src/mesa/drivers/x11/glxapi.c

   1 /* $Id: glxapi.c,v 1.19 2000/12/14 17:44:08 brianp Exp $ */
   2
   3 /*
   4  * Mesa 3-D graphics library
   5  * Version:  3.5
   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 <string.h>
  38 #include "glapi.h"
  39 #include "glxapi.h"
  40
  41
  42 /*
  43  * XXX - this really shouldn't be here.
  44  * Instead, add -DUSE_MESA_GLX to the compiler flags when needed.
  45  */
  46 #define USE_MESA_GLX 1
  47
  48
  49 /* Rather than include possibly non-existant headers... */
  50 #ifdef USE_SGI_GLX
  51 extern struct _glxapi_table *_sgi_GetGLXDispatchtable(void);
  52 #endif
  53 #ifdef USE_UTAH_GLX
  54 extern struct _glxapi_table *_utah_GetGLXDispatchTable(void);
  55 #endif
  56 #ifdef USE_MESA_GLX
  57 extern struct _glxapi_table *_mesa_GetGLXDispatchTable(void);
  58 #endif
  59
  60
  61
  62 struct display_dispatch {
  63    Display *Dpy;
  64    struct _glxapi_table *Table;
  65    struct display_dispatch *Next;
  66 };
  67
  68 static struct display_dispatch *DispatchList = NULL;
  69
  70
  71 static struct _glxapi_table *
  72 get_dispatch(Display *dpy)
  73 {
  74    static Display *prevDisplay = NULL;
  75    static struct _glxapi_table *prevTable = NULL;
  76
  77    if (!dpy)
  78       return NULL;
  79
  80    /* try cached display */
  81    if (dpy == prevDisplay) {
  82       return prevTable;
  83    }
  84
  85    /* search list of display/dispatch pairs for this display */
  86    {
  87       const struct display_dispatch *d = DispatchList;
  88       while (d) {
  89          if (d->Dpy == dpy) {
  90             prevDisplay = dpy;
  91             prevTable = d->Table;
  92             return d->Table;  /* done! */
  93          }
  94          d = d->Next;
  95       }
  96    }
  97
  98    /* A new display, determine if we should use real GLX (SGI / Utah)
  99     * or Mesa's pseudo-GLX.
 100     */
 101    {
 102       struct _glxapi_table *t = NULL;
 103
 104 #if defined(USE_SGI_GLX) || defined(USE_UTAH_GLX)
 105       if (!getenv("MESA_FORCE_SOFTX")) {
 106          int ignore;
 107          if (XQueryExtension( dpy, "GLX", &ignore, &ignore, &ignore )) {
 108             /* the X server has the GLX extension */
 109 #if defined(USE_SGI_GLX)
 110             t = _sgi_GetGLXDispatchtable();
 111 #elif defined(USE_UTAH_GLX)
 112             t = _utah_GetGLXDispatchTable();
 113 #endif
 114          }
 115       }
 116 #endif
 117
 118 #if defined(USE_MESA_GLX)
 119       if (!t) {
 120          t = _mesa_GetGLXDispatchTable();
 121          assert(t);  /* this has to work */
 122       }
 123 #endif
 124
 125       if (t) {
 126          struct display_dispatch *d;
 127          d = (struct display_dispatch *) malloc(sizeof(struct display_dispatch));
 128          if (d) {
 129             d->Dpy = dpy;
 130             d->Table = t;
 131             /* insert at head of list */
 132             d->Next = DispatchList;
 133             DispatchList = d;
 134             /* update cache */
 135             prevDisplay = dpy;
 136             prevTable = t;
 137             return t;
 138          }
 139       }
 140    }
 141
 142    /* If we get here that means we can't use real GLX on this display
 143     * and the Mesa pseudo-GLX software renderer wasn't compiled in.
 144     * Or, we ran out of memory!
