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    return (struct dri3_drawable *)(((void*) draw) - offset);
  85 }
  86
  87 static int
  88 glx_dri3_get_swap_interval(struct loader_dri3_drawable *draw)
  89 {
  90    struct dri3_drawable *priv = loader_drawable_to_dri3_drawable(draw);
  91
  92    return priv->swap_interval;
  93 }
  94
  95 static int
  96 glx_dri3_clamp_swap_interval(struct loader_dri3_drawable *draw, int interval)
  97 {
  98    return interval;
  99 }
 100
 101 static void
 102 glx_dri3_set_swap_interval(struct loader_dri3_drawable *draw, int interval)
 103 {
 104    struct dri3_drawable *priv = loader_drawable_to_dri3_drawable(draw);
 105
 106    priv->swap_interval = interval;
 107 }
 108
 109 static void
 110 glx_dri3_set_drawable_size(struct loader_dri3_drawable *draw,
 111                            int width, int height)
 112 {
 113    /* Nothing to do */
 114 }
 115
 116 static bool
 117 glx_dri3_in_current_context(struct loader_dri3_drawable *draw)
 118 {
 119    struct dri3_drawable *priv = loader_drawable_to_dri3_drawable(draw);
 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    .clamp_swap_interval = glx_dri3_clamp_swap_interval,
 178    .set_swap_interval = glx_dri3_set_swap_interval,
 179    .set_drawable_size = glx_dri3_set_drawable_size,
 180    .in_current_context = glx_dri3_in_current_context,
 181    .get_dri_context = glx_dri3_get_dri_context,
 182    .get_dri_screen = glx_dri3_get_dri_screen,
 183    .flush_drawable = glx_dri3_flush_drawable,
 184    .show_fps = glx_dri3_show_fps,
 185 };
 186
 187
 188 static const struct glx_context_vtable dri3_context_vtable;
 189
 190 static void
 191 dri3_destroy_context(struct glx_context *context)
 192 {
 193    struct dri3_context *pcp = (struct dri3_context *) context;
 194    struct dri3_screen *psc = (struct dri3_screen *) context->psc;
 195
 196    driReleaseDrawables(&pcp->base);
 197
 198    free((char *) context->extensions);
 199
 200    (*psc->core->destroyContext) (pcp->driContext);
 201
 202    free(pcp);
 203 }
 204
 205 static Bool
 206 dri3_bind_context(struct glx_context *context, struct glx_context *old,
 207                   GLXDrawable draw, GLXDrawable read)
 208 {
 209    struct dri3_context *pcp = (struct dri3_context *) context;
 210    struct dri3_screen *psc = (struct dri3_screen *) pcp->base.psc;
 211    struct dri3_drawable *pdraw, *pread;
 212    __DRIdrawable *dri_draw = NULL, *dri_read = NULL;
 213
 214    pdraw = (struct dri3_drawable *) driFetchDrawable(context, draw);
 215    pread = (struct dri3_drawable *) driFetchDrawable(context, read);
 216
 217    driReleaseDrawables(&pcp->base);
 218
 219    if (pdraw)
 220       dri_draw = pdraw->loader_drawable.dri_drawable;
 221    else if (draw != None)
 222       return GLXBadDrawable;
 223
 224    if (pread)
 225       dri_read = pread->loader_drawable.dri_drawable;
 226    else if (read != None)
 227       return GLXBadDrawable;
 228
 229    if (!(*psc->core->bindContext) (pcp->driContext, dri_draw, dri_read))
 230       return GLXBadContext;
 231
 232    return Success;
 233 }
 234
 235 static void
 236 dri3_unbind_context(struct glx_context *context, struct glx_context *new)
 237 {
 238    struct dri3_context *pcp = (struct dri3_context *) context;
 239    struct dri3_screen *psc = (struct dri3_screen *) pcp->base.psc;
 240
 241    (*psc->core->unbindContext) (pcp->driContext);
 242 }
 243
 244 static struct glx_context *
 245 dri3_create_context_attribs(struct glx_screen *base,
 246                             struct glx_config *config_base,
 247                             struct glx_context *shareList,
 248                             unsigned num_attribs,
 249                             const uint32_t *attribs,
 250                             unsigned *error)
 251 {
 252    struct dri3_context *pcp = NULL;
 253    struct dri3_context *pcp_shared = NULL;
 254    struct dri3_screen *psc = (struct dri3_screen *) base;
 255    __GLXDRIconfigPrivate *config = (__GLXDRIconfigPrivate *) config_base;
 256    __DRIcontext *shared = NULL;
 257
 258    uint32_t minor_ver = 1;
 259    uint32_t major_ver = 2;
 260    uint32_t flags = 0;
 261    unsigned api;
 262    int reset = __DRI_CTX_RESET_NO_NOTIFICATION;
 263    uint32_t ctx_attribs[2 * 5];
 264    unsigned num_ctx_attribs = 0;
 265    uint32_t render_type;
 266
 267    /* Remap the GLX tokens to DRI2 tokens.
