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    const __DRIconfig **driver_configs;
  90
  91    void *driver;
  92    int fd;
  93 };
  94
  95 struct dri2_context
  96 {
  97    __GLXcontext base;
  98    __GLXDRIcontext dri_vtable;
  99    __DRIcontext *driContext;
 100 };
 101
 102 struct dri2_drawable
 103 {
 104    __GLXDRIdrawable base;
 105    __DRIdrawable *driDrawable;
 106    __DRIbuffer buffers[5];
 107    int bufferCount;
 108    int width, height;
 109    int have_back;
 110    int have_fake_front;
 111    int swap_interval;
 112 };
 113
 114 static const struct glx_context_vtable dri2_context_vtable;
 115
 116 static void
 117 dri2DestroyContext(__GLXcontext *context)
 118 {
 119    struct dri2_context *pcp = (struct dri2_context *) context;
 120    struct dri2_screen *psc = (struct dri2_screen *) context->psc;
 121
 122    (*psc->core->destroyContext) (pcp->driContext);
 123
 124    Xfree(pcp);
 125 }
 126
 127 static Bool
 128 dri2BindContext(__GLXcontext *context,
 129                 __GLXDRIdrawable *draw, __GLXDRIdrawable *read)
 130 {
 131    struct dri2_context *pcp = (struct dri2_context *) context;
 132    struct dri2_screen *psc = (struct dri2_screen *) pcp->base.psc;
 133    struct dri2_drawable *pdr = (struct dri2_drawable *) draw;
 134    struct dri2_drawable *prd = (struct dri2_drawable *) read;
 135
 136    return (*psc->core->bindContext) (pcp->driContext,
 137                                      pdr->driDrawable, prd->driDrawable);
 138 }
 139
 140 static void
 141 dri2UnbindContext(__GLXcontext *context)
 142 {
 143    struct dri2_context *pcp = (struct dri2_context *) context;
 144    struct dri2_screen *psc = (struct dri2_screen *) pcp->base.psc;
 145
 146    (*psc->core->unbindContext) (pcp->driContext);
 147 }
 148
 149 static __GLXcontext *
 150 dri2CreateContext(__GLXscreenConfigs *base,
 151                   const __GLcontextModes * mode,
 152                   GLXContext shareList, int renderType)
 153 {
 154    struct dri2_context *pcp, *pcp_shared;
 155    struct dri2_screen *psc = (struct dri2_screen *) base;
 156    __GLXDRIconfigPrivate *config = (__GLXDRIconfigPrivate *) mode;
 157    __DRIcontext *shared = NULL;
 158
 159    if (shareList) {
 160       pcp_shared = (struct dri2_context *) shareList->driContext;
 161       shared = pcp_shared->driContext;
 162    }
 163
 164    pcp = Xmalloc(sizeof *pcp);
 165    if (pcp == NULL)
 166       return NULL;
 167
 168    memset(pcp, 0, sizeof *pcp);
 169    if (!glx_context_init(&pcp->base, &psc->base, mode)) {
 170       Xfree(pcp);
 171       return NULL;
 172    }
 173
 174    pcp->driContext =
 175       (*psc->dri2->createNewContext) (psc->driScreen,
 176                                       config->driConfig, shared, pcp);
 177
 178    if (pcp->driContext == NULL) {
 179       Xfree(pcp);
 180       return NULL;
 181    }
 182
 183    pcp->base.vtable = &dri2_context_vtable;
 184    pcp->base.driContext = &pcp->dri_vtable;
 185    pcp->dri_vtable.destroyContext = dri2DestroyContext;
