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    __GLXDRIconfigPrivate *config = (__GLXDRIconfigPrivate *) config_base;
 361    bool has_multibuffer = false;
 362 #ifdef HAVE_DRI3_MODIFIERS
 363    const struct dri3_display *const pdp = (struct dri3_display *)
 364       base->display->dri3Display;
 365 #endif
 366
 367    pdraw = calloc(1, sizeof(*pdraw));
 368    if (!pdraw)
 369       return NULL;
 370
 371    pdraw->base.destroyDrawable = dri3_destroy_drawable;
 372    pdraw->base.xDrawable = xDrawable;
 373    pdraw->base.drawable = drawable;
 374    pdraw->base.psc = &psc->base;
 375
 376 #ifdef HAVE_DRI3_MODIFIERS
 377    if ((psc->image && psc->image->base.version >= 15) &&
 378        (pdp->dri3Major > 1 || (pdp->dri3Major == 1 && pdp->dri3Minor >= 2)) &&
 379        (pdp->presentMajor > 1 ||
 380         (pdp->presentMajor == 1 && pdp->presentMinor >= 2)))
 381       has_multibuffer = true;
 382 #endif
 383
 384    (void) __glXInitialize(psc->base.dpy);
 385
 386    if (loader_dri3_drawable_init(XGetXCBConnection(base->dpy),
 387                                  xDrawable, psc->driScreen,
 388                                  psc->is_different_gpu, has_multibuffer,
 389                                  config->driConfig,
 390                                  &psc->loader_dri3_ext, &glx_dri3_vtable,
 391                                  &pdraw->loader_drawable)) {
 392       free(pdraw);
 393       return NULL;
 394    }
 395
 396    return &pdraw->base;
 397 }
 398
 399 /** dri3_wait_for_msc
 400  *
 401  * Get the X server to send an event when the target msc/divisor/remainder is
 402  * reached.
 403  */
 404 static int
 405 dri3_wait_for_msc(__GLXDRIdrawable *pdraw, int64_t target_msc, int64_t divisor,
 406                   int64_t remainder, int64_t *ust, int64_t *msc, int64_t *sbc)
 407 {
 408    struct dri3_drawable *priv = (struct dri3_drawable *) pdraw;
 409
 410    loader_dri3_wait_for_msc(&priv->loader_drawable, target_msc, divisor,
 411                             remainder, ust, msc, sbc);
 412
 413    return 1;
 414 }
 415
 416 /** dri3_drawable_get_msc
 417  *
 418  * Return the current UST/MSC/SBC triplet by asking the server
 419  * for an event
 420  */
 421 static int
 422 dri3_drawable_get_msc(struct glx_screen *psc, __GLXDRIdrawable *pdraw,
 423                       int64_t *ust, int64_t *msc, int64_t *sbc)
 424 {
 425    return dri3_wait_for_msc(pdraw, 0, 0, 0, ust, msc,sbc);
 426 }
 427
 428 /** dri3_wait_for_sbc
 429  *
 430  * Wait for the completed swap buffer count to reach the specified
 431  * target. Presumably the application knows that this will be reached with
 432  * outstanding complete events, or we're going to be here awhile.