 145     */
 146    return NULL;
 147 }
 148
 149
 150
 151 /* Set by glXMakeCurrent() and glXMakeContextCurrent() only */
 152 static Display *CurrentDisplay = NULL;
 153 static GLXContext CurrentContext = 0;
 154 static GLXDrawable CurrentDrawable = 0;
 155 static GLXDrawable CurrentReadDrawable = 0;
 156
 157
 158
 159 /*
 160  * GLX API entrypoints
 161  */
 162
 163
 164 XVisualInfo *glXChooseVisual(Display *dpy, int screen, int *list)
 165 {
 166    struct _glxapi_table *t = get_dispatch(dpy);
 167    if (!t)
 168       return NULL;
 169    return (t->ChooseVisual)(dpy, screen, list);
 170 }
 171
 172
 173 void glXCopyContext(Display *dpy, GLXContext src, GLXContext dst, unsigned long mask)
 174 {
 175    struct _glxapi_table *t = get_dispatch(dpy);
 176    if (!t)
 177       return;
 178    (t->CopyContext)(dpy, src, dst, mask);
 179 }
 180
 181
 182 GLXContext glXCreateContext(Display *dpy, XVisualInfo *visinfo, GLXContext shareList, Bool direct)
 183 {
 184    struct _glxapi_table *t = get_dispatch(dpy);
 185    if (!t)
 186       return 0;
 187    return (t->CreateContext)(dpy, visinfo, shareList, direct);
 188 }
 189
 190
 191 GLXPixmap glXCreateGLXPixmap(Display *dpy, XVisualInfo *visinfo, Pixmap pixmap)
 192 {
 193    struct _glxapi_table *t = get_dispatch(dpy);
 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 = get_dispatch(dpy);
 203    if (!t)
 204       return;
 205    (t->DestroyContext)(dpy, ctx);
 206 }
 207
 208
 209 void glXDestroyGLXPixmap(Display *dpy, GLXPixmap pixmap)
 210 {
 211    struct _glxapi_table *t = get_dispatch(dpy);
 212    if (!t)
 213       return;
 214    (t->DestroyGLXPixmap)(dpy, pixmap);
 215 }
 216
 217
 218 int glXGetConfig(Display *dpy, XVisualInfo *visinfo, int attrib, int *value)
 219 {
 220    struct _glxapi_table *t = get_dispatch(dpy);
 221    if (!t)
 222       return GLX_NO_EXTENSION;
 223    return (t->GetConfig)(dpy, visinfo, attrib, value);
 224 }
 225
 226
 227 GLXContext glXGetCurrentContext(void)
 228 {
 229    return CurrentContext;
 230 }
 231
 232
 233 GLXDrawable glXGetCurrentDrawable(void)
 234 {
 235    return CurrentDrawable;
 236 }
 237
 238
 239 Bool glXIsDirect(Display *dpy, GLXContext ctx)
 240 {
 241    struct _glxapi_table *t = get_dispatch(dpy);
 242    if (!t)
 243       return False;
 244    return (t->IsDirect)(dpy, ctx);
 245 }
 246
 247
 248 Bool glXMakeCurrent(Display *dpy, GLXDrawable drawable, GLXContext ctx)
 249 {
 250    Bool b;
 251    struct _glxapi_table *t = get_dispatch(dpy);
 252    if (!t)
 253       return False;
 254    b = (*t->MakeCurrent)(dpy, drawable, ctx);
 255    if (b) {
 256       CurrentDisplay = dpy;
 257       CurrentContext = ctx;
 258       CurrentDrawable = drawable;
 259       CurrentReadDrawable = drawable;
 260    }
 261    return b;
 262 }
 263
 264
 265 Bool glXQueryExtension(Display *dpy, int *errorb, int *event)
 266 {
 267    struct _glxapi_table *t = get_dispatch(dpy);
 268    if (!t)
 269       return False;
 270    return (t->QueryExtension)(dpy, errorb, event);
 271 }
 272
 273
 274 Bool glXQueryVersion(Display *dpy, int *maj, int *min)
 275 {
 276    struct _glxapi_table *t = get_dispatch(dpy);
 277    if (!t)
 278       return False;
 279    return (t->QueryVersion)(dpy, maj, min);
