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/apple_glx_context.h"
  45 #include "apple/apple_glx.h"
  46 #else
  47 #include <sys/time.h>
  48 #ifdef XF86VIDMODE
  49 #include <X11/extensions/xf86vmode.h>
  50 #endif
  51 #endif
  52 #endif
  53
  54 #include <X11/Xlib-xcb.h>
  55 #include <xcb/xcb.h>
  56 #include <xcb/glx.h>
  57 #include "GL/mesa_glinterop.h"
  58
  59 static const char __glXGLXClientVendorName[] = "Mesa Project and SGI";
  60 static const char __glXGLXClientVersion[] = "1.4";
  61
  62 #if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
  63
  64 /**
  65  * Get the __DRIdrawable for the drawable associated with a GLXContext
  66  *
  67  * \param dpy       The display associated with \c drawable.
  68  * \param drawable  GLXDrawable whose __DRIdrawable part is to be retrieved.
  69  * \param scrn_num  If non-NULL, the drawables screen is stored there
  70  * \returns  A pointer to the context's __DRIdrawable on success, or NULL if
  71  *           the drawable is not associated with a direct-rendering context.
  72  */
  73 _X_HIDDEN __GLXDRIdrawable *
  74 GetGLXDRIDrawable(Display * dpy, GLXDrawable drawable)
  75 {
  76    struct glx_display *priv = __glXInitialize(dpy);
  77    __GLXDRIdrawable *pdraw;
  78
  79    if (priv == NULL)
  80       return NULL;
  81
  82    if (__glxHashLookup(priv->drawHash, drawable, (void *) &pdraw) == 0)
  83       return pdraw;
  84
  85    return NULL;
  86 }
  87
  88 #endif
  89
  90 _X_HIDDEN struct glx_drawable *
  91 GetGLXDrawable(Display *dpy, GLXDrawable drawable)
  92 {
  93    struct glx_display *priv = __glXInitialize(dpy);
  94    struct glx_drawable *glxDraw;
  95
  96    if (priv == NULL)
  97       return NULL;
  98
  99    if (__glxHashLookup(priv->glXDrawHash, drawable, (void *) &glxDraw) == 0)
 100       return glxDraw;
 101
 102    return NULL;
 103 }
 104
 105 _X_HIDDEN int
 106 InitGLXDrawable(Display *dpy, struct glx_drawable *glxDraw, XID xDrawable,
 107                 GLXDrawable drawable)
 108 {
 109    struct glx_display *priv = __glXInitialize(dpy);
 110
 111    if (!priv)
 112       return -1;
 113
 114    glxDraw->xDrawable = xDrawable;
 115    glxDraw->drawable = drawable;
 116    glxDraw->lastEventSbc = 0;
 117    glxDraw->eventSbcWrap = 0;
 118
 119    return __glxHashInsert(priv->glXDrawHash, drawable, glxDraw);
 120 }
 121
 122 _X_HIDDEN void
 123 DestroyGLXDrawable(Display *dpy, GLXDrawable drawable)
 124 {
 125    struct glx_display *priv = __glXInitialize(dpy);
 126    struct glx_drawable *glxDraw;
 127
 128    if (!priv)
 129       return;
 130
 131    glxDraw = GetGLXDrawable(dpy, drawable);
 132    __glxHashDelete(priv->glXDrawHash, drawable);
 133    free(glxDraw);
 134 }
 135
 136 /**
 137  * Get the GLX per-screen data structure associated with a GLX context.
 138  *
 139  * \param dpy   Display for which the GLX per-screen information is to be
 140  *              retrieved.
 141  * \param scrn  Screen on \c dpy for which the GLX per-screen information is
 142  *              to be retrieved.
 143  * \returns A pointer to the GLX per-screen data if \c dpy and \c scrn
 144  *          specify a valid GLX screen, or NULL otherwise.
 145  *
 146  * \todo Should this function validate that \c scrn is within the screen
 147  *       number range for \c dpy?
 148  */
 149
 150 _X_HIDDEN struct glx_screen *
 151 GetGLXScreenConfigs(Display * dpy, int scrn)
 152 {
 153    struct glx_display *const priv = __glXInitialize(dpy);
 154
 155    return (priv
 156            && priv->screens !=
 157            NULL) ? priv->screens[scrn] : NULL;
 158 }
 159
 160
 161 static int
 162 GetGLXPrivScreenConfig(Display * dpy, int scrn, struct glx_display ** ppriv,
 163                        struct glx_screen ** ppsc)
 164 {
 165    /* Initialize the extension, if needed .  This has the added value
 166     * of initializing/allocating the display private
 167     */
 168
 169    if (dpy == NULL) {
 170       return GLX_NO_EXTENSION;
 171    }
 172
 173    *ppriv = __glXInitialize(dpy);
 174    if (*ppriv == NULL) {
 175       return GLX_NO_EXTENSION;
 176    }
 177
 178    /* Check screen number to see if its valid */
 179    if ((scrn < 0) || (scrn >= ScreenCount(dpy))) {
 180       return GLX_BAD_SCREEN;
 181    }
 182
 183    /* Check to see if the GL is supported on this screen */
 184    *ppsc = (*ppriv)->screens[scrn];
 185    if ((*ppsc)->configs == NULL && (*ppsc)->visuals == NULL) {
 186       /* No support for GL on this screen regardless of visual */
 187       return GLX_BAD_VISUAL;
 188    }
 189
 190    return Success;
 191 }
 192
 193
 194 /**
 195  * Determine if a \c GLXFBConfig supplied by the application is valid.
 196  *
 197  * \param dpy     Application supplied \c Display pointer.
 198  * \param config  Application supplied \c GLXFBConfig.
 199  *
 200  * \returns If the \c GLXFBConfig is valid, the a pointer to the matching
 201  *          \c struct glx_config structure is returned.  Otherwise, \c NULL
 202  *          is returned.
 203  */
 204 static struct glx_config *
 205 ValidateGLXFBConfig(Display * dpy, GLXFBConfig fbconfig)
 206 {
 207    struct glx_display *const priv = __glXInitialize(dpy);
 208    int num_screens = ScreenCount(dpy);
 209    unsigned i;
 210    struct glx_config *config;
 211
 212    if (priv != NULL) {
 213       for (i = 0; i < num_screens; i++) {
 214          for (config = priv->screens[i]->configs; config != NULL;
 215               config = config->next) {
 216             if (config == (struct glx_config *) fbconfig) {
 217                return config;
 218             }
 219          }
 220       }
 221    }
 222
 223    return NULL;
 224 }
 225
 226 /**
 227  * Verifies context's GLX_RENDER_TYPE value with config.
 228  *
 229  * \param config GLX FBConfig which will support the returned renderType.
 230  * \param renderType The context render type to be verified.
 231  * \return True if the value of context renderType was approved, or 0 if no
 232  * valid value was found.
 233  */
 234 Bool
 235 validate_renderType_against_config(const struct glx_config *config,
 236                                    int renderType)
 237 {
 238     switch (renderType) {
 239     case GLX_RGBA_TYPE:
 240         return (config->renderType & GLX_RGBA_BIT) != 0;
 241     case GLX_COLOR_INDEX_TYPE:
 242         return (config->renderType & GLX_COLOR_INDEX_BIT) != 0;
 243     case GLX_RGBA_FLOAT_TYPE_ARB:
 244         return (config->renderType & GLX_RGBA_FLOAT_BIT_ARB) != 0;
 245     case GLX_RGBA_UNSIGNED_FLOAT_TYPE_EXT:
 246         return (config->renderType & GLX_RGBA_UNSIGNED_FLOAT_BIT_EXT) != 0;
 247     default:
 248         break;
 249     }
 250     return 0;
 251 }
 252
 253 _X_HIDDEN Bool
 254 glx_context_init(struct glx_context *gc,
 255                  struct glx_screen *psc, struct glx_config *config)
 256 {
 257    gc->majorOpcode = __glXSetupForCommand(psc->display->dpy);
 258    if (!gc->majorOpcode)
 259       return False;
 260
 261    gc->screen = psc->scr;
 262    gc->psc = psc;
 263    gc->config = config;
 264    gc->isDirect = GL_TRUE;
 265    gc->currentContextTag = -1;
 266
 267    return True;
 268 }
 269
 270
 271 /**
 272  * Create a new context.
 273  *
 274  * \param renderType   For FBConfigs, what is the rendering type?
 275  */
 276
 277 static GLXContext
 278 CreateContext(Display *dpy, int generic_id, struct glx_config *config,
 279               GLXContext shareList_user, Bool allowDirect,
 280               unsigned code, int renderType, int screen)
 281 {
 282    struct glx_context *gc;
 283    struct glx_screen *psc;
 284    struct glx_context *shareList = (struct glx_context *) shareList_user;
 285    if (dpy == NULL)
 286       return NULL;
 287
 288    psc = GetGLXScreenConfigs(dpy, screen);
 289    if (psc == NULL)
 290       return NULL;
 291
 292    if (generic_id == None)
 293       return NULL;
 294
 295    gc = NULL;
 296 #ifdef GLX_USE_APPLEGL
 297    gc = applegl_create_context(psc, config, shareList, renderType);
 298 #else
 299    if (allowDirect && psc->vtable->create_context)
 300       gc = psc->vtable->create_context(psc, config, shareList, renderType);
 301    if (!gc)
 302       gc = indirect_create_context(psc, config, shareList, renderType);
 303 #endif
 304    if (!gc)
 305       return NULL;
 306
 307    LockDisplay(dpy);
 308    switch (code) {
 309    case X_GLXCreateContext: {
 310       xGLXCreateContextReq *req;
 311
 312       /* Send the glXCreateContext request */
 313       GetReq(GLXCreateContext, req);
 314       req->reqType = gc->majorOpcode;
 315       req->glxCode = X_GLXCreateContext;
 316       req->context = gc->xid = XAllocID(dpy);
 317       req->visual = generic_id;
 318       req->screen = screen;
 319       req->shareList = shareList ? shareList->xid : None;
 320       req->isDirect = gc->isDirect;
 321       break;
 322    }
 323
 324    case X_GLXCreateNewContext: {
 325       xGLXCreateNewContextReq *req;
 326
 327       /* Send the glXCreateNewContext request */
 328       GetReq(GLXCreateNewContext, req);
 329       req->reqType = gc->majorOpcode;
 330       req->glxCode = X_GLXCreateNewContext;
 331       req->context = gc->xid = XAllocID(dpy);
 332       req->fbconfig = generic_id;
 333       req->screen = screen;
 334       req->renderType = renderType;
 335       req->shareList = shareList ? shareList->xid : None;
 336       req->isDirect = gc->isDirect;
 337       break;
 338    }
 339
 340    case X_GLXvop_CreateContextWithConfigSGIX: {
 341       xGLXVendorPrivateWithReplyReq *vpreq;
 342       xGLXCreateContextWithConfigSGIXReq *req;
 343
 344       /* Send the glXCreateNewContext request */
 345       GetReqExtra(GLXVendorPrivateWithReply,
 346                   sz_xGLXCreateContextWithConfigSGIXReq -
 347                   sz_xGLXVendorPrivateWithReplyReq, vpreq);
 348       req = (xGLXCreateContextWithConfigSGIXReq *) vpreq;
 349       req->reqType = gc->majorOpcode;
 350       req->glxCode = X_GLXVendorPrivateWithReply;
 351       req->vendorCode = X_GLXvop_CreateContextWithConfigSGIX;
 352       req->context = gc->xid = XAllocID(dpy);
 353       req->fbconfig = generic_id;
 354       req->screen = screen;
 355       req->renderType = renderType;
 356       req->shareList = shareList ? shareList->xid : None;
 357       req->isDirect = gc->isDirect;
 358       break;
 359    }
 360
 361    default:
 362       /* What to do here?  This case is the sign of an internal error.  It
 363        * should never be reachable.
 364        */
 365       break;
 366    }
 367
 368    UnlockDisplay(dpy);
 369    SyncHandle();
 370
 371    gc->share_xid = shareList ? shareList->xid : None;
 372    gc->imported = GL_FALSE;
 373
 374    return (GLXContext) gc;
 375 }
 376
 377 _GLX_PUBLIC GLXContext
 378 glXCreateContext(Display * dpy, XVisualInfo * vis,
 379                  GLXContext shareList, Bool allowDirect)
 380 {
 381    struct glx_config *config = NULL;
 382    int renderType = GLX_RGBA_TYPE;
 383
 384 #if defined(GLX_DIRECT_RENDERING) || defined(GLX_USE_APPLEGL)
 385    struct glx_screen *const psc = GetGLXScreenConfigs(dpy, vis->screen);
 386
 387    if (psc)
 388       config = glx_config_find_visual(psc->visuals, vis->visualid);
 389
 390    if (config == NULL) {
 391       xError error;
 392
 393       error.errorCode = BadValue;
 394       error.resourceID = vis->visualid;
 395       error.sequenceNumber = dpy->request;
 396       error.type = X_Error;
 397       error.majorCode = __glXSetupForCommand(dpy);
 398       error.minorCode = X_GLXCreateContext;
 399       _XError(dpy, &error);
 400       return None;
 401    }
 402
 403    /* Choose the context render type based on DRI config values.  It is
 404     * unusual to set this type from config, but we have no other choice, as
 405     * this old API does not provide renderType parameter.