 186    pcp->dri_vtable.bindContext = dri2BindContext;
 187    pcp->dri_vtable.unbindContext = dri2UnbindContext;
 188
 189    return &pcp->base;
 190 }
 191
 192 static void
 193 dri2DestroyDrawable(__GLXDRIdrawable *base)
 194 {
 195    struct dri2_screen *psc = (struct dri2_screen *) base->psc;
 196    struct dri2_drawable *pdraw = (struct dri2_drawable *) base;
 197    __GLXdisplayPrivate *dpyPriv = psc->base.display;
 198    struct dri2_display *pdp = (struct dri2_display *)dpyPriv->dri2Display;
 199
 200    __glxHashDelete(pdp->dri2Hash, pdraw->base.xDrawable);
 201    (*psc->core->destroyDrawable) (pdraw->driDrawable);
 202    DRI2DestroyDrawable(psc->base.dpy, pdraw->base.xDrawable);
 203    Xfree(pdraw);
 204 }
 205
 206 static __GLXDRIdrawable *
 207 dri2CreateDrawable(__GLXscreenConfigs *base, XID xDrawable,
 208                    GLXDrawable drawable, const __GLcontextModes * modes)
 209 {
 210    struct dri2_drawable *pdraw;
 211    struct dri2_screen *psc = (struct dri2_screen *) base;
 212    __GLXDRIconfigPrivate *config = (__GLXDRIconfigPrivate *) modes;
 213    __GLXdisplayPrivate *dpyPriv;
 214    struct dri2_display *pdp;
 215    GLint vblank_mode = DRI_CONF_VBLANK_DEF_INTERVAL_1;
 216
 217    pdraw = Xmalloc(sizeof(*pdraw));
 218    if (!pdraw)
 219       return NULL;
 220
 221    pdraw->base.destroyDrawable = dri2DestroyDrawable;
 222    pdraw->base.xDrawable = xDrawable;
 223    pdraw->base.drawable = drawable;
 224    pdraw->base.psc = &psc->base;
 225    pdraw->bufferCount = 0;
 226    pdraw->swap_interval = 1; /* default may be overridden below */
 227    pdraw->have_back = 0;
 228
 229    if (psc->config)
 230       psc->config->configQueryi(psc->driScreen,
 231                                 "vblank_mode", &vblank_mode);
 232
 233    switch (vblank_mode) {
 234    case DRI_CONF_VBLANK_NEVER:
 235    case DRI_CONF_VBLANK_DEF_INTERVAL_0:
 236       pdraw->swap_interval = 0;
 237       break;
 238    case DRI_CONF_VBLANK_DEF_INTERVAL_1:
 239    case DRI_CONF_VBLANK_ALWAYS_SYNC:
 240    default:
 241       pdraw->swap_interval = 1;
 242       break;
 243    }
 244
 245    DRI2CreateDrawable(psc->base.dpy, xDrawable);
 246
 247    dpyPriv = __glXInitialize(psc->base.dpy);
 248    pdp = (struct dri2_display *)dpyPriv->dri2Display;;
 249    /* Create a new drawable */
 250    pdraw->driDrawable =
 251       (*psc->dri2->createNewDrawable) (psc->driScreen,
 252                                        config->driConfig, pdraw);
 253
 254    if (!pdraw->driDrawable) {
 255       DRI2DestroyDrawable(psc->base.dpy, xDrawable);
 256       Xfree(pdraw);
 257       return NULL;
 258    }
 259
 260    if (__glxHashInsert(pdp->dri2Hash, xDrawable, pdraw)) {
 261       (*psc->core->destroyDrawable) (pdraw->driDrawable);
 262       DRI2DestroyDrawable(psc->base.dpy, xDrawable);
 263       Xfree(pdraw);
 264       return None;
 265    }
 266
 267
 268 #ifdef X_DRI2SwapInterval
 269    /*
 270     * Make sure server has the same swap interval we do for the new
 271     * drawable.
