src/mesa/drivers/x11/glxapi.c

   1 /* $Id: glxapi.c,v 1.24 2001/05/25 21:51:02 brianp Exp $ */
   2
   3 /*
   4  * Mesa 3-D graphics library
   5  * Version:  3.5
   6  *
   7  * Copyright (C) 1999-2001  Brian Paul   All Rights Reserved.
   8  *
   9  * Permission is hereby granted, free of charge, to any person obtaining a
  10  * copy of this software and associated documentation files (the "Software"),
  11  * to deal in the Software without restriction, including without limitation
  12  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  13  * and/or sell copies of the Software, and to permit persons to whom the
  14  * Software is furnished to do so, subject to the following conditions:
  15  *
  16  * The above copyright notice and this permission notice shall be included
  17  * in all copies or substantial portions of the Software.
  18  *
  19  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  20  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  21  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  22  * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
  23  * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  24  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  */
  26
  27
  28 /*
  29  * This is the GLX API dispatcher.  Calls to the glX* functions are
  30  * either routed to the real GLX encoders or to Mesa's pseudo-GLX functions.
  31  */
  32
  33
  34 #include <assert.h>
  35 #include <stdlib.h>
  36 #include <stdio.h>
  37 #include <string.h>
  38 /*#include <dlfcn.h>*/ /* XXX not portable? */
  39 #include "glapi.h"
  40 #include "glxapi.h"
  41
  42
  43 extern struct _glxapi_table *_real_GetGLXDispatchTable(void);
  44 extern struct _glxapi_table *_mesa_GetGLXDispatchTable(void);
  45
  46
  47 struct display_dispatch {
  48    Display *Dpy;
  49    struct _glxapi_table *Table;
  50    struct display_dispatch *Next;
  51 };
  52
  53 static struct display_dispatch *DispatchList = NULL;
  54
  55
  56 /* Display -> Dispatch caching */
  57 static Display *prevDisplay = NULL;
  58 static struct _glxapi_table *prevTable = NULL;
  59
  60
  61 static struct _glxapi_table *
  62 get_dispatch(Display *dpy)
  63 {
  64    if (!dpy)
  65       return NULL;
  66
  67    /* search list of display/dispatch pairs for this display */
  68    {
  69       const struct display_dispatch *d = DispatchList;
  70       while (d) {
  71          if (d->Dpy == dpy) {
  72             prevDisplay = dpy;
  73             prevTable = d->Table;
  74             return d->Table;  /* done! */
  75          }
  76          d = d->Next;
  77       }
  78    }
  79
  80    /* A new display, determine if we should use real GLX
  81     * or Mesa's pseudo-GLX.
  82     */
  83    {
  84       struct _glxapi_table *t = NULL;
  85
  86 #ifdef GLX_BUILD_IN_XLIB_MESA
  87       if (!getenv("LIBGL_FORCE_XMESA")) {
  88          int ignore;
  89          if (XQueryExtension( dpy, "GLX", &ignore, &ignore, &ignore )) {
  90             /* the X server has the GLX extension */
  91             t = _real_GetGLXDispatchTable();
  92          }
  93       }
  94 #endif
  95
  96       if (!t) {
  97          /* Fallback to Mesa with Xlib driver */
  98 #ifdef GLX_BUILD_IN_XLIB_MESA
  99          if (getenv("LIBGL_DEBUG")) {
 100             fprintf(stderr,
 101                "libGL: server lacks GLX extension. Using Mesa Xlib renderer.");
 102          }
 103 #endif
 104          t = _mesa_GetGLXDispatchTable();
 105          assert(t);  /* this has to work */
 106       }
 107
 108       if (t) {
 109          struct display_dispatch *d;
 110          d = (struct display_dispatch *) malloc(sizeof(struct display_dispatch));
 111          if (d) {
 112             d->Dpy = dpy;
 113             d->Table = t;
 114             /* insert at head of list */
 115             d->Next = DispatchList;
 116             DispatchList = d;
 117             /* update cache */
 118             prevDisplay = dpy;
 119             prevTable = t;
 120             return t;
 121          }
 122       }
 123    }
 124
 125    /* If we get here that means we can't use real GLX on this display
 126     * and the Mesa pseudo-GLX software renderer wasn't compiled in.
 127     * Or, we ran out of memory!
 128     */
 129    return NULL;
 130 }
 131
 132
 133 #define GET_DISPATCH(DPY, TABLE)        \
 134    if (DPY == prevDisplay) {            \
 135       TABLE = prevTable;                \
 136    }                                    \
 137    else if (!DPY) {                     \
 138       TABLE = NULL;                     \
 139    }                                    \
 140    else {                               \
 141       TABLE = get_dispatch(DPY);        \
 142    }
 143
 144
 145
 146
 147 /* Set by glXMakeCurrent() and glXMakeContextCurrent() only */
 148 #ifndef GLX_BUILD_IN_XLIB_MESA
 149 static GLXContext CurrentContext = 0;
 150 #define __glXGetCurrentContext() CurrentContext;
 151 #endif
 152
 153
 154 /*
 155  * GLX API entrypoints
 156  */
 157
 158 /*** GLX_VERSION_1_0 ***/
 159
 160 XVisualInfo *glXChooseVisual(Display *dpy, int screen, int *list)
 161 {
 162    struct _glxapi_table *t;
 163    GET_DISPATCH(dpy, t);
 164    if (!t)
 165       return NULL;
 166    return (t->ChooseVisual)(dpy, screen, list);
 167 }
 168
 169
 170 void glXCopyContext(Display *dpy, GLXContext src, GLXContext dst, unsigned long mask)
 171 {
