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 struct dri2_display
  61 {
  62    __GLXDRIdisplay base;
  63
  64    /*
  65     ** XFree86-DRI version information
  66     */
  67    int driMajor;
  68    int driMinor;
  69    int driPatch;
  70    int swapAvailable;
  71    int invalidateAvailable;
  72
  73    __glxHashTable *dri2Hash;
  74
  75    const __DRIextension *loader_extensions[4];
  76 };
  77
  78 struct dri2_screen {
  79    __GLXscreenConfigs base;
  80
  81    __DRIscreen *driScreen;
  82    __GLXDRIscreen vtable;
  83    const __DRIdri2Extension *dri2;
  84    const __DRIcoreExtension *core;
  85
  86    const __DRI2flushExtension *f;
  87    const __DRI2configQueryExtension *config;
  88    const __DRItexBufferExtension *texBuffer;
  89
  90    void *driver;
  91    int fd;
  92 };
  93
  94 struct dri2_context
  95 {
  96    __GLXDRIcontext base;
  97    __DRIcontext *driContext;
  98    __GLXscreenConfigs *psc;
  99 };
 100
 101 struct dri2_drawable
 102 {
 103    __GLXDRIdrawable base;
 104    __DRIdrawable *driDrawable;
 105    __DRIbuffer buffers[5];
 106    int bufferCount;
 107    int width, height;
 108    int have_back;
 109    int have_fake_front;
 110    int swap_interval;
 111 };
 112
 113 static void
 114 dri2DestroyContext(__GLXDRIcontext *context,
 115                    __GLXscreenConfigs *base, Display *dpy)
 116 {
 117    struct dri2_context *pcp = (struct dri2_context *) context;
 118    struct dri2_screen *psc = (struct dri2_screen *) base;
 119
 120    (*psc->core->destroyContext) (pcp->driContext);
 121
 122    Xfree(pcp);
 123 }
 124
 125 static Bool
 126 dri2BindContext(__GLXDRIcontext *context,
 127                 __GLXDRIdrawable *draw, __GLXDRIdrawable *read)
 128 {
 129    struct dri2_context *pcp = (struct dri2_context *) context;
 130    struct dri2_screen *psc = (struct dri2_screen *) pcp->psc;
 131    struct dri2_drawable *pdr = (struct dri2_drawable *) draw;
 132    struct dri2_drawable *prd = (struct dri2_drawable *) read;
 133
 134    return (*psc->core->bindContext) (pcp->driContext,
 135                                      pdr->driDrawable, prd->driDrawable);
 136 }
 137
 138 static void
 139 dri2UnbindContext(__GLXDRIcontext *context)
 140 {
 141    struct dri2_context *pcp = (struct dri2_context *) context;
 142    struct dri2_screen *psc = (struct dri2_screen *) pcp->psc;
 143
 144    (*psc->core->unbindContext) (pcp->driContext);
 145 }
 146
 147 static __GLXDRIcontext *
 148 dri2CreateContext(__GLXscreenConfigs *base,
 149                   const __GLcontextModes * mode,
 150                   GLXContext gc, GLXContext shareList, int renderType)
 151 {
 152    struct dri2_context *pcp, *pcp_shared;
 153    struct dri2_screen *psc = (struct dri2_screen *) base;
 154    __GLXDRIconfigPrivate *config = (__GLXDRIconfigPrivate *) mode;
 155    __DRIcontext *shared = NULL;
 156
 157    if (shareList) {
 158       pcp_shared = (struct dri2_context *) shareList->driContext;
 159       shared = pcp_shared->driContext;
 160    }
 161
 162    pcp = Xmalloc(sizeof *pcp);
 163    if (pcp == NULL)
 164       return NULL;
 165
 166    pcp->psc = &psc->base;
 167    pcp->driContext =
 168       (*psc->dri2->createNewContext) (psc->driScreen,
 169                                       config->driConfig, shared, pcp);