 268     */
 269    if (!dri2_convert_glx_attribs(num_attribs, attribs,
 270                                  &major_ver, &minor_ver,
 271                                  &render_type, &flags, &api,
 272                                  &reset, error))
 273       goto error_exit;
 274
 275    /* Check the renderType value */
 276    if (!validate_renderType_against_config(config_base, render_type))
 277        goto error_exit;
 278
 279    if (shareList) {
 280       pcp_shared = (struct dri3_context *) shareList;
 281       shared = pcp_shared->driContext;
 282    }
 283
 284    pcp = calloc(1, sizeof *pcp);
 285    if (pcp == NULL) {
 286       *error = __DRI_CTX_ERROR_NO_MEMORY;
 287       goto error_exit;
 288    }
 289
 290    if (!glx_context_init(&pcp->base, &psc->base, &config->base))
 291       goto error_exit;
 292
 293    ctx_attribs[num_ctx_attribs++] = __DRI_CTX_ATTRIB_MAJOR_VERSION;
 294    ctx_attribs[num_ctx_attribs++] = major_ver;
 295    ctx_attribs[num_ctx_attribs++] = __DRI_CTX_ATTRIB_MINOR_VERSION;
 296    ctx_attribs[num_ctx_attribs++] = minor_ver;
 297
 298    /* Only send a value when the non-default value is requested.  By doing
 299     * this we don't have to check the driver's DRI3 version before sending the
 300     * default value.
 301     */
 302    if (reset != __DRI_CTX_RESET_NO_NOTIFICATION) {
 303       ctx_attribs[num_ctx_attribs++] = __DRI_CTX_ATTRIB_RESET_STRATEGY;
 304       ctx_attribs[num_ctx_attribs++] = reset;
 305    }
 306
 307    if (flags != 0) {
 308       ctx_attribs[num_ctx_attribs++] = __DRI_CTX_ATTRIB_FLAGS;
 309
 310       /* The current __DRI_CTX_FLAG_* values are identical to the
 311        * GLX_CONTEXT_*_BIT values.
 312        */
 313       ctx_attribs[num_ctx_attribs++] = flags;
 314    }
 315
 316    pcp->driContext =
 317       (*psc->image_driver->createContextAttribs) (psc->driScreen,
 318                                                   api,
 319                                                   config->driConfig,
 320                                                   shared,
 321                                                   num_ctx_attribs / 2,
 322                                                   ctx_attribs,
 323                                                   error,
 324                                                   pcp);
 325
 326    if (pcp->driContext == NULL)
 327       goto error_exit;
 328
 329    pcp->base.vtable = &dri3_context_vtable;
 330
 331    return &pcp->base;
 332
 333 error_exit:
 334    free(pcp);
 335
 336    return NULL;
 337 }
 338
 339 static struct glx_context *
 340 dri3_create_context(struct glx_screen *base,
 341                     struct glx_config *config_base,
 342                     struct glx_context *shareList, int renderType)
 343 {
 344    unsigned int error;
 345
 346    return dri3_create_context_attribs(base, config_base, shareList,
 347                                       0, NULL, &error);
 348 }
 349
 350 static void
 351 dri3_destroy_drawable(__GLXDRIdrawable *base)
 352 {
 353    struct dri3_drawable *pdraw = (struct dri3_drawable *) base;
 354
 355    loader_dri3_drawable_fini(&pdraw->loader_drawable);
 356
 357    free(pdraw);
 358 }
 359
 360 static __GLXDRIdrawable *
 361 dri3_create_drawable(struct glx_screen *base, XID xDrawable,
 362                      GLXDrawable drawable, struct glx_config *config_base)
 363 {
 364    struct dri3_drawable *pdraw;
 365    struct dri3_screen *psc = (struct dri3_screen *) base;
 366    __GLXDRIconfigPrivate *config = (__GLXDRIconfigPrivate *) config_base;
 367
 368    pdraw = calloc(1, sizeof(*pdraw));
 369    if (!pdraw)
 370       return NULL;
 371
 372    pdraw->base.destroyDrawable = dri3_destroy_drawable;
 373    pdraw->base.xDrawable = xDrawable;
 374    pdraw->base.drawable = drawable;
 375    pdraw->base.psc = &psc->base;
 376
 377    (void) __glXInitialize(psc->base.dpy);
 378
 379    if (loader_dri3_drawable_init(XGetXCBConnection(base->dpy),
 380                                  xDrawable, psc->driScreen,
 381                                  psc->is_different_gpu, config->driConfig,
 382                                  &psc->loader_dri3_ext, &glx_dri3_vtable,
 383                                  &pdraw->loader_drawable)) {
 384       free(pdraw);
 385       return NULL;
 386    }
 387
 388    return &pdraw->base;
 389 }
 390
 391 /** dri3_wait_for_msc
 392  *
 393  * Get the X server to send an event when the target msc/divisor/remainder is
 394  * reached.
