");
        return QPixmap();
    }
    if (s.isEmpty())
        return QPixmap();

    QSize newSize = size();
    newSize.scale(s, aspectMode);
    newSize.rwidth() = qMax(newSize.width(), 1);
    newSize.rheight() = qMax(newSize.height(), 1);
    if (newSize == size())
        return *this;

    QTransform wm = QTransform::fromScale((qreal)newSize.width() / width(),
                                          (qreal)newSize.height() / height());
    QPixmap pix = transformed(wm, mode);
    return pix;
}

/*!
    \fn QPixmap QPixmap::scaledToWidth(int width, Qt::TransformationMode
    mode) const

    Returns a scaled copy of the image. The returned image is scaled
    to the given \a width using the specified transformation \a mode.
    The height of the pixmap is automatically calculated so that the
    aspect ratio of the pixmap is preserved.

    If \a width is 0 or negative, a null pixmap is returned.

    \sa isNull(), {QPixmap#Pixmap Transformations}{Pixmap
    Transformations}
*/
QPixmap QPixmap::scaledToWidth(int w, Qt::TransformationMode mode) const
{
    if (isNull()) {
        qWarning("QPixmap::scaleWidth: Pixmap is a null pixmap");
        return copy();
    }
    if (w <= 0)
        return QPixmap();

    qreal factor = (qreal) w / width();
    QTransform wm = QTransform::fromScale(factor, factor);
    return transformed(wm, mode);
}

/*!
    \fn QPixmap QPixmap::scaledToHeight(int height,
    Qt::TransformationMode mode) const

    Returns a scaled copy of the image. The returned image is scaled
    to the given \a height using the specified transformation \a mode.
    The width of the pixmap is automatically calculated so that the
    aspect ratio of the pixmap is preserved.

    If \a height is 0 or negative, a null pixmap is returned.

    \sa isNull(), {QPixmap#Pixmap Transformations}{Pixmap
    Transformations}
*/
QPixmap QPixmap::scaledToHeight(int h, Qt::TransformationMode mode) const
{
    if (isNull()) {
        qWarning("QPixmap::scaleHeight: Pixmap is a null pixmap");
        return copy();
    }
    if (h <= 0)
        return QPixmap();

    qreal factor = (qreal) h / height();
    QTransform wm = QTransform::fromScale(factor, factor);
    return transformed(wm, mode);
}

/*!
    Returns a copy of the pixmap that is transformed using the given
    transformation \a transform and transformation \a mode. The original
    pixmap is not changed.

    The transformation \a transform is internally adjusted to compensate
    for unwanted translation; i.e. the pixmap produced is the smallest
    pixmap that contains all the transformed points of the original
    pixmap. Use the trueMatrix() function to retrieve the actual
    matrix used for transforming the pixmap.

    This function is slow because it involves transformation to a
    QImage, non-trivial computations and a transformation back to a
    QPixmap.

    \sa trueMatrix(), {QPixmap#Pixmap Transformations}{Pixmap
    Transformations}
*/
QPixmap QPixmap::transformed(const QTransform &transform,
                             Qt::TransformationMode mode) const
{
    if (isNull() || transform.type() <= QTransform::TxTranslate)
        return *this;

    return data->transformed(transform, mode);
}

/*!
  \overload

  This convenience function loads the \a matrix into a
  QTransform and calls the overloaded function.
 */
QPixmap QPixmap::transformed(const QMatrix &matrix, Qt::TransformationMode mode) const
{
    return transformed(QTransform(matrix), mode);
}








/*!
    \class QPixmap

    \brief The QPixmap class is an off-screen image representation
    that can be used as a paint device.

    \ingroup painting
    \ingroup shared


    Qt provides four classes for handling image data: QImage, QPixmap,
    QBitmap and QPicture. QImage is designed and optimized for I/O,
    and for direct pixel access and manipulation, while QPixmap is
    designed and optimized for showing images on screen. QBitmap is
    only a convenience class that inherits QPixmap, ensuring a depth
    of 1. The isQBitmap() function returns true if a QPixmap object is
    really a bitmap, otherwise returns false. Finally, the QPicture class
    is a paint device that records and replays QPainter commands.

    A QPixmap can easily be displayed on the screen using QLabel or
    one of QAbstractButton's subclasses (such as QPushButton and
    QToolButton). QLabel has a pixmap property, whereas
    QAbstractButton has an icon property.

