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     /* Old servers can't handle swapbuffers */
 547     if (!pdp->swapAvailable) {
 548        dri2CopySubBuffer(pdraw, 0, 0, priv->width, priv->height);
 549     } else {
 550 #ifdef X_DRI2SwapBuffers
 551 #ifdef __DRI2_FLUSH
 552     if (psc->f) {
 553        struct glx_context *gc = __glXGetCurrentContext();
 554
 555        if (gc) {
 556           (*psc->f->flush)(priv->driDrawable);
 557        }
 558     }
 559 #endif
 560
 561        DRI2SwapBuffers(psc->base.dpy, pdraw->xDrawable,
 562                        target_msc, divisor, remainder, &ret);
 563 #endif
 564     }
 565
 566     /* Old servers don't send invalidate events */
 567     if (!pdp->invalidateAvailable)
 568        dri2InvalidateBuffers(dpyPriv->dpy, pdraw->xDrawable);
 569
 570     return ret;
 571 }
 572
 573 static __DRIbuffer *
 574 dri2GetBuffers(__DRIdrawable * driDrawable,
 575                int *width, int *height,
 576                unsigned int *attachments, int count,
 577                int *out_count, void *loaderPrivate)
 578 {
 579    struct dri2_drawable *pdraw = loaderPrivate;
 580    DRI2Buffer *buffers;
 581
 582    buffers = DRI2GetBuffers(pdraw->base.psc->dpy, pdraw->base.xDrawable,
 583                             width, height, attachments, count, out_count);
 584    if (buffers == NULL)
 585       return NULL;
 586
 587    pdraw->width = *width;
 588    pdraw->height = *height;
 589    process_buffers(pdraw, buffers, *out_count);
 590
 591    Xfree(buffers);
 592
 593    return pdraw->buffers;
 594 }
 595
 596 static __DRIbuffer *
 597 dri2GetBuffersWithFormat(__DRIdrawable * driDrawable,
 598                          int *width, int *height,
 599                          unsigned int *attachments, int count,
 600                          int *out_count, void *loaderPrivate)
 601 {
 602    struct dri2_drawable *pdraw = loaderPrivate;
 603    DRI2Buffer *buffers;
 604
 605    buffers = DRI2GetBuffersWithFormat(pdraw->base.psc->dpy,
 606                                       pdraw->base.xDrawable,
 607                                       width, height, attachments,
 608                                       count, out_count);
 609    if (buffers == NULL)
 610       return NULL;
 611
 612    pdraw->width = *width;
 613    pdraw->height = *height;
 614    process_buffers(pdraw, buffers, *out_count);
 615
 616    Xfree(buffers);
 617
 618    return pdraw->buffers;
 619 }
 620
 621 #ifdef X_DRI2SwapInterval
 622
 623 static int
 624 dri2SetSwapInterval(__GLXDRIdrawable *pdraw, int interval)
 625 {
 626    struct dri2_drawable *priv =  (struct dri2_drawable *) pdraw;
 627    GLint vblank_mode = DRI_CONF_VBLANK_DEF_INTERVAL_1;
 628    struct dri2_screen *psc = (struct dri2_screen *) priv->base.psc;
 629
 630    if (psc->config)
 631       psc->config->configQueryi(psc->driScreen,
 632                                 "vblank_mode", &vblank_mode);
 633
 634    switch (vblank_mode) {
 635    case DRI_CONF_VBLANK_NEVER:
 636       return GLX_BAD_VALUE;
 637    case DRI_CONF_VBLANK_ALWAYS_SYNC:
 638       if (interval <= 0)
 639          return GLX_BAD_VALUE;
 640       break;
 641    default:
 642       break;
 643    }
 644
 645    DRI2SwapInterval(priv->base.psc->dpy, priv->base.xDrawable, interval);
 646    priv->swap_interval = interval;
 647
 648    return 0;
 649 }
 650
 651 static int
 652 dri2GetSwapInterval(__GLXDRIdrawable *pdraw)
 653 {
 654    struct dri2_drawable *priv =  (struct dri2_drawable *) pdraw;
