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 int
  90 glx_dri3_get_swap_interval(struct loader_dri3_drawable *draw)
  91 {
  92    struct dri3_drawable *priv = loader_drawable_to_dri3_drawable(draw);
  93
  94    return priv->swap_interval;
  95 }
  96
  97 static int
  98 glx_dri3_clamp_swap_interval(struct loader_dri3_drawable *draw, int interval)
  99 {
 100    return interval;
 101 }
 102
 103 static void
 104 glx_dri3_set_swap_interval(struct loader_dri3_drawable *draw, int interval)
 105 {
 106    struct dri3_drawable *priv = loader_drawable_to_dri3_drawable(draw);
 107
 108    priv->swap_interval = interval;
 109 }
 110
 111 static void
 112 glx_dri3_set_drawable_size(struct loader_dri3_drawable *draw,
 113                            int width, int height)
 114 {
 115    /* Nothing to do */
 116 }
 117
 118 static bool
 119 glx_dri3_in_current_context(struct loader_dri3_drawable *draw)
 120 {
 121    struct dri3_drawable *priv = loader_drawable_to_dri3_drawable(draw);
 122
 123    if (!priv)
 124       return false;
 125
 126    struct dri3_context *pcp = (struct dri3_context *) __glXGetCurrentContext();
 127    struct dri3_screen *psc = (struct dri3_screen *) priv->base.psc;
 128
 129    return (&pcp->base != &dummyContext) && pcp->base.psc == &psc->base;
 130 }
 131
 132 static __DRIcontext *
 133 glx_dri3_get_dri_context(struct loader_dri3_drawable *draw)
 134 {
 135    struct glx_context *gc = __glXGetCurrentContext();
 136    struct dri3_context *dri3Ctx = (struct dri3_context *) gc;
 137
 138    return (gc != &dummyContext) ? dri3Ctx->driContext : NULL;
 139 }
 140
 141 static __DRIscreen *
 142 glx_dri3_get_dri_screen(struct loader_dri3_drawable *draw)
 143 {
 144    struct glx_context *gc = __glXGetCurrentContext();
 145    struct dri3_context *pcp = (struct dri3_context *) gc;
 146    struct dri3_screen *psc = (struct dri3_screen *) pcp->base.psc;
 147
 148    return (gc != &dummyContext && psc) ? psc->driScreen : NULL;
 149 }
 150
 151 static void
 152 glx_dri3_flush_drawable(struct loader_dri3_drawable *draw, unsigned flags)
 153 {
 154    loader_dri3_flush(draw, flags, __DRI2_THROTTLE_SWAPBUFFER);
 155 }
 156
 157 static void
 158 glx_dri3_show_fps(struct loader_dri3_drawable *draw, uint64_t current_ust)
 159 {
 160    struct dri3_drawable *priv = loader_drawable_to_dri3_drawable(draw);
 161    const uint64_t interval =
 162       ((struct dri3_screen *) priv->base.psc)->show_fps_interval;
 163
 164    if (!interval)
 165       return;
 166
 167    priv->frames++;
 168
 169    /* DRI3+Present together uses microseconds for UST. */
 170    if (priv->previous_ust + interval * 1000000 <= current_ust) {
 171       if (priv->previous_ust) {
 172          fprintf(stderr, "libGL: FPS = %.1f\n",
 173                  ((uint64_t) priv->frames * 1000000) /
 174                  (double)(current_ust - priv->previous_ust));
 175       }
 176       priv->frames = 0;
 177       priv->previous_ust = current_ust;
 178    }
 179 }
 180
 181 static const struct loader_dri3_vtable glx_dri3_vtable = {
 182    .get_swap_interval = glx_dri3_get_swap_interval,
 183    .clamp_swap_interval = glx_dri3_clamp_swap_interval,
 184    .set_swap_interval = glx_dri3_set_swap_interval,
 185    .set_drawable_size = glx_dri3_set_drawable_size,
 186    .in_current_context = glx_dri3_in_current_context,
 187    .get_dri_context = glx_dri3_get_dri_context,
 188    .get_dri_screen = glx_dri3_get_dri_screen,
 189    .flush_drawable = glx_dri3_flush_drawable,
 190    .show_fps = glx_dri3_show_fps,
 191 };
 192
 193
 194 static const struct glx_context_vtable dri3_context_vtable;
 195
 196 static void
 197 dri3_destroy_context(struct glx_context *context)
 198 {
 199    struct dri3_context *pcp = (struct dri3_context *) context;
 200    struct dri3_screen *psc = (struct dri3_screen *) context->psc;
 201
 202    driReleaseDrawables(&pcp->base);
 203
 204    free((char *) context->extensions);
 205
 206    (*psc->core->destroyContext) (pcp->driContext);
 207
 208    free(pcp);
 209 }
 210
