src/glx/dri_glx.c

   1 /**************************************************************************
   2
   3 Copyright 1998-1999 Precision Insight, Inc., Cedar Park, Texas.
   4 All Rights Reserved.
   5
   6 Permission is hereby granted, free of charge, to any person obtaining a
   7 copy of this software and associated documentation files (the
   8 "Software"), to deal in the Software without restriction, including
   9 without limitation the rights to use, copy, modify, merge, publish,
  10 distribute, sub license, and/or sell copies of the Software, and to
  11 permit persons to whom the Software is furnished to do so, subject to
  12 the following conditions:
  13
  14 The above copyright notice and this permission notice (including the
  15 next paragraph) shall be included in all copies or substantial portions
  16 of the Software.
  17
  18 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  19 OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  20 MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  21 IN NO EVENT SHALL PRECISION INSIGHT AND/OR ITS SUPPLIERS BE LIABLE FOR
  22 ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  23 TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  24 SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25
  26 **************************************************************************/
  27
  28 /*
  29  * Authors:
  30  *   Kevin E. Martin <kevin@precisioninsight.com>
  31  *   Brian Paul <brian@precisioninsight.com>
  32  *
  33  */
  34
  35 #if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
  36
  37 #include <X11/Xlib.h>
  38 #include <X11/extensions/Xfixes.h>
  39 #include <X11/extensions/Xdamage.h>
  40 #include "glxclient.h"
  41 #include "xf86dri.h"
  42 #include "dri2.h"
  43 #include "sarea.h"
  44 #include <dlfcn.h>
  45 #include <sys/types.h>
  46 #include <sys/mman.h>
  47 #include "xf86drm.h"
  48 #include "dri_common.h"
  49
  50 struct dri_display
  51 {
  52    __GLXDRIdisplay base;
  53
  54    /*
  55     ** XFree86-DRI version information
  56     */
  57    int driMajor;
  58    int driMinor;
  59    int driPatch;
  60 };
  61
  62 struct dri_screen
  63 {
  64    struct glx_screen base;
  65
  66    __DRIscreen *driScreen;
  67    __GLXDRIscreen vtable;
  68    const __DRIlegacyExtension *legacy;
  69    const __DRIcoreExtension *core;
  70    const __DRIswapControlExtension *swapControl;
  71    const __DRImediaStreamCounterExtension *msc;
  72    const __DRIconfig **driver_configs;
  73    const __DRIcopySubBufferExtension *driCopySubBuffer;
  74
  75    void *driver;
  76    int fd;
  77 };
  78
  79 struct dri_context
  80 {
  81    struct glx_context base;
  82    __DRIcontext *driContext;
  83    XID hwContextID;
  84 };
  85
  86 struct dri_drawable
  87 {
  88    __GLXDRIdrawable base;
  89
  90    __DRIdrawable *driDrawable;
  91 };
  92
  93 static const struct glx_context_vtable dri_context_vtable;
  94
  95 /*
  96  * Given a display pointer and screen number, determine the name of
  97  * the DRI driver for the screen (i.e., "i965", "radeon", "nouveau", etc).
  98  * Return True for success, False for failure.
  99  */
 100 static Bool
 101 driGetDriverName(Display * dpy, int scrNum, char **driverName)
 102 {
 103    int directCapable;
 104    Bool b;
 105    int event, error;
 106    int driverMajor, driverMinor, driverPatch;
 107
 108    *driverName = NULL;
 109
 110    if (XF86DRIQueryExtension(dpy, &event, &error)) {    /* DRI1 */
 111       if (!XF86DRIQueryDirectRenderingCapable(dpy, scrNum, &directCapable)) {
 112          ErrorMessageF("XF86DRIQueryDirectRenderingCapable failed\n");
 113          return False;
 114       }
 115       if (!directCapable) {
 116          ErrorMessageF("XF86DRIQueryDirectRenderingCapable returned false\n");
 117          return False;
 118       }
 119
 120       b = XF86DRIGetClientDriverName(dpy, scrNum, &driverMajor, &driverMinor,
 121                                      &driverPatch, driverName);
 122       if (!b) {
 123          ErrorMessageF("Cannot determine driver name for screen %d\n",
 124                        scrNum);
 125          return False;
 126       }
 127
 128       InfoMessageF("XF86DRIGetClientDriverName: %d.%d.%d %s (screen %d)\n",
 129                    driverMajor, driverMinor, driverPatch, *driverName,
 130                    scrNum);
 131
 132       return True;
 133    }
 134    else if (DRI2QueryExtension(dpy, &event, &error)) {  /* DRI2 */
 135       char *dev;
 136       Bool ret = DRI2Connect(dpy, RootWindow(dpy, scrNum), driverName, &dev);
 137
 138       if (ret)
 139          free(dev);
 140
 141       return ret;
 142    }
 143
 144    return False;
 145 }
 146
 147 /*
 148  * Exported function for querying the DRI driver for a given screen.
