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    driReleaseDrawables(&pcp->base);
 147
 148    if (pdraw == NULL || pread == NULL)
 149       return GLXBadDrawable;
 150
 151    if (!(*psc->core->bindContext) (pcp->driContext,
 152                                    pdraw->driDrawable, pread->driDrawable))
 153       return GLXBadContext;
 154
 155    /* If the server doesn't send invalidate events, we may miss a
 156     * resize before the rendering starts.  Invalidate the buffers now
 157     * so the driver will recheck before rendering starts. */
 158    pdp = (struct dri2_display *) psc->base.display;
 159    if (!pdp->invalidateAvailable) {
 160       dri2InvalidateBuffers(psc->base.dpy, pdraw->base.xDrawable);
 161       if (pread != pdraw)
 162          dri2InvalidateBuffers(psc->base.dpy, pread->base.xDrawable);
 163    }
 164
 165    return Success;
 166 }
 167
 168 static void
 169 dri2_unbind_context(struct glx_context *context, struct glx_context *new)
 170 {
 171    struct dri2_context *pcp = (struct dri2_context *) context;
 172    struct dri2_screen *psc = (struct dri2_screen *) pcp->base.psc;
 173
 174    (*psc->core->unbindContext) (pcp->driContext);
 175 }
 176
 177 static struct glx_context *
 178 dri2_create_context(struct glx_screen *base,
 179                     struct glx_config *config_base,
 180                     struct glx_context *shareList, int renderType)
 181 {
 182    struct dri2_context *pcp, *pcp_shared;
 183    struct dri2_screen *psc = (struct dri2_screen *) base;
 184    __GLXDRIconfigPrivate *config = (__GLXDRIconfigPrivate *) config_base;
 185    __DRIcontext *shared = NULL;
 186
 187    if (shareList) {
 188       pcp_shared = (struct dri2_context *) shareList;
 189       shared = pcp_shared->driContext;
 190    }
 191
 192    pcp = Xmalloc(sizeof *pcp);
 193    if (pcp == NULL)
 194       return NULL;
 195
 196    memset(pcp, 0, sizeof *pcp);
 197    if (!glx_context_init(&pcp->base, &psc->base, &config->base)) {
 198       Xfree(pcp);
 199       return NULL;
 200    }
 201
 202    pcp->driContext =
 203       (*psc->dri2->createNewContext) (psc->driScreen,
 204                                       config->driConfig, shared, pcp);
 205
 206    if (pcp->driContext == NULL) {
 207       Xfree(pcp);
 208       return NULL;
 209    }
 210
 211    pcp->base.vtable = &dri2_context_vtable;
 212
 213    return &pcp->base;
 214 }
 215
 216 static void
 217 dri2DestroyDrawable(__GLXDRIdrawable *base)
 218 {
 219    struct dri2_screen *psc = (struct dri2_screen *) base->psc;
 220    struct dri2_drawable *pdraw = (struct dri2_drawable *) base;
 221    struct glx_display *dpyPriv = psc->base.display;
 222    struct dri2_display *pdp = (struct dri2_display *)dpyPriv->dri2Display;
 223
 224    __glxHashDelete(pdp->dri2Hash, pdraw->base.xDrawable);
 225    (*psc->core->destroyDrawable) (pdraw->driDrawable);
 226
 227    /* If it's a GLX 1.3 drawables, we can destroy the DRI2 drawable
 228     * now, as the application explicitly asked to destroy the GLX
 229     * drawable.  Otherwise, for legacy drawables, we let the DRI2
 230     * drawable linger on the server, since there's no good way of
 231     * knowing when the application is done with it.  The server will
 232     * destroy the DRI2 drawable when it destroys the X drawable or the
 233     * client exits anyway. */
 234    if (pdraw->base.xDrawable != pdraw->base.drawable)
 235       DRI2DestroyDrawable(psc->base.dpy, pdraw->base.xDrawable);
 236
 237    Xfree(pdraw);
 238 }
 239
 240 static __GLXDRIdrawable *
 241 dri2CreateDrawable(struct glx_screen *base, XID xDrawable,
 242                    GLXDrawable drawable, struct glx_config *config_base)
 243 {
 244    struct dri2_drawable *pdraw;
 245    struct dri2_screen *psc = (struct dri2_screen *) base;