 211 static Bool
 212 dri3_bind_context(struct glx_context *context, struct glx_context *old,
 213                   GLXDrawable draw, GLXDrawable read)
 214 {
 215    struct dri3_context *pcp = (struct dri3_context *) context;
 216    struct dri3_screen *psc = (struct dri3_screen *) pcp->base.psc;
 217    struct dri3_drawable *pdraw, *pread;
 218    __DRIdrawable *dri_draw = NULL, *dri_read = NULL;
 219
 220    pdraw = (struct dri3_drawable *) driFetchDrawable(context, draw);
 221    pread = (struct dri3_drawable *) driFetchDrawable(context, read);
 222
 223    driReleaseDrawables(&pcp->base);
 224
 225    if (pdraw)
 226       dri_draw = pdraw->loader_drawable.dri_drawable;
 227    else if (draw != None)
 228       return GLXBadDrawable;
 229
 230    if (pread)
 231       dri_read = pread->loader_drawable.dri_drawable;
 232    else if (read != None)
 233       return GLXBadDrawable;
 234
 235    if (!(*psc->core->bindContext) (pcp->driContext, dri_draw, dri_read))
 236       return GLXBadContext;
 237
 238    return Success;
 239 }
 240
 241 static void
 242 dri3_unbind_context(struct glx_context *context, struct glx_context *new)
 243 {
 244    struct dri3_context *pcp = (struct dri3_context *) context;
 245    struct dri3_screen *psc = (struct dri3_screen *) pcp->base.psc;
 246
 247    (*psc->core->unbindContext) (pcp->driContext);
 248 }
 249
 250 static struct glx_context *
 251 dri3_create_context_attribs(struct glx_screen *base,
 252                             struct glx_config *config_base,
 253                             struct glx_context *shareList,
 254                             unsigned num_attribs,
 255                             const uint32_t *attribs,
 256                             unsigned *error)
 257 {
 258    struct dri3_context *pcp = NULL;
 259    struct dri3_context *pcp_shared = NULL;
 260    struct dri3_screen *psc = (struct dri3_screen *) base;
 261    __GLXDRIconfigPrivate *config = (__GLXDRIconfigPrivate *) config_base;
 262    __DRIcontext *shared = NULL;
 263
 264    uint32_t minor_ver = 1;
 265    uint32_t major_ver = 2;
 266    uint32_t flags = 0;
 267    unsigned api;
 268    int reset = __DRI_CTX_RESET_NO_NOTIFICATION;
 269    uint32_t ctx_attribs[2 * 5];
 270    unsigned num_ctx_attribs = 0;
 271    uint32_t render_type;
 272
 273    /* Remap the GLX tokens to DRI2 tokens.
 274     */
 275    if (!dri2_convert_glx_attribs(num_attribs, attribs,
 276                                  &major_ver, &minor_ver,
 277                                  &render_type, &flags, &api,
 278                                  &reset, error))
 279       goto error_exit;
 280
 281    /* Check the renderType value */
 282    if (!validate_renderType_against_config(config_base, render_type))
 283        goto error_exit;
 284
 285    if (shareList) {
 286       pcp_shared = (struct dri3_context *) shareList;
 287       shared = pcp_shared->driContext;
 288    }
 289
 290    pcp = calloc(1, sizeof *pcp);
 291    if (pcp == NULL) {
 292       *error = __DRI_CTX_ERROR_NO_MEMORY;
 293       goto error_exit;
 294    }
 295
 296    if (!glx_context_init(&pcp->base, &psc->base, &config->base))
 297       goto error_exit;
 298
 299    ctx_attribs[num_ctx_attribs++] = __DRI_CTX_ATTRIB_MAJOR_VERSION;
 300    ctx_attribs[num_ctx_attribs++] = major_ver;
 301    ctx_attribs[num_ctx_attribs++] = __DRI_CTX_ATTRIB_MINOR_VERSION;
 302    ctx_attribs[num_ctx_attribs++] = minor_ver;
 303
 304    /* Only send a value when the non-default value is requested.  By doing
 305     * this we don't have to check the driver's DRI3 version before sending the
 306     * default value.
 307     */
 308    if (reset != __DRI_CTX_RESET_NO_NOTIFICATION) {
 309       ctx_attribs[num_ctx_attribs++] = __DRI_CTX_ATTRIB_RESET_STRATEGY;
 310       ctx_attribs[num_ctx_attribs++] = reset;
 311    }
 312
 313    if (flags != 0) {
 314       ctx_attribs[num_ctx_attribs++] = __DRI_CTX_ATTRIB_FLAGS;
 315
 316       /* The current __DRI_CTX_FLAG_* values are identical to the
 317        * GLX_CONTEXT_*_BIT values.