 170    gc->__driContext = pcp->driContext;
 171
 172    if (pcp->driContext == NULL) {
 173       Xfree(pcp);
 174       return NULL;
 175    }
 176
 177    pcp->base.destroyContext = dri2DestroyContext;
 178    pcp->base.bindContext = dri2BindContext;
 179    pcp->base.unbindContext = dri2UnbindContext;
 180
 181    return &pcp->base;
 182 }
 183
 184 static void
 185 dri2DestroyDrawable(__GLXDRIdrawable *base)
 186 {
 187    struct dri2_screen *psc = (struct dri2_screen *) base->psc;
 188    struct dri2_drawable *pdraw = (struct dri2_drawable *) base;
 189    __GLXdisplayPrivate *dpyPriv;
 190    struct dri2_display *pdp;
 191
 192    dpyPriv = __glXInitialize(base->psc->dpy);
 193    pdp = (struct dri2_display *)dpyPriv->dri2Display;
 194
 195    __glxHashDelete(pdp->dri2Hash, pdraw->base.xDrawable);
 196    (*psc->core->destroyDrawable) (pdraw->driDrawable);
 197    DRI2DestroyDrawable(psc->base.dpy, pdraw->base.xDrawable);
 198    Xfree(pdraw);
 199 }
 200
 201 static __GLXDRIdrawable *
 202 dri2CreateDrawable(__GLXscreenConfigs *base, XID xDrawable,
 203                    GLXDrawable drawable, const __GLcontextModes * modes)
 204 {
 205    struct dri2_drawable *pdraw;
 206    struct dri2_screen *psc = (struct dri2_screen *) base;
 207    __GLXDRIconfigPrivate *config = (__GLXDRIconfigPrivate *) modes;
 208    __GLXdisplayPrivate *dpyPriv;
 209    struct dri2_display *pdp;
 210    GLint vblank_mode = DRI_CONF_VBLANK_DEF_INTERVAL_1;
 211
 212    pdraw = Xmalloc(sizeof(*pdraw));
 213    if (!pdraw)
 214       return NULL;
 215
 216    pdraw->base.destroyDrawable = dri2DestroyDrawable;
 217    pdraw->base.xDrawable = xDrawable;
 218    pdraw->base.drawable = drawable;
 219    pdraw->base.psc = &psc->base;
 220    pdraw->bufferCount = 0;
 221    pdraw->swap_interval = 1; /* default may be overridden below */
 222    pdraw->have_back = 0;
 223
 224    if (psc->config)
 225       psc->config->configQueryi(psc->driScreen,
 226                                 "vblank_mode", &vblank_mode);
 227
 228    switch (vblank_mode) {
 229    case DRI_CONF_VBLANK_NEVER:
 230    case DRI_CONF_VBLANK_DEF_INTERVAL_0:
 231       pdraw->swap_interval = 0;
 232       break;
 233    case DRI_CONF_VBLANK_DEF_INTERVAL_1:
 234    case DRI_CONF_VBLANK_ALWAYS_SYNC:
 235    default:
 236       pdraw->swap_interval = 1;
 237       break;
 238    }
 239
 240    DRI2CreateDrawable(psc->base.dpy, xDrawable);
 241
 242    dpyPriv = __glXInitialize(psc->base.dpy);
 243    pdp = (struct dri2_display *)dpyPriv->dri2Display;;
 244    /* Create a new drawable */
 245    pdraw->driDrawable =
 246       (*psc->dri2->createNewDrawable) (psc->driScreen,
 247                                        config->driConfig, pdraw);
 248
 249    if (!pdraw->driDrawable) {
 250       DRI2DestroyDrawable(psc->base.dpy, xDrawable);
 251       Xfree(pdraw);
 252       return NULL;
 253    }
 254
 255    if (__glxHashInsert(pdp->dri2Hash, xDrawable, pdraw)) {
 256       (*psc->core->destroyDrawable) (pdraw->driDrawable);
 257       DRI2DestroyDrawable(psc->base.dpy, xDrawable);
 258       Xfree(pdraw);
 259       return None;
 260    }
 261
 262
 263 #ifdef X_DRI2SwapInterval
 264    /*
 265     * Make sure server has the same swap interval we do for the new
 266     * drawable.
