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    __GLXDRIcontext dri_vtable;
  99    __DRIcontext *driContext;
 100 };
 101
 102 struct dri2_drawable
 103 {
 104    __GLXDRIdrawable base;
 105    __DRIdrawable *driDrawable;
 106    __DRIbuffer buffers[5];
 107    int bufferCount;
 108    int width, height;
 109    int have_back;
 110    int have_fake_front;
 111    int swap_interval;
 112 };
 113
 114 static const struct glx_context_vtable dri2_context_vtable;
 115
 116 static void
 117 dri2_destroy_context(struct glx_context *context)
 118 {
 119    struct dri2_context *pcp = (struct dri2_context *) context;
 120    struct dri2_screen *psc = (struct dri2_screen *) context->psc;
 121
 122    if (context->xid)
 123       glx_send_destroy_context(psc->base.dpy, context->xid);
 124
 125    if (context->extensions)
 126       XFree((char *) context->extensions);
 127
 128    GarbageCollectDRIDrawables(context->psc);
 129
 130    (*psc->core->destroyContext) (pcp->driContext);
 131
 132    Xfree(pcp);
 133 }
 134
 135 static Bool
 136 dri2BindContext(struct glx_context *context,
 137                 __GLXDRIdrawable *draw, __GLXDRIdrawable *read)
 138 {
 139    struct dri2_context *pcp = (struct dri2_context *) context;
 140    struct dri2_screen *psc = (struct dri2_screen *) pcp->base.psc;
 141    struct dri2_drawable *pdr = (struct dri2_drawable *) draw;
 142    struct dri2_drawable *prd = (struct dri2_drawable *) read;
 143
 144    return (*psc->core->bindContext) (pcp->driContext,
 145                                      pdr->driDrawable, prd->driDrawable);
 146 }
 147
 148 static void
 149 dri2UnbindContext(struct glx_context *context)
 150 {
 151    struct dri2_context *pcp = (struct dri2_context *) context;
 152    struct dri2_screen *psc = (struct dri2_screen *) pcp->base.psc;
 153
 154    (*psc->core->unbindContext) (pcp->driContext);
 155 }
 156
 157 static struct glx_context *
 158 dri2_create_context(struct glx_screen *base,
 159                     struct glx_config *config_base,
 160                     struct glx_context *shareList, int renderType)
 161 {
 162    struct dri2_context *pcp, *pcp_shared;
 163    struct dri2_screen *psc = (struct dri2_screen *) base;
 164    __GLXDRIconfigPrivate *config = (__GLXDRIconfigPrivate *) config_base;
 165    __DRIcontext *shared = NULL;
 166
 167    if (shareList) {
 168       pcp_shared = (struct dri2_context *) shareList;
 169       shared = pcp_shared->driContext;
 170    }
 171
 172    pcp = Xmalloc(sizeof *pcp);
 173    if (pcp == NULL)
 174       return NULL;
 175
 176    memset(pcp, 0, sizeof *pcp);
 177    if (!glx_context_init(&pcp->base, &psc->base, &config->base)) {
 178       Xfree(pcp);
 179       return NULL;
 180    }
 181
 182    pcp->driContext =
 183       (*psc->dri2->createNewContext) (psc->driScreen,
 184                                       config->driConfig, shared, pcp);
 185
 186    if (pcp->driContext == NULL) {
 187       Xfree(pcp);
 188       return NULL;
 189    }
 190
 191    pcp->base.vtable = &dri2_context_vtable;
 192    pcp->base.driContext = &pcp->dri_vtable;
