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 void
 120 glx_dri3_flush_drawable(struct loader_dri3_drawable *draw, unsigned flags)
 121 {
 122    loader_dri3_flush(draw, flags, __DRI2_THROTTLE_SWAPBUFFER);
 123 }
 124
 125 static void
 126 glx_dri3_show_fps(struct loader_dri3_drawable *draw, uint64_t current_ust)
 127 {
 128    struct dri3_drawable *priv = loader_drawable_to_dri3_drawable(draw);
 129    const uint64_t interval =
 130       ((struct dri3_screen *) priv->base.psc)->show_fps_interval;
 131
 132    if (!interval)
 133       return;
 134
 135    priv->frames++;
 136
 137    /* DRI3+Present together uses microseconds for UST. */
 138    if (priv->previous_ust + interval * 1000000 <= current_ust) {
 139       if (priv->previous_ust) {
 140          fprintf(stderr, "libGL: FPS = %.1f\n",
 141                  ((uint64_t) priv->frames * 1000000) /
 142                  (double)(current_ust - priv->previous_ust));
 143       }
 144       priv->frames = 0;
 145       priv->previous_ust = current_ust;
 146    }
 147 }
 148
 149 static const struct loader_dri3_vtable glx_dri3_vtable = {
 150    .set_drawable_size = glx_dri3_set_drawable_size,
 151    .in_current_context = glx_dri3_in_current_context,
 152    .get_dri_context = glx_dri3_get_dri_context,
 153    .flush_drawable = glx_dri3_flush_drawable,
 154    .show_fps = glx_dri3_show_fps,
 155 };
 156
 157
 158 static const struct glx_context_vtable dri3_context_vtable;
 159
 160 static void
 161 dri3_destroy_context(struct glx_context *context)
 162 {
 163    struct dri3_context *pcp = (struct dri3_context *) context;
 164    struct dri3_screen *psc = (struct dri3_screen *) context->psc;
 165
 166    driReleaseDrawables(&pcp->base);
 167
 168    free((char *) context->extensions);
 169
 170    (*psc->core->destroyContext) (pcp->driContext);
 171
 172    free(pcp);
 173 }
 174
 175 static Bool
 176 dri3_bind_context(struct glx_context *context, struct glx_context *old,
 177                   GLXDrawable draw, GLXDrawable read)
 178 {
 179    struct dri3_context *pcp = (struct dri3_context *) context;
 180    struct dri3_screen *psc = (struct dri3_screen *) pcp->base.psc;
 181    struct dri3_drawable *pdraw, *pread;
 182    __DRIdrawable *dri_draw = NULL, *dri_read = NULL;
 183
 184    pdraw = (struct dri3_drawable *) driFetchDrawable(context, draw);
 185    pread = (struct dri3_drawable *) driFetchDrawable(context, read);
 186
 187    driReleaseDrawables(&pcp->base);
 188
 189    if (pdraw)
 190       dri_draw = pdraw->loader_drawable.dri_drawable;
 191    else if (draw != None)
 192       return GLXBadDrawable;
 193
 194    if (pread)
 195       dri_read = pread->loader_drawable.dri_drawable;
 196    else if (read != None)
 197       return GLXBadDrawable;
 198
 199    if (!(*psc->core->bindContext) (pcp->driContext, dri_draw, dri_read))
 200       return GLXBadContext;
 201
 202    if (dri_draw)
 203       (*psc->f->invalidate)(dri_draw);
 204    if (dri_read && dri_read != dri_draw)
 205       (*psc->f->invalidate)(dri_read);
 206
 207    return Success;
 208 }
 209
 210 static void
 211 dri3_unbind_context(struct glx_context *context, struct glx_context *new)
 212 {
 213    struct dri3_context *pcp = (struct dri3_context *) context;
 214    struct dri3_screen *psc = (struct dri3_screen *) pcp->base.psc;
 215
 216    (*psc->core->unbindContext) (pcp->driContext);
 217 }
 218
 219 static struct glx_context *
 220 dri3_create_context_attribs(struct glx_screen *base,
 221                             struct glx_config *config_base,
 222                             struct glx_context *shareList,
 223                             unsigned num_attribs,
 224                             const uint32_t *attribs,
 225                             unsigned *error)
 226 {
 227    struct dri3_context *pcp = NULL;
 228    struct dri3_context *pcp_shared = NULL;
 229    struct dri3_screen *psc = (struct dri3_screen *) base;
 230    __GLXDRIconfigPrivate *config = (__GLXDRIconfigPrivate *) config_base;
 231    __DRIcontext *shared = NULL;
 232
 233    uint32_t minor_ver = 1;
 234    uint32_t major_ver = 2;
 235    uint32_t flags = 0;
 236    unsigned api;
 237    int reset = __DRI_CTX_RESET_NO_NOTIFICATION;
 238    int release = __DRI_CTX_RELEASE_BEHAVIOR_FLUSH;
 239    uint32_t ctx_attribs[2 * 6];
 240    unsigned num_ctx_attribs = 0;
 241    uint32_t render_type;
 242
 243    /* Remap the GLX tokens to DRI2 tokens.
