src/glx/dri2_glx.c

   1 /*
   2  * Copyright © 2008 Red Hat, Inc.
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Soft-
   6  * ware"), to deal in the Software without restriction, including without
   7  * limitation the rights to use, copy, modify, merge, publish, distribute,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, provided that the above copyright
  10  * notice(s) and this permission notice appear in all copies of the Soft-
  11  * ware and that both the above copyright notice(s) and this permission
  12  * notice appear in supporting documentation.
  13  *
  14  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  15  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABIL-
  16  * ITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY
  17  * RIGHTS. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR HOLDERS INCLUDED IN
  18  * THIS NOTICE BE LIABLE FOR ANY CLAIM, OR ANY SPECIAL INDIRECT OR CONSE-
  19  * QUENTIAL DAMAGES, OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
  20  * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
  21  * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFOR-
  22  * MANCE OF THIS SOFTWARE.
  23  *
  24  * Except as contained in this notice, the name of a copyright holder shall
  25  * not be used in advertising or otherwise to promote the sale, use or
  26  * other dealings in this Software without prior written authorization of
  27  * the copyright holder.
  28  *
  29  * Authors:
  30  *   Kristian Høgsberg (krh@redhat.com)
  31  */
  32
  33 #if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
  34
  35 #include <X11/Xlib.h>
  36 #include <X11/extensions/Xfixes.h>
  37 #include "glapi.h"
  38 #include "glxclient.h"
  39 #include <X11/extensions/dri2proto.h>
  40 #include "xf86dri.h"
  41 #include <dlfcn.h>
  42 #include <fcntl.h>
  43 #include <unistd.h>
  44 #include <sys/types.h>
  45 #include <sys/mman.h>
  46 #include <sys/time.h>
  47 #include "xf86drm.h"
  48 #include "dri2.h"
  49 #include "dri_common.h"
  50
  51 /* From xmlpool/options.h, user exposed so should be stable */
  52 #define DRI_CONF_VBLANK_NEVER 0
  53 #define DRI_CONF_VBLANK_DEF_INTERVAL_0 1
  54 #define DRI_CONF_VBLANK_DEF_INTERVAL_1 2
  55 #define DRI_CONF_VBLANK_ALWAYS_SYNC 3
  56
  57 #undef DRI2_MINOR
  58 #define DRI2_MINOR 1
  59
  60 struct dri2_display
  61 {
  62    __GLXDRIdisplay base;
  63
  64    /*
  65     ** XFree86-DRI version information
  66     */
  67    int driMajor;
  68    int driMinor;
  69    int driPatch;
  70    int swapAvailable;
  71    int invalidateAvailable;
  72
  73    __glxHashTable *dri2Hash;
  74
  75    const __DRIextension *loader_extensions[4];
  76 };
  77
  78 struct dri2_screen {
  79    struct glx_screen base;
  80
  81    __DRIscreen *driScreen;
  82    __GLXDRIscreen vtable;
  83    const __DRIdri2Extension *dri2;
  84    const __DRIcoreExtension *core;
  85
  86    const __DRI2flushExtension *f;
  87    const __DRI2configQueryExtension *config;
  88    const __DRItexBufferExtension *texBuffer;
  89    const __DRI2throttleExtension *throttle;
  90    const __DRIconfig **driver_configs;
  91
  92    void *driver;
  93    int fd;
  94
  95    Bool show_fps;
  96 };
  97
  98 struct dri2_context
  99 {
 100    struct glx_context base;
 101    __DRIcontext *driContext;
 102 };
 103
 104 struct dri2_drawable
 105 {
 106    __GLXDRIdrawable base;
 107    __DRIdrawable *driDrawable;
 108    __DRIbuffer buffers[5];
 109    int bufferCount;
 110    int width, height;
 111    int have_back;
 112    int have_fake_front;
 113    int swap_interval;
 114
 115    uint64_t previous_time;
 116    unsigned frames;
 117 };
 118
 119 static const struct glx_context_vtable dri2_context_vtable;
 120
 121 static void
 122 dri2_destroy_context(struct glx_context *context)
 123 {
 124    struct dri2_context *pcp = (struct dri2_context *) context;
 125    struct dri2_screen *psc = (struct dri2_screen *) context->psc;
 126
 127    driReleaseDrawables(&pcp->base);
 128
 129    free((char *) context->extensions);
 130
 131    (*psc->core->destroyContext) (pcp->driContext);
 132
 133    free(pcp);
 134 }
 135
 136 static Bool
 137 dri2_bind_context(struct glx_context *context, struct glx_context *old,
 138                   GLXDrawable draw, GLXDrawable read)
 139 {
 140    struct dri2_context *pcp = (struct dri2_context *) context;
 141    struct dri2_screen *psc = (struct dri2_screen *) pcp->base.psc;
 142    struct dri2_drawable *pdraw, *pread;
 143    struct dri2_display *pdp;
 144
 145    pdraw = (struct dri2_drawable *) driFetchDrawable(context, draw);
 146    pread = (struct dri2_drawable *) driFetchDrawable(context, read);
 147
 148    driReleaseDrawables(&pcp->base);
 149
 150    if (pdraw == NULL || pread == NULL)
 151       return GLXBadDrawable;
 152
 153    if (!(*psc->core->bindContext) (pcp->driContext,
 154                                    pdraw->driDrawable, pread->driDrawable))
 155       return GLXBadContext;
 156
 157    /* If the server doesn't send invalidate events, we may miss a
 158     * resize before the rendering starts.  Invalidate the buffers now
 159     * so the driver will recheck before rendering starts. */
 160    pdp = (struct dri2_display *) psc->base.display;
 161    if (!pdp->invalidateAvailable) {
 162       dri2InvalidateBuffers(psc->base.dpy, pdraw->base.xDrawable);
 163       if (pread != pdraw)
 164          dri2InvalidateBuffers(psc->base.dpy, pread->base.xDrawable);
 165    }
 166
 167    return Success;
 168 }
 169
 170 static void
 171 dri2_unbind_context(struct glx_context *context, struct glx_context *new)
 172 {
 173    struct dri2_context *pcp = (struct dri2_context *) context;
 174    struct dri2_screen *psc = (struct dri2_screen *) pcp->base.psc;
 175
 176    (*psc->core->unbindContext) (pcp->driContext);
 177 }
 178
 179 static struct glx_context *
 180 dri2_create_context(struct glx_screen *base,
 181                     struct glx_config *config_base,
 182                     struct glx_context *shareList, int renderType)
 183 {
 184    struct dri2_context *pcp, *pcp_shared;
 185    struct dri2_screen *psc = (struct dri2_screen *) base;
 186    __GLXDRIconfigPrivate *config = (__GLXDRIconfigPrivate *) config_base;
 187    __DRIcontext *shared = NULL;
 188
 189    if (shareList) {
 190       /* If the shareList context is not a DRI2 context, we cannot possibly
 191        * create a DRI2 context that shares it.
