summaryrefslogtreecommitdiff
path: root/src/xfaces.c
blob: abfa70b15a01ba21289c99d616b4ada25556493c (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707
1708
1709
1710
1711
1712
1713
1714
1715
1716
1717
1718
1719
1720
1721
1722
1723
1724
1725
1726
1727
1728
1729
1730
1731
1732
1733
1734
1735
1736
1737
1738
1739
1740
1741
1742
1743
1744
1745
1746
1747
1748
1749
1750
1751
1752
1753
1754
1755
1756
1757
1758
1759
1760
1761
1762
1763
1764
1765
1766
1767
1768
1769
1770
1771
1772
1773
1774
1775
1776
1777
1778
1779
1780
1781
1782
1783
1784
1785
1786
1787
1788
1789
1790
1791
1792
1793
1794
1795
1796
1797
1798
1799
1800
1801
1802
1803
1804
1805
1806
1807
1808
1809
1810
1811
1812
1813
1814
1815
1816
1817
1818
1819
1820
1821
1822
1823
1824
1825
1826
1827
1828
1829
1830
1831
1832
1833
1834
1835
1836
1837
1838
1839
1840
1841
1842
1843
1844
1845
1846
1847
1848
1849
1850
1851
1852
1853
1854
1855
1856
1857
1858
1859
1860
1861
1862
1863
1864
1865
1866
1867
1868
1869
1870
1871
1872
1873
1874
1875
1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027
2028
2029
2030
2031
2032
2033
2034
2035
2036
2037
2038
2039
2040
2041
2042
2043
2044
2045
2046
2047
2048
2049
2050
2051
2052
2053
2054
2055
2056
2057
2058
2059
2060
2061
2062
2063
2064
2065
2066
2067
2068
2069
2070
2071
2072
2073
2074
2075
2076
2077
2078
2079
2080
2081
2082
2083
2084
2085
2086
2087
2088
2089
2090
2091
2092
2093
2094
2095
2096
2097
2098
2099
2100
2101
2102
2103
2104
2105
2106
2107
2108
2109
2110
2111
2112
2113
2114
2115
2116
2117
2118
2119
2120
2121
2122
2123
2124
2125
2126
2127
2128
2129
2130
2131
2132
2133
2134
2135
2136
2137
2138
2139
2140
2141
2142
2143
2144
2145
2146
2147
2148
2149
2150
2151
2152
2153
2154
2155
2156
2157
2158
2159
2160
2161
2162
2163
2164
2165
2166
2167
2168
2169
2170
2171
2172
2173
2174
2175
2176
2177
2178
2179
2180
2181
2182
2183
2184
2185
2186
2187
2188
2189
2190
2191
2192
2193
2194
2195
2196
2197
2198
2199
2200
2201
2202
2203
2204
2205
2206
2207
2208
2209
2210
2211
2212
2213
2214
2215
2216
2217
2218
2219
2220
2221
2222
2223
2224
2225
2226
2227
2228
2229
2230
2231
2232
2233
2234
2235
2236
2237
2238
2239
2240
2241
2242
2243
2244
2245
2246
2247
2248
2249
2250
2251
2252
2253
2254
2255
2256
2257
2258
2259
2260
2261
2262
2263
2264
2265
2266
2267
2268
2269
2270
2271
2272
2273
2274
2275
2276
2277
2278
2279
2280
2281
2282
2283
2284
2285
2286
2287
2288
2289
2290
2291
2292
2293
2294
2295
2296
2297
2298
2299
2300
2301
2302
2303
2304
2305
2306
2307
2308
2309
2310
2311
2312
2313
2314
2315
2316
2317
2318
2319
2320
2321
2322
2323
2324
2325
2326
2327
2328
2329
2330
2331
2332
2333
2334
2335
2336
2337
2338
2339
2340
2341
2342
2343
2344
2345
2346
2347
2348
2349
2350
2351
2352
2353
2354
2355
2356
2357
2358
2359
2360
2361
2362
2363
2364
2365
2366
2367
2368
2369
2370
2371
2372
2373
2374
2375
2376
2377
2378
2379
2380
2381
2382
2383
2384
2385
2386
2387
2388
2389
2390
2391
2392
2393
2394
2395
2396
2397
2398
2399
2400
2401
2402
2403
2404
2405
2406
2407
2408
2409
2410
2411
2412
2413
2414
2415
2416
2417
2418
2419
2420
2421
2422
2423
2424
2425
2426
2427
2428
2429
2430
2431
2432
2433
2434
2435
2436
2437
2438
2439
2440
2441
2442
2443
2444
2445
2446
2447
2448
2449
2450
2451
2452
2453
2454
2455
2456
2457
2458
2459
2460
2461
2462
2463
2464
2465
2466
2467
2468
2469
2470
2471
2472
2473
2474
2475
2476
2477
2478
2479
2480
2481
2482
2483
2484
2485
2486
2487
2488
2489
2490
2491
2492
2493
2494
2495
2496
2497
2498
2499
2500
2501
2502
2503
2504
2505
2506
2507
2508
2509
2510
2511
2512
2513
2514
2515
2516
2517
2518
2519
2520
2521
2522
2523
2524
2525
2526
2527
2528
2529
2530
2531
2532
2533
2534
2535
2536
2537
2538
2539
2540
2541
2542
2543
2544
2545
2546
2547
2548
2549
2550
2551
2552
2553
2554
2555
2556
2557
2558
2559
2560
2561
2562
2563
2564
2565
2566
2567
2568
2569
2570
2571
2572
2573
2574
2575
2576
2577
2578
2579
2580
2581
2582
2583
2584
2585
2586
2587
2588
2589
2590
2591
2592
2593
2594
2595
2596
2597
2598
2599
2600
2601
2602
2603
2604
2605
2606
2607
2608
2609
2610
2611
2612
2613
2614
2615
2616
2617
2618
2619
2620
2621
2622
2623
2624
2625
2626
2627
2628
2629
2630
2631
2632
2633
2634
2635
2636
2637
2638
2639
2640
2641
2642
2643
2644
2645
2646
2647
2648
2649
2650
2651
2652
2653
2654
2655
2656
2657
2658
2659
2660
2661
2662
2663
2664
2665
2666
2667
2668
2669
2670
2671
2672
2673
2674
2675
2676
2677
2678
2679
2680
2681
2682
2683
2684
2685
2686
2687
2688
2689
2690
2691
2692
2693
2694
2695
2696
2697
2698
2699
2700
2701
2702
2703
2704
2705
2706
2707
2708
2709
2710
2711
2712
2713
2714
2715
2716
2717
2718
2719
2720
2721
2722
2723
2724
2725
2726
2727
2728
2729
2730
2731
2732
2733
2734
2735
2736
2737
2738
2739
2740
2741
2742
2743
2744
2745
2746
2747
2748
2749
2750
2751
2752
2753
2754
2755
2756
2757
2758
2759
2760
2761
2762
2763
2764
2765
2766
2767
2768
2769
2770
2771
2772
2773
2774
2775
2776
2777
2778
2779
2780
2781
2782
2783
2784
2785
2786
2787
2788
2789
2790
2791
2792
2793
2794
2795
2796
2797
2798
2799
2800
2801
2802
2803
2804
2805
2806
2807
2808
2809
2810
2811
2812
2813
2814
2815
2816
2817
2818
2819
2820
2821
2822
2823
2824
2825
2826
2827
2828
2829
2830
2831
2832
2833
2834
2835
2836
2837
2838
2839
2840
2841
2842
2843
2844
2845
2846
2847
2848
2849
2850
2851
2852
2853
2854
2855
2856
2857
2858
2859
2860
2861
2862
2863
2864
2865
2866
2867
2868
2869
2870
2871
2872
2873
2874
2875
2876
2877
2878
2879
2880
2881
2882
2883
2884
2885
2886
2887
2888
2889
2890
2891
2892
2893
2894
2895
2896
2897
2898
2899
2900
2901
2902
2903
2904
2905
2906
2907
2908
2909
2910
2911
2912
2913
2914
2915
2916
2917
2918
2919
2920
2921
2922
2923
2924
2925
2926
2927
2928
2929
2930
2931
2932
2933
2934
2935
2936
2937
2938
2939
2940
2941
2942
2943
2944
2945
2946
2947
2948
2949
2950
2951
2952
2953
2954
2955
2956
2957
2958
2959
2960
2961
2962
2963
2964
2965
2966
2967
2968
2969
2970
2971
2972
2973
2974
2975
2976
2977
2978
2979
2980
2981
2982
2983
2984
2985
2986
2987
2988
2989
2990
2991
2992
2993
2994
2995
2996
2997
2998
2999
3000
3001
3002
3003
3004
3005
3006
3007
3008
3009
3010
3011
3012
3013
3014
3015
3016
3017
3018
3019
3020
3021
3022
3023
3024
3025
3026
3027
3028
3029
3030
3031
3032
3033
3034
3035
3036
3037
3038
3039
3040
3041
3042
3043
3044
3045
3046
3047
3048
3049
3050
3051
3052
3053
3054
3055
3056
3057
3058
3059
3060
3061
3062
3063
3064
3065
3066
3067
3068
3069
3070
3071
3072
3073
3074
3075
3076
3077
3078
3079
3080
3081
3082
3083
3084
3085
3086
3087
3088
3089
3090
3091
3092
3093
3094
3095
3096
3097
3098
3099
3100
3101
3102
3103
3104
3105
3106
3107
3108
3109
3110
3111
3112
3113
3114
3115
3116
3117
3118
3119
3120
3121
3122
3123
3124
3125
3126
3127
3128
3129
3130
3131
3132
3133
3134
3135
3136
3137
3138
3139
3140
3141
3142
3143
3144
3145
3146
3147
3148
3149
3150
3151
3152
3153
3154
3155
3156
3157
3158
3159
3160
3161
3162
3163
3164
3165
3166
3167
3168
3169
3170
3171
3172
3173
3174
3175
3176
3177
3178
3179
3180
3181
3182
3183
3184
3185
3186
3187
3188
3189
3190
3191
3192
3193
3194
3195
3196
3197
3198
3199
3200
3201
3202
3203
3204
3205
3206
3207
3208
3209
3210
3211
3212
3213
3214
3215
3216
3217
3218
3219
3220
3221
3222
3223
3224
3225
3226
3227
3228
3229
3230
3231
3232
3233
3234
3235
3236
3237
3238
3239
3240
3241
3242
3243
3244
3245
3246
3247
3248
3249
3250
3251
3252
3253
3254
3255
3256
3257
3258
3259
3260
3261
3262
3263
3264
3265
3266
3267
3268
3269
3270
3271
3272
3273
3274
3275
3276
3277
3278
3279
3280
3281
3282
3283
3284
3285
3286
3287
3288
3289
3290
3291
3292
3293
3294
3295
3296
3297
3298
3299
3300
3301
3302
3303
3304
3305
3306
3307
3308
3309
3310
3311
3312
3313
3314
3315
3316
3317
3318
3319
3320
3321
3322
3323
3324
3325
3326
3327
3328
3329
3330
3331
3332
3333
3334
3335
3336
3337
3338
3339
3340
3341
3342
3343
3344
3345
3346
3347
3348
3349
3350
3351
3352
3353
3354
3355
3356
3357
3358
3359
3360
3361
3362
3363
3364
3365
3366
3367
3368
3369
3370
3371
3372
3373
3374
3375
3376
3377
3378
3379
3380
3381
3382
3383
3384
3385
3386
3387
3388
3389
3390
3391
3392
3393
3394
3395
3396
3397
3398
3399
3400
3401
3402
3403
3404
3405
3406
3407
3408
3409
3410
3411
3412
3413
3414
3415
3416
3417
3418
3419
3420
3421
3422
3423
3424
3425
3426
3427
3428
3429
3430
3431
3432
3433
3434
3435
3436
3437
3438
3439
3440
3441
3442
3443
3444
3445
3446
3447
3448
3449
3450
3451
3452
3453
3454
3455
3456
3457
3458
3459
3460
3461
3462
3463
3464
3465
3466
3467
3468
3469
3470
3471
3472
3473
3474
3475
3476
3477
3478
3479
3480
3481
3482
3483
3484
3485
3486
3487
3488
3489
3490
3491
3492
3493
3494
3495
3496
3497
3498
3499
3500
3501
3502
3503
3504
3505
3506
3507
3508
3509
3510
3511
3512
3513
3514
3515
3516
3517
3518
3519
3520
3521
3522
3523
3524
3525
3526
3527
3528
3529
3530
3531
3532
3533
3534
3535
3536
3537
3538
3539
3540
3541
3542
3543
3544
3545
3546
3547
3548
3549
3550
3551
3552
3553
3554
3555
3556
3557
3558
3559
3560
3561
3562
3563
3564
3565
3566
3567
3568
3569
3570
3571
3572
3573
3574
3575
3576
3577
3578
3579
3580
3581
3582
3583
3584
3585
3586
3587
3588
3589
3590
3591
3592
3593
3594
3595
3596
3597
3598
3599
3600
3601
3602
3603
3604
3605
3606
3607
3608
3609
3610
3611
3612
3613
3614
3615
3616
3617
3618
3619
3620
3621
3622
3623
3624
3625
3626
3627
3628
3629
3630
3631
3632
3633
3634
3635
3636
3637
3638
3639
3640
3641
3642
3643
3644
3645
3646
3647
3648
3649
3650
3651
3652
3653
3654
3655
3656
3657
3658
3659
3660
3661
3662
3663
3664
3665
3666
3667
3668
3669
3670
3671
3672
3673
3674
3675
3676
3677
3678
3679
3680
3681
3682
3683
3684
3685
3686
3687
3688
3689
3690
3691
3692
3693
3694
3695
3696
3697
3698
3699
3700
3701
3702
3703
3704
3705
3706
3707
3708
3709
3710
3711
3712
3713
3714
3715
3716
3717
3718
3719
3720
3721
3722
3723
3724
3725
3726
3727
3728
3729
3730
3731
3732
3733
3734
3735
3736
3737
3738
3739
3740
3741
3742
3743
3744
3745
3746
3747
3748
3749
3750
3751
3752
3753
3754
3755
3756
3757
3758
3759
3760
3761
3762
3763
3764
3765
3766
3767
3768
3769
3770
3771
3772
3773
3774
3775
3776
3777
3778
3779
3780
3781
3782
3783
3784
3785
3786
3787
3788
3789
3790
3791
3792
3793
3794
3795
3796
3797
3798
3799
3800
3801
3802
3803
3804
3805
3806
3807
3808
3809
3810
3811
3812
3813
3814
3815
3816
3817
3818
3819
3820
3821
3822
3823
3824
3825
3826
3827
3828
3829
3830
3831
3832
3833
3834
3835
3836
3837
3838
3839
3840
3841
3842
3843
3844
3845
3846
3847
3848
3849
3850
3851
3852
3853
3854
3855
3856
3857
3858
3859
3860
3861
3862
3863
3864
3865
3866
3867
3868
3869
3870
3871
3872
3873
3874
3875
3876
3877
3878
3879
3880
3881
3882
3883
3884
3885
3886
3887
3888
3889
3890
3891
3892
3893
3894
3895
3896
3897
3898
3899
3900
3901
3902
3903
3904
3905
3906
3907
3908
3909
3910
3911
3912
3913
3914
3915
3916
3917
3918
3919
3920
3921
3922
3923
3924
3925
3926
3927
3928
3929
3930
3931
3932
3933
3934
3935
3936
3937
3938
3939
3940
3941
3942
3943
3944
3945
3946
3947
3948
3949
3950
3951
3952
3953
3954
3955
3956
3957
3958
3959
3960
3961
3962
3963
3964
3965
3966
3967
3968
3969
3970
3971
3972
3973
3974
3975
3976
3977
3978
3979
3980
3981
3982
3983
3984
3985
3986
3987
3988
3989
3990
3991
3992
3993
3994
3995
3996
3997
3998
3999
4000
4001
4002
4003
4004
4005
4006
4007
4008
4009
4010
4011
4012
4013
4014
4015
4016
4017
4018
4019
4020
4021
4022
4023
4024
4025
4026
4027
4028
4029
4030
4031
4032
4033
4034
4035
4036
4037
4038
4039
4040
4041
4042
4043
4044
4045
4046
4047
4048
4049
4050
4051
4052
4053
4054
4055
4056
4057
4058
4059
4060
4061
4062
4063
4064
4065
4066
4067
4068
4069
4070
4071
4072
4073
4074
4075
4076
4077
4078
4079
4080
4081
4082
4083
4084
4085
4086
4087
4088
4089
4090
4091
4092
4093
4094
4095
4096
4097
4098
4099
4100
4101
4102
4103
4104
4105
4106
4107
4108
4109
4110
4111
4112
4113
4114
4115
4116
4117
4118
4119
4120
4121
4122
4123
4124
4125
4126
4127
4128
4129
4130
4131
4132
4133
4134
4135
4136
4137
4138
4139
4140
4141
4142
4143
4144
4145
4146
4147
4148
4149
4150
4151
4152
4153
4154
4155
4156
4157
4158
4159
4160
4161
4162
4163
4164
4165
4166
4167
4168
4169
4170
4171
4172
4173
4174
4175
4176
4177
4178
4179
4180
4181
4182
4183
4184
4185
4186
4187
4188
4189
4190
4191
4192
4193
4194
4195
4196
4197
4198
4199
4200
4201
4202
4203
4204
4205
4206
4207
4208
4209
4210
4211
4212
4213
4214
4215
4216
4217
4218
4219
4220
4221
4222
4223
4224
4225
4226
4227
4228
4229
4230
4231
4232
4233
4234
4235
4236
4237
4238
4239
4240
4241
4242
4243
4244
4245
4246
4247
4248
4249
4250
4251
4252
4253
4254
4255
4256
4257
4258
4259
4260
4261
4262
4263
4264
4265
4266
4267
4268
4269
4270
4271
4272
4273
4274
4275
4276
4277
4278
4279
4280
4281
4282
4283
4284
4285
4286
4287
4288
4289
4290
4291
4292
4293
4294
4295
4296
4297
4298
4299
4300
4301
4302
4303
4304
4305
4306
4307
4308
4309
4310
4311
4312
4313
4314
4315
4316
4317
4318
4319
4320
4321
4322
4323
4324
4325
4326
4327
4328
4329
4330
4331
4332
4333
4334
4335
4336
4337
4338
4339
4340
4341
4342
4343
4344
4345
4346
4347
4348
4349
4350
4351
4352
4353
4354
4355
4356
4357
4358
4359
4360
4361
4362
4363
4364
4365
4366
4367
4368
4369
4370
4371
4372
4373
4374
4375
4376
4377
4378
4379
4380
4381
4382
4383
4384
4385
4386
4387
4388
4389
4390
4391
4392
4393
4394
4395
4396
4397
4398
4399
4400
4401
4402
4403
4404
4405
4406
4407
4408
4409
4410
4411
4412
4413
4414
4415
4416
4417
4418
4419
4420
4421
4422
4423
4424
4425
4426
4427
4428
4429
4430
4431
4432
4433
4434
4435
4436
4437
4438
4439
4440
4441
4442
4443
4444
4445
4446
4447
4448
4449
4450
4451
4452
4453
4454
4455
4456
4457
4458
4459
4460
4461
4462
4463
4464
4465
4466
4467
4468
4469
4470
4471
4472
4473
4474
4475
4476
4477
4478
4479
4480
4481
4482
4483
4484
4485
4486
4487
4488
4489
4490
4491
4492
4493
4494
4495
4496
4497
4498
4499
4500
4501
4502
4503
4504
4505
4506
4507
4508
4509
4510
4511
4512
4513
4514
4515
4516
4517
4518
4519
4520
4521
4522
4523
4524
4525
4526
4527
4528
4529
4530
4531
4532
4533
4534
4535
4536
4537
4538
4539
4540
4541
4542
4543
4544
4545
4546
4547
4548
4549
4550
4551
4552
4553
4554
4555
4556
4557
4558
4559
4560
4561
4562
4563
4564
4565
4566
4567
4568
4569
4570
4571
4572
4573
4574
4575
4576
4577
4578
4579
4580
4581
4582
4583
4584
4585
4586
4587
4588
4589
4590
4591
4592
4593
4594
4595
4596
4597
4598
4599
4600
4601
4602
4603
4604
4605
4606
4607
4608
4609
4610
4611
4612
4613
4614
4615
4616
4617
4618
4619
4620
4621
4622
4623
4624
4625
4626
4627
4628
4629
4630
4631
4632
4633
4634
4635
4636
4637
4638
4639
4640
4641
4642
4643
4644
4645
4646
4647
4648
4649
4650
4651
4652
4653
4654
4655
4656
4657
4658
4659
4660
4661
4662
4663
4664
4665
4666
4667
4668
4669
4670
4671
4672
4673
4674
4675
4676
4677
4678
4679
4680
4681
4682
4683
4684
4685
4686
4687
4688
4689
4690
4691
4692
4693
4694
4695
4696
4697
4698
4699
4700
4701
4702
4703
4704
4705
4706
4707
4708
4709
4710
4711
4712
4713
4714
4715
4716
4717
4718
4719
4720
4721
4722
4723
4724
4725
4726
4727
4728
4729
4730
4731
4732
4733
4734
4735
4736
4737
4738
4739
4740
4741
4742
4743
4744
4745
4746
4747
4748
4749
4750
4751
4752
4753
4754
4755
4756
4757
4758
4759
4760
4761
4762
4763
4764
4765
4766
4767
4768
4769
4770
4771
4772
4773
4774
4775
4776
4777
4778
4779
4780
4781
4782
4783
4784
4785
4786
4787
4788
4789
4790
4791
4792
4793
4794
4795
4796
4797
4798
4799
4800
4801
4802
4803
4804
4805
4806
4807
4808
4809
4810
4811
4812
4813
4814
4815
4816
4817
4818
4819
4820
4821
4822
4823
4824
4825
4826
4827
4828
4829
4830
4831
4832
4833
4834
4835
4836
4837
4838
4839
4840
4841
4842
4843
4844
4845
4846
4847
4848
4849
4850
4851
4852
4853
4854
4855
4856
4857
4858
4859
4860
4861
4862
4863
4864
4865
4866
4867
4868
4869
4870
4871
4872
4873
4874
4875
4876
4877
4878
4879
4880
4881
4882
4883
4884
4885
4886
4887
4888
4889
4890
4891
4892
4893
4894
4895
4896
4897
4898
4899
4900
4901
4902
4903
4904
4905
4906
4907
4908
4909
4910
4911
4912
4913
4914
4915
4916
4917
4918
4919
4920
4921
4922
4923
4924
4925
4926
4927
4928
4929
4930
4931
4932
4933
4934
4935
4936
4937
4938
4939
4940
4941
4942
4943
4944
4945
4946
4947
4948
4949
4950
4951
4952
4953
4954
4955
4956
4957
4958
4959
4960
4961
4962
4963
4964
4965
4966
4967
4968
4969
4970
4971
4972
4973
4974
4975
4976
4977
4978
4979
4980
4981
4982
4983
4984
4985
4986
4987
4988
4989
4990
4991
4992
4993
4994
4995
4996
4997
4998
4999
5000
5001
5002
5003
5004
5005
5006
5007
5008
5009
5010
5011
5012
5013
5014
5015
5016
5017
5018
5019
5020
5021
5022
5023
5024
5025
5026
5027
5028
5029
5030
5031
5032
5033
5034
5035
5036
5037
5038
5039
5040
5041
5042
5043
5044
5045
5046
5047
5048
5049
5050
5051
5052
5053
5054
5055
5056
5057
5058
5059
5060
5061
5062
5063
5064
5065
5066
5067
5068
5069
5070
5071
5072
5073
5074
5075
5076
5077
5078
5079
5080
5081
5082
5083
5084
5085
5086
5087
5088
5089
5090
5091
5092
5093
5094
5095
5096
5097
5098
5099
5100
5101
5102
5103
5104
5105
5106
5107
5108
5109
5110
5111
5112
5113
5114
5115
5116
5117
5118
5119
5120
5121
5122
5123
5124
5125
5126
5127
5128
5129
5130
5131
5132
5133
5134
5135
5136
5137
5138
5139
5140
5141
5142
5143
5144
5145
5146
5147
5148
5149
5150
5151
5152
5153
5154
5155
5156
5157
5158
5159
5160
5161
5162
5163
5164
5165
5166
5167
5168
5169
5170
5171
5172
5173
5174
5175
5176
5177
5178
5179
5180
5181
5182
5183
5184
5185
5186
5187
5188
5189
5190
5191
5192
5193
5194
5195
5196
5197
5198
5199
5200
5201
5202
5203
5204
5205
5206
5207
5208
5209
5210
5211
5212
5213
5214
5215
5216
5217
5218
5219
5220
5221
5222
5223
5224
5225
5226
5227
5228
5229
5230
5231
5232
5233
5234
5235
5236
5237
5238
5239
5240
5241
5242
5243
5244
5245
5246
5247
5248
5249
5250
5251
5252
5253
5254
5255
5256
5257
5258
5259
5260
5261
5262
5263
5264
5265
5266
5267
5268
5269
5270
5271
5272
5273
5274
5275
5276
5277
5278
5279
5280
5281
5282
5283
5284
5285
5286
5287
5288
5289
5290
5291
5292
5293
5294
5295
5296
5297
5298
5299
5300
5301
5302
5303
5304
5305
5306
5307
5308
5309
5310
5311
5312
5313
5314
5315
5316
5317
5318
5319
5320
5321
5322
5323
5324
5325
5326
5327
5328
5329
5330
5331
5332
5333
5334
5335
5336
5337
5338
5339
5340
5341
5342
5343
5344
5345
5346
5347
5348
5349
5350
5351
5352
5353
5354
5355
5356
5357
5358
5359
5360
5361
5362
5363
5364
5365
5366
5367
5368
5369
5370
5371
5372
5373
5374
5375
5376
5377
5378
5379
5380
5381
5382
5383
5384
5385
5386
5387
5388
5389
5390
5391
5392
5393
5394
5395
5396
5397
5398
5399
5400
5401
5402
5403
5404
5405
5406
5407
5408
5409
5410
5411
5412
5413
5414
5415
5416
5417
5418
5419
5420
5421
5422
5423
5424
5425
5426
5427
5428
5429
5430
5431
5432
5433
5434
5435
5436
5437
5438
5439
5440
5441
5442
5443
5444
5445
5446
5447
5448
5449
5450
5451
5452
5453
5454
5455
5456
5457
5458
5459
5460
5461
5462
5463
5464
5465
5466
5467
5468
5469
5470
5471
5472
5473
5474
5475
5476
5477
5478
5479
5480
5481
5482
5483
5484
5485
5486
5487
5488
5489
5490
5491
5492
5493
5494
5495
5496
5497
5498
5499
5500
5501
5502
5503
5504
5505
5506
5507
5508
5509
5510
5511
5512
5513
5514
5515
5516
5517
5518
5519
5520
5521
5522
5523
5524
5525
5526
5527
5528
5529
5530
5531
5532
5533
5534
5535
5536
5537
5538
5539
5540
5541
5542
5543
5544
5545
5546
5547
5548
5549
5550
5551
5552
5553
5554
5555
5556
5557
5558
5559
5560
5561
5562
5563
5564
5565
5566
5567
5568
5569
5570
5571
5572
5573
5574
5575
5576
5577
5578
5579
5580
5581
5582
5583
5584
5585
5586
5587
5588
5589
5590
5591
5592
5593
5594
5595
5596
5597
5598
5599
5600
5601
5602
5603
5604
5605
5606
5607
5608
5609
5610
5611
5612
5613
5614
5615
5616
5617
5618
5619
5620
5621
5622
5623
5624
5625
5626
5627
5628
5629
5630
5631
5632
5633
5634
5635
5636
5637
5638
5639
5640
5641
5642
5643
5644
5645
5646
5647
5648
5649
5650
5651
5652
5653
5654
5655
5656
5657
5658
5659
5660
5661
5662
5663
5664
5665
5666
5667
5668
5669
5670
5671
5672
5673
5674
5675
5676
5677
5678
5679
5680
5681
5682
5683
5684
5685
5686
5687
5688
5689
5690
5691
5692
5693
5694
5695
5696
5697
5698
5699
5700
5701
5702
5703
5704
5705
5706
5707
5708
5709
5710
5711
5712
5713
5714
5715
5716
5717
5718
5719
5720
5721
5722
5723
5724
5725
5726
5727
5728
5729
5730
5731
5732
5733
5734
5735
5736
5737
5738
5739
5740
5741
5742
5743
5744
5745
5746
5747
5748
5749
5750
5751
5752
5753
5754
5755
5756
5757
5758
5759
5760
5761
5762
5763
5764
5765
5766
5767
5768
5769
5770
5771
5772
5773
5774
5775
5776
5777
5778
5779
5780
5781
5782
5783
5784
5785
5786
5787
5788
5789
5790
5791
5792
5793
5794
5795
5796
5797
5798
5799
5800
5801
5802
5803
5804
5805
5806
5807
5808
5809
5810
5811
5812
5813
5814
5815
5816
5817
5818
5819
5820
5821
5822
5823
5824
5825
5826
5827
5828
5829
5830
5831
5832
5833
5834
5835
5836
5837
5838
5839
5840
5841
5842
5843
5844
5845
5846
5847
5848
5849
5850
5851
5852
5853
5854
5855
5856
5857
5858
5859
5860
5861
5862
5863
5864
5865
5866
5867
5868
5869
5870
5871
5872
5873
5874
5875
5876
5877
5878
5879
5880
5881
5882
5883
5884
5885
5886
5887
5888
5889
5890
5891
5892
5893
5894
5895
5896
5897
5898
5899
5900
5901
5902
5903
5904
5905
5906
5907
5908
5909
5910
5911
5912
5913
5914
5915
5916
5917
5918
5919
5920
5921
5922
5923
5924
5925
5926
5927
5928
5929
5930
5931
5932
5933
5934
5935
5936
5937
5938
5939
5940
5941
5942
5943
5944
5945
5946
5947
5948
5949
5950
5951
5952
5953
5954
5955
5956
5957
5958
5959
5960
5961
5962
5963
5964
5965
5966
5967
5968
5969
5970
5971
5972
5973
5974
5975
5976
5977
5978
5979
5980
5981
5982
5983
5984
5985
5986
5987
5988
5989
5990
5991
5992
5993
5994
5995
5996
5997
5998
5999
6000
6001
6002
6003
6004
6005
6006
6007
6008
6009
6010
6011
6012
6013
6014
6015
6016
6017
6018
6019
6020
6021
6022
6023
6024
6025
6026
6027
6028
6029
6030
6031
6032
6033
6034
6035
6036
6037
6038
6039
6040
6041
6042
6043
6044
6045
6046
6047
6048
6049
6050
6051
6052
6053
6054
6055
6056
6057
6058
6059
6060
6061
6062
6063
6064
6065
6066
6067
6068
6069
6070
6071
6072
6073
6074
6075
6076
6077
6078
6079
6080
6081
6082
6083
6084
6085
6086
6087
6088
6089
6090
6091
6092
6093
6094
6095
6096
6097
6098
6099
6100
6101
6102
6103
6104
6105
6106
6107
6108
6109
6110
6111
6112
6113
6114
6115
6116
6117
6118
6119
6120
6121
6122
6123
6124
6125
6126
6127
6128
6129
6130
6131
6132
6133
6134
6135
6136
6137
6138
6139
6140
6141
6142
6143
6144
6145
6146
6147
6148
6149
6150
6151
6152
6153
6154
6155
6156
6157
6158
6159
6160
6161
6162
6163
6164
6165
6166
6167
6168
6169
6170
6171
6172
6173
6174
6175
6176
6177
6178
6179
6180
6181
6182
6183
6184
6185
6186
6187
6188
6189
6190
6191
6192
6193
6194
6195
6196
6197
6198
6199
6200
6201
6202
6203
6204
6205
6206
6207
6208
6209
6210
6211
6212
6213
6214
6215
6216
6217
6218
6219
6220
6221
6222
6223
6224
6225
6226
6227
6228
6229
6230
6231
6232
6233
6234
6235
6236
6237
6238
6239
6240
6241
6242
6243
6244
6245
6246
6247
6248
6249
6250
6251
6252
6253
6254
6255
6256
6257
6258
6259
6260
6261
6262
6263
6264
6265
6266
6267
6268
6269
6270
6271
6272
6273
6274
6275
6276
6277
6278
6279
6280
6281
6282
6283
6284
6285
6286
6287
6288
6289
6290
6291
6292
6293
6294
6295
6296
6297
6298
6299
6300
6301
6302
6303
6304
6305
6306
6307
6308
6309
6310
6311
6312
6313
6314
6315
6316
6317
6318
6319
6320
6321
6322
6323
6324
6325
6326
6327
6328
6329
6330
6331
6332
6333
6334
6335
6336
6337
6338
6339
6340
6341
6342
6343
6344
6345
6346
6347
6348
6349
6350
6351
6352
6353
6354
6355
6356
6357
6358
6359
6360
6361
6362
6363
6364
6365
6366
6367
6368
6369
6370
6371
6372
6373
6374
6375
6376
6377
6378
6379
6380
6381
6382
6383
6384
6385
6386
6387
6388
6389
6390
6391
6392
6393
6394
6395
6396
6397
6398
6399
6400
6401
6402
6403
6404
6405
6406
6407
6408
6409
6410
6411
6412
6413
6414
6415
6416
6417
6418
6419
6420
6421
6422
6423
6424
6425
6426
6427
6428
6429
6430
6431
6432
6433
6434
6435
6436
6437
6438
6439
6440
6441
6442
6443
6444
6445
6446
6447
6448
6449
6450
6451
6452
6453
6454
6455
6456
6457
6458
6459
6460
6461
6462
6463
6464
6465
6466
6467
6468
6469
6470
6471
6472
6473
6474
6475
6476
6477
6478
6479
6480
6481
6482
6483
6484
6485
6486
6487
6488
6489
6490
6491
6492
6493
6494
6495
6496
6497
6498
6499
6500
6501
6502
6503
6504
6505
6506
6507
6508
6509
6510
6511
6512
6513
6514
6515
6516
6517
6518
6519
6520
6521
6522
6523
6524
6525
6526
6527
6528
6529
6530
6531
6532
6533
6534
6535
6536
6537
6538
6539
6540
6541
6542
6543
6544
6545
6546
6547
6548
6549
6550
6551
6552
6553
6554
6555
6556
6557
6558
6559
6560
6561
6562
6563
6564
6565
6566
6567
6568
6569
6570
6571
6572
6573
6574
6575
6576
6577
6578
6579
6580
6581
6582
6583
6584
6585
6586
6587
6588
6589
6590
6591
6592
6593
6594
6595
6596
6597
6598
6599
6600
6601
6602
6603
6604
6605
6606
6607
6608
6609
6610
6611
6612
6613
6614
6615
6616
6617
6618
6619
6620
6621
6622
6623
6624
6625
6626
6627
6628
6629
6630
6631
6632
6633
6634
6635
6636
6637
6638
6639
6640
6641
6642
6643
6644
6645
6646
6647
6648
6649
6650
6651
6652
6653
6654
6655
6656
6657
6658
6659
6660
6661
6662
6663
6664
6665
6666
6667
6668
6669
6670
6671
6672
6673
6674
6675
6676
6677
6678
6679
6680
6681
6682
6683
6684
6685
6686
6687
6688
6689
6690
6691
6692
6693
6694
6695
6696
6697
6698
6699
6700
6701
6702
6703
6704
6705
6706
6707
6708
6709
6710
6711
6712
6713
6714
6715
6716
6717
6718
6719
6720
6721
6722
6723
6724
6725
6726
6727
6728
6729
6730
6731
6732
6733
6734
6735
6736
6737
6738
6739
6740
6741
6742
6743
6744
6745
6746
6747
6748
6749
6750
6751
6752
6753
6754
6755
6756
6757
6758
6759
6760
6761
6762
6763
6764
6765
/* xfaces.c -- "Face" primitives.