 280 }
 281
 282
 283 void glXSwapBuffers(Display *dpy, GLXDrawable drawable)
 284 {
 285    struct _glxapi_table *t = get_dispatch(dpy);
 286    if (!t)
 287       return;
 288    (t->SwapBuffers)(dpy, drawable);
 289 }
 290
 291
 292 void glXUseXFont(Font font, int first, int count, int listBase)
 293 {
 294    struct _glxapi_table *t = get_dispatch(CurrentDisplay);
 295    if (!t)
 296       return;
 297    (t->UseXFont)(font, first, count, listBase);
 298 }
 299
 300
 301 void glXWaitGL(void)
 302 {
 303    struct _glxapi_table *t = get_dispatch(CurrentDisplay);
 304    if (!t)
 305       return;
 306    (t->WaitGL)();
 307 }
 308
 309
 310 void glXWaitX(void)
 311 {
 312    struct _glxapi_table *t = get_dispatch(CurrentDisplay);
 313    if (!t)
 314       return;
 315    (t->WaitX)();
 316 }
 317
 318
 319
 320 #ifdef GLX_VERSION_1_1
 321
 322 const char *glXGetClientString(Display *dpy, int name)
 323 {
 324    struct _glxapi_table *t = get_dispatch(dpy);
 325    if (!t)
 326       return NULL;
 327    return (t->GetClientString)(dpy, name);
 328 }
 329
 330
 331 const char *glXQueryExtensionsString(Display *dpy, int screen)
 332 {
 333    struct _glxapi_table *t = get_dispatch(dpy);
 334    if (!t)
 335       return NULL;
 336    return (t->QueryExtensionsString)(dpy, screen);
 337 }
 338
 339
 340 const char *glXQueryServerString(Display *dpy, int screen, int name)
 341 {
 342    struct _glxapi_table *t = get_dispatch(dpy);
 343    if (!t)
 344       return NULL;
 345    return (t->QueryServerString)(dpy, screen, name);
 346 }
 347
 348 #endif
 349
 350
 351
 352 #ifdef GLX_VERSION_1_2
 353 Display *glXGetCurrentDisplay(void)
 354 {
 355    return CurrentDisplay;
 356 }
 357 #endif
 358
 359
 360
 361 #ifdef GLX_VERSION_1_3
 362
 363 GLXFBConfig *glXChooseFBConfig(Display *dpy, int screen, const int *attribList, int *nitems)
 364 {
 365    struct _glxapi_table *t = get_dispatch(dpy);
 366    if (!t)
 367       return 0;
 368    return (t->ChooseFBConfig)(dpy, screen, attribList, nitems);
 369 }
 370
 371
 372 GLXContext glXCreateNewContext(Display *dpy, GLXFBConfig config, int renderType, GLXContext shareList, Bool direct)
 373 {
 374    struct _glxapi_table *t = get_dispatch(dpy);
 375    if (!t)
 376       return 0;
 377    return (t->CreateNewContext)(dpy, config, renderType, shareList, direct);
 378 }
 379
 380
 381 GLXPbuffer glXCreatePbuffer(Display *dpy, GLXFBConfig config, const int *attribList)
 382 {
 383    struct _glxapi_table *t = get_dispatch(dpy);
 384    if (!t)
 385       return 0;
 386    return (t->CreatePbuffer)(dpy, config, attribList);
 387 }
 388
 389
 390 GLXPixmap glXCreatePixmap(Display *dpy, GLXFBConfig config, Pixmap pixmap, const int *attribList)
 391 {
 392    struct _glxapi_table *t = get_dispatch(dpy);
 393    if (!t)
 394       return 0;
 395    return (t->CreatePixmap)(dpy, config, pixmap, attribList);
 396 }
 397
 398
 399 GLXWindow glXCreateWindow(Display *dpy, GLXFBConfig config, Window win, const int *attribList)
 400 {
 401    struct _glxapi_table *t = get_dispatch(dpy);
 402    if (!t)
 403       return 0;
 404    return (t->CreateWindow)(dpy, config, win, attribList);
 405 }
 406
 407
 408 void glXDestroyPbuffer(Display *dpy, GLXPbuffer pbuf)
