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. "r128", "tdfx", 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          Xfree(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       Xfree(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;
 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    Xfree(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 "tdfx") 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    Xfree(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    psc->base.configs =
 450       driConvertConfigs(psc->core, psc->base.configs, driver_configs);
 451    psc->base.visuals =
 452       driConvertConfigs(psc->core, psc->base.visuals, driver_configs);
 453
 454    psc->driver_configs = driver_configs;
 455
 456    /* Visuals with depth != screen depth are subject to automatic compositing
 457     * in the X server, so DRI1 can't render to them properly. Mark them as
 458     * non-conformant to prevent apps from picking them up accidentally.
 459     */
 460    for (visual = psc->base.visuals; visual; visual = visual->next) {
 461       XVisualInfo template;
 462       XVisualInfo *visuals;
 463       int num_visuals;
 464       long mask;
 465
 466       template.visualid = visual->visualID;
 467       mask = VisualIDMask;
 468       visuals = XGetVisualInfo(dpy, mask, &template, &num_visuals);
 469
 470       if (visuals) {
 471          if (num_visuals > 0 && visuals->depth != DefaultDepth(dpy, scrn))
 472             visual->visualRating = GLX_NON_CONFORMANT_CONFIG;
 473
 474          XFree(visuals);
 475       }
 476    }
 477
 478    return psp;
 479
 480  handle_error:
 481    if (pSAREA != MAP_FAILED)
 482       drmUnmap(pSAREA, SAREA_MAX);
 483
 484    if (framebuffer.base != MAP_FAILED)
 485       drmUnmap((drmAddress) framebuffer.base, framebuffer.size);
 486
 487    if (framebuffer.dev_priv != NULL)
 488       Xfree(framebuffer.dev_priv);
 489
 490    if (fd >= 0)
 491       drmCloseOnce(fd);
 492
 493    XF86DRICloseConnection(dpy, scrn);
 494
 495    ErrorMessageF("reverting to software direct rendering\n");
 496
 497    return NULL;
 498 }
 499
 500 static void
 501 dri_destroy_context(struct glx_context * context)
 502 {
 503    struct dri_context *pcp = (struct dri_context *) context;
 504    struct dri_screen *psc = (struct dri_screen *) context->psc;
 505
 506    driReleaseDrawables(&pcp->base);
 507
 508    if (context->xid)
 509       glx_send_destroy_context(psc->base.dpy, context->xid);
 510
 511    if (context->extensions)
 512       XFree((char *) context->extensions);
 513
 514    (*psc->core->destroyContext) (pcp->driContext);
 515
 516    XF86DRIDestroyContext(psc->base.dpy, psc->base.scr, pcp->hwContextID);
 517    Xfree(pcp);
 518 }
 519
 520 static int
 521 dri_bind_context(struct glx_context *context, struct glx_context *old,
 522                  GLXDrawable draw, GLXDrawable read)
 523 {
 524    struct dri_context *pcp = (struct dri_context *) context;
 525    struct dri_screen *psc = (struct dri_screen *) pcp->base.psc;
 526    struct dri_drawable *pdraw, *pread;
 527
 528    pdraw = (struct dri_drawable *) driFetchDrawable(context, draw);
 529    pread = (struct dri_drawable *) driFetchDrawable(context, read);
 530
 531    driReleaseDrawables(&pcp->base);
 532
 533    if (pdraw == NULL || pread == NULL)
 534       return GLXBadDrawable;
 535
 536    if ((*psc->core->bindContext) (pcp->driContext,
