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    /* Check the renderType value */
 263    if (!validate_renderType_against_config(config_base, render_type))
 264        goto error_exit;
 265
 266    if (shareList) {
 267       pcp_shared = (struct dri3_context *) shareList;
 268       shared = pcp_shared->driContext;
 269    }
 270
 271    pcp = calloc(1, sizeof *pcp);
 272    if (pcp == NULL) {
 273       *error = __DRI_CTX_ERROR_NO_MEMORY;
 274       goto error_exit;
 275    }
 276
 277    if (!glx_context_init(&pcp->base, &psc->base, config_base))
 278       goto error_exit;
 279
 280    ctx_attribs[num_ctx_attribs++] = __DRI_CTX_ATTRIB_MAJOR_VERSION;
 281    ctx_attribs[num_ctx_attribs++] = major_ver;
 282    ctx_attribs[num_ctx_attribs++] = __DRI_CTX_ATTRIB_MINOR_VERSION;
 283    ctx_attribs[num_ctx_attribs++] = minor_ver;
 284
 285    /* Only send a value when the non-default value is requested.  By doing
 286     * this we don't have to check the driver's DRI3 version before sending the
 287     * default value.
 288     */
 289    if (reset != __DRI_CTX_RESET_NO_NOTIFICATION) {
 290       ctx_attribs[num_ctx_attribs++] = __DRI_CTX_ATTRIB_RESET_STRATEGY;
 291       ctx_attribs[num_ctx_attribs++] = reset;
 292    }
 293
 294    if (release != __DRI_CTX_RELEASE_BEHAVIOR_FLUSH) {
 295       ctx_attribs[num_ctx_attribs++] = __DRI_CTX_ATTRIB_RELEASE_BEHAVIOR;
 296       ctx_attribs[num_ctx_attribs++] = release;
 297    }
 298
 299    if (flags != 0) {
 300       ctx_attribs[num_ctx_attribs++] = __DRI_CTX_ATTRIB_FLAGS;
 301
 302       /* The current __DRI_CTX_FLAG_* values are identical to the
 303        * GLX_CONTEXT_*_BIT values.
 304        */
 305       ctx_attribs[num_ctx_attribs++] = flags;
 306    }
 307
 308    pcp->driContext =
 309       (*psc->image_driver->createContextAttribs) (psc->driScreen,
 310                                                   api,
 311                                                   config ? config->driConfig
 312                                                          : NULL,
 313                                                   shared,
 314                                                   num_ctx_attribs / 2,
 315                                                   ctx_attribs,
 316                                                   error,
 317                                                   pcp);
 318
 319    if (pcp->driContext == NULL)
 320       goto error_exit;
 321
 322    pcp->base.vtable = &dri3_context_vtable;
 323
 324    return &pcp->base;
 325
 326 error_exit:
 327    free(pcp);
 328
 329    return NULL;
 330 }
 331
 332 static struct glx_context *
 333 dri3_create_context(struct glx_screen *base,
 334                     struct glx_config *config_base,
 335                     struct glx_context *shareList, int renderType)
 336 {
 337    unsigned int error;
 338    uint32_t attribs[2] = { GLX_RENDER_TYPE, renderType };
 339
 340    return dri3_create_context_attribs(base, config_base, shareList,
 341                                       1, attribs, &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    const struct dri3_display *const pdp = (struct dri3_display *)
 361       base->display->dri3Display;
 362    __GLXDRIconfigPrivate *config = (__GLXDRIconfigPrivate *) config_base;
 363    bool has_multibuffer = false;
 364
 365    pdraw = calloc(1, sizeof(*pdraw));
 366    if (!pdraw)
 367       return NULL;
 368
 369    pdraw->base.destroyDrawable = dri3_destroy_drawable;
 370    pdraw->base.xDrawable = xDrawable;
 371    pdraw->base.drawable = drawable;
 372    pdraw->base.psc = &psc->base;
 373
 374    if ((psc->image && psc->image->base.version >= 15) &&
 375        (pdp->dri3Major > 1 || (pdp->dri3Major == 1 && pdp->dri3Minor >= 2)))
 376       has_multibuffer = true;
 377
 378    (void) __glXInitialize(psc->base.dpy);
 379
 380    if (loader_dri3_drawable_init(XGetXCBConnection(base->dpy),
 381                                  xDrawable, psc->driScreen,
 382                                  psc->is_different_gpu, has_multibuffer,
 383                                  config->driConfig,
 384                                  &psc->loader_dri3_ext, &glx_dri3_vtable,
 385                                  &pdraw->loader_drawable)) {
 386       free(pdraw);
 387       return NULL;
 388    }
 389
 390    return &pdraw->base;
 391 }
 392
 393 /** dri3_wait_for_msc
 394  *
 395  * Get the X server to send an event when the target msc/divisor/remainder is
 396  * reached.
