src/glx/dri_glx.c

   1 /**************************************************************************
   2
   3 Copyright 1998-1999 Precision Insight, Inc., Cedar Park, Texas.
   4 All Rights Reserved.
   5
   6 Permission is hereby granted, free of charge, to any person obtaining a
   7 copy of this software and associated documentation files (the
   8 "Software"), to deal in the Software without restriction, including
   9 without limitation the rights to use, copy, modify, merge, publish,
  10 distribute, sub license, and/or sell copies of the Software, and to
  11 permit persons to whom the Software is furnished to do so, subject to
  12 the following conditions:
  13
  14 The above copyright notice and this permission notice (including the
  15 next paragraph) shall be included in all copies or substantial portions
  16 of the Software.
  17
  18 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  19 OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  20 MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  21 IN NO EVENT SHALL PRECISION INSIGHT AND/OR ITS SUPPLIERS BE LIABLE FOR
  22 ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  23 TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  24 SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25
  26 **************************************************************************/
  27
  28 /*
  29  * Authors:
  30  *   Kevin E. Martin <kevin@precisioninsight.com>
  31  *   Brian Paul <brian@precisioninsight.com>
  32  *
  33  */
  34
  35 #ifdef GLX_DIRECT_RENDERING
  36
  37 #include <X11/Xlib.h>
  38 #include <X11/extensions/Xfixes.h>
  39 #include <X11/extensions/Xdamage.h>
  40 #include "glxclient.h"
  41 #include "xf86dri.h"
  42 #include "dri2.h"
  43 #include "sarea.h"
  44 #include <dlfcn.h>
  45 #include <sys/types.h>
  46 #include <sys/mman.h>
  47 #include "xf86drm.h"
  48 #include "dri_common.h"
  49
  50 typedef struct __GLXDRIdisplayPrivateRec __GLXDRIdisplayPrivate;
  51 typedef struct __GLXDRIcontextPrivateRec __GLXDRIcontextPrivate;
  52
  53 struct __GLXDRIdisplayPrivateRec
  54 {
  55    __GLXDRIdisplay base;
  56
  57    /*
  58     ** XFree86-DRI version information
  59     */
  60    int driMajor;
  61    int driMinor;
  62    int driPatch;
  63 };
  64
  65 struct __GLXDRIcontextPrivateRec
  66 {
  67    __GLXDRIcontext base;
  68    __DRIcontext *driContext;
  69    XID hwContextID;
  70    __GLXscreenConfigs *psc;
  71 };
  72
  73 /*
  74  * Given a display pointer and screen number, determine the name of
  75  * the DRI driver for the screen. (I.e. "r128", "tdfx", etc).
  76  * Return True for success, False for failure.
  77  */
  78 static Bool
  79 driGetDriverName(Display * dpy, int scrNum, char **driverName)
  80 {
  81    int directCapable;
  82    Bool b;
  83    int event, error;
  84    int driverMajor, driverMinor, driverPatch;
  85
  86    *driverName = NULL;
  87
  88    if (XF86DRIQueryExtension(dpy, &event, &error)) {    /* DRI1 */
  89       if (!XF86DRIQueryDirectRenderingCapable(dpy, scrNum, &directCapable)) {
  90          ErrorMessageF("XF86DRIQueryDirectRenderingCapable failed\n");
  91          return False;
  92       }
  93       if (!directCapable) {
  94          ErrorMessageF("XF86DRIQueryDirectRenderingCapable returned false\n");
  95          return False;
  96       }
  97
  98       b = XF86DRIGetClientDriverName(dpy, scrNum, &driverMajor, &driverMinor,
  99                                      &driverPatch, driverName);
 100       if (!b) {
 101          ErrorMessageF("Cannot determine driver name for screen %d\n",
 102                        scrNum);
 103          return False;
 104       }
 105
 106       InfoMessageF("XF86DRIGetClientDriverName: %d.%d.%d %s (screen %d)\n",
 107                    driverMajor, driverMinor, driverPatch, *driverName,
 108                    scrNum);
 109
 110       return True;
 111    }
 112    else if (DRI2QueryExtension(dpy, &event, &error)) {  /* DRI2 */
 113       char *dev;
 114       Bool ret = DRI2Connect(dpy, RootWindow(dpy, scrNum), driverName, &dev);
 115
 116       if (ret)
 117          Xfree(dev);
 118
 119       return ret;
 120    }
 121
 122    return False;
 123 }
 124
 125 /*
 126  * Exported function for querying the DRI driver for a given screen.
