src/glx/dri2_glx.c

   1 /*
   2  * Copyright © 2008 Red Hat, Inc.
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Soft-
   6  * ware"), to deal in the Software without restriction, including without
   7  * limitation the rights to use, copy, modify, merge, publish, distribute,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, provided that the above copyright
  10  * notice(s) and this permission notice appear in all copies of the Soft-
  11  * ware and that both the above copyright notice(s) and this permission
  12  * notice appear in supporting documentation.
  13  *
  14  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  15  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABIL-
  16  * ITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY
  17  * RIGHTS. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR HOLDERS INCLUDED IN
  18  * THIS NOTICE BE LIABLE FOR ANY CLAIM, OR ANY SPECIAL INDIRECT OR CONSE-
  19  * QUENTIAL DAMAGES, OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
  20  * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
  21  * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFOR-
  22  * MANCE OF THIS SOFTWARE.
  23  *
  24  * Except as contained in this notice, the name of a copyright holder shall
  25  * not be used in advertising or otherwise to promote the sale, use or
  26  * other dealings in this Software without prior written authorization of
  27  * the copyright holder.
  28  *
  29  * Authors:
  30  *   Kristian Høgsberg (krh@redhat.com)
  31  */
  32
  33 #if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
  34
  35 #include <X11/Xlib.h>
  36 #include <X11/extensions/Xfixes.h>
  37 #include <X11/Xlib-xcb.h>
  38 #include <xcb/xcb.h>
  39 #include <xcb/dri2.h>
  40 #include "glapi.h"
  41 #include "glxclient.h"
  42 #include <X11/extensions/dri2proto.h>
  43 #include "xf86dri.h"
  44 #include <dlfcn.h>
  45 #include <fcntl.h>
  46 #include <unistd.h>
  47 #include <sys/types.h>
  48 #include <sys/mman.h>
  49 #include <sys/time.h>
  50 #include "xf86drm.h"
  51 #include "dri2.h"
  52 #include "dri_common.h"
  53
  54 /* From xmlpool/options.h, user exposed so should be stable */
  55 #define DRI_CONF_VBLANK_NEVER 0
  56 #define DRI_CONF_VBLANK_DEF_INTERVAL_0 1
  57 #define DRI_CONF_VBLANK_DEF_INTERVAL_1 2
  58 #define DRI_CONF_VBLANK_ALWAYS_SYNC 3
  59
  60 #undef DRI2_MINOR
  61 #define DRI2_MINOR 1
  62
  63 struct dri2_display
  64 {
  65    __GLXDRIdisplay base;
  66
  67    /*
  68     ** XFree86-DRI version information
  69     */
  70    int driMajor;
  71    int driMinor;
  72    int driPatch;
  73    int swapAvailable;
  74    int invalidateAvailable;
  75
  76    __glxHashTable *dri2Hash;
  77
  78    const __DRIextension *loader_extensions[4];
  79 };
  80
  81 struct dri2_screen {
  82    struct glx_screen base;
  83
  84    __DRIscreen *driScreen;
  85    __GLXDRIscreen vtable;
  86    const __DRIdri2Extension *dri2;
  87    const __DRIcoreExtension *core;
  88
  89    const __DRI2flushExtension *f;
  90    const __DRI2configQueryExtension *config;
  91    const __DRItexBufferExtension *texBuffer;
  92    const __DRI2throttleExtension *throttle;
  93    const __DRIconfig **driver_configs;
  94
  95    void *driver;
  96    int fd;
  97
  98    Bool show_fps;
  99 };
 100
 101 struct dri2_context
 102 {
 103    struct glx_context base;
 104    __DRIcontext *driContext;
 105 };
 106
 107 struct dri2_drawable
 108 {
 109    __GLXDRIdrawable base;
 110    __DRIdrawable *driDrawable;
 111    __DRIbuffer buffers[5];
 112    int bufferCount;
 113    int width, height;
 114    int have_back;
 115    int have_fake_front;
 116    int swap_interval;
 117
 118    uint64_t previous_time;
 119    unsigned frames;
 120 };
 121
 122 static const struct glx_context_vtable dri2_context_vtable;
 123
 124 /* For XCB's handling of ust/msc/sbc counters, we have to hand it the high and
 125  * low halves separately.  This helps you split them.
 126  */
 127 static void
 128 split_counter(uint64_t counter, uint32_t *hi, uint32_t *lo)
 129 {
 130    *hi = (counter >> 32);
 131    *lo = counter & 0xffffffff;
 132 }
 133
 134 static uint64_t
 135 merge_counter(uint32_t hi, uint32_t lo)
 136 {
 137    return ((uint64_t)hi << 32) | lo;
 138 }
 139
 140 static void
 141 dri2_destroy_context(struct glx_context *context)
 142 {
 143    struct dri2_context *pcp = (struct dri2_context *) context;
 144    struct dri2_screen *psc = (struct dri2_screen *) context->psc;
 145
 146    driReleaseDrawables(&pcp->base);
 147
 148    free((char *) context->extensions);
 149
 150    (*psc->core->destroyContext) (pcp->driContext);
 151
 152    free(pcp);
 153 }
 154
 155 static Bool
 156 dri2_bind_context(struct glx_context *context, struct glx_context *old,
 157                   GLXDrawable draw, GLXDrawable read)
 158 {
 159    struct dri2_context *pcp = (struct dri2_context *) context;
 160    struct dri2_screen *psc = (struct dri2_screen *) pcp->base.psc;
 161    struct dri2_drawable *pdraw, *pread;
 162    struct dri2_display *pdp;
 163
 164    pdraw = (struct dri2_drawable *) driFetchDrawable(context, draw);
 165    pread = (struct dri2_drawable *) driFetchDrawable(context, read);
 166
 167    driReleaseDrawables(&pcp->base);
 168
 169    if (pdraw == NULL || pread == NULL)
 170       return GLXBadDrawable;
 171
 172    if (!(*psc->core->bindContext) (pcp->driContext,
 173                                    pdraw->driDrawable, pread->driDrawable))
 174       return GLXBadContext;
 175
 176    /* If the server doesn't send invalidate events, we may miss a
 177     * resize before the rendering starts.  Invalidate the buffers now
 178     * so the driver will recheck before rendering starts. */
 179    pdp = (struct dri2_display *) psc->base.display;
 180    if (!pdp->invalidateAvailable) {
 181       dri2InvalidateBuffers(psc->base.dpy, pdraw->base.xDrawable);
 182       if (pread != pdraw)
 183          dri2InvalidateBuffers(psc->base.dpy, pread->base.xDrawable);
 184    }
 185
 186    return Success;
 187 }
 188
 189 static void
 190 dri2_unbind_context(struct glx_context *context, struct glx_context *new)
 191 {
 192    struct dri2_context *pcp = (struct dri2_context *) context;
 193    struct dri2_screen *psc = (struct dri2_screen *) pcp->base.psc;
 194
 195    (*psc->core->unbindContext) (pcp->driContext);
 196 }
 197
 198 static struct glx_context *
 199 dri2_create_context(struct glx_screen *base,
 200                     struct glx_config *config_base,
 201                     struct glx_context *shareList, int renderType)
 202 {
 203    struct dri2_context *pcp, *pcp_shared;
 204    struct dri2_screen *psc = (struct dri2_screen *) base;
 205    __GLXDRIconfigPrivate *config = (__GLXDRIconfigPrivate *) config_base;
 206    __DRIcontext *shared = NULL;
 207
 208    if (shareList) {
 209       /* If the shareList context is not a DRI2 context, we cannot possibly
 210        * create a DRI2 context that shares it.