 395  */
 396 static int
 397 dri3_wait_for_msc(__GLXDRIdrawable *pdraw, int64_t target_msc, int64_t divisor,
 398                   int64_t remainder, int64_t *ust, int64_t *msc, int64_t *sbc)
 399 {
 400    struct dri3_drawable *priv = (struct dri3_drawable *) pdraw;
 401
 402    loader_dri3_wait_for_msc(&priv->loader_drawable, target_msc, divisor,
 403                             remainder, ust, msc, sbc);
 404
 405    return 1;
 406 }
 407
 408 /** dri3_drawable_get_msc
 409  *
 410  * Return the current UST/MSC/SBC triplet by asking the server
 411  * for an event
 412  */
 413 static int
 414 dri3_drawable_get_msc(struct glx_screen *psc, __GLXDRIdrawable *pdraw,
 415                       int64_t *ust, int64_t *msc, int64_t *sbc)
 416 {
 417    return dri3_wait_for_msc(pdraw, 0, 0, 0, ust, msc,sbc);
 418 }
 419
 420 /** dri3_wait_for_sbc
 421  *
 422  * Wait for the completed swap buffer count to reach the specified
 423  * target. Presumably the application knows that this will be reached with
 424  * outstanding complete events, or we're going to be here awhile.
 425  */
 426 static int
 427 dri3_wait_for_sbc(__GLXDRIdrawable *pdraw, int64_t target_sbc, int64_t *ust,
 428                   int64_t *msc, int64_t *sbc)
 429 {
 430    struct dri3_drawable *priv = (struct dri3_drawable *) pdraw;
 431
 432    return loader_dri3_wait_for_sbc(&priv->loader_drawable, target_sbc,
 433                                    ust, msc, sbc);
 434 }
 435
 436 static void
 437 dri3_copy_sub_buffer(__GLXDRIdrawable *pdraw, int x, int y,
 438                      int width, int height,
 439                      Bool flush)
 440 {
 441    struct dri3_drawable *priv = (struct dri3_drawable *) pdraw;
 442
 443    loader_dri3_copy_sub_buffer(&priv->loader_drawable, x, y,
 444                                width, height, flush);
 445 }
 446
 447 static void
 448 dri3_wait_x(struct glx_context *gc)
 449 {
 450    struct dri3_drawable *priv = (struct dri3_drawable *)
 451       GetGLXDRIDrawable(gc->currentDpy, gc->currentDrawable);
 452
 453    if (priv)
 454       loader_dri3_wait_x(&priv->loader_drawable);
 455 }
 456
 457 static void
 458 dri3_wait_gl(struct glx_context *gc)
 459 {
 460    struct dri3_drawable *priv = (struct dri3_drawable *)
 461       GetGLXDRIDrawable(gc->currentDpy, gc->currentDrawable);
 462
 463    if (priv)
 464       loader_dri3_wait_gl(&priv->loader_drawable);
 465 }
 466
 467 /**
 468  * Called by the driver when it needs to update the real front buffer with the
 469  * contents of its fake front buffer.
