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 void
 136 glx_dri3_flush_drawable(struct loader_dri3_drawable *draw, unsigned flags)
 137 {
 138    loader_dri3_flush(draw, flags, __DRI2_THROTTLE_SWAPBUFFER);
 139 }
 140
 141 static void
 142 glx_dri3_show_fps(struct loader_dri3_drawable *draw, uint64_t current_ust)
 143 {
 144    struct dri3_drawable *priv = loader_drawable_to_dri3_drawable(draw);
 145    const uint64_t interval =
 146       ((struct dri3_screen *) priv->base.psc)->show_fps_interval;
 147
 148    if (!interval)
 149       return;
 150
 151    priv->frames++;
 152
 153    /* DRI3+Present together uses microseconds for UST. */
 154    if (priv->previous_ust + interval * 1000000 <= current_ust) {
 155       if (priv->previous_ust) {
 156          fprintf(stderr, "libGL: FPS = %.1f\n",
 157                  ((uint64_t) priv->frames * 1000000) /
 158                  (double)(current_ust - priv->previous_ust));
 159       }
 160       priv->frames = 0;
 161       priv->previous_ust = current_ust;
 162    }
 163 }
 164
 165 static struct loader_dri3_vtable glx_dri3_vtable = {
 166    .get_swap_interval = glx_dri3_get_swap_interval,
 167    .clamp_swap_interval = glx_dri3_clamp_swap_interval,
 168    .set_swap_interval = glx_dri3_set_swap_interval,
 169    .set_drawable_size = glx_dri3_set_drawable_size,
 170    .in_current_context = glx_dri3_in_current_context,
 171    .get_dri_context = glx_dri3_get_dri_context,
 172    .flush_drawable = glx_dri3_flush_drawable,
 173    .show_fps = glx_dri3_show_fps,
 174 };
 175
 176
 177 static const struct glx_context_vtable dri3_context_vtable;
 178
 179 static void
 180 dri3_destroy_context(struct glx_context *context)
 181 {
 182    struct dri3_context *pcp = (struct dri3_context *) context;
 183    struct dri3_screen *psc = (struct dri3_screen *) context->psc;
 184
 185    driReleaseDrawables(&pcp->base);
 186
 187    free((char *) context->extensions);
 188
 189    (*psc->core->destroyContext) (pcp->driContext);
 190
 191    free(pcp);
 192 }
 193
 194 static Bool
 195 dri3_bind_context(struct glx_context *context, struct glx_context *old,
 196                   GLXDrawable draw, GLXDrawable read)
 197 {
 198    struct dri3_context *pcp = (struct dri3_context *) context;
 199    struct dri3_screen *psc = (struct dri3_screen *) pcp->base.psc;
 200    struct dri3_drawable *pdraw, *pread;
 201
 202    pdraw = (struct dri3_drawable *) driFetchDrawable(context, draw);
 203    pread = (struct dri3_drawable *) driFetchDrawable(context, read);
 204
 205    driReleaseDrawables(&pcp->base);
 206
 207    if (pdraw == NULL || pread == NULL)
 208       return GLXBadDrawable;
 209
 210    if (!(*psc->core->bindContext) (pcp->driContext,
 211                                    pdraw->loader_drawable.dri_drawable,
 212                                    pread->loader_drawable.dri_drawable))
 213       return GLXBadContext;
 214
 215    return Success;
 216 }
 217
 218 static void
 219 dri3_unbind_context(struct glx_context *context, struct glx_context *new)
 220 {
 221    struct dri3_context *pcp = (struct dri3_context *) context;
 222    struct dri3_screen *psc = (struct dri3_screen *) pcp->base.psc;
 223
 224    (*psc->core->unbindContext) (pcp->driContext);
 225 }
 226
 227 static struct glx_context *
 228 dri3_create_context_attribs(struct glx_screen *base,
 229                             struct glx_config *config_base,
 230                             struct glx_context *shareList,
 231                             unsigned num_attribs,
 232                             const uint32_t *attribs,
 233                             unsigned *error)
 234 {
 235    struct dri3_context *pcp = NULL;
 236    struct dri3_context *pcp_shared = NULL;
 237    struct dri3_screen *psc = (struct dri3_screen *) base;
 238    __GLXDRIconfigPrivate *config = (__GLXDRIconfigPrivate *) config_base;
 239    __DRIcontext *shared = NULL;
 240
 241    uint32_t minor_ver = 1;
 242    uint32_t major_ver = 2;
 243    uint32_t flags = 0;
 244    unsigned api;
 245    int reset = __DRI_CTX_RESET_NO_NOTIFICATION;
 246    uint32_t ctx_attribs[2 * 5];
 247    unsigned num_ctx_attribs = 0;
 248    uint32_t render_type;
 249
 250    /* Remap the GLX tokens to DRI2 tokens.
