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 static __DRIcontext *
 513 dri2GetCurrentContext()
 514 {
 515    struct glx_context *gc = __glXGetCurrentContext();
 516    struct dri2_context *dri2Ctx = (struct dri2_context *)gc;
 517
 518    return dri2Ctx ? dri2Ctx->driContext : NULL;
 519 }
 520
 521 /**
 522  * dri2Throttle - Request driver throttling
 523  *
 524  * This function uses the DRI2 throttle extension to give the
 525  * driver the opportunity to throttle on flush front, copysubbuffer
 526  * and swapbuffers.
 527  */
 528 static void
 529 dri2Throttle(struct dri2_screen *psc,
 530              struct dri2_drawable *draw,
 531              enum __DRI2throttleReason reason)
 532 {
 533    if (psc->throttle) {
 534       __DRIcontext *ctx = dri2GetCurrentContext();
 535
 536       psc->throttle->throttle(ctx, draw->driDrawable, reason);
 537    }
 538 }
 539
 540 /**
 541  * Asks the driver to flush any queued work necessary for serializing with the
 542  * X command stream, and optionally the slightly more strict requirement of
 543  * glFlush() equivalence (which would require flushing even if nothing had
 544  * been drawn to a window system framebuffer, for example).
 545  */
 546 static void
 547 dri2Flush(struct dri2_screen *psc,
 548           __DRIcontext *ctx,
 549           struct dri2_drawable *draw,
 550           unsigned flags,
 551           enum __DRI2throttleReason throttle_reason)
 552 {
 553    if (ctx && psc->f && psc->f->base.version >= 4) {
 554       psc->f->flush_with_flags(ctx, draw->driDrawable, flags, throttle_reason);
 555    } else {
 556       if (flags & __DRI2_FLUSH_CONTEXT)
 557          glFlush();
 558
 559       if (psc->f)
 560          psc->f->flush(draw->driDrawable);
 561
 562       dri2Throttle(psc, draw, throttle_reason);
 563    }
 564 }
 565
 566 static void
 567 __dri2CopySubBuffer(__GLXDRIdrawable *pdraw, int x, int y,
 568                     int width, int height,
 569                     enum __DRI2throttleReason reason, Bool flush)
 570 {
 571    struct dri2_drawable *priv = (struct dri2_drawable *) pdraw;
 572    struct dri2_screen *psc = (struct dri2_screen *) pdraw->psc;
 573    XRectangle xrect;
 574    XserverRegion region;
 575    __DRIcontext *ctx = dri2GetCurrentContext();
 576    unsigned flags;
 577
 578    /* Check we have the right attachments */
 579    if (!priv->have_back)
 580       return;
 581
 582    xrect.x = x;
 583    xrect.y = priv->height - y - height;
 584    xrect.width = width;
 585    xrect.height = height;
 586
 587    flags = __DRI2_FLUSH_DRAWABLE;
 588    if (flush)
 589       flags |= __DRI2_FLUSH_CONTEXT;
 590    dri2Flush(psc, ctx, priv, flags, __DRI2_THROTTLE_SWAPBUFFER);
 591
 592    region = XFixesCreateRegion(psc->base.dpy, &xrect, 1);
 593    DRI2CopyRegion(psc->base.dpy, pdraw->xDrawable, region,
 594                   DRI2BufferFrontLeft, DRI2BufferBackLeft);
 595
 596    /* Refresh the fake front (if present) after we just damaged the real
 597     * front.