 470  */
 471 static void
 472 dri3_flush_front_buffer(__DRIdrawable *driDrawable, void *loaderPrivate)
 473 {
 474    struct loader_dri3_drawable *draw = loaderPrivate;
 475    struct dri3_drawable *pdraw = loader_drawable_to_dri3_drawable(draw);
 476    struct dri3_screen *psc;
 477
 478    if (!pdraw)
 479       return;
 480
 481    if (!pdraw->base.psc)
 482       return;
 483
 484    psc = (struct dri3_screen *) pdraw->base.psc;
 485
 486    (void) __glXInitialize(psc->base.dpy);
 487
 488    loader_dri3_flush(draw, __DRI2_FLUSH_DRAWABLE, __DRI2_THROTTLE_FLUSHFRONT);
 489
 490    loader_dri3_wait_gl(draw);
 491 }
 492
 493 /* The image loader extension record for DRI3
 494  */
 495 static const __DRIimageLoaderExtension imageLoaderExtension = {
 496    .base = { __DRI_IMAGE_LOADER, 1 },
 497
 498    .getBuffers          = loader_dri3_get_buffers,
 499    .flushFrontBuffer    = dri3_flush_front_buffer,
 500 };
 501
 502 const __DRIuseInvalidateExtension dri3UseInvalidate = {
 503    .base = { __DRI_USE_INVALIDATE, 1 }
 504 };
 505
 506 static const __DRIextension *loader_extensions[] = {
 507    &imageLoaderExtension.base,
 508    &systemTimeExtension.base,
 509    &dri3UseInvalidate.base,
 510    NULL
 511 };
 512
 513 /** dri3_swap_buffers
 514  *
 515  * Make the current back buffer visible using the present extension
 516  */
 517 static int64_t
 518 dri3_swap_buffers(__GLXDRIdrawable *pdraw, int64_t target_msc, int64_t divisor,
 519                   int64_t remainder, Bool flush)
 520 {
 521    struct dri3_drawable *priv = (struct dri3_drawable *) pdraw;
 522    unsigned flags = __DRI2_FLUSH_DRAWABLE;
 523
 524    if (flush)
 525       flags |= __DRI2_FLUSH_CONTEXT;
 526
 527    return loader_dri3_swap_buffers_msc(&priv->loader_drawable,
 528                                        target_msc, divisor, remainder,
 529                                        flags, false);
 530 }
 531
 532 static int
 533 dri3_get_buffer_age(__GLXDRIdrawable *pdraw)
 534 {
 535    struct dri3_drawable *priv = (struct dri3_drawable *)pdraw;
 536
 537    return loader_dri3_query_buffer_age(&priv->loader_drawable);
 538 }
 539
 540 /** dri3_destroy_screen
 541  */
 542 static void
 543 dri3_destroy_screen(struct glx_screen *base)
 544 {
 545    struct dri3_screen *psc = (struct dri3_screen *) base;
 546
 547    /* Free the direct rendering per screen data */
 548    (*psc->core->destroyScreen) (psc->driScreen);
 549    driDestroyConfigs(psc->driver_configs);
 550    close(psc->fd);
 551    free(psc);
 552 }
 553
 554 /** dri3_set_swap_interval
 555  *
 556  * Record the application swap interval specification,
 557  */
 558 static int
 559 dri3_set_swap_interval(__GLXDRIdrawable *pdraw, int interval)
 560 {
 561    struct dri3_drawable *priv =  (struct dri3_drawable *) pdraw;
 562    GLint vblank_mode = DRI_CONF_VBLANK_DEF_INTERVAL_1;
 563    struct dri3_screen *psc = (struct dri3_screen *) priv->base.psc;
 564
 565    if (psc->config)
 566       psc->config->configQueryi(psc->driScreen,
 567                                 "vblank_mode", &vblank_mode);
 568
 569    switch (vblank_mode) {
 570    case DRI_CONF_VBLANK_NEVER:
 571       if (interval != 0)
 572          return GLX_BAD_VALUE;
 573       break;
 574    case DRI_CONF_VBLANK_ALWAYS_SYNC:
 575       if (interval <= 0)
 576          return GLX_BAD_VALUE;
 577       break;
 578    default:
 579       break;
 580    }
 581
 582    loader_dri3_set_swap_interval(&priv->loader_drawable, interval);
 583
 584    return 0;
 585 }
 586
 587 /** dri3_get_swap_interval
 588  *
 589  * Return the stored swap interval
 590  */
 591 static int
 592 dri3_get_swap_interval(__GLXDRIdrawable *pdraw)
 593 {
 594    struct dri3_drawable *priv =  (struct dri3_drawable *) pdraw;
 595
 596   return priv->swap_interval;
 597 }
 598
 599 static void
 600 dri3_bind_tex_image(Display * dpy,
 601                     GLXDrawable drawable,
 602                     int buffer, const int *attrib_list)