 172    struct _glxapi_table *t;
 173    GET_DISPATCH(dpy, t);
 174    if (!t)
 175       return;
 176    (t->CopyContext)(dpy, src, dst, mask);
 177 }
 178
 179
 180 GLXContext glXCreateContext(Display *dpy, XVisualInfo *visinfo, GLXContext shareList, Bool direct)
 181 {
 182    struct _glxapi_table *t;
 183    GET_DISPATCH(dpy, t);
 184    if (!t)
 185       return 0;
 186    return (t->CreateContext)(dpy, visinfo, shareList, direct);
 187 }
 188
 189
 190 GLXPixmap glXCreateGLXPixmap(Display *dpy, XVisualInfo *visinfo, Pixmap pixmap)
 191 {
 192    struct _glxapi_table *t;
 193    GET_DISPATCH(dpy, t);
 194    if (!t)
 195       return 0;
 196    return (t->CreateGLXPixmap)(dpy, visinfo, pixmap);
 197 }
 198
 199
 200 void glXDestroyContext(Display *dpy, GLXContext ctx)
 201 {
 202    struct _glxapi_table *t;
 203    GET_DISPATCH(dpy, t);
 204    if (!t)
 205       return;
 206    (t->DestroyContext)(dpy, ctx);
 207 }
 208
 209
 210 void glXDestroyGLXPixmap(Display *dpy, GLXPixmap pixmap)
 211 {
 212    struct _glxapi_table *t;
 213    GET_DISPATCH(dpy, t);
 214    if (!t)
 215       return;
 216    (t->DestroyGLXPixmap)(dpy, pixmap);
 217 }
 218
 219
 220 int glXGetConfig(Display *dpy, XVisualInfo *visinfo, int attrib, int *value)
 221 {
 222    struct _glxapi_table *t;
 223    GET_DISPATCH(dpy, t);
 224    if (!t)
 225       return GLX_NO_EXTENSION;
 226    return (t->GetConfig)(dpy, visinfo, attrib, value);
 227 }
 228
 229
 230 #ifdef GLX_BUILD_IN_XLIB_MESA
 231 /* Use real libGL's glXGetCurrentContext() function */
 232 #else
 233 /* stand-alone Mesa */
 234 GLXContext glXGetCurrentContext(void)
 235 {
 236    return CurrentContext;
 237 }
 238 #endif
 239
 240
 241 #ifdef GLX_BUILD_IN_XLIB_MESA
 242 /* Use real libGL's glXGetCurrentContext() function */
 243 #else
 244 /* stand-alone Mesa */
 245 GLXDrawable glXGetCurrentDrawable(void)
 246 {
 247    __GLXcontext *gc = (__GLXcontext *) glXGetCurrentContext();
 248    return gc ? gc->currentDrawable : 0;
 249 }
 250 #endif
 251
 252
 253 Bool glXIsDirect(Display *dpy, GLXContext ctx)
 254 {
 255    struct _glxapi_table *t;
 256    GET_DISPATCH(dpy, t);
 257    if (!t)
 258       return False;
 259    return (t->IsDirect)(dpy, ctx);
 260 }
 261
 262
 263 Bool glXMakeCurrent(Display *dpy, GLXDrawable drawable, GLXContext ctx)
 264 {
 265    Bool b;
 266    struct _glxapi_table *t;
 267    GET_DISPATCH(dpy, t);
 268    if (!t)
 269       return False;
 270    b = (*t->MakeCurrent)(dpy, drawable, ctx);
 271 #ifndef  GLX_BUILD_IN_XLIB_MESA
 272    if (b) {
 273       CurrentContext = ctx;
 274    }
 275 #endif
 276    return b;
 277 }
 278
 279
 280 Bool glXQueryExtension(Display *dpy, int *errorb, int *event)
 281 {
 282    struct _glxapi_table *t;
 283    GET_DISPATCH(dpy, t);
 284    if (!t)
 285       return False;
 286    return (t->QueryExtension)(dpy, errorb, event);
 287 }
 288
 289
 290 Bool glXQueryVersion(Display *dpy, int *maj, int *min)
 291 {
 292    struct _glxapi_table *t;
 293    GET_DISPATCH(dpy, t);
 294    if (!t)
 295       return False;
 296    return (t->QueryVersion)(dpy, maj, min);
 297 }
 298
 299
 300 void glXSwapBuffers(Display *dpy, GLXDrawable drawable)
 301 {
 302    struct _glxapi_table *t;
 303    GET_DISPATCH(dpy, t);
 304    if (!t)
 305       return;
 306    (t->SwapBuffers)(dpy, drawable);
 307 }
 308
 309
 310 void glXUseXFont(Font font, int first, int count, int listBase)
 311 {
 312    struct _glxapi_table *t;
 313    Display *dpy = glXGetCurrentDisplay();
 314    GET_DISPATCH(dpy, t);
 315    if (!t)
 316       return;
 317    (t->UseXFont)(font, first, count, listBase);
 318 }
 319
 320
 321 void glXWaitGL(void)
 322 {
 323    struct _glxapi_table *t;
 324    Display *dpy = glXGetCurrentDisplay();
 325    GET_DISPATCH(dpy, t);
 326    if (!t)
 327       return;
 328    (t->WaitGL)();
 329 }
 330
 331
 332 void glXWaitX(void)
 333 {
 334    struct _glxapi_table *t;
 335    Display *dpy = glXGetCurrentDisplay();
 336    GET_DISPATCH(dpy, t);
 337    if (!t)
 338       return;
 339    (t->WaitX)();
 340 }
 341
 342
 343
 344 /*** GLX_VERSION_1_1 ***/
 345
 346 const char *glXGetClientString(Display *dpy, int name)
 347 {
 348    struct _glxapi_table *t;
 349    GET_DISPATCH(dpy, t);
 350    if (!t)
 351       return NULL;
 352    return (t->GetClientString)(dpy, name);
 353 }
 354
 355
 356 const char *glXQueryExtensionsString(Display *dpy, int screen)
 357 {
 358    struct _glxapi_table *t;
 359    GET_DISPATCH(dpy, t);
 360    if (!t)
 361       return NULL;
 362    return (t->QueryExtensionsString)(dpy, screen);
 363 }
 364
 365
 366 const char *glXQueryServerString(Display *dpy, int screen, int name)
 367 {
 368    struct _glxapi_table *t;
 369    GET_DISPATCH(dpy, t);
 370    if (!t)
 371       return NULL;
 372    return (t->QueryServerString)(dpy, screen, name);
 373 }
 374
 375
 376 /*** GLX_VERSION_1_2 ***/
 377
 378 #if !defined(GLX_BUILD_IN_XLIB_MESA)
 379 Display *glXGetCurrentDisplay(void)
 380 {
 381    /* Same code as in libGL's glxext.c */
 382    __GLXcontext *gc = (__GLXcontext *) glXGetCurrentContext();
 383    if (NULL == gc) return NULL;
 384    return gc->currentDpy;
 385 }
 386 #endif
 387
 388
 389
 390 /*** GLX_VERSION_1_3 ***/
 391
 392 GLXFBConfig *glXChooseFBConfig(Display *dpy, int screen, const int *attribList, int *nitems)
 393 {
 394    struct _glxapi_table *t;
 395    GET_DISPATCH(dpy, t);
 396    if (!t)