 598     */
 599    if (priv->have_fake_front)
 600       DRI2CopyRegion(psc->base.dpy, pdraw->xDrawable, region,
 601                      DRI2BufferFakeFrontLeft, DRI2BufferFrontLeft);
 602
 603    XFixesDestroyRegion(psc->base.dpy, region);
 604 }
 605
 606 static void
 607 dri2CopySubBuffer(__GLXDRIdrawable *pdraw, int x, int y,
 608                   int width, int height, Bool flush)
 609 {
 610    __dri2CopySubBuffer(pdraw, x, y, width, height,
 611                        __DRI2_THROTTLE_COPYSUBBUFFER, flush);
 612 }
 613
 614
 615 static void
 616 dri2_copy_drawable(struct dri2_drawable *priv, int dest, int src)
 617 {
 618    XRectangle xrect;
 619    XserverRegion region;
 620    struct dri2_screen *psc = (struct dri2_screen *) priv->base.psc;
 621
 622    xrect.x = 0;
 623    xrect.y = 0;
 624    xrect.width = priv->width;
 625    xrect.height = priv->height;
 626
 627    if (psc->f)
 628       (*psc->f->flush) (priv->driDrawable);
 629
 630    region = XFixesCreateRegion(psc->base.dpy, &xrect, 1);
 631    DRI2CopyRegion(psc->base.dpy, priv->base.xDrawable, region, dest, src);
 632    XFixesDestroyRegion(psc->base.dpy, region);
 633
 634 }
 635
 636 static void
 637 dri2_wait_x(struct glx_context *gc)
 638 {
 639    struct dri2_drawable *priv = (struct dri2_drawable *)
 640       GetGLXDRIDrawable(gc->currentDpy, gc->currentDrawable);
 641
 642    if (priv == NULL || !priv->have_fake_front)
 643       return;
 644
 645    dri2_copy_drawable(priv, DRI2BufferFakeFrontLeft, DRI2BufferFrontLeft);
 646 }
 647
 648 static void
 649 dri2_wait_gl(struct glx_context *gc)
 650 {
 651    struct dri2_drawable *priv = (struct dri2_drawable *)
 652       GetGLXDRIDrawable(gc->currentDpy, gc->currentDrawable);
 653
 654    if (priv == NULL || !priv->have_fake_front)
 655       return;
 656
 657    dri2_copy_drawable(priv, DRI2BufferFrontLeft, DRI2BufferFakeFrontLeft);
 658 }
 659
 660 /**
 661  * Called by the driver when it needs to update the real front buffer with the
 662  * contents of its fake front buffer.
 663  */
 664 static void
 665 dri2FlushFrontBuffer(__DRIdrawable *driDrawable, void *loaderPrivate)
 666 {
 667    struct glx_display *priv;
 668    struct dri2_display *pdp;
 669    struct glx_context *gc;
 670    struct dri2_drawable *pdraw = loaderPrivate;
 671    struct dri2_screen *psc;
 672
 673    if (!pdraw)
 674       return;
 675
 676    if (!pdraw->base.psc)
 677       return;
 678
 679    psc = (struct dri2_screen *) pdraw->base.psc;
 680
 681    priv = __glXInitialize(psc->base.dpy);
 682    pdp = (struct dri2_display *) priv->dri2Display;
 683    gc = __glXGetCurrentContext();
 684
 685    dri2Throttle(psc, pdraw, __DRI2_THROTTLE_FLUSHFRONT);
 686
 687    /* Old servers don't send invalidate events */
 688    if (!pdp->invalidateAvailable)
 689        dri2InvalidateBuffers(priv->dpy, pdraw->base.xDrawable);
 690
 691    dri2_wait_gl(gc);
 692 }
 693
 694
 695 static void
 696 dri2DestroyScreen(struct glx_screen *base)
 697 {
 698    struct dri2_screen *psc = (struct dri2_screen *) base;
 699
 700    /* Free the direct rendering per screen data */
 701    (*psc->core->destroyScreen) (psc->driScreen);
 702    driDestroyConfigs(psc->driver_configs);
 703    close(psc->fd);
 704    free(psc);
 705 }
 706
 707 /**
 708  * Process list of buffer received from the server
 709  *
 710  * Processes the list of buffers received in a reply from the server to either
 711  * \c DRI2GetBuffers or \c DRI2GetBuffersWithFormat.