 272     */
 273    if (pdp->swapAvailable)
 274       DRI2SwapInterval(psc->base.dpy, xDrawable, pdraw->swap_interval);
 275 #endif
 276
 277    return &pdraw->base;
 278 }
 279
 280 #ifdef X_DRI2GetMSC
 281
 282 static int
 283 dri2DrawableGetMSC(__GLXscreenConfigs *psc, __GLXDRIdrawable *pdraw,
 284                    int64_t *ust, int64_t *msc, int64_t *sbc)
 285 {
 286    CARD64 dri2_ust, dri2_msc, dri2_sbc;
 287    int ret;
 288
 289    ret = DRI2GetMSC(psc->dpy, pdraw->xDrawable,
 290                     &dri2_ust, &dri2_msc, &dri2_sbc);
 291    *ust = dri2_ust;
 292    *msc = dri2_msc;
 293    *sbc = dri2_sbc;
 294
 295    return ret;
 296 }
 297
 298 #endif
 299
 300
 301 #ifdef X_DRI2WaitMSC
 302
 303 static int
 304 dri2WaitForMSC(__GLXDRIdrawable *pdraw, int64_t target_msc, int64_t divisor,
 305                int64_t remainder, int64_t *ust, int64_t *msc, int64_t *sbc)
 306 {
 307    CARD64 dri2_ust, dri2_msc, dri2_sbc;
 308    int ret;
 309
 310    ret = DRI2WaitMSC(pdraw->psc->dpy, pdraw->xDrawable, target_msc, divisor,
 311                      remainder, &dri2_ust, &dri2_msc, &dri2_sbc);
 312    *ust = dri2_ust;
 313    *msc = dri2_msc;
 314    *sbc = dri2_sbc;
 315
 316    return ret;
 317 }
 318
 319 static int
 320 dri2WaitForSBC(__GLXDRIdrawable *pdraw, int64_t target_sbc, int64_t *ust,
 321                int64_t *msc, int64_t *sbc)
 322 {
 323    CARD64 dri2_ust, dri2_msc, dri2_sbc;
 324    int ret;
 325
 326    ret = DRI2WaitSBC(pdraw->psc->dpy, pdraw->xDrawable,
 327                      target_sbc, &dri2_ust, &dri2_msc, &dri2_sbc);
 328    *ust = dri2_ust;
 329    *msc = dri2_msc;
 330    *sbc = dri2_sbc;
 331
 332    return ret;
 333 }
 334
 335 #endif /* X_DRI2WaitMSC */
 336
 337 static void
 338 dri2CopySubBuffer(__GLXDRIdrawable *pdraw, int x, int y, int width, int height)
 339 {
 340    struct dri2_drawable *priv = (struct dri2_drawable *) pdraw;
 341    struct dri2_screen *psc = (struct dri2_screen *) pdraw->psc;
 342    XRectangle xrect;
 343    XserverRegion region;
 344
 345    /* Check we have the right attachments */
 346    if (!priv->have_back)
 347       return;
 348
 349    xrect.x = x;
 350    xrect.y = priv->height - y - height;
 351    xrect.width = width;
 352    xrect.height = height;
 353
 354 #ifdef __DRI2_FLUSH
 355    if (psc->f)
 356       (*psc->f->flush) (priv->driDrawable);
 357 #endif
 358
 359    region = XFixesCreateRegion(psc->base.dpy, &xrect, 1);
 360    DRI2CopyRegion(psc->base.dpy, pdraw->xDrawable, region,
 361                   DRI2BufferFrontLeft, DRI2BufferBackLeft);
 362
 363    /* Refresh the fake front (if present) after we just damaged the real
 364     * front.
 365     */
 366    if (priv->have_fake_front)
 367       DRI2CopyRegion(psc->base.dpy, pdraw->xDrawable, region,
 368                      DRI2BufferFakeFrontLeft, DRI2BufferFrontLeft);
 369
 370    XFixesDestroyRegion(psc->base.dpy, region);
 371 }
 372
 373 static void
 374 dri2_copy_drawable(struct dri2_drawable *priv, int dest, int src)
 375 {
 376    XRectangle xrect;
 377    XserverRegion region;
 378    struct dri2_screen *psc = (struct dri2_screen *) priv->base.psc;
 379
 380    xrect.x = 0;
 381    xrect.y = 0;
 382    xrect.width = priv->width;
 383    xrect.height = priv->height;
 384
 385 #ifdef __DRI2_FLUSH
 386    if (psc->f)
 387       (*psc->f->flush) (priv->driDrawable);
 388 #endif
 389
 390    region = XFixesCreateRegion(psc->base.dpy, &xrect, 1);
 391    DRI2CopyRegion(psc->base.dpy, priv->base.xDrawable, region, dest, src);
