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/Xlib-xcb.h>
  38 #include <xcb/xcb.h>
  39 #include <xcb/dri2.h>
  40 #include "glapi.h"
  41 #include "glxclient.h"
  42 #include <X11/extensions/dri2proto.h>
  43 #include "xf86dri.h"
  44 #include <dlfcn.h>
  45 #include <fcntl.h>
  46 #include <unistd.h>
  47 #include <sys/types.h>
  48 #include <sys/mman.h>
  49 #include <sys/time.h>
  50 #include "xf86drm.h"
  51 #include "dri2.h"
  52 #include "dri_common.h"
  53
  54 /* From xmlpool/options.h, user exposed so should be stable */
  55 #define DRI_CONF_VBLANK_NEVER 0
  56 #define DRI_CONF_VBLANK_DEF_INTERVAL_0 1
  57 #define DRI_CONF_VBLANK_DEF_INTERVAL_1 2
  58 #define DRI_CONF_VBLANK_ALWAYS_SYNC 3
  59
  60 #undef DRI2_MINOR
  61 #define DRI2_MINOR 1
  62
  63 struct dri2_display
  64 {
  65    __GLXDRIdisplay base;
  66
  67    /*
  68     ** XFree86-DRI version information
  69     */
  70    int driMajor;
  71    int driMinor;
  72    int driPatch;
  73    int swapAvailable;
  74    int invalidateAvailable;
  75
  76    __glxHashTable *dri2Hash;
  77
  78    const __DRIextension *loader_extensions[4];
  79 };
  80
  81 struct dri2_screen {
  82    struct glx_screen base;
  83
  84    __DRIscreen *driScreen;
  85    __GLXDRIscreen vtable;
  86    const __DRIdri2Extension *dri2;
  87    const __DRIcoreExtension *core;
  88
  89    const __DRI2flushExtension *f;
  90    const __DRI2configQueryExtension *config;
  91    const __DRItexBufferExtension *texBuffer;
  92    const __DRI2throttleExtension *throttle;
  93    const __DRIconfig **driver_configs;
  94
  95    void *driver;
  96    int fd;
  97
  98    Bool show_fps;
  99 };
 100
 101 struct dri2_context
 102 {
 103    struct glx_context base;
 104    __DRIcontext *driContext;
 105 };
 106
 107 struct dri2_drawable
 108 {
 109    __GLXDRIdrawable base;
 110    __DRIdrawable *driDrawable;
 111    __DRIbuffer buffers[5];
 112    int bufferCount;
 113    int width, height;
 114    int have_back;
 115    int have_fake_front;
 116    int swap_interval;
 117
 118    uint64_t previous_time;
 119    unsigned frames;
 120 };
 121
 122 static const struct glx_context_vtable dri2_context_vtable;
 123
 124 /* For XCB's handling of ust/msc/sbc counters, we have to hand it the high and
 125  * low halves separately.  This helps you split them.
 126  */
 127 static void
 128 split_counter(uint64_t counter, uint32_t *hi, uint32_t *lo)
 129 {
 130    *hi = (counter >> 32);
 131    *lo = counter & 0xffffffff;
 132 }
 133
 134 static uint64_t
 135 merge_counter(uint32_t hi, uint32_t lo)
 136 {
 137    return ((uint64_t)hi << 32) | lo;
 138 }
 139
 140 static void
 141 dri2_destroy_context(struct glx_context *context)
 142 {
 143    struct dri2_context *pcp = (struct dri2_context *) context;
 144    struct dri2_screen *psc = (struct dri2_screen *) context->psc;
 145
 146    driReleaseDrawables(&pcp->base);
 147
 148    free((char *) context->extensions);
 149
 150    (*psc->core->destroyContext) (pcp->driContext);
 151
 152    free(pcp);
 153 }
 154
 155 static Bool
 156 dri2_bind_context(struct glx_context *context, struct glx_context *old,
 157                   GLXDrawable draw, GLXDrawable read)
 158 {
 159    struct dri2_context *pcp = (struct dri2_context *) context;
 160    struct dri2_screen *psc = (struct dri2_screen *) pcp->base.psc;
 161    struct dri2_drawable *pdraw, *pread;
 162    struct dri2_display *pdp;
 163
 164    pdraw = (struct dri2_drawable *) driFetchDrawable(context, draw);
 165    pread = (struct dri2_drawable *) driFetchDrawable(context, read);
 166
 167    driReleaseDrawables(&pcp->base);
 168
 169    if (pdraw == NULL || pread == NULL)
 170       return GLXBadDrawable;
 171
 172    if (!(*psc->core->bindContext) (pcp->driContext,
 173                                    pdraw->driDrawable, pread->driDrawable))
 174       return GLXBadContext;
 175
 176    /* If the server doesn't send invalidate events, we may miss a
 177     * resize before the rendering starts.  Invalidate the buffers now
 178     * so the driver will recheck before rendering starts. */
 179    pdp = (struct dri2_display *) psc->base.display;
 180    if (!pdp->invalidateAvailable) {
 181       dri2InvalidateBuffers(psc->base.dpy, pdraw->base.xDrawable);
 182       if (pread != pdraw)
 183          dri2InvalidateBuffers(psc->base.dpy, pread->base.xDrawable);
 184    }
 185
 186    return Success;
 187 }
 188
 189 static void
 190 dri2_unbind_context(struct glx_context *context, struct glx_context *new)
 191 {
 192    struct dri2_context *pcp = (struct dri2_context *) context;
 193    struct dri2_screen *psc = (struct dri2_screen *) pcp->base.psc;
 194
 195    (*psc->core->unbindContext) (pcp->driContext);
 196 }
 197
 198 static struct glx_context *
 199 dri2_create_context(struct glx_screen *base,
 200                     struct glx_config *config_base,
 201                     struct glx_context *shareList, int renderType)
 202 {
 203    struct dri2_context *pcp, *pcp_shared;
 204    struct dri2_screen *psc = (struct dri2_screen *) base;
 205    __GLXDRIconfigPrivate *config = (__GLXDRIconfigPrivate *) config_base;
 206    __DRIcontext *shared = NULL;
 207
 208    if (shareList) {
 209       /* If the shareList context is not a DRI2 context, we cannot possibly
 210        * create a DRI2 context that shares it.