 246    __GLXDRIconfigPrivate *config = (__GLXDRIconfigPrivate *) config_base;
 247    struct glx_display *dpyPriv;
 248    struct dri2_display *pdp;
 249    GLint vblank_mode = DRI_CONF_VBLANK_DEF_INTERVAL_1;
 250
 251    pdraw = Xmalloc(sizeof(*pdraw));
 252    if (!pdraw)
 253       return NULL;
 254
 255    memset(pdraw, 0, sizeof *pdraw);
 256    pdraw->base.destroyDrawable = dri2DestroyDrawable;
 257    pdraw->base.xDrawable = xDrawable;
 258    pdraw->base.drawable = drawable;
 259    pdraw->base.psc = &psc->base;
 260    pdraw->bufferCount = 0;
 261    pdraw->swap_interval = 1; /* default may be overridden below */
 262    pdraw->have_back = 0;
 263
 264    if (psc->config)
 265       psc->config->configQueryi(psc->driScreen,
 266                                 "vblank_mode", &vblank_mode);
 267
 268    switch (vblank_mode) {
 269    case DRI_CONF_VBLANK_NEVER:
 270    case DRI_CONF_VBLANK_DEF_INTERVAL_0:
 271       pdraw->swap_interval = 0;
 272       break;
 273    case DRI_CONF_VBLANK_DEF_INTERVAL_1:
 274    case DRI_CONF_VBLANK_ALWAYS_SYNC:
 275    default:
 276       pdraw->swap_interval = 1;
 277       break;
 278    }
 279
 280    DRI2CreateDrawable(psc->base.dpy, xDrawable);
 281
 282    dpyPriv = __glXInitialize(psc->base.dpy);
 283    pdp = (struct dri2_display *)dpyPriv->dri2Display;;
 284    /* Create a new drawable */
 285    pdraw->driDrawable =
 286       (*psc->dri2->createNewDrawable) (psc->driScreen,
 287                                        config->driConfig, pdraw);
 288
 289    if (!pdraw->driDrawable) {
 290       DRI2DestroyDrawable(psc->base.dpy, xDrawable);
 291       Xfree(pdraw);
 292       return NULL;
 293    }
 294
 295    if (__glxHashInsert(pdp->dri2Hash, xDrawable, pdraw)) {
 296       (*psc->core->destroyDrawable) (pdraw->driDrawable);
 297       DRI2DestroyDrawable(psc->base.dpy, xDrawable);
 298       Xfree(pdraw);
 299       return None;
 300    }
 301
 302
 303 #ifdef X_DRI2SwapInterval
 304    /*
 305     * Make sure server has the same swap interval we do for the new
 306     * drawable.
 307     */
 308    if (pdp->swapAvailable)
 309       DRI2SwapInterval(psc->base.dpy, xDrawable, pdraw->swap_interval);
 310 #endif
 311
 312    return &pdraw->base;
 313 }
 314
 315 #ifdef X_DRI2GetMSC
 316
 317 static int
 318 dri2DrawableGetMSC(struct glx_screen *psc, __GLXDRIdrawable *pdraw,
 319                    int64_t *ust, int64_t *msc, int64_t *sbc)
 320 {
 321    CARD64 dri2_ust, dri2_msc, dri2_sbc;
 322    int ret;
 323
 324    ret = DRI2GetMSC(psc->dpy, pdraw->xDrawable,
 325                     &dri2_ust, &dri2_msc, &dri2_sbc);
 326    *ust = dri2_ust;
 327    *msc = dri2_msc;
 328    *sbc = dri2_sbc;
 329
 330    return ret;
 331 }
 332
 333 #endif
 334
 335
 336 #ifdef X_DRI2WaitMSC
 337
 338 static int
 339 dri2WaitForMSC(__GLXDRIdrawable *pdraw, int64_t target_msc, int64_t divisor,
 340                int64_t remainder, int64_t *ust, int64_t *msc, int64_t *sbc)
 341 {
 342    CARD64 dri2_ust, dri2_msc, dri2_sbc;
 343    int ret;
 344
 345    ret = DRI2WaitMSC(pdraw->psc->dpy, pdraw->xDrawable, target_msc, divisor,
 346                      remainder, &dri2_ust, &dri2_msc, &dri2_sbc);
 347    *ust = dri2_ust;
 348    *msc = dri2_msc;
 349    *sbc = dri2_sbc;
 350
 351    return ret;
 352 }
 353
 354 static int
 355 dri2WaitForSBC(__GLXDRIdrawable *pdraw, int64_t target_sbc, int64_t *ust,
 356                int64_t *msc, int64_t *sbc)
 357 {
 358    CARD64 dri2_ust, dri2_msc, dri2_sbc;
 359    int ret;
 360
 361    ret = DRI2WaitSBC(pdraw->psc->dpy, pdraw->xDrawable,
 362                      target_sbc, &dri2_ust, &dri2_msc, &dri2_sbc);
 363    *ust = dri2_ust;
 364    *msc = dri2_msc;
 365    *sbc = dri2_sbc;
 366
 367    return ret;
 368 }
 369
 370 #endif /* X_DRI2WaitMSC */
 371
 372 static void