 603 {
 604    struct glx_context *gc = __glXGetCurrentContext();
 605    struct dri3_context *pcp = (struct dri3_context *) gc;
 606    __GLXDRIdrawable *base = GetGLXDRIDrawable(dpy, drawable);
 607    struct dri3_drawable *pdraw = (struct dri3_drawable *) base;
 608    struct dri3_screen *psc;
 609
 610    if (pdraw != NULL) {
 611       psc = (struct dri3_screen *) base->psc;
 612
 613       (*psc->f->invalidate)(pdraw->loader_drawable.dri_drawable);
 614
 615       XSync(dpy, false);
 616
 617       (*psc->texBuffer->setTexBuffer2) (pcp->driContext,
 618                                         pdraw->base.textureTarget,
 619                                         pdraw->base.textureFormat,
 620                                         pdraw->loader_drawable.dri_drawable);
 621    }
 622 }
 623
 624 static void
 625 dri3_release_tex_image(Display * dpy, GLXDrawable drawable, int buffer)
 626 {
 627    struct glx_context *gc = __glXGetCurrentContext();
 628    struct dri3_context *pcp = (struct dri3_context *) gc;
 629    __GLXDRIdrawable *base = GetGLXDRIDrawable(dpy, drawable);
 630    struct dri3_drawable *pdraw = (struct dri3_drawable *) base;
 631    struct dri3_screen *psc;
 632
 633    if (pdraw != NULL) {
 634       psc = (struct dri3_screen *) base->psc;
 635
 636       if (psc->texBuffer->base.version >= 3 &&
 637           psc->texBuffer->releaseTexBuffer != NULL)
 638          (*psc->texBuffer->releaseTexBuffer) (pcp->driContext,
 639                                               pdraw->base.textureTarget,
 640                                               pdraw->loader_drawable.dri_drawable);
 641    }
 642 }
 643
 644 static const struct glx_context_vtable dri3_context_vtable = {
 645    .destroy             = dri3_destroy_context,
 646    .bind                = dri3_bind_context,
 647    .unbind              = dri3_unbind_context,
 648    .wait_gl             = dri3_wait_gl,
 649    .wait_x              = dri3_wait_x,
 650    .use_x_font          = DRI_glXUseXFont,
 651    .bind_tex_image      = dri3_bind_tex_image,
 652    .release_tex_image   = dri3_release_tex_image,
 653    .get_proc_address    = NULL,
 654    .interop_query_device_info = dri3_interop_query_device_info,
 655    .interop_export_object = dri3_interop_export_object
 656 };
 657
 658 /** dri3_bind_extensions
 659  *
 660  * Enable all of the extensions supported on DRI3
 661  */
 662 static void
 663 dri3_bind_extensions(struct dri3_screen *psc, struct glx_display * priv,
 664                      const char *driverName)
 665 {
 666    const __DRIextension **extensions;
 667    unsigned mask;
 668    int i;
 669
 670    extensions = psc->core->getExtensions(psc->driScreen);
 671
 672    __glXEnableDirectExtension(&psc->base, "GLX_SGI_video_sync");
 673    __glXEnableDirectExtension(&psc->base, "GLX_SGI_swap_control");
 674    __glXEnableDirectExtension(&psc->base, "GLX_MESA_swap_control");
 675    __glXEnableDirectExtension(&psc->base, "GLX_SGI_make_current_read");
 676    __glXEnableDirectExtension(&psc->base, "GLX_INTEL_swap_event");
 677
 678    mask = psc->image_driver->getAPIMask(psc->driScreen);
 679
 680    __glXEnableDirectExtension(&psc->base, "GLX_ARB_create_context");
 681    __glXEnableDirectExtension(&psc->base, "GLX_ARB_create_context_profile");
 682
 683    if ((mask & ((1 << __DRI_API_GLES) |
 684                 (1 << __DRI_API_GLES2) |
 685                 (1 << __DRI_API_GLES3))) != 0) {
 686       __glXEnableDirectExtension(&psc->base,
 687                                  "GLX_EXT_create_context_es_profile");
 688       __glXEnableDirectExtension(&psc->base,
 689                                  "GLX_EXT_create_context_es2_profile");
 690    }
 691
 692    for (i = 0; extensions[i]; i++) {
 693       /* when on a different gpu than the server, the server pixmaps
 694        * can have a tiling mode we can't read. Thus we can't create
 695        * a texture from them.