 149  *
 150  * The returned char pointer points to a static array that will be
 151  * overwritten by subsequent calls.
 152  */
 153 _X_EXPORT const char *
 154 glXGetScreenDriver(Display * dpy, int scrNum)
 155 {
 156    static char ret[32];
 157    char *driverName;
 158    if (driGetDriverName(dpy, scrNum, &driverName)) {
 159       int len;
 160       if (!driverName)
 161          return NULL;
 162       len = strlen(driverName);
 163       if (len >= 31)
 164          return NULL;
 165       memcpy(ret, driverName, len + 1);
 166       free(driverName);
 167       return ret;
 168    }
 169    return NULL;
 170 }
 171
 172 /*
 173  * Exported function for obtaining a driver's option list (UTF-8 encoded XML).
 174  *
 175  * The returned char pointer points directly into the driver. Therefore
 176  * it should be treated as a constant.
 177  *
 178  * If the driver was not found or does not support configuration NULL is
 179  * returned.
 180  *
 181  * Note: The driver remains opened after this function returns.
 182  */
 183 _X_EXPORT const char *
 184 glXGetDriverConfig(const char *driverName)
 185 {
 186    void *handle = driOpenDriver(driverName);
 187    if (handle)
 188       return dlsym(handle, "__driConfigOptions");
 189    else
 190       return NULL;
 191 }
 192
 193 #ifdef XDAMAGE_1_1_INTERFACE
 194
 195 static GLboolean
 196 has_damage_post(Display * dpy)
 197 {
 198    static GLboolean inited = GL_FALSE;
 199    static GLboolean has_damage;
 200
 201    if (!inited) {
 202       int major, minor;
 203
 204       if (XDamageQueryVersion(dpy, &major, &minor) &&
 205           major == 1 && minor >= 1) {
 206          has_damage = GL_TRUE;
 207       }
 208       else {
 209          has_damage = GL_FALSE;
 210       }
 211       inited = GL_TRUE;
 212    }
 213
 214    return has_damage;
 215 }
 216
 217 static void
 218 __glXReportDamage(__DRIdrawable * driDraw,
 219                   int x, int y,
 220                   drm_clip_rect_t * rects, int num_rects,
 221                   GLboolean front_buffer, void *loaderPrivate)
 222 {
 223    XRectangle *xrects;
 224    XserverRegion region;
 225    int i;
 226    int x_off, y_off;
 227    __GLXDRIdrawable *glxDraw = loaderPrivate;
 228    struct glx_screen *psc = glxDraw->psc;
 229    Display *dpy = psc->dpy;
 230    Drawable drawable;
 231
 232    if (!has_damage_post(dpy))
 233       return;
 234
 235    if (front_buffer) {
 236       x_off = x;
 237       y_off = y;
 238       drawable = RootWindow(dpy, psc->scr);
 239    }
 240    else {
 241       x_off = 0;
 242       y_off = 0;
 243       drawable = glxDraw->xDrawable;
 244    }
 245
 246    xrects = malloc(sizeof(XRectangle) * num_rects);
 247    if (xrects == NULL)
 248       return;
 249
 250    for (i = 0; i < num_rects; i++) {
 251       xrects[i].x = rects[i].x1 + x_off;
 252       xrects[i].y = rects[i].y1 + y_off;
 253       xrects[i].width = rects[i].x2 - rects[i].x1;
 254       xrects[i].height = rects[i].y2 - rects[i].y1;
 255    }
 256    region = XFixesCreateRegion(dpy, xrects, num_rects);
 257    free(xrects);
 258    XDamageAdd(dpy, drawable, region);
 259    XFixesDestroyRegion(dpy, region);
 260 }
 261
 262 static const __DRIdamageExtension damageExtension = {
 263    {__DRI_DAMAGE, __DRI_DAMAGE_VERSION},
 264    __glXReportDamage,
 265 };
 266
 267 #endif
 268
 269 static GLboolean
 270 __glXDRIGetDrawableInfo(__DRIdrawable * drawable,
 271                         unsigned int *index, unsigned int *stamp,
 272                         int *X, int *Y, int *W, int *H,
 273                         int *numClipRects, drm_clip_rect_t ** pClipRects,
 274                         int *backX, int *backY,
 275                         int *numBackClipRects,
 276                         drm_clip_rect_t ** pBackClipRects,
