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
 131    if (gc) {
 132       struct dri3_context *dri3Ctx = (struct dri3_context *) gc;
 133       return dri3Ctx->driContext;
 134    }
 135
 136    return NULL;
 137 }
 138
 139 static void
 140 glx_dri3_flush_drawable(struct loader_dri3_drawable *draw, unsigned flags)
 141 {
 142    loader_dri3_flush(draw, flags, __DRI2_THROTTLE_SWAPBUFFER);
 143 }
 144
 145 static void
 146 glx_dri3_show_fps(struct loader_dri3_drawable *draw, uint64_t current_ust)
 147 {
 148    struct dri3_drawable *priv = loader_drawable_to_dri3_drawable(draw);
 149    const uint64_t interval =
 150       ((struct dri3_screen *) priv->base.psc)->show_fps_interval;
 151
 152    if (!interval)
 153       return;
 154
 155    priv->frames++;
 156
 157    /* DRI3+Present together uses microseconds for UST. */
 158    if (priv->previous_ust + interval * 1000000 <= current_ust) {
 159       if (priv->previous_ust) {
 160          fprintf(stderr, "libGL: FPS = %.1f\n",
 161                  ((uint64_t) priv->frames * 1000000) /
 162                  (double)(current_ust - priv->previous_ust));
 163       }
 164       priv->frames = 0;
 165       priv->previous_ust = current_ust;
 166    }
 167 }
 168
 169 static struct loader_dri3_vtable glx_dri3_vtable = {
 170    .get_swap_interval = glx_dri3_get_swap_interval,
 171    .clamp_swap_interval = glx_dri3_clamp_swap_interval,
 172    .set_swap_interval = glx_dri3_set_swap_interval,
 173    .set_drawable_size = glx_dri3_set_drawable_size,
 174    .in_current_context = glx_dri3_in_current_context,
 175    .get_dri_context = glx_dri3_get_dri_context,
 176    .flush_drawable = glx_dri3_flush_drawable,
 177    .show_fps = glx_dri3_show_fps,
 178 };
 179
 180
 181 static const struct glx_context_vtable dri3_context_vtable;
 182
 183 static void
 184 dri3_destroy_context(struct glx_context *context)
 185 {
 186    struct dri3_context *pcp = (struct dri3_context *) context;
 187    struct dri3_screen *psc = (struct dri3_screen *) context->psc;
 188
 189    driReleaseDrawables(&pcp->base);
 190
 191    free((char *) context->extensions);
 192
 193    (*psc->core->destroyContext) (pcp->driContext);
 194
 195    free(pcp);
 196 }
 197
 198 static Bool
 199 dri3_bind_context(struct glx_context *context, struct glx_context *old,
 200                   GLXDrawable draw, GLXDrawable read)
 201 {
 202    struct dri3_context *pcp = (struct dri3_context *) context;
 203    struct dri3_screen *psc = (struct dri3_screen *) pcp->base.psc;
 204    struct dri3_drawable *pdraw, *pread;
 205
 206    pdraw = (struct dri3_drawable *) driFetchDrawable(context, draw);
 207    pread = (struct dri3_drawable *) driFetchDrawable(context, read);
 208
 209    driReleaseDrawables(&pcp->base);
 210
 211    if (pdraw == NULL || pread == NULL)
 212       return GLXBadDrawable;
 213
 214    if (!(*psc->core->bindContext) (pcp->driContext,
 215                                    pdraw->loader_drawable.dri_drawable,
 216                                    pread->loader_drawable.dri_drawable))
 217       return GLXBadContext;
 218
 219    return Success;
 220 }
 221
 222 static void
 223 dri3_unbind_context(struct glx_context *context, struct glx_context *new)
 224 {
 225    struct dri3_context *pcp = (struct dri3_context *) context;
 226    struct dri3_screen *psc = (struct dri3_screen *) pcp->base.psc;
 227
 228    (*psc->core->unbindContext) (pcp->driContext);
 229 }
 230
 231 static struct glx_context *
 232 dri3_create_context_attribs(struct glx_screen *base,
 233                             struct glx_config *config_base,
 234                             struct glx_context *shareList,
 235                             unsigned num_attribs,
 236                             const uint32_t *attribs,
 237                             unsigned *error)
 238 {
 239    struct dri3_context *pcp = NULL;
 240    struct dri3_context *pcp_shared = NULL;
 241    struct dri3_screen *psc = (struct dri3_screen *) base;
 242    __GLXDRIconfigPrivate *config = (__GLXDRIconfigPrivate *) config_base;
 243    __DRIcontext *shared = NULL;
 244
 245    uint32_t minor_ver = 1;
 246    uint32_t major_ver = 2;
 247    uint32_t flags = 0;
 248    unsigned api;
 249    int reset = __DRI_CTX_RESET_NO_NOTIFICATION;
 250    uint32_t ctx_attribs[2 * 5];
 251    unsigned num_ctx_attribs = 0;
 252    uint32_t render_type;
 253
 254    /* Remap the GLX tokens to DRI2 tokens.
