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    uint32_t ctx_attribs[2 * 5];
 239    unsigned num_ctx_attribs = 0;
 240    uint32_t render_type;
 241
 242    /* Remap the GLX tokens to DRI2 tokens.
 243     */
 244    if (!dri2_convert_glx_attribs(num_attribs, attribs,
 245                                  &major_ver, &minor_ver,
 246                                  &render_type, &flags, &api,
 247                                  &reset, error))
 248       goto error_exit;
 249
 250    /* Check the renderType value */
 251    if (!validate_renderType_against_config(config_base, render_type))
 252        goto error_exit;
 253
 254    if (shareList) {
 255       pcp_shared = (struct dri3_context *) shareList;
 256       shared = pcp_shared->driContext;
 257    }
 258
 259    pcp = calloc(1, sizeof *pcp);
 260    if (pcp == NULL) {
 261       *error = __DRI_CTX_ERROR_NO_MEMORY;
 262       goto error_exit;
 263    }
 264
 265    if (!glx_context_init(&pcp->base, &psc->base, &config->base))
 266       goto error_exit;
 267
 268    ctx_attribs[num_ctx_attribs++] = __DRI_CTX_ATTRIB_MAJOR_VERSION;
 269    ctx_attribs[num_ctx_attribs++] = major_ver;
 270    ctx_attribs[num_ctx_attribs++] = __DRI_CTX_ATTRIB_MINOR_VERSION;
 271    ctx_attribs[num_ctx_attribs++] = minor_ver;
 272
 273    /* Only send a value when the non-default value is requested.  By doing
 274     * this we don't have to check the driver's DRI3 version before sending the
 275     * default value.
 276     */
 277    if (reset != __DRI_CTX_RESET_NO_NOTIFICATION) {
 278       ctx_attribs[num_ctx_attribs++] = __DRI_CTX_ATTRIB_RESET_STRATEGY;
 279       ctx_attribs[num_ctx_attribs++] = reset;
 280    }
 281
 282    if (flags != 0) {
 283       ctx_attribs[num_ctx_attribs++] = __DRI_CTX_ATTRIB_FLAGS;
 284
 285       /* The current __DRI_CTX_FLAG_* values are identical to the
 286        * GLX_CONTEXT_*_BIT values.
 287        */
 288       ctx_attribs[num_ctx_attribs++] = flags;
 289    }
 290
 291    pcp->driContext =
 292       (*psc->image_driver->createContextAttribs) (psc->driScreen,
 293                                                   api,
 294                                                   config->driConfig,
 295                                                   shared,
 296                                                   num_ctx_attribs / 2,
 297                                                   ctx_attribs,
 298                                                   error,
 299                                                   pcp);
 300
 301    if (pcp->driContext == NULL)
 302       goto error_exit;
 303
 304    pcp->base.vtable = &dri3_context_vtable;
 305
 306    return &pcp->base;
 307
 308 error_exit:
 309    free(pcp);
 310
 311    return NULL;
 312 }
 313
 314 static struct glx_context *
 315 dri3_create_context(struct glx_screen *base,
 316                     struct glx_config *config_base,
 317                     struct glx_context *shareList, int renderType)
 318 {
 319    unsigned int error;
 320
 321    return dri3_create_context_attribs(base, config_base, shareList,
 322                                       0, NULL, &error);
 323 }
 324
 325 static void
 326 dri3_destroy_drawable(__GLXDRIdrawable *base)
 327 {
 328    struct dri3_drawable *pdraw = (struct dri3_drawable *) base;
 329
 330    loader_dri3_drawable_fini(&pdraw->loader_drawable);
 331
 332    free(pdraw);
 333 }
 334
 335 static __GLXDRIdrawable *
 336 dri3_create_drawable(struct glx_screen *base, XID xDrawable,
 337                      GLXDrawable drawable, struct glx_config *config_base)
 338 {
 339    struct dri3_drawable *pdraw;
 340    struct dri3_screen *psc = (struct dri3_screen *) base;
 341    __GLXDRIconfigPrivate *config = (__GLXDRIconfigPrivate *) config_base;
 342
 343    pdraw = calloc(1, sizeof(*pdraw));
 344    if (!pdraw)
 345       return NULL;
 346
 347    pdraw->base.destroyDrawable = dri3_destroy_drawable;
 348    pdraw->base.xDrawable = xDrawable;
 349    pdraw->base.drawable = drawable;
 350    pdraw->base.psc = &psc->base;
 351
 352    (void) __glXInitialize(psc->base.dpy);
 353
 354    if (loader_dri3_drawable_init(XGetXCBConnection(base->dpy),
 355                                  xDrawable, psc->driScreen,
 356                                  psc->is_different_gpu, config->driConfig,
 357                                  &psc->loader_dri3_ext, &glx_dri3_vtable,
 358                                  &pdraw->loader_drawable)) {
 359       free(pdraw);
 360       return NULL;
 361    }
 362
 363    return &pdraw->base;
 364 }
 365
 366 /** dri3_wait_for_msc
 367  *
 368  * Get the X server to send an event when the target msc/divisor/remainder is
 369  * reached.