 251     */
 252    if (!dri2_convert_glx_attribs(num_attribs, attribs,
 253                                  &major_ver, &minor_ver,
 254                                  &render_type, &flags, &api,
 255                                  &reset, error))
 256       goto error_exit;
 257
 258    /* Check the renderType value */
 259    if (!validate_renderType_against_config(config_base, render_type))
 260        goto error_exit;
 261
 262    if (shareList) {
 263       pcp_shared = (struct dri3_context *) shareList;
 264       shared = pcp_shared->driContext;
 265    }
 266
 267    pcp = calloc(1, sizeof *pcp);
 268    if (pcp == NULL) {
 269       *error = __DRI_CTX_ERROR_NO_MEMORY;
 270       goto error_exit;
 271    }
 272
 273    if (!glx_context_init(&pcp->base, &psc->base, &config->base))
 274       goto error_exit;
 275
 276    ctx_attribs[num_ctx_attribs++] = __DRI_CTX_ATTRIB_MAJOR_VERSION;
 277    ctx_attribs[num_ctx_attribs++] = major_ver;
 278    ctx_attribs[num_ctx_attribs++] = __DRI_CTX_ATTRIB_MINOR_VERSION;
 279    ctx_attribs[num_ctx_attribs++] = minor_ver;
 280
 281    /* Only send a value when the non-default value is requested.  By doing
 282     * this we don't have to check the driver's DRI3 version before sending the
 283     * default value.
 284     */
 285    if (reset != __DRI_CTX_RESET_NO_NOTIFICATION) {
 286       ctx_attribs[num_ctx_attribs++] = __DRI_CTX_ATTRIB_RESET_STRATEGY;
 287       ctx_attribs[num_ctx_attribs++] = reset;
 288    }
 289
 290    if (flags != 0) {
 291       ctx_attribs[num_ctx_attribs++] = __DRI_CTX_ATTRIB_FLAGS;
 292
 293       /* The current __DRI_CTX_FLAG_* values are identical to the
 294        * GLX_CONTEXT_*_BIT values.
 295        */
 296       ctx_attribs[num_ctx_attribs++] = flags;
 297    }
 298
 299    pcp->driContext =
 300       (*psc->image_driver->createContextAttribs) (psc->driScreen,
 301                                                   api,
 302                                                   config->driConfig,
 303                                                   shared,
 304                                                   num_ctx_attribs / 2,
 305                                                   ctx_attribs,
 306                                                   error,
 307                                                   pcp);
 308
 309    if (pcp->driContext == NULL)
 310       goto error_exit;
 311
 312    pcp->base.vtable = &dri3_context_vtable;
 313
 314    return &pcp->base;
 315
 316 error_exit:
 317    free(pcp);
 318
 319    return NULL;
 320 }
 321
 322 static struct glx_context *
 323 dri3_create_context(struct glx_screen *base,
 324                     struct glx_config *config_base,
 325                     struct glx_context *shareList, int renderType)
 326 {
 327    unsigned int error;
 328
 329    return dri3_create_context_attribs(base, config_base, shareList,
 330                                       0, NULL, &error);
 331 }
 332
 333 static void
 334 dri3_destroy_drawable(__GLXDRIdrawable *base)
 335 {
 336    struct dri3_drawable *pdraw = (struct dri3_drawable *) base;
 337
 338    loader_dri3_drawable_fini(&pdraw->loader_drawable);
 339
 340    free(pdraw);
 341 }
 342
 343 static __GLXDRIdrawable *
 344 dri3_create_drawable(struct glx_screen *base, XID xDrawable,
 345                      GLXDrawable drawable, struct glx_config *config_base)
 346 {
 347    struct dri3_drawable *pdraw;
 348    struct dri3_screen *psc = (struct dri3_screen *) base;
 349    __GLXDRIconfigPrivate *config = (__GLXDRIconfigPrivate *) config_base;
 350
 351    pdraw = calloc(1, sizeof(*pdraw));
 352    if (!pdraw)
 353       return NULL;
 354
 355    pdraw->base.destroyDrawable = dri3_destroy_drawable;
 356    pdraw->base.xDrawable = xDrawable;
 357    pdraw->base.drawable = drawable;
 358    pdraw->base.psc = &psc->base;
 359
 360    (void) __glXInitialize(psc->base.dpy);
 361
 362    if (loader_dri3_drawable_init(XGetXCBConnection(base->dpy),
 363                                  xDrawable, psc->driScreen,
 364                                  psc->is_different_gpu, config->driConfig,
 365                                  &psc->loader_dri3_ext, &glx_dri3_vtable,
 366                                  &pdraw->loader_drawable)) {
 367       free(pdraw);
 368       return NULL;
 369    }
 370
 371    return &pdraw->base;
 372 }
 373
 374 /** dri3_wait_for_msc
 375  *
 376  * Get the X server to send an event when the target msc/divisor/remainder is
 377  * reached.
