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    if (priv)
 441       loader_dri3_wait_x(&priv->loader_drawable);
 442 }
 443
 444 static void
 445 dri3_wait_gl(struct glx_context *gc)
 446 {
 447    struct dri3_drawable *priv = (struct dri3_drawable *)
 448       GetGLXDRIDrawable(gc->currentDpy, gc->currentDrawable);
 449
 450    if (priv)
 451       loader_dri3_wait_gl(&priv->loader_drawable);
 452 }
 453
 454 /**
 455  * Called by the driver when it needs to update the real front buffer with the
 456  * contents of its fake front buffer.
 457  */
 458 static void
 459 dri3_flush_front_buffer(__DRIdrawable *driDrawable, void *loaderPrivate)
 460 {
 461    struct loader_dri3_drawable *draw = loaderPrivate;
 462    struct dri3_drawable *pdraw = loader_drawable_to_dri3_drawable(draw);
 463    struct dri3_screen *psc;
 464
 465    if (!pdraw)
 466       return;
 467
 468    if (!pdraw->base.psc)
 469       return;
 470
 471    psc = (struct dri3_screen *) pdraw->base.psc;
 472
 473    (void) __glXInitialize(psc->base.dpy);
 474
 475    loader_dri3_flush(draw, __DRI2_FLUSH_DRAWABLE, __DRI2_THROTTLE_FLUSHFRONT);
 476
 477    loader_dri3_wait_gl(draw);
 478 }
 479
 480 /* The image loader extension record for DRI3
 481  */
 482 static const __DRIimageLoaderExtension imageLoaderExtension = {
 483    .base = { __DRI_IMAGE_LOADER, 1 },
 484
 485    .getBuffers          = loader_dri3_get_buffers,
 486    .flushFrontBuffer    = dri3_flush_front_buffer,
 487 };
 488
 489 const __DRIuseInvalidateExtension dri3UseInvalidate = {
 490    .base = { __DRI_USE_INVALIDATE, 1 }
 491 };
 492
 493 static const __DRIextension *loader_extensions[] = {
 494    &imageLoaderExtension.base,
 495    &systemTimeExtension.base,
 496    &dri3UseInvalidate.base,
 497    NULL
 498 };
 499
 500 /** dri3_swap_buffers
 501  *
 502  * Make the current back buffer visible using the present extension
 503  */
 504 static int64_t
 505 dri3_swap_buffers(__GLXDRIdrawable *pdraw, int64_t target_msc, int64_t divisor,
 506                   int64_t remainder, Bool flush)
 507 {
 508    struct dri3_drawable *priv = (struct dri3_drawable *) pdraw;
 509    unsigned flags = __DRI2_FLUSH_DRAWABLE;
 510
 511    if (flush)
 512       flags |= __DRI2_FLUSH_CONTEXT;
 513
 514    return loader_dri3_swap_buffers_msc(&priv->loader_drawable,
 515                                        target_msc, divisor, remainder,
 516                                        flags, false);
 517 }
 518
 519 static int
 520 dri3_get_buffer_age(__GLXDRIdrawable *pdraw)
 521 {
 522    struct dri3_drawable *priv = (struct dri3_drawable *)pdraw;
 523
 524    return loader_dri3_query_buffer_age(&priv->loader_drawable);
 525 }
 526
 527 /** dri3_destroy_screen
 528  */
 529 static void
 530 dri3_destroy_screen(struct glx_screen *base)
 531 {
 532    struct dri3_screen *psc = (struct dri3_screen *) base;
 533
 534    /* Free the direct rendering per screen data */
 535    (*psc->core->destroyScreen) (psc->driScreen);
 536    driDestroyConfigs(psc->driver_configs);
 537    close(psc->fd);
 538    free(psc);
 539 }
 540
 541 /** dri3_set_swap_interval
 542  *
 543  * Record the application swap interval specification,
 544  */
 545 static int
 546 dri3_set_swap_interval(__GLXDRIdrawable *pdraw, int interval)
 547 {
 548    struct dri3_drawable *priv =  (struct dri3_drawable *) pdraw;
 549    GLint vblank_mode = DRI_CONF_VBLANK_DEF_INTERVAL_1;
 550    struct dri3_screen *psc = (struct dri3_screen *) priv->base.psc;
 551
 552    if (psc->config)
 553       psc->config->configQueryi(psc->driScreen,
 554                                 "vblank_mode", &vblank_mode);
 555
 556    switch (vblank_mode) {
 557    case DRI_CONF_VBLANK_NEVER:
 558       if (interval != 0)
 559          return GLX_BAD_VALUE;
 560       break;
 561    case DRI_CONF_VBLANK_ALWAYS_SYNC:
 562       if (interval <= 0)
 563          return GLX_BAD_VALUE;
 564       break;
 565    default:
 566       break;
 567    }
 568
 569    loader_dri3_set_swap_interval(&priv->loader_drawable, interval);
 570
 571    return 0;
 572 }
 573
 574 /** dri3_get_swap_interval
 575  *
 576  * Return the stored swap interval
 577  */
