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
|
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html401/loose.dtd">
<html>
<!-- Created on October, 27 2005 by texi2html 1.76 -->
<!--
Written by: Lionel Cons <Lionel.Cons@cern.ch> (original author)
Karl Berry <karl@freefriends.org>
Olaf Bachmann <obachman@mathematik.uni-kl.de>
and many others.
Maintained by: Many creative people <dev@texi2html.cvshome.org>
Send bugs and suggestions to <users@texi2html.cvshome.org>
-->
<head>
<title>Xlibscm: Top</title>
<meta name="description" content="Xlibscm: Top">
<meta name="keywords" content="Xlibscm: Top">
<meta name="resource-type" content="document">
<meta name="distribution" content="global">
<meta name="Generator" content="texi2html 1.76">
<meta http-equiv="Content-Type" content="text/html; charset=us-ascii">
<style type="text/css">
<!--
a.summary-letter {text-decoration: none}
pre.display {font-family: serif}
pre.format {font-family: serif}
pre.menu-comment {font-family: serif}
pre.menu-preformatted {font-family: serif}
pre.smalldisplay {font-family: serif; font-size: smaller}
pre.smallexample {font-size: smaller}
pre.smallformat {font-family: serif; font-size: smaller}
pre.smalllisp {font-size: smaller}
span.sansserif {font-family:sans-serif; font-weight:normal;}
ul.toc {list-style: none}
-->
</style>
</head>
<body lang="en" bgcolor="#FFFFFF" text="#000000" link="#0000FF" vlink="#800080" alink="#FF0000">
<a name="Top"></a>
<table cellpadding="1" cellspacing="1" border="0">
<tr><td valign="middle" align="left">[<a href="#Top" title="Cover (top) of document">Top</a>]</td>
<td valign="middle" align="left">[<a href="#SEC_Contents" title="Table of contents">Contents</a>]</td>
<td valign="middle" align="left">[<a href="#SEC16" title="Index">Index</a>]</td>
<td valign="middle" align="left">[<a href="#SEC_About" title="About (help)"> ? </a>]</td>
</tr></table>
<h1 class="settitle">Xlibscm
</h1>
<table class="menu" border="0" cellspacing="0">
<tr><td align="left" valign="top"><a href="#SEC1">1. Xlibscm</a></td><td> </td><td align="left" valign="top">
</td></tr>
<tr><td align="left" valign="top"><a href="#SEC2">2. Display and Screens</a></td><td> </td><td align="left" valign="top">
</td></tr>
<tr><td align="left" valign="top"><a href="#SEC3">3. Drawables</a></td><td> </td><td align="left" valign="top">
</td></tr>
<tr><td align="left" valign="top"><a href="#SEC7">4. Graphics Context</a></td><td> </td><td align="left" valign="top">
</td></tr>
<tr><td align="left" valign="top"><a href="#SEC9">5. Cursor</a></td><td> </td><td align="left" valign="top">
</td></tr>
<tr><td align="left" valign="top"><a href="#SEC10">6. Colormap</a></td><td> </td><td align="left" valign="top">
</td></tr>
<tr><td align="left" valign="top"><a href="#SEC11">7. Rendering</a></td><td> </td><td align="left" valign="top">
</td></tr>
<tr><td align="left" valign="top"><a href="#SEC14">8. Images</a></td><td> </td><td align="left" valign="top">
</td></tr>
<tr><td align="left" valign="top"><a href="#SEC15">9. Event</a></td><td> </td><td align="left" valign="top">
</td></tr>
<tr><td align="left" valign="top"><a href="#SEC16">Procedure and Macro Index</a></td><td> </td><td align="left" valign="top">
</td></tr>
</table>
<hr size="1">
<a name="Xlibscm"></a>
<a name="SEC1"></a>
<table cellpadding="1" cellspacing="1" border="0">
<tr><td valign="middle" align="left">[<a href="#Top" title="Previous section in reading order"> < </a>]</td>
<td valign="middle" align="left">[<a href="#SEC2" title="Next section in reading order"> > </a>]</td>
<td valign="middle" align="left"> </td>
<td valign="middle" align="left">[ << ]</td>
<td valign="middle" align="left">[<a href="#Top" title="Up section"> Up </a>]</td>
<td valign="middle" align="left">[<a href="#SEC2" title="Next chapter"> >> </a>]</td>
<td valign="middle" align="left"> </td>
<td valign="middle" align="left"> </td>
<td valign="middle" align="left"> </td>
<td valign="middle" align="left"> </td>
<td valign="middle" align="left">[<a href="#Top" title="Cover (top) of document">Top</a>]</td>
<td valign="middle" align="left">[<a href="#SEC_Contents" title="Table of contents">Contents</a>]</td>
<td valign="middle" align="left">[<a href="#SEC16" title="Index">Index</a>]</td>
<td valign="middle" align="left">[<a href="#SEC_About" title="About (help)"> ? </a>]</td>
</tr></table>
<h1 class="chapter"> 1. Xlibscm </h1>
<p><em>Xlibscm</em> is a SCM interface to <em>X</em>.
<a name="IDX1"></a>
The
<A HREF="http://www.x.org/">
X Window System
</A>
is a network-transparent window system that was
designed at MIT.
<A HREF="scm_toc.html">
SCM
</A>
is a portable Scheme implementation written in C.
The interface can be compiled into SCM or, on those platforms supporting
dynamic linking, compiled separately and loaded with <code>(require
'Xlib)</code>.
<a name="IDX2"></a>
</p>
<p>Much of this X documentation is dervied from:
</p>
<p align="center"> Xlib - C Language X Interface
</p><p align="center"> X Consortium Standard
</p><p align="center"> X Version 11, Release 6.3
</p>
<p>The X Window System is a trademark of X Consortium, Inc.
</p>
<p>TekHVC is a trademark of Tektronix, Inc.
</p>
<p>Copyright (C) 1985, 1986, 1987, 1988, 1989, 1990, 1991, 1994, 1996 X
Consortium
</p>
<p>Permission is hereby granted, free of charge, to any person obtaining a
copy of this software and associated documentation files (the
"Software"), to deal in the Software without restriction, including
without limitation the rights to use, copy, modify, merge, publish,
distribute, sublicense, and/or sell copies of the Software, and to
permit persons to whom the Software is furnished to do so, subject to
the following conditions:
</p>
<p>The above copyright notice and this permission notice shall be included
in all copies or substantial portions of the Software.
</p>
<p>THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
IN NO EVENT SHALL THE X CONSORTIUM BE LIABLE FOR ANY CLAIM, DAMAGES OR
OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
OTHER DEALINGS IN THE SOFTWARE.
</p>
<p>Except as contained in this notice, the name of the X Consortium shall
not be used in advertising or otherwise to promote the sale, use or
other dealings in this Software without prior written authorization from
the X Consortium.
</p>
<p>Copyright (C) 1985, 1986, 1987, 1988, 1989, 1990, 1991 by
Digital Equipment Corporation
</p>
<p>Portions Copyright (C) 1990, 1991 by Tektronix, Inc.
</p>
<p>Permission to use, copy, modify and distribute this documentation for
any purpose and without fee is hereby granted, provided that the above
copyright notice appears in all copies and that both that copyright
notice and this permission notice appear in all copies, and that the
names of Digital and Tektronix not be used in in advertising or
publicity pertaining to this documentation without specific, written
prior permission. Digital and Tektronix makes no representations about
the suitability of this documentation for any purpose. It is provided
"as is" without express or implied warranty.
</p>
<hr size="6">
<a name="Display-and-Screens"></a>
<a name="SEC2"></a>
<table cellpadding="1" cellspacing="1" border="0">
<tr><td valign="middle" align="left">[<a href="#SEC1" title="Previous section in reading order"> < </a>]</td>
<td valign="middle" align="left">[<a href="#SEC3" title="Next section in reading order"> > </a>]</td>
<td valign="middle" align="left"> </td>
<td valign="middle" align="left">[<a href="#SEC1" title="Beginning of this chapter or previous chapter"> << </a>]</td>
<td valign="middle" align="left">[<a href="#Top" title="Up section"> Up </a>]</td>
<td valign="middle" align="left">[<a href="#SEC3" title="Next chapter"> >> </a>]</td>
<td valign="middle" align="left"> </td>
<td valign="middle" align="left"> </td>
<td valign="middle" align="left"> </td>
<td valign="middle" align="left"> </td>
<td valign="middle" align="left">[<a href="#Top" title="Cover (top) of document">Top</a>]</td>
<td valign="middle" align="left">[<a href="#SEC_Contents" title="Table of contents">Contents</a>]</td>
<td valign="middle" align="left">[<a href="#SEC16" title="Index">Index</a>]</td>
<td valign="middle" align="left">[<a href="#SEC_About" title="About (help)"> ? </a>]</td>
</tr></table>
<h1 class="chapter"> 2. Display and Screens </h1>
<dl>
<dt><u>Function:</u> <b>x:open-display</b><i> display-name</i>
<a name="IDX3"></a>
</dt>
<dd><p><var>display-name</var> Specifies the hardware display name, which determines
the display and communications domain to be used. On a POSIX-conformant
system, if the display-name is #f, it defaults to the value of the
<var>DISPLAY</var> environment variable.
</p>
<p>The encoding and interpretation of <var>display-name</var> is
implementation-dependent. On POSIX-conformant systems, the
<var>display-name</var> or <var>DISPLAY</var> environment variable can be a string
in the format:
</p>
<dl>
<dt><u>Special Form:</u> <b>hostname:number.screen-number</b>
<a name="IDX4"></a>
</dt>
<dd><p><var>hostname</var> specifies the name of the host machine on which the
display is physically attached. Follow the <var>hostname</var> with either a
single colon (:) or a double colon (::).
</p>
<p><var>number</var> specifies the number of the display server on that host
machine. You may optionally follow this display number with a period
(.). A single CPU can have more than one display. Multiple displays
are usually numbered starting with zero.
</p>
<p><var>screen-number</var> specifies the screen to be used on that server.
Multiple screens can be controlled by a single X server. The
<var>screen-number</var> sets an internal variable that can be accessed by
using the x:default-screen procedure.
</p></dd></dl>
</dd></dl>
<dl>
<dt><u>Function:</u> <b>x:close</b><i> display</i>
<a name="IDX5"></a>
</dt>
<dd><p><var>display</var> specifies the connection to the X server.
</p>
<p>The <code>x:close</code> function closes the connection to the X server for
the <var>display</var> specified and destroys all windows, resource IDs
(Window, Font, Pixmap, Colormap, Cursor, and GContext), or other
resources that the client has created on this display, unless the
close-down mode of the resource has been changed (see
<code>x:set-close-down-mode</code>). Therefore, these windows, resource IDs,
and other resources should not be used again or an error will be
generated. Before exiting, you should call <var>x:close-display</var> or
<var>x:flush</var> explicitly so that any pending errors are reported.
</p></dd></dl>
<dl>
<dt><u>Function:</u> <b>x:protocol-version</b><i> display</i>
<a name="IDX6"></a>
</dt>
<dd><p>Returns cons of the major version number (11) of the X protocol
associated with the connected <var>display</var> and the minor protocol
revision number of the X server.
</p></dd></dl>
<dl>
<dt><u>Function:</u> <b>x:server-vendor</b><i> display</i>
<a name="IDX7"></a>
</dt>
<dd><p>Returns a string that provides some identification of the owner of the X
server implementation. The contents of the string are
implementation-dependent.
</p></dd></dl>
<dl>
<dt><u>Function:</u> <b>x:vendor-release</b><i> display</i>
<a name="IDX8"></a>
</dt>
<dd><p>Returns a number related to a vendor's release of the X server.
</p></dd></dl>
<p>A display consists of one or more <em>Screen</em>s. Each screen has a
<em>root-window</em>, <em>default-graphics-context</em>, and <em>colormap</em>.
</p>
<dl>
<dt><u>Function:</u> <b>x:screen-count</b><i> display</i>
<a name="IDX9"></a>
</dt>
<dd><p>Returns the number of available screens.
</p></dd></dl>
<dl>
<dt><u>Function:</u> <b>x:default-screen</b><i> display</i>
<a name="IDX10"></a>
</dt>
<dd><p>Returns the default screen number specified by the <code>x:open-display</code>
function. Use this screen number in applications which will use only a
single screen.
</p></dd></dl>
<dl>
<dt><u>Function:</u> <b>x:root-window</b><i> display screen-number</i>
<a name="IDX11"></a>
</dt>
<dt><u>Function:</u> <b>x:root-window</b><i> display</i>
<a name="IDX12"></a>
</dt>
<dd><p><var>screen-number</var>, if givien, specifies the appropriate screen number
on the host server. Otherwise the default-screen for <var>display</var> is
used.
</p>
<p>Returns the root window for the specified <var>screen-number</var>. Use
<code>x:root-window</code> for functions that need a drawable of a particular
screen or for creating top-level windows.
</p>
<dl>
<dt><u>Function:</u> <b>x:root-window</b><i> window</i>
<a name="IDX13"></a>
</dt>
<dd><p>Returns the root window for the specified <var>window</var>'s screen.
</p></dd></dl>
<dl>
<dt><u>Function:</u> <b>x:default-colormap</b><i> display screen-number</i>
<a name="IDX14"></a>
</dt>
<dt><u>Function:</u> <b>x:default-colormap</b><i> display</i>
<a name="IDX15"></a>
</dt>
<dt><u>Function:</u> <b>x:default-colormap</b><i> window</i>
<a name="IDX16"></a>
</dt>
<dd><p>Returns the default colormap of the specified screen.
</p></dd></dl>
<dl>
<dt><u>Function:</u> <b>x:default-ccc</b><i> display screen-number</i>
<a name="IDX17"></a>
</dt>
<dt><u>Function:</u> <b>x:default-ccc</b><i> display</i>
<a name="IDX18"></a>
</dt>
<dt><u>Function:</u> <b>x:default-ccc</b><i> window</i>
<a name="IDX19"></a>
</dt>
<dd><p>Returns the default Color-Conversion-Context (ccc) of the specified
screen.
</p></dd></dl>
<dl>
<dt><u>Function:</u> <b>x:default-gc</b><i> display screen-number</i>
<a name="IDX20"></a>
</dt>
<dt><u>Function:</u> <b>x:default-gc</b><i> display</i>
<a name="IDX21"></a>
</dt>
<dt><u>Function:</u> <b>x:default-gc</b><i> window</i>
<a name="IDX22"></a>
</dt>
<dd><p>Returns the default graphics-context of the specified screen.
</p></dd></dl>
<dl>
<dt><u>Function:</u> <b>x:screen-depths</b><i> display screen-number</i>
<a name="IDX23"></a>
</dt>
<dt><u>Function:</u> <b>x:screen-depths</b><i> display</i>
<a name="IDX24"></a>
</dt>
<dt><u>Function:</u> <b>x:screen-depths</b><i> window</i>
<a name="IDX25"></a>
</dt>
<dd><p>Returns an array of depths supported by the specified screen.
</p></dd></dl>
<p>The <em>Visual</em> type describes possible colormap depths and
arrangements.
</p>
<dl>
<dt><u>Function:</u> <b>x:default-visual</b><i> display screen-number</i>
<a name="IDX26"></a>
</dt>
<dt><u>Function:</u> <b>x:default-visual</b><i> display</i>
<a name="IDX27"></a>
</dt>
<dt><u>Function:</u> <b>x:default-visual</b><i> window</i>
<a name="IDX28"></a>
</dt>
<dd><p>Returns the default Visual type for the specified screen.
</p>
<a name="IDX29"></a>
<a name="IDX30"></a>
</dd></dl>
<dl>
<dt><u>Function:</u> <b>x:make-visual</b><i> display depth class</i>
<a name="IDX31"></a>
</dt>
<dt><u>Function:</u> <b>x:make-visual</b><i> window depth class</i>
<a name="IDX32"></a>
</dt>
<dd><p>The integer <var>depth</var> specifies the number of bits per pixel.
The <var>class</var> argument specifies one of the possible
visual classes for a screen:
</p><ul>
<li> x:Static-Gray
</li><li> x:Static-Color
</li><li> x:True-Color
</li><li> x:Gray-Scale
</li><li> x:Pseudo-Color
</li><li> x:Direct-Color
</li></ul>
<p><code>X:make-visual</code> returns a visual type for the screen specified by
<var>display</var> or <var>window</var> if successful; #f if not.
</p></dd></dl>
<dl>
<dt><u>Function:</u> <b>x:visual-class</b><i> visual</i>
<a name="IDX33"></a>
</dt>
<dt><u>Function:</u> <b>x:visual-class</b><i> screen</i>
<a name="IDX34"></a>
</dt>
<dt><u>Function:</u> <b>x:visual-class</b><i> display</i>
<a name="IDX35"></a>
</dt>
<dd><p>Returns the (integer) visual class of its argument.
</p></dd></dl>
<dl>
<dt><u>Function:</u> <b>x:visual-geometry</b><i> visual</i>
<a name="IDX36"></a>
</dt>
<dt><u>Function:</u> <b>x:visual-geometry</b><i> screen</i>
<a name="IDX37"></a>
</dt>
<dt><u>Function:</u> <b>x:visual-geometry</b><i> display</i>
<a name="IDX38"></a>
</dt>
<dd><p>Returns a list of the:
</p><ul>
<li> red_mask
</li><li> green_mask
</li><li> blue_mask
</li><li> colormap_size
</li></ul>
</dd></dl>
<dl>
<dt><u>Function:</u> <b>x:screen-cells</b><i> display screen-number</i>
<a name="IDX39"></a>
</dt>
<dt><u>Function:</u> <b>x:screen-cells</b><i> display</i>
<a name="IDX40"></a>
</dt>
<dt><u>Function:</u> <b>x:screen-cells</b><i> window</i>
<a name="IDX41"></a>
</dt>
<dd><p>Returns the number of entries in the default colormap.
</p></dd></dl>
<dl>
<dt><u>Function:</u> <b>x:screen-depth</b><i> display screen-number</i>
<a name="IDX42"></a>
</dt>
<dd><p>Returns the depth of the root window of the specified screen.
</p><dl>
<dt><u>Function:</u> <b>x:screen-depth</b><i> display</i>
<a name="IDX43"></a>
</dt>
<dt><u>Function:</u> <b>x:screen-depth</b><i> window</i>
<a name="IDX44"></a>
</dt>
<dt><u>Function:</u> <b>x:screen-depth</b><i> visual</i>
<a name="IDX45"></a>
</dt>
<dd><p>Returns the depth of argument.
</p>
<a name="IDX46"></a>
<p>The <em>depth</em> of a window or pixmap is the number of bits per pixel it has.
The <em>depth</em> of a graphics context is the depth of the drawables it can be
used in conjunction with graphics output.
</p></dd></dl>
<dl>
<dt><u>Function:</u> <b>x:screen-size</b><i> display screen-number</i>
<a name="IDX47"></a>
</dt>
<dt><u>Function:</u> <b>x:screen-size</b><i> display</i>
<a name="IDX48"></a>
</dt>
<dt><u>Function:</u> <b>x:screen-size</b><i> window</i>
<a name="IDX49"></a>
</dt>
<dd><p>Returns a list of integer height and width of the screen in pixels.
</p></dd></dl>
<dl>
<dt><u>Function:</u> <b>x:screen-dimensions</b><i> display screen-number</i>
<a name="IDX50"></a>
</dt>
<dt><u>Function:</u> <b>x:screen-dimensions</b><i> display</i>
<a name="IDX51"></a>
</dt>
<dt><u>Function:</u> <b>x:screen-dimensions</b><i> window</i>
<a name="IDX52"></a>
</dt>
<dd><p>Returns a list of integer height and width of the screen in millimeters.
</p></dd></dl>
<dl>
<dt><u>Function:</u> <b>x:screen-white</b><i> display screen-number</i>
<a name="IDX53"></a>
</dt>
<dt><u>Function:</u> <b>x:screen-white</b><i> display</i>
<a name="IDX54"></a>
</dt>
<dt><u>Function:</u> <b>x:screen-white</b><i> window</i>
<a name="IDX55"></a>
</dt>
<dd><p>Returns the white pixel value of the specified screen.
</p></dd></dl>
<dl>
<dt><u>Function:</u> <b>x:screen-black</b><i> display screen-number</i>
<a name="IDX56"></a>
</dt>
<dt><u>Function:</u> <b>x:screen-black</b><i> display</i>
<a name="IDX57"></a>
</dt>
<dt><u>Function:</u> <b>x:screen-black</b><i> window</i>
<a name="IDX58"></a>
</dt>
<dd><p>Returns the black pixel value of the specified screen.
