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 void
  98 glx_dri3_set_swap_interval(struct loader_dri3_drawable *draw, int interval)
  99 {
 100    struct dri3_drawable *priv = loader_drawable_to_dri3_drawable(draw);
 101
 102    priv->swap_interval = interval;
 103 }
 104
 105 static void
 106 glx_dri3_set_drawable_size(struct loader_dri3_drawable *draw,
 107                            int width, int height)
 108 {
 109    /* Nothing to do */
 110 }
 111
 112 static bool
 113 glx_dri3_in_current_context(struct loader_dri3_drawable *draw)
 114 {
 115    struct dri3_drawable *priv = loader_drawable_to_dri3_drawable(draw);
 116
 117    if (!priv)
 118       return false;
 119
 120    struct dri3_context *pcp = (struct dri3_context *) __glXGetCurrentContext();
 121    struct dri3_screen *psc = (struct dri3_screen *) priv->base.psc;
 122
 123    return (&pcp->base != &dummyContext) && pcp->base.psc == &psc->base;
 124 }
 125
 126 static __DRIcontext *
 127 glx_dri3_get_dri_context(struct loader_dri3_drawable *draw)
 128 {
 129    struct glx_context *gc = __glXGetCurrentContext();
 130    struct dri3_context *dri3Ctx = (struct dri3_context *) gc;
 131
 132    return (gc != &dummyContext) ? dri3Ctx->driContext : NULL;
 133 }
 134
 135 static __DRIscreen *
 136 glx_dri3_get_dri_screen(struct loader_dri3_drawable *draw)
 137 {
 138    struct glx_context *gc = __glXGetCurrentContext();
 139    struct dri3_context *pcp = (struct dri3_context *) gc;
 140    struct dri3_screen *psc = (struct dri3_screen *) pcp->base.psc;
 141
 142    return (gc != &dummyContext && psc) ? psc->driScreen : NULL;
 143 }
 144
 145 static void
 146 glx_dri3_flush_drawable(struct loader_dri3_drawable *draw, unsigned flags)
 147 {
 148    loader_dri3_flush(draw, flags, __DRI2_THROTTLE_SWAPBUFFER);
 149 }
 150
 151 static void
 152 glx_dri3_show_fps(struct loader_dri3_drawable *draw, uint64_t current_ust)
 153 {
 154    struct dri3_drawable *priv = loader_drawable_to_dri3_drawable(draw);
 155    const uint64_t interval =
 156       ((struct dri3_screen *) priv->base.psc)->show_fps_interval;
 157
 158    if (!interval)
 159       return;
 160
 161    priv->frames++;
 162
 163    /* DRI3+Present together uses microseconds for UST. */
 164    if (priv->previous_ust + interval * 1000000 <= current_ust) {
 165       if (priv->previous_ust) {
 166          fprintf(stderr, "libGL: FPS = %.1f\n",
 167                  ((uint64_t) priv->frames * 1000000) /
 168                  (double)(current_ust - priv->previous_ust));
 169       }
 170       priv->frames = 0;
 171       priv->previous_ust = current_ust;
 172    }
 173 }
 174
 175 static const struct loader_dri3_vtable glx_dri3_vtable = {
 176    .get_swap_interval = glx_dri3_get_swap_interval,
 177    .set_swap_interval = glx_dri3_set_swap_interval,
 178    .set_drawable_size = glx_dri3_set_drawable_size,
 179    .in_current_context = glx_dri3_in_current_context,
 180    .get_dri_context = glx_dri3_get_dri_context,
 181    .get_dri_screen = glx_dri3_get_dri_screen,
 182    .flush_drawable = glx_dri3_flush_drawable,
 183    .show_fps = glx_dri3_show_fps,
 184 };
 185
 186
 187 static const struct glx_context_vtable dri3_context_vtable;
 188
 189 static void
 190 dri3_destroy_context(struct glx_context *context)
 191 {
 192    struct dri3_context *pcp = (struct dri3_context *) context;
 193    struct dri3_screen *psc = (struct dri3_screen *) context->psc;
 194
 195    driReleaseDrawables(&pcp->base);
 196
 197    free((char *) context->extensions);
 198
 199    (*psc->core->destroyContext) (pcp->driContext);
 200
 201    free(pcp);
 202 }
 203
 204 static Bool
 205 dri3_bind_context(struct glx_context *context, struct glx_context *old,
 206                   GLXDrawable draw, GLXDrawable read)
 207 {
 208    struct dri3_context *pcp = (struct dri3_context *) context;
 209    struct dri3_screen *psc = (struct dri3_screen *) pcp->base.psc;