   Copyright (C) 1993, 1994, 1998, 1999, 2000, 2001, 2002, 2003, 2004,
  2005, 2006, 2007, 2008, 2009, 2010, 2011
  Free Software Foundation, Inc.

This file is part of GNU Emacs.

GNU Emacs is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

GNU Emacs is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.  */

/* New face implementation by Gerd Moellmann <gerd@gnu.org>.  */

/* Faces.

   When using Emacs with X, the display style of characters can be
   changed by defining `faces'.  Each face can specify the following
   display attributes:

   1. Font family name.

   2. Font foundary name.

   3. Relative proportionate width, aka character set width or set
   width (swidth), e.g. `semi-compressed'.

   4. Font height in 1/10pt.

   5. Font weight, e.g. `bold'.

   6. Font slant, e.g. `italic'.

   7. Foreground color.

   8. Background color.

   9. Whether or not characters should be underlined, and in what color.

   10. Whether or not characters should be displayed in inverse video.

   11. A background stipple, a bitmap.

   12. Whether or not characters should be overlined, and in what color.

   13. Whether or not characters should be strike-through, and in what
   color.

   14. Whether or not a box should be drawn around characters, the box
   type, and, for simple boxes, in what color.

   15. Font-spec, or nil.  This is a special attribute.

   A font-spec is a collection of font attributes (specs).

   When this attribute is specified, the face uses a font matching
   with the specs as is except for what overwritten by the specs in
   the fontset (see below).  In addition, the other font-related
   attributes (1st thru 5th) are updated from the spec.

   On the other hand, if one of the other font-related attributes are
   specified, the correspoinding specs in this attribute is set to nil.

   15. A face name or list of face names from which to inherit attributes.

   16. A specified average font width, which is invisible from Lisp,
   and is used to ensure that a font specified on the command line,
   for example, can be matched exactly.

   17. A fontset name.  This is another special attribute.

   A fontset is a mappings from characters to font-specs, and the
   specs overwrite the font-spec in the 14th attribute.


   Faces are frame-local by nature because Emacs allows to define the
   same named face (face names are symbols) differently for different
   frames.  Each frame has an alist of face definitions for all named
   faces.  The value of a named face in such an alist is a Lisp vector
   with the symbol `face' in slot 0, and a slot for each of the face
   attributes mentioned above.

   There is also a global face alist `Vface_new_frame_defaults'.  Face
   definitions from this list are used to initialize faces of newly
   created frames.

   A face doesn't have to specify all attributes.  Those not specified
   have a value of `unspecified'.  Faces specifying all attributes but
   the 14th are called `fully-specified'.


   Face merging.

   The display style of a given character in the text is determined by
   combining several faces.  This process is called `face merging'.
   Any aspect of the display style that isn't specified by overlays or
   text properties is taken from the `default' face.  Since it is made
   sure that the default face is always fully-specified, face merging
   always results in a fully-specified face.


   Face realization.

   After all face attributes for a character have been determined by
   merging faces of that character, that face is `realized'.  The
   realization process maps face attributes to what is physically
   available on the system where Emacs runs.  The result is a
   `realized face' in form of a struct face which is stored in the
   face cache of the frame on which it was realized.

   Face realization is done in the context of the character to display
   because different fonts may be used for different characters.  In
   other words, for characters that have different font
   specifications, different realized faces are needed to display
   them.

   Font specification is done by fontsets.  See the comment in
   fontset.c for the details.  In the current implementation, all ASCII
   characters share the same font in a fontset.

   Faces are at first realized for ASCII characters, and, at that
   time, assigned a specific realized fontset.  Hereafter, we call
   such a face as `ASCII face'.  When a face for a multibyte character
   is realized, it inherits (thus shares) a fontset of an ASCII face
   that has the same attributes other than font-related ones.

   Thus, all realized faces have a realized fontset.


   Unibyte text.

   Unibyte text (i.e. raw 8-bit characters) is displayed with the same
   font as ASCII characters.  That is because it is expected that
   unibyte text users specify a font that is suitable both for ASCII
   and raw 8-bit characters.


   Font selection.

   Font selection tries to find the best available matching font for a
   given (character, face) combination.

   If the face specifies a fontset name, that fontset determines a
   pattern for fonts of the given character.  If the face specifies a
   font name or the other font-related attributes, a fontset is
   realized from the default fontset.  In that case, that
   specification determines a pattern for ASCII characters and the
   default fontset determines a pattern for multibyte characters.

   Available fonts on the system on which Emacs runs are then matched
   against the font pattern.  The result of font selection is the best
   match for the given face attributes in this font list.

   Font selection can be influenced by the user.

   1. The user can specify the relative importance he gives the face
   attributes width, height, weight, and slant by setting
   face-font-selection-order (faces.el) to a list of face attribute
   names.  The default is '(:width :height :weight :slant), and means
   that font selection first tries to find a good match for the font
   width specified by a face, then---within fonts with that
   width---tries to find a best match for the specified font height,
   etc.

   2. Setting face-font-family-alternatives allows the user to
   specify alternative font families to try if a family specified by a
   face doesn't exist.

   3. Setting face-font-registry-alternatives allows the user to
   specify all alternative font registries to try for a face
   specifying a registry.

   4. Setting face-ignored-fonts allows the user to ignore specific
   fonts.


   Character composition.

   Usually, the realization process is already finished when Emacs
   actually reflects the desired glyph matrix on the screen.  However,
   on displaying a composition (sequence of characters to be composed
   on the screen), a suitable font for the components of the
   composition is selected and realized while drawing them on the
   screen, i.e.  the realization process is delayed but in principle
   the same.


   Initialization of basic faces.

   The faces `default', `modeline' are considered `basic faces'.
   When redisplay happens the first time for a newly created frame,
   basic faces are realized for CHARSET_ASCII.  Frame parameters are
   used to fill in unspecified attributes of the default face.  */

#include <config.h>
#include <stdio.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <stdio.h>              /* This needs to be before termchar.h */
#include <setjmp.h>

#include "lisp.h"
#include "character.h"
#include "charset.h"
#include "keyboard.h"
#include "frame.h"
#include "termhooks.h"

#ifdef HAVE_X_WINDOWS
#include "xterm.h"
#ifdef USE_MOTIF
#include <Xm/Xm.h>
#include <Xm/XmStrDefs.h>
#endif /* USE_MOTIF */
#endif /* HAVE_X_WINDOWS */

#ifdef MSDOS
#include "dosfns.h"
#endif

#ifdef WINDOWSNT
#include "w32term.h"
#include "fontset.h"
/* Redefine X specifics to W32 equivalents to avoid cluttering the
   code with #ifdef blocks. */
#undef FRAME_X_DISPLAY_INFO
#define FRAME_X_DISPLAY_INFO FRAME_W32_DISPLAY_INFO
#define x_display_info w32_display_info
#define FRAME_X_FONT_TABLE FRAME_W32_FONT_TABLE
#define check_x check_w32
#define GCGraphicsExposures 0
#endif /* WINDOWSNT */

#ifdef HAVE_NS
#include "nsterm.h"
#undef FRAME_X_DISPLAY_INFO
#define FRAME_X_DISPLAY_INFO FRAME_NS_DISPLAY_INFO
#define x_display_info ns_display_info
#define FRAME_X_FONT_TABLE FRAME_NS_FONT_TABLE
#define check_x check_ns
#define GCGraphicsExposures 0
#endif /* HAVE_NS */

#include "buffer.h"
#include "dispextern.h"
#include "blockinput.h"
#include "window.h"
#include "intervals.h"
#include "termchar.h"

#include "font.h"
#ifdef HAVE_WINDOW_SYSTEM
#include "fontset.h"
#endif /* HAVE_WINDOW_SYSTEM */

#ifdef HAVE_X_WINDOWS

/* Compensate for a bug in Xos.h on some systems, on which it requires
   time.h.  On some such systems, Xos.h tries to redefine struct
   timeval and struct timezone if USG is #defined while it is
   #included.  */

#ifdef XOS_NEEDS_TIME_H
#include <time.h>
#undef USG
#include <X11/Xos.h>
#define USG
#define __TIMEVAL__
#else /* not XOS_NEEDS_TIME_H */
#include <X11/Xos.h>
#endif /* not XOS_NEEDS_TIME_H */

#endif /* HAVE_X_WINDOWS */

#include <ctype.h>

/* Number of pt per inch (from the TeXbook).  */

#define PT_PER_INCH 72.27

/* Non-zero if face attribute ATTR is unspecified.  */

#define UNSPECIFIEDP(ATTR) EQ ((ATTR), Qunspecified)

/* Non-zero if face attribute ATTR is `ignore-defface'.  */

#define IGNORE_DEFFACE_P(ATTR) EQ ((ATTR), Qignore_defface)

/* Value is the number of elements of VECTOR.  */

#define DIM(VECTOR) (sizeof (VECTOR) / sizeof *(VECTOR))

/* Make a copy of string S on the stack using alloca.  Value is a pointer
   to the copy.  */

#define STRDUPA(S) strcpy ((char *) alloca (strlen ((S)) + 1), (S))

/* Make a copy of the contents of Lisp string S on the stack using
   alloca.  Value is a pointer to the copy.  */

#define LSTRDUPA(S) STRDUPA (SDATA ((S)))

/* Size of hash table of realized faces in face caches (should be a
   prime number).  */

#define FACE_CACHE_BUCKETS_SIZE 1001

/* Keyword symbols used for face attribute names.  */

Lisp_Object QCfamily, QCheight, QCweight, QCslant, QCunderline;
Lisp_Object QCinverse_video, QCforeground, QCbackground, QCstipple;
Lisp_Object QCwidth, QCfont, QCbold, QCitalic;
Lisp_Object QCreverse_video;
Lisp_Object QCoverline, QCstrike_through, QCbox, QCinherit;
Lisp_Object QCfontset;

/* Symbols used for attribute values.  */

Lisp_Object Qnormal, Qbold, Qultra_light, Qextra_light, Qlight;
Lisp_Object Qsemi_light, Qsemi_bold, Qextra_bold, Qultra_bold;
Lisp_Object Qoblique, Qitalic, Qreverse_oblique, Qreverse_italic;
Lisp_Object Qultra_condensed, Qextra_condensed, Qcondensed;
Lisp_Object Qsemi_condensed, Qsemi_expanded, Qexpanded, Qextra_expanded;
Lisp_Object Qultra_expanded;
Lisp_Object Qreleased_button, Qpressed_button;
Lisp_Object QCstyle, QCcolor, QCline_width;
Lisp_Object Qunspecified;
Lisp_Object Qignore_defface;

char unspecified_fg[] = "unspecified-fg", unspecified_bg[] = "unspecified-bg";

/* The name of the function to call when the background of the frame
   has changed, frame_set_background_mode.  */

Lisp_Object Qframe_set_background_mode;

/* Names of basic faces.  */

Lisp_Object Qdefault, Qtool_bar, Qregion, Qfringe;
Lisp_Object Qheader_line, Qscroll_bar, Qcursor, Qborder, Qmouse, Qmenu;
Lisp_Object Qmode_line_inactive, Qvertical_border;

/* The symbol `face-alias'.  A symbols having that property is an
   alias for another face.  Value of the property is the name of
   the aliased face.  */

Lisp_Object Qface_alias;

/* Alist of alternative font families.  Each element is of the form
   (FAMILY FAMILY1 FAMILY2 ...).  If fonts of FAMILY can't be loaded,
   try FAMILY1, then FAMILY2, ...  */

Lisp_Object Vface_alternative_font_family_alist;

/* Alist of alternative font registries.  Each element is of the form
   (REGISTRY REGISTRY1 REGISTRY2...).  If fonts of REGISTRY can't be
   loaded, try REGISTRY1, then REGISTRY2, ...  */

Lisp_Object Vface_alternative_font_registry_alist;

/* Allowed scalable fonts.  A value of nil means don't allow any
   scalable fonts.  A value of t means allow the use of any scalable
   font.  Otherwise, value must be a list of regular expressions.  A
   font may be scaled if its name matches a regular expression in the
   list.  */

Lisp_Object Qscalable_fonts_allowed;

#define DEFAULT_FONT_LIST_LIMIT 100

/* The symbols `foreground-color' and `background-color' which can be
   used as part of a `face' property.  This is for compatibility with
   Emacs 20.2.  */

Lisp_Object Qforeground_color, Qbackground_color;

/* The symbols `face' and `mouse-face' used as text properties.  */

Lisp_Object Qface;

/* Property for basic faces which other faces cannot inherit.  */

Lisp_Object Qface_no_inherit;

/* Error symbol for wrong_type_argument in load_pixmap.  */

Lisp_Object Qbitmap_spec_p;

/* The next ID to assign to Lisp faces.  */

static int next_lface_id;

/* A vector mapping Lisp face Id's to face names.  */

static Lisp_Object *lface_id_to_name;
static int lface_id_to_name_size;

/* TTY color-related functions (defined in tty-colors.el).  */

Lisp_Object Qtty_color_desc, Qtty_color_by_index, Qtty_color_standard_values;

/* The name of the function used to compute colors on TTYs.  */

Lisp_Object Qtty_color_alist;

/* Counter for calls to clear_face_cache.  If this counter reaches
   CLEAR_FONT_TABLE_COUNT, and a frame has more than
   CLEAR_FONT_TABLE_NFONTS load, unused fonts are freed.  */

static int clear_font_table_count;
#define CLEAR_FONT_TABLE_COUNT	100
#define CLEAR_FONT_TABLE_NFONTS	10

/* Non-zero means face attributes have been changed since the last
   redisplay.  Used in redisplay_internal.  */

int face_change_count;

/* Non-zero means don't display bold text if a face's foreground
   and background colors are the inverse of the default colors of the
   display.   This is a kluge to suppress `bold black' foreground text
   which is hard to read on an LCD monitor.  */

int tty_suppress_bold_inverse_default_colors_p;

/* A list of the form `((x . y))' used to avoid consing in
   Finternal_set_lisp_face_attribute.  */

static Lisp_Object Vparam_value_alist;

/* The total number of colors currently allocated.  */

#if GLYPH_DEBUG
static int ncolors_allocated;
static int npixmaps_allocated;
static int ngcs;
#endif

/* Non-zero means the definition of the `menu' face for new frames has
   been changed.  */

int menu_face_changed_default;


/* Function prototypes.  */

struct table_entry;
struct named_merge_point;

static void map_tty_color (struct frame *, struct face *,
                           enum lface_attribute_index, int *);
static Lisp_Object resolve_face_name (Lisp_Object, int);
static void set_font_frame_param (Lisp_Object, Lisp_Object);
static int get_lface_attributes (struct frame *, Lisp_Object, Lisp_Object *,
                                 int, struct named_merge_point *);
static int load_pixmap (struct frame *, Lisp_Object, unsigned *, unsigned *);
static struct frame *frame_or_selected_frame (Lisp_Object, int);
static void load_face_colors (struct frame *, struct face *, Lisp_Object *);
static void free_face_colors (struct frame *, struct face *);
static int face_color_gray_p (struct frame *, const char *);
static struct face *realize_face (struct face_cache *, Lisp_Object *,
                                  int);
static struct face *realize_non_ascii_face (struct frame *, Lisp_Object,
                                            struct face *);
static struct face *realize_x_face (struct face_cache *, Lisp_Object *);
static struct face *realize_tty_face (struct face_cache *, Lisp_Object *);
static int realize_basic_faces (struct frame *);
static int realize_default_face (struct frame *);
static void realize_named_face (struct frame *, Lisp_Object, int);
static int lface_fully_specified_p (Lisp_Object *);
static int lface_equal_p (Lisp_Object *, Lisp_Object *);
static unsigned hash_string_case_insensitive (Lisp_Object);
static unsigned lface_hash (Lisp_Object *);
static int lface_same_font_attributes_p (Lisp_Object *, Lisp_Object *);
static struct face_cache *make_face_cache (struct frame *);
static void clear_face_gcs (struct face_cache *);
static void free_face_cache (struct face_cache *);
static int face_fontset (Lisp_Object *);
static void merge_face_vectors (struct frame *, Lisp_Object *, Lisp_Object*,
                                struct named_merge_point *);
static int merge_face_ref (struct frame *, Lisp_Object, Lisp_Object *,
                           int, struct named_merge_point *);
static int set_lface_from_font (struct frame *, Lisp_Object, Lisp_Object,
                                int);
static Lisp_Object lface_from_face_name (struct frame *, Lisp_Object, int);
static struct face *make_realized_face (Lisp_Object *);
static void cache_face (struct face_cache *, struct face *, unsigned);
static void uncache_face (struct face_cache *, struct face *);

#ifdef HAVE_WINDOW_SYSTEM

static GC x_create_gc (struct frame *, unsigned long, XGCValues *);
static void x_free_gc (struct frame *, GC);

#ifdef USE_X_TOOLKIT
static void x_update_menu_appearance (struct frame *);

extern void free_frame_menubar (struct frame *);
#endif /* USE_X_TOOLKIT */

#endif /* HAVE_WINDOW_SYSTEM */


/***********************************************************************
			      Utilities
 ***********************************************************************/

#ifdef HAVE_X_WINDOWS

#ifdef DEBUG_X_COLORS

/* The following is a poor mans infrastructure for debugging X color
   allocation problems on displays with PseudoColor-8.  Some X servers
   like 3.3.5 XF86_SVGA with Matrox cards apparently don't implement
   color reference counts completely so that they don't signal an
   error when a color is freed whose reference count is already 0.
   Other X servers do.  To help me debug this, the following code
   implements a simple reference counting schema of its own, for a
   single display/screen.  --gerd.  */

/* Reference counts for pixel colors.  */

int color_count[256];

/* Register color PIXEL as allocated.  */

void
register_color (pixel)
     unsigned long pixel;
{
  xassert (pixel < 256);
  ++color_count[pixel];
}


/* Register color PIXEL as deallocated.  */

void
unregister_color (pixel)
     unsigned long pixel;
{
  xassert (pixel < 256);
  if (color_count[pixel] > 0)
    --color_count[pixel];
  else
    abort ();
}


/* Register N colors from PIXELS as deallocated.  */

void
unregister_colors (pixels, n)
     unsigned long *pixels;
     int n;
{
  int i;
  for (i = 0; i < n; ++i)
    unregister_color (pixels[i]);
}


DEFUN ("dump-colors", Fdump_colors, Sdump_colors, 0, 0, 0,
       doc: /* Dump currently allocated colors to stderr.  */)
  (void)
{
  int i, n;

  fputc ('\n', stderr);

  for (i = n = 0; i < sizeof color_count / sizeof color_count[0]; ++i)
    if (color_count[i])
      {
	fprintf (stderr, "%3d: %5d", i, color_count[i]);
	++n;
	if (n % 5 == 0)
	  fputc ('\n', stderr);
	else
	  fputc ('\t', stderr);
      }

  if (n % 5 != 0)
    fputc ('\n', stderr);
  return Qnil;
}

#endif /* DEBUG_X_COLORS */


/* Free colors used on frame F.  PIXELS is an array of NPIXELS pixel
   color values.  Interrupt input must be blocked when this function
   is called.  */

void
x_free_colors (struct frame *f, long unsigned int *pixels, int npixels)
{
  int class = FRAME_X_DISPLAY_INFO (f)->visual->class;

  /* If display has an immutable color map, freeing colors is not
     necessary and some servers don't allow it.  So don't do it.  */
  if (class != StaticColor && class != StaticGray && class != TrueColor)
    {
#ifdef DEBUG_X_COLORS
      unregister_colors (pixels, npixels);
#endif
      XFreeColors (FRAME_X_DISPLAY (f), FRAME_X_COLORMAP (f),
		   pixels, npixels, 0);
    }
}


/* Free colors used on frame F.  PIXELS is an array of NPIXELS pixel
   color values.  Interrupt input must be blocked when this function
   is called.  */

void
x_free_dpy_colors (Display *dpy, Screen *screen, Colormap cmap, long unsigned int *pixels, int npixels)
{
  struct x_display_info *dpyinfo = x_display_info_for_display (dpy);
  int class = dpyinfo->visual->class;

  /* If display has an immutable color map, freeing colors is not
     necessary and some servers don't allow it.  So don't do it.  */
  if (class != StaticColor && class != StaticGray && class != TrueColor)
    {
#ifdef DEBUG_X_COLORS
      unregister_colors (pixels, npixels);
#endif
      XFreeColors (dpy, cmap, pixels, npixels, 0);
    }
}


/* Create and return a GC for use on frame F.  GC values and mask
   are given by XGCV and MASK.  */

static INLINE GC
x_create_gc (struct frame *f, long unsigned int mask, XGCValues *xgcv)
{
  GC gc;
  BLOCK_INPUT;
  gc = XCreateGC (FRAME_X_DISPLAY (f), FRAME_X_WINDOW (f), mask, xgcv);
  UNBLOCK_INPUT;
  IF_DEBUG (++ngcs);
  return gc;
}


/* Free GC which was used on frame F.  */

static INLINE void
x_free_gc (struct frame *f, GC gc)
{
  eassert (interrupt_input_blocked);
  IF_DEBUG (xassert (--ngcs >= 0));
  XFreeGC (FRAME_X_DISPLAY (f), gc);
}

#endif /* HAVE_X_WINDOWS */

#ifdef WINDOWSNT
/* W32 emulation of GCs */

static INLINE GC
x_create_gc (struct frame *f, unsigned long mask, XGCValues *xgcv)
{
  GC gc;
  BLOCK_INPUT;
  gc = XCreateGC (NULL, FRAME_W32_WINDOW (f), mask, xgcv);
  UNBLOCK_INPUT;
  IF_DEBUG (++ngcs);
  return gc;
}


/* Free GC which was used on frame F.  */

static INLINE void
x_free_gc (struct frame *f, GC gc)
{
  IF_DEBUG (xassert (--ngcs >= 0));
  xfree (gc);
}

#endif  /* WINDOWSNT */

#ifdef HAVE_NS
/* NS emulation of GCs */

static INLINE GC
x_create_gc (struct frame *f,
             unsigned long mask,
             XGCValues *xgcv)
{
  GC gc = xmalloc (sizeof (*gc));
  if (gc)
    memcpy (gc, xgcv, sizeof (XGCValues));
  return gc;
}

static INLINE void
x_free_gc (struct frame *f, GC gc)
{
  xfree (gc);
}
#endif  /* HAVE_NS */

/* Like strcasecmp/stricmp.  Used to compare parts of font names which
   are in ISO8859-1.  */

int
xstrcasecmp (const unsigned char *s1, const unsigned char *s2)
{
  while (*s1 && *s2)
    {
      unsigned char c1 = tolower (*s1);
      unsigned char c2 = tolower (*s2);
      if (c1 != c2)
	return c1 < c2 ? -1 : 1;
      ++s1, ++s2;
    }

  if (*s1 == 0)
    return *s2 == 0 ? 0 : -1;
  return 1;
}


/* If FRAME is nil, return a pointer to the selected frame.
   Otherwise, check that FRAME is a live frame, and return a pointer
   to it.  NPARAM is the parameter number of FRAME, for
   CHECK_LIVE_FRAME.  This is here because it's a frequent pattern in
   Lisp function definitions.  */

static INLINE struct frame *
frame_or_selected_frame (Lisp_Object frame, int nparam)
{
  if (NILP (frame))
    frame = selected_frame;

  CHECK_LIVE_FRAME (frame);
  return XFRAME (frame);
}


/***********************************************************************
			   Frames and faces
 ***********************************************************************/

/* Initialize face cache and basic faces for frame F.  */

void
init_frame_faces (struct frame *f)
{
  /* Make a face cache, if F doesn't have one.  */
  if (FRAME_FACE_CACHE (f) == NULL)
    FRAME_FACE_CACHE (f) = make_face_cache (f);

#ifdef HAVE_WINDOW_SYSTEM
  /* Make the image cache.  */
  if (FRAME_WINDOW_P (f))
    {
      /* We initialize the image cache when creating the first frame
	 on a terminal, and not during terminal creation.  This way,
	 `x-open-connection' on a tty won't create an image cache.  */
      if (FRAME_IMAGE_CACHE (f) == NULL)
	FRAME_IMAGE_CACHE (f) = make_image_cache ();
      ++FRAME_IMAGE_CACHE (f)->refcount;
    }
#endif /* HAVE_WINDOW_SYSTEM */

  /* Realize basic faces.  Must have enough information in frame
     parameters to realize basic faces at this point.  */
#ifdef HAVE_X_WINDOWS
  if (!FRAME_X_P (f) || FRAME_X_WINDOW (f))
#endif
#ifdef WINDOWSNT
  if (!FRAME_WINDOW_P (f) || FRAME_W32_WINDOW (f))
#endif
#ifdef HAVE_NS
  if (!FRAME_NS_P (f) || FRAME_NS_WINDOW (f))
#endif
    if (!realize_basic_faces (f))
        abort ();
}


/* Free face cache of frame F.  Called from delete_frame.  */

void
free_frame_faces (struct frame *f)
{
  struct face_cache *face_cache = FRAME_FACE_CACHE (f);

  if (face_cache)
    {
      free_face_cache (face_cache);
      FRAME_FACE_CACHE (f) = NULL;
    }

#ifdef HAVE_WINDOW_SYSTEM
  if (FRAME_WINDOW_P (f))
    {
      struct image_cache *image_cache = FRAME_IMAGE_CACHE (f);
      if (image_cache)
	{
	  --image_cache->refcount;
	  if (image_cache->refcount == 0)
	    free_image_cache (f);
	}
    }
#endif /* HAVE_WINDOW_SYSTEM */
}


/* Clear face caches, and recompute basic faces for frame F.  Call
   this after changing frame parameters on which those faces depend,
   or when realized faces have been freed due to changing attributes
   of named faces. */

void
recompute_basic_faces (struct frame *f)
{
  if (FRAME_FACE_CACHE (f))
    {
      clear_face_cache (0);
      if (!realize_basic_faces (f))
	abort ();
    }
}


/* Clear the face caches of all frames.  CLEAR_FONTS_P non-zero means
   try to free unused fonts, too.  */

void
clear_face_cache (int clear_fonts_p)
{
#ifdef HAVE_WINDOW_SYSTEM
  Lisp_Object tail, frame;
  struct frame *f;

  if (clear_fonts_p
      || ++clear_font_table_count == CLEAR_FONT_TABLE_COUNT)
    {
#if 0
      /* Not yet implemented.  */
      clear_font_cache (frame);
#endif

      /* From time to time see if we can unload some fonts.  This also
	 frees all realized faces on all frames.  Fonts needed by
	 faces will be loaded again when faces are realized again.  */
      clear_font_table_count = 0;

      FOR_EACH_FRAME (tail, frame)
	{
	  struct frame *f = XFRAME (frame);
	  if (FRAME_WINDOW_P (f)
	      && FRAME_X_DISPLAY_INFO (f)->n_fonts > CLEAR_FONT_TABLE_NFONTS)
	    free_all_realized_faces (frame);
	}
    }
  else
    {
      /* Clear GCs of realized faces.  */
      FOR_EACH_FRAME (tail, frame)
	{
	  f = XFRAME (frame);
	  if (FRAME_WINDOW_P (f))
	      clear_face_gcs (FRAME_FACE_CACHE (f));
	}
      clear_image_caches (Qnil);
    }
#endif /* HAVE_WINDOW_SYSTEM */
}


DEFUN ("clear-face-cache", Fclear_face_cache, Sclear_face_cache, 0, 1, 0,
       doc: /* Clear face caches on all frames.
Optional THOROUGHLY non-nil means try to free unused fonts, too.  */)
  (Lisp_Object thoroughly)
{
  clear_face_cache (!NILP (thoroughly));
  ++face_change_count;
  ++windows_or_buffers_changed;
  return Qnil;
}


/***********************************************************************
			      X Pixmaps
 ***********************************************************************/

#ifdef HAVE_WINDOW_SYSTEM

DEFUN ("bitmap-spec-p", Fbitmap_spec_p, Sbitmap_spec_p, 1, 1, 0,
       doc: /* Value is non-nil if OBJECT is a valid bitmap specification.
A bitmap specification is either a string, a file name, or a list
\(WIDTH HEIGHT DATA) where WIDTH is the pixel width of the bitmap,
HEIGHT is its height, and DATA is a string containing the bits of
the pixmap.  Bits are stored row by row, each row occupies
\(WIDTH + 7)/8 bytes.  */)
  (Lisp_Object object)
{
  int pixmap_p = 0;

  if (STRINGP (object))
    /* If OBJECT is a string, it's a file name.  */
    pixmap_p = 1;
  else if (CONSP (object))
    {
      /* Otherwise OBJECT must be (WIDTH HEIGHT DATA), WIDTH and
	 HEIGHT must be integers > 0, and DATA must be string large
	 enough to hold a bitmap of the specified size.  */
      Lisp_Object width, height, data;

      height = width = data = Qnil;

      if (CONSP (object))
	{
	  width = XCAR (object);
	  object = XCDR (object);
	  if (CONSP (object))
	    {
	      height = XCAR (object);
	      object = XCDR (object);
	      if (CONSP (object))
		data = XCAR (object);
	    }
	}

      if (NATNUMP (width) && NATNUMP (height) && STRINGP (data))
	{
	  int bytes_per_row = ((XFASTINT (width) + BITS_PER_CHAR - 1)
			       / BITS_PER_CHAR);
	  if (SBYTES (data) >= bytes_per_row * XINT (height))
	    pixmap_p = 1;
	}
    }

  return pixmap_p ? Qt : Qnil;
}


/* Load a bitmap according to NAME (which is either a file name or a
   pixmap spec) for use on frame F.  Value is the bitmap_id (see
   xfns.c).  If NAME is nil, return with a bitmap id of zero.  If
   bitmap cannot be loaded, display a message saying so, and return
   zero.  Store the bitmap width in *W_PTR and its height in *H_PTR,
   if these pointers are not null.  */

static int
load_pixmap (FRAME_PTR f, Lisp_Object name, unsigned int *w_ptr, unsigned int *h_ptr)
{
  int bitmap_id;

  if (NILP (name))
    return 0;

  CHECK_TYPE (!NILP (Fbitmap_spec_p (name)), Qbitmap_spec_p, name);

  BLOCK_INPUT;
  if (CONSP (name))
    {
      /* Decode a bitmap spec into a bitmap.  */

      int h, w;
      Lisp_Object bits;

      w = XINT (Fcar (name));
      h = XINT (Fcar (Fcdr (name)));
      bits = Fcar (Fcdr (Fcdr (name)));

      bitmap_id = x_create_bitmap_from_data (f, SDATA (bits),
					     w, h);
    }
  else
    {
      /* It must be a string -- a file name.  */
      bitmap_id = x_create_bitmap_from_file (f, name);
    }
  UNBLOCK_INPUT;

  if (bitmap_id < 0)
    {
      add_to_log ("Invalid or undefined bitmap `%s'", name, Qnil);
      bitmap_id = 0;

      if (w_ptr)
	*w_ptr = 0;
      if (h_ptr)
	*h_ptr = 0;
    }
  else
    {
#if GLYPH_DEBUG
      ++npixmaps_allocated;
#endif
      if (w_ptr)
	*w_ptr = x_bitmap_width (f, bitmap_id);

      if (h_ptr)
	*h_ptr = x_bitmap_height (f, bitmap_id);
    }

  return bitmap_id;
}

#endif /* HAVE_WINDOW_SYSTEM */



/***********************************************************************
				X Colors
 ***********************************************************************/

/* Parse RGB_LIST, and fill in the RGB fields of COLOR.
   RGB_LIST should contain (at least) 3 lisp integers.
   Return 0 if there's a problem with RGB_LIST, otherwise return 1.  */

static int
parse_rgb_list (Lisp_Object rgb_list, XColor *color)
{
#define PARSE_RGB_LIST_FIELD(field)					\
  if (CONSP (rgb_list) && INTEGERP (XCAR (rgb_list)))			\
    {									\
      color->field = XINT (XCAR (rgb_list));				\
      rgb_list = XCDR (rgb_list);					\
    }									\
  else									\
    return 0;

  PARSE_RGB_LIST_FIELD (red);
  PARSE_RGB_LIST_FIELD (green);
  PARSE_RGB_LIST_FIELD (blue);

  return 1;
}


/* Lookup on frame F the color described by the lisp string COLOR.
   The resulting tty color is returned in TTY_COLOR; if STD_COLOR is
   non-zero, then the `standard' definition of the same color is
   returned in it.  */

static int
tty_lookup_color (struct frame *f, Lisp_Object color, XColor *tty_color, XColor *std_color)
{
  Lisp_Object frame, color_desc;

  if (!STRINGP (color) || NILP (Ffboundp (Qtty_color_desc)))
    return 0;

  XSETFRAME (frame, f);

  color_desc = call2 (Qtty_color_desc, color, frame);
  if (CONSP (color_desc) && CONSP (XCDR (color_desc)))
    {
      Lisp_Object rgb;

      if (! INTEGERP (XCAR (XCDR (color_desc))))
	return 0;

      tty_color->pixel = XINT (XCAR (XCDR (color_desc)));

      rgb = XCDR (XCDR (color_desc));
      if (! parse_rgb_list (rgb, tty_color))
	return 0;

      /* Should we fill in STD_COLOR too?  */
      if (std_color)
	{
	  /* Default STD_COLOR to the same as TTY_COLOR.  */
	  *std_color = *tty_color;

	  /* Do a quick check to see if the returned descriptor is
	     actually _exactly_ equal to COLOR, otherwise we have to
	     lookup STD_COLOR separately.  If it's impossible to lookup
	     a standard color, we just give up and use TTY_COLOR.  */
	  if ((!STRINGP (XCAR (color_desc))
	       || NILP (Fstring_equal (color, XCAR (color_desc))))
	      && !NILP (Ffboundp (Qtty_color_standard_values)))
	    {
	      /* Look up STD_COLOR separately.  */
	      rgb = call1 (Qtty_color_standard_values, color);
	      if (! parse_rgb_list (rgb, std_color))
		return 0;
	    }
	}

      return 1;
    }
  else if (NILP (Fsymbol_value (intern ("tty-defined-color-alist"))))
    /* We were called early during startup, and the colors are not
       yet set up in tty-defined-color-alist.  Don't return a failure
       indication, since this produces the annoying "Unable to
       load color" messages in the *Messages* buffer.  */
    return 1;
  else
    /* tty-color-desc seems to have returned a bad value.  */
    return 0;
}

/* A version of defined_color for non-X frames.  */

int
tty_defined_color (struct frame *f, const char *color_name,
		   XColor *color_def, int alloc)
{
  int status = 1;

  /* Defaults.  */
  color_def->pixel = FACE_TTY_DEFAULT_COLOR;
  color_def->red = 0;
  color_def->blue = 0;
  color_def->green = 0;

  if (*color_name)
    status = tty_lookup_color (f, build_string (color_name), color_def, NULL);

  if (color_def->pixel == FACE_TTY_DEFAULT_COLOR && *color_name)
    {
      if (strcmp (color_name, "unspecified-fg") == 0)
	color_def->pixel = FACE_TTY_DEFAULT_FG_COLOR;
      else if (strcmp (color_name, "unspecified-bg") == 0)
	color_def->pixel = FACE_TTY_DEFAULT_BG_COLOR;
    }

  if (color_def->pixel != FACE_TTY_DEFAULT_COLOR)
    status = 1;

  return status;
}


/* Decide if color named COLOR_NAME is valid for the display
   associated with the frame F; if so, return the rgb values in
   COLOR_DEF.  If ALLOC is nonzero, allocate a new colormap cell.

