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 int
  90 glx_dri3_get_swap_interval(struct loader_dri3_drawable *draw)
  91 {
  92    struct dri3_drawable *priv = loader_drawable_to_dri3_drawable(draw);
  93
  94    return priv->swap_interval;
  95 }
  96
  97 static int
  98 glx_dri3_clamp_swap_interval(struct loader_dri3_drawable *draw, int interval)
  99 {
 100    return interval;
 101 }
 102
 103 static void
 104 glx_dri3_set_swap_interval(struct loader_dri3_drawable *draw, int interval)
 105 {
 106    struct dri3_drawable *priv = loader_drawable_to_dri3_drawable(draw);
 107
 108    priv->swap_interval = interval;
 109 }
 110
 111 static void
 112 glx_dri3_set_drawable_size(struct loader_dri3_drawable *draw,
 113                            int width, int height)
 114 {
 115    /* Nothing to do */
 116 }
 117
 118 static bool
 119 glx_dri3_in_current_context(struct loader_dri3_drawable *draw)
 120 {
 121    struct dri3_drawable *priv = loader_drawable_to_dri3_drawable(draw);
 122
 123    if (!priv)
 124       return false;
 125
 126    struct dri3_context *pcp = (struct dri3_context *) __glXGetCurrentContext();
 127    struct dri3_screen *psc = (struct dri3_screen *) priv->base.psc;
 128
 129    return (&pcp->base != &dummyContext) && pcp->base.psc == &psc->base;
 130 }
 131
 132 static __DRIcontext *
 133 glx_dri3_get_dri_context(struct loader_dri3_drawable *draw)
 134 {
 135    struct glx_context *gc = __glXGetCurrentContext();
 136    struct dri3_context *dri3Ctx = (struct dri3_context *) gc;
 137
 138    return (gc != &dummyContext) ? dri3Ctx->driContext : NULL;
 139 }
 140
 141 static __DRIscreen *
 142 glx_dri3_get_dri_screen(struct loader_dri3_drawable *draw)
 143 {
 144    struct glx_context *gc = __glXGetCurrentContext();
 145    struct dri3_context *pcp = (struct dri3_context *) gc;
 146    struct dri3_screen *psc = (struct dri3_screen *) pcp->base.psc;
 147
 148    return (gc != &dummyContext && psc) ? psc->driScreen : NULL;
 149 }
 150
 151 static void
 152 glx_dri3_flush_drawable(struct loader_dri3_drawable *draw, unsigned flags)
 153 {
 154    loader_dri3_flush(draw, flags, __DRI2_THROTTLE_SWAPBUFFER);
 155 }
 156
 157 static void
 158 glx_dri3_show_fps(struct loader_dri3_drawable *draw, uint64_t current_ust)
 159 {
 160    struct dri3_drawable *priv = loader_drawable_to_dri3_drawable(draw);
 161    const uint64_t interval =
 162       ((struct dri3_screen *) priv->base.psc)->show_fps_interval;
 163
 164    if (!interval)
 165       return;
 166
 167    priv->frames++;
 168
 169    /* DRI3+Present together uses microseconds for UST. */
 170    if (priv->previous_ust + interval * 1000000 <= current_ust) {
 171       if (priv->previous_ust) {
 172          fprintf(stderr, "libGL: FPS = %.1f\n",
 173                  ((uint64_t) priv->frames * 1000000) /
 174                  (double)(current_ust - priv->previous_ust));
 175       }
 176       priv->frames = 0;
 177       priv->previous_ust = current_ust;
 178    }
 179 }
 180
 181 static const struct loader_dri3_vtable glx_dri3_vtable = {
 182    .get_swap_interval = glx_dri3_get_swap_interval,
 183    .clamp_swap_interval = glx_dri3_clamp_swap_interval,
 184    .set_swap_interval = glx_dri3_set_swap_interval,
 185    .set_drawable_size = glx_dri3_set_drawable_size,