 712  */
 713 static void
 714 process_buffers(struct dri2_drawable * pdraw, DRI2Buffer * buffers,
 715                 unsigned count)
 716 {
 717    int i;
 718
 719    pdraw->bufferCount = count;
 720    pdraw->have_fake_front = 0;
 721    pdraw->have_back = 0;
 722
 723    /* This assumes the DRI2 buffer attachment tokens matches the
 724     * __DRIbuffer tokens. */
 725    for (i = 0; i < count; i++) {
 726       pdraw->buffers[i].attachment = buffers[i].attachment;
 727       pdraw->buffers[i].name = buffers[i].name;
 728       pdraw->buffers[i].pitch = buffers[i].pitch;
 729       pdraw->buffers[i].cpp = buffers[i].cpp;
 730       pdraw->buffers[i].flags = buffers[i].flags;
 731       if (pdraw->buffers[i].attachment == __DRI_BUFFER_FAKE_FRONT_LEFT)
 732          pdraw->have_fake_front = 1;
 733       if (pdraw->buffers[i].attachment == __DRI_BUFFER_BACK_LEFT)
 734          pdraw->have_back = 1;
 735    }
 736
 737 }
 738
 739 unsigned dri2GetSwapEventType(Display* dpy, XID drawable)
 740 {
 741       struct glx_display *glx_dpy = __glXInitialize(dpy);
 742       __GLXDRIdrawable *pdraw;
 743       pdraw = dri2GetGlxDrawableFromXDrawableId(dpy, drawable);
 744       if (!pdraw || !(pdraw->eventMask & GLX_BUFFER_SWAP_COMPLETE_INTEL_MASK))
 745          return 0;
 746       return glx_dpy->codes->first_event + GLX_BufferSwapComplete;
 747 }
 748
 749 static void show_fps(struct dri2_drawable *draw)
 750 {
 751    struct timeval tv;
 752    uint64_t current_time;
 753
 754    gettimeofday(&tv, 0);
 755    current_time = (uint64_t)tv.tv_sec*1000000 + (uint64_t)tv.tv_usec;
 756
 757    draw->frames++;
 758
 759    if (draw->previous_time + 1000000 <= current_time) {
 760       if (draw->previous_time) {
 761          fprintf(stderr, "libGL: FPS = %.1f\n",
 762                  ((uint64_t)draw->frames * 1000000) /
 763                  (double)(current_time - draw->previous_time));
 764       }
 765       draw->frames = 0;
 766       draw->previous_time = current_time;
 767    }
 768 }
 769
 770 static int64_t
 771 dri2XcbSwapBuffers(Display *dpy,
 772                   __GLXDRIdrawable *pdraw,
 773                   int64_t target_msc,
 774                   int64_t divisor,
 775                   int64_t remainder)
 776 {
 777    xcb_dri2_swap_buffers_cookie_t swap_buffers_cookie;
 778    xcb_dri2_swap_buffers_reply_t *swap_buffers_reply;
 779    uint32_t target_msc_hi, target_msc_lo;
 780    uint32_t divisor_hi, divisor_lo;
 781    uint32_t remainder_hi, remainder_lo;
 782    int64_t ret = 0;
 783    xcb_connection_t *c = XGetXCBConnection(dpy);
 784
 785    split_counter(target_msc, &target_msc_hi, &target_msc_lo);
 786    split_counter(divisor, &divisor_hi, &divisor_lo);
 787    split_counter(remainder, &remainder_hi, &remainder_lo);
 788
 789    swap_buffers_cookie =
 790       xcb_dri2_swap_buffers_unchecked(c, pdraw->xDrawable,
 791                                       target_msc_hi, target_msc_lo,
 792                                       divisor_hi, divisor_lo,
 793                                       remainder_hi, remainder_lo);
 794
 795    /* Immediately wait on the swapbuffers reply.  If we didn't, we'd have
 796     * to do so some time before reusing a (non-pageflipped) backbuffer.
 797     * Otherwise, the new rendering could get ahead of the X Server's
 798     * dispatch of the swapbuffer and you'd display garbage.
 799     *
 800     * We use XSync() first to reap the invalidate events through the event
 801     * filter, to ensure that the next drawing doesn't use an invalidated
 802     * buffer.
 803     */
 804    XSync(dpy, False);
 805
 806    swap_buffers_reply =
 807       xcb_dri2_swap_buffers_reply(c, swap_buffers_cookie, NULL);
 808    if (swap_buffers_reply) {
 809       ret = merge_counter(swap_buffers_reply->swap_hi,
 810                           swap_buffers_reply->swap_lo);
 811       free(swap_buffers_reply);
 812    }
 813    return ret;
 814 }
 815
 816 static int64_t
 817 dri2SwapBuffers(__GLXDRIdrawable *pdraw, int64_t target_msc, int64_t divisor,
 818                 int64_t remainder, Bool flush)
 819 {
 820     struct dri2_drawable *priv = (struct dri2_drawable *) pdraw;
 821     struct glx_display *dpyPriv = __glXInitialize(priv->base.psc->dpy);
 822     struct dri2_screen *psc = (struct dri2_screen *) priv->base.psc;
 823     struct dri2_display *pdp =