 244     */
 245    if (!dri2_convert_glx_attribs(num_attribs, attribs,
 246                                  &major_ver, &minor_ver,
 247                                  &render_type, &flags, &api,
 248                                  &reset, &release, error))
 249       goto error_exit;
 250
 251    /* Check the renderType value */
 252    if (!validate_renderType_against_config(config_base, render_type))
 253        goto error_exit;
 254
 255    if (shareList) {
 256       pcp_shared = (struct dri3_context *) shareList;
 257       shared = pcp_shared->driContext;
 258    }
 259
 260    pcp = calloc(1, sizeof *pcp);
 261    if (pcp == NULL) {
 262       *error = __DRI_CTX_ERROR_NO_MEMORY;
 263       goto error_exit;
 264    }
 265
 266    if (!glx_context_init(&pcp->base, &psc->base, &config->base))
 267       goto error_exit;
 268
 269    ctx_attribs[num_ctx_attribs++] = __DRI_CTX_ATTRIB_MAJOR_VERSION;
 270    ctx_attribs[num_ctx_attribs++] = major_ver;
 271    ctx_attribs[num_ctx_attribs++] = __DRI_CTX_ATTRIB_MINOR_VERSION;
 272    ctx_attribs[num_ctx_attribs++] = minor_ver;
 273
 274    /* Only send a value when the non-default value is requested.  By doing
 275     * this we don't have to check the driver's DRI3 version before sending the
 276     * default value.
 277     */
 278    if (reset != __DRI_CTX_RESET_NO_NOTIFICATION) {
 279       ctx_attribs[num_ctx_attribs++] = __DRI_CTX_ATTRIB_RESET_STRATEGY;
 280       ctx_attribs[num_ctx_attribs++] = reset;
 281    }
 282
 283    if (release != __DRI_CTX_RELEASE_BEHAVIOR_FLUSH) {
 284       ctx_attribs[num_ctx_attribs++] = __DRI_CTX_ATTRIB_RELEASE_BEHAVIOR;
 285       ctx_attribs[num_ctx_attribs++] = release;
 286    }
 287
 288    if (flags != 0) {
 289       ctx_attribs[num_ctx_attribs++] = __DRI_CTX_ATTRIB_FLAGS;
 290
 291       /* The current __DRI_CTX_FLAG_* values are identical to the
 292        * GLX_CONTEXT_*_BIT values.
 293        */
 294       ctx_attribs[num_ctx_attribs++] = flags;
 295    }
 296
 297    pcp->driContext =
 298       (*psc->image_driver->createContextAttribs) (psc->driScreen,
 299                                                   api,
 300                                                   config->driConfig,
 301                                                   shared,
 302                                                   num_ctx_attribs / 2,
 303                                                   ctx_attribs,
 304                                                   error,
 305                                                   pcp);
 306
 307    if (pcp->driContext == NULL)
 308       goto error_exit;
 309
 310    pcp->base.vtable = &dri3_context_vtable;
 311
 312    return &pcp->base;
 313
 314 error_exit:
 315    free(pcp);
 316
 317    return NULL;
 318 }
 319
 320 static struct glx_context *
 321 dri3_create_context(struct glx_screen *base,
 322                     struct glx_config *config_base,
 323                     struct glx_context *shareList, int renderType)
 324 {
 325    unsigned int error;
 326
 327    return dri3_create_context_attribs(base, config_base, shareList,
 328                                       0, NULL, &error);
 329 }
 330
 331 static void
 332 dri3_destroy_drawable(__GLXDRIdrawable *base)
 333 {
 334    struct dri3_drawable *pdraw = (struct dri3_drawable *) base;
 335
 336    loader_dri3_drawable_fini(&pdraw->loader_drawable);
 337
 338    free(pdraw);
 339 }
 340
 341 static __GLXDRIdrawable *
 342 dri3_create_drawable(struct glx_screen *base, XID xDrawable,
 343                      GLXDrawable drawable, struct glx_config *config_base)
 344 {
 345    struct dri3_drawable *pdraw;