 211        */
 212       if (shareList->vtable->destroy != dri2_destroy_context) {
 213          return NULL;
 214       }
 215
 216       pcp_shared = (struct dri2_context *) shareList;
 217       shared = pcp_shared->driContext;
 218    }
 219
 220    pcp = calloc(1, sizeof *pcp);
 221    if (pcp == NULL)
 222       return NULL;
 223
 224    if (!glx_context_init(&pcp->base, &psc->base, &config->base)) {
 225       free(pcp);
 226       return NULL;
 227    }
 228
 229    pcp->driContext =
 230       (*psc->dri2->createNewContext) (psc->driScreen,
 231                                       config->driConfig, shared, pcp);
 232
 233    if (pcp->driContext == NULL) {
 234       free(pcp);
 235       return NULL;
 236    }
 237
 238    pcp->base.vtable = &dri2_context_vtable;
 239
 240    return &pcp->base;
 241 }
 242
 243 static struct glx_context *
 244 dri2_create_context_attribs(struct glx_screen *base,
 245                             struct glx_config *config_base,
 246                             struct glx_context *shareList,
 247                             unsigned num_attribs,
 248                             const uint32_t *attribs,
 249                             unsigned *error)
 250 {
 251    struct dri2_context *pcp = NULL;
 252    struct dri2_context *pcp_shared = NULL;
 253    struct dri2_screen *psc = (struct dri2_screen *) base;
 254    __GLXDRIconfigPrivate *config = (__GLXDRIconfigPrivate *) config_base;
 255    __DRIcontext *shared = NULL;
 256
 257    uint32_t minor_ver = 1;
 258    uint32_t major_ver = 2;
 259    uint32_t flags = 0;
 260    unsigned api;
 261    int reset = __DRI_CTX_RESET_NO_NOTIFICATION;
 262    uint32_t ctx_attribs[2 * 5];
 263    unsigned num_ctx_attribs = 0;
 264
 265    if (psc->dri2->base.version < 3) {
 266       *error = __DRI_CTX_ERROR_NO_MEMORY;
 267       goto error_exit;
 268    }
 269
 270    /* Remap the GLX tokens to DRI2 tokens.
 271     */
 272    if (!dri2_convert_glx_attribs(num_attribs, attribs,
 273                                  &major_ver, &minor_ver, &flags, &api, &reset,
 274                                  error))
 275       goto error_exit;
 276
 277    if (shareList) {
 278       pcp_shared = (struct dri2_context *) shareList;
 279       shared = pcp_shared->driContext;
 280    }
 281
 282    pcp = calloc(1, sizeof *pcp);
 283    if (pcp == NULL) {
 284       *error = __DRI_CTX_ERROR_NO_MEMORY;
 285       goto error_exit;
 286    }
 287
 288    if (!glx_context_init(&pcp->base, &psc->base, &config->base))
 289       goto error_exit;
 290
 291    ctx_attribs[num_ctx_attribs++] = __DRI_CTX_ATTRIB_MAJOR_VERSION;
 292    ctx_attribs[num_ctx_attribs++] = major_ver;
 293    ctx_attribs[num_ctx_attribs++] = __DRI_CTX_ATTRIB_MINOR_VERSION;
 294    ctx_attribs[num_ctx_attribs++] = minor_ver;
 295
 296    /* Only send a value when the non-default value is requested.  By doing
 297     * this we don't have to check the driver's DRI2 version before sending the
 298     * default value.
 299     */
 300    if (reset != __DRI_CTX_RESET_NO_NOTIFICATION) {
 301       ctx_attribs[num_ctx_attribs++] = __DRI_CTX_ATTRIB_RESET_STRATEGY;
 302       ctx_attribs[num_ctx_attribs++] = reset;
 303    }
 304
 305    if (flags != 0) {
 306       ctx_attribs[num_ctx_attribs++] = __DRI_CTX_ATTRIB_FLAGS;
 307
 308       /* The current __DRI_CTX_FLAG_* values are identical to the
 309        * GLX_CONTEXT_*_BIT values.