 824         (struct dri2_display *)dpyPriv->dri2Display;
 825     int64_t ret = 0;
 826
 827     /* Check we have the right attachments */
 828     if (!priv->have_back)
 829         return ret;
 830
 831     /* Old servers can't handle swapbuffers */
 832     if (!pdp->swapAvailable) {
 833        __dri2CopySubBuffer(pdraw, 0, 0, priv->width, priv->height,
 834                            __DRI2_THROTTLE_SWAPBUFFER, flush);
 835     } else {
 836        __DRIcontext *ctx = dri2GetCurrentContext();
 837        unsigned flags = __DRI2_FLUSH_DRAWABLE;
 838        if (flush)
 839           flags |= __DRI2_FLUSH_CONTEXT;
 840        dri2Flush(psc, ctx, priv, flags, __DRI2_THROTTLE_SWAPBUFFER);
 841
 842        ret = dri2XcbSwapBuffers(pdraw->psc->dpy, pdraw,
 843                                 target_msc, divisor, remainder);
 844     }
 845
 846     if (psc->show_fps) {
 847        show_fps(priv);
 848     }
 849
 850     /* Old servers don't send invalidate events */
 851     if (!pdp->invalidateAvailable)
 852        dri2InvalidateBuffers(dpyPriv->dpy, pdraw->xDrawable);
 853
 854     return ret;
 855 }
 856
 857 static __DRIbuffer *
 858 dri2GetBuffers(__DRIdrawable * driDrawable,
 859                int *width, int *height,
 860                unsigned int *attachments, int count,
 861                int *out_count, void *loaderPrivate)
 862 {
 863    struct dri2_drawable *pdraw = loaderPrivate;
 864    DRI2Buffer *buffers;
 865
 866    buffers = DRI2GetBuffers(pdraw->base.psc->dpy, pdraw->base.xDrawable,
 867                             width, height, attachments, count, out_count);
 868    if (buffers == NULL)
 869       return NULL;
 870
 871    pdraw->width = *width;
 872    pdraw->height = *height;
 873    process_buffers(pdraw, buffers, *out_count);
 874
 875    free(buffers);
 876
 877    return pdraw->buffers;
 878 }
 879
 880 static __DRIbuffer *
 881 dri2GetBuffersWithFormat(__DRIdrawable * driDrawable,
 882                          int *width, int *height,
 883                          unsigned int *attachments, int count,
 884                          int *out_count, void *loaderPrivate)
 885 {
 886    struct dri2_drawable *pdraw = loaderPrivate;
 887    DRI2Buffer *buffers;
 888
 889    buffers = DRI2GetBuffersWithFormat(pdraw->base.psc->dpy,
 890                                       pdraw->base.xDrawable,
 891                                       width, height, attachments,
 892                                       count, out_count);
 893    if (buffers == NULL)
 894       return NULL;
 895
 896    pdraw->width = *width;
 897    pdraw->height = *height;
 898    process_buffers(pdraw, buffers, *out_count);
 899
 900    free(buffers);
 901
 902    return pdraw->buffers;
 903 }
 904
 905 static int
 906 dri2SetSwapInterval(__GLXDRIdrawable *pdraw, int interval)
 907 {
 908    xcb_connection_t *c = XGetXCBConnection(pdraw->psc->dpy);
 909    struct dri2_drawable *priv =  (struct dri2_drawable *) pdraw;
 910    GLint vblank_mode = DRI_CONF_VBLANK_DEF_INTERVAL_1;
 911    struct dri2_screen *psc = (struct dri2_screen *) priv->base.psc;
 912
 913    if (psc->config)
 914       psc->config->configQueryi(psc->driScreen,
 915                                 "vblank_mode", &vblank_mode);
 916
 917    switch (vblank_mode) {
 918    case DRI_CONF_VBLANK_NEVER:
 919       if (interval != 0)
 920          return GLX_BAD_VALUE;
 921       break;
 922    case DRI_CONF_VBLANK_ALWAYS_SYNC:
 923       if (interval <= 0)
 924          return GLX_BAD_VALUE;
 925       break;
 926    default:
 927       break;
 928    }
 929
 930    xcb_dri2_swap_interval(c, priv->base.xDrawable, interval);
 931    priv->swap_interval = interval;
 932
 933    return 0;
 934 }
 935
 936 static int
 937 dri2GetSwapInterval(__GLXDRIdrawable *pdraw)
 938 {
 939    struct dri2_drawable *priv =  (struct dri2_drawable *) pdraw;
 940
 941   return priv->swap_interval;
 942 }
 943
 944 static const __DRIdri2LoaderExtension dri2LoaderExtension = {
 945    {__DRI_DRI2_LOADER, __DRI_DRI2_LOADER_VERSION},
 946    dri2GetBuffers,
 947    dri2FlushFrontBuffer,
 948    dri2GetBuffersWithFormat,
 949 };
 950
 951 static const __DRIdri2LoaderExtension dri2LoaderExtension_old = {
 952    {__DRI_DRI2_LOADER, __DRI_DRI2_LOADER_VERSION},
 953    dri2GetBuffers,
 954    dri2FlushFrontBuffer,
 955    NULL,
 956 };
 957
 958 static const __DRIuseInvalidateExtension dri2UseInvalidate = {