 211        */
 212       if (shareList->vtable->destroy != dri2_destroy_context) {
 213          return NULL;
 214       }
 215
 216       pcp_shared = (struct dri2_context *) shareList;
 217       shared = pcp_shared->driContext;
 218    }
 219
 220    pcp = calloc(1, sizeof *pcp);
 221    if (pcp == NULL)
 222       return NULL;
 223
 224    if (!glx_context_init(&pcp->base, &psc->base, &config->base)) {
 225       free(pcp);
 226       return NULL;
 227    }
 228
 229    pcp->driContext =
 230       (*psc->dri2->createNewContext) (psc->driScreen,
 231                                       config->driConfig, shared, pcp);
 232
 233    if (pcp->driContext == NULL) {
 234       free(pcp);
 235       return NULL;
 236    }
 237
 238    pcp->base.vtable = &dri2_context_vtable;
 239
 240    return &pcp->base;
 241 }
 242
 243 static struct glx_context *
 244 dri2_create_context_attribs(struct glx_screen *base,
 245                             struct glx_config *config_base,
 246                             struct glx_context *shareList,
 247                             unsigned num_attribs,
 248                             const uint32_t *attribs,
 249                             unsigned *error)
 250 {
 251    struct dri2_context *pcp = NULL;
 252    struct dri2_context *pcp_shared = NULL;
 253    struct dri2_screen *psc = (struct dri2_screen *) base;
 254    __GLXDRIconfigPrivate *config = (__GLXDRIconfigPrivate *) config_base;
 255    __DRIcontext *shared = NULL;
 256
 257    uint32_t minor_ver = 1;
 258    uint32_t major_ver = 2;
 259    uint32_t flags = 0;
 260    unsigned api;
 261    int reset = __DRI_CTX_RESET_NO_NOTIFICATION;
 262    uint32_t ctx_attribs[2 * 5];
 263    unsigned num_ctx_attribs = 0;
 264
 265    if (psc->dri2->base.version < 3) {
 266       *error = __DRI_CTX_ERROR_NO_MEMORY;
 267       goto error_exit;
 268    }
 269
 270    /* Remap the GLX tokens to DRI2 tokens.
 271     */
 272    if (!dri2_convert_glx_attribs(num_attribs, attribs,
 273                                  &major_ver, &minor_ver, &flags, &api, &reset,
 274                                  error))
 275       goto error_exit;
 276
 277    if (shareList) {
 278       pcp_shared = (struct dri2_context *) shareList;
 279       shared = pcp_shared->driContext;
 280    }
 281
 282    pcp = calloc(1, sizeof *pcp);
 283    if (pcp == NULL) {
 284       *error = __DRI_CTX_ERROR_NO_MEMORY;
 285       goto error_exit;
 286    }
 287
 288    if (!glx_context_init(&pcp->base, &psc->base, &config->base))
 289       goto error_exit;
 290
 291    ctx_attribs[num_ctx_attribs++] = __DRI_CTX_ATTRIB_MAJOR_VERSION;
 292    ctx_attribs[num_ctx_attribs++] = major_ver;
 293    ctx_attribs[num_ctx_attribs++] = __DRI_CTX_ATTRIB_MINOR_VERSION;
 294    ctx_attribs[num_ctx_attribs++] = minor_ver;
 295
 296    /* Only send a value when the non-default value is requested.  By doing
 297     * this we don't have to check the driver's DRI2 version before sending the
 298     * default value.
 299     */
 300    if (reset != __DRI_CTX_RESET_NO_NOTIFICATION) {
 301       ctx_attribs[num_ctx_attribs++] = __DRI_CTX_ATTRIB_RESET_STRATEGY;
 302       ctx_attribs[num_ctx_attribs++] = reset;
 303    }
 304
 305    if (flags != 0) {
 306       ctx_attribs[num_ctx_attribs++] = __DRI_CTX_ATTRIB_FLAGS;
 307
 308       /* The current __DRI_CTX_FLAG_* values are identical to the
 309        * GLX_CONTEXT_*_BIT values.
 310        */
 311       ctx_attribs[num_ctx_attribs++] = flags;
 312    }
 313
 314    pcp->driContext =
 315       (*psc->dri2->createContextAttribs) (psc->driScreen,
 316                                           api,
 317                                           config->driConfig,
 318                                           shared,
 319                                           num_ctx_attribs / 2,
 320                                           ctx_attribs,
 321                                           error,
 322                                           pcp);
 323
 324    if (pcp->driContext == NULL)
 325       goto error_exit;
 326
 327    pcp->base.vtable = &dri2_context_vtable;
 328
 329    return &pcp->base;
 330
 331 error_exit:
 332    free(pcp);
 333
 334    return NULL;
 335 }
 336
 337 static void
 338 dri2DestroyDrawable(__GLXDRIdrawable *base)
 339 {
 340    struct dri2_screen *psc = (struct dri2_screen *) base->psc;
 341    struct dri2_drawable *pdraw = (struct dri2_drawable *) base;
 342    struct glx_display *dpyPriv = psc->base.display;
 343    struct dri2_display *pdp = (struct dri2_display *)dpyPriv->dri2Display;
 344
 345    __glxHashDelete(pdp->dri2Hash, pdraw->base.xDrawable);
 346    (*psc->core->destroyDrawable) (pdraw->driDrawable);
 347
 348    /* If it's a GLX 1.3 drawables, we can destroy the DRI2 drawable
 349     * now, as the application explicitly asked to destroy the GLX
 350     * drawable.  Otherwise, for legacy drawables, we let the DRI2
 351     * drawable linger on the server, since there's no good way of
 352     * knowing when the application is done with it.  The server will
 353     * destroy the DRI2 drawable when it destroys the X drawable or the
 354     * client exits anyway. */
 355    if (pdraw->base.xDrawable != pdraw->base.drawable)
 356       DRI2DestroyDrawable(psc->base.dpy, pdraw->base.xDrawable);
 357
 358    free(pdraw);
 359 }
 360
 361 static __GLXDRIdrawable *
 362 dri2CreateDrawable(struct glx_screen *base, XID xDrawable,
 363                    GLXDrawable drawable, struct glx_config *config_base)
 364 {
 365    struct dri2_drawable *pdraw;
 366    struct dri2_screen *psc = (struct dri2_screen *) base;
 367    __GLXDRIconfigPrivate *config = (__GLXDRIconfigPrivate *) config_base;
 368    struct glx_display *dpyPriv;
 369    struct dri2_display *pdp;
 370    GLint vblank_mode = DRI_CONF_VBLANK_DEF_INTERVAL_1;
 371
 372    pdraw = calloc(1, sizeof(*pdraw));
 373    if (!pdraw)
 374       return NULL;
 375
 376    pdraw->base.destroyDrawable = dri2DestroyDrawable;
 377    pdraw->base.xDrawable = xDrawable;
 378    pdraw->base.drawable = drawable;
 379    pdraw->base.psc = &psc->base;
 380    pdraw->bufferCount = 0;
 381    pdraw->swap_interval = 1; /* default may be overridden below */
 382    pdraw->have_back = 0;
 383
 384    if (psc->config)
 385       psc->config->configQueryi(psc->driScreen,
 386                                 "vblank_mode", &vblank_mode);
 387
 388    switch (vblank_mode) {
 389    case DRI_CONF_VBLANK_NEVER:
 390    case DRI_CONF_VBLANK_DEF_INTERVAL_0:
 391       pdraw->swap_interval = 0;
 392       break;
 393    case DRI_CONF_VBLANK_DEF_INTERVAL_1:
 394    case DRI_CONF_VBLANK_ALWAYS_SYNC:
 395    default:
 396       pdraw->swap_interval = 1;
 397       break;
 398    }
 399
 400    DRI2CreateDrawable(psc->base.dpy, xDrawable);
 401
 402    dpyPriv = __glXInitialize(psc->base.dpy);
 403    pdp = (struct dri2_display *)dpyPriv->dri2Display;;
 404    /* Create a new drawable */
 405    pdraw->driDrawable =
 406       (*psc->dri2->createNewDrawable) (psc->driScreen,
 407                                        config->driConfig, pdraw);
 408
 409    if (!pdraw->driDrawable) {
 410       DRI2DestroyDrawable(psc->base.dpy, xDrawable);
 411       free(pdraw);
 412       return NULL;
 413    }
 414
 415    if (__glxHashInsert(pdp->dri2Hash, xDrawable, pdraw)) {
 416       (*psc->core->destroyDrawable) (pdraw->driDrawable);
 417       DRI2DestroyDrawable(psc->base.dpy, xDrawable);
 418       free(pdraw);
 419       return None;
 420    }
 421
 422    /*
 423     * Make sure server has the same swap interval we do for the new
 424     * drawable.