 378  */
 379 static int
 380 dri3_wait_for_msc(__GLXDRIdrawable *pdraw, int64_t target_msc, int64_t divisor,
 381                   int64_t remainder, int64_t *ust, int64_t *msc, int64_t *sbc)
 382 {
 383    struct dri3_drawable *priv = (struct dri3_drawable *) pdraw;
 384
 385    loader_dri3_wait_for_msc(&priv->loader_drawable, target_msc, divisor,
 386                             remainder, ust, msc, sbc);
 387
 388    return 1;
 389 }
 390
 391 /** dri3_drawable_get_msc
 392  *
 393  * Return the current UST/MSC/SBC triplet by asking the server
 394  * for an event
 395  */
 396 static int
 397 dri3_drawable_get_msc(struct glx_screen *psc, __GLXDRIdrawable *pdraw,
 398                       int64_t *ust, int64_t *msc, int64_t *sbc)
 399 {
 400    return dri3_wait_for_msc(pdraw, 0, 0, 0, ust, msc,sbc);
 401 }
 402
 403 /** dri3_wait_for_sbc
 404  *
 405  * Wait for the completed swap buffer count to reach the specified
 406  * target. Presumably the application knows that this will be reached with
 407  * outstanding complete events, or we're going to be here awhile.
 408  */
 409 static int
 410 dri3_wait_for_sbc(__GLXDRIdrawable *pdraw, int64_t target_sbc, int64_t *ust,
 411                   int64_t *msc, int64_t *sbc)
 412 {
 413    struct dri3_drawable *priv = (struct dri3_drawable *) pdraw;
 414
 415    return loader_dri3_wait_for_sbc(&priv->loader_drawable, target_sbc,
 416                                    ust, msc, sbc);
 417 }
 418
 419 static void
 420 dri3_copy_sub_buffer(__GLXDRIdrawable *pdraw, int x, int y,
 421                      int width, int height,
 422                      Bool flush)
 423 {
 424    struct dri3_drawable *priv = (struct dri3_drawable *) pdraw;
 425
 426    loader_dri3_copy_sub_buffer(&priv->loader_drawable, x, y,
 427                                width, height, flush);
 428 }
 429
 430 static void
 431 dri3_wait_x(struct glx_context *gc)
 432 {
 433    struct dri3_drawable *priv = (struct dri3_drawable *)
 434       GetGLXDRIDrawable(gc->currentDpy, gc->currentDrawable);
 435
 436    if (priv)
 437       loader_dri3_wait_x(&priv->loader_drawable);
 438 }
 439
 440 static void
 441 dri3_wait_gl(struct glx_context *gc)
 442 {
 443    struct dri3_drawable *priv = (struct dri3_drawable *)
 444       GetGLXDRIDrawable(gc->currentDpy, gc->currentDrawable);
 445
 446    if (priv)
 447       loader_dri3_wait_gl(&priv->loader_drawable);
 448 }
 449
 450 /**
 451  * Called by the driver when it needs to update the real front buffer with the
 452  * contents of its fake front buffer.