 192        */
 193       if (shareList->vtable->destroy != dri2_destroy_context) {
 194          return NULL;
 195       }
 196
 197       pcp_shared = (struct dri2_context *) shareList;
 198       shared = pcp_shared->driContext;
 199    }
 200
 201    pcp = calloc(1, sizeof *pcp);
 202    if (pcp == NULL)
 203       return NULL;
 204
 205    if (!glx_context_init(&pcp->base, &psc->base, &config->base)) {
 206       free(pcp);
 207       return NULL;
 208    }
 209
 210    pcp->driContext =
 211       (*psc->dri2->createNewContext) (psc->driScreen,
 212                                       config->driConfig, shared, pcp);
 213
 214    if (pcp->driContext == NULL) {
 215       free(pcp);
 216       return NULL;
 217    }
 218
 219    pcp->base.vtable = &dri2_context_vtable;
 220
 221    return &pcp->base;
 222 }
 223
 224 static struct glx_context *
 225 dri2_create_context_attribs(struct glx_screen *base,
 226                             struct glx_config *config_base,
 227                             struct glx_context *shareList,
 228                             unsigned num_attribs,
 229                             const uint32_t *attribs,
 230                             unsigned *error)
 231 {
 232    struct dri2_context *pcp = NULL;
 233    struct dri2_context *pcp_shared = NULL;
 234    struct dri2_screen *psc = (struct dri2_screen *) base;
 235    __GLXDRIconfigPrivate *config = (__GLXDRIconfigPrivate *) config_base;
 236    __DRIcontext *shared = NULL;
 237
 238    uint32_t minor_ver = 1;
 239    uint32_t major_ver = 2;
 240    uint32_t flags = 0;
 241    unsigned api;
 242    int reset = __DRI_CTX_RESET_NO_NOTIFICATION;
 243    uint32_t ctx_attribs[2 * 5];
 244    unsigned num_ctx_attribs = 0;
 245
 246    if (psc->dri2->base.version < 3) {
 247       *error = __DRI_CTX_ERROR_NO_MEMORY;
 248       goto error_exit;
 249    }
 250
 251    /* Remap the GLX tokens to DRI2 tokens.
 252     */
 253    if (!dri2_convert_glx_attribs(num_attribs, attribs,
 254                                  &major_ver, &minor_ver, &flags, &api, &reset,
 255                                  error))
 256       goto error_exit;
 257
 258    if (shareList) {
 259       pcp_shared = (struct dri2_context *) shareList;
 260       shared = pcp_shared->driContext;
 261    }
 262
 263    pcp = calloc(1, sizeof *pcp);
 264    if (pcp == NULL) {
 265       *error = __DRI_CTX_ERROR_NO_MEMORY;
 266       goto error_exit;
 267    }
 268
 269    if (!glx_context_init(&pcp->base, &psc->base, &config->base))
 270       goto error_exit;
 271
 272    ctx_attribs[num_ctx_attribs++] = __DRI_CTX_ATTRIB_MAJOR_VERSION;
 273    ctx_attribs[num_ctx_attribs++] = major_ver;
 274    ctx_attribs[num_ctx_attribs++] = __DRI_CTX_ATTRIB_MINOR_VERSION;
 275    ctx_attribs[num_ctx_attribs++] = minor_ver;
 276
 277    /* Only send a value when the non-default value is requested.  By doing
 278     * this we don't have to check the driver's DRI2 version before sending the
 279     * default value.
 280     */
 281    if (reset != __DRI_CTX_RESET_NO_NOTIFICATION) {
 282       ctx_attribs[num_ctx_attribs++] = __DRI_CTX_ATTRIB_RESET_STRATEGY;
 283       ctx_attribs[num_ctx_attribs++] = reset;
 284    }
 285
 286    if (flags != 0) {
 287       ctx_attribs[num_ctx_attribs++] = __DRI_CTX_ATTRIB_FLAGS;
 288
 289       /* The current __DRI_CTX_FLAG_* values are identical to the
 290        * GLX_CONTEXT_*_BIT values.