 406     */
 407    if (config->renderType & GLX_RGBA_FLOAT_BIT_ARB) {
 408        renderType = GLX_RGBA_FLOAT_TYPE_ARB;
 409    } else if (config->renderType & GLX_RGBA_UNSIGNED_FLOAT_BIT_EXT) {
 410        renderType = GLX_RGBA_UNSIGNED_FLOAT_TYPE_EXT;
 411    } else if (config->renderType & GLX_RGBA_BIT) {
 412        renderType = GLX_RGBA_TYPE;
 413    } else if (config->renderType & GLX_COLOR_INDEX_BIT) {
 414        renderType = GLX_COLOR_INDEX_TYPE;
 415    } else if (config->rgbMode) {
 416        /* If we're here, then renderType is not set correctly.  Let's use a
 417         * safeguard - any TrueColor or DirectColor mode is RGB mode.  Such
 418         * default value is needed by old DRI drivers, which didn't set
 419         * renderType correctly as the value was just ignored.
 420         */
 421        renderType = GLX_RGBA_TYPE;
 422    } else {
 423        /* Safeguard - only one option left, all non-RGB modes are indexed
 424         * modes.  Again, this allows drivers with invalid renderType to work
 425         * properly.
 426         */
 427        renderType = GLX_COLOR_INDEX_TYPE;
 428    }
 429 #endif
 430
 431    return CreateContext(dpy, vis->visualid, config, shareList, allowDirect,
 432                         X_GLXCreateContext, renderType, vis->screen);
 433 }
 434
 435 static void
 436 glx_send_destroy_context(Display *dpy, XID xid)
 437 {
 438    CARD8 opcode = __glXSetupForCommand(dpy);
 439    xGLXDestroyContextReq *req;
 440
 441    LockDisplay(dpy);
 442    GetReq(GLXDestroyContext, req);
 443    req->reqType = opcode;
 444    req->glxCode = X_GLXDestroyContext;
 445    req->context = xid;
 446    UnlockDisplay(dpy);
 447    SyncHandle();
 448 }
 449
 450 /*
 451 ** Destroy the named context
 452 */
 453
 454 _GLX_PUBLIC void
 455 glXDestroyContext(Display * dpy, GLXContext ctx)
 456 {
 457    struct glx_context *gc = (struct glx_context *) ctx;
 458
 459    if (gc == NULL || gc->xid == None)
 460       return;
 461
 462    __glXLock();
 463    if (!gc->imported)
 464       glx_send_destroy_context(dpy, gc->xid);
 465
 466    if (gc->currentDpy) {
 467       /* This context is bound to some thread.  According to the man page,
 468        * we should not actually delete the context until it's unbound.
 469        * Note that we set gc->xid = None above.  In MakeContextCurrent()
 470        * we check for that and delete the context there.
 471        */
 472       gc->xid = None;
 473    } else {
 474       gc->vtable->destroy(gc);
 475    }
 476    __glXUnlock();
 477 }
 478
 479 /*
 480 ** Return the major and minor version #s for the GLX extension
 481 */
 482 _GLX_PUBLIC Bool
 483 glXQueryVersion(Display * dpy, int *major, int *minor)
 484 {
 485    struct glx_display *priv;
 486
 487    /* Init the extension.  This fetches the major and minor version. */
 488    priv = __glXInitialize(dpy);
 489    if (!priv)
 490       return False;
 491
 492    if (major)
 493       *major = priv->majorVersion;
 494    if (minor)
 495       *minor = priv->minorVersion;
 496    return True;
 497 }
 498
 499 /*
 500 ** Query the existence of the GLX extension
 501 */
 502 _GLX_PUBLIC Bool
 503 glXQueryExtension(Display * dpy, int *errorBase, int *eventBase)
 504 {
 505    int major_op, erb, evb;
 506    Bool rv;
 507
 508    rv = XQueryExtension(dpy, GLX_EXTENSION_NAME, &major_op, &evb, &erb);
 509    if (rv) {
 510       if (errorBase)
 511          *errorBase = erb;
 512       if (eventBase)
 513          *eventBase = evb;
 514    }
 515    return rv;
 516 }
 517
 518 /*
 519 ** Put a barrier in the token stream that forces the GL to finish its
 520 ** work before X can proceed.
 521 */
 522 _GLX_PUBLIC void
 523 glXWaitGL(void)
 524 {
 525    struct glx_context *gc = __glXGetCurrentContext();
 526
 527    if (gc != &dummyContext && gc->vtable->wait_gl)
 528       gc->vtable->wait_gl(gc);
 529 }
 530
 531 /*
 532 ** Put a barrier in the token stream that forces X to finish its
 533 ** work before GL can proceed.
 534 */
 535 _GLX_PUBLIC void
 536 glXWaitX(void)
 537 {
 538    struct glx_context *gc = __glXGetCurrentContext();
 539
 540    if (gc != &dummyContext && gc->vtable->wait_x)
 541       gc->vtable->wait_x(gc);
 542 }
 543
 544 _GLX_PUBLIC void
 545 glXUseXFont(Font font, int first, int count, int listBase)
 546 {
 547    struct glx_context *gc = __glXGetCurrentContext();
 548
 549    if (gc != &dummyContext && gc->vtable->use_x_font)
 550       gc->vtable->use_x_font(gc, font, first, count, listBase);
 551 }
 552
 553 /************************************************************************/
 554
 555 /*
 556 ** Copy the source context to the destination context using the
 557 ** attribute "mask".
 558 */
 559 _GLX_PUBLIC void
 560 glXCopyContext(Display * dpy, GLXContext source_user,
 561                GLXContext dest_user, unsigned long mask)
 562 {
 563    struct glx_context *source = (struct glx_context *) source_user;
 564    struct glx_context *dest = (struct glx_context *) dest_user;
 565 #ifdef GLX_USE_APPLEGL
 566    struct glx_context *gc = __glXGetCurrentContext();
 567    int errorcode;
 568    bool x11error;
 569
 570    if(apple_glx_copy_context(gc->driContext, source->driContext, dest->driContext,
 571                              mask, &errorcode, &x11error)) {
 572       __glXSendError(dpy, errorcode, 0, X_GLXCopyContext, x11error);
 573    }
 574
 575 #else
 576    xGLXCopyContextReq *req;
 577    struct glx_context *gc = __glXGetCurrentContext();
 578    GLXContextTag tag;
 579    CARD8 opcode;
 580
 581    opcode = __glXSetupForCommand(dpy);
 582    if (!opcode) {
 583       return;
 584    }
 585
 586 #if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
 587    if (gc->isDirect) {
 588       /* NOT_DONE: This does not work yet */
 589    }
 590 #endif
 591
 592    /*
 593     ** If the source is the current context, send its tag so that the context
 594     ** can be flushed before the copy.
 595     */
 596    if (source == gc && dpy == gc->currentDpy) {
 597       tag = gc->currentContextTag;
 598    }
 599    else {
 600       tag = 0;
 601    }
 602
 603    /* Send the glXCopyContext request */
 604    LockDisplay(dpy);
 605    GetReq(GLXCopyContext, req);
 606    req->reqType = opcode;
 607    req->glxCode = X_GLXCopyContext;
 608    req->source = source ? source->xid : None;
 609    req->dest = dest ? dest->xid : None;
 610    req->mask = mask;
 611    req->contextTag = tag;
 612    UnlockDisplay(dpy);
 613    SyncHandle();
 614 #endif /* GLX_USE_APPLEGL */
 615 }
 616
 617
 618 /**
 619  * Determine if a context uses direct rendering.
 620  *
 621  * \param dpy        Display where the context was created.
 622  * \param contextID  ID of the context to be tested.
 623  *
 624  * \returns \c True if the context is direct rendering or not.
 625  */
 626 static Bool
 627 __glXIsDirect(Display * dpy, GLXContextID contextID)
 628 {
 629    CARD8 opcode;
 630    xcb_connection_t *c;
 631    xcb_generic_error_t *err;
 632    xcb_glx_is_direct_reply_t *reply;
 633    Bool is_direct;
 634
 635    opcode = __glXSetupForCommand(dpy);
 636    if (!opcode) {
 637       return False;
 638    }
 639
 640    c = XGetXCBConnection(dpy);
 641    reply = xcb_glx_is_direct_reply(c, xcb_glx_is_direct(c, contextID), &err);
 642    is_direct = (reply != NULL && reply->is_direct) ? True : False;
 643
 644    if (err != NULL) {
 645       __glXSendErrorForXcb(dpy, err);
 646       free(err);
 647    }
 648
 649    free(reply);
 650
 651    return is_direct;
 652 }
 653
 654 /**
 655  * \todo
 656  * Shouldn't this function \b always return \c False when
 657  * \c GLX_DIRECT_RENDERING is not defined?  Do we really need to bother with
 658  * the GLX protocol here at all?
 659  */
 660 _GLX_PUBLIC Bool
 661 glXIsDirect(Display * dpy, GLXContext gc_user)
 662 {
 663    struct glx_context *gc = (struct glx_context *) gc_user;
 664
 665    if (!gc) {
 666       return False;
 667    }
 668    else if (gc->isDirect) {
 669       return True;
 670    }
 671 #ifdef GLX_USE_APPLEGL  /* TODO: indirect on darwin */
 672    return False;
 673 #else
 674    return __glXIsDirect(dpy, gc->xid);
 675 #endif
 676 }
 677
 678 _GLX_PUBLIC GLXPixmap
 679 glXCreateGLXPixmap(Display * dpy, XVisualInfo * vis, Pixmap pixmap)
 680 {
 681 #ifdef GLX_USE_APPLEGL
 682    int screen = vis->screen;
 683    struct glx_screen *const psc = GetGLXScreenConfigs(dpy, screen);
 684    const struct glx_config *config;
 685
 686    config = glx_config_find_visual(psc->visuals, vis->visualid);
 687
 688    if(apple_glx_pixmap_create(dpy, vis->screen, pixmap, config))
 689       return None;
 690
 691    return pixmap;
 692 #else
 693    xGLXCreateGLXPixmapReq *req;
 694    struct glx_drawable *glxDraw;
 695    GLXPixmap xid;
 696    CARD8 opcode;
 697
 698 #if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
 699    struct glx_display *const priv = __glXInitialize(dpy);
 700
 701    if (priv == NULL)
 702       return None;
 703 #endif
 704
 705    opcode = __glXSetupForCommand(dpy);
 706    if (!opcode) {
 707       return None;
 708    }
 709
 710    glxDraw = malloc(sizeof(*glxDraw));
 711    if (!glxDraw)
 712       return None;
 713
 714    /* Send the glXCreateGLXPixmap request */
 715    LockDisplay(dpy);
 716    GetReq(GLXCreateGLXPixmap, req);
 717    req->reqType = opcode;
 718    req->glxCode = X_GLXCreateGLXPixmap;
 719    req->screen = vis->screen;
 720    req->visual = vis->visualid;
 721    req->pixmap = pixmap;
 722    req->glxpixmap = xid = XAllocID(dpy);
 723    UnlockDisplay(dpy);
 724    SyncHandle();
 725
 726    if (InitGLXDrawable(dpy, glxDraw, pixmap, req->glxpixmap)) {
 727       free(glxDraw);
 728       return None;
 729    }
 730
 731 #if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
 732    do {
 733       /* FIXME: Maybe delay __DRIdrawable creation until the drawable
 734        * is actually bound to a context... */
 735
 736       __GLXDRIdrawable *pdraw;
 737       struct glx_screen *psc;
 738       struct glx_config *config;
 739
 740       psc = priv->screens[vis->screen];
 741       if (psc->driScreen == NULL)
 742          return xid;
 743
 744       config = glx_config_find_visual(psc->visuals, vis->visualid);
 745       pdraw = psc->driScreen->createDrawable(psc, pixmap, xid, config);
 746       if (pdraw == NULL) {
 747          fprintf(stderr, "failed to create pixmap\n");
 748          xid = None;
 749          break;
 750       }
 751
 752       if (__glxHashInsert(priv->drawHash, xid, pdraw)) {
 753          (*pdraw->destroyDrawable) (pdraw);
 754          xid = None;
 755          break;
 756       }
 757    } while (0);
 758
 759    if (xid == None) {
 760       xGLXDestroyGLXPixmapReq *dreq;
 761       LockDisplay(dpy);
 762       GetReq(GLXDestroyGLXPixmap, dreq);
 763       dreq->reqType = opcode;
 764       dreq->glxCode = X_GLXDestroyGLXPixmap;
 765       dreq->glxpixmap = xid;
 766       UnlockDisplay(dpy);
 767       SyncHandle();
 768    }
 769 #endif
 770
 771    return xid;
 772 #endif
 773 }
 774
 775 /*
 776 ** Destroy the named pixmap
 777 */
 778 _GLX_PUBLIC void
 779 glXDestroyGLXPixmap(Display * dpy, GLXPixmap glxpixmap)
 780 {
 781 #ifdef GLX_USE_APPLEGL
 782    if(apple_glx_pixmap_destroy(dpy, glxpixmap))
 783       __glXSendError(dpy, GLXBadPixmap, glxpixmap, X_GLXDestroyPixmap, false);
 784 #else
 785    xGLXDestroyGLXPixmapReq *req;
 786    CARD8 opcode;
 787
 788    opcode = __glXSetupForCommand(dpy);
 789    if (!opcode) {
 790       return;
 791    }
 792
 793    /* Send the glXDestroyGLXPixmap request */
 794    LockDisplay(dpy);
 795    GetReq(GLXDestroyGLXPixmap, req);
 796    req->reqType = opcode;
 797    req->glxCode = X_GLXDestroyGLXPixmap;
 798    req->glxpixmap = glxpixmap;
 799    UnlockDisplay(dpy);
 800    SyncHandle();
 801
 802    DestroyGLXDrawable(dpy, glxpixmap);
 803
 804 #if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
 805    {
 806       struct glx_display *const priv = __glXInitialize(dpy);
 807       __GLXDRIdrawable *pdraw = GetGLXDRIDrawable(dpy, glxpixmap);
 808
 809       if (priv != NULL && pdraw != NULL) {
 810          (*pdraw->destroyDrawable) (pdraw);
 811          __glxHashDelete(priv->drawHash, glxpixmap);
 812       }
 813    }
 814 #endif
 815 #endif /* GLX_USE_APPLEGL */
 816 }
 817
 818 _GLX_PUBLIC void
 819 glXSwapBuffers(Display * dpy, GLXDrawable drawable)
 820 {
 821 #ifdef GLX_USE_APPLEGL
 822    struct glx_context * gc = __glXGetCurrentContext();
 823    if(gc != &DummyContext && apple_glx_is_current_drawable(dpy, gc->driContext, drawable)) {
 824       apple_glx_swap_buffers(gc->driContext);
 825    } else {
 826       __glXSendError(dpy, GLXBadCurrentWindow, 0, X_GLXSwapBuffers, false);
 827    }
 828 #else
 829    struct glx_context *gc;
 830    GLXContextTag tag;
 831    CARD8 opcode;
 832    xcb_connection_t *c;
 833
 834    gc = __glXGetCurrentContext();
 835
 836 #if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
 837    {
 838       __GLXDRIdrawable *pdraw = GetGLXDRIDrawable(dpy, drawable);
 839
 840       if (pdraw != NULL) {
 841          Bool flush = gc != &dummyContext && drawable == gc->currentDrawable;
 842
 843          (*pdraw->psc->driScreen->swapBuffers)(pdraw, 0, 0, 0, flush);
 844          return;
 845       }
 846    }
 847 #endif
 848
 849    opcode = __glXSetupForCommand(dpy);
 850    if (!opcode) {
 851       return;
 852    }
 853
 854    /*
 855     ** The calling thread may or may not have a current context.  If it
 856     ** does, send the context tag so the server can do a flush.
