src/glx/glxcmds.c

   1 /*
   2  * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
   3  * Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved.
   4  *
   5  * Permission is hereby granted, free of charge, to any person obtaining a
   6  * copy of this software and associated documentation files (the "Software"),
   7  * to deal in the Software without restriction, including without limitation
   8  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   9  * and/or sell copies of the Software, and to permit persons to whom the
  10  * Software is furnished to do so, subject to the following conditions:
  11  *
  12  * The above copyright notice including the dates of first publication and
  13  * either this permission notice or a reference to
  14  * http://oss.sgi.com/projects/FreeB/
  15  * shall be included in all copies or substantial portions of the Software.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  18  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  20  * SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
  21  * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
  22  * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  23  * SOFTWARE.
  24  *
  25  * Except as contained in this notice, the name of Silicon Graphics, Inc.
  26  * shall not be used in advertising or otherwise to promote the sale, use or
  27  * other dealings in this Software without prior written authorization from
  28  * Silicon Graphics, Inc.
  29  */
  30
  31 /**
  32  * \file glxcmds.c
  33  * Client-side GLX interface.
  34  */
  35
  36 #include "glxclient.h"
  37 #include "glapi.h"
  38 #include "glxextensions.h"
  39 #include "indirect.h"
  40 #include "glx_error.h"
  41
  42 #ifdef GLX_DIRECT_RENDERING
  43 #ifdef GLX_USE_APPLEGL
  44 #include "apple_glx_context.h"
  45 #include "apple_glx.h"
  46 #else
  47 #include <sys/time.h>
  48 #ifdef XF86VIDMODE
  49 #include <X11/extensions/xf86vmode.h>
  50 #endif
  51 #include "xf86dri.h"
  52 #endif
  53 #else
  54 #endif
  55
  56 #include <X11/Xlib-xcb.h>
  57 #include <xcb/xcb.h>
  58 #include <xcb/glx.h>
  59
  60 static const char __glXGLXClientVendorName[] = "Mesa Project and SGI";
  61 static const char __glXGLXClientVersion[] = "1.4";
  62
  63 #if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
  64
  65 /**
  66  * Get the __DRIdrawable for the drawable associated with a GLXContext
  67  *
  68  * \param dpy       The display associated with \c drawable.
  69  * \param drawable  GLXDrawable whose __DRIdrawable part is to be retrieved.
  70  * \param scrn_num  If non-NULL, the drawables screen is stored there
  71  * \returns  A pointer to the context's __DRIdrawable on success, or NULL if
  72  *           the drawable is not associated with a direct-rendering context.
  73  */
  74 _X_HIDDEN __GLXDRIdrawable *
  75 GetGLXDRIDrawable(Display * dpy, GLXDrawable drawable)
  76 {
  77    struct glx_display *priv = __glXInitialize(dpy);
  78    __GLXDRIdrawable *pdraw;
  79
  80    if (priv == NULL)
  81       return NULL;
  82
  83    if (__glxHashLookup(priv->drawHash, drawable, (void *) &pdraw) == 0)
  84       return pdraw;
  85
  86    return NULL;
  87 }
  88
  89 #endif
  90
  91 _X_HIDDEN struct glx_drawable *
  92 GetGLXDrawable(Display *dpy, GLXDrawable drawable)
  93 {
  94    struct glx_display *priv = __glXInitialize(dpy);
  95    struct glx_drawable *glxDraw;
  96
  97    if (priv == NULL)
  98       return NULL;
  99
 100    if (__glxHashLookup(priv->glXDrawHash, drawable, (void *) &glxDraw) == 0)
 101       return glxDraw;
 102
 103    return NULL;
 104 }
 105
 106 _X_HIDDEN int
 107 InitGLXDrawable(Display *dpy, struct glx_drawable *glxDraw, XID xDrawable,
 108                 GLXDrawable drawable)
 109 {
 110    struct glx_display *priv = __glXInitialize(dpy);
 111
 112    if (!priv)
 113       return -1;
 114
 115    glxDraw->xDrawable = xDrawable;
 116    glxDraw->drawable = drawable;
 117    glxDraw->lastEventSbc = 0;
 118    glxDraw->eventSbcWrap = 0;
 119
 120    return __glxHashInsert(priv->glXDrawHash, drawable, glxDraw);
 121 }
 122
 123 _X_HIDDEN void
 124 DestroyGLXDrawable(Display *dpy, GLXDrawable drawable)
 125 {
 126    struct glx_display *priv = __glXInitialize(dpy);
 127    struct glx_drawable *glxDraw;
 128
 129    if (!priv)
 130       return;
 131
 132    glxDraw = GetGLXDrawable(dpy, drawable);
 133    __glxHashDelete(priv->glXDrawHash, drawable);
 134    free(glxDraw);
 135 }
 136
 137 /**
 138  * Get the GLX per-screen data structure associated with a GLX context.
 139  *
 140  * \param dpy   Display for which the GLX per-screen information is to be
 141  *              retrieved.
 142  * \param scrn  Screen on \c dpy for which the GLX per-screen information is
 143  *              to be retrieved.
 144  * \returns A pointer to the GLX per-screen data if \c dpy and \c scrn
 145  *          specify a valid GLX screen, or NULL otherwise.
 146  *
 147  * \todo Should this function validate that \c scrn is within the screen
 148  *       number range for \c dpy?
 149  */
 150
 151 _X_HIDDEN struct glx_screen *
 152 GetGLXScreenConfigs(Display * dpy, int scrn)
 153 {
 154    struct glx_display *const priv = __glXInitialize(dpy);
 155
 156    return (priv
 157            && priv->screens !=
 158            NULL) ? priv->screens[scrn] : NULL;
 159 }
 160
 161
 162 static int
 163 GetGLXPrivScreenConfig(Display * dpy, int scrn, struct glx_display ** ppriv,
 164                        struct glx_screen ** ppsc)
 165 {
 166    /* Initialize the extension, if needed .  This has the added value
 167     * of initializing/allocating the display private
 168     */
 169
 170    if (dpy == NULL) {
 171       return GLX_NO_EXTENSION;
 172    }
 173
 174    *ppriv = __glXInitialize(dpy);
 175    if (*ppriv == NULL) {
 176       return GLX_NO_EXTENSION;
 177    }
 178
 179    /* Check screen number to see if its valid */
 180    if ((scrn < 0) || (scrn >= ScreenCount(dpy))) {
 181       return GLX_BAD_SCREEN;
 182    }
 183
 184    /* Check to see if the GL is supported on this screen */
 185    *ppsc = (*ppriv)->screens[scrn];
 186    if ((*ppsc)->configs == NULL && (*ppsc)->visuals == NULL) {
 187       /* No support for GL on this screen regardless of visual */
 188       return GLX_BAD_VISUAL;
 189    }
 190
 191    return Success;
 192 }
 193
 194
 195 /**
 196  * Determine if a \c GLXFBConfig supplied by the application is valid.
 197  *
 198  * \param dpy     Application supplied \c Display pointer.
 199  * \param config  Application supplied \c GLXFBConfig.
 200  *
 201  * \returns If the \c GLXFBConfig is valid, the a pointer to the matching
 202  *          \c struct glx_config structure is returned.  Otherwise, \c NULL
 203  *          is returned.
 204  */
 205 static struct glx_config *
 206 ValidateGLXFBConfig(Display * dpy, GLXFBConfig fbconfig)
 207 {
 208    struct glx_display *const priv = __glXInitialize(dpy);
 209    int num_screens = ScreenCount(dpy);
 210    unsigned i;
 211    struct glx_config *config;
 212
 213    if (priv != NULL) {
 214       for (i = 0; i < num_screens; i++) {
 215          for (config = priv->screens[i]->configs; config != NULL;
 216               config = config->next) {
 217             if (config == (struct glx_config *) fbconfig) {
 218                return config;
 219             }
 220          }
 221       }
 222    }
 223
 224    return NULL;
 225 }
 226
 227 /**
 228  * Verifies context's GLX_RENDER_TYPE value with config.
 229  *
 230  * \param config GLX FBConfig which will support the returned renderType.
 231  * \param renderType The context render type to be verified.
 232  * \return True if the value of context renderType was approved, or 0 if no
 233  * valid value was found.
 234  */
 235 Bool
 236 validate_renderType_against_config(const struct glx_config *config,
 237                                    int renderType)
 238 {
 239     switch (renderType) {
 240     case GLX_RGBA_TYPE:
 241         return (config->renderType & GLX_RGBA_BIT) != 0;
 242     case GLX_COLOR_INDEX_TYPE:
 243         return (config->renderType & GLX_COLOR_INDEX_BIT) != 0;
 244     case GLX_RGBA_FLOAT_TYPE_ARB:
 245         return (config->renderType & GLX_RGBA_FLOAT_BIT_ARB) != 0;
 246     case GLX_RGBA_UNSIGNED_FLOAT_TYPE_EXT:
 247         return (config->renderType & GLX_RGBA_UNSIGNED_FLOAT_BIT_EXT) != 0;
 248     default:
 249         break;
 250     }
 251     return 0;
 252 }
 253
 254 _X_HIDDEN Bool
 255 glx_context_init(struct glx_context *gc,
 256                  struct glx_screen *psc, struct glx_config *config)
 257 {
 258    gc->majorOpcode = __glXSetupForCommand(psc->display->dpy);
 259    if (!gc->majorOpcode)
 260       return False;
 261
 262    gc->screen = psc->scr;
 263    gc->psc = psc;
 264    gc->config = config;
 265    gc->isDirect = GL_TRUE;
 266    gc->currentContextTag = -1;
 267
 268    return True;
 269 }
 270
 271
 272 /**
 273  * Create a new context.
 274  *
 275  * \param renderType   For FBConfigs, what is the rendering type?
 276  */
 277
 278 static GLXContext
 279 CreateContext(Display *dpy, int generic_id, struct glx_config *config,
 280               GLXContext shareList_user, Bool allowDirect,
 281               unsigned code, int renderType, int screen)
 282 {
 283    struct glx_context *gc;
 284    struct glx_screen *psc;
 285    struct glx_context *shareList = (struct glx_context *) shareList_user;
 286    if (dpy == NULL)
 287       return NULL;
 288
 289    psc = GetGLXScreenConfigs(dpy, screen);
 290    if (psc == NULL)
 291       return NULL;
 292
 293    if (generic_id == None)
 294       return NULL;
 295
 296    gc = NULL;
 297 #ifdef GLX_USE_APPLEGL
 298    gc = applegl_create_context(psc, config, shareList, renderType);
 299 #else
 300    if (allowDirect && psc->vtable->create_context)
 301       gc = psc->vtable->create_context(psc, config, shareList, renderType);
 302    if (!gc)
 303       gc = indirect_create_context(psc, config, shareList, renderType);
 304 #endif
 305    if (!gc)
 306       return NULL;
 307
 308    LockDisplay(dpy);
 309    switch (code) {
 310    case X_GLXCreateContext: {
 311       xGLXCreateContextReq *req;
 312
 313       /* Send the glXCreateContext request */
 314       GetReq(GLXCreateContext, req);
 315       req->reqType = gc->majorOpcode;
 316       req->glxCode = X_GLXCreateContext;
 317       req->context = gc->xid = XAllocID(dpy);
 318       req->visual = generic_id;
 319       req->screen = screen;
 320       req->shareList = shareList ? shareList->xid : None;
 321       req->isDirect = gc->isDirect;
 322       break;
 323    }
 324
 325    case X_GLXCreateNewContext: {
 326       xGLXCreateNewContextReq *req;
 327
 328       /* Send the glXCreateNewContext request */
 329       GetReq(GLXCreateNewContext, req);
 330       req->reqType = gc->majorOpcode;
 331       req->glxCode = X_GLXCreateNewContext;
 332       req->context = gc->xid = XAllocID(dpy);
 333       req->fbconfig = generic_id;
 334       req->screen = screen;
 335       req->renderType = renderType;
 336       req->shareList = shareList ? shareList->xid : None;
 337       req->isDirect = gc->isDirect;
 338       break;
 339    }
 340
 341    case X_GLXvop_CreateContextWithConfigSGIX: {
 342       xGLXVendorPrivateWithReplyReq *vpreq;
 343       xGLXCreateContextWithConfigSGIXReq *req;
 344
 345       /* Send the glXCreateNewContext request */
 346       GetReqExtra(GLXVendorPrivateWithReply,
 347                   sz_xGLXCreateContextWithConfigSGIXReq -
 348                   sz_xGLXVendorPrivateWithReplyReq, vpreq);
 349       req = (xGLXCreateContextWithConfigSGIXReq *) vpreq;
 350       req->reqType = gc->majorOpcode;
 351       req->glxCode = X_GLXVendorPrivateWithReply;
 352       req->vendorCode = X_GLXvop_CreateContextWithConfigSGIX;
 353       req->context = gc->xid = XAllocID(dpy);
 354       req->fbconfig = generic_id;
 355       req->screen = screen;
 356       req->renderType = renderType;
 357       req->shareList = shareList ? shareList->xid : None;
 358       req->isDirect = gc->isDirect;
 359       break;
 360    }
 361
 362    default:
 363       /* What to do here?  This case is the sign of an internal error.  It
 364        * should never be reachable.
