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 #ifdef GLX_DIRECT_RENDERING
  34
  35 #include <X11/Xlib.h>
  36 #include <X11/extensions/Xfixes.h>
  37 #include <X11/extensions/Xdamage.h>
  38 #include "glapi.h"
  39 #include "glxclient.h"
  40 #include <X11/extensions/dri2proto.h>
  41 #include "xf86dri.h"
  42 #include <dlfcn.h>
  43 #include <fcntl.h>
  44 #include <unistd.h>
  45 #include <sys/types.h>
  46 #include <sys/mman.h>
  47 #include "xf86drm.h"
  48 #include "dri2.h"
  49 #include "dri_common.h"
  50
  51 /* From xmlpool/options.h, user exposed so should be stable */
  52 #define DRI_CONF_VBLANK_NEVER 0
  53 #define DRI_CONF_VBLANK_DEF_INTERVAL_0 1
  54 #define DRI_CONF_VBLANK_DEF_INTERVAL_1 2
  55 #define DRI_CONF_VBLANK_ALWAYS_SYNC 3
  56
  57 #undef DRI2_MINOR
  58 #define DRI2_MINOR 1
  59
  60 typedef struct __GLXDRIdisplayPrivateRec __GLXDRIdisplayPrivate;
  61 typedef struct __GLXDRIcontextPrivateRec __GLXDRIcontextPrivate;
  62 typedef struct __GLXDRIdrawablePrivateRec __GLXDRIdrawablePrivate;
  63
  64 struct __GLXDRIdisplayPrivateRec
  65 {
  66    __GLXDRIdisplay base;
  67
  68    /*
  69     ** XFree86-DRI version information
  70     */
  71    int driMajor;
  72    int driMinor;
  73    int driPatch;
  74    int swapAvailable;
  75    int invalidateAvailable;
  76 };
  77
  78 struct __GLXDRIcontextPrivateRec
  79 {
  80    __GLXDRIcontext base;
  81    __DRIcontext *driContext;
  82    __GLXscreenConfigs *psc;
  83 };
  84
  85 struct __GLXDRIdrawablePrivateRec
  86 {
  87    __GLXDRIdrawable base;
  88    __DRIbuffer buffers[5];
  89    int bufferCount;
  90    int width, height;
  91    int have_back;
  92    int have_fake_front;
  93    int swap_interval;
  94 };
  95
  96 static void dri2WaitX(__GLXDRIdrawable * pdraw);
  97
  98 static void
  99 dri2DestroyContext(__GLXDRIcontext * context,
 100                    __GLXscreenConfigs * psc, Display * dpy)
 101 {
 102    __GLXDRIcontextPrivate *pcp = (__GLXDRIcontextPrivate *) context;
 103    const __DRIcoreExtension *core = pcp->psc->core;
 104
 105    (*core->destroyContext) (pcp->driContext);
 106
 107    Xfree(pcp);
 108 }
 109
 110 static Bool
 111 dri2BindContext(__GLXDRIcontext * context,
 112                 __GLXDRIdrawable * draw, __GLXDRIdrawable * read)
 113 {
 114    __GLXDRIcontextPrivate *pcp = (__GLXDRIcontextPrivate *) context;
 115    const __DRIcoreExtension *core = pcp->psc->core;
 116
 117    return (*core->bindContext) (pcp->driContext,
 118                                 draw->driDrawable, read->driDrawable);
 119 }
 120
 121 static void
 122 dri2UnbindContext(__GLXDRIcontext * context)
 123 {
 124    __GLXDRIcontextPrivate *pcp = (__GLXDRIcontextPrivate *) context;
 125    const __DRIcoreExtension *core = pcp->psc->core;
 126
 127    (*core->unbindContext) (pcp->driContext);
 128 }
 129
 130 static __GLXDRIcontext *
 131 dri2CreateContext(__GLXscreenConfigs * psc,
 132                   const __GLcontextModes * mode,
 133                   GLXContext gc, GLXContext shareList, int renderType)
 134 {
 135    __GLXDRIcontextPrivate *pcp, *pcp_shared;
