summaryrefslogtreecommitdiffstats
path: root/src/gui/image/qimage.cpp
blob: 7999ce6bbe8365c6b47210df133222d6e1c71e82 (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
2296
2297
2298
2299
2300
2301
2302
2303
2304
2305
2306
2307
2308
2309
2310
2311
2312
2313
2314
2315
2316
2317
2318
2319
2320
2321
2322
2323
2324
2325
2326
2327
2328
2329
2330
2331
2332
2333
2334
2335
2336
2337
2338
2339
2340
2341
2342
2343
2344
2345
2346
2347
2348
2349
2350
2351
2352
2353
2354
2355
2356
2357
2358
2359
2360
2361
2362
2363
2364
2365
2366
2367
2368
2369
2370
2371
2372
2373
2374
2375
2376
2377
2378
2379
2380
2381
2382
2383
2384
2385
2386
2387
2388
2389
2390
2391
2392
2393
2394
2395
2396
2397
2398
2399
2400
2401
2402
2403
2404
2405
2406
2407
2408
2409
2410
2411
2412
2413
2414
2415
2416
2417
2418
2419
2420
2421
2422
2423
2424
2425
2426
2427
2428
2429
2430
2431
2432
2433
2434
2435
2436
2437
2438
2439
2440
2441
2442
2443
2444
2445
2446
2447
2448
2449
2450
2451
2452
2453
2454
2455
2456
2457
2458
2459
2460
2461
2462
2463
2464
2465
2466
2467
2468
2469
2470
2471
2472
2473
2474
2475
2476
2477
2478
2479
2480
2481
2482
2483
2484
2485
2486
2487
2488
2489
2490
2491
2492
2493
2494
2495
2496
2497
2498
2499
2500
2501
2502
2503
2504
2505
2506
2507
2508
2509
2510
2511
2512
2513
2514
2515
2516
2517
2518
2519
2520
2521
2522
2523
2524
2525
2526
2527
2528
2529
2530
2531
2532
2533
2534
2535
2536
2537
2538
2539
2540
2541
2542
2543
2544
2545
2546
2547
2548
2549
2550
2551
2552
2553
2554
2555
2556
2557
2558
2559
2560
2561
2562
2563
2564
2565
2566
2567
2568
2569
2570
2571
2572
2573
2574
2575
2576
2577
2578
2579
2580
2581
2582
2583
2584
2585
2586
2587
2588
2589
2590
2591
2592
2593
2594
2595
2596
2597
2598
2599
2600
2601
2602
2603
2604
2605
2606
2607
2608
2609
2610
2611
2612
2613
2614
2615
2616
2617
2618
2619
2620
2621
2622
2623
2624
2625
2626
2627
2628
2629
2630
2631
2632
2633
2634
2635
2636
2637
2638
2639
2640
2641
2642
2643
2644
2645
2646
2647
2648
2649
2650
2651
2652
2653
2654
2655
2656
2657
2658
2659
2660
2661
2662
2663
2664
2665
2666
2667
2668
2669
2670
2671
2672
2673
2674
2675
2676
2677
2678
2679
2680
2681
2682
2683
2684
2685
2686
2687
2688
2689
2690
2691
2692
2693
2694
2695
2696
2697
2698
2699
2700
2701
2702
2703
2704
2705
2706
2707
2708
2709
2710
2711
2712
2713
2714
2715
2716
2717
2718
2719
2720
2721
2722
2723
2724
2725
2726
2727
2728
2729
2730
2731
2732
2733
2734
2735
2736
2737
2738
2739
2740
2741
2742
2743
2744
2745
2746
2747
2748
2749
2750
2751
2752
2753
2754
2755
2756
2757
2758
2759
2760
2761
2762
2763
2764
2765
2766
2767
2768
2769
2770
2771
2772
2773
2774
2775
2776
2777
2778
2779
2780
2781
2782
2783
2784
2785
2786
2787
2788
2789
2790
2791
2792
2793
2794
2795
2796
2797
2798
2799
2800
2801
2802
2803
2804
2805
2806
2807
2808
2809
2810
2811
2812
2813
2814
2815
2816
2817
2818
2819
2820
2821
2822
2823
2824
2825
2826
2827
2828
2829
2830
2831
2832
2833
2834
2835
2836
2837
2838
2839
2840
2841
2842
2843
2844
2845
2846
2847
2848
2849
2850
2851
2852
2853
2854
2855
2856
2857
2858
2859
2860
2861
2862
2863
2864
2865
2866
2867
2868
2869
2870
2871
2872
2873
2874
2875
2876
2877
2878
2879
2880
2881
2882
2883
2884
2885
2886
2887
2888
2889
2890
2891
2892
2893
2894
2895
2896
2897
2898
2899
2900
2901
2902
2903
2904
2905
2906
2907
2908
2909
2910
2911
2912
2913
2914
2915
2916
2917
2918
2919
2920
2921
2922
2923
2924
2925
2926
2927
2928
2929
2930
2931
2932
2933
2934
2935
2936
2937
2938
2939
2940
2941
2942
2943
2944
2945
2946
2947
2948
2949
2950
2951
2952
2953
2954
2955
2956
2957
2958
2959
2960
2961
2962
2963
2964
2965
2966
2967
2968
2969
2970
2971
2972
2973
2974
2975
2976
2977
2978
2979
2980
2981
2982
2983
2984
2985
2986
2987
2988
2989
2990
2991
2992
2993
2994
2995
2996
2997
2998
2999
3000
3001
3002
3003
3004
3005
3006
3007
3008
3009
3010
3011
3012
3013
3014
3015
3016
3017
3018
3019
3020
3021
3022
3023
3024
3025
3026
3027
3028
3029
3030
3031
3032
3033
3034
3035
3036
3037
3038
3039
3040
3041
3042
3043
3044
3045
3046
3047
3048
3049
3050
3051
3052
3053
3054
3055
3056
3057
3058
3059
3060
3061
3062
3063
3064
3065
3066
3067
3068
3069
3070
3071
3072
3073
3074
3075
3076
3077
3078
3079
3080
3081
3082
3083
3084
3085
3086
3087
3088
3089
3090
3091
3092
3093
3094
3095
3096
3097
3098
3099
3100
3101
3102
3103
3104
3105
3106
3107
3108
3109
3110
3111
3112
3113
3114
3115
3116
3117
3118
3119
3120
3121
3122
3123
3124
3125
3126
3127
3128
3129
3130
3131
3132
3133
3134
3135
3136
3137
3138
3139
3140
3141
3142
3143
3144
3145
3146
3147
3148
3149
3150
3151
3152
3153
3154
3155
3156
3157
3158
3159
3160
3161
3162
3163
3164
3165
3166
3167
3168
3169
3170
3171
3172
3173
3174
3175
3176
3177
3178
3179
3180
3181
3182
3183
3184
3185
3186
3187
3188
3189
3190
3191
3192
3193
3194
3195
3196
3197
3198
3199
3200
3201
3202
3203
3204
3205
3206
3207
3208
3209
3210
3211
3212
3213
3214
3215
3216
3217
3218
3219
3220
3221
3222
3223
3224
3225
3226
3227
3228
3229
3230
3231
3232
3233
3234
3235
3236
3237
3238
3239
3240
3241
3242
3243
3244
3245
3246
3247
3248
3249
3250
3251
3252
3253
3254
3255
3256
3257
3258
3259
3260
3261
3262
3263
3264
3265
3266
3267
3268
3269
3270
3271
3272
3273
3274
3275
3276
3277
3278
3279
3280
3281
3282
3283
3284
3285
3286
3287
3288
3289
3290
3291
3292
3293
3294
3295
3296
3297
3298
3299
3300
3301
3302
3303
3304
3305
3306
3307
3308
3309
3310
3311
3312
3313
3314
3315
3316
3317
3318
3319
3320
3321
3322
3323
3324
3325
3326
3327
3328
3329
3330
3331
3332
3333
3334
3335
3336
3337
3338
3339
3340
3341
3342
3343
3344
3345
3346
3347
3348
3349
3350
3351
3352
3353
3354
3355
3356
3357
3358
3359
3360
3361
3362
3363
3364
3365
3366
3367
3368
3369
3370
3371
3372
3373
3374
3375
3376
3377
3378
3379
3380
3381
3382
3383
3384
3385
3386
3387
3388
3389
3390
3391
3392
3393
3394
3395
3396
3397
3398
3399
3400
3401
3402
3403
3404
3405
3406
3407
3408
3409
3410
3411
3412
3413
3414
3415
3416
3417
3418
3419
3420
3421
3422
3423
3424
3425
3426
3427
3428
3429
3430
3431
3432
3433
3434
3435
3436
3437
3438
3439
3440
3441
3442
3443
3444
3445
3446
3447
3448
3449
3450
3451
3452
3453
3454
3455
3456
3457
3458
3459
3460
3461
3462
3463
3464
3465
3466
3467
3468
3469
3470
3471
3472
3473
3474
3475
3476
3477
3478
3479
3480
3481
3482
3483
3484
3485
3486
3487
3488
3489
3490
3491
3492
3493
3494
3495
3496
3497
3498
3499
3500
3501
3502
3503
3504
3505
3506
3507
3508
3509
3510
3511
3512
3513
3514
3515
3516
3517
3518
3519
3520
3521
3522
3523
3524
3525
3526
3527
3528
3529
3530
3531
3532
3533
3534
3535
3536
3537
3538
3539
3540
3541
3542
3543
3544
3545
3546
3547
3548
3549
3550
3551
3552
3553
3554
3555
3556
3557
3558
3559
3560
3561
3562
3563
3564
3565
3566
3567
3568
3569
3570
3571
3572
3573
3574
3575
3576
3577
3578
3579
3580
3581
3582
3583
3584
3585
3586
3587
3588
3589
3590
3591
3592
3593
3594
3595
3596
3597
3598
3599
3600
3601
3602
3603
3604
3605
3606
3607
3608
3609
3610
3611
3612
3613
3614
3615
3616
3617
3618
3619
3620
3621
3622
3623
3624
3625
3626
3627
3628
3629
3630
3631
3632
3633
3634
3635
3636
3637
3638
3639
3640
3641
3642
3643
3644
3645
3646
3647
3648
3649
3650
3651
3652
3653
3654
3655
3656
3657
3658
3659
3660
3661
3662
3663
3664
3665
3666
3667
3668
3669
3670
3671
3672
3673
3674
3675
3676
3677
3678
3679
3680
3681
3682
3683
3684
3685
3686
3687
3688
3689
3690
3691
3692
3693
3694
3695
3696
3697
3698
3699
3700
3701
3702
3703
3704
3705
3706
3707
3708
3709
3710
3711
3712
3713
3714
3715
3716
3717
3718
3719
3720
3721
3722
3723
3724
3725
3726
3727
3728
3729
3730
3731
3732
3733
3734
3735
3736
3737
3738
3739
3740
3741
3742
3743
3744
3745
3746
3747
3748
3749
3750
3751
3752
3753
3754
3755
3756
3757
3758
3759
3760
3761
3762
3763
3764
3765
3766
3767
3768
3769
3770
3771
3772
3773
3774
3775
3776
3777
3778
3779
3780
3781
3782
3783
3784
3785
3786
3787
3788
3789
3790
3791
3792
3793
3794
3795
3796
3797
3798
3799
3800
3801
3802
3803
3804
3805
3806
3807
3808
3809
3810
3811
3812
3813
3814
3815
3816
3817
3818
3819
3820
3821
3822
3823
3824
3825
3826
3827
3828
3829
3830
3831
3832
3833
3834
3835
3836
3837
3838
3839
3840
3841
3842
3843
3844
3845
3846
3847
3848
3849
3850
3851
3852
3853
3854
3855
3856
3857
3858
3859
3860
3861
3862
3863
3864
3865
3866
3867
3868
3869
3870
3871
3872
3873
3874
3875
3876
3877
3878
3879
3880
3881
3882
3883
3884
3885
3886
3887
3888
3889
3890
3891
3892
3893
3894
3895
3896
3897
3898
3899
3900
3901
3902
3903
3904
3905
3906
3907
3908
3909
3910
3911
3912
3913
3914
3915
3916
3917
3918
3919
3920
3921
3922
3923
3924
3925
3926
3927
3928
3929
3930
3931
3932
3933
3934
3935
3936
3937
3938
3939
3940
3941
3942
3943
3944
3945
3946
3947
3948
3949
3950
3951
3952
3953
3954
3955
3956
3957
3958
3959
3960
3961
3962
3963
3964
3965
3966
3967
3968
3969
3970
3971
3972
3973
3974
3975
3976
3977
3978
3979
3980
3981
3982
3983
3984
3985
3986
3987
3988
3989
3990
3991
3992
3993
3994
3995
3996
3997
3998
3999
4000
4001
4002
4003
4004
4005
4006
4007
4008
4009
4010
4011
4012
4013
4014
4015
4016
4017
4018
4019
4020
4021
4022
4023
4024
4025
4026
4027
4028
4029
4030
4031
4032
4033
4034
4035
4036
4037
4038
4039
4040
4041
4042
4043
4044
4045
4046
4047
4048
4049
4050
4051
4052
4053
4054
4055
4056
4057
4058
4059
4060
4061
4062
4063
4064
4065
4066
4067
4068
4069
4070
4071
4072
4073
4074
4075
4076
4077
4078
4079
4080
4081
4082
4083
4084
4085
4086
4087
4088
4089
4090
4091
4092
4093
4094
4095
4096
4097
4098
4099
4100
4101
4102
4103
4104
4105
4106
4107
4108
4109
4110
4111
4112
4113
4114
4115
4116
4117
4118
4119
4120
4121
4122
4123
4124
4125
4126
4127
4128
4129
4130
4131
4132
4133
4134
4135
4136
4137
4138
4139
4140
4141
4142
4143
4144
4145
4146
4147
4148
4149
4150
4151
4152
4153
4154
4155
4156
4157
4158
4159
4160
4161
4162
4163
4164
4165
4166
4167
4168
4169
4170
4171
4172
4173
4174
4175
4176
4177
4178
4179
4180
4181
4182
4183
4184
4185
4186
4187
4188
4189
4190
4191
4192
4193
4194
4195
4196
4197
4198
4199
4200
4201
4202
4203
4204
4205
4206
4207
4208
4209
4210
4211
4212
4213
4214
4215
4216
4217
4218
4219
4220
4221
4222
4223
4224
4225
4226
4227
4228
4229
4230
4231
4232
4233
4234
4235
4236
4237
4238
4239
4240
4241
4242
4243
4244
4245
4246
4247
4248
4249
4250
4251
4252
4253
4254
4255
4256
4257
4258
4259
4260
4261
4262
4263
4264
4265
4266
4267
4268
4269
4270
4271
4272
4273
4274
4275
4276
4277
4278
4279
4280
4281
4282
4283
4284
4285
4286
4287
4288
4289
4290
4291
4292
4293
4294
4295
4296
4297
4298
4299
4300
4301
4302
4303
4304
4305
4306
4307
4308
4309
4310
4311
4312
4313
4314
4315
4316
4317
4318
4319
4320
4321
4322
4323
4324
4325
4326
4327
4328
4329
4330
4331
4332
4333
4334
4335
4336
4337
4338
4339
4340
4341
4342
4343
4344
4345
4346
4347
4348
4349
4350
4351
4352
4353
4354
4355
4356
4357
4358
4359
4360
4361
4362
4363
4364
4365
4366
4367
4368
4369
4370
4371
4372
4373
4374
4375
4376
4377
4378
4379
4380
4381
4382
4383
4384
4385
4386
4387
4388
4389
4390
4391
4392
4393
4394
4395
4396
4397
4398
4399
4400
4401
4402
4403
4404
4405
4406
4407
4408
4409
4410
4411
4412
4413
4414
4415
4416
4417
4418
4419
4420
4421
4422
4423
4424
4425
4426
4427
4428
4429
4430
4431
4432
4433
4434
4435
4436
4437
4438
4439
4440
4441
4442
4443
4444
4445
4446
4447
4448
4449
4450
4451
4452
4453
4454
4455
4456
4457
4458
4459
4460
4461
4462
4463
4464
4465
4466
4467
4468
4469
4470
4471
4472
4473
4474
4475
4476
4477
4478
4479
4480
4481
4482
4483
4484
4485
4486
4487
4488
4489
4490
4491
4492
4493
4494
4495
4496
4497
4498
4499
4500
4501
4502
4503
4504
4505
4506
4507
4508
4509
4510
4511
4512
4513
4514
4515
4516
4517
4518
4519
4520
4521
4522
4523
4524
4525
4526
4527
4528
4529
4530
4531
4532
4533
4534
4535
4536
4537
4538
4539
4540
4541
4542
4543
4544
4545
4546
4547
4548
4549
4550
4551
4552
4553
4554
4555
4556
4557
4558
4559
4560
4561
4562
4563
4564
4565
4566
4567
4568
4569
4570
4571
4572
4573
4574
4575
4576
4577
4578
4579
4580
4581
4582
4583
4584
4585
4586
4587
4588
4589
4590
4591
4592
4593
4594
4595
4596
4597
4598
4599
4600
4601
4602
4603
4604
4605
4606
4607
4608
4609
4610
4611
4612
4613
4614
4615
4616
4617
4618
4619
4620
4621
4622
4623
4624
4625
4626
4627
4628
4629
4630
4631
4632
4633
4634
4635
4636
4637
4638
4639
4640
4641
4642
4643
4644
4645
4646
4647
4648
4649
4650
4651
4652
4653
4654
4655
4656
4657
4658
4659
4660
4661
4662
4663
4664
4665
4666
4667
4668
4669
4670
4671
4672
4673
4674
4675
4676
4677
4678
4679
4680
4681
4682
4683
4684
4685
4686
4687
4688
4689
4690
4691
4692
4693
4694
4695
4696
4697
4698
4699
4700
4701
4702
4703
4704
4705
4706
4707
4708
4709
4710
4711
4712
4713
4714
4715
4716
4717
4718
4719
4720
4721
4722
4723
4724
4725
4726
4727
4728
4729
4730
4731
4732
4733
4734
4735
4736
4737
4738
4739
4740
4741
4742
4743
4744
4745
4746
4747
4748
4749
4750
4751
4752
4753
4754
4755
4756
4757
4758
4759
4760
4761
4762
4763
4764
4765
4766
4767
4768
4769
4770
4771
4772
4773
4774
4775
4776
4777
4778
4779
4780
4781
4782
4783
4784
4785
4786
4787
4788
4789
4790
4791
4792
4793
4794
4795
4796
4797
4798
4799
4800
4801
4802
4803
4804
4805
4806
4807
4808
4809
4810
4811
4812
4813
4814
4815
4816
4817
4818
4819
4820
4821
4822
4823
4824
4825
4826
4827
4828
4829
4830
4831
4832
4833
4834
4835
4836
4837
4838
4839
4840
4841
4842
4843
4844
4845
4846
4847
4848
4849
4850
4851
4852
4853
4854
4855
4856
4857
4858
4859
4860
4861
4862
4863
4864
4865
4866
4867
4868
4869
4870
4871
4872
4873
4874
4875
4876
4877
4878
4879
4880
4881
4882
4883
4884
4885
4886
4887
4888
4889
4890
4891
4892
4893
4894
4895
4896
4897
4898
4899
4900
4901
4902
4903
4904
4905
4906
4907
4908
4909
4910
4911
4912
4913
4914
4915
4916
4917
4918
4919
4920
4921
4922
4923
4924
4925
4926
4927
4928
4929
4930
4931
4932
4933
4934
4935
4936
4937
4938
4939
4940
4941
4942
4943
4944
4945
4946
4947
4948
4949
4950
4951
4952
4953
4954
4955
4956
4957
4958
4959
4960
4961
4962
4963
4964
4965
4966
4967
4968
4969
4970
4971
4972
4973
4974
4975
4976
4977
4978
4979
4980
4981
4982
4983
4984
4985
4986
4987
4988
4989
4990
4991
4992
4993
4994
4995
4996
4997
4998
4999
5000
5001
5002
5003
5004
5005
5006
5007
5008
5009
5010
5011
5012
5013
5014
5015
5016
5017
5018
5019
5020
5021
5022
5023
5024
5025
5026
5027
5028
5029
5030
5031
5032
5033
5034
5035
5036
5037
5038
5039
5040
5041
5042
5043
5044
5045
5046
5047
5048
5049
5050
5051
5052
5053
5054
5055
5056
5057
5058
5059
5060
5061
5062
5063
5064
5065
5066
5067
5068
5069
5070
5071
5072
5073
5074
5075
5076
5077
5078
5079
5080
5081
5082
5083
5084
5085
5086
5087
5088
5089
5090
5091
5092
5093
5094
5095
5096
5097
5098
5099
5100
5101
5102
5103
5104
5105
5106
5107
5108
5109
5110
5111
5112
5113
5114
5115
5116
5117
5118
5119
5120
5121
5122
5123
5124
5125
5126
5127
5128
5129
5130
5131
5132
5133
5134
5135
5136
5137
5138
5139
5140
5141
5142
5143
5144
5145
5146
5147
5148
5149
5150
5151
5152
5153
5154
5155
5156
5157
5158
5159
5160
5161
5162
5163
5164
5165
5166
5167
5168
5169
5170
5171
5172
5173
5174
5175
5176
5177
5178
5179
5180
5181
5182
5183
5184
5185
5186
5187
5188
5189
5190
5191
5192
5193
5194
5195
5196
5197
5198
5199
5200
5201
5202
5203
5204
5205
5206
5207
5208
5209
5210
5211
5212
5213
5214
5215
5216
5217
5218
5219
5220
5221
5222
5223
5224
5225
5226
5227
5228
5229
5230
5231
5232
5233
/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://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 https://www.qt.io/terms-conditions. For further
** information use the contact form at https://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 3 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL3 included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 3 requirements
** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 2.0 or (at your option) the GNU General
** Public license version 3 or any later version approved by the KDE Free
** Qt Foundation. The licenses are as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-2.0.html and
** https://www.gnu.org/licenses/gpl-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/

#include "qimage.h"
#include "qdatastream.h"
#include "qbuffer.h"
#include "qmap.h"
#include "qmatrix.h"
#include "qtransform.h"
#include "qimagereader.h"
#include "qimagewriter.h"
#include "qstringlist.h"
#include "qvariant.h"
#include "qimagepixmapcleanuphooks_p.h"
#include <qpa/qplatformintegration.h>
#include <private/qguiapplication_p.h>
#include <ctype.h>
#include <stdlib.h>
#include <limits.h>
#include <qpa/qplatformpixmap.h>
#include <private/qdrawhelper_p.h>
#include <private/qmemrotate_p.h>
#include <private/qimagescale_p.h>
#include <private/qsimd_p.h>

