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    if (!draw)
  85       return NULL;
  86    return (struct dri3_drawable *)(((void*) draw) - offset);
  87 }
  88
  89 static void
  90 glx_dri3_set_drawable_size(struct loader_dri3_drawable *draw,
  91                            int width, int height)
  92 {
  93    /* Nothing to do */
  94 }
  95
  96 static bool
  97 glx_dri3_in_current_context(struct loader_dri3_drawable *draw)
  98 {
  99    struct dri3_drawable *priv = loader_drawable_to_dri3_drawable(draw);
 100
 101    if (!priv)
 102       return false;
 103
 104    struct dri3_context *pcp = (struct dri3_context *) __glXGetCurrentContext();
 105    struct dri3_screen *psc = (struct dri3_screen *) priv->base.psc;
 106
 107    return (&pcp->base != &dummyContext) && pcp->base.psc == &psc->base;
 108 }
 109
 110 static __DRIcontext *
 111 glx_dri3_get_dri_context(struct loader_dri3_drawable *draw)
 112 {
 113    struct glx_context *gc = __glXGetCurrentContext();
 114    struct dri3_context *dri3Ctx = (struct dri3_context *) gc;
 115
 116    return (gc != &dummyContext) ? dri3Ctx->driContext : NULL;
 117 }
 118
 119 static __DRIscreen *
 120 glx_dri3_get_dri_screen(void)
 121 {
 122    struct glx_context *gc = __glXGetCurrentContext();
 123    struct dri3_context *pcp = (struct dri3_context *) gc;
 124    struct dri3_screen *psc = (struct dri3_screen *) pcp->base.psc;
 125
 126    return (gc != &dummyContext && psc) ? psc->driScreen : NULL;
 127 }
 128
 129 static void
 130 glx_dri3_flush_drawable(struct loader_dri3_drawable *draw, unsigned flags)
 131 {
 132    loader_dri3_flush(draw, flags, __DRI2_THROTTLE_SWAPBUFFER);
 133 }
 134
 135 static void
 136 glx_dri3_show_fps(struct loader_dri3_drawable *draw, uint64_t current_ust)
 137 {
 138    struct dri3_drawable *priv = loader_drawable_to_dri3_drawable(draw);
 139    const uint64_t interval =
 140       ((struct dri3_screen *) priv->base.psc)->show_fps_interval;
 141
 142    if (!interval)
 143       return;
 144
 145    priv->frames++;
 146
 147    /* DRI3+Present together uses microseconds for UST. */
 148    if (priv->previous_ust + interval * 1000000 <= current_ust) {
 149       if (priv->previous_ust) {
 150          fprintf(stderr, "libGL: FPS = %.1f\n",
 151                  ((uint64_t) priv->frames * 1000000) /
 152                  (double)(current_ust - priv->previous_ust));
 153       }
 154       priv->frames = 0;
 155       priv->previous_ust = current_ust;
 156    }
 157 }
 158
 159 static const struct loader_dri3_vtable glx_dri3_vtable = {
 160    .set_drawable_size = glx_dri3_set_drawable_size,
 161    .in_current_context = glx_dri3_in_current_context,
 162    .get_dri_context = glx_dri3_get_dri_context,
 163    .get_dri_screen = glx_dri3_get_dri_screen,
 164    .flush_drawable = glx_dri3_flush_drawable,
 165    .show_fps = glx_dri3_show_fps,
 166 };
 167
 168
 169 static const struct glx_context_vtable dri3_context_vtable;
 170
 171 static void
 172 dri3_destroy_context(struct glx_context *context)
 173 {
 174    struct dri3_context *pcp = (struct dri3_context *) context;
 175    struct dri3_screen *psc = (struct dri3_screen *) context->psc;
 176
 177    driReleaseDrawables(&pcp->base);
 178
 179    free((char *) context->extensions);
 180
 181    (*psc->core->destroyContext) (pcp->driContext);
 182
 183    free(pcp);
 184 }
 185
 186 static Bool
 187 dri3_bind_context(struct glx_context *context, struct glx_context *old,
 188                   GLXDrawable draw, GLXDrawable read)
 189 {
 190    struct dri3_context *pcp = (struct dri3_context *) context;
 191    struct dri3_screen *psc = (struct dri3_screen *) pcp->base.psc;
 192    struct dri3_drawable *pdraw, *pread;
 193    __DRIdrawable *dri_draw = NULL, *dri_read = NULL;
 194
 195    pdraw = (struct dri3_drawable *) driFetchDrawable(context, draw);