 373 dri2CopySubBuffer(__GLXDRIdrawable *pdraw, int x, int y, int width, int height)
 374 {
 375    struct dri2_drawable *priv = (struct dri2_drawable *) pdraw;
 376    struct dri2_screen *psc = (struct dri2_screen *) pdraw->psc;
 377    XRectangle xrect;
 378    XserverRegion region;
 379
 380    /* Check we have the right attachments */
 381    if (!priv->have_back)
 382       return;
 383
 384    xrect.x = x;
 385    xrect.y = priv->height - y - height;
 386    xrect.width = width;
 387    xrect.height = height;
 388
 389 #ifdef __DRI2_FLUSH
 390    if (psc->f)
 391       (*psc->f->flush) (priv->driDrawable);
 392 #endif
 393
 394    region = XFixesCreateRegion(psc->base.dpy, &xrect, 1);
 395    DRI2CopyRegion(psc->base.dpy, pdraw->xDrawable, region,
 396                   DRI2BufferFrontLeft, DRI2BufferBackLeft);
 397
 398    /* Refresh the fake front (if present) after we just damaged the real
 399     * front.
 400     */
 401    if (priv->have_fake_front)
 402       DRI2CopyRegion(psc->base.dpy, pdraw->xDrawable, region,
 403                      DRI2BufferFakeFrontLeft, DRI2BufferFrontLeft);
 404
 405    XFixesDestroyRegion(psc->base.dpy, region);
 406 }
 407
 408 static void
 409 dri2_copy_drawable(struct dri2_drawable *priv, int dest, int src)
 410 {
 411    XRectangle xrect;
 412    XserverRegion region;
 413    struct dri2_screen *psc = (struct dri2_screen *) priv->base.psc;
 414
 415    xrect.x = 0;
 416    xrect.y = 0;
 417    xrect.width = priv->width;
 418    xrect.height = priv->height;
 419
 420 #ifdef __DRI2_FLUSH
 421    if (psc->f)
 422       (*psc->f->flush) (priv->driDrawable);
 423 #endif
 424
 425    region = XFixesCreateRegion(psc->base.dpy, &xrect, 1);
 426    DRI2CopyRegion(psc->base.dpy, priv->base.xDrawable, region, dest, src);
 427    XFixesDestroyRegion(psc->base.dpy, region);
 428
 429 }
 430
 431 static void
 432 dri2_wait_x(struct glx_context *gc)
 433 {
 434    struct dri2_drawable *priv = (struct dri2_drawable *)
 435       GetGLXDRIDrawable(gc->currentDpy, gc->currentDrawable);
 436
 437    if (priv == NULL || !priv->have_fake_front)
 438       return;
 439
 440    dri2_copy_drawable(priv, DRI2BufferFakeFrontLeft, DRI2BufferFrontLeft);
 441 }
 442
 443 static void
 444 dri2_wait_gl(struct glx_context *gc)
 445 {
 446    struct dri2_drawable *priv = (struct dri2_drawable *)
 447       GetGLXDRIDrawable(gc->currentDpy, gc->currentDrawable);
 448
 449    if (priv == NULL || !priv->have_fake_front)
 450       return;
 451
 452    dri2_copy_drawable(priv, DRI2BufferFrontLeft, DRI2BufferFakeFrontLeft);
 453 }
 454
 455 static void
 456 dri2FlushFrontBuffer(__DRIdrawable *driDrawable, void *loaderPrivate)
 457 {
 458    struct glx_display *priv;
 459    struct dri2_display *pdp;
 460    struct glx_context *gc;
 461    struct dri2_drawable *pdraw = loaderPrivate;
 462
 463    if (!pdraw)
 464       return;
 465
 466    if (!pdraw->base.psc)
 467       return;
 468
 469    priv = __glXInitialize(pdraw->base.psc->dpy);
 470    pdp = (struct dri2_display *) priv->dri2Display;
 471    gc = __glXGetCurrentContext();
 472
 473    /* Old servers don't send invalidate events */
 474    if (!pdp->invalidateAvailable)
 475        dri2InvalidateBuffers(priv->dpy, pdraw->base.xDrawable);
 476
 477    dri2_wait_gl(gc);
 478 }
 479
 480
 481 static void
 482 dri2DestroyScreen(struct glx_screen *base)
 483 {
 484    struct dri2_screen *psc = (struct dri2_screen *) base;
 485
 486    /* Free the direct rendering per screen data */
 487    (*psc->core->destroyScreen) (psc->driScreen);
 488    driDestroyConfigs(psc->driver_configs);
 489    close(psc->fd);
 490    Xfree(psc);
 491 }
 492
 493 /**
 494  * Process list of buffer received from the server
 495  *
 496  * Processes the list of buffers received in a reply from the server to either
 497  * \c DRI2GetBuffers or \c DRI2GetBuffersWithFormat.