    In addition to the ordinary constructors, a QPixmap can be
    constructed using the static grabWidget() and grabWindow()
    functions which creates a QPixmap and paints the given widget, or
    window, into it.

    QPixmap objects can be passed around by value since the QPixmap
    class uses implicit data sharing. For more information, see the \l
    {Implicit Data Sharing} documentation. QPixmap objects can also be
    streamed.

    Note that the pixel data in a pixmap is internal and is managed by
    the underlying window system. Because QPixmap is a QPaintDevice
    subclass, QPainter can be used to draw directly onto pixmaps.
    Pixels can only be accessed through QPainter functions or by
    converting the QPixmap to a QImage. However, the fill() function
    is available for initializing the entire pixmap with a given color.

    There are functions to convert between QImage and
    QPixmap. Typically, the QImage class is used to load an image
    file, optionally manipulating the image data, before the QImage
    object is converted into a QPixmap to be shown on
    screen. Alternatively, if no manipulation is desired, the image
    file can be loaded directly into a QPixmap. On Windows, the
    QPixmap class also supports conversion between \c HBITMAP and
    QPixmap. On Symbian, the QPixmap class also supports conversion
    between CFbsBitmap and QPixmap.

    QPixmap provides a collection of functions that can be used to
    obtain a variety of information about the pixmap. In addition,
    there are several functions that enables transformation of the
    pixmap.

    \tableofcontents

    \section1 Reading and Writing Image Files

    QPixmap provides several ways of reading an image file: The file
    can be loaded when constructing the QPixmap object, or by using
    the load() or loadFromData() functions later on. When loading an
    image, the file name can either refer to an actual file on disk or
    to one of the application's embedded resources. See \l{The Qt
    Resource System} overview for details on how to embed images and
    other resource files in the application's executable.

    Simply call the save() function to save a QPixmap object.

    The complete list of supported file formats are available through
    the QImageReader::supportedImageFormats() and
    QImageWriter::supportedImageFormats() functions. New file formats
    can be added as plugins. By default, Qt supports the following
    formats:

    \table
    \header \o Format \o Description                      \o Qt's support
    \row    \o BMP    \o Windows Bitmap                   \o Read/write
    \row    \o GIF    \o Graphic Interchange Format (optional) \o Read
    \row    \o JPG    \o Joint Photographic Experts Group \o Read/write
    \row    \o JPEG   \o Joint Photographic Experts Group \o Read/write
    \row    \o PNG    \o Portable Network Graphics        \o Read/write
    \row    \o PBM    \o Portable Bitmap                  \o Read
    \row    \o PGM    \o Portable Graymap                 \o Read
    \row    \o PPM    \o Portable Pixmap                  \o Read/write
    \row    \o XBM    \o X11 Bitmap                       \o Read/write
    \row    \o XPM    \o X11 Pixmap                       \o Read/write
    \endtable

    \section1 Pixmap Information

    QPixmap provides a collection of functions that can be used to
    obtain a variety of information about the pixmap:

    \table
    \header
    \o \o Available Functions
    \row
    \o Geometry
    \o
    The size(), width() and height() functions provide information
    about the pixmap's size. The rect() function returns the image's
    enclosing rectangle.

    \row
    \o Alpha component
    \o

    The hasAlphaChannel() returns true if the pixmap has a format that
    respects the alpha channel, otherwise returns false. The hasAlpha(),
    setMask() and mask() functions are legacy and should not be used.
    They are potentially very slow.

    The createHeuristicMask() function creates and returns a 1-bpp
    heuristic mask (i.e. a QBitmap) for this pixmap. It works by
    selecting a color from one of the corners and then chipping away
    pixels of that color, starting at all the edges. The
    createMaskFromColor() function creates and returns a mask (i.e. a
    QBitmap) for the pixmap based on a given color.

    \row
    \o Low-level information
    \o

    The depth() function returns the depth of the pixmap. The
    defaultDepth() function returns the default depth, i.e. the depth
    used by the application on the given screen.

    The cacheKey() function returns a number that uniquely
    identifies the contents of the QPixmap object.

    The x11Info() function returns information about the configuration
    of the X display used by the screen to which the pixmap currently
    belongs. The x11PictureHandle() function returns the X11 Picture
    handle of the pixmap for XRender support. Note that the two latter
    functions are only available on x11.

