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     * Make sure server has the same swap interval we do for the new
 424     * drawable.
 425     */
 426    if (psc->vtable.setSwapInterval)
 427       psc->vtable.setSwapInterval(&pdraw->base, pdraw->swap_interval);
 428
 429    return &pdraw->base;
 430 }
 431
 432 static int
 433 dri2DrawableGetMSC(struct glx_screen *psc, __GLXDRIdrawable *pdraw,
 434                    int64_t *ust, int64_t *msc, int64_t *sbc)
 435 {
 436    xcb_connection_t *c = XGetXCBConnection(pdraw->psc->dpy);
 437    xcb_dri2_get_msc_cookie_t get_msc_cookie;
 438    xcb_dri2_get_msc_reply_t *get_msc_reply;
 439
 440    get_msc_cookie = xcb_dri2_get_msc_unchecked(c, pdraw->xDrawable);
 441    get_msc_reply = xcb_dri2_get_msc_reply(c, get_msc_cookie, NULL);
 442    *ust = merge_counter(get_msc_reply->ust_hi, get_msc_reply->ust_lo);
 443    *msc = merge_counter(get_msc_reply->msc_hi, get_msc_reply->msc_lo);
 444    *sbc = merge_counter(get_msc_reply->sbc_hi, get_msc_reply->sbc_lo);
 445    free(get_msc_reply);
 446
 447    return 0;
 448 }
 449
 450 static int
 451 dri2WaitForMSC(__GLXDRIdrawable *pdraw, int64_t target_msc, int64_t divisor,
 452                int64_t remainder, int64_t *ust, int64_t *msc, int64_t *sbc)
 453 {
 454    xcb_connection_t *c = XGetXCBConnection(pdraw->psc->dpy);
 455    xcb_dri2_wait_msc_cookie_t wait_msc_cookie;
 456    xcb_dri2_wait_msc_reply_t *wait_msc_reply;
 457    uint32_t target_msc_hi, target_msc_lo;
 458    uint32_t divisor_hi, divisor_lo;
 459    uint32_t remainder_hi, remainder_lo;
 460
 461    split_counter(target_msc, &target_msc_hi, &target_msc_lo);
 462    split_counter(divisor, &divisor_hi, &divisor_lo);
 463    split_counter(remainder, &remainder_hi, &remainder_lo);
 464
 465    wait_msc_cookie = xcb_dri2_wait_msc_unchecked(c, pdraw->xDrawable,
 466                                                  target_msc_hi, target_msc_lo,
 467                                                  divisor_hi, divisor_lo,
 468                                                  remainder_hi, remainder_lo);
 469    wait_msc_reply = xcb_dri2_wait_msc_reply(c, wait_msc_cookie, NULL);
 470    *ust = merge_counter(wait_msc_reply->ust_hi, wait_msc_reply->ust_lo);
 471    *msc = merge_counter(wait_msc_reply->msc_hi, wait_msc_reply->msc_lo);
 472    *sbc = merge_counter(wait_msc_reply->sbc_hi, wait_msc_reply->sbc_lo);
 473    free(wait_msc_reply);
 474
 475    return 0;
 476 }
 477
 478 static int
 479 dri2WaitForSBC(__GLXDRIdrawable *pdraw, int64_t target_sbc, int64_t *ust,
 480                int64_t *msc, int64_t *sbc)
 481 {
 482    xcb_connection_t *c = XGetXCBConnection(pdraw->psc->dpy);
 483    xcb_dri2_wait_sbc_cookie_t wait_sbc_cookie;
 484    xcb_dri2_wait_sbc_reply_t *wait_sbc_reply;
 485    uint32_t target_sbc_hi, target_sbc_lo;
 486
 487    split_counter(target_sbc, &target_sbc_hi, &target_sbc_lo);
 488
 489    wait_sbc_cookie = xcb_dri2_wait_sbc_unchecked(c, pdraw->xDrawable,
 490                                                  target_sbc_hi, target_sbc_lo);
 491    wait_sbc_reply = xcb_dri2_wait_sbc_reply(c, wait_sbc_cookie, NULL);
 492    *ust = merge_counter(wait_sbc_reply->ust_hi, wait_sbc_reply->ust_lo);
 493    *msc = merge_counter(wait_sbc_reply->msc_hi, wait_sbc_reply->msc_lo);
 494    *sbc = merge_counter(wait_sbc_reply->sbc_hi, wait_sbc_reply->sbc_lo);
 495    free(wait_sbc_reply);
 496
 497    return 0;
 498 }
 499
 500 /**
 501  * dri2Throttle - Request driver throttling
 502  *
 503  * This function uses the DRI2 throttle extension to give the
 504  * driver the opportunity to throttle on flush front, copysubbuffer
 505  * and swapbuffers.
