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