 365        */
 366       break;
 367    }
 368
 369    UnlockDisplay(dpy);
 370    SyncHandle();
 371
 372    gc->share_xid = shareList ? shareList->xid : None;
 373    gc->imported = GL_FALSE;
 374
 375    return (GLXContext) gc;
 376 }
 377
 378 _X_EXPORT GLXContext
 379 glXCreateContext(Display * dpy, XVisualInfo * vis,
 380                  GLXContext shareList, Bool allowDirect)
 381 {
 382    struct glx_config *config = NULL;
 383    int renderType = GLX_RGBA_TYPE;
 384
 385 #if defined(GLX_DIRECT_RENDERING) || defined(GLX_USE_APPLEGL)
 386    struct glx_screen *const psc = GetGLXScreenConfigs(dpy, vis->screen);
 387
 388    if (psc)
 389       config = glx_config_find_visual(psc->visuals, vis->visualid);
 390
 391    if (config == NULL) {
 392       xError error;
 393
 394       error.errorCode = BadValue;
 395       error.resourceID = vis->visualid;
 396       error.sequenceNumber = dpy->request;
 397       error.type = X_Error;
 398       error.majorCode = __glXSetupForCommand(dpy);
 399       error.minorCode = X_GLXCreateContext;
 400       _XError(dpy, &error);
 401       return None;
 402    }
 403
 404    /* Choose the context render type based on DRI config values.  It is
 405     * unusual to set this type from config, but we have no other choice, as
 406     * this old API does not provide renderType parameter.
 407     */
 408    if (config->renderType & GLX_RGBA_FLOAT_BIT_ARB) {
 409        renderType = GLX_RGBA_FLOAT_TYPE_ARB;
 410    } else if (config->renderType & GLX_RGBA_UNSIGNED_FLOAT_BIT_EXT) {
 411        renderType = GLX_RGBA_UNSIGNED_FLOAT_TYPE_EXT;
 412    } else if (config->renderType & GLX_RGBA_BIT) {
 413        renderType = GLX_RGBA_TYPE;
 414    } else if (config->renderType & GLX_COLOR_INDEX_BIT) {
 415        renderType = GLX_COLOR_INDEX_TYPE;
 416    } else if (config->rgbMode) {
 417        /* If we're here, then renderType is not set correctly.  Let's use a
 418         * safeguard - any TrueColor or DirectColor mode is RGB mode.  Such
 419         * default value is needed by old DRI drivers, which didn't set
 420         * renderType correctly as the value was just ignored.
 421         */
 422        renderType = GLX_RGBA_TYPE;
 423    } else {
 424        /* Safeguard - only one option left, all non-RGB modes are indexed
 425         * modes.  Again, this allows drivers with invalid renderType to work
 426         * properly.
 427         */
 428        renderType = GLX_COLOR_INDEX_TYPE;
 429    }
 430 #endif
 431
 432    return CreateContext(dpy, vis->visualid, config, shareList, allowDirect,
 433                         X_GLXCreateContext, renderType, vis->screen);
 434 }
 435
 436 static void
 437 glx_send_destroy_context(Display *dpy, XID xid)
 438 {
 439    CARD8 opcode = __glXSetupForCommand(dpy);
 440    xGLXDestroyContextReq *req;
 441
 442    LockDisplay(dpy);
 443    GetReq(GLXDestroyContext, req);
 444    req->reqType = opcode;
 445    req->glxCode = X_GLXDestroyContext;
 446    req->context = xid;
 447    UnlockDisplay(dpy);
 448    SyncHandle();
 449 }
 450
 451 /*
 452 ** Destroy the named context
 453 */
 454
 455 _X_EXPORT void
 456 glXDestroyContext(Display * dpy, GLXContext ctx)
 457 {
 458    struct glx_context *gc = (struct glx_context *) ctx;
 459
 460    if (gc == NULL || gc->xid == None)
 461       return;
 462
 463    __glXLock();
 464    if (!gc->imported)
 465       glx_send_destroy_context(dpy, gc->xid);
 466
 467    if (gc->currentDpy) {
 468       /* This context is bound to some thread.  According to the man page,
 469        * we should not actually delete the context until it's unbound.
 470        * Note that we set gc->xid = None above.  In MakeContextCurrent()
 471        * we check for that and delete the context there.
 472        */
 473       gc->xid = None;
 474    } else {
 475       gc->vtable->destroy(gc);
 476    }
 477    __glXUnlock();
 478 }
 479
 480 /*
 481 ** Return the major and minor version #s for the GLX extension
 482 */
 483 _X_EXPORT Bool
 484 glXQueryVersion(Display * dpy, int *major, int *minor)
 485 {
 486    struct glx_display *priv;
 487
 488    /* Init the extension.  This fetches the major and minor version. */
 489    priv = __glXInitialize(dpy);
 490    if (!priv)
 491       return False;
 492
 493    if (major)
 494       *major = priv->majorVersion;
 495    if (minor)
 496       *minor = priv->minorVersion;
 497    return True;
 498 }
 499
 500 /*
 501 ** Query the existance of the GLX extension
 502 */
 503 _X_EXPORT Bool
 504 glXQueryExtension(Display * dpy, int *errorBase, int *eventBase)
 505 {
 506    int major_op, erb, evb;
 507    Bool rv;
 508
 509    rv = XQueryExtension(dpy, GLX_EXTENSION_NAME, &major_op, &evb, &erb);
 510    if (rv) {
 511       if (errorBase)
 512          *errorBase = erb;
 513       if (eventBase)
 514          *eventBase = evb;
 515    }
 516    return rv;
 517 }
 518
 519 /*
 520 ** Put a barrier in the token stream that forces the GL to finish its
 521 ** work before X can proceed.
 522 */
 523 _X_EXPORT void
 524 glXWaitGL(void)
 525 {
 526    struct glx_context *gc = __glXGetCurrentContext();
 527
 528    if (gc && gc->vtable->wait_gl)
 529       gc->vtable->wait_gl(gc);
 530 }
 531
 532 /*
 533 ** Put a barrier in the token stream that forces X to finish its
 534 ** work before GL can proceed.
 535 */
 536 _X_EXPORT void
 537 glXWaitX(void)
 538 {
 539    struct glx_context *gc = __glXGetCurrentContext();
 540
 541    if (gc && gc->vtable->wait_x)
 542       gc->vtable->wait_x(gc);
 543 }
 544
 545 _X_EXPORT void
 546 glXUseXFont(Font font, int first, int count, int listBase)
 547 {
 548    struct glx_context *gc = __glXGetCurrentContext();
 549
 550    if (gc && gc->vtable->use_x_font)
 551       gc->vtable->use_x_font(gc, font, first, count, listBase);
 552 }
 553
 554 /************************************************************************/
 555
 556 /*
 557 ** Copy the source context to the destination context using the
 558 ** attribute "mask".
 559 */
 560 _X_EXPORT void
 561 glXCopyContext(Display * dpy, GLXContext source_user,
 562                GLXContext dest_user, unsigned long mask)
 563 {
 564    struct glx_context *source = (struct glx_context *) source_user;
 565    struct glx_context *dest = (struct glx_context *) dest_user;
 566 #ifdef GLX_USE_APPLEGL
 567    struct glx_context *gc = __glXGetCurrentContext();
 568    int errorcode;
 569    bool x11error;
 570
 571    if(apple_glx_copy_context(gc->driContext, source->driContext, dest->driContext,
 572                              mask, &errorcode, &x11error)) {
 573       __glXSendError(dpy, errorcode, 0, X_GLXCopyContext, x11error);
 574    }
 575
 576 #else
 577    xGLXCopyContextReq *req;
 578    struct glx_context *gc = __glXGetCurrentContext();
 579    GLXContextTag tag;
 580    CARD8 opcode;
 581
 582    opcode = __glXSetupForCommand(dpy);
 583    if (!opcode) {
 584       return;
 585    }
 586
 587 #if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
 588    if (gc->isDirect) {
 589       /* NOT_DONE: This does not work yet */
 590    }
 591 #endif
 592
 593    /*
 594     ** If the source is the current context, send its tag so that the context
 595     ** can be flushed before the copy.
 596     */
 597    if (source == gc && dpy == gc->currentDpy) {
 598       tag = gc->currentContextTag;
 599    }
 600    else {
 601       tag = 0;
 602    }
 603
 604    /* Send the glXCopyContext request */
 605    LockDisplay(dpy);
 606    GetReq(GLXCopyContext, req);
 607    req->reqType = opcode;
 608    req->glxCode = X_GLXCopyContext;
 609    req->source = source ? source->xid : None;
 610    req->dest = dest ? dest->xid : None;
 611    req->mask = mask;
 612    req->contextTag = tag;
 613    UnlockDisplay(dpy);
 614    SyncHandle();
 615 #endif /* GLX_USE_APPLEGL */
 616 }
 617
 618
 619 /**
 620  * Determine if a context uses direct rendering.
 621  *
 622  * \param dpy        Display where the context was created.
 623  * \param contextID  ID of the context to be tested.
 624  *
 625  * \returns \c True if the context is direct rendering or not.
 626  */
 627 static Bool
 628 __glXIsDirect(Display * dpy, GLXContextID contextID)
 629 {
 630    CARD8 opcode;
 631    xcb_connection_t *c;
 632    xcb_generic_error_t *err;
 633    xcb_glx_is_direct_reply_t *reply;
 634    Bool is_direct;
 635
 636    opcode = __glXSetupForCommand(dpy);
 637    if (!opcode) {
 638       return False;
 639    }
 640
 641    c = XGetXCBConnection(dpy);
 642    reply = xcb_glx_is_direct_reply(c, xcb_glx_is_direct(c, contextID), &err);
 643    is_direct = (reply != NULL && reply->is_direct) ? True : False;
 644
 645    if (err != NULL) {
 646       __glXSendErrorForXcb(dpy, err);
 647       free(err);
 648    }
 649
 650    free(reply);
 651
 652    return is_direct;
 653 }
 654
 655 /**
 656  * \todo
 657  * Shouldn't this function \b always return \c False when
 658  * \c GLX_DIRECT_RENDERING is not defined?  Do we really need to bother with
 659  * the GLX protocol here at all?