#include <qhash.h>

#include <private/qpaintengine_raster_p.h>

#include <private/qimage_p.h>
#include <private/qfont_p.h>

QT_BEGIN_NAMESPACE

static inline bool isLocked(QImageData *data)
{
    return data != 0 && data->is_locked;
}

#if defined(Q_CC_DEC) && defined(__alpha) && (__DECCXX_VER-0 >= 50190001)
#pragma message disable narrowptr
#endif


#define QIMAGE_SANITYCHECK_MEMORY(image) \
    if ((image).isNull()) { \
        qWarning("QImage: out of memory, returning null image"); \
        return QImage(); \
    }


static QImage rotated90(const QImage &src);
static QImage rotated180(const QImage &src);
static QImage rotated270(const QImage &src);

static int next_qimage_serial_number()
{
    static QBasicAtomicInt serial = Q_BASIC_ATOMIC_INITIALIZER(0);
    return 1 + serial.fetchAndAddRelaxed(1);
}

QImageData::QImageData()
    : ref(0), width(0), height(0), depth(0), nbytes(0), devicePixelRatio(1.0), data(0),
      format(QImage::Format_ARGB32), bytes_per_line(0),
      ser_no(next_qimage_serial_number()),
      detach_no(0),
      dpmx(qt_defaultDpiX() * 100 / qreal(2.54)),
      dpmy(qt_defaultDpiY() * 100 / qreal(2.54)),
      offset(0, 0), own_data(true), ro_data(false), has_alpha_clut(false),
      is_cached(false), is_locked(false), cleanupFunction(0), cleanupInfo(0),
      paintEngine(0)
{
}

/*! \fn QImageData * QImageData::create(const QSize &size, QImage::Format format)

    \internal

    Creates a new image data.
    Returns 0 if invalid parameters are give or anything else failed.
*/
QImageData * QImageData::create(const QSize &size, QImage::Format format)
{
    if (!size.isValid() || format == QImage::Format_Invalid)
        return 0;                                // invalid parameter(s)

    uint width = size.width();
    uint height = size.height();
    uint depth = qt_depthForFormat(format);

    const int bytes_per_line = ((width * depth + 31) >> 5) << 2; // bytes per scanline (must be multiple of 4)

    // sanity check for potential overflows
    if (std::numeric_limits<int>::max()/depth < width
        || bytes_per_line <= 0
        || height <= 0
        || std::numeric_limits<qsizetype>::max()/uint(bytes_per_line) < height
        || std::numeric_limits<int>::max()/sizeof(uchar *) < uint(height))
        return 0;

    QScopedPointer<QImageData> d(new QImageData);

    switch (format) {
    case QImage::Format_Mono:
    case QImage::Format_MonoLSB:
        d->colortable.resize(2);
        d->colortable[0] = QColor(Qt::black).rgba();
        d->colortable[1] = QColor(Qt::white).rgba();
        break;
    default:
        break;
    }

    d->width = width;
    d->height = height;
    d->depth = depth;
    d->format = format;
    d->has_alpha_clut = false;
    d->is_cached = false;

    d->bytes_per_line = bytes_per_line;

    d->nbytes = d->bytes_per_line*height;
    d->data  = (uchar *)malloc(d->nbytes);

    if (!d->data) {
        return 0;
    }

    d->ref.ref();
    return d.take();

}

QImageData::~QImageData()
{
    if (cleanupFunction)
        cleanupFunction(cleanupInfo);
    if (is_cached)
        QImagePixmapCleanupHooks::executeImageHooks((((qint64) ser_no) << 32) | ((qint64) detach_no));
    delete paintEngine;
    if (data && own_data)
        free(data);
    data = 0;
}

#if defined(_M_ARM)
#pragma optimize("", off)
#endif

bool QImageData::checkForAlphaPixels() const
{
    bool has_alpha_pixels = false;

    switch (format) {

    case QImage::Format_Mono:
    case QImage::Format_MonoLSB:
    case QImage::Format_Indexed8:
        has_alpha_pixels = has_alpha_clut;
        break;
    case QImage::Format_Alpha8:
        has_alpha_pixels = true;
        break;
    case QImage::Format_ARGB32:
    case QImage::Format_ARGB32_Premultiplied: {
        const uchar *bits = data;
        for (int y=0; y<height && !has_alpha_pixels; ++y) {
            uint alphaAnd = 0xff000000;
            for (int x=0; x<width; ++x)
                alphaAnd &= reinterpret_cast<const uint*>(bits)[x];
            has_alpha_pixels = (alphaAnd != 0xff000000);
            bits += bytes_per_line;
        }
    } break;

    case QImage::Format_RGBA8888:
    case QImage::Format_RGBA8888_Premultiplied: {
        const uchar *bits = data;
        for (int y=0; y<height && !has_alpha_pixels; ++y) {
            uchar alphaAnd = 0xff;
            for (int x=0; x<width; ++x)
                alphaAnd &= bits[x * 4+ 3];
            has_alpha_pixels = (alphaAnd != 0xff);
            bits += bytes_per_line;
        }
    } break;

    case QImage::Format_A2BGR30_Premultiplied:
    case QImage::Format_A2RGB30_Premultiplied: {
        const uchar *bits = data;
        for (int y=0; y<height && !has_alpha_pixels; ++y) {
            uint alphaAnd = 0xc0000000;
            for (int x=0; x<width; ++x)
                alphaAnd &= reinterpret_cast<const uint*>(bits)[x];
            has_alpha_pixels = (alphaAnd != 0xc0000000);
            bits += bytes_per_line;
        }
    } break;

    case QImage::Format_ARGB8555_Premultiplied:
    case QImage::Format_ARGB8565_Premultiplied: {
        const uchar *bits = data;
        const uchar *end_bits = data + bytes_per_line;

        for (int y=0; y<height && !has_alpha_pixels; ++y) {
            uchar alphaAnd = 0xff;
            while (bits < end_bits) {
                alphaAnd &= bits[0];
                bits += 3;
            }
            has_alpha_pixels = (alphaAnd != 0xff);
            bits = end_bits;
            end_bits += bytes_per_line;
        }
    } break;

    case QImage::Format_ARGB6666_Premultiplied: {
        const uchar *bits = data;
        const uchar *end_bits = data + bytes_per_line;

        for (int y=0; y<height && !has_alpha_pixels; ++y) {
            uchar alphaAnd = 0xfc;
            while (bits < end_bits) {
                alphaAnd &= bits[0];
                bits += 3;
            }
            has_alpha_pixels = (alphaAnd != 0xfc);
            bits = end_bits;
            end_bits += bytes_per_line;
        }
    } break;

    case QImage::Format_ARGB4444_Premultiplied: {
        const uchar *bits = data;
        for (int y=0; y<height && !has_alpha_pixels; ++y) {
            ushort alphaAnd = 0xf000;
            for (int x=0; x<width; ++x)
                alphaAnd &= reinterpret_cast<const ushort*>(bits)[x];
            has_alpha_pixels = (alphaAnd != 0xf000);
            bits += bytes_per_line;
        }
    } break;

    case QImage::Format_RGB32:
    case QImage::Format_RGB16:
    case QImage::Format_RGB444:
    case QImage::Format_RGB555:
    case QImage::Format_RGB666:
    case QImage::Format_RGB888:
    case QImage::Format_RGBX8888:
    case QImage::Format_BGR30:
    case QImage::Format_RGB30:
    case QImage::Format_Grayscale8:
        break;
    case QImage::Format_Invalid:
    case QImage::NImageFormats:
        Q_UNREACHABLE();
        break;
    }

    return has_alpha_pixels;
}
#if defined(_M_ARM)
#pragma optimize("", on)
#endif

/*!
    \class QImage

    \inmodule QtGui
    \ingroup painting
    \ingroup shared

    \reentrant

    \brief The QImage class provides a hardware-independent image
    representation that allows direct access to the pixel data, and
    can be used as a paint device.

    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. Finally, the QPicture class is a paint device that
    records and replays QPainter commands.

    Because QImage is a QPaintDevice subclass, QPainter can be used to
    draw directly onto images.  When using QPainter on a QImage, the
    painting can be performed in another thread than the current GUI
    thread.

    The QImage class supports several image formats described by the
    \l Format enum. These include monochrome, 8-bit, 32-bit and
    alpha-blended images which are available in all versions of Qt
    4.x.

    QImage provides a collection of functions that can be used to
    obtain a variety of information about the image. There are also
    several functions that enables transformation of the image.

    QImage objects can be passed around by value since the QImage
    class uses \l{Implicit Data Sharing}{implicit data
    sharing}. QImage objects can also be streamed and compared.

    \note If you would like to load QImage objects in a static build of Qt,
    refer to the \l{How to Create Qt Plugins}{Plugin HowTo}.

    \warning Painting on a QImage with the format
    QImage::Format_Indexed8 is not supported.

    \tableofcontents

    \section1 Reading and Writing Image Files

    QImage provides several ways of loading an image file: The file
    can be loaded when constructing the QImage object, or by using the
    load() or loadFromData() functions later on. QImage also provides
    the static fromData() function, constructing a QImage from the
    given data.  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 QImage 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 \li Format \li Description                      \li Qt's support
    \row    \li BMP    \li Windows Bitmap                   \li Read/write
    \row    \li GIF    \li Graphic Interchange Format (optional) \li Read
    \row    \li JPG    \li Joint Photographic Experts Group \li Read/write
    \row    \li JPEG   \li Joint Photographic Experts Group \li Read/write
    \row    \li PNG    \li Portable Network Graphics        \li Read/write
    \row    \li PBM    \li Portable Bitmap                  \li Read
    \row    \li PGM    \li Portable Graymap                 \li Read
    \row    \li PPM    \li Portable Pixmap                  \li Read/write
    \row    \li XBM    \li X11 Bitmap                       \li Read/write
    \row    \li XPM    \li X11 Pixmap                       \li Read/write
    \endtable

    \section1 Image Information

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

    \table
    \header
    \li \li Available Functions

    \row
    \li Geometry
    \li

    The size(), width(), height(), dotsPerMeterX(), and
    dotsPerMeterY() functions provide information about the image size
    and aspect ratio.

    The rect() function returns the image's enclosing rectangle. The
    valid() function tells if a given pair of coordinates is within
    this rectangle. The offset() function returns the number of pixels
    by which the image is intended to be offset by when positioned
    relative to other images, which also can be manipulated using the
    setOffset() function.

    \row
    \li Colors
    \li

    The color of a pixel can be retrieved by passing its coordinates
    to the pixel() function.  The pixel() function returns the color
    as a QRgb value indepedent of the image's format.

    In case of monochrome and 8-bit images, the colorCount() and
    colorTable() functions provide information about the color
    components used to store the image data: The colorTable() function
    returns the image's entire color table. To obtain a single entry,
    use the pixelIndex() function to retrieve the pixel index for a
    given pair of coordinates, then use the color() function to
    retrieve the color. Note that if you create an 8-bit image
    manually, you have to set a valid color table on the image as
    well.

    The hasAlphaChannel() function tells if the image's format
    respects the alpha channel, or not. The allGray() and
    isGrayscale() functions tell whether an image's colors are all
    shades of gray.

    See also the \l {QImage#Pixel Manipulation}{Pixel Manipulation}
    and \l {QImage#Image Transformations}{Image Transformations}
    sections.

    \row
    \li Text
    \li

    The text() function returns the image text associated with the
    given text key. An image's text keys can be retrieved using the
    textKeys() function. Use the setText() function to alter an
    image's text.

    \row
    \li Low-level information
    \li

    The depth() function returns the depth of the image. The supported
    depths are 1 (monochrome), 8, 16, 24 and 32 bits. The
    bitPlaneCount() function tells how many of those bits that are
    used. For more information see the
    \l {QImage#Image Formats}{Image Formats} section.

    The format(), bytesPerLine(), and sizeInBytes() functions provide
    low-level information about the data stored in the image.

    The cacheKey() function returns a number that uniquely
    identifies the contents of this QImage object.
    \endtable

    \section1 Pixel Manipulation

    The functions used to manipulate an image's pixels depend on the
    image format. The reason is that monochrome and 8-bit images are
    index-based and use a color lookup table, while 32-bit images
    store ARGB values directly. For more information on image formats,
    see the \l {Image Formats} section.

    In case of a 32-bit image, the setPixel() function can be used to
    alter the color of the pixel at the given coordinates to any other
    color specified as an ARGB quadruplet. To make a suitable QRgb
    value, use the qRgb() (adding a default alpha component to the
    given RGB values, i.e. creating an opaque color) or qRgba()
    function. For example:

    \table
    \header
    \li {2,1}32-bit
    \row
    \li \inlineimage qimage-32bit_scaled.png
    \li
    \snippet code/src_gui_image_qimage.cpp 0
    \endtable

    In case of a 8-bit and monchrome images, the pixel value is only
    an index from the image's color table. So the setPixel() function
    can only be used to alter the color of the pixel at the given
    coordinates to a predefined color from the image's color table,
    i.e. it can only change the pixel's index value. To alter or add a
    color to an image's color table, use the setColor() function.

    An entry in the color table is an ARGB quadruplet encoded as an
    QRgb value. Use the qRgb() and qRgba() functions to make a
    suitable QRgb value for use with the setColor() function. For
    example:

    \table
    \header
    \li {2,1} 8-bit
    \row
    \li \inlineimage qimage-8bit_scaled.png
    \li
    \snippet code/src_gui_image_qimage.cpp 1
    \endtable

    For images with more than 8-bit per color-channel. The methods
    setPixelColor() and pixelColor() can be used to set and get
    with QColor values.

    QImage also provide the scanLine() function which returns a
    pointer to the pixel data at the scanline with the given index,
    and the bits() function which returns a pointer to the first pixel
    data (this is equivalent to \c scanLine(0)).

    \section1 Image Formats

    Each pixel stored in a QImage is represented by an integer. The
    size of the integer varies depending on the format. QImage
    supports several image formats described by the \l Format
    enum.

    Monochrome images are stored using 1-bit indexes into a color table
    with at most two colors. There are two different types of
    monochrome images: big endian (MSB first) or little endian (LSB
    first) bit order.

    8-bit images are stored using 8-bit indexes into a color table,
    i.e.  they have a single byte per pixel. The color table is a
    QVector<QRgb>, and the QRgb typedef is equivalent to an unsigned
    int containing an ARGB quadruplet on the format 0xAARRGGBB.

    32-bit images have no color table; instead, each pixel contains an
    QRgb value. There are three different types of 32-bit images
    storing RGB (i.e. 0xffRRGGBB), ARGB and premultiplied ARGB
    values respectively. In the premultiplied format the red, green,
    and blue channels are multiplied by the alpha component divided by
    255.

    An image's format can be retrieved using the format()
    function. Use the convertToFormat() functions to convert an image
    into another format. The allGray() and isGrayscale() functions
    tell whether a color image can safely be converted to a grayscale
    image.

    \section1 Image Transformations

    QImage supports a number of functions for creating a new image
    that is a transformed version of the original: The
    createAlphaMask() function builds and returns a 1-bpp mask from
    the alpha buffer in this image, and the createHeuristicMask()
    function creates and returns a 1-bpp heuristic mask for this
    image. The latter function works by selecting a color from one of
    the corners, then chipping away pixels of that color starting at
    all the edges.

    The mirrored() function returns a mirror of the image in the
    desired direction, the scaled() returns a copy of the image scaled
    to a rectangle of the desired measures, and the rgbSwapped() function
    constructs a BGR image from a RGB image.

    The scaledToWidth() and scaledToHeight() functions return scaled
    copies of the image.

    The transformed() function returns a copy of the image 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 image containing all
    transformed points of the original image. The static trueMatrix()
    function returns the actual matrix used for transforming the
    image.

    There are also functions for changing attributes of an image
    in-place:

    \table
    \header \li Function \li Description
    \row
    \li setDotsPerMeterX()
    \li Defines the aspect ratio by setting the number of pixels that fit
    horizontally in a physical meter.
    \row
    \li setDotsPerMeterY()
    \li Defines the aspect ratio by setting the number of pixels that fit
    vertically in a physical meter.
    \row
    \li fill()
    \li Fills the entire image with the given pixel value.
    \row
    \li invertPixels()
    \li Inverts all pixel values in the image using the given InvertMode value.
    \row
    \li setColorTable()
    \li Sets the color table used to translate color indexes. Only
    monochrome and 8-bit formats.
    \row
    \li setColorCount()
    \li Resizes the color table. Only monochrome and 8-bit formats.

    \endtable

    \sa QImageReader, QImageWriter, QPixmap, QSvgRenderer, {Image Composition Example},
        {Image Viewer Example}, {Scribble Example}, {Pixelator Example}
*/

/*!
    \fn QImage::QImage(QImage &&other)

    Move-constructs a QImage instance, making it point at the same
    object that \a other was pointing to.

    \since 5.2
*/

/*!
    \fn QImage &QImage::operator=(QImage &&other)

    Move-assigns \a other to this QImage instance.

    \since 5.2
*/

/*!
    \typedef QImageCleanupFunction
    \relates QImage
    \since 5.0

    A function with the following signature that can be used to
    implement basic image memory management:

    \code
    void myImageCleanupHandler(void *info);
    \endcode
*/

/*!
    \enum QImage::InvertMode

    This enum type is used to describe how pixel values should be
    inverted in the invertPixels() function.

    \value InvertRgb    Invert only the RGB values and leave the alpha
                        channel unchanged.

    \value InvertRgba   Invert all channels, including the alpha channel.

    \sa invertPixels()
*/

/*!
    \enum QImage::Format

    The following image formats are available in Qt. Values from Format_ARGB8565_Premultiplied
    to Format_ARGB4444_Premultiplied were added in Qt 4.4. Values Format_RGBX8888, Format_RGBA8888
    and Format_RGBA8888_Premultiplied were added in Qt 5.2. Values Format_BGR30, Format_A2BGR30_Premultiplied,
    Format_RGB30, Format_A2RGB30_Premultiplied were added in Qt 5.4. Format_Alpha8 and Format_Grayscale8
    were added in Qt 5.5.
    See the notes after the table.

    \value Format_Invalid   The image is invalid.
    \value Format_Mono      The image is stored using 1-bit per pixel. Bytes are
                            packed with the most significant bit (MSB) first.
    \value Format_MonoLSB   The image is stored using 1-bit per pixel. Bytes are
                            packed with the less significant bit (LSB) first.

    \value Format_Indexed8  The image is stored using 8-bit indexes
                            into a colormap.

    \value Format_RGB32     The image is stored using a 32-bit RGB format (0xffRRGGBB).

    \value Format_ARGB32    The image is stored using a 32-bit ARGB
                            format (0xAARRGGBB).

    \value Format_ARGB32_Premultiplied  The image is stored using a premultiplied 32-bit
                            ARGB format (0xAARRGGBB), i.e. the red,
                            green, and blue channels are multiplied
                            by the alpha component divided by 255. (If RR, GG, or BB
                            has a higher value than the alpha channel, the results are
                            undefined.) Certain operations (such as image composition
                            using alpha blending) are faster using premultiplied ARGB32
                            than with plain ARGB32.

    \value Format_RGB16     The image is stored using a 16-bit RGB format (5-6-5).

    \value Format_ARGB8565_Premultiplied  The image is stored using a
                            premultiplied 24-bit ARGB format (8-5-6-5).
    \value Format_RGB666    The image is stored using a 24-bit RGB format (6-6-6).
                            The unused most significant bits is always zero.
    \value Format_ARGB6666_Premultiplied  The image is stored using a
                            premultiplied 24-bit ARGB format (6-6-6-6).
    \value Format_RGB555    The image is stored using a 16-bit RGB format (5-5-5).
                            The unused most significant bit is always zero.
    \value Format_ARGB8555_Premultiplied  The image is stored using a
                            premultiplied 24-bit ARGB format (8-5-5-5).
    \value Format_RGB888    The image is stored using a 24-bit RGB format (8-8-8).
    \value Format_RGB444    The image is stored using a 16-bit RGB format (4-4-4).
                            The unused bits are always zero.
    \value Format_ARGB4444_Premultiplied  The image is stored using a
                            premultiplied 16-bit ARGB format (4-4-4-4).
    \value Format_RGBX8888   The image is stored using a 32-bit byte-ordered RGB(x) format (8-8-8-8).
                             This is the same as the Format_RGBA8888 except alpha must always be 255.
    \value Format_RGBA8888   The image is stored using a 32-bit byte-ordered RGBA format (8-8-8-8).
                             Unlike ARGB32 this is a byte-ordered format, which means the 32bit
                             encoding differs between big endian and little endian architectures,
                             being respectively (0xRRGGBBAA) and (0xAABBGGRR). The order of the colors
                             is the same on any architecture if read as bytes 0xRR,0xGG,0xBB,0xAA.
    \value Format_RGBA8888_Premultiplied    The image is stored using a
                            premultiplied 32-bit byte-ordered RGBA format (8-8-8-8).
    \value Format_BGR30      The image is stored using a 32-bit BGR format (x-10-10-10).
    \value Format_A2BGR30_Premultiplied    The image is stored using a 32-bit premultiplied ABGR format (2-10-10-10).
    \value Format_RGB30      The image is stored using a 32-bit RGB format (x-10-10-10).
    \value Format_A2RGB30_Premultiplied    The image is stored using a 32-bit premultiplied ARGB format (2-10-10-10).
    \value Format_Alpha8     The image is stored using an 8-bit alpha only format.
    \value Format_Grayscale8 The image is stored using an 8-bit grayscale format.

    \note Drawing into a QImage with QImage::Format_Indexed8 is not
    supported.

    \note Do not render into ARGB32 images using QPainter.  Using
    QImage::Format_ARGB32_Premultiplied is significantly faster.

    \note Formats with more than 8 bit per color channel will only be processed by the raster engine using 8 bit
    per color.

    \sa format(), convertToFormat()
*/

/*****************************************************************************
  QImage member functions
 *****************************************************************************/

/*!
    Constructs a null image.

    \sa isNull()
*/

QImage::QImage() Q_DECL_NOEXCEPT
    : QPaintDevice()
{
    d = 0;
}

/*!
    Constructs an image with the given \a width, \a height and \a
    format.

    A \l{isNull()}{null} image will be returned if memory cannot be allocated.

    \warning This will create a QImage with uninitialized data. Call
    fill() to fill the image with an appropriate pixel value before
    drawing onto it with QPainter.
*/
QImage::QImage(int width, int height, Format format)
    : QImage(QSize(width, height), format)
{
}

/*!
    Constructs an image with the given \a size and \a format.

    A \l{isNull()}{null} image is returned if memory cannot be allocated.