 346    struct dri3_screen *psc = (struct dri3_screen *) base;
 347    __GLXDRIconfigPrivate *config = (__GLXDRIconfigPrivate *) config_base;
 348
 349    pdraw = calloc(1, sizeof(*pdraw));
 350    if (!pdraw)
 351       return NULL;
 352
 353    pdraw->base.destroyDrawable = dri3_destroy_drawable;
 354    pdraw->base.xDrawable = xDrawable;
 355    pdraw->base.drawable = drawable;
 356    pdraw->base.psc = &psc->base;
 357
 358    (void) __glXInitialize(psc->base.dpy);
 359
 360    if (loader_dri3_drawable_init(XGetXCBConnection(base->dpy),
 361                                  xDrawable, psc->driScreen,
 362                                  psc->is_different_gpu, config->driConfig,
 363                                  &psc->loader_dri3_ext, &glx_dri3_vtable,
 364                                  &pdraw->loader_drawable)) {
 365       free(pdraw);
 366       return NULL;
 367    }
 368
 369    return &pdraw->base;
 370 }
 371
 372 /** dri3_wait_for_msc
 373  *
 374  * Get the X server to send an event when the target msc/divisor/remainder is
 375  * reached.
 376  */
 377 static int
 378 dri3_wait_for_msc(__GLXDRIdrawable *pdraw, int64_t target_msc, int64_t divisor,
 379                   int64_t remainder, int64_t *ust, int64_t *msc, int64_t *sbc)
 380 {
 381    struct dri3_drawable *priv = (struct dri3_drawable *) pdraw;
 382
 383    loader_dri3_wait_for_msc(&priv->loader_drawable, target_msc, divisor,
 384                             remainder, ust, msc, sbc);
 385
 386    return 1;
 387 }
 388
 389 /** dri3_drawable_get_msc
 390  *
 391  * Return the current UST/MSC/SBC triplet by asking the server
 392  * for an event
 393  */
 394 static int
 395 dri3_drawable_get_msc(struct glx_screen *psc, __GLXDRIdrawable *pdraw,
 396                       int64_t *ust, int64_t *msc, int64_t *sbc)
 397 {
 398    return dri3_wait_for_msc(pdraw, 0, 0, 0, ust, msc,sbc);
 399 }
 400
 401 /** dri3_wait_for_sbc
 402  *
 403  * Wait for the completed swap buffer count to reach the specified
 404  * target. Presumably the application knows that this will be reached with
 405  * outstanding complete events, or we're going to be here awhile.
 406  */
 407 static int
 408 dri3_wait_for_sbc(__GLXDRIdrawable *pdraw, int64_t target_sbc, int64_t *ust,
 409                   int64_t *msc, int64_t *sbc)
 410 {
 411    struct dri3_drawable *priv = (struct dri3_drawable *) pdraw;
 412
 413    return loader_dri3_wait_for_sbc(&priv->loader_drawable, target_sbc,
 414                                    ust, msc, sbc);
 415 }
 416
 417 static void
 418 dri3_copy_sub_buffer(__GLXDRIdrawable *pdraw, int x, int y,
 419                      int width, int height,
 420                      Bool flush)
 421 {
 422    struct dri3_drawable *priv = (struct dri3_drawable *) pdraw;
 423
 424    loader_dri3_copy_sub_buffer(&priv->loader_drawable, x, y,
 425                                width, height, flush);
 426 }
 427
 428 static void
 429 dri3_wait_x(struct glx_context *gc)
 430 {
 431    struct dri3_drawable *priv = (struct dri3_drawable *)
 432       GetGLXDRIDrawable(gc->currentDpy, gc->currentDrawable);
 433
 434    if (priv)
 435       loader_dri3_wait_x(&priv->loader_drawable);
 436 }
 437
 438 static void
 439 dri3_wait_gl(struct glx_context *gc)
 440 {
 441    struct dri3_drawable *priv = (struct dri3_drawable *)
 442       GetGLXDRIDrawable(gc->currentDpy, gc->currentDrawable);
 443
 444    if (priv)
 445       loader_dri3_wait_gl(&priv->loader_drawable);
 446 }
 447
 448 /**
 449  * Called by the driver when it needs to update the real front buffer with the
 450  * contents of its fake front buffer.