 310        */
 311       ctx_attribs[num_ctx_attribs++] = flags;
 312    }
 313
 314    pcp->driContext =
 315       (*psc->dri2->createContextAttribs) (psc->driScreen,
 316                                           api,
 317                                           config->driConfig,
 318                                           shared,
 319                                           num_ctx_attribs / 2,
 320                                           ctx_attribs,
 321                                           error,
 322                                           pcp);
 323
 324    if (pcp->driContext == NULL)
 325       goto error_exit;
 326
 327    pcp->base.vtable = &dri2_context_vtable;
 328
 329    return &pcp->base;
 330
 331 error_exit:
 332    free(pcp);
 333
 334    return NULL;
 335 }
 336
 337 static void
 338 dri2DestroyDrawable(__GLXDRIdrawable *base)
 339 {
 340    struct dri2_screen *psc = (struct dri2_screen *) base->psc;
 341    struct dri2_drawable *pdraw = (struct dri2_drawable *) base;
 342    struct glx_display *dpyPriv = psc->base.display;
 343    struct dri2_display *pdp = (struct dri2_display *)dpyPriv->dri2Display;
 344
 345    __glxHashDelete(pdp->dri2Hash, pdraw->base.xDrawable);
 346    (*psc->core->destroyDrawable) (pdraw->driDrawable);
 347
 348    /* If it's a GLX 1.3 drawables, we can destroy the DRI2 drawable
 349     * now, as the application explicitly asked to destroy the GLX
 350     * drawable.  Otherwise, for legacy drawables, we let the DRI2
 351     * drawable linger on the server, since there's no good way of
 352     * knowing when the application is done with it.  The server will
 353     * destroy the DRI2 drawable when it destroys the X drawable or the
 354     * client exits anyway. */
 355    if (pdraw->base.xDrawable != pdraw->base.drawable)
 356       DRI2DestroyDrawable(psc->base.dpy, pdraw->base.xDrawable);
 357
 358    free(pdraw);
 359 }
 360
 361 static __GLXDRIdrawable *
 362 dri2CreateDrawable(struct glx_screen *base, XID xDrawable,
 363                    GLXDrawable drawable, struct glx_config *config_base)
 364 {
 365    struct dri2_drawable *pdraw;
 366    struct dri2_screen *psc = (struct dri2_screen *) base;
 367    __GLXDRIconfigPrivate *config = (__GLXDRIconfigPrivate *) config_base;
 368    struct glx_display *dpyPriv;
 369    struct dri2_display *pdp;
 370    GLint vblank_mode = DRI_CONF_VBLANK_DEF_INTERVAL_1;
 371
 372    pdraw = calloc(1, sizeof(*pdraw));
 373    if (!pdraw)
 374       return NULL;
 375
 376    pdraw->base.destroyDrawable = dri2DestroyDrawable;
 377    pdraw->base.xDrawable = xDrawable;
 378    pdraw->base.drawable = drawable;
 379    pdraw->base.psc = &psc->base;
 380    pdraw->bufferCount = 0;
 381    pdraw->swap_interval = 1; /* default may be overridden below */
 382    pdraw->have_back = 0;
 383
 384    if (psc->config)
 385       psc->config->configQueryi(psc->driScreen,
 386                                 "vblank_mode", &vblank_mode);
 387
 388    switch (vblank_mode) {
 389    case DRI_CONF_VBLANK_NEVER:
 390    case DRI_CONF_VBLANK_DEF_INTERVAL_0:
 391       pdraw->swap_interval = 0;
 392       break;
 393    case DRI_CONF_VBLANK_DEF_INTERVAL_1:
 394    case DRI_CONF_VBLANK_ALWAYS_SYNC:
 395    default:
 396       pdraw->swap_interval = 1;
 397       break;
 398    }
 399
 400    DRI2CreateDrawable(psc->base.dpy, xDrawable);
 401
 402    dpyPriv = __glXInitialize(psc->base.dpy);
 403    pdp = (struct dri2_display *)dpyPriv->dri2Display;;
 404    /* Create a new drawable */
 405    pdraw->driDrawable =
 406       (*psc->dri2->createNewDrawable) (psc->driScreen,
 407                                        config->driConfig, pdraw);
 408
 409    if (!pdraw->driDrawable) {
 410       DRI2DestroyDrawable(psc->base.dpy, xDrawable);
 411       free(pdraw);
 412       return NULL;
 413    }
 414
 415    if (__glxHashInsert(pdp->dri2Hash, xDrawable, pdraw)) {
 416       (*psc->core->destroyDrawable) (pdraw->driDrawable);
 417       DRI2DestroyDrawable(psc->base.dpy, xDrawable);
 418       free(pdraw);
 419       return None;
 420    }
 421
 422
 423 #ifdef X_DRI2SwapInterval
 424    /*
 425     * Make sure server has the same swap interval we do for the new
 426     * drawable.
 427     */
 428    if (pdp->swapAvailable)
 429       DRI2SwapInterval(psc->base.dpy, xDrawable, pdraw->swap_interval);
 430 #endif
 431
 432    return &pdraw->base;
 433 }
 434
 435 static int
 436 dri2DrawableGetMSC(struct glx_screen *psc, __GLXDRIdrawable *pdraw,
 437                    int64_t *ust, int64_t *msc, int64_t *sbc)
 438 {
 439    xcb_connection_t *c = XGetXCBConnection(pdraw->psc->dpy);
 440    xcb_dri2_get_msc_cookie_t get_msc_cookie;
 441    xcb_dri2_get_msc_reply_t *get_msc_reply;
 442
 443    get_msc_cookie = xcb_dri2_get_msc_unchecked(c, pdraw->xDrawable);
 444    get_msc_reply = xcb_dri2_get_msc_reply(c, get_msc_cookie, NULL);
 445    *ust = merge_counter(get_msc_reply->ust_hi, get_msc_reply->ust_lo);
 446    *msc = merge_counter(get_msc_reply->msc_hi, get_msc_reply->msc_lo);
 447    *sbc = merge_counter(get_msc_reply->sbc_hi, get_msc_reply->sbc_lo);
 448    free(get_msc_reply);
 449
 450    return 0;
 451 }
 452
 453 static int
 454 dri2WaitForMSC(__GLXDRIdrawable *pdraw, int64_t target_msc, int64_t divisor,
 455                int64_t remainder, int64_t *ust, int64_t *msc, int64_t *sbc)
 456 {
 457    xcb_connection_t *c = XGetXCBConnection(pdraw->psc->dpy);
 458    xcb_dri2_wait_msc_cookie_t wait_msc_cookie;
 459    xcb_dri2_wait_msc_reply_t *wait_msc_reply;
 460    uint32_t target_msc_hi, target_msc_lo;
 461    uint32_t divisor_hi, divisor_lo;
 462    uint32_t remainder_hi, remainder_lo;
 463
 464    split_counter(target_msc, &target_msc_hi, &target_msc_lo);
 465    split_counter(divisor, &divisor_hi, &divisor_lo);
 466    split_counter(remainder, &remainder_hi, &remainder_lo);
 467
 468    wait_msc_cookie = xcb_dri2_wait_msc_unchecked(c, pdraw->xDrawable,
 469                                                  target_msc_hi, target_msc_lo,
 470                                                  divisor_hi, divisor_lo,
 471                                                  remainder_hi, remainder_lo);
 472    wait_msc_reply = xcb_dri2_wait_msc_reply(c, wait_msc_cookie, NULL);
 473    *ust = merge_counter(wait_msc_reply->ust_hi, wait_msc_reply->ust_lo);
 474    *msc = merge_counter(wait_msc_reply->msc_hi, wait_msc_reply->msc_lo);
 475    *sbc = merge_counter(wait_msc_reply->sbc_hi, wait_msc_reply->sbc_lo);
 476    free(wait_msc_reply);
 477
 478    return 0;
 479 }
 480
 481 static int
 482 dri2WaitForSBC(__GLXDRIdrawable *pdraw, int64_t target_sbc, int64_t *ust,
 483                int64_t *msc, int64_t *sbc)
 484 {
 485    xcb_connection_t *c = XGetXCBConnection(pdraw->psc->dpy);
 486    xcb_dri2_wait_sbc_cookie_t wait_sbc_cookie;
 487    xcb_dri2_wait_sbc_reply_t *wait_sbc_reply;
 488    uint32_t target_sbc_hi, target_sbc_lo;
 489
 490    split_counter(target_sbc, &target_sbc_hi, &target_sbc_lo);
 491
 492    wait_sbc_cookie = xcb_dri2_wait_sbc_unchecked(c, pdraw->xDrawable,
 493                                                  target_sbc_hi, target_sbc_lo);
 494    wait_sbc_reply = xcb_dri2_wait_sbc_reply(c, wait_sbc_cookie, NULL);
 495    *ust = merge_counter(wait_sbc_reply->ust_hi, wait_sbc_reply->ust_lo);
 496    *msc = merge_counter(wait_sbc_reply->msc_hi, wait_sbc_reply->msc_lo);
 497    *sbc = merge_counter(wait_sbc_reply->sbc_hi, wait_sbc_reply->sbc_lo);
 498    free(wait_sbc_reply);
 499
 500    return 0;
 501 }
 502
 503 /**
 504  * dri2Throttle - Request driver throttling
 505  *
 506  * This function uses the DRI2 throttle extension to give the
 507  * driver the opportunity to throttle on flush front, copysubbuffer
 508  * and swapbuffers.