</p></dd></dl>
</dd></dl>
</dd></dl>
<hr size="6">
<a name="Drawables"></a>
<a name="SEC3"></a>
<table cellpadding="1" cellspacing="1" border="0">
<tr><td valign="middle" align="left">[<a href="#SEC2" title="Previous section in reading order"> < </a>]</td>
<td valign="middle" align="left">[<a href="#SEC4" title="Next section in reading order"> > </a>]</td>
<td valign="middle" align="left"> </td>
<td valign="middle" align="left">[<a href="#SEC2" title="Beginning of this chapter or previous chapter"> << </a>]</td>
<td valign="middle" align="left">[<a href="#Top" title="Up section"> Up </a>]</td>
<td valign="middle" align="left">[<a href="#SEC7" title="Next chapter"> >> </a>]</td>
<td valign="middle" align="left"> </td>
<td valign="middle" align="left"> </td>
<td valign="middle" align="left"> </td>
<td valign="middle" align="left"> </td>
<td valign="middle" align="left">[<a href="#Top" title="Cover (top) of document">Top</a>]</td>
<td valign="middle" align="left">[<a href="#SEC_Contents" title="Table of contents">Contents</a>]</td>
<td valign="middle" align="left">[<a href="#SEC16" title="Index">Index</a>]</td>
<td valign="middle" align="left">[<a href="#SEC_About" title="About (help)"> ? </a>]</td>
</tr></table>
<h1 class="chapter"> 3. Drawables </h1>
<p>A <em>Drawable</em> is either a window or pixmap.
</p>
<table class="menu" border="0" cellspacing="0">
<tr><td align="left" valign="top"><a href="#SEC4">3.1 Windows and Pixmaps</a></td><td> </td><td align="left" valign="top">
</td></tr>
<tr><td align="left" valign="top"><a href="#SEC5">3.2 Window Attributes</a></td><td> </td><td align="left" valign="top">
</td></tr>
<tr><td align="left" valign="top"><a href="#SEC6">3.3 Window Properties and Visibility</a></td><td> </td><td align="left" valign="top">
</td></tr>
</table>
<hr size="6">
<a name="Windows-and-Pixmaps"></a>
<a name="SEC4"></a>
<table cellpadding="1" cellspacing="1" border="0">
<tr><td valign="middle" align="left">[<a href="#SEC3" title="Previous section in reading order"> < </a>]</td>
<td valign="middle" align="left">[<a href="#SEC5" title="Next section in reading order"> > </a>]</td>
<td valign="middle" align="left"> </td>
<td valign="middle" align="left">[<a href="#SEC3" title="Beginning of this chapter or previous chapter"> << </a>]</td>
<td valign="middle" align="left">[<a href="#SEC3" title="Up section"> Up </a>]</td>
<td valign="middle" align="left">[<a href="#SEC7" title="Next chapter"> >> </a>]</td>
<td valign="middle" align="left"> </td>
<td valign="middle" align="left"> </td>
<td valign="middle" align="left"> </td>
<td valign="middle" align="left"> </td>
<td valign="middle" align="left">[<a href="#Top" title="Cover (top) of document">Top</a>]</td>
<td valign="middle" align="left">[<a href="#SEC_Contents" title="Table of contents">Contents</a>]</td>
<td valign="middle" align="left">[<a href="#SEC16" title="Index">Index</a>]</td>
<td valign="middle" align="left">[<a href="#SEC_About" title="About (help)"> ? </a>]</td>
</tr></table>
<h2 class="section"> 3.1 Windows and Pixmaps </h2>
<dl>
<dt><u>Function:</u> <b>x:create-window</b><i> window position size border-width depth class visual field-name value …</i>
<a name="IDX59"></a>
</dt>
<dd><p>Creates and returns an unmapped Input-Output subwindow for a specified
parent <var>window</var> and causes the X server to generate a CreateNotify
event. The created window is placed on top in the stacking order with
respect to siblings. Any part of the window that extends outside its
parent <var>window</var> is clipped. The <var>border-width</var> for an
x:Input-Only window must be zero.
</p>
<p>The coordinate system has the X axis horizontal and the Y axis vertical
with the origin [0, 0] at the upper-left corner. Coordinates are
integral, in terms of pixels, and coincide with pixel centers. Each
window and pixmap has its own coordinate system. For a window, the
origin is inside the border at the inside, upper-left corner.
</p>
<p><var>Class</var> can be x:Input-Output, x:Input-Only, or x:Copy-From-Parent.
For class x:Input-Output, the <var>visual</var> type and <var>depth</var> must be
a combination supported for the screen. The <var>depth</var> need not be the
same as the parent, but the parent must not be a window of class
x:Input-Only. For an x:Input-Only window, the <var>depth</var> must be zero,
and the <var>visual</var> must be one supported by the screen.
</p>
<p>The returned window will have the attributes specified by
<var>field-name</var>s and <var>value</var>.
</p>
<dl>
<dt><u>Function:</u> <b>x:create-window</b><i> window position size border-width border background</i>
<a name="IDX60"></a>
</dt>
<dd><p>The returned window inherits its depth, class, and visual from its
parent. All other window attributes, except <var>background</var> and
<var>border</var>, have their default values.
</p></dd></dl>
<dl>
<dt><u>Function:</u> <b>x:create-pixmap</b><i> drawable size depth</i>
<a name="IDX61"></a>
</dt>
<dt><u>Function:</u> <b>x:create-pixmap</b><i> display size depth</i>
<a name="IDX62"></a>
</dt>
<dd><p><var>size</var> is a list, vector, or pair of nonzero integers specifying the width
and height desired in the new pixmap.
</p>
<p><var>x:create-pixmap</var> returns a new pixmap of the width, height, and
<var>depth</var> specified. It is valid to pass an x:Input-Only window to the
drawable argument. The <var>depth</var> argument must be one of the depths
supported by the screen of the specified <var>drawable</var>.
</p></dd></dl>
<dl>
<dt><u>Function:</u> <b>x:close</b><i> window</i>
<a name="IDX63"></a>
</dt>
<dd><p>Destroys the specified <var>window</var> as well as all of its subwindows and
causes the X server to generate a DestroyNotify event for each window.
The window should not be used again. If the window specified by the
<var>window</var> argument is mapped, it is unmapped automatically. The
ordering of the DestroyNotify events is such that for any given window
being destroyed, DestroyNotify is generated on any inferiors of the
window before being generated on the window itself. The ordering among
siblings and across subhierarchies is not otherwise constrained. If the
<var>window</var> you specified is a root window, an error is signaled.
Destroying a mapped <var>window</var> will generate x:Expose events on other
windows that were obscured by the window being destroyed.
</p></dd></dl>
<dl>
<dt><u>Function:</u> <b>x:close</b><i> pixmap</i>
<a name="IDX64"></a>
</dt>
<dd><p>Deletes the association between the <var>pixmap</var> and its storage. The X
server frees the pixmap storage when there are no references to it.
</p></dd></dl>
<dl>
<dt><u>Function:</u> <b>x:window-geometry</b><i> drawable</i>
<a name="IDX65"></a>
</dt>
<dd><p>Returns a list of:
</p>
<dl compact="compact">
<dt> coordinates</dt>
<dd><p><code>list</code> of x and y coordinates that define the location of the
<var>drawable</var>. For a window, these coordinates specify the upper-left
outer corner relative to its parent's origin. For pixmaps, these
coordinates are always zero.
</p></dd>
<dt> size</dt>
<dd><p><code>list</code> of the <var>drawable</var>'s dimensions (width and height). For
a window, these dimensions specify the inside size, not including the
border.
</p></dd>
<dt> border-width</dt>
<dd><p>The border width in pixels. If the <var>drawable</var> is a pixmap, this is
zero.
</p></dd>
<dt> depth</dt>
<dd><p>The depth of the <var>drawable</var> (bits per pixel for the object).
</p></dd>
</dl>
</dd></dl>
<dl>
<dt><u>Function:</u> <b>x:window-geometry-set!</b><i> window field-name value …</i>
<a name="IDX66"></a>
</dt>
<dd><p>Changes the <em>Configuration</em> components specified by
<var>field-name</var>s for the specified <var>window</var>.
</p></dd></dl>
<p>These are the attributes settable by <code>x:window-geometry-set!</code>.
That these attributes are encoded by small integers - just like those
of the next section. Be warned therefore that confusion of attribute
names will likely not signal errors, just cause mysterious behavior.
</p>
<dl>
<dt><u>Attribute:</u> <b>x:CWX</b>
<a name="IDX67"></a>
</dt>
<dt><u>Attribute:</u> <b>x:CWY</b>
<a name="IDX68"></a>
</dt>
<dt><u>Attribute:</u> <b>x:CW-Width</b>
<a name="IDX69"></a>
</dt>
<dt><u>Attribute:</u> <b>x:CW-Height</b>
<a name="IDX70"></a>
</dt>
<dd><p>The x:CWX and x:CYY members are used to set the window's x and y
coordinates, which are relative to the parent's origin and indicate the
position of the upper-left outer corner of the window. The x:CW-Width
and x:CW-Height members are used to set the inside size of the window,
not including the border, and must be nonzero. Attempts to configure a
root window have no effect.
</p>
<p>If a window's size actually changes, the window's subwindows move
according to their window gravity. Depending on the window's bit
gravity, the contents of the window also may be moved
</p></dd></dl>
<dl>
<dt><u>Attribute:</u> <b>x:CW-Border-Width</b>
<a name="IDX71"></a>
</dt>
<dd><p>The integer x:CW-Border-Width is used to set the width of the border in
pixels. Note that setting just the border width leaves the outer-left
corner of the window in a fixed position but moves the absolute position
of the window's origin. It is an error to set the border-width
attribute of an InputOnly window nonzero.
</p></dd></dl>
<dl>
<dt><u>Attribute:</u> <b>x:CW-Sibling</b>
<a name="IDX72"></a>
</dt>
<dd><p>The sibling member is used to set the sibling window for stacking
operations.
</p></dd></dl>
<dl>
<dt><u>Attribute:</u> <b>x:CW-Stack-Mode</b>
<a name="IDX73"></a>
</dt>
<dd><p>The x:CW-Stack-Mode member is used to set how the window is to be
restacked and can be set to x:Above, x:Below, x:Top-If, x:Bottom-If, or
x:Opposite.
</p></dd></dl>
<p>If a sibling and a stack-mode are specified, the window is restacked as
follows:
</p>
<dl compact="compact">
<dt> <code>x:Above</code></dt>
<dd><p>The window is placed just above the sibling.
</p></dd>
<dt> <code>x:Below</code></dt>
<dd><p>The window is placed just below the sibling.
</p></dd>
<dt> <code>x:Top-If</code></dt>
<dd><p>If the sibling occludes the window, the window is placed at the top of
the stack.
</p></dd>
<dt> <code>x:Bottom-If</code></dt>
<dd><p>If the window occludes the sibling, the window is placed at the bottom
of the stack.
</p></dd>
<dt> <code>x:Opposite</code></dt>
<dd><p>If the sibling occludes the window, the window is placed at the top of
the stack. If the window occludes the sibling, the window is placed at
the bottom of the stack.
</p></dd>
</dl>
<p>If a stack-mode is specified but no sibling is specified, the window
is restacked as follows:
</p>
<dl compact="compact">
<dt> <code>x:Above</code></dt>
<dd><p>The window is placed at the top of the stack.
</p></dd>
<dt> <code>x:Below</code></dt>
<dd><p>The window is placed at the bottom of the stack.
</p></dd>
<dt> <code>x:Top-If</code></dt>
<dd><p>If any sibling occludes the window, the window is placed at the top of
the stack.
</p></dd>
<dt> <code>x:Bottom-If</code></dt>
<dd><p>If the window occludes any sibling, the window is placed at the bottom
of the stack.
</p></dd>
<dt> <code>x:Opposite</code></dt>
<dd><p>If any sibling occludes the window, the window is placed at the top of
the stack. If the window occludes any sibling, the window is placed at
the bottom of the stack.
</p></dd>
</dl>
</dd></dl>
<hr size="6">
<a name="Window-Attributes"></a>
<a name="SEC5"></a>
<table cellpadding="1" cellspacing="1" border="0">
<tr><td valign="middle" align="left">[<a href="#SEC4" title="Previous section in reading order"> < </a>]</td>
<td valign="middle" align="left">[<a href="#SEC6" title="Next section in reading order"> > </a>]</td>
<td valign="middle" align="left"> </td>
<td valign="middle" align="left">[<a href="#SEC3" title="Beginning of this chapter or previous chapter"> << </a>]</td>
<td valign="middle" align="left">[<a href="#SEC3" title="Up section"> Up </a>]</td>
<td valign="middle" align="left">[<a href="#SEC7" title="Next chapter"> >> </a>]</td>
<td valign="middle" align="left"> </td>
<td valign="middle" align="left"> </td>
<td valign="middle" align="left"> </td>
<td valign="middle" align="left"> </td>
<td valign="middle" align="left">[<a href="#Top" title="Cover (top) of document">Top</a>]</td>
<td valign="middle" align="left">[<a href="#SEC_Contents" title="Table of contents">Contents</a>]</td>
<td valign="middle" align="left">[<a href="#SEC16" title="Index">Index</a>]</td>
<td valign="middle" align="left">[<a href="#SEC_About" title="About (help)"> ? </a>]</td>
</tr></table>
<h2 class="section"> 3.2 Window Attributes </h2>
<dl>
<dt><u>Function:</u> <b>x:window-set!</b><i> window field-name value …</i>
<a name="IDX74"></a>
</dt>
<dd><p>Changes the components specified by <var>field-name</var>s for the specified
<var>window</var>. The restrictions are the same as for
<code>x:create-window</code>. The order in which components are verified and
altered is server dependent. If an error occurs, a subset of the
components may have been altered.
</p></dd></dl>
<p>The <code>x:create-window</code> and <code>x:window-set!</code> procedures take five
and one argument (respectively) followed by pairs of arguments, where
the first is one of the property-name symbols (or its top-level value)
listed below; and the second is the value to associate with that
property.
</p>
<dl>
<dt><u>Attribute:</u> <b>x:CW-Back-Pixmap</b>
<a name="IDX75"></a>
</dt>
<dd><p>Sets the background pixmap of the <var>window</var> to the specified pixmap.
The background pixmap can immediately be freed if no further explicit
references to it are to be made. If x:Parent-Relative is specified, the
background pixmap of the window's parent is used, or on the root window,
the default background is restored. It is an error to perform this
operation on an x:Input-Only window. If the background is set to #f or
None, the window has no defined background.
</p></dd></dl>
<dl>
<dt><u>Attribute:</u> <b>x:CW-Back-Pixel</b>
<a name="IDX76"></a>
</dt>
<dd><p>Sets the background of the <var>window</var> to the specified pixel value.
Changing the background does not cause the <var>window</var> contents to be
changed. It is an error to perform this operation on an x:Input-Only
window.
</p></dd></dl>
<dl>
<dt><u>Attribute:</u> <b>x:CW-Border-Pixmap</b>
<a name="IDX77"></a>
</dt>
<dd><p>Sets the border pixmap of the <var>window</var> to the pixmap you specify.
The border pixmap can be freed if no further explicit references to it
are to be made. If you specify x:Copy-From-Parent, a copy of the parent
window's border pixmap is used. It is an error to perform this
operation on an x:Input-Only <var>window</var>.
</p></dd></dl>
<dl>
<dt><u>Attribute:</u> <b>x:CW-Border-Pixel</b>
<a name="IDX78"></a>
</dt>
<dd><p>Sets the border of the <var>window</var> to the pixel <var>value</var>. It is an
error to perform this operation on an x:Input-Only window.
</p></dd></dl>
<dl>
<dt><u>Attribute:</u> <b>x:CW-Bit-Gravity</b>
<a name="IDX79"></a>
</dt>
<dt><u>Attribute:</u> <b>x:CW-Win-Gravity</b>
<a name="IDX80"></a>
</dt>
<dd><p>The bit gravity of a window defines which region of the window should be
retained when an x:Input-Output window is resized. The default value
for the bit-gravity attribute is x:Forget-Gravity. The window gravity
of a window allows you to define how the x:Input-Output or x:Input-Only
window should be repositioned if its parent is resized. The default
value for the win-gravity attribute is x:North-West-Gravity.
</p>
<p>If the inside width or height of a window is not changed and if the
window is moved or its border is changed, then the contents of the
window are not lost but move with the window. Changing the inside width
or height of the window causes its contents to be moved or lost
(depending on the bit-gravity of the window) and causes children to be
reconfigured (depending on their win-gravity). For a change of width
and height, the (x, y) pairs are defined:
</p>
<table>
<tr><td><p> Gravity Direction
</p></td><td><p> Coordinates
</p></td></tr>
<tr><td><p> x:North-West-Gravity
</p></td><td><p> (0, 0)
</p></td></tr>
<tr><td><p> x:North-Gravity
</p></td><td><p> (Width/2, 0)
</p></td></tr>
<tr><td><p> x:North-East-Gravity
</p></td><td><p> (Width, 0)
</p></td></tr>
<tr><td><p> x:West-Gravity
</p></td><td><p> (0, Height/2)
</p></td></tr>
<tr><td><p> x:Center-Gravity
</p></td><td><p> (Width/2, Height/2)
</p></td></tr>
<tr><td><p> x:East-Gravity
</p></td><td><p> (Width, Height/2)
</p></td></tr>
<tr><td><p> x:South-West-Gravity
</p></td><td><p> (0, Height)
</p></td></tr>
<tr><td><p> x:South-Gravity
</p></td><td><p> (Width/2, Height)
</p></td></tr>
<tr><td><p> x:South-East-Gravity
</p></td><td><p> (Width, Height)
</p></td></tr>
</table>
<p>When a window with one of these bit-gravity values is resized, the
corresponding pair defines the change in position of each pixel in the
window. When a window with one of these win-gravities has its parent
window resized, the corresponding pair defines the change in position of
the window within the parent. When a window is so repositioned, a
x:Gravity-Notify event is generated (see section 10.10.5).
</p>
<p>A bit-gravity of x:Static-Gravity indicates that the contents or origin
should not move relative to the origin of the root window. If the
change in size of the window is coupled with a change in position (x,
y), then for bit-gravity the change in position of each pixel is (-x,
-y), and for win-gravity the change in position of a child when its
parent is so resized is (-x, -y). Note that x:Static-Gravity still only
takes effect when the width or height of the window is changed, not when
the window is moved.
</p>
<p>A bit-gravity of x:Forget-Gravity indicates that the window's contents
are always discarded after a size change, even if a backing store or
save under has been requested. The window is tiled with its background
and zero or more x:Expose events are generated. If no background is
defined, the existing screen contents are not altered. Some X servers
may also ignore the specified bit-gravity and always generate x:Expose
events.
</p>
<p>The contents and borders of inferiors are not affected by their parent's
bit-gravity. A server is permitted to ignore the specified bit-gravity
and use x:Forget-Gravity instead.
</p>
<p>A win-gravity of x:Unmap-Gravity is like x:North-West-Gravity (the
window is not moved), except the child is also unmapped when the parent
is resized, and an x:Unmap-Notify event is generated.
</p></dd></dl>
<dl>
<dt><u>Attribute:</u> <b>x:CW-Backing-Store</b>
<a name="IDX81"></a>
</dt>
<dd><p>Some implementations of the X server may choose to maintain the contents
of x:Input-Output windows. If the X server maintains the contents of a
window, the off-screen saved pixels are known as backing store. The
backing store advises the X server on what to do with the contents of a
window. The backing-store attribute can be set to x:Not-Useful
(default), x:When-Mapped, or x:Always. A backing-store attribute of
x:Not-Useful advises the X server that maintaining contents is
unnecessary, although some X implementations may still choose to
maintain contents and, therefore, not generate x:Expose events. A
backing-store attribute of x:When-Mapped advises the X server that
maintaining contents of obscured regions when the window is mapped would
be beneficial. In this case, the server may generate an x:Expose event
when the window is created. A backing-store attribute of x:Always
advises the X server that maintaining contents even when the window is
unmapped would be beneficial. Even if the window is larger than its
parent, this is a request to the X server to maintain complete contents,
not just the region within the parent window boundaries. While the X
server maintains the window's contents, x:Expose events normally are not
generated, but the X server may stop maintaining contents at any time.
</p>
<p>When the contents of obscured regions of a window are being maintained,
regions obscured by noninferior windows are included in the destination
of graphics requests (and source, when the window is the source).
However, regions obscured by inferior windows are not included.
</p></dd></dl>
<dl>
<dt><u>Attribute:</u> <b>x:CW-Backing-Planes</b>
<a name="IDX82"></a>
</dt>
<dt><u>Attribute:</u> <b>x:CW-Backing-Pixel</b>
<a name="IDX83"></a>
</dt>
<dd><p>You can set backing planes to indicate (with bits set to 1) which bit
planes of an x:Input-Output window hold dynamic data that must be
preserved in backing store and during save unders. The default value
for the backing-planes attribute is all bits set to 1. You can set
backing pixel to specify what bits to use in planes not covered by
backing planes. The default value for the backing-pixel attribute is
all bits set to 0. The X server is free to save only the specified bit
planes in the backing store or the save under and is free to regenerate
the remaining planes with the specified pixel value. Any extraneous
bits in these values (that is, those bits beyond the specified depth of
the window) may be simply ignored. If you request backing store or save
unders, you should use these members to minimize the amount of
off-screen memory required to store your window.
