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/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    pdraw->have_back = 0;
 198
 199    if (psc->config)
 200       psc->config->configQueryi(psc->__driScreen, "vblank_mode", &vblank_mode);
 201
 202    switch (vblank_mode) {
 203    case DRI_CONF_VBLANK_NEVER:
 204    case DRI_CONF_VBLANK_DEF_INTERVAL_0:
 205       pdraw->swap_interval = 0;
 206       break;
 207    case DRI_CONF_VBLANK_DEF_INTERVAL_1:
 208    case DRI_CONF_VBLANK_ALWAYS_SYNC:
 209    default:
 210       pdraw->swap_interval = 1;
 211       break;
 212    }
 213
 214    DRI2CreateDrawable(psc->dpy, xDrawable);
 215
 216    dpyPriv = __glXInitialize(psc->dpy);
 217    pdp = (__GLXDRIdisplayPrivate *)dpyPriv->dri2Display;;
 218    /* Create a new drawable */
 219    pdraw->base.driDrawable =
 220       (*psc->dri2->createNewDrawable) (psc->__driScreen,
 221                                        config->driConfig, pdraw);
 222
 223    if (!pdraw->base.driDrawable) {
 224       DRI2DestroyDrawable(psc->dpy, xDrawable);
 225       Xfree(pdraw);
 226       return NULL;
 227    }
 228
 229 #ifdef X_DRI2SwapInterval
 230    /*
 231     * Make sure server has the same swap interval we do for the new
 232     * drawable.
 233     */
 234    if (pdp->swapAvailable)
 235       DRI2SwapInterval(psc->dpy, xDrawable, pdraw->swap_interval);
 236 #endif
 237
 238    return &pdraw->base;
 239 }
 240
 241 #ifdef X_DRI2GetMSC
 242
 243 static int
 244 dri2DrawableGetMSC(__GLXscreenConfigs *psc, __GLXDRIdrawable *pdraw,
 245                    int64_t *ust, int64_t *msc, int64_t *sbc)
 246 {
 247    return DRI2GetMSC(psc->dpy, pdraw->xDrawable, ust, msc, sbc);
 248 }
 249
 250 #endif
 251
 252
 253 #ifdef X_DRI2WaitMSC
 254
 255 static int
 256 dri2WaitForMSC(__GLXDRIdrawable *pdraw, int64_t target_msc, int64_t divisor,
 257                int64_t remainder, int64_t *ust, int64_t *msc, int64_t *sbc)
 258 {
 259    return DRI2WaitMSC(pdraw->psc->dpy, pdraw->xDrawable, target_msc, divisor,
 260                       remainder, ust, msc, sbc);
 261 }
 262
 263 static int
 264 dri2WaitForSBC(__GLXDRIdrawable *pdraw, int64_t target_sbc, int64_t *ust,
 265                int64_t *msc, int64_t *sbc)
 266 {
 267    return DRI2WaitSBC(pdraw->psc->dpy, pdraw->xDrawable, target_sbc, ust, msc,
 268                       sbc);
 269 }
 270
 271 #endif /* X_DRI2WaitMSC */
 272
 273 static void
 274 dri2CopySubBuffer(__GLXDRIdrawable *pdraw, int x, int y, int width, int height)
 275 {
 276    __GLXDRIdrawablePrivate *priv = (__GLXDRIdrawablePrivate *) pdraw;
 277    XRectangle xrect;
 278    XserverRegion region;
 279
 280    /* Check we have the right attachments */
 281    if (!priv->have_back)
 282       return;
 283
 284    xrect.x = x;
 285    xrect.y = priv->height - y - height;
 286    xrect.width = width;
 287    xrect.height = height;
 288
 289 #ifdef __DRI2_FLUSH
 290    if (pdraw->psc->f)
 291       (*pdraw->psc->f->flush) (pdraw->driDrawable);
 292 #endif
 293
 294    region = XFixesCreateRegion(pdraw->psc->dpy, &xrect, 1);
 295    /* should get a fence ID back from here at some point */
 296    DRI2CopyRegion(pdraw->psc->dpy, pdraw->xDrawable, region,
 297                   DRI2BufferFrontLeft, DRI2BufferBackLeft);
 298    XFixesDestroyRegion(pdraw->psc->dpy, region);
 299
 300    /* Refresh the fake front (if present) after we just damaged the real
 301     * front.