 318        */
 319       ctx_attribs[num_ctx_attribs++] = flags;
 320    }
 321
 322    pcp->driContext =
 323       (*psc->image_driver->createContextAttribs) (psc->driScreen,
 324                                                   api,
 325                                                   config->driConfig,
 326                                                   shared,
 327                                                   num_ctx_attribs / 2,
 328                                                   ctx_attribs,
 329                                                   error,
 330                                                   pcp);
 331
 332    if (pcp->driContext == NULL)
 333       goto error_exit;
 334
 335    pcp->base.vtable = &dri3_context_vtable;
 336
 337    return &pcp->base;
 338
 339 error_exit:
 340    free(pcp);
 341
 342    return NULL;
 343 }
 344
 345 static struct glx_context *
 346 dri3_create_context(struct glx_screen *base,
 347                     struct glx_config *config_base,
 348                     struct glx_context *shareList, int renderType)
 349 {
 350    unsigned int error;
 351
 352    return dri3_create_context_attribs(base, config_base, shareList,
 353                                       0, NULL, &error);
 354 }
 355
 356 static void
 357 dri3_destroy_drawable(__GLXDRIdrawable *base)
 358 {
 359    struct dri3_drawable *pdraw = (struct dri3_drawable *) base;
 360
 361    loader_dri3_drawable_fini(&pdraw->loader_drawable);
 362
 363    free(pdraw);
 364 }
 365
 366 static __GLXDRIdrawable *
 367 dri3_create_drawable(struct glx_screen *base, XID xDrawable,
 368                      GLXDrawable drawable, struct glx_config *config_base)
 369 {
 370    struct dri3_drawable *pdraw;
 371    struct dri3_screen *psc = (struct dri3_screen *) base;
 372    __GLXDRIconfigPrivate *config = (__GLXDRIconfigPrivate *) config_base;
 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    (void) __glXInitialize(psc->base.dpy);
 384
 385    if (loader_dri3_drawable_init(XGetXCBConnection(base->dpy),
 386                                  xDrawable, psc->driScreen,
 387                                  psc->is_different_gpu, config->driConfig,
 388                                  &psc->loader_dri3_ext, &glx_dri3_vtable,
 389                                  &pdraw->loader_drawable)) {
 390       free(pdraw);
 391       return NULL;
 392    }
 393
 394    return &pdraw->base;
 395 }
 396
 397 /** dri3_wait_for_msc
 398  *
 399  * Get the X server to send an event when the target msc/divisor/remainder is
 400  * reached.
 401  */
 402 static int
 403 dri3_wait_for_msc(__GLXDRIdrawable *pdraw, int64_t target_msc, int64_t divisor,
 404                   int64_t remainder, int64_t *ust, int64_t *msc, int64_t *sbc)
 405 {
 406    struct dri3_drawable *priv = (struct dri3_drawable *) pdraw;
 407
 408    loader_dri3_wait_for_msc(&priv->loader_drawable, target_msc, divisor,
 409                             remainder, ust, msc, sbc);
 410
 411    return 1;
 412 }
 413
 414 /** dri3_drawable_get_msc
 415  *
 416  * Return the current UST/MSC/SBC triplet by asking the server
 417  * for an event
 418  */
 419 static int
 420 dri3_drawable_get_msc(struct glx_screen *psc, __GLXDRIdrawable *pdraw,
 421                       int64_t *ust, int64_t *msc, int64_t *sbc)
 422 {
 423    return dri3_wait_for_msc(pdraw, 0, 0, 0, ust, msc,sbc);
 424 }
 425
 426 /** dri3_wait_for_sbc
 427  *
 428  * Wait for the completed swap buffer count to reach the specified
 429  * target. Presumably the application knows that this will be reached with
 430  * outstanding complete events, or we're going to be here awhile.
 431  */
 432 static int
 433 dri3_wait_for_sbc(__GLXDRIdrawable *pdraw, int64_t target_sbc, int64_t *ust,
 434                   int64_t *msc, int64_t *sbc)
 435 {
 436    struct dri3_drawable *priv = (struct dri3_drawable *) pdraw;
 437
 438    return loader_dri3_wait_for_sbc(&priv->loader_drawable, target_sbc,
 439                                    ust, msc, sbc);
 440 }
 441
 442 static void
 443 dri3_copy_sub_buffer(__GLXDRIdrawable *pdraw, int x, int y,
 444                      int width, int height,
 445                      Bool flush)
 446 {
 447    struct dri3_drawable *priv = (struct dri3_drawable *) pdraw;
 448
 449    loader_dri3_copy_sub_buffer(&priv->loader_drawable, x, y,
 450                                width, height, flush);
 451 }
 452
 453 static void
 454 dri3_wait_x(struct glx_context *gc)
 455 {
 456    struct dri3_drawable *priv = (struct dri3_drawable *)
 457       GetGLXDRIDrawable(gc->currentDpy, gc->currentDrawable);
 458
 459    if (priv)
 460       loader_dri3_wait_x(&priv->loader_drawable);
 461 }
 462
 463 static void
 464 dri3_wait_gl(struct glx_context *gc)
 465 {
 466    struct dri3_drawable *priv = (struct dri3_drawable *)
 467       GetGLXDRIDrawable(gc->currentDpy, gc->currentDrawable);
 468
 469    if (priv)
 470       loader_dri3_wait_gl(&priv->loader_drawable);
 471 }
 472
 473 /**
 474  * Called by the driver when it needs to update the real front buffer with the
 475  * contents of its fake front buffer.