 370  */
 371 static int
 372 dri3_wait_for_msc(__GLXDRIdrawable *pdraw, int64_t target_msc, int64_t divisor,
 373                   int64_t remainder, int64_t *ust, int64_t *msc, int64_t *sbc)
 374 {
 375    struct dri3_drawable *priv = (struct dri3_drawable *) pdraw;
 376
 377    loader_dri3_wait_for_msc(&priv->loader_drawable, target_msc, divisor,
 378                             remainder, ust, msc, sbc);
 379
 380    return 1;
 381 }
 382
 383 /** dri3_drawable_get_msc
 384  *
 385  * Return the current UST/MSC/SBC triplet by asking the server
 386  * for an event
 387  */
 388 static int
 389 dri3_drawable_get_msc(struct glx_screen *psc, __GLXDRIdrawable *pdraw,
 390                       int64_t *ust, int64_t *msc, int64_t *sbc)
 391 {
 392    return dri3_wait_for_msc(pdraw, 0, 0, 0, ust, msc,sbc);
 393 }
 394
 395 /** dri3_wait_for_sbc
 396  *
 397  * Wait for the completed swap buffer count to reach the specified
 398  * target. Presumably the application knows that this will be reached with
 399  * outstanding complete events, or we're going to be here awhile.
 400  */
 401 static int
 402 dri3_wait_for_sbc(__GLXDRIdrawable *pdraw, int64_t target_sbc, int64_t *ust,
 403                   int64_t *msc, int64_t *sbc)
 404 {
 405    struct dri3_drawable *priv = (struct dri3_drawable *) pdraw;
 406
 407    return loader_dri3_wait_for_sbc(&priv->loader_drawable, target_sbc,
 408                                    ust, msc, sbc);
 409 }
 410
 411 static void
 412 dri3_copy_sub_buffer(__GLXDRIdrawable *pdraw, int x, int y,
 413                      int width, int height,
 414                      Bool flush)
 415 {
 416    struct dri3_drawable *priv = (struct dri3_drawable *) pdraw;
 417
 418    loader_dri3_copy_sub_buffer(&priv->loader_drawable, x, y,
 419                                width, height, flush);
 420 }
 421
 422 static void
 423 dri3_wait_x(struct glx_context *gc)
 424 {
 425    struct dri3_drawable *priv = (struct dri3_drawable *)
 426       GetGLXDRIDrawable(gc->currentDpy, gc->currentDrawable);
 427
 428    if (priv)
 429       loader_dri3_wait_x(&priv->loader_drawable);
 430 }
 431
 432 static void
 433 dri3_wait_gl(struct glx_context *gc)
 434 {
 435    struct dri3_drawable *priv = (struct dri3_drawable *)
 436       GetGLXDRIDrawable(gc->currentDpy, gc->currentDrawable);
 437
 438    if (priv)
 439       loader_dri3_wait_gl(&priv->loader_drawable);
 440 }
 441
 442 /**
 443  * Called by the driver when it needs to update the real front buffer with the
 444  * contents of its fake front buffer.