 302     */
 303    dri2WaitX(pdraw);
 304 }
 305
 306 static void
 307 dri2WaitX(__GLXDRIdrawable *pdraw)
 308 {
 309    __GLXDRIdrawablePrivate *priv = (__GLXDRIdrawablePrivate *) pdraw;
 310    XRectangle xrect;
 311    XserverRegion region;
 312
 313    /* Check we have the right attachments */
 314    if (!priv->have_fake_front)
 315       return;
 316
 317    xrect.x = 0;
 318    xrect.y = 0;
 319    xrect.width = priv->width;
 320    xrect.height = priv->height;
 321
 322 #ifdef __DRI2_FLUSH
 323    if (pdraw->psc->f)
 324       (*pdraw->psc->f->flush) (pdraw->driDrawable);
 325 #endif
 326
 327    region = XFixesCreateRegion(pdraw->psc->dpy, &xrect, 1);
 328    DRI2CopyRegion(pdraw->psc->dpy, pdraw->xDrawable, region,
 329                   DRI2BufferFakeFrontLeft, DRI2BufferFrontLeft);
 330    XFixesDestroyRegion(pdraw->psc->dpy, region);
 331 }
 332
 333 static void
 334 dri2WaitGL(__GLXDRIdrawable * pdraw)
 335 {
 336    __GLXDRIdrawablePrivate *priv = (__GLXDRIdrawablePrivate *) pdraw;
 337    XRectangle xrect;
 338    XserverRegion region;
 339
 340    if (!priv->have_fake_front)
 341       return;
 342
 343    xrect.x = 0;
 344    xrect.y = 0;
 345    xrect.width = priv->width;
 346    xrect.height = priv->height;
 347
 348 #ifdef __DRI2_FLUSH
 349    if (pdraw->psc->f)
 350       (*pdraw->psc->f->flush) (pdraw->driDrawable);
 351 #endif
 352
 353    region = XFixesCreateRegion(pdraw->psc->dpy, &xrect, 1);
 354    DRI2CopyRegion(pdraw->psc->dpy, pdraw->xDrawable, region,
 355                   DRI2BufferFrontLeft, DRI2BufferFakeFrontLeft);
 356    XFixesDestroyRegion(pdraw->psc->dpy, region);
 357 }
 358
 359 static void
 360 dri2FlushFrontBuffer(__DRIdrawable *driDrawable, void *loaderPrivate)
 361 {
 362    __GLXDRIdrawablePrivate *pdraw = loaderPrivate;
 363    __GLXdisplayPrivate *priv = __glXInitialize(pdraw->base.psc->dpy);
 364    __GLXDRIdisplayPrivate *pdp = (__GLXDRIdisplayPrivate *)priv->dri2Display;
 365
 366    /* Old servers don't send invalidate events */
 367    if (!pdp->invalidateAvailable)
 368        dri2InvalidateBuffers(priv->dpy, pdraw->base.drawable);
 369
 370    dri2WaitGL(loaderPrivate);
 371 }
 372
 373
 374 static void
 375 dri2DestroyScreen(__GLXscreenConfigs * psc)
 376 {
 377    /* Free the direct rendering per screen data */
 378    (*psc->core->destroyScreen) (psc->__driScreen);
 379    close(psc->fd);
 380    psc->__driScreen = NULL;
 381 }
 382
 383 /**
 384  * Process list of buffer received from the server
 385  *
 386  * Processes the list of buffers received in a reply from the server to either
 387  * \c DRI2GetBuffers or \c DRI2GetBuffersWithFormat.
