/usr/share/gtk-doc/html/libvips/VipsImage.html is in libvips-doc 8.4.5-1.
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 2120 2121 2122 2123 2124 2125 2126 2127 2128 2129 2130 2131 2132 2133 2134 2135 2136 2137 2138 2139 2140 2141 2142 2143 2144 2145 2146 2147 2148 2149 2150 2151 2152 2153 2154 2155 2156 2157 2158 2159 2160 2161 2162 2163 2164 2165 2166 2167 2168 2169 2170 2171 2172 2173 2174 2175 2176 2177 2178 2179 2180 2181 2182 2183 2184 2185 2186 2187 2188 2189 2190 2191 2192 2193 2194 2195 2196 2197 2198 2199 2200 2201 2202 2203 2204 2205 2206 2207 2208 2209 2210 2211 2212 2213 2214 2215 2216 2217 2218 2219 2220 2221 2222 2223 2224 2225 2226 2227 2228 2229 2230 2231 2232 2233 2234 2235 2236 2237 2238 2239 2240 2241 2242 2243 2244 2245 2246 2247 2248 2249 2250 2251 2252 2253 2254 2255 2256 2257 2258 2259 2260 2261 2262 2263 2264 2265 2266 2267 2268 2269 2270 2271 2272 2273 2274 2275 2276 2277 2278 2279 2280 2281 2282 2283 2284 2285 2286 2287 2288 2289 2290 2291 2292 2293 2294 2295 2296 2297 2298 2299 2300 2301 2302 2303 2304 2305 2306 2307 2308 2309 2310 2311 2312 2313 2314 2315 2316 2317 2318 2319 2320 2321 2322 2323 2324 2325 2326 2327 2328 2329 2330 2331 2332 2333 2334 2335 2336 2337 2338 2339 2340 2341 2342 2343 2344 2345 2346 2347 2348 2349 2350 2351 2352 2353 2354 2355 2356 2357 2358 2359 2360 2361 2362 2363 2364 2365 2366 2367 2368 2369 2370 2371 2372 2373 2374 2375 2376 2377 2378 2379 2380 2381 2382 2383 2384 2385 2386 2387 2388 2389 2390 2391 2392 2393 2394 2395 2396 2397 2398 2399 2400 2401 2402 2403 2404 2405 2406 2407 2408 2409 2410 2411 2412 2413 2414 2415 2416 2417 2418 2419 2420 2421 2422 2423 2424 2425 2426 2427 2428 2429 2430 2431 2432 2433 2434 2435 2436 2437 2438 2439 2440 2441 2442 2443 2444 2445 2446 2447 2448 2449 2450 2451 2452 2453 2454 2455 2456 2457 2458 2459 2460 2461 2462 2463 2464 2465 2466 2467 2468 2469 2470 2471 2472 2473 2474 2475 2476 2477 2478 2479 2480 2481 2482 2483 2484 2485 2486 2487 2488 2489 2490 2491 2492 2493 2494 2495 2496 2497 2498 2499 2500 2501 2502 2503 2504 2505 2506 2507 2508 2509 2510 2511 2512 2513 2514 2515 2516 2517 2518 2519 2520 2521 2522 2523 2524 2525 2526 2527 2528 2529 2530 2531 2532 2533 2534 2535 2536 2537 2538 2539 2540 2541 2542 2543 2544 2545 2546 2547 2548 2549 2550 2551 2552 2553 2554 2555 2556 2557 2558 2559 2560 2561 2562 2563 2564 2565 2566 2567 2568 2569 2570 2571 2572 2573 2574 2575 2576 2577 2578 2579 2580 2581 2582 2583 2584 2585 2586 2587 2588 2589 2590 2591 2592 2593 2594 2595 2596 2597 2598 2599 2600 2601 2602 2603 2604 2605 2606 2607 2608 2609 2610 2611 2612 2613 2614 2615 2616 2617 2618 2619 2620 2621 2622 2623 2624 2625 2626 2627 2628 2629 2630 2631 2632 2633 2634 2635 2636 2637 2638 2639 2640 2641 2642 2643 2644 2645 2646 2647 2648 2649 2650 2651 2652 2653 2654 2655 2656 2657 2658 2659 2660 2661 2662 2663 2664 2665 2666 2667 2668 2669 2670 2671 2672 2673 2674 2675 2676 2677 2678 2679 2680 2681 2682 2683 2684 2685 2686 2687 2688 2689 2690 2691 2692 2693 2694 2695 2696 2697 2698 2699 2700 2701 2702 2703 2704 2705 2706 2707 2708 2709 2710 2711 2712 2713 2714 2715 2716 2717 2718 2719 2720 2721 2722 2723 2724 2725 2726 2727 2728 2729 2730 2731 2732 2733 2734 2735 2736 2737 2738 2739 2740 2741 2742 2743 2744 2745 2746 2747 2748 2749 2750 2751 2752 2753 2754 2755 2756 2757 2758 2759 2760 2761 2762 2763 2764 2765 2766 2767 2768 2769 2770 2771 2772 2773 2774 2775 2776 2777 2778 2779 2780 2781 2782 2783 2784 2785 2786 2787 2788 2789 2790 2791 2792 2793 2794 2795 2796 2797 2798 2799 2800 2801 2802 2803 2804 2805 2806 2807 2808 2809 2810 2811 2812 2813 2814 2815 2816 2817 2818 2819 2820 2821 2822 2823 2824 2825 2826 2827 2828 2829 2830 2831 2832 2833 2834 2835 2836 2837 2838 2839 2840 2841 2842 2843 2844 2845 2846 2847 2848 2849 2850 2851 2852 2853 2854 2855 2856 2857 2858 2859 2860 2861 2862 2863 2864 2865 2866 2867 2868 2869 2870 2871 2872 2873 2874 2875 2876 2877 2878 2879 2880 2881 2882 2883 2884 2885 2886 2887 2888 2889 2890 2891 2892 2893 2894 2895 2896 2897 2898 2899 2900 2901 2902 2903 2904 2905 2906 2907 2908 2909 2910 2911 2912 2913 2914 2915 2916 2917 2918 2919 2920 2921 2922 2923 2924 2925 2926 2927 2928 2929 2930 2931 2932 2933 2934 2935 2936 2937 2938 2939 2940 2941 2942 2943 2944 2945 2946 2947 2948 2949 2950 2951 2952 2953 2954 2955 2956 2957 2958 2959 2960 2961 2962 2963 2964 2965 2966 2967 2968 2969 2970 2971 2972 2973 2974 2975 2976 2977 2978 2979 2980 2981 2982 2983 2984 2985 2986 2987 2988 2989 2990 2991 2992 2993 2994 2995 2996 2997 2998 2999 3000 3001 3002 3003 3004 3005 3006 3007 3008 3009 3010 3011 3012 3013 3014 3015 3016 3017 3018 3019 3020 3021 3022 3023 3024 3025 3026 3027 3028 3029 3030 3031 3032 3033 3034 3035 3036 3037 3038 3039 3040 3041 3042 3043 3044 3045 3046 3047 3048 3049 3050 3051 3052 3053 3054 3055 3056 3057 3058 3059 3060 3061 3062 3063 3064 3065 3066 3067 3068 3069 3070 3071 3072 3073 3074 3075 3076 3077 3078 3079 3080 3081 3082 3083 3084 3085 3086 3087 3088 3089 3090 3091 3092 3093 3094 3095 3096 3097 3098 3099 3100 3101 3102 3103 3104 3105 3106 3107 3108 3109 3110 3111 3112 3113 3114 3115 3116 3117 3118 3119 3120 3121 3122 3123 3124 3125 3126 3127 3128 3129 3130 3131 3132 3133 3134 3135 3136 3137 3138 3139 3140 3141 3142 3143 3144 3145 3146 3147 3148 3149 3150 3151 3152 3153 3154 3155 3156 3157 3158 3159 3160 3161 3162 3163 3164 3165 3166 3167 3168 3169 3170 3171 3172 3173 3174 3175 3176 3177 3178 3179 3180 3181 3182 3183 3184 3185 3186 3187 3188 3189 3190 3191 3192 3193 3194 3195 3196 3197 3198 3199 3200 3201 3202 3203 3204 3205 3206 3207 3208 3209 3210 3211 3212 3213 3214 3215 3216 3217 3218 3219 3220 3221 3222 3223 3224 3225 3226 3227 3228 3229 3230 3231 3232 3233 3234 3235 3236 3237 3238 3239 3240 3241 3242 3243 3244 3245 3246 3247 3248 3249 3250 3251 3252 3253 3254 3255 3256 3257 3258 3259 3260 3261 3262 3263 3264 3265 3266 3267 3268 3269 3270 3271 3272 3273 3274 3275 3276 3277 3278 3279 3280 3281 3282 3283 3284 3285 3286 3287 3288 3289 3290 3291 3292 3293 3294 3295 3296 3297 3298 3299 3300 3301 3302 3303 3304 3305 3306 3307 3308 3309 3310 3311 3312 3313 3314 3315 3316 3317 3318 3319 3320 3321 3322 3323 3324 3325 3326 3327 3328 3329 3330 3331 3332 3333 3334 3335 3336 3337 3338 3339 3340 3341 3342 3343 3344 3345 3346 3347 3348 3349 3350 3351 3352 3353 3354 3355 3356 3357 3358 3359 3360 3361 3362 3363 3364 3365 3366 3367 3368 3369 3370 3371 3372 3373 3374 3375 3376 3377 3378 3379 3380 3381 3382 3383 3384 3385 3386 3387 3388 3389 3390 3391 3392 3393 3394 3395 3396 3397 3398 3399 3400 3401 3402 3403 3404 3405 3406 3407 3408 3409 3410 3411 3412 3413 3414 3415 3416 3417 3418 3419 3420 3421 3422 3423 3424 3425 3426 3427 3428 3429 3430 3431 3432 3433 3434 3435 3436 3437 3438 3439 3440 3441 3442 3443 3444 3445 3446 3447 3448 3449 3450 3451 3452 3453 3454 3455 3456 3457 3458 3459 3460 3461 3462 3463 3464 3465 3466 3467 3468 3469 3470 3471 3472 3473 3474 3475 3476 3477 3478 3479 3480 3481 3482 3483 3484 3485 3486 3487 3488 3489 3490 3491 3492 3493 3494 3495 3496 3497 3498 3499 3500 3501 3502 3503 3504 3505 3506 3507 3508 3509 3510 3511 3512 3513 3514 3515 3516 3517 3518 3519 3520 3521 3522 3523 3524 3525 3526 3527 3528 3529 3530 3531 3532 3533 3534 3535 3536 3537 3538 3539 3540 3541 3542 3543 3544 3545 3546 3547 3548 3549 3550 3551 3552 3553 3554 3555 3556 3557 3558 3559 3560 3561 3562 3563 3564 3565 3566 3567 3568 3569 3570 3571 3572 3573 3574 3575 3576 3577 3578 3579 3580 3581 3582 3583 3584 3585 3586 3587 3588 3589 3590 3591 3592 3593 3594 3595 3596 3597 3598 3599 3600 3601 3602 3603 3604 3605 3606 3607 3608 3609 3610 3611 3612 3613 3614 3615 3616 3617 3618 3619 3620 3621 3622 3623 3624 3625 3626 3627 3628 3629 3630 3631 3632 3633 3634 3635 3636 3637 3638 3639 3640 3641 3642 3643 3644 3645 3646 3647 3648 3649 3650 3651 3652 3653 3654 3655 3656 3657 3658 3659 3660 3661 3662 3663 3664 3665 3666 3667 3668 3669 3670 3671 3672 3673 3674 3675 3676 3677 3678 3679 3680 3681 3682 3683 3684 3685 3686 3687 3688 3689 3690 3691 3692 3693 3694 3695 3696 3697 3698 3699 3700 3701 3702 3703 3704 3705 3706 3707 3708 3709 3710 3711 3712 3713 3714 3715 3716 3717 3718 3719 3720 3721 3722 3723 3724 3725 3726 3727 3728 3729 3730 3731 3732 3733 3734 3735 3736 3737 3738 3739 3740 3741 3742 3743 3744 3745 3746 3747 3748 3749 3750 3751 3752 3753 3754 3755 3756 3757 3758 3759 3760 3761 3762 3763 3764 3765 3766 3767 3768 3769 3770 3771 3772 3773 3774 3775 3776 3777 3778 3779 3780 3781 3782 3783 3784 3785 3786 3787 3788 3789 3790 3791 3792 3793 3794 3795 3796 3797 3798 3799 3800 3801 3802 3803 3804 3805 3806 3807 3808 3809 3810 3811 3812 3813 3814 3815 3816 3817 3818 3819 3820 3821 3822 3823 3824 3825 3826 3827 3828 3829 3830 3831 3832 3833 3834 3835 3836 3837 3838 3839 3840 3841 3842 3843 3844 3845 3846 3847 3848 3849 3850 3851 3852 3853 3854 3855 3856 3857 3858 3859 3860 3861 3862 3863 3864 3865 3866 3867 3868 3869 3870 3871 3872 3873 3874 3875 3876 3877 3878 3879 3880 3881 3882 3883 3884 3885 3886 3887 3888 3889 3890 3891 3892 3893 3894 3895 3896 3897 3898 3899 3900 3901 3902 3903 3904 3905 3906 3907 3908 3909 3910 3911 3912 3913 3914 3915 3916 3917 3918 3919 3920 3921 3922 3923 3924 3925 3926 3927 3928 3929 3930 3931 3932 3933 3934 3935 3936 3937 3938 3939 3940 3941 3942 3943 3944 3945 3946 3947 3948 3949 3950 3951 3952 3953 3954 3955 3956 3957 3958 3959 3960 3961 3962 3963 3964 3965 3966 3967 3968 3969 3970 3971 3972 3973 3974 3975 3976 3977 3978 3979 3980 3981 3982 3983 3984 3985 3986 3987 3988 3989 3990 3991 3992 3993 3994 3995 3996 3997 3998 3999 4000 4001 4002 4003 4004 4005 4006 4007 4008 4009 4010 4011 4012 4013 4014 4015 4016 4017 4018 4019 4020 4021 4022 4023 4024 4025 4026 4027 4028 4029 4030 4031 4032 4033 4034 4035 4036 4037 4038 4039 4040 4041 4042 4043 4044 4045 4046 4047 4048 4049 4050 4051 4052 4053 4054 4055 4056 4057 4058 4059 4060 4061 4062 4063 4064 4065 4066 4067 4068 4069 4070 4071 4072 4073 4074 4075 4076 4077 4078 4079 4080 4081 4082 4083 4084 4085 4086 4087 4088 4089 4090 4091 4092 4093 4094 4095 4096 4097 4098 4099 4100 | <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>VipsImage: VIPS Reference Manual</title>
<meta name="generator" content="DocBook XSL Stylesheets V1.79.1">
<link rel="home" href="index.html" title="VIPS Reference Manual">
<link rel="up" href="ch02.html" title="Core VIPS API">
<link rel="prev" href="libvips-vips.html" title="vips">
<link rel="next" href="libvips-header.html" title="header">
<meta name="generator" content="GTK-Doc V1.25 (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="5"><tr valign="middle">
<td width="100%" align="left" class="shortcuts">
<a href="#" class="shortcut">Top</a><span id="nav_description"> <span class="dim">|</span>
<a href="#VipsImage.description" class="shortcut">Description</a></span><span id="nav_hierarchy"> <span class="dim">|</span>
<a href="#VipsImage.object-hierarchy" class="shortcut">Object Hierarchy</a></span><span id="nav_properties"> <span class="dim">|</span>
<a href="#VipsImage.properties" class="shortcut">Properties</a></span><span id="nav_signals"> <span class="dim">|</span>
<a href="#VipsImage.signals" class="shortcut">Signals</a></span>
</td>
<td><a accesskey="h" href="index.html"><img src="home.png" width="16" height="16" border="0" alt="Home"></a></td>
<td><a accesskey="u" href="ch02.html"><img src="up.png" width="16" height="16" border="0" alt="Up"></a></td>
<td><a accesskey="p" href="libvips-vips.html"><img src="left.png" width="16" height="16" border="0" alt="Prev"></a></td>
<td><a accesskey="n" href="libvips-header.html"><img src="right.png" width="16" height="16" border="0" alt="Next"></a></td>
</tr></table>
<div class="refentry">
<a name="VipsImage"></a><div class="titlepage"></div>
<div class="refnamediv"><table width="100%"><tr>
<td valign="top">
<h2><span class="refentrytitle"><a name="VipsImage.top_of_page"></a>VipsImage</span></h2>
<p>VipsImage — the VIPS image class</p>
</td>
<td class="gallery_image" valign="top" align="right"></td>
</tr></table></div>
<div class="refsect1">
<a name="VipsImage.stability-level"></a><h2>Stability Level</h2>
<acronym title="The intention of a Stable interface is to enable arbitrary third parties to
develop applications to these interfaces, release them, and have confidence that
they will run on all minor releases of the product (after the one in which the
interface was introduced, and within the same major release). Even at a major
release, incompatible changes are expected to be rare, and to have strong
justifications.
