This file is indexed.

/usr/share/gtk-doc/html/cogl/cogl-Materials.html is in libcogl-doc 1.10.2-7.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

   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
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Materials</title>
<meta name="generator" content="DocBook XSL Stylesheets V1.76.1">
<link rel="home" href="index.html" title="Cogl Reference Manual">
<link rel="up" href="ch01.html" title="Cogl - a modern 3D graphics API">
<link rel="prev" href="cogl-Blend-Strings.html" title="Material Blend Strings">
<link rel="next" href="cogl-Primitives.html" title="Primitives">
<meta name="generator" content="GTK-Doc V1.18 (XML mode)">
<link rel="stylesheet" href="style.css" type="text/css">
</head>
<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
<table class="navigation" id="top" width="100%" summary="Navigation header" cellpadding="2" cellspacing="2">
<tr valign="middle">
<td><a accesskey="p" href="cogl-Blend-Strings.html"><img src="left.png" width="24" height="24" border="0" alt="Prev"></a></td>
<td><a accesskey="u" href="ch01.html"><img src="up.png" width="24" height="24" border="0" alt="Up"></a></td>
<td><a accesskey="h" href="index.html"><img src="home.png" width="24" height="24" border="0" alt="Home"></a></td>
<th width="100%" align="center">Cogl Reference Manual</th>
<td><a accesskey="n" href="cogl-Primitives.html"><img src="right.png" width="24" height="24" border="0" alt="Next"></a></td>
</tr>
<tr><td colspan="5" class="shortcuts">
<a href="#cogl-Materials.synopsis" class="shortcut">Top</a>
                   | 
                  <a href="#cogl-Materials.description" class="shortcut">Description</a>
</td></tr>
</table>
<div class="refentry">
<a name="cogl-Materials"></a><div class="titlepage"></div>
<div class="refnamediv"><table width="100%"><tr>
<td valign="top">
<h2><span class="refentrytitle"><a name="cogl-Materials.top_of_page"></a>Materials</span></h2>
<p>Materials — Fuctions for creating and manipulating materials</p>
</td>
<td valign="top" align="right"></td>
</tr></table></div>
<div class="refsynopsisdiv">
<a name="cogl-Materials.synopsis"></a><h2>Synopsis</h2>
<pre class="synopsis">                    <a class="link" href="cogl-Materials.html#CoglMaterial" title="CoglMaterial">CoglMaterial</a>;
                    <a class="link" href="cogl-Materials.html#CoglMaterialLayer" title="CoglMaterialLayer">CoglMaterialLayer</a>;
<span class="returnvalue">gboolean</span>            (<a class="link" href="cogl-Materials.html#CoglMaterialLayerCallback" title="CoglMaterialLayerCallback ()">*CoglMaterialLayerCallback</a>)        (<em class="parameter"><code><a class="link" href="cogl-Materials.html#CoglMaterial" title="CoglMaterial"><span class="type">CoglMaterial</span></a> *material</code></em>,
                                                         <em class="parameter"><code><span class="type">int</span> layer_index</code></em>,
                                                         <em class="parameter"><code><span class="type">void</span> *user_data</code></em>);
<a class="link" href="cogl-Materials.html#CoglMaterial" title="CoglMaterial"><span class="returnvalue">CoglMaterial</span></a> *      <a class="link" href="cogl-Materials.html#cogl-material-new" title="cogl_material_new ()">cogl_material_new</a>                   (<em class="parameter"><code><span class="type">void</span></code></em>);
<a class="link" href="cogl-Materials.html#CoglMaterial" title="CoglMaterial"><span class="returnvalue">CoglMaterial</span></a> *      <a class="link" href="cogl-Materials.html#cogl-material-copy" title="cogl_material_copy ()">cogl_material_copy</a>                  (<em class="parameter"><code><a class="link" href="cogl-Materials.html#CoglMaterial" title="CoglMaterial"><span class="type">CoglMaterial</span></a> *source</code></em>);
<span class="returnvalue">gboolean</span>            <a class="link" href="cogl-Materials.html#cogl-is-material" title="cogl_is_material ()">cogl_is_material</a>                    (<em class="parameter"><code><a class="link" href="cogl-General-API.html#CoglHandle" title="CoglHandle"><span class="type">CoglHandle</span></a> handle</code></em>);
<span class="returnvalue">void</span>                <a class="link" href="cogl-Materials.html#cogl-material-set-color" title="cogl_material_set_color ()">cogl_material_set_color</a>             (<em class="parameter"><code><a class="link" href="cogl-Materials.html#CoglMaterial" title="CoglMaterial"><span class="type">CoglMaterial</span></a> *material</code></em>,
                                                         <em class="parameter"><code>const <a class="link" href="cogl-Color-Type.html#CoglColor" title="struct CoglColor"><span class="type">CoglColor</span></a> *color</code></em>);
<span class="returnvalue">void</span>                <a class="link" href="cogl-Materials.html#cogl-material-set-color4ub" title="cogl_material_set_color4ub ()">cogl_material_set_color4ub</a>          (<em class="parameter"><code><a class="link" href="cogl-Materials.html#CoglMaterial" title="CoglMaterial"><span class="type">CoglMaterial</span></a> *material</code></em>,
                                                         <em class="parameter"><code><span class="type">guint8</span> red</code></em>,
                                                         <em class="parameter"><code><span class="type">guint8</span> green</code></em>,
                                                         <em class="parameter"><code><span class="type">guint8</span> blue</code></em>,
                                                         <em class="parameter"><code><span class="type">guint8</span> alpha</code></em>);
<span class="returnvalue">void</span>                <a class="link" href="cogl-Materials.html#cogl-material-set-color4f" title="cogl_material_set_color4f ()">cogl_material_set_color4f</a>           (<em class="parameter"><code><a class="link" href="cogl-Materials.html#CoglMaterial" title="CoglMaterial"><span class="type">CoglMaterial</span></a> *material</code></em>,
                                                         <em class="parameter"><code><span class="type">float</span> red</code></em>,
                                                         <em class="parameter"><code><span class="type">float</span> green</code></em>,
                                                         <em class="parameter"><code><span class="type">float</span> blue</code></em>,
                                                         <em class="parameter"><code><span class="type">float</span> alpha</code></em>);
<span class="returnvalue">void</span>                <a class="link" href="cogl-Materials.html#cogl-material-get-color" title="cogl_material_get_color ()">cogl_material_get_color</a>             (<em class="parameter"><code><a class="link" href="cogl-Materials.html#CoglMaterial" title="CoglMaterial"><span class="type">CoglMaterial</span></a> *material</code></em>,
                                                         <em class="parameter"><code><a class="link" href="cogl-Color-Type.html#CoglColor" title="struct CoglColor"><span class="type">CoglColor</span></a> *color</code></em>);
<span class="returnvalue">void</span>                <a class="link" href="cogl-Materials.html#cogl-material-set-ambient" title="cogl_material_set_ambient ()">cogl_material_set_ambient</a>           (<em class="parameter"><code><a class="link" href="cogl-Materials.html#CoglMaterial" title="CoglMaterial"><span class="type">CoglMaterial</span></a> *material</code></em>,
                                                         <em class="parameter"><code>const <a class="link" href="cogl-Color-Type.html#CoglColor" title="struct CoglColor"><span class="type">CoglColor</span></a> *ambient</code></em>);
<span class="returnvalue">void</span>                <a class="link" href="cogl-Materials.html#cogl-material-get-ambient" title="cogl_material_get_ambient ()">cogl_material_get_ambient</a>           (<em class="parameter"><code><a class="link" href="cogl-Materials.html#CoglMaterial" title="CoglMaterial"><span class="type">CoglMaterial</span></a> *material</code></em>,
                                                         <em class="parameter"><code><a class="link" href="cogl-Color-Type.html#CoglColor" title="struct CoglColor"><span class="type">CoglColor</span></a> *ambient</code></em>);
<span class="returnvalue">void</span>                <a class="link" href="cogl-Materials.html#cogl-material-set-diffuse" title="cogl_material_set_diffuse ()">cogl_material_set_diffuse</a>           (<em class="parameter"><code><a class="link" href="cogl-Materials.html#CoglMaterial" title="CoglMaterial"><span class="type">CoglMaterial</span></a> *material</code></em>,
                                                         <em class="parameter"><code>const <a class="link" href="cogl-Color-Type.html#CoglColor" title="struct CoglColor"><span class="type">CoglColor</span></a> *diffuse</code></em>);
<span class="returnvalue">void</span>                <a class="link" href="cogl-Materials.html#cogl-material-get-diffuse" title="cogl_material_get_diffuse ()">cogl_material_get_diffuse</a>           (<em class="parameter"><code><a class="link" href="cogl-Materials.html#CoglMaterial" title="CoglMaterial"><span class="type">CoglMaterial</span></a> *material</code></em>,
                                                         <em class="parameter"><code><a class="link" href="cogl-Color-Type.html#CoglColor" title="struct CoglColor"><span class="type">CoglColor</span></a> *diffuse</code></em>);
<span class="returnvalue">void</span>                <a class="link" href="cogl-Materials.html#cogl-material-set-ambient-and-diffuse" title="cogl_material_set_ambient_and_diffuse ()">cogl_material_set_ambient_and_diffuse</a>
                                                        (<em class="parameter"><code><a class="link" href="cogl-Materials.html#CoglMaterial" title="CoglMaterial"><span class="type">CoglMaterial</span></a> *material</code></em>,
                                                         <em class="parameter"><code>const <a class="link" href="cogl-Color-Type.html#CoglColor" title="struct CoglColor"><span class="type">CoglColor</span></a> *color</code></em>);
<span class="returnvalue">void</span>                <a class="link" href="cogl-Materials.html#cogl-material-set-emission" title="cogl_material_set_emission ()">cogl_material_set_emission</a>          (<em class="parameter"><code><a class="link" href="cogl-Materials.html#CoglMaterial" title="CoglMaterial"><span class="type">CoglMaterial</span></a> *material</code></em>,
                                                         <em class="parameter"><code>const <a class="link" href="cogl-Color-Type.html#CoglColor" title="struct CoglColor"><span class="type">CoglColor</span></a> *emission</code></em>);
<span class="returnvalue">void</span>                <a class="link" href="cogl-Materials.html#cogl-material-get-emission" title="cogl_material_get_emission ()">cogl_material_get_emission</a>          (<em class="parameter"><code><a class="link" href="cogl-Materials.html#CoglMaterial" title="CoglMaterial"><span class="type">CoglMaterial</span></a> *material</code></em>,
                                                         <em class="parameter"><code><a class="link" href="cogl-Color-Type.html#CoglColor" title="struct CoglColor"><span class="type">CoglColor</span></a> *emission</code></em>);
<span class="returnvalue">void</span>                <a class="link" href="cogl-Materials.html#cogl-material-set-specular" title="cogl_material_set_specular ()">cogl_material_set_specular</a>          (<em class="parameter"><code><a class="link" href="cogl-Materials.html#CoglMaterial" title="CoglMaterial"><span class="type">CoglMaterial</span></a> *material</code></em>,
                                                         <em class="parameter"><code>const <a class="link" href="cogl-Color-Type.html#CoglColor" title="struct CoglColor"><span class="type">CoglColor</span></a> *specular</code></em>);
<span class="returnvalue">void</span>                <a class="link" href="cogl-Materials.html#cogl-material-get-specular" title="cogl_material_get_specular ()">cogl_material_get_specular</a>          (<em class="parameter"><code><a class="link" href="cogl-Materials.html#CoglMaterial" title="CoglMaterial"><span class="type">CoglMaterial</span></a> *material</code></em>,
                                                         <em class="parameter"><code><a class="link" href="cogl-Color-Type.html#CoglColor" title="struct CoglColor"><span class="type">CoglColor</span></a> *specular</code></em>);
<span class="returnvalue">void</span>                <a class="link" href="cogl-Materials.html#cogl-material-set-shininess" title="cogl_material_set_shininess ()">cogl_material_set_shininess</a>         (<em class="parameter"><code><a class="link" href="cogl-Materials.html#CoglMaterial" title="CoglMaterial"><span class="type">CoglMaterial</span></a> *material</code></em>,
                                                         <em class="parameter"><code><span class="type">float</span> shininess</code></em>);
<span class="returnvalue">float</span>               <a class="link" href="cogl-Materials.html#cogl-material-get-shininess" title="cogl_material_get_shininess ()">cogl_material_get_shininess</a>         (<em class="parameter"><code><a class="link" href="cogl-Materials.html#CoglMaterial" title="CoglMaterial"><span class="type">CoglMaterial</span></a> *material</code></em>);
enum                <a class="link" href="cogl-Materials.html#CoglMaterialAlphaFunc" title="enum CoglMaterialAlphaFunc">CoglMaterialAlphaFunc</a>;
<span class="returnvalue">void</span>                <a class="link" href="cogl-Materials.html#cogl-material-set-alpha-test-function" title="cogl_material_set_alpha_test_function ()">cogl_material_set_alpha_test_function</a>
                                                        (<em class="parameter"><code><a class="link" href="cogl-Materials.html#CoglMaterial" title="CoglMaterial"><span class="type">CoglMaterial</span></a> *material</code></em>,
                                                         <em class="parameter"><code><a class="link" href="cogl-Materials.html#CoglMaterialAlphaFunc" title="enum CoglMaterialAlphaFunc"><span class="type">CoglMaterialAlphaFunc</span></a> alpha_func</code></em>,
                                                         <em class="parameter"><code><span class="type">float</span> alpha_reference</code></em>);
#define             <a class="link" href="cogl-Materials.html#COGL-BLEND-STRING-ERROR:CAPS" title="COGL_BLEND_STRING_ERROR">COGL_BLEND_STRING_ERROR</a>
enum                <a class="link" href="cogl-Materials.html#CoglBlendStringError" title="enum CoglBlendStringError">CoglBlendStringError</a>;
<span class="returnvalue">gboolean</span>            <a class="link" href="cogl-Materials.html#cogl-material-set-blend" title="cogl_material_set_blend ()">cogl_material_set_blend</a>             (<em class="parameter"><code><a class="link" href="cogl-Materials.html#CoglMaterial" title="CoglMaterial"><span class="type">CoglMaterial</span></a> *material</code></em>,
                                                         <em class="parameter"><code>const <span class="type">char</span> *blend_string</code></em>,
                                                         <em class="parameter"><code><span class="type">GError</span> **error</code></em>);
<span class="returnvalue">void</span>                <a class="link" href="cogl-Materials.html#cogl-material-set-blend-constant" title="cogl_material_set_blend_constant ()">cogl_material_set_blend_constant</a>    (<em class="parameter"><code><a class="link" href="cogl-Materials.html#CoglMaterial" title="CoglMaterial"><span class="type">CoglMaterial</span></a> *material</code></em>,
                                                         <em class="parameter"><code>const <a class="link" href="cogl-Color-Type.html#CoglColor" title="struct CoglColor"><span class="type">CoglColor</span></a> *constant_color</code></em>);
<span class="returnvalue">void</span>                <a class="link" href="cogl-Materials.html#cogl-material-set-point-size" title="cogl_material_set_point_size ()">cogl_material_set_point_size</a>        (<em class="parameter"><code><a class="link" href="cogl-Materials.html#CoglMaterial" title="CoglMaterial"><span class="type">CoglMaterial</span></a> *material</code></em>,
                                                         <em class="parameter"><code><span class="type">float</span> point_size</code></em>);