 433  */
 434 static int
 435 dri3_wait_for_sbc(__GLXDRIdrawable *pdraw, int64_t target_sbc, int64_t *ust,
 436                   int64_t *msc, int64_t *sbc)
 437 {
 438    struct dri3_drawable *priv = (struct dri3_drawable *) pdraw;
 439
 440    return loader_dri3_wait_for_sbc(&priv->loader_drawable, target_sbc,
 441                                    ust, msc, sbc);
 442 }
 443
 444 static void
 445 dri3_copy_sub_buffer(__GLXDRIdrawable *pdraw, int x, int y,
 446                      int width, int height,
 447                      Bool flush)
 448 {
 449    struct dri3_drawable *priv = (struct dri3_drawable *) pdraw;
 450
 451    loader_dri3_copy_sub_buffer(&priv->loader_drawable, x, y,
 452                                width, height, flush);
 453 }
 454
 455 static void
 456 dri3_wait_x(struct glx_context *gc)
 457 {
 458    struct dri3_drawable *priv = (struct dri3_drawable *)
 459       GetGLXDRIDrawable(gc->currentDpy, gc->currentDrawable);
 460
 461    if (priv)
 462       loader_dri3_wait_x(&priv->loader_drawable);
 463 }
 464
 465 static void
 466 dri3_wait_gl(struct glx_context *gc)
 467 {
 468    struct dri3_drawable *priv = (struct dri3_drawable *)
 469       GetGLXDRIDrawable(gc->currentDpy, gc->currentDrawable);
 470
 471    if (priv)
 472       loader_dri3_wait_gl(&priv->loader_drawable);
 473 }
 474
 475 /**
 476  * Called by the driver when it needs to update the real front buffer with the
 477  * contents of its fake front buffer.
 478  */
 479 static void
 480 dri3_flush_front_buffer(__DRIdrawable *driDrawable, void *loaderPrivate)
 481 {
 482    struct loader_dri3_drawable *draw = loaderPrivate;
 483    struct dri3_drawable *pdraw = loader_drawable_to_dri3_drawable(draw);
 484    struct dri3_screen *psc;
 485
 486    if (!pdraw)
 487       return;
 488
 489    if (!pdraw->base.psc)
 490       return;
 491
 492    psc = (struct dri3_screen *) pdraw->base.psc;
 493
 494    (void) __glXInitialize(psc->base.dpy);
 495
 496    loader_dri3_flush(draw, __DRI2_FLUSH_DRAWABLE, __DRI2_THROTTLE_FLUSHFRONT);
 497
 498    (*psc->f->invalidate)(driDrawable);
 499    loader_dri3_wait_gl(draw);
 500 }
 501
 502 /**
 503  * Make sure all pending swapbuffers have been submitted to hardware
 504  *
 505  * \param driDrawable[in]  Pointer to the dri drawable whose swaps we are
 506  * flushing.
 507  * \param loaderPrivate[in]  Pointer to the corresponding struct
 508  * loader_dri_drawable.
 509  */
 510 static void
 511 dri3_flush_swap_buffers(__DRIdrawable *driDrawable, void *loaderPrivate)
 512 {
 513    struct loader_dri3_drawable *draw = loaderPrivate;
 514    struct dri3_drawable *pdraw = loader_drawable_to_dri3_drawable(draw);
 515    struct dri3_screen *psc;
 516
 517    if (!pdraw)
 518       return;
 519
 520    if (!pdraw->base.psc)
 521       return;
 522
 523    psc = (struct dri3_screen *) pdraw->base.psc;
 524
 525    (void) __glXInitialize(psc->base.dpy);
 526    loader_dri3_swapbuffer_barrier(draw);
 527 }
 528
 529 static void
 530 dri_set_background_context(void *loaderPrivate)
 531 {
 532    struct dri3_context *pcp = (struct dri3_context *)loaderPrivate;
 533    __glXSetCurrentContext(&pcp->base);
 534 }
 535
 536 static GLboolean
 537 dri_is_thread_safe(void *loaderPrivate)
 538 {
 539    /* Unlike DRI2, DRI3 doesn't call GetBuffers/GetBuffersWithFormat
 540     * during draw so we're safe here.