    \endtable

    \section1 Pixmap Conversion

    A QPixmap object can be converted into a QImage using the
    toImage() function. Likewise, a QImage can be converted into a
    QPixmap using the fromImage(). If this is too expensive an
    operation, you can use QBitmap::fromImage() instead.

    In addition, on Windows, the QPixmap class supports conversion to
    and from HBITMAP: the toWinHBITMAP() function creates a HBITMAP
    equivalent to the QPixmap, based on the given HBitmapFormat, and
    returns the HBITMAP handle. The fromWinHBITMAP() function returns
    a QPixmap that is equivalent to the given bitmap which has the
    specified format. The QPixmap class also supports conversion to
    and from HICON: the toWinHICON() function creates a HICON equivalent
    to the QPixmap, and returns the HICON handle. The fromWinHICON()
    function returns a QPixmap that is equivalent to the given icon.

    In addition, on Symbian, the QPixmap class supports conversion to
    and from CFbsBitmap: the toSymbianCFbsBitmap() function creates
    CFbsBitmap equivalent to the QPixmap, based on given mode and returns
    a CFbsBitmap object. The fromSymbianCFbsBitmap() function returns a
    QPixmap that is equivalent to the given bitmap and given mode.

    \section1 Pixmap Transformations

    QPixmap supports a number of functions for creating a new pixmap
    that is a transformed version of the original:

    The scaled(), scaledToWidth() and scaledToHeight() functions
    return scaled copies of the pixmap, while the copy() function
    creates a QPixmap that is a plain copy of the original one.

    The transformed() function returns a copy of the pixmap that is
    transformed with the given transformation matrix and
    transformation mode: Internally, the transformation matrix is
    adjusted to compensate for unwanted translation,
    i.e. transformed() returns the smallest pixmap containing all
    transformed points of the original pixmap. The static trueMatrix()
    function returns the actual matrix used for transforming the
    pixmap.

    \note When using the native X11 graphics system, the pixmap
    becomes invalid when the QApplication instance is destroyed.

    \sa QBitmap, QImage, QImageReader, QImageWriter
*/


/*!
    \typedef QPixmap::DataPtr
    \internal
*/

/*!
    \fn DataPtr &QPixmap::data_ptr()
    \internal
*/

/*!
    Returns true if this pixmap has an alpha channel, \e or has a
    mask, otherwise returns false.

    \sa hasAlphaChannel(), mask()
*/
bool QPixmap::hasAlpha() const
{
#if defined(Q_WS_X11)
    if (data && data->hasAlphaChannel())
        return true;
    QPixmapData *pd = pixmapData();
    if (pd && pd->classId() == QPixmapData::X11Class) {
        QX11PixmapData *x11Data = static_cast<QX11PixmapData*>(pd);
#ifndef QT_NO_XRENDER
        if (x11Data->picture && x11Data->d == 32)
            return true;
#endif
        if (x11Data->d == 1 || x11Data->x11_mask)
            return true;
    }
    return false;
#else
    return data && data->hasAlphaChannel();
#endif
}

/*!
    Returns true if the pixmap has a format that respects the alpha
    channel, otherwise returns false.

    \sa hasAlpha()
*/
bool QPixmap::hasAlphaChannel() const
{
    return data && data->hasAlphaChannel();
}

/*!
    \internal
*/
int QPixmap::metric(PaintDeviceMetric metric) const
{
    return data ? data->metric(metric) : 0;
}

/*!
    \fn void QPixmap::setAlphaChannel(const QPixmap &alphaChannel)
    \obsolete

    Sets the alpha channel of this pixmap to the given \a alphaChannel
    by converting the \a alphaChannel into 32 bit and using the
    intensity of the RGB pixel values.

    The effect of this function is undefined when the pixmap is being
    painted on.

    \warning This is potentially an expensive operation. Most usecases
    for this function are covered by QPainter and compositionModes
    which will normally execute faster.