 696        */
 697       if (!psc->is_different_gpu &&
 698          (strcmp(extensions[i]->name, __DRI_TEX_BUFFER) == 0)) {
 699          psc->texBuffer = (__DRItexBufferExtension *) extensions[i];
 700          __glXEnableDirectExtension(&psc->base, "GLX_EXT_texture_from_pixmap");
 701       }
 702
 703       if ((strcmp(extensions[i]->name, __DRI2_FLUSH) == 0)) {
 704          psc->f = (__DRI2flushExtension *) extensions[i];
 705          /* internal driver extension, no GL extension exposed */
 706       }
 707
 708       if (strcmp(extensions[i]->name, __DRI_IMAGE) == 0)
 709          psc->image = (__DRIimageExtension *) extensions[i];
 710
 711       if ((strcmp(extensions[i]->name, __DRI2_CONFIG_QUERY) == 0))
 712          psc->config = (__DRI2configQueryExtension *) extensions[i];
 713
 714       if (strcmp(extensions[i]->name, __DRI2_ROBUSTNESS) == 0)
 715          __glXEnableDirectExtension(&psc->base,
 716                                     "GLX_ARB_create_context_robustness");
 717
 718       if (strcmp(extensions[i]->name, __DRI2_RENDERER_QUERY) == 0) {
 719          psc->rendererQuery = (__DRI2rendererQueryExtension *) extensions[i];
 720          __glXEnableDirectExtension(&psc->base, "GLX_MESA_query_renderer");
 721       }
 722
 723       if (strcmp(extensions[i]->name, __DRI2_INTEROP) == 0)
 724          psc->interop = (__DRI2interopExtension*)extensions[i];
 725    }
 726 }
 727
 728 static const struct glx_screen_vtable dri3_screen_vtable = {
 729    .create_context         = dri3_create_context,
 730    .create_context_attribs = dri3_create_context_attribs,
 731    .query_renderer_integer = dri3_query_renderer_integer,
 732    .query_renderer_string  = dri3_query_renderer_string,
 733 };
 734
 735 /** dri3_create_screen
 736  *
 737  * Initialize DRI3 on the specified screen.
 738  *
 739  * Opens the DRI device, locates the appropriate DRI driver
 740  * and loads that.
 741  *
 742  * Checks to see if the driver supports the necessary extensions
 743  *
 744  * Initializes the driver for the screen and sets up our structures
 745  */
 746
 747 static struct glx_screen *
 748 dri3_create_screen(int screen, struct glx_display * priv)
 749 {
 750    xcb_connection_t *c = XGetXCBConnection(priv->dpy);
 751    const __DRIconfig **driver_configs;
 752    const __DRIextension **extensions;
 753    const struct dri3_display *const pdp = (struct dri3_display *)
 754       priv->dri3Display;
 755    struct dri3_screen *psc;
 756    __GLXDRIscreen *psp;
 757    struct glx_config *configs = NULL, *visuals = NULL;
 758    char *driverName, *deviceName, *tmp;
 759    int i;
 760
 761    psc = calloc(1, sizeof *psc);
 762    if (psc == NULL)
 763       return NULL;
 764
 765    psc->fd = -1;
 766
 767    if (!glx_screen_init(&psc->base, screen, priv)) {
 768       free(psc);
 769       return NULL;
 770    }
 771
 772    psc->fd = loader_dri3_open(c, RootWindow(priv->dpy, screen), None);
 773    if (psc->fd < 0) {
 774       int conn_error = xcb_connection_has_error(c);
 775
 776       glx_screen_cleanup(&psc->base);
 777       free(psc);
 778       InfoMessageF("screen %d does not appear to be DRI3 capable\n", screen);
 779
 780       if (conn_error)
 781          ErrorMessageF("Connection closed during DRI3 initialization failure");
 782
 783       return NULL;
 784    }
 785
 786    psc->fd = loader_get_user_preferred_fd(psc->fd, &psc->is_different_gpu);
 787    deviceName = NULL;
 788
 789    driverName = loader_get_driver_for_fd(psc->fd);
 790    if (!driverName) {
 791       ErrorMessageF("No driver found\n");
 792       goto handle_error;
 793    }
 794
 795    psc->driver = driOpenDriver(driverName);
 796    if (psc->driver == NULL) {
 797       ErrorMessageF("driver pointer missing\n");
 798       goto handle_error;
 799    }
 800
 801    extensions = driGetDriverExtensions(psc->driver, driverName);
 802    if (extensions == NULL)
 803       goto handle_error;
 804
 805    for (i = 0; extensions[i]; i++) {
 806       if (strcmp(extensions[i]->name, __DRI_CORE) == 0)
 807          psc->core = (__DRIcoreExtension *) extensions[i];
 808       if (strcmp(extensions[i]->name, __DRI_IMAGE_DRIVER) == 0)
 809          psc->image_driver = (__DRIimageDriverExtension *) extensions[i];
 810    }
 811
 812
 813    if (psc->core == NULL) {
 814       ErrorMessageF("core dri driver extension not found\n");
 815       goto handle_error;
 816    }
 817
 818    if (psc->image_driver == NULL) {