 445  */
 446 static void
 447 dri3_flush_front_buffer(__DRIdrawable *driDrawable, void *loaderPrivate)
 448 {
 449    struct loader_dri3_drawable *draw = loaderPrivate;
 450    struct dri3_drawable *pdraw = loader_drawable_to_dri3_drawable(draw);
 451    struct dri3_screen *psc;
 452
 453    if (!pdraw)
 454       return;
 455
 456    if (!pdraw->base.psc)
 457       return;
 458
 459    psc = (struct dri3_screen *) pdraw->base.psc;
 460
 461    (void) __glXInitialize(psc->base.dpy);
 462
 463    loader_dri3_flush(draw, __DRI2_FLUSH_DRAWABLE, __DRI2_THROTTLE_FLUSHFRONT);
 464
 465    (*psc->f->invalidate)(driDrawable);
 466    loader_dri3_wait_gl(draw);
 467 }
 468
 469 /**
 470  * Make sure all pending swapbuffers have been submitted to hardware
 471  *
 472  * \param driDrawable[in]  Pointer to the dri drawable whose swaps we are
 473  * flushing.
 474  * \param loaderPrivate[in]  Pointer to the corresponding struct
 475  * loader_dri_drawable.
 476  */
 477 static void
 478 dri3_flush_swap_buffers(__DRIdrawable *driDrawable, void *loaderPrivate)
 479 {
 480    struct loader_dri3_drawable *draw = loaderPrivate;
 481    struct dri3_drawable *pdraw = loader_drawable_to_dri3_drawable(draw);
 482    struct dri3_screen *psc;
 483
 484    if (!pdraw)
 485       return;
 486
 487    if (!pdraw->base.psc)
 488       return;
 489
 490    psc = (struct dri3_screen *) pdraw->base.psc;
 491
 492    (void) __glXInitialize(psc->base.dpy);
 493    loader_dri3_swapbuffer_barrier(draw);
 494 }
 495
 496 static void
 497 dri_set_background_context(void *loaderPrivate)
 498 {
 499    struct dri3_context *pcp = (struct dri3_context *)loaderPrivate;
 500    __glXSetCurrentContext(&pcp->base);
 501 }
 502
 503 static GLboolean
 504 dri_is_thread_safe(void *loaderPrivate)
 505 {
 506    /* Unlike DRI2, DRI3 doesn't call GetBuffers/GetBuffersWithFormat
 507     * during draw so we're safe here.
 508     */
 509    return true;
 510 }
 511
 512 /* The image loader extension record for DRI3
 513  */
 514 static const __DRIimageLoaderExtension imageLoaderExtension = {
 515    .base = { __DRI_IMAGE_LOADER, 3 },
 516
 517    .getBuffers          = loader_dri3_get_buffers,
 518    .flushFrontBuffer    = dri3_flush_front_buffer,
 519    .flushSwapBuffers    = dri3_flush_swap_buffers,
 520 };
 521
 522 const __DRIuseInvalidateExtension dri3UseInvalidate = {
 523    .base = { __DRI_USE_INVALIDATE, 1 }
 524 };
 525
 526 static const __DRIbackgroundCallableExtension driBackgroundCallable = {
 527    .base = { __DRI_BACKGROUND_CALLABLE, 2 },
 528
 529    .setBackgroundContext = dri_set_background_context,
 530    .isThreadSafe         = dri_is_thread_safe,
 531 };
 532
 533 static const __DRIextension *loader_extensions[] = {
 534    &imageLoaderExtension.base,
 535    &dri3UseInvalidate.base,
 536    &driBackgroundCallable.base,
 537    NULL
 538 };
 539
 540 /** dri3_swap_buffers
 541  *
 542  * Make the current back buffer visible using the present extension
 543  */
 544 static int64_t
 545 dri3_swap_buffers(__GLXDRIdrawable *pdraw, int64_t target_msc, int64_t divisor,
 546                   int64_t remainder, Bool flush)
 547 {
 548    struct dri3_drawable *priv = (struct dri3_drawable *) pdraw;
 549    unsigned flags = __DRI2_FLUSH_DRAWABLE;
 550
 551    if (flush)
 552       flags |= __DRI2_FLUSH_CONTEXT;
 553
 554    return loader_dri3_swap_buffers_msc(&priv->loader_drawable,
 555                                        target_msc, divisor, remainder,
