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    if (framebuffer.dev_priv != NULL)
 499       free(framebuffer.dev_priv);
 500
 501    if (fd >= 0)
 502       drmCloseOnce(fd);
 503
 504    XF86DRICloseConnection(dpy, scrn);
 505
 506    ErrorMessageF("reverting to software direct rendering\n");
 507
 508    return NULL;
 509 }
 510
 511 static void
 512 dri_destroy_context(struct glx_context * context)
 513 {
 514    struct dri_context *pcp = (struct dri_context *) context;
 515    struct dri_screen *psc = (struct dri_screen *) context->psc;
 516
 517    driReleaseDrawables(&pcp->base);
 518
 519    if (context->extensions)
 520       free((char *) context->extensions);
 521
 522    (*psc->core->destroyContext) (pcp->driContext);
 523
 524    XF86DRIDestroyContext(psc->base.dpy, psc->base.scr, pcp->hwContextID);
 525    free(pcp);
 526 }
 527
 528 static int
 529 dri_bind_context(struct glx_context *context, struct glx_context *old,
 530                  GLXDrawable draw, GLXDrawable read)
 531 {
 532    struct dri_context *pcp = (struct dri_context *) context;
 533    struct dri_screen *psc = (struct dri_screen *) pcp->base.psc;
 534    struct dri_drawable *pdraw, *pread;
 535
 536    pdraw = (struct dri_drawable *) driFetchDrawable(context, draw);
 537    pread = (struct dri_drawable *) driFetchDrawable(context, read);
 538
 539    driReleaseDrawables(&pcp->base);
 540
 541    if (pdraw == NULL || pread == NULL)
 542       return GLXBadDrawable;
 543
 544    if ((*psc->core->bindContext) (pcp->driContext,
 545                                   pdraw->driDrawable, pread->driDrawable))
 546       return Success;
 547
 548    return GLXBadContext;
 549 }
 550
 551 static void
 552 dri_unbind_context(struct glx_context *context, struct glx_context *new)
 553 {
 554    struct dri_context *pcp = (struct dri_context *) context;
 555    struct dri_screen *psc = (struct dri_screen *) pcp->base.psc;
 556
 557    (*psc->core->unbindContext) (pcp->driContext);
 558 }
 559
 560 static const struct glx_context_vtable dri_context_vtable = {
 561    dri_destroy_context,
 562    dri_bind_context,
 563    dri_unbind_context,
 564    NULL,
 565    NULL,
 566    DRI_glXUseXFont,
 567    NULL,
 568    NULL,
 569    NULL, /* get_proc_address */
 570 };
 571
 572 static struct glx_context *
 573 dri_create_context(struct glx_screen *base,
 574                    struct glx_config *config_base,
 575                    struct glx_context *shareList, int renderType)
 576 {
 577    struct dri_context *pcp, *pcp_shared;
 578    struct dri_screen *psc = (struct dri_screen *) base;
 579    drm_context_t hwContext;
 580    __DRIcontext *shared = NULL;
 581    __GLXDRIconfigPrivate *config = (__GLXDRIconfigPrivate *) config_base;
 582
 583    if (!psc->base.driScreen)
 584       return NULL;
 585
 586    if (shareList) {
 587       /* If the shareList context is not a DRI context, we cannot possibly
 588        * create a DRI context that shares it.