 127  *
 128  * The returned char pointer points to a static array that will be
 129  * overwritten by subsequent calls.
 130  */
 131 PUBLIC const char *
 132 glXGetScreenDriver(Display * dpy, int scrNum)
 133 {
 134    static char ret[32];
 135    char *driverName;
 136    if (driGetDriverName(dpy, scrNum, &driverName)) {
 137       int len;
 138       if (!driverName)
 139          return NULL;
 140       len = strlen(driverName);
 141       if (len >= 31)
 142          return NULL;
 143       memcpy(ret, driverName, len + 1);
 144       Xfree(driverName);
 145       return ret;
 146    }
 147    return NULL;
 148 }
 149
 150 /*
 151  * Exported function for obtaining a driver's option list (UTF-8 encoded XML).
 152  *
 153  * The returned char pointer points directly into the driver. Therefore
 154  * it should be treated as a constant.
 155  *
 156  * If the driver was not found or does not support configuration NULL is
 157  * returned.
 158  *
 159  * Note: The driver remains opened after this function returns.
 160  */
 161 PUBLIC const char *
 162 glXGetDriverConfig(const char *driverName)
 163 {
 164    void *handle = driOpenDriver(driverName);
 165    if (handle)
 166       return dlsym(handle, "__driConfigOptions");
 167    else
 168       return NULL;
 169 }
 170
 171 #ifdef XDAMAGE_1_1_INTERFACE
 172
 173 static GLboolean
 174 has_damage_post(Display * dpy)
 175 {
 176    static GLboolean inited = GL_FALSE;
 177    static GLboolean has_damage;
 178
 179    if (!inited) {
 180       int major, minor;
 181
 182       if (XDamageQueryVersion(dpy, &major, &minor) &&
 183           major == 1 && minor >= 1) {
 184          has_damage = GL_TRUE;
 185       }
 186       else {
 187          has_damage = GL_FALSE;
 188       }
 189       inited = GL_TRUE;
 190    }
 191
 192    return has_damage;
 193 }
 194
 195 static void
 196 __glXReportDamage(__DRIdrawable * driDraw,
 197                   int x, int y,
 198                   drm_clip_rect_t * rects, int num_rects,
 199                   GLboolean front_buffer, void *loaderPrivate)
 200 {
 201    XRectangle *xrects;
 202    XserverRegion region;
 203    int i;
 204    int x_off, y_off;
 205    __GLXDRIdrawable *glxDraw = loaderPrivate;
 206    __GLXscreenConfigs *psc = glxDraw->psc;
 207    Display *dpy = psc->dpy;
 208    Drawable drawable;
 209
 210    if (!has_damage_post(dpy))
 211       return;
 212
 213    if (front_buffer) {
 214       x_off = x;
 215       y_off = y;
 216       drawable = RootWindow(dpy, psc->scr);
 217    }
 218    else {
 219       x_off = 0;
 220       y_off = 0;
 221       drawable = glxDraw->xDrawable;
 222    }
 223
 224    xrects = malloc(sizeof(XRectangle) * num_rects);
 225    if (xrects == NULL)
 226       return;
 227
 228    for (i = 0; i < num_rects; i++) {
 229       xrects[i].x = rects[i].x1 + x_off;
 230       xrects[i].y = rects[i].y1 + y_off;
 231       xrects[i].width = rects[i].x2 - rects[i].x1;
 232       xrects[i].height = rects[i].y2 - rects[i].y1;
 233    }
 234    region = XFixesCreateRegion(dpy, xrects, num_rects);
 235    free(xrects);
 236    XDamageAdd(dpy, drawable, region);
 237    XFixesDestroyRegion(dpy, region);
 238 }
 239
 240 static const __DRIdamageExtension damageExtension = {
 241    {__DRI_DAMAGE, __DRI_DAMAGE_VERSION},
 242    __glXReportDamage,
 243 };
 244
 245 #endif
 246
 247 static GLboolean
 248 __glXDRIGetDrawableInfo(__DRIdrawable * drawable,
 249                         unsigned int *index, unsigned int *stamp,
 250                         int *X, int *Y, int *W, int *H,
 251                         int *numClipRects, drm_clip_rect_t ** pClipRects,
 252                         int *backX, int *backY,
 253                         int *numBackClipRects,
 254                         drm_clip_rect_t ** pBackClipRects,