 819       ErrorMessageF("image driver extension not found\n");
 820       goto handle_error;
 821    }
 822
 823    psc->driScreen =
 824       psc->image_driver->createNewScreen2(screen, psc->fd,
 825                                           pdp->loader_extensions,
 826                                           extensions,
 827                                           &driver_configs, psc);
 828
 829    if (psc->driScreen == NULL) {
 830       ErrorMessageF("failed to create dri screen\n");
 831       goto handle_error;
 832    }
 833
 834    dri3_bind_extensions(psc, priv, driverName);
 835
 836    if (!psc->image || psc->image->base.version < 7 || !psc->image->createImageFromFds) {
 837       ErrorMessageF("Version 7 or imageFromFds image extension not found\n");
 838       goto handle_error;
 839    }
 840
 841    if (!psc->f || psc->f->base.version < 4) {
 842       ErrorMessageF("Version 4 or later of flush extension not found\n");
 843       goto handle_error;
 844    }
 845
 846    if (psc->is_different_gpu && psc->image->base.version < 9) {
 847       ErrorMessageF("Different GPU, but image extension version 9 or later not found\n");
 848       goto handle_error;
 849    }
 850
 851    if (psc->is_different_gpu && !psc->image->blitImage) {
 852       ErrorMessageF("Different GPU, but blitImage not implemented for this driver\n");
 853       goto handle_error;
 854    }
 855
 856    if (!psc->is_different_gpu && (
 857        !psc->texBuffer || psc->texBuffer->base.version < 2 ||
 858        !psc->texBuffer->setTexBuffer2
 859        )) {
 860       ErrorMessageF("Version 2 or later of texBuffer extension not found\n");
 861       goto handle_error;
 862    }
 863
 864    psc->loader_dri3_ext.core = psc->core;
 865    psc->loader_dri3_ext.image_driver = psc->image_driver;
 866    psc->loader_dri3_ext.flush = psc->f;
 867    psc->loader_dri3_ext.tex_buffer = psc->texBuffer;
 868    psc->loader_dri3_ext.image = psc->image;
 869    psc->loader_dri3_ext.config = psc->config;
 870
 871    configs = driConvertConfigs(psc->core, psc->base.configs, driver_configs);
 872    visuals = driConvertConfigs(psc->core, psc->base.visuals, driver_configs);
 873
 874    if (!configs || !visuals) {
 875        ErrorMessageF("No matching fbConfigs or visuals found\n");
 876        goto handle_error;
 877    }
 878
 879    glx_config_destroy_list(psc->base.configs);
 880    psc->base.configs = configs;
 881    glx_config_destroy_list(psc->base.visuals);
 882    psc->base.visuals = visuals;
 883
 884    psc->driver_configs = driver_configs;
 885
 886    psc->base.vtable = &dri3_screen_vtable;
 887    psp = &psc->vtable;
 888    psc->base.driScreen = psp;
 889    psp->destroyScreen = dri3_destroy_screen;
 890    psp->createDrawable = dri3_create_drawable;
 891    psp->swapBuffers = dri3_swap_buffers;
 892
 893    psp->getDrawableMSC = dri3_drawable_get_msc;
 894    psp->waitForMSC = dri3_wait_for_msc;
 895    psp->waitForSBC = dri3_wait_for_sbc;
 896    psp->setSwapInterval = dri3_set_swap_interval;
 897    psp->getSwapInterval = dri3_get_swap_interval;
 898    __glXEnableDirectExtension(&psc->base, "GLX_OML_sync_control");
 899
 900    psp->copySubBuffer = dri3_copy_sub_buffer;
 901    __glXEnableDirectExtension(&psc->base, "GLX_MESA_copy_sub_buffer");
 902
 903    psp->getBufferAge = dri3_get_buffer_age;
 904    __glXEnableDirectExtension(&psc->base, "GLX_EXT_buffer_age");
 905
 906    free(driverName);
 907    free(deviceName);
 908
 909    tmp = getenv("LIBGL_SHOW_FPS");
 910    psc->show_fps_interval = tmp ? atoi(tmp) : 0;
 911    if (psc->show_fps_interval < 0)
 912       psc->show_fps_interval = 0;
 913
 914    InfoMessageF("Using DRI3 for screen %d\n", screen);
 915
 916    return &psc->base;
 917
 918 handle_error:
 919    CriticalErrorMessageF("failed to load driver: %s\n", driverName);
 920
 921    if (configs)
 922        glx_config_destroy_list(configs);
 923    if (visuals)
 924        glx_config_destroy_list(visuals);
 925    if (psc->driScreen)
 926        psc->core->destroyScreen(psc->driScreen);
 927    psc->driScreen = NULL;
 928    if (psc->fd >= 0)
 929       close(psc->fd);
 930    if (psc->driver)
 931       dlclose(psc->driver);
 932
 933    free(driverName);
 934    free(deviceName);
 935    glx_screen_cleanup(&psc->base);
 936    free(psc);
 937
 938    return NULL;
 939 }
 940
 941 /** dri_destroy_display
 942  *
 943  * Called from __glXFreeDisplayPrivate.