 196    pread = (struct dri3_drawable *) driFetchDrawable(context, read);
 197
 198    driReleaseDrawables(&pcp->base);
 199
 200    if (pdraw)
 201       dri_draw = pdraw->loader_drawable.dri_drawable;
 202    else if (draw != None)
 203       return GLXBadDrawable;
 204
 205    if (pread)
 206       dri_read = pread->loader_drawable.dri_drawable;
 207    else if (read != None)
 208       return GLXBadDrawable;
 209
 210    if (!(*psc->core->bindContext) (pcp->driContext, dri_draw, dri_read))
 211       return GLXBadContext;
 212
 213    if (dri_draw)
 214       psc->f->invalidate(dri_draw);
 215    if (dri_read && dri_read != dri_draw)
 216       psc->f->invalidate(dri_read);
 217
 218    return Success;
 219 }
 220
 221 static void
 222 dri3_unbind_context(struct glx_context *context, struct glx_context *new)
 223 {
 224    struct dri3_context *pcp = (struct dri3_context *) context;
 225    struct dri3_screen *psc = (struct dri3_screen *) pcp->base.psc;
 226
 227    (*psc->core->unbindContext) (pcp->driContext);
 228 }
 229
 230 static struct glx_context *
 231 dri3_create_context_attribs(struct glx_screen *base,
 232                             struct glx_config *config_base,
 233                             struct glx_context *shareList,
 234                             unsigned num_attribs,
 235                             const uint32_t *attribs,
 236                             unsigned *error)
 237 {
 238    struct dri3_context *pcp = NULL;
 239    struct dri3_context *pcp_shared = NULL;
 240    struct dri3_screen *psc = (struct dri3_screen *) base;
 241    __GLXDRIconfigPrivate *config = (__GLXDRIconfigPrivate *) config_base;
 242    __DRIcontext *shared = NULL;
 243
 244    uint32_t minor_ver = 1;
 245    uint32_t major_ver = 2;
 246    uint32_t flags = 0;
 247    unsigned api;
 248    int reset = __DRI_CTX_RESET_NO_NOTIFICATION;
 249    int release = __DRI_CTX_RELEASE_BEHAVIOR_FLUSH;
 250    uint32_t ctx_attribs[2 * 6];
 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, &release, error))
 260       goto error_exit;
 261
 262    if (!dri2_check_no_error(flags, shareList, major_ver, error)) {
 263       goto error_exit;
 264    }
 265
 266    /* Check the renderType value */
 267    if (!validate_renderType_against_config(config_base, render_type))
 268        goto error_exit;
 269
 270    if (shareList) {
 271       pcp_shared = (struct dri3_context *) shareList;
 272       shared = pcp_shared->driContext;
 273    }
 274
 275    pcp = calloc(1, sizeof *pcp);
 276    if (pcp == NULL) {
 277       *error = __DRI_CTX_ERROR_NO_MEMORY;
 278       goto error_exit;
 279    }
 280
 281    if (!glx_context_init(&pcp->base, &psc->base, config_base))
 282       goto error_exit;
 283
 284    ctx_attribs[num_ctx_attribs++] = __DRI_CTX_ATTRIB_MAJOR_VERSION;
 285    ctx_attribs[num_ctx_attribs++] = major_ver;
 286    ctx_attribs[num_ctx_attribs++] = __DRI_CTX_ATTRIB_MINOR_VERSION;
 287    ctx_attribs[num_ctx_attribs++] = minor_ver;
 288
 289    /* Only send a value when the non-default value is requested.  By doing
 290     * this we don't have to check the driver's DRI3 version before sending the
 291     * default value.
 292     */
 293    if (reset != __DRI_CTX_RESET_NO_NOTIFICATION) {
 294       ctx_attribs[num_ctx_attribs++] = __DRI_CTX_ATTRIB_RESET_STRATEGY;
 295       ctx_attribs[num_ctx_attribs++] = reset;
 296    }
 297
 298    if (release != __DRI_CTX_RELEASE_BEHAVIOR_FLUSH) {
 299       ctx_attribs[num_ctx_attribs++] = __DRI_CTX_ATTRIB_RELEASE_BEHAVIOR;
 300       ctx_attribs[num_ctx_attribs++] = release;
 301    }
 302
 303    if (flags != 0) {
 304       ctx_attribs[num_ctx_attribs++] = __DRI_CTX_ATTRIB_FLAGS;
 305
 306       /* The current __DRI_CTX_FLAG_* values are identical to the
 307        * GLX_CONTEXT_*_BIT values.
