summaryrefslogtreecommitdiff
path: root/src/newgrf.cpp
blob: 2e4e01eb8f7ac63dc690daf027f49424f843496d (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
/* $Id$ */

/** @file newgrf.cpp */

#include "stdafx.h"

#include <stdarg.h>

#include "openttd.h"
#include "debug.h"
#include "gfx.h"
#include "fileio.h"
#include "functions.h"
#include "engine.h"
#include "spritecache.h"
#include "station.h"
#include "sprite.h"
#include "newgrf.h"
#include "variables.h"
#include "string.h"
#include "table/strings.h"
#include "bridge.h"
#include "town.h"
#include "economy.h"
#include "newgrf_engine.h"
#include "vehicle.h"
#include "newgrf_text.h"
#include "table/sprites.h"
#include "fontcache.h"
#include "date.h"
#include "currency.h"
#include "landscape.h"
#include "sound.h"
#include "newgrf_config.h"
#include "newgrf_house.h"
#include "newgrf_sound.h"
#include "newgrf_spritegroup.h"
#include "helpers.hpp"
#include "table/town_land.h"
#include "cargotype.h"
#include "industry.h"
#include "newgrf_canal.h"
#include "newgrf_commons.h"

/* TTDPatch extended GRF format codec
 * (c) Petr Baudis 2004 (GPL'd)
 * Changes by Florian octo Forster are (c) by the OpenTTD development team.
 *
 * Contains portions of documentation by TTDPatch team.
 * Thanks especially to Josef Drexler for the documentation as well as a lot
 * of help at #tycoon. Also thanks to Michael Blunck for is GRF files which
 * served as subject to the initial testing of this codec. */


static int _skip_sprites; // XXX
static uint _file_index; // XXX
SpriteID _signal_base;
SpriteID _coast_base;

static GRFFile *_cur_grffile;
GRFFile *_first_grffile;
static SpriteID _cur_spriteid;
static GrfLoadingStage _cur_stage;
static uint32 _nfo_line;

static GRFConfig *_cur_grfconfig;

/* Miscellaneous GRF features, set by Action 0x0D, parameter 0x9E */
static byte _misc_grf_features = 0;

/* 32 * 8 = 256 flags. Apparently TTDPatch uses this many.. */
static uint32 _ttdpatch_flags[8];

/* Used by Action 0x06 to preload a pseudo sprite and modify its content */
static byte *_preload_sprite = NULL;

/* Indicates which are the newgrf features currently loaded ingame */
uint8 _loaded_newgrf_features;

enum GrfDataType {
	GDT_SOUND,
};

static byte _grf_data_blocks;
static GrfDataType _grf_data_type;


enum grfspec_feature {
	GSF_TRAIN,
	GSF_ROAD,
	GSF_SHIP,
	GSF_AIRCRAFT,
	GSF_STATION,
	GSF_CANAL,
	GSF_BRIDGE,
	GSF_TOWNHOUSE,
	GSF_GLOBALVAR,
	GSF_INDUSTRYTILES,
	GSF_INDUSTRIES,
	GSF_CARGOS,
	GSF_SOUNDFX,
};


typedef void (*SpecialSpriteHandler)(byte *buf, int len);

static const uint _vehcounts[4] = {
	/* GSF_TRAIN */    NUM_TRAIN_ENGINES,
	/* GSF_ROAD */     NUM_ROAD_ENGINES,
	/* GSF_SHIP */     NUM_SHIP_ENGINES,
	/* GSF_AIRCRAFT */ NUM_AIRCRAFT_ENGINES
};

static const uint _vehshifts[4] = {
	/* GSF_TRAIN */    0,
	/* GSF_ROAD */     ROAD_ENGINES_INDEX,
	/* GSF_SHIP */     SHIP_ENGINES_INDEX,
	/* GSF_AIRCRAFT */ AIRCRAFT_ENGINES_INDEX,
};

enum {
	MAX_STATIONS = 256,
};

static uint16 cargo_allowed[TOTAL_NUM_ENGINES];
static uint16 cargo_disallowed[TOTAL_NUM_ENGINES];

/* Contains the GRF ID of the owner of a vehicle if it has been reserved */
static uint32 _grm_engines[TOTAL_NUM_ENGINES];

/** DEBUG() function dedicated to newGRF debugging messages
 * Function is essentialy the same as DEBUG(grf, severity, ...) with the
 * addition of file:line information when parsing grf files.
 * NOTE: for the above reason(s) grfmsg() should ONLY be used for
 * loading/parsing grf files, not for runtime debug messages as there
 * is no file information available during that time.
 * @param severity debugging severity level, see debug.h
 * @param str message in printf() format */
void CDECL grfmsg(int severity, const char *str, ...)
{
	char buf[1024];
	va_list va;

	va_start(va, str);
	vsnprintf(buf, sizeof(buf), str, va);
	va_end(va);

	DEBUG(grf, severity, "[%s:%d] %s", _cur_grfconfig->filename, _nfo_line, buf);
}

static inline bool check_length(int real, int wanted, const char *str)
{
	if (real >= wanted) return true;
	grfmsg(0, "%s: Invalid pseudo sprite length %d (expected %d)!", str, real, wanted);
	return false;
}

static inline byte grf_load_byte(byte **buf)
{
	return *(*buf)++;
}

static uint16 grf_load_word(byte **buf)
{
	uint16 val = grf_load_byte(buf);
	return val | (grf_load_byte(buf) << 8);
}

static uint16 grf_load_extended(byte** buf)
{
	uint16 val;
	val = grf_load_byte(buf);
	if (val == 0xFF) val = grf_load_word(buf);
	return val;
}

static uint32 grf_load_dword(byte **buf)
{
	uint32 val = grf_load_word(buf);
	return val | (grf_load_word(buf) << 16);
}

static uint32 grf_load_var(byte size, byte **buf)
{
	switch (size) {
		case 1: return grf_load_byte(buf);
		case 2: return grf_load_word(buf);
		case 4: return grf_load_dword(buf);
		default:
			NOT_REACHED();
			return 0;
	}
}

static const char *grf_load_string(byte **buf, size_t max_len)
{
	const char *string   = *(const char **)buf;
	size_t string_length = ttd_strnlen(string, max_len);

	if (string_length == max_len) {
		/* String was not NUL terminated, so make sure it is now. */
		(*buf)[string_length - 1] = '\0';
		grfmsg(7, "String was not terminated with a zero byte.");
	} else {
		/* Increase the string length to include the NUL byte. */
		string_length++;
	}
	*buf += string_length;

	return string;
}

static GRFFile *GetFileByGRFID(uint32 grfid)
{
	GRFFile *file;

	for (file = _first_grffile; file != NULL; file = file->next) {
		if (file->grfid == grfid) break;
	}
	return file;
}

static GRFFile *GetFileByFilename(const char *filename)
{
	GRFFile *file;

	for (file = _first_grffile; file != NULL; file = file->next) {
		if (strcmp(file->filename, filename) == 0) break;
	}
	return file;
}


/** Used when setting an object's property to map to the GRF's strings
 * while taking in consideration the "drift" between TTDPatch string system and OpenTTD's one
 * @param grfid Id of the grf file
 * @param str StringID that we want to have the equivalent in OoenTTD
 * @return the properly adjusted StringID
 */
static StringID MapGRFStringID(uint32 grfid, StringID str)
{
	/* 0xD0 and 0xDC stand for all the TextIDs in the range
	 * of 0xD000 (misc graphics texts) and 0xDC00 (misc persistent texts).
	 * These strings are unique to each grf file, and thus require to be used with the
	 * grfid in which they are declared */
	if (GB(str, 8, 8) == 0xD0 || GB(str, 8, 8) == 0xDC) {
		return GetGRFStringID(grfid, str);
	}

	/* We have some changes in our cargo strings, resulting in some missing. */
	if (str >= 0x006E && str <= 0x008D) return str - 0x20;
	if (str >= 0x008E && str <= 0x00AD) return str - 0x20;

	/* Map building names according to our lang file changes
	 * 0x200F = Tall Office Block, first house name in the original data, the one that TTDPatch stil uses
	 * 0x201F = Old houses is the last house name.
	 * OpenTTD does not have exactly the same order aymore, so, the code below allows
	 * to compensate for the difference */
	if (str >= 0x200F && str <= 0x201F) return str + (STR_200F_TALL_OFFICE_BLOCK - 0x200F);

	return str;
}

static uint8 MapDOSColour(uint8 colour)
{
	if (_use_dos_palette) return colour;

	if (colour < 10) {
		static uint8 dos_to_win_colour_map[] = { 0, 215, 216, 136, 88, 106, 32, 33, 40, 245 };
		return dos_to_win_colour_map[colour];
	}

	if (colour >= 245 && colour < 254) return colour - 28;

	return colour;
}


typedef bool (*VCI_Handler)(uint engine, int numinfo, int prop, byte **buf, int len);

#define FOR_EACH_OBJECT for (i = 0; i < numinfo; i++)

static void dewagonize(int condition, int engine)
{
	EngineInfo *ei = &_engine_info[engine];
	RailVehicleInfo *rvi = &_rail_vehicle_info[engine];

	if (condition != 0) {
		ei->unk2 &= ~0x80;
		if (rvi->railveh_type == RAILVEH_WAGON)
			rvi->railveh_type = RAILVEH_SINGLEHEAD;
	} else {
		ei->unk2 |= 0x80;
		rvi->railveh_type = RAILVEH_WAGON;
	}
}

static bool RailVehicleChangeInfo(uint engine, int numinfo, int prop, byte **bufp, int len)
{
	EngineInfo *ei = &_engine_info[engine];
	RailVehicleInfo *rvi = &_rail_vehicle_info[engine];
	byte *buf = *bufp;
	int i;
	bool ret = false;

	switch (prop) {
		case 0x05: // Track type
			FOR_EACH_OBJECT {
				uint8 tracktype = grf_load_byte(&buf);

				switch (tracktype) {
					case 0: rvi[i].railtype = rvi[i].engclass >= 2 ? RAILTYPE_ELECTRIC : RAILTYPE_RAIL; break;
					case 1: rvi[i].railtype = RAILTYPE_MONO; break;
					case 2: rvi[i].railtype = RAILTYPE_MAGLEV; break;
					default:
						grfmsg(1, "RailVehicleChangeInfo: Invalid track type %d specified, ignoring", tracktype);
						break;
				}
			}
			break;

		case 0x08: // AI passenger service
			/* @todo missing feature */
			FOR_EACH_OBJECT grf_load_byte(&buf);
			ret = true;
			break;

		case 0x09: // Speed (1 unit is 1 kmh)
			FOR_EACH_OBJECT {
				uint16 speed = grf_load_word(&buf);
				if (speed == 0xFFFF) speed = 0;

				rvi[i].max_speed = speed;
			}
			break;

		case 0x0B: // Power
			FOR_EACH_OBJECT {
				uint16 power = grf_load_word(&buf);

				if (rvi[i].railveh_type == RAILVEH_MULTIHEAD) power /= 2;

				rvi[i].power = power;
				dewagonize(power, engine + i);
			}
			break;

		case 0x0D: // Running cost factor
			FOR_EACH_OBJECT {
				uint8 runcostfact = grf_load_byte(&buf);

				if (rvi[i].railveh_type == RAILVEH_MULTIHEAD) runcostfact /= 2;

				rvi[i].running_cost_base = runcostfact;
			}
			break;

		case 0x0E: // Running cost base
			FOR_EACH_OBJECT {
				uint32 base = grf_load_dword(&buf);

				switch (base) {
					case 0x4C30: rvi[i].running_cost_class = 0; break;
					case 0x4C36: rvi[i].running_cost_class = 1; break;
					case 0x4C3C: rvi[i].running_cost_class = 2; break;
					case 0: break; // Used by wagons
					default:
						grfmsg(1, "RailVehicleChangeInfo: Unsupported running cost base 0x%04X, ignoring", base);
						break;
				}
			}
			break;

		case 0x12: // Sprite ID
			FOR_EACH_OBJECT {
				uint8 spriteid = grf_load_byte(&buf);

				/* TTD sprite IDs point to a location in a 16bit array, but we use it
				 * as an array index, so we need it to be half the original value. */
				if (spriteid < 0xFD) spriteid >>= 1;

				rvi[i].image_index = spriteid;
			}
			break;

		case 0x13: // Dual-headed
			FOR_EACH_OBJECT {
				uint8 dual = grf_load_byte(&buf);

				if (dual != 0) {
					if (rvi[i].railveh_type != RAILVEH_MULTIHEAD) {
						// adjust power and running cost if needed
						rvi[i].power /= 2;
						rvi[i].running_cost_base /= 2;
					}
					rvi[i].railveh_type = RAILVEH_MULTIHEAD;
				} else {
					if (rvi[i].railveh_type == RAILVEH_MULTIHEAD) {
						// adjust power and running cost if needed
						rvi[i].power *= 2;
						rvi[i].running_cost_base *= 2;
					}
					rvi[i].railveh_type = rvi[i].power == 0 ?
						RAILVEH_WAGON : RAILVEH_SINGLEHEAD;
				}
			}
			break;

		case 0x14: // Cargo capacity
			FOR_EACH_OBJECT rvi[i].capacity = grf_load_byte(&buf);
			break;

		case 0x15: // Cargo type
			FOR_EACH_OBJECT {
				uint8 ctype = grf_load_byte(&buf);

				if (ctype < NUM_CARGO && HASBIT(_cargo_mask, ctype)) {
					rvi[i].cargo_type = ctype;
				} else {
					rvi[i].cargo_type = CT_INVALID;
					grfmsg(2, "RailVehicleChangeInfo: Invalid cargo type %d, using first refittable", ctype);
				}
			}
			break;

		case 0x16: // Weight
			FOR_EACH_OBJECT SB(rvi[i].weight, 0, 8, grf_load_byte(&buf));
			break;

		case 0x17: // Cost factor
			FOR_EACH_OBJECT rvi[i].base_cost = grf_load_byte(&buf);
			break;

		case 0x18: // AI rank
			FOR_EACH_OBJECT rvi[i].ai_rank = grf_load_byte(&buf);
			break;

		case 0x19: // Engine traction type
			/* What do the individual numbers mean?
			 * 0x00 .. 0x07: Steam
			 * 0x08 .. 0x27: Diesel
			 * 0x28 .. 0x31: Electric
			 * 0x32 .. 0x37: Monorail
			 * 0x38 .. 0x41: Maglev
			 */
			FOR_EACH_OBJECT {
				uint8 traction = grf_load_byte(&buf);
				EngineClass engclass;

				if (traction <= 0x07) {
					engclass = EC_STEAM;
				} else if (traction <= 0x27) {
					engclass = EC_DIESEL;
				} else if (traction <= 0x31) {
					engclass = EC_ELECTRIC;
				} else if (traction <= 0x37) {
					engclass = EC_MONORAIL;
				} else if (traction <= 0x41) {
					engclass = EC_MAGLEV;
				} else {
					break;
				}
				if (rvi[i].railtype == RAILTYPE_RAIL     && engclass >= EC_ELECTRIC) rvi[i].railtype = RAILTYPE_ELECTRIC;
				if (rvi[i].railtype == RAILTYPE_ELECTRIC && engclass  < EC_ELECTRIC) rvi[i].railtype = RAILTYPE_RAIL;

				rvi[i].engclass = engclass;
			}
			break;

		case 0x1A: // Alter purchase list sort order
			FOR_EACH_OBJECT {
				EngineID pos = grf_load_byte(&buf);

				if (pos < NUM_TRAIN_ENGINES) {
					AlterRailVehListOrder(engine + i, pos);
				} else {
					grfmsg(2, "RailVehicleChangeInfo: Invalid train engine ID %d, ignoring", pos);
				}
			}
			break;

		case 0x1B: // Powered wagons power bonus
			FOR_EACH_OBJECT rvi[i].pow_wag_power = grf_load_word(&buf);
			break;

		case 0x1C: // Refit cost
			FOR_EACH_OBJECT ei[i].refit_cost = grf_load_byte(&buf);
			break;

		case 0x1D: // Refit cargo
			FOR_EACH_OBJECT ei[i].refit_mask = grf_load_dword(&buf);
			break;

		case 0x1E: // Callback
			FOR_EACH_OBJECT ei[i].callbackmask = grf_load_byte(&buf);
			break;

		case 0x1F: // Tractive effort coefficient
			FOR_EACH_OBJECT rvi[i].tractive_effort = grf_load_byte(&buf);
			break;

		case 0x21: // Shorter vehicle
			FOR_EACH_OBJECT rvi[i].shorten_factor = grf_load_byte(&buf);
			break;

		case 0x22: // Visual effect
			/* see note in engine.h about rvi->visual_effect */
			FOR_EACH_OBJECT rvi[i].visual_effect = grf_load_byte(&buf);
			break;

		case 0x23: // Powered wagons weight bonus
			FOR_EACH_OBJECT rvi[i].pow_wag_weight = grf_load_byte(&buf);
			break;

		case 0x24: // High byte of vehicle weight
			FOR_EACH_OBJECT {
				byte weight = grf_load_byte(&buf);

				if (weight > 4) {
					grfmsg(2, "RailVehicleChangeInfo: Nonsensical weight of %d tons, ignoring", weight << 8);
				} else {
					SB(rvi[i].weight, 8, 8, weight);
				}
			}
			break;

		case 0x25: // User-defined bit mask to set when checking veh. var. 42
			FOR_EACH_OBJECT rvi[i].user_def_data = grf_load_byte(&buf);
			break;

		case 0x26: // Retire vehicle early
			FOR_EACH_OBJECT ei[i].retire_early = grf_load_byte(&buf);
			break;

		case 0x27: // Miscellaneous flags
			FOR_EACH_OBJECT {
				ei[i].misc_flags = grf_load_byte(&buf);
				if (HASBIT(ei[i].misc_flags, EF_USES_2CC)) SETBIT(_loaded_newgrf_features, GRFLOADED_2CC);
			}
			break;

		case 0x28: // Cargo classes allowed
			FOR_EACH_OBJECT cargo_allowed[engine + i] = grf_load_word(&buf);
			break;

		case 0x29: // Cargo classes disallowed
			FOR_EACH_OBJECT cargo_disallowed[engine + i] = grf_load_word(&buf);
			break;

		case 0x2A: // Long format introduction date (days since year 0)
			FOR_EACH_OBJECT ei[i].base_intro = grf_load_dword(&buf);
			break;

		/* @todo air drag and retire vehicle early
		 * Fall-through for unimplemented one byte long properties. */
		case 0x20: // Air drag
			FOR_EACH_OBJECT grf_load_byte(&buf);
			ret = true;
			break;

		default:
			ret = true;
			break;
	}
	*bufp = buf;
	return ret;
}

static bool RoadVehicleChangeInfo(uint engine, int numinfo, int prop, byte **bufp, int len)
{
	EngineInfo *ei = &_engine_info[ROAD_ENGINES_INDEX + engine];
	RoadVehicleInfo *rvi = &_road_vehicle_info[engine];
	byte *buf = *bufp;
	int i;
	bool ret = false;

	switch (prop) {
		case 0x08: // Speed (1 unit is 0.5 kmh)
			FOR_EACH_OBJECT rvi[i].max_speed = grf_load_byte(&buf);
			break;

		case 0x09: // Running cost factor
			FOR_EACH_OBJECT rvi[i].running_cost = grf_load_byte(&buf);
			break;

		case 0x0A: // Running cost base
			/* @todo : I have no idea. --pasky
			 * I THINK it is used for overriding the base cost of all road vehicle (_price.roadveh_base) --belugas */
			FOR_EACH_OBJECT grf_load_dword(&buf);
			ret = true;
			break;

		case 0x0E: // Sprite ID
			FOR_EACH_OBJECT {
				uint8 spriteid = grf_load_byte(&buf);

				/* cars have different custom id in the GRF file */
				if (spriteid == 0xFF) spriteid = 0xFD;

				if (spriteid < 0xFD) spriteid >>= 1;

				rvi[i].image_index = spriteid;
			}
			break;

		case 0x0F: // Cargo capacity
			FOR_EACH_OBJECT rvi[i].capacity = grf_load_byte(&buf);
			break;

		case 0x10: // Cargo type
			FOR_EACH_OBJECT {
				uint8 cargo = grf_load_byte(&buf);

				if (cargo < NUM_CARGO && HASBIT(_cargo_mask, cargo)) {
					rvi[i].cargo_type = cargo;
				} else {
					rvi[i].cargo_type = CT_INVALID;
					grfmsg(2, "RoadVehicleChangeInfo: Invalid cargo type %d, using first refittable", cargo);
				}
			}
			break;

		case 0x11: // Cost factor
			FOR_EACH_OBJECT rvi[i].base_cost = grf_load_byte(&buf); // ?? is it base_cost?
			break;

		case 0x12: // SFX
			FOR_EACH_OBJECT rvi[i].sfx = (SoundFx)grf_load_byte(&buf);
			break;

		case 0x13: // Power in 10hp
		case 0x14: // Weight in 1/4 tons
		case 0x15: // Speed in mph*0.8
			/* TODO: Support for road vehicles realistic power
			 * computations (called rvpower in TTDPatch) is just
			 * missing in OTTD yet. --pasky */
			FOR_EACH_OBJECT grf_load_byte(&buf);
			ret = true;
			break;

		case 0x16: // Cargos available for refitting
			FOR_EACH_OBJECT ei[i].refit_mask = grf_load_dword(&buf);
			break;

		case 0x17: // Callback mask
			FOR_EACH_OBJECT ei[i].callbackmask = grf_load_byte(&buf);
			break;

		case 0x1A: // Refit cost
			FOR_EACH_OBJECT ei[i].refit_cost = grf_load_byte(&buf);
			break;

		case 0x1B: // Retire vehicle early
			FOR_EACH_OBJECT ei[i].retire_early = grf_load_byte(&buf);
			break;

		case 0x1C: // Miscellaneous flags
			FOR_EACH_OBJECT {
				ei[i].misc_flags = grf_load_byte(&buf);
				if (HASBIT(ei[i].misc_flags, EF_USES_2CC)) SETBIT(_loaded_newgrf_features, GRFLOADED_2CC);
			}
			break;

		case 0x1D: // Cargo classes allowed
			FOR_EACH_OBJECT cargo_allowed[ROAD_ENGINES_INDEX + engine + i] = grf_load_word(&buf);
			break;

		case 0x1E: // Cargo classes disallowed
			FOR_EACH_OBJECT cargo_disallowed[ROAD_ENGINES_INDEX + engine + i] = grf_load_word(&buf);
			break;

		case 0x1F: // Long format introduction date (days since year 0)
			FOR_EACH_OBJECT ei[i].base_intro = grf_load_dword(&buf);
			break;

		case 0x18: // Tractive effort
		case 0x19: // Air drag
			/* @todo */
			FOR_EACH_OBJECT grf_load_byte(&buf);
			ret = true;
			break;

		default:
			ret = true;
			break;
	}

	*bufp = buf;
	return ret;
}

static bool ShipVehicleChangeInfo(uint engine, int numinfo, int prop, byte **bufp, int len)
{
	EngineInfo *ei = &_engine_info[SHIP_ENGINES_INDEX + engine];
	ShipVehicleInfo *svi = &_ship_vehicle_info[engine];
	byte *buf = *bufp;
	int i;
	bool ret = false;