   This does the right thing for any type of frame.  */

int
defined_color (struct frame *f, const char *color_name, XColor *color_def, int alloc)
{
  if (!FRAME_WINDOW_P (f))
    return tty_defined_color (f, color_name, color_def, alloc);
#ifdef HAVE_X_WINDOWS
  else if (FRAME_X_P (f))
    return x_defined_color (f, color_name, color_def, alloc);
#endif
#ifdef WINDOWSNT
  else if (FRAME_W32_P (f))
    return w32_defined_color (f, color_name, color_def, alloc);
#endif
#ifdef HAVE_NS
  else if (FRAME_NS_P (f))
    return ns_defined_color (f, color_name, color_def, alloc, 1);
#endif
  else
    abort ();
}


/* Given the index IDX of a tty color on frame F, return its name, a
   Lisp string.  */

Lisp_Object
tty_color_name (struct frame *f, int idx)
{
  if (idx >= 0 && !NILP (Ffboundp (Qtty_color_by_index)))
    {
      Lisp_Object frame;
      Lisp_Object coldesc;

      XSETFRAME (frame, f);
      coldesc = call2 (Qtty_color_by_index, make_number (idx), frame);

      if (!NILP (coldesc))
	return XCAR (coldesc);
    }
#ifdef MSDOS
  /* We can have an MSDOG frame under -nw for a short window of
     opportunity before internal_terminal_init is called.  DTRT.  */
  if (FRAME_MSDOS_P (f) && !inhibit_window_system)
    return msdos_stdcolor_name (idx);
#endif

  if (idx == FACE_TTY_DEFAULT_FG_COLOR)
    return build_string (unspecified_fg);
  if (idx == FACE_TTY_DEFAULT_BG_COLOR)
    return build_string (unspecified_bg);

  return Qunspecified;
}


/* Return non-zero if COLOR_NAME is a shade of gray (or white or
   black) on frame F.

   The criterion implemented here is not a terribly sophisticated one.  */

static int
face_color_gray_p (struct frame *f, const char *color_name)
{
  XColor color;
  int gray_p;

  if (defined_color (f, color_name, &color, 0))
    gray_p = (/* Any color sufficiently close to black counts as grey.  */
	      (color.red < 5000 && color.green < 5000 && color.blue < 5000)
	      ||
	      ((eabs (color.red - color.green)
		< max (color.red, color.green) / 20)
	       && (eabs (color.green - color.blue)
		   < max (color.green, color.blue) / 20)
	       && (eabs (color.blue - color.red)
		   < max (color.blue, color.red) / 20)));
  else
    gray_p = 0;

  return gray_p;
}


/* Return non-zero if color COLOR_NAME can be displayed on frame F.
   BACKGROUND_P non-zero means the color will be used as background
   color.  */

static int
face_color_supported_p (struct frame *f, const char *color_name, int background_p)
{
  Lisp_Object frame;
  XColor not_used;

  XSETFRAME (frame, f);
  return
#ifdef HAVE_WINDOW_SYSTEM
    FRAME_WINDOW_P (f)
    ? (!NILP (Fxw_display_color_p (frame))
       || xstrcasecmp (color_name, "black") == 0
       || xstrcasecmp (color_name, "white") == 0
       || (background_p
	   && face_color_gray_p (f, color_name))
       || (!NILP (Fx_display_grayscale_p (frame))
	   && face_color_gray_p (f, color_name)))
    :
#endif
    tty_defined_color (f, color_name, &not_used, 0);
}


DEFUN ("color-gray-p", Fcolor_gray_p, Scolor_gray_p, 1, 2, 0,
       doc: /* Return non-nil if COLOR is a shade of gray (or white or black).
FRAME specifies the frame and thus the display for interpreting COLOR.
If FRAME is nil or omitted, use the selected frame.  */)
  (Lisp_Object color, Lisp_Object frame)
{
  struct frame *f;

  CHECK_STRING (color);
  if (NILP (frame))
    frame = selected_frame;
  else
    CHECK_FRAME (frame);
  f = XFRAME (frame);
  return face_color_gray_p (f, SDATA (color)) ? Qt : Qnil;
}


DEFUN ("color-supported-p", Fcolor_supported_p,
       Scolor_supported_p, 1, 3, 0,
       doc: /* Return non-nil if COLOR can be displayed on FRAME.
BACKGROUND-P non-nil means COLOR is used as a background.
Otherwise, this function tells whether it can be used as a foreground.
If FRAME is nil or omitted, use the selected frame.
COLOR must be a valid color name.  */)
  (Lisp_Object color, Lisp_Object frame, Lisp_Object background_p)
{
  struct frame *f;

  CHECK_STRING (color);
  if (NILP (frame))
    frame = selected_frame;
  else
    CHECK_FRAME (frame);
  f = XFRAME (frame);
  if (face_color_supported_p (f, SDATA (color), !NILP (background_p)))
    return Qt;
  return Qnil;
}


/* Load color with name NAME for use by face FACE on frame F.
   TARGET_INDEX must be one of LFACE_FOREGROUND_INDEX,
   LFACE_BACKGROUND_INDEX, LFACE_UNDERLINE_INDEX, LFACE_OVERLINE_INDEX,
   LFACE_STRIKE_THROUGH_INDEX, or LFACE_BOX_INDEX.  Value is the
   pixel color.  If color cannot be loaded, display a message, and
   return the foreground, background or underline color of F, but
   record that fact in flags of the face so that we don't try to free
   these colors.  */

unsigned long
load_color (struct frame *f, struct face *face, Lisp_Object name, enum lface_attribute_index target_index)
{
  XColor color;

  xassert (STRINGP (name));
  xassert (target_index == LFACE_FOREGROUND_INDEX
	   || target_index == LFACE_BACKGROUND_INDEX
	   || target_index == LFACE_UNDERLINE_INDEX
	   || target_index == LFACE_OVERLINE_INDEX
	   || target_index == LFACE_STRIKE_THROUGH_INDEX
	   || target_index == LFACE_BOX_INDEX);

  /* if the color map is full, defined_color will return a best match
     to the values in an existing cell. */
  if (!defined_color (f, SDATA (name), &color, 1))
    {
      add_to_log ("Unable to load color \"%s\"", name, Qnil);

      switch (target_index)
	{
	case LFACE_FOREGROUND_INDEX:
	  face->foreground_defaulted_p = 1;
	  color.pixel = FRAME_FOREGROUND_PIXEL (f);
	  break;

	case LFACE_BACKGROUND_INDEX:
	  face->background_defaulted_p = 1;
	  color.pixel = FRAME_BACKGROUND_PIXEL (f);
	  break;

	case LFACE_UNDERLINE_INDEX:
	  face->underline_defaulted_p = 1;
	  color.pixel = FRAME_FOREGROUND_PIXEL (f);
	  break;

	case LFACE_OVERLINE_INDEX:
	  face->overline_color_defaulted_p = 1;
	  color.pixel = FRAME_FOREGROUND_PIXEL (f);
	  break;

	case LFACE_STRIKE_THROUGH_INDEX:
	  face->strike_through_color_defaulted_p = 1;
	  color.pixel = FRAME_FOREGROUND_PIXEL (f);
	  break;

	case LFACE_BOX_INDEX:
	  face->box_color_defaulted_p = 1;
	  color.pixel = FRAME_FOREGROUND_PIXEL (f);
	  break;

	default:
	  abort ();
	}
    }
#if GLYPH_DEBUG
  else
    ++ncolors_allocated;
#endif

  return color.pixel;
}


#ifdef HAVE_WINDOW_SYSTEM

/* Load colors for face FACE which is used on frame F.  Colors are
   specified by slots LFACE_BACKGROUND_INDEX and LFACE_FOREGROUND_INDEX
   of ATTRS.  If the background color specified is not supported on F,
   try to emulate gray colors with a stipple from Vface_default_stipple.  */

static void
load_face_colors (struct frame *f, struct face *face, Lisp_Object *attrs)
{
  Lisp_Object fg, bg;

  bg = attrs[LFACE_BACKGROUND_INDEX];
  fg = attrs[LFACE_FOREGROUND_INDEX];

  /* Swap colors if face is inverse-video.  */
  if (EQ (attrs[LFACE_INVERSE_INDEX], Qt))
    {
      Lisp_Object tmp;
      tmp = fg;
      fg = bg;
      bg = tmp;
    }

  /* Check for support for foreground, not for background because
     face_color_supported_p is smart enough to know that grays are
     "supported" as background because we are supposed to use stipple
     for them.  */
  if (!face_color_supported_p (f, SDATA (bg), 0)
      && !NILP (Fbitmap_spec_p (Vface_default_stipple)))
    {
      x_destroy_bitmap (f, face->stipple);
      face->stipple = load_pixmap (f, Vface_default_stipple,
				   &face->pixmap_w, &face->pixmap_h);
    }

  face->background = load_color (f, face, bg, LFACE_BACKGROUND_INDEX);
  face->foreground = load_color (f, face, fg, LFACE_FOREGROUND_INDEX);
}


/* Free color PIXEL on frame F.  */

void
unload_color (struct frame *f, long unsigned int pixel)
{
#ifdef HAVE_X_WINDOWS
  if (pixel != -1)
    {
      BLOCK_INPUT;
      x_free_colors (f, &pixel, 1);
      UNBLOCK_INPUT;
    }
#endif
}


/* Free colors allocated for FACE.  */

static void
free_face_colors (struct frame *f, struct face *face)
{
/* PENDING(NS): need to do something here? */
#ifdef HAVE_X_WINDOWS
  if (face->colors_copied_bitwise_p)
    return;

  BLOCK_INPUT;

  if (!face->foreground_defaulted_p)
    {
      x_free_colors (f, &face->foreground, 1);
      IF_DEBUG (--ncolors_allocated);
    }

  if (!face->background_defaulted_p)
    {
      x_free_colors (f, &face->background, 1);
      IF_DEBUG (--ncolors_allocated);
    }

  if (face->underline_p
      && !face->underline_defaulted_p)
    {
      x_free_colors (f, &face->underline_color, 1);
      IF_DEBUG (--ncolors_allocated);
    }

  if (face->overline_p
      && !face->overline_color_defaulted_p)
    {
      x_free_colors (f, &face->overline_color, 1);
      IF_DEBUG (--ncolors_allocated);
    }

  if (face->strike_through_p
      && !face->strike_through_color_defaulted_p)
    {
      x_free_colors (f, &face->strike_through_color, 1);
      IF_DEBUG (--ncolors_allocated);
    }

  if (face->box != FACE_NO_BOX
      && !face->box_color_defaulted_p)
    {
      x_free_colors (f, &face->box_color, 1);
      IF_DEBUG (--ncolors_allocated);
    }

  UNBLOCK_INPUT;
#endif /* HAVE_X_WINDOWS */
}

#endif /* HAVE_WINDOW_SYSTEM */



/***********************************************************************
			   XLFD Font Names
 ***********************************************************************/

/* An enumerator for each field of an XLFD font name.  */

enum xlfd_field
{
  XLFD_FOUNDRY,
  XLFD_FAMILY,
  XLFD_WEIGHT,
  XLFD_SLANT,
  XLFD_SWIDTH,
  XLFD_ADSTYLE,
  XLFD_PIXEL_SIZE,
  XLFD_POINT_SIZE,
  XLFD_RESX,
  XLFD_RESY,
  XLFD_SPACING,
  XLFD_AVGWIDTH,
  XLFD_REGISTRY,
  XLFD_ENCODING,
  XLFD_LAST
};

/* An enumerator for each possible slant value of a font.  Taken from
   the XLFD specification.  */

enum xlfd_slant
{
  XLFD_SLANT_UNKNOWN,
  XLFD_SLANT_ROMAN,
  XLFD_SLANT_ITALIC,
  XLFD_SLANT_OBLIQUE,
  XLFD_SLANT_REVERSE_ITALIC,
  XLFD_SLANT_REVERSE_OBLIQUE,
  XLFD_SLANT_OTHER
};

/* Relative font weight according to XLFD documentation.  */

enum xlfd_weight
{
  XLFD_WEIGHT_UNKNOWN,
  XLFD_WEIGHT_ULTRA_LIGHT,	/* 10 */
  XLFD_WEIGHT_EXTRA_LIGHT,	/* 20 */
  XLFD_WEIGHT_LIGHT,		/* 30 */
  XLFD_WEIGHT_SEMI_LIGHT,	/* 40: SemiLight, Book, ...  */
  XLFD_WEIGHT_MEDIUM,		/* 50: Medium, Normal, Regular, ...  */
  XLFD_WEIGHT_SEMI_BOLD,	/* 60: SemiBold, DemiBold, ...  */
  XLFD_WEIGHT_BOLD,		/* 70: Bold, ... */
  XLFD_WEIGHT_EXTRA_BOLD,	/* 80: ExtraBold, Heavy, ...  */
  XLFD_WEIGHT_ULTRA_BOLD	/* 90: UltraBold, Black, ...  */
};

/* Relative proportionate width.  */

enum xlfd_swidth
{
  XLFD_SWIDTH_UNKNOWN,
  XLFD_SWIDTH_ULTRA_CONDENSED,	/* 10 */
  XLFD_SWIDTH_EXTRA_CONDENSED,	/* 20 */
  XLFD_SWIDTH_CONDENSED,	/* 30: Condensed, Narrow, Compressed, ... */
  XLFD_SWIDTH_SEMI_CONDENSED,	/* 40: semicondensed */
  XLFD_SWIDTH_MEDIUM,		/* 50: Medium, Normal, Regular, ... */
  XLFD_SWIDTH_SEMI_EXPANDED,	/* 60: SemiExpanded, DemiExpanded, ... */
  XLFD_SWIDTH_EXPANDED,		/* 70: Expanded... */
  XLFD_SWIDTH_EXTRA_EXPANDED,	/* 80: ExtraExpanded, Wide...  */
  XLFD_SWIDTH_ULTRA_EXPANDED	/* 90: UltraExpanded... */
};

/* Order by which font selection chooses fonts.  The default values
   mean `first, find a best match for the font width, then for the
   font height, then for weight, then for slant.'  This variable can be
   set via set-face-font-sort-order.  */

static int font_sort_order[4];

#ifdef HAVE_WINDOW_SYSTEM

static enum font_property_index font_props_for_sorting[FONT_SIZE_INDEX];

static int
compare_fonts_by_sort_order (const void *v1, const void *v2)
{
  Lisp_Object font1 = *(Lisp_Object *) v1;
  Lisp_Object font2 = *(Lisp_Object *) v2;
  int i;

  for (i = 0; i < FONT_SIZE_INDEX; i++)
    {
      enum font_property_index idx = font_props_for_sorting[i];
      Lisp_Object val1 = AREF (font1, idx), val2 = AREF (font2, idx);
      int result;

      if (idx <= FONT_REGISTRY_INDEX)
	{
	  if (STRINGP (val1))
	    result = STRINGP (val2) ? strcmp (SDATA (val1), SDATA (val2)) : -1;
	  else
	    result = STRINGP (val2) ? 1 : 0;
	}
      else
	{
	  if (INTEGERP (val1))
	    result = INTEGERP (val2) ? XINT (val1) - XINT (val2) : -1;
	  else
	    result = INTEGERP (val2) ? 1 : 0;
	}
      if (result)
	return result;
    }
  return 0;
}

DEFUN ("x-family-fonts", Fx_family_fonts, Sx_family_fonts, 0, 2, 0,
       doc: /* Return a list of available fonts of family FAMILY on FRAME.
If FAMILY is omitted or nil, list all families.
Otherwise, FAMILY must be a string, possibly containing wildcards
`?' and `*'.
If FRAME is omitted or nil, use the selected frame.
Each element of the result is a vector [FAMILY WIDTH POINT-SIZE WEIGHT
SLANT FIXED-P FULL REGISTRY-AND-ENCODING].
FAMILY is the font family name.  POINT-SIZE is the size of the
font in 1/10 pt.  WIDTH, WEIGHT, and SLANT are symbols describing the
width, weight and slant of the font.  These symbols are the same as for
face attributes.  FIXED-P is non-nil if the font is fixed-pitch.
FULL is the full name of the font, and REGISTRY-AND-ENCODING is a string
giving the registry and encoding of the font.
The result list is sorted according to the current setting of
the face font sort order.  */)
  (Lisp_Object family, Lisp_Object frame)
{
  Lisp_Object font_spec, list, *drivers, vec;
  int i, nfonts, ndrivers;
  Lisp_Object result;

  if (NILP (frame))
    frame = selected_frame;
  CHECK_LIVE_FRAME (frame);

  font_spec = Ffont_spec (0, NULL);
  if (!NILP (family))
    {
      CHECK_STRING (family);
      font_parse_family_registry (family, Qnil, font_spec);
    }

  list = font_list_entities (frame, font_spec);
  if (NILP (list))
    return Qnil;

  /* Sort the font entities.  */
  for (i = 0; i < 4; i++)
    switch (font_sort_order[i])
      {
      case XLFD_SWIDTH:
	font_props_for_sorting[i] = FONT_WIDTH_INDEX; break;
      case XLFD_POINT_SIZE:
	font_props_for_sorting[i] = FONT_SIZE_INDEX; break;
      case XLFD_WEIGHT:
	font_props_for_sorting[i] = FONT_WEIGHT_INDEX; break;
      default:
	font_props_for_sorting[i] = FONT_SLANT_INDEX; break;
      }
  font_props_for_sorting[i++] = FONT_FAMILY_INDEX;
  font_props_for_sorting[i++] = FONT_FOUNDRY_INDEX;
  font_props_for_sorting[i++] = FONT_ADSTYLE_INDEX;
  font_props_for_sorting[i++] = FONT_REGISTRY_INDEX;

  ndrivers = XINT (Flength (list));
  drivers  = alloca (sizeof (Lisp_Object) * ndrivers);
  for (i = 0; i < ndrivers; i++, list = XCDR (list))
    drivers[i] = XCAR (list);
  vec = Fvconcat (ndrivers, drivers);
  nfonts = ASIZE (vec);

  qsort (XVECTOR (vec)->contents, nfonts, sizeof (Lisp_Object),
	 compare_fonts_by_sort_order);

  result = Qnil;
  for (i = nfonts - 1; i >= 0; --i)
    {
      Lisp_Object font = AREF (vec, i);
      Lisp_Object v = Fmake_vector (make_number (8), Qnil);
      int point;
      Lisp_Object spacing;

      ASET (v, 0, AREF (font, FONT_FAMILY_INDEX));
      ASET (v, 1, FONT_WIDTH_SYMBOLIC (font));
      point = PIXEL_TO_POINT (XINT (AREF (font, FONT_SIZE_INDEX)) * 10,
			      XFRAME (frame)->resy);
      ASET (v, 2, make_number (point));
      ASET (v, 3, FONT_WEIGHT_SYMBOLIC (font));
      ASET (v, 4, FONT_SLANT_SYMBOLIC (font));
      spacing = Ffont_get (font, QCspacing);
      ASET (v, 5, (NILP (spacing) || EQ (spacing, Qp)) ? Qnil : Qt);
      ASET (v, 6, Ffont_xlfd_name (font, Qnil));
      ASET (v, 7, AREF (font, FONT_REGISTRY_INDEX));

      result = Fcons (v, result);
    }

  return result;
}

DEFUN ("x-list-fonts", Fx_list_fonts, Sx_list_fonts, 1, 5, 0,
       doc: /* Return a list of the names of available fonts matching PATTERN.
If optional arguments FACE and FRAME are specified, return only fonts
the same size as FACE on FRAME.

PATTERN should be a string containing a font name in the XLFD,
Fontconfig, or GTK format.  A font name given in the XLFD format may
contain wildcard characters:
  the * character matches any substring, and
  the ? character matches any single character.
  PATTERN is case-insensitive.

The return value is a list of strings, suitable as arguments to
`set-face-font'.

Fonts Emacs can't use may or may not be excluded
even if they match PATTERN and FACE.
The optional fourth argument MAXIMUM sets a limit on how many
fonts to match.  The first MAXIMUM fonts are reported.
The optional fifth argument WIDTH, if specified, is a number of columns
occupied by a character of a font.  In that case, return only fonts
the WIDTH times as wide as FACE on FRAME.  */)
  (Lisp_Object pattern, Lisp_Object face, Lisp_Object frame, Lisp_Object maximum, Lisp_Object width)
{
  struct frame *f;
  int size, avgwidth;

  check_x ();
  CHECK_STRING (pattern);

  if (! NILP (maximum))
    CHECK_NATNUM (maximum);

  if (!NILP (width))
    CHECK_NUMBER (width);

  /* We can't simply call check_x_frame because this function may be
     called before any frame is created.  */
  if (NILP (frame))
    frame = selected_frame;
  f = frame_or_selected_frame (frame, 2);
  if (! FRAME_WINDOW_P (f))
    {
      /* Perhaps we have not yet created any frame.  */
      f = NULL;
      frame = Qnil;
      face = Qnil;
    }

  /* Determine the width standard for comparison with the fonts we find.  */

  if (NILP (face))
    size = 0;
  else
    {
      /* This is of limited utility since it works with character
	 widths.  Keep it for compatibility.  --gerd.  */
      int face_id = lookup_named_face (f, face, 0);
      struct face *face = (face_id < 0
			   ? NULL
			   : FACE_FROM_ID (f, face_id));

      if (face && face->font)
	{
	  size = face->font->pixel_size;
	  avgwidth = face->font->average_width;
	}
      else
	{
	  size = FRAME_FONT (f)->pixel_size;
	  avgwidth = FRAME_FONT (f)->average_width;
	}
      if (!NILP (width))
	avgwidth *= XINT (width);
    }

  {
    Lisp_Object font_spec;
    Lisp_Object args[2], tail;

    font_spec = font_spec_from_name (pattern);
    if (!FONTP (font_spec))
      signal_error ("Invalid font name", pattern);

    if (size)
      {
	Ffont_put (font_spec, QCsize, make_number (size));
	Ffont_put (font_spec, QCavgwidth, make_number (avgwidth));
      }
    args[0] = Flist_fonts (font_spec, frame, maximum, font_spec);
    for (tail = args[0]; CONSP (tail); tail = XCDR (tail))
      {
	Lisp_Object font_entity;

	font_entity = XCAR (tail);
	if ((NILP (AREF (font_entity, FONT_SIZE_INDEX))
	     || XINT (AREF (font_entity, FONT_SIZE_INDEX)) == 0)
	    && ! NILP (AREF (font_spec, FONT_SIZE_INDEX)))
	  {
	    /* This is a scalable font.  For backward compatibility,
	       we set the specified size. */
	    font_entity = Fcopy_font_spec (font_entity);
	    ASET (font_entity, FONT_SIZE_INDEX,
		  AREF (font_spec, FONT_SIZE_INDEX));
	  }
	XSETCAR (tail, Ffont_xlfd_name (font_entity, Qnil));
      }
    if (NILP (frame))
      /* We don't have to check fontsets.  */
      return args[0];
    args[1] = list_fontsets (f, pattern, size);
    return Fnconc (2, args);
  }
}

#endif /* HAVE_WINDOW_SYSTEM */


/***********************************************************************
			      Lisp Faces
 ***********************************************************************/

/* Access face attributes of face LFACE, a Lisp vector.  */

#define LFACE_FAMILY(LFACE)	    AREF ((LFACE), LFACE_FAMILY_INDEX)
#define LFACE_FOUNDRY(LFACE)	    AREF ((LFACE), LFACE_FOUNDRY_INDEX)
#define LFACE_HEIGHT(LFACE)	    AREF ((LFACE), LFACE_HEIGHT_INDEX)
#define LFACE_WEIGHT(LFACE)	    AREF ((LFACE), LFACE_WEIGHT_INDEX)
#define LFACE_SLANT(LFACE)	    AREF ((LFACE), LFACE_SLANT_INDEX)
#define LFACE_UNDERLINE(LFACE)      AREF ((LFACE), LFACE_UNDERLINE_INDEX)
#define LFACE_INVERSE(LFACE)	    AREF ((LFACE), LFACE_INVERSE_INDEX)
#define LFACE_FOREGROUND(LFACE)     AREF ((LFACE), LFACE_FOREGROUND_INDEX)
#define LFACE_BACKGROUND(LFACE)     AREF ((LFACE), LFACE_BACKGROUND_INDEX)
#define LFACE_STIPPLE(LFACE)	    AREF ((LFACE), LFACE_STIPPLE_INDEX)
#define LFACE_SWIDTH(LFACE)	    AREF ((LFACE), LFACE_SWIDTH_INDEX)
#define LFACE_OVERLINE(LFACE)	    AREF ((LFACE), LFACE_OVERLINE_INDEX)
#define LFACE_STRIKE_THROUGH(LFACE) AREF ((LFACE), LFACE_STRIKE_THROUGH_INDEX)
#define LFACE_BOX(LFACE)	    AREF ((LFACE), LFACE_BOX_INDEX)
#define LFACE_FONT(LFACE)	    AREF ((LFACE), LFACE_FONT_INDEX)
#define LFACE_INHERIT(LFACE)	    AREF ((LFACE), LFACE_INHERIT_INDEX)
#define LFACE_FONTSET(LFACE)	    AREF ((LFACE), LFACE_FONTSET_INDEX)

/* Non-zero if LFACE is a Lisp face.  A Lisp face is a vector of size
   LFACE_VECTOR_SIZE which has the symbol `face' in slot 0.  */

#define LFACEP(LFACE)					\
     (VECTORP (LFACE)					\
      && XVECTOR (LFACE)->size == LFACE_VECTOR_SIZE	\
      && EQ (AREF (LFACE, 0), Qface))


#if GLYPH_DEBUG

/* Check consistency of Lisp face attribute vector ATTRS.  */

static void
check_lface_attrs (attrs)
     Lisp_Object *attrs;
{
  xassert (UNSPECIFIEDP (attrs[LFACE_FAMILY_INDEX])
	   || IGNORE_DEFFACE_P (attrs[LFACE_FAMILY_INDEX])
	   || STRINGP (attrs[LFACE_FAMILY_INDEX]));
  xassert (UNSPECIFIEDP (attrs[LFACE_FOUNDRY_INDEX])
	   || IGNORE_DEFFACE_P (attrs[LFACE_FOUNDRY_INDEX])
	   || STRINGP (attrs[LFACE_FOUNDRY_INDEX]));
  xassert (UNSPECIFIEDP (attrs[LFACE_SWIDTH_INDEX])
	   || IGNORE_DEFFACE_P (attrs[LFACE_SWIDTH_INDEX])
	   || SYMBOLP (attrs[LFACE_SWIDTH_INDEX]));
  xassert (UNSPECIFIEDP (attrs[LFACE_HEIGHT_INDEX])
	   || IGNORE_DEFFACE_P (attrs[LFACE_HEIGHT_INDEX])
	   || INTEGERP (attrs[LFACE_HEIGHT_INDEX])
	   || FLOATP (attrs[LFACE_HEIGHT_INDEX])
	   || FUNCTIONP (attrs[LFACE_HEIGHT_INDEX]));
  xassert (UNSPECIFIEDP (attrs[LFACE_WEIGHT_INDEX])
	   || IGNORE_DEFFACE_P (attrs[LFACE_WEIGHT_INDEX])
	   || SYMBOLP (attrs[LFACE_WEIGHT_INDEX]));
  xassert (UNSPECIFIEDP (attrs[LFACE_SLANT_INDEX])
	   || IGNORE_DEFFACE_P (attrs[LFACE_SLANT_INDEX])
	   || SYMBOLP (attrs[LFACE_SLANT_INDEX]));
  xassert (UNSPECIFIEDP (attrs[LFACE_UNDERLINE_INDEX])
	   || IGNORE_DEFFACE_P (attrs[LFACE_UNDERLINE_INDEX])
	   || SYMBOLP (attrs[LFACE_UNDERLINE_INDEX])
	   || STRINGP (attrs[LFACE_UNDERLINE_INDEX]));
  xassert (UNSPECIFIEDP (attrs[LFACE_OVERLINE_INDEX])
	   || IGNORE_DEFFACE_P (attrs[LFACE_OVERLINE_INDEX])
	   || SYMBOLP (attrs[LFACE_OVERLINE_INDEX])
	   || STRINGP (attrs[LFACE_OVERLINE_INDEX]));
  xassert (UNSPECIFIEDP (attrs[LFACE_STRIKE_THROUGH_INDEX])
	   || IGNORE_DEFFACE_P (attrs[LFACE_STRIKE_THROUGH_INDEX])
	   || SYMBOLP (attrs[LFACE_STRIKE_THROUGH_INDEX])
	   || STRINGP (attrs[LFACE_STRIKE_THROUGH_INDEX]));
  xassert (UNSPECIFIEDP (attrs[LFACE_BOX_INDEX])
	   || IGNORE_DEFFACE_P (attrs[LFACE_BOX_INDEX])
	   || SYMBOLP (attrs[LFACE_BOX_INDEX])
	   || STRINGP (attrs[LFACE_BOX_INDEX])
	   || INTEGERP (attrs[LFACE_BOX_INDEX])
	   || CONSP (attrs[LFACE_BOX_INDEX]));
  xassert (UNSPECIFIEDP (attrs[LFACE_INVERSE_INDEX])
	   || IGNORE_DEFFACE_P (attrs[LFACE_INVERSE_INDEX])
	   || SYMBOLP (attrs[LFACE_INVERSE_INDEX]));
  xassert (UNSPECIFIEDP (attrs[LFACE_FOREGROUND_INDEX])
	   || IGNORE_DEFFACE_P (attrs[LFACE_FOREGROUND_INDEX])
	   || STRINGP (attrs[LFACE_FOREGROUND_INDEX]));
  xassert (UNSPECIFIEDP (attrs[LFACE_BACKGROUND_INDEX])
	   || IGNORE_DEFFACE_P (attrs[LFACE_BACKGROUND_INDEX])
	   || STRINGP (attrs[LFACE_BACKGROUND_INDEX]));
  xassert (UNSPECIFIEDP (attrs[LFACE_INHERIT_INDEX])
	   || IGNORE_DEFFACE_P (attrs[LFACE_INHERIT_INDEX])
	   || NILP (attrs[LFACE_INHERIT_INDEX])
	   || SYMBOLP (attrs[LFACE_INHERIT_INDEX])
	   || CONSP (attrs[LFACE_INHERIT_INDEX]));
#ifdef HAVE_WINDOW_SYSTEM
  xassert (UNSPECIFIEDP (attrs[LFACE_STIPPLE_INDEX])
	   || IGNORE_DEFFACE_P (attrs[LFACE_STIPPLE_INDEX])
	   || SYMBOLP (attrs[LFACE_STIPPLE_INDEX])
	   || !NILP (Fbitmap_spec_p (attrs[LFACE_STIPPLE_INDEX])));
  xassert (UNSPECIFIEDP (attrs[LFACE_FONT_INDEX])
	   || IGNORE_DEFFACE_P (attrs[LFACE_FONT_INDEX])
	   || FONTP (attrs[LFACE_FONT_INDEX]));
  xassert (UNSPECIFIEDP (attrs[LFACE_FONTSET_INDEX])
	   || STRINGP (attrs[LFACE_FONTSET_INDEX]));
#endif
}


/* Check consistency of attributes of Lisp face LFACE (a Lisp vector).  */

static void
check_lface (lface)
     Lisp_Object lface;
{
  if (!NILP (lface))
    {
      xassert (LFACEP (lface));
      check_lface_attrs (XVECTOR (lface)->contents);
    }
}

#else /* GLYPH_DEBUG == 0 */

#define check_lface_attrs(attrs)	(void) 0
#define check_lface(lface)		(void) 0

#endif /* GLYPH_DEBUG == 0 */



/* Face-merge cycle checking.  */

enum named_merge_point_kind
{
  NAMED_MERGE_POINT_NORMAL,
  NAMED_MERGE_POINT_REMAP
};

/* A `named merge point' is simply a point during face-merging where we
   look up a face by name.  We keep a stack of which named lookups we're
   currently processing so that we can easily detect cycles, using a
   linked- list of struct named_merge_point structures, typically
   allocated on the stack frame of the named lookup functions which are
   active (so no consing is required).  */
struct named_merge_point
{
  Lisp_Object face_name;
  enum named_merge_point_kind named_merge_point_kind;
  struct named_merge_point *prev;
};


/* If a face merging cycle is detected for FACE_NAME, return 0,
   otherwise add NEW_NAMED_MERGE_POINT, which is initialized using
   FACE_NAME and NAMED_MERGE_POINT_KIND, as the head of the linked list
   pointed to by NAMED_MERGE_POINTS, and return 1.  */

static INLINE int
push_named_merge_point (struct named_merge_point *new_named_merge_point,
			Lisp_Object face_name,
			enum named_merge_point_kind named_merge_point_kind,
			struct named_merge_point **named_merge_points)
{
  struct named_merge_point *prev;

  for (prev = *named_merge_points; prev; prev = prev->prev)
    if (EQ (face_name, prev->face_name))
      {
	if (prev->named_merge_point_kind == named_merge_point_kind)
	  /* A cycle, so fail.  */
	  return 0;
	else if (prev->named_merge_point_kind == NAMED_MERGE_POINT_REMAP)
	  /* A remap `hides ' any previous normal merge points
	     (because the remap means that it's actually different face),
	     so as we know the current merge point must be normal, we
	     can just assume it's OK.  */
	  break;
      }

  new_named_merge_point->face_name = face_name;
  new_named_merge_point->named_merge_point_kind = named_merge_point_kind;
  new_named_merge_point->prev = *named_merge_points;

  *named_merge_points = new_named_merge_point;

  return 1;
}



#if 0				/* Seems to be unused.  */
static Lisp_Object
internal_resolve_face_name (nargs, args)
     int nargs;
     Lisp_Object *args;
{
  return Fget (args[0], args[1]);
}

static Lisp_Object
resolve_face_name_error (ignore)
     Lisp_Object ignore;
{
  return Qnil;
}
#endif

/* Resolve face name FACE_NAME.  If FACE_NAME is a string, intern it
   to make it a symbol.  If FACE_NAME is an alias for another face,
   return that face's name.