 267     */
 268    if (pdp->swapAvailable)
 269       DRI2SwapInterval(psc->base.dpy, xDrawable, pdraw->swap_interval);
 270 #endif
 271
 272    return &pdraw->base;
 273 }
 274
 275 #ifdef X_DRI2GetMSC
 276
 277 static int
 278 dri2DrawableGetMSC(__GLXscreenConfigs *psc, __GLXDRIdrawable *pdraw,
 279                    int64_t *ust, int64_t *msc, int64_t *sbc)
 280 {
 281    CARD64 dri2_ust, dri2_msc, dri2_sbc;
 282    int ret;
 283
 284    ret = DRI2GetMSC(psc->dpy, pdraw->xDrawable,
 285                     &dri2_ust, &dri2_msc, &dri2_sbc);
 286    *ust = dri2_ust;
 287    *msc = dri2_msc;
 288    *sbc = dri2_sbc;
 289
 290    return ret;
 291 }
 292
 293 #endif
 294
 295
 296 #ifdef X_DRI2WaitMSC
 297
 298 static int
 299 dri2WaitForMSC(__GLXDRIdrawable *pdraw, int64_t target_msc, int64_t divisor,
 300                int64_t remainder, int64_t *ust, int64_t *msc, int64_t *sbc)
 301 {
 302    CARD64 dri2_ust, dri2_msc, dri2_sbc;
 303    int ret;
 304
 305    ret = DRI2WaitMSC(pdraw->psc->dpy, pdraw->xDrawable, target_msc, divisor,
 306                      remainder, &dri2_ust, &dri2_msc, &dri2_sbc);
 307    *ust = dri2_ust;
 308    *msc = dri2_msc;
 309    *sbc = dri2_sbc;
 310
 311    return ret;
 312 }
 313
 314 static int
 315 dri2WaitForSBC(__GLXDRIdrawable *pdraw, int64_t target_sbc, int64_t *ust,
 316                int64_t *msc, int64_t *sbc)
 317 {
 318    CARD64 dri2_ust, dri2_msc, dri2_sbc;
 319    int ret;
 320
 321    ret = DRI2WaitSBC(pdraw->psc->dpy, pdraw->xDrawable,
 322                      target_sbc, &dri2_ust, &dri2_msc, &dri2_sbc);
 323    *ust = dri2_ust;
 324    *msc = dri2_msc;
 325    *sbc = dri2_sbc;
 326
 327    return ret;
 328 }
 329
 330 #endif /* X_DRI2WaitMSC */
 331
 332 static void
 333 dri2CopySubBuffer(__GLXDRIdrawable *pdraw, int x, int y, int width, int height)
 334 {
 335    struct dri2_drawable *priv = (struct dri2_drawable *) pdraw;
 336    struct dri2_screen *psc = (struct dri2_screen *) pdraw->psc;
 337    XRectangle xrect;
 338    XserverRegion region;
 339
 340    /* Check we have the right attachments */
 341    if (!priv->have_back)
 342       return;
 343
 344    xrect.x = x;
 345    xrect.y = priv->height - y - height;
 346    xrect.width = width;
 347    xrect.height = height;
 348
 349 #ifdef __DRI2_FLUSH
 350    if (psc->f)
 351       (*psc->f->flush) (priv->driDrawable);
 352 #endif
 353
 354    region = XFixesCreateRegion(psc->base.dpy, &xrect, 1);
 355    DRI2CopyRegion(psc->base.dpy, pdraw->xDrawable, region,
 356                   DRI2BufferFrontLeft, DRI2BufferBackLeft);
 357    XFixesDestroyRegion(psc->base.dpy, region);
 358
 359    /* Refresh the fake front (if present) after we just damaged the real
 360     * front.