 425     */
 426    if (psc->vtable.setSwapInterval)
 427       psc->vtable.setSwapInterval(&pdraw->base, pdraw->swap_interval);
 428
 429    return &pdraw->base;
 430 }
 431
 432 static int
 433 dri2DrawableGetMSC(struct glx_screen *psc, __GLXDRIdrawable *pdraw,
 434                    int64_t *ust, int64_t *msc, int64_t *sbc)
 435 {
 436    xcb_connection_t *c = XGetXCBConnection(pdraw->psc->dpy);
 437    xcb_dri2_get_msc_cookie_t get_msc_cookie;
 438    xcb_dri2_get_msc_reply_t *get_msc_reply;
 439
 440    get_msc_cookie = xcb_dri2_get_msc_unchecked(c, pdraw->xDrawable);
 441    get_msc_reply = xcb_dri2_get_msc_reply(c, get_msc_cookie, NULL);
 442
 443    if (!get_msc_reply)
 444       return 0;
 445
 446    *ust = merge_counter(get_msc_reply->ust_hi, get_msc_reply->ust_lo);
 447    *msc = merge_counter(get_msc_reply->msc_hi, get_msc_reply->msc_lo);
 448    *sbc = merge_counter(get_msc_reply->sbc_hi, get_msc_reply->sbc_lo);
 449    free(get_msc_reply);
 450
 451    return 1;
 452 }
 453
 454 static int
 455 dri2WaitForMSC(__GLXDRIdrawable *pdraw, int64_t target_msc, int64_t divisor,
 456                int64_t remainder, int64_t *ust, int64_t *msc, int64_t *sbc)
 457 {
 458    xcb_connection_t *c = XGetXCBConnection(pdraw->psc->dpy);
 459    xcb_dri2_wait_msc_cookie_t wait_msc_cookie;
 460    xcb_dri2_wait_msc_reply_t *wait_msc_reply;
 461    uint32_t target_msc_hi, target_msc_lo;
 462    uint32_t divisor_hi, divisor_lo;
 463    uint32_t remainder_hi, remainder_lo;
 464
 465    split_counter(target_msc, &target_msc_hi, &target_msc_lo);
 466    split_counter(divisor, &divisor_hi, &divisor_lo);
 467    split_counter(remainder, &remainder_hi, &remainder_lo);
 468
 469    wait_msc_cookie = xcb_dri2_wait_msc_unchecked(c, pdraw->xDrawable,
 470                                                  target_msc_hi, target_msc_lo,
 471                                                  divisor_hi, divisor_lo,
 472                                                  remainder_hi, remainder_lo);
 473    wait_msc_reply = xcb_dri2_wait_msc_reply(c, wait_msc_cookie, NULL);
 474
 475    if (!wait_msc_reply)
 476       return 0;
 477
 478    *ust = merge_counter(wait_msc_reply->ust_hi, wait_msc_reply->ust_lo);
 479    *msc = merge_counter(wait_msc_reply->msc_hi, wait_msc_reply->msc_lo);
 480    *sbc = merge_counter(wait_msc_reply->sbc_hi, wait_msc_reply->sbc_lo);
 481    free(wait_msc_reply);
 482
 483    return 1;
 484 }
 485
 486 static int
 487 dri2WaitForSBC(__GLXDRIdrawable *pdraw, int64_t target_sbc, int64_t *ust,
 488                int64_t *msc, int64_t *sbc)
 489 {
 490    xcb_connection_t *c = XGetXCBConnection(pdraw->psc->dpy);
 491    xcb_dri2_wait_sbc_cookie_t wait_sbc_cookie;
 492    xcb_dri2_wait_sbc_reply_t *wait_sbc_reply;
 493    uint32_t target_sbc_hi, target_sbc_lo;
 494
 495    split_counter(target_sbc, &target_sbc_hi, &target_sbc_lo);
 496
 497    wait_sbc_cookie = xcb_dri2_wait_sbc_unchecked(c, pdraw->xDrawable,
 498                                                  target_sbc_hi, target_sbc_lo);
 499    wait_sbc_reply = xcb_dri2_wait_sbc_reply(c, wait_sbc_cookie, NULL);
 500
 501    if (!wait_sbc_reply)
 502       return 0;
 503
 504    *ust = merge_counter(wait_sbc_reply->ust_hi, wait_sbc_reply->ust_lo);
 505    *msc = merge_counter(wait_sbc_reply->msc_hi, wait_sbc_reply->msc_lo);
 506    *sbc = merge_counter(wait_sbc_reply->sbc_hi, wait_sbc_reply->sbc_lo);
 507    free(wait_sbc_reply);
 508
 509    return 1;
 510 }
 511
 512 /**
 513  * dri2Throttle - Request driver throttling
 514  *
 515  * This function uses the DRI2 throttle extension to give the
 516  * driver the opportunity to throttle on flush front, copysubbuffer
 517  * and swapbuffers.