 397       return 0;
 398    return (t->ChooseFBConfig)(dpy, screen, attribList, nitems);
 399 }
 400
 401
 402 GLXContext glXCreateNewContext(Display *dpy, GLXFBConfig config, int renderType, GLXContext shareList, Bool direct)
 403 {
 404    struct _glxapi_table *t;
 405    GET_DISPATCH(dpy, t);
 406    if (!t)
 407       return 0;
 408    return (t->CreateNewContext)(dpy, config, renderType, shareList, direct);
 409 }
 410
 411
 412 GLXPbuffer glXCreatePbuffer(Display *dpy, GLXFBConfig config, const int *attribList)
 413 {
 414    struct _glxapi_table *t;
 415    GET_DISPATCH(dpy, t);
 416    if (!t)
 417       return 0;
 418    return (t->CreatePbuffer)(dpy, config, attribList);
 419 }
 420
 421
 422 GLXPixmap glXCreatePixmap(Display *dpy, GLXFBConfig config, Pixmap pixmap, const int *attribList)
 423 {
 424    struct _glxapi_table *t;
 425    GET_DISPATCH(dpy, t);
 426    if (!t)
 427       return 0;
 428    return (t->CreatePixmap)(dpy, config, pixmap, attribList);
 429 }
 430
 431
 432 GLXWindow glXCreateWindow(Display *dpy, GLXFBConfig config, Window win, const int *attribList)
 433 {
 434    struct _glxapi_table *t;
 435    GET_DISPATCH(dpy, t);
 436    if (!t)
 437       return 0;
 438    return (t->CreateWindow)(dpy, config, win, attribList);
 439 }
 440
 441
 442 void glXDestroyPbuffer(Display *dpy, GLXPbuffer pbuf)
 443 {
 444    struct _glxapi_table *t;
 445    GET_DISPATCH(dpy, t);
 446    if (!t)
 447       return;
 448    (t->DestroyPbuffer)(dpy, pbuf);
 449 }
 450
 451
 452 void glXDestroyPixmap(Display *dpy, GLXPixmap pixmap)
 453 {
 454    struct _glxapi_table *t;
 455    GET_DISPATCH(dpy, t);
 456    if (!t)
 457       return;
 458    (t->DestroyPixmap)(dpy, pixmap);
 459 }
 460
 461
 462 void glXDestroyWindow(Display *dpy, GLXWindow window)
 463 {
 464    struct _glxapi_table *t;
 465    GET_DISPATCH(dpy, t);
 466    if (!t)
 467       return;
 468    (t->DestroyWindow)(dpy, window);
 469 }
 470
 471
 472 #ifdef GLX_BUILD_IN_XLIB_MESA
 473 /* Use the glXGetCurrentReadDrawable() function from libGL */
 474 #else
 475 GLXDrawable glXGetCurrentReadDrawable(void)
 476 {
 477    __GLXcontext *gc = (__GLXcontext *) glXGetCurrentContext();
 478    return gc ? gc->currentReadable : 0;
 479 }
 480 #endif
 481
 482
 483 int glXGetFBConfigAttrib(Display *dpy, GLXFBConfig config, int attribute, int *value)
 484 {
 485    struct _glxapi_table *t;
 486    GET_DISPATCH(dpy, t);
 487    if (!t)
 488       return GLX_NO_EXTENSION;
 489    return (t->GetFBConfigAttrib)(dpy, config, attribute, value);
 490 }
 491
 492
 493 GLXFBConfig *glXGetFBConfigs(Display *dpy, int screen, int *nelements)
 494 {
 495    struct _glxapi_table *t;
 496    GET_DISPATCH(dpy, t);
 497    if (!t)
 498       return 0;
 499    return (t->GetFBConfigs)(dpy, screen, nelements);
 500 }
 501
 502 void glXGetSelectedEvent(Display *dpy, GLXDrawable drawable, unsigned long *mask)
 503 {
 504    struct _glxapi_table *t;
 505    GET_DISPATCH(dpy, t);
 506    if (!t)
 507       return;
 508    (t->GetSelectedEvent)(dpy, drawable, mask);
 509 }
 510
 511
 512 XVisualInfo *glXGetVisualFromFBConfig(Display *dpy, GLXFBConfig config)
 513 {
 514    struct _glxapi_table *t;
 515    GET_DISPATCH(dpy, t);
 516    if (!t)
 517       return NULL;
 518    return (t->GetVisualFromFBConfig)(dpy, config);
 519 }
 520
 521
 522 Bool glXMakeContextCurrent(Display *dpy, GLXDrawable draw, GLXDrawable read, GLXContext ctx)
 523 {
 524    Bool b;
 525    struct _glxapi_table *t;
 526    GET_DISPATCH(dpy, t);
 527    if (!t)
 528       return False;
 529    b = (t->MakeContextCurrent)(dpy, draw, read, ctx);
 530 #ifndef GLX_BUILD_IN_XLIB_MESA
 531    if (b) {
 532       CurrentContext = ctx;
 533    }
 534 #endif
 535    return b;
 536 }
 537
 538
 539 int glXQueryContext(Display *dpy, GLXContext ctx, int attribute, int *value)
 540 {
 541    struct _glxapi_table *t;
 542    GET_DISPATCH(dpy, t);
 543    assert(t);
 544    if (!t)
 545       return 0; /* XXX correct? */
 546    return (t->QueryContext)(dpy, ctx, attribute, value);
 547 }
 548
 549
 550 void glXQueryDrawable(Display *dpy, GLXDrawable draw, int attribute, unsigned int *value)
 551 {
 552    struct _glxapi_table *t;
 553    GET_DISPATCH(dpy, t);
 554    if (!t)
 555       return;
 556    (t->QueryDrawable)(dpy, draw, attribute, value);
 557 }
 558
 559
 560 void glXSelectEvent(Display *dpy, GLXDrawable drawable, unsigned long mask)
 561 {
 562    struct _glxapi_table *t;
 563    GET_DISPATCH(dpy, t);
 564    if (!t)
 565       return;
 566    (t->SelectEvent)(dpy, drawable, mask);
 567 }
 568
 569
 570
 571 /*** GLX_SGI_swap_control ***/
 572
 573 int glXSwapIntervalSGI(int interval)
 574 {
 575    struct _glxapi_table *t;
 576    Display *dpy = glXGetCurrentDisplay();
 577    GET_DISPATCH(dpy, t);
 578    if (!t)
 579       return 0;
 580    return (t->SwapIntervalSGI)(interval);
 581 }
 582
 583
 584
 585 /*** GLX_SGI_video_sync ***/
 586
 587 int glXGetVideoSyncSGI(unsigned int *count)
 588 {
 589    struct _glxapi_table *t;
 590    Display *dpy = glXGetCurrentDisplay();
 591    GET_DISPATCH(dpy, t);
 592    if (!t)
 593       return 0;
 594    return (t->GetVideoSyncSGI)(count);
 595 }
 596
 597 int glXWaitVideoSyncSGI(int divisor, int remainder, unsigned int *count)
 598 {
 599    struct _glxapi_table *t;
 600    Display *dpy = glXGetCurrentDisplay();
 601    GET_DISPATCH(dpy, t);
 602    if (!t)