 193    pcp->dri_vtable.bindContext = dri2BindContext;
 194    pcp->dri_vtable.unbindContext = dri2UnbindContext;
 195
 196    return &pcp->base;
 197 }
 198
 199 static void
 200 dri2DestroyDrawable(__GLXDRIdrawable *base)
 201 {
 202    struct dri2_screen *psc = (struct dri2_screen *) base->psc;
 203    struct dri2_drawable *pdraw = (struct dri2_drawable *) base;
 204    struct glx_display *dpyPriv = psc->base.display;
 205    struct dri2_display *pdp = (struct dri2_display *)dpyPriv->dri2Display;
 206
 207    __glxHashDelete(pdp->dri2Hash, pdraw->base.xDrawable);
 208    (*psc->core->destroyDrawable) (pdraw->driDrawable);
 209    DRI2DestroyDrawable(psc->base.dpy, pdraw->base.xDrawable);
 210    Xfree(pdraw);
 211 }
 212
 213 static __GLXDRIdrawable *
 214 dri2CreateDrawable(struct glx_screen *base, XID xDrawable,
 215                    GLXDrawable drawable, struct glx_config *config_base)
 216 {
 217    struct dri2_drawable *pdraw;
 218    struct dri2_screen *psc = (struct dri2_screen *) base;
 219    __GLXDRIconfigPrivate *config = (__GLXDRIconfigPrivate *) config_base;
 220    struct glx_display *dpyPriv;
 221    struct dri2_display *pdp;
 222    GLint vblank_mode = DRI_CONF_VBLANK_DEF_INTERVAL_1;
 223
 224    pdraw = Xmalloc(sizeof(*pdraw));
 225    if (!pdraw)
 226       return NULL;
 227
 228    memset(pdraw, 0, sizeof *pdraw);
 229    pdraw->base.destroyDrawable = dri2DestroyDrawable;
 230    pdraw->base.xDrawable = xDrawable;
 231    pdraw->base.drawable = drawable;
 232    pdraw->base.psc = &psc->base;
 233    pdraw->bufferCount = 0;
 234    pdraw->swap_interval = 1; /* default may be overridden below */
 235    pdraw->have_back = 0;
 236
 237    if (psc->config)
 238       psc->config->configQueryi(psc->driScreen,
 239                                 "vblank_mode", &vblank_mode);
 240
 241    switch (vblank_mode) {
 242    case DRI_CONF_VBLANK_NEVER:
 243    case DRI_CONF_VBLANK_DEF_INTERVAL_0:
 244       pdraw->swap_interval = 0;
 245       break;
 246    case DRI_CONF_VBLANK_DEF_INTERVAL_1:
 247    case DRI_CONF_VBLANK_ALWAYS_SYNC:
 248    default:
 249       pdraw->swap_interval = 1;
 250       break;
 251    }
 252
 253    DRI2CreateDrawable(psc->base.dpy, xDrawable);
 254
 255    dpyPriv = __glXInitialize(psc->base.dpy);
 256    pdp = (struct dri2_display *)dpyPriv->dri2Display;;
 257    /* Create a new drawable */
 258    pdraw->driDrawable =
 259       (*psc->dri2->createNewDrawable) (psc->driScreen,
 260                                        config->driConfig, pdraw);
 261
 262    if (!pdraw->driDrawable) {
 263       DRI2DestroyDrawable(psc->base.dpy, xDrawable);
 264       Xfree(pdraw);
 265       return NULL;
 266    }
 267
 268    if (__glxHashInsert(pdp->dri2Hash, xDrawable, pdraw)) {
 269       (*psc->core->destroyDrawable) (pdraw->driDrawable);
 270       DRI2DestroyDrawable(psc->base.dpy, xDrawable);
 271       Xfree(pdraw);
 272       return None;
 273    }
 274
 275
 276 #ifdef X_DRI2SwapInterval
 277    /*
 278     * Make sure server has the same swap interval we do for the new
 279     * drawable.