 308        */
 309       ctx_attribs[num_ctx_attribs++] = flags;
 310
 311       if (flags & __DRI_CTX_FLAG_NO_ERROR)
 312          pcp->base.noError = GL_TRUE;
 313    }
 314
 315    pcp->driContext =
 316       (*psc->image_driver->createContextAttribs) (psc->driScreen,
 317                                                   api,
 318                                                   config ? config->driConfig
 319                                                          : NULL,
 320                                                   shared,
 321                                                   num_ctx_attribs / 2,
 322                                                   ctx_attribs,
 323                                                   error,
 324                                                   pcp);
 325
 326    if (pcp->driContext == NULL)
 327       goto error_exit;
 328
 329    pcp->base.vtable = &dri3_context_vtable;
 330
 331    return &pcp->base;
 332
 333 error_exit:
 334    free(pcp);
 335
 336    return NULL;
 337 }
 338
 339 static struct glx_context *
 340 dri3_create_context(struct glx_screen *base,
 341                     struct glx_config *config_base,
 342                     struct glx_context *shareList, int renderType)
 343 {
 344    unsigned int error;
 345    uint32_t attribs[2] = { GLX_RENDER_TYPE, renderType };
 346
 347    return dri3_create_context_attribs(base, config_base, shareList,
 348                                       1, attribs, &error);
 349 }
 350
 351 static void
 352 dri3_destroy_drawable(__GLXDRIdrawable *base)
 353 {
 354    struct dri3_drawable *pdraw = (struct dri3_drawable *) base;
 355
 356    loader_dri3_drawable_fini(&pdraw->loader_drawable);
 357
 358    free(pdraw);
 359 }
 360
 361 static __GLXDRIdrawable *
 362 dri3_create_drawable(struct glx_screen *base, XID xDrawable,
 363                      GLXDrawable drawable, struct glx_config *config_base)
 364 {
 365    struct dri3_drawable *pdraw;
 366    struct dri3_screen *psc = (struct dri3_screen *) base;
 367    __GLXDRIconfigPrivate *config = (__GLXDRIconfigPrivate *) config_base;
 368    bool has_multibuffer = false;
 369 #ifdef HAVE_DRI3_MODIFIERS
 370    const struct dri3_display *const pdp = (struct dri3_display *)
 371       base->display->dri3Display;
 372 #endif
 373
 374    pdraw = calloc(1, sizeof(*pdraw));
 375    if (!pdraw)
 376       return NULL;
 377
 378    pdraw->base.destroyDrawable = dri3_destroy_drawable;
 379    pdraw->base.xDrawable = xDrawable;
 380    pdraw->base.drawable = drawable;
 381    pdraw->base.psc = &psc->base;
 382
 383 #ifdef HAVE_DRI3_MODIFIERS
 384    if ((psc->image && psc->image->base.version >= 15) &&
 385        (pdp->dri3Major > 1 || (pdp->dri3Major == 1 && pdp->dri3Minor >= 2)) &&
 386        (pdp->presentMajor > 1 ||
 387         (pdp->presentMajor == 1 && pdp->presentMinor >= 2)))
 388       has_multibuffer = true;
 389 #endif
 390
 391    (void) __glXInitialize(psc->base.dpy);
 392
 393    if (loader_dri3_drawable_init(XGetXCBConnection(base->dpy),
 394                                  xDrawable, psc->driScreen,
 395                                  psc->is_different_gpu, has_multibuffer,
 396                                  config->driConfig,
 397                                  &psc->loader_dri3_ext, &glx_dri3_vtable,
 398                                  &pdraw->loader_drawable)) {
 399       free(pdraw);
 400       return NULL;
 401    }
 402
 403    return &pdraw->base;
 404 }
 405
 406 /** dri3_wait_for_msc
 407  *
 408  * Get the X server to send an event when the target msc/divisor/remainder is
 409  * reached.
 410  */
 411 static int
 412 dri3_wait_for_msc(__GLXDRIdrawable *pdraw, int64_t target_msc, int64_t divisor,
 413                   int64_t remainder, int64_t *ust, int64_t *msc, int64_t *sbc)
 414 {
 415    struct dri3_drawable *priv = (struct dri3_drawable *) pdraw;
 416
 417    loader_dri3_wait_for_msc(&priv->loader_drawable, target_msc, divisor,
 418                             remainder, ust, msc, sbc);
 419
 420    return 1;
 421 }
 422
 423 /** dri3_drawable_get_msc
 424  *
 425  * Return the current UST/MSC/SBC triplet by asking the server
 426  * for an event
 427  */
 428 static int
 429 dri3_drawable_get_msc(struct glx_screen *psc, __GLXDRIdrawable *pdraw,
 430                       int64_t *ust, int64_t *msc, int64_t *sbc)
 431 {
 432    return dri3_wait_for_msc(pdraw, 0, 0, 0, ust, msc,sbc);
 433 }
 434
 435 /** dri3_wait_for_sbc
 436  *
 437  * Wait for the completed swap buffer count to reach the specified
 438  * target. Presumably the application knows that this will be reached with
 439  * outstanding complete events, or we're going to be here awhile.
 440  */
 441 static int
 442 dri3_wait_for_sbc(__GLXDRIdrawable *pdraw, int64_t target_sbc, int64_t *ust,
 443                   int64_t *msc, int64_t *sbc)
 444 {
 445    struct dri3_drawable *priv = (struct dri3_drawable *) pdraw;
 446
 447    return loader_dri3_wait_for_sbc(&priv->loader_drawable, target_sbc,
 448                                    ust, msc, sbc);
 449 }
 450
 451 static void
 452 dri3_copy_sub_buffer(__GLXDRIdrawable *pdraw, int x, int y,
 453                      int width, int height,
 454                      Bool flush)
 455 {
 456    struct dri3_drawable *priv = (struct dri3_drawable *) pdraw;
 457
 458    loader_dri3_copy_sub_buffer(&priv->loader_drawable, x, y,
 459                                width, height, flush);
 460 }
 461
 462 static void
 463 dri3_wait_x(struct glx_context *gc)
 464 {
 465    struct dri3_drawable *priv = (struct dri3_drawable *)
 466       GetGLXDRIDrawable(gc->currentDpy, gc->currentDrawable);
 467
 468    if (priv)
 469       loader_dri3_wait_x(&priv->loader_drawable);
 470 }
 471
 472 static void
 473 dri3_wait_gl(struct glx_context *gc)
 474 {
 475    struct dri3_drawable *priv = (struct dri3_drawable *)
 476       GetGLXDRIDrawable(gc->currentDpy, gc->currentDrawable);
 477
 478    if (priv)
 479       loader_dri3_wait_gl(&priv->loader_drawable);
 480 }
 481
 482 /**
 483  * Called by the driver when it needs to update the real front buffer with the
 484  * contents of its fake front buffer.
