DXR is a code search and navigation tool aimed at making sense of large projects. It supports full-text and regex searches as well as structural queries.

Mercurial (5216dd412535)

VCS Links

Line Code
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
/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 * http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is mozilla.org code.
 *
 * The Initial Developer of the Original Code is
 *   Mozilla Corporation.
 * Portions created by the Initial Developer are Copyright (C) 2010
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *   Vladimir Vukicevic <vladimir@pobox.com>
 *   Mark Steele <mwsteele@gmail.com>
 *   Bas Schouten <bschouten@mozilla.com>
 *   Frederic Plourde <frederic.plourde@collabora.co.uk>
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either the GNU General Public License Version 2 or later (the "GPL"), or
 * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
 * of those above. If you wish to allow use of your version of this file only
 * under the terms of either the GPL or the LGPL, and not to allow others to
 * use your version of this file under the terms of the MPL, indicate your
 * decision by deleting the provisions above and replace them with the notice
 * and other provisions required by the GPL or the LGPL. If you do not delete
 * the provisions above, a recipient may use your version of this file under
 * the terms of any one of the MPL, the GPL or the LGPL.
 *
 * ***** END LICENSE BLOCK ***** */

#if defined(MOZ_X11)

#ifdef MOZ_WIDGET_GTK2
#include <gdk/gdkx.h>
// we're using default display for now
#define GET_NATIVE_WINDOW(aWidget) (EGLNativeWindowType)GDK_WINDOW_XID((GdkWindow *) aWidget->GetNativeData(NS_NATIVE_WINDOW))
#elif defined(MOZ_WIDGET_QT)
#include <QWidget>
#include <QtOpenGL/QGLWidget>
#define GLdouble_defined 1
// we're using default display for now
#define GET_NATIVE_WINDOW(aWidget) (EGLNativeWindowType)static_cast<QWidget*>(aWidget->GetNativeData(NS_NATIVE_SHELLWIDGET))->handle()
#endif

#include <X11/Xlib.h>
#include <X11/Xutil.h>
#include "mozilla/X11Util.h"
#include "gfxXlibSurface.h"
typedef Display *EGLNativeDisplayType;
typedef Pixmap   EGLNativePixmapType;
typedef Window   EGLNativeWindowType;

#define EGL_LIB "/usr/lib/libEGL.so"
#define GLES2_LIB "/usr/lib/libGLESv2.so"

#elif defined(ANDROID)

/* from widget */
#include "AndroidBridge.h"

typedef void *EGLNativeDisplayType;
typedef void *EGLNativePixmapType;
typedef void *EGLNativeWindowType;

#define EGL_LIB "/system/lib/libEGL.so"
#define GLES2_LIB "/system/lib/libGLESv2.so"

#elif defined(XP_WIN)

#include "nsServiceManagerUtils.h"
#include "nsIPrefBranch.h"
#include "nsILocalFile.h"

#ifndef WIN32_LEAN_AND_MEAN
#define WIN32_LEAN_AND_MEAN 1
#endif

#include <windows.h>

typedef HDC EGLNativeDisplayType;
typedef HBITMAP EGLNativePixmapType;
typedef HWND EGLNativeWindowType;

#define GET_NATIVE_WINDOW(aWidget) ((EGLNativeWindowType)aWidget->GetNativeData(NS_NATIVE_WINDOW))

#define EGL_LIB "libEGL.dll"
#define GLES2_LIB "libGLESv2.dll"

// a little helper
class AutoDestroyHWND {
public:
    AutoDestroyHWND(HWND aWnd = NULL)
        : mWnd(aWnd)
    {
    }

    ~AutoDestroyHWND() {
        if (mWnd) {
            ::DestroyWindow(mWnd);
        }
    }

    operator HWND() {
        return mWnd;
    }

    HWND forget() {
        HWND w = mWnd;
        mWnd = NULL;
        return w;
    }

    HWND operator=(HWND aWnd) {
        if (mWnd && mWnd != aWnd) {
            ::DestroyWindow(mWnd);
        }
        mWnd = aWnd;
        return mWnd;
    }

    HWND mWnd;
};

#else

#error "Platform not recognized"

#endif

#include "gfxUtils.h"
#include "gfxASurface.h"
#include "gfxImageSurface.h"
#include "gfxPlatform.h"
#include "GLContextProvider.h"
#include "nsDebug.h"
#include "nsThreadUtils.h"
#include "EGLUtils.h"

#include "nsIWidget.h"

#include "gfxCrashReporterUtils.h"

#ifdef MOZ_PLATFORM_MAEMO
static bool gUseBackingSurface = true;
#else
static bool gUseBackingSurface = false;
#endif

namespace mozilla {
namespace gl {

typedef int EGLint;
typedef unsigned int EGLBoolean;
typedef unsigned int EGLenum;
typedef void *EGLConfig;
typedef void *EGLContext;
typedef void *EGLDisplay;
typedef void *EGLSurface;
typedef void *EGLClientBuffer;
typedef void *EGLCastToRelevantPtr;
typedef void *EGLImageKHR;
typedef void *GLeglImageOES;

#define EGL_DEFAULT_DISPLAY  ((EGLNativeDisplayType)0)
#define EGL_NO_CONTEXT       ((EGLContext)0)
#define EGL_NO_DISPLAY       ((EGLDisplay)0)
#define EGL_NO_SURFACE       ((EGLSurface)0)

#define EGL_DISPLAY()        sEGLLibrary.Display()

#define ADD_ATTR_2(_array, _k, _v) do {         \
    (_array).AppendElement(_k);                 \
    (_array).AppendElement(_v);                 \
} while (0)

#define ADD_ATTR_1(_array, _k) do {             \
    (_array).AppendElement(_k);                 \
} while (0)

EGLSurface
CreateSurfaceForWindow(nsIWidget *aWidget, EGLConfig config);
EGLConfig
CreateConfig();
#ifdef MOZ_X11
static EGLConfig
CreateEGLSurfaceForXSurface(gfxASurface* aSurface, EGLConfig* aConfig = nsnull);
#endif

static int
next_power_of_two(int v)
{
    v--;
    v |= v >> 1;
    v |= v >> 2;
    v |= v >> 4;
    v |= v >> 8;
    v |= v >> 16;
    v++;

    return v;
}

static bool
is_power_of_two(int v)
{
    NS_ASSERTION(v >= 0, "bad value");

    if (v == 0)
        return true;

    return (v & (v-1)) == 0;
}

static class EGLLibrary
{
public:
    EGLLibrary() 
        : mInitialized(PR_FALSE),
          mEGLLibrary(nsnull)
    {
        mIsANGLE = PR_FALSE;
        mHave_EGL_KHR_image_base = PR_FALSE;
        mHave_EGL_KHR_image_pixmap = PR_FALSE;
        mHave_EGL_KHR_gl_texture_2D_image = PR_FALSE;
        mHave_EGL_KHR_lock_surface = PR_FALSE;
        mHave_EGL_ANGLE_surface_d3d_share_handle = PR_FALSE;
    }

    typedef EGLDisplay (GLAPIENTRY * pfnGetDisplay)(void *display_id);
    pfnGetDisplay fGetDisplay;
    typedef EGLContext (GLAPIENTRY * pfnGetCurrentContext)(void);
    pfnGetCurrentContext fGetCurrentContext;
    typedef EGLBoolean (GLAPIENTRY * pfnMakeCurrent)(EGLDisplay dpy, EGLSurface draw, EGLSurface read, EGLContext ctx);
    pfnMakeCurrent fMakeCurrent;
    typedef EGLBoolean (GLAPIENTRY * pfnDestroyContext)(EGLDisplay dpy, EGLContext ctx);
    pfnDestroyContext fDestroyContext;
    typedef EGLContext (GLAPIENTRY * pfnCreateContext)(EGLDisplay dpy, EGLConfig config, EGLContext share_context, const EGLint *attrib_list);
    pfnCreateContext fCreateContext;
    typedef EGLBoolean (GLAPIENTRY * pfnDestroySurface)(EGLDisplay dpy, EGLSurface surface);
    pfnDestroySurface fDestroySurface;
    typedef EGLSurface (GLAPIENTRY * pfnCreateWindowSurface)(EGLDisplay dpy, EGLConfig config, EGLNativeWindowType win, const EGLint *attrib_list);
    pfnCreateWindowSurface fCreateWindowSurface;
    typedef EGLSurface (GLAPIENTRY * pfnCreatePbufferSurface)(EGLDisplay dpy, EGLConfig config, const EGLint *attrib_list);
    pfnCreatePbufferSurface fCreatePbufferSurface;
    typedef EGLSurface (GLAPIENTRY * pfnCreatePixmapSurface)(EGLDisplay dpy, EGLConfig config, EGLNativePixmapType pixmap, const EGLint *attrib_list);
    pfnCreatePixmapSurface fCreatePixmapSurface;
    typedef EGLBoolean (GLAPIENTRY * pfnBindAPI)(EGLenum api);
    pfnBindAPI fBindAPI;
    typedef EGLBoolean (GLAPIENTRY * pfnInitialize)(EGLDisplay dpy, EGLint *major, EGLint *minor);
    pfnInitialize fInitialize;
    typedef EGLBoolean (GLAPIENTRY * pfnChooseConfig)(EGLDisplay dpy, const EGLint *attrib_list, EGLConfig *configs, EGLint config_size, EGLint *num_config);
    pfnChooseConfig fChooseConfig;
    typedef EGLint (GLAPIENTRY * pfnGetError)(void);
    pfnGetError fGetError;
    typedef EGLBoolean (GLAPIENTRY * pfnGetConfigAttrib)(EGLDisplay dpy, EGLConfig config, EGLint attribute, EGLint *value);
    pfnGetConfigAttrib fGetConfigAttrib;
    typedef EGLBoolean (GLAPIENTRY * pfnGetConfigs)(EGLDisplay dpy, EGLConfig *configs, EGLint config_size, EGLint *num_config);
    pfnGetConfigs fGetConfigs;
    typedef EGLBoolean (GLAPIENTRY * pfnWaitNative)(EGLint engine);
    pfnWaitNative fWaitNative;
    typedef EGLCastToRelevantPtr (GLAPIENTRY * pfnGetProcAddress)(const char *procname);
    pfnGetProcAddress fGetProcAddress;
    typedef EGLBoolean (GLAPIENTRY * pfnSwapBuffers)(EGLDisplay dpy, EGLSurface surface);
    pfnSwapBuffers fSwapBuffers;
    typedef EGLBoolean (GLAPIENTRY * pfnCopyBuffers)(EGLDisplay dpy, EGLSurface surface,
                                                     EGLNativePixmapType target);
    pfnCopyBuffers fCopyBuffers;
    typedef const GLubyte* (GLAPIENTRY * pfnQueryString)(EGLDisplay, EGLint name);
    pfnQueryString fQueryString;
    typedef EGLBoolean (GLAPIENTRY * pfnQueryContext)(EGLDisplay dpy, EGLContext ctx,
                                                      EGLint attribute, EGLint *value);
    pfnQueryContext fQueryContext;
    typedef EGLBoolean (GLAPIENTRY * pfnBindTexImage)(EGLDisplay, EGLSurface surface, EGLint buffer);
    pfnBindTexImage fBindTexImage;
    typedef EGLBoolean (GLAPIENTRY * pfnReleaseTexImage)(EGLDisplay, EGLSurface surface, EGLint buffer);
    pfnReleaseTexImage fReleaseTexImage;
    typedef EGLImageKHR (GLAPIENTRY * pfnCreateImageKHR)(EGLDisplay dpy, EGLContext ctx, EGLenum target, EGLClientBuffer buffer, const EGLint *attrib_list);
    pfnCreateImageKHR fCreateImageKHR;
    typedef EGLBoolean (GLAPIENTRY * pfnDestroyImageKHR)(EGLDisplay dpy, EGLImageKHR image);
    pfnDestroyImageKHR fDestroyImageKHR;