 388  */
 389 static void
 390 process_buffers(__GLXDRIdrawablePrivate * pdraw, DRI2Buffer * buffers,
 391                 unsigned count)
 392 {
 393    int i;
 394
 395    pdraw->bufferCount = count;
 396    pdraw->have_fake_front = 0;
 397    pdraw->have_back = 0;
 398
 399    /* This assumes the DRI2 buffer attachment tokens matches the
 400     * __DRIbuffer tokens. */
 401    for (i = 0; i < count; i++) {
 402       pdraw->buffers[i].attachment = buffers[i].attachment;
 403       pdraw->buffers[i].name = buffers[i].name;
 404       pdraw->buffers[i].pitch = buffers[i].pitch;
 405       pdraw->buffers[i].cpp = buffers[i].cpp;
 406       pdraw->buffers[i].flags = buffers[i].flags;
 407       if (pdraw->buffers[i].attachment == __DRI_BUFFER_FAKE_FRONT_LEFT)
 408          pdraw->have_fake_front = 1;
 409       if (pdraw->buffers[i].attachment == __DRI_BUFFER_BACK_LEFT)
 410          pdraw->have_back = 1;
 411    }
 412
 413 }
 414
 415 static int64_t
 416 dri2SwapBuffers(__GLXDRIdrawable *pdraw, int64_t target_msc, int64_t divisor,
 417                 int64_t remainder)
 418 {
 419     __GLXDRIdrawablePrivate *priv = (__GLXDRIdrawablePrivate *) pdraw;
 420     __GLXdisplayPrivate *dpyPriv = __glXInitialize(priv->base.psc->dpy);
 421     __GLXDRIdisplayPrivate *pdp =
 422         (__GLXDRIdisplayPrivate *)dpyPriv->dri2Display;
 423     int64_t ret;
 424
 425 #ifdef __DRI2_FLUSH
 426     if (pdraw->psc->f)
 427         (*pdraw->psc->f->flush)(pdraw->driDrawable);
 428 #endif
 429
 430     /* Old servers don't send invalidate events */
 431     if (!pdp->invalidateAvailable)
 432        dri2InvalidateBuffers(dpyPriv->dpy, pdraw->drawable);
 433
 434     /* Old servers can't handle swapbuffers */
 435     if (!pdp->swapAvailable) {
 436        dri2CopySubBuffer(pdraw, 0, 0, priv->width, priv->height);
 437        return 0;
 438     }
 439
 440 #ifdef X_DRI2SwapBuffers
 441     DRI2SwapBuffers(pdraw->psc->dpy, pdraw->xDrawable, target_msc, divisor,
 442                     remainder, &ret);
 443 #endif
 444
 445     return ret;
 446 }
 447
 448 static __DRIbuffer *
 449 dri2GetBuffers(__DRIdrawable * driDrawable,
 450                int *width, int *height,
 451                unsigned int *attachments, int count,
 452                int *out_count, void *loaderPrivate)
 453 {
 454    __GLXDRIdrawablePrivate *pdraw = loaderPrivate;
 455    DRI2Buffer *buffers;
 456
 457    buffers = DRI2GetBuffers(pdraw->base.psc->dpy, pdraw->base.xDrawable,
 458                             width, height, attachments, count, out_count);
 459    if (buffers == NULL)
 460       return NULL;
 461
 462    pdraw->width = *width;
 463    pdraw->height = *height;
 464    process_buffers(pdraw, buffers, *out_count);
 465
 466    Xfree(buffers);
 467
 468    return pdraw->buffers;
 469 }
 470
 471 static __DRIbuffer *
 472 dri2GetBuffersWithFormat(__DRIdrawable * driDrawable,
 473                          int *width, int *height,
 474                          unsigned int *attachments, int count,
 475                          int *out_count, void *loaderPrivate)
 476 {
 477    __GLXDRIdrawablePrivate *pdraw = loaderPrivate;
 478    DRI2Buffer *buffers;
 479
 480    buffers = DRI2GetBuffersWithFormat(pdraw->base.psc->dpy,
 481                                       pdraw->base.xDrawable,
 482                                       width, height, attachments,
 483                                       count, out_count);
 484    if (buffers == NULL)
 485       return NULL;
 486
 487    pdraw->width = *width;
 488    pdraw->height = *height;
 489    process_buffers(pdraw, buffers, *out_count);
 490
 491    Xfree(buffers);
 492
 493    return pdraw->buffers;
 494 }
 495
 496 #ifdef X_DRI2SwapInterval
 497
 498 static void
 499 dri2SetSwapInterval(__GLXDRIdrawable *pdraw, int interval)
 500 {
 501    __GLXscreenConfigs *psc = pdraw->psc;
 502    __GLXDRIdrawablePrivate *priv =  (__GLXDRIdrawablePrivate *) pdraw;
 503    GLint vblank_mode = DRI_CONF_VBLANK_DEF_INTERVAL_1;
 504
 505    if (psc->config)