	//printf("e %x prop %x?\n", engine, prop);
	switch (prop) {
		case 0x08: // Sprite ID
			FOR_EACH_OBJECT {
				uint8 spriteid = grf_load_byte(&buf);

				/* ships have different custom id in the GRF file */
				if (spriteid == 0xFF) spriteid = 0xFD;

				if (spriteid < 0xFD) spriteid >>= 1;

				svi[i].image_index = spriteid;
			}
			break;

		case 0x09: // Refittable
			FOR_EACH_OBJECT svi[i].refittable = (grf_load_byte(&buf) != 0);
			break;

		case 0x0A: // Cost factor
			FOR_EACH_OBJECT svi[i].base_cost = grf_load_byte(&buf); // ?? is it base_cost?
			break;

		case 0x0B: // Speed (1 unit is 0.5 kmh)
			FOR_EACH_OBJECT svi[i].max_speed = grf_load_byte(&buf);
			break;

		case 0x0C: // Cargo type
			FOR_EACH_OBJECT {
				uint8 cargo = grf_load_byte(&buf);

				if (cargo < NUM_CARGO && HASBIT(_cargo_mask, cargo)) {
					svi[i].cargo_type = cargo;
				} else {
					svi[i].cargo_type = CT_INVALID;
					grfmsg(2, "ShipVehicleChangeInfo: Invalid cargo type %d, using first refittable", cargo);
				}
			}
			break;

		case 0x0D: // Cargo capacity
			FOR_EACH_OBJECT svi[i].capacity = grf_load_word(&buf);
			break;

		case 0x0F: // Running cost factor
			FOR_EACH_OBJECT svi[i].running_cost = grf_load_byte(&buf);
			break;

		case 0x10: // SFX
			FOR_EACH_OBJECT svi[i].sfx = (SoundFx)grf_load_byte(&buf);
			break;

		case 0x11: // Cargos available for refitting
			FOR_EACH_OBJECT ei[i].refit_mask = grf_load_dword(&buf);
			break;

		case 0x12: // Callback mask
			FOR_EACH_OBJECT ei[i].callbackmask = grf_load_byte(&buf);
			break;

		case 0x13: // Refit cost
			FOR_EACH_OBJECT ei[i].refit_cost = grf_load_byte(&buf);
			break;

		case 0x16: // Retire vehicle early
			FOR_EACH_OBJECT ei[i].retire_early = grf_load_byte(&buf);
			break;

		case 0x17: // Miscellaneous flags
			FOR_EACH_OBJECT {
				ei[i].misc_flags = grf_load_byte(&buf);
				if (HASBIT(ei[i].misc_flags, EF_USES_2CC)) SETBIT(_loaded_newgrf_features, GRFLOADED_2CC);
			}
			break;

		case 0x18: // Cargo classes allowed
			FOR_EACH_OBJECT cargo_allowed[SHIP_ENGINES_INDEX + engine + i] = grf_load_word(&buf);
			break;

		case 0x19: // Cargo classes disallowed
			FOR_EACH_OBJECT cargo_disallowed[SHIP_ENGINES_INDEX + engine + i] = grf_load_word(&buf);
			break;

		case 0x1A: // Long format introduction date (days since year 0)
			FOR_EACH_OBJECT ei[i].base_intro = grf_load_dword(&buf);
			break;

		case 0x14: // Ocean speed fraction
		case 0x15: // Canal speed fraction
			/* @todo */
			FOR_EACH_OBJECT grf_load_byte(&buf);
			ret = true;
			break;

		default:
			ret = true;
			break;
	}

	*bufp = buf;
	return ret;
}

static bool AircraftVehicleChangeInfo(uint engine, int numinfo, int prop, byte **bufp, int len)
{
	EngineInfo *ei = &_engine_info[AIRCRAFT_ENGINES_INDEX + engine];
	AircraftVehicleInfo *avi = &_aircraft_vehicle_info[engine];
	byte *buf = *bufp;
	int i;
	bool ret = false;

	//printf("e %x prop %x?\n", engine, prop);
	switch (prop) {
		case 0x08: // Sprite ID
			FOR_EACH_OBJECT {
				uint8 spriteid = grf_load_byte(&buf);

				/* aircraft have different custom id in the GRF file */
				if (spriteid == 0xFF) spriteid = 0xFD;

				if (spriteid < 0xFD) spriteid >>= 1;

				avi[i].image_index = spriteid;
			}
			break;

		case 0x09: // Helicopter
			FOR_EACH_OBJECT {
				if (grf_load_byte(&buf) == 0) {
					avi[i].subtype = AIR_HELI;
				} else {
					SB(avi[i].subtype, 0, 1, 1); // AIR_CTOL
				}
			}
			break;

		case 0x0A: // Large
			FOR_EACH_OBJECT SB(avi[i].subtype, 1, 1, (grf_load_byte(&buf) != 0 ? 1 : 0)); // AIR_FAST
			break;

		case 0x0B: // Cost factor
			FOR_EACH_OBJECT avi[i].base_cost = grf_load_byte(&buf); // ?? is it base_cost?
			break;

		case 0x0C: // Speed (1 unit is 8 mph, we translate to 1 unit is 1 km/h)
			FOR_EACH_OBJECT avi[i].max_speed = (grf_load_byte(&buf) * 129) / 10;
			break;

		case 0x0D: // Acceleration
			FOR_EACH_OBJECT avi[i].acceleration = (grf_load_byte(&buf) * 129) / 10;
			break;

		case 0x0E: // Running cost factor
			FOR_EACH_OBJECT avi[i].running_cost = grf_load_byte(&buf);
			break;

		case 0x0F: // Passenger capacity
			FOR_EACH_OBJECT avi[i].passenger_capacity = grf_load_word(&buf);
			break;

		case 0x11: // Mail capacity
			FOR_EACH_OBJECT avi[i].mail_capacity = grf_load_byte(&buf);
			break;

		case 0x12: // SFX
			FOR_EACH_OBJECT avi[i].sfx = (SoundFx)grf_load_byte(&buf);
			break;

		case 0x13: // Cargos available for refitting
			FOR_EACH_OBJECT ei[i].refit_mask = grf_load_dword(&buf);
			break;

		case 0x14: // Callback mask
			FOR_EACH_OBJECT ei[i].callbackmask = grf_load_byte(&buf);
			break;

		case 0x15: // Refit cost
			FOR_EACH_OBJECT ei[i].refit_cost = grf_load_byte(&buf);
			break;

		case 0x16: // Retire vehicle early
			FOR_EACH_OBJECT ei[i].retire_early = grf_load_byte(&buf);
			break;

		case 0x17: // Miscellaneous flags
			FOR_EACH_OBJECT {
				ei[i].misc_flags = grf_load_byte(&buf);
				if (HASBIT(ei[i].misc_flags, EF_USES_2CC)) SETBIT(_loaded_newgrf_features, GRFLOADED_2CC);
			}
			break;

		case 0x18: // Cargo classes allowed
			FOR_EACH_OBJECT cargo_allowed[AIRCRAFT_ENGINES_INDEX + engine + i] = grf_load_word(&buf);
			break;

		case 0x19: // Cargo classes disallowed
			FOR_EACH_OBJECT cargo_disallowed[AIRCRAFT_ENGINES_INDEX + engine + i] = grf_load_word(&buf);
			break;

		case 0x1A: // Long format introduction date (days since year 0)
			FOR_EACH_OBJECT ei[i].base_intro = grf_load_dword(&buf);
			break;

		default:
			ret = true;
			break;
	}

	*bufp = buf;
	return ret;
}

static bool StationChangeInfo(uint stid, int numinfo, int prop, byte **bufp, int len)
{
	StationSpec **statspec;
	byte *buf = *bufp;
	int i;
	bool ret = false;

	if (stid + numinfo > MAX_STATIONS) {
		grfmsg(1, "StationChangeInfo: Station %u is invalid, max %u, ignoring", stid + numinfo, MAX_STATIONS);
		return false;
	}

	/* Allocate station specs if necessary */
	if (_cur_grffile->stations == NULL) _cur_grffile->stations = CallocT<StationSpec*>(MAX_STATIONS);

	statspec = &_cur_grffile->stations[stid];

	if (prop != 0x08) {
		/* Check that all stations we are modifying are defined. */
		FOR_EACH_OBJECT {
			if (statspec[i] == NULL) {
				grfmsg(2, "StationChangeInfo: Attempt to modify undefined station %u, ignoring", stid + i);
				return false;
			}
		}
	}

	switch (prop) {
		case 0x08: // Class ID
			FOR_EACH_OBJECT {
				/* Property 0x08 is special; it is where the station is allocated */
				if (statspec[i] == NULL) statspec[i] = CallocT<StationSpec>(1);

				/* Swap classid because we read it in BE meaning WAYP or DFLT */
				uint32 classid = grf_load_dword(&buf);
				statspec[i]->sclass = AllocateStationClass(BSWAP32(classid));
			}
			break;

		case 0x09: // Define sprite layout
			FOR_EACH_OBJECT {
				StationSpec *statspec = _cur_grffile->stations[stid + i];

				statspec->tiles = grf_load_extended(&buf);
				statspec->renderdata = CallocT<DrawTileSprites>(statspec->tiles);
				statspec->copied_renderdata = false;

				for (uint t = 0; t < statspec->tiles; t++) {
					DrawTileSprites *dts = &statspec->renderdata[t];
					uint seq_count = 0;

					dts->seq = NULL;
					dts->ground_sprite = grf_load_word(&buf);
					dts->ground_pal = grf_load_word(&buf);
					if (dts->ground_sprite == 0) continue;
					if (HASBIT(dts->ground_pal, 15)) {
						CLRBIT(dts->ground_pal, 15);
						SETBIT(dts->ground_sprite, SPRITE_MODIFIER_USE_OFFSET);
					}

					while (buf < *bufp + len) {
						DrawTileSeqStruct *dtss;

						/* no relative bounding box support */
						dts->seq = ReallocT((DrawTileSeqStruct*)dts->seq, ++seq_count);
						dtss = (DrawTileSeqStruct*) &dts->seq[seq_count - 1];

						dtss->delta_x = grf_load_byte(&buf);
						if ((byte) dtss->delta_x == 0x80) break;
						dtss->delta_y = grf_load_byte(&buf);
						dtss->delta_z = grf_load_byte(&buf);
						dtss->size_x = grf_load_byte(&buf);
						dtss->size_y = grf_load_byte(&buf);
						dtss->size_z = grf_load_byte(&buf);
						dtss->image = grf_load_word(&buf);
						dtss->pal = grf_load_word(&buf);

						/* Remap flags as ours collide */
						if (HASBIT(dtss->pal, 15)) {
							CLRBIT(dtss->pal, 15);
							SETBIT(dtss->image, SPRITE_MODIFIER_USE_OFFSET);
						}

						if (HASBIT(dtss->image, 15)) {
							CLRBIT(dtss->image, 15);
							SETBIT(dtss->image, PALETTE_MODIFIER_COLOR);
						}
						if (HASBIT(dtss->image, 14)) {
							CLRBIT(dtss->image, 14);
							SETBIT(dtss->image, PALETTE_MODIFIER_TRANSPARENT);
						}
					}
				}
			}
			break;

		case 0x0A: // Copy sprite layout
			FOR_EACH_OBJECT {
				StationSpec *statspec = _cur_grffile->stations[stid + i];
				byte srcid = grf_load_byte(&buf);
				const StationSpec *srcstatspec = _cur_grffile->stations[srcid];

				statspec->tiles = srcstatspec->tiles;
				statspec->renderdata = srcstatspec->renderdata;
				statspec->copied_renderdata = true;
			}
			break;

		case 0x0B: // Callback mask
			FOR_EACH_OBJECT statspec[i]->callbackmask = grf_load_byte(&buf);
			break;

		case 0x0C: // Disallowed number of platforms
			FOR_EACH_OBJECT statspec[i]->disallowed_platforms = grf_load_byte(&buf);
			break;

		case 0x0D: // Disallowed platform lengths
			FOR_EACH_OBJECT statspec[i]->disallowed_lengths = grf_load_byte(&buf);
			break;

		case 0x0E: // Define custom layout
			FOR_EACH_OBJECT {
				StationSpec *statspec = _cur_grffile->stations[stid + i];

				statspec->copied_layouts = false;

				while (buf < *bufp + len) {
					byte length = grf_load_byte(&buf);
					byte number = grf_load_byte(&buf);
					StationLayout layout;
					uint l, p;

					if (length == 0 || number == 0) break;

					//debug("l %d > %d ?", length, stat->lengths);
					if (length > statspec->lengths) {
						statspec->platforms = ReallocT(statspec->platforms, length);
						memset(statspec->platforms + statspec->lengths, 0, length - statspec->lengths);

						statspec->layouts = ReallocT(statspec->layouts, length);
						memset(statspec->layouts + statspec->lengths, 0,
						       (length - statspec->lengths) * sizeof(*statspec->layouts));

						statspec->lengths = length;
					}
					l = length - 1; // index is zero-based

					//debug("p %d > %d ?", number, stat->platforms[l]);
					if (number > statspec->platforms[l]) {
						statspec->layouts[l] = ReallocT(statspec->layouts[l], number);
						/* We expect NULL being 0 here, but C99 guarantees that. */
						memset(statspec->layouts[l] + statspec->platforms[l], 0,
						       (number - statspec->platforms[l]) * sizeof(**statspec->layouts));

						statspec->platforms[l] = number;
					}

					p = 0;
					layout = MallocT<byte>(length * number);
					for (l = 0; l < length; l++) {
						for (p = 0; p < number; p++) {
							layout[l * number + p] = grf_load_byte(&buf);
						}
					}

					l--;
					p--;
					free(statspec->layouts[l][p]);
					statspec->layouts[l][p] = layout;
				}
			}
			break;

		case 0x0F: // Copy custom layout
			FOR_EACH_OBJECT {
				StationSpec *statspec = _cur_grffile->stations[stid + i];
				byte srcid = grf_load_byte(&buf);
				const StationSpec *srcstatspec = _cur_grffile->stations[srcid];

				statspec->lengths   = srcstatspec->lengths;
				statspec->platforms = srcstatspec->platforms;
				statspec->layouts   = srcstatspec->layouts;
				statspec->copied_layouts = true;
			}
			break;

		case 0x10: // Little/lots cargo threshold
			FOR_EACH_OBJECT statspec[i]->cargo_threshold = grf_load_word(&buf);
			break;

		case 0x11: // Pylon placement
			FOR_EACH_OBJECT statspec[i]->pylons = grf_load_byte(&buf);
			break;

		case 0x12: // Cargo types for random triggers
			FOR_EACH_OBJECT statspec[i]->cargo_triggers = grf_load_dword(&buf);
			break;

		case 0x13: // General flags
			FOR_EACH_OBJECT statspec[i]->flags = grf_load_byte(&buf);
			break;

		case 0x14: // Overhead wire placement
			FOR_EACH_OBJECT statspec[i]->wires = grf_load_byte(&buf);
			break;

		case 0x15: // Blocked tiles
			FOR_EACH_OBJECT statspec[i]->blocked = grf_load_byte(&buf);
			break;

		case 0x16: // @todo Animation info
			FOR_EACH_OBJECT grf_load_word(&buf);
			ret = true;
			break;

		case 0x17: // @todo Animation speed
			FOR_EACH_OBJECT grf_load_byte(&buf);
			ret = true;
			break;

		case 0x18: // @todo Animation triggers
			FOR_EACH_OBJECT grf_load_word(&buf);
			ret = true;
			break;

		default:
			ret = true;
			break;
	}

	*bufp = buf;
	return ret;
}

static bool BridgeChangeInfo(uint brid, int numinfo, int prop, byte **bufp, int len)
{
	byte *buf = *bufp;
	int i;
	bool ret = false;

	switch (prop) {
		case 0x08: // Year of availability
			FOR_EACH_OBJECT _bridge[brid + i].avail_year = ORIGINAL_BASE_YEAR + grf_load_byte(&buf);
			break;

		case 0x09: // Minimum length
			FOR_EACH_OBJECT _bridge[brid + i].min_length = grf_load_byte(&buf);
			break;

		case 0x0A: // Maximum length
			FOR_EACH_OBJECT _bridge[brid + i].max_length = grf_load_byte(&buf);
			break;

		case 0x0B: // Cost factor
			FOR_EACH_OBJECT _bridge[brid + i].price = grf_load_byte(&buf);
			break;

		case 0x0C: // Maximum speed
			FOR_EACH_OBJECT _bridge[brid + i].speed = grf_load_word(&buf);
			break;

		case 0x0D: // Bridge sprite tables
			FOR_EACH_OBJECT {
				Bridge *bridge = &_bridge[brid + i];
				byte tableid = grf_load_byte(&buf);
				byte numtables = grf_load_byte(&buf);

				if (bridge->sprite_table == NULL) {
					/* Allocate memory for sprite table pointers and zero out */
					bridge->sprite_table = CallocT<PalSpriteID*>(7);
				}

				for (; numtables-- != 0; tableid++) {
					if (tableid >= 7) { // skip invalid data
						grfmsg(1, "BridgeChangeInfo: Table %d >= 7, skipping", tableid);
						for (byte sprite = 0; sprite < 32; sprite++) grf_load_dword(&buf);
						continue;
					}

					if (bridge->sprite_table[tableid] == NULL) {
						bridge->sprite_table[tableid] = MallocT<PalSpriteID>(32);
					}

					for (byte sprite = 0; sprite < 32; sprite++) {
						SpriteID image = grf_load_word(&buf);
						SpriteID pal   = grf_load_word(&buf);

						if (HASBIT(pal, 15)) {
							SETBIT(image, PALETTE_MODIFIER_TRANSPARENT);
						}

						/* Clear old color modifer bit */
						CLRBIT(image, 15);

						bridge->sprite_table[tableid][sprite].sprite = image;
						bridge->sprite_table[tableid][sprite].pal    = pal;
					}
				}
			}
			break;

		case 0x0E: // Flags; bit 0 - disable far pillars
			FOR_EACH_OBJECT _bridge[brid + i].flags = grf_load_byte(&buf);
			break;

		case 0x0F: // Long format year of availability (year since year 0)
			FOR_EACH_OBJECT _bridge[brid + i].avail_year = clamp(grf_load_dword(&buf), MIN_YEAR, MAX_YEAR);
			break;

		default:
			ret = true;
	}

	*bufp = buf;
	return ret;
}

static bool TownHouseChangeInfo(uint hid, int numinfo, int prop, byte **bufp, int len)
{
	HouseSpec **housespec;
	byte *buf = *bufp;
	int i;
	bool ret = false;

	if (hid + numinfo >= HOUSE_MAX) {
		grfmsg(1, "TownHouseChangeInfo: Too many houses loaded (%u), max (%u). Ignoring.", hid + numinfo, HOUSE_MAX-1);
		return false;
	}

	/* Allocate house specs if they haven't been allocated already. */
	if (_cur_grffile->housespec == NULL) {
		_cur_grffile->housespec = CallocT<HouseSpec*>(HOUSE_MAX);

		/* Reset any overrides that have been set. */
		_house_mngr.ResetOverride();
	}

	housespec = &_cur_grffile->housespec[hid];

	if (prop != 0x08) {
		/* Check that all the houses being modified have been defined. */
		FOR_EACH_OBJECT {
			if (housespec[i] == NULL) {
				grfmsg(2, "TownHouseChangeInfo: Attempt to modify undefined house %u. Ignoring.", hid + i);
				return false;
			}
		}
	}

	switch (prop) {
		case 0x08: // Substitute building type, and definition of a new house
			FOR_EACH_OBJECT {
				byte subs_id = grf_load_byte(&buf);

				if (subs_id == 0xFF) {
					/* Instead of defining a new house, a substitute house id
					 * of 0xFF disables the old house with the current id. */
					_house_specs[hid + i].enabled = false;
					continue;
				} else if (subs_id >= NEW_HOUSE_OFFSET) {
					/* The substitute id must be one of the original houses. */
					grfmsg(2, "TownHouseChangeInfo: Attempt to use new house %u as substitute house for %u. Ignoring.", subs_id, hid + i);
					return false;
				}

				/* Allocate space for this house. */
				if (housespec[i] == NULL) housespec[i] = CallocT<HouseSpec>(1);

				memcpy(housespec[i], &_house_specs[subs_id], sizeof(_house_specs[subs_id]));

				housespec[i]->enabled = true;
				housespec[i]->local_id = hid + i;
				housespec[i]->substitute_id = subs_id;
				housespec[i]->grffile = _cur_grffile;
				housespec[i]->random_colour[0] = 0x04;  // those 4 random colours are the base colour
				housespec[i]->random_colour[1] = 0x08;  // for all new houses
				housespec[i]->random_colour[2] = 0x0C;  // they stand for red, blue, orange and green
				housespec[i]->random_colour[3] = 0x06;