 453  */
 454 static void
 455 dri3_flush_front_buffer(__DRIdrawable *driDrawable, void *loaderPrivate)
 456 {
 457    struct loader_dri3_drawable *draw = loaderPrivate;
 458    struct dri3_drawable *pdraw = loader_drawable_to_dri3_drawable(draw);
 459    struct dri3_screen *psc;
 460
 461    if (!pdraw)
 462       return;
 463
 464    if (!pdraw->base.psc)
 465       return;
 466
 467    psc = (struct dri3_screen *) pdraw->base.psc;
 468
 469    (void) __glXInitialize(psc->base.dpy);
 470
 471    loader_dri3_flush(draw, __DRI2_FLUSH_DRAWABLE, __DRI2_THROTTLE_FLUSHFRONT);
 472
 473    loader_dri3_wait_gl(draw);
 474 }
 475
 476 /* The image loader extension record for DRI3
 477  */
 478 static const __DRIimageLoaderExtension imageLoaderExtension = {
 479    .base = { __DRI_IMAGE_LOADER, 1 },
 480
 481    .getBuffers          = loader_dri3_get_buffers,
 482    .flushFrontBuffer    = dri3_flush_front_buffer,
 483 };
 484
 485 const __DRIuseInvalidateExtension dri3UseInvalidate = {
 486    .base = { __DRI_USE_INVALIDATE, 1 }
 487 };
 488
 489 static const __DRIextension *loader_extensions[] = {
 490    &imageLoaderExtension.base,
 491    &systemTimeExtension.base,
 492    &dri3UseInvalidate.base,
 493    NULL
 494 };
 495
 496 /** dri3_swap_buffers
 497  *
 498  * Make the current back buffer visible using the present extension
 499  */
 500 static int64_t
 501 dri3_swap_buffers(__GLXDRIdrawable *pdraw, int64_t target_msc, int64_t divisor,
 502                   int64_t remainder, Bool flush)
 503 {
 504    struct dri3_drawable *priv = (struct dri3_drawable *) pdraw;
 505    unsigned flags = __DRI2_FLUSH_DRAWABLE;
 506
 507    if (flush)
 508       flags |= __DRI2_FLUSH_CONTEXT;
 509
 510    return loader_dri3_swap_buffers_msc(&priv->loader_drawable,
 511                                        target_msc, divisor, remainder,
 512                                        flags, false);
 513 }
 514
 515 static int
 516 dri3_get_buffer_age(__GLXDRIdrawable *pdraw)
 517 {
 518    struct dri3_drawable *priv = (struct dri3_drawable *)pdraw;
 519
 520    return loader_dri3_query_buffer_age(&priv->loader_drawable);
 521 }
 522
 523 /** dri3_destroy_screen
 524  */
 525 static void
 526 dri3_destroy_screen(struct glx_screen *base)
 527 {
 528    struct dri3_screen *psc = (struct dri3_screen *) base;
 529
 530    /* Free the direct rendering per screen data */
 531    (*psc->core->destroyScreen) (psc->driScreen);
 532    driDestroyConfigs(psc->driver_configs);
 533    close(psc->fd);
 534    free(psc);
 535 }
 536
 537 /** dri3_set_swap_interval
 538  *
 539  * Record the application swap interval specification,
 540  */
 541 static int
 542 dri3_set_swap_interval(__GLXDRIdrawable *pdraw, int interval)
 543 {
 544    struct dri3_drawable *priv =  (struct dri3_drawable *) pdraw;
 545    GLint vblank_mode = DRI_CONF_VBLANK_DEF_INTERVAL_1;
 546    struct dri3_screen *psc = (struct dri3_screen *) priv->base.psc;
 547
 548    if (psc->config)
 549       psc->config->configQueryi(psc->driScreen,
 550                                 "vblank_mode", &vblank_mode);
 551
 552    switch (vblank_mode) {
 553    case DRI_CONF_VBLANK_NEVER:
 554       if (interval != 0)
 555          return GLX_BAD_VALUE;
 556       break;
 557    case DRI_CONF_VBLANK_ALWAYS_SYNC:
 558       if (interval <= 0)
 559          return GLX_BAD_VALUE;
 560       break;
 561    default:
 562       break;
 563    }
 564
 565    loader_dri3_set_swap_interval(&priv->loader_drawable, interval);