 255     */
 256    if (!dri2_convert_glx_attribs(num_attribs, attribs,
 257                                  &major_ver, &minor_ver,
 258                                  &render_type, &flags, &api,
 259                                  &reset, error))
 260       goto error_exit;
 261
 262    /* Check the renderType value */
 263    if (!validate_renderType_against_config(config_base, render_type))
 264        goto error_exit;
 265
 266    if (shareList) {
 267       pcp_shared = (struct dri3_context *) shareList;
 268       shared = pcp_shared->driContext;
 269    }
 270
 271    pcp = calloc(1, sizeof *pcp);
 272    if (pcp == NULL) {
 273       *error = __DRI_CTX_ERROR_NO_MEMORY;
 274       goto error_exit;
 275    }
 276
 277    if (!glx_context_init(&pcp->base, &psc->base, &config->base))
 278       goto error_exit;
 279
 280    ctx_attribs[num_ctx_attribs++] = __DRI_CTX_ATTRIB_MAJOR_VERSION;
 281    ctx_attribs[num_ctx_attribs++] = major_ver;
 282    ctx_attribs[num_ctx_attribs++] = __DRI_CTX_ATTRIB_MINOR_VERSION;
 283    ctx_attribs[num_ctx_attribs++] = minor_ver;
 284
 285    /* Only send a value when the non-default value is requested.  By doing
 286     * this we don't have to check the driver's DRI3 version before sending the
 287     * default value.
 288     */
 289    if (reset != __DRI_CTX_RESET_NO_NOTIFICATION) {
 290       ctx_attribs[num_ctx_attribs++] = __DRI_CTX_ATTRIB_RESET_STRATEGY;
 291       ctx_attribs[num_ctx_attribs++] = reset;
 292    }
 293
 294    if (flags != 0) {
 295       ctx_attribs[num_ctx_attribs++] = __DRI_CTX_ATTRIB_FLAGS;
 296
 297       /* The current __DRI_CTX_FLAG_* values are identical to the
 298        * GLX_CONTEXT_*_BIT values.
 299        */
 300       ctx_attribs[num_ctx_attribs++] = flags;
 301    }
 302
 303    pcp->driContext =
 304       (*psc->image_driver->createContextAttribs) (psc->driScreen,
 305                                                   api,
 306                                                   config->driConfig,
 307                                                   shared,
 308                                                   num_ctx_attribs / 2,
 309                                                   ctx_attribs,
 310                                                   error,
 311                                                   pcp);
 312
 313    if (pcp->driContext == NULL)
 314       goto error_exit;
 315
 316    pcp->base.vtable = &dri3_context_vtable;
 317
 318    return &pcp->base;
 319
 320 error_exit:
 321    free(pcp);
 322
 323    return NULL;
 324 }
 325
 326 static struct glx_context *
 327 dri3_create_context(struct glx_screen *base,
 328                     struct glx_config *config_base,
 329                     struct glx_context *shareList, int renderType)
 330 {
 331    unsigned int error;
 332
 333    return dri3_create_context_attribs(base, config_base, shareList,
 334                                       0, NULL, &error);
 335 }
 336
 337 static void
 338 dri3_destroy_drawable(__GLXDRIdrawable *base)
 339 {
 340    struct dri3_drawable *pdraw = (struct dri3_drawable *) base;
 341
 342    loader_dri3_drawable_fini(&pdraw->loader_drawable);
 343
 344    free(pdraw);
 345 }
 346
 347 static __GLXDRIdrawable *
 348 dri3_create_drawable(struct glx_screen *base, XID xDrawable,
 349                      GLXDrawable drawable, struct glx_config *config_base)
 350 {
 351    struct dri3_drawable *pdraw;
 352    struct dri3_screen *psc = (struct dri3_screen *) base;
 353    __GLXDRIconfigPrivate *config = (__GLXDRIconfigPrivate *) config_base;
 354
 355    pdraw = calloc(1, sizeof(*pdraw));
 356    if (!pdraw)
 357       return NULL;
 358
 359    pdraw->base.destroyDrawable = dri3_destroy_drawable;
 360    pdraw->base.xDrawable = xDrawable;
 361    pdraw->base.drawable = drawable;
 362    pdraw->base.psc = &psc->base;
 363
 364    (void) __glXInitialize(psc->base.dpy);
 365
 366    if (loader_dri3_drawable_init(XGetXCBConnection(base->dpy),
 367                                  xDrawable, psc->driScreen,
 368                                  psc->is_different_gpu, config->driConfig,
 369                                  &psc->loader_dri3_ext, &glx_dri3_vtable,
 370                                  &pdraw->loader_drawable)) {
 371       free(pdraw);
 372       return NULL;
 373    }
 374
 375    return &pdraw->base;
 376 }
 377
 378 /** dri3_wait_for_msc
 379  *
 380  * Get the X server to send an event when the target msc/divisor/remainder is
 381  * reached.