 476  */
 477 static void
 478 dri3_flush_front_buffer(__DRIdrawable *driDrawable, void *loaderPrivate)
 479 {
 480    struct loader_dri3_drawable *draw = loaderPrivate;
 481    struct dri3_drawable *pdraw = loader_drawable_to_dri3_drawable(draw);
 482    struct dri3_screen *psc;
 483
 484    if (!pdraw)
 485       return;
 486
 487    if (!pdraw->base.psc)
 488       return;
 489
 490    psc = (struct dri3_screen *) pdraw->base.psc;
 491
 492    (void) __glXInitialize(psc->base.dpy);
 493
 494    loader_dri3_flush(draw, __DRI2_FLUSH_DRAWABLE, __DRI2_THROTTLE_FLUSHFRONT);
 495
 496    loader_dri3_wait_gl(draw);
 497 }
 498
 499 /* The image loader extension record for DRI3
 500  */
 501 static const __DRIimageLoaderExtension imageLoaderExtension = {
 502    .base = { __DRI_IMAGE_LOADER, 1 },
 503
 504    .getBuffers          = loader_dri3_get_buffers,
 505    .flushFrontBuffer    = dri3_flush_front_buffer,
 506 };
 507
 508 const __DRIuseInvalidateExtension dri3UseInvalidate = {
 509    .base = { __DRI_USE_INVALIDATE, 1 }
 510 };
 511
 512 static const __DRIextension *loader_extensions[] = {
 513    &imageLoaderExtension.base,
 514    &systemTimeExtension.base,
 515    &dri3UseInvalidate.base,
 516    NULL
 517 };
 518
 519 /** dri3_swap_buffers
 520  *
 521  * Make the current back buffer visible using the present extension
 522  */
 523 static int64_t
 524 dri3_swap_buffers(__GLXDRIdrawable *pdraw, int64_t target_msc, int64_t divisor,
 525                   int64_t remainder, Bool flush)
 526 {
 527    struct dri3_drawable *priv = (struct dri3_drawable *) pdraw;
 528    unsigned flags = __DRI2_FLUSH_DRAWABLE;
 529
 530    if (flush)
 531       flags |= __DRI2_FLUSH_CONTEXT;
 532
 533    return loader_dri3_swap_buffers_msc(&priv->loader_drawable,
 534                                        target_msc, divisor, remainder,
 535                                        flags, false);
 536 }
 537
 538 static int
 539 dri3_get_buffer_age(__GLXDRIdrawable *pdraw)
 540 {
 541    struct dri3_drawable *priv = (struct dri3_drawable *)pdraw;
 542
 543    return loader_dri3_query_buffer_age(&priv->loader_drawable);
 544 }
 545
 546 /** dri3_destroy_screen
 547  */
 548 static void
 549 dri3_destroy_screen(struct glx_screen *base)
 550 {
 551    struct dri3_screen *psc = (struct dri3_screen *) base;
 552
 553    /* Free the direct rendering per screen data */
 554    (*psc->core->destroyScreen) (psc->driScreen);
 555    driDestroyConfigs(psc->driver_configs);
 556    close(psc->fd);
 557    free(psc);
 558 }
 559
 560 /** dri3_set_swap_interval
 561  *
 562  * Record the application swap interval specification,
 563  */
 564 static int
 565 dri3_set_swap_interval(__GLXDRIdrawable *pdraw, int interval)
 566 {
 567    assert(pdraw != NULL);
 568
 569    struct dri3_drawable *priv =  (struct dri3_drawable *) pdraw;
 570    GLint vblank_mode = DRI_CONF_VBLANK_DEF_INTERVAL_1;
 571    struct dri3_screen *psc = (struct dri3_screen *) priv->base.psc;
 572
 573    if (psc->config)
 574       psc->config->configQueryi(psc->driScreen,
 575                                 "vblank_mode", &vblank_mode);
 576
 577    switch (vblank_mode) {
 578    case DRI_CONF_VBLANK_NEVER:
 579       if (interval != 0)
 580          return GLX_BAD_VALUE;
 581       break;
 582    case DRI_CONF_VBLANK_ALWAYS_SYNC:
 583       if (interval <= 0)
 584          return GLX_BAD_VALUE;
 585       break;
 586    default:
 587       break;
 588    }
 589
 590    loader_dri3_set_swap_interval(&priv->loader_drawable, interval);
 591
 592    return 0;
 593 }
 594
 595 /** dri3_get_swap_interval
 596  *
 597  * Return the stored swap interval
 598  */
 599 static int
 600 dri3_get_swap_interval(__GLXDRIdrawable *pdraw)
 601 {
 602    assert(pdraw != NULL);
 603
 604    struct dri3_drawable *priv =  (struct dri3_drawable *) pdraw;
 605
 606   return priv->swap_interval;
 607 }
 608
 609 static void
 610 dri3_bind_tex_image(Display * dpy,
 611                     GLXDrawable drawable,