 361     */
 362    DRI2CopyRegion(psc->base.dpy, pdraw->xDrawable, region,
 363                   DRI2BufferFakeFrontLeft, DRI2BufferFrontLeft);
 364    XFixesDestroyRegion(psc->base.dpy, region);
 365 }
 366
 367 static void
 368 dri2_copy_drawable(struct dri2_drawable *priv, int dest, int src)
 369 {
 370    XRectangle xrect;
 371    XserverRegion region;
 372    struct dri2_screen *psc = (struct dri2_screen *) priv->base.psc;
 373
 374    xrect.x = 0;
 375    xrect.y = 0;
 376    xrect.width = priv->width;
 377    xrect.height = priv->height;
 378
 379 #ifdef __DRI2_FLUSH
 380    if (psc->f)
 381       (*psc->f->flush) (priv->driDrawable);
 382 #endif
 383
 384    region = XFixesCreateRegion(psc->base.dpy, &xrect, 1);
 385    DRI2CopyRegion(psc->base.dpy, priv->base.xDrawable, region, dest, src);
 386    XFixesDestroyRegion(psc->base.dpy, region);
 387
 388 }
 389
 390 static void
 391 dri2WaitX(__GLXDRIdrawable *pdraw)
 392 {
 393    struct dri2_drawable *priv = (struct dri2_drawable *) pdraw;
 394
 395    if (!priv->have_fake_front)
 396       return;
 397
 398    dri2_copy_drawable(priv, DRI2BufferFakeFrontLeft, DRI2BufferFrontLeft);
 399 }
 400
 401 static void
 402 dri2WaitGL(__GLXDRIdrawable * pdraw)
 403 {
 404    struct dri2_drawable *priv = (struct dri2_drawable *) pdraw;
 405
 406    if (!priv->have_fake_front)
 407       return;
 408
 409    dri2_copy_drawable(priv, DRI2BufferFrontLeft, DRI2BufferFakeFrontLeft);
 410 }
 411
 412 static void
 413 dri2FlushFrontBuffer(__DRIdrawable *driDrawable, void *loaderPrivate)
 414 {
 415    struct dri2_drawable *pdraw = loaderPrivate;
 416    __GLXdisplayPrivate *priv = __glXInitialize(pdraw->base.psc->dpy);
 417    struct dri2_display *pdp = (struct dri2_display *)priv->dri2Display;
 418
 419    /* Old servers don't send invalidate events */
 420    if (!pdp->invalidateAvailable)
 421        dri2InvalidateBuffers(priv->dpy, pdraw->base.drawable);
 422
 423    dri2WaitGL(loaderPrivate);
 424 }
 425
 426
 427 static void
 428 dri2DestroyScreen(__GLXscreenConfigs *base)
 429 {
 430    struct dri2_screen *psc = (struct dri2_screen *) base;
 431
 432    /* Free the direct rendering per screen data */
 433    (*psc->core->destroyScreen) (psc->driScreen);
 434    close(psc->fd);
 435    Xfree(psc);
 436 }
 437
 438 /**
 439  * Process list of buffer received from the server
 440  *
 441  * Processes the list of buffers received in a reply from the server to either
 442  * \c DRI2GetBuffers or \c DRI2GetBuffersWithFormat.
 443  */
 444 static void
 445 process_buffers(struct dri2_drawable * pdraw, DRI2Buffer * buffers,
 446                 unsigned count)
 447 {
 448    int i;
 449
 450    pdraw->bufferCount = count;
 451    pdraw->have_fake_front = 0;
 452    pdraw->have_back = 0;
 453
 454    /* This assumes the DRI2 buffer attachment tokens matches the
 455     * __DRIbuffer tokens. */
 456    for (i = 0; i < count; i++) {
 457       pdraw->buffers[i].attachment = buffers[i].attachment;
 458       pdraw->buffers[i].name = buffers[i].name;
 459       pdraw->buffers[i].pitch = buffers[i].pitch;
 460       pdraw->buffers[i].cpp = buffers[i].cpp;
 461       pdraw->buffers[i].flags = buffers[i].flags;
 462       if (pdraw->buffers[i].attachment == __DRI_BUFFER_FAKE_FRONT_LEFT)
 463          pdraw->have_fake_front = 1;
 464       if (pdraw->buffers[i].attachment == __DRI_BUFFER_BACK_LEFT)
 465          pdraw->have_back = 1;
 466    }
 467
 468 }
 469
 470 static int64_t
 471 dri2SwapBuffers(__GLXDRIdrawable *pdraw, int64_t target_msc, int64_t divisor,
 472                 int64_t remainder)
 473 {
 474     struct dri2_drawable *priv = (struct dri2_drawable *) pdraw;