 660  */
 661 _X_EXPORT Bool
 662 glXIsDirect(Display * dpy, GLXContext gc_user)
 663 {
 664    struct glx_context *gc = (struct glx_context *) gc_user;
 665
 666    if (!gc) {
 667       return False;
 668    }
 669    else if (gc->isDirect) {
 670       return True;
 671    }
 672 #ifdef GLX_USE_APPLEGL  /* TODO: indirect on darwin */
 673    return False;
 674 #else
 675    return __glXIsDirect(dpy, gc->xid);
 676 #endif
 677 }
 678
 679 _X_EXPORT GLXPixmap
 680 glXCreateGLXPixmap(Display * dpy, XVisualInfo * vis, Pixmap pixmap)
 681 {
 682 #ifdef GLX_USE_APPLEGL
 683    int screen = vis->screen;
 684    struct glx_screen *const psc = GetGLXScreenConfigs(dpy, screen);
 685    const struct glx_config *config;
 686
 687    config = glx_config_find_visual(psc->visuals, vis->visualid);
 688
 689    if(apple_glx_pixmap_create(dpy, vis->screen, pixmap, config))
 690       return None;
 691
 692    return pixmap;
 693 #else
 694    xGLXCreateGLXPixmapReq *req;
 695    struct glx_drawable *glxDraw;
 696    GLXPixmap xid;
 697    CARD8 opcode;
 698
 699 #if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
 700    struct glx_display *const priv = __glXInitialize(dpy);
 701
 702    if (priv == NULL)
 703       return None;
 704 #endif
 705
 706    opcode = __glXSetupForCommand(dpy);
 707    if (!opcode) {
 708       return None;
 709    }
 710
 711    glxDraw = malloc(sizeof(*glxDraw));
 712    if (!glxDraw)
 713       return None;
 714
 715    /* Send the glXCreateGLXPixmap request */
 716    LockDisplay(dpy);
 717    GetReq(GLXCreateGLXPixmap, req);
 718    req->reqType = opcode;
 719    req->glxCode = X_GLXCreateGLXPixmap;
 720    req->screen = vis->screen;
 721    req->visual = vis->visualid;
 722    req->pixmap = pixmap;
 723    req->glxpixmap = xid = XAllocID(dpy);
 724    UnlockDisplay(dpy);
 725    SyncHandle();
 726
 727    if (InitGLXDrawable(dpy, glxDraw, pixmap, req->glxpixmap)) {
 728       free(glxDraw);
 729       return None;
 730    }
 731
 732 #if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
 733    do {
 734       /* FIXME: Maybe delay __DRIdrawable creation until the drawable
 735        * is actually bound to a context... */
 736
 737       __GLXDRIdrawable *pdraw;
 738       struct glx_screen *psc;
 739       struct glx_config *config;
 740
 741       psc = priv->screens[vis->screen];
 742       if (psc->driScreen == NULL)
 743          return xid;
 744
 745       config = glx_config_find_visual(psc->visuals, vis->visualid);
 746       pdraw = psc->driScreen->createDrawable(psc, pixmap, xid, config);
 747       if (pdraw == NULL) {
 748          fprintf(stderr, "failed to create pixmap\n");
 749          xid = None;
 750          break;
 751       }
 752
 753       if (__glxHashInsert(priv->drawHash, xid, pdraw)) {
 754          (*pdraw->destroyDrawable) (pdraw);
 755          xid = None;
 756          break;
 757       }
 758    } while (0);
 759
 760    if (xid == None) {
 761       xGLXDestroyGLXPixmapReq *dreq;
 762       LockDisplay(dpy);
 763       GetReq(GLXDestroyGLXPixmap, dreq);
 764       dreq->reqType = opcode;
 765       dreq->glxCode = X_GLXDestroyGLXPixmap;
 766       dreq->glxpixmap = xid;
 767       UnlockDisplay(dpy);
 768       SyncHandle();
 769    }
 770 #endif
 771
 772    return xid;
 773 #endif
 774 }
 775
 776 /*
 777 ** Destroy the named pixmap
 778 */
 779 _X_EXPORT void
 780 glXDestroyGLXPixmap(Display * dpy, GLXPixmap glxpixmap)
 781 {
 782 #ifdef GLX_USE_APPLEGL
 783    if(apple_glx_pixmap_destroy(dpy, glxpixmap))
 784       __glXSendError(dpy, GLXBadPixmap, glxpixmap, X_GLXDestroyPixmap, false);
 785 #else
 786    xGLXDestroyGLXPixmapReq *req;
 787    CARD8 opcode;
 788
 789    opcode = __glXSetupForCommand(dpy);
 790    if (!opcode) {
 791       return;
 792    }
 793
 794    /* Send the glXDestroyGLXPixmap request */
 795    LockDisplay(dpy);
 796    GetReq(GLXDestroyGLXPixmap, req);
 797    req->reqType = opcode;
 798    req->glxCode = X_GLXDestroyGLXPixmap;
 799    req->glxpixmap = glxpixmap;
 800    UnlockDisplay(dpy);
 801    SyncHandle();
 802
 803    DestroyGLXDrawable(dpy, glxpixmap);
 804
 805 #if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
 806    {
 807       struct glx_display *const priv = __glXInitialize(dpy);
 808       __GLXDRIdrawable *pdraw = GetGLXDRIDrawable(dpy, glxpixmap);
 809
 810       if (priv != NULL && pdraw != NULL) {
 811          (*pdraw->destroyDrawable) (pdraw);
 812          __glxHashDelete(priv->drawHash, glxpixmap);
 813       }
 814    }
 815 #endif
 816 #endif /* GLX_USE_APPLEGL */
 817 }
 818
 819 _X_EXPORT void
 820 glXSwapBuffers(Display * dpy, GLXDrawable drawable)
 821 {
 822 #ifdef GLX_USE_APPLEGL
 823    struct glx_context * gc = __glXGetCurrentContext();
 824    if(gc && apple_glx_is_current_drawable(dpy, gc->driContext, drawable)) {
 825       apple_glx_swap_buffers(gc->driContext);
 826    } else {
 827       __glXSendError(dpy, GLXBadCurrentWindow, 0, X_GLXSwapBuffers, false);
 828    }
 829 #else
 830    struct glx_context *gc;
 831    GLXContextTag tag;
 832    CARD8 opcode;
 833    xcb_connection_t *c;
 834
 835    gc = __glXGetCurrentContext();
 836
 837 #if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
 838    {
 839       __GLXDRIdrawable *pdraw = GetGLXDRIDrawable(dpy, drawable);
 840
 841       if (pdraw != NULL) {
 842          Bool flush = gc && drawable == gc->currentDrawable;
 843
 844          (*pdraw->psc->driScreen->swapBuffers)(pdraw, 0, 0, 0, flush);
 845          return;
 846       }
 847    }
 848 #endif
 849
 850    opcode = __glXSetupForCommand(dpy);
 851    if (!opcode) {
 852       return;
 853    }
 854
 855    /*
 856     ** The calling thread may or may not have a current context.  If it
 857     ** does, send the context tag so the server can do a flush.
 858     */
 859    if ((gc != NULL) && (dpy == gc->currentDpy) &&
 860        ((drawable == gc->currentDrawable)
 861         || (drawable == gc->currentReadable))) {
 862       tag = gc->currentContextTag;
 863    }
 864    else {
 865       tag = 0;
 866    }
 867
 868    c = XGetXCBConnection(dpy);
 869    xcb_glx_swap_buffers(c, tag, drawable);
 870    xcb_flush(c);
 871 #endif /* GLX_USE_APPLEGL */
 872 }
 873
 874
 875 /*
 876 ** Return configuration information for the given display, screen and
 877 ** visual combination.
 878 */
 879 _X_EXPORT int
 880 glXGetConfig(Display * dpy, XVisualInfo * vis, int attribute,
 881              int *value_return)
 882 {
 883    struct glx_display *priv;
 884    struct glx_screen *psc;
 885    struct glx_config *config;
 886    int status;
 887
 888    status = GetGLXPrivScreenConfig(dpy, vis->screen, &priv, &psc);
 889    if (status == Success) {
 890       config = glx_config_find_visual(psc->visuals, vis->visualid);
 891
 892       /* Lookup attribute after first finding a match on the visual */
 893       if (config != NULL) {
 894          return glx_config_get(config, attribute, value_return);
 895       }
 896
 897       status = GLX_BAD_VISUAL;
 898    }
 899
 900    /*
 901     ** If we can't find the config for this visual, this visual is not
 902     ** supported by the OpenGL implementation on the server.
 903     */
 904    if ((status == GLX_BAD_VISUAL) && (attribute == GLX_USE_GL)) {
 905       *value_return = False;
 906       status = Success;
 907    }
 908
 909    return status;
 910 }
 911
 912 /************************************************************************/
 913
 914 static void
 915 init_fbconfig_for_chooser(struct glx_config * config,
 916                           GLboolean fbconfig_style_tags)
 917 {
 918    memset(config, 0, sizeof(struct glx_config));
 919    config->visualID = (XID) GLX_DONT_CARE;
 920    config->visualType = GLX_DONT_CARE;
 921
 922    /* glXChooseFBConfig specifies different defaults for these properties than
 923     * glXChooseVisual.
 924     */
 925    if (fbconfig_style_tags) {
 926       config->rgbMode = GL_TRUE;
 927       config->doubleBufferMode = GLX_DONT_CARE;
 928       config->renderType = GLX_RGBA_BIT;
 929    }
 930
 931    config->drawableType = GLX_WINDOW_BIT;
 932    config->visualRating = GLX_DONT_CARE;
 933    config->transparentPixel = GLX_NONE;
 934    config->transparentRed = GLX_DONT_CARE;
 935    config->transparentGreen = GLX_DONT_CARE;
 936    config->transparentBlue = GLX_DONT_CARE;
 937    config->transparentAlpha = GLX_DONT_CARE;
 938    config->transparentIndex = GLX_DONT_CARE;
 939
 940    config->xRenderable = GLX_DONT_CARE;
 941    config->fbconfigID = (GLXFBConfigID) (GLX_DONT_CARE);
 942
 943    config->swapMethod = GLX_DONT_CARE;
 944 }
 945
 946 #define MATCH_DONT_CARE( param )        \
 947   do {                                  \
 948     if ( ((int) a-> param != (int) GLX_DONT_CARE)   \
 949          && (a-> param != b-> param) ) {        \
 950       return False;                             \
 951     }                                           \
 952   } while ( 0 )
 953
 954 #define MATCH_MINIMUM( param )                  \
 955   do {                                          \
 956     if ( ((int) a-> param != (int) GLX_DONT_CARE)       \
 957          && (a-> param > b-> param) ) {         \
 958       return False;                             \
 959     }                                           \
 960   } while ( 0 )
 961
 962 #define MATCH_EXACT( param )                    \
 963   do {                                          \
 964     if ( a-> param != b-> param) {              \
 965       return False;                             \
 966     }                                           \
 967   } while ( 0 )
 968
 969 /* Test that all bits from a are contained in b */
 970 #define MATCH_MASK(param)                       \
 971   do {                                          \
 972     if ( ((int) a-> param != (int) GLX_DONT_CARE)       \
 973          && ((a->param & ~b->param) != 0) ) {   \
 974       return False;                             \
 975     }                                           \
 976   } while (0);
 977
 978 /**
 979  * Determine if two GLXFBConfigs are compatible.
 980  *
 981  * \param a  Application specified config to test.
 982  * \param b  Server specified config to test against \c a.
 983  */
 984 static Bool
 985 fbconfigs_compatible(const struct glx_config * const a,
 986                      const struct glx_config * const b)
 987 {
 988    MATCH_DONT_CARE(doubleBufferMode);
 989    MATCH_DONT_CARE(visualType);
 990    MATCH_DONT_CARE(visualRating);
 991    MATCH_DONT_CARE(xRenderable);
 992    MATCH_DONT_CARE(fbconfigID);
 993    MATCH_DONT_CARE(swapMethod);
 994
 995    MATCH_MINIMUM(rgbBits);
 996    MATCH_MINIMUM(numAuxBuffers);
 997    MATCH_MINIMUM(redBits);
 998    MATCH_MINIMUM(greenBits);
 999    MATCH_MINIMUM(blueBits);
1000    MATCH_MINIMUM(alphaBits);
1001    MATCH_MINIMUM(depthBits);
1002    MATCH_MINIMUM(stencilBits);
1003    MATCH_MINIMUM(accumRedBits);
1004    MATCH_MINIMUM(accumGreenBits);
1005    MATCH_MINIMUM(accumBlueBits);
1006    MATCH_MINIMUM(accumAlphaBits);
1007    MATCH_MINIMUM(sampleBuffers);
1008    MATCH_MINIMUM(maxPbufferWidth);
1009    MATCH_MINIMUM(maxPbufferHeight);
1010    MATCH_MINIMUM(maxPbufferPixels);
1011    MATCH_MINIMUM(samples);
1012
1013    MATCH_DONT_CARE(stereoMode);
1014    MATCH_EXACT(level);
1015
1016    MATCH_MASK(drawableType);
1017    MATCH_MASK(renderType);
1018
1019    /* There is a bug in a few of the XFree86 DDX drivers.  They contain
1020     * visuals with a "transparent type" of 0 when they really mean GLX_NONE.
1021     * Technically speaking, it is a bug in the DDX driver, but there is
1022     * enough of an installed base to work around the problem here.  In any
1023     * case, 0 is not a valid value of the transparent type, so we'll treat 0
1024     * from the app as GLX_DONT_CARE. We'll consider GLX_NONE from the app and
1025     * 0 from the server to be a match to maintain backward compatibility with
1026     * the (broken) drivers.
1027     */
1028
1029    if (a->transparentPixel != (int) GLX_DONT_CARE && a->transparentPixel != 0) {
1030       if (a->transparentPixel == GLX_NONE) {
1031          if (b->transparentPixel != GLX_NONE && b->transparentPixel != 0)
1032             return False;
1033       }
1034       else {
1035          MATCH_EXACT(transparentPixel);
1036       }
1037
1038       switch (a->transparentPixel) {
1039       case GLX_TRANSPARENT_RGB:
1040          MATCH_DONT_CARE(transparentRed);
1041          MATCH_DONT_CARE(transparentGreen);
1042          MATCH_DONT_CARE(transparentBlue);
1043          MATCH_DONT_CARE(transparentAlpha);
1044          break;
1045
1046       case GLX_TRANSPARENT_INDEX:
1047          MATCH_DONT_CARE(transparentIndex);
1048          break;
1049
1050       default:
1051          break;
1052       }
1053    }
1054
1055    return True;
1056 }
1057
1058
1059 /* There's some trickly language in the GLX spec about how this is supposed
1060  * to work.  Basically, if a given component size is either not specified
1061  * or the requested size is zero, it is supposed to act like PERFER_SMALLER.
1062  * Well, that's really hard to do with the code as-is.  This behavior is
1063  * closer to correct, but still not technically right.