 612                     int buffer, const int *attrib_list)
 613 {
 614    struct glx_context *gc = __glXGetCurrentContext();
 615    struct dri3_context *pcp = (struct dri3_context *) gc;
 616    __GLXDRIdrawable *base = GetGLXDRIDrawable(dpy, drawable);
 617    struct dri3_drawable *pdraw = (struct dri3_drawable *) base;
 618    struct dri3_screen *psc;
 619
 620    if (pdraw != NULL) {
 621       psc = (struct dri3_screen *) base->psc;
 622
 623       (*psc->f->invalidate)(pdraw->loader_drawable.dri_drawable);
 624
 625       XSync(dpy, false);
 626
 627       (*psc->texBuffer->setTexBuffer2) (pcp->driContext,
 628                                         pdraw->base.textureTarget,
 629                                         pdraw->base.textureFormat,
 630                                         pdraw->loader_drawable.dri_drawable);
 631    }
 632 }
 633
 634 static void
 635 dri3_release_tex_image(Display * dpy, GLXDrawable drawable, int buffer)
 636 {
 637    struct glx_context *gc = __glXGetCurrentContext();
 638    struct dri3_context *pcp = (struct dri3_context *) gc;
 639    __GLXDRIdrawable *base = GetGLXDRIDrawable(dpy, drawable);
 640    struct dri3_drawable *pdraw = (struct dri3_drawable *) base;
 641    struct dri3_screen *psc;
 642
 643    if (pdraw != NULL) {
 644       psc = (struct dri3_screen *) base->psc;
 645
 646       if (psc->texBuffer->base.version >= 3 &&
 647           psc->texBuffer->releaseTexBuffer != NULL)
 648          (*psc->texBuffer->releaseTexBuffer) (pcp->driContext,
 649                                               pdraw->base.textureTarget,
 650                                               pdraw->loader_drawable.dri_drawable);
 651    }
 652 }
 653
 654 static const struct glx_context_vtable dri3_context_vtable = {
 655    .destroy             = dri3_destroy_context,
 656    .bind                = dri3_bind_context,
 657    .unbind              = dri3_unbind_context,
 658    .wait_gl             = dri3_wait_gl,
 659    .wait_x              = dri3_wait_x,
 660    .use_x_font          = DRI_glXUseXFont,
 661    .bind_tex_image      = dri3_bind_tex_image,
 662    .release_tex_image   = dri3_release_tex_image,
 663    .get_proc_address    = NULL,
 664    .interop_query_device_info = dri3_interop_query_device_info,
 665    .interop_export_object = dri3_interop_export_object
 666 };
 667
 668 /** dri3_bind_extensions
 669  *
 670  * Enable all of the extensions supported on DRI3
 671  */
 672 static void
 673 dri3_bind_extensions(struct dri3_screen *psc, struct glx_display * priv,
 674                      const char *driverName)
 675 {
 676    const __DRIextension **extensions;
 677    unsigned mask;
 678    int i;
 679
 680    extensions = psc->core->getExtensions(psc->driScreen);
 681
 682    __glXEnableDirectExtension(&psc->base, "GLX_SGI_video_sync");
 683    __glXEnableDirectExtension(&psc->base, "GLX_SGI_swap_control");
 684    __glXEnableDirectExtension(&psc->base, "GLX_MESA_swap_control");
 685    __glXEnableDirectExtension(&psc->base, "GLX_SGI_make_current_read");
 686    __glXEnableDirectExtension(&psc->base, "GLX_INTEL_swap_event");
 687
 688    mask = psc->image_driver->getAPIMask(psc->driScreen);
 689
 690    __glXEnableDirectExtension(&psc->base, "GLX_ARB_create_context");
 691    __glXEnableDirectExtension(&psc->base, "GLX_ARB_create_context_profile");
 692
 693    if ((mask & ((1 << __DRI_API_GLES) |
 694                 (1 << __DRI_API_GLES2) |
 695                 (1 << __DRI_API_GLES3))) != 0) {
 696       __glXEnableDirectExtension(&psc->base,
 697                                  "GLX_EXT_create_context_es_profile");
 698       __glXEnableDirectExtension(&psc->base,
 699                                  "GLX_EXT_create_context_es2_profile");
 700    }
 701
 702    for (i = 0; extensions[i]; i++) {
 703       /* when on a different gpu than the server, the server pixmaps
 704        * can have a tiling mode we can't read. Thus we can't create
 705        * a texture from them.
