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