 498  */
 499 static void
 500 process_buffers(struct dri2_drawable * pdraw, DRI2Buffer * buffers,
 501                 unsigned count)
 502 {
 503    int i;
 504
 505    pdraw->bufferCount = count;
 506    pdraw->have_fake_front = 0;
 507    pdraw->have_back = 0;
 508
 509    /* This assumes the DRI2 buffer attachment tokens matches the
 510     * __DRIbuffer tokens. */
 511    for (i = 0; i < count; i++) {
 512       pdraw->buffers[i].attachment = buffers[i].attachment;
 513       pdraw->buffers[i].name = buffers[i].name;
 514       pdraw->buffers[i].pitch = buffers[i].pitch;
 515       pdraw->buffers[i].cpp = buffers[i].cpp;
 516       pdraw->buffers[i].flags = buffers[i].flags;
 517       if (pdraw->buffers[i].attachment == __DRI_BUFFER_FAKE_FRONT_LEFT)
 518          pdraw->have_fake_front = 1;
 519       if (pdraw->buffers[i].attachment == __DRI_BUFFER_BACK_LEFT)
 520          pdraw->have_back = 1;
 521    }
 522
 523 }
 524
 525 unsigned dri2GetSwapEventType(Display* dpy, XID drawable)
 526 {
 527       struct glx_display *glx_dpy = __glXInitialize(dpy);
 528       __GLXDRIdrawable *pdraw;
 529       pdraw = dri2GetGlxDrawableFromXDrawableId(dpy, drawable);
 530       if (!pdraw || !(pdraw->eventMask & GLX_BUFFER_SWAP_COMPLETE_INTEL_MASK))
 531          return 0;
 532       return glx_dpy->codes->first_event + GLX_BufferSwapComplete;
 533 }
 534
 535 static int64_t
 536 dri2SwapBuffers(__GLXDRIdrawable *pdraw, int64_t target_msc, int64_t divisor,
 537                 int64_t remainder)
 538 {
 539     struct dri2_drawable *priv = (struct dri2_drawable *) pdraw;
 540     struct glx_display *dpyPriv = __glXInitialize(priv->base.psc->dpy);
 541     struct dri2_screen *psc = (struct dri2_screen *) priv->base.psc;
 542     struct dri2_display *pdp =
 543         (struct dri2_display *)dpyPriv->dri2Display;
 544     CARD64 ret = 0;
 545
 546 #ifdef __DRI2_FLUSH
 547     if (psc->f) {
 548        struct glx_context *gc = __glXGetCurrentContext();
 549
 550        if (gc) {
 551           (*psc->f->flush)(priv->driDrawable);
 552        }
 553     }
 554 #endif
 555
 556     /* Old servers don't send invalidate events */
 557     if (!pdp->invalidateAvailable)
 558        dri2InvalidateBuffers(dpyPriv->dpy, pdraw->xDrawable);
 559
 560     /* Old servers can't handle swapbuffers */
 561     if (!pdp->swapAvailable) {
 562        dri2CopySubBuffer(pdraw, 0, 0, priv->width, priv->height);
 563        return 0;
 564     }
 565
 566 #ifdef X_DRI2SwapBuffers
 567     DRI2SwapBuffers(psc->base.dpy, pdraw->xDrawable, target_msc, divisor,
 568                     remainder, &ret);
 569 #endif
 570
 571     return ret;
 572 }
 573
 574 static __DRIbuffer *
 575 dri2GetBuffers(__DRIdrawable * driDrawable,
 576                int *width, int *height,
 577                unsigned int *attachments, int count,
 578                int *out_count, void *loaderPrivate)
 579 {
 580    struct dri2_drawable *pdraw = loaderPrivate;
 581    DRI2Buffer *buffers;
 582
 583    buffers = DRI2GetBuffers(pdraw->base.psc->dpy, pdraw->base.xDrawable,
 584                             width, height, attachments, count, out_count);
 585    if (buffers == NULL)
 586       return NULL;
 587
 588    pdraw->width = *width;
 589    pdraw->height = *height;
 590    process_buffers(pdraw, buffers, *out_count);
 591
 592    Xfree(buffers);
 593
 594    return pdraw->buffers;
 595 }
 596
 597 static __DRIbuffer *
 598 dri2GetBuffersWithFormat(__DRIdrawable * driDrawable,
 599                          int *width, int *height,
 600                          unsigned int *attachments, int count,