    // New extension which allow us to lock texture and get raw image pointer
    typedef EGLBoolean (GLAPIENTRY * pfnLockSurfaceKHR)(EGLDisplay dpy, EGLSurface surface, const EGLint *attrib_list);
    pfnLockSurfaceKHR fLockSurfaceKHR;
    typedef EGLBoolean (GLAPIENTRY * pfnUnlockSurfaceKHR)(EGLDisplay dpy, EGLSurface surface);
    pfnUnlockSurfaceKHR fUnlockSurfaceKHR;
    typedef EGLBoolean (GLAPIENTRY * pfnQuerySurface)(EGLDisplay dpy, EGLSurface surface, EGLint attribute, EGLint *value);
    pfnQuerySurface fQuerySurface;

    typedef EGLBoolean (GLAPIENTRY * pfnQuerySurfacePointerANGLE)(EGLDisplay dpy, EGLSurface surface, EGLint attribute, void **value);
    pfnQuerySurfacePointerANGLE fQuerySurfacePointerANGLE;

    // This is EGL specific GL ext symbol "glEGLImageTargetTexture2DOES"
    // Lets keep it here for now.
    typedef void (GLAPIENTRY * pfnImageTargetTexture2DOES)(GLenum target, GLeglImageOES image);
    pfnImageTargetTexture2DOES fImageTargetTexture2DOES;

    PRBool EnsureInitialized()
    {
        if (mInitialized) {
            return PR_TRUE;
        }

        mozilla::ScopedGfxFeatureReporter reporter("EGL");

#ifdef XP_WIN
        // Allow for explicitly specifying the location of libEGL.dll and
        // libGLESv2.dll.
        do {
            nsCOMPtr<nsIPrefBranch> prefs = do_GetService("@mozilla.org/preferences-service;1");
            nsCOMPtr<nsILocalFile> eglFile, glesv2File;
            if (!prefs)
                break;

            nsresult rv = prefs->GetComplexValue("gfx.angle.egl.path",
                                                 NS_GET_IID(nsILocalFile),
                                                 getter_AddRefs(eglFile));
            if (NS_FAILED(rv) || !eglFile)
                break;

            nsCAutoString s;

            // note that we have to load the libs in this order, because libEGL.dll
            // depends on libGLESv2.dll, but is not/may not be in our search path.
            nsCOMPtr<nsIFile> f;
            eglFile->Clone(getter_AddRefs(f));
            glesv2File = do_QueryInterface(f);
            if (!glesv2File)
                break;

            glesv2File->Append(NS_LITERAL_STRING("libGLESv2.dll"));

            PRLibrary *glesv2lib = nsnull; // this will be leaked on purpose
            glesv2File->Load(&glesv2lib);
            if (!glesv2lib)
                break;

            eglFile->Append(NS_LITERAL_STRING("libEGL.dll"));
            eglFile->Load(&mEGLLibrary);
        } while (false);
#endif

        if (!mEGLLibrary) {
            mEGLLibrary = PR_LoadLibrary(EGL_LIB);
        }

        if (!mEGLLibrary) {
            NS_WARNING("Couldn't load EGL LIB.");
            return PR_FALSE;
        }

#define SYMBOL(name) \
    { (PRFuncPtr*) &f##name, { "egl" #name, NULL } }

        LibrarySymbolLoader::SymLoadStruct earlySymbols[] = {
            SYMBOL(GetDisplay),
            SYMBOL(GetCurrentContext),
            SYMBOL(MakeCurrent),
            SYMBOL(DestroyContext),
            SYMBOL(CreateContext),
            SYMBOL(DestroySurface),
            SYMBOL(CreateWindowSurface),
            SYMBOL(CreatePbufferSurface),
            SYMBOL(CreatePixmapSurface),
            SYMBOL(BindAPI),
            SYMBOL(Initialize),
            SYMBOL(ChooseConfig),
            SYMBOL(GetError),
            SYMBOL(GetConfigs),
            SYMBOL(GetConfigAttrib),
            SYMBOL(WaitNative),
            SYMBOL(GetProcAddress),
            SYMBOL(SwapBuffers),
            SYMBOL(CopyBuffers),
            SYMBOL(QueryString),
            SYMBOL(QueryContext),
            SYMBOL(BindTexImage),
            SYMBOL(ReleaseTexImage),
            SYMBOL(QuerySurface),
            { NULL, { NULL } }
        };

        if (!LibrarySymbolLoader::LoadSymbols(mEGLLibrary, &earlySymbols[0])) {
            NS_WARNING("Couldn't find required entry points in EGL library (early init)");
            return PR_FALSE;
        }

        mEGLDisplay = fGetDisplay(EGL_DEFAULT_DISPLAY);
        if (!fInitialize(mEGLDisplay, NULL, NULL))
            return PR_FALSE;

        const char *version = (const char*) fQueryString(mEGLDisplay, LOCAL_EGL_VERSION);
        if (version && strstr(version, "ANGLE") != 0) {
            mIsANGLE = PR_TRUE;
        }
        
        const char *extensions = (const char*) fQueryString(mEGLDisplay, LOCAL_EGL_EXTENSIONS);
        if (!extensions)
            extensions = "";

        printf_stderr("Extensions: %s 0x%02x\n", extensions, extensions[0]);
        printf_stderr("Extensions length: %d\n", strlen(extensions));

        // note the extra space -- this ugliness tries to match
        // EGL_KHR_image in the middle of the string, or right at the
        // end.  It's a prefix for other extensions, so we have to do
        // this...
        PRBool hasKHRImage = PR_FALSE;
        if (strstr(extensions, "EGL_KHR_image ") ||
            (strlen(extensions) >= strlen("EGL_KHR_image") &&
             strcmp(extensions+(strlen(extensions)-strlen("EGL_KHR_image")), "EGL_KHR_image")))
        {
            hasKHRImage = PR_TRUE;
        }

        if (strstr(extensions, "EGL_KHR_image_base")) {
            mHave_EGL_KHR_image_base = PR_TRUE;
        }
            
        if (strstr(extensions, "EGL_KHR_image_pixmap")) {
            mHave_EGL_KHR_image_pixmap = PR_TRUE;
            
        }

        if (strstr(extensions, "EGL_KHR_gl_texture_2D_image")) {
            mHave_EGL_KHR_gl_texture_2D_image = PR_TRUE;
        }

        if (strstr(extensions, "EGL_KHR_lock_surface")) {
            mHave_EGL_KHR_lock_surface = PR_TRUE;
        }

        if (hasKHRImage) {
            LibrarySymbolLoader::SymLoadStruct khrSymbols[] = {
                { (PRFuncPtr*) &fCreateImageKHR, { "eglCreateImageKHR", NULL } },
                { (PRFuncPtr*) &fDestroyImageKHR, { "eglDestroyImageKHR", NULL } },
                { (PRFuncPtr*) &fImageTargetTexture2DOES, { "glEGLImageTargetTexture2DOES", NULL } },
                { NULL, { NULL } }
            };

            LibrarySymbolLoader::LoadSymbols(mEGLLibrary, &khrSymbols[0],
                                             (LibrarySymbolLoader::PlatformLookupFunction)fGetProcAddress);
        }

        if (mHave_EGL_KHR_lock_surface) {
            LibrarySymbolLoader::SymLoadStruct lockSymbols[] = {
                { (PRFuncPtr*) &fLockSurfaceKHR, { "eglLockSurfaceKHR", NULL } },
                { (PRFuncPtr*) &fUnlockSurfaceKHR, { "eglUnlockSurfaceKHR", NULL } },
                { NULL, { NULL } }
            };