 397  */
 398 static int
 399 dri3_wait_for_msc(__GLXDRIdrawable *pdraw, int64_t target_msc, int64_t divisor,
 400                   int64_t remainder, int64_t *ust, int64_t *msc, int64_t *sbc)
 401 {
 402    struct dri3_drawable *priv = (struct dri3_drawable *) pdraw;
 403
 404    loader_dri3_wait_for_msc(&priv->loader_drawable, target_msc, divisor,
 405                             remainder, ust, msc, sbc);
 406
 407    return 1;
 408 }
 409
 410 /** dri3_drawable_get_msc
 411  *
 412  * Return the current UST/MSC/SBC triplet by asking the server
 413  * for an event
 414  */
 415 static int
 416 dri3_drawable_get_msc(struct glx_screen *psc, __GLXDRIdrawable *pdraw,
 417                       int64_t *ust, int64_t *msc, int64_t *sbc)
 418 {
 419    return dri3_wait_for_msc(pdraw, 0, 0, 0, ust, msc,sbc);
 420 }
 421
 422 /** dri3_wait_for_sbc
 423  *
 424  * Wait for the completed swap buffer count to reach the specified
 425  * target. Presumably the application knows that this will be reached with
 426  * outstanding complete events, or we're going to be here awhile.
 427  */
 428 static int
 429 dri3_wait_for_sbc(__GLXDRIdrawable *pdraw, int64_t target_sbc, int64_t *ust,
 430                   int64_t *msc, int64_t *sbc)
 431 {
 432    struct dri3_drawable *priv = (struct dri3_drawable *) pdraw;
 433
 434    return loader_dri3_wait_for_sbc(&priv->loader_drawable, target_sbc,
 435                                    ust, msc, sbc);
 436 }
 437
 438 static void
 439 dri3_copy_sub_buffer(__GLXDRIdrawable *pdraw, int x, int y,
 440                      int width, int height,
 441                      Bool flush)
 442 {
 443    struct dri3_drawable *priv = (struct dri3_drawable *) pdraw;
 444
 445    loader_dri3_copy_sub_buffer(&priv->loader_drawable, x, y,
 446                                width, height, flush);
 447 }
 448
 449 static void
 450 dri3_wait_x(struct glx_context *gc)
 451 {
 452    struct dri3_drawable *priv = (struct dri3_drawable *)
 453       GetGLXDRIDrawable(gc->currentDpy, gc->currentDrawable);
 454
 455    if (priv)
 456       loader_dri3_wait_x(&priv->loader_drawable);
 457 }
 458
 459 static void
 460 dri3_wait_gl(struct glx_context *gc)
 461 {
 462    struct dri3_drawable *priv = (struct dri3_drawable *)
 463       GetGLXDRIDrawable(gc->currentDpy, gc->currentDrawable);
 464
 465    if (priv)
 466       loader_dri3_wait_gl(&priv->loader_drawable);
 467 }
 468
 469 /**
 470  * Called by the driver when it needs to update the real front buffer with the
 471  * contents of its fake front buffer.
