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    const __DRIextension *loader_extensions[4];
  78 };
  79
  80 struct __GLXDRIcontextPrivateRec
  81 {
  82    __GLXDRIcontext base;
  83    __DRIcontext *driContext;
  84    __GLXscreenConfigs *psc;
  85 };
  86
  87 struct __GLXDRIdrawablePrivateRec
  88 {
  89    __GLXDRIdrawable base;
  90    __DRIbuffer buffers[5];
  91    int bufferCount;
  92    int width, height;
  93    int have_back;
  94    int have_fake_front;
  95    int swap_interval;
  96 };
  97
  98 static void dri2WaitX(__GLXDRIdrawable * pdraw);
  99
 100 static void
 101 dri2DestroyContext(__GLXDRIcontext * context,
 102                    __GLXscreenConfigs * psc, Display * dpy)
 103 {
 104    __GLXDRIcontextPrivate *pcp = (__GLXDRIcontextPrivate *) context;
 105    const __DRIcoreExtension *core = pcp->psc->core;
 106
 107    (*core->destroyContext) (pcp->driContext);
 108
 109    Xfree(pcp);
 110 }
 111
 112 static Bool
 113 dri2BindContext(__GLXDRIcontext * context,
 114                 __GLXDRIdrawable * draw, __GLXDRIdrawable * read)
 115 {
 116    __GLXDRIcontextPrivate *pcp = (__GLXDRIcontextPrivate *) context;
 117    const __DRIcoreExtension *core = pcp->psc->core;
 118
 119    return (*core->bindContext) (pcp->driContext,
 120                                 draw->driDrawable, read->driDrawable);
 121 }
 122
 123 static void
 124 dri2UnbindContext(__GLXDRIcontext * context)
 125 {
 126    __GLXDRIcontextPrivate *pcp = (__GLXDRIcontextPrivate *) context;
 127    const __DRIcoreExtension *core = pcp->psc->core;
 128
 129    (*core->unbindContext) (pcp->driContext);
 130 }
 131
 132 static __GLXDRIcontext *
 133 dri2CreateContext(__GLXscreenConfigs * psc,
 134                   const __GLcontextModes * mode,
 135                   GLXContext gc, GLXContext shareList, int renderType)
 136 {
 137    __GLXDRIcontextPrivate *pcp, *pcp_shared;
 138    __GLXDRIconfigPrivate *config = (__GLXDRIconfigPrivate *) mode;
 139    __DRIcontext *shared = NULL;
 140
 141    if (shareList) {
 142       pcp_shared = (__GLXDRIcontextPrivate *) shareList->driContext;
 143       shared = pcp_shared->driContext;
 144    }
 145
 146    pcp = Xmalloc(sizeof *pcp);
 147    if (pcp == NULL)
 148       return NULL;
 149
 150    pcp->psc = psc;
 151    pcp->driContext =
 152       (*psc->dri2->createNewContext) (psc->__driScreen,
 153                                       config->driConfig, shared, pcp);
 154    gc->__driContext = pcp->driContext;
 155
 156    if (pcp->driContext == NULL) {
 157       Xfree(pcp);
 158       return NULL;
 159    }
 160
 161    pcp->base.destroyContext = dri2DestroyContext;
 162    pcp->base.bindContext = dri2BindContext;
 163    pcp->base.unbindContext = dri2UnbindContext;
 164
 165    return &pcp->base;
 166 }
 167
 168 static void
 169 dri2DestroyDrawable(__GLXDRIdrawable * pdraw)
 170 {
 171    const __DRIcoreExtension *core = pdraw->psc->core;
 172
 173    (*core->destroyDrawable) (pdraw->driDrawable);
 174    DRI2DestroyDrawable(pdraw->psc->dpy, pdraw->xDrawable);
 175    Xfree(pdraw);
 176 }
 177
 178 static __GLXDRIdrawable *
 179 dri2CreateDrawable(__GLXscreenConfigs * psc,
 180                    XID xDrawable,
 181                    GLXDrawable drawable, const __GLcontextModes * modes)
 182 {
 183    __GLXDRIdrawablePrivate *pdraw;
 184    __GLXDRIconfigPrivate *config = (__GLXDRIconfigPrivate *) modes;
 185    __GLXdisplayPrivate *dpyPriv;
 186    __GLXDRIdisplayPrivate *pdp;
 187    GLint vblank_mode = DRI_CONF_VBLANK_DEF_INTERVAL_1;
 188
 189    pdraw = Xmalloc(sizeof(*pdraw));
 190    if (!pdraw)