 255                         void *loaderPrivate)
 256 {
 257    __GLXDRIdrawable *glxDraw = loaderPrivate;
 258    __GLXscreenConfigs *psc = glxDraw->psc;
 259    Display *dpy = psc->dpy;
 260
 261    return XF86DRIGetDrawableInfo(dpy, psc->scr, glxDraw->drawable,
 262                                  index, stamp, X, Y, W, H,
 263                                  numClipRects, pClipRects,
 264                                  backX, backY,
 265                                  numBackClipRects, pBackClipRects);
 266 }
 267
 268 static const __DRIgetDrawableInfoExtension getDrawableInfoExtension = {
 269    {__DRI_GET_DRAWABLE_INFO, __DRI_GET_DRAWABLE_INFO_VERSION},
 270    __glXDRIGetDrawableInfo
 271 };
 272
 273 static const __DRIextension *loader_extensions[] = {
 274    &systemTimeExtension.base,
 275    &getDrawableInfoExtension.base,
 276 #ifdef XDAMAGE_1_1_INTERFACE
 277    &damageExtension.base,
 278 #endif
 279    NULL
 280 };
 281
 282 /**
 283  * Perform the required libGL-side initialization and call the client-side
 284  * driver's \c __driCreateNewScreen function.
 285  *
 286  * \param dpy    Display pointer.
 287  * \param scrn   Screen number on the display.
 288  * \param psc    DRI screen information.
 289  * \param driDpy DRI display information.
 290  * \param createNewScreen  Pointer to the client-side driver's
 291  *               \c __driCreateNewScreen function.
 292  * \returns A pointer to the \c __DRIscreen structure returned by
 293  *          the client-side driver on success, or \c NULL on failure.
 294  */
 295 static void *
 296 CallCreateNewScreen(Display * dpy, int scrn, __GLXscreenConfigs * psc,
 297                     __GLXDRIdisplayPrivate * driDpy)
 298 {
 299    void *psp = NULL;
 300    drm_handle_t hSAREA;
 301    drmAddress pSAREA = MAP_FAILED;
 302    char *BusID;
 303    __DRIversion ddx_version;
 304    __DRIversion dri_version;
 305    __DRIversion drm_version;
 306    __DRIframebuffer framebuffer;
 307    int fd = -1;
 308    int status;
 309
 310    drm_magic_t magic;
 311    drmVersionPtr version;
 312    int newlyopened;
 313    char *driverName;
 314    drm_handle_t hFB;
 315    int junk;
 316    const __DRIconfig **driver_configs;
 317    __GLcontextModes *visual;
 318
 319    /* DRI protocol version. */
 320    dri_version.major = driDpy->driMajor;
 321    dri_version.minor = driDpy->driMinor;
 322    dri_version.patch = driDpy->driPatch;
 323
 324    framebuffer.base = MAP_FAILED;
 325    framebuffer.dev_priv = NULL;
 326    framebuffer.size = 0;
 327
 328    if (!XF86DRIOpenConnection(dpy, scrn, &hSAREA, &BusID)) {
 329       ErrorMessageF("XF86DRIOpenConnection failed\n");
 330       goto handle_error;
 331    }
 332
 333    fd = drmOpenOnce(NULL, BusID, &newlyopened);
 334
 335    Xfree(BusID);                /* No longer needed */
 336
 337    if (fd < 0) {
 338       ErrorMessageF("drmOpenOnce failed (%s)\n", strerror(-fd));
 339       goto handle_error;
 340    }
 341
 342    if (drmGetMagic(fd, &magic)) {
 343       ErrorMessageF("drmGetMagic failed\n");
 344       goto handle_error;
 345    }
 346
 347    version = drmGetVersion(fd);
 348    if (version) {
 349       drm_version.major = version->version_major;
 350       drm_version.minor = version->version_minor;
 351       drm_version.patch = version->version_patchlevel;
 352       drmFreeVersion(version);
 353    }
 354    else {
 355       drm_version.major = -1;
 356       drm_version.minor = -1;
 357       drm_version.patch = -1;
 358    }
 359
 360    if (newlyopened && !XF86DRIAuthConnection(dpy, scrn, magic)) {
 361       ErrorMessageF("XF86DRIAuthConnection failed\n");
 362       goto handle_error;
 363    }
 364
 365    /* Get device name (like "tdfx") and the ddx version numbers.