 857     */
 858    if ((gc != &dummyContext) && (dpy == gc->currentDpy) &&
 859        ((drawable == gc->currentDrawable)
 860         || (drawable == gc->currentReadable))) {
 861       tag = gc->currentContextTag;
 862    }
 863    else {
 864       tag = 0;
 865    }
 866
 867    c = XGetXCBConnection(dpy);
 868    xcb_glx_swap_buffers(c, tag, drawable);
 869    xcb_flush(c);
 870 #endif /* GLX_USE_APPLEGL */
 871 }
 872
 873
 874 /*
 875 ** Return configuration information for the given display, screen and
 876 ** visual combination.
 877 */
 878 _GLX_PUBLIC int
 879 glXGetConfig(Display * dpy, XVisualInfo * vis, int attribute,
 880              int *value_return)
 881 {
 882    struct glx_display *priv;
 883    struct glx_screen *psc;
 884    struct glx_config *config;
 885    int status;
 886
 887    status = GetGLXPrivScreenConfig(dpy, vis->screen, &priv, &psc);
 888    if (status == Success) {
 889       config = glx_config_find_visual(psc->visuals, vis->visualid);
 890
 891       /* Lookup attribute after first finding a match on the visual */
 892       if (config != NULL) {
 893          return glx_config_get(config, attribute, value_return);
 894       }
 895
 896       status = GLX_BAD_VISUAL;
 897    }
 898
 899    /*
 900     ** If we can't find the config for this visual, this visual is not
 901     ** supported by the OpenGL implementation on the server.
 902     */
 903    if ((status == GLX_BAD_VISUAL) && (attribute == GLX_USE_GL)) {
 904       *value_return = False;
 905       status = Success;
 906    }
 907
 908    return status;
 909 }
 910
 911 /************************************************************************/
 912
 913 static void
 914 init_fbconfig_for_chooser(struct glx_config * config,
 915                           GLboolean fbconfig_style_tags)
 916 {
 917    memset(config, 0, sizeof(struct glx_config));
 918    config->visualID = (XID) GLX_DONT_CARE;
 919    config->visualType = GLX_DONT_CARE;
 920
 921    /* glXChooseFBConfig specifies different defaults for these properties than
 922     * glXChooseVisual.
 923     */
 924    if (fbconfig_style_tags) {
 925       config->rgbMode = GL_TRUE;
 926       config->doubleBufferMode = GLX_DONT_CARE;
 927       config->renderType = GLX_RGBA_BIT;
 928    }
 929
 930    config->drawableType = GLX_WINDOW_BIT;
 931    config->visualRating = GLX_DONT_CARE;
 932    config->transparentPixel = GLX_NONE;
 933    config->transparentRed = GLX_DONT_CARE;
 934    config->transparentGreen = GLX_DONT_CARE;
 935    config->transparentBlue = GLX_DONT_CARE;
 936    config->transparentAlpha = GLX_DONT_CARE;
 937    config->transparentIndex = GLX_DONT_CARE;
 938
 939    config->xRenderable = GLX_DONT_CARE;
 940    config->fbconfigID = (GLXFBConfigID) (GLX_DONT_CARE);
 941
 942    config->swapMethod = GLX_DONT_CARE;
 943 }
 944
 945 #define MATCH_DONT_CARE( param )        \
 946   do {                                  \
 947     if ( ((int) a-> param != (int) GLX_DONT_CARE)   \
 948          && (a-> param != b-> param) ) {        \
 949       return False;                             \
 950     }                                           \
 951   } while ( 0 )
 952
 953 #define MATCH_MINIMUM( param )                  \
 954   do {                                          \
 955     if ( ((int) a-> param != (int) GLX_DONT_CARE)       \
 956          && (a-> param > b-> param) ) {         \
 957       return False;                             \
 958     }                                           \
 959   } while ( 0 )
 960
 961 #define MATCH_EXACT( param )                    \
 962   do {                                          \
 963     if ( a-> param != b-> param) {              \
 964       return False;                             \
 965     }                                           \
 966   } while ( 0 )
 967
 968 /* Test that all bits from a are contained in b */
 969 #define MATCH_MASK(param)                       \
 970   do {                                          \
 971     if ( ((int) a-> param != (int) GLX_DONT_CARE)       \
 972          && ((a->param & ~b->param) != 0) ) {   \
 973       return False;                             \
 974     }                                           \
 975   } while (0);
 976
 977 /**
 978  * Determine if two GLXFBConfigs are compatible.
 979  *
 980  * \param a  Application specified config to test.
 981  * \param b  Server specified config to test against \c a.
 982  */
 983 static Bool
 984 fbconfigs_compatible(const struct glx_config * const a,
 985                      const struct glx_config * const b)
 986 {
 987    MATCH_DONT_CARE(doubleBufferMode);
 988    MATCH_DONT_CARE(visualType);
 989    MATCH_DONT_CARE(visualRating);
 990    MATCH_DONT_CARE(xRenderable);
 991    MATCH_DONT_CARE(fbconfigID);
 992    MATCH_DONT_CARE(swapMethod);
 993
 994    MATCH_MINIMUM(rgbBits);
 995    MATCH_MINIMUM(numAuxBuffers);
 996    MATCH_MINIMUM(redBits);
 997    MATCH_MINIMUM(greenBits);
 998    MATCH_MINIMUM(blueBits);
 999    MATCH_MINIMUM(alphaBits);
1000    MATCH_MINIMUM(depthBits);
1001    MATCH_MINIMUM(stencilBits);
1002    MATCH_MINIMUM(accumRedBits);
1003    MATCH_MINIMUM(accumGreenBits);
1004    MATCH_MINIMUM(accumBlueBits);
1005    MATCH_MINIMUM(accumAlphaBits);
1006    MATCH_MINIMUM(sampleBuffers);
1007    MATCH_MINIMUM(maxPbufferWidth);
1008    MATCH_MINIMUM(maxPbufferHeight);
1009    MATCH_MINIMUM(maxPbufferPixels);
1010    MATCH_MINIMUM(samples);
1011
1012    MATCH_DONT_CARE(stereoMode);
1013    MATCH_EXACT(level);
1014
1015    MATCH_MASK(drawableType);
1016    MATCH_MASK(renderType);
1017
1018    /* There is a bug in a few of the XFree86 DDX drivers.  They contain
1019     * visuals with a "transparent type" of 0 when they really mean GLX_NONE.
1020     * Technically speaking, it is a bug in the DDX driver, but there is
1021     * enough of an installed base to work around the problem here.  In any
1022     * case, 0 is not a valid value of the transparent type, so we'll treat 0
1023     * from the app as GLX_DONT_CARE. We'll consider GLX_NONE from the app and
1024     * 0 from the server to be a match to maintain backward compatibility with
1025     * the (broken) drivers.
1026     */
1027
1028    if (a->transparentPixel != (int) GLX_DONT_CARE && a->transparentPixel != 0) {
1029       if (a->transparentPixel == GLX_NONE) {
1030          if (b->transparentPixel != GLX_NONE && b->transparentPixel != 0)
1031             return False;
1032       }
1033       else {
1034          MATCH_EXACT(transparentPixel);
1035       }
1036
1037       switch (a->transparentPixel) {
1038       case GLX_TRANSPARENT_RGB:
1039          MATCH_DONT_CARE(transparentRed);
1040          MATCH_DONT_CARE(transparentGreen);
1041          MATCH_DONT_CARE(transparentBlue);
1042          MATCH_DONT_CARE(transparentAlpha);
1043          break;
1044
1045       case GLX_TRANSPARENT_INDEX:
1046          MATCH_DONT_CARE(transparentIndex);
1047          break;
1048
1049       default:
1050          break;
1051       }
1052    }
1053
1054    return True;
1055 }
1056
1057
1058 /* There's some trickly language in the GLX spec about how this is supposed
1059  * to work.  Basically, if a given component size is either not specified
1060  * or the requested size is zero, it is supposed to act like PERFER_SMALLER.
1061  * Well, that's really hard to do with the code as-is.  This behavior is
1062  * closer to correct, but still not technically right.
1063  */
1064 #define PREFER_LARGER_OR_ZERO(comp)             \
1065   do {                                          \
1066     if ( ((*a)-> comp) != ((*b)-> comp) ) {     \
1067       if ( ((*a)-> comp) == 0 ) {               \
1068         return -1;                              \
1069       }                                         \
1070       else if ( ((*b)-> comp) == 0 ) {          \
1071         return 1;                               \
1072       }                                         \
1073       else {                                    \
1074         return ((*b)-> comp) - ((*a)-> comp) ;  \
1075       }                                         \
1076     }                                           \
1077   } while( 0 )
1078
1079 #define PREFER_LARGER(comp)                     \
1080   do {                                          \
1081     if ( ((*a)-> comp) != ((*b)-> comp) ) {     \
1082       return ((*b)-> comp) - ((*a)-> comp) ;    \
1083     }                                           \
1084   } while( 0 )
1085
1086 #define PREFER_SMALLER(comp)                    \
1087   do {                                          \
1088     if ( ((*a)-> comp) != ((*b)-> comp) ) {     \
1089       return ((*a)-> comp) - ((*b)-> comp) ;    \
1090     }                                           \
1091   } while( 0 )
1092
1093 /**
1094  * Compare two GLXFBConfigs.  This function is intended to be used as the
1095  * compare function passed in to qsort.