 409 {
 410    struct _glxapi_table *t = get_dispatch(dpy);
 411    if (!t)
 412       return;
 413    (t->DestroyPbuffer)(dpy, pbuf);
 414 }
 415
 416
 417 void glXDestroyPixmap(Display *dpy, GLXPixmap pixmap)
 418 {
 419    struct _glxapi_table *t = get_dispatch(dpy);
 420    if (!t)
 421       return;
 422    (t->DestroyPixmap)(dpy, pixmap);
 423 }
 424
 425
 426 void glXDestroyWindow(Display *dpy, GLXWindow window)
 427 {
 428    struct _glxapi_table *t = get_dispatch(dpy);
 429    if (!t)
 430       return;
 431    (t->DestroyWindow)(dpy, window);
 432 }
 433
 434
 435 GLXDrawable glXGetCurrentReadDrawable(void)
 436 {
 437    return CurrentReadDrawable;
 438 }
 439
 440
 441 int glXGetFBConfigAttrib(Display *dpy, GLXFBConfig config, int attribute, int *value)
 442 {
 443    struct _glxapi_table *t = get_dispatch(dpy);
 444    if (!t)
 445       return GLX_NO_EXTENSION;
 446    return (t->GetFBConfigAttrib)(dpy, config, attribute, value);
 447 }
 448
 449
 450 GLXFBConfig *glXGetFBConfigs(Display *dpy, int screen, int *nelements)
 451 {
 452    struct _glxapi_table *t = get_dispatch(dpy);
 453    if (!t)
 454       return 0;
 455    return (t->GetFBConfigs)(dpy, screen, nelements);
 456 }
 457
 458 void glXGetSelectedEvent(Display *dpy, GLXDrawable drawable, unsigned long *mask)
 459 {
 460    struct _glxapi_table *t = get_dispatch(dpy);
 461    if (!t)
 462       return;
 463    (t->GetSelectedEvent)(dpy, drawable, mask);
 464 }
 465
 466
 467 XVisualInfo *glXGetVisualFromFBConfig(Display *dpy, GLXFBConfig config)
 468 {
 469    struct _glxapi_table *t = get_dispatch(dpy);
 470    if (!t)
 471       return NULL;
 472    return (t->GetVisualFromFBConfig)(dpy, config);
 473 }
 474
 475
 476 Bool glXMakeContextCurrent(Display *dpy, GLXDrawable draw, GLXDrawable read, GLXContext ctx)
 477 {
 478    struct _glxapi_table *t = get_dispatch(dpy);
 479    Bool b;
 480    if (!t)
 481       return False;
 482    b = (t->MakeContextCurrent)(dpy, draw, read, ctx);
 483    if (b) {
 484       CurrentDisplay = dpy;
 485       CurrentContext = ctx;
 486       CurrentDrawable = draw;
 487       CurrentReadDrawable = read;
 488    }
 489    return b;
 490 }
 491
 492
 493 int glXQueryContext(Display *dpy, GLXContext ctx, int attribute, int *value)
 494 {
 495    struct _glxapi_table *t = get_dispatch(dpy);
 496    assert(t);
 497    if (!t)
 498       return 0; /* XXX correct? */
 499    return (t->QueryContext)(dpy, ctx, attribute, value);
 500 }
 501
 502
 503 void glXQueryDrawable(Display *dpy, GLXDrawable draw, int attribute, unsigned int *value)
 504 {
 505    struct _glxapi_table *t = get_dispatch(dpy);
 506    if (!t)
 507       return;
 508    (t->QueryDrawable)(dpy, draw, attribute, value);
 509 }
 510
 511
 512 void glXSelectEvent(Display *dpy, GLXDrawable drawable, unsigned long mask)
 513 {
 514    struct _glxapi_table *t = get_dispatch(dpy);
 515    if (!t)
 516       return;
 517    (t->SelectEvent)(dpy, drawable, mask);
 518 }
 519
 520 #endif /* GLX_VERSION_1_3 */
 521
 522
 523 #ifdef GLX_EXT_import_context
 524
 525 void glXFreeContextEXT(Display *dpy, GLXContext context)
 526 {
 527    struct _glxapi_table *t = get_dispatch(dpy);
 528    if (!t)
 529       return;