1064  */
1065 #define PREFER_LARGER_OR_ZERO(comp)             \
1066   do {                                          \
1067     if ( ((*a)-> comp) != ((*b)-> comp) ) {     \
1068       if ( ((*a)-> comp) == 0 ) {               \
1069         return -1;                              \
1070       }                                         \
1071       else if ( ((*b)-> comp) == 0 ) {          \
1072         return 1;                               \
1073       }                                         \
1074       else {                                    \
1075         return ((*b)-> comp) - ((*a)-> comp) ;  \
1076       }                                         \
1077     }                                           \
1078   } while( 0 )
1079
1080 #define PREFER_LARGER(comp)                     \
1081   do {                                          \
1082     if ( ((*a)-> comp) != ((*b)-> comp) ) {     \
1083       return ((*b)-> comp) - ((*a)-> comp) ;    \
1084     }                                           \
1085   } while( 0 )
1086
1087 #define PREFER_SMALLER(comp)                    \
1088   do {                                          \
1089     if ( ((*a)-> comp) != ((*b)-> comp) ) {     \
1090       return ((*a)-> comp) - ((*b)-> comp) ;    \
1091     }                                           \
1092   } while( 0 )
1093
1094 /**
1095  * Compare two GLXFBConfigs.  This function is intended to be used as the
1096  * compare function passed in to qsort.
1097  *
1098  * \returns If \c a is a "better" config, according to the specification of
1099  *          SGIX_fbconfig, a number less than zero is returned.  If \c b is
1100  *          better, then a number greater than zero is return.  If both are
1101  *          equal, zero is returned.
1102  * \sa qsort, glXChooseVisual, glXChooseFBConfig, glXChooseFBConfigSGIX
1103  */
1104 static int
1105 fbconfig_compare(struct glx_config **a, struct glx_config **b)
1106 {
1107    /* The order of these comparisons must NOT change.  It is defined by
1108     * the GLX 1.4 specification.
1109     */
1110
1111    PREFER_SMALLER(visualSelectGroup);
1112
1113    /* The sort order for the visualRating is GLX_NONE, GLX_SLOW, and
1114     * GLX_NON_CONFORMANT_CONFIG.  It just so happens that this is the
1115     * numerical sort order of the enums (0x8000, 0x8001, and 0x800D).
1116     */
1117    PREFER_SMALLER(visualRating);
1118
1119    /* This isn't quite right.  It is supposed to compare the sum of the
1120     * components the user specifically set minimums for.
1121     */
1122    PREFER_LARGER_OR_ZERO(redBits);
1123    PREFER_LARGER_OR_ZERO(greenBits);
1124    PREFER_LARGER_OR_ZERO(blueBits);
1125    PREFER_LARGER_OR_ZERO(alphaBits);
1126
1127    PREFER_SMALLER(rgbBits);
1128
1129    if (((*a)->doubleBufferMode != (*b)->doubleBufferMode)) {
1130       /* Prefer single-buffer.
1131        */
1132       return (!(*a)->doubleBufferMode) ? -1 : 1;
1133    }
1134
1135    PREFER_SMALLER(numAuxBuffers);
1136
1137    PREFER_SMALLER(sampleBuffers);
1138    PREFER_SMALLER(samples);
1139
1140    PREFER_LARGER_OR_ZERO(depthBits);
1141    PREFER_SMALLER(stencilBits);
1142
1143    /* This isn't quite right.  It is supposed to compare the sum of the
1144     * components the user specifically set minimums for.
1145     */
1146    PREFER_LARGER_OR_ZERO(accumRedBits);
1147    PREFER_LARGER_OR_ZERO(accumGreenBits);
1148    PREFER_LARGER_OR_ZERO(accumBlueBits);
1149    PREFER_LARGER_OR_ZERO(accumAlphaBits);
1150
1151    PREFER_SMALLER(visualType);
1152
1153    /* None of the pbuffer or fbconfig specs say that this comparison needs
1154     * to happen at all, but it seems like it should.
1155     */
1156    PREFER_LARGER(maxPbufferWidth);
1157    PREFER_LARGER(maxPbufferHeight);
1158    PREFER_LARGER(maxPbufferPixels);
1159
1160    return 0;
1161 }
1162
1163
1164 /**
1165  * Selects and sorts a subset of the supplied configs based on the attributes.
1166  * This function forms to basis of \c glXChooseVisual, \c glXChooseFBConfig,
1167  * and \c glXChooseFBConfigSGIX.
1168  *
1169  * \param configs   Array of pointers to possible configs.  The elements of
1170  *                  this array that do not meet the criteria will be set to
1171  *                  NULL.  The remaining elements will be sorted according to
1172  *                  the various visual / FBConfig selection rules.
1173  * \param num_configs  Number of elements in the \c configs array.
1174  * \param attribList   Attributes used select from \c configs.  This array is
1175  *                     terminated by a \c None tag.  The array can either take
1176  *                     the form expected by \c glXChooseVisual (where boolean
1177  *                     tags do not have a value) or by \c glXChooseFBConfig
1178  *                     (where every tag has a value).
1179  * \param fbconfig_style_tags  Selects whether \c attribList is in
1180  *                             \c glXChooseVisual style or
1181  *                             \c glXChooseFBConfig style.
1182  * \returns The number of valid elements left in \c configs.
1183  *
1184  * \sa glXChooseVisual, glXChooseFBConfig, glXChooseFBConfigSGIX
1185  */
1186 static int
1187 choose_visual(struct glx_config ** configs, int num_configs,
1188               const int *attribList, GLboolean fbconfig_style_tags)
1189 {
1190    struct glx_config test_config;
1191    int base;
1192    int i;
1193
1194    /* This is a fairly direct implementation of the selection method
1195     * described by GLX_SGIX_fbconfig.  Start by culling out all the
1196     * configs that are not compatible with the selected parameter
1197     * list.
1198     */
1199
1200    init_fbconfig_for_chooser(&test_config, fbconfig_style_tags);
1201    __glXInitializeVisualConfigFromTags(&test_config, 512,
1202                                        (const INT32 *) attribList,
1203                                        GL_TRUE, fbconfig_style_tags);
1204
1205    base = 0;
1206    for (i = 0; i < num_configs; i++) {
1207       if (fbconfigs_compatible(&test_config, configs[i])) {
1208          configs[base] = configs[i];
1209          base++;
1210       }
1211    }
1212
1213    if (base == 0) {
1214       return 0;
1215    }
1216
1217    if (base < num_configs) {
1218       (void) memset(&configs[base], 0, sizeof(void *) * (num_configs - base));
1219    }
1220
1221    /* After the incompatible configs are removed, the resulting
1222     * list is sorted according to the rules set out in the various
1223     * specifications.
1224     */
1225
1226    qsort(configs, base, sizeof(struct glx_config *),
1227          (int (*)(const void *, const void *)) fbconfig_compare);
1228    return base;
1229 }
1230
1231
1232
1233
1234 /*
1235 ** Return the visual that best matches the template.  Return None if no
1236 ** visual matches the template.
1237 */
1238 _X_EXPORT XVisualInfo *
1239 glXChooseVisual(Display * dpy, int screen, int *attribList)
1240 {
1241    XVisualInfo *visualList = NULL;
1242    struct glx_display *priv;
1243    struct glx_screen *psc;
1244    struct glx_config test_config;
1245    struct glx_config *config;
1246    struct glx_config *best_config = NULL;
1247
1248    /*
1249     ** Get a list of all visuals, return if list is empty
1250     */
1251    if (GetGLXPrivScreenConfig(dpy, screen, &priv, &psc) != Success) {
1252       return None;
1253    }
1254
1255
1256    /*
1257     ** Build a template from the defaults and the attribute list
1258     ** Free visual list and return if an unexpected token is encountered
1259     */
1260    init_fbconfig_for_chooser(&test_config, GL_FALSE);
1261    __glXInitializeVisualConfigFromTags(&test_config, 512,
1262                                        (const INT32 *) attribList,
1263                                        GL_TRUE, GL_FALSE);
1264
1265    /*
1266     ** Eliminate visuals that don't meet minimum requirements
1267     ** Compute a score for those that do
1268     ** Remember which visual, if any, got the highest score
1269     ** If no visual is acceptable, return None
1270     ** Otherwise, create an XVisualInfo list with just the selected X visual
1271     ** and return this.
1272     */
1273    for (config = psc->visuals; config != NULL; config = config->next) {
1274       if (fbconfigs_compatible(&test_config, config)
1275           && ((best_config == NULL) ||
1276               (fbconfig_compare (&config, &best_config) < 0))) {
1277          XVisualInfo visualTemplate;
1278          XVisualInfo *newList;
1279          int i;
1280
1281          visualTemplate.screen = screen;
1282          visualTemplate.visualid = config->visualID;
1283          newList = XGetVisualInfo(dpy, VisualScreenMask | VisualIDMask,
1284                                   &visualTemplate, &i);
1285
1286          if (newList) {
1287             free(visualList);
1288             visualList = newList;
1289             best_config = config;
1290          }
1291       }
1292    }
1293
1294 #ifdef GLX_USE_APPLEGL
1295    if(visualList && getenv("LIBGL_DUMP_VISUALID")) {
1296       printf("visualid 0x%lx\n", visualList[0].visualid);
1297    }
1298 #endif
1299
1300    return visualList;
1301 }
1302
1303
1304 _X_EXPORT const char *
1305 glXQueryExtensionsString(Display * dpy, int screen)
1306 {
1307    struct glx_screen *psc;
1308    struct glx_display *priv;
1309
1310    if (GetGLXPrivScreenConfig(dpy, screen, &priv, &psc) != Success) {
1311       return NULL;
1312    }
1313
1314    if (!psc->effectiveGLXexts) {
1315       if (!psc->serverGLXexts) {
1316          psc->serverGLXexts =
1317             __glXQueryServerString(dpy, priv->majorOpcode, screen,
1318                                    GLX_EXTENSIONS);
1319       }
1320
1321       __glXCalculateUsableExtensions(psc,
1322 #if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
1323                                      (psc->driScreen != NULL),
1324 #else
1325                                      GL_FALSE,
1326 #endif
1327                                      priv->minorVersion);
1328    }
1329
1330    return psc->effectiveGLXexts;
1331 }
1332
1333 _X_EXPORT const char *
1334 glXGetClientString(Display * dpy, int name)
1335 {
1336    (void) dpy;
1337
1338    switch (name) {
1339    case GLX_VENDOR:
1340       return (__glXGLXClientVendorName);
1341    case GLX_VERSION:
1342       return (__glXGLXClientVersion);
1343    case GLX_EXTENSIONS:
1344       return (__glXGetClientExtensions());
1345    default:
1346       return NULL;
1347    }
1348 }
1349
1350 _X_EXPORT const char *
1351 glXQueryServerString(Display * dpy, int screen, int name)
1352 {
1353    struct glx_screen *psc;
1354    struct glx_display *priv;
1355    const char **str;
1356
1357
1358    if (GetGLXPrivScreenConfig(dpy, screen, &priv, &psc) != Success) {
1359       return NULL;
1360    }
1361
1362    switch (name) {
1363    case GLX_VENDOR:
1364       str = &priv->serverGLXvendor;
1365       break;
1366    case GLX_VERSION:
1367       str = &priv->serverGLXversion;
1368       break;
1369    case GLX_EXTENSIONS:
1370       str = &psc->serverGLXexts;
1371       break;
1372    default:
1373       return NULL;
1374    }
1375
1376    if (*str == NULL) {
1377       *str = __glXQueryServerString(dpy, priv->majorOpcode, screen, name);
1378    }
1379
1380    return *str;
1381 }
1382
1383 void
1384 __glXClientInfo(Display * dpy, int opcode)
1385 {
1386    char *ext_str = __glXGetClientGLExtensionString();
1387    int size = strlen(ext_str) + 1;
1388
1389    xcb_connection_t *c = XGetXCBConnection(dpy);
1390    xcb_glx_client_info(c,
1391                        GLX_MAJOR_VERSION, GLX_MINOR_VERSION, size, ext_str);
1392
1393    free(ext_str);
1394 }
1395
1396
1397 /*
1398 ** EXT_import_context
1399 */
1400
1401 _X_EXPORT Display *
1402 glXGetCurrentDisplay(void)
1403 {
1404    struct glx_context *gc = __glXGetCurrentContext();
1405    if (NULL == gc)
1406       return NULL;
1407    return gc->currentDpy;
1408 }
1409
1410 _X_EXPORT
1411 GLX_ALIAS(Display *, glXGetCurrentDisplayEXT, (void), (),
1412           glXGetCurrentDisplay)
1413
1414 #ifndef GLX_USE_APPLEGL
1415 _X_EXPORT GLXContext
1416 glXImportContextEXT(Display *dpy, GLXContextID contextID)
1417 {
1418    struct glx_display *priv = __glXInitialize(dpy);
1419    struct glx_screen *psc = NULL;
1420    xGLXQueryContextReply reply;
1421    CARD8 opcode;
1422    struct glx_context *ctx;
1423
1424    /* This GLX implementation knows about 5 different properties, so
1425     * allow the server to send us one of each.