 191       return NULL;
 192
 193    pdraw->base.destroyDrawable = dri2DestroyDrawable;
 194    pdraw->base.xDrawable = xDrawable;
 195    pdraw->base.drawable = drawable;
 196    pdraw->base.psc = psc;
 197    pdraw->bufferCount = 0;
 198    pdraw->swap_interval = 1; /* default may be overridden below */
 199    pdraw->have_back = 0;
 200
 201    if (psc->config)
 202       psc->config->configQueryi(psc->__driScreen, "vblank_mode", &vblank_mode);
 203
 204    switch (vblank_mode) {
 205    case DRI_CONF_VBLANK_NEVER:
 206    case DRI_CONF_VBLANK_DEF_INTERVAL_0:
 207       pdraw->swap_interval = 0;
 208       break;
 209    case DRI_CONF_VBLANK_DEF_INTERVAL_1:
 210    case DRI_CONF_VBLANK_ALWAYS_SYNC:
 211    default:
 212       pdraw->swap_interval = 1;
 213       break;
 214    }
 215
 216    DRI2CreateDrawable(psc->dpy, xDrawable);
 217
 218    dpyPriv = __glXInitialize(psc->dpy);
 219    pdp = (__GLXDRIdisplayPrivate *)dpyPriv->dri2Display;;
 220    /* Create a new drawable */
 221    pdraw->base.driDrawable =
 222       (*psc->dri2->createNewDrawable) (psc->__driScreen,
 223                                        config->driConfig, pdraw);
 224
 225    if (!pdraw->base.driDrawable) {
 226       DRI2DestroyDrawable(psc->dpy, xDrawable);
 227       Xfree(pdraw);
 228       return NULL;
 229    }
 230
 231 #ifdef X_DRI2SwapInterval
 232    /*
 233     * Make sure server has the same swap interval we do for the new
 234     * drawable.
 235     */
 236    if (pdp->swapAvailable)
 237       DRI2SwapInterval(psc->dpy, xDrawable, pdraw->swap_interval);
 238 #endif
 239
 240    return &pdraw->base;
 241 }
 242
 243 #ifdef X_DRI2GetMSC
 244
 245 static int
 246 dri2DrawableGetMSC(__GLXscreenConfigs *psc, __GLXDRIdrawable *pdraw,
 247                    int64_t *ust, int64_t *msc, int64_t *sbc)
 248 {
 249    return DRI2GetMSC(psc->dpy, pdraw->xDrawable, ust, msc, sbc);
 250 }
 251
 252 #endif
 253
 254
 255 #ifdef X_DRI2WaitMSC
 256
 257 static int
 258 dri2WaitForMSC(__GLXDRIdrawable *pdraw, int64_t target_msc, int64_t divisor,
 259                int64_t remainder, int64_t *ust, int64_t *msc, int64_t *sbc)
 260 {
 261    return DRI2WaitMSC(pdraw->psc->dpy, pdraw->xDrawable, target_msc, divisor,
 262                       remainder, ust, msc, sbc);
 263 }
 264
 265 static int
 266 dri2WaitForSBC(__GLXDRIdrawable *pdraw, int64_t target_sbc, int64_t *ust,
 267                int64_t *msc, int64_t *sbc)
 268 {
 269    return DRI2WaitSBC(pdraw->psc->dpy, pdraw->xDrawable, target_sbc, ust, msc,
 270                       sbc);
 271 }
 272
 273 #endif /* X_DRI2WaitMSC */
 274
 275 static void
 276 dri2CopySubBuffer(__GLXDRIdrawable *pdraw, int x, int y, int width, int height)
 277 {
 278    __GLXDRIdrawablePrivate *priv = (__GLXDRIdrawablePrivate *) pdraw;
 279    XRectangle xrect;
 280    XserverRegion region;
 281
 282    /* Check we have the right attachments */
 283    if (!priv->have_back)
 284       return;
 285
 286    xrect.x = x;
 287    xrect.y = priv->height - y - height;
 288    xrect.width = width;
 289    xrect.height = height;
 290
 291 #ifdef __DRI2_FLUSH
 292    if (pdraw->psc->f)
 293       (*pdraw->psc->f->flush) (pdraw->driDrawable);
 294 #endif
 295
 296    region = XFixesCreateRegion(pdraw->psc->dpy, &xrect, 1);
 297    /* should get a fence ID back from here at some point */
 298    DRI2CopyRegion(pdraw->psc->dpy, pdraw->xDrawable, region,
 299                   DRI2BufferFrontLeft, DRI2BufferBackLeft);
 300    XFixesDestroyRegion(pdraw->psc->dpy, region);
 301
 302    /* Refresh the fake front (if present) after we just damaged the real
 303     * front.