				/* New houses do not (currently) expect to have a default start
				 * date before 1930, as this breaks the build date stuff. See
				 * FinaliseHouseArray() for more details. */
				if (housespec[i]->min_date < 1930) housespec[i]->min_date = 1930;
			}
			SETBIT(_loaded_newgrf_features, GRFLOADED_NEWHOUSES);
			break;

		case 0x09: // Building flags
			FOR_EACH_OBJECT {
				byte state = grf_load_byte(&buf);
				housespec[i]->building_flags = (BuildingFlags)state;
			}
			break;

		case 0x0A: // Availability years
			FOR_EACH_OBJECT {
				uint16 years = grf_load_word(&buf);
				housespec[i]->min_date = GB(years, 0, 8) > 150 ? MAX_YEAR : ORIGINAL_BASE_YEAR + GB(years, 0, 8);
				housespec[i]->max_date = GB(years, 8, 8) > 150 ? MAX_YEAR : ORIGINAL_BASE_YEAR + GB(years, 8, 8);
			}
			break;

		case 0x0B: // Population
			FOR_EACH_OBJECT housespec[i]->population = grf_load_byte(&buf);
			break;

		case 0x0C: // Mail generation multiplier
			FOR_EACH_OBJECT housespec[i]->mail_generation = grf_load_byte(&buf);
			break;

		case 0x0D: // Passenger acceptance
		case 0x0E: // Mail acceptance
			FOR_EACH_OBJECT housespec[i]->cargo_acceptance[prop - 0x0D] = grf_load_byte(&buf);
			break;
		case 0x0F: // Goods/candy, food/fizzy drinks acceptance
			FOR_EACH_OBJECT {
				int8 goods = grf_load_byte(&buf);

				/* If value of goods is negative, it means in fact food or, if in toyland, fizzy_drink acceptance.
				 * Else, we have "standard" 3rd cargo type, goods or candy, for toyland once more */
				housespec[i]->accepts_cargo[2] = (goods >= 0) ? ((_opt.landscape == LT_TOYLAND) ? CT_CANDY : CT_GOODS) :
						((_opt.landscape == LT_TOYLAND) ? CT_FIZZY_DRINKS : CT_FOOD);

				housespec[i]->cargo_acceptance[2] = abs(goods); // but we do need positive value here
			}
			break;

		case 0x10: // Local authority rating decrease on removal
			FOR_EACH_OBJECT housespec[i]->remove_rating_decrease = grf_load_word(&buf);
			break;

		case 0x11: // Removal cost multiplier
			FOR_EACH_OBJECT housespec[i]->removal_cost = grf_load_byte(&buf);
			break;

		case 0x12: // Building name ID
			FOR_EACH_OBJECT housespec[i]->building_name = MapGRFStringID(_cur_grffile->grfid, grf_load_word(&buf));
			break;

		case 0x13: // Building availability mask
			FOR_EACH_OBJECT {
				uint16 avail = grf_load_word(&buf);
				housespec[i]->building_availability = (HouseZones)avail;
			}
			break;

		case 0x14: // House callback flags
			FOR_EACH_OBJECT housespec[i]->callback_mask = grf_load_byte(&buf);
			break;

		case 0x15: // House override byte
			FOR_EACH_OBJECT {
				byte override = grf_load_byte(&buf);

				/* The house being overridden must be an original house. */
				if (override >= NEW_HOUSE_OFFSET) {
					grfmsg(2, "TownHouseChangeInfo: Attempt to override new house %u with house id %u. Ignoring.", override, hid);
					return false;
				}

				_house_mngr.Add(hid, override);
			}
			break;

		case 0x16: // Periodic refresh multiplier
			FOR_EACH_OBJECT housespec[i]->processing_time = grf_load_byte(&buf);
			break;

		case 0x17: // Four random colours to use
			FOR_EACH_OBJECT {
				uint j;
				for (j = 0; j < 4; j++) housespec[i]->random_colour[j] = grf_load_byte(&buf);
			}
			break;

		case 0x18: // Relative probability of appearing
			FOR_EACH_OBJECT housespec[i]->probability = grf_load_byte(&buf);
			break;

		case 0x19: // Extra flags
			FOR_EACH_OBJECT {
				byte flags = grf_load_byte(&buf);
				housespec[i]->extra_flags = (HouseExtraFlags)flags;
			}
			break;

		case 0x1A: // Animation frames
			FOR_EACH_OBJECT housespec[i]->animation_frames = grf_load_byte(&buf);
			break;

		case 0x1B: // Animation speed
			FOR_EACH_OBJECT housespec[i]->animation_speed = clamp(grf_load_byte(&buf), 2, 16);
			break;

		case 0x1C: // Class of the building type
			FOR_EACH_OBJECT housespec[i]->class_id = AllocateHouseClassID(grf_load_byte(&buf), _cur_grffile->grfid);
			break;

		case 0x1D: // Callback flags 2
			FOR_EACH_OBJECT housespec[i]->callback_mask |= (grf_load_byte(&buf) << 8);
			break;

		case 0x1E: // Accepted cargo types
			FOR_EACH_OBJECT {
				uint32 cargotypes = grf_load_dword(&buf);

				/* Check if the cargo types should not be changed */
				if (cargotypes == 0xFFFFFFFF) break;

				for (uint j = 0; j < 3; j++) {
					/* Get the cargo number from the 'list' */
					uint8 cargo_part = GB(cargotypes, 8 * j, 8);
					CargoID cargo = GetCargoTranslation(cargo_part, _cur_grffile);

					if (cargo == CT_INVALID) {
						/* Disable acceptance of invalid cargo type */
						housespec[i]->cargo_acceptance[j] = 0;
					} else {
						housespec[i]->accepts_cargo[j] = cargo;
					}
				}
			}
			break;

		case 0x1F: // Minimum life span
			FOR_EACH_OBJECT housespec[i]->minimum_life = grf_load_byte(&buf);
			break;

		default:
			ret = true;
			break;
	}

	*bufp = buf;
	return ret;
}

static bool GlobalVarChangeInfo(uint gvid, int numinfo, int prop, byte **bufp, int len)
{
	byte *buf = *bufp;
	int i;
	bool ret = false;

	switch (prop) {
		case 0x08: /* Cost base factor */
			FOR_EACH_OBJECT {
				byte factor = grf_load_byte(&buf);
				uint price = gvid + i;

				if (price < NUM_PRICES) {
					SetPriceBaseMultiplier(price, factor);
				} else {
					grfmsg(1, "GlobalVarChangeInfo: Price %d out of range, ignoring", price);
				}
			}
			break;

		case 0x09: /* Cargo translation table */
			/* This is loaded during the initialisation stage, so just skip it here. */
			/* Each entry is 4 bytes. */
			buf += numinfo * 4;
			break;

		case 0x0A: // Currency display names
			FOR_EACH_OBJECT {
				uint curidx = GetNewgrfCurrencyIdConverted(gvid + i);
				StringID newone = GetGRFStringID(_cur_grffile->grfid, grf_load_word(&buf));

				if ((newone != STR_UNDEFINED) && (curidx < NUM_CURRENCY)) {
					_currency_specs[curidx].name = newone;
				}
			}
			break;

		case 0x0B: // Currency multipliers
			FOR_EACH_OBJECT {
				uint curidx = GetNewgrfCurrencyIdConverted(gvid + i);
				uint32 rate = grf_load_dword(&buf);

				if (curidx < NUM_CURRENCY) {
					/* TTDPatch uses a multiple of 1000 for its conversion calculations,
					 * which OTTD does not. For this reason, divide grf value by 1000,
					 * to be compatible */
					_currency_specs[curidx].rate = rate / 1000;
				} else {
					grfmsg(1, "GlobalVarChangeInfo: Currency multipliers %d out of range, ignoring", curidx);
				}
			}
			break;

		case 0x0C: // Currency options
			FOR_EACH_OBJECT {
				uint curidx = GetNewgrfCurrencyIdConverted(gvid + i);
				uint16 options = grf_load_word(&buf);

				if (curidx < NUM_CURRENCY) {
					_currency_specs[curidx].separator = GB(options, 0, 8);
					/* By specifying only one bit, we prevent errors,
					 * since newgrf specs said that only 0 and 1 can be set for symbol_pos */
					_currency_specs[curidx].symbol_pos = GB(options, 8, 1);
				} else {
					grfmsg(1, "GlobalVarChangeInfo: Currency option %d out of range, ignoring", curidx);
				}
			}
			break;

		case 0x0D: // Currency prefix symbol
			FOR_EACH_OBJECT {
				uint curidx = GetNewgrfCurrencyIdConverted(gvid + i);
				uint32 tempfix = grf_load_dword(&buf);

				if (curidx < NUM_CURRENCY) {
					memcpy(_currency_specs[curidx].prefix,&tempfix,4);
					_currency_specs[curidx].prefix[4] = 0;
				} else {
					grfmsg(1, "GlobalVarChangeInfo: Currency symbol %d out of range, ignoring", curidx);
				}
			}
			break;

		case 0x0E: // Currency suffix symbol
			FOR_EACH_OBJECT {
				uint curidx = GetNewgrfCurrencyIdConverted(gvid + i);
				uint32 tempfix = grf_load_dword(&buf);

				if (curidx < NUM_CURRENCY) {
					memcpy(&_currency_specs[curidx].suffix, &tempfix, 4);
					_currency_specs[curidx].suffix[4] = 0;
				} else {
					grfmsg(1, "GlobalVarChangeInfo: Currency symbol %d out of range, ignoring", curidx);
				}
			}
			break;

		case 0x0F: //  Euro introduction dates
			FOR_EACH_OBJECT {
				uint curidx = GetNewgrfCurrencyIdConverted(gvid + i);
				Year year_euro = grf_load_word(&buf);

				if (curidx < NUM_CURRENCY) {
					_currency_specs[curidx].to_euro = year_euro;
				} else {
					grfmsg(1, "GlobalVarChangeInfo: Euro intro date %d out of range, ignoring", curidx);
				}
			}
			break;

		case 0x10: // 12 * 32 * B Snow line height table
			if (numinfo > 1 || IsSnowLineSet()) {
				grfmsg(1, "GlobalVarChangeInfo: The snowline can only be set once (%d)", numinfo);
			} else if (len < SNOW_LINE_MONTHS * SNOW_LINE_DAYS) {
				grfmsg(1, "GlobalVarChangeInfo: Not enough entries set in the snowline table (%d)", len);
			} else {
				byte table[SNOW_LINE_MONTHS][SNOW_LINE_DAYS];

				for (uint i = 0; i < SNOW_LINE_MONTHS; i++) {
					for (uint j = 0; j < SNOW_LINE_DAYS; j++) {
						table[i][j] = grf_load_byte(&buf);
					}
				}
				SetSnowLine(table);
			}
			break;

		default:
			ret = true;
	}

	*bufp = buf;
	return ret;
}

static bool CargoChangeInfo(uint cid, int numinfo, int prop, byte **bufp, int len)
{
	if (cid + numinfo > NUM_CARGO) {
		grfmsg(2, "CargoChangeInfo: Cargo type %d out of range (max %d)", cid + numinfo, NUM_CARGO - 1);
		return false;
	}

	CargoSpec *cs = &_cargo[cid];
	byte *buf = *bufp;
	int i;
	bool ret = false;

	switch (prop) {
		case 0x08: /* Bit number of cargo */
			FOR_EACH_OBJECT {
				cs[i].bitnum = grf_load_byte(&buf);
				cs[i].grfid = _cur_grffile->grfid;
				if (cs->IsValid()) {
					SETBIT(_cargo_mask, cid + i);
				} else {
					CLRBIT(_cargo_mask, cid + i);
				}
			}
			break;

		case 0x09: /* String ID for cargo type name */
			FOR_EACH_OBJECT cs[i].name = grf_load_word(&buf);
			break;

		case 0x0A: /* String for cargo name, plural */
			FOR_EACH_OBJECT cs[i].name_plural = grf_load_word(&buf);
			break;

		case 0x0B:
			/* String for units of cargo. This is different in OpenTTD to TTDPatch
			 * (e.g. 10 tonnes of coal) */
			FOR_EACH_OBJECT cs[i].units_volume = grf_load_word(&buf);
			break;

		case 0x0C: /* String for quantity of cargo (e.g. 10 tonnes of coal) */
			FOR_EACH_OBJECT cs[i].quantifier = grf_load_word(&buf);
			break;

		case 0x0D: /* String for two letter cargo abbreviation */
			FOR_EACH_OBJECT cs[i].abbrev = grf_load_word(&buf);
			break;

		case 0x0E: /* Sprite ID for cargo icon */
			FOR_EACH_OBJECT cs[i].sprite = grf_load_word(&buf);
			break;

		case 0x0F: /* Weight of one unit of cargo */
			FOR_EACH_OBJECT cs[i].weight = grf_load_byte(&buf);
			break;

		case 0x10: /* Used for payment calculation */
			FOR_EACH_OBJECT cs[i].transit_days[0] = grf_load_byte(&buf);
			break;

		case 0x11: /* Used for payment calculation */
			FOR_EACH_OBJECT cs[i].transit_days[1] = grf_load_byte(&buf);
			break;

		case 0x12: /* Base cargo price */
			FOR_EACH_OBJECT cs[i].initial_payment = grf_load_dword(&buf);
			break;

		case 0x13: /* Colour for station rating bars */
			FOR_EACH_OBJECT cs[i].rating_colour = MapDOSColour(grf_load_byte(&buf));
			break;

		case 0x14: /* Colour for cargo graph */
			FOR_EACH_OBJECT cs[i].legend_colour = MapDOSColour(grf_load_byte(&buf));
			break;

		case 0x15: /* Freight status */
			FOR_EACH_OBJECT cs[i].is_freight = grf_load_byte(&buf) != 0;
			break;

		case 0x16: /* Cargo classes */
			FOR_EACH_OBJECT cs[i].classes = grf_load_word(&buf);
			break;

		case 0x17: /* Cargo label */
			FOR_EACH_OBJECT {
				cs[i].label = grf_load_dword(&buf);
				cs[i].label = BSWAP32(cs[i].label);
			}
			break;

		case 0x18: /* Town growth substitute type */
			FOR_EACH_OBJECT {
				uint8 substitute_type = grf_load_byte(&buf);
				switch (substitute_type) {
					case 0x00: cs[i].town_effect = TE_PASSENGERS; break;
					case 0x02: cs[i].town_effect = TE_MAIL; break;
					case 0x05: cs[i].town_effect = TE_GOODS; break;
					case 0x09: cs[i].town_effect = TE_WATER; break;
					case 0x0B: cs[i].town_effect = TE_FOOD; break;
					default:
						grfmsg(1, "CargoChangeInfo: Unknown town growth substitute value %d, setting to none.", substitute_type);
					case 0xFF: cs[i].town_effect = TE_NONE; break;
				}
			}
			break;

		case 0x19: /* Town growth coefficient */
			FOR_EACH_OBJECT cs[i].multipliertowngrowth = grf_load_word(&buf);
			break;

		case 0x1A: /* Bitmask of callbacks to use */
			FOR_EACH_OBJECT cs[i].callback_mask = grf_load_byte(&buf);
			break;

		default:
			ret = true;
	}

	*bufp = buf;
	return ret;
}


static bool SoundEffectChangeInfo(uint sid, int numinfo, int prop, byte **bufp, int len)
{
	byte *buf = *bufp;
	int i;
	bool ret = false;

	if (_cur_grffile->sound_offset == 0) {
		grfmsg(1, "SoundEffectChangeInfo: No effects defined, skipping");
		return false;
	}

	switch (prop) {
		case 0x08: // Relative volume
			FOR_EACH_OBJECT {
				uint sound = sid + i + _cur_grffile->sound_offset - GetNumOriginalSounds();

				if (sound >= GetNumSounds()) {
					grfmsg(1, "SoundEffectChangeInfo: Sound %d not defined (max %d)", sound, GetNumSounds());
				} else {
					GetSound(sound)->volume = grf_load_byte(&buf);
				}
			}
			break;

		case 0x09: // Priority
			FOR_EACH_OBJECT {
				uint sound = sid + i + _cur_grffile->sound_offset - GetNumOriginalSounds();

				if (sound >= GetNumSounds()) {
					grfmsg(1, "SoundEffectChangeInfo: Sound %d not defined (max %d)", sound, GetNumSounds());
				} else {
					GetSound(sound)->priority = grf_load_byte(&buf);
				}
			}
			break;

		case 0x0A: // Override old sound
			FOR_EACH_OBJECT {
				uint sound = sid + i + _cur_grffile->sound_offset - GetNumOriginalSounds();
				uint orig_sound = grf_load_byte(&buf);

				if (sound >= GetNumSounds() || orig_sound >= GetNumSounds()) {
					grfmsg(1, "SoundEffectChangeInfo: Sound %d or %d not defined (max %d)", sound, orig_sound, GetNumSounds());
				} else {
					FileEntry *newfe = GetSound(sound);
					FileEntry *oldfe = GetSound(orig_sound);

					/* Literally copy the data of the new sound over the original */
					*oldfe = *newfe;
				}
			}
			break;

		default:
			ret = true;
	}

	*bufp = buf;
	return ret;
}

/* Action 0x00 */
static void FeatureChangeInfo(byte *buf, int len)
{
	byte *bufend = buf + len;
	uint i;

	/* <00> <feature> <num-props> <num-info> <id> (<property <new-info>)...
	 *
	 * B feature       0, 1, 2 or 3 for trains, road vehicles, ships or planes
	 *                 4 for defining new train station sets
	 * B num-props     how many properties to change per vehicle/station
	 * B num-info      how many vehicles/stations to change
	 * B id            ID of first vehicle/station to change, if num-info is
	 *                 greater than one, this one and the following
	 *                 vehicles/stations will be changed
	 * B property      what property to change, depends on the feature
	 * V new-info      new bytes of info (variable size; depends on properties) */
	/* TODO: Bridges, town houses. */

	static const VCI_Handler handler[] = {
		/* GSF_TRAIN */        RailVehicleChangeInfo,
		/* GSF_ROAD */         RoadVehicleChangeInfo,
		/* GSF_SHIP */         ShipVehicleChangeInfo,
		/* GSF_AIRCRAFT */     AircraftVehicleChangeInfo,
		/* GSF_STATION */      StationChangeInfo,
		/* GSF_CANAL */        NULL,
		/* GSF_BRIDGE */       BridgeChangeInfo,
		/* GSF_TOWNHOUSE */    TownHouseChangeInfo,
		/* GSF_GLOBALVAR */    GlobalVarChangeInfo,
		/* GSF_INDUSTRYTILES */NULL,
		/* GSF_INDUSTRIES */   NULL,
		/* GSF_CARGOS */       NULL, /* Cargo is handled during reservation */
		/* GSF_SOUNDFX */      SoundEffectChangeInfo,
	};

	EngineInfo *ei = NULL;

	if (!check_length(len, 6, "FeatureChangeInfo")) return;
	buf++;
	uint8 feature  = grf_load_byte(&buf);
	uint8 numprops = grf_load_byte(&buf);
	uint numinfo  = grf_load_byte(&buf);
	uint engine   = grf_load_byte(&buf);

	grfmsg(6, "FeatureChangeInfo: feature %d, %d properties, to apply to %d+%d",
	               feature, numprops, engine, numinfo);

	if (feature >= lengthof(handler) || handler[feature] == NULL) {
		grfmsg(1, "FeatureChangeInfo: Unsupported feature %d, skipping", feature);
		return;
	}

	if (feature <= GSF_AIRCRAFT) {
		if (engine + numinfo > _vehcounts[feature]) {
			grfmsg(0, "FeatureChangeInfo: Last engine ID %d out of bounds (max %d), skipping", engine + numinfo, _vehcounts[feature]);
			return;
		}
		ei = &_engine_info[engine + _vehshifts[feature]];
	}

	while (numprops-- && buf < bufend) {
		uint8 prop = grf_load_byte(&buf);
		bool ignoring = false;

		switch (feature) {
			case GSF_TRAIN:
			case GSF_ROAD:
			case GSF_SHIP:
			case GSF_AIRCRAFT:
				/* Common properties for vehicles */
				switch (prop) {
					case 0x00: // Introduction date
						FOR_EACH_OBJECT ei[i].base_intro = grf_load_word(&buf) + DAYS_TILL_ORIGINAL_BASE_YEAR;
						break;

					case 0x02: // Decay speed
						FOR_EACH_OBJECT SB(ei[i].unk2, 0, 7, grf_load_byte(&buf) & 0x7F);
						break;

					case 0x03: // Vehicle life
						FOR_EACH_OBJECT ei[i].lifelength = grf_load_byte(&buf);
						break;

					case 0x04: // Model life
						FOR_EACH_OBJECT ei[i].base_life = grf_load_byte(&buf);
						break;

					case 0x06: // Climates available
						FOR_EACH_OBJECT ei[i].climates = grf_load_byte(&buf);
						break;

					case 0x07: // Loading speed
						/* Hyronymus explained me what does
						 * this mean and insists on having a
						 * credit ;-). --pasky */
						FOR_EACH_OBJECT ei[i].load_amount = grf_load_byte(&buf);
						break;

					default:
						if (handler[feature](engine, numinfo, prop, &buf, bufend - buf)) {
							ignoring = true;
						}
						break;
				}
				break;

			default:
				if (handler[feature](engine, numinfo, prop, &buf, bufend - buf)) {
					ignoring = true;
				}
				break;
		}

		if (ignoring) grfmsg(2, "FeatureChangeInfo: Ignoring property 0x%02X (not implemented)", prop);
	}
}

/* Action 0x00 (GLS_SAFETYSCAN) */
static void SafeChangeInfo(byte *buf, int len)
{
	if (!check_length(len, 6, "SafeChangeInfo")) return;
	buf++;
	uint8 feature  = grf_load_byte(&buf);
	uint8 numprops = grf_load_byte(&buf);
	grf_load_byte(&buf);
	grf_load_byte(&buf);

	if (feature == GSF_BRIDGE && numprops == 1) {
		uint8 prop = grf_load_byte(&buf);
		/* Bridge property 0x0D is redefinition of sprite layout tables, which
		 * is considered safe. */
		if (prop == 0x0D) return;
	}

	SETBIT(_cur_grfconfig->flags, GCF_UNSAFE);

	/* Skip remainder of GRF */
	_skip_sprites = -1;
}

/* Action 0x00 (GLS_INIT) */
static void InitChangeInfo(byte *buf, int len)
{
	byte *bufend = buf + len;

	if (!check_length(len, 6, "InitChangeInfo")) return;
	buf++;
	uint8 feature  = grf_load_byte(&buf);
	uint8 numprops = grf_load_byte(&buf);
	uint8 numinfo  = grf_load_byte(&buf);
	uint8 index    = grf_load_byte(&buf);

	while (numprops-- && buf < bufend) {
		uint8 prop = grf_load_byte(&buf);

		switch (feature) {
			case GSF_GLOBALVAR:
				switch (prop) {
					case 0x09: // Cargo Translation Table
						if (index != 0) {
							grfmsg(1, "InitChangeInfo: Cargo translation table must start at zero");
							return;
						}

						free(_cur_grffile->cargo_list);
						_cur_grffile->cargo_max = numinfo;
						_cur_grffile->cargo_list = MallocT<CargoLabel>(numinfo);

						int i;
						FOR_EACH_OBJECT {
							CargoLabel cl = grf_load_dword(&buf);
							_cur_grffile->cargo_list[i] = BSWAP32(cl);
						}
						break;
				}
				break;
		}
	}
}