 530    (t->FreeContextEXT)(dpy, context);
 531 }
 532
 533
 534 GLXContextID glXGetContextIDEXT(const GLXContext context)
 535 {
 536    /* XXX is this function right? */
 537    struct _glxapi_table *t = get_dispatch(CurrentDisplay);
 538    if (!t)
 539       return 0;
 540    return (t->GetContextIDEXT)(context);
 541 }
 542
 543
 544 Display *glXGetCurrentDisplayEXT(void)
 545 {
 546    return CurrentDisplay;
 547 }
 548
 549
 550 GLXContext glXImportContextEXT(Display *dpy, GLXContextID contextID)
 551 {
 552    struct _glxapi_table *t = get_dispatch(dpy);
 553    if (!t)
 554       return 0;
 555    return (t->ImportContextEXT)(dpy, contextID);
 556 }
 557
 558 int glXQueryContextInfoEXT(Display *dpy, GLXContext context, int attribute,int *value)
 559 {
 560    struct _glxapi_table *t = get_dispatch(dpy);
 561    if (!t)
 562       return 0;  /* XXX ok? */
 563    return (t->QueryContextInfoEXT)(dpy, context, attribute, value);
 564 }
 565
 566 #endif
 567
 568
 569 #ifdef GLX_SGI_video_sync
 570
 571 int glXGetVideoSyncSGI(unsigned int *count)
 572 {
 573    struct _glxapi_table *t = get_dispatch(CurrentDisplay);
 574    if (!t)
 575       return 0;
 576    return (t->GetVideoSyncSGI)(count);
 577 }
 578
 579
 580 int glXWaitVideoSyncSGI(int divisor, int remainder, unsigned int *count)
 581 {
 582    struct _glxapi_table *t = get_dispatch(CurrentDisplay);
 583    if (!t)
 584       return 0;
 585    return (t->WaitVideoSyncSGI)(divisor, remainder, count);
 586 }
 587
 588 #endif
 589
 590
 591 #ifdef GLX_SGIX_video_resize
 592
 593 int glXBindChannelToWindowSGIX(Display *dpy, int screen, int channel , Window window)
 594 {
 595    struct _glxapi_table *t = get_dispatch(CurrentDisplay);
 596    if (!t)
 597       return 0;
 598    return (t->BindChannelToWindowSGIX)(dpy, screen, channel, window);
 599 }
 600
 601 int glXChannelRectSGIX(Display *dpy, int screen, int channel, int x, int y, int w, int h)
 602 {
 603    struct _glxapi_table *t = get_dispatch(CurrentDisplay);
 604    if (!t)
 605       return 0;
 606    return (t->ChannelRectSGIX)(dpy, screen, channel, x, y, w, h);
 607 }
 608
 609 int glXQueryChannelRectSGIX(Display *dpy, int screen, int channel, int *x, int *y, int *w, int *h)
 610 {
 611    struct _glxapi_table *t = get_dispatch(CurrentDisplay);
 612    if (!t)
 613       return 0;
 614    return (t->QueryChannelRectSGIX)(dpy, screen, channel, x, y, w, h);
 615 }
 616
 617 int glXQueryChannelDeltasSGIX(Display *dpy, int screen, int channel, int *dx, int *dy, int *dw, int *dh)
 618 {
 619    struct _glxapi_table *t = get_dispatch(CurrentDisplay);
 620    if (!t)
 621       return 0;
 622    return (t->QueryChannelDeltasSGIX)(dpy, screen, channel, dx, dy, dw, dh);
 623 }
 624
 625 int glXChannelRectSyncSGIX(Display *dpy, int screen, int channel, GLenum synctype)
 626 {
 627    struct _glxapi_table *t = get_dispatch(CurrentDisplay);
 628    if (!t)
 629       return 0;
 630    return (t->ChannelRectSyncSGIX)(dpy, screen, channel, synctype);
 631 }
 632
 633 #endif
 634
 635
 636 #ifdef GLX_SGIX_fbconfig
 637
 638 int glXGetFBConfigAttribSGIX(Display *dpy, GLXFBConfigSGIX config, int attribute, int *value)
 639 {
 640    struct _glxapi_table *t = get_dispatch(CurrentDisplay);
 641    if (!t)
