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    struct glx_screen 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    struct glx_context base;
  98    __DRIcontext *driContext;
  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 const struct glx_context_vtable dri2_context_vtable;
 114
 115 static void
 116 dri2_destroy_context(struct glx_context *context)
 117 {
 118    struct dri2_context *pcp = (struct dri2_context *) context;
 119    struct dri2_screen *psc = (struct dri2_screen *) context->psc;
 120
 121    driReleaseDrawables(&pcp->base);
 122
 123    if (context->xid)
 124       glx_send_destroy_context(psc->base.dpy, context->xid);
 125
 126    if (context->extensions)
 127       XFree((char *) context->extensions);
 128
 129    (*psc->core->destroyContext) (pcp->driContext);
 130
 131    Xfree(pcp);
 132 }
 133
 134 static Bool
 135 dri2_bind_context(struct glx_context *context, struct glx_context *old,
 136                   GLXDrawable draw, GLXDrawable read)
 137 {
 138    struct dri2_context *pcp = (struct dri2_context *) context;
 139    struct dri2_screen *psc = (struct dri2_screen *) pcp->base.psc;
 140    struct dri2_drawable *pdraw, *pread;
 141    struct dri2_display *pdp;
 142
 143    pdraw = (struct dri2_drawable *) driFetchDrawable(context, draw);
 144    pread = (struct dri2_drawable *) driFetchDrawable(context, read);
 145
 146    if (pdraw == NULL || pread == NULL)
 147       return GLXBadDrawable;
 148
 149    if (!(*psc->core->bindContext) (pcp->driContext,
 150                                    pdraw->driDrawable, pread->driDrawable))
 151       return GLXBadContext;
 152
 153    /* If the server doesn't send invalidate events, we may miss a
 154     * resize before the rendering starts.  Invalidate the buffers now
 155     * so the driver will recheck before rendering starts. */
 156    pdp = (struct dri2_display *) psc->base.display;
 157    if (!pdp->invalidateAvailable) {
 158       dri2InvalidateBuffers(psc->base.dpy, pdraw->base.xDrawable);
 159       if (pread != pdraw)
 160          dri2InvalidateBuffers(psc->base.dpy, pread->base.xDrawable);
 161    }
 162
 163    return Success;
 164 }
 165
 166 static void
 167 dri2_unbind_context(struct glx_context *context, struct glx_context *new)
 168 {
 169    struct dri2_context *pcp = (struct dri2_context *) context;
 170    struct dri2_screen *psc = (struct dri2_screen *) pcp->base.psc;
 171
 172    (*psc->core->unbindContext) (pcp->driContext);
 173
 174    if (context == new)
 175       driReleaseDrawables(&pcp->base);
 176 }
 177
 178 static struct glx_context *
 179 dri2_create_context(struct glx_screen *base,
 180                     struct glx_config *config_base,
 181                     struct glx_context *shareList, int renderType)
 182 {
 183    struct dri2_context *pcp, *pcp_shared;
 184    struct dri2_screen *psc = (struct dri2_screen *) base;
 185    __GLXDRIconfigPrivate *config = (__GLXDRIconfigPrivate *) config_base;
 186    __DRIcontext *shared = NULL;
 187
 188    if (shareList) {
 189       pcp_shared = (struct dri2_context *) shareList;
 190       shared = pcp_shared->driContext;
 191    }
 192
 193    pcp = Xmalloc(sizeof *pcp);
 194    if (pcp == NULL)
 195       return NULL;
 196
 197    memset(pcp, 0, sizeof *pcp);
 198    if (!glx_context_init(&pcp->base, &psc->base, &config->base)) {
 199       Xfree(pcp);
 200       return NULL;
 201    }
 202
 203    pcp->driContext =
 204       (*psc->dri2->createNewContext) (psc->driScreen,
 205                                       config->driConfig, shared, pcp);
 206
 207    if (pcp->driContext == NULL) {