 304     */
 305    dri2WaitX(pdraw);
 306 }
 307
 308 static void
 309 dri2WaitX(__GLXDRIdrawable *pdraw)
 310 {
 311    __GLXDRIdrawablePrivate *priv = (__GLXDRIdrawablePrivate *) pdraw;
 312    XRectangle xrect;
 313    XserverRegion region;
 314
 315    /* Check we have the right attachments */
 316    if (!priv->have_fake_front)
 317       return;
 318
 319    xrect.x = 0;
 320    xrect.y = 0;
 321    xrect.width = priv->width;
 322    xrect.height = priv->height;
 323
 324 #ifdef __DRI2_FLUSH
 325    if (pdraw->psc->f)
 326       (*pdraw->psc->f->flush) (pdraw->driDrawable);
 327 #endif
 328
 329    region = XFixesCreateRegion(pdraw->psc->dpy, &xrect, 1);
 330    DRI2CopyRegion(pdraw->psc->dpy, pdraw->xDrawable, region,
 331                   DRI2BufferFakeFrontLeft, DRI2BufferFrontLeft);
 332    XFixesDestroyRegion(pdraw->psc->dpy, region);
 333 }
 334
 335 static void
 336 dri2WaitGL(__GLXDRIdrawable * pdraw)
 337 {
 338    __GLXDRIdrawablePrivate *priv = (__GLXDRIdrawablePrivate *) pdraw;
 339    XRectangle xrect;
 340    XserverRegion region;
 341
 342    if (!priv->have_fake_front)
 343       return;
 344
 345    xrect.x = 0;
 346    xrect.y = 0;
 347    xrect.width = priv->width;
 348    xrect.height = priv->height;
 349
 350 #ifdef __DRI2_FLUSH
 351    if (pdraw->psc->f)
 352       (*pdraw->psc->f->flush) (pdraw->driDrawable);
 353 #endif
 354
 355    region = XFixesCreateRegion(pdraw->psc->dpy, &xrect, 1);
 356    DRI2CopyRegion(pdraw->psc->dpy, pdraw->xDrawable, region,
 357                   DRI2BufferFrontLeft, DRI2BufferFakeFrontLeft);
 358    XFixesDestroyRegion(pdraw->psc->dpy, region);
 359 }
 360
 361 static void
 362 dri2FlushFrontBuffer(__DRIdrawable *driDrawable, void *loaderPrivate)
 363 {
 364    __GLXDRIdrawablePrivate *pdraw = loaderPrivate;
 365    __GLXdisplayPrivate *priv = __glXInitialize(pdraw->base.psc->dpy);
 366    __GLXDRIdisplayPrivate *pdp = (__GLXDRIdisplayPrivate *)priv->dri2Display;
 367
 368    /* Old servers don't send invalidate events */
 369    if (!pdp->invalidateAvailable)
 370        dri2InvalidateBuffers(priv->dpy, pdraw->base.drawable);
 371
 372    dri2WaitGL(loaderPrivate);
 373 }
 374
 375
 376 static void
 377 dri2DestroyScreen(__GLXscreenConfigs * psc)
 378 {
 379    /* Free the direct rendering per screen data */
 380    (*psc->core->destroyScreen) (psc->__driScreen);
 381    close(psc->fd);
 382    psc->__driScreen = NULL;
 383 }
 384
 385 /**
 386  * Process list of buffer received from the server
 387  *
 388  * Processes the list of buffers received in a reply from the server to either
 389  * \c DRI2GetBuffers or \c DRI2GetBuffersWithFormat.