 706        */
 707       if (!psc->is_different_gpu &&
 708          (strcmp(extensions[i]->name, __DRI_TEX_BUFFER) == 0)) {
 709          psc->texBuffer = (__DRItexBufferExtension *) extensions[i];
 710          __glXEnableDirectExtension(&psc->base, "GLX_EXT_texture_from_pixmap");
 711       }
 712
 713       if ((strcmp(extensions[i]->name, __DRI2_FLUSH) == 0)) {
 714          psc->f = (__DRI2flushExtension *) extensions[i];
 715          /* internal driver extension, no GL extension exposed */
 716       }
 717
 718       if (strcmp(extensions[i]->name, __DRI_IMAGE) == 0)
 719          psc->image = (__DRIimageExtension *) extensions[i];
 720
 721       if ((strcmp(extensions[i]->name, __DRI2_CONFIG_QUERY) == 0))
 722          psc->config = (__DRI2configQueryExtension *) extensions[i];
 723
 724       if (strcmp(extensions[i]->name, __DRI2_ROBUSTNESS) == 0)
 725          __glXEnableDirectExtension(&psc->base,
 726                                     "GLX_ARB_create_context_robustness");
 727
 728       if (strcmp(extensions[i]->name, __DRI2_RENDERER_QUERY) == 0) {
 729          psc->rendererQuery = (__DRI2rendererQueryExtension *) extensions[i];
 730          __glXEnableDirectExtension(&psc->base, "GLX_MESA_query_renderer");
 731       }
 732
 733       if (strcmp(extensions[i]->name, __DRI2_INTEROP) == 0)
 734          psc->interop = (__DRI2interopExtension*)extensions[i];
 735    }
 736 }
 737
 738 static const struct glx_screen_vtable dri3_screen_vtable = {
 739    .create_context         = dri3_create_context,
 740    .create_context_attribs = dri3_create_context_attribs,
 741    .query_renderer_integer = dri3_query_renderer_integer,
 742    .query_renderer_string  = dri3_query_renderer_string,
 743 };
 744
 745 /** dri3_create_screen
 746  *
 747  * Initialize DRI3 on the specified screen.
 748  *
 749  * Opens the DRI device, locates the appropriate DRI driver
 750  * and loads that.
 751  *
 752  * Checks to see if the driver supports the necessary extensions
 753  *
 754  * Initializes the driver for the screen and sets up our structures
 755  */
 756
 757 static struct glx_screen *
 758 dri3_create_screen(int screen, struct glx_display * priv)
 759 {
 760    xcb_connection_t *c = XGetXCBConnection(priv->dpy);
 761    const __DRIconfig **driver_configs;
 762    const __DRIextension **extensions;
 763    const struct dri3_display *const pdp = (struct dri3_display *)
 764       priv->dri3Display;
 765    struct dri3_screen *psc;
 766    __GLXDRIscreen *psp;
 767    struct glx_config *configs = NULL, *visuals = NULL;
 768    char *driverName, *deviceName, *tmp;
 769    int i;
 770
 771    psc = calloc(1, sizeof *psc);
 772    if (psc == NULL)
 773       return NULL;
 774
 775    psc->fd = -1;
 776
 777    if (!glx_screen_init(&psc->base, screen, priv)) {
 778       free(psc);
 779       return NULL;
 780    }
 781
 782    psc->fd = loader_dri3_open(c, RootWindow(priv->dpy, screen), None);
 783    if (psc->fd < 0) {
 784       int conn_error = xcb_connection_has_error(c);
 785
 786       glx_screen_cleanup(&psc->base);
 787       free(psc);
 788       InfoMessageF("screen %d does not appear to be DRI3 capable\n", screen);
 789
 790       if (conn_error)
 791          ErrorMessageF("Connection closed during DRI3 initialization failure");
 792
 793       return NULL;
 794    }
 795
 796    psc->fd = loader_get_user_preferred_fd(psc->fd, &psc->is_different_gpu);
 797    deviceName = NULL;
 798
 799    driverName = loader_get_driver_for_fd(psc->fd);
 800    if (!driverName) {
 801       ErrorMessageF("No driver found\n");
 802       goto handle_error;
 803    }
 804
 805    psc->driver = driOpenDriver(driverName);
 806    if (psc->driver == NULL) {
 807       ErrorMessageF("driver pointer missing\n");
 808       goto handle_error;
 809    }
 810
 811    extensions = driGetDriverExtensions(psc->driver, driverName);
 812    if (extensions == NULL)