 506  */
 507 static void
 508 dri2Throttle(struct dri2_screen *psc,
 509              struct dri2_drawable *draw,
 510              enum __DRI2throttleReason reason)
 511 {
 512    if (psc->throttle) {
 513       struct glx_context *gc = __glXGetCurrentContext();
 514       struct dri2_context *dri2Ctx = (struct dri2_context *)gc;
 515       __DRIcontext *ctx =
 516          (dri2Ctx) ? dri2Ctx->driContext : NULL;
 517
 518       psc->throttle->throttle(ctx, draw->driDrawable, reason);
 519    }
 520 }
 521
 522 static void
 523 __dri2CopySubBuffer(__GLXDRIdrawable *pdraw, int x, int y,
 524                     int width, int height,
 525                     enum __DRI2throttleReason reason)
 526 {
 527    struct dri2_drawable *priv = (struct dri2_drawable *) pdraw;
 528    struct dri2_screen *psc = (struct dri2_screen *) pdraw->psc;
 529    XRectangle xrect;
 530    XserverRegion region;
 531
 532    /* Check we have the right attachments */
 533    if (!priv->have_back)
 534       return;
 535
 536    xrect.x = x;
 537    xrect.y = priv->height - y - height;
 538    xrect.width = width;
 539    xrect.height = height;
 540
 541    if (psc->f)
 542       (*psc->f->flush) (priv->driDrawable);
 543
 544    dri2Throttle(psc, priv, reason);
 545
 546    region = XFixesCreateRegion(psc->base.dpy, &xrect, 1);
 547    DRI2CopyRegion(psc->base.dpy, pdraw->xDrawable, region,
 548                   DRI2BufferFrontLeft, DRI2BufferBackLeft);
 549
 550    /* Refresh the fake front (if present) after we just damaged the real
 551     * front.
 552     */
 553    if (priv->have_fake_front)
 554       DRI2CopyRegion(psc->base.dpy, pdraw->xDrawable, region,
 555                      DRI2BufferFakeFrontLeft, DRI2BufferFrontLeft);
 556
 557    XFixesDestroyRegion(psc->base.dpy, region);
 558 }
 559
 560 static void
 561 dri2CopySubBuffer(__GLXDRIdrawable *pdraw, int x, int y,
 562                   int width, int height)
 563 {
 564    __dri2CopySubBuffer(pdraw, x, y, width, height,
 565                        __DRI2_THROTTLE_COPYSUBBUFFER);
 566 }
 567
 568
 569 static void
 570 dri2_copy_drawable(struct dri2_drawable *priv, int dest, int src)
 571 {
 572    XRectangle xrect;
 573    XserverRegion region;
 574    struct dri2_screen *psc = (struct dri2_screen *) priv->base.psc;
 575
 576    xrect.x = 0;
 577    xrect.y = 0;
 578    xrect.width = priv->width;
 579    xrect.height = priv->height;
 580
 581    if (psc->f)
 582       (*psc->f->flush) (priv->driDrawable);
 583
 584    region = XFixesCreateRegion(psc->base.dpy, &xrect, 1);
 585    DRI2CopyRegion(psc->base.dpy, priv->base.xDrawable, region, dest, src);
 586    XFixesDestroyRegion(psc->base.dpy, region);
 587
 588 }
 589
 590 static void
 591 dri2_wait_x(struct glx_context *gc)
 592 {
 593    struct dri2_drawable *priv = (struct dri2_drawable *)
 594       GetGLXDRIDrawable(gc->currentDpy, gc->currentDrawable);
 595
 596    if (priv == NULL || !priv->have_fake_front)
 597       return;
 598
 599    dri2_copy_drawable(priv, DRI2BufferFakeFrontLeft, DRI2BufferFrontLeft);
 600 }
 601
 602 static void
 603 dri2_wait_gl(struct glx_context *gc)
 604 {
 605    struct dri2_drawable *priv = (struct dri2_drawable *)
 606       GetGLXDRIDrawable(gc->currentDpy, gc->currentDrawable);
 607
 608    if (priv == NULL || !priv->have_fake_front)
 609       return;
 610
 611    dri2_copy_drawable(priv, DRI2BufferFrontLeft, DRI2BufferFakeFrontLeft);
 612 }
 613
 614 static void