 475     __GLXdisplayPrivate *dpyPriv = __glXInitialize(priv->base.psc->dpy);
 476     struct dri2_screen *psc = (struct dri2_screen *) priv->base.psc;
 477     struct dri2_display *pdp =
 478         (struct dri2_display *)dpyPriv->dri2Display;
 479     CARD64 ret;
 480
 481 #ifdef __DRI2_FLUSH
 482     if (psc->f)
 483         (*psc->f->flush)(priv->driDrawable);
 484 #endif
 485
 486     /* Old servers don't send invalidate events */
 487     if (!pdp->invalidateAvailable)
 488        dri2InvalidateBuffers(dpyPriv->dpy, pdraw->drawable);
 489
 490     /* Old servers can't handle swapbuffers */
 491     if (!pdp->swapAvailable) {
 492        dri2CopySubBuffer(pdraw, 0, 0, priv->width, priv->height);
 493        return 0;
 494     }
 495
 496 #ifdef X_DRI2SwapBuffers
 497     DRI2SwapBuffers(psc->base.dpy, pdraw->xDrawable, target_msc, divisor,
 498                     remainder, &ret);
 499 #endif
 500
 501     return ret;
 502 }
 503
 504 static __DRIbuffer *
 505 dri2GetBuffers(__DRIdrawable * driDrawable,
 506                int *width, int *height,
 507                unsigned int *attachments, int count,
 508                int *out_count, void *loaderPrivate)
 509 {
 510    struct dri2_drawable *pdraw = loaderPrivate;
 511    DRI2Buffer *buffers;
 512
 513    buffers = DRI2GetBuffers(pdraw->base.psc->dpy, pdraw->base.xDrawable,
 514                             width, height, attachments, count, out_count);
 515    if (buffers == NULL)
 516       return NULL;
 517
 518    pdraw->width = *width;
 519    pdraw->height = *height;
 520    process_buffers(pdraw, buffers, *out_count);
 521
 522    Xfree(buffers);
 523
 524    return pdraw->buffers;
 525 }
 526
 527 static __DRIbuffer *
 528 dri2GetBuffersWithFormat(__DRIdrawable * driDrawable,
 529                          int *width, int *height,
 530                          unsigned int *attachments, int count,
 531                          int *out_count, void *loaderPrivate)
 532 {
 533    struct dri2_drawable *pdraw = loaderPrivate;
 534    DRI2Buffer *buffers;
 535
 536    buffers = DRI2GetBuffersWithFormat(pdraw->base.psc->dpy,
 537                                       pdraw->base.xDrawable,
 538                                       width, height, attachments,
 539                                       count, out_count);
 540    if (buffers == NULL)
 541       return NULL;
 542
 543    pdraw->width = *width;
 544    pdraw->height = *height;
 545    process_buffers(pdraw, buffers, *out_count);
 546
 547    Xfree(buffers);
 548
 549    return pdraw->buffers;
 550 }
 551
 552 #ifdef X_DRI2SwapInterval
 553
 554 static int
 555 dri2SetSwapInterval(__GLXDRIdrawable *pdraw, int interval)
 556 {
 557    struct dri2_drawable *priv =  (struct dri2_drawable *) pdraw;
 558    GLint vblank_mode = DRI_CONF_VBLANK_DEF_INTERVAL_1;
 559    struct dri2_screen *psc = (struct dri2_screen *) priv->base.psc;
 560
 561    if (psc->config)
 562       psc->config->configQueryi(psc->driScreen,
 563                                 "vblank_mode", &vblank_mode);
 564
 565    switch (vblank_mode) {
 566    case DRI_CONF_VBLANK_NEVER:
 567       return GLX_BAD_VALUE;
 568    case DRI_CONF_VBLANK_ALWAYS_SYNC:
 569       if (interval <= 0)
 570          return GLX_BAD_VALUE;
 571       break;
 572    default:
 573       break;
 574    }
 575
 576    DRI2SwapInterval(priv->base.psc->dpy, priv->base.xDrawable, interval);
 577    priv->swap_interval = interval;
 578
 579    return 0;
 580 }
 581
 582 static int
 583 dri2GetSwapInterval(__GLXDRIdrawable *pdraw)
 584 {
 585    struct dri2_drawable *priv =  (struct dri2_drawable *) pdraw;
 586
 587   return priv->swap_interval;