 518  */
 519 static void
 520 dri2Throttle(struct dri2_screen *psc,
 521              struct dri2_drawable *draw,
 522              enum __DRI2throttleReason reason)
 523 {
 524    if (psc->throttle) {
 525       struct glx_context *gc = __glXGetCurrentContext();
 526       struct dri2_context *dri2Ctx = (struct dri2_context *)gc;
 527       __DRIcontext *ctx =
 528          (dri2Ctx) ? dri2Ctx->driContext : NULL;
 529
 530       psc->throttle->throttle(ctx, draw->driDrawable, reason);
 531    }
 532 }
 533
 534 static void
 535 __dri2CopySubBuffer(__GLXDRIdrawable *pdraw, int x, int y,
 536                     int width, int height,
 537                     enum __DRI2throttleReason reason, Bool flush)
 538 {
 539    struct dri2_drawable *priv = (struct dri2_drawable *) pdraw;
 540    struct dri2_screen *psc = (struct dri2_screen *) pdraw->psc;
 541    XRectangle xrect;
 542    XserverRegion region;
 543
 544    /* Check we have the right attachments */
 545    if (!priv->have_back)
 546       return;
 547
 548    xrect.x = x;
 549    xrect.y = priv->height - y - height;
 550    xrect.width = width;
 551    xrect.height = height;
 552
 553    if (flush) {
 554       glFlush();
 555    }
 556
 557    if (psc->f)
 558       (*psc->f->flush) (priv->driDrawable);
 559
 560    dri2Throttle(psc, priv, reason);
 561
 562    region = XFixesCreateRegion(psc->base.dpy, &xrect, 1);
 563    DRI2CopyRegion(psc->base.dpy, pdraw->xDrawable, region,
 564                   DRI2BufferFrontLeft, DRI2BufferBackLeft);
 565
 566    /* Refresh the fake front (if present) after we just damaged the real
 567     * front.
 568     */
 569    if (priv->have_fake_front)
 570       DRI2CopyRegion(psc->base.dpy, pdraw->xDrawable, region,
 571                      DRI2BufferFakeFrontLeft, DRI2BufferFrontLeft);
 572
 573    XFixesDestroyRegion(psc->base.dpy, region);
 574 }
 575
 576 static void
 577 dri2CopySubBuffer(__GLXDRIdrawable *pdraw, int x, int y,
 578                   int width, int height, Bool flush)
 579 {
 580    __dri2CopySubBuffer(pdraw, x, y, width, height,
 581                        __DRI2_THROTTLE_COPYSUBBUFFER, flush);
 582 }
 583
 584
 585 static void
 586 dri2_copy_drawable(struct dri2_drawable *priv, int dest, int src)
 587 {
 588    XRectangle xrect;
 589    XserverRegion region;
 590    struct dri2_screen *psc = (struct dri2_screen *) priv->base.psc;
 591
 592    xrect.x = 0;
 593    xrect.y = 0;
 594    xrect.width = priv->width;
 595    xrect.height = priv->height;
 596
 597    if (psc->f)
 598       (*psc->f->flush) (priv->driDrawable);
 599
 600    region = XFixesCreateRegion(psc->base.dpy, &xrect, 1);
 601    DRI2CopyRegion(psc->base.dpy, priv->base.xDrawable, region, dest, src);
 602    XFixesDestroyRegion(psc->base.dpy, region);
 603
 604 }
 605
 606 static void
 607 dri2_wait_x(struct glx_context *gc)
 608 {
 609    struct dri2_drawable *priv = (struct dri2_drawable *)
 610       GetGLXDRIDrawable(gc->currentDpy, gc->currentDrawable);
 611
 612    if (priv == NULL || !priv->have_fake_front)
 613       return;
 614
 615    dri2_copy_drawable(priv, DRI2BufferFakeFrontLeft, DRI2BufferFrontLeft);
 616 }
 617
 618 static void
 619 dri2_wait_gl(struct glx_context *gc)
 620 {
 621    struct dri2_drawable *priv = (struct dri2_drawable *)
 622       GetGLXDRIDrawable(gc->currentDpy, gc->currentDrawable);
 623
 624    if (priv == NULL || !priv->have_fake_front)
 625       return;
 626
 627    dri2_copy_drawable(priv, DRI2BufferFrontLeft, DRI2BufferFakeFrontLeft);
 628 }
 629
 630 static void
 631 dri2FlushFrontBuffer(__DRIdrawable *driDrawable, void *loaderPrivate)
 632 {
 633    struct glx_display *priv;
 634    struct dri2_display *pdp;
 635    struct glx_context *gc;
 636    struct dri2_drawable *pdraw = loaderPrivate;
 637    struct dri2_screen *psc;
 638
 639    if (!pdraw)
 640       return;
 641
 642    if (!pdraw->base.psc)
 643       return;
 644
 645    psc = (struct dri2_screen *) pdraw->base.psc;
 646
 647    priv = __glXInitialize(psc->base.dpy);
 648    pdp = (struct dri2_display *) priv->dri2Display;
 649    gc = __glXGetCurrentContext();
 650
 651    dri2Throttle(psc, pdraw, __DRI2_THROTTLE_FLUSHFRONT);
 652
 653    /* Old servers don't send invalidate events */
 654    if (!pdp->invalidateAvailable)
 655        dri2InvalidateBuffers(priv->dpy, pdraw->base.xDrawable);
 656
 657    dri2_wait_gl(gc);
 658 }
 659
 660
 661 static void
 662 dri2DestroyScreen(struct glx_screen *base)
 663 {
 664    struct dri2_screen *psc = (struct dri2_screen *) base;
 665
 666    /* Free the direct rendering per screen data */
 667    (*psc->core->destroyScreen) (psc->driScreen);
 668    driDestroyConfigs(psc->driver_configs);
 669    close(psc->fd);
 670    free(psc);
 671 }
 672
 673 /**
 674  * Process list of buffer received from the server
 675  *
 676  * Processes the list of buffers received in a reply from the server to either
 677  * \c DRI2GetBuffers or \c DRI2GetBuffersWithFormat.