 277                         void *loaderPrivate)
 278 {
 279    __GLXDRIdrawable *glxDraw = loaderPrivate;
 280    struct glx_screen *psc = glxDraw->psc;
 281    Display *dpy = psc->dpy;
 282
 283    return XF86DRIGetDrawableInfo(dpy, psc->scr, glxDraw->drawable,
 284                                  index, stamp, X, Y, W, H,
 285                                  numClipRects, pClipRects,
 286                                  backX, backY,
 287                                  numBackClipRects, pBackClipRects);
 288 }
 289
 290 static const __DRIgetDrawableInfoExtension getDrawableInfoExtension = {
 291    {__DRI_GET_DRAWABLE_INFO, __DRI_GET_DRAWABLE_INFO_VERSION},
 292    __glXDRIGetDrawableInfo
 293 };
 294
 295 static const __DRIextension *loader_extensions[] = {
 296    &systemTimeExtension.base,
 297    &getDrawableInfoExtension.base,
 298 #ifdef XDAMAGE_1_1_INTERFACE
 299    &damageExtension.base,
 300 #endif
 301    NULL
 302 };
 303
 304 /**
 305  * Perform the required libGL-side initialization and call the client-side
 306  * driver's \c __driCreateNewScreen function.
 307  *
 308  * \param dpy    Display pointer.
 309  * \param scrn   Screen number on the display.
 310  * \param psc    DRI screen information.
 311  * \param driDpy DRI display information.
 312  * \param createNewScreen  Pointer to the client-side driver's
 313  *               \c __driCreateNewScreen function.
 314  * \returns A pointer to the \c __DRIscreen structure returned by
 315  *          the client-side driver on success, or \c NULL on failure.
 316  */
 317 static void *
 318 CallCreateNewScreen(Display *dpy, int scrn, struct dri_screen *psc,
 319                     struct dri_display * driDpy)
 320 {
 321    void *psp = NULL;
 322    drm_handle_t hSAREA;
 323    drmAddress pSAREA = MAP_FAILED;
 324    char *BusID;
 325    __DRIversion ddx_version;
 326    __DRIversion dri_version;
 327    __DRIversion drm_version;
 328    __DRIframebuffer framebuffer;
 329    int fd = -1;
 330    int status;
 331
 332    drm_magic_t magic;
 333    drmVersionPtr version;
 334    int newlyopened;
 335    char *driverName;
 336    drm_handle_t hFB;
 337    int junk;
 338    const __DRIconfig **driver_configs;
 339    struct glx_config *visual, *configs = NULL, *visuals = NULL;
 340
 341    /* DRI protocol version. */
 342    dri_version.major = driDpy->driMajor;
 343    dri_version.minor = driDpy->driMinor;
 344    dri_version.patch = driDpy->driPatch;
 345
 346    framebuffer.base = MAP_FAILED;
 347    framebuffer.dev_priv = NULL;
 348    framebuffer.size = 0;
 349
 350    if (!XF86DRIOpenConnection(dpy, scrn, &hSAREA, &BusID)) {
 351       ErrorMessageF("XF86DRIOpenConnection failed\n");
 352       goto handle_error;
 353    }
 354
 355    fd = drmOpenOnce(NULL, BusID, &newlyopened);
 356
 357    free(BusID);                /* No longer needed */
 358
 359    if (fd < 0) {
 360       ErrorMessageF("drmOpenOnce failed (%s)\n", strerror(-fd));
 361       goto handle_error;
 362    }
 363
 364    if (drmGetMagic(fd, &magic)) {
 365       ErrorMessageF("drmGetMagic failed\n");
 366       goto handle_error;
 367    }
 368
 369    version = drmGetVersion(fd);
 370    if (version) {
 371       drm_version.major = version->version_major;
 372       drm_version.minor = version->version_minor;
 373       drm_version.patch = version->version_patchlevel;
 374       drmFreeVersion(version);
 375    }
 376    else {
 377       drm_version.major = -1;
 378       drm_version.minor = -1;
 379       drm_version.patch = -1;
 380    }
 381
 382    if (newlyopened && !XF86DRIAuthConnection(dpy, scrn, magic)) {
 383       ErrorMessageF("XF86DRIAuthConnection failed\n");
 384       goto handle_error;
 385    }
 386
 387    /* Get device name (like "radeon") and the ddx version numbers.