 186    .in_current_context = glx_dri3_in_current_context,
 187    .get_dri_context = glx_dri3_get_dri_context,
 188    .get_dri_screen = glx_dri3_get_dri_screen,
 189    .flush_drawable = glx_dri3_flush_drawable,
 190    .show_fps = glx_dri3_show_fps,
 191 };
 192
 193
 194 static const struct glx_context_vtable dri3_context_vtable;
 195
 196 static void
 197 dri3_destroy_context(struct glx_context *context)
 198 {
 199    struct dri3_context *pcp = (struct dri3_context *) context;
 200    struct dri3_screen *psc = (struct dri3_screen *) context->psc;
 201
 202    driReleaseDrawables(&pcp->base);
 203
 204    free((char *) context->extensions);
 205
 206    (*psc->core->destroyContext) (pcp->driContext);
 207
 208    free(pcp);
 209 }
 210
 211 static Bool
 212 dri3_bind_context(struct glx_context *context, struct glx_context *old,
 213                   GLXDrawable draw, GLXDrawable read)
 214 {
 215    struct dri3_context *pcp = (struct dri3_context *) context;
 216    struct dri3_screen *psc = (struct dri3_screen *) pcp->base.psc;
 217    struct dri3_drawable *pdraw, *pread;
 218    __DRIdrawable *dri_draw = NULL, *dri_read = NULL;
 219
 220    pdraw = (struct dri3_drawable *) driFetchDrawable(context, draw);
 221    pread = (struct dri3_drawable *) driFetchDrawable(context, read);
 222
 223    driReleaseDrawables(&pcp->base);
 224
 225    if (pdraw)
 226       dri_draw = pdraw->loader_drawable.dri_drawable;
 227    else if (draw != None)
 228       return GLXBadDrawable;
 229
 230    if (pread)
 231       dri_read = pread->loader_drawable.dri_drawable;
 232    else if (read != None)
 233       return GLXBadDrawable;
 234
 235    if (!(*psc->core->bindContext) (pcp->driContext, dri_draw, dri_read))
 236       return GLXBadContext;
 237
 238    if (dri_draw)
 239       (*psc->f->invalidate)(dri_draw);
 240    if (dri_read && dri_read != dri_draw)
 241       (*psc->f->invalidate)(dri_read);
 242
 243    return Success;
 244 }
 245
 246 static void
 247 dri3_unbind_context(struct glx_context *context, struct glx_context *new)
 248 {
 249    struct dri3_context *pcp = (struct dri3_context *) context;
 250    struct dri3_screen *psc = (struct dri3_screen *) pcp->base.psc;
 251
 252    (*psc->core->unbindContext) (pcp->driContext);
 253 }
 254
 255 static struct glx_context *
 256 dri3_create_context_attribs(struct glx_screen *base,
 257                             struct glx_config *config_base,
 258                             struct glx_context *shareList,
 259                             unsigned num_attribs,
 260                             const uint32_t *attribs,
 261                             unsigned *error)
 262 {
 263    struct dri3_context *pcp = NULL;
 264    struct dri3_context *pcp_shared = NULL;
 265    struct dri3_screen *psc = (struct dri3_screen *) base;
 266    __GLXDRIconfigPrivate *config = (__GLXDRIconfigPrivate *) config_base;
 267    __DRIcontext *shared = NULL;
 268
 269    uint32_t minor_ver = 1;
 270    uint32_t major_ver = 2;
 271    uint32_t flags = 0;
 272    unsigned api;
 273    int reset = __DRI_CTX_RESET_NO_NOTIFICATION;
 274    uint32_t ctx_attribs[2 * 5];
 275    unsigned num_ctx_attribs = 0;
 276    uint32_t render_type;
 277
 278    /* Remap the GLX tokens to DRI2 tokens.