 390  */
 391 static void
 392 process_buffers(__GLXDRIdrawablePrivate * pdraw, DRI2Buffer * buffers,
 393                 unsigned count)
 394 {
 395    int i;
 396
 397    pdraw->bufferCount = count;
 398    pdraw->have_fake_front = 0;
 399    pdraw->have_back = 0;
 400
 401    /* This assumes the DRI2 buffer attachment tokens matches the
 402     * __DRIbuffer tokens. */
 403    for (i = 0; i < count; i++) {
 404       pdraw->buffers[i].attachment = buffers[i].attachment;
 405       pdraw->buffers[i].name = buffers[i].name;
 406       pdraw->buffers[i].pitch = buffers[i].pitch;
 407       pdraw->buffers[i].cpp = buffers[i].cpp;
 408       pdraw->buffers[i].flags = buffers[i].flags;
 409       if (pdraw->buffers[i].attachment == __DRI_BUFFER_FAKE_FRONT_LEFT)
 410          pdraw->have_fake_front = 1;
 411       if (pdraw->buffers[i].attachment == __DRI_BUFFER_BACK_LEFT)
 412          pdraw->have_back = 1;
 413    }
 414
 415 }
 416
 417 static int64_t
 418 dri2SwapBuffers(__GLXDRIdrawable *pdraw, int64_t target_msc, int64_t divisor,
 419                 int64_t remainder)
 420 {
 421     __GLXDRIdrawablePrivate *priv = (__GLXDRIdrawablePrivate *) pdraw;
 422     __GLXdisplayPrivate *dpyPriv = __glXInitialize(priv->base.psc->dpy);
 423     __GLXDRIdisplayPrivate *pdp =
 424         (__GLXDRIdisplayPrivate *)dpyPriv->dri2Display;
 425     int64_t ret;
 426
 427 #ifdef __DRI2_FLUSH
 428     if (pdraw->psc->f)
 429         (*pdraw->psc->f->flush)(pdraw->driDrawable);
 430 #endif
 431
 432     /* Old servers don't send invalidate events */
 433     if (!pdp->invalidateAvailable)
 434        dri2InvalidateBuffers(dpyPriv->dpy, pdraw->drawable);
 435
 436     /* Old servers can't handle swapbuffers */
 437     if (!pdp->swapAvailable) {
 438        dri2CopySubBuffer(pdraw, 0, 0, priv->width, priv->height);
 439        return 0;
 440     }
 441
 442 #ifdef X_DRI2SwapBuffers
 443     DRI2SwapBuffers(pdraw->psc->dpy, pdraw->xDrawable, target_msc, divisor,
 444                     remainder, &ret);
 445 #endif
 446
 447     return ret;
 448 }
 449
 450 static __DRIbuffer *
 451 dri2GetBuffers(__DRIdrawable * driDrawable,
 452                int *width, int *height,
 453                unsigned int *attachments, int count,
 454                int *out_count, void *loaderPrivate)
 455 {
 456    __GLXDRIdrawablePrivate *pdraw = loaderPrivate;
 457    DRI2Buffer *buffers;
 458
 459    buffers = DRI2GetBuffers(pdraw->base.psc->dpy, pdraw->base.xDrawable,
 460                             width, height, attachments, count, out_count);
 461    if (buffers == NULL)
 462       return NULL;
 463
 464    pdraw->width = *width;
 465    pdraw->height = *height;
 466    process_buffers(pdraw, buffers, *out_count);
 467
 468    Xfree(buffers);
 469
 470    return pdraw->buffers;
 471 }
 472
 473 static __DRIbuffer *
 474 dri2GetBuffersWithFormat(__DRIdrawable * driDrawable,
 475                          int *width, int *height,
 476                          unsigned int *attachments, int count,
 477                          int *out_count, void *loaderPrivate)
 478 {
 479    __GLXDRIdrawablePrivate *pdraw = loaderPrivate;
 480    DRI2Buffer *buffers;
 481