 813       goto handle_error;
 814
 815    for (i = 0; extensions[i]; i++) {
 816       if (strcmp(extensions[i]->name, __DRI_CORE) == 0)
 817          psc->core = (__DRIcoreExtension *) extensions[i];
 818       if (strcmp(extensions[i]->name, __DRI_IMAGE_DRIVER) == 0)
 819          psc->image_driver = (__DRIimageDriverExtension *) extensions[i];
 820    }
 821
 822
 823    if (psc->core == NULL) {
 824       ErrorMessageF("core dri driver extension not found\n");
 825       goto handle_error;
 826    }
 827
 828    if (psc->image_driver == NULL) {
 829       ErrorMessageF("image driver extension not found\n");
 830       goto handle_error;
 831    }
 832
 833    psc->driScreen =
 834       psc->image_driver->createNewScreen2(screen, psc->fd,
 835                                           pdp->loader_extensions,
 836                                           extensions,
 837                                           &driver_configs, psc);
 838
 839    if (psc->driScreen == NULL) {
 840       ErrorMessageF("failed to create dri screen\n");
 841       goto handle_error;
 842    }
 843
 844    dri3_bind_extensions(psc, priv, driverName);
 845
 846    if (!psc->image || psc->image->base.version < 7 || !psc->image->createImageFromFds) {
 847       ErrorMessageF("Version 7 or imageFromFds image extension not found\n");
 848       goto handle_error;
 849    }
 850
 851    if (!psc->f || psc->f->base.version < 4) {
 852       ErrorMessageF("Version 4 or later of flush extension not found\n");
 853       goto handle_error;
 854    }
 855
 856    if (psc->is_different_gpu && psc->image->base.version < 9) {
 857       ErrorMessageF("Different GPU, but image extension version 9 or later not found\n");
 858       goto handle_error;
 859    }
 860
 861    if (psc->is_different_gpu && !psc->image->blitImage) {
 862       ErrorMessageF("Different GPU, but blitImage not implemented for this driver\n");
 863       goto handle_error;
 864    }
 865
 866    if (!psc->is_different_gpu && (
 867        !psc->texBuffer || psc->texBuffer->base.version < 2 ||
 868        !psc->texBuffer->setTexBuffer2
 869        )) {
 870       ErrorMessageF("Version 2 or later of texBuffer extension not found\n");
 871       goto handle_error;
 872    }
 873
 874    psc->loader_dri3_ext.core = psc->core;
 875    psc->loader_dri3_ext.image_driver = psc->image_driver;
 876    psc->loader_dri3_ext.flush = psc->f;
 877    psc->loader_dri3_ext.tex_buffer = psc->texBuffer;
 878    psc->loader_dri3_ext.image = psc->image;
 879    psc->loader_dri3_ext.config = psc->config;
 880
 881    configs = driConvertConfigs(psc->core, psc->base.configs, driver_configs);
 882    visuals = driConvertConfigs(psc->core, psc->base.visuals, driver_configs);
 883
 884    if (!configs || !visuals) {
 885        ErrorMessageF("No matching fbConfigs or visuals found\n");
 886        goto handle_error;
 887    }
 888
 889    glx_config_destroy_list(psc->base.configs);
 890    psc->base.configs = configs;
 891    glx_config_destroy_list(psc->base.visuals);
 892    psc->base.visuals = visuals;
 893
 894    psc->driver_configs = driver_configs;
 895
 896    psc->base.vtable = &dri3_screen_vtable;
 897    psp = &psc->vtable;
 898    psc->base.driScreen = psp;
 899    psp->destroyScreen = dri3_destroy_screen;
 900    psp->createDrawable = dri3_create_drawable;
 901    psp->swapBuffers = dri3_swap_buffers;
 902
 903    psp->getDrawableMSC = dri3_drawable_get_msc;
 904    psp->waitForMSC = dri3_wait_for_msc;
 905    psp->waitForSBC = dri3_wait_for_sbc;
 906    psp->setSwapInterval = dri3_set_swap_interval;
 907    psp->getSwapInterval = dri3_get_swap_interval;
 908    __glXEnableDirectExtension(&psc->base, "GLX_OML_sync_control");
 909
 910    psp->copySubBuffer = dri3_copy_sub_buffer;
 911    __glXEnableDirectExtension(&psc->base, "GLX_MESA_copy_sub_buffer");
 912
 913    psp->getBufferAge = dri3_get_buffer_age;
