src/glx/dri3_glx.c

   1 /*
   2  * Copyright © 2013 Keith Packard
   3  *
   4  * Permission to use, copy, modify, distribute, and sell this software and its
   5  * documentation for any purpose is hereby granted without fee, provided that
   6  * the above copyright notice appear in all copies and that both that copyright
   7  * notice and this permission notice appear in supporting documentation, and
   8  * that the name of the copyright holders not be used in advertising or
   9  * publicity pertaining to distribution of the software without specific,
  10  * written prior permission.  The copyright holders make no representations
  11  * about the suitability of this software for any purpose.  It is provided "as
  12  * is" without express or implied warranty.
  13  *
  14  * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
  15  * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
  16  * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
  17  * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
  18  * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
  19  * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
  20  * OF THIS SOFTWARE.
  21  */
  22
  23 /*
  24  * Portions of this code were adapted from dri2_glx.c which carries the
  25  * following copyright:
  26  *
  27  * Copyright © 2008 Red Hat, Inc.
  28  *
  29  * Permission is hereby granted, free of charge, to any person obtaining a
  30  * copy of this software and associated documentation files (the "Soft-
  31  * ware"), to deal in the Software without restriction, including without
  32  * limitation the rights to use, copy, modify, merge, publish, distribute,
  33  * and/or sell copies of the Software, and to permit persons to whom the
  34  * Software is furnished to do so, provided that the above copyright
  35  * notice(s) and this permission notice appear in all copies of the Soft-
  36  * ware and that both the above copyright notice(s) and this permission
  37  * notice appear in supporting documentation.
  38  *
  39  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  40  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABIL-
  41  * ITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY
  42  * RIGHTS. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR HOLDERS INCLUDED IN
  43  * THIS NOTICE BE LIABLE FOR ANY CLAIM, OR ANY SPECIAL INDIRECT OR CONSE-
  44  * QUENTIAL DAMAGES, OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
  45  * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
  46  * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFOR-
  47  * MANCE OF THIS SOFTWARE.
  48  *
  49  * Except as contained in this notice, the name of a copyright holder shall
  50  * not be used in advertising or otherwise to promote the sale, use or
  51  * other dealings in this Software without prior written authorization of
  52  * the copyright holder.
  53  *
  54  * Authors:
  55  *   Kristian Høgsberg (krh@redhat.com)
  56  */
  57
  58 #if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
  59
  60 #include <X11/Xlib.h>
  61 #include <X11/extensions/Xfixes.h>
  62 #include <X11/Xlib-xcb.h>
  63 #include <X11/xshmfence.h>
  64 #include <xcb/xcb.h>
  65 #include <xcb/dri3.h>
  66 #include <xcb/present.h>
  67 #include <GL/gl.h>
  68 #include "glxclient.h"
  69 #include <dlfcn.h>
  70 #include <fcntl.h>
  71 #include <unistd.h>
  72 #include <sys/types.h>
  73 #include <sys/mman.h>
  74 #include <sys/time.h>
  75
  76 #include "dri_common.h"
  77 #include "dri3_priv.h"
  78 #include "loader.h"
  79 #include "dri2.h"
  80
  81 static struct dri3_drawable *
  82 loader_drawable_to_dri3_drawable(struct loader_dri3_drawable *draw) {
  83    size_t offset = offsetof(struct dri3_drawable, loader_drawable);
  84    if (!draw)
  85       return NULL;
  86    return (struct dri3_drawable *)(((void*) draw) - offset);
  87 }
  88
  89 static void
  90 glx_dri3_set_drawable_size(struct loader_dri3_drawable *draw,
  91                            int width, int height)
  92 {
  93    /* Nothing to do */
  94 }
  95
  96 static bool
  97 glx_dri3_in_current_context(struct loader_dri3_drawable *draw)
  98 {
  99    struct dri3_drawable *priv = loader_drawable_to_dri3_drawable(draw);
 100
 101    if (!priv)
 102       return false;
 103
 104    struct dri3_context *pcp = (struct dri3_context *) __glXGetCurrentContext();
 105    struct dri3_screen *psc = (struct dri3_screen *) priv->base.psc;
 106
 107    return (&pcp->base != &dummyContext) && pcp->base.psc == &psc->base;
 108 }
 109
 110 static __DRIcontext *
 111 glx_dri3_get_dri_context(struct loader_dri3_drawable *draw)
 112 {
 113    struct glx_context *gc = __glXGetCurrentContext();
 114    struct dri3_context *dri3Ctx = (struct dri3_context *) gc;
 115