 382  */
 383 static int
 384 dri3_wait_for_msc(__GLXDRIdrawable *pdraw, int64_t target_msc, int64_t divisor,
 385                   int64_t remainder, int64_t *ust, int64_t *msc, int64_t *sbc)
 386 {
 387    struct dri3_drawable *priv = (struct dri3_drawable *) pdraw;
 388
 389    loader_dri3_wait_for_msc(&priv->loader_drawable, target_msc, divisor,
 390                             remainder, ust, msc, sbc);
 391
 392    return 1;
 393 }
 394
 395 /** dri3_drawable_get_msc
 396  *
 397  * Return the current UST/MSC/SBC triplet by asking the server
 398  * for an event
 399  */
 400 static int
 401 dri3_drawable_get_msc(struct glx_screen *psc, __GLXDRIdrawable *pdraw,
 402                       int64_t *ust, int64_t *msc, int64_t *sbc)
 403 {
 404    return dri3_wait_for_msc(pdraw, 0, 0, 0, ust, msc,sbc);
 405 }
 406
 407 /** dri3_wait_for_sbc
 408  *
 409  * Wait for the completed swap buffer count to reach the specified
 410  * target. Presumably the application knows that this will be reached with
 411  * outstanding complete events, or we're going to be here awhile.
 412  */
 413 static int
 414 dri3_wait_for_sbc(__GLXDRIdrawable *pdraw, int64_t target_sbc, int64_t *ust,
 415                   int64_t *msc, int64_t *sbc)
 416 {
 417    struct dri3_drawable *priv = (struct dri3_drawable *) pdraw;
 418
 419    return loader_dri3_wait_for_sbc(&priv->loader_drawable, target_sbc,
 420                                    ust, msc, sbc);
 421 }
 422
 423 static void
 424 dri3_copy_sub_buffer(__GLXDRIdrawable *pdraw, int x, int y,
 425                      int width, int height,
 426                      Bool flush)
 427 {
 428    struct dri3_drawable *priv = (struct dri3_drawable *) pdraw;
 429
 430    loader_dri3_copy_sub_buffer(&priv->loader_drawable, x, y,
 431                                width, height, flush);
 432 }
 433
 434 static void
 435 dri3_wait_x(struct glx_context *gc)
 436 {
 437    struct dri3_drawable *priv = (struct dri3_drawable *)
 438       GetGLXDRIDrawable(gc->currentDpy, gc->currentDrawable);
 439
 440    loader_dri3_wait_x(&priv->loader_drawable);
 441 }
 442
 443 static void
 444 dri3_wait_gl(struct glx_context *gc)
 445 {
 446    struct dri3_drawable *priv = (struct dri3_drawable *)
 447       GetGLXDRIDrawable(gc->currentDpy, gc->currentDrawable);
 448
 449    loader_dri3_wait_gl(&priv->loader_drawable);
 450 }
 451
 452 /**
 453  * Called by the driver when it needs to update the real front buffer with the
 454  * contents of its fake front buffer.