"><span class="acronym">Stable</span></acronym>, unless otherwise indicated
</div>
<div class="refsect1">
<a name="VipsImage.functions"></a><h2>Functions</h2>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="functions_return">
<col class="functions_name">
</colgroup>
<tbody>
<tr>
<td class="function_type">
<span class="returnvalue">void</span> *
</td>
<td class="function_name">
<span class="c_punctuation">(</span><a class="link" href="VipsImage.html#VipsStartFn" title="VipsStartFn ()">*VipsStartFn</a><span class="c_punctuation">)</span> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">int</span>
</td>
<td class="function_name">
<span class="c_punctuation">(</span><a class="link" href="VipsImage.html#VipsGenerateFn" title="VipsGenerateFn ()">*VipsGenerateFn</a><span class="c_punctuation">)</span> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">int</span>
</td>
<td class="function_name">
<span class="c_punctuation">(</span><a class="link" href="VipsImage.html#VipsStopFn" title="VipsStopFn ()">*VipsStopFn</a><span class="c_punctuation">)</span> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="define_keyword">#define</td>
<td class="function_name">
<a class="link" href="VipsImage.html#VIPS-IMAGE-SIZEOF-ELEMENT:CAPS" title="VIPS_IMAGE_SIZEOF_ELEMENT()">VIPS_IMAGE_SIZEOF_ELEMENT</a><span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="define_keyword">#define</td>
<td class="function_name">
<a class="link" href="VipsImage.html#VIPS-IMAGE-SIZEOF-PEL:CAPS" title="VIPS_IMAGE_SIZEOF_PEL()">VIPS_IMAGE_SIZEOF_PEL</a><span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="define_keyword">#define</td>
<td class="function_name">
<a class="link" href="VipsImage.html#VIPS-IMAGE-SIZEOF-LINE:CAPS" title="VIPS_IMAGE_SIZEOF_LINE()">VIPS_IMAGE_SIZEOF_LINE</a><span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="define_keyword">#define</td>
<td class="function_name">
<a class="link" href="VipsImage.html#VIPS-IMAGE-N-ELEMENTS:CAPS" title="VIPS_IMAGE_N_ELEMENTS()">VIPS_IMAGE_N_ELEMENTS</a><span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="define_keyword">#define</td>
<td class="function_name">
<a class="link" href="VipsImage.html#VIPS-IMAGE-N-PELS:CAPS" title="VIPS_IMAGE_N_PELS()">VIPS_IMAGE_N_PELS</a><span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="define_keyword">#define</td>
<td class="function_name">
<a class="link" href="VipsImage.html#VIPS-IMAGE-ADDR:CAPS" title="VIPS_IMAGE_ADDR()">VIPS_IMAGE_ADDR</a><span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="define_keyword">#define</td>
<td class="function_name">
<a class="link" href="VipsImage.html#VIPS-MATRIX:CAPS" title="VIPS_MATRIX()">VIPS_MATRIX</a><span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="VipsImage.html#vips-progress-set" title="vips_progress_set ()">vips_progress_set</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="VipsImage.html#vips-image-invalidate-all" title="vips_image_invalidate_all ()">vips_image_invalidate_all</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="VipsImage.html#vips-image-minimise-all" title="vips_image_minimise_all ()">vips_image_minimise_all</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="VipsImage.html#vips-image-set-progress" title="vips_image_set_progress ()">vips_image_set_progress</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">char</span> *
</td>
<td class="function_name">
<a class="link" href="VipsImage.html#vips-filename-get-filename" title="vips_filename_get_filename ()">vips_filename_get_filename</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">char</span> *
</td>
<td class="function_name">
<a class="link" href="VipsImage.html#vips-filename-get-options" title="vips_filename_get_options ()">vips_filename_get_options</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="VipsImage.html" title="VipsImage"><span class="returnvalue">VipsImage</span></a> *
</td>
<td class="function_name">
<a class="link" href="VipsImage.html#vips-image-new" title="vips_image_new ()">vips_image_new</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="VipsImage.html" title="VipsImage"><span class="returnvalue">VipsImage</span></a> *
</td>
<td class="function_name">
<a class="link" href="VipsImage.html#vips-image-new-memory" title="vips_image_new_memory ()">vips_image_new_memory</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="VipsImage.html" title="VipsImage"><span class="returnvalue">VipsImage</span></a> *
</td>
<td class="function_name">
<a class="link" href="VipsImage.html#vips-image-memory" title="vips_image_memory ()">vips_image_memory</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="VipsImage.html" title="VipsImage"><span class="returnvalue">VipsImage</span></a> *
</td>
<td class="function_name">
<a class="link" href="VipsImage.html#vips-image-new-from-file" title="vips_image_new_from_file ()">vips_image_new_from_file</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="VipsImage.html" title="VipsImage"><span class="returnvalue">VipsImage</span></a> *
</td>
<td class="function_name">
<a class="link" href="VipsImage.html#vips-image-new-from-file-RW" title="vips_image_new_from_file_RW ()">vips_image_new_from_file_RW</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="VipsImage.html" title="VipsImage"><span class="returnvalue">VipsImage</span></a> *
</td>
<td class="function_name">
<a class="link" href="VipsImage.html#vips-image-new-from-file-raw" title="vips_image_new_from_file_raw ()">vips_image_new_from_file_raw</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="VipsImage.html" title="VipsImage"><span class="returnvalue">VipsImage</span></a> *
</td>
<td class="function_name">
<a class="link" href="VipsImage.html#vips-image-new-from-memory" title="vips_image_new_from_memory ()">vips_image_new_from_memory</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="VipsImage.html" title="VipsImage"><span class="returnvalue">VipsImage</span></a> *
</td>
<td class="function_name">
<a class="link" href="VipsImage.html#vips-image-new-from-memory-copy" title="vips_image_new_from_memory_copy ()">vips_image_new_from_memory_copy</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="VipsImage.html" title="VipsImage"><span class="returnvalue">VipsImage</span></a> *
</td>
<td class="function_name">
<a class="link" href="VipsImage.html#vips-image-new-from-buffer" title="vips_image_new_from_buffer ()">vips_image_new_from_buffer</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="VipsImage.html" title="VipsImage"><span class="returnvalue">VipsImage</span></a> *
</td>
<td class="function_name">
<a class="link" href="VipsImage.html#vips-image-new-matrix" title="vips_image_new_matrix ()">vips_image_new_matrix</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="VipsImage.html" title="VipsImage"><span class="returnvalue">VipsImage</span></a> *
</td>
<td class="function_name">
<a class="link" href="VipsImage.html#vips-image-new-matrixv" title="vips_image_new_matrixv ()">vips_image_new_matrixv</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="VipsImage.html" title="VipsImage"><span class="returnvalue">VipsImage</span></a> *
</td>
<td class="function_name">
<a class="link" href="VipsImage.html#vips-image-new-matrix-from-array" title="vips_image_new_matrix_from_array ()">vips_image_new_matrix_from_array</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="VipsImage.html" title="VipsImage"><span class="returnvalue">VipsImage</span></a> *
</td>
<td class="function_name">
<a class="link" href="VipsImage.html#vips-image-matrix-from-array" title="vips_image_matrix_from_array ()">vips_image_matrix_from_array</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="VipsImage.html#vips-image-set-delete-on-close" title="vips_image_set_delete_on_close ()">vips_image_set_delete_on_close</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">guint64</span>
</td>
<td class="function_name">
<a class="link" href="VipsImage.html#vips-get-disc-threshold" title="vips_get_disc_threshold ()">vips_get_disc_threshold</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="VipsImage.html" title="VipsImage"><span class="returnvalue">VipsImage</span></a> *
</td>
<td class="function_name">
<a class="link" href="VipsImage.html#vips-image-new-temp-file" title="vips_image_new_temp_file ()">vips_image_new_temp_file</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">int</span>
</td>
<td class="function_name">
<a class="link" href="VipsImage.html#vips-image-write" title="vips_image_write ()">vips_image_write</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">int</span>
</td>
<td class="function_name">
<a class="link" href="VipsImage.html#vips-image-write-to-file" title="vips_image_write_to_file ()">vips_image_write_to_file</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">int</span>
</td>
<td class="function_name">
<a class="link" href="VipsImage.html#vips-image-write-to-buffer" title="vips_image_write_to_buffer ()">vips_image_write_to_buffer</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span> *
</td>
<td class="function_name">
<a class="link" href="VipsImage.html#vips-image-write-to-memory" title="vips_image_write_to_memory ()">vips_image_write_to_memory</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">int</span>
</td>
<td class="function_name">
<a class="link" href="VipsImage.html#vips-image-decode-predict" title="vips_image_decode_predict ()">vips_image_decode_predict</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">int</span>
</td>
<td class="function_name">
<a class="link" href="VipsImage.html#vips-image-decode" title="vips_image_decode ()">vips_image_decode</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">int</span>
</td>
<td class="function_name">
<a class="link" href="VipsImage.html#vips-image-encode" title="vips_image_encode ()">vips_image_encode</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">gboolean</span>
</td>
<td class="function_name">
<a class="link" href="VipsImage.html#vips-image-isMSBfirst" title="vips_image_isMSBfirst ()">vips_image_isMSBfirst</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">gboolean</span>
</td>
<td class="function_name">
<a class="link" href="VipsImage.html#vips-image-isfile" title="vips_image_isfile ()">vips_image_isfile</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">gboolean</span>
</td>
<td class="function_name">
<a class="link" href="VipsImage.html#vips-image-ispartial" title="vips_image_ispartial ()">vips_image_ispartial</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="VipsImage.html" title="VipsImage"><span class="returnvalue">VipsImage</span></a> *
</td>
<td class="function_name">
<a class="link" href="VipsImage.html#vips-image-copy-memory" title="vips_image_copy_memory ()">vips_image_copy_memory</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">int</span>
</td>
<td class="function_name">
<a class="link" href="VipsImage.html#vips-image-wio-input" title="vips_image_wio_input ()">vips_image_wio_input</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">int</span>
</td>
<td class="function_name">
<a class="link" href="VipsImage.html#vips-image-pio-input" title="vips_image_pio_input ()">vips_image_pio_input</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">int</span>
</td>
<td class="function_name">
<a class="link" href="VipsImage.html#vips-image-pio-output" title="vips_image_pio_output ()">vips_image_pio_output</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">int</span>
</td>
<td class="function_name">
<a class="link" href="VipsImage.html#vips-image-inplace" title="vips_image_inplace ()">vips_image_inplace</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">int</span>
</td>
<td class="function_name">
<a class="link" href="VipsImage.html#vips-image-write-prepare" title="vips_image_write_prepare ()">vips_image_write_prepare</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">int</span>
</td>
<td class="function_name">
<a class="link" href="VipsImage.html#vips-image-write-line" title="vips_image_write_line ()">vips_image_write_line</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">gboolean</span>
</td>
<td class="function_name">
<a class="link" href="VipsImage.html#vips-band-format-isint" title="vips_band_format_isint ()">vips_band_format_isint</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">gboolean</span>
</td>
<td class="function_name">
<a class="link" href="VipsImage.html#vips-band-format-isuint" title="vips_band_format_isuint ()">vips_band_format_isuint</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">gboolean</span>
</td>
<td class="function_name">
<a class="link" href="VipsImage.html#vips-band-format-is8bit" title="vips_band_format_is8bit ()">vips_band_format_is8bit</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">gboolean</span>
</td>
<td class="function_name">
<a class="link" href="VipsImage.html#vips-band-format-isfloat" title="vips_band_format_isfloat ()">vips_band_format_isfloat</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">gboolean</span>
</td>
<td class="function_name">
<a class="link" href="VipsImage.html#vips-band-format-iscomplex" title="vips_band_format_iscomplex ()">vips_band_format_iscomplex</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">int</span>
</td>
<td class="function_name">
<a class="link" href="VipsImage.html#vips-system" title="vips_system ()">vips_system</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="libvips-type.html#VipsArrayImage"><span class="returnvalue">VipsArrayImage</span></a> *
</td>
<td class="function_name">
<a class="link" href="VipsImage.html#vips-array-image-new" title="vips_array_image_new ()">vips_array_image_new</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="libvips-type.html#VipsArrayImage"><span class="returnvalue">VipsArrayImage</span></a> *
</td>
<td class="function_name">
<a class="link" href="VipsImage.html#vips-array-image-newv" title="vips_array_image_newv ()">vips_array_image_newv</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="libvips-type.html#VipsArrayImage"><span class="returnvalue">VipsArrayImage</span></a> *
</td>
<td class="function_name">
<a class="link" href="VipsImage.html#vips-array-image-new-from-string" title="vips_array_image_new_from_string ()">vips_array_image_new_from_string</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="libvips-type.html#VipsArrayImage"><span class="returnvalue">VipsArrayImage</span></a> *
</td>
<td class="function_name">
<a class="link" href="VipsImage.html#vips-array-image-empty" title="vips_array_image_empty ()">vips_array_image_empty</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="libvips-type.html#VipsArrayImage"><span class="returnvalue">VipsArrayImage</span></a> *
</td>
<td class="function_name">
<a class="link" href="VipsImage.html#vips-array-image-append" title="vips_array_image_append ()">vips_array_image_append</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="VipsImage.html" title="VipsImage"><span class="returnvalue">VipsImage</span></a> **
</td>
<td class="function_name">
<a class="link" href="VipsImage.html#vips-array-image-get" title="vips_array_image_get ()">vips_array_image_get</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="VipsImage.html" title="VipsImage"><span class="returnvalue">VipsImage</span></a> **
</td>
<td class="function_name">
<a class="link" href="VipsImage.html#vips-value-get-array-image" title="vips_value_get_array_image ()">vips_value_get_array_image</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="VipsImage.html#vips-value-set-array-image" title="vips_value_set_array_image ()">vips_value_set_array_image</a> <span class="c_punctuation">()</span>
</td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect1">
<a name="VipsImage.properties"></a><h2>Properties</h2>
<div class="informaltable"><table class="informaltable" border="0">
<colgroup>
<col width="150px" class="properties_type">
<col width="300px" class="properties_name">
<col width="200px" class="properties_flags">
</colgroup>
<tbody>
<tr>
<td class="property_type"><span class="type">gint</span></td>
<td class="property_name"><a class="link" href="VipsImage.html#VipsImage--bands" title="The “bands” property">bands</a></td>
<td class="property_flags">Read / Write</td>
</tr>
<tr>
<td class="property_type"><a class="link" href="VipsImage.html#VipsCoding" title="enum VipsCoding"><span class="type">VipsCoding</span></a></td>
<td class="property_name"><a class="link" href="VipsImage.html#VipsImage--coding" title="The “coding” property">coding</a></td>
<td class="property_flags">Read / Write</td>
</tr>
<tr>
<td class="property_type"><a class="link" href="VipsImage.html#VipsDemandStyle" title="enum VipsDemandStyle"><span class="type">VipsDemandStyle</span></a></td>
<td class="property_name"><a class="link" href="VipsImage.html#VipsImage--demand" title="The “demand” property">demand</a></td>
<td class="property_flags">Read / Write</td>
</tr>
<tr>
<td class="property_type">
<span class="type">gchar</span> *</td>
<td class="property_name"><a class="link" href="VipsImage.html#VipsImage--filename" title="The “filename” property">filename</a></td>
<td class="property_flags">Read / Write</td>
</tr>
<tr>
<td class="property_type"><span class="type">gpointer</span></td>
<td class="property_name"><a class="link" href="VipsImage.html#VipsImage--foreign-buffer" title="The “foreign-buffer” property">foreign-buffer</a></td>
<td class="property_flags">Read / Write</td>
</tr>
<tr>
<td class="property_type"><a class="link" href="VipsImage.html#VipsBandFormat" title="enum VipsBandFormat"><span class="type">VipsBandFormat</span></a></td>
<td class="property_name"><a class="link" href="VipsImage.html#VipsImage--format" title="The “format” property">format</a></td>
<td class="property_flags">Read / Write</td>
</tr>
<tr>
<td class="property_type"><span class="type">gint</span></td>
<td class="property_name"><a class="link" href="VipsImage.html#VipsImage--height" title="The “height” property">height</a></td>
<td class="property_flags">Read / Write</td>
</tr>
<tr>
<td class="property_type"><a class="link" href="VipsImage.html#VipsInterpretation" title="enum VipsInterpretation"><span class="type">VipsInterpretation</span></a></td>
<td class="property_name"><a class="link" href="VipsImage.html#VipsImage--interpretation" title="The “interpretation” property">interpretation</a></td>
<td class="property_flags">Read / Write</td>
</tr>
<tr>
<td class="property_type"><span class="type">gboolean</span></td>
<td class="property_name"><a class="link" href="VipsImage.html#VipsImage--kill" title="The “kill” property">kill</a></td>
<td class="property_flags">Read / Write</td>
</tr>
<tr>
<td class="property_type">
<span class="type">gchar</span> *</td>
<td class="property_name"><a class="link" href="VipsImage.html#VipsImage--mode" title="The “mode” property">mode</a></td>
<td class="property_flags">Read / Write</td>
</tr>
<tr>
<td class="property_type"><span class="type">guint64</span></td>
<td class="property_name"><a class="link" href="VipsImage.html#VipsImage--sizeof-header" title="The “sizeof-header” property">sizeof-header</a></td>
<td class="property_flags">Read / Write</td>
</tr>
<tr>
<td class="property_type"><span class="type">gint</span></td>
<td class="property_name"><a class="link" href="VipsImage.html#VipsImage--width" title="The “width” property">width</a></td>
<td class="property_flags">Read / Write</td>
</tr>
<tr>
<td class="property_type"><span class="type">gint</span></td>
<td class="property_name"><a class="link" href="VipsImage.html#VipsImage--xoffset" title="The “xoffset” property">xoffset</a></td>
<td class="property_flags">Read / Write</td>
</tr>
<tr>
<td class="property_type"><span class="type">gdouble</span></td>
<td class="property_name"><a class="link" href="VipsImage.html#VipsImage--xres" title="The “xres” property">xres</a></td>
<td class="property_flags">Read / Write</td>
</tr>
<tr>
<td class="property_type"><span class="type">gint</span></td>
<td class="property_name"><a class="link" href="VipsImage.html#VipsImage--yoffset" title="The “yoffset” property">yoffset</a></td>
<td class="property_flags">Read / Write</td>
</tr>
<tr>
<td class="property_type"><span class="type">gdouble</span></td>
<td class="property_name"><a class="link" href="VipsImage.html#VipsImage--yres" title="The “yres” property">yres</a></td>
<td class="property_flags">Read / Write</td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect1">
<a name="VipsImage.signals"></a><h2>Signals</h2>
<div class="informaltable"><table class="informaltable" border="0">
<colgroup>
<col width="150px" class="signals_return">
<col width="300px" class="signals_name">
<col width="200px" class="signals_flags">
</colgroup>
<tbody>
<tr>
<td class="signal_type"><span class="returnvalue">void</span></td>
<td class="signal_name"><a class="link" href="VipsImage.html#VipsImage-eval" title="The “eval” signal">eval</a></td>
<td class="signal_flags">Run Last</td>
</tr>
<tr>
<td class="signal_type"><span class="returnvalue">void</span></td>
<td class="signal_name"><a class="link" href="VipsImage.html#VipsImage-invalidate" title="The “invalidate” signal">invalidate</a></td>
<td class="signal_flags">Action</td>
</tr>
<tr>
<td class="signal_type"><span class="returnvalue">void</span></td>
<td class="signal_name"><a class="link" href="VipsImage.html#VipsImage-minimise" title="The “minimise” signal">minimise</a></td>
<td class="signal_flags">Action</td>
</tr>
<tr>
<td class="signal_type"><span class="returnvalue">void</span></td>
<td class="signal_name"><a class="link" href="VipsImage.html#VipsImage-posteval" title="The “posteval” signal">posteval</a></td>
<td class="signal_flags">Run Last</td>
</tr>
<tr>
<td class="signal_type"><span class="returnvalue">void</span></td>
<td class="signal_name"><a class="link" href="VipsImage.html#VipsImage-preeval" title="The “preeval” signal">preeval</a></td>
<td class="signal_flags">Run Last</td>
</tr>
<tr>
<td class="signal_type"><span class="returnvalue">void</span></td>
<td class="signal_name"><a class="link" href="VipsImage.html#VipsImage-written" title="The “written” signal">written</a></td>
<td class="signal_flags">Action</td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect1">
<a name="VipsImage.other"></a><h2>Types and Values</h2>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="name">
<col class="description">
</colgroup>
<tbody>
<tr>
<td class="define_keyword">#define</td>
<td class="function_name"><a class="link" href="VipsImage.html#VIPS-MAGIC-INTEL:CAPS" title="VIPS_MAGIC_INTEL">VIPS_MAGIC_INTEL</a></td>
</tr>
<tr>
<td class="define_keyword">#define</td>
<td class="function_name"><a class="link" href="VipsImage.html#VIPS-MAGIC-SPARC:CAPS" title="VIPS_MAGIC_SPARC">VIPS_MAGIC_SPARC</a></td>
</tr>
<tr>
<td class="define_keyword">#define</td>
<td class="function_name"><a class="link" href="VipsImage.html#VIPS-MAX-COORD:CAPS" title="VIPS_MAX_COORD">VIPS_MAX_COORD</a></td>
</tr>
<tr>
<td class="datatype_keyword">enum</td>
<td class="function_name"><a class="link" href="VipsImage.html#VipsDemandStyle" title="enum VipsDemandStyle">VipsDemandStyle</a></td>
</tr>
<tr>
<td class="datatype_keyword">enum</td>
<td class="function_name"><a class="link" href="VipsImage.html#VipsImageType" title="enum VipsImageType">VipsImageType</a></td>
</tr>
<tr>
<td class="datatype_keyword">enum</td>
<td class="function_name"><a class="link" href="VipsImage.html#VipsInterpretation" title="enum VipsInterpretation">VipsInterpretation</a></td>
</tr>
<tr>
<td class="datatype_keyword">enum</td>
<td class="function_name"><a class="link" href="VipsImage.html#VipsBandFormat" title="enum VipsBandFormat">VipsBandFormat</a></td>
</tr>
<tr>
<td class="datatype_keyword">enum</td>
<td class="function_name"><a class="link" href="VipsImage.html#VipsCoding" title="enum VipsCoding">VipsCoding</a></td>
</tr>
<tr>
<td class="datatype_keyword">enum</td>
<td class="function_name"><a class="link" href="VipsImage.html#VipsAccess" title="enum VipsAccess">VipsAccess</a></td>
</tr>
<tr>
<td class="datatype_keyword"> </td>
<td class="function_name"><a class="link" href="VipsImage.html#VipsProgress" title="VipsProgress">VipsProgress</a></td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect1">
<a name="VipsImage.object-hierarchy"></a><h2>Object Hierarchy</h2>
<pre class="screen"> GObject
<span class="lineart">╰──</span> <a class="link" href="VipsObject.html" title="VipsObject">VipsObject</a>
<span class="lineart">╰──</span> VipsImage
</pre>
</div>
<div class="refsect1">
<a name="VipsImage.includes"></a><h2>Includes</h2>
<pre class="synopsis">#include <vips/vips.h>
</pre>
</div>
<div class="refsect1">
<a name="VipsImage.description"></a><h2>Description</h2>
<p>The image class and associated types and macros.</p>
<p>Images can be created from formatted files on disc, from C-style arrays on
disc, from formatted areas of memory, or from C-style arrays in memory. See
<a class="link" href="VipsImage.html#vips-image-new-from-file" title="vips_image_new_from_file ()"><code class="function">vips_image_new_from_file()</code></a> and friends.