 392    XFixesDestroyRegion(psc->base.dpy, region);
 393
 394 }
 395
 396 static void
 397 dri2WaitX(__GLXDRIdrawable *pdraw)
 398 {
 399    struct dri2_drawable *priv = (struct dri2_drawable *) pdraw;
 400
 401    if (!priv->have_fake_front)
 402       return;
 403
 404    dri2_copy_drawable(priv, DRI2BufferFakeFrontLeft, DRI2BufferFrontLeft);
 405 }
 406
 407 static void
 408 dri2WaitGL(__GLXDRIdrawable * pdraw)
 409 {
 410    struct dri2_drawable *priv = (struct dri2_drawable *) pdraw;
 411
 412    if (!priv->have_fake_front)
 413       return;
 414
 415    dri2_copy_drawable(priv, DRI2BufferFrontLeft, DRI2BufferFakeFrontLeft);
 416 }
 417
 418 static void
 419 dri2FlushFrontBuffer(__DRIdrawable *driDrawable, void *loaderPrivate)
 420 {
 421    struct dri2_drawable *pdraw = loaderPrivate;
 422    __GLXdisplayPrivate *priv = __glXInitialize(pdraw->base.psc->dpy);
 423    struct dri2_display *pdp = (struct dri2_display *)priv->dri2Display;
 424
 425    /* Old servers don't send invalidate events */
 426    if (!pdp->invalidateAvailable)
 427        dri2InvalidateBuffers(priv->dpy, pdraw->base.drawable);
 428
 429    dri2WaitGL(loaderPrivate);
 430 }
 431
 432
 433 static void
 434 dri2DestroyScreen(__GLXscreenConfigs *base)
 435 {
 436    struct dri2_screen *psc = (struct dri2_screen *) base;
 437
 438    /* Free the direct rendering per screen data */
 439    (*psc->core->destroyScreen) (psc->driScreen);
 440    driDestroyConfigs(psc->driver_configs);
 441    close(psc->fd);
 442    Xfree(psc);
 443 }
 444
 445 /**
 446  * Process list of buffer received from the server
 447  *
 448  * Processes the list of buffers received in a reply from the server to either
 449  * \c DRI2GetBuffers or \c DRI2GetBuffersWithFormat.
 450  */
 451 static void
 452 process_buffers(struct dri2_drawable * pdraw, DRI2Buffer * buffers,
 453                 unsigned count)
 454 {
 455    int i;
 456
 457    pdraw->bufferCount = count;
 458    pdraw->have_fake_front = 0;
 459    pdraw->have_back = 0;
 460
 461    /* This assumes the DRI2 buffer attachment tokens matches the
 462     * __DRIbuffer tokens. */
 463    for (i = 0; i < count; i++) {
 464       pdraw->buffers[i].attachment = buffers[i].attachment;
 465       pdraw->buffers[i].name = buffers[i].name;
 466       pdraw->buffers[i].pitch = buffers[i].pitch;
 467       pdraw->buffers[i].cpp = buffers[i].cpp;
 468       pdraw->buffers[i].flags = buffers[i].flags;
 469       if (pdraw->buffers[i].attachment == __DRI_BUFFER_FAKE_FRONT_LEFT)
 470          pdraw->have_fake_front = 1;
 471       if (pdraw->buffers[i].attachment == __DRI_BUFFER_BACK_LEFT)
 472          pdraw->have_back = 1;
 473    }
 474
 475 }
 476
 477 static int64_t
 478 dri2SwapBuffers(__GLXDRIdrawable *pdraw, int64_t target_msc, int64_t divisor,
 479                 int64_t remainder)
 480 {
 481     struct dri2_drawable *priv = (struct dri2_drawable *) pdraw;
 482     __GLXdisplayPrivate *dpyPriv = __glXInitialize(priv->base.psc->dpy);
 483     struct dri2_screen *psc = (struct dri2_screen *) priv->base.psc;
 484     struct dri2_display *pdp =
 485         (struct dri2_display *)dpyPriv->dri2Display;
 486     CARD64 ret;
 487
 488 #ifdef __DRI2_FLUSH
 489     if (psc->f)
 490         (*psc->f->flush)(priv->driDrawable);
 491 #endif
 492
 493     /* Old servers don't send invalidate events */
 494     if (!pdp->invalidateAvailable)
 495        dri2InvalidateBuffers(dpyPriv->dpy, pdraw->drawable);
 496
 497     /* Old servers can't handle swapbuffers */