 472  */
 473 static void
 474 dri3_flush_front_buffer(__DRIdrawable *driDrawable, void *loaderPrivate)
 475 {
 476    struct loader_dri3_drawable *draw = loaderPrivate;
 477    struct dri3_drawable *pdraw = loader_drawable_to_dri3_drawable(draw);
 478    struct dri3_screen *psc;
 479
 480    if (!pdraw)
 481       return;
 482
 483    if (!pdraw->base.psc)
 484       return;
 485
 486    psc = (struct dri3_screen *) pdraw->base.psc;
 487
 488    (void) __glXInitialize(psc->base.dpy);
 489
 490    loader_dri3_flush(draw, __DRI2_FLUSH_DRAWABLE, __DRI2_THROTTLE_FLUSHFRONT);
 491
 492    (*psc->f->invalidate)(driDrawable);
 493    loader_dri3_wait_gl(draw);
 494 }
 495
 496 /**
 497  * Make sure all pending swapbuffers have been submitted to hardware
 498  *
 499  * \param driDrawable[in]  Pointer to the dri drawable whose swaps we are
 500  * flushing.
 501  * \param loaderPrivate[in]  Pointer to the corresponding struct
 502  * loader_dri_drawable.
 503  */
 504 static void
 505 dri3_flush_swap_buffers(__DRIdrawable *driDrawable, void *loaderPrivate)
 506 {
 507    struct loader_dri3_drawable *draw = loaderPrivate;
 508    struct dri3_drawable *pdraw = loader_drawable_to_dri3_drawable(draw);
 509    struct dri3_screen *psc;
 510
 511    if (!pdraw)
 512       return;
 513
 514    if (!pdraw->base.psc)
 515       return;
 516
 517    psc = (struct dri3_screen *) pdraw->base.psc;
 518
 519    (void) __glXInitialize(psc->base.dpy);
 520    loader_dri3_swapbuffer_barrier(draw);
 521 }
 522
 523 static void
 524 dri_set_background_context(void *loaderPrivate)
 525 {
 526    struct dri3_context *pcp = (struct dri3_context *)loaderPrivate;
 527    __glXSetCurrentContext(&pcp->base);
 528 }
 529
 530 static GLboolean
 531 dri_is_thread_safe(void *loaderPrivate)
 532 {
 533    /* Unlike DRI2, DRI3 doesn't call GetBuffers/GetBuffersWithFormat
 534     * during draw so we're safe here.
 535     */
 536    return true;
 537 }
 538
 539 /* The image loader extension record for DRI3
 540  */
 541 static const __DRIimageLoaderExtension imageLoaderExtension = {
 542    .base = { __DRI_IMAGE_LOADER, 3 },
 543
 544    .getBuffers          = loader_dri3_get_buffers,
 545    .flushFrontBuffer    = dri3_flush_front_buffer,
 546    .flushSwapBuffers    = dri3_flush_swap_buffers,
 547 };
 548
 549 const __DRIuseInvalidateExtension dri3UseInvalidate = {
 550    .base = { __DRI_USE_INVALIDATE, 1 }
 551 };
 552
 553 static const __DRIbackgroundCallableExtension driBackgroundCallable = {
 554    .base = { __DRI_BACKGROUND_CALLABLE, 2 },
 555
 556    .setBackgroundContext = dri_set_background_context,
 557    .isThreadSafe         = dri_is_thread_safe,
 558 };
 559
 560 static const __DRIextension *loader_extensions[] = {
 561    &imageLoaderExtension.base,
 562    &dri3UseInvalidate.base,
 563    &driBackgroundCallable.base,
 564    NULL
 565 };
 566
 567 /** dri3_swap_buffers
 568  *
 569  * Make the current back buffer visible using the present extension
 570  */
 571 static int64_t
 572 dri3_swap_buffers(__GLXDRIdrawable *pdraw, int64_t target_msc, int64_t divisor,
 573                   int64_t remainder, Bool flush)
 574 {
 575    struct dri3_drawable *priv = (struct dri3_drawable *) pdraw;
 576    unsigned flags = __DRI2_FLUSH_DRAWABLE;
 577
 578    if (flush)
 579       flags |= __DRI2_FLUSH_CONTEXT;
 580
 581    return loader_dri3_swap_buffers_msc(&priv->loader_drawable,
 582                                        target_msc, divisor, remainder,
 583                                        flags, false);
 584 }
 585
 586 static int
 587 dri3_get_buffer_age(__GLXDRIdrawable *pdraw)
 588 {
 589    struct dri3_drawable *priv = (struct dri3_drawable *)pdraw;
 590
 591    return loader_dri3_query_buffer_age(&priv->loader_drawable);
 592 }
 593
 594 /** dri3_destroy_screen
 595  */
 596 static void
 597 dri3_destroy_screen(struct glx_screen *base)
 598 {