 506       psc->config->configQueryi(psc->__driScreen, "vblank_mode", &vblank_mode);
 507
 508    switch (vblank_mode) {
 509    case DRI_CONF_VBLANK_NEVER:
 510       return;
 511    case DRI_CONF_VBLANK_ALWAYS_SYNC:
 512       if (interval <= 0)
 513          return;
 514       break;
 515    default:
 516       break;
 517    }
 518
 519    DRI2SwapInterval(priv->base.psc->dpy, pdraw->xDrawable, interval);
 520    priv->swap_interval = interval;
 521 }
 522
 523 static unsigned int
 524 dri2GetSwapInterval(__GLXDRIdrawable *pdraw)
 525 {
 526    __GLXDRIdrawablePrivate *priv =  (__GLXDRIdrawablePrivate *) pdraw;
 527
 528   return priv->swap_interval;
 529 }
 530
 531 #endif /* X_DRI2SwapInterval */
 532
 533 static const __DRIdri2LoaderExtension dri2LoaderExtension = {
 534    {__DRI_DRI2_LOADER, __DRI_DRI2_LOADER_VERSION},
 535    dri2GetBuffers,
 536    dri2FlushFrontBuffer,
 537    dri2GetBuffersWithFormat,
 538 };
 539
 540 static const __DRIdri2LoaderExtension dri2LoaderExtension_old = {
 541    {__DRI_DRI2_LOADER, __DRI_DRI2_LOADER_VERSION},
 542    dri2GetBuffers,
 543    dri2FlushFrontBuffer,
 544    NULL,
 545 };
 546
 547 static const __DRIextension *loader_extensions[] = {
 548    &dri2LoaderExtension.base,
 549    &systemTimeExtension.base,
 550    NULL
 551 };
 552
 553 static const __DRIextension *loader_extensions_old[] = {
 554    &dri2LoaderExtension_old.base,
 555    &systemTimeExtension.base,
 556    NULL
 557 };
 558
 559 _X_HIDDEN void
 560 dri2InvalidateBuffers(Display *dpy, XID drawable)
 561 {
 562    __GLXDRIdrawable *pdraw = GetGLXDRIDrawable(dpy, drawable, NULL);
 563
 564 #if __DRI2_FLUSH_VERSION >= 3
 565    if (pdraw && pdraw->psc->f)
 566        pdraw->psc->f->invalidate(pdraw->driDrawable);
 567 #endif
 568 }
 569
 570 static __GLXDRIscreen *
 571 dri2CreateScreen(__GLXscreenConfigs * psc, int screen,
 572                  __GLXdisplayPrivate * priv)
 573 {
 574    const __DRIconfig **driver_configs;
 575    const __DRIextension **extensions;
 576    const __GLXDRIdisplayPrivate *const pdp = (__GLXDRIdisplayPrivate *)
 577       priv->dri2Display;
 578    __GLXDRIscreen *psp;
 579    char *driverName, *deviceName;
 580    drm_magic_t magic;
 581    int i;
 582
 583    psp = Xmalloc(sizeof *psp);
 584    if (psp == NULL)
 585       return NULL;
 586
 587    if (!DRI2Connect(psc->dpy, RootWindow(psc->dpy, screen),
 588                     &driverName, &deviceName)) {
 589       XFree(psp);
 590       return NULL;
 591    }
 592
 593    psc->driver = driOpenDriver(driverName);
 594    if (psc->driver == NULL) {
 595       ErrorMessageF("driver pointer missing\n");
 596       goto handle_error;
 597    }
 598
 599    extensions = dlsym(psc->driver, __DRI_DRIVER_EXTENSIONS);
 600    if (extensions == NULL) {
 601       ErrorMessageF("driver exports no extensions (%s)\n", dlerror());
 602       goto handle_error;
 603    }
 604
 605    for (i = 0; extensions[i]; i++) {
 606       if (strcmp(extensions[i]->name, __DRI_CORE) == 0)
 607          psc->core = (__DRIcoreExtension *) extensions[i];
 608       if (strcmp(extensions[i]->name, __DRI_DRI2) == 0)
 609          psc->dri2 = (__DRIdri2Extension *) extensions[i];
 610    }
 611
 612    if (psc->core == NULL || psc->dri2 == NULL) {
 613       ErrorMessageF("core dri or dri2 extension not found\n");
 614       goto handle_error;
 615    }
 616
 617    psc->fd = open(deviceName, O_RDWR);
 618    if (psc->fd < 0) {
 619       ErrorMessageF("failed to open drm device: %s\n", strerror(errno));
 620       goto handle_error;
 621    }
 622
 623    if (drmGetMagic(psc->fd, &magic)) {
 624       ErrorMessageF("failed to get magic\n");
 625       goto handle_error;
 626    }
 627
 628    if (!DRI2Authenticate(psc->dpy, RootWindow(psc->dpy, screen), magic)) {
 629       ErrorMessageF("failed to authenticate magic %d\n", magic);
 630       goto handle_error;
 631    }
 632
 633    /* If the server does not support the protocol for
 634     * DRI2GetBuffersWithFormat, don't supply that interface to the driver.