    \warning This will create a QImage with uninitialized data. Call
    fill() to fill the image with an appropriate pixel value before
    drawing onto it with QPainter.
*/
QImage::QImage(const QSize &size, Format format)
    : QPaintDevice()
{
    d = QImageData::create(size, format);
}



QImageData *QImageData::create(uchar *data, int width, int height,  int bpl, QImage::Format format, bool readOnly, QImageCleanupFunction cleanupFunction, void *cleanupInfo)
{
    QImageData *d = 0;

    if (format == QImage::Format_Invalid)
        return d;

    const int depth = qt_depthForFormat(format);
    const int calc_bytes_per_line = ((width * depth + 31)/32) * 4;
    const int min_bytes_per_line = (width * depth + 7)/8;

    if (bpl <= 0)
        bpl = calc_bytes_per_line;

    if (width <= 0 || height <= 0 || !data
        || INT_MAX/sizeof(uchar *) < uint(height)
        || INT_MAX/uint(depth) < uint(width)
        || bpl <= 0
        || bpl < min_bytes_per_line
        || INT_MAX/uint(bpl) < uint(height))
        return d;                                        // invalid parameter(s)

    d = new QImageData;
    d->ref.ref();

    d->own_data = false;
    d->ro_data = readOnly;
    d->data = data;
    d->width = width;
    d->height = height;
    d->depth = depth;
    d->format = format;

    d->bytes_per_line = bpl;
    d->nbytes = d->bytes_per_line * height;

    d->cleanupFunction = cleanupFunction;
    d->cleanupInfo = cleanupInfo;

    return d;
}

/*!
    Constructs an image with the given \a width, \a height and \a
    format, that uses an existing memory buffer, \a data. The \a width
    and \a height must be specified in pixels, \a data must be 32-bit aligned,
    and each scanline of data in the image must also be 32-bit aligned.

    The buffer must remain valid throughout the life of the QImage and
    all copies that have not been modified or otherwise detached from
    the original buffer. The image does not delete the buffer at destruction.
    You can provide a function pointer \a cleanupFunction along with an
    extra pointer \a cleanupInfo that will be called when the last copy
    is destroyed.

    If \a format is an indexed color format, the image color table is
    initially empty and must be sufficiently expanded with
    setColorCount() or setColorTable() before the image is used.
*/
QImage::QImage(uchar* data, int width, int height, Format format, QImageCleanupFunction cleanupFunction, void *cleanupInfo)
    : QPaintDevice()
{
    d = QImageData::create(data, width, height, 0, format, false, cleanupFunction, cleanupInfo);
}

/*!
    Constructs an image with the given \a width, \a height and \a
    format, that uses an existing read-only memory buffer, \a
    data. The \a width and \a height must be specified in pixels, \a
    data must be 32-bit aligned, and each scanline of data in the
    image must also be 32-bit aligned.

    The buffer must remain valid throughout the life of the QImage and
    all copies that have not been modified or otherwise detached from
    the original buffer. The image does not delete the buffer at destruction.
    You can provide a function pointer \a cleanupFunction along with an
    extra pointer \a cleanupInfo that will be called when the last copy
    is destroyed.

    If \a format is an indexed color format, the image color table is
    initially empty and must be sufficiently expanded with
    setColorCount() or setColorTable() before the image is used.

    Unlike the similar QImage constructor that takes a non-const data buffer,
    this version will never alter the contents of the buffer.  For example,
    calling QImage::bits() will return a deep copy of the image, rather than
    the buffer passed to the constructor.  This allows for the efficiency of
    constructing a QImage from raw data, without the possibility of the raw
    data being changed.
*/
QImage::QImage(const uchar* data, int width, int height, Format format, QImageCleanupFunction cleanupFunction, void *cleanupInfo)
    : QPaintDevice()
{
    d = QImageData::create(const_cast<uchar*>(data), width, height, 0, format, true, cleanupFunction, cleanupInfo);
}

/*!
    Constructs an image with the given \a width, \a height and \a
    format, that uses an existing memory buffer, \a data. The \a width
    and \a height must be specified in pixels. \a bytesPerLine
    specifies the number of bytes per line (stride).

    The buffer must remain valid throughout the life of the QImage and
    all copies that have not been modified or otherwise detached from
    the original buffer. The image does not delete the buffer at destruction.
    You can provide a function pointer \a cleanupFunction along with an
    extra pointer \a cleanupInfo that will be called when the last copy
    is destroyed.

    If \a format is an indexed color format, the image color table is
    initially empty and must be sufficiently expanded with
    setColorCount() or setColorTable() before the image is used.
*/
QImage::QImage(uchar *data, int width, int height, int bytesPerLine, Format format, QImageCleanupFunction cleanupFunction, void *cleanupInfo)
    :QPaintDevice()
{
    d = QImageData::create(data, width, height, bytesPerLine, format, false, cleanupFunction, cleanupInfo);
}


/*!
    Constructs an image with the given \a width, \a height and \a
    format, that uses an existing memory buffer, \a data. The \a width
    and \a height must be specified in pixels. \a bytesPerLine
    specifies the number of bytes per line (stride).

    The buffer must remain valid throughout the life of the QImage and
    all copies that have not been modified or otherwise detached from
    the original buffer. The image does not delete the buffer at destruction.
    You can provide a function pointer \a cleanupFunction along with an
    extra pointer \a cleanupInfo that will be called when the last copy
    is destroyed.

    If \a format is an indexed color format, the image color table is
    initially empty and must be sufficiently expanded with
    setColorCount() or setColorTable() before the image is used.

    Unlike the similar QImage constructor that takes a non-const data buffer,
    this version will never alter the contents of the buffer.  For example,
    calling QImage::bits() will return a deep copy of the image, rather than
    the buffer passed to the constructor.  This allows for the efficiency of
    constructing a QImage from raw data, without the possibility of the raw
    data being changed.
*/

QImage::QImage(const uchar *data, int width, int height, int bytesPerLine, Format format, QImageCleanupFunction cleanupFunction, void *cleanupInfo)
    :QPaintDevice()
{
    d = QImageData::create(const_cast<uchar*>(data), width, height, bytesPerLine, format, true, cleanupFunction, cleanupInfo);
}

/*!
    Constructs an image and tries to load the image from the file with
    the given \a fileName.

    The loader attempts to read the image using the specified \a
    format. If the \a format is not specified (which is the default),
    it is auto-detected based on the file's suffix and header. For
    details, see {QImageReader::setAutoDetectImageFormat()}{QImageReader}.

    If the loading of the image failed, this object is a null image.

    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.

    \sa isNull(), {QImage#Reading and Writing Image Files}{Reading and Writing Image Files}
*/

QImage::QImage(const QString &fileName, const char *format)
    : QPaintDevice()
{
    d = 0;
    load(fileName, format);
}

#ifndef QT_NO_IMAGEFORMAT_XPM
extern bool qt_read_xpm_image_or_array(QIODevice *device, const char * const *source, QImage &image);

/*!
    Constructs an image from the given \a xpm image.

    Make sure that the image is 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 code/src_gui_image_qimage.cpp 2

    The extra \c const makes the entire definition read-only, which is
    slightly more efficient (e.g., when the code is in a shared
    library) and able to be stored in ROM with the application.
*/

QImage::QImage(const char * const xpm[])
    : QPaintDevice()
{
    d = 0;
    if (!xpm)
        return;
    if (!qt_read_xpm_image_or_array(0, xpm, *this))
        // Issue: Warning because the constructor may be ambigious
        qWarning("QImage::QImage(), XPM is not supported");
}
#endif // QT_NO_IMAGEFORMAT_XPM

/*!
    Constructs a shallow copy of the given \a image.

    For more information about shallow copies, see the \l {Implicit
    Data Sharing} documentation.

    \sa copy()
*/

QImage::QImage(const QImage &image)
    : QPaintDevice()
{
    if (image.paintingActive() || isLocked(image.d)) {
        d = 0;
        image.copy().swap(*this);
    } else {
        d = image.d;
        if (d)
            d->ref.ref();
    }
}

/*!
    Destroys the image and cleans up.
*/

QImage::~QImage()
{
    if (d && !d->ref.deref())
        delete d;
}

/*!
    Assigns a shallow copy of the given \a image to this image and
    returns a reference to this image.

    For more information about shallow copies, see the \l {Implicit
    Data Sharing} documentation.

    \sa copy(), QImage()
*/

QImage &QImage::operator=(const QImage &image)
{
    if (image.paintingActive() || isLocked(image.d)) {
        operator=(image.copy());
    } else {
        if (image.d)
            image.d->ref.ref();
        if (d && !d->ref.deref())
            delete d;
        d = image.d;
    }
    return *this;
}

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

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

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

/*!
   Returns the image as a QVariant.
*/
QImage::operator QVariant() const
{
    return QVariant(QVariant::Image, this);
}

/*!
    \internal

    If multiple images share common data, this image makes a copy of
    the data and detaches itself from the sharing mechanism, making
    sure that this image is the only one referring to the data.

    Nothing is done if there is just a single reference.

    \sa copy(), {QImage::isDetached()}{isDetached()}, {Implicit Data Sharing}
*/
void QImage::detach()
{
    if (d) {
        if (d->is_cached && d->ref.load() == 1)
            QImagePixmapCleanupHooks::executeImageHooks(cacheKey());

        if (d->ref.load() != 1 || d->ro_data)
            *this = copy();

        if (d)
            ++d->detach_no;
    }
}


static void copyMetadata(QImageData *dst, const QImageData *src)
{
    // Doesn't copy colortable and alpha_clut, or offset.
    dst->dpmx = src->dpmx;
    dst->dpmy = src->dpmy;
    dst->devicePixelRatio = src->devicePixelRatio;
    dst->text = src->text;
}

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

    The returned image is copied from the position (\a x, \a y) in
    this image, and will always have the given \a width and \a height.
    In areas beyond this image, pixels are set to 0.

*/

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

    Returns a sub-area of the image as a new image.

    The returned image is copied from the position (\a
    {rectangle}.x(), \a{rectangle}.y()) in this image, and will always
    have the size of the given \a rectangle.

    In areas beyond this image, pixels are set to 0. For 32-bit RGB
    images, this means black; for 32-bit ARGB images, this means
    transparent black; for 8-bit images, this means the color with
    index 0 in the color table which can be anything; for 1-bit
    images, this means Qt::color0.

    If the given \a rectangle is a null rectangle the entire image is
    copied.

    \sa QImage()
*/
QImage QImage::copy(const QRect& r) const
{
    if (!d)
        return QImage();

    if (r.isNull()) {
        QImage image(d->width, d->height, d->format);
        if (image.isNull())
            return image;

        // Qt for Embedded Linux can create images with non-default bpl
        // make sure we don't crash.
        if (image.d->nbytes != d->nbytes) {
            int bpl = qMin(bytesPerLine(), image.bytesPerLine());
            for (int i = 0; i < height(); i++)
                memcpy(image.scanLine(i), scanLine(i), bpl);
        } else
            memcpy(image.bits(), bits(), d->nbytes);
        image.d->colortable = d->colortable;
        image.d->offset = d->offset;
        image.d->has_alpha_clut = d->has_alpha_clut;
        copyMetadata(image.d, d);
        return image;
    }

    int x = r.x();
    int y = r.y();
    int w = r.width();
    int h = r.height();

    int dx = 0;
    int dy = 0;
    if (w <= 0 || h <= 0)
        return QImage();

    QImage image(w, h, d->format);
    if (image.isNull())
        return image;

    if (x < 0 || y < 0 || x + w > d->width || y + h > d->height) {
        // bitBlt will not cover entire image - clear it.
        image.fill(0);
        if (x < 0) {
            dx = -x;
            x = 0;
        }
        if (y < 0) {
            dy = -y;
            y = 0;
        }
    }

    image.d->colortable = d->colortable;

    int pixels_to_copy = qMax(w - dx, 0);
    if (x > d->width)
        pixels_to_copy = 0;
    else if (pixels_to_copy > d->width - x)
        pixels_to_copy = d->width - x;
    int lines_to_copy = qMax(h - dy, 0);
    if (y > d->height)
        lines_to_copy = 0;
    else if (lines_to_copy > d->height - y)
        lines_to_copy = d->height - y;

    bool byteAligned = true;
    if (d->format == Format_Mono || d->format == Format_MonoLSB)
        byteAligned = !(dx & 7) && !(x & 7) && !(pixels_to_copy & 7);

    if (byteAligned) {
        const uchar *src = d->data + ((x * d->depth) >> 3) + y * d->bytes_per_line;
        uchar *dest = image.d->data + ((dx * d->depth) >> 3) + dy * image.d->bytes_per_line;
        const int bytes_to_copy = (pixels_to_copy * d->depth) >> 3;
        for (int i = 0; i < lines_to_copy; ++i) {
            memcpy(dest, src, bytes_to_copy);
            src += d->bytes_per_line;
            dest += image.d->bytes_per_line;
        }
    } else if (d->format == Format_Mono) {
        const uchar *src = d->data + y * d->bytes_per_line;
        uchar *dest = image.d->data + dy * image.d->bytes_per_line;
        for (int i = 0; i < lines_to_copy; ++i) {
            for (int j = 0; j < pixels_to_copy; ++j) {
                if (src[(x + j) >> 3] & (0x80 >> ((x + j) & 7)))
                    dest[(dx + j) >> 3] |= (0x80 >> ((dx + j) & 7));
                else
                    dest[(dx + j) >> 3] &= ~(0x80 >> ((dx + j) & 7));
            }
            src += d->bytes_per_line;
            dest += image.d->bytes_per_line;
        }
    } else { // Format_MonoLSB
        Q_ASSERT(d->format == Format_MonoLSB);
        const uchar *src = d->data + y * d->bytes_per_line;
        uchar *dest = image.d->data + dy * image.d->bytes_per_line;
        for (int i = 0; i < lines_to_copy; ++i) {
            for (int j = 0; j < pixels_to_copy; ++j) {
                if (src[(x + j) >> 3] & (0x1 << ((x + j) & 7)))
                    dest[(dx + j) >> 3] |= (0x1 << ((dx + j) & 7));
                else
                    dest[(dx + j) >> 3] &= ~(0x1 << ((dx + j) & 7));
            }
            src += d->bytes_per_line;
            dest += image.d->bytes_per_line;
        }
    }

    copyMetadata(image.d, d);
    image.d->offset = offset();
    image.d->has_alpha_clut = d->has_alpha_clut;
    return image;
}


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

    Returns \c true if it is a null image, otherwise returns \c false.

    A null image has all parameters set to zero and no allocated data.
*/
bool QImage::isNull() const
{
    return !d;
}

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

    Returns the width of the image.

    \sa {QImage#Image Information}{Image Information}
*/
int QImage::width() const
{
    return d ? d->width : 0;
}

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

    Returns the height of the image.

    \sa {QImage#Image Information}{Image Information}
*/
int QImage::height() const
{
    return d ? d->height : 0;
}

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

    Returns the size of the image, i.e. its width() and height().

    \sa {QImage#Image Information}{Image Information}
*/
QSize QImage::size() const
{
    return d ? QSize(d->width, d->height) : QSize(0, 0);
}

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

    Returns the enclosing rectangle (0, 0, width(), height()) of the
    image.

    \sa {QImage#Image Information}{Image Information}
*/
QRect QImage::rect() const
{
    return d ? QRect(0, 0, d->width, d->height) : QRect();
}

/*!
    Returns the depth of the image.

    The image depth is the number of bits used to store a single
    pixel, also called bits per pixel (bpp).

    The supported depths are 1, 8, 16, 24 and 32.

    \sa bitPlaneCount(), convertToFormat(), {QImage#Image Formats}{Image Formats},
    {QImage#Image Information}{Image Information}

*/
int QImage::depth() const
{
    return d ? d->depth : 0;
}

/*!
    \obsolete
    \fn int QImage::numColors() const

    Returns the size of the color table for the image.

    \sa setColorCount()
*/

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

    Returns the size of the color table for the image.

    Notice that colorCount() returns 0 for 32-bpp images because these
    images do not use color tables, but instead encode pixel values as
    ARGB quadruplets.

    \sa setColorCount(), {QImage#Image Information}{Image Information}
*/
int QImage::colorCount() const
{
    return d ? d->colortable.size() : 0;
}

/*!
    Sets the color table used to translate color indexes to QRgb
    values, to the specified \a colors.

    When the image is used, the color table must be large enough to
    have entries for all the pixel/index values present in the image,
    otherwise the results are undefined.

    \sa colorTable(), setColor(), {QImage#Image Transformations}{Image
    Transformations}
*/
#if QT_VERSION >= QT_VERSION_CHECK(6,0,0)
void QImage::setColorTable(const QVector<QRgb> &colors)
#else
void QImage::setColorTable(const QVector<QRgb> colors)
#endif
{
    if (!d)
        return;
    detach();

    // In case detach() ran out of memory
    if (!d)
        return;

#if QT_VERSION >= QT_VERSION_CHECK(6,0,0)
    d->colortable = colors;
#else
    d->colortable = qMove(const_cast<QVector<QRgb>&>(colors));
#endif
    d->has_alpha_clut = false;
    for (int i = 0; i < d->colortable.size(); ++i) {
        if (qAlpha(d->colortable.at(i)) != 255) {
            d->has_alpha_clut = true;
            break;
        }
    }
}

/*!
    Returns a list of the colors contained in the image's color table,
    or an empty list if the image does not have a color table

    \sa setColorTable(), colorCount(), color()
*/
QVector<QRgb> QImage::colorTable() const
{
    return d ? d->colortable : QVector<QRgb>();
}

/*!
    Returns the device pixel ratio for the image. This is the
    ratio between \e{device pixels} and \e{device independent pixels}.

    Use this function when calculating layout geometry based on
    the image size: QSize layoutSize = image.size() / image.devicePixelRatio()

    The default value is 1.0.

    \sa setDevicePixelRatio(), QImageReader
*/
qreal QImage::devicePixelRatio() const
{
    if (!d)
        return 1.0;
    return d->devicePixelRatio;
}

/*!
    Sets the device pixel ratio for the image. This is the
    ratio between image pixels and device-independent pixels.

    The default \a scaleFactor is 1.0. Setting it to something else has
    two effects:

    QPainters that are opened on the image will be scaled. For
    example, painting on a 200x200 image if with a ratio of 2.0
    will result in effective (device-independent) painting bounds
    of 100x100.

    Code paths in Qt that calculate layout geometry based on the
    image size will take the ratio into account:
    QSize layoutSize = image.size() / image.devicePixelRatio()
    The net effect of this is that the image is displayed as
    high-DPI image rather than a large image
    (see \l{Drawing High Resolution Versions of Pixmaps and Images}).

    \sa devicePixelRatio()
*/
void QImage::setDevicePixelRatio(qreal scaleFactor)
{
    if (!d)
        return;

    if (scaleFactor == d->devicePixelRatio)
        return;

    detach();
    d->devicePixelRatio = scaleFactor;
}

/*!
    \since 4.6
    \obsolete
    Returns the number of bytes occupied by the image data.

    Note this method should never be called on an image larger than 2 gigabytes.
    Instead use sizeInBytes().

    \sa sizeInBytes(), bytesPerLine(), bits(), {QImage#Image Information}{Image
    Information}
*/
int QImage::byteCount() const
{
    Q_ASSERT(!d || d->nbytes < std::numeric_limits<int>::max());
    return d ? int(d->nbytes) : 0;
}

/*!
    \since 5.10
    Returns the image data size in bytes.

    \sa byteCount(), bytesPerLine(), bits(), {QImage#Image Information}{Image
    Information}
*/
qsizetype QImage::sizeInBytes() const
{
    return d ? d->nbytes : 0;
}

/*!
    Returns the number of bytes per image scanline.

    This is equivalent to sizeInBytes() / height() if height() is non-zero.

    \sa scanLine()
*/
int QImage::bytesPerLine() const
{
    return d ? d->bytes_per_line : 0;
}


/*!
    Returns the color in the color table at index \a i. The first
    color is at index 0.

    The colors in an image's color table are specified as ARGB
    quadruplets (QRgb). Use the qAlpha(), qRed(), qGreen(), and
    qBlue() functions to get the color value components.

    \sa setColor(), pixelIndex(), {QImage#Pixel Manipulation}{Pixel
    Manipulation}
*/
QRgb QImage::color(int i) const
{
    Q_ASSERT(i < colorCount());
    return d ? d->colortable.at(i) : QRgb(uint(-1));
}

/*!
    \fn void QImage::setColor(int index, QRgb colorValue)

    Sets the color at the given \a index in the color table, to the
    given to \a colorValue. The color value is an ARGB quadruplet.

    If \a index is outside the current size of the color table, it is
    expanded with setColorCount().

    \sa color(), colorCount(), setColorTable(), {QImage#Pixel Manipulation}{Pixel
    Manipulation}
*/
void QImage::setColor(int i, QRgb c)
{
    if (!d)
        return;
    if (i < 0 || d->depth > 8 || i >= 1<<d->depth) {
        qWarning("QImage::setColor: Index out of bound %d", i);
        return;
    }
    detach();

    // In case detach() run out of memory
    if (!d)
        return;

    if (i >= d->colortable.size())
        setColorCount(i+1);
    d->colortable[i] = c;
    d->has_alpha_clut |= (qAlpha(c) != 255);
}

/*!
    Returns a pointer to the pixel data at the scanline with index \a
    i. The first scanline is at index 0.

    The scanline data is aligned on a 32-bit boundary.

    \warning If you are accessing 32-bpp image data, cast the returned
    pointer to \c{QRgb*} (QRgb has a 32-bit size) and use it to
    read/write the pixel value. You cannot use the \c{uchar*} pointer
    directly, because the pixel format depends on the byte order on
    the underlying platform. Use qRed(), qGreen(), qBlue(), and
    qAlpha() to access the pixels.

    \sa bytesPerLine(), bits(), {QImage#Pixel Manipulation}{Pixel
    Manipulation}, constScanLine()
*/
uchar *QImage::scanLine(int i)
{
    if (!d)
        return 0;

    detach();

    // In case detach() ran out of memory
    if (!d)
        return 0;

    return d->data + i * d->bytes_per_line;
}

/*!
    \overload
*/
const uchar *QImage::scanLine(int i) const
{
    if (!d)
        return 0;

    Q_ASSERT(i >= 0 && i < height());
    return d->data + i * d->bytes_per_line;
}


/*!
    Returns a pointer to the pixel data at the scanline with index \a
    i. The first scanline is at index 0.

    The scanline data is aligned on a 32-bit boundary.

    Note that QImage uses \l{Implicit Data Sharing} {implicit data
    sharing}, but this function does \e not perform a deep copy of the
    shared pixel data, because the returned data is const.

    \sa scanLine(), constBits()
    \since 4.7
*/
const uchar *QImage::constScanLine(int i) const
{
    if (!d)
        return 0;

    Q_ASSERT(i >= 0 && i < height());
    return d->data + i * d->bytes_per_line;
}

/*!
    Returns a pointer to the first pixel data. This is equivalent to
    scanLine(0).