</p></dd></dl>
<dl>
<dt><u>Attribute:</u> <b>x:CW-Override-Redirect</b>
<a name="IDX84"></a>
</dt>
<dd><p>To control window placement or to add decoration, a window manager often
needs to intercept (redirect) any map or configure request. Pop-up
windows, however, often need to be mapped without a window manager
getting in the way. To control whether an x:Input-Output or
x:Input-Only window is to ignore these structure control facilities, use
the override-redirect flag.
</p>
<p>The override-redirect flag specifies whether map and configure requests
on this window should override a x:Substructure-Redirect-Mask on the
parent. You can set the override-redirect flag to #t or #f (default).
Window managers use this information to avoid tampering with pop-up
windows.
</p></dd></dl>
<dl>
<dt><u>Attribute:</u> <b>x:CW-Save-Under</b>
<a name="IDX85"></a>
</dt>
<dd><p>Some server implementations may preserve contents of x:Input-Output windows
under other x:Input-Output windows. This is not the same as preserving the
contents of a window for you. You may get better visual appeal if
transient windows (for example, pop-up menus) request that the system
preserve the screen contents under them, so the temporarily obscured
applications do not have to repaint.
</p>
<p>You can set the save-under flag to True or False (default). If
save-under is True, the X server is advised that, when this window is
mapped, saving the contents of windows it obscures would be beneficial.
</p></dd></dl>
<dl>
<dt><u>Attribute:</u> <b>x:CW-Event-Mask</b>
<a name="IDX86"></a>
</dt>
<dd><p>The event mask defines which events the client is interested in for this
x:Input-Output or x:Input-Only window (or, for some event types,
inferiors of this window). The event mask is the bitwise inclusive OR
of zero or more of the valid event mask bits. You can specify that no
maskable events are reported by setting x:No-Event-Mask (default).
</p>
<p>The following table lists the event mask constants you can pass to the
event-mask argument and the circumstances in which you would want to
specify the event mask:
</p>
<table>
<tr><td><p> Event Mask
</p></td><td><p> Circumstances
</p></td></tr>
<tr><td><p> x:No-Event-Mask
</p></td><td><p> No events wanted
</p></td></tr>
<tr><td><p> x:Key-Press-Mask
</p></td><td><p> Keyboard down events wanted
</p></td></tr>
<tr><td><p> x:Key-Release-Mask
</p></td><td><p> Keyboard up events wanted
</p></td></tr>
<tr><td><p> x:Button-Press-Mask
</p></td><td><p> Pointer button down events wanted
</p></td></tr>
<tr><td><p> x:Button-Release-Mask
</p></td><td><p> Pointer button up events wanted
</p></td></tr>
<tr><td><p> x:Enter-Window-Mask
</p></td><td><p> Pointer window entry events wanted
</p></td></tr>
<tr><td><p> x:Leave-Window-Mask
</p></td><td><p> Pointer window leave events wanted
</p></td></tr>
<tr><td><p> x:Pointer-Motion-Mask
</p></td><td><p> Pointer motion events wanted
</p></td></tr>
<tr><td><p> x:Pointer-Motion-Hint-Mask
</p></td><td>
<p>If x:Pointer-Motion-Hint-Mask is selected in combination with one or
more motion-masks, the X server is free to send only one x:Motion-Notify
event (with the is_hint member of the X:Pointer-Moved-Event structure
set to x:Notify-Hint) to the client for the event window, until either
the key or button state changes, the pointer leaves the event window, or
the client calls X:Query-Pointer or X:Get-Motion-Events. The server
still may send x:Motion-Notify events without is_hint set to
x:Notify-Hint.
</p></td></tr>
<tr><td><p> x:Button1-Motion-Mask
</p></td><td><p> Pointer motion while button 1 down
</p></td></tr>
<tr><td><p> x:Button2-Motion-Mask
</p></td><td><p> Pointer motion while button 2 down
</p></td></tr>
<tr><td><p> x:Button3-Motion-Mask
</p></td><td><p> Pointer motion while button 3 down
</p></td></tr>
<tr><td><p> x:Button4-Motion-Mask
</p></td><td><p> Pointer motion while button 4 down
</p></td></tr>
<tr><td><p> x:Button5-Motion-Mask
</p></td><td><p> Pointer motion while button 5 down
</p></td></tr>
<tr><td><p> x:Button-Motion-Mask
</p></td><td><p> Pointer motion while any button down
</p></td></tr>
<tr><td><p> x:Keymap-State-Mask
</p></td><td><p> Keyboard state wanted at window entry and focus in
</p></td></tr>
<tr><td><p> x:Exposure-Mask
</p></td><td><p> Any exposure wanted
</p></td></tr>
<tr><td><p> x:Visibility-Change-Mask
</p></td><td><p> Any change in visibility wanted
</p></td></tr>
<tr><td><p> x:Structure-Notify-Mask
</p></td><td><p> Any change in window structure wanted
</p></td></tr>
<tr><td><p> x:Resize-Redirect-Mask
</p></td><td><p> Redirect resize of this window
</p></td></tr>
<tr><td><p> x:Substructure-Notify-Mask
</p></td><td><p> Substructure notification wanted
</p></td></tr>
<tr><td><p> x:Substructure-Redirect-Mask
</p></td><td><p> Redirect structure requests on children
</p></td></tr>
<tr><td><p> x:Focus-Change-Mask
</p></td><td><p> Any change in input focus wanted
</p></td></tr>
<tr><td><p> x:Property-Change-Mask
</p></td><td><p> Any change in property wanted
</p></td></tr>
<tr><td><p> x:Colormap-Change-Mask
</p></td><td><p> Any change in colormap wanted
</p></td></tr>
<tr><td><p> x:Owner-Grab-Button-Mask
</p></td><td><p> Automatic grabs should activate with owner_events set to True
</p></td></tr>
</table>
</dd></dl>
<dl>
<dt><u>Attribute:</u> <b>x:CW-Dont-Propagate</b>
<a name="IDX87"></a>
</dt>
<dd><p>The do-not-propagate-mask attribute defines which events should not be
propagated to ancestor windows when no client has the event type
selected in this x:Input-Output or x:Input-Only window. The
do-not-propagate-mask is the bitwise inclusive OR of zero or more of the
following masks: x:Key-Press, x:Key-Release, x:Button-Press,
x:Button-Release, x:Pointer-Motion, x:Button1Motion, x:Button2Motion,
x:Button3Motion, x:Button4Motion, x:Button5Motion, and x:Button-Motion.
You can specify that all events are propagated by setting
x:No-Event-Mask (default).
</p></dd></dl>
<dl>
<dt><u>Attribute:</u> <b>x:CW-Colormap</b>
<a name="IDX88"></a>
</dt>
<dd><p>The colormap attribute specifies which colormap best reflects the true
colors of the x:Input-Output window. The colormap must have the same
visual type as the window. X servers capable of supporting multiple
hardware colormaps can use this information, and window managers can use
it for calls to X:Install-Colormap. You can set the colormap attribute
to a colormap or to x:Copy-From-Parent (default).
</p>
<p>If you set the colormap to x:Copy-From-Parent, the parent window's
colormap is copied and used by its child. However, the child window
must have the same visual type as the parent. The parent window must
not have a colormap of x:None. The colormap is copied by sharing the
colormap object between the child and parent, not by making a complete
copy of the colormap contents. Subsequent changes to the parent
window's colormap attribute do not affect the child window.
</p></dd></dl>
<dl>
<dt><u>Attribute:</u> <b>x:CW-Cursor</b>
<a name="IDX89"></a>
</dt>
<dd><p>The cursor attribute specifies which cursor is to be used when the
pointer is in the x:Input-Output or x:Input-Only window. You can set
the cursor to a cursor or x:None (default).
</p>
<p>If you set the cursor to x:None, the parent's cursor is used when the
pointer is in the x:Input-Output or x:Input-Only window, and any change
in the parent's cursor will cause an immediate change in the displayed
cursor. On the root window, the default cursor is restored.
</p></dd></dl>
<dl>
<dt><u>Function:</u> <b>x:window-ref</b><i> window field-name …</i>
<a name="IDX90"></a>
</dt>
<dd><p>Returns a list of the components specified by <var>field-name</var>s for the
specified <var>window</var>. Allowable <var>field-name</var>s are a subset of
those for <code>x:window-set!</code>:
</p>
<ul>
<li> x:CW-Back-Pixel
</li><li> x:CW-Bit-Gravity
</li><li> x:CW-Win-Gravity
</li><li> x:CW-Backing-Store
</li><li> x:CW-Backing-Planes
</li><li> x:CW-Backing-Pixel
</li><li> x:CW-Override-Redirect
</li><li> x:CW-Save-Under
</li><li> x:CW-Event-Mask
</li><li> x:CW-Dont-Propagate
</li><li> x:CW-Colormap
</li></ul>
</dd></dl>
<hr size="6">
<a name="Window-Properties-and-Visibility"></a>
<a name="SEC6"></a>
<table cellpadding="1" cellspacing="1" border="0">
<tr><td valign="middle" align="left">[<a href="#SEC5" title="Previous section in reading order"> < </a>]</td>
<td valign="middle" align="left">[<a href="#SEC7" title="Next section in reading order"> > </a>]</td>
<td valign="middle" align="left"> </td>
<td valign="middle" align="left">[<a href="#SEC3" title="Beginning of this chapter or previous chapter"> << </a>]</td>
<td valign="middle" align="left">[<a href="#SEC3" title="Up section"> Up </a>]</td>
<td valign="middle" align="left">[<a href="#SEC7" title="Next chapter"> >> </a>]</td>
<td valign="middle" align="left"> </td>
<td valign="middle" align="left"> </td>
<td valign="middle" align="left"> </td>
<td valign="middle" align="left"> </td>
<td valign="middle" align="left">[<a href="#Top" title="Cover (top) of document">Top</a>]</td>
<td valign="middle" align="left">[<a href="#SEC_Contents" title="Table of contents">Contents</a>]</td>
<td valign="middle" align="left">[<a href="#SEC16" title="Index">Index</a>]</td>
<td valign="middle" align="left">[<a href="#SEC_About" title="About (help)"> ? </a>]</td>
</tr></table>
<h2 class="section"> 3.3 Window Properties and Visibility </h2>
<dl>
<dt><u>Function:</u> <b>x:get-window-property</b><i> window property </i>
<a name="IDX91"></a>
</dt>
<dd><p>Returns the (string or list of numbers) value of <var>property</var> of
<var>window</var>.
</p><dl>
<dt><u>Function:</u> <b>x:get-window-property</b><i> window property #t</i>
<a name="IDX92"></a>
</dt>
<dd><p>Removes and returns the (string or list of numbers) value of
<var>property</var> of <var>window</var>.
</p></dd></dl>
<dl>
<dt><u>Function:</u> <b>x:list-properties</b><i> window</i>
<a name="IDX93"></a>
</dt>
<dd><p>Returns a list of the properties (strings) defined for <var>window</var>.
</p></dd></dl>
<p>In X parlance, a window which is hidden even when not obscured by other
windows is <em>unmapped</em>; one which
<a name="IDX94"></a>
<a name="IDX95"></a>
<a name="IDX96"></a>
<a name="IDX97"></a>
shows is <em>mapped</em>. It is an unfortunate name-collision with Scheme,
and is ingrained in the attribute names.
</p>
<dl>
<dt><u>Function:</u> <b>x:map-window</b><i> window</i>
<a name="IDX98"></a>
</dt>
<dd><p>Maps the <var>window</var> and all of its subwindows that have had map
requests. Mapping a window that has an unmapped ancestor does not
display the window but marks it as eligible for display when the
ancestor becomes mapped. Such a window is called unviewable. When all
its ancestors are mapped, the window becomes viewable and will be
visible on the screen if it is not obscured by another window. This
function has no effect if the <var>window</var> is already mapped.
</p>
<p>If the override-redirect of the window is False and if some other client
has selected x:Substructure-Redirect-Mask on the parent window, then the X
server generates a MapRequest event, and the <code>x:map-window</code>
function does not map the <var>window</var>. Otherwise, the <var>window</var> is
mapped, and the X server generates a MapNotify event.
</p>
<p>If the <var>window</var> becomes viewable and no earlier contents for it are
remembered, the X server tiles the <var>window</var> with its background. If
the window's background is undefined, the existing screen contents are
not altered, and the X server generates zero or more x:Expose events. If
backing-store was maintained while the <var>window</var> was unmapped, no
x:Expose events are generated. If backing-store will now be maintained, a
full-window exposure is always generated. Otherwise, only visible
regions may be reported. Similar tiling and exposure take place for any
newly viewable inferiors.
</p>
<p>If the window is an Input-Output window, <code>x:map-window</code> generates
x:Expose events on each Input-Output window that it causes to be displayed.
If the client maps and paints the window and if the client begins
processing events, the window is painted twice. To avoid this, first
ask for x:Expose events and then map the window, so the client processes
input events as usual. The event list will include x:Expose for each
window that has appeared on the screen. The client's normal response to
an x:Expose event should be to repaint the window. This method usually
leads to simpler programs and to proper interaction with window
managers.
</p></dd></dl>
<dl>
<dt><u>Function:</u> <b>x:map-subwindows</b><i> window</i>
<a name="IDX99"></a>
</dt>
<dd><p>Maps all subwindows of a specified <var>window</var> in top-to-bottom
stacking order. The X server generates x:Expose events on each newly
displayed window. This may be much more efficient than mapping many
windows one at a time because the server needs to perform much of the
work only once, for all of the windows, rather than for each window.
</p></dd></dl>
<dl>
<dt><u>Function:</u> <b>x:unmap-window</b><i> window</i>
<a name="IDX100"></a>
</dt>
<dd><p>Unmaps the specified <var>window</var> and causes the X server to generate an
UnmapNotify event. If the specified <var>window</var> is already unmapped,
<code>x:unmap-window</code> has no effect. Normal exposure processing on
formerly obscured windows is performed. Any child window will no longer
be visible until another map call is made on the parent. In other
words, the subwindows are still mapped but are not visible until the
parent is mapped. Unmapping a <var>window</var> will generate x:Expose events
on windows that were formerly obscured by it.
</p></dd></dl>
<dl>
<dt><u>Function:</u> <b>x:unmap-subwindows</b><i> window</i>
<a name="IDX101"></a>
</dt>
<dd><p>Unmaps all subwindows for the specified <var>window</var> in bottom-to-top
stacking order. It causes the X server to generate an UnmapNotify event
on each subwindow and x:Expose events on formerly obscured windows. Using
this function is much more efficient than unmapping multiple windows one
at a time because the server needs to perform much of the work only
once, for all of the windows, rather than for each window.
</p></dd></dl>
</dd></dl>
<hr size="6">
<a name="Graphics-Context"></a>
<a name="SEC7"></a>
<table cellpadding="1" cellspacing="1" border="0">
<tr><td valign="middle" align="left">[<a href="#SEC6" title="Previous section in reading order"> < </a>]</td>
<td valign="middle" align="left">[<a href="#SEC9" title="Next section in reading order"> > </a>]</td>
<td valign="middle" align="left"> </td>
<td valign="middle" align="left">[<a href="#SEC3" title="Beginning of this chapter or previous chapter"> << </a>]</td>
<td valign="middle" align="left">[<a href="#Top" title="Up section"> Up </a>]</td>
<td valign="middle" align="left">[<a href="#SEC9" title="Next chapter"> >> </a>]</td>
<td valign="middle" align="left"> </td>
<td valign="middle" align="left"> </td>
<td valign="middle" align="left"> </td>
<td valign="middle" align="left"> </td>
<td valign="middle" align="left">[<a href="#Top" title="Cover (top) of document">Top</a>]</td>
<td valign="middle" align="left">[<a href="#SEC_Contents" title="Table of contents">Contents</a>]</td>
<td valign="middle" align="left">[<a href="#SEC16" title="Index">Index</a>]</td>
<td valign="middle" align="left">[<a href="#SEC_About" title="About (help)"> ? </a>]</td>
</tr></table>
<h1 class="chapter"> 4. Graphics Context </h1>
<p>Most attributes of graphics operations are stored in <em>GC</em>s. These
include line width, line style, plane mask, foreground, background,
tile, stipple, clipping region, end style, join style, and so on.
Graphics operations (for example, drawing lines) use these values to
determine the actual drawing operation.
</p>
<dl>
<dt><u>Function:</u> <b>x:create-gc</b><i> drawable field-name value …</i>
<a name="IDX102"></a>
</dt>
<dd><p>Creates and returns graphics context. The graphics context can be used
with any destination drawable having the same root and depth as the
specified <var>drawable</var>.
</p></dd></dl>
<dl>
<dt><u>Function:</u> <b>x:gc-set!</b><i> graphics-context field-name value …</i>
<a name="IDX103"></a>
</dt>
<dd><p>Changes the components specified by <var>field-name</var>s for the specified
<var>graphics-context</var>. The restrictions are the same as for
<code>x:create-gc</code>. The order in which components are verified and
altered is server dependent. If an error occurs, a subset of the
components may have been altered.
</p></dd></dl>
<dl>
<dt><u>Function:</u> <b>x:copy-gc-fields!</b><i> gcontext-src gcontext-dst field-name …</i>
<a name="IDX104"></a>
</dt>
<dd><p>Copies the components specified by <var>field-name</var>s from
<var>gcontext-src</var> to <var>gcontext-dst</var>. <var>Gcontext-src</var> and
<var>gcontext-dst</var> must have the same root and depth.
</p></dd></dl>
<dl>
<dt><u>Function:</u> <b>x:gc-ref</b><i> graphics-context field-name …</i>
<a name="IDX105"></a>
</dt>
<dd><p>Returns a list of the components specified by <var>field-name</var>s …
from the specified <var>graphics-context</var>.
</p></dd></dl>
<a name="SEC8"></a>
<h2 class="heading"> GC Attributes </h2>
<p>Both <code>x:create-gc</code> and <code>x:change-gc</code> take one argument
followed by pairs of arguments, where the first is one of the
property-name symbols (or its top-level value) listed below; and the
second is the value to associate with that property.
</p>
<dl>
<dt><u>Attribute:</u> <b>x:GC-Function</b>
<a name="IDX106"></a>
</dt>
<dd><p>The function attributes of a GC are used when you update a section of a
drawable (the destination) with bits from somewhere else (the source).
The function in a GC defines how the new destination bits are to be
computed from the source bits and the old destination bits. x:G-Xcopy is
typically the most useful because it will work on a color display, but
special applications may use other functions, particularly in concert
with particular planes of a color display. The 16 functions are:
</p>
<table><tr><td> </td><td><pre class="format"><tt>
x:G-Xclear 0
x:G-Xand (AND src dst)
x:G-Xand-Reverse (AND src (NOT dst))
x:G-Xcopy src
x:G-Xand-Inverted (AND (NOT src) dst)
x:G-Xnoop dst
x:G-Xxor (XOR src dst)
x:G-Xor (OR src dst)
x:G-Xnor (AND (NOT src) (NOT dst))
x:G-Xequiv (XOR (NOT src) dst)
x:G-Xinvert (NOT dst)
x:G-Xor-Reverse (OR src (NOT dst))
x:G-Xcopy-Inverted (NOT src)
x:G-Xor-Inverted (OR (NOT src) dst)
x:G-Xnand (OR (NOT src) (NOT dst))
x:G-Xset 1</tt>
</pre></td></tr></table></dd></dl>
<dl>
<dt><u>Attribute:</u> <b>x:GC-Plane-Mask</b>
<a name="IDX107"></a>
</dt>
<dd><p>Many graphics operations depend on either pixel values or planes in a
GC. The planes attribute is an integer which specifies which planes of
the destination are to be modified, one bit per plane. A monochrome
display has only one plane and will be the least significant bit of the
integer. As planes are added to the display hardware, they will occupy
more significant bits in the plane mask.
</p>
<p>In graphics operations, given a source and destination pixel, the result
is computed bitwise on corresponding bits of the pixels. That is, a
Boolean operation is performed in each bit plane. The plane-mask
restricts the operation to a subset of planes. <code>x:All-Planes</code> can be
used to refer to all planes of the screen simultaneously. The result is
computed by the following:
</p>
<table><tr><td> </td><td><pre class="format">(OR (AND (FUNC src dst) plane-mask) (AND dst (NOT plane-mask)))
</pre></td></tr></table>
<p>Range checking is not performed on a plane-mask value. It is simply
truncated to the appropriate number of bits.
</p></dd></dl>
<dl>
<dt><u>Attribute:</u> <b>x:GC-Foreground</b>
<a name="IDX108"></a>
</dt>
<dt><u>Attribute:</u> <b>x:GC-Background</b>
<a name="IDX109"></a>
</dt>
<dd><p>Range checking is not performed on the values for foreground or
background. They are simply truncated to the appropriate number of
bits.