 388     * We'll check the version in each DRI driver's "createNewScreen"
 389     * function. */
 390    if (!XF86DRIGetClientDriverName(dpy, scrn,
 391                                    &ddx_version.major,
 392                                    &ddx_version.minor,
 393                                    &ddx_version.patch, &driverName)) {
 394       ErrorMessageF("XF86DRIGetClientDriverName failed\n");
 395       goto handle_error;
 396    }
 397
 398    free(driverName);           /* No longer needed. */
 399
 400    /*
 401     * Get device-specific info.  pDevPriv will point to a struct
 402     * (such as DRIRADEONRec in xfree86/driver/ati/radeon_dri.h) that
 403     * has information about the screen size, depth, pitch, ancilliary
 404     * buffers, DRM mmap handles, etc.
 405     */
 406    if (!XF86DRIGetDeviceInfo(dpy, scrn, &hFB, &junk,
 407                              &framebuffer.size, &framebuffer.stride,
 408                              &framebuffer.dev_priv_size,
 409                              &framebuffer.dev_priv)) {
 410       ErrorMessageF("XF86DRIGetDeviceInfo failed");
 411       goto handle_error;
 412    }
 413
 414    framebuffer.width = DisplayWidth(dpy, scrn);
 415    framebuffer.height = DisplayHeight(dpy, scrn);
 416
 417    /* Map the framebuffer region. */
 418    status = drmMap(fd, hFB, framebuffer.size,
 419                    (drmAddressPtr) & framebuffer.base);
 420    if (status != 0) {
 421       ErrorMessageF("drmMap of framebuffer failed (%s)", strerror(-status));
 422       goto handle_error;
 423    }
 424
 425    /* Map the SAREA region.  Further mmap regions may be setup in
 426     * each DRI driver's "createNewScreen" function.
 427     */
 428    status = drmMap(fd, hSAREA, SAREA_MAX, &pSAREA);
 429    if (status != 0) {
 430       ErrorMessageF("drmMap of SAREA failed (%s)", strerror(-status));
 431       goto handle_error;
 432    }
 433
 434    psp = (*psc->legacy->createNewScreen) (scrn,
 435                                           &ddx_version,
 436                                           &dri_version,
 437                                           &drm_version,
 438                                           &framebuffer,
 439                                           pSAREA,
 440                                           fd,
 441                                           loader_extensions,
 442                                           &driver_configs, psc);
 443
 444    if (psp == NULL) {
 445       ErrorMessageF("Calling driver entry point failed");
 446       goto handle_error;
 447    }
 448
 449    configs = driConvertConfigs(psc->core, psc->base.configs, driver_configs);
 450    visuals = driConvertConfigs(psc->core, psc->base.visuals, driver_configs);
 451
 452    if (!configs || !visuals)
 453        goto handle_error;
 454
 455    glx_config_destroy_list(psc->base.configs);
 456    psc->base.configs = configs;
 457    glx_config_destroy_list(psc->base.visuals);
 458    psc->base.visuals = visuals;
 459
 460    psc->driver_configs = driver_configs;
 461
 462    /* Visuals with depth != screen depth are subject to automatic compositing
 463     * in the X server, so DRI1 can't render to them properly. Mark them as
 464     * non-conformant to prevent apps from picking them up accidentally.