 291        */
 292       ctx_attribs[num_ctx_attribs++] = flags;
 293    }
 294
 295    pcp->driContext =
 296       (*psc->dri2->createContextAttribs) (psc->driScreen,
 297                                           api,
 298                                           config->driConfig,
 299                                           shared,
 300                                           num_ctx_attribs / 2,
 301                                           ctx_attribs,
 302                                           error,
 303                                           pcp);
 304
 305    if (pcp->driContext == NULL)
 306       goto error_exit;
 307
 308    pcp->base.vtable = &dri2_context_vtable;
 309
 310    return &pcp->base;
 311
 312 error_exit:
 313    free(pcp);
 314
 315    return NULL;
 316 }
 317
 318 static void
 319 dri2DestroyDrawable(__GLXDRIdrawable *base)
 320 {
 321    struct dri2_screen *psc = (struct dri2_screen *) base->psc;
 322    struct dri2_drawable *pdraw = (struct dri2_drawable *) base;
 323    struct glx_display *dpyPriv = psc->base.display;
 324    struct dri2_display *pdp = (struct dri2_display *)dpyPriv->dri2Display;
 325
 326    __glxHashDelete(pdp->dri2Hash, pdraw->base.xDrawable);
 327    (*psc->core->destroyDrawable) (pdraw->driDrawable);
 328
 329    /* If it's a GLX 1.3 drawables, we can destroy the DRI2 drawable
 330     * now, as the application explicitly asked to destroy the GLX
 331     * drawable.  Otherwise, for legacy drawables, we let the DRI2
 332     * drawable linger on the server, since there's no good way of
 333     * knowing when the application is done with it.  The server will
 334     * destroy the DRI2 drawable when it destroys the X drawable or the
 335     * client exits anyway. */
 336    if (pdraw->base.xDrawable != pdraw->base.drawable)
 337       DRI2DestroyDrawable(psc->base.dpy, pdraw->base.xDrawable);
 338
 339    free(pdraw);
 340 }
 341
 342 static __GLXDRIdrawable *
 343 dri2CreateDrawable(struct glx_screen *base, XID xDrawable,
 344                    GLXDrawable drawable, struct glx_config *config_base)
 345 {
 346    struct dri2_drawable *pdraw;
 347    struct dri2_screen *psc = (struct dri2_screen *) base;
 348    __GLXDRIconfigPrivate *config = (__GLXDRIconfigPrivate *) config_base;
 349    struct glx_display *dpyPriv;
 350    struct dri2_display *pdp;
 351    GLint vblank_mode = DRI_CONF_VBLANK_DEF_INTERVAL_1;
 352
 353    pdraw = calloc(1, sizeof(*pdraw));
 354    if (!pdraw)
 355       return NULL;
 356
 357    pdraw->base.destroyDrawable = dri2DestroyDrawable;
 358    pdraw->base.xDrawable = xDrawable;
 359    pdraw->base.drawable = drawable;
 360    pdraw->base.psc = &psc->base;
 361    pdraw->bufferCount = 0;
 362    pdraw->swap_interval = 1; /* default may be overridden below */
 363    pdraw->have_back = 0;
 364
 365    if (psc->config)
 366       psc->config->configQueryi(psc->driScreen,
 367                                 "vblank_mode", &vblank_mode);
 368
 369    switch (vblank_mode) {
 370    case DRI_CONF_VBLANK_NEVER:
 371    case DRI_CONF_VBLANK_DEF_INTERVAL_0:
 372       pdraw->swap_interval = 0;
 373       break;
 374    case DRI_CONF_VBLANK_DEF_INTERVAL_1:
 375    case DRI_CONF_VBLANK_ALWAYS_SYNC:
 376    default:
 377       pdraw->swap_interval = 1;
 378       break;
 379    }
 380
 381    DRI2CreateDrawable(psc->base.dpy, xDrawable);
 382
 383    dpyPriv = __glXInitialize(psc->base.dpy);
 384    pdp = (struct dri2_display *)dpyPriv->dri2Display;;
 385    /* Create a new drawable */
 386    pdraw->driDrawable =
 387       (*psc->dri2->createNewDrawable) (psc->driScreen,
 388                                        config->driConfig, pdraw);
 389
 390    if (!pdraw->driDrawable) {
 391       DRI2DestroyDrawable(psc->base.dpy, xDrawable);
 392       free(pdraw);
 393       return NULL;
 394    }
 395
 396    if (__glxHashInsert(pdp->dri2Hash, xDrawable, pdraw)) {
 397       (*psc->core->destroyDrawable) (pdraw->driDrawable);
 398       DRI2DestroyDrawable(psc->base.dpy, xDrawable);
 399       free(pdraw);
 400       return None;
 401    }
 402
 403
 404 #ifdef X_DRI2SwapInterval
 405    /*
 406     * Make sure server has the same swap interval we do for the new
 407     * drawable.
 408     */
 409    if (pdp->swapAvailable)
 410       DRI2SwapInterval(psc->base.dpy, xDrawable, pdraw->swap_interval);
 411 #endif
 412
 413    return &pdraw->base;
 414 }
 415
 416 #ifdef X_DRI2GetMSC
 417
 418 static int
 419 dri2DrawableGetMSC(struct glx_screen *psc, __GLXDRIdrawable *pdraw,
 420                    int64_t *ust, int64_t *msc, int64_t *sbc)
 421 {
 422    CARD64 dri2_ust, dri2_msc, dri2_sbc;
 423    int ret;
 424
 425    ret = DRI2GetMSC(psc->dpy, pdraw->xDrawable,
 426                     &dri2_ust, &dri2_msc, &dri2_sbc);
 427    *ust = dri2_ust;
 428    *msc = dri2_msc;
 429    *sbc = dri2_sbc;
 430
 431    return ret;
 432 }
 433
 434 #endif
 435
 436
 437 #ifdef X_DRI2WaitMSC
 438
 439 static int
 440 dri2WaitForMSC(__GLXDRIdrawable *pdraw, int64_t target_msc, int64_t divisor,
 441                int64_t remainder, int64_t *ust, int64_t *msc, int64_t *sbc)
 442 {
 443    CARD64 dri2_ust, dri2_msc, dri2_sbc;
 444    int ret;
 445
 446    ret = DRI2WaitMSC(pdraw->psc->dpy, pdraw->xDrawable, target_msc, divisor,
 447                      remainder, &dri2_ust, &dri2_msc, &dri2_sbc);
 448    *ust = dri2_ust;
 449    *msc = dri2_msc;
 450    *sbc = dri2_sbc;
 451
 452    return ret;
 453 }
 454
 455 static int
 456 dri2WaitForSBC(__GLXDRIdrawable *pdraw, int64_t target_sbc, int64_t *ust,
 457                int64_t *msc, int64_t *sbc)
 458 {
 459    CARD64 dri2_ust, dri2_msc, dri2_sbc;
 460    int ret;
 461
 462    ret = DRI2WaitSBC(pdraw->psc->dpy, pdraw->xDrawable,
 463                      target_sbc, &dri2_ust, &dri2_msc, &dri2_sbc);
 464    *ust = dri2_ust;
 465    *msc = dri2_msc;
 466    *sbc = dri2_sbc;
 467
 468    return ret;
 469 }
 470
 471 #endif /* X_DRI2WaitMSC */
 472
 473 /**
 474  * dri2Throttle - Request driver throttling
 475  *
 476  * This function uses the DRI2 throttle extension to give the
 477  * driver the opportunity to throttle on flush front, copysubbuffer
 478  * and swapbuffers.
