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
 443    if (!get_msc_reply)
 444       return 0;
 445
 446    *ust = merge_counter(get_msc_reply->ust_hi, get_msc_reply->ust_lo);
 447    *msc = merge_counter(get_msc_reply->msc_hi, get_msc_reply->msc_lo);
 448    *sbc = merge_counter(get_msc_reply->sbc_hi, get_msc_reply->sbc_lo);
 449    free(get_msc_reply);
 450
 451    return 1;
 452 }
 453
 454 static int
 455 dri2WaitForMSC(__GLXDRIdrawable *pdraw, int64_t target_msc, int64_t divisor,
 456                int64_t remainder, int64_t *ust, int64_t *msc, int64_t *sbc)
 457 {
 458    xcb_connection_t *c = XGetXCBConnection(pdraw->psc->dpy);
 459    xcb_dri2_wait_msc_cookie_t wait_msc_cookie;
 460    xcb_dri2_wait_msc_reply_t *wait_msc_reply;
 461    uint32_t target_msc_hi, target_msc_lo;
 462    uint32_t divisor_hi, divisor_lo;
 463    uint32_t remainder_hi, remainder_lo;
 464
 465    split_counter(target_msc, &target_msc_hi, &target_msc_lo);
 466    split_counter(divisor, &divisor_hi, &divisor_lo);
 467    split_counter(remainder, &remainder_hi, &remainder_lo);
 468
 469    wait_msc_cookie = xcb_dri2_wait_msc_unchecked(c, pdraw->xDrawable,
 470                                                  target_msc_hi, target_msc_lo,
 471                                                  divisor_hi, divisor_lo,
 472                                                  remainder_hi, remainder_lo);
 473    wait_msc_reply = xcb_dri2_wait_msc_reply(c, wait_msc_cookie, NULL);
 474
 475    if (!wait_msc_reply)
 476       return 0;
 477
 478    *ust = merge_counter(wait_msc_reply->ust_hi, wait_msc_reply->ust_lo);
 479    *msc = merge_counter(wait_msc_reply->msc_hi, wait_msc_reply->msc_lo);
 480    *sbc = merge_counter(wait_msc_reply->sbc_hi, wait_msc_reply->sbc_lo);
 481    free(wait_msc_reply);
 482
 483    return 1;
 484 }
 485
 486 static int
 487 dri2WaitForSBC(__GLXDRIdrawable *pdraw, int64_t target_sbc, int64_t *ust,
 488                int64_t *msc, int64_t *sbc)
 489 {
 490    xcb_connection_t *c = XGetXCBConnection(pdraw->psc->dpy);
 491    xcb_dri2_wait_sbc_cookie_t wait_sbc_cookie;
 492    xcb_dri2_wait_sbc_reply_t *wait_sbc_reply;
 493    uint32_t target_sbc_hi, target_sbc_lo;
 494
 495    split_counter(target_sbc, &target_sbc_hi, &target_sbc_lo);
 496
 497    wait_sbc_cookie = xcb_dri2_wait_sbc_unchecked(c, pdraw->xDrawable,
 498                                                  target_sbc_hi, target_sbc_lo);
 499    wait_sbc_reply = xcb_dri2_wait_sbc_reply(c, wait_sbc_cookie, NULL);
 500
 501    if (!wait_sbc_reply)
 502       return 0;
 503
 504    *ust = merge_counter(wait_sbc_reply->ust_hi, wait_sbc_reply->ust_lo);
 505    *msc = merge_counter(wait_sbc_reply->msc_hi, wait_sbc_reply->msc_lo);
 506    *sbc = merge_counter(wait_sbc_reply->sbc_hi, wait_sbc_reply->sbc_lo);
 507    free(wait_sbc_reply);
 508
 509    return 1;
 510 }
 511
 512 /**
 513  * dri2Throttle - Request driver throttling
 514  *
 515  * This function uses the DRI2 throttle extension to give the
 516  * driver the opportunity to throttle on flush front, copysubbuffer
 517  * and swapbuffers.