 366     * We'll check the version in each DRI driver's "createNewScreen"
 367     * function. */
 368    if (!XF86DRIGetClientDriverName(dpy, scrn,
 369                                    &ddx_version.major,
 370                                    &ddx_version.minor,
 371                                    &ddx_version.patch, &driverName)) {
 372       ErrorMessageF("XF86DRIGetClientDriverName failed\n");
 373       goto handle_error;
 374    }
 375
 376    Xfree(driverName);           /* No longer needed. */
 377
 378    /*
 379     * Get device-specific info.  pDevPriv will point to a struct
 380     * (such as DRIRADEONRec in xfree86/driver/ati/radeon_dri.h) that
 381     * has information about the screen size, depth, pitch, ancilliary
 382     * buffers, DRM mmap handles, etc.
 383     */
 384    if (!XF86DRIGetDeviceInfo(dpy, scrn, &hFB, &junk,
 385                              &framebuffer.size, &framebuffer.stride,
 386                              &framebuffer.dev_priv_size,
 387                              &framebuffer.dev_priv)) {
 388       ErrorMessageF("XF86DRIGetDeviceInfo failed");
 389       goto handle_error;
 390    }
 391
 392    framebuffer.width = DisplayWidth(dpy, scrn);
 393    framebuffer.height = DisplayHeight(dpy, scrn);
 394
 395    /* Map the framebuffer region. */
 396    status = drmMap(fd, hFB, framebuffer.size,
 397                    (drmAddressPtr) & framebuffer.base);
 398    if (status != 0) {
 399       ErrorMessageF("drmMap of framebuffer failed (%s)", strerror(-status));
 400       goto handle_error;
 401    }
 402
 403    /* Map the SAREA region.  Further mmap regions may be setup in
 404     * each DRI driver's "createNewScreen" function.
 405     */
 406    status = drmMap(fd, hSAREA, SAREA_MAX, &pSAREA);
 407    if (status != 0) {
 408       ErrorMessageF("drmMap of SAREA failed (%s)", strerror(-status));
 409       goto handle_error;
 410    }
 411
 412    psp = (*psc->legacy->createNewScreen) (scrn,
 413                                           &ddx_version,
 414                                           &dri_version,
 415                                           &drm_version,
 416                                           &framebuffer,
 417                                           pSAREA,
 418                                           fd,
 419                                           loader_extensions,
 420                                           &driver_configs, psc);
 421
 422    if (psp == NULL) {
 423       ErrorMessageF("Calling driver entry point failed");
 424       goto handle_error;
 425    }
 426
 427    psc->configs = driConvertConfigs(psc->core, psc->configs, driver_configs);
 428    psc->visuals = driConvertConfigs(psc->core, psc->visuals, driver_configs);
 429
 430    psc->driver_configs = driver_configs;
 431
 432    /* Visuals with depth != screen depth are subject to automatic compositing
 433     * in the X server, so DRI1 can't render to them properly. Mark them as
 434     * non-conformant to prevent apps from picking them up accidentally.