 599    struct dri3_screen *psc = (struct dri3_screen *) base;
 600
 601    /* Free the direct rendering per screen data */
 602    loader_dri3_close_screen(psc->driScreen);
 603    (*psc->core->destroyScreen) (psc->driScreen);
 604    driDestroyConfigs(psc->driver_configs);
 605    close(psc->fd);
 606    free(psc);
 607 }
 608
 609 /** dri3_set_swap_interval
 610  *
 611  * Record the application swap interval specification,
 612  */
 613 static int
 614 dri3_set_swap_interval(__GLXDRIdrawable *pdraw, int interval)
 615 {
 616    assert(pdraw != NULL);
 617
 618    struct dri3_drawable *priv =  (struct dri3_drawable *) pdraw;
 619    GLint vblank_mode = DRI_CONF_VBLANK_DEF_INTERVAL_1;
 620    struct dri3_screen *psc = (struct dri3_screen *) priv->base.psc;
 621
 622    if (psc->config)
 623       psc->config->configQueryi(psc->driScreen,
 624                                 "vblank_mode", &vblank_mode);
 625
 626    switch (vblank_mode) {
 627    case DRI_CONF_VBLANK_NEVER:
 628       if (interval != 0)
 629          return GLX_BAD_VALUE;
 630       break;
 631    case DRI_CONF_VBLANK_ALWAYS_SYNC:
 632       if (interval <= 0)
 633          return GLX_BAD_VALUE;
 634       break;
 635    default:
 636       break;
 637    }
 638
 639    priv->swap_interval = interval;
 640    loader_dri3_set_swap_interval(&priv->loader_drawable, interval);
 641
 642    return 0;
 643 }
 644
 645 /** dri3_get_swap_interval
 646  *
 647  * Return the stored swap interval
 648  */
 649 static int
 650 dri3_get_swap_interval(__GLXDRIdrawable *pdraw)
 651 {
 652    assert(pdraw != NULL);
 653
 654    struct dri3_drawable *priv =  (struct dri3_drawable *) pdraw;
 655
 656   return priv->swap_interval;
 657 }
 658
 659 static void
 660 dri3_bind_tex_image(Display * dpy,
 661                     GLXDrawable drawable,
 662                     int buffer, const int *attrib_list)
 663 {
 664    struct glx_context *gc = __glXGetCurrentContext();
 665    struct dri3_context *pcp = (struct dri3_context *) gc;
 666    __GLXDRIdrawable *base = GetGLXDRIDrawable(dpy, drawable);
 667    struct dri3_drawable *pdraw = (struct dri3_drawable *) base;
 668    struct dri3_screen *psc;
 669
 670    if (pdraw != NULL) {
 671       psc = (struct dri3_screen *) base->psc;
 672
 673       (*psc->f->invalidate)(pdraw->loader_drawable.dri_drawable);
 674
 675       XSync(dpy, false);
 676
 677       (*psc->texBuffer->setTexBuffer2) (pcp->driContext,
 678                                         pdraw->base.textureTarget,
 679                                         pdraw->base.textureFormat,
 680                                         pdraw->loader_drawable.dri_drawable);
 681    }
 682 }
 683
 684 static void
 685 dri3_release_tex_image(Display * dpy, GLXDrawable drawable, int buffer)
 686 {
 687    struct glx_context *gc = __glXGetCurrentContext();
 688    struct dri3_context *pcp = (struct dri3_context *) gc;
 689    __GLXDRIdrawable *base = GetGLXDRIDrawable(dpy, drawable);
 690    struct dri3_drawable *pdraw = (struct dri3_drawable *) base;
 691    struct dri3_screen *psc;
 692
 693    if (pdraw != NULL) {
 694       psc = (struct dri3_screen *) base->psc;
 695
 696       if (psc->texBuffer->base.version >= 3 &&
 697           psc->texBuffer->releaseTexBuffer != NULL)
 698          (*psc->texBuffer->releaseTexBuffer) (pcp->driContext,
 699                                               pdraw->base.textureTarget,
 700                                               pdraw->loader_drawable.dri_drawable);
 701    }
 702 }
 703
 704 static const struct glx_context_vtable dri3_context_vtable = {
 705    .destroy             = dri3_destroy_context,
 706    .bind                = dri3_bind_context,
 707    .unbind              = dri3_unbind_context,
 708    .wait_gl             = dri3_wait_gl,
 709    .wait_x              = dri3_wait_x,
 710    .use_x_font          = DRI_glXUseXFont,