 465     */
 466    for (visual = psc->base.visuals; visual; visual = visual->next) {
 467       XVisualInfo template;
 468       XVisualInfo *visuals;
 469       int num_visuals;
 470       long mask;
 471
 472       template.visualid = visual->visualID;
 473       mask = VisualIDMask;
 474       visuals = XGetVisualInfo(dpy, mask, &template, &num_visuals);
 475
 476       if (visuals) {
 477          if (num_visuals > 0 && visuals->depth != DefaultDepth(dpy, scrn))
 478             visual->visualRating = GLX_NON_CONFORMANT_CONFIG;
 479
 480          free(visuals);
 481       }
 482    }
 483
 484    return psp;
 485
 486  handle_error:
 487    if (configs)
 488        glx_config_destroy_list(configs);
 489    if (visuals)
 490        glx_config_destroy_list(visuals);
 491
 492    if (pSAREA != MAP_FAILED)
 493       drmUnmap(pSAREA, SAREA_MAX);
 494
 495    if (framebuffer.base != MAP_FAILED)
 496       drmUnmap((drmAddress) framebuffer.base, framebuffer.size);
 497
 498    free(framebuffer.dev_priv);
 499
 500    if (fd >= 0)
 501       drmCloseOnce(fd);
 502
 503    XF86DRICloseConnection(dpy, scrn);
 504
 505    ErrorMessageF("reverting to software direct rendering\n");
 506
 507    return NULL;
 508 }
 509
 510 static void
 511 dri_destroy_context(struct glx_context * context)
 512 {
 513    struct dri_context *pcp = (struct dri_context *) context;
 514    struct dri_screen *psc = (struct dri_screen *) context->psc;
 515
 516    driReleaseDrawables(&pcp->base);
 517
 518    free((char *) context->extensions);
 519
 520    (*psc->core->destroyContext) (pcp->driContext);
 521
 522    XF86DRIDestroyContext(psc->base.dpy, psc->base.scr, pcp->hwContextID);
 523    free(pcp);
 524 }
 525
 526 static int
 527 dri_bind_context(struct glx_context *context, struct glx_context *old,
 528                  GLXDrawable draw, GLXDrawable read)
 529 {
 530    struct dri_context *pcp = (struct dri_context *) context;
 531    struct dri_screen *psc = (struct dri_screen *) pcp->base.psc;
 532    struct dri_drawable *pdraw, *pread;
 533
 534    pdraw = (struct dri_drawable *) driFetchDrawable(context, draw);
 535    pread = (struct dri_drawable *) driFetchDrawable(context, read);
 536
 537    driReleaseDrawables(&pcp->base);
 538
 539    if (pdraw == NULL || pread == NULL)
 540       return GLXBadDrawable;
 541
 542    if ((*psc->core->bindContext) (pcp->driContext,
 543                                   pdraw->driDrawable, pread->driDrawable))
 544       return Success;
 545
 546    return GLXBadContext;
 547 }
 548
 549 static void
 550 dri_unbind_context(struct glx_context *context, struct glx_context *new)
 551 {
 552    struct dri_context *pcp = (struct dri_context *) context;
 553    struct dri_screen *psc = (struct dri_screen *) pcp->base.psc;
 554
 555    (*psc->core->unbindContext) (pcp->driContext);
 556 }
 557
 558 static const struct glx_context_vtable dri_context_vtable = {
 559    dri_destroy_context,
 560    dri_bind_context,
 561    dri_unbind_context,
 562    NULL,
 563    NULL,
 564    DRI_glXUseXFont,
 565    NULL,
 566    NULL,
 567    NULL, /* get_proc_address */
 568 };
 569
 570 static struct glx_context *
 571 dri_create_context(struct glx_screen *base,
 572                    struct glx_config *config_base,
 573                    struct glx_context *shareList, int renderType)
 574 {
 575    struct dri_context *pcp, *pcp_shared;
 576    struct dri_screen *psc = (struct dri_screen *) base;
 577    drm_context_t hwContext;
 578    __DRIcontext *shared = NULL;
 579    __GLXDRIconfigPrivate *config = (__GLXDRIconfigPrivate *) config_base;
 580
 581    if (!psc->base.driScreen)
 582       return NULL;
 583
 584    if (shareList) {
 585       /* If the shareList context is not a DRI context, we cannot possibly
 586        * create a DRI context that shares it.
 587        */
 588       if (shareList->vtable->destroy != dri_destroy_context) {
 589          return NULL;
 590       }
 591
 592       pcp_shared = (struct dri_context *) shareList;
 593       shared = pcp_shared->driContext;
 594    }
 595
 596    pcp = calloc(1, sizeof *pcp);
 597    if (pcp == NULL)
 598       return NULL;
 599
 600    if (!glx_context_init(&pcp->base, &psc->base, &config->base)) {
 601       free(pcp);
 602       return NULL;
 603    }
 604
 605    if (!XF86DRICreateContextWithConfig(psc->base.dpy, psc->base.scr,
 606                                        config->base.visualID,
 607                                        &pcp->hwContextID, &hwContext)) {
 608       free(pcp);
 609       return NULL;
 610    }
 611
 612    pcp->driContext =
 613       (*psc->legacy->createNewContext) (psc->driScreen,
 614                                         config->driConfig,