 498     if (!pdp->swapAvailable) {
 499        dri2CopySubBuffer(pdraw, 0, 0, priv->width, priv->height);
 500        return 0;
 501     }
 502
 503 #ifdef X_DRI2SwapBuffers
 504     DRI2SwapBuffers(psc->base.dpy, pdraw->xDrawable, target_msc, divisor,
 505                     remainder, &ret);
 506 #endif
 507
 508     return ret;
 509 }
 510
 511 static __DRIbuffer *
 512 dri2GetBuffers(__DRIdrawable * driDrawable,
 513                int *width, int *height,
 514                unsigned int *attachments, int count,
 515                int *out_count, void *loaderPrivate)
 516 {
 517    struct dri2_drawable *pdraw = loaderPrivate;
 518    DRI2Buffer *buffers;
 519
 520    buffers = DRI2GetBuffers(pdraw->base.psc->dpy, pdraw->base.xDrawable,
 521                             width, height, attachments, count, out_count);
 522    if (buffers == NULL)
 523       return NULL;
 524
 525    pdraw->width = *width;
 526    pdraw->height = *height;
 527    process_buffers(pdraw, buffers, *out_count);
 528
 529    Xfree(buffers);
 530
 531    return pdraw->buffers;
 532 }
 533
 534 static __DRIbuffer *
 535 dri2GetBuffersWithFormat(__DRIdrawable * driDrawable,
 536                          int *width, int *height,
 537                          unsigned int *attachments, int count,
 538                          int *out_count, void *loaderPrivate)
 539 {
 540    struct dri2_drawable *pdraw = loaderPrivate;
 541    DRI2Buffer *buffers;
 542
 543    buffers = DRI2GetBuffersWithFormat(pdraw->base.psc->dpy,
 544                                       pdraw->base.xDrawable,
 545                                       width, height, attachments,
 546                                       count, out_count);
 547    if (buffers == NULL)
 548       return NULL;
 549
 550    pdraw->width = *width;
 551    pdraw->height = *height;
 552    process_buffers(pdraw, buffers, *out_count);
 553
 554    Xfree(buffers);
 555
 556    return pdraw->buffers;
 557 }
 558
 559 #ifdef X_DRI2SwapInterval
 560
 561 static int
 562 dri2SetSwapInterval(__GLXDRIdrawable *pdraw, int interval)
 563 {
 564    struct dri2_drawable *priv =  (struct dri2_drawable *) pdraw;
 565    GLint vblank_mode = DRI_CONF_VBLANK_DEF_INTERVAL_1;
 566    struct dri2_screen *psc = (struct dri2_screen *) priv->base.psc;
 567
 568    if (psc->config)
 569       psc->config->configQueryi(psc->driScreen,
 570                                 "vblank_mode", &vblank_mode);
 571
 572    switch (vblank_mode) {
 573    case DRI_CONF_VBLANK_NEVER:
 574       return GLX_BAD_VALUE;
 575    case DRI_CONF_VBLANK_ALWAYS_SYNC:
 576       if (interval <= 0)
 577          return GLX_BAD_VALUE;
 578       break;
 579    default:
 580       break;
 581    }
 582
 583    DRI2SwapInterval(priv->base.psc->dpy, priv->base.xDrawable, interval);
 584    priv->swap_interval = interval;
 585
 586    return 0;
 587 }
 588
 589 static int
 590 dri2GetSwapInterval(__GLXDRIdrawable *pdraw)
 591 {
 592    struct dri2_drawable *priv =  (struct dri2_drawable *) pdraw;
 593
 594   return priv->swap_interval;
 595 }
 596
 597 #endif /* X_DRI2SwapInterval */
 598
 599 static const __DRIdri2LoaderExtension dri2LoaderExtension = {
 600    {__DRI_DRI2_LOADER, __DRI_DRI2_LOADER_VERSION},
 601    dri2GetBuffers,
 602    dri2FlushFrontBuffer,
 603    dri2GetBuffersWithFormat,
 604 };
 605
 606 static const __DRIdri2LoaderExtension dri2LoaderExtension_old = {
 607    {__DRI_DRI2_LOADER, __DRI_DRI2_LOADER_VERSION},
 608    dri2GetBuffers,
 609    dri2FlushFrontBuffer,