/* Action 0x00 (GLS_RESERVE) */
static void ReserveChangeInfo(byte *buf, int len)
{
	byte *bufend = buf + len;

	if (!check_length(len, 6, "InitChangeInfo")) return;
	buf++;
	uint8 feature  = grf_load_byte(&buf);

	if (feature != GSF_CARGOS) return;

	uint8 numprops = grf_load_byte(&buf);
	uint8 numinfo  = grf_load_byte(&buf);
	uint8 index    = grf_load_byte(&buf);

	while (numprops-- && buf < bufend) {
		uint8 prop = grf_load_byte(&buf);

		if (CargoChangeInfo(index, numinfo, prop, &buf, bufend - buf)) {
			grfmsg(2, "ReserveChangeInfo: Ignoring property 0x%02X (not implemented)", prop);
		}
	}
}

#undef FOR_EACH_OBJECT

/**
 * Creates a spritegroup representing a callback result
 * @param value The value that was used to represent this callback result
 * @return A spritegroup representing that callback result
 */
static const SpriteGroup* NewCallBackResultSpriteGroup(uint16 value)
{
	SpriteGroup *group = AllocateSpriteGroup();

	group->type = SGT_CALLBACK;

	/* Old style callback results have the highest byte 0xFF so signify it is a callback result
	 * New style ones only have the highest bit set (allows 15-bit results, instead of just 8) */
	if ((value >> 8) == 0xFF) {
		value &= ~0xFF00;
	} else {
		value &= ~0x8000;
	}

	group->g.callback.result = value;

	return group;
}

/**
 * Creates a spritegroup representing a sprite number result.
 * @param sprite The sprite number.
 * @param num_sprites The number of sprites per set.
 * @return A spritegroup representing the sprite number result.
 */
static const SpriteGroup* NewResultSpriteGroup(SpriteID sprite, byte num_sprites)
{
	SpriteGroup *group = AllocateSpriteGroup();
	group->type = SGT_RESULT;
	group->g.result.sprite = sprite;
	group->g.result.num_sprites = num_sprites;
	return group;
}

/* Action 0x01 */
static void NewSpriteSet(byte *buf, int len)
{
	/* <01> <feature> <num-sets> <num-ent>
	 *
	 * B feature       feature to define sprites for
	 *                 0, 1, 2, 3: veh-type, 4: train stations
	 * B num-sets      number of sprite sets
	 * E num-ent       how many entries per sprite set
	 *                 For vehicles, this is the number of different
	 *                         vehicle directions in each sprite set
	 *                         Set num-dirs=8, unless your sprites are symmetric.
	 *                         In that case, use num-dirs=4.
	 */

	if (!check_length(len, 4, "NewSpriteSet")) return;
	buf++;
	uint8 feature   = grf_load_byte(&buf);
	uint8 num_sets  = grf_load_byte(&buf);
	uint16 num_ents = grf_load_extended(&buf);

	_cur_grffile->spriteset_start = _cur_spriteid;
	_cur_grffile->spriteset_feature = feature;
	_cur_grffile->spriteset_numsets = num_sets;
	_cur_grffile->spriteset_numents = num_ents;

	grfmsg(7, "New sprite set at %d of type %d, consisting of %d sets with %d views each (total %d)",
		_cur_spriteid, feature, num_sets, num_ents, num_sets * num_ents
	);

	for (uint16 i = 0; i < num_sets * num_ents; i++) {
		LoadNextSprite(_cur_spriteid++, _file_index);
		_nfo_line++;
	}
}

/* Action 0x01 (SKIP) */
static void SkipAct1(byte *buf, int len)
{
	if (!check_length(len, 4, "SkipAct1")) return;
	buf++;
	grf_load_byte(&buf);
	uint8 num_sets  = grf_load_byte(&buf);
	uint16 num_ents = grf_load_extended(&buf);

	_skip_sprites = num_sets * num_ents;

	grfmsg(3, "SkipAct1: Skipping %d sprites", _skip_sprites);
}

/* Helper function to either create a callback or link to a previously
 * defined spritegroup. */
static const SpriteGroup* GetGroupFromGroupID(byte setid, byte type, uint16 groupid)
{
	if (HASBIT(groupid, 15)) return NewCallBackResultSpriteGroup(groupid);

	if (groupid >= _cur_grffile->spritegroups_count || _cur_grffile->spritegroups[groupid] == NULL) {
		grfmsg(1, "GetGroupFromGroupID(0x%02X:0x%02X): Groupid 0x%04X does not exist, leaving empty", setid, type, groupid);
		return NULL;
	}

	return _cur_grffile->spritegroups[groupid];
}

/* Helper function to either create a callback or a result sprite group. */
static const SpriteGroup* CreateGroupFromGroupID(byte feature, byte setid, byte type, uint16 spriteid, uint16 num_sprites)
{
	if (HASBIT(spriteid, 15)) return NewCallBackResultSpriteGroup(spriteid);

	if (spriteid >= _cur_grffile->spriteset_numsets) {
		grfmsg(1, "CreateGroupFromGroupID(0x%02X:0x%02X): Sprite set %u invalid, max %u", setid, type, spriteid, _cur_grffile->spriteset_numsets);
		return NULL;
	}

	/* Check if the sprite is within range. This can fail if the Action 0x01
	 * is skipped, as TTDPatch mandates that Action 0x02s must be processed.
	 * We don't have that rule, but must live by the Patch... */
	if (_cur_grffile->spriteset_start + spriteid * num_sprites + num_sprites > _cur_spriteid) {
		grfmsg(1, "CreateGroupFromGroupID(0x%02X:0x%02X): Real Sprite IDs 0x%04X - 0x%04X do not (all) exist (max 0x%04X), leaving empty",
				setid, type,
				_cur_grffile->spriteset_start + spriteid * num_sprites,
				_cur_grffile->spriteset_start + spriteid * num_sprites + num_sprites - 1, _cur_spriteid - 1);
		return NULL;
	}

	if (feature != _cur_grffile->spriteset_feature) {
		grfmsg(1, "CreateGroupFromGroupID(0x%02X:0x%02X): Sprite set feature 0x%02X does not match action feature 0x%02X, skipping",
				_cur_grffile->spriteset_feature, feature);
		return NULL;
	}

	return NewResultSpriteGroup(_cur_grffile->spriteset_start + spriteid * num_sprites, num_sprites);
}

/* Action 0x02 */
static void NewSpriteGroup(byte *buf, int len)
{
	/* <02> <feature> <set-id> <type/num-entries> <feature-specific-data...>
	 *
	 * B feature       see action 1
	 * B set-id        ID of this particular definition
	 * B type/num-entries
	 *                 if 80 or greater, this is a randomized or variational
	 *                 list definition, see below
	 *                 otherwise it specifies a number of entries, the exact
	 *                 meaning depends on the feature
	 * V feature-specific-data (huge mess, don't even look it up --pasky) */
	SpriteGroup *group = NULL;
	byte *bufend = buf + len;

	if (!check_length(len, 5, "NewSpriteGroup")) return;
	buf++;

	uint8 feature = grf_load_byte(&buf);
	uint8 setid   = grf_load_byte(&buf);
	uint8 type    = grf_load_byte(&buf);

	if (setid >= _cur_grffile->spritegroups_count) {
		/* Allocate memory for new sprite group references. */
		_cur_grffile->spritegroups = ReallocT(_cur_grffile->spritegroups, setid + 1);
		/* Initialise new space to NULL */
		for (; _cur_grffile->spritegroups_count < (setid + 1); _cur_grffile->spritegroups_count++)
			_cur_grffile->spritegroups[_cur_grffile->spritegroups_count] = NULL;
	}

	switch (type) {
		/* Deterministic Sprite Group */
		case 0x81: // Self scope, byte
		case 0x82: // Parent scope, byte
		case 0x85: // Self scope, word
		case 0x86: // Parent scope, word
		case 0x89: // Self scope, dword
		case 0x8A: // Parent scope, dword
		{
			byte varadjust;
			byte varsize;

			/* Check we can load the var size parameter */
			if (!check_length(bufend - buf, 1, "NewSpriteGroup (Deterministic) (1)")) return;

			group = AllocateSpriteGroup();
			group->type = SGT_DETERMINISTIC;
			group->g.determ.var_scope = HASBIT(type, 1) ? VSG_SCOPE_PARENT : VSG_SCOPE_SELF;

			switch (GB(type, 2, 2)) {
				default: NOT_REACHED();
				case 0: group->g.determ.size = DSG_SIZE_BYTE;  varsize = 1; break;
				case 1: group->g.determ.size = DSG_SIZE_WORD;  varsize = 2; break;
				case 2: group->g.determ.size = DSG_SIZE_DWORD; varsize = 4; break;
			}

			if (!check_length(bufend - buf, 5 + varsize, "NewSpriteGroup (Deterministic) (2)")) return;

			/* Loop through the var adjusts. Unfortunately we don't know how many we have
			 * from the outset, so we shall have to keep reallocing. */
			do {
				DeterministicSpriteGroupAdjust *adjust;

				if (group->g.determ.num_adjusts > 0) {
					if (!check_length(bufend - buf, 2 + varsize + 3, "NewSpriteGroup (Deterministic) (3)")) return;
				}

				group->g.determ.num_adjusts++;
				group->g.determ.adjusts = ReallocT(group->g.determ.adjusts, group->g.determ.num_adjusts);

				adjust = &group->g.determ.adjusts[group->g.determ.num_adjusts - 1];

				/* The first var adjust doesn't have an operation specified, so we set it to add. */
				adjust->operation = group->g.determ.num_adjusts == 1 ? DSGA_OP_ADD : (DeterministicSpriteGroupAdjustOperation)grf_load_byte(&buf);
				adjust->variable  = grf_load_byte(&buf);
				if (adjust->variable == 0x7E) {
					/* Link subroutine group */
					adjust->subroutine = GetGroupFromGroupID(setid, type, grf_load_byte(&buf));
				} else {
					adjust->parameter = IS_BYTE_INSIDE(adjust->variable, 0x60, 0x80) ? grf_load_byte(&buf) : 0;
				}

				varadjust = grf_load_byte(&buf);
				adjust->shift_num = GB(varadjust, 0, 5);
				adjust->type      = (DeterministicSpriteGroupAdjustType)GB(varadjust, 6, 2);
				adjust->and_mask  = grf_load_var(varsize, &buf);

				if (adjust->type != DSGA_TYPE_NONE) {
					adjust->add_val    = grf_load_var(varsize, &buf);
					adjust->divmod_val = grf_load_var(varsize, &buf);
				} else {
					adjust->add_val    = 0;
					adjust->divmod_val = 0;
				}

				/* Continue reading var adjusts while bit 5 is set. */
			} while (HASBIT(varadjust, 5));

			group->g.determ.num_ranges = grf_load_byte(&buf);
			if (group->g.determ.num_ranges > 0) group->g.determ.ranges = CallocT<DeterministicSpriteGroupRange>(group->g.determ.num_ranges);

			if (!check_length(bufend - buf, 2 + (2 + 2 * varsize) * group->g.determ.num_ranges, "NewSpriteGroup (Deterministic)")) return;

			for (uint i = 0; i < group->g.determ.num_ranges; i++) {
				group->g.determ.ranges[i].group = GetGroupFromGroupID(setid, type, grf_load_word(&buf));
				group->g.determ.ranges[i].low   = grf_load_var(varsize, &buf);
				group->g.determ.ranges[i].high  = grf_load_var(varsize, &buf);
			}

			group->g.determ.default_group = GetGroupFromGroupID(setid, type, grf_load_word(&buf));
			break;
		}

		/* Randomized Sprite Group */
		case 0x80: // Self scope
		case 0x83: // Parent scope
		{
			if (!check_length(bufend - buf, 7, "NewSpriteGroup (Randomized) (1)")) return;

			group = AllocateSpriteGroup();
			group->type = SGT_RANDOMIZED;
			group->g.random.var_scope = HASBIT(type, 1) ? VSG_SCOPE_PARENT : VSG_SCOPE_SELF;

			uint8 triggers = grf_load_byte(&buf);
			group->g.random.triggers       = GB(triggers, 0, 7);
			group->g.random.cmp_mode       = HASBIT(triggers, 7) ? RSG_CMP_ALL : RSG_CMP_ANY;
			group->g.random.lowest_randbit = grf_load_byte(&buf);
			group->g.random.num_groups     = grf_load_byte(&buf);
			group->g.random.groups = CallocT<const SpriteGroup*>(group->g.random.num_groups);

			if (!check_length(bufend - buf, 2 * group->g.random.num_groups, "NewSpriteGroup (Randomized) (2)")) return;

			for (uint i = 0; i < group->g.random.num_groups; i++) {
				group->g.random.groups[i] = GetGroupFromGroupID(setid, type, grf_load_word(&buf));
			}

			break;
		}

		/* Neither a variable or randomized sprite group... must be a real group */
		default:
		{


			switch (feature) {
				case GSF_TRAIN:
				case GSF_ROAD:
				case GSF_SHIP:
				case GSF_AIRCRAFT:
				case GSF_STATION:
				case GSF_CANAL:
				case GSF_CARGOS:
				{
					byte sprites     = _cur_grffile->spriteset_numents;
					byte num_loaded  = type;
					byte num_loading = grf_load_byte(&buf);

					if (_cur_grffile->spriteset_start == 0) {
						grfmsg(0, "NewSpriteGroup: No sprite set to work on! Skipping");
						return;
					}

					if (!check_length(bufend - buf, 2 * num_loaded + 2 * num_loading, "NewSpriteGroup (Real) (1)")) return;

					group = AllocateSpriteGroup();
					group->type = SGT_REAL;

					group->g.real.num_loaded  = num_loaded;
					group->g.real.num_loading = num_loading;
					if (num_loaded  > 0) group->g.real.loaded = CallocT<const SpriteGroup*>(num_loaded);
					if (num_loading > 0) group->g.real.loading = CallocT<const SpriteGroup*>(num_loading);

					grfmsg(6, "NewSpriteGroup: New SpriteGroup 0x%02X, %u views, %u loaded, %u loading",
							setid, sprites, num_loaded, num_loading);

					for (uint i = 0; i < num_loaded; i++) {
						uint16 spriteid = grf_load_word(&buf);
						group->g.real.loaded[i] = CreateGroupFromGroupID(feature, setid, type, spriteid, sprites);
						grfmsg(8, "NewSpriteGroup: + rg->loaded[%i]  = subset %u", i, spriteid);
					}

					for (uint i = 0; i < num_loading; i++) {
						uint16 spriteid = grf_load_word(&buf);
						group->g.real.loading[i] = CreateGroupFromGroupID(feature, setid, type, spriteid, sprites);
						grfmsg(8, "NewSpriteGroup: + rg->loading[%i] = subset %u", i, spriteid);
					}

					break;
				}

				case GSF_TOWNHOUSE: {
					byte sprites     = _cur_grffile->spriteset_numents;
					byte num_sprites = max((uint8)1, type);
					uint i;

					group = AllocateSpriteGroup();
					group->type = SGT_TILELAYOUT;
					group->g.layout.num_sprites = sprites;
					group->g.layout.dts = CallocT<DrawTileSprites>(1);

					/* Groundsprite */
					group->g.layout.dts->ground_sprite = grf_load_word(&buf);
					group->g.layout.dts->ground_pal    = grf_load_word(&buf);
					/* Remap transparent/colour modifier bits */
					if (HASBIT(group->g.layout.dts->ground_sprite, 14)) {
						CLRBIT(group->g.layout.dts->ground_sprite, 14);
						SETBIT(group->g.layout.dts->ground_sprite, PALETTE_MODIFIER_TRANSPARENT);
					}
					if (HASBIT(group->g.layout.dts->ground_sprite, 15)) {
						CLRBIT(group->g.layout.dts->ground_sprite, 15);
						SETBIT(group->g.layout.dts->ground_sprite, PALETTE_MODIFIER_COLOR);
					}
					if (HASBIT(group->g.layout.dts->ground_pal, 14)) {
						CLRBIT(group->g.layout.dts->ground_pal, 14);
						SETBIT(group->g.layout.dts->ground_sprite, SPRITE_MODIFIER_OPAQUE);
					}
					if (HASBIT(group->g.layout.dts->ground_pal, 15)) {
						/* Bit 31 set means this is a custom sprite, so rewrite it to the
						 * last spriteset defined. */
						SpriteID sprite = _cur_grffile->spriteset_start + GB(group->g.layout.dts->ground_sprite, 0, 14) * sprites;
						SB(group->g.layout.dts->ground_sprite, 0, SPRITE_WIDTH, sprite);
						CLRBIT(group->g.layout.dts->ground_pal, 15);
					}

					group->g.layout.dts->seq = CallocT<DrawTileSeqStruct>(num_sprites + 1);

					for (i = 0; i < num_sprites; i++) {
						DrawTileSeqStruct *seq = (DrawTileSeqStruct*)&group->g.layout.dts->seq[i];

						seq->image = grf_load_word(&buf);
						seq->pal   = grf_load_word(&buf);
						seq->delta_x = grf_load_byte(&buf);
						seq->delta_y = grf_load_byte(&buf);

						if (HASBIT(seq->image, 14)) {
							CLRBIT(seq->image, 14);
							SETBIT(seq->image, PALETTE_MODIFIER_TRANSPARENT);
						}
						if (HASBIT(seq->image, 15)) {
							CLRBIT(seq->image, 15);
							SETBIT(seq->image, PALETTE_MODIFIER_COLOR);
						}
						if (HASBIT(seq->pal, 14)) {
							CLRBIT(seq->pal, 14);
							SETBIT(seq->image, SPRITE_MODIFIER_OPAQUE);
						}
						if (HASBIT(seq->pal, 15)) {
							/* Bit 31 set means this is a custom sprite, so rewrite it to the
							 * last spriteset defined. */
							SpriteID sprite = _cur_grffile->spriteset_start + GB(seq->image, 0, 14) * sprites;
							SB(seq->image, 0, SPRITE_WIDTH, sprite);
							CLRBIT(seq->pal, 15);
						}

						if (type > 0) {
							seq->delta_z = grf_load_byte(&buf);
							if ((byte)seq->delta_z == 0x80) continue;
						}

						seq->size_x = grf_load_byte(&buf);
						seq->size_y = grf_load_byte(&buf);
						seq->size_z = grf_load_byte(&buf);
					}

					/* Set the terminator value. */
					((DrawTileSeqStruct*)group->g.layout.dts->seq)[i].delta_x = (byte)0x80;

					break;
				}

				/* Loading of Tile Layout and Production Callback groups would happen here */
				default: grfmsg(1, "NewSpriteGroup: Unsupported feature %d, skipping", feature);
			}
		}
	}

	_cur_grffile->spritegroups[setid] = group;
}

static CargoID TranslateCargo(uint8 feature, uint8 ctype)
{
	/* Special cargo types for purchase list and stations */
	if (feature == GSF_STATION && ctype == 0xFE) return CT_DEFAULT_NA;
	if (ctype == 0xFF) return CT_PURCHASE;

	if (_cur_grffile->cargo_max == 0) {
		/* No cargo table, so use bitnum values */
		if (ctype >= 32) {
			grfmsg(1, "TranslateCargo: Cargo bitnum %d out of range (max 31), skipping.", ctype);
			return CT_INVALID;
		}

		for (CargoID c = 0; c < NUM_CARGO; c++) {
			const CargoSpec *cs = GetCargo(c);
			if (!cs->IsValid()) continue;

			if (cs->bitnum == ctype) {
				grfmsg(6, "TranslateCargo: Cargo bitnum %d mapped to cargo type %d.", ctype, c);
				return c;
			}
		}

		grfmsg(5, "TranslateCargo: Cargo bitnum %d not available in this climate, skipping.", ctype);
		return CT_INVALID;
	}

	/* Check if the cargo type is out of bounds of the cargo translation table */
	if (ctype >= _cur_grffile->cargo_max) {
		grfmsg(1, "TranslateCargo: Cargo type %d out of range (max %d), skipping.", ctype, _cur_grffile->cargo_max - 1);
		return CT_INVALID;
	}

	/* Look up the cargo label from the translation table */
	CargoLabel cl = _cur_grffile->cargo_list[ctype];
	if (cl == 0) {
		grfmsg(5, "TranslateCargo: Cargo type %d not available in this climate, skipping.", ctype);
		return CT_INVALID;
	}

	ctype = GetCargoIDByLabel(cl);
	if (ctype == CT_INVALID) {
		grfmsg(5, "TranslateCargo: Cargo '%c%c%c%c' unsupported, skipping.", GB(cl, 24, 8), GB(cl, 16, 8), GB(cl, 8, 8), GB(cl, 0, 8));
		return CT_INVALID;
	}

	grfmsg(6, "TranslateCargo: Cargo '%c%c%c%c' mapped to cargo type %d.", GB(cl, 24, 8), GB(cl, 16, 8), GB(cl, 8, 8), GB(cl, 0, 8), ctype);
	return ctype;
}


static void VehicleMapSpriteGroup(byte *buf, byte feature, uint8 idcount, uint8 cidcount, bool wagover)
{
	static byte *last_engines;
	static int last_engines_count;

	if (!wagover) {
		if (last_engines_count != idcount) {
			last_engines = ReallocT(last_engines, idcount);
			last_engines_count = idcount;
		}
	} else {
		if (last_engines_count == 0) {
			grfmsg(0, "VehicleMapSpriteGroup: WagonOverride: No engine to do override with");
			return;
		}

		grfmsg(6, "VehicleMapSpriteGroup: WagonOverride: %u engines, %u wagons",
				last_engines_count, idcount);
	}

	for (uint i = 0; i < idcount; i++) {
		uint8 engine_id = buf[3 + i];
		uint8 engine = engine_id + _vehshifts[feature];
		byte *bp = &buf[4 + idcount];

		if (engine_id > _vehcounts[feature]) {
			grfmsg(0, "Id %u for feature 0x%02X is out of bounds", engine_id, feature);
			return;
		}

		grfmsg(7, "VehicleMapSpriteGroup: [%d] Engine %d...", i, engine);

		for (uint c = 0; c < cidcount; c++) {
			uint8 ctype = grf_load_byte(&bp);
			uint16 groupid = grf_load_word(&bp);

			grfmsg(8, "VehicleMapSpriteGroup: * [%d] Cargo type 0x%X, group id 0x%02X", c, ctype, groupid);

			if (groupid >= _cur_grffile->spritegroups_count || _cur_grffile->spritegroups[groupid] == NULL) {
				grfmsg(1, "VehicleMapSpriteGroup: Spriteset 0x%04X out of range 0x%X or empty, skipping", groupid, _cur_grffile->spritegroups_count);
				continue;
			}

			ctype = TranslateCargo(feature, ctype);
			if (ctype == CT_INVALID) continue;

			if (wagover) {
				SetWagonOverrideSprites(engine, ctype, _cur_grffile->spritegroups[groupid], last_engines, last_engines_count);
			} else {
				SetCustomEngineSprites(engine, ctype, _cur_grffile->spritegroups[groupid]);
				last_engines[i] = engine;
			}
		}
	}