 615                                         renderType, shared, hwContext, pcp);
 616    if (pcp->driContext == NULL) {
 617       XF86DRIDestroyContext(psc->base.dpy, psc->base.scr, pcp->hwContextID);
 618       free(pcp);
 619       return NULL;
 620    }
 621
 622    pcp->base.vtable = &dri_context_vtable;
 623
 624    return &pcp->base;
 625 }
 626
 627 static void
 628 driDestroyDrawable(__GLXDRIdrawable * pdraw)
 629 {
 630    struct dri_screen *psc = (struct dri_screen *) pdraw->psc;
 631    struct dri_drawable *pdp = (struct dri_drawable *) pdraw;
 632
 633    (*psc->core->destroyDrawable) (pdp->driDrawable);
 634    XF86DRIDestroyDrawable(psc->base.dpy, psc->base.scr, pdraw->drawable);
 635    free(pdraw);
 636 }
 637
 638 static __GLXDRIdrawable *
 639 driCreateDrawable(struct glx_screen *base,
 640                   XID xDrawable,
 641                   GLXDrawable drawable, struct glx_config *config_base)
 642 {
 643    drm_drawable_t hwDrawable;
 644    void *empty_attribute_list = NULL;
 645    __GLXDRIconfigPrivate *config = (__GLXDRIconfigPrivate *) config_base;
 646    struct dri_screen *psc = (struct dri_screen *) base;
 647    struct dri_drawable *pdp;
 648
 649    /* Old dri can't handle GLX 1.3+ drawable constructors. */
 650    if (xDrawable != drawable)
 651       return NULL;
 652
 653    pdp = calloc(1, sizeof *pdp);
 654    if (!pdp)
 655       return NULL;
 656
 657    pdp->base.drawable = drawable;
 658    pdp->base.psc = &psc->base;
 659
 660    if (!XF86DRICreateDrawable(psc->base.dpy, psc->base.scr,
 661                               drawable, &hwDrawable)) {
 662       free(pdp);
 663       return NULL;
 664    }
 665
 666    /* Create a new drawable */
 667    pdp->driDrawable =
 668       (*psc->legacy->createNewDrawable) (psc->driScreen,
 669                                          config->driConfig,
 670                                          hwDrawable,
 671                                          GLX_WINDOW_BIT,
 672                                          empty_attribute_list, pdp);
 673
 674    if (!pdp->driDrawable) {
 675       XF86DRIDestroyDrawable(psc->base.dpy, psc->base.scr, drawable);
 676       free(pdp);
 677       return NULL;
 678    }
 679
 680    pdp->base.destroyDrawable = driDestroyDrawable;
 681
 682    return &pdp->base;
 683 }
 684
 685 static int64_t
 686 driSwapBuffers(__GLXDRIdrawable * pdraw, int64_t unused1, int64_t unused2,
 687                int64_t unused3)
 688 {
 689    struct dri_screen *psc = (struct dri_screen *) pdraw->psc;
 690    struct dri_drawable *pdp = (struct dri_drawable *) pdraw;
 691
 692    (*psc->core->swapBuffers) (pdp->driDrawable);
 693    return 0;
 694 }
 695
 696 static void
 697 driCopySubBuffer(__GLXDRIdrawable * pdraw,
 698                  int x, int y, int width, int height)
 699 {
 700    struct dri_drawable *pdp = (struct dri_drawable *) pdraw;
 701    struct dri_screen *psc = (struct dri_screen *) pdp->base.psc;
 702
 703    (*psc->driCopySubBuffer->copySubBuffer) (pdp->driDrawable,
 704                                             x, y, width, height);
 705 }
 706
 707 static void
 708 driDestroyScreen(struct glx_screen *base)
 709 {
 710    struct dri_screen *psc = (struct dri_screen *) base;
 711
 712    /* Free the direct rendering per screen data */
 713    if (psc->driScreen)
 714       (*psc->core->destroyScreen) (psc->driScreen);
 715    driDestroyConfigs(psc->driver_configs);
 716    psc->driScreen = NULL;
 717    if (psc->driver)
 718       dlclose(psc->driver);
 719 }
 720
 721 #ifdef __DRI_SWAP_BUFFER_COUNTER
 722
 723 static int
 724 driDrawableGetMSC(struct glx_screen *base, __GLXDRIdrawable *pdraw,
 725                    int64_t *ust, int64_t *msc, int64_t *sbc)
 726 {
 727    struct dri_screen *psc = (struct dri_screen *) base;
 728    struct dri_drawable *pdp = (struct dri_drawable *) pdraw;
 729
 730    if (pdp && psc->sbc && psc->msc)
 731       return ( (*psc->msc->getMSC)(psc->driScreen, msc) == 0 &&
 732                (*psc->sbc->getSBC)(pdp->driDrawable, sbc) == 0 &&
 733                __glXGetUST(ust) == 0 );
 734 }
 735
 736 static int
 737 driWaitForMSC(__GLXDRIdrawable *pdraw, int64_t target_msc, int64_t divisor,
 738                int64_t remainder, int64_t *ust, int64_t *msc, int64_t *sbc)
 739 {
 740    struct dri_screen *psc = (struct dri_screen *) pdraw->psc;
 741    struct dri_drawable *pdp = (struct dri_drawable *) pdraw;
 742
 743    if (pdp != NULL && psc->msc != NULL) {
 744       ret = (*psc->msc->waitForMSC) (pdp->driDrawable, target_msc,
 745                                      divisor, remainder, msc, sbc);
 746
 747       /* __glXGetUST returns zero on success and non-zero on failure.