 485  */
 486 static void
 487 dri3_flush_front_buffer(__DRIdrawable *driDrawable, void *loaderPrivate)
 488 {
 489    struct loader_dri3_drawable *draw = loaderPrivate;
 490    struct dri3_drawable *pdraw = loader_drawable_to_dri3_drawable(draw);
 491    struct dri3_screen *psc;
 492
 493    if (!pdraw)
 494       return;
 495
 496    if (!pdraw->base.psc)
 497       return;
 498
 499    psc = (struct dri3_screen *) pdraw->base.psc;
 500
 501    (void) __glXInitialize(psc->base.dpy);
 502
 503    loader_dri3_flush(draw, __DRI2_FLUSH_DRAWABLE, __DRI2_THROTTLE_FLUSHFRONT);
 504
 505    psc->f->invalidate(driDrawable);
 506    loader_dri3_wait_gl(draw);
 507 }
 508
 509 /**
 510  * Make sure all pending swapbuffers have been submitted to hardware
 511  *
 512  * \param driDrawable[in]  Pointer to the dri drawable whose swaps we are
 513  * flushing.
 514  * \param loaderPrivate[in]  Pointer to the corresponding struct
 515  * loader_dri_drawable.
 516  */
 517 static void
 518 dri3_flush_swap_buffers(__DRIdrawable *driDrawable, void *loaderPrivate)
 519 {
 520    struct loader_dri3_drawable *draw = loaderPrivate;
 521    struct dri3_drawable *pdraw = loader_drawable_to_dri3_drawable(draw);
 522    struct dri3_screen *psc;
 523
 524    if (!pdraw)
 525       return;
 526
 527    if (!pdraw->base.psc)
 528       return;
 529
 530    psc = (struct dri3_screen *) pdraw->base.psc;
 531
 532    (void) __glXInitialize(psc->base.dpy);
 533    loader_dri3_swapbuffer_barrier(draw);
 534 }
 535
 536 static void
 537 dri_set_background_context(void *loaderPrivate)
 538 {
 539    struct dri3_context *pcp = (struct dri3_context *)loaderPrivate;
 540    __glXSetCurrentContext(&pcp->base);
 541 }
 542
 543 static GLboolean
 544 dri_is_thread_safe(void *loaderPrivate)
 545 {
 546    /* Unlike DRI2, DRI3 doesn't call GetBuffers/GetBuffersWithFormat
 547     * during draw so we're safe here.
 548     */
 549    return true;
 550 }
 551
 552 /* The image loader extension record for DRI3
 553  */
 554 static const __DRIimageLoaderExtension imageLoaderExtension = {
 555    .base = { __DRI_IMAGE_LOADER, 3 },
 556
 557    .getBuffers          = loader_dri3_get_buffers,
 558    .flushFrontBuffer    = dri3_flush_front_buffer,
 559    .flushSwapBuffers    = dri3_flush_swap_buffers,
 560 };
 561
 562 const __DRIuseInvalidateExtension dri3UseInvalidate = {
 563    .base = { __DRI_USE_INVALIDATE, 1 }
 564 };
 565
 566 static const __DRIbackgroundCallableExtension driBackgroundCallable = {
 567    .base = { __DRI_BACKGROUND_CALLABLE, 2 },
 568
 569    .setBackgroundContext = dri_set_background_context,
 570    .isThreadSafe         = dri_is_thread_safe,
 571 };
 572
 573 static const __DRIextension *loader_extensions[] = {
 574    &imageLoaderExtension.base,
 575    &dri3UseInvalidate.base,
 576    &driBackgroundCallable.base,
 577    NULL
 578 };
 579
 580 /** dri3_swap_buffers
 581  *
 582  * Make the current back buffer visible using the present extension
 583  */
 584 static int64_t
 585 dri3_swap_buffers(__GLXDRIdrawable *pdraw, int64_t target_msc, int64_t divisor,
 586                   int64_t remainder, Bool flush)
 587 {
 588    struct dri3_drawable *priv = (struct dri3_drawable *) pdraw;
 589    unsigned flags = __DRI2_FLUSH_DRAWABLE;
 590
 591    if (flush)
 592       flags |= __DRI2_FLUSH_CONTEXT;
 593
 594    return loader_dri3_swap_buffers_msc(&priv->loader_drawable,
 595                                        target_msc, divisor, remainder,
 596                                        flags, false);
 597 }
 598
 599 static int
 600 dri3_get_buffer_age(__GLXDRIdrawable *pdraw)
 601 {
 602    struct dri3_drawable *priv = (struct dri3_drawable *)pdraw;
 603
 604    return loader_dri3_query_buffer_age(&priv->loader_drawable);
 605 }
 606
 607 /** dri3_destroy_screen
 608  */
 609 static void
 610 dri3_destroy_screen(struct glx_screen *base)
 611 {
 612    struct dri3_screen *psc = (struct dri3_screen *) base;
 613
 614    /* Free the direct rendering per screen data */
 615    loader_dri3_close_screen(psc->driScreen);
 616    (*psc->core->destroyScreen) (psc->driScreen);
 617    driDestroyConfigs(psc->driver_configs);
 618    close(psc->fd);
 619    free(psc);
 620 }
 621
 622 /** dri3_set_swap_interval
 623  *
 624  * Record the application swap interval specification,
 625  */
 626 static int
 627 dri3_set_swap_interval(__GLXDRIdrawable *pdraw, int interval)
 628 {
 629    assert(pdraw != NULL);
 630
 631    struct dri3_drawable *priv =  (struct dri3_drawable *) pdraw;
 632    GLint vblank_mode = DRI_CONF_VBLANK_DEF_INTERVAL_1;
 633    struct dri3_screen *psc = (struct dri3_screen *) priv->base.psc;
 634
 635    if (psc->config)
 636       psc->config->configQueryi(psc->driScreen,
 637                                 "vblank_mode", &vblank_mode);