</p>
<p>Note that foreground and background are not initialized to any values
likely to be useful in a window.
</p></dd></dl>
<dl>
<dt><u>Attribute:</u> <b>x:GC-Line-Width</b>
<a name="IDX110"></a>
</dt>
<dd><p>The line-width is measured in pixels and either can be greater than or
equal to one (wide line) or can be the special value zero (thin line).
</p>
<p>Thin lines (zero line-width) are one-pixel-wide lines drawn using an
unspecified, device-dependent algorithm. There are only two constraints
on this algorithm.
</p>
<ul>
<li>
If a line is drawn unclipped from [x1,y1] to [x2,y2] and if another line
is drawn unclipped from [x1+dx,y1+dy] to [x2+dx,y2+dy], a point [x,y] is
touched by drawing the first line if and only if the point [x+dx,y+dy]
is touched by drawing the second line.
</li><li>
The effective set of points comprising a line cannot be affected by
clipping. That is, a point is touched in a clipped line if and only if
the point lies inside the clipping region and the point would be touched
by the line when drawn unclipped.
</li></ul>
<p>A wide line drawn from [x1,y1] to [x2,y2] always draws the same pixels
as a wide line drawn from [x2,y2] to [x1,y1], not counting cap-style and
join-style. It is recommended that this property be true for thin
lines, but this is not required. A line-width of zero may differ from a
line-width of one in which pixels are drawn. This permits the use of
many manufacturers' line drawing hardware, which may run many times
faster than the more precisely specified wide lines.
</p>
<p>In general, drawing a thin line will be faster than drawing a wide line
of width one. However, because of their different drawing algorithms,
thin lines may not mix well aesthetically with wide lines. If it is
desirable to obtain precise and uniform results across all displays, a
client should always use a line-width of one rather than a linewidth of
zero.
</p></dd></dl>
<dl>
<dt><u>Attribute:</u> <b>x:GC-Line-Style</b>
<a name="IDX111"></a>
</dt>
<dd><p>The line-style defines which sections of a line are drawn:
</p>
<dl compact="compact">
<dt> <tt>x:Line-Solid</tt></dt>
<dd><p>The full path of the line is drawn.
</p></dd>
<dt> <tt>x:Line-Double-Dash</tt></dt>
<dd><p>The full path of the line is drawn, but the even dashes are filled
differently from the odd dashes (see fill-style) with x:Cap-Butt style used
where even and odd dashes meet.
</p></dd>
<dt> <tt>x:Line-On-Off-Dash</tt></dt>
<dd><p>Only the even dashes are drawn, and cap-style applies to all internal
ends of the individual dashes, except x:Cap-Not-Last is treated as x:Cap-Butt.
</p></dd>
</dl>
</dd></dl>
<dl>
<dt><u>Attribute:</u> <b>x:GC-Cap-Style</b>
<a name="IDX112"></a>
</dt>
<dd><p>The cap-style defines how the endpoints of a path are drawn:
</p>
<dl compact="compact">
<dt> <tt>x:Cap-Not-Last</tt></dt>
<dd><p>This is equivalent to x:Cap-Butt except that for a line-width of zero the
final endpoint is not drawn.
</p></dd>
<dt> <tt>x:Cap-Butt</tt></dt>
<dd><p>The line is square at the endpoint (perpendicular to the slope of the
line) with no projection beyond.
</p></dd>
<dt> <tt>x:Cap-Round</tt></dt>
<dd><p>The line has a circular arc with the diameter equal to the line-width,
centered on the endpoint. (This is equivalent to x:Cap-Butt for line-width
of zero).
</p></dd>
<dt> <tt>x:Cap-Projecting</tt></dt>
<dd><p>The line is square at the end, but the path continues beyond the
endpoint for a distance equal to half the line-width. (This is
equivalent to x:Cap-Butt for line-width of zero).
</p></dd>
</dl>
</dd></dl>
<dl>
<dt><u>Attribute:</u> <b>x:GC-Join-Style</b>
<a name="IDX113"></a>
</dt>
<dd><p>The join-style defines how corners are drawn for wide lines:
</p>
<dl compact="compact">
<dt> <tt>x:Join-Miter</tt></dt>
<dd><p>The outer edges of two lines extend to meet at an angle. However, if
the angle is less than 11 degrees, then a x:Join-Bevel join-style is used
instead.
</p></dd>
<dt> <tt>x:Join-Round</tt></dt>
<dd><p>The corner is a circular arc with the diameter equal to the
line-width, centered on the x:Join-point.
</p></dd>
<dt> <tt>x:Join-Bevel</tt></dt>
<dd><p>The corner has x:Cap-Butt endpoint styles with the triangular notch filled.
</p></dd>
</dl>
</dd></dl>
<dl>
<dt><u>Attribute:</u> <b>x:GC-Fill-Style</b>
<a name="IDX114"></a>
</dt>
<dd><p>The fill-style defines the contents of the source for line, text, and
fill requests. For all text and fill requests (for example,
X:Draw-Text, X:Fill-Rectangle, X:Fill-Polygon, and X:Fill-Arc); for line
requests with linestyle x:Line-Solid (for example, X:Draw-Line,
X:Draw-Segments, X:Draw-Rectangle, X:Draw-Arc); and for the even dashes
for line requests with line-style x:Line-On-Off-Dash or
x:Line-Double-Dash, the following apply:
</p>
<dl compact="compact">
<dt> <tt>x:Fill-Solid</tt></dt>
<dd><p>Foreground
</p></dd>
<dt> <tt>x:Fill-Tiled</tt></dt>
<dd><p>Tile
</p></dd>
<dt> <tt>x:Fill-Opaque-Stippled</tt></dt>
<dd><p>A tile with the same width and height as stipple, but with background
everywhere stipple has a zero and with foreground everywhere stipple has
a one
</p></dd>
<dt> <tt>x:Fill-Stippled</tt></dt>
<dd><p>Foreground masked by stipple
</p></dd>
</dl>
<p>When drawing lines with line-style x:Line-Double-Dash, the odd dashes
are controlled by the fill-style in the following manner:
</p>
<dl compact="compact">
<dt> <tt>x:Fill-Solid</tt></dt>
<dd><p>Background
</p></dd>
<dt> <tt>x:Fill-Tiled</tt></dt>
<dd><p>Same as for even dashes
</p></dd>
<dt> <tt>x:Fill-Opaque-Stippled</tt></dt>
<dd><p>Same as for even dashes
</p></dd>
<dt> <tt>x:Fill-Stippled</tt></dt>
<dd><p>Background masked by stipple
</p></dd>
</dl>
</dd></dl>
<dl>
<dt><u>Attribute:</u> <b>x:GC-Fill-Rule</b>
<a name="IDX115"></a>
</dt>
<dd><p>The fill-rule defines what pixels are inside (drawn) for paths given in
X:Fill-Polygon requests and can be set to x:Even-Odd-Rule or
x:Winding-Rule.
</p>
<dl compact="compact">
<dt> <tt>x:Even-Odd-Rule</tt></dt>
<dd><p>A point is inside if an infinite ray with the point as
origin crosses the path an odd number of times.
</p></dd>
<dt> <tt>x:Winding-Rule</tt></dt>
<dd><p>A point is inside if an infinite ray with the point as origin crosses an
unequal number of clockwise and counterclockwise directed path segments.
</p></dd>
</dl>
<p>A clockwise directed path segment is one that crosses the ray from left
to right as observed from the point. A counterclockwise segment is one
that crosses the ray from right to left as observed from the point. The
case where a directed line segment is coincident with the ray is
uninteresting because you can simply choose a different ray that is not
coincident with a segment.
</p>
<p>For both x:Even-Odd-Rule and x:Winding-Rule, a point is infinitely
small, and the path is an infinitely thin line. A pixel is inside if
the center point of the pixel is inside and the center point is not on
the boundary. If the center point is on the boundary, the pixel is
inside if and only if the polygon interior is immediately to its right
(x increasing direction). Pixels with centers on a horizontal edge are
a special case and are inside if and only if the polygon interior is
immediately below (y increasing direction).
</p></dd></dl>
<dl>
<dt><u>Attribute:</u> <b>x:GC-Tile</b>
<a name="IDX116"></a>
</dt>
<dt><u>Attribute:</u> <b>x:GC-Stipple</b>
<a name="IDX117"></a>
</dt>
<dd><p>The tile/stipple represents an infinite two-dimensional plane, with the
tile/stipple replicated in all dimensions.
</p>
<p>The tile pixmap must have the same root and depth as the GC, or an error
results. The stipple pixmap must have depth one and must have the same
root as the GC, or an error results. For stipple operations where the
fill-style is x:Fill-Stippled but not x:Fill-Opaque-Stippled, the
stipple pattern is tiled in a single plane and acts as an additional
clip mask to be ANDed with the clip-mask. Although some sizes may be
faster to use than others, any size pixmap can be used for tiling or
stippling.
</p></dd></dl>
<dl>
<dt><u>Attribute:</u> <b>x:GC-Tile-Stip-X-Origin</b>
<a name="IDX118"></a>
</dt>
<dt><u>Attribute:</u> <b>x:GC-Tile-Stip-Y-Origin</b>
<a name="IDX119"></a>
</dt>
<dd><p>When the tile/stipple plane is superimposed on a drawable for use in a
graphics operation, the upper-left corner of some instance of the
tile/stipple is at the coordinates within the drawable specified by the
tile/stipple origin. The tile/stipple origin is interpreted relative to
the origin of whatever destination drawable is specified in a graphics
request.
</p></dd></dl>
<dl>
<dt><u>Attribute:</u> <b>x:GC-Font</b>
<a name="IDX120"></a>
</dt>
<dd><p>The font to be used for drawing text.
</p></dd></dl>
<dl>
<dt><u>Attribute:</u> <b>x:GC-Subwindow-Mode</b>
<a name="IDX121"></a>
</dt>
<dd><p>You can set the subwindow-mode to x:Clip-By-Children or
x:Include-Inferiors.
</p><dl compact="compact">
<dt> <tt>x:Clip-By-Children</tt></dt>
<dd><p>Both source and destination windows are additionally clipped by all
viewable Input-Output children.
</p></dd>
<dt> <tt>x:Include-Inferiors</tt></dt>
<dd><p>Neither source nor destination window is clipped by inferiors. This
will result in including subwindow contents in the source and drawing
through subwindow boundaries of the destination. The use of
<code>x:Include-Inferiors</code> on a window of one depth with mapped
inferiors of differing depth is not illegal, but the semantics are
undefined by the core protocol.
</p></dd>
</dl>
</dd></dl>
<dl>
<dt><u>Attribute:</u> <b>x:GC-Graphics-Exposures</b>
<a name="IDX122"></a>
</dt>
<dd><p>The graphics-exposure flag controls x:Graphics-Expose event generation
for X:Copy-Area and X:Copy-Plane requests (and any similar requests
defined by extensions).
</p></dd></dl>
<dl>
<dt><u>Attribute:</u> <b>x:GC-Clip-X-Origin</b>
<a name="IDX123"></a>
</dt>
<dt><u>Attribute:</u> <b>x:GC-Clip-Y-Origin</b>
<a name="IDX124"></a>
</dt>
<dd><p>The clip-mask origin is interpreted relative to the origin of whatever
destination drawable is specified in a graphics request.
</p></dd></dl>
<dl>
<dt><u>Attribute:</u> <b>x:GC-Clip-Mask</b>
<a name="IDX125"></a>
</dt>
<dd><p>The clip-mask restricts writes to the destination drawable. If the
clip-mask is set to a pixmap, it must have depth one and have the same
root as the GC, or an error results. If clip-mask is set to
<a name="IDX126"></a>
<a name="IDX127"></a>
<em>x:None</em>, the pixels are always drawn regardless of the clip origin.
The clip-mask also can be set by calling <code>X:Set-Region</code>. Only
pixels where the clip-mask has a bit set to 1 are drawn. Pixels are not
drawn outside the area covered by the clip-mask or where the clip-mask
has a bit set to 0. The clip-mask affects all graphics requests. The
clip-mask does not clip sources. The clip-mask origin is interpreted
relative to the origin of whatever destination drawable is specified in
a graphics request.
</p></dd></dl>
<dl>
<dt><u>Attribute:</u> <b>x:GC-Dash-Offset</b>
<a name="IDX128"></a>
</dt>
<dd><p>Defines the phase of the pattern, specifying how many pixels into the
dash-list the pattern should actually begin in any single graphics
request. Dashing is continuous through path elements combined with a
join-style but is reset to the dash-offset between each sequence of
joined lines.
</p>
<p>The unit of measure for dashes is the same for the ordinary
coordinate system. Ideally, a dash length is measured along
the slope of the line, but implementations are only required
to match this ideal for horizontal and vertical lines.
Failing the ideal semantics, it is suggested that the length
be measured along the major axis of the line. The major
axis is defined as the x axis for lines drawn at an angle of
between -45 and +45 degrees or between 135 and 225 degrees
from the x axis. For all other lines, the major axis is the
y axis.
</p></dd></dl>
<dl>
<dt><u>Attribute:</u> <b>x:GC-Dash-List</b>
<a name="IDX129"></a>
</dt>
<dd><p>There must be at least one element in the specified <var>dash-list</var>.
The initial and alternating elements (second, fourth, and so on) of the
<var>dash-list</var> are the even dashes, and the others are the odd dashes.
Each element specifies a dash length in pixels. All of the elements
must be nonzero. Specifying an odd-length list is equivalent to
specifying the same list concatenated with itself to produce an
even-length list.
</p></dd></dl>
<dl>
<dt><u>Attribute:</u> <b>x:GC-Arc-Mode</b>
<a name="IDX130"></a>
</dt>
<dd><p>The arc-mode controls filling in the X:Fill-Arcs function and can be set
to x:Arc-Pie-Slice or x:Arc-Chord.
</p><dl compact="compact">
<dt> <tt>x:Arc-Pie-Slice</tt></dt>
<dd><p>The arcs are pie-slice filled.
</p></dd>
<dt> <tt>x:Arc-Chord</tt></dt>
<dd><p>The arcs are chord filled.
</p></dd>
</dl>
</dd></dl>
<hr size="6">
<a name="Cursor"></a>
<a name="SEC9"></a>
<table cellpadding="1" cellspacing="1" border="0">
<tr><td valign="middle" align="left">[<a href="#SEC7" title="Previous section in reading order"> < </a>]</td>
<td valign="middle" align="left">[<a href="#SEC10" title="Next section in reading order"> > </a>]</td>
<td valign="middle" align="left"> </td>
<td valign="middle" align="left">[<a href="#SEC7" title="Beginning of this chapter or previous chapter"> << </a>]</td>
<td valign="middle" align="left">[<a href="#Top" title="Up section"> Up </a>]</td>
<td valign="middle" align="left">[<a href="#SEC10" title="Next chapter"> >> </a>]</td>
<td valign="middle" align="left"> </td>
<td valign="middle" align="left"> </td>
<td valign="middle" align="left"> </td>
<td valign="middle" align="left"> </td>
<td valign="middle" align="left">[<a href="#Top" title="Cover (top) of document">Top</a>]</td>
<td valign="middle" align="left">[<a href="#SEC_Contents" title="Table of contents">Contents</a>]</td>
<td valign="middle" align="left">[<a href="#SEC16" title="Index">Index</a>]</td>
<td valign="middle" align="left">[<a href="#SEC_About" title="About (help)"> ? </a>]</td>
</tr></table>
<h1 class="chapter"> 5. Cursor </h1>
<dl>
<dt><u>Function:</u> <b>x:create-cursor</b><i> display shape</i>
<a name="IDX131"></a>
</dt>
<dd><p>X provides a set of standard cursor shapes in a special font named
<a name="IDX132"></a>
<em>cursor</em>. Applications are encouraged to use this interface for
their cursors because the font can be customized for the individual
display type. The <var>shape</var> argument specifies which glyph of the standard
fonts to use.
</p>
<p>The hotspot comes from the information stored in the cursor font. The
initial colors of a cursor are a black foreground and a white background
(see X:Recolor-Cursor). The names of all cursor shapes are defined with
the prefix XC: in <tt>`x11.scm'</tt>.
</p>
<dl>
<dt><u>Function:</u> <b>x:create-cursor</b><i> source-font source-char mask-font mask-char fgc bgc</i>
<a name="IDX133"></a>
</dt>
<dd><p>Creates a cursor from the source and mask bitmaps obtained from the
specified font glyphs. The integer <var>source-char</var> must be a defined
glyph in <var>source-font</var>. The integer <var>mask-char</var> must be a
defined glyph in <var>mask-font</var>. The origins of the <var>source-char</var>
and <var>mask-char</var> glyphs are positioned coincidently and define the
hotspot. The <var>source-char</var> and <var>mask-char</var> need not have the
same bounding box metrics, and there is no restriction on the placement
of the hotspot relative to the bounding boxes.
</p>
<dl>
<dt><u>Function:</u> <b>x:create-cursor</b><i> source-font source-char #f #f fgc bgc</i>
<a name="IDX134"></a>
</dt>
<dd><p>If <var>mask-font</var> and <var>mask-char</var> are #f, all pixels of the source
are displayed.
</p>
<dl>
<dt><u>Function:</u> <b>x:create-cursor</b><i> source-pixmap mask-pixmap fgc bgc origin</i>
<a name="IDX135"></a>
</dt>
<dd><p><var>mask-pixmap</var> must be the same size as the pixmap defined by the
<var>source-pixmap</var> argument. The foreground and background RGB values
must be specified using <var>foreground-color</var> and
<var>background-color</var>, even if the X server only has a x:Static-Gray or
x:Gray-Scale screen. The hotspot must be a point within the
<var>source-pixmap</var>.
</p>
<p><code>X:Create-Cursor</code> creates and returns a cursor. The
<var>foreground-color</var> is used for the pixels set to 1 in the source,
and the <var>background-color</var> is used for the pixels set to 0. Both
source and mask must have depth one but can have any root. The
<var>mask-pixmap</var> defines the shape of the cursor. The pixels set to 1
in <var>mask-pixmap</var> define which source pixels are displayed, and the
pixels set to 0 define which pixels are ignored.
</p>
<dl>
<dt><u>Function:</u> <b>x:create-cursor</b><i> source-pixmap #f fgc bgc origin</i>
<a name="IDX136"></a>
</dt>
<dd><p>If <var>mask-pixmap</var> is #f, all pixels of the source are displayed.
</p></dd></dl>
</dd></dl>
</dd></dl>
</dd></dl>
</dd></dl>
<hr size="6">
<a name="Colormap"></a>
<a name="SEC10"></a>
<table cellpadding="1" cellspacing="1" border="0">
<tr><td valign="middle" align="left">[<a href="#SEC9" title="Previous section in reading order"> < </a>]</td>
<td valign="middle" align="left">[<a href="#SEC11" title="Next section in reading order"> > </a>]</td>
<td valign="middle" align="left"> </td>
<td valign="middle" align="left">[<a href="#SEC9" title="Beginning of this chapter or previous chapter"> << </a>]</td>
<td valign="middle" align="left">[<a href="#Top" title="Up section"> Up </a>]</td>
<td valign="middle" align="left">[<a href="#SEC11" title="Next chapter"> >> </a>]</td>
<td valign="middle" align="left"> </td>
<td valign="middle" align="left"> </td>
<td valign="middle" align="left"> </td>
<td valign="middle" align="left"> </td>
<td valign="middle" align="left">[<a href="#Top" title="Cover (top) of document">Top</a>]</td>
<td valign="middle" align="left">[<a href="#SEC_Contents" title="Table of contents">Contents</a>]</td>
<td valign="middle" align="left">[<a href="#SEC16" title="Index">Index</a>]</td>
<td valign="middle" align="left">[<a href="#SEC_About" title="About (help)"> ? </a>]</td>
</tr></table>
<h1 class="chapter"> 6. Colormap </h1>
<p>A <em>colormap</em> maps pixel values to <em>RGB</em> color space values.
</p>
<dl>
<dt><u>Function:</u> <b>x:create-colormap</b><i> window visual alloc-policy</i>
<a name="IDX137"></a>
</dt>
<dd><p><var>window</var> specifies the window on whose screen you want to create a
colormap. <var>visual</var> specifies a visual type supported on the screen.
<var>alloc-policy</var> Specifies the colormap entries to be allocated. You
can pass <code>X:Alloc-None</code> or <code>X:Alloc-All</code>.
</p>
<p>The <code>X:Create-Colormap</code> function creates and returns a colormap of
the specified <var>visual</var> type for the screen on which <var>window</var>
resides. Note that <var>window</var> is used only to determine the screen.
</p>
<dl compact="compact">
<dt> <samp>`X:Gray-Scale'</samp></dt>
<dt> <samp>`X:Pseudo-Color'</samp></dt>
<dt> <samp>`X:Direct-Color'</samp></dt>
<dd><p>The initial values of the colormap entries are undefined.