 210    struct dri3_drawable *pdraw, *pread;
 211    __DRIdrawable *dri_draw = NULL, *dri_read = NULL;
 212
 213    pdraw = (struct dri3_drawable *) driFetchDrawable(context, draw);
 214    pread = (struct dri3_drawable *) driFetchDrawable(context, read);
 215
 216    driReleaseDrawables(&pcp->base);
 217
 218    if (pdraw)
 219       dri_draw = pdraw->loader_drawable.dri_drawable;
 220    else if (draw != None)
 221       return GLXBadDrawable;
 222
 223    if (pread)
 224       dri_read = pread->loader_drawable.dri_drawable;
 225    else if (read != None)
 226       return GLXBadDrawable;
 227
 228    if (!(*psc->core->bindContext) (pcp->driContext, dri_draw, dri_read))
 229       return GLXBadContext;
 230
 231    if (dri_draw)
 232       (*psc->f->invalidate)(dri_draw);
 233    if (dri_read && dri_read != dri_draw)
 234       (*psc->f->invalidate)(dri_read);
 235
 236    return Success;
 237 }
 238
 239 static void
 240 dri3_unbind_context(struct glx_context *context, struct glx_context *new)
 241 {
 242    struct dri3_context *pcp = (struct dri3_context *) context;
 243    struct dri3_screen *psc = (struct dri3_screen *) pcp->base.psc;
 244
 245    (*psc->core->unbindContext) (pcp->driContext);
 246 }
 247
 248 static struct glx_context *
 249 dri3_create_context_attribs(struct glx_screen *base,
 250                             struct glx_config *config_base,
 251                             struct glx_context *shareList,
 252                             unsigned num_attribs,
 253                             const uint32_t *attribs,
 254                             unsigned *error)
 255 {
 256    struct dri3_context *pcp = NULL;
 257    struct dri3_context *pcp_shared = NULL;
 258    struct dri3_screen *psc = (struct dri3_screen *) base;
 259    __GLXDRIconfigPrivate *config = (__GLXDRIconfigPrivate *) config_base;
 260    __DRIcontext *shared = NULL;
 261
 262    uint32_t minor_ver = 1;
 263    uint32_t major_ver = 2;
 264    uint32_t flags = 0;
 265    unsigned api;
 266    int reset = __DRI_CTX_RESET_NO_NOTIFICATION;
 267    uint32_t ctx_attribs[2 * 5];
 268    unsigned num_ctx_attribs = 0;
 269    uint32_t render_type;
 270
 271    /* Remap the GLX tokens to DRI2 tokens.
 272     */
 273    if (!dri2_convert_glx_attribs(num_attribs, attribs,
 274                                  &major_ver, &minor_ver,
 275                                  &render_type, &flags, &api,
 276                                  &reset, error))
 277       goto error_exit;
 278
 279    /* Check the renderType value */
 280    if (!validate_renderType_against_config(config_base, render_type))
 281        goto error_exit;
 282
 283    if (shareList) {
 284       pcp_shared = (struct dri3_context *) shareList;
 285       shared = pcp_shared->driContext;
 286    }
 287
 288    pcp = calloc(1, sizeof *pcp);
 289    if (pcp == NULL) {
 290       *error = __DRI_CTX_ERROR_NO_MEMORY;
 291       goto error_exit;
 292    }
 293
 294    if (!glx_context_init(&pcp->base, &psc->base, &config->base))
 295       goto error_exit;
 296
 297    ctx_attribs[num_ctx_attribs++] = __DRI_CTX_ATTRIB_MAJOR_VERSION;
 298    ctx_attribs[num_ctx_attribs++] = major_ver;
 299    ctx_attribs[num_ctx_attribs++] = __DRI_CTX_ATTRIB_MINOR_VERSION;
 300    ctx_attribs[num_ctx_attribs++] = minor_ver;
 301
 302    /* Only send a value when the non-default value is requested.  By doing
 303     * this we don't have to check the driver's DRI3 version before sending the
 304     * default value.
 305     */
 306    if (reset != __DRI_CTX_RESET_NO_NOTIFICATION) {
 307       ctx_attribs[num_ctx_attribs++] = __DRI_CTX_ATTRIB_RESET_STRATEGY;
 308       ctx_attribs[num_ctx_attribs++] = reset;
 309    }
 310
 311    if (flags != 0) {
 312       ctx_attribs[num_ctx_attribs++] = __DRI_CTX_ATTRIB_FLAGS;
 313
 314       /* The current __DRI_CTX_FLAG_* values are identical to the
 315        * GLX_CONTEXT_*_BIT values.