	{
		byte *bp = &buf[4 + idcount + cidcount * 3];
		uint16 groupid = grf_load_word(&bp);

		grfmsg(8, "-- Default group id 0x%04X", groupid);

		for (uint i = 0; i < idcount; i++) {
			uint8 engine = buf[3 + i] + _vehshifts[feature];

			/* Don't tell me you don't love duplicated code! */
			if (groupid >= _cur_grffile->spritegroups_count || _cur_grffile->spritegroups[groupid] == NULL) {
				grfmsg(1, "FeatureMapSpriteGroup: Spriteset 0x%04X out of range 0x%X or empty, skipping",
				       groupid, _cur_grffile->spritegroups_count);
				continue;
			}

			if (wagover) {
				/* If the ID for this action 3 is the same as the vehicle ID,
 * this indicates we have a helicopter rotor override. */
				if (feature == GSF_AIRCRAFT && engine == last_engines[i]) {
					SetRotorOverrideSprites(engine, _cur_grffile->spritegroups[groupid]);
				} else {
					/* TODO: No multiple cargo types per vehicle yet. --pasky */
					SetWagonOverrideSprites(engine, CT_DEFAULT, _cur_grffile->spritegroups[groupid], last_engines, last_engines_count);
				}
			} else {
				SetCustomEngineSprites(engine, CT_DEFAULT, _cur_grffile->spritegroups[groupid]);
				SetEngineGRF(engine, _cur_grffile);
				last_engines[i] = engine;
			}
		}
	}
}


static void CanalMapSpriteGroup(byte *buf, uint8 idcount, uint8 cidcount)
{
	byte *bp = &buf[4 + idcount + cidcount * 3];
	uint16 groupid = grf_load_word(&bp);

	if (groupid >= _cur_grffile->spritegroups_count || _cur_grffile->spritegroups[groupid] == NULL) {
		grfmsg(1, "CanalMapSpriteGroup: Spriteset 0x%04X out of range 0x%X or empty, skipping.",
		       groupid, _cur_grffile->spritegroups_count);
		return;
	}

	for (uint i = 0; i < idcount; i++) {
		CanalFeature cf = (CanalFeature)buf[3 + i];

		if (cf >= CF_END) {
			grfmsg(1, "CanalMapSpriteGroup: Canal subset %d out of range, skipping", cf);
			continue;
		}

		_canal_sg[cf] = _cur_grffile->spritegroups[groupid];
	}
}


static void StationMapSpriteGroup(byte *buf, uint8 idcount, uint8 cidcount)
{
	for (uint i = 0; i < idcount; i++) {
		uint8 stid = buf[3 + i];
		StationSpec *statspec = _cur_grffile->stations[stid];
		byte *bp = &buf[4 + idcount];

		for (uint c = 0; c < cidcount; c++) {
			uint8 ctype = grf_load_byte(&bp);
			uint16 groupid = grf_load_word(&bp);

			if (groupid >= _cur_grffile->spritegroups_count || _cur_grffile->spritegroups[groupid] == NULL) {
				grfmsg(1, "StationMapSpriteGroup: Spriteset 0x%04X out of range 0x%X or empty, skipping",
				       groupid, _cur_grffile->spritegroups_count);
				continue;
			}

			ctype = TranslateCargo(GSF_STATION, ctype);
			if (ctype == CT_INVALID) continue;

			statspec->spritegroup[ctype] = _cur_grffile->spritegroups[groupid];
		}
	}

	{
		byte *bp = &buf[4 + idcount + cidcount * 3];
		uint16 groupid = grf_load_word(&bp);

		if (groupid >= _cur_grffile->spritegroups_count || _cur_grffile->spritegroups[groupid] == NULL) {
			grfmsg(1, "StationMapSpriteGroup: Spriteset 0x%04X out of range 0x%X or empty, skipping",
			       groupid, _cur_grffile->spritegroups_count);
			return;
		}

		for (uint i = 0; i < idcount; i++) {
			uint8 stid = buf[3 + i];
			StationSpec *statspec = _cur_grffile->stations[stid];

			statspec->spritegroup[CT_DEFAULT] = _cur_grffile->spritegroups[groupid];
			statspec->grffile = _cur_grffile;
			statspec->localidx = stid;
			SetCustomStationSpec(statspec);
		}
	}
}


static void TownHouseMapSpriteGroup(byte *buf, uint8 idcount, uint8 cidcount)
{
	byte *bp = &buf[4 + idcount + cidcount * 3];
	uint16 groupid = grf_load_word(&bp);

	if (groupid >= _cur_grffile->spritegroups_count || _cur_grffile->spritegroups[groupid] == NULL) {
		grfmsg(1, "TownHouseMapSpriteGroup: Spriteset 0x%04X out of range 0x%X or empty, skipping.",
		       groupid, _cur_grffile->spritegroups_count);
		return;
	}

	for (uint i = 0; i < idcount; i++) {
		uint8 hid = buf[3 + i];
		HouseSpec *hs = _cur_grffile->housespec[hid];

		if (hs == NULL) {
			grfmsg(1, "TownHouseMapSpriteGroup: Too many houses defined, skipping");
			return;
		}

		hs->spritegroup = _cur_grffile->spritegroups[groupid];
	}
}


static void CargoMapSpriteGroup(byte *buf, uint8 idcount, uint8 cidcount)
{
	byte *bp = &buf[4 + idcount + cidcount * 3];
	uint16 groupid = grf_load_word(&bp);

	if (groupid >= _cur_grffile->spritegroups_count || _cur_grffile->spritegroups[groupid] == NULL) {
		grfmsg(1, "CargoMapSpriteGroup: Spriteset 0x%04X out of range 0x%X or empty, skipping.",
		       groupid, _cur_grffile->spritegroups_count);
		return;
	}

	for (uint i = 0; i < idcount; i++) {
		CargoID cid = buf[3 + i];

		if (cid >= NUM_CARGO) {
			grfmsg(1, "CargoMapSpriteGroup: Cargo ID %d out of range, skipping");
			continue;
		}

		CargoSpec *cs = &_cargo[cid];
		cs->grfid = _cur_grffile->grfid;
		cs->group = _cur_grffile->spritegroups[groupid];
	}
}


/* Action 0x03 */
static void FeatureMapSpriteGroup(byte *buf, int len)
{
	/* <03> <feature> <n-id> <ids>... <num-cid> [<cargo-type> <cid>]... <def-cid>
	 * id-list    := [<id>] [id-list]
	 * cargo-list := <cargo-type> <cid> [cargo-list]
	 *
	 * B feature       see action 0
	 * B n-id          bits 0-6: how many IDs this definition applies to
	 *                 bit 7: if set, this is a wagon override definition (see below)
	 * B ids           the IDs for which this definition applies
	 * B num-cid       number of cargo IDs (sprite group IDs) in this definition
	 *                 can be zero, in that case the def-cid is used always
	 * B cargo-type    type of this cargo type (e.g. mail=2, wood=7, see below)
	 * W cid           cargo ID (sprite group ID) for this type of cargo
	 * W def-cid       default cargo ID (sprite group ID) */

	if (!check_length(len, 6, "FeatureMapSpriteGroup")) return;

	uint8 feature = buf[1];
	uint8 idcount = buf[2] & 0x7F;
	bool wagover = (buf[2] & 0x80) == 0x80;

	if (!check_length(len, 3 + idcount, "FeatureMapSpriteGroup")) return;

	/* If idcount is zero, this is a feature callback */
	if (idcount == 0) {
		grfmsg(2, "FeatureMapSpriteGroup: Feature callbacks not implemented yet");
		return;
	}

	uint8 cidcount = buf[3 + idcount];
	if (!check_length(len, 4 + idcount + cidcount * 3, "FeatureMapSpriteGroup")) return;

	grfmsg(6, "FeatureMapSpriteGroup: Feature %d, %d ids, %d cids, wagon override %d",
			feature, idcount, cidcount, wagover);

	if (_cur_grffile->spriteset_start == 0 || _cur_grffile->spritegroups == 0) {
		grfmsg(1, "FeatureMapSpriteGroup: No sprite set to work on! Skipping");
		return;
	}

	switch (feature) {
		case GSF_TRAIN:
		case GSF_ROAD:
		case GSF_SHIP:
		case GSF_AIRCRAFT:
			VehicleMapSpriteGroup(buf, feature, idcount, cidcount, wagover);
			return;

		case GSF_CANAL:
			CanalMapSpriteGroup(buf, idcount, cidcount);
			return;

		case GSF_STATION:
			StationMapSpriteGroup(buf, idcount, cidcount);
			return;

		case GSF_TOWNHOUSE:
			TownHouseMapSpriteGroup(buf, idcount, cidcount);
			return;

		case GSF_CARGOS:
			CargoMapSpriteGroup(buf, idcount, cidcount);
			return;

		default:
			grfmsg(1, "FeatureMapSpriteGroup: Unsupported feature %d, skipping", feature);
			return;
	}
}

/* Action 0x04 */
static void FeatureNewName(byte *buf, int len)
{
	/* <04> <veh-type> <language-id> <num-veh> <offset> <data...>
	 *
	 * B veh-type      see action 0 (as 00..07, + 0A
	 *                 But IF veh-type = 48, then generic text
	 * B language-id   If bit 6 is set, This is the extended language scheme,
	                   with up to 64 language.
	                   Otherwise, it is a mapping where set bits have meaning
	                   0 = american, 1 = english, 2 = german, 3 = french, 4 = spanish
	                   Bit 7 set means this is a generic text, not a vehicle one (or else)
	 * B num-veh       number of vehicles which are getting a new name
	 * B/W offset      number of the first vehicle that gets a new name
	 *                 Byte : ID of vehicle to change
	 *                 Word : ID of string to change/add
	 * S data          new texts, each of them zero-terminated, after
	 *                 which the next name begins. */

	bool new_scheme = _cur_grffile->grf_version >= 7;

	if (!check_length(len, 6, "FeatureNewName")) return;
	buf++;
	uint8 feature  = grf_load_byte(&buf);
	uint8 lang     = grf_load_byte(&buf);
	uint8 num      = grf_load_byte(&buf);
	bool generic   = HASBIT(lang, 7);
	uint16 id      = generic ? grf_load_word(&buf) : grf_load_byte(&buf);

	CLRBIT(lang, 7);

	if (feature <= GSF_AIRCRAFT && id < _vehcounts[feature]) {
		id += _vehshifts[feature];
	}
	uint16 endid = id + num;

	grfmsg(6, "FeatureNewName: About to rename engines %d..%d (feature %d) in language 0x%02X",
	               id, endid, feature, lang);

	len -= generic ? 6 : 5;

	for (; id < endid && len > 0; id++) {
		const char *name   = grf_load_string(&buf, len);
		size_t name_length = strlen(name) + 1;

		len -= (int)name_length;

		grfmsg(8, "FeatureNewName: 0x%04X <- %s", id, name);

		switch (feature) {
			case GSF_TRAIN:
			case GSF_ROAD:
			case GSF_SHIP:
			case GSF_AIRCRAFT:
				if (id < TOTAL_NUM_ENGINES) {
					StringID string = AddGRFString(_cur_grffile->grfid, id, lang, new_scheme, name, STR_8000_KIRBY_PAUL_TANK_STEAM + id);
					SetCustomEngineName(id, string);
				} else {
					AddGRFString(_cur_grffile->grfid, id, lang, new_scheme, name, id);
				}
				break;

			case GSF_TOWNHOUSE:
			default:
				switch (GB(id, 8, 8)) {
					case 0xC4: // Station class name
						if (_cur_grffile->stations == NULL || _cur_grffile->stations[GB(id, 0, 8)] == NULL) {
							grfmsg(1, "FeatureNewName: Attempt to name undefined station 0x%X, ignoring", GB(id, 0, 8));
						} else {
							StationClassID sclass = _cur_grffile->stations[GB(id, 0, 8)]->sclass;
							SetStationClassName(sclass, AddGRFString(_cur_grffile->grfid, id, lang, new_scheme, name, STR_UNDEFINED));
						}
						break;

					case 0xC5: // Station name
						if (_cur_grffile->stations == NULL || _cur_grffile->stations[GB(id, 0, 8)] == NULL) {
							grfmsg(1, "FeatureNewName: Attempt to name undefined station 0x%X, ignoring", GB(id, 0, 8));
						} else {
							_cur_grffile->stations[GB(id, 0, 8)]->name = AddGRFString(_cur_grffile->grfid, id, lang, new_scheme, name, STR_UNDEFINED);
						}
						break;

					case 0xC9: // House name
						if (_cur_grffile->housespec == NULL || _cur_grffile->housespec[GB(id, 0, 8)] == NULL) {
							grfmsg(1, "FeatureNewName: Attempt to name undefined house 0x%X, ignoring.", GB(id, 0, 8));
						} else {
							_cur_grffile->housespec[GB(id, 0, 8)]->building_name = AddGRFString(_cur_grffile->grfid, id, lang, new_scheme, name, STR_UNDEFINED);
						}
						break;

					case 0xD0:
					case 0xDC:
						AddGRFString(_cur_grffile->grfid, id, lang, new_scheme, name, STR_UNDEFINED);
						break;

					default:
						grfmsg(7, "FeatureNewName: Unsupported ID (0x%04X)", id);
						break;
				}
				break;

#if 0
				case GSF_CANAL :
				case GSF_BRIDGE :
					AddGRFString(_cur_spriteid, id, lang, name);
					switch (GB(id, 8, 8)) {
						case 0xC9: // House name
						default:
							grfmsg(7, "FeatureNewName: Unsupported ID (0x%04X)", id);
					}
					break;

				case GSF_INDUSTRIES :
				case 0x48 :   // for generic strings
					AddGRFString(_cur_spriteid, id, lang, name);
					break;
				default :
					grfmsg(7, "FeatureNewName: Unsupported feature (0x%02X)", feature);
					break;
#endif
		}
	}
}

/* Action 0x05 */
static void GraphicsNew(byte *buf, int len)
{
	/* <05> <graphics-type> <num-sprites> <other data...>
	 *
	 * B graphics-type What set of graphics the sprites define.
	 * E num-sprites   How many sprites are in this set?
	 * V other data    Graphics type specific data.  Currently unused. */
	/* TODO */

	SpriteID replace = 0;

	if (!check_length(len, 2, "GraphicsNew")) return;
	buf++;
	uint8 type = grf_load_byte(&buf);
	uint16 num = grf_load_extended(&buf);

	switch (type) {
		case 0x04: // Signal graphics
			if (num != 112 && num != 240) {
				grfmsg(1, "GraphicsNew: Signal graphics sprite count must be 112 or 240, skipping");
				return;
			}
			_signal_base = _cur_spriteid;
			break;

		case 0x05: // Catenary graphics
			if (num != 48) {
				grfmsg(1, "GraphicsNew: Catenary graphics sprite count must be 48, skipping");
				return;
			}
			replace = SPR_ELRAIL_BASE + 3;
			break;

		case 0x06: // Foundations
			if (num != 74) {
				grfmsg(1, "GraphicsNew: Foundation graphics sprite count must be 74, skipping");
				return;
			}
			replace = SPR_SLOPES_BASE;
			break;

		case 0x08: // Canal graphics
			if (num != 65) {
				grfmsg(1, "GraphicsNew: Canal graphics sprite count must be 65, skipping");
				return;
			}
			replace = SPR_CANALS_BASE + 5;
			break;

		case 0x09: // One way graphics
			if (num != 6) {
				grfmsg(1, "GraphicsNew: One way road graphics sprite count must be 6, skipping");
				return;
			}
			replace = SPR_ONEWAY_BASE;
			break;

		case 0x0A: // 2CC colour maps
			if (num != 256) {
				grfmsg(1, "GraphicsNew: 2CC colour maps sprite count must be 256, skipping");
				return;
			}
			replace = SPR_2CCMAP_BASE;
			break;

		case 0x0B: // tramways
			if (num != 113) {
				grfmsg(1, "GraphicsNews: Tramway graphics sprite count must be 113, skipping");
				return;
			}
			replace = SPR_TRAMWAY_BASE;
			break;

		case 0x0D: // Coast graphics
			if (num != 16) {
				grfmsg(1, "GraphicsNew: Coast graphics sprite count must be 16, skipping");
				return;
			}
			_coast_base = _cur_spriteid;
			break;

		case 0x10: // New airport sprites
			if (num != 15) {
				grfmsg(1, "GraphicsNew: Airport graphics sprite count must be 15, skipping");
				return;
			}
			replace = SPR_AIRPORTX_BASE;
			break;

		case 0x11: // Road stop sprites
			if (num != 8) {
				grfmsg(1, "GraphicsNew: Road stop graphics sprite count must be 8, skipping");
				return;
			}
			replace = SPR_ROADSTOP_BASE;
			break;

		default:
			grfmsg(2, "GraphicsNew: Custom graphics (type 0x%02X) sprite block of length %u (unimplemented, ignoring)",
					type, num);
			return;
	}

	if (replace == 0) {
		grfmsg(2, "GraphicsNew: Loading %u sprites of type 0x%02X at SpriteID 0x%04X", num, type, _cur_spriteid);
	} else {
		grfmsg(2, "GraphicsNew: Replacing %u sprites of type 0x%02X at SpriteID 0x%04X", num, type, replace);
	}

	for (; num > 0; num--) {
		LoadNextSprite(replace == 0 ? _cur_spriteid++ : replace++, _file_index);
		_nfo_line++;
	}
}

/* Action 0x05 (SKIP) */
static void SkipAct5(byte *buf, int len)
{
	if (!check_length(len, 2, "SkipAct5")) return;
	buf++;

	/* Ignore type byte */
	grf_load_byte(&buf);

	/* Skip the sprites of this action */
	_skip_sprites = grf_load_extended(&buf);

	grfmsg(3, "SkipAct5: Skipping %d sprites", _skip_sprites);
}

static uint32 GetParamVal(byte param, uint32 *cond_val)
{
	switch (param) {
		case 0x81: // current year
			return clamp(_cur_year, ORIGINAL_BASE_YEAR, ORIGINAL_MAX_YEAR) - ORIGINAL_BASE_YEAR;

		case 0x83: // current climate, 0=temp, 1=arctic, 2=trop, 3=toyland
			return _opt.landscape;

		case 0x84: // GRF loading stage
			return (_cur_stage > GLS_INIT) | ((_cur_stage == GLS_ACTIVATION) << 9);

		case 0x85: // TTDPatch flags, only for bit tests
			if (cond_val == NULL) {
				/* Supported in Action 0x07 and 0x09, not 0x0D */
				return 0;
			} else {
				uint32 param_val = _ttdpatch_flags[*cond_val / 0x20];
				*cond_val %= 0x20;
				return param_val;
			}

		case 0x86: // road traffic side, bit 4 clear=left, set=right
			return _opt.road_side << 4;

		case 0x88: // GRF ID check
			return 0;

		case 0x8B: { // TTDPatch version
			uint major    = 2;
			uint minor    = 6;
			uint revision = 0; // special case: 2.0.1 is 2.0.10
			uint build    = 1210;
			return (major << 24) | (minor << 20) | (revision << 16) | build;
		}

		case 0x8D: // TTD Version, 00=DOS, 01=Windows
			return !_use_dos_palette;

		case 0x8E: // Y-offset for train sprites
			return _traininfo_vehicle_pitch;

		case 0x92: // Game mode
			return _game_mode;

		case 0x9A: // Always -1
			return UINT_MAX;

		case 0x9D: // TTD Platform, 00=TTDPatch, 01=OpenTTD
			return 1;

		case 0x9E: // Miscellaneous GRF features
			return _misc_grf_features;

		default:
			/* GRF Parameter */
			if (param < 0x80) return _cur_grffile->param[param];

			/* In-game variable. */
			grfmsg(1, "Unsupported in-game variable 0x%02X", param);
			return UINT_MAX;
	}
}

/* Action 0x06 */
static void CfgApply(byte *buf, int len)
{
	/* <06> <param-num> <param-size> <offset> ... <FF>
	 *
	 * B param-num     Number of parameter to substitute (First = "zero")
	 *                 Ignored if that parameter was not specified in newgrf.cfg
	 * B param-size    How many bytes to replace.  If larger than 4, the
	 *                 bytes of the following parameter are used.  In that
	 *                 case, nothing is applied unless *all* parameters
	 *                 were specified.
	 * B offset        Offset into data from beginning of next sprite
	 *                 to place where parameter is to be stored. */

	/* Preload the next sprite */
	uint32 pos = FioGetPos();
	uint16 num = FioReadWord();
	uint8 type = FioReadByte();

	/* Check if the sprite is a pseudo sprite. We can't operate on real sprites. */
	if (type == 0xFF) {
		_preload_sprite = MallocT<byte>(num);
		FioReadBlock(_preload_sprite, num);
	}

	/* Reset the file position to the start of the next sprite */
	FioSeekTo(pos, SEEK_SET);

	if (type != 0xFF) {
		grfmsg(2, "CfgApply: Ignoring (next sprite is real, unsupported)");
		return;
	}

	/* Now perform the Action 0x06 on our data. */
	buf++;

	for (;;) {
		uint i;
		uint param_num;
		uint param_size;
		uint offset;
		bool add_value;

		/* Read the parameter to apply. 0xFF indicates no more data to change. */
		param_num = grf_load_byte(&buf);
		if (param_num == 0xFF) break;

		/* Get the size of the parameter to use. If the size covers multiple
		 * double words, sequential parameter values are used. */
		param_size = grf_load_byte(&buf);