 136    __GLXDRIconfigPrivate *config = (__GLXDRIconfigPrivate *) mode;
 137    __DRIcontext *shared = NULL;
 138
 139    if (shareList) {
 140       pcp_shared = (__GLXDRIcontextPrivate *) shareList->driContext;
 141       shared = pcp_shared->driContext;
 142    }
 143
 144    pcp = Xmalloc(sizeof *pcp);
 145    if (pcp == NULL)
 146       return NULL;
 147
 148    pcp->psc = psc;
 149    pcp->driContext =
 150       (*psc->dri2->createNewContext) (psc->__driScreen,
 151                                       config->driConfig, shared, pcp);
 152    gc->__driContext = pcp->driContext;
 153
 154    if (pcp->driContext == NULL) {
 155       Xfree(pcp);
 156       return NULL;
 157    }
 158
 159    pcp->base.destroyContext = dri2DestroyContext;
 160    pcp->base.bindContext = dri2BindContext;
 161    pcp->base.unbindContext = dri2UnbindContext;
 162
 163    return &pcp->base;
 164 }
 165
 166 static void
 167 dri2DestroyDrawable(__GLXDRIdrawable * pdraw)
 168 {
 169    const __DRIcoreExtension *core = pdraw->psc->core;
 170
 171    (*core->destroyDrawable) (pdraw->driDrawable);
 172    DRI2DestroyDrawable(pdraw->psc->dpy, pdraw->xDrawable);
 173    Xfree(pdraw);
 174 }
 175
 176 static __GLXDRIdrawable *
 177 dri2CreateDrawable(__GLXscreenConfigs * psc,
 178                    XID xDrawable,
 179                    GLXDrawable drawable, const __GLcontextModes * modes)
 180 {
 181    __GLXDRIdrawablePrivate *pdraw;
 182    __GLXDRIconfigPrivate *config = (__GLXDRIconfigPrivate *) modes;
 183    __GLXdisplayPrivate *dpyPriv;
 184    __GLXDRIdisplayPrivate *pdp;
 185    GLint vblank_mode = DRI_CONF_VBLANK_DEF_INTERVAL_1;
 186
 187    pdraw = Xmalloc(sizeof(*pdraw));
 188    if (!pdraw)
 189       return NULL;
 190
 191    pdraw->base.destroyDrawable = dri2DestroyDrawable;
 192    pdraw->base.xDrawable = xDrawable;
 193    pdraw->base.drawable = drawable;
 194    pdraw->base.psc = psc;
 195    pdraw->bufferCount = 0;
 196    pdraw->swap_interval = 1; /* default may be overridden below */
 197
 198    if (psc->config)
 199       psc->config->configQueryi(psc->__driScreen, "vblank_mode", &vblank_mode);
 200
 201    switch (vblank_mode) {
 202    case DRI_CONF_VBLANK_NEVER:
 203    case DRI_CONF_VBLANK_DEF_INTERVAL_0:
 204       pdraw->swap_interval = 0;
 205       break;
 206    case DRI_CONF_VBLANK_DEF_INTERVAL_1:
 207    case DRI_CONF_VBLANK_ALWAYS_SYNC:
 208    default:
 209       pdraw->swap_interval = 1;
 210       break;
 211    }
 212
 213    DRI2CreateDrawable(psc->dpy, xDrawable);
 214
 215    dpyPriv = __glXInitialize(psc->dpy);
 216    pdp = (__GLXDRIdisplayPrivate *)dpyPriv->dri2Display;;
 217    /* Create a new drawable */
 218    pdraw->base.driDrawable =
 219       (*psc->dri2->createNewDrawable) (psc->__driScreen,
 220                                        config->driConfig, pdraw);
 221
 222    if (!pdraw->base.driDrawable) {
 223       DRI2DestroyDrawable(psc->dpy, xDrawable);
 224       Xfree(pdraw);
 225       return NULL;
 226    }
 227
 228 #ifdef X_DRI2SwapInterval
 229    /*
 230     * Make sure server has the same swap interval we do for the new
 231     * drawable.