 914    __glXEnableDirectExtension(&psc->base, "GLX_EXT_buffer_age");
 915
 916    free(driverName);
 917    free(deviceName);
 918
 919    tmp = getenv("LIBGL_SHOW_FPS");
 920    psc->show_fps_interval = tmp ? atoi(tmp) : 0;
 921    if (psc->show_fps_interval < 0)
 922       psc->show_fps_interval = 0;
 923
 924    InfoMessageF("Using DRI3 for screen %d\n", screen);
 925
 926    return &psc->base;
 927
 928 handle_error:
 929    CriticalErrorMessageF("failed to load driver: %s\n", driverName);
 930
 931    if (configs)
 932        glx_config_destroy_list(configs);
 933    if (visuals)
 934        glx_config_destroy_list(visuals);
 935    if (psc->driScreen)
 936        psc->core->destroyScreen(psc->driScreen);
 937    psc->driScreen = NULL;
 938    if (psc->fd >= 0)
 939       close(psc->fd);
 940    if (psc->driver)
 941       dlclose(psc->driver);
 942
 943    free(driverName);
 944    free(deviceName);
 945    glx_screen_cleanup(&psc->base);
 946    free(psc);
 947
 948    return NULL;
 949 }
 950
 951 /** dri_destroy_display
 952  *
 953  * Called from __glXFreeDisplayPrivate.
 954  */
 955 static void
 956 dri3_destroy_display(__GLXDRIdisplay * dpy)
 957 {
 958    free(dpy);
 959 }
 960
 961 /** dri3_create_display
 962  *
 963  * Allocate, initialize and return a __DRIdisplayPrivate object.
 964  * This is called from __glXInitialize() when we are given a new
 965  * display pointer. This is public to that function, but hidden from
 966  * outside of libGL.
 967  */
 968 _X_HIDDEN __GLXDRIdisplay *
 969 dri3_create_display(Display * dpy)
 970 {
 971    struct dri3_display                  *pdp;
 972    xcb_connection_t                     *c = XGetXCBConnection(dpy);
 973    xcb_dri3_query_version_cookie_t      dri3_cookie;
 974    xcb_dri3_query_version_reply_t       *dri3_reply;
 975    xcb_present_query_version_cookie_t   present_cookie;
 976    xcb_present_query_version_reply_t    *present_reply;
 977    xcb_generic_error_t                  *error;
 978    const xcb_query_extension_reply_t    *extension;
 979
 980    xcb_prefetch_extension_data(c, &xcb_dri3_id);
 981    xcb_prefetch_extension_data(c, &xcb_present_id);
 982
 983    extension = xcb_get_extension_data(c, &xcb_dri3_id);
 984    if (!(extension && extension->present))
 985       return NULL;
 986
 987    extension = xcb_get_extension_data(c, &xcb_present_id);
 988    if (!(extension && extension->present))
 989       return NULL;
 990
 991    dri3_cookie = xcb_dri3_query_version(c,
 992                                         XCB_DRI3_MAJOR_VERSION,
 993                                         XCB_DRI3_MINOR_VERSION);
 994
 995
 996    present_cookie = xcb_present_query_version(c,
 997                                    XCB_PRESENT_MAJOR_VERSION,
 998                                    XCB_PRESENT_MINOR_VERSION);
 999
1000    pdp = malloc(sizeof *pdp);
1001    if (pdp == NULL)
1002       return NULL;
1003
1004    dri3_reply = xcb_dri3_query_version_reply(c, dri3_cookie, &error);
1005    if (!dri3_reply) {
1006       free(error);
1007       goto no_extension;
1008    }
1009
1010    pdp->dri3Major = dri3_reply->major_version;
1011    pdp->dri3Minor = dri3_reply->minor_version;
1012    free(dri3_reply);
1013
1014    present_reply = xcb_present_query_version_reply(c, present_cookie, &error);
1015    if (!present_reply) {
1016       free(error);
1017       goto no_extension;
1018    }
1019    pdp->presentMajor = present_reply->major_version;
1020    pdp->presentMinor = present_reply->minor_version;
1021    free(present_reply);
1022
1023    pdp->base.destroyDisplay = dri3_destroy_display;
1024    pdp->base.createScreen = dri3_create_screen;
1025
1026    loader_set_logger(dri_message);
1027
1028    pdp->loader_extensions = loader_extensions;
1029
1030    return &pdp->base;
1031 no_extension:
1032    free(pdp);
1033    return NULL;
1034 }
1035
1036 #endif /* GLX_DIRECT_RENDERING */