    \sa alphaChannel(), {QPixmap#Pixmap Transformations}{Pixmap
    Transformations}
 */
void QPixmap::setAlphaChannel(const QPixmap &alphaChannel)
{
    if (alphaChannel.isNull())
        return;

    if (paintingActive()) {
        qWarning("QPixmap::setAlphaChannel: "
                 "Cannot set alpha channel while pixmap is being painted on");
        return;
    }

    if (width() != alphaChannel.width() && height() != alphaChannel.height()) {
        qWarning("QPixmap::setAlphaChannel: "
                 "The pixmap and the alpha channel pixmap must have the same size");
        return;
    }

    detach();
    data->setAlphaChannel(alphaChannel);
}

/*!
    \obsolete

    Returns the alpha channel of the pixmap as a new grayscale QPixmap in which
    each pixel's red, green, and blue values are given the alpha value of the
    original pixmap. The color depth of the returned pixmap is the system depth
    on X11 and 8-bit on Windows and Mac OS X.

    You can use this function while debugging
    to get a visible image of the alpha channel. If the pixmap doesn't have an
    alpha channel, i.e., the alpha channel's value for all pixels equals
    0xff), a null pixmap is returned. You can check this with the \c isNull()
    function.

    We show an example:

    \snippet doc/src/snippets/alphachannel.cpp 0

    \image alphachannelimage.png The pixmap and channelImage QPixmaps

    \warning This is an expensive operation. The alpha channel of the
    pixmap is extracted dynamically from the pixeldata. Most usecases of this
    function are covered by QPainter and compositionModes which will normally
    execute faster.

    \sa setAlphaChannel(), {QPixmap#Pixmap Information}{Pixmap
    Information}
*/
QPixmap QPixmap::alphaChannel() const
{
    return data ? data->alphaChannel() : QPixmap();
}

/*!
    \internal
*/
QPaintEngine *QPixmap::paintEngine() const
{
    return data ? data->paintEngine() : 0;
}

/*!
    \fn QBitmap QPixmap::mask() const

    Extracts a bitmap mask from the pixmap's alpha channel.

    \warning This is potentially an expensive operation. The mask of
    the pixmap is extracted dynamically from the pixeldata.

    \sa setMask(), {QPixmap#Pixmap Information}{Pixmap Information}
*/
QBitmap QPixmap::mask() const
{
    return data ? data->mask() : QBitmap();
}

/*!
    Returns the default pixmap depth used by the application.

    On Windows and Mac, the default depth is always 32. On X11 and
    embedded, the depth of the screen will be returned by this
    function.

    \sa depth(), QColormap::depth(), {QPixmap#Pixmap Information}{Pixmap Information}

*/
int QPixmap::defaultDepth()
{
#if defined(Q_WS_QWS)
    return QScreen::instance()->depth();
#elif defined(Q_WS_X11)
    return QX11Info::appDepth();
#elif defined(Q_WS_WINCE)
    return QColormap::instance().depth();
#elif defined(Q_WS_WIN)
    return 32; // XXX
#elif defined(Q_WS_MAC)
    return 32;
#elif defined(Q_OS_SYMBIAN)
    return S60->screenDepth;
#elif defined(Q_WS_QPA)
    return 32; //LITE: use graphicssystem (we should do that in general)
#endif
}

/*!
    Detaches the pixmap from shared pixmap data.

    A pixmap is automatically detached by Qt whenever its contents are
    about to change. This is done in almost all QPixmap member
    functions that modify the pixmap (fill(), fromImage(),
    load(), etc.), and in QPainter::begin() on a pixmap.

    There are two exceptions in which detach() must be called
    explicitly, that is when calling the handle() or the
    x11PictureHandle() function (only available on X11). Otherwise,
    any modifications done using system calls, will be performed on
    the shared data.

    The detach() function returns immediately if there is just a
    single reference or if the pixmap has not been initialized yet.
*/
void QPixmap::detach()
{
    if (!data)
        return;

    // QPixmap.data member may be QRuntimePixmapData so use pixmapData() function to get
    // the actual underlaying runtime pixmap data.
    QPixmapData *pd = pixmapData();
    QPixmapData::ClassId id = pd->classId();
    if (id == QPixmapData::RasterClass) {
        QRasterPixmapData *rasterData = static_cast<QRasterPixmapData*>(pd);
        rasterData->image.detach();
    }

    if (data->is_cached && data->ref == 1)
        QImagePixmapCleanupHooks::executePixmapDataModificationHooks(data.data());

#if defined(Q_WS_MAC)
    QMacPixmapData *macData = id == QPixmapData::MacClass ? static_cast<QMacPixmapData*>(pd) : 0;
    if (macData) {
        if (macData->cg_mask) {
            CGImageRelease(macData->cg_mask);
            macData->cg_mask = 0;
        }
    }
#endif

    if (data->ref != 1) {
        *this = copy();
    }
    ++data->detach_no;