</p>
</dd>
<dt> <samp>`X:Static-Gray'</samp></dt>
<dt> <samp>`X:Static-Color'</samp></dt>
<dt> <samp>`X:True-Color'</samp></dt>
<dd><p>The entries have defined values, but those values are specific to
<var>visual</var> and are not defined by X. The <var>alloc-policy</var> must be
<samp>`X:Alloc-None'</samp>.
</p>
</dd>
</dl>
<p>For the other visual classes, if <var>alloc-policy</var> is
<samp>`X:Alloc-None'</samp>, the colormap initially has no allocated entries,
and clients can allocate them.
</p>
<p>If <var>alloc-policy</var> is <samp>`X:Alloc-All'</samp>, the entire colormap is
allocated writable. The initial values of all allocated entries are
undefined.
</p>
<dl compact="compact">
<dt> <samp>`X:Gray-Scale'</samp></dt>
<dt> <samp>`X:Pseudo-Color'</samp></dt>
<dd><p>The effect is as if an <code>XAllocColorCells</code> call returned all pixel
values from zero to N - 1, where N is the colormap entries value in
<var>visual</var>.
</p>
</dd>
<dt> <samp>`X:Direct-Color'</samp></dt>
<dd><p>The effect is as if an <code>XAllocColorPlanes</code> call returned a pixel
value of zero and red_mask, green_mask, and blue_mask values containing
the same bits as the corresponding masks in the specified visual.
</p></dd>
</dl>
</dd></dl>
<p>To create a new colormap when the allocation out of a previously
shared colormap has failed because of resource exhaustion, use:
</p>
<dl>
<dt><u>Function:</u> <b>x:copy-colormap-and-free</b><i> colormap</i>
<a name="IDX138"></a>
</dt>
<dd><p>Creates and returns a colormap of the same visual type and for the same
screen as the specified <var>colormap</var>. It also moves all of the
client's existing allocation from the specified <var>colormap</var> to the
new colormap with their color values intact and their read-only or
writable characteristics intact and frees those entries in the specified
colormap. Color values in other entries in the new colormap are
undefined. If the specified colormap was created by the client with
alloc set to <samp>`X:Alloc-All'</samp>, the new colormap is also created with
<samp>`X:Alloc-All'</samp>, all color values for all entries are copied from the
specified <var>colormap</var>, and then all entries in the specified
<var>colormap</var> are freed. If the specified <var>colormap</var> was not
created by the client with <samp>`X:Alloc-All'</samp>, the allocations to be moved
are all those pixels and planes that have been allocated by the client
and that have not been freed since they were allocated.
</p>
</dd></dl>
<p>A <em>colormap</em> maps pixel values to elements of the <em>RGB</em>
datatype. An <var>RGB</var> is a list or vector of 3 integers, describing
the red, green, and blue intensities respectively. The integers are in
the range 0 - 65535.
</p>
<dl>
<dt><u>Function:</u> <b>x:alloc-colormap-cells</b><i> colormap ncolors nplanes</i>
<a name="IDX139"></a>
</dt>
<dt><u>Function:</u> <b>x:alloc-colormap-cells</b><i> colormap ncolors nplanes contiguous?</i>
<a name="IDX140"></a>
</dt>
<dd><p>The <code>X:Alloc-Color-Cells</code> function allocates read/write color
cells. The number of colors, <var>ncolors</var> must be positive and the
number of planes, <var>nplanes</var> nonnegative. If <var>ncolors</var> and
nplanes are requested, then <var>ncolors</var> pixels and nplane plane masks
are returned. No mask will have any bits set to 1 in common with any
other mask or with any of the pixels. By ORing together each pixel with
zero or more masks, <var>ncolors</var> * 2^<var>nplanes</var> distinct pixels can
be produced. All of these are allocated writable by the request.
</p>
<dl compact="compact">
<dt> <samp>`x:Gray-Scale'</samp></dt>
<dt> <samp>`x:Pseudo-Color'</samp></dt>
<dd><p>Each mask has exactly one bit set to 1. If <var>contiguous?</var> is
non-false and if all masks are ORed together, a single contiguous set of
bits set to 1 is formed.
</p></dd>
<dt> <samp>`x:Direct-Color'</samp></dt>
<dd><p>Each mask has exactly three bits set to 1. If <var>contiguous?</var> is
non-false and if all masks are ORed together, three contiguous sets of
bits set to 1 (one within each pixel subfield) is formed.
</p></dd>
</dl>
<p>The RGB values of the allocated entries are undefined.
<code>X:Alloc-Color-Cells</code> returns a list of two uniform arrays if it
succeeded or #f if it failed. The first array has the pixels allocated
and the second has the plane-masks.
</p>
<dl>
<dt><u>Function:</u> <b>x:alloc-colormap-cells</b><i> colormap ncolors rgb</i>
<a name="IDX141"></a>
</dt>
<dt><u>Function:</u> <b>x:alloc-colormap-cells</b><i> colormap ncolors rgb contiguous?</i>
<a name="IDX142"></a>
</dt>
<dd><p>The specified <var>ncolors</var> must be positive; and <var>rgb</var> a list or
vector of 3 nonnegative integers. If <var>ncolors</var> colors, <var>nreds</var>
reds, <var>ngreens</var> greens, and <var>nblues</var> blues are requested,
<var>ncolors</var> pixels are returned; and the masks have <var>nreds</var>,
<var>ngreens</var>, and <var>nblues</var> bits set to 1, respectively. If
<var>contiguous?</var> is non-false, each mask will have a contiguous set of
bits set to 1. No mask will have any bits set to 1 in common with any
other mask or with any of the pixels.
</p>
<p>Each mask will lie within the corresponding pixel subfield. By ORing
together subsets of masks with each pixel value, <var>ncolors</var> *
2(<var>nreds</var>+<var>ngreens</var>+<var>nblues</var>) distinct pixel values can be
produced. All of these are allocated by the request. However, in the
colormap, there are only <var>ncolors</var> * 2^<var>nreds</var> independent red
entries, <var>ncolors</var> * 2^<var>ngreens</var> independent green entries, and
<var>ncolors</var> * 2^<var>nblues</var> independent blue entries.
</p>
<p><code>X:Alloc-Color-Cells</code> returns a list if it succeeded or #f if it
failed. The first element of the list has an array of the pixels
allocated. The second, third, and fourth elements are the red, green,
and blue plane-masks.
</p></dd></dl>
<dl>
<dt><u>Function:</u> <b>x:free-colormap-cells</b><i> colormap pixels planes</i>
<a name="IDX143"></a>
</dt>
<dt><u>Function:</u> <b>x:free-colormap-cells</b><i> colormap pixels</i>
<a name="IDX144"></a>
</dt>
<dd><p>Frees the cells represented by pixels whose values are in the
<var>pixels</var> unsigned-integer uniform-vector. The <var>planes</var> argument
should not have any bits set to 1 in common with any of the pixels. The
set of all pixels is produced by ORing together subsets of the
<var>planes</var> argument with the pixels. The request frees all of these
pixels that were allocated by the client. Note that freeing an
individual pixel obtained from <code>X:Alloc-Colormap-Cells</code> with a
planes argument may not actually allow it to be reused until all of its
related pixels are also freed. Similarly, a read-only entry is not
actually freed until it has been freed by all clients, and if a client
allocates the same read-only entry multiple times, it must free the
entry that many times before the entry is actually freed.
</p>
<p>All specified pixels that are allocated by the client in the
<var>colormap</var> are freed, even if one or more pixels produce an error.
It is an error if a specified pixel is not allocated by the client (that
is, is unallocated or is only allocated by another client) or if the
colormap was created with all entries writable (by passing
<samp>`x:Alloc-All'</samp> to <code>X:Create-Colormap</code>). If more than one pixel
is in error, the one that gets reported is arbitrary.
</p></dd></dl>
<dl>
<dt><u>Function:</u> <b>x:colormap-find-color</b><i> colormap rgb</i>
<a name="IDX145"></a>
</dt>
<dd><p><var>rgb</var> is a list or vector of 3 integers, describing the red, green,
and blue intensities respectively; or an integer <samp>`#x<i>rrggbb</i>'</samp>,
packing red, green and blue intensities in the range 0 - 255.
</p>
<dl>
<dt><u>Function:</u> <b>x:colormap-find-color</b><i> colormap color-name</i>
<a name="IDX146"></a>
</dt>
<dd><p>The case-insensitive string <var>color_name</var> specifies the name of a
color (for example, <tt>`red'</tt>)
</p>
<p><code>X:Colormap-Find-Color</code> allocates a read-only colormap entry
corresponding to the closest RGB value supported by the hardware.
<code>X:Colormap-Find-Color</code> returns the pixel value of the color
closest to the specified <var>RGB</var> or <var>color_name</var> elements
supported by the hardware, if successful; otherwise
<code>X:Colormap-Find-Color</code> returns #f.
</p>
<p>Multiple clients that request the same effective RGB value can
be assigned the same read-only entry, thus allowing entries to be
shared. When the last client deallocates a shared cell, it is
deallocated.
</p>
</dd></dl>
<dl>
<dt><u>Function:</u> <b>x:color-ref</b><i> colormap pixel</i>
<a name="IDX147"></a>
</dt>
<dd><p>Returns a list of 3 integers, describing the red, green,
and blue intensities respectively of the <var>colormap</var> entry of the
cell indexed by <var>pixel</var>.
</p>
<p>The integer <var>pixel</var> must be a valid index into <var>colormap</var>.
</p></dd></dl>
<dl>
<dt><u>Function:</u> <b>X:Color-Set!</b><i> colormap pixel rgb</i>
<a name="IDX148"></a>
</dt>
<dd><p><var>rgb</var> is a list or vector of 3 integers, describing the red, green,
and blue intensities respectively; or an integer <samp>`#x<i>rrggbb</i>'</samp>,
packing red, green and blue intensities in the range 0 - 255.
</p>
<dl>
<dt><u>Function:</u> <b>X:Color-Set!</b><i> colormap pixel color-name</i>
<a name="IDX149"></a>
</dt>
<dd><p>The case-insensitive string <var>color_name</var> specifies the name of a
color (for example, <tt>`red'</tt>)
</p>
<p>The integer <var>pixel</var> must be a valid index into <var>colormap</var>.
</p>
<p><code>X:Color-Set!</code> changes the <var>colormap</var> entry of the read/write
cell indexed by <var>pixel</var>. If the <var>colormap</var> is an installed map
for its screen, the changes are visible immediately.
</p>
</dd></dl>
<dl>
<dt><u>Function:</u> <b>x:install-colormap</b><i> colormap</i>
<a name="IDX150"></a>
</dt>
<dd><p>Installs the specified <var>colormap</var> for its associated screen. All
windows associated with <var>colormap</var> immediately display with true
colors. A colormap is associated with a window when the window is
created or its attributes changed.
</p>
<p>If the specified colormap is not already an installed colormap, the X
server generates a ColormapNotify event on each window that has that
colormap.
</p>
</dd></dl>
<dl>
<dt><u>Function:</u> <b>x:ccc</b><i> colormap</i>
<a name="IDX151"></a>
</dt>
<dd><p>Returns the Color-Conversion-Context of <var>colormap</var>.
</p></dd></dl>
</dd></dl>
</dd></dl>
</dd></dl>
<hr size="6">
<a name="Rendering"></a>
<a name="SEC11"></a>
<table cellpadding="1" cellspacing="1" border="0">
<tr><td valign="middle" align="left">[<a href="#SEC10" title="Previous section in reading order"> < </a>]</td>
<td valign="middle" align="left">[<a href="#SEC14" title="Next section in reading order"> > </a>]</td>
<td valign="middle" align="left"> </td>
<td valign="middle" align="left">[<a href="#SEC10" title="Beginning of this chapter or previous chapter"> << </a>]</td>
<td valign="middle" align="left">[<a href="#Top" title="Up section"> Up </a>]</td>
<td valign="middle" align="left">[<a href="#SEC14" title="Next chapter"> >> </a>]</td>
<td valign="middle" align="left"> </td>
<td valign="middle" align="left"> </td>
<td valign="middle" align="left"> </td>
<td valign="middle" align="left"> </td>
<td valign="middle" align="left">[<a href="#Top" title="Cover (top) of document">Top</a>]</td>
<td valign="middle" align="left">[<a href="#SEC_Contents" title="Table of contents">Contents</a>]</td>
<td valign="middle" align="left">[<a href="#SEC16" title="Index">Index</a>]</td>
<td valign="middle" align="left">[<a href="#SEC_About" title="About (help)"> ? </a>]</td>
</tr></table>
<h1 class="chapter"> 7. Rendering </h1>
<dl>
<dt><u>Function:</u> <b>x:flush</b><i> display</i>
<a name="IDX152"></a>
</dt>
<dt><u>Function:</u> <b>x:flush</b><i> window</i>
<a name="IDX153"></a>
</dt>
<dd><p>Flushes the output buffer. Some client applications need not use this
function because the output buffer is automatically flushed as needed by
calls to X:Pending, X:Next-Event, and X:Window-Event. Events generated
by the server may be enqueued into the library's event queue.
</p>
<dl>
<dt><u>Function:</u> <b>x:flush</b><i> gc</i>
<a name="IDX154"></a>
</dt>
<dd><p>Forces sending of GC component changes.
</p>
<p>Xlib usually defers sending changes to the components of a GC to the
server until a graphics function is actually called with that GC. This
permits batching of component changes into a single server request. In
some circumstances, however, it may be necessary for the client to
explicitly force sending the changes to the server. An example might be
when a protocol extension uses the GC indirectly, in such a way that the
extension interface cannot know what GC will be used.
</p></dd></dl>
<dl>
<dt><u>Function:</u> <b>x:clear-area</b><i> window (x-pos y-pos) (width height) expose?</i>
<a name="IDX155"></a>
</dt>
<dd><p>Paints a rectangular area in the specified <var>window</var> according to the
specified dimensions with the <var>window</var>'s background pixel or pixmap.
The subwindow-mode effectively is <samp>`x:Clip-By-Children'</samp>. If width
is zero, it is replaced with the current width of the <var>window</var> minus
x. If height is zero, it is replaced with the current height of the
<var>window</var> minus y. If the <var>window</var> has a defined background
tile, the rectangle clipped by any children is filled with this tile.
If the <var>window</var> has background x:None, the contents of the
<var>window</var> are not changed. In either case, if <var>expose?</var> is True,
one or more x:Expose events are generated for regions of the rectangle
that are either visible or are being retained in a backing store. If
you specify a <var>window</var> whose class is x:Input-Only, an error
results.
</p></dd></dl>
<dl>
<dt><u>Function:</u> <b>x:fill-rectangle</b><i> window gcontext position size</i>
<a name="IDX156"></a>
</dt>
</dl>
</dd></dl>
<a name="SEC12"></a>
<h2 class="heading"> Draw Strings </h2>
<dl>
<dt><u>Function:</u> <b>x:draw-string</b><i> drawable gc position string</i>
<a name="IDX157"></a>
</dt>
<dd><p><var>Position</var> specifies coordinates relative to the origin of
<var>drawable</var> of the origin of the first character to be drawn.
</p>
<p><code>x:draw-string</code> draws the characters of <var>string</var>, starting at
<var>position</var>.
</p></dd></dl>
<dl>
<dt><u>Function:</u> <b>x:image-string</b><i> drawable gc position string</i>
<a name="IDX158"></a>
</dt>
<dd><p><var>Position</var> specifies coordinates relative to the origin of
<var>drawable</var> of the origin of the first character to be drawn.
</p>
<p><code>x:image-string</code> draws the characters <em>and background</em> of
<var>string</var>, starting at <var>position</var>.
</p></dd></dl>
<a name="SEC13"></a>
<h2 class="heading"> Draw Shapes </h2>
<dl>
<dt><u>Function:</u> <b>x:draw-points</b><i> drawable gc position …</i>
<a name="IDX159"></a>
</dt>
<dd><p><var>Position</var> … specifies coordinates of the point to be drawn.
</p>
<dl>
<dt><u>Function:</u> <b>x:draw-points</b><i> drawable gc x y …</i>
<a name="IDX160"></a>
</dt>
<dd><p>(<var>x</var>, <var>y</var>) … specifies coordinates of the point to be
drawn.
</p>
<dl>
<dt><u>Function:</u> <b>x:draw-points</b><i> drawable gc point-array</i>
<a name="IDX161"></a>
</dt>
<dd><p><var>point-array</var> is a uniform short array of rank 2, whose rightmost
index spans a range of 2.
</p>
<p>The <code>X:Draw-Points</code> procedure uses the foreground pixel and
function components of the <var>gc</var> to draw points into <var>drawable</var>
at the positions (relative to the origin of <var>drawable</var>) specified.
</p>
<p><code>X:Draw-Points</code> uses these <var>gc</var> components: function,
planemask, foreground, subwindow-mode, clip-x-origin, clip-y-origin, and
clip-mask.
</p></dd></dl>
<dl>
<dt><u>Function:</u> <b>x:draw-segments</b><i> drawable gc pos1 pos2 …</i>
<a name="IDX162"></a>
</dt>
<dd><p><var>Pos1</var>, <var>pos2</var>, … specify coordinates to be connected by
segments.
</p>
<dl>
<dt><u>Function:</u> <b>x:draw-segments</b><i> drawable gc x1 y1 x2 y2 …</i>
<a name="IDX163"></a>
</dt>
<dd><p>(<var>x1</var>, <var>y1</var>), (<var>x2</var>, <var>y2</var>) … specify coordinates
to be connected by segments.
</p>
<dl>
<dt><u>Function:</u> <b>x:draw-segments</b><i> drawable gc point-array</i>
<a name="IDX164"></a>
</dt>
<dd><p><var>point-array</var> is a uniform short array of rank 2, whose rightmost
index spans a range of 2.
</p>
<p>The <code>X:Draw-Segments</code> procedure uses the components of the
specified <var>gc</var> to draw multiple unconnected lines between disjoint
adjacent pair of points passed as arguments. It draws the segments in
order and does not perform joining at coincident endpoints. For any
given line, <code>X:Draw-Segments</code> does not draw a pixel more than once.
If thin (zero line-width) segments intersect, the intersecting pixels
are drawn multiple times. If wide segments intersect, the intersecting
pixels are drawn only once, as though the entire PolyLine protocol
request were a single, filled shape. <code>X:Draw-Segments</code> treats all
coordinates as relative to the origin of <var>drawable</var>.
</p>
<p><code>X:Draw-Segments</code> uses these <var>gc</var> components: function,
plane-mask, line-width, line-style, cap-style, fill-style,
subwindow-mode, clip-x-origin, clip-y-origin, and clip-mask, join-style.
It also use these <var>gc</var> mode-dependent components: foreground,
background, tile, stipple, tilestipple-x-origin, tile-stipple-y-origin,
dash-offset, and dash-list.
</p></dd></dl>
<dl>
<dt><u>Function:</u> <b>x:draw-lines</b><i> drawable gc pos1 pos2 …</i>
<a name="IDX165"></a>
</dt>
<dd><p><var>Pos1</var>, <var>pos2</var>, … specify coordinates to be connected by
lines.
</p>
<dl>
<dt><u>Function:</u> <b>x:draw-lines</b><i> drawable gc x1 y1 x2 y2 …</i>
<a name="IDX166"></a>
</dt>
<dd><p>(<var>x1</var>, <var>y1</var>), (<var>x2</var>, <var>y2</var>) … specify coordinates
to be connected by lines.
</p>
<dl>
<dt><u>Function:</u> <b>x:draw-lines</b><i> drawable gc point-array</i>
<a name="IDX167"></a>
</dt>
<dd><p><var>point-array</var> is a uniform short array of rank 2, whose rightmost
index spans a range of 2.
</p>
<p>The <code>X:Draw-Lines</code> procedure uses the components of the specified
<var>gc</var> to draw lines between each adjacent pair of points passed as
arguments. It draws the lines in order. The lines join correctly at
all intermediate points, and if the first and last points coincide, the
first and last lines also join correctly. For any given line,
<code>X:Draw-Lines</code> does not draw a pixel more than once. If thin (zero
line-width) lines intersect, the intersecting pixels are drawn multiple
times. If wide lines intersect, the intersecting pixels are drawn only
once, as though the entire PolyLine protocol request were a single,
filled shape. <code>X:Draw-Lines</code> treats all coordinates as relative to
the origin of <var>drawable</var>.
</p>
<p><code>X:Draw-Lines</code> uses these <var>gc</var> components: function,
plane-mask, line-width, line-style, cap-style, fill-style,
subwindow-mode, clip-x-origin, clip-y-origin, and clip-mask, join-style.
It also use these <var>gc</var> mode-dependent components: foreground,
background, tile, stipple, tilestipple-x-origin, tile-stipple-y-origin,
dash-offset, and dash-list.
</p></dd></dl>
<dl>
<dt><u>Function:</u> <b>x:fill-polygon</b><i> drawable gc pos1 pos2 …</i>
<a name="IDX168"></a>
</dt>
<dd><p><var>Pos1</var>, <var>pos2</var>, … specify coordinates of the border path.