   Return default face in case of errors.  */

static Lisp_Object
resolve_face_name (Lisp_Object face_name, int signal_p)
{
  Lisp_Object orig_face;
  Lisp_Object tortoise, hare;

  if (STRINGP (face_name))
    face_name = intern (SDATA (face_name));

  if (NILP (face_name) || !SYMBOLP (face_name))
    return face_name;

  orig_face = face_name;
  tortoise = hare = face_name;

  while (1)
    {
      face_name = hare;
      hare = Fget (hare, Qface_alias);
      if (NILP (hare) || !SYMBOLP (hare))
	break;

      face_name = hare;
      hare = Fget (hare, Qface_alias);
      if (NILP (hare) || !SYMBOLP (hare))
	break;

      tortoise = Fget (tortoise, Qface_alias);
      if (EQ (hare, tortoise))
	{
	  if (signal_p)
	    xsignal1 (Qcircular_list, orig_face);
	  return Qdefault;
	}
    }

  return face_name;
}


/* Return the face definition of FACE_NAME on frame F.  F null means
   return the definition for new frames.  FACE_NAME may be a string or
   a symbol (apparently Emacs 20.2 allowed strings as face names in
   face text properties; Ediff uses that).  If SIGNAL_P is non-zero,
   signal an error if FACE_NAME is not a valid face name.  If SIGNAL_P
   is zero, value is nil if FACE_NAME is not a valid face name.  */
static INLINE Lisp_Object
lface_from_face_name_no_resolve (struct frame *f, Lisp_Object face_name, int signal_p)
{
  Lisp_Object lface;

  if (f)
    lface = assq_no_quit (face_name, f->face_alist);
  else
    lface = assq_no_quit (face_name, Vface_new_frame_defaults);

  if (CONSP (lface))
    lface = XCDR (lface);
  else if (signal_p)
    signal_error ("Invalid face", face_name);

  check_lface (lface);

  return lface;
}

/* Return the face definition of FACE_NAME on frame F.  F null means
   return the definition for new frames.  FACE_NAME may be a string or
   a symbol (apparently Emacs 20.2 allowed strings as face names in
   face text properties; Ediff uses that).  If FACE_NAME is an alias
   for another face, return that face's definition.  If SIGNAL_P is
   non-zero, signal an error if FACE_NAME is not a valid face name.
   If SIGNAL_P is zero, value is nil if FACE_NAME is not a valid face
   name.  */
static INLINE Lisp_Object
lface_from_face_name (struct frame *f, Lisp_Object face_name, int signal_p)
{
  face_name = resolve_face_name (face_name, signal_p);
  return lface_from_face_name_no_resolve (f, face_name, signal_p);
}


/* Get face attributes of face FACE_NAME from frame-local faces on
   frame F.  Store the resulting attributes in ATTRS which must point
   to a vector of Lisp_Objects of size LFACE_VECTOR_SIZE.  If SIGNAL_P
   is non-zero, signal an error if FACE_NAME does not name a face.
   Otherwise, value is zero if FACE_NAME is not a face.  */

static INLINE int
get_lface_attributes_no_remap (struct frame *f, Lisp_Object face_name, Lisp_Object *attrs, int signal_p)
{
  Lisp_Object lface;

  lface = lface_from_face_name_no_resolve (f, face_name, signal_p);

  if (! NILP (lface))
    memcpy (attrs, XVECTOR (lface)->contents,
	    LFACE_VECTOR_SIZE * sizeof *attrs);

  return !NILP (lface);
}

/* Get face attributes of face FACE_NAME from frame-local faces on frame
   F.  Store the resulting attributes in ATTRS which must point to a
   vector of Lisp_Objects of size LFACE_VECTOR_SIZE.  If FACE_NAME is an
   alias for another face, use that face's definition.  If SIGNAL_P is
   non-zero, signal an error if FACE_NAME does not name a face.
   Otherwise, value is zero if FACE_NAME is not a face.  */

static INLINE int
get_lface_attributes (struct frame *f, Lisp_Object face_name, Lisp_Object *attrs, int signal_p, struct named_merge_point *named_merge_points)
{
  Lisp_Object face_remapping;

  face_name = resolve_face_name (face_name, signal_p);

  /* See if SYMBOL has been remapped to some other face (usually this
     is done buffer-locally).  */
  face_remapping = assq_no_quit (face_name, Vface_remapping_alist);
  if (CONSP (face_remapping))
    {
      struct named_merge_point named_merge_point;

      if (push_named_merge_point (&named_merge_point,
				  face_name, NAMED_MERGE_POINT_REMAP,
				  &named_merge_points))
	{
	  int i;

	  for (i = 1; i < LFACE_VECTOR_SIZE; ++i)
	    attrs[i] = Qunspecified;

	  return merge_face_ref (f, XCDR (face_remapping), attrs,
				 signal_p, named_merge_points);
	}
    }

  /* Default case, no remapping.  */
  return get_lface_attributes_no_remap (f, face_name, attrs, signal_p);
}


/* Non-zero if all attributes in face attribute vector ATTRS are
   specified, i.e. are non-nil.  */

static int
lface_fully_specified_p (Lisp_Object *attrs)
{
  int i;

  for (i = 1; i < LFACE_VECTOR_SIZE; ++i)
    if (i != LFACE_FONT_INDEX && i != LFACE_INHERIT_INDEX)
      if ((UNSPECIFIEDP (attrs[i]) || IGNORE_DEFFACE_P (attrs[i])))
        break;

  return i == LFACE_VECTOR_SIZE;
}

#ifdef HAVE_WINDOW_SYSTEM

/* Set font-related attributes of Lisp face LFACE from FONT-OBJECT.
   If FORCE_P is zero, set only unspecified attributes of LFACE.  The
   exception is `font' attribute.  It is set to FONT_OBJECT regardless
   of FORCE_P.  */

static int
set_lface_from_font (struct frame *f, Lisp_Object lface, Lisp_Object font_object, int force_p)
{
  Lisp_Object val;
  struct font *font = XFONT_OBJECT (font_object);

  /* Set attributes only if unspecified, otherwise face defaults for
     new frames would never take effect.  If the font doesn't have a
     specific property, set a normal value for that.  */

  if (force_p || UNSPECIFIEDP (LFACE_FAMILY (lface)))
    {
      Lisp_Object family = AREF (font_object, FONT_FAMILY_INDEX);

      LFACE_FAMILY (lface) = SYMBOL_NAME (family);
    }

  if (force_p || UNSPECIFIEDP (LFACE_FOUNDRY (lface)))
    {
      Lisp_Object foundry = AREF (font_object, FONT_FOUNDRY_INDEX);

      LFACE_FOUNDRY (lface) = SYMBOL_NAME (foundry);
    }

  if (force_p || UNSPECIFIEDP (LFACE_HEIGHT (lface)))
    {
      int pt = PIXEL_TO_POINT (font->pixel_size * 10, f->resy);

      xassert (pt > 0);
      LFACE_HEIGHT (lface) = make_number (pt);
    }

  if (force_p || UNSPECIFIEDP (LFACE_WEIGHT (lface)))
    {
      val = FONT_WEIGHT_FOR_FACE (font_object);
      LFACE_WEIGHT (lface) = ! NILP (val) ? val :Qnormal;
    }
  if (force_p || UNSPECIFIEDP (LFACE_SLANT (lface)))
    {
      val = FONT_SLANT_FOR_FACE (font_object);
      LFACE_SLANT (lface) = ! NILP (val) ? val : Qnormal;
    }
  if (force_p || UNSPECIFIEDP (LFACE_SWIDTH (lface)))
    {
      val = FONT_WIDTH_FOR_FACE (font_object);
      LFACE_SWIDTH (lface) = ! NILP (val) ? val : Qnormal;
    }

  LFACE_FONT (lface) = font_object;
  return 1;
}

#endif /* HAVE_WINDOW_SYSTEM */


/* Merges the face height FROM with the face height TO, and returns the
   merged height.  If FROM is an invalid height, then INVALID is
   returned instead.  FROM and TO may be either absolute face heights or
   `relative' heights; the returned value is always an absolute height
   unless both FROM and TO are relative.  */

Lisp_Object
merge_face_heights (Lisp_Object from, Lisp_Object to, Lisp_Object invalid)
{
  Lisp_Object result = invalid;

  if (INTEGERP (from))
    /* FROM is absolute, just use it as is.  */
    result = from;
  else if (FLOATP (from))
    /* FROM is a scale, use it to adjust TO.  */
    {
      if (INTEGERP (to))
	/* relative X absolute => absolute */
	result = make_number ((EMACS_INT)(XFLOAT_DATA (from) * XINT (to)));
      else if (FLOATP (to))
	/* relative X relative => relative */
	result = make_float (XFLOAT_DATA (from) * XFLOAT_DATA (to));
      else if (UNSPECIFIEDP (to))
	result = from;
    }
  else if (FUNCTIONP (from))
    /* FROM is a function, which use to adjust TO.  */
    {
      /* Call function with current height as argument.
	 From is the new height.  */
      Lisp_Object args[2];

      args[0] = from;
      args[1] = to;
      result = safe_call (2, args);

      /* Ensure that if TO was absolute, so is the result.  */
      if (INTEGERP (to) && !INTEGERP (result))
	result = invalid;
    }

  return result;
}


/* Merge two Lisp face attribute vectors on frame F, FROM and TO, and
   store the resulting attributes in TO, which must be already be
   completely specified and contain only absolute attributes.  Every
   specified attribute of FROM overrides the corresponding attribute of
   TO; relative attributes in FROM are merged with the absolute value in
   TO and replace it.  NAMED_MERGE_POINTS is used internally to detect
   loops in face inheritance/remapping; it should be 0 when called from
   other places.  */

static INLINE void
merge_face_vectors (struct frame *f, Lisp_Object *from, Lisp_Object *to, struct named_merge_point *named_merge_points)
{
  int i;

  /* If FROM inherits from some other faces, merge their attributes into
     TO before merging FROM's direct attributes.  Note that an :inherit
     attribute of `unspecified' is the same as one of nil; we never
     merge :inherit attributes, so nil is more correct, but lots of
     other code uses `unspecified' as a generic value for face attributes. */
  if (!UNSPECIFIEDP (from[LFACE_INHERIT_INDEX])
      && !NILP (from[LFACE_INHERIT_INDEX]))
    merge_face_ref (f, from[LFACE_INHERIT_INDEX], to, 0, named_merge_points);

  i = LFACE_FONT_INDEX;
  if (!UNSPECIFIEDP (from[i]))
    {
      if (!UNSPECIFIEDP (to[i]))
	to[i] = Fmerge_font_spec (from[i], to[i]);
      else
	to[i] = Fcopy_font_spec (from[i]);
      if (! NILP (AREF (to[i], FONT_FOUNDRY_INDEX)))
	to[LFACE_FOUNDRY_INDEX] = SYMBOL_NAME (AREF (to[i], FONT_FOUNDRY_INDEX));
      if (! NILP (AREF (to[i], FONT_FAMILY_INDEX)))
	to[LFACE_FAMILY_INDEX] = SYMBOL_NAME (AREF (to[i], FONT_FAMILY_INDEX));
      if (! NILP (AREF (to[i], FONT_WEIGHT_INDEX)))
	to[LFACE_WEIGHT_INDEX] = FONT_WEIGHT_FOR_FACE (to[i]);
      if (! NILP (AREF (to[i], FONT_SLANT_INDEX)))
	to[LFACE_SLANT_INDEX] = FONT_SLANT_FOR_FACE (to[i]);
      if (! NILP (AREF (to[i], FONT_WIDTH_INDEX)))
	to[LFACE_SWIDTH_INDEX] = FONT_WIDTH_FOR_FACE (to[i]);
      ASET (to[i], FONT_SIZE_INDEX, Qnil);
    }

  for (i = 1; i < LFACE_VECTOR_SIZE; ++i)
    if (!UNSPECIFIEDP (from[i]))
      {
	if (i == LFACE_HEIGHT_INDEX && !INTEGERP (from[i]))
	  {
	    to[i] = merge_face_heights (from[i], to[i], to[i]);
	    font_clear_prop (to, FONT_SIZE_INDEX);
	  }
	else if (i != LFACE_FONT_INDEX
		 && ! EQ (to[i], from[i]))
	  {
	    to[i] = from[i];
	    if (i >= LFACE_FAMILY_INDEX && i <=LFACE_SLANT_INDEX)
	      font_clear_prop (to,
			       (i == LFACE_FAMILY_INDEX ? FONT_FAMILY_INDEX
				: i == LFACE_FOUNDRY_INDEX ? FONT_FOUNDRY_INDEX
				: i == LFACE_SWIDTH_INDEX ? FONT_WIDTH_INDEX
				: i == LFACE_HEIGHT_INDEX ? FONT_SIZE_INDEX
				: i == LFACE_WEIGHT_INDEX ? FONT_WEIGHT_INDEX
				: FONT_SLANT_INDEX));
	  }
      }

  /* TO is always an absolute face, which should inherit from nothing.
     We blindly copy the :inherit attribute above and fix it up here.  */
  to[LFACE_INHERIT_INDEX] = Qnil;
}

/* Merge the named face FACE_NAME on frame F, into the vector of face
   attributes TO.  NAMED_MERGE_POINTS is used to detect loops in face
   inheritance.  Returns true if FACE_NAME is a valid face name and
   merging succeeded.  */

static int
merge_named_face (struct frame *f, Lisp_Object face_name, Lisp_Object *to, struct named_merge_point *named_merge_points)
{
  struct named_merge_point named_merge_point;

  if (push_named_merge_point (&named_merge_point,
			      face_name, NAMED_MERGE_POINT_NORMAL,
			      &named_merge_points))
    {
      struct gcpro gcpro1;
      Lisp_Object from[LFACE_VECTOR_SIZE];
      int ok = get_lface_attributes (f, face_name, from, 0, named_merge_points);

      if (ok)
	{
	  GCPRO1 (named_merge_point.face_name);
	  merge_face_vectors (f, from, to, named_merge_points);
	  UNGCPRO;
	}

      return ok;
    }
  else
    return 0;
}


/* Merge face attributes from the lisp `face reference' FACE_REF on
   frame F into the face attribute vector TO.  If ERR_MSGS is non-zero,
   problems with FACE_REF cause an error message to be shown.  Return
   non-zero if no errors occurred (regardless of the value of ERR_MSGS).
   NAMED_MERGE_POINTS is used to detect loops in face inheritance or
   list structure; it may be 0 for most callers.

   FACE_REF may be a single face specification or a list of such
   specifications.  Each face specification can be:

   1. A symbol or string naming a Lisp face.

   2. A property list of the form (KEYWORD VALUE ...) where each
   KEYWORD is a face attribute name, and value is an appropriate value
   for that attribute.

   3. Conses or the form (FOREGROUND-COLOR . COLOR) or
   (BACKGROUND-COLOR . COLOR) where COLOR is a color name.  This is
   for compatibility with 20.2.

   Face specifications earlier in lists take precedence over later
   specifications.  */

static int
merge_face_ref (struct frame *f, Lisp_Object face_ref, Lisp_Object *to, int err_msgs, struct named_merge_point *named_merge_points)
{
  int ok = 1;			/* Succeed without an error? */

  if (CONSP (face_ref))
    {
      Lisp_Object first = XCAR (face_ref);

      if (EQ (first, Qforeground_color)
	  || EQ (first, Qbackground_color))
	{
	  /* One of (FOREGROUND-COLOR . COLOR) or (BACKGROUND-COLOR
	     . COLOR).  COLOR must be a string.  */
	  Lisp_Object color_name = XCDR (face_ref);
	  Lisp_Object color = first;

	  if (STRINGP (color_name))
	    {
	      if (EQ (color, Qforeground_color))
		to[LFACE_FOREGROUND_INDEX] = color_name;
	      else
		to[LFACE_BACKGROUND_INDEX] = color_name;
	    }
	  else
	    {
	      if (err_msgs)
		add_to_log ("Invalid face color", color_name, Qnil);
	      ok = 0;
	    }
	}
      else if (SYMBOLP (first)
	       && *SDATA (SYMBOL_NAME (first)) == ':')
	{
	  /* Assume this is the property list form.  */
	  while (CONSP (face_ref) && CONSP (XCDR (face_ref)))
	    {
	      Lisp_Object keyword = XCAR (face_ref);
	      Lisp_Object value = XCAR (XCDR (face_ref));
	      int err = 0;

	      /* Specifying `unspecified' is a no-op.  */
	      if (EQ (value, Qunspecified))
		;
	      else if (EQ (keyword, QCfamily))
		{
		  if (STRINGP (value))
		    {
		      to[LFACE_FAMILY_INDEX] = value;
		      font_clear_prop (to, FONT_FAMILY_INDEX);
		    }
		  else
		    err = 1;
		}
	      else if (EQ (keyword, QCfoundry))
		{
		  if (STRINGP (value))
		    {
		      to[LFACE_FOUNDRY_INDEX] = value;
		      font_clear_prop (to, FONT_FOUNDRY_INDEX);
		    }
		  else
		    err = 1;
		}
	      else if (EQ (keyword, QCheight))
		{
		  Lisp_Object new_height =
		    merge_face_heights (value, to[LFACE_HEIGHT_INDEX], Qnil);

		  if (! NILP (new_height))
		    {
		      to[LFACE_HEIGHT_INDEX] = new_height;
		      font_clear_prop (to, FONT_SIZE_INDEX);
		    }
		  else
		    err = 1;
		}
	      else if (EQ (keyword, QCweight))
		{
		  if (SYMBOLP (value) && FONT_WEIGHT_NAME_NUMERIC (value) >= 0)
		    {
		      to[LFACE_WEIGHT_INDEX] = value;
		      font_clear_prop (to, FONT_WEIGHT_INDEX);
		    }
		  else
		    err = 1;
		}
	      else if (EQ (keyword, QCslant))
		{
		  if (SYMBOLP (value) && FONT_SLANT_NAME_NUMERIC (value) >= 0)
		    {
		      to[LFACE_SLANT_INDEX] = value;
		      font_clear_prop (to, FONT_SLANT_INDEX);
		    }
		  else
		    err = 1;
		}
	      else if (EQ (keyword, QCunderline))
		{
		  if (EQ (value, Qt)
		      || NILP (value)
		      || STRINGP (value))
		    to[LFACE_UNDERLINE_INDEX] = value;
		  else
		    err = 1;
		}
	      else if (EQ (keyword, QCoverline))
		{
		  if (EQ (value, Qt)
		      || NILP (value)
		      || STRINGP (value))
		    to[LFACE_OVERLINE_INDEX] = value;
		  else
		    err = 1;
		}
	      else if (EQ (keyword, QCstrike_through))
		{
		  if (EQ (value, Qt)
		      || NILP (value)
		      || STRINGP (value))
		    to[LFACE_STRIKE_THROUGH_INDEX] = value;
		  else
		    err = 1;
		}
	      else if (EQ (keyword, QCbox))
		{
		  if (EQ (value, Qt))
		    value = make_number (1);
		  if (INTEGERP (value)
		      || STRINGP (value)
		      || CONSP (value)
		      || NILP (value))
		    to[LFACE_BOX_INDEX] = value;
		  else
		    err = 1;
		}
	      else if (EQ (keyword, QCinverse_video)
		       || EQ (keyword, QCreverse_video))
		{
		  if (EQ (value, Qt) || NILP (value))
		    to[LFACE_INVERSE_INDEX] = value;
		  else
		    err = 1;
		}
	      else if (EQ (keyword, QCforeground))
		{
		  if (STRINGP (value))
		    to[LFACE_FOREGROUND_INDEX] = value;
		  else
		    err = 1;
		}
	      else if (EQ (keyword, QCbackground))
		{
		  if (STRINGP (value))
		    to[LFACE_BACKGROUND_INDEX] = value;
		  else
		    err = 1;
		}
	      else if (EQ (keyword, QCstipple))
		{
#if defined(HAVE_X_WINDOWS) || defined(HAVE_NS)
		  Lisp_Object pixmap_p = Fbitmap_spec_p (value);
		  if (!NILP (pixmap_p))
		    to[LFACE_STIPPLE_INDEX] = value;
		  else
		    err = 1;
#endif
		}
	      else if (EQ (keyword, QCwidth))
		{
		  if (SYMBOLP (value) && FONT_WIDTH_NAME_NUMERIC (value) >= 0)
		    {
		      to[LFACE_SWIDTH_INDEX] = value;
		      font_clear_prop (to, FONT_WIDTH_INDEX);
		    }
		  else
		    err = 1;
		}
	      else if (EQ (keyword, QCinherit))
		{
		  /* This is not really very useful; it's just like a
		     normal face reference.  */
		  if (! merge_face_ref (f, value, to,
					err_msgs, named_merge_points))
		    err = 1;
		}
	      else
		err = 1;

	      if (err)
		{
		  add_to_log ("Invalid face attribute %S %S", keyword, value);
		  ok = 0;
		}

	      face_ref = XCDR (XCDR (face_ref));
	    }
	}
      else
	{
	  /* This is a list of face refs.  Those at the beginning of the
	     list take precedence over what follows, so we have to merge
	     from the end backwards.  */
	  Lisp_Object next = XCDR (face_ref);

	  if (! NILP (next))
	    ok = merge_face_ref (f, next, to, err_msgs, named_merge_points);

	  if (! merge_face_ref (f, first, to, err_msgs, named_merge_points))
	    ok = 0;
	}
    }
  else
    {
      /* FACE_REF ought to be a face name.  */
      ok = merge_named_face (f, face_ref, to, named_merge_points);
      if (!ok && err_msgs)
	add_to_log ("Invalid face reference: %s", face_ref, Qnil);
    }

  return ok;
}


DEFUN ("internal-make-lisp-face", Finternal_make_lisp_face,
       Sinternal_make_lisp_face, 1, 2, 0,
       doc: /* Make FACE, a symbol, a Lisp face with all attributes nil.
If FACE was not known as a face before, create a new one.
If optional argument FRAME is specified, make a frame-local face
for that frame.  Otherwise operate on the global face definition.
Value is a vector of face attributes.  */)
  (Lisp_Object face, Lisp_Object frame)
{
  Lisp_Object global_lface, lface;
  struct frame *f;
  int i;

  CHECK_SYMBOL (face);
  global_lface = lface_from_face_name (NULL, face, 0);

  if (!NILP (frame))
    {
      CHECK_LIVE_FRAME (frame);
      f = XFRAME (frame);
      lface = lface_from_face_name (f, face, 0);
    }
  else
    f = NULL, lface = Qnil;

  /* Add a global definition if there is none.  */
  if (NILP (global_lface))
    {
      global_lface = Fmake_vector (make_number (LFACE_VECTOR_SIZE),
				   Qunspecified);
      ASET (global_lface, 0, Qface);
      Vface_new_frame_defaults = Fcons (Fcons (face, global_lface),
					Vface_new_frame_defaults);

      /* Assign the new Lisp face a unique ID.  The mapping from Lisp
	 face id to Lisp face is given by the vector lface_id_to_name.
	 The mapping from Lisp face to Lisp face id is given by the
	 property `face' of the Lisp face name.  */
      if (next_lface_id == lface_id_to_name_size)
	{
	  int new_size = max (50, 2 * lface_id_to_name_size);
	  int sz = new_size * sizeof *lface_id_to_name;
	  lface_id_to_name = (Lisp_Object *) xrealloc (lface_id_to_name, sz);
	  lface_id_to_name_size = new_size;
	}

      lface_id_to_name[next_lface_id] = face;
      Fput (face, Qface, make_number (next_lface_id));
      ++next_lface_id;
    }
  else if (f == NULL)
    for (i = 1; i < LFACE_VECTOR_SIZE; ++i)
      ASET (global_lface, i, Qunspecified);

  /* Add a frame-local definition.  */
  if (f)
    {
      if (NILP (lface))
	{
	  lface = Fmake_vector (make_number (LFACE_VECTOR_SIZE),
				Qunspecified);
	  ASET (lface, 0, Qface);
	  f->face_alist = Fcons (Fcons (face, lface), f->face_alist);
	}
      else
	for (i = 1; i < LFACE_VECTOR_SIZE; ++i)
	  ASET (lface, i, Qunspecified);
    }
  else
    lface = global_lface;

  /* Changing a named face means that all realized faces depending on
     that face are invalid.  Since we cannot tell which realized faces
     depend on the face, make sure they are all removed.  This is done
     by incrementing face_change_count.  The next call to
     init_iterator will then free realized faces.  */
  if (NILP (Fget (face, Qface_no_inherit)))
    {
      ++face_change_count;
      ++windows_or_buffers_changed;
    }

  xassert (LFACEP (lface));
  check_lface (lface);
  return lface;
}


DEFUN ("internal-lisp-face-p", Finternal_lisp_face_p,
       Sinternal_lisp_face_p, 1, 2, 0,
       doc: /* Return non-nil if FACE names a face.
FACE should be a symbol or string.
If optional second argument FRAME is non-nil, check for the
existence of a frame-local face with name FACE on that frame.
Otherwise check for the existence of a global face.  */)
  (Lisp_Object face, Lisp_Object frame)
{
  Lisp_Object lface;

  face = resolve_face_name (face, 1);

  if (!NILP (frame))
    {
      CHECK_LIVE_FRAME (frame);
      lface = lface_from_face_name (XFRAME (frame), face, 0);
    }
  else
    lface = lface_from_face_name (NULL, face, 0);

  return lface;
}


DEFUN ("internal-copy-lisp-face", Finternal_copy_lisp_face,
       Sinternal_copy_lisp_face, 4, 4, 0,
       doc: /* Copy face FROM to TO.
If FRAME is t, copy the global face definition of FROM.
Otherwise, copy the frame-local definition of FROM on FRAME.
If NEW-FRAME is a frame, copy that data into the frame-local
definition of TO on NEW-FRAME.  If NEW-FRAME is nil,
FRAME controls where the data is copied to.