 711    .bind_tex_image      = dri3_bind_tex_image,
 712    .release_tex_image   = dri3_release_tex_image,
 713    .get_proc_address    = NULL,
 714    .interop_query_device_info = dri3_interop_query_device_info,
 715    .interop_export_object = dri3_interop_export_object
 716 };
 717
 718 /** dri3_bind_extensions
 719  *
 720  * Enable all of the extensions supported on DRI3
 721  */
 722 static void
 723 dri3_bind_extensions(struct dri3_screen *psc, struct glx_display * priv,
 724                      const char *driverName)
 725 {
 726    const __DRIextension **extensions;
 727    unsigned mask;
 728    int i;
 729
 730    extensions = psc->core->getExtensions(psc->driScreen);
 731
 732    __glXEnableDirectExtension(&psc->base, "GLX_SGI_swap_control");
 733    __glXEnableDirectExtension(&psc->base, "GLX_MESA_swap_control");
 734    __glXEnableDirectExtension(&psc->base, "GLX_SGI_make_current_read");
 735    __glXEnableDirectExtension(&psc->base, "GLX_INTEL_swap_event");
 736
 737    mask = psc->image_driver->getAPIMask(psc->driScreen);
 738
 739    __glXEnableDirectExtension(&psc->base, "GLX_ARB_create_context");
 740    __glXEnableDirectExtension(&psc->base, "GLX_ARB_create_context_profile");
 741
 742    if ((mask & ((1 << __DRI_API_GLES) |
 743                 (1 << __DRI_API_GLES2) |
 744                 (1 << __DRI_API_GLES3))) != 0) {
 745       __glXEnableDirectExtension(&psc->base,
 746                                  "GLX_EXT_create_context_es_profile");
 747       __glXEnableDirectExtension(&psc->base,
 748                                  "GLX_EXT_create_context_es2_profile");
 749    }
 750
 751    for (i = 0; extensions[i]; i++) {
 752       /* when on a different gpu than the server, the server pixmaps
 753        * can have a tiling mode we can't read. Thus we can't create
 754        * a texture from them.
 755        */
 756       if (!psc->is_different_gpu &&
 757          (strcmp(extensions[i]->name, __DRI_TEX_BUFFER) == 0)) {
 758          psc->texBuffer = (__DRItexBufferExtension *) extensions[i];
 759          __glXEnableDirectExtension(&psc->base, "GLX_EXT_texture_from_pixmap");
 760       }
 761
 762       if ((strcmp(extensions[i]->name, __DRI2_FLUSH) == 0)) {
 763          psc->f = (__DRI2flushExtension *) extensions[i];
 764          /* internal driver extension, no GL extension exposed */
 765       }
 766
 767       if (strcmp(extensions[i]->name, __DRI_IMAGE) == 0)
 768          psc->image = (__DRIimageExtension *) extensions[i];
 769
 770       if ((strcmp(extensions[i]->name, __DRI2_CONFIG_QUERY) == 0))
 771          psc->config = (__DRI2configQueryExtension *) extensions[i];
 772
 773       if (strcmp(extensions[i]->name, __DRI2_ROBUSTNESS) == 0)
 774          __glXEnableDirectExtension(&psc->base,
 775                                     "GLX_ARB_create_context_robustness");
 776
 777       if (strcmp(extensions[i]->name, __DRI2_RENDERER_QUERY) == 0) {
 778          psc->rendererQuery = (__DRI2rendererQueryExtension *) extensions[i];
 779          __glXEnableDirectExtension(&psc->base, "GLX_MESA_query_renderer");
 780       }
 781
 782       if (strcmp(extensions[i]->name, __DRI2_INTEROP) == 0)
 783          psc->interop = (__DRI2interopExtension*)extensions[i];
 784
 785       if (strcmp(extensions[i]->name, __DRI2_FLUSH_CONTROL) == 0)
 786          __glXEnableDirectExtension(&psc->base,
 787                                     "GLX_ARB_context_flush_control");
 788    }
 789 }
 790
 791 static const struct glx_screen_vtable dri3_screen_vtable = {
 792    .create_context         = dri3_create_context,
 793    .create_context_attribs = dri3_create_context_attribs,
 794    .query_renderer_integer = dri3_query_renderer_integer,
 795    .query_renderer_string  = dri3_query_renderer_string,
 796 };
 797
 798 /** dri3_create_screen
 799  *
 800  * Initialize DRI3 on the specified screen.