 280     */
 281    if (pdp->swapAvailable)
 282       DRI2SwapInterval(psc->base.dpy, xDrawable, pdraw->swap_interval);
 283 #endif
 284
 285    return &pdraw->base;
 286 }
 287
 288 #ifdef X_DRI2GetMSC
 289
 290 static int
 291 dri2DrawableGetMSC(struct glx_screen *psc, __GLXDRIdrawable *pdraw,
 292                    int64_t *ust, int64_t *msc, int64_t *sbc)
 293 {
 294    CARD64 dri2_ust, dri2_msc, dri2_sbc;
 295    int ret;
 296
 297    ret = DRI2GetMSC(psc->dpy, pdraw->xDrawable,
 298                     &dri2_ust, &dri2_msc, &dri2_sbc);
 299    *ust = dri2_ust;
 300    *msc = dri2_msc;
 301    *sbc = dri2_sbc;
 302
 303    return ret;
 304 }
 305
 306 #endif
 307
 308
 309 #ifdef X_DRI2WaitMSC
 310
 311 static int
 312 dri2WaitForMSC(__GLXDRIdrawable *pdraw, int64_t target_msc, int64_t divisor,
 313                int64_t remainder, int64_t *ust, int64_t *msc, int64_t *sbc)
 314 {
 315    CARD64 dri2_ust, dri2_msc, dri2_sbc;
 316    int ret;
 317
 318    ret = DRI2WaitMSC(pdraw->psc->dpy, pdraw->xDrawable, target_msc, divisor,
 319                      remainder, &dri2_ust, &dri2_msc, &dri2_sbc);
 320    *ust = dri2_ust;
 321    *msc = dri2_msc;
 322    *sbc = dri2_sbc;
 323
 324    return ret;
 325 }
 326
 327 static int
 328 dri2WaitForSBC(__GLXDRIdrawable *pdraw, int64_t target_sbc, int64_t *ust,
 329                int64_t *msc, int64_t *sbc)
 330 {
 331    CARD64 dri2_ust, dri2_msc, dri2_sbc;
 332    int ret;
 333
 334    ret = DRI2WaitSBC(pdraw->psc->dpy, pdraw->xDrawable,
 335                      target_sbc, &dri2_ust, &dri2_msc, &dri2_sbc);
 336    *ust = dri2_ust;
 337    *msc = dri2_msc;
 338    *sbc = dri2_sbc;
 339
 340    return ret;
 341 }
 342
 343 #endif /* X_DRI2WaitMSC */
 344
 345 static void
 346 dri2CopySubBuffer(__GLXDRIdrawable *pdraw, int x, int y, int width, int height)
 347 {
 348    struct dri2_drawable *priv = (struct dri2_drawable *) pdraw;
 349    struct dri2_screen *psc = (struct dri2_screen *) pdraw->psc;
 350    XRectangle xrect;
 351    XserverRegion region;
 352
 353    /* Check we have the right attachments */
 354    if (!priv->have_back)
 355       return;
 356
 357    xrect.x = x;
 358    xrect.y = priv->height - y - height;
 359    xrect.width = width;
 360    xrect.height = height;
 361
 362 #ifdef __DRI2_FLUSH
 363    if (psc->f)
 364       (*psc->f->flush) (priv->driDrawable);
 365 #endif
 366
 367    region = XFixesCreateRegion(psc->base.dpy, &xrect, 1);
 368    DRI2CopyRegion(psc->base.dpy, pdraw->xDrawable, region,
 369                   DRI2BufferFrontLeft, DRI2BufferBackLeft);
 370
 371    /* Refresh the fake front (if present) after we just damaged the real
 372     * front.
 373     */
 374    if (priv->have_fake_front)
 375       DRI2CopyRegion(psc->base.dpy, pdraw->xDrawable, region,
 376                      DRI2BufferFakeFrontLeft, DRI2BufferFrontLeft);
 377
 378    XFixesDestroyRegion(psc->base.dpy, region);
 379 }
 380
 381 static void
 382 dri2_copy_drawable(struct dri2_drawable *priv, int dest, int src)
 383 {
 384    XRectangle xrect;
 385    XserverRegion region;
 386    struct dri2_screen *psc = (struct dri2_screen *) priv->base.psc;
 387
 388    xrect.x = 0;
 389    xrect.y = 0;
 390    xrect.width = priv->width;
 391    xrect.height = priv->height;
 392
 393 #ifdef __DRI2_FLUSH
 394    if (psc->f)
 395       (*psc->f->flush) (priv->driDrawable);
 396 #endif
 397
 398    region = XFixesCreateRegion(psc->base.dpy, &xrect, 1);
 399    DRI2CopyRegion(psc->base.dpy, priv->base.xDrawable, region, dest, src);
 400    XFixesDestroyRegion(psc->base.dpy, region);