 556                                        flags, false);
 557 }
 558
 559 static int
 560 dri3_get_buffer_age(__GLXDRIdrawable *pdraw)
 561 {
 562    struct dri3_drawable *priv = (struct dri3_drawable *)pdraw;
 563
 564    return loader_dri3_query_buffer_age(&priv->loader_drawable);
 565 }
 566
 567 /** dri3_destroy_screen
 568  */
 569 static void
 570 dri3_destroy_screen(struct glx_screen *base)
 571 {
 572    struct dri3_screen *psc = (struct dri3_screen *) base;
 573
 574    /* Free the direct rendering per screen data */
 575    loader_dri3_close_screen(psc->driScreen);
 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    priv->swap_interval = interval;
 613    loader_dri3_set_swap_interval(&priv->loader_drawable, interval);
 614
 615    return 0;
 616 }
 617
 618 /** dri3_get_swap_interval
 619  *
 620  * Return the stored swap interval
 621  */
 622 static int
 623 dri3_get_swap_interval(__GLXDRIdrawable *pdraw)
 624 {
 625    assert(pdraw != NULL);
 626
 627    struct dri3_drawable *priv =  (struct dri3_drawable *) pdraw;
 628
 629   return priv->swap_interval;
 630 }
 631
 632 static void
 633 dri3_bind_tex_image(Display * dpy,
 634                     GLXDrawable drawable,
 635                     int buffer, const int *attrib_list)
 636 {
 637    struct glx_context *gc = __glXGetCurrentContext();
 638    struct dri3_context *pcp = (struct dri3_context *) gc;
 639    __GLXDRIdrawable *base = GetGLXDRIDrawable(dpy, drawable);
 640    struct dri3_drawable *pdraw = (struct dri3_drawable *) base;
 641    struct dri3_screen *psc;
 642
 643    if (pdraw != NULL) {
 644       psc = (struct dri3_screen *) base->psc;
 645
 646       (*psc->f->invalidate)(pdraw->loader_drawable.dri_drawable);
 647
 648       XSync(dpy, false);
 649
 650       (*psc->texBuffer->setTexBuffer2) (pcp->driContext,
 651                                         pdraw->base.textureTarget,
 652                                         pdraw->base.textureFormat,
 653                                         pdraw->loader_drawable.dri_drawable);
 654    }
 655 }
 656
 657 static void
 658 dri3_release_tex_image(Display * dpy, GLXDrawable drawable, int buffer)
 659 {
 660    struct glx_context *gc = __glXGetCurrentContext();
 661    struct dri3_context *pcp = (struct dri3_context *) gc;
 662    __GLXDRIdrawable *base = GetGLXDRIDrawable(dpy, drawable);
 663    struct dri3_drawable *pdraw = (struct dri3_drawable *) base;
 664    struct dri3_screen *psc;
 665
 666    if (pdraw != NULL) {
 667       psc = (struct dri3_screen *) base->psc;
 668
 669       if (psc->texBuffer->base.version >= 3 &&
 670           psc->texBuffer->releaseTexBuffer != NULL)
 671          (*psc->texBuffer->releaseTexBuffer) (pcp->driContext,
 672                                               pdraw->base.textureTarget,
 673                                               pdraw->loader_drawable.dri_drawable);
 674    }
 675 }
 676
 677 static const struct glx_context_vtable dri3_context_vtable = {
 678    .destroy             = dri3_destroy_context,
 679    .bind                = dri3_bind_context,
 680    .unbind              = dri3_unbind_context,
 681    .wait_gl             = dri3_wait_gl,
 682    .wait_x              = dri3_wait_x,
 683    .use_x_font          = DRI_glXUseXFont,
 684    .bind_tex_image      = dri3_bind_tex_image,
 685    .release_tex_image   = dri3_release_tex_image,
 686    .get_proc_address    = NULL,
 687    .interop_query_device_info = dri3_interop_query_device_info,
 688    .interop_export_object = dri3_interop_export_object