 615 dri2FlushFrontBuffer(__DRIdrawable *driDrawable, void *loaderPrivate)
 616 {
 617    struct glx_display *priv;
 618    struct dri2_display *pdp;
 619    struct glx_context *gc;
 620    struct dri2_drawable *pdraw = loaderPrivate;
 621    struct dri2_screen *psc;
 622
 623    if (!pdraw)
 624       return;
 625
 626    if (!pdraw->base.psc)
 627       return;
 628
 629    psc = (struct dri2_screen *) pdraw->base.psc;
 630
 631    priv = __glXInitialize(psc->base.dpy);
 632    pdp = (struct dri2_display *) priv->dri2Display;
 633    gc = __glXGetCurrentContext();
 634
 635    dri2Throttle(psc, pdraw, __DRI2_THROTTLE_FLUSHFRONT);
 636
 637    /* Old servers don't send invalidate events */
 638    if (!pdp->invalidateAvailable)
 639        dri2InvalidateBuffers(priv->dpy, pdraw->base.xDrawable);
 640
 641    dri2_wait_gl(gc);
 642 }
 643
 644
 645 static void
 646 dri2DestroyScreen(struct glx_screen *base)
 647 {
 648    struct dri2_screen *psc = (struct dri2_screen *) base;
 649
 650    /* Free the direct rendering per screen data */
 651    (*psc->core->destroyScreen) (psc->driScreen);
 652    driDestroyConfigs(psc->driver_configs);
 653    close(psc->fd);
 654    free(psc);
 655 }
 656
 657 /**
 658  * Process list of buffer received from the server
 659  *
 660  * Processes the list of buffers received in a reply from the server to either
 661  * \c DRI2GetBuffers or \c DRI2GetBuffersWithFormat.
 662  */
 663 static void
 664 process_buffers(struct dri2_drawable * pdraw, DRI2Buffer * buffers,
 665                 unsigned count)
 666 {
 667    int i;
 668
 669    pdraw->bufferCount = count;
 670    pdraw->have_fake_front = 0;
 671    pdraw->have_back = 0;
 672
 673    /* This assumes the DRI2 buffer attachment tokens matches the
 674     * __DRIbuffer tokens. */
 675    for (i = 0; i < count; i++) {
 676       pdraw->buffers[i].attachment = buffers[i].attachment;
 677       pdraw->buffers[i].name = buffers[i].name;
 678       pdraw->buffers[i].pitch = buffers[i].pitch;
 679       pdraw->buffers[i].cpp = buffers[i].cpp;
 680       pdraw->buffers[i].flags = buffers[i].flags;
 681       if (pdraw->buffers[i].attachment == __DRI_BUFFER_FAKE_FRONT_LEFT)
 682          pdraw->have_fake_front = 1;
 683       if (pdraw->buffers[i].attachment == __DRI_BUFFER_BACK_LEFT)
 684          pdraw->have_back = 1;
 685    }
 686
 687 }
 688
 689 unsigned dri2GetSwapEventType(Display* dpy, XID drawable)
 690 {
 691       struct glx_display *glx_dpy = __glXInitialize(dpy);
 692       __GLXDRIdrawable *pdraw;
 693       pdraw = dri2GetGlxDrawableFromXDrawableId(dpy, drawable);
 694       if (!pdraw || !(pdraw->eventMask & GLX_BUFFER_SWAP_COMPLETE_INTEL_MASK))
 695          return 0;
 696       return glx_dpy->codes->first_event + GLX_BufferSwapComplete;
 697 }
 698
 699 static void show_fps(struct dri2_drawable *draw)
 700 {
 701    struct timeval tv;
 702    uint64_t current_time;
 703
 704    gettimeofday(&tv, 0);
 705    current_time = (uint64_t)tv.tv_sec*1000000 + (uint64_t)tv.tv_usec;
 706
 707    draw->frames++;
 708
 709    if (draw->previous_time + 1000000 <= current_time) {
 710       if (draw->previous_time) {
 711          fprintf(stderr, "libGL: FPS = %.1f\n",
 712                  ((uint64_t)draw->frames * 1000000) /
 713                  (double)(current_time - draw->previous_time));
 714       }
 715       draw->frames = 0;
 716       draw->previous_time = current_time;
 717    }
 718 }
 719