 232     */
 233    if (pdp->swapAvailable)
 234       DRI2SwapInterval(psc->dpy, xDrawable, pdraw->swap_interval);
 235 #endif
 236
 237    return &pdraw->base;
 238 }
 239
 240 #ifdef X_DRI2GetMSC
 241
 242 static int
 243 dri2DrawableGetMSC(__GLXscreenConfigs *psc, __GLXDRIdrawable *pdraw,
 244                    int64_t *ust, int64_t *msc, int64_t *sbc)
 245 {
 246    return DRI2GetMSC(psc->dpy, pdraw->xDrawable, ust, msc, sbc);
 247 }
 248
 249 #endif
 250
 251
 252 #ifdef X_DRI2WaitMSC
 253
 254 static int
 255 dri2WaitForMSC(__GLXDRIdrawable *pdraw, int64_t target_msc, int64_t divisor,
 256                int64_t remainder, int64_t *ust, int64_t *msc, int64_t *sbc)
 257 {
 258    return DRI2WaitMSC(pdraw->psc->dpy, pdraw->xDrawable, target_msc, divisor,
 259                       remainder, ust, msc, sbc);
 260 }
 261
 262 static int
 263 dri2WaitForSBC(__GLXDRIdrawable *pdraw, int64_t target_sbc, int64_t *ust,
 264                int64_t *msc, int64_t *sbc)
 265 {
 266    return DRI2WaitSBC(pdraw->psc->dpy, pdraw->xDrawable, target_sbc, ust, msc,
 267                       sbc);
 268 }
 269
 270 #endif /* X_DRI2WaitMSC */
 271
 272 static void
 273 dri2CopySubBuffer(__GLXDRIdrawable *pdraw, int x, int y, int width, int height)
 274 {
 275    __GLXDRIdrawablePrivate *priv = (__GLXDRIdrawablePrivate *) pdraw;
 276    XRectangle xrect;
 277    XserverRegion region;
 278
 279    /* Check we have the right attachments */
 280    if (!priv->have_back)
 281       return;
 282
 283    xrect.x = x;
 284    xrect.y = priv->height - y - height;
 285    xrect.width = width;
 286    xrect.height = height;
 287
 288 #ifdef __DRI2_FLUSH
 289    if (pdraw->psc->f)
 290       (*pdraw->psc->f->flush) (pdraw->driDrawable);
 291 #endif
 292
 293    region = XFixesCreateRegion(pdraw->psc->dpy, &xrect, 1);
 294    /* should get a fence ID back from here at some point */
 295    DRI2CopyRegion(pdraw->psc->dpy, pdraw->xDrawable, region,
 296                   DRI2BufferFrontLeft, DRI2BufferBackLeft);
 297    XFixesDestroyRegion(pdraw->psc->dpy, region);
 298
 299    /* Refresh the fake front (if present) after we just damaged the real
 300     * front.
 301     */
 302    dri2WaitX(pdraw);
 303 }
 304
 305 static void
 306 dri2WaitX(__GLXDRIdrawable *pdraw)
 307 {
 308    __GLXDRIdrawablePrivate *priv = (__GLXDRIdrawablePrivate *) pdraw;
 309    XRectangle xrect;
 310    XserverRegion region;
 311
 312    /* Check we have the right attachments */
 313    if (!priv->have_fake_front)
 314       return;
 315
 316    xrect.x = 0;
 317    xrect.y = 0;
 318    xrect.width = priv->width;
 319    xrect.height = priv->height;
 320
 321 #ifdef __DRI2_FLUSH
 322    if (pdraw->psc->f)
 323       (*pdraw->psc->f->flush) (pdraw->driDrawable);
 324 #endif
 325
 326    region = XFixesCreateRegion(pdraw->psc->dpy, &xrect, 1);
 327    DRI2CopyRegion(pdraw->psc->dpy, pdraw->xDrawable, region,
 328                   DRI2BufferFakeFrontLeft, DRI2BufferFrontLeft);
 329    XFixesDestroyRegion(pdraw->psc->dpy, region);
 330 }
 331
 332 static void
 333 dri2WaitGL(__GLXDRIdrawable * pdraw)
 334 {
 335    __GLXDRIdrawablePrivate *priv = (__GLXDRIdrawablePrivate *) pdraw;
 336    XRectangle xrect;
 337    XserverRegion region;