The value is TO.  */)
  (Lisp_Object from, Lisp_Object to, Lisp_Object frame, Lisp_Object new_frame)
{
  Lisp_Object lface, copy;

  CHECK_SYMBOL (from);
  CHECK_SYMBOL (to);

  if (EQ (frame, Qt))
    {
      /* Copy global definition of FROM.  We don't make copies of
	 strings etc. because 20.2 didn't do it either.  */
      lface = lface_from_face_name (NULL, from, 1);
      copy = Finternal_make_lisp_face (to, Qnil);
    }
  else
    {
      /* Copy frame-local definition of FROM.  */
      if (NILP (new_frame))
	new_frame = frame;
      CHECK_LIVE_FRAME (frame);
      CHECK_LIVE_FRAME (new_frame);
      lface = lface_from_face_name (XFRAME (frame), from, 1);
      copy = Finternal_make_lisp_face (to, new_frame);
    }

  memcpy (XVECTOR (copy)->contents, XVECTOR (lface)->contents,
	  LFACE_VECTOR_SIZE * sizeof (Lisp_Object));

  /* Changing a named face means that all realized faces depending on
     that face are invalid.  Since we cannot tell which realized faces
     depend on the face, make sure they are all removed.  This is done
     by incrementing face_change_count.  The next call to
     init_iterator will then free realized faces.  */
  if (NILP (Fget (to, Qface_no_inherit)))
    {
      ++face_change_count;
      ++windows_or_buffers_changed;
    }

  return to;
}


DEFUN ("internal-set-lisp-face-attribute", Finternal_set_lisp_face_attribute,
       Sinternal_set_lisp_face_attribute, 3, 4, 0,
       doc: /* Set attribute ATTR of FACE to VALUE.
FRAME being a frame means change the face on that frame.
FRAME nil means change the face of the selected frame.
FRAME t means change the default for new frames.
FRAME 0 means change the face on all frames, and change the default
  for new frames.  */)
  (Lisp_Object face, Lisp_Object attr, Lisp_Object value, Lisp_Object frame)
{
  Lisp_Object lface;
  Lisp_Object old_value = Qnil;
  /* Set one of enum font_property_index (> 0) if ATTR is one of
     font-related attributes other than QCfont and QCfontset.  */
  enum font_property_index prop_index = 0;

  CHECK_SYMBOL (face);
  CHECK_SYMBOL (attr);

  face = resolve_face_name (face, 1);

  /* If FRAME is 0, change face on all frames, and change the
     default for new frames.  */
  if (INTEGERP (frame) && XINT (frame) == 0)
    {
      Lisp_Object tail;
      Finternal_set_lisp_face_attribute (face, attr, value, Qt);
      FOR_EACH_FRAME (tail, frame)
	Finternal_set_lisp_face_attribute (face, attr, value, frame);
      return face;
    }

  /* Set lface to the Lisp attribute vector of FACE.  */
  if (EQ (frame, Qt))
    {
      lface = lface_from_face_name (NULL, face, 1);

      /* When updating face-new-frame-defaults, we put :ignore-defface
	 where the caller wants `unspecified'.  This forces the frame
	 defaults to ignore the defface value.  Otherwise, the defface
	 will take effect, which is generally not what is intended.
	 The value of that attribute will be inherited from some other
	 face during face merging.  See internal_merge_in_global_face. */
      if (UNSPECIFIEDP (value))
      	value = Qignore_defface;
    }
  else
    {
      if (NILP (frame))
	frame = selected_frame;

      CHECK_LIVE_FRAME (frame);
      lface = lface_from_face_name (XFRAME (frame), face, 0);

      /* If a frame-local face doesn't exist yet, create one.  */
      if (NILP (lface))
	lface = Finternal_make_lisp_face (face, frame);
    }

  if (EQ (attr, QCfamily))
    {
      if (!UNSPECIFIEDP (value) && !IGNORE_DEFFACE_P (value))
	{
	  CHECK_STRING (value);
	  if (SCHARS (value) == 0)
	    signal_error ("Invalid face family", value);
	}
      old_value = LFACE_FAMILY (lface);
      LFACE_FAMILY (lface) = value;
      prop_index = FONT_FAMILY_INDEX;
    }
  else if (EQ (attr, QCfoundry))
    {
      if (!UNSPECIFIEDP (value) && !IGNORE_DEFFACE_P (value))
	{
	  CHECK_STRING (value);
	  if (SCHARS (value) == 0)
	    signal_error ("Invalid face foundry", value);
	}
      old_value = LFACE_FOUNDRY (lface);
      LFACE_FOUNDRY (lface) = value;
      prop_index = FONT_FOUNDRY_INDEX;
    }
  else if (EQ (attr, QCheight))
    {
      if (!UNSPECIFIEDP (value) && !IGNORE_DEFFACE_P (value))
	{
	  if (EQ (face, Qdefault))
	    {
	      /* The default face must have an absolute size.  */
	      if (!INTEGERP (value) || XINT (value) <= 0)
		signal_error ("Invalid default face height", value);
	    }
	  else
	    {
	      /* For non-default faces, do a test merge with a random
		 height to see if VALUE's ok. */
	      Lisp_Object test = merge_face_heights (value,
						     make_number (10),
						     Qnil);
	      if (!INTEGERP (test) || XINT (test) <= 0)
		signal_error ("Invalid face height", value);
	    }
	}

      old_value = LFACE_HEIGHT (lface);
      LFACE_HEIGHT (lface) = value;
      prop_index = FONT_SIZE_INDEX;
    }
  else if (EQ (attr, QCweight))
    {
      if (!UNSPECIFIEDP (value) && !IGNORE_DEFFACE_P (value))
	{
	  CHECK_SYMBOL (value);
	  if (FONT_WEIGHT_NAME_NUMERIC (value) < 0)
	    signal_error ("Invalid face weight", value);
	}
      old_value = LFACE_WEIGHT (lface);
      LFACE_WEIGHT (lface) = value;
      prop_index = FONT_WEIGHT_INDEX;
    }
  else if (EQ (attr, QCslant))
    {
      if (!UNSPECIFIEDP (value) && !IGNORE_DEFFACE_P (value))
	{
	  CHECK_SYMBOL (value);
	  if (FONT_SLANT_NAME_NUMERIC (value) < 0)
	    signal_error ("Invalid face slant", value);
	}
      old_value = LFACE_SLANT (lface);
      LFACE_SLANT (lface) = value;
      prop_index = FONT_SLANT_INDEX;
    }
  else if (EQ (attr, QCunderline))
    {
      if (!UNSPECIFIEDP (value) && !IGNORE_DEFFACE_P (value))
	if ((SYMBOLP (value)
	     && !EQ (value, Qt)
	     && !EQ (value, Qnil))
	    /* Underline color.  */
	    || (STRINGP (value)
		&& SCHARS (value) == 0))
	  signal_error ("Invalid face underline", value);

      old_value = LFACE_UNDERLINE (lface);
      LFACE_UNDERLINE (lface) = value;
    }
  else if (EQ (attr, QCoverline))
    {
      if (!UNSPECIFIEDP (value) && !IGNORE_DEFFACE_P (value))
	if ((SYMBOLP (value)
	     && !EQ (value, Qt)
	     && !EQ (value, Qnil))
	    /* Overline color.  */
	    || (STRINGP (value)
		&& SCHARS (value) == 0))
	  signal_error ("Invalid face overline", value);

      old_value = LFACE_OVERLINE (lface);
      LFACE_OVERLINE (lface) = value;
    }
  else if (EQ (attr, QCstrike_through))
    {
      if (!UNSPECIFIEDP (value) && !IGNORE_DEFFACE_P (value))
	if ((SYMBOLP (value)
	     && !EQ (value, Qt)
	     && !EQ (value, Qnil))
	    /* Strike-through color.  */
	    || (STRINGP (value)
		&& SCHARS (value) == 0))
	  signal_error ("Invalid face strike-through", value);

      old_value = LFACE_STRIKE_THROUGH (lface);
      LFACE_STRIKE_THROUGH (lface) = value;
    }
  else if (EQ (attr, QCbox))
    {
      int valid_p;

      /* Allow t meaning a simple box of width 1 in foreground color
         of the face.  */
      if (EQ (value, Qt))
	value = make_number (1);

      if (UNSPECIFIEDP (value) || IGNORE_DEFFACE_P (value))
	valid_p = 1;
      else if (NILP (value))
	valid_p = 1;
      else if (INTEGERP (value))
	valid_p = XINT (value) != 0;
      else if (STRINGP (value))
	valid_p = SCHARS (value) > 0;
      else if (CONSP (value))
	{
	  Lisp_Object tem;

	  tem = value;
	  while (CONSP (tem))
	    {
	      Lisp_Object k, v;

	      k = XCAR (tem);
	      tem = XCDR (tem);
	      if (!CONSP (tem))
		break;
	      v = XCAR (tem);
	      tem = XCDR (tem);

	      if (EQ (k, QCline_width))
		{
		  if (!INTEGERP (v) || XINT (v) == 0)
		    break;
		}
	      else if (EQ (k, QCcolor))
		{
		  if (!NILP (v) && (!STRINGP (v) || SCHARS (v) == 0))
		    break;
		}
	      else if (EQ (k, QCstyle))
		{
		  if (!EQ (v, Qpressed_button) && !EQ (v, Qreleased_button))
		    break;
		}
	      else
		break;
	    }

	  valid_p = NILP (tem);
	}
      else
	valid_p = 0;

      if (!valid_p)
	signal_error ("Invalid face box", value);

      old_value = LFACE_BOX (lface);
      LFACE_BOX (lface) = value;
    }
  else if (EQ (attr, QCinverse_video)
	   || EQ (attr, QCreverse_video))
    {
      if (!UNSPECIFIEDP (value) && !IGNORE_DEFFACE_P (value))
	{
	  CHECK_SYMBOL (value);
	  if (!EQ (value, Qt) && !NILP (value))
	    signal_error ("Invalid inverse-video face attribute value", value);
	}
      old_value = LFACE_INVERSE (lface);
      LFACE_INVERSE (lface) = value;
    }
  else if (EQ (attr, QCforeground))
    {
      /* Compatibility with 20.x.  */
      if (NILP (value))
	value = Qunspecified;
      if (!UNSPECIFIEDP (value) && !IGNORE_DEFFACE_P (value))
	{
	  /* Don't check for valid color names here because it depends
	     on the frame (display) whether the color will be valid
	     when the face is realized.  */
	  CHECK_STRING (value);
	  if (SCHARS (value) == 0)
	    signal_error ("Empty foreground color value", value);
	}
      old_value = LFACE_FOREGROUND (lface);
      LFACE_FOREGROUND (lface) = value;
    }
  else if (EQ (attr, QCbackground))
    {
      /* Compatibility with 20.x.  */
      if (NILP (value))
	value = Qunspecified;
      if (!UNSPECIFIEDP (value) && !IGNORE_DEFFACE_P (value))
	{
	  /* Don't check for valid color names here because it depends
	     on the frame (display) whether the color will be valid
	     when the face is realized.  */
	  CHECK_STRING (value);
	  if (SCHARS (value) == 0)
	    signal_error ("Empty background color value", value);
	}
      old_value = LFACE_BACKGROUND (lface);
      LFACE_BACKGROUND (lface) = value;
    }
  else if (EQ (attr, QCstipple))
    {
#if defined(HAVE_X_WINDOWS) || defined(HAVE_NS)
      if (!UNSPECIFIEDP (value) && !IGNORE_DEFFACE_P (value)
	  && !NILP (value)
	  && NILP (Fbitmap_spec_p (value)))
	signal_error ("Invalid stipple attribute", value);
      old_value = LFACE_STIPPLE (lface);
      LFACE_STIPPLE (lface) = value;
#endif /* HAVE_X_WINDOWS || HAVE_NS */
    }
  else if (EQ (attr, QCwidth))
    {
      if (!UNSPECIFIEDP (value) && !IGNORE_DEFFACE_P (value))
	{
	  CHECK_SYMBOL (value);
	  if (FONT_WIDTH_NAME_NUMERIC (value) < 0)
	    signal_error ("Invalid face width", value);
	}
      old_value = LFACE_SWIDTH (lface);
      LFACE_SWIDTH (lface) = value;
      prop_index = FONT_WIDTH_INDEX;
    }
  else if (EQ (attr, QCfont))
    {
#ifdef HAVE_WINDOW_SYSTEM
      if (EQ (frame, Qt) || FRAME_WINDOW_P (XFRAME (frame)))
	{
	  if (!UNSPECIFIEDP (value) && !IGNORE_DEFFACE_P (value))
	    {
	      FRAME_PTR f;

	      old_value = LFACE_FONT (lface);
	      if (! FONTP (value))
		{
		  if (STRINGP (value))
		    {
		      Lisp_Object name = value;
		      int fontset = fs_query_fontset (name, 0);

		      if (fontset >= 0)
			name = fontset_ascii (fontset);
		      value = font_spec_from_name (name);
		      if (!FONTP (value))
			signal_error ("Invalid font name", name);
		    }
		  else
		    signal_error ("Invalid font or font-spec", value);
		}
	      if (EQ (frame, Qt))
		f = XFRAME (selected_frame);
	      else
		f = XFRAME (frame);
	      if (! FONT_OBJECT_P (value))
		{
		  Lisp_Object *attrs = XVECTOR (lface)->contents;
		  Lisp_Object font_object;

		  font_object = font_load_for_lface (f, attrs, value);
		  if (NILP (font_object))
		    signal_error ("Font not available", value);
		  value = font_object;
		}
	      set_lface_from_font (f, lface, value, 1);
	    }
	  else
	    LFACE_FONT (lface) = value;
	}
#endif /* HAVE_WINDOW_SYSTEM */
    }
  else if (EQ (attr, QCfontset))
    {
#ifdef HAVE_WINDOW_SYSTEM
      if (EQ (frame, Qt) || FRAME_WINDOW_P (XFRAME (frame)))
	{
	  Lisp_Object tmp;

	  old_value = LFACE_FONTSET (lface);
	  tmp = Fquery_fontset (value, Qnil);
	  if (NILP (tmp))
	    signal_error ("Invalid fontset name", value);
	  LFACE_FONTSET (lface) = value = tmp;
	}
#endif /* HAVE_WINDOW_SYSTEM */
    }
  else if (EQ (attr, QCinherit))
    {
      Lisp_Object tail;
      if (SYMBOLP (value))
	tail = Qnil;
      else
	for (tail = value; CONSP (tail); tail = XCDR (tail))
	  if (!SYMBOLP (XCAR (tail)))
	    break;
      if (NILP (tail))
	LFACE_INHERIT (lface) = value;
      else
	signal_error ("Invalid face inheritance", value);
    }
  else if (EQ (attr, QCbold))
    {
      old_value = LFACE_WEIGHT (lface);
      LFACE_WEIGHT (lface) = NILP (value) ? Qnormal : Qbold;
      prop_index = FONT_WEIGHT_INDEX;
    }
  else if (EQ (attr, QCitalic))
    {
      attr = QCslant;
      old_value = LFACE_SLANT (lface);
      LFACE_SLANT (lface) = NILP (value) ? Qnormal : Qitalic;
      prop_index = FONT_SLANT_INDEX;
    }
  else
    signal_error ("Invalid face attribute name", attr);

  if (prop_index)
    {
      /* If a font-related attribute other than QCfont and QCfontset
	 is specified, and if the original QCfont attribute has a font
	 (font-spec or font-object), set the corresponding property in
	 the font to nil so that the font selector doesn't think that
	 the attribute is mandatory.  Also, clear the average
	 width.  */
      font_clear_prop (XVECTOR (lface)->contents, prop_index);
    }

  /* Changing a named face means that all realized faces depending on
     that face are invalid.  Since we cannot tell which realized faces
     depend on the face, make sure they are all removed.  This is done
     by incrementing face_change_count.  The next call to
     init_iterator will then free realized faces.  */
  if (!EQ (frame, Qt)
      && NILP (Fget (face, Qface_no_inherit))
      && NILP (Fequal (old_value, value)))
    {
      ++face_change_count;
      ++windows_or_buffers_changed;
    }

  if (!UNSPECIFIEDP (value) && !IGNORE_DEFFACE_P (value)
      && NILP (Fequal (old_value, value)))
    {
      Lisp_Object param;

      param = Qnil;

      if (EQ (face, Qdefault))
	{
#ifdef HAVE_WINDOW_SYSTEM
	  /* Changed font-related attributes of the `default' face are
	     reflected in changed `font' frame parameters. */
	  if (FRAMEP (frame)
	      && (prop_index || EQ (attr, QCfont))
	      && lface_fully_specified_p (XVECTOR (lface)->contents))
	    set_font_frame_param (frame, lface);
	  else
#endif /* HAVE_WINDOW_SYSTEM */

	  if (EQ (attr, QCforeground))
	    param = Qforeground_color;
	  else if (EQ (attr, QCbackground))
	    param = Qbackground_color;
	}
#ifdef HAVE_WINDOW_SYSTEM
#ifndef WINDOWSNT
      else if (EQ (face, Qscroll_bar))
	{
	  /* Changing the colors of `scroll-bar' sets frame parameters
	     `scroll-bar-foreground' and `scroll-bar-background'. */
	  if (EQ (attr, QCforeground))
	    param = Qscroll_bar_foreground;
	  else if (EQ (attr, QCbackground))
	    param = Qscroll_bar_background;
	}
#endif /* not WINDOWSNT */
      else if (EQ (face, Qborder))
	{
	  /* Changing background color of `border' sets frame parameter
	     `border-color'.  */
	  if (EQ (attr, QCbackground))
	    param = Qborder_color;
	}
      else if (EQ (face, Qcursor))
	{
	  /* Changing background color of `cursor' sets frame parameter
	     `cursor-color'.  */
	  if (EQ (attr, QCbackground))
	    param = Qcursor_color;
	}
      else if (EQ (face, Qmouse))
	{
	  /* Changing background color of `mouse' sets frame parameter
	     `mouse-color'.  */
	  if (EQ (attr, QCbackground))
	    param = Qmouse_color;
	}
#endif /* HAVE_WINDOW_SYSTEM */
      else if (EQ (face, Qmenu))
	{
	  /* Indicate that we have to update the menu bar when
	     realizing faces on FRAME.  FRAME t change the
	     default for new frames.  We do this by setting
	     setting the flag in new face caches   */
	  if (FRAMEP (frame))
	    {
	      struct frame *f = XFRAME (frame);
	      if (FRAME_FACE_CACHE (f) == NULL)
		FRAME_FACE_CACHE (f) = make_face_cache (f);
	      FRAME_FACE_CACHE (f)->menu_face_changed_p = 1;
	    }
	  else
	    menu_face_changed_default = 1;
	}

      if (!NILP (param))
	{
	  if (EQ (frame, Qt))
	    /* Update `default-frame-alist', which is used for new frames.  */
	    {
	      store_in_alist (&Vdefault_frame_alist, param, value);
	    }
	  else
	    /* Update the current frame's parameters.  */
	    {
	      Lisp_Object cons;
	      cons = XCAR (Vparam_value_alist);
	      XSETCAR (cons, param);
	      XSETCDR (cons, value);
	      Fmodify_frame_parameters (frame, Vparam_value_alist);
	    }
	}
    }

  return face;
}


/* Update the corresponding face when frame parameter PARAM on frame F
   has been assigned the value NEW_VALUE.  */

void
update_face_from_frame_parameter (struct frame *f, Lisp_Object param, Lisp_Object new_value)
{
  Lisp_Object face = Qnil;
  Lisp_Object lface;

  /* If there are no faces yet, give up.  This is the case when called
     from Fx_create_frame, and we do the necessary things later in
     face-set-after-frame-defaults.  */
  if (NILP (f->face_alist))
    return;

  if (EQ (param, Qforeground_color))
    {
      face = Qdefault;
      lface = lface_from_face_name (f, face, 1);
      LFACE_FOREGROUND (lface) = (STRINGP (new_value)
				  ? new_value : Qunspecified);
      realize_basic_faces (f);
    }
  else if (EQ (param, Qbackground_color))
    {
      Lisp_Object frame;

      /* Changing the background color might change the background
	 mode, so that we have to load new defface specs.
	 Call frame-update-face-colors to do that.  */
      XSETFRAME (frame, f);
      call1 (Qframe_set_background_mode, frame);

      face = Qdefault;
      lface = lface_from_face_name (f, face, 1);
      LFACE_BACKGROUND (lface) = (STRINGP (new_value)
				  ? new_value : Qunspecified);
      realize_basic_faces (f);
    }
#ifdef HAVE_WINDOW_SYSTEM
  else if (EQ (param, Qborder_color))
    {
      face = Qborder;
      lface = lface_from_face_name (f, face, 1);
      LFACE_BACKGROUND (lface) = (STRINGP (new_value)
				  ? new_value : Qunspecified);
    }
  else if (EQ (param, Qcursor_color))
    {
      face = Qcursor;
      lface = lface_from_face_name (f, face, 1);
      LFACE_BACKGROUND (lface) = (STRINGP (new_value)
				  ? new_value : Qunspecified);
    }
  else if (EQ (param, Qmouse_color))
    {
      face = Qmouse;
      lface = lface_from_face_name (f, face, 1);
      LFACE_BACKGROUND (lface) = (STRINGP (new_value)
				  ? new_value : Qunspecified);
    }
#endif

  /* Changing a named face means that all realized faces depending on
     that face are invalid.  Since we cannot tell which realized faces
     depend on the face, make sure they are all removed.  This is done
     by incrementing face_change_count.  The next call to
     init_iterator will then free realized faces.  */
  if (!NILP (face)
      && NILP (Fget (face, Qface_no_inherit)))
    {
      ++face_change_count;
      ++windows_or_buffers_changed;
    }
}


#ifdef HAVE_WINDOW_SYSTEM

/* Set the `font' frame parameter of FRAME determined from the
   font-object set in `default' face attributes LFACE.  */

static void
set_font_frame_param (Lisp_Object frame, Lisp_Object lface)
{
  struct frame *f = XFRAME (frame);
  Lisp_Object font;

  if (FRAME_WINDOW_P (f)
      /* Don't do anything if the font is `unspecified'.  This can
	 happen during frame creation.  */
      && (font = LFACE_FONT (lface),
	  ! UNSPECIFIEDP (font)))
    {
      if (FONT_SPEC_P (font))
	{
	  font = font_load_for_lface (f, XVECTOR (lface)->contents, font);
	  if (NILP (font))
	    return;
	  LFACE_FONT (lface) = font;
	}
      f->default_face_done_p = 0;
      Fmodify_frame_parameters (frame, Fcons (Fcons (Qfont, font), Qnil));
    }
}


/* Get the value of X resource RESOURCE, class CLASS for the display
   of frame FRAME.  This is here because ordinary `x-get-resource'
   doesn't take a frame argument.  */

DEFUN ("internal-face-x-get-resource", Finternal_face_x_get_resource,
       Sinternal_face_x_get_resource, 3, 3, 0, doc: /* */)
  (Lisp_Object resource, Lisp_Object class, Lisp_Object frame)
{
  Lisp_Object value = Qnil;
  CHECK_STRING (resource);
  CHECK_STRING (class);
  CHECK_LIVE_FRAME (frame);
  BLOCK_INPUT;
  value = display_x_get_resource (FRAME_X_DISPLAY_INFO (XFRAME (frame)),
				  resource, class, Qnil, Qnil);
  UNBLOCK_INPUT;
  return value;
}


/* Return resource string VALUE as a boolean value, i.e. nil, or t.
   If VALUE is "on" or "true", return t.  If VALUE is "off" or
   "false", return nil.  Otherwise, if SIGNAL_P is non-zero, signal an
   error; if SIGNAL_P is zero, return 0.  */

static Lisp_Object
face_boolean_x_resource_value (Lisp_Object value, int signal_p)
{
  Lisp_Object result = make_number (0);

  xassert (STRINGP (value));

  if (xstrcasecmp (SDATA (value), "on") == 0
      || xstrcasecmp (SDATA (value), "true") == 0)
    result = Qt;
  else if (xstrcasecmp (SDATA (value), "off") == 0
	   || xstrcasecmp (SDATA (value), "false") == 0)
    result = Qnil;
  else if (xstrcasecmp (SDATA (value), "unspecified") == 0)
    result = Qunspecified;
  else if (signal_p)
    signal_error ("Invalid face attribute value from X resource", value);

  return result;
}


DEFUN ("internal-set-lisp-face-attribute-from-resource",
       Finternal_set_lisp_face_attribute_from_resource,
       Sinternal_set_lisp_face_attribute_from_resource,
       3, 4, 0, doc: /* */)
  (Lisp_Object face, Lisp_Object attr, Lisp_Object value, Lisp_Object frame)
{
  CHECK_SYMBOL (face);
  CHECK_SYMBOL (attr);
  CHECK_STRING (value);

  if (xstrcasecmp (SDATA (value), "unspecified") == 0)
    value = Qunspecified;
  else if (EQ (attr, QCheight))
    {
      value = Fstring_to_number (value, make_number (10));
      if (XINT (value) <= 0)
	signal_error ("Invalid face height from X resource", value);
    }
  else if (EQ (attr, QCbold) || EQ (attr, QCitalic))
    value = face_boolean_x_resource_value (value, 1);
  else if (EQ (attr, QCweight) || EQ (attr, QCslant) || EQ (attr, QCwidth))
    value = intern (SDATA (value));
  else if (EQ (attr, QCreverse_video) || EQ (attr, QCinverse_video))
    value = face_boolean_x_resource_value (value, 1);
  else if (EQ (attr, QCunderline)
	   || EQ (attr, QCoverline)
	   || EQ (attr, QCstrike_through))
    {
      Lisp_Object boolean_value;

      /* If the result of face_boolean_x_resource_value is t or nil,
	 VALUE does NOT specify a color. */
      boolean_value = face_boolean_x_resource_value (value, 0);
      if (SYMBOLP (boolean_value))
	value = boolean_value;
    }
  else if (EQ (attr, QCbox) || EQ (attr, QCinherit))
    value = Fcar (Fread_from_string (value, Qnil, Qnil));

  return Finternal_set_lisp_face_attribute (face, attr, value, frame);
}

#endif /* HAVE_WINDOW_SYSTEM */


/***********************************************************************
			      Menu face
 ***********************************************************************/

#if defined HAVE_X_WINDOWS && defined USE_X_TOOLKIT

/* Make menus on frame F appear as specified by the `menu' face.  */

static void
x_update_menu_appearance (struct frame *f)
{
  struct x_display_info *dpyinfo = FRAME_X_DISPLAY_INFO (f);
  XrmDatabase rdb;

  if (dpyinfo
      && (rdb = XrmGetDatabase (FRAME_X_DISPLAY (f)),
	  rdb != NULL))
    {
      char line[512];
      Lisp_Object lface = lface_from_face_name (f, Qmenu, 1);
      struct face *face = FACE_FROM_ID (f, MENU_FACE_ID);
      const char *myname = SDATA (Vx_resource_name);
      int changed_p = 0;
#ifdef USE_MOTIF
      const char *popup_path = "popup_menu";
#else
      const char *popup_path = "menu.popup";
#endif

      if (STRINGP (LFACE_FOREGROUND (lface)))
	{
	  sprintf (line, "%s.%s*foreground: %s",
		   myname, popup_path,
		   SDATA (LFACE_FOREGROUND (lface)));
	  XrmPutLineResource (&rdb, line);
	  sprintf (line, "%s.pane.menubar*foreground: %s",
		   myname, SDATA (LFACE_FOREGROUND (lface)));
	  XrmPutLineResource (&rdb, line);
	  changed_p = 1;
	}

      if (STRINGP (LFACE_BACKGROUND (lface)))
	{
	  sprintf (line, "%s.%s*background: %s",
		   myname, popup_path,
		   SDATA (LFACE_BACKGROUND (lface)));
	  XrmPutLineResource (&rdb, line);
	  sprintf (line, "%s.pane.menubar*background: %s",
		   myname, SDATA (LFACE_BACKGROUND (lface)));
	  XrmPutLineResource (&rdb, line);
	  changed_p = 1;
	}

      if (face->font
	  /* On Solaris 5.8, it's been reported that the `menu' face
	     can be unspecified here, during startup.  Why this
	     happens remains unknown.  -- cyd  */
	  && FONTP (LFACE_FONT (lface))
	  && (!UNSPECIFIEDP (LFACE_FAMILY (lface))
	      || !UNSPECIFIEDP (LFACE_FOUNDRY (lface))
	      || !UNSPECIFIEDP (LFACE_SWIDTH (lface))
	      || !UNSPECIFIEDP (LFACE_WEIGHT (lface))
	      || !UNSPECIFIEDP (LFACE_SLANT (lface))
	      || !UNSPECIFIEDP (LFACE_HEIGHT (lface))))
	{
	  Lisp_Object xlfd = Ffont_xlfd_name (LFACE_FONT (lface), Qnil);
#ifdef USE_MOTIF
	  const char *suffix = "List";
	  Bool motif = True;
#else
#if defined HAVE_X_I18N

	  const char *suffix = "Set";
#else
	  const char *suffix = "";
#endif
	  Bool motif = False;
#endif

	  if (! NILP (xlfd))
	    {
#if defined HAVE_X_I18N
	      char *fontsetname = xic_create_fontsetname (SDATA (xlfd), motif);
#else
	      char *fontsetname = SSDATA (xlfd);
#endif
	      sprintf (line, "%s.pane.menubar*font%s: %s",
		       myname, suffix, fontsetname);
	      XrmPutLineResource (&rdb, line);
	      sprintf (line, "%s.%s*font%s: %s",
		       myname, popup_path, suffix, fontsetname);
	      XrmPutLineResource (&rdb, line);
	      changed_p = 1;
	      if (fontsetname != SSDATA (xlfd))
		xfree (fontsetname);
	    }
	}

      if (changed_p && f->output_data.x->menubar_widget)
	free_frame_menubar (f);
    }
}

#endif /* HAVE_X_WINDOWS && USE_X_TOOLKIT */


DEFUN ("face-attribute-relative-p", Fface_attribute_relative_p,
       Sface_attribute_relative_p,
       2, 2, 0,
       doc: /* Check whether a face attribute value is relative.
Specifically, this function returns t if the attribute ATTRIBUTE
with the value VALUE is relative.

A relative value is one that doesn't entirely override whatever is
inherited from another face.  For most possible attributes,
the only relative value that users see is `unspecified'.
However, for :height, floating point values are also relative.  */)
  (Lisp_Object attribute, Lisp_Object value)
{
  if (EQ (value, Qunspecified) || (EQ (value, Qignore_defface)))
    return Qt;
  else if (EQ (attribute, QCheight))
    return INTEGERP (value) ? Qnil : Qt;
  else
    return Qnil;
}

DEFUN ("merge-face-attribute", Fmerge_face_attribute, Smerge_face_attribute,
       3, 3, 0,
       doc: /* Return face ATTRIBUTE VALUE1 merged with VALUE2.
If VALUE1 or VALUE2 are absolute (see `face-attribute-relative-p'), then
the result will be absolute, otherwise it will be relative.  */)
  (Lisp_Object attribute, Lisp_Object value1, Lisp_Object value2)
{
  if (EQ (value1, Qunspecified) || EQ (value1, Qignore_defface))
    return value2;
  else if (EQ (attribute, QCheight))
    return merge_face_heights (value1, value2, value1);
  else
    return value1;
}


DEFUN ("internal-get-lisp-face-attribute", Finternal_get_lisp_face_attribute,
       Sinternal_get_lisp_face_attribute,
       2, 3, 0,
       doc: /* Return face attribute KEYWORD of face SYMBOL.
If SYMBOL does not name a valid Lisp face or KEYWORD isn't a valid
face attribute name, signal an error.
If the optional argument FRAME is given, report on face SYMBOL in that
frame.  If FRAME is t, report on the defaults for face SYMBOL (for new
frames).  If FRAME is omitted or nil, use the selected frame.  */)
  (Lisp_Object symbol, Lisp_Object keyword, Lisp_Object frame)
{
  Lisp_Object lface, value = Qnil;

  CHECK_SYMBOL (symbol);
  CHECK_SYMBOL (keyword);

  if (EQ (frame, Qt))
    lface = lface_from_face_name (NULL, symbol, 1);
  else
    {
      if (NILP (frame))
	frame = selected_frame;
      CHECK_LIVE_FRAME (frame);
      lface = lface_from_face_name (XFRAME (frame), symbol, 1);
    }

  if (EQ (keyword, QCfamily))
    value = LFACE_FAMILY (lface);
  else if (EQ (keyword, QCfoundry))
    value = LFACE_FOUNDRY (lface);
  else if (EQ (keyword, QCheight))
    value = LFACE_HEIGHT (lface);
  else if (EQ (keyword, QCweight))
    value = LFACE_WEIGHT (lface);
  else if (EQ (keyword, QCslant))
    value = LFACE_SLANT (lface);
  else if (EQ (keyword, QCunderline))
    value = LFACE_UNDERLINE (lface);
  else if (EQ (keyword, QCoverline))
    value = LFACE_OVERLINE (lface);
  else if (EQ (keyword, QCstrike_through))
    value = LFACE_STRIKE_THROUGH (lface);
  else if (EQ (keyword, QCbox))
    value = LFACE_BOX (lface);
  else if (EQ (keyword, QCinverse_video)
	   || EQ (keyword, QCreverse_video))
    value = LFACE_INVERSE (lface);
  else if (EQ (keyword, QCforeground))
    value = LFACE_FOREGROUND (lface);
  else if (EQ (keyword, QCbackground))
    value = LFACE_BACKGROUND (lface);
  else if (EQ (keyword, QCstipple))
    value = LFACE_STIPPLE (lface);
  else if (EQ (keyword, QCwidth))
    value = LFACE_SWIDTH (lface);
  else if (EQ (keyword, QCinherit))
    value = LFACE_INHERIT (lface);
  else if (EQ (keyword, QCfont))
    value = LFACE_FONT (lface);
  else if (EQ (keyword, QCfontset))
    value = LFACE_FONTSET (lface);
  else
    signal_error ("Invalid face attribute name", keyword);

  if (IGNORE_DEFFACE_P (value))
    return Qunspecified;

  return value;
}


DEFUN ("internal-lisp-face-attribute-values",
       Finternal_lisp_face_attribute_values,
       Sinternal_lisp_face_attribute_values, 1, 1, 0,
       doc: /* Return a list of valid discrete values for face attribute ATTR.
Value is nil if ATTR doesn't have a discrete set of valid values.  */)
  (Lisp_Object attr)
{
  Lisp_Object result = Qnil;

  CHECK_SYMBOL (attr);

  if (EQ (attr, QCunderline))
    result = Fcons (Qt, Fcons (Qnil, Qnil));
  else if (EQ (attr, QCoverline))
    result = Fcons (Qt, Fcons (Qnil, Qnil));
  else if (EQ (attr, QCstrike_through))
    result = Fcons (Qt, Fcons (Qnil, Qnil));
  else if (EQ (attr, QCinverse_video) || EQ (attr, QCreverse_video))
    result = Fcons (Qt, Fcons (Qnil, Qnil));

  return result;
}


DEFUN ("internal-merge-in-global-face", Finternal_merge_in_global_face,
       Sinternal_merge_in_global_face, 2, 2, 0,
       doc: /* Add attributes from frame-default definition of FACE to FACE on FRAME.
Default face attributes override any local face attributes.  */)
  (Lisp_Object face, Lisp_Object frame)
{
  int i;
  Lisp_Object global_lface, local_lface, *gvec, *lvec;
  struct frame *f = XFRAME (frame);

  CHECK_LIVE_FRAME (frame);
  global_lface = lface_from_face_name (NULL, face, 1);
  local_lface = lface_from_face_name (f, face, 0);
  if (NILP (local_lface))
    local_lface = Finternal_make_lisp_face (face, frame);

  /* Make every specified global attribute override the local one.
     BEWARE!! This is only used from `face-set-after-frame-default' where
     the local frame is defined from default specs in `face-defface-spec'
     and those should be overridden by global settings.  Hence the strange
     "global before local" priority.  */
  lvec = XVECTOR (local_lface)->contents;
  gvec = XVECTOR (global_lface)->contents;
  for (i = 1; i < LFACE_VECTOR_SIZE; ++i)
    if (IGNORE_DEFFACE_P (gvec[i]))
      lvec[i] = Qunspecified;
    else if (! UNSPECIFIEDP (gvec[i]))
      lvec[i] = gvec[i];

  /* If the default face was changed, update the face cache and the
     `font' frame parameter.  */
  if (EQ (face, Qdefault))
    {
      struct face_cache *c = FRAME_FACE_CACHE (f);
      struct face *newface, *oldface = FACE_FROM_ID (f, DEFAULT_FACE_ID);
      Lisp_Object attrs[LFACE_VECTOR_SIZE];

      /* This can be NULL (e.g., in batch mode).  */
      if (oldface)
	{
	  /* Ensure that the face vector is fully specified by merging
	     the previously-cached vector.  */
	  memcpy (attrs, oldface->lface, sizeof attrs);
	  merge_face_vectors (f, lvec, attrs, 0);
	  memcpy (lvec, attrs, sizeof attrs);
	  newface = realize_face (c, lvec, DEFAULT_FACE_ID);

	  if ((! UNSPECIFIEDP (gvec[LFACE_FAMILY_INDEX])
	       || ! UNSPECIFIEDP (gvec[LFACE_FOUNDRY_INDEX])
	       || ! UNSPECIFIEDP (gvec[LFACE_HEIGHT_INDEX])
	       || ! UNSPECIFIEDP (gvec[LFACE_WEIGHT_INDEX])
	       || ! UNSPECIFIEDP (gvec[LFACE_SLANT_INDEX])
	       || ! UNSPECIFIEDP (gvec[LFACE_SWIDTH_INDEX])
	       || ! UNSPECIFIEDP (gvec[LFACE_FONT_INDEX]))
	      && newface->font)
	    {
	      Lisp_Object name = newface->font->props[FONT_NAME_INDEX];
	      Fmodify_frame_parameters (frame, Fcons (Fcons (Qfont, name),
						      Qnil));
	    }
	}
    }

  return Qnil;
}


/* The following function is implemented for compatibility with 20.2.
   The function is used in x-resolve-fonts when it is asked to
   return fonts with the same size as the font of a face.  This is
   done in fontset.el.  */