Creating an image is fast. VIPS reads just enough of
the image to be able to get the various properties, such as width in
pixels. It delays reading any pixels until they are really needed.</p>
<p>Once you have an image, you can get properties from it in the usual way.
You can use projection functions, like <a class="link" href="libvips-header.html#vips-image-get-width" title="vips_image_get_width ()"><code class="function">vips_image_get_width()</code></a> or
<code class="function">g_object_get()</code>, to get <code class="literal">GObject</code> properties. </p>
<p>VIPS images are three-dimensional arrays, the dimensions being width,
height and bands. Each dimension can be up to 2 ** 31 pixels (or band
elements). An image has a format, meaning the machine number type used
to represent each value. VIPS supports 10 formats, from 8-bit unsigned
integer up to 128-bit double complex, see <a class="link" href="libvips-header.html#vips-image-get-format" title="vips_image_get_format ()"><code class="function">vips_image_get_format()</code></a>. </p>
<p>In VIPS, images are uninterpreted arrays, meaning that from the point of
view of most operations, they are just large collections of numbers.
There's no difference between an RGBA (RGB with alpha) image and a CMYK
image, for example, they are both just four-band images. It's up to the
user of the library to pass the right sort of image to each operation. </p>
<p>To take an example, VIPS has <a class="link" href="libvips-colour.html#vips-Lab2XYZ" title="vips_Lab2XYZ ()"><code class="function">vips_Lab2XYZ()</code></a>, an operation to transform
an image from CIE LAB colour space to CIE XYZ space. It assumes the
first three bands represent pixels in LAB colour space and returns an
image where the first three bands are transformed to XYZ and any
remaining bands are just copied. Pass it a RGB image by mistake and
you'll just get nonsense.</p>
<p>VIPS has a feature to help (a little) with this: it sets a
<a class="link" href="VipsImage.html#VipsInterpretation" title="enum VipsInterpretation"><span class="type">VipsInterpretation</span></a> hint for each image (see
<a class="link" href="libvips-header.html#vips-image-get-interpretation" title="vips_image_get_interpretation ()"><code class="function">vips_image_get_interpretation()</code></a>); a hint which says how pixels should
be interpreted. For example, <a class="link" href="libvips-colour.html#vips-Lab2XYZ" title="vips_Lab2XYZ ()"><code class="function">vips_Lab2XYZ()</code></a> will set the
interpretation of the output image to <a class="link" href="VipsImage.html#VIPS-INTERPRETATION-XYZ:CAPS"><span class="type">VIPS_INTERPRETATION_XYZ</span></a>. A
few utility operations will also use interpretation as a guide. For
example, you can give <a class="link" href="libvips-colour.html#vips-colourspace" title="vips_colourspace ()"><code class="function">vips_colourspace()</code></a> an input image and a desired
colourspace and it will use the input's interpretation hint to apply
the best sequence of colourspace transforms to get to the desired space.</p>
<p>Use things like <a class="link" href="libvips-arithmetic.html#vips-invert" title="vips_invert ()"><code class="function">vips_invert()</code></a> to manipulate your images. When you are done,
you can write images to disc files (with <a class="link" href="VipsImage.html#vips-image-write-to-file" title="vips_image_write_to_file ()"><code class="function">vips_image_write_to_file()</code></a>),
to formatted memory buffers (with <a class="link" href="VipsImage.html#vips-image-write-to-buffer" title="vips_image_write_to_buffer ()"><code class="function">vips_image_write_to_buffer()</code></a>) and to
C-style memory arrays (with <a class="link" href="VipsImage.html#vips-image-write-to-memory" title="vips_image_write_to_memory ()"><code class="function">vips_image_write_to_memory()</code></a>.</p>
<p>You can also write image to other images. Create, for example, a temporary
disc image with <a class="link" href="VipsImage.html#vips-image-new-temp-file" title="vips_image_new_temp_file ()"><code class="function">vips_image_new_temp_file()</code></a>, then write your image to that
with <a class="link" href="VipsImage.html#vips-image-write" title="vips_image_write ()"><code class="function">vips_image_write()</code></a>. You can create several other types of image and
write to them, see <a class="link" href="VipsImage.html#vips-image-new-memory" title="vips_image_new_memory ()"><code class="function">vips_image_new_memory()</code></a>, for example. </p>
<p>See <a class="link" href="VipsOperation.html" title="VipsOperation">operation</a> for an introduction to
running operations on images, see <a class="link" href="libvips-header.html" title="header">header</a> for getting and setting image
metadata. See <a class="link" href="VipsObject.html" title="VipsObject">object</a> for a discussion of
the lower levels.</p>
</div>
<div class="refsect1">
<a name="VipsImage.functions_details"></a><h2>Functions</h2>
<div class="refsect2">
<a name="VipsStartFn"></a><h3>VipsStartFn ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span> *
<span class="c_punctuation">(</span>*VipsStartFn<span class="c_punctuation">)</span> (<em class="parameter"><code><span class="type">struct _VipsImage</span> *out</code></em>,
<em class="parameter"><code><span class="type">void</span> *a</code></em>,
<em class="parameter"><code><span class="type">void</span> *b</code></em>);</pre>
<p>Start a new processing sequence for this generate function. This allocates
per-thread state, such as an input region.</p>
<p>See also: <a class="link" href="libvips-generate.html#vips-start-one" title="vips_start_one ()"><code class="function">vips_start_one()</code></a>, <a class="link" href="libvips-generate.html#vips-start-many" title="vips_start_many ()"><code class="function">vips_start_many()</code></a>.</p>
<div class="refsect3">
<a name="VipsStartFn.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>out</p></td>
<td class="parameter_description"><p>image being calculated</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>a</p></td>
<td class="parameter_description"><p>user data</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>b</p></td>
<td class="parameter_description"><p>user data</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="VipsStartFn.returns"></a><h4>Returns</h4>
<p> a new sequence value</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="VipsGenerateFn"></a><h3>VipsGenerateFn ()</h3>
<pre class="programlisting"><span class="returnvalue">int</span>
<span class="c_punctuation">(</span>*VipsGenerateFn<span class="c_punctuation">)</span> (<em class="parameter"><code><span class="type">struct _VipsRegion</span> *out</code></em>,
<em class="parameter"><code><span class="type">void</span> *seq</code></em>,
<em class="parameter"><code><span class="type">void</span> *a</code></em>,
<em class="parameter"><code><span class="type">void</span> *b</code></em>,
<em class="parameter"><code><span class="type">gboolean</span> *stop</code></em>);</pre>
<p>Fill <em class="parameter"><code>out->valid</code></em>
with pixels. <em class="parameter"><code>seq</code></em>
contains per-thread state, such as the
input regions. Set <em class="parameter"><code>stop</code></em>
to <code class="literal">TRUE</code> to stop processing. </p>
<p>See also: <a class="link" href="libvips-generate.html#vips-image-generate" title="vips_image_generate ()"><code class="function">vips_image_generate()</code></a>, <a class="link" href="libvips-generate.html#vips-stop-many" title="vips_stop_many ()"><code class="function">vips_stop_many()</code></a>.</p>
<div class="refsect3">
<a name="VipsGenerateFn.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>out</p></td>
<td class="parameter_description"><p><a class="link" href="VipsRegion.html" title="VipsRegion"><span class="type">VipsRegion</span></a> to fill</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>seq</p></td>
<td class="parameter_description"><p>sequence value</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>a</p></td>
<td class="parameter_description"><p>user data</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>b</p></td>
<td class="parameter_description"><p>user data</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>stop</p></td>
<td class="parameter_description"><p>set this to stop processing</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="VipsGenerateFn.returns"></a><h4>Returns</h4>
<p> 0 on success, -1 on error.</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="VipsStopFn"></a><h3>VipsStopFn ()</h3>
<pre class="programlisting"><span class="returnvalue">int</span>
<span class="c_punctuation">(</span>*VipsStopFn<span class="c_punctuation">)</span> (<em class="parameter"><code><span class="type">void</span> *seq</code></em>,
<em class="parameter"><code><span class="type">void</span> *a</code></em>,
<em class="parameter"><code><span class="type">void</span> *b</code></em>);</pre>
<p>Stop a processing sequence. This frees
per-thread state, such as an input region.</p>
<p>See also: <a class="link" href="libvips-generate.html#vips-stop-one" title="vips_stop_one ()"><code class="function">vips_stop_one()</code></a>, <a class="link" href="libvips-generate.html#vips-stop-many" title="vips_stop_many ()"><code class="function">vips_stop_many()</code></a>.</p>
<div class="refsect3">
<a name="VipsStopFn.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>seq</p></td>
<td class="parameter_description"><p>sequence value</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>a</p></td>
<td class="parameter_description"><p>user data</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>b</p></td>
<td class="parameter_description"><p>user data</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="VipsStopFn.returns"></a><h4>Returns</h4>
<p> 0 on success, -1 on error.</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="VIPS-IMAGE-SIZEOF-ELEMENT:CAPS"></a><h3>VIPS_IMAGE_SIZEOF_ELEMENT()</h3>
<pre class="programlisting">#define VIPS_IMAGE_SIZEOF_ELEMENT( I )</pre>
<div class="refsect3">
<a name="VIPS-IMAGE-SIZEOF-ELEMENT.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>I</p></td>
<td class="parameter_description"><p>a <a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="VIPS-IMAGE-SIZEOF-ELEMENT.returns"></a><h4>Returns</h4>
<p> <code class="function">sizeof()</code> a band element.</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="VIPS-IMAGE-SIZEOF-PEL:CAPS"></a><h3>VIPS_IMAGE_SIZEOF_PEL()</h3>
<pre class="programlisting">#define VIPS_IMAGE_SIZEOF_PEL( I )</pre>
<div class="refsect3">
<a name="VIPS-IMAGE-SIZEOF-PEL.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>I</p></td>
<td class="parameter_description"><p>a <a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="VIPS-IMAGE-SIZEOF-PEL.returns"></a><h4>Returns</h4>
<p> <code class="function">sizeof()</code> a pixel.</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="VIPS-IMAGE-SIZEOF-LINE:CAPS"></a><h3>VIPS_IMAGE_SIZEOF_LINE()</h3>
<pre class="programlisting">#define VIPS_IMAGE_SIZEOF_LINE( I )</pre>
<div class="refsect3">
<a name="VIPS-IMAGE-SIZEOF-LINE.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>I</p></td>
<td class="parameter_description"><p>a <a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="VIPS-IMAGE-SIZEOF-LINE.returns"></a><h4>Returns</h4>
<p> <code class="function">sizeof()</code> a scanline of pixels.</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="VIPS-IMAGE-N-ELEMENTS:CAPS"></a><h3>VIPS_IMAGE_N_ELEMENTS()</h3>
<pre class="programlisting">#define VIPS_IMAGE_N_ELEMENTS( I )</pre>
<div class="refsect3">
<a name="VIPS-IMAGE-N-ELEMENTS.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>I</p></td>
<td class="parameter_description"><p>a <a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="VIPS-IMAGE-N-ELEMENTS.returns"></a><h4>Returns</h4>
<p> The number of band elements in a scanline.</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="VIPS-IMAGE-N-PELS:CAPS"></a><h3>VIPS_IMAGE_N_PELS()</h3>
<pre class="programlisting">#define VIPS_IMAGE_N_PELS( I )</pre>
<div class="refsect3">
<a name="VIPS-IMAGE-N-PELS.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>I</p></td>
<td class="parameter_description"><p>a <a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="VIPS-IMAGE-N-PELS.returns"></a><h4>Returns</h4>
<p> The number of pels in an image. A 64-bit unsigned int.</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="VIPS-IMAGE-ADDR:CAPS"></a><h3>VIPS_IMAGE_ADDR()</h3>
<pre class="programlisting">#define VIPS_IMAGE_ADDR( I, X, Y )</pre>
<p>This macro returns a pointer to a pixel in an image, cast to a <a class="link" href="libvips-basic.html#VipsPel" title="VipsPel"><span class="type">VipsPel</span></a> *.
It only works for
images which are fully available in memory, so memory buffers and small
mapped images only.</p>
<p>If VIPS_DEBUG is defined, you get a version that checks bounds for you.</p>
<p>See also: <a class="link" href="VipsImage.html#vips-image-wio-input" title="vips_image_wio_input ()"><code class="function">vips_image_wio_input()</code></a>, <a class="link" href="VipsImage.html#vips-image-inplace" title="vips_image_inplace ()"><code class="function">vips_image_inplace()</code></a>, <a class="link" href="VipsRegion.html#VIPS-REGION-ADDR:CAPS" title="VIPS_REGION_ADDR()"><code class="function">VIPS_REGION_ADDR()</code></a>.</p>
<div class="refsect3">
<a name="VIPS-IMAGE-ADDR.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>I</p></td>
<td class="parameter_description"><p>a <a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>X</p></td>
<td class="parameter_description"><p>x coordinate</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>Y</p></td>
<td class="parameter_description"><p>y coordinate</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="VIPS-IMAGE-ADDR.returns"></a><h4>Returns</h4>
<p> The address of pixel (<em class="parameter"><code>X</code></em>
,<em class="parameter"><code>Y</code></em>
) in <em class="parameter"><code>I</code></em>
. </p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="VIPS-MATRIX:CAPS"></a><h3>VIPS_MATRIX()</h3>
<pre class="programlisting">#define VIPS_MATRIX( I, X, Y )</pre>
<p>This macro returns a pointer to a pixel in an image, cast to a double*. The
image must have a single band, be <a class="link" href="VipsImage.html#VIPS-FORMAT-DOUBLE:CAPS"><span class="type">VIPS_FORMAT_DOUBLE</span></a> and be
fully available in memory, so memory buffers and small
mapped images only.</p>
<p>If VIPS_DEBUG is defined, you get a version that checks bounds and image
type for you.</p>
<p>See also: <a class="link" href="VipsImage.html#vips-image-wio-input" title="vips_image_wio_input ()"><code class="function">vips_image_wio_input()</code></a>, <a class="link" href="VipsImage.html#vips-image-inplace" title="vips_image_inplace ()"><code class="function">vips_image_inplace()</code></a>, <a class="link" href="libvips-error.html#vips-check-matrix" title="vips_check_matrix ()"><code class="function">vips_check_matrix()</code></a>.</p>
<div class="refsect3">
<a name="VIPS-MATRIX.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>I</p></td>
<td class="parameter_description"><p>a <a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>X</p></td>
<td class="parameter_description"><p>x coordinate</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>Y</p></td>
<td class="parameter_description"><p>y coordinate</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="VIPS-MATRIX.returns"></a><h4>Returns</h4>
<p> The address of pixel (<em class="parameter"><code>X</code></em>
,<em class="parameter"><code>Y</code></em>
) in <em class="parameter"><code>I</code></em>
.</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="vips-progress-set"></a><h3>vips_progress_set ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
vips_progress_set (<em class="parameter"><code><span class="type">gboolean</span> progress</code></em>);</pre>
<p>If set, vips will print messages about the progress of computation to
stdout. This can also be enabled with the --vips-progress option, or by
setting the environment variable VIPS_PROGRESS.</p>
<div class="refsect3">
<a name="vips-progress-set.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>progress</p></td>
<td class="parameter_description"><p><code class="literal">TRUE</code> to enable progress messages</p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="vips-image-invalidate-all"></a><h3>vips_image_invalidate_all ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
vips_image_invalidate_all (<em class="parameter"><code><a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a> *image</code></em>);</pre>
<p>Invalidate all pixel caches on <em class="parameter"><code>image</code></em>
and any downstream images, that
is, images which depend on this image. Additionally, all operations which
depend upon this image are dropped from the VIPS operation cache. </p>
<p>You should call this function after
destructively modifying an image with something like <a class="link" href="libvips-draw.html#vips-draw-circle" title="vips_draw_circle ()"><code class="function">vips_draw_circle()</code></a>.</p>
<p>The <a class="link" href="VipsImage.html#VipsImage-invalidate" title="The “invalidate” signal"><span class="type">“invalidate”</span></a> signal is emitted for all invalidated images.</p>
<p>See also: <a class="link" href="VipsRegion.html#vips-region-invalidate" title="vips_region_invalidate ()"><code class="function">vips_region_invalidate()</code></a>.</p>
<div class="refsect3">
<a name="vips-image-invalidate-all.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>image</p></td>
<td class="parameter_description"><p><a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a> to invalidate</p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="vips-image-minimise-all"></a><h3>vips_image_minimise_all ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
vips_image_minimise_all (<em class="parameter"><code><a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a> *image</code></em>);</pre>
<p>Minimise memory use on this image and any upstream images, that is, images
which this image depends upon. This function is called automatically at the
end of a computation, but it might be useful to call at other times. </p>
<p>The <a class="link" href="VipsImage.html#VipsImage-minimise" title="The “minimise” signal"><span class="type">“minimise”</span></a> signal is emitted for all minimised images.</p>
<div class="refsect3">
<a name="vips-image-minimise-all.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>image</p></td>
<td class="parameter_description"><p><a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a> to minimise</p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="vips-image-set-progress"></a><h3>vips_image_set_progress ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
vips_image_set_progress (<em class="parameter"><code><a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a> *image</code></em>,
<em class="parameter"><code><span class="type">gboolean</span> progress</code></em>);</pre>
<p>vips signals evaluation progress via the <a class="link" href="VipsImage.html#VipsImage-preeval" title="The “preeval” signal"><span class="type">“preeval”</span></a>,
<a class="link" href="VipsImage.html#VipsImage-eval" title="The “eval” signal"><span class="type">“eval”</span></a> and <a class="link" href="VipsImage.html#VipsImage-posteval" title="The “posteval” signal"><span class="type">“posteval”</span></a>
signals. Progress is signalled on the most-downstream image for which
<a class="link" href="VipsImage.html#vips-image-set-progress" title="vips_image_set_progress ()"><code class="function">vips_image_set_progress()</code></a> was called.</p>
<div class="refsect3">
<a name="vips-image-set-progress.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>image</p></td>
<td class="parameter_description"><p>image to signal progress on</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>progress</p></td>
<td class="parameter_description"><p>turn progress reporting on or off</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="vips-filename-get-filename"></a><h3>vips_filename_get_filename ()</h3>
<pre class="programlisting"><span class="returnvalue">char</span> *
vips_filename_get_filename (<em class="parameter"><code>const <span class="type">char</span> *vips_filename</code></em>);</pre>
<p>Given a vips filename like "fred.jpg[Q=90]", return a new string of
just the filename part, "fred.jpg" in this case. </p>
<p>Useful for language bindings. </p>
<p>See also: <a class="link" href="VipsImage.html#vips-filename-get-options" title="vips_filename_get_options ()"><code class="function">vips_filename_get_options()</code></a>.</p>
<div class="refsect3">
<a name="vips-filename-get-filename.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>vips_filename</p></td>
<td class="parameter_description"><p>a filename including a set of options</p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="vips-filename-get-filename.returns"></a><h4>Returns</h4>
<p> transfer full: just the filename component.</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="vips-filename-get-options"></a><h3>vips_filename_get_options ()</h3>
<pre class="programlisting"><span class="returnvalue">char</span> *
vips_filename_get_options (<em class="parameter"><code>const <span class="type">char</span> *vips_filename</code></em>);</pre>
<p>Given a vips filename like "fred.jpg[Q=90]", return a new string of
just the options part, "[Q=90]" in this case. </p>
<p>Useful for language bindings. </p>
<p>See also: <a class="link" href="VipsImage.html#vips-filename-get-filename" title="vips_filename_get_filename ()"><code class="function">vips_filename_get_filename()</code></a>.</p>
<div class="refsect3">
<a name="vips-filename-get-options.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>vips_filename</p></td>
<td class="parameter_description"><p>a filename including a set of options</p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="vips-filename-get-options.returns"></a><h4>Returns</h4>
<p> transfer full: just the options component.</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="vips-image-new"></a><h3>vips_image_new ()</h3>
<pre class="programlisting"><a class="link" href="VipsImage.html" title="VipsImage"><span class="returnvalue">VipsImage</span></a> *
vips_image_new (<em class="parameter"><code><span class="type">void</span></code></em>);</pre>
<p>vips_image_new() creates a new, empty <a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a>.