 509  */
 510 static void
 511 dri2Throttle(struct dri2_screen *psc,
 512              struct dri2_drawable *draw,
 513              enum __DRI2throttleReason reason)
 514 {
 515    if (psc->throttle) {
 516       struct glx_context *gc = __glXGetCurrentContext();
 517       struct dri2_context *dri2Ctx = (struct dri2_context *)gc;
 518       __DRIcontext *ctx =
 519          (dri2Ctx) ? dri2Ctx->driContext : NULL;
 520
 521       psc->throttle->throttle(ctx, draw->driDrawable, reason);
 522    }
 523 }
 524
 525 static void
 526 __dri2CopySubBuffer(__GLXDRIdrawable *pdraw, int x, int y,
 527                     int width, int height,
 528                     enum __DRI2throttleReason reason)
 529 {
 530    struct dri2_drawable *priv = (struct dri2_drawable *) pdraw;
 531    struct dri2_screen *psc = (struct dri2_screen *) pdraw->psc;
 532    XRectangle xrect;
 533    XserverRegion region;
 534
 535    /* Check we have the right attachments */
 536    if (!priv->have_back)
 537       return;
 538
 539    xrect.x = x;
 540    xrect.y = priv->height - y - height;
 541    xrect.width = width;
 542    xrect.height = height;
 543
 544    if (psc->f)
 545       (*psc->f->flush) (priv->driDrawable);
 546
 547    dri2Throttle(psc, priv, reason);
 548
 549    region = XFixesCreateRegion(psc->base.dpy, &xrect, 1);
 550    DRI2CopyRegion(psc->base.dpy, pdraw->xDrawable, region,
 551                   DRI2BufferFrontLeft, DRI2BufferBackLeft);
 552
 553    /* Refresh the fake front (if present) after we just damaged the real
 554     * front.
 555     */
 556    if (priv->have_fake_front)
 557       DRI2CopyRegion(psc->base.dpy, pdraw->xDrawable, region,
 558                      DRI2BufferFakeFrontLeft, DRI2BufferFrontLeft);
 559
 560    XFixesDestroyRegion(psc->base.dpy, region);
 561 }
 562
 563 static void
 564 dri2CopySubBuffer(__GLXDRIdrawable *pdraw, int x, int y,
 565                   int width, int height)
 566 {
 567    __dri2CopySubBuffer(pdraw, x, y, width, height,
 568                        __DRI2_THROTTLE_COPYSUBBUFFER);
 569 }
 570
 571
 572 static void
 573 dri2_copy_drawable(struct dri2_drawable *priv, int dest, int src)
 574 {
 575    XRectangle xrect;
 576    XserverRegion region;
 577    struct dri2_screen *psc = (struct dri2_screen *) priv->base.psc;
 578
 579    xrect.x = 0;
 580    xrect.y = 0;
 581    xrect.width = priv->width;
 582    xrect.height = priv->height;
 583
 584    if (psc->f)
 585       (*psc->f->flush) (priv->driDrawable);
 586
 587    region = XFixesCreateRegion(psc->base.dpy, &xrect, 1);
 588    DRI2CopyRegion(psc->base.dpy, priv->base.xDrawable, region, dest, src);
 589    XFixesDestroyRegion(psc->base.dpy, region);
 590
 591 }
 592
 593 static void
 594 dri2_wait_x(struct glx_context *gc)
 595 {
 596    struct dri2_drawable *priv = (struct dri2_drawable *)
 597       GetGLXDRIDrawable(gc->currentDpy, gc->currentDrawable);
 598
 599    if (priv == NULL || !priv->have_fake_front)
 600       return;
 601
 602    dri2_copy_drawable(priv, DRI2BufferFakeFrontLeft, DRI2BufferFrontLeft);
 603 }
 604
 605 static void
 606 dri2_wait_gl(struct glx_context *gc)
 607 {
 608    struct dri2_drawable *priv = (struct dri2_drawable *)
 609       GetGLXDRIDrawable(gc->currentDpy, gc->currentDrawable);
 610
 611    if (priv == NULL || !priv->have_fake_front)
 612       return;
 613
 614    dri2_copy_drawable(priv, DRI2BufferFrontLeft, DRI2BufferFakeFrontLeft);
 615 }
 616
 617 static void
 618 dri2FlushFrontBuffer(__DRIdrawable *driDrawable, void *loaderPrivate)
 619 {
 620    struct glx_display *priv;
 621    struct dri2_display *pdp;
 622    struct glx_context *gc;
 623    struct dri2_drawable *pdraw = loaderPrivate;
 624    struct dri2_screen *psc;
 625
 626    if (!pdraw)
 627       return;
 628
 629    if (!pdraw->base.psc)
 630       return;
 631
 632    psc = (struct dri2_screen *) pdraw->base.psc;
 633
 634    priv = __glXInitialize(psc->base.dpy);
 635    pdp = (struct dri2_display *) priv->dri2Display;
 636    gc = __glXGetCurrentContext();
 637
 638    dri2Throttle(psc, pdraw, __DRI2_THROTTLE_FLUSHFRONT);
 639
 640    /* Old servers don't send invalidate events */
 641    if (!pdp->invalidateAvailable)
 642        dri2InvalidateBuffers(priv->dpy, pdraw->base.xDrawable);
 643
 644    dri2_wait_gl(gc);
 645 }
 646
 647
 648 static void
 649 dri2DestroyScreen(struct glx_screen *base)
 650 {
 651    struct dri2_screen *psc = (struct dri2_screen *) base;
 652
 653    /* Free the direct rendering per screen data */
 654    (*psc->core->destroyScreen) (psc->driScreen);
 655    driDestroyConfigs(psc->driver_configs);
 656    close(psc->fd);
 657    free(psc);
 658 }
 659
 660 /**
 661  * Process list of buffer received from the server
 662  *
 663  * Processes the list of buffers received in a reply from the server to either
 664  * \c DRI2GetBuffers or \c DRI2GetBuffersWithFormat.