 638
 639    switch (vblank_mode) {
 640    case DRI_CONF_VBLANK_NEVER:
 641       if (interval != 0)
 642          return GLX_BAD_VALUE;
 643       break;
 644    case DRI_CONF_VBLANK_ALWAYS_SYNC:
 645       if (interval <= 0)
 646          return GLX_BAD_VALUE;
 647       break;
 648    default:
 649       break;
 650    }
 651
 652    loader_dri3_set_swap_interval(&priv->loader_drawable, interval);
 653
 654    return 0;
 655 }
 656
 657 /** dri3_get_swap_interval
 658  *
 659  * Return the stored swap interval
 660  */
 661 static int
 662 dri3_get_swap_interval(__GLXDRIdrawable *pdraw)
 663 {
 664    assert(pdraw != NULL);
 665
 666    struct dri3_drawable *priv =  (struct dri3_drawable *) pdraw;
 667
 668   return priv->loader_drawable.swap_interval;
 669 }
 670
 671 static void
 672 dri3_bind_tex_image(Display * dpy,
 673                     GLXDrawable drawable,
 674                     int buffer, const int *attrib_list)
 675 {
 676    struct glx_context *gc = __glXGetCurrentContext();
 677    struct dri3_context *pcp = (struct dri3_context *) gc;
 678    __GLXDRIdrawable *base = GetGLXDRIDrawable(dpy, drawable);
 679    struct dri3_drawable *pdraw = (struct dri3_drawable *) base;
 680    struct dri3_screen *psc;
 681
 682    if (pdraw != NULL) {
 683       psc = (struct dri3_screen *) base->psc;
 684
 685       psc->f->invalidate(pdraw->loader_drawable.dri_drawable);
 686
 687       XSync(dpy, false);
 688
 689       (*psc->texBuffer->setTexBuffer2) (pcp->driContext,
 690                                         pdraw->base.textureTarget,
 691                                         pdraw->base.textureFormat,
 692                                         pdraw->loader_drawable.dri_drawable);
 693    }
 694 }
 695
 696 static void
 697 dri3_release_tex_image(Display * dpy, GLXDrawable drawable, int buffer)
 698 {
 699    struct glx_context *gc = __glXGetCurrentContext();
 700    struct dri3_context *pcp = (struct dri3_context *) gc;
 701    __GLXDRIdrawable *base = GetGLXDRIDrawable(dpy, drawable);
 702    struct dri3_drawable *pdraw = (struct dri3_drawable *) base;
 703    struct dri3_screen *psc;
 704
 705    if (pdraw != NULL) {
 706       psc = (struct dri3_screen *) base->psc;
 707
 708       if (psc->texBuffer->base.version >= 3 &&
 709           psc->texBuffer->releaseTexBuffer != NULL)
 710          (*psc->texBuffer->releaseTexBuffer) (pcp->driContext,
 711                                               pdraw->base.textureTarget,
 712                                               pdraw->loader_drawable.dri_drawable);
 713    }
 714 }
 715
 716 static const struct glx_context_vtable dri3_context_vtable = {
 717    .destroy             = dri3_destroy_context,
 718    .bind                = dri3_bind_context,
 719    .unbind              = dri3_unbind_context,
 720    .wait_gl             = dri3_wait_gl,
 721    .wait_x              = dri3_wait_x,
 722    .use_x_font          = DRI_glXUseXFont,
 723    .bind_tex_image      = dri3_bind_tex_image,
 724    .release_tex_image   = dri3_release_tex_image,
 725    .get_proc_address    = NULL,
 726    .interop_query_device_info = dri3_interop_query_device_info,
 727    .interop_export_object = dri3_interop_export_object
 728 };
 729
 730 /** dri3_bind_extensions
 731  *
 732  * Enable all of the extensions supported on DRI3
 733  */
 734 static void
 735 dri3_bind_extensions(struct dri3_screen *psc, struct glx_display * priv,
 736                      const char *driverName)
 737 {
 738    const __DRIextension **extensions;
 739    unsigned mask;
 740    int i;
 741
 742    extensions = psc->core->getExtensions(psc->driScreen);
 743
 744    __glXEnableDirectExtension(&psc->base, "GLX_SGI_swap_control");
 745    __glXEnableDirectExtension(&psc->base, "GLX_MESA_swap_control");
 746    __glXEnableDirectExtension(&psc->base, "GLX_SGI_make_current_read");
 747    __glXEnableDirectExtension(&psc->base, "GLX_INTEL_swap_event");
 748
 749    mask = psc->image_driver->getAPIMask(psc->driScreen);
 750
 751    __glXEnableDirectExtension(&psc->base, "GLX_ARB_create_context");
 752    __glXEnableDirectExtension(&psc->base, "GLX_ARB_create_context_profile");
 753
 754    if ((mask & ((1 << __DRI_API_GLES) |
 755                 (1 << __DRI_API_GLES2) |
 756                 (1 << __DRI_API_GLES3))) != 0) {
 757       __glXEnableDirectExtension(&psc->base,
 758                                  "GLX_EXT_create_context_es_profile");
 759       __glXEnableDirectExtension(&psc->base,
 760                                  "GLX_EXT_create_context_es2_profile");
 761    }
 762
 763    for (i = 0; extensions[i]; i++) {
 764       /* when on a different gpu than the server, the server pixmaps
 765        * can have a tiling mode we can't read. Thus we can't create
 766        * a texture from them.