 479  */
 480 static void
 481 dri2Throttle(struct dri2_screen *psc,
 482              struct dri2_drawable *draw,
 483              enum __DRI2throttleReason reason)
 484 {
 485    if (psc->throttle) {
 486       struct glx_context *gc = __glXGetCurrentContext();
 487       struct dri2_context *dri2Ctx = (struct dri2_context *)gc;
 488       __DRIcontext *ctx =
 489          (dri2Ctx) ? dri2Ctx->driContext : NULL;
 490
 491       psc->throttle->throttle(ctx, draw->driDrawable, reason);
 492    }
 493 }
 494
 495 static void
 496 __dri2CopySubBuffer(__GLXDRIdrawable *pdraw, int x, int y,
 497                     int width, int height,
 498                     enum __DRI2throttleReason reason)
 499 {
 500    struct dri2_drawable *priv = (struct dri2_drawable *) pdraw;
 501    struct dri2_screen *psc = (struct dri2_screen *) pdraw->psc;
 502    XRectangle xrect;
 503    XserverRegion region;
 504
 505    /* Check we have the right attachments */
 506    if (!priv->have_back)
 507       return;
 508
 509    xrect.x = x;
 510    xrect.y = priv->height - y - height;
 511    xrect.width = width;
 512    xrect.height = height;
 513
 514    if (psc->f)
 515       (*psc->f->flush) (priv->driDrawable);
 516
 517    dri2Throttle(psc, priv, reason);
 518
 519    region = XFixesCreateRegion(psc->base.dpy, &xrect, 1);
 520    DRI2CopyRegion(psc->base.dpy, pdraw->xDrawable, region,
 521                   DRI2BufferFrontLeft, DRI2BufferBackLeft);
 522
 523    /* Refresh the fake front (if present) after we just damaged the real
 524     * front.
 525     */
 526    if (priv->have_fake_front)
 527       DRI2CopyRegion(psc->base.dpy, pdraw->xDrawable, region,
 528                      DRI2BufferFakeFrontLeft, DRI2BufferFrontLeft);
 529
 530    XFixesDestroyRegion(psc->base.dpy, region);
 531 }
 532
 533 static void
 534 dri2CopySubBuffer(__GLXDRIdrawable *pdraw, int x, int y,
 535                   int width, int height)
 536 {
 537    __dri2CopySubBuffer(pdraw, x, y, width, height,
 538                        __DRI2_THROTTLE_COPYSUBBUFFER);
 539 }
 540
 541
 542 static void
 543 dri2_copy_drawable(struct dri2_drawable *priv, int dest, int src)
 544 {
 545    XRectangle xrect;
 546    XserverRegion region;
 547    struct dri2_screen *psc = (struct dri2_screen *) priv->base.psc;
 548
 549    xrect.x = 0;
 550    xrect.y = 0;
 551    xrect.width = priv->width;
 552    xrect.height = priv->height;
 553
 554    if (psc->f)
 555       (*psc->f->flush) (priv->driDrawable);
 556
 557    region = XFixesCreateRegion(psc->base.dpy, &xrect, 1);
 558    DRI2CopyRegion(psc->base.dpy, priv->base.xDrawable, region, dest, src);
 559    XFixesDestroyRegion(psc->base.dpy, region);
 560
 561 }
 562
 563 static void
 564 dri2_wait_x(struct glx_context *gc)
 565 {
 566    struct dri2_drawable *priv = (struct dri2_drawable *)
 567       GetGLXDRIDrawable(gc->currentDpy, gc->currentDrawable);
 568
 569    if (priv == NULL || !priv->have_fake_front)
 570       return;
 571
 572    dri2_copy_drawable(priv, DRI2BufferFakeFrontLeft, DRI2BufferFrontLeft);
 573 }
 574
 575 static void
 576 dri2_wait_gl(struct glx_context *gc)
 577 {
 578    struct dri2_drawable *priv = (struct dri2_drawable *)
 579       GetGLXDRIDrawable(gc->currentDpy, gc->currentDrawable);
 580
 581    if (priv == NULL || !priv->have_fake_front)
 582       return;
 583
 584    dri2_copy_drawable(priv, DRI2BufferFrontLeft, DRI2BufferFakeFrontLeft);
 585 }
 586
 587 static void
 588 dri2FlushFrontBuffer(__DRIdrawable *driDrawable, void *loaderPrivate)
 589 {
 590    struct glx_display *priv;
 591    struct dri2_display *pdp;
 592    struct glx_context *gc;
 593    struct dri2_drawable *pdraw = loaderPrivate;
 594    struct dri2_screen *psc;
 595
 596    if (!pdraw)
 597       return;
 598
 599    if (!pdraw->base.psc)
 600       return;
 601
 602    psc = (struct dri2_screen *) pdraw->base.psc;
 603
 604    priv = __glXInitialize(psc->base.dpy);
 605    pdp = (struct dri2_display *) priv->dri2Display;
 606    gc = __glXGetCurrentContext();
 607
 608    dri2Throttle(psc, pdraw, __DRI2_THROTTLE_FLUSHFRONT);
 609
 610    /* Old servers don't send invalidate events */
 611    if (!pdp->invalidateAvailable)
 612        dri2InvalidateBuffers(priv->dpy, pdraw->base.xDrawable);
 613
 614    dri2_wait_gl(gc);
 615 }
 616
 617
 618 static void
 619 dri2DestroyScreen(struct glx_screen *base)
 620 {
 621    struct dri2_screen *psc = (struct dri2_screen *) base;
 622
 623    /* Free the direct rendering per screen data */
 624    (*psc->core->destroyScreen) (psc->driScreen);
 625    driDestroyConfigs(psc->driver_configs);
 626    close(psc->fd);
 627    free(psc);
 628 }
 629
 630 /**
 631  * Process list of buffer received from the server
 632  *
 633  * Processes the list of buffers received in a reply from the server to either
 634  * \c DRI2GetBuffers or \c DRI2GetBuffersWithFormat.