            LibrarySymbolLoader::LoadSymbols(mEGLLibrary, &lockSymbols[0],
                                             (LibrarySymbolLoader::PlatformLookupFunction)fGetProcAddress);
            if (!fLockSurfaceKHR) {
                mHave_EGL_KHR_lock_surface = PR_FALSE;
            }
        }

        if (!fCreateImageKHR) {
            mHave_EGL_KHR_image_base = PR_FALSE;
            mHave_EGL_KHR_image_pixmap = PR_FALSE;
            mHave_EGL_KHR_gl_texture_2D_image = PR_FALSE;
        }

        if (!fImageTargetTexture2DOES) {
            mHave_EGL_KHR_gl_texture_2D_image = PR_FALSE;
        }

        if (strstr(extensions, "EGL_ANGLE_surface_d3d_share_handle")) {
            LibrarySymbolLoader::SymLoadStruct d3dSymbols[] = {
                { (PRFuncPtr*) &fQuerySurfacePointerANGLE, { "eglQuerySurfacePointerANGLE", NULL } },
                { NULL, { NULL } }
            };

            LibrarySymbolLoader::LoadSymbols(mEGLLibrary, &d3dSymbols[0],
                                             (LibrarySymbolLoader::PlatformLookupFunction)fGetProcAddress);
            if (fQuerySurfacePointerANGLE) {
                mHave_EGL_ANGLE_surface_d3d_share_handle = PR_TRUE;
            }
        }

        mInitialized = PR_TRUE;
        reporter.SetSuccessful();
        return PR_TRUE;
    }

    EGLDisplay Display() {
        return mEGLDisplay;
    }

    PRBool IsANGLE() {
        return mIsANGLE;
    }

    PRBool HasKHRImageBase() {
        return mHave_EGL_KHR_image_base;
    }

    PRBool HasKHRImagePixmap() {
        return mHave_EGL_KHR_image_pixmap;
    }

    PRBool HasKHRImageTexture2D() {
        return mHave_EGL_KHR_gl_texture_2D_image;
    }

    PRBool HasKHRLockSurface() {
        return mHave_EGL_KHR_lock_surface;
    }

    PRBool HasANGLESurfaceD3DShareHandle() {
        return mHave_EGL_ANGLE_surface_d3d_share_handle;
    }

    void
    DumpEGLConfig(EGLConfig cfg)
    {
        int attrval;
        int err;

#define ATTR(_x) do {                                                   \
            fGetConfigAttrib(mEGLDisplay, cfg, LOCAL_EGL_##_x, &attrval);  \
            if ((err = fGetError()) != 0x3000) {                        \
                printf_stderr("  %s: ERROR (0x%04x)\n", #_x, err);        \
            } else {                                                    \
                printf_stderr("  %s: %d (0x%04x)\n", #_x, attrval, attrval); \
            }                                                           \
        } while(0)

        printf_stderr("EGL Config: %d [%p]\n", (int)(intptr_t)cfg, cfg);

        ATTR(BUFFER_SIZE);
        ATTR(ALPHA_SIZE);
        ATTR(BLUE_SIZE);
        ATTR(GREEN_SIZE);
        ATTR(RED_SIZE);
        ATTR(DEPTH_SIZE);
        ATTR(STENCIL_SIZE);
        ATTR(CONFIG_CAVEAT);
        ATTR(CONFIG_ID);
        ATTR(LEVEL);
        ATTR(MAX_PBUFFER_HEIGHT);
        ATTR(MAX_PBUFFER_PIXELS);
        ATTR(MAX_PBUFFER_WIDTH);
        ATTR(NATIVE_RENDERABLE);
        ATTR(NATIVE_VISUAL_ID);
        ATTR(NATIVE_VISUAL_TYPE);
        ATTR(PRESERVED_RESOURCES);
        ATTR(SAMPLES);
        ATTR(SAMPLE_BUFFERS);
        ATTR(SURFACE_TYPE);
        ATTR(TRANSPARENT_TYPE);
        ATTR(TRANSPARENT_RED_VALUE);
        ATTR(TRANSPARENT_GREEN_VALUE);
        ATTR(TRANSPARENT_BLUE_VALUE);
        ATTR(BIND_TO_TEXTURE_RGB);
        ATTR(BIND_TO_TEXTURE_RGBA);
        ATTR(MIN_SWAP_INTERVAL);
        ATTR(MAX_SWAP_INTERVAL);
        ATTR(LUMINANCE_SIZE);
        ATTR(ALPHA_MASK_SIZE);
        ATTR(COLOR_BUFFER_TYPE);
        ATTR(RENDERABLE_TYPE);
        ATTR(CONFORMANT);

#undef ATTR
    }

    void DumpEGLConfigs() {
        int nc = 0;
        fGetConfigs(mEGLDisplay, NULL, 0, &nc);
        EGLConfig *ec = new EGLConfig[nc];
        fGetConfigs(mEGLDisplay, ec, nc, &nc);

        for (int i = 0; i < nc; ++i) {
            printf_stderr ("========= EGL Config %d ========\n");
            DumpEGLConfig(ec[i]);
        }

        delete [] ec;
    }

private:
    PRBool mInitialized;
    PRLibrary *mEGLLibrary;
    EGLDisplay mEGLDisplay;

    PRPackedBool mIsANGLE;

    PRPackedBool mHave_EGL_KHR_image_base;
    PRPackedBool mHave_EGL_KHR_image_pixmap;
    PRPackedBool mHave_EGL_KHR_gl_texture_2D_image;
    PRPackedBool mHave_EGL_KHR_lock_surface;
    PRPackedBool mHave_EGL_ANGLE_surface_d3d_share_handle;
} sEGLLibrary;

class GLContextEGL : public GLContext
{
    friend class TextureImageEGL;

public:
    GLContextEGL(const ContextFormat& aFormat,
                 GLContext *aShareContext,
                 EGLConfig aConfig,
                 EGLSurface aSurface,
                 EGLContext aContext,
                 PRBool aIsOffscreen = PR_FALSE)
        : GLContext(aFormat, aIsOffscreen, aShareContext)
        , mConfig(aConfig) 
        , mSurface(aSurface), mContext(aContext)
        , mGLWidget(nsnull)
        , mThebesSurface(nsnull)
        , mBound(PR_FALSE)
        , mIsPBuffer(PR_FALSE)
        , mIsDoubleBuffered(PR_FALSE)
        , mPBufferCanBindToTexture(PR_FALSE)
    {
        // any EGL contexts will always be GLESv2
        SetIsGLES2(PR_TRUE);

#ifdef DEBUG
        printf_stderr("Initializing context %p surface %p on display %p\n", mContext, mSurface, EGL_DISPLAY());
#endif
    }

    ~GLContextEGL()
    {
        MarkDestroyed();

        // If mGLWidget is non-null, then we've been given it by the GL context provider,
        // and it's managed by the widget implementation. In this case, We can't destroy
        // our contexts.
        if (mGLWidget)
            return;

#ifdef DEBUG
        printf_stderr("Destroying context %p surface %p on display %p\n", mContext, mSurface, EGL_DISPLAY());
#endif

        sEGLLibrary.fDestroyContext(EGL_DISPLAY(), mContext);
        sEGLLibrary.fDestroySurface(EGL_DISPLAY(), mSurface);
    }

    GLContextType GetContextType() {
        return ContextTypeEGL;
    }

    PRBool Init()
    {
        if (!OpenLibrary(GLES2_LIB)) {
            NS_WARNING("Couldn't load EGL LIB.");
            return PR_FALSE;
        }

        MakeCurrent();
        PRBool ok = InitWithPrefix("gl", PR_TRUE);
#if 0
        if (ok) {
            EGLint v;
            sEGLLibrary.fQueryContext(EGL_DISPLAY(), mContext, LOCAL_EGL_RENDER_BUFFER, &v);
            if (v == LOCAL_EGL_BACK_BUFFER)
                mIsDoubleBuffered = PR_TRUE;
        }
#endif
        return ok;
    }

    PRBool IsDoubleBuffered() {
        return mIsDoubleBuffered;
    }

    void SetIsDoubleBuffered(PRBool aIsDB) {
        mIsDoubleBuffered = aIsDB;
    }

    PRBool BindTexImage()
    {
        if (!mSurface)
            return PR_FALSE;

        if (mBound && !ReleaseTexImage())
            return PR_FALSE;

        EGLBoolean success = sEGLLibrary.fBindTexImage(EGL_DISPLAY(),
            (EGLSurface)mSurface, LOCAL_EGL_BACK_BUFFER);
        if (success == LOCAL_EGL_FALSE)
            return PR_FALSE;

        mBound = PR_TRUE;
        return PR_TRUE;
    }

    PRBool ReleaseTexImage()
    {
        if (!mBound)
            return PR_TRUE;

        if (!mSurface)
            return PR_FALSE;

        EGLBoolean success;
        success = sEGLLibrary.fReleaseTexImage(EGL_DISPLAY(),
                                               (EGLSurface)mSurface,
                                               LOCAL_EGL_BACK_BUFFER);
        if (success == LOCAL_EGL_FALSE)
            return PR_FALSE;

        mBound = PR_FALSE;
        return PR_TRUE;
    }

    PRBool MakeCurrentImpl(PRBool aForce = PR_FALSE) {
        PRBool succeeded = PR_TRUE;

        // Assume that EGL has the same problem as WGL does,
        // where MakeCurrent with an already-current context is
        // still expensive.
        if (aForce || sEGLLibrary.fGetCurrentContext() != mContext) {
            if (mGLWidget) {
#ifdef MOZ_WIDGET_QT
                static_cast<QGLWidget*>(mGLWidget)->makeCurrent();
#else
                succeeded = PR_FALSE;
#endif
            } else {
                succeeded = sEGLLibrary.fMakeCurrent(EGL_DISPLAY(),
                                                     mSurface, mSurface,
                                                     mContext);
            }
            NS_ASSERTION(succeeded, "Failed to make GL context current!");
        }

        return succeeded;
    }

#ifdef MOZ_WIDGET_QT
    virtual PRBool
    RenewSurface() {
        /* We don't support renewing on QT because we don't create the surface ourselves */
        return PR_FALSE;
    }
#else
    virtual PRBool
    RenewSurface() {
        sEGLLibrary.fDestroySurface(EGL_DISPLAY(), mSurface);