 566
 567    return 0;
 568 }
 569
 570 /** dri3_get_swap_interval
 571  *
 572  * Return the stored swap interval
 573  */
 574 static int
 575 dri3_get_swap_interval(__GLXDRIdrawable *pdraw)
 576 {
 577    struct dri3_drawable *priv =  (struct dri3_drawable *) pdraw;
 578
 579   return priv->swap_interval;
 580 }
 581
 582 static void
 583 dri3_bind_tex_image(Display * dpy,
 584                     GLXDrawable drawable,
 585                     int buffer, const int *attrib_list)
 586 {
 587    struct glx_context *gc = __glXGetCurrentContext();
 588    struct dri3_context *pcp = (struct dri3_context *) gc;
 589    __GLXDRIdrawable *base = GetGLXDRIDrawable(dpy, drawable);
 590    struct dri3_drawable *pdraw = (struct dri3_drawable *) base;
 591    struct dri3_screen *psc;
 592
 593    if (pdraw != NULL) {
 594       psc = (struct dri3_screen *) base->psc;
 595
 596       (*psc->f->invalidate)(pdraw->loader_drawable.dri_drawable);
 597
 598       XSync(dpy, false);
 599
 600       (*psc->texBuffer->setTexBuffer2) (pcp->driContext,
 601                                         pdraw->base.textureTarget,
 602                                         pdraw->base.textureFormat,
 603                                         pdraw->loader_drawable.dri_drawable);
 604    }
 605 }
 606
 607 static void
 608 dri3_release_tex_image(Display * dpy, GLXDrawable drawable, int buffer)
 609 {
 610    struct glx_context *gc = __glXGetCurrentContext();
 611    struct dri3_context *pcp = (struct dri3_context *) gc;
 612    __GLXDRIdrawable *base = GetGLXDRIDrawable(dpy, drawable);
 613    struct dri3_drawable *pdraw = (struct dri3_drawable *) base;
 614    struct dri3_screen *psc;
 615
 616    if (pdraw != NULL) {
 617       psc = (struct dri3_screen *) base->psc;
 618
 619       if (psc->texBuffer->base.version >= 3 &&
 620           psc->texBuffer->releaseTexBuffer != NULL)
 621          (*psc->texBuffer->releaseTexBuffer) (pcp->driContext,
 622                                               pdraw->base.textureTarget,
 623                                               pdraw->loader_drawable.dri_drawable);
 624    }
 625 }
 626
 627 static const struct glx_context_vtable dri3_context_vtable = {
 628    .destroy             = dri3_destroy_context,
 629    .bind                = dri3_bind_context,
 630    .unbind              = dri3_unbind_context,
 631    .wait_gl             = dri3_wait_gl,
 632    .wait_x              = dri3_wait_x,
 633    .use_x_font          = DRI_glXUseXFont,
 634    .bind_tex_image      = dri3_bind_tex_image,
 635    .release_tex_image   = dri3_release_tex_image,
 636    .get_proc_address    = NULL,
 637    .interop_query_device_info = dri3_interop_query_device_info,
 638    .interop_export_object = dri3_interop_export_object
 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_GLES) |
 667                 (1 << __DRI_API_GLES2) |
 668                 (1 << __DRI_API_GLES3))) != 0) {
 669       __glXEnableDirectExtension(&psc->base,
 670                                  "GLX_EXT_create_context_es_profile");
 671       __glXEnableDirectExtension(&psc->base,
 672                                  "GLX_EXT_create_context_es2_profile");
 673    }
 674
 675    for (i = 0; extensions[i]; i++) {
 676       /* when on a different gpu than the server, the server pixmaps
 677        * can have a tiling mode we can't read. Thus we can't create
 678        * a texture from them.