 678  */
 679 static void
 680 process_buffers(struct dri2_drawable * pdraw, DRI2Buffer * buffers,
 681                 unsigned count)
 682 {
 683    int i;
 684
 685    pdraw->bufferCount = count;
 686    pdraw->have_fake_front = 0;
 687    pdraw->have_back = 0;
 688
 689    /* This assumes the DRI2 buffer attachment tokens matches the
 690     * __DRIbuffer tokens. */
 691    for (i = 0; i < count; i++) {
 692       pdraw->buffers[i].attachment = buffers[i].attachment;
 693       pdraw->buffers[i].name = buffers[i].name;
 694       pdraw->buffers[i].pitch = buffers[i].pitch;
 695       pdraw->buffers[i].cpp = buffers[i].cpp;
 696       pdraw->buffers[i].flags = buffers[i].flags;
 697       if (pdraw->buffers[i].attachment == __DRI_BUFFER_FAKE_FRONT_LEFT)
 698          pdraw->have_fake_front = 1;
 699       if (pdraw->buffers[i].attachment == __DRI_BUFFER_BACK_LEFT)
 700          pdraw->have_back = 1;
 701    }
 702
 703 }
 704
 705 unsigned dri2GetSwapEventType(Display* dpy, XID drawable)
 706 {
 707       struct glx_display *glx_dpy = __glXInitialize(dpy);
 708       __GLXDRIdrawable *pdraw;
 709       pdraw = dri2GetGlxDrawableFromXDrawableId(dpy, drawable);
 710       if (!pdraw || !(pdraw->eventMask & GLX_BUFFER_SWAP_COMPLETE_INTEL_MASK))
 711          return 0;
 712       return glx_dpy->codes->first_event + GLX_BufferSwapComplete;
 713 }
 714
 715 static void show_fps(struct dri2_drawable *draw)
 716 {
 717    struct timeval tv;
 718    uint64_t current_time;
 719
 720    gettimeofday(&tv, 0);
 721    current_time = (uint64_t)tv.tv_sec*1000000 + (uint64_t)tv.tv_usec;
 722
 723    draw->frames++;
 724
 725    if (draw->previous_time + 1000000 <= current_time) {
 726       if (draw->previous_time) {
 727          fprintf(stderr, "libGL: FPS = %.1f\n",
 728                  ((uint64_t)draw->frames * 1000000) /
 729                  (double)(current_time - draw->previous_time));
 730       }
 731       draw->frames = 0;
 732       draw->previous_time = current_time;
 733    }
 734 }
 735
 736 static int64_t
 737 dri2SwapBuffers(__GLXDRIdrawable *pdraw, int64_t target_msc, int64_t divisor,
 738                 int64_t remainder, Bool flush)
 739 {
 740     struct dri2_drawable *priv = (struct dri2_drawable *) pdraw;
 741     struct glx_display *dpyPriv = __glXInitialize(priv->base.psc->dpy);
 742     struct dri2_screen *psc = (struct dri2_screen *) priv->base.psc;
 743     struct dri2_display *pdp =
 744         (struct dri2_display *)dpyPriv->dri2Display;
 745     CARD64 ret = 0;
 746
 747     /* Check we have the right attachments */
 748     if (!priv->have_back)
 749         return ret;
 750
 751     /* Old servers can't handle swapbuffers */
 752     if (!pdp->swapAvailable) {
 753        __dri2CopySubBuffer(pdraw, 0, 0, priv->width, priv->height,
 754                            __DRI2_THROTTLE_SWAPBUFFER, flush);
 755     } else {
 756        xcb_connection_t *c = XGetXCBConnection(pdraw->psc->dpy);
 757        xcb_dri2_swap_buffers_cookie_t swap_buffers_cookie;
 758        xcb_dri2_swap_buffers_reply_t *swap_buffers_reply;
 759        uint32_t target_msc_hi, target_msc_lo;
 760        uint32_t divisor_hi, divisor_lo;
 761        uint32_t remainder_hi, remainder_lo;
 762
 763        if (flush) {
 764           glFlush();
 765        }
 766
 767        if (psc->f) {
 768           struct glx_context *gc = __glXGetCurrentContext();
 769
 770           if (gc) {
 771              (*psc->f->flush)(priv->driDrawable);
 772           }
 773        }
 774
 775        dri2Throttle(psc, priv, __DRI2_THROTTLE_SWAPBUFFER);
 776
 777        split_counter(target_msc, &target_msc_hi, &target_msc_lo);
 778        split_counter(divisor, &divisor_hi, &divisor_lo);
 779        split_counter(remainder, &remainder_hi, &remainder_lo);
 780
 781        swap_buffers_cookie =
 782           xcb_dri2_swap_buffers_unchecked(c, pdraw->xDrawable,
 783                                           target_msc_hi, target_msc_lo,
 784                                           divisor_hi, divisor_lo,
 785                                           remainder_hi, remainder_lo);
 786        /* Immediately wait on the swapbuffers reply.  If we didn't, we'd have
 787         * to do so some time before reusing a (non-pageflipped) backbuffer.
 788         * Otherwise, the new rendering could get ahead of the X Server's
 789         * dispatch of the swapbuffer and you'd display garbage.
 790         *
 791         * We use XSync() first to reap the invalidate events through the event
 792         * filter, to ensure that the next drawing doesn't use an invalidated
 793         * buffer.