 279     */
 280    if (!dri2_convert_glx_attribs(num_attribs, attribs,
 281                                  &major_ver, &minor_ver,
 282                                  &render_type, &flags, &api,
 283                                  &reset, error))
 284       goto error_exit;
 285
 286    /* Check the renderType value */
 287    if (!validate_renderType_against_config(config_base, render_type))
 288        goto error_exit;
 289
 290    if (shareList) {
 291       pcp_shared = (struct dri3_context *) shareList;
 292       shared = pcp_shared->driContext;
 293    }
 294
 295    pcp = calloc(1, sizeof *pcp);
 296    if (pcp == NULL) {
 297       *error = __DRI_CTX_ERROR_NO_MEMORY;
 298       goto error_exit;
 299    }
 300
 301    if (!glx_context_init(&pcp->base, &psc->base, &config->base))
 302       goto error_exit;
 303
 304    ctx_attribs[num_ctx_attribs++] = __DRI_CTX_ATTRIB_MAJOR_VERSION;
 305    ctx_attribs[num_ctx_attribs++] = major_ver;
 306    ctx_attribs[num_ctx_attribs++] = __DRI_CTX_ATTRIB_MINOR_VERSION;
 307    ctx_attribs[num_ctx_attribs++] = minor_ver;
 308
 309    /* Only send a value when the non-default value is requested.  By doing
 310     * this we don't have to check the driver's DRI3 version before sending the
 311     * default value.
 312     */
 313    if (reset != __DRI_CTX_RESET_NO_NOTIFICATION) {
 314       ctx_attribs[num_ctx_attribs++] = __DRI_CTX_ATTRIB_RESET_STRATEGY;
 315       ctx_attribs[num_ctx_attribs++] = reset;
 316    }
 317
 318    if (flags != 0) {
 319       ctx_attribs[num_ctx_attribs++] = __DRI_CTX_ATTRIB_FLAGS;
 320
 321       /* The current __DRI_CTX_FLAG_* values are identical to the
 322        * GLX_CONTEXT_*_BIT values.
 323        */
 324       ctx_attribs[num_ctx_attribs++] = flags;
 325    }
 326
 327    pcp->driContext =
 328       (*psc->image_driver->createContextAttribs) (psc->driScreen,
 329                                                   api,
 330                                                   config->driConfig,
 331                                                   shared,
 332                                                   num_ctx_attribs / 2,
 333                                                   ctx_attribs,
 334                                                   error,
 335                                                   pcp);
 336
 337    if (pcp->driContext == NULL)
 338       goto error_exit;
 339
 340    pcp->base.vtable = &dri3_context_vtable;
 341
 342    return &pcp->base;
 343
 344 error_exit:
 345    free(pcp);
 346
 347    return NULL;
 348 }
 349
 350 static struct glx_context *
 351 dri3_create_context(struct glx_screen *base,
 352                     struct glx_config *config_base,
 353                     struct glx_context *shareList, int renderType)
 354 {
 355    unsigned int error;
 356
 357    return dri3_create_context_attribs(base, config_base, shareList,
 358                                       0, NULL, &error);
 359 }
 360
 361 static void
 362 dri3_destroy_drawable(__GLXDRIdrawable *base)
 363 {
 364    struct dri3_drawable *pdraw = (struct dri3_drawable *) base;
 365
 366    loader_dri3_drawable_fini(&pdraw->loader_drawable);
 367
 368    free(pdraw);
 369 }
 370
 371 static __GLXDRIdrawable *
 372 dri3_create_drawable(struct glx_screen *base, XID xDrawable,
 373                      GLXDrawable drawable, struct glx_config *config_base)
 374 {
 375    struct dri3_drawable *pdraw;
 376    struct dri3_screen *psc = (struct dri3_screen *) base;
 377    __GLXDRIconfigPrivate *config = (__GLXDRIconfigPrivate *) config_base;
 378
 379    pdraw = calloc(1, sizeof(*pdraw));
 380    if (!pdraw)
 381       return NULL;
 382
 383    pdraw->base.destroyDrawable = dri3_destroy_drawable;
 384    pdraw->base.xDrawable = xDrawable;
 385    pdraw->base.drawable = drawable;
 386    pdraw->base.psc = &psc->base;
 387
 388    (void) __glXInitialize(psc->base.dpy);
 389
 390    if (loader_dri3_drawable_init(XGetXCBConnection(base->dpy),
 391                                  xDrawable, psc->driScreen,
 392                                  psc->is_different_gpu, config->driConfig,
 393                                  &psc->loader_dri3_ext, &glx_dri3_vtable,
 394                                  &pdraw->loader_drawable)) {
 395       free(pdraw);
 396       return NULL;
 397    }
 398
 399    return &pdraw->base;
 400 }
 401
 402 /** dri3_wait_for_msc
 403  *
 404  * Get the X server to send an event when the target msc/divisor/remainder is
 405  * reached.