 801  *
 802  * Opens the DRI device, locates the appropriate DRI driver
 803  * and loads that.
 804  *
 805  * Checks to see if the driver supports the necessary extensions
 806  *
 807  * Initializes the driver for the screen and sets up our structures
 808  */
 809
 810 static struct glx_screen *
 811 dri3_create_screen(int screen, struct glx_display * priv)
 812 {
 813    xcb_connection_t *c = XGetXCBConnection(priv->dpy);
 814    const __DRIconfig **driver_configs;
 815    const __DRIextension **extensions;
 816    const struct dri3_display *const pdp = (struct dri3_display *)
 817       priv->dri3Display;
 818    struct dri3_screen *psc;
 819    __GLXDRIscreen *psp;
 820    struct glx_config *configs = NULL, *visuals = NULL;
 821    char *driverName, *tmp;
 822    int i;
 823    unsigned char disable;
 824
 825    psc = calloc(1, sizeof *psc);
 826    if (psc == NULL)
 827       return NULL;
 828
 829    psc->fd = -1;
 830
 831    if (!glx_screen_init(&psc->base, screen, priv)) {
 832       free(psc);
 833       return NULL;
 834    }
 835
 836    psc->fd = loader_dri3_open(c, RootWindow(priv->dpy, screen), None);
 837    if (psc->fd < 0) {
 838       int conn_error = xcb_connection_has_error(c);
 839
 840       glx_screen_cleanup(&psc->base);
 841       free(psc);
 842       InfoMessageF("screen %d does not appear to be DRI3 capable\n", screen);
 843
 844       if (conn_error)
 845          ErrorMessageF("Connection closed during DRI3 initialization failure");
 846
 847       return NULL;
 848    }
 849
 850    psc->fd = loader_get_user_preferred_fd(psc->fd, &psc->is_different_gpu);
 851
 852    driverName = loader_get_driver_for_fd(psc->fd);
 853    if (!driverName) {
 854       ErrorMessageF("No driver found\n");
 855       goto handle_error;
 856    }
 857
 858    psc->driver = driOpenDriver(driverName);
 859    if (psc->driver == NULL) {
 860       ErrorMessageF("driver pointer missing\n");
 861       goto handle_error;
 862    }
 863
 864    extensions = driGetDriverExtensions(psc->driver, driverName);
 865    if (extensions == NULL)
 866       goto handle_error;
 867
 868    for (i = 0; extensions[i]; i++) {
 869       if (strcmp(extensions[i]->name, __DRI_CORE) == 0)
 870          psc->core = (__DRIcoreExtension *) extensions[i];
 871       if (strcmp(extensions[i]->name, __DRI_IMAGE_DRIVER) == 0)
 872          psc->image_driver = (__DRIimageDriverExtension *) extensions[i];
 873    }
 874
 875
 876    if (psc->core == NULL) {
 877       ErrorMessageF("core dri driver extension not found\n");
 878       goto handle_error;
 879    }
 880
 881    if (psc->image_driver == NULL) {
 882       ErrorMessageF("image driver extension not found\n");
 883       goto handle_error;
 884    }
 885
 886    psc->driScreen =
 887       psc->image_driver->createNewScreen2(screen, psc->fd,
 888                                           pdp->loader_extensions,
 889                                           extensions,
 890                                           &driver_configs, psc);
 891
 892    if (psc->driScreen == NULL) {
 893       ErrorMessageF("failed to create dri screen\n");
 894       goto handle_error;
 895    }
 896
 897    dri3_bind_extensions(psc, priv, driverName);
 898
 899    if (!psc->image || psc->image->base.version < 7 || !psc->image->createImageFromFds) {
 900       ErrorMessageF("Version 7 or imageFromFds image extension not found\n");
 901       goto handle_error;
 902    }
 903
 904    if (!psc->f || psc->f->base.version < 4) {
 905       ErrorMessageF("Version 4 or later of flush extension not found\n");
 906       goto handle_error;
 907    }
 908
 909    if (psc->is_different_gpu && psc->image->base.version < 9) {
 910       ErrorMessageF("Different GPU, but image extension version 9 or later not found\n");
 911       goto handle_error;
