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