 208       Xfree(pcp);
 209       return NULL;
 210    }
 211
 212    pcp->base.vtable = &dri2_context_vtable;
 213
 214    return &pcp->base;
 215 }
 216
 217 static void
 218 dri2DestroyDrawable(__GLXDRIdrawable *base)
 219 {
 220    struct dri2_screen *psc = (struct dri2_screen *) base->psc;
 221    struct dri2_drawable *pdraw = (struct dri2_drawable *) base;
 222    struct glx_display *dpyPriv = psc->base.display;
 223    struct dri2_display *pdp = (struct dri2_display *)dpyPriv->dri2Display;
 224
 225    __glxHashDelete(pdp->dri2Hash, pdraw->base.xDrawable);
 226    (*psc->core->destroyDrawable) (pdraw->driDrawable);
 227
 228    /* If it's a GLX 1.3 drawables, we can destroy the DRI2 drawable
 229     * now, as the application explicitly asked to destroy the GLX
 230     * drawable.  Otherwise, for legacy drawables, we let the DRI2
 231     * drawable linger on the server, since there's no good way of
 232     * knowing when the application is done with it.  The server will
 233     * destroy the DRI2 drawable when it destroys the X drawable or the
 234     * client exits anyway. */
 235    if (pdraw->base.xDrawable != pdraw->base.drawable)
 236       DRI2DestroyDrawable(psc->base.dpy, pdraw->base.xDrawable);
 237
 238    Xfree(pdraw);
 239 }
 240
 241 static __GLXDRIdrawable *
 242 dri2CreateDrawable(struct glx_screen *base, XID xDrawable,
 243                    GLXDrawable drawable, struct glx_config *config_base)
 244 {
 245    struct dri2_drawable *pdraw;
 246    struct dri2_screen *psc = (struct dri2_screen *) base;
 247    __GLXDRIconfigPrivate *config = (__GLXDRIconfigPrivate *) config_base;
 248    struct glx_display *dpyPriv;
 249    struct dri2_display *pdp;
 250    GLint vblank_mode = DRI_CONF_VBLANK_DEF_INTERVAL_1;
 251
 252    pdraw = Xmalloc(sizeof(*pdraw));
 253    if (!pdraw)
 254       return NULL;
 255
 256    memset(pdraw, 0, sizeof *pdraw);
 257    pdraw->base.destroyDrawable = dri2DestroyDrawable;
 258    pdraw->base.xDrawable = xDrawable;
 259    pdraw->base.drawable = drawable;
 260    pdraw->base.psc = &psc->base;
 261    pdraw->bufferCount = 0;
 262    pdraw->swap_interval = 1; /* default may be overridden below */
 263    pdraw->have_back = 0;
 264
 265    if (psc->config)
 266       psc->config->configQueryi(psc->driScreen,
 267                                 "vblank_mode", &vblank_mode);
 268
 269    switch (vblank_mode) {
 270    case DRI_CONF_VBLANK_NEVER:
 271    case DRI_CONF_VBLANK_DEF_INTERVAL_0:
 272       pdraw->swap_interval = 0;
 273       break;
 274    case DRI_CONF_VBLANK_DEF_INTERVAL_1:
 275    case DRI_CONF_VBLANK_ALWAYS_SYNC:
 276    default:
 277       pdraw->swap_interval = 1;
 278       break;
 279    }
 280
 281    DRI2CreateDrawable(psc->base.dpy, xDrawable);
 282
 283    dpyPriv = __glXInitialize(psc->base.dpy);
 284    pdp = (struct dri2_display *)dpyPriv->dri2Display;;
 285    /* Create a new drawable */
 286    pdraw->driDrawable =
 287       (*psc->dri2->createNewDrawable) (psc->driScreen,
 288                                        config->driConfig, pdraw);
 289
 290    if (!pdraw->driDrawable) {
 291       DRI2DestroyDrawable(psc->base.dpy, xDrawable);
 292       Xfree(pdraw);
 293       return NULL;
 294    }
 295
 296    if (__glxHashInsert(pdp->dri2Hash, xDrawable, pdraw)) {
 297       (*psc->core->destroyDrawable) (pdraw->driDrawable);
 298       DRI2DestroyDrawable(psc->base.dpy, xDrawable);
 299       Xfree(pdraw);
 300       return None;
 301    }
 302
 303
 304 #ifdef X_DRI2SwapInterval
 305    /*
 306     * Make sure server has the same swap interval we do for the new
 307     * drawable.