 406  */
 407 static int
 408 dri3_wait_for_msc(__GLXDRIdrawable *pdraw, int64_t target_msc, int64_t divisor,
 409                   int64_t remainder, int64_t *ust, int64_t *msc, int64_t *sbc)
 410 {
 411    struct dri3_drawable *priv = (struct dri3_drawable *) pdraw;
 412
 413    loader_dri3_wait_for_msc(&priv->loader_drawable, target_msc, divisor,
 414                             remainder, ust, msc, sbc);
 415
 416    return 1;
 417 }
 418
 419 /** dri3_drawable_get_msc
 420  *
 421  * Return the current UST/MSC/SBC triplet by asking the server
 422  * for an event
 423  */
 424 static int
 425 dri3_drawable_get_msc(struct glx_screen *psc, __GLXDRIdrawable *pdraw,
 426                       int64_t *ust, int64_t *msc, int64_t *sbc)
 427 {
 428    return dri3_wait_for_msc(pdraw, 0, 0, 0, ust, msc,sbc);
 429 }
 430
 431 /** dri3_wait_for_sbc
 432  *
 433  * Wait for the completed swap buffer count to reach the specified
 434  * target. Presumably the application knows that this will be reached with
 435  * outstanding complete events, or we're going to be here awhile.
 436  */
 437 static int
 438 dri3_wait_for_sbc(__GLXDRIdrawable *pdraw, int64_t target_sbc, int64_t *ust,
 439                   int64_t *msc, int64_t *sbc)
 440 {
 441    struct dri3_drawable *priv = (struct dri3_drawable *) pdraw;
 442
 443    return loader_dri3_wait_for_sbc(&priv->loader_drawable, target_sbc,
 444                                    ust, msc, sbc);
 445 }
 446
 447 static void
 448 dri3_copy_sub_buffer(__GLXDRIdrawable *pdraw, int x, int y,
 449                      int width, int height,
 450                      Bool flush)
 451 {
 452    struct dri3_drawable *priv = (struct dri3_drawable *) pdraw;
 453
 454    loader_dri3_copy_sub_buffer(&priv->loader_drawable, x, y,
 455                                width, height, flush);
 456 }
 457
 458 static void
 459 dri3_wait_x(struct glx_context *gc)
 460 {
 461    struct dri3_drawable *priv = (struct dri3_drawable *)
 462       GetGLXDRIDrawable(gc->currentDpy, gc->currentDrawable);
 463
 464    if (priv)
 465       loader_dri3_wait_x(&priv->loader_drawable);
 466 }
 467
 468 static void
 469 dri3_wait_gl(struct glx_context *gc)
 470 {
 471    struct dri3_drawable *priv = (struct dri3_drawable *)
 472       GetGLXDRIDrawable(gc->currentDpy, gc->currentDrawable);
 473
 474    if (priv)
 475       loader_dri3_wait_gl(&priv->loader_drawable);
 476 }
 477
 478 /**
 479  * Called by the driver when it needs to update the real front buffer with the
 480  * contents of its fake front buffer.
 481  */
 482 static void
 483 dri3_flush_front_buffer(__DRIdrawable *driDrawable, void *loaderPrivate)
 484 {
 485    struct loader_dri3_drawable *draw = loaderPrivate;
 486    struct dri3_drawable *pdraw = loader_drawable_to_dri3_drawable(draw);
 487    struct dri3_screen *psc;
 488
 489    if (!pdraw)
 490       return;
 491
 492    if (!pdraw->base.psc)
 493       return;
 494
 495    psc = (struct dri3_screen *) pdraw->base.psc;
 496
 497    (void) __glXInitialize(psc->base.dpy);
 498
 499    loader_dri3_flush(draw, __DRI2_FLUSH_DRAWABLE, __DRI2_THROTTLE_FLUSHFRONT);
 500
 501    (*psc->f->invalidate)(driDrawable);
 502    loader_dri3_wait_gl(draw);
 503 }
 504
 505 static void
 506 dri_set_background_context(void *loaderPrivate)
 507 {
 508    struct dri3_context *pcp = (struct dri3_context *)loaderPrivate;
 509    __glXSetCurrentContext(&pcp->base);
 510 }
 511
 512 static GLboolean
 513 dri_is_thread_safe(void *loaderPrivate)
 514 {
 515    /* Unlike DRI2, DRI3 doesn't call GetBuffers/GetBuffersWithFormat
 516     * during draw so we're safe here.