DEFUN ("face-font", Fface_font, Sface_font, 1, 3, 0,
       doc: /* Return the font name of face FACE, or nil if it is unspecified.
The font name is, by default, for ASCII characters.
If the optional argument FRAME is given, report on face FACE in that frame.
If FRAME is t, report on the defaults for face FACE (for new frames).
  The font default for a face is either nil, or a list
  of the form (bold), (italic) or (bold italic).
If FRAME is omitted or nil, use the selected frame.  And, in this case,
if the optional third argument CHARACTER is given,
return the font name used for CHARACTER.  */)
  (Lisp_Object face, Lisp_Object frame, Lisp_Object character)
{
  if (EQ (frame, Qt))
    {
      Lisp_Object result = Qnil;
      Lisp_Object lface = lface_from_face_name (NULL, face, 1);

      if (!UNSPECIFIEDP (LFACE_WEIGHT (lface))
	  && !EQ (LFACE_WEIGHT (lface), Qnormal))
	result = Fcons (Qbold, result);

      if (!UNSPECIFIEDP (LFACE_SLANT (lface))
	  && !EQ (LFACE_SLANT (lface), Qnormal))
	result = Fcons (Qitalic, result);

      return result;
    }
  else
    {
      struct frame *f = frame_or_selected_frame (frame, 1);
      int face_id = lookup_named_face (f, face, 1);
      struct face *face = FACE_FROM_ID (f, face_id);

      if (! face)
	return Qnil;
#ifdef HAVE_WINDOW_SYSTEM
      if (FRAME_WINDOW_P (f) && !NILP (character))
	{
	  CHECK_CHARACTER (character);
	  face_id = FACE_FOR_CHAR (f, face, XINT (character), -1, Qnil);
	  face = FACE_FROM_ID (f, face_id);
	}
      return (face->font
	      ? face->font->props[FONT_NAME_INDEX]
	      : Qnil);
#else  /* !HAVE_WINDOW_SYSTEM */
      return build_string (FRAME_MSDOS_P (f)
			   ? "ms-dos"
			   : FRAME_W32_P (f) ? "w32term"
			   :"tty");
#endif
    }
}


/* Compare face-attribute values v1 and v2 for equality.  Value is non-zero if
   all attributes are `equal'.  Tries to be fast because this function
   is called quite often.  */

static INLINE int
face_attr_equal_p (Lisp_Object v1, Lisp_Object v2)
{
  /* Type can differ, e.g. when one attribute is unspecified, i.e. nil,
     and the other is specified.  */
  if (XTYPE (v1) != XTYPE (v2))
    return 0;

  if (EQ (v1, v2))
    return 1;

  switch (XTYPE (v1))
    {
    case Lisp_String:
      if (SBYTES (v1) != SBYTES (v2))
	return 0;

      return memcmp (SDATA (v1), SDATA (v2), SBYTES (v1)) == 0;

    case_Lisp_Int:
    case Lisp_Symbol:
      return 0;

    default:
      return !NILP (Fequal (v1, v2));
    }
}


/* Compare face vectors V1 and V2 for equality.  Value is non-zero if
   all attributes are `equal'.  Tries to be fast because this function
   is called quite often.  */

static INLINE int
lface_equal_p (Lisp_Object *v1, Lisp_Object *v2)
{
  int i, equal_p = 1;

  for (i = 1; i < LFACE_VECTOR_SIZE && equal_p; ++i)
    equal_p = face_attr_equal_p (v1[i], v2[i]);

  return equal_p;
}


DEFUN ("internal-lisp-face-equal-p", Finternal_lisp_face_equal_p,
       Sinternal_lisp_face_equal_p, 2, 3, 0,
       doc: /* True if FACE1 and FACE2 are equal.
If the optional argument FRAME is given, report on FACE1 and FACE2 in that frame.
If FRAME is t, report on the defaults for FACE1 and FACE2 (for new frames).
If FRAME is omitted or nil, use the selected frame.  */)
  (Lisp_Object face1, Lisp_Object face2, Lisp_Object frame)
{
  int equal_p;
  struct frame *f;
  Lisp_Object lface1, lface2;

  if (EQ (frame, Qt))
    f = NULL;
  else
    /* Don't use check_x_frame here because this function is called
       before X frames exist.  At that time, if FRAME is nil,
       selected_frame will be used which is the frame dumped with
       Emacs.  That frame is not an X frame.  */
    f = frame_or_selected_frame (frame, 2);

  lface1 = lface_from_face_name (f, face1, 1);
  lface2 = lface_from_face_name (f, face2, 1);
  equal_p = lface_equal_p (XVECTOR (lface1)->contents,
			   XVECTOR (lface2)->contents);
  return equal_p ? Qt : Qnil;
}


DEFUN ("internal-lisp-face-empty-p", Finternal_lisp_face_empty_p,
       Sinternal_lisp_face_empty_p, 1, 2, 0,
       doc: /* True if FACE has no attribute specified.
If the optional argument FRAME is given, report on face FACE in that frame.
If FRAME is t, report on the defaults for face FACE (for new frames).
If FRAME is omitted or nil, use the selected frame.  */)
  (Lisp_Object face, Lisp_Object frame)
{
  struct frame *f;
  Lisp_Object lface;
  int i;

  if (NILP (frame))
    frame = selected_frame;
  CHECK_LIVE_FRAME (frame);
  f = XFRAME (frame);

  if (EQ (frame, Qt))
    lface = lface_from_face_name (NULL, face, 1);
  else
    lface = lface_from_face_name (f, face, 1);

  for (i = 1; i < LFACE_VECTOR_SIZE; ++i)
    if (!UNSPECIFIEDP (AREF (lface, i)))
      break;

  return i == LFACE_VECTOR_SIZE ? Qt : Qnil;
}


DEFUN ("frame-face-alist", Fframe_face_alist, Sframe_face_alist,
       0, 1, 0,
       doc: /* Return an alist of frame-local faces defined on FRAME.
For internal use only.  */)
  (Lisp_Object frame)
{
  struct frame *f = frame_or_selected_frame (frame, 0);
  return f->face_alist;
}


/* Return a hash code for Lisp string STRING with case ignored.  Used
   below in computing a hash value for a Lisp face.  */

static INLINE unsigned
hash_string_case_insensitive (Lisp_Object string)
{
  const unsigned char *s;
  unsigned hash = 0;
  xassert (STRINGP (string));
  for (s = SDATA (string); *s; ++s)
    hash = (hash << 1) ^ tolower (*s);
  return hash;
}


/* Return a hash code for face attribute vector V.  */

static INLINE unsigned
lface_hash (Lisp_Object *v)
{
  return (hash_string_case_insensitive (v[LFACE_FAMILY_INDEX])
	  ^ hash_string_case_insensitive (v[LFACE_FOUNDRY_INDEX])
	  ^ hash_string_case_insensitive (v[LFACE_FOREGROUND_INDEX])
	  ^ hash_string_case_insensitive (v[LFACE_BACKGROUND_INDEX])
	  ^ XHASH (v[LFACE_WEIGHT_INDEX])
	  ^ XHASH (v[LFACE_SLANT_INDEX])
	  ^ XHASH (v[LFACE_SWIDTH_INDEX])
	  ^ XHASH (v[LFACE_HEIGHT_INDEX]));
}


/* Return non-zero if LFACE1 and LFACE2 specify the same font (without
   considering charsets/registries).  They do if they specify the same
   family, point size, weight, width, slant, and font.  Both
   LFACE1 and LFACE2 must be fully-specified.  */

static INLINE int
lface_same_font_attributes_p (Lisp_Object *lface1, Lisp_Object *lface2)
{
  xassert (lface_fully_specified_p (lface1)
	   && lface_fully_specified_p (lface2));
  return (xstrcasecmp (SDATA (lface1[LFACE_FAMILY_INDEX]),
                       SDATA (lface2[LFACE_FAMILY_INDEX])) == 0
	  && xstrcasecmp (SDATA (lface1[LFACE_FOUNDRY_INDEX]),
			  SDATA (lface2[LFACE_FOUNDRY_INDEX])) == 0
	  && EQ (lface1[LFACE_HEIGHT_INDEX], lface2[LFACE_HEIGHT_INDEX])
	  && EQ (lface1[LFACE_SWIDTH_INDEX], lface2[LFACE_SWIDTH_INDEX])
	  && EQ (lface1[LFACE_WEIGHT_INDEX], lface2[LFACE_WEIGHT_INDEX])
	  && EQ (lface1[LFACE_SLANT_INDEX], lface2[LFACE_SLANT_INDEX])
	  && EQ (lface1[LFACE_FONT_INDEX], lface2[LFACE_FONT_INDEX])
	  && (EQ (lface1[LFACE_FONTSET_INDEX], lface2[LFACE_FONTSET_INDEX])
	      || (STRINGP (lface1[LFACE_FONTSET_INDEX])
		  && STRINGP (lface2[LFACE_FONTSET_INDEX])
		  && ! xstrcasecmp (SDATA (lface1[LFACE_FONTSET_INDEX]),
                                    SDATA (lface2[LFACE_FONTSET_INDEX]))))
	  );
}



/***********************************************************************
			    Realized Faces
 ***********************************************************************/

/* Allocate and return a new realized face for Lisp face attribute
   vector ATTR.  */

static struct face *
make_realized_face (Lisp_Object *attr)
{
  struct face *face = (struct face *) xmalloc (sizeof *face);
  memset (face, 0, sizeof *face);
  face->ascii_face = face;
  memcpy (face->lface, attr, sizeof face->lface);
  return face;
}


/* Free realized face FACE, including its X resources.  FACE may
   be null.  */

void
free_realized_face (struct frame *f, struct face *face)
{
  if (face)
    {
#ifdef HAVE_WINDOW_SYSTEM
      if (FRAME_WINDOW_P (f))
	{
	  /* Free fontset of FACE if it is ASCII face.  */
	  if (face->fontset >= 0 && face == face->ascii_face)
	    free_face_fontset (f, face);
	  if (face->gc)
	    {
	      BLOCK_INPUT;
	      if (face->font)
		font_done_for_face (f, face);
	      x_free_gc (f, face->gc);
	      face->gc = 0;
	      UNBLOCK_INPUT;
	    }

	  free_face_colors (f, face);
	  x_destroy_bitmap (f, face->stipple);
	}
#endif /* HAVE_WINDOW_SYSTEM */

      xfree (face);
    }
}


/* Prepare face FACE for subsequent display on frame F.  This
   allocated GCs if they haven't been allocated yet or have been freed
   by clearing the face cache.  */

void
prepare_face_for_display (struct frame *f, struct face *face)
{
#ifdef HAVE_WINDOW_SYSTEM
  xassert (FRAME_WINDOW_P (f));

  if (face->gc == 0)
    {
      XGCValues xgcv;
      unsigned long mask = GCForeground | GCBackground | GCGraphicsExposures;

      xgcv.foreground = face->foreground;
      xgcv.background = face->background;
#ifdef HAVE_X_WINDOWS
      xgcv.graphics_exposures = False;
#endif

      BLOCK_INPUT;
#ifdef HAVE_X_WINDOWS
      if (face->stipple)
	{
	  xgcv.fill_style = FillOpaqueStippled;
	  xgcv.stipple = x_bitmap_pixmap (f, face->stipple);
	  mask |= GCFillStyle | GCStipple;
	}
#endif
      face->gc = x_create_gc (f, mask, &xgcv);
      if (face->font)
	font_prepare_for_face (f, face);
      UNBLOCK_INPUT;
    }
#endif /* HAVE_WINDOW_SYSTEM */
}


/* Returns the `distance' between the colors X and Y.  */

static int
color_distance (XColor *x, XColor *y)
{
  /* This formula is from a paper title `Colour metric' by Thiadmer Riemersma.
     Quoting from that paper:

         This formula has results that are very close to L*u*v* (with the
         modified lightness curve) and, more importantly, it is a more even
         algorithm: it does not have a range of colours where it suddenly
         gives far from optimal results.

     See <http://www.compuphase.com/cmetric.htm> for more info.  */

  long r = (x->red   - y->red)   >> 8;
  long g = (x->green - y->green) >> 8;
  long b = (x->blue  - y->blue)  >> 8;
  long r_mean = (x->red + y->red) >> 9;

  return
    (((512 + r_mean) * r * r) >> 8)
    + 4 * g * g
    + (((767 - r_mean) * b * b) >> 8);
}


DEFUN ("color-distance", Fcolor_distance, Scolor_distance, 2, 3, 0,
       doc: /* Return an integer distance between COLOR1 and COLOR2 on FRAME.
COLOR1 and COLOR2 may be either strings containing the color name,
or lists of the form (RED GREEN BLUE).
If FRAME is unspecified or nil, the current frame is used.  */)
  (Lisp_Object color1, Lisp_Object color2, Lisp_Object frame)
{
  struct frame *f;
  XColor cdef1, cdef2;

  if (NILP (frame))
    frame = selected_frame;
  CHECK_LIVE_FRAME (frame);
  f = XFRAME (frame);

  if (!(CONSP (color1) && parse_rgb_list (color1, &cdef1))
      && !(STRINGP (color1) && defined_color (f, SDATA (color1), &cdef1, 0)))
    signal_error ("Invalid color", color1);
  if (!(CONSP (color2) && parse_rgb_list (color2, &cdef2))
      && !(STRINGP (color2) && defined_color (f, SDATA (color2), &cdef2, 0)))
    signal_error ("Invalid color", color2);

  return make_number (color_distance (&cdef1, &cdef2));
}


/***********************************************************************
			      Face Cache
 ***********************************************************************/

/* Return a new face cache for frame F.  */

static struct face_cache *
make_face_cache (struct frame *f)
{
  struct face_cache *c;
  int size;

  c = (struct face_cache *) xmalloc (sizeof *c);
  memset (c, 0, sizeof *c);
  size = FACE_CACHE_BUCKETS_SIZE * sizeof *c->buckets;
  c->buckets = (struct face **) xmalloc (size);
  memset (c->buckets, 0, size);
  c->size = 50;
  c->faces_by_id = (struct face **) xmalloc (c->size * sizeof *c->faces_by_id);
  c->f = f;
  c->menu_face_changed_p = menu_face_changed_default;
  return c;
}


/* Clear out all graphics contexts for all realized faces, except for
   the basic faces.  This should be done from time to time just to avoid
   keeping too many graphics contexts that are no longer needed.  */

static void
clear_face_gcs (struct face_cache *c)
{
  if (c && FRAME_WINDOW_P (c->f))
    {
#ifdef HAVE_WINDOW_SYSTEM
      int i;
      for (i = BASIC_FACE_ID_SENTINEL; i < c->used; ++i)
	{
	  struct face *face = c->faces_by_id[i];
	  if (face && face->gc)
	    {
	      BLOCK_INPUT;
	      if (face->font)
		font_done_for_face (c->f, face);
	      x_free_gc (c->f, face->gc);
	      face->gc = 0;
	      UNBLOCK_INPUT;
	    }
	}
#endif /* HAVE_WINDOW_SYSTEM */
    }
}


/* Free all realized faces in face cache C, including basic faces.
   C may be null.  If faces are freed, make sure the frame's current
   matrix is marked invalid, so that a display caused by an expose
   event doesn't try to use faces we destroyed.  */

static void
free_realized_faces (struct face_cache *c)
{
  if (c && c->used)
    {
      int i, size;
      struct frame *f = c->f;

      /* We must block input here because we can't process X events
	 safely while only some faces are freed, or when the frame's
	 current matrix still references freed faces.  */
      BLOCK_INPUT;

      for (i = 0; i < c->used; ++i)
	{
	  free_realized_face (f, c->faces_by_id[i]);
	  c->faces_by_id[i] = NULL;
	}

      c->used = 0;
      size = FACE_CACHE_BUCKETS_SIZE * sizeof *c->buckets;
      memset (c->buckets, 0, size);

      /* Must do a thorough redisplay the next time.  Mark current
	 matrices as invalid because they will reference faces freed
	 above.  This function is also called when a frame is
	 destroyed.  In this case, the root window of F is nil.  */
      if (WINDOWP (f->root_window))
	{
	  clear_current_matrices (f);
	  ++windows_or_buffers_changed;
	}

      UNBLOCK_INPUT;
    }
}


/* Free all realized faces that are using FONTSET on frame F.  */

void
free_realized_faces_for_fontset (struct frame *f, int fontset)
{
  struct face_cache *cache = FRAME_FACE_CACHE (f);
  struct face *face;
  int i;

  /* We must block input here because we can't process X events safely
     while only some faces are freed, or when the frame's current
     matrix still references freed faces.  */
  BLOCK_INPUT;

  for (i = 0; i < cache->used; i++)
    {
      face = cache->faces_by_id[i];
      if (face
	  && face->fontset == fontset)
	{
	  uncache_face (cache, face);
	  free_realized_face (f, face);
	}
    }

  /* Must do a thorough redisplay the next time.  Mark current
     matrices as invalid because they will reference faces freed
     above.  This function is also called when a frame is destroyed.
     In this case, the root window of F is nil.  */
  if (WINDOWP (f->root_window))
    {
      clear_current_matrices (f);
      ++windows_or_buffers_changed;
    }

  UNBLOCK_INPUT;
}


/* Free all realized faces on FRAME or on all frames if FRAME is nil.
   This is done after attributes of a named face have been changed,
   because we can't tell which realized faces depend on that face.  */

void
free_all_realized_faces (Lisp_Object frame)
{
  if (NILP (frame))
    {
      Lisp_Object rest;
      FOR_EACH_FRAME (rest, frame)
	free_realized_faces (FRAME_FACE_CACHE (XFRAME (frame)));
    }
  else
    free_realized_faces (FRAME_FACE_CACHE (XFRAME (frame)));
}


/* Free face cache C and faces in it, including their X resources.  */

static void
free_face_cache (struct face_cache *c)
{
  if (c)
    {
      free_realized_faces (c);
      xfree (c->buckets);
      xfree (c->faces_by_id);
      xfree (c);
    }
}


/* Cache realized face FACE in face cache C.  HASH is the hash value
   of FACE.  If FACE is for ASCII characters (i.e. FACE->ascii_face ==
   FACE), insert the new face to the beginning of the collision list
   of the face hash table of C.  Otherwise, add the new face to the
   end of the collision list.  This way, lookup_face can quickly find
   that a requested face is not cached.  */

static void
cache_face (struct face_cache *c, struct face *face, unsigned int hash)
{
  int i = hash % FACE_CACHE_BUCKETS_SIZE;

  face->hash = hash;

  if (face->ascii_face != face)
    {
      struct face *last = c->buckets[i];
      if (last)
	{
	  while (last->next)
	    last = last->next;
	  last->next = face;
	  face->prev = last;
	  face->next = NULL;
	}
      else
	{
	  c->buckets[i] = face;
	  face->prev = face->next = NULL;
	}
    }
  else
    {
      face->prev = NULL;
      face->next = c->buckets[i];
      if (face->next)
	face->next->prev = face;
      c->buckets[i] = face;
    }

  /* Find a free slot in C->faces_by_id and use the index of the free
     slot as FACE->id.  */
  for (i = 0; i < c->used; ++i)
    if (c->faces_by_id[i] == NULL)
      break;
  face->id = i;

  /* Maybe enlarge C->faces_by_id.  */
  if (i == c->used)
    {
      if (c->used == c->size)
	{
	  int new_size, sz;
	  new_size = min (2 * c->size, MAX_FACE_ID);
	  if (new_size == c->size)
	    abort ();  /* Alternatives?  ++kfs */
	  sz = new_size * sizeof *c->faces_by_id;
	  c->faces_by_id = (struct face **) xrealloc (c->faces_by_id, sz);
	  c->size = new_size;
	}
      c->used++;
    }

#if GLYPH_DEBUG
  /* Check that FACE got a unique id.  */
  {
    int j, n;
    struct face *face;

    for (j = n = 0; j < FACE_CACHE_BUCKETS_SIZE; ++j)
      for (face = c->buckets[j]; face; face = face->next)
	if (face->id == i)
	  ++n;

    xassert (n == 1);
  }
#endif /* GLYPH_DEBUG */

  c->faces_by_id[i] = face;
}


/* Remove face FACE from cache C.  */

static void
uncache_face (struct face_cache *c, struct face *face)
{
  int i = face->hash % FACE_CACHE_BUCKETS_SIZE;

  if (face->prev)
    face->prev->next = face->next;
  else
    c->buckets[i] = face->next;

  if (face->next)
    face->next->prev = face->prev;

  c->faces_by_id[face->id] = NULL;
  if (face->id == c->used)
    --c->used;
}


/* Look up a realized face with face attributes ATTR in the face cache
   of frame F.  The face will be used to display ASCII characters.
   Value is the ID of the face found.  If no suitable face is found,
   realize a new one.  */

static INLINE int
lookup_face (struct frame *f, Lisp_Object *attr)
{
  struct face_cache *cache = FRAME_FACE_CACHE (f);
  unsigned hash;
  int i;
  struct face *face;

  xassert (cache != NULL);
  check_lface_attrs (attr);

  /* Look up ATTR in the face cache.  */
  hash = lface_hash (attr);
  i = hash % FACE_CACHE_BUCKETS_SIZE;

  for (face = cache->buckets[i]; face; face = face->next)
    {
      if (face->ascii_face != face)
	{
	  /* There's no more ASCII face.  */
	  face = NULL;
	  break;
	}
      if (face->hash == hash
	  && lface_equal_p (face->lface, attr))
	break;
    }

  /* If not found, realize a new face.  */
  if (face == NULL)
    face = realize_face (cache, attr, -1);

#if GLYPH_DEBUG
  xassert (face == FACE_FROM_ID (f, face->id));
#endif /* GLYPH_DEBUG */

  return face->id;
}

#ifdef HAVE_WINDOW_SYSTEM
/* Look up a realized face that has the same attributes as BASE_FACE
   except for the font in the face cache of frame F.  If FONT-OBJECT
   is not nil, it is an already opened font.  If FONT-OBJECT is nil,
   the face has no font.  Value is the ID of the face found.  If no
   suitable face is found, realize a new one.  */

int
face_for_font (struct frame *f, Lisp_Object font_object, struct face *base_face)
{
  struct face_cache *cache = FRAME_FACE_CACHE (f);
  unsigned hash;
  int i;
  struct face *face;

  xassert (cache != NULL);
  base_face = base_face->ascii_face;
  hash = lface_hash (base_face->lface);
  i = hash % FACE_CACHE_BUCKETS_SIZE;

  for (face = cache->buckets[i]; face; face = face->next)
    {
      if (face->ascii_face == face)
	continue;
      if (face->ascii_face == base_face
	  && face->font == (NILP (font_object) ? NULL
			    : XFONT_OBJECT (font_object))
	  && lface_equal_p (face->lface, base_face->lface))
	return face->id;
    }

  /* If not found, realize a new face.  */
  face = realize_non_ascii_face (f, font_object, base_face);
  return face->id;
}
#endif	/* HAVE_WINDOW_SYSTEM */

/* Return the face id of the realized face for named face SYMBOL on
   frame F suitable for displaying ASCII characters.  Value is -1 if
   the face couldn't be determined, which might happen if the default
   face isn't realized and cannot be realized.  */

int
lookup_named_face (struct frame *f, Lisp_Object symbol, int signal_p)
{
  Lisp_Object attrs[LFACE_VECTOR_SIZE];
  Lisp_Object symbol_attrs[LFACE_VECTOR_SIZE];
  struct face *default_face = FACE_FROM_ID (f, DEFAULT_FACE_ID);

  if (default_face == NULL)
    {
      if (!realize_basic_faces (f))
	return -1;
      default_face = FACE_FROM_ID (f, DEFAULT_FACE_ID);
      if (default_face == NULL)
	abort ();  /* realize_basic_faces must have set it up  */
    }

  if (! get_lface_attributes (f, symbol, symbol_attrs, signal_p, 0))
    return -1;

  memcpy (attrs, default_face->lface, sizeof attrs);
  merge_face_vectors (f, symbol_attrs, attrs, 0);

  return lookup_face (f, attrs);
}


/* Return the display face-id of the basic face who's canonical face-id
   is FACE_ID.  The return value will usually simply be FACE_ID, unless that
   basic face has bee remapped via Vface_remapping_alist.  This function is
   conservative: if something goes wrong, it will simply return FACE_ID
   rather than signal an error.   */

int
lookup_basic_face (struct frame *f, int face_id)
{
  Lisp_Object name, mapping;
  int remapped_face_id;

  if (NILP (Vface_remapping_alist))
    return face_id;		/* Nothing to do.  */

  switch (face_id)
    {
    case DEFAULT_FACE_ID:		name = Qdefault;		break;
    case MODE_LINE_FACE_ID:		name = Qmode_line;		break;
    case MODE_LINE_INACTIVE_FACE_ID:	name = Qmode_line_inactive;	break;
    case HEADER_LINE_FACE_ID:		name = Qheader_line;		break;
    case TOOL_BAR_FACE_ID:		name = Qtool_bar;		break;
    case FRINGE_FACE_ID:		name = Qfringe;			break;
    case SCROLL_BAR_FACE_ID:		name = Qscroll_bar;		break;
    case BORDER_FACE_ID:		name = Qborder;			break;
    case CURSOR_FACE_ID:		name = Qcursor;			break;
    case MOUSE_FACE_ID:			name = Qmouse;			break;
    case MENU_FACE_ID:			name = Qmenu;			break;

    default:
      abort ();	    /* the caller is supposed to pass us a basic face id */
    }

  /* Do a quick scan through Vface_remapping_alist, and return immediately
     if there is no remapping for face NAME.  This is just an optimization
     for the very common no-remapping case.  */
  mapping = assq_no_quit (name, Vface_remapping_alist);
  if (NILP (mapping))
    return face_id;		/* Give up.  */

  /* If there is a remapping entry, lookup the face using NAME, which will
     handle the remapping too.  */
  remapped_face_id = lookup_named_face (f, name, 0);
  if (remapped_face_id < 0)
    return face_id;		/* Give up. */

  return remapped_face_id;
}


/* Return the ID of the realized ASCII face of Lisp face with ID
   LFACE_ID on frame F.  Value is -1 if LFACE_ID isn't valid.  */

int
ascii_face_of_lisp_face (struct frame *f, int lface_id)
{
  int face_id;

  if (lface_id >= 0 && lface_id < lface_id_to_name_size)
    {
      Lisp_Object face_name = lface_id_to_name[lface_id];
      face_id = lookup_named_face (f, face_name, 1);
    }
  else
    face_id = -1;

  return face_id;
}


/* Return a face for charset ASCII that is like the face with id
   FACE_ID on frame F, but has a font that is STEPS steps smaller.
   STEPS < 0 means larger.  Value is the id of the face.  */

int
smaller_face (struct frame *f, int face_id, int steps)
{
#ifdef HAVE_WINDOW_SYSTEM
  struct face *face;
  Lisp_Object attrs[LFACE_VECTOR_SIZE];
  int pt, last_pt, last_height;
  int delta;
  int new_face_id;
  struct face *new_face;

  /* If not called for an X frame, just return the original face.  */
  if (FRAME_TERMCAP_P (f))
    return face_id;

  /* Try in increments of 1/2 pt.  */
  delta = steps < 0 ? 5 : -5;
  steps = eabs (steps);

  face = FACE_FROM_ID (f, face_id);
  memcpy (attrs, face->lface, sizeof attrs);
  pt = last_pt = XFASTINT (attrs[LFACE_HEIGHT_INDEX]);
  new_face_id = face_id;
  last_height = FONT_HEIGHT (face->font);

  while (steps
	 && pt + delta > 0
	 /* Give up if we cannot find a font within 10pt.  */
	 && eabs (last_pt - pt) < 100)
    {
      /* Look up a face for a slightly smaller/larger font.  */
      pt += delta;
      attrs[LFACE_HEIGHT_INDEX] = make_number (pt);
      new_face_id = lookup_face (f, attrs);
      new_face = FACE_FROM_ID (f, new_face_id);

      /* If height changes, count that as one step.  */
      if ((delta < 0 && FONT_HEIGHT (new_face->font) < last_height)
	  || (delta > 0 && FONT_HEIGHT (new_face->font) > last_height))
	{
	  --steps;
	  last_height = FONT_HEIGHT (new_face->font);
	  last_pt = pt;
	}
    }

  return new_face_id;

#else /* not HAVE_WINDOW_SYSTEM */

  return face_id;

#endif /* not HAVE_WINDOW_SYSTEM */
}


/* Return a face for charset ASCII that is like the face with id
   FACE_ID on frame F, but has height HEIGHT.  */

int
face_with_height (struct frame *f, int face_id, int height)
{
#ifdef HAVE_WINDOW_SYSTEM
  struct face *face;
  Lisp_Object attrs[LFACE_VECTOR_SIZE];

  if (FRAME_TERMCAP_P (f)
      || height <= 0)
    return face_id;

  face = FACE_FROM_ID (f, face_id);
  memcpy (attrs, face->lface, sizeof attrs);
  attrs[LFACE_HEIGHT_INDEX] = make_number (height);
  font_clear_prop (attrs, FONT_SIZE_INDEX);
  face_id = lookup_face (f, attrs);
#endif /* HAVE_WINDOW_SYSTEM */

  return face_id;
}


/* Return the face id of the realized face for named face SYMBOL on
   frame F suitable for displaying ASCII characters, and use
   attributes of the face FACE_ID for attributes that aren't
   completely specified by SYMBOL.  This is like lookup_named_face,
   except that the default attributes come from FACE_ID, not from the
   default face.  FACE_ID is assumed to be already realized.  */

int
lookup_derived_face (struct frame *f, Lisp_Object symbol, int face_id, int signal_p)
{
  Lisp_Object attrs[LFACE_VECTOR_SIZE];
  Lisp_Object symbol_attrs[LFACE_VECTOR_SIZE];
  struct face *default_face = FACE_FROM_ID (f, face_id);

  if (!default_face)
    abort ();

  if (!get_lface_attributes (f, symbol, symbol_attrs, signal_p, 0))
    return -1;

  memcpy (attrs, default_face->lface, sizeof attrs);
  merge_face_vectors (f, symbol_attrs, attrs, 0);
  return lookup_face (f, attrs);
}

DEFUN ("face-attributes-as-vector", Fface_attributes_as_vector,
       Sface_attributes_as_vector, 1, 1, 0,
       doc: /* Return a vector of face attributes corresponding to PLIST.  */)
  (Lisp_Object plist)
{
  Lisp_Object lface;
  lface = Fmake_vector (make_number (LFACE_VECTOR_SIZE),
			Qunspecified);
  merge_face_ref (XFRAME (selected_frame), plist, XVECTOR (lface)->contents,
		  1, 0);
  return lface;
}



/***********************************************************************
			Face capability testing
 ***********************************************************************/


/* If the distance (as returned by color_distance) between two colors is
   less than this, then they are considered the same, for determining
   whether a color is supported or not.  The range of values is 0-65535.  */

#define TTY_SAME_COLOR_THRESHOLD  10000

#ifdef HAVE_WINDOW_SYSTEM

/* Return non-zero if all the face attributes in ATTRS are supported
   on the window-system frame F.

   The definition of `supported' is somewhat heuristic, but basically means
   that a face containing all the attributes in ATTRS, when merged with the
   default face for display, can be represented in a way that's

    \(1) different in appearance than the default face, and
    \(2) `close in spirit' to what the attributes specify, if not exact.  */

static int
x_supports_face_attributes_p (struct frame *f, Lisp_Object *attrs, struct face *def_face)
{
  Lisp_Object *def_attrs = def_face->lface;

  /* Check that other specified attributes are different that the default
     face.  */
  if ((!UNSPECIFIEDP (attrs[LFACE_UNDERLINE_INDEX])
       && face_attr_equal_p (attrs[LFACE_UNDERLINE_INDEX],
			     def_attrs[LFACE_UNDERLINE_INDEX]))
      || (!UNSPECIFIEDP (attrs[LFACE_INVERSE_INDEX])
	  && face_attr_equal_p (attrs[LFACE_INVERSE_INDEX],
				def_attrs[LFACE_INVERSE_INDEX]))
      || (!UNSPECIFIEDP (attrs[LFACE_FOREGROUND_INDEX])
	  && face_attr_equal_p (attrs[LFACE_FOREGROUND_INDEX],
				def_attrs[LFACE_FOREGROUND_INDEX]))
      || (!UNSPECIFIEDP (attrs[LFACE_BACKGROUND_INDEX])
	  && face_attr_equal_p (attrs[LFACE_BACKGROUND_INDEX],
				def_attrs[LFACE_BACKGROUND_INDEX]))
      || (!UNSPECIFIEDP (attrs[LFACE_STIPPLE_INDEX])
	  && face_attr_equal_p (attrs[LFACE_STIPPLE_INDEX],
				def_attrs[LFACE_STIPPLE_INDEX]))
      || (!UNSPECIFIEDP (attrs[LFACE_OVERLINE_INDEX])
	  && face_attr_equal_p (attrs[LFACE_OVERLINE_INDEX],
				def_attrs[LFACE_OVERLINE_INDEX]))
      || (!UNSPECIFIEDP (attrs[LFACE_STRIKE_THROUGH_INDEX])
	  && face_attr_equal_p (attrs[LFACE_STRIKE_THROUGH_INDEX],
				def_attrs[LFACE_STRIKE_THROUGH_INDEX]))
      || (!UNSPECIFIEDP (attrs[LFACE_BOX_INDEX])
	  && face_attr_equal_p (attrs[LFACE_BOX_INDEX],
				def_attrs[LFACE_BOX_INDEX])))
    return 0;

  /* Check font-related attributes, as those are the most commonly
     "unsupported" on a window-system (because of missing fonts).  */
  if (!UNSPECIFIEDP (attrs[LFACE_FAMILY_INDEX])
      || !UNSPECIFIEDP (attrs[LFACE_FOUNDRY_INDEX])
      || !UNSPECIFIEDP (attrs[LFACE_HEIGHT_INDEX])
      || !UNSPECIFIEDP (attrs[LFACE_WEIGHT_INDEX])
      || !UNSPECIFIEDP (attrs[LFACE_SLANT_INDEX])
      || !UNSPECIFIEDP (attrs[LFACE_SWIDTH_INDEX]))
    {
      int face_id;
      struct face *face;
      Lisp_Object merged_attrs[LFACE_VECTOR_SIZE];
      int i;

      memcpy (merged_attrs, def_attrs, sizeof merged_attrs);

      merge_face_vectors (f, attrs, merged_attrs, 0);

      face_id = lookup_face (f, merged_attrs);
      face = FACE_FROM_ID (f, face_id);

      if (! face)
	error ("Cannot make face");

      /* If the font is the same, or no font is found, then not
	 supported.  */
      if (face->font == def_face->font
	  || ! face->font)
	return 0;
      for (i = FONT_TYPE_INDEX; i <= FONT_SIZE_INDEX; i++)
	if (! EQ (face->font->props[i], def_face->font->props[i]))
	  {
	    Lisp_Object s1, s2;

	    if (i < FONT_FOUNDRY_INDEX || i > FONT_REGISTRY_INDEX
		|| face->font->driver->case_sensitive)
	      return 1;
	    s1 = SYMBOL_NAME (face->font->props[i]);
	    s2 = SYMBOL_NAME (def_face->font->props[i]);
	    if (! EQ (Fcompare_strings (s1, make_number (0), Qnil,
					s2, make_number (0), Qnil, Qt), Qt))
	      return 1;
	  }
      return 0;
    }

  /* Everything checks out, this face is supported.  */
  return 1;
}

#endif	/* HAVE_WINDOW_SYSTEM */

/* Return non-zero if all the face attributes in ATTRS are supported
   on the tty frame F.