 603       return 0;
 604    return (t->WaitVideoSyncSGI)(divisor, remainder, count);
 605 }
 606
 607
 608
 609 /*** GLX_SGI_make_current_read ***/
 610
 611 Bool glXMakeCurrentReadSGI(Display *dpy, GLXDrawable draw, GLXDrawable read, GLXContext ctx)
 612 {
 613    struct _glxapi_table *t;
 614    GET_DISPATCH(dpy, t);
 615    if (!t)
 616       return 0;
 617    return (t->MakeCurrentReadSGI)(dpy, draw, read, ctx);
 618 }
 619
 620 #ifdef GLX_BUILD_IN_XLIB_MESA
 621 /* Use glXGetCurrentReadDrawableSGI() from libGL */
 622 #else
 623 /* stand-alone Mesa */
 624 GLXDrawable glXGetCurrentReadDrawableSGI(void)
 625 {
 626    return glXGetCurrentReadDrawable();
 627 }
 628 #endif
 629
 630
 631 #if defined(_VL_H)
 632
 633 GLXVideoSourceSGIX glXCreateGLXVideoSourceSGIX(Display *dpy, int screen, VLServer server, VLPath path, int nodeClass, VLNode drainNode)
 634 {
 635    struct _glxapi_table *t;
 636    GET_DISPATCH(dpy, t);
 637    if (!t)
 638       return 0;
 639    return (t->CreateGLXVideoSourceSGIX)(dpy, screen, server, path, nodeClass, drainNode);
 640 }
 641
 642 void glXDestroyGLXVideoSourceSGIX(Display *dpy, GLXVideoSourceSGIX src)
 643 {
 644    struct _glxapi_table *t;
 645    GET_DISPATCH(dpy, t);
 646    if (!t)
 647       return 0;
 648    return (t->DestroyGLXVideoSourceSGIX)(dpy, src);
 649 }
 650
 651 #endif
 652
 653
 654 /*** GLX_EXT_import_context ***/
 655
 656 void glXFreeContextEXT(Display *dpy, GLXContext context)
 657 {
 658    struct _glxapi_table *t;
 659    GET_DISPATCH(dpy, t);
 660    if (!t)
 661       return;
 662    (t->FreeContextEXT)(dpy, context);
 663 }
 664
 665 #ifdef GLX_BUILD_IN_XLIB_MESA
 666 /* Use real libGL's glXGetContextIDEXT() function */
 667 #else
 668 /* stand-alone Mesa */
 669 GLXContextID glXGetContextIDEXT(const GLXContext context)
 670 {
 671    return ((__GLXcontext *) context)->xid;
 672 }
 673 #endif
 674
 675 Display *glXGetCurrentDisplayEXT(void)
 676 {
 677    return glXGetCurrentDisplay();
 678 }
 679
 680 GLXContext glXImportContextEXT(Display *dpy, GLXContextID contextID)
 681 {
 682    struct _glxapi_table *t;
 683    GET_DISPATCH(dpy, t);
 684    if (!t)
 685       return 0;
 686    return (t->ImportContextEXT)(dpy, contextID);
 687 }
 688
 689 int glXQueryContextInfoEXT(Display *dpy, GLXContext context, int attribute,int *value)
 690 {
 691    struct _glxapi_table *t;
 692    GET_DISPATCH(dpy, t);
 693    if (!t)
 694       return 0;  /* XXX ok? */
 695    return (t->QueryContextInfoEXT)(dpy, context, attribute, value);
 696 }
 697
 698
 699
 700 /*** GLX_SGIX_fbconfig ***/
 701
 702 int glXGetFBConfigAttribSGIX(Display *dpy, GLXFBConfigSGIX config, int attribute, int *value)
 703 {
 704    struct _glxapi_table *t;
 705    GET_DISPATCH(dpy, t);
 706    if (!t)
 707       return 0;
 708    return (t->GetFBConfigAttribSGIX)(dpy, config, attribute, value);
 709 }
 710
 711 GLXFBConfigSGIX *glXChooseFBConfigSGIX(Display *dpy, int screen, int *attrib_list, int *nelements)
 712 {
 713    struct _glxapi_table *t;
 714    GET_DISPATCH(dpy, t);
 715    if (!t)
 716       return 0;
 717    return (t->ChooseFBConfigSGIX)(dpy, screen, attrib_list, nelements);
 718 }
 719
 720 GLXPixmap glXCreateGLXPixmapWithConfigSGIX(Display *dpy, GLXFBConfigSGIX config, Pixmap pixmap)
 721 {
 722    struct _glxapi_table *t;
 723    GET_DISPATCH(dpy, t);
 724    if (!t)
 725       return 0;
 726    return (t->CreateGLXPixmapWithConfigSGIX)(dpy, config, pixmap);
 727 }
 728
 729 GLXContext glXCreateContextWithConfigSGIX(Display *dpy, GLXFBConfigSGIX config, int render_type, GLXContext share_list, Bool direct)
 730 {
 731    struct _glxapi_table *t;
 732    GET_DISPATCH(dpy, t);
 733    if (!t)
 734       return 0;
 735    return (t->CreateContextWithConfigSGIX)(dpy, config, render_type, share_list, direct);
 736 }
 737
 738 XVisualInfo * glXGetVisualFromFBConfigSGIX(Display *dpy, GLXFBConfigSGIX config)
 739 {
 740    struct _glxapi_table *t;
 741    GET_DISPATCH(dpy, t);
 742    if (!t)
 743       return 0;
 744    return (t->GetVisualFromFBConfigSGIX)(dpy, config);
 745 }
 746
 747 GLXFBConfigSGIX glXGetFBConfigFromVisualSGIX(Display *dpy, XVisualInfo *vis)
 748 {
 749    struct _glxapi_table *t;
 750    GET_DISPATCH(dpy, t);
 751    if (!t)
 752       return 0;
 753    return (t->GetFBConfigFromVisualSGIX)(dpy, vis);
 754 }
 755
 756
 757
 758 /*** GLX_SGIX_pbuffer ***/
 759
 760 GLXPbufferSGIX glXCreateGLXPbufferSGIX(Display *dpy, GLXFBConfigSGIX config, unsigned int width, unsigned int height, int *attrib_list)
 761 {
 762    struct _glxapi_table *t;
 763    GET_DISPATCH(dpy, t);
 764    if (!t)
 765       return 0;
 766    return (t->CreateGLXPbufferSGIX)(dpy, config, width, height, attrib_list);
 767 }
 768
 769 void glXDestroyGLXPbufferSGIX(Display *dpy, GLXPbufferSGIX pbuf)
 770 {
 771    struct _glxapi_table *t;
 772    GET_DISPATCH(dpy, t);
 773    if (!t)
 774       return;
 775    (t->DestroyGLXPbufferSGIX)(dpy, pbuf);
 776 }
 777
 778 int glXQueryGLXPbufferSGIX(Display *dpy, GLXPbufferSGIX pbuf, int attribute, unsigned int *value)
 779 {
 780    struct _glxapi_table *t;
 781    GET_DISPATCH(dpy, t);
 782    if (!t)
 783       return 0;
 784    return (t->QueryGLXPbufferSGIX)(dpy, pbuf, attribute, value);
 785 }
 786
 787 void glXSelectEventSGIX(Display *dpy, GLXDrawable drawable, unsigned long mask)
 788 {
 789    struct _glxapi_table *t;
 790    GET_DISPATCH(dpy, t);
 791    if (!t)
