src/mesa/drivers/x11/glxapi.c

   1 /* $Id: glxapi.c,v 1.15 2000/02/27 18:26:54 brianp Exp $ */
   2
   3 /*
   4  * Mesa 3-D graphics library
   5  * Version:  3.3
   6  *
   7  * Copyright (C) 1999-2000  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 real (SGI / Utah) GLX encoders or to Mesa's
  31  * pseudo-GLX module.
  32  */
  33
  34
  35 #include <assert.h>
  36 #include <stdlib.h>
  37 #include "glapi.h"
  38 #include "glxapi.h"
  39
  40
  41 /*
  42  * XXX - this really shouldn't be here.
  43  * Instead, add -DUSE_MESA_GLX to the compiler flags when needed.
  44  */
  45 #define USE_MESA_GLX 1
  46
  47
  48 /* Rather than include possibly non-existant headers... */
  49 #ifdef USE_SGI_GLX
  50 extern struct _glxapi_table *_sgi_GetGLXDispatchtable(void);
  51 #endif
  52 #ifdef USE_UTAH_GLX
  53 extern struct _glxapi_table *_utah_GetGLXDispatchTable(void);
  54 #endif
  55 #ifdef USE_MESA_GLX
  56 extern struct _glxapi_table *_mesa_GetGLXDispatchTable(void);
  57 #endif
  58
  59
  60
  61 struct display_dispatch {
  62    Display *Dpy;
  63    struct _glxapi_table *Table;
  64    struct display_dispatch *Next;
  65 };
  66
  67 static struct display_dispatch *DispatchList = NULL;
  68
  69
  70 static struct _glxapi_table *
  71 get_dispatch(Display *dpy)
  72 {
  73    static Display *prevDisplay = NULL;
  74    static struct _glxapi_table *prevTable = NULL;
  75
  76    if (!dpy)
  77       return NULL;
  78
  79    /* try cached display */
  80    if (dpy == prevDisplay) {
  81       return prevTable;
  82    }
  83
  84    /* search list of display/dispatch pairs for this display */
  85    {
  86       const struct display_dispatch *d = DispatchList;
  87       while (d) {
  88          if (d->Dpy == dpy) {
  89             prevDisplay = dpy;
  90             prevTable = d->Table;
  91             return d->Table;  /* done! */
  92          }
  93          d = d->Next;
  94       }
  95    }
  96
  97    /* A new display, determine if we should use real GLX (SGI / Utah)
  98     * or Mesa's pseudo-GLX.
  99     */
 100    {
 101       struct _glxapi_table *t = NULL;
 102
 103 #if defined(USE_SGI_GLX) || defined(USE_UTAH_GLX)
 104       if (!getenv("MESA_FORCE_SOFTX")) {
 105          int ignore;
 106          if (XQueryExtension( dpy, "GLX", &ignore, &ignore, &ignore )) {
 107             /* the X server has the GLX extension */
 108 #if defined(USE_SGI_GLX)
 109             t = _sgi_GetGLXDispatchtable();
 110 #elif defined(USE_UTAH_GLX)
 111             t = _utah_GetGLXDispatchTable();
 112 #endif
 113          }
 114       }
 115 #endif
 116
 117 #if defined(USE_MESA_GLX)
 118       if (!t) {
 119          t = _mesa_GetGLXDispatchTable();
 120          assert(t);  /* this has to work */
 121       }
 122 #endif
 123
 124       if (t) {
 125          struct display_dispatch *d;
 126          d = (struct display_dispatch *) malloc(sizeof(struct display_dispatch));
 127          if (d) {
 128             d->Dpy = dpy;
 129             d->Table = t;
 130             /* insert at head of list */
 131             d->Next = DispatchList;
 132             DispatchList = d;
 133             /* update cache */
 134             prevDisplay = dpy;
 135             prevTable = t;
 136             return t;
 137          }
 138       }
 139    }
 140
 141    /* If we get here that means we can't use real GLX on this display
 142     * and the Mesa pseudo-GLX software renderer wasn't compiled in.