 642       return 0;
 643    return (t->GetFBConfigAttribSGIX)(dpy, config, attribute, value);
 644 }
 645
 646 GLXFBConfigSGIX * glXChooseFBConfigSGIX(Display *dpy, int screen, int *attrib_list, int *nelements)
 647 {
 648    struct _glxapi_table *t = get_dispatch(CurrentDisplay);
 649    if (!t)
 650       return 0;
 651    return (t->ChooseFBConfigSGIX)(dpy, screen, attrib_list, nelements);
 652 }
 653
 654
 655 GLXPixmap glXCreateGLXPixmapWithConfigSGIX(Display *dpy, GLXFBConfigSGIX config, Pixmap pixmap)
 656 {
 657    struct _glxapi_table *t = get_dispatch(CurrentDisplay);
 658    if (!t)
 659       return 0;
 660    return (t->CreateGLXPixmapWithConfigSGIX)(dpy, config, pixmap);
 661 }
 662
 663
 664 GLXContext glXCreateContextWithConfigSGIX(Display *dpy, GLXFBConfigSGIX config, int render_type, GLXContext share_list, Bool direct)
 665 {
 666    struct _glxapi_table *t = get_dispatch(CurrentDisplay);
 667    if (!t)
 668       return 0;
 669    return (t->CreateContextWithConfigSGIX)(dpy, config, render_type, share_list, direct);
 670 }
 671
 672 XVisualInfo * glXGetVisualFromFBConfigSGIX(Display *dpy, GLXFBConfigSGIX config)
 673 {
 674    struct _glxapi_table *t = get_dispatch(CurrentDisplay);
 675    if (!t)
 676       return 0;
 677    return (t->GetVisualFromFBConfigSGIX)(dpy, config);
 678 }
 679
 680 GLXFBConfigSGIX glXGetFBConfigFromVisualSGIX(Display *dpy, XVisualInfo *vis)
 681 {
 682    struct _glxapi_table *t = get_dispatch(CurrentDisplay);
 683    if (!t)
 684       return 0;
 685    return (t->GetFBConfigFromVisualSGIX)(dpy, vis);
 686 }
 687
 688 #endif
 689
 690
 691
 692 #ifdef GLX_MESA_copy_sub_buffer
 693
 694 void glXCopySubBufferMESA(Display *dpy, GLXDrawable drawable, int x, int y, int width, int height)
 695 {
 696    struct _glxapi_table *t = get_dispatch(dpy);
 697    if (!t)
 698       return;
 699    (t->CopySubBufferMESA)(dpy, drawable, x, y, width, height);
 700 }
 701
 702 #endif
 703
 704
 705 #ifdef GLX_MESA_release_buffers
 706
 707 Bool glXReleaseBuffersMESA(Display *dpy, Window w)
 708 {
 709    struct _glxapi_table *t = get_dispatch(dpy);
 710    if (!t)
 711       return False;
 712    return (t->ReleaseBuffersMESA)(dpy, w);
 713 }
 714
 715 #endif
 716
 717
 718 #ifdef GLX_MESA_pixmap_colormap
 719
 720 GLXPixmap glXCreateGLXPixmapMESA(Display *dpy, XVisualInfo *visinfo, Pixmap pixmap, Colormap cmap)
 721 {
 722    struct _glxapi_table *t = get_dispatch(dpy);
 723    if (!t)
 724       return 0;
 725    return (t->CreateGLXPixmapMESA)(dpy, visinfo, pixmap, cmap);
 726 }
 727
 728 #endif
 729
 730
 731 #ifdef GLX_MESA_set_3dfx_mode
 732
 733 Bool glXSet3DfxModeMESA(int mode)
 734 {
 735    struct _glxapi_table *t = get_dispatch(CurrentDisplay);
 736    if (!t)
 737       return False;
 738    return (t->Set3DfxModeMESA)(mode);
 739 }
 740
 741 #endif
 742
 743
 744
 745 /**********************************************************************/
 746 /* GLX API management functions                                       */
 747 /**********************************************************************/
 748
 749
 750 const char *
 751 _glxapi_get_version(void)
 752 {
 753    return "1.3";
 754 }
 755
 756
 757 /*
 758  * Return array of extension strings.