 655
 656   return priv->swap_interval;
 657 }
 658
 659 #endif /* X_DRI2SwapInterval */
 660
 661 static const __DRIdri2LoaderExtension dri2LoaderExtension = {
 662    {__DRI_DRI2_LOADER, __DRI_DRI2_LOADER_VERSION},
 663    dri2GetBuffers,
 664    dri2FlushFrontBuffer,
 665    dri2GetBuffersWithFormat,
 666 };
 667
 668 static const __DRIdri2LoaderExtension dri2LoaderExtension_old = {
 669    {__DRI_DRI2_LOADER, __DRI_DRI2_LOADER_VERSION},
 670    dri2GetBuffers,
 671    dri2FlushFrontBuffer,
 672    NULL,
 673 };
 674
 675 #ifdef __DRI_USE_INVALIDATE
 676 static const __DRIuseInvalidateExtension dri2UseInvalidate = {
 677    { __DRI_USE_INVALIDATE, __DRI_USE_INVALIDATE_VERSION }
 678 };
 679 #endif
 680
 681 _X_HIDDEN void
 682 dri2InvalidateBuffers(Display *dpy, XID drawable)
 683 {
 684    __GLXDRIdrawable *pdraw =
 685       dri2GetGlxDrawableFromXDrawableId(dpy, drawable);
 686    struct dri2_screen *psc;
 687    struct dri2_drawable *pdp = (struct dri2_drawable *) pdraw;
 688
 689    if (!pdraw)
 690       return;
 691
 692    psc = (struct dri2_screen *) pdraw->psc;
 693
 694 #if __DRI2_FLUSH_VERSION >= 3
 695    if (pdraw && psc->f && psc->f->base.version >= 3 && psc->f->invalidate)
 696        psc->f->invalidate(pdp->driDrawable);
 697 #endif
 698 }
 699
 700 static void
 701 dri2_bind_tex_image(Display * dpy,
 702                     GLXDrawable drawable,
 703                     int buffer, const int *attrib_list)
 704 {
 705    struct glx_context *gc = __glXGetCurrentContext();
 706    struct dri2_context *pcp = (struct dri2_context *) gc;
 707    __GLXDRIdrawable *base = GetGLXDRIDrawable(dpy, drawable);
 708    struct glx_display *dpyPriv = __glXInitialize(dpy);
 709    struct dri2_drawable *pdraw = (struct dri2_drawable *) base;
 710    struct dri2_display *pdp =
 711       (struct dri2_display *) dpyPriv->dri2Display;
 712    struct dri2_screen *psc;
 713
 714    if (pdraw != NULL) {
 715       psc = (struct dri2_screen *) base->psc;
 716
 717 #if __DRI2_FLUSH_VERSION >= 3
 718       if (!pdp->invalidateAvailable && psc->f &&
 719            psc->f->base.version >= 3 && psc->f->invalidate)
 720          psc->f->invalidate(pdraw->driDrawable);
 721 #endif
 722
 723       if (psc->texBuffer->base.version >= 2 &&
 724           psc->texBuffer->setTexBuffer2 != NULL) {
 725          (*psc->texBuffer->setTexBuffer2) (pcp->driContext,
 726                                            pdraw->base.textureTarget,
 727                                            pdraw->base.textureFormat,
 728                                            pdraw->driDrawable);
 729       }
 730       else {
 731          (*psc->texBuffer->setTexBuffer) (pcp->driContext,
 732                                           pdraw->base.textureTarget,
 733                                           pdraw->driDrawable);
 734       }
 735    }
 736 }
 737
 738 static void
 739 dri2_release_tex_image(Display * dpy, GLXDrawable drawable, int buffer)
 740 {
 741 #if __DRI_TEX_BUFFER_VERSION >= 3
 742    struct glx_context *gc = __glXGetCurrentContext();
 743    struct dri2_context *pcp = (struct dri2_context *) gc;
 744    __GLXDRIdrawable *base = GetGLXDRIDrawable(dpy, drawable);
 745    struct glx_display *dpyPriv = __glXInitialize(dpy);
 746    struct dri2_drawable *pdraw = (struct dri2_drawable *) base;
 747    struct dri2_display *pdp =
 748       (struct dri2_display *) dpyPriv->dri2Display;
 749    struct dri2_screen *psc;
 750
 751    if (pdraw != NULL) {