    Note that QImage uses \l{Implicit Data Sharing} {implicit data
    sharing}. This function performs a deep copy of the shared pixel
    data, thus ensuring that this QImage is the only one using the
    current return value.

    \sa scanLine(), sizeInBytes(), constBits()
*/
uchar *QImage::bits()
{
    if (!d)
        return 0;
    detach();

    // In case detach ran out of memory...
    if (!d)
        return 0;

    return d->data;
}

/*!
    \overload

    Note that QImage uses \l{Implicit Data Sharing} {implicit data
    sharing}, but this function does \e not perform a deep copy of the
    shared pixel data, because the returned data is const.
*/
const uchar *QImage::bits() const
{
    return d ? d->data : 0;
}


/*!
    Returns a pointer to the first pixel data.

    Note that QImage uses \l{Implicit Data Sharing} {implicit data
    sharing}, but this function does \e not perform a deep copy of the
    shared pixel data, because the returned data is const.

    \sa bits(), constScanLine()
    \since 4.7
*/
const uchar *QImage::constBits() const
{
    return d ? d->data : 0;
}

/*!
    \fn void QImage::fill(uint pixelValue)

    Fills the entire image with the given \a pixelValue.

    If the depth of this image is 1, only the lowest bit is used. If
    you say fill(0), fill(2), etc., the image is filled with 0s. If
    you say fill(1), fill(3), etc., the image is filled with 1s. If
    the depth is 8, the lowest 8 bits are used and if the depth is 16
    the lowest 16 bits are used.

    Note: QImage::pixel() returns the color of the pixel at the given
    coordinates while QColor::pixel() returns the pixel value of the
    underlying window system (essentially an index value), so normally
    you will want to use QImage::pixel() to use a color from an
    existing image or QColor::rgb() to use a specific color.

    \sa depth(), {QImage#Image Transformations}{Image Transformations}
*/

void QImage::fill(uint pixel)
{
    if (!d)
        return;

    detach();

    // In case detach() ran out of memory
    if (!d)
        return;

    if (d->depth == 1 || d->depth == 8) {
        int w = d->width;
        if (d->depth == 1) {
            if (pixel & 1)
                pixel = 0xffffffff;
            else
                pixel = 0;
            w = (w + 7) / 8;
        } else {
            pixel &= 0xff;
        }
        qt_rectfill<quint8>(d->data, pixel, 0, 0,
                            w, d->height, d->bytes_per_line);
        return;
    } else if (d->depth == 16) {
        qt_rectfill<quint16>(reinterpret_cast<quint16*>(d->data), pixel,
                             0, 0, d->width, d->height, d->bytes_per_line);
        return;
    } else if (d->depth == 24) {
        qt_rectfill<quint24>(reinterpret_cast<quint24*>(d->data), pixel,
                             0, 0, d->width, d->height, d->bytes_per_line);
        return;
    }

    if (d->format == Format_RGB32)
        pixel |= 0xff000000;
    if (d->format == Format_RGBX8888)
#if Q_BYTE_ORDER == Q_LITTLE_ENDIAN
        pixel |= 0xff000000;
#else
        pixel |= 0x000000ff;
#endif
    if (d->format == Format_BGR30 || d->format == Format_RGB30)
        pixel |= 0xc0000000;

    qt_rectfill<uint>(reinterpret_cast<uint*>(d->data), pixel,
                      0, 0, d->width, d->height, d->bytes_per_line);
}


/*!
    \fn void QImage::fill(Qt::GlobalColor color)
    \overload
    \since 4.8

    Fills the image with the given \a color, described as a standard global
    color.
 */

void QImage::fill(Qt::GlobalColor color)
{
    fill(QColor(color));
}



/*!
    \fn void QImage::fill(const QColor &color)

    \overload

    Fills the entire image with the given \a color.

    If the depth of the image is 1, the image will be filled with 1 if
    \a color equals Qt::color1; it will otherwise be filled with 0.

    If the depth of the image is 8, the image will be filled with the
    index corresponding the \a color in the color table if present; it
    will otherwise be filled with 0.

    \since 4.8
*/

void QImage::fill(const QColor &color)
{
    if (!d)
        return;
    detach();

    // In case we run out of memory
    if (!d)
        return;

    switch (d->format) {
    case QImage::Format_RGB32:
    case QImage::Format_ARGB32:
        fill(color.rgba());
        break;
    case QImage::Format_ARGB32_Premultiplied:
        fill(qPremultiply(color.rgba()));
        break;
    case QImage::Format_RGBX8888:
        fill(ARGB2RGBA(color.rgba() | 0xff000000));
        break;
    case QImage::Format_RGBA8888:
        fill(ARGB2RGBA(color.rgba()));
        break;
    case QImage::Format_RGBA8888_Premultiplied:
        fill(ARGB2RGBA(qPremultiply(color.rgba())));
        break;
    case QImage::Format_BGR30:
    case QImage::Format_A2BGR30_Premultiplied:
        fill(qConvertRgb64ToRgb30<PixelOrderBGR>(color.rgba64()));
        break;
    case QImage::Format_RGB30:
    case QImage::Format_A2RGB30_Premultiplied:
        fill(qConvertRgb64ToRgb30<PixelOrderRGB>(color.rgba64()));
        break;
    case QImage::Format_RGB16:
        fill((uint) qConvertRgb32To16(color.rgba()));
        break;
    case QImage::Format_Indexed8: {
        uint pixel = 0;
        for (int i=0; i<d->colortable.size(); ++i) {
            if (color.rgba() == d->colortable.at(i)) {
                pixel = i;
                break;
            }
        }
        fill(pixel);
        break;
    }
    case QImage::Format_Mono:
    case QImage::Format_MonoLSB:
        if (color == Qt::color1)
            fill((uint) 1);
        else
            fill((uint) 0);
        break;
    default: {
        QPainter p(this);
        p.setCompositionMode(QPainter::CompositionMode_Source);
        p.fillRect(rect(), color);
    }}
}



/*!
    Inverts all pixel values in the image.

    The given invert \a mode only have a meaning when the image's
    depth is 32. The default \a mode is InvertRgb, which leaves the
    alpha channel unchanged. If the \a mode is InvertRgba, the alpha
    bits are also inverted.

    Inverting an 8-bit image means to replace all pixels using color
    index \e i with a pixel using color index 255 minus \e i. The same
    is the case for a 1-bit image. Note that the color table is \e not
    changed.

    If the image has a premultiplied alpha channel, the image is first
    converted to ARGB32 to be inverted and then converted back.

    \sa {QImage#Image Transformations}{Image Transformations}
*/

void QImage::invertPixels(InvertMode mode)
{
    if (!d)
        return;

    detach();

    // In case detach() ran out of memory
    if (!d)
        return;

    QImage::Format originalFormat = d->format;
    // Inverting premultiplied pixels would produce invalid image data.
    if (hasAlphaChannel() && qPixelLayouts[d->format].premultiplied) {
        if (!d->convertInPlace(QImage::Format_ARGB32, 0))
            *this = convertToFormat(QImage::Format_ARGB32);
    }

    if (depth() < 32) {
        // This assumes no alpha-channel as the only formats with non-premultipled alpha are 32bit.
        int bpl = (d->width * d->depth + 7) / 8;
        int pad = d->bytes_per_line - bpl;
        uchar *sl = d->data;
        for (int y=0; y<d->height; ++y) {
            for (int x=0; x<bpl; ++x)
                *sl++ ^= 0xff;
            sl += pad;
        }
    } else {
        quint32 *p = (quint32*)d->data;
        quint32 *end = (quint32*)(d->data + d->nbytes);
        quint32 xorbits = 0xffffffff;
        switch (d->format) {
        case QImage::Format_RGBA8888:
            if (mode == InvertRgba)
                break;
            Q_FALLTHROUGH();
        case QImage::Format_RGBX8888:
#if Q_BYTE_ORDER == Q_BIG_ENDIAN
            xorbits = 0xffffff00;
            break;
#else
            xorbits = 0x00ffffff;
            break;
#endif
        case QImage::Format_ARGB32:
            if (mode == InvertRgba)
                break;
            Q_FALLTHROUGH();
        case QImage::Format_RGB32:
            xorbits = 0x00ffffff;
            break;
        case QImage::Format_BGR30:
        case QImage::Format_RGB30:
            xorbits = 0x3fffffff;
            break;
        default:
            Q_UNREACHABLE();
            xorbits = 0;
            break;
        }
        while (p < end)
            *p++ ^= xorbits;
    }

    if (originalFormat != d->format) {
        if (!d->convertInPlace(originalFormat, 0))
            *this = convertToFormat(originalFormat);
    }
}

// Windows defines these
#if defined(write)
# undef write
#endif
#if defined(close)
# undef close
#endif
#if defined(read)
# undef read
#endif

/*!
    \since 4.6
    Resizes the color table to contain \a colorCount entries.

    If the color table is expanded, all the extra colors will be set to
    transparent (i.e qRgba(0, 0, 0, 0)).

    When the image is used, the color table must be large enough to
    have entries for all the pixel/index values present in the image,
    otherwise the results are undefined.

    \sa colorCount(), colorTable(), setColor(), {QImage#Image
    Transformations}{Image Transformations}
*/

void QImage::setColorCount(int colorCount)
{
    if (!d) {
        qWarning("QImage::setColorCount: null image");
        return;
    }

    detach();

    // In case detach() ran out of memory
    if (!d)
        return;

    if (colorCount == d->colortable.size())
        return;
    if (colorCount <= 0) {                        // use no color table
        d->colortable = QVector<QRgb>();
        return;
    }
    int nc = d->colortable.size();
    d->colortable.resize(colorCount);
    for (int i = nc; i < colorCount; ++i)
        d->colortable[i] = 0;
}

/*!
    Returns the format of the image.

    \sa {QImage#Image Formats}{Image Formats}
*/
QImage::Format QImage::format() const
{
    return d ? d->format : Format_Invalid;
}

/*!
    \fn QImage QImage::convertToFormat(Format format, Qt::ImageConversionFlags flags) const

    Returns a copy of the image in the given \a format.

    The specified image conversion \a flags control how the image data
    is handled during the conversion process.

    \sa {Image Formats}
*/

/*!
    \internal
*/
QImage QImage::convertToFormat_helper(Format format, Qt::ImageConversionFlags flags) const
{
    if (!d || d->format == format)
        return *this;

    if (format == Format_Invalid || d->format == Format_Invalid)
        return QImage();

    Image_Converter converter = qimage_converter_map[d->format][format];
    if (!converter && format > QImage::Format_Indexed8 && d->format > QImage::Format_Indexed8)
        converter = convert_generic;
    if (converter) {
        QImage image(d->width, d->height, format);

        QIMAGE_SANITYCHECK_MEMORY(image);

        image.d->offset = offset();
        copyMetadata(image.d, d);

        converter(image.d, d, flags);
        return image;
    }

    // Convert indexed formats over ARGB32 or RGB32 to the final format.
    Q_ASSERT(format != QImage::Format_ARGB32 && format != QImage::Format_RGB32);
    Q_ASSERT(d->format != QImage::Format_ARGB32 && d->format != QImage::Format_RGB32);

    if (!hasAlphaChannel())
        return convertToFormat(Format_RGB32, flags).convertToFormat(format, flags);

    return convertToFormat(Format_ARGB32, flags).convertToFormat(format, flags);
}

/*!
    \internal
*/
bool QImage::convertToFormat_inplace(Format format, Qt::ImageConversionFlags flags)
{
    return d && d->convertInPlace(format, flags);
}

static inline int pixel_distance(QRgb p1, QRgb p2) {
    int r1 = qRed(p1);
    int g1 = qGreen(p1);
    int b1 = qBlue(p1);
    int a1 = qAlpha(p1);

    int r2 = qRed(p2);
    int g2 = qGreen(p2);
    int b2 = qBlue(p2);
    int a2 = qAlpha(p2);

    return abs(r1 - r2) + abs(g1 - g2) + abs(b1 - b2) + abs(a1 - a2);
}

static inline int closestMatch(QRgb pixel, const QVector<QRgb> &clut) {
    int idx = 0;
    int current_distance = INT_MAX;
    for (int i=0; i<clut.size(); ++i) {
        int dist = pixel_distance(pixel, clut.at(i));
        if (dist < current_distance) {
            current_distance = dist;
            idx = i;
        }
    }
    return idx;
}

static QImage convertWithPalette(const QImage &src, QImage::Format format,
                                 const QVector<QRgb> &clut) {
    QImage dest(src.size(), format);
    dest.setColorTable(clut);

    QString textsKeys = src.text();
    const auto textKeyList = textsKeys.splitRef(QLatin1Char('\n'), QString::SkipEmptyParts);
    for (const auto &textKey : textKeyList) {
        const auto textKeySplitted = textKey.split(QLatin1String(": "));
        dest.setText(textKeySplitted[0].toString(), textKeySplitted[1].toString());
    }

    int h = src.height();
    int w = src.width();

    QHash<QRgb, int> cache;

    if (format == QImage::Format_Indexed8) {
        for (int y=0; y<h; ++y) {
            const QRgb *src_pixels = (const QRgb *) src.scanLine(y);
            uchar *dest_pixels = (uchar *) dest.scanLine(y);
            for (int x=0; x<w; ++x) {
                int src_pixel = src_pixels[x];
                int value = cache.value(src_pixel, -1);
                if (value == -1) {
                    value = closestMatch(src_pixel, clut);
                    cache.insert(src_pixel, value);
                }
                dest_pixels[x] = (uchar) value;
            }
        }
    } else {
        QVector<QRgb> table = clut;
        table.resize(2);
        for (int y=0; y<h; ++y) {
            const QRgb *src_pixels = (const QRgb *) src.scanLine(y);
            for (int x=0; x<w; ++x) {
                int src_pixel = src_pixels[x];
                int value = cache.value(src_pixel, -1);
                if (value == -1) {
                    value = closestMatch(src_pixel, table);
                    cache.insert(src_pixel, value);
                }
                dest.setPixel(x, y, value);
            }
        }
    }

    return dest;
}

/*!
    \overload

    Returns a copy of the image converted to the given \a format,
    using the specified \a colorTable.

    Conversion from RGB formats to indexed formats is a slow operation
    and will use a straightforward nearest color approach, with no
    dithering.
*/
QImage QImage::convertToFormat(Format format, const QVector<QRgb> &colorTable, Qt::ImageConversionFlags flags) const
{
    if (!d || d->format == format)
        return *this;

    if (format == QImage::Format_Invalid)
        return QImage();
    if (format <= QImage::Format_Indexed8)
        return convertWithPalette(convertToFormat(QImage::Format_ARGB32, flags), format, colorTable);

    return convertToFormat(format, flags);
}

/*!
    \since 5.9

    Changes the \a format of the image without changing the data. Only
    works between formats of the same depth.

    Returns \c true if successful.

    This function can be used to change images with alpha-channels to
    their corresponding opaque formats if the data is known to be opaque-only,
    or to change the format of a given image buffer before overwriting
    it with new data.

    \warning The function does not check if the image data is valid in the
    new format and will still return \c true if the depths are compatible.
    Operations on an image with invalid data are undefined.

    \warning If the image is not detached, this will cause the data to be
    copied.

    \sa hasAlphaChannel(), convertToFormat()
*/

bool QImage::reinterpretAsFormat(Format format)
{
    if (!d)
        return false;
    if (d->format == format)
        return true;
    if (qt_depthForFormat(format) != qt_depthForFormat(d->format))
        return false;
    if (!isDetached()) // Detach only if shared, not for read-only data.
        detach();

    d->format = format;
    return true;
}

/*!
    \fn bool QImage::valid(const QPoint &pos) const

    Returns \c true if \a pos is a valid coordinate pair within the
    image; otherwise returns \c false.

    \sa rect(), QRect::contains()
*/

/*!
    \overload

    Returns \c true if QPoint(\a x, \a y) is a valid coordinate pair
    within the image; otherwise returns \c false.
*/
bool QImage::valid(int x, int y) const
{
    return d
        && x >= 0 && x < d->width
        && y >= 0 && y < d->height;
}

/*!
    \fn int QImage::pixelIndex(const QPoint &position) const

    Returns the pixel index at the given \a position.

    If \a position is not valid, or if the image is not a paletted
    image (depth() > 8), the results are undefined.

    \sa valid(), depth(), {QImage#Pixel Manipulation}{Pixel Manipulation}
*/

/*!
    \overload

    Returns the pixel index at (\a x, \a y).
*/
int QImage::pixelIndex(int x, int y) const
{
    if (!d || x < 0 || x >= d->width || y < 0 || y >= height()) {
        qWarning("QImage::pixelIndex: coordinate (%d,%d) out of range", x, y);
        return -12345;
    }
    const uchar * s = scanLine(y);
    switch(d->format) {
    case Format_Mono:
        return (*(s + (x >> 3)) >> (7- (x & 7))) & 1;
    case Format_MonoLSB:
        return (*(s + (x >> 3)) >> (x & 7)) & 1;
    case Format_Indexed8:
        return (int)s[x];
    default:
        qWarning("QImage::pixelIndex: Not applicable for %d-bpp images (no palette)", d->depth);
    }
    return 0;
}


/*!
    \fn QRgb QImage::pixel(const QPoint &position) const

    Returns the color of the pixel at the given \a position.

    If the \a position is not valid, the results are undefined.

    \warning This function is expensive when used for massive pixel
    manipulations. Use constBits() or constScanLine() when many
    pixels needs to be read.

    \sa setPixel(), valid(), constBits(), constScanLine(), {QImage#Pixel Manipulation}{Pixel
    Manipulation}
*/

/*!
    \overload

    Returns the color of the pixel at coordinates (\a x, \a y).
*/
QRgb QImage::pixel(int x, int y) const
{
    if (!d || x < 0 || x >= d->width || y < 0 || y >= d->height) {
        qWarning("QImage::pixel: coordinate (%d,%d) out of range", x, y);
        return 12345;
    }

    const uchar *s = d->data + y * d->bytes_per_line;

    int index = -1;
    switch (d->format) {
    case Format_Mono:
        index = (*(s + (x >> 3)) >> (~x & 7)) & 1;
        break;
    case Format_MonoLSB:
        index = (*(s + (x >> 3)) >> (x & 7)) & 1;
        break;
    case Format_Indexed8:
        index = s[x];
        break;
    default:
        break;
    }
    if (index >= 0) {    // Indexed format
        if (index >= d->colortable.size()) {
            qWarning("QImage::pixel: color table index %d out of range.", index);
            return 0;
        }
        return d->colortable.at(index);
    }

    switch (d->format) {
    case Format_RGB32:
        return 0xff000000 | reinterpret_cast<const QRgb *>(s)[x];
    case Format_ARGB32: // Keep old behaviour.
    case Format_ARGB32_Premultiplied:
        return reinterpret_cast<const QRgb *>(s)[x];
    case Format_RGBX8888:
    case Format_RGBA8888: // Match ARGB32 behavior.
    case Format_RGBA8888_Premultiplied:
        return RGBA2ARGB(reinterpret_cast<const quint32 *>(s)[x]);
    case Format_BGR30:
    case Format_A2BGR30_Premultiplied:
        return qConvertA2rgb30ToArgb32<PixelOrderBGR>(reinterpret_cast<const quint32 *>(s)[x]);
    case Format_RGB30:
    case Format_A2RGB30_Premultiplied:
        return qConvertA2rgb30ToArgb32<PixelOrderRGB>(reinterpret_cast<const quint32 *>(s)[x]);
    case Format_RGB16:
        return qConvertRgb16To32(reinterpret_cast<const quint16 *>(s)[x]);
    default:
        break;
    }
    const QPixelLayout *layout = &qPixelLayouts[d->format];
    uint result;
    const uint *ptr = qFetchPixels[layout->bpp](&result, s, x, 1);
    return *layout->convertToARGB32PM(&result, ptr, 1, 0, 0);
}

/*!
    \fn void QImage::setPixel(const QPoint &position, uint index_or_rgb)

    Sets the pixel index or color at the given \a position to \a
    index_or_rgb.

    If the image's format is either monochrome or paletted, the given \a
    index_or_rgb value must be an index in the image's color table,
    otherwise the parameter must be a QRgb value.

    If \a position is not a valid coordinate pair in the image, or if
    \a index_or_rgb >= colorCount() in the case of monochrome and
    paletted images, the result is undefined.

    \warning This function is expensive due to the call of the internal
    \c{detach()} function called within; if performance is a concern, we
    recommend the use of scanLine() or bits() to access pixel data directly.

    \sa pixel(), {QImage#Pixel Manipulation}{Pixel Manipulation}
*/

/*!
    \overload

    Sets the pixel index or color at (\a x, \a y) to \a index_or_rgb.
*/
void QImage::setPixel(int x, int y, uint index_or_rgb)
{
    if (!d || x < 0 || x >= width() || y < 0 || y >= height()) {
        qWarning("QImage::setPixel: coordinate (%d,%d) out of range", x, y);
        return;
    }
    // detach is called from within scanLine
    uchar * s = scanLine(y);
    switch(d->format) {
    case Format_Mono:
    case Format_MonoLSB:
        if (index_or_rgb > 1) {
            qWarning("QImage::setPixel: Index %d out of range", index_or_rgb);
        } else if (format() == Format_MonoLSB) {
            if (index_or_rgb==0)
                *(s + (x >> 3)) &= ~(1 << (x & 7));
            else
                *(s + (x >> 3)) |= (1 << (x & 7));
        } else {
            if (index_or_rgb==0)
                *(s + (x >> 3)) &= ~(1 << (7-(x & 7)));
            else
                *(s + (x >> 3)) |= (1 << (7-(x & 7)));
        }
        return;
    case Format_Indexed8:
        if (index_or_rgb >= (uint)d->colortable.size()) {
            qWarning("QImage::setPixel: Index %d out of range", index_or_rgb);
            return;
        }
        s[x] = index_or_rgb;
        return;
    case Format_RGB32:
        //make sure alpha is 255, we depend on it in qdrawhelper for cases
        // when image is set as a texture pattern on a qbrush
        ((uint *)s)[x] = 0xff000000 | index_or_rgb;
        return;
    case Format_ARGB32:
    case Format_ARGB32_Premultiplied:
        ((uint *)s)[x] = index_or_rgb;
        return;
    case Format_RGB16:
        ((quint16 *)s)[x] = qConvertRgb32To16(qUnpremultiply(index_or_rgb));
        return;
    case Format_RGBX8888:
        ((uint *)s)[x] = ARGB2RGBA(0xff000000 | index_or_rgb);
        return;
    case Format_RGBA8888:
    case Format_RGBA8888_Premultiplied:
        ((uint *)s)[x] = ARGB2RGBA(index_or_rgb);
        return;
    case Format_BGR30:
        ((uint *)s)[x] = qConvertRgb32ToRgb30<PixelOrderBGR>(index_or_rgb);
        return;
    case Format_A2BGR30_Premultiplied:
        ((uint *)s)[x] = qConvertArgb32ToA2rgb30<PixelOrderBGR>(index_or_rgb);
        return;
    case Format_RGB30:
        ((uint *)s)[x] = qConvertRgb32ToRgb30<PixelOrderRGB>(index_or_rgb);
        return;
    case Format_A2RGB30_Premultiplied:
        ((uint *)s)[x] = qConvertArgb32ToA2rgb30<PixelOrderRGB>(index_or_rgb);
        return;
    case Format_Invalid:
    case NImageFormats:
        Q_ASSERT(false);
        return;
    default:
        break;
    }

    const QPixelLayout *layout = &qPixelLayouts[d->format];
    uint result;
    const uint *ptr = layout->convertFromARGB32PM(&result, &index_or_rgb, 1, 0, 0);
    qStorePixels[layout->bpp](s, ptr, x, 1);
}

/*!
    \fn QColor QImage::pixelColor(const QPoint &position) const
    \since 5.6

    Returns the color of the pixel at the given \a position as a QColor.