<span class="returnvalue">float</span>               <a class="link" href="cogl-Materials.html#cogl-material-get-point-size" title="cogl_material_get_point_size ()">cogl_material_get_point_size</a>        (<em class="parameter"><code><a class="link" href="cogl-Materials.html#CoglMaterial" title="CoglMaterial"><span class="type">CoglMaterial</span></a> *material</code></em>);
<span class="returnvalue">void</span>                <a class="link" href="cogl-Materials.html#cogl-material-set-layer" title="cogl_material_set_layer ()">cogl_material_set_layer</a>             (<em class="parameter"><code><a class="link" href="cogl-Materials.html#CoglMaterial" title="CoglMaterial"><span class="type">CoglMaterial</span></a> *material</code></em>,
                                                         <em class="parameter"><code><span class="type">int</span> layer_index</code></em>,
                                                         <em class="parameter"><code><a class="link" href="cogl-General-API.html#CoglHandle" title="CoglHandle"><span class="type">CoglHandle</span></a> texture</code></em>);
<span class="returnvalue">void</span>                <a class="link" href="cogl-Materials.html#cogl-material-remove-layer" title="cogl_material_remove_layer ()">cogl_material_remove_layer</a>          (<em class="parameter"><code><a class="link" href="cogl-Materials.html#CoglMaterial" title="CoglMaterial"><span class="type">CoglMaterial</span></a> *material</code></em>,
                                                         <em class="parameter"><code><span class="type">int</span> layer_index</code></em>);
<span class="returnvalue">gboolean</span>            <a class="link" href="cogl-Materials.html#cogl-material-set-layer-combine" title="cogl_material_set_layer_combine ()">cogl_material_set_layer_combine</a>     (<em class="parameter"><code><a class="link" href="cogl-Materials.html#CoglMaterial" title="CoglMaterial"><span class="type">CoglMaterial</span></a> *material</code></em>,
                                                         <em class="parameter"><code><span class="type">int</span> layer_index</code></em>,
                                                         <em class="parameter"><code>const <span class="type">char</span> *blend_string</code></em>,
                                                         <em class="parameter"><code><span class="type">GError</span> **error</code></em>);
<span class="returnvalue">void</span>                <a class="link" href="cogl-Materials.html#cogl-material-set-layer-combine-constant" title="cogl_material_set_layer_combine_constant ()">cogl_material_set_layer_combine_constant</a>
                                                        (<em class="parameter"><code><a class="link" href="cogl-Materials.html#CoglMaterial" title="CoglMaterial"><span class="type">CoglMaterial</span></a> *material</code></em>,
                                                         <em class="parameter"><code><span class="type">int</span> layer_index</code></em>,
                                                         <em class="parameter"><code>const <a class="link" href="cogl-Color-Type.html#CoglColor" title="struct CoglColor"><span class="type">CoglColor</span></a> *constant</code></em>);
<span class="returnvalue">void</span>                <a class="link" href="cogl-Materials.html#cogl-material-set-layer-matrix" title="cogl_material_set_layer_matrix ()">cogl_material_set_layer_matrix</a>      (<em class="parameter"><code><a class="link" href="cogl-Materials.html#CoglMaterial" title="CoglMaterial"><span class="type">CoglMaterial</span></a> *material</code></em>,
                                                         <em class="parameter"><code><span class="type">int</span> layer_index</code></em>,
                                                         <em class="parameter"><code>const <a class="link" href="cogl-Matrices.html#CoglMatrix" title="CoglMatrix"><span class="type">CoglMatrix</span></a> *matrix</code></em>);
<span class="returnvalue">gboolean</span>            <a class="link" href="cogl-Materials.html#cogl-material-set-layer-point-sprite-coords-enabled" title="cogl_material_set_layer_point_sprite_coords_enabled ()">cogl_material_set_layer_point_sprite_coords_enabled</a>
                                                        (<em class="parameter"><code><a class="link" href="cogl-Materials.html#CoglMaterial" title="CoglMaterial"><span class="type">CoglMaterial</span></a> *material</code></em>,
                                                         <em class="parameter"><code><span class="type">int</span> layer_index</code></em>,
                                                         <em class="parameter"><code><span class="type">gboolean</span> enable</code></em>,
                                                         <em class="parameter"><code><span class="type">GError</span> **error</code></em>);
<span class="returnvalue">gboolean</span>            <a class="link" href="cogl-Materials.html#cogl-material-get-layer-point-sprite-coords-enabled" title="cogl_material_get_layer_point_sprite_coords_enabled ()">cogl_material_get_layer_point_sprite_coords_enabled</a>
                                                        (<em class="parameter"><code><a class="link" href="cogl-Materials.html#CoglMaterial" title="CoglMaterial"><span class="type">CoglMaterial</span></a> *material</code></em>,
                                                         <em class="parameter"><code><span class="type">int</span> layer_index</code></em>);
<span class="returnvalue">int</span>                 <a class="link" href="cogl-Materials.html#cogl-material-get-n-layers" title="cogl_material_get_n_layers ()">cogl_material_get_n_layers</a>          (<em class="parameter"><code><a class="link" href="cogl-Materials.html#CoglMaterial" title="CoglMaterial"><span class="type">CoglMaterial</span></a> *material</code></em>);
enum                <a class="link" href="cogl-Materials.html#CoglMaterialFilter" title="enum CoglMaterialFilter">CoglMaterialFilter</a>;
<span class="returnvalue">void</span>                <a class="link" href="cogl-Materials.html#cogl-material-set-layer-filters" title="cogl_material_set_layer_filters ()">cogl_material_set_layer_filters</a>     (<em class="parameter"><code><a class="link" href="cogl-Materials.html#CoglMaterial" title="CoglMaterial"><span class="type">CoglMaterial</span></a> *material</code></em>,
                                                         <em class="parameter"><code><span class="type">int</span> layer_index</code></em>,
                                                         <em class="parameter"><code><a class="link" href="cogl-Materials.html#CoglMaterialFilter" title="enum CoglMaterialFilter"><span class="type">CoglMaterialFilter</span></a> min_filter</code></em>,
                                                         <em class="parameter"><code><a class="link" href="cogl-Materials.html#CoglMaterialFilter" title="enum CoglMaterialFilter"><span class="type">CoglMaterialFilter</span></a> mag_filter</code></em>);
enum                <a class="link" href="cogl-Materials.html#CoglMaterialLayerType" title="enum CoglMaterialLayerType">CoglMaterialLayerType</a>;
<a class="link" href="cogl-Materials.html#CoglMaterialLayerType" title="enum CoglMaterialLayerType"><span class="returnvalue">CoglMaterialLayerType</span></a> <a class="link" href="cogl-Materials.html#cogl-material-layer-get-type" title="cogl_material_layer_get_type ()">cogl_material_layer_get_type</a>      (<em class="parameter"><code><a class="link" href="cogl-Materials.html#CoglMaterialLayer" title="CoglMaterialLayer"><span class="type">CoglMaterialLayer</span></a> *layer</code></em>);
<a class="link" href="cogl-General-API.html#CoglHandle" title="CoglHandle"><span class="returnvalue">CoglHandle</span></a>          <a class="link" href="cogl-Materials.html#cogl-material-layer-get-texture" title="cogl_material_layer_get_texture ()">cogl_material_layer_get_texture</a>     (<em class="parameter"><code><a class="link" href="cogl-Materials.html#CoglMaterialLayer" title="CoglMaterialLayer"><span class="type">CoglMaterialLayer</span></a> *layer</code></em>);
<a class="link" href="cogl-Materials.html#CoglMaterialFilter" title="enum CoglMaterialFilter"><span class="returnvalue">CoglMaterialFilter</span></a>  <a class="link" href="cogl-Materials.html#cogl-material-layer-get-min-filter" title="cogl_material_layer_get_min_filter ()">cogl_material_layer_get_min_filter</a>  (<em class="parameter"><code><a class="link" href="cogl-Materials.html#CoglMaterialLayer" title="CoglMaterialLayer"><span class="type">CoglMaterialLayer</span></a> *layer</code></em>);
<a class="link" href="cogl-Materials.html#CoglMaterialFilter" title="enum CoglMaterialFilter"><span class="returnvalue">CoglMaterialFilter</span></a>  <a class="link" href="cogl-Materials.html#cogl-material-layer-get-mag-filter" title="cogl_material_layer_get_mag_filter ()">cogl_material_layer_get_mag_filter</a>  (<em class="parameter"><code><a class="link" href="cogl-Materials.html#CoglMaterialLayer" title="CoglMaterialLayer"><span class="type">CoglMaterialLayer</span></a> *layer</code></em>);
enum                <a class="link" href="cogl-Materials.html#CoglMaterialWrapMode" title="enum CoglMaterialWrapMode">CoglMaterialWrapMode</a>;
<span class="returnvalue">void</span>                <a class="link" href="cogl-Materials.html#cogl-material-set-layer-wrap-mode" title="cogl_material_set_layer_wrap_mode ()">cogl_material_set_layer_wrap_mode</a>   (<em class="parameter"><code><a class="link" href="cogl-Materials.html#CoglMaterial" title="CoglMaterial"><span class="type">CoglMaterial</span></a> *material</code></em>,
                                                         <em class="parameter"><code><span class="type">int</span> layer_index</code></em>,
                                                         <em class="parameter"><code><a class="link" href="cogl-Materials.html#CoglMaterialWrapMode" title="enum CoglMaterialWrapMode"><span class="type">CoglMaterialWrapMode</span></a> mode</code></em>);
<span class="returnvalue">void</span>                <a class="link" href="cogl-Materials.html#cogl-material-set-layer-wrap-mode-s" title="cogl_material_set_layer_wrap_mode_s ()">cogl_material_set_layer_wrap_mode_s</a> (<em class="parameter"><code><a class="link" href="cogl-Materials.html#CoglMaterial" title="CoglMaterial"><span class="type">CoglMaterial</span></a> *material</code></em>,
                                                         <em class="parameter"><code><span class="type">int</span> layer_index</code></em>,
                                                         <em class="parameter"><code><a class="link" href="cogl-Materials.html#CoglMaterialWrapMode" title="enum CoglMaterialWrapMode"><span class="type">CoglMaterialWrapMode</span></a> mode</code></em>);
<span class="returnvalue">void</span>                <a class="link" href="cogl-Materials.html#cogl-material-set-layer-wrap-mode-t" title="cogl_material_set_layer_wrap_mode_t ()">cogl_material_set_layer_wrap_mode_t</a> (<em class="parameter"><code><a class="link" href="cogl-Materials.html#CoglMaterial" title="CoglMaterial"><span class="type">CoglMaterial</span></a> *material</code></em>,
                                                         <em class="parameter"><code><span class="type">int</span> layer_index</code></em>,
                                                         <em class="parameter"><code><a class="link" href="cogl-Materials.html#CoglMaterialWrapMode" title="enum CoglMaterialWrapMode"><span class="type">CoglMaterialWrapMode</span></a> mode</code></em>);
<span class="returnvalue">void</span>                <a class="link" href="cogl-Materials.html#cogl-material-set-layer-wrap-mode-p" title="cogl_material_set_layer_wrap_mode_p ()">cogl_material_set_layer_wrap_mode_p</a> (<em class="parameter"><code><a class="link" href="cogl-Materials.html#CoglMaterial" title="CoglMaterial"><span class="type">CoglMaterial</span></a> *material</code></em>,
                                                         <em class="parameter"><code><span class="type">int</span> layer_index</code></em>,
                                                         <em class="parameter"><code><a class="link" href="cogl-Materials.html#CoglMaterialWrapMode" title="enum CoglMaterialWrapMode"><span class="type">CoglMaterialWrapMode</span></a> mode</code></em>);
<a class="link" href="cogl-Materials.html#CoglMaterialWrapMode" title="enum CoglMaterialWrapMode"><span class="returnvalue">CoglMaterialWrapMode</span></a> <a class="link" href="cogl-Materials.html#cogl-material-get-layer-wrap-mode-s" title="cogl_material_get_layer_wrap_mode_s ()">cogl_material_get_layer_wrap_mode_s</a>
                                                        (<em class="parameter"><code><a class="link" href="cogl-Materials.html#CoglMaterial" title="CoglMaterial"><span class="type">CoglMaterial</span></a> *material</code></em>,
                                                         <em class="parameter"><code><span class="type">int</span> layer_index</code></em>);
<a class="link" href="cogl-Materials.html#CoglMaterialWrapMode" title="enum CoglMaterialWrapMode"><span class="returnvalue">CoglMaterialWrapMode</span></a> <a class="link" href="cogl-Materials.html#cogl-material-get-layer-wrap-mode-t" title="cogl_material_get_layer_wrap_mode_t ()">cogl_material_get_layer_wrap_mode_t</a>
                                                        (<em class="parameter"><code><a class="link" href="cogl-Materials.html#CoglMaterial" title="CoglMaterial"><span class="type">CoglMaterial</span></a> *material</code></em>,
                                                         <em class="parameter"><code><span class="type">int</span> layer_index</code></em>);
<a class="link" href="cogl-Materials.html#CoglMaterialWrapMode" title="enum CoglMaterialWrapMode"><span class="returnvalue">CoglMaterialWrapMode</span></a> <a class="link" href="cogl-Materials.html#cogl-material-get-layer-wrap-mode-p" title="cogl_material_get_layer_wrap_mode_p ()">cogl_material_get_layer_wrap_mode_p</a>
                                                        (<em class="parameter"><code><a class="link" href="cogl-Materials.html#CoglMaterial" title="CoglMaterial"><span class="type">CoglMaterial</span></a> *material</code></em>,
                                                         <em class="parameter"><code><span class="type">int</span> layer_index</code></em>);
<span class="returnvalue">GType</span>               <a class="link" href="cogl-Materials.html#cogl-material-wrap-mode-get-type" title="cogl_material_wrap_mode_get_type ()">cogl_material_wrap_mode_get_type</a>    (<em class="parameter"><code><span class="type">void</span></code></em>);
<span class="returnvalue">void</span>                <a class="link" href="cogl-Materials.html#cogl-material-set-user-program" title="cogl_material_set_user_program ()">cogl_material_set_user_program</a>      (<em class="parameter"><code><a class="link" href="cogl-Materials.html#CoglMaterial" title="CoglMaterial"><span class="type">CoglMaterial</span></a> *material</code></em>,
                                                         <em class="parameter"><code><a class="link" href="cogl-General-API.html#CoglHandle" title="CoglHandle"><span class="type">CoglHandle</span></a> program</code></em>);
<a class="link" href="cogl-General-API.html#CoglHandle" title="CoglHandle"><span class="returnvalue">CoglHandle</span></a>          <a class="link" href="cogl-Materials.html#cogl-material-get-user-program" title="cogl_material_get_user_program ()">cogl_material_get_user_program</a>      (<em class="parameter"><code><a class="link" href="cogl-Materials.html#CoglMaterial" title="CoglMaterial"><span class="type">CoglMaterial</span></a> *material</code></em>);
<span class="returnvalue">void</span>                <a class="link" href="cogl-Materials.html#cogl-material-foreach-layer" title="cogl_material_foreach_layer ()">cogl_material_foreach_layer</a>         (<em class="parameter"><code><a class="link" href="cogl-Materials.html#CoglMaterial" title="CoglMaterial"><span class="type">CoglMaterial</span></a> *material</code></em>,
                                                         <em class="parameter"><code><a class="link" href="cogl-Materials.html#CoglMaterialLayerCallback" title="CoglMaterialLayerCallback ()"><span class="type">CoglMaterialLayerCallback</span></a> callback</code></em>,
                                                         <em class="parameter"><code><span class="type">void</span> *user_data</code></em>);
</pre>
</div>
<div class="refsect1">
<a name="cogl-Materials.description"></a><h2>Description</h2>
<p>
COGL allows creating and manipulating materials used to fill in
geometry. Materials may simply be lighting attributes (such as an
ambient and diffuse colour) or might represent one or more textures
blended together.