 116    return (gc != &dummyContext) ? dri3Ctx->driContext : NULL;
 117 }
 118
 119 static __DRIscreen *
 120 glx_dri3_get_dri_screen(struct loader_dri3_drawable *draw)
 121 {
 122    struct glx_context *gc = __glXGetCurrentContext();
 123    struct dri3_context *pcp = (struct dri3_context *) gc;
 124    struct dri3_screen *psc = (struct dri3_screen *) pcp->base.psc;
 125
 126    return (gc != &dummyContext && psc) ? psc->driScreen : NULL;
 127 }
 128
 129 static void
 130 glx_dri3_flush_drawable(struct loader_dri3_drawable *draw, unsigned flags)
 131 {
 132    loader_dri3_flush(draw, flags, __DRI2_THROTTLE_SWAPBUFFER);
 133 }
 134
 135 static void
 136 glx_dri3_show_fps(struct loader_dri3_drawable *draw, uint64_t current_ust)
 137 {
 138    struct dri3_drawable *priv = loader_drawable_to_dri3_drawable(draw);
 139    const uint64_t interval =
 140       ((struct dri3_screen *) priv->base.psc)->show_fps_interval;
 141
 142    if (!interval)
 143       return;
 144
 145    priv->frames++;
 146
 147    /* DRI3+Present together uses microseconds for UST. */
 148    if (priv->previous_ust + interval * 1000000 <= current_ust) {
 149       if (priv->previous_ust) {
 150          fprintf(stderr, "libGL: FPS = %.1f\n",
 151                  ((uint64_t) priv->frames * 1000000) /
 152                  (double)(current_ust - priv->previous_ust));
 153       }
 154       priv->frames = 0;
 155       priv->previous_ust = current_ust;
 156    }
 157 }
 158
 159 static const struct loader_dri3_vtable glx_dri3_vtable = {
 160    .set_drawable_size = glx_dri3_set_drawable_size,
 161    .in_current_context = glx_dri3_in_current_context,
 162    .get_dri_context = glx_dri3_get_dri_context,
 163    .get_dri_screen = glx_dri3_get_dri_screen,
 164    .flush_drawable = glx_dri3_flush_drawable,
 165    .show_fps = glx_dri3_show_fps,
 166 };
 167
 168
 169 static const struct glx_context_vtable dri3_context_vtable;
 170
 171 static void
 172 dri3_destroy_context(struct glx_context *context)
 173 {
 174    struct dri3_context *pcp = (struct dri3_context *) context;
 175    struct dri3_screen *psc = (struct dri3_screen *) context->psc;
 176
 177    driReleaseDrawables(&pcp->base);
 178
 179    free((char *) context->extensions);
 180
 181    (*psc->core->destroyContext) (pcp->driContext);
 182
 183    free(pcp);
 184 }
 185
 186 static Bool
 187 dri3_bind_context(struct glx_context *context, struct glx_context *old,
 188                   GLXDrawable draw, GLXDrawable read)
 189 {
 190    struct dri3_context *pcp = (struct dri3_context *) context;
 191    struct dri3_screen *psc = (struct dri3_screen *) pcp->base.psc;
 192    struct dri3_drawable *pdraw, *pread;
 193    __DRIdrawable *dri_draw = NULL, *dri_read = NULL;
 194
 195    pdraw = (struct dri3_drawable *) driFetchDrawable(context, draw);
 196    pread = (struct dri3_drawable *) driFetchDrawable(context, read);
 197
 198    driReleaseDrawables(&pcp->base);
 199
 200    if (pdraw)
 201       dri_draw = pdraw->loader_drawable.dri_drawable;
 202    else if (draw != None)
 203       return GLXBadDrawable;
 204
 205    if (pread)
 206       dri_read = pread->loader_drawable.dri_drawable;
 207    else if (read != None)
 208       return GLXBadDrawable;
 209
 210    if (!(*psc->core->bindContext) (pcp->driContext, dri_draw, dri_read))
 211       return GLXBadContext;
 212
 213    if (dri_draw)
 214       (*psc->f->invalidate)(dri_draw);
 215    if (dri_read && dri_read != dri_draw)
 216       (*psc->f->invalidate)(dri_read);
 217
 218    return Success;
 219 }
 220
 221 static void
 222 dri3_unbind_context(struct glx_context *context, struct glx_context *new)
 223 {
 224    struct dri3_context *pcp = (struct dri3_context *) context;
 225    struct dri3_screen *psc = (struct dri3_screen *) pcp->base.psc;
 226
 227    (*psc->core->unbindContext) (pcp->driContext);
 228 }
 229
 230 static struct glx_context *
 231 dri3_create_context_attribs(struct glx_screen *base,
 232                             struct glx_config *config_base,
 233                             struct glx_context *shareList,
 234                             unsigned num_attribs,
 235                             const uint32_t *attribs,
 236                             unsigned *error)
 237 {
 238    struct dri3_context *pcp = NULL;
 239    struct dri3_context *pcp_shared = NULL;
 240    struct dri3_screen *psc = (struct dri3_screen *) base;
 241    __GLXDRIconfigPrivate *config = (__GLXDRIconfigPrivate *) config_base;
 242    __DRIcontext *shared = NULL;
 243
 244    uint32_t minor_ver = 1;
 245    uint32_t major_ver = 2;
 246    uint32_t flags = 0;
 247    unsigned api;
 248    int reset = __DRI_CTX_RESET_NO_NOTIFICATION;
 249    uint32_t ctx_attribs[2 * 5];
 250    unsigned num_ctx_attribs = 0;
 251    uint32_t render_type;
 252
 253    /* Remap the GLX tokens to DRI2 tokens.