 665  */
 666 static void
 667 process_buffers(struct dri2_drawable * pdraw, DRI2Buffer * buffers,
 668                 unsigned count)
 669 {
 670    int i;
 671
 672    pdraw->bufferCount = count;
 673    pdraw->have_fake_front = 0;
 674    pdraw->have_back = 0;
 675
 676    /* This assumes the DRI2 buffer attachment tokens matches the
 677     * __DRIbuffer tokens. */
 678    for (i = 0; i < count; i++) {
 679       pdraw->buffers[i].attachment = buffers[i].attachment;
 680       pdraw->buffers[i].name = buffers[i].name;
 681       pdraw->buffers[i].pitch = buffers[i].pitch;
 682       pdraw->buffers[i].cpp = buffers[i].cpp;
 683       pdraw->buffers[i].flags = buffers[i].flags;
 684       if (pdraw->buffers[i].attachment == __DRI_BUFFER_FAKE_FRONT_LEFT)
 685          pdraw->have_fake_front = 1;
 686       if (pdraw->buffers[i].attachment == __DRI_BUFFER_BACK_LEFT)
 687          pdraw->have_back = 1;
 688    }
 689
 690 }
 691
 692 unsigned dri2GetSwapEventType(Display* dpy, XID drawable)
 693 {
 694       struct glx_display *glx_dpy = __glXInitialize(dpy);
 695       __GLXDRIdrawable *pdraw;
 696       pdraw = dri2GetGlxDrawableFromXDrawableId(dpy, drawable);
 697       if (!pdraw || !(pdraw->eventMask & GLX_BUFFER_SWAP_COMPLETE_INTEL_MASK))
 698          return 0;
 699       return glx_dpy->codes->first_event + GLX_BufferSwapComplete;
 700 }
 701
 702 static void show_fps(struct dri2_drawable *draw)
 703 {
 704    struct timeval tv;
 705    uint64_t current_time;
 706
 707    gettimeofday(&tv, 0);
 708    current_time = (uint64_t)tv.tv_sec*1000000 + (uint64_t)tv.tv_usec;
 709
 710    draw->frames++;
 711
 712    if (draw->previous_time + 1000000 <= current_time) {
 713       if (draw->previous_time) {
 714          fprintf(stderr, "libGL: FPS = %.1f\n",
 715                  ((uint64_t)draw->frames * 1000000) /
 716                  (double)(current_time - draw->previous_time));
 717       }
 718       draw->frames = 0;
 719       draw->previous_time = current_time;
 720    }
 721 }
 722
 723 static int64_t
 724 dri2SwapBuffers(__GLXDRIdrawable *pdraw, int64_t target_msc, int64_t divisor,
 725                 int64_t remainder)
 726 {
 727     struct dri2_drawable *priv = (struct dri2_drawable *) pdraw;
 728     struct glx_display *dpyPriv = __glXInitialize(priv->base.psc->dpy);
 729     struct dri2_screen *psc = (struct dri2_screen *) priv->base.psc;
 730     struct dri2_display *pdp =
 731         (struct dri2_display *)dpyPriv->dri2Display;
 732     CARD64 ret = 0;
 733
 734     /* Check we have the right attachments */
 735     if (!priv->have_back)
 736         return ret;
 737
 738     /* Old servers can't handle swapbuffers */
 739     if (!pdp->swapAvailable) {
 740        __dri2CopySubBuffer(pdraw, 0, 0, priv->width, priv->height,
 741                            __DRI2_THROTTLE_SWAPBUFFER);
 742     } else {
 743 #ifdef X_DRI2SwapBuffers
 744     if (psc->f) {
 745        struct glx_context *gc = __glXGetCurrentContext();
 746
 747        if (gc) {
 748           (*psc->f->flush)(priv->driDrawable);
 749        }
 750     }
 751
 752        dri2Throttle(psc, priv, __DRI2_THROTTLE_SWAPBUFFER);
 753
 754        DRI2SwapBuffers(psc->base.dpy, pdraw->xDrawable,
 755                        target_msc, divisor, remainder, &ret);
 756 #endif
 757     }
 758
 759     if (psc->show_fps) {
 760        show_fps(priv);
 761     }
 762
 763     /* Old servers don't send invalidate events */
 764     if (!pdp->invalidateAvailable)
 765        dri2InvalidateBuffers(dpyPriv->dpy, pdraw->xDrawable);
 766
 767     return ret;
 768 }
 769
 770 static __DRIbuffer *
 771 dri2GetBuffers(__DRIdrawable * driDrawable,
 772                int *width, int *height,
 773                unsigned int *attachments, int count,
 774                int *out_count, void *loaderPrivate)
 775 {
 776    struct dri2_drawable *pdraw = loaderPrivate;
 777    DRI2Buffer *buffers;
 778
 779    buffers = DRI2GetBuffers(pdraw->base.psc->dpy, pdraw->base.xDrawable,
 780                             width, height, attachments, count, out_count);
 781    if (buffers == NULL)
 782       return NULL;
 783
 784    pdraw->width = *width;
 785    pdraw->height = *height;
 786    process_buffers(pdraw, buffers, *out_count);
 787
 788    free(buffers);
 789
 790    return pdraw->buffers;
 791 }
 792
 793 static __DRIbuffer *
 794 dri2GetBuffersWithFormat(__DRIdrawable * driDrawable,
 795                          int *width, int *height,
 796                          unsigned int *attachments, int count,
 797                          int *out_count, void *loaderPrivate)
 798 {
 799    struct dri2_drawable *pdraw = loaderPrivate;
 800    DRI2Buffer *buffers;
 801
 802    buffers = DRI2GetBuffersWithFormat(pdraw->base.psc->dpy,
 803                                       pdraw->base.xDrawable,
 804                                       width, height, attachments,
 805                                       count, out_count);
 806    if (buffers == NULL)
 807       return NULL;
 808
 809    pdraw->width = *width;
 810    pdraw->height = *height;
 811    process_buffers(pdraw, buffers, *out_count);
 812
 813    free(buffers);
 814
 815    return pdraw->buffers;
 816 }
 817