 578 static int
 579 dri3_get_swap_interval(__GLXDRIdrawable *pdraw)
 580 {
 581    struct dri3_drawable *priv =  (struct dri3_drawable *) pdraw;
 582
 583   return priv->swap_interval;
 584 }
 585
 586 static void
 587 dri3_bind_tex_image(Display * dpy,
 588                     GLXDrawable drawable,
 589                     int buffer, const int *attrib_list)
 590 {
 591    struct glx_context *gc = __glXGetCurrentContext();
 592    struct dri3_context *pcp = (struct dri3_context *) gc;
 593    __GLXDRIdrawable *base = GetGLXDRIDrawable(dpy, drawable);
 594    struct dri3_drawable *pdraw = (struct dri3_drawable *) base;
 595    struct dri3_screen *psc;
 596
 597    if (pdraw != NULL) {
 598       psc = (struct dri3_screen *) base->psc;
 599
 600       (*psc->f->invalidate)(pdraw->loader_drawable.dri_drawable);
 601
 602       XSync(dpy, false);
 603
 604       (*psc->texBuffer->setTexBuffer2) (pcp->driContext,
 605                                         pdraw->base.textureTarget,
 606                                         pdraw->base.textureFormat,
 607                                         pdraw->loader_drawable.dri_drawable);
 608    }
 609 }
 610
 611 static void
 612 dri3_release_tex_image(Display * dpy, GLXDrawable drawable, int buffer)
 613 {
 614    struct glx_context *gc = __glXGetCurrentContext();
 615    struct dri3_context *pcp = (struct dri3_context *) gc;
 616    __GLXDRIdrawable *base = GetGLXDRIDrawable(dpy, drawable);
 617    struct dri3_drawable *pdraw = (struct dri3_drawable *) base;
 618    struct dri3_screen *psc;
 619
 620    if (pdraw != NULL) {
 621       psc = (struct dri3_screen *) base->psc;
 622
 623       if (psc->texBuffer->base.version >= 3 &&
 624           psc->texBuffer->releaseTexBuffer != NULL)
 625          (*psc->texBuffer->releaseTexBuffer) (pcp->driContext,
 626                                               pdraw->base.textureTarget,
 627                                               pdraw->loader_drawable.dri_drawable);
 628    }
 629 }
 630
 631 static const struct glx_context_vtable dri3_context_vtable = {
 632    .destroy             = dri3_destroy_context,
 633    .bind                = dri3_bind_context,
 634    .unbind              = dri3_unbind_context,
 635    .wait_gl             = dri3_wait_gl,
 636    .wait_x              = dri3_wait_x,
 637    .use_x_font          = DRI_glXUseXFont,
 638    .bind_tex_image      = dri3_bind_tex_image,
 639    .release_tex_image   = dri3_release_tex_image,
 640    .get_proc_address    = NULL,
 641 };
 642
 643 /** dri3_bind_extensions
 644  *
 645  * Enable all of the extensions supported on DRI3
 646  */
 647 static void
 648 dri3_bind_extensions(struct dri3_screen *psc, struct glx_display * priv,
 649                      const char *driverName)
 650 {
 651    const __DRIextension **extensions;
 652    unsigned mask;
 653    int i;
 654
 655    extensions = psc->core->getExtensions(psc->driScreen);
 656
 657    __glXEnableDirectExtension(&psc->base, "GLX_SGI_video_sync");
 658    __glXEnableDirectExtension(&psc->base, "GLX_SGI_swap_control");
 659    __glXEnableDirectExtension(&psc->base, "GLX_MESA_swap_control");
 660    __glXEnableDirectExtension(&psc->base, "GLX_SGI_make_current_read");
 661    __glXEnableDirectExtension(&psc->base, "GLX_INTEL_swap_event");
 662
 663    mask = psc->image_driver->getAPIMask(psc->driScreen);
 664
 665    __glXEnableDirectExtension(&psc->base, "GLX_ARB_create_context");
 666    __glXEnableDirectExtension(&psc->base, "GLX_ARB_create_context_profile");
 667
 668    if ((mask & ((1 << __DRI_API_GLES) |
 669                 (1 << __DRI_API_GLES2) |
 670                 (1 << __DRI_API_GLES3))) != 0) {
 671       __glXEnableDirectExtension(&psc->base,
 672                                  "GLX_EXT_create_context_es_profile");
 673       __glXEnableDirectExtension(&psc->base,
 674                                  "GLX_EXT_create_context_es2_profile");
 675    }
 676
 677    for (i = 0; extensions[i]; i++) {
 678       /* when on a different gpu than the server, the server pixmaps
 679        * can have a tiling mode we can't read. Thus we can't create
 680        * a texture from them.