 451  */
 452 static void
 453 dri3_flush_front_buffer(__DRIdrawable *driDrawable, void *loaderPrivate)
 454 {
 455    struct loader_dri3_drawable *draw = loaderPrivate;
 456    struct dri3_drawable *pdraw = loader_drawable_to_dri3_drawable(draw);
 457    struct dri3_screen *psc;
 458
 459    if (!pdraw)
 460       return;
 461
 462    if (!pdraw->base.psc)
 463       return;
 464
 465    psc = (struct dri3_screen *) pdraw->base.psc;
 466
 467    (void) __glXInitialize(psc->base.dpy);
 468
 469    loader_dri3_flush(draw, __DRI2_FLUSH_DRAWABLE, __DRI2_THROTTLE_FLUSHFRONT);
 470
 471    (*psc->f->invalidate)(driDrawable);
 472    loader_dri3_wait_gl(draw);
 473 }
 474
 475 /**
 476  * Make sure all pending swapbuffers have been submitted to hardware
 477  *
 478  * \param driDrawable[in]  Pointer to the dri drawable whose swaps we are
 479  * flushing.
 480  * \param loaderPrivate[in]  Pointer to the corresponding struct
 481  * loader_dri_drawable.
 482  */
 483 static void
 484 dri3_flush_swap_buffers(__DRIdrawable *driDrawable, void *loaderPrivate)
 485 {
 486    struct loader_dri3_drawable *draw = loaderPrivate;
 487    struct dri3_drawable *pdraw = loader_drawable_to_dri3_drawable(draw);
 488    struct dri3_screen *psc;
 489
 490    if (!pdraw)
 491       return;
 492
 493    if (!pdraw->base.psc)
 494       return;
 495
 496    psc = (struct dri3_screen *) pdraw->base.psc;
 497
 498    (void) __glXInitialize(psc->base.dpy);
 499    loader_dri3_swapbuffer_barrier(draw);
 500 }
 501
 502 static void
 503 dri_set_background_context(void *loaderPrivate)
 504 {
 505    struct dri3_context *pcp = (struct dri3_context *)loaderPrivate;
 506    __glXSetCurrentContext(&pcp->base);
 507 }
 508
 509 static GLboolean
 510 dri_is_thread_safe(void *loaderPrivate)
 511 {
 512    /* Unlike DRI2, DRI3 doesn't call GetBuffers/GetBuffersWithFormat
 513     * during draw so we're safe here.
 514     */
 515    return true;
 516 }
 517
 518 /* The image loader extension record for DRI3
 519  */
 520 static const __DRIimageLoaderExtension imageLoaderExtension = {
 521    .base = { __DRI_IMAGE_LOADER, 3 },
 522
 523    .getBuffers          = loader_dri3_get_buffers,
 524    .flushFrontBuffer    = dri3_flush_front_buffer,
 525    .flushSwapBuffers    = dri3_flush_swap_buffers,
 526 };
 527
 528 const __DRIuseInvalidateExtension dri3UseInvalidate = {
 529    .base = { __DRI_USE_INVALIDATE, 1 }
 530 };
 531
 532 static const __DRIbackgroundCallableExtension driBackgroundCallable = {
 533    .base = { __DRI_BACKGROUND_CALLABLE, 2 },
 534
 535    .setBackgroundContext = dri_set_background_context,
 536    .isThreadSafe         = dri_is_thread_safe,
 537 };
 538
 539 static const __DRIextension *loader_extensions[] = {
 540    &imageLoaderExtension.base,
 541    &dri3UseInvalidate.base,
 542    &driBackgroundCallable.base,
 543    NULL
 544 };
 545
 546 /** dri3_swap_buffers
 547  *
 548  * Make the current back buffer visible using the present extension
 549  */
 550 static int64_t
 551 dri3_swap_buffers(__GLXDRIdrawable *pdraw, int64_t target_msc, int64_t divisor,
 552                   int64_t remainder, Bool flush)
 553 {
 554    struct dri3_drawable *priv = (struct dri3_drawable *) pdraw;
 555    unsigned flags = __DRI2_FLUSH_DRAWABLE;
 556
 557    if (flush)
 558       flags |= __DRI2_FLUSH_CONTEXT;
 559
 560    return loader_dri3_swap_buffers_msc(&priv->loader_drawable,
 561                                        target_msc, divisor, remainder,
 562                                        flags, false);
 563 }
 564
 565 static int
 566 dri3_get_buffer_age(__GLXDRIdrawable *pdraw)
 567 {
 568    struct dri3_drawable *priv = (struct dri3_drawable *)pdraw;
 569
 570    return loader_dri3_query_buffer_age(&priv->loader_drawable);
 571 }
 572