 959    { __DRI_USE_INVALIDATE, __DRI_USE_INVALIDATE_VERSION }
 960 };
 961
 962 _X_HIDDEN void
 963 dri2InvalidateBuffers(Display *dpy, XID drawable)
 964 {
 965    __GLXDRIdrawable *pdraw =
 966       dri2GetGlxDrawableFromXDrawableId(dpy, drawable);
 967    struct dri2_screen *psc;
 968    struct dri2_drawable *pdp = (struct dri2_drawable *) pdraw;
 969
 970    if (!pdraw)
 971       return;
 972
 973    psc = (struct dri2_screen *) pdraw->psc;
 974
 975    if (pdraw && psc->f && psc->f->base.version >= 3 && psc->f->invalidate)
 976        psc->f->invalidate(pdp->driDrawable);
 977 }
 978
 979 static void
 980 dri2_bind_tex_image(Display * dpy,
 981                     GLXDrawable drawable,
 982                     int buffer, const int *attrib_list)
 983 {
 984    struct glx_context *gc = __glXGetCurrentContext();
 985    struct dri2_context *pcp = (struct dri2_context *) gc;
 986    __GLXDRIdrawable *base = GetGLXDRIDrawable(dpy, drawable);
 987    struct glx_display *dpyPriv = __glXInitialize(dpy);
 988    struct dri2_drawable *pdraw = (struct dri2_drawable *) base;
 989    struct dri2_display *pdp =
 990       (struct dri2_display *) dpyPriv->dri2Display;
 991    struct dri2_screen *psc;
 992
 993    if (pdraw != NULL) {
 994       psc = (struct dri2_screen *) base->psc;
 995
 996       if (!pdp->invalidateAvailable && psc->f &&
 997            psc->f->base.version >= 3 && psc->f->invalidate)
 998          psc->f->invalidate(pdraw->driDrawable);
 999
1000       if (psc->texBuffer->base.version >= 2 &&
1001           psc->texBuffer->setTexBuffer2 != NULL) {
1002          (*psc->texBuffer->setTexBuffer2) (pcp->driContext,
1003                                            pdraw->base.textureTarget,
1004                                            pdraw->base.textureFormat,
1005                                            pdraw->driDrawable);
1006       }
1007       else {
1008          (*psc->texBuffer->setTexBuffer) (pcp->driContext,
1009                                           pdraw->base.textureTarget,
1010                                           pdraw->driDrawable);
1011       }
1012    }
1013 }
1014
1015 static void
1016 dri2_release_tex_image(Display * dpy, GLXDrawable drawable, int buffer)
1017 {
1018 #if __DRI_TEX_BUFFER_VERSION >= 3
1019    struct glx_context *gc = __glXGetCurrentContext();
1020    struct dri2_context *pcp = (struct dri2_context *) gc;
1021    __GLXDRIdrawable *base = GetGLXDRIDrawable(dpy, drawable);
1022    struct glx_display *dpyPriv = __glXInitialize(dpy);
1023    struct dri2_drawable *pdraw = (struct dri2_drawable *) base;
1024    struct dri2_display *pdp =
1025       (struct dri2_display *) dpyPriv->dri2Display;
1026    struct dri2_screen *psc;
1027
1028    if (pdraw != NULL) {
1029       psc = (struct dri2_screen *) base->psc;
1030
1031       if (psc->texBuffer->base.version >= 3 &&
1032           psc->texBuffer->releaseTexBuffer != NULL) {
1033          (*psc->texBuffer->releaseTexBuffer) (pcp->driContext,
1034                                            pdraw->base.textureTarget,
1035                                            pdraw->driDrawable);
1036       }
1037    }
1038 #endif
1039 }
1040
1041 static const struct glx_context_vtable dri2_context_vtable = {
1042    dri2_destroy_context,
1043    dri2_bind_context,
1044    dri2_unbind_context,
1045    dri2_wait_gl,
1046    dri2_wait_x,
1047    DRI_glXUseXFont,
1048    dri2_bind_tex_image,
1049    dri2_release_tex_image,
1050    NULL, /* get_proc_address */
1051 };
1052
1053 static void
1054 dri2BindExtensions(struct dri2_screen *psc, struct glx_display * priv,
1055                    const char *driverName)
1056 {
1057    const struct dri2_display *const pdp = (struct dri2_display *)
1058       priv->dri2Display;
1059    const __DRIextension **extensions;
1060    int i;
1061
1062    extensions = psc->core->getExtensions(psc->driScreen);
1063
1064    __glXEnableDirectExtension(&psc->base, "GLX_SGI_video_sync");
1065    __glXEnableDirectExtension(&psc->base, "GLX_SGI_swap_control");
1066    __glXEnableDirectExtension(&psc->base, "GLX_MESA_swap_control");
1067    __glXEnableDirectExtension(&psc->base, "GLX_SGI_make_current_read");
1068
1069    /*
1070     * GLX_INTEL_swap_event is broken on the server side, where it's
1071     * currently unconditionally enabled. This completely breaks
1072     * systems running on drivers which don't support that extension.