 517     */
 518    return true;
 519 }
 520
 521 /* The image loader extension record for DRI3
 522  */
 523 static const __DRIimageLoaderExtension imageLoaderExtension = {
 524    .base = { __DRI_IMAGE_LOADER, 1 },
 525
 526    .getBuffers          = loader_dri3_get_buffers,
 527    .flushFrontBuffer    = dri3_flush_front_buffer,
 528 };
 529
 530 const __DRIuseInvalidateExtension dri3UseInvalidate = {
 531    .base = { __DRI_USE_INVALIDATE, 1 }
 532 };
 533
 534 static const __DRIbackgroundCallableExtension driBackgroundCallable = {
 535    .base = { __DRI_BACKGROUND_CALLABLE, 2 },
 536
 537    .setBackgroundContext = dri_set_background_context,
 538    .isThreadSafe         = dri_is_thread_safe,
 539 };
 540
 541 static const __DRIextension *loader_extensions[] = {
 542    &imageLoaderExtension.base,
 543    &dri3UseInvalidate.base,
 544    &driBackgroundCallable.base,
 545    NULL
 546 };
 547
 548 /** dri3_swap_buffers
 549  *
 550  * Make the current back buffer visible using the present extension
 551  */
 552 static int64_t
 553 dri3_swap_buffers(__GLXDRIdrawable *pdraw, int64_t target_msc, int64_t divisor,
 554                   int64_t remainder, Bool flush)
 555 {
 556    struct dri3_drawable *priv = (struct dri3_drawable *) pdraw;
 557    unsigned flags = __DRI2_FLUSH_DRAWABLE;
 558
 559    if (flush)
 560       flags |= __DRI2_FLUSH_CONTEXT;
 561
 562    return loader_dri3_swap_buffers_msc(&priv->loader_drawable,
 563                                        target_msc, divisor, remainder,
 564                                        flags, false);
 565 }
 566
 567 static int
 568 dri3_get_buffer_age(__GLXDRIdrawable *pdraw)
 569 {
 570    struct dri3_drawable *priv = (struct dri3_drawable *)pdraw;
 571
 572    return loader_dri3_query_buffer_age(&priv->loader_drawable);
 573 }
 574
 575 /** dri3_destroy_screen
 576  */
 577 static void
 578 dri3_destroy_screen(struct glx_screen *base)
 579 {
 580    struct dri3_screen *psc = (struct dri3_screen *) base;
 581
 582    /* Free the direct rendering per screen data */
 583    (*psc->core->destroyScreen) (psc->driScreen);
 584    driDestroyConfigs(psc->driver_configs);
 585    close(psc->fd);
 586    free(psc);
 587 }
 588
 589 /** dri3_set_swap_interval
 590  *
 591  * Record the application swap interval specification,
 592  */
 593 static int
 594 dri3_set_swap_interval(__GLXDRIdrawable *pdraw, int interval)
 595 {
 596    assert(pdraw != NULL);
 597
 598    struct dri3_drawable *priv =  (struct dri3_drawable *) pdraw;
 599    GLint vblank_mode = DRI_CONF_VBLANK_DEF_INTERVAL_1;
 600    struct dri3_screen *psc = (struct dri3_screen *) priv->base.psc;
 601
 602    if (psc->config)
 603       psc->config->configQueryi(psc->driScreen,
 604                                 "vblank_mode", &vblank_mode);
 605
 606    switch (vblank_mode) {
 607    case DRI_CONF_VBLANK_NEVER:
 608       if (interval != 0)
 609          return GLX_BAD_VALUE;
 610       break;
 611    case DRI_CONF_VBLANK_ALWAYS_SYNC:
 612       if (interval <= 0)
 613          return GLX_BAD_VALUE;
 614       break;
 615    default:
 616       break;
 617    }
 618
 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 }
 766
 767 static const struct glx_screen_vtable dri3_screen_vtable = {
 768    .create_context         = dri3_create_context,
 769    .create_context_attribs = dri3_create_context_attribs,
 770    .query_renderer_integer = dri3_query_renderer_integer,
 771    .query_renderer_string  = dri3_query_renderer_string,
 772 };
 773
 774 /** dri3_create_screen
 775  *
 776  * Initialize DRI3 on the specified screen.