 720 static int64_t
 721 dri2SwapBuffers(__GLXDRIdrawable *pdraw, int64_t target_msc, int64_t divisor,
 722                 int64_t remainder)
 723 {
 724     struct dri2_drawable *priv = (struct dri2_drawable *) pdraw;
 725     struct glx_display *dpyPriv = __glXInitialize(priv->base.psc->dpy);
 726     struct dri2_screen *psc = (struct dri2_screen *) priv->base.psc;
 727     struct dri2_display *pdp =
 728         (struct dri2_display *)dpyPriv->dri2Display;
 729     CARD64 ret = 0;
 730
 731     /* Check we have the right attachments */
 732     if (!priv->have_back)
 733         return ret;
 734
 735     /* Old servers can't handle swapbuffers */
 736     if (!pdp->swapAvailable) {
 737        __dri2CopySubBuffer(pdraw, 0, 0, priv->width, priv->height,
 738                            __DRI2_THROTTLE_SWAPBUFFER);
 739     } else {
 740 #ifdef X_DRI2SwapBuffers
 741     if (psc->f) {
 742        struct glx_context *gc = __glXGetCurrentContext();
 743
 744        if (gc) {
 745           (*psc->f->flush)(priv->driDrawable);
 746        }
 747     }
 748
 749        dri2Throttle(psc, priv, __DRI2_THROTTLE_SWAPBUFFER);
 750
 751        DRI2SwapBuffers(psc->base.dpy, pdraw->xDrawable,
 752                        target_msc, divisor, remainder, &ret);
 753 #endif
 754     }
 755
 756     if (psc->show_fps) {
 757        show_fps(priv);
 758     }
 759
 760     /* Old servers don't send invalidate events */
 761     if (!pdp->invalidateAvailable)
 762        dri2InvalidateBuffers(dpyPriv->dpy, pdraw->xDrawable);
 763
 764     return ret;
 765 }
 766
 767 static __DRIbuffer *
 768 dri2GetBuffers(__DRIdrawable * driDrawable,
 769                int *width, int *height,
 770                unsigned int *attachments, int count,
 771                int *out_count, void *loaderPrivate)
 772 {
 773    struct dri2_drawable *pdraw = loaderPrivate;
 774    DRI2Buffer *buffers;
 775
 776    buffers = DRI2GetBuffers(pdraw->base.psc->dpy, pdraw->base.xDrawable,
 777                             width, height, attachments, count, out_count);
 778    if (buffers == NULL)
 779       return NULL;
 780
 781    pdraw->width = *width;
 782    pdraw->height = *height;
 783    process_buffers(pdraw, buffers, *out_count);
 784
 785    free(buffers);
 786
 787    return pdraw->buffers;
 788 }
 789
 790 static __DRIbuffer *
 791 dri2GetBuffersWithFormat(__DRIdrawable * driDrawable,
 792                          int *width, int *height,
 793                          unsigned int *attachments, int count,
 794                          int *out_count, void *loaderPrivate)
 795 {
 796    struct dri2_drawable *pdraw = loaderPrivate;
 797    DRI2Buffer *buffers;
 798
 799    buffers = DRI2GetBuffersWithFormat(pdraw->base.psc->dpy,
 800                                       pdraw->base.xDrawable,
 801                                       width, height, attachments,
 802                                       count, out_count);
 803    if (buffers == NULL)
 804       return NULL;
 805
 806    pdraw->width = *width;
 807    pdraw->height = *height;
 808    process_buffers(pdraw, buffers, *out_count);
 809
 810    free(buffers);
 811
 812    return pdraw->buffers;
 813 }
 814
 815 static int
 816 dri2SetSwapInterval(__GLXDRIdrawable *pdraw, int interval)
 817 {
 818    xcb_connection_t *c = XGetXCBConnection(pdraw->psc->dpy);
 819    struct dri2_drawable *priv =  (struct dri2_drawable *) pdraw;
 820    GLint vblank_mode = DRI_CONF_VBLANK_DEF_INTERVAL_1;