 518  */
 519 static void
 520 dri2Throttle(struct dri2_screen *psc,
 521              struct dri2_drawable *draw,
 522              enum __DRI2throttleReason reason)
 523 {
 524    if (psc->throttle) {
 525       struct glx_context *gc = __glXGetCurrentContext();
 526       struct dri2_context *dri2Ctx = (struct dri2_context *)gc;
 527       __DRIcontext *ctx =
 528          (dri2Ctx) ? dri2Ctx->driContext : NULL;
 529
 530       psc->throttle->throttle(ctx, draw->driDrawable, reason);
 531    }
 532 }
 533
 534 static void
 535 __dri2CopySubBuffer(__GLXDRIdrawable *pdraw, int x, int y,
 536                     int width, int height,
 537                     enum __DRI2throttleReason reason)
 538 {
 539    struct dri2_drawable *priv = (struct dri2_drawable *) pdraw;
 540    struct dri2_screen *psc = (struct dri2_screen *) pdraw->psc;
 541    XRectangle xrect;
 542    XserverRegion region;
 543
 544    /* Check we have the right attachments */
 545    if (!priv->have_back)
 546       return;
 547
 548    xrect.x = x;
 549    xrect.y = priv->height - y - height;
 550    xrect.width = width;
 551    xrect.height = height;
 552
 553    if (psc->f)
 554       (*psc->f->flush) (priv->driDrawable);
 555
 556    dri2Throttle(psc, priv, reason);
 557
 558    region = XFixesCreateRegion(psc->base.dpy, &xrect, 1);
 559    DRI2CopyRegion(psc->base.dpy, pdraw->xDrawable, region,
 560                   DRI2BufferFrontLeft, DRI2BufferBackLeft);
 561
 562    /* Refresh the fake front (if present) after we just damaged the real
 563     * front.
 564     */
 565    if (priv->have_fake_front)
 566       DRI2CopyRegion(psc->base.dpy, pdraw->xDrawable, region,
 567                      DRI2BufferFakeFrontLeft, DRI2BufferFrontLeft);
 568
 569    XFixesDestroyRegion(psc->base.dpy, region);
 570 }
 571
 572 static void
 573 dri2CopySubBuffer(__GLXDRIdrawable *pdraw, int x, int y,
 574                   int width, int height)
 575 {
 576    __dri2CopySubBuffer(pdraw, x, y, width, height,
 577                        __DRI2_THROTTLE_COPYSUBBUFFER);
 578 }
 579
 580
 581 static void
 582 dri2_copy_drawable(struct dri2_drawable *priv, int dest, int src)
 583 {
 584    XRectangle xrect;
 585    XserverRegion region;
 586    struct dri2_screen *psc = (struct dri2_screen *) priv->base.psc;
 587
 588    xrect.x = 0;
 589    xrect.y = 0;
 590    xrect.width = priv->width;
 591    xrect.height = priv->height;
 592
 593    if (psc->f)
 594       (*psc->f->flush) (priv->driDrawable);
 595
 596    region = XFixesCreateRegion(psc->base.dpy, &xrect, 1);
 597    DRI2CopyRegion(psc->base.dpy, priv->base.xDrawable, region, dest, src);
 598    XFixesDestroyRegion(psc->base.dpy, region);
 599
 600 }
 601
 602 static void
 603 dri2_wait_x(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, DRI2BufferFakeFrontLeft, DRI2BufferFrontLeft);
 612 }
 613
 614 static void
 615 dri2_wait_gl(struct glx_context *gc)
 616 {
 617    struct dri2_drawable *priv = (struct dri2_drawable *)
 618       GetGLXDRIDrawable(gc->currentDpy, gc->currentDrawable);
 619
 620    if (priv == NULL || !priv->have_fake_front)
 621       return;
 622
 623    dri2_copy_drawable(priv, DRI2BufferFrontLeft, DRI2BufferFakeFrontLeft);
 624 }
 625
 626 static void
 627 dri2FlushFrontBuffer(__DRIdrawable *driDrawable, void *loaderPrivate)
 628 {
 629    struct glx_display *priv;
 630    struct dri2_display *pdp;
 631    struct glx_context *gc;
 632    struct dri2_drawable *pdraw = loaderPrivate;
 633    struct dri2_screen *psc;
 634
 635    if (!pdraw)
 636       return;
 637
 638    if (!pdraw->base.psc)
 639       return;
 640
 641    psc = (struct dri2_screen *) pdraw->base.psc;
 642
 643    priv = __glXInitialize(psc->base.dpy);
 644    pdp = (struct dri2_display *) priv->dri2Display;
 645    gc = __glXGetCurrentContext();
 646
 647    dri2Throttle(psc, pdraw, __DRI2_THROTTLE_FLUSHFRONT);
 648
 649    /* Old servers don't send invalidate events */
 650    if (!pdp->invalidateAvailable)
 651        dri2InvalidateBuffers(priv->dpy, pdraw->base.xDrawable);
 652
 653    dri2_wait_gl(gc);
 654 }
 655
 656
 657 static void
 658 dri2DestroyScreen(struct glx_screen *base)
 659 {
 660    struct dri2_screen *psc = (struct dri2_screen *) base;
 661
 662    /* Free the direct rendering per screen data */
 663    (*psc->core->destroyScreen) (psc->driScreen);
 664    driDestroyConfigs(psc->driver_configs);
 665    close(psc->fd);
 666    free(psc);
 667 }
 668
 669 /**
 670  * Process list of buffer received from the server
 671  *
 672  * Processes the list of buffers received in a reply from the server to either
 673  * \c DRI2GetBuffers or \c DRI2GetBuffersWithFormat.