 777  *
 778  * Opens the DRI device, locates the appropriate DRI driver
 779  * and loads that.
 780  *
 781  * Checks to see if the driver supports the necessary extensions
 782  *
 783  * Initializes the driver for the screen and sets up our structures
 784  */
 785
 786 static struct glx_screen *
 787 dri3_create_screen(int screen, struct glx_display * priv)
 788 {
 789    xcb_connection_t *c = XGetXCBConnection(priv->dpy);
 790    const __DRIconfig **driver_configs;
 791    const __DRIextension **extensions;
 792    const struct dri3_display *const pdp = (struct dri3_display *)
 793       priv->dri3Display;
 794    struct dri3_screen *psc;
 795    __GLXDRIscreen *psp;
 796    struct glx_config *configs = NULL, *visuals = NULL;
 797    char *driverName, *deviceName, *tmp;
 798    int i;
 799    unsigned char disable;
 800
 801    psc = calloc(1, sizeof *psc);
 802    if (psc == NULL)
 803       return NULL;
 804
 805    psc->fd = -1;
 806
 807    if (!glx_screen_init(&psc->base, screen, priv)) {
 808       free(psc);
 809       return NULL;
 810    }
 811
 812    psc->fd = loader_dri3_open(c, RootWindow(priv->dpy, screen), None);
 813    if (psc->fd < 0) {
 814       int conn_error = xcb_connection_has_error(c);
 815
 816       glx_screen_cleanup(&psc->base);
 817       free(psc);
 818       InfoMessageF("screen %d does not appear to be DRI3 capable\n", screen);
 819
 820       if (conn_error)
 821          ErrorMessageF("Connection closed during DRI3 initialization failure");
 822
 823       return NULL;
 824    }
 825
 826    psc->fd = loader_get_user_preferred_fd(psc->fd, &psc->is_different_gpu);
 827    deviceName = NULL;
 828
 829    driverName = loader_get_driver_for_fd(psc->fd);
 830    if (!driverName) {
 831       ErrorMessageF("No driver found\n");
 832       goto handle_error;
 833    }
 834
 835    psc->driver = driOpenDriver(driverName);
 836    if (psc->driver == NULL) {
 837       ErrorMessageF("driver pointer missing\n");
 838       goto handle_error;
 839    }
 840
 841    extensions = driGetDriverExtensions(psc->driver, driverName);
 842    if (extensions == NULL)
 843       goto handle_error;
 844
 845    for (i = 0; extensions[i]; i++) {
 846       if (strcmp(extensions[i]->name, __DRI_CORE) == 0)
 847          psc->core = (__DRIcoreExtension *) extensions[i];
 848       if (strcmp(extensions[i]->name, __DRI_IMAGE_DRIVER) == 0)
 849          psc->image_driver = (__DRIimageDriverExtension *) extensions[i];
 850    }
 851
 852
 853    if (psc->core == NULL) {
 854       ErrorMessageF("core dri driver extension not found\n");
 855       goto handle_error;
 856    }
 857
 858    if (psc->image_driver == NULL) {
 859       ErrorMessageF("image driver extension not found\n");
 860       goto handle_error;
 861    }
 862
 863    psc->driScreen =
 864       psc->image_driver->createNewScreen2(screen, psc->fd,
 865                                           pdp->loader_extensions,
 866                                           extensions,
 867                                           &driver_configs, psc);
 868
 869    if (psc->driScreen == NULL) {
 870       ErrorMessageF("failed to create dri screen\n");
 871       goto handle_error;
 872    }
 873
 874    dri3_bind_extensions(psc, priv, driverName);
 875
 876    if (!psc->image || psc->image->base.version < 7 || !psc->image->createImageFromFds) {
 877       ErrorMessageF("Version 7 or imageFromFds image extension not found\n");
 878       goto handle_error;
 879    }
 880
 881    if (!psc->f || psc->f->base.version < 4) {
 882       ErrorMessageF("Version 4 or later of flush extension not found\n");
 883       goto handle_error;
 884    }
 885
 886    if (psc->is_different_gpu && psc->image->base.version < 9) {