1096  *
1097  * \returns If \c a is a "better" config, according to the specification of
1098  *          SGIX_fbconfig, a number less than zero is returned.  If \c b is
1099  *          better, then a number greater than zero is return.  If both are
1100  *          equal, zero is returned.
1101  * \sa qsort, glXChooseVisual, glXChooseFBConfig, glXChooseFBConfigSGIX
1102  */
1103 static int
1104 fbconfig_compare(struct glx_config **a, struct glx_config **b)
1105 {
1106    /* The order of these comparisons must NOT change.  It is defined by
1107     * the GLX 1.4 specification.
1108     */
1109
1110    PREFER_SMALLER(visualSelectGroup);
1111
1112    /* The sort order for the visualRating is GLX_NONE, GLX_SLOW, and
1113     * GLX_NON_CONFORMANT_CONFIG.  It just so happens that this is the
1114     * numerical sort order of the enums (0x8000, 0x8001, and 0x800D).
1115     */
1116    PREFER_SMALLER(visualRating);
1117
1118    /* This isn't quite right.  It is supposed to compare the sum of the
1119     * components the user specifically set minimums for.
1120     */
1121    PREFER_LARGER_OR_ZERO(redBits);
1122    PREFER_LARGER_OR_ZERO(greenBits);
1123    PREFER_LARGER_OR_ZERO(blueBits);
1124    PREFER_LARGER_OR_ZERO(alphaBits);
1125
1126    PREFER_SMALLER(rgbBits);
1127
1128    if (((*a)->doubleBufferMode != (*b)->doubleBufferMode)) {
1129       /* Prefer single-buffer.
1130        */
1131       return (!(*a)->doubleBufferMode) ? -1 : 1;
1132    }
1133
1134    PREFER_SMALLER(numAuxBuffers);
1135
1136    PREFER_SMALLER(sampleBuffers);
1137    PREFER_SMALLER(samples);
1138
1139    PREFER_LARGER_OR_ZERO(depthBits);
1140    PREFER_SMALLER(stencilBits);
1141
1142    /* This isn't quite right.  It is supposed to compare the sum of the
1143     * components the user specifically set minimums for.
1144     */
1145    PREFER_LARGER_OR_ZERO(accumRedBits);
1146    PREFER_LARGER_OR_ZERO(accumGreenBits);
1147    PREFER_LARGER_OR_ZERO(accumBlueBits);
1148    PREFER_LARGER_OR_ZERO(accumAlphaBits);
1149
1150    PREFER_SMALLER(visualType);
1151
1152    /* None of the pbuffer or fbconfig specs say that this comparison needs
1153     * to happen at all, but it seems like it should.
1154     */
1155    PREFER_LARGER(maxPbufferWidth);
1156    PREFER_LARGER(maxPbufferHeight);
1157    PREFER_LARGER(maxPbufferPixels);
1158
1159    return 0;
1160 }
1161
1162
1163 /**
1164  * Selects and sorts a subset of the supplied configs based on the attributes.
1165  * This function forms to basis of \c glXChooseFBConfig and
1166  * \c glXChooseFBConfigSGIX.
1167  *
1168  * \param configs   Array of pointers to possible configs.  The elements of
1169  *                  this array that do not meet the criteria will be set to
1170  *                  NULL.  The remaining elements will be sorted according to
1171  *                  the various visual / FBConfig selection rules.
1172  * \param num_configs  Number of elements in the \c configs array.
1173  * \param attribList   Attributes used select from \c configs.  This array is
1174  *                     terminated by a \c None tag.  The array is of the form
1175  *                     expected by \c glXChooseFBConfig (where every tag has a
1176  *                     value).
1177  * \returns The number of valid elements left in \c configs.
1178  *
1179  * \sa glXChooseFBConfig, glXChooseFBConfigSGIX
1180  */
1181 static int
1182 choose_fbconfig(struct glx_config ** configs, int num_configs,
1183               const int *attribList)
1184 {
1185    struct glx_config test_config;
1186    int base;
1187    int i;
1188
1189    /* This is a fairly direct implementation of the selection method
1190     * described by GLX_SGIX_fbconfig.  Start by culling out all the
1191     * configs that are not compatible with the selected parameter
1192     * list.
1193     */
1194
1195    init_fbconfig_for_chooser(&test_config, GL_TRUE);
1196    __glXInitializeVisualConfigFromTags(&test_config, 512,
1197                                        (const INT32 *) attribList,
1198                                        GL_TRUE, GL_TRUE);
1199
1200    base = 0;
1201    for (i = 0; i < num_configs; i++) {
1202       if (fbconfigs_compatible(&test_config, configs[i])) {
1203          configs[base] = configs[i];
1204          base++;
1205       }
1206    }
1207
1208    if (base == 0) {
1209       return 0;
1210    }
1211
1212    if (base < num_configs) {
1213       (void) memset(&configs[base], 0, sizeof(void *) * (num_configs - base));
1214    }
1215
1216    /* After the incompatible configs are removed, the resulting
1217     * list is sorted according to the rules set out in the various
1218     * specifications.
1219     */
1220
1221    qsort(configs, base, sizeof(struct glx_config *),
1222          (int (*)(const void *, const void *)) fbconfig_compare);
1223    return base;
1224 }
1225
1226
1227
1228
1229 /*
1230 ** Return the visual that best matches the template.  Return None if no
1231 ** visual matches the template.
1232 */
1233 _GLX_PUBLIC XVisualInfo *
1234 glXChooseVisual(Display * dpy, int screen, int *attribList)
1235 {
1236    XVisualInfo *visualList = NULL;
1237    struct glx_display *priv;
1238    struct glx_screen *psc;
1239    struct glx_config test_config;
1240    struct glx_config *config;
1241    struct glx_config *best_config = NULL;
1242
1243    /*
1244     ** Get a list of all visuals, return if list is empty
1245     */
1246    if (GetGLXPrivScreenConfig(dpy, screen, &priv, &psc) != Success) {
1247       return None;
1248    }
1249
1250
1251    /*
1252     ** Build a template from the defaults and the attribute list
1253     ** Free visual list and return if an unexpected token is encountered
1254     */
1255    init_fbconfig_for_chooser(&test_config, GL_FALSE);
1256    __glXInitializeVisualConfigFromTags(&test_config, 512,
1257                                        (const INT32 *) attribList,
1258                                        GL_TRUE, GL_FALSE);
1259
1260    /*
1261     ** Eliminate visuals that don't meet minimum requirements
1262     ** Compute a score for those that do
1263     ** Remember which visual, if any, got the highest score
1264     ** If no visual is acceptable, return None
1265     ** Otherwise, create an XVisualInfo list with just the selected X visual
1266     ** and return this.
1267     */
1268    for (config = psc->visuals; config != NULL; config = config->next) {
1269       if (fbconfigs_compatible(&test_config, config)
1270           && ((best_config == NULL) ||
1271               (fbconfig_compare (&config, &best_config) < 0))) {
1272          XVisualInfo visualTemplate;
1273          XVisualInfo *newList;
1274          int i;
1275
1276          visualTemplate.screen = screen;
1277          visualTemplate.visualid = config->visualID;
1278          newList = XGetVisualInfo(dpy, VisualScreenMask | VisualIDMask,
1279                                   &visualTemplate, &i);
1280
1281          if (newList) {
1282             free(visualList);
1283             visualList = newList;
1284             best_config = config;
1285          }
1286       }
1287    }
1288
1289 #ifdef GLX_USE_APPLEGL
1290    if(visualList && getenv("LIBGL_DUMP_VISUALID")) {
1291       printf("visualid 0x%lx\n", visualList[0].visualid);
1292    }
1293 #endif
1294
1295    return visualList;
1296 }
1297
1298
1299 _GLX_PUBLIC const char *
1300 glXQueryExtensionsString(Display * dpy, int screen)
1301 {
1302    struct glx_screen *psc;
1303    struct glx_display *priv;
1304
1305    if (GetGLXPrivScreenConfig(dpy, screen, &priv, &psc) != Success) {
1306       return NULL;
1307    }
1308
1309    if (!psc->effectiveGLXexts) {
1310       if (!psc->serverGLXexts) {
1311          psc->serverGLXexts =
1312             __glXQueryServerString(dpy, priv->majorOpcode, screen,
1313                                    GLX_EXTENSIONS);
1314       }
1315
1316       __glXCalculateUsableExtensions(psc,
1317 #if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
1318                                      (psc->driScreen != NULL),
1319 #else
1320                                      GL_FALSE,
1321 #endif
1322                                      priv->minorVersion);
1323    }
1324
1325    return psc->effectiveGLXexts;
1326 }
1327
1328 _GLX_PUBLIC const char *
1329 glXGetClientString(Display * dpy, int name)
1330 {
1331    (void) dpy;
1332
1333    switch (name) {
1334    case GLX_VENDOR:
1335       return (__glXGLXClientVendorName);
1336    case GLX_VERSION:
1337       return (__glXGLXClientVersion);
1338    case GLX_EXTENSIONS:
1339       return (__glXGetClientExtensions());
1340    default:
1341       return NULL;
1342    }
1343 }
1344
1345 _GLX_PUBLIC const char *
1346 glXQueryServerString(Display * dpy, int screen, int name)
1347 {
1348    struct glx_screen *psc;
1349    struct glx_display *priv;
1350    const char **str;
1351
1352
1353    if (GetGLXPrivScreenConfig(dpy, screen, &priv, &psc) != Success) {
1354       return NULL;
1355    }
1356
1357    switch (name) {
1358    case GLX_VENDOR:
1359       str = &priv->serverGLXvendor;
1360       break;
1361    case GLX_VERSION:
1362       str = &priv->serverGLXversion;
1363       break;
1364    case GLX_EXTENSIONS:
1365       str = &psc->serverGLXexts;
1366       break;
1367    default:
1368       return NULL;
1369    }
1370
1371    if (*str == NULL) {
1372       *str = __glXQueryServerString(dpy, priv->majorOpcode, screen, name);
1373    }
1374
1375    return *str;
1376 }
1377
1378
1379 /*
1380 ** EXT_import_context
1381 */
1382
1383 _GLX_PUBLIC Display *
1384 glXGetCurrentDisplay(void)
1385 {
1386    struct glx_context *gc = __glXGetCurrentContext();
1387    if (gc == &dummyContext)
1388       return NULL;
1389    return gc->currentDpy;
1390 }
1391
1392 _GLX_PUBLIC
1393 GLX_ALIAS(Display *, glXGetCurrentDisplayEXT, (void), (),
1394           glXGetCurrentDisplay)
1395
1396 #ifndef GLX_USE_APPLEGL
1397 _GLX_PUBLIC GLXContext
1398 glXImportContextEXT(Display *dpy, GLXContextID contextID)
1399 {
1400    struct glx_display *priv = __glXInitialize(dpy);
1401    struct glx_screen *psc = NULL;
1402    xGLXQueryContextReply reply;
1403    CARD8 opcode;
1404    struct glx_context *ctx;
1405
1406    /* This GLX implementation knows about 5 different properties, so
1407     * allow the server to send us one of each.
1408     */
1409    int propList[5 * 2], *pProp, nPropListBytes;
1410    int numProps;
1411    int i, renderType;
1412    XID share;
1413    struct glx_config *mode;
1414    uint32_t fbconfigID = 0;
1415    uint32_t visualID = 0;
1416    uint32_t screen = 0;
1417    Bool got_screen = False;
1418
1419    if (priv == NULL)
1420       return NULL;
1421
1422    /* The GLX_EXT_import_context spec says:
1423     *
1424     *     "If <contextID> does not refer to a valid context, then a BadContext
1425     *     error is generated; if <contextID> refers to direct rendering
1426     *     context then no error is generated but glXImportContextEXT returns
1427     *     NULL."
1428     *
1429     * If contextID is None, generate BadContext on the client-side.  Other
1430     * sorts of invalid contexts will be detected by the server in the
1431     * __glXIsDirect call.