        EGLConfig config = CreateConfig();
        mSurface = CreateSurfaceForWindow(NULL, config);

        return sEGLLibrary.fMakeCurrent(EGL_DISPLAY(),
                                        mSurface, mSurface,
                                        mContext);
    }
#endif

    PRBool SetupLookupFunction()
    {
        mLookupFunc = (PlatformLookupFunction)sEGLLibrary.fGetProcAddress;
        return PR_TRUE;
    }

    void *GetNativeData(NativeDataType aType)
    {
        switch (aType) {
        case NativeGLContext:
            return mContext;

        default:
            return nsnull;
        }
    }

    PRBool SwapBuffers()
    {
        return sEGLLibrary.fSwapBuffers(EGL_DISPLAY(), mSurface);
    }

    virtual already_AddRefed<TextureImage>
    CreateTextureImage(const nsIntSize& aSize,
                       TextureImage::ContentType aContentType,
                       GLenum aWrapMode,
                       PRBool aUseNearestFilter=PR_FALSE);

    // hold a reference to the given surface
    // for the lifetime of this context.
    void HoldSurface(gfxASurface *aSurf) {
        mThebesSurface = aSurf;
    }

    void SetQtGLWidget(void *widget) {
        mGLWidget = widget;
    }

    EGLContext Context() {
        return mContext;
    }

    PRBool BindTex2DOffscreen(GLContext *aOffscreen);
    void UnbindTex2DOffscreen(GLContext *aOffscreen);
    PRBool ResizeOffscreen(const gfxIntSize& aNewSize);
    void BindOffscreenFramebuffer();

    static already_AddRefed<GLContextEGL>
    CreateEGLPixmapOffscreenContext(const gfxIntSize& aSize,
                                    const ContextFormat& aFormat);

    static already_AddRefed<GLContextEGL>
    CreateEGLPBufferOffscreenContext(const gfxIntSize& aSize,
                                     const ContextFormat& aFormat);

    void SetOffscreenSize(const gfxIntSize &aRequestedSize,
                          const gfxIntSize &aActualSize)
    {
        mOffscreenSize = aRequestedSize;
        mOffscreenActualSize = aActualSize;
    }

    void *GetD3DShareHandle() {
        if (!sEGLLibrary.HasANGLESurfaceD3DShareHandle()) {
            return nsnull;
        }

        void *h = nsnull;

#ifndef EGL_D3D_TEXTURE_2D_SHARE_HANDLE_ANGLE
#define EGL_D3D_TEXTURE_2D_SHARE_HANDLE_ANGLE 0x3200
#endif

        if (!sEGLLibrary.fQuerySurfacePointerANGLE(EGL_DISPLAY(), mSurface,
                                                   EGL_D3D_TEXTURE_2D_SHARE_HANDLE_ANGLE, (void**) &h))
        {
            return nsnull;
        }

        return h;
    }

protected:
    friend class GLContextProviderEGL;

    EGLConfig  mConfig;
    EGLSurface mSurface;
    EGLContext mContext;
    void *mGLWidget;
    nsRefPtr<gfxASurface> mThebesSurface;
    PRBool mBound;

    PRPackedBool mIsPBuffer;
    PRPackedBool mIsDoubleBuffered;
    PRPackedBool mPBufferCanBindToTexture;

    static EGLSurface CreatePBufferSurfaceTryingPowerOfTwo(EGLConfig config,
                                                           EGLenum bindToTextureFormat,
                                                           gfxIntSize& pbsize)
    {
        nsTArray<EGLint> pbattrs(16);
        EGLSurface surface = nsnull;

    TRY_AGAIN_POWER_OF_TWO:
        pbattrs.Clear();
        pbattrs.AppendElement(LOCAL_EGL_WIDTH); pbattrs.AppendElement(pbsize.width);
        pbattrs.AppendElement(LOCAL_EGL_HEIGHT); pbattrs.AppendElement(pbsize.height);

        if (bindToTextureFormat != LOCAL_EGL_NONE) {
            pbattrs.AppendElement(LOCAL_EGL_TEXTURE_TARGET);
            pbattrs.AppendElement(LOCAL_EGL_TEXTURE_2D);

            pbattrs.AppendElement(LOCAL_EGL_TEXTURE_FORMAT);
            pbattrs.AppendElement(bindToTextureFormat);
        }

        pbattrs.AppendElement(LOCAL_EGL_NONE);

        surface = sEGLLibrary.fCreatePbufferSurface(EGL_DISPLAY(), config, &pbattrs[0]);
        if (!surface) {
            if (!is_power_of_two(pbsize.width) ||
                !is_power_of_two(pbsize.height))
            {
                if (!is_power_of_two(pbsize.width))
                    pbsize.width = next_power_of_two(pbsize.width);
                if (!is_power_of_two(pbsize.height))
                    pbsize.height = next_power_of_two(pbsize.height);

                NS_WARNING("Failed to create pbuffer, trying power of two dims");
                goto TRY_AGAIN_POWER_OF_TWO;
            }

            NS_WARNING("Failed to create pbuffer surface");
            return nsnull;
        }

        return surface;
    }
};

PRBool
GLContextEGL::BindTex2DOffscreen(GLContext *aOffscreen)
{
    if (aOffscreen->GetContextType() != ContextTypeEGL) {
        NS_WARNING("non-EGL context");
        return PR_FALSE;
    }

    GLContextEGL *offs = static_cast<GLContextEGL*>(aOffscreen);

    if (offs->mIsPBuffer && offs->mPBufferCanBindToTexture) {
        PRBool ok = sEGLLibrary.fBindTexImage(EGL_DISPLAY(),
                                              offs->mSurface,
                                              LOCAL_EGL_BACK_BUFFER);
        return ok;
    }

    if (offs->mOffscreenTexture) {
        if (offs->GetSharedContext() != GLContextProviderEGL::GetGlobalContext())
        {
            NS_WARNING("offscreen FBO context can only be bound with context sharing!");
            return PR_FALSE;
        }

        fBindTexture(LOCAL_GL_TEXTURE_2D, offs->mOffscreenTexture);
        return PR_TRUE;
    }

    NS_WARNING("don't know how to bind this!");

    return PR_FALSE;
}

void
GLContextEGL::UnbindTex2DOffscreen(GLContext *aOffscreen)
{
    NS_ASSERTION(aOffscreen->GetContextType() == ContextTypeEGL, "wrong type");

    GLContextEGL *offs = static_cast<GLContextEGL*>(aOffscreen);

    if (offs->mIsPBuffer && offs->mPBufferCanBindToTexture) {
        sEGLLibrary.fReleaseTexImage(EGL_DISPLAY(),
                                     offs->mSurface,
                                     LOCAL_EGL_BACK_BUFFER);
    }
}

PRBool
GLContextEGL::ResizeOffscreen(const gfxIntSize& aNewSize)
{
    if (mIsPBuffer) {
        gfxIntSize pbsize(aNewSize);

        EGLSurface surface =
            CreatePBufferSurfaceTryingPowerOfTwo(mConfig,
                                                 mPBufferCanBindToTexture
                                                 ? (mCreationFormat.minAlpha
                                                    ? LOCAL_EGL_TEXTURE_RGBA
                                                    : LOCAL_EGL_TEXTURE_RGB)
                                                 : LOCAL_EGL_NONE,
                                                 pbsize);
        if (!surface) {
            NS_WARNING("Failed to resize pbuffer");
            return nsnull;
        }

        SetOffscreenSize(aNewSize, pbsize);

        sEGLLibrary.fDestroySurface(EGL_DISPLAY(), mSurface);

        mSurface = surface;

        MakeCurrent(PR_TRUE);
        ClearSafely();

        return PR_TRUE;
    }

    return ResizeOffscreenFBO(aNewSize);
}


static GLContextEGL *
GetGlobalContextEGL()
{
    return static_cast<GLContextEGL*>(GLContextProviderEGL::GetGlobalContext());
}

static GLenum
GLFormatForImage(gfxASurface::gfxImageFormat aFormat)
{
    switch (aFormat) {
    case gfxASurface::ImageFormatARGB32:
        return LOCAL_GL_RGBA;
    case gfxASurface::ImageFormatRGB24:
        // this often isn't correct, because we can't guarantee that
        // the alpha byte will be 0xff coming from the image surface
        NS_WARNING("Using GL_RGBA for ImageFormatRGB24, are you sure you know what you're doing?");
        return LOCAL_GL_RGBA;
    case gfxASurface::ImageFormatRGB16_565:
        return LOCAL_GL_RGB;
    default:
        NS_WARNING("Unknown GL format for Image format");
    }
    return 0;
}

static GLenum
GLTypeForImage(gfxASurface::gfxImageFormat aFormat)
{
    switch (aFormat) {
    case gfxASurface::ImageFormatARGB32:
    case gfxASurface::ImageFormatRGB24:
        return LOCAL_GL_UNSIGNED_BYTE;
    case gfxASurface::ImageFormatRGB16_565:
        return LOCAL_GL_UNSIGNED_SHORT_5_6_5;
    default:
        NS_WARNING("Unknown GL format for Image format");
    }
    return 0;
}

class TextureImageEGL
    : public TextureImage
{
public:
    TextureImageEGL(GLuint aTexture,
                    const nsIntSize& aSize,
                    GLenum aWrapMode,
                    ContentType aContentType,
                    GLContext* aContext)
        : TextureImage(aTexture, aSize, aWrapMode, aContentType)
        , mGLContext(aContext)
        , mUpdateFormat(gfxASurface::ImageFormatUnknown)
        , mSurface(nsnull)
        , mConfig(nsnull)
        , mImageKHR(nsnull)
        , mCreated(PR_FALSE)
        , mBound(PR_FALSE)
        , mIsLocked(PR_FALSE)
    {
        mUpdateFormat = gfxASurface::FormatFromContent(GetContentType());

        if (gUseBackingSurface) {
            if (mUpdateFormat == gfxASurface::ImageFormatRGB24) {
#ifdef MOZ_GFX_OPTIMIZE_MOBILE
                mUpdateFormat = gfxASurface::ImageFormatRGB16_565;
                mShaderType = RGBXLayerProgramType;
#else
                mUpdateFormat = gfxASurface::ImageFormatARGB32;
                mShaderType = RGBALayerProgramType;
#endif
            } else {
                mShaderType = RGBALayerProgramType;
            }
            CreateBackingSurface(gfxIntSize(aSize.width, aSize.height));
        } else {
            // Convert RGB24 to either ARGB32 on mobile.  We can't
            // generate GL_RGB data, so we'll always have an alpha byte
            // for RGB24.  No easy way to upload that to GL.
            // 
            // Note that if we start using RGB565 here, we'll need to
            // watch for a) setting mIsRGBFormat to TRUE; and b) getting
            // the stride right.
            if (mUpdateFormat == gfxASurface::ImageFormatRGB24) {
                mUpdateFormat = gfxASurface::ImageFormatARGB32;
            }
            // We currently always use BGRA type textures
            mShaderType = BGRALayerProgramType;
        }
    }

    virtual ~TextureImageEGL()
    {
        GLContext *ctx = mGLContext;
        if (ctx->IsDestroyed() || !NS_IsMainThread()) {
            ctx = ctx->GetSharedContext();
        }