 537                                   pdraw->driDrawable, pread->driDrawable))
 538       return Success;
 539
 540    return GLXBadContext;
 541 }
 542
 543 static void
 544 dri_unbind_context(struct glx_context *context, struct glx_context *new)
 545 {
 546    struct dri_context *pcp = (struct dri_context *) context;
 547    struct dri_screen *psc = (struct dri_screen *) pcp->base.psc;
 548
 549    (*psc->core->unbindContext) (pcp->driContext);
 550 }
 551
 552 static const struct glx_context_vtable dri_context_vtable = {
 553    dri_destroy_context,
 554    dri_bind_context,
 555    dri_unbind_context,
 556    NULL,
 557    NULL,
 558    DRI_glXUseXFont,
 559    NULL,
 560    NULL,
 561 };
 562
 563 static struct glx_context *
 564 dri_create_context(struct glx_screen *base,
 565                    struct glx_config *config_base,
 566                    struct glx_context *shareList, int renderType)
 567 {
 568    struct dri_context *pcp, *pcp_shared;
 569    struct dri_screen *psc = (struct dri_screen *) base;
 570    drm_context_t hwContext;
 571    __DRIcontext *shared = NULL;
 572    __GLXDRIconfigPrivate *config = (__GLXDRIconfigPrivate *) config_base;
 573
 574    if (!psc->base.driScreen)
 575       return NULL;
 576
 577    if (shareList) {
 578       pcp_shared = (struct dri_context *) shareList;
 579       shared = pcp_shared->driContext;
 580    }
 581
 582    pcp = Xmalloc(sizeof *pcp);
 583    if (pcp == NULL)
 584       return NULL;
 585
 586    memset(pcp, 0, sizeof *pcp);
 587    if (!glx_context_init(&pcp->base, &psc->base, &config->base)) {
 588       Xfree(pcp);
 589       return NULL;
 590    }
 591
 592    if (!XF86DRICreateContextWithConfig(psc->base.dpy, psc->base.scr,
 593                                        config->base.visualID,
 594                                        &pcp->hwContextID, &hwContext)) {
 595       Xfree(pcp);
 596       return NULL;
 597    }
 598
 599    pcp->driContext =
 600       (*psc->legacy->createNewContext) (psc->driScreen,
 601                                         config->driConfig,
 602                                         renderType, shared, hwContext, pcp);
 603    if (pcp->driContext == NULL) {
 604       XF86DRIDestroyContext(psc->base.dpy, psc->base.scr, pcp->hwContextID);
 605       Xfree(pcp);
 606       return NULL;
 607    }
 608
 609    pcp->base.vtable = &dri_context_vtable;
 610
 611    return &pcp->base;
 612 }
 613
 614 static void
 615 driDestroyDrawable(__GLXDRIdrawable * pdraw)
 616 {
 617    struct dri_screen *psc = (struct dri_screen *) pdraw->psc;
 618    struct dri_drawable *pdp = (struct dri_drawable *) pdraw;
 619
 620    (*psc->core->destroyDrawable) (pdp->driDrawable);
 621    XF86DRIDestroyDrawable(psc->base.dpy, psc->base.scr, pdraw->drawable);
 622    Xfree(pdraw);
 623 }
 624
 625 static __GLXDRIdrawable *
 626 driCreateDrawable(struct glx_screen *base,
 627                   XID xDrawable,
 628                   GLXDrawable drawable, struct glx_config *config_base)
 629 {
 630    drm_drawable_t hwDrawable;
 631    void *empty_attribute_list = NULL;
 632    __GLXDRIconfigPrivate *config = (__GLXDRIconfigPrivate *) config_base;
 633    struct dri_screen *psc = (struct dri_screen *) base;
 634    struct dri_drawable *pdp;
 635
 636    /* Old dri can't handle GLX 1.3+ drawable constructors. */
 637    if (xDrawable != drawable)
 638       return NULL;
 639
 640    pdp = Xmalloc(sizeof *pdp);
 641    if (!pdp)