 401
 402 }
 403
 404 static void
 405 dri2_wait_x(struct glx_context *gc)
 406 {
 407    struct dri2_drawable *priv = (struct dri2_drawable *)
 408       GetGLXDRIDrawable(gc->currentDpy, gc->currentDrawable);
 409
 410    if (priv == NULL || !priv->have_fake_front)
 411       return;
 412
 413    dri2_copy_drawable(priv, DRI2BufferFakeFrontLeft, DRI2BufferFrontLeft);
 414 }
 415
 416 static void
 417 dri2_wait_gl(struct glx_context *gc)
 418 {
 419    struct dri2_drawable *priv = (struct dri2_drawable *)
 420       GetGLXDRIDrawable(gc->currentDpy, gc->currentDrawable);
 421
 422    if (priv == NULL || !priv->have_fake_front)
 423       return;
 424
 425    dri2_copy_drawable(priv, DRI2BufferFrontLeft, DRI2BufferFakeFrontLeft);
 426 }
 427
 428 static void
 429 dri2FlushFrontBuffer(__DRIdrawable *driDrawable, void *loaderPrivate)
 430 {
 431    struct dri2_drawable *pdraw = loaderPrivate;
 432    struct glx_display *priv = __glXInitialize(pdraw->base.psc->dpy);
 433    struct dri2_display *pdp = (struct dri2_display *)priv->dri2Display;
 434    struct glx_context *gc = __glXGetCurrentContext();
 435
 436    /* Old servers don't send invalidate events */
 437    if (!pdp->invalidateAvailable)
 438        dri2InvalidateBuffers(priv->dpy, pdraw->base.drawable);
 439
 440    dri2_wait_gl(gc);
 441 }
 442
 443
 444 static void
 445 dri2DestroyScreen(struct glx_screen *base)
 446 {
 447    struct dri2_screen *psc = (struct dri2_screen *) base;
 448
 449    /* Free the direct rendering per screen data */
 450    (*psc->core->destroyScreen) (psc->driScreen);
 451    driDestroyConfigs(psc->driver_configs);
 452    close(psc->fd);
 453    Xfree(psc);
 454 }
 455
 456 /**
 457  * Process list of buffer received from the server
 458  *
 459  * Processes the list of buffers received in a reply from the server to either
 460  * \c DRI2GetBuffers or \c DRI2GetBuffersWithFormat.
 461  */
 462 static void
 463 process_buffers(struct dri2_drawable * pdraw, DRI2Buffer * buffers,
 464                 unsigned count)
 465 {
 466    int i;
 467
 468    pdraw->bufferCount = count;
 469    pdraw->have_fake_front = 0;
 470    pdraw->have_back = 0;
 471
 472    /* This assumes the DRI2 buffer attachment tokens matches the
 473     * __DRIbuffer tokens. */
 474    for (i = 0; i < count; i++) {
 475       pdraw->buffers[i].attachment = buffers[i].attachment;
 476       pdraw->buffers[i].name = buffers[i].name;
 477       pdraw->buffers[i].pitch = buffers[i].pitch;
 478       pdraw->buffers[i].cpp = buffers[i].cpp;
 479       pdraw->buffers[i].flags = buffers[i].flags;
 480       if (pdraw->buffers[i].attachment == __DRI_BUFFER_FAKE_FRONT_LEFT)
 481          pdraw->have_fake_front = 1;
 482       if (pdraw->buffers[i].attachment == __DRI_BUFFER_BACK_LEFT)
 483          pdraw->have_back = 1;
 484    }
 485
 486 }
 487
 488 static int64_t
 489 dri2SwapBuffers(__GLXDRIdrawable *pdraw, int64_t target_msc, int64_t divisor,
 490                 int64_t remainder)
 491 {
 492     struct dri2_drawable *priv = (struct dri2_drawable *) pdraw;
 493     struct glx_display *dpyPriv = __glXInitialize(priv->base.psc->dpy);
 494     struct dri2_screen *psc = (struct dri2_screen *) priv->base.psc;
 495     struct dri2_display *pdp =
 496         (struct dri2_display *)dpyPriv->dri2Display;
 497     CARD64 ret = 0;
 498
 499 #ifdef __DRI2_FLUSH
 500     if (psc->f)
 501         (*psc->f->flush)(priv->driDrawable);
 502 #endif
 503
 504     /* Old servers don't send invalidate events */
 505     if (!pdp->invalidateAvailable)