 681        */
 682       if (!psc->is_different_gpu &&
 683          (strcmp(extensions[i]->name, __DRI_TEX_BUFFER) == 0)) {
 684          psc->texBuffer = (__DRItexBufferExtension *) extensions[i];
 685          __glXEnableDirectExtension(&psc->base, "GLX_EXT_texture_from_pixmap");
 686       }
 687
 688       if ((strcmp(extensions[i]->name, __DRI2_FLUSH) == 0)) {
 689          psc->f = (__DRI2flushExtension *) extensions[i];
 690          /* internal driver extension, no GL extension exposed */
 691       }
 692
 693       if (strcmp(extensions[i]->name, __DRI_IMAGE) == 0)
 694          psc->image = (__DRIimageExtension *) extensions[i];
 695
 696       if ((strcmp(extensions[i]->name, __DRI2_CONFIG_QUERY) == 0))
 697          psc->config = (__DRI2configQueryExtension *) extensions[i];
 698
 699       if (strcmp(extensions[i]->name, __DRI2_ROBUSTNESS) == 0)
 700          __glXEnableDirectExtension(&psc->base,
 701                                     "GLX_ARB_create_context_robustness");
 702
 703       if (strcmp(extensions[i]->name, __DRI2_RENDERER_QUERY) == 0) {
 704          psc->rendererQuery = (__DRI2rendererQueryExtension *) extensions[i];
 705          __glXEnableDirectExtension(&psc->base, "GLX_MESA_query_renderer");
 706       }
 707    }
 708 }
 709
 710 static const struct glx_screen_vtable dri3_screen_vtable = {
 711    .create_context         = dri3_create_context,
 712    .create_context_attribs = dri3_create_context_attribs,
 713    .query_renderer_integer = dri3_query_renderer_integer,
 714    .query_renderer_string  = dri3_query_renderer_string,
 715 };
 716
 717 /** dri3_create_screen
 718  *
 719  * Initialize DRI3 on the specified screen.
 720  *
 721  * Opens the DRI device, locates the appropriate DRI driver
 722  * and loads that.
 723  *
 724  * Checks to see if the driver supports the necessary extensions
 725  *
 726  * Initializes the driver for the screen and sets up our structures
 727  */
 728
 729 static struct glx_screen *
 730 dri3_create_screen(int screen, struct glx_display * priv)
 731 {
 732    xcb_connection_t *c = XGetXCBConnection(priv->dpy);
 733    const __DRIconfig **driver_configs;
 734    const __DRIextension **extensions;
 735    const struct dri3_display *const pdp = (struct dri3_display *)
 736       priv->dri3Display;
 737    struct dri3_screen *psc;
 738    __GLXDRIscreen *psp;
 739    struct glx_config *configs = NULL, *visuals = NULL;
 740    char *driverName, *deviceName, *tmp;
 741    int i;
 742
 743    psc = calloc(1, sizeof *psc);
 744    if (psc == NULL)
 745       return NULL;
 746
 747    psc->fd = -1;
 748
 749    if (!glx_screen_init(&psc->base, screen, priv)) {
 750       free(psc);
 751       return NULL;
 752    }
 753
 754    psc->fd = loader_dri3_open(c, RootWindow(priv->dpy, screen), None);
 755    if (psc->fd < 0) {
 756       int conn_error = xcb_connection_has_error(c);
 757
 758       glx_screen_cleanup(&psc->base);
 759       free(psc);
 760       InfoMessageF("screen %d does not appear to be DRI3 capable\n", screen);
 761
 762       if (conn_error)
 763          ErrorMessageF("Connection closed during DRI3 initialization failure");
 764
 765       return NULL;
 766    }
 767
 768    psc->fd = loader_get_user_preferred_fd(psc->fd, &psc->is_different_gpu);
 769    deviceName = NULL;
 770
 771    driverName = loader_get_driver_for_fd(psc->fd, 0);
 772    if (!driverName) {
 773       ErrorMessageF("No driver found\n");
 774       goto handle_error;
 775    }
 776
 777    psc->driver = driOpenDriver(driverName);
 778    if (psc->driver == NULL) {
 779       ErrorMessageF("driver pointer missing\n");
 780       goto handle_error;
 781    }
 782
 783    extensions = driGetDriverExtensions(psc->driver, driverName);
 784    if (extensions == NULL)
 785       goto handle_error;
 786
 787    for (i = 0; extensions[i]; i++) {