 642       return NULL;
 643
 644    memset(pdp, 0, sizeof *pdp);
 645    pdp->base.drawable = drawable;
 646    pdp->base.psc = &psc->base;
 647
 648    if (!XF86DRICreateDrawable(psc->base.dpy, psc->base.scr,
 649                               drawable, &hwDrawable)) {
 650       Xfree(pdp);
 651       return NULL;
 652    }
 653
 654    /* Create a new drawable */
 655    pdp->driDrawable =
 656       (*psc->legacy->createNewDrawable) (psc->driScreen,
 657                                          config->driConfig,
 658                                          hwDrawable,
 659                                          GLX_WINDOW_BIT,
 660                                          empty_attribute_list, pdp);
 661
 662    if (!pdp->driDrawable) {
 663       XF86DRIDestroyDrawable(psc->base.dpy, psc->base.scr, drawable);
 664       Xfree(pdp);
 665       return NULL;
 666    }
 667
 668    pdp->base.destroyDrawable = driDestroyDrawable;
 669
 670    return &pdp->base;
 671 }
 672
 673 static int64_t
 674 driSwapBuffers(__GLXDRIdrawable * pdraw, int64_t unused1, int64_t unused2,
 675                int64_t unused3)
 676 {
 677    struct dri_screen *psc = (struct dri_screen *) pdraw->psc;
 678    struct dri_drawable *pdp = (struct dri_drawable *) pdraw;
 679
 680    (*psc->core->swapBuffers) (pdp->driDrawable);
 681    return 0;
 682 }
 683
 684 static void
 685 driCopySubBuffer(__GLXDRIdrawable * pdraw,
 686                  int x, int y, int width, int height)
 687 {
 688    struct dri_drawable *pdp = (struct dri_drawable *) pdraw;
 689    struct dri_screen *psc = (struct dri_screen *) pdp->base.psc;
 690
 691    (*psc->driCopySubBuffer->copySubBuffer) (pdp->driDrawable,
 692                                             x, y, width, height);
 693 }
 694
 695 static void
 696 driDestroyScreen(struct glx_screen *base)
 697 {
 698    struct dri_screen *psc = (struct dri_screen *) base;
 699
 700    /* Free the direct rendering per screen data */
 701    if (psc->driScreen)
 702       (*psc->core->destroyScreen) (psc->driScreen);
 703    driDestroyConfigs(psc->driver_configs);
 704    psc->driScreen = NULL;
 705    if (psc->driver)
 706       dlclose(psc->driver);
 707 }
 708
 709 #ifdef __DRI_SWAP_BUFFER_COUNTER
 710
 711 static int
 712 driDrawableGetMSC(struct glx_screen *base, __GLXDRIdrawable *pdraw,
 713                    int64_t *ust, int64_t *msc, int64_t *sbc)
 714 {
 715    struct dri_screen *psc = (struct dri_screen *) base;
 716    struct dri_drawable *pdp = (struct dri_drawable *) pdraw;
 717
 718    if (pdp && psc->sbc && psc->msc)
 719       return ( (*psc->msc->getMSC)(psc->driScreen, msc) == 0 &&
 720                (*psc->sbc->getSBC)(pdp->driDrawable, sbc) == 0 &&
 721                __glXGetUST(ust) == 0 );
 722 }
 723
 724 static int
 725 driWaitForMSC(__GLXDRIdrawable *pdraw, int64_t target_msc, int64_t divisor,
 726                int64_t remainder, int64_t *ust, int64_t *msc, int64_t *sbc)
 727 {
 728    struct dri_screen *psc = (struct dri_screen *) pdraw->psc;
 729    struct dri_drawable *pdp = (struct dri_drawable *) pdraw;
 730
 731    if (pdp != NULL && psc->msc != NULL) {
 732       ret = (*psc->msc->waitForMSC) (pdp->driDrawable, target_msc,
 733                                      divisor, remainder, msc, sbc);
 734
 735       /* __glXGetUST returns zero on success and non-zero on failure.
 736        * This function returns True on success and False on failure.