 541     */
 542    return true;
 543 }
 544
 545 /* The image loader extension record for DRI3
 546  */
 547 static const __DRIimageLoaderExtension imageLoaderExtension = {
 548    .base = { __DRI_IMAGE_LOADER, 3 },
 549
 550    .getBuffers          = loader_dri3_get_buffers,
 551    .flushFrontBuffer    = dri3_flush_front_buffer,
 552    .flushSwapBuffers    = dri3_flush_swap_buffers,
 553 };
 554
 555 const __DRIuseInvalidateExtension dri3UseInvalidate = {
 556    .base = { __DRI_USE_INVALIDATE, 1 }
 557 };
 558
 559 static const __DRIbackgroundCallableExtension driBackgroundCallable = {
 560    .base = { __DRI_BACKGROUND_CALLABLE, 2 },
 561
 562    .setBackgroundContext = dri_set_background_context,
 563    .isThreadSafe         = dri_is_thread_safe,
 564 };
 565
 566 static const __DRIextension *loader_extensions[] = {
 567    &imageLoaderExtension.base,
 568    &dri3UseInvalidate.base,
 569    &driBackgroundCallable.base,
 570    NULL
 571 };
 572
 573 /** dri3_swap_buffers
 574  *
 575  * Make the current back buffer visible using the present extension
 576  */
 577 static int64_t
 578 dri3_swap_buffers(__GLXDRIdrawable *pdraw, int64_t target_msc, int64_t divisor,
 579                   int64_t remainder, Bool flush)
 580 {
 581    struct dri3_drawable *priv = (struct dri3_drawable *) pdraw;
 582    unsigned flags = __DRI2_FLUSH_DRAWABLE;
 583
 584    if (flush)
 585       flags |= __DRI2_FLUSH_CONTEXT;
 586
 587    return loader_dri3_swap_buffers_msc(&priv->loader_drawable,
 588                                        target_msc, divisor, remainder,
 589                                        flags, false);
 590 }
 591
 592 static int
 593 dri3_get_buffer_age(__GLXDRIdrawable *pdraw)
 594 {
 595    struct dri3_drawable *priv = (struct dri3_drawable *)pdraw;
 596
 597    return loader_dri3_query_buffer_age(&priv->loader_drawable);
 598 }
 599
 600 /** dri3_destroy_screen
 601  */
 602 static void
 603 dri3_destroy_screen(struct glx_screen *base)
 604 {
 605    struct dri3_screen *psc = (struct dri3_screen *) base;
 606
 607    /* Free the direct rendering per screen data */
 608    loader_dri3_close_screen(psc->driScreen);
 609    (*psc->core->destroyScreen) (psc->driScreen);
 610    driDestroyConfigs(psc->driver_configs);
 611    close(psc->fd);
 612    free(psc);
 613 }
 614
 615 /** dri3_set_swap_interval
 616  *
 617  * Record the application swap interval specification,
 618  */
 619 static int
 620 dri3_set_swap_interval(__GLXDRIdrawable *pdraw, int interval)
 621 {
 622    assert(pdraw != NULL);
 623
 624    struct dri3_drawable *priv =  (struct dri3_drawable *) pdraw;
 625    GLint vblank_mode = DRI_CONF_VBLANK_DEF_INTERVAL_1;
 626    struct dri3_screen *psc = (struct dri3_screen *) priv->base.psc;
 627
 628    if (psc->config)
 629       psc->config->configQueryi(psc->driScreen,
 630                                 "vblank_mode", &vblank_mode);
 631
 632    switch (vblank_mode) {
 633    case DRI_CONF_VBLANK_NEVER:
 634       if (interval != 0)
 635          return GLX_BAD_VALUE;
 636       break;
 637    case DRI_CONF_VBLANK_ALWAYS_SYNC:
 638       if (interval <= 0)
 639          return GLX_BAD_VALUE;
 640       break;
 641    default:
 642       break;
 643    }
 644
 645    priv->swap_interval = interval;
 646    loader_dri3_set_swap_interval(&priv->loader_drawable, interval);
 647
 648    return 0;
 649 }
 650
 651 /** dri3_get_swap_interval
 652  *
 653  * Return the stored swap interval
 654  */
 655 static int
 656 dri3_get_swap_interval(__GLXDRIdrawable *pdraw)
 657 {
 658    assert(pdraw != NULL);
 659
 660    struct dri3_drawable *priv =  (struct dri3_drawable *) pdraw;
 661
 662   return priv->swap_interval;
 663 }
 664
 665 static void
 666 dri3_bind_tex_image(Display * dpy,
 667                     GLXDrawable drawable,
 668                     int buffer, const int *attrib_list)