If you write to one of these images, vips will just attach some callbacks,
no pixels will be generated. </p>
<p>Write pixels to an image with <a class="link" href="libvips-generate.html#vips-image-generate" title="vips_image_generate ()"><code class="function">vips_image_generate()</code></a> or
<a class="link" href="VipsImage.html#vips-image-write-line" title="vips_image_write_line ()"><code class="function">vips_image_write_line()</code></a>. Write a whole image to another image with
<a class="link" href="VipsImage.html#vips-image-write" title="vips_image_write ()"><code class="function">vips_image_write()</code></a>.</p>
<div class="refsect3">
<a name="vips-image-new.returns"></a><h4>Returns</h4>
<p> the new <a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a>, or <code class="literal">NULL</code> on error. </p>
<p><span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span></p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="vips-image-new-memory"></a><h3>vips_image_new_memory ()</h3>
<pre class="programlisting"><a class="link" href="VipsImage.html" title="VipsImage"><span class="returnvalue">VipsImage</span></a> *
vips_image_new_memory (<em class="parameter"><code><span class="type">void</span></code></em>);</pre>
<p>vips_image_new_memory() creates a new <a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a> which, when written to, will
create a memory image. </p>
<p>See also: <a class="link" href="VipsImage.html#vips-image-new" title="vips_image_new ()"><code class="function">vips_image_new()</code></a>.</p>
<div class="refsect3">
<a name="vips-image-new-memory.returns"></a><h4>Returns</h4>
<p> the new <a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a>, or <code class="literal">NULL</code> on error. </p>
<p><span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span></p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="vips-image-memory"></a><h3>vips_image_memory ()</h3>
<pre class="programlisting"><a class="link" href="VipsImage.html" title="VipsImage"><span class="returnvalue">VipsImage</span></a> *
vips_image_memory (<em class="parameter"><code><span class="type">void</span></code></em>);</pre>
<p>A renamed <a class="link" href="VipsImage.html#vips-image-new-memory" title="vips_image_new_memory ()"><code class="function">vips_image_new_memory()</code></a> ... Some gobject binding systems do not
like more than one <code class="function">_new()</code> method.</p>
<p>See also: <a class="link" href="VipsImage.html#vips-image-new-memory" title="vips_image_new_memory ()"><code class="function">vips_image_new_memory()</code></a>.</p>
<div class="refsect3">
<a name="vips-image-memory.returns"></a><h4>Returns</h4>
<p> the new <a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a>, or <code class="literal">NULL</code> on error. </p>
<p><span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span></p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="vips-image-new-from-file"></a><h3>vips_image_new_from_file ()</h3>
<pre class="programlisting"><a class="link" href="VipsImage.html" title="VipsImage"><span class="returnvalue">VipsImage</span></a> *
vips_image_new_from_file (<em class="parameter"><code>const <span class="type">char</span> *name</code></em>,
<em class="parameter"><code>...</code></em>);</pre>
<p>Optional arguments:</p>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem"><p><em class="parameter"><code>access</code></em>
: hint <a class="link" href="VipsImage.html#VipsAccess" title="enum VipsAccess"><span class="type">VipsAccess</span></a> mode to loader</p></li>
<li class="listitem"><p><em class="parameter"><code>disc</code></em>
: load via a temporary disc file</p></li>
</ul></div>
<p>vips_image_new_from_file() opens <em class="parameter"><code>name</code></em>
for reading. It can load files
in many image formats, including VIPS, TIFF, PNG, JPEG, FITS, Matlab,
OpenEXR, CSV, WebP, Radiance, RAW, PPM and others. </p>
<p>Load options may be appended to <em class="parameter"><code>filename</code></em>
as "[name=value,...]" or given as
a NULL-terminated list of name-value pairs at the end of the arguments.
Options given in the function call override options given in the filename.
Many loaders add extra options, see <a class="link" href="VipsForeignSave.html#vips-jpegload" title="vips_jpegload ()"><code class="function">vips_jpegload()</code></a>, for example. </p>
<p>vips_image_new_from_file() always returns immediately with the header
fields filled in. No pixels are actually read until you first access them. </p>
<p><em class="parameter"><code>access</code></em>
lets you set a <a class="link" href="VipsImage.html#VipsAccess" title="enum VipsAccess"><span class="type">VipsAccess</span></a> hint giving the expected access pattern
for this file.
<a class="link" href="VipsImage.html#VIPS-ACCESS-RANDOM:CAPS"><span class="type">VIPS_ACCESS_RANDOM</span></a> means you can fetch pixels randomly from the image.
This is the default mode. <a class="link" href="VipsImage.html#VIPS-ACCESS-SEQUENTIAL:CAPS"><span class="type">VIPS_ACCESS_SEQUENTIAL</span></a> means you will read the
whole image exactly once, top-to-bottom. In this mode, vips can avoid
converting the whole image in one go, for a large memory saving. You are
allowed to make small non-local references, so area operations like
convolution will work. <a class="link" href="VipsImage.html#VIPS-ACCESS-SEQUENTIAL-UNBUFFERED:CAPS"><span class="type">VIPS_ACCESS_SEQUENTIAL_UNBUFFERED</span></a> does not allow
non-local references, so will only work for very strict top-to-bottom
operations, but does have very low memory needs. </p>
<p>In <a class="link" href="VipsImage.html#VIPS-ACCESS-RANDOM:CAPS"><span class="type">VIPS_ACCESS_RANDOM</span></a> mode, small images are decompressed to memory and
then processed from there. Large images are decompressed to temporary
random-access files on disc and then processed from there. Set <em class="parameter"><code>disc</code></em>
to
<code class="literal">TRUE</code> to force loading via disc. See <a class="link" href="VipsImage.html#vips-image-new-temp-file" title="vips_image_new_temp_file ()"><code class="function">vips_image_new_temp_file()</code></a> for an
explanation of how VIPS selects a location for the temporary file.</p>
<p>The disc threshold can be set with the "--vips-disc-threshold"
command-line argument, or the VIPS_DISC_THRESHOLD environment variable.
The value is a simple integer, but can take a unit postfix of "k",
"m" or "g" to indicate kilobytes, megabytes or gigabytes.
The default threshold is 100 MB.</p>
<p>For example:</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</pre></td>
<td class="listing_code"><pre class="programlisting">VipsImage <span class="gtkdoc opt">*</span>image <span class="gtkdoc opt">=</span> <span class="function"><a href="VipsImage.html#vips-image-new-from-file">vips_image_new_from_file</a></span> <span class="gtkdoc opt">(</span><span class="string">"fred.tif"</span><span class="gtkdoc opt">,</span>
<span class="string">"page"</span><span class="gtkdoc opt">,</span> <span class="number">12</span><span class="gtkdoc opt">,</span>
NULL<span class="gtkdoc opt">);</span></pre></td>
</tr>
</tbody>
</table>
</div>
<p></p>
<p>Will open "fred.tif", reading page 12. </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</pre></td>
<td class="listing_code"><pre class="programlisting">VipsImage <span class="gtkdoc opt">*</span>image <span class="gtkdoc opt">=</span> <span class="function"><a href="VipsImage.html#vips-image-new-from-file">vips_image_new_from_file</a></span> <span class="gtkdoc opt">(</span><span class="string">"fred.jpg[shrink=2]"</span><span class="gtkdoc opt">,</span>
NULL<span class="gtkdoc opt">);</span></pre></td>
</tr>
</tbody>
</table>
</div>
<p></p>
<p>Will open "fred.jpg", downsampling by a factor of two. </p>
<p>Use <a class="link" href="VipsForeignSave.html#vips-foreign-find-load" title="vips_foreign_find_load ()"><code class="function">vips_foreign_find_load()</code></a> or <a class="link" href="VipsForeignSave.html#vips-foreign-is-a" title="vips_foreign_is_a ()"><code class="function">vips_foreign_is_a()</code></a> to see what format a
file is in and therefore what options are available. If you need more
control over the loading process, you can call loaders directly, see
<a class="link" href="VipsForeignSave.html#vips-jpegload" title="vips_jpegload ()"><code class="function">vips_jpegload()</code></a>, for example. </p>
<p>See also: <a class="link" href="VipsForeignSave.html#vips-foreign-find-load" title="vips_foreign_find_load ()"><code class="function">vips_foreign_find_load()</code></a>, <a class="link" href="VipsForeignSave.html#vips-foreign-is-a" title="vips_foreign_is_a ()"><code class="function">vips_foreign_is_a()</code></a>,
<a class="link" href="VipsImage.html#vips-image-write-to-file" title="vips_image_write_to_file ()"><code class="function">vips_image_write_to_file()</code></a>.</p>
<div class="refsect3">
<a name="vips-image-new-from-file.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>name</p></td>
<td class="parameter_description"><p>file to open</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>...</p></td>
<td class="parameter_description"><p><code class="literal">NULL</code>-terminated list of optional named arguments</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="vips-image-new-from-file.returns"></a><h4>Returns</h4>
<p> the new <a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a>, or <code class="literal">NULL</code> on error. </p>
<p><span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span></p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="vips-image-new-from-file-RW"></a><h3>vips_image_new_from_file_RW ()</h3>
<pre class="programlisting"><a class="link" href="VipsImage.html" title="VipsImage"><span class="returnvalue">VipsImage</span></a> *
vips_image_new_from_file_RW (<em class="parameter"><code>const <span class="type">char</span> *filename</code></em>);</pre>
<p>Opens the named file for simultaneous reading and writing. This will only
work for VIPS files in a format native to your machine. It is only for
paintbox-type applications.</p>
<p>See also: <a class="link" href="libvips-draw.html#vips-draw-circle" title="vips_draw_circle ()"><code class="function">vips_draw_circle()</code></a>.</p>
<div class="refsect3">
<a name="vips-image-new-from-file-RW.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>filename</p></td>
<td class="parameter_description"><p>filename to open</p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="vips-image-new-from-file-RW.returns"></a><h4>Returns</h4>
<p> the new <a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a>, or <code class="literal">NULL</code> on error. </p>
<p><span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span></p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="vips-image-new-from-file-raw"></a><h3>vips_image_new_from_file_raw ()</h3>
<pre class="programlisting"><a class="link" href="VipsImage.html" title="VipsImage"><span class="returnvalue">VipsImage</span></a> *
vips_image_new_from_file_raw (<em class="parameter"><code>const <span class="type">char</span> *filename</code></em>,
<em class="parameter"><code><span class="type">int</span> xsize</code></em>,
<em class="parameter"><code><span class="type">int</span> ysize</code></em>,
<em class="parameter"><code><span class="type">int</span> bands</code></em>,
<em class="parameter"><code><span class="type">guint64</span> offset</code></em>);</pre>
<p>This function maps the named file and returns a <a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a> you can use to
read it.</p>
<p>It returns an 8-bit image with <em class="parameter"><code>bands</code></em>
bands. If the image is not 8-bit, use
<a class="link" href="libvips-conversion.html#vips-copy" title="vips_copy ()"><code class="function">vips_copy()</code></a> to transform the descriptor after loading it.</p>
<p>See also: <a class="link" href="libvips-conversion.html#vips-copy" title="vips_copy ()"><code class="function">vips_copy()</code></a>, <a class="link" href="VipsForeignSave.html#vips-rawload" title="vips_rawload ()"><code class="function">vips_rawload()</code></a>, <a class="link" href="VipsImage.html#vips-image-new-from-file" title="vips_image_new_from_file ()"><code class="function">vips_image_new_from_file()</code></a>.</p>
<div class="refsect3">
<a name="vips-image-new-from-file-raw.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>filename</p></td>
<td class="parameter_description"><p>filename to open</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>xsize</p></td>
<td class="parameter_description"><p>image width</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>ysize</p></td>
<td class="parameter_description"><p>image height</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>bands</p></td>
<td class="parameter_description"><p>image bands (or bytes per pixel)</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>offset</p></td>
<td class="parameter_description"><p>bytes to skip at start of file</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="vips-image-new-from-file-raw.returns"></a><h4>Returns</h4>
<p> the new <a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a>, or <code class="literal">NULL</code> on error. </p>
<p><span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span></p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="vips-image-new-from-memory"></a><h3>vips_image_new_from_memory ()</h3>
<pre class="programlisting"><a class="link" href="VipsImage.html" title="VipsImage"><span class="returnvalue">VipsImage</span></a> *
vips_image_new_from_memory (<em class="parameter"><code>const <span class="type">void</span> *data</code></em>,
<em class="parameter"><code><span class="type">size_t</span> size</code></em>,
<em class="parameter"><code><span class="type">int</span> width</code></em>,
<em class="parameter"><code><span class="type">int</span> height</code></em>,
<em class="parameter"><code><span class="type">int</span> bands</code></em>,
<em class="parameter"><code><a class="link" href="VipsImage.html#VipsBandFormat" title="enum VipsBandFormat"><span class="type">VipsBandFormat</span></a> format</code></em>);</pre>
<p>This function wraps a <a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a> around a memory area. The memory area
must be a simple array, for example RGBRGBRGB, left-to-right,
top-to-bottom. Use <a class="link" href="VipsImage.html#vips-image-new-from-buffer" title="vips_image_new_from_buffer ()"><code class="function">vips_image_new_from_buffer()</code></a> to load an area of memory
containing an image in a format.</p>
<p>VIPS does not take
responsibility for the area of memory, it's up to you to make sure it's
freed when the image is closed. See for example <a class="link" href="VipsObject.html#VipsObject-close" title="The “close” signal"><span class="type">“close”</span></a>.</p>
<p>Because VIPS is "borrowing" <em class="parameter"><code>data</code></em>
from the caller, this function is
extremely dangerous. Unless you are very careful, you will get crashes or
memory corruption. Use <a class="link" href="VipsImage.html#vips-image-new-from-memory-copy" title="vips_image_new_from_memory_copy ()"><code class="function">vips_image_new_from_memory_copy()</code></a> instead if you are
at all unsure. </p>
<p>Use <a class="link" href="libvips-conversion.html#vips-copy" title="vips_copy ()"><code class="function">vips_copy()</code></a> to set other image properties. </p>
<p>See also: <a class="link" href="VipsImage.html#vips-image-new" title="vips_image_new ()"><code class="function">vips_image_new()</code></a>, <a class="link" href="VipsImage.html#vips-image-write-to-memory" title="vips_image_write_to_memory ()"><code class="function">vips_image_write_to_memory()</code></a>,
<a class="link" href="VipsImage.html#vips-image-new-from-memory-copy" title="vips_image_new_from_memory_copy ()"><code class="function">vips_image_new_from_memory_copy()</code></a>.</p>
<div class="refsect3">
<a name="vips-image-new-from-memory.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>data</p></td>
<td class="parameter_description"><p> start of memory area. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter points to an array of items."><span class="acronym">array</span></acronym> length=size][<acronym title="Generics and defining elements of containers and arrays."><span class="acronym">element-type</span></acronym> guint8][<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>size</p></td>
<td class="parameter_description"><p>length of memory area</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>width</p></td>
<td class="parameter_description"><p>image width</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>height</p></td>
<td class="parameter_description"><p>image height</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>bands</p></td>
<td class="parameter_description"><p>image bands (or bytes per pixel)</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>format</p></td>
<td class="parameter_description"><p>image format</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="vips-image-new-from-memory.returns"></a><h4>Returns</h4>
<p> the new <a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a>, or <code class="literal">NULL</code> on error. </p>
<p><span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span></p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="vips-image-new-from-memory-copy"></a><h3>vips_image_new_from_memory_copy ()</h3>
<pre class="programlisting"><a class="link" href="VipsImage.html" title="VipsImage"><span class="returnvalue">VipsImage</span></a> *
vips_image_new_from_memory_copy (<em class="parameter"><code>const <span class="type">void</span> *data</code></em>,
<em class="parameter"><code><span class="type">size_t</span> size</code></em>,
<em class="parameter"><code><span class="type">int</span> width</code></em>,
<em class="parameter"><code><span class="type">int</span> height</code></em>,
<em class="parameter"><code><span class="type">int</span> bands</code></em>,
<em class="parameter"><code><a class="link" href="VipsImage.html#VipsBandFormat" title="enum VipsBandFormat"><span class="type">VipsBandFormat</span></a> format</code></em>);</pre>
<p>Like <a class="link" href="VipsImage.html#vips-image-new-from-memory" title="vips_image_new_from_memory ()"><code class="function">vips_image_new_from_memory()</code></a>, but VIPS will make a copy of the memory
area. This
means more memory use and an extra copy operation, but is much simpler and
safer. </p>
<p>See also: <a class="link" href="VipsImage.html#vips-image-new-from-memory" title="vips_image_new_from_memory ()"><code class="function">vips_image_new_from_memory()</code></a>.</p>
<div class="refsect3">
<a name="vips-image-new-from-memory-copy.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>data</p></td>
<td class="parameter_description"><p> start of memory area. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter points to an array of items."><span class="acronym">array</span></acronym> length=size][<acronym title="Generics and defining elements of containers and arrays."><span class="acronym">element-type</span></acronym> guint8][<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>size</p></td>
<td class="parameter_description"><p>length of memory area</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>width</p></td>
<td class="parameter_description"><p>image width</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>height</p></td>
<td class="parameter_description"><p>image height</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>bands</p></td>
<td class="parameter_description"><p>image bands (or bytes per pixel)</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>format</p></td>
<td class="parameter_description"><p>image format</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="vips-image-new-from-memory-copy.returns"></a><h4>Returns</h4>
<p> the new <a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a>, or <code class="literal">NULL</code> on error. </p>
<p><span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span></p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="vips-image-new-from-buffer"></a><h3>vips_image_new_from_buffer ()</h3>
<pre class="programlisting"><a class="link" href="VipsImage.html" title="VipsImage"><span class="returnvalue">VipsImage</span></a> *
vips_image_new_from_buffer (<em class="parameter"><code>const <span class="type">void</span> *buf</code></em>,
<em class="parameter"><code><span class="type">size_t</span> len</code></em>,
<em class="parameter"><code>const <span class="type">char</span> *option_string</code></em>,
<em class="parameter"><code>...</code></em>);</pre>
<p>Loads an image from the formatted area of memory <em class="parameter"><code>buf</code></em>
, <em class="parameter"><code>len</code></em>
using the
loader recommended by <a class="link" href="VipsForeignSave.html#vips-foreign-find-load-buffer" title="vips_foreign_find_load_buffer ()"><code class="function">vips_foreign_find_load_buffer()</code></a>.
To load an unformatted area of memory, use
<a class="link" href="VipsImage.html#vips-image-new-from-memory" title="vips_image_new_from_memory ()"><code class="function">vips_image_new_from_memory()</code></a>. </p>
<p>VIPS does not take
responsibility for the area of memory, it's up to you to make sure it's
freed when the image is closed. See for example <a class="link" href="VipsObject.html#VipsObject-close" title="The “close” signal"><span class="type">“close”</span></a>.</p>
<p>Load options may be given in <em class="parameter"><code>option_string</code></em>
as "[name=value,...]" or given as
a NULL-terminated list of name-value pairs at the end of the arguments.