</p>
</div>
<div class="refsect1">
<a name="cogl-Materials.details"></a><h2>Details</h2>
<div class="refsect2">
<a name="CoglMaterial"></a><h3>CoglMaterial</h3>
<pre class="programlisting">typedef struct _CoglMaterial CoglMaterial;</pre>
</div>
<hr>
<div class="refsect2">
<a name="CoglMaterialLayer"></a><h3>CoglMaterialLayer</h3>
<pre class="programlisting">typedef struct _CoglMaterialLayer CoglMaterialLayer;</pre>
</div>
<hr>
<div class="refsect2">
<a name="CoglMaterialLayerCallback"></a><h3>CoglMaterialLayerCallback ()</h3>
<pre class="programlisting"><span class="returnvalue">gboolean</span>            (*CoglMaterialLayerCallback)        (<em class="parameter"><code><a class="link" href="cogl-Materials.html#CoglMaterial" title="CoglMaterial"><span class="type">CoglMaterial</span></a> *material</code></em>,
                                                         <em class="parameter"><code><span class="type">int</span> layer_index</code></em>,
                                                         <em class="parameter"><code><span class="type">void</span> *user_data</code></em>);</pre>
<p>
The callback prototype used with <a class="link" href="cogl-Materials.html#cogl-material-foreach-layer" title="cogl_material_foreach_layer ()"><code class="function">cogl_material_foreach_layer()</code></a> for
iterating all the layers of a <em class="parameter"><code>material</code></em>.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>material</code></em> :</span></p></td>
<td>The <a class="link" href="cogl-Materials.html#CoglMaterial" title="CoglMaterial"><span class="type">CoglMaterial</span></a> whos layers are being iterated</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>layer_index</code></em> :</span></p></td>
<td>The current layer index</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>user_data</code></em> :</span></p></td>
<td>The private data passed to <a class="link" href="cogl-Materials.html#cogl-material-foreach-layer" title="cogl_material_foreach_layer ()"><code class="function">cogl_material_foreach_layer()</code></a>
</td>
</tr>
</tbody>
</table></div>
<p class="since">Since 1.4</p>
<p class="stability">Stability Level: Unstable</p>
</div>
<hr>
<div class="refsect2">
<a name="cogl-material-new"></a><h3>cogl_material_new ()</h3>
<pre class="programlisting"><a class="link" href="cogl-Materials.html#CoglMaterial" title="CoglMaterial"><span class="returnvalue">CoglMaterial</span></a> *      cogl_material_new                   (<em class="parameter"><code><span class="type">void</span></code></em>);</pre>
<p>
Allocates and initializes a blank white material
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody><tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>a pointer to a new <a class="link" href="cogl-Materials.html#CoglMaterial" title="CoglMaterial"><span class="type">CoglMaterial</span></a>
</td>
</tr></tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="cogl-material-copy"></a><h3>cogl_material_copy ()</h3>
<pre class="programlisting"><a class="link" href="cogl-Materials.html#CoglMaterial" title="CoglMaterial"><span class="returnvalue">CoglMaterial</span></a> *      cogl_material_copy                  (<em class="parameter"><code><a class="link" href="cogl-Materials.html#CoglMaterial" title="CoglMaterial"><span class="type">CoglMaterial</span></a> *source</code></em>);</pre>
<p>
Creates a new material with the configuration copied from the
source material.
</p>
<p>
We would strongly advise developers to always aim to use
<a class="link" href="cogl-Materials.html#cogl-material-copy" title="cogl_material_copy ()"><code class="function">cogl_material_copy()</code></a> instead of <a class="link" href="cogl-Materials.html#cogl-material-new" title="cogl_material_new ()"><code class="function">cogl_material_new()</code></a> whenever there will
be any similarity between two materials. Copying a material helps Cogl
keep track of a materials ancestry which we may use to help minimize GPU
state changes.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>source</code></em> :</span></p></td>
<td>a <a class="link" href="cogl-Materials.html#CoglMaterial" title="CoglMaterial"><span class="type">CoglMaterial</span></a> object to copy</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>a pointer to the newly allocated <a class="link" href="cogl-Materials.html#CoglMaterial" title="CoglMaterial"><span class="type">CoglMaterial</span></a>
</td>
</tr>
</tbody>
</table></div>
<p class="since">Since 1.2</p>
</div>
<hr>
<div class="refsect2">
<a name="cogl-is-material"></a><h3>cogl_is_material ()</h3>
<pre class="programlisting"><span class="returnvalue">gboolean</span>            cogl_is_material                    (<em class="parameter"><code><a class="link" href="cogl-General-API.html#CoglHandle" title="CoglHandle"><span class="type">CoglHandle</span></a> handle</code></em>);</pre>
<p>
Gets whether the given handle references an existing material object.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>handle</code></em> :</span></p></td>
<td>A CoglHandle</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>
<code class="literal">TRUE</code> if the handle references a <a class="link" href="cogl-Materials.html#CoglMaterial" title="CoglMaterial"><span class="type">CoglMaterial</span></a>,
<code class="literal">FALSE</code> otherwise</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="cogl-material-set-color"></a><h3>cogl_material_set_color ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>                cogl_material_set_color             (<em class="parameter"><code><a class="link" href="cogl-Materials.html#CoglMaterial" title="CoglMaterial"><span class="type">CoglMaterial</span></a> *material</code></em>,
                                                         <em class="parameter"><code>const <a class="link" href="cogl-Color-Type.html#CoglColor" title="struct CoglColor"><span class="type">CoglColor</span></a> *color</code></em>);</pre>
<p>
Sets the basic color of the material, used when no lighting is enabled.
</p>
<p>
Note that if you don't add any layers to the material then the color
will be blended unmodified with the destination; the default blend
expects premultiplied colors: for example, use (0.5, 0.0, 0.0, 0.5) for
semi-transparent red. See <a class="link" href="cogl-Color-Type.html#cogl-color-premultiply" title="cogl_color_premultiply ()"><code class="function">cogl_color_premultiply()</code></a>.
</p>
<p>
The default value is (1.0, 1.0, 1.0, 1.0)
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>material</code></em> :</span></p></td>
<td>A <a class="link" href="cogl-Materials.html#CoglMaterial" title="CoglMaterial"><span class="type">CoglMaterial</span></a> object</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>color</code></em> :</span></p></td>
<td>The components of the color</td>
</tr>
</tbody>
</table></div>
<p class="since">Since 1.0</p>
</div>
<hr>
<div class="refsect2">
<a name="cogl-material-set-color4ub"></a><h3>cogl_material_set_color4ub ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>                cogl_material_set_color4ub          (<em class="parameter"><code><a class="link" href="cogl-Materials.html#CoglMaterial" title="CoglMaterial"><span class="type">CoglMaterial</span></a> *material</code></em>,
                                                         <em class="parameter"><code><span class="type">guint8</span> red</code></em>,
                                                         <em class="parameter"><code><span class="type">guint8</span> green</code></em>,
                                                         <em class="parameter"><code><span class="type">guint8</span> blue</code></em>,
                                                         <em class="parameter"><code><span class="type">guint8</span> alpha</code></em>);</pre>
<p>
Sets the basic color of the material, used when no lighting is enabled.
</p>
<p>
The default value is (0xff, 0xff, 0xff, 0xff)
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>material</code></em> :</span></p></td>
<td>A <a class="link" href="cogl-Materials.html#CoglMaterial" title="CoglMaterial"><span class="type">CoglMaterial</span></a> object</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>red</code></em> :</span></p></td>
<td>The red component</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>green</code></em> :</span></p></td>
<td>The green component</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>blue</code></em> :</span></p></td>
<td>The blue component</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>alpha</code></em> :</span></p></td>
<td>The alpha component</td>
</tr>
</tbody>
</table></div>
<p class="since">Since 1.0</p>
</div>
<hr>
<div class="refsect2">
<a name="cogl-material-set-color4f"></a><h3>cogl_material_set_color4f ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>                cogl_material_set_color4f           (<em class="parameter"><code><a class="link" href="cogl-Materials.html#CoglMaterial" title="CoglMaterial"><span class="type">CoglMaterial</span></a> *material</code></em>,
                                                         <em class="parameter"><code><span class="type">float</span> red</code></em>,
                                                         <em class="parameter"><code><span class="type">float</span> green</code></em>,
                                                         <em class="parameter"><code><span class="type">float</span> blue</code></em>,
                                                         <em class="parameter"><code><span class="type">float</span> alpha</code></em>);</pre>
<p>
Sets the basic color of the material, used when no lighting is enabled.
</p>
<p>
The default value is (1.0, 1.0, 1.0, 1.0)
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>material</code></em> :</span></p></td>
<td>A <a class="link" href="cogl-Materials.html#CoglMaterial" title="CoglMaterial"><span class="type">CoglMaterial</span></a> object</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>red</code></em> :</span></p></td>
<td>The red component</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>green</code></em> :</span></p></td>
<td>The green component</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>blue</code></em> :</span></p></td>
<td>The blue component</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>alpha</code></em> :</span></p></td>
<td>The alpha component</td>
</tr>
</tbody>
</table></div>
<p class="since">Since 1.0</p>
</div>
<hr>
<div class="refsect2">
<a name="cogl-material-get-color"></a><h3>cogl_material_get_color ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>                cogl_material_get_color             (<em class="parameter"><code><a class="link" href="cogl-Materials.html#CoglMaterial" title="CoglMaterial"><span class="type">CoglMaterial</span></a> *material</code></em>,
                                                         <em class="parameter"><code><a class="link" href="cogl-Color-Type.html#CoglColor" title="struct CoglColor"><span class="type">CoglColor</span></a> *color</code></em>);</pre>
<p>
Retrieves the current material color.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>material</code></em> :</span></p></td>
<td>A <a class="link" href="cogl-Materials.html#CoglMaterial" title="CoglMaterial"><span class="type">CoglMaterial</span></a> object</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>color</code></em> :</span></p></td>
<td>The location to store the color. <span class="annotation">[<acronym title="Parameter for returning results. Default is transfer full."><span class="acronym">out</span></acronym>]</span>
</td>
</tr>
</tbody>
</table></div>
<p class="since">Since 1.0</p>
</div>
<hr>
<div class="refsect2">
<a name="cogl-material-set-ambient"></a><h3>cogl_material_set_ambient ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>                cogl_material_set_ambient           (<em class="parameter"><code><a class="link" href="cogl-Materials.html#CoglMaterial" title="CoglMaterial"><span class="type">CoglMaterial</span></a> *material</code></em>,
                                                         <em class="parameter"><code>const <a class="link" href="cogl-Color-Type.html#CoglColor" title="struct CoglColor"><span class="type">CoglColor</span></a> *ambient</code></em>);</pre>
<p>
Sets the material's ambient color, in the standard OpenGL lighting
model. The ambient color affects the overall color of the object.
</p>
<p>
Since the diffuse color will be intense when the light hits the surface
directly, the ambient will be most apparent where the light hits at a
slant.
</p>
<p>
The default value is (0.2, 0.2, 0.2, 1.0)
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>material</code></em> :</span></p></td>
<td>A <a class="link" href="cogl-Materials.html#CoglMaterial" title="CoglMaterial"><span class="type">CoglMaterial</span></a> object</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>ambient</code></em> :</span></p></td>
<td>The components of the desired ambient color</td>
</tr>
</tbody>
</table></div>
<p class="since">Since 1.0</p>
</div>
<hr>
<div class="refsect2">
<a name="cogl-material-get-ambient"></a><h3>cogl_material_get_ambient ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>                cogl_material_get_ambient           (<em class="parameter"><code><a class="link" href="cogl-Materials.html#CoglMaterial" title="CoglMaterial"><span class="type">CoglMaterial</span></a> *material</code></em>,
                                                         <em class="parameter"><code><a class="link" href="cogl-Color-Type.html#CoglColor" title="struct CoglColor"><span class="type">CoglColor</span></a> *ambient</code></em>);</pre>
<p>
Retrieves the current ambient color for <em class="parameter"><code>material</code></em>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>material</code></em> :</span></p></td>
<td>A <a class="link" href="cogl-Materials.html#CoglMaterial" title="CoglMaterial"><span class="type">CoglMaterial</span></a> object</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>ambient</code></em> :</span></p></td>
<td>The location to store the ambient color</td>
</tr>
</tbody>
</table></div>
<p class="since">Since 1.0</p>
</div>
<hr>
<div class="refsect2">
<a name="cogl-material-set-diffuse"></a><h3>cogl_material_set_diffuse ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>                cogl_material_set_diffuse           (<em class="parameter"><code><a class="link" href="cogl-Materials.html#CoglMaterial" title="CoglMaterial"><span class="type">CoglMaterial</span></a> *material</code></em>,
                                                         <em class="parameter"><code>const <a class="link" href="cogl-Color-Type.html#CoglColor" title="struct CoglColor"><span class="type">CoglColor</span></a> *diffuse</code></em>);</pre>
<p>
Sets the material's diffuse color, in the standard OpenGL lighting
model. The diffuse color is most intense where the light hits the
surface directly - perpendicular to the surface.