    If the \a position is not valid, an invalid QColor is returned.

    \warning This function is expensive when used for massive pixel
    manipulations. Use constBits() or constScanLine() when many
    pixels needs to be read.

    \sa setPixel(), valid(), constBits(), constScanLine(), {QImage#Pixel Manipulation}{Pixel
    Manipulation}
*/

/*!
    \overload
    \since 5.6

    Returns the color of the pixel at coordinates (\a x, \a y) as a QColor.
*/
QColor QImage::pixelColor(int x, int y) const
{
    if (!d || x < 0 || x >= d->width || y < 0 || y >= height()) {
        qWarning("QImage::pixelColor: coordinate (%d,%d) out of range", x, y);
        return QColor();
    }

    QRgba64 c;
    const uchar * s = constScanLine(y);
    switch (d->format) {
    case Format_BGR30:
    case Format_A2BGR30_Premultiplied:
        c = qConvertA2rgb30ToRgb64<PixelOrderBGR>(reinterpret_cast<const quint32 *>(s)[x]);
        break;
    case Format_RGB30:
    case Format_A2RGB30_Premultiplied:
        c = qConvertA2rgb30ToRgb64<PixelOrderRGB>(reinterpret_cast<const quint32 *>(s)[x]);
        break;
    default:
        c = QRgba64::fromArgb32(pixel(x, y));
        break;
    }
    // QColor is always unpremultiplied
    if (hasAlphaChannel() && qPixelLayouts[d->format].premultiplied)
        c = c.unpremultiplied();
    return QColor(c);
}

/*!
    \fn void QImage::setPixelColor(const QPoint &position, const QColor &color)
    \since 5.6

    Sets the color at the given \a position to \a color.

    If \a position is not a valid coordinate pair in the image, or
    the image's format is either monochrome or paletted, the result is undefined.

    \warning This function is expensive due to the call of the internal
    \c{detach()} function called within; if performance is a concern, we
    recommend the use of scanLine() or bits() to access pixel data directly.

    \sa pixel(), bits(), scanLine(), {QImage#Pixel Manipulation}{Pixel Manipulation}
*/

/*!
    \overload
    \since 5.6

    Sets the pixel color at (\a x, \a y) to \a color.
*/
void QImage::setPixelColor(int x, int y, const QColor &color)
{
    if (!d || x < 0 || x >= width() || y < 0 || y >= height()) {
        qWarning("QImage::setPixelColor: coordinate (%d,%d) out of range", x, y);
        return;
    }

    if (!color.isValid()) {
        qWarning("QImage::setPixelColor: color is invalid");
        return;
    }

    // QColor is always unpremultiplied
    QRgba64 c = color.rgba64();
    if (!hasAlphaChannel())
        c.setAlpha(65535);
    else if (qPixelLayouts[d->format].premultiplied)
        c = c.premultiplied();
    // detach is called from within scanLine
    uchar * s = scanLine(y);
    switch (d->format) {
    case Format_Mono:
    case Format_MonoLSB:
    case Format_Indexed8:
        qWarning("QImage::setPixelColor: called on monochrome or indexed format");
        return;
    case Format_BGR30:
        ((uint *)s)[x] = qConvertRgb64ToRgb30<PixelOrderBGR>(c) | 0xc0000000;
        return;
    case Format_A2BGR30_Premultiplied:
        ((uint *)s)[x] = qConvertRgb64ToRgb30<PixelOrderBGR>(c);
        return;
    case Format_RGB30:
        ((uint *)s)[x] = qConvertRgb64ToRgb30<PixelOrderRGB>(c) | 0xc0000000;
        return;
    case Format_A2RGB30_Premultiplied:
        ((uint *)s)[x] = qConvertRgb64ToRgb30<PixelOrderRGB>(c);
        return;
    default:
        setPixel(x, y, c.toArgb32());
        return;
    }
}

/*!
    Returns \c true if all the colors in the image are shades of gray
    (i.e. their red, green and blue components are equal); otherwise
    false.

    Note that this function is slow for images without color table.

    \sa isGrayscale()
*/
bool QImage::allGray() const
{
    if (!d)
        return true;

    switch (d->format) {
    case Format_Mono:
    case Format_MonoLSB:
    case Format_Indexed8:
        for (int i = 0; i < d->colortable.size(); ++i) {
            if (!qIsGray(d->colortable.at(i)))
                return false;
        }
        return true;
    case Format_Alpha8:
        return false;
    case Format_Grayscale8:
        return true;
    case Format_RGB32:
    case Format_ARGB32:
    case Format_ARGB32_Premultiplied:
#if Q_BYTE_ORDER == Q_LITTLE_ENDIAN
    case Format_RGBX8888:
    case Format_RGBA8888:
    case Format_RGBA8888_Premultiplied:
#endif
        for (int j = 0; j < d->height; ++j) {
            const QRgb *b = (const QRgb *)constScanLine(j);
            for (int i = 0; i < d->width; ++i) {
                if (!qIsGray(b[i]))
                    return false;
            }
        }
        return true;
    case Format_RGB16:
        for (int j = 0; j < d->height; ++j) {
            const quint16 *b = (const quint16 *)constScanLine(j);
            for (int i = 0; i < d->width; ++i) {
                if (!qIsGray(qConvertRgb16To32(b[i])))
                    return false;
            }
        }
        return true;
    default:
        break;
    }

    const int buffer_size = 2048;
    uint buffer[buffer_size];
    const QPixelLayout *layout = &qPixelLayouts[d->format];
    FetchPixelsFunc fetch = qFetchPixels[layout->bpp];
    for (int j = 0; j < d->height; ++j) {
        const uchar *b = constScanLine(j);
        int x = 0;
        while (x < d->width) {
            int l = qMin(d->width - x, buffer_size);
            const uint *ptr = fetch(buffer, b, x, l);
            ptr = layout->convertToARGB32PM(buffer, ptr, l, 0, 0);
            for (int i = 0; i < l; ++i) {
                if (!qIsGray(ptr[i]))
                    return false;
            }
            x += l;
        }
    }
    return true;
}

/*!
    For 32-bit images, this function is equivalent to allGray().

    For color indexed images, this function returns \c true if
    color(i) is QRgb(i, i, i) for all indexes of the color table;
    otherwise returns \c false.

    \sa allGray(), {QImage#Image Formats}{Image Formats}
*/
bool QImage::isGrayscale() const
{
    if (!d)
        return false;

    if (d->format == QImage::Format_Alpha8)
        return false;

    if (d->format == QImage::Format_Grayscale8)
        return true;

    switch (depth()) {
    case 32:
    case 24:
    case 16:
        return allGray();
    case 8: {
        Q_ASSERT(d->format == QImage::Format_Indexed8);
        for (int i = 0; i < colorCount(); i++)
            if (d->colortable.at(i) != qRgb(i,i,i))
                return false;
        return true;
        }
    }
    return false;
}

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

    Returns a copy of the image 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 image.
*/

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

    Returns a copy of the image scaled to a rectangle defined by the
    given \a size according to the given \a aspectRatioMode and \a
    transformMode.

    \image qimage-scaling.png

    \list
    \li If \a aspectRatioMode is Qt::IgnoreAspectRatio, the image
       is scaled to \a size.
    \li If \a aspectRatioMode is Qt::KeepAspectRatio, the image is
       scaled to a rectangle as large as possible inside \a size, preserving the aspect ratio.
    \li If \a aspectRatioMode is Qt::KeepAspectRatioByExpanding,
       the image 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 image.

    \sa isNull(), {QImage#Image Transformations}{Image
    Transformations}
*/
QImage QImage::scaled(const QSize& s, Qt::AspectRatioMode aspectMode, Qt::TransformationMode mode) const
{
    if (!d) {
        qWarning("QImage::scaled: Image is a null image");
        return QImage();
    }
    if (s.isEmpty())
        return QImage();

    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());
    QImage img = transformed(wm, mode);
    return img;
}

/*!
    \fn QImage QImage::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.

    This function automatically calculates the height of the image so
    that its aspect ratio is preserved.

    If the given \a width is 0 or negative, a null image is returned.

    \sa {QImage#Image Transformations}{Image Transformations}
*/
QImage QImage::scaledToWidth(int w, Qt::TransformationMode mode) const
{
    if (!d) {
        qWarning("QImage::scaleWidth: Image is a null image");
        return QImage();
    }
    if (w <= 0)
        return QImage();

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

/*!
    \fn QImage QImage::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.

    This function automatically calculates the width of the image so that
    the ratio of the image is preserved.

    If the given \a height is 0 or negative, a null image is returned.

    \sa {QImage#Image Transformations}{Image Transformations}
*/
QImage QImage::scaledToHeight(int h, Qt::TransformationMode mode) const
{
    if (!d) {
        qWarning("QImage::scaleHeight: Image is a null image");
        return QImage();
    }
    if (h <= 0)
        return QImage();

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


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

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

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

    \sa transformed(), {QImage#Image Transformations}{Image
    Transformations}
*/
QMatrix QImage::trueMatrix(const QMatrix &matrix, int w, int h)
{
    return trueMatrix(QTransform(matrix), w, h).toAffine();
}

/*!
    Returns a copy of the image that is transformed using the given
    transformation \a matrix and transformation \a mode.

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

    \sa trueMatrix(), {QImage#Image Transformations}{Image
    Transformations}
*/
QImage QImage::transformed(const QMatrix &matrix, Qt::TransformationMode mode) const
{
    return transformed(QTransform(matrix), mode);
}

/*!
    Builds and returns a 1-bpp mask from the alpha buffer in this
    image. Returns a null image if the image's format is
    QImage::Format_RGB32.

    The \a flags argument is a bitwise-OR of the
    Qt::ImageConversionFlags, and controls the conversion
    process. Passing 0 for flags sets all the default options.

    The returned image has little-endian bit order (i.e. the image's
    format is QImage::Format_MonoLSB), which you can convert to
    big-endian (QImage::Format_Mono) using the convertToFormat()
    function.

    \sa createHeuristicMask(), {QImage#Image Transformations}{Image
    Transformations}
*/
QImage QImage::createAlphaMask(Qt::ImageConversionFlags flags) const
{
    if (!d || d->format == QImage::Format_RGB32)
        return QImage();

    if (d->depth == 1) {
        // A monochrome pixmap, with alpha channels on those two colors.
        // Pretty unlikely, so use less efficient solution.
        return convertToFormat(Format_Indexed8, flags).createAlphaMask(flags);
    }

    QImage mask(d->width, d->height, Format_MonoLSB);
    if (!mask.isNull())
        dither_to_Mono(mask.d, d, flags, true);
    return mask;
}

#ifndef QT_NO_IMAGE_HEURISTIC_MASK
/*!
    Creates and returns a 1-bpp heuristic mask for this image.

    The function works by selecting a color from one of the corners,
    then chipping away pixels of that color starting at all the edges.
    The four corners vote for which color is to be masked away. In
    case of a draw (this generally means that this function is not
    applicable to the image), the result is arbitrary.

    The returned image has little-endian bit order (i.e. the image's
    format is QImage::Format_MonoLSB), which you can convert to
    big-endian (QImage::Format_Mono) using the convertToFormat()
    function.

    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.

    Note that this function disregards the alpha buffer.

    \sa createAlphaMask(), {QImage#Image Transformations}{Image
    Transformations}
*/

QImage QImage::createHeuristicMask(bool clipTight) const
{
    if (!d)
        return QImage();

    if (d->depth != 32) {
        QImage img32 = convertToFormat(Format_RGB32);
        return img32.createHeuristicMask(clipTight);
    }

#define PIX(x,y)  (*((const QRgb*)scanLine(y)+x) & 0x00ffffff)

    int w = width();
    int h = height();
    QImage m(w, h, Format_MonoLSB);
    QIMAGE_SANITYCHECK_MEMORY(m);
    m.setColorCount(2);
    m.setColor(0, QColor(Qt::color0).rgba());
    m.setColor(1, QColor(Qt::color1).rgba());
    m.fill(0xff);

    QRgb background = PIX(0,0);
    if (background != PIX(w-1,0) &&
         background != PIX(0,h-1) &&
         background != PIX(w-1,h-1)) {
        background = PIX(w-1,0);
        if (background != PIX(w-1,h-1) &&
             background != PIX(0,h-1) &&
             PIX(0,h-1) == PIX(w-1,h-1)) {
            background = PIX(w-1,h-1);
        }
    }

    int x,y;
    bool done = false;
    uchar *ypp, *ypc, *ypn;
    while(!done) {
        done = true;
        ypn = m.scanLine(0);
        ypc = 0;
        for (y = 0; y < h; y++) {
            ypp = ypc;
            ypc = ypn;
            ypn = (y == h-1) ? 0 : m.scanLine(y+1);
            const QRgb *p = (const QRgb *)scanLine(y);
            for (x = 0; x < w; x++) {
                // slowness here - it's possible to do six of these tests
                // together in one go. oh well.
                if ((x == 0 || y == 0 || x == w-1 || y == h-1 ||
                       !(*(ypc + ((x-1) >> 3)) & (1 << ((x-1) & 7))) ||
                       !(*(ypc + ((x+1) >> 3)) & (1 << ((x+1) & 7))) ||
                       !(*(ypp + (x     >> 3)) & (1 << (x     & 7))) ||
                       !(*(ypn + (x     >> 3)) & (1 << (x     & 7)))) &&
                     (       (*(ypc + (x     >> 3)) & (1 << (x     & 7)))) &&
                     ((*p & 0x00ffffff) == background)) {
                    done = false;
                    *(ypc + (x >> 3)) &= ~(1 << (x & 7));
                }
                p++;
            }
        }
    }

    if (!clipTight) {
        ypn = m.scanLine(0);
        ypc = 0;
        for (y = 0; y < h; y++) {
            ypp = ypc;
            ypc = ypn;
            ypn = (y == h-1) ? 0 : m.scanLine(y+1);
            const QRgb *p = (const QRgb *)scanLine(y);
            for (x = 0; x < w; x++) {
                if ((*p & 0x00ffffff) != background) {
                    if (x > 0)
                        *(ypc + ((x-1) >> 3)) |= (1 << ((x-1) & 7));
                    if (x < w-1)
                        *(ypc + ((x+1) >> 3)) |= (1 << ((x+1) & 7));
                    if (y > 0)
                        *(ypp + (x >> 3)) |= (1 << (x & 7));
                    if (y < h-1)
                        *(ypn + (x >> 3)) |= (1 << (x & 7));
                }
                p++;
            }
        }
    }

#undef PIX

    return m;
}
#endif //QT_NO_IMAGE_HEURISTIC_MASK

/*!
    Creates and returns a mask for this image based on the given \a
    color value. If the \a mode is MaskInColor (the default value),
    all pixels matching \a color will be opaque pixels in the mask. If
    \a mode is MaskOutColor, all pixels matching the given color will
    be transparent.

    \sa createAlphaMask(), createHeuristicMask()
*/

QImage QImage::createMaskFromColor(QRgb color, Qt::MaskMode mode) const
{
    if (!d)
        return QImage();
    QImage maskImage(size(), QImage::Format_MonoLSB);
    QIMAGE_SANITYCHECK_MEMORY(maskImage);
    maskImage.fill(0);
    uchar *s = maskImage.bits();

    if (depth() == 32) {
        for (int h = 0; h < d->height; h++) {
            const uint *sl = (const uint *) scanLine(h);
            for (int w = 0; w < d->width; w++) {
                if (sl[w] == color)
                    *(s + (w >> 3)) |= (1 << (w & 7));
            }
            s += maskImage.bytesPerLine();
        }
    } else {
        for (int h = 0; h < d->height; h++) {
            for (int w = 0; w < d->width; w++) {
                if ((uint) pixel(w, h) == color)
                    *(s + (w >> 3)) |= (1 << (w & 7));
            }
            s += maskImage.bytesPerLine();
        }
    }
    if  (mode == Qt::MaskOutColor)
        maskImage.invertPixels();
    return maskImage;
}

/*!
    \fn QImage QImage::mirrored(bool horizontal = false, bool vertical = true) const
    Returns a mirror of the image, mirrored in the horizontal and/or
    the vertical direction depending on whether \a horizontal and \a
    vertical are set to true or false.

    Note that the original image is not changed.

    \sa {QImage#Image Transformations}{Image Transformations}
*/

template<class T> inline void do_mirror_data(QImageData *dst, QImageData *src,
                                             int dstX0, int dstY0,
                                             int dstXIncr, int dstYIncr,
                                             int w, int h)
{
    if (dst == src) {
        // When mirroring in-place, stop in the middle for one of the directions, since we
        // are swapping the bytes instead of merely copying.
        const int srcXEnd = (dstX0 && !dstY0) ? w / 2 : w;
        const int srcYEnd = dstY0 ? h / 2 : h;
        for (int srcY = 0, dstY = dstY0; srcY < srcYEnd; ++srcY, dstY += dstYIncr) {
            T *srcPtr = (T *) (src->data + srcY * src->bytes_per_line);
            T *dstPtr = (T *) (dst->data + dstY * dst->bytes_per_line);
            for (int srcX = 0, dstX = dstX0; srcX < srcXEnd; ++srcX, dstX += dstXIncr)
                std::swap(srcPtr[srcX], dstPtr[dstX]);
        }
        // If mirroring both ways, the middle line needs to be mirrored horizontally only.
        if (dstX0 && dstY0 && (h & 1)) {
            int srcY = h / 2;
            int srcXEnd2 = w / 2;
            T *srcPtr = (T *) (src->data + srcY * src->bytes_per_line);
            for (int srcX = 0, dstX = dstX0; srcX < srcXEnd2; ++srcX, dstX += dstXIncr)
                std::swap(srcPtr[srcX], srcPtr[dstX]);
        }
    } else {
        for (int srcY = 0, dstY = dstY0; srcY < h; ++srcY, dstY += dstYIncr) {
            T *srcPtr = (T *) (src->data + srcY * src->bytes_per_line);
            T *dstPtr = (T *) (dst->data + dstY * dst->bytes_per_line);
            for (int srcX = 0, dstX = dstX0; srcX < w; ++srcX, dstX += dstXIncr)
                dstPtr[dstX] = srcPtr[srcX];
        }
    }
}

inline void do_flip(QImageData *dst, QImageData *src, int w, int h, int depth)
{
    const int data_bytes_per_line = w * (depth / 8);
    if (dst == src) {
        uint *srcPtr = reinterpret_cast<uint *>(src->data);
        uint *dstPtr = reinterpret_cast<uint *>(dst->data + (h - 1) * dst->bytes_per_line);
        h = h / 2;
        const int uint_per_line = (data_bytes_per_line + 3) >> 2; // bytes per line must be a multiple of 4
        for (int y = 0; y < h; ++y) {
            // This is auto-vectorized, no need for SSE2 or NEON versions:
            for (int x = 0; x < uint_per_line; x++) {
                const uint d = dstPtr[x];
                const uint s = srcPtr[x];
                dstPtr[x] = s;
                srcPtr[x] = d;
            }
            srcPtr += src->bytes_per_line >> 2;
            dstPtr -= dst->bytes_per_line >> 2;
        }

    } else {
        const uchar *srcPtr = src->data;
        uchar *dstPtr = dst->data + (h - 1) * dst->bytes_per_line;
        for (int y = 0; y < h; ++y) {
            memcpy(dstPtr, srcPtr, data_bytes_per_line);
            srcPtr += src->bytes_per_line;
            dstPtr -= dst->bytes_per_line;
        }
    }
}

inline void do_mirror(QImageData *dst, QImageData *src, bool horizontal, bool vertical)
{
    Q_ASSERT(src->width == dst->width && src->height == dst->height && src->depth == dst->depth);
    int w = src->width;
    int h = src->height;
    int depth = src->depth;

    if (src->depth == 1) {
        w = (w + 7) / 8; // byte aligned width
        depth = 8;
    }

    if (vertical && !horizontal) {
        // This one is simple and common, so do it a little more optimized
        do_flip(dst, src, w, h, depth);
        return;
    }

    int dstX0 = 0, dstXIncr = 1;
    int dstY0 = 0, dstYIncr = 1;
    if (horizontal) {
        // 0 -> w-1, 1 -> w-2, 2 -> w-3, ...
        dstX0 = w - 1;
        dstXIncr = -1;
    }
    if (vertical) {
        // 0 -> h-1, 1 -> h-2, 2 -> h-3, ...
        dstY0 = h - 1;
        dstYIncr = -1;
    }

    switch (depth) {
    case 32:
        do_mirror_data<quint32>(dst, src, dstX0, dstY0, dstXIncr, dstYIncr, w, h);
        break;
    case 24:
        do_mirror_data<quint24>(dst, src, dstX0, dstY0, dstXIncr, dstYIncr, w, h);
        break;
    case 16:
        do_mirror_data<quint16>(dst, src, dstX0, dstY0, dstXIncr, dstYIncr, w, h);
        break;
    case 8:
        do_mirror_data<quint8>(dst, src, dstX0, dstY0, dstXIncr, dstYIncr, w, h);
        break;
    default:
        Q_ASSERT(false);
        break;
    }

    // The bytes are now all in the correct place. In addition, the bits in the individual
    // bytes have to be flipped too when horizontally mirroring a 1 bit-per-pixel image.
    if (horizontal && dst->depth == 1) {
        Q_ASSERT(dst->format == QImage::Format_Mono || dst->format == QImage::Format_MonoLSB);
        const int shift = 8 - (dst->width % 8);
        const uchar *bitflip = qt_get_bitflip_array();
        for (int y = 0; y < h; ++y) {
            uchar *begin = dst->data + y * dst->bytes_per_line;
            uchar *end = begin + dst->bytes_per_line;
            for (uchar *p = begin; p < end; ++p) {
                *p = bitflip[*p];
                // When the data is non-byte aligned, an extra bit shift (of the number of
                // unused bits at the end) is needed for the entire scanline.
                if (shift != 8 && p != begin) {
                    if (dst->format == QImage::Format_Mono) {
                        for (int i = 0; i < shift; ++i) {
                            p[-1] <<= 1;
                            p[-1] |= (*p & (128 >> i)) >> (7 - i);
                        }
                    } else {
                        for (int i = 0; i < shift; ++i) {
                            p[-1] >>= 1;
                            p[-1] |= (*p & (1 << i)) << (7 - i);
                        }
                    }
                }
            }
            if (shift != 8) {
                if (dst->format == QImage::Format_Mono)
                    end[-1] <<= shift;
                else
                    end[-1] >>= shift;
            }
        }
    }
}

/*!
    \internal
*/
QImage QImage::mirrored_helper(bool horizontal, bool vertical) const
{
    if (!d)
        return QImage();

    if ((d->width <= 1 && d->height <= 1) || (!horizontal && !vertical))
        return *this;

    // Create result image, copy colormap
    QImage result(d->width, d->height, d->format);
    QIMAGE_SANITYCHECK_MEMORY(result);

    // check if we ran out of of memory..
    if (!result.d)
        return QImage();

    result.d->colortable = d->colortable;
    result.d->has_alpha_clut = d->has_alpha_clut;
    copyMetadata(result.d, d);

    do_mirror(result.d, d, horizontal, vertical);

    return result;
}

/*!
    \internal
*/
void QImage::mirrored_inplace(bool horizontal, bool vertical)
{
    if (!d || (d->width <= 1 && d->height <= 1) || (!horizontal && !vertical))
        return;

    detach();
    if (!d->own_data)
        *this = copy();

    do_mirror(d, d, horizontal, vertical);
}

/*!
    \fn QImage QImage::rgbSwapped() const
    Returns a QImage in which the values of the red and blue
    components of all pixels have been swapped, effectively converting
    an RGB image to an BGR image.