 748        * This function returns True on success and False on failure.
 749        */
 750       return ret == 0 && __glXGetUST(ust) == 0;
 751    }
 752 }
 753
 754 static int
 755 driWaitForSBC(__GLXDRIdrawable *pdraw, int64_t target_sbc, int64_t *ust,
 756                int64_t *msc, int64_t *sbc)
 757 {
 758    struct dri_drawable *pdp = (struct dri_drawable *) pdraw;
 759
 760    if (pdp != NULL && psc->sbc != NULL) {
 761       ret =
 762          (*psc->sbc->waitForSBC) (pdp->driDrawable, target_sbc, msc, sbc);
 763
 764       /* __glXGetUST returns zero on success and non-zero on failure.
 765        * This function returns True on success and False on failure.
 766        */
 767       return ((ret == 0) && (__glXGetUST(ust) == 0));
 768    }
 769
 770    return DRI2WaitSBC(pdp->base.psc->dpy,
 771                       pdp->base.xDrawable, target_sbc, ust, msc, sbc);
 772 }
 773
 774 #endif
 775
 776 static int
 777 driSetSwapInterval(__GLXDRIdrawable *pdraw, int interval)
 778 {
 779    struct dri_drawable *pdp = (struct dri_drawable *) pdraw;
 780    struct dri_screen *psc = (struct dri_screen *) pdraw->psc;
 781
 782    if (psc->swapControl != NULL && pdraw != NULL) {
 783       psc->swapControl->setSwapInterval(pdp->driDrawable, interval);
 784       return 0;
 785    }
 786
 787    return GLX_BAD_CONTEXT;
 788 }
 789
 790 static int
 791 driGetSwapInterval(__GLXDRIdrawable *pdraw)
 792 {
 793    struct dri_drawable *pdp = (struct dri_drawable *) pdraw;
 794    struct dri_screen *psc = (struct dri_screen *) pdraw->psc;
 795
 796    if (psc->swapControl != NULL && pdraw != NULL)
 797       return psc->swapControl->getSwapInterval(pdp->driDrawable);
 798
 799    return 0;
 800 }
 801
 802 /* Bind DRI1 specific extensions */
 803 static void
 804 driBindExtensions(struct dri_screen *psc, const __DRIextension **extensions)
 805 {
 806    int i;
 807
 808    for (i = 0; extensions[i]; i++) {
 809       /* No DRI2 support for swap_control at the moment, since SwapBuffers
 810        * is done by the X server */
 811       if (strcmp(extensions[i]->name, __DRI_SWAP_CONTROL) == 0) {
 812          psc->swapControl = (__DRIswapControlExtension *) extensions[i];
 813          __glXEnableDirectExtension(&psc->base, "GLX_SGI_swap_control");
 814          __glXEnableDirectExtension(&psc->base, "GLX_MESA_swap_control");
 815       }
 816
 817       if (strcmp(extensions[i]->name, __DRI_MEDIA_STREAM_COUNTER) == 0) {
 818          psc->msc = (__DRImediaStreamCounterExtension *) extensions[i];
 819          __glXEnableDirectExtension(&psc->base, "GLX_SGI_video_sync");
 820       }
 821
 822       if (strcmp(extensions[i]->name, __DRI_COPY_SUB_BUFFER) == 0) {
 823          psc->driCopySubBuffer = (__DRIcopySubBufferExtension *) extensions[i];
 824          __glXEnableDirectExtension(&psc->base, "GLX_MESA_copy_sub_buffer");
 825       }
 826
 827       if (strcmp(extensions[i]->name, __DRI_READ_DRAWABLE) == 0) {
 828          __glXEnableDirectExtension(&psc->base, "GLX_SGI_make_current_read");
 829       }
 830       /* Ignore unknown extensions */
 831    }
 832 }
 833
 834 static const struct glx_screen_vtable dri_screen_vtable = {
 835    dri_create_context,
 836    NULL
 837 };
 838
 839 static struct glx_screen *
 840 driCreateScreen(int screen, struct glx_display *priv)
 841 {
 842    struct dri_display *pdp;
 843    __GLXDRIscreen *psp;
 844    const __DRIextension **extensions;
 845    struct dri_screen *psc;