 792       return;
 793    (t->SelectEventSGIX)(dpy, drawable, mask);
 794 }
 795
 796 void glXGetSelectedEventSGIX(Display *dpy, GLXDrawable drawable, unsigned long *mask)
 797 {
 798    struct _glxapi_table *t;
 799    GET_DISPATCH(dpy, t);
 800    if (!t)
 801       return;
 802    (t->GetSelectedEventSGIX)(dpy, drawable, mask);
 803 }
 804
 805
 806
 807 /*** GLX_SGI_cushion ***/
 808
 809 void glXCushionSGI(Display *dpy, Window win, float cushion)
 810 {
 811    struct _glxapi_table *t;
 812    GET_DISPATCH(dpy, t);
 813    if (!t)
 814       return;
 815    (t->CushionSGI)(dpy, win, cushion);
 816 }
 817
 818
 819
 820 /*** GLX_SGIX_video_resize ***/
 821
 822 int glXBindChannelToWindowSGIX(Display *dpy, int screen, int channel , Window window)
 823 {
 824    struct _glxapi_table *t;
 825    GET_DISPATCH(dpy, t);
 826    if (!t)
 827       return 0;
 828    return (t->BindChannelToWindowSGIX)(dpy, screen, channel, window);
 829 }
 830
 831 int glXChannelRectSGIX(Display *dpy, int screen, int channel, int x, int y, int w, int h)
 832 {
 833    struct _glxapi_table *t;
 834    GET_DISPATCH(dpy, t);
 835    if (!t)
 836       return 0;
 837    return (t->ChannelRectSGIX)(dpy, screen, channel, x, y, w, h);
 838 }
 839
 840 int glXQueryChannelRectSGIX(Display *dpy, int screen, int channel, int *x, int *y, int *w, int *h)
 841 {
 842    struct _glxapi_table *t;
 843    GET_DISPATCH(dpy, t);
 844    if (!t)
 845       return 0;
 846    return (t->QueryChannelRectSGIX)(dpy, screen, channel, x, y, w, h);
 847 }
 848
 849 int glXQueryChannelDeltasSGIX(Display *dpy, int screen, int channel, int *dx, int *dy, int *dw, int *dh)
 850 {
 851    struct _glxapi_table *t;
 852    GET_DISPATCH(dpy, t);
 853    if (!t)
 854       return 0;
 855    return (t->QueryChannelDeltasSGIX)(dpy, screen, channel, dx, dy, dw, dh);
 856 }
 857
 858 int glXChannelRectSyncSGIX(Display *dpy, int screen, int channel, GLenum synctype)
 859 {
 860    struct _glxapi_table *t;
 861    GET_DISPATCH(dpy, t);
 862    if (!t)
 863       return 0;
 864    return (t->ChannelRectSyncSGIX)(dpy, screen, channel, synctype);
 865 }
 866
 867
 868
 869 #if defined(_DM_BUFFER_H_)
 870
 871 Bool glXAssociateDMPbufferSGIX(Display *dpy, GLXPbufferSGIX pbuffer, DMparams *params, DMbuffer dmbuffer)
 872 {
 873    struct _glxapi_table *t;
 874    GET_DISPATCH(dpy, t);
 875    if (!t)
 876       return False;
 877    return (t->AssociateDMPbufferSGIX)(dpy, pbuffer, params, dmbuffer);
 878 }
 879
 880 #endif
 881
 882
 883 /*** GLX_SGIX_swap_group ***/
 884
 885 void glXJoinSwapGroupSGIX(Display *dpy, GLXDrawable drawable, GLXDrawable member)
 886 {
 887    struct _glxapi_table *t;
 888    GET_DISPATCH(dpy, t);
 889    if (!t)
 890       return;
 891    (*t->JoinSwapGroupSGIX)(dpy, drawable, member);
 892 }
 893
 894
 895 /*** GLX_SGIX_swap_barrier ***/
 896
 897 void glXBindSwapBarrierSGIX(Display *dpy, GLXDrawable drawable, int barrier)
 898 {
 899    struct _glxapi_table *t;
 900    GET_DISPATCH(dpy, t);
 901    if (!t)
 902       return;
 903    (*t->BindSwapBarrierSGIX)(dpy, drawable, barrier);
 904 }
 905
 906 Bool glXQueryMaxSwapBarriersSGIX(Display *dpy, int screen, int *max)
 907 {
 908    struct _glxapi_table *t;
 909    GET_DISPATCH(dpy, t);
 910    if (!t)
 911       return False;
 912    return (*t->QueryMaxSwapBarriersSGIX)(dpy, screen, max);
 913 }
 914
 915
 916
 917 /*** GLX_SUN_get_transparent_index ***/
 918
 919 Status glXGetTransparentIndexSUN(Display *dpy, Window overlay, Window underlay, long *pTransparent)
 920 {
 921    struct _glxapi_table *t;
 922    GET_DISPATCH(dpy, t);
 923    if (!t)
 924       return False;
 925    return (*t->GetTransparentIndexSUN)(dpy, overlay, underlay, pTransparent);
 926 }
 927
 928
 929
 930 /*** GLX_MESA_copy_sub_buffer ***/
 931
 932 void glXCopySubBufferMESA(Display *dpy, GLXDrawable drawable, int x, int y, int width, int height)
 933 {
 934    struct _glxapi_table *t;
 935    GET_DISPATCH(dpy, t);
 936    if (!t)
 937       return;
 938    (t->CopySubBufferMESA)(dpy, drawable, x, y, width, height);
 939 }
 940
 941
 942
 943 /*** GLX_MESA_release_buffers ***/
 944
 945 Bool glXReleaseBuffersMESA(Display *dpy, Window w)
 946 {
 947    struct _glxapi_table *t;
 948    GET_DISPATCH(dpy, t);
 949    if (!t)
 950       return False;
 951    return (t->ReleaseBuffersMESA)(dpy, w);
 952 }
 953
 954
 955
 956 /*** GLX_MESA_pixmap_colormap ***/
 957
 958 GLXPixmap glXCreateGLXPixmapMESA(Display *dpy, XVisualInfo *visinfo, Pixmap pixmap, Colormap cmap)
 959 {
 960    struct _glxapi_table *t;
 961    GET_DISPATCH(dpy, t);
 962    if (!t)
 963       return 0;
 964    return (t->CreateGLXPixmapMESA)(dpy, visinfo, pixmap, cmap);
 965 }
 966
 967
 968
 969 /*** GLX_MESA_set_3dfx_mode ***/
 970
 971 Bool glXSet3DfxModeMESA(int mode)
 972 {
 973    struct _glxapi_table *t;
 974    Display *dpy = glXGetCurrentDisplay();
 975    GET_DISPATCH(dpy, t);
 976    if (!t)
 977       return False;
 978    return (t->Set3DfxModeMESA)(mode);
 979 }
 980
 981
 982
 983
 984 /**********************************************************************/
 985 /* GLX API management functions                                       */
 986 /**********************************************************************/
 987
 988
 989 const char *
 990 _glxapi_get_version(void)
 991 {
 992    return "1.3";
 993 }
 994
 995
 996 /*
 997  * Return array of extension strings.