 818 #ifdef X_DRI2SwapInterval
 819
 820 static int
 821 dri2SetSwapInterval(__GLXDRIdrawable *pdraw, int interval)
 822 {
 823    struct dri2_drawable *priv =  (struct dri2_drawable *) pdraw;
 824    GLint vblank_mode = DRI_CONF_VBLANK_DEF_INTERVAL_1;
 825    struct dri2_screen *psc = (struct dri2_screen *) priv->base.psc;
 826
 827    if (psc->config)
 828       psc->config->configQueryi(psc->driScreen,
 829                                 "vblank_mode", &vblank_mode);
 830
 831    switch (vblank_mode) {
 832    case DRI_CONF_VBLANK_NEVER:
 833       return GLX_BAD_VALUE;
 834    case DRI_CONF_VBLANK_ALWAYS_SYNC:
 835       if (interval <= 0)
 836          return GLX_BAD_VALUE;
 837       break;
 838    default:
 839       break;
 840    }
 841
 842    DRI2SwapInterval(priv->base.psc->dpy, priv->base.xDrawable, interval);
 843    priv->swap_interval = interval;
 844
 845    return 0;
 846 }
 847
 848 static int
 849 dri2GetSwapInterval(__GLXDRIdrawable *pdraw)
 850 {
 851    struct dri2_drawable *priv =  (struct dri2_drawable *) pdraw;
 852
 853   return priv->swap_interval;
 854 }
 855
 856 #endif /* X_DRI2SwapInterval */
 857
 858 static const __DRIdri2LoaderExtension dri2LoaderExtension = {
 859    {__DRI_DRI2_LOADER, __DRI_DRI2_LOADER_VERSION},
 860    dri2GetBuffers,
 861    dri2FlushFrontBuffer,
 862    dri2GetBuffersWithFormat,
 863 };
 864
 865 static const __DRIdri2LoaderExtension dri2LoaderExtension_old = {
 866    {__DRI_DRI2_LOADER, __DRI_DRI2_LOADER_VERSION},
 867    dri2GetBuffers,
 868    dri2FlushFrontBuffer,
 869    NULL,
 870 };
 871
 872 static const __DRIuseInvalidateExtension dri2UseInvalidate = {
 873    { __DRI_USE_INVALIDATE, __DRI_USE_INVALIDATE_VERSION }
 874 };
 875
 876 _X_HIDDEN void
 877 dri2InvalidateBuffers(Display *dpy, XID drawable)
 878 {
 879    __GLXDRIdrawable *pdraw =
 880       dri2GetGlxDrawableFromXDrawableId(dpy, drawable);
 881    struct dri2_screen *psc;
 882    struct dri2_drawable *pdp = (struct dri2_drawable *) pdraw;
 883
 884    if (!pdraw)
 885       return;
 886
 887    psc = (struct dri2_screen *) pdraw->psc;
 888
 889    if (pdraw && psc->f && psc->f->base.version >= 3 && psc->f->invalidate)
 890        psc->f->invalidate(pdp->driDrawable);
 891 }
 892
 893 static void
 894 dri2_bind_tex_image(Display * dpy,
 895                     GLXDrawable drawable,
 896                     int buffer, const int *attrib_list)
 897 {
 898    struct glx_context *gc = __glXGetCurrentContext();
 899    struct dri2_context *pcp = (struct dri2_context *) gc;
 900    __GLXDRIdrawable *base = GetGLXDRIDrawable(dpy, drawable);
 901    struct glx_display *dpyPriv = __glXInitialize(dpy);
 902    struct dri2_drawable *pdraw = (struct dri2_drawable *) base;
 903    struct dri2_display *pdp =
 904       (struct dri2_display *) dpyPriv->dri2Display;
 905    struct dri2_screen *psc;
 906
 907    if (pdraw != NULL) {
 908       psc = (struct dri2_screen *) base->psc;
 909
 910       if (!pdp->invalidateAvailable && psc->f &&
 911            psc->f->base.version >= 3 && psc->f->invalidate)
 912          psc->f->invalidate(pdraw->driDrawable);
 913
 914       if (psc->texBuffer->base.version >= 2 &&
 915           psc->texBuffer->setTexBuffer2 != NULL) {
 916          (*psc->texBuffer->setTexBuffer2) (pcp->driContext,
 917                                            pdraw->base.textureTarget,
 918                                            pdraw->base.textureFormat,
 919                                            pdraw->driDrawable);
 920       }
 921       else {
 922          (*psc->texBuffer->setTexBuffer) (pcp->driContext,
 923                                           pdraw->base.textureTarget,
 924                                           pdraw->driDrawable);
 925       }
 926    }
 927 }
 928
 929 static void
 930 dri2_release_tex_image(Display * dpy, GLXDrawable drawable, int buffer)
 931 {
 932 #if __DRI_TEX_BUFFER_VERSION >= 3
 933    struct glx_context *gc = __glXGetCurrentContext();
 934    struct dri2_context *pcp = (struct dri2_context *) gc;
 935    __GLXDRIdrawable *base = GetGLXDRIDrawable(dpy, drawable);
 936    struct glx_display *dpyPriv = __glXInitialize(dpy);
 937    struct dri2_drawable *pdraw = (struct dri2_drawable *) base;
 938    struct dri2_display *pdp =
 939       (struct dri2_display *) dpyPriv->dri2Display;
 940    struct dri2_screen *psc;
 941
 942    if (pdraw != NULL) {
 943       psc = (struct dri2_screen *) base->psc;
 944
 945       if (psc->texBuffer->base.version >= 3 &&
 946           psc->texBuffer->releaseTexBuffer != NULL) {
 947          (*psc->texBuffer->releaseTexBuffer) (pcp->driContext,
 948                                            pdraw->base.textureTarget,
 949                                            pdraw->driDrawable);
 950       }
 951    }
 952 #endif
 953 }
 954
 955 static const struct glx_context_vtable dri2_context_vtable = {
 956    dri2_destroy_context,
 957    dri2_bind_context,
 958    dri2_unbind_context,
 959    dri2_wait_gl,
 960    dri2_wait_x,
 961    DRI_glXUseXFont,
 962    dri2_bind_tex_image,
 963    dri2_release_tex_image,
 964    NULL, /* get_proc_address */
 965 };
 966
 967 static void