 506        dri2InvalidateBuffers(dpyPriv->dpy, pdraw->drawable);
 507
 508     /* Old servers can't handle swapbuffers */
 509     if (!pdp->swapAvailable) {
 510        dri2CopySubBuffer(pdraw, 0, 0, priv->width, priv->height);
 511        return 0;
 512     }
 513
 514 #ifdef X_DRI2SwapBuffers
 515     DRI2SwapBuffers(psc->base.dpy, pdraw->xDrawable, target_msc, divisor,
 516                     remainder, &ret);
 517 #endif
 518
 519     return ret;
 520 }
 521
 522 static __DRIbuffer *
 523 dri2GetBuffers(__DRIdrawable * driDrawable,
 524                int *width, int *height,
 525                unsigned int *attachments, int count,
 526                int *out_count, void *loaderPrivate)
 527 {
 528    struct dri2_drawable *pdraw = loaderPrivate;
 529    DRI2Buffer *buffers;
 530
 531    buffers = DRI2GetBuffers(pdraw->base.psc->dpy, pdraw->base.xDrawable,
 532                             width, height, attachments, count, out_count);
 533    if (buffers == NULL)
 534       return NULL;
 535
 536    pdraw->width = *width;
 537    pdraw->height = *height;
 538    process_buffers(pdraw, buffers, *out_count);
 539
 540    Xfree(buffers);
 541
 542    return pdraw->buffers;
 543 }
 544
 545 static __DRIbuffer *
 546 dri2GetBuffersWithFormat(__DRIdrawable * driDrawable,
 547                          int *width, int *height,
 548                          unsigned int *attachments, int count,
 549                          int *out_count, void *loaderPrivate)
 550 {
 551    struct dri2_drawable *pdraw = loaderPrivate;
 552    DRI2Buffer *buffers;
 553
 554    buffers = DRI2GetBuffersWithFormat(pdraw->base.psc->dpy,
 555                                       pdraw->base.xDrawable,
 556                                       width, height, attachments,
 557                                       count, out_count);
 558    if (buffers == NULL)
 559       return NULL;
 560
 561    pdraw->width = *width;
 562    pdraw->height = *height;
 563    process_buffers(pdraw, buffers, *out_count);
 564
 565    Xfree(buffers);
 566
 567    return pdraw->buffers;
 568 }
 569
 570 #ifdef X_DRI2SwapInterval
 571
 572 static int
 573 dri2SetSwapInterval(__GLXDRIdrawable *pdraw, int interval)
 574 {
 575    struct dri2_drawable *priv =  (struct dri2_drawable *) pdraw;
 576    GLint vblank_mode = DRI_CONF_VBLANK_DEF_INTERVAL_1;
 577    struct dri2_screen *psc = (struct dri2_screen *) priv->base.psc;
 578
 579    if (psc->config)
 580       psc->config->configQueryi(psc->driScreen,
 581                                 "vblank_mode", &vblank_mode);
 582
 583    switch (vblank_mode) {
 584    case DRI_CONF_VBLANK_NEVER:
 585       return GLX_BAD_VALUE;
 586    case DRI_CONF_VBLANK_ALWAYS_SYNC:
 587       if (interval <= 0)
 588          return GLX_BAD_VALUE;
 589       break;
 590    default:
 591       break;
 592    }
 593
 594    DRI2SwapInterval(priv->base.psc->dpy, priv->base.xDrawable, interval);
 595    priv->swap_interval = interval;
 596
 597    return 0;
 598 }
 599
 600 static int
 601 dri2GetSwapInterval(__GLXDRIdrawable *pdraw)
 602 {
 603    struct dri2_drawable *priv =  (struct dri2_drawable *) pdraw;
 604
 605   return priv->swap_interval;
 606 }
 607
 608 #endif /* X_DRI2SwapInterval */
 609
 610 static const __DRIdri2LoaderExtension dri2LoaderExtension = {
 611    {__DRI_DRI2_LOADER, __DRI_DRI2_LOADER_VERSION},
 612    dri2GetBuffers,
 613    dri2FlushFrontBuffer,
 614    dri2GetBuffersWithFormat,
 615 };
 616
 617 static const __DRIdri2LoaderExtension dri2LoaderExtension_old = {
 618    {__DRI_DRI2_LOADER, __DRI_DRI2_LOADER_VERSION},