 308     */
 309    if (pdp->swapAvailable)
 310       DRI2SwapInterval(psc->base.dpy, xDrawable, pdraw->swap_interval);
 311 #endif
 312
 313    return &pdraw->base;
 314 }
 315
 316 #ifdef X_DRI2GetMSC
 317
 318 static int
 319 dri2DrawableGetMSC(struct glx_screen *psc, __GLXDRIdrawable *pdraw,
 320                    int64_t *ust, int64_t *msc, int64_t *sbc)
 321 {
 322    CARD64 dri2_ust, dri2_msc, dri2_sbc;
 323    int ret;
 324
 325    ret = DRI2GetMSC(psc->dpy, pdraw->xDrawable,
 326                     &dri2_ust, &dri2_msc, &dri2_sbc);
 327    *ust = dri2_ust;
 328    *msc = dri2_msc;
 329    *sbc = dri2_sbc;
 330
 331    return ret;
 332 }
 333
 334 #endif
 335
 336
 337 #ifdef X_DRI2WaitMSC
 338
 339 static int
 340 dri2WaitForMSC(__GLXDRIdrawable *pdraw, int64_t target_msc, int64_t divisor,
 341                int64_t remainder, int64_t *ust, int64_t *msc, int64_t *sbc)
 342 {
 343    CARD64 dri2_ust, dri2_msc, dri2_sbc;
 344    int ret;
 345
 346    ret = DRI2WaitMSC(pdraw->psc->dpy, pdraw->xDrawable, target_msc, divisor,
 347                      remainder, &dri2_ust, &dri2_msc, &dri2_sbc);
 348    *ust = dri2_ust;
 349    *msc = dri2_msc;
 350    *sbc = dri2_sbc;
 351
 352    return ret;
 353 }
 354
 355 static int
 356 dri2WaitForSBC(__GLXDRIdrawable *pdraw, int64_t target_sbc, int64_t *ust,
 357                int64_t *msc, int64_t *sbc)
 358 {
 359    CARD64 dri2_ust, dri2_msc, dri2_sbc;
 360    int ret;
 361
 362    ret = DRI2WaitSBC(pdraw->psc->dpy, pdraw->xDrawable,
 363                      target_sbc, &dri2_ust, &dri2_msc, &dri2_sbc);
 364    *ust = dri2_ust;
 365    *msc = dri2_msc;
 366    *sbc = dri2_sbc;
 367
 368    return ret;
 369 }
 370
 371 #endif /* X_DRI2WaitMSC */
 372
 373 static void
 374 dri2CopySubBuffer(__GLXDRIdrawable *pdraw, int x, int y, int width, int height)
 375 {
 376    struct dri2_drawable *priv = (struct dri2_drawable *) pdraw;
 377    struct dri2_screen *psc = (struct dri2_screen *) pdraw->psc;
 378    XRectangle xrect;
 379    XserverRegion region;
 380
 381    /* Check we have the right attachments */
 382    if (!priv->have_back)
 383       return;
 384
 385    xrect.x = x;
 386    xrect.y = priv->height - y - height;
 387    xrect.width = width;
 388    xrect.height = height;
 389
 390 #ifdef __DRI2_FLUSH
 391    if (psc->f)
 392       (*psc->f->flush) (priv->driDrawable);
 393 #endif
 394
 395    region = XFixesCreateRegion(psc->base.dpy, &xrect, 1);
 396    DRI2CopyRegion(psc->base.dpy, pdraw->xDrawable, region,
 397                   DRI2BufferFrontLeft, DRI2BufferBackLeft);
 398
 399    /* Refresh the fake front (if present) after we just damaged the real
 400     * front.
 401     */
 402    if (priv->have_fake_front)
 403       DRI2CopyRegion(psc->base.dpy, pdraw->xDrawable, region,
 404                      DRI2BufferFakeFrontLeft, DRI2BufferFrontLeft);
 405
 406    XFixesDestroyRegion(psc->base.dpy, region);
 407 }
 408
 409 static void
 410 dri2_copy_drawable(struct dri2_drawable *priv, int dest, int src)
 411 {
 412    XRectangle xrect;
 413    XserverRegion region;
 414    struct dri2_screen *psc = (struct dri2_screen *) priv->base.psc;
 415
 416    xrect.x = 0;
 417    xrect.y = 0;
 418    xrect.width = priv->width;
 419    xrect.height = priv->height;
 420
 421 #ifdef __DRI2_FLUSH
 422    if (psc->f)
 423       (*psc->f->flush) (priv->driDrawable);
 424 #endif
 425
 426    region = XFixesCreateRegion(psc->base.dpy, &xrect, 1);
 427    DRI2CopyRegion(psc->base.dpy, priv->base.xDrawable, region, dest, src);
 428    XFixesDestroyRegion(psc->base.dpy, region);
 429
 430 }
 431
 432 static void
 433 dri2_wait_x(struct glx_context *gc)
 434 {
 435    struct dri2_drawable *priv = (struct dri2_drawable *)