 435     */
 436    for (visual = psc->visuals; visual; visual = visual->next) {
 437       XVisualInfo template;
 438       XVisualInfo *visuals;
 439       int num_visuals;
 440       long mask;
 441
 442       template.visualid = visual->visualID;
 443       mask = VisualIDMask;
 444       visuals = XGetVisualInfo(dpy, mask, &template, &num_visuals);
 445
 446       if (visuals) {
 447          if (num_visuals > 0 && visuals->depth != DefaultDepth(dpy, scrn))
 448             visual->visualRating = GLX_NON_CONFORMANT_CONFIG;
 449
 450          XFree(visuals);
 451       }
 452    }
 453
 454    return psp;
 455
 456  handle_error:
 457    if (pSAREA != MAP_FAILED)
 458       drmUnmap(pSAREA, SAREA_MAX);
 459
 460    if (framebuffer.base != MAP_FAILED)
 461       drmUnmap((drmAddress) framebuffer.base, framebuffer.size);
 462
 463    if (framebuffer.dev_priv != NULL)
 464       Xfree(framebuffer.dev_priv);
 465
 466    if (fd >= 0)
 467       drmCloseOnce(fd);
 468
 469    XF86DRICloseConnection(dpy, scrn);
 470
 471    ErrorMessageF("reverting to software direct rendering\n");
 472
 473    return NULL;
 474 }
 475
 476 static void
 477 driDestroyContext(__GLXDRIcontext * context,
 478                   __GLXscreenConfigs * psc, Display * dpy)
 479 {
 480    __GLXDRIcontextPrivate *pcp = (__GLXDRIcontextPrivate *) context;
 481
 482    (*psc->core->destroyContext) (pcp->driContext);
 483
 484    XF86DRIDestroyContext(psc->dpy, psc->scr, pcp->hwContextID);
 485    Xfree(pcp);
 486 }
 487
 488 static Bool
 489 driBindContext(__GLXDRIcontext * context,
 490                __GLXDRIdrawable * draw, __GLXDRIdrawable * read)
 491 {
 492    __GLXDRIcontextPrivate *pcp = (__GLXDRIcontextPrivate *) context;
 493    const __DRIcoreExtension *core = pcp->psc->core;
 494
 495    return (*core->bindContext) (pcp->driContext,
 496                                 draw->driDrawable, read->driDrawable);
 497 }
 498
 499 static void
 500 driUnbindContext(__GLXDRIcontext * context)
 501 {
 502    __GLXDRIcontextPrivate *pcp = (__GLXDRIcontextPrivate *) context;
 503    const __DRIcoreExtension *core = pcp->psc->core;
 504
 505    (*core->unbindContext) (pcp->driContext);
 506 }
 507
 508 static __GLXDRIcontext *
 509 driCreateContext(__GLXscreenConfigs * psc,
 510                  const __GLcontextModes * mode,
 511                  GLXContext gc, GLXContext shareList, int renderType)
 512 {
 513    __GLXDRIcontextPrivate *pcp, *pcp_shared;
 514    drm_context_t hwContext;
 515    __DRIcontext *shared = NULL;
 516    __GLXDRIconfigPrivate *config = (__GLXDRIconfigPrivate *) mode;
 517
 518    if (!psc || !psc->driScreen)
 519       return NULL;
 520
 521    if (shareList) {
 522       pcp_shared = (__GLXDRIcontextPrivate *) shareList->driContext;
 523       shared = pcp_shared->driContext;
 524    }
 525
 526    pcp = Xmalloc(sizeof *pcp);
 527    if (pcp == NULL)
 528       return NULL;
 529
 530    pcp->psc = psc;
 531    if (!XF86DRICreateContextWithConfig(psc->dpy, psc->scr,
 532                                        mode->visualID,
 533                                        &pcp->hwContextID, &hwContext)) {
 534       Xfree(pcp);
 535       return NULL;
 536    }
 537
 538    pcp->driContext =