 143     * Or, we ran out of memory!
 144     */
 145    return NULL;
 146 }
 147
 148
 149
 150 /* Set by glXMakeCurrent() and glXMakeContextCurrent() only */
 151 static Display *CurrentDisplay = NULL;
 152 static GLXContext CurrentContext = 0;
 153 static GLXDrawable CurrentDrawable = 0;
 154 static GLXDrawable CurrentReadDrawable = 0;
 155
 156
 157
 158 /*
 159  * GLX API entrypoints
 160  */
 161
 162
 163 XVisualInfo *glXChooseVisual(Display *dpy, int screen, int *list)
 164 {
 165    struct _glxapi_table *t = get_dispatch(dpy);
 166    if (!t)
 167       return NULL;
 168    return (t->ChooseVisual)(dpy, screen, list);
 169 }
 170
 171
 172 void glXCopyContext(Display *dpy, GLXContext src, GLXContext dst, unsigned long mask)
 173 {
 174    struct _glxapi_table *t = get_dispatch(dpy);
 175    if (!t)
 176       return;
 177    (t->CopyContext)(dpy, src, dst, mask);
 178 }
 179
 180
 181 GLXContext glXCreateContext(Display *dpy, XVisualInfo *visinfo, GLXContext shareList, Bool direct)
 182 {
 183    struct _glxapi_table *t = get_dispatch(dpy);
 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 = get_dispatch(dpy);
 193    if (!t)
 194       return 0;
 195    return (t->CreateGLXPixmap)(dpy, visinfo, pixmap);
 196 }
 197
 198
 199 void glXDestroyContext(Display *dpy, GLXContext ctx)
 200 {
 201    struct _glxapi_table *t = get_dispatch(dpy);
 202    if (!t)
 203       return;
 204    (t->DestroyContext)(dpy, ctx);
 205 }
 206
 207
 208 void glXDestroyGLXPixmap(Display *dpy, GLXPixmap pixmap)
 209 {
 210    struct _glxapi_table *t = get_dispatch(dpy);
 211    if (!t)
 212       return;
 213    (t->DestroyGLXPixmap)(dpy, pixmap);
 214 }
 215
 216
 217 int glXGetConfig(Display *dpy, XVisualInfo *visinfo, int attrib, int *value)
 218 {
 219    struct _glxapi_table *t = get_dispatch(dpy);
 220    if (!t)
 221       return GLX_NO_EXTENSION;
 222    return (t->GetConfig)(dpy, visinfo, attrib, value);
 223 }
 224
 225
 226 GLXContext glXGetCurrentContext(void)
 227 {
 228    return CurrentContext;
 229 }
 230
 231
 232 GLXDrawable glXGetCurrentDrawable(void)
 233 {
 234    return CurrentDrawable;
 235 }
 236
 237
 238 Bool glXIsDirect(Display *dpy, GLXContext ctx)
 239 {
 240    struct _glxapi_table *t = get_dispatch(dpy);
 241    if (!t)
 242       return False;
 243    return (t->IsDirect)(dpy, ctx);
 244 }
 245
 246
 247 Bool glXMakeCurrent(Display *dpy, GLXDrawable drawable, GLXContext ctx)
 248 {
 249    Bool b;
 250    struct _glxapi_table *t = get_dispatch(dpy);
 251    if (!t)
 252       return False;
 253    b = (*t->MakeCurrent)(dpy, drawable, ctx);
 254    if (b) {
 255       CurrentDisplay = dpy;
 256       CurrentContext = ctx;
 257       CurrentDrawable = drawable;
 258       CurrentReadDrawable = drawable;
 259    }
 260    return b;
 261 }
 262
 263
 264 Bool glXQueryExtension(Display *dpy, int *errorb, int *event)
 265 {
 266    struct _glxapi_table *t = get_dispatch(dpy);
 267    if (!t)
 268       return False;
 269    return (t->QueryExtension)(dpy, errorb, event);
 270 }
 271
 272
 273 Bool glXQueryVersion(Display *dpy, int *maj, int *min)
 274 {
 275    struct _glxapi_table *t = get_dispatch(dpy);