 752       psc = (struct dri2_screen *) base->psc;
 753
 754       if (psc->texBuffer->base.version >= 3 &&
 755           psc->texBuffer->releaseTexBuffer != NULL) {
 756          (*psc->texBuffer->releaseTexBuffer) (pcp->driContext,
 757                                            pdraw->base.textureTarget,
 758                                            pdraw->driDrawable);
 759       }
 760    }
 761 #endif
 762 }
 763
 764 static const struct glx_context_vtable dri2_context_vtable = {
 765    dri2_destroy_context,
 766    dri2_bind_context,
 767    dri2_unbind_context,
 768    dri2_wait_gl,
 769    dri2_wait_x,
 770    DRI_glXUseXFont,
 771    dri2_bind_tex_image,
 772    dri2_release_tex_image,
 773    NULL, /* get_proc_address */
 774 };
 775
 776 static void
 777 dri2BindExtensions(struct dri2_screen *psc, const __DRIextension **extensions)
 778 {
 779    int i;
 780
 781    __glXEnableDirectExtension(&psc->base, "GLX_SGI_video_sync");
 782    __glXEnableDirectExtension(&psc->base, "GLX_SGI_swap_control");
 783    __glXEnableDirectExtension(&psc->base, "GLX_MESA_swap_control");
 784    __glXEnableDirectExtension(&psc->base, "GLX_SGI_make_current_read");
 785
 786    /* FIXME: if DRI2 version supports it... */
 787    __glXEnableDirectExtension(&psc->base, "INTEL_swap_event");
 788
 789    for (i = 0; extensions[i]; i++) {
 790       if ((strcmp(extensions[i]->name, __DRI_TEX_BUFFER) == 0)) {
 791          psc->texBuffer = (__DRItexBufferExtension *) extensions[i];
 792          __glXEnableDirectExtension(&psc->base, "GLX_EXT_texture_from_pixmap");
 793       }
 794
 795       if ((strcmp(extensions[i]->name, __DRI2_FLUSH) == 0)) {
 796          psc->f = (__DRI2flushExtension *) extensions[i];
 797          /* internal driver extension, no GL extension exposed */
 798       }
 799
 800       if ((strcmp(extensions[i]->name, __DRI2_CONFIG_QUERY) == 0))
 801          psc->config = (__DRI2configQueryExtension *) extensions[i];
 802    }
 803 }
 804
 805 static const struct glx_screen_vtable dri2_screen_vtable = {
 806    dri2_create_context
 807 };
 808
 809 static struct glx_screen *
 810 dri2CreateScreen(int screen, struct glx_display * priv)
 811 {
 812    const __DRIconfig **driver_configs;
 813    const __DRIextension **extensions;
 814    const struct dri2_display *const pdp = (struct dri2_display *)
 815       priv->dri2Display;
 816    struct dri2_screen *psc;
 817    __GLXDRIscreen *psp;
 818    char *driverName, *deviceName;
 819    drm_magic_t magic;
 820    int i;
 821
 822    psc = Xmalloc(sizeof *psc);
 823    if (psc == NULL)
 824       return NULL;
 825
 826    memset(psc, 0, sizeof *psc);
 827    psc->fd = -1;
 828
 829    if (!glx_screen_init(&psc->base, screen, priv)) {
 830       Xfree(psc);
 831       return NULL;
 832    }
 833
 834    if (!DRI2Connect(priv->dpy, RootWindow(priv->dpy, screen),
 835                     &driverName, &deviceName)) {
 836       glx_screen_cleanup(&psc->base);
 837       XFree(psc);
 838       return NULL;
 839    }
 840
 841    psc->driver = driOpenDriver(driverName);
 842    if (psc->driver == NULL) {
 843       ErrorMessageF("driver pointer missing\n");
 844       goto handle_error;
 845    }
 846
 847    extensions = dlsym(psc->driver, __DRI_DRIVER_EXTENSIONS);
 848    if (extensions == NULL) {
 849       ErrorMessageF("driver exports no extensions (%s)\n", dlerror());
 850       goto handle_error;
 851    }
 852
 853    for (i = 0; extensions[i]; i++) {
 854       if (strcmp(extensions[i]->name, __DRI_CORE) == 0)