 588 }
 589
 590 #endif /* X_DRI2SwapInterval */
 591
 592 static const __DRIdri2LoaderExtension dri2LoaderExtension = {
 593    {__DRI_DRI2_LOADER, __DRI_DRI2_LOADER_VERSION},
 594    dri2GetBuffers,
 595    dri2FlushFrontBuffer,
 596    dri2GetBuffersWithFormat,
 597 };
 598
 599 static const __DRIdri2LoaderExtension dri2LoaderExtension_old = {
 600    {__DRI_DRI2_LOADER, __DRI_DRI2_LOADER_VERSION},
 601    dri2GetBuffers,
 602    dri2FlushFrontBuffer,
 603    NULL,
 604 };
 605
 606 #ifdef __DRI_USE_INVALIDATE
 607 static const __DRIuseInvalidateExtension dri2UseInvalidate = {
 608    { __DRI_USE_INVALIDATE, __DRI_USE_INVALIDATE_VERSION }
 609 };
 610 #endif
 611
 612 _X_HIDDEN void
 613 dri2InvalidateBuffers(Display *dpy, XID drawable)
 614 {
 615    __GLXDRIdrawable *pdraw =
 616       dri2GetGlxDrawableFromXDrawableId(dpy, drawable);
 617    struct dri2_screen *psc = (struct dri2_screen *) pdraw->psc;
 618    struct dri2_drawable *pdp = (struct dri2_drawable *) pdraw;
 619
 620 #if __DRI2_FLUSH_VERSION >= 3
 621    if (pdraw && psc->f)
 622        psc->f->invalidate(pdp->driDrawable);
 623 #endif
 624 }
 625
 626 static void
 627 dri2_bind_tex_image(Display * dpy,
 628                     GLXDrawable drawable,
 629                     int buffer, const int *attrib_list)
 630 {
 631    GLXContext gc = __glXGetCurrentContext();
 632    __GLXDRIdrawable *base = GetGLXDRIDrawable(dpy, drawable, NULL);
 633    __GLXdisplayPrivate *dpyPriv = __glXInitialize(dpy);
 634    struct dri2_drawable *pdraw = (struct dri2_drawable *) base;
 635    struct dri2_display *pdp =
 636       (struct dri2_display *) dpyPriv->dri2Display;
 637    struct dri2_screen *psc = (struct dri2_screen *) base->psc;
 638
 639    if (pdraw != NULL) {
 640
 641 #if __DRI2_FLUSH_VERSION >= 3
 642       if (!pdp->invalidateAvailable && psc->f)
 643          psc->f->invalidate(pdraw->driDrawable);
 644 #endif
 645
 646       if (psc->texBuffer->base.version >= 2 &&
 647           psc->texBuffer->setTexBuffer2 != NULL) {
 648          (*psc->texBuffer->setTexBuffer2) (gc->__driContext,
 649                                            pdraw->base.textureTarget,
 650                                            pdraw->base.textureFormat,
 651                                            pdraw->driDrawable);
 652       }
 653       else {
 654          (*psc->texBuffer->setTexBuffer) (gc->__driContext,
 655                                           pdraw->base.textureTarget,
 656                                           pdraw->driDrawable);
 657       }
 658    }
 659 }
 660
 661 static void
 662 dri2_release_tex_image(Display * dpy, GLXDrawable drawable, int buffer)
 663 {
 664 }
 665
 666 static const struct glx_context_vtable dri2_context_vtable = {
 667    dri2_bind_tex_image,
 668    dri2_release_tex_image,
 669 };
 670
 671 static void
 672 dri2BindExtensions(struct dri2_screen *psc, const __DRIextension **extensions)
 673 {
 674    int i;
 675
 676    __glXEnableDirectExtension(&psc->base, "GLX_SGI_video_sync");
 677    __glXEnableDirectExtension(&psc->base, "GLX_SGI_swap_control");
 678    __glXEnableDirectExtension(&psc->base, "GLX_MESA_swap_control");
 679
 680    /* FIXME: if DRI2 version supports it... */
 681    __glXEnableDirectExtension(&psc->base, "INTEL_swap_event");
 682
 683    for (i = 0; extensions[i]; i++) {
 684       if ((strcmp(extensions[i]->name, __DRI_TEX_BUFFER) == 0)) {
 685          psc->texBuffer = (__DRItexBufferExtension *) extensions[i];
 686          __glXEnableDirectExtension(&psc->base, "GLX_EXT_texture_from_pixmap");
 687       }
 688
 689       if ((strcmp(extensions[i]->name, __DRI2_FLUSH) == 0)) {