 674  */
 675 static void
 676 process_buffers(struct dri2_drawable * pdraw, DRI2Buffer * buffers,
 677                 unsigned count)
 678 {
 679    int i;
 680
 681    pdraw->bufferCount = count;
 682    pdraw->have_fake_front = 0;
 683    pdraw->have_back = 0;
 684
 685    /* This assumes the DRI2 buffer attachment tokens matches the
 686     * __DRIbuffer tokens. */
 687    for (i = 0; i < count; i++) {
 688       pdraw->buffers[i].attachment = buffers[i].attachment;
 689       pdraw->buffers[i].name = buffers[i].name;
 690       pdraw->buffers[i].pitch = buffers[i].pitch;
 691       pdraw->buffers[i].cpp = buffers[i].cpp;
 692       pdraw->buffers[i].flags = buffers[i].flags;
 693       if (pdraw->buffers[i].attachment == __DRI_BUFFER_FAKE_FRONT_LEFT)
 694          pdraw->have_fake_front = 1;
 695       if (pdraw->buffers[i].attachment == __DRI_BUFFER_BACK_LEFT)
 696          pdraw->have_back = 1;
 697    }
 698
 699 }
 700
 701 unsigned dri2GetSwapEventType(Display* dpy, XID drawable)
 702 {
 703       struct glx_display *glx_dpy = __glXInitialize(dpy);
 704       __GLXDRIdrawable *pdraw;
 705       pdraw = dri2GetGlxDrawableFromXDrawableId(dpy, drawable);
 706       if (!pdraw || !(pdraw->eventMask & GLX_BUFFER_SWAP_COMPLETE_INTEL_MASK))
 707          return 0;
 708       return glx_dpy->codes->first_event + GLX_BufferSwapComplete;
 709 }
 710
 711 static void show_fps(struct dri2_drawable *draw)
 712 {
 713    struct timeval tv;
 714    uint64_t current_time;
 715
 716    gettimeofday(&tv, 0);
 717    current_time = (uint64_t)tv.tv_sec*1000000 + (uint64_t)tv.tv_usec;
 718
 719    draw->frames++;
 720
 721    if (draw->previous_time + 1000000 <= current_time) {
 722       if (draw->previous_time) {
 723          fprintf(stderr, "libGL: FPS = %.1f\n",
 724                  ((uint64_t)draw->frames * 1000000) /
 725                  (double)(current_time - draw->previous_time));
 726       }
 727       draw->frames = 0;
 728       draw->previous_time = current_time;
 729    }
 730 }
 731
 732 static int64_t
 733 dri2SwapBuffers(__GLXDRIdrawable *pdraw, int64_t target_msc, int64_t divisor,
 734                 int64_t remainder)
 735 {
 736     struct dri2_drawable *priv = (struct dri2_drawable *) pdraw;
 737     struct glx_display *dpyPriv = __glXInitialize(priv->base.psc->dpy);
 738     struct dri2_screen *psc = (struct dri2_screen *) priv->base.psc;
 739     struct dri2_display *pdp =
 740         (struct dri2_display *)dpyPriv->dri2Display;
 741     CARD64 ret = 0;
 742
 743     /* Check we have the right attachments */
 744     if (!priv->have_back)
 745         return ret;
 746
 747     /* Old servers can't handle swapbuffers */
 748     if (!pdp->swapAvailable) {
 749        __dri2CopySubBuffer(pdraw, 0, 0, priv->width, priv->height,
 750                            __DRI2_THROTTLE_SWAPBUFFER);
 751     } else {
 752        xcb_connection_t *c = XGetXCBConnection(pdraw->psc->dpy);
 753        xcb_dri2_swap_buffers_cookie_t swap_buffers_cookie;
 754        xcb_dri2_swap_buffers_reply_t *swap_buffers_reply;
 755        uint32_t target_msc_hi, target_msc_lo;
 756        uint32_t divisor_hi, divisor_lo;
 757        uint32_t remainder_hi, remainder_lo;
 758
 759        if (psc->f) {
 760           struct glx_context *gc = __glXGetCurrentContext();
 761
 762           if (gc) {
 763              (*psc->f->flush)(priv->driDrawable);
 764           }
 765        }
 766
 767        dri2Throttle(psc, priv, __DRI2_THROTTLE_SWAPBUFFER);
 768
 769        split_counter(target_msc, &target_msc_hi, &target_msc_lo);
 770        split_counter(divisor, &divisor_hi, &divisor_lo);
 771        split_counter(remainder, &remainder_hi, &remainder_lo);
 772
 773        swap_buffers_cookie =
 774           xcb_dri2_swap_buffers_unchecked(c, pdraw->xDrawable,
 775                                           target_msc_hi, target_msc_lo,
 776                                           divisor_hi, divisor_lo,
 777                                           remainder_hi, remainder_lo);
 778        /* Immediately wait on the swapbuffers reply.  If we didn't, we'd have
 779         * to do so some time before reusing a (non-pageflipped) backbuffer.