        // If we have a context, then we need to delete the texture;
        // if we don't have a context (either real or shared),
        // then they went away when the contex was deleted, because it
        // was the only one that had access to it.
        if (ctx && !ctx->IsDestroyed()) {
            ctx->MakeCurrent();
            ctx->fDeleteTextures(1, &mTexture);
            ReleaseTexImage();
            DestroyEGLSurface();
        }
    }

    virtual gfxASurface* BeginUpdate(nsIntRegion& aRegion)
    {
        NS_ASSERTION(!mUpdateSurface, "BeginUpdate() without EndUpdate()?");

        // determine the region the client will need to repaint
        if (!mCreated) {
            // if the texture hasn't been initialized yet, force the
            // client to paint everything
            mUpdateRect = nsIntRect(nsIntPoint(0, 0), mSize);
            //printf_stderr("v Forcing full paint\n");
            aRegion = nsIntRegion(mUpdateRect);
        } else {
            mUpdateRect = aRegion.GetBounds();
            if (!mBackingSurface) {
                // We can only draw a rectangle, not subregions due to
                // the way that our texture upload functions work.  If
                // needed, we /could/ do multiple texture uploads if we have
                // non-overlapping rects, but that's a tradeoff.
                aRegion = nsIntRegion(mUpdateRect);
            }
        }

        //printf_stderr("BeginUpdate with updateRect [%d %d %d %d]\n", mUpdateRect.x, mUpdateRect.y, mUpdateRect.width, mUpdateRect.height);
        if (!nsIntRect(nsIntPoint(0, 0), mSize).Contains(mUpdateRect)) {
            NS_ERROR("update outside of image");
            return NULL;
        }

        if (mBackingSurface) {
            if (sEGLLibrary.HasKHRLockSurface()) {
                mUpdateSurface = GetLockSurface();
            } else {
                mUpdateSurface = mBackingSurface;
            }

            return mUpdateSurface;
        }

        // if we get this far, then we're using Cairo's byte order
        mIsRGBFormat = PR_FALSE;

        //printf_stderr("creating image surface %dx%d format %d\n", mUpdateRect.width, mUpdateRect.height, mUpdateFormat);

        mUpdateSurface =
            new gfxImageSurface(gfxIntSize(mUpdateRect.width, mUpdateRect.height),
                                mUpdateFormat);

        mUpdateSurface->SetDeviceOffset(gfxPoint(-mUpdateRect.x, -mUpdateRect.y));

        return mUpdateSurface;
    }

    virtual void EndUpdate()
    {
        NS_ASSERTION(!!mUpdateSurface, "EndUpdate() without BeginUpdate()?");

        if (mIsLocked) {
            UnlockSurface();
            mCreated = PR_TRUE;
            mUpdateSurface = nsnull;
            return;
        }

        if (mBackingSurface && mUpdateSurface == mBackingSurface) {
#ifdef MOZ_X11
            if (mBackingSurface->GetType() == gfxASurface::SurfaceTypeXlib) {
                XSync(DefaultXDisplay(), False);
            }
#endif

            mBackingSurface->SetDeviceOffset(gfxPoint(0, 0));
            mCreated = PR_TRUE;
            mUpdateSurface = nsnull;
            return;
        }

        //printf_stderr("EndUpdate: slow path");

        // This is the slower path -- we didn't have any way to set up
        // a fast mapping between our cairo target surface and the GL
        // texture, so we have to upload data.

        // Undo the device offset that BeginUpdate set; doesn't much
        // matter for us here, but important if we ever do anything
        // directly with the surface.
        mUpdateSurface->SetDeviceOffset(gfxPoint(0, 0));

        nsRefPtr<gfxImageSurface> uploadImage = nsnull;
        gfxIntSize updateSize(mUpdateRect.width, mUpdateRect.height);

        NS_ASSERTION(mUpdateSurface->GetType() == gfxASurface::SurfaceTypeImage &&
                     mUpdateSurface->GetSize() == updateSize,
                     "Upload image isn't an image surface when one is expected, or is wrong size!");

        uploadImage = static_cast<gfxImageSurface*>(mUpdateSurface.get());

        if (!uploadImage) {
            return;
        }

        mGLContext->MakeCurrent();
        mGLContext->fBindTexture(LOCAL_GL_TEXTURE_2D, mTexture);

        if (!mCreated) {
            NS_ASSERTION(mUpdateRect.x == 0 && mUpdateRect.y == 0 &&
                         mUpdateRect.Size() == mSize,
                         "Bad initial update on non-created texture!");

            mGLContext->fTexImage2D(LOCAL_GL_TEXTURE_2D,
                                    0,
                                    GLFormatForImage(mUpdateFormat),
                                    mUpdateRect.width,
                                    mUpdateRect.height,
                                    0,
                                    GLFormatForImage(uploadImage->Format()),
                                    GLTypeForImage(uploadImage->Format()),
                                    uploadImage->Data());
            mCreated = PR_TRUE;
        } else {
            mGLContext->fTexSubImage2D(LOCAL_GL_TEXTURE_2D,
                                       0,
                                       mUpdateRect.x,
                                       mUpdateRect.y,
                                       mUpdateRect.width,
                                       mUpdateRect.height,
                                       GLFormatForImage(uploadImage->Format()),
                                       GLTypeForImage(uploadImage->Format()),
                                       uploadImage->Data());
        }

        mUpdateSurface = nsnull;
        return;         // mTexture is bound
    }

    virtual bool DirectUpdate(gfxASurface *aSurf, const nsIntRegion& aRegion)
    {
        nsIntRect bounds = aRegion.GetBounds();
  
        nsIntRegion region;
        if (!mCreated) {
            bounds = nsIntRect(0, 0, mSize.width, mSize.height);
            region = nsIntRegion(bounds);
        } else {
            region = aRegion;
        }

        if (mBackingSurface && sEGLLibrary.HasKHRLockSurface()) {
            mUpdateSurface = GetLockSurface();
            if (mUpdateSurface) {
                nsRefPtr<gfxContext> ctx = new gfxContext(mUpdateSurface);
                gfxUtils::ClipToRegion(ctx, aRegion);
                ctx->SetSource(aSurf);
                ctx->SetOperator(gfxContext::OPERATOR_SOURCE);
                ctx->Paint();
                mUpdateSurface = nsnull;
                UnlockSurface();
            }
        } else {
            mShaderType =
              mGLContext->UploadSurfaceToTexture(aSurf,
                                                 region,
                                                 mTexture,
                                                 !mCreated,
                                                 bounds.TopLeft(),
                                                 PR_FALSE);
        }

        mCreated = PR_TRUE;
        return true;
    }

    virtual PRBool InUpdate() const { return !!mUpdateSurface; }

    virtual void Resize(const nsIntSize& aSize)
    {
        NS_ASSERTION(!mUpdateSurface, "Resize() while in update?");

        if (mSize == aSize && mCreated)
            return;

        mGLContext->fBindTexture(LOCAL_GL_TEXTURE_2D, mTexture);
        if (mBackingSurface) {
            CreateBackingSurface(gfxIntSize(aSize.width, aSize.height));
        } else {
            mGLContext->fTexImage2D(LOCAL_GL_TEXTURE_2D,
                                    0,
                                    GLFormatForImage(mUpdateFormat),
                                    aSize.width,
                                    aSize.height,
                                    0,
                                    GLFormatForImage(mUpdateFormat),
                                    GLTypeForImage(mUpdateFormat),
                                    NULL);
            mCreated = PR_TRUE;
        }

        mSize = aSize;
    }

    PRBool BindTexImage()
    {
        if (mBound && !ReleaseTexImage())
            return PR_FALSE;

        EGLBoolean success =
            sEGLLibrary.fBindTexImage(EGL_DISPLAY(),
                                      (EGLSurface)mSurface,
                                      LOCAL_EGL_BACK_BUFFER);

        if (success == LOCAL_EGL_FALSE)
            return PR_FALSE;

        mBound = PR_TRUE;
        return PR_TRUE;
    }

    PRBool ReleaseTexImage()
    {
        if (!mBound)
            return PR_TRUE;

