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