 338
 339    if (!priv->have_fake_front)
 340       return;
 341
 342    xrect.x = 0;
 343    xrect.y = 0;
 344    xrect.width = priv->width;
 345    xrect.height = priv->height;
 346
 347 #ifdef __DRI2_FLUSH
 348    if (pdraw->psc->f)
 349       (*pdraw->psc->f->flush) (pdraw->driDrawable);
 350 #endif
 351
 352    region = XFixesCreateRegion(pdraw->psc->dpy, &xrect, 1);
 353    DRI2CopyRegion(pdraw->psc->dpy, pdraw->xDrawable, region,
 354                   DRI2BufferFrontLeft, DRI2BufferFakeFrontLeft);
 355    XFixesDestroyRegion(pdraw->psc->dpy, region);
 356 }
 357
 358 static void
 359 dri2FlushFrontBuffer(__DRIdrawable *driDrawable, void *loaderPrivate)
 360 {
 361    __GLXDRIdrawablePrivate *pdraw = loaderPrivate;
 362    __GLXdisplayPrivate *priv = __glXInitialize(pdraw->base.psc->dpy);
 363    __GLXDRIdisplayPrivate *pdp = (__GLXDRIdisplayPrivate *)priv->dri2Display;
 364
 365    /* Old servers don't send invalidate events */
 366    if (!pdp->invalidateAvailable)
 367        dri2InvalidateBuffers(priv->dpy, pdraw->base.drawable);
 368
 369    dri2WaitGL(loaderPrivate);
 370 }
 371
 372
 373 static void
 374 dri2DestroyScreen(__GLXscreenConfigs * psc)
 375 {
 376    /* Free the direct rendering per screen data */
 377    (*psc->core->destroyScreen) (psc->__driScreen);
 378    close(psc->fd);
 379    psc->__driScreen = NULL;
 380 }
 381
 382 /**
 383  * Process list of buffer received from the server
 384  *
 385  * Processes the list of buffers received in a reply from the server to either
 386  * \c DRI2GetBuffers or \c DRI2GetBuffersWithFormat.
 387  */
 388 static void
 389 process_buffers(__GLXDRIdrawablePrivate * pdraw, DRI2Buffer * buffers,
 390                 unsigned count)
 391 {
 392    int i;
 393
 394    pdraw->bufferCount = count;
 395    pdraw->have_fake_front = 0;
 396    pdraw->have_back = 0;
 397
 398    /* This assumes the DRI2 buffer attachment tokens matches the
 399     * __DRIbuffer tokens. */
 400    for (i = 0; i < count; i++) {
 401       pdraw->buffers[i].attachment = buffers[i].attachment;
 402       pdraw->buffers[i].name = buffers[i].name;
 403       pdraw->buffers[i].pitch = buffers[i].pitch;
 404       pdraw->buffers[i].cpp = buffers[i].cpp;
 405       pdraw->buffers[i].flags = buffers[i].flags;
 406       if (pdraw->buffers[i].attachment == __DRI_BUFFER_FAKE_FRONT_LEFT)
 407          pdraw->have_fake_front = 1;
 408       if (pdraw->buffers[i].attachment == __DRI_BUFFER_BACK_LEFT)
 409          pdraw->have_back = 1;
 410    }
 411
 412 }
 413
 414 static int64_t
 415 dri2SwapBuffers(__GLXDRIdrawable *pdraw, int64_t target_msc, int64_t divisor,
 416                 int64_t remainder)
 417 {
 418     __GLXDRIdrawablePrivate *priv = (__GLXDRIdrawablePrivate *) pdraw;
 419     __GLXdisplayPrivate *dpyPriv = __glXInitialize(priv->base.psc->dpy);
 420     __GLXDRIdisplayPrivate *pdp =
 421         (__GLXDRIdisplayPrivate *)dpyPriv->dri2Display;
 422     int64_t ret;
 423
 424 #ifdef __DRI2_FLUSH
 425     if (pdraw->psc->f)
 426         (*pdraw->psc->f->flush)(pdraw->driDrawable);
 427 #endif
 428
 429     /* Old servers don't send invalidate events */
 430     if (!pdp->invalidateAvailable)