 455  */
 456 static void
 457 dri3_flush_front_buffer(__DRIdrawable *driDrawable, void *loaderPrivate)
 458 {
 459    struct loader_dri3_drawable *draw = loaderPrivate;
 460    struct dri3_drawable *pdraw = loader_drawable_to_dri3_drawable(draw);
 461    struct dri3_screen *psc;
 462
 463    if (!pdraw)
 464       return;
 465
 466    if (!pdraw->base.psc)
 467       return;
 468
 469    psc = (struct dri3_screen *) pdraw->base.psc;
 470
 471    (void) __glXInitialize(psc->base.dpy);
 472
 473    loader_dri3_flush(draw, __DRI2_FLUSH_DRAWABLE, __DRI2_THROTTLE_FLUSHFRONT);
 474
 475    loader_dri3_wait_gl(draw);
 476 }
 477
 478 /* The image loader extension record for DRI3
 479  */
 480 static const __DRIimageLoaderExtension imageLoaderExtension = {
 481    .base = { __DRI_IMAGE_LOADER, 1 },
 482
 483    .getBuffers          = loader_dri3_get_buffers,
 484    .flushFrontBuffer    = dri3_flush_front_buffer,
 485 };
 486
 487 const __DRIuseInvalidateExtension dri3UseInvalidate = {
 488    .base = { __DRI_USE_INVALIDATE, 1 }
 489 };
 490
 491 static const __DRIextension *loader_extensions[] = {
 492    &imageLoaderExtension.base,
 493    &systemTimeExtension.base,
 494    &dri3UseInvalidate.base,
 495    NULL
 496 };
 497
 498 /** dri3_swap_buffers
 499  *
 500  * Make the current back buffer visible using the present extension
 501  */
 502 static int64_t
 503 dri3_swap_buffers(__GLXDRIdrawable *pdraw, int64_t target_msc, int64_t divisor,
 504                   int64_t remainder, Bool flush)
 505 {
 506    struct dri3_drawable *priv = (struct dri3_drawable *) pdraw;
 507    unsigned flags = __DRI2_FLUSH_DRAWABLE;
 508
 509    if (flush)
 510       flags |= __DRI2_FLUSH_CONTEXT;
 511
 512    return loader_dri3_swap_buffers_msc(&priv->loader_drawable,
 513                                        target_msc, divisor, remainder,
 514                                        flags, false);
 515 }
 516
 517 static int
 518 dri3_get_buffer_age(__GLXDRIdrawable *pdraw)
 519 {
 520    struct dri3_drawable *priv = (struct dri3_drawable *)pdraw;
 521
 522    return loader_dri3_query_buffer_age(&priv->loader_drawable);
 523 }
 524
 525 /** dri3_destroy_screen
 526  */
 527 static void
 528 dri3_destroy_screen(struct glx_screen *base)
 529 {
 530    struct dri3_screen *psc = (struct dri3_screen *) base;
 531
 532    /* Free the direct rendering per screen data */
 533    (*psc->core->destroyScreen) (psc->driScreen);
 534    driDestroyConfigs(psc->driver_configs);
 535    close(psc->fd);
 536    free(psc);
 537 }
 538
 539 /** dri3_set_swap_interval
 540  *
 541  * Record the application swap interval specification,
 542  */
 543 static int
 544 dri3_set_swap_interval(__GLXDRIdrawable *pdraw, int interval)
 545 {
 546    struct dri3_drawable *priv =  (struct dri3_drawable *) pdraw;
 547    GLint vblank_mode = DRI_CONF_VBLANK_DEF_INTERVAL_1;
 548    struct dri3_screen *psc = (struct dri3_screen *) priv->base.psc;
 549
 550    if (psc->config)
 551       psc->config->configQueryi(psc->driScreen,
 552                                 "vblank_mode", &vblank_mode);
 553
 554    switch (vblank_mode) {
 555    case DRI_CONF_VBLANK_NEVER:
 556       if (interval != 0)
 557          return GLX_BAD_VALUE;
 558       break;
 559    case DRI_CONF_VBLANK_ALWAYS_SYNC:
 560       if (interval <= 0)
 561          return GLX_BAD_VALUE;
 562       break;
 563    default:
 564       break;
 565    }
 566
 567    loader_dri3_set_swap_interval(&priv->loader_drawable, interval);
 568
 569    return 0;
 570 }
 571
 572 /** dri3_get_swap_interval
 573  *
 574  * Return the stored swap interval
 575  */
 576 static int
 577 dri3_get_swap_interval(__GLXDRIdrawable *pdraw)
 578 {
 579    struct dri3_drawable *priv =  (struct dri3_drawable *) pdraw;
 580