 635  */
 636 static void
 637 process_buffers(struct dri2_drawable * pdraw, DRI2Buffer * buffers,
 638                 unsigned count)
 639 {
 640    int i;
 641
 642    pdraw->bufferCount = count;
 643    pdraw->have_fake_front = 0;
 644    pdraw->have_back = 0;
 645
 646    /* This assumes the DRI2 buffer attachment tokens matches the
 647     * __DRIbuffer tokens. */
 648    for (i = 0; i < count; i++) {
 649       pdraw->buffers[i].attachment = buffers[i].attachment;
 650       pdraw->buffers[i].name = buffers[i].name;
 651       pdraw->buffers[i].pitch = buffers[i].pitch;
 652       pdraw->buffers[i].cpp = buffers[i].cpp;
 653       pdraw->buffers[i].flags = buffers[i].flags;
 654       if (pdraw->buffers[i].attachment == __DRI_BUFFER_FAKE_FRONT_LEFT)
 655          pdraw->have_fake_front = 1;
 656       if (pdraw->buffers[i].attachment == __DRI_BUFFER_BACK_LEFT)
 657          pdraw->have_back = 1;
 658    }
 659
 660 }
 661
 662 unsigned dri2GetSwapEventType(Display* dpy, XID drawable)
 663 {
 664       struct glx_display *glx_dpy = __glXInitialize(dpy);
 665       __GLXDRIdrawable *pdraw;
 666       pdraw = dri2GetGlxDrawableFromXDrawableId(dpy, drawable);
 667       if (!pdraw || !(pdraw->eventMask & GLX_BUFFER_SWAP_COMPLETE_INTEL_MASK))
 668          return 0;
 669       return glx_dpy->codes->first_event + GLX_BufferSwapComplete;
 670 }
 671
 672 static void show_fps(struct dri2_drawable *draw)
 673 {
 674    struct timeval tv;
 675    uint64_t current_time;
 676
 677    gettimeofday(&tv, 0);
 678    current_time = (uint64_t)tv.tv_sec*1000000 + (uint64_t)tv.tv_usec;
 679
 680    draw->frames++;
 681
 682    if (draw->previous_time + 1000000 <= current_time) {
 683       if (draw->previous_time) {
 684          fprintf(stderr, "libGL: FPS = %.1f\n",
 685                  ((uint64_t)draw->frames * 1000000) /
 686                  (double)(current_time - draw->previous_time));
 687       }
 688       draw->frames = 0;
 689       draw->previous_time = current_time;
 690    }
 691 }
 692
 693 static int64_t
 694 dri2SwapBuffers(__GLXDRIdrawable *pdraw, int64_t target_msc, int64_t divisor,
 695                 int64_t remainder)
 696 {
 697     struct dri2_drawable *priv = (struct dri2_drawable *) pdraw;
 698     struct glx_display *dpyPriv = __glXInitialize(priv->base.psc->dpy);
 699     struct dri2_screen *psc = (struct dri2_screen *) priv->base.psc;
 700     struct dri2_display *pdp =
 701         (struct dri2_display *)dpyPriv->dri2Display;
 702     CARD64 ret = 0;
 703
 704     /* Check we have the right attachments */
 705     if (!priv->have_back)
 706         return ret;
 707
 708     /* Old servers can't handle swapbuffers */
 709     if (!pdp->swapAvailable) {
 710        __dri2CopySubBuffer(pdraw, 0, 0, priv->width, priv->height,
 711                            __DRI2_THROTTLE_SWAPBUFFER);
 712     } else {
 713 #ifdef X_DRI2SwapBuffers
 714     if (psc->f) {
 715        struct glx_context *gc = __glXGetCurrentContext();
 716
 717        if (gc) {
 718           (*psc->f->flush)(priv->driDrawable);
 719        }
 720     }
 721
 722        dri2Throttle(psc, priv, __DRI2_THROTTLE_SWAPBUFFER);
 723
 724        DRI2SwapBuffers(psc->base.dpy, pdraw->xDrawable,
 725                        target_msc, divisor, remainder, &ret);
 726 #endif
 727     }
 728
 729     if (psc->show_fps) {
 730        show_fps(priv);
 731     }
 732
 733     /* Old servers don't send invalidate events */
 734     if (!pdp->invalidateAvailable)
 735        dri2InvalidateBuffers(dpyPriv->dpy, pdraw->xDrawable);
 736
 737     return ret;
 738 }
 739
 740 static __DRIbuffer *
 741 dri2GetBuffers(__DRIdrawable * driDrawable,
 742                int *width, int *height,
 743                unsigned int *attachments, int count,
 744                int *out_count, void *loaderPrivate)
 745 {
 746    struct dri2_drawable *pdraw = loaderPrivate;
 747    DRI2Buffer *buffers;
 748
 749    buffers = DRI2GetBuffers(pdraw->base.psc->dpy, pdraw->base.xDrawable,
 750                             width, height, attachments, count, out_count);
 751    if (buffers == NULL)
 752       return NULL;
 753
 754    pdraw->width = *width;
 755    pdraw->height = *height;
 756    process_buffers(pdraw, buffers, *out_count);
 757
 758    free(buffers);
 759
 760    return pdraw->buffers;
 761 }
 762
 763 static __DRIbuffer *
 764 dri2GetBuffersWithFormat(__DRIdrawable * driDrawable,
 765                          int *width, int *height,
 766                          unsigned int *attachments, int count,
 767                          int *out_count, void *loaderPrivate)
 768 {
 769    struct dri2_drawable *pdraw = loaderPrivate;
 770    DRI2Buffer *buffers;
 771
 772    buffers = DRI2GetBuffersWithFormat(pdraw->base.psc->dpy,
 773                                       pdraw->base.xDrawable,
 774                                       width, height, attachments,
 775                                       count, out_count);
 776    if (buffers == NULL)
 777       return NULL;
 778
 779    pdraw->width = *width;
 780    pdraw->height = *height;
 781    process_buffers(pdraw, buffers, *out_count);
 782
 783    free(buffers);
 784
 785    return pdraw->buffers;
 786 }
 787