1432     */
1433    if (contextID == None) {
1434       __glXSendError(dpy, GLXBadContext, contextID, X_GLXIsDirect, false);
1435       return NULL;
1436    }
1437
1438    if (__glXIsDirect(dpy, contextID))
1439       return NULL;
1440
1441    opcode = __glXSetupForCommand(dpy);
1442    if (!opcode)
1443       return 0;
1444
1445    /* Send the glXQueryContextInfoEXT request */
1446    LockDisplay(dpy);
1447
1448    if (priv->majorVersion > 1 || priv->minorVersion >= 3) {
1449       xGLXQueryContextReq *req;
1450
1451       GetReq(GLXQueryContext, req);
1452
1453       req->reqType = opcode;
1454       req->glxCode = X_GLXQueryContext;
1455       req->context = contextID;
1456    }
1457    else {
1458       xGLXVendorPrivateReq *vpreq;
1459       xGLXQueryContextInfoEXTReq *req;
1460
1461       GetReqExtra(GLXVendorPrivate,
1462                   sz_xGLXQueryContextInfoEXTReq - sz_xGLXVendorPrivateReq,
1463                   vpreq);
1464       req = (xGLXQueryContextInfoEXTReq *) vpreq;
1465       req->reqType = opcode;
1466       req->glxCode = X_GLXVendorPrivateWithReply;
1467       req->vendorCode = X_GLXvop_QueryContextInfoEXT;
1468       req->context = contextID;
1469    }
1470
1471    _XReply(dpy, (xReply *) & reply, 0, False);
1472
1473    if (reply.n <= __GLX_MAX_CONTEXT_PROPS)
1474       nPropListBytes = reply.n * 2 * sizeof propList[0];
1475    else
1476       nPropListBytes = 0;
1477    _XRead(dpy, (char *) propList, nPropListBytes);
1478    UnlockDisplay(dpy);
1479    SyncHandle();
1480
1481    numProps = nPropListBytes / (2 * sizeof(propList[0]));
1482    share = None;
1483    mode = NULL;
1484    renderType = GLX_RGBA_TYPE; /* By default, assume RGBA context */
1485    pProp = propList;
1486
1487    for (i = 0, pProp = propList; i < numProps; i++, pProp += 2)
1488       switch (pProp[0]) {
1489       case GLX_SCREEN:
1490          screen = pProp[1];
1491          got_screen = True;
1492          break;
1493       case GLX_SHARE_CONTEXT_EXT:
1494          share = pProp[1];
1495          break;
1496       case GLX_VISUAL_ID_EXT:
1497          visualID = pProp[1];
1498          break;
1499       case GLX_FBCONFIG_ID:
1500          fbconfigID = pProp[1];
1501          break;
1502       case GLX_RENDER_TYPE:
1503          renderType = pProp[1];
1504          break;
1505       }
1506
1507    if (!got_screen)
1508       return NULL;
1509
1510    psc = GetGLXScreenConfigs(dpy, screen);
1511    if (psc == NULL)
1512       return NULL;
1513
1514    if (fbconfigID != 0) {
1515       mode = glx_config_find_fbconfig(psc->configs, fbconfigID);
1516    } else if (visualID != 0) {
1517       mode = glx_config_find_visual(psc->visuals, visualID);
1518    }
1519
1520    if (mode == NULL)
1521       return NULL;
1522
1523    ctx = indirect_create_context(psc, mode, NULL, renderType);
1524    if (ctx == NULL)
1525       return NULL;
1526
1527    ctx->xid = contextID;
1528    ctx->imported = GL_TRUE;
1529    ctx->share_xid = share;
1530
1531    return (GLXContext) ctx;
1532 }
1533
1534 #endif
1535
1536 _GLX_PUBLIC int
1537 glXQueryContext(Display * dpy, GLXContext ctx_user, int attribute, int *value)
1538 {
1539    struct glx_context *ctx = (struct glx_context *) ctx_user;
1540
1541    switch (attribute) {
1542       case GLX_SHARE_CONTEXT_EXT:
1543       *value = ctx->share_xid;
1544       break;
1545    case GLX_VISUAL_ID_EXT:
1546       *value = ctx->config ? ctx->config->visualID : None;
1547       break;
1548    case GLX_SCREEN:
1549       *value = ctx->screen;
1550       break;
1551    case GLX_FBCONFIG_ID:
1552       *value = ctx->config ? ctx->config->fbconfigID : None;
1553       break;
1554    case GLX_RENDER_TYPE:
1555       *value = ctx->renderType;
1556       break;
1557    default:
1558       return GLX_BAD_ATTRIBUTE;
1559    }
1560    return Success;
1561 }
1562
1563 _GLX_PUBLIC
1564 GLX_ALIAS(int, glXQueryContextInfoEXT,
1565           (Display * dpy, GLXContext ctx, int attribute, int *value),
1566           (dpy, ctx, attribute, value), glXQueryContext)
1567
1568 _GLX_PUBLIC GLXContextID glXGetContextIDEXT(const GLXContext ctx_user)
1569 {
1570    struct glx_context *ctx = (struct glx_context *) ctx_user;
1571
1572    return (ctx == NULL) ? None : ctx->xid;
1573 }
1574
1575 _GLX_PUBLIC void
1576 glXFreeContextEXT(Display *dpy, GLXContext ctx)
1577 {
1578    struct glx_context *gc = (struct glx_context *) ctx;
1579
1580    if (gc == NULL || gc->xid == None)
1581       return;
1582
1583    /* The GLX_EXT_import_context spec says:
1584     *
1585     *     "glXFreeContext does not free the server-side context information or
1586     *     the XID associated with the server-side context."
1587     *
1588     * Don't send any protocol.  Just destroy the client-side tracking of the
1589     * context.  Also, only release the context structure if it's not current.
1590     */
1591    __glXLock();
1592    if (gc->currentDpy) {
1593       gc->xid = None;
1594    } else {
1595       gc->vtable->destroy(gc);
1596    }
1597    __glXUnlock();
1598 }
1599
1600 _GLX_PUBLIC GLXFBConfig *
1601 glXChooseFBConfig(Display * dpy, int screen,
1602                   const int *attribList, int *nitems)
1603 {
1604    struct glx_config **config_list;
1605    int list_size;
1606
1607
1608    config_list = (struct glx_config **)
1609       glXGetFBConfigs(dpy, screen, &list_size);
1610
1611    if ((config_list != NULL) && (list_size > 0) && (attribList != NULL)) {
1612       list_size = choose_fbconfig(config_list, list_size, attribList);
1613       if (list_size == 0) {
1614          free(config_list);
1615          config_list = NULL;
1616       }
1617    }
1618
1619    *nitems = list_size;
1620    return (GLXFBConfig *) config_list;
1621 }
1622
1623
1624 _GLX_PUBLIC GLXContext
1625 glXCreateNewContext(Display * dpy, GLXFBConfig fbconfig,
1626                     int renderType, GLXContext shareList, Bool allowDirect)
1627 {
1628    struct glx_config *config = (struct glx_config *) fbconfig;
1629    struct glx_config **config_list;
1630    int list_size;
1631    unsigned i;
1632
1633    if (!config) {
1634        __glXSendError(dpy, GLXBadFBConfig, 0, X_GLXCreateNewContext, false);
1635        return NULL;
1636    }
1637
1638    config_list = (struct glx_config **)
1639       glXGetFBConfigs(dpy, config->screen, &list_size);
1640
1641    for (i = 0; i < list_size; i++) {
1642        if (config_list[i] == config)
1643            break;
1644    }
1645    free(config_list);
1646
1647    if (i == list_size) {
1648        __glXSendError(dpy, GLXBadFBConfig, 0, X_GLXCreateNewContext, false);
1649        return NULL;
1650    }
1651
1652    return CreateContext(dpy, config->fbconfigID, config, shareList,
1653                         allowDirect, X_GLXCreateNewContext, renderType,
1654                         config->screen);
1655 }
1656
1657
1658 _GLX_PUBLIC GLXDrawable
1659 glXGetCurrentReadDrawable(void)
1660 {
1661    struct glx_context *gc = __glXGetCurrentContext();
1662
1663    return gc->currentReadable;
1664 }
1665
1666
1667 _GLX_PUBLIC GLXFBConfig *
1668 glXGetFBConfigs(Display * dpy, int screen, int *nelements)
1669 {
1670    struct glx_display *priv = __glXInitialize(dpy);
1671    struct glx_config **config_list = NULL;
1672    struct glx_config *config;
1673    unsigned num_configs = 0;
1674    int i;
1675
1676    *nelements = 0;
1677    if (priv && (priv->screens != NULL)
1678        && (screen >= 0) && (screen < ScreenCount(dpy))
1679        && (priv->screens[screen]->configs != NULL)
1680        && (priv->screens[screen]->configs->fbconfigID
1681            != (int) GLX_DONT_CARE)) {
1682
1683       for (config = priv->screens[screen]->configs; config != NULL;
1684            config = config->next) {
1685          if (config->fbconfigID != (int) GLX_DONT_CARE) {
1686             num_configs++;
1687          }
1688       }
1689
1690       config_list = malloc(num_configs * sizeof *config_list);
1691       if (config_list != NULL) {
1692          *nelements = num_configs;
1693          i = 0;
1694          for (config = priv->screens[screen]->configs; config != NULL;
1695               config = config->next) {
1696             if (config->fbconfigID != (int) GLX_DONT_CARE) {
1697                config_list[i] = config;
1698                i++;
1699             }
1700          }
1701       }
1702    }
1703
1704    return (GLXFBConfig *) config_list;
1705 }
1706
1707
1708 _GLX_PUBLIC int
1709 glXGetFBConfigAttrib(Display * dpy, GLXFBConfig fbconfig,
1710                      int attribute, int *value)
1711 {
1712    struct glx_config *config = ValidateGLXFBConfig(dpy, fbconfig);
1713
1714    if (config == NULL)
1715       return GLXBadFBConfig;
1716
1717    return glx_config_get(config, attribute, value);
1718 }
1719
1720
1721 _GLX_PUBLIC XVisualInfo *
1722 glXGetVisualFromFBConfig(Display * dpy, GLXFBConfig fbconfig)
1723 {
1724    XVisualInfo visualTemplate;
1725    struct glx_config *config = (struct glx_config *) fbconfig;
1726    int count;
1727
1728    /*
1729     ** Get a list of all visuals, return if list is empty
1730     */
1731    visualTemplate.visualid = config->visualID;
1732    return XGetVisualInfo(dpy, VisualIDMask, &visualTemplate, &count);
1733 }
1734
1735 #ifndef GLX_USE_APPLEGL
1736 /*
1737 ** GLX_SGI_swap_control
1738 */
1739 static int
1740 __glXSwapIntervalSGI(int interval)
1741 {
1742    xGLXVendorPrivateReq *req;
1743    struct glx_context *gc = __glXGetCurrentContext();
1744    struct glx_screen *psc;
1745    Display *dpy;
1746    CARD32 *interval_ptr;
1747    CARD8 opcode;
1748
1749    if (gc == &dummyContext) {
1750       return GLX_BAD_CONTEXT;
1751    }
1752
1753    if (interval <= 0) {
1754       return GLX_BAD_VALUE;
1755    }
1756
1757    psc = GetGLXScreenConfigs( gc->currentDpy, gc->screen);
1758
1759 #ifdef GLX_DIRECT_RENDERING
1760    if (gc->isDirect && psc && psc->driScreen &&
1761           psc->driScreen->setSwapInterval) {
1762       __GLXDRIdrawable *pdraw =
1763          GetGLXDRIDrawable(gc->currentDpy, gc->currentDrawable);
1764       /* Simply ignore the command if the GLX drawable has been destroyed but
1765        * the context is still bound.
1766        */
1767       if (pdraw)
1768          psc->driScreen->setSwapInterval(pdraw, interval);
1769       return 0;
1770    }
1771 #endif
1772
1773    dpy = gc->currentDpy;
1774    opcode = __glXSetupForCommand(dpy);
1775    if (!opcode) {
1776       return 0;
1777    }
1778
1779    /* Send the glXSwapIntervalSGI request */
1780    LockDisplay(dpy);
1781    GetReqExtra(GLXVendorPrivate, sizeof(CARD32), req);
1782    req->reqType = opcode;
1783    req->glxCode = X_GLXVendorPrivate;
1784    req->vendorCode = X_GLXvop_SwapIntervalSGI;
1785    req->contextTag = gc->currentContextTag;
1786
1787    interval_ptr = (CARD32 *) (req + 1);
1788    *interval_ptr = interval;
1789
1790    UnlockDisplay(dpy);
1791    SyncHandle();
1792    XFlush(dpy);
1793
1794    return 0;
1795 }
1796
1797
1798 /*
1799 ** GLX_MESA_swap_control
1800 */
1801 static int
1802 __glXSwapIntervalMESA(unsigned int interval)
1803 {
1804 #ifdef GLX_DIRECT_RENDERING
1805    struct glx_context *gc = __glXGetCurrentContext();
1806
1807    if (gc != &dummyContext && gc->isDirect) {
1808       struct glx_screen *psc;
1809
1810       psc = GetGLXScreenConfigs( gc->currentDpy, gc->screen);
1811       if (psc && psc->driScreen && psc->driScreen->setSwapInterval) {
1812          __GLXDRIdrawable *pdraw =
1813             GetGLXDRIDrawable(gc->currentDpy, gc->currentDrawable);
1814
1815          /* Simply ignore the command if the GLX drawable has been destroyed but
1816           * the context is still bound.