</p>
<dl>
<dt><u>Function:</u> <b>x:fill-polygon</b><i> drawable gc x1 y1 x2 y2 …</i>
<a name="IDX169"></a>
</dt>
<dd><p>(<var>x1</var>, <var>y1</var>), (<var>x2</var>, <var>y2</var>) … specify coordinates
of the border path.
</p>
<dl>
<dt><u>Function:</u> <b>x:fill-polygon</b><i> drawable gc point-array</i>
<a name="IDX170"></a>
</dt>
<dd><p><var>point-array</var> is a uniform short array of rank 2, whose rightmost
index spans a range of 2.
</p>
<p>The path is closed automatically if the last point in the list or
<var>point-array</var> does not coincide with the first point.
</p>
<p>The <code>X:Fill-Polygon</code> procedure uses the components of the specified
<var>gc</var> to fill the region closed by the specified path.
<code>X:Fill-Polygon</code> does not draw a pixel of the region more than
once. <code>X:Fill-Polygon</code> treats all coordinates as relative to the
origin of <var>drawable</var>.
</p>
<p><code>X:Fill-Polygon</code> uses these <var>gc</var> components: function,
planemask, fill-style, fill-rule, subwindow-mode, clip-x-origin,
clip-y-origin, and clip-mask. It also use these <var>gc</var> mode-dependent
components: foreground, background, tile, stipple,
tile-stipple-x-origin, and tile-stipple-y-origin.
</p></dd></dl>
</dd></dl>
</dd></dl>
</dd></dl>
</dd></dl>
</dd></dl>
</dd></dl>
</dd></dl>
</dd></dl>
<hr size="6">
<a name="Images"></a>
<a name="SEC14"></a>
<table cellpadding="1" cellspacing="1" border="0">
<tr><td valign="middle" align="left">[<a href="#SEC11" title="Previous section in reading order"> < </a>]</td>
<td valign="middle" align="left">[<a href="#SEC15" title="Next section in reading order"> > </a>]</td>
<td valign="middle" align="left"> </td>
<td valign="middle" align="left">[<a href="#SEC11" title="Beginning of this chapter or previous chapter"> << </a>]</td>
<td valign="middle" align="left">[<a href="#Top" title="Up section"> Up </a>]</td>
<td valign="middle" align="left">[<a href="#SEC15" title="Next chapter"> >> </a>]</td>
<td valign="middle" align="left"> </td>
<td valign="middle" align="left"> </td>
<td valign="middle" align="left"> </td>
<td valign="middle" align="left"> </td>
<td valign="middle" align="left">[<a href="#Top" title="Cover (top) of document">Top</a>]</td>
<td valign="middle" align="left">[<a href="#SEC_Contents" title="Table of contents">Contents</a>]</td>
<td valign="middle" align="left">[<a href="#SEC16" title="Index">Index</a>]</td>
<td valign="middle" align="left">[<a href="#SEC_About" title="About (help)"> ? </a>]</td>
</tr></table>
<h1 class="chapter"> 8. Images </h1>
<dl>
<dt><u>Function:</u> <b>x:read-bitmap-file</b><i> drawable file</i>
<a name="IDX171"></a>
</dt>
</dl>
<hr size="6">
<a name="Event"></a>
<a name="SEC15"></a>
<table cellpadding="1" cellspacing="1" border="0">
<tr><td valign="middle" align="left">[<a href="#SEC14" title="Previous section in reading order"> < </a>]</td>
<td valign="middle" align="left">[<a href="#SEC16" title="Next section in reading order"> > </a>]</td>
<td valign="middle" align="left"> </td>
<td valign="middle" align="left">[<a href="#SEC14" title="Beginning of this chapter or previous chapter"> << </a>]</td>
<td valign="middle" align="left">[<a href="#Top" title="Up section"> Up </a>]</td>
<td valign="middle" align="left">[<a href="#SEC16" title="Next chapter"> >> </a>]</td>
<td valign="middle" align="left"> </td>
<td valign="middle" align="left"> </td>
<td valign="middle" align="left"> </td>
<td valign="middle" align="left"> </td>
<td valign="middle" align="left">[<a href="#Top" title="Cover (top) of document">Top</a>]</td>
<td valign="middle" align="left">[<a href="#SEC_Contents" title="Table of contents">Contents</a>]</td>
<td valign="middle" align="left">[<a href="#SEC16" title="Index">Index</a>]</td>
<td valign="middle" align="left">[<a href="#SEC_About" title="About (help)"> ? </a>]</td>
</tr></table>
<h1 class="chapter"> 9. Event </h1>
<p>These three status routines always return immediately if there are
events already in the queue.
</p>
<dl>
<dt><u>Function:</u> <b>x:q-length</b><i> display</i>
<a name="IDX172"></a>
</dt>
<dd><p>Returns the length of the event queue for the connected <var>display</var>.
Note that there may be more events that have not been read into the
queue yet (see X:Events-Queued).
</p></dd></dl>
<dl>
<dt><u>Function:</u> <b>x:pending</b><i> display</i>
<a name="IDX173"></a>
</dt>
<dd><p>Returns the number of events that have been received from the X server
but have not been removed from the event queue.
</p></dd></dl>
<dl>
<dt><u>Function:</u> <b>x:events-queued</b><i> display</i>
<a name="IDX174"></a>
</dt>
<dd><p>Returns the number of events already in the queue if the number is
nonzero. If there are no events in the queue, <code>X:Events-Queued</code>
attempts to read more events out of the application's connection without
flushing the output buffer and returns the number read.
</p></dd></dl>
<p>Both of these routines return an object of type <em>event</em>.
</p>
<dl>
<dt><u>Function:</u> <b>x:next-event</b><i> display</i>
<a name="IDX175"></a>
</dt>
<dd><p>Removes and returns the first event from the event queue. If the event
queue is empty, <code>X:Next-Event</code> flushes the output buffer and blocks
until an event is received.
</p></dd></dl>
<dl>
<dt><u>Function:</u> <b>x:peek-event</b><i> display</i>
<a name="IDX176"></a>
</dt>
<dd><p>Returns the first event from the event queue, but it does not remove the
event from the queue. If the queue is empty, <code>X:Peek-Event</code>
flushes the output buffer and blocks until an event is received.
</p></dd></dl>
<p>Each event object has fields dependent on its sub-type.
</p>
<dl>
<dt><u>Function:</u> <b>x:event-ref</b><i> event field-name</i>
<a name="IDX177"></a>
</dt>
<dd><table>
<tr><td><p> window
</p></td><td>
<p>The window on which <var>event</var> was generated and is referred to as the
event window.
</p></td></tr>
<tr><td><p> root
</p></td><td>
<p>is the event window's root window.
</p></td></tr>
<tr><td><p> subwindow
</p></td><td>
<p>If the source window is an inferior of the event window, the
<var>subwindow</var> is the child of the event window that is the source
window or the child of the event window that is an ancestor of the
source window. Otherwise, <samp>`None'</samp>.
</p></td></tr>
<tr><td><p> X-event:type
</p></td><td>
<p>An integer: <var>x:Key-Press</var>, <var>x:Key-Release</var>,
<var>x:Button-Press</var>, <var>x:Button-Release</var>, <var>x:Motion-Notify</var>,
<var>x:Enter-Notify</var>, <var>x:Leave-Notify</var>, <var>x:Focus-In</var>,
<var>x:Focus-Out</var>, <var>x:Keymap-Notify</var>, <var>x:Expose</var>,
<var>x:Graphics-Expose</var>, <var>x:No-Expose</var>, <var>x:Visibility-Notify</var>,
<var>x:Create-Notify</var>, <var>x:Destroy-Notify</var>, <var>x:Unmap-Notify</var>,
<var>x:Map-Notify</var>, <var>x:Map-Request</var>, <var>x:Reparent-Notify</var>,
<var>x:Configure-Notify</var>, <var>x:Configure-Request</var>,
<var>x:Gravity-Notify</var>, <var>x:Resize-Request</var>,
<var>x:Circulate-Notify</var>, <var>x:Circulate-Request</var>,
<var>x:Property-Notify</var>, <var>x:Selection-Clear</var>,
<var>x:Selection-Request</var>, <var>x:Selection-Notify</var>,
<var>x:Colormap-Notify</var>, <var>x:Client-Message</var>, or
<var>x:Mapping-Notify</var>.
</p></td></tr>
<tr><td><p> X-event:serial
</p></td><td>
<p>The serial number of the protocol request that generated the <var>event</var>.
</p></td></tr>
<tr><td><p> X-event:send-event
</p></td><td>
<p>Boolean that indicates whether the event was sent by a different client.
</p></td></tr>
<tr><td><p> X-event:time
</p></td><td>
<p>The time when the <var>event</var> was generated expressed in milliseconds.
</p></td></tr>
<tr><td><p> X-event:x
</p></td></tr>
<tr><td><p> X-event:y
</p></td><td>
<p>For window entry/exit events the <var>x</var> and <var>y</var> members are set to
the coordinates of the pointer position in the event window. This
position is always the pointer's final position, not its initial
position. If the event window is on the same screen as the root window,
<var>x</var> and <var>y</var> are the pointer coordinates relative to the event
window's origin. Otherwise, <var>x</var> and <var>y</var> are set to zero.
</p>
<p>For expose events The <var>x</var> and <var>y</var> members are set to the
coordinates relative to the drawable's origin and indicate the
upper-left corner of the rectangle.
</p>
<p>For configure, create, gravity, and reparent events the <var>x</var> and
<var>y</var> members are set to the window's coordinates relative to the
parent window's origin and indicate the position of the upper-left
outside corner of the created window.
</p></td></tr>
<tr><td><p> X-event:x-root
</p></td></tr>
<tr><td><p> X-event:y-root
</p></td><td>
<p>The pointer's coordinates relative to the root window's origin at the
time of the <var>event</var>.
</p></td></tr>
<tr><td><p> X-event:state
</p></td><td>
<p>For keyboard, pointer and window entry/exit events, the state member is
set to indicate the logical state of the pointer buttons and modifier
keys just prior to the <var>event</var>, which is the bitwise inclusive OR of
one or more of the button or modifier key masks: <var>x:Button1-Mask</var>,
<var>x:Button2-Mask</var>, <var>x:Button3-Mask</var>, <var>x:Button4-Mask</var>,
<var>x:Button5-Mask</var>, <var>x:Shift-Mask</var>, <var>x:Lock-Mask</var>,
<var>x:Control-Mask</var>, <var>x:Mod1-Mask</var>, <var>x:Mod2-Mask</var>,
<var>x:Mod3-Mask</var>, <var>x:Mod4-Mask</var>, and <var>x:Mod5-Mask</var>.
</p>
<p>For visibility events, the state of the window's visibility:
<var>x:Visibility-Unobscured</var>, <var>x:Visibility-Partially-Obscured</var>, or
<var>x:Visibility-Fully-Obscured</var>.
</p>
<p>For colormap events, indicates whether the colormap is installed or
uninstalled: x:Colormap-Installed or x:Colormap-Uninstalled.
</p>
<p>For property events, indicates whether the property was changed to a new
value or deleted: x:Property-New-Value or x:Property-Delete.
</p></td></tr>
<tr><td><p> X-event:keycode
</p></td><td>
<p>An integer that represents a physical key on the keyboard.
</p></td></tr>
<tr><td><p> X-event:same-screen
</p></td><td>
<p>Indicates whether the event window is on the same screen as the root
window. If #t, the event and root windows are on the same screen. If
#f, the event and root windows are not on the same screen.
</p></td></tr>
<tr><td><p> X-event:button
</p></td><td>
<p>The pointer button that changed state; can be the <var>x:Button1</var>,
<var>x:Button2</var>, <var>x:Button3</var>, <var>x:Button4</var>, or <var>x:Button5</var>
value.
</p></td></tr>
<tr><td><p> X-event:is-hint
</p></td><td>
<p>Detail of motion-notify events: <var>x:Notify-Normal</var> or
<var>x:Notify-Hint</var>.
</p></td></tr>
<tr><td><p> X-event:mode
</p></td><td>
<p>Indicates whether the <var>event</var> is a normal event, pseudo-motion event
when a grab activates, or a pseudo-motion event when a grab deactivates:
<var>x:Notify-Normal</var>, <var>x:Notify-Grab</var>, or <var>x:Notify-Ungrab</var>.
</p></td></tr>
<tr><td><p> X-event:detail
</p></td><td>
<p>Indicates the notification detail: <var>x:Notify-Ancestor</var>,
<var>x:Notify-Virtual</var>, <var>x:Notify-Inferior</var>,
<var>x:Notify-Nonlinear</var>, or <var>x:Notify-Nonlinear-Virtual</var>.
</p></td></tr>
<tr><td><p> X-event:focus
</p></td><td>
<p>If the event window is the focus window or an inferior of the focus
window, #t; otherwise #f.
</p></td></tr>
<tr><td><p> X-event:width
</p></td></tr>
<tr><td><p> X-event:height
</p></td><td>
<p>The size (extent) of the rectangle.
</p></td></tr>
<tr><td><p> X-event:count
</p></td><td>
<p>For mapping events is the number of keycodes altered.
</p>
<p>For expose events Is the number of Expose or GraphicsExpose events that
are to follow. If count is zero, no more Expose events follow for this
window. However, if count is nonzero, at least that number of Expose
events (and possibly more) follow for this window. Simple applications
that do not want to optimize redisplay by distinguishing between
subareas of its window can just ignore all Expose events with nonzero
counts and perform full redisplays on events with zero counts.
</p></td></tr>
<tr><td><p> X-event:major-code
</p></td><td>
<p>The major_code member is set to the graphics request initiated by the
client and can be either X_CopyArea or X_CopyPlane. If it is
X_CopyArea, a call to XCopyArea initiated the request. If it is
X_CopyPlane, a call to XCopyPlane initiated the request.
</p></td></tr>
<tr><td><p> X-event:minor-code
</p></td><td>
<p>Not currently used.
</p></td></tr>
<tr><td><p> X-event:border-width
</p></td><td>
<p>For configure events, the width of the window's border, in pixels.
</p></td></tr>
<tr><td><p> X-event:override-redirect
</p></td><td>
<p>The override-redirect attribute of the window. Window manager clients
normally should ignore this window if it is #t.
</p></td></tr>
<tr><td><p> X-event:from-configure
</p></td><td>
<p>True if the event was generated as a result of a resizing of the
window's parent when the window itself had a win-gravity of
x:Unmap-Gravity.
</p></td></tr>
<tr><td><p> X-event:value-mask
</p></td><td>
<p>Indicates which components were specified in the ConfigureWindow
protocol request. The corresponding values are reported as given in the
request. The remaining values are filled in from the current geometry
of the window, except in the case of above (sibling) and detail
(stack-mode), which are reported as None and Above, respectively, if
they are not given in the request.
</p></td></tr>
<tr><td><p> X-event:place
</p></td><td>
<p>The window's position after the restack occurs and is either
x:Place-On-Top or x:Place-On-Bottom. If it is x:Place-On-Top, the
window is now on top of all siblings. If it is x:Place-On-Bottom, the
window is now below all siblings.
</p></td></tr>
<tr><td><p> X-event:new
</p></td><td>
<p>indicate whether the colormap for the specified window was changed or
installed or uninstalled and can be True or False. If it is True, the
colormap was changed. If it is False, the colormap was installed or
uninstalled.
</p></td></tr>
<tr><td><p> X-event:format
</p></td><td>
<p>Is 8, 16, or 32 and specifies whether the data should be viewed as a
list of bytes, shorts, or longs
</p></td></tr>
<tr><td><p> X-event:request
</p></td><td>
<p>Indicates the kind of mapping change that occurred and can be
<var>x:Mapping-Modifier</var>, <var>x:Mapping-Keyboard</var>, or
<var>x:Mapping-Pointer</var>. If it is <var>x:Mapping-Modifier</var>, the
modifier mapping was changed. If it is <var>x:Mapping-Keyboard</var>, the
keyboard mapping was changed. If it is <var>x:Mapping-Pointer</var>, the
pointer button mapping was changed.
</p></td></tr>
<tr><td><p> X-event:first-keycode
</p></td><td>
<p>The X-event:first-keycode is set only if the X-event:request was set to
<var>x:Mapping-Keyboard</var>. The number in X-event:first-keycode
represents the first number in the range of the altered mapping, and
X-event:count represents the number of keycodes altered.
</p></td></tr>
</table>
</dd></dl>
<hr size="6">
<a name="Index"></a>
<a name="SEC16"></a>
<table cellpadding="1" cellspacing="1" border="0">
<tr><td valign="middle" align="left">[<a href="#SEC15" title="Previous section in reading order"> < </a>]</td>
<td valign="middle" align="left">[<a href="#SEC17" title="Next section in reading order"> > </a>]</td>
<td valign="middle" align="left"> </td>
<td valign="middle" align="left">[<a href="#SEC15" title="Beginning of this chapter or previous chapter"> << </a>]</td>
<td valign="middle" align="left">[<a href="#Top" title="Up section"> Up </a>]</td>
<td valign="middle" align="left">[<a href="#SEC17" title="Next chapter"> >> </a>]</td>
<td valign="middle" align="left"> </td>
<td valign="middle" align="left"> </td>
<td valign="middle" align="left"> </td>
<td valign="middle" align="left"> </td>
<td valign="middle" align="left">[<a href="#Top" title="Cover (top) of document">Top</a>]</td>
<td valign="middle" align="left">[<a href="#SEC_Contents" title="Table of contents">Contents</a>]</td>
<td valign="middle" align="left">[<a href="#SEC16" title="Index">Index</a>]</td>
<td valign="middle" align="left">[<a href="#SEC_About" title="About (help)"> ? </a>]</td>
</tr></table>
<h1 class="unnumbered"> Procedure and Macro Index </h1>
<p>This is an alphabetical list of all the procedures and macros in Xlibscm.