#if defined(Q_WS_X11)
    if (pd->classId() == QPixmapData::X11Class) {
        QX11PixmapData *d = static_cast<QX11PixmapData*>(pd);
        d->flags &= ~QX11PixmapData::Uninitialized;

        // reset the cache data
        if (d->hd2) {
            XFreePixmap(X11->display, d->hd2);
            d->hd2 = 0;
        }
    }
#elif defined(Q_WS_MAC)
    if (macData) {
        macData->macReleaseCGImageRef();
        macData->uninit = false;
    }
#endif
}

/*!
    \fn QPixmap QPixmap::fromImage(const QImage &image, Qt::ImageConversionFlags flags)

    Converts the given \a image to a pixmap using the specified \a
    flags to control the conversion.  The \a flags argument is a
    bitwise-OR of the \l{Qt::ImageConversionFlags}. Passing 0 for \a
    flags sets all the default options.

    In case of monochrome and 8-bit images, the image is first
    converted to a 32-bit pixmap and then filled with the colors in
    the color table. If this is too expensive an operation, you can
    use QBitmap::fromImage() instead.

    \sa fromImageReader(), toImage(), {QPixmap#Pixmap Conversion}{Pixmap Conversion}
*/
QPixmap QPixmap::fromImage(const QImage &image, Qt::ImageConversionFlags flags)
{
    if (image.isNull())
        return QPixmap();

    QGraphicsSystem* gs = QApplicationPrivate::graphicsSystem();
    QScopedPointer<QPixmapData> data(gs ? gs->createPixmapData(QPixmapData::PixmapType)
            : QGraphicsSystem::createDefaultPixmapData(QPixmapData::PixmapType));
    data->fromImage(image, flags);
    return QPixmap(data.take());
}

/*!
    \fn QPixmap QPixmap::fromImageReader(QImageReader *imageReader, Qt::ImageConversionFlags flags)

    Create a QPixmap from an image read directly from an \a imageReader.
    The \a flags argument is a bitwise-OR of the \l{Qt::ImageConversionFlags}.
    Passing 0 for \a flags sets all the default options.

    On some systems, reading an image directly to QPixmap can use less memory than
    reading a QImage to convert it to QPixmap.

    \sa fromImage(), toImage(), {QPixmap#Pixmap Conversion}{Pixmap Conversion}
*/
QPixmap QPixmap::fromImageReader(QImageReader *imageReader, Qt::ImageConversionFlags flags)
{
    QGraphicsSystem *gs = QApplicationPrivate::graphicsSystem();
    QScopedPointer<QPixmapData> data(gs ? gs->createPixmapData(QPixmapData::PixmapType)
            : QGraphicsSystem::createDefaultPixmapData(QPixmapData::PixmapType));
    data->fromImageReader(imageReader, flags);
    return QPixmap(data.take());
}

/*!
    \fn QPixmap QPixmap::grabWindow(WId window, int x, int y, int
    width, int height)

    Creates and returns a pixmap constructed by grabbing the contents
    of the given \a window restricted by QRect(\a x, \a y, \a width,
    \a height).

    The arguments (\a{x}, \a{y}) specify the offset in the window,
    whereas (\a{width}, \a{height}) specify the area to be copied.  If
    \a width is negative, the function copies everything to the right
    border of the window. If \a height is negative, the function
    copies everything to the bottom of the window.

    The window system identifier (\c WId) can be retrieved using the
    QWidget::winId() function. The rationale for using a window
    identifier and not a QWidget, is to enable grabbing of windows
    that are not part of the application, window system frames, and so
    on.

    The grabWindow() function grabs pixels from the screen, not from
    the window, i.e. if there is another window partially or entirely
    over the one you grab, you get pixels from the overlying window,
    too. The mouse cursor is generally not grabbed.

    Note on X11 that if the given \a window doesn't have the same depth
    as the root window, and another window partially or entirely
    obscures the one you grab, you will \e not get pixels from the
    overlying window.  The contents of the obscured areas in the
    pixmap will be undefined and uninitialized.

    On Windows Vista and above grabbing a layered window, which is
    created by setting the Qt::WA_TranslucentBackground attribute, will
    not work. Instead grabbing the desktop widget should work.