 581   return priv->swap_interval;
 582 }
 583
 584 static void
 585 dri3_bind_tex_image(Display * dpy,
 586                     GLXDrawable drawable,
 587                     int buffer, const int *attrib_list)
 588 {
 589    struct glx_context *gc = __glXGetCurrentContext();
 590    struct dri3_context *pcp = (struct dri3_context *) gc;
 591    __GLXDRIdrawable *base = GetGLXDRIDrawable(dpy, drawable);
 592    struct dri3_drawable *pdraw = (struct dri3_drawable *) base;
 593    struct dri3_screen *psc;
 594
 595    if (pdraw != NULL) {
 596       psc = (struct dri3_screen *) base->psc;
 597
 598       (*psc->f->invalidate)(pdraw->loader_drawable.dri_drawable);
 599
 600       XSync(dpy, false);
 601
 602       (*psc->texBuffer->setTexBuffer2) (pcp->driContext,
 603                                         pdraw->base.textureTarget,
 604                                         pdraw->base.textureFormat,
 605                                         pdraw->loader_drawable.dri_drawable);
 606    }
 607 }
 608
 609 static void
 610 dri3_release_tex_image(Display * dpy, GLXDrawable drawable, int buffer)
 611 {
 612    struct glx_context *gc = __glXGetCurrentContext();
 613    struct dri3_context *pcp = (struct dri3_context *) gc;
 614    __GLXDRIdrawable *base = GetGLXDRIDrawable(dpy, drawable);
 615    struct dri3_drawable *pdraw = (struct dri3_drawable *) base;
 616    struct dri3_screen *psc;
 617
 618    if (pdraw != NULL) {
 619       psc = (struct dri3_screen *) base->psc;
 620
 621       if (psc->texBuffer->base.version >= 3 &&
 622           psc->texBuffer->releaseTexBuffer != NULL)
 623          (*psc->texBuffer->releaseTexBuffer) (pcp->driContext,
 624                                               pdraw->base.textureTarget,
 625                                               pdraw->loader_drawable.dri_drawable);
 626    }
 627 }
 628
 629 static const struct glx_context_vtable dri3_context_vtable = {
 630    .destroy             = dri3_destroy_context,
 631    .bind                = dri3_bind_context,
 632    .unbind              = dri3_unbind_context,
 633    .wait_gl             = dri3_wait_gl,
 634    .wait_x              = dri3_wait_x,
 635    .use_x_font          = DRI_glXUseXFont,
 636    .bind_tex_image      = dri3_bind_tex_image,
 637    .release_tex_image   = dri3_release_tex_image,
 638    .get_proc_address    = NULL,
 639 };
 640
 641 /** dri3_bind_extensions
 642  *
 643  * Enable all of the extensions supported on DRI3
 644  */
 645 static void
 646 dri3_bind_extensions(struct dri3_screen *psc, struct glx_display * priv,
 647                      const char *driverName)
 648 {
 649    const __DRIextension **extensions;
 650    unsigned mask;
 651    int i;
 652
 653    extensions = psc->core->getExtensions(psc->driScreen);
 654
 655    __glXEnableDirectExtension(&psc->base, "GLX_SGI_video_sync");
 656    __glXEnableDirectExtension(&psc->base, "GLX_SGI_swap_control");
 657    __glXEnableDirectExtension(&psc->base, "GLX_MESA_swap_control");
 658    __glXEnableDirectExtension(&psc->base, "GLX_SGI_make_current_read");
 659    __glXEnableDirectExtension(&psc->base, "GLX_INTEL_swap_event");
 660
 661    mask = psc->image_driver->getAPIMask(psc->driScreen);
 662
 663    __glXEnableDirectExtension(&psc->base, "GLX_ARB_create_context");
 664    __glXEnableDirectExtension(&psc->base, "GLX_ARB_create_context_profile");
 665
 666    if ((mask & (1 << __DRI_API_GLES2)) != 0)
 667       __glXEnableDirectExtension(&psc->base,
 668                                  "GLX_EXT_create_context_es2_profile");
 669
 670    for (i = 0; extensions[i]; i++) {
 671       /* when on a different gpu than the server, the server pixmaps
 672        * can have a tiling mode we can't read. Thus we can't create
 673        * a texture from them.