    The original QImage is not changed.

    \sa {QImage#Image Transformations}{Image Transformations}
*/

inline void rgbSwapped_generic(int width, int height, const QImage *src, QImage *dst, const QPixelLayout* layout)
{
    Q_ASSERT(layout->redWidth == layout->blueWidth);
    FetchPixelsFunc fetch = qFetchPixels[layout->bpp];
    StorePixelsFunc store = qStorePixels[layout->bpp];

    const uint redBlueMask = (1 << layout->redWidth) - 1;
    const uint alphaGreenMask = (((1 << layout->alphaWidth) - 1) << layout->alphaShift)
            | (((1 << layout->greenWidth) - 1) << layout->greenShift);

    const int buffer_size = 2048;
    uint buffer[buffer_size];
    for (int i = 0; i < height; ++i) {
        uchar *q = dst->scanLine(i);
        const uchar *p = src->constScanLine(i);
        int x = 0;
        while (x < width) {
            int l = qMin(width - x, buffer_size);
            const uint *ptr = fetch(buffer, p, x, l);
            for (int j = 0; j < l; ++j) {
                uint red = (ptr[j] >> layout->redShift) & redBlueMask;
                uint blue = (ptr[j] >> layout->blueShift) & redBlueMask;
                buffer[j] = (ptr[j] & alphaGreenMask)
                        | (red << layout->blueShift)
                        | (blue << layout->redShift);
            }
            store(q, buffer, x, l);
            x += l;
        }
    }
}

/*!
    \internal
*/
QImage QImage::rgbSwapped_helper() const
{
    if (isNull())
        return *this;

    QImage res;

    switch (d->format) {
    case Format_Invalid:
    case NImageFormats:
        Q_ASSERT(false);
        break;
    case Format_Alpha8:
    case Format_Grayscale8:
        return *this;
    case Format_Mono:
    case Format_MonoLSB:
    case Format_Indexed8:
        res = copy();
        for (int i = 0; i < res.d->colortable.size(); i++) {
            QRgb c = res.d->colortable.at(i);
            res.d->colortable[i] = QRgb(((c << 16) & 0xff0000) | ((c >> 16) & 0xff) | (c & 0xff00ff00));
        }
        break;
    case Format_RGB32:
    case Format_ARGB32:
    case Format_ARGB32_Premultiplied:
#if Q_BYTE_ORDER == Q_LITTLE_ENDIAN
    case Format_RGBX8888:
    case Format_RGBA8888:
    case Format_RGBA8888_Premultiplied:
#endif
        res = QImage(d->width, d->height, d->format);
        QIMAGE_SANITYCHECK_MEMORY(res);
        for (int i = 0; i < d->height; i++) {
            uint *q = (uint*)res.scanLine(i);
            const uint *p = (const uint*)constScanLine(i);
            const uint *end = p + d->width;
            while (p < end) {
                uint c = *p;
                *q = ((c << 16) & 0xff0000) | ((c >> 16) & 0xff) | (c & 0xff00ff00);
                p++;
                q++;
            }
        }
        break;
    case Format_RGB16:
        res = QImage(d->width, d->height, d->format);
        QIMAGE_SANITYCHECK_MEMORY(res);
        for (int i = 0; i < d->height; i++) {
            ushort *q = (ushort*)res.scanLine(i);
            const ushort *p = (const ushort*)constScanLine(i);
            const ushort *end = p + d->width;
            while (p < end) {
                ushort c = *p;
                *q = ((c << 11) & 0xf800) | ((c >> 11) & 0x1f) | (c & 0x07e0);
                p++;
                q++;
            }
        }
        break;
    case Format_BGR30:
    case Format_A2BGR30_Premultiplied:
    case Format_RGB30:
    case Format_A2RGB30_Premultiplied:
        res = QImage(d->width, d->height, d->format);
        QIMAGE_SANITYCHECK_MEMORY(res);
        for (int i = 0; i < d->height; i++) {
            uint *q = (uint*)res.scanLine(i);
            const uint *p = (const uint*)constScanLine(i);
            const uint *end = p + d->width;
            while (p < end) {
                *q = qRgbSwapRgb30(*p);
                p++;
                q++;
            }
        }
        break;
    default:
        res = QImage(d->width, d->height, d->format);
        rgbSwapped_generic(d->width, d->height, this, &res, &qPixelLayouts[d->format]);
        break;
    }
    copyMetadata(res.d, d);
    return res;
}

/*!
    \internal
*/
void QImage::rgbSwapped_inplace()
{
    if (isNull())
        return;

    detach();
    if (!d->own_data)
        *this = copy();

    switch (d->format) {
    case Format_Invalid:
    case NImageFormats:
        Q_ASSERT(false);
        break;
    case Format_Alpha8:
    case Format_Grayscale8:
        return;
    case Format_Mono:
    case Format_MonoLSB:
    case Format_Indexed8:
        for (int i = 0; i < d->colortable.size(); i++) {
            QRgb c = d->colortable.at(i);
            d->colortable[i] = QRgb(((c << 16) & 0xff0000) | ((c >> 16) & 0xff) | (c & 0xff00ff00));
        }
        break;
    case Format_RGB32:
    case Format_ARGB32:
    case Format_ARGB32_Premultiplied:
#if Q_BYTE_ORDER == Q_LITTLE_ENDIAN
    case Format_RGBX8888:
    case Format_RGBA8888:
    case Format_RGBA8888_Premultiplied:
#endif
        for (int i = 0; i < d->height; i++) {
            uint *p = (uint*)scanLine(i);
            uint *end = p + d->width;
            while (p < end) {
                uint c = *p;
                *p = ((c << 16) & 0xff0000) | ((c >> 16) & 0xff) | (c & 0xff00ff00);
                p++;
            }
        }
        break;
    case Format_RGB16:
        for (int i = 0; i < d->height; i++) {
            ushort *p = (ushort*)scanLine(i);
            ushort *end = p + d->width;
            while (p < end) {
                ushort c = *p;
                *p = ((c << 11) & 0xf800) | ((c >> 11) & 0x1f) | (c & 0x07e0);
                p++;
            }
        }
        break;
    case Format_BGR30:
    case Format_A2BGR30_Premultiplied:
    case Format_RGB30:
    case Format_A2RGB30_Premultiplied:
        for (int i = 0; i < d->height; i++) {
            uint *p = (uint*)scanLine(i);
            uint *end = p + d->width;
            while (p < end) {
                *p = qRgbSwapRgb30(*p);
                p++;
            }
        }
        break;
    default:
        rgbSwapped_generic(d->width, d->height, this, this, &qPixelLayouts[d->format]);
        break;
    }
}

/*!
    Loads an image from the file with the given \a fileName. Returns \c true if
    the image was successfully loaded; otherwise invalidates the image
    and returns \c false.

    The loader attempts to read the image using the specified \a format, e.g.,
    PNG or JPG. If \a format is not specified (which is the default), it is
    auto-detected based on the file's suffix and header. For details, see
    {QImageReader::setAutoDetectImageFormat()}{QImageReader}.

    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.

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

bool QImage::load(const QString &fileName, const char* format)
{
    QImage image = QImageReader(fileName, format).read();
    operator=(image);
    return !isNull();
}

/*!
    \overload

    This function reads a QImage from the given \a device. This can,
    for example, be used to load an image directly into a QByteArray.
*/

bool QImage::load(QIODevice* device, const char* format)
{
    QImage image = QImageReader(device, format).read();
    operator=(image);
    return !isNull();
}

/*!
    \fn bool QImage::loadFromData(const uchar *data, int len, const char *format)

    Loads an image from the first \a len bytes of the given binary \a
    data. Returns \c true if the image was successfully loaded; otherwise
    invalidates the image and returns \c false.

    The loader attempts to read the image using the specified \a format, e.g.,
    PNG or JPG. If \a format is not specified (which is the default), the
    loader probes the file for a header to guess the file format.

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

bool QImage::loadFromData(const uchar *data, int len, const char *format)
{
    QImage image = fromData(data, len, format);
    operator=(image);
    return !isNull();
}

/*!
    \fn bool QImage::loadFromData(const QByteArray &data, const char *format)

    \overload

    Loads an image from the given QByteArray \a data.
*/

/*!
    \fn QImage QImage::fromData(const uchar *data, int size, const char *format)

    Constructs a QImage from the first \a size bytes of the given
    binary \a data. The loader attempts to read the image using the
    specified \a format. If \a format is not specified (which is the default),
    the loader probes the data for a header to guess the file format.

    If \a format is specified, it must be one of the values returned by
    QImageReader::supportedImageFormats().

    If the loading of the image fails, the image returned will be a null image.

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

QImage QImage::fromData(const uchar *data, int size, const char *format)
{
    QByteArray a = QByteArray::fromRawData(reinterpret_cast<const char *>(data), size);
    QBuffer b;
    b.setData(a);
    b.open(QIODevice::ReadOnly);
    return QImageReader(&b, format).read();
}

/*!
    \fn QImage QImage::fromData(const QByteArray &data, const char *format)

    \overload

    Loads an image from the given QByteArray \a data.
*/

/*!
    Saves the image to the file with the given \a fileName, using the
    given image file \a format and \a quality factor. If \a format is
    0, QImage will attempt to guess the format by looking at \a fileName's
    suffix.

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

    Returns \c true if the image was successfully saved; otherwise
    returns \c false.

    \sa {QImage#Reading and Writing Image Files}{Reading and Writing
    Image Files}
*/
bool QImage::save(const QString &fileName, const char *format, int quality) const
{
    if (isNull())
        return false;
    QImageWriter writer(fileName, format);
    return d->doImageIO(this, &writer, quality);
}

/*!
    \overload

    This function writes a QImage to the given \a device.

    This can, for example, be used to save an image directly into a
    QByteArray:

    \snippet image/image.cpp 0
*/

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

/* \internal
*/

bool QImageData::doImageIO(const QImage *image, 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(*image);
}

/*****************************************************************************
  QImage stream functions
 *****************************************************************************/
#if !defined(QT_NO_DATASTREAM)
/*!
    \fn QDataStream &operator<<(QDataStream &stream, const QImage &image)
    \relates QImage

    Writes the given \a image to the given \a stream as a PNG image,
    or as a BMP image if the stream's version is 1. Note that writing
    the stream to a file will not produce a valid image file.

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

QDataStream &operator<<(QDataStream &s, const QImage &image)
{
    if (s.version() >= 5) {
        if (image.isNull()) {
            s << (qint32) 0; // null image marker
            return s;
        } else {
            s << (qint32) 1;
            // continue ...
        }
    }
    QImageWriter writer(s.device(), s.version() == 1 ? "bmp" : "png");
    writer.write(image);
    return s;
}

/*!
    \fn QDataStream &operator>>(QDataStream &stream, QImage &image)
    \relates QImage

    Reads an image from the given \a stream and stores it in the given
    \a image.

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

QDataStream &operator>>(QDataStream &s, QImage &image)
{
    if (s.version() >= 5) {
        qint32 nullMarker;
        s >> nullMarker;
        if (!nullMarker) {
            image = QImage(); // null image
            return s;
        }
    }
    image = QImageReader(s.device(), 0).read();
    return s;
}
#endif // QT_NO_DATASTREAM



/*!
    \fn bool QImage::operator==(const QImage & image) const

    Returns \c true if this image and the given \a image have the same
    contents; otherwise returns \c false.

    The comparison can be slow, unless there is some obvious
    difference (e.g. different size or format), in which case the
    function will return quickly.

    \sa operator=()
*/

bool QImage::operator==(const QImage & i) const
{
    // same object, or shared?
    if (i.d == d)
        return true;
    if (!i.d || !d)
        return false;

    // obviously different stuff?
    if (i.d->height != d->height || i.d->width != d->width || i.d->format != d->format)
        return false;

    if (d->format != Format_RGB32) {
        if (d->format >= Format_ARGB32) { // all bits defined
            const int n = d->width * d->depth / 8;
            if (n == d->bytes_per_line && n == i.d->bytes_per_line) {
                if (memcmp(bits(), i.bits(), d->nbytes))
                    return false;
            } else {
                for (int y = 0; y < d->height; ++y) {
                    if (memcmp(scanLine(y), i.scanLine(y), n))
                        return false;
                }
            }
        } else {
            const int w = width();
            const int h = height();
            const QVector<QRgb> &colortable = d->colortable;
            const QVector<QRgb> &icolortable = i.d->colortable;
            for (int y=0; y<h; ++y) {
                for (int x=0; x<w; ++x) {
                    if (colortable[pixelIndex(x, y)] != icolortable[i.pixelIndex(x, y)])
                        return false;
                }
            }
        }
    } else {
        //alpha channel undefined, so we must mask it out
        for(int l = 0; l < d->height; l++) {
            int w = d->width;
            const uint *p1 = reinterpret_cast<const uint*>(scanLine(l));
            const uint *p2 = reinterpret_cast<const uint*>(i.scanLine(l));
            while (w--) {
                if ((*p1++ & 0x00ffffff) != (*p2++ & 0x00ffffff))
                    return false;
            }
        }
    }
    return true;
}


/*!
    \fn bool QImage::operator!=(const QImage & image) const

    Returns \c true if this image and the given \a image have different
    contents; otherwise returns \c false.

    The comparison can be slow, unless there is some obvious
    difference, such as different widths, in which case the function
    will return quickly.

    \sa operator=()
*/

bool QImage::operator!=(const QImage & i) const
{
    return !(*this == i);
}




/*!
    Returns the number of pixels that fit horizontally in a physical
    meter. Together with dotsPerMeterY(), this number defines the
    intended scale and aspect ratio of the image.

    \sa setDotsPerMeterX(), {QImage#Image Information}{Image
    Information}
*/
int QImage::dotsPerMeterX() const
{
    return d ? qRound(d->dpmx) : 0;
}

/*!
    Returns the number of pixels that fit vertically in a physical
    meter. Together with dotsPerMeterX(), this number defines the
    intended scale and aspect ratio of the image.

    \sa setDotsPerMeterY(), {QImage#Image Information}{Image
    Information}
*/
int QImage::dotsPerMeterY() const
{
    return d ? qRound(d->dpmy) : 0;
}

/*!
    Sets the number of pixels that fit horizontally in a physical
    meter, to \a x.

    Together with dotsPerMeterY(), this number defines the intended
    scale and aspect ratio of the image, and determines the scale
    at which QPainter will draw graphics on the image. It does not
    change the scale or aspect ratio of the image when it is rendered
    on other paint devices.

    \sa dotsPerMeterX(), {QImage#Image Information}{Image Information}
*/
void QImage::setDotsPerMeterX(int x)
{
    if (!d || !x)
        return;
    detach();

    if (d)
        d->dpmx = x;
}

/*!
    Sets the number of pixels that fit vertically in a physical meter,
    to \a y.

    Together with dotsPerMeterX(), this number defines the intended
    scale and aspect ratio of the image, and determines the scale
    at which QPainter will draw graphics on the image. It does not
    change the scale or aspect ratio of the image when it is rendered
    on other paint devices.

    \sa dotsPerMeterY(), {QImage#Image Information}{Image Information}
*/
void QImage::setDotsPerMeterY(int y)
{
    if (!d || !y)
        return;
    detach();

    if (d)
        d->dpmy = y;
}

/*!
    \fn QPoint QImage::offset() const

    Returns the number of pixels by which the image is intended to be
    offset by when positioning relative to other images.

    \sa setOffset(), {QImage#Image Information}{Image Information}
*/
QPoint QImage::offset() const
{
    return d ? d->offset : QPoint();
}


/*!
    \fn void QImage::setOffset(const QPoint& offset)

    Sets the number of pixels by which the image is intended to be
    offset by when positioning relative to other images, to \a offset.

    \sa offset(), {QImage#Image Information}{Image Information}
*/
void QImage::setOffset(const QPoint& p)
{
    if (!d)
        return;
    detach();

    if (d)
        d->offset = p;
}

/*!
    Returns the text keys for this image.

    You can use these keys with text() to list the image text for a
    certain key.

    \sa text()
*/
QStringList QImage::textKeys() const
{
    return d ? QStringList(d->text.keys()) : QStringList();
}

/*!
    Returns the image text associated with the given \a key. If the
    specified \a key is an empty string, the whole image text is
    returned, with each key-text pair separated by a newline.

    \sa setText(), textKeys()
*/
QString QImage::text(const QString &key) const
{
    if (!d)
        return QString();

    if (!key.isEmpty())
        return d->text.value(key);

    QString tmp;
    for (auto it = d->text.begin(), end = d->text.end(); it != end; ++it)
        tmp += it.key() + QLatin1String(": ") + it.value().simplified() + QLatin1String("\n\n");
    if (!tmp.isEmpty())
        tmp.chop(2); // remove final \n\n
    return tmp;
}

/*!
    \fn void QImage::setText(const QString &key, const QString &text)

    Sets the image text to the given \a text and associate it with the
    given \a key.

    If you just want to store a single text block (i.e., a "comment"
    or just a description), you can either pass an empty key, or use a
    generic key like "Description".

    The image text is embedded into the image data when you
    call save() or QImageWriter::write().

    Not all image formats support embedded text. You can find out
    if a specific image or format supports embedding text
    by using QImageWriter::supportsOption(). We give an example:

    \snippet image/supportedformat.cpp 0

    You can use QImageWriter::supportedImageFormats() to find out
    which image formats are available to you.

    \sa text(), textKeys()
*/
void QImage::setText(const QString &key, const QString &value)
{
    if (!d)
        return;
    detach();

    if (d)
        d->text.insert(key, value);
}

/*!
    \fn QString QImage::text(const char* key, const char* language) const
    \obsolete

    Returns the text recorded for the given \a key in the given \a
    language, or in a default language if \a language is 0.

    Use text() instead.

    The language the text is recorded in is no longer relevant since
    the text is always set using QString and UTF-8 representation.
*/

/*!
    \fn QString QImage::text(const QImageTextKeyLang& keywordAndLanguage) const
    \overload
    \obsolete

    Returns the text recorded for the given \a keywordAndLanguage.

    Use text() instead.

    The language the text is recorded in is no longer relevant since
    the text is always set using QString and UTF-8 representation.
*/

/*!
    \fn void QImage::setText(const char* key, const char* language, const QString& text)
    \obsolete

    Sets the image text to the given \a text and associate it with the
    given \a key. The text is recorded in the specified \a language,
    or in a default language if \a language is 0.

    Use setText() instead.

    The language the text is recorded in is no longer relevant since
    the text is always set using QString and UTF-8 representation.

    \omit
    Records string \a  for the keyword \a key. The \a key should be
    a portable keyword recognizable by other software - some suggested
    values can be found in
    \l{http://www.libpng.org/pub/png/spec/1.2/png-1.2-pdg.html#C.Anc-text}
    {the PNG specification}. \a s can be any text. \a lang should
    specify the language code (see
    \l{http://www.rfc-editor.org/rfc/rfc1766.txt}{RFC 1766}) or 0.
    \endomit
*/

/*
    Sets the image bits to the \a pixmap contents and returns a
    reference to the image.

    If the image shares data with other images, it will first
    dereference the shared data.

    Makes a call to QPixmap::convertToImage().
*/

/*!
    \internal

    Used by QPainter to retrieve a paint engine for the image.
*/

QPaintEngine *QImage::paintEngine() const
{
    if (!d)
        return 0;

    if (!d->paintEngine) {
        QPaintDevice *paintDevice = const_cast<QImage *>(this);
        QPaintEngine *paintEngine = 0;
        QPlatformIntegration *platformIntegration = QGuiApplicationPrivate::platformIntegration();
        if (platformIntegration)
            paintEngine = platformIntegration->createImagePaintEngine(paintDevice);
        d->paintEngine = paintEngine ? paintEngine : new QRasterPaintEngine(paintDevice);
    }

    return d->paintEngine;
}


/*!
    \internal

    Returns the size for the specified \a metric on the device.
*/
int QImage::metric(PaintDeviceMetric metric) const
{
    if (!d)
        return 0;

    switch (metric) {
    case PdmWidth:
        return d->width;

    case PdmHeight:
        return d->height;

    case PdmWidthMM:
        return qRound(d->width * 1000 / d->dpmx);

    case PdmHeightMM:
        return qRound(d->height * 1000 / d->dpmy);

    case PdmNumColors:
        return d->colortable.size();

    case PdmDepth:
        return d->depth;

    case PdmDpiX:
        return qRound(d->dpmx * 0.0254);
        break;

    case PdmDpiY:
        return qRound(d->dpmy * 0.0254);
        break;

    case PdmPhysicalDpiX:
        return qRound(d->dpmx * 0.0254);
        break;

    case PdmPhysicalDpiY:
        return qRound(d->dpmy * 0.0254);
        break;

    case PdmDevicePixelRatio:
        return d->devicePixelRatio;
        break;

    case PdmDevicePixelRatioScaled:
        return d->devicePixelRatio * QPaintDevice::devicePixelRatioFScale();
        break;

    default:
        qWarning("QImage::metric(): Unhandled metric type %d", metric);
        break;
    }
    return 0;
}



/*****************************************************************************
  QPixmap (and QImage) helper functions
 *****************************************************************************/
/*
  This internal function contains the common (i.e. platform independent) code
  to do a transformation of pixel data. It is used by QPixmap::transform() and by
  QImage::transform().