 610    NULL,
 611 };
 612
 613 #ifdef __DRI_USE_INVALIDATE
 614 static const __DRIuseInvalidateExtension dri2UseInvalidate = {
 615    { __DRI_USE_INVALIDATE, __DRI_USE_INVALIDATE_VERSION }
 616 };
 617 #endif
 618
 619 _X_HIDDEN void
 620 dri2InvalidateBuffers(Display *dpy, XID drawable)
 621 {
 622    __GLXDRIdrawable *pdraw =
 623       dri2GetGlxDrawableFromXDrawableId(dpy, drawable);
 624    struct dri2_screen *psc = (struct dri2_screen *) pdraw->psc;
 625    struct dri2_drawable *pdp = (struct dri2_drawable *) pdraw;
 626
 627 #if __DRI2_FLUSH_VERSION >= 3
 628    if (pdraw && psc->f)
 629        psc->f->invalidate(pdp->driDrawable);
 630 #endif
 631 }
 632
 633 static void
 634 dri2_bind_tex_image(Display * dpy,
 635                     GLXDrawable drawable,
 636                     int buffer, const int *attrib_list)
 637 {
 638    GLXContext gc = __glXGetCurrentContext();
 639    __GLXDRIdrawable *base = GetGLXDRIDrawable(dpy, drawable, NULL);
 640    __GLXdisplayPrivate *dpyPriv = __glXInitialize(dpy);
 641    struct dri2_drawable *pdraw = (struct dri2_drawable *) base;
 642    struct dri2_display *pdp =
 643       (struct dri2_display *) dpyPriv->dri2Display;
 644    struct dri2_screen *psc = (struct dri2_screen *) base->psc;
 645    struct dri2_context *pcp = (struct dri2_context *) gc->driContext;
 646
 647    if (pdraw != NULL) {
 648
 649 #if __DRI2_FLUSH_VERSION >= 3
 650       if (!pdp->invalidateAvailable && psc->f)
 651          psc->f->invalidate(pdraw->driDrawable);
 652 #endif
 653
 654       if (psc->texBuffer->base.version >= 2 &&
 655           psc->texBuffer->setTexBuffer2 != NULL) {
 656          (*psc->texBuffer->setTexBuffer2) (pcp->driContext,
 657                                            pdraw->base.textureTarget,
 658                                            pdraw->base.textureFormat,
 659                                            pdraw->driDrawable);
 660       }
 661       else {
 662          (*psc->texBuffer->setTexBuffer) (pcp->driContext,
 663                                           pdraw->base.textureTarget,
 664                                           pdraw->driDrawable);
 665       }
 666    }
 667 }
 668
 669 static void
 670 dri2_release_tex_image(Display * dpy, GLXDrawable drawable, int buffer)
 671 {
 672 }
 673
 674 static const struct glx_context_vtable dri2_context_vtable = {
 675    dri2_bind_tex_image,
 676    dri2_release_tex_image,
 677 };
 678
 679 static void
 680 dri2BindExtensions(struct dri2_screen *psc, const __DRIextension **extensions)
 681 {
 682    int i;
 683
 684    __glXEnableDirectExtension(&psc->base, "GLX_SGI_video_sync");
 685    __glXEnableDirectExtension(&psc->base, "GLX_SGI_swap_control");
 686    __glXEnableDirectExtension(&psc->base, "GLX_MESA_swap_control");
 687    __glXEnableDirectExtension(&psc->base, "GLX_SGI_make_current_read");
 688
 689    /* FIXME: if DRI2 version supports it... */
 690    __glXEnableDirectExtension(&psc->base, "INTEL_swap_event");
 691
 692    for (i = 0; extensions[i]; i++) {
 693       if ((strcmp(extensions[i]->name, __DRI_TEX_BUFFER) == 0)) {
 694          psc->texBuffer = (__DRItexBufferExtension *) extensions[i];
 695          __glXEnableDirectExtension(&psc->base, "GLX_EXT_texture_from_pixmap");
 696       }
 697
 698       if ((strcmp(extensions[i]->name, __DRI2_FLUSH) == 0)) {
 699          psc->f = (__DRI2flushExtension *) extensions[i];
 700          /* internal driver extension, no GL extension exposed */
 701       }
 702