 482    buffers = DRI2GetBuffersWithFormat(pdraw->base.psc->dpy,
 483                                       pdraw->base.xDrawable,
 484                                       width, height, attachments,
 485                                       count, out_count);
 486    if (buffers == NULL)
 487       return NULL;
 488
 489    pdraw->width = *width;
 490    pdraw->height = *height;
 491    process_buffers(pdraw, buffers, *out_count);
 492
 493    Xfree(buffers);
 494
 495    return pdraw->buffers;
 496 }
 497
 498 #ifdef X_DRI2SwapInterval
 499
 500 static void
 501 dri2SetSwapInterval(__GLXDRIdrawable *pdraw, int interval)
 502 {
 503    __GLXscreenConfigs *psc = pdraw->psc;
 504    __GLXDRIdrawablePrivate *priv =  (__GLXDRIdrawablePrivate *) pdraw;
 505    GLint vblank_mode = DRI_CONF_VBLANK_DEF_INTERVAL_1;
 506
 507    if (psc->config)
 508       psc->config->configQueryi(psc->__driScreen, "vblank_mode", &vblank_mode);
 509
 510    switch (vblank_mode) {
 511    case DRI_CONF_VBLANK_NEVER:
 512       return;
 513    case DRI_CONF_VBLANK_ALWAYS_SYNC:
 514       if (interval <= 0)
 515          return;
 516       break;
 517    default:
 518       break;
 519    }
 520
 521    DRI2SwapInterval(priv->base.psc->dpy, pdraw->xDrawable, interval);
 522    priv->swap_interval = interval;
 523 }
 524
 525 static unsigned int
 526 dri2GetSwapInterval(__GLXDRIdrawable *pdraw)
 527 {
 528    __GLXDRIdrawablePrivate *priv =  (__GLXDRIdrawablePrivate *) pdraw;
 529
 530   return priv->swap_interval;
 531 }
 532
 533 #endif /* X_DRI2SwapInterval */
 534
 535 static const __DRIdri2LoaderExtension dri2LoaderExtension = {
 536    {__DRI_DRI2_LOADER, __DRI_DRI2_LOADER_VERSION},
 537    dri2GetBuffers,
 538    dri2FlushFrontBuffer,
 539    dri2GetBuffersWithFormat,
 540 };
 541
 542 static const __DRIdri2LoaderExtension dri2LoaderExtension_old = {
 543    {__DRI_DRI2_LOADER, __DRI_DRI2_LOADER_VERSION},
 544    dri2GetBuffers,
 545    dri2FlushFrontBuffer,
 546    NULL,
 547 };
 548
 549 #ifdef __DRI_USE_INVALIDATE
 550 static const __DRIuseInvalidateExtension dri2UseInvalidate = {
 551    { __DRI_USE_INVALIDATE, __DRI_USE_INVALIDATE_VERSION }
 552 };
 553 #endif
 554
 555 _X_HIDDEN void
 556 dri2InvalidateBuffers(Display *dpy, XID drawable)
 557 {
 558    __GLXDRIdrawable *pdraw = GetGLXDRIDrawable(dpy, drawable, NULL);
 559
 560 #if __DRI2_FLUSH_VERSION >= 3
 561    if (pdraw && pdraw->psc->f)
 562        pdraw->psc->f->invalidate(pdraw->driDrawable);
 563 #endif
 564 }
 565
 566 static void
 567 dri2_bind_tex_image(Display * dpy,
 568                     GLXDrawable drawable,
 569                     int buffer, const int *attrib_list)
 570 {
 571    GLXContext gc = __glXGetCurrentContext();
 572    __GLXDRIdrawable *pdraw = GetGLXDRIDrawable(dpy, drawable, NULL);
 573     __GLXdisplayPrivate *dpyPriv = __glXInitialize(dpy);
 574     __GLXDRIdisplayPrivate *pdp =
 575         (__GLXDRIdisplayPrivate *) dpyPriv->dri2Display;
 576
 577    if (pdraw != NULL) {
 578
 579 #if __DRI2_FLUSH_VERSION >= 3
 580       if (!pdp->invalidateAvailable && pdraw->psc->f)
 581          pdraw->psc->f->invalidate(pdraw->driDrawable);
 582 #endif
 583
 584       if (pdraw->psc->texBuffer->base.version >= 2 &&