 968 dri2BindExtensions(struct dri2_screen *psc, const __DRIextension **extensions)
 969 {
 970    int i;
 971
 972    __glXEnableDirectExtension(&psc->base, "GLX_SGI_video_sync");
 973    __glXEnableDirectExtension(&psc->base, "GLX_SGI_swap_control");
 974    __glXEnableDirectExtension(&psc->base, "GLX_MESA_swap_control");
 975    __glXEnableDirectExtension(&psc->base, "GLX_SGI_make_current_read");
 976
 977    /* FIXME: if DRI2 version supports it... */
 978    __glXEnableDirectExtension(&psc->base, "INTEL_swap_event");
 979
 980    if (psc->dri2->base.version >= 3) {
 981       const unsigned mask = psc->dri2->getAPIMask(psc->driScreen);
 982
 983       __glXEnableDirectExtension(&psc->base, "GLX_ARB_create_context");
 984       __glXEnableDirectExtension(&psc->base, "GLX_ARB_create_context_profile");
 985
 986       if ((mask & (1 << __DRI_API_GLES2)) != 0)
 987          __glXEnableDirectExtension(&psc->base,
 988                                     "GLX_EXT_create_context_es2_profile");
 989    }
 990
 991    for (i = 0; extensions[i]; i++) {
 992       if ((strcmp(extensions[i]->name, __DRI_TEX_BUFFER) == 0)) {
 993          psc->texBuffer = (__DRItexBufferExtension *) extensions[i];
 994          __glXEnableDirectExtension(&psc->base, "GLX_EXT_texture_from_pixmap");
 995       }
 996
 997       if ((strcmp(extensions[i]->name, __DRI2_FLUSH) == 0)) {
 998          psc->f = (__DRI2flushExtension *) extensions[i];
 999          /* internal driver extension, no GL extension exposed */
1000       }
1001
1002       if ((strcmp(extensions[i]->name, __DRI2_CONFIG_QUERY) == 0))
1003          psc->config = (__DRI2configQueryExtension *) extensions[i];
1004
1005       if (((strcmp(extensions[i]->name, __DRI2_THROTTLE) == 0)))
1006          psc->throttle = (__DRI2throttleExtension *) extensions[i];
1007
1008       /* DRI2 version 3 is also required because
1009        * GLX_ARB_create_context_robustness requires GLX_ARB_create_context.
1010        */
1011       if (psc->dri2->base.version >= 3
1012           && strcmp(extensions[i]->name, __DRI2_ROBUSTNESS) == 0)
1013          __glXEnableDirectExtension(&psc->base,
1014                                     "GLX_ARB_create_context_robustness");
1015    }
1016 }
1017
1018 static const struct glx_screen_vtable dri2_screen_vtable = {
1019    dri2_create_context,
1020    dri2_create_context_attribs
1021 };
1022
1023 static struct glx_screen *
1024 dri2CreateScreen(int screen, struct glx_display * priv)
1025 {
1026    const __DRIconfig **driver_configs;
1027    const __DRIextension **extensions;
1028    const struct dri2_display *const pdp = (struct dri2_display *)
1029       priv->dri2Display;
1030    struct dri2_screen *psc;
1031    __GLXDRIscreen *psp;
1032    struct glx_config *configs = NULL, *visuals = NULL;
1033    char *driverName, *deviceName, *tmp;
1034    drm_magic_t magic;
1035    int i;
1036
1037    psc = calloc(1, sizeof *psc);
1038    if (psc == NULL)
1039       return NULL;
1040
1041    psc->fd = -1;
1042
1043    if (!glx_screen_init(&psc->base, screen, priv)) {
1044       free(psc);
1045       return NULL;
1046    }
1047
1048    if (!DRI2Connect(priv->dpy, RootWindow(priv->dpy, screen),
1049                     &driverName, &deviceName)) {
1050       glx_screen_cleanup(&psc->base);
1051       free(psc);
1052       InfoMessageF("screen %d does not appear to be DRI2 capable\n", screen);
1053       return NULL;
1054    }
1055
1056    psc->driver = driOpenDriver(driverName);
1057    if (psc->driver == NULL) {
1058       ErrorMessageF("driver pointer missing\n");
1059       goto handle_error;
1060    }
1061
1062    extensions = dlsym(psc->driver, __DRI_DRIVER_EXTENSIONS);
1063    if (extensions == NULL) {
1064       ErrorMessageF("driver exports no extensions (%s)\n", dlerror());
1065       goto handle_error;
1066    }
1067
1068    for (i = 0; extensions[i]; i++) {
1069       if (strcmp(extensions[i]->name, __DRI_CORE) == 0)
1070          psc->core = (__DRIcoreExtension *) extensions[i];
1071       if (strcmp(extensions[i]->name, __DRI_DRI2) == 0)
1072          psc->dri2 = (__DRIdri2Extension *) extensions[i];
1073    }
1074
1075    if (psc->core == NULL || psc->dri2 == NULL) {
1076       ErrorMessageF("core dri or dri2 extension not found\n");
1077       goto handle_error;
1078    }
1079
1080 #ifdef O_CLOEXEC
1081    psc->fd = open(deviceName, O_RDWR | O_CLOEXEC);
1082    if (psc->fd == -1 && errno == EINVAL)
1083 #endif
1084    {
1085       psc->fd = open(deviceName, O_RDWR);
1086       if (psc->fd != -1)
1087          fcntl(psc->fd, F_SETFD, fcntl(psc->fd, F_GETFD) | FD_CLOEXEC);
1088    }
1089    if (psc->fd < 0) {
1090       ErrorMessageF("failed to open drm device: %s\n", strerror(errno));
1091       goto handle_error;
1092    }
1093
1094    if (drmGetMagic(psc->fd, &magic)) {
1095       ErrorMessageF("failed to get magic\n");
1096       goto handle_error;
1097    }
1098
1099    if (!DRI2Authenticate(priv->dpy, RootWindow(priv->dpy, screen), magic)) {
1100       ErrorMessageF("failed to authenticate magic %d\n", magic);
1101       goto handle_error;
1102    }
1103
1104
1105    /* If the server does not support the protocol for
1106     * DRI2GetBuffersWithFormat, don't supply that interface to the driver.