 436       GetGLXDRIDrawable(gc->currentDpy, gc->currentDrawable);
 437
 438    if (priv == NULL || !priv->have_fake_front)
 439       return;
 440
 441    dri2_copy_drawable(priv, DRI2BufferFakeFrontLeft, DRI2BufferFrontLeft);
 442 }
 443
 444 static void
 445 dri2_wait_gl(struct glx_context *gc)
 446 {
 447    struct dri2_drawable *priv = (struct dri2_drawable *)
 448       GetGLXDRIDrawable(gc->currentDpy, gc->currentDrawable);
 449
 450    if (priv == NULL || !priv->have_fake_front)
 451       return;
 452
 453    dri2_copy_drawable(priv, DRI2BufferFrontLeft, DRI2BufferFakeFrontLeft);
 454 }
 455
 456 static void
 457 dri2FlushFrontBuffer(__DRIdrawable *driDrawable, void *loaderPrivate)
 458 {
 459    struct dri2_drawable *pdraw = loaderPrivate;
 460    struct glx_display *priv = __glXInitialize(pdraw->base.psc->dpy);
 461    struct dri2_display *pdp = (struct dri2_display *)priv->dri2Display;
 462    struct glx_context *gc = __glXGetCurrentContext();
 463
 464    /* Old servers don't send invalidate events */
 465    if (!pdp->invalidateAvailable)
 466        dri2InvalidateBuffers(priv->dpy, pdraw->base.xDrawable);
 467
 468    dri2_wait_gl(gc);
 469 }
 470
 471
 472 static void
 473 dri2DestroyScreen(struct glx_screen *base)
 474 {
 475    struct dri2_screen *psc = (struct dri2_screen *) base;
 476
 477    /* Free the direct rendering per screen data */
 478    (*psc->core->destroyScreen) (psc->driScreen);
 479    driDestroyConfigs(psc->driver_configs);
 480    close(psc->fd);
 481    Xfree(psc);
 482 }
 483
 484 /**
 485  * Process list of buffer received from the server
 486  *
 487  * Processes the list of buffers received in a reply from the server to either
 488  * \c DRI2GetBuffers or \c DRI2GetBuffersWithFormat.
 489  */
 490 static void
 491 process_buffers(struct dri2_drawable * pdraw, DRI2Buffer * buffers,
 492                 unsigned count)
 493 {
 494    int i;
 495
 496    pdraw->bufferCount = count;
 497    pdraw->have_fake_front = 0;
 498    pdraw->have_back = 0;
 499
 500    /* This assumes the DRI2 buffer attachment tokens matches the
 501     * __DRIbuffer tokens. */
 502    for (i = 0; i < count; i++) {
 503       pdraw->buffers[i].attachment = buffers[i].attachment;
 504       pdraw->buffers[i].name = buffers[i].name;
 505       pdraw->buffers[i].pitch = buffers[i].pitch;
 506       pdraw->buffers[i].cpp = buffers[i].cpp;
 507       pdraw->buffers[i].flags = buffers[i].flags;
 508       if (pdraw->buffers[i].attachment == __DRI_BUFFER_FAKE_FRONT_LEFT)
 509          pdraw->have_fake_front = 1;
 510       if (pdraw->buffers[i].attachment == __DRI_BUFFER_BACK_LEFT)
 511          pdraw->have_back = 1;
 512    }
 513
 514 }
 515
 516 unsigned dri2GetSwapEventType(Display* dpy, XID drawable)
 517 {
 518       struct glx_display *glx_dpy = __glXInitialize(dpy);
 519       __GLXDRIdrawable *pdraw;
 520       pdraw = dri2GetGlxDrawableFromXDrawableId(dpy, drawable);
 521       if (!pdraw || !(pdraw->eventMask & GLX_BUFFER_SWAP_COMPLETE_INTEL_MASK))
 522          return 0;
 523       return glx_dpy->codes->first_event + GLX_BufferSwapComplete;
 524 }
 525
 526 static int64_t
 527 dri2SwapBuffers(__GLXDRIdrawable *pdraw, int64_t target_msc, int64_t divisor,
 528                 int64_t remainder)
 529 {
 530     struct dri2_drawable *priv = (struct dri2_drawable *) pdraw;
 531     struct glx_display *dpyPriv = __glXInitialize(priv->base.psc->dpy);
 532     struct dri2_screen *psc = (struct dri2_screen *) priv->base.psc;
 533     struct dri2_display *pdp =
 534         (struct dri2_display *)dpyPriv->dri2Display;
 535     CARD64 ret = 0;
 536
 537 #ifdef __DRI2_FLUSH
 538     if (psc->f)
 539         (*psc->f->flush)(priv->driDrawable);