 276    if (!t)
 277       return False;
 278    return (t->QueryVersion)(dpy, maj, min);
 279 }
 280
 281
 282 void glXSwapBuffers(Display *dpy, GLXDrawable drawable)
 283 {
 284    struct _glxapi_table *t = get_dispatch(dpy);
 285    if (!t)
 286       return;
 287    (t->SwapBuffers)(dpy, drawable);
 288 }
 289
 290
 291 void glXUseXFont(Font font, int first, int count, int listBase)
 292 {
 293    struct _glxapi_table *t = get_dispatch(CurrentDisplay);
 294    if (!t)
 295       return;
 296    (t->UseXFont)(font, first, count, listBase);
 297 }
 298
 299
 300 void glXWaitGL(void)
 301 {
 302    struct _glxapi_table *t = get_dispatch(CurrentDisplay);
 303    if (!t)
 304       return;
 305    (t->WaitGL)();
 306 }
 307
 308
 309 void glXWaitX(void)
 310 {
 311    struct _glxapi_table *t = get_dispatch(CurrentDisplay);
 312    if (!t)
 313       return;
 314    (t->WaitX)();
 315 }
 316
 317
 318
 319 #ifdef _GLXAPI_VERSION_1_1
 320
 321 const char *glXGetClientString(Display *dpy, int name)
 322 {
 323    struct _glxapi_table *t = get_dispatch(dpy);
 324    if (!t)
 325       return NULL;
 326    return (t->GetClientString)(dpy, name);
 327 }
 328
 329
 330 const char *glXQueryExtensionsString(Display *dpy, int screen)
 331 {
 332    struct _glxapi_table *t = get_dispatch(dpy);
 333    if (!t)
 334       return NULL;
 335    return (t->QueryExtensionsString)(dpy, screen);
 336 }
 337
 338
 339 const char *glXQueryServerString(Display *dpy, int screen, int name)
 340 {
 341    struct _glxapi_table *t = get_dispatch(dpy);
 342    if (!t)
 343       return NULL;
 344    return (t->QueryServerString)(dpy, screen, name);
 345 }
 346
 347 #endif
 348
 349
 350
 351 #ifdef _GLXAPI_VERSION_1_2
 352 Display *glXGetCurrentDisplay(void)
 353 {
 354    return CurrentDisplay;
 355 }
 356 #endif
 357
 358
 359
 360 #ifdef _GLXAPI_VERSION_1_3
 361
 362 GLXFBConfig glXChooseFBConfig(Display *dpy, int screen, const int *attribList, int *nitems)
 363 {
 364    struct _glxapi_table *t = get_dispatch(dpy);
 365    if (!t)
 366       return 0;
 367    return (t->ChooseFBConfig)(dpy, screen, attribList, nitems);
 368 }
 369
 370
 371 GLXContext glXCreateNewContext(Display *dpy, GLXFBConfig config, int renderType, GLXContext shareList, Bool direct)
 372 {
 373    struct _glxapi_table *t = get_dispatch(dpy);
 374    if (!t)
 375       return 0;
 376    return (t->CreateNewContext)(dpy, config, renderType, shareList, direct);
 377 }
 378
 379
 380 GLXPbuffer glXCreatePbuffer(Display *dpy, GLXFBConfig config, const int *attribList)
 381 {
 382    struct _glxapi_table *t = get_dispatch(dpy);
 383    if (!t)
 384       return 0;
 385    return (t->CreatePbuffer)(dpy, config, attribList);
 386 }
 387
 388
 389 GLXPixmap glXCreatePixmap(Display *dpy, GLXFBConfig config, Pixmap pixmap, const int *attribList)
 390 {
 391    struct _glxapi_table *t = get_dispatch(dpy);
 392    if (!t)
 393       return 0;
 394    return (t->CreatePixmap)(dpy, config, pixmap, attribList);
 395 }
 396
 397
 398 GLXWindow glXCreateWindow(Display *dpy, GLXFBConfig config, Window win, const int *attribList)
 399 {
 400    struct _glxapi_table *t = get_dispatch(dpy);