		/* Bit 7 of param_size indicates we should add to the original value
		 * instead of replacing it. */
		add_value  = HASBIT(param_size, 7);
		param_size = GB(param_size, 0, 7);

		/* Where to apply the data to within the pseudo sprite data. */
		offset     = grf_load_extended(&buf);

		/* If the parameter is a GRF parameter (not an internal variable) check
		 * if it (and all further sequential parameters) has been defined. */
		if (param_num < 0x80 && (param_num + (param_size - 1) / 4) >= _cur_grffile->param_end) {
			grfmsg(2, "CfgApply: Ignoring (param %d not set)", (param_num + (param_size - 1) / 4));
			break;
		}

		grfmsg(8, "CfgApply: Applying %u bytes from parameter 0x%02X at offset 0x%04X", param_size, param_num, offset);

		bool carry = false;
		for (i = 0; i < param_size; i++) {
			uint32 value = GetParamVal(param_num + i / 4, NULL);
			/* Reset carry flag for each iteration of the variable (only really
			 * matters if param_size is greater than 4) */
			if (i == 0) carry = false;

			if (add_value) {
				uint new_value = _preload_sprite[offset + i] + GB(value, (i % 4) * 8, 8) + (carry ? 1 : 0);
				_preload_sprite[offset + i] = GB(new_value, 0, 8);
				/* Check if the addition overflowed */
				carry = new_value >= 256;
			} else {
				_preload_sprite[offset + i] = GB(value, (i % 4) * 8, 8);
			}
		}
	}
}

/* Action 0x07 */
/* Action 0x09 */
static void SkipIf(byte *buf, int len)
{
	/* <07/09> <param-num> <param-size> <condition-type> <value> <num-sprites>
	 *
	 * B param-num
	 * B param-size
	 * B condition-type
	 * V value
	 * B num-sprites */
	/* TODO: More params. More condition types. */
	uint32 cond_val = 0;
	uint32 mask = 0;
	bool result;

	if (!check_length(len, 6, "SkipIf")) return;
	buf++;
	uint8 param     = grf_load_byte(&buf);
	uint8 paramsize = grf_load_byte(&buf);
	uint8 condtype  = grf_load_byte(&buf);

	if (condtype < 2) {
		/* Always 1 for bit tests, the given value should be ignored. */
		paramsize = 1;
	}

	switch (paramsize) {
		case 4: cond_val = grf_load_dword(&buf); mask = 0xFFFFFFFF; break;
		case 2: cond_val = grf_load_word(&buf);  mask = 0x0000FFFF; break;
		case 1: cond_val = grf_load_byte(&buf);  mask = 0x000000FF; break;
		default: break;
	}

	if (param < 0x80 && _cur_grffile->param_end <= param) {
		grfmsg(7, "SkipIf: Param %d undefined, skipping test", param);
		return;
	}

	uint32 param_val = GetParamVal(param, &cond_val);

	grfmsg(7, "SkipIf: Test condtype %d, param 0x%08X, condval 0x%08X", condtype, param_val, cond_val);

	if (param == 0x88) {
		/* GRF ID checks */

		const GRFConfig *c = GetGRFConfig(cond_val);

		if (condtype != 10 && c == NULL) {
			grfmsg(7, "SkipIf: GRFID 0x%08X unknown, skipping test", BSWAP32(cond_val));
			return;
		}

		switch (condtype) {
			/* Tests 6 to 10 are only for param 0x88, GRFID checks */
			case 6: // Is GRFID active?
				result = c->status == GCS_ACTIVATED;
				break;

			case 7: // Is GRFID non-active?
				result = c->status != GCS_ACTIVATED;
				break;

			case 8: // GRFID is not but will be active?
				result = c->status == GCS_INITIALISED;
				break;

			case 9: // GRFID is or will be active?
				result = c->status == GCS_ACTIVATED || c->status == GCS_INITIALISED;
				break;

			case 10: // GRFID is not nor will be active
				/* This is the only condtype that doesn't get ignored if the GRFID is not found */
				result = c == NULL || c->flags == GCS_DISABLED || c->status == GCS_NOT_FOUND;
				break;

			default: grfmsg(1, "SkipIf: Unsupported GRF test %d. Ignoring", condtype); return;
		}
	} else {
		/* Parameter or variable tests */
		switch (condtype) {
			case 0: result = !!(param_val & (1 << cond_val));
				break;
			case 1: result = !(param_val & (1 << cond_val));
				break;
			case 2: result = (param_val & mask) == cond_val;
				break;
			case 3: result = (param_val & mask) != cond_val;
				break;
			case 4: result = (param_val & mask) < cond_val;
				break;
			case 5: result = (param_val & mask) > cond_val;
				break;
			case 11: result = GetCargoIDByLabel(BSWAP32(cond_val)) == CT_INVALID;
				break;
			case 12: result = GetCargoIDByLabel(BSWAP32(cond_val)) != CT_INVALID;
				break;

			default: grfmsg(1, "SkipIf: Unsupported test %d. Ignoring", condtype); return;
		}
	}

	if (!result) {
		grfmsg(2, "SkipIf: Not skipping sprites, test was false");
		return;
	}

	uint8 numsprites = grf_load_byte(&buf);

	/* numsprites can be a GOTO label if it has been defined in the GRF
	 * file. The jump will always be the first matching label that follows
	 * the current nfo_line. If no matching label is found, the first matching
	 * label in the file is used. */
	GRFLabel *choice = NULL;
	for (GRFLabel *label = _cur_grffile->label; label != NULL; label = label->next) {
		if (label->label != numsprites) continue;

		/* Remember a goto before the current line */
		if (choice == NULL) choice = label;
		/* If we find a label here, this is definitely good */
		if (label->nfo_line > _nfo_line) {
			choice = label;
			break;
		}
	}

	if (choice != NULL) {
		grfmsg(2, "SkipIf: Jumping to label 0x%0X at line %d, test was true", choice->label, choice->nfo_line);
		FioSeekTo(choice->pos, SEEK_SET);
		_nfo_line = choice->nfo_line;
		return;
	}

	grfmsg(2, "SkipIf: Skipping %d sprites, test was true", numsprites);
	_skip_sprites = numsprites;
	if (_skip_sprites == 0) {
		/* Zero means there are no sprites to skip, so
		 * we use -1 to indicate that all further
		 * sprites should be skipped. */
		_skip_sprites = -1;

		/* If an action 8 hasn't been encountered yet, disable the grf. */
		if (_cur_stage != GLS_RESERVE && _cur_grfconfig->status != GCS_ACTIVATED) _cur_grfconfig->status = GCS_DISABLED;
	}
}


/* Action 0x08 (GLS_FILESCAN) */
static void ScanInfo(byte *buf, int len)
{
	if (!check_length(len, 8, "Info")) return;
	buf++;
	grf_load_byte(&buf);
	uint32 grfid  = grf_load_dword(&buf);

	_cur_grfconfig->grfid = grfid;

	/* GRF IDs starting with 0xFF are reserved for internal TTDPatch use */
	if (GB(grfid, 24, 8) == 0xFF) SETBIT(_cur_grfconfig->flags, GCF_SYSTEM);

	len -= 6;
	const char *name = grf_load_string(&buf, len);
	_cur_grfconfig->name = TranslateTTDPatchCodes(name);

	len -= strlen(name) + 1;
	if (len > 0) {
		const char *info = grf_load_string(&buf, len);
		_cur_grfconfig->info = TranslateTTDPatchCodes(info);
	}

	/* GLS_INFOSCAN only looks for the action 8, so we can skip the rest of the file */
	_skip_sprites = -1;
}

/* Action 0x08 */
static void GRFInfo(byte *buf, int len)
{
	/* <08> <version> <grf-id> <name> <info>
	 *
	 * B version       newgrf version, currently 06
	 * 4*B grf-id      globally unique ID of this .grf file
	 * S name          name of this .grf set
	 * S info          string describing the set, and e.g. author and copyright */

	if (!check_length(len, 8, "GRFInfo")) return;
	buf++;
	uint8 version    = grf_load_byte(&buf);
	uint32 grfid     = grf_load_dword(&buf);
	const char *name = grf_load_string(&buf, len - 6);

	_cur_grffile->grfid = grfid;
	_cur_grffile->grf_version = version;
	_cur_grfconfig->status = _cur_stage < GLS_ACTIVATION ? GCS_INITIALISED : GCS_ACTIVATED;

	/* Do swap the GRFID for displaying purposes since people expect that */
	DEBUG(grf, 1, "GRFInfo: Loaded GRFv%d set %08lX - %s", version, BSWAP32(grfid), name);
}

/* Action 0x0A */
static void SpriteReplace(byte *buf, int len)
{
	/* <0A> <num-sets> <set1> [<set2> ...]
	 * <set>: <num-sprites> <first-sprite>
	 *
	 * B num-sets      How many sets of sprites to replace.
	 * Each set:
	 * B num-sprites   How many sprites are in this set
	 * W first-sprite  First sprite number to replace */

	buf++; // skip action byte
	uint8 num_sets = grf_load_byte(&buf);

	for (uint i = 0; i < num_sets; i++) {
		uint8 num_sprites = grf_load_byte(&buf);
		uint16 first_sprite = grf_load_word(&buf);

		grfmsg(2, "SpriteReplace: [Set %d] Changing %d sprites, beginning with %d",
			i, num_sprites, first_sprite
		);

		for (uint j = 0; j < num_sprites; j++) {
			LoadNextSprite(first_sprite + j, _file_index); // XXX
			_nfo_line++;
		}
	}
}

/* Action 0x0A (SKIP) */
static void SkipActA(byte *buf, int len)
{
	buf++;
	uint8 num_sets = grf_load_byte(&buf);

	for (uint i = 0; i < num_sets; i++) {
		/* Skip the sprites this replaces */
		_skip_sprites += grf_load_byte(&buf);
		/* But ignore where they go */
		grf_load_word(&buf);
	}

	grfmsg(3, "SkipActA: Skipping %d sprites", _skip_sprites);
}

/* Action 0x0B */
static void GRFLoadError(byte *buf, int len)
{
	/* <0B> <severity> <language-id> <message-id> [<message...> 00] [<data...>] 00 [<parnum>]
	 *
	 * B severity      00: notice, contine loading grf file
	 *                 01: warning, continue loading grf file
	 *                 02: error, but continue loading grf file, and attempt
	 *                     loading grf again when loading or starting next game
	 *                 03: error, abort loading and prevent loading again in
	 *                     the future (only when restarting the patch)
	 * B language-id   see action 4, use 1F for built-in error messages
	 * B message-id    message to show, see below
	 * S message       for custom messages (message-id FF), text of the message
	 *                 not present for built-in messages.
	 * V data          additional data for built-in (or custom) messages
	 * B parnum        parameter numbers to be shown in the message (maximum of 2) */

	static const StringID msgstr[] = {
		STR_NEWGRF_ERROR_VERSION_NUMBER,
		STR_NEWGRF_ERROR_DOS_OR_WINDOWS,
		STR_NEWGRF_ERROR_UNSET_SWITCH,
		STR_NEWGRF_ERROR_INVALID_PARAMETER,
		STR_NEWGRF_ERROR_LOAD_BEFORE,
		STR_NEWGRF_ERROR_LOAD_AFTER
	};

	static const StringID sevstr[] = {
		STR_NEWGRF_ERROR_MSG_INFO,
		STR_NEWGRF_ERROR_MSG_WARNING,
		STR_NEWGRF_ERROR_MSG_ERROR,
		STR_NEWGRF_ERROR_MSG_FATAL
	};

	/* AddGRFString expects the string to be referred to by an id in the newgrf
	 * file. Errors messages are never referred to however, so invent ids that
	 * are unlikely to be reached in a newgrf file so they don't overwrite
	 * anything else. */
	enum {
		MESSAGE_STRING_ID = MAX_UVALUE(StringID) - 1,
		MESSAGE_DATA_ID   = MAX_UVALUE(StringID)
	};

	if (!check_length(len, 6, "GRFLoadError")) return;

	/* For now we can only show one message per newgrf file. */
	if (_cur_grfconfig->error != NULL) return;

	buf++; // Skip the action byte.
	byte severity   = grf_load_byte(&buf);
	byte lang       = grf_load_byte(&buf);
	byte message_id = grf_load_byte(&buf);
	len -= 4;

	/* Skip the error until the activation stage unless bit 7 of the severity
	 * is set. */
	if (!HASBIT(severity, 7) && _cur_stage < GLS_ACTIVATION) {
		grfmsg(7, "GRFLoadError: Skipping non-fatal GRFLoadError in stage 1");
		return;
	}
	CLRBIT(severity, 7);

	if (severity >= lengthof(sevstr)) {
		grfmsg(7, "GRFLoadError: Invalid severity id %d. Setting to 2 (non-fatal error).", severity);
		severity = 2;
	} else if (severity == 3) {
		/* This is a fatal error, so make sure the GRF is deactivated and no
		 * more of it gets loaded. */
		_cur_grfconfig->status = GCS_DISABLED;

		_skip_sprites = -1;
	}

	if (message_id >= lengthof(msgstr) && message_id != 0xFF) {
		grfmsg(7, "GRFLoadError: Invalid message id.");
		return;
	}

	if (len <= 1) {
		grfmsg(7, "GRFLoadError: No message data supplied.");
		return;
	}

	bool new_scheme = _cur_grffile->grf_version >= 7;
	GRFError *error = CallocT<GRFError>(1);

	error->severity = sevstr[severity];

	if (message_id == 0xFF) {
		/* This is a custom error message. */
		const char *message = grf_load_string(&buf, len);
		len -= (strlen(message) + 1);

		error->message = AddGRFString(_cur_grffile->grfid, MESSAGE_STRING_ID, lang, new_scheme, message, STR_UNDEFINED);
	} else {
		error->message = msgstr[message_id];
	}

	if (len > 0) {
		const char *data = grf_load_string(&buf, len);
		len -= (strlen(data) + 1);

		error->data = AddGRFString(_cur_grffile->grfid, MESSAGE_DATA_ID, lang, new_scheme, data, STR_UNDEFINED);
	}

	/* Only two parameter numbers can be used in the string. */
	uint i = 0;
	for (; i < 2 && len > 0; i++) {
		error->param_number[i] = grf_load_byte(&buf);
		len--;
	}
	error->num_params = i;

	_cur_grfconfig->error = error;
}

/* Action 0x0C */
static void GRFComment(byte *buf, int len)
{
	/* <0C> [<ignored...>]
	 *
	 * V ignored       Anything following the 0C is ignored */

	if (len == 1) return;

	int text_len = len - 1;
	const char *text = (const char*)(buf + 1);
	grfmsg(2, "GRFComment: %.*s", text_len, text);
}

/* Action 0x0D (GLS_SAFETYSCAN) */
static void SafeParamSet(byte *buf, int len)
{
	if (!check_length(len, 5, "SafeParamSet")) return;
	buf++;
	uint8 target = grf_load_byte(&buf);

	/* Only writing GRF parameters is considered safe */
	if (target < 0x80) return;

	/* GRM could be unsafe, but as here it can only happen after other GRFs
	 * are loaded, it should be okay. If the GRF tried to use the slots it
	 * reserved, it would be marked unsafe anyway. GRM for (e.g. bridge)
	 * sprites  is considered safe. */

	SETBIT(_cur_grfconfig->flags, GCF_UNSAFE);

	/* Skip remainder of GRF */
	_skip_sprites = -1;
}


static uint32 GetPatchVariable(uint8 param)
{
	switch (param) {
		/* start year - 1920 */
		case 0x0B: return max(_patches.starting_year, ORIGINAL_BASE_YEAR) - ORIGINAL_BASE_YEAR;
		/* freight trains weight factor */
		case 0x0E: return _patches.freight_trains;
		/* empty wagon speed increase */
		case 0x0F: return 0;
		/* plane speed factor */
		case 0x10: return 4;
		/* 2CC colormap base sprite */
		case 0x11: return SPR_2CCMAP_BASE;

		default:
			grfmsg(2, "ParamSet: Unknown Patch variable 0x%02X.", param);
			return 0;
	}
}


/* Action 0x0D */
static void ParamSet(byte *buf, int len)
{
	/* <0D> <target> <operation> <source1> <source2> [<data>]
	 *
	 * B target        parameter number where result is stored
	 * B operation     operation to perform, see below
	 * B source1       first source operand
	 * B source2       second source operand
	 * D data          data to use in the calculation, not necessary
	 *                 if both source1 and source2 refer to actual parameters
	 *
	 * Operations
	 * 00      Set parameter equal to source1
	 * 01      Addition, source1 + source2
	 * 02      Subtraction, source1 - source2
	 * 03      Unsigned multiplication, source1 * source2 (both unsigned)
	 * 04      Signed multiplication, source1 * source2 (both signed)
	 * 05      Unsigned bit shift, source1 by source2 (source2 taken to be a
	 *         signed quantity; left shift if positive and right shift if
	 *         negative, source1 is unsigned)
	 * 06      Signed bit shift, source1 by source2
	 *         (source2 like in 05, and source1 as well)
	 */

	if (!check_length(len, 5, "ParamSet")) return;
	buf++;
	uint8 target = grf_load_byte(&buf);
	uint8 oper   = grf_load_byte(&buf);
	uint32 src1  = grf_load_byte(&buf);
	uint32 src2  = grf_load_byte(&buf);

	uint32 data = 0;
	if (len >= 8) data = grf_load_dword(&buf);

	/* You can add 80 to the operation to make it apply only if the target
	 * is not defined yet.  In this respect, a parameter is taken to be
	 * defined if any of the following applies:
	 * - it has been set to any value in the newgrf(w).cfg parameter list
	 * - it OR A PARAMETER WITH HIGHER NUMBER has been set to any value by
	 *   an earlier action D */
	if (HASBIT(oper, 7)) {
		if (target < 0x80 && target < _cur_grffile->param_end) {
			grfmsg(7, "ParamSet: Param %u already defined, skipping", target);
			return;
		}

		oper = GB(oper, 0, 7);
	}

	if (src2 == 0xFE) {
		if (GB(data, 0, 8) == 0xFF) {
			if (data == 0x0000FFFF) {
				/* Patch variables */
				src1 = GetPatchVariable(src1);
			} else {
				/* GRF Resource Management */
				if (_cur_stage != GLS_ACTIVATION) {
					/* Ignore GRM during initialization */
					src1 = 0;
				} else {
					uint8  op      = src1;
					uint8  feature = GB(data, 8, 8);
					uint16 count   = GB(data, 16, 16);

					switch (feature) {
						case 0x00: // Trains
						case 0x01: // Road Vehicles
						case 0x02: // Ships
						case 0x03: // Aircraft
						{
							uint start = 0;
							uint size  = 0;
							uint shift = _vehshifts[feature];

							if (op == 6) {
								/* Return GRFID of set that reserved ID */
								src1 = _grm_engines[shift + _cur_grffile->param[target]];
								break;
							}

							/* With an operation of 2 or 3, we want to reserve a specific block of IDs */
							if (op == 2 || op == 3) start = _cur_grffile->param[target];

							for (uint i = start; i < _vehcounts[feature]; i++) {
								if (_grm_engines[shift + i] == 0) {
									size++;
								} else {
									if (op == 2 || op == 3) break;
									start = i + 1;
									size = 0;
								}

								if (size == count) break;
							}

							if (size == count) {
								/* Got the slot... */
								if (op == 0 || op == 3) {
									grfmsg(2, "ParamSet: GRM: Reserving %d vehicles at %d", count, start);
									for (uint i = 0; i < count; i++) _grm_engines[shift + start + i] = _cur_grffile->grfid;
								}
								src1 = start;
							} else {
								/* Unable to allocate */
								if (op != 4 && op != 5) {
									/* Deactivate GRF */
									grfmsg(0, "ParamSet: GRM: Unable to allocate %d vehicles, deactivating", count);
									_cur_grfconfig->status = GCS_DISABLED;

									_skip_sprites = -1;
									return;
								}

								grfmsg(1, "ParamSet: GRM: Unable to allocate %d vehicles", count);
								src1 = UINT_MAX;
							}
							break;
						}

						case 0x08: // General sprites
							switch (op) {
								case 0:
									/* Check if the allocated sprites will fit below the original sprite limit */
									if (_cur_spriteid + count >= 16384) {
										grfmsg(0, "ParamSet: GRM: Unable to allocate %d sprites; try changing NewGRF order", count);
										_cur_grfconfig->status = GCS_DISABLED;

										_skip_sprites = -1;
										return;
									}

									/* 'Reserve' space at the current sprite ID */
									src1 = _cur_spriteid;
									_cur_spriteid += count;
									break;

								case 1:
									src1 = _cur_spriteid;
									break;

								default:
									grfmsg(1, "ParamSet: GRM: Unsupported operation %d for general sprites", op);
									return;
							}
							break;

						default: grfmsg(1, "ParamSet: GRM: Unsupported feature 0x%X", feature); return;
					}
				}
			}
		} else {
			/* Read another GRF File's parameter */
			const GRFFile *file = GetFileByGRFID(data);
			if (file == NULL || src1 >= file->param_end) {
				src1 = 0;
			} else {
				src1 = file->param[src1];
			}
		}
	} else {
		/* The source1 and source2 operands refer to the grf parameter number
		 * like in action 6 and 7.  In addition, they can refer to the special
		 * variables available in action 7, or they can be FF to use the value
		 * of <data>.  If referring to parameters that are undefined, a value
		 * of 0 is used instead.  */
		src1 = (src1 == 0xFF) ? data : GetParamVal(src1, NULL);
		src2 = (src2 == 0xFF) ? data : GetParamVal(src2, NULL);
	}