 316        */
 317       ctx_attribs[num_ctx_attribs++] = flags;
 318    }
 319
 320    pcp->driContext =
 321       (*psc->image_driver->createContextAttribs) (psc->driScreen,
 322                                                   api,
 323                                                   config->driConfig,
 324                                                   shared,
 325                                                   num_ctx_attribs / 2,
 326                                                   ctx_attribs,
 327                                                   error,
 328                                                   pcp);
 329
 330    if (pcp->driContext == NULL)
 331       goto error_exit;
 332
 333    pcp->base.vtable = &dri3_context_vtable;
 334
 335    return &pcp->base;
 336
 337 error_exit:
 338    free(pcp);
 339
 340    return NULL;
 341 }
 342
 343 static struct glx_context *
 344 dri3_create_context(struct glx_screen *base,
 345                     struct glx_config *config_base,
 346                     struct glx_context *shareList, int renderType)
 347 {
 348    unsigned int error;
 349
 350    return dri3_create_context_attribs(base, config_base, shareList,
 351                                       0, NULL, &error);
 352 }
 353
 354 static void
 355 dri3_destroy_drawable(__GLXDRIdrawable *base)
 356 {
 357    struct dri3_drawable *pdraw = (struct dri3_drawable *) base;
 358
 359    loader_dri3_drawable_fini(&pdraw->loader_drawable);
 360
 361    free(pdraw);
 362 }
 363
 364 static __GLXDRIdrawable *
 365 dri3_create_drawable(struct glx_screen *base, XID xDrawable,
 366                      GLXDrawable drawable, struct glx_config *config_base)
 367 {
 368    struct dri3_drawable *pdraw;
 369    struct dri3_screen *psc = (struct dri3_screen *) base;
 370    __GLXDRIconfigPrivate *config = (__GLXDRIconfigPrivate *) config_base;
 371
 372    pdraw = calloc(1, sizeof(*pdraw));
 373    if (!pdraw)
 374       return NULL;
 375
 376    pdraw->base.destroyDrawable = dri3_destroy_drawable;
 377    pdraw->base.xDrawable = xDrawable;
 378    pdraw->base.drawable = drawable;
 379    pdraw->base.psc = &psc->base;
 380
 381    (void) __glXInitialize(psc->base.dpy);
 382
 383    if (loader_dri3_drawable_init(XGetXCBConnection(base->dpy),
 384                                  xDrawable, psc->driScreen,
 385                                  psc->is_different_gpu, config->driConfig,
 386                                  &psc->loader_dri3_ext, &glx_dri3_vtable,
 387                                  &pdraw->loader_drawable)) {
 388       free(pdraw);
 389       return NULL;
 390    }
 391
 392    return &pdraw->base;
 393 }
 394
 395 /** dri3_wait_for_msc
 396  *
 397  * Get the X server to send an event when the target msc/divisor/remainder is
 398  * reached.
 399  */
 400 static int
 401 dri3_wait_for_msc(__GLXDRIdrawable *pdraw, int64_t target_msc, int64_t divisor,
 402                   int64_t remainder, int64_t *ust, int64_t *msc, int64_t *sbc)
 403 {
 404    struct dri3_drawable *priv = (struct dri3_drawable *) pdraw;
 405
 406    loader_dri3_wait_for_msc(&priv->loader_drawable, target_msc, divisor,
 407                             remainder, ust, msc, sbc);
 408
 409    return 1;
 410 }
 411
 412 /** dri3_drawable_get_msc
 413  *
 414  * Return the current UST/MSC/SBC triplet by asking the server
 415  * for an event
 416  */
 417 static int
 418 dri3_drawable_get_msc(struct glx_screen *psc, __GLXDRIdrawable *pdraw,
 419                       int64_t *ust, int64_t *msc, int64_t *sbc)
 420 {
 421    return dri3_wait_for_msc(pdraw, 0, 0, 0, ust, msc,sbc);
 422 }
 423
 424 /** dri3_wait_for_sbc
 425  *
 426  * Wait for the completed swap buffer count to reach the specified
 427  * target. Presumably the application knows that this will be reached with
 428  * outstanding complete events, or we're going to be here awhile.
 429  */
 430 static int
 431 dri3_wait_for_sbc(__GLXDRIdrawable *pdraw, int64_t target_sbc, int64_t *ust,
 432                   int64_t *msc, int64_t *sbc)
 433 {
 434    struct dri3_drawable *priv = (struct dri3_drawable *) pdraw;
 435
 436    return loader_dri3_wait_for_sbc(&priv->loader_drawable, target_sbc,
 437                                    ust, msc, sbc);
 438 }
 439
 440 static void
 441 dri3_copy_sub_buffer(__GLXDRIdrawable *pdraw, int x, int y,
 442                      int width, int height,
 443                      Bool flush)
 444 {
 445    struct dri3_drawable *priv = (struct dri3_drawable *) pdraw;
 446
 447    loader_dri3_copy_sub_buffer(&priv->loader_drawable, x, y,
 448                                width, height, flush);
 449 }
 450
 451 static void
 452 dri3_wait_x(struct glx_context *gc)
 453 {
 454    struct dri3_drawable *priv = (struct dri3_drawable *)
 455       GetGLXDRIDrawable(gc->currentDpy, gc->currentDrawable);
 456
 457    if (priv)
 458       loader_dri3_wait_x(&priv->loader_drawable);
 459 }
 460
 461 static void
 462 dri3_wait_gl(struct glx_context *gc)
 463 {
 464    struct dri3_drawable *priv = (struct dri3_drawable *)
 465       GetGLXDRIDrawable(gc->currentDpy, gc->currentDrawable);
 466
 467    if (priv)
 468       loader_dri3_wait_gl(&priv->loader_drawable);
 469 }
 470
 471 /**
 472  * Called by the driver when it needs to update the real front buffer with the
 473  * contents of its fake front buffer.