 401    if (!t)
 402       return 0;
 403    return (t->CreateWindow)(dpy, config, win, attribList);
 404 }
 405
 406
 407 void glXDestroyPbuffer(Display *dpy, GLXPbuffer pbuf)
 408 {
 409    struct _glxapi_table *t = get_dispatch(dpy);
 410    if (!t)
 411       return;
 412    (t->DestroyPbuffer)(dpy, pbuf);
 413 }
 414
 415
 416 void glXDestroyPixmap(Display *dpy, GLXPixmap pixmap)
 417 {
 418    struct _glxapi_table *t = get_dispatch(dpy);
 419    if (!t)
 420       return;
 421    (t->DestroyPixmap)(dpy, pixmap);
 422 }
 423
 424
 425 void glXDestroyWindow(Display *dpy, GLXWindow window)
 426 {
 427    struct _glxapi_table *t = get_dispatch(dpy);
 428    if (!t)
 429       return;
 430    (t->DestroyWindow)(dpy, window);
 431 }
 432
 433
 434 GLXDrawable glXGetCurrentReadDrawable(void)
 435 {
 436    return CurrentReadDrawable;
 437 }
 438
 439
 440 int glXGetFBConfigAttrib(Display *dpy, GLXFBConfig config, int attribute, int *value)
 441 {
 442    struct _glxapi_table *t = get_dispatch(dpy);
 443    if (!t)
 444       return GLX_NO_EXTENSION;
 445    return (t->GetFBConfigAttrib)(dpy, config, attribute, value);
 446 }
 447
 448
 449 void glXGetSelectedEvent(Display *dpy, GLXDrawable drawable, unsigned long *mask)
 450 {
 451    struct _glxapi_table *t = get_dispatch(dpy);
 452    if (!t)
 453       return;
 454    (t->GetSelectedEvent)(dpy, drawable, mask);
 455 }
 456
 457
 458 XVisualInfo *glXGetVisualFromFBConfig(Display *dpy, GLXFBConfig config)
 459 {
 460    struct _glxapi_table *t = get_dispatch(dpy);
 461    if (!t)
 462       return NULL;
 463    return (t->GetVisualFromFBConfig)(dpy, config);
 464 }
 465
 466
 467 Bool glXMakeContextCurrent(Display *dpy, GLXDrawable draw, GLXDrawable read, GLXContext ctx)
 468 {
 469    struct _glxapi_table *t = get_dispatch(dpy);
 470    Bool b;
 471    if (!t)
 472       return False;
 473    b = (t->MakeContextCurrent)(dpy, draw, read, ctx);
 474    if (b) {
 475       CurrentDisplay = dpy;
 476       CurrentContext = ctx;
 477       CurrentDrawable = draw;
 478       CurrentReadDrawable = read;
 479    }
 480    return b;
 481 }
 482
 483
 484 int glXQueryContext(Display *dpy, GLXContext ctx, int attribute, int *value)
 485 {
 486    struct _glxapi_table *t = get_dispatch(dpy);
 487    assert(t);
 488    if (!t)
 489       return 0; /* XXX correct? */
 490    return (t->QueryContext)(dpy, ctx, attribute, value);
 491 }
 492
 493
 494 void glXQueryDrawable(Display *dpy, GLXDrawable draw, int attribute, unsigned int *value)
 495 {
 496    struct _glxapi_table *t = get_dispatch(dpy);
 497    if (!t)
 498       return;
 499    (t->QueryDrawable)(dpy, draw, attribute, value);
 500 }
 501
 502
 503 void glXSelectEvent(Display *dpy, GLXDrawable drawable, unsigned long mask)
 504 {
 505    struct _glxapi_table *t = get_dispatch(dpy);
 506    if (!t)
 507       return;
 508    (t->SelectEvent)(dpy, drawable, mask);
 509 }
 510
 511 #endif /* _GLXAPI_VERSION_1_3 */
 512
 513
 514 #ifdef _GLXAPI_EXT_import_context
 515
 516 void glXFreeContextEXT(Display *dpy, GLXContext context)
 517 {
 518    struct _glxapi_table *t = get_dispatch(dpy);
 519    if (!t)
 520       return;