 669 {
 670    struct glx_context *gc = __glXGetCurrentContext();
 671    struct dri3_context *pcp = (struct dri3_context *) gc;
 672    __GLXDRIdrawable *base = GetGLXDRIDrawable(dpy, drawable);
 673    struct dri3_drawable *pdraw = (struct dri3_drawable *) base;
 674    struct dri3_screen *psc;
 675
 676    if (pdraw != NULL) {
 677       psc = (struct dri3_screen *) base->psc;
 678
 679       (*psc->f->invalidate)(pdraw->loader_drawable.dri_drawable);
 680
 681       XSync(dpy, false);
 682
 683       (*psc->texBuffer->setTexBuffer2) (pcp->driContext,
 684                                         pdraw->base.textureTarget,
 685                                         pdraw->base.textureFormat,
 686                                         pdraw->loader_drawable.dri_drawable);
 687    }
 688 }
 689
 690 static void
 691 dri3_release_tex_image(Display * dpy, GLXDrawable drawable, int buffer)
 692 {
 693    struct glx_context *gc = __glXGetCurrentContext();
 694    struct dri3_context *pcp = (struct dri3_context *) gc;
 695    __GLXDRIdrawable *base = GetGLXDRIDrawable(dpy, drawable);
 696    struct dri3_drawable *pdraw = (struct dri3_drawable *) base;
 697    struct dri3_screen *psc;
 698
 699    if (pdraw != NULL) {
 700       psc = (struct dri3_screen *) base->psc;
 701
 702       if (psc->texBuffer->base.version >= 3 &&
 703           psc->texBuffer->releaseTexBuffer != NULL)
 704          (*psc->texBuffer->releaseTexBuffer) (pcp->driContext,
 705                                               pdraw->base.textureTarget,
 706                                               pdraw->loader_drawable.dri_drawable);
 707    }
 708 }
 709
 710 static const struct glx_context_vtable dri3_context_vtable = {
 711    .destroy             = dri3_destroy_context,
 712    .bind                = dri3_bind_context,
 713    .unbind              = dri3_unbind_context,
 714    .wait_gl             = dri3_wait_gl,
 715    .wait_x              = dri3_wait_x,
 716    .use_x_font          = DRI_glXUseXFont,
 717    .bind_tex_image      = dri3_bind_tex_image,
 718    .release_tex_image   = dri3_release_tex_image,
 719    .get_proc_address    = NULL,
 720    .interop_query_device_info = dri3_interop_query_device_info,
 721    .interop_export_object = dri3_interop_export_object
 722 };
 723
 724 /** dri3_bind_extensions
 725  *
 726  * Enable all of the extensions supported on DRI3
 727  */
 728 static void
 729 dri3_bind_extensions(struct dri3_screen *psc, struct glx_display * priv,
 730                      const char *driverName)
 731 {
 732    const __DRIextension **extensions;
 733    unsigned mask;
 734    int i;
 735
 736    extensions = psc->core->getExtensions(psc->driScreen);
 737
 738    __glXEnableDirectExtension(&psc->base, "GLX_SGI_swap_control");
 739    __glXEnableDirectExtension(&psc->base, "GLX_MESA_swap_control");
 740    __glXEnableDirectExtension(&psc->base, "GLX_SGI_make_current_read");
 741    __glXEnableDirectExtension(&psc->base, "GLX_INTEL_swap_event");
 742
 743    mask = psc->image_driver->getAPIMask(psc->driScreen);
 744
 745    __glXEnableDirectExtension(&psc->base, "GLX_ARB_create_context");
 746    __glXEnableDirectExtension(&psc->base, "GLX_ARB_create_context_profile");
 747
 748    if ((mask & ((1 << __DRI_API_GLES) |
 749                 (1 << __DRI_API_GLES2) |
 750                 (1 << __DRI_API_GLES3))) != 0) {
 751       __glXEnableDirectExtension(&psc->base,
 752                                  "GLX_EXT_create_context_es_profile");
 753       __glXEnableDirectExtension(&psc->base,
 754                                  "GLX_EXT_create_context_es2_profile");
 755    }
 756
 757    for (i = 0; extensions[i]; i++) {
 758       /* when on a different gpu than the server, the server pixmaps
 759        * can have a tiling mode we can't read. Thus we can't create
 760        * a texture from them.