1817           */
1818          if (!pdraw)
1819             return 0;
1820
1821          return psc->driScreen->setSwapInterval(pdraw, interval);
1822       }
1823    }
1824 #endif
1825
1826    return GLX_BAD_CONTEXT;
1827 }
1828
1829
1830 static int
1831 __glXGetSwapIntervalMESA(void)
1832 {
1833 #ifdef GLX_DIRECT_RENDERING
1834    struct glx_context *gc = __glXGetCurrentContext();
1835
1836    if (gc != &dummyContext && gc->isDirect) {
1837       struct glx_screen *psc;
1838
1839       psc = GetGLXScreenConfigs( gc->currentDpy, gc->screen);
1840       if (psc && psc->driScreen && psc->driScreen->getSwapInterval) {
1841          __GLXDRIdrawable *pdraw =
1842             GetGLXDRIDrawable(gc->currentDpy, gc->currentDrawable);
1843          if (pdraw)
1844             return psc->driScreen->getSwapInterval(pdraw);
1845       }
1846    }
1847 #endif
1848
1849    return 0;
1850 }
1851
1852
1853 /*
1854 ** GLX_SGI_video_sync
1855 */
1856 static int
1857 __glXGetVideoSyncSGI(unsigned int *count)
1858 {
1859    int64_t ust, msc, sbc;
1860    int ret;
1861    struct glx_context *gc = __glXGetCurrentContext();
1862    struct glx_screen *psc;
1863 #ifdef GLX_DIRECT_RENDERING
1864    __GLXDRIdrawable *pdraw;
1865 #endif
1866
1867    if (gc == &dummyContext)
1868       return GLX_BAD_CONTEXT;
1869
1870 #ifdef GLX_DIRECT_RENDERING
1871    if (!gc->isDirect)
1872       return GLX_BAD_CONTEXT;
1873 #endif
1874
1875    psc = GetGLXScreenConfigs(gc->currentDpy, gc->screen);
1876 #ifdef GLX_DIRECT_RENDERING
1877    pdraw = GetGLXDRIDrawable(gc->currentDpy, gc->currentDrawable);
1878 #endif
1879
1880    /* FIXME: Looking at the GLX_SGI_video_sync spec in the extension registry,
1881     * FIXME: there should be a GLX encoding for this call.  I can find no
1882     * FIXME: documentation for the GLX encoding.
1883     */
1884 #ifdef GLX_DIRECT_RENDERING
1885    if (psc && psc->driScreen && psc->driScreen->getDrawableMSC) {
1886       ret = psc->driScreen->getDrawableMSC(psc, pdraw, &ust, &msc, &sbc);
1887       *count = (unsigned) msc;
1888       return (ret == True) ? 0 : GLX_BAD_CONTEXT;
1889    }
1890 #endif
1891
1892    return GLX_BAD_CONTEXT;
1893 }
1894
1895 static int
1896 __glXWaitVideoSyncSGI(int divisor, int remainder, unsigned int *count)
1897 {
1898    struct glx_context *gc = __glXGetCurrentContext();
1899    struct glx_screen *psc;
1900 #ifdef GLX_DIRECT_RENDERING
1901    __GLXDRIdrawable *pdraw;
1902 #endif
1903    int64_t ust, msc, sbc;
1904    int ret;
1905
1906    if (divisor <= 0 || remainder < 0)
1907       return GLX_BAD_VALUE;
1908
1909    if (gc == &dummyContext)
1910       return GLX_BAD_CONTEXT;
1911
1912 #ifdef GLX_DIRECT_RENDERING
1913    if (!gc->isDirect)
1914       return GLX_BAD_CONTEXT;
1915 #endif
1916
1917    psc = GetGLXScreenConfigs( gc->currentDpy, gc->screen);
1918 #ifdef GLX_DIRECT_RENDERING
1919    pdraw = GetGLXDRIDrawable(gc->currentDpy, gc->currentDrawable);
1920 #endif
1921
1922 #ifdef GLX_DIRECT_RENDERING
1923    if (psc && psc->driScreen && psc->driScreen->waitForMSC) {
1924       ret = psc->driScreen->waitForMSC(pdraw, 0, divisor, remainder, &ust, &msc,
1925                                        &sbc);
1926       *count = (unsigned) msc;
1927       return (ret == True) ? 0 : GLX_BAD_CONTEXT;
1928    }
1929 #endif
1930
1931    return GLX_BAD_CONTEXT;
1932 }
1933
1934 #endif /* GLX_USE_APPLEGL */
1935
1936 /*
1937 ** GLX_SGIX_fbconfig
1938 ** Many of these functions are aliased to GLX 1.3 entry points in the
1939 ** GLX_functions table.
1940 */
1941
1942 _GLX_PUBLIC
1943 GLX_ALIAS(int, glXGetFBConfigAttribSGIX,
1944           (Display * dpy, GLXFBConfigSGIX config, int attribute, int *value),
1945           (dpy, config, attribute, value), glXGetFBConfigAttrib)
1946
1947 _GLX_PUBLIC GLX_ALIAS(GLXFBConfigSGIX *, glXChooseFBConfigSGIX,
1948                  (Display * dpy, int screen, int *attrib_list,
1949                   int *nelements), (dpy, screen, attrib_list, nelements),
1950                  glXChooseFBConfig)
1951
1952 _GLX_PUBLIC GLX_ALIAS(XVisualInfo *, glXGetVisualFromFBConfigSGIX,
1953                  (Display * dpy, GLXFBConfigSGIX config),
1954                  (dpy, config), glXGetVisualFromFBConfig)
1955
1956 _GLX_PUBLIC GLXPixmap
1957 glXCreateGLXPixmapWithConfigSGIX(Display * dpy,
1958                                  GLXFBConfigSGIX fbconfig,
1959                                  Pixmap pixmap)
1960 {
1961 #ifndef GLX_USE_APPLEGL
1962    xGLXVendorPrivateWithReplyReq *vpreq;
1963    xGLXCreateGLXPixmapWithConfigSGIXReq *req;
1964    GLXPixmap xid = None;
1965    CARD8 opcode;
1966    struct glx_screen *psc;
1967 #endif
1968    struct glx_config *config = (struct glx_config *) fbconfig;
1969
1970
1971    if ((dpy == NULL) || (config == NULL)) {
1972       return None;
1973    }
1974 #ifdef GLX_USE_APPLEGL
1975    if(apple_glx_pixmap_create(dpy, config->screen, pixmap, config))
1976       return None;
1977    return pixmap;
1978 #else
1979
1980    psc = GetGLXScreenConfigs(dpy, config->screen);
1981    if ((psc != NULL)
1982        && __glXExtensionBitIsEnabled(psc, SGIX_fbconfig_bit)) {
1983       opcode = __glXSetupForCommand(dpy);
1984       if (!opcode) {
1985          return None;
1986       }
1987
1988       /* Send the glXCreateGLXPixmapWithConfigSGIX request */
1989       LockDisplay(dpy);
1990       GetReqExtra(GLXVendorPrivateWithReply,
1991                   sz_xGLXCreateGLXPixmapWithConfigSGIXReq -
1992                   sz_xGLXVendorPrivateWithReplyReq, vpreq);
1993       req = (xGLXCreateGLXPixmapWithConfigSGIXReq *) vpreq;
1994       req->reqType = opcode;
1995       req->glxCode = X_GLXVendorPrivateWithReply;
1996       req->vendorCode = X_GLXvop_CreateGLXPixmapWithConfigSGIX;
1997       req->screen = config->screen;
1998       req->fbconfig = config->fbconfigID;
1999       req->pixmap = pixmap;
2000       req->glxpixmap = xid = XAllocID(dpy);
2001       UnlockDisplay(dpy);
2002       SyncHandle();
2003    }
2004
2005    return xid;
2006 #endif
2007 }
2008
2009 _GLX_PUBLIC GLXContext
2010 glXCreateContextWithConfigSGIX(Display * dpy,
2011                                GLXFBConfigSGIX fbconfig, int renderType,
2012                                GLXContext shareList, Bool allowDirect)
2013 {
2014    GLXContext gc = NULL;
2015    struct glx_config *config = (struct glx_config *) fbconfig;
2016    struct glx_screen *psc;
2017
2018
2019    if ((dpy == NULL) || (config == NULL)) {
2020       return None;
2021    }
2022
2023    psc = GetGLXScreenConfigs(dpy, config->screen);
2024    if ((psc != NULL)
2025        && __glXExtensionBitIsEnabled(psc, SGIX_fbconfig_bit)) {
2026       gc = CreateContext(dpy, config->fbconfigID, config, shareList,
2027                          allowDirect,
2028                          X_GLXvop_CreateContextWithConfigSGIX, renderType,
2029                          config->screen);
2030    }
2031
2032    return gc;
2033 }
2034
2035
2036 _GLX_PUBLIC GLXFBConfigSGIX
2037 glXGetFBConfigFromVisualSGIX(Display * dpy, XVisualInfo * vis)
2038 {
2039    struct glx_display *priv;
2040    struct glx_screen *psc = NULL;
2041
2042    if ((GetGLXPrivScreenConfig(dpy, vis->screen, &priv, &psc) == Success)
2043        && __glXExtensionBitIsEnabled(psc, SGIX_fbconfig_bit)
2044        && (psc->configs->fbconfigID != (int) GLX_DONT_CARE)) {
2045       return (GLXFBConfigSGIX) glx_config_find_visual(psc->configs,
2046                                                       vis->visualid);
2047    }
2048
2049    return NULL;
2050 }
2051
2052 #ifndef GLX_USE_APPLEGL
2053 /*
2054 ** GLX_SGIX_swap_group
2055 */
2056 static void
2057 __glXJoinSwapGroupSGIX(Display * dpy, GLXDrawable drawable,
2058                        GLXDrawable member)
2059 {
2060    (void) dpy;
2061    (void) drawable;
2062    (void) member;
2063 }
2064
2065
2066 /*
2067 ** GLX_SGIX_swap_barrier
2068 */
2069 static void
2070 __glXBindSwapBarrierSGIX(Display * dpy, GLXDrawable drawable, int barrier)
2071 {
2072    (void) dpy;
2073    (void) drawable;
2074    (void) barrier;
2075 }
2076
2077 static Bool
2078 __glXQueryMaxSwapBarriersSGIX(Display * dpy, int screen, int *max)
2079 {
2080    (void) dpy;
2081    (void) screen;
2082    (void) max;
2083    return False;
2084 }
2085
2086
2087 /*
2088 ** GLX_OML_sync_control
2089 */
2090 static Bool
2091 __glXGetSyncValuesOML(Display * dpy, GLXDrawable drawable,
2092                       int64_t * ust, int64_t * msc, int64_t * sbc)
2093 {
2094    struct glx_display * const priv = __glXInitialize(dpy);
2095    int ret;
2096 #ifdef GLX_DIRECT_RENDERING
2097    __GLXDRIdrawable *pdraw;
2098 #endif
2099    struct glx_screen *psc;
2100
2101    if (!priv)
2102       return False;
2103
2104 #ifdef GLX_DIRECT_RENDERING
2105    pdraw = GetGLXDRIDrawable(dpy, drawable);
2106    psc = pdraw ? pdraw->psc : NULL;
2107    if (pdraw && psc->driScreen->getDrawableMSC) {
2108       ret = psc->driScreen->getDrawableMSC(psc, pdraw, ust, msc, sbc);
2109       return ret;
2110    }
2111 #endif
2112
2113    return False;
2114 }
2115
2116 #if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
2117 _X_HIDDEN GLboolean
2118 __glxGetMscRate(struct glx_screen *psc,
2119                 int32_t * numerator, int32_t * denominator)
2120 {
2121 #ifdef XF86VIDMODE
2122    XF86VidModeModeLine mode_line;
2123    int dot_clock;
2124    int i;
2125
2126    if (XF86VidModeQueryVersion(psc->dpy, &i, &i) &&
2127        XF86VidModeGetModeLine(psc->dpy, psc->scr, &dot_clock, &mode_line)) {
2128       unsigned n = dot_clock * 1000;
2129       unsigned d = mode_line.vtotal * mode_line.htotal;
2130
2131 # define V_INTERLACE 0x010
2132 # define V_DBLSCAN   0x020
2133
2134       if (mode_line.flags & V_INTERLACE)
2135          n *= 2;
2136       else if (mode_line.flags & V_DBLSCAN)
2137          d *= 2;
2138
2139       /* The OML_sync_control spec requires that if the refresh rate is a
2140        * whole number, that the returned numerator be equal to the refresh
2141        * rate and the denominator be 1.
2142        */
2143
2144       if (n % d == 0) {
2145          n /= d;
2146          d = 1;
2147       }
2148       else {
2149          static const unsigned f[] = { 13, 11, 7, 5, 3, 2, 0 };
2150
2151          /* This is a poor man's way to reduce a fraction.  It's far from
2152           * perfect, but it will work well enough for this situation.