 619    dri2GetBuffers,
 620    dri2FlushFrontBuffer,
 621    NULL,
 622 };
 623
 624 #ifdef __DRI_USE_INVALIDATE
 625 static const __DRIuseInvalidateExtension dri2UseInvalidate = {
 626    { __DRI_USE_INVALIDATE, __DRI_USE_INVALIDATE_VERSION }
 627 };
 628 #endif
 629
 630 _X_HIDDEN void
 631 dri2InvalidateBuffers(Display *dpy, XID drawable)
 632 {
 633    __GLXDRIdrawable *pdraw =
 634       dri2GetGlxDrawableFromXDrawableId(dpy, drawable);
 635    struct dri2_screen *psc = (struct dri2_screen *) pdraw->psc;
 636    struct dri2_drawable *pdp = (struct dri2_drawable *) pdraw;
 637
 638 #if __DRI2_FLUSH_VERSION >= 3
 639    if (pdraw && psc->f)
 640        psc->f->invalidate(pdp->driDrawable);
 641 #endif
 642 }
 643
 644 static void
 645 dri2_bind_tex_image(Display * dpy,
 646                     GLXDrawable drawable,
 647                     int buffer, const int *attrib_list)
 648 {
 649    struct glx_context *gc = __glXGetCurrentContext();
 650    struct dri2_context *pcp = (struct dri2_context *) gc;
 651    __GLXDRIdrawable *base = GetGLXDRIDrawable(dpy, drawable);
 652    struct glx_display *dpyPriv = __glXInitialize(dpy);
 653    struct dri2_drawable *pdraw = (struct dri2_drawable *) base;
 654    struct dri2_display *pdp =
 655       (struct dri2_display *) dpyPriv->dri2Display;
 656    struct dri2_screen *psc = (struct dri2_screen *) base->psc;
 657
 658    if (pdraw != NULL) {
 659
 660 #if __DRI2_FLUSH_VERSION >= 3
 661       if (!pdp->invalidateAvailable && psc->f)
 662          psc->f->invalidate(pdraw->driDrawable);
 663 #endif
 664
 665       if (psc->texBuffer->base.version >= 2 &&
 666           psc->texBuffer->setTexBuffer2 != NULL) {
 667          (*psc->texBuffer->setTexBuffer2) (pcp->driContext,
 668                                            pdraw->base.textureTarget,
 669                                            pdraw->base.textureFormat,
 670                                            pdraw->driDrawable);
 671       }
 672       else {
 673          (*psc->texBuffer->setTexBuffer) (pcp->driContext,
 674                                           pdraw->base.textureTarget,
 675                                           pdraw->driDrawable);
 676       }
 677    }
 678 }
 679
 680 static void
 681 dri2_release_tex_image(Display * dpy, GLXDrawable drawable, int buffer)
 682 {
 683 }
 684
 685 static const struct glx_context_vtable dri2_context_vtable = {
 686    dri2_destroy_context,
 687    dri2_wait_gl,
 688    dri2_wait_x,
 689    DRI_glXUseXFont,
 690    dri2_bind_tex_image,
 691    dri2_release_tex_image,
 692 };
 693
 694 static void
 695 dri2BindExtensions(struct dri2_screen *psc, const __DRIextension **extensions)
 696 {
 697    int i;
 698
 699    __glXEnableDirectExtension(&psc->base, "GLX_SGI_video_sync");
 700    __glXEnableDirectExtension(&psc->base, "GLX_SGI_swap_control");
 701    __glXEnableDirectExtension(&psc->base, "GLX_MESA_swap_control");
 702    __glXEnableDirectExtension(&psc->base, "GLX_SGI_make_current_read");
 703
 704    /* FIXME: if DRI2 version supports it... */
 705    __glXEnableDirectExtension(&psc->base, "INTEL_swap_event");
 706
 707    for (i = 0; extensions[i]; i++) {
 708       if ((strcmp(extensions[i]->name, __DRI_TEX_BUFFER) == 0)) {
 709          psc->texBuffer = (__DRItexBufferExtension *) extensions[i];
 710          __glXEnableDirectExtension(&psc->base, "GLX_EXT_texture_from_pixmap");
 711       }
 712
 713       if ((strcmp(extensions[i]->name, __DRI2_FLUSH) == 0)) {
 714          psc->f = (__DRI2flushExtension *) extensions[i];