 794         */
 795        XSync(pdraw->psc->dpy, False);
 796        swap_buffers_reply =
 797           xcb_dri2_swap_buffers_reply(c, swap_buffers_cookie, NULL);
 798        ret = merge_counter(swap_buffers_reply->swap_hi,
 799                            swap_buffers_reply->swap_lo);
 800        free(swap_buffers_reply);
 801     }
 802
 803     if (psc->show_fps) {
 804        show_fps(priv);
 805     }
 806
 807     /* Old servers don't send invalidate events */
 808     if (!pdp->invalidateAvailable)
 809        dri2InvalidateBuffers(dpyPriv->dpy, pdraw->xDrawable);
 810
 811     return ret;
 812 }
 813
 814 static __DRIbuffer *
 815 dri2GetBuffers(__DRIdrawable * driDrawable,
 816                int *width, int *height,
 817                unsigned int *attachments, int count,
 818                int *out_count, void *loaderPrivate)
 819 {
 820    struct dri2_drawable *pdraw = loaderPrivate;
 821    DRI2Buffer *buffers;
 822
 823    buffers = DRI2GetBuffers(pdraw->base.psc->dpy, pdraw->base.xDrawable,
 824                             width, height, attachments, count, out_count);
 825    if (buffers == NULL)
 826       return NULL;
 827
 828    pdraw->width = *width;
 829    pdraw->height = *height;
 830    process_buffers(pdraw, buffers, *out_count);
 831
 832    free(buffers);
 833
 834    return pdraw->buffers;
 835 }
 836
 837 static __DRIbuffer *
 838 dri2GetBuffersWithFormat(__DRIdrawable * driDrawable,
 839                          int *width, int *height,
 840                          unsigned int *attachments, int count,
 841                          int *out_count, void *loaderPrivate)
 842 {
 843    struct dri2_drawable *pdraw = loaderPrivate;
 844    DRI2Buffer *buffers;
 845
 846    buffers = DRI2GetBuffersWithFormat(pdraw->base.psc->dpy,
 847                                       pdraw->base.xDrawable,
 848                                       width, height, attachments,
 849                                       count, out_count);
 850    if (buffers == NULL)
 851       return NULL;
 852
 853    pdraw->width = *width;
 854    pdraw->height = *height;
 855    process_buffers(pdraw, buffers, *out_count);
 856
 857    free(buffers);
 858
 859    return pdraw->buffers;
 860 }
 861
 862 static int
 863 dri2SetSwapInterval(__GLXDRIdrawable *pdraw, int interval)
 864 {
 865    xcb_connection_t *c = XGetXCBConnection(pdraw->psc->dpy);
 866    struct dri2_drawable *priv =  (struct dri2_drawable *) pdraw;
 867    GLint vblank_mode = DRI_CONF_VBLANK_DEF_INTERVAL_1;
 868    struct dri2_screen *psc = (struct dri2_screen *) priv->base.psc;
 869
 870    if (psc->config)
 871       psc->config->configQueryi(psc->driScreen,
 872                                 "vblank_mode", &vblank_mode);
 873
 874    switch (vblank_mode) {
 875    case DRI_CONF_VBLANK_NEVER:
 876       if (interval != 0)
 877          return GLX_BAD_VALUE;
 878       break;
 879    case DRI_CONF_VBLANK_ALWAYS_SYNC:
 880       if (interval <= 0)
 881          return GLX_BAD_VALUE;
 882       break;
 883    default:
 884       break;
 885    }
 886
 887    xcb_dri2_swap_interval(c, priv->base.xDrawable, interval);
 888    priv->swap_interval = interval;
 889
 890    return 0;
 891 }
 892
 893 static int
 894 dri2GetSwapInterval(__GLXDRIdrawable *pdraw)
 895 {
 896    struct dri2_drawable *priv =  (struct dri2_drawable *) pdraw;
 897
 898   return priv->swap_interval;
 899 }
 900
 901 static const __DRIdri2LoaderExtension dri2LoaderExtension = {
 902    {__DRI_DRI2_LOADER, __DRI_DRI2_LOADER_VERSION},
 903    dri2GetBuffers,
 904    dri2FlushFrontBuffer,
 905    dri2GetBuffersWithFormat,
 906 };
 907
 908 static const __DRIdri2LoaderExtension dri2LoaderExtension_old = {
 909    {__DRI_DRI2_LOADER, __DRI_DRI2_LOADER_VERSION},
 910    dri2GetBuffers,
 911    dri2FlushFrontBuffer,
 912    NULL,
 913 };
 914
 915 static const __DRIuseInvalidateExtension dri2UseInvalidate = {
 916    { __DRI_USE_INVALIDATE, __DRI_USE_INVALIDATE_VERSION }
 917 };
 918
 919 _X_HIDDEN void
 920 dri2InvalidateBuffers(Display *dpy, XID drawable)
 921 {
 922    __GLXDRIdrawable *pdraw =
 923       dri2GetGlxDrawableFromXDrawableId(dpy, drawable);
 924    struct dri2_screen *psc;
 925    struct dri2_drawable *pdp = (struct dri2_drawable *) pdraw;
 926
 927    if (!pdraw)
 928       return;
 929
 930    psc = (struct dri2_screen *) pdraw->psc;
 931
 932    if (pdraw && psc->f && psc->f->base.version >= 3 && psc->f->invalidate)
 933        psc->f->invalidate(pdp->driDrawable);
 934 }
 935
 936 static void
 937 dri2_bind_tex_image(Display * dpy,
 938                     GLXDrawable drawable,
 939                     int buffer, const int *attrib_list)
 940 {
 941    struct glx_context *gc = __glXGetCurrentContext();
 942    struct dri2_context *pcp = (struct dri2_context *) gc;
 943    __GLXDRIdrawable *base = GetGLXDRIDrawable(dpy, drawable);
 944    struct glx_display *dpyPriv = __glXInitialize(dpy);
 945    struct dri2_drawable *pdraw = (struct dri2_drawable *) base;
 946    struct dri2_display *pdp =
 947       (struct dri2_display *) dpyPriv->dri2Display;
 948    struct dri2_screen *psc;
 949
 950    if (pdraw != NULL) {
 951       psc = (struct dri2_screen *) base->psc;
 952
 953       if (!pdp->invalidateAvailable && psc->f &&
 954            psc->f->base.version >= 3 && psc->f->invalidate)
 955          psc->f->invalidate(pdraw->driDrawable);
 956
 957       if (psc->texBuffer->base.version >= 2 &&
 958           psc->texBuffer->setTexBuffer2 != NULL) {
 959          (*psc->texBuffer->setTexBuffer2) (pcp->driContext,
 960                                            pdraw->base.textureTarget,
 961                                            pdraw->base.textureFormat,
 962                                            pdraw->driDrawable);
 963       }
 964       else {
 965          (*psc->texBuffer->setTexBuffer) (pcp->driContext,
 966                                           pdraw->base.textureTarget,
 967                                           pdraw->driDrawable);
 968       }
 969    }
 970 }
 971
 972 static void
 973 dri2_release_tex_image(Display * dpy, GLXDrawable drawable, int buffer)
 974 {
 975 #if __DRI_TEX_BUFFER_VERSION >= 3
 976    struct glx_context *gc = __glXGetCurrentContext();
 977    struct dri2_context *pcp = (struct dri2_context *) gc;
 978    __GLXDRIdrawable *base = GetGLXDRIDrawable(dpy, drawable);