 767        */
 768       if (!psc->is_different_gpu &&
 769          (strcmp(extensions[i]->name, __DRI_TEX_BUFFER) == 0)) {
 770          psc->texBuffer = (__DRItexBufferExtension *) extensions[i];
 771          __glXEnableDirectExtension(&psc->base, "GLX_EXT_texture_from_pixmap");
 772       }
 773
 774       if ((strcmp(extensions[i]->name, __DRI2_FLUSH) == 0)) {
 775          psc->f = (__DRI2flushExtension *) extensions[i];
 776          /* internal driver extension, no GL extension exposed */
 777       }
 778
 779       if (strcmp(extensions[i]->name, __DRI_IMAGE) == 0)
 780          psc->image = (__DRIimageExtension *) extensions[i];
 781
 782       if ((strcmp(extensions[i]->name, __DRI2_CONFIG_QUERY) == 0))
 783          psc->config = (__DRI2configQueryExtension *) extensions[i];
 784
 785       if (strcmp(extensions[i]->name, __DRI2_ROBUSTNESS) == 0)
 786          __glXEnableDirectExtension(&psc->base,
 787                                     "GLX_ARB_create_context_robustness");
 788
 789       if (strcmp(extensions[i]->name, __DRI2_NO_ERROR) == 0)
 790          __glXEnableDirectExtension(&psc->base,
 791                                     "GLX_ARB_create_context_no_error");
 792
 793       if (strcmp(extensions[i]->name, __DRI2_RENDERER_QUERY) == 0) {
 794          psc->rendererQuery = (__DRI2rendererQueryExtension *) extensions[i];
 795          __glXEnableDirectExtension(&psc->base, "GLX_MESA_query_renderer");
 796       }
 797
 798       if (strcmp(extensions[i]->name, __DRI2_INTEROP) == 0)
 799          psc->interop = (__DRI2interopExtension*)extensions[i];
 800
 801       if (strcmp(extensions[i]->name, __DRI2_FLUSH_CONTROL) == 0)
 802          __glXEnableDirectExtension(&psc->base,
 803                                     "GLX_ARB_context_flush_control");
 804    }
 805 }
 806
 807 static const struct glx_screen_vtable dri3_screen_vtable = {
 808    .create_context         = dri3_create_context,
 809    .create_context_attribs = dri3_create_context_attribs,
 810    .query_renderer_integer = dri3_query_renderer_integer,
 811    .query_renderer_string  = dri3_query_renderer_string,
 812 };
 813
 814 /** dri3_create_screen
 815  *
 816  * Initialize DRI3 on the specified screen.
 817  *
 818  * Opens the DRI device, locates the appropriate DRI driver
 819  * and loads that.