 431        dri2InvalidateBuffers(dpyPriv->dpy, pdraw->drawable);
 432
 433     /* Old servers can't handle swapbuffers */
 434     if (!pdp->swapAvailable) {
 435        dri2CopySubBuffer(pdraw, 0, 0, priv->width, priv->height);
 436        return 0;
 437     }
 438
 439 #ifdef X_DRI2SwapBuffers
 440     DRI2SwapBuffers(pdraw->psc->dpy, pdraw->xDrawable, target_msc, divisor,
 441                     remainder, &ret);
 442 #endif
 443
 444     return ret;
 445 }
 446
 447 static __DRIbuffer *
 448 dri2GetBuffers(__DRIdrawable * driDrawable,
 449                int *width, int *height,
 450                unsigned int *attachments, int count,
 451                int *out_count, void *loaderPrivate)
 452 {
 453    __GLXDRIdrawablePrivate *pdraw = loaderPrivate;
 454    DRI2Buffer *buffers;
 455
 456    buffers = DRI2GetBuffers(pdraw->base.psc->dpy, pdraw->base.xDrawable,
 457                             width, height, attachments, count, out_count);
 458    if (buffers == NULL)
 459       return NULL;
 460
 461    pdraw->width = *width;
 462    pdraw->height = *height;
 463    process_buffers(pdraw, buffers, *out_count);
 464
 465    Xfree(buffers);
 466
 467    return pdraw->buffers;
 468 }
 469
 470 static __DRIbuffer *
 471 dri2GetBuffersWithFormat(__DRIdrawable * driDrawable,
 472                          int *width, int *height,
 473                          unsigned int *attachments, int count,
 474                          int *out_count, void *loaderPrivate)
 475 {
 476    __GLXDRIdrawablePrivate *pdraw = loaderPrivate;
 477    DRI2Buffer *buffers;
 478
 479    buffers = DRI2GetBuffersWithFormat(pdraw->base.psc->dpy,
 480                                       pdraw->base.xDrawable,
 481                                       width, height, attachments,
 482                                       count, out_count);
 483    if (buffers == NULL)
 484       return NULL;
 485
 486    pdraw->width = *width;
 487    pdraw->height = *height;
 488    process_buffers(pdraw, buffers, *out_count);
 489
 490    Xfree(buffers);
 491
 492    return pdraw->buffers;
 493 }
 494
 495 #ifdef X_DRI2SwapInterval
 496
 497 static void
 498 dri2SetSwapInterval(__GLXDRIdrawable *pdraw, int interval)
 499 {
 500    __GLXscreenConfigs *psc = pdraw->psc;
 501    __GLXDRIdrawablePrivate *priv =  (__GLXDRIdrawablePrivate *) pdraw;
 502    GLint vblank_mode = DRI_CONF_VBLANK_DEF_INTERVAL_1;
 503
 504    if (psc->config)
 505       psc->config->configQueryi(psc->__driScreen, "vblank_mode", &vblank_mode);
 506
 507    switch (vblank_mode) {
 508    case DRI_CONF_VBLANK_NEVER:
 509       return;
 510    case DRI_CONF_VBLANK_ALWAYS_SYNC:
 511       if (interval <= 0)
 512          return;
 513       break;
 514    default:
 515       break;
 516    }
 517
 518    DRI2SwapInterval(priv->base.psc->dpy, pdraw->xDrawable, interval);
 519    priv->swap_interval = interval;
 520 }
 521
 522 static unsigned int
 523 dri2GetSwapInterval(__GLXDRIdrawable *pdraw)
 524 {
 525    __GLXDRIdrawablePrivate *priv =  (__GLXDRIdrawablePrivate *) pdraw;
 526
 527   return priv->swap_interval;
 528 }
 529
 530 #endif /* X_DRI2SwapInterval */
 531
 532 static const __DRIdri2LoaderExtension dri2LoaderExtension = {
 533    {__DRI_DRI2_LOADER, __DRI_DRI2_LOADER_VERSION},