 761        */
 762       if (!psc->is_different_gpu &&
 763          (strcmp(extensions[i]->name, __DRI_TEX_BUFFER) == 0)) {
 764          psc->texBuffer = (__DRItexBufferExtension *) extensions[i];
 765          __glXEnableDirectExtension(&psc->base, "GLX_EXT_texture_from_pixmap");
 766       }
 767
 768       if ((strcmp(extensions[i]->name, __DRI2_FLUSH) == 0)) {
 769          psc->f = (__DRI2flushExtension *) extensions[i];
 770          /* internal driver extension, no GL extension exposed */
 771       }
 772
 773       if (strcmp(extensions[i]->name, __DRI_IMAGE) == 0)
 774          psc->image = (__DRIimageExtension *) extensions[i];
 775
 776       if ((strcmp(extensions[i]->name, __DRI2_CONFIG_QUERY) == 0))
 777          psc->config = (__DRI2configQueryExtension *) extensions[i];
 778
 779       if (strcmp(extensions[i]->name, __DRI2_ROBUSTNESS) == 0)
 780          __glXEnableDirectExtension(&psc->base,
 781                                     "GLX_ARB_create_context_robustness");
 782
 783       if (strcmp(extensions[i]->name, __DRI2_RENDERER_QUERY) == 0) {
 784          psc->rendererQuery = (__DRI2rendererQueryExtension *) extensions[i];
 785          __glXEnableDirectExtension(&psc->base, "GLX_MESA_query_renderer");
 786       }
 787
 788       if (strcmp(extensions[i]->name, __DRI2_INTEROP) == 0)
 789          psc->interop = (__DRI2interopExtension*)extensions[i];
 790
 791       if (strcmp(extensions[i]->name, __DRI2_FLUSH_CONTROL) == 0)
 792          __glXEnableDirectExtension(&psc->base,
 793                                     "GLX_ARB_context_flush_control");
 794    }
 795 }
 796
 797 static const struct glx_screen_vtable dri3_screen_vtable = {
 798    .create_context         = dri3_create_context,
 799    .create_context_attribs = dri3_create_context_attribs,
 800    .query_renderer_integer = dri3_query_renderer_integer,
 801    .query_renderer_string  = dri3_query_renderer_string,
 802 };
 803
 804 /** dri3_create_screen
 805  *
 806  * Initialize DRI3 on the specified screen.
 807  *
 808  * Opens the DRI device, locates the appropriate DRI driver
 809  * and loads that.