 788       if (strcmp(extensions[i]->name, __DRI_CORE) == 0)
 789          psc->core = (__DRIcoreExtension *) extensions[i];
 790       if (strcmp(extensions[i]->name, __DRI_IMAGE_DRIVER) == 0)
 791          psc->image_driver = (__DRIimageDriverExtension *) extensions[i];
 792    }
 793
 794
 795    if (psc->core == NULL) {
 796       ErrorMessageF("core dri driver extension not found\n");
 797       goto handle_error;
 798    }
 799
 800    if (psc->image_driver == NULL) {
 801       ErrorMessageF("image driver extension not found\n");
 802       goto handle_error;
 803    }
 804
 805    psc->driScreen =
 806       psc->image_driver->createNewScreen2(screen, psc->fd,
 807                                           pdp->loader_extensions,
 808                                           extensions,
 809                                           &driver_configs, psc);
 810
 811    if (psc->driScreen == NULL) {
 812       ErrorMessageF("failed to create dri screen\n");
 813       goto handle_error;
 814    }
 815
 816    dri3_bind_extensions(psc, priv, driverName);
 817
 818    if (!psc->image || psc->image->base.version < 7 || !psc->image->createImageFromFds) {
 819       ErrorMessageF("Version 7 or imageFromFds image extension not found\n");
 820       goto handle_error;
 821    }
 822
 823    if (!psc->f || psc->f->base.version < 4) {
 824       ErrorMessageF("Version 4 or later of flush extension not found\n");
 825       goto handle_error;
 826    }
 827
 828    if (psc->is_different_gpu && psc->image->base.version < 9) {
 829       ErrorMessageF("Different GPU, but image extension version 9 or later not found\n");
 830       goto handle_error;
 831    }
 832
 833    if (psc->is_different_gpu && !psc->image->blitImage) {
 834       ErrorMessageF("Different GPU, but blitImage not implemented for this driver\n");
 835       goto handle_error;
 836    }
 837
 838    if (!psc->is_different_gpu && (
 839        !psc->texBuffer || psc->texBuffer->base.version < 2 ||
 840        !psc->texBuffer->setTexBuffer2
 841        )) {
 842       ErrorMessageF("Version 2 or later of texBuffer extension not found\n");
 843       goto handle_error;
 844    }
 845
 846    psc->loader_dri3_ext.core = psc->core;
 847    psc->loader_dri3_ext.image_driver = psc->image_driver;
 848    psc->loader_dri3_ext.flush = psc->f;
 849    psc->loader_dri3_ext.tex_buffer = psc->texBuffer;
 850    psc->loader_dri3_ext.image = psc->image;
 851    psc->loader_dri3_ext.config = psc->config;
 852
 853    configs = driConvertConfigs(psc->core, psc->base.configs, driver_configs);
 854    visuals = driConvertConfigs(psc->core, psc->base.visuals, driver_configs);
 855
 856    if (!configs || !visuals) {
 857        ErrorMessageF("No matching fbConfigs or visuals found\n");
 858        goto handle_error;
 859    }
 860
 861    glx_config_destroy_list(psc->base.configs);
 862    psc->base.configs = configs;
 863    glx_config_destroy_list(psc->base.visuals);
 864    psc->base.visuals = visuals;
 865
 866    psc->driver_configs = driver_configs;
 867
 868    psc->base.vtable = &dri3_screen_vtable;
 869    psp = &psc->vtable;
 870    psc->base.driScreen = psp;
 871    psp->destroyScreen = dri3_destroy_screen;
 872    psp->createDrawable = dri3_create_drawable;
 873    psp->swapBuffers = dri3_swap_buffers;
 874
 875    psp->getDrawableMSC = dri3_drawable_get_msc;
 876    psp->waitForMSC = dri3_wait_for_msc;
 877    psp->waitForSBC = dri3_wait_for_sbc;
 878    psp->setSwapInterval = dri3_set_swap_interval;
 879    psp->getSwapInterval = dri3_get_swap_interval;
 880    __glXEnableDirectExtension(&psc->base, "GLX_OML_sync_control");
 881
 882    psp->copySubBuffer = dri3_copy_sub_buffer;
 883    __glXEnableDirectExtension(&psc->base, "GLX_MESA_copy_sub_buffer");
 884
 885    psp->getBufferAge = dri3_get_buffer_age;
 886    __glXEnableDirectExtension(&psc->base, "GLX_EXT_buffer_age");