1073     * There's no way to test for its presence on this side, so instead
1074     * of disabling it unconditionally, just disable it for drivers
1075     * which are known to not support it, or for DDX drivers supporting
1076     * only an older (pre-ScheduleSwap) version of DRI2.
1077     *
1078     * This is a hack which is required until:
1079     * http://lists.x.org/archives/xorg-devel/2013-February/035449.html
1080     * is merged and updated xserver makes it's way into distros:
1081     */
1082    if (pdp->swapAvailable && strcmp(driverName, "vmwgfx") != 0) {
1083       __glXEnableDirectExtension(&psc->base, "GLX_INTEL_swap_event");
1084    }
1085
1086    if (psc->dri2->base.version >= 3) {
1087       const unsigned mask = psc->dri2->getAPIMask(psc->driScreen);
1088
1089       __glXEnableDirectExtension(&psc->base, "GLX_ARB_create_context");
1090       __glXEnableDirectExtension(&psc->base, "GLX_ARB_create_context_profile");
1091
1092       if ((mask & (1 << __DRI_API_GLES2)) != 0)
1093          __glXEnableDirectExtension(&psc->base,
1094                                     "GLX_EXT_create_context_es2_profile");
1095    }
1096
1097    for (i = 0; extensions[i]; i++) {
1098       if ((strcmp(extensions[i]->name, __DRI_TEX_BUFFER) == 0)) {
1099          psc->texBuffer = (__DRItexBufferExtension *) extensions[i];
1100          __glXEnableDirectExtension(&psc->base, "GLX_EXT_texture_from_pixmap");
1101       }
1102
1103       if ((strcmp(extensions[i]->name, __DRI2_FLUSH) == 0)) {
1104          psc->f = (__DRI2flushExtension *) extensions[i];
1105          /* internal driver extension, no GL extension exposed */
1106       }
1107
1108       if ((strcmp(extensions[i]->name, __DRI2_CONFIG_QUERY) == 0))
1109          psc->config = (__DRI2configQueryExtension *) extensions[i];
1110
1111       if (((strcmp(extensions[i]->name, __DRI2_THROTTLE) == 0)))
1112          psc->throttle = (__DRI2throttleExtension *) extensions[i];
1113
1114       /* DRI2 version 3 is also required because
1115        * GLX_ARB_create_context_robustness requires GLX_ARB_create_context.