 810  *
 811  * Checks to see if the driver supports the necessary extensions
 812  *
 813  * Initializes the driver for the screen and sets up our structures
 814  */
 815
 816 static struct glx_screen *
 817 dri3_create_screen(int screen, struct glx_display * priv)
 818 {
 819    xcb_connection_t *c = XGetXCBConnection(priv->dpy);
 820    const __DRIconfig **driver_configs;
 821    const __DRIextension **extensions;
 822    const struct dri3_display *const pdp = (struct dri3_display *)
 823       priv->dri3Display;
 824    struct dri3_screen *psc;
 825    __GLXDRIscreen *psp;
 826    struct glx_config *configs = NULL, *visuals = NULL;
 827    char *driverName, *tmp;
 828    int i;
 829    unsigned char disable;
 830
 831    psc = calloc(1, sizeof *psc);
 832    if (psc == NULL)
 833       return NULL;
 834
 835    psc->fd = -1;
 836
 837    if (!glx_screen_init(&psc->base, screen, priv)) {
 838       free(psc);
 839       return NULL;
 840    }
 841
 842    psc->fd = loader_dri3_open(c, RootWindow(priv->dpy, screen), None);
 843    if (psc->fd < 0) {
 844       int conn_error = xcb_connection_has_error(c);
 845
 846       glx_screen_cleanup(&psc->base);
 847       free(psc);
 848       InfoMessageF("screen %d does not appear to be DRI3 capable\n", screen);
 849
 850       if (conn_error)
 851          ErrorMessageF("Connection closed during DRI3 initialization failure");
 852
 853       return NULL;
 854    }
 855
 856    psc->fd = loader_get_user_preferred_fd(psc->fd, &psc->is_different_gpu);
 857
 858    driverName = loader_get_driver_for_fd(psc->fd);
 859    if (!driverName) {
 860       ErrorMessageF("No driver found\n");
 861       goto handle_error;
 862    }
 863
 864    psc->driver = driOpenDriver(driverName);
 865    if (psc->driver == NULL) {
 866       ErrorMessageF("driver pointer missing\n");
 867       goto handle_error;
 868    }
 869
 870    extensions = driGetDriverExtensions(psc->driver, driverName);
 871    if (extensions == NULL)
 872       goto handle_error;
 873
 874    for (i = 0; extensions[i]; i++) {
 875       if (strcmp(extensions[i]->name, __DRI_CORE) == 0)
 876          psc->core = (__DRIcoreExtension *) extensions[i];
 877       if (strcmp(extensions[i]->name, __DRI_IMAGE_DRIVER) == 0)
 878          psc->image_driver = (__DRIimageDriverExtension *) extensions[i];
 879    }
 880
 881
 882    if (psc->core == NULL) {
 883       ErrorMessageF("core dri driver extension not found\n");
 884       goto handle_error;
 885    }
 886
 887    if (psc->image_driver == NULL) {
 888       ErrorMessageF("image driver extension not found\n");
 889       goto handle_error;
 890    }
 891
 892    psc->driScreen =
 893       psc->image_driver->createNewScreen2(screen, psc->fd,
 894                                           pdp->loader_extensions,
 895                                           extensions,
 896                                           &driver_configs, psc);
 897
 898    if (psc->driScreen == NULL) {
 899       ErrorMessageF("failed to create dri screen\n");
 900       goto handle_error;
 901    }
 902
 903    dri3_bind_extensions(psc, priv, driverName);
 904
 905    if (!psc->image || psc->image->base.version < 7 || !psc->image->createImageFromFds) {
 906       ErrorMessageF("Version 7 or imageFromFds image extension not found\n");
 907       goto handle_error;
 908    }
 909
 910    if (!psc->f || psc->f->base.version < 4) {
 911       ErrorMessageF("Version 4 or later of flush extension not found\n");
 912       goto handle_error;
 913    }
 914
 915    if (psc->is_different_gpu && psc->image->base.version < 9) {
 916       ErrorMessageF("Different GPU, but image extension version 9 or later not found\n");
 917       goto handle_error;
 918    }
 919
 920    if (psc->is_different_gpu && !psc->image->blitImage) {