 887
 888    free(driverName);
 889    free(deviceName);
 890
 891    tmp = getenv("LIBGL_SHOW_FPS");
 892    psc->show_fps_interval = tmp ? atoi(tmp) : 0;
 893    if (psc->show_fps_interval < 0)
 894       psc->show_fps_interval = 0;
 895
 896    InfoMessageF("Using DRI3 for screen %d\n", screen);
 897
 898    return &psc->base;
 899
 900 handle_error:
 901    CriticalErrorMessageF("failed to load driver: %s\n", driverName);
 902
 903    if (configs)
 904        glx_config_destroy_list(configs);
 905    if (visuals)
 906        glx_config_destroy_list(visuals);
 907    if (psc->driScreen)
 908        psc->core->destroyScreen(psc->driScreen);
 909    psc->driScreen = NULL;
 910    if (psc->fd >= 0)
 911       close(psc->fd);
 912    if (psc->driver)
 913       dlclose(psc->driver);
 914
 915    free(driverName);
 916    free(deviceName);
 917    glx_screen_cleanup(&psc->base);
 918    free(psc);
 919
 920    return NULL;
 921 }
 922
 923 /** dri_destroy_display
 924  *
 925  * Called from __glXFreeDisplayPrivate.
 926  */
 927 static void
 928 dri3_destroy_display(__GLXDRIdisplay * dpy)
 929 {
 930    free(dpy);
 931 }
 932
 933 /** dri3_create_display
 934  *
 935  * Allocate, initialize and return a __DRIdisplayPrivate object.
 936  * This is called from __glXInitialize() when we are given a new
 937  * display pointer. This is public to that function, but hidden from
 938  * outside of libGL.
 939  */
 940 _X_HIDDEN __GLXDRIdisplay *
 941 dri3_create_display(Display * dpy)
 942 {
 943    struct dri3_display                  *pdp;
 944    xcb_connection_t                     *c = XGetXCBConnection(dpy);
 945    xcb_dri3_query_version_cookie_t      dri3_cookie;
 946    xcb_dri3_query_version_reply_t       *dri3_reply;
 947    xcb_present_query_version_cookie_t   present_cookie;
 948    xcb_present_query_version_reply_t    *present_reply;
 949    xcb_generic_error_t                  *error;
 950    const xcb_query_extension_reply_t    *extension;
 951
 952    xcb_prefetch_extension_data(c, &xcb_dri3_id);
 953    xcb_prefetch_extension_data(c, &xcb_present_id);
 954
 955    extension = xcb_get_extension_data(c, &xcb_dri3_id);
 956    if (!(extension && extension->present))
 957       return NULL;
 958
 959    extension = xcb_get_extension_data(c, &xcb_present_id);
 960    if (!(extension && extension->present))
 961       return NULL;
 962
 963    dri3_cookie = xcb_dri3_query_version(c,
 964                                         XCB_DRI3_MAJOR_VERSION,
 965                                         XCB_DRI3_MINOR_VERSION);
 966
 967
 968    present_cookie = xcb_present_query_version(c,
 969                                    XCB_PRESENT_MAJOR_VERSION,
 970                                    XCB_PRESENT_MINOR_VERSION);
 971
 972    pdp = malloc(sizeof *pdp);
 973    if (pdp == NULL)
 974       return NULL;
 975
 976    dri3_reply = xcb_dri3_query_version_reply(c, dri3_cookie, &error);
 977    if (!dri3_reply) {
 978       free(error);
 979       goto no_extension;
 980    }
 981
 982    pdp->dri3Major = dri3_reply->major_version;
 983    pdp->dri3Minor = dri3_reply->minor_version;
 984    free(dri3_reply);
 985
 986    present_reply = xcb_present_query_version_reply(c, present_cookie, &error);
 987    if (!present_reply) {
 988       free(error);
 989       goto no_extension;
 990    }
 991    pdp->presentMajor = present_reply->major_version;
 992    pdp->presentMinor = present_reply->minor_version;
 993    free(present_reply);
 994
 995    pdp->base.destroyDisplay = dri3_destroy_display;
 996    pdp->base.createScreen = dri3_create_screen;
 997
 998    loader_set_logger(dri_message);
 999
1000    pdp->loader_extensions = loader_extensions;
1001
1002    return &pdp->base;
1003 no_extension:
1004    free(pdp);
1005    return NULL;
1006 }
1007
1008 #endif /* GLX_DIRECT_RENDERING */