 821    struct dri2_screen *psc = (struct dri2_screen *) priv->base.psc;
 822
 823    if (psc->config)
 824       psc->config->configQueryi(psc->driScreen,
 825                                 "vblank_mode", &vblank_mode);
 826
 827    switch (vblank_mode) {
 828    case DRI_CONF_VBLANK_NEVER:
 829       if (interval != 0)
 830          return GLX_BAD_VALUE;
 831       break;
 832    case DRI_CONF_VBLANK_ALWAYS_SYNC:
 833       if (interval <= 0)
 834          return GLX_BAD_VALUE;
 835       break;
 836    default:
 837       break;
 838    }
 839
 840    xcb_dri2_swap_interval(c, priv->base.xDrawable, interval);
 841    priv->swap_interval = interval;
 842
 843    return 0;
 844 }
 845
 846 static int
 847 dri2GetSwapInterval(__GLXDRIdrawable *pdraw)
 848 {
 849    struct dri2_drawable *priv =  (struct dri2_drawable *) pdraw;
 850
 851   return priv->swap_interval;
 852 }
 853
 854 static const __DRIdri2LoaderExtension dri2LoaderExtension = {
 855    {__DRI_DRI2_LOADER, __DRI_DRI2_LOADER_VERSION},
 856    dri2GetBuffers,
 857    dri2FlushFrontBuffer,
 858    dri2GetBuffersWithFormat,
 859 };
 860
 861 static const __DRIdri2LoaderExtension dri2LoaderExtension_old = {
 862    {__DRI_DRI2_LOADER, __DRI_DRI2_LOADER_VERSION},
 863    dri2GetBuffers,
 864    dri2FlushFrontBuffer,
 865    NULL,
 866 };
 867
 868 static const __DRIuseInvalidateExtension dri2UseInvalidate = {
 869    { __DRI_USE_INVALIDATE, __DRI_USE_INVALIDATE_VERSION }
 870 };
 871
 872 _X_HIDDEN void
 873 dri2InvalidateBuffers(Display *dpy, XID drawable)
 874 {
 875    __GLXDRIdrawable *pdraw =
 876       dri2GetGlxDrawableFromXDrawableId(dpy, drawable);
 877    struct dri2_screen *psc;
 878    struct dri2_drawable *pdp = (struct dri2_drawable *) pdraw;
 879
 880    if (!pdraw)
 881       return;
 882
 883    psc = (struct dri2_screen *) pdraw->psc;
 884
 885    if (pdraw && psc->f && psc->f->base.version >= 3 && psc->f->invalidate)
 886        psc->f->invalidate(pdp->driDrawable);
 887 }
 888
 889 static void
 890 dri2_bind_tex_image(Display * dpy,
 891                     GLXDrawable drawable,
 892                     int buffer, const int *attrib_list)
 893 {
 894    struct glx_context *gc = __glXGetCurrentContext();
 895    struct dri2_context *pcp = (struct dri2_context *) gc;
 896    __GLXDRIdrawable *base = GetGLXDRIDrawable(dpy, drawable);
 897    struct glx_display *dpyPriv = __glXInitialize(dpy);
 898    struct dri2_drawable *pdraw = (struct dri2_drawable *) base;
 899    struct dri2_display *pdp =
 900       (struct dri2_display *) dpyPriv->dri2Display;
 901    struct dri2_screen *psc;
 902
 903    if (pdraw != NULL) {
 904       psc = (struct dri2_screen *) base->psc;
 905
 906       if (!pdp->invalidateAvailable && psc->f &&
 907            psc->f->base.version >= 3 && psc->f->invalidate)
 908          psc->f->invalidate(pdraw->driDrawable);
 909
 910       if (psc->texBuffer->base.version >= 2 &&
 911           psc->texBuffer->setTexBuffer2 != NULL) {
 912          (*psc->texBuffer->setTexBuffer2) (pcp->driContext,
 913                                            pdraw->base.textureTarget,
 914                                            pdraw->base.textureFormat,
 915                                            pdraw->driDrawable);
 916       }
 917       else {
 918          (*psc->texBuffer->setTexBuffer) (pcp->driContext,
 919                                           pdraw->base.textureTarget,