 788 #ifdef X_DRI2SwapInterval
 789
 790 static int
 791 dri2SetSwapInterval(__GLXDRIdrawable *pdraw, int interval)
 792 {
 793    struct dri2_drawable *priv =  (struct dri2_drawable *) pdraw;
 794    GLint vblank_mode = DRI_CONF_VBLANK_DEF_INTERVAL_1;
 795    struct dri2_screen *psc = (struct dri2_screen *) priv->base.psc;
 796
 797    if (psc->config)
 798       psc->config->configQueryi(psc->driScreen,
 799                                 "vblank_mode", &vblank_mode);
 800
 801    switch (vblank_mode) {
 802    case DRI_CONF_VBLANK_NEVER:
 803       return GLX_BAD_VALUE;
 804    case DRI_CONF_VBLANK_ALWAYS_SYNC:
 805       if (interval <= 0)
 806          return GLX_BAD_VALUE;
 807       break;
 808    default:
 809       break;
 810    }
 811
 812    DRI2SwapInterval(priv->base.psc->dpy, priv->base.xDrawable, interval);
 813    priv->swap_interval = interval;
 814
 815    return 0;
 816 }
 817
 818 static int
 819 dri2GetSwapInterval(__GLXDRIdrawable *pdraw)
 820 {
 821    struct dri2_drawable *priv =  (struct dri2_drawable *) pdraw;
 822
 823   return priv->swap_interval;
 824 }
 825
 826 #endif /* X_DRI2SwapInterval */
 827
 828 static const __DRIdri2LoaderExtension dri2LoaderExtension = {
 829    {__DRI_DRI2_LOADER, __DRI_DRI2_LOADER_VERSION},
 830    dri2GetBuffers,
 831    dri2FlushFrontBuffer,
 832    dri2GetBuffersWithFormat,
 833 };
 834
 835 static const __DRIdri2LoaderExtension dri2LoaderExtension_old = {
 836    {__DRI_DRI2_LOADER, __DRI_DRI2_LOADER_VERSION},
 837    dri2GetBuffers,
 838    dri2FlushFrontBuffer,
 839    NULL,
 840 };
 841
 842 static const __DRIuseInvalidateExtension dri2UseInvalidate = {
 843    { __DRI_USE_INVALIDATE, __DRI_USE_INVALIDATE_VERSION }
 844 };
 845
 846 _X_HIDDEN void
 847 dri2InvalidateBuffers(Display *dpy, XID drawable)
 848 {
 849    __GLXDRIdrawable *pdraw =
 850       dri2GetGlxDrawableFromXDrawableId(dpy, drawable);
 851    struct dri2_screen *psc;
 852    struct dri2_drawable *pdp = (struct dri2_drawable *) pdraw;
 853
 854    if (!pdraw)
 855       return;
 856
 857    psc = (struct dri2_screen *) pdraw->psc;
 858
 859    if (pdraw && psc->f && psc->f->base.version >= 3 && psc->f->invalidate)
 860        psc->f->invalidate(pdp->driDrawable);
 861 }
 862
 863 static void
 864 dri2_bind_tex_image(Display * dpy,
 865                     GLXDrawable drawable,
 866                     int buffer, const int *attrib_list)
 867 {
 868    struct glx_context *gc = __glXGetCurrentContext();
 869    struct dri2_context *pcp = (struct dri2_context *) gc;
 870    __GLXDRIdrawable *base = GetGLXDRIDrawable(dpy, drawable);
 871    struct glx_display *dpyPriv = __glXInitialize(dpy);
 872    struct dri2_drawable *pdraw = (struct dri2_drawable *) base;
 873    struct dri2_display *pdp =
 874       (struct dri2_display *) dpyPriv->dri2Display;
 875    struct dri2_screen *psc;
 876
 877    if (pdraw != NULL) {
 878       psc = (struct dri2_screen *) base->psc;
 879
 880       if (!pdp->invalidateAvailable && psc->f &&
 881            psc->f->base.version >= 3 && psc->f->invalidate)
 882          psc->f->invalidate(pdraw->driDrawable);
 883
 884       if (psc->texBuffer->base.version >= 2 &&
 885           psc->texBuffer->setTexBuffer2 != NULL) {
 886          (*psc->texBuffer->setTexBuffer2) (pcp->driContext,
 887                                            pdraw->base.textureTarget,
 888                                            pdraw->base.textureFormat,
 889                                            pdraw->driDrawable);
 890       }
 891       else {
 892          (*psc->texBuffer->setTexBuffer) (pcp->driContext,
 893                                           pdraw->base.textureTarget,
 894                                           pdraw->driDrawable);
 895       }
 896    }
 897 }
 898
 899 static void
 900 dri2_release_tex_image(Display * dpy, GLXDrawable drawable, int buffer)
 901 {
 902 #if __DRI_TEX_BUFFER_VERSION >= 3
 903    struct glx_context *gc = __glXGetCurrentContext();
 904    struct dri2_context *pcp = (struct dri2_context *) gc;
 905    __GLXDRIdrawable *base = GetGLXDRIDrawable(dpy, drawable);
 906    struct glx_display *dpyPriv = __glXInitialize(dpy);
 907    struct dri2_drawable *pdraw = (struct dri2_drawable *) base;
 908    struct dri2_display *pdp =
 909       (struct dri2_display *) dpyPriv->dri2Display;
 910    struct dri2_screen *psc;
 911
 912    if (pdraw != NULL) {
 913       psc = (struct dri2_screen *) base->psc;
 914
 915       if (psc->texBuffer->base.version >= 3 &&
 916           psc->texBuffer->releaseTexBuffer != NULL) {
 917          (*psc->texBuffer->releaseTexBuffer) (pcp->driContext,
 918                                            pdraw->base.textureTarget,
 919                                            pdraw->driDrawable);
 920       }
 921    }
 922 #endif
 923 }
 924
 925 static const struct glx_context_vtable dri2_context_vtable = {
 926    dri2_destroy_context,
 927    dri2_bind_context,
 928    dri2_unbind_context,
 929    dri2_wait_gl,
 930    dri2_wait_x,
 931    DRI_glXUseXFont,
 932    dri2_bind_tex_image,
 933    dri2_release_tex_image,
 934    NULL, /* get_proc_address */
 935 };
 936
 937 static void