 703       if ((strcmp(extensions[i]->name, __DRI2_CONFIG_QUERY) == 0))
 704          psc->config = (__DRI2configQueryExtension *) extensions[i];
 705    }
 706 }
 707
 708
 709 static __GLXscreenConfigs *
 710 dri2CreateScreen(int screen, __GLXdisplayPrivate * priv)
 711 {
 712    const __DRIconfig **driver_configs;
 713    const __DRIextension **extensions;
 714    const struct dri2_display *const pdp = (struct dri2_display *)
 715       priv->dri2Display;
 716    struct dri2_screen *psc;
 717    __GLXDRIscreen *psp;
 718    char *driverName, *deviceName;
 719    drm_magic_t magic;
 720    int i;
 721
 722    psc = Xmalloc(sizeof *psc);
 723    if (psc == NULL)
 724       return NULL;
 725
 726    memset(psc, 0, sizeof *psc);
 727    if (!glx_screen_init(&psc->base, screen, priv))
 728        return NULL;
 729
 730    if (!DRI2Connect(priv->dpy, RootWindow(priv->dpy, screen),
 731                     &driverName, &deviceName)) {
 732       XFree(psc);
 733       return NULL;
 734    }
 735
 736    psc->driver = driOpenDriver(driverName);
 737    if (psc->driver == NULL) {
 738       ErrorMessageF("driver pointer missing\n");
 739       goto handle_error;
 740    }
 741
 742    extensions = dlsym(psc->driver, __DRI_DRIVER_EXTENSIONS);
 743    if (extensions == NULL) {
 744       ErrorMessageF("driver exports no extensions (%s)\n", dlerror());
 745       goto handle_error;
 746    }
 747
 748    for (i = 0; extensions[i]; i++) {
 749       if (strcmp(extensions[i]->name, __DRI_CORE) == 0)
 750          psc->core = (__DRIcoreExtension *) extensions[i];
 751       if (strcmp(extensions[i]->name, __DRI_DRI2) == 0)
 752          psc->dri2 = (__DRIdri2Extension *) extensions[i];
 753    }
 754
 755    if (psc->core == NULL || psc->dri2 == NULL) {
 756       ErrorMessageF("core dri or dri2 extension not found\n");
 757       goto handle_error;
 758    }
 759
 760    psc->fd = open(deviceName, O_RDWR);
 761    if (psc->fd < 0) {
 762       ErrorMessageF("failed to open drm device: %s\n", strerror(errno));
 763       goto handle_error;
 764    }
 765
 766    if (drmGetMagic(psc->fd, &magic)) {
 767       ErrorMessageF("failed to get magic\n");
 768       goto handle_error;
 769    }
 770
 771    if (!DRI2Authenticate(priv->dpy, RootWindow(priv->dpy, screen), magic)) {
 772       ErrorMessageF("failed to authenticate magic %d\n", magic);
 773       goto handle_error;
 774    }
 775
 776
 777    /* If the server does not support the protocol for
 778     * DRI2GetBuffersWithFormat, don't supply that interface to the driver.
 779     */
 780    psc->driScreen =
 781       psc->dri2->createNewScreen(screen, psc->fd,
 782                                  (const __DRIextension **)
 783                                  &pdp->loader_extensions[0],
 784                                  &driver_configs, psc);
 785
 786    if (psc->driScreen == NULL) {
 787       ErrorMessageF("failed to create dri screen\n");
 788       goto handle_error;
 789    }
 790
 791    extensions = psc->core->getExtensions(psc->driScreen);
 792    dri2BindExtensions(psc, extensions);
 793
 794    psc->base.configs =
 795       driConvertConfigs(psc->core, psc->base.configs, driver_configs);
 796    psc->base.visuals =
 797       driConvertConfigs(psc->core, psc->base.visuals, driver_configs);
 798
 799    psc->driver_configs = driver_configs;
 800
 801    psp = &psc->vtable;
 802    psc->base.driScreen = psp;
 803    psp->destroyScreen = dri2DestroyScreen;
 804    psp->createContext = dri2CreateContext;