 254     */
 255    if (!dri2_convert_glx_attribs(num_attribs, attribs,
 256                                  &major_ver, &minor_ver,
 257                                  &render_type, &flags, &api,
 258                                  &reset, error))
 259       goto error_exit;
 260
 261    /* Check the renderType value */
 262    if (!validate_renderType_against_config(config_base, render_type))
 263        goto error_exit;
 264
 265    if (shareList) {
 266       pcp_shared = (struct dri3_context *) shareList;
 267       shared = pcp_shared->driContext;
 268    }
 269
 270    pcp = calloc(1, sizeof *pcp);
 271    if (pcp == NULL) {
 272       *error = __DRI_CTX_ERROR_NO_MEMORY;
 273       goto error_exit;
 274    }
 275
 276    if (!glx_context_init(&pcp->base, &psc->base, &config->base))
 277       goto error_exit;
 278
 279    ctx_attribs[num_ctx_attribs++] = __DRI_CTX_ATTRIB_MAJOR_VERSION;
 280    ctx_attribs[num_ctx_attribs++] = major_ver;
 281    ctx_attribs[num_ctx_attribs++] = __DRI_CTX_ATTRIB_MINOR_VERSION;
 282    ctx_attribs[num_ctx_attribs++] = minor_ver;
 283
 284    /* Only send a value when the non-default value is requested.  By doing
 285     * this we don't have to check the driver's DRI3 version before sending the
 286     * default value.
 287     */
 288    if (reset != __DRI_CTX_RESET_NO_NOTIFICATION) {
 289       ctx_attribs[num_ctx_attribs++] = __DRI_CTX_ATTRIB_RESET_STRATEGY;
 290       ctx_attribs[num_ctx_attribs++] = reset;
 291    }
 292
 293    if (flags != 0) {
 294       ctx_attribs[num_ctx_attribs++] = __DRI_CTX_ATTRIB_FLAGS;
 295
 296       /* The current __DRI_CTX_FLAG_* values are identical to the
 297        * GLX_CONTEXT_*_BIT values.
 298        */
 299       ctx_attribs[num_ctx_attribs++] = flags;
 300    }
 301
 302    pcp->driContext =
 303       (*psc->image_driver->createContextAttribs) (psc->driScreen,
 304                                                   api,
 305                                                   config->driConfig,
 306                                                   shared,
 307                                                   num_ctx_attribs / 2,
 308                                                   ctx_attribs,
 309                                                   error,
 310                                                   pcp);
 311
 312    if (pcp->driContext == NULL)
 313       goto error_exit;
 314
 315    pcp->base.vtable = &dri3_context_vtable;
 316
 317    return &pcp->base;
 318
 319 error_exit:
 320    free(pcp);
 321
 322    return NULL;
 323 }
 324
 325 static struct glx_context *
 326 dri3_create_context(struct glx_screen *base,
 327                     struct glx_config *config_base,
 328                     struct glx_context *shareList, int renderType)
 329 {
 330    unsigned int error;
 331
 332    return dri3_create_context_attribs(base, config_base, shareList,
 333                                       0, NULL, &error);
 334 }
 335
 336 static void
 337 dri3_destroy_drawable(__GLXDRIdrawable *base)
 338 {
 339    struct dri3_drawable *pdraw = (struct dri3_drawable *) base;
 340
 341    loader_dri3_drawable_fini(&pdraw->loader_drawable);
 342
 343    free(pdraw);
 344 }
 345
 346 static __GLXDRIdrawable *
 347 dri3_create_drawable(struct glx_screen *base, XID xDrawable,
 348                      GLXDrawable drawable, struct glx_config *config_base)
 349 {
 350    struct dri3_drawable *pdraw;
 351    struct dri3_screen *psc = (struct dri3_screen *) base;
 352    __GLXDRIconfigPrivate *config = (__GLXDRIconfigPrivate *) config_base;
 353
 354    pdraw = calloc(1, sizeof(*pdraw));
 355    if (!pdraw)
 356       return NULL;
 357
 358    pdraw->base.destroyDrawable = dri3_destroy_drawable;
 359    pdraw->base.xDrawable = xDrawable;
 360    pdraw->base.drawable = drawable;
 361    pdraw->base.psc = &psc->base;
 362
 363    (void) __glXInitialize(psc->base.dpy);
 364
 365    if (loader_dri3_drawable_init(XGetXCBConnection(base->dpy),
 366                                  xDrawable, psc->driScreen,
 367                                  psc->is_different_gpu, config->driConfig,
 368                                  &psc->loader_dri3_ext, &glx_dri3_vtable,
 369                                  &pdraw->loader_drawable)) {
 370       free(pdraw);
 371       return NULL;
 372    }
 373
 374    return &pdraw->base;
 375 }
 376
 377 /** dri3_wait_for_msc
 378  *
 379  * Get the X server to send an event when the target msc/divisor/remainder is
 380  * reached.
 381  */
 382 static int
 383 dri3_wait_for_msc(__GLXDRIdrawable *pdraw, int64_t target_msc, int64_t divisor,
 384                   int64_t remainder, int64_t *ust, int64_t *msc, int64_t *sbc)
 385 {
 386    struct dri3_drawable *priv = (struct dri3_drawable *) pdraw;
 387
 388    loader_dri3_wait_for_msc(&priv->loader_drawable, target_msc, divisor,
 389                             remainder, ust, msc, sbc);
 390
 391    return 1;
 392 }
 393
 394 /** dri3_drawable_get_msc
 395  *
 396  * Return the current UST/MSC/SBC triplet by asking the server
 397  * for an event
 398  */
 399 static int
 400 dri3_drawable_get_msc(struct glx_screen *psc, __GLXDRIdrawable *pdraw,
 401                       int64_t *ust, int64_t *msc, int64_t *sbc)
 402 {
 403    return dri3_wait_for_msc(pdraw, 0, 0, 0, ust, msc,sbc);
 404 }
 405
 406 /** dri3_wait_for_sbc
 407  *
 408  * Wait for the completed swap buffer count to reach the specified
 409  * target. Presumably the application knows that this will be reached with
 410  * outstanding complete events, or we're going to be here awhile.