1116        */
1117       if (psc->dri2->base.version >= 3
1118           && strcmp(extensions[i]->name, __DRI2_ROBUSTNESS) == 0)
1119          __glXEnableDirectExtension(&psc->base,
1120                                     "GLX_ARB_create_context_robustness");
1121    }
1122 }
1123
1124 static const struct glx_screen_vtable dri2_screen_vtable = {
1125    dri2_create_context,
1126    dri2_create_context_attribs
1127 };
1128
1129 static struct glx_screen *
1130 dri2CreateScreen(int screen, struct glx_display * priv)
1131 {
1132    const __DRIconfig **driver_configs;
1133    const __DRIextension **extensions;
1134    const struct dri2_display *const pdp = (struct dri2_display *)
1135       priv->dri2Display;
1136    struct dri2_screen *psc;
1137    __GLXDRIscreen *psp;
1138    struct glx_config *configs = NULL, *visuals = NULL;
1139    char *driverName, *deviceName, *tmp;
1140    drm_magic_t magic;
1141    int i;
1142
1143    psc = calloc(1, sizeof *psc);
1144    if (psc == NULL)
1145       return NULL;
1146
1147    psc->fd = -1;
1148
1149    if (!glx_screen_init(&psc->base, screen, priv)) {
1150       free(psc);
1151       return NULL;
1152    }
1153
1154    if (!DRI2Connect(priv->dpy, RootWindow(priv->dpy, screen),
1155                     &driverName, &deviceName)) {
1156       glx_screen_cleanup(&psc->base);
1157       free(psc);
1158       InfoMessageF("screen %d does not appear to be DRI2 capable\n", screen);
1159       return NULL;
1160    }
1161
1162    psc->driver = driOpenDriver(driverName);
1163    if (psc->driver == NULL) {
1164       ErrorMessageF("driver pointer missing\n");
1165       goto handle_error;
1166    }
1167
1168    extensions = dlsym(psc->driver, __DRI_DRIVER_EXTENSIONS);
1169    if (extensions == NULL) {
1170       ErrorMessageF("driver exports no extensions (%s)\n", dlerror());
1171       goto handle_error;
1172    }
1173
1174    for (i = 0; extensions[i]; i++) {
1175       if (strcmp(extensions[i]->name, __DRI_CORE) == 0)
1176          psc->core = (__DRIcoreExtension *) extensions[i];
1177       if (strcmp(extensions[i]->name, __DRI_DRI2) == 0)
1178          psc->dri2 = (__DRIdri2Extension *) extensions[i];
1179    }
1180
1181    if (psc->core == NULL || psc->dri2 == NULL) {
1182       ErrorMessageF("core dri or dri2 extension not found\n");
1183       goto handle_error;
1184    }
1185
1186 #ifdef O_CLOEXEC
1187    psc->fd = open(deviceName, O_RDWR | O_CLOEXEC);
1188    if (psc->fd == -1 && errno == EINVAL)
1189 #endif
1190    {
1191       psc->fd = open(deviceName, O_RDWR);
1192       if (psc->fd != -1)
1193          fcntl(psc->fd, F_SETFD, fcntl(psc->fd, F_GETFD) | FD_CLOEXEC);
1194    }
1195    if (psc->fd < 0) {
1196       ErrorMessageF("failed to open drm device: %s\n", strerror(errno));
1197       goto handle_error;
1198    }
1199
1200    if (drmGetMagic(psc->fd, &magic)) {
1201       ErrorMessageF("failed to get magic\n");
1202       goto handle_error;
1203    }
1204
1205    if (!DRI2Authenticate(priv->dpy, RootWindow(priv->dpy, screen), magic)) {
1206       ErrorMessageF("failed to authenticate magic %d\n", magic);
1207       goto handle_error;
1208    }
1209
1210
1211    /* If the server does not support the protocol for
1212     * DRI2GetBuffersWithFormat, don't supply that interface to the driver.
1213     */
1214    psc->driScreen =
1215       psc->dri2->createNewScreen(screen, psc->fd,
1216                                  (const __DRIextension **)
1217                                  &pdp->loader_extensions[0],
1218                                  &driver_configs, psc);
1219
1220    if (psc->driScreen == NULL) {
1221       ErrorMessageF("failed to create dri screen\n");
1222       goto handle_error;
1223    }
1224
1225    dri2BindExtensions(psc, priv, driverName);
1226
1227    configs = driConvertConfigs(psc->core, psc->base.configs, driver_configs);
1228    visuals = driConvertConfigs(psc->core, psc->base.visuals, driver_configs);
1229
1230    if (!configs || !visuals)
1231        goto handle_error;
1232
1233    glx_config_destroy_list(psc->base.configs);
1234    psc->base.configs = configs;