 521    (t->FreeContextEXT)(dpy, context);
 522 }
 523
 524
 525 GLXContextID glXGetContextIDEXT(const GLXContext context)
 526 {
 527    /* XXX is this function right? */
 528    struct _glxapi_table *t = get_dispatch(CurrentDisplay);
 529    if (!t)
 530       return 0;
 531    return (t->GetContextIDEXT)(context);
 532 }
 533
 534
 535 Display *glXGetCurrentDisplayEXT(void)
 536 {
 537    return CurrentDisplay;
 538 }
 539
 540
 541 GLXContext glXImportContextEXT(Display *dpy, GLXContextID contextID)
 542 {
 543    struct _glxapi_table *t = get_dispatch(dpy);
 544    if (!t)
 545       return 0;
 546    return (t->ImportContextEXT)(dpy, contextID);
 547 }
 548
 549 int glXQueryContextInfoEXT(Display *dpy, GLXContext context, int attribute,int *value)
 550 {
 551    struct _glxapi_table *t = get_dispatch(dpy);
 552    if (!t)
 553       return 0;  /* XXX ok? */
 554    return (t->QueryContextInfoEXT)(dpy, context, attribute, value);
 555 }
 556
 557 #endif
 558
 559
 560 #ifdef _GLXAPI_SGI_video_sync
 561
 562 int glXGetVideoSyncSGI(unsigned int *count)
 563 {
 564    struct _glxapi_table *t = get_dispatch(CurrentDisplay);
 565    if (!t)
 566       return 0;
 567    return (t->GetVideoSyncSGI)(count);
 568 }
 569
 570
 571 int glXWaitVideoSyncSGI(int divisor, int remainder, unsigned int *count)
 572 {
 573    struct _glxapi_table *t = get_dispatch(CurrentDisplay);
 574    if (!t)
 575       return 0;
 576    return (t->WaitVideoSyncSGI)(divisor, remainder, count);
 577 }
 578
 579 #endif
 580
 581
 582 #ifdef _GLXAPI_MESA_copy_sub_buffer
 583
 584 void glXCopySubBufferMESA(Display *dpy, GLXDrawable drawable, int x, int y, int width, int height)
 585 {
 586    struct _glxapi_table *t = get_dispatch(dpy);
 587    if (!t)
 588       return;
 589    (t->CopySubBufferMESA)(dpy, drawable, x, y, width, height);
 590 }
 591
 592 #endif
 593
 594
 595 #ifdef _GLXAPI_MESA_release_buffers
 596
 597 Bool glXReleaseBuffersMESA(Display *dpy, Window w)
 598 {
 599    struct _glxapi_table *t = get_dispatch(dpy);
 600    if (!t)
 601       return False;
 602    return (t->ReleaseBuffersMESA)(dpy, w);
 603 }
 604
 605 #endif
 606
 607
 608 #ifdef _GLXAPI_MESA_pixmap_colormap
 609
 610 GLXPixmap glXCreateGLXPixmapMESA(Display *dpy, XVisualInfo *visinfo, Pixmap pixmap, Colormap cmap)
 611 {
 612    struct _glxapi_table *t = get_dispatch(dpy);
 613    if (!t)
 614       return 0;
 615    return (t->CreateGLXPixmapMESA)(dpy, visinfo, pixmap, cmap);
 616 }
 617
 618 #endif
 619
 620
 621 #ifdef _GLXAPI_MESA_set_3dfx_mode
 622
 623 GLboolean glXSet3DfxModeMESA(GLint mode)
 624 {
 625    struct _glxapi_table *t = get_dispatch(CurrentDisplay);
 626    if (!t)
 627       return False;
 628    return (t->Set3DfxModeMESA)(mode);
 629 }
 630
 631 #endif
 632
 633
 634
 635 /**********************************************************************/
 636 /* GLX API management functions                                       */
 637 /**********************************************************************/
 638
 639
 640 const char *
 641 _glxapi_get_version(void)
 642 {
 643    return "1.3";
 644 }
 645
 646
 647 /*
 648  * Return array of extension strings.