 689 };
 690
 691 /** dri3_bind_extensions
 692  *
 693  * Enable all of the extensions supported on DRI3
 694  */
 695 static void
 696 dri3_bind_extensions(struct dri3_screen *psc, struct glx_display * priv,
 697                      const char *driverName)
 698 {
 699    const __DRIextension **extensions;
 700    unsigned mask;
 701    int i;
 702
 703    extensions = psc->core->getExtensions(psc->driScreen);
 704
 705    __glXEnableDirectExtension(&psc->base, "GLX_SGI_video_sync");
 706    __glXEnableDirectExtension(&psc->base, "GLX_SGI_swap_control");
 707    __glXEnableDirectExtension(&psc->base, "GLX_MESA_swap_control");
 708    __glXEnableDirectExtension(&psc->base, "GLX_SGI_make_current_read");
 709    __glXEnableDirectExtension(&psc->base, "GLX_INTEL_swap_event");
 710
 711    mask = psc->image_driver->getAPIMask(psc->driScreen);
 712
 713    __glXEnableDirectExtension(&psc->base, "GLX_ARB_create_context");
 714    __glXEnableDirectExtension(&psc->base, "GLX_ARB_create_context_profile");
 715
 716    if ((mask & ((1 << __DRI_API_GLES) |
 717                 (1 << __DRI_API_GLES2) |
 718                 (1 << __DRI_API_GLES3))) != 0) {
 719       __glXEnableDirectExtension(&psc->base,
 720                                  "GLX_EXT_create_context_es_profile");
 721       __glXEnableDirectExtension(&psc->base,
 722                                  "GLX_EXT_create_context_es2_profile");
 723    }
 724
 725    for (i = 0; extensions[i]; i++) {
 726       /* when on a different gpu than the server, the server pixmaps
 727        * can have a tiling mode we can't read. Thus we can't create
 728        * a texture from them.
 729        */
 730       if (!psc->is_different_gpu &&
 731          (strcmp(extensions[i]->name, __DRI_TEX_BUFFER) == 0)) {
 732          psc->texBuffer = (__DRItexBufferExtension *) extensions[i];
 733          __glXEnableDirectExtension(&psc->base, "GLX_EXT_texture_from_pixmap");
 734       }
 735
 736       if ((strcmp(extensions[i]->name, __DRI2_FLUSH) == 0)) {
 737          psc->f = (__DRI2flushExtension *) extensions[i];
 738          /* internal driver extension, no GL extension exposed */
 739       }
 740
 741       if (strcmp(extensions[i]->name, __DRI_IMAGE) == 0)
 742          psc->image = (__DRIimageExtension *) extensions[i];
 743
 744       if ((strcmp(extensions[i]->name, __DRI2_CONFIG_QUERY) == 0))
 745          psc->config = (__DRI2configQueryExtension *) extensions[i];
 746
 747       if (strcmp(extensions[i]->name, __DRI2_ROBUSTNESS) == 0)
 748          __glXEnableDirectExtension(&psc->base,
 749                                     "GLX_ARB_create_context_robustness");
 750
 751       if (strcmp(extensions[i]->name, __DRI2_RENDERER_QUERY) == 0) {
 752          psc->rendererQuery = (__DRI2rendererQueryExtension *) extensions[i];
 753          __glXEnableDirectExtension(&psc->base, "GLX_MESA_query_renderer");
 754       }
 755
 756       if (strcmp(extensions[i]->name, __DRI2_INTEROP) == 0)
 757          psc->interop = (__DRI2interopExtension*)extensions[i];
 758    }
 759 }
 760
 761 static const struct glx_screen_vtable dri3_screen_vtable = {
 762    .create_context         = dri3_create_context,
 763    .create_context_attribs = dri3_create_context_attribs,
 764    .query_renderer_integer = dri3_query_renderer_integer,
 765    .query_renderer_string  = dri3_query_renderer_string,
 766 };
 767
 768 /** dri3_create_screen
 769  *
 770  * Initialize DRI3 on the specified screen.