 589        */
 590       if (shareList->vtable->destroy != dri_destroy_context) {
 591          return NULL;
 592       }
 593
 594       pcp_shared = (struct dri_context *) shareList;
 595       shared = pcp_shared->driContext;
 596    }
 597
 598    pcp = malloc(sizeof *pcp);
 599    if (pcp == NULL)
 600       return NULL;
 601
 602    memset(pcp, 0, sizeof *pcp);
 603    if (!glx_context_init(&pcp->base, &psc->base, &config->base)) {
 604       free(pcp);
 605       return NULL;
 606    }
 607
 608    if (!XF86DRICreateContextWithConfig(psc->base.dpy, psc->base.scr,
 609                                        config->base.visualID,
 610                                        &pcp->hwContextID, &hwContext)) {
 611       free(pcp);
 612       return NULL;
 613    }
 614
 615    pcp->driContext =
 616       (*psc->legacy->createNewContext) (psc->driScreen,
 617                                         config->driConfig,
 618                                         renderType, shared, hwContext, pcp);
 619    if (pcp->driContext == NULL) {
 620       XF86DRIDestroyContext(psc->base.dpy, psc->base.scr, pcp->hwContextID);
 621       free(pcp);
 622       return NULL;
 623    }
 624
 625    pcp->base.vtable = &dri_context_vtable;
 626
 627    return &pcp->base;
 628 }
 629
 630 static void
 631 driDestroyDrawable(__GLXDRIdrawable * pdraw)
 632 {
 633    struct dri_screen *psc = (struct dri_screen *) pdraw->psc;
 634    struct dri_drawable *pdp = (struct dri_drawable *) pdraw;
 635
 636    (*psc->core->destroyDrawable) (pdp->driDrawable);
 637    XF86DRIDestroyDrawable(psc->base.dpy, psc->base.scr, pdraw->drawable);
 638    free(pdraw);
 639 }
 640
 641 static __GLXDRIdrawable *
 642 driCreateDrawable(struct glx_screen *base,
 643                   XID xDrawable,
 644                   GLXDrawable drawable, struct glx_config *config_base)
 645 {
 646    drm_drawable_t hwDrawable;
 647    void *empty_attribute_list = NULL;
 648    __GLXDRIconfigPrivate *config = (__GLXDRIconfigPrivate *) config_base;
 649    struct dri_screen *psc = (struct dri_screen *) base;
 650    struct dri_drawable *pdp;
 651
 652    /* Old dri can't handle GLX 1.3+ drawable constructors. */
 653    if (xDrawable != drawable)
 654       return NULL;
 655
 656    pdp = malloc(sizeof *pdp);
 657    if (!pdp)
 658       return NULL;
 659
 660    memset(pdp, 0, sizeof *pdp);
 661    pdp->base.drawable = drawable;
 662    pdp->base.psc = &psc->base;
 663
 664    if (!XF86DRICreateDrawable(psc->base.dpy, psc->base.scr,
 665                               drawable, &hwDrawable)) {
 666       free(pdp);
 667       return NULL;
 668    }
 669
 670    /* Create a new drawable */
 671    pdp->driDrawable =
 672       (*psc->legacy->createNewDrawable) (psc->driScreen,
 673                                          config->driConfig,
 674                                          hwDrawable,
 675                                          GLX_WINDOW_BIT,
 676                                          empty_attribute_list, pdp);
 677
 678    if (!pdp->driDrawable) {
 679       XF86DRIDestroyDrawable(psc->base.dpy, psc->base.scr, drawable);
 680       free(pdp);
 681       return NULL;
 682    }
 683
 684    pdp->base.destroyDrawable = driDestroyDrawable;
 685
 686    return &pdp->base;
 687 }
 688
 689 static int64_t
 690 driSwapBuffers(__GLXDRIdrawable * pdraw, int64_t unused1, int64_t unused2,
 691                int64_t unused3)
 692 {
 693    struct dri_screen *psc = (struct dri_screen *) pdraw->psc;
 694    struct dri_drawable *pdp = (struct dri_drawable *) pdraw;
 695
 696    (*psc->core->swapBuffers) (pdp->driDrawable);
 697    return 0;
 698 }
 699
 700 static void
 701 driCopySubBuffer(__GLXDRIdrawable * pdraw,
 702                  int x, int y, int width, int height)
 703 {
 704    struct dri_drawable *pdp = (struct dri_drawable *) pdraw;
 705    struct dri_screen *psc = (struct dri_screen *) pdp->base.psc;
 706
 707    (*psc->driCopySubBuffer->copySubBuffer) (pdp->driDrawable,
 708                                             x, y, width, height);
 709 }
 710
 711 static void
 712 driDestroyScreen(struct glx_screen *base)
 713 {
 714    struct dri_screen *psc = (struct dri_screen *) base;
 715
 716    /* Free the direct rendering per screen data */
 717    if (psc->driScreen)
 718       (*psc->core->destroyScreen) (psc->driScreen);
 719    driDestroyConfigs(psc->driver_configs);
 720    psc->driScreen = NULL;
 721    if (psc->driver)
 722       dlclose(psc->driver);
 723 }
 724
 725 #ifdef __DRI_SWAP_BUFFER_COUNTER
 726
 727 static int
 728 driDrawableGetMSC(struct glx_screen *base, __GLXDRIdrawable *pdraw,
 729                    int64_t *ust, int64_t *msc, int64_t *sbc)
 730 {
 731    struct dri_screen *psc = (struct dri_screen *) base;
 732    struct dri_drawable *pdp = (struct dri_drawable *) pdraw;
 733
 734    if (pdp && psc->sbc && psc->msc)
 735       return ( (*psc->msc->getMSC)(psc->driScreen, msc) == 0 &&
 736                (*psc->sbc->getSBC)(pdp->driDrawable, sbc) == 0 &&
 737                __glXGetUST(ust) == 0 );
 738 }
 739
 740 static int
 741 driWaitForMSC(__GLXDRIdrawable *pdraw, int64_t target_msc, int64_t divisor,
 742                int64_t remainder, int64_t *ust, int64_t *msc, int64_t *sbc)
 743 {
 744    struct dri_screen *psc = (struct dri_screen *) pdraw->psc;
 745    struct dri_drawable *pdp = (struct dri_drawable *) pdraw;
 746
 747    if (pdp != NULL && psc->msc != NULL) {
 748       ret = (*psc->msc->waitForMSC) (pdp->driDrawable, target_msc,
 749                                      divisor, remainder, msc, sbc);
 750
 751       /* __glXGetUST returns zero on success and non-zero on failure.