 674        */
 675       if (!psc->is_different_gpu &&
 676          (strcmp(extensions[i]->name, __DRI_TEX_BUFFER) == 0)) {
 677          psc->texBuffer = (__DRItexBufferExtension *) extensions[i];
 678          __glXEnableDirectExtension(&psc->base, "GLX_EXT_texture_from_pixmap");
 679       }
 680
 681       if ((strcmp(extensions[i]->name, __DRI2_FLUSH) == 0)) {
 682          psc->f = (__DRI2flushExtension *) extensions[i];
 683          /* internal driver extension, no GL extension exposed */
 684       }
 685
 686       if (strcmp(extensions[i]->name, __DRI_IMAGE) == 0)
 687          psc->image = (__DRIimageExtension *) extensions[i];
 688
 689       if ((strcmp(extensions[i]->name, __DRI2_CONFIG_QUERY) == 0))
 690          psc->config = (__DRI2configQueryExtension *) extensions[i];
 691
 692       if (strcmp(extensions[i]->name, __DRI2_ROBUSTNESS) == 0)
 693          __glXEnableDirectExtension(&psc->base,
 694                                     "GLX_ARB_create_context_robustness");
 695
 696       if (strcmp(extensions[i]->name, __DRI2_RENDERER_QUERY) == 0) {
 697          psc->rendererQuery = (__DRI2rendererQueryExtension *) extensions[i];
 698          __glXEnableDirectExtension(&psc->base, "GLX_MESA_query_renderer");
 699       }
 700    }
 701 }
 702
 703 static const struct glx_screen_vtable dri3_screen_vtable = {
 704    .create_context         = dri3_create_context,
 705    .create_context_attribs = dri3_create_context_attribs,
 706    .query_renderer_integer = dri3_query_renderer_integer,
 707    .query_renderer_string  = dri3_query_renderer_string,
 708 };
 709
 710 /** dri3_create_screen
 711  *
 712  * Initialize DRI3 on the specified screen.
 713  *
 714  * Opens the DRI device, locates the appropriate DRI driver
 715  * and loads that.
 716  *
 717  * Checks to see if the driver supports the necessary extensions
 718  *
 719  * Initializes the driver for the screen and sets up our structures
 720  */
 721
 722 static struct glx_screen *
 723 dri3_create_screen(int screen, struct glx_display * priv)
 724 {
 725    xcb_connection_t *c = XGetXCBConnection(priv->dpy);
 726    const __DRIconfig **driver_configs;
 727    const __DRIextension **extensions;
 728    const struct dri3_display *const pdp = (struct dri3_display *)
 729       priv->dri3Display;
 730    struct dri3_screen *psc;
 731    __GLXDRIscreen *psp;
 732    struct glx_config *configs = NULL, *visuals = NULL;
 733    char *driverName, *deviceName, *tmp;
 734    int i;
 735
 736    psc = calloc(1, sizeof *psc);
 737    if (psc == NULL)
 738       return NULL;
 739
 740    psc->fd = -1;
 741
 742    if (!glx_screen_init(&psc->base, screen, priv)) {
 743       free(psc);
 744       return NULL;
 745    }
 746
 747    psc->fd = loader_dri3_open(c, RootWindow(priv->dpy, screen), None);
 748    if (psc->fd < 0) {
 749       int conn_error = xcb_connection_has_error(c);
 750
 751       glx_screen_cleanup(&psc->base);
 752       free(psc);
 753       InfoMessageF("screen %d does not appear to be DRI3 capable\n", screen);
 754
 755       if (conn_error)
 756          ErrorMessageF("Connection closed during DRI3 initialization failure");
 757
 758       return NULL;
 759    }
 760
 761    psc->fd = loader_get_user_preferred_fd(psc->fd, &psc->is_different_gpu);
 762    deviceName = NULL;
 763
 764    driverName = loader_get_driver_for_fd(psc->fd, 0);
 765    if (!driverName) {
 766       ErrorMessageF("No driver found\n");
 767       goto handle_error;
 768    }
 769
 770    psc->driver = driOpenDriver(driverName);
 771    if (psc->driver == NULL) {
 772       ErrorMessageF("driver pointer missing\n");
 773       goto handle_error;
 774    }
 775
 776    extensions = driGetDriverExtensions(psc->driver, driverName);
 777    if (extensions == NULL)
 778       goto handle_error;
 779
 780    for (i = 0; extensions[i]; i++) {
 781       if (strcmp(extensions[i]->name, __DRI_CORE) == 0)
 782          psc->core = (__DRIcoreExtension *) extensions[i];
 783       if (strcmp(extensions[i]->name, __DRI_IMAGE_DRIVER) == 0)
 784          psc->image_driver = (__DRIimageDriverExtension *) extensions[i];
 785    }
 786
 787
 788    if (psc->core == NULL) {
 789       ErrorMessageF("core dri driver extension not found\n");
 790       goto handle_error;
 791    }
 792
 793    if (psc->image_driver == NULL) {
 794       ErrorMessageF("image driver extension not found\n");
