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