 938 dri2BindExtensions(struct dri2_screen *psc, const __DRIextension **extensions)
 939 {
 940    int i;
 941
 942    __glXEnableDirectExtension(&psc->base, "GLX_SGI_video_sync");
 943    __glXEnableDirectExtension(&psc->base, "GLX_SGI_swap_control");
 944    __glXEnableDirectExtension(&psc->base, "GLX_MESA_swap_control");
 945    __glXEnableDirectExtension(&psc->base, "GLX_SGI_make_current_read");
 946
 947    /* FIXME: if DRI2 version supports it... */
 948    __glXEnableDirectExtension(&psc->base, "INTEL_swap_event");
 949
 950    if (psc->dri2->base.version >= 3) {
 951       const unsigned mask = psc->dri2->getAPIMask(psc->driScreen);
 952
 953       __glXEnableDirectExtension(&psc->base, "GLX_ARB_create_context");
 954       __glXEnableDirectExtension(&psc->base, "GLX_ARB_create_context_profile");
 955
 956       if ((mask & (1 << __DRI_API_GLES2)) != 0)
 957          __glXEnableDirectExtension(&psc->base,
 958                                     "GLX_EXT_create_context_es2_profile");
 959    }
 960
 961    for (i = 0; extensions[i]; i++) {
 962       if ((strcmp(extensions[i]->name, __DRI_TEX_BUFFER) == 0)) {
 963          psc->texBuffer = (__DRItexBufferExtension *) extensions[i];
 964          __glXEnableDirectExtension(&psc->base, "GLX_EXT_texture_from_pixmap");
 965       }
 966
 967       if ((strcmp(extensions[i]->name, __DRI2_FLUSH) == 0)) {
 968          psc->f = (__DRI2flushExtension *) extensions[i];
 969          /* internal driver extension, no GL extension exposed */
 970       }
 971
 972       if ((strcmp(extensions[i]->name, __DRI2_CONFIG_QUERY) == 0))
 973          psc->config = (__DRI2configQueryExtension *) extensions[i];
 974
 975       if (((strcmp(extensions[i]->name, __DRI2_THROTTLE) == 0)))
 976          psc->throttle = (__DRI2throttleExtension *) extensions[i];
 977
 978       /* DRI2 version 3 is also required because
 979        * GLX_ARB_create_context_robustness requires GLX_ARB_create_context.
 980        */
 981       if (psc->dri2->base.version >= 3
 982           && strcmp(extensions[i]->name, __DRI2_ROBUSTNESS) == 0)
 983          __glXEnableDirectExtension(&psc->base,
 984                                     "GLX_ARB_create_context_robustness");
 985    }
 986 }
 987
 988 static const struct glx_screen_vtable dri2_screen_vtable = {
 989    dri2_create_context,
 990    dri2_create_context_attribs
 991 };
 992
 993 static struct glx_screen *
 994 dri2CreateScreen(int screen, struct glx_display * priv)
 995 {
 996    const __DRIconfig **driver_configs;
 997    const __DRIextension **extensions;
 998    const struct dri2_display *const pdp = (struct dri2_display *)
 999       priv->dri2Display;
1000    struct dri2_screen *psc;
1001    __GLXDRIscreen *psp;
1002    struct glx_config *configs = NULL, *visuals = NULL;
1003    char *driverName, *deviceName, *tmp;
1004    drm_magic_t magic;
1005    int i;
1006
1007    psc = calloc(1, sizeof *psc);
1008    if (psc == NULL)
1009       return NULL;
1010
1011    psc->fd = -1;
1012
1013    if (!glx_screen_init(&psc->base, screen, priv)) {
1014       free(psc);
1015       return NULL;
1016    }
1017
1018    if (!DRI2Connect(priv->dpy, RootWindow(priv->dpy, screen),
1019                     &driverName, &deviceName)) {
1020       glx_screen_cleanup(&psc->base);
1021       free(psc);
1022       InfoMessageF("screen %d does not appear to be DRI2 capable\n", screen);
1023       return NULL;
1024    }
1025
1026    psc->driver = driOpenDriver(driverName);
1027    if (psc->driver == NULL) {
1028       ErrorMessageF("driver pointer missing\n");
1029       goto handle_error;
1030    }
1031
1032    extensions = dlsym(psc->driver, __DRI_DRIVER_EXTENSIONS);
1033    if (extensions == NULL) {
1034       ErrorMessageF("driver exports no extensions (%s)\n", dlerror());
1035       goto handle_error;
1036    }
1037
1038    for (i = 0; extensions[i]; i++) {
1039       if (strcmp(extensions[i]->name, __DRI_CORE) == 0)
1040          psc->core = (__DRIcoreExtension *) extensions[i];
1041       if (strcmp(extensions[i]->name, __DRI_DRI2) == 0)
1042          psc->dri2 = (__DRIdri2Extension *) extensions[i];
1043    }
1044
1045    if (psc->core == NULL || psc->dri2 == NULL) {
1046       ErrorMessageF("core dri or dri2 extension not found\n");
1047       goto handle_error;
1048    }
1049
1050 #ifdef O_CLOEXEC
1051    psc->fd = open(deviceName, O_RDWR | O_CLOEXEC);
1052    if (psc->fd == -1 && errno == EINVAL)
1053 #endif
1054    {
1055       psc->fd = open(deviceName, O_RDWR);
1056       if (psc->fd != -1)
1057          fcntl(psc->fd, F_SETFD, fcntl(psc->fd, F_GETFD) | FD_CLOEXEC);
1058    }
1059    if (psc->fd < 0) {
1060       ErrorMessageF("failed to open drm device: %s\n", strerror(errno));
1061       goto handle_error;
1062    }
1063
1064    if (drmGetMagic(psc->fd, &magic)) {
1065       ErrorMessageF("failed to get magic\n");
1066       goto handle_error;
1067    }
1068
1069    if (!DRI2Authenticate(priv->dpy, RootWindow(priv->dpy, screen), magic)) {
1070       ErrorMessageF("failed to authenticate magic %d\n", magic);
1071       goto handle_error;
1072    }
1073
1074
1075    /* If the server does not support the protocol for
1076     * DRI2GetBuffersWithFormat, don't supply that interface to the driver.