</p>
<p>
The default value is (0.8, 0.8, 0.8, 1.0)
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>material</code></em> :</span></p></td>
<td>A <a class="link" href="cogl-Materials.html#CoglMaterial" title="CoglMaterial"><span class="type">CoglMaterial</span></a> object</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>diffuse</code></em> :</span></p></td>
<td>The components of the desired diffuse color</td>
</tr>
</tbody>
</table></div>
<p class="since">Since 1.0</p>
</div>
<hr>
<div class="refsect2">
<a name="cogl-material-get-diffuse"></a><h3>cogl_material_get_diffuse ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>                cogl_material_get_diffuse           (<em class="parameter"><code><a class="link" href="cogl-Materials.html#CoglMaterial" title="CoglMaterial"><span class="type">CoglMaterial</span></a> *material</code></em>,
                                                         <em class="parameter"><code><a class="link" href="cogl-Color-Type.html#CoglColor" title="struct CoglColor"><span class="type">CoglColor</span></a> *diffuse</code></em>);</pre>
<p>
Retrieves the current diffuse color for <em class="parameter"><code>material</code></em>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>material</code></em> :</span></p></td>
<td>A <a class="link" href="cogl-Materials.html#CoglMaterial" title="CoglMaterial"><span class="type">CoglMaterial</span></a> object</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>diffuse</code></em> :</span></p></td>
<td>The location to store the diffuse color</td>
</tr>
</tbody>
</table></div>
<p class="since">Since 1.0</p>
</div>
<hr>
<div class="refsect2">
<a name="cogl-material-set-ambient-and-diffuse"></a><h3>cogl_material_set_ambient_and_diffuse ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>                cogl_material_set_ambient_and_diffuse
                                                        (<em class="parameter"><code><a class="link" href="cogl-Materials.html#CoglMaterial" title="CoglMaterial"><span class="type">CoglMaterial</span></a> *material</code></em>,
                                                         <em class="parameter"><code>const <a class="link" href="cogl-Color-Type.html#CoglColor" title="struct CoglColor"><span class="type">CoglColor</span></a> *color</code></em>);</pre>
<p>
Conveniently sets the diffuse and ambient color of <em class="parameter"><code>material</code></em> at the same
time. See <a class="link" href="cogl-Materials.html#cogl-material-set-ambient" title="cogl_material_set_ambient ()"><code class="function">cogl_material_set_ambient()</code></a> and <a class="link" href="cogl-Materials.html#cogl-material-set-diffuse" title="cogl_material_set_diffuse ()"><code class="function">cogl_material_set_diffuse()</code></a>.
</p>
<p>
The default ambient color is (0.2, 0.2, 0.2, 1.0)
</p>
<p>
The default diffuse color is (0.8, 0.8, 0.8, 1.0)
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>material</code></em> :</span></p></td>
<td>A <a class="link" href="cogl-Materials.html#CoglMaterial" title="CoglMaterial"><span class="type">CoglMaterial</span></a> object</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>color</code></em> :</span></p></td>
<td>The components of the desired ambient and diffuse colors</td>
</tr>
</tbody>
</table></div>
<p class="since">Since 1.0</p>
</div>
<hr>
<div class="refsect2">
<a name="cogl-material-set-emission"></a><h3>cogl_material_set_emission ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>                cogl_material_set_emission          (<em class="parameter"><code><a class="link" href="cogl-Materials.html#CoglMaterial" title="CoglMaterial"><span class="type">CoglMaterial</span></a> *material</code></em>,
                                                         <em class="parameter"><code>const <a class="link" href="cogl-Color-Type.html#CoglColor" title="struct CoglColor"><span class="type">CoglColor</span></a> *emission</code></em>);</pre>
<p>
Sets the material's emissive color, in the standard OpenGL lighting
model. It will look like the surface is a light source emitting this
color.
</p>
<p>
The default value is (0.0, 0.0, 0.0, 1.0)
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>material</code></em> :</span></p></td>
<td>A <a class="link" href="cogl-Materials.html#CoglMaterial" title="CoglMaterial"><span class="type">CoglMaterial</span></a> object</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>emission</code></em> :</span></p></td>
<td>The components of the desired emissive color</td>
</tr>
</tbody>
</table></div>
<p class="since">Since 1.0</p>
</div>
<hr>
<div class="refsect2">
<a name="cogl-material-get-emission"></a><h3>cogl_material_get_emission ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>                cogl_material_get_emission          (<em class="parameter"><code><a class="link" href="cogl-Materials.html#CoglMaterial" title="CoglMaterial"><span class="type">CoglMaterial</span></a> *material</code></em>,
                                                         <em class="parameter"><code><a class="link" href="cogl-Color-Type.html#CoglColor" title="struct CoglColor"><span class="type">CoglColor</span></a> *emission</code></em>);</pre>
<p>
Retrieves the materials current emission color.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>material</code></em> :</span></p></td>
<td>A <a class="link" href="cogl-Materials.html#CoglMaterial" title="CoglMaterial"><span class="type">CoglMaterial</span></a> object</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>emission</code></em> :</span></p></td>
<td>The location to store the emission color</td>
</tr>
</tbody>
</table></div>
<p class="since">Since 1.0</p>
</div>
<hr>
<div class="refsect2">
<a name="cogl-material-set-specular"></a><h3>cogl_material_set_specular ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>                cogl_material_set_specular          (<em class="parameter"><code><a class="link" href="cogl-Materials.html#CoglMaterial" title="CoglMaterial"><span class="type">CoglMaterial</span></a> *material</code></em>,
                                                         <em class="parameter"><code>const <a class="link" href="cogl-Color-Type.html#CoglColor" title="struct CoglColor"><span class="type">CoglColor</span></a> *specular</code></em>);</pre>
<p>
Sets the material's specular color, in the standard OpenGL lighting
model. The intensity of the specular color depends on the viewport
position, and is brightest along the lines of reflection.
</p>
<p>
The default value is (0.0, 0.0, 0.0, 1.0)
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>material</code></em> :</span></p></td>
<td>A <a class="link" href="cogl-Materials.html#CoglMaterial" title="CoglMaterial"><span class="type">CoglMaterial</span></a> object</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>specular</code></em> :</span></p></td>
<td>The components of the desired specular color</td>
</tr>
</tbody>
</table></div>
<p class="since">Since 1.0</p>
</div>
<hr>
<div class="refsect2">
<a name="cogl-material-get-specular"></a><h3>cogl_material_get_specular ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>                cogl_material_get_specular          (<em class="parameter"><code><a class="link" href="cogl-Materials.html#CoglMaterial" title="CoglMaterial"><span class="type">CoglMaterial</span></a> *material</code></em>,
                                                         <em class="parameter"><code><a class="link" href="cogl-Color-Type.html#CoglColor" title="struct CoglColor"><span class="type">CoglColor</span></a> *specular</code></em>);</pre>
<p>
Retrieves the materials current specular color.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>material</code></em> :</span></p></td>
<td>A <a class="link" href="cogl-Materials.html#CoglMaterial" title="CoglMaterial"><span class="type">CoglMaterial</span></a> object</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>specular</code></em> :</span></p></td>
<td>The location to store the specular color</td>
</tr>
</tbody>
</table></div>
<p class="since">Since 1.0</p>
</div>
<hr>
<div class="refsect2">
<a name="cogl-material-set-shininess"></a><h3>cogl_material_set_shininess ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>                cogl_material_set_shininess         (<em class="parameter"><code><a class="link" href="cogl-Materials.html#CoglMaterial" title="CoglMaterial"><span class="type">CoglMaterial</span></a> *material</code></em>,
                                                         <em class="parameter"><code><span class="type">float</span> shininess</code></em>);</pre>
<p>
Sets the shininess of the material, in the standard OpenGL lighting
model, which determines the size of the specular highlights. A
higher <em class="parameter"><code>shininess</code></em> will produce smaller highlights which makes the
object appear more shiny.
</p>
<p>
The default value is 0.0
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>material</code></em> :</span></p></td>
<td>A <a class="link" href="cogl-Materials.html#CoglMaterial" title="CoglMaterial"><span class="type">CoglMaterial</span></a> object</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>shininess</code></em> :</span></p></td>
<td>The desired shininess; must be &gt;= 0.0</td>
</tr>
</tbody>
</table></div>
<p class="since">Since 1.0</p>
</div>
<hr>
<div class="refsect2">
<a name="cogl-material-get-shininess"></a><h3>cogl_material_get_shininess ()</h3>
<pre class="programlisting"><span class="returnvalue">float</span>               cogl_material_get_shininess         (<em class="parameter"><code><a class="link" href="cogl-Materials.html#CoglMaterial" title="CoglMaterial"><span class="type">CoglMaterial</span></a> *material</code></em>);</pre>
<p>
Retrieves the materials current emission color.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>material</code></em> :</span></p></td>
<td>A <a class="link" href="cogl-Materials.html#CoglMaterial" title="CoglMaterial"><span class="type">CoglMaterial</span></a> object</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>The materials current shininess value</td>
</tr>
</tbody>
</table></div>
<p class="since">Since 1.0</p>
</div>
<hr>
<div class="refsect2">
<a name="CoglMaterialAlphaFunc"></a><h3>enum CoglMaterialAlphaFunc</h3>
<pre class="programlisting">typedef enum {
  COGL_MATERIAL_ALPHA_FUNC_NEVER    = 0x0200,
  COGL_MATERIAL_ALPHA_FUNC_LESS	    = 0x0201,
  COGL_MATERIAL_ALPHA_FUNC_EQUAL    = 0x0202,
  COGL_MATERIAL_ALPHA_FUNC_LEQUAL   = 0x0203,
  COGL_MATERIAL_ALPHA_FUNC_GREATER  = 0x0204,
  COGL_MATERIAL_ALPHA_FUNC_NOTEQUAL = 0x0205,
  COGL_MATERIAL_ALPHA_FUNC_GEQUAL   = 0x0206,
  COGL_MATERIAL_ALPHA_FUNC_ALWAYS   = 0x0207
} CoglMaterialAlphaFunc;
</pre>
<p>
Alpha testing happens before blending primitives with the framebuffer and
gives an opportunity to discard fragments based on a comparison with the
incoming alpha value and a reference alpha value. The <a class="link" href="cogl-Materials.html#CoglMaterialAlphaFunc" title="enum CoglMaterialAlphaFunc"><span class="type">CoglMaterialAlphaFunc</span></a>
determines how the comparison is done.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><a name="COGL-MATERIAL-ALPHA-FUNC-NEVER:CAPS"></a><span class="term"><code class="literal">COGL_MATERIAL_ALPHA_FUNC_NEVER</code></span></p></td>
<td>Never let the fragment through.
</td>
</tr>
<tr>
<td><p><a name="COGL-MATERIAL-ALPHA-FUNC-LESS:CAPS"></a><span class="term"><code class="literal">COGL_MATERIAL_ALPHA_FUNC_LESS</code></span></p></td>
<td>Let the fragment through if the incoming
  alpha value is less than the reference alpha value
</td>
</tr>
<tr>
<td><p><a name="COGL-MATERIAL-ALPHA-FUNC-EQUAL:CAPS"></a><span class="term"><code class="literal">COGL_MATERIAL_ALPHA_FUNC_EQUAL</code></span></p></td>
<td>Let the fragment through if the incoming
  alpha value equals the reference alpha value
</td>
</tr>
<tr>
<td><p><a name="COGL-MATERIAL-ALPHA-FUNC-LEQUAL:CAPS"></a><span class="term"><code class="literal">COGL_MATERIAL_ALPHA_FUNC_LEQUAL</code></span></p></td>
<td>Let the fragment through if the incoming
  alpha value is less than or equal to the reference alpha value
</td>
</tr>
<tr>
<td><p><a name="COGL-MATERIAL-ALPHA-FUNC-GREATER:CAPS"></a><span class="term"><code class="literal">COGL_MATERIAL_ALPHA_FUNC_GREATER</code></span></p></td>
<td>Let the fragment through if the incoming
  alpha value is greater than the reference alpha value
</td>
</tr>
<tr>
<td><p><a name="COGL-MATERIAL-ALPHA-FUNC-NOTEQUAL:CAPS"></a><span class="term"><code class="literal">COGL_MATERIAL_ALPHA_FUNC_NOTEQUAL</code></span></p></td>
<td>Let the fragment through if the incoming
  alpha value does not equal the reference alpha value
</td>
</tr>
<tr>
<td><p><a name="COGL-MATERIAL-ALPHA-FUNC-GEQUAL:CAPS"></a><span class="term"><code class="literal">COGL_MATERIAL_ALPHA_FUNC_GEQUAL</code></span></p></td>
<td>Let the fragment through if the incoming
  alpha value is greater than or equal to the reference alpha value.
</td>
</tr>
<tr>
<td><p><a name="COGL-MATERIAL-ALPHA-FUNC-ALWAYS:CAPS"></a><span class="term"><code class="literal">COGL_MATERIAL_ALPHA_FUNC_ALWAYS</code></span></p></td>
<td>Always let the fragment through.
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="cogl-material-set-alpha-test-function"></a><h3>cogl_material_set_alpha_test_function ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>                cogl_material_set_alpha_test_function
                                                        (<em class="parameter"><code><a class="link" href="cogl-Materials.html#CoglMaterial" title="CoglMaterial"><span class="type">CoglMaterial</span></a> *material</code></em>,
                                                         <em class="parameter"><code><a class="link" href="cogl-Materials.html#CoglMaterialAlphaFunc" title="enum CoglMaterialAlphaFunc"><span class="type">CoglMaterialAlphaFunc</span></a> alpha_func</code></em>,
                                                         <em class="parameter"><code><span class="type">float</span> alpha_reference</code></em>);</pre>
<p>
Before a primitive is blended with the framebuffer, it goes through an
alpha test stage which lets you discard fragments based on the current
alpha value. This function lets you change the function used to evaluate
the alpha channel, and thus determine which fragments are discarded
and which continue on to the blending stage.