        EGLBoolean success =
            sEGLLibrary.fReleaseTexImage(EGL_DISPLAY(),
                                         (EGLSurface)mSurface,
                                         LOCAL_EGL_BACK_BUFFER);

        if (success == LOCAL_EGL_FALSE)
            return PR_FALSE;

        mBound = PR_FALSE;
        return PR_TRUE;
    }

    virtual already_AddRefed<gfxImageSurface> GetLockSurface()
    {
        if (mIsLocked) {
            NS_WARNING("Can't lock surface twice");
            return nsnull;
        }

        if (!sEGLLibrary.HasKHRLockSurface()) {
            NS_WARNING("GetLockSurface called, but no EGL_KHR_lock_surface extension!");
            return nsnull;
        }

        if (!CreateEGLSurface(mBackingSurface)) {
            NS_WARNING("Failed to create EGL surface");
            return nsnull;
        }

        static EGLint lock_attribs[] = {
            LOCAL_EGL_MAP_PRESERVE_PIXELS_KHR, LOCAL_EGL_TRUE,
            LOCAL_EGL_LOCK_USAGE_HINT_KHR, LOCAL_EGL_READ_SURFACE_BIT_KHR | LOCAL_EGL_WRITE_SURFACE_BIT_KHR,
            LOCAL_EGL_NONE
        };

        sEGLLibrary.fLockSurfaceKHR(EGL_DISPLAY(), mSurface, lock_attribs);

        mIsLocked = PR_TRUE;

        unsigned char *data = nsnull;
        int pitch = 0;
        int pixsize = 0;

        sEGLLibrary.fQuerySurface(EGL_DISPLAY(), mSurface, LOCAL_EGL_BITMAP_POINTER_KHR, (EGLint*)&data);
        sEGLLibrary.fQuerySurface(EGL_DISPLAY(), mSurface, LOCAL_EGL_BITMAP_PITCH_KHR, &pitch);
        sEGLLibrary.fQuerySurface(EGL_DISPLAY(), mSurface, LOCAL_EGL_BITMAP_PIXEL_SIZE_KHR, &pixsize);

        nsRefPtr<gfxImageSurface> sharedImage =
            new gfxImageSurface(data,
                                mBackingSurface->GetSize(),
                                pitch,
                                mUpdateFormat);

        return sharedImage.forget();
    }

    virtual void UnlockSurface()
    {
        if (!mIsLocked) {
            NS_WARNING("UnlockSurface called, surface not locked!");
            return;
        }

        sEGLLibrary.fUnlockSurfaceKHR(EGL_DISPLAY(), mSurface);
        mIsLocked = PR_FALSE;
    }

    virtual already_AddRefed<gfxASurface> GetBackingSurface()
    {
        if (mBackingSurface) {
            NS_ADDREF(mBackingSurface);
        }
        return mBackingSurface.get();
    }

    virtual PRBool CreateEGLSurface(gfxASurface* aSurface)
    {
#ifdef MOZ_X11
        if (!aSurface) {
            NS_WARNING("no surface");
            return PR_FALSE;
        }

        if (aSurface->GetType() != gfxASurface::SurfaceTypeXlib) {
            NS_WARNING("wrong surface type, must be xlib");
            return PR_FALSE;
        }

        if (mSurface) {
            return PR_TRUE;
        }

        EGLSurface surface = CreateEGLSurfaceForXSurface(aSurface, &mConfig);

        if (!surface) {
            NS_WARNING("couldn't find X config for surface");
            return PR_FALSE;
        }

        mSurface = surface;
        return PR_TRUE;
#else
        return PR_FALSE;
#endif
    }

    virtual void DestroyEGLSurface(void)
    {
        if (!mSurface)
            return;

        sEGLLibrary.fDestroySurface(EGL_DISPLAY(), mSurface);
        mSurface = nsnull;
    }

    virtual PRBool CreateBackingSurface(const gfxIntSize& aSize)
    {
        ReleaseTexImage();
        DestroyEGLSurface();
        mBackingSurface = nsnull;

#ifdef MOZ_X11
        Display* dpy = DefaultXDisplay();
        XRenderPictFormat* renderFMT =
            gfxXlibSurface::FindRenderFormat(dpy, mUpdateFormat);

        nsRefPtr<gfxXlibSurface> xsurface =
            gfxXlibSurface::Create(DefaultScreenOfDisplay(dpy),
                                   renderFMT,
                                   gfxIntSize(aSize.width, aSize.height));

        XSync(dpy, False);
        mConfig = nsnull;

        if (sEGLLibrary.HasKHRImagePixmap() && sEGLLibrary.HasKHRImageTexture2D()) {
            mImageKHR =
                sEGLLibrary.fCreateImageKHR(EGL_DISPLAY(),
                                            EGL_NO_CONTEXT,
                                            LOCAL_EGL_NATIVE_PIXMAP_KHR,
                                            (EGLClientBuffer)xsurface->XDrawable(),
                                            NULL);

            if (!mImageKHR) {
                printf_stderr("couldn't create EGL image: ERROR (0x%04x)\n", sEGLLibrary.fGetError());
                return PR_FALSE;
            }
            mGLContext->fBindTexture(LOCAL_GL_TEXTURE_2D, mTexture);
            sEGLLibrary.fImageTargetTexture2DOES(LOCAL_GL_TEXTURE_2D, mImageKHR);
            sEGLLibrary.fDestroyImageKHR(EGL_DISPLAY(), mImageKHR);
            mImageKHR = NULL;
        } else {
            if (!CreateEGLSurface(xsurface)) {
                printf_stderr("ProviderEGL Failed create EGL surface: ERROR (0x%04x)\n", sEGLLibrary.fGetError());
                return PR_FALSE;
            }

            if (!BindTexImage()) {
                printf_stderr("ProviderEGL Failed to bind teximage: ERROR (0x%04x)\n", sEGLLibrary.fGetError());
                return PR_FALSE;
            }
        }

        mBackingSurface = xsurface;
        mIsRGBFormat = PR_TRUE;
#endif

        return mBackingSurface != nsnull;
    }

protected:
    typedef gfxASurface::gfxImageFormat ImageFormat;

    GLContext* mGLContext;

    nsIntRect mUpdateRect;
    ImageFormat mUpdateFormat;
    nsRefPtr<gfxASurface> mBackingSurface;
    nsRefPtr<gfxASurface> mUpdateSurface;
    EGLSurface mSurface;
    EGLConfig mConfig;
    EGLImageKHR mImageKHR;

    PRPackedBool mCreated;
    PRPackedBool mBound;
    PRPackedBool mIsLocked;
};

already_AddRefed<TextureImage>
GLContextEGL::CreateTextureImage(const nsIntSize& aSize,
                                 TextureImage::ContentType aContentType,
                                 GLenum aWrapMode,
                                 PRBool aUseNearestFilter)
{
  MakeCurrent();

  GLuint texture;
  fGenTextures(1, &texture);

  fActiveTexture(LOCAL_GL_TEXTURE0);
  fBindTexture(LOCAL_GL_TEXTURE_2D, texture);

  nsRefPtr<TextureImageEGL> teximage =
      new TextureImageEGL(texture, aSize, aWrapMode, aContentType, this);

  GLint texfilter = aUseNearestFilter ? LOCAL_GL_NEAREST : LOCAL_GL_LINEAR;
  fTexParameteri(LOCAL_GL_TEXTURE_2D, LOCAL_GL_TEXTURE_MIN_FILTER, texfilter);
  fTexParameteri(LOCAL_GL_TEXTURE_2D, LOCAL_GL_TEXTURE_MAG_FILTER, texfilter);
  fTexParameteri(LOCAL_GL_TEXTURE_2D, LOCAL_GL_TEXTURE_WRAP_S, aWrapMode);
  fTexParameteri(LOCAL_GL_TEXTURE_2D, LOCAL_GL_TEXTURE_WRAP_T, aWrapMode);

  return teximage.forget();
}

static ContextFormat
DepthToGLFormat(int aDepth)
{
    switch (aDepth) {
        case 32:
            return ContextFormat::BasicRGBA32;
        case 24:
            return ContextFormat::BasicRGB24;
        case 16:
            return ContextFormat::BasicRGB16_565;
        default:
            break;
    }
    return ContextFormat::BasicRGBA32;
}


#ifdef MOZ_WIDGET_QT
already_AddRefed<GLContext>
GLContextProviderEGL::CreateForWindow(nsIWidget *aWidget)
{
    if (!sEGLLibrary.EnsureInitialized()) {
        return nsnull;
    }

    QWidget *viewport = static_cast<QWidget*>(aWidget->GetNativeData(NS_NATIVE_SHELLWIDGET));
    if (!viewport)
        return nsnull;

    if (viewport->paintEngine()->type() == QPaintEngine::OpenGL2) {
        // Qt widget viewport already have GL context created by Qt
        // Create dummy GLContextEGL class
        nsRefPtr<GLContextEGL> glContext =
            new GLContextEGL(ContextFormat(DepthToGLFormat(viewport->depth())),
                             NULL,
                             NULL, NULL,
                             sEGLLibrary.fGetCurrentContext());
        if (!glContext->Init())
            return nsnull;

        glContext->SetIsDoubleBuffered(PR_TRUE);

        glContext->SetQtGLWidget(viewport);

        return glContext.forget();
    }

    // All Qt nsIWidget's have the same X-Window surface
    // And EGL not allowing to create multiple GL context for the same window
    // we should be able to create GL context for QGV viewport once, and reuse it for all child widgets
    NS_ERROR("Need special GLContext implementation for QT widgets structure");

    // Switch to software rendering here
    return nsnull;
}

#else

EGLConfig
CreateConfig()
{
    EGLConfig  config;
    EGLint attribs[] = {
        LOCAL_EGL_SURFACE_TYPE,    LOCAL_EGL_WINDOW_BIT,
        LOCAL_EGL_RENDERABLE_TYPE, LOCAL_EGL_OPENGL_ES2_BIT,

#ifdef MOZ_GFX_OPTIMIZE_MOBILE
        LOCAL_EGL_RED_SIZE,        5,
        LOCAL_EGL_GREEN_SIZE,      6,
        LOCAL_EGL_BLUE_SIZE,       5,
        LOCAL_EGL_ALPHA_SIZE,      0,
#else
        LOCAL_EGL_RED_SIZE,        8,
        LOCAL_EGL_GREEN_SIZE,      8,
        LOCAL_EGL_BLUE_SIZE,       8,
        LOCAL_EGL_ALPHA_SIZE,      8,
#endif

        LOCAL_EGL_NONE
    };