 780         * Otherwise, the new rendering could get ahead of the X Server's
 781         * dispatch of the swapbuffer and you'd display garbage.
 782         *
 783         * We use XSync() first to reap the invalidate events through the event
 784         * filter, to ensure that the next drawing doesn't use an invalidated
 785         * buffer.
 786         */
 787        XSync(pdraw->psc->dpy, False);
 788        swap_buffers_reply =
 789           xcb_dri2_swap_buffers_reply(c, swap_buffers_cookie, NULL);
 790        ret = merge_counter(swap_buffers_reply->swap_hi,
 791                            swap_buffers_reply->swap_lo);
 792        free(swap_buffers_reply);
 793     }
 794
 795     if (psc->show_fps) {
 796        show_fps(priv);
 797     }
 798
 799     /* Old servers don't send invalidate events */
 800     if (!pdp->invalidateAvailable)
 801        dri2InvalidateBuffers(dpyPriv->dpy, pdraw->xDrawable);
 802
 803     return ret;
 804 }
 805
 806 static __DRIbuffer *
 807 dri2GetBuffers(__DRIdrawable * driDrawable,
 808                int *width, int *height,
 809                unsigned int *attachments, int count,
 810                int *out_count, void *loaderPrivate)
 811 {
 812    struct dri2_drawable *pdraw = loaderPrivate;
 813    DRI2Buffer *buffers;
 814
 815    buffers = DRI2GetBuffers(pdraw->base.psc->dpy, pdraw->base.xDrawable,
 816                             width, height, attachments, count, out_count);
 817    if (buffers == NULL)
 818       return NULL;
 819
 820    pdraw->width = *width;
 821    pdraw->height = *height;
 822    process_buffers(pdraw, buffers, *out_count);
 823
 824    free(buffers);
 825
 826    return pdraw->buffers;
 827 }
 828
 829 static __DRIbuffer *
 830 dri2GetBuffersWithFormat(__DRIdrawable * driDrawable,
 831                          int *width, int *height,
 832                          unsigned int *attachments, int count,
 833                          int *out_count, void *loaderPrivate)
 834 {
 835    struct dri2_drawable *pdraw = loaderPrivate;
 836    DRI2Buffer *buffers;
 837
 838    buffers = DRI2GetBuffersWithFormat(pdraw->base.psc->dpy,
 839                                       pdraw->base.xDrawable,
 840                                       width, height, attachments,
 841                                       count, out_count);
 842    if (buffers == NULL)
 843       return NULL;
 844
 845    pdraw->width = *width;
 846    pdraw->height = *height;
 847    process_buffers(pdraw, buffers, *out_count);
 848
 849    free(buffers);
 850
 851    return pdraw->buffers;
 852 }
 853
 854 static int
 855 dri2SetSwapInterval(__GLXDRIdrawable *pdraw, int interval)
 856 {
 857    xcb_connection_t *c = XGetXCBConnection(pdraw->psc->dpy);
 858    struct dri2_drawable *priv =  (struct dri2_drawable *) pdraw;
 859    GLint vblank_mode = DRI_CONF_VBLANK_DEF_INTERVAL_1;
 860    struct dri2_screen *psc = (struct dri2_screen *) priv->base.psc;
 861
 862    if (psc->config)
 863       psc->config->configQueryi(psc->driScreen,
 864                                 "vblank_mode", &vblank_mode);