 998  */
 999 const char **
1000 _glxapi_get_extensions(void)
1001 {
1002    static const char *extensions[] = {
1003 #ifdef GLX_EXT_import_context
1004       "GLX_EXT_import_context",
1005 #endif
1006 #ifdef GLX_SGI_video_sync
1007       "GLX_SGI_video_sync",
1008 #endif
1009 #ifdef GLX_MESA_copy_sub_buffer
1010       "GLX_MESA_copy_sub_buffer",
1011 #endif
1012 #ifdef GLX_MESA_release_buffers
1013       "GLX_MESA_release_buffers",
1014 #endif
1015 #ifdef GLX_MESA_pixmap_colormap
1016       "GLX_MESA_pixmap_colormap",
1017 #endif
1018 #ifdef GLX_MESA_set_3dfx_mode
1019       "GLX_MESA_set_3dfx_mode",
1020 #endif
1021       NULL
1022    };
1023    return extensions;
1024 }
1025
1026
1027 /*
1028  * Return size of the GLX dispatch table, in entries, not bytes.
1029  */
1030 GLuint
1031 _glxapi_get_dispatch_table_size(void)
1032 {
1033    return sizeof(struct _glxapi_table) / sizeof(void *);
1034 }
1035
1036
1037 static int
1038 generic_no_op_func(void)
1039 {
1040    return 0;
1041 }
1042
1043
1044 /*
1045  * Initialize all functions in given dispatch table to be no-ops
1046  */
1047 void
1048 _glxapi_set_no_op_table(struct _glxapi_table *t)
1049 {
1050    GLuint n = _glxapi_get_dispatch_table_size();
1051    GLuint i;
1052    void **dispatch = (void **) t;
1053    for (i = 0; i < n; i++) {
1054       dispatch[i] = (void *) generic_no_op_func;
1055    }
1056 }
1057
1058
1059 #if 00
1060 /*
1061  * Open the named library and use dlsym() to populate the given dispatch
1062  * table with GLX function pointers.
1063  * Return: true = all OK
1064  *         false = can't open libName or can't get required GLX function
1065  */
1066 GLboolean
1067 _glxapi_load_library_table(const char *libName, struct _glxapi_table *t)
1068 {
1069    void *libHandle;
1070    void **entry;   /* used to avoid a lot of cast/type warnings */
1071
1072    libHandle = dlopen(libName, 0);
1073    if (!libHandle) {
1074       return GL_FALSE;
1075    }
1076
1077 #define GET_REQ_FUNCTION(ENTRY, NAME)                                   \
1078    entry = (void **) &(t->ENTRY);                                       \
1079    *entry = dlsym(libHandle, NAME);                                     \
1080    if (!*entry) {                                                       \
1081       fprintf(stderr, "libGL Error: couldn't load %s from %s\n",        \
1082               NAME, libName);                                           \
1083       dlclose(libHandle);                                               \
1084       return GL_FALSE;                                                  \
1085    }
1086
1087    /* 1.0 and 1.1 functions */
1088    GET_REQ_FUNCTION(ChooseVisual, "glXChooseVisual");
1089    GET_REQ_FUNCTION(CopyContext, "glXCopyContext");
1090    GET_REQ_FUNCTION(CreateContext, "glXCreateContext");
1091    GET_REQ_FUNCTION(CreateGLXPixmap, "glXCreateGLXPixmap");
1092    GET_REQ_FUNCTION(DestroyContext, "glXDestroyContext");
1093    GET_REQ_FUNCTION(GetConfig, "glXGetConfig");
1094    GET_REQ_FUNCTION(IsDirect, "glXIsDirect");
1095    GET_REQ_FUNCTION(MakeCurrent, "glXMakeCurrent");
1096    GET_REQ_FUNCTION(QueryExtension, "glXQueryExtension");
1097    GET_REQ_FUNCTION(QueryVersion, "glXQueryVersion");
1098    GET_REQ_FUNCTION(SwapBuffers, "glXSwapBuffers");
1099    GET_REQ_FUNCTION(UseXFont, "glXUseXFont");
1100    GET_REQ_FUNCTION(WaitGL, "glXWaitGL");
1101    GET_REQ_FUNCTION(WaitX, "glXWaitX");
1102    GET_REQ_FUNCTION(GetClientString, "glXGetClientString");
1103    GET_REQ_FUNCTION(QueryExtensionsString, "glXQueryExtensionsString");
1104    GET_REQ_FUNCTION(QueryServerString, "glXQueryServerString");
1105
1106 #define GET_OPT_FUNCTION(ENTRY, NAME)                                   \
1107    entry = (void **) &(t->ENTRY);                                       \
1108    *entry = dlsym(libHandle, NAME);                                     \
1109    if (!*entry) {                                                       \
1110       *entry = (void *) generic_no_op_func;                             \
1111    }
1112
1113    /* 1.2, 1.3 and extensions */
1114    GET_OPT_FUNCTION(ChooseFBConfig, "glXChooseFBConfig");
1115    GET_OPT_FUNCTION(CreateNewContext, "glXCreateNewContext");
1116    GET_OPT_FUNCTION(CreatePbuffer, "glXCreatePbuffer");
1117    GET_OPT_FUNCTION(CreatePixmap, "glXCreatePixmap");