 411  */
 412 static int
 413 dri3_wait_for_sbc(__GLXDRIdrawable *pdraw, int64_t target_sbc, int64_t *ust,
 414                   int64_t *msc, int64_t *sbc)
 415 {
 416    struct dri3_drawable *priv = (struct dri3_drawable *) pdraw;
 417
 418    return loader_dri3_wait_for_sbc(&priv->loader_drawable, target_sbc,
 419                                    ust, msc, sbc);
 420 }
 421
 422 static void
 423 dri3_copy_sub_buffer(__GLXDRIdrawable *pdraw, int x, int y,
 424                      int width, int height,
 425                      Bool flush)
 426 {
 427    struct dri3_drawable *priv = (struct dri3_drawable *) pdraw;
 428
 429    loader_dri3_copy_sub_buffer(&priv->loader_drawable, x, y,
 430                                width, height, flush);
 431 }
 432
 433 static void
 434 dri3_wait_x(struct glx_context *gc)
 435 {
 436    struct dri3_drawable *priv = (struct dri3_drawable *)
 437       GetGLXDRIDrawable(gc->currentDpy, gc->currentDrawable);
 438
 439    if (priv)
 440       loader_dri3_wait_x(&priv->loader_drawable);
 441 }
 442
 443 static void
 444 dri3_wait_gl(struct glx_context *gc)
 445 {
 446    struct dri3_drawable *priv = (struct dri3_drawable *)
 447       GetGLXDRIDrawable(gc->currentDpy, gc->currentDrawable);
 448
 449    if (priv)
 450       loader_dri3_wait_gl(&priv->loader_drawable);
 451 }
 452
 453 /**
 454  * Called by the driver when it needs to update the real front buffer with the
 455  * contents of its fake front buffer.
 456  */
 457 static void
 458 dri3_flush_front_buffer(__DRIdrawable *driDrawable, void *loaderPrivate)
 459 {
 460    struct loader_dri3_drawable *draw = loaderPrivate;
 461    struct dri3_drawable *pdraw = loader_drawable_to_dri3_drawable(draw);
 462    struct dri3_screen *psc;
 463
 464    if (!pdraw)
 465       return;
 466
 467    if (!pdraw->base.psc)
 468       return;
 469
 470    psc = (struct dri3_screen *) pdraw->base.psc;
 471
 472    (void) __glXInitialize(psc->base.dpy);
 473
 474    loader_dri3_flush(draw, __DRI2_FLUSH_DRAWABLE, __DRI2_THROTTLE_FLUSHFRONT);
 475
 476    (*psc->f->invalidate)(driDrawable);
 477    loader_dri3_wait_gl(draw);
 478 }
 479
 480 /**
 481  * Make sure all pending swapbuffers have been submitted to hardware
 482  *
 483  * \param driDrawable[in]  Pointer to the dri drawable whose swaps we are
 484  * flushing.
 485  * \param loaderPrivate[in]  Pointer to the corresponding struct
 486  * loader_dri_drawable.
 487  */
 488 static void
 489 dri3_flush_swap_buffers(__DRIdrawable *driDrawable, void *loaderPrivate)
 490 {
 491    struct loader_dri3_drawable *draw = loaderPrivate;
 492    struct dri3_drawable *pdraw = loader_drawable_to_dri3_drawable(draw);
 493    struct dri3_screen *psc;
 494
 495    if (!pdraw)
 496       return;
 497
 498    if (!pdraw->base.psc)
 499       return;
 500
 501    psc = (struct dri3_screen *) pdraw->base.psc;
 502
 503    (void) __glXInitialize(psc->base.dpy);
 504    loader_dri3_swapbuffer_barrier(draw);
 505 }
 506
 507 static void
 508 dri_set_background_context(void *loaderPrivate)
 509 {
 510    struct dri3_context *pcp = (struct dri3_context *)loaderPrivate;
 511    __glXSetCurrentContext(&pcp->base);
 512 }
 513
 514 static GLboolean
 515 dri_is_thread_safe(void *loaderPrivate)
 516 {
 517    /* Unlike DRI2, DRI3 doesn't call GetBuffers/GetBuffersWithFormat
 518     * during draw so we're safe here.