 759  */
 760 const char **
 761 _glxapi_get_extensions(void)
 762 {
 763    static const char *extensions[] = {
 764 #ifdef GLX_EXT_import_context
 765       "GLX_EXT_import_context",
 766 #endif
 767 #ifdef GLX_SGI_video_sync
 768       "GLX_SGI_video_sync",
 769 #endif
 770 #ifdef GLX_MESA_copy_sub_buffer
 771       "GLX_MESA_copy_sub_buffer",
 772 #endif
 773 #ifdef GLX_MESA_release_buffers
 774       "GLX_MESA_release_buffers",
 775 #endif
 776 #ifdef GLX_MESA_pixmap_colormap
 777       "GLX_MESA_pixmap_colormap",
 778 #endif
 779 #ifdef GLX_MESA_set_3dfx_mode
 780       "GLX_MESA_set_3dfx_mode",
 781 #endif
 782       NULL
 783    };
 784    return extensions;
 785 }
 786
 787
 788 /*
 789  * Return size of the GLX dispatch table, in entries, not bytes.
 790  */
 791 GLuint
 792 _glxapi_get_dispatch_table_size(void)
 793 {
 794    return sizeof(struct _glxapi_table) / sizeof(void *);
 795 }
 796
 797
 798 static int
 799 generic_no_op_func(void)
 800 {
 801    return 0;
 802 }
 803
 804
 805 /*
 806  * Initialize all functions in given dispatch table to be no-ops
 807  */
 808 void
 809 _glxapi_set_no_op_table(struct _glxapi_table *t)
 810 {
 811    GLuint n = _glxapi_get_dispatch_table_size();
 812    GLuint i;
 813    void **dispatch = (void **) t;
 814    for (i = 0; i < n; i++) {
 815       dispatch[i] = (void *) generic_no_op_func;
 816    }
 817 }
 818
 819
 820
 821 struct name_address_pair {
 822    const char *Name;
 823    GLvoid *Address;
 824 };
 825
 826 static struct name_address_pair GLX_functions[] = {
 827    { "glXChooseVisual", (GLvoid *) glXChooseVisual },
 828    { "glXCopyContext", (GLvoid *) glXCopyContext },
 829    { "glXCreateContext", (GLvoid *) glXCreateContext },
 830    { "glXCreateGLXPixmap", (GLvoid *) glXCreateGLXPixmap },
 831    { "glXDestroyContext", (GLvoid *) glXDestroyContext },
 832    { "glXDestroyGLXPixmap", (GLvoid *) glXDestroyGLXPixmap },
 833    { "glXGetConfig", (GLvoid *) glXGetConfig },
 834    { "glXGetCurrentContext", (GLvoid *) glXGetCurrentContext },
 835    { "glXGetCurrentDrawable", (GLvoid *) glXGetCurrentDrawable },
 836    { "glXIsDirect", (GLvoid *) glXIsDirect },
 837    { "glXMakeCurrent", (GLvoid *) glXMakeCurrent },
 838    { "glXQueryExtension", (GLvoid *) glXQueryExtension },
 839    { "glXQueryVersion", (GLvoid *) glXQueryVersion },
 840    { "glXSwapBuffers", (GLvoid *) glXSwapBuffers },
 841    { "glXUseXFont", (GLvoid *) glXUseXFont },
 842    { "glXWaitGL", (GLvoid *) glXWaitGL },
 843    { "glXWaitX", (GLvoid *) glXWaitX },
 844
 845 #ifdef GLX_VERSION_1_1
 846    { "glXGetClientString", (GLvoid *) glXGetClientString },
 847    { "glXQueryExtensionsString", (GLvoid *) glXQueryExtensionsString },
 848    { "glXQueryServerString", (GLvoid *) glXQueryServerString },
 849 #endif
 850
 851 #ifdef GLX_VERSION_1_2