	/* TODO: You can access the parameters of another GRF file by using
	 * source2=FE, source1=the other GRF's parameter number and data=GRF
	 * ID.  This is only valid with operation 00 (set).  If the GRF ID
	 * cannot be found, a value of 0 is used for the parameter value
	 * instead. */

	uint32 res;
	switch (oper) {
		case 0x00:
			res = src1;
			break;

		case 0x01:
			res = src1 + src2;
			break;

		case 0x02:
			res = src1 - src2;
			break;

		case 0x03:
			res = src1 * src2;
			break;

		case 0x04:
			res = (int32)src1 * (int32)src2;
			break;

		case 0x05:
			if ((int32)src2 < 0) {
				res = src1 >> -(int32)src2;
			} else {
				res = src1 << src2;
			}
			break;

		case 0x06:
			if ((int32)src2 < 0) {
				res = (int32)src1 >> -(int32)src2;
			} else {
				res = (int32)src1 << src2;
			}
			break;

		case 0x07: // Bitwise AND
			res = src1 & src2;
			break;

		case 0x08: // Bitwise OR
			res = src1 | src2;
			break;

		case 0x09: // Unsigned division
			if (src2 == 0) {
				res = src1;
			} else {
				res = src1 / src2;
			}
			break;

		case 0x0A: // Signed divison
			if (src2 == 0) {
				res = src1;
			} else {
				res = (int32)src1 / (int32)src2;
			}
			break;

		case 0x0B: // Unsigned modulo
			if (src2 == 0) {
				res = src1;
			} else {
				res = src1 % src2;
			}
			break;

		case 0x0C: // Signed modulo
			if (src2 == 0) {
				res = src1;
			} else {
				res = (int32)src1 % (int32)src2;
			}
			break;

		default: grfmsg(0, "ParamSet: Unknown operation %d, skipping", oper); return;
	}

	switch (target) {
		case 0x8E: // Y-Offset for train sprites
			_traininfo_vehicle_pitch = res;
			break;

		/* @todo implement */
		case 0x8F: // Rail track type cost factors
		case 0x93: // Tile refresh offset to left
		case 0x94: // Tile refresh offset to right
		case 0x95: // Tile refresh offset upwards
		case 0x96: // Tile refresh offset downwards
		case 0x97: // Snow line height
		case 0x99: // Global ID offset
			grfmsg(7, "ParamSet: Skipping unimplemented target 0x%02X", target);
			break;

		case 0x9E: // Miscellaneous GRF features
			_misc_grf_features = res;
			/* Set train list engine width */
			_traininfo_vehicle_width = HasGrfMiscBit(GMB_TRAIN_WIDTH_32_PIXELS) ? 32 : 29;
			break;

		default:
			if (target < 0x80) {
				_cur_grffile->param[target] = res;
				if (target + 1U > _cur_grffile->param_end) _cur_grffile->param_end = target + 1;
			} else {
				grfmsg(7, "ParamSet: Skipping unknown target 0x%02X", target);
			}
			break;
	}
}

/* Action 0x0E (GLS_SAFETYSCAN) */
static void SafeGRFInhibit(byte *buf, int len)
{
	/* <0E> <num> <grfids...>
	 *
	 * B num           Number of GRFIDs that follow
	 * D grfids        GRFIDs of the files to deactivate */

	if (!check_length(len, 2, "GRFInhibit")) return;
	buf++;
	uint8 num = grf_load_byte(&buf);
	if (!check_length(len, 2 + 4 * num, "GRFInhibit")) return;

	for (uint i = 0; i < num; i++) {
		uint32 grfid = grf_load_dword(&buf);

		/* GRF is unsafe it if tries to deactivate other GRFs */
		if (grfid != _cur_grfconfig->grfid) {
			SETBIT(_cur_grfconfig->flags, GCF_UNSAFE);

			/* Skip remainder of GRF */
			_skip_sprites = -1;

			return;
		}
	}
}

/* Action 0x0E */
static void GRFInhibit(byte *buf, int len)
{
	/* <0E> <num> <grfids...>
	 *
	 * B num           Number of GRFIDs that follow
	 * D grfids        GRFIDs of the files to deactivate */

	if (!check_length(len, 2, "GRFInhibit")) return;
	buf++;
	uint8 num = grf_load_byte(&buf);
	if (!check_length(len, 2 + 4 * num, "GRFInhibit")) return;

	for (uint i = 0; i < num; i++) {
		uint32 grfid = grf_load_dword(&buf);
		GRFConfig *file = GetGRFConfig(grfid);

		/* Unset activation flag */
		if (file != NULL && file != _cur_grfconfig) {
			grfmsg(2, "GRFInhibit: Deactivating file '%s'", file->filename);
			file->status = GCS_DISABLED;
		}
	}
}

/* Action 0x10 */
static void DefineGotoLabel(byte *buf, int len)
{
	/* <10> <label> [<comment>]
	 *
	 * B label      The label to define
	 * V comment    Optional comment - ignored */

	if (!check_length(len, 1, "DefineGotoLabel")) return;
	buf++; len--;

	GRFLabel *label = MallocT<GRFLabel>(1);
	label->label    = grf_load_byte(&buf);
	label->nfo_line = _nfo_line;
	label->pos      = FioGetPos();
	label->next     = NULL;

	/* Set up a linked list of goto targets which we will search in an Action 0x7/0x9 */
	if (_cur_grffile->label == NULL) {
		_cur_grffile->label = label;
	} else {
		/* Attach the label to the end of the list */
		GRFLabel *l;
		for (l = _cur_grffile->label; l->next != NULL; l = l->next);
		l->next = label;
	}

	grfmsg(2, "DefineGotoLabel: GOTO target with label 0x%02X", label->label);
}

/* Action 0x11 */
static void GRFSound(byte *buf, int len)
{
	/* <11> <num>
	 *
	 * W num      Number of sound files that follow */

	if (!check_length(len, 1, "GRFSound")) return;
	buf++;
	uint16 num = grf_load_word(&buf);

	_grf_data_blocks = num;
	_grf_data_type   = GDT_SOUND;

	if (_cur_grffile->sound_offset == 0) _cur_grffile->sound_offset = GetNumSounds();
}

static void ImportGRFSound(byte *buf, int len)
{
	const GRFFile *file;
	FileEntry *se = AllocateFileEntry();
	uint32 grfid = grf_load_dword(&buf);
	uint16 sound = grf_load_word(&buf);

	file = GetFileByGRFID(grfid);
	if (file == NULL || file->sound_offset == 0) {
		grfmsg(1, "ImportGRFSound: Source file not available");
		return;
	}

	if (file->sound_offset + sound >= GetNumSounds()) {
		grfmsg(1, "ImportGRFSound: Sound effect %d is invalid", sound);
		return;
	}

	grfmsg(2, "ImportGRFSound: Copying sound %d (%d) from file %X", sound, file->sound_offset + sound, grfid);

	*se = *GetSound(file->sound_offset + sound);

	/* Reset volume and priority, which TTDPatch doesn't copy */
	se->volume   = 128;
	se->priority = 0;
}

/* 'Action 0xFE' */
static void GRFImportBlock(byte *buf, int len)
{
	if (_grf_data_blocks == 0) {
		grfmsg(2, "GRFImportBlock: Unexpected import block, skipping");
		return;
	}

	buf++;

	_grf_data_blocks--;

	/* XXX 'Action 0xFE' isn't really specified. It is only mentioned for
	 * importing sounds, so this is probably all wrong... */
	if (grf_load_byte(&buf) != _grf_data_type) {
		grfmsg(1, "GRFImportBlock: Import type mismatch");
	}

	switch (_grf_data_type) {
		case GDT_SOUND: ImportGRFSound(buf, len - 1); break;
		default: NOT_REACHED(); break;
	}
}

static void LoadGRFSound(byte *buf, int len)
{
	byte *buf_start = buf;

	/* Allocate a sound entry. This is done even if the data is not loaded
	 * so that the indices used elsewhere are still correct. */
	FileEntry *se = AllocateFileEntry();

	if (grf_load_dword(&buf) != BSWAP32('RIFF')) {
		grfmsg(1, "LoadGRFSound: Missing RIFF header");
		return;
	}

	/* Size of file -- we ignore this */
	grf_load_dword(&buf);

	if (grf_load_dword(&buf) != BSWAP32('WAVE')) {
		grfmsg(1, "LoadGRFSound: Invalid RIFF type");
		return;
	}

	for (;;) {
		uint32 tag  = grf_load_dword(&buf);
		uint32 size = grf_load_dword(&buf);

		switch (tag) {
			case ' tmf': // 'fmt '
				/* Audio format, must be 1 (PCM) */
				if (grf_load_word(&buf) != 1) {
					grfmsg(1, "LoadGRFSound: Invalid audio format");
					return;
				}
				se->channels = grf_load_word(&buf);
				se->rate = grf_load_dword(&buf);
				grf_load_dword(&buf);
				grf_load_word(&buf);
				se->bits_per_sample = grf_load_word(&buf);

				/* Consume any extra bytes */
				for (; size > 16; size--) grf_load_byte(&buf);
				break;

			case 'atad': // 'data'
				se->file_size    = size;
				se->file_offset  = FioGetPos() - (len - (buf - buf_start)) + 1;
				se->file_offset |= _file_index << 24;

				/* Set default volume and priority */
				se->volume = 0x80;
				se->priority = 0;

				grfmsg(2, "LoadGRFSound: channels %u, sample rate %u, bits per sample %u, length %u", se->channels, se->rate, se->bits_per_sample, size);
				return;

			default:
				se->file_size = 0;
				return;
		}
	}
}

/* Action 0x12 */
static void LoadFontGlyph(byte *buf, int len)
{
	/* <12> <num_def> <font_size> <num_char> <base_char>
	 *
	 * B num_def      Number of definitions
	 * B font_size    Size of font (0 = normal, 1 = small, 2 = large)
	 * B num_char     Number of consecutive glyphs
	 * W base_char    First character index */

	buf++; len--;
	if (!check_length(len, 1, "LoadFontGlyph")) return;

	uint8 num_def = grf_load_byte(&buf);

	if (!check_length(len, 1 + num_def * 4, "LoadFontGlyph")) return;

	for (uint i = 0; i < num_def; i++) {
		FontSize size    = (FontSize)grf_load_byte(&buf);
		uint8  num_char  = grf_load_byte(&buf);
		uint16 base_char = grf_load_word(&buf);

		grfmsg(7, "LoadFontGlyph: Loading %u glyph(s) at 0x%04X for size %u", num_char, base_char, size);

		for (uint c = 0; c < num_char; c++) {
			SetUnicodeGlyph(size, base_char + c, _cur_spriteid);
			LoadNextSprite(_cur_spriteid++, _file_index);
			_nfo_line++;
		}
	}
}

/* Action 0x13 */
static void TranslateGRFStrings(byte *buf, int len)
{
	/* <13> <grfid> <num-ent> <offset> <text...>
	 *
	 * 4*B grfid     The GRFID of the file whose texts are to be translated
	 * B   num-ent   Number of strings
	 * W   offset    First text ID
	 * S   text...   Zero-terminated strings */

	buf++; len--;
	if (!check_length(len, 7, "TranslateGRFString")) return;

	uint32 grfid = grf_load_dword(&buf);
	const GRFConfig *c = GetGRFConfig(grfid);
	if (c == NULL || (c->status != GCS_INITIALISED && c->status != GCS_ACTIVATED)) {
		grfmsg(7, "TranslateGRFStrings: GRFID 0x%08x unknown, skipping action 13", BSWAP32(grfid));
		return;
	}

	if (c->status == GCS_INITIALISED) {
		/* If the file is not active but will be activated later, give an error
		 * and disable this file. */
		GRFError *error = CallocT<GRFError>(1);
		error->message  = STR_NEWGRF_ERROR_LOAD_AFTER;
		error->data     = STR_NEWGRF_ERROR_AFTER_TRANSLATED_FILE;
		error->severity = STR_NEWGRF_ERROR_MSG_FATAL;

		if (_cur_grfconfig->error != NULL) free(_cur_grfconfig->error);
		_cur_grfconfig->error = error;

		_cur_grfconfig->status = GCS_DISABLED;
		_skip_sprites = -1;
		return;
	}

	byte num_strings = grf_load_byte(&buf);
	uint16 first_id  = grf_load_word(&buf);

	if (!((first_id >= 0xD000 && first_id + num_strings <= 0xD3FF) || (first_id >= 0xDC00 && first_id + num_strings <= 0xDCFF))) {
		grfmsg(7, "TranslateGRFStrings: Attempting to set out-of-range string IDs in action 13 (first: 0x%4X, number: 0x%2X)", first_id, num_strings);
		return;
	}

	len -= 7;

	for (uint i = 0; i < num_strings && len > 0; i++) {
		const char *string   = grf_load_string(&buf, len);
		size_t string_length = strlen(string) + 1;

		len -= (int)string_length;

		if (string_length == 1) {
			grfmsg(7, "TranslateGRFString: Ignoring empty string.");
			continue;
		}

		/* Since no language id is supplied this string has to be added as a
		 * generic string, thus the language id of 0x7F. For this to work
		 * new_scheme has to be true as well. A language id of 0x7F will be
		 * overridden by a non-generic id, so this will not change anything if
		 * a string has been provided specifically for this language. */
		AddGRFString(grfid, first_id + i, 0x7F, true, string, STR_UNDEFINED);
	}
}

/* 'Action 0xFF' */
static void GRFDataBlock(byte *buf, int len)
{
	if (_grf_data_blocks == 0) {
		grfmsg(2, "GRFDataBlock: unexpected data block, skipping");
		return;
	}

	buf++;
	uint8 name_len = grf_load_byte(&buf);
	const char *name = (const char *)buf;
	buf += name_len + 1;

	grfmsg(2, "GRFDataBlock: block name '%s'...", name);

	_grf_data_blocks--;

	switch (_grf_data_type) {
		case GDT_SOUND: LoadGRFSound(buf, len - name_len - 2); break;
		default: NOT_REACHED(); break;
	}
}


/* Used during safety scan on unsafe actions */
static void GRFUnsafe(byte *buf, int len)
{
	SETBIT(_cur_grfconfig->flags, GCF_UNSAFE);

	/* Skip remainder of GRF */
	_skip_sprites = -1;
}


static void InitializeGRFSpecial()
{
	_ttdpatch_flags[0] =  ((_patches.always_small_airport ? 1 : 0) << 0x0C)  // keepsmallairport
	                   |                                        (1 << 0x0D)  // newairports
	                   |                                        (1 << 0x0E)  // largestations
	                   |           ((_patches.longbridges ? 1 : 0) << 0x0F)  // longbridges
	                   |                                        (0 << 0x10)  // loadtime
	                   |                                        (1 << 0x12)  // presignals
	                   |                                        (1 << 0x13)  // extpresignals
	                   | ((_patches.never_expire_vehicles ? 1 : 0) << 0x16)  // enginespersist
	                   |                                        (1 << 0x1B)  // multihead
	                   |                                        (1 << 0x1D)  // lowmemory
	                   |                                        (1 << 0x1E); // generalfixes

	_ttdpatch_flags[1] =                                        (0 << 0x07)  // moreairports - based on units of noise
	                   |        ((_patches.mammoth_trains ? 1 : 0) << 0x08)  // mammothtrains
	                   |                                        (1 << 0x09)  // trainrefit
	                   |                                        (0 << 0x0B)  // subsidiaries
	                   |       ((_patches.gradual_loading ? 1 : 0) << 0x0C)  // gradualloading
	                   |                                        (1 << 0x12)  // unifiedmaglevmode - set bit 0 mode. Not revelant to OTTD
	                   |                                        (1 << 0x13)  // unifiedmaglevmode - set bit 1 mode
	                   |                                        (1 << 0x14)  // bridgespeedlimits
	                   |                                        (1 << 0x16)  // eternalgame
	                   |                                        (1 << 0x17)  // newtrains
	                   |                                        (1 << 0x18)  // newrvs
	                   |                                        (1 << 0x19)  // newships
	                   |                                        (1 << 0x1A)  // newplanes
	                   |           ((_patches.signal_side ? 1 : 0) << 0x1B)  // signalsontrafficside
	                   |                                        (1 << 0x1C); // electrifiedrailway

	_ttdpatch_flags[2] =                                        (1 << 0x01)  // loadallgraphics - obsolote
	                   |                                        (1 << 0x03)  // semaphores
	                   |                                        (0 << 0x0B)  // enhancedgui
	                   |                                        (0 << 0x0C)  // newagerating
	                   |       ((_patches.build_on_slopes ? 1 : 0) << 0x0D)  // buildonslopes
	                   |         ((_patches.full_load_any ? 1 : 0) << 0x0E)  // fullloadany
	                   |                                        (0 << 0x0F)  // planespeed
	                   |                                        (0 << 0x10)  // moreindustriesperclimate - obsolete
	                   |                                        (0 << 0x11)  // moretoylandfeatures
	                   |                                        (1 << 0x12)  // newstations
	                   |                                        (0 << 0x13)  // tracktypecostdiff
	                   |                                        (1 << 0x14)  // manualconvert
	                   |       ((_patches.build_on_slopes ? 1 : 0) << 0x15)  // buildoncoasts
	                   |                                        (1 << 0x16)  // canals
	                   |                                        (1 << 0x17)  // newstartyear
	                   |    ((_patches.freight_trains > 1 ? 1 : 0) << 0x18)  // freighttrains
	                   |                                        (1 << 0x19)  // newhouses
	                   |                                        (1 << 0x1A)  // newbridges
	                   |                                        (0 << 0x1B)  // newtownnames
	                   |                                        (0 << 0x1C)  // moreanimations
	                   |    ((_patches.wagon_speed_limits ? 1 : 0) << 0x1D)  // wagonspeedlimits
	                   |                                        (1 << 0x1E)  // newshistory
	                   |                                        (0 << 0x1F); // custombridgeheads

	_ttdpatch_flags[3] =                                        (0 << 0x00)  // newcargodistribution
	                   |                                        (1 << 0x01)  // windowsnap
	                   |                                        (0 << 0x02)  // townbuildnoroad
	                   |                                        (0 << 0x03)  // pathbasedsignalling. To enable if ever pbs is back
	                   |                                        (0 << 0x04)  // aichoosechance
	                   |                                        (1 << 0x05)  // resolutionwidth
	                   |                                        (1 << 0x06)  // resolutionheight
	                   |                                        (0 << 0x07)  // newindustries
	                   |         ((_patches.improved_load ? 1 : 0) << 0x08)  // fifoloading
	                   |                                        (0 << 0x09)  // townroadbranchprob
	                   |                                        (0 << 0x0A)  // tempsnowline
	                   |                                        (1 << 0x0B)  // newcargo
	                   |                                        (1 << 0x0C)  // enhancemultiplayer
	                   |                                        (1 << 0x0D)  // onewayroads
	                   |   ((_patches.nonuniform_stations ? 1 : 0) << 0x0E)  // irregularstations
	                   |                                        (1 << 0x0F)  // statistics
	                   |                                        (1 << 0x10)  // newsounds
	                   |                                        (1 << 0x11)  // autoreplace
	                   |                                        (1 << 0x12)  // autoslope
	                   |                                        (0 << 0x13)  // followvehicle
	                   |                                        (1 << 0x14)  // trams
	                   |                                        (0 << 0x15)  // enhancetunnels
	                   |                                        (0 << 0x16)  // shortrvs
	                   |                                        (0 << 0x17)  // articulatedrvs
	                   |                                        (1 << 0x1E); // variablerunningcosts
}

static void ResetCustomStations()
{
	for (GRFFile *file = _first_grffile; file != NULL; file = file->next) {
		if (file->stations == NULL) continue;
		for (uint i = 0; i < MAX_STATIONS; i++) {
			if (file->stations[i] == NULL) continue;
			StationSpec *statspec = file->stations[i];

			/* Release renderdata, if it wasn't copied from another custom station spec  */
			if (!statspec->copied_renderdata) {
				for (uint t = 0; t < statspec->tiles; t++) {
					free((void*)statspec->renderdata[t].seq);
				}
				free(statspec->renderdata);
			}

			/* Release platforms and layouts */
			if (!statspec->copied_layouts) {
				for (uint l = 0; l < statspec->lengths; l++) {
					for (uint p = 0; p < statspec->platforms[l]; p++) {
						free(statspec->layouts[l][p]);
					}
					free(statspec->layouts[l]);
				}
				free(statspec->layouts);
				free(statspec->platforms);
			}

			/* Release this station */
			free(statspec);
		}

		/* Free and reset the station data */
		free(file->stations);
		file->stations = NULL;
	}
}

static void ResetCustomHouses()
{
	GRFFile *file;
	uint i;

	for (file = _first_grffile; file != NULL; file = file->next) {
		if (file->housespec == NULL) continue;
		for (i = 0; i < HOUSE_MAX; i++) free(file->housespec[i]);

		free(file->housespec);
		file->housespec = NULL;
	}
}

static void ResetCustomIndustries()
{
	GRFFile *file;

	for (file = _first_grffile; file != NULL; file = file->next) {
		uint i;
		/* We are verifiying both tiles and industries specs loaded from the grf file
		 * First, let's deal with industryspec */
		if (file->industryspec != NULL) {

			for (i = 0; i < NUM_INDUSTRYTYPES; i++) {
				IndustrySpec *ind = file->industryspec[i];

				if (ind != NULL) {
					/* We need to remove the sounds array */
					if (HASBIT(ind->cleanup_flag, CLEAN_RANDOMSOUNDS)) {
						free((void*)ind->random_sounds);
					}

					/* We need to remove the tiles layouts */
					if (HASBIT(ind->cleanup_flag, CLEAN_TILELSAYOUT) && ind->table != NULL) {
						for (int j = 0; j < ind->num_table; j++) {
							/* remove the individual layouts */
							if (ind->table[j] != NULL) {
								free((IndustryTileTable*)ind->table[j]);
							}
						}
						/* remove the layouts pointers */
						free((IndustryTileTable**)ind->table);
						ind->table = NULL;
					}

					free(ind);
					ind = NULL;
				}
			}

			free(file->industryspec);
			file->industryspec = NULL;
		}

		if (file->indtspec != NULL) {
			for (i = 0; i < NUM_INDUSTRYTILES; i++) {
				if (file->indtspec[i] != NULL) {
					free(file->indtspec[i]);
					file->indtspec[i] = NULL;
				}
			}

			free(file->indtspec);
			file->indtspec = NULL;
		}
	}
}

static void ResetNewGRF()
{
	GRFFile *next;

	for (GRFFile *f = _first_grffile; f != NULL; f = next) {
		next = f->next;

		free(f->filename);
		free(f->cargo_list);
		free(f);
	}

	_first_grffile = NULL;
	_cur_grffile   = NULL;
}

/**
 * Reset all NewGRF loaded data
 * TODO
 */
static void ResetNewGRFData()
{
	CleanUpStrings();

	/* Copy/reset original engine info data */
	memcpy(&_engine_info, &orig_engine_info, sizeof(orig_engine_info));
	memcpy(&_rail_vehicle_info, &orig_rail_vehicle_info, sizeof(orig_rail_vehicle_info));
	memcpy(&_ship_vehicle_info, &orig_ship_vehicle_info, sizeof(orig_ship_vehicle_info));
	memcpy(&_aircraft_vehicle_info, &orig_aircraft_vehicle_info, sizeof(orig_aircraft_vehicle_info));
	memcpy(&_road_vehicle_info, &orig_road_vehicle_info, sizeof(orig_road_vehicle_info));