1107     */
1108    psc->driScreen =
1109       psc->dri2->createNewScreen(screen, psc->fd,
1110                                  (const __DRIextension **)
1111                                  &pdp->loader_extensions[0],
1112                                  &driver_configs, psc);
1113
1114    if (psc->driScreen == NULL) {
1115       ErrorMessageF("failed to create dri screen\n");
1116       goto handle_error;
1117    }
1118
1119    extensions = psc->core->getExtensions(psc->driScreen);
1120    dri2BindExtensions(psc, extensions);
1121
1122    configs = driConvertConfigs(psc->core, psc->base.configs, driver_configs);
1123    visuals = driConvertConfigs(psc->core, psc->base.visuals, driver_configs);
1124
1125    if (!configs || !visuals)
1126        goto handle_error;
1127
1128    glx_config_destroy_list(psc->base.configs);
1129    psc->base.configs = configs;
1130    glx_config_destroy_list(psc->base.visuals);
1131    psc->base.visuals = visuals;
1132
1133    psc->driver_configs = driver_configs;
1134
1135    psc->base.vtable = &dri2_screen_vtable;
1136    psp = &psc->vtable;
1137    psc->base.driScreen = psp;
1138    psp->destroyScreen = dri2DestroyScreen;
1139    psp->createDrawable = dri2CreateDrawable;
1140    psp->swapBuffers = dri2SwapBuffers;
1141    psp->getDrawableMSC = NULL;
1142    psp->waitForMSC = NULL;
1143    psp->waitForSBC = NULL;
1144    psp->setSwapInterval = NULL;
1145    psp->getSwapInterval = NULL;
1146
1147    if (pdp->driMinor >= 2) {
1148       psp->getDrawableMSC = dri2DrawableGetMSC;
1149       psp->waitForMSC = dri2WaitForMSC;
1150       psp->waitForSBC = dri2WaitForSBC;
1151 #ifdef X_DRI2SwapInterval
1152       psp->setSwapInterval = dri2SetSwapInterval;
1153       psp->getSwapInterval = dri2GetSwapInterval;
1154 #endif
1155       __glXEnableDirectExtension(&psc->base, "GLX_OML_sync_control");
1156    }
1157
1158    /* DRI2 suports SubBuffer through DRI2CopyRegion, so it's always
1159     * available.*/
1160    psp->copySubBuffer = dri2CopySubBuffer;
1161    __glXEnableDirectExtension(&psc->base, "GLX_MESA_copy_sub_buffer");
1162
1163    free(driverName);
1164    free(deviceName);
1165
1166    tmp = getenv("LIBGL_SHOW_FPS");
1167    psc->show_fps = tmp && strcmp(tmp, "1") == 0;
1168
1169    return &psc->base;
1170
1171 handle_error:
1172    CriticalErrorMessageF("failed to load driver: %s\n", driverName);
1173
1174    if (configs)
1175        glx_config_destroy_list(configs);
1176    if (visuals)
1177        glx_config_destroy_list(visuals);
1178    if (psc->driScreen)
1179        psc->core->destroyScreen(psc->driScreen);
1180    psc->driScreen = NULL;
1181    if (psc->fd >= 0)
1182       close(psc->fd);
1183    if (psc->driver)
1184       dlclose(psc->driver);
1185
1186    free(driverName);
1187    free(deviceName);
1188    glx_screen_cleanup(&psc->base);
1189    free(psc);
1190
1191    return NULL;
1192 }
1193
1194 /* Called from __glXFreeDisplayPrivate.
1195  */
1196 static void
1197 dri2DestroyDisplay(__GLXDRIdisplay * dpy)
1198 {
1199    struct dri2_display *pdp = (struct dri2_display *) dpy;
1200
1201    __glxHashDestroy(pdp->dri2Hash);
1202    free(dpy);
1203 }
1204
1205 _X_HIDDEN __GLXDRIdrawable *
1206 dri2GetGlxDrawableFromXDrawableId(Display *dpy, XID id)
1207 {
1208    struct glx_display *d = __glXInitialize(dpy);
1209    struct dri2_display *pdp = (struct dri2_display *) d->dri2Display;
1210    __GLXDRIdrawable *pdraw;
1211
1212    if (__glxHashLookup(pdp->dri2Hash, id, (void *) &pdraw) == 0)
1213       return pdraw;
1214
1215    return NULL;
1216 }
1217
1218 /*
1219  * Allocate, initialize and return a __DRIdisplayPrivate object.
1220  * This is called from __glXInitialize() when we are given a new
1221  * display pointer.
1222  */
1223 _X_HIDDEN __GLXDRIdisplay *
1224 dri2CreateDisplay(Display * dpy)
1225 {
1226    struct dri2_display *pdp;
1227    int eventBase, errorBase, i;
1228
1229    if (!DRI2QueryExtension(dpy, &eventBase, &errorBase))
1230       return NULL;
1231
1232    pdp = malloc(sizeof *pdp);
1233    if (pdp == NULL)
1234       return NULL;
1235
1236    if (!DRI2QueryVersion(dpy, &pdp->driMajor, &pdp->driMinor)) {
1237       free(pdp);
1238       return NULL;
1239    }
1240
1241    pdp->driPatch = 0;
1242    pdp->swapAvailable = (pdp->driMinor >= 2);
1243    pdp->invalidateAvailable = (pdp->driMinor >= 3);
1244
1245    pdp->base.destroyDisplay = dri2DestroyDisplay;
1246    pdp->base.createScreen = dri2CreateScreen;
1247
1248    i = 0;
1249    if (pdp->driMinor < 1)
1250       pdp->loader_extensions[i++] = &dri2LoaderExtension_old.base;
1251    else
1252       pdp->loader_extensions[i++] = &dri2LoaderExtension.base;
1253
1254    pdp->loader_extensions[i++] = &systemTimeExtension.base;
1255
1256    pdp->loader_extensions[i++] = &dri2UseInvalidate.base;
1257
1258    pdp->loader_extensions[i++] = NULL;
1259
1260    pdp->dri2Hash = __glxHashCreate();
1261    if (pdp->dri2Hash == NULL) {
1262       free(pdp);
1263       return NULL;
1264    }
1265
1266    return &pdp->base;
1267 }
1268
1269 #endif /* GLX_DIRECT_RENDERING */