Options given in the function call override options given in the filename. </p>
<p>See also: <a class="link" href="VipsImage.html#vips-image-write-to-buffer" title="vips_image_write_to_buffer ()"><code class="function">vips_image_write_to_buffer()</code></a>.</p>
<div class="refsect3">
<a name="vips-image-new-from-buffer.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>buf</p></td>
<td class="parameter_description"><p> image data. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter points to an array of items."><span class="acronym">array</span></acronym> length=len][<acronym title="Generics and defining elements of containers and arrays."><span class="acronym">element-type</span></acronym> guint8][<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>len</p></td>
<td class="parameter_description"><p>length of memory buffer</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>option_string</p></td>
<td class="parameter_description"><p>set of extra options as a string</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>...</p></td>
<td class="parameter_description"><p><code class="literal">NULL</code>-terminated list of optional named arguments</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="vips-image-new-from-buffer.returns"></a><h4>Returns</h4>
<p> the new <a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a>, or <code class="literal">NULL</code> on error. </p>
<p><span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span></p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="vips-image-new-matrix"></a><h3>vips_image_new_matrix ()</h3>
<pre class="programlisting"><a class="link" href="VipsImage.html" title="VipsImage"><span class="returnvalue">VipsImage</span></a> *
vips_image_new_matrix (<em class="parameter"><code><span class="type">int</span> width</code></em>,
<em class="parameter"><code><span class="type">int</span> height</code></em>);</pre>
<p>This convenience function makes an image which is a matrix: a one-band
<a class="link" href="VipsImage.html#VIPS-FORMAT-DOUBLE:CAPS"><span class="type">VIPS_FORMAT_DOUBLE</span></a> image held in memory.</p>
<p>Use <a class="link" href="VipsImage.html#VIPS-IMAGE-ADDR:CAPS" title="VIPS_IMAGE_ADDR()"><code class="function">VIPS_IMAGE_ADDR()</code></a>, or <a class="link" href="VipsImage.html#VIPS-MATRIX:CAPS" title="VIPS_MATRIX()"><code class="function">VIPS_MATRIX()</code></a> to address pixels in the image.</p>
<p>Use <a class="link" href="libvips-header.html#vips-image-set-double" title="vips_image_set_double ()"><code class="function">vips_image_set_double()</code></a> to set "scale" and "offset", if required. </p>
<p>See also: <a class="link" href="VipsImage.html#vips-image-new-matrixv" title="vips_image_new_matrixv ()"><code class="function">vips_image_new_matrixv()</code></a></p>
<div class="refsect3">
<a name="vips-image-new-matrix.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>width</p></td>
<td class="parameter_description"><p>image width</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>height</p></td>
<td class="parameter_description"><p>image height</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="vips-image-new-matrix.returns"></a><h4>Returns</h4>
<p> the new <a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a>, or <code class="literal">NULL</code> on error. </p>
<p><span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span></p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="vips-image-new-matrixv"></a><h3>vips_image_new_matrixv ()</h3>
<pre class="programlisting"><a class="link" href="VipsImage.html" title="VipsImage"><span class="returnvalue">VipsImage</span></a> *
vips_image_new_matrixv (<em class="parameter"><code><span class="type">int</span> width</code></em>,
<em class="parameter"><code><span class="type">int</span> height</code></em>,
<em class="parameter"><code>...</code></em>);</pre>
<p>As <a class="link" href="VipsImage.html#vips-image-new-matrix" title="vips_image_new_matrix ()"><code class="function">vips_image_new_matrix()</code></a>, but initialise the matrix from the argument
list. After <em class="parameter"><code>height</code></em>
should be <em class="parameter"><code>width</code></em>
* <em class="parameter"><code>height</code></em>
double constants which are
used to set the matrix elements. </p>
<p>See also: <a class="link" href="VipsImage.html#vips-image-new-matrix" title="vips_image_new_matrix ()"><code class="function">vips_image_new_matrix()</code></a></p>
<div class="refsect3">
<a name="vips-image-new-matrixv.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>width</p></td>
<td class="parameter_description"><p>image width</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>height</p></td>
<td class="parameter_description"><p>image height</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>...</p></td>
<td class="parameter_description"><p>matrix coefficients</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="vips-image-new-matrixv.returns"></a><h4>Returns</h4>
<p> the new <a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a>, or <code class="literal">NULL</code> on error. </p>
<p><span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span></p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="vips-image-new-matrix-from-array"></a><h3>vips_image_new_matrix_from_array ()</h3>
<pre class="programlisting"><a class="link" href="VipsImage.html" title="VipsImage"><span class="returnvalue">VipsImage</span></a> *
vips_image_new_matrix_from_array (<em class="parameter"><code><span class="type">int</span> width</code></em>,
<em class="parameter"><code><span class="type">int</span> height</code></em>,
<em class="parameter"><code>const <span class="type">double</span> *array</code></em>,
<em class="parameter"><code><span class="type">int</span> size</code></em>);</pre>
<p>A binding-friendly version of <a class="link" href="VipsImage.html#vips-image-new-matrixv" title="vips_image_new_matrixv ()"><code class="function">vips_image_new_matrixv()</code></a>.</p>
<div class="refsect3">
<a name="vips-image-new-matrix-from-array.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>width</p></td>
<td class="parameter_description"><p>image width</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>height</p></td>
<td class="parameter_description"><p>image height</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>array</p></td>
<td class="parameter_description"><p> array of elements. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter points to an array of items."><span class="acronym">array</span></acronym> length=size][<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>size</p></td>
<td class="parameter_description"><p>number of elements</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="vips-image-new-matrix-from-array.returns"></a><h4>Returns</h4>
<p> the new <a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a>, or <code class="literal">NULL</code> on error. </p>
<p><span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span></p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="vips-image-matrix-from-array"></a><h3>vips_image_matrix_from_array ()</h3>
<pre class="programlisting"><a class="link" href="VipsImage.html" title="VipsImage"><span class="returnvalue">VipsImage</span></a> *
vips_image_matrix_from_array (<em class="parameter"><code><span class="type">int</span> width</code></em>,
<em class="parameter"><code><span class="type">int</span> height</code></em>,
<em class="parameter"><code>const <span class="type">double</span> *array</code></em>,
<em class="parameter"><code><span class="type">int</span> size</code></em>);</pre>
<p>A renamed <a class="link" href="VipsImage.html#vips-image-new-matrix-from-array" title="vips_image_new_matrix_from_array ()"><code class="function">vips_image_new_matrix_from_array()</code></a>. Some gobject bindings do not
like more than one _new method.</p>
<div class="refsect3">
<a name="vips-image-matrix-from-array.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>width</p></td>
<td class="parameter_description"><p>image width</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>height</p></td>
<td class="parameter_description"><p>image height</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>array</p></td>
<td class="parameter_description"><p> array of elements. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter points to an array of items."><span class="acronym">array</span></acronym> length=size][<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>size</p></td>
<td class="parameter_description"><p>number of elements</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="vips-image-matrix-from-array.returns"></a><h4>Returns</h4>
<p> the new <a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a>, or <code class="literal">NULL</code> on error. </p>
<p><span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span></p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="vips-image-set-delete-on-close"></a><h3>vips_image_set_delete_on_close ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
vips_image_set_delete_on_close (<em class="parameter"><code><a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a> *image</code></em>,
<em class="parameter"><code><span class="type">gboolean</span> delete_on_close</code></em>);</pre>
<p>Sets the delete_on_close flag for the image. If this flag is set, when
<em class="parameter"><code>image</code></em>
is finalized, the filename held in <em class="parameter"><code>image->filename</code></em>
at the time of
this call is deleted.</p>
<p>This function is clearly extremely dangerous, use with great caution.</p>
<p>See also: <a class="link" href="VipsImage.html#vips-image-new-temp-file" title="vips_image_new_temp_file ()"><code class="function">vips_image_new_temp_file()</code></a>.</p>
<div class="refsect3">
<a name="vips-image-set-delete-on-close.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>image</p></td>
<td class="parameter_description"><p>image to set</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>delete_on_close</p></td>
<td class="parameter_description"><p>format of file</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="vips-get-disc-threshold"></a><h3>vips_get_disc_threshold ()</h3>
<pre class="programlisting"><span class="returnvalue">guint64</span>
vips_get_disc_threshold (<em class="parameter"><code><span class="type">void</span></code></em>);</pre>
<p>Return the number of bytes at which we flip between open via memory and
open via disc. This defaults to 100mb, but can be changed with the
VIPS_DISC_THRESHOLD environment variable or the --vips-disc-threshold
command-line flag. See <a class="link" href="VipsImage.html#vips-image-new-from-file" title="vips_image_new_from_file ()"><code class="function">vips_image_new_from_file()</code></a>.</p>
<div class="refsect3">
<a name="vips-get-disc-threshold.returns"></a><h4>Returns</h4>
<p> disc threshold in bytes.</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="vips-image-new-temp-file"></a><h3>vips_image_new_temp_file ()</h3>
<pre class="programlisting"><a class="link" href="VipsImage.html" title="VipsImage"><span class="returnvalue">VipsImage</span></a> *
vips_image_new_temp_file (<em class="parameter"><code>const <span class="type">char</span> *format</code></em>);</pre>
<p>Make a <a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a> which, when written to, will create a temporary file on
disc. The file will be automatically deleted when the image is destroyed.
<em class="parameter"><code>format</code></em>
is something like "%s.v" for a vips file.</p>
<p>The file is created in the temporary directory. This is set with the
environment variable TMPDIR. If this is not set, then on Unix systems, vips
will default to /tmp. On Windows, vips uses <code class="function">GetTempPath()</code> to find the
temporary directory. </p>
<p>vips uses <code class="function">g_mkstemp()</code> to make the temporary filename. They generally look
something like "vips-12-EJKJFGH.v".</p>
<p>See also: <a class="link" href="VipsImage.html#vips-image-new" title="vips_image_new ()"><code class="function">vips_image_new()</code></a>.</p>
<div class="refsect3">
<a name="vips-image-new-temp-file.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>format</p></td>
<td class="parameter_description"><p>format of file</p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="vips-image-new-temp-file.returns"></a><h4>Returns</h4>
<p> the new <a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a>, or <code class="literal">NULL</code> on error.</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="vips-image-write"></a><h3>vips_image_write ()</h3>
<pre class="programlisting"><span class="returnvalue">int</span>
vips_image_write (<em class="parameter"><code><a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a> *image</code></em>,
<em class="parameter"><code><a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a> *out</code></em>);</pre>
<p>Write <em class="parameter"><code>image</code></em>
to <em class="parameter"><code>out</code></em>
. Use <a class="link" href="VipsImage.html#vips-image-new" title="vips_image_new ()"><code class="function">vips_image_new()</code></a> and friends to create the
<a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a> you want to write to.</p>
<p>See also: <a class="link" href="VipsImage.html#vips-image-new" title="vips_image_new ()"><code class="function">vips_image_new()</code></a>, <a class="link" href="libvips-conversion.html#vips-copy" title="vips_copy ()"><code class="function">vips_copy()</code></a>, <a class="link" href="VipsImage.html#vips-image-write-to-file" title="vips_image_write_to_file ()"><code class="function">vips_image_write_to_file()</code></a>.</p>
<div class="refsect3">
<a name="vips-image-write.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>image</p></td>
<td class="parameter_description"><p>image to write</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>out</p></td>
<td class="parameter_description"><p>write to this image</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="vips-image-write.returns"></a><h4>Returns</h4>
<p> 0 on success, or -1 on error.</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="vips-image-write-to-file"></a><h3>vips_image_write_to_file ()</h3>
<pre class="programlisting"><span class="returnvalue">int</span>
vips_image_write_to_file (<em class="parameter"><code><a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a> *image</code></em>,
<em class="parameter"><code>const <span class="type">char</span> *name</code></em>,
<em class="parameter"><code>...</code></em>);</pre>
<p>Writes <em class="parameter"><code>in</code></em>
to <em class="parameter"><code>name</code></em>
using the saver recommended by
<a class="link" href="VipsForeignSave.html#vips-foreign-find-save" title="vips_foreign_find_save ()"><code class="function">vips_foreign_find_save()</code></a>. </p>
<p>Save options may be appended to <em class="parameter"><code>filename</code></em>
as "[name=value,...]" or given as
a NULL-terminated list of name-value pairs at the end of the arguments.
Options given in the function call override options given in the filename. </p>
<p>See also: <a class="link" href="VipsImage.html#vips-image-new-from-file" title="vips_image_new_from_file ()"><code class="function">vips_image_new_from_file()</code></a>.</p>
<div class="refsect3">
<a name="vips-image-write-to-file.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>image</p></td>
<td class="parameter_description"><p>image to write</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>name</p></td>
<td class="parameter_description"><p>write to this file</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>...</p></td>
<td class="parameter_description"><p><code class="literal">NULL</code>-terminated list of optional named arguments</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="vips-image-write-to-file.returns"></a><h4>Returns</h4>
<p> 0 on success, or -1 on error.</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="vips-image-write-to-buffer"></a><h3>vips_image_write_to_buffer ()</h3>
<pre class="programlisting"><span class="returnvalue">int</span>
vips_image_write_to_buffer (<em class="parameter"><code><a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a> *in</code></em>,
<em class="parameter"><code>const <span class="type">char</span> *suffix</code></em>,
<em class="parameter"><code><span class="type">void</span> **buf</code></em>,
<em class="parameter"><code><span class="type">size_t</span> *size</code></em>,
<em class="parameter"><code>...</code></em>);</pre>
<p>Writes <em class="parameter"><code>in</code></em>
to a memory buffer in a format specified by <em class="parameter"><code>suffix</code></em>
. </p>
<p>Save options may be appended to <em class="parameter"><code>suffix</code></em>
as "[name=value,...]" or given as
a NULL-terminated list of name-value pairs at the end of the arguments.
Options given in the function call override options given in the filename. </p>
<p>Currently only TIFF, JPEG and PNG formats are supported.</p>
<p>You can call the various save operations directly if you wish, see
<a class="link" href="VipsForeignSave.html#vips-jpegsave-buffer" title="vips_jpegsave_buffer ()"><code class="function">vips_jpegsave_buffer()</code></a>, for example. </p>
<p>See also: <a class="link" href="VipsImage.html#vips-image-write-to-memory" title="vips_image_write_to_memory ()"><code class="function">vips_image_write_to_memory()</code></a>, <a class="link" href="VipsImage.html#vips-image-new-from-buffer" title="vips_image_new_from_buffer ()"><code class="function">vips_image_new_from_buffer()</code></a>.</p>
<div class="refsect3">
<a name="vips-image-write-to-buffer.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>in</p></td>
<td class="parameter_description"><p>image to write</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>suffix</p></td>
<td class="parameter_description"><p>format to write </p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>buf</p></td>
<td class="parameter_description"><p> return buffer start here. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter points to an array of items."><span class="acronym">array</span></acronym> length=size][<acronym title="Generics and defining elements of containers and arrays."><span class="acronym">element-type</span></acronym> guint8][<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>size</p></td>
<td class="parameter_description"><p>return buffer length here</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>...</p></td>
<td class="parameter_description"><p><code class="literal">NULL</code>-terminated list of optional named arguments</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="vips-image-write-to-buffer.returns"></a><h4>Returns</h4>
<p> 0 on success, -1 on error</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="vips-image-write-to-memory"></a><h3>vips_image_write_to_memory ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span> *
vips_image_write_to_memory (<em class="parameter"><code><a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a> *in</code></em>,
<em class="parameter"><code><span class="type">size_t</span> *size</code></em>);</pre>
<p>Writes <em class="parameter"><code>in</code></em>
to memory as a simple, unformatted C-style array. </p>
<p>The caller is responsible for freeing this memory. </p>
<p>See also: <a class="link" href="VipsImage.html#vips-image-write-to-buffer" title="vips_image_write_to_buffer ()"><code class="function">vips_image_write_to_buffer()</code></a>.</p>
<div class="refsect3">
<a name="vips-image-write-to-memory.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>in</p></td>
<td class="parameter_description"><p>image to write</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>size</p></td>
<td class="parameter_description"><p>return buffer length here</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="vips-image-write-to-memory.returns"></a><h4>Returns</h4>
<p> return buffer start here. </p>
<p><span class="annotation">[<acronym title="Parameter points to an array of items."><span class="acronym">array</span></acronym> length=size][<acronym title="Generics and defining elements of containers and arrays."><span class="acronym">element-type</span></acronym> guint8][<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span></p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="vips-image-decode-predict"></a><h3>vips_image_decode_predict ()</h3>
<pre class="programlisting"><span class="returnvalue">int</span>
vips_image_decode_predict (<em class="parameter"><code><a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a> *in</code></em>,
<em class="parameter"><code><span class="type">int</span> *bands</code></em>,
<em class="parameter"><code><a class="link" href="VipsImage.html#VipsBandFormat" title="enum VipsBandFormat"><span class="type">VipsBandFormat</span></a> *format</code></em>);</pre>
<p>We often need to know what an image will decode to without actually
decoding it, for example, in arg checking.</p>
<p>See also: <a class="link" href="VipsImage.html#vips-image-decode" title="vips_image_decode ()"><code class="function">vips_image_decode()</code></a>.</p>
<div class="refsect3">
<a name="vips-image-decode-predict.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>in</p></td>
<td class="parameter_description"><p>image to decode</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>bands</p></td>
<td class="parameter_description"><p>predict bands here</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>format</p></td>
<td class="parameter_description"><p>predict format here</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="vips-image-decode"></a><h3>vips_image_decode ()</h3>
<pre class="programlisting"><span class="returnvalue">int</span>
vips_image_decode (<em class="parameter"><code><a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a> *in</code></em>,
<em class="parameter"><code><a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a> **out</code></em>);</pre>
<p>A convenience function to unpack to a format that we can compute with.