 540 #endif
 541
 542     /* Old servers don't send invalidate events */
 543     if (!pdp->invalidateAvailable)
 544        dri2InvalidateBuffers(dpyPriv->dpy, pdraw->xDrawable);
 545
 546     /* Old servers can't handle swapbuffers */
 547     if (!pdp->swapAvailable) {
 548        dri2CopySubBuffer(pdraw, 0, 0, priv->width, priv->height);
 549        return 0;
 550     }
 551
 552 #ifdef X_DRI2SwapBuffers
 553     DRI2SwapBuffers(psc->base.dpy, pdraw->xDrawable, target_msc, divisor,
 554                     remainder, &ret);
 555 #endif
 556
 557     return ret;
 558 }
 559
 560 static __DRIbuffer *
 561 dri2GetBuffers(__DRIdrawable * driDrawable,
 562                int *width, int *height,
 563                unsigned int *attachments, int count,
 564                int *out_count, void *loaderPrivate)
 565 {
 566    struct dri2_drawable *pdraw = loaderPrivate;
 567    DRI2Buffer *buffers;
 568
 569    buffers = DRI2GetBuffers(pdraw->base.psc->dpy, pdraw->base.xDrawable,
 570                             width, height, attachments, count, out_count);
 571    if (buffers == NULL)
 572       return NULL;
 573
 574    pdraw->width = *width;
 575    pdraw->height = *height;
 576    process_buffers(pdraw, buffers, *out_count);
 577
 578    Xfree(buffers);
 579
 580    return pdraw->buffers;
 581 }
 582
 583 static __DRIbuffer *
 584 dri2GetBuffersWithFormat(__DRIdrawable * driDrawable,
 585                          int *width, int *height,
 586                          unsigned int *attachments, int count,
 587                          int *out_count, void *loaderPrivate)
 588 {
 589    struct dri2_drawable *pdraw = loaderPrivate;
 590    DRI2Buffer *buffers;
 591
 592    buffers = DRI2GetBuffersWithFormat(pdraw->base.psc->dpy,
 593                                       pdraw->base.xDrawable,
 594                                       width, height, attachments,
 595                                       count, out_count);
 596    if (buffers == NULL)
 597       return NULL;
 598
 599    pdraw->width = *width;
 600    pdraw->height = *height;
 601    process_buffers(pdraw, buffers, *out_count);
 602
 603    Xfree(buffers);
 604
 605    return pdraw->buffers;
 606 }
 607
 608 #ifdef X_DRI2SwapInterval
 609
 610 static int
 611 dri2SetSwapInterval(__GLXDRIdrawable *pdraw, int interval)
 612 {
 613    struct dri2_drawable *priv =  (struct dri2_drawable *) pdraw;
 614    GLint vblank_mode = DRI_CONF_VBLANK_DEF_INTERVAL_1;
 615    struct dri2_screen *psc = (struct dri2_screen *) priv->base.psc;
 616
 617    if (psc->config)
 618       psc->config->configQueryi(psc->driScreen,
 619                                 "vblank_mode", &vblank_mode);
 620
 621    switch (vblank_mode) {
 622    case DRI_CONF_VBLANK_NEVER:
 623       return GLX_BAD_VALUE;
 624    case DRI_CONF_VBLANK_ALWAYS_SYNC:
 625       if (interval <= 0)
 626          return GLX_BAD_VALUE;
 627       break;
 628    default:
 629       break;
 630    }
 631
 632    DRI2SwapInterval(priv->base.psc->dpy, priv->base.xDrawable, interval);
 633    priv->swap_interval = interval;
 634
 635    return 0;
 636 }
 637
 638 static int
 639 dri2GetSwapInterval(__GLXDRIdrawable *pdraw)
 640 {
 641    struct dri2_drawable *priv =  (struct dri2_drawable *) pdraw;
 642
 643   return priv->swap_interval;
 644 }
 645
 646 #endif /* X_DRI2SwapInterval */
 647
 648 static const __DRIdri2LoaderExtension dri2LoaderExtension = {
 649    {__DRI_DRI2_LOADER, __DRI_DRI2_LOADER_VERSION},
 650    dri2GetBuffers,
 651    dri2FlushFrontBuffer,
 652    dri2GetBuffersWithFormat,
 653 };
 654
 655 static const __DRIdri2LoaderExtension dri2LoaderExtension_old = {
 656    {__DRI_DRI2_LOADER, __DRI_DRI2_LOADER_VERSION},