</p>
<p>
The default is <a class="link" href="cogl-Materials.html#COGL-MATERIAL-ALPHA-FUNC-ALWAYS:CAPS"><code class="literal">COGL_MATERIAL_ALPHA_FUNC_ALWAYS</code></a>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>material</code></em> :</span></p></td>
<td>A <a class="link" href="cogl-Materials.html#CoglMaterial" title="CoglMaterial"><span class="type">CoglMaterial</span></a> object</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>alpha_func</code></em> :</span></p></td>
<td>A <em class="parameter"><code>CoglMaterialAlphaFunc</code></em> constant</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>alpha_reference</code></em> :</span></p></td>
<td>A reference point that the chosen alpha function uses
to compare incoming fragments to.</td>
</tr>
</tbody>
</table></div>
<p class="since">Since 1.0</p>
</div>
<hr>
<div class="refsect2">
<a name="COGL-BLEND-STRING-ERROR:CAPS"></a><h3>COGL_BLEND_STRING_ERROR</h3>
<pre class="programlisting">#define COGL_BLEND_STRING_ERROR (cogl_blend_string_error_quark ())
</pre>
<p>
<span class="type">GError</span> domain for blend string parser errors
</p>
<p class="since">Since 1.0</p>
</div>
<hr>
<div class="refsect2">
<a name="CoglBlendStringError"></a><h3>enum CoglBlendStringError</h3>
<pre class="programlisting">typedef enum {
 /*&lt; prefix=COGL_BLEND_STRING_ERROR &gt;*/
  COGL_BLEND_STRING_ERROR_PARSE_ERROR,
  COGL_BLEND_STRING_ERROR_ARGUMENT_PARSE_ERROR,
  COGL_BLEND_STRING_ERROR_INVALID_ERROR,
  COGL_BLEND_STRING_ERROR_GPU_UNSUPPORTED_ERROR
} CoglBlendStringError;
</pre>
<p>
Error enumeration for the blend strings parser
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><a name="COGL-BLEND-STRING-ERROR-PARSE-ERROR:CAPS"></a><span class="term"><code class="literal">COGL_BLEND_STRING_ERROR_PARSE_ERROR</code></span></p></td>
<td>Generic parse error
</td>
</tr>
<tr>
<td><p><a name="COGL-BLEND-STRING-ERROR-ARGUMENT-PARSE-ERROR:CAPS"></a><span class="term"><code class="literal">COGL_BLEND_STRING_ERROR_ARGUMENT_PARSE_ERROR</code></span></p></td>
<td>Argument parse error
</td>
</tr>
<tr>
<td><p><a name="COGL-BLEND-STRING-ERROR-INVALID-ERROR:CAPS"></a><span class="term"><code class="literal">COGL_BLEND_STRING_ERROR_INVALID_ERROR</code></span></p></td>
<td>Internal parser error
</td>
</tr>
<tr>
<td><p><a name="COGL-BLEND-STRING-ERROR-GPU-UNSUPPORTED-ERROR:CAPS"></a><span class="term"><code class="literal">COGL_BLEND_STRING_ERROR_GPU_UNSUPPORTED_ERROR</code></span></p></td>
<td>Blend string not
  supported by the GPU
</td>
</tr>
</tbody>
</table></div>
<p class="since">Since 1.0</p>
</div>
<hr>
<div class="refsect2">
<a name="cogl-material-set-blend"></a><h3>cogl_material_set_blend ()</h3>
<pre class="programlisting"><span class="returnvalue">gboolean</span>            cogl_material_set_blend             (<em class="parameter"><code><a class="link" href="cogl-Materials.html#CoglMaterial" title="CoglMaterial"><span class="type">CoglMaterial</span></a> *material</code></em>,
                                                         <em class="parameter"><code>const <span class="type">char</span> *blend_string</code></em>,
                                                         <em class="parameter"><code><span class="type">GError</span> **error</code></em>);</pre>
<p>
If not already familiar; please refer <a class="link" href="cogl-Blend-Strings.html" title="Material Blend Strings">here</a>
for an overview of what blend strings are, and their syntax.
</p>
<p>
Blending occurs after the alpha test function, and combines fragments with
the framebuffer.
</p>
<p>
Currently the only blend function Cogl exposes is <code class="function">ADD()</code>. So any valid
blend statements will be of the form:
</p>
<p>
</p>
<div class="informalexample">
  <table class="listing_frame" border="0" cellpadding="0" cellspacing="0">
    <tbody>
      <tr>
        <td class="listing_lines" align="right"><pre>1</pre></td>
        <td class="listing_code"><pre class="programlisting"><span class="gtkdoc opt">&lt;</span>channel<span class="gtkdoc opt">-</span>mask<span class="gtkdoc opt">&gt;=</span><span class="function">ADD</span><span class="gtkdoc opt">(</span>SRC_COLOR<span class="gtkdoc opt">*(&lt;</span>factor<span class="gtkdoc opt">&gt;),</span> DST_COLOR<span class="gtkdoc opt">*(&lt;</span>factor<span class="gtkdoc opt">&gt;))</span></pre></td>
      </tr>
    </tbody>
  </table>
</div>

<p>
</p>
<p>
</p>
<div class="warning" style="margin-left: 0.5in; margin-right: 0.5in;">
<h3 class="title">Warning</h3>The brackets around blend factors are currently not
optional!</div>
<p>
</p>
<p>
This is the list of source-names usable as blend factors:
</p>
<div class="itemizedlist"><ul class="itemizedlist" type="disc">
<li class="listitem"><p>SRC_COLOR: The color of the in comming fragment</p></li>
<li class="listitem"><p>DST_COLOR: The color of the framebuffer</p></li>
<li class="listitem"><p>CONSTANT: The constant set via <a class="link" href="cogl-Materials.html#cogl-material-set-blend-constant" title="cogl_material_set_blend_constant ()"><code class="function">cogl_material_set_blend_constant()</code></a></p></li>
</ul></div>
<p>
</p>
<p>
The source names can be used according to the
<a class="link" href="cogl-Blend-Strings.html#cogl-Blend-String-syntax" title="Here's the syntax">color-source and factor syntax</a>,
so for example "(1-SRC_COLOR[A])" would be a valid factor, as would
"(CONSTANT[RGB])"
</p>
<p>
These can also be used as factors:
</p>
<div class="itemizedlist"><ul class="itemizedlist" type="disc">
<li class="listitem">0: (0, 0, 0, 0)</li>
<li class="listitem">1: (1, 1, 1, 1)</li>
<li class="listitem">SRC_ALPHA_SATURATE_FACTOR: (f,f,f,1) where f = MIN(SRC_COLOR[A],1-DST_COLOR[A])</li>
</ul></div>
<p>
</p>
<p>
</p>
<div class="note" style="margin-left: 0.5in; margin-right: 0.5in;">
<h3 class="title">Note</h3>Remember; all color components are normalized to the range [0, 1]
before computing the result of blending.</div>
<p>
</p>
<p>
</p>
<div class="example">
<a name="cogl-Blend-Strings-blend-unpremul"></a><p class="title"><b>Example 1. Blend Strings/1</b></p>
<div class="example-contents">
<p>Blend a non-premultiplied source over a destination with
  premultiplied alpha:</p>
<pre class="programlisting">
"RGB = ADD(SRC_COLOR*(SRC_COLOR[A]), DST_COLOR*(1-SRC_COLOR[A]))"
"A   = ADD(SRC_COLOR, DST_COLOR*(1-SRC_COLOR[A]))"
  </pre>
</div>
</div>
<p><br class="example-break">
</p>
<p>
</p>
<div class="example">
<a name="cogl-Blend-Strings-blend-premul"></a><p class="title"><b>Example 2. Blend Strings/2</b></p>
<div class="example-contents">
<p>Blend a premultiplied source over a destination with
  premultiplied alpha</p>
<pre class="programlisting">
"RGBA = ADD(SRC_COLOR, DST_COLOR*(1-SRC_COLOR[A]))"
  </pre>
</div>
</div>
<p><br class="example-break">
</p>
<p>
The default blend string is:
</p>
<div class="informalexample">
  <table class="listing_frame" border="0" cellpadding="0" cellspacing="0">
    <tbody>
      <tr>
        <td class="listing_lines" align="right"><pre>1</pre></td>
        <td class="listing_code"><pre class="programlisting">RGBA <span class="gtkdoc opt">=</span> <span class="function">ADD</span> <span class="gtkdoc opt">(</span>SRC_COLOR<span class="gtkdoc opt">,</span> DST_COLOR<span class="gtkdoc opt">*(</span><span class="number">1</span><span class="gtkdoc opt">-</span>SRC_COLOR<span class="gtkdoc opt">[</span>A<span class="gtkdoc opt">]))</span></pre></td>
      </tr>
    </tbody>
  </table>
</div>

<p>
</p>
<p>
That gives normal alpha-blending when the calculated color for the material
is in premultiplied form.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>material</code></em> :</span></p></td>
<td>A <a class="link" href="cogl-Materials.html#CoglMaterial" title="CoglMaterial"><span class="type">CoglMaterial</span></a> object</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>blend_string</code></em> :</span></p></td>
<td>A <a class="link" href="cogl-Blend-Strings.html" title="Material Blend Strings">Cogl blend string</a>
describing the desired blend function.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>error</code></em> :</span></p></td>
<td>return location for a <span class="type">GError</span> that may report lack of driver
support if you give separate blend string statements for the alpha
channel and RGB channels since some drivers, or backends such as
GLES 1.1, don't support this feature. May be <code class="literal">NULL</code>, in which case a
warning will be printed out using GLib's logging facilities if an
error is encountered.</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>
<code class="literal">TRUE</code> if the blend string was successfully parsed, and the
described blending is supported by the underlying driver/hardware. If
there was an error, <code class="literal">FALSE</code> is returned and <em class="parameter"><code>error</code></em> is set accordingly (if
present).</td>
</tr>
</tbody>
</table></div>
<p class="since">Since 1.0</p>
</div>
<hr>
<div class="refsect2">
<a name="cogl-material-set-blend-constant"></a><h3>cogl_material_set_blend_constant ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>                cogl_material_set_blend_constant    (<em class="parameter"><code><a class="link" href="cogl-Materials.html#CoglMaterial" title="CoglMaterial"><span class="type">CoglMaterial</span></a> *material</code></em>,
                                                         <em class="parameter"><code>const <a class="link" href="cogl-Color-Type.html#CoglColor" title="struct CoglColor"><span class="type">CoglColor</span></a> *constant_color</code></em>);</pre>
<p>
When blending is setup to reference a CONSTANT blend factor then
blending will depend on the constant set with this function.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>material</code></em> :</span></p></td>
<td>A <a class="link" href="cogl-Materials.html#CoglMaterial" title="CoglMaterial"><span class="type">CoglMaterial</span></a> object</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>constant_color</code></em> :</span></p></td>
<td>The constant color you want</td>
</tr>
</tbody>
</table></div>
<p class="since">Since 1.0</p>
</div>
<hr>
<div class="refsect2">
<a name="cogl-material-set-point-size"></a><h3>cogl_material_set_point_size ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>                cogl_material_set_point_size        (<em class="parameter"><code><a class="link" href="cogl-Materials.html#CoglMaterial" title="CoglMaterial"><span class="type">CoglMaterial</span></a> *material</code></em>,
                                                         <em class="parameter"><code><span class="type">float</span> point_size</code></em>);</pre>
<p>
Changes the size of points drawn when <a class="link" href="cogl-Vertex-Buffers.html#COGL-VERTICES-MODE-POINTS:CAPS"><code class="literal">COGL_VERTICES_MODE_POINTS</code></a> is
used with the vertex buffer API. Note that typically the GPU will
only support a limited minimum and maximum range of point sizes. If
the chosen point size is outside that range then the nearest value
within that range will be used instead. The size of a point is in
screen space so it will be the same regardless of any
transformations. The default point size is 1.0.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>material</code></em> :</span></p></td>
<td>a material.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>point_size</code></em> :</span></p></td>
<td>the new point size.</td>
</tr>
</tbody>
</table></div>
<p class="since">Since 1.4</p>
</div>
<hr>
<div class="refsect2">
<a name="cogl-material-get-point-size"></a><h3>cogl_material_get_point_size ()</h3>
<pre class="programlisting"><span class="returnvalue">float</span>               cogl_material_get_point_size        (<em class="parameter"><code><a class="link" href="cogl-Materials.html#CoglMaterial" title="CoglMaterial"><span class="type">CoglMaterial</span></a> *material</code></em>);</pre>
<p>
Get the size of points drawn when <a class="link" href="cogl-Vertex-Buffers.html#COGL-VERTICES-MODE-POINTS:CAPS"><code class="literal">COGL_VERTICES_MODE_POINTS</code></a> is
used with the vertex buffer API.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>material</code></em> :</span></p></td>
<td>a <a class="link" href="cogl-General-API.html#CoglHandle" title="CoglHandle"><span class="type">CoglHandle</span></a> to a material.</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>the point size of the material.</td>
</tr>
</tbody>
</table></div>
<p class="since">Since 1.4</p>
</div>
<hr>
<div class="refsect2">
<a name="cogl-material-set-layer"></a><h3>cogl_material_set_layer ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>                cogl_material_set_layer             (<em class="parameter"><code><a class="link" href="cogl-Materials.html#CoglMaterial" title="CoglMaterial"><span class="type">CoglMaterial</span></a> *material</code></em>,
                                                         <em class="parameter"><code><span class="type">int</span> layer_index</code></em>,
                                                         <em class="parameter"><code><a class="link" href="cogl-General-API.html#CoglHandle" title="CoglHandle"><span class="type">CoglHandle</span></a> texture</code></em>);</pre>
<p>
In addition to the standard OpenGL lighting model a Cogl material may have
one or more layers comprised of textures that can be blended together in
order, with a number of different texture combine modes. This function
defines a new texture layer.
</p>
<p>
The index values of multiple layers do not have to be consecutive; it is
only their relative order that is important.
</p>
<p>
</p>
<div class="note" style="margin-left: 0.5in; margin-right: 0.5in;">
<h3 class="title">Note</h3>In the future, we may define other types of material layers, such
as purely GLSL based layers.</div>
<p>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>material</code></em> :</span></p></td>
<td>A <a class="link" href="cogl-Materials.html#CoglMaterial" title="CoglMaterial"><span class="type">CoglMaterial</span></a> object</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>layer_index</code></em> :</span></p></td>
<td>the index of the layer</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>texture</code></em> :</span></p></td>
<td>a <a class="link" href="cogl-General-API.html#CoglHandle" title="CoglHandle"><span class="type">CoglHandle</span></a> for the layer object</td>
</tr>
</tbody>
</table></div>
<p class="since">Since 1.0</p>
</div>
<hr>
<div class="refsect2">
<a name="cogl-material-remove-layer"></a><h3>cogl_material_remove_layer ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>                cogl_material_remove_layer          (<em class="parameter"><code><a class="link" href="cogl-Materials.html#CoglMaterial" title="CoglMaterial"><span class="type">CoglMaterial</span></a> *material</code></em>,
                                                         <em class="parameter"><code><span class="type">int</span> layer_index</code></em>);</pre>
<p>
This function removes a layer from your material
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>material</code></em> :</span></p></td>
<td>A <a class="link" href="cogl-Materials.html#CoglMaterial" title="CoglMaterial"><span class="type">CoglMaterial</span></a> object</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>layer_index</code></em> :</span></p></td>
<td>Specifies the layer you want to remove</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="cogl-material-set-layer-combine"></a><h3>cogl_material_set_layer_combine ()</h3>
<pre class="programlisting"><span class="returnvalue">gboolean</span>            cogl_material_set_layer_combine     (<em class="parameter"><code><a class="link" href="cogl-Materials.html#CoglMaterial" title="CoglMaterial"><span class="type">CoglMaterial</span></a> *material</code></em>,
                                                         <em class="parameter"><code><span class="type">int</span> layer_index</code></em>,
                                                         <em class="parameter"><code>const <span class="type">char</span> *blend_string</code></em>,
                                                         <em class="parameter"><code><span class="type">GError</span> **error</code></em>);</pre>
<p>
If not already familiar; you can refer
<a class="link" href="cogl-Blend-Strings.html" title="Material Blend Strings">here</a> for an overview of what blend
strings are and there syntax.