    EGLConfig configs[64];
    EGLint ncfg = 64;
    if (!sEGLLibrary.fChooseConfig(EGL_DISPLAY(), attribs, configs, ncfg, &ncfg) ||
        ncfg < 1)
    {
        return nsnull;
    }

    config = 0;

    for (int i = 0; i < ncfg; ++i) {
        EGLint r, g, b, a;

        sEGLLibrary.fGetConfigAttrib(EGL_DISPLAY(), configs[i], LOCAL_EGL_RED_SIZE, &r);
        sEGLLibrary.fGetConfigAttrib(EGL_DISPLAY(), configs[i], LOCAL_EGL_GREEN_SIZE, &g);
        sEGLLibrary.fGetConfigAttrib(EGL_DISPLAY(), configs[i], LOCAL_EGL_BLUE_SIZE, &b);
        sEGLLibrary.fGetConfigAttrib(EGL_DISPLAY(), configs[i], LOCAL_EGL_ALPHA_SIZE, &a);

#ifdef MOZ_GFX_OPTIMIZE_MOBILE
        if (r == 5 && g == 6 && b == 5) {
            config = configs[i];
            break;
        }
#else
        if (r == 8 && g == 8 && b == 8 && a == 8) {
            config = configs[i];
            break;
        }
#endif
    }

    return config;
}

EGLSurface
CreateSurfaceForWindow(nsIWidget *aWidget, EGLConfig config)
{
    EGLSurface surface;


#ifdef DEBUG
    sEGLLibrary.DumpEGLConfig(config);
#endif

#ifdef ANDROID
    // On Android, we have to ask Java to make the eglCreateWindowSurface
    // call for us.  See GLHelpers.java for a description of why.
    //
    // We also only have one true "window", so we just use it directly and ignore
    // what was passed in.
    printf_stderr("... requesting window surface from bridge\n");
    surface = mozilla::AndroidBridge::Bridge()->
        CallEglCreateWindowSurface(EGL_DISPLAY(), config,
                                   mozilla::AndroidBridge::Bridge()->SurfaceView());
    printf_stderr("got surface %p\n", surface);
#else
    surface = sEGLLibrary.fCreateWindowSurface(EGL_DISPLAY(), config, GET_NATIVE_WINDOW(aWidget), 0);
#endif

    return surface;
}

const char*
GetVendor()
{
    if (!sEGLLibrary.EnsureInitialized()) {
        return nsnull;
    }

    return reinterpret_cast<const char*>(sEGLLibrary.fQueryString(EGL_DISPLAY(), LOCAL_EGL_VENDOR));
}

already_AddRefed<GLContext>
GLContextProviderEGL::CreateForWindow(nsIWidget *aWidget)
{
    EGLContext context;
    EGLConfig config;

    if (!sEGLLibrary.EnsureInitialized()) {
        return nsnull;
    }

    config = CreateConfig();

    if (!config) {
        printf_stderr("Failed to create EGL config!\n");
        return nsnull;
    }

    EGLSurface surface = CreateSurfaceForWindow(aWidget, config);

    if (!surface) {
        return nsnull;
    }

    if (!sEGLLibrary.fBindAPI(LOCAL_EGL_OPENGL_ES_API)) {
        sEGLLibrary.fDestroySurface(EGL_DISPLAY(), surface);
        return nsnull;
    }

    EGLint cxattribs[] = {
        LOCAL_EGL_CONTEXT_CLIENT_VERSION, 2,
        LOCAL_EGL_NONE
    };

    GLContextEGL *shareContext = GetGlobalContextEGL();

TRY_AGAIN_NO_SHARING:
    context = sEGLLibrary.fCreateContext(EGL_DISPLAY(),
                                         config,
                                         shareContext ? shareContext->mContext : EGL_NO_CONTEXT,
                                         cxattribs);
    if (!context) {
        if (shareContext) {
            NS_WARNING("CreateForWindow -- couldn't share, trying again");
            shareContext = nsnull;
            goto TRY_AGAIN_NO_SHARING;
        }

        NS_WARNING("CreateForWindow -- no context, giving up");
        sEGLLibrary.fDestroySurface(EGL_DISPLAY(), surface);
        return nsnull;
    }

    nsRefPtr<GLContextEGL> glContext = new GLContextEGL(ContextFormat(ContextFormat::BasicRGB24),
                                                        shareContext,
                                                        config, surface, context);

    if (!glContext->Init())
        return nsnull;

#if defined(XP_WIN) || defined(ANDROID) || defined(MOZ_PLATFORM_MAEMO)
    glContext->SetIsDoubleBuffered(PR_TRUE);
#endif

    return glContext.forget();
}
#endif

static void
FillPBufferAttribs(nsTArray<EGLint>& aAttrs,
                   const ContextFormat& aFormat,
                   bool aCanBindToTexture,
                   int aColorBitsOverride,
                   int aDepthBitsOverride)
{
    aAttrs.Clear();

#define A1(_x)      do { aAttrs.AppendElement(_x); } while (0)
#define A2(_x,_y)   do { A1(_x); A1(_y); } while (0)

    A2(LOCAL_EGL_RENDERABLE_TYPE, LOCAL_EGL_OPENGL_ES2_BIT);

    if (aColorBitsOverride == -1) {
        A2(LOCAL_EGL_RED_SIZE, aFormat.red);
        A2(LOCAL_EGL_GREEN_SIZE, aFormat.green);
        A2(LOCAL_EGL_BLUE_SIZE, aFormat.blue);
    } else {
        A2(LOCAL_EGL_RED_SIZE, aColorBitsOverride);
        A2(LOCAL_EGL_GREEN_SIZE, aColorBitsOverride);
        A2(LOCAL_EGL_BLUE_SIZE, aColorBitsOverride);
    }

    A2(LOCAL_EGL_ALPHA_SIZE, aFormat.alpha);

    if (aDepthBitsOverride == -1) {
        A2(LOCAL_EGL_DEPTH_SIZE, aFormat.minDepth);
    } else {
        A2(LOCAL_EGL_DEPTH_SIZE, aDepthBitsOverride);
    }

    A2(LOCAL_EGL_STENCIL_SIZE, aFormat.minStencil);

    if (aCanBindToTexture) {
        A2(aFormat.minAlpha ? LOCAL_EGL_BIND_TO_TEXTURE_RGBA : LOCAL_EGL_BIND_TO_TEXTURE_RGB,
           LOCAL_EGL_TRUE);
    }

    A1(LOCAL_EGL_NONE);
#undef A1
#undef A2
}

already_AddRefed<GLContextEGL>
GLContextEGL::CreateEGLPBufferOffscreenContext(const gfxIntSize& aSize,
                                               const ContextFormat& aFormat)
{
    EGLConfig config;
    EGLSurface surface;
    EGLContext context;

    bool configCanBindToTexture = true;

    EGLConfig configs[64];
    int numConfigs = sizeof(configs)/sizeof(EGLConfig);
    int foundConfigs = 0;

    // if we're running under ANGLE, we can't set BIND_TO_TEXTURE --
    // it's not supported, and we have dx interop pbuffers anyway
    if (sEGLLibrary.IsANGLE())
        configCanBindToTexture = false;

    nsTArray<EGLint> attribs(32);
    int attribAttempt = 0;

TRY_ATTRIBS_AGAIN:
    switch (attribAttempt) {
    case 0:
        FillPBufferAttribs(attribs, aFormat, configCanBindToTexture, 8, 24);
        break;
    case 1:
        FillPBufferAttribs(attribs, aFormat, configCanBindToTexture, -1, 24);
        break;
    case 2:
        FillPBufferAttribs(attribs, aFormat, configCanBindToTexture, -1, -1);
        break;
    }

    if (!sEGLLibrary.fChooseConfig(EGL_DISPLAY(),
                                   &attribs[0],
                                   configs, numConfigs,
                                   &foundConfigs)
        || foundConfigs == 0)
    {
        if (attribAttempt < 3) {
            attribAttempt++;
            goto TRY_ATTRIBS_AGAIN;
        }

        if (configCanBindToTexture) {
            NS_WARNING("No pbuffer EGL configs that can bind to texture, trying without");
            configCanBindToTexture = false;
            attribAttempt = 0;
            goto TRY_ATTRIBS_AGAIN;
        }

        // no configs? no pbuffers!
        return nsnull;
    }

    // XXX do some smarter matching here, perhaps instead of the more complex
    // minimum overrides above
    config = configs[0];
#ifdef DEBUG
    sEGLLibrary.DumpEGLConfig(config);
#endif

    gfxIntSize pbsize(aSize);
    surface = GLContextEGL::CreatePBufferSurfaceTryingPowerOfTwo(config,
                                                                 configCanBindToTexture
                                                                 ? (aFormat.minAlpha
                                                                    ? LOCAL_EGL_TEXTURE_RGBA
                                                                    : LOCAL_EGL_TEXTURE_RGB)
                                                                 : LOCAL_EGL_NONE,
                                                                 pbsize);
    if (!surface)
        return nsnull;

    sEGLLibrary.fBindAPI(LOCAL_EGL_OPENGL_ES_API);