1426     */
1427    int propList[5 * 2], *pProp, nPropListBytes;
1428    int numProps;
1429    int i, renderType;
1430    XID share;
1431    struct glx_config *mode;
1432    uint32_t fbconfigID = 0;
1433    uint32_t visualID = 0;
1434    uint32_t screen = 0;
1435    Bool got_screen = False;
1436
1437    if (priv == NULL)
1438       return NULL;
1439
1440    /* The GLX_EXT_import_context spec says:
1441     *
1442     *     "If <contextID> does not refer to a valid context, then a BadContext
1443     *     error is generated; if <contextID> refers to direct rendering
1444     *     context then no error is generated but glXImportContextEXT returns
1445     *     NULL."
1446     *
1447     * If contextID is None, generate BadContext on the client-side.  Other
1448     * sorts of invalid contexts will be detected by the server in the
1449     * __glXIsDirect call.
1450     */
1451    if (contextID == None) {
1452       __glXSendError(dpy, GLXBadContext, contextID, X_GLXIsDirect, false);
1453       return NULL;
1454    }
1455
1456    if (__glXIsDirect(dpy, contextID))
1457       return NULL;
1458
1459    opcode = __glXSetupForCommand(dpy);
1460    if (!opcode)
1461       return 0;
1462
1463    /* Send the glXQueryContextInfoEXT request */
1464    LockDisplay(dpy);
1465
1466    if (priv->majorVersion > 1 || priv->minorVersion >= 3) {
1467       xGLXQueryContextReq *req;
1468
1469       GetReq(GLXQueryContext, req);
1470
1471       req->reqType = opcode;
1472       req->glxCode = X_GLXQueryContext;
1473       req->context = contextID;
1474    }
1475    else {
1476       xGLXVendorPrivateReq *vpreq;
1477       xGLXQueryContextInfoEXTReq *req;
1478
1479       GetReqExtra(GLXVendorPrivate,
1480                   sz_xGLXQueryContextInfoEXTReq - sz_xGLXVendorPrivateReq,
1481                   vpreq);
1482       req = (xGLXQueryContextInfoEXTReq *) vpreq;
1483       req->reqType = opcode;
1484       req->glxCode = X_GLXVendorPrivateWithReply;
1485       req->vendorCode = X_GLXvop_QueryContextInfoEXT;
1486       req->context = contextID;
1487    }
1488
1489    _XReply(dpy, (xReply *) & reply, 0, False);
1490
1491    if (reply.n <= __GLX_MAX_CONTEXT_PROPS)
1492       nPropListBytes = reply.n * 2 * sizeof propList[0];
1493    else
1494       nPropListBytes = 0;
1495    _XRead(dpy, (char *) propList, nPropListBytes);
1496    UnlockDisplay(dpy);
1497    SyncHandle();
1498
1499    numProps = nPropListBytes / (2 * sizeof(propList[0]));
1500    share = None;
1501    mode = NULL;
1502    renderType = GLX_RGBA_TYPE; /* By default, assume RGBA context */
1503    pProp = propList;
1504
1505    for (i = 0, pProp = propList; i < numProps; i++, pProp += 2)
1506       switch (pProp[0]) {
1507       case GLX_SCREEN:
1508          screen = pProp[1];
1509          got_screen = True;
1510          break;
1511       case GLX_SHARE_CONTEXT_EXT:
1512          share = pProp[1];
1513          break;
1514       case GLX_VISUAL_ID_EXT:
1515          visualID = pProp[1];
1516          break;
1517       case GLX_FBCONFIG_ID:
1518          fbconfigID = pProp[1];
1519          break;
1520       case GLX_RENDER_TYPE:
1521          renderType = pProp[1];
1522          break;
1523       }
1524
1525    if (!got_screen)
1526       return NULL;
1527
1528    psc = GetGLXScreenConfigs(dpy, screen);
1529    if (psc == NULL)
1530       return NULL;
1531
1532    if (fbconfigID != 0) {
1533       mode = glx_config_find_fbconfig(psc->configs, fbconfigID);
1534    } else if (visualID != 0) {
1535       mode = glx_config_find_visual(psc->visuals, visualID);
1536    }
1537
1538    if (mode == NULL)
1539       return NULL;
1540
1541    ctx = indirect_create_context(psc, mode, NULL, renderType);
1542    if (ctx == NULL)
1543       return NULL;
1544
1545    ctx->xid = contextID;
1546    ctx->imported = GL_TRUE;
1547    ctx->share_xid = share;
1548
1549    return (GLXContext) ctx;
1550 }
1551
1552 #endif
1553
1554 _X_EXPORT int
1555 glXQueryContext(Display * dpy, GLXContext ctx_user, int attribute, int *value)
1556 {
1557    struct glx_context *ctx = (struct glx_context *) ctx_user;
1558
1559    switch (attribute) {
1560       case GLX_SHARE_CONTEXT_EXT:
1561       *value = ctx->share_xid;
1562       break;
1563    case GLX_VISUAL_ID_EXT:
1564       *value = ctx->config ? ctx->config->visualID : None;
1565       break;
1566    case GLX_SCREEN:
1567       *value = ctx->screen;
1568       break;
1569    case GLX_FBCONFIG_ID:
1570       *value = ctx->config ? ctx->config->fbconfigID : None;
1571       break;
1572    case GLX_RENDER_TYPE:
1573       *value = ctx->renderType;
1574       break;
1575    default:
1576       return GLX_BAD_ATTRIBUTE;
1577    }
1578    return Success;
1579 }
1580
1581 _X_EXPORT
1582 GLX_ALIAS(int, glXQueryContextInfoEXT,
1583           (Display * dpy, GLXContext ctx, int attribute, int *value),
1584           (dpy, ctx, attribute, value), glXQueryContext)
1585
1586 _X_EXPORT GLXContextID glXGetContextIDEXT(const GLXContext ctx_user)
1587 {
1588    struct glx_context *ctx = (struct glx_context *) ctx_user;
1589
1590    return (ctx == NULL) ? None : ctx->xid;
1591 }
1592
1593 _X_EXPORT void
1594 glXFreeContextEXT(Display *dpy, GLXContext ctx)
1595 {
1596    struct glx_context *gc = (struct glx_context *) ctx;
1597
1598    if (gc == NULL || gc->xid == None)
1599       return;
1600
1601    /* The GLX_EXT_import_context spec says:
1602     *
1603     *     "glXFreeContext does not free the server-side context information or
1604     *     the XID associated with the server-side context."
1605     *
1606     * Don't send any protocol.  Just destroy the client-side tracking of the
1607     * context.  Also, only release the context structure if it's not current.
1608     */
1609    __glXLock();
1610    if (gc->currentDpy) {
1611       gc->xid = None;
1612    } else {
1613       gc->vtable->destroy(gc);
1614    }
1615    __glXUnlock();
1616 }
1617
1618 _X_EXPORT GLXFBConfig *
1619 glXChooseFBConfig(Display * dpy, int screen,
1620                   const int *attribList, int *nitems)
1621 {
1622    struct glx_config **config_list;
1623    int list_size;
1624
1625
1626    config_list = (struct glx_config **)
1627       glXGetFBConfigs(dpy, screen, &list_size);
1628
1629    if ((config_list != NULL) && (list_size > 0) && (attribList != NULL)) {
1630       list_size = choose_visual(config_list, list_size, attribList, GL_TRUE);
1631       if (list_size == 0) {
1632          free(config_list);
1633          config_list = NULL;
1634       }
1635    }
1636
1637    *nitems = list_size;
1638    return (GLXFBConfig *) config_list;
1639 }
1640
1641
1642 _X_EXPORT GLXContext
1643 glXCreateNewContext(Display * dpy, GLXFBConfig fbconfig,
1644                     int renderType, GLXContext shareList, Bool allowDirect)
1645 {
1646    struct glx_config *config = (struct glx_config *) fbconfig;
1647
1648    return CreateContext(dpy, config->fbconfigID, config, shareList,
1649                         allowDirect, X_GLXCreateNewContext, renderType,
1650                         config->screen);
1651 }
1652
1653
1654 _X_EXPORT GLXDrawable
1655 glXGetCurrentReadDrawable(void)
1656 {
1657    struct glx_context *gc = __glXGetCurrentContext();
1658
1659    return gc->currentReadable;
1660 }
1661
1662
1663 _X_EXPORT GLXFBConfig *
1664 glXGetFBConfigs(Display * dpy, int screen, int *nelements)
1665 {
1666    struct glx_display *priv = __glXInitialize(dpy);
1667    struct glx_config **config_list = NULL;
1668    struct glx_config *config;
1669    unsigned num_configs = 0;
1670    int i;
1671
1672    *nelements = 0;
1673    if (priv && (priv->screens != NULL)
1674        && (screen >= 0) && (screen <= ScreenCount(dpy))
1675        && (priv->screens[screen]->configs != NULL)
1676        && (priv->screens[screen]->configs->fbconfigID
1677            != (int) GLX_DONT_CARE)) {
1678
1679       for (config = priv->screens[screen]->configs; config != NULL;
1680            config = config->next) {
1681          if (config->fbconfigID != (int) GLX_DONT_CARE) {
1682             num_configs++;
1683          }
1684       }
1685
1686       config_list = malloc(num_configs * sizeof *config_list);
1687       if (config_list != NULL) {
1688          *nelements = num_configs;
1689          i = 0;
1690          for (config = priv->screens[screen]->configs; config != NULL;
1691               config = config->next) {
1692             if (config->fbconfigID != (int) GLX_DONT_CARE) {
1693                config_list[i] = config;
1694                i++;
1695             }
1696          }
1697       }
1698    }
1699
1700    return (GLXFBConfig *) config_list;
1701 }
1702
1703
1704 _X_EXPORT int
1705 glXGetFBConfigAttrib(Display * dpy, GLXFBConfig fbconfig,
1706                      int attribute, int *value)
1707 {
1708    struct glx_config *config = ValidateGLXFBConfig(dpy, fbconfig);
1709
1710    if (config == NULL)
1711       return GLXBadFBConfig;
1712
1713    return glx_config_get(config, attribute, value);
1714 }
1715
1716
1717 _X_EXPORT XVisualInfo *
1718 glXGetVisualFromFBConfig(Display * dpy, GLXFBConfig fbconfig)
1719 {
1720    XVisualInfo visualTemplate;
1721    struct glx_config *config = (struct glx_config *) fbconfig;
1722    int count;
1723
1724    /*
1725     ** Get a list of all visuals, return if list is empty
1726     */
1727    visualTemplate.visualid = config->visualID;
1728    return XGetVisualInfo(dpy, VisualIDMask, &visualTemplate, &count);
1729 }
1730
1731 #ifndef GLX_USE_APPLEGL
1732 /*
1733 ** GLX_SGI_swap_control
1734 */
1735 static int
1736 __glXSwapIntervalSGI(int interval)
1737 {
1738    xGLXVendorPrivateReq *req;
1739    struct glx_context *gc = __glXGetCurrentContext();
1740    struct glx_screen *psc;
1741    Display *dpy;
1742    CARD32 *interval_ptr;
1743    CARD8 opcode;
1744
1745    if (gc == NULL) {
1746       return GLX_BAD_CONTEXT;
1747    }
1748
1749    if (interval <= 0) {
1750       return GLX_BAD_VALUE;
1751    }
1752
1753    psc = GetGLXScreenConfigs( gc->currentDpy, gc->screen);
1754
1755 #ifdef GLX_DIRECT_RENDERING
1756    if (gc->isDirect && psc && psc->driScreen &&
1757           psc->driScreen->setSwapInterval) {
1758       __GLXDRIdrawable *pdraw =
1759          GetGLXDRIDrawable(gc->currentDpy, gc->currentDrawable);
1760       psc->driScreen->setSwapInterval(pdraw, interval);
1761       return 0;
1762    }
1763 #endif
1764
1765    dpy = gc->currentDpy;
1766    opcode = __glXSetupForCommand(dpy);
1767    if (!opcode) {
1768       return 0;
1769    }
1770
1771    /* Send the glXSwapIntervalSGI request */
1772    LockDisplay(dpy);
1773    GetReqExtra(GLXVendorPrivate, sizeof(CARD32), req);
1774    req->reqType = opcode;
1775    req->glxCode = X_GLXVendorPrivate;
1776    req->vendorCode = X_GLXvop_SwapIntervalSGI;
1777    req->contextTag = gc->currentContextTag;
1778
1779    interval_ptr = (CARD32 *) (req + 1);
1780    *interval_ptr = interval;
1781
1782    UnlockDisplay(dpy);
1783    SyncHandle();
1784    XFlush(dpy);
1785
1786    return 0;
1787 }
1788
1789
1790 /*
1791 ** GLX_MESA_swap_control
1792 */
1793 static int
1794 __glXSwapIntervalMESA(unsigned int interval)
1795 {
1796 #ifdef GLX_DIRECT_RENDERING
1797    struct glx_context *gc = __glXGetCurrentContext();
1798
1799    if (gc != NULL && gc->isDirect) {
1800       struct glx_screen *psc;
1801
1802       psc = GetGLXScreenConfigs( gc->currentDpy, gc->screen);
1803       if (psc && psc->driScreen && psc->driScreen->setSwapInterval) {
1804          __GLXDRIdrawable *pdraw =
1805             GetGLXDRIDrawable(gc->currentDpy, gc->currentDrawable);
1806          return psc->driScreen->setSwapInterval(pdraw, interval);
1807       }
1808    }
1809 #endif
1810
1811    return GLX_BAD_CONTEXT;
1812 }
1813
1814
1815 static int
1816 __glXGetSwapIntervalMESA(void)
1817 {
1818 #ifdef GLX_DIRECT_RENDERING
1819    struct glx_context *gc = __glXGetCurrentContext();
1820
1821    if (gc != NULL && gc->isDirect) {
1822       struct glx_screen *psc;
1823
1824       psc = GetGLXScreenConfigs( gc->currentDpy, gc->screen);
1825       if (psc && psc->driScreen && psc->driScreen->getSwapInterval) {
1826          __GLXDRIdrawable *pdraw =
1827             GetGLXDRIDrawable(gc->currentDpy, gc->currentDrawable);
1828          return psc->driScreen->getSwapInterval(pdraw);
1829       }
1830    }
1831 #endif
1832
1833    return 0;
1834 }
1835
1836
1837 /*
1838 ** GLX_SGI_video_sync
1839 */
1840 static int
1841 __glXGetVideoSyncSGI(unsigned int *count)
1842 {
1843    int64_t ust, msc, sbc;
1844    int ret;
1845    struct glx_context *gc = __glXGetCurrentContext();
1846    struct glx_screen *psc;
1847 #ifdef GLX_DIRECT_RENDERING
1848    __GLXDRIdrawable *pdraw;
1849 #endif
1850
1851    if (!gc)
1852       return GLX_BAD_CONTEXT;
1853
1854 #ifdef GLX_DIRECT_RENDERING
1855    if (!gc->isDirect)
1856       return GLX_BAD_CONTEXT;
1857 #endif
1858
1859    psc = GetGLXScreenConfigs(gc->currentDpy, gc->screen);
1860 #ifdef GLX_DIRECT_RENDERING
1861    pdraw = GetGLXDRIDrawable(gc->currentDpy, gc->currentDrawable);
1862 #endif
1863
1864    /* FIXME: Looking at the GLX_SGI_video_sync spec in the extension registry,
1865     * FIXME: there should be a GLX encoding for this call.  I can find no
1866     * FIXME: documentation for the GLX encoding.