 820  *
 821  * Checks to see if the driver supports the necessary extensions
 822  *
 823  * Initializes the driver for the screen and sets up our structures
 824  */
 825
 826 static struct glx_screen *
 827 dri3_create_screen(int screen, struct glx_display * priv)
 828 {
 829    xcb_connection_t *c = XGetXCBConnection(priv->dpy);
 830    const __DRIconfig **driver_configs;
 831    const __DRIextension **extensions;
 832    const struct dri3_display *const pdp = (struct dri3_display *)
 833       priv->dri3Display;
 834    struct dri3_screen *psc;
 835    __GLXDRIscreen *psp;
 836    struct glx_config *configs = NULL, *visuals = NULL;
 837    char *driverName, *tmp;
 838    int i;
 839    unsigned char disable;
 840
 841    psc = calloc(1, sizeof *psc);
 842    if (psc == NULL)
 843       return NULL;
 844
 845    psc->fd = -1;
 846
 847    if (!glx_screen_init(&psc->base, screen, priv)) {
 848       free(psc);
 849       return NULL;
 850    }
 851
 852    psc->fd = loader_dri3_open(c, RootWindow(priv->dpy, screen), None);
 853    if (psc->fd < 0) {
 854       int conn_error = xcb_connection_has_error(c);
 855
 856       glx_screen_cleanup(&psc->base);
 857       free(psc);
 858       InfoMessageF("screen %d does not appear to be DRI3 capable\n", screen);
 859
 860       if (conn_error)
 861          ErrorMessageF("Connection closed during DRI3 initialization failure");
 862
 863       return NULL;
 864    }
 865
 866    psc->fd = loader_get_user_preferred_fd(psc->fd, &psc->is_different_gpu);
 867
 868    driverName = loader_get_driver_for_fd(psc->fd);
 869    if (!driverName) {
 870       ErrorMessageF("No driver found\n");
 871       goto handle_error;
 872    }
 873
 874    extensions = driOpenDriver(driverName, &psc->driver);
 875    if (extensions == NULL)
 876       goto handle_error;
 877
 878    for (i = 0; extensions[i]; i++) {
 879       if (strcmp(extensions[i]->name, __DRI_CORE) == 0)
 880          psc->core = (__DRIcoreExtension *) extensions[i];
 881       if (strcmp(extensions[i]->name, __DRI_IMAGE_DRIVER) == 0)
 882          psc->image_driver = (__DRIimageDriverExtension *) extensions[i];
 883    }
 884
 885
 886    if (psc->core == NULL) {
 887       ErrorMessageF("core dri driver extension not found\n");
 888       goto handle_error;
 889    }
 890
 891    if (psc->image_driver == NULL) {
 892       ErrorMessageF("image driver extension not found\n");
 893       goto handle_error;
 894    }
 895
 896    psc->driScreen =
 897       psc->image_driver->createNewScreen2(screen, psc->fd,
 898                                           pdp->loader_extensions,
 899                                           extensions,
 900                                           &driver_configs, psc);
 901
 902    if (psc->driScreen == NULL) {
 903       ErrorMessageF("failed to create dri screen\n");
 904       goto handle_error;
 905    }
 906
 907    dri3_bind_extensions(psc, priv, driverName);
 908
 909    if (!psc->image || psc->image->base.version < 7 || !psc->image->createImageFromFds) {
 910       ErrorMessageF("Version 7 or imageFromFds image extension not found\n");
 911       goto handle_error;
 912    }
 913
 914    if (!psc->f || psc->f->base.version < 4) {
 915       ErrorMessageF("Version 4 or later of flush extension not found\n");
 916       goto handle_error;
 917    }
 918
 919    if (psc->is_different_gpu && psc->image->base.version < 9) {
 920       ErrorMessageF("Different GPU, but image extension version 9 or later not found\n");
 921       goto handle_error;
 922    }
 923
 924    if (psc->is_different_gpu && !psc->image->blitImage) {
 925       ErrorMessageF("Different GPU, but blitImage not implemented for this driver\n");
 926       goto handle_error;
 927    }
 928
 929    if (!psc->is_different_gpu && (
 930        !psc->texBuffer || psc->texBuffer->base.version < 2 ||
 931        !psc->texBuffer->setTexBuffer2
 932        )) {
 933       ErrorMessageF("Version 2 or later of texBuffer extension not found\n");
 934       goto handle_error;
 935    }
 936
 937    psc->loader_dri3_ext.core = psc->core;
 938    psc->loader_dri3_ext.image_driver = psc->image_driver;
 939    psc->loader_dri3_ext.flush = psc->f;
 940    psc->loader_dri3_ext.tex_buffer = psc->texBuffer;
 941    psc->loader_dri3_ext.image = psc->image;
 942    psc->loader_dri3_ext.config = psc->config;
 943
 944    configs = driConvertConfigs(psc->core, psc->base.configs, driver_configs);
 945    visuals = driConvertConfigs(psc->core, psc->base.visuals, driver_configs);
 946
 947    if (!configs || !visuals) {
 948        ErrorMessageF("No matching fbConfigs or visuals found\n");
 949        goto handle_error;
 950    }
 951
 952    glx_config_destroy_list(psc->base.configs);
 953    psc->base.configs = configs;
 954    glx_config_destroy_list(psc->base.visuals);
 955    psc->base.visuals = visuals;
 956
 957    psc->driver_configs = driver_configs;
 958
 959    psc->base.vtable = &dri3_screen_vtable;
 960    psp = &psc->vtable;
 961    psc->base.driScreen = psp;
 962    psp->destroyScreen = dri3_destroy_screen;
 963    psp->createDrawable = dri3_create_drawable;
 964    psp->swapBuffers = dri3_swap_buffers;
 965
 966    psp->getDrawableMSC = dri3_drawable_get_msc;
 967    psp->waitForMSC = dri3_wait_for_msc;
 968    psp->waitForSBC = dri3_wait_for_sbc;
 969    psp->setSwapInterval = dri3_set_swap_interval;
 970    psp->getSwapInterval = dri3_get_swap_interval;
 971    if (psc->config->configQueryb(psc->driScreen,
 972                                  "glx_disable_oml_sync_control",
 973                                  &disable) || !disable)
 974       __glXEnableDirectExtension(&psc->base, "GLX_OML_sync_control");
 975
 976    if (psc->config->configQueryb(psc->driScreen,
 977                                  "glx_disable_sgi_video_sync",
 978                                  &disable) || !disable)
 979       __glXEnableDirectExtension(&psc->base, "GLX_SGI_video_sync");
 980
 981    psp->copySubBuffer = dri3_copy_sub_buffer;
 982    __glXEnableDirectExtension(&psc->base, "GLX_MESA_copy_sub_buffer");
 983
 984    psp->getBufferAge = dri3_get_buffer_age;
 985    if (psc->config->configQueryb(psc->driScreen,
 986                                  "glx_disable_ext_buffer_age",
 987                                  &disable) || !disable)
 988       __glXEnableDirectExtension(&psc->base, "GLX_EXT_buffer_age");
 989
 990    free(driverName);
 991
 992    tmp = getenv("LIBGL_SHOW_FPS");
 993    psc->show_fps_interval = tmp ? atoi(tmp) : 0;
 994    if (psc->show_fps_interval < 0)
 995       psc->show_fps_interval = 0;
 996
 997    InfoMessageF("Using DRI3 for screen %d\n", screen);
 998
 999    return &psc->base;
1000
1001 handle_error:
1002    CriticalErrorMessageF("failed to load driver: %s\n", driverName ? driverName : "(null)");
1003
1004    if (configs)
1005        glx_config_destroy_list(configs);
1006    if (visuals)
1007        glx_config_destroy_list(visuals);
1008    if (psc->driScreen)
1009        psc->core->destroyScreen(psc->driScreen);
1010    psc->driScreen = NULL;
1011    if (psc->fd >= 0)
1012       close(psc->fd);
1013    if (psc->driver)
1014       dlclose(psc->driver);
1015
1016    free(driverName);
1017    glx_screen_cleanup(&psc->base);
1018    free(psc);
1019
1020    return NULL;
1021 }
1022
1023 /** dri_destroy_display
1024  *
1025  * Called from __glXFreeDisplayPrivate.