</p>
<table><tr><th valign="top">Jump to: </th><td><a href="#SEC16_0" class="summary-letter"><b>H</b></a>
<a href="#SEC16_1" class="summary-letter"><b>X</b></a>
</td></tr></table>
<table border="0" class="index-fn">
<tr><td></td><th align="left">Index Entry</th><th align="left"> Section</th></tr>
<tr><td colspan="3"> <hr></td></tr>
<tr><th><a name="SEC16_0">H</a></th><td></td><td></td></tr>
<tr><td></td><td valign="top"><a href="#IDX4"><code>hostname:number.screen-number</code></a></td><td valign="top"><a href="#SEC2">2. Display and Screens</a></td></tr>
<tr><td colspan="3"> <hr></td></tr>
<tr><th><a name="SEC16_1">X</a></th><td></td><td></td></tr>
<tr><td></td><td valign="top"><a href="#IDX139"><code>x:alloc-colormap-cells</code></a></td><td valign="top"><a href="#SEC10">6. Colormap</a></td></tr>
<tr><td></td><td valign="top"><a href="#IDX140"><code>x:alloc-colormap-cells</code></a></td><td valign="top"><a href="#SEC10">6. Colormap</a></td></tr>
<tr><td></td><td valign="top"><a href="#IDX141"><code>x:alloc-colormap-cells</code></a></td><td valign="top"><a href="#SEC10">6. Colormap</a></td></tr>
<tr><td></td><td valign="top"><a href="#IDX142"><code>x:alloc-colormap-cells</code></a></td><td valign="top"><a href="#SEC10">6. Colormap</a></td></tr>
<tr><td></td><td valign="top"><a href="#IDX151"><code>x:ccc</code></a></td><td valign="top"><a href="#SEC10">6. Colormap</a></td></tr>
<tr><td></td><td valign="top"><a href="#IDX155"><code>x:clear-area</code></a></td><td valign="top"><a href="#SEC11">7. Rendering</a></td></tr>
<tr><td></td><td valign="top"><a href="#IDX5"><code>x:close</code></a></td><td valign="top"><a href="#SEC2">2. Display and Screens</a></td></tr>
<tr><td></td><td valign="top"><a href="#IDX63"><code>x:close</code></a></td><td valign="top"><a href="#SEC4">3.1 Windows and Pixmaps</a></td></tr>
<tr><td></td><td valign="top"><a href="#IDX64"><code>x:close</code></a></td><td valign="top"><a href="#SEC4">3.1 Windows and Pixmaps</a></td></tr>
<tr><td></td><td valign="top"><a href="#IDX147"><code>x:color-ref</code></a></td><td valign="top"><a href="#SEC10">6. Colormap</a></td></tr>
<tr><td></td><td valign="top"><a href="#IDX148"><code>X:Color-Set!</code></a></td><td valign="top"><a href="#SEC10">6. Colormap</a></td></tr>
<tr><td></td><td valign="top"><a href="#IDX149"><code>X:Color-Set!</code></a></td><td valign="top"><a href="#SEC10">6. Colormap</a></td></tr>
<tr><td></td><td valign="top"><a href="#IDX145"><code>x:colormap-find-color</code></a></td><td valign="top"><a href="#SEC10">6. Colormap</a></td></tr>
<tr><td></td><td valign="top"><a href="#IDX146"><code>x:colormap-find-color</code></a></td><td valign="top"><a href="#SEC10">6. Colormap</a></td></tr>
<tr><td></td><td valign="top"><a href="#IDX138"><code>x:copy-colormap-and-free</code></a></td><td valign="top"><a href="#SEC10">6. Colormap</a></td></tr>
<tr><td></td><td valign="top"><a href="#IDX104"><code>x:copy-gc-fields!</code></a></td><td valign="top"><a href="#SEC7">4. Graphics Context</a></td></tr>
<tr><td></td><td valign="top"><a href="#IDX137"><code>x:create-colormap</code></a></td><td valign="top"><a href="#SEC10">6. Colormap</a></td></tr>
<tr><td></td><td valign="top"><a href="#IDX131"><code>x:create-cursor</code></a></td><td valign="top"><a href="#SEC9">5. Cursor</a></td></tr>
<tr><td></td><td valign="top"><a href="#IDX133"><code>x:create-cursor</code></a></td><td valign="top"><a href="#SEC9">5. Cursor</a></td></tr>
<tr><td></td><td valign="top"><a href="#IDX134"><code>x:create-cursor</code></a></td><td valign="top"><a href="#SEC9">5. Cursor</a></td></tr>
<tr><td></td><td valign="top"><a href="#IDX135"><code>x:create-cursor</code></a></td><td valign="top"><a href="#SEC9">5. Cursor</a></td></tr>
<tr><td></td><td valign="top"><a href="#IDX136"><code>x:create-cursor</code></a></td><td valign="top"><a href="#SEC9">5. Cursor</a></td></tr>
<tr><td></td><td valign="top"><a href="#IDX102"><code>x:create-gc</code></a></td><td valign="top"><a href="#SEC7">4. Graphics Context</a></td></tr>
<tr><td></td><td valign="top"><a href="#IDX61"><code>x:create-pixmap</code></a></td><td valign="top"><a href="#SEC4">3.1 Windows and Pixmaps</a></td></tr>
<tr><td></td><td valign="top"><a href="#IDX62"><code>x:create-pixmap</code></a></td><td valign="top"><a href="#SEC4">3.1 Windows and Pixmaps</a></td></tr>
<tr><td></td><td valign="top"><a href="#IDX59"><code>x:create-window</code></a></td><td valign="top"><a href="#SEC4">3.1 Windows and Pixmaps</a></td></tr>
<tr><td></td><td valign="top"><a href="#IDX60"><code>x:create-window</code></a></td><td valign="top"><a href="#SEC4">3.1 Windows and Pixmaps</a></td></tr>
<tr><td></td><td valign="top"><a href="#IDX17"><code>x:default-ccc</code></a></td><td valign="top"><a href="#SEC2">2. Display and Screens</a></td></tr>
<tr><td></td><td valign="top"><a href="#IDX18"><code>x:default-ccc</code></a></td><td valign="top"><a href="#SEC2">2. Display and Screens</a></td></tr>
<tr><td></td><td valign="top"><a href="#IDX19"><code>x:default-ccc</code></a></td><td valign="top"><a href="#SEC2">2. Display and Screens</a></td></tr>
<tr><td></td><td valign="top"><a href="#IDX14"><code>x:default-colormap</code></a></td><td valign="top"><a href="#SEC2">2. Display and Screens</a></td></tr>
<tr><td></td><td valign="top"><a href="#IDX15"><code>x:default-colormap</code></a></td><td valign="top"><a href="#SEC2">2. Display and Screens</a></td></tr>
<tr><td></td><td valign="top"><a href="#IDX16"><code>x:default-colormap</code></a></td><td valign="top"><a href="#SEC2">2. Display and Screens</a></td></tr>
<tr><td></td><td valign="top"><a href="#IDX20"><code>x:default-gc</code></a></td><td valign="top"><a href="#SEC2">2. Display and Screens</a></td></tr>
<tr><td></td><td valign="top"><a href="#IDX21"><code>x:default-gc</code></a></td><td valign="top"><a href="#SEC2">2. Display and Screens</a></td></tr>
<tr><td></td><td valign="top"><a href="#IDX22"><code>x:default-gc</code></a></td><td valign="top"><a href="#SEC2">2. Display and Screens</a></td></tr>
<tr><td></td><td valign="top"><a href="#IDX10"><code>x:default-screen</code></a></td><td valign="top"><a href="#SEC2">2. Display and Screens</a></td></tr>
<tr><td></td><td valign="top"><a href="#IDX26"><code>x:default-visual</code></a></td><td valign="top"><a href="#SEC2">2. Display and Screens</a></td></tr>
<tr><td></td><td valign="top"><a href="#IDX27"><code>x:default-visual</code></a></td><td valign="top"><a href="#SEC2">2. Display and Screens</a></td></tr>
<tr><td></td><td valign="top"><a href="#IDX28"><code>x:default-visual</code></a></td><td valign="top"><a href="#SEC2">2. Display and Screens</a></td></tr>
<tr><td></td><td valign="top"><a href="#IDX165"><code>x:draw-lines</code></a></td><td valign="top"><a href="#SEC13">Draw Shapes</a></td></tr>
<tr><td></td><td valign="top"><a href="#IDX166"><code>x:draw-lines</code></a></td><td valign="top"><a href="#SEC13">Draw Shapes</a></td></tr>
<tr><td></td><td valign="top"><a href="#IDX167"><code>x:draw-lines</code></a></td><td valign="top"><a href="#SEC13">Draw Shapes</a></td></tr>
<tr><td></td><td valign="top"><a href="#IDX159"><code>x:draw-points</code></a></td><td valign="top"><a href="#SEC13">Draw Shapes</a></td></tr>
<tr><td></td><td valign="top"><a href="#IDX160"><code>x:draw-points</code></a></td><td valign="top"><a href="#SEC13">Draw Shapes</a></td></tr>
<tr><td></td><td valign="top"><a href="#IDX161"><code>x:draw-points</code></a></td><td valign="top"><a href="#SEC13">Draw Shapes</a></td></tr>
<tr><td></td><td valign="top"><a href="#IDX162"><code>x:draw-segments</code></a></td><td valign="top"><a href="#SEC13">Draw Shapes</a></td></tr>
<tr><td></td><td valign="top"><a href="#IDX163"><code>x:draw-segments</code></a></td><td valign="top"><a href="#SEC13">Draw Shapes</a></td></tr>
<tr><td></td><td valign="top"><a href="#IDX164"><code>x:draw-segments</code></a></td><td valign="top"><a href="#SEC13">Draw Shapes</a></td></tr>
<tr><td></td><td valign="top"><a href="#IDX157"><code>x:draw-string</code></a></td><td valign="top"><a href="#SEC12">Draw Strings</a></td></tr>
<tr><td></td><td valign="top"><a href="#IDX177"><code>x:event-ref</code></a></td><td valign="top"><a href="#SEC15">9. Event</a></td></tr>
<tr><td></td><td valign="top"><a href="#IDX174"><code>x:events-queued</code></a></td><td valign="top"><a href="#SEC15">9. Event</a></td></tr>
<tr><td></td><td valign="top"><a href="#IDX168"><code>x:fill-polygon</code></a></td><td valign="top"><a href="#SEC13">Draw Shapes</a></td></tr>
<tr><td></td><td valign="top"><a href="#IDX169"><code>x:fill-polygon</code></a></td><td valign="top"><a href="#SEC13">Draw Shapes</a></td></tr>
<tr><td></td><td valign="top"><a href="#IDX170"><code>x:fill-polygon</code></a></td><td valign="top"><a href="#SEC13">Draw Shapes</a></td></tr>
<tr><td></td><td valign="top"><a href="#IDX156"><code>x:fill-rectangle</code></a></td><td valign="top"><a href="#SEC11">7. Rendering</a></td></tr>
<tr><td></td><td valign="top"><a href="#IDX152"><code>x:flush</code></a></td><td valign="top"><a href="#SEC11">7. Rendering</a></td></tr>
<tr><td></td><td valign="top"><a href="#IDX153"><code>x:flush</code></a></td><td valign="top"><a href="#SEC11">7. Rendering</a></td></tr>
<tr><td></td><td valign="top"><a href="#IDX154"><code>x:flush</code></a></td><td valign="top"><a href="#SEC11">7. Rendering</a></td></tr>
<tr><td></td><td valign="top"><a href="#IDX143"><code>x:free-colormap-cells</code></a></td><td valign="top"><a href="#SEC10">6. Colormap</a></td></tr>
<tr><td></td><td valign="top"><a href="#IDX144"><code>x:free-colormap-cells</code></a></td><td valign="top"><a href="#SEC10">6. Colormap</a></td></tr>
<tr><td></td><td valign="top"><a href="#IDX105"><code>x:gc-ref</code></a></td><td valign="top"><a href="#SEC7">4. Graphics Context</a></td></tr>
<tr><td></td><td valign="top"><a href="#IDX103"><code>x:gc-set!</code></a></td><td valign="top"><a href="#SEC7">4. Graphics Context</a></td></tr>
<tr><td></td><td valign="top"><a href="#IDX91"><code>x:get-window-property</code></a></td><td valign="top"><a href="#SEC6">3.3 Window Properties and Visibility</a></td></tr>
<tr><td></td><td valign="top"><a href="#IDX92"><code>x:get-window-property</code></a></td><td valign="top"><a href="#SEC6">3.3 Window Properties and Visibility</a></td></tr>
<tr><td></td><td valign="top"><a href="#IDX158"><code>x:image-string</code></a></td><td valign="top"><a href="#SEC12">Draw Strings</a></td></tr>
<tr><td></td><td valign="top"><a href="#IDX150"><code>x:install-colormap</code></a></td><td valign="top"><a href="#SEC10">6. Colormap</a></td></tr>
<tr><td></td><td valign="top"><a href="#IDX93"><code>x:list-properties</code></a></td><td valign="top"><a href="#SEC6">3.3 Window Properties and Visibility</a></td></tr>
<tr><td></td><td valign="top"><a href="#IDX31"><code>x:make-visual</code></a></td><td valign="top"><a href="#SEC2">2. Display and Screens</a></td></tr>
<tr><td></td><td valign="top"><a href="#IDX32"><code>x:make-visual</code></a></td><td valign="top"><a href="#SEC2">2. Display and Screens</a></td></tr>
<tr><td></td><td valign="top"><a href="#IDX99"><code>x:map-subwindows</code></a></td><td valign="top"><a href="#SEC6">3.3 Window Properties and Visibility</a></td></tr>
<tr><td></td><td valign="top"><a href="#IDX98"><code>x:map-window</code></a></td><td valign="top"><a href="#SEC6">3.3 Window Properties and Visibility</a></td></tr>
<tr><td></td><td valign="top"><a href="#IDX175"><code>x:next-event</code></a></td><td valign="top"><a href="#SEC15">9. Event</a></td></tr>
<tr><td></td><td valign="top"><a href="#IDX3"><code>x:open-display</code></a></td><td valign="top"><a href="#SEC2">2. Display and Screens</a></td></tr>
<tr><td></td><td valign="top"><a href="#IDX176"><code>x:peek-event</code></a></td><td valign="top"><a href="#SEC15">9. Event</a></td></tr>
<tr><td></td><td valign="top"><a href="#IDX173"><code>x:pending</code></a></td><td valign="top"><a href="#SEC15">9. Event</a></td></tr>
<tr><td></td><td valign="top"><a href="#IDX6"><code>x:protocol-version</code></a></td><td valign="top"><a href="#SEC2">2. Display and Screens</a></td></tr>
<tr><td></td><td valign="top"><a href="#IDX172"><code>x:q-length</code></a></td><td valign="top"><a href="#SEC15">9. Event</a></td></tr>
<tr><td></td><td valign="top"><a href="#IDX171"><code>x:read-bitmap-file</code></a></td><td valign="top"><a href="#SEC14">8. Images</a></td></tr>
<tr><td></td><td valign="top"><a href="#IDX11"><code>x:root-window</code></a></td><td valign="top"><a href="#SEC2">2. Display and Screens</a></td></tr>
<tr><td></td><td valign="top"><a href="#IDX12"><code>x:root-window</code></a></td><td valign="top"><a href="#SEC2">2. Display and Screens</a></td></tr>
<tr><td></td><td valign="top"><a href="#IDX13"><code>x:root-window</code></a></td><td valign="top"><a href="#SEC2">2. Display and Screens</a></td></tr>
<tr><td></td><td valign="top"><a href="#IDX56"><code>x:screen-black</code></a></td><td valign="top"><a href="#SEC2">2. Display and Screens</a></td></tr>
<tr><td></td><td valign="top"><a href="#IDX57"><code>x:screen-black</code></a></td><td valign="top"><a href="#SEC2">2. Display and Screens</a></td></tr>
<tr><td></td><td valign="top"><a href="#IDX58"><code>x:screen-black</code></a></td><td valign="top"><a href="#SEC2">2. Display and Screens</a></td></tr>
<tr><td></td><td valign="top"><a href="#IDX39"><code>x:screen-cells</code></a></td><td valign="top"><a href="#SEC2">2. Display and Screens</a></td></tr>
<tr><td></td><td valign="top"><a href="#IDX40"><code>x:screen-cells</code></a></td><td valign="top"><a href="#SEC2">2. Display and Screens</a></td></tr>
<tr><td></td><td valign="top"><a href="#IDX41"><code>x:screen-cells</code></a></td><td valign="top"><a href="#SEC2">2. Display and Screens</a></td></tr>
<tr><td></td><td valign="top"><a href="#IDX9"><code>x:screen-count</code></a></td><td valign="top"><a href="#SEC2">2. Display and Screens</a></td></tr>
<tr><td></td><td valign="top"><a href="#IDX42"><code>x:screen-depth</code></a></td><td valign="top"><a href="#SEC2">2. Display and Screens</a></td></tr>
<tr><td></td><td valign="top"><a href="#IDX43"><code>x:screen-depth</code></a></td><td valign="top"><a href="#SEC2">2. Display and Screens</a></td></tr>
<tr><td></td><td valign="top"><a href="#IDX44"><code>x:screen-depth</code></a></td><td valign="top"><a href="#SEC2">2. Display and Screens</a></td></tr>
<tr><td></td><td valign="top"><a href="#IDX45"><code>x:screen-depth</code></a></td><td valign="top"><a href="#SEC2">2. Display and Screens</a></td></tr>
<tr><td></td><td valign="top"><a href="#IDX23"><code>x:screen-depths</code></a></td><td valign="top"><a href="#SEC2">2. Display and Screens</a></td></tr>
<tr><td></td><td valign="top"><a href="#IDX24"><code>x:screen-depths</code></a></td><td valign="top"><a href="#SEC2">2. Display and Screens</a></td></tr>
<tr><td></td><td valign="top"><a href="#IDX25"><code>x:screen-depths</code></a></td><td valign="top"><a href="#SEC2">2. Display and Screens</a></td></tr>
<tr><td></td><td valign="top"><a href="#IDX50"><code>x:screen-dimensions</code></a></td><td valign="top"><a href="#SEC2">2. Display and Screens</a></td></tr>
<tr><td></td><td valign="top"><a href="#IDX51"><code>x:screen-dimensions</code></a></td><td valign="top"><a href="#SEC2">2. Display and Screens</a></td></tr>
<tr><td></td><td valign="top"><a href="#IDX52"><code>x:screen-dimensions</code></a></td><td valign="top"><a href="#SEC2">2. Display and Screens</a></td></tr>
<tr><td></td><td valign="top"><a href="#IDX47"><code>x:screen-size</code></a></td><td valign="top"><a href="#SEC2">2. Display and Screens</a></td></tr>
<tr><td></td><td valign="top"><a href="#IDX48"><code>x:screen-size</code></a></td><td valign="top"><a href="#SEC2">2. Display and Screens</a></td></tr>
<tr><td></td><td valign="top"><a href="#IDX49"><code>x:screen-size</code></a></td><td valign="top"><a href="#SEC2">2. Display and Screens</a></td></tr>
<tr><td></td><td valign="top"><a href="#IDX53"><code>x:screen-white</code></a></td><td valign="top"><a href="#SEC2">2. Display and Screens</a></td></tr>
<tr><td></td><td valign="top"><a href="#IDX54"><code>x:screen-white</code></a></td><td valign="top"><a href="#SEC2">2. Display and Screens</a></td></tr>
<tr><td></td><td valign="top"><a href="#IDX55"><code>x:screen-white</code></a></td><td valign="top"><a href="#SEC2">2. Display and Screens</a></td></tr>
<tr><td></td><td valign="top"><a href="#IDX7"><code>x:server-vendor</code></a></td><td valign="top"><a href="#SEC2">2. Display and Screens</a></td></tr>
<tr><td></td><td valign="top"><a href="#IDX101"><code>x:unmap-subwindows</code></a></td><td valign="top"><a href="#SEC6">3.3 Window Properties and Visibility</a></td></tr>
<tr><td></td><td valign="top"><a href="#IDX100"><code>x:unmap-window</code></a></td><td valign="top"><a href="#SEC6">3.3 Window Properties and Visibility</a></td></tr>
<tr><td></td><td valign="top"><a href="#IDX8"><code>x:vendor-release</code></a></td><td valign="top"><a href="#SEC2">2. Display and Screens</a></td></tr>
<tr><td></td><td valign="top"><a href="#IDX33"><code>x:visual-class</code></a></td><td valign="top"><a href="#SEC2">2. Display and Screens</a></td></tr>
<tr><td></td><td valign="top"><a href="#IDX34"><code>x:visual-class</code></a></td><td valign="top"><a href="#SEC2">2. Display and Screens</a></td></tr>
<tr><td></td><td valign="top"><a href="#IDX35"><code>x:visual-class</code></a></td><td valign="top"><a href="#SEC2">2. Display and Screens</a></td></tr>
<tr><td></td><td valign="top"><a href="#IDX36"><code>x:visual-geometry</code></a></td><td valign="top"><a href="#SEC2">2. Display and Screens</a></td></tr>
<tr><td></td><td valign="top"><a href="#IDX37"><code>x:visual-geometry</code></a></td><td valign="top"><a href="#SEC2">2. Display and Screens</a></td></tr>
<tr><td></td><td valign="top"><a href="#IDX38"><code>x:visual-geometry</code></a></td><td valign="top"><a href="#SEC2">2. Display and Screens</a></td></tr>
<tr><td></td><td valign="top"><a href="#IDX65"><code>x:window-geometry</code></a></td><td valign="top"><a href="#SEC4">3.1 Windows and Pixmaps</a></td></tr>
<tr><td></td><td valign="top"><a href="#IDX66"><code>x:window-geometry-set!</code></a></td><td valign="top"><a href="#SEC4">3.1 Windows and Pixmaps</a></td></tr>
<tr><td></td><td valign="top"><a href="#IDX90"><code>x:window-ref</code></a></td><td valign="top"><a href="#SEC5">3.2 Window Attributes</a></td></tr>
<tr><td></td><td valign="top"><a href="#IDX74"><code>x:window-set!</code></a></td><td valign="top"><a href="#SEC5">3.2 Window Attributes</a></td></tr>
<tr><td colspan="3"> <hr></td></tr>
</table>
<table><tr><th valign="top">Jump to: </th><td><a href="#SEC16_0" class="summary-letter"><b>H</b></a>
<a href="#SEC16_1" class="summary-letter"><b>X</b></a>
</td></tr></table>
<hr size="6">
<a name="SEC17"></a>
<table cellpadding="1" cellspacing="1" border="0">
<tr><td valign="middle" align="left">[<a href="#SEC16" title="Previous section in reading order"> < </a>]</td>
<td valign="middle" align="left">[<a href="#SEC18" title="Next section in reading order"> > </a>]</td>
<td valign="middle" align="left"> </td>
<td valign="middle" align="left">[<a href="#SEC16" title="Beginning of this chapter or previous chapter"> << </a>]</td>
<td valign="middle" align="left">[<a href="#Top" title="Up section"> Up </a>]</td>
<td valign="middle" align="left">[<a href="#SEC18" title="Next chapter"> >> </a>]</td>
<td valign="middle" align="left"> </td>
<td valign="middle" align="left"> </td>
<td valign="middle" align="left"> </td>
<td valign="middle" align="left"> </td>
<td valign="middle" align="left">[<a href="#Top" title="Cover (top) of document">Top</a>]</td>
<td valign="middle" align="left">[<a href="#SEC_Contents" title="Table of contents">Contents</a>]</td>
<td valign="middle" align="left">[<a href="#SEC16" title="Index">Index</a>]</td>
<td valign="middle" align="left">[<a href="#SEC_About" title="About (help)"> ? </a>]</td>
</tr></table>
<h1 class="unnumbered"> Variable Index </h1>
<p>This is an alphabetical list of all the global variables in Xlibscm.