   The definition of `supported' is somewhat heuristic, but basically means
   that a face containing all the attributes in ATTRS, when merged
   with the default face for display, can be represented in a way that's

    \(1) different in appearance than the default face, and
    \(2) `close in spirit' to what the attributes specify, if not exact.

   Point (2) implies that a `:weight black' attribute will be satisfied
   by any terminal that can display bold, and a `:foreground "yellow"' as
   long as the terminal can display a yellowish color, but `:slant italic'
   will _not_ be satisfied by the tty display code's automatic
   substitution of a `dim' face for italic.  */

static int
tty_supports_face_attributes_p (struct frame *f, Lisp_Object *attrs, struct face *def_face)
{
  int weight;
  Lisp_Object val, fg, bg;
  XColor fg_tty_color, fg_std_color;
  XColor bg_tty_color, bg_std_color;
  unsigned test_caps = 0;
  Lisp_Object *def_attrs = def_face->lface;


  /* First check some easy-to-check stuff; ttys support none of the
     following attributes, so we can just return false if any are requested
     (even if `nominal' values are specified, we should still return false,
     as that will be the same value that the default face uses).  We
     consider :slant unsupportable on ttys, even though the face code
     actually `fakes' them using a dim attribute if possible.  This is
     because the faked result is too different from what the face
     specifies.  */
  if (!UNSPECIFIEDP (attrs[LFACE_FAMILY_INDEX])
      || !UNSPECIFIEDP (attrs[LFACE_FOUNDRY_INDEX])
      || !UNSPECIFIEDP (attrs[LFACE_STIPPLE_INDEX])
      || !UNSPECIFIEDP (attrs[LFACE_HEIGHT_INDEX])
      || !UNSPECIFIEDP (attrs[LFACE_SWIDTH_INDEX])
      || !UNSPECIFIEDP (attrs[LFACE_OVERLINE_INDEX])
      || !UNSPECIFIEDP (attrs[LFACE_STRIKE_THROUGH_INDEX])
      || !UNSPECIFIEDP (attrs[LFACE_BOX_INDEX])
      || !UNSPECIFIEDP (attrs[LFACE_SLANT_INDEX]))
    return 0;


  /* Test for terminal `capabilities' (non-color character attributes).  */

  /* font weight (bold/dim) */
  val = attrs[LFACE_WEIGHT_INDEX];
  if (!UNSPECIFIEDP (val)
      && (weight = FONT_WEIGHT_NAME_NUMERIC (val), weight >= 0))
    {
      int def_weight = FONT_WEIGHT_NAME_NUMERIC (def_attrs[LFACE_WEIGHT_INDEX]);

      if (weight > 100)
	{
	  if (def_weight > 100)
	    return 0;		/* same as default */
	  test_caps = TTY_CAP_BOLD;
	}
      else if (weight < 100)
	{
	  if (def_weight < 100)
	    return 0;		/* same as default */
	  test_caps = TTY_CAP_DIM;
	}
      else if (def_weight == 100)
	return 0;		/* same as default */
    }

  /* underlining */
  val = attrs[LFACE_UNDERLINE_INDEX];
  if (!UNSPECIFIEDP (val))
    {
      if (STRINGP (val))
	return 0;		/* ttys can't use colored underlines */
      else if (face_attr_equal_p (val, def_attrs[LFACE_UNDERLINE_INDEX]))
	return 0;		/* same as default */
      else
	test_caps |= TTY_CAP_UNDERLINE;
    }

  /* inverse video */
  val = attrs[LFACE_INVERSE_INDEX];
  if (!UNSPECIFIEDP (val))
    {
      if (face_attr_equal_p (val, def_attrs[LFACE_INVERSE_INDEX]))
	return 0;		/* same as default */
      else
	test_caps |= TTY_CAP_INVERSE;
    }


  /* Color testing.  */

  /* Default the color indices in FG_TTY_COLOR and BG_TTY_COLOR, since
     we use them when calling `tty_capable_p' below, even if the face
     specifies no colors.  */
  fg_tty_color.pixel = FACE_TTY_DEFAULT_FG_COLOR;
  bg_tty_color.pixel = FACE_TTY_DEFAULT_BG_COLOR;

  /* Check if foreground color is close enough.  */
  fg = attrs[LFACE_FOREGROUND_INDEX];
  if (STRINGP (fg))
    {
      Lisp_Object def_fg = def_attrs[LFACE_FOREGROUND_INDEX];

      if (face_attr_equal_p (fg, def_fg))
	return 0;		/* same as default */
      else if (! tty_lookup_color (f, fg, &fg_tty_color, &fg_std_color))
	return 0;		/* not a valid color */
      else if (color_distance (&fg_tty_color, &fg_std_color)
	       > TTY_SAME_COLOR_THRESHOLD)
	return 0;		/* displayed color is too different */
      else
	/* Make sure the color is really different than the default.  */
	{
	  XColor def_fg_color;
	  if (tty_lookup_color (f, def_fg, &def_fg_color, 0)
	      && (color_distance (&fg_tty_color, &def_fg_color)
		  <= TTY_SAME_COLOR_THRESHOLD))
	    return 0;
	}
    }

  /* Check if background color is close enough.  */
  bg = attrs[LFACE_BACKGROUND_INDEX];
  if (STRINGP (bg))
    {
      Lisp_Object def_bg = def_attrs[LFACE_BACKGROUND_INDEX];

      if (face_attr_equal_p (bg, def_bg))
	return 0;		/* same as default */
      else if (! tty_lookup_color (f, bg, &bg_tty_color, &bg_std_color))
	return 0;		/* not a valid color */
      else if (color_distance (&bg_tty_color, &bg_std_color)
	       > TTY_SAME_COLOR_THRESHOLD)
	return 0;		/* displayed color is too different */
      else
	/* Make sure the color is really different than the default.  */
	{
	  XColor def_bg_color;
	  if (tty_lookup_color (f, def_bg, &def_bg_color, 0)
	      && (color_distance (&bg_tty_color, &def_bg_color)
		  <= TTY_SAME_COLOR_THRESHOLD))
	    return 0;
	}
    }

  /* If both foreground and background are requested, see if the
     distance between them is OK.  We just check to see if the distance
     between the tty's foreground and background is close enough to the
     distance between the standard foreground and background.  */
  if (STRINGP (fg) && STRINGP (bg))
    {
      int delta_delta
	= (color_distance (&fg_std_color, &bg_std_color)
	   - color_distance (&fg_tty_color, &bg_tty_color));
      if (delta_delta > TTY_SAME_COLOR_THRESHOLD
	  || delta_delta < -TTY_SAME_COLOR_THRESHOLD)
	return 0;
    }


  /* See if the capabilities we selected above are supported, with the
     given colors.  */
  if (test_caps != 0 &&
      ! tty_capable_p (FRAME_TTY (f), test_caps, fg_tty_color.pixel, bg_tty_color.pixel))
    return 0;


  /* Hmmm, everything checks out, this terminal must support this face.  */
  return 1;
}


DEFUN ("display-supports-face-attributes-p",
       Fdisplay_supports_face_attributes_p, Sdisplay_supports_face_attributes_p,
       1, 2, 0,
       doc: /* Return non-nil if all the face attributes in ATTRIBUTES are supported.
The optional argument DISPLAY can be a display name, a frame, or
nil (meaning the selected frame's display).

The definition of `supported' is somewhat heuristic, but basically means
that a face containing all the attributes in ATTRIBUTES, when merged
with the default face for display, can be represented in a way that's

 \(1) different in appearance than the default face, and
 \(2) `close in spirit' to what the attributes specify, if not exact.

Point (2) implies that a `:weight black' attribute will be satisfied by
any display that can display bold, and a `:foreground \"yellow\"' as long
as it can display a yellowish color, but `:slant italic' will _not_ be
satisfied by the tty display code's automatic substitution of a `dim'
face for italic.  */)
  (Lisp_Object attributes, Lisp_Object display)
{
  int supports = 0, i;
  Lisp_Object frame;
  struct frame *f;
  struct face *def_face;
  Lisp_Object attrs[LFACE_VECTOR_SIZE];

  if (noninteractive || !initialized)
    /* We may not be able to access low-level face information in batch
       mode, or before being dumped, and this function is not going to
       be very useful in those cases anyway, so just give up.  */
    return Qnil;

  if (NILP (display))
    frame = selected_frame;
  else if (FRAMEP (display))
    frame = display;
  else
    {
      /* Find any frame on DISPLAY.  */
      Lisp_Object fl_tail;

      frame = Qnil;
      for (fl_tail = Vframe_list; CONSP (fl_tail); fl_tail = XCDR (fl_tail))
	{
	  frame = XCAR (fl_tail);
	  if (!NILP (Fequal (Fcdr (Fassq (Qdisplay,
					  XFRAME (frame)->param_alist)),
			     display)))
	    break;
	}
    }

  CHECK_LIVE_FRAME (frame);
  f = XFRAME (frame);

  for (i = 0; i < LFACE_VECTOR_SIZE; i++)
    attrs[i] = Qunspecified;
  merge_face_ref (f, attributes, attrs, 1, 0);

  def_face = FACE_FROM_ID (f, DEFAULT_FACE_ID);
  if (def_face == NULL)
    {
      if (! realize_basic_faces (f))
	error ("Cannot realize default face");
      def_face = FACE_FROM_ID (f, DEFAULT_FACE_ID);
      if (def_face == NULL)
	abort ();  /* realize_basic_faces must have set it up  */
    }

  /* Dispatch to the appropriate handler.  */
  if (FRAME_TERMCAP_P (f) || FRAME_MSDOS_P (f))
    supports = tty_supports_face_attributes_p (f, attrs, def_face);
#ifdef HAVE_WINDOW_SYSTEM
  else
    supports = x_supports_face_attributes_p (f, attrs, def_face);
#endif

  return supports ? Qt : Qnil;
}


/***********************************************************************
			    Font selection
 ***********************************************************************/

DEFUN ("internal-set-font-selection-order",
       Finternal_set_font_selection_order,
       Sinternal_set_font_selection_order, 1, 1, 0,
       doc: /* Set font selection order for face font selection to ORDER.
ORDER must be a list of length 4 containing the symbols `:width',
`:height', `:weight', and `:slant'.  Face attributes appearing
first in ORDER are matched first, e.g. if `:height' appears before
`:weight' in ORDER, font selection first tries to find a font with
a suitable height, and then tries to match the font weight.
Value is ORDER.  */)
  (Lisp_Object order)
{
  Lisp_Object list;
  int i;
  int indices[DIM (font_sort_order)];

  CHECK_LIST (order);
  memset (indices, 0, sizeof indices);
  i = 0;

  for (list = order;
       CONSP (list) && i < DIM (indices);
       list = XCDR (list), ++i)
    {
      Lisp_Object attr = XCAR (list);
      int xlfd;

      if (EQ (attr, QCwidth))
	xlfd = XLFD_SWIDTH;
      else if (EQ (attr, QCheight))
	xlfd = XLFD_POINT_SIZE;
      else if (EQ (attr, QCweight))
	xlfd = XLFD_WEIGHT;
      else if (EQ (attr, QCslant))
	xlfd = XLFD_SLANT;
      else
	break;

      if (indices[i] != 0)
	break;
      indices[i] = xlfd;
    }

  if (!NILP (list) || i != DIM (indices))
    signal_error ("Invalid font sort order", order);
  for (i = 0; i < DIM (font_sort_order); ++i)
    if (indices[i] == 0)
      signal_error ("Invalid font sort order", order);

  if (memcmp (indices, font_sort_order, sizeof indices) != 0)
    {
      memcpy (font_sort_order, indices, sizeof font_sort_order);
      free_all_realized_faces (Qnil);
    }

  font_update_sort_order (font_sort_order);

  return Qnil;
}


DEFUN ("internal-set-alternative-font-family-alist",
       Finternal_set_alternative_font_family_alist,
       Sinternal_set_alternative_font_family_alist, 1, 1, 0,
       doc: /* Define alternative font families to try in face font selection.
ALIST is an alist of (FAMILY ALTERNATIVE1 ALTERNATIVE2 ...) entries.
Each ALTERNATIVE is tried in order if no fonts of font family FAMILY can
be found.  Value is ALIST.  */)
  (Lisp_Object alist)
{
  Lisp_Object entry, tail, tail2;

  CHECK_LIST (alist);
  alist = Fcopy_sequence (alist);
  for (tail = alist; CONSP (tail); tail = XCDR (tail))
    {
      entry = XCAR (tail);
      CHECK_LIST (entry);
      entry = Fcopy_sequence (entry);
      XSETCAR (tail, entry);
      for (tail2 = entry; CONSP (tail2); tail2 = XCDR (tail2))
	XSETCAR (tail2, Fintern (XCAR (tail2), Qnil));
    }

  Vface_alternative_font_family_alist = alist;
  free_all_realized_faces (Qnil);
  return alist;
}


DEFUN ("internal-set-alternative-font-registry-alist",
       Finternal_set_alternative_font_registry_alist,
       Sinternal_set_alternative_font_registry_alist, 1, 1, 0,
       doc: /* Define alternative font registries to try in face font selection.
ALIST is an alist of (REGISTRY ALTERNATIVE1 ALTERNATIVE2 ...) entries.
Each ALTERNATIVE is tried in order if no fonts of font registry REGISTRY can
be found.  Value is ALIST.  */)
  (Lisp_Object alist)
{
  Lisp_Object entry, tail, tail2;

  CHECK_LIST (alist);
  alist = Fcopy_sequence (alist);
  for (tail = alist; CONSP (tail); tail = XCDR (tail))
    {
      entry = XCAR (tail);
      CHECK_LIST (entry);
      entry = Fcopy_sequence (entry);
      XSETCAR (tail, entry);
      for (tail2 = entry; CONSP (tail2); tail2 = XCDR (tail2))
	XSETCAR (tail2, Fdowncase (XCAR (tail2)));
    }
  Vface_alternative_font_registry_alist = alist;
  free_all_realized_faces (Qnil);
  return alist;
}


#ifdef HAVE_WINDOW_SYSTEM

/* Ignore the difference of font point size less than this value.  */

#define FONT_POINT_SIZE_QUANTUM 5

/* Return the fontset id of the base fontset name or alias name given
   by the fontset attribute of ATTRS.  Value is -1 if the fontset
   attribute of ATTRS doesn't name a fontset.  */

static int
face_fontset (Lisp_Object *attrs)
{
  Lisp_Object name;

  name = attrs[LFACE_FONTSET_INDEX];
  if (!STRINGP (name))
    return -1;
  return fs_query_fontset (name, 0);
}

#endif /* HAVE_WINDOW_SYSTEM */



/***********************************************************************
			   Face Realization
 ***********************************************************************/

/* Realize basic faces on frame F.  Value is zero if frame parameters
   of F don't contain enough information needed to realize the default
   face.  */

static int
realize_basic_faces (struct frame *f)
{
  int success_p = 0;
  int count = SPECPDL_INDEX ();

  /* Block input here so that we won't be surprised by an X expose
     event, for instance, without having the faces set up.  */
  BLOCK_INPUT;
  specbind (Qscalable_fonts_allowed, Qt);

  if (realize_default_face (f))
    {
      realize_named_face (f, Qmode_line, MODE_LINE_FACE_ID);
      realize_named_face (f, Qmode_line_inactive, MODE_LINE_INACTIVE_FACE_ID);
      realize_named_face (f, Qtool_bar, TOOL_BAR_FACE_ID);
      realize_named_face (f, Qfringe, FRINGE_FACE_ID);
      realize_named_face (f, Qheader_line, HEADER_LINE_FACE_ID);
      realize_named_face (f, Qscroll_bar, SCROLL_BAR_FACE_ID);
      realize_named_face (f, Qborder, BORDER_FACE_ID);
      realize_named_face (f, Qcursor, CURSOR_FACE_ID);
      realize_named_face (f, Qmouse, MOUSE_FACE_ID);
      realize_named_face (f, Qmenu, MENU_FACE_ID);
      realize_named_face (f, Qvertical_border, VERTICAL_BORDER_FACE_ID);

      /* Reflect changes in the `menu' face in menu bars.  */
      if (FRAME_FACE_CACHE (f)->menu_face_changed_p)
	{
	  FRAME_FACE_CACHE (f)->menu_face_changed_p = 0;
#ifdef USE_X_TOOLKIT
          if (FRAME_WINDOW_P (f))
            x_update_menu_appearance (f);
#endif
	}

      success_p = 1;
    }

  unbind_to (count, Qnil);
  UNBLOCK_INPUT;
  return success_p;
}


/* Realize the default face on frame F.  If the face is not fully
   specified, make it fully-specified.  Attributes of the default face
   that are not explicitly specified are taken from frame parameters.  */

static int
realize_default_face (struct frame *f)
{
  struct face_cache *c = FRAME_FACE_CACHE (f);
  Lisp_Object lface;
  Lisp_Object attrs[LFACE_VECTOR_SIZE];
  struct face *face;

  /* If the `default' face is not yet known, create it.  */
  lface = lface_from_face_name (f, Qdefault, 0);
  if (NILP (lface))
  {
       Lisp_Object frame;
       XSETFRAME (frame, f);
       lface = Finternal_make_lisp_face (Qdefault, frame);
  }

#ifdef HAVE_WINDOW_SYSTEM
  if (FRAME_WINDOW_P (f))
    {
      Lisp_Object font_object;

      XSETFONT (font_object, FRAME_FONT (f));
      set_lface_from_font (f, lface, font_object, f->default_face_done_p);
      LFACE_FONTSET (lface) = fontset_name (FRAME_FONTSET (f));
      f->default_face_done_p = 1;
    }
#endif /* HAVE_WINDOW_SYSTEM */

  if (!FRAME_WINDOW_P (f))
    {
      LFACE_FAMILY (lface) = build_string ("default");
      LFACE_FOUNDRY (lface) = LFACE_FAMILY (lface);
      LFACE_SWIDTH (lface) = Qnormal;
      LFACE_HEIGHT (lface) = make_number (1);
      if (UNSPECIFIEDP (LFACE_WEIGHT (lface)))
	LFACE_WEIGHT (lface) = Qnormal;
      if (UNSPECIFIEDP (LFACE_SLANT (lface)))
	LFACE_SLANT (lface) = Qnormal;
      if (UNSPECIFIEDP (LFACE_FONTSET (lface)))
	LFACE_FONTSET (lface) = Qnil;
    }

  if (UNSPECIFIEDP (LFACE_UNDERLINE (lface)))
    LFACE_UNDERLINE (lface) = Qnil;

  if (UNSPECIFIEDP (LFACE_OVERLINE (lface)))
    LFACE_OVERLINE (lface) = Qnil;

  if (UNSPECIFIEDP (LFACE_STRIKE_THROUGH (lface)))
    LFACE_STRIKE_THROUGH (lface) = Qnil;

  if (UNSPECIFIEDP (LFACE_BOX (lface)))
    LFACE_BOX (lface) = Qnil;

  if (UNSPECIFIEDP (LFACE_INVERSE (lface)))
    LFACE_INVERSE (lface) = Qnil;

  if (UNSPECIFIEDP (LFACE_FOREGROUND (lface)))
    {
      /* This function is called so early that colors are not yet
	 set in the frame parameter list.  */
      Lisp_Object color = Fassq (Qforeground_color, f->param_alist);

      if (CONSP (color) && STRINGP (XCDR (color)))
	LFACE_FOREGROUND (lface) = XCDR (color);
      else if (FRAME_WINDOW_P (f))
	return 0;
      else if (FRAME_INITIAL_P (f) || FRAME_TERMCAP_P (f) || FRAME_MSDOS_P (f))
	LFACE_FOREGROUND (lface) = build_string (unspecified_fg);
      else
	abort ();
    }

  if (UNSPECIFIEDP (LFACE_BACKGROUND (lface)))
    {
      /* This function is called so early that colors are not yet
	 set in the frame parameter list.  */
      Lisp_Object color = Fassq (Qbackground_color, f->param_alist);
      if (CONSP (color) && STRINGP (XCDR (color)))
	LFACE_BACKGROUND (lface) = XCDR (color);
      else if (FRAME_WINDOW_P (f))
	return 0;
      else if (FRAME_INITIAL_P (f) || FRAME_TERMCAP_P (f) || FRAME_MSDOS_P (f))
	LFACE_BACKGROUND (lface) = build_string (unspecified_bg);
      else
	abort ();
    }

  if (UNSPECIFIEDP (LFACE_STIPPLE (lface)))
    LFACE_STIPPLE (lface) = Qnil;

  /* Realize the face; it must be fully-specified now.  */
  xassert (lface_fully_specified_p (XVECTOR (lface)->contents));
  check_lface (lface);
  memcpy (attrs, XVECTOR (lface)->contents, sizeof attrs);
  face = realize_face (c, attrs, DEFAULT_FACE_ID);

#ifdef HAVE_WINDOW_SYSTEM
#ifdef HAVE_X_WINDOWS
  if (FRAME_X_P (f) && face->font != FRAME_FONT (f))
    {
      /* This can happen when making a frame on a display that does
 	 not support the default font.  */
      if (!face->font)
 	return 0;

      /* Otherwise, the font specified for the frame was not
 	 acceptable as a font for the default face (perhaps because
 	 auto-scaled fonts are rejected), so we must adjust the frame
 	 font.  */
      x_set_font (f, LFACE_FONT (lface), Qnil);
    }
#endif	/* HAVE_X_WINDOWS */
#endif	/* HAVE_WINDOW_SYSTEM */
  return 1;
}


/* Realize basic faces other than the default face in face cache C.
   SYMBOL is the face name, ID is the face id the realized face must
   have.  The default face must have been realized already.  */

static void
realize_named_face (struct frame *f, Lisp_Object symbol, int id)
{
  struct face_cache *c = FRAME_FACE_CACHE (f);
  Lisp_Object lface = lface_from_face_name (f, symbol, 0);
  Lisp_Object attrs[LFACE_VECTOR_SIZE];
  Lisp_Object symbol_attrs[LFACE_VECTOR_SIZE];
  struct face *new_face;

  /* The default face must exist and be fully specified.  */
  get_lface_attributes_no_remap (f, Qdefault, attrs, 1);
  check_lface_attrs (attrs);
  xassert (lface_fully_specified_p (attrs));

  /* If SYMBOL isn't know as a face, create it.  */
  if (NILP (lface))
    {
      Lisp_Object frame;
      XSETFRAME (frame, f);
      lface = Finternal_make_lisp_face (symbol, frame);
    }

  /* Merge SYMBOL's face with the default face.  */
  get_lface_attributes_no_remap (f, symbol, symbol_attrs, 1);
  merge_face_vectors (f, symbol_attrs, attrs, 0);

  /* Realize the face.  */
  new_face = realize_face (c, attrs, id);
}


/* Realize the fully-specified face with attributes ATTRS in face
   cache CACHE for ASCII characters.  If FORMER_FACE_ID is
   non-negative, it is an ID of face to remove before caching the new
   face.  Value is a pointer to the newly created realized face.  */

static struct face *
realize_face (struct face_cache *cache, Lisp_Object *attrs, int former_face_id)
{
  struct face *face;

  /* LFACE must be fully specified.  */
  xassert (cache != NULL);
  check_lface_attrs (attrs);

  if (former_face_id >= 0 && cache->used > former_face_id)
    {
      /* Remove the former face.  */
      struct face *former_face = cache->faces_by_id[former_face_id];
      uncache_face (cache, former_face);
      free_realized_face (cache->f, former_face);
      SET_FRAME_GARBAGED (cache->f);
    }

  if (FRAME_WINDOW_P (cache->f))
    face = realize_x_face (cache, attrs);
  else if (FRAME_TERMCAP_P (cache->f) || FRAME_MSDOS_P (cache->f))
    face = realize_tty_face (cache, attrs);
  else if (FRAME_INITIAL_P (cache->f))
    {
      /* Create a dummy face. */
      face = make_realized_face (attrs);
    }
  else
    abort ();

  /* Insert the new face.  */
  cache_face (cache, face, lface_hash (attrs));
  return face;
}


#ifdef HAVE_WINDOW_SYSTEM
/* Realize the fully-specified face that uses FONT-OBJECT and has the
   same attributes as BASE_FACE except for the font on frame F.
   FONT-OBJECT may be nil, in which case, realized a face of
   no-font.  */

static struct face *
realize_non_ascii_face (struct frame *f, Lisp_Object font_object, struct face *base_face)
{
  struct face_cache *cache = FRAME_FACE_CACHE (f);
  struct face *face;

  face = (struct face *) xmalloc (sizeof *face);
  *face = *base_face;
  face->gc = 0;
  face->extra = NULL;
  face->overstrike
    = (! NILP (font_object)
       && FONT_WEIGHT_NAME_NUMERIC (face->lface[LFACE_WEIGHT_INDEX]) > 100
       && FONT_WEIGHT_NUMERIC (font_object) <= 100);

  /* Don't try to free the colors copied bitwise from BASE_FACE.  */
  face->colors_copied_bitwise_p = 1;
  face->font = NILP (font_object) ? NULL : XFONT_OBJECT (font_object);
  face->gc = 0;

  cache_face (cache, face, face->hash);

  return face;
}
#endif	/* HAVE_WINDOW_SYSTEM */


/* Realize the fully-specified face with attributes ATTRS in face
   cache CACHE for ASCII characters.  Do it for X frame CACHE->f.  If
   the new face doesn't share font with the default face, a fontname
   is allocated from the heap and set in `font_name' of the new face,
   but it is not yet loaded here.  Value is a pointer to the newly
   created realized face.  */

static struct face *
realize_x_face (struct face_cache *cache, Lisp_Object *attrs)
{
  struct face *face = NULL;
#ifdef HAVE_WINDOW_SYSTEM
  struct face *default_face;
  struct frame *f;
  Lisp_Object stipple, overline, strike_through, box;

  xassert (FRAME_WINDOW_P (cache->f));

  /* Allocate a new realized face.  */
  face = make_realized_face (attrs);
  face->ascii_face = face;

  f = cache->f;

  /* Determine the font to use.  Most of the time, the font will be
     the same as the font of the default face, so try that first.  */
  default_face = FACE_FROM_ID (f, DEFAULT_FACE_ID);
  if (default_face
      && lface_same_font_attributes_p (default_face->lface, attrs))
    {
      face->font = default_face->font;
      face->fontset
	= make_fontset_for_ascii_face (f, default_face->fontset, face);
    }
  else
    {
      /* If the face attribute ATTRS specifies a fontset, use it as
	 the base of a new realized fontset.  Otherwise, use the same
	 base fontset as of the default face.  The base determines
	 registry and encoding of a font.  It may also determine
	 foundry and family.  The other fields of font name pattern
	 are constructed from ATTRS.  */
      int fontset = face_fontset (attrs);

      /* If we are realizing the default face, ATTRS should specify a
	 fontset.  In other words, if FONTSET is -1, we are not
	 realizing the default face, thus the default face should have
	 already been realized.  */
      if (fontset == -1)
	{
	  if (default_face)
	    fontset = default_face->fontset;
	  if (fontset == -1)
	    abort ();
	}
      if (! FONT_OBJECT_P (attrs[LFACE_FONT_INDEX]))
	attrs[LFACE_FONT_INDEX]
	  = font_load_for_lface (f, attrs, attrs[LFACE_FONT_INDEX]);
      if (FONT_OBJECT_P (attrs[LFACE_FONT_INDEX]))
	{
	  face->font = XFONT_OBJECT (attrs[LFACE_FONT_INDEX]);
	  face->fontset = make_fontset_for_ascii_face (f, fontset, face);
	}
      else
	{
	  face->font = NULL;
	  face->fontset = -1;
	}
    }

  if (face->font
      && FONT_WEIGHT_NAME_NUMERIC (attrs[LFACE_WEIGHT_INDEX]) > 100
      && FONT_WEIGHT_NUMERIC (attrs[LFACE_FONT_INDEX]) <= 100)
    face->overstrike = 1;

  /* Load colors, and set remaining attributes.  */

  load_face_colors (f, face, attrs);

  /* Set up box.  */
  box = attrs[LFACE_BOX_INDEX];
  if (STRINGP (box))
    {
      /* A simple box of line width 1 drawn in color given by
	 the string.  */
      face->box_color = load_color (f, face, attrs[LFACE_BOX_INDEX],
				    LFACE_BOX_INDEX);
      face->box = FACE_SIMPLE_BOX;
      face->box_line_width = 1;
    }
  else if (INTEGERP (box))
    {
      /* Simple box of specified line width in foreground color of the
         face.  */
      xassert (XINT (box) != 0);
      face->box = FACE_SIMPLE_BOX;
      face->box_line_width = XINT (box);
      face->box_color = face->foreground;
      face->box_color_defaulted_p = 1;
    }
  else if (CONSP (box))
    {
      /* `(:width WIDTH :color COLOR :shadow SHADOW)'.  SHADOW
	 being one of `raised' or `sunken'.  */
      face->box = FACE_SIMPLE_BOX;
      face->box_color = face->foreground;
      face->box_color_defaulted_p = 1;
      face->box_line_width = 1;

      while (CONSP (box))
	{
	  Lisp_Object keyword, value;

	  keyword = XCAR (box);
	  box = XCDR (box);

	  if (!CONSP (box))
	    break;
	  value = XCAR (box);
	  box = XCDR (box);

	  if (EQ (keyword, QCline_width))
	    {
	      if (INTEGERP (value) && XINT (value) != 0)
		face->box_line_width = XINT (value);
	    }
	  else if (EQ (keyword, QCcolor))
	    {
	      if (STRINGP (value))
		{
		  face->box_color = load_color (f, face, value,
						LFACE_BOX_INDEX);
		  face->use_box_color_for_shadows_p = 1;
		}
	    }
	  else if (EQ (keyword, QCstyle))
	    {
	      if (EQ (value, Qreleased_button))
		face->box = FACE_RAISED_BOX;
	      else if (EQ (value, Qpressed_button))
		face->box = FACE_SUNKEN_BOX;
	    }
	}
    }

  /* Text underline, overline, strike-through.  */

  if (EQ (attrs[LFACE_UNDERLINE_INDEX], Qt))
    {
      /* Use default color (same as foreground color).  */
      face->underline_p = 1;
      face->underline_defaulted_p = 1;
      face->underline_color = 0;
    }
  else if (STRINGP (attrs[LFACE_UNDERLINE_INDEX]))
    {
      /* Use specified color.  */
      face->underline_p = 1;
      face->underline_defaulted_p = 0;
      face->underline_color
	= load_color (f, face, attrs[LFACE_UNDERLINE_INDEX],
		      LFACE_UNDERLINE_INDEX);
    }
  else if (NILP (attrs[LFACE_UNDERLINE_INDEX]))
    {
      face->underline_p = 0;
      face->underline_defaulted_p = 0;
      face->underline_color = 0;
    }

  overline = attrs[LFACE_OVERLINE_INDEX];
  if (STRINGP (overline))
    {
      face->overline_color
	= load_color (f, face, attrs[LFACE_OVERLINE_INDEX],
		      LFACE_OVERLINE_INDEX);
      face->overline_p = 1;
    }
  else if (EQ (overline, Qt))
    {
      face->overline_color = face->foreground;
      face->overline_color_defaulted_p = 1;
      face->overline_p = 1;
    }

  strike_through = attrs[LFACE_STRIKE_THROUGH_INDEX];
  if (STRINGP (strike_through))
    {
      face->strike_through_color
	= load_color (f, face, attrs[LFACE_STRIKE_THROUGH_INDEX],
		      LFACE_STRIKE_THROUGH_INDEX);
      face->strike_through_p = 1;
    }
  else if (EQ (strike_through, Qt))
    {
      face->strike_through_color = face->foreground;
      face->strike_through_color_defaulted_p = 1;
      face->strike_through_p = 1;
    }

  stipple = attrs[LFACE_STIPPLE_INDEX];
  if (!NILP (stipple))
    face->stipple = load_pixmap (f, stipple, &face->pixmap_w, &face->pixmap_h);
#endif /* HAVE_WINDOW_SYSTEM */

  return face;
}


/* Map a specified color of face FACE on frame F to a tty color index.
   IDX is either LFACE_FOREGROUND_INDEX or LFACE_BACKGROUND_INDEX, and
   specifies which color to map.  Set *DEFAULTED to 1 if mapping to the
   default foreground/background colors.  */

static void
map_tty_color (struct frame *f, struct face *face, enum lface_attribute_index idx, int *defaulted)
{
  Lisp_Object frame, color, def;
  int foreground_p = idx == LFACE_FOREGROUND_INDEX;
  unsigned long default_pixel, default_other_pixel, pixel;

  xassert (idx == LFACE_FOREGROUND_INDEX || idx == LFACE_BACKGROUND_INDEX);

  if (foreground_p)
    {
      pixel = default_pixel = FACE_TTY_DEFAULT_FG_COLOR;
      default_other_pixel = FACE_TTY_DEFAULT_BG_COLOR;
    }
  else
    {
      pixel = default_pixel = FACE_TTY_DEFAULT_BG_COLOR;
      default_other_pixel = FACE_TTY_DEFAULT_FG_COLOR;
    }