 737        */
 738       return ret == 0 && __glXGetUST(ust) == 0;
 739    }
 740 }
 741
 742 static int
 743 driWaitForSBC(__GLXDRIdrawable *pdraw, int64_t target_sbc, int64_t *ust,
 744                int64_t *msc, int64_t *sbc)
 745 {
 746    struct dri_drawable *pdp = (struct dri_drawable *) pdraw;
 747
 748    if (pdp != NULL && psc->sbc != NULL) {
 749       ret =
 750          (*psc->sbc->waitForSBC) (pdp->driDrawable, target_sbc, msc, sbc);
 751
 752       /* __glXGetUST returns zero on success and non-zero on failure.
 753        * This function returns True on success and False on failure.
 754        */
 755       return ((ret == 0) && (__glXGetUST(ust) == 0));
 756    }
 757
 758    return DRI2WaitSBC(pdp->base.psc->dpy,
 759                       pdp->base.xDrawable, target_sbc, ust, msc, sbc);
 760 }
 761
 762 #endif
 763
 764 static int
 765 driSetSwapInterval(__GLXDRIdrawable *pdraw, int interval)
 766 {
 767    struct dri_drawable *pdp = (struct dri_drawable *) pdraw;
 768    struct dri_screen *psc = (struct dri_screen *) pdraw->psc;
 769
 770    if (psc->swapControl != NULL && pdraw != NULL) {
 771       psc->swapControl->setSwapInterval(pdp->driDrawable, interval);
 772       return 0;
 773    }
 774
 775    return GLX_BAD_CONTEXT;
 776 }
 777
 778 static int
 779 driGetSwapInterval(__GLXDRIdrawable *pdraw)
 780 {
 781    struct dri_drawable *pdp = (struct dri_drawable *) pdraw;
 782    struct dri_screen *psc = (struct dri_screen *) pdraw->psc;
 783
 784    if (psc->swapControl != NULL && pdraw != NULL)
 785       return psc->swapControl->getSwapInterval(pdp->driDrawable);
 786
 787    return 0;
 788 }
 789
 790 /* Bind DRI1 specific extensions */
 791 static void
 792 driBindExtensions(struct dri_screen *psc, const __DRIextension **extensions)
 793 {
 794    int i;
 795
 796    for (i = 0; extensions[i]; i++) {
 797       /* No DRI2 support for swap_control at the moment, since SwapBuffers
 798        * is done by the X server */
 799       if (strcmp(extensions[i]->name, __DRI_SWAP_CONTROL) == 0) {
 800          psc->swapControl = (__DRIswapControlExtension *) extensions[i];
 801          __glXEnableDirectExtension(&psc->base, "GLX_SGI_swap_control");
 802          __glXEnableDirectExtension(&psc->base, "GLX_MESA_swap_control");
 803       }
 804
 805       if (strcmp(extensions[i]->name, __DRI_MEDIA_STREAM_COUNTER) == 0) {
 806          psc->msc = (__DRImediaStreamCounterExtension *) extensions[i];
 807          __glXEnableDirectExtension(&psc->base, "GLX_SGI_video_sync");
 808       }
 809
 810       if (strcmp(extensions[i]->name, __DRI_COPY_SUB_BUFFER) == 0) {
 811          psc->driCopySubBuffer = (__DRIcopySubBufferExtension *) extensions[i];
 812          __glXEnableDirectExtension(&psc->base, "GLX_MESA_copy_sub_buffer");
 813       }
 814
 815       if (strcmp(extensions[i]->name, __DRI_READ_DRAWABLE) == 0) {
 816          __glXEnableDirectExtension(&psc->base, "GLX_SGI_make_current_read");
 817       }
 818       /* Ignore unknown extensions */
 819    }
 820 }
 821
 822 static const struct glx_screen_vtable dri_screen_vtable = {
 823    dri_create_context
 824 };
 825
 826 static struct glx_screen *
 827 driCreateScreen(int screen, struct glx_display *priv)
 828 {