 865
 866    switch (vblank_mode) {
 867    case DRI_CONF_VBLANK_NEVER:
 868       if (interval != 0)
 869          return GLX_BAD_VALUE;
 870       break;
 871    case DRI_CONF_VBLANK_ALWAYS_SYNC:
 872       if (interval <= 0)
 873          return GLX_BAD_VALUE;
 874       break;
 875    default:
 876       break;
 877    }
 878
 879    xcb_dri2_swap_interval(c, priv->base.xDrawable, interval);
 880    priv->swap_interval = interval;
 881
 882    return 0;
 883 }
 884
 885 static int
 886 dri2GetSwapInterval(__GLXDRIdrawable *pdraw)
 887 {
 888    struct dri2_drawable *priv =  (struct dri2_drawable *) pdraw;
 889
 890   return priv->swap_interval;
 891 }
 892
 893 static const __DRIdri2LoaderExtension dri2LoaderExtension = {
 894    {__DRI_DRI2_LOADER, __DRI_DRI2_LOADER_VERSION},
 895    dri2GetBuffers,
 896    dri2FlushFrontBuffer,
 897    dri2GetBuffersWithFormat,
 898 };
 899
 900 static const __DRIdri2LoaderExtension dri2LoaderExtension_old = {
 901    {__DRI_DRI2_LOADER, __DRI_DRI2_LOADER_VERSION},
 902    dri2GetBuffers,
 903    dri2FlushFrontBuffer,
 904    NULL,
 905 };
 906
 907 static const __DRIuseInvalidateExtension dri2UseInvalidate = {
 908    { __DRI_USE_INVALIDATE, __DRI_USE_INVALIDATE_VERSION }
 909 };
 910
 911 _X_HIDDEN void
 912 dri2InvalidateBuffers(Display *dpy, XID drawable)
 913 {
 914    __GLXDRIdrawable *pdraw =
 915       dri2GetGlxDrawableFromXDrawableId(dpy, drawable);
 916    struct dri2_screen *psc;
 917    struct dri2_drawable *pdp = (struct dri2_drawable *) pdraw;
 918
 919    if (!pdraw)
 920       return;
 921
 922    psc = (struct dri2_screen *) pdraw->psc;
 923
 924    if (pdraw && psc->f && psc->f->base.version >= 3 && psc->f->invalidate)
 925        psc->f->invalidate(pdp->driDrawable);
 926 }
 927
 928 static void
 929 dri2_bind_tex_image(Display * dpy,
 930                     GLXDrawable drawable,
 931                     int buffer, const int *attrib_list)
 932 {
 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 (!pdp->invalidateAvailable && psc->f &&
 946            psc->f->base.version >= 3 && psc->f->invalidate)
 947          psc->f->invalidate(pdraw->driDrawable);
 948
 949       if (psc->texBuffer->base.version >= 2 &&
 950           psc->texBuffer->setTexBuffer2 != NULL) {
 951          (*psc->texBuffer->setTexBuffer2) (pcp->driContext,
 952                                            pdraw->base.textureTarget,
 953                                            pdraw->base.textureFormat,
 954                                            pdraw->driDrawable);
 955       }
 956       else {
 957          (*psc->texBuffer->setTexBuffer) (pcp->driContext,
 958                                           pdraw->base.textureTarget,
 959                                           pdraw->driDrawable);
 960       }
 961    }
 962 }
 963
 964 static void
 965 dri2_release_tex_image(Display * dpy, GLXDrawable drawable, int buffer)
 966 {
 967 #if __DRI_TEX_BUFFER_VERSION >= 3
 968    struct glx_context *gc = __glXGetCurrentContext();
 969    struct dri2_context *pcp = (struct dri2_context *) gc;