 771  *
 772  * Opens the DRI device, locates the appropriate DRI driver
 773  * and loads that.
 774  *
 775  * Checks to see if the driver supports the necessary extensions
 776  *
 777  * Initializes the driver for the screen and sets up our structures
 778  */
 779
 780 static struct glx_screen *
 781 dri3_create_screen(int screen, struct glx_display * priv)
 782 {
 783    xcb_connection_t *c = XGetXCBConnection(priv->dpy);
 784    const __DRIconfig **driver_configs;
 785    const __DRIextension **extensions;
 786    const struct dri3_display *const pdp = (struct dri3_display *)
 787       priv->dri3Display;
 788    struct dri3_screen *psc;
 789    __GLXDRIscreen *psp;
 790    struct glx_config *configs = NULL, *visuals = NULL;
 791    char *driverName, *deviceName, *tmp;
 792    int i;
 793    unsigned char disable;
 794
 795    psc = calloc(1, sizeof *psc);
 796    if (psc == NULL)
 797       return NULL;
 798
 799    psc->fd = -1;
 800
 801    if (!glx_screen_init(&psc->base, screen, priv)) {
 802       free(psc);
 803       return NULL;
 804    }
 805
 806    psc->fd = loader_dri3_open(c, RootWindow(priv->dpy, screen), None);
 807    if (psc->fd < 0) {
 808       int conn_error = xcb_connection_has_error(c);
 809
 810       glx_screen_cleanup(&psc->base);
 811       free(psc);
 812       InfoMessageF("screen %d does not appear to be DRI3 capable\n", screen);
 813
 814       if (conn_error)
 815          ErrorMessageF("Connection closed during DRI3 initialization failure");
 816
 817       return NULL;
 818    }
 819
 820    psc->fd = loader_get_user_preferred_fd(psc->fd, &psc->is_different_gpu);
 821    deviceName = NULL;
 822
 823    driverName = loader_get_driver_for_fd(psc->fd);
 824    if (!driverName) {
 825       ErrorMessageF("No driver found\n");
 826       goto handle_error;
 827    }
 828
 829    psc->driver = driOpenDriver(driverName);
 830    if (psc->driver == NULL) {
 831       ErrorMessageF("driver pointer missing\n");
 832       goto handle_error;
 833    }
 834
 835    extensions = driGetDriverExtensions(psc->driver, driverName);
 836    if (extensions == NULL)
 837       goto handle_error;
 838
 839    for (i = 0; extensions[i]; i++) {
 840       if (strcmp(extensions[i]->name, __DRI_CORE) == 0)
 841          psc->core = (__DRIcoreExtension *) extensions[i];
 842       if (strcmp(extensions[i]->name, __DRI_IMAGE_DRIVER) == 0)
 843          psc->image_driver = (__DRIimageDriverExtension *) extensions[i];
 844    }
 845
 846
 847    if (psc->core == NULL) {
 848       ErrorMessageF("core dri driver extension not found\n");
 849       goto handle_error;
 850    }
 851
 852    if (psc->image_driver == NULL) {
 853       ErrorMessageF("image driver extension not found\n");
 854       goto handle_error;
 855    }
 856
 857    psc->driScreen =
 858       psc->image_driver->createNewScreen2(screen, psc->fd,
 859                                           pdp->loader_extensions,
 860                                           extensions,
 861                                           &driver_configs, psc);
 862
 863    if (psc->driScreen == NULL) {
 864       ErrorMessageF("failed to create dri screen\n");
 865       goto handle_error;
 866    }
 867
 868    dri3_bind_extensions(psc, priv, driverName);
 869
 870    if (!psc->image || psc->image->base.version < 7 || !psc->image->createImageFromFds) {
 871       ErrorMessageF("Version 7 or imageFromFds image extension not found\n");
 872       goto handle_error;
 873    }
 874
 875    if (!psc->f || psc->f->base.version < 4) {
 876       ErrorMessageF("Version 4 or later of flush extension not found\n");
 877       goto handle_error;
 878    }
 879
 880    if (psc->is_different_gpu && psc->image->base.version < 9) {