	/* Copy/reset original bridge info data
	 * First, free sprite table data */
	for (uint i = 0; i < MAX_BRIDGES; i++) {
		if (_bridge[i].sprite_table != NULL) {
			for (uint j = 0; j < 7; j++) free(_bridge[i].sprite_table[j]);
			free(_bridge[i].sprite_table);
		}
	}
	memcpy(&_bridge, &orig_bridge, sizeof(_bridge));

	/* Reset refit/cargo class data */
	memset(&cargo_allowed, 0, sizeof(cargo_allowed));
	memset(&cargo_disallowed, 0, sizeof(cargo_disallowed));

	/* Reset GRM reservations */
	memset(&_grm_engines, 0, sizeof(_grm_engines));

	/* Unload sprite group data */
	UnloadWagonOverrides();
	UnloadRotorOverrideSprites();
	UnloadCustomEngineSprites();
	UnloadCustomEngineNames();
	ResetEngineListOrder();

	/* Reset price base data */
	ResetPriceBaseMultipliers();

	/* Reset the curencies array */
	ResetCurrencies();

	/* Reset the house array */
	ResetCustomHouses();
	ResetHouses();

	/* Reset the industries structures*/
	ResetCustomIndustries();
	ResetIndustries();

	/* Reset station classes */
	ResetStationClasses();
	ResetCustomStations();

	/* Reset canal sprite groups */
	memset(_canal_sg, 0, sizeof(_canal_sg));

	/* Reset the snowline table. */
	ClearSnowLine();

	/* Reset NewGRF files */
	ResetNewGRF();

	/* Add engine type to engine data. This is needed for the refit precalculation. */
	AddTypeToEngines();

	/* Set up the default cargo types */
	SetupCargoForClimate(_opt.landscape);

	/* Reset misc GRF features and train list display variables */
	_misc_grf_features = 0;
	_traininfo_vehicle_pitch = 0;
	_traininfo_vehicle_width = 29;

	_loaded_newgrf_features = 0;

	_signal_base = 0;
	_coast_base = 0;

	InitializeSoundPool();
	InitializeSpriteGroupPool();
}

/** Reset all NewGRFData that was used only while processing data */
static void ClearTemporaryNewGRFData()
{
	/* Clear the GOTO labels used for GRF processing */
	for (GRFLabel *l = _cur_grffile->label; l != NULL;) {
		GRFLabel *l2 = l->next;
		free(l);
		l = l2;
	}
	_cur_grffile->label = NULL;

	/* Clear the list of spritegroups */
	free(_cur_grffile->spritegroups);
	_cur_grffile->spritegroups = NULL;
	_cur_grffile->spritegroups_count = 0;
}

static void BuildCargoTranslationMap()
{
	memset(_cur_grffile->cargo_map, 0xFF, sizeof(_cur_grffile->cargo_map));

	for (CargoID c = 0; c < NUM_CARGO; c++) {
		const CargoSpec *cs = GetCargo(c);
		if (!cs->IsValid()) continue;

		if (_cur_grffile->cargo_max == 0) {
			/* Default translation table, so just a straight mapping to bitnum */
			_cur_grffile->cargo_map[c] = cs->bitnum;
		} else {
			/* Check the translation table for this cargo's label */
			for (uint i = 0; i < _cur_grffile->cargo_max; i++) {
				if (cs->label == _cur_grffile->cargo_list[i]) {
					_cur_grffile->cargo_map[c] = i;
					break;
				}
			}
		}
	}
}

static void InitNewGRFFile(const GRFConfig *config, int sprite_offset)
{
	GRFFile *newfile = GetFileByFilename(config->filename);
	if (newfile != NULL) {
		/* We already loaded it once. */
		newfile->sprite_offset = sprite_offset;
		_cur_grffile = newfile;
		return;
	}

	newfile = CallocT<GRFFile>(1);

	if (newfile == NULL) error ("Out of memory");

	newfile->filename = strdup(config->full_path);
	newfile->sprite_offset = sprite_offset;

	/* Copy the initial parameter list */
	assert(lengthof(newfile->param) == lengthof(config->param) && lengthof(config->param) == 0x80);
	newfile->param_end = config->num_params;
	memcpy(newfile->param, config->param, sizeof(newfile->param));

	if (_first_grffile == NULL) {
		_cur_grffile = newfile;
		_first_grffile = newfile;
	} else {
		_cur_grffile->next = newfile;
		_cur_grffile = newfile;
	}
}


/** List of what cargo labels are refittable for the given the vehicle-type.
 * Only currently active labels are applied. */
static const CargoLabel _default_refitmasks_rail[] = {
	'PASS', 'COAL', 'MAIL', 'LVST', 'GOOD', 'GRAI', 'WHEA', 'MAIZ', 'WOOD',
	'IORE', 'STEL', 'VALU', 'GOLD', 'DIAM', 'PAPR', 'FOOD', 'FRUT', 'CORE',
	'WATR', 'SUGR', 'TOYS', 'BATT', 'SWET', 'TOFF', 'COLA', 'CTCD', 'BUBL',
	'PLST', 'FZDR',
	0 };

static const CargoLabel _default_refitmasks_road[] = {
	0 };

static const CargoLabel _default_refitmasks_ships[] = {
	'COAL', 'MAIL', 'LVST', 'GOOD', 'GRAI', 'WHEA', 'MAIZ', 'WOOD', 'IORE',
	'STEL', 'VALU', 'GOLD', 'DIAM', 'PAPR', 'FOOD', 'FRUT', 'CORE', 'WATR',
	'RUBR', 'SUGR', 'TOYS', 'BATT', 'SWET', 'TOFF', 'COLA', 'CTCD', 'BUBL',
	'PLST', 'FZDR',
	0 };

static const CargoLabel _default_refitmasks_aircraft[] = {
	'PASS', 'MAIL', 'GOOD', 'VALU', 'GOLD', 'DIAM', 'FOOD', 'FRUT', 'SUGR',
	'TOYS', 'BATT', 'SWET', 'TOFF', 'COLA', 'CTCD', 'BUBL', 'PLST', 'FZDR',
	0 };

static const CargoLabel *_default_refitmasks[] = {
	_default_refitmasks_rail,
	_default_refitmasks_road,
	_default_refitmasks_ships,
	_default_refitmasks_aircraft,
};


/**
 * Precalculate refit masks from cargo classes for all vehicles.
 */
static void CalculateRefitMasks()
{
	for (EngineID engine = 0; engine < TOTAL_NUM_ENGINES; engine++) {
		uint32 mask = 0;
		uint32 not_mask = 0;
		uint32 xor_mask = 0;

		if (_engine_info[engine].refit_mask != 0) {
			const GRFFile *file = GetEngineGRF(engine);
			if (file != NULL && file->cargo_max != 0) {
				/* Apply cargo translation table to the refit mask */
				uint num_cargo = min(32, file->cargo_max);
				for (uint i = 0; i < num_cargo; i++) {
					if (!HASBIT(_engine_info[engine].refit_mask, i)) continue;

					CargoID c = GetCargoIDByLabel(file->cargo_list[i]);
					if (c == CT_INVALID) continue;

					SETBIT(xor_mask, c);
				}
			} else {
				/* No cargo table, so use the cargo bitnum values */
				for (CargoID c = 0; c < NUM_CARGO; c++) {
					const CargoSpec *cs = GetCargo(c);
					if (!cs->IsValid()) continue;

					if (HASBIT(_engine_info[engine].refit_mask, cs->bitnum)) SETBIT(xor_mask, c);
				}
			}
		}

		if (cargo_allowed[engine] != 0) {
			/* Build up the list of cargo types from the set cargo classes. */
			for (CargoID i = 0; i < NUM_CARGO; i++) {
				const CargoSpec *cs = GetCargo(i);
				if (cargo_allowed[engine]    & cs->classes) SETBIT(mask,     i);
				if (cargo_disallowed[engine] & cs->classes) SETBIT(not_mask, i);
			}
		} else {
			/* Don't apply default refit mask to wagons or engines with no capacity */
			if (xor_mask == 0 && (
						GetEngine(engine)->type != VEH_TRAIN || (
							RailVehInfo(engine)->capacity != 0 &&
							RailVehInfo(engine)->railveh_type != RAILVEH_WAGON
						)
					)) {
				const CargoLabel *cl = _default_refitmasks[GetEngine(engine)->type];
				for (uint i = 0;; i++) {
					if (cl[i] == 0) break;

					CargoID cargo = GetCargoIDByLabel(cl[i]);
					if (cargo == CT_INVALID) continue;

					SETBIT(xor_mask, cargo);
				}
			}
		}
		_engine_info[engine].refit_mask = ((mask & ~not_mask) ^ xor_mask) & _cargo_mask;

		/* Check if this engine's cargo type is valid. If not, set to the first refittable
		 * cargo type. Apparently cargo_type isn't a common property... */
		switch (GetEngine(engine)->type) {
			default: NOT_REACHED();
			case VEH_AIRCRAFT: break;
			case VEH_TRAIN: {
				RailVehicleInfo *rvi = &_rail_vehicle_info[engine];
				if (rvi->cargo_type == CT_INVALID) rvi->cargo_type = FindFirstRefittableCargo(engine);
				if (rvi->cargo_type == CT_INVALID) _engine_info[engine].climates = 0;
				break;
			}
			case VEH_ROAD: {
				RoadVehicleInfo *rvi = &_road_vehicle_info[engine - ROAD_ENGINES_INDEX];
				if (rvi->cargo_type == CT_INVALID) rvi->cargo_type = FindFirstRefittableCargo(engine);
				if (rvi->cargo_type == CT_INVALID) _engine_info[engine].climates = 0;
				break;
			}
			case VEH_SHIP: {
				ShipVehicleInfo *svi = &_ship_vehicle_info[engine - SHIP_ENGINES_INDEX];
				if (svi->cargo_type == CT_INVALID) svi->cargo_type = FindFirstRefittableCargo(engine);
				if (svi->cargo_type == CT_INVALID) _engine_info[engine].climates = 0;
				break;
			}
		}
	}
}

/** Add all new houses to the house array. House properties can be set at any
 * time in the GRF file, so we can only add a house spec to the house array
 * after the file has finished loading. We also need to check the dates, due to
 * the TTDPatch behaviour described below that we need to emulate. */
static void FinaliseHouseArray()
{
	/* If there are no houses with start dates before 1930, then all houses
	 * with start dates of 1930 have them reset to 0. This is in order to be
	 * compatible with TTDPatch, where if no houses have start dates before
	 * 1930 and the date is before 1930, the game pretends that this is 1930.
	 * If there have been any houses defined with start dates before 1930 then
	 * the dates are left alone. */
	bool reset_dates = true;

	for (GRFFile *file = _first_grffile; file != NULL; file = file->next) {
		if (file->housespec == NULL) continue;

		for (int i = 0; i < HOUSE_MAX; i++) {
			HouseSpec *hs = file->housespec[i];
			if (hs != NULL) {
				_house_mngr.SetEntitySpec(hs);
				if (hs->min_date < 1930) reset_dates = false;
			}
		}
	}

	if (reset_dates) {
		for (int i = NEW_HOUSE_OFFSET; i < HOUSE_MAX; i++) {
			HouseSpec *hs = GetHouseSpecs(i);

			if (hs->enabled && hs->min_date == 1930) hs->min_date = 0;
		}
	}
}


/** Each cargo string needs to be mapped from TTDPatch to OpenTTD string IDs.
 * This is done after loading so that strings from Action 4 will be mapped
 * properly. */
static void MapNewCargoStrings()
{
	for (CargoID c = 0; c < NUM_CARGO; c++) {
		CargoSpec *cs = &_cargo[c];
		/* Don't map if the cargo is unavailable or not from NewGRF */
		if (!cs->IsValid() || cs->grfid == 0) continue;

		cs->name         = MapGRFStringID(cs->grfid, cs->name);
		cs->name_plural  = MapGRFStringID(cs->grfid, cs->name_plural);
		cs->units_volume = MapGRFStringID(cs->grfid, cs->units_volume);
		cs->quantifier   = MapGRFStringID(cs->grfid, cs->quantifier);
		cs->abbrev       = MapGRFStringID(cs->grfid, cs->abbrev);
	}
}


/* Here we perform initial decoding of some special sprites (as are they
 * described at http://www.ttdpatch.net/src/newgrf.txt, but this is only a very
 * partial implementation yet). */
/* XXX: We consider GRF files trusted. It would be trivial to exploit OTTD by
 * a crafted invalid GRF file. We should tell that to the user somehow, or
 * better make this more robust in the future. */
static void DecodeSpecialSprite(uint num, GrfLoadingStage stage)
{
	/* XXX: There is a difference between staged loading in TTDPatch and
	 * here.  In TTDPatch, for some reason actions 1 and 2 are carried out
	 * during stage 1, whilst action 3 is carried out during stage 2 (to
	 * "resolve" cargo IDs... wtf). This is a little problem, because cargo
	 * IDs are valid only within a given set (action 1) block, and may be
	 * overwritten after action 3 associates them. But overwriting happens
	 * in an earlier stage than associating, so...  We just process actions
	 * 1 and 2 in stage 2 now, let's hope that won't get us into problems.
	 * --pasky */
	/* We need a pre-stage to set up GOTO labels of Action 0x10 because the grf
	 * is not in memory and scanning the file every time would be too expensive.
	 * In other stages we skip action 0x10 since it's already dealt with. */
	static const SpecialSpriteHandler handlers[][GLS_END] = {
		/* 0x00 */ { NULL,     SafeChangeInfo, NULL,       InitChangeInfo, ReserveChangeInfo, FeatureChangeInfo, },
		/* 0x01 */ { SkipAct1, SkipAct1,  SkipAct1,        SkipAct1,       SkipAct1,          NewSpriteSet, },
		/* 0x02 */ { NULL,     NULL,      NULL,            NULL,           NULL,              NewSpriteGroup, },
		/* 0x03 */ { NULL,     GRFUnsafe, NULL,            NULL,           NULL,              FeatureMapSpriteGroup, },
		/* 0x04 */ { NULL,     NULL,      NULL,            NULL,           NULL,              FeatureNewName, },
		/* 0x05 */ { SkipAct5, SkipAct5,  SkipAct5,        SkipAct5,       SkipAct5,          GraphicsNew, },
		/* 0x06 */ { NULL,     NULL,      NULL,            CfgApply,       CfgApply,          CfgApply, },
		/* 0x07 */ { NULL,     NULL,      NULL,            NULL,           SkipIf,            SkipIf, },
		/* 0x08 */ { ScanInfo, NULL,      NULL,            GRFInfo,        NULL,              GRFInfo, },
		/* 0x09 */ { NULL,     NULL,      NULL,            SkipIf,         SkipIf,            SkipIf, },
		/* 0x0A */ { SkipActA, SkipActA,  SkipActA,        SkipActA,       SkipActA,          SpriteReplace, },
		/* 0x0B */ { NULL,     NULL,      NULL,            GRFLoadError,   GRFLoadError,      GRFLoadError, },
		/* 0x0C */ { NULL,     NULL,      NULL,            GRFComment,     NULL,              GRFComment, },
		/* 0x0D */ { NULL,     SafeParamSet, NULL,         ParamSet,       ParamSet,          ParamSet, },
		/* 0x0E */ { NULL,     SafeGRFInhibit, NULL,       GRFInhibit,     GRFInhibit,        GRFInhibit, },
		/* 0x0F */ { NULL,     NULL,      NULL,            NULL,           NULL,              NULL, },
		/* 0x10 */ { NULL,     NULL,      DefineGotoLabel, NULL,           NULL,              NULL, },
		/* 0x11 */ { NULL,     GRFUnsafe, NULL,            NULL,           NULL,              GRFSound, },
		/* 0x12 */ { NULL,     NULL,      NULL,            NULL,           NULL,              LoadFontGlyph, },
		/* 0x13 */ { NULL,     NULL,      NULL,            NULL,           NULL,              TranslateGRFStrings, },
	};

	byte* buf;

	if (_preload_sprite == NULL) {
		/* No preloaded sprite to work with; allocate and read the
		 * pseudo sprite content. */
		buf = MallocT<byte>(num);
		if (buf == NULL) error("DecodeSpecialSprite: Could not allocate memory");
		FioReadBlock(buf, num);
	} else {
		/* Use the preloaded sprite data. */
		buf = _preload_sprite;
		_preload_sprite = NULL;
		grfmsg(7, "DecodeSpecialSprite: Using preloaded pseudo sprite data");

		/* Skip the real (original) content of this action. */
		FioSeekTo(num, SEEK_CUR);
	}

	byte action = buf[0];

	if (action == 0xFF) {
		grfmsg(7, "DecodeSpecialSprite: Handling data block in stage %d", stage);
		GRFDataBlock(buf, num);
	} else if (action == 0xFE) {
		grfmsg(7, "DecodeSpecialSprite: andling import block in stage %d", stage);
		GRFImportBlock(buf, num);
	} else if (action >= lengthof(handlers)) {
		grfmsg(7, "DecodeSpecialSprite: Skipping unknown action 0x%02X", action);
	} else if (handlers[action][stage] == NULL) {
		grfmsg(7, "DecodeSpecialSprite: Skipping action 0x%02X in stage %d", action, stage);
	} else {
		grfmsg(7, "DecodeSpecialSprite: Handling action 0x%02X in stage %d", action, stage);
		handlers[action][stage](buf, num);
	}
	free(buf);
}


void LoadNewGRFFile(GRFConfig *config, uint file_index, GrfLoadingStage stage)
{
	const char *filename = config->full_path;
	uint16 num;

	/* A .grf file is activated only if it was active when the game was
	 * started.  If a game is loaded, only its active .grfs will be
	 * reactivated, unless "loadallgraphics on" is used.  A .grf file is
	 * considered active if its action 8 has been processed, i.e. its
	 * action 8 hasn't been skipped using an action 7.
	 *
	 * During activation, only actions 0, 1, 2, 3, 4, 5, 7, 8, 9, 0A and 0B are
	 * carried out.  All others are ignored, because they only need to be
	 * processed once at initialization.  */
	if (stage != GLS_FILESCAN && stage != GLS_SAFETYSCAN && stage != GLS_LABELSCAN) {
		_cur_grffile = GetFileByFilename(filename);
		if (_cur_grffile == NULL) error("File '%s' lost in cache.\n", filename);
		if (stage == GLS_ACTIVATION && config->status != GCS_INITIALISED) return;
	}

	FioOpenFile(file_index, filename);
	_file_index = file_index; // XXX

	_cur_grfconfig = config;

	DEBUG(grf, 2, "LoadNewGRFFile: Reading NewGRF-file '%s'", filename);

	/* Skip the first sprite; we don't care about how many sprites this
	 * does contain; newest TTDPatches and George's longvehicles don't
	 * neither, apparently. */
	if (FioReadWord() == 4 && FioReadByte() == 0xFF) {
		FioReadDword();
	} else {
		DEBUG(grf, 7, "LoadNewGRFFile: Custom .grf has invalid format");
		return;
	}

	_skip_sprites = 0; // XXX
	_nfo_line = 0;

	while ((num = FioReadWord()) != 0) {
		byte type = FioReadByte();
		_nfo_line++;

		if (type == 0xFF) {
			if (_skip_sprites == 0) {
				DecodeSpecialSprite(num, stage);

				/* Stop all processing if we are to skip the remaining sprites */
				if (_skip_sprites == -1) break;

				continue;
			} else {
				FioSkipBytes(num);
			}
		} else {
			if (_skip_sprites == 0) grfmsg(7, "LoadNewGRFFile: Skipping unexpected sprite");

			FioSkipBytes(7);
			num -= 8;

			if (type & 2) {
				FioSkipBytes(num);
			} else {
				while (num > 0) {
					int8 i = FioReadByte();
					if (i >= 0) {
						num -= i;
						FioSkipBytes(i);
					} else {
						i = -(i >> 3);
						num -= i;
						FioReadByte();
					}
				}
			}
		}

		if (_skip_sprites > 0) _skip_sprites--;
	}
}

void InitDepotWindowBlockSizes();

static void AfterLoadGRFs()
{
	/* Update the bitmasks for the vehicle lists */
	Player *p;
	FOR_ALL_PLAYERS(p) {
		p->avail_railtypes = GetPlayerRailtypes(p->index);
		p->avail_roadtypes = GetPlayerRoadtypes(p->index);
	}

	/* Pre-calculate all refit masks after loading GRF files. */
	CalculateRefitMasks();

	/* Set the block size in the depot windows based on vehicle sprite sizes */
	InitDepotWindowBlockSizes();

	/* Add all new houses to the house array. */
	FinaliseHouseArray();

	/* Create dynamic list of industry legends for smallmap_gui.cpp */
	BuildIndustriesLegend();

	/* Map cargo strings. This is a separate step because cargos are
	 * loaded before strings... */
	MapNewCargoStrings();
}

void LoadNewGRF(uint load_index, uint file_index)
{
	InitializeGRFSpecial();

	ResetNewGRFData();

	/* Load newgrf sprites
	 * in each loading stage, (try to) open each file specified in the config
	 * and load information from it. */
	for (GrfLoadingStage stage = GLS_LABELSCAN; stage <= GLS_ACTIVATION; stage++) {
		uint slot = file_index;

		_cur_stage = stage;
		_cur_spriteid = load_index;
		for (GRFConfig *c = _grfconfig; c != NULL; c = c->next) {
			if (c->status == GCS_DISABLED || c->status == GCS_NOT_FOUND) continue;

			/* @todo usererror() */
			if (!FileExists(c->full_path)) error("NewGRF file is missing '%s'", c->filename);

			if (stage == GLS_LABELSCAN) InitNewGRFFile(c, _cur_spriteid);
			LoadNewGRFFile(c, slot++, stage);
			if (stage == GLS_ACTIVATION) {
				ClearTemporaryNewGRFData();
				BuildCargoTranslationMap();
				DEBUG(sprite, 2, "LoadNewGRF: Currently %i sprites are loaded", _cur_spriteid);
			}
		}
	}

	/* Call any functions that should be run after GRFs have been loaded. */
	AfterLoadGRFs();
}

bool HasGrfMiscBit(GrfMiscBit bit)
{
	return HASBIT(_misc_grf_features, bit);
}