 539       (*psc->legacy->createNewContext) (psc->__driScreen,
 540                                         config->driConfig,
 541                                         renderType, shared, hwContext, pcp);
 542    if (pcp->driContext == NULL) {
 543       XF86DRIDestroyContext(psc->dpy, psc->scr, pcp->hwContextID);
 544       Xfree(pcp);
 545       return NULL;
 546    }
 547
 548    pcp->base.destroyContext = driDestroyContext;
 549    pcp->base.bindContext = driBindContext;
 550    pcp->base.unbindContext = driUnbindContext;
 551
 552    return &pcp->base;
 553 }
 554
 555 static void
 556 driDestroyDrawable(__GLXDRIdrawable * pdraw)
 557 {
 558    __GLXscreenConfigs *psc = pdraw->psc;
 559
 560    (*psc->core->destroyDrawable) (pdraw->driDrawable);
 561    XF86DRIDestroyDrawable(psc->dpy, psc->scr, pdraw->drawable);
 562    Xfree(pdraw);
 563 }
 564
 565 static __GLXDRIdrawable *
 566 driCreateDrawable(__GLXscreenConfigs * psc,
 567                   XID xDrawable,
 568                   GLXDrawable drawable, const __GLcontextModes * modes)
 569 {
 570    __GLXDRIdrawable *pdraw;
 571    drm_drawable_t hwDrawable;
 572    void *empty_attribute_list = NULL;
 573    __GLXDRIconfigPrivate *config = (__GLXDRIconfigPrivate *) modes;
 574
 575    /* Old dri can't handle GLX 1.3+ drawable constructors. */
 576    if (xDrawable != drawable)
 577       return NULL;
 578
 579    pdraw = Xmalloc(sizeof(*pdraw));
 580    if (!pdraw)
 581       return NULL;
 582
 583    pdraw->drawable = drawable;
 584    pdraw->psc = psc;
 585
 586    if (!XF86DRICreateDrawable(psc->dpy, psc->scr, drawable, &hwDrawable)) {
 587       Xfree(pdraw);
 588       return NULL;
 589    }
 590
 591    /* Create a new drawable */
 592    pdraw->driDrawable =
 593       (*psc->legacy->createNewDrawable) (psc->__driScreen,
 594                                          config->driConfig,
 595                                          hwDrawable,
 596                                          GLX_WINDOW_BIT,
 597                                          empty_attribute_list, pdraw);
 598
 599    if (!pdraw->driDrawable) {
 600       XF86DRIDestroyDrawable(psc->dpy, psc->scr, drawable);
 601       Xfree(pdraw);
 602       return NULL;
 603    }
 604
 605    pdraw->destroyDrawable = driDestroyDrawable;
 606
 607    return pdraw;
 608 }
 609
 610 static int64_t
 611 driSwapBuffers(__GLXDRIdrawable * pdraw, int64_t unused1, int64_t unused2,
 612                int64_t unused3)
 613 {
 614    (*pdraw->psc->core->swapBuffers) (pdraw->driDrawable);
 615    return 0;
 616 }
 617
 618 static void
 619 driCopySubBuffer(__GLXDRIdrawable * pdraw,
 620                  int x, int y, int width, int height)
 621 {
 622    (*pdraw->psc->driCopySubBuffer->copySubBuffer) (pdraw->driDrawable,
 623                                                    x, y, width, height);
 624 }
 625
 626 static void
 627 driDestroyScreen(__GLXscreenConfigs * psc)
 628 {
 629    /* Free the direct rendering per screen data */
 630    if (psc->__driScreen)
 631       (*psc->core->destroyScreen) (psc->__driScreen);
 632    psc->__driScreen = NULL;
 633    if (psc->driver)
 634       dlclose(psc->driver);
 635 }
 636
 637 static __GLXDRIscreen *
 638 driCreateScreen(__GLXscreenConfigs * psc, int screen,