    \warning In general, grabbing an area outside the screen is not
    safe. This depends on the underlying window system.

    \sa grabWidget(), {Screenshot Example}
*/

/*!
  \internal
*/
QPixmapData* QPixmap::pixmapData() const
{
    if (data) {
        QPixmapData* pm = data.data();
        return pm->runtimeData() ? pm->runtimeData() : pm;
    }

    return 0;
}


/*!
    \enum QPixmap::HBitmapFormat

    \bold{Win32 only:} This enum defines how the conversion between \c
    HBITMAP and QPixmap is performed.

    \warning This enum is only available on Windows.

    \value NoAlpha The alpha channel is ignored and always treated as
    being set to fully opaque. This is preferred if the \c HBITMAP is
    used with standard GDI calls, such as \c BitBlt().

    \value PremultipliedAlpha The \c HBITMAP is treated as having an
    alpha channel and premultiplied colors. This is preferred if the
    \c HBITMAP is accessed through the \c AlphaBlend() GDI function.

    \value Alpha The \c HBITMAP is treated as having a plain alpha
    channel. This is the preferred format if the \c HBITMAP is going
    to be used as an application icon or systray icon.

    \sa fromWinHBITMAP(), toWinHBITMAP()
*/

/*! \fn HBITMAP QPixmap::toWinHBITMAP(HBitmapFormat format) const
    \bold{Win32 only:} Creates a \c HBITMAP equivalent to the QPixmap,
    based on the given \a format. Returns the \c HBITMAP handle.

    It is the caller's responsibility to free the \c HBITMAP data
    after use.

    \warning This function is only available on Windows.

    \sa fromWinHBITMAP(), {QPixmap#Pixmap Conversion}{Pixmap Conversion}
*/

/*! \fn QPixmap QPixmap::fromWinHBITMAP(HBITMAP bitmap, HBitmapFormat format)
    \bold{Win32 only:} Returns a QPixmap that is equivalent to the
    given \a bitmap. The conversion is based on the specified \a
    format.

    \warning This function is only available on Windows.

    \sa toWinHBITMAP(), {QPixmap#Pixmap Conversion}{Pixmap Conversion}

*/

/*! \fn HICON QPixmap::toWinHICON() const
    \since 4.6

    \bold{Win32 only:} Creates a \c HICON equivalent to the QPixmap.
    Returns the \c HICON handle.

    It is the caller's responsibility to free the \c HICON data after use.

    \warning This function is only available on Windows.

    \sa fromWinHICON(), {QPixmap#Pixmap Conversion}{Pixmap Conversion}
*/

/*! \fn QPixmap QPixmap::fromWinHICON(HICON icon)
    \since 4.6

    \bold{Win32 only:} Returns a QPixmap that is equivalent to the given
    \a icon.

    \warning This function is only available on Windows.

    \sa toWinHICON(), {QPixmap#Pixmap Conversion}{Pixmap Conversion}

*/

/*! \fn const QX11Info &QPixmap::x11Info() const
    \bold{X11 only:} Returns information about the configuration of
    the X display used by the screen to which the pixmap currently belongs.

    \warning This function is only available on X11.

    \sa {QPixmap#Pixmap Information}{Pixmap Information}
*/

/*! \fn Qt::HANDLE QPixmap::x11PictureHandle() const
    \bold{X11 only:} Returns the X11 Picture handle of the pixmap for
    XRender support.

    This function will return 0 if XRender support is not compiled
    into Qt, if the XRender extension is not supported on the X11
    display, or if the handle could not be created. Use of this
    function is not portable.

    \warning This function is only available on X11.

    \sa {QPixmap#Pixmap Information}{Pixmap Information}
*/

/*! \fn int QPixmap::x11SetDefaultScreen(int screen)
  \internal
*/

/*! \fn void QPixmap::x11SetScreen(int screen)
  \internal
*/

/*! \fn QRgb* QPixmap::clut() const
    \internal
*/

/*! \fn int QPixmap::numCols() const
    \obsolete
    \internal
    \sa colorCount()
*/

/*! \fn int QPixmap::colorCount() const
    \since 4.6
    \internal
*/

/*! \fn const uchar* QPixmap::qwsBits() const
    \internal
    \since 4.1
*/

/*! \fn int QPixmap::qwsBytesPerLine() const
    \internal
    \since 4.1
*/

QT_END_NAMESPACE