 887       ErrorMessageF("Different GPU, but image extension version 9 or later not found\n");
 888       goto handle_error;
 889    }
 890
 891    if (psc->is_different_gpu && !psc->image->blitImage) {
 892       ErrorMessageF("Different GPU, but blitImage not implemented for this driver\n");
 893       goto handle_error;
 894    }
 895
 896    if (!psc->is_different_gpu && (
 897        !psc->texBuffer || psc->texBuffer->base.version < 2 ||
 898        !psc->texBuffer->setTexBuffer2
 899        )) {
 900       ErrorMessageF("Version 2 or later of texBuffer extension not found\n");
 901       goto handle_error;
 902    }
 903
 904    psc->loader_dri3_ext.core = psc->core;
 905    psc->loader_dri3_ext.image_driver = psc->image_driver;
 906    psc->loader_dri3_ext.flush = psc->f;
 907    psc->loader_dri3_ext.tex_buffer = psc->texBuffer;
 908    psc->loader_dri3_ext.image = psc->image;
 909    psc->loader_dri3_ext.config = psc->config;
 910
 911    configs = driConvertConfigs(psc->core, psc->base.configs, driver_configs);
 912    visuals = driConvertConfigs(psc->core, psc->base.visuals, driver_configs);
 913
 914    if (!configs || !visuals) {
 915        ErrorMessageF("No matching fbConfigs or visuals found\n");
 916        goto handle_error;
 917    }
 918
 919    glx_config_destroy_list(psc->base.configs);
 920    psc->base.configs = configs;
 921    glx_config_destroy_list(psc->base.visuals);
 922    psc->base.visuals = visuals;
 923
 924    psc->driver_configs = driver_configs;
 925
 926    psc->base.vtable = &dri3_screen_vtable;
 927    psp = &psc->vtable;
 928    psc->base.driScreen = psp;
 929    psp->destroyScreen = dri3_destroy_screen;
 930    psp->createDrawable = dri3_create_drawable;
 931    psp->swapBuffers = dri3_swap_buffers;
 932
 933    psp->getDrawableMSC = dri3_drawable_get_msc;
 934    psp->waitForMSC = dri3_wait_for_msc;
 935    psp->waitForSBC = dri3_wait_for_sbc;
 936    psp->setSwapInterval = dri3_set_swap_interval;
 937    psp->getSwapInterval = dri3_get_swap_interval;
 938    if (psc->config->configQueryb(psc->driScreen,
 939                                  "glx_disable_oml_sync_control",
 940                                  &disable) || !disable)
 941       __glXEnableDirectExtension(&psc->base, "GLX_OML_sync_control");
 942
 943    psp->copySubBuffer = dri3_copy_sub_buffer;
 944    __glXEnableDirectExtension(&psc->base, "GLX_MESA_copy_sub_buffer");
 945
 946    psp->getBufferAge = dri3_get_buffer_age;
 947    if (psc->config->configQueryb(psc->driScreen,
 948                                  "glx_disable_ext_buffer_age",
 949                                  &disable) || !disable)
 950       __glXEnableDirectExtension(&psc->base, "GLX_EXT_buffer_age");
 951
 952    free(driverName);
 953    free(deviceName);
 954
 955    tmp = getenv("LIBGL_SHOW_FPS");
 956    psc->show_fps_interval = tmp ? atoi(tmp) : 0;
 957    if (psc->show_fps_interval < 0)
 958       psc->show_fps_interval = 0;
 959
 960    InfoMessageF("Using DRI3 for screen %d\n", screen);
 961
 962    return &psc->base;
 963
 964 handle_error:
 965    CriticalErrorMessageF("failed to load driver: %s\n", driverName);
 966
 967    if (configs)
 968        glx_config_destroy_list(configs);
 969    if (visuals)
 970        glx_config_destroy_list(visuals);
 971    if (psc->driScreen)
 972        psc->core->destroyScreen(psc->driScreen);
 973    psc->driScreen = NULL;
 974    if (psc->fd >= 0)
 975       close(psc->fd);
 976    if (psc->driver)
 977       dlclose(psc->driver);
 978
 979    free(driverName);
 980    free(deviceName);
 981    glx_screen_cleanup(&psc->base);
 982    free(psc);
 983
 984    return NULL;
 985 }
 986
 987 /** dri_destroy_display
 988  *
 989  * Called from __glXFreeDisplayPrivate.