1867     */
1868 #ifdef GLX_DIRECT_RENDERING
1869    if (psc && psc->driScreen && psc->driScreen->getDrawableMSC) {
1870       ret = psc->driScreen->getDrawableMSC(psc, pdraw, &ust, &msc, &sbc);
1871       *count = (unsigned) msc;
1872       return (ret == True) ? 0 : GLX_BAD_CONTEXT;
1873    }
1874 #endif
1875
1876    return GLX_BAD_CONTEXT;
1877 }
1878
1879 static int
1880 __glXWaitVideoSyncSGI(int divisor, int remainder, unsigned int *count)
1881 {
1882    struct glx_context *gc = __glXGetCurrentContext();
1883    struct glx_screen *psc;
1884 #ifdef GLX_DIRECT_RENDERING
1885    __GLXDRIdrawable *pdraw;
1886 #endif
1887    int64_t ust, msc, sbc;
1888    int ret;
1889
1890    if (divisor <= 0 || remainder < 0)
1891       return GLX_BAD_VALUE;
1892
1893    if (!gc)
1894       return GLX_BAD_CONTEXT;
1895
1896 #ifdef GLX_DIRECT_RENDERING
1897    if (!gc->isDirect)
1898       return GLX_BAD_CONTEXT;
1899 #endif
1900
1901    psc = GetGLXScreenConfigs( gc->currentDpy, gc->screen);
1902 #ifdef GLX_DIRECT_RENDERING
1903    pdraw = GetGLXDRIDrawable(gc->currentDpy, gc->currentDrawable);
1904 #endif
1905
1906 #ifdef GLX_DIRECT_RENDERING
1907    if (psc && psc->driScreen && psc->driScreen->waitForMSC) {
1908       ret = psc->driScreen->waitForMSC(pdraw, 0, divisor, remainder, &ust, &msc,
1909                                        &sbc);
1910       *count = (unsigned) msc;
1911       return (ret == True) ? 0 : GLX_BAD_CONTEXT;
1912    }
1913 #endif
1914
1915    return GLX_BAD_CONTEXT;
1916 }
1917
1918 #endif /* GLX_USE_APPLEGL */
1919
1920 /*
1921 ** GLX_SGIX_fbconfig
1922 ** Many of these functions are aliased to GLX 1.3 entry points in the
1923 ** GLX_functions table.
1924 */
1925
1926 _X_EXPORT
1927 GLX_ALIAS(int, glXGetFBConfigAttribSGIX,
1928           (Display * dpy, GLXFBConfigSGIX config, int attribute, int *value),
1929           (dpy, config, attribute, value), glXGetFBConfigAttrib)
1930
1931 _X_EXPORT GLX_ALIAS(GLXFBConfigSGIX *, glXChooseFBConfigSGIX,
1932                  (Display * dpy, int screen, int *attrib_list,
1933                   int *nelements), (dpy, screen, attrib_list, nelements),
1934                  glXChooseFBConfig)
1935
1936 _X_EXPORT GLX_ALIAS(XVisualInfo *, glXGetVisualFromFBConfigSGIX,
1937                  (Display * dpy, GLXFBConfigSGIX config),
1938                  (dpy, config), glXGetVisualFromFBConfig)
1939
1940 _X_EXPORT GLXPixmap
1941 glXCreateGLXPixmapWithConfigSGIX(Display * dpy,
1942                                  GLXFBConfigSGIX fbconfig,
1943                                  Pixmap pixmap)
1944 {
1945 #ifndef GLX_USE_APPLEGL
1946    xGLXVendorPrivateWithReplyReq *vpreq;
1947    xGLXCreateGLXPixmapWithConfigSGIXReq *req;
1948    GLXPixmap xid = None;
1949    CARD8 opcode;
1950    struct glx_screen *psc;
1951 #endif
1952    struct glx_config *config = (struct glx_config *) fbconfig;
1953
1954
1955    if ((dpy == NULL) || (config == NULL)) {
1956       return None;
1957    }
1958 #ifdef GLX_USE_APPLEGL
1959    if(apple_glx_pixmap_create(dpy, config->screen, pixmap, config))
1960       return None;
1961    return pixmap;
1962 #else
1963
1964    psc = GetGLXScreenConfigs(dpy, config->screen);
1965    if ((psc != NULL)
1966        && __glXExtensionBitIsEnabled(psc, SGIX_fbconfig_bit)) {
1967       opcode = __glXSetupForCommand(dpy);
1968       if (!opcode) {
1969          return None;
1970       }
1971
1972       /* Send the glXCreateGLXPixmapWithConfigSGIX request */
1973       LockDisplay(dpy);
1974       GetReqExtra(GLXVendorPrivateWithReply,
1975                   sz_xGLXCreateGLXPixmapWithConfigSGIXReq -
1976                   sz_xGLXVendorPrivateWithReplyReq, vpreq);
1977       req = (xGLXCreateGLXPixmapWithConfigSGIXReq *) vpreq;
1978       req->reqType = opcode;
1979       req->glxCode = X_GLXVendorPrivateWithReply;
1980       req->vendorCode = X_GLXvop_CreateGLXPixmapWithConfigSGIX;
1981       req->screen = config->screen;
1982       req->fbconfig = config->fbconfigID;
1983       req->pixmap = pixmap;
1984       req->glxpixmap = xid = XAllocID(dpy);
1985       UnlockDisplay(dpy);
1986       SyncHandle();
1987    }
1988
1989    return xid;
1990 #endif
1991 }
1992
1993 _X_EXPORT GLXContext
1994 glXCreateContextWithConfigSGIX(Display * dpy,
1995                                GLXFBConfigSGIX fbconfig, int renderType,
1996                                GLXContext shareList, Bool allowDirect)
1997 {
1998    GLXContext gc = NULL;
1999    struct glx_config *config = (struct glx_config *) fbconfig;
2000    struct glx_screen *psc;
2001
2002
2003    if ((dpy == NULL) || (config == NULL)) {
2004       return None;
2005    }
2006
2007    psc = GetGLXScreenConfigs(dpy, config->screen);
2008    if ((psc != NULL)
2009        && __glXExtensionBitIsEnabled(psc, SGIX_fbconfig_bit)) {
2010       gc = CreateContext(dpy, config->fbconfigID, config, shareList,
2011                          allowDirect,
2012                          X_GLXvop_CreateContextWithConfigSGIX, renderType,
2013                          config->screen);
2014    }
2015
2016    return gc;
2017 }
2018
2019
2020 _X_EXPORT GLXFBConfigSGIX
2021 glXGetFBConfigFromVisualSGIX(Display * dpy, XVisualInfo * vis)
2022 {
2023    struct glx_display *priv;
2024    struct glx_screen *psc = NULL;
2025
2026    if ((GetGLXPrivScreenConfig(dpy, vis->screen, &priv, &psc) == Success)
2027        && __glXExtensionBitIsEnabled(psc, SGIX_fbconfig_bit)
2028        && (psc->configs->fbconfigID != (int) GLX_DONT_CARE)) {
2029       return (GLXFBConfigSGIX) glx_config_find_visual(psc->configs,
2030                                                       vis->visualid);
2031    }
2032
2033    return NULL;
2034 }
2035
2036 #ifndef GLX_USE_APPLEGL
2037 /*
2038 ** GLX_SGIX_swap_group
2039 */
2040 static void
2041 __glXJoinSwapGroupSGIX(Display * dpy, GLXDrawable drawable,
2042                        GLXDrawable member)
2043 {
2044    (void) dpy;
2045    (void) drawable;
2046    (void) member;
2047 }
2048
2049
2050 /*
2051 ** GLX_SGIX_swap_barrier
2052 */
2053 static void
2054 __glXBindSwapBarrierSGIX(Display * dpy, GLXDrawable drawable, int barrier)
2055 {
2056    (void) dpy;
2057    (void) drawable;
2058    (void) barrier;
2059 }
2060
2061 static Bool
2062 __glXQueryMaxSwapBarriersSGIX(Display * dpy, int screen, int *max)
2063 {
2064    (void) dpy;
2065    (void) screen;
2066    (void) max;
2067    return False;
2068 }
2069
2070
2071 /*
2072 ** GLX_OML_sync_control
2073 */
2074 static Bool
2075 __glXGetSyncValuesOML(Display * dpy, GLXDrawable drawable,
2076                       int64_t * ust, int64_t * msc, int64_t * sbc)
2077 {
2078    struct glx_display * const priv = __glXInitialize(dpy);
2079    int ret;
2080 #ifdef GLX_DIRECT_RENDERING
2081    __GLXDRIdrawable *pdraw;
2082 #endif
2083    struct glx_screen *psc;
2084
2085    if (!priv)
2086       return False;
2087
2088 #ifdef GLX_DIRECT_RENDERING
2089    pdraw = GetGLXDRIDrawable(dpy, drawable);
2090    psc = pdraw ? pdraw->psc : NULL;
2091    if (pdraw && psc->driScreen->getDrawableMSC) {
2092       ret = psc->driScreen->getDrawableMSC(psc, pdraw, ust, msc, sbc);
2093       return ret;
2094    }
2095 #endif
2096
2097    return False;
2098 }
2099
2100 #if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
2101 _X_HIDDEN GLboolean
2102 __glxGetMscRate(struct glx_screen *psc,
2103                 int32_t * numerator, int32_t * denominator)
2104 {
2105 #ifdef XF86VIDMODE
2106    XF86VidModeModeLine mode_line;
2107    int dot_clock;
2108    int i;
2109
2110    if (XF86VidModeQueryVersion(psc->dpy, &i, &i) &&
2111        XF86VidModeGetModeLine(psc->dpy, psc->scr, &dot_clock, &mode_line)) {
2112       unsigned n = dot_clock * 1000;
2113       unsigned d = mode_line.vtotal * mode_line.htotal;
2114
2115 # define V_INTERLACE 0x010
2116 # define V_DBLSCAN   0x020
2117
2118       if (mode_line.flags & V_INTERLACE)
2119          n *= 2;
2120       else if (mode_line.flags & V_DBLSCAN)
2121          d *= 2;
2122
2123       /* The OML_sync_control spec requires that if the refresh rate is a
2124        * whole number, that the returned numerator be equal to the refresh
2125        * rate and the denominator be 1.