</p>
<p>
These are all the functions available for texture combining:
</p>
<div class="itemizedlist"><ul class="itemizedlist" type="disc">
<li class="listitem">REPLACE(arg0) = arg0</li>
<li class="listitem">MODULATE(arg0, arg1) = arg0 x arg1</li>
<li class="listitem">ADD(arg0, arg1) = arg0 + arg1</li>
<li class="listitem">ADD_SIGNED(arg0, arg1) = arg0 + arg1 - 0.5</li>
<li class="listitem">INTERPOLATE(arg0, arg1, arg2) = arg0 x arg2 + arg1 x (1 - arg2)</li>
<li class="listitem">SUBTRACT(arg0, arg1) = arg0 - arg1</li>
<li class="listitem"><pre class="programlisting">
 DOT3_RGB(arg0, arg1) = 4 x ((arg0[R] - 0.5)) * (arg1[R] - 0.5) +
                             (arg0[G] - 0.5)) * (arg1[G] - 0.5) +
                             (arg0[B] - 0.5)) * (arg1[B] - 0.5))
    </pre></li>
<li class="listitem"><pre class="programlisting">
 DOT3_RGBA(arg0, arg1) = 4 x ((arg0[R] - 0.5)) * (arg1[R] - 0.5) +
                              (arg0[G] - 0.5)) * (arg1[G] - 0.5) +
                              (arg0[B] - 0.5)) * (arg1[B] - 0.5))
    </pre></li>
</ul></div>
<p>
</p>
<p>
Refer to the
<a class="link" href="cogl-Blend-Strings.html#cogl-Blend-String-syntax" title="Here's the syntax">color-source syntax</a> for
describing the arguments. The valid source names for texture combining
are:
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term">TEXTURE</span></p></td>
<td>Use the color from the current texture layer</td>
</tr>
<tr>
<td><p><span class="term">TEXTURE_0, TEXTURE_1, etc</span></p></td>
<td>Use the color from the specified texture layer</td>
</tr>
<tr>
<td><p><span class="term">CONSTANT</span></p></td>
<td>Use the color from the constant given with
    <code class="function">cogl_material_set_layer_constant()</code>
</td>
</tr>
<tr>
<td><p><span class="term">PRIMARY</span></p></td>
<td>Use the color of the material as set with
    <a class="link" href="cogl-Materials.html#cogl-material-set-color" title="cogl_material_set_color ()"><code class="function">cogl_material_set_color()</code></a>
</td>
</tr>
<tr>
<td><p><span class="term">PREVIOUS</span></p></td>
<td>Either use the texture color from the previous layer, or
    if this is layer 0, use the color of the material as set with
    <a class="link" href="cogl-Materials.html#cogl-material-set-color" title="cogl_material_set_color ()"><code class="function">cogl_material_set_color()</code></a>
</td>
</tr>
</tbody>
</table></div>
<p>
</p>
<p>
</p>
<div class="refsect2">
<a name="cogl-Layer-Combine-Examples"></a><h3>Layer Combine Examples</h3>
<p>This is effectively what the default blending is:</p>
<div class="informalexample">
  <table class="listing_frame" border="0" cellpadding="0" cellspacing="0">
    <tbody>
      <tr>
        <td class="listing_lines" align="right"><pre>1</pre></td>
        <td class="listing_code"><pre class="programlisting">RGBA <span class="gtkdoc opt">=</span> <span class="function">MODULATE</span> <span class="gtkdoc opt">(</span>PREVIOUS<span class="gtkdoc opt">,</span> TEXTURE<span class="gtkdoc opt">)</span></pre></td>
      </tr>
    </tbody>
  </table>
</div>

<p>This could be used to cross-fade between two images, using
  the alpha component of a constant as the interpolator. The constant
  color is given by calling cogl_material_set_layer_constant.</p>
<div class="informalexample">
  <table class="listing_frame" border="0" cellpadding="0" cellspacing="0">
    <tbody>
      <tr>
        <td class="listing_lines" align="right"><pre>1</pre></td>
        <td class="listing_code"><pre class="programlisting">RGBA <span class="gtkdoc opt">=</span> <span class="function">INTERPOLATE</span> <span class="gtkdoc opt">(</span>PREVIOUS<span class="gtkdoc opt">,</span> TEXTURE<span class="gtkdoc opt">,</span> CONSTANT<span class="gtkdoc opt">[</span>A<span class="gtkdoc opt">])</span></pre></td>
      </tr>
    </tbody>
  </table>
</div>

</div>
<p>
</p>
<p>
</p>
<div class="note" style="margin-left: 0.5in; margin-right: 0.5in;">
<h3 class="title">Note</h3>You can't give a multiplication factor for arguments as you can
with blending.</div>
<p>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>material</code></em> :</span></p></td>
<td>A <a class="link" href="cogl-Materials.html#CoglMaterial" title="CoglMaterial"><span class="type">CoglMaterial</span></a> object</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>layer_index</code></em> :</span></p></td>
<td>Specifies the layer you want define a combine function for</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>blend_string</code></em> :</span></p></td>
<td>A <a class="link" href="cogl-Blend-Strings.html" title="Material Blend Strings">Cogl blend string</a>
describing the desired texture combine function.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>error</code></em> :</span></p></td>
<td>A <span class="type">GError</span> that may report parse errors or lack of GPU/driver
support. May be <code class="literal">NULL</code>, in which case a warning will be printed out if an
error is encountered.</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>
<code class="literal">TRUE</code> if the blend string was successfully parsed, and the
described texture combining is supported by the underlying driver and
or hardware. On failure, <code class="literal">FALSE</code> is returned and <em class="parameter"><code>error</code></em> is set</td>
</tr>
</tbody>
</table></div>
<p class="since">Since 1.0</p>
</div>
<hr>
<div class="refsect2">
<a name="cogl-material-set-layer-combine-constant"></a><h3>cogl_material_set_layer_combine_constant ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>                cogl_material_set_layer_combine_constant
                                                        (<em class="parameter"><code><a class="link" href="cogl-Materials.html#CoglMaterial" title="CoglMaterial"><span class="type">CoglMaterial</span></a> *material</code></em>,
                                                         <em class="parameter"><code><span class="type">int</span> layer_index</code></em>,
                                                         <em class="parameter"><code>const <a class="link" href="cogl-Color-Type.html#CoglColor" title="struct CoglColor"><span class="type">CoglColor</span></a> *constant</code></em>);</pre>
<p>
When you are using the 'CONSTANT' color source in a layer combine
description then you can use this function to define its value.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>material</code></em> :</span></p></td>
<td>A <a class="link" href="cogl-Materials.html#CoglMaterial" title="CoglMaterial"><span class="type">CoglMaterial</span></a> object</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>layer_index</code></em> :</span></p></td>
<td>Specifies the layer you want to specify a constant used
for texture combining</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>constant</code></em> :</span></p></td>
<td>The constant color you want</td>
</tr>
</tbody>
</table></div>
<p class="since">Since 1.0</p>
</div>
<hr>
<div class="refsect2">
<a name="cogl-material-set-layer-matrix"></a><h3>cogl_material_set_layer_matrix ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>                cogl_material_set_layer_matrix      (<em class="parameter"><code><a class="link" href="cogl-Materials.html#CoglMaterial" title="CoglMaterial"><span class="type">CoglMaterial</span></a> *material</code></em>,
                                                         <em class="parameter"><code><span class="type">int</span> layer_index</code></em>,
                                                         <em class="parameter"><code>const <a class="link" href="cogl-Matrices.html#CoglMatrix" title="CoglMatrix"><span class="type">CoglMatrix</span></a> *matrix</code></em>);</pre>
<p>
This function lets you set a matrix that can be used to e.g. translate
and rotate a single layer of a material used to fill your geometry.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>material</code></em> :</span></p></td>
<td>A <a class="link" href="cogl-Materials.html#CoglMaterial" title="CoglMaterial"><span class="type">CoglMaterial</span></a> object</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>layer_index</code></em> :</span></p></td>
<td>the index for the layer inside <em class="parameter"><code>material</code></em>
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>matrix</code></em> :</span></p></td>
<td>the transformation matrix for the layer</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="cogl-material-set-layer-point-sprite-coords-enabled"></a><h3>cogl_material_set_layer_point_sprite_coords_enabled ()</h3>
<pre class="programlisting"><span class="returnvalue">gboolean</span>            cogl_material_set_layer_point_sprite_coords_enabled
                                                        (<em class="parameter"><code><a class="link" href="cogl-Materials.html#CoglMaterial" title="CoglMaterial"><span class="type">CoglMaterial</span></a> *material</code></em>,
                                                         <em class="parameter"><code><span class="type">int</span> layer_index</code></em>,
                                                         <em class="parameter"><code><span class="type">gboolean</span> enable</code></em>,
                                                         <em class="parameter"><code><span class="type">GError</span> **error</code></em>);</pre>
<p>
When rendering points, if <em class="parameter"><code>enable</code></em> is <code class="literal">TRUE</code> then the texture
coordinates for this layer will be replaced with coordinates that
vary from 0.0 to 1.0 across the primitive. The top left of the
point will have the coordinates 0.0,0.0 and the bottom right will
have 1.0,1.0. If <em class="parameter"><code>enable</code></em> is <code class="literal">FALSE</code> then the coordinates will be
fixed for the entire point.
</p>
<p>
This function will only work if <a class="link" href="cogl-General-API.html#COGL-FEATURE-POINT-SPRITE:CAPS"><code class="literal">COGL_FEATURE_POINT_SPRITE</code></a> is
available. If the feature is not available then the function will
return <code class="literal">FALSE</code> and set <em class="parameter"><code>error</code></em>.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>material</code></em> :</span></p></td>
<td>a <a class="link" href="cogl-General-API.html#CoglHandle" title="CoglHandle"><span class="type">CoglHandle</span></a> to a material.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>layer_index</code></em> :</span></p></td>
<td>the layer number to change.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>enable</code></em> :</span></p></td>
<td>whether to enable point sprite coord generation.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>error</code></em> :</span></p></td>
<td>A return location for a GError, or NULL to ignore errors.</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>
<code class="literal">TRUE</code> if the function succeeds, <code class="literal">FALSE</code> otherwise.</td>
</tr>
</tbody>
</table></div>
<p class="since">Since 1.4</p>
</div>
<hr>
<div class="refsect2">
<a name="cogl-material-get-layer-point-sprite-coords-enabled"></a><h3>cogl_material_get_layer_point_sprite_coords_enabled ()</h3>
<pre class="programlisting"><span class="returnvalue">gboolean</span>            cogl_material_get_layer_point_sprite_coords_enabled
                                                        (<em class="parameter"><code><a class="link" href="cogl-Materials.html#CoglMaterial" title="CoglMaterial"><span class="type">CoglMaterial</span></a> *material</code></em>,
                                                         <em class="parameter"><code><span class="type">int</span> layer_index</code></em>);</pre>
<p>
Gets whether point sprite coordinate generation is enabled for this
texture layer.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>material</code></em> :</span></p></td>
<td>a <a class="link" href="cogl-General-API.html#CoglHandle" title="CoglHandle"><span class="type">CoglHandle</span></a> to a material.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>layer_index</code></em> :</span></p></td>
<td>the layer number to check.</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>whether the texture coordinates will be replaced with
point sprite coordinates.</td>
</tr>
</tbody>
</table></div>
<p class="since">Since 1.4</p>
</div>
<hr>
<div class="refsect2">
<a name="cogl-material-get-n-layers"></a><h3>cogl_material_get_n_layers ()</h3>
<pre class="programlisting"><span class="returnvalue">int</span>                 cogl_material_get_n_layers          (<em class="parameter"><code><a class="link" href="cogl-Materials.html#CoglMaterial" title="CoglMaterial"><span class="type">CoglMaterial</span></a> *material</code></em>);</pre>
<p>
Retrieves the number of layers defined for the given <em class="parameter"><code>material</code></em>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>material</code></em> :</span></p></td>
<td>A <a class="link" href="cogl-Materials.html#CoglMaterial" title="CoglMaterial"><span class="type">CoglMaterial</span></a> object</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>the number of layers</td>
</tr>
</tbody>
</table></div>
<p class="since">Since 1.0</p>
</div>
<hr>
<div class="refsect2">
<a name="CoglMaterialFilter"></a><h3>enum CoglMaterialFilter</h3>