 474  */
 475 static void
 476 dri3_flush_front_buffer(__DRIdrawable *driDrawable, void *loaderPrivate)
 477 {
 478    struct loader_dri3_drawable *draw = loaderPrivate;
 479    struct dri3_drawable *pdraw = loader_drawable_to_dri3_drawable(draw);
 480    struct dri3_screen *psc;
 481
 482    if (!pdraw)
 483       return;
 484
 485    if (!pdraw->base.psc)
 486       return;
 487
 488    psc = (struct dri3_screen *) pdraw->base.psc;
 489
 490    (void) __glXInitialize(psc->base.dpy);
 491
 492    loader_dri3_flush(draw, __DRI2_FLUSH_DRAWABLE, __DRI2_THROTTLE_FLUSHFRONT);
 493
 494    (*psc->f->invalidate)(driDrawable);
 495    loader_dri3_wait_gl(draw);
 496 }
 497
 498 static void
 499 dri_set_background_context(void *loaderPrivate)
 500 {
 501    struct dri3_context *pcp = (struct dri3_context *)loaderPrivate;
 502    __glXSetCurrentContext(&pcp->base);
 503 }
 504
 505 static GLboolean
 506 dri_is_thread_safe(void *loaderPrivate)
 507 {
 508    /* Unlike DRI2, DRI3 doesn't call GetBuffers/GetBuffersWithFormat
 509     * during draw so we're safe here.
 510     */
 511    return true;
 512 }
 513
 514 /* The image loader extension record for DRI3
 515  */
 516 static const __DRIimageLoaderExtension imageLoaderExtension = {
 517    .base = { __DRI_IMAGE_LOADER, 1 },
 518
 519    .getBuffers          = loader_dri3_get_buffers,
 520    .flushFrontBuffer    = dri3_flush_front_buffer,
 521 };
 522
 523 const __DRIuseInvalidateExtension dri3UseInvalidate = {
 524    .base = { __DRI_USE_INVALIDATE, 1 }
 525 };
 526
 527 static const __DRIbackgroundCallableExtension driBackgroundCallable = {
 528    .base = { __DRI_BACKGROUND_CALLABLE, 2 },
 529
 530    .setBackgroundContext = dri_set_background_context,
 531    .isThreadSafe         = dri_is_thread_safe,
 532 };
 533
 534 static const __DRIextension *loader_extensions[] = {
 535    &imageLoaderExtension.base,
 536    &dri3UseInvalidate.base,
 537    &driBackgroundCallable.base,
 538    NULL
 539 };
 540
 541 /** dri3_swap_buffers
 542  *
 543  * Make the current back buffer visible using the present extension
 544  */
 545 static int64_t
 546 dri3_swap_buffers(__GLXDRIdrawable *pdraw, int64_t target_msc, int64_t divisor,
 547                   int64_t remainder, Bool flush)
 548 {
 549    struct dri3_drawable *priv = (struct dri3_drawable *) pdraw;
 550    unsigned flags = __DRI2_FLUSH_DRAWABLE;
 551
 552    if (flush)
 553       flags |= __DRI2_FLUSH_CONTEXT;
 554
 555    return loader_dri3_swap_buffers_msc(&priv->loader_drawable,
 556                                        target_msc, divisor, remainder,
 557                                        flags, false);
 558 }
 559
 560 static int
 561 dri3_get_buffer_age(__GLXDRIdrawable *pdraw)
 562 {
 563    struct dri3_drawable *priv = (struct dri3_drawable *)pdraw;
 564
 565    return loader_dri3_query_buffer_age(&priv->loader_drawable);
 566 }
 567
 568 /** dri3_destroy_screen
 569  */
 570 static void
 571 dri3_destroy_screen(struct glx_screen *base)
 572 {
 573    struct dri3_screen *psc = (struct dri3_screen *) base;
 574
 575    /* Free the direct rendering per screen data */
 576    (*psc->core->destroyScreen) (psc->driScreen);
 577    driDestroyConfigs(psc->driver_configs);
 578    close(psc->fd);
 579    free(psc);
 580 }
 581
 582 /** dri3_set_swap_interval
 583  *
 584  * Record the application swap interval specification,
 585  */
 586 static int
 587 dri3_set_swap_interval(__GLXDRIdrawable *pdraw, int interval)
 588 {
 589    assert(pdraw != NULL);
 590
 591    struct dri3_drawable *priv =  (struct dri3_drawable *) pdraw;
 592    GLint vblank_mode = DRI_CONF_VBLANK_DEF_INTERVAL_1;
 593    struct dri3_screen *psc = (struct dri3_screen *) priv->base.psc;
 594
 595    if (psc->config)
 596       psc->config->configQueryi(psc->driScreen,
 597                                 "vblank_mode", &vblank_mode);
 598
 599    switch (vblank_mode) {
 600    case DRI_CONF_VBLANK_NEVER:
 601       if (interval != 0)
 602          return GLX_BAD_VALUE;
 603       break;
 604    case DRI_CONF_VBLANK_ALWAYS_SYNC:
 605       if (interval <= 0)
 606          return GLX_BAD_VALUE;
 607       break;
 608    default:
 609       break;
 610    }
 611
 612    loader_dri3_set_swap_interval(&priv->loader_drawable, interval);
 613
 614    return 0;
 615 }
 616
 617 /** dri3_get_swap_interval
 618  *