 690          psc->f = (__DRI2flushExtension *) extensions[i];
 691          /* internal driver extension, no GL extension exposed */
 692       }
 693
 694       if ((strcmp(extensions[i]->name, __DRI2_CONFIG_QUERY) == 0))
 695          psc->config = (__DRI2configQueryExtension *) extensions[i];
 696    }
 697 }
 698
 699
 700 static __GLXscreenConfigs *
 701 dri2CreateScreen(int screen, __GLXdisplayPrivate * priv)
 702 {
 703    const __DRIconfig **driver_configs;
 704    const __DRIextension **extensions;
 705    const struct dri2_display *const pdp = (struct dri2_display *)
 706       priv->dri2Display;
 707    struct dri2_screen *psc;
 708    __GLXDRIscreen *psp;
 709    char *driverName, *deviceName;
 710    drm_magic_t magic;
 711    int i;
 712
 713    psc = Xmalloc(sizeof *psc);
 714    if (psc == NULL)
 715       return NULL;
 716
 717    memset(psc, 0, sizeof *psc);
 718    if (!glx_screen_init(&psc->base, screen, priv))
 719        return NULL;
 720
 721    if (!DRI2Connect(priv->dpy, RootWindow(priv->dpy, screen),
 722                     &driverName, &deviceName)) {
 723       XFree(psc);
 724       return NULL;
 725    }
 726
 727    psc->driver = driOpenDriver(driverName);
 728    if (psc->driver == NULL) {
 729       ErrorMessageF("driver pointer missing\n");
 730       goto handle_error;
 731    }
 732
 733    extensions = dlsym(psc->driver, __DRI_DRIVER_EXTENSIONS);
 734    if (extensions == NULL) {
 735       ErrorMessageF("driver exports no extensions (%s)\n", dlerror());
 736       goto handle_error;
 737    }
 738
 739    for (i = 0; extensions[i]; i++) {
 740       if (strcmp(extensions[i]->name, __DRI_CORE) == 0)
 741          psc->core = (__DRIcoreExtension *) extensions[i];
 742       if (strcmp(extensions[i]->name, __DRI_DRI2) == 0)
 743          psc->dri2 = (__DRIdri2Extension *) extensions[i];
 744    }
 745
 746    if (psc->core == NULL || psc->dri2 == NULL) {
 747       ErrorMessageF("core dri or dri2 extension not found\n");
 748       goto handle_error;
 749    }
 750
 751    psc->fd = open(deviceName, O_RDWR);
 752    if (psc->fd < 0) {
 753       ErrorMessageF("failed to open drm device: %s\n", strerror(errno));
 754       goto handle_error;
 755    }
 756
 757    if (drmGetMagic(psc->fd, &magic)) {
 758       ErrorMessageF("failed to get magic\n");
 759       goto handle_error;
 760    }
 761
 762    if (!DRI2Authenticate(priv->dpy, RootWindow(priv->dpy, screen), magic)) {
 763       ErrorMessageF("failed to authenticate magic %d\n", magic);
 764       goto handle_error;
 765    }
 766
 767
 768    /* If the server does not support the protocol for
 769     * DRI2GetBuffersWithFormat, don't supply that interface to the driver.
 770     */
 771    psc->driScreen =
 772       psc->dri2->createNewScreen(screen, psc->fd,
 773                                  (const __DRIextension **)
 774                                  &pdp->loader_extensions[0],
 775                                  &driver_configs, psc);
 776
 777    if (psc->driScreen == NULL) {
 778       ErrorMessageF("failed to create dri screen\n");
 779       goto handle_error;
 780    }
 781
 782    extensions = psc->core->getExtensions(psc->driScreen);
 783    driBindCommonExtensions(&psc->base, extensions);
 784    dri2BindExtensions(psc, extensions);
 785
 786    psc->base.configs =
 787       driConvertConfigs(psc->core, psc->base.configs, driver_configs);
 788    psc->base.visuals =
 789       driConvertConfigs(psc->core, psc->base.visuals, driver_configs);
 790
 791    psc->base.driver_configs = driver_configs;
 792
 793    psp = &psc->vtable;
 794    psc->base.driScreen = psp;
 795    psp->destroyScreen = dri2DestroyScreen;