2126        */
2127
2128       if (n % d == 0) {
2129          n /= d;
2130          d = 1;
2131       }
2132       else {
2133          static const unsigned f[] = { 13, 11, 7, 5, 3, 2, 0 };
2134
2135          /* This is a poor man's way to reduce a fraction.  It's far from
2136           * perfect, but it will work well enough for this situation.
2137           */
2138
2139          for (i = 0; f[i] != 0; i++) {
2140             while (n % f[i] == 0 && d % f[i] == 0) {
2141                d /= f[i];
2142                n /= f[i];
2143             }
2144          }
2145       }
2146
2147       *numerator = n;
2148       *denominator = d;
2149
2150       return True;
2151    }
2152    else
2153 #endif
2154
2155    return False;
2156 }
2157 #endif
2158
2159 /**
2160  * Determine the refresh rate of the specified drawable and display.
2161  *
2162  * \param dpy          Display whose refresh rate is to be determined.
2163  * \param drawable     Drawable whose refresh rate is to be determined.
2164  * \param numerator    Numerator of the refresh rate.
2165  * \param demoninator  Denominator of the refresh rate.
2166  * \return  If the refresh rate for the specified display and drawable could
2167  *          be calculated, True is returned.  Otherwise False is returned.
2168  *
2169  * \note This function is implemented entirely client-side.  A lot of other
2170  *       functionality is required to export GLX_OML_sync_control, so on
2171  *       XFree86 this function can be called for direct-rendering contexts
2172  *       when GLX_OML_sync_control appears in the client extension string.
2173  */
2174
2175 _X_HIDDEN GLboolean
2176 __glXGetMscRateOML(Display * dpy, GLXDrawable drawable,
2177                    int32_t * numerator, int32_t * denominator)
2178 {
2179 #if defined( GLX_DIRECT_RENDERING ) && defined( XF86VIDMODE )
2180    __GLXDRIdrawable *draw = GetGLXDRIDrawable(dpy, drawable);
2181
2182    if (draw == NULL)
2183       return False;
2184
2185    return __glxGetMscRate(draw->psc, numerator, denominator);
2186 #else
2187    (void) dpy;
2188    (void) drawable;
2189    (void) numerator;
2190    (void) denominator;
2191 #endif
2192    return False;
2193 }
2194
2195
2196 static int64_t
2197 __glXSwapBuffersMscOML(Display * dpy, GLXDrawable drawable,
2198                        int64_t target_msc, int64_t divisor, int64_t remainder)
2199 {
2200    struct glx_context *gc = __glXGetCurrentContext();
2201 #ifdef GLX_DIRECT_RENDERING
2202    __GLXDRIdrawable *pdraw = GetGLXDRIDrawable(dpy, drawable);
2203    struct glx_screen *psc = pdraw ? pdraw->psc : NULL;
2204 #endif
2205
2206    if (!gc) /* no GLX for this */
2207       return -1;
2208
2209 #ifdef GLX_DIRECT_RENDERING
2210    if (!pdraw || !gc->isDirect)
2211       return -1;
2212 #endif
2213
2214    /* The OML_sync_control spec says these should "generate a GLX_BAD_VALUE
2215     * error", but it also says "It [glXSwapBuffersMscOML] will return a value
2216     * of -1 if the function failed because of errors detected in the input
2217     * parameters"
2218     */
2219    if (divisor < 0 || remainder < 0 || target_msc < 0)
2220       return -1;
2221    if (divisor > 0 && remainder >= divisor)
2222       return -1;
2223
2224    if (target_msc == 0 && divisor == 0 && remainder == 0)
2225       remainder = 1;
2226
2227 #ifdef GLX_DIRECT_RENDERING
2228    if (psc->driScreen && psc->driScreen->swapBuffers)
2229       return (*psc->driScreen->swapBuffers)(pdraw, target_msc, divisor,
2230                                             remainder, False);
2231 #endif
2232
2233    return -1;
2234 }
2235
2236
2237 static Bool
2238 __glXWaitForMscOML(Display * dpy, GLXDrawable drawable,
2239                    int64_t target_msc, int64_t divisor,
2240                    int64_t remainder, int64_t * ust,
2241                    int64_t * msc, int64_t * sbc)
2242 {
2243 #ifdef GLX_DIRECT_RENDERING
2244    __GLXDRIdrawable *pdraw = GetGLXDRIDrawable(dpy, drawable);
2245    struct glx_screen *psc = pdraw ? pdraw->psc : NULL;
2246    int ret;
2247 #endif
2248
2249
2250    /* The OML_sync_control spec says these should "generate a GLX_BAD_VALUE
2251     * error", but the return type in the spec is Bool.
2252     */
2253    if (divisor < 0 || remainder < 0 || target_msc < 0)
2254       return False;
2255    if (divisor > 0 && remainder >= divisor)
2256       return False;
2257
2258 #ifdef GLX_DIRECT_RENDERING
2259    if (pdraw && psc->driScreen && psc->driScreen->waitForMSC) {
2260       ret = psc->driScreen->waitForMSC(pdraw, target_msc, divisor, remainder,
2261                                        ust, msc, sbc);
2262       return ret;
2263    }
2264 #endif
2265
2266    return False;
2267 }
2268
2269
2270 static Bool
2271 __glXWaitForSbcOML(Display * dpy, GLXDrawable drawable,
2272                    int64_t target_sbc, int64_t * ust,
2273                    int64_t * msc, int64_t * sbc)
2274 {
2275 #ifdef GLX_DIRECT_RENDERING
2276    __GLXDRIdrawable *pdraw = GetGLXDRIDrawable(dpy, drawable);
2277    struct glx_screen *psc = pdraw ? pdraw->psc : NULL;
2278    int ret;
2279 #endif
2280
2281    /* The OML_sync_control spec says this should "generate a GLX_BAD_VALUE
2282     * error", but the return type in the spec is Bool.
2283     */
2284    if (target_sbc < 0)
2285       return False;
2286
2287 #ifdef GLX_DIRECT_RENDERING
2288    if (pdraw && psc->driScreen && psc->driScreen->waitForSBC) {
2289       ret = psc->driScreen->waitForSBC(pdraw, target_sbc, ust, msc, sbc);
2290       return ret;
2291    }
2292 #endif
2293
2294    return False;
2295 }
2296
2297 /*@}*/
2298
2299
2300 /**
2301  * Mesa extension stubs.  These will help reduce portability problems.
2302  */
2303 /*@{*/
2304
2305 /**
2306  * Release all buffers associated with the specified GLX drawable.
2307  *
2308  * \todo
2309  * This function was intended for stand-alone Mesa.  The issue there is that
2310  * the library doesn't get any notification when a window is closed.  In
2311  * DRI there is a similar but slightly different issue.  When GLX 1.3 is
2312  * supported, there are 3 different functions to destroy a drawable.  It
2313  * should be possible to create GLX protocol (or have it determine which
2314  * protocol to use based on the type of the drawable) to have one function
2315  * do the work of 3.  For the direct-rendering case, this function could
2316  * just call the driver's \c __DRIdrawableRec::destroyDrawable function.
2317  * This would reduce the frequency with which \c __driGarbageCollectDrawables
2318  * would need to be used.  This really should be done as part of the new DRI
2319  * interface work.
2320  *
2321  * \sa http://oss.sgi.com/projects/ogl-sample/registry/MESA/release_buffers.txt
2322  *     __driGarbageCollectDrawables
2323  *     glXDestroyGLXPixmap
2324  *     glXDestroyPbuffer glXDestroyPixmap glXDestroyWindow
2325  *     glXDestroyGLXPbufferSGIX glXDestroyGLXVideoSourceSGIX
2326  */
2327 static Bool
2328 __glXReleaseBuffersMESA(Display * dpy, GLXDrawable d)
2329 {
2330    (void) dpy;
2331    (void) d;
2332    return False;
2333 }
2334
2335
2336 _X_EXPORT GLXPixmap
2337 glXCreateGLXPixmapMESA(Display * dpy, XVisualInfo * visual,
2338                        Pixmap pixmap, Colormap cmap)
2339 {
2340    (void) dpy;
2341    (void) visual;
2342    (void) pixmap;
2343    (void) cmap;
2344    return 0;
2345 }
2346
2347 /*@}*/
2348
2349
2350 /**
2351  * GLX_MESA_copy_sub_buffer
2352  */
2353 #define X_GLXvop_CopySubBufferMESA 5154 /* temporary */
2354 static void
2355 __glXCopySubBufferMESA(Display * dpy, GLXDrawable drawable,
2356                        int x, int y, int width, int height)
2357 {
2358    xGLXVendorPrivateReq *req;
2359    struct glx_context *gc;
2360    GLXContextTag tag;
2361    CARD32 *drawable_ptr;
2362    INT32 *x_ptr, *y_ptr, *w_ptr, *h_ptr;
2363    CARD8 opcode;
2364
2365 #if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
2366    __GLXDRIdrawable *pdraw = GetGLXDRIDrawable(dpy, drawable);
2367    if (pdraw != NULL) {
2368       struct glx_screen *psc = pdraw->psc;
2369       if (psc->driScreen->copySubBuffer != NULL) {
2370          (*psc->driScreen->copySubBuffer) (pdraw, x, y, width, height, True);
2371       }
2372
2373       return;
2374    }
2375 #endif
2376
2377    opcode = __glXSetupForCommand(dpy);
2378    if (!opcode)
2379       return;
2380
2381    /*
2382     ** The calling thread may or may not have a current context.  If it
2383     ** does, send the context tag so the server can do a flush.
2384     */
2385    gc = __glXGetCurrentContext();
2386    if ((gc != NULL) && (dpy == gc->currentDpy) &&
2387        ((drawable == gc->currentDrawable) ||
2388         (drawable == gc->currentReadable))) {
2389       tag = gc->currentContextTag;
2390    }
2391    else {
2392       tag = 0;
2393    }
2394
2395    LockDisplay(dpy);
2396    GetReqExtra(GLXVendorPrivate, sizeof(CARD32) + sizeof(INT32) * 4, req);
2397    req->reqType = opcode;
2398    req->glxCode = X_GLXVendorPrivate;
2399    req->vendorCode = X_GLXvop_CopySubBufferMESA;
2400    req->contextTag = tag;
2401
2402    drawable_ptr = (CARD32 *) (req + 1);
2403    x_ptr = (INT32 *) (drawable_ptr + 1);
2404    y_ptr = (INT32 *) (drawable_ptr + 2);
2405    w_ptr = (INT32 *) (drawable_ptr + 3);
2406    h_ptr = (INT32 *) (drawable_ptr + 4);
2407
2408    *drawable_ptr = drawable;
2409    *x_ptr = x;
2410    *y_ptr = y;
2411    *w_ptr = width;
2412    *h_ptr = height;
2413
2414    UnlockDisplay(dpy);
2415    SyncHandle();
2416 }
2417
2418 /*@{*/
2419 static void
2420 __glXBindTexImageEXT(Display * dpy,
2421                      GLXDrawable drawable, int buffer, const int *attrib_list)
2422 {
2423    struct glx_context *gc = __glXGetCurrentContext();
2424
2425    if (gc == NULL || gc->vtable->bind_tex_image == NULL)
2426       return;
2427
2428    gc->vtable->bind_tex_image(dpy, drawable, buffer, attrib_list);
2429 }
2430
2431 static void
2432 __glXReleaseTexImageEXT(Display * dpy, GLXDrawable drawable, int buffer)
2433 {
2434    struct glx_context *gc = __glXGetCurrentContext();
2435
2436    if (gc == NULL || gc->vtable->release_tex_image == NULL)
2437       return;
2438
2439    gc->vtable->release_tex_image(dpy, drawable, buffer);
2440 }
2441
2442 /*@}*/
2443
2444 #endif /* GLX_USE_APPLEGL */
2445
2446 /**
2447  * \c strdup is actually not a standard ANSI C or POSIX routine.
2448  * Irix will not define it if ANSI mode is in effect.