</p>
<table><tr><th valign="top">Jump to: </th><td><a href="#SEC17_0" class="summary-letter"><b>X</b></a>
</td></tr></table>
<table border="0" class="index-vr">
<tr><td></td><th align="left">Index Entry</th><th align="left"> Section</th></tr>
<tr><td colspan="3"> <hr></td></tr>
<tr><th><a name="SEC17_0">X</a></th><td></td><td></td></tr>
<tr><td></td><td valign="top"><a href="#IDX76"><code>x:CW-Back-Pixel</code></a></td><td valign="top"><a href="#SEC5">3.2 Window Attributes</a></td></tr>
<tr><td></td><td valign="top"><a href="#IDX75"><code>x:CW-Back-Pixmap</code></a></td><td valign="top"><a href="#SEC5">3.2 Window Attributes</a></td></tr>
<tr><td></td><td valign="top"><a href="#IDX83"><code>x:CW-Backing-Pixel</code></a></td><td valign="top"><a href="#SEC5">3.2 Window Attributes</a></td></tr>
<tr><td></td><td valign="top"><a href="#IDX82"><code>x:CW-Backing-Planes</code></a></td><td valign="top"><a href="#SEC5">3.2 Window Attributes</a></td></tr>
<tr><td></td><td valign="top"><a href="#IDX81"><code>x:CW-Backing-Store</code></a></td><td valign="top"><a href="#SEC5">3.2 Window Attributes</a></td></tr>
<tr><td></td><td valign="top"><a href="#IDX79"><code>x:CW-Bit-Gravity</code></a></td><td valign="top"><a href="#SEC5">3.2 Window Attributes</a></td></tr>
<tr><td></td><td valign="top"><a href="#IDX78"><code>x:CW-Border-Pixel</code></a></td><td valign="top"><a href="#SEC5">3.2 Window Attributes</a></td></tr>
<tr><td></td><td valign="top"><a href="#IDX77"><code>x:CW-Border-Pixmap</code></a></td><td valign="top"><a href="#SEC5">3.2 Window Attributes</a></td></tr>
<tr><td></td><td valign="top"><a href="#IDX71"><code>x:CW-Border-Width</code></a></td><td valign="top"><a href="#SEC4">3.1 Windows and Pixmaps</a></td></tr>
<tr><td></td><td valign="top"><a href="#IDX88"><code>x:CW-Colormap</code></a></td><td valign="top"><a href="#SEC5">3.2 Window Attributes</a></td></tr>
<tr><td></td><td valign="top"><a href="#IDX89"><code>x:CW-Cursor</code></a></td><td valign="top"><a href="#SEC5">3.2 Window Attributes</a></td></tr>
<tr><td></td><td valign="top"><a href="#IDX87"><code>x:CW-Dont-Propagate</code></a></td><td valign="top"><a href="#SEC5">3.2 Window Attributes</a></td></tr>
<tr><td></td><td valign="top"><a href="#IDX86"><code>x:CW-Event-Mask</code></a></td><td valign="top"><a href="#SEC5">3.2 Window Attributes</a></td></tr>
<tr><td></td><td valign="top"><a href="#IDX70"><code>x:CW-Height</code></a></td><td valign="top"><a href="#SEC4">3.1 Windows and Pixmaps</a></td></tr>
<tr><td></td><td valign="top"><a href="#IDX84"><code>x:CW-Override-Redirect</code></a></td><td valign="top"><a href="#SEC5">3.2 Window Attributes</a></td></tr>
<tr><td></td><td valign="top"><a href="#IDX85"><code>x:CW-Save-Under</code></a></td><td valign="top"><a href="#SEC5">3.2 Window Attributes</a></td></tr>
<tr><td></td><td valign="top"><a href="#IDX72"><code>x:CW-Sibling</code></a></td><td valign="top"><a href="#SEC4">3.1 Windows and Pixmaps</a></td></tr>
<tr><td></td><td valign="top"><a href="#IDX73"><code>x:CW-Stack-Mode</code></a></td><td valign="top"><a href="#SEC4">3.1 Windows and Pixmaps</a></td></tr>
<tr><td></td><td valign="top"><a href="#IDX69"><code>x:CW-Width</code></a></td><td valign="top"><a href="#SEC4">3.1 Windows and Pixmaps</a></td></tr>
<tr><td></td><td valign="top"><a href="#IDX80"><code>x:CW-Win-Gravity</code></a></td><td valign="top"><a href="#SEC5">3.2 Window Attributes</a></td></tr>
<tr><td></td><td valign="top"><a href="#IDX67"><code>x:CWX</code></a></td><td valign="top"><a href="#SEC4">3.1 Windows and Pixmaps</a></td></tr>
<tr><td></td><td valign="top"><a href="#IDX68"><code>x:CWY</code></a></td><td valign="top"><a href="#SEC4">3.1 Windows and Pixmaps</a></td></tr>
<tr><td></td><td valign="top"><a href="#IDX130"><code>x:GC-Arc-Mode</code></a></td><td valign="top"><a href="#SEC8">GC Attributes</a></td></tr>
<tr><td></td><td valign="top"><a href="#IDX109"><code>x:GC-Background</code></a></td><td valign="top"><a href="#SEC8">GC Attributes</a></td></tr>
<tr><td></td><td valign="top"><a href="#IDX112"><code>x:GC-Cap-Style</code></a></td><td valign="top"><a href="#SEC8">GC Attributes</a></td></tr>
<tr><td></td><td valign="top"><a href="#IDX125"><code>x:GC-Clip-Mask</code></a></td><td valign="top"><a href="#SEC8">GC Attributes</a></td></tr>
<tr><td></td><td valign="top"><a href="#IDX123"><code>x:GC-Clip-X-Origin</code></a></td><td valign="top"><a href="#SEC8">GC Attributes</a></td></tr>
<tr><td></td><td valign="top"><a href="#IDX124"><code>x:GC-Clip-Y-Origin</code></a></td><td valign="top"><a href="#SEC8">GC Attributes</a></td></tr>
<tr><td></td><td valign="top"><a href="#IDX129"><code>x:GC-Dash-List</code></a></td><td valign="top"><a href="#SEC8">GC Attributes</a></td></tr>
<tr><td></td><td valign="top"><a href="#IDX128"><code>x:GC-Dash-Offset</code></a></td><td valign="top"><a href="#SEC8">GC Attributes</a></td></tr>
<tr><td></td><td valign="top"><a href="#IDX115"><code>x:GC-Fill-Rule</code></a></td><td valign="top"><a href="#SEC8">GC Attributes</a></td></tr>
<tr><td></td><td valign="top"><a href="#IDX114"><code>x:GC-Fill-Style</code></a></td><td valign="top"><a href="#SEC8">GC Attributes</a></td></tr>
<tr><td></td><td valign="top"><a href="#IDX120"><code>x:GC-Font</code></a></td><td valign="top"><a href="#SEC8">GC Attributes</a></td></tr>
<tr><td></td><td valign="top"><a href="#IDX108"><code>x:GC-Foreground</code></a></td><td valign="top"><a href="#SEC8">GC Attributes</a></td></tr>
<tr><td></td><td valign="top"><a href="#IDX106"><code>x:GC-Function</code></a></td><td valign="top"><a href="#SEC8">GC Attributes</a></td></tr>
<tr><td></td><td valign="top"><a href="#IDX122"><code>x:GC-Graphics-Exposures</code></a></td><td valign="top"><a href="#SEC8">GC Attributes</a></td></tr>
<tr><td></td><td valign="top"><a href="#IDX113"><code>x:GC-Join-Style</code></a></td><td valign="top"><a href="#SEC8">GC Attributes</a></td></tr>
<tr><td></td><td valign="top"><a href="#IDX111"><code>x:GC-Line-Style</code></a></td><td valign="top"><a href="#SEC8">GC Attributes</a></td></tr>
<tr><td></td><td valign="top"><a href="#IDX110"><code>x:GC-Line-Width</code></a></td><td valign="top"><a href="#SEC8">GC Attributes</a></td></tr>
<tr><td></td><td valign="top"><a href="#IDX107"><code>x:GC-Plane-Mask</code></a></td><td valign="top"><a href="#SEC8">GC Attributes</a></td></tr>
<tr><td></td><td valign="top"><a href="#IDX117"><code>x:GC-Stipple</code></a></td><td valign="top"><a href="#SEC8">GC Attributes</a></td></tr>
<tr><td></td><td valign="top"><a href="#IDX121"><code>x:GC-Subwindow-Mode</code></a></td><td valign="top"><a href="#SEC8">GC Attributes</a></td></tr>
<tr><td></td><td valign="top"><a href="#IDX116"><code>x:GC-Tile</code></a></td><td valign="top"><a href="#SEC8">GC Attributes</a></td></tr>
<tr><td></td><td valign="top"><a href="#IDX118"><code>x:GC-Tile-Stip-X-Origin</code></a></td><td valign="top"><a href="#SEC8">GC Attributes</a></td></tr>
<tr><td></td><td valign="top"><a href="#IDX119"><code>x:GC-Tile-Stip-Y-Origin</code></a></td><td valign="top"><a href="#SEC8">GC Attributes</a></td></tr>
<tr><td colspan="3"> <hr></td></tr>
</table>
<table><tr><th valign="top">Jump to: </th><td><a href="#SEC17_0" class="summary-letter"><b>X</b></a>
</td></tr></table>
<p>This is an alphabetical list of concepts introduced in this manual.
</p>
<hr size="6">
<a name="SEC18"></a>
<table cellpadding="1" cellspacing="1" border="0">
<tr><td valign="middle" align="left">[<a href="#SEC17" title="Previous section in reading order"> < </a>]</td>
<td valign="middle" align="left">[ > ]</td>
<td valign="middle" align="left"> </td>
<td valign="middle" align="left">[<a href="#SEC17" title="Beginning of this chapter or previous chapter"> << </a>]</td>
<td valign="middle" align="left">[<a href="#Top" title="Up section"> Up </a>]</td>
<td valign="middle" align="left">[ >> ]</td>
<td valign="middle" align="left"> </td>
<td valign="middle" align="left"> </td>
<td valign="middle" align="left"> </td>
<td valign="middle" align="left"> </td>
<td valign="middle" align="left">[<a href="#Top" title="Cover (top) of document">Top</a>]</td>
<td valign="middle" align="left">[<a href="#SEC_Contents" title="Table of contents">Contents</a>]</td>
<td valign="middle" align="left">[<a href="#SEC16" title="Index">Index</a>]</td>
<td valign="middle" align="left">[<a href="#SEC_About" title="About (help)"> ? </a>]</td>
</tr></table>
<h1 class="unnumbered"> Concept Index </h1>
<table><tr><th valign="top">Jump to: </th><td><a href="#SEC18_0" class="summary-letter"><b>C</b></a>
<a href="#SEC18_1" class="summary-letter"><b>D</b></a>
<a href="#SEC18_2" class="summary-letter"><b>M</b></a>
<a href="#SEC18_3" class="summary-letter"><b>N</b></a>
<a href="#SEC18_4" class="summary-letter"><b>R</b></a>
<a href="#SEC18_5" class="summary-letter"><b>U</b></a>
<a href="#SEC18_6" class="summary-letter"><b>V</b></a>
<a href="#SEC18_7" class="summary-letter"><b>X</b></a>
</td></tr></table>
<table border="0" class="index-cp">
<tr><td></td><th align="left">Index Entry</th><th align="left"> Section</th></tr>
<tr><td colspan="3"> <hr></td></tr>
<tr><th><a name="SEC18_0">C</a></th><td></td><td></td></tr>
<tr><td></td><td valign="top"><a href="#SEC10">colormap</a></td><td valign="top"><a href="#SEC10">6. Colormap</a></td></tr>
<tr><td></td><td valign="top"><a href="#IDX132">cursor</a></td><td valign="top"><a href="#SEC9">5. Cursor</a></td></tr>
<tr><td colspan="3"> <hr></td></tr>
<tr><th><a name="SEC18_1">D</a></th><td></td><td></td></tr>
<tr><td></td><td valign="top"><a href="#IDX46">depth</a></td><td valign="top"><a href="#SEC2">2. Display and Screens</a></td></tr>
<tr><td></td><td valign="top"><a href="#SEC3">drawable</a></td><td valign="top"><a href="#SEC3">3. Drawables</a></td></tr>
<tr><td></td><td valign="top"><a href="#SEC3">Drawable</a></td><td valign="top"><a href="#SEC3">3. Drawables</a></td></tr>
<tr><td colspan="3"> <hr></td></tr>
<tr><th><a name="SEC18_2">M</a></th><td></td><td></td></tr>
<tr><td></td><td valign="top"><a href="#IDX94">map</a></td><td valign="top"><a href="#SEC6">3.3 Window Properties and Visibility</a></td></tr>
<tr><td></td><td valign="top"><a href="#IDX96">mapped</a></td><td valign="top"><a href="#SEC6">3.3 Window Properties and Visibility</a></td></tr>
<tr><td colspan="3"> <hr></td></tr>
<tr><th><a name="SEC18_3">N</a></th><td></td><td></td></tr>
<tr><td></td><td valign="top"><a href="#IDX127">none</a></td><td valign="top"><a href="#SEC8">GC Attributes</a></td></tr>
<tr><td colspan="3"> <hr></td></tr>
<tr><th><a name="SEC18_4">R</a></th><td></td><td></td></tr>
<tr><td></td><td valign="top"><a href="#SEC10">RGB</a></td><td valign="top"><a href="#SEC10">6. Colormap</a></td></tr>
<tr><td colspan="3"> <hr></td></tr>
<tr><th><a name="SEC18_5">U</a></th><td></td><td></td></tr>
<tr><td></td><td valign="top"><a href="#IDX95">unmap</a></td><td valign="top"><a href="#SEC6">3.3 Window Properties and Visibility</a></td></tr>
<tr><td></td><td valign="top"><a href="#IDX97">unmapped</a></td><td valign="top"><a href="#SEC6">3.3 Window Properties and Visibility</a></td></tr>
<tr><td colspan="3"> <hr></td></tr>
<tr><th><a name="SEC18_6">V</a></th><td></td><td></td></tr>
<tr><td></td><td valign="top"><a href="#IDX29">visual</a></td><td valign="top"><a href="#SEC2">2. Display and Screens</a></td></tr>
<tr><td></td><td valign="top"><a href="#IDX30">Visual</a></td><td valign="top"><a href="#SEC2">2. Display and Screens</a></td></tr>
<tr><td colspan="3"> <hr></td></tr>
<tr><th><a name="SEC18_7">X</a></th><td></td><td></td></tr>
<tr><td></td><td valign="top"><a href="#IDX1">X</a></td><td valign="top"><a href="#SEC1">1. Xlibscm</a></td></tr>
<tr><td></td><td valign="top"><a href="#IDX126">x:None</a></td><td valign="top"><a href="#SEC8">GC Attributes</a></td></tr>
<tr><td></td><td valign="top"><a href="#IDX2"><code>Xlib</code></a></td><td valign="top"><a href="#SEC1">1. Xlibscm</a></td></tr>
<tr><td colspan="3"> <hr></td></tr>
</table>
<table><tr><th valign="top">Jump to: </th><td><a href="#SEC18_0" class="summary-letter"><b>C</b></a>
<a href="#SEC18_1" class="summary-letter"><b>D</b></a>
<a href="#SEC18_2" class="summary-letter"><b>M</b></a>
<a href="#SEC18_3" class="summary-letter"><b>N</b></a>
<a href="#SEC18_4" class="summary-letter"><b>R</b></a>
<a href="#SEC18_5" class="summary-letter"><b>U</b></a>
<a href="#SEC18_6" class="summary-letter"><b>V</b></a>
<a href="#SEC18_7" class="summary-letter"><b>X</b></a>
</td></tr></table>
<hr size="6">
<a name="SEC_Contents"></a>
<table cellpadding="1" cellspacing="1" border="0">
<tr><td valign="middle" align="left">[<a href="#Top" title="Cover (top) of document">Top</a>]</td>
<td valign="middle" align="left">[<a href="#SEC_Contents" title="Table of contents">Contents</a>]</td>
<td valign="middle" align="left">[<a href="#SEC16" title="Index">Index</a>]</td>
<td valign="middle" align="left">[<a href="#SEC_About" title="About (help)"> ? </a>]</td>
</tr></table>
<h1>Table of Contents</h1>
<div class="contents">
<ul class="toc">
<li><a name="TOC1" href="#SEC1">1. Xlibscm</a></li>
<li><a name="TOC2" href="#SEC2">2. Display and Screens</a></li>
<li><a name="TOC3" href="#SEC3">3. Drawables</a>
<ul class="toc">
<li><a name="TOC4" href="#SEC4">3.1 Windows and Pixmaps</a></li>
<li><a name="TOC5" href="#SEC5">3.2 Window Attributes</a></li>
<li><a name="TOC6" href="#SEC6">3.3 Window Properties and Visibility</a></li>
</ul></li>
<li><a name="TOC7" href="#SEC7">4. Graphics Context</a></li>
<li><a name="TOC8" href="#SEC9">5. Cursor</a></li>
<li><a name="TOC9" href="#SEC10">6. Colormap</a></li>
<li><a name="TOC10" href="#SEC11">7. Rendering</a></li>
<li><a name="TOC11" href="#SEC14">8. Images</a></li>
<li><a name="TOC12" href="#SEC15">9. Event</a></li>
<li><a name="TOC13" href="#SEC16">Procedure and Macro Index</a></li>
<li><a name="TOC14" href="#SEC17">Variable Index</a></li>
<li><a name="TOC15" href="#SEC18">Concept Index</a></li>
</ul>
</div>
<hr size="1">
<a name="SEC_About"></a>
<table cellpadding="1" cellspacing="1" border="0">
<tr><td valign="middle" align="left">[<a href="#Top" title="Cover (top) of document">Top</a>]</td>
<td valign="middle" align="left">[<a href="#SEC_Contents" title="Table of contents">Contents</a>]</td>
<td valign="middle" align="left">[<a href="#SEC16" title="Index">Index</a>]</td>
<td valign="middle" align="left">[<a href="#SEC_About" title="About (help)"> ? </a>]</td>
</tr></table>
<h1>About This Document</h1>
<p>
This document was generated by <em>Thomas Bushnell BSG</em> on <em>October, 27 2005</em> using <a href="http://texi2html.cvshome.org/"><em>texi2html 1.76</em></a>.
</p>
<p>
The buttons in the navigation panels have the following meaning:
</p>
<table border="1">
<tr>
<th> Button </th>
<th> Name </th>
<th> Go to </th>
<th> From 1.2.3 go to</th>
</tr>
<tr>
<td align="center"> [ < ] </td>
<td align="center">Back</td>
<td>previous section in reading order</td>
<td>1.2.2</td>
</tr>
<tr>
<td align="center"> [ > ] </td>
<td align="center">Forward</td>
<td>next section in reading order</td>
<td>1.2.4</td>
</tr>
<tr>
<td align="center"> [ << ] </td>
<td align="center">FastBack</td>
<td>beginning of this chapter or previous chapter</td>
<td>1</td>
</tr>
<tr>
<td align="center"> [ Up ] </td>
<td align="center">Up</td>
<td>up section</td>
<td>1.2</td>
</tr>
<tr>
<td align="center"> [ >> ] </td>
<td align="center">FastForward</td>
<td>next chapter</td>
<td>2</td>
</tr>
<tr>
<td align="center"> [Top] </td>
<td align="center">Top</td>
<td>cover (top) of document</td>
<td> </td>
</tr>
<tr>
<td align="center"> [Contents] </td>
<td align="center">Contents</td>
<td>table of contents</td>
<td> </td>
</tr>
<tr>
<td align="center"> [Index] </td>
<td align="center">Index</td>
<td>index</td>
<td> </td>
</tr>
<tr>
<td align="center"> [ ? ] </td>
<td align="center">About</td>
<td>about (help)</td>
<td> </td>
</tr>
</table>
<p>
where the <strong> Example </strong> assumes that the current position is at <strong> Subsubsection One-Two-Three </strong> of a document of the following structure:
</p>
<ul>
<li> 1. Section One
<ul>
<li>1.1 Subsection One-One
<ul>
<li>...</li>
</ul>
</li>
<li>1.2 Subsection One-Two
<ul>
<li>1.2.1 Subsubsection One-Two-One</li>
<li>1.2.2 Subsubsection One-Two-Two</li>
<li>1.2.3 Subsubsection One-Two-Three
<strong><== Current Position </strong></li>
<li>1.2.4 Subsubsection One-Two-Four</li>
</ul>
</li>
<li>1.3 Subsection One-Three
<ul>
<li>...</li>
</ul>
</li>
<li>1.4 Subsection One-Four</li>
</ul>
</li>
</ul>
<hr size="1">
<p>
<font size="-1">
This document was generated by <em>Thomas Bushnell BSG</em> on <em>October, 27 2005</em> using <a href="http://texi2html.cvshome.org/"><em>texi2html 1.76</em></a>.
</font>
<br>
</p>
</body>
</html>
|