 715          /* internal driver extension, no GL extension exposed */
 716       }
 717
 718       if ((strcmp(extensions[i]->name, __DRI2_CONFIG_QUERY) == 0))
 719          psc->config = (__DRI2configQueryExtension *) extensions[i];
 720    }
 721 }
 722
 723 static const struct glx_screen_vtable dri2_screen_vtable = {
 724    dri2_create_context
 725 };
 726
 727 static struct glx_screen *
 728 dri2CreateScreen(int screen, struct glx_display * priv)
 729 {
 730    const __DRIconfig **driver_configs;
 731    const __DRIextension **extensions;
 732    const struct dri2_display *const pdp = (struct dri2_display *)
 733       priv->dri2Display;
 734    struct dri2_screen *psc;
 735    __GLXDRIscreen *psp;
 736    char *driverName, *deviceName;
 737    drm_magic_t magic;
 738    int i;
 739
 740    psc = Xmalloc(sizeof *psc);
 741    if (psc == NULL)
 742       return NULL;
 743
 744    memset(psc, 0, sizeof *psc);
 745    if (!glx_screen_init(&psc->base, screen, priv))
 746        return NULL;
 747
 748    if (!DRI2Connect(priv->dpy, RootWindow(priv->dpy, screen),
 749                     &driverName, &deviceName)) {
 750       XFree(psc);
 751       return NULL;
 752    }
 753
 754    psc->driver = driOpenDriver(driverName);
 755    if (psc->driver == NULL) {
 756       ErrorMessageF("driver pointer missing\n");
 757       goto handle_error;
 758    }
 759
 760    extensions = dlsym(psc->driver, __DRI_DRIVER_EXTENSIONS);
 761    if (extensions == NULL) {
 762       ErrorMessageF("driver exports no extensions (%s)\n", dlerror());
 763       goto handle_error;
 764    }
 765
 766    for (i = 0; extensions[i]; i++) {
 767       if (strcmp(extensions[i]->name, __DRI_CORE) == 0)
 768          psc->core = (__DRIcoreExtension *) extensions[i];
 769       if (strcmp(extensions[i]->name, __DRI_DRI2) == 0)
 770          psc->dri2 = (__DRIdri2Extension *) extensions[i];
 771    }
 772
 773    if (psc->core == NULL || psc->dri2 == NULL) {
 774       ErrorMessageF("core dri or dri2 extension not found\n");
 775       goto handle_error;
 776    }
 777
 778    psc->fd = open(deviceName, O_RDWR);
 779    if (psc->fd < 0) {
 780       ErrorMessageF("failed to open drm device: %s\n", strerror(errno));
 781       goto handle_error;
 782    }
 783
 784    if (drmGetMagic(psc->fd, &magic)) {
 785       ErrorMessageF("failed to get magic\n");
 786       goto handle_error;
 787    }
 788
 789    if (!DRI2Authenticate(priv->dpy, RootWindow(priv->dpy, screen), magic)) {
 790       ErrorMessageF("failed to authenticate magic %d\n", magic);
 791       goto handle_error;
 792    }
 793
 794
 795    /* If the server does not support the protocol for
 796     * DRI2GetBuffersWithFormat, don't supply that interface to the driver.
 797     */
 798    psc->driScreen =
 799       psc->dri2->createNewScreen(screen, psc->fd,
 800                                  (const __DRIextension **)
 801                                  &pdp->loader_extensions[0],
 802                                  &driver_configs, psc);
 803
 804    if (psc->driScreen == NULL) {
 805       ErrorMessageF("failed to create dri screen\n");
 806       goto handle_error;
 807    }
 808
 809    extensions = psc->core->getExtensions(psc->driScreen);
 810    dri2BindExtensions(psc, extensions);
 811
 812    psc->base.configs =
 813       driConvertConfigs(psc->core, psc->base.configs, driver_configs);
 814    psc->base.visuals =
 815       driConvertConfigs(psc->core, psc->base.visuals, driver_configs);
 816
 817    psc->driver_configs = driver_configs;
 818
 819    psc->base.vtable = &dri2_screen_vtable;