 970    __GLXDRIdrawable *base = GetGLXDRIDrawable(dpy, drawable);
 971    struct glx_display *dpyPriv = __glXInitialize(dpy);
 972    struct dri2_drawable *pdraw = (struct dri2_drawable *) base;
 973    struct dri2_display *pdp =
 974       (struct dri2_display *) dpyPriv->dri2Display;
 975    struct dri2_screen *psc;
 976
 977    if (pdraw != NULL) {
 978       psc = (struct dri2_screen *) base->psc;
 979
 980       if (psc->texBuffer->base.version >= 3 &&
 981           psc->texBuffer->releaseTexBuffer != NULL) {
 982          (*psc->texBuffer->releaseTexBuffer) (pcp->driContext,
 983                                            pdraw->base.textureTarget,
 984                                            pdraw->driDrawable);
 985       }
 986    }
 987 #endif
 988 }
 989
 990 static const struct glx_context_vtable dri2_context_vtable = {
 991    dri2_destroy_context,
 992    dri2_bind_context,
 993    dri2_unbind_context,
 994    dri2_wait_gl,
 995    dri2_wait_x,
 996    DRI_glXUseXFont,
 997    dri2_bind_tex_image,
 998    dri2_release_tex_image,
 999    NULL, /* get_proc_address */
1000 };
1001
1002 static void
1003 dri2BindExtensions(struct dri2_screen *psc, const __DRIextension **extensions)
1004 {
1005    int i;
1006
1007    __glXEnableDirectExtension(&psc->base, "GLX_SGI_video_sync");
1008    __glXEnableDirectExtension(&psc->base, "GLX_SGI_swap_control");
1009    __glXEnableDirectExtension(&psc->base, "GLX_MESA_swap_control");
1010    __glXEnableDirectExtension(&psc->base, "GLX_SGI_make_current_read");
1011
1012    /* FIXME: if DRI2 version supports it... */
1013    __glXEnableDirectExtension(&psc->base, "INTEL_swap_event");
1014
1015    if (psc->dri2->base.version >= 3) {
1016       const unsigned mask = psc->dri2->getAPIMask(psc->driScreen);
1017
1018       __glXEnableDirectExtension(&psc->base, "GLX_ARB_create_context");
1019       __glXEnableDirectExtension(&psc->base, "GLX_ARB_create_context_profile");
1020
1021       if ((mask & (1 << __DRI_API_GLES2)) != 0)
1022          __glXEnableDirectExtension(&psc->base,
1023                                     "GLX_EXT_create_context_es2_profile");
1024    }
1025
1026    for (i = 0; extensions[i]; i++) {
1027       if ((strcmp(extensions[i]->name, __DRI_TEX_BUFFER) == 0)) {
1028          psc->texBuffer = (__DRItexBufferExtension *) extensions[i];
1029          __glXEnableDirectExtension(&psc->base, "GLX_EXT_texture_from_pixmap");
1030       }
1031
1032       if ((strcmp(extensions[i]->name, __DRI2_FLUSH) == 0)) {
1033          psc->f = (__DRI2flushExtension *) extensions[i];
1034          /* internal driver extension, no GL extension exposed */
1035       }
1036
1037       if ((strcmp(extensions[i]->name, __DRI2_CONFIG_QUERY) == 0))
1038          psc->config = (__DRI2configQueryExtension *) extensions[i];
1039
1040       if (((strcmp(extensions[i]->name, __DRI2_THROTTLE) == 0)))
1041          psc->throttle = (__DRI2throttleExtension *) extensions[i];
1042
1043       /* DRI2 version 3 is also required because
1044        * GLX_ARB_create_context_robustness requires GLX_ARB_create_context.