 846    char *driverName;
 847    int i;
 848
 849    psc = calloc(1, sizeof *psc);
 850    if (psc == NULL)
 851       return NULL;
 852
 853    if (!glx_screen_init(&psc->base, screen, priv)) {
 854       free(psc);
 855       return NULL;
 856    }
 857
 858    if (!driGetDriverName(priv->dpy, screen, &driverName)) {
 859       goto cleanup;
 860    }
 861
 862    psc->driver = driOpenDriver(driverName);
 863    free(driverName);
 864    if (psc->driver == NULL)
 865       goto cleanup;
 866
 867    extensions = dlsym(psc->driver, __DRI_DRIVER_EXTENSIONS);
 868    if (extensions == NULL) {
 869       ErrorMessageF("driver exports no extensions (%s)\n", dlerror());
 870       goto cleanup;
 871    }
 872
 873    for (i = 0; extensions[i]; i++) {
 874       if (strcmp(extensions[i]->name, __DRI_CORE) == 0)
 875          psc->core = (__DRIcoreExtension *) extensions[i];
 876       if (strcmp(extensions[i]->name, __DRI_LEGACY) == 0)
 877          psc->legacy = (__DRIlegacyExtension *) extensions[i];
 878    }
 879
 880    if (psc->core == NULL || psc->legacy == NULL)
 881       goto cleanup;
 882
 883    pdp = (struct dri_display *) priv->driDisplay;
 884    psc->driScreen =
 885       CallCreateNewScreen(psc->base.dpy, screen, psc, pdp);
 886    if (psc->driScreen == NULL)
 887       goto cleanup;
 888
 889    extensions = psc->core->getExtensions(psc->driScreen);
 890    driBindExtensions(psc, extensions);
 891
 892    psc->base.vtable = &dri_screen_vtable;
 893    psp = &psc->vtable;
 894    psc->base.driScreen = psp;
 895    if (psc->driCopySubBuffer)
 896       psp->copySubBuffer = driCopySubBuffer;
 897
 898    psp->destroyScreen = driDestroyScreen;
 899    psp->createDrawable = driCreateDrawable;
 900    psp->swapBuffers = driSwapBuffers;
 901
 902 #ifdef __DRI_SWAP_BUFFER_COUNTER
 903    psp->getDrawableMSC = driDrawableGetMSC;
 904    psp->waitForMSC = driWaitForMSC;
 905    psp->waitForSBC = driWaitForSBC;
 906 #endif
 907
 908    psp->setSwapInterval = driSetSwapInterval;
 909    psp->getSwapInterval = driGetSwapInterval;
 910
 911    return &psc->base;
 912
 913 cleanup:
 914    CriticalErrorMessageF("failed to load driver: %s\n", driverName);
 915
 916    if (psc->driver)
 917       dlclose(psc->driver);
 918    glx_screen_cleanup(&psc->base);
 919    free(psc);
 920
 921    return NULL;
 922 }
 923
 924 /* Called from __glXFreeDisplayPrivate.
 925  */
 926 static void
 927 driDestroyDisplay(__GLXDRIdisplay * dpy)
 928 {
 929    free(dpy);
 930 }
 931
 932 /*
 933  * Allocate, initialize and return a __DRIdisplayPrivate object.
 934  * This is called from __glXInitialize() when we are given a new
 935  * display pointer.
 936  */
 937 _X_HIDDEN __GLXDRIdisplay *
 938 driCreateDisplay(Display * dpy)
 939 {
 940    struct dri_display *pdpyp;
 941    int eventBase, errorBase;
 942    int major, minor, patch;
 943
 944    if (!XF86DRIQueryExtension(dpy, &eventBase, &errorBase)) {
 945       return NULL;
 946    }
 947
 948    if (!XF86DRIQueryVersion(dpy, &major, &minor, &patch)) {
 949       return NULL;
 950    }
 951
 952    pdpyp = malloc(sizeof *pdpyp);
 953    if (!pdpyp) {
 954       return NULL;
 955    }
 956
 957    pdpyp->driMajor = major;
 958    pdpyp->driMinor = minor;
 959    pdpyp->driPatch = patch;
 960
 961    pdpyp->base.destroyDisplay = driDestroyDisplay;
 962    pdpyp->base.createScreen = driCreateScreen;
 963
 964    return &pdpyp->base;
 965 }
 966
 967 #endif /* GLX_DIRECT_RENDERING */