 796    psp->createContext = dri2CreateContext;
 797    psp->createDrawable = dri2CreateDrawable;
 798    psp->swapBuffers = dri2SwapBuffers;
 799    psp->waitGL = dri2WaitGL;
 800    psp->waitX = dri2WaitX;
 801    psp->getDrawableMSC = NULL;
 802    psp->waitForMSC = NULL;
 803    psp->waitForSBC = NULL;
 804    psp->setSwapInterval = NULL;
 805    psp->getSwapInterval = NULL;
 806
 807    if (pdp->driMinor >= 2) {
 808 #ifdef X_DRI2GetMSC
 809       psp->getDrawableMSC = dri2DrawableGetMSC;
 810 #endif
 811 #ifdef X_DRI2WaitMSC
 812       psp->waitForMSC = dri2WaitForMSC;
 813       psp->waitForSBC = dri2WaitForSBC;
 814 #endif
 815 #ifdef X_DRI2SwapInterval
 816       psp->setSwapInterval = dri2SetSwapInterval;
 817       psp->getSwapInterval = dri2GetSwapInterval;
 818 #endif
 819 #if defined(X_DRI2GetMSC) && defined(X_DRI2WaitMSC) && defined(X_DRI2SwapInterval)
 820       __glXEnableDirectExtension(&psc->base, "GLX_OML_sync_control");
 821 #endif
 822    }
 823
 824    /* DRI2 suports SubBuffer through DRI2CopyRegion, so it's always
 825     * available.*/
 826    psp->copySubBuffer = dri2CopySubBuffer;
 827    __glXEnableDirectExtension(&psc->base, "GLX_MESA_copy_sub_buffer");
 828
 829    psc->base.direct_context_vtable = &dri2_context_vtable;
 830
 831    Xfree(driverName);
 832    Xfree(deviceName);
 833
 834    return &psc->base;
 835
 836 handle_error:
 837    Xfree(driverName);
 838    Xfree(deviceName);
 839    XFree(psc);
 840
 841    /* FIXME: clean up here */
 842
 843    return NULL;
 844 }
 845
 846 /* Called from __glXFreeDisplayPrivate.
 847  */
 848 static void
 849 dri2DestroyDisplay(__GLXDRIdisplay * dpy)
 850 {
 851    Xfree(dpy);
 852 }
 853
 854 _X_HIDDEN __GLXDRIdrawable *
 855 dri2GetGlxDrawableFromXDrawableId(Display *dpy, XID id)
 856 {
 857    __GLXdisplayPrivate *d = __glXInitialize(dpy);
 858    struct dri2_display *pdp = (struct dri2_display *) d->dri2Display;
 859    __GLXDRIdrawable *pdraw;
 860
 861    if (__glxHashLookup(pdp->dri2Hash, id, (void *) &pdraw) == 0)
 862       return pdraw;
 863
 864    return NULL;
 865 }
 866
 867 /*
 868  * Allocate, initialize and return a __DRIdisplayPrivate object.
 869  * This is called from __glXInitialize() when we are given a new
 870  * display pointer.
 871  */
 872 _X_HIDDEN __GLXDRIdisplay *
 873 dri2CreateDisplay(Display * dpy)
 874 {
 875    struct dri2_display *pdp;
 876    int eventBase, errorBase, i;
 877
 878    if (!DRI2QueryExtension(dpy, &eventBase, &errorBase))
 879       return NULL;
 880
 881    pdp = Xmalloc(sizeof *pdp);
 882    if (pdp == NULL)
 883       return NULL;
 884
 885    if (!DRI2QueryVersion(dpy, &pdp->driMajor, &pdp->driMinor)) {
 886       Xfree(pdp);
 887       return NULL;
 888    }
 889
 890    pdp->driPatch = 0;
 891    pdp->swapAvailable = (pdp->driMinor >= 2);
 892    pdp->invalidateAvailable = (pdp->driMinor >= 3);
 893
 894    pdp->base.destroyDisplay = dri2DestroyDisplay;
 895    pdp->base.createScreen = dri2CreateScreen;
 896
 897    i = 0;
 898    if (pdp->driMinor < 1)
 899       pdp->loader_extensions[i++] = &dri2LoaderExtension_old.base;
 900    else
 901       pdp->loader_extensions[i++] = &dri2LoaderExtension.base;
 902
 903    pdp->loader_extensions[i++] = &systemTimeExtension.base;
 904
 905 #ifdef __DRI_USE_INVALIDATE
 906    pdp->loader_extensions[i++] = &dri2UseInvalidate.base;
 907 #endif
 908    pdp->loader_extensions[i++] = NULL;
 909
 910    pdp->dri2Hash = __glxHashCreate();
 911    if (pdp->dri2Hash == NULL) {
 912       Xfree(pdp);
 913       return NULL;
 914    }
 915
 916    return &pdp->base;
 917 }
 918
 919 #endif /* GLX_DIRECT_RENDERING */