 585           pdraw->psc->texBuffer->setTexBuffer2 != NULL) {
 586          (*pdraw->psc->texBuffer->setTexBuffer2) (gc->__driContext,
 587                                                   pdraw->textureTarget,
 588                                                   pdraw->textureFormat,
 589                                                   pdraw->driDrawable);
 590       }
 591       else {
 592          (*pdraw->psc->texBuffer->setTexBuffer) (gc->__driContext,
 593                                                  pdraw->textureTarget,
 594                                                  pdraw->driDrawable);
 595       }
 596    }
 597 }
 598
 599 static void
 600 dri2_release_tex_image(Display * dpy, GLXDrawable drawable, int buffer)
 601 {
 602 }
 603
 604 static const struct glx_context_vtable dri2_context_vtable = {
 605    dri2_bind_tex_image,
 606    dri2_release_tex_image,
 607 };
 608
 609 static __GLXDRIscreen *
 610 dri2CreateScreen(__GLXscreenConfigs * psc, int screen,
 611                  __GLXdisplayPrivate * priv)
 612 {
 613    const __DRIconfig **driver_configs;
 614    const __DRIextension **extensions;
 615    const __GLXDRIdisplayPrivate *const pdp = (__GLXDRIdisplayPrivate *)
 616       priv->dri2Display;
 617    __GLXDRIscreen *psp;
 618    char *driverName, *deviceName;
 619    drm_magic_t magic;
 620    int i;
 621
 622    psp = Xmalloc(sizeof *psp);
 623    if (psp == NULL)
 624       return NULL;
 625
 626    if (!DRI2Connect(psc->dpy, RootWindow(psc->dpy, screen),
 627                     &driverName, &deviceName)) {
 628       XFree(psp);
 629       return NULL;
 630    }
 631
 632    psc->driver = driOpenDriver(driverName);
 633    if (psc->driver == NULL) {
 634       ErrorMessageF("driver pointer missing\n");
 635       goto handle_error;
 636    }
 637
 638    extensions = dlsym(psc->driver, __DRI_DRIVER_EXTENSIONS);
 639    if (extensions == NULL) {
 640       ErrorMessageF("driver exports no extensions (%s)\n", dlerror());
 641       goto handle_error;
 642    }
 643
 644    for (i = 0; extensions[i]; i++) {
 645       if (strcmp(extensions[i]->name, __DRI_CORE) == 0)
 646          psc->core = (__DRIcoreExtension *) extensions[i];
 647       if (strcmp(extensions[i]->name, __DRI_DRI2) == 0)
 648          psc->dri2 = (__DRIdri2Extension *) extensions[i];
 649    }
 650
 651    if (psc->core == NULL || psc->dri2 == NULL) {
 652       ErrorMessageF("core dri or dri2 extension not found\n");
 653       goto handle_error;
 654    }
 655
 656    psc->fd = open(deviceName, O_RDWR);
 657    if (psc->fd < 0) {
 658       ErrorMessageF("failed to open drm device: %s\n", strerror(errno));
 659       goto handle_error;
 660    }
 661
 662    if (drmGetMagic(psc->fd, &magic)) {
 663       ErrorMessageF("failed to get magic\n");
 664       goto handle_error;
 665    }
 666
 667    if (!DRI2Authenticate(psc->dpy, RootWindow(psc->dpy, screen), magic)) {
 668       ErrorMessageF("failed to authenticate magic %d\n", magic);
 669       goto handle_error;
 670    }
 671
 672
 673    /* If the server does not support the protocol for
 674     * DRI2GetBuffersWithFormat, don't supply that interface to the driver.