 573 /** dri3_destroy_screen
 574  */
 575 static void
 576 dri3_destroy_screen(struct glx_screen *base)
 577 {
 578    struct dri3_screen *psc = (struct dri3_screen *) base;
 579
 580    /* Free the direct rendering per screen data */
 581    loader_dri3_close_screen(psc->driScreen);
 582    (*psc->core->destroyScreen) (psc->driScreen);
 583    driDestroyConfigs(psc->driver_configs);
 584    close(psc->fd);
 585    free(psc);
 586 }
 587
 588 /** dri3_set_swap_interval
 589  *
 590  * Record the application swap interval specification,
 591  */
 592 static int
 593 dri3_set_swap_interval(__GLXDRIdrawable *pdraw, int interval)
 594 {
 595    assert(pdraw != NULL);
 596
 597    struct dri3_drawable *priv =  (struct dri3_drawable *) pdraw;
 598    GLint vblank_mode = DRI_CONF_VBLANK_DEF_INTERVAL_1;
 599    struct dri3_screen *psc = (struct dri3_screen *) priv->base.psc;
 600
 601    if (psc->config)
 602       psc->config->configQueryi(psc->driScreen,
 603                                 "vblank_mode", &vblank_mode);
 604
 605    switch (vblank_mode) {
 606    case DRI_CONF_VBLANK_NEVER:
 607       if (interval != 0)
 608          return GLX_BAD_VALUE;
 609       break;
 610    case DRI_CONF_VBLANK_ALWAYS_SYNC:
 611       if (interval <= 0)
 612          return GLX_BAD_VALUE;
 613       break;
 614    default:
 615       break;
 616    }
 617
 618    priv->swap_interval = interval;
 619    loader_dri3_set_swap_interval(&priv->loader_drawable, interval);
 620
 621    return 0;
 622 }
 623
 624 /** dri3_get_swap_interval
 625  *
 626  * Return the stored swap interval
 627  */
 628 static int
 629 dri3_get_swap_interval(__GLXDRIdrawable *pdraw)
 630 {
 631    assert(pdraw != NULL);
 632
 633    struct dri3_drawable *priv =  (struct dri3_drawable *) pdraw;
 634
 635   return priv->swap_interval;
 636 }
 637
 638 static void
 639 dri3_bind_tex_image(Display * dpy,
 640                     GLXDrawable drawable,
 641                     int buffer, const int *attrib_list)
 642 {
 643    struct glx_context *gc = __glXGetCurrentContext();
 644    struct dri3_context *pcp = (struct dri3_context *) gc;
 645    __GLXDRIdrawable *base = GetGLXDRIDrawable(dpy, drawable);
 646    struct dri3_drawable *pdraw = (struct dri3_drawable *) base;
 647    struct dri3_screen *psc;
 648
 649    if (pdraw != NULL) {
 650       psc = (struct dri3_screen *) base->psc;
 651
 652       (*psc->f->invalidate)(pdraw->loader_drawable.dri_drawable);
 653
 654       XSync(dpy, false);
 655
 656       (*psc->texBuffer->setTexBuffer2) (pcp->driContext,
 657                                         pdraw->base.textureTarget,
 658                                         pdraw->base.textureFormat,
 659                                         pdraw->loader_drawable.dri_drawable);
 660    }
 661 }
 662
 663 static void
 664 dri3_release_tex_image(Display * dpy, GLXDrawable drawable, int buffer)
 665 {
 666    struct glx_context *gc = __glXGetCurrentContext();
 667    struct dri3_context *pcp = (struct dri3_context *) gc;
 668    __GLXDRIdrawable *base = GetGLXDRIDrawable(dpy, drawable);
 669    struct dri3_drawable *pdraw = (struct dri3_drawable *) base;
 670    struct dri3_screen *psc;
 671
 672    if (pdraw != NULL) {
 673       psc = (struct dri3_screen *) base->psc;
 674
 675       if (psc->texBuffer->base.version >= 3 &&
 676           psc->texBuffer->releaseTexBuffer != NULL)
 677          (*psc->texBuffer->releaseTexBuffer) (pcp->driContext,
 678                                               pdraw->base.textureTarget,
 679                                               pdraw->loader_drawable.dri_drawable);
 680    }
 681 }
 682
 683 static const struct glx_context_vtable dri3_context_vtable = {
 684    .destroy             = dri3_destroy_context,
 685    .bind                = dri3_bind_context,