  \a trueMat is the true transformation matrix (see QPixmap::trueMatrix()) and
  \a xoffset is an offset to the matrix.

  \a msbfirst specifies for 1bpp images, if the MSB or LSB comes first and \a
  depth specifies the colordepth of the data.

  \a dptr is a pointer to the destination data, \a dbpl specifies the bits per
  line for the destination data, \a p_inc is the offset that we advance for
  every scanline and \a dHeight is the height of the destination image.

  \a sprt is the pointer to the source data, \a sbpl specifies the bits per
  line of the source data, \a sWidth and \a sHeight are the width and height of
  the source data.
*/

#undef IWX_MSB
#define IWX_MSB(b)        if (trigx < maxws && trigy < maxhs) {                              \
                            if (*(sptr+sbpl*(trigy>>12)+(trigx>>15)) &                      \
                                 (1 << (7-((trigx>>12)&7))))                              \
                                *dptr |= b;                                              \
                        }                                                              \
                        trigx += m11;                                                      \
                        trigy += m12;
        // END OF MACRO
#undef IWX_LSB
#define IWX_LSB(b)        if (trigx < maxws && trigy < maxhs) {                              \
                            if (*(sptr+sbpl*(trigy>>12)+(trigx>>15)) &                      \
                                 (1 << ((trigx>>12)&7)))                              \
                                *dptr |= b;                                              \
                        }                                                              \
                        trigx += m11;                                                      \
                        trigy += m12;
        // END OF MACRO
#undef IWX_PIX
#define IWX_PIX(b)        if (trigx < maxws && trigy < maxhs) {                              \
                            if ((*(sptr+sbpl*(trigy>>12)+(trigx>>15)) &              \
                                 (1 << (7-((trigx>>12)&7)))) == 0)                      \
                                *dptr &= ~b;                                              \
                        }                                                              \
                        trigx += m11;                                                      \
                        trigy += m12;
        // END OF MACRO
bool qt_xForm_helper(const QTransform &trueMat, int xoffset, int type, int depth,
                     uchar *dptr, int dbpl, int p_inc, int dHeight,
                     const uchar *sptr, int sbpl, int sWidth, int sHeight)
{
    int m11 = int(trueMat.m11()*4096.0);
    int m12 = int(trueMat.m12()*4096.0);
    int m21 = int(trueMat.m21()*4096.0);
    int m22 = int(trueMat.m22()*4096.0);
    int dx  = qRound(trueMat.dx()*4096.0);
    int dy  = qRound(trueMat.dy()*4096.0);

    int m21ydx = dx + (xoffset<<16) + (m11 + m21) / 2;
    int m22ydy = dy + (m12 + m22) / 2;
    uint trigx;
    uint trigy;
    uint maxws = sWidth<<12;
    uint maxhs = sHeight<<12;

    for (int y=0; y<dHeight; y++) {                // for each target scanline
        trigx = m21ydx;
        trigy = m22ydy;
        uchar *maxp = dptr + dbpl;
        if (depth != 1) {
            switch (depth) {
                case 8:                                // 8 bpp transform
                while (dptr < maxp) {
                    if (trigx < maxws && trigy < maxhs)
                        *dptr = *(sptr+sbpl*(trigy>>12)+(trigx>>12));
                    trigx += m11;
                    trigy += m12;
                    dptr++;
                }
                break;

                case 16:                        // 16 bpp transform
                while (dptr < maxp) {
                    if (trigx < maxws && trigy < maxhs)
                        *((ushort*)dptr) = *((const ushort *)(sptr+sbpl*(trigy>>12) +
                                                     ((trigx>>12)<<1)));
                    trigx += m11;
                    trigy += m12;
                    dptr++;
                    dptr++;
                }
                break;

                case 24:                        // 24 bpp transform
                while (dptr < maxp) {
                    if (trigx < maxws && trigy < maxhs) {
                        const uchar *p2 = sptr+sbpl*(trigy>>12) + ((trigx>>12)*3);
                        dptr[0] = p2[0];
                        dptr[1] = p2[1];
                        dptr[2] = p2[2];
                    }
                    trigx += m11;
                    trigy += m12;
                    dptr += 3;
                }
                break;

                case 32:                        // 32 bpp transform
                while (dptr < maxp) {
                    if (trigx < maxws && trigy < maxhs)
                        *((uint*)dptr) = *((const uint *)(sptr+sbpl*(trigy>>12) +
                                                   ((trigx>>12)<<2)));
                    trigx += m11;
                    trigy += m12;
                    dptr += 4;
                }
                break;

                default: {
                return false;
                }
            }
        } else  {
            switch (type) {
                case QT_XFORM_TYPE_MSBFIRST:
                    while (dptr < maxp) {
                        IWX_MSB(128);
                        IWX_MSB(64);
                        IWX_MSB(32);
                        IWX_MSB(16);
                        IWX_MSB(8);
                        IWX_MSB(4);
                        IWX_MSB(2);
                        IWX_MSB(1);
                        dptr++;
                    }
                    break;
                case QT_XFORM_TYPE_LSBFIRST:
                    while (dptr < maxp) {
                        IWX_LSB(1);
                        IWX_LSB(2);
                        IWX_LSB(4);
                        IWX_LSB(8);
                        IWX_LSB(16);
                        IWX_LSB(32);
                        IWX_LSB(64);
                        IWX_LSB(128);
                        dptr++;
                    }
                    break;
            }
        }
        m21ydx += m21;
        m22ydy += m22;
        dptr += p_inc;
    }
    return true;
}
#undef IWX_MSB
#undef IWX_LSB
#undef IWX_PIX

/*! \fn int QImage::serialNumber() const
    \obsolete
    Returns a number that identifies the contents of this
    QImage object. Distinct QImage 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
    image is altered. This means that it may be dangerous to use
    it as a cache key.

    \sa operator==()
*/

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

    The key will change when the image is altered.
*/
qint64 QImage::cacheKey() const
{
    if (!d)
        return 0;
    else
        return (((qint64) d->ser_no) << 32) | ((qint64) d->detach_no);
}

/*!
    \internal

    Returns \c true if the image is detached; otherwise returns \c false.

    \sa detach(), {Implicit Data Sharing}
*/

bool QImage::isDetached() const
{
    return d && d->ref.load() == 1;
}


/*!
    \obsolete
    Sets the alpha channel of this image to the given \a alphaChannel.

    If \a alphaChannel is an 8 bit grayscale image, the intensity values are
    written into this buffer directly. Otherwise, \a alphaChannel is converted
    to 32 bit and the intensity of the RGB pixel values is used.

    Note that the image will be converted to the Format_ARGB32_Premultiplied
    format if the function succeeds.

    Use one of the composition modes in QPainter::CompositionMode instead.

    \warning This function is expensive.

    \sa alphaChannel(), {QImage#Image Transformations}{Image
    Transformations}, {QImage#Image Formats}{Image Formats}
*/

void QImage::setAlphaChannel(const QImage &alphaChannel)
{
    if (!d)
        return;

    int w = d->width;
    int h = d->height;

    if (w != alphaChannel.d->width || h != alphaChannel.d->height) {
        qWarning("QImage::setAlphaChannel: "
                 "Alpha channel must have same dimensions as the target image");
        return;
    }

    if (d->paintEngine && d->paintEngine->isActive()) {
        qWarning("QImage::setAlphaChannel: "
                 "Unable to set alpha channel while image is being painted on");
        return;
    }

    if (d->format == QImage::Format_ARGB32_Premultiplied)
        detach();
    else
        *this = convertToFormat(QImage::Format_ARGB32_Premultiplied);

    if (isNull())
        return;

    // Slight optimization since alphachannels are returned as 8-bit grays.
    if (alphaChannel.format() == QImage::Format_Alpha8 ||( alphaChannel.d->depth == 8 && alphaChannel.isGrayscale())) {
        const uchar *src_data = alphaChannel.d->data;
        uchar *dest_data = d->data;
        for (int y=0; y<h; ++y) {
            const uchar *src = src_data;
            QRgb *dest = (QRgb *)dest_data;
            for (int x=0; x<w; ++x) {
                int alpha = *src;
                int destAlpha = qt_div_255(alpha * qAlpha(*dest));
                *dest = ((destAlpha << 24)
                         | (qt_div_255(qRed(*dest) * alpha) << 16)
                         | (qt_div_255(qGreen(*dest) * alpha) << 8)
                         | (qt_div_255(qBlue(*dest) * alpha)));
                ++dest;
                ++src;
            }
            src_data += alphaChannel.d->bytes_per_line;
            dest_data += d->bytes_per_line;
        }

    } else {
        const QImage sourceImage = alphaChannel.convertToFormat(QImage::Format_RGB32);
        if (sourceImage.isNull())
            return;
        const uchar *src_data = sourceImage.d->data;
        uchar *dest_data = d->data;
        for (int y=0; y<h; ++y) {
            const QRgb *src = (const QRgb *) src_data;
            QRgb *dest = (QRgb *) dest_data;
            for (int x=0; x<w; ++x) {
                int alpha = qGray(*src);
                int destAlpha = qt_div_255(alpha * qAlpha(*dest));
                *dest = ((destAlpha << 24)
                         | (qt_div_255(qRed(*dest) * alpha) << 16)
                         | (qt_div_255(qGreen(*dest) * alpha) << 8)
                         | (qt_div_255(qBlue(*dest) * alpha)));
                ++dest;
                ++src;
            }
            src_data += sourceImage.d->bytes_per_line;
            dest_data += d->bytes_per_line;
        }
    }
}


/*!
    \obsolete

    Returns the alpha channel of the image as a new grayscale QImage in which
    each pixel's red, green, and blue values are given the alpha value of the
    original image. The color depth of the returned image is 8-bit.

    You can see an example of use of this function in QPixmap's
    \l{QPixmap::}{alphaChannel()}, which works in the same way as
    this function on QPixmaps.

    Most usecases for this function can be replaced with QPainter and
    using composition modes.

    Note this returns a color-indexed image if you want the alpha channel in
    the alpha8 format instead use convertToFormat(Format_Alpha8) on the source
    image.

    \warning This is an expensive function.

    \sa setAlphaChannel(), hasAlphaChannel(), convertToFormat(),
    {QPixmap#Pixmap Information}{Pixmap},
    {QImage#Image Transformations}{Image Transformations}
*/

QImage QImage::alphaChannel() const
{
    if (!d)
        return QImage();

    int w = d->width;
    int h = d->height;

    QImage image(w, h, Format_Indexed8);
    image.setColorCount(256);

    // set up gray scale table.
    for (int i=0; i<256; ++i)
        image.setColor(i, qRgb(i, i, i));

    if (!hasAlphaChannel()) {
        image.fill(255);
        return image;
    }

    if (d->format == Format_Indexed8) {
        const uchar *src_data = d->data;
        uchar *dest_data = image.d->data;
        for (int y=0; y<h; ++y) {
            const uchar *src = src_data;
            uchar *dest = dest_data;
            for (int x=0; x<w; ++x) {
                *dest = qAlpha(d->colortable.at(*src));
                ++dest;
                ++src;
            }
            src_data += d->bytes_per_line;
            dest_data += image.d->bytes_per_line;
        }
    } else if (d->format == Format_Alpha8) {
        const uchar *src_data = d->data;
        uchar *dest_data = image.d->data;
        memcpy(dest_data, src_data, d->bytes_per_line * h);
    } else {
        QImage alpha32 = *this;
        bool canSkipConversion = (d->format == Format_ARGB32 || d->format == Format_ARGB32_Premultiplied);
#if Q_BYTE_ORDER == Q_LITTLE_ENDIAN
        canSkipConversion = canSkipConversion || (d->format == Format_RGBA8888 || d->format == Format_RGBA8888_Premultiplied);
#endif
        if (!canSkipConversion)
            alpha32 = convertToFormat(Format_ARGB32);

        const uchar *src_data = alpha32.d->data;
        uchar *dest_data = image.d->data;
        for (int y=0; y<h; ++y) {
            const QRgb *src = (const QRgb *) src_data;
            uchar *dest = dest_data;
            for (int x=0; x<w; ++x) {
                *dest = qAlpha(*src);
                ++dest;
                ++src;
            }
            src_data += alpha32.d->bytes_per_line;
            dest_data += image.d->bytes_per_line;
        }
    }

    return image;
}

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

    \sa {QImage#Image Information}{Image Information}
*/
bool QImage::hasAlphaChannel() const
{
    if (!d)
        return false;
    const QPixelFormat format = pixelFormat();
    if (format.alphaUsage() == QPixelFormat::UsesAlpha)
        return true;
    if (format.colorModel() == QPixelFormat::Indexed)
        return d->has_alpha_clut;
    return false;
}

/*!
    \since 4.7
    Returns the number of bit planes in the image.

    The number of bit planes is the number of bits of color and
    transparency information for each pixel. This is different from
    (i.e. smaller than) the depth when the image format contains
    unused bits.

    \sa depth(), format(), {QImage#Image Formats}{Image Formats}
*/
int QImage::bitPlaneCount() const
{
    if (!d)
        return 0;
    int bpc = 0;
    switch (d->format) {
    case QImage::Format_Invalid:
        break;
    case QImage::Format_BGR30:
    case QImage::Format_RGB30:
        bpc = 30;
        break;
    case QImage::Format_RGB32:
    case QImage::Format_RGBX8888:
        bpc = 24;
        break;
    case QImage::Format_RGB666:
        bpc = 18;
        break;
    case QImage::Format_RGB555:
        bpc = 15;
        break;
    case QImage::Format_ARGB8555_Premultiplied:
        bpc = 23;
        break;
    case QImage::Format_RGB444:
        bpc = 12;
        break;
    default:
        bpc = qt_depthForFormat(d->format);
        break;
    }
    return bpc;
}

/*!
   Returns a smoothly scaled copy of the image. The returned image has a size
   of width \a w by height \a h pixels.
*/
QImage QImage::smoothScaled(int w, int h) const {
    QImage src = *this;
    switch (src.format()) {
    case QImage::Format_RGB32:
    case QImage::Format_ARGB32_Premultiplied:
#if Q_BYTE_ORDER == Q_LITTLE_ENDIAN
    case QImage::Format_RGBX8888:
#endif
    case QImage::Format_RGBA8888_Premultiplied:
        break;
    default:
        if (src.hasAlphaChannel())
            src = src.convertToFormat(QImage::Format_ARGB32_Premultiplied);
        else
            src = src.convertToFormat(QImage::Format_RGB32);
    }
    src = qSmoothScaleImage(src, w, h);
    if (!src.isNull())
        copyMetadata(src.d, d);
    return src;
}

static QImage rotated90(const QImage &image)
{
    QImage out(image.height(), image.width(), image.format());
    out.setDotsPerMeterX(image.dotsPerMeterY());
    out.setDotsPerMeterY(image.dotsPerMeterX());
    if (image.colorCount() > 0)
        out.setColorTable(image.colorTable());
    int w = image.width();
    int h = image.height();
    const MemRotateFunc memrotate = qMemRotateFunctions[qPixelLayouts[image.format()].bpp][2];
    if (memrotate) {
        memrotate(image.constBits(), w, h, image.bytesPerLine(), out.bits(), out.bytesPerLine());
    } else {
        for (int y=0; y<h; ++y) {
            if (image.colorCount())
                for (int x=0; x<w; ++x)
                    out.setPixel(h-y-1, x, image.pixelIndex(x, y));
            else
                for (int x=0; x<w; ++x)
                    out.setPixel(h-y-1, x, image.pixel(x, y));
        }
    }
    return out;
}

static QImage rotated180(const QImage &image)
{
    const MemRotateFunc memrotate = qMemRotateFunctions[qPixelLayouts[image.format()].bpp][1];
    if (!memrotate)
        return image.mirrored(true, true);

    QImage out(image.width(), image.height(), image.format());
    out.setDotsPerMeterX(image.dotsPerMeterY());
    out.setDotsPerMeterY(image.dotsPerMeterX());
    if (image.colorCount() > 0)
        out.setColorTable(image.colorTable());
    int w = image.width();
    int h = image.height();
    memrotate(image.constBits(), w, h, image.bytesPerLine(), out.bits(), out.bytesPerLine());
    return out;
}

static QImage rotated270(const QImage &image)
{
    QImage out(image.height(), image.width(), image.format());
    out.setDotsPerMeterX(image.dotsPerMeterY());
    out.setDotsPerMeterY(image.dotsPerMeterX());
    if (image.colorCount() > 0)
        out.setColorTable(image.colorTable());
    int w = image.width();
    int h = image.height();
    const MemRotateFunc memrotate = qMemRotateFunctions[qPixelLayouts[image.format()].bpp][0];
    if (memrotate) {
        memrotate(image.constBits(), w, h, image.bytesPerLine(), out.bits(), out.bytesPerLine());
    } else {
        for (int y=0; y<h; ++y) {
            if (image.colorCount())
                for (int x=0; x<w; ++x)
                    out.setPixel(y, w-x-1, image.pixelIndex(x, y));
            else
                for (int x=0; x<w; ++x)
                    out.setPixel(y, w-x-1, image.pixel(x, y));
        }
    }
    return out;
}

/*!
    Returns a copy of the image that is transformed using the given
    transformation \a matrix and transformation \a mode.

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

    Unlike the other overload, this function can be used to perform perspective
    transformations on images.

    \sa trueMatrix(), {QImage#Image Transformations}{Image
    Transformations}
*/

QImage QImage::transformed(const QTransform &matrix, Qt::TransformationMode mode ) const
{
    if (!d)
        return QImage();

    // source image data
    int ws = width();
    int hs = height();

    // target image data
    int wd;
    int hd;

    // compute size of target image
    QTransform mat = trueMatrix(matrix, ws, hs);
    bool complex_xform = false;
    bool scale_xform = false;
    if (mat.type() <= QTransform::TxScale) {
        if (mat.type() == QTransform::TxNone) // identity matrix
            return *this;
        else if (mat.m11() == -1. && mat.m22() == -1.)
            return rotated180(*this);

        if (mode == Qt::FastTransformation) {
            hd = qRound(qAbs(mat.m22()) * hs);
            wd = qRound(qAbs(mat.m11()) * ws);
        } else {
            hd = int(qAbs(mat.m22()) * hs + 0.9999);
            wd = int(qAbs(mat.m11()) * ws + 0.9999);
        }
        scale_xform = true;
    } else {
        if (mat.type() <= QTransform::TxRotate && mat.m11() == 0 && mat.m22() == 0) {
            if (mat.m12() == 1. && mat.m21() == -1.)
                return rotated90(*this);
            else if (mat.m12() == -1. && mat.m21() == 1.)
                return rotated270(*this);
        }

        QPolygonF a(QRectF(0, 0, ws, hs));
        a = mat.map(a);
        QRect r = a.boundingRect().toAlignedRect();
        wd = r.width();
        hd = r.height();
        complex_xform = true;
    }

    if (wd == 0 || hd == 0)
        return QImage();

    // Make use of the optimized algorithm when we're scaling
    if (scale_xform && mode == Qt::SmoothTransformation) {
        if (mat.m11() < 0.0F && mat.m22() < 0.0F) { // horizontal/vertical flip
            return smoothScaled(wd, hd).mirrored(true, true);
        } else if (mat.m11() < 0.0F) { // horizontal flip
            return smoothScaled(wd, hd).mirrored(true, false);
        } else if (mat.m22() < 0.0F) { // vertical flip
            return smoothScaled(wd, hd).mirrored(false, true);
        } else { // no flipping
            return smoothScaled(wd, hd);
        }
    }

    int bpp = depth();

    int sbpl = bytesPerLine();
    const uchar *sptr = bits();

    QImage::Format target_format = d->format;

    if (complex_xform || mode == Qt::SmoothTransformation) {
        if (d->format < QImage::Format_RGB32 || !hasAlphaChannel()) {
            target_format = qt_alphaVersion(d->format);
        }
    }

    QImage dImage(wd, hd, target_format);
    QIMAGE_SANITYCHECK_MEMORY(dImage);

    if (target_format == QImage::Format_MonoLSB
        || target_format == QImage::Format_Mono
        || target_format == QImage::Format_Indexed8) {
        dImage.d->colortable = d->colortable;
        dImage.d->has_alpha_clut = d->has_alpha_clut | complex_xform;
    }

    // initizialize the data
    if (target_format == QImage::Format_Indexed8) {
        if (dImage.d->colortable.size() < 256) {
            // colors are left in the color table, so pick that one as transparent
            dImage.d->colortable.append(0x0);
            memset(dImage.bits(), dImage.d->colortable.size() - 1, dImage.d->nbytes);
        } else {
            memset(dImage.bits(), 0, dImage.d->nbytes);
        }
    } else
        memset(dImage.bits(), 0x00, dImage.d->nbytes);

    if (target_format >= QImage::Format_RGB32) {
        // Prevent QPainter from applying devicePixelRatio corrections
        const QImage sImage = (devicePixelRatio() != 1) ? QImage(constBits(), width(), height(), format()) : *this;

        Q_ASSERT(sImage.devicePixelRatio() == 1);
        Q_ASSERT(sImage.devicePixelRatio() == dImage.devicePixelRatio());

        QPainter p(&dImage);
        if (mode == Qt::SmoothTransformation) {
            p.setRenderHint(QPainter::Antialiasing);
            p.setRenderHint(QPainter::SmoothPixmapTransform);
        }
        p.setTransform(mat);
        p.drawImage(QPoint(0, 0), sImage);
    } else {
        bool invertible;
        mat = mat.inverted(&invertible);                // invert matrix
        if (!invertible)        // error, return null image
            return QImage();

        // create target image (some of the code is from QImage::copy())
        int type = format() == Format_Mono ? QT_XFORM_TYPE_MSBFIRST : QT_XFORM_TYPE_LSBFIRST;
        int dbpl = dImage.bytesPerLine();
        qt_xForm_helper(mat, 0, type, bpp, dImage.bits(), dbpl, 0, hd, sptr, sbpl, ws, hs);
    }
    copyMetadata(dImage.d, d);

    return dImage;
}

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

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

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

    Unlike the other overload, this function creates transformation
    matrices that can be used to perform perspective
    transformations on images.