 519     */
 520    return true;
 521 }
 522
 523 /* The image loader extension record for DRI3
 524  */
 525 static const __DRIimageLoaderExtension imageLoaderExtension = {
 526    .base = { __DRI_IMAGE_LOADER, 3 },
 527
 528    .getBuffers          = loader_dri3_get_buffers,
 529    .flushFrontBuffer    = dri3_flush_front_buffer,
 530    .flushSwapBuffers    = dri3_flush_swap_buffers,
 531 };
 532
 533 const __DRIuseInvalidateExtension dri3UseInvalidate = {
 534    .base = { __DRI_USE_INVALIDATE, 1 }
 535 };
 536
 537 static const __DRIbackgroundCallableExtension driBackgroundCallable = {
 538    .base = { __DRI_BACKGROUND_CALLABLE, 2 },
 539
 540    .setBackgroundContext = dri_set_background_context,
 541    .isThreadSafe         = dri_is_thread_safe,
 542 };
 543
 544 static const __DRIextension *loader_extensions[] = {
 545    &imageLoaderExtension.base,
 546    &dri3UseInvalidate.base,
 547    &driBackgroundCallable.base,
 548    NULL
 549 };
 550
 551 /** dri3_swap_buffers
 552  *
 553  * Make the current back buffer visible using the present extension
 554  */
 555 static int64_t
 556 dri3_swap_buffers(__GLXDRIdrawable *pdraw, int64_t target_msc, int64_t divisor,
 557                   int64_t remainder, Bool flush)
 558 {
 559    struct dri3_drawable *priv = (struct dri3_drawable *) pdraw;
 560    unsigned flags = __DRI2_FLUSH_DRAWABLE;
 561
 562    if (flush)
 563       flags |= __DRI2_FLUSH_CONTEXT;
 564
 565    return loader_dri3_swap_buffers_msc(&priv->loader_drawable,
 566                                        target_msc, divisor, remainder,
 567                                        flags, false);
 568 }
 569
 570 static int
 571 dri3_get_buffer_age(__GLXDRIdrawable *pdraw)
 572 {
 573    struct dri3_drawable *priv = (struct dri3_drawable *)pdraw;
 574
 575    return loader_dri3_query_buffer_age(&priv->loader_drawable);
 576 }
 577
 578 /** dri3_destroy_screen
 579  */
 580 static void
 581 dri3_destroy_screen(struct glx_screen *base)
 582 {
 583    struct dri3_screen *psc = (struct dri3_screen *) base;
 584
 585    /* Free the direct rendering per screen data */
 586    (*psc->core->destroyScreen) (psc->driScreen);
 587    driDestroyConfigs(psc->driver_configs);
 588    close(psc->fd);
 589    free(psc);
 590 }
 591
 592 /** dri3_set_swap_interval
 593  *
 594  * Record the application swap interval specification,
 595  */
 596 static int
 597 dri3_set_swap_interval(__GLXDRIdrawable *pdraw, int interval)
 598 {
 599    assert(pdraw != NULL);
 600
 601    struct dri3_drawable *priv =  (struct dri3_drawable *) pdraw;
 602    GLint vblank_mode = DRI_CONF_VBLANK_DEF_INTERVAL_1;
 603    struct dri3_screen *psc = (struct dri3_screen *) priv->base.psc;
 604
 605    if (psc->config)
 606       psc->config->configQueryi(psc->driScreen,
 607                                 "vblank_mode", &vblank_mode);
 608
 609    switch (vblank_mode) {
 610    case DRI_CONF_VBLANK_NEVER:
 611       if (interval != 0)
 612          return GLX_BAD_VALUE;
 613       break;
 614    case DRI_CONF_VBLANK_ALWAYS_SYNC:
 615       if (interval <= 0)
 616          return GLX_BAD_VALUE;
 617       break;
 618    default:
 619       break;
 620    }
 621
 622    priv->swap_interval = interval;
 623    loader_dri3_set_swap_interval(&priv->loader_drawable, interval);
 624
 625    return 0;
 626 }
 627
 628 /** dri3_get_swap_interval
 629  *
 630  * Return the stored swap interval
 631  */
 632 static int
 633 dri3_get_swap_interval(__GLXDRIdrawable *pdraw)
 634 {
 635    assert(pdraw != NULL);
 636
 637    struct dri3_drawable *priv =  (struct dri3_drawable *) pdraw;
 638
 639   return priv->swap_interval;
 640 }
 641
 642 static void
 643 dri3_bind_tex_image(Display * dpy,
 644                     GLXDrawable drawable,
 645                     int buffer, const int *attrib_list)
 646 {
 647    struct glx_context *gc = __glXGetCurrentContext();
 648    struct dri3_context *pcp = (struct dri3_context *) gc;
 649    __GLXDRIdrawable *base = GetGLXDRIDrawable(dpy, drawable);
 650    struct dri3_drawable *pdraw = (struct dri3_drawable *) base;
 651    struct dri3_screen *psc;
 652
 653    if (pdraw != NULL) {
 654       psc = (struct dri3_screen *) base->psc;
 655
 656       (*psc->f->invalidate)(pdraw->loader_drawable.dri_drawable);
 657
 658       XSync(dpy, false);
 659
 660       (*psc->texBuffer->setTexBuffer2) (pcp->driContext,
 661                                         pdraw->base.textureTarget,
 662                                         pdraw->base.textureFormat,
 663                                         pdraw->loader_drawable.dri_drawable);
 664    }
 665 }
 666
 667 static void
 668 dri3_release_tex_image(Display * dpy, GLXDrawable drawable, int buffer)
 669 {
 670    struct glx_context *gc = __glXGetCurrentContext();
 671    struct dri3_context *pcp = (struct dri3_context *) gc;