 686    .unbind              = dri3_unbind_context,
 687    .wait_gl             = dri3_wait_gl,
 688    .wait_x              = dri3_wait_x,
 689    .use_x_font          = DRI_glXUseXFont,
 690    .bind_tex_image      = dri3_bind_tex_image,
 691    .release_tex_image   = dri3_release_tex_image,
 692    .get_proc_address    = NULL,
 693    .interop_query_device_info = dri3_interop_query_device_info,
 694    .interop_export_object = dri3_interop_export_object
 695 };
 696
 697 /** dri3_bind_extensions
 698  *
 699  * Enable all of the extensions supported on DRI3
 700  */
 701 static void
 702 dri3_bind_extensions(struct dri3_screen *psc, struct glx_display * priv,
 703                      const char *driverName)
 704 {
 705    const __DRIextension **extensions;
 706    unsigned mask;
 707    int i;
 708
 709    extensions = psc->core->getExtensions(psc->driScreen);
 710
 711    __glXEnableDirectExtension(&psc->base, "GLX_SGI_video_sync");
 712    __glXEnableDirectExtension(&psc->base, "GLX_SGI_swap_control");
 713    __glXEnableDirectExtension(&psc->base, "GLX_MESA_swap_control");
 714    __glXEnableDirectExtension(&psc->base, "GLX_SGI_make_current_read");
 715    __glXEnableDirectExtension(&psc->base, "GLX_INTEL_swap_event");
 716
 717    mask = psc->image_driver->getAPIMask(psc->driScreen);
 718
 719    __glXEnableDirectExtension(&psc->base, "GLX_ARB_create_context");
 720    __glXEnableDirectExtension(&psc->base, "GLX_ARB_create_context_profile");
 721
 722    if ((mask & ((1 << __DRI_API_GLES) |
 723                 (1 << __DRI_API_GLES2) |
 724                 (1 << __DRI_API_GLES3))) != 0) {
 725       __glXEnableDirectExtension(&psc->base,
 726                                  "GLX_EXT_create_context_es_profile");
 727       __glXEnableDirectExtension(&psc->base,
 728                                  "GLX_EXT_create_context_es2_profile");
 729    }
 730
 731    for (i = 0; extensions[i]; i++) {
 732       /* when on a different gpu than the server, the server pixmaps
 733        * can have a tiling mode we can't read. Thus we can't create
 734        * a texture from them.
 735        */
 736       if (!psc->is_different_gpu &&
 737          (strcmp(extensions[i]->name, __DRI_TEX_BUFFER) == 0)) {
 738          psc->texBuffer = (__DRItexBufferExtension *) extensions[i];
 739          __glXEnableDirectExtension(&psc->base, "GLX_EXT_texture_from_pixmap");
 740       }
 741
 742       if ((strcmp(extensions[i]->name, __DRI2_FLUSH) == 0)) {
 743          psc->f = (__DRI2flushExtension *) extensions[i];
 744          /* internal driver extension, no GL extension exposed */
 745       }
 746
 747       if (strcmp(extensions[i]->name, __DRI_IMAGE) == 0)
 748          psc->image = (__DRIimageExtension *) extensions[i];
 749
 750       if ((strcmp(extensions[i]->name, __DRI2_CONFIG_QUERY) == 0))
 751          psc->config = (__DRI2configQueryExtension *) extensions[i];
 752
 753       if (strcmp(extensions[i]->name, __DRI2_ROBUSTNESS) == 0)
 754          __glXEnableDirectExtension(&psc->base,
 755                                     "GLX_ARB_create_context_robustness");
 756
 757       if (strcmp(extensions[i]->name, __DRI2_RENDERER_QUERY) == 0) {
 758          psc->rendererQuery = (__DRI2rendererQueryExtension *) extensions[i];
 759          __glXEnableDirectExtension(&psc->base, "GLX_MESA_query_renderer");
 760       }
 761
 762       if (strcmp(extensions[i]->name, __DRI2_INTEROP) == 0)
 763          psc->interop = (__DRI2interopExtension*)extensions[i];
 764
 765       if (strcmp(extensions[i]->name, __DRI2_FLUSH_CONTROL) == 0)
 766          __glXEnableDirectExtension(&psc->base,
 767                                     "GLX_ARB_context_flush_control");
 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 */