 855          psc->core = (__DRIcoreExtension *) extensions[i];
 856       if (strcmp(extensions[i]->name, __DRI_DRI2) == 0)
 857          psc->dri2 = (__DRIdri2Extension *) extensions[i];
 858    }
 859
 860    if (psc->core == NULL || psc->dri2 == NULL) {
 861       ErrorMessageF("core dri or dri2 extension not found\n");
 862       goto handle_error;
 863    }
 864
 865    psc->fd = open(deviceName, O_RDWR);
 866    if (psc->fd < 0) {
 867       ErrorMessageF("failed to open drm device: %s\n", strerror(errno));
 868       goto handle_error;
 869    }
 870
 871    if (drmGetMagic(psc->fd, &magic)) {
 872       ErrorMessageF("failed to get magic\n");
 873       goto handle_error;
 874    }
 875
 876    if (!DRI2Authenticate(priv->dpy, RootWindow(priv->dpy, screen), magic)) {
 877       ErrorMessageF("failed to authenticate magic %d\n", magic);
 878       goto handle_error;
 879    }
 880
 881
 882    /* If the server does not support the protocol for
 883     * DRI2GetBuffersWithFormat, don't supply that interface to the driver.
 884     */
 885    psc->driScreen =
 886       psc->dri2->createNewScreen(screen, psc->fd,
 887                                  (const __DRIextension **)
 888                                  &pdp->loader_extensions[0],
 889                                  &driver_configs, psc);
 890
 891    if (psc->driScreen == NULL) {
 892       ErrorMessageF("failed to create dri screen\n");
 893       goto handle_error;
 894    }
 895
 896    extensions = psc->core->getExtensions(psc->driScreen);
 897    dri2BindExtensions(psc, extensions);
 898
 899    psc->base.configs =
 900       driConvertConfigs(psc->core, psc->base.configs, driver_configs);
 901    psc->base.visuals =
 902       driConvertConfigs(psc->core, psc->base.visuals, driver_configs);
 903
 904    psc->driver_configs = driver_configs;
 905
 906    psc->base.vtable = &dri2_screen_vtable;
 907    psp = &psc->vtable;
 908    psc->base.driScreen = psp;
 909    psp->destroyScreen = dri2DestroyScreen;
 910    psp->createDrawable = dri2CreateDrawable;
 911    psp->swapBuffers = dri2SwapBuffers;
 912    psp->getDrawableMSC = NULL;
 913    psp->waitForMSC = NULL;
 914    psp->waitForSBC = NULL;
 915    psp->setSwapInterval = NULL;
 916    psp->getSwapInterval = NULL;
 917
 918    if (pdp->driMinor >= 2) {
 919 #ifdef X_DRI2GetMSC
 920       psp->getDrawableMSC = dri2DrawableGetMSC;
 921 #endif
 922 #ifdef X_DRI2WaitMSC
 923       psp->waitForMSC = dri2WaitForMSC;
 924       psp->waitForSBC = dri2WaitForSBC;
 925 #endif
 926 #ifdef X_DRI2SwapInterval
 927       psp->setSwapInterval = dri2SetSwapInterval;
 928       psp->getSwapInterval = dri2GetSwapInterval;
 929 #endif
 930 #if defined(X_DRI2GetMSC) && defined(X_DRI2WaitMSC) && defined(X_DRI2SwapInterval)
 931       __glXEnableDirectExtension(&psc->base, "GLX_OML_sync_control");
 932 #endif
 933    }
 934
 935    /* DRI2 suports SubBuffer through DRI2CopyRegion, so it's always
 936     * available.*/
 937    psp->copySubBuffer = dri2CopySubBuffer;
 938    __glXEnableDirectExtension(&psc->base, "GLX_MESA_copy_sub_buffer");
 939
 940    Xfree(driverName);
 941    Xfree(deviceName);
 942
 943    return &psc->base;
 944
 945 handle_error:
 946    if (psc->fd >= 0)
 947       close(psc->fd);
 948    if (psc->driver)
 949       dlclose(psc->driver);
 950    Xfree(driverName);
 951    Xfree(deviceName);
 952    glx_screen_cleanup(&psc->base);
 953    XFree(psc);
 954
 955    return NULL;
 956 }
 957
 958 /* Called from __glXFreeDisplayPrivate.