2449  *
2450  * \sa strdup
2451  */
2452 _X_HIDDEN char *
2453 __glXstrdup(const char *str)
2454 {
2455    char *copy;
2456    copy = malloc(strlen(str) + 1);
2457    if (!copy)
2458       return NULL;
2459    strcpy(copy, str);
2460    return copy;
2461 }
2462
2463 /*
2464 ** glXGetProcAddress support
2465 */
2466
2467 struct name_address_pair
2468 {
2469    const char *Name;
2470    GLvoid *Address;
2471 };
2472
2473 #define GLX_FUNCTION(f) { # f, (GLvoid *) f }
2474 #define GLX_FUNCTION2(n,f) { # n, (GLvoid *) f }
2475
2476 static const struct name_address_pair GLX_functions[] = {
2477    /*** GLX_VERSION_1_0 ***/
2478    GLX_FUNCTION(glXChooseVisual),
2479    GLX_FUNCTION(glXCopyContext),
2480    GLX_FUNCTION(glXCreateContext),
2481    GLX_FUNCTION(glXCreateGLXPixmap),
2482    GLX_FUNCTION(glXDestroyContext),
2483    GLX_FUNCTION(glXDestroyGLXPixmap),
2484    GLX_FUNCTION(glXGetConfig),
2485    GLX_FUNCTION(glXGetCurrentContext),
2486    GLX_FUNCTION(glXGetCurrentDrawable),
2487    GLX_FUNCTION(glXIsDirect),
2488    GLX_FUNCTION(glXMakeCurrent),
2489    GLX_FUNCTION(glXQueryExtension),
2490    GLX_FUNCTION(glXQueryVersion),
2491    GLX_FUNCTION(glXSwapBuffers),
2492    GLX_FUNCTION(glXUseXFont),
2493    GLX_FUNCTION(glXWaitGL),
2494    GLX_FUNCTION(glXWaitX),
2495
2496    /*** GLX_VERSION_1_1 ***/
2497    GLX_FUNCTION(glXGetClientString),
2498    GLX_FUNCTION(glXQueryExtensionsString),
2499    GLX_FUNCTION(glXQueryServerString),
2500
2501    /*** GLX_VERSION_1_2 ***/
2502    GLX_FUNCTION(glXGetCurrentDisplay),
2503
2504    /*** GLX_VERSION_1_3 ***/
2505    GLX_FUNCTION(glXChooseFBConfig),
2506    GLX_FUNCTION(glXCreateNewContext),
2507    GLX_FUNCTION(glXCreatePbuffer),
2508    GLX_FUNCTION(glXCreatePixmap),
2509    GLX_FUNCTION(glXCreateWindow),
2510    GLX_FUNCTION(glXDestroyPbuffer),
2511    GLX_FUNCTION(glXDestroyPixmap),
2512    GLX_FUNCTION(glXDestroyWindow),
2513    GLX_FUNCTION(glXGetCurrentReadDrawable),
2514    GLX_FUNCTION(glXGetFBConfigAttrib),
2515    GLX_FUNCTION(glXGetFBConfigs),
2516    GLX_FUNCTION(glXGetSelectedEvent),
2517    GLX_FUNCTION(glXGetVisualFromFBConfig),
2518    GLX_FUNCTION(glXMakeContextCurrent),
2519    GLX_FUNCTION(glXQueryContext),
2520    GLX_FUNCTION(glXQueryDrawable),
2521    GLX_FUNCTION(glXSelectEvent),
2522
2523 #ifndef GLX_USE_APPLEGL
2524    /*** GLX_SGI_swap_control ***/
2525    GLX_FUNCTION2(glXSwapIntervalSGI, __glXSwapIntervalSGI),
2526
2527    /*** GLX_SGI_video_sync ***/
2528    GLX_FUNCTION2(glXGetVideoSyncSGI, __glXGetVideoSyncSGI),
2529    GLX_FUNCTION2(glXWaitVideoSyncSGI, __glXWaitVideoSyncSGI),
2530
2531    /*** GLX_SGI_make_current_read ***/
2532    GLX_FUNCTION2(glXMakeCurrentReadSGI, glXMakeContextCurrent),
2533    GLX_FUNCTION2(glXGetCurrentReadDrawableSGI, glXGetCurrentReadDrawable),
2534
2535    /*** GLX_EXT_import_context ***/
2536    GLX_FUNCTION(glXFreeContextEXT),
2537    GLX_FUNCTION(glXGetContextIDEXT),
2538    GLX_FUNCTION2(glXGetCurrentDisplayEXT, glXGetCurrentDisplay),
2539    GLX_FUNCTION(glXImportContextEXT),
2540    GLX_FUNCTION2(glXQueryContextInfoEXT, glXQueryContext),
2541 #endif
2542
2543    /*** GLX_SGIX_fbconfig ***/
2544    GLX_FUNCTION2(glXGetFBConfigAttribSGIX, glXGetFBConfigAttrib),
2545    GLX_FUNCTION2(glXChooseFBConfigSGIX, glXChooseFBConfig),
2546    GLX_FUNCTION(glXCreateGLXPixmapWithConfigSGIX),
2547    GLX_FUNCTION(glXCreateContextWithConfigSGIX),
2548    GLX_FUNCTION2(glXGetVisualFromFBConfigSGIX, glXGetVisualFromFBConfig),
2549    GLX_FUNCTION(glXGetFBConfigFromVisualSGIX),
2550
2551 #ifndef GLX_USE_APPLEGL
2552    /*** GLX_SGIX_pbuffer ***/
2553    GLX_FUNCTION(glXCreateGLXPbufferSGIX),
2554    GLX_FUNCTION(glXDestroyGLXPbufferSGIX),
2555    GLX_FUNCTION(glXQueryGLXPbufferSGIX),
2556    GLX_FUNCTION(glXSelectEventSGIX),
2557    GLX_FUNCTION(glXGetSelectedEventSGIX),
2558
2559    /*** GLX_SGIX_swap_group ***/
2560    GLX_FUNCTION2(glXJoinSwapGroupSGIX, __glXJoinSwapGroupSGIX),
2561
2562    /*** GLX_SGIX_swap_barrier ***/
2563    GLX_FUNCTION2(glXBindSwapBarrierSGIX, __glXBindSwapBarrierSGIX),
2564    GLX_FUNCTION2(glXQueryMaxSwapBarriersSGIX, __glXQueryMaxSwapBarriersSGIX),
2565
2566    /*** GLX_MESA_copy_sub_buffer ***/
2567    GLX_FUNCTION2(glXCopySubBufferMESA, __glXCopySubBufferMESA),
2568
2569    /*** GLX_MESA_pixmap_colormap ***/
2570    GLX_FUNCTION(glXCreateGLXPixmapMESA),
2571
2572    /*** GLX_MESA_release_buffers ***/
2573    GLX_FUNCTION2(glXReleaseBuffersMESA, __glXReleaseBuffersMESA),
2574
2575    /*** GLX_MESA_swap_control ***/
2576    GLX_FUNCTION2(glXSwapIntervalMESA, __glXSwapIntervalMESA),
2577    GLX_FUNCTION2(glXGetSwapIntervalMESA, __glXGetSwapIntervalMESA),
2578 #endif
2579
2580    /*** GLX_ARB_get_proc_address ***/
2581    GLX_FUNCTION(glXGetProcAddressARB),
2582
2583    /*** GLX 1.4 ***/
2584    GLX_FUNCTION2(glXGetProcAddress, glXGetProcAddressARB),
2585
2586 #ifndef GLX_USE_APPLEGL
2587    /*** GLX_OML_sync_control ***/
2588    GLX_FUNCTION2(glXWaitForSbcOML, __glXWaitForSbcOML),
2589    GLX_FUNCTION2(glXWaitForMscOML, __glXWaitForMscOML),
2590    GLX_FUNCTION2(glXSwapBuffersMscOML, __glXSwapBuffersMscOML),
2591    GLX_FUNCTION2(glXGetMscRateOML, __glXGetMscRateOML),
2592    GLX_FUNCTION2(glXGetSyncValuesOML, __glXGetSyncValuesOML),
2593
2594    /*** GLX_EXT_texture_from_pixmap ***/
2595    GLX_FUNCTION2(glXBindTexImageEXT, __glXBindTexImageEXT),
2596    GLX_FUNCTION2(glXReleaseTexImageEXT, __glXReleaseTexImageEXT),
2597 #endif
2598
2599 #if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
2600    /*** DRI configuration ***/
2601    GLX_FUNCTION(glXGetScreenDriver),
2602    GLX_FUNCTION(glXGetDriverConfig),
2603 #endif
2604
2605    /*** GLX_ARB_create_context and GLX_ARB_create_context_profile ***/
2606    GLX_FUNCTION(glXCreateContextAttribsARB),
2607
2608    /*** GLX_MESA_query_renderer ***/
2609    GLX_FUNCTION(glXQueryRendererIntegerMESA),
2610    GLX_FUNCTION(glXQueryRendererStringMESA),
2611    GLX_FUNCTION(glXQueryCurrentRendererIntegerMESA),
2612    GLX_FUNCTION(glXQueryCurrentRendererStringMESA),
2613
2614    {NULL, NULL}                 /* end of list */
2615 };
2616
2617 static const GLvoid *
2618 get_glx_proc_address(const char *funcName)
2619 {
2620    GLuint i;
2621
2622    /* try static functions */
2623    for (i = 0; GLX_functions[i].Name; i++) {
2624       if (strcmp(GLX_functions[i].Name, funcName) == 0)
2625          return GLX_functions[i].Address;
2626    }
2627
2628    return NULL;
2629 }
2630
2631 /**
2632  * Get the address of a named GL function.  This is the pre-GLX 1.4 name for
2633  * \c glXGetProcAddress.
2634  *
2635  * \param procName  Name of a GL or GLX function.
2636  * \returns         A pointer to the named function
2637  *
2638  * \sa glXGetProcAddress
2639  */
2640 _X_EXPORT void (*glXGetProcAddressARB(const GLubyte * procName)) (void)
2641 {
2642    typedef void (*gl_function) (void);
2643    gl_function f;
2644
2645
2646    /* Search the table of GLX and internal functions first.  If that
2647     * fails and the supplied name could be a valid core GL name, try
2648     * searching the core GL function table.  This check is done to prevent
2649     * DRI based drivers from searching the core GL function table for
2650     * internal API functions.
2651     */
2652    f = (gl_function) get_glx_proc_address((const char *) procName);
2653    if ((f == NULL) && (procName[0] == 'g') && (procName[1] == 'l')
2654        && (procName[2] != 'X')) {
2655 #ifdef GLX_SHARED_GLAPI
2656       f = (gl_function) __indirect_get_proc_address((const char *) procName);
2657 #endif
2658       if (!f)
2659          f = (gl_function) _glapi_get_proc_address((const char *) procName);
2660       if (!f) {
2661          struct glx_context *gc = __glXGetCurrentContext();
2662
2663          if (gc != NULL && gc->vtable->get_proc_address != NULL)
2664             f = gc->vtable->get_proc_address((const char *) procName);
2665       }
2666    }
2667    return f;
2668 }
2669
2670 /**
2671  * Get the address of a named GL function.  This is the GLX 1.4 name for
2672  * \c glXGetProcAddressARB.
2673  *
2674  * \param procName  Name of a GL or GLX function.
2675  * \returns         A pointer to the named function
2676  *
2677  * \sa glXGetProcAddressARB
2678  */
2679 _X_EXPORT void (*glXGetProcAddress(const GLubyte * procName)) (void)
2680 #if defined(__GNUC__) && !defined(GLX_ALIAS_UNSUPPORTED)
2681    __attribute__ ((alias("glXGetProcAddressARB")));
2682 #else
2683 {
2684    return glXGetProcAddressARB(procName);
2685 }
2686 #endif /* __GNUC__ */
2687
2688
2689 #if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
2690 /**
2691  * Get the unadjusted system time (UST).  Currently, the UST is measured in
2692  * microseconds since Epoc.  The actual resolution of the UST may vary from
2693  * system to system, and the units may vary from release to release.
2694  * Drivers should not call this function directly.  They should instead use
2695  * \c glXGetProcAddress to obtain a pointer to the function.
2696  *
2697  * \param ust Location to store the 64-bit UST
2698  * \returns Zero on success or a negative errno value on failure.
2699  *
2700  * \sa glXGetProcAddress, PFNGLXGETUSTPROC
2701  *
2702  * \since Internal API version 20030317.
2703  */
2704 _X_HIDDEN int
2705 __glXGetUST(int64_t * ust)
2706 {
2707    struct timeval tv;
2708
2709    if (ust == NULL) {
2710       return -EFAULT;
2711    }
2712
2713    if (gettimeofday(&tv, NULL) == 0) {
2714       ust[0] = (tv.tv_sec * 1000000) + tv.tv_usec;
2715       return 0;
2716    }
2717    else {
2718       return -errno;
2719    }
2720 }
2721 #endif /* GLX_DIRECT_RENDERING */