 601                          int *out_count, void *loaderPrivate)
 602 {
 603    struct dri2_drawable *pdraw = loaderPrivate;
 604    DRI2Buffer *buffers;
 605
 606    buffers = DRI2GetBuffersWithFormat(pdraw->base.psc->dpy,
 607                                       pdraw->base.xDrawable,
 608                                       width, height, attachments,
 609                                       count, out_count);
 610    if (buffers == NULL)
 611       return NULL;
 612
 613    pdraw->width = *width;
 614    pdraw->height = *height;
 615    process_buffers(pdraw, buffers, *out_count);
 616
 617    Xfree(buffers);
 618
 619    return pdraw->buffers;
 620 }
 621
 622 #ifdef X_DRI2SwapInterval
 623
 624 static int
 625 dri2SetSwapInterval(__GLXDRIdrawable *pdraw, int interval)
 626 {
 627    struct dri2_drawable *priv =  (struct dri2_drawable *) pdraw;
 628    GLint vblank_mode = DRI_CONF_VBLANK_DEF_INTERVAL_1;
 629    struct dri2_screen *psc = (struct dri2_screen *) priv->base.psc;
 630
 631    if (psc->config)
 632       psc->config->configQueryi(psc->driScreen,
 633                                 "vblank_mode", &vblank_mode);
 634
 635    switch (vblank_mode) {
 636    case DRI_CONF_VBLANK_NEVER:
 637       return GLX_BAD_VALUE;
 638    case DRI_CONF_VBLANK_ALWAYS_SYNC:
 639       if (interval <= 0)
 640          return GLX_BAD_VALUE;
 641       break;
 642    default:
 643       break;
 644    }
 645
 646    DRI2SwapInterval(priv->base.psc->dpy, priv->base.xDrawable, interval);
 647    priv->swap_interval = interval;
 648
 649    return 0;
 650 }
 651
 652 static int
 653 dri2GetSwapInterval(__GLXDRIdrawable *pdraw)
 654 {
 655    struct dri2_drawable *priv =  (struct dri2_drawable *) pdraw;
 656
 657   return priv->swap_interval;
 658 }
 659
 660 #endif /* X_DRI2SwapInterval */
 661
 662 static const __DRIdri2LoaderExtension dri2LoaderExtension = {
 663    {__DRI_DRI2_LOADER, __DRI_DRI2_LOADER_VERSION},
 664    dri2GetBuffers,
 665    dri2FlushFrontBuffer,
 666    dri2GetBuffersWithFormat,
 667 };
 668
 669 static const __DRIdri2LoaderExtension dri2LoaderExtension_old = {
 670    {__DRI_DRI2_LOADER, __DRI_DRI2_LOADER_VERSION},
 671    dri2GetBuffers,
 672    dri2FlushFrontBuffer,
 673    NULL,
 674 };
 675
 676 #ifdef __DRI_USE_INVALIDATE
 677 static const __DRIuseInvalidateExtension dri2UseInvalidate = {
 678    { __DRI_USE_INVALIDATE, __DRI_USE_INVALIDATE_VERSION }
 679 };
 680 #endif
 681
 682 _X_HIDDEN void
 683 dri2InvalidateBuffers(Display *dpy, XID drawable)
 684 {
 685    __GLXDRIdrawable *pdraw =
 686       dri2GetGlxDrawableFromXDrawableId(dpy, drawable);
 687    struct dri2_screen *psc;
 688    struct dri2_drawable *pdp = (struct dri2_drawable *) pdraw;
 689
 690    if (!pdraw)
 691       return;
 692
 693    psc = (struct dri2_screen *) pdraw->psc;
 694
 695 #if __DRI2_FLUSH_VERSION >= 3
 696    if (pdraw && psc->f && psc->f->base.version >= 3 && psc->f->invalidate)
 697        psc->f->invalidate(pdp->driDrawable);
 698 #endif
 699 }
 700
 701 static void
 702 dri2_bind_tex_image(Display * dpy,
 703                     GLXDrawable drawable,
 704                     int buffer, const int *attrib_list)
 705 {
 706    struct glx_context *gc = __glXGetCurrentContext();
 707    struct dri2_context *pcp = (struct dri2_context *) gc;
 708    __GLXDRIdrawable *base = GetGLXDRIDrawable(dpy, drawable);
 709    struct glx_display *dpyPriv = __glXInitialize(dpy);
 710    struct dri2_drawable *pdraw = (struct dri2_drawable *) base;
 711    struct dri2_display *pdp =
 712       (struct dri2_display *) dpyPriv->dri2Display;
 713    struct dri2_screen *psc;