 639                 __GLXdisplayPrivate * priv)
 640 {
 641    __GLXDRIdisplayPrivate *pdp;
 642    __GLXDRIscreen *psp;
 643    const __DRIextension **extensions;
 644    char *driverName;
 645    int i;
 646
 647    psp = Xcalloc(1, sizeof *psp);
 648    if (psp == NULL)
 649       return NULL;
 650
 651    /* Initialize per screen dynamic client GLX extensions */
 652    psc->ext_list_first_time = GL_TRUE;
 653
 654    if (!driGetDriverName(priv->dpy, screen, &driverName)) {
 655       Xfree(psp);
 656       return NULL;
 657    }
 658
 659    psc->driver = driOpenDriver(driverName);
 660    Xfree(driverName);
 661    if (psc->driver == NULL) {
 662       Xfree(psp);
 663       return NULL;
 664    }
 665
 666    extensions = dlsym(psc->driver, __DRI_DRIVER_EXTENSIONS);
 667    if (extensions == NULL) {
 668       ErrorMessageF("driver exports no extensions (%s)\n", dlerror());
 669       Xfree(psp);
 670       return NULL;
 671    }
 672
 673    for (i = 0; extensions[i]; i++) {
 674       if (strcmp(extensions[i]->name, __DRI_CORE) == 0)
 675          psc->core = (__DRIcoreExtension *) extensions[i];
 676       if (strcmp(extensions[i]->name, __DRI_LEGACY) == 0)
 677          psc->legacy = (__DRIlegacyExtension *) extensions[i];
 678    }
 679
 680    if (psc->core == NULL || psc->legacy == NULL) {
 681       Xfree(psp);
 682       return NULL;
 683    }
 684
 685    pdp = (__GLXDRIdisplayPrivate *) priv->driDisplay;
 686    psc->__driScreen = CallCreateNewScreen(psc->dpy, screen, psc, pdp);
 687    if (psc->__driScreen == NULL) {
 688       dlclose(psc->driver);
 689       Xfree(psp);
 690       return NULL;
 691    }
 692
 693    driBindExtensions(psc);
 694    driBindCommonExtensions(psc);
 695
 696    if (psc->driCopySubBuffer)
 697       psp->copySubBuffer = driCopySubBuffer;
 698
 699    psp->destroyScreen = driDestroyScreen;
 700    psp->createContext = driCreateContext;
 701    psp->createDrawable = driCreateDrawable;
 702    psp->swapBuffers = driSwapBuffers;
 703    psp->waitX = NULL;
 704    psp->waitGL = NULL;
 705
 706    return psp;
 707 }
 708
 709 /* Called from __glXFreeDisplayPrivate.
 710  */
 711 static void
 712 driDestroyDisplay(__GLXDRIdisplay * dpy)
 713 {
 714    Xfree(dpy);
 715 }
 716
 717 /*
 718  * Allocate, initialize and return a __DRIdisplayPrivate object.
 719  * This is called from __glXInitialize() when we are given a new
 720  * display pointer.
 721  */
 722 _X_HIDDEN __GLXDRIdisplay *
 723 driCreateDisplay(Display * dpy)
 724 {
 725    __GLXDRIdisplayPrivate *pdpyp;
 726    int eventBase, errorBase;
 727    int major, minor, patch;
 728
 729    if (!XF86DRIQueryExtension(dpy, &eventBase, &errorBase)) {
 730       return NULL;
 731    }
 732
 733    if (!XF86DRIQueryVersion(dpy, &major, &minor, &patch)) {
 734       return NULL;
 735    }
 736
 737    pdpyp = Xmalloc(sizeof *pdpyp);
 738    if (!pdpyp) {
 739       return NULL;
 740    }
 741
 742    pdpyp->driMajor = major;
 743    pdpyp->driMinor = minor;
 744    pdpyp->driPatch = patch;
 745
 746    pdpyp->base.destroyDisplay = driDestroyDisplay;
 747    pdpyp->base.createScreen = driCreateScreen;
 748
 749    return &pdpyp->base;
 750 }
 751
 752 #endif /* GLX_DIRECT_RENDERING */