    EGLint cxattrs[] = {
        LOCAL_EGL_CONTEXT_CLIENT_VERSION, 2,
        LOCAL_EGL_NONE
    };

    context = sEGLLibrary.fCreateContext(EGL_DISPLAY(),
                                         config,
                                         EGL_NO_CONTEXT,
                                         cxattrs);
    if (!context) {
        NS_WARNING("Failed to create context");
        sEGLLibrary.fDestroySurface(EGL_DISPLAY(), surface);
        return nsnull;
    }

    nsRefPtr<GLContextEGL> glContext = new GLContextEGL(aFormat, nsnull,
                                                        config, surface, context,
                                                        PR_TRUE);

    if (!glContext->Init()) {
        return nsnull;
    }

    glContext->SetOffscreenSize(aSize, pbsize);
    glContext->mIsPBuffer = PR_TRUE;
    glContext->mPBufferCanBindToTexture = configCanBindToTexture;

    return glContext.forget();
}

#ifdef MOZ_X11
EGLSurface
CreateEGLSurfaceForXSurface(gfxASurface* aSurface, EGLConfig* aConfig)
{
    gfxXlibSurface* xsurface = static_cast<gfxXlibSurface*>(aSurface);
    PRBool opaque =
        aSurface->GetContentType() == gfxASurface::CONTENT_COLOR;

    static EGLint pixmap_config_rgb[] = {
        LOCAL_EGL_TEXTURE_TARGET,       LOCAL_EGL_TEXTURE_2D,
        LOCAL_EGL_TEXTURE_FORMAT,       LOCAL_EGL_TEXTURE_RGB,
        LOCAL_EGL_NONE
    };

    static EGLint pixmap_config_rgba[] = {
        LOCAL_EGL_TEXTURE_TARGET,       LOCAL_EGL_TEXTURE_2D,
        LOCAL_EGL_TEXTURE_FORMAT,       LOCAL_EGL_TEXTURE_RGBA,
        LOCAL_EGL_NONE
    };

    EGLSurface surface = nsnull;
    if (aConfig && *aConfig) {
        if (opaque)
            surface = sEGLLibrary.fCreatePixmapSurface(EGL_DISPLAY(), *aConfig,
                                                       xsurface->XDrawable(),
                                                       pixmap_config_rgb);
        else
            surface = sEGLLibrary.fCreatePixmapSurface(EGL_DISPLAY(), *aConfig,
                                                       xsurface->XDrawable(),
                                                       pixmap_config_rgba);

        if (surface != EGL_NO_SURFACE)
            return surface;
    }

    EGLConfig configs[32];
    int numConfigs = 32;

    static EGLint pixmap_config[] = {
        LOCAL_EGL_SURFACE_TYPE,         LOCAL_EGL_PIXMAP_BIT,
        LOCAL_EGL_RENDERABLE_TYPE,      LOCAL_EGL_OPENGL_ES2_BIT,
        LOCAL_EGL_DEPTH_SIZE,           0,
        LOCAL_EGL_BIND_TO_TEXTURE_RGB,  LOCAL_EGL_TRUE,
        LOCAL_EGL_NONE
    };

    static EGLint pixmap_lock_config[] = {
        LOCAL_EGL_SURFACE_TYPE,         LOCAL_EGL_PIXMAP_BIT | LOCAL_EGL_LOCK_SURFACE_BIT_KHR,
        LOCAL_EGL_RENDERABLE_TYPE,      LOCAL_EGL_OPENGL_ES2_BIT,
        LOCAL_EGL_DEPTH_SIZE,           0,
        LOCAL_EGL_BIND_TO_TEXTURE_RGB,  LOCAL_EGL_TRUE,
        LOCAL_EGL_NONE
    };

    if (!sEGLLibrary.fChooseConfig(EGL_DISPLAY(),
                                   sEGLLibrary.HasKHRLockSurface() ?
                                       pixmap_lock_config : pixmap_config,
                                   configs, numConfigs, &numConfigs))
        return nsnull;

    if (numConfigs == 0)
        return nsnull;

    int i = 0;
    for (i = 0; i < numConfigs; ++i) {
        if (opaque)
            surface = sEGLLibrary.fCreatePixmapSurface(EGL_DISPLAY(), configs[i],
                                                       xsurface->XDrawable(),
                                                       pixmap_config_rgb);
        else
            surface = sEGLLibrary.fCreatePixmapSurface(EGL_DISPLAY(), configs[i],
                                                       xsurface->XDrawable(),
                                                       pixmap_config_rgba);

        if (surface != EGL_NO_SURFACE)
            break;
    }

    if (!surface) {
        return nsnull;
    }

    if (aConfig)
        *aConfig = configs[i];

    return surface;
}
#endif

already_AddRefed<GLContextEGL>
GLContextEGL::CreateEGLPixmapOffscreenContext(const gfxIntSize& aSize,
                                              const ContextFormat& aFormat)
{
    // XXX -- write me.
    // This needs to find a FBConfig/Visual that matches aFormat, and allocate
    // a gfxXlibSurface of the appropriat format, and then create a context
    // for it.
    //
    // The code below is almost correct, except it doesn't do the format-FBConfig
    // matching, instead just creating a random gfxXlibSurface.  The code below just
    // uses context sharing and a FBO target, when instead it should avoid context
    // sharing if some form of texture-from-pixmap functionality is available.

    gfxASurface *thebesSurface = nsnull;
    EGLNativePixmapType pixmap = 0;

#ifdef MOZ_X11
    nsRefPtr<gfxXlibSurface> xsurface =
        gfxXlibSurface::Create(DefaultScreenOfDisplay(DefaultXDisplay()),
                               gfxXlibSurface::FindRenderFormat(DefaultXDisplay(),
                                                                gfxASurface::ImageFormatRGB24),
                               gfxIntSize(16, 16));

    // XSync required after gfxXlibSurface::Create, otherwise EGL will fail with BadDrawable error
    XSync(DefaultXDisplay(), False);
    if (xsurface->CairoStatus() != 0)
        return nsnull;

    thebesSurface = xsurface;
    pixmap = xsurface->XDrawable();
#endif

    if (!pixmap) {
        return nsnull;
    }

    EGLSurface surface = 0;
    EGLConfig config = 0;

#ifdef MOZ_X11
    surface = CreateEGLSurfaceForXSurface(thebesSurface, &config);
#endif
    if (!config) {
        return nsnull;
    }

    EGLint cxattribs[] = {
        LOCAL_EGL_CONTEXT_CLIENT_VERSION, 2,
        LOCAL_EGL_NONE
    };

    GLContextEGL *shareContext = GetGlobalContextEGL();
    if (!shareContext) {
        // we depend on context sharing currently
        sEGLLibrary.fDestroySurface(EGL_DISPLAY(), surface);
        return nsnull;
    }

    EGLContext context = sEGLLibrary.fCreateContext(EGL_DISPLAY(),
                                                    config,
                                                    shareContext->Context(),
                                                    cxattribs);
    if (!context) {
        sEGLLibrary.fDestroySurface(EGL_DISPLAY(), surface);
        return nsnull;
    }

    nsRefPtr<GLContextEGL> glContext = new GLContextEGL(aFormat, shareContext,
                                                        config, surface, context,
                                                        PR_TRUE);

    if (!glContext->Init() ||
        !glContext->ResizeOffscreenFBO(aSize))
        return nsnull;

    glContext->HoldSurface(thebesSurface);

    return glContext.forget();
}

// Under EGL, if we're under X11, then we have to create a Pixmap
// because Maemo's EGL implementation doesn't support pbuffers at all
// for some reason.  On Android, pbuffers are supported fine, though
// often without the ability to texture from them directly.
already_AddRefed<GLContext>
GLContextProviderEGL::CreateOffscreen(const gfxIntSize& aSize,
                                      const ContextFormat& aFormat)
{
    if (!sEGLLibrary.EnsureInitialized()) {
        return nsnull;
    }

#if defined(ANDROID) || defined(XP_WIN)
    return GLContextEGL::CreateEGLPBufferOffscreenContext(aSize, aFormat);
#elif defined(MOZ_X11)
    return GLContextEGL::CreateEGLPixmapOffscreenContext(aSize, aFormat);
#else
    return nsnull;
#endif
}

static ContextFormat
ContentTypeToGLFormat(gfxASurface::gfxContentType aCType)
{
    switch (aCType) {
        case gfxASurface::CONTENT_COLOR_ALPHA:
            return ContextFormat::BasicRGBA32;
        case gfxASurface::CONTENT_COLOR:
#ifdef MOZ_GFX_OPTIMIZE_MOBILE
            return ContextFormat::BasicRGB16_565;
#else
            return ContextFormat::BasicRGB24;
#endif
        default:
            break;
    }
    return ContextFormat::BasicRGBA32;
}

already_AddRefed<GLContext>
GLContextProviderEGL::CreateForNativePixmapSurface(gfxASurface* aSurface)
{
    EGLSurface surface = nsnull;
    EGLContext context = nsnull;
    EGLConfig config = nsnull;

    if (!sEGLLibrary.EnsureInitialized())
        return nsnull;

#ifdef MOZ_X11
    if (aSurface->GetType() != gfxASurface::SurfaceTypeXlib) {
        // Not implemented
        return nsnull;
    }

    surface = CreateEGLSurfaceForXSurface(aSurface, &config);
    if (!config) {
        return nsnull;
    }

    EGLint cxattribs[] = {
        LOCAL_EGL_CONTEXT_CLIENT_VERSION, 2,
        LOCAL_EGL_NONE
    };

    context = sEGLLibrary.fCreateContext(EGL_DISPLAY(),
                                         config,
                                         EGL_NO_SURFACE,
                                         cxattribs);
    if (!context) {
        sEGLLibrary.fDestroySurface(EGL_DISPLAY(), surface);
        return nsnull;
    }

    nsRefPtr<GLContextEGL> glContext =
        new GLContextEGL(ContextFormat(ContentTypeToGLFormat(aSurface->GetContentType())),
                         nsnull, config, surface, context, PR_FALSE);
    glContext->HoldSurface(aSurface);

    return glContext.forget().get();
#else
    (void)surface;
    (void)context;

    // Not implemented
    return nsnull;
#endif
}

static nsRefPtr<GLContext> gGlobalContext;

GLContext *
GLContextProviderEGL::GetGlobalContext()
{
    static bool triedToCreateContext = false;
    if (!triedToCreateContext && !gGlobalContext) {
        triedToCreateContext = true;
        gGlobalContext = CreateOffscreen(gfxIntSize(16, 16));
        if (gGlobalContext)
            gGlobalContext->SetIsGlobalSharedContext(PR_TRUE);
    }

    return gGlobalContext;
}

void
GLContextProviderEGL::Shutdown()
{
    gGlobalContext = nsnull;
}

} /* namespace gl */
} /* namespace mozilla */