1118    GET_OPT_FUNCTION(CreateWindow, "glXCreateWindow");
1119    GET_OPT_FUNCTION(DestroyPbuffer, "glXDestroyPbuffer");
1120    GET_OPT_FUNCTION(DestroyPixmap, "glXDestroyPixmap");
1121    GET_OPT_FUNCTION(DestroyWindow, "glXDestroyWindow");
1122    GET_OPT_FUNCTION(GetFBConfigAttrib, "glXGetFBConfigAttrib");
1123    GET_OPT_FUNCTION(GetFBConfigs, "glXGetFBConfigs");
1124    GET_OPT_FUNCTION(GetSelectedEvent, "glXGetSelectedEvent");
1125    GET_OPT_FUNCTION(GetVisualFromFBConfig, "glXGetVisualFromFBConfig");
1126    GET_OPT_FUNCTION(MakeContextCurrent, "glXMakeContextCurrent");
1127    GET_OPT_FUNCTION(QueryContext, "glXQueryContext");
1128    GET_OPT_FUNCTION(QueryDrawable, "glXQueryDrawable");
1129    GET_OPT_FUNCTION(SelectEvent, "glXSelectEvent");
1130    /*** GLX_SGI_swap_control ***/
1131    GET_OPT_FUNCTION(SwapIntervalSGI, "glXSwapIntervalSGI");
1132    /*** GLX_SGI_video_sync ***/
1133    GET_OPT_FUNCTION(GetVideoSyncSGI, "glXGetVideoSyncSGI");
1134    GET_OPT_FUNCTION(WaitVideoSyncSGI, "glXWaitVideoSyncSGI");
1135    /*** GLX_SGI_make_current_read ***/
1136    GET_OPT_FUNCTION(MakeCurrentReadSGI, "glXMakeCurrentReadSGI");
1137    GET_OPT_FUNCTION(GetCurrentReadDrawableSGI, "glXGetCurrentReadDrawableSGI");
1138    /*** GLX_SGIX_video_source ***/
1139 #if defined(_VL_H)
1140    GET_OPT_FUNCTION(CreateGLXVideoSourceSGIX, "glXCreateGLXVideoSourceSGIX");
1141    GET_OPT_FUNCTION(DestroyGLXVideoSourceSGIX, "glXDestroyGLXVideoSourceSGIX");
1142 #endif
1143    /*** GLX_EXT_import_context ***/
1144    GET_OPT_FUNCTION(FreeContextEXT, "glXFreeContextEXT");
1145    GET_OPT_FUNCTION(GetContextIDEXT, "glXGetContextIDEXT");
1146    GET_OPT_FUNCTION(GetCurrentDisplayEXT, "glXGetCurrentDisplayEXT");
1147    GET_OPT_FUNCTION(ImportContextEXT, "glXImportContextEXT");
1148    GET_OPT_FUNCTION(QueryContextInfoEXT, "glXQueryContextInfoEXT");
1149    /*** GLX_SGIX_fbconfig ***/
1150    GET_OPT_FUNCTION(GetFBConfigAttribSGIX, "glXGetFBConfigAttribSGIX");
1151    GET_OPT_FUNCTION(ChooseFBConfigSGIX, "glXChooseFBConfigSGIX");
1152    GET_OPT_FUNCTION(CreateGLXPixmapWithConfigSGIX, "glXCreateGLXPixmapWithConfigSGIX");
1153    GET_OPT_FUNCTION(CreateContextWithConfigSGIX, "glXCreateContextWithConfigSGIX");
1154    GET_OPT_FUNCTION(GetVisualFromFBConfigSGIX, "glXGetVisualFromFBConfigSGIX");
1155    GET_OPT_FUNCTION(GetFBConfigFromVisualSGIX, "glXGetFBConfigFromVisualSGIX");
1156    /*** GLX_SGIX_pbuffer ***/
1157    GET_OPT_FUNCTION(CreateGLXPbufferSGIX, "glXCreateGLXPbufferSGIX");
1158    GET_OPT_FUNCTION(DestroyGLXPbufferSGIX, "glXDestroyGLXPbufferSGIX");
1159    GET_OPT_FUNCTION(QueryGLXPbufferSGIX, "glXQueryGLXPbufferSGIX");
1160    GET_OPT_FUNCTION(SelectEventSGIX, "glXSelectEventSGIX");
1161    GET_OPT_FUNCTION(GetSelectedEventSGIX, "glXGetSelectedEventSGIX");
1162    /*** GLX_SGI_cushion ***/
1163    GET_OPT_FUNCTION(CushionSGI, "glXCushionSGI");
1164    /*** GLX_SGIX_video_resize ***/
1165    GET_OPT_FUNCTION(BindChannelToWindowSGIX, "glXBindChannelToWindowSGIX");
1166    GET_OPT_FUNCTION(ChannelRectSGIX, "glXChannelRectSGIX");
1167    GET_OPT_FUNCTION(QueryChannelRectSGIX, "glXQueryChannelRectSGIX");
1168    GET_OPT_FUNCTION(QueryChannelDeltasSGIX, "glXQueryChannelDeltasSGIX");
1169    GET_OPT_FUNCTION(ChannelRectSyncSGIX, "glXChannelRectSyncSGIX");
1170    /*** GLX_SGIX_dmbuffer ***/
1171 #if defined (_DM_BUFFER_H_)
1172    GET_OPT_FUNCTION(AssociateDMPbufferSGIX, "glXAssociateDMPbufferSGIX");
1173 #endif
1174    /*** GLX_SGIX_swap_group ***/
1175    GET_OPT_FUNCTION(JoinSwapGroupSGIX, "glXJoinSwapGroupSGIX");
1176    /*** GLX_SGIX_swap_barrier ***/
1177    GET_OPT_FUNCTION(BindSwapBarrierSGIX, "glXBindSwapBarrierSGIX");
1178    GET_OPT_FUNCTION(QueryMaxSwapBarriersSGIX, "glXQueryMaxSwapBarriersSGIX");
1179    /*** GLX_SUN_get_transparent_index ***/
1180    GET_OPT_FUNCTION(GetTransparentIndexSUN, "glXGetTransparentIndexSUN");
1181    /*** GLX_MESA_copy_sub_buffer ***/
1182    GET_OPT_FUNCTION(CopySubBufferMESA, "glXCopySubBufferMESA");
1183    /*** GLX_MESA_release_buffers ***/
1184    GET_OPT_FUNCTION(ReleaseBuffersMESA, "glXReleaseBuffersMESA");
1185    /*** GLX_MESA_pixmap_colormap ***/
1186    GET_OPT_FUNCTION(CreateGLXPixmapMESA, "glXCreateGLXPixmapMESA");
1187    /*** GLX_MESA_set_3dfx_mode ***/
1188    GET_OPT_FUNCTION(Set3DfxModeMESA, "glXSet3DfxModeMESA");
1189
1190    return GL_TRUE;
1191 }