 649  */
 650 const char **
 651 _glxapi_get_extensions(void)
 652 {
 653    static const char *extensions[] = {
 654 #ifdef _GLXAPI_EXT_import_context
 655       "GLX_EXT_import_context",
 656 #endif
 657 #ifdef _GLXAPI_SGI_video_sync
 658       "GLX_SGI_video_sync",
 659 #endif
 660 #ifdef _GLXAPI_MESA_copy_sub_buffer
 661       "GLX_MESA_copy_sub_buffer",
 662 #endif
 663 #ifdef _GLXAPI_MESA_release_buffers
 664       "GLX_MESA_release_buffers",
 665 #endif
 666 #ifdef _GLXAPI_MESA_pixmap_colormap
 667       "GLX_MESA_pixmap_colormap",
 668 #endif
 669 #ifdef _GLXAPI_MESA_set_3dfx_mode
 670       "GLX_MESA_set_3dfx_mode",
 671 #endif
 672       NULL
 673    };
 674    return extensions;
 675 }
 676
 677
 678 /*
 679  * Return size of the GLX dispatch table, in entries, not bytes.
 680  */
 681 GLuint
 682 _glxapi_get_dispatch_table_size(void)
 683 {
 684    return sizeof(struct _glxapi_table) / sizeof(void *);
 685 }
 686
 687
 688 static int
 689 generic_no_op_func(void)
 690 {
 691    return 0;
 692 }
 693
 694
 695 /*
 696  * Initialize all functions in given dispatch table to be no-ops
 697  */
 698 void
 699 _glxapi_set_no_op_table(struct _glxapi_table *t)
 700 {
 701    GLuint n = _glxapi_get_dispatch_table_size();
 702    GLuint i;
 703    void **dispatch = (void **) t;
 704    for (i = 0; i < n; i++) {
 705       dispatch[i] = (void *) generic_no_op_func;
 706    }
 707 }
 708
 709
 710
 711 struct name_address_pair {
 712    const char *Name;
 713    GLvoid *Address;
 714 };
 715
 716 static struct name_address_pair GLX_functions[] = {
 717    { "glXChooseVisual", (GLvoid *) glXChooseVisual },
 718    { "glXCopyContext", (GLvoid *) glXCopyContext },
 719    { "glXCreateContext", (GLvoid *) glXCreateContext },
 720    { "glXCreateGLXPixmap", (GLvoid *) glXCreateGLXPixmap },
 721    { "glXDestroyContext", (GLvoid *) glXDestroyContext },
 722    { "glXDestroyGLXPixmap", (GLvoid *) glXDestroyGLXPixmap },
 723    { "glXGetConfig", (GLvoid *) glXGetConfig },
 724    { "glXGetCurrentContext", (GLvoid *) glXGetCurrentContext },
 725    { "glXGetCurrentDrawable", (GLvoid *) glXGetCurrentDrawable },
 726    { "glXIsDirect", (GLvoid *) glXIsDirect },
 727    { "glXMakeCurrent", (GLvoid *) glXMakeCurrent },
 728    { "glXQueryExtension", (GLvoid *) glXQueryExtension },
 729    { "glXQueryVersion", (GLvoid *) glXQueryVersion },
 730    { "glXSwapBuffers", (GLvoid *) glXSwapBuffers },
 731    { "glXUseXFont", (GLvoid *) glXUseXFont },
 732    { "glXWaitGL", (GLvoid *) glXWaitGL },
 733    { "glXWaitX", (GLvoid *) glXWaitX },
 734
 735 #ifdef _GLXAPI_VERSION_1_1
 736    { "glXGetClientString", (GLvoid *) glXGetClientString },
 737    { "glXQueryExtensionsString", (GLvoid *) glXQueryExtensionsString },
 738    { "glXQueryServerString", (GLvoid *) glXQueryServerString },
 739 #endif
 740
 741 #ifdef _GLXAPI_VERSION_1_2