 820    psp = &psc->vtable;
 821    psc->base.driScreen = psp;
 822    psp->destroyScreen = dri2DestroyScreen;
 823    psp->createDrawable = dri2CreateDrawable;
 824    psp->swapBuffers = dri2SwapBuffers;
 825    psp->getDrawableMSC = NULL;
 826    psp->waitForMSC = NULL;
 827    psp->waitForSBC = NULL;
 828    psp->setSwapInterval = NULL;
 829    psp->getSwapInterval = NULL;
 830
 831    if (pdp->driMinor >= 2) {
 832 #ifdef X_DRI2GetMSC
 833       psp->getDrawableMSC = dri2DrawableGetMSC;
 834 #endif
 835 #ifdef X_DRI2WaitMSC
 836       psp->waitForMSC = dri2WaitForMSC;
 837       psp->waitForSBC = dri2WaitForSBC;
 838 #endif
 839 #ifdef X_DRI2SwapInterval
 840       psp->setSwapInterval = dri2SetSwapInterval;
 841       psp->getSwapInterval = dri2GetSwapInterval;
 842 #endif
 843 #if defined(X_DRI2GetMSC) && defined(X_DRI2WaitMSC) && defined(X_DRI2SwapInterval)
 844       __glXEnableDirectExtension(&psc->base, "GLX_OML_sync_control");
 845 #endif
 846    }
 847
 848    /* DRI2 suports SubBuffer through DRI2CopyRegion, so it's always
 849     * available.*/
 850    psp->copySubBuffer = dri2CopySubBuffer;
 851    __glXEnableDirectExtension(&psc->base, "GLX_MESA_copy_sub_buffer");
 852
 853    Xfree(driverName);
 854    Xfree(deviceName);
 855
 856    return &psc->base;
 857
 858 handle_error:
 859    Xfree(driverName);
 860    Xfree(deviceName);
 861    XFree(psc);
 862
 863    /* FIXME: clean up here */
 864
 865    return NULL;
 866 }
 867
 868 /* Called from __glXFreeDisplayPrivate.
 869  */
 870 static void
 871 dri2DestroyDisplay(__GLXDRIdisplay * dpy)
 872 {
 873    Xfree(dpy);
 874 }
 875
 876 _X_HIDDEN __GLXDRIdrawable *
 877 dri2GetGlxDrawableFromXDrawableId(Display *dpy, XID id)
 878 {
 879    struct glx_display *d = __glXInitialize(dpy);
 880    struct dri2_display *pdp = (struct dri2_display *) d->dri2Display;
 881    __GLXDRIdrawable *pdraw;
 882
 883    if (__glxHashLookup(pdp->dri2Hash, id, (void *) &pdraw) == 0)
 884       return pdraw;
 885
 886    return NULL;
 887 }
 888
 889 /*
 890  * Allocate, initialize and return a __DRIdisplayPrivate object.
 891  * This is called from __glXInitialize() when we are given a new
 892  * display pointer.
 893  */
 894 _X_HIDDEN __GLXDRIdisplay *
 895 dri2CreateDisplay(Display * dpy)
 896 {
 897    struct dri2_display *pdp;
 898    int eventBase, errorBase, i;
 899
 900    if (!DRI2QueryExtension(dpy, &eventBase, &errorBase))
 901       return NULL;
 902
 903    pdp = Xmalloc(sizeof *pdp);
 904    if (pdp == NULL)
 905       return NULL;
 906
 907    if (!DRI2QueryVersion(dpy, &pdp->driMajor, &pdp->driMinor)) {
 908       Xfree(pdp);
 909       return NULL;
 910    }
 911
 912    pdp->driPatch = 0;
 913    pdp->swapAvailable = (pdp->driMinor >= 2);
 914    pdp->invalidateAvailable = (pdp->driMinor >= 3);
 915
 916    pdp->base.destroyDisplay = dri2DestroyDisplay;
 917    pdp->base.createScreen = dri2CreateScreen;
 918
 919    i = 0;
 920    if (pdp->driMinor < 1)
 921       pdp->loader_extensions[i++] = &dri2LoaderExtension_old.base;
 922    else
 923       pdp->loader_extensions[i++] = &dri2LoaderExtension.base;
 924
 925    pdp->loader_extensions[i++] = &systemTimeExtension.base;
 926
 927 #ifdef __DRI_USE_INVALIDATE
 928    pdp->loader_extensions[i++] = &dri2UseInvalidate.base;
 929 #endif
 930    pdp->loader_extensions[i++] = NULL;
 931
 932    pdp->dri2Hash = __glxHashCreate();
 933    if (pdp->dri2Hash == NULL) {
 934       Xfree(pdp);
 935       return NULL;
 936    }
 937
 938    return &pdp->base;
 939 }
 940
 941 #endif /* GLX_DIRECT_RENDERING */