 979    struct glx_display *dpyPriv = __glXInitialize(dpy);
 980    struct dri2_drawable *pdraw = (struct dri2_drawable *) base;
 981    struct dri2_display *pdp =
 982       (struct dri2_display *) dpyPriv->dri2Display;
 983    struct dri2_screen *psc;
 984
 985    if (pdraw != NULL) {
 986       psc = (struct dri2_screen *) base->psc;
 987
 988       if (psc->texBuffer->base.version >= 3 &&
 989           psc->texBuffer->releaseTexBuffer != NULL) {
 990          (*psc->texBuffer->releaseTexBuffer) (pcp->driContext,
 991                                            pdraw->base.textureTarget,
 992                                            pdraw->driDrawable);
 993       }
 994    }
 995 #endif
 996 }
 997
 998 static const struct glx_context_vtable dri2_context_vtable = {
 999    dri2_destroy_context,
1000    dri2_bind_context,
1001    dri2_unbind_context,
1002    dri2_wait_gl,
1003    dri2_wait_x,
1004    DRI_glXUseXFont,
1005    dri2_bind_tex_image,
1006    dri2_release_tex_image,
1007    NULL, /* get_proc_address */
1008 };
1009
1010 static void
1011 dri2BindExtensions(struct dri2_screen *psc, const __DRIextension **extensions)
1012 {
1013    int i;
1014
1015    __glXEnableDirectExtension(&psc->base, "GLX_SGI_video_sync");
1016    __glXEnableDirectExtension(&psc->base, "GLX_SGI_swap_control");
1017    __glXEnableDirectExtension(&psc->base, "GLX_MESA_swap_control");
1018    __glXEnableDirectExtension(&psc->base, "GLX_SGI_make_current_read");
1019
1020    /* FIXME: if DRI2 version supports it... */
1021    __glXEnableDirectExtension(&psc->base, "GLX_INTEL_swap_event");
1022
1023    if (psc->dri2->base.version >= 3) {
1024       const unsigned mask = psc->dri2->getAPIMask(psc->driScreen);
1025
1026       __glXEnableDirectExtension(&psc->base, "GLX_ARB_create_context");
1027       __glXEnableDirectExtension(&psc->base, "GLX_ARB_create_context_profile");
1028
1029       if ((mask & (1 << __DRI_API_GLES2)) != 0)
1030          __glXEnableDirectExtension(&psc->base,
1031                                     "GLX_EXT_create_context_es2_profile");
1032    }
1033
1034    for (i = 0; extensions[i]; i++) {
1035       if ((strcmp(extensions[i]->name, __DRI_TEX_BUFFER) == 0)) {
1036          psc->texBuffer = (__DRItexBufferExtension *) extensions[i];
1037          __glXEnableDirectExtension(&psc->base, "GLX_EXT_texture_from_pixmap");
1038       }
1039
1040       if ((strcmp(extensions[i]->name, __DRI2_FLUSH) == 0)) {
1041          psc->f = (__DRI2flushExtension *) extensions[i];
1042          /* internal driver extension, no GL extension exposed */
1043       }
1044
1045       if ((strcmp(extensions[i]->name, __DRI2_CONFIG_QUERY) == 0))
1046          psc->config = (__DRI2configQueryExtension *) extensions[i];
1047
1048       if (((strcmp(extensions[i]->name, __DRI2_THROTTLE) == 0)))
1049          psc->throttle = (__DRI2throttleExtension *) extensions[i];
1050
1051       /* DRI2 version 3 is also required because
1052        * GLX_ARB_create_context_robustness requires GLX_ARB_create_context.
1053        */
1054       if (psc->dri2->base.version >= 3
1055           && strcmp(extensions[i]->name, __DRI2_ROBUSTNESS) == 0)
1056          __glXEnableDirectExtension(&psc->base,
1057                                     "GLX_ARB_create_context_robustness");
1058    }
1059 }
1060
1061 static const struct glx_screen_vtable dri2_screen_vtable = {
1062    dri2_create_context,
1063    dri2_create_context_attribs
1064 };
1065
1066 static struct glx_screen *
1067 dri2CreateScreen(int screen, struct glx_display * priv)
1068 {
1069    const __DRIconfig **driver_configs;
1070    const __DRIextension **extensions;
1071    const struct dri2_display *const pdp = (struct dri2_display *)
1072       priv->dri2Display;
1073    struct dri2_screen *psc;
1074    __GLXDRIscreen *psp;
1075    struct glx_config *configs = NULL, *visuals = NULL;
1076    char *driverName, *deviceName, *tmp;
1077    drm_magic_t magic;
1078    int i;
1079
1080    psc = calloc(1, sizeof *psc);
1081    if (psc == NULL)
1082       return NULL;
1083
1084    psc->fd = -1;
1085
1086    if (!glx_screen_init(&psc->base, screen, priv)) {
1087       free(psc);
1088       return NULL;
1089    }
1090
1091    if (!DRI2Connect(priv->dpy, RootWindow(priv->dpy, screen),
1092                     &driverName, &deviceName)) {
1093       glx_screen_cleanup(&psc->base);
1094       free(psc);
1095       InfoMessageF("screen %d does not appear to be DRI2 capable\n", screen);
1096       return NULL;
1097    }
1098
1099    psc->driver = driOpenDriver(driverName);
1100    if (psc->driver == NULL) {
1101       ErrorMessageF("driver pointer missing\n");
1102       goto handle_error;
1103    }
1104
1105    extensions = dlsym(psc->driver, __DRI_DRIVER_EXTENSIONS);
1106    if (extensions == NULL) {
1107       ErrorMessageF("driver exports no extensions (%s)\n", dlerror());
1108       goto handle_error;
1109    }
1110
1111    for (i = 0; extensions[i]; i++) {
1112       if (strcmp(extensions[i]->name, __DRI_CORE) == 0)
1113          psc->core = (__DRIcoreExtension *) extensions[i];
1114       if (strcmp(extensions[i]->name, __DRI_DRI2) == 0)
1115          psc->dri2 = (__DRIdri2Extension *) extensions[i];
1116    }
1117
1118    if (psc->core == NULL || psc->dri2 == NULL) {
1119       ErrorMessageF("core dri or dri2 extension not found\n");
1120       goto handle_error;
1121    }
1122
1123 #ifdef O_CLOEXEC
1124    psc->fd = open(deviceName, O_RDWR | O_CLOEXEC);
1125    if (psc->fd == -1 && errno == EINVAL)
1126 #endif
1127    {
1128       psc->fd = open(deviceName, O_RDWR);
1129       if (psc->fd != -1)
1130          fcntl(psc->fd, F_SETFD, fcntl(psc->fd, F_GETFD) | FD_CLOEXEC);
1131    }
1132    if (psc->fd < 0) {
1133       ErrorMessageF("failed to open drm device: %s\n", strerror(errno));
1134       goto handle_error;
1135    }
1136
1137    if (drmGetMagic(psc->fd, &magic)) {
1138       ErrorMessageF("failed to get magic\n");
1139       goto handle_error;
1140    }
1141
1142    if (!DRI2Authenticate(priv->dpy, RootWindow(priv->dpy, screen), magic)) {
1143       ErrorMessageF("failed to authenticate magic %d\n", magic);
1144       goto handle_error;
1145    }
1146
1147
1148    /* If the server does not support the protocol for
1149     * DRI2GetBuffersWithFormat, don't supply that interface to the driver.