 920                                           pdraw->driDrawable);
 921       }
 922    }
 923 }
 924
 925 static void
 926 dri2_release_tex_image(Display * dpy, GLXDrawable drawable, int buffer)
 927 {
 928 #if __DRI_TEX_BUFFER_VERSION >= 3
 929    struct glx_context *gc = __glXGetCurrentContext();
 930    struct dri2_context *pcp = (struct dri2_context *) gc;
 931    __GLXDRIdrawable *base = GetGLXDRIDrawable(dpy, drawable);
 932    struct glx_display *dpyPriv = __glXInitialize(dpy);
 933    struct dri2_drawable *pdraw = (struct dri2_drawable *) base;
 934    struct dri2_display *pdp =
 935       (struct dri2_display *) dpyPriv->dri2Display;
 936    struct dri2_screen *psc;
 937
 938    if (pdraw != NULL) {
 939       psc = (struct dri2_screen *) base->psc;
 940
 941       if (psc->texBuffer->base.version >= 3 &&
 942           psc->texBuffer->releaseTexBuffer != NULL) {
 943          (*psc->texBuffer->releaseTexBuffer) (pcp->driContext,
 944                                            pdraw->base.textureTarget,
 945                                            pdraw->driDrawable);
 946       }
 947    }
 948 #endif
 949 }
 950
 951 static const struct glx_context_vtable dri2_context_vtable = {
 952    dri2_destroy_context,
 953    dri2_bind_context,
 954    dri2_unbind_context,
 955    dri2_wait_gl,
 956    dri2_wait_x,
 957    DRI_glXUseXFont,
 958    dri2_bind_tex_image,
 959    dri2_release_tex_image,
 960    NULL, /* get_proc_address */
 961 };
 962
 963 static void
 964 dri2BindExtensions(struct dri2_screen *psc, const __DRIextension **extensions)
 965 {
 966    int i;
 967
 968    __glXEnableDirectExtension(&psc->base, "GLX_SGI_video_sync");
 969    __glXEnableDirectExtension(&psc->base, "GLX_SGI_swap_control");
 970    __glXEnableDirectExtension(&psc->base, "GLX_MESA_swap_control");
 971    __glXEnableDirectExtension(&psc->base, "GLX_SGI_make_current_read");
 972
 973    /* FIXME: if DRI2 version supports it... */
 974    __glXEnableDirectExtension(&psc->base, "INTEL_swap_event");
 975
 976    if (psc->dri2->base.version >= 3) {
 977       const unsigned mask = psc->dri2->getAPIMask(psc->driScreen);
 978
 979       __glXEnableDirectExtension(&psc->base, "GLX_ARB_create_context");
 980       __glXEnableDirectExtension(&psc->base, "GLX_ARB_create_context_profile");
 981
 982       if ((mask & (1 << __DRI_API_GLES2)) != 0)
 983          __glXEnableDirectExtension(&psc->base,
 984                                     "GLX_EXT_create_context_es2_profile");
 985    }
 986
 987    for (i = 0; extensions[i]; i++) {
 988       if ((strcmp(extensions[i]->name, __DRI_TEX_BUFFER) == 0)) {
 989          psc->texBuffer = (__DRItexBufferExtension *) extensions[i];
 990          __glXEnableDirectExtension(&psc->base, "GLX_EXT_texture_from_pixmap");
 991       }
 992
 993       if ((strcmp(extensions[i]->name, __DRI2_FLUSH) == 0)) {
 994          psc->f = (__DRI2flushExtension *) extensions[i];
 995          /* internal driver extension, no GL extension exposed */
 996       }
 997
 998       if ((strcmp(extensions[i]->name, __DRI2_CONFIG_QUERY) == 0))
 999          psc->config = (__DRI2configQueryExtension *) extensions[i];
1000
1001       if (((strcmp(extensions[i]->name, __DRI2_THROTTLE) == 0)))
1002          psc->throttle = (__DRI2throttleExtension *) extensions[i];
1003
1004       /* DRI2 version 3 is also required because
1005        * GLX_ARB_create_context_robustness requires GLX_ARB_create_context.