 619  * Return the stored swap interval
 620  */
 621 static int
 622 dri3_get_swap_interval(__GLXDRIdrawable *pdraw)
 623 {
 624    assert(pdraw != NULL);
 625
 626    struct dri3_drawable *priv =  (struct dri3_drawable *) pdraw;
 627
 628   return priv->swap_interval;
 629 }
 630
 631 static void
 632 dri3_bind_tex_image(Display * dpy,
 633                     GLXDrawable drawable,
 634                     int buffer, const int *attrib_list)
 635 {
 636    struct glx_context *gc = __glXGetCurrentContext();
 637    struct dri3_context *pcp = (struct dri3_context *) gc;
 638    __GLXDRIdrawable *base = GetGLXDRIDrawable(dpy, drawable);
 639    struct dri3_drawable *pdraw = (struct dri3_drawable *) base;
 640    struct dri3_screen *psc;
 641
 642    if (pdraw != NULL) {
 643       psc = (struct dri3_screen *) base->psc;
 644
 645       (*psc->f->invalidate)(pdraw->loader_drawable.dri_drawable);
 646
 647       XSync(dpy, false);
 648
 649       (*psc->texBuffer->setTexBuffer2) (pcp->driContext,
 650                                         pdraw->base.textureTarget,
 651                                         pdraw->base.textureFormat,
 652                                         pdraw->loader_drawable.dri_drawable);
 653    }
 654 }
 655
 656 static void
 657 dri3_release_tex_image(Display * dpy, GLXDrawable drawable, int buffer)
 658 {
 659    struct glx_context *gc = __glXGetCurrentContext();
 660    struct dri3_context *pcp = (struct dri3_context *) gc;
 661    __GLXDRIdrawable *base = GetGLXDRIDrawable(dpy, drawable);
 662    struct dri3_drawable *pdraw = (struct dri3_drawable *) base;
 663    struct dri3_screen *psc;
 664
 665    if (pdraw != NULL) {
 666       psc = (struct dri3_screen *) base->psc;
 667
 668       if (psc->texBuffer->base.version >= 3 &&
 669           psc->texBuffer->releaseTexBuffer != NULL)
 670          (*psc->texBuffer->releaseTexBuffer) (pcp->driContext,
 671                                               pdraw->base.textureTarget,
 672                                               pdraw->loader_drawable.dri_drawable);
 673    }
 674 }
 675
 676 static const struct glx_context_vtable dri3_context_vtable = {
 677    .destroy             = dri3_destroy_context,
 678    .bind                = dri3_bind_context,
 679    .unbind              = dri3_unbind_context,
 680    .wait_gl             = dri3_wait_gl,
 681    .wait_x              = dri3_wait_x,
 682    .use_x_font          = DRI_glXUseXFont,
 683    .bind_tex_image      = dri3_bind_tex_image,
 684    .release_tex_image   = dri3_release_tex_image,
 685    .get_proc_address    = NULL,
 686    .interop_query_device_info = dri3_interop_query_device_info,
 687    .interop_export_object = dri3_interop_export_object
 688 };
 689
 690 /** dri3_bind_extensions
 691  *
 692  * Enable all of the extensions supported on DRI3
 693  */
 694 static void
 695 dri3_bind_extensions(struct dri3_screen *psc, struct glx_display * priv,
 696                      const char *driverName)
 697 {
 698    const __DRIextension **extensions;
 699    unsigned mask;
 700    int i;
 701
 702    extensions = psc->core->getExtensions(psc->driScreen);
 703
 704    __glXEnableDirectExtension(&psc->base, "GLX_SGI_video_sync");
 705    __glXEnableDirectExtension(&psc->base, "GLX_SGI_swap_control");
 706    __glXEnableDirectExtension(&psc->base, "GLX_MESA_swap_control");
 707    __glXEnableDirectExtension(&psc->base, "GLX_SGI_make_current_read");
 708    __glXEnableDirectExtension(&psc->base, "GLX_INTEL_swap_event");
 709
 710    mask = psc->image_driver->getAPIMask(psc->driScreen);
 711
 712    __glXEnableDirectExtension(&psc->base, "GLX_ARB_create_context");
 713    __glXEnableDirectExtension(&psc->base, "GLX_ARB_create_context_profile");
 714
 715    if ((mask & ((1 << __DRI_API_GLES) |
 716                 (1 << __DRI_API_GLES2) |
 717                 (1 << __DRI_API_GLES3))) != 0) {
 718       __glXEnableDirectExtension(&psc->base,
 719                                  "GLX_EXT_create_context_es_profile");
 720       __glXEnableDirectExtension(&psc->base,
 721                                  "GLX_EXT_create_context_es2_profile");
 722    }
 723
 724    for (i = 0; extensions[i]; i++) {
 725       /* when on a different gpu than the server, the server pixmaps
 726        * can have a tiling mode we can't read. Thus we can't create
 727        * a texture from them.