<em class="parameter"><code>out.coding</code></em>
is always <a class="link" href="VipsImage.html#VIPS-CODING-NONE:CAPS"><span class="type">VIPS_CODING_NONE</span></a>. </p>
<p>This unpacks LABQ to plain LAB. Use <a class="link" href="libvips-colour.html#vips-LabQ2LabS" title="vips_LabQ2LabS ()"><code class="function">vips_LabQ2LabS()</code></a> for a bit more speed
if you need it. </p>
<p>See also: <a class="link" href="VipsImage.html#vips-image-encode" title="vips_image_encode ()"><code class="function">vips_image_encode()</code></a>, <a class="link" href="libvips-colour.html#vips-LabQ2Lab" title="vips_LabQ2Lab ()"><code class="function">vips_LabQ2Lab()</code></a>, <a class="link" href="libvips-colour.html#vips-rad2float" title="vips_rad2float ()"><code class="function">vips_rad2float()</code></a>.</p>
<div class="refsect3">
<a name="vips-image-decode.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>in</p></td>
<td class="parameter_description"><p>image to decode</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>out</p></td>
<td class="parameter_description"><p>write to this image</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="vips-image-decode.returns"></a><h4>Returns</h4>
<p> 0 on success, or -1 on error.</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="vips-image-encode"></a><h3>vips_image_encode ()</h3>
<pre class="programlisting"><span class="returnvalue">int</span>
vips_image_encode (<em class="parameter"><code><a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a> *in</code></em>,
<em class="parameter"><code><a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a> **out</code></em>,
<em class="parameter"><code><a class="link" href="VipsImage.html#VipsCoding" title="enum VipsCoding"><span class="type">VipsCoding</span></a> coding</code></em>);</pre>
<p>A convenience function to pack to a coding. The inverse of
<a class="link" href="VipsImage.html#vips-image-decode" title="vips_image_decode ()"><code class="function">vips_image_decode()</code></a>.</p>
<p>See also: <a class="link" href="VipsImage.html#vips-image-decode" title="vips_image_decode ()"><code class="function">vips_image_decode()</code></a>.</p>
<div class="refsect3">
<a name="vips-image-encode.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>in</p></td>
<td class="parameter_description"><p>image to encode</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>out</p></td>
<td class="parameter_description"><p>write to this image</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>coding</p></td>
<td class="parameter_description"><p>coding to apply</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="vips-image-encode.returns"></a><h4>Returns</h4>
<p> 0 on success, or -1 on error.</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="vips-image-isMSBfirst"></a><h3>vips_image_isMSBfirst ()</h3>
<pre class="programlisting"><span class="returnvalue">gboolean</span>
vips_image_isMSBfirst (<em class="parameter"><code><a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a> *image</code></em>);</pre>
<p>Return <code class="literal">TRUE</code> if <em class="parameter"><code>image</code></em>
is in most-significant-
byte first form. This is the byte order used on the SPARC
architecture and others.</p>
<div class="refsect3">
<a name="vips-image-isMSBfirst.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>image</p></td>
<td class="parameter_description"><p>image to test</p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="vips-image-isfile"></a><h3>vips_image_isfile ()</h3>
<pre class="programlisting"><span class="returnvalue">gboolean</span>
vips_image_isfile (<em class="parameter"><code><a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a> *image</code></em>);</pre>
<p>Return <code class="literal">TRUE</code> if <em class="parameter"><code>image</code></em>
represents a file on disc in some way.</p>
<div class="refsect3">
<a name="vips-image-isfile.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>image</p></td>
<td class="parameter_description"><p>image to test</p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="vips-image-ispartial"></a><h3>vips_image_ispartial ()</h3>
<pre class="programlisting"><span class="returnvalue">gboolean</span>
vips_image_ispartial (<em class="parameter"><code><a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a> *image</code></em>);</pre>
<p>Return <code class="literal">TRUE</code> if <em class="parameter"><code>im</code></em>
represents a partial image (a delayed calculation).</p>
<div class="refsect3">
<a name="vips-image-ispartial.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>image</p></td>
<td class="parameter_description"><p>image to test</p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="vips-image-copy-memory"></a><h3>vips_image_copy_memory ()</h3>
<pre class="programlisting"><a class="link" href="VipsImage.html" title="VipsImage"><span class="returnvalue">VipsImage</span></a> *
vips_image_copy_memory (<em class="parameter"><code><a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a> *image</code></em>);</pre>
<p>Allocate a memory buffer and copy <em class="parameter"><code>image</code></em>
to it. This is a thread-safe
equivalent of <a class="link" href="VipsImage.html#vips-image-wio-input" title="vips_image_wio_input ()"><code class="function">vips_image_wio_input()</code></a>, useful if <em class="parameter"><code>image</code></em>
is small and from an
unknown source.</p>
<p>If <em class="parameter"><code>image</code></em>
is already in memory (perhaps a mmaped file on disc),
<a class="link" href="VipsImage.html#vips-image-copy-memory" title="vips_image_copy_memory ()"><code class="function">vips_image_copy_memory()</code></a> will just ref <em class="parameter"><code>image</code></em>
and return that.</p>
<p>If you are sure that <em class="parameter"><code>image</code></em>
is not shared with another thread (perhaps you
have made it yourself), use <a class="link" href="VipsImage.html#vips-image-wio-input" title="vips_image_wio_input ()"><code class="function">vips_image_wio_input()</code></a> instead.</p>
<p>See also: <a class="link" href="VipsImage.html#vips-image-wio-input" title="vips_image_wio_input ()"><code class="function">vips_image_wio_input()</code></a>.</p>
<div class="refsect3">
<a name="vips-image-copy-memory.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>image</p></td>
<td class="parameter_description"><p>image to copy to a memory buffer</p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="vips-image-copy-memory.returns"></a><h4>Returns</h4>
<p> the new <a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a>, or <code class="literal">NULL</code> on error. </p>
<p><span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span></p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="vips-image-wio-input"></a><h3>vips_image_wio_input ()</h3>
<pre class="programlisting"><span class="returnvalue">int</span>
vips_image_wio_input (<em class="parameter"><code><a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a> *image</code></em>);</pre>
<p>Check that an image is readable via the <a class="link" href="VipsImage.html#VIPS-IMAGE-ADDR:CAPS" title="VIPS_IMAGE_ADDR()"><code class="function">VIPS_IMAGE_ADDR()</code></a> macro, that is,
that the entire image is in memory and all pixels can be read with
<a class="link" href="VipsImage.html#VIPS-IMAGE-ADDR:CAPS" title="VIPS_IMAGE_ADDR()"><code class="function">VIPS_IMAGE_ADDR()</code></a>. If it
isn't, try to transform it so that <a class="link" href="VipsImage.html#VIPS-IMAGE-ADDR:CAPS" title="VIPS_IMAGE_ADDR()"><code class="function">VIPS_IMAGE_ADDR()</code></a> can work. </p>
<p>Since this function modifies <em class="parameter"><code>image</code></em>
, it is not thread-safe. Only call it on
images which you are sure have not been shared with another thread. If the
image might have been shared, use the less efficient
<a class="link" href="VipsImage.html#vips-image-copy-memory" title="vips_image_copy_memory ()"><code class="function">vips_image_copy_memory()</code></a> instead.</p>
<p>See also: <a class="link" href="VipsImage.html#vips-image-copy-memory" title="vips_image_copy_memory ()"><code class="function">vips_image_copy_memory()</code></a>, <a class="link" href="VipsImage.html#vips-image-pio-input" title="vips_image_pio_input ()"><code class="function">vips_image_pio_input()</code></a>, <a class="link" href="VipsImage.html#vips-image-inplace" title="vips_image_inplace ()"><code class="function">vips_image_inplace()</code></a>, <a class="link" href="VipsImage.html#VIPS-IMAGE-ADDR:CAPS" title="VIPS_IMAGE_ADDR()"><code class="function">VIPS_IMAGE_ADDR()</code></a>.</p>
<div class="refsect3">
<a name="vips-image-wio-input.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>image</p></td>
<td class="parameter_description"><p>image to transform</p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="vips-image-wio-input.returns"></a><h4>Returns</h4>
<p> 0 on succeess, or -1 on error.</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="vips-image-pio-input"></a><h3>vips_image_pio_input ()</h3>
<pre class="programlisting"><span class="returnvalue">int</span>
vips_image_pio_input (<em class="parameter"><code><a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a> *image</code></em>);</pre>
<p>Check that an image is readable with <a class="link" href="VipsRegion.html#vips-region-prepare" title="vips_region_prepare ()"><code class="function">vips_region_prepare()</code></a> and friends.
If it isn't, try to transform the image so that <a class="link" href="VipsRegion.html#vips-region-prepare" title="vips_region_prepare ()"><code class="function">vips_region_prepare()</code></a> can
work.</p>
<p>See also: <a class="link" href="VipsImage.html#vips-image-pio-output" title="vips_image_pio_output ()"><code class="function">vips_image_pio_output()</code></a>, <a class="link" href="VipsRegion.html#vips-region-prepare" title="vips_region_prepare ()"><code class="function">vips_region_prepare()</code></a>.</p>
<div class="refsect3">
<a name="vips-image-pio-input.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>image</p></td>
<td class="parameter_description"><p>image to check</p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="vips-image-pio-input.returns"></a><h4>Returns</h4>
<p> 0 on succeess, or -1 on error.</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="vips-image-pio-output"></a><h3>vips_image_pio_output ()</h3>
<pre class="programlisting"><span class="returnvalue">int</span>
vips_image_pio_output (<em class="parameter"><code><a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a> *image</code></em>);</pre>
<p>Check that an image is writeable with <a class="link" href="libvips-generate.html#vips-image-generate" title="vips_image_generate ()"><code class="function">vips_image_generate()</code></a>. If it isn't,
try to transform the image so that <a class="link" href="libvips-generate.html#vips-image-generate" title="vips_image_generate ()"><code class="function">vips_image_generate()</code></a> can work.</p>
<p>See also: <a class="link" href="VipsImage.html#vips-image-pio-input" title="vips_image_pio_input ()"><code class="function">vips_image_pio_input()</code></a>.</p>
<div class="refsect3">
<a name="vips-image-pio-output.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>image</p></td>
<td class="parameter_description"><p>image to check</p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="vips-image-pio-output.returns"></a><h4>Returns</h4>
<p> 0 on succeess, or -1 on error.</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="vips-image-inplace"></a><h3>vips_image_inplace ()</h3>
<pre class="programlisting"><span class="returnvalue">int</span>
vips_image_inplace (<em class="parameter"><code><a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a> *image</code></em>);</pre>
<p>Gets <em class="parameter"><code>image</code></em>
ready for an in-place operation, such as <a class="link" href="libvips-draw.html#vips-draw-circle" title="vips_draw_circle ()"><code class="function">vips_draw_circle()</code></a>.
After calling this function you can both read and write the image with
<a class="link" href="VipsImage.html#VIPS-IMAGE-ADDR:CAPS" title="VIPS_IMAGE_ADDR()"><code class="function">VIPS_IMAGE_ADDR()</code></a>.</p>
<p>Since this function modifies <em class="parameter"><code>image</code></em>
, it is not thread-safe. Only call it on
images which you are sure have not been shared with another thread.
All in-place operations are inherently not thread-safe, so you need to take
great care in any case.</p>
<p>See also: <a class="link" href="libvips-draw.html#vips-draw-circle" title="vips_draw_circle ()"><code class="function">vips_draw_circle()</code></a>, <a class="link" href="VipsImage.html#vips-image-wio-input" title="vips_image_wio_input ()"><code class="function">vips_image_wio_input()</code></a>.</p>
<div class="refsect3">
<a name="vips-image-inplace.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>image</p></td>
<td class="parameter_description"><p>image to make read-write</p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="vips-image-inplace.returns"></a><h4>Returns</h4>
<p> 0 on succeess, or -1 on error.</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="vips-image-write-prepare"></a><h3>vips_image_write_prepare ()</h3>
<pre class="programlisting"><span class="returnvalue">int</span>
vips_image_write_prepare (<em class="parameter"><code><a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a> *image</code></em>);</pre>
<p>Call this after setting header fields (width, height, and so on) to
allocate resources ready for writing. </p>
<p>Normally this function is called for you by <a class="link" href="libvips-generate.html#vips-image-generate" title="vips_image_generate ()"><code class="function">vips_image_generate()</code></a> or
<a class="link" href="VipsImage.html#vips-image-write-line" title="vips_image_write_line ()"><code class="function">vips_image_write_line()</code></a>. You will need to call it yourself if you plan to
write directly to the ->data member of a memory image.</p>
<div class="refsect3">
<a name="vips-image-write-prepare.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>image</p></td>
<td class="parameter_description"><p>image to prepare</p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="vips-image-write-prepare.returns"></a><h4>Returns</h4>
<p> 0 on success, or -1 on error.</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="vips-image-write-line"></a><h3>vips_image_write_line ()</h3>
<pre class="programlisting"><span class="returnvalue">int</span>
vips_image_write_line (<em class="parameter"><code><a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a> *image</code></em>,
<em class="parameter"><code><span class="type">int</span> ypos</code></em>,
<em class="parameter"><code><a class="link" href="libvips-basic.html#VipsPel" title="VipsPel"><span class="type">VipsPel</span></a> *linebuffer</code></em>);</pre>
<p>Write a line of pixels to an image. This function must be called repeatedly
with <em class="parameter"><code>ypos</code></em>
increasing from 0 to <span class="type">“height”</span> .
<em class="parameter"><code>linebuffer</code></em>
must be <a class="link" href="VipsImage.html#VIPS-IMAGE-SIZEOF-LINE:CAPS" title="VIPS_IMAGE_SIZEOF_LINE()"><code class="function">VIPS_IMAGE_SIZEOF_LINE()</code></a> bytes long.</p>
<p>See also: <a class="link" href="libvips-generate.html#vips-image-generate" title="vips_image_generate ()"><code class="function">vips_image_generate()</code></a>.</p>
<div class="refsect3">
<a name="vips-image-write-line.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>image</p></td>
<td class="parameter_description"><p>image to write to</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>ypos</p></td>
<td class="parameter_description"><p>vertical position of scan-line to write</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>linebuffer</p></td>
<td class="parameter_description"><p>scanline of pixels</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="vips-image-write-line.returns"></a><h4>Returns</h4>
<p> 0 on success, or -1 on error.</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="vips-band-format-isint"></a><h3>vips_band_format_isint ()</h3>
<pre class="programlisting"><span class="returnvalue">gboolean</span>
vips_band_format_isint (<em class="parameter"><code><a class="link" href="VipsImage.html#VipsBandFormat" title="enum VipsBandFormat"><span class="type">VipsBandFormat</span></a> format</code></em>);</pre>
<p>Return <code class="literal">TRUE</code> if <em class="parameter"><code>format</code></em>
is one of the integer types.</p>
<div class="refsect3">
<a name="vips-band-format-isint.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>format</p></td>
<td class="parameter_description"><p>format to test</p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="vips-band-format-isuint"></a><h3>vips_band_format_isuint ()</h3>
<pre class="programlisting"><span class="returnvalue">gboolean</span>
vips_band_format_isuint (<em class="parameter"><code><a class="link" href="VipsImage.html#VipsBandFormat" title="enum VipsBandFormat"><span class="type">VipsBandFormat</span></a> format</code></em>);</pre>
<p>Return <code class="literal">TRUE</code> if <em class="parameter"><code>format</code></em>
is one of the unsigned integer types.</p>
<div class="refsect3">
<a name="vips-band-format-isuint.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>format</p></td>
<td class="parameter_description"><p>format to test</p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="vips-band-format-is8bit"></a><h3>vips_band_format_is8bit ()</h3>
<pre class="programlisting"><span class="returnvalue">gboolean</span>
vips_band_format_is8bit (<em class="parameter"><code><a class="link" href="VipsImage.html#VipsBandFormat" title="enum VipsBandFormat"><span class="type">VipsBandFormat</span></a> format</code></em>);</pre>
<p>Return <code class="literal">TRUE</code> if <em class="parameter"><code>format</code></em>
is uchar or schar.</p>
<div class="refsect3">
<a name="vips-band-format-is8bit.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>format</p></td>
<td class="parameter_description"><p>format to test</p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="vips-band-format-isfloat"></a><h3>vips_band_format_isfloat ()</h3>
<pre class="programlisting"><span class="returnvalue">gboolean</span>
vips_band_format_isfloat (<em class="parameter"><code><a class="link" href="VipsImage.html#VipsBandFormat" title="enum VipsBandFormat"><span class="type">VipsBandFormat</span></a> format</code></em>);</pre>
<p>Return <code class="literal">TRUE</code> if <em class="parameter"><code>format</code></em>
is one of the float types.</p>
<div class="refsect3">
<a name="vips-band-format-isfloat.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>format</p></td>
<td class="parameter_description"><p>format to test</p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="vips-band-format-iscomplex"></a><h3>vips_band_format_iscomplex ()</h3>
<pre class="programlisting"><span class="returnvalue">gboolean</span>
vips_band_format_iscomplex (<em class="parameter"><code><a class="link" href="VipsImage.html#VipsBandFormat" title="enum VipsBandFormat"><span class="type">VipsBandFormat</span></a> format</code></em>);</pre>
<p>Return <code class="literal">TRUE</code> if <em class="parameter"><code>fmt</code></em>
is one of the complex types.</p>
<div class="refsect3">
<a name="vips-band-format-iscomplex.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>format</p></td>
<td class="parameter_description"><p>format to test</p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="vips-system"></a><h3>vips_system ()</h3>
<pre class="programlisting"><span class="returnvalue">int</span>
vips_system (<em class="parameter"><code>const <span class="type">char</span> *cmd_format</code></em>,
<em class="parameter"><code>...</code></em>);</pre>
<p>Optional arguments:</p>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem"><p><em class="parameter"><code>in</code></em>
: array of input images</p></li>
<li class="listitem"><p><em class="parameter"><code>out</code></em>
: output image</p></li>
<li class="listitem"><p><em class="parameter"><code>in_format</code></em>
: write input files like this</p></li>
<li class="listitem"><p><em class="parameter"><code>out_format</code></em>
: write output filename like this</p></li>
<li class="listitem"><p><em class="parameter"><code>log</code></em>
: stdout of command is returned here</p></li>
</ul></div>
<p>vips_system() runs a command, optionally passing a set of images in and
optionally getting an image back. The command's stdout is returned in <em class="parameter"><code>log</code></em>
. </p>
<p>First, if <em class="parameter"><code>in</code></em>
is set, the array of images are written to files. See
<a class="link" href="VipsImage.html#vips-image-new-temp-file" title="vips_image_new_temp_file ()"><code class="function">vips_image_new_temp_file()</code></a> to see how temporary files are created.
If <em class="parameter"><code>in_format</code></em>
is
something like %s.png, the file will be written in PNG format. By
default, <em class="parameter"><code>in_format</code></em>
is %s.tif. </p>
<p>If <em class="parameter"><code>out_format</code></em>
is set, an output filename is formed in the same way. Any
trailing [options] are stripped from <em class="parameter"><code>out_format</code></em>
. </p>
<p>The command string to run is made by substituting the first set of %s
in <em class="parameter"><code>cmd_format</code></em>
for the names of the input files, if <em class="parameter"><code>in</code></em>
is set, and then
the next %s for the output filename, if <em class="parameter"><code>out_format</code></em>
is set.
You can put a number between the % and the s to change the order
in which the substitution occurs.</p>
<p>The command is executed with <code class="function">popen()</code> and the output captured in <em class="parameter"><code>log</code></em>
. </p>
<p>After the command finishes, if <em class="parameter"><code>out_format</code></em>
is set, the output image is
opened and returned in <em class="parameter"><code>out</code></em>
. You can append [options] to <em class="parameter"><code>out_format</code></em>
to
control how this open happens.
Closing <em class="parameter"><code>out</code></em>
image will automatically delete the output file.</p>
<p>Finally the input images are deleted. </p>
<p>For example, this call will run the ImageMagick convert program on an
image, using JPEG files to pass images into and out of the convert command.</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</pre></td>
<td class="listing_code"><pre class="programlisting">VipsArrayImage <span class="gtkdoc opt">*</span>in<span class="gtkdoc opt">;</span>
VipsImage <span class="gtkdoc opt">*</span>out<span class="gtkdoc opt">;</span>
<span class="gtkdoc kwb">char</span> <span class="gtkdoc opt">*</span>log<span class="gtkdoc opt">;</span>
<span class="keyword">if</span> <span class="gtkdoc opt">(</span><span class="function"><a href="VipsImage.html#vips-system">vips_system</a></span> <span class="gtkdoc opt">(</span><span class="string">"convert %s -swirl 45 %s"</span><span class="gtkdoc opt">,</span>
<span class="string">"in"</span><span class="gtkdoc opt">,</span> in<span class="gtkdoc opt">,</span>
<span class="string">"out"</span><span class="gtkdoc opt">, &</span>out<span class="gtkdoc opt">,</span>
<span class="string">"in_format"</span><span class="gtkdoc opt">,</span> <span class="string">"%s.jpg"</span><span class="gtkdoc opt">,</span>
<span class="string">"out_format"</span><span class="gtkdoc opt">,</span> <span class="string">"%s.jpg"</span><span class="gtkdoc opt">,</span>
<span class="string">"log"</span><span class="gtkdoc opt">, &</span>log<span class="gtkdoc opt">,</span>
NULL<span class="gtkdoc opt">))</span>
error <span class="gtkdoc opt">...</span></pre></td>
</tr>
</tbody>
</table>
</div>
<p></p>
<div class="refsect3">
<a name="vips-system.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>cmd_format</p></td>
<td class="parameter_description"><p>command to run</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>...</p></td>
<td class="parameter_description"><p><code class="literal">NULL</code>-terminated list of optional named arguments</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="vips-system.returns"></a><h4>Returns</h4>
<p> 0 on success, -1 on failure. </p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="vips-array-image-new"></a><h3>vips_array_image_new ()</h3>
<pre class="programlisting"><a class="link" href="libvips-type.html#VipsArrayImage"><span class="returnvalue">VipsArrayImage</span></a> *
vips_array_image_new (<em class="parameter"><code><a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a> **array</code></em>,
<em class="parameter"><code><span class="type">int</span> n</code></em>);</pre>
<p>Allocate a new array of images and copy <em class="parameter"><code>array</code></em>
into it. Free with
<a class="link" href="libvips-type.html#vips-area-unref" title="vips_area_unref ()"><code class="function">vips_area_unref()</code></a>. </p>
<p>The images will all be reffed by this function. They
will be automatically unreffed for you by
<a class="link" href="libvips-type.html#vips-area-unref" title="vips_area_unref ()"><code class="function">vips_area_unref()</code></a>.</p>
<p>Add an extra NULL element at the end, handy for eg.
<a class="link" href="libvips-generate.html#vips-image-pipeline-array" title="vips_image_pipeline_array ()"><code class="function">vips_image_pipeline_array()</code></a> etc. </p>
<p>See also: <a class="link" href="libvips-type.html#VipsArea"><span class="type">VipsArea</span></a>.</p>
<div class="refsect3">
<a name="vips-array-image-new.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>array</p></td>
<td class="parameter_description"><p> array of <a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a>. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter points to an array of items."><span class="acronym">array</span></acronym> length=n]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>n</p></td>
<td class="parameter_description"><p>number of images</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="vips-array-image-new.returns"></a><h4>Returns</h4>
<p> A new <a class="link" href="libvips-type.html#VipsArrayImage"><span class="type">VipsArrayImage</span></a>. </p>
<p><span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span></p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="vips-array-image-newv"></a><h3>vips_array_image_newv ()</h3>
<pre class="programlisting"><a class="link" href="libvips-type.html#VipsArrayImage"><span class="returnvalue">VipsArrayImage</span></a> *
vips_array_image_newv (<em class="parameter"><code><span class="type">int</span> n</code></em>,
<em class="parameter"><code>...</code></em>);</pre>
<p>Allocate a new array of <em class="parameter"><code>n</code></em>
<a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a> and copy @... into it. Free with
<a class="link" href="libvips-type.html#vips-area-unref" title="vips_area_unref ()"><code class="function">vips_area_unref()</code></a>. </p>
<p>The images will all be reffed by this function. They
will be automatically unreffed for you by
<a class="link" href="libvips-type.html#vips-area-unref" title="vips_area_unref ()"><code class="function">vips_area_unref()</code></a>.</p>
<p>Add an extra NULL element at the end, handy for eg.