 805    psp->createDrawable = dri2CreateDrawable;
 806    psp->swapBuffers = dri2SwapBuffers;
 807    psp->waitGL = dri2WaitGL;
 808    psp->waitX = dri2WaitX;
 809    psp->getDrawableMSC = NULL;
 810    psp->waitForMSC = NULL;
 811    psp->waitForSBC = NULL;
 812    psp->setSwapInterval = NULL;
 813    psp->getSwapInterval = NULL;
 814
 815    if (pdp->driMinor >= 2) {
 816 #ifdef X_DRI2GetMSC
 817       psp->getDrawableMSC = dri2DrawableGetMSC;
 818 #endif
 819 #ifdef X_DRI2WaitMSC
 820       psp->waitForMSC = dri2WaitForMSC;
 821       psp->waitForSBC = dri2WaitForSBC;
 822 #endif
 823 #ifdef X_DRI2SwapInterval
 824       psp->setSwapInterval = dri2SetSwapInterval;
 825       psp->getSwapInterval = dri2GetSwapInterval;
 826 #endif
 827 #if defined(X_DRI2GetMSC) && defined(X_DRI2WaitMSC) && defined(X_DRI2SwapInterval)
 828       __glXEnableDirectExtension(&psc->base, "GLX_OML_sync_control");
 829 #endif
 830    }
 831
 832    /* DRI2 suports SubBuffer through DRI2CopyRegion, so it's always
 833     * available.*/
 834    psp->copySubBuffer = dri2CopySubBuffer;
 835    __glXEnableDirectExtension(&psc->base, "GLX_MESA_copy_sub_buffer");
 836
 837    Xfree(driverName);
 838    Xfree(deviceName);
 839
 840    return &psc->base;
 841
 842 handle_error:
 843    Xfree(driverName);
 844    Xfree(deviceName);
 845    XFree(psc);
 846
 847    /* FIXME: clean up here */
 848
 849    return NULL;
 850 }
 851
 852 /* Called from __glXFreeDisplayPrivate.
 853  */
 854 static void
 855 dri2DestroyDisplay(__GLXDRIdisplay * dpy)
 856 {
 857    Xfree(dpy);
 858 }
 859
 860 _X_HIDDEN __GLXDRIdrawable *
 861 dri2GetGlxDrawableFromXDrawableId(Display *dpy, XID id)
 862 {
 863    __GLXdisplayPrivate *d = __glXInitialize(dpy);
 864    struct dri2_display *pdp = (struct dri2_display *) d->dri2Display;
 865    __GLXDRIdrawable *pdraw;
 866
 867    if (__glxHashLookup(pdp->dri2Hash, id, (void *) &pdraw) == 0)
 868       return pdraw;
 869
 870    return NULL;
 871 }
 872
 873 /*
 874  * Allocate, initialize and return a __DRIdisplayPrivate object.
 875  * This is called from __glXInitialize() when we are given a new
 876  * display pointer.
 877  */
 878 _X_HIDDEN __GLXDRIdisplay *
 879 dri2CreateDisplay(Display * dpy)
 880 {
 881    struct dri2_display *pdp;
 882    int eventBase, errorBase, i;
 883
 884    if (!DRI2QueryExtension(dpy, &eventBase, &errorBase))
 885       return NULL;
 886
 887    pdp = Xmalloc(sizeof *pdp);
 888    if (pdp == NULL)
 889       return NULL;
 890
 891    if (!DRI2QueryVersion(dpy, &pdp->driMajor, &pdp->driMinor)) {
 892       Xfree(pdp);
 893       return NULL;
 894    }
 895
 896    pdp->driPatch = 0;
 897    pdp->swapAvailable = (pdp->driMinor >= 2);
 898    pdp->invalidateAvailable = (pdp->driMinor >= 3);
 899
 900    pdp->base.destroyDisplay = dri2DestroyDisplay;
 901    pdp->base.createScreen = dri2CreateScreen;
 902
 903    i = 0;
 904    if (pdp->driMinor < 1)
 905       pdp->loader_extensions[i++] = &dri2LoaderExtension_old.base;
 906    else
 907       pdp->loader_extensions[i++] = &dri2LoaderExtension.base;
 908
 909    pdp->loader_extensions[i++] = &systemTimeExtension.base;
 910
 911 #ifdef __DRI_USE_INVALIDATE
 912    pdp->loader_extensions[i++] = &dri2UseInvalidate.base;
 913 #endif
 914    pdp->loader_extensions[i++] = NULL;
 915
 916    pdp->dri2Hash = __glxHashCreate();
 917    if (pdp->dri2Hash == NULL) {
 918       Xfree(pdp);
 919       return NULL;
 920    }
 921
 922    return &pdp->base;
 923 }
 924
 925 #endif /* GLX_DIRECT_RENDERING */