 728        */
 729       if (!psc->is_different_gpu &&
 730          (strcmp(extensions[i]->name, __DRI_TEX_BUFFER) == 0)) {
 731          psc->texBuffer = (__DRItexBufferExtension *) extensions[i];
 732          __glXEnableDirectExtension(&psc->base, "GLX_EXT_texture_from_pixmap");
 733       }
 734
 735       if ((strcmp(extensions[i]->name, __DRI2_FLUSH) == 0)) {
 736          psc->f = (__DRI2flushExtension *) extensions[i];
 737          /* internal driver extension, no GL extension exposed */
 738       }
 739
 740       if (strcmp(extensions[i]->name, __DRI_IMAGE) == 0)
 741          psc->image = (__DRIimageExtension *) extensions[i];
 742
 743       if ((strcmp(extensions[i]->name, __DRI2_CONFIG_QUERY) == 0))
 744          psc->config = (__DRI2configQueryExtension *) extensions[i];
 745
 746       if (strcmp(extensions[i]->name, __DRI2_ROBUSTNESS) == 0)
 747          __glXEnableDirectExtension(&psc->base,
 748                                     "GLX_ARB_create_context_robustness");
 749
 750       if (strcmp(extensions[i]->name, __DRI2_RENDERER_QUERY) == 0) {
 751          psc->rendererQuery = (__DRI2rendererQueryExtension *) extensions[i];
 752          __glXEnableDirectExtension(&psc->base, "GLX_MESA_query_renderer");
 753       }
 754
 755       if (strcmp(extensions[i]->name, __DRI2_INTEROP) == 0)
 756          psc->interop = (__DRI2interopExtension*)extensions[i];
 757    }
 758 }
 759
 760 static const struct glx_screen_vtable dri3_screen_vtable = {
 761    .create_context         = dri3_create_context,
 762    .create_context_attribs = dri3_create_context_attribs,
 763    .query_renderer_integer = dri3_query_renderer_integer,
 764    .query_renderer_string  = dri3_query_renderer_string,
 765 };
 766
 767 /** dri3_create_screen
 768  *
 769  * Initialize DRI3 on the specified screen.
 770  *
 771  * Opens the DRI device, locates the appropriate DRI driver
 772  * and loads that.
 773  *
 774  * Checks to see if the driver supports the necessary extensions
 775  *
 776  * Initializes the driver for the screen and sets up our structures
 777  */
 778
 779 static struct glx_screen *
 780 dri3_create_screen(int screen, struct glx_display * priv)
 781 {
 782    xcb_connection_t *c = XGetXCBConnection(priv->dpy);
 783    const __DRIconfig **driver_configs;
 784    const __DRIextension **extensions;
 785    const struct dri3_display *const pdp = (struct dri3_display *)
 786       priv->dri3Display;
 787    struct dri3_screen *psc;
 788    __GLXDRIscreen *psp;
 789    struct glx_config *configs = NULL, *visuals = NULL;
 790    char *driverName, *deviceName, *tmp;
 791    int i;
 792    unsigned char disable;
 793
 794    psc = calloc(1, sizeof *psc);
 795    if (psc == NULL)
 796       return NULL;
 797
 798    psc->fd = -1;
 799
 800    if (!glx_screen_init(&psc->base, screen, priv)) {
 801       free(psc);
 802       return NULL;
 803    }
 804
 805    psc->fd = loader_dri3_open(c, RootWindow(priv->dpy, screen), None);
 806    if (psc->fd < 0) {
 807       int conn_error = xcb_connection_has_error(c);
 808
 809       glx_screen_cleanup(&psc->base);
 810       free(psc);
 811       InfoMessageF("screen %d does not appear to be DRI3 capable\n", screen);
 812
 813       if (conn_error)
 814          ErrorMessageF("Connection closed during DRI3 initialization failure");
 815
 816       return NULL;
 817    }
 818
 819    psc->fd = loader_get_user_preferred_fd(psc->fd, &psc->is_different_gpu);
 820    deviceName = NULL;
 821
 822    driverName = loader_get_driver_for_fd(psc->fd);
 823    if (!driverName) {
 824       ErrorMessageF("No driver found\n");
 825       goto handle_error;
 826    }
 827
 828    psc->driver = driOpenDriver(driverName);
 829    if (psc->driver == NULL) {
 830       ErrorMessageF("driver pointer missing\n");
 831       goto handle_error;
 832    }
 833
 834    extensions = driGetDriverExtensions(psc->driver, driverName);
 835    if (extensions == NULL)
 836       goto handle_error;
 837
 838    for (i = 0; extensions[i]; i++) {