 679        */
 680       if (!psc->is_different_gpu &&
 681          (strcmp(extensions[i]->name, __DRI_TEX_BUFFER) == 0)) {
 682          psc->texBuffer = (__DRItexBufferExtension *) extensions[i];
 683          __glXEnableDirectExtension(&psc->base, "GLX_EXT_texture_from_pixmap");
 684       }
 685
 686       if ((strcmp(extensions[i]->name, __DRI2_FLUSH) == 0)) {
 687          psc->f = (__DRI2flushExtension *) extensions[i];
 688          /* internal driver extension, no GL extension exposed */
 689       }
 690
 691       if (strcmp(extensions[i]->name, __DRI_IMAGE) == 0)
 692          psc->image = (__DRIimageExtension *) extensions[i];
 693
 694       if ((strcmp(extensions[i]->name, __DRI2_CONFIG_QUERY) == 0))
 695          psc->config = (__DRI2configQueryExtension *) extensions[i];
 696
 697       if (strcmp(extensions[i]->name, __DRI2_ROBUSTNESS) == 0)
 698          __glXEnableDirectExtension(&psc->base,
 699                                     "GLX_ARB_create_context_robustness");
 700
 701       if (strcmp(extensions[i]->name, __DRI2_RENDERER_QUERY) == 0) {
 702          psc->rendererQuery = (__DRI2rendererQueryExtension *) extensions[i];
 703          __glXEnableDirectExtension(&psc->base, "GLX_MESA_query_renderer");
 704       }
 705
 706       if (strcmp(extensions[i]->name, __DRI2_INTEROP) == 0)
 707          psc->interop = (__DRI2interopExtension*)extensions[i];
 708    }
 709 }
 710
 711 static const struct glx_screen_vtable dri3_screen_vtable = {
 712    .create_context         = dri3_create_context,
 713    .create_context_attribs = dri3_create_context_attribs,
 714    .query_renderer_integer = dri3_query_renderer_integer,
 715    .query_renderer_string  = dri3_query_renderer_string,
 716 };
 717
 718 /** dri3_create_screen
 719  *
 720  * Initialize DRI3 on the specified screen.
 721  *
 722  * Opens the DRI device, locates the appropriate DRI driver
 723  * and loads that.
 724  *
 725  * Checks to see if the driver supports the necessary extensions
 726  *
 727  * Initializes the driver for the screen and sets up our structures
 728  */
 729
 730 static struct glx_screen *
 731 dri3_create_screen(int screen, struct glx_display * priv)
 732 {
 733    xcb_connection_t *c = XGetXCBConnection(priv->dpy);
 734    const __DRIconfig **driver_configs;
 735    const __DRIextension **extensions;
 736    const struct dri3_display *const pdp = (struct dri3_display *)
 737       priv->dri3Display;
 738    struct dri3_screen *psc;
 739    __GLXDRIscreen *psp;
 740    struct glx_config *configs = NULL, *visuals = NULL;
 741    char *driverName, *deviceName, *tmp;
 742    int i;
 743
 744    psc = calloc(1, sizeof *psc);
 745    if (psc == NULL)
 746       return NULL;
 747
 748    psc->fd = -1;
 749
 750    if (!glx_screen_init(&psc->base, screen, priv)) {
 751       free(psc);
 752       return NULL;
 753    }
 754
 755    psc->fd = loader_dri3_open(c, RootWindow(priv->dpy, screen), None);
 756    if (psc->fd < 0) {
 757       int conn_error = xcb_connection_has_error(c);
 758
 759       glx_screen_cleanup(&psc->base);
 760       free(psc);
 761       InfoMessageF("screen %d does not appear to be DRI3 capable\n", screen);
 762
 763       if (conn_error)
 764          ErrorMessageF("Connection closed during DRI3 initialization failure");
 765
 766       return NULL;
 767    }
 768
 769    psc->fd = loader_get_user_preferred_fd(psc->fd, &psc->is_different_gpu);
 770    deviceName = NULL;
 771
 772    driverName = loader_get_driver_for_fd(psc->fd, 0);
 773    if (!driverName) {
 774       ErrorMessageF("No driver found\n");
 775       goto handle_error;
 776    }
 777
 778    psc->driver = driOpenDriver(driverName);
 779    if (psc->driver == NULL) {
 780       ErrorMessageF("driver pointer missing\n");
 781       goto handle_error;
 782    }
 783
 784    extensions = driGetDriverExtensions(psc->driver, driverName);
 785    if (extensions == NULL)
 786       goto handle_error;
 787
 788    for (i = 0; extensions[i]; i++) {
 789       if (strcmp(extensions[i]->name, __DRI_CORE) == 0)
 790          psc->core = (__DRIcoreExtension *) extensions[i];
 791       if (strcmp(extensions[i]->name, __DRI_IMAGE_DRIVER) == 0)
 792          psc->image_driver = (__DRIimageDriverExtension *) extensions[i];
 793    }
 794
 795
 796    if (psc->core == NULL) {
 797       ErrorMessageF("core dri driver extension not found\n");
 798       goto handle_error;
 799    }
 800
 801    if (psc->image_driver == NULL) {