1077     */
1078    psc->driScreen =
1079       psc->dri2->createNewScreen(screen, psc->fd,
1080                                  (const __DRIextension **)
1081                                  &pdp->loader_extensions[0],
1082                                  &driver_configs, psc);
1083
1084    if (psc->driScreen == NULL) {
1085       ErrorMessageF("failed to create dri screen\n");
1086       goto handle_error;
1087    }
1088
1089    extensions = psc->core->getExtensions(psc->driScreen);
1090    dri2BindExtensions(psc, extensions);
1091
1092    configs = driConvertConfigs(psc->core, psc->base.configs, driver_configs);
1093    visuals = driConvertConfigs(psc->core, psc->base.visuals, driver_configs);
1094
1095    if (!configs || !visuals)
1096        goto handle_error;
1097
1098    glx_config_destroy_list(psc->base.configs);
1099    psc->base.configs = configs;
1100    glx_config_destroy_list(psc->base.visuals);
1101    psc->base.visuals = visuals;
1102
1103    psc->driver_configs = driver_configs;
1104
1105    psc->base.vtable = &dri2_screen_vtable;
1106    psp = &psc->vtable;
1107    psc->base.driScreen = psp;
1108    psp->destroyScreen = dri2DestroyScreen;
1109    psp->createDrawable = dri2CreateDrawable;
1110    psp->swapBuffers = dri2SwapBuffers;
1111    psp->getDrawableMSC = NULL;
1112    psp->waitForMSC = NULL;
1113    psp->waitForSBC = NULL;
1114    psp->setSwapInterval = NULL;
1115    psp->getSwapInterval = NULL;
1116
1117    if (pdp->driMinor >= 2) {
1118 #ifdef X_DRI2GetMSC
1119       psp->getDrawableMSC = dri2DrawableGetMSC;
1120 #endif
1121 #ifdef X_DRI2WaitMSC
1122       psp->waitForMSC = dri2WaitForMSC;
1123       psp->waitForSBC = dri2WaitForSBC;
1124 #endif
1125 #ifdef X_DRI2SwapInterval
1126       psp->setSwapInterval = dri2SetSwapInterval;
1127       psp->getSwapInterval = dri2GetSwapInterval;
1128 #endif
1129 #if defined(X_DRI2GetMSC) && defined(X_DRI2WaitMSC) && defined(X_DRI2SwapInterval)
1130       __glXEnableDirectExtension(&psc->base, "GLX_OML_sync_control");
1131 #endif
1132    }
1133
1134    /* DRI2 suports SubBuffer through DRI2CopyRegion, so it's always
1135     * available.*/
1136    psp->copySubBuffer = dri2CopySubBuffer;
1137    __glXEnableDirectExtension(&psc->base, "GLX_MESA_copy_sub_buffer");
1138
1139    free(driverName);
1140    free(deviceName);
1141
1142    tmp = getenv("LIBGL_SHOW_FPS");
1143    psc->show_fps = tmp && strcmp(tmp, "1") == 0;
1144
1145    return &psc->base;
1146
1147 handle_error:
1148    CriticalErrorMessageF("failed to load driver: %s\n", driverName);
1149
1150    if (configs)
1151        glx_config_destroy_list(configs);
1152    if (visuals)
1153        glx_config_destroy_list(visuals);
1154    if (psc->driScreen)
1155        psc->core->destroyScreen(psc->driScreen);
1156    psc->driScreen = NULL;
1157    if (psc->fd >= 0)
1158       close(psc->fd);
1159    if (psc->driver)
1160       dlclose(psc->driver);
1161
1162    free(driverName);
1163    free(deviceName);
1164    glx_screen_cleanup(&psc->base);
1165    free(psc);
1166
1167    return NULL;
1168 }
1169
1170 /* Called from __glXFreeDisplayPrivate.
1171  */
1172 static void
1173 dri2DestroyDisplay(__GLXDRIdisplay * dpy)
1174 {
1175    struct dri2_display *pdp = (struct dri2_display *) dpy;
1176
1177    __glxHashDestroy(pdp->dri2Hash);
1178    free(dpy);
1179 }
1180
1181 _X_HIDDEN __GLXDRIdrawable *
1182 dri2GetGlxDrawableFromXDrawableId(Display *dpy, XID id)
1183 {
1184    struct glx_display *d = __glXInitialize(dpy);
1185    struct dri2_display *pdp = (struct dri2_display *) d->dri2Display;
1186    __GLXDRIdrawable *pdraw;
1187
1188    if (__glxHashLookup(pdp->dri2Hash, id, (void *) &pdraw) == 0)
1189       return pdraw;
1190
1191    return NULL;
1192 }
1193
1194 /*
1195  * Allocate, initialize and return a __DRIdisplayPrivate object.
1196  * This is called from __glXInitialize() when we are given a new
1197  * display pointer.
1198  */
1199 _X_HIDDEN __GLXDRIdisplay *
1200 dri2CreateDisplay(Display * dpy)
1201 {
1202    struct dri2_display *pdp;
1203    int eventBase, errorBase, i;
1204
1205    if (!DRI2QueryExtension(dpy, &eventBase, &errorBase))
1206       return NULL;
1207
1208    pdp = malloc(sizeof *pdp);
1209    if (pdp == NULL)
1210       return NULL;
1211
1212    if (!DRI2QueryVersion(dpy, &pdp->driMajor, &pdp->driMinor)) {
1213       free(pdp);
1214       return NULL;
1215    }
1216
1217    pdp->driPatch = 0;
1218    pdp->swapAvailable = (pdp->driMinor >= 2);
1219    pdp->invalidateAvailable = (pdp->driMinor >= 3);
1220
1221    pdp->base.destroyDisplay = dri2DestroyDisplay;
1222    pdp->base.createScreen = dri2CreateScreen;
1223
1224    i = 0;
1225    if (pdp->driMinor < 1)
1226       pdp->loader_extensions[i++] = &dri2LoaderExtension_old.base;
1227    else
1228       pdp->loader_extensions[i++] = &dri2LoaderExtension.base;
1229
1230    pdp->loader_extensions[i++] = &systemTimeExtension.base;
1231
1232    pdp->loader_extensions[i++] = &dri2UseInvalidate.base;
1233
1234    pdp->loader_extensions[i++] = NULL;
1235
1236    pdp->dri2Hash = __glxHashCreate();
1237    if (pdp->dri2Hash == NULL) {
1238       free(pdp);
1239       return NULL;
1240    }
1241
1242    return &pdp->base;
1243 }
1244
1245 #endif /* GLX_DIRECT_RENDERING */