 839       if (strcmp(extensions[i]->name, __DRI_CORE) == 0)
 840          psc->core = (__DRIcoreExtension *) extensions[i];
 841       if (strcmp(extensions[i]->name, __DRI_IMAGE_DRIVER) == 0)
 842          psc->image_driver = (__DRIimageDriverExtension *) extensions[i];
 843    }
 844
 845
 846    if (psc->core == NULL) {
 847       ErrorMessageF("core dri driver extension not found\n");
 848       goto handle_error;
 849    }
 850
 851    if (psc->image_driver == NULL) {
 852       ErrorMessageF("image driver extension not found\n");
 853       goto handle_error;
 854    }
 855
 856    psc->driScreen =
 857       psc->image_driver->createNewScreen2(screen, psc->fd,
 858                                           pdp->loader_extensions,
 859                                           extensions,
 860                                           &driver_configs, psc);
 861
 862    if (psc->driScreen == NULL) {
 863       ErrorMessageF("failed to create dri screen\n");
 864       goto handle_error;
 865    }
 866
 867    dri3_bind_extensions(psc, priv, driverName);
 868
 869    if (!psc->image || psc->image->base.version < 7 || !psc->image->createImageFromFds) {
 870       ErrorMessageF("Version 7 or imageFromFds image extension not found\n");
 871       goto handle_error;
 872    }
 873
 874    if (!psc->f || psc->f->base.version < 4) {
 875       ErrorMessageF("Version 4 or later of flush extension not found\n");
 876       goto handle_error;
 877    }
 878
 879    if (psc->is_different_gpu && psc->image->base.version < 9) {
 880       ErrorMessageF("Different GPU, but image extension version 9 or later not found\n");
 881       goto handle_error;
 882    }
 883
 884    if (psc->is_different_gpu && !psc->image->blitImage) {
 885       ErrorMessageF("Different GPU, but blitImage not implemented for this driver\n");
 886       goto handle_error;
 887    }
 888
 889    if (!psc->is_different_gpu && (
 890        !psc->texBuffer || psc->texBuffer->base.version < 2 ||
 891        !psc->texBuffer->setTexBuffer2
 892        )) {
 893       ErrorMessageF("Version 2 or later of texBuffer extension not found\n");
 894       goto handle_error;
 895    }
 896
 897    psc->loader_dri3_ext.core = psc->core;
 898    psc->loader_dri3_ext.image_driver = psc->image_driver;
 899    psc->loader_dri3_ext.flush = psc->f;
 900    psc->loader_dri3_ext.tex_buffer = psc->texBuffer;
 901    psc->loader_dri3_ext.image = psc->image;
 902    psc->loader_dri3_ext.config = psc->config;
 903
 904    configs = driConvertConfigs(psc->core, psc->base.configs, driver_configs);
 905    visuals = driConvertConfigs(psc->core, psc->base.visuals, driver_configs);
 906
 907    if (!configs || !visuals) {
 908        ErrorMessageF("No matching fbConfigs or visuals found\n");
 909        goto handle_error;
 910    }
 911
 912    glx_config_destroy_list(psc->base.configs);
 913    psc->base.configs = configs;
 914    glx_config_destroy_list(psc->base.visuals);
 915    psc->base.visuals = visuals;
 916
 917    psc->driver_configs = driver_configs;
 918
 919    psc->base.vtable = &dri3_screen_vtable;
 920    psp = &psc->vtable;
 921    psc->base.driScreen = psp;
 922    psp->destroyScreen = dri3_destroy_screen;
 923    psp->createDrawable = dri3_create_drawable;
 924    psp->swapBuffers = dri3_swap_buffers;
 925
 926    psp->getDrawableMSC = dri3_drawable_get_msc;
 927    psp->waitForMSC = dri3_wait_for_msc;
 928    psp->waitForSBC = dri3_wait_for_sbc;
 929    psp->setSwapInterval = dri3_set_swap_interval;
 930    psp->getSwapInterval = dri3_get_swap_interval;
 931    if (psc->config->configQueryb(psc->driScreen,
 932                                  "glx_disable_oml_sync_control",
 933                                  &disable) || !disable)
 934       __glXEnableDirectExtension(&psc->base, "GLX_OML_sync_control");
 935
 936    psp->copySubBuffer = dri3_copy_sub_buffer;
 937    __glXEnableDirectExtension(&psc->base, "GLX_MESA_copy_sub_buffer");
 938
 939    psp->getBufferAge = dri3_get_buffer_age;
 940    if (psc->config->configQueryb(psc->driScreen,