<a class="link" href="libvips-generate.html#vips-image-pipeline-array" title="vips_image_pipeline_array ()"><code class="function">vips_image_pipeline_array()</code></a> etc. </p>
<p>See also: <a class="link" href="VipsImage.html#vips-array-image-new" title="vips_array_image_new ()"><code class="function">vips_array_image_new()</code></a></p>
<div class="refsect3">
<a name="vips-array-image-newv.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>n</p></td>
<td class="parameter_description"><p>number of images</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>...</p></td>
<td class="parameter_description"><p>list of <a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a> arguments</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="vips-array-image-newv.returns"></a><h4>Returns</h4>
<p> A new <a class="link" href="libvips-type.html#VipsArrayImage"><span class="type">VipsArrayImage</span></a>. </p>
<p><span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span></p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="vips-array-image-new-from-string"></a><h3>vips_array_image_new_from_string ()</h3>
<pre class="programlisting"><a class="link" href="libvips-type.html#VipsArrayImage"><span class="returnvalue">VipsArrayImage</span></a> *
vips_array_image_new_from_string (<em class="parameter"><code>const <span class="type">char</span> *string</code></em>,
<em class="parameter"><code><a class="link" href="VipsImage.html#VipsAccess" title="enum VipsAccess"><span class="type">VipsAccess</span></a> flags</code></em>);</pre>
</div>
<hr>
<div class="refsect2">
<a name="vips-array-image-empty"></a><h3>vips_array_image_empty ()</h3>
<pre class="programlisting"><a class="link" href="libvips-type.html#VipsArrayImage"><span class="returnvalue">VipsArrayImage</span></a> *
vips_array_image_empty (<em class="parameter"><code><span class="type">void</span></code></em>);</pre>
<p>Make an empty image array.
Handy with <code class="function">vips_array_image_add()</code> for bindings
which can't handle object array arguments.</p>
<p>See also: <code class="function">vips_array_image_add()</code>.</p>
<div class="refsect3">
<a name="vips-array-image-empty.returns"></a><h4>Returns</h4>
<p> A new <a class="link" href="libvips-type.html#VipsArrayImage"><span class="type">VipsArrayImage</span></a>. </p>
<p><span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span></p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="vips-array-image-append"></a><h3>vips_array_image_append ()</h3>
<pre class="programlisting"><a class="link" href="libvips-type.html#VipsArrayImage"><span class="returnvalue">VipsArrayImage</span></a> *
vips_array_image_append (<em class="parameter"><code><a class="link" href="libvips-type.html#VipsArrayImage"><span class="type">VipsArrayImage</span></a> *array</code></em>,
<em class="parameter"><code><a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a> *image</code></em>);</pre>
<p>Make a new <a class="link" href="libvips-type.html#VipsArrayImage"><span class="type">VipsArrayImage</span></a>, one larger than <em class="parameter"><code>array</code></em>
, with <em class="parameter"><code>image</code></em>
appended
to the end.
Handy with <a class="link" href="VipsImage.html#vips-array-image-empty" title="vips_array_image_empty ()"><code class="function">vips_array_image_empty()</code></a> for bindings
which can't handle object array arguments.</p>
<p>See also: <a class="link" href="VipsImage.html#vips-array-image-empty" title="vips_array_image_empty ()"><code class="function">vips_array_image_empty()</code></a>.</p>
<div class="refsect3">
<a name="vips-array-image-append.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>array</p></td>
<td class="parameter_description"><p> append to this. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>image</p></td>
<td class="parameter_description"><p>add this</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="vips-array-image-append.returns"></a><h4>Returns</h4>
<p> A new <a class="link" href="libvips-type.html#VipsArrayImage"><span class="type">VipsArrayImage</span></a>. </p>
<p><span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span></p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="vips-array-image-get"></a><h3>vips_array_image_get ()</h3>
<pre class="programlisting"><a class="link" href="VipsImage.html" title="VipsImage"><span class="returnvalue">VipsImage</span></a> **
vips_array_image_get (<em class="parameter"><code><a class="link" href="libvips-type.html#VipsArrayImage"><span class="type">VipsArrayImage</span></a> *array</code></em>,
<em class="parameter"><code><span class="type">int</span> *n</code></em>);</pre>
<p>Fetch an image array from a <a class="link" href="libvips-type.html#VipsArrayImage"><span class="type">VipsArrayImage</span></a>. Useful for language bindings.</p>
<div class="refsect3">
<a name="vips-array-image-get.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>array</p></td>
<td class="parameter_description"><p>the <a class="link" href="libvips-type.html#VipsArrayImage"><span class="type">VipsArrayImage</span></a> to fetch from</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>n</p></td>
<td class="parameter_description"><p>length of array</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="vips-array-image-get.returns"></a><h4>Returns</h4>
<p> array of <a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a>. </p>
<p><span class="annotation">[<acronym title="Parameter points to an array of items."><span class="acronym">array</span></acronym> length=n][<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>]</span></p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="vips-value-get-array-image"></a><h3>vips_value_get_array_image ()</h3>
<pre class="programlisting"><a class="link" href="VipsImage.html" title="VipsImage"><span class="returnvalue">VipsImage</span></a> **
vips_value_get_array_image (<em class="parameter"><code>const <span class="type">GValue</span> *value</code></em>,
<em class="parameter"><code><span class="type">int</span> *n</code></em>);</pre>
<p>Return the start of the array of images held by <em class="parameter"><code>value</code></em>
.
optionally return the number of elements in <em class="parameter"><code>n</code></em>
.</p>
<p>See also: <a class="link" href="VipsImage.html#vips-value-set-array-image" title="vips_value_set_array_image ()"><code class="function">vips_value_set_array_image()</code></a>.</p>
<div class="refsect3">
<a name="vips-value-get-array-image.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>value</p></td>
<td class="parameter_description"><p><code class="literal">GValue</code> to get from</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>n</p></td>
<td class="parameter_description"><p> return the number of elements here, optionally. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span></td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="vips-value-get-array-image.returns"></a><h4>Returns</h4>
<p> The array address. </p>
<p><span class="annotation">[<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>]</span></p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="vips-value-set-array-image"></a><h3>vips_value_set_array_image ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
vips_value_set_array_image (<em class="parameter"><code><span class="type">GValue</span> *value</code></em>,
<em class="parameter"><code><span class="type">int</span> n</code></em>);</pre>
<p>Set <em class="parameter"><code>value</code></em>
to hold an array of images. Pass in the array length in <em class="parameter"><code>n</code></em>
. </p>
<p>See also: <a class="link" href="VipsImage.html#vips-array-image-get" title="vips_array_image_get ()"><code class="function">vips_array_image_get()</code></a>.</p>
<div class="refsect3">
<a name="vips-value-set-array-image.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>value</p></td>
<td class="parameter_description"><p> <code class="literal">GValue</code> to get from. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter for returning results. Default is transfer full."><span class="acronym">out</span></acronym>]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>n</p></td>
<td class="parameter_description"><p>the number of elements </p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
</div>
</div>
<div class="refsect1">
<a name="VipsImage.other_details"></a><h2>Types and Values</h2>
<div class="refsect2">
<a name="VIPS-MAGIC-INTEL:CAPS"></a><h3>VIPS_MAGIC_INTEL</h3>
<pre class="programlisting">#define VIPS_MAGIC_INTEL (0xb6a6f208U)
</pre>
<p>The first four bytes of a VIPS file in Intel byte ordering.</p>
</div>
<hr>
<div class="refsect2">
<a name="VIPS-MAGIC-SPARC:CAPS"></a><h3>VIPS_MAGIC_SPARC</h3>
<pre class="programlisting">#define VIPS_MAGIC_SPARC (0x08f2a6b6U)
</pre>
<p>The first four bytes of a VIPS file in SPARC byte ordering.</p>
</div>
<hr>
<div class="refsect2">
<a name="VIPS-MAX-COORD:CAPS"></a><h3>VIPS_MAX_COORD</h3>
<pre class="programlisting">#define VIPS_MAX_COORD (10000000)
</pre>
</div>
<hr>
<div class="refsect2">
<a name="VipsDemandStyle"></a><h3>enum VipsDemandStyle</h3>
<p>See <a class="link" href="libvips-generate.html#vips-image-pipelinev" title="vips_image_pipelinev ()"><code class="function">vips_image_pipelinev()</code></a>. Operations can hint to the VIPS image IO
system about the kind of demand geometry they prefer. </p>
<p>These demand styles are given below in order of increasing
restrictiveness. When demanding output from a pipeline,
<a class="link" href="libvips-generate.html#vips-image-generate" title="vips_image_generate ()"><code class="function">vips_image_generate()</code></a>
will use the most restrictive of the styles requested by the operations
in the pipeline.</p>
<p><a class="link" href="VipsImage.html#VIPS-DEMAND-STYLE-THINSTRIP:CAPS"><span class="type">VIPS_DEMAND_STYLE_THINSTRIP</span></a> --- This operation would like to output strips
the width of the image and a few pels high. This is option suitable for
point-to-point operations, such as those in the arithmetic package.</p>
<p>This option is only efficient for cases where each output pel depends
upon the pel in the corresponding position in the input image.</p>
<p><a class="link" href="VipsImage.html#VIPS-DEMAND-STYLE-FATSTRIP:CAPS"><span class="type">VIPS_DEMAND_STYLE_FATSTRIP</span></a> --- This operation would like to output strips
the width of the image and as high as possible. This option is suitable
for area operations which do not violently transform coordinates, such
as <a class="link" href="libvips-convolution.html#vips-conv" title="vips_conv ()"><code class="function">vips_conv()</code></a>. </p>
<p><a class="link" href="VipsImage.html#VIPS-DEMAND-STYLE-SMALLTILE:CAPS"><span class="type">VIPS_DEMAND_STYLE_SMALLTILE</span></a> --- This is the most general demand format.
Output is demanded in small (around 100x100 pel) sections. This style works
reasonably efficiently, even for bizzare operations like 45 degree rotate.</p>
<p><a class="link" href="VipsImage.html#VIPS-DEMAND-STYLE-ANY:CAPS"><span class="type">VIPS_DEMAND_STYLE_ANY</span></a> --- This image is not being demand-read from a disc
file (even indirectly) so any demand style is OK. It's used for things like
<a class="link" href="libvips-create.html#vips-black" title="vips_black ()"><code class="function">vips_black()</code></a> where the pixels are calculated.</p>
<p>See also: <a class="link" href="libvips-generate.html#vips-image-pipelinev" title="vips_image_pipelinev ()"><code class="function">vips_image_pipelinev()</code></a>.</p>
<div class="refsect3">
<a name="VipsDemandStyle.members"></a><h4>Members</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="300px" class="enum_members_name">
<col class="enum_members_description">
<col width="200px" class="enum_members_annotations">
</colgroup>
<tbody>
<tr>
<td class="enum_member_name"><p><a name="VIPS-DEMAND-STYLE-ERROR:CAPS"></a>VIPS_DEMAND_STYLE_ERROR</p></td>
<td> </td>
<td> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="VIPS-DEMAND-STYLE-SMALLTILE:CAPS"></a>VIPS_DEMAND_STYLE_SMALLTILE</p></td>
<td class="enum_member_description">
<p>demand in small (typically 64x64 pixel) tiles</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="VIPS-DEMAND-STYLE-FATSTRIP:CAPS"></a>VIPS_DEMAND_STYLE_FATSTRIP</p></td>
<td class="enum_member_description">
<p>demand in fat (typically 10 pixel high) strips</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="VIPS-DEMAND-STYLE-THINSTRIP:CAPS"></a>VIPS_DEMAND_STYLE_THINSTRIP</p></td>
<td class="enum_member_description">
<p>demand in thin (typically 1 pixel high) strips</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="VIPS-DEMAND-STYLE-ANY:CAPS"></a>VIPS_DEMAND_STYLE_ANY</p></td>
<td class="enum_member_description">
<p>demand geometry does not matter</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="VipsImageType"></a><h3>enum VipsImageType</h3>
<div class="refsect3">
<a name="VipsImageType.members"></a><h4>Members</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="300px" class="enum_members_name">
<col class="enum_members_description">
<col width="200px" class="enum_members_annotations">
</colgroup>
<tbody>
<tr>
<td class="enum_member_name"><p><a name="VIPS-IMAGE-ERROR:CAPS"></a>VIPS_IMAGE_ERROR</p></td>
<td> </td>
<td> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="VIPS-IMAGE-NONE:CAPS"></a>VIPS_IMAGE_NONE</p></td>
<td> </td>
<td> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="VIPS-IMAGE-SETBUF:CAPS"></a>VIPS_IMAGE_SETBUF</p></td>
<td> </td>
<td> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="VIPS-IMAGE-SETBUF-FOREIGN:CAPS"></a>VIPS_IMAGE_SETBUF_FOREIGN</p></td>
<td> </td>
<td> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="VIPS-IMAGE-OPENIN:CAPS"></a>VIPS_IMAGE_OPENIN</p></td>
<td> </td>
<td> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="VIPS-IMAGE-MMAPIN:CAPS"></a>VIPS_IMAGE_MMAPIN</p></td>
<td> </td>
<td> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="VIPS-IMAGE-MMAPINRW:CAPS"></a>VIPS_IMAGE_MMAPINRW</p></td>
<td> </td>
<td> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="VIPS-IMAGE-OPENOUT:CAPS"></a>VIPS_IMAGE_OPENOUT</p></td>
<td> </td>
<td> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="VIPS-IMAGE-PARTIAL:CAPS"></a>VIPS_IMAGE_PARTIAL</p></td>
<td> </td>
<td> </td>
</tr>
</tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="VipsInterpretation"></a><h3>enum VipsInterpretation</h3>
<p>How the values in an image should be interpreted. For example, a
three-band float image of type <a class="link" href="VipsImage.html#VIPS-INTERPRETATION-LAB:CAPS"><span class="type">VIPS_INTERPRETATION_LAB</span></a> should have its
pixels interpreted as coordinates in CIE Lab space.</p>
<p>These values are set by operations as hints to user-interfaces built on top
of VIPS to help them show images to the user in a meaningful way.
Operations do not use these values to decide their action.</p>
<p>The gaps in numbering are historical and must be maintained. Allocate
new numbers from the end.</p>
<div class="refsect3">
<a name="VipsInterpretation.members"></a><h4>Members</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="300px" class="enum_members_name">
<col class="enum_members_description">
<col width="200px" class="enum_members_annotations">
</colgroup>
<tbody>
<tr>
<td class="enum_member_name"><p><a name="VIPS-INTERPRETATION-ERROR:CAPS"></a>VIPS_INTERPRETATION_ERROR</p></td>
<td> </td>
<td> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="VIPS-INTERPRETATION-MULTIBAND:CAPS"></a>VIPS_INTERPRETATION_MULTIBAND</p></td>
<td class="enum_member_description">
<p>generic many-band image</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="VIPS-INTERPRETATION-B-W:CAPS"></a>VIPS_INTERPRETATION_B_W</p></td>
<td class="enum_member_description">
<p>some kind of single-band image</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="VIPS-INTERPRETATION-HISTOGRAM:CAPS"></a>VIPS_INTERPRETATION_HISTOGRAM</p></td>
<td class="enum_member_description">
<p>a 1D image, eg. histogram or lookup table</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="VIPS-INTERPRETATION-XYZ:CAPS"></a>VIPS_INTERPRETATION_XYZ</p></td>
<td class="enum_member_description">
<p>the first three bands are CIE XYZ </p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="VIPS-INTERPRETATION-LAB:CAPS"></a>VIPS_INTERPRETATION_LAB</p></td>
<td class="enum_member_description">
<p>pixels are in CIE Lab space</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="VIPS-INTERPRETATION-CMYK:CAPS"></a>VIPS_INTERPRETATION_CMYK</p></td>
<td class="enum_member_description">
<p>the first four bands are in CMYK space</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="VIPS-INTERPRETATION-LABQ:CAPS"></a>VIPS_INTERPRETATION_LABQ</p></td>
<td class="enum_member_description">
<p>implies <a class="link" href="VipsImage.html#VIPS-CODING-LABQ:CAPS"><span class="type">VIPS_CODING_LABQ</span></a></p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="VIPS-INTERPRETATION-RGB:CAPS"></a>VIPS_INTERPRETATION_RGB</p></td>
<td class="enum_member_description">
<p>generic RGB space</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="VIPS-INTERPRETATION-CMC:CAPS"></a>VIPS_INTERPRETATION_CMC</p></td>
<td class="enum_member_description">
<p>a uniform colourspace based on CMC(1:1)</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="VIPS-INTERPRETATION-LCH:CAPS"></a>VIPS_INTERPRETATION_LCH</p></td>
<td class="enum_member_description">
<p>pixels are in CIE LCh space</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="VIPS-INTERPRETATION-LABS:CAPS"></a>VIPS_INTERPRETATION_LABS</p></td>
<td class="enum_member_description">
<p>CIE LAB coded as three signed 16-bit values</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="VIPS-INTERPRETATION-sRGB"></a>VIPS_INTERPRETATION_sRGB</p></td>
<td class="enum_member_description">
<p>pixels are sRGB</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="VIPS-INTERPRETATION-YXY:CAPS"></a>VIPS_INTERPRETATION_YXY</p></td>
<td class="enum_member_description">
<p>pixels are CIE Yxy</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="VIPS-INTERPRETATION-FOURIER:CAPS"></a>VIPS_INTERPRETATION_FOURIER</p></td>
<td class="enum_member_description">
<p>image is in fourier space</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="VIPS-INTERPRETATION-RGB16:CAPS"></a>VIPS_INTERPRETATION_RGB16</p></td>
<td class="enum_member_description">
<p>generic 16-bit RGB</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="VIPS-INTERPRETATION-GREY16:CAPS"></a>VIPS_INTERPRETATION_GREY16</p></td>
<td class="enum_member_description">
<p>generic 16-bit mono</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="VIPS-INTERPRETATION-MATRIX:CAPS"></a>VIPS_INTERPRETATION_MATRIX</p></td>
<td class="enum_member_description">
<p>a matrix</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="VIPS-INTERPRETATION-scRGB"></a>VIPS_INTERPRETATION_scRGB</p></td>
<td class="enum_member_description">
<p>pixels are scRGB</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="VIPS-INTERPRETATION-HSV:CAPS"></a>VIPS_INTERPRETATION_HSV</p></td>
<td class="enum_member_description">
<p>pixels are HSV</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="VIPS-INTERPRETATION-LAST:CAPS"></a>VIPS_INTERPRETATION_LAST</p></td>
<td> </td>
<td> </td>
</tr>
</tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="VipsBandFormat"></a><h3>enum VipsBandFormat</h3>
<p>The format used for each band element. </p>
<p>Each corresponds to a native C type for the current machine. For example,
<a class="link" href="VipsImage.html#VIPS-FORMAT-USHORT:CAPS"><span class="type">VIPS_FORMAT_USHORT</span></a> is <span class="type">unsigned short</span>.</p>
<div class="refsect3">
<a name="VipsBandFormat.members"></a><h4>Members</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="300px" class="enum_members_name">
<col class="enum_members_description">
<col width="200px" class="enum_members_annotations">
</colgroup>
<tbody>
<tr>
<td class="enum_member_name"><p><a name="VIPS-FORMAT-NOTSET:CAPS"></a>VIPS_FORMAT_NOTSET</p></td>
<td class="enum_member_description">
<p>invalid setting</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="VIPS-FORMAT-UCHAR:CAPS"></a>VIPS_FORMAT_UCHAR</p></td>
<td class="enum_member_description">
<p>unsigned char format</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="VIPS-FORMAT-CHAR:CAPS"></a>VIPS_FORMAT_CHAR</p></td>
<td class="enum_member_description">
<p>char format</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="VIPS-FORMAT-USHORT:CAPS"></a>VIPS_FORMAT_USHORT</p></td>
<td class="enum_member_description">
<p>unsigned short format</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="VIPS-FORMAT-SHORT:CAPS"></a>VIPS_FORMAT_SHORT</p></td>
<td class="enum_member_description">
<p>short format</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="VIPS-FORMAT-UINT:CAPS"></a>VIPS_FORMAT_UINT</p></td>
<td class="enum_member_description">
<p>unsigned int format</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="VIPS-FORMAT-INT:CAPS"></a>VIPS_FORMAT_INT</p></td>
<td class="enum_member_description">
<p>int format</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="VIPS-FORMAT-FLOAT:CAPS"></a>VIPS_FORMAT_FLOAT</p></td>
<td class="enum_member_description">
<p>float format</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="VIPS-FORMAT-COMPLEX:CAPS"></a>VIPS_FORMAT_COMPLEX</p></td>
<td class="enum_member_description">
<p>complex (two floats) format</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="VIPS-FORMAT-DOUBLE:CAPS"></a>VIPS_FORMAT_DOUBLE</p></td>
<td class="enum_member_description">
<p>double float format</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="VIPS-FORMAT-DPCOMPLEX:CAPS"></a>VIPS_FORMAT_DPCOMPLEX</p></td>
<td class="enum_member_description">
<p>double complex (two double) format</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="VIPS-FORMAT-LAST:CAPS"></a>VIPS_FORMAT_LAST</p></td>
<td> </td>
<td> </td>
</tr>
</tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="VipsCoding"></a><h3>enum VipsCoding</h3>
<p>How pixels are coded. </p>
<p>Normally, pixels are uncoded and can be manipulated as you would expect.