 714
 715    if (pdraw != NULL) {
 716       psc = (struct dri2_screen *) base->psc;
 717
 718 #if __DRI2_FLUSH_VERSION >= 3
 719       if (!pdp->invalidateAvailable && psc->f &&
 720            psc->f->base.version >= 3 && psc->f->invalidate)
 721          psc->f->invalidate(pdraw->driDrawable);
 722 #endif
 723
 724       if (psc->texBuffer->base.version >= 2 &&
 725           psc->texBuffer->setTexBuffer2 != NULL) {
 726          (*psc->texBuffer->setTexBuffer2) (pcp->driContext,
 727                                            pdraw->base.textureTarget,
 728                                            pdraw->base.textureFormat,
 729                                            pdraw->driDrawable);
 730       }
 731       else {
 732          (*psc->texBuffer->setTexBuffer) (pcp->driContext,
 733                                           pdraw->base.textureTarget,
 734                                           pdraw->driDrawable);
 735       }
 736    }
 737 }
 738
 739 static void
 740 dri2_release_tex_image(Display * dpy, GLXDrawable drawable, int buffer)
 741 {
 742 #if __DRI_TEX_BUFFER_VERSION >= 3
 743    struct glx_context *gc = __glXGetCurrentContext();
 744    struct dri2_context *pcp = (struct dri2_context *) gc;
 745    __GLXDRIdrawable *base = GetGLXDRIDrawable(dpy, drawable);
 746    struct glx_display *dpyPriv = __glXInitialize(dpy);
 747    struct dri2_drawable *pdraw = (struct dri2_drawable *) base;
 748    struct dri2_display *pdp =
 749       (struct dri2_display *) dpyPriv->dri2Display;
 750    struct dri2_screen *psc;
 751
 752    if (pdraw != NULL) {
 753       psc = (struct dri2_screen *) base->psc;
 754
 755       if (psc->texBuffer->base.version >= 3 &&
 756           psc->texBuffer->releaseTexBuffer != NULL) {
 757          (*psc->texBuffer->releaseTexBuffer) (pcp->driContext,
 758                                            pdraw->base.textureTarget,
 759                                            pdraw->driDrawable);
 760       }
 761    }
 762 #endif
 763 }
 764
 765 static const struct glx_context_vtable dri2_context_vtable = {
 766    dri2_destroy_context,
 767    dri2_bind_context,
 768    dri2_unbind_context,
 769    dri2_wait_gl,
 770    dri2_wait_x,
 771    DRI_glXUseXFont,
 772    dri2_bind_tex_image,
 773    dri2_release_tex_image,
 774    NULL, /* get_proc_address */
 775 };
 776
 777 static void
 778 dri2BindExtensions(struct dri2_screen *psc, const __DRIextension **extensions)
 779 {
 780    int i;
 781
 782    __glXEnableDirectExtension(&psc->base, "GLX_SGI_video_sync");
 783    __glXEnableDirectExtension(&psc->base, "GLX_SGI_swap_control");
 784    __glXEnableDirectExtension(&psc->base, "GLX_MESA_swap_control");
 785    __glXEnableDirectExtension(&psc->base, "GLX_SGI_make_current_read");
 786
 787    /* FIXME: if DRI2 version supports it... */
 788    __glXEnableDirectExtension(&psc->base, "INTEL_swap_event");
 789
 790    for (i = 0; extensions[i]; i++) {
 791       if ((strcmp(extensions[i]->name, __DRI_TEX_BUFFER) == 0)) {
 792          psc->texBuffer = (__DRItexBufferExtension *) extensions[i];
 793          __glXEnableDirectExtension(&psc->base, "GLX_EXT_texture_from_pixmap");
 794       }
 795
 796       if ((strcmp(extensions[i]->name, __DRI2_FLUSH) == 0)) {
 797          psc->f = (__DRI2flushExtension *) extensions[i];
 798          /* internal driver extension, no GL extension exposed */
 799       }
 800
 801       if ((strcmp(extensions[i]->name, __DRI2_CONFIG_QUERY) == 0))
 802          psc->config = (__DRI2configQueryExtension *) extensions[i];
 803    }
 804 }
 805