1235    glx_config_destroy_list(psc->base.visuals);
1236    psc->base.visuals = visuals;
1237
1238    psc->driver_configs = driver_configs;
1239
1240    psc->base.vtable = &dri2_screen_vtable;
1241    psp = &psc->vtable;
1242    psc->base.driScreen = psp;
1243    psp->destroyScreen = dri2DestroyScreen;
1244    psp->createDrawable = dri2CreateDrawable;
1245    psp->swapBuffers = dri2SwapBuffers;
1246    psp->getDrawableMSC = NULL;
1247    psp->waitForMSC = NULL;
1248    psp->waitForSBC = NULL;
1249    psp->setSwapInterval = NULL;
1250    psp->getSwapInterval = NULL;
1251
1252    if (pdp->driMinor >= 2) {
1253       psp->getDrawableMSC = dri2DrawableGetMSC;
1254       psp->waitForMSC = dri2WaitForMSC;
1255       psp->waitForSBC = dri2WaitForSBC;
1256       psp->setSwapInterval = dri2SetSwapInterval;
1257       psp->getSwapInterval = dri2GetSwapInterval;
1258       __glXEnableDirectExtension(&psc->base, "GLX_OML_sync_control");
1259    }
1260
1261    /* DRI2 suports SubBuffer through DRI2CopyRegion, so it's always
1262     * available.*/
1263    psp->copySubBuffer = dri2CopySubBuffer;
1264    __glXEnableDirectExtension(&psc->base, "GLX_MESA_copy_sub_buffer");
1265
1266    free(driverName);
1267    free(deviceName);
1268
1269    tmp = getenv("LIBGL_SHOW_FPS");
1270    psc->show_fps = tmp && strcmp(tmp, "1") == 0;
1271
1272    return &psc->base;
1273
1274 handle_error:
1275    CriticalErrorMessageF("failed to load driver: %s\n", driverName);
1276
1277    if (configs)
1278        glx_config_destroy_list(configs);
1279    if (visuals)
1280        glx_config_destroy_list(visuals);
1281    if (psc->driScreen)
1282        psc->core->destroyScreen(psc->driScreen);
1283    psc->driScreen = NULL;
1284    if (psc->fd >= 0)
1285       close(psc->fd);
1286    if (psc->driver)
1287       dlclose(psc->driver);
1288
1289    free(driverName);
1290    free(deviceName);
1291    glx_screen_cleanup(&psc->base);
1292    free(psc);
1293
1294    return NULL;
1295 }
1296
1297 /* Called from __glXFreeDisplayPrivate.
1298  */
1299 static void
1300 dri2DestroyDisplay(__GLXDRIdisplay * dpy)
1301 {
1302    struct dri2_display *pdp = (struct dri2_display *) dpy;
1303
1304    __glxHashDestroy(pdp->dri2Hash);
1305    free(dpy);
1306 }
1307
1308 _X_HIDDEN __GLXDRIdrawable *
1309 dri2GetGlxDrawableFromXDrawableId(Display *dpy, XID id)
1310 {
1311    struct glx_display *d = __glXInitialize(dpy);
1312    struct dri2_display *pdp = (struct dri2_display *) d->dri2Display;
1313    __GLXDRIdrawable *pdraw;
1314
1315    if (__glxHashLookup(pdp->dri2Hash, id, (void *) &pdraw) == 0)
1316       return pdraw;
1317
1318    return NULL;
1319 }
1320
1321 /*
1322  * Allocate, initialize and return a __DRIdisplayPrivate object.
1323  * This is called from __glXInitialize() when we are given a new
1324  * display pointer.
1325  */
1326 _X_HIDDEN __GLXDRIdisplay *
1327 dri2CreateDisplay(Display * dpy)
1328 {
1329    struct dri2_display *pdp;
1330    int eventBase, errorBase, i;
1331
1332    if (!DRI2QueryExtension(dpy, &eventBase, &errorBase))
1333       return NULL;
1334
1335    pdp = malloc(sizeof *pdp);
1336    if (pdp == NULL)
1337       return NULL;
1338
1339    if (!DRI2QueryVersion(dpy, &pdp->driMajor, &pdp->driMinor)) {
1340       free(pdp);
1341       return NULL;
1342    }
1343
1344    pdp->driPatch = 0;
1345    pdp->swapAvailable = (pdp->driMinor >= 2);
1346    pdp->invalidateAvailable = (pdp->driMinor >= 3);
1347
1348    pdp->base.destroyDisplay = dri2DestroyDisplay;
1349    pdp->base.createScreen = dri2CreateScreen;
1350
1351    i = 0;
1352    if (pdp->driMinor < 1)
1353       pdp->loader_extensions[i++] = &dri2LoaderExtension_old.base;
1354    else
1355       pdp->loader_extensions[i++] = &dri2LoaderExtension.base;
1356
1357    pdp->loader_extensions[i++] = &systemTimeExtension.base;
1358
1359    pdp->loader_extensions[i++] = &dri2UseInvalidate.base;
1360
1361    pdp->loader_extensions[i++] = NULL;
1362
1363    pdp->dri2Hash = __glxHashCreate();
1364    if (pdp->dri2Hash == NULL) {
1365       free(pdp);
1366       return NULL;
1367    }
1368
1369    return &pdp->base;
1370 }
1371
1372 #endif /* GLX_DIRECT_RENDERING */