 675     */
 676    psc->__driScreen =
 677       psc->dri2->createNewScreen(screen, psc->fd,
 678                                  (const __DRIextension **)
 679                                  &pdp->loader_extensions[0],
 680                                  &driver_configs, psc);
 681
 682    if (psc->__driScreen == NULL) {
 683       ErrorMessageF("failed to create dri screen\n");
 684       goto handle_error;
 685    }
 686
 687    driBindCommonExtensions(psc);
 688    dri2BindExtensions(psc);
 689
 690    psc->configs = driConvertConfigs(psc->core, psc->configs, driver_configs);
 691    psc->visuals = driConvertConfigs(psc->core, psc->visuals, driver_configs);
 692
 693    psc->driver_configs = driver_configs;
 694
 695    psp->destroyScreen = dri2DestroyScreen;
 696    psp->createContext = dri2CreateContext;
 697    psp->createDrawable = dri2CreateDrawable;
 698    psp->swapBuffers = dri2SwapBuffers;
 699    psp->waitGL = dri2WaitGL;
 700    psp->waitX = dri2WaitX;
 701    psp->getDrawableMSC = NULL;
 702    psp->waitForMSC = NULL;
 703    psp->waitForSBC = NULL;
 704    psp->setSwapInterval = NULL;
 705    psp->getSwapInterval = NULL;
 706
 707    if (pdp->driMinor >= 2) {
 708 #ifdef X_DRI2GetMSC
 709       psp->getDrawableMSC = dri2DrawableGetMSC;
 710 #endif
 711 #ifdef X_DRI2WaitMSC
 712       psp->waitForMSC = dri2WaitForMSC;
 713       psp->waitForSBC = dri2WaitForSBC;
 714 #endif
 715 #ifdef X_DRI2SwapInterval
 716       psp->setSwapInterval = dri2SetSwapInterval;
 717       psp->getSwapInterval = dri2GetSwapInterval;
 718 #endif
 719 #if defined(X_DRI2GetMSC) && defined(X_DRI2WaitMSC) && defined(X_DRI2SwapInterval)
 720       __glXEnableDirectExtension(psc, "GLX_OML_sync_control");
 721 #endif
 722    }
 723
 724    /* DRI2 suports SubBuffer through DRI2CopyRegion, so it's always
 725     * available.*/
 726    psp->copySubBuffer = dri2CopySubBuffer;
 727    __glXEnableDirectExtension(psc, "GLX_MESA_copy_sub_buffer");
 728
 729    psc->direct_context_vtable = &dri2_context_vtable;
 730
 731    Xfree(driverName);
 732    Xfree(deviceName);
 733
 734    return psp;
 735
 736 handle_error:
 737    Xfree(driverName);
 738    Xfree(deviceName);
 739    XFree(psp);
 740
 741    /* FIXME: clean up here */
 742
 743    return NULL;
 744 }
 745
 746 /* Called from __glXFreeDisplayPrivate.
 747  */
 748 static void
 749 dri2DestroyDisplay(__GLXDRIdisplay * dpy)
 750 {
 751    Xfree(dpy);
 752 }
 753
 754 /*
 755  * Allocate, initialize and return a __DRIdisplayPrivate object.
 756  * This is called from __glXInitialize() when we are given a new
 757  * display pointer.
 758  */
 759 _X_HIDDEN __GLXDRIdisplay *
 760 dri2CreateDisplay(Display * dpy)
 761 {
 762    __GLXDRIdisplayPrivate *pdp;
 763    int eventBase, errorBase, i;
 764
 765    if (!DRI2QueryExtension(dpy, &eventBase, &errorBase))
 766       return NULL;
 767
 768    pdp = Xmalloc(sizeof *pdp);
 769    if (pdp == NULL)
 770       return NULL;
 771
 772    if (!DRI2QueryVersion(dpy, &pdp->driMajor, &pdp->driMinor)) {
 773       Xfree(pdp);
 774       return NULL;
 775    }
 776
 777    pdp->driPatch = 0;
 778    pdp->swapAvailable = (pdp->driMinor >= 2);
 779    pdp->invalidateAvailable = (pdp->driMinor >= 3);
 780
 781    pdp->base.destroyDisplay = dri2DestroyDisplay;
 782    pdp->base.createScreen = dri2CreateScreen;
 783
 784    i = 0;
 785    if (pdp->driMinor < 1)
 786       pdp->loader_extensions[i++] = &dri2LoaderExtension_old.base;
 787    else
 788       pdp->loader_extensions[i++] = &dri2LoaderExtension.base;
 789
 790    pdp->loader_extensions[i++] = &systemTimeExtension.base;
 791
 792 #ifdef __DRI_USE_INVALIDATE
 793    pdp->loader_extensions[i++] = &dri2UseInvalidate.base;
 794 #endif
 795    pdp->loader_extensions[i++] = NULL;
 796
 797    return &pdp->base;
 798 }
 799
 800 #endif /* GLX_DIRECT_RENDERING */