 657    dri2GetBuffers,
 658    dri2FlushFrontBuffer,
 659    NULL,
 660 };
 661
 662 #ifdef __DRI_USE_INVALIDATE
 663 static const __DRIuseInvalidateExtension dri2UseInvalidate = {
 664    { __DRI_USE_INVALIDATE, __DRI_USE_INVALIDATE_VERSION }
 665 };
 666 #endif
 667
 668 _X_HIDDEN void
 669 dri2InvalidateBuffers(Display *dpy, XID drawable)
 670 {
 671    __GLXDRIdrawable *pdraw =
 672       dri2GetGlxDrawableFromXDrawableId(dpy, drawable);
 673    struct dri2_screen *psc = (struct dri2_screen *) pdraw->psc;
 674    struct dri2_drawable *pdp = (struct dri2_drawable *) pdraw;
 675
 676 #if __DRI2_FLUSH_VERSION >= 3
 677    if (pdraw && psc->f)
 678        psc->f->invalidate(pdp->driDrawable);
 679 #endif
 680 }
 681
 682 static void
 683 dri2_bind_tex_image(Display * dpy,
 684                     GLXDrawable drawable,
 685                     int buffer, const int *attrib_list)
 686 {
 687    struct glx_context *gc = __glXGetCurrentContext();
 688    struct dri2_context *pcp = (struct dri2_context *) gc;
 689    __GLXDRIdrawable *base = GetGLXDRIDrawable(dpy, drawable);
 690    struct glx_display *dpyPriv = __glXInitialize(dpy);
 691    struct dri2_drawable *pdraw = (struct dri2_drawable *) base;
 692    struct dri2_display *pdp =
 693       (struct dri2_display *) dpyPriv->dri2Display;
 694    struct dri2_screen *psc;
 695
 696    if (pdraw != NULL) {
 697       psc = (struct dri2_screen *) base->psc;
 698
 699 #if __DRI2_FLUSH_VERSION >= 3
 700       if (!pdp->invalidateAvailable && psc->f)
 701          psc->f->invalidate(pdraw->driDrawable);
 702 #endif
 703
 704       if (psc->texBuffer->base.version >= 2 &&
 705           psc->texBuffer->setTexBuffer2 != NULL) {
 706          (*psc->texBuffer->setTexBuffer2) (pcp->driContext,
 707                                            pdraw->base.textureTarget,
 708                                            pdraw->base.textureFormat,
 709                                            pdraw->driDrawable);
 710       }
 711       else {
 712          (*psc->texBuffer->setTexBuffer) (pcp->driContext,
 713                                           pdraw->base.textureTarget,
 714                                           pdraw->driDrawable);
 715       }
 716    }
 717 }
 718
 719 static void
 720 dri2_release_tex_image(Display * dpy, GLXDrawable drawable, int buffer)
 721 {
 722 #if __DRI_TEX_BUFFER_VERSION >= 3
 723    struct glx_context *gc = __glXGetCurrentContext();
 724    struct dri2_context *pcp = (struct dri2_context *) gc;
 725    __GLXDRIdrawable *base = GetGLXDRIDrawable(dpy, drawable);
 726    struct glx_display *dpyPriv = __glXInitialize(dpy);
 727    struct dri2_drawable *pdraw = (struct dri2_drawable *) base;
 728    struct dri2_display *pdp =
 729       (struct dri2_display *) dpyPriv->dri2Display;
 730    struct dri2_screen *psc;
 731
 732    if (pdraw != NULL) {
 733       psc = (struct dri2_screen *) base->psc;
 734
 735       if (psc->texBuffer->base.version >= 3 &&
 736           psc->texBuffer->releaseTexBuffer != NULL) {
 737          (*psc->texBuffer->releaseTexBuffer) (pcp->driContext,
 738                                            pdraw->base.textureTarget,
 739                                            pdraw->driDrawable);
 740       }
 741    }
 742 #endif
 743 }
 744
 745 static const struct glx_context_vtable dri2_context_vtable = {
 746    dri2_destroy_context,
 747    dri2_bind_context,
 748    dri2_unbind_context,
 749    dri2_wait_gl,
 750    dri2_wait_x,
 751    DRI_glXUseXFont,
 752    dri2_bind_tex_image,
 753    dri2_release_tex_image,
 754 };
 755
 756 static void
 757 dri2BindExtensions(struct dri2_screen *psc, const __DRIextension **extensions)
 758 {