1192 #endif
1193
1194
1195
1196 struct name_address_pair {
1197    const char *Name;
1198    GLvoid *Address;
1199 };
1200
1201 static struct name_address_pair GLX_functions[] = {
1202    /*** GLX_VERSION_1_0 ***/
1203    { "glXChooseVisual", (GLvoid *) glXChooseVisual },
1204    { "glXCopyContext", (GLvoid *) glXCopyContext },
1205    { "glXCreateContext", (GLvoid *) glXCreateContext },
1206    { "glXCreateGLXPixmap", (GLvoid *) glXCreateGLXPixmap },
1207    { "glXDestroyContext", (GLvoid *) glXDestroyContext },
1208    { "glXDestroyGLXPixmap", (GLvoid *) glXDestroyGLXPixmap },
1209    { "glXGetConfig", (GLvoid *) glXGetConfig },
1210    { "glXGetCurrentContext", (GLvoid *) glXGetCurrentContext },
1211    { "glXGetCurrentDrawable", (GLvoid *) glXGetCurrentDrawable },
1212    { "glXIsDirect", (GLvoid *) glXIsDirect },
1213    { "glXMakeCurrent", (GLvoid *) glXMakeCurrent },
1214    { "glXQueryExtension", (GLvoid *) glXQueryExtension },
1215    { "glXQueryVersion", (GLvoid *) glXQueryVersion },
1216    { "glXSwapBuffers", (GLvoid *) glXSwapBuffers },
1217    { "glXUseXFont", (GLvoid *) glXUseXFont },
1218    { "glXWaitGL", (GLvoid *) glXWaitGL },
1219    { "glXWaitX", (GLvoid *) glXWaitX },
1220
1221    /*** GLX_VERSION_1_1 ***/
1222    { "glXGetClientString", (GLvoid *) glXGetClientString },
1223    { "glXQueryExtensionsString", (GLvoid *) glXQueryExtensionsString },
1224    { "glXQueryServerString", (GLvoid *) glXQueryServerString },
1225
1226    /*** GLX_VERSION_1_2 ***/
1227    { "glXGetCurrentDisplay", (GLvoid *) glXGetCurrentDisplay },
1228
1229    /*** GLX_VERSION_1_3 ***/
1230    { "glXChooseFBConfig", (GLvoid *) glXChooseFBConfig },
1231    { "glXCreateNewContext", (GLvoid *) glXCreateNewContext },
1232    { "glXCreatePbuffer", (GLvoid *) glXCreatePbuffer },
1233    { "glXCreatePixmap", (GLvoid *) glXCreatePixmap },
1234    { "glXCreateWindow", (GLvoid *) glXCreateWindow },
1235    { "glXDestroyPbuffer", (GLvoid *) glXDestroyPbuffer },
1236    { "glXDestroyPixmap", (GLvoid *) glXDestroyPixmap },
1237    { "glXDestroyWindow", (GLvoid *) glXDestroyWindow },
1238    { "glXGetCurrentReadDrawable", (GLvoid *) glXGetCurrentReadDrawable },
1239    { "glXGetFBConfigAttrib", (GLvoid *) glXGetFBConfigAttrib },
1240    { "glXGetSelectedEvent", (GLvoid *) glXGetSelectedEvent },
1241    { "glXGetVisualFromFBConfig", (GLvoid *) glXGetVisualFromFBConfig },
1242    { "glXMakeContextCurrent", (GLvoid *) glXMakeContextCurrent },
1243    { "glXQueryContext", (GLvoid *) glXQueryContext },
1244    { "glXQueryDrawable", (GLvoid *) glXQueryDrawable },
1245    { "glXSelectEvent", (GLvoid *) glXSelectEvent },
1246
1247    /*** GLX_SGI_video_sync ***/
1248    { "glXGetVideoSyncSGI", (GLvoid *) glXGetVideoSyncSGI },
1249    { "glXWaitVideoSyncSGI", (GLvoid *) glXWaitVideoSyncSGI },
1250
1251    /*** GLX_MESA_copy_sub_buffer ***/
1252    { "glXCopySubBufferMESA", (GLvoid *) glXCopySubBufferMESA },
1253
1254    /*** GLX_MESA_release_buffers ***/
1255    { "glXReleaseBuffersMESA", (GLvoid *) glXReleaseBuffersMESA },
1256
1257    /*** GLX_MESA_pixmap_colormap ***/
1258    { "glXCreateGLXPixmapMESA", (GLvoid *) glXCreateGLXPixmapMESA },
1259
1260    /*** GLX_MESA_set_3dfx_mode ***/
1261    { "glXSet3DfxModeMESA", (GLvoid *) glXSet3DfxModeMESA },
1262
1263    /*** GLX_ARB_get_proc_address ***/
1264    { "glXGetProcAddressARB", (GLvoid *) glXGetProcAddressARB },
1265
1266    { NULL, NULL }   /* end of list */
1267 };
1268
1269
1270
1271 /*
1272  * Return address of named glX function, or NULL if not found.
1273  */
1274 const GLvoid *
1275 _glxapi_get_proc_address(const char *funcName)
1276 {
1277    GLuint i;
1278    for (i = 0; GLX_functions[i].Name; i++) {
1279       if (strcmp(GLX_functions[i].Name, funcName) == 0)
1280          return GLX_functions[i].Address;
1281    }
1282    return NULL;
1283 }
1284
1285
1286
1287 /*
1288  * This function does not get dispatched through the dispatch table
1289  * since it's really a "meta" function.
1290  */
1291 void (*glXGetProcAddressARB(const GLubyte *procName))()
1292 {
1293    typedef void (*gl_function)();
1294    gl_function f;
1295
1296    f = (gl_function) _glxapi_get_proc_address((const char *) procName);
1297    if (f) {
1298       return f;
1299    }
1300
1301    f = (gl_function) _glapi_get_proc_address((const char *) procName);
1302    return f;
1303 }