 881       ErrorMessageF("Different GPU, but image extension version 9 or later not found\n");
 882       goto handle_error;
 883    }
 884
 885    if (psc->is_different_gpu && !psc->image->blitImage) {
 886       ErrorMessageF("Different GPU, but blitImage not implemented for this driver\n");
 887       goto handle_error;
 888    }
 889
 890    if (!psc->is_different_gpu && (
 891        !psc->texBuffer || psc->texBuffer->base.version < 2 ||
 892        !psc->texBuffer->setTexBuffer2
 893        )) {
 894       ErrorMessageF("Version 2 or later of texBuffer extension not found\n");
 895       goto handle_error;
 896    }
 897
 898    psc->loader_dri3_ext.core = psc->core;
 899    psc->loader_dri3_ext.image_driver = psc->image_driver;
 900    psc->loader_dri3_ext.flush = psc->f;
 901    psc->loader_dri3_ext.tex_buffer = psc->texBuffer;
 902    psc->loader_dri3_ext.image = psc->image;
 903    psc->loader_dri3_ext.config = psc->config;
 904
 905    configs = driConvertConfigs(psc->core, psc->base.configs, driver_configs);
 906    visuals = driConvertConfigs(psc->core, psc->base.visuals, driver_configs);
 907
 908    if (!configs || !visuals) {
 909        ErrorMessageF("No matching fbConfigs or visuals found\n");
 910        goto handle_error;
 911    }
 912
 913    glx_config_destroy_list(psc->base.configs);
 914    psc->base.configs = configs;
 915    glx_config_destroy_list(psc->base.visuals);
 916    psc->base.visuals = visuals;
 917
 918    psc->driver_configs = driver_configs;
 919
 920    psc->base.vtable = &dri3_screen_vtable;
 921    psp = &psc->vtable;
 922    psc->base.driScreen = psp;
 923    psp->destroyScreen = dri3_destroy_screen;
 924    psp->createDrawable = dri3_create_drawable;
 925    psp->swapBuffers = dri3_swap_buffers;
 926
 927    psp->getDrawableMSC = dri3_drawable_get_msc;
 928    psp->waitForMSC = dri3_wait_for_msc;
 929    psp->waitForSBC = dri3_wait_for_sbc;
 930    psp->setSwapInterval = dri3_set_swap_interval;
 931    psp->getSwapInterval = dri3_get_swap_interval;
 932    if (psc->config->configQueryb(psc->driScreen,
 933                                  "glx_disable_oml_sync_control",
 934                                  &disable) || !disable)
 935       __glXEnableDirectExtension(&psc->base, "GLX_OML_sync_control");
 936
 937    psp->copySubBuffer = dri3_copy_sub_buffer;
 938    __glXEnableDirectExtension(&psc->base, "GLX_MESA_copy_sub_buffer");
 939
 940    psp->getBufferAge = dri3_get_buffer_age;
 941    if (psc->config->configQueryb(psc->driScreen,
 942                                  "glx_disable_ext_buffer_age",
 943                                  &disable) || !disable)
 944       __glXEnableDirectExtension(&psc->base, "GLX_EXT_buffer_age");
 945
 946    free(driverName);
 947    free(deviceName);
 948
 949    tmp = getenv("LIBGL_SHOW_FPS");
 950    psc->show_fps_interval = tmp ? atoi(tmp) : 0;
 951    if (psc->show_fps_interval < 0)
 952       psc->show_fps_interval = 0;
 953
 954    InfoMessageF("Using DRI3 for screen %d\n", screen);
 955
 956    return &psc->base;
 957
 958 handle_error:
 959    CriticalErrorMessageF("failed to load driver: %s\n", driverName);
 960
 961    if (configs)
 962        glx_config_destroy_list(configs);
 963    if (visuals)
 964        glx_config_destroy_list(visuals);
 965    if (psc->driScreen)
 966        psc->core->destroyScreen(psc->driScreen);
 967    psc->driScreen = NULL;
 968    if (psc->fd >= 0)
 969       close(psc->fd);
 970    if (psc->driver)
 971       dlclose(psc->driver);
 972
 973    free(driverName);
 974    free(deviceName);
 975    glx_screen_cleanup(&psc->base);
 976    free(psc);
 977
 978    return NULL;
 979 }
 980
 981 /** dri_destroy_display
 982  *
 983  * Called from __glXFreeDisplayPrivate.