<pre class="programlisting">typedef enum {
  COGL_MATERIAL_FILTER_NEAREST = 0x2600,
  COGL_MATERIAL_FILTER_LINEAR = 0x2601,
  COGL_MATERIAL_FILTER_NEAREST_MIPMAP_NEAREST = 0x2700,
  COGL_MATERIAL_FILTER_LINEAR_MIPMAP_NEAREST = 0x2701,
  COGL_MATERIAL_FILTER_NEAREST_MIPMAP_LINEAR = 0x2702,
  COGL_MATERIAL_FILTER_LINEAR_MIPMAP_LINEAR = 0x2703
} CoglMaterialFilter;
</pre>
<p>
Texture filtering is used whenever the current pixel maps either to more
than one texture element (texel) or less than one. These filter enums
correspond to different strategies used to come up with a pixel color, by
possibly referring to multiple neighbouring texels and taking a weighted
average or simply using the nearest texel.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><a name="COGL-MATERIAL-FILTER-NEAREST:CAPS"></a><span class="term"><code class="literal">COGL_MATERIAL_FILTER_NEAREST</code></span></p></td>
<td>Measuring in manhatten distance from the,
  current pixel center, use the nearest texture texel
</td>
</tr>
<tr>
<td><p><a name="COGL-MATERIAL-FILTER-LINEAR:CAPS"></a><span class="term"><code class="literal">COGL_MATERIAL_FILTER_LINEAR</code></span></p></td>
<td>Use the weighted average of the 4 texels
  nearest the current pixel center
</td>
</tr>
<tr>
<td><p><a name="COGL-MATERIAL-FILTER-NEAREST-MIPMAP-NEAREST:CAPS"></a><span class="term"><code class="literal">COGL_MATERIAL_FILTER_NEAREST_MIPMAP_NEAREST</code></span></p></td>
<td>Select the mimap level whose
  texel size most closely matches the current pixel, and use the
  <a class="link" href="cogl-Materials.html#COGL-MATERIAL-FILTER-NEAREST:CAPS"><code class="literal">COGL_MATERIAL_FILTER_NEAREST</code></a> criterion
</td>
</tr>
<tr>
<td><p><a name="COGL-MATERIAL-FILTER-LINEAR-MIPMAP-NEAREST:CAPS"></a><span class="term"><code class="literal">COGL_MATERIAL_FILTER_LINEAR_MIPMAP_NEAREST</code></span></p></td>
<td>Select the mimap level whose
  texel size most closely matches the current pixel, and use the
  <a class="link" href="cogl-Materials.html#COGL-MATERIAL-FILTER-LINEAR:CAPS"><code class="literal">COGL_MATERIAL_FILTER_LINEAR</code></a> criterion
</td>
</tr>
<tr>
<td><p><a name="COGL-MATERIAL-FILTER-NEAREST-MIPMAP-LINEAR:CAPS"></a><span class="term"><code class="literal">COGL_MATERIAL_FILTER_NEAREST_MIPMAP_LINEAR</code></span></p></td>
<td>Select the two mimap levels
  whose texel size most closely matches the current pixel, use
  the <a class="link" href="cogl-Materials.html#COGL-MATERIAL-FILTER-NEAREST:CAPS"><code class="literal">COGL_MATERIAL_FILTER_NEAREST</code></a> criterion on each one and take
  their weighted average
</td>
</tr>
<tr>
<td><p><a name="COGL-MATERIAL-FILTER-LINEAR-MIPMAP-LINEAR:CAPS"></a><span class="term"><code class="literal">COGL_MATERIAL_FILTER_LINEAR_MIPMAP_LINEAR</code></span></p></td>
<td>Select the two mimap levels
  whose texel size most closely matches the current pixel, use
  the <a class="link" href="cogl-Materials.html#COGL-MATERIAL-FILTER-LINEAR:CAPS"><code class="literal">COGL_MATERIAL_FILTER_LINEAR</code></a> criterion on each one and take
  their weighted average
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="cogl-material-set-layer-filters"></a><h3>cogl_material_set_layer_filters ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>                cogl_material_set_layer_filters     (<em class="parameter"><code><a class="link" href="cogl-Materials.html#CoglMaterial" title="CoglMaterial"><span class="type">CoglMaterial</span></a> *material</code></em>,
                                                         <em class="parameter"><code><span class="type">int</span> layer_index</code></em>,
                                                         <em class="parameter"><code><a class="link" href="cogl-Materials.html#CoglMaterialFilter" title="enum CoglMaterialFilter"><span class="type">CoglMaterialFilter</span></a> min_filter</code></em>,
                                                         <em class="parameter"><code><a class="link" href="cogl-Materials.html#CoglMaterialFilter" title="enum CoglMaterialFilter"><span class="type">CoglMaterialFilter</span></a> mag_filter</code></em>);</pre>
<p>
Changes the decimation and interpolation filters used when a texture is
drawn at other scales than 100%.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>material</code></em> :</span></p></td>
<td>A <a class="link" href="cogl-Materials.html#CoglMaterial" title="CoglMaterial"><span class="type">CoglMaterial</span></a> object</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>layer_index</code></em> :</span></p></td>
<td>the layer number to change.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>min_filter</code></em> :</span></p></td>
<td>the filter used when scaling a texture down.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>mag_filter</code></em> :</span></p></td>
<td>the filter used when magnifying a texture.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="CoglMaterialLayerType"></a><h3>enum CoglMaterialLayerType</h3>
<pre class="programlisting">typedef enum {
  COGL_MATERIAL_LAYER_TYPE_TEXTURE
} CoglMaterialLayerType;
</pre>
<p>
Available types of layers for a <a class="link" href="cogl-Materials.html#CoglMaterial" title="CoglMaterial"><span class="type">CoglMaterial</span></a>. This enumeration
might be expanded in later versions.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody><tr>
<td><p><a name="COGL-MATERIAL-LAYER-TYPE-TEXTURE:CAPS"></a><span class="term"><code class="literal">COGL_MATERIAL_LAYER_TYPE_TEXTURE</code></span></p></td>
<td>The layer represents a
  <a class="link" href="cogl-Textures.html" title="Textures">texture</a>
</td>
</tr></tbody>
</table></div>
<p class="since">Since 1.0</p>
</div>
<hr>
<div class="refsect2">
<a name="cogl-material-layer-get-type"></a><h3>cogl_material_layer_get_type ()</h3>
<pre class="programlisting"><a class="link" href="cogl-Materials.html#CoglMaterialLayerType" title="enum CoglMaterialLayerType"><span class="returnvalue">CoglMaterialLayerType</span></a> cogl_material_layer_get_type      (<em class="parameter"><code><a class="link" href="cogl-Materials.html#CoglMaterialLayer" title="CoglMaterialLayer"><span class="type">CoglMaterialLayer</span></a> *layer</code></em>);</pre>
<p>
Retrieves the type of the layer
</p>
<p>
Currently there is only one type of layer defined:
<a class="link" href="cogl-Materials.html#COGL-MATERIAL-LAYER-TYPE-TEXTURE:CAPS"><code class="literal">COGL_MATERIAL_LAYER_TYPE_TEXTURE</code></a>, but considering we may add purely GLSL
based layers in the future, you should write code that checks the type
first.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>layer</code></em> :</span></p></td>
<td>A <a class="link" href="cogl-Materials.html#CoglMaterialLayer" title="CoglMaterialLayer"><span class="type">CoglMaterialLayer</span></a> object</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>the type of the layer</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="cogl-material-layer-get-texture"></a><h3>cogl_material_layer_get_texture ()</h3>
<pre class="programlisting"><a class="link" href="cogl-General-API.html#CoglHandle" title="CoglHandle"><span class="returnvalue">CoglHandle</span></a>          cogl_material_layer_get_texture     (<em class="parameter"><code><a class="link" href="cogl-Materials.html#CoglMaterialLayer" title="CoglMaterialLayer"><span class="type">CoglMaterialLayer</span></a> *layer</code></em>);</pre>
<p>
Extracts a texture handle for a specific layer.
</p>
<p>
</p>
<div class="note" style="margin-left: 0.5in; margin-right: 0.5in;">
<h3 class="title">Note</h3>In the future Cogl may support purely GLSL based layers; for those
layers this function which will likely return <a class="link" href="cogl-General-API.html#COGL-INVALID-HANDLE:CAPS" title="COGL_INVALID_HANDLE"><code class="literal">COGL_INVALID_HANDLE</code></a> if you
try to get the texture handle from them. Considering this scenario, you
should call <a class="link" href="cogl-Materials.html#cogl-material-layer-get-type" title="cogl_material_layer_get_type ()"><code class="function">cogl_material_layer_get_type()</code></a> first in order check it is of
type <a class="link" href="cogl-Materials.html#COGL-MATERIAL-LAYER-TYPE-TEXTURE:CAPS"><code class="literal">COGL_MATERIAL_LAYER_TYPE_TEXTURE</code></a> before calling this function.</div>
<p>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>layer</code></em> :</span></p></td>
<td>A <a class="link" href="cogl-Materials.html#CoglMaterialLayer" title="CoglMaterialLayer"><span class="type">CoglMaterialLayer</span></a> object</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>a <a class="link" href="cogl-General-API.html#CoglHandle" title="CoglHandle"><span class="type">CoglHandle</span></a> for the texture inside the layer. <span class="annotation">[<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>]</span>
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="cogl-material-layer-get-min-filter"></a><h3>cogl_material_layer_get_min_filter ()</h3>
<pre class="programlisting"><a class="link" href="cogl-Materials.html#CoglMaterialFilter" title="enum CoglMaterialFilter"><span class="returnvalue">CoglMaterialFilter</span></a>  cogl_material_layer_get_min_filter  (<em class="parameter"><code><a class="link" href="cogl-Materials.html#CoglMaterialLayer" title="CoglMaterialLayer"><span class="type">CoglMaterialLayer</span></a> *layer</code></em>);</pre>
<p>
Queries the currently set downscaling filter for a material layer
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>layer</code></em> :</span></p></td>
<td>a <a class="link" href="cogl-General-API.html#CoglHandle" title="CoglHandle"><span class="type">CoglHandle</span></a> for a material layer</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>the current downscaling filter</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="cogl-material-layer-get-mag-filter"></a><h3>cogl_material_layer_get_mag_filter ()</h3>
<pre class="programlisting"><a class="link" href="cogl-Materials.html#CoglMaterialFilter" title="enum CoglMaterialFilter"><span class="returnvalue">CoglMaterialFilter</span></a>  cogl_material_layer_get_mag_filter  (<em class="parameter"><code><a class="link" href="cogl-Materials.html#CoglMaterialLayer" title="CoglMaterialLayer"><span class="type">CoglMaterialLayer</span></a> *layer</code></em>);</pre>
<p>
Queries the currently set downscaling filter for a material later
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>layer</code></em> :</span></p></td>
<td>A <a class="link" href="cogl-Materials.html#CoglMaterialLayer" title="CoglMaterialLayer"><span class="type">CoglMaterialLayer</span></a> object</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>the current downscaling filter</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="CoglMaterialWrapMode"></a><h3>enum CoglMaterialWrapMode</h3>
<pre class="programlisting">typedef enum {
  COGL_MATERIAL_WRAP_MODE_REPEAT = 0x2901,
  COGL_MATERIAL_WRAP_MODE_CLAMP_TO_EDGE = 0x812F,
  COGL_MATERIAL_WRAP_MODE_AUTOMATIC = 0x0207
} CoglMaterialWrapMode;
</pre>
<p>
The wrap mode specifies what happens when texture coordinates
outside the range 0→1 are used. Note that if the filter mode is
anything but <a class="link" href="cogl-Materials.html#COGL-MATERIAL-FILTER-NEAREST:CAPS"><code class="literal">COGL_MATERIAL_FILTER_NEAREST</code></a> then texels outside the
range 0→1 might be used even when the coordinate is exactly 0 or 1
because OpenGL will try to sample neighbouring pixels. For example
if you are trying to render the full texture then you may get
artifacts around the edges when the pixels from the other side are
merged in if the wrap mode is set to repeat.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><a name="COGL-MATERIAL-WRAP-MODE-REPEAT:CAPS"></a><span class="term"><code class="literal">COGL_MATERIAL_WRAP_MODE_REPEAT</code></span></p></td>
<td>The texture will be repeated. This
  is useful for example to draw a tiled background.
</td>
</tr>
<tr>
<td><p><a name="COGL-MATERIAL-WRAP-MODE-CLAMP-TO-EDGE:CAPS"></a><span class="term"><code class="literal">COGL_MATERIAL_WRAP_MODE_CLAMP_TO_EDGE</code></span></p></td>
<td>The coordinates outside the
  range 0→1 will sample copies of the edge pixels of the
  texture. This is useful to avoid artifacts if only one copy of
  the texture is being rendered.
</td>
</tr>
<tr>
<td><p><a name="COGL-MATERIAL-WRAP-MODE-AUTOMATIC:CAPS"></a><span class="term"><code class="literal">COGL_MATERIAL_WRAP_MODE_AUTOMATIC</code></span></p></td>
<td>Cogl will try to automatically
  decide which of the above two to use. For <a class="link" href="cogl-Primitives.html#cogl-rectangle" title="cogl_rectangle ()"><code class="function">cogl_rectangle()</code></a>, it
  will use repeat mode if any of the texture coordinates are
  outside the range 0→1, otherwise it will use clamp to edge. For
  <a class="link" href="cogl-Primitives.html#cogl-polygon" title="cogl_polygon ()"><code class="function">cogl_polygon()</code></a> it will always use repeat mode. For
  <a class="link" href="cogl-Vertex-Buffers.html#cogl-vertex-buffer-draw" title="cogl_vertex_buffer_draw ()"><code class="function">cogl_vertex_buffer_draw()</code></a> it will use repeat mode except for
  layers that have point sprite coordinate generation enabled. This
  is the default value.