 534    dri2GetBuffers,
 535    dri2FlushFrontBuffer,
 536    dri2GetBuffersWithFormat,
 537 };
 538
 539 static const __DRIdri2LoaderExtension dri2LoaderExtension_old = {
 540    {__DRI_DRI2_LOADER, __DRI_DRI2_LOADER_VERSION},
 541    dri2GetBuffers,
 542    dri2FlushFrontBuffer,
 543    NULL,
 544 };
 545
 546 static const __DRIextension *loader_extensions[] = {
 547    &dri2LoaderExtension.base,
 548    &systemTimeExtension.base,
 549    NULL
 550 };
 551
 552 static const __DRIextension *loader_extensions_old[] = {
 553    &dri2LoaderExtension_old.base,
 554    &systemTimeExtension.base,
 555    NULL
 556 };
 557
 558 _X_HIDDEN void
 559 dri2InvalidateBuffers(Display *dpy, XID drawable)
 560 {
 561    __GLXDRIdrawable *pdraw = GetGLXDRIDrawable(dpy, drawable, NULL);
 562
 563 #if __DRI2_FLUSH_VERSION >= 3
 564    if (pdraw && pdraw->psc->f)
 565        pdraw->psc->f->invalidate(pdraw->driDrawable);
 566 #endif
 567 }
 568
 569 static __GLXDRIscreen *
 570 dri2CreateScreen(__GLXscreenConfigs * psc, int screen,
 571                  __GLXdisplayPrivate * priv)
 572 {
 573    const __DRIconfig **driver_configs;
 574    const __DRIextension **extensions;
 575    const __GLXDRIdisplayPrivate *const pdp = (__GLXDRIdisplayPrivate *)
 576       priv->dri2Display;
 577    __GLXDRIscreen *psp;
 578    char *driverName, *deviceName;
 579    drm_magic_t magic;
 580    int i;
 581
 582    psp = Xmalloc(sizeof *psp);
 583    if (psp == NULL)
 584       return NULL;
 585
 586    if (!DRI2Connect(psc->dpy, RootWindow(psc->dpy, screen),
 587                     &driverName, &deviceName)) {
 588       XFree(psp);
 589       return NULL;
 590    }
 591
 592    psc->driver = driOpenDriver(driverName);
 593    if (psc->driver == NULL) {
 594       ErrorMessageF("driver pointer missing\n");
 595       goto handle_error;
 596    }
 597
 598    extensions = dlsym(psc->driver, __DRI_DRIVER_EXTENSIONS);
 599    if (extensions == NULL) {
 600       ErrorMessageF("driver exports no extensions (%s)\n", dlerror());
 601       goto handle_error;
 602    }
 603
 604    for (i = 0; extensions[i]; i++) {
 605       if (strcmp(extensions[i]->name, __DRI_CORE) == 0)
 606          psc->core = (__DRIcoreExtension *) extensions[i];
 607       if (strcmp(extensions[i]->name, __DRI_DRI2) == 0)
 608          psc->dri2 = (__DRIdri2Extension *) extensions[i];
 609    }
 610
 611    if (psc->core == NULL || psc->dri2 == NULL) {
 612       ErrorMessageF("core dri or dri2 extension not found\n");
 613       goto handle_error;
 614    }
 615
 616    psc->fd = open(deviceName, O_RDWR);
 617    if (psc->fd < 0) {
 618       ErrorMessageF("failed to open drm device: %s\n", strerror(errno));
 619       goto handle_error;
 620    }
 621
 622    if (drmGetMagic(psc->fd, &magic)) {
 623       ErrorMessageF("failed to get magic\n");
 624       goto handle_error;
 625    }
 626
 627    if (!DRI2Authenticate(psc->dpy, RootWindow(psc->dpy, screen), magic)) {
 628       ErrorMessageF("failed to authenticate magic %d\n", magic);
 629       goto handle_error;
 630    }
 631
 632    /* If the server does not support the protocol for
 633     * DRI2GetBuffersWithFormat, don't supply that interface to the driver.