 852    { "glXGetCurrentDisplay", (GLvoid *) glXGetCurrentDisplay },
 853 #endif
 854
 855 #ifdef GLX_VERSION_1_3
 856    { "glXChooseFBConfig", (GLvoid *) glXChooseFBConfig },
 857    { "glXCreateNewContext", (GLvoid *) glXCreateNewContext },
 858    { "glXCreatePbuffer", (GLvoid *) glXCreatePbuffer },
 859    { "glXCreatePixmap", (GLvoid *) glXCreatePixmap },
 860    { "glXCreateWindow", (GLvoid *) glXCreateWindow },
 861    { "glXDestroyPbuffer", (GLvoid *) glXDestroyPbuffer },
 862    { "glXDestroyPixmap", (GLvoid *) glXDestroyPixmap },
 863    { "glXDestroyWindow", (GLvoid *) glXDestroyWindow },
 864    { "glXGetCurrentReadDrawable", (GLvoid *) glXGetCurrentReadDrawable },
 865    { "glXGetFBConfigAttrib", (GLvoid *) glXGetFBConfigAttrib },
 866    { "glXGetSelectedEvent", (GLvoid *) glXGetSelectedEvent },
 867    { "glXGetVisualFromFBConfig", (GLvoid *) glXGetVisualFromFBConfig },
 868    { "glXMakeContextCurrent", (GLvoid *) glXMakeContextCurrent },
 869    { "glXQueryContext", (GLvoid *) glXQueryContext },
 870    { "glXQueryDrawable", (GLvoid *) glXQueryDrawable },
 871    { "glXSelectEvent", (GLvoid *) glXSelectEvent },
 872 #endif
 873
 874 #ifdef GLX_SGI_video_sync
 875    { "glXGetVideoSyncSGI", (GLvoid *) glXGetVideoSyncSGI },
 876    { "glXWaitVideoSyncSGI", (GLvoid *) glXWaitVideoSyncSGI },
 877 #endif
 878
 879 #ifdef GLX_MESA_copy_sub_buffer
 880    { "glXCopySubBufferMESA", (GLvoid *) glXCopySubBufferMESA },
 881 #endif
 882
 883 #ifdef GLX_MESA_release_buffers
 884    { "glXReleaseBuffersMESA", (GLvoid *) glXReleaseBuffersMESA },
 885 #endif
 886
 887 #ifdef GLX_MESA_pixmap_colormap
 888    { "glXCreateGLXPixmapMESA", (GLvoid *) glXCreateGLXPixmapMESA },
 889 #endif
 890
 891 #ifdef GLX_MESA_set_3dfx_mode
 892    { "glXSet3DfxModeMESA", (GLvoid *) glXSet3DfxModeMESA },
 893 #endif
 894
 895    { "glXGetProcAddressARB", (GLvoid *) glXGetProcAddressARB },
 896
 897    { NULL, NULL }   /* end of list */
 898 };
 899
 900
 901
 902 /*
 903  * Return address of named glX function, or NULL if not found.
 904  */
 905 const GLvoid *
 906 _glxapi_get_proc_address(const char *funcName)
 907 {
 908    GLuint i;
 909    for (i = 0; GLX_functions[i].Name; i++) {
 910       if (strcmp(GLX_functions[i].Name, funcName) == 0)
 911          return GLX_functions[i].Address;
 912    }
 913    return NULL;
 914 }
 915
 916
 917
 918 /*
 919  * This function does not get dispatched through the dispatch table
 920  * since it's really a "meta" function.
 921  */
 922 void (*glXGetProcAddressARB(const GLubyte *procName))()
 923 {
 924    typedef void (*gl_function)();
 925    gl_function f;
 926
 927    f = (gl_function) _glxapi_get_proc_address((const char *) procName);
 928    if (f) {
 929       return f;
 930    }
 931
 932    f = (gl_function) _glapi_get_proc_address((const char *) procName);
 933    return f;
 934 }