</td>
</tr>
</tbody>
</table></div>
<p class="since">Since 1.4</p>
</div>
<hr>
<div class="refsect2">
<a name="cogl-material-set-layer-wrap-mode"></a><h3>cogl_material_set_layer_wrap_mode ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>                cogl_material_set_layer_wrap_mode   (<em class="parameter"><code><a class="link" href="cogl-Materials.html#CoglMaterial" title="CoglMaterial"><span class="type">CoglMaterial</span></a> *material</code></em>,
                                                         <em class="parameter"><code><span class="type">int</span> layer_index</code></em>,
                                                         <em class="parameter"><code><a class="link" href="cogl-Materials.html#CoglMaterialWrapMode" title="enum CoglMaterialWrapMode"><span class="type">CoglMaterialWrapMode</span></a> mode</code></em>);</pre>
<p>
Sets the wrap mode for all three coordinates of texture lookups on
this layer. This is equivalent to calling
<a class="link" href="cogl-Materials.html#cogl-material-set-layer-wrap-mode-s" title="cogl_material_set_layer_wrap_mode_s ()"><code class="function">cogl_material_set_layer_wrap_mode_s()</code></a>,
<a class="link" href="cogl-Materials.html#cogl-material-set-layer-wrap-mode-t" title="cogl_material_set_layer_wrap_mode_t ()"><code class="function">cogl_material_set_layer_wrap_mode_t()</code></a> and
<a class="link" href="cogl-Materials.html#cogl-material-set-layer-wrap-mode-p" title="cogl_material_set_layer_wrap_mode_p ()"><code class="function">cogl_material_set_layer_wrap_mode_p()</code></a> separately.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>material</code></em> :</span></p></td>
<td>A <a class="link" href="cogl-Materials.html#CoglMaterial" title="CoglMaterial"><span class="type">CoglMaterial</span></a> object</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>layer_index</code></em> :</span></p></td>
<td>the layer number to change.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>mode</code></em> :</span></p></td>
<td>the new wrap mode</td>
</tr>
</tbody>
</table></div>
<p class="since">Since 1.4</p>
</div>
<hr>
<div class="refsect2">
<a name="cogl-material-set-layer-wrap-mode-s"></a><h3>cogl_material_set_layer_wrap_mode_s ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>                cogl_material_set_layer_wrap_mode_s (<em class="parameter"><code><a class="link" href="cogl-Materials.html#CoglMaterial" title="CoglMaterial"><span class="type">CoglMaterial</span></a> *material</code></em>,
                                                         <em class="parameter"><code><span class="type">int</span> layer_index</code></em>,
                                                         <em class="parameter"><code><a class="link" href="cogl-Materials.html#CoglMaterialWrapMode" title="enum CoglMaterialWrapMode"><span class="type">CoglMaterialWrapMode</span></a> mode</code></em>);</pre>
<p>
Sets the wrap mode for the 's' coordinate of texture lookups on this layer.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>material</code></em> :</span></p></td>
<td>A <a class="link" href="cogl-Materials.html#CoglMaterial" title="CoglMaterial"><span class="type">CoglMaterial</span></a> object</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>layer_index</code></em> :</span></p></td>
<td>the layer number to change.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>mode</code></em> :</span></p></td>
<td>the new wrap mode</td>
</tr>
</tbody>
</table></div>
<p class="since">Since 1.4</p>
</div>
<hr>
<div class="refsect2">
<a name="cogl-material-set-layer-wrap-mode-t"></a><h3>cogl_material_set_layer_wrap_mode_t ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>                cogl_material_set_layer_wrap_mode_t (<em class="parameter"><code><a class="link" href="cogl-Materials.html#CoglMaterial" title="CoglMaterial"><span class="type">CoglMaterial</span></a> *material</code></em>,
                                                         <em class="parameter"><code><span class="type">int</span> layer_index</code></em>,
                                                         <em class="parameter"><code><a class="link" href="cogl-Materials.html#CoglMaterialWrapMode" title="enum CoglMaterialWrapMode"><span class="type">CoglMaterialWrapMode</span></a> mode</code></em>);</pre>
<p>
Sets the wrap mode for the 't' coordinate of texture lookups on this layer.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>material</code></em> :</span></p></td>
<td>A <a class="link" href="cogl-Materials.html#CoglMaterial" title="CoglMaterial"><span class="type">CoglMaterial</span></a> object</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>layer_index</code></em> :</span></p></td>
<td>the layer number to change.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>mode</code></em> :</span></p></td>
<td>the new wrap mode</td>
</tr>
</tbody>
</table></div>
<p class="since">Since 1.4</p>
</div>
<hr>
<div class="refsect2">
<a name="cogl-material-set-layer-wrap-mode-p"></a><h3>cogl_material_set_layer_wrap_mode_p ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>                cogl_material_set_layer_wrap_mode_p (<em class="parameter"><code><a class="link" href="cogl-Materials.html#CoglMaterial" title="CoglMaterial"><span class="type">CoglMaterial</span></a> *material</code></em>,
                                                         <em class="parameter"><code><span class="type">int</span> layer_index</code></em>,
                                                         <em class="parameter"><code><a class="link" href="cogl-Materials.html#CoglMaterialWrapMode" title="enum CoglMaterialWrapMode"><span class="type">CoglMaterialWrapMode</span></a> mode</code></em>);</pre>
<p>
Sets the wrap mode for the 'p' coordinate of texture lookups on
this layer. 'p' is the third coordinate.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>material</code></em> :</span></p></td>
<td>A <a class="link" href="cogl-Materials.html#CoglMaterial" title="CoglMaterial"><span class="type">CoglMaterial</span></a> object</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>layer_index</code></em> :</span></p></td>
<td>the layer number to change.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>mode</code></em> :</span></p></td>
<td>the new wrap mode</td>
</tr>
</tbody>
</table></div>
<p class="since">Since 1.4</p>
</div>
<hr>
<div class="refsect2">
<a name="cogl-material-get-layer-wrap-mode-s"></a><h3>cogl_material_get_layer_wrap_mode_s ()</h3>
<pre class="programlisting"><a class="link" href="cogl-Materials.html#CoglMaterialWrapMode" title="enum CoglMaterialWrapMode"><span class="returnvalue">CoglMaterialWrapMode</span></a> cogl_material_get_layer_wrap_mode_s
                                                        (<em class="parameter"><code><a class="link" href="cogl-Materials.html#CoglMaterial" title="CoglMaterial"><span class="type">CoglMaterial</span></a> *material</code></em>,
                                                         <em class="parameter"><code><span class="type">int</span> layer_index</code></em>);</pre>
<p>
Returns the wrap mode for the 's' coordinate of texture lookups on this
layer.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>material</code></em> :</span></p></td>
<td>A <a class="link" href="cogl-Materials.html#CoglMaterial" title="CoglMaterial"><span class="type">CoglMaterial</span></a> object</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>layer_index</code></em> :</span></p></td>
<td>the layer number to change.</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>the wrap mode for the 's' coordinate of texture lookups on
this layer.</td>
</tr>
</tbody>
</table></div>
<p class="since">Since 1.6</p>
</div>
<hr>
<div class="refsect2">
<a name="cogl-material-get-layer-wrap-mode-t"></a><h3>cogl_material_get_layer_wrap_mode_t ()</h3>
<pre class="programlisting"><a class="link" href="cogl-Materials.html#CoglMaterialWrapMode" title="enum CoglMaterialWrapMode"><span class="returnvalue">CoglMaterialWrapMode</span></a> cogl_material_get_layer_wrap_mode_t
                                                        (<em class="parameter"><code><a class="link" href="cogl-Materials.html#CoglMaterial" title="CoglMaterial"><span class="type">CoglMaterial</span></a> *material</code></em>,
                                                         <em class="parameter"><code><span class="type">int</span> layer_index</code></em>);</pre>
<p>
Returns the wrap mode for the 't' coordinate of texture lookups on this
layer.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>material</code></em> :</span></p></td>
<td>A <a class="link" href="cogl-Materials.html#CoglMaterial" title="CoglMaterial"><span class="type">CoglMaterial</span></a> object</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>layer_index</code></em> :</span></p></td>
<td>the layer number to change.</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>the wrap mode for the 't' coordinate of texture lookups on
this layer.</td>
</tr>
</tbody>
</table></div>
<p class="since">Since 1.6</p>
</div>
<hr>
<div class="refsect2">
<a name="cogl-material-get-layer-wrap-mode-p"></a><h3>cogl_material_get_layer_wrap_mode_p ()</h3>
<pre class="programlisting"><a class="link" href="cogl-Materials.html#CoglMaterialWrapMode" title="enum CoglMaterialWrapMode"><span class="returnvalue">CoglMaterialWrapMode</span></a> cogl_material_get_layer_wrap_mode_p
                                                        (<em class="parameter"><code><a class="link" href="cogl-Materials.html#CoglMaterial" title="CoglMaterial"><span class="type">CoglMaterial</span></a> *material</code></em>,
                                                         <em class="parameter"><code><span class="type">int</span> layer_index</code></em>);</pre>
<p>
Returns the wrap mode for the 'p' coordinate of texture lookups on this
layer.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>material</code></em> :</span></p></td>
<td>A <a class="link" href="cogl-Materials.html#CoglMaterial" title="CoglMaterial"><span class="type">CoglMaterial</span></a> object</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>layer_index</code></em> :</span></p></td>
<td>the layer number to change.</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>the wrap mode for the 'p' coordinate of texture lookups on
this layer.</td>
</tr>
</tbody>
</table></div>
<p class="since">Since 1.6</p>
</div>
<hr>
<div class="refsect2">
<a name="cogl-material-wrap-mode-get-type"></a><h3>cogl_material_wrap_mode_get_type ()</h3>
<pre class="programlisting"><span class="returnvalue">GType</span>               cogl_material_wrap_mode_get_type    (<em class="parameter"><code><span class="type">void</span></code></em>);</pre>
</div>
<hr>
<div class="refsect2">
<a name="cogl-material-set-user-program"></a><h3>cogl_material_set_user_program ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>                cogl_material_set_user_program      (<em class="parameter"><code><a class="link" href="cogl-Materials.html#CoglMaterial" title="CoglMaterial"><span class="type">CoglMaterial</span></a> *material</code></em>,
                                                         <em class="parameter"><code><a class="link" href="cogl-General-API.html#CoglHandle" title="CoglHandle"><span class="type">CoglHandle</span></a> program</code></em>);</pre>
<p>
Associates a linked CoglProgram with the given material so that the
program can take full control of vertex and/or fragment processing.
</p>
<p>
This is an example of how it can be used to associate an ARBfp
program with a <a class="link" href="cogl-Materials.html#CoglMaterial" title="CoglMaterial"><span class="type">CoglMaterial</span></a>:
</p>
<div class="informalexample">
  <table class="listing_frame" border="0" cellpadding="0" cellspacing="0">
    <tbody>
      <tr>
        <td class="listing_lines" align="right"><pre>1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20</pre></td>
        <td class="listing_code"><pre class="programlisting">CoglHandle shader<span class="gtkdoc opt">;</span>
CoglHandle program<span class="gtkdoc opt">;</span>
CoglMaterial <span class="gtkdoc opt">*</span>material<span class="gtkdoc opt">;</span>

shader <span class="gtkdoc opt">=</span> <span class="function"><a href="cogl-Shaders-and-Programmable-Pipeline.html#cogl-create-shader">cogl_create_shader</a></span> <span class="gtkdoc opt">(</span>COGL_SHADER_TYPE_FRAGMENT<span class="gtkdoc opt">);</span>
<span class="function"><a href="cogl-Shaders-and-Programmable-Pipeline.html#cogl-shader-source">cogl_shader_source</a></span> <span class="gtkdoc opt">(</span>shader<span class="gtkdoc opt">,</span>
                    <span class="string">&quot;!!ARBfp1.0</span><span class="gtkdoc esc">\n</span><span class="string">&quot;</span>
                    <span class="string">&quot;MOV result.color,fragment.color;</span><span class="gtkdoc esc">\n</span><span class="string">&quot;</span>
                    <span class="string">&quot;END</span><span class="gtkdoc esc">\n</span><span class="string">&quot;</span><span class="gtkdoc opt">);</span>
<span class="function"><a href="cogl-Shaders-and-Programmable-Pipeline.html#cogl-shader-compile">cogl_shader_compile</a></span> <span class="gtkdoc opt">(</span>shader<span class="gtkdoc opt">);</span>

program <span class="gtkdoc opt">=</span> <span class="function"><a href="cogl-Shaders-and-Programmable-Pipeline.html#cogl-create-program">cogl_create_program</a></span> <span class="gtkdoc opt">();</span>
<span class="function"><a href="cogl-Shaders-and-Programmable-Pipeline.html#cogl-program-attach-shader">cogl_program_attach_shader</a></span> <span class="gtkdoc opt">(</span>program<span class="gtkdoc opt">,</span> shader<span class="gtkdoc opt">);</span>
<span class="function"><a href="cogl-Shaders-and-Programmable-Pipeline.html#cogl-program-link">cogl_program_link</a></span> <span class="gtkdoc opt">(</span>program<span class="gtkdoc opt">);</span>

material <span class="gtkdoc opt">=</span> <span class="function"><a href="cogl-Materials.html#cogl-material-new">cogl_material_new</a></span> <span class="gtkdoc opt">();</span>
<span class="function"><a href="cogl-Materials.html#cogl-material-set-user-program">cogl_material_set_user_program</a></span> <span class="gtkdoc opt">(</span>material<span class="gtkdoc opt">,</span> program<span class="gtkdoc opt">);</span>

<span class="function"><a href="cogl-General-API.html#cogl-set-source-color4ub">cogl_set_source_color4ub</a></span> <span class="gtkdoc opt">(</span><span class="number">0xff</span><span class="gtkdoc opt">,</span> <span class="number">0x00</span><span class="gtkdoc opt">,</span> <span class="number">0x00</span><span class="gtkdoc opt">,</span> <span class="number">0xff</span><span class="gtkdoc opt">);</span>
<span class="function"><a href="cogl-Primitives.html#cogl-rectangle">cogl_rectangle</a></span> <span class="gtkdoc opt">(</span><span class="number">0</span><span class="gtkdoc opt">,</span> <span class="number">0</span><span class="gtkdoc opt">,</span> <span class="number">100</span><span class="gtkdoc opt">,</span> <span class="number">100</span><span class="gtkdoc opt">);</span></pre></td>
      </tr>
    </tbody>
  </table>
</div>

<p>
</p>
<p>
It is possibly worth keeping in mind that this API is not part of
the long term design for how we want to expose shaders to Cogl
developers (We are planning on deprecating the cogl_program and
cogl_shader APIs in favour of a "snippet" framework) but in the
meantime we hope this will handle most practical GLSL and ARBfp
requirements.
</p>
<p>
Also remember you need to check for either the
<a class="link" href="cogl-General-API.html#COGL-FEATURE-SHADERS-GLSL:CAPS"><code class="literal">COGL_FEATURE_SHADERS_GLSL</code></a> or <a class="link" href="cogl-General-API.html#COGL-FEATURE-SHADERS-ARBFP:CAPS"><code class="literal">COGL_FEATURE_SHADERS_ARBFP</code></a> before
using the cogl_program or cogl_shader API.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>material</code></em> :</span></p></td>
<td>a <a class="link" href="cogl-Materials.html#CoglMaterial" title="CoglMaterial"><span class="type">CoglMaterial</span></a> object.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>program</code></em> :</span></p></td>
<td>A <a class="link" href="cogl-General-API.html#CoglHandle" title="CoglHandle"><span class="type">CoglHandle</span></a> to a linked CoglProgram</td>
</tr>
</tbody>
</table></div>
<p class="since">Since 1.4</p>
</div>
<hr>
<div class="refsect2">
<a name="cogl-material-get-user-program"></a><h3>cogl_material_get_user_program ()</h3>
<pre class="programlisting"><a class="link" href="cogl-General-API.html#CoglHandle" title="CoglHandle"><span class="returnvalue">CoglHandle</span></a>          cogl_material_get_user_program      (<em class="parameter"><code><a class="link" href="cogl-Materials.html#CoglMaterial" title="CoglMaterial"><span class="type">CoglMaterial</span></a> *material</code></em>);</pre>
<p>
Queries what user program has been associated with the given
<em class="parameter"><code>material</code></em> using <a class="link" href="cogl-Materials.html#cogl-material-set-user-program" title="cogl_material_set_user_program ()"><code class="function">cogl_material_set_user_program()</code></a>.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>material</code></em> :</span></p></td>
<td>a <a class="link" href="cogl-Materials.html#CoglMaterial" title="CoglMaterial"><span class="type">CoglMaterial</span></a> object.</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>The current user program
or <a class="link" href="cogl-General-API.html#COGL-INVALID-HANDLE:CAPS" title="COGL_INVALID_HANDLE"><code class="literal">COGL_INVALID_HANDLE</code></a>. <span class="annotation">[<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>]</span>
</td>
</tr>
</tbody>
</table></div>
<p class="since">Since 1.4</p>
</div>
<hr>
<div class="refsect2">
<a name="cogl-material-foreach-layer"></a><h3>cogl_material_foreach_layer ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>                cogl_material_foreach_layer         (<em class="parameter"><code><a class="link" href="cogl-Materials.html#CoglMaterial" title="CoglMaterial"><span class="type">CoglMaterial</span></a> *material</code></em>,
                                                         <em class="parameter"><code><a class="link" href="cogl-Materials.html#CoglMaterialLayerCallback" title="CoglMaterialLayerCallback ()"><span class="type">CoglMaterialLayerCallback</span></a> callback</code></em>,
                                                         <em class="parameter"><code><span class="type">void</span> *user_data</code></em>);</pre>
<p>
Iterates all the layer indices of the given <em class="parameter"><code>material</code></em>.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>material</code></em> :</span></p></td>
<td>A <a class="link" href="cogl-Materials.html#CoglMaterial" title="CoglMaterial"><span class="type">CoglMaterial</span></a> object</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>callback</code></em> :</span></p></td>
<td>A <a class="link" href="cogl-Materials.html#CoglMaterialLayerCallback" title="CoglMaterialLayerCallback ()"><span class="type">CoglMaterialLayerCallback</span></a> to be called for each layer
index</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>user_data</code></em> :</span></p></td>
<td>Private data that will be passed to the callback</td>
</tr>
</tbody>
</table></div>
<p class="since">Since 1.4</p>
<p class="stability">Stability Level: Unstable</p>
</div>
</div>
</div>
<div class="footer">
<hr>
          Generated by GTK-Doc V1.18</div>
</body>
</html>