2153           */
2154
2155          for (i = 0; f[i] != 0; i++) {
2156             while (n % f[i] == 0 && d % f[i] == 0) {
2157                d /= f[i];
2158                n /= f[i];
2159             }
2160          }
2161       }
2162
2163       *numerator = n;
2164       *denominator = d;
2165
2166       return True;
2167    }
2168    else
2169 #endif
2170
2171    return False;
2172 }
2173 #endif
2174
2175 /**
2176  * Determine the refresh rate of the specified drawable and display.
2177  *
2178  * \param dpy          Display whose refresh rate is to be determined.
2179  * \param drawable     Drawable whose refresh rate is to be determined.
2180  * \param numerator    Numerator of the refresh rate.
2181  * \param demoninator  Denominator of the refresh rate.
2182  * \return  If the refresh rate for the specified display and drawable could
2183  *          be calculated, True is returned.  Otherwise False is returned.
2184  *
2185  * \note This function is implemented entirely client-side.  A lot of other
2186  *       functionality is required to export GLX_OML_sync_control, so on
2187  *       XFree86 this function can be called for direct-rendering contexts
2188  *       when GLX_OML_sync_control appears in the client extension string.
2189  */
2190
2191 _X_HIDDEN GLboolean
2192 __glXGetMscRateOML(Display * dpy, GLXDrawable drawable,
2193                    int32_t * numerator, int32_t * denominator)
2194 {
2195 #if defined( GLX_DIRECT_RENDERING ) && defined( XF86VIDMODE )
2196    __GLXDRIdrawable *draw = GetGLXDRIDrawable(dpy, drawable);
2197
2198    if (draw == NULL)
2199       return False;
2200
2201    return __glxGetMscRate(draw->psc, numerator, denominator);
2202 #else
2203    (void) dpy;
2204    (void) drawable;
2205    (void) numerator;
2206    (void) denominator;
2207 #endif
2208    return False;
2209 }
2210
2211
2212 static int64_t
2213 __glXSwapBuffersMscOML(Display * dpy, GLXDrawable drawable,
2214                        int64_t target_msc, int64_t divisor, int64_t remainder)
2215 {
2216    struct glx_context *gc = __glXGetCurrentContext();
2217 #ifdef GLX_DIRECT_RENDERING
2218    __GLXDRIdrawable *pdraw = GetGLXDRIDrawable(dpy, drawable);
2219    struct glx_screen *psc = pdraw ? pdraw->psc : NULL;
2220 #endif
2221
2222    if (gc == &dummyContext) /* no GLX for this */
2223       return -1;
2224
2225 #ifdef GLX_DIRECT_RENDERING
2226    if (!pdraw || !gc->isDirect)
2227       return -1;
2228 #endif
2229
2230    /* The OML_sync_control spec says these should "generate a GLX_BAD_VALUE
2231     * error", but it also says "It [glXSwapBuffersMscOML] will return a value
2232     * of -1 if the function failed because of errors detected in the input
2233     * parameters"
2234     */
2235    if (divisor < 0 || remainder < 0 || target_msc < 0)
2236       return -1;
2237    if (divisor > 0 && remainder >= divisor)
2238       return -1;
2239
2240    if (target_msc == 0 && divisor == 0 && remainder == 0)
2241       remainder = 1;
2242
2243 #ifdef GLX_DIRECT_RENDERING
2244    if (psc->driScreen && psc->driScreen->swapBuffers)
2245       return (*psc->driScreen->swapBuffers)(pdraw, target_msc, divisor,
2246                                             remainder, False);
2247 #endif
2248
2249    return -1;
2250 }
2251
2252
2253 static Bool
2254 __glXWaitForMscOML(Display * dpy, GLXDrawable drawable,
2255                    int64_t target_msc, int64_t divisor,
2256                    int64_t remainder, int64_t * ust,
2257                    int64_t * msc, int64_t * sbc)
2258 {
2259 #ifdef GLX_DIRECT_RENDERING
2260    __GLXDRIdrawable *pdraw = GetGLXDRIDrawable(dpy, drawable);
2261    struct glx_screen *psc = pdraw ? pdraw->psc : NULL;
2262    int ret;
2263 #endif
2264
2265
2266    /* The OML_sync_control spec says these should "generate a GLX_BAD_VALUE
2267     * error", but the return type in the spec is Bool.
2268     */
2269    if (divisor < 0 || remainder < 0 || target_msc < 0)
2270       return False;
2271    if (divisor > 0 && remainder >= divisor)
2272       return False;
2273
2274 #ifdef GLX_DIRECT_RENDERING
2275    if (pdraw && psc->driScreen && psc->driScreen->waitForMSC) {
2276       ret = psc->driScreen->waitForMSC(pdraw, target_msc, divisor, remainder,
2277                                        ust, msc, sbc);
2278       return ret;
2279    }
2280 #endif
2281
2282    return False;
2283 }
2284
2285
2286 static Bool
2287 __glXWaitForSbcOML(Display * dpy, GLXDrawable drawable,
2288                    int64_t target_sbc, int64_t * ust,
2289                    int64_t * msc, int64_t * sbc)
2290 {
2291 #ifdef GLX_DIRECT_RENDERING
2292    __GLXDRIdrawable *pdraw = GetGLXDRIDrawable(dpy, drawable);
2293    struct glx_screen *psc = pdraw ? pdraw->psc : NULL;
2294    int ret;
2295 #endif
2296
2297    /* The OML_sync_control spec says this should "generate a GLX_BAD_VALUE
2298     * error", but the return type in the spec is Bool.
2299     */
2300    if (target_sbc < 0)
2301       return False;
2302
2303 #ifdef GLX_DIRECT_RENDERING
2304    if (pdraw && psc->driScreen && psc->driScreen->waitForSBC) {
2305       ret = psc->driScreen->waitForSBC(pdraw, target_sbc, ust, msc, sbc);
2306       return ret;
2307    }
2308 #endif
2309
2310    return False;
2311 }
2312
2313 /*@}*/
2314
2315
2316 /**
2317  * Mesa extension stubs.  These will help reduce portability problems.
2318  */
2319 /*@{*/
2320
2321 /**
2322  * Release all buffers associated with the specified GLX drawable.
2323  *
2324  * \todo
2325  * This function was intended for stand-alone Mesa.  The issue there is that
2326  * the library doesn't get any notification when a window is closed.  In
2327  * DRI there is a similar but slightly different issue.  When GLX 1.3 is
2328  * supported, there are 3 different functions to destroy a drawable.  It
2329  * should be possible to create GLX protocol (or have it determine which
2330  * protocol to use based on the type of the drawable) to have one function
2331  * do the work of 3.  For the direct-rendering case, this function could
2332  * just call the driver's \c __DRIdrawableRec::destroyDrawable function.
2333  * This would reduce the frequency with which \c __driGarbageCollectDrawables
2334  * would need to be used.  This really should be done as part of the new DRI
2335  * interface work.
2336  *
2337  * \sa http://oss.sgi.com/projects/ogl-sample/registry/MESA/release_buffers.txt
2338  *     __driGarbageCollectDrawables
2339  *     glXDestroyGLXPixmap
2340  *     glXDestroyPbuffer glXDestroyPixmap glXDestroyWindow
2341  *     glXDestroyGLXPbufferSGIX glXDestroyGLXVideoSourceSGIX
2342  */
2343 static Bool
2344 __glXReleaseBuffersMESA(Display * dpy, GLXDrawable d)
2345 {
2346    (void) dpy;
2347    (void) d;
2348    return False;
2349 }
2350
2351
2352 _GLX_PUBLIC GLXPixmap
2353 glXCreateGLXPixmapMESA(Display * dpy, XVisualInfo * visual,
2354                        Pixmap pixmap, Colormap cmap)
2355 {
2356    (void) dpy;
2357    (void) visual;
2358    (void) pixmap;
2359    (void) cmap;
2360    return 0;
2361 }
2362
2363 /*@}*/
2364
2365
2366 /**
2367  * GLX_MESA_copy_sub_buffer
2368  */
2369 #define X_GLXvop_CopySubBufferMESA 5154 /* temporary */
2370 static void
2371 __glXCopySubBufferMESA(Display * dpy, GLXDrawable drawable,
2372                        int x, int y, int width, int height)
2373 {
2374    xGLXVendorPrivateReq *req;
2375    struct glx_context *gc;
2376    GLXContextTag tag;
2377    CARD32 *drawable_ptr;
2378    INT32 *x_ptr, *y_ptr, *w_ptr, *h_ptr;
2379    CARD8 opcode;
2380
2381 #if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
2382    __GLXDRIdrawable *pdraw = GetGLXDRIDrawable(dpy, drawable);
2383    if (pdraw != NULL) {
2384       struct glx_screen *psc = pdraw->psc;
2385       if (psc->driScreen->copySubBuffer != NULL) {
2386          (*psc->driScreen->copySubBuffer) (pdraw, x, y, width, height, True);
2387       }
2388
2389       return;
2390    }
2391 #endif
2392
2393    opcode = __glXSetupForCommand(dpy);
2394    if (!opcode)
2395       return;
2396
2397    /*
2398     ** The calling thread may or may not have a current context.  If it
2399     ** does, send the context tag so the server can do a flush.