 752        * This function returns True on success and False on failure.
 753        */
 754       return ret == 0 && __glXGetUST(ust) == 0;
 755    }
 756 }
 757
 758 static int
 759 driWaitForSBC(__GLXDRIdrawable *pdraw, int64_t target_sbc, int64_t *ust,
 760                int64_t *msc, int64_t *sbc)
 761 {
 762    struct dri_drawable *pdp = (struct dri_drawable *) pdraw;
 763
 764    if (pdp != NULL && psc->sbc != NULL) {
 765       ret =
 766          (*psc->sbc->waitForSBC) (pdp->driDrawable, target_sbc, msc, sbc);
 767
 768       /* __glXGetUST returns zero on success and non-zero on failure.
 769        * This function returns True on success and False on failure.
 770        */
 771       return ((ret == 0) && (__glXGetUST(ust) == 0));
 772    }
 773
 774    return DRI2WaitSBC(pdp->base.psc->dpy,
 775                       pdp->base.xDrawable, target_sbc, ust, msc, sbc);
 776 }
 777
 778 #endif
 779
 780 static int
 781 driSetSwapInterval(__GLXDRIdrawable *pdraw, int interval)
 782 {
 783    struct dri_drawable *pdp = (struct dri_drawable *) pdraw;
 784    struct dri_screen *psc = (struct dri_screen *) pdraw->psc;
 785
 786    if (psc->swapControl != NULL && pdraw != NULL) {
 787       psc->swapControl->setSwapInterval(pdp->driDrawable, interval);
 788       return 0;
 789    }
 790
 791    return GLX_BAD_CONTEXT;
 792 }
 793
 794 static int
 795 driGetSwapInterval(__GLXDRIdrawable *pdraw)
 796 {
 797    struct dri_drawable *pdp = (struct dri_drawable *) pdraw;
 798    struct dri_screen *psc = (struct dri_screen *) pdraw->psc;
 799
 800    if (psc->swapControl != NULL && pdraw != NULL)
 801       return psc->swapControl->getSwapInterval(pdp->driDrawable);
 802
 803    return 0;
 804 }
 805
 806 /* Bind DRI1 specific extensions */
 807 static void
 808 driBindExtensions(struct dri_screen *psc, const __DRIextension **extensions)
 809 {
 810    int i;
 811
 812    for (i = 0; extensions[i]; i++) {
 813       /* No DRI2 support for swap_control at the moment, since SwapBuffers
 814        * is done by the X server */
 815       if (strcmp(extensions[i]->name, __DRI_SWAP_CONTROL) == 0) {
 816          psc->swapControl = (__DRIswapControlExtension *) extensions[i];
 817          __glXEnableDirectExtension(&psc->base, "GLX_SGI_swap_control");
 818          __glXEnableDirectExtension(&psc->base, "GLX_MESA_swap_control");
 819       }
 820
 821       if (strcmp(extensions[i]->name, __DRI_MEDIA_STREAM_COUNTER) == 0) {
 822          psc->msc = (__DRImediaStreamCounterExtension *) extensions[i];
 823          __glXEnableDirectExtension(&psc->base, "GLX_SGI_video_sync");
 824       }
 825
 826       if (strcmp(extensions[i]->name, __DRI_COPY_SUB_BUFFER) == 0) {
 827          psc->driCopySubBuffer = (__DRIcopySubBufferExtension *) extensions[i];
 828          __glXEnableDirectExtension(&psc->base, "GLX_MESA_copy_sub_buffer");
 829       }
 830
 831       if (strcmp(extensions[i]->name, __DRI_READ_DRAWABLE) == 0) {
 832          __glXEnableDirectExtension(&psc->base, "GLX_SGI_make_current_read");
 833       }
 834       /* Ignore unknown extensions */
 835    }
 836 }
 837
 838 static const struct glx_screen_vtable dri_screen_vtable = {
 839    dri_create_context,
 840    NULL
 841 };
 842
 843 static struct glx_screen *
 844 driCreateScreen(int screen, struct glx_display *priv)
 845 {
 846    struct dri_display *pdp;
 847    __GLXDRIscreen *psp;
 848    const __DRIextension **extensions;
 849    struct dri_screen *psc;
 850    char *driverName;