    \sa transformed(), {QImage#Image Transformations}{Image
    Transformations}
*/

QTransform QImage::trueMatrix(const QTransform &matrix, int w, int h)
{
    const QRectF rect(0, 0, w, h);
    const QRect mapped = matrix.mapRect(rect).toAlignedRect();
    const QPoint delta = mapped.topLeft();
    return matrix * QTransform().translate(-delta.x(), -delta.y());
}

bool QImageData::convertInPlace(QImage::Format newFormat, Qt::ImageConversionFlags flags)
{
    if (format == newFormat)
        return true;

    // No in-place conversion if we have to detach
    if (ref.load() > 1 || !own_data)
        return false;

    InPlace_Image_Converter converter = qimage_inplace_converter_map[format][newFormat];
    if (converter)
        return converter(this, flags);
    else if (format > QImage::Format_Indexed8 && newFormat > QImage::Format_Indexed8 && !qimage_converter_map[format][newFormat])
        // Convert inplace generic, but only if there are no direct converters,
        // any direct ones are probably better even if not inplace.
        return convert_generic_inplace(this, newFormat, flags);
    else
        return false;
}

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

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

#ifndef QT_NO_DEBUG_STREAM
QDebug operator<<(QDebug dbg, const QImage &i)
{
    QDebugStateSaver saver(dbg);
    dbg.resetFormat();
    dbg.nospace();
    dbg << "QImage(";
    if (i.isNull()) {
        dbg << "null";
    } else {
        dbg << i.size() << ",format=" << i.format() << ",depth=" << i.depth();
        if (i.colorCount())
            dbg << ",colorCount=" << i.colorCount();
        dbg << ",devicePixelRatio=" << i.devicePixelRatio()
            << ",bytesPerLine=" << i.bytesPerLine() << ",sizeInBytes=" << i.sizeInBytes();
    }
    dbg << ')';
    return dbg;
}
#endif

/*!
    \fn void QImage::setNumColors(int n)
    \obsolete

    Resizes the color table to contain \a n entries.

    \sa setColorCount()
 */

/*!
    \fn int QImage::numBytes() const
    \obsolete

    Returns the number of bytes occupied by the image data.

    \sa sizeInBytes()
 */

/*!
    \fn QStringList QImage::textLanguages() const
    \obsolete

    Returns the language identifiers for which some texts are recorded.
    Note that if you want to iterate over the list, you should iterate over a copy.

    The language the text is recorded in is no longer relevant since the text is
    always set using QString and UTF-8 representation.

    \sa textKeys()
 */

/*!
    \fn QList<QImageTextKeyLang> QImage::textList() const
    \obsolete

    Returns a list of QImageTextKeyLang objects that enumerate all the texts
    key/language pairs set for this image.

    The language the text is recorded in is no longer relevant since the text
    is always set using QString and UTF-8 representation.

    \sa textKeys()
 */

static Q_CONSTEXPR QPixelFormat pixelformats[] = {
        //QImage::Format_Invalid:
        QPixelFormat(),
        //QImage::Format_Mono:
        QPixelFormat(QPixelFormat::Indexed,
                        /*RED*/            1,
                        /*GREEN*/          0,
                        /*BLUE*/           0,
                        /*FOURTH*/         0,
                        /*FIFTH*/          0,
                        /*ALPHA*/          0,
                        /*ALPHA USAGE*/    QPixelFormat::IgnoresAlpha,
                        /*ALPHA POSITION*/ QPixelFormat::AtBeginning,
                        /*PREMULTIPLIED*/  QPixelFormat::NotPremultiplied,
                        /*INTERPRETATION*/ QPixelFormat::UnsignedByte,
                        /*BYTE ORDER*/     QPixelFormat::CurrentSystemEndian),
        //QImage::Format_MonoLSB:
        QPixelFormat(QPixelFormat::Indexed,
                        /*RED*/            1,
                        /*GREEN*/          0,
                        /*BLUE*/           0,
                        /*FOURTH*/         0,
                        /*FIFTH*/          0,
                        /*ALPHA*/          0,
                        /*ALPHA USAGE*/    QPixelFormat::IgnoresAlpha,
                        /*ALPHA POSITION*/ QPixelFormat::AtBeginning,
                        /*PREMULTIPLIED*/  QPixelFormat::NotPremultiplied,
                        /*INTERPRETATION*/ QPixelFormat::UnsignedByte,
                        /*BYTE ORDER*/     QPixelFormat::CurrentSystemEndian),
        //QImage::Format_Indexed8:
         QPixelFormat(QPixelFormat::Indexed,
                        /*RED*/            8,
                        /*GREEN*/          0,
                        /*BLUE*/           0,
                        /*FOURTH*/         0,
                        /*FIFTH*/          0,
                        /*ALPHA*/          0,
                        /*ALPHA USAGE*/    QPixelFormat::IgnoresAlpha,
                        /*ALPHA POSITION*/ QPixelFormat::AtBeginning,
                        /*PREMULTIPLIED*/  QPixelFormat::NotPremultiplied,
                        /*INTERPRETATION*/ QPixelFormat::UnsignedByte,
                        /*BYTE ORDER*/     QPixelFormat::CurrentSystemEndian),
        //QImage::Format_RGB32:
         QPixelFormat(QPixelFormat::RGB,
                     /*RED*/                8,
                     /*GREEN*/              8,
                     /*BLUE*/               8,
                     /*FOURTH*/             0,
                     /*FIFTH*/              0,
                     /*ALPHA*/              8,
                     /*ALPHA USAGE*/       QPixelFormat::IgnoresAlpha,
                     /*ALPHA POSITION*/    QPixelFormat::AtBeginning,
                     /*PREMULTIPLIED*/     QPixelFormat::NotPremultiplied,
                     /*INTERPRETATION*/    QPixelFormat::UnsignedInteger,
                     /*BYTE ORDER*/        QPixelFormat::CurrentSystemEndian),
        //QImage::Format_ARGB32:
         QPixelFormat(QPixelFormat::RGB,
                     /*RED*/                8,
                     /*GREEN*/              8,
                     /*BLUE*/               8,
                     /*FOURTH*/             0,
                     /*FIFTH*/              0,
                     /*ALPHA*/              8,
                     /*ALPHA USAGE*/       QPixelFormat::UsesAlpha,
                     /*ALPHA POSITION*/    QPixelFormat::AtBeginning,
                     /*PREMULTIPLIED*/     QPixelFormat::NotPremultiplied,
                     /*INTERPRETATION*/    QPixelFormat::UnsignedInteger,
                     /*BYTE ORDER*/        QPixelFormat::CurrentSystemEndian),
        //QImage::Format_ARGB32_Premultiplied:
         QPixelFormat(QPixelFormat::RGB,
                     /*RED*/                8,
                     /*GREEN*/              8,
                     /*BLUE*/               8,
                     /*FOURTH*/             0,
                     /*FIFTH*/              0,
                     /*ALPHA*/              8,
                     /*ALPHA USAGE*/       QPixelFormat::UsesAlpha,
                     /*ALPHA POSITION*/    QPixelFormat::AtBeginning,
                     /*PREMULTIPLIED*/     QPixelFormat::Premultiplied,
                     /*INTERPRETATION*/    QPixelFormat::UnsignedInteger,
                     /*BYTE ORDER*/        QPixelFormat::CurrentSystemEndian),
        //QImage::Format_RGB16:
         QPixelFormat(QPixelFormat::RGB,
                     /*RED*/                5,
                     /*GREEN*/              6,
                     /*BLUE*/               5,
                     /*FOURTH*/             0,
                     /*FIFTH*/              0,
                     /*ALPHA*/              0,
                     /*ALPHA USAGE*/       QPixelFormat::IgnoresAlpha,
                     /*ALPHA POSITION*/    QPixelFormat::AtBeginning,
                     /*PREMULTIPLIED*/     QPixelFormat::NotPremultiplied,
                     /*INTERPRETATION*/    QPixelFormat::UnsignedShort,
                     /*BYTE ORDER*/        QPixelFormat::CurrentSystemEndian),
        //QImage::Format_ARGB8565_Premultiplied:
         QPixelFormat(QPixelFormat::RGB,
                     /*RED*/                5,
                     /*GREEN*/              6,
                     /*BLUE*/               5,
                     /*FOURTH*/             0,
                     /*FIFTH*/              0,
                     /*ALPHA*/              8,
                     /*ALPHA USAGE*/       QPixelFormat::UsesAlpha,
                     /*ALPHA POSITION*/    QPixelFormat::AtBeginning,
                     /*PREMULTIPLIED*/     QPixelFormat::Premultiplied,
                     /*INTERPRETATION*/    QPixelFormat::UnsignedInteger,
                     /*BYTE ORDER*/        QPixelFormat::CurrentSystemEndian),
        //QImage::Format_RGB666:
         QPixelFormat(QPixelFormat::RGB,
                     /*RED*/                6,
                     /*GREEN*/              6,
                     /*BLUE*/               6,
                     /*FOURTH*/             0,
                     /*FIFTH*/              0,
                     /*ALPHA*/              0,
                     /*ALPHA USAGE*/       QPixelFormat::IgnoresAlpha,
                     /*ALPHA POSITION*/    QPixelFormat::AtBeginning,
                     /*PREMULTIPLIED*/     QPixelFormat::NotPremultiplied,
                     /*INTERPRETATION*/    QPixelFormat::UnsignedInteger,
                     /*BYTE ORDER*/        QPixelFormat::CurrentSystemEndian),
        //QImage::Format_ARGB6666_Premultiplied:
         QPixelFormat(QPixelFormat::RGB,
                     /*RED*/                6,
                     /*GREEN*/              6,
                     /*BLUE*/               6,
                     /*FOURTH*/             0,
                     /*FIFTH*/              0,
                     /*ALPHA*/              6,
                     /*ALPHA USAGE*/       QPixelFormat::UsesAlpha,
                     /*ALPHA POSITION*/    QPixelFormat::AtEnd,
                     /*PREMULTIPLIED*/     QPixelFormat::Premultiplied,
                     /*INTERPRETATION*/    QPixelFormat::UnsignedInteger,
                     /*BYTE ORDER*/        QPixelFormat::CurrentSystemEndian),
        //QImage::Format_RGB555:
         QPixelFormat(QPixelFormat::RGB,
                     /*RED*/                5,
                     /*GREEN*/              5,
                     /*BLUE*/               5,
                     /*FOURTH*/             0,
                     /*FIFTH*/              0,
                     /*ALPHA*/              0,
                     /*ALPHA USAGE*/       QPixelFormat::IgnoresAlpha,
                     /*ALPHA POSITION*/    QPixelFormat::AtBeginning,
                     /*PREMULTIPLIED*/     QPixelFormat::NotPremultiplied,
                     /*INTERPRETATION*/    QPixelFormat::UnsignedShort,
                     /*BYTE ORDER*/        QPixelFormat::CurrentSystemEndian),
        //QImage::Format_ARGB8555_Premultiplied:
         QPixelFormat(QPixelFormat::RGB,
                     /*RED*/                5,
                     /*GREEN*/              5,
                     /*BLUE*/               5,
                     /*FOURTH*/             0,
                     /*FIFTH*/              0,
                     /*ALPHA*/              8,
                     /*ALPHA USAGE*/       QPixelFormat::UsesAlpha,
                     /*ALPHA POSITION*/    QPixelFormat::AtBeginning,
                     /*PREMULTIPLIED*/     QPixelFormat::Premultiplied,
                     /*INTERPRETATION*/    QPixelFormat::UnsignedInteger,
                     /*BYTE ORDER*/        QPixelFormat::CurrentSystemEndian),
        //QImage::Format_RGB888:
         QPixelFormat(QPixelFormat::RGB,
                     /*RED*/                8,
                     /*GREEN*/              8,
                     /*BLUE*/               8,
                     /*FOURTH*/             0,
                     /*FIFTH*/              0,
                     /*ALPHA*/              0,
                     /*ALPHA USAGE*/       QPixelFormat::IgnoresAlpha,
                     /*ALPHA POSITION*/    QPixelFormat::AtBeginning,
                     /*PREMULTIPLIED*/     QPixelFormat::NotPremultiplied,
                     /*INTERPRETATION*/    QPixelFormat::UnsignedByte,
                     /*BYTE ORDER*/        QPixelFormat::CurrentSystemEndian),
        //QImage::Format_RGB444:
         QPixelFormat(QPixelFormat::RGB,
                     /*RED*/                4,
                     /*GREEN*/              4,
                     /*BLUE*/               4,
                     /*FOURTH*/             0,
                     /*FIFTH*/              0,
                     /*ALPHA*/              0,
                     /*ALPHA USAGE*/       QPixelFormat::IgnoresAlpha,
                     /*ALPHA POSITION*/    QPixelFormat::AtBeginning,
                     /*PREMULTIPLIED*/     QPixelFormat::NotPremultiplied,
                     /*INTERPRETATION*/    QPixelFormat::UnsignedShort,
                     /*BYTE ORDER*/        QPixelFormat::CurrentSystemEndian),
        //QImage::Format_ARGB4444_Premultiplied:
         QPixelFormat(QPixelFormat::RGB,
                     /*RED*/                4,
                     /*GREEN*/              4,
                     /*BLUE*/               4,
                     /*FOURTH*/             0,
                     /*FIFTH*/              0,
                     /*ALPHA*/              4,
                     /*ALPHA USAGE*/       QPixelFormat::UsesAlpha,
                     /*ALPHA POSITION*/    QPixelFormat::AtEnd,
                     /*PREMULTIPLIED*/     QPixelFormat::Premultiplied,
                     /*INTERPRETATION*/    QPixelFormat::UnsignedShort,
                     /*BYTE ORDER*/        QPixelFormat::CurrentSystemEndian),
        //QImage::Format_RGBX8888:
         QPixelFormat(QPixelFormat::RGB,
                     /*RED*/                8,
                     /*GREEN*/              8,
                     /*BLUE*/               8,
                     /*FOURTH*/             0,
                     /*FIFTH*/              0,
                     /*ALPHA*/              8,
                     /*ALPHA USAGE*/       QPixelFormat::IgnoresAlpha,
                     /*ALPHA POSITION*/    QPixelFormat::AtEnd,
                     /*PREMULTIPLIED*/     QPixelFormat::NotPremultiplied,
                     /*INTERPRETATION*/    QPixelFormat::UnsignedByte,
                     /*BYTE ORDER*/        QPixelFormat::CurrentSystemEndian),
        //QImage::Format_RGBA8888:
         QPixelFormat(QPixelFormat::RGB,
                     /*RED*/                8,
                     /*GREEN*/              8,
                     /*BLUE*/               8,
                     /*FOURTH*/             0,
                     /*FIFTH*/              0,
                     /*ALPHA*/              8,
                     /*ALPHA USAGE*/       QPixelFormat::UsesAlpha,
                     /*ALPHA POSITION*/    QPixelFormat::AtEnd,
                     /*PREMULTIPLIED*/     QPixelFormat::NotPremultiplied,
                     /*INTERPRETATION*/    QPixelFormat::UnsignedByte,
                     /*BYTE ORDER*/        QPixelFormat::CurrentSystemEndian),
        //QImage::Format_RGBA8888_Premultiplied:
         QPixelFormat(QPixelFormat::RGB,
                     /*RED*/                8,
                     /*GREEN*/              8,
                     /*BLUE*/               8,
                     /*FOURTH*/             0,
                     /*FIFTH*/              0,
                     /*ALPHA*/              8,
                     /*ALPHA USAGE*/       QPixelFormat::UsesAlpha,
                     /*ALPHA POSITION*/    QPixelFormat::AtEnd,
                     /*PREMULTIPLIED*/     QPixelFormat::Premultiplied,
                     /*INTERPRETATION*/    QPixelFormat::UnsignedByte,
                     /*BYTE ORDER*/        QPixelFormat::CurrentSystemEndian),
        //QImage::Format_BGR30:
         QPixelFormat(QPixelFormat::BGR,
                     /*RED*/                10,
                     /*GREEN*/              10,
                     /*BLUE*/               10,
                     /*FOURTH*/             0,
                     /*FIFTH*/              0,
                     /*ALPHA*/              2,
                     /*ALPHA USAGE*/       QPixelFormat::IgnoresAlpha,
                     /*ALPHA POSITION*/    QPixelFormat::AtBeginning,
                     /*PREMULTIPLIED*/     QPixelFormat::NotPremultiplied,
                     /*INTERPRETATION*/    QPixelFormat::UnsignedInteger,
                     /*BYTE ORDER*/        QPixelFormat::CurrentSystemEndian),
        //QImage::Format_A2BGR30_Premultiplied:
         QPixelFormat(QPixelFormat::BGR,
                     /*RED*/                10,
                     /*GREEN*/              10,
                     /*BLUE*/               10,
                     /*FOURTH*/             0,
                     /*FIFTH*/              0,
                     /*ALPHA*/              2,
                     /*ALPHA USAGE*/       QPixelFormat::UsesAlpha,
                     /*ALPHA POSITION*/    QPixelFormat::AtBeginning,
                     /*PREMULTIPLIED*/     QPixelFormat::Premultiplied,
                     /*INTERPRETATION*/    QPixelFormat::UnsignedInteger,
                     /*BYTE ORDER*/        QPixelFormat::CurrentSystemEndian),
        //QImage::Format_RGB30:
         QPixelFormat(QPixelFormat::RGB,
                     /*RED*/                10,
                     /*GREEN*/              10,
                     /*BLUE*/               10,
                     /*FOURTH*/             0,
                     /*FIFTH*/              0,
                     /*ALPHA*/              2,
                     /*ALPHA USAGE*/       QPixelFormat::IgnoresAlpha,
                     /*ALPHA POSITION*/    QPixelFormat::AtBeginning,
                     /*PREMULTIPLIED*/     QPixelFormat::NotPremultiplied,
                     /*INTERPRETATION*/    QPixelFormat::UnsignedInteger,
                     /*BYTE ORDER*/        QPixelFormat::CurrentSystemEndian),
        //QImage::Format_A2RGB30_Premultiplied:
         QPixelFormat(QPixelFormat::RGB,
                     /*RED*/                10,
                     /*GREEN*/              10,
                     /*BLUE*/               10,
                     /*FOURTH*/             0,
                     /*FIFTH*/              0,
                     /*ALPHA*/              2,
                     /*ALPHA USAGE*/       QPixelFormat::UsesAlpha,
                     /*ALPHA POSITION*/    QPixelFormat::AtBeginning,
                     /*PREMULTIPLIED*/     QPixelFormat::Premultiplied,
                     /*INTERPRETATION*/    QPixelFormat::UnsignedInteger,
                     /*BYTE ORDER*/        QPixelFormat::CurrentSystemEndian),
        //QImage::Format_Alpha8:
        QPixelFormat(QPixelFormat::Alpha,
                    /*First*/              0,
                    /*SECOND*/             0,
                    /*THIRD*/              0,
                    /*FOURTH*/             0,
                    /*FIFTH*/              0,
                    /*ALPHA*/              8,
                    /*ALPHA USAGE*/       QPixelFormat::UsesAlpha,
                    /*ALPHA POSITION*/    QPixelFormat::AtBeginning,
                    /*PREMULTIPLIED*/     QPixelFormat::Premultiplied,
                    /*INTERPRETATION*/    QPixelFormat::UnsignedByte,
                    /*BYTE ORDER*/        QPixelFormat::CurrentSystemEndian),
        //QImage::Format_Grayscale8:
        QPixelFormat(QPixelFormat::Grayscale,
                    /*GRAY*/               8,
                    /*SECOND*/             0,
                    /*THIRD*/              0,
                    /*FOURTH*/             0,
                    /*FIFTH*/              0,
                    /*ALPHA*/              0,
                    /*ALPHA USAGE*/       QPixelFormat::IgnoresAlpha,
                    /*ALPHA POSITION*/    QPixelFormat::AtBeginning,
                    /*PREMULTIPLIED*/     QPixelFormat::NotPremultiplied,
                    /*INTERPRETATION*/    QPixelFormat::UnsignedByte,
                    /*BYTE ORDER*/        QPixelFormat::CurrentSystemEndian),
};
Q_STATIC_ASSERT(sizeof(pixelformats) / sizeof(*pixelformats) == QImage::NImageFormats);

/*!
    Returns the QImage::Format as a QPixelFormat
*/
QPixelFormat QImage::pixelFormat() const Q_DECL_NOTHROW
{
    return toPixelFormat(format());
}

/*!
    Converts \a format into a QPixelFormat
*/
QPixelFormat QImage::toPixelFormat(QImage::Format format) Q_DECL_NOTHROW
{
    Q_ASSERT(static_cast<int>(format) < NImageFormats);
    return pixelformats[format];
}

/*!
    Converts \a format into a QImage::Format
*/
QImage::Format QImage::toImageFormat(QPixelFormat format) Q_DECL_NOTHROW
{
    for (int i = 0; i < NImageFormats; i++) {
        if (format == pixelformats[i])
            return Format(i);
    }
    return Format_Invalid;
}

Q_GUI_EXPORT void qt_imageTransform(QImage &src, QImageIOHandler::Transformations orient)
{
    if (orient == QImageIOHandler::TransformationNone)
        return;
    if (orient == QImageIOHandler::TransformationRotate270) {
        src = rotated270(src);
    } else {
        src = qMove(src).mirrored(orient & QImageIOHandler::TransformationMirror,
                                  orient & QImageIOHandler::TransformationFlip);
        if (orient & QImageIOHandler::TransformationRotate90)
            src = rotated90(src);
    }
}

QMap<QString, QString> qt_getImageText(const QImage &image, const QString &description)
{
    QMap<QString, QString> text = qt_getImageTextFromDescription(description);
    const auto textKeys = image.textKeys();
    for (const QString &key : textKeys) {
        if (!key.isEmpty() && !text.contains(key))
            text.insert(key, image.text(key));
    }
    return text;
}

QMap<QString, QString> qt_getImageTextFromDescription(const QString &description)
{
    QMap<QString, QString> text;
    const auto pairs = description.splitRef(QLatin1String("\n\n"));
    for (const QStringRef &pair : pairs) {
        int index = pair.indexOf(QLatin1Char(':'));
        if (index >= 0 && pair.indexOf(QLatin1Char(' ')) < index) {
            if (!pair.trimmed().isEmpty())
                text.insert(QLatin1String("Description"), pair.toString().simplified());
        } else {
            const QStringRef key = pair.left(index);
            if (!key.trimmed().isEmpty())
                text.insert(key.toString(), pair.mid(index + 2).toString().simplified());
        }
    }
    return text;
}

QT_END_NAMESPACE