 635     */
 636    psc->__driScreen =
 637       psc->dri2->createNewScreen(screen, psc->fd, ((pdp->driMinor < 1)
 638                                                    ? loader_extensions_old
 639                                                    : loader_extensions),
 640                                  &driver_configs, psc);
 641
 642    if (psc->__driScreen == NULL) {
 643       ErrorMessageF("failed to create dri screen\n");
 644       goto handle_error;
 645    }
 646
 647    driBindCommonExtensions(psc);
 648    dri2BindExtensions(psc);
 649
 650    psc->configs = driConvertConfigs(psc->core, psc->configs, driver_configs);
 651    psc->visuals = driConvertConfigs(psc->core, psc->visuals, driver_configs);
 652
 653    psc->driver_configs = driver_configs;
 654
 655    psp->destroyScreen = dri2DestroyScreen;
 656    psp->createContext = dri2CreateContext;
 657    psp->createDrawable = dri2CreateDrawable;
 658    psp->swapBuffers = dri2SwapBuffers;
 659    psp->waitGL = dri2WaitGL;
 660    psp->waitX = dri2WaitX;
 661    psp->getDrawableMSC = NULL;
 662    psp->waitForMSC = NULL;
 663    psp->waitForSBC = NULL;
 664    psp->setSwapInterval = NULL;
 665    psp->getSwapInterval = NULL;
 666
 667    if (pdp->driMinor >= 2) {
 668 #ifdef X_DRI2GetMSC
 669       psp->getDrawableMSC = dri2DrawableGetMSC;
 670 #endif
 671 #ifdef X_DRI2WaitMSC
 672       psp->waitForMSC = dri2WaitForMSC;
 673       psp->waitForSBC = dri2WaitForSBC;
 674 #endif
 675 #ifdef X_DRI2SwapInterval
 676       psp->setSwapInterval = dri2SetSwapInterval;
 677       psp->getSwapInterval = dri2GetSwapInterval;
 678 #endif
 679 #if defined(X_DRI2GetMSC) && defined(X_DRI2WaitMSC) && defined(X_DRI2SwapInterval)
 680       __glXEnableDirectExtension(psc, "GLX_OML_sync_control");
 681 #endif
 682    }
 683
 684    /* DRI2 suports SubBuffer through DRI2CopyRegion, so it's always
 685     * available.*/
 686    psp->copySubBuffer = dri2CopySubBuffer;
 687    __glXEnableDirectExtension(psc, "GLX_MESA_copy_sub_buffer");
 688
 689    Xfree(driverName);
 690    Xfree(deviceName);
 691
 692    return psp;
 693
 694 handle_error:
 695    Xfree(driverName);
 696    Xfree(deviceName);
 697    XFree(psp);
 698
 699    /* FIXME: clean up here */
 700
 701    return NULL;
 702 }
 703
 704 /* Called from __glXFreeDisplayPrivate.
 705  */
 706 static void
 707 dri2DestroyDisplay(__GLXDRIdisplay * dpy)
 708 {
 709    Xfree(dpy);
 710 }
 711
 712 /*
 713  * Allocate, initialize and return a __DRIdisplayPrivate object.
 714  * This is called from __glXInitialize() when we are given a new
 715  * display pointer.
 716  */
 717 _X_HIDDEN __GLXDRIdisplay *
 718 dri2CreateDisplay(Display * dpy)
 719 {
 720    __GLXDRIdisplayPrivate *pdp;
 721    int eventBase, errorBase;
 722
 723    if (!DRI2QueryExtension(dpy, &eventBase, &errorBase))
 724       return NULL;
 725
 726    pdp = Xmalloc(sizeof *pdp);
 727    if (pdp == NULL)
 728       return NULL;
 729
 730    if (!DRI2QueryVersion(dpy, &pdp->driMajor, &pdp->driMinor)) {
 731       Xfree(pdp);
 732       return NULL;
 733    }
 734
 735    pdp->driPatch = 0;
 736    pdp->swapAvailable = (pdp->driMinor >= 2);
 737    pdp->invalidateAvailable = (pdp->driMinor >= 3);
 738
 739    pdp->base.destroyDisplay = dri2DestroyDisplay;
 740    pdp->base.createScreen = dri2CreateScreen;
 741
 742    return &pdp->base;
 743 }
 744
 745 #endif /* GLX_DIRECT_RENDERING */