1045        */
1046       if (psc->dri2->base.version >= 3
1047           && strcmp(extensions[i]->name, __DRI2_ROBUSTNESS) == 0)
1048          __glXEnableDirectExtension(&psc->base,
1049                                     "GLX_ARB_create_context_robustness");
1050    }
1051 }
1052
1053 static const struct glx_screen_vtable dri2_screen_vtable = {
1054    dri2_create_context,
1055    dri2_create_context_attribs
1056 };
1057
1058 static struct glx_screen *
1059 dri2CreateScreen(int screen, struct glx_display * priv)
1060 {
1061    const __DRIconfig **driver_configs;
1062    const __DRIextension **extensions;
1063    const struct dri2_display *const pdp = (struct dri2_display *)
1064       priv->dri2Display;
1065    struct dri2_screen *psc;
1066    __GLXDRIscreen *psp;
1067    struct glx_config *configs = NULL, *visuals = NULL;
1068    char *driverName, *deviceName, *tmp;
1069    drm_magic_t magic;
1070    int i;
1071
1072    psc = calloc(1, sizeof *psc);
1073    if (psc == NULL)
1074       return NULL;
1075
1076    psc->fd = -1;
1077
1078    if (!glx_screen_init(&psc->base, screen, priv)) {
1079       free(psc);
1080       return NULL;
1081    }
1082
1083    if (!DRI2Connect(priv->dpy, RootWindow(priv->dpy, screen),
1084                     &driverName, &deviceName)) {
1085       glx_screen_cleanup(&psc->base);
1086       free(psc);
1087       InfoMessageF("screen %d does not appear to be DRI2 capable\n", screen);
1088       return NULL;
1089    }
1090
1091    psc->driver = driOpenDriver(driverName);
1092    if (psc->driver == NULL) {
1093       ErrorMessageF("driver pointer missing\n");
1094       goto handle_error;
1095    }
1096
1097    extensions = dlsym(psc->driver, __DRI_DRIVER_EXTENSIONS);
1098    if (extensions == NULL) {
1099       ErrorMessageF("driver exports no extensions (%s)\n", dlerror());
1100       goto handle_error;
1101    }
1102
1103    for (i = 0; extensions[i]; i++) {
1104       if (strcmp(extensions[i]->name, __DRI_CORE) == 0)
1105          psc->core = (__DRIcoreExtension *) extensions[i];
1106       if (strcmp(extensions[i]->name, __DRI_DRI2) == 0)
1107          psc->dri2 = (__DRIdri2Extension *) extensions[i];
1108    }
1109
1110    if (psc->core == NULL || psc->dri2 == NULL) {
1111       ErrorMessageF("core dri or dri2 extension not found\n");
1112       goto handle_error;
1113    }
1114
1115 #ifdef O_CLOEXEC
1116    psc->fd = open(deviceName, O_RDWR | O_CLOEXEC);
1117    if (psc->fd == -1 && errno == EINVAL)
1118 #endif
1119    {
1120       psc->fd = open(deviceName, O_RDWR);
1121       if (psc->fd != -1)
1122          fcntl(psc->fd, F_SETFD, fcntl(psc->fd, F_GETFD) | FD_CLOEXEC);
1123    }
1124    if (psc->fd < 0) {
1125       ErrorMessageF("failed to open drm device: %s\n", strerror(errno));
1126       goto handle_error;
1127    }
1128
1129    if (drmGetMagic(psc->fd, &magic)) {
1130       ErrorMessageF("failed to get magic\n");
1131       goto handle_error;
1132    }
1133
1134    if (!DRI2Authenticate(priv->dpy, RootWindow(priv->dpy, screen), magic)) {
1135       ErrorMessageF("failed to authenticate magic %d\n", magic);
1136       goto handle_error;
1137    }
1138
1139
1140    /* If the server does not support the protocol for
1141     * DRI2GetBuffersWithFormat, don't supply that interface to the driver.
1142     */
1143    psc->driScreen =
1144       psc->dri2->createNewScreen(screen, psc->fd,
1145                                  (const __DRIextension **)
1146                                  &pdp->loader_extensions[0],
1147                                  &driver_configs, psc);
1148
1149    if (psc->driScreen == NULL) {
1150       ErrorMessageF("failed to create dri screen\n");
1151       goto handle_error;
1152    }
1153
1154    extensions = psc->core->getExtensions(psc->driScreen);
1155    dri2BindExtensions(psc, extensions);
1156
1157    configs = driConvertConfigs(psc->core, psc->base.configs, driver_configs);
1158    visuals = driConvertConfigs(psc->core, psc->base.visuals, driver_configs);
1159
1160    if (!configs || !visuals)
1161        goto handle_error;
1162
1163    glx_config_destroy_list(psc->base.configs);
1164    psc->base.configs = configs;