 795       goto handle_error;
 796    }
 797
 798    psc->driScreen =
 799       psc->image_driver->createNewScreen2(screen, psc->fd,
 800                                           pdp->loader_extensions,
 801                                           extensions,
 802                                           &driver_configs, psc);
 803
 804    if (psc->driScreen == NULL) {
 805       ErrorMessageF("failed to create dri screen\n");
 806       goto handle_error;
 807    }
 808
 809    dri3_bind_extensions(psc, priv, driverName);
 810
 811    if (!psc->image || psc->image->base.version < 7 || !psc->image->createImageFromFds) {
 812       ErrorMessageF("Version 7 or imageFromFds image extension not found\n");
 813       goto handle_error;
 814    }
 815
 816    if (!psc->f || psc->f->base.version < 4) {
 817       ErrorMessageF("Version 4 or later of flush extension not found\n");
 818       goto handle_error;
 819    }
 820
 821    if (psc->is_different_gpu && psc->image->base.version < 9) {
 822       ErrorMessageF("Different GPU, but image extension version 9 or later not found\n");
 823       goto handle_error;
 824    }
 825
 826    if (psc->is_different_gpu && !psc->image->blitImage) {
 827       ErrorMessageF("Different GPU, but blitImage not implemented for this driver\n");
 828       goto handle_error;
 829    }
 830
 831    if (!psc->is_different_gpu && (
 832        !psc->texBuffer || psc->texBuffer->base.version < 2 ||
 833        !psc->texBuffer->setTexBuffer2
 834        )) {
 835       ErrorMessageF("Version 2 or later of texBuffer extension not found\n");
 836       goto handle_error;
 837    }
 838
 839    psc->loader_dri3_ext.core = psc->core;
 840    psc->loader_dri3_ext.image_driver = psc->image_driver;
 841    psc->loader_dri3_ext.flush = psc->f;
 842    psc->loader_dri3_ext.tex_buffer = psc->texBuffer;
 843    psc->loader_dri3_ext.image = psc->image;
 844    psc->loader_dri3_ext.config = psc->config;
 845
 846    configs = driConvertConfigs(psc->core, psc->base.configs, driver_configs);
 847    visuals = driConvertConfigs(psc->core, psc->base.visuals, driver_configs);
 848
 849    if (!configs || !visuals) {
 850        ErrorMessageF("No matching fbConfigs or visuals found\n");
 851        goto handle_error;
 852    }
 853
 854    glx_config_destroy_list(psc->base.configs);
 855    psc->base.configs = configs;
 856    glx_config_destroy_list(psc->base.visuals);
 857    psc->base.visuals = visuals;
 858
 859    psc->driver_configs = driver_configs;
 860
 861    psc->base.vtable = &dri3_screen_vtable;
 862    psp = &psc->vtable;
 863    psc->base.driScreen = psp;
 864    psp->destroyScreen = dri3_destroy_screen;
 865    psp->createDrawable = dri3_create_drawable;
 866    psp->swapBuffers = dri3_swap_buffers;
 867
 868    psp->getDrawableMSC = dri3_drawable_get_msc;
 869    psp->waitForMSC = dri3_wait_for_msc;
 870    psp->waitForSBC = dri3_wait_for_sbc;
 871    psp->setSwapInterval = dri3_set_swap_interval;
 872    psp->getSwapInterval = dri3_get_swap_interval;
 873    __glXEnableDirectExtension(&psc->base, "GLX_OML_sync_control");
 874
 875    psp->copySubBuffer = dri3_copy_sub_buffer;
 876    __glXEnableDirectExtension(&psc->base, "GLX_MESA_copy_sub_buffer");
 877
 878    psp->getBufferAge = dri3_get_buffer_age;
 879    __glXEnableDirectExtension(&psc->base, "GLX_EXT_buffer_age");
 880
 881    free(driverName);
 882    free(deviceName);
 883
 884    tmp = getenv("LIBGL_SHOW_FPS");
 885    psc->show_fps_interval = tmp ? atoi(tmp) : 0;
 886    if (psc->show_fps_interval < 0)
 887       psc->show_fps_interval = 0;
 888
 889    InfoMessageF("Using DRI3 for screen %d\n", screen);
 890
 891    return &psc->base;
 892
 893 handle_error:
 894    CriticalErrorMessageF("failed to load driver: %s\n", driverName);
 895
 896    if (configs)
 897        glx_config_destroy_list(configs);
 898    if (visuals)
 899        glx_config_destroy_list(visuals);
 900    if (psc->driScreen)
 901        psc->core->destroyScreen(psc->driScreen);
 902    psc->driScreen = NULL;
 903    if (psc->fd >= 0)
 904       close(psc->fd);
 905    if (psc->driver)
 906       dlclose(psc->driver);
 907
 908    free(driverName);
 909    free(deviceName);
 910    glx_screen_cleanup(&psc->base);
 911    free(psc);
 912
 913    return NULL;
 914 }
 915
 916 /** dri_destroy_display
 917  *
 918  * Called from __glXFreeDisplayPrivate.