  XSETFRAME (frame, f);
  color = face->lface[idx];

  if (STRINGP (color)
      && SCHARS (color)
      && CONSP (Vtty_defined_color_alist)
      && (def = assq_no_quit (color, call1 (Qtty_color_alist, frame)),
	  CONSP (def)))
    {
      /* Associations in tty-defined-color-alist are of the form
	 (NAME INDEX R G B).  We need the INDEX part.  */
      pixel = XINT (XCAR (XCDR (def)));
    }

  if (pixel == default_pixel && STRINGP (color))
    {
      pixel = load_color (f, face, color, idx);

#ifdef MSDOS
      /* If the foreground of the default face is the default color,
	 use the foreground color defined by the frame.  */
      if (FRAME_MSDOS_P (f))
	{
	  if (pixel == default_pixel
	      || pixel == FACE_TTY_DEFAULT_COLOR)
	    {
	      if (foreground_p)
		pixel = FRAME_FOREGROUND_PIXEL (f);
	      else
		pixel = FRAME_BACKGROUND_PIXEL (f);
	      face->lface[idx] = tty_color_name (f, pixel);
	      *defaulted = 1;
	    }
	  else if (pixel == default_other_pixel)
	    {
	      if (foreground_p)
		pixel = FRAME_BACKGROUND_PIXEL (f);
	      else
		pixel = FRAME_FOREGROUND_PIXEL (f);
	      face->lface[idx] = tty_color_name (f, pixel);
	      *defaulted = 1;
	    }
        }
#endif /* MSDOS */
    }

  if (foreground_p)
    face->foreground = pixel;
  else
    face->background = pixel;
}


/* Realize the fully-specified face with attributes ATTRS in face
   cache CACHE for ASCII characters.  Do it for TTY frame CACHE->f.
   Value is a pointer to the newly created realized face.  */

static struct face *
realize_tty_face (struct face_cache *cache, Lisp_Object *attrs)
{
  struct face *face;
  int weight, slant;
  int face_colors_defaulted = 0;
  struct frame *f = cache->f;

  /* Frame must be a termcap frame.  */
  xassert (FRAME_TERMCAP_P (cache->f) || FRAME_MSDOS_P (cache->f));

  /* Allocate a new realized face.  */
  face = make_realized_face (attrs);
#if 0
  face->font_name = FRAME_MSDOS_P (cache->f) ? "ms-dos" : "tty";
#endif

  /* Map face attributes to TTY appearances.  We map slant to
     dimmed text because we want italic text to appear differently
     and because dimmed text is probably used infrequently.  */
  weight = FONT_WEIGHT_NAME_NUMERIC (attrs[LFACE_WEIGHT_INDEX]);
  slant = FONT_SLANT_NAME_NUMERIC (attrs[LFACE_SLANT_INDEX]);
  if (weight > 100)
    face->tty_bold_p = 1;
  if (weight < 100 || slant != 100)
    face->tty_dim_p = 1;
  if (!NILP (attrs[LFACE_UNDERLINE_INDEX]))
    face->tty_underline_p = 1;
  if (!NILP (attrs[LFACE_INVERSE_INDEX]))
    face->tty_reverse_p = 1;

  /* Map color names to color indices.  */
  map_tty_color (f, face, LFACE_FOREGROUND_INDEX, &face_colors_defaulted);
  map_tty_color (f, face, LFACE_BACKGROUND_INDEX, &face_colors_defaulted);

  /* Swap colors if face is inverse-video.  If the colors are taken
     from the frame colors, they are already inverted, since the
     frame-creation function calls x-handle-reverse-video.  */
  if (face->tty_reverse_p && !face_colors_defaulted)
    {
      unsigned long tem = face->foreground;
      face->foreground = face->background;
      face->background = tem;
    }

  if (tty_suppress_bold_inverse_default_colors_p
      && face->tty_bold_p
      && face->background == FACE_TTY_DEFAULT_FG_COLOR
      && face->foreground == FACE_TTY_DEFAULT_BG_COLOR)
    face->tty_bold_p = 0;

  return face;
}


DEFUN ("tty-suppress-bold-inverse-default-colors",
       Ftty_suppress_bold_inverse_default_colors,
       Stty_suppress_bold_inverse_default_colors, 1, 1, 0,
       doc: /* Suppress/allow boldness of faces with inverse default colors.
SUPPRESS non-nil means suppress it.
This affects bold faces on TTYs whose foreground is the default background
color of the display and whose background is the default foreground color.
For such faces, the bold face attribute is ignored if this variable
is non-nil.  */)
  (Lisp_Object suppress)
{
  tty_suppress_bold_inverse_default_colors_p = !NILP (suppress);
  ++face_change_count;
  return suppress;
}



/***********************************************************************
			   Computing Faces
 ***********************************************************************/

/* Return the ID of the face to use to display character CH with face
   property PROP on frame F in current_buffer.  */

int
compute_char_face (struct frame *f, int ch, Lisp_Object prop)
{
  int face_id;

  if (NILP (current_buffer->enable_multibyte_characters))
    ch = 0;

  if (NILP (prop))
    {
      struct face *face = FACE_FROM_ID (f, DEFAULT_FACE_ID);
      face_id = FACE_FOR_CHAR (f, face, ch, -1, Qnil);
    }
  else
    {
      Lisp_Object attrs[LFACE_VECTOR_SIZE];
      struct face *default_face = FACE_FROM_ID (f, DEFAULT_FACE_ID);
      memcpy (attrs, default_face->lface, sizeof attrs);
      merge_face_ref (f, prop, attrs, 1, 0);
      face_id = lookup_face (f, attrs);
    }

  return face_id;
}

/* Return the face ID associated with buffer position POS for
   displaying ASCII characters.  Return in *ENDPTR the position at
   which a different face is needed, as far as text properties and
   overlays are concerned.  W is a window displaying current_buffer.

   REGION_BEG, REGION_END delimit the region, so it can be
   highlighted.

   LIMIT is a position not to scan beyond.  That is to limit the time
   this function can take.

   If MOUSE is non-zero, use the character's mouse-face, not its face.

   BASE_FACE_ID, if non-negative, specifies a base face id to use
   instead of DEFAULT_FACE_ID.

   The face returned is suitable for displaying ASCII characters.  */

int
face_at_buffer_position (struct window *w, EMACS_INT pos,
			 EMACS_INT region_beg, EMACS_INT region_end,
			 EMACS_INT *endptr, EMACS_INT limit,
			 int mouse, int base_face_id)
{
  struct frame *f = XFRAME (w->frame);
  Lisp_Object attrs[LFACE_VECTOR_SIZE];
  Lisp_Object prop, position;
  int i, noverlays;
  Lisp_Object *overlay_vec;
  Lisp_Object frame;
  EMACS_INT endpos;
  Lisp_Object propname = mouse ? Qmouse_face : Qface;
  Lisp_Object limit1, end;
  struct face *default_face;

  /* W must display the current buffer.  We could write this function
     to use the frame and buffer of W, but right now it doesn't.  */
  /* xassert (XBUFFER (w->buffer) == current_buffer); */

  XSETFRAME (frame, f);
  XSETFASTINT (position, pos);

  endpos = ZV;
  if (pos < region_beg && region_beg < endpos)
    endpos = region_beg;

  /* Get the `face' or `mouse_face' text property at POS, and
     determine the next position at which the property changes.  */
  prop = Fget_text_property (position, propname, w->buffer);
  XSETFASTINT (limit1, (limit < endpos ? limit : endpos));
  end = Fnext_single_property_change (position, propname, w->buffer, limit1);
  if (INTEGERP (end))
    endpos = XINT (end);

  /* Look at properties from overlays.  */
  {
    EMACS_INT next_overlay;

    GET_OVERLAYS_AT (pos, overlay_vec, noverlays, &next_overlay, 0);
    if (next_overlay < endpos)
      endpos = next_overlay;
  }

  *endptr = endpos;

  default_face = FACE_FROM_ID (f, base_face_id >= 0 ? base_face_id
			       : NILP (Vface_remapping_alist) ? DEFAULT_FACE_ID
			       : lookup_basic_face (f, DEFAULT_FACE_ID));

  /* Optimize common cases where we can use the default face.  */
  if (noverlays == 0
      && NILP (prop)
      && !(pos >= region_beg && pos < region_end))
    return default_face->id;

  /* Begin with attributes from the default face.  */
  memcpy (attrs, default_face->lface, sizeof attrs);

  /* Merge in attributes specified via text properties.  */
  if (!NILP (prop))
    merge_face_ref (f, prop, attrs, 1, 0);

  /* Now merge the overlay data.  */
  noverlays = sort_overlays (overlay_vec, noverlays, w);
  for (i = 0; i < noverlays; i++)
    {
      Lisp_Object oend;
      int oendpos;

      prop = Foverlay_get (overlay_vec[i], propname);
      if (!NILP (prop))
	merge_face_ref (f, prop, attrs, 1, 0);

      oend = OVERLAY_END (overlay_vec[i]);
      oendpos = OVERLAY_POSITION (oend);
      if (oendpos < endpos)
	endpos = oendpos;
    }

  /* If in the region, merge in the region face.  */
  if (pos >= region_beg && pos < region_end)
    {
      merge_named_face (f, Qregion, attrs, 0);

      if (region_end < endpos)
	endpos = region_end;
    }

  *endptr = endpos;

  /* Look up a realized face with the given face attributes,
     or realize a new one for ASCII characters.  */
  return lookup_face (f, attrs);
}

/* Return the face ID at buffer position POS for displaying ASCII
   characters associated with overlay strings for overlay OVERLAY.

   Like face_at_buffer_position except for OVERLAY.  Currently it
   simply disregards the `face' properties of all overlays.  */

int
face_for_overlay_string (struct window *w, EMACS_INT pos,
			 EMACS_INT region_beg, EMACS_INT region_end,
			 EMACS_INT *endptr, EMACS_INT limit,
			 int mouse, Lisp_Object overlay)
{
  struct frame *f = XFRAME (w->frame);
  Lisp_Object attrs[LFACE_VECTOR_SIZE];
  Lisp_Object prop, position;
  Lisp_Object frame;
  int endpos;
  Lisp_Object propname = mouse ? Qmouse_face : Qface;
  Lisp_Object limit1, end;
  struct face *default_face;

  /* W must display the current buffer.  We could write this function
     to use the frame and buffer of W, but right now it doesn't.  */
  /* xassert (XBUFFER (w->buffer) == current_buffer); */

  XSETFRAME (frame, f);
  XSETFASTINT (position, pos);

  endpos = ZV;
  if (pos < region_beg && region_beg < endpos)
    endpos = region_beg;

  /* Get the `face' or `mouse_face' text property at POS, and
     determine the next position at which the property changes.  */
  prop = Fget_text_property (position, propname, w->buffer);
  XSETFASTINT (limit1, (limit < endpos ? limit : endpos));
  end = Fnext_single_property_change (position, propname, w->buffer, limit1);
  if (INTEGERP (end))
    endpos = XINT (end);

  *endptr = endpos;

  default_face = FACE_FROM_ID (f, DEFAULT_FACE_ID);

  /* Optimize common cases where we can use the default face.  */
  if (NILP (prop)
      && !(pos >= region_beg && pos < region_end))
    return DEFAULT_FACE_ID;

  /* Begin with attributes from the default face.  */
  memcpy (attrs, default_face->lface, sizeof attrs);

  /* Merge in attributes specified via text properties.  */
  if (!NILP (prop))
    merge_face_ref (f, prop, attrs, 1, 0);

  /* If in the region, merge in the region face.  */
  if (pos >= region_beg && pos < region_end)
    {
      merge_named_face (f, Qregion, attrs, 0);

      if (region_end < endpos)
	endpos = region_end;
    }

  *endptr = endpos;

  /* Look up a realized face with the given face attributes,
     or realize a new one for ASCII characters.  */
  return lookup_face (f, attrs);
}


/* Compute the face at character position POS in Lisp string STRING on
   window W, for ASCII characters.

   If STRING is an overlay string, it comes from position BUFPOS in
   current_buffer, otherwise BUFPOS is zero to indicate that STRING is
   not an overlay string.  W must display the current buffer.
   REGION_BEG and REGION_END give the start and end positions of the
   region; both are -1 if no region is visible.

   BASE_FACE_ID is the id of a face to merge with.  For strings coming
   from overlays or the `display' property it is the face at BUFPOS.

   If MOUSE_P is non-zero, use the character's mouse-face, not its face.

   Set *ENDPTR to the next position where to check for faces in
   STRING; -1 if the face is constant from POS to the end of the
   string.

   Value is the id of the face to use.  The face returned is suitable
   for displaying ASCII characters.  */

int
face_at_string_position (struct window *w, Lisp_Object string,
			 EMACS_INT pos, EMACS_INT bufpos,
			 EMACS_INT region_beg, EMACS_INT region_end,
			 EMACS_INT *endptr, enum face_id base_face_id,
			 int mouse_p)
{
  Lisp_Object prop, position, end, limit;
  struct frame *f = XFRAME (WINDOW_FRAME (w));
  Lisp_Object attrs[LFACE_VECTOR_SIZE];
  struct face *base_face;
  int multibyte_p = STRING_MULTIBYTE (string);
  Lisp_Object prop_name = mouse_p ? Qmouse_face : Qface;

  /* Get the value of the face property at the current position within
     STRING.  Value is nil if there is no face property.  */
  XSETFASTINT (position, pos);
  prop = Fget_text_property (position, prop_name, string);

  /* Get the next position at which to check for faces.  Value of end
     is nil if face is constant all the way to the end of the string.
     Otherwise it is a string position where to check faces next.
     Limit is the maximum position up to which to check for property
     changes in Fnext_single_property_change.  Strings are usually
     short, so set the limit to the end of the string.  */
  XSETFASTINT (limit, SCHARS (string));
  end = Fnext_single_property_change (position, prop_name, string, limit);
  if (INTEGERP (end))
    *endptr = XFASTINT (end);
  else
    *endptr = -1;

  base_face = FACE_FROM_ID (f, base_face_id);
  xassert (base_face);

  /* Optimize the default case that there is no face property and we
     are not in the region.  */
  if (NILP (prop)
      && (base_face_id != DEFAULT_FACE_ID
	  /* BUFPOS <= 0 means STRING is not an overlay string, so
	     that the region doesn't have to be taken into account.  */
	  || bufpos <= 0
	  || bufpos < region_beg
	  || bufpos >= region_end)
      && (multibyte_p
	  /* We can't realize faces for different charsets differently
	     if we don't have fonts, so we can stop here if not working
	     on a window-system frame.  */
	  || !FRAME_WINDOW_P (f)
	  || FACE_SUITABLE_FOR_CHAR_P (base_face, 0)))
    return base_face->id;

  /* Begin with attributes from the base face.  */
  memcpy (attrs, base_face->lface, sizeof attrs);

  /* Merge in attributes specified via text properties.  */
  if (!NILP (prop))
    merge_face_ref (f, prop, attrs, 1, 0);

  /* If in the region, merge in the region face.  */
  if (bufpos
      && bufpos >= region_beg
      && bufpos < region_end)
    merge_named_face (f, Qregion, attrs, 0);

  /* Look up a realized face with the given face attributes,
     or realize a new one for ASCII characters.  */
  return lookup_face (f, attrs);
}


/* Merge a face into a realized face.

   F is frame where faces are (to be) realized.

   FACE_NAME is named face to merge.

   If FACE_NAME is nil, FACE_ID is face_id of realized face to merge.

   If FACE_NAME is t, FACE_ID is lface_id of face to merge.

   BASE_FACE_ID is realized face to merge into.

   Return new face id.
*/

int
merge_faces (struct frame *f, Lisp_Object face_name, int face_id, int base_face_id)
{
  Lisp_Object attrs[LFACE_VECTOR_SIZE];
  struct face *base_face;

  base_face = FACE_FROM_ID (f, base_face_id);
  if (!base_face)
    return base_face_id;

  if (EQ (face_name, Qt))
    {
      if (face_id < 0 || face_id >= lface_id_to_name_size)
	return base_face_id;
      face_name = lface_id_to_name[face_id];
      /* When called during make-frame, lookup_derived_face may fail
	 if the faces are uninitialized.  Don't signal an error.  */
      face_id = lookup_derived_face (f, face_name, base_face_id, 0);
      return (face_id >= 0 ? face_id : base_face_id);
    }

  /* Begin with attributes from the base face.  */
  memcpy (attrs, base_face->lface, sizeof attrs);

  if (!NILP (face_name))
    {
      if (!merge_named_face (f, face_name, attrs, 0))
	return base_face_id;
    }
  else
    {
      struct face *face;
      if (face_id < 0)
	return base_face_id;
      face = FACE_FROM_ID (f, face_id);
      if (!face)
	return base_face_id;
      merge_face_vectors (f, face->lface, attrs, 0);
    }

  /* Look up a realized face with the given face attributes,
     or realize a new one for ASCII characters.  */
  return lookup_face (f, attrs);
}



#ifndef HAVE_X_WINDOWS
DEFUN ("x-load-color-file", Fx_load_color_file,
       Sx_load_color_file, 1, 1, 0,
       doc: /* Create an alist of color entries from an external file.

The file should define one named RGB color per line like so:
  R G B   name
where R,G,B are numbers between 0 and 255 and name is an arbitrary string.  */)
  (Lisp_Object filename)
{
  FILE *fp;
  Lisp_Object cmap = Qnil;
  Lisp_Object abspath;

  CHECK_STRING (filename);
  abspath = Fexpand_file_name (filename, Qnil);

  fp = fopen (SDATA (filename), "rt");
  if (fp)
    {
      char buf[512];
      int red, green, blue;
      int num;

      BLOCK_INPUT;

      while (fgets (buf, sizeof (buf), fp) != NULL) {
	if (sscanf (buf, "%u %u %u %n", &red, &green, &blue, &num) == 3)
	  {
	    char *name = buf + num;
	    num = strlen (name) - 1;
	    if (num >= 0 && name[num] == '\n')
	      name[num] = 0;
	    cmap = Fcons (Fcons (build_string (name),
#ifdef WINDOWSNT
				 make_number (RGB (red, green, blue))),
#else
				 make_number ((red << 16) | (green << 8) | blue)),
#endif
			  cmap);
	  }
      }
      fclose (fp);

      UNBLOCK_INPUT;
    }

  return cmap;
}
#endif


/***********************************************************************
				Tests
 ***********************************************************************/

#if GLYPH_DEBUG

/* Print the contents of the realized face FACE to stderr.  */

static void
dump_realized_face (face)
     struct face *face;
{
  fprintf (stderr, "ID: %d\n", face->id);
#ifdef HAVE_X_WINDOWS
  fprintf (stderr, "gc: %ld\n", (long) face->gc);
#endif
  fprintf (stderr, "foreground: 0x%lx (%s)\n",
	   face->foreground,
	   SDATA (face->lface[LFACE_FOREGROUND_INDEX]));
  fprintf (stderr, "background: 0x%lx (%s)\n",
	   face->background,
	   SDATA (face->lface[LFACE_BACKGROUND_INDEX]));
  if (face->font)
    fprintf (stderr, "font_name: %s (%s)\n",
	     SDATA (face->font->props[FONT_NAME_INDEX]),
	     SDATA (face->lface[LFACE_FAMILY_INDEX]));
#ifdef HAVE_X_WINDOWS
  fprintf (stderr, "font = %p\n", face->font);
#endif
  fprintf (stderr, "fontset: %d\n", face->fontset);
  fprintf (stderr, "underline: %d (%s)\n",
	   face->underline_p,
	   SDATA (Fsymbol_name (face->lface[LFACE_UNDERLINE_INDEX])));
  fprintf (stderr, "hash: %d\n", face->hash);
}


DEFUN ("dump-face", Fdump_face, Sdump_face, 0, 1, 0, doc: /* */)
  (Lisp_Object n)
{
  if (NILP (n))
    {
      int i;

      fprintf (stderr, "font selection order: ");
      for (i = 0; i < DIM (font_sort_order); ++i)
	fprintf (stderr, "%d ", font_sort_order[i]);
      fprintf (stderr, "\n");

      fprintf (stderr, "alternative fonts: ");
      debug_print (Vface_alternative_font_family_alist);
      fprintf (stderr, "\n");

      for (i = 0; i < FRAME_FACE_CACHE (SELECTED_FRAME ())->used; ++i)
	Fdump_face (make_number (i));
    }
  else
    {
      struct face *face;
      CHECK_NUMBER (n);
      face = FACE_FROM_ID (SELECTED_FRAME (), XINT (n));
      if (face == NULL)
	error ("Not a valid face");
      dump_realized_face (face);
    }

  return Qnil;
}


DEFUN ("show-face-resources", Fshow_face_resources, Sshow_face_resources,
       0, 0, 0, doc: /* */)
  (void)
{
  fprintf (stderr, "number of colors = %d\n", ncolors_allocated);
  fprintf (stderr, "number of pixmaps = %d\n", npixmaps_allocated);
  fprintf (stderr, "number of GCs = %d\n", ngcs);
  return Qnil;
}

#endif /* GLYPH_DEBUG != 0 */



/***********************************************************************
			    Initialization
 ***********************************************************************/

void
syms_of_xfaces (void)
{
  Qface = intern_c_string ("face");
  staticpro (&Qface);
  Qface_no_inherit = intern_c_string ("face-no-inherit");
  staticpro (&Qface_no_inherit);
  Qbitmap_spec_p = intern_c_string ("bitmap-spec-p");
  staticpro (&Qbitmap_spec_p);
  Qframe_set_background_mode = intern_c_string ("frame-set-background-mode");
  staticpro (&Qframe_set_background_mode);

  /* Lisp face attribute keywords.  */
  QCfamily = intern_c_string (":family");
  staticpro (&QCfamily);
  QCheight = intern_c_string (":height");
  staticpro (&QCheight);
  QCweight = intern_c_string (":weight");
  staticpro (&QCweight);
  QCslant = intern_c_string (":slant");
  staticpro (&QCslant);
  QCunderline = intern_c_string (":underline");
  staticpro (&QCunderline);
  QCinverse_video = intern_c_string (":inverse-video");
  staticpro (&QCinverse_video);
  QCreverse_video = intern_c_string (":reverse-video");
  staticpro (&QCreverse_video);
  QCforeground = intern_c_string (":foreground");
  staticpro (&QCforeground);
  QCbackground = intern_c_string (":background");
  staticpro (&QCbackground);
  QCstipple = intern_c_string (":stipple");
  staticpro (&QCstipple);
  QCwidth = intern_c_string (":width");
  staticpro (&QCwidth);
  QCfont = intern_c_string (":font");
  staticpro (&QCfont);
  QCfontset = intern_c_string (":fontset");
  staticpro (&QCfontset);
  QCbold = intern_c_string (":bold");
  staticpro (&QCbold);
  QCitalic = intern_c_string (":italic");
  staticpro (&QCitalic);
  QCoverline = intern_c_string (":overline");
  staticpro (&QCoverline);
  QCstrike_through = intern_c_string (":strike-through");
  staticpro (&QCstrike_through);
  QCbox = intern_c_string (":box");
  staticpro (&QCbox);
  QCinherit = intern_c_string (":inherit");
  staticpro (&QCinherit);

  /* Symbols used for Lisp face attribute values.  */
  QCcolor = intern_c_string (":color");
  staticpro (&QCcolor);
  QCline_width = intern_c_string (":line-width");
  staticpro (&QCline_width);
  QCstyle = intern_c_string (":style");
  staticpro (&QCstyle);
  Qreleased_button = intern_c_string ("released-button");
  staticpro (&Qreleased_button);
  Qpressed_button = intern_c_string ("pressed-button");
  staticpro (&Qpressed_button);
  Qnormal = intern_c_string ("normal");
  staticpro (&Qnormal);
  Qultra_light = intern_c_string ("ultra-light");
  staticpro (&Qultra_light);
  Qextra_light = intern_c_string ("extra-light");
  staticpro (&Qextra_light);
  Qlight = intern_c_string ("light");
  staticpro (&Qlight);
  Qsemi_light = intern_c_string ("semi-light");
  staticpro (&Qsemi_light);
  Qsemi_bold = intern_c_string ("semi-bold");
  staticpro (&Qsemi_bold);
  Qbold = intern_c_string ("bold");
  staticpro (&Qbold);
  Qextra_bold = intern_c_string ("extra-bold");
  staticpro (&Qextra_bold);
  Qultra_bold = intern_c_string ("ultra-bold");
  staticpro (&Qultra_bold);
  Qoblique = intern_c_string ("oblique");
  staticpro (&Qoblique);
  Qitalic = intern_c_string ("italic");
  staticpro (&Qitalic);
  Qreverse_oblique = intern_c_string ("reverse-oblique");
  staticpro (&Qreverse_oblique);
  Qreverse_italic = intern_c_string ("reverse-italic");
  staticpro (&Qreverse_italic);
  Qultra_condensed = intern_c_string ("ultra-condensed");
  staticpro (&Qultra_condensed);
  Qextra_condensed = intern_c_string ("extra-condensed");
  staticpro (&Qextra_condensed);
  Qcondensed = intern_c_string ("condensed");
  staticpro (&Qcondensed);
  Qsemi_condensed = intern_c_string ("semi-condensed");
  staticpro (&Qsemi_condensed);
  Qsemi_expanded = intern_c_string ("semi-expanded");
  staticpro (&Qsemi_expanded);
  Qexpanded = intern_c_string ("expanded");
  staticpro (&Qexpanded);
  Qextra_expanded = intern_c_string ("extra-expanded");
  staticpro (&Qextra_expanded);
  Qultra_expanded = intern_c_string ("ultra-expanded");
  staticpro (&Qultra_expanded);
  Qbackground_color = intern_c_string ("background-color");
  staticpro (&Qbackground_color);
  Qforeground_color = intern_c_string ("foreground-color");
  staticpro (&Qforeground_color);
  Qunspecified = intern_c_string ("unspecified");
  staticpro (&Qunspecified);
  Qignore_defface = intern_c_string (":ignore-defface");
  staticpro (&Qignore_defface);

  Qface_alias = intern_c_string ("face-alias");
  staticpro (&Qface_alias);
  Qdefault = intern_c_string ("default");
  staticpro (&Qdefault);
  Qtool_bar = intern_c_string ("tool-bar");
  staticpro (&Qtool_bar);
  Qregion = intern_c_string ("region");
  staticpro (&Qregion);
  Qfringe = intern_c_string ("fringe");
  staticpro (&Qfringe);
  Qheader_line = intern_c_string ("header-line");
  staticpro (&Qheader_line);
  Qscroll_bar = intern_c_string ("scroll-bar");
  staticpro (&Qscroll_bar);
  Qmenu = intern_c_string ("menu");
  staticpro (&Qmenu);
  Qcursor = intern_c_string ("cursor");
  staticpro (&Qcursor);
  Qborder = intern_c_string ("border");
  staticpro (&Qborder);
  Qmouse = intern_c_string ("mouse");
  staticpro (&Qmouse);
  Qmode_line_inactive = intern_c_string ("mode-line-inactive");
  staticpro (&Qmode_line_inactive);
  Qvertical_border = intern_c_string ("vertical-border");
  staticpro (&Qvertical_border);
  Qtty_color_desc = intern_c_string ("tty-color-desc");
  staticpro (&Qtty_color_desc);
  Qtty_color_standard_values = intern_c_string ("tty-color-standard-values");
  staticpro (&Qtty_color_standard_values);
  Qtty_color_by_index = intern_c_string ("tty-color-by-index");
  staticpro (&Qtty_color_by_index);
  Qtty_color_alist = intern_c_string ("tty-color-alist");
  staticpro (&Qtty_color_alist);
  Qscalable_fonts_allowed = intern_c_string ("scalable-fonts-allowed");
  staticpro (&Qscalable_fonts_allowed);

  Vparam_value_alist = Fcons (Fcons (Qnil, Qnil), Qnil);
  staticpro (&Vparam_value_alist);
  Vface_alternative_font_family_alist = Qnil;
  staticpro (&Vface_alternative_font_family_alist);
  Vface_alternative_font_registry_alist = Qnil;
  staticpro (&Vface_alternative_font_registry_alist);

  defsubr (&Sinternal_make_lisp_face);
  defsubr (&Sinternal_lisp_face_p);
  defsubr (&Sinternal_set_lisp_face_attribute);
#ifdef HAVE_WINDOW_SYSTEM
  defsubr (&Sinternal_set_lisp_face_attribute_from_resource);
#endif
  defsubr (&Scolor_gray_p);
  defsubr (&Scolor_supported_p);
#ifndef HAVE_X_WINDOWS
  defsubr (&Sx_load_color_file);
#endif
  defsubr (&Sface_attribute_relative_p);
  defsubr (&Smerge_face_attribute);
  defsubr (&Sinternal_get_lisp_face_attribute);
  defsubr (&Sinternal_lisp_face_attribute_values);
  defsubr (&Sinternal_lisp_face_equal_p);
  defsubr (&Sinternal_lisp_face_empty_p);
  defsubr (&Sinternal_copy_lisp_face);
  defsubr (&Sinternal_merge_in_global_face);
  defsubr (&Sface_font);
  defsubr (&Sframe_face_alist);
  defsubr (&Sdisplay_supports_face_attributes_p);
  defsubr (&Scolor_distance);
  defsubr (&Sinternal_set_font_selection_order);
  defsubr (&Sinternal_set_alternative_font_family_alist);
  defsubr (&Sinternal_set_alternative_font_registry_alist);
  defsubr (&Sface_attributes_as_vector);
#if GLYPH_DEBUG
  defsubr (&Sdump_face);
  defsubr (&Sshow_face_resources);
#endif /* GLYPH_DEBUG */
  defsubr (&Sclear_face_cache);
  defsubr (&Stty_suppress_bold_inverse_default_colors);

#if defined DEBUG_X_COLORS && defined HAVE_X_WINDOWS
  defsubr (&Sdump_colors);
#endif

  DEFVAR_LISP ("font-list-limit", Vfont_list_limit,
	       doc: /* *Limit for font matching.
If an integer > 0, font matching functions won't load more than
that number of fonts when searching for a matching font.  */);
  Vfont_list_limit = make_number (DEFAULT_FONT_LIST_LIMIT);

  DEFVAR_LISP ("face-new-frame-defaults", Vface_new_frame_defaults,
    doc: /* List of global face definitions (for internal use only.)  */);
  Vface_new_frame_defaults = Qnil;

  DEFVAR_LISP ("face-default-stipple", Vface_default_stipple,
    doc: /* *Default stipple pattern used on monochrome displays.
This stipple pattern is used on monochrome displays
instead of shades of gray for a face background color.
See `set-face-stipple' for possible values for this variable.  */);
  Vface_default_stipple = make_pure_c_string ("gray3");

  DEFVAR_LISP ("tty-defined-color-alist", Vtty_defined_color_alist,
   doc: /* An alist of defined terminal colors and their RGB values.
See the docstring of `tty-color-alist' for the details.  */);
  Vtty_defined_color_alist = Qnil;

  DEFVAR_LISP ("scalable-fonts-allowed", Vscalable_fonts_allowed,
	       doc: /* Allowed scalable fonts.
A value of nil means don't allow any scalable fonts.
A value of t means allow any scalable font.
Otherwise, value must be a list of regular expressions.  A font may be
scaled if its name matches a regular expression in the list.
Note that if value is nil, a scalable font might still be used, if no
other font of the appropriate family and registry is available.  */);
  Vscalable_fonts_allowed = Qnil;

  DEFVAR_LISP ("face-ignored-fonts", Vface_ignored_fonts,
	       doc: /* List of ignored fonts.
Each element is a regular expression that matches names of fonts to
ignore.  */);
  Vface_ignored_fonts = Qnil;

  DEFVAR_LISP ("face-remapping-alist", Vface_remapping_alist,
	       doc: /* Alist of face remappings.
Each element is of the form:

   (FACE REPLACEMENT...),

which causes display of the face FACE to use REPLACEMENT... instead.
REPLACEMENT... is interpreted the same way as the value of a `face'
text property: it may be (1) A face name, (2) A list of face names,
(3) A property-list of face attribute/value pairs, or (4) A list of
face names or lists containing face attribute/value pairs.

Multiple entries in REPLACEMENT... are merged together to form the final
result, with faces or attributes earlier in the list taking precedence
over those that are later.

Face-name remapping cycles are suppressed; recursive references use the
underlying face instead of the remapped face.  So a remapping of the form:

   (FACE EXTRA-FACE... FACE)

or:

   (FACE (FACE-ATTR VAL ...) FACE)

will cause EXTRA-FACE... or (FACE-ATTR VAL ...) to be _merged_ with the
existing definition of FACE.  Note that for the default face, this isn't
necessary, as every face inherits from the default face.

Making this variable buffer-local is a good way to allow buffer-specific
face definitions.  For instance, the mode my-mode could define a face
`my-mode-default', and then in the mode setup function, do:

   (set (make-local-variable 'face-remapping-alist)
        '((default my-mode-default)))).

Because Emacs normally only redraws screen areas when the underlying
buffer contents change, you may need to call `redraw-display' after
changing this variable for it to take effect.  */);
  Vface_remapping_alist = Qnil;

  DEFVAR_LISP ("face-font-rescale-alist", Vface_font_rescale_alist,
	       doc: /* Alist of fonts vs the rescaling factors.
Each element is a cons (FONT-PATTERN . RESCALE-RATIO), where
FONT-PATTERN is a font-spec or a regular expression matching a font name, and
RESCALE-RATIO is a floating point number to specify how much larger
\(or smaller) font we should use.  For instance, if a face requests
a font of 10 point, we actually use a font of 10 * RESCALE-RATIO point.  */);
  Vface_font_rescale_alist = Qnil;

#ifdef HAVE_WINDOW_SYSTEM
  defsubr (&Sbitmap_spec_p);
  defsubr (&Sx_list_fonts);
  defsubr (&Sinternal_face_x_get_resource);
  defsubr (&Sx_family_fonts);
#endif
}