 806 static const struct glx_screen_vtable dri2_screen_vtable = {
 807    dri2_create_context
 808 };
 809
 810 static struct glx_screen *
 811 dri2CreateScreen(int screen, struct glx_display * priv)
 812 {
 813    const __DRIconfig **driver_configs;
 814    const __DRIextension **extensions;
 815    const struct dri2_display *const pdp = (struct dri2_display *)
 816       priv->dri2Display;
 817    struct dri2_screen *psc;
 818    __GLXDRIscreen *psp;
 819    char *driverName, *deviceName;
 820    drm_magic_t magic;
 821    int i;
 822
 823    psc = Xmalloc(sizeof *psc);
 824    if (psc == NULL)
 825       return NULL;
 826
 827    memset(psc, 0, sizeof *psc);
 828    psc->fd = -1;
 829
 830    if (!glx_screen_init(&psc->base, screen, priv)) {
 831       Xfree(psc);
 832       return NULL;
 833    }
 834
 835    if (!DRI2Connect(priv->dpy, RootWindow(priv->dpy, screen),
 836                     &driverName, &deviceName)) {
 837       glx_screen_cleanup(&psc->base);
 838       XFree(psc);
 839       return NULL;
 840    }
 841
 842    psc->driver = driOpenDriver(driverName);
 843    if (psc->driver == NULL) {
 844       ErrorMessageF("driver pointer missing\n");
 845       goto handle_error;
 846    }
 847
 848    extensions = dlsym(psc->driver, __DRI_DRIVER_EXTENSIONS);
 849    if (extensions == NULL) {
 850       ErrorMessageF("driver exports no extensions (%s)\n", dlerror());
 851       goto handle_error;
 852    }
 853
 854    for (i = 0; extensions[i]; i++) {
 855       if (strcmp(extensions[i]->name, __DRI_CORE) == 0)
 856          psc->core = (__DRIcoreExtension *) extensions[i];
 857       if (strcmp(extensions[i]->name, __DRI_DRI2) == 0)
 858          psc->dri2 = (__DRIdri2Extension *) extensions[i];
 859    }
 860
 861    if (psc->core == NULL || psc->dri2 == NULL) {
 862       ErrorMessageF("core dri or dri2 extension not found\n");
 863       goto handle_error;
 864    }
 865
 866    psc->fd = open(deviceName, O_RDWR);
 867    if (psc->fd < 0) {
 868       ErrorMessageF("failed to open drm device: %s\n", strerror(errno));
 869       goto handle_error;
 870    }
 871
 872    if (drmGetMagic(psc->fd, &magic)) {
 873       ErrorMessageF("failed to get magic\n");
 874       goto handle_error;
 875    }
 876
 877    if (!DRI2Authenticate(priv->dpy, RootWindow(priv->dpy, screen), magic)) {
 878       ErrorMessageF("failed to authenticate magic %d\n", magic);
 879       goto handle_error;
 880    }
 881
 882
 883    /* If the server does not support the protocol for
 884     * DRI2GetBuffersWithFormat, don't supply that interface to the driver.
 885     */
 886    psc->driScreen =
 887       psc->dri2->createNewScreen(screen, psc->fd,
 888                                  (const __DRIextension **)
 889                                  &pdp->loader_extensions[0],
 890                                  &driver_configs, psc);
 891
 892    if (psc->driScreen == NULL) {
 893       ErrorMessageF("failed to create dri screen\n");
 894       goto handle_error;
 895    }
 896
 897    extensions = psc->core->getExtensions(psc->driScreen);
 898    dri2BindExtensions(psc, extensions);
 899
 900    psc->base.configs =
 901       driConvertConfigs(psc->core, psc->base.configs, driver_configs);
 902    psc->base.visuals =
 903       driConvertConfigs(psc->core, psc->base.visuals, driver_configs);
 904
 905    psc->driver_configs = driver_configs;
 906
 907    psc->base.vtable = &dri2_screen_vtable;
 908    psp = &psc->vtable;
 909    psc->base.driScreen = psp;
 910    psp->destroyScreen = dri2DestroyScreen;
 911    psp->createDrawable = dri2CreateDrawable;