 919  */
 920 static void
 921 dri3_destroy_display(__GLXDRIdisplay * dpy)
 922 {
 923    free(dpy);
 924 }
 925
 926 /** dri3_create_display
 927  *
 928  * Allocate, initialize and return a __DRIdisplayPrivate object.
 929  * This is called from __glXInitialize() when we are given a new
 930  * display pointer. This is public to that function, but hidden from
 931  * outside of libGL.
 932  */
 933 _X_HIDDEN __GLXDRIdisplay *
 934 dri3_create_display(Display * dpy)
 935 {
 936    struct dri3_display                  *pdp;
 937    xcb_connection_t                     *c = XGetXCBConnection(dpy);
 938    xcb_dri3_query_version_cookie_t      dri3_cookie;
 939    xcb_dri3_query_version_reply_t       *dri3_reply;
 940    xcb_present_query_version_cookie_t   present_cookie;
 941    xcb_present_query_version_reply_t    *present_reply;
 942    xcb_generic_error_t                  *error;
 943    const xcb_query_extension_reply_t    *extension;
 944
 945    xcb_prefetch_extension_data(c, &xcb_dri3_id);
 946    xcb_prefetch_extension_data(c, &xcb_present_id);
 947
 948    extension = xcb_get_extension_data(c, &xcb_dri3_id);
 949    if (!(extension && extension->present))
 950       return NULL;
 951
 952    extension = xcb_get_extension_data(c, &xcb_present_id);
 953    if (!(extension && extension->present))
 954       return NULL;
 955
 956    dri3_cookie = xcb_dri3_query_version(c,
 957                                         XCB_DRI3_MAJOR_VERSION,
 958                                         XCB_DRI3_MINOR_VERSION);
 959
 960
 961    present_cookie = xcb_present_query_version(c,
 962                                    XCB_PRESENT_MAJOR_VERSION,
 963                                    XCB_PRESENT_MINOR_VERSION);
 964
 965    pdp = malloc(sizeof *pdp);
 966    if (pdp == NULL)
 967       return NULL;
 968
 969    dri3_reply = xcb_dri3_query_version_reply(c, dri3_cookie, &error);
 970    if (!dri3_reply) {
 971       free(error);
 972       goto no_extension;
 973    }
 974
 975    pdp->dri3Major = dri3_reply->major_version;
 976    pdp->dri3Minor = dri3_reply->minor_version;
 977    free(dri3_reply);
 978
 979    present_reply = xcb_present_query_version_reply(c, present_cookie, &error);
 980    if (!present_reply) {
 981       free(error);
 982       goto no_extension;
 983    }
 984    pdp->presentMajor = present_reply->major_version;
 985    pdp->presentMinor = present_reply->minor_version;
 986    free(present_reply);
 987
 988    pdp->base.destroyDisplay = dri3_destroy_display;
 989    pdp->base.createScreen = dri3_create_screen;
 990
 991    loader_set_logger(dri_message);
 992
 993    pdp->loader_extensions = loader_extensions;
 994
 995    return &pdp->base;
 996 no_extension:
 997    free(pdp);
 998    return NULL;
 999 }
1000
1001 #endif /* GLX_DIRECT_RENDERING */