 984  */
 985 static void
 986 dri3_destroy_display(__GLXDRIdisplay * dpy)
 987 {
 988    free(dpy);
 989 }
 990
 991 /** dri3_create_display
 992  *
 993  * Allocate, initialize and return a __DRIdisplayPrivate object.
 994  * This is called from __glXInitialize() when we are given a new
 995  * display pointer. This is public to that function, but hidden from
 996  * outside of libGL.
 997  */
 998 _X_HIDDEN __GLXDRIdisplay *
 999 dri3_create_display(Display * dpy)
1000 {
1001    struct dri3_display                  *pdp;
1002    xcb_connection_t                     *c = XGetXCBConnection(dpy);
1003    xcb_dri3_query_version_cookie_t      dri3_cookie;
1004    xcb_dri3_query_version_reply_t       *dri3_reply;
1005    xcb_present_query_version_cookie_t   present_cookie;
1006    xcb_present_query_version_reply_t    *present_reply;
1007    xcb_generic_error_t                  *error;
1008    const xcb_query_extension_reply_t    *extension;
1009
1010    xcb_prefetch_extension_data(c, &xcb_dri3_id);
1011    xcb_prefetch_extension_data(c, &xcb_present_id);
1012
1013    extension = xcb_get_extension_data(c, &xcb_dri3_id);
1014    if (!(extension && extension->present))
1015       return NULL;
1016
1017    extension = xcb_get_extension_data(c, &xcb_present_id);
1018    if (!(extension && extension->present))
1019       return NULL;
1020
1021    dri3_cookie = xcb_dri3_query_version(c,
1022                                         XCB_DRI3_MAJOR_VERSION,
1023                                         XCB_DRI3_MINOR_VERSION);
1024
1025
1026    present_cookie = xcb_present_query_version(c,
1027                                    XCB_PRESENT_MAJOR_VERSION,
1028                                    XCB_PRESENT_MINOR_VERSION);
1029
1030    pdp = malloc(sizeof *pdp);
1031    if (pdp == NULL)
1032       return NULL;
1033
1034    dri3_reply = xcb_dri3_query_version_reply(c, dri3_cookie, &error);
1035    if (!dri3_reply) {
1036       free(error);
1037       goto no_extension;
1038    }
1039
1040    pdp->dri3Major = dri3_reply->major_version;
1041    pdp->dri3Minor = dri3_reply->minor_version;
1042    free(dri3_reply);
1043
1044    present_reply = xcb_present_query_version_reply(c, present_cookie, &error);
1045    if (!present_reply) {
1046       free(error);
1047       goto no_extension;
1048    }
1049    pdp->presentMajor = present_reply->major_version;
1050    pdp->presentMinor = present_reply->minor_version;
1051    free(present_reply);
1052
1053    pdp->base.destroyDisplay = dri3_destroy_display;
1054    pdp->base.createScreen = dri3_create_screen;
1055
1056    loader_set_logger(dri_message);
1057
1058    pdp->loader_extensions = loader_extensions;
1059
1060    return &pdp->base;
1061 no_extension:
1062    free(pdp);
1063    return NULL;
1064 }
1065
1066 #endif /* GLX_DIRECT_RENDERING */