 990  */
 991 static void
 992 dri3_destroy_display(__GLXDRIdisplay * dpy)
 993 {
 994    free(dpy);
 995 }
 996
 997 /** dri3_create_display
 998  *
 999  * Allocate, initialize and return a __DRIdisplayPrivate object.
1000  * This is called from __glXInitialize() when we are given a new
1001  * display pointer. This is public to that function, but hidden from
1002  * outside of libGL.
1003  */
1004 _X_HIDDEN __GLXDRIdisplay *
1005 dri3_create_display(Display * dpy)
1006 {
1007    struct dri3_display                  *pdp;
1008    xcb_connection_t                     *c = XGetXCBConnection(dpy);
1009    xcb_dri3_query_version_cookie_t      dri3_cookie;
1010    xcb_dri3_query_version_reply_t       *dri3_reply;
1011    xcb_present_query_version_cookie_t   present_cookie;
1012    xcb_present_query_version_reply_t    *present_reply;
1013    xcb_generic_error_t                  *error;
1014    const xcb_query_extension_reply_t    *extension;
1015
1016    xcb_prefetch_extension_data(c, &xcb_dri3_id);
1017    xcb_prefetch_extension_data(c, &xcb_present_id);
1018
1019    extension = xcb_get_extension_data(c, &xcb_dri3_id);
1020    if (!(extension && extension->present))
1021       return NULL;
1022
1023    extension = xcb_get_extension_data(c, &xcb_present_id);
1024    if (!(extension && extension->present))
1025       return NULL;
1026
1027    dri3_cookie = xcb_dri3_query_version(c,
1028                                         XCB_DRI3_MAJOR_VERSION,
1029                                         XCB_DRI3_MINOR_VERSION);
1030
1031
1032    present_cookie = xcb_present_query_version(c,
1033                                    XCB_PRESENT_MAJOR_VERSION,
1034                                    XCB_PRESENT_MINOR_VERSION);
1035
1036    pdp = malloc(sizeof *pdp);
1037    if (pdp == NULL)
1038       return NULL;
1039
1040    dri3_reply = xcb_dri3_query_version_reply(c, dri3_cookie, &error);
1041    if (!dri3_reply) {
1042       free(error);
1043       goto no_extension;
1044    }
1045
1046    pdp->dri3Major = dri3_reply->major_version;
1047    pdp->dri3Minor = dri3_reply->minor_version;
1048    free(dri3_reply);
1049
1050    present_reply = xcb_present_query_version_reply(c, present_cookie, &error);
1051    if (!present_reply) {
1052       free(error);
1053       goto no_extension;
1054    }
1055    pdp->presentMajor = present_reply->major_version;
1056    pdp->presentMinor = present_reply->minor_version;
1057    free(present_reply);
1058
1059    pdp->base.destroyDisplay = dri3_destroy_display;
1060    pdp->base.createScreen = dri3_create_screen;
1061
1062    loader_set_logger(dri_message);
1063
1064    pdp->loader_extensions = loader_extensions;
1065
1066    return &pdp->base;
1067 no_extension:
1068    free(pdp);
1069    return NULL;
1070 }
1071
1072 #endif /* GLX_DIRECT_RENDERING */