 634     */
 635    psc->__driScreen =
 636       psc->dri2->createNewScreen(screen, psc->fd, ((pdp->driMinor < 1)
 637                                                    ? loader_extensions_old
 638                                                    : loader_extensions),
 639                                  &driver_configs, psc);
 640
 641    if (psc->__driScreen == NULL) {
 642       ErrorMessageF("failed to create dri screen\n");
 643       goto handle_error;
 644    }
 645
 646    driBindCommonExtensions(psc);
 647    dri2BindExtensions(psc);
 648
 649    psc->configs = driConvertConfigs(psc->core, psc->configs, driver_configs);
 650    psc->visuals = driConvertConfigs(psc->core, psc->visuals, driver_configs);
 651
 652    psc->driver_configs = driver_configs;
 653
 654    psp->destroyScreen = dri2DestroyScreen;
 655    psp->createContext = dri2CreateContext;
 656    psp->createDrawable = dri2CreateDrawable;
 657    psp->swapBuffers = dri2SwapBuffers;
 658    psp->waitGL = dri2WaitGL;
 659    psp->waitX = dri2WaitX;
 660    psp->getDrawableMSC = NULL;
 661    psp->waitForMSC = NULL;
 662    psp->waitForSBC = NULL;
 663    psp->setSwapInterval = NULL;
 664    psp->getSwapInterval = NULL;
 665
 666    if (pdp->driMinor >= 2) {
 667 #ifdef X_DRI2GetMSC
 668       psp->getDrawableMSC = dri2DrawableGetMSC;
 669 #endif
 670 #ifdef X_DRI2WaitMSC
 671       psp->waitForMSC = dri2WaitForMSC;
 672       psp->waitForSBC = dri2WaitForSBC;
 673 #endif
 674 #ifdef X_DRI2SwapInterval
 675       psp->setSwapInterval = dri2SetSwapInterval;
 676       psp->getSwapInterval = dri2GetSwapInterval;
 677 #endif
 678 #if defined(X_DRI2GetMSC) && defined(X_DRI2WaitMSC) && defined(X_DRI2SwapInterval)
 679       __glXEnableDirectExtension(psc, "GLX_OML_sync_control");
 680 #endif
 681    }
 682
 683    /* DRI2 suports SubBuffer through DRI2CopyRegion, so it's always
 684     * available.*/
 685    psp->copySubBuffer = dri2CopySubBuffer;
 686    __glXEnableDirectExtension(psc, "GLX_MESA_copy_sub_buffer");
 687
 688    Xfree(driverName);
 689    Xfree(deviceName);
 690
 691    return psp;
 692
 693 handle_error:
 694    Xfree(driverName);
 695    Xfree(deviceName);
 696    XFree(psp);
 697
 698    /* FIXME: clean up here */
 699
 700    return NULL;
 701 }
 702
 703 /* Called from __glXFreeDisplayPrivate.
 704  */
 705 static void
 706 dri2DestroyDisplay(__GLXDRIdisplay * dpy)
 707 {
 708    Xfree(dpy);
 709 }
 710
 711 /*
 712  * Allocate, initialize and return a __DRIdisplayPrivate object.
 713  * This is called from __glXInitialize() when we are given a new
 714  * display pointer.
 715  */
 716 _X_HIDDEN __GLXDRIdisplay *
 717 dri2CreateDisplay(Display * dpy)
 718 {
 719    __GLXDRIdisplayPrivate *pdp;
 720    int eventBase, errorBase;
 721
 722    if (!DRI2QueryExtension(dpy, &eventBase, &errorBase))
 723       return NULL;
 724
 725    pdp = Xmalloc(sizeof *pdp);
 726    if (pdp == NULL)
 727       return NULL;
 728
 729    if (!DRI2QueryVersion(dpy, &pdp->driMajor, &pdp->driMinor)) {
 730       Xfree(pdp);
 731       return NULL;
 732    }
 733
 734    pdp->driPatch = 0;
 735    pdp->swapAvailable = (pdp->driMinor >= 2);
 736    pdp->invalidateAvailable = (pdp->driMinor >= 3);
 737
 738    pdp->base.destroyDisplay = dri2DestroyDisplay;
 739    pdp->base.createScreen = dri2CreateScreen;
 740
 741    return &pdp->base;
 742 }
 743
 744 #endif /* GLX_DIRECT_RENDERING */