 959  */
 960 static void
 961 dri2DestroyDisplay(__GLXDRIdisplay * dpy)
 962 {
 963    struct dri2_display *pdp = (struct dri2_display *) dpy;
 964
 965    __glxHashDestroy(pdp->dri2Hash);
 966    Xfree(dpy);
 967 }
 968
 969 _X_HIDDEN __GLXDRIdrawable *
 970 dri2GetGlxDrawableFromXDrawableId(Display *dpy, XID id)
 971 {
 972    struct glx_display *d = __glXInitialize(dpy);
 973    struct dri2_display *pdp = (struct dri2_display *) d->dri2Display;
 974    __GLXDRIdrawable *pdraw;
 975
 976    if (__glxHashLookup(pdp->dri2Hash, id, (void *) &pdraw) == 0)
 977       return pdraw;
 978
 979    return NULL;
 980 }
 981
 982 /*
 983  * Allocate, initialize and return a __DRIdisplayPrivate object.
 984  * This is called from __glXInitialize() when we are given a new
 985  * display pointer.
 986  */
 987 _X_HIDDEN __GLXDRIdisplay *
 988 dri2CreateDisplay(Display * dpy)
 989 {
 990    struct dri2_display *pdp;
 991    int eventBase, errorBase, i;
 992
 993    if (!DRI2QueryExtension(dpy, &eventBase, &errorBase))
 994       return NULL;
 995
 996    pdp = Xmalloc(sizeof *pdp);
 997    if (pdp == NULL)
 998       return NULL;
 999
1000    if (!DRI2QueryVersion(dpy, &pdp->driMajor, &pdp->driMinor)) {
1001       Xfree(pdp);
1002       return NULL;
1003    }
1004
1005    pdp->driPatch = 0;
1006    pdp->swapAvailable = (pdp->driMinor >= 2);
1007    pdp->invalidateAvailable = (pdp->driMinor >= 3);
1008
1009    pdp->base.destroyDisplay = dri2DestroyDisplay;
1010    pdp->base.createScreen = dri2CreateScreen;
1011
1012    i = 0;
1013    if (pdp->driMinor < 1)
1014       pdp->loader_extensions[i++] = &dri2LoaderExtension_old.base;
1015    else
1016       pdp->loader_extensions[i++] = &dri2LoaderExtension.base;
1017
1018    pdp->loader_extensions[i++] = &systemTimeExtension.base;
1019
1020 #ifdef __DRI_USE_INVALIDATE
1021    pdp->loader_extensions[i++] = &dri2UseInvalidate.base;
1022 #endif
1023    pdp->loader_extensions[i++] = NULL;
1024
1025    pdp->dri2Hash = __glxHashCreate();
1026    if (pdp->dri2Hash == NULL) {
1027       Xfree(pdp);
1028       return NULL;
1029    }
1030
1031    return &pdp->base;
1032 }
1033
1034 #endif /* GLX_DIRECT_RENDERING */