 802       ErrorMessageF("image driver extension not found\n");
 803       goto handle_error;
 804    }
 805
 806    psc->driScreen =
 807       psc->image_driver->createNewScreen2(screen, psc->fd,
 808                                           pdp->loader_extensions,
 809                                           extensions,
 810                                           &driver_configs, psc);
 811
 812    if (psc->driScreen == NULL) {
 813       ErrorMessageF("failed to create dri screen\n");
 814       goto handle_error;
 815    }
 816
 817    dri3_bind_extensions(psc, priv, driverName);
 818
 819    if (!psc->image || psc->image->base.version < 7 || !psc->image->createImageFromFds) {
 820       ErrorMessageF("Version 7 or imageFromFds image extension not found\n");
 821       goto handle_error;
 822    }
 823
 824    if (!psc->f || psc->f->base.version < 4) {
 825       ErrorMessageF("Version 4 or later of flush extension not found\n");
 826       goto handle_error;
 827    }
 828
 829    if (psc->is_different_gpu && psc->image->base.version < 9) {
 830       ErrorMessageF("Different GPU, but image extension version 9 or later not found\n");
 831       goto handle_error;
 832    }
 833
 834    if (psc->is_different_gpu && !psc->image->blitImage) {
 835       ErrorMessageF("Different GPU, but blitImage not implemented for this driver\n");
 836       goto handle_error;
 837    }
 838
 839    if (!psc->is_different_gpu && (
 840        !psc->texBuffer || psc->texBuffer->base.version < 2 ||
 841        !psc->texBuffer->setTexBuffer2
 842        )) {
 843       ErrorMessageF("Version 2 or later of texBuffer extension not found\n");
 844       goto handle_error;
 845    }
 846
 847    psc->loader_dri3_ext.core = psc->core;
 848    psc->loader_dri3_ext.image_driver = psc->image_driver;
 849    psc->loader_dri3_ext.flush = psc->f;
 850    psc->loader_dri3_ext.tex_buffer = psc->texBuffer;
 851    psc->loader_dri3_ext.image = psc->image;
 852    psc->loader_dri3_ext.config = psc->config;
 853
 854    configs = driConvertConfigs(psc->core, psc->base.configs, driver_configs);
 855    visuals = driConvertConfigs(psc->core, psc->base.visuals, driver_configs);
 856
 857    if (!configs || !visuals) {
 858        ErrorMessageF("No matching fbConfigs or visuals found\n");
 859        goto handle_error;
 860    }
 861
 862    glx_config_destroy_list(psc->base.configs);
 863    psc->base.configs = configs;
 864    glx_config_destroy_list(psc->base.visuals);
 865    psc->base.visuals = visuals;
 866
 867    psc->driver_configs = driver_configs;
 868
 869    psc->base.vtable = &dri3_screen_vtable;
 870    psp = &psc->vtable;
 871    psc->base.driScreen = psp;
 872    psp->destroyScreen = dri3_destroy_screen;
 873    psp->createDrawable = dri3_create_drawable;
 874    psp->swapBuffers = dri3_swap_buffers;
 875
 876    psp->getDrawableMSC = dri3_drawable_get_msc;
 877    psp->waitForMSC = dri3_wait_for_msc;
 878    psp->waitForSBC = dri3_wait_for_sbc;
 879    psp->setSwapInterval = dri3_set_swap_interval;
 880    psp->getSwapInterval = dri3_get_swap_interval;
 881    __glXEnableDirectExtension(&psc->base, "GLX_OML_sync_control");
 882
 883    psp->copySubBuffer = dri3_copy_sub_buffer;
 884    __glXEnableDirectExtension(&psc->base, "GLX_MESA_copy_sub_buffer");
 885
 886    psp->getBufferAge = dri3_get_buffer_age;
 887    __glXEnableDirectExtension(&psc->base, "GLX_EXT_buffer_age");
 888
 889    free(driverName);
 890    free(deviceName);
 891
 892    tmp = getenv("LIBGL_SHOW_FPS");
 893    psc->show_fps_interval = tmp ? atoi(tmp) : 0;
 894    if (psc->show_fps_interval < 0)
 895       psc->show_fps_interval = 0;
 896
 897    InfoMessageF("Using DRI3 for screen %d\n", screen);
 898
 899    return &psc->base;
 900
 901 handle_error:
 902    CriticalErrorMessageF("failed to load driver: %s\n", driverName);
 903
 904    if (configs)
 905        glx_config_destroy_list(configs);
 906    if (visuals)
 907        glx_config_destroy_list(visuals);
 908    if (psc->driScreen)
 909        psc->core->destroyScreen(psc->driScreen);
 910    psc->driScreen = NULL;
 911    if (psc->fd >= 0)
 912       close(psc->fd);
 913    if (psc->driver)
 914       dlclose(psc->driver);
 915
 916    free(driverName);
 917    free(deviceName);
 918    glx_screen_cleanup(&psc->base);
 919    free(psc);
 920
 921    return NULL;
 922 }
 923
 924 /** dri_destroy_display
 925  *
 926  * Called from __glXFreeDisplayPrivate.