 944  */
 945 static void
 946 dri3_destroy_display(__GLXDRIdisplay * dpy)
 947 {
 948    free(dpy);
 949 }
 950
 951 /** dri3_create_display
 952  *
 953  * Allocate, initialize and return a __DRIdisplayPrivate object.
 954  * This is called from __glXInitialize() when we are given a new
 955  * display pointer. This is public to that function, but hidden from
 956  * outside of libGL.
 957  */
 958 _X_HIDDEN __GLXDRIdisplay *
 959 dri3_create_display(Display * dpy)
 960 {
 961    struct dri3_display                  *pdp;
 962    xcb_connection_t                     *c = XGetXCBConnection(dpy);
 963    xcb_dri3_query_version_cookie_t      dri3_cookie;
 964    xcb_dri3_query_version_reply_t       *dri3_reply;
 965    xcb_present_query_version_cookie_t   present_cookie;
 966    xcb_present_query_version_reply_t    *present_reply;
 967    xcb_generic_error_t                  *error;
 968    const xcb_query_extension_reply_t    *extension;
 969
 970    xcb_prefetch_extension_data(c, &xcb_dri3_id);
 971    xcb_prefetch_extension_data(c, &xcb_present_id);
 972
 973    extension = xcb_get_extension_data(c, &xcb_dri3_id);
 974    if (!(extension && extension->present))
 975       return NULL;
 976
 977    extension = xcb_get_extension_data(c, &xcb_present_id);
 978    if (!(extension && extension->present))
 979       return NULL;
 980
 981    dri3_cookie = xcb_dri3_query_version(c,
 982                                         XCB_DRI3_MAJOR_VERSION,
 983                                         XCB_DRI3_MINOR_VERSION);
 984
 985
 986    present_cookie = xcb_present_query_version(c,
 987                                    XCB_PRESENT_MAJOR_VERSION,
 988                                    XCB_PRESENT_MINOR_VERSION);
 989
 990    pdp = malloc(sizeof *pdp);
 991    if (pdp == NULL)
 992       return NULL;
 993
 994    dri3_reply = xcb_dri3_query_version_reply(c, dri3_cookie, &error);
 995    if (!dri3_reply) {
 996       free(error);
 997       goto no_extension;
 998    }
 999
1000    pdp->dri3Major = dri3_reply->major_version;
1001    pdp->dri3Minor = dri3_reply->minor_version;
1002    free(dri3_reply);
1003
1004    present_reply = xcb_present_query_version_reply(c, present_cookie, &error);
1005    if (!present_reply) {
1006       free(error);
1007       goto no_extension;
1008    }
1009    pdp->presentMajor = present_reply->major_version;
1010    pdp->presentMinor = present_reply->minor_version;
1011    free(present_reply);
1012
1013    pdp->base.destroyDisplay = dri3_destroy_display;
1014    pdp->base.createScreen = dri3_create_screen;
1015
1016    loader_set_logger(dri_message);
1017
1018    pdp->loader_extensions = loader_extensions;
1019
1020    return &pdp->base;
1021 no_extension:
1022    free(pdp);
1023    return NULL;
1024 }
1025
1026 #endif /* GLX_DIRECT_RENDERING */