 742    { "glXGetCurrentDisplay", (GLvoid *) glXGetCurrentDisplay },
 743 #endif
 744
 745 #ifdef _GLXAPI_VERSION_1_3
 746    { "glXChooseFBConfig", (GLvoid *) glXChooseFBConfig },
 747    { "glXCreateNewContext", (GLvoid *) glXCreateNewContext },
 748    { "glXCreatePbuffer", (GLvoid *) glXCreatePbuffer },
 749    { "glXCreatePixmap", (GLvoid *) glXCreatePixmap },
 750    { "glXCreateWindow", (GLvoid *) glXCreateWindow },
 751    { "glXDestroyPbuffer", (GLvoid *) glXDestroyPbuffer },
 752    { "glXDestroyPixmap", (GLvoid *) glXDestroyPixmap },
 753    { "glXDestroyWindow", (GLvoid *) glXDestroyWindow },
 754    { "glXGetCurrentReadDrawable", (GLvoid *) glXGetCurrentReadDrawable },
 755    { "glXGetFBConfigAttrib", (GLvoid *) glXGetFBConfigAttrib },
 756    { "glXGetSelectedEvent", (GLvoid *) glXGetSelectedEvent },
 757    { "glXGetVisualFromFBConfig", (GLvoid *) glXGetVisualFromFBConfig },
 758    { "glXMakeContextCurrent", (GLvoid *) glXMakeContextCurrent },
 759    { "glXQueryContext", (GLvoid *) glXQueryContext },
 760    { "glXQueryDrawable", (GLvoid *) glXQueryDrawable },
 761    { "glXSelectEvent", (GLvoid *) glXSelectEvent },
 762 #endif
 763
 764 #ifdef _GLXAPI_SGI_video_sync
 765    { "glXGetVideoSyncSGI", (GLvoid *) glXGetVideoSyncSGI },
 766    { "glXWaitVideoSyncSGI", (GLvoid *) glXWaitVideoSyncSGI },
 767 #endif
 768
 769 #ifdef _GLXAPI_MESA_copy_sub_buffer
 770    { "glXCopySubBufferMESA", (GLvoid *) glXCopySubBufferMESA },
 771 #endif
 772
 773 #ifdef _GLXAPI_MESA_release_buffers
 774    { "glXReleaseBuffersMESA", (GLvoid *) glXReleaseBuffersMESA },
 775 #endif
 776
 777 #ifdef _GLXAPI_MESA_pixmap_colormap
 778    { "glXCreateGLXPixmapMESA", (GLvoid *) glXCreateGLXPixmapMESA },
 779 #endif
 780
 781 #ifdef _GLXAPI_MESA_set_3dfx_mode
 782    { "glXSet3DfxModeMESA", (GLvoid *) glXSet3DfxModeMESA },
 783 #endif
 784
 785    { "glXGetProcAddressARB", (GLvoid *) glXGetProcAddressARB },
 786
 787    { NULL, NULL }   /* end of list */
 788 };
 789
 790
 791
 792 /*
 793  * Return address of named glX function, or NULL if not found.
 794  */
 795 const GLvoid *
 796 _glxapi_get_proc_address(const char *funcName)
 797 {
 798    GLuint i;
 799    for (i = 0; GLX_functions[i].Name; i++) {
 800       if (strcmp(GLX_functions[i].Name, funcName) == 0)
 801          return GLX_functions[i].Address;
 802    }
 803    return NULL;
 804 }
 805
 806
 807
 808 /*
 809  * This function does not get dispatched through the dispatch table
 810  * since it's really a "meta" function.
 811  */
 812 void (*glXGetProcAddressARB(const GLubyte *procName))()
 813 {
 814    typedef void (*gl_function)();
 815    gl_function f;
 816
 817    f = (gl_function) _glxapi_get_proc_address((const char *) procName);
 818    if (f) {
 819       return f;
 820    }
 821
 822    f = (gl_function) _glapi_get_proc_address((const char *) procName);
 823    return f;
 824 }