However some file formats code pixels for compression, and sometimes it's
useful to be able to manipulate images in the coded format.</p>
<p>The gaps in the numbering are historical and must be maintained. Allocate
new numbers from the end.</p>
<div class="refsect3">
<a name="VipsCoding.members"></a><h4>Members</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="300px" class="enum_members_name">
<col class="enum_members_description">
<col width="200px" class="enum_members_annotations">
</colgroup>
<tbody>
<tr>
<td class="enum_member_name"><p><a name="VIPS-CODING-ERROR:CAPS"></a>VIPS_CODING_ERROR</p></td>
<td> </td>
<td> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="VIPS-CODING-NONE:CAPS"></a>VIPS_CODING_NONE</p></td>
<td class="enum_member_description">
<p>pixels are not coded</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="VIPS-CODING-LABQ:CAPS"></a>VIPS_CODING_LABQ</p></td>
<td class="enum_member_description">
<p>pixels encode 3 float CIELAB values as 4 uchar</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="VIPS-CODING-RAD:CAPS"></a>VIPS_CODING_RAD</p></td>
<td class="enum_member_description">
<p>pixels encode 3 float RGB as 4 uchar (Radiance coding)</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="VIPS-CODING-LAST:CAPS"></a>VIPS_CODING_LAST</p></td>
<td> </td>
<td> </td>
</tr>
</tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="VipsAccess"></a><h3>enum VipsAccess</h3>
<p>The type of access an operation has to supply. See <a class="link" href="libvips-conversion.html#vips-tilecache" title="vips_tilecache ()"><code class="function">vips_tilecache()</code></a>
and <a class="link" href="VipsForeignSave.html#VipsForeign"><span class="type">VipsForeign</span></a>. </p>
<p><em class="parameter"><code>VIPS_ACCESS_RANDOM</code></em>
means requests can come in any order. </p>
<p><em class="parameter"><code>VIPS_ACCESS_SEQUENTIAL</code></em>
means requests will be top-to-bottom, but with some
amount of buffering behind the read point for small non-local accesses. </p>
<p><em class="parameter"><code>VIPS_ACCESS_SEQUENTIAL_UNBUFFERED</code></em>
means requests will be strictly
top-to-bottom with no read-behind. This can save some memory.</p>
<div class="refsect3">
<a name="VipsAccess.members"></a><h4>Members</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="300px" class="enum_members_name">
<col class="enum_members_description">
<col width="200px" class="enum_members_annotations">
</colgroup>
<tbody>
<tr>
<td class="enum_member_name"><p><a name="VIPS-ACCESS-RANDOM:CAPS"></a>VIPS_ACCESS_RANDOM</p></td>
<td class="enum_member_description">
<p>can read anywhere</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="VIPS-ACCESS-SEQUENTIAL:CAPS"></a>VIPS_ACCESS_SEQUENTIAL</p></td>
<td class="enum_member_description">
<p>top-to-bottom reading only, but with a small buffer</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="VIPS-ACCESS-SEQUENTIAL-UNBUFFERED:CAPS"></a>VIPS_ACCESS_SEQUENTIAL_UNBUFFERED</p></td>
<td class="enum_member_description">
<p>top-to-bottom reading only</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="VIPS-ACCESS-LAST:CAPS"></a>VIPS_ACCESS_LAST</p></td>
<td> </td>
<td> </td>
</tr>
</tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="VipsProgress"></a><h3>VipsProgress</h3>
<pre class="programlisting">typedef struct {
int run; /* Time we have been running */
int eta; /* Estimated seconds of computation left */
gint64 tpels; /* Number of pels we expect to calculate */
gint64 npels; /* Number of pels calculated so far */
int percent; /* Percent complete */
GTimer *start; /* Start time */
} VipsProgress;
</pre>
<p>A structure available to eval callbacks giving information on evaluation
progress. See <a class="link" href="VipsImage.html#VipsImage-eval" title="The “eval” signal"><span class="type">“eval”</span></a>.</p>
<div class="refsect3">
<a name="VipsProgress.members"></a><h4>Members</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="300px" class="struct_members_name">
<col class="struct_members_description">
<col width="200px" class="struct_members_annotations">
</colgroup>
<tbody>
<tr>
<td class="struct_member_name"><p><span class="type">int</span> <em class="structfield"><code><a name="VipsProgress.run"></a>run</code></em>;</p></td>
<td class="struct_member_description"><p>Time we have been running </p></td>
<td class="struct_member_annotations"> </td>
</tr>
<tr>
<td class="struct_member_name"><p><span class="type">int</span> <em class="structfield"><code><a name="VipsProgress.eta"></a>eta</code></em>;</p></td>
<td class="struct_member_description"><p>Estimated seconds of computation left </p></td>
<td class="struct_member_annotations"> </td>
</tr>
<tr>
<td class="struct_member_name"><p><span class="type">gint64</span> <em class="structfield"><code><a name="VipsProgress.tpels"></a>tpels</code></em>;</p></td>
<td class="struct_member_description"><p>Number of pels we expect to calculate</p></td>
<td class="struct_member_annotations"> </td>
</tr>
<tr>
<td class="struct_member_name"><p><span class="type">gint64</span> <em class="structfield"><code><a name="VipsProgress.npels"></a>npels</code></em>;</p></td>
<td class="struct_member_description"><p>Number of pels calculated so far</p></td>
<td class="struct_member_annotations"> </td>
</tr>
<tr>
<td class="struct_member_name"><p><span class="type">int</span> <em class="structfield"><code><a name="VipsProgress.percent"></a>percent</code></em>;</p></td>
<td class="struct_member_description"><p>Percent complete</p></td>
<td class="struct_member_annotations"> </td>
</tr>
<tr>
<td class="struct_member_name"><p><span class="type">GTimer</span> *<em class="structfield"><code><a name="VipsProgress.start"></a>start</code></em>;</p></td>
<td class="struct_member_description"><p>Start time </p></td>
<td class="struct_member_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
</div>
</div>
<div class="refsect1">
<a name="VipsImage.property-details"></a><h2>Property Details</h2>
<div class="refsect2">
<a name="VipsImage--bands"></a><h3>The <code class="literal">“bands”</code> property</h3>
<pre class="programlisting"> “bands” <span class="type">gint</span></pre>
<p>Number of bands in image.</p>
<p>Flags: Read / Write</p>
<p>Allowed values: [1,10000000]</p>
<p>Default value: 1</p>
</div>
<hr>
<div class="refsect2">
<a name="VipsImage--coding"></a><h3>The <code class="literal">“coding”</code> property</h3>
<pre class="programlisting"> “coding” <a class="link" href="VipsImage.html#VipsCoding" title="enum VipsCoding"><span class="type">VipsCoding</span></a></pre>
<p>Pixel coding.</p>
<p>Flags: Read / Write</p>
<p>Default value: VIPS_CODING_NONE</p>
</div>
<hr>
<div class="refsect2">
<a name="VipsImage--demand"></a><h3>The <code class="literal">“demand”</code> property</h3>
<pre class="programlisting"> “demand” <a class="link" href="VipsImage.html#VipsDemandStyle" title="enum VipsDemandStyle"><span class="type">VipsDemandStyle</span></a></pre>
<p>Preferred demand style for this image.</p>
<p>Flags: Read / Write</p>
<p>Default value: VIPS_DEMAND_STYLE_SMALLTILE</p>
</div>
<hr>
<div class="refsect2">
<a name="VipsImage--filename"></a><h3>The <code class="literal">“filename”</code> property</h3>
<pre class="programlisting"> “filename” <span class="type">gchar</span> *</pre>
<p>Image filename.</p>
<p>Flags: Read / Write</p>
<p>Default value: NULL</p>
</div>
<hr>
<div class="refsect2">
<a name="VipsImage--foreign-buffer"></a><h3>The <code class="literal">“foreign-buffer”</code> property</h3>
<pre class="programlisting"> “foreign-buffer” <span class="type">gpointer</span></pre>
<p>Pointer to foreign pixels.</p>
<p>Flags: Read / Write</p>
</div>
<hr>
<div class="refsect2">
<a name="VipsImage--format"></a><h3>The <code class="literal">“format”</code> property</h3>
<pre class="programlisting"> “format” <a class="link" href="VipsImage.html#VipsBandFormat" title="enum VipsBandFormat"><span class="type">VipsBandFormat</span></a></pre>
<p>Pixel format in image.</p>
<p>Flags: Read / Write</p>
<p>Default value: VIPS_FORMAT_UCHAR</p>
</div>
<hr>
<div class="refsect2">
<a name="VipsImage--height"></a><h3>The <code class="literal">“height”</code> property</h3>
<pre class="programlisting"> “height” <span class="type">gint</span></pre>
<p>Image height in pixels.</p>
<p>Flags: Read / Write</p>
<p>Allowed values: [1,10000000]</p>
<p>Default value: 1</p>
</div>
<hr>
<div class="refsect2">
<a name="VipsImage--interpretation"></a><h3>The <code class="literal">“interpretation”</code> property</h3>
<pre class="programlisting"> “interpretation” <a class="link" href="VipsImage.html#VipsInterpretation" title="enum VipsInterpretation"><span class="type">VipsInterpretation</span></a></pre>
<p>Pixel interpretation.</p>
<p>Flags: Read / Write</p>
<p>Default value: VIPS_INTERPRETATION_MULTIBAND</p>
</div>
<hr>
<div class="refsect2">
<a name="VipsImage--kill"></a><h3>The <code class="literal">“kill”</code> property</h3>
<pre class="programlisting"> “kill” <span class="type">gboolean</span></pre>
<p>Block evaluation on this image.</p>
<p>Flags: Read / Write</p>
<p>Default value: FALSE</p>
</div>
<hr>
<div class="refsect2">
<a name="VipsImage--mode"></a><h3>The <code class="literal">“mode”</code> property</h3>
<pre class="programlisting"> “mode” <span class="type">gchar</span> *</pre>
<p>Open mode.</p>
<p>Flags: Read / Write</p>
<p>Default value: "p"</p>
</div>
<hr>
<div class="refsect2">
<a name="VipsImage--sizeof-header"></a><h3>The <code class="literal">“sizeof-header”</code> property</h3>
<pre class="programlisting"> “sizeof-header” <span class="type">guint64</span></pre>
<p>Offset in bytes from start of file.</p>
<p>Flags: Read / Write</p>
<p>Allowed values: <= 1000000000</p>
<p>Default value: 64</p>
</div>
<hr>
<div class="refsect2">
<a name="VipsImage--width"></a><h3>The <code class="literal">“width”</code> property</h3>
<pre class="programlisting"> “width” <span class="type">gint</span></pre>
<p>Image width in pixels.</p>
<p>Flags: Read / Write</p>
<p>Allowed values: [1,10000000]</p>
<p>Default value: 1</p>
</div>
<hr>
<div class="refsect2">
<a name="VipsImage--xoffset"></a><h3>The <code class="literal">“xoffset”</code> property</h3>
<pre class="programlisting"> “xoffset” <span class="type">gint</span></pre>
<p>Horizontal offset of origin.</p>
<p>Flags: Read / Write</p>
<p>Allowed values: [-10000000,10000000]</p>
<p>Default value: 0</p>
</div>
<hr>
<div class="refsect2">
<a name="VipsImage--xres"></a><h3>The <code class="literal">“xres”</code> property</h3>
<pre class="programlisting"> “xres” <span class="type">gdouble</span></pre>
<p>Horizontal resolution in pixels/mm.</p>
<p>Flags: Read / Write</p>
<p>Allowed values: [-0,1e+06]</p>
<p>Default value: 0</p>
</div>
<hr>
<div class="refsect2">
<a name="VipsImage--yoffset"></a><h3>The <code class="literal">“yoffset”</code> property</h3>
<pre class="programlisting"> “yoffset” <span class="type">gint</span></pre>
<p>Vertical offset of origin.</p>
<p>Flags: Read / Write</p>
<p>Allowed values: [-10000000,10000000]</p>
<p>Default value: 0</p>
</div>
<hr>
<div class="refsect2">
<a name="VipsImage--yres"></a><h3>The <code class="literal">“yres”</code> property</h3>
<pre class="programlisting"> “yres” <span class="type">gdouble</span></pre>
<p>Vertical resolution in pixels/mm.</p>
<p>Flags: Read / Write</p>
<p>Allowed values: [-0,1e+06]</p>
<p>Default value: 0</p>
</div>
</div>
<div class="refsect1">
<a name="VipsImage.signal-details"></a><h2>Signal Details</h2>
<div class="refsect2">
<a name="VipsImage-eval"></a><h3>The <code class="literal">“eval”</code> signal</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
user_function (<a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a> *image,
<span class="type">gpointer</span> progress,
<span class="type">gpointer</span> user_data)</pre>
<p>The ::eval signal is emitted once per work unit (typically a 128 x
128 area of pixels) during image computation. </p>
<p>You can use this signal to update user-interfaces with progress
feedback. Beware of updating too frequently: you will usually
need some throttling mechanism.</p>
<p>Use <a class="link" href="VipsImage.html#vips-image-set-progress" title="vips_image_set_progress ()"><code class="function">vips_image_set_progress()</code></a> to turn on progress reporting for an
image.</p>
<div class="refsect3">
<a name="VipsImage-eval.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>image</p></td>
<td class="parameter_description"><p>the image being calculated</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>progress</p></td>
<td class="parameter_description"><p><a class="link" href="VipsImage.html#VipsProgress" title="VipsProgress"><span class="type">VipsProgress</span></a> for this image</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>user_data</p></td>
<td class="parameter_description"><p>user data set when the signal handler was connected.</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<p>Flags: Run Last</p>
</div>
<hr>
<div class="refsect2">
<a name="VipsImage-invalidate"></a><h3>The <code class="literal">“invalidate”</code> signal</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
user_function (<a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a> *image,
<span class="type">gpointer</span> user_data)</pre>
<p>The ::invalidate signal is emitted when an image or one of it's
upstream data sources has been destructively modified. See
<a class="link" href="VipsImage.html#vips-image-invalidate-all" title="vips_image_invalidate_all ()"><code class="function">vips_image_invalidate_all()</code></a>.</p>
<div class="refsect3">
<a name="VipsImage-invalidate.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>image</p></td>
<td class="parameter_description"><p>the image that has changed</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>user_data</p></td>
<td class="parameter_description"><p>user data set when the signal handler was connected.</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<p>Flags: Action</p>
</div>
<hr>
<div class="refsect2">
<a name="VipsImage-minimise"></a><h3>The <code class="literal">“minimise”</code> signal</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
user_function (<a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a> *image,
<span class="type">gpointer</span> user_data)</pre>
<p>The ::minimise signal is emitted when an image has been asked to
minimise memory usage. All non-essential caches are dropped.
See
<a class="link" href="VipsImage.html#vips-image-minimise-all" title="vips_image_minimise_all ()"><code class="function">vips_image_minimise_all()</code></a>.</p>
<div class="refsect3">
<a name="VipsImage-minimise.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>image</p></td>
<td class="parameter_description"><p>the image that is being minimised</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>user_data</p></td>
<td class="parameter_description"><p>user data set when the signal handler was connected.</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<p>Flags: Action</p>
</div>
<hr>
<div class="refsect2">
<a name="VipsImage-posteval"></a><h3>The <code class="literal">“posteval”</code> signal</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
user_function (<a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a> *image,
<span class="type">gpointer</span> progress,
<span class="type">gpointer</span> user_data)</pre>
<p>The ::posteval signal is emitted once at the end of the computation
of <em class="parameter"><code>image</code></em>
. It's a good place to shut down evaluation feedback.</p>
<p>Use <a class="link" href="VipsImage.html#vips-image-set-progress" title="vips_image_set_progress ()"><code class="function">vips_image_set_progress()</code></a> to turn on progress reporting for an
image.</p>
<div class="refsect3">
<a name="VipsImage-posteval.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>image</p></td>
<td class="parameter_description"><p>the image that was calculated</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>progress</p></td>
<td class="parameter_description"><p><a class="link" href="VipsImage.html#VipsProgress" title="VipsProgress"><span class="type">VipsProgress</span></a> for this image</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>user_data</p></td>
<td class="parameter_description"><p>user data set when the signal handler was connected.</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<p>Flags: Run Last</p>
</div>
<hr>
<div class="refsect2">
<a name="VipsImage-preeval"></a><h3>The <code class="literal">“preeval”</code> signal</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
user_function (<a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a> *image,
<span class="type">gpointer</span> progress,
<span class="type">gpointer</span> user_data)</pre>
<p>The ::preeval signal is emitted once before computation of <em class="parameter"><code>image</code></em>
starts. It's a good place to set up evaluation feedback.</p>
<p>Use <a class="link" href="VipsImage.html#vips-image-set-progress" title="vips_image_set_progress ()"><code class="function">vips_image_set_progress()</code></a> to turn on progress reporting for an
image.</p>
<div class="refsect3">
<a name="VipsImage-preeval.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>image</p></td>
<td class="parameter_description"><p>the image to be calculated</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>progress</p></td>
<td class="parameter_description"><p><a class="link" href="VipsImage.html#VipsProgress" title="VipsProgress"><span class="type">VipsProgress</span></a> for this image</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>user_data</p></td>
<td class="parameter_description"><p>user data set when the signal handler was connected.</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<p>Flags: Run Last</p>
</div>
<hr>
<div class="refsect2">
<a name="VipsImage-written"></a><h3>The <code class="literal">“written”</code> signal</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
user_function (<a class="link" href="VipsImage.html" title="VipsImage"><span class="type">VipsImage</span></a> *image,
<span class="type">gpointer</span> result,
<span class="type">gpointer</span> user_data)</pre>
<p>The ::written signal is emitted just after an image has been
written to. It is
used by vips to implement things like write to foreign file
formats.</p>
<div class="refsect3">
<a name="VipsImage-written.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>image</p></td>
<td class="parameter_description"><p>the image that was calculated</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>result</p></td>
<td class="parameter_description"><p>set to non-zero to indicate error</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>user_data</p></td>
<td class="parameter_description"><p>user data set when the signal handler was connected.</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<p>Flags: Action</p>
</div>
</div>
<div class="refsect1">
<a name="VipsImage.see-also"></a><h2>See Also</h2>
<a class="link" href="libvips-header.html" title="header">header</a><a class="link" href="VipsRegion.html" title="VipsRegion">VipsRegion</a><a class="link" href="libvips-generate.html" title="generate">generate</a><a class="link" href="VipsOperation.html" title="VipsOperation">VipsOperation</a>
</div>
</div>
<div class="footer">
<hr>Generated by GTK-Doc V1.25</div>
</body>
</html>
|