 672    __GLXDRIdrawable *base = GetGLXDRIDrawable(dpy, drawable);
 673    struct dri3_drawable *pdraw = (struct dri3_drawable *) base;
 674    struct dri3_screen *psc;
 675
 676    if (pdraw != NULL) {
 677       psc = (struct dri3_screen *) base->psc;
 678
 679       if (psc->texBuffer->base.version >= 3 &&
 680           psc->texBuffer->releaseTexBuffer != NULL)
 681          (*psc->texBuffer->releaseTexBuffer) (pcp->driContext,
 682                                               pdraw->base.textureTarget,
 683                                               pdraw->loader_drawable.dri_drawable);
 684    }
 685 }
 686
 687 static const struct glx_context_vtable dri3_context_vtable = {
 688    .destroy             = dri3_destroy_context,
 689    .bind                = dri3_bind_context,
 690    .unbind              = dri3_unbind_context,
 691    .wait_gl             = dri3_wait_gl,
 692    .wait_x              = dri3_wait_x,
 693    .use_x_font          = DRI_glXUseXFont,
 694    .bind_tex_image      = dri3_bind_tex_image,
 695    .release_tex_image   = dri3_release_tex_image,
 696    .get_proc_address    = NULL,
 697    .interop_query_device_info = dri3_interop_query_device_info,
 698    .interop_export_object = dri3_interop_export_object
 699 };
 700
 701 /** dri3_bind_extensions
 702  *
 703  * Enable all of the extensions supported on DRI3
 704  */
 705 static void
 706 dri3_bind_extensions(struct dri3_screen *psc, struct glx_display * priv,
 707                      const char *driverName)
 708 {
 709    const __DRIextension **extensions;
 710    unsigned mask;
 711    int i;
 712
 713    extensions = psc->core->getExtensions(psc->driScreen);
 714
 715    __glXEnableDirectExtension(&psc->base, "GLX_SGI_video_sync");
 716    __glXEnableDirectExtension(&psc->base, "GLX_SGI_swap_control");
 717    __glXEnableDirectExtension(&psc->base, "GLX_MESA_swap_control");
 718    __glXEnableDirectExtension(&psc->base, "GLX_SGI_make_current_read");
 719    __glXEnableDirectExtension(&psc->base, "GLX_INTEL_swap_event");
 720
 721    mask = psc->image_driver->getAPIMask(psc->driScreen);
 722
 723    __glXEnableDirectExtension(&psc->base, "GLX_ARB_create_context");
 724    __glXEnableDirectExtension(&psc->base, "GLX_ARB_create_context_profile");
 725
 726    if ((mask & ((1 << __DRI_API_GLES) |
 727                 (1 << __DRI_API_GLES2) |
 728                 (1 << __DRI_API_GLES3))) != 0) {
 729       __glXEnableDirectExtension(&psc->base,
 730                                  "GLX_EXT_create_context_es_profile");
 731       __glXEnableDirectExtension(&psc->base,
 732                                  "GLX_EXT_create_context_es2_profile");
 733    }
 734
 735    for (i = 0; extensions[i]; i++) {
 736       /* when on a different gpu than the server, the server pixmaps
 737        * can have a tiling mode we can't read. Thus we can't create
 738        * a texture from them.
 739        */
 740       if (!psc->is_different_gpu &&
 741          (strcmp(extensions[i]->name, __DRI_TEX_BUFFER) == 0)) {
 742          psc->texBuffer = (__DRItexBufferExtension *) extensions[i];
 743          __glXEnableDirectExtension(&psc->base, "GLX_EXT_texture_from_pixmap");
 744       }
 745
 746       if ((strcmp(extensions[i]->name, __DRI2_FLUSH) == 0)) {
 747          psc->f = (__DRI2flushExtension *) extensions[i];
 748          /* internal driver extension, no GL extension exposed */
 749       }
 750
 751       if (strcmp(extensions[i]->name, __DRI_IMAGE) == 0)
 752          psc->image = (__DRIimageExtension *) extensions[i];
 753
 754       if ((strcmp(extensions[i]->name, __DRI2_CONFIG_QUERY) == 0))
 755          psc->config = (__DRI2configQueryExtension *) extensions[i];
 756
 757       if (strcmp(extensions[i]->name, __DRI2_ROBUSTNESS) == 0)
 758          __glXEnableDirectExtension(&psc->base,
 759                                     "GLX_ARB_create_context_robustness");
 760
 761       if (strcmp(extensions[i]->name, __DRI2_RENDERER_QUERY) == 0) {
 762          psc->rendererQuery = (__DRI2rendererQueryExtension *) extensions[i];
 763          __glXEnableDirectExtension(&psc->base, "GLX_MESA_query_renderer");
 764       }
 765
 766       if (strcmp(extensions[i]->name, __DRI2_INTEROP) == 0)
 767          psc->interop = (__DRI2interopExtension*)extensions[i];
 768    }
 769 }
 770
 771 static const struct glx_screen_vtable dri3_screen_vtable = {
 772    .create_context         = dri3_create_context,
 773    .create_context_attribs = dri3_create_context_attribs,
 774    .query_renderer_integer = dri3_query_renderer_integer,
 775    .query_renderer_string  = dri3_query_renderer_string,
 776 };
 777
 778 /** dri3_create_screen
 779  *
 780  * Initialize DRI3 on the specified screen.
 781  *
 782  * Opens the DRI device, locates the appropriate DRI driver
 783  * and loads that.