2400     */
2401    gc = __glXGetCurrentContext();
2402    if ((gc != &dummyContext) && (dpy == gc->currentDpy) &&
2403        ((drawable == gc->currentDrawable) ||
2404         (drawable == gc->currentReadable))) {
2405       tag = gc->currentContextTag;
2406    }
2407    else {
2408       tag = 0;
2409    }
2410
2411    LockDisplay(dpy);
2412    GetReqExtra(GLXVendorPrivate, sizeof(CARD32) + sizeof(INT32) * 4, req);
2413    req->reqType = opcode;
2414    req->glxCode = X_GLXVendorPrivate;
2415    req->vendorCode = X_GLXvop_CopySubBufferMESA;
2416    req->contextTag = tag;
2417
2418    drawable_ptr = (CARD32 *) (req + 1);
2419    x_ptr = (INT32 *) (drawable_ptr + 1);
2420    y_ptr = (INT32 *) (drawable_ptr + 2);
2421    w_ptr = (INT32 *) (drawable_ptr + 3);
2422    h_ptr = (INT32 *) (drawable_ptr + 4);
2423
2424    *drawable_ptr = drawable;
2425    *x_ptr = x;
2426    *y_ptr = y;
2427    *w_ptr = width;
2428    *h_ptr = height;
2429
2430    UnlockDisplay(dpy);
2431    SyncHandle();
2432 }
2433
2434 /*@{*/
2435 static void
2436 __glXBindTexImageEXT(Display * dpy,
2437                      GLXDrawable drawable, int buffer, const int *attrib_list)
2438 {
2439    struct glx_context *gc = __glXGetCurrentContext();
2440
2441    if (gc == &dummyContext || gc->vtable->bind_tex_image == NULL)
2442       return;
2443
2444    gc->vtable->bind_tex_image(dpy, drawable, buffer, attrib_list);
2445 }
2446
2447 static void
2448 __glXReleaseTexImageEXT(Display * dpy, GLXDrawable drawable, int buffer)
2449 {
2450    struct glx_context *gc = __glXGetCurrentContext();
2451
2452    if (gc == &dummyContext || gc->vtable->release_tex_image == NULL)
2453       return;
2454
2455    gc->vtable->release_tex_image(dpy, drawable, buffer);
2456 }
2457
2458 /*@}*/
2459
2460 #endif /* GLX_USE_APPLEGL */
2461
2462 /*
2463 ** glXGetProcAddress support
2464 */
2465
2466 struct name_address_pair
2467 {
2468    const char *Name;
2469    GLvoid *Address;
2470 };
2471
2472 #define GLX_FUNCTION(f) { # f, (GLvoid *) f }
2473 #define GLX_FUNCTION2(n,f) { # n, (GLvoid *) f }
2474
2475 static const struct name_address_pair GLX_functions[] = {
2476    /*** GLX_VERSION_1_0 ***/
2477    GLX_FUNCTION(glXChooseVisual),
2478    GLX_FUNCTION(glXCopyContext),
2479    GLX_FUNCTION(glXCreateContext),
2480    GLX_FUNCTION(glXCreateGLXPixmap),
2481    GLX_FUNCTION(glXDestroyContext),
2482    GLX_FUNCTION(glXDestroyGLXPixmap),
2483    GLX_FUNCTION(glXGetConfig),
2484    GLX_FUNCTION(glXGetCurrentContext),
2485    GLX_FUNCTION(glXGetCurrentDrawable),
2486    GLX_FUNCTION(glXIsDirect),
2487    GLX_FUNCTION(glXMakeCurrent),
2488    GLX_FUNCTION(glXQueryExtension),
2489    GLX_FUNCTION(glXQueryVersion),
2490    GLX_FUNCTION(glXSwapBuffers),
2491    GLX_FUNCTION(glXUseXFont),
2492    GLX_FUNCTION(glXWaitGL),
2493    GLX_FUNCTION(glXWaitX),
2494
2495    /*** GLX_VERSION_1_1 ***/
2496    GLX_FUNCTION(glXGetClientString),
2497    GLX_FUNCTION(glXQueryExtensionsString),
2498    GLX_FUNCTION(glXQueryServerString),
2499
2500    /*** GLX_VERSION_1_2 ***/
2501    GLX_FUNCTION(glXGetCurrentDisplay),
2502
2503    /*** GLX_VERSION_1_3 ***/
2504    GLX_FUNCTION(glXChooseFBConfig),
2505    GLX_FUNCTION(glXCreateNewContext),
2506    GLX_FUNCTION(glXCreatePbuffer),
2507    GLX_FUNCTION(glXCreatePixmap),
2508    GLX_FUNCTION(glXCreateWindow),
2509    GLX_FUNCTION(glXDestroyPbuffer),
2510    GLX_FUNCTION(glXDestroyPixmap),
2511    GLX_FUNCTION(glXDestroyWindow),
2512    GLX_FUNCTION(glXGetCurrentReadDrawable),
2513    GLX_FUNCTION(glXGetFBConfigAttrib),
2514    GLX_FUNCTION(glXGetFBConfigs),
2515    GLX_FUNCTION(glXGetSelectedEvent),
2516    GLX_FUNCTION(glXGetVisualFromFBConfig),
2517    GLX_FUNCTION(glXMakeContextCurrent),
2518    GLX_FUNCTION(glXQueryContext),
2519    GLX_FUNCTION(glXQueryDrawable),
2520    GLX_FUNCTION(glXSelectEvent),
2521
2522 #ifndef GLX_USE_APPLEGL
2523    /*** GLX_SGI_swap_control ***/
2524    GLX_FUNCTION2(glXSwapIntervalSGI, __glXSwapIntervalSGI),
2525
2526    /*** GLX_SGI_video_sync ***/
2527    GLX_FUNCTION2(glXGetVideoSyncSGI, __glXGetVideoSyncSGI),
2528    GLX_FUNCTION2(glXWaitVideoSyncSGI, __glXWaitVideoSyncSGI),
2529
2530    /*** GLX_SGI_make_current_read ***/
2531    GLX_FUNCTION2(glXMakeCurrentReadSGI, glXMakeContextCurrent),
2532    GLX_FUNCTION2(glXGetCurrentReadDrawableSGI, glXGetCurrentReadDrawable),
2533
2534    /*** GLX_EXT_import_context ***/
2535    GLX_FUNCTION(glXFreeContextEXT),
2536    GLX_FUNCTION(glXGetContextIDEXT),
2537    GLX_FUNCTION2(glXGetCurrentDisplayEXT, glXGetCurrentDisplay),
2538    GLX_FUNCTION(glXImportContextEXT),
2539    GLX_FUNCTION2(glXQueryContextInfoEXT, glXQueryContext),
2540 #endif
2541
2542    /*** GLX_SGIX_fbconfig ***/
2543    GLX_FUNCTION2(glXGetFBConfigAttribSGIX, glXGetFBConfigAttrib),
2544    GLX_FUNCTION2(glXChooseFBConfigSGIX, glXChooseFBConfig),
2545    GLX_FUNCTION(glXCreateGLXPixmapWithConfigSGIX),
2546    GLX_FUNCTION(glXCreateContextWithConfigSGIX),
2547    GLX_FUNCTION2(glXGetVisualFromFBConfigSGIX, glXGetVisualFromFBConfig),
2548    GLX_FUNCTION(glXGetFBConfigFromVisualSGIX),
2549
2550 #ifndef GLX_USE_APPLEGL
2551    /*** GLX_SGIX_pbuffer ***/
2552    GLX_FUNCTION(glXCreateGLXPbufferSGIX),
2553    GLX_FUNCTION(glXDestroyGLXPbufferSGIX),
2554    GLX_FUNCTION(glXQueryGLXPbufferSGIX),
2555    GLX_FUNCTION(glXSelectEventSGIX),
2556    GLX_FUNCTION(glXGetSelectedEventSGIX),
2557
2558    /*** GLX_SGIX_swap_group ***/
2559    GLX_FUNCTION2(glXJoinSwapGroupSGIX, __glXJoinSwapGroupSGIX),
2560
2561    /*** GLX_SGIX_swap_barrier ***/
2562    GLX_FUNCTION2(glXBindSwapBarrierSGIX, __glXBindSwapBarrierSGIX),
2563    GLX_FUNCTION2(glXQueryMaxSwapBarriersSGIX, __glXQueryMaxSwapBarriersSGIX),
2564
2565    /*** GLX_MESA_copy_sub_buffer ***/
2566    GLX_FUNCTION2(glXCopySubBufferMESA, __glXCopySubBufferMESA),
2567
2568    /*** GLX_MESA_pixmap_colormap ***/
2569    GLX_FUNCTION(glXCreateGLXPixmapMESA),
2570
2571    /*** GLX_MESA_release_buffers ***/
2572    GLX_FUNCTION2(glXReleaseBuffersMESA, __glXReleaseBuffersMESA),
2573
2574    /*** GLX_MESA_swap_control ***/
2575    GLX_FUNCTION2(glXSwapIntervalMESA, __glXSwapIntervalMESA),
2576    GLX_FUNCTION2(glXGetSwapIntervalMESA, __glXGetSwapIntervalMESA),
2577 #endif
2578
2579    /*** GLX_ARB_get_proc_address ***/
2580    GLX_FUNCTION(glXGetProcAddressARB),
2581
2582    /*** GLX 1.4 ***/
2583    GLX_FUNCTION2(glXGetProcAddress, glXGetProcAddressARB),
2584
2585 #ifndef GLX_USE_APPLEGL
2586    /*** GLX_OML_sync_control ***/
2587    GLX_FUNCTION2(glXWaitForSbcOML, __glXWaitForSbcOML),
2588    GLX_FUNCTION2(glXWaitForMscOML, __glXWaitForMscOML),
2589    GLX_FUNCTION2(glXSwapBuffersMscOML, __glXSwapBuffersMscOML),
2590    GLX_FUNCTION2(glXGetMscRateOML, __glXGetMscRateOML),
2591    GLX_FUNCTION2(glXGetSyncValuesOML, __glXGetSyncValuesOML),
2592
2593    /*** GLX_EXT_texture_from_pixmap ***/
2594    GLX_FUNCTION2(glXBindTexImageEXT, __glXBindTexImageEXT),
2595    GLX_FUNCTION2(glXReleaseTexImageEXT, __glXReleaseTexImageEXT),
2596 #endif
2597
2598 #if defined(GLX_DIRECT_RENDERING) && defined(GLX_USE_DRM)
2599    /*** DRI configuration ***/
2600    GLX_FUNCTION(glXGetScreenDriver),
2601    GLX_FUNCTION(glXGetDriverConfig),
2602 #endif
2603
2604    /*** GLX_ARB_create_context and GLX_ARB_create_context_profile ***/
2605    GLX_FUNCTION(glXCreateContextAttribsARB),
2606
2607    /*** GLX_MESA_query_renderer ***/
2608    GLX_FUNCTION(glXQueryRendererIntegerMESA),
2609    GLX_FUNCTION(glXQueryRendererStringMESA),
2610    GLX_FUNCTION(glXQueryCurrentRendererIntegerMESA),
2611    GLX_FUNCTION(glXQueryCurrentRendererStringMESA),
2612
2613    {NULL, NULL}                 /* end of list */
2614 };
2615
2616 static const GLvoid *
2617 get_glx_proc_address(const char *funcName)
2618 {
2619    GLuint i;
2620
2621    /* try static functions */
2622    for (i = 0; GLX_functions[i].Name; i++) {
2623       if (strcmp(GLX_functions[i].Name, funcName) == 0)
2624          return GLX_functions[i].Address;
2625    }
2626
2627    return NULL;
2628 }
2629
2630 /**
2631  * Get the address of a named GL function.  This is the pre-GLX 1.4 name for
2632  * \c glXGetProcAddress.
2633  *
2634  * \param procName  Name of a GL or GLX function.
2635  * \returns         A pointer to the named function
2636  *
2637  * \sa glXGetProcAddress
2638  */
2639 _GLX_PUBLIC void (*glXGetProcAddressARB(const GLubyte * procName)) (void)
2640 {
2641    typedef void (*gl_function) (void);
2642    gl_function f;
2643
2644
2645    /* Search the table of GLX and internal functions first.  If that
2646     * fails and the supplied name could be a valid core GL name, try
2647     * searching the core GL function table.  This check is done to prevent
2648     * DRI based drivers from searching the core GL function table for
2649     * internal API functions.
2650     */
2651    f = (gl_function) get_glx_proc_address((const char *) procName);
2652    if ((f == NULL) && (procName[0] == 'g') && (procName[1] == 'l')
2653        && (procName[2] != 'X')) {
2654 #ifdef GLX_SHARED_GLAPI
2655       f = (gl_function) __indirect_get_proc_address((const char *) procName);
2656 #endif
2657       if (!f)
2658          f = (gl_function) _glapi_get_proc_address((const char *) procName);
2659       if (!f) {
2660          struct glx_context *gc = __glXGetCurrentContext();
2661
2662          if (gc != NULL && gc->vtable->get_proc_address != NULL)
2663             f = gc->vtable->get_proc_address((const char *) procName);
2664       }
2665    }
2666    return f;
2667 }
2668
2669 /**
2670  * Get the address of a named GL function.  This is the GLX 1.4 name for
2671  * \c glXGetProcAddressARB.
2672  *
2673  * \param procName  Name of a GL or GLX function.
2674  * \returns         A pointer to the named function
2675  *
2676  * \sa glXGetProcAddressARB
2677  */
2678 _GLX_PUBLIC
2679 GLX_ALIAS(__GLXextFuncPtr, glXGetProcAddress,
2680           (const GLubyte * procName),
2681           (procName), glXGetProcAddressARB)
2682
2683 #if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
2684 /**
2685  * Get the unadjusted system time (UST).  Currently, the UST is measured in
2686  * microseconds since Epoc.  The actual resolution of the UST may vary from
2687  * system to system, and the units may vary from release to release.
2688  * Drivers should not call this function directly.  They should instead use
2689  * \c glXGetProcAddress to obtain a pointer to the function.
2690  *
2691  * \param ust Location to store the 64-bit UST
2692  * \returns Zero on success or a negative errno value on failure.
2693  *
2694  * \sa glXGetProcAddress, PFNGLXGETUSTPROC
2695  *
2696  * \since Internal API version 20030317.
2697  */
2698 _X_HIDDEN int
2699 __glXGetUST(int64_t * ust)
2700 {
2701    struct timeval tv;
2702
2703    if (ust == NULL) {
2704       return -EFAULT;
2705    }
2706
2707    if (gettimeofday(&tv, NULL) == 0) {
2708       ust[0] = (tv.tv_sec * 1000000) + tv.tv_usec;
2709       return 0;
2710    }
2711    else {
2712       return -errno;
2713    }
2714 }
2715 #endif /* GLX_DIRECT_RENDERING */
2716
2717 #if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
2718
2719 PUBLIC int
2720 MesaGLInteropGLXQueryDeviceInfo(Display *dpy, GLXContext context,
2721                                 struct mesa_glinterop_device_info *out)
2722 {
2723    struct glx_context *gc = (struct glx_context*)context;
2724    int ret;
2725
2726    __glXLock();
2727
2728    if (!gc || gc->xid == None || !gc->isDirect) {
2729       __glXUnlock();
2730       return MESA_GLINTEROP_INVALID_CONTEXT;
2731    }
2732
2733    if (!gc->vtable->interop_query_device_info) {
2734       __glXUnlock();
2735       return MESA_GLINTEROP_UNSUPPORTED;
2736    }
2737
2738    ret = gc->vtable->interop_query_device_info(gc, out);
2739    __glXUnlock();
2740    return ret;
2741 }
2742
2743 PUBLIC int
2744 MesaGLInteropGLXExportObject(Display *dpy, GLXContext context,
2745                              struct mesa_glinterop_export_in *in,
2746                              struct mesa_glinterop_export_out *out)
2747 {
2748    struct glx_context *gc = (struct glx_context*)context;
2749    int ret;
2750
2751    __glXLock();
2752
2753    if (!gc || gc->xid == None || !gc->isDirect) {
2754       __glXUnlock();
2755       return MESA_GLINTEROP_INVALID_CONTEXT;
2756    }
2757
2758    if (!gc->vtable->interop_export_object) {
2759       __glXUnlock();
2760       return MESA_GLINTEROP_UNSUPPORTED;
2761    }
2762
2763    ret = gc->vtable->interop_export_object(gc, in, out);
2764    __glXUnlock();
2765    return ret;
2766 }
2767
2768 #endif /* defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL) */