 912    }
 913
 914    if (psc->is_different_gpu && !psc->image->blitImage) {
 915       ErrorMessageF("Different GPU, but blitImage not implemented for this driver\n");
 916       goto handle_error;
 917    }
 918
 919    if (!psc->is_different_gpu && (
 920        !psc->texBuffer || psc->texBuffer->base.version < 2 ||
 921        !psc->texBuffer->setTexBuffer2
 922        )) {
 923       ErrorMessageF("Version 2 or later of texBuffer extension not found\n");
 924       goto handle_error;
 925    }
 926
 927    psc->loader_dri3_ext.core = psc->core;
 928    psc->loader_dri3_ext.image_driver = psc->image_driver;
 929    psc->loader_dri3_ext.flush = psc->f;
 930    psc->loader_dri3_ext.tex_buffer = psc->texBuffer;
 931    psc->loader_dri3_ext.image = psc->image;
 932    psc->loader_dri3_ext.config = psc->config;
 933
 934    configs = driConvertConfigs(psc->core, psc->base.configs, driver_configs);
 935    visuals = driConvertConfigs(psc->core, psc->base.visuals, driver_configs);
 936
 937    if (!configs || !visuals) {
 938        ErrorMessageF("No matching fbConfigs or visuals found\n");
 939        goto handle_error;
 940    }
 941
 942    glx_config_destroy_list(psc->base.configs);
 943    psc->base.configs = configs;
 944    glx_config_destroy_list(psc->base.visuals);
 945    psc->base.visuals = visuals;
 946
 947    psc->driver_configs = driver_configs;
 948
 949    psc->base.vtable = &dri3_screen_vtable;
 950    psp = &psc->vtable;
 951    psc->base.driScreen = psp;
 952    psp->destroyScreen = dri3_destroy_screen;
 953    psp->createDrawable = dri3_create_drawable;
 954    psp->swapBuffers = dri3_swap_buffers;
 955
 956    psp->getDrawableMSC = dri3_drawable_get_msc;
 957    psp->waitForMSC = dri3_wait_for_msc;
 958    psp->waitForSBC = dri3_wait_for_sbc;
 959    psp->setSwapInterval = dri3_set_swap_interval;
 960    psp->getSwapInterval = dri3_get_swap_interval;
 961    if (psc->config->configQueryb(psc->driScreen,
 962                                  "glx_disable_oml_sync_control",
 963                                  &disable) || !disable)
 964       __glXEnableDirectExtension(&psc->base, "GLX_OML_sync_control");
 965
 966    if (psc->config->configQueryb(psc->driScreen,
 967                                  "glx_disable_sgi_video_sync",
 968                                  &disable) || !disable)
 969       __glXEnableDirectExtension(&psc->base, "GLX_SGI_video_sync");
 970
 971    psp->copySubBuffer = dri3_copy_sub_buffer;
 972    __glXEnableDirectExtension(&psc->base, "GLX_MESA_copy_sub_buffer");
 973
 974    psp->getBufferAge = dri3_get_buffer_age;
 975    if (psc->config->configQueryb(psc->driScreen,
 976                                  "glx_disable_ext_buffer_age",
 977                                  &disable) || !disable)
 978       __glXEnableDirectExtension(&psc->base, "GLX_EXT_buffer_age");
 979
 980    free(driverName);
 981
 982    tmp = getenv("LIBGL_SHOW_FPS");
 983    psc->show_fps_interval = tmp ? atoi(tmp) : 0;
 984    if (psc->show_fps_interval < 0)
 985       psc->show_fps_interval = 0;
 986
 987    InfoMessageF("Using DRI3 for screen %d\n", screen);
 988
 989    return &psc->base;
 990
 991 handle_error:
 992    CriticalErrorMessageF("failed to load driver: %s\n", driverName);
 993
 994    if (configs)
 995        glx_config_destroy_list(configs);
 996    if (visuals)
 997        glx_config_destroy_list(visuals);
 998    if (psc->driScreen)
 999        psc->core->destroyScreen(psc->driScreen);
1000    psc->driScreen = NULL;
1001    if (psc->fd >= 0)
1002       close(psc->fd);
1003    if (psc->driver)
1004       dlclose(psc->driver);
1005
1006    free(driverName);
1007    glx_screen_cleanup(&psc->base);
1008    free(psc);
1009
1010    return NULL;
1011 }
1012
1013 /** dri_destroy_display
1014  *
1015  * Called from __glXFreeDisplayPrivate.