 941                                  "glx_disable_ext_buffer_age",
 942                                  &disable) || !disable)
 943       __glXEnableDirectExtension(&psc->base, "GLX_EXT_buffer_age");
 944
 945    free(driverName);
 946    free(deviceName);
 947
 948    tmp = getenv("LIBGL_SHOW_FPS");
 949    psc->show_fps_interval = tmp ? atoi(tmp) : 0;
 950    if (psc->show_fps_interval < 0)
 951       psc->show_fps_interval = 0;
 952
 953    InfoMessageF("Using DRI3 for screen %d\n", screen);
 954
 955    return &psc->base;
 956
 957 handle_error:
 958    CriticalErrorMessageF("failed to load driver: %s\n", driverName);
 959
 960    if (configs)
 961        glx_config_destroy_list(configs);
 962    if (visuals)
 963        glx_config_destroy_list(visuals);
 964    if (psc->driScreen)
 965        psc->core->destroyScreen(psc->driScreen);
 966    psc->driScreen = NULL;
 967    if (psc->fd >= 0)
 968       close(psc->fd);
 969    if (psc->driver)
 970       dlclose(psc->driver);
 971
 972    free(driverName);
 973    free(deviceName);
 974    glx_screen_cleanup(&psc->base);
 975    free(psc);
 976
 977    return NULL;
 978 }
 979
 980 /** dri_destroy_display
 981  *
 982  * Called from __glXFreeDisplayPrivate.
 983  */
 984 static void
 985 dri3_destroy_display(__GLXDRIdisplay * dpy)
 986 {
 987    free(dpy);
 988 }
 989
 990 /** dri3_create_display
 991  *
 992  * Allocate, initialize and return a __DRIdisplayPrivate object.
 993  * This is called from __glXInitialize() when we are given a new
 994  * display pointer. This is public to that function, but hidden from
 995  * outside of libGL.
 996  */
 997 _X_HIDDEN __GLXDRIdisplay *
 998 dri3_create_display(Display * dpy)
 999 {
1000    struct dri3_display                  *pdp;
1001    xcb_connection_t                     *c = XGetXCBConnection(dpy);
1002    xcb_dri3_query_version_cookie_t      dri3_cookie;
1003    xcb_dri3_query_version_reply_t       *dri3_reply;
1004    xcb_present_query_version_cookie_t   present_cookie;
1005    xcb_present_query_version_reply_t    *present_reply;
1006    xcb_generic_error_t                  *error;
1007    const xcb_query_extension_reply_t    *extension;
1008
1009    xcb_prefetch_extension_data(c, &xcb_dri3_id);
1010    xcb_prefetch_extension_data(c, &xcb_present_id);
1011
1012    extension = xcb_get_extension_data(c, &xcb_dri3_id);
1013    if (!(extension && extension->present))
1014       return NULL;
1015
1016    extension = xcb_get_extension_data(c, &xcb_present_id);
1017    if (!(extension && extension->present))
1018       return NULL;
1019
1020    dri3_cookie = xcb_dri3_query_version(c,
1021                                         XCB_DRI3_MAJOR_VERSION,
1022                                         XCB_DRI3_MINOR_VERSION);
1023
1024
1025    present_cookie = xcb_present_query_version(c,
1026                                    XCB_PRESENT_MAJOR_VERSION,
1027                                    XCB_PRESENT_MINOR_VERSION);
1028
1029    pdp = malloc(sizeof *pdp);
1030    if (pdp == NULL)
1031       return NULL;
1032
1033    dri3_reply = xcb_dri3_query_version_reply(c, dri3_cookie, &error);
1034    if (!dri3_reply) {
1035       free(error);
1036       goto no_extension;
1037    }
1038
1039    pdp->dri3Major = dri3_reply->major_version;
1040    pdp->dri3Minor = dri3_reply->minor_version;
1041    free(dri3_reply);
1042
1043    present_reply = xcb_present_query_version_reply(c, present_cookie, &error);
1044    if (!present_reply) {
1045       free(error);
1046       goto no_extension;
1047    }
1048    pdp->presentMajor = present_reply->major_version;
1049    pdp->presentMinor = present_reply->minor_version;
1050    free(present_reply);
1051
1052    pdp->base.destroyDisplay = dri3_destroy_display;
1053    pdp->base.createScreen = dri3_create_screen;
1054
1055    loader_set_logger(dri_message);
1056
1057    pdp->loader_extensions = loader_extensions;
1058
1059    return &pdp->base;
1060 no_extension:
1061    free(pdp);
1062    return NULL;
1063 }
1064
1065 #endif /* GLX_DIRECT_RENDERING */