 912    psp->swapBuffers = dri2SwapBuffers;
 913    psp->getDrawableMSC = NULL;
 914    psp->waitForMSC = NULL;
 915    psp->waitForSBC = NULL;
 916    psp->setSwapInterval = NULL;
 917    psp->getSwapInterval = NULL;
 918
 919    if (pdp->driMinor >= 2) {
 920 #ifdef X_DRI2GetMSC
 921       psp->getDrawableMSC = dri2DrawableGetMSC;
 922 #endif
 923 #ifdef X_DRI2WaitMSC
 924       psp->waitForMSC = dri2WaitForMSC;
 925       psp->waitForSBC = dri2WaitForSBC;
 926 #endif
 927 #ifdef X_DRI2SwapInterval
 928       psp->setSwapInterval = dri2SetSwapInterval;
 929       psp->getSwapInterval = dri2GetSwapInterval;
 930 #endif
 931 #if defined(X_DRI2GetMSC) && defined(X_DRI2WaitMSC) && defined(X_DRI2SwapInterval)
 932       __glXEnableDirectExtension(&psc->base, "GLX_OML_sync_control");
 933 #endif
 934    }
 935
 936    /* DRI2 suports SubBuffer through DRI2CopyRegion, so it's always
 937     * available.*/
 938    psp->copySubBuffer = dri2CopySubBuffer;
 939    __glXEnableDirectExtension(&psc->base, "GLX_MESA_copy_sub_buffer");
 940
 941    Xfree(driverName);
 942    Xfree(deviceName);
 943
 944    return &psc->base;
 945
 946 handle_error:
 947    if (psc->fd >= 0)
 948       close(psc->fd);
 949    if (psc->driver)
 950       dlclose(psc->driver);
 951    Xfree(driverName);
 952    Xfree(deviceName);
 953    glx_screen_cleanup(&psc->base);
 954    XFree(psc);
 955
 956    return NULL;
 957 }
 958
 959 /* Called from __glXFreeDisplayPrivate.
 960  */
 961 static void
 962 dri2DestroyDisplay(__GLXDRIdisplay * dpy)
 963 {
 964    struct dri2_display *pdp = (struct dri2_display *) dpy;
 965
 966    __glxHashDestroy(pdp->dri2Hash);
 967    Xfree(dpy);
 968 }
 969
 970 _X_HIDDEN __GLXDRIdrawable *
 971 dri2GetGlxDrawableFromXDrawableId(Display *dpy, XID id)
 972 {
 973    struct glx_display *d = __glXInitialize(dpy);
 974    struct dri2_display *pdp = (struct dri2_display *) d->dri2Display;
 975    __GLXDRIdrawable *pdraw;
 976
 977    if (__glxHashLookup(pdp->dri2Hash, id, (void *) &pdraw) == 0)
 978       return pdraw;
 979
 980    return NULL;
 981 }
 982
 983 /*
 984  * Allocate, initialize and return a __DRIdisplayPrivate object.
 985  * This is called from __glXInitialize() when we are given a new
 986  * display pointer.
 987  */
 988 _X_HIDDEN __GLXDRIdisplay *
 989 dri2CreateDisplay(Display * dpy)
 990 {
 991    struct dri2_display *pdp;
 992    int eventBase, errorBase, i;
 993
 994    if (!DRI2QueryExtension(dpy, &eventBase, &errorBase))
 995       return NULL;
 996
 997    pdp = Xmalloc(sizeof *pdp);
 998    if (pdp == NULL)
 999       return NULL;
1000
1001    if (!DRI2QueryVersion(dpy, &pdp->driMajor, &pdp->driMinor)) {
1002       Xfree(pdp);
1003       return NULL;
1004    }
1005
1006    pdp->driPatch = 0;
1007    pdp->swapAvailable = (pdp->driMinor >= 2);
1008    pdp->invalidateAvailable = (pdp->driMinor >= 3);
1009
1010    pdp->base.destroyDisplay = dri2DestroyDisplay;
1011    pdp->base.createScreen = dri2CreateScreen;
1012
1013    i = 0;
1014    if (pdp->driMinor < 1)
1015       pdp->loader_extensions[i++] = &dri2LoaderExtension_old.base;
1016    else
1017       pdp->loader_extensions[i++] = &dri2LoaderExtension.base;
1018
1019    pdp->loader_extensions[i++] = &systemTimeExtension.base;
1020
1021 #ifdef __DRI_USE_INVALIDATE
1022    pdp->loader_extensions[i++] = &dri2UseInvalidate.base;
1023 #endif
1024    pdp->loader_extensions[i++] = NULL;
1025
1026    pdp->dri2Hash = __glxHashCreate();
1027    if (pdp->dri2Hash == NULL) {
1028       Xfree(pdp);
1029       return NULL;
1030    }
1031
1032    return &pdp->base;
1033 }
1034
1035 #endif /* GLX_DIRECT_RENDERING */