1016  */
1017 static void
1018 dri3_destroy_display(__GLXDRIdisplay * dpy)
1019 {
1020    free(dpy);
1021 }
1022
1023 /** dri3_create_display
1024  *
1025  * Allocate, initialize and return a __DRIdisplayPrivate object.
1026  * This is called from __glXInitialize() when we are given a new
1027  * display pointer. This is public to that function, but hidden from
1028  * outside of libGL.
1029  */
1030 _X_HIDDEN __GLXDRIdisplay *
1031 dri3_create_display(Display * dpy)
1032 {
1033    struct dri3_display                  *pdp;
1034    xcb_connection_t                     *c = XGetXCBConnection(dpy);
1035    xcb_dri3_query_version_cookie_t      dri3_cookie;
1036    xcb_dri3_query_version_reply_t       *dri3_reply;
1037    xcb_present_query_version_cookie_t   present_cookie;
1038    xcb_present_query_version_reply_t    *present_reply;
1039    xcb_generic_error_t                  *error;
1040    const xcb_query_extension_reply_t    *extension;
1041
1042    xcb_prefetch_extension_data(c, &xcb_dri3_id);
1043    xcb_prefetch_extension_data(c, &xcb_present_id);
1044
1045    extension = xcb_get_extension_data(c, &xcb_dri3_id);
1046    if (!(extension && extension->present))
1047       return NULL;
1048
1049    extension = xcb_get_extension_data(c, &xcb_present_id);
1050    if (!(extension && extension->present))
1051       return NULL;
1052
1053    dri3_cookie = xcb_dri3_query_version(c,
1054                                         XCB_DRI3_MAJOR_VERSION,
1055                                         XCB_DRI3_MINOR_VERSION);
1056
1057
1058    present_cookie = xcb_present_query_version(c,
1059                                    XCB_PRESENT_MAJOR_VERSION,
1060                                    XCB_PRESENT_MINOR_VERSION);
1061
1062    pdp = malloc(sizeof *pdp);
1063    if (pdp == NULL)
1064       return NULL;
1065
1066    dri3_reply = xcb_dri3_query_version_reply(c, dri3_cookie, &error);
1067    if (!dri3_reply) {
1068       free(error);
1069       goto no_extension;
1070    }
1071
1072    pdp->dri3Major = dri3_reply->major_version;
1073    pdp->dri3Minor = dri3_reply->minor_version;
1074    free(dri3_reply);
1075
1076    present_reply = xcb_present_query_version_reply(c, present_cookie, &error);
1077    if (!present_reply) {
1078       free(error);
1079       goto no_extension;
1080    }
1081    pdp->presentMajor = present_reply->major_version;
1082    pdp->presentMinor = present_reply->minor_version;
1083    free(present_reply);
1084
1085    pdp->base.destroyDisplay = dri3_destroy_display;
1086    pdp->base.createScreen = dri3_create_screen;
1087
1088    loader_set_logger(dri_message);
1089
1090    pdp->loader_extensions = loader_extensions;
1091
1092    return &pdp->base;
1093 no_extension:
1094    free(pdp);
1095    return NULL;
1096 }
1097
1098 #endif /* GLX_DIRECT_RENDERING */