 784  *
 785  * Checks to see if the driver supports the necessary extensions
 786  *
 787  * Initializes the driver for the screen and sets up our structures
 788  */
 789
 790 static struct glx_screen *
 791 dri3_create_screen(int screen, struct glx_display * priv)
 792 {
 793    xcb_connection_t *c = XGetXCBConnection(priv->dpy);
 794    const __DRIconfig **driver_configs;
 795    const __DRIextension **extensions;
 796    const struct dri3_display *const pdp = (struct dri3_display *)
 797       priv->dri3Display;
 798    struct dri3_screen *psc;
 799    __GLXDRIscreen *psp;
 800    struct glx_config *configs = NULL, *visuals = NULL;
 801    char *driverName, *deviceName, *tmp;
 802    int i;
 803    unsigned char disable;
 804
 805    psc = calloc(1, sizeof *psc);
 806    if (psc == NULL)
 807       return NULL;
 808
 809    psc->fd = -1;
 810
 811    if (!glx_screen_init(&psc->base, screen, priv)) {
 812       free(psc);
 813       return NULL;
 814    }
 815
 816    psc->fd = loader_dri3_open(c, RootWindow(priv->dpy, screen), None);
 817    if (psc->fd < 0) {
 818       int conn_error = xcb_connection_has_error(c);
 819
 820       glx_screen_cleanup(&psc->base);
 821       free(psc);
 822       InfoMessageF("screen %d does not appear to be DRI3 capable\n", screen);
 823
 824       if (conn_error)
 825          ErrorMessageF("Connection closed during DRI3 initialization failure");
 826
 827       return NULL;
 828    }
 829
 830    psc->fd = loader_get_user_preferred_fd(psc->fd, &psc->is_different_gpu);
 831    deviceName = NULL;
 832
 833    driverName = loader_get_driver_for_fd(psc->fd);
 834    if (!driverName) {
 835       ErrorMessageF("No driver found\n");
 836       goto handle_error;
 837    }
 838
 839    psc->driver = driOpenDriver(driverName);
 840    if (psc->driver == NULL) {
 841       ErrorMessageF("driver pointer missing\n");
 842       goto handle_error;
 843    }
 844
 845    extensions = driGetDriverExtensions(psc->driver, driverName);
 846    if (extensions == NULL)
 847       goto handle_error;
 848
 849    for (i = 0; extensions[i]; i++) {
 850       if (strcmp(extensions[i]->name, __DRI_CORE) == 0)
 851          psc->core = (__DRIcoreExtension *) extensions[i];
 852       if (strcmp(extensions[i]->name, __DRI_IMAGE_DRIVER) == 0)
 853          psc->image_driver = (__DRIimageDriverExtension *) extensions[i];
 854    }
 855
 856
 857    if (psc->core == NULL) {
 858       ErrorMessageF("core dri driver extension not found\n");
 859       goto handle_error;
 860    }
 861
 862    if (psc->image_driver == NULL) {
 863       ErrorMessageF("image driver extension not found\n");
 864       goto handle_error;
 865    }
 866
 867    psc->driScreen =
 868       psc->image_driver->createNewScreen2(screen, psc->fd,
 869                                           pdp->loader_extensions,
 870                                           extensions,
 871                                           &driver_configs, psc);
 872
 873    if (psc->driScreen == NULL) {
 874       ErrorMessageF("failed to create dri screen\n");
 875       goto handle_error;
 876    }
 877
 878    dri3_bind_extensions(psc, priv, driverName);
 879
 880    if (!psc->image || psc->image->base.version < 7 || !psc->image->createImageFromFds) {
 881       ErrorMessageF("Version 7 or imageFromFds image extension not found\n");
 882       goto handle_error;
 883    }
 884
 885    if (!psc->f || psc->f->base.version < 4) {
 886       ErrorMessageF("Version 4 or later of flush extension not found\n");
 887       goto handle_error;
 888    }
 889
 890    if (psc->is_different_gpu && psc->image->base.version < 9) {
 891       ErrorMessageF("Different GPU, but image extension version 9 or later not found\n");
 892       goto handle_error;
 893    }
 894
 895    if (psc->is_different_gpu && !psc->image->blitImage) {
 896       ErrorMessageF("Different GPU, but blitImage not implemented for this driver\n");
 897       goto handle_error;
 898    }
 899
 900    if (!psc->is_different_gpu && (
 901        !psc->texBuffer || psc->texBuffer->base.version < 2 ||
 902        !psc->texBuffer->setTexBuffer2
 903        )) {
 904       ErrorMessageF("Version 2 or later of texBuffer extension not found\n");
 905       goto handle_error;
 906    }
 907
 908    psc->loader_dri3_ext.core = psc->core;
 909    psc->loader_dri3_ext.image_driver = psc->image_driver;
 910    psc->loader_dri3_ext.flush = psc->f;
 911    psc->loader_dri3_ext.tex_buffer = psc->texBuffer;
 912    psc->loader_dri3_ext.image = psc->image;
 913    psc->loader_dri3_ext.config = psc->config;
 914
 915    configs = driConvertConfigs(psc->core, psc->base.configs, driver_configs);
 916    visuals = driConvertConfigs(psc->core, psc->base.visuals, driver_configs);
 917
 918    if (!configs || !visuals) {
 919        ErrorMessageF("No matching fbConfigs or visuals found\n");
 920        goto handle_error;
 921    }
 922
 923    glx_config_destroy_list(psc->base.configs);
 924    psc->base.configs = configs;
 925    glx_config_destroy_list(psc->base.visuals);
 926    psc->base.visuals = visuals;
 927
