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