 851    int i;
 852
 853    psc = calloc(1, sizeof *psc);
 854    if (psc == NULL)
 855       return NULL;
 856
 857    memset(psc, 0, sizeof *psc);
 858    if (!glx_screen_init(&psc->base, screen, priv)) {
 859       free(psc);
 860       return NULL;
 861    }
 862
 863    if (!driGetDriverName(priv->dpy, screen, &driverName)) {
 864       goto cleanup;
 865    }
 866
 867    psc->driver = driOpenDriver(driverName);
 868    free(driverName);
 869    if (psc->driver == NULL)
 870       goto cleanup;
 871
 872    extensions = dlsym(psc->driver, __DRI_DRIVER_EXTENSIONS);
 873    if (extensions == NULL) {
 874       ErrorMessageF("driver exports no extensions (%s)\n", dlerror());
 875       goto cleanup;
 876    }
 877
 878    for (i = 0; extensions[i]; i++) {
 879       if (strcmp(extensions[i]->name, __DRI_CORE) == 0)
 880          psc->core = (__DRIcoreExtension *) extensions[i];
 881       if (strcmp(extensions[i]->name, __DRI_LEGACY) == 0)
 882          psc->legacy = (__DRIlegacyExtension *) extensions[i];
 883    }
 884
 885    if (psc->core == NULL || psc->legacy == NULL)
 886       goto cleanup;
 887
 888    pdp = (struct dri_display *) priv->driDisplay;
 889    psc->driScreen =
 890       CallCreateNewScreen(psc->base.dpy, screen, psc, pdp);
 891    if (psc->driScreen == NULL)
 892       goto cleanup;
 893
 894    extensions = psc->core->getExtensions(psc->driScreen);
 895    driBindExtensions(psc, extensions);
 896
 897    psc->base.vtable = &dri_screen_vtable;
 898    psp = &psc->vtable;
 899    psc->base.driScreen = psp;
 900    if (psc->driCopySubBuffer)
 901       psp->copySubBuffer = driCopySubBuffer;
 902
 903    psp->destroyScreen = driDestroyScreen;
 904    psp->createDrawable = driCreateDrawable;
 905    psp->swapBuffers = driSwapBuffers;
 906
 907 #ifdef __DRI_SWAP_BUFFER_COUNTER
 908    psp->getDrawableMSC = driDrawableGetMSC;
 909    psp->waitForMSC = driWaitForMSC;
 910    psp->waitForSBC = driWaitForSBC;
 911 #endif
 912
 913    psp->setSwapInterval = driSetSwapInterval;
 914    psp->getSwapInterval = driGetSwapInterval;
 915
 916    return &psc->base;
 917
 918 cleanup:
 919    CriticalErrorMessageF("failed to load driver: %s\n", driverName);
 920
 921    if (psc->driver)
 922       dlclose(psc->driver);
 923    glx_screen_cleanup(&psc->base);
 924    free(psc);
 925
 926    return NULL;
 927 }
 928
 929 /* Called from __glXFreeDisplayPrivate.
 930  */
 931 static void
 932 driDestroyDisplay(__GLXDRIdisplay * dpy)
 933 {
 934    free(dpy);
 935 }
 936
 937 /*
 938  * Allocate, initialize and return a __DRIdisplayPrivate object.
 939  * This is called from __glXInitialize() when we are given a new
 940  * display pointer.
 941  */
 942 _X_HIDDEN __GLXDRIdisplay *
 943 driCreateDisplay(Display * dpy)
 944 {
 945    struct dri_display *pdpyp;
 946    int eventBase, errorBase;
 947    int major, minor, patch;
 948
 949    if (!XF86DRIQueryExtension(dpy, &eventBase, &errorBase)) {
 950       return NULL;
 951    }
 952
 953    if (!XF86DRIQueryVersion(dpy, &major, &minor, &patch)) {
 954       return NULL;
 955    }
 956
 957    pdpyp = malloc(sizeof *pdpyp);
 958    if (!pdpyp) {
 959       return NULL;
 960    }
 961
 962    pdpyp->driMajor = major;
 963    pdpyp->driMinor = minor;
 964    pdpyp->driPatch = patch;
 965
 966    pdpyp->base.destroyDisplay = driDestroyDisplay;
 967    pdpyp->base.createScreen = driCreateScreen;
 968
 969    return &pdpyp->base;
 970 }
 971
 972 #endif /* GLX_DIRECT_RENDERING */