1165    glx_config_destroy_list(psc->base.visuals);
1166    psc->base.visuals = visuals;
1167
1168    psc->driver_configs = driver_configs;
1169
1170    psc->base.vtable = &dri2_screen_vtable;
1171    psp = &psc->vtable;
1172    psc->base.driScreen = psp;
1173    psp->destroyScreen = dri2DestroyScreen;
1174    psp->createDrawable = dri2CreateDrawable;
1175    psp->swapBuffers = dri2SwapBuffers;
1176    psp->getDrawableMSC = NULL;
1177    psp->waitForMSC = NULL;
1178    psp->waitForSBC = NULL;
1179    psp->setSwapInterval = NULL;
1180    psp->getSwapInterval = NULL;
1181
1182    if (pdp->driMinor >= 2) {
1183       psp->getDrawableMSC = dri2DrawableGetMSC;
1184       psp->waitForMSC = dri2WaitForMSC;
1185       psp->waitForSBC = dri2WaitForSBC;
1186       psp->setSwapInterval = dri2SetSwapInterval;
1187       psp->getSwapInterval = dri2GetSwapInterval;
1188       __glXEnableDirectExtension(&psc->base, "GLX_OML_sync_control");
1189    }
1190
1191    /* DRI2 suports SubBuffer through DRI2CopyRegion, so it's always
1192     * available.*/
1193    psp->copySubBuffer = dri2CopySubBuffer;
1194    __glXEnableDirectExtension(&psc->base, "GLX_MESA_copy_sub_buffer");
1195
1196    free(driverName);
1197    free(deviceName);
1198
1199    tmp = getenv("LIBGL_SHOW_FPS");
1200    psc->show_fps = tmp && strcmp(tmp, "1") == 0;
1201
1202    return &psc->base;
1203
1204 handle_error:
1205    CriticalErrorMessageF("failed to load driver: %s\n", driverName);
1206
1207    if (configs)
1208        glx_config_destroy_list(configs);
1209    if (visuals)
1210        glx_config_destroy_list(visuals);
1211    if (psc->driScreen)
1212        psc->core->destroyScreen(psc->driScreen);
1213    psc->driScreen = NULL;
1214    if (psc->fd >= 0)
1215       close(psc->fd);
1216    if (psc->driver)
1217       dlclose(psc->driver);
1218
1219    free(driverName);
1220    free(deviceName);
1221    glx_screen_cleanup(&psc->base);
1222    free(psc);
1223
1224    return NULL;
1225 }
1226
1227 /* Called from __glXFreeDisplayPrivate.
1228  */
1229 static void
1230 dri2DestroyDisplay(__GLXDRIdisplay * dpy)
1231 {
1232    struct dri2_display *pdp = (struct dri2_display *) dpy;
1233
1234    __glxHashDestroy(pdp->dri2Hash);
1235    free(dpy);
1236 }
1237
1238 _X_HIDDEN __GLXDRIdrawable *
1239 dri2GetGlxDrawableFromXDrawableId(Display *dpy, XID id)
1240 {
1241    struct glx_display *d = __glXInitialize(dpy);
1242    struct dri2_display *pdp = (struct dri2_display *) d->dri2Display;
1243    __GLXDRIdrawable *pdraw;
1244
1245    if (__glxHashLookup(pdp->dri2Hash, id, (void *) &pdraw) == 0)
1246       return pdraw;
1247
1248    return NULL;
1249 }
1250
1251 /*
1252  * Allocate, initialize and return a __DRIdisplayPrivate object.
1253  * This is called from __glXInitialize() when we are given a new
1254  * display pointer.
1255  */
1256 _X_HIDDEN __GLXDRIdisplay *
1257 dri2CreateDisplay(Display * dpy)
1258 {
1259    struct dri2_display *pdp;
1260    int eventBase, errorBase, i;
1261
1262    if (!DRI2QueryExtension(dpy, &eventBase, &errorBase))
1263       return NULL;
1264
1265    pdp = malloc(sizeof *pdp);
1266    if (pdp == NULL)
1267       return NULL;
1268
1269    if (!DRI2QueryVersion(dpy, &pdp->driMajor, &pdp->driMinor)) {
1270       free(pdp);
1271       return NULL;
1272    }
1273
1274    pdp->driPatch = 0;
1275    pdp->swapAvailable = (pdp->driMinor >= 2);
1276    pdp->invalidateAvailable = (pdp->driMinor >= 3);
1277
1278    pdp->base.destroyDisplay = dri2DestroyDisplay;
1279    pdp->base.createScreen = dri2CreateScreen;
1280
1281    i = 0;
1282    if (pdp->driMinor < 1)
1283       pdp->loader_extensions[i++] = &dri2LoaderExtension_old.base;
1284    else
1285       pdp->loader_extensions[i++] = &dri2LoaderExtension.base;
1286
1287    pdp->loader_extensions[i++] = &systemTimeExtension.base;
1288
1289    pdp->loader_extensions[i++] = &dri2UseInvalidate.base;
1290
1291    pdp->loader_extensions[i++] = NULL;
1292
1293    pdp->dri2Hash = __glxHashCreate();
1294    if (pdp->dri2Hash == NULL) {
1295       free(pdp);
1296       return NULL;
1297    }
1298
1299    return &pdp->base;
1300 }
1301
1302 #endif /* GLX_DIRECT_RENDERING */