 759    int i;
 760
 761    __glXEnableDirectExtension(&psc->base, "GLX_SGI_video_sync");
 762    __glXEnableDirectExtension(&psc->base, "GLX_SGI_swap_control");
 763    __glXEnableDirectExtension(&psc->base, "GLX_MESA_swap_control");
 764    __glXEnableDirectExtension(&psc->base, "GLX_SGI_make_current_read");
 765
 766    /* FIXME: if DRI2 version supports it... */
 767    __glXEnableDirectExtension(&psc->base, "INTEL_swap_event");
 768
 769    for (i = 0; extensions[i]; i++) {
 770       if ((strcmp(extensions[i]->name, __DRI_TEX_BUFFER) == 0)) {
 771          psc->texBuffer = (__DRItexBufferExtension *) extensions[i];
 772          __glXEnableDirectExtension(&psc->base, "GLX_EXT_texture_from_pixmap");
 773       }
 774
 775       if ((strcmp(extensions[i]->name, __DRI2_FLUSH) == 0)) {
 776          psc->f = (__DRI2flushExtension *) extensions[i];
 777          /* internal driver extension, no GL extension exposed */
 778       }
 779
 780       if ((strcmp(extensions[i]->name, __DRI2_CONFIG_QUERY) == 0))
 781          psc->config = (__DRI2configQueryExtension *) extensions[i];
 782    }
 783 }
 784
 785 static const struct glx_screen_vtable dri2_screen_vtable = {
 786    dri2_create_context
 787 };
 788
 789 static struct glx_screen *
 790 dri2CreateScreen(int screen, struct glx_display * priv)
 791 {
 792    const __DRIconfig **driver_configs;
 793    const __DRIextension **extensions;
 794    const struct dri2_display *const pdp = (struct dri2_display *)
 795       priv->dri2Display;
 796    struct dri2_screen *psc;
 797    __GLXDRIscreen *psp;
 798    char *driverName, *deviceName;
 799    drm_magic_t magic;
 800    int i;
 801
 802    psc = Xmalloc(sizeof *psc);
 803    if (psc == NULL)
 804       return NULL;
 805
 806    memset(psc, 0, sizeof *psc);
 807    psc->fd = -1;
 808
 809    if (!glx_screen_init(&psc->base, screen, priv)) {
 810       Xfree(psc);
 811       return NULL;
 812    }
 813
 814    if (!DRI2Connect(priv->dpy, RootWindow(priv->dpy, screen),
 815                     &driverName, &deviceName)) {
 816       glx_screen_cleanup(&psc->base);
 817       XFree(psc);
 818       return NULL;
 819    }
 820
 821    psc->driver = driOpenDriver(driverName);
 822    if (psc->driver == NULL) {
 823       ErrorMessageF("driver pointer missing\n");
 824       goto handle_error;
 825    }
 826
 827    extensions = dlsym(psc->driver, __DRI_DRIVER_EXTENSIONS);
 828    if (extensions == NULL) {
 829       ErrorMessageF("driver exports no extensions (%s)\n", dlerror());
 830       goto handle_error;
 831    }
 832
 833    for (i = 0; extensions[i]; i++) {
 834       if (strcmp(extensions[i]->name, __DRI_CORE) == 0)
 835          psc->core = (__DRIcoreExtension *) extensions[i];
 836       if (strcmp(extensions[i]->name, __DRI_DRI2) == 0)
 837          psc->dri2 = (__DRIdri2Extension *) extensions[i];
 838    }
 839
 840    if (psc->core == NULL || psc->dri2 == NULL) {
 841       ErrorMessageF("core dri or dri2 extension not found\n");
 842       goto handle_error;
 843    }
 844
 845    psc->fd = open(deviceName, O_RDWR);
 846    if (psc->fd < 0) {
 847       ErrorMessageF("failed to open drm device: %s\n", strerror(errno));
 848       goto handle_error;
 849    }
 850
 851    if (drmGetMagic(psc->fd, &magic)) {
 852       ErrorMessageF("failed to get magic\n");
 853       goto handle_error;
 854    }
 855
 856    if (!DRI2Authenticate(priv->dpy, RootWindow(priv->dpy, screen), magic)) {
 857       ErrorMessageF("failed to authenticate magic %d\n", magic);
 858       goto handle_error;
 859    }
 860
 861
 862    /* If the server does not support the protocol for
 863     * DRI2GetBuffersWithFormat, don't supply that interface to the driver.