 921       ErrorMessageF("Different GPU, but blitImage not implemented for this driver\n");
 922       goto handle_error;
 923    }
 924
 925    if (!psc->is_different_gpu && (
 926        !psc->texBuffer || psc->texBuffer->base.version < 2 ||
 927        !psc->texBuffer->setTexBuffer2
 928        )) {
 929       ErrorMessageF("Version 2 or later of texBuffer extension not found\n");
 930       goto handle_error;
 931    }
 932
 933    psc->loader_dri3_ext.core = psc->core;
 934    psc->loader_dri3_ext.image_driver = psc->image_driver;
 935    psc->loader_dri3_ext.flush = psc->f;
 936    psc->loader_dri3_ext.tex_buffer = psc->texBuffer;
 937    psc->loader_dri3_ext.image = psc->image;
 938    psc->loader_dri3_ext.config = psc->config;
 939
 940    configs = driConvertConfigs(psc->core, psc->base.configs, driver_configs);
 941    visuals = driConvertConfigs(psc->core, psc->base.visuals, driver_configs);
 942
 943    if (!configs || !visuals) {
 944        ErrorMessageF("No matching fbConfigs or visuals found\n");
 945        goto handle_error;
 946    }
 947
 948    glx_config_destroy_list(psc->base.configs);
 949    psc->base.configs = configs;
 950    glx_config_destroy_list(psc->base.visuals);
 951    psc->base.visuals = visuals;
 952
 953    psc->driver_configs = driver_configs;
 954
 955    psc->base.vtable = &dri3_screen_vtable;
 956    psp = &psc->vtable;
 957    psc->base.driScreen = psp;
 958    psp->destroyScreen = dri3_destroy_screen;
 959    psp->createDrawable = dri3_create_drawable;
 960    psp->swapBuffers = dri3_swap_buffers;
 961
 962    psp->getDrawableMSC = dri3_drawable_get_msc;
 963    psp->waitForMSC = dri3_wait_for_msc;
 964    psp->waitForSBC = dri3_wait_for_sbc;
 965    psp->setSwapInterval = dri3_set_swap_interval;
 966    psp->getSwapInterval = dri3_get_swap_interval;
 967    if (psc->config->configQueryb(psc->driScreen,
 968                                  "glx_disable_oml_sync_control",
 969                                  &disable) || !disable)
 970       __glXEnableDirectExtension(&psc->base, "GLX_OML_sync_control");
 971
 972    if (psc->config->configQueryb(psc->driScreen,
 973                                  "glx_disable_sgi_video_sync",
 974                                  &disable) || !disable)
 975       __glXEnableDirectExtension(&psc->base, "GLX_SGI_video_sync");
 976
 977    psp->copySubBuffer = dri3_copy_sub_buffer;
 978    __glXEnableDirectExtension(&psc->base, "GLX_MESA_copy_sub_buffer");
 979
 980    psp->getBufferAge = dri3_get_buffer_age;
 981    if (psc->config->configQueryb(psc->driScreen,
 982                                  "glx_disable_ext_buffer_age",
 983                                  &disable) || !disable)
 984       __glXEnableDirectExtension(&psc->base, "GLX_EXT_buffer_age");
 985
 986    free(driverName);
 987
 988    tmp = getenv("LIBGL_SHOW_FPS");
 989    psc->show_fps_interval = tmp ? atoi(tmp) : 0;
 990    if (psc->show_fps_interval < 0)
 991       psc->show_fps_interval = 0;
 992
 993    InfoMessageF("Using DRI3 for screen %d\n", screen);
 994
 995    return &psc->base;
 996
 997 handle_error:
 998    CriticalErrorMessageF("failed to load driver: %s\n", driverName);
 999
1000    if (configs)
1001        glx_config_destroy_list(configs);
1002    if (visuals)
1003        glx_config_destroy_list(visuals);
1004    if (psc->driScreen)
1005        psc->core->destroyScreen(psc->driScreen);
1006    psc->driScreen = NULL;
1007    if (psc->fd >= 0)
1008       close(psc->fd);
1009    if (psc->driver)
1010       dlclose(psc->driver);
1011
1012    free(driverName);
1013    glx_screen_cleanup(&psc->base);
1014    free(psc);
1015
1016    return NULL;
1017 }
1018
1019 /** dri_destroy_display
1020  *
1021  * Called from __glXFreeDisplayPrivate.