1150     */
1151    psc->driScreen =
1152       psc->dri2->createNewScreen(screen, psc->fd,
1153                                  (const __DRIextension **)
1154                                  &pdp->loader_extensions[0],
1155                                  &driver_configs, psc);
1156
1157    if (psc->driScreen == NULL) {
1158       ErrorMessageF("failed to create dri screen\n");
1159       goto handle_error;
1160    }
1161
1162    extensions = psc->core->getExtensions(psc->driScreen);
1163    dri2BindExtensions(psc, extensions);
1164
1165    configs = driConvertConfigs(psc->core, psc->base.configs, driver_configs);
1166    visuals = driConvertConfigs(psc->core, psc->base.visuals, driver_configs);
1167
1168    if (!configs || !visuals)
1169        goto handle_error;
1170
1171    glx_config_destroy_list(psc->base.configs);
1172    psc->base.configs = configs;
1173    glx_config_destroy_list(psc->base.visuals);
1174    psc->base.visuals = visuals;
1175
1176    psc->driver_configs = driver_configs;
1177
1178    psc->base.vtable = &dri2_screen_vtable;
1179    psp = &psc->vtable;
1180    psc->base.driScreen = psp;
1181    psp->destroyScreen = dri2DestroyScreen;
1182    psp->createDrawable = dri2CreateDrawable;
1183    psp->swapBuffers = dri2SwapBuffers;
1184    psp->getDrawableMSC = NULL;
1185    psp->waitForMSC = NULL;
1186    psp->waitForSBC = NULL;
1187    psp->setSwapInterval = NULL;
1188    psp->getSwapInterval = NULL;
1189
1190    if (pdp->driMinor >= 2) {
1191       psp->getDrawableMSC = dri2DrawableGetMSC;
1192       psp->waitForMSC = dri2WaitForMSC;
1193       psp->waitForSBC = dri2WaitForSBC;
1194       psp->setSwapInterval = dri2SetSwapInterval;
1195       psp->getSwapInterval = dri2GetSwapInterval;
1196       __glXEnableDirectExtension(&psc->base, "GLX_OML_sync_control");
1197    }
1198
1199    /* DRI2 suports SubBuffer through DRI2CopyRegion, so it's always
1200     * available.*/
1201    psp->copySubBuffer = dri2CopySubBuffer;
1202    __glXEnableDirectExtension(&psc->base, "GLX_MESA_copy_sub_buffer");
1203
1204    free(driverName);
1205    free(deviceName);
1206
1207    tmp = getenv("LIBGL_SHOW_FPS");
1208    psc->show_fps = tmp && strcmp(tmp, "1") == 0;
1209
1210    return &psc->base;
1211
1212 handle_error:
1213    CriticalErrorMessageF("failed to load driver: %s\n", driverName);
1214
1215    if (configs)
1216        glx_config_destroy_list(configs);
1217    if (visuals)
1218        glx_config_destroy_list(visuals);
1219    if (psc->driScreen)
1220        psc->core->destroyScreen(psc->driScreen);
1221    psc->driScreen = NULL;
1222    if (psc->fd >= 0)
1223       close(psc->fd);
1224    if (psc->driver)
1225       dlclose(psc->driver);
1226
1227    free(driverName);
1228    free(deviceName);
1229    glx_screen_cleanup(&psc->base);
1230    free(psc);
1231
1232    return NULL;
1233 }
1234
1235 /* Called from __glXFreeDisplayPrivate.
1236  */
1237 static void
1238 dri2DestroyDisplay(__GLXDRIdisplay * dpy)
1239 {
1240    struct dri2_display *pdp = (struct dri2_display *) dpy;
1241
1242    __glxHashDestroy(pdp->dri2Hash);
1243    free(dpy);
1244 }
1245
1246 _X_HIDDEN __GLXDRIdrawable *
1247 dri2GetGlxDrawableFromXDrawableId(Display *dpy, XID id)
1248 {
1249    struct glx_display *d = __glXInitialize(dpy);
1250    struct dri2_display *pdp = (struct dri2_display *) d->dri2Display;
1251    __GLXDRIdrawable *pdraw;
1252
1253    if (__glxHashLookup(pdp->dri2Hash, id, (void *) &pdraw) == 0)
1254       return pdraw;
1255
1256    return NULL;
1257 }
1258
1259 /*
1260  * Allocate, initialize and return a __DRIdisplayPrivate object.
1261  * This is called from __glXInitialize() when we are given a new
1262  * display pointer.
1263  */
1264 _X_HIDDEN __GLXDRIdisplay *
1265 dri2CreateDisplay(Display * dpy)
1266 {
1267    struct dri2_display *pdp;
1268    int eventBase, errorBase, i;
1269
1270    if (!DRI2QueryExtension(dpy, &eventBase, &errorBase))
1271       return NULL;
1272
1273    pdp = malloc(sizeof *pdp);
1274    if (pdp == NULL)
1275       return NULL;
1276
1277    if (!DRI2QueryVersion(dpy, &pdp->driMajor, &pdp->driMinor)) {
1278       free(pdp);
1279       return NULL;
1280    }
1281
1282    pdp->driPatch = 0;
1283    pdp->swapAvailable = (pdp->driMinor >= 2);
1284    pdp->invalidateAvailable = (pdp->driMinor >= 3);
1285
1286    pdp->base.destroyDisplay = dri2DestroyDisplay;
1287    pdp->base.createScreen = dri2CreateScreen;
1288
1289    i = 0;
1290    if (pdp->driMinor < 1)
1291       pdp->loader_extensions[i++] = &dri2LoaderExtension_old.base;
1292    else
1293       pdp->loader_extensions[i++] = &dri2LoaderExtension.base;
1294
1295    pdp->loader_extensions[i++] = &systemTimeExtension.base;
1296
1297    pdp->loader_extensions[i++] = &dri2UseInvalidate.base;
1298
1299    pdp->loader_extensions[i++] = NULL;
1300
1301    pdp->dri2Hash = __glxHashCreate();
1302    if (pdp->dri2Hash == NULL) {
1303       free(pdp);
1304       return NULL;
1305    }
1306
1307    return &pdp->base;
1308 }
1309
1310 #endif /* GLX_DIRECT_RENDERING */