1006        */
1007       if (psc->dri2->base.version >= 3
1008           && strcmp(extensions[i]->name, __DRI2_ROBUSTNESS) == 0)
1009          __glXEnableDirectExtension(&psc->base,
1010                                     "GLX_ARB_create_context_robustness");
1011    }
1012 }
1013
1014 static const struct glx_screen_vtable dri2_screen_vtable = {
1015    dri2_create_context,
1016    dri2_create_context_attribs
1017 };
1018
1019 static struct glx_screen *
1020 dri2CreateScreen(int screen, struct glx_display * priv)
1021 {
1022    const __DRIconfig **driver_configs;
1023    const __DRIextension **extensions;
1024    const struct dri2_display *const pdp = (struct dri2_display *)
1025       priv->dri2Display;
1026    struct dri2_screen *psc;
1027    __GLXDRIscreen *psp;
1028    struct glx_config *configs = NULL, *visuals = NULL;
1029    char *driverName, *deviceName, *tmp;
1030    drm_magic_t magic;
1031    int i;
1032
1033    psc = calloc(1, sizeof *psc);
1034    if (psc == NULL)
1035       return NULL;
1036
1037    psc->fd = -1;
1038
1039    if (!glx_screen_init(&psc->base, screen, priv)) {
1040       free(psc);
1041       return NULL;
1042    }
1043
1044    if (!DRI2Connect(priv->dpy, RootWindow(priv->dpy, screen),
1045                     &driverName, &deviceName)) {
1046       glx_screen_cleanup(&psc->base);
1047       free(psc);
1048       InfoMessageF("screen %d does not appear to be DRI2 capable\n", screen);
1049       return NULL;
1050    }
1051
1052    psc->driver = driOpenDriver(driverName);
1053    if (psc->driver == NULL) {
1054       ErrorMessageF("driver pointer missing\n");
1055       goto handle_error;
1056    }
1057
1058    extensions = dlsym(psc->driver, __DRI_DRIVER_EXTENSIONS);
1059    if (extensions == NULL) {
1060       ErrorMessageF("driver exports no extensions (%s)\n", dlerror());
1061       goto handle_error;
1062    }
1063
1064    for (i = 0; extensions[i]; i++) {
1065       if (strcmp(extensions[i]->name, __DRI_CORE) == 0)
1066          psc->core = (__DRIcoreExtension *) extensions[i];
1067       if (strcmp(extensions[i]->name, __DRI_DRI2) == 0)
1068          psc->dri2 = (__DRIdri2Extension *) extensions[i];
1069    }
1070
1071    if (psc->core == NULL || psc->dri2 == NULL) {
1072       ErrorMessageF("core dri or dri2 extension not found\n");
1073       goto handle_error;
1074    }
1075
1076 #ifdef O_CLOEXEC
1077    psc->fd = open(deviceName, O_RDWR | O_CLOEXEC);
1078    if (psc->fd == -1 && errno == EINVAL)
1079 #endif
1080    {
1081       psc->fd = open(deviceName, O_RDWR);
1082       if (psc->fd != -1)
1083          fcntl(psc->fd, F_SETFD, fcntl(psc->fd, F_GETFD) | FD_CLOEXEC);
1084    }
1085    if (psc->fd < 0) {
1086       ErrorMessageF("failed to open drm device: %s\n", strerror(errno));
1087       goto handle_error;
1088    }
1089
1090    if (drmGetMagic(psc->fd, &magic)) {
1091       ErrorMessageF("failed to get magic\n");
1092       goto handle_error;
1093    }
1094
1095    if (!DRI2Authenticate(priv->dpy, RootWindow(priv->dpy, screen), magic)) {
1096       ErrorMessageF("failed to authenticate magic %d\n", magic);
1097       goto handle_error;
1098    }
1099
1100
1101    /* If the server does not support the protocol for
1102     * DRI2GetBuffersWithFormat, don't supply that interface to the driver.
1103     */
1104    psc->driScreen =
1105       psc->dri2->createNewScreen(screen, psc->fd,
1106                                  (const __DRIextension **)
1107                                  &pdp->loader_extensions[0],
1108                                  &driver_configs, psc);
1109
1110    if (psc->driScreen == NULL) {
1111       ErrorMessageF("failed to create dri screen\n");
1112       goto handle_error;
1113    }
1114
1115    extensions = psc->core->getExtensions(psc->driScreen);
1116    dri2BindExtensions(psc, extensions);
1117
1118    configs = driConvertConfigs(psc->core, psc->base.configs, driver_configs);
1119    visuals = driConvertConfigs(psc->core, psc->base.visuals, driver_configs);
1120
1121    if (!configs || !visuals)
1122        goto handle_error;
1123
1124    glx_config_destroy_list(psc->base.configs);
1125    psc->base.configs = configs;