 864     */
 865    psc->driScreen =
 866       psc->dri2->createNewScreen(screen, psc->fd,
 867                                  (const __DRIextension **)
 868                                  &pdp->loader_extensions[0],
 869                                  &driver_configs, psc);
 870
 871    if (psc->driScreen == NULL) {
 872       ErrorMessageF("failed to create dri screen\n");
 873       goto handle_error;
 874    }
 875
 876    extensions = psc->core->getExtensions(psc->driScreen);
 877    dri2BindExtensions(psc, extensions);
 878
 879    psc->base.configs =
 880       driConvertConfigs(psc->core, psc->base.configs, driver_configs);
 881    psc->base.visuals =
 882       driConvertConfigs(psc->core, psc->base.visuals, driver_configs);
 883
 884    psc->driver_configs = driver_configs;
 885
 886    psc->base.vtable = &dri2_screen_vtable;
 887    psp = &psc->vtable;
 888    psc->base.driScreen = psp;
 889    psp->destroyScreen = dri2DestroyScreen;
 890    psp->createDrawable = dri2CreateDrawable;
 891    psp->swapBuffers = dri2SwapBuffers;
 892    psp->getDrawableMSC = NULL;
 893    psp->waitForMSC = NULL;
 894    psp->waitForSBC = NULL;
 895    psp->setSwapInterval = NULL;
 896    psp->getSwapInterval = NULL;
 897
 898    if (pdp->driMinor >= 2) {
 899 #ifdef X_DRI2GetMSC
 900       psp->getDrawableMSC = dri2DrawableGetMSC;
 901 #endif
 902 #ifdef X_DRI2WaitMSC
 903       psp->waitForMSC = dri2WaitForMSC;
 904       psp->waitForSBC = dri2WaitForSBC;
 905 #endif
 906 #ifdef X_DRI2SwapInterval
 907       psp->setSwapInterval = dri2SetSwapInterval;
 908       psp->getSwapInterval = dri2GetSwapInterval;
 909 #endif
 910 #if defined(X_DRI2GetMSC) && defined(X_DRI2WaitMSC) && defined(X_DRI2SwapInterval)
 911       __glXEnableDirectExtension(&psc->base, "GLX_OML_sync_control");
 912 #endif
 913    }
 914
 915    /* DRI2 suports SubBuffer through DRI2CopyRegion, so it's always
 916     * available.*/
 917    psp->copySubBuffer = dri2CopySubBuffer;
 918    __glXEnableDirectExtension(&psc->base, "GLX_MESA_copy_sub_buffer");
 919
 920    Xfree(driverName);
 921    Xfree(deviceName);
 922
 923    return &psc->base;
 924
 925 handle_error:
 926    if (psc->fd >= 0)
 927       close(psc->fd);
 928    if (psc->driver)
 929       dlclose(psc->driver);
 930    Xfree(driverName);
 931    Xfree(deviceName);
 932    glx_screen_cleanup(&psc->base);
 933    XFree(psc);
 934
 935    return NULL;
 936 }
 937
 938 /* Called from __glXFreeDisplayPrivate.
 939  */
 940 static void
 941 dri2DestroyDisplay(__GLXDRIdisplay * dpy)
 942 {
 943    Xfree(dpy);
 944 }
 945
 946 _X_HIDDEN __GLXDRIdrawable *
 947 dri2GetGlxDrawableFromXDrawableId(Display *dpy, XID id)
 948 {
 949    struct glx_display *d = __glXInitialize(dpy);
 950    struct dri2_display *pdp = (struct dri2_display *) d->dri2Display;
 951    __GLXDRIdrawable *pdraw;
 952
 953    if (__glxHashLookup(pdp->dri2Hash, id, (void *) &pdraw) == 0)
 954       return pdraw;
 955
 956    return NULL;
 957 }
 958
 959 /*
 960  * Allocate, initialize and return a __DRIdisplayPrivate object.
 961  * This is called from __glXInitialize() when we are given a new
 962  * display pointer.
 963  */
 964 _X_HIDDEN __GLXDRIdisplay *
 965 dri2CreateDisplay(Display * dpy)
 966 {
 967    struct dri2_display *pdp;
 968    int eventBase, errorBase, i;
 969
 970    if (!DRI2QueryExtension(dpy, &eventBase, &errorBase))
 971       return NULL;
 972
 973    pdp = Xmalloc(sizeof *pdp);
 974    if (pdp == NULL)
 975       return NULL;
 976
 977    if (!DRI2QueryVersion(dpy, &pdp->driMajor, &pdp->driMinor)) {
 978       Xfree(pdp);
 979       return NULL;
 980    }
 981
 982    pdp->driPatch = 0;
 983    pdp->swapAvailable = (pdp->driMinor >= 2);
 984    pdp->invalidateAvailable = (pdp->driMinor >= 3);
 985
 986    pdp->base.destroyDisplay = dri2DestroyDisplay;
 987    pdp->base.createScreen = dri2CreateScreen;
 988
 989    i = 0;
 990    if (pdp->driMinor < 1)
 991       pdp->loader_extensions[i++] = &dri2LoaderExtension_old.base;
 992    else
 993       pdp->loader_extensions[i++] = &dri2LoaderExtension.base;
 994
 995    pdp->loader_extensions[i++] = &systemTimeExtension.base;
 996
 997 #ifdef __DRI_USE_INVALIDATE
 998    pdp->loader_extensions[i++] = &dri2UseInvalidate.base;
 999 #endif
1000    pdp->loader_extensions[i++] = NULL;
1001
1002    pdp->dri2Hash = __glxHashCreate();
1003    if (pdp->dri2Hash == NULL) {
1004       Xfree(pdp);
1005       return NULL;
1006    }
1007
1008    return &pdp->base;
1009 }
1010
1011 #endif /* GLX_DIRECT_RENDERING */