1022  */
1023 static void
1024 dri3_destroy_display(__GLXDRIdisplay * dpy)
1025 {
1026    free(dpy);
1027 }
1028
1029 /* Only request versions of these protocols which we actually support. */
1030 #define DRI3_SUPPORTED_MAJOR 1
1031 #define PRESENT_SUPPORTED_MAJOR 1
1032
1033 #ifdef HAVE_DRI3_MODIFIERS
1034 #define DRI3_SUPPORTED_MINOR 2
1035 #define PRESENT_SUPPORTED_MINOR 2
1036 #else
1037 #define PRESENT_SUPPORTED_MINOR 0
1038 #define DRI3_SUPPORTED_MINOR 0
1039 #endif
1040
1041 /** dri3_create_display
1042  *
1043  * Allocate, initialize and return a __DRIdisplayPrivate object.
1044  * This is called from __glXInitialize() when we are given a new
1045  * display pointer. This is public to that function, but hidden from
1046  * outside of libGL.
1047  */
1048 _X_HIDDEN __GLXDRIdisplay *
1049 dri3_create_display(Display * dpy)
1050 {
1051    struct dri3_display                  *pdp;
1052    xcb_connection_t                     *c = XGetXCBConnection(dpy);
1053    xcb_dri3_query_version_cookie_t      dri3_cookie;
1054    xcb_dri3_query_version_reply_t       *dri3_reply;
1055    xcb_present_query_version_cookie_t   present_cookie;
1056    xcb_present_query_version_reply_t    *present_reply;
1057    xcb_generic_error_t                  *error;
1058    const xcb_query_extension_reply_t    *extension;
1059
1060    xcb_prefetch_extension_data(c, &xcb_dri3_id);
1061    xcb_prefetch_extension_data(c, &xcb_present_id);
1062
1063    extension = xcb_get_extension_data(c, &xcb_dri3_id);
1064    if (!(extension && extension->present))
1065       return NULL;
1066
1067    extension = xcb_get_extension_data(c, &xcb_present_id);
1068    if (!(extension && extension->present))
1069       return NULL;
1070
1071    dri3_cookie = xcb_dri3_query_version(c,
1072                                         DRI3_SUPPORTED_MAJOR,
1073                                         DRI3_SUPPORTED_MINOR);
1074    present_cookie = xcb_present_query_version(c,
1075                                               PRESENT_SUPPORTED_MAJOR,
1076                                               PRESENT_SUPPORTED_MINOR);
1077
1078    pdp = malloc(sizeof *pdp);
1079    if (pdp == NULL)
1080       return NULL;
1081
1082    dri3_reply = xcb_dri3_query_version_reply(c, dri3_cookie, &error);
1083    if (!dri3_reply) {
1084       free(error);
1085       goto no_extension;
1086    }
1087
1088    pdp->dri3Major = dri3_reply->major_version;
1089    pdp->dri3Minor = dri3_reply->minor_version;
1090    free(dri3_reply);
1091
1092    present_reply = xcb_present_query_version_reply(c, present_cookie, &error);
1093    if (!present_reply) {
1094       free(error);
1095       goto no_extension;
1096    }
1097    pdp->presentMajor = present_reply->major_version;
1098    pdp->presentMinor = present_reply->minor_version;
1099    free(present_reply);
1100
1101    pdp->base.destroyDisplay = dri3_destroy_display;
1102    pdp->base.createScreen = dri3_create_screen;
1103
1104    loader_set_logger(dri_message);
1105
1106    pdp->loader_extensions = loader_extensions;
1107
1108    return &pdp->base;
1109 no_extension:
1110    free(pdp);
1111    return NULL;
1112 }
1113
1114 #endif /* GLX_DIRECT_RENDERING */