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