 928    psc->driver_configs = driver_configs;
 929
 930    psc->base.vtable = &dri3_screen_vtable;
 931    psp = &psc->vtable;
 932    psc->base.driScreen = psp;
 933    psp->destroyScreen = dri3_destroy_screen;
 934    psp->createDrawable = dri3_create_drawable;
 935    psp->swapBuffers = dri3_swap_buffers;
 936
 937    psp->getDrawableMSC = dri3_drawable_get_msc;
 938    psp->waitForMSC = dri3_wait_for_msc;
 939    psp->waitForSBC = dri3_wait_for_sbc;
 940    psp->setSwapInterval = dri3_set_swap_interval;
 941    psp->getSwapInterval = dri3_get_swap_interval;
 942    if (psc->config->configQueryb(psc->driScreen,
 943                                  "glx_disable_oml_sync_control",
 944                                  &disable) || !disable)
 945       __glXEnableDirectExtension(&psc->base, "GLX_OML_sync_control");
 946
 947    psp->copySubBuffer = dri3_copy_sub_buffer;
 948    __glXEnableDirectExtension(&psc->base, "GLX_MESA_copy_sub_buffer");
 949
 950    psp->getBufferAge = dri3_get_buffer_age;
 951    if (psc->config->configQueryb(psc->driScreen,
 952                                  "glx_disable_ext_buffer_age",
 953                                  &disable) || !disable)
 954       __glXEnableDirectExtension(&psc->base, "GLX_EXT_buffer_age");
 955
 956    free(driverName);
 957    free(deviceName);
 958
 959    tmp = getenv("LIBGL_SHOW_FPS");
 960    psc->show_fps_interval = tmp ? atoi(tmp) : 0;
 961    if (psc->show_fps_interval < 0)
 962       psc->show_fps_interval = 0;
 963
 964    InfoMessageF("Using DRI3 for screen %d\n", screen);
 965
 966    return &psc->base;
 967
 968 handle_error:
 969    CriticalErrorMessageF("failed to load driver: %s\n", driverName);
 970
 971    if (configs)
 972        glx_config_destroy_list(configs);
 973    if (visuals)
 974        glx_config_destroy_list(visuals);
 975    if (psc->driScreen)
 976        psc->core->destroyScreen(psc->driScreen);
 977    psc->driScreen = NULL;
 978    if (psc->fd >= 0)
 979       close(psc->fd);
 980    if (psc->driver)
 981       dlclose(psc->driver);
 982
 983    free(driverName);
 984    free(deviceName);
 985    glx_screen_cleanup(&psc->base);
 986    free(psc);
 987
 988    return NULL;
 989 }
 990
 991 /** dri_destroy_display
 992  *
 993  * Called from __glXFreeDisplayPrivate.
 994  */
 995 static void
 996 dri3_destroy_display(__GLXDRIdisplay * dpy)
 997 {
 998    free(dpy);
 999 }
1000
1001 /** dri3_create_display
1002  *
1003  * Allocate, initialize and return a __DRIdisplayPrivate object.
1004  * This is called from __glXInitialize() when we are given a new
1005  * display pointer. This is public to that function, but hidden from
1006  * outside of libGL.
1007  */
1008 _X_HIDDEN __GLXDRIdisplay *
1009 dri3_create_display(Display * dpy)
1010 {
1011    struct dri3_display                  *pdp;
1012    xcb_connection_t                     *c = XGetXCBConnection(dpy);
1013    xcb_dri3_query_version_cookie_t      dri3_cookie;
1014    xcb_dri3_query_version_reply_t       *dri3_reply;
1015    xcb_present_query_version_cookie_t   present_cookie;
1016    xcb_present_query_version_reply_t    *present_reply;
1017    xcb_generic_error_t                  *error;
1018    const xcb_query_extension_reply_t    *extension;
1019
1020    xcb_prefetch_extension_data(c, &xcb_dri3_id);
1021    xcb_prefetch_extension_data(c, &xcb_present_id);
1022
1023    extension = xcb_get_extension_data(c, &xcb_dri3_id);
1024    if (!(extension && extension->present))
1025       return NULL;
1026
1027    extension = xcb_get_extension_data(c, &xcb_present_id);
1028    if (!(extension && extension->present))
1029       return NULL;
1030
1031    dri3_cookie = xcb_dri3_query_version(c,
1032                                         XCB_DRI3_MAJOR_VERSION,
1033                                         XCB_DRI3_MINOR_VERSION);
1034
1035
1036    present_cookie = xcb_present_query_version(c,
1037                                    XCB_PRESENT_MAJOR_VERSION,
1038                                    XCB_PRESENT_MINOR_VERSION);
1039
1040    pdp = malloc(sizeof *pdp);
1041    if (pdp == NULL)
1042       return NULL;
1043
1044    dri3_reply = xcb_dri3_query_version_reply(c, dri3_cookie, &error);
1045    if (!dri3_reply) {
1046       free(error);
1047       goto no_extension;
1048    }
1049
1050    pdp->dri3Major = dri3_reply->major_version;
1051    pdp->dri3Minor = dri3_reply->minor_version;
1052    free(dri3_reply);
1053
1054    present_reply = xcb_present_query_version_reply(c, present_cookie, &error);
1055    if (!present_reply) {
1056       free(error);
1057       goto no_extension;
1058    }
1059    pdp->presentMajor = present_reply->major_version;
1060    pdp->presentMinor = present_reply->minor_version;
1061    free(present_reply);
1062
1063    pdp->base.destroyDisplay = dri3_destroy_display;
1064    pdp->base.createScreen = dri3_create_screen;
1065
1066    loader_set_logger(dri_message);
1067
1068    pdp->loader_extensions = loader_extensions;
1069
1070    return &pdp->base;
1071 no_extension:
1072    free(pdp);
1073    return NULL;
1074 }
1075
1076 #endif /* GLX_DIRECT_RENDERING */