 927  */
 928 static void
 929 dri3_destroy_display(__GLXDRIdisplay * dpy)
 930 {
 931    free(dpy);
 932 }
 933
 934 /** dri3_create_display
 935  *
 936  * Allocate, initialize and return a __DRIdisplayPrivate object.
 937  * This is called from __glXInitialize() when we are given a new
 938  * display pointer. This is public to that function, but hidden from
 939  * outside of libGL.
 940  */
 941 _X_HIDDEN __GLXDRIdisplay *
 942 dri3_create_display(Display * dpy)
 943 {
 944    struct dri3_display                  *pdp;
 945    xcb_connection_t                     *c = XGetXCBConnection(dpy);
 946    xcb_dri3_query_version_cookie_t      dri3_cookie;
 947    xcb_dri3_query_version_reply_t       *dri3_reply;
 948    xcb_present_query_version_cookie_t   present_cookie;
 949    xcb_present_query_version_reply_t    *present_reply;
 950    xcb_generic_error_t                  *error;
 951    const xcb_query_extension_reply_t    *extension;
 952
 953    xcb_prefetch_extension_data(c, &xcb_dri3_id);
 954    xcb_prefetch_extension_data(c, &xcb_present_id);
 955
 956    extension = xcb_get_extension_data(c, &xcb_dri3_id);
 957    if (!(extension && extension->present))
 958       return NULL;
 959
 960    extension = xcb_get_extension_data(c, &xcb_present_id);
 961    if (!(extension && extension->present))
 962       return NULL;
 963
 964    dri3_cookie = xcb_dri3_query_version(c,
 965                                         XCB_DRI3_MAJOR_VERSION,
 966                                         XCB_DRI3_MINOR_VERSION);
 967
 968
 969    present_cookie = xcb_present_query_version(c,
 970                                    XCB_PRESENT_MAJOR_VERSION,
 971                                    XCB_PRESENT_MINOR_VERSION);
 972
 973    pdp = malloc(sizeof *pdp);
 974    if (pdp == NULL)
 975       return NULL;
 976
 977    dri3_reply = xcb_dri3_query_version_reply(c, dri3_cookie, &error);
 978    if (!dri3_reply) {
 979       free(error);
 980       goto no_extension;
 981    }
 982
 983    pdp->dri3Major = dri3_reply->major_version;
 984    pdp->dri3Minor = dri3_reply->minor_version;
 985    free(dri3_reply);
 986
 987    present_reply = xcb_present_query_version_reply(c, present_cookie, &error);
 988    if (!present_reply) {
 989       free(error);
 990       goto no_extension;
 991    }
 992    pdp->presentMajor = present_reply->major_version;
 993    pdp->presentMinor = present_reply->minor_version;
 994    free(present_reply);
 995
 996    pdp->base.destroyDisplay = dri3_destroy_display;
 997    pdp->base.createScreen = dri3_create_screen;
 998
 999    loader_set_logger(dri_message);
1000
1001    pdp->loader_extensions = loader_extensions;
1002
1003    return &pdp->base;
1004 no_extension:
1005    free(pdp);
1006    return NULL;
1007 }
1008
1009 #endif /* GLX_DIRECT_RENDERING */