1126    glx_config_destroy_list(psc->base.visuals);
1127    psc->base.visuals = visuals;
1128
1129    psc->driver_configs = driver_configs;
1130
1131    psc->base.vtable = &dri2_screen_vtable;
1132    psp = &psc->vtable;
1133    psc->base.driScreen = psp;
1134    psp->destroyScreen = dri2DestroyScreen;
1135    psp->createDrawable = dri2CreateDrawable;
1136    psp->swapBuffers = dri2SwapBuffers;
1137    psp->getDrawableMSC = NULL;
1138    psp->waitForMSC = NULL;
1139    psp->waitForSBC = NULL;
1140    psp->setSwapInterval = NULL;
1141    psp->getSwapInterval = NULL;
1142
1143    if (pdp->driMinor >= 2) {
1144       psp->getDrawableMSC = dri2DrawableGetMSC;
1145       psp->waitForMSC = dri2WaitForMSC;
1146       psp->waitForSBC = dri2WaitForSBC;
1147       psp->setSwapInterval = dri2SetSwapInterval;
1148       psp->getSwapInterval = dri2GetSwapInterval;
1149       __glXEnableDirectExtension(&psc->base, "GLX_OML_sync_control");
1150    }
1151
1152    /* DRI2 suports SubBuffer through DRI2CopyRegion, so it's always
1153     * available.*/
1154    psp->copySubBuffer = dri2CopySubBuffer;
1155    __glXEnableDirectExtension(&psc->base, "GLX_MESA_copy_sub_buffer");
1156
1157    free(driverName);
1158    free(deviceName);
1159
1160    tmp = getenv("LIBGL_SHOW_FPS");
1161    psc->show_fps = tmp && strcmp(tmp, "1") == 0;
1162
1163    return &psc->base;
1164
1165 handle_error:
1166    CriticalErrorMessageF("failed to load driver: %s\n", driverName);
1167
1168    if (configs)
1169        glx_config_destroy_list(configs);
1170    if (visuals)
1171        glx_config_destroy_list(visuals);
1172    if (psc->driScreen)
1173        psc->core->destroyScreen(psc->driScreen);
1174    psc->driScreen = NULL;
1175    if (psc->fd >= 0)
1176       close(psc->fd);
1177    if (psc->driver)
1178       dlclose(psc->driver);
1179
1180    free(driverName);
1181    free(deviceName);
1182    glx_screen_cleanup(&psc->base);
1183    free(psc);
1184
1185    return NULL;
1186 }
1187
1188 /* Called from __glXFreeDisplayPrivate.
1189  */
1190 static void
1191 dri2DestroyDisplay(__GLXDRIdisplay * dpy)
1192 {
1193    struct dri2_display *pdp = (struct dri2_display *) dpy;
1194
1195    __glxHashDestroy(pdp->dri2Hash);
1196    free(dpy);
1197 }
1198
1199 _X_HIDDEN __GLXDRIdrawable *
1200 dri2GetGlxDrawableFromXDrawableId(Display *dpy, XID id)
1201 {
1202    struct glx_display *d = __glXInitialize(dpy);
1203    struct dri2_display *pdp = (struct dri2_display *) d->dri2Display;
1204    __GLXDRIdrawable *pdraw;
1205
1206    if (__glxHashLookup(pdp->dri2Hash, id, (void *) &pdraw) == 0)
1207       return pdraw;
1208
1209    return NULL;
1210 }
1211
1212 /*
1213  * Allocate, initialize and return a __DRIdisplayPrivate object.
1214  * This is called from __glXInitialize() when we are given a new
1215  * display pointer.
1216  */
1217 _X_HIDDEN __GLXDRIdisplay *
1218 dri2CreateDisplay(Display * dpy)
1219 {
1220    struct dri2_display *pdp;
1221    int eventBase, errorBase, i;
1222
1223    if (!DRI2QueryExtension(dpy, &eventBase, &errorBase))
1224       return NULL;
1225
1226    pdp = malloc(sizeof *pdp);
1227    if (pdp == NULL)
1228       return NULL;
1229
1230    if (!DRI2QueryVersion(dpy, &pdp->driMajor, &pdp->driMinor)) {
1231       free(pdp);
1232       return NULL;
1233    }
1234
1235    pdp->driPatch = 0;
1236    pdp->swapAvailable = (pdp->driMinor >= 2);
1237    pdp->invalidateAvailable = (pdp->driMinor >= 3);
1238
1239    pdp->base.destroyDisplay = dri2DestroyDisplay;
1240    pdp->base.createScreen = dri2CreateScreen;
1241
1242    i = 0;
1243    if (pdp->driMinor < 1)
1244       pdp->loader_extensions[i++] = &dri2LoaderExtension_old.base;
1245    else
1246       pdp->loader_extensions[i++] = &dri2LoaderExtension.base;
1247
1248    pdp->loader_extensions[i++] = &systemTimeExtension.base;
1249
1250    pdp->loader_extensions[i++] = &dri2UseInvalidate.base;
1251
1252    pdp->loader_extensions[i++] = NULL;
1253
1254    pdp->dri2Hash = __glxHashCreate();
1255    if (pdp->dri2Hash == NULL) {
1256       free(pdp);
1257       return NULL;
1258    }
1259
1260    return &pdp->base;
1261 }
1262
1263 #endif /* GLX_DIRECT_RENDERING */