1026  */
1027 static void
1028 dri3_destroy_display(__GLXDRIdisplay * dpy)
1029 {
1030    free(dpy);
1031 }
1032
1033 /* Only request versions of these protocols which we actually support. */
1034 #define DRI3_SUPPORTED_MAJOR 1
1035 #define PRESENT_SUPPORTED_MAJOR 1
1036
1037 #ifdef HAVE_DRI3_MODIFIERS
1038 #define DRI3_SUPPORTED_MINOR 2
1039 #define PRESENT_SUPPORTED_MINOR 2
1040 #else
1041 #define PRESENT_SUPPORTED_MINOR 0
1042 #define DRI3_SUPPORTED_MINOR 0
1043 #endif
1044
1045 /** dri3_create_display
1046  *
1047  * Allocate, initialize and return a __DRIdisplayPrivate object.
1048  * This is called from __glXInitialize() when we are given a new
1049  * display pointer. This is public to that function, but hidden from
1050  * outside of libGL.
1051  */
1052 _X_HIDDEN __GLXDRIdisplay *
1053 dri3_create_display(Display * dpy)
1054 {
1055    struct dri3_display                  *pdp;
1056    xcb_connection_t                     *c = XGetXCBConnection(dpy);
1057    xcb_dri3_query_version_cookie_t      dri3_cookie;
1058    xcb_dri3_query_version_reply_t       *dri3_reply;
1059    xcb_present_query_version_cookie_t   present_cookie;
1060    xcb_present_query_version_reply_t    *present_reply;
1061    xcb_generic_error_t                  *error;
1062    const xcb_query_extension_reply_t    *extension;
1063
1064    xcb_prefetch_extension_data(c, &xcb_dri3_id);
1065    xcb_prefetch_extension_data(c, &xcb_present_id);
1066
1067    extension = xcb_get_extension_data(c, &xcb_dri3_id);
1068    if (!(extension && extension->present))
1069       return NULL;
1070
1071    extension = xcb_get_extension_data(c, &xcb_present_id);
1072    if (!(extension && extension->present))
1073       return NULL;
1074
1075    dri3_cookie = xcb_dri3_query_version(c,
1076                                         DRI3_SUPPORTED_MAJOR,
1077                                         DRI3_SUPPORTED_MINOR);
1078    present_cookie = xcb_present_query_version(c,
1079                                               PRESENT_SUPPORTED_MAJOR,
1080                                               PRESENT_SUPPORTED_MINOR);
1081
1082    pdp = malloc(sizeof *pdp);
1083    if (pdp == NULL)
1084       return NULL;
1085
1086    dri3_reply = xcb_dri3_query_version_reply(c, dri3_cookie, &error);
1087    if (!dri3_reply) {
1088       free(error);
1089       goto no_extension;
1090    }
1091
1092    pdp->dri3Major = dri3_reply->major_version;
1093    pdp->dri3Minor = dri3_reply->minor_version;
1094    free(dri3_reply);
1095
1096    present_reply = xcb_present_query_version_reply(c, present_cookie, &error);
1097    if (!present_reply) {
1098       free(error);
1099       goto no_extension;
1100    }
1101    pdp->presentMajor = present_reply->major_version;
1102    pdp->presentMinor = present_reply->minor_version;
1103    free(present_reply);
1104
1105    pdp->base.destroyDisplay = dri3_destroy_display;
1106    pdp->base.createScreen = dri3_create_screen;
1107
1108    loader_set_logger(dri_message);
1109
1110    pdp->loader_extensions = loader_extensions;
1111
1112    return &pdp->base;
1113 no_extension:
1114    free(pdp);
1115    return NULL;
1116 }
1117
1118 #endif /* GLX_DIRECT_RENDERING */