 829    struct dri_display *pdp;
 830    __GLXDRIscreen *psp;
 831    const __DRIextension **extensions;
 832    struct dri_screen *psc;
 833    char *driverName;
 834    int i;
 835
 836    psc = Xcalloc(1, sizeof *psc);
 837    if (psc == NULL)
 838       return NULL;
 839
 840    memset(psc, 0, sizeof *psc);
 841    if (!glx_screen_init(&psc->base, screen, priv)) {
 842       Xfree(psc);
 843       return NULL;
 844    }
 845
 846    if (!driGetDriverName(priv->dpy, screen, &driverName)) {
 847       goto cleanup;
 848    }
 849
 850    psc->driver = driOpenDriver(driverName);
 851    Xfree(driverName);
 852    if (psc->driver == NULL)
 853       goto cleanup;
 854
 855    extensions = dlsym(psc->driver, __DRI_DRIVER_EXTENSIONS);
 856    if (extensions == NULL) {
 857       ErrorMessageF("driver exports no extensions (%s)\n", dlerror());
 858       goto cleanup;
 859    }
 860
 861    for (i = 0; extensions[i]; i++) {
 862       if (strcmp(extensions[i]->name, __DRI_CORE) == 0)
 863          psc->core = (__DRIcoreExtension *) extensions[i];
 864       if (strcmp(extensions[i]->name, __DRI_LEGACY) == 0)
 865          psc->legacy = (__DRIlegacyExtension *) extensions[i];
 866    }
 867
 868    if (psc->core == NULL || psc->legacy == NULL)
 869       goto cleanup;
 870
 871    pdp = (struct dri_display *) priv->driDisplay;
 872    psc->driScreen =
 873       CallCreateNewScreen(psc->base.dpy, screen, psc, pdp);
 874    if (psc->driScreen == NULL)
 875       goto cleanup;
 876
 877    extensions = psc->core->getExtensions(psc->driScreen);
 878    driBindExtensions(psc, extensions);
 879
 880    psc->base.vtable = &dri_screen_vtable;
 881    psp = &psc->vtable;
 882    psc->base.driScreen = psp;
 883    if (psc->driCopySubBuffer)
 884       psp->copySubBuffer = driCopySubBuffer;
 885
 886    psp->destroyScreen = driDestroyScreen;
 887    psp->createDrawable = driCreateDrawable;
 888    psp->swapBuffers = driSwapBuffers;
 889
 890 #ifdef __DRI_SWAP_BUFFER_COUNTER
 891    psp->getDrawableMSC = driDrawableGetMSC;
 892    psp->waitForMSC = driWaitForMSC;
 893    psp->waitForSBC = driWaitForSBC;
 894 #endif
 895
 896    psp->setSwapInterval = driSetSwapInterval;
 897    psp->getSwapInterval = driGetSwapInterval;
 898
 899    return &psc->base;
 900
 901 cleanup:
 902    if (psc->driver)
 903       dlclose(psc->driver);
 904    glx_screen_cleanup(&psc->base);
 905    Xfree(psc);
 906
 907    return NULL;
 908 }
 909
 910 /* Called from __glXFreeDisplayPrivate.
 911  */
 912 static void
 913 driDestroyDisplay(__GLXDRIdisplay * dpy)
 914 {
 915    Xfree(dpy);
 916 }
 917
 918 /*
 919  * Allocate, initialize and return a __DRIdisplayPrivate object.
 920  * This is called from __glXInitialize() when we are given a new
 921  * display pointer.
 922  */
 923 _X_HIDDEN __GLXDRIdisplay *
 924 driCreateDisplay(Display * dpy)
 925 {
 926    struct dri_display *pdpyp;
 927    int eventBase, errorBase;
 928    int major, minor, patch;
 929
 930    if (!XF86DRIQueryExtension(dpy, &eventBase, &errorBase)) {
 931       return NULL;
 932    }
 933
 934    if (!XF86DRIQueryVersion(dpy, &major, &minor, &patch)) {
 935       return NULL;
 936    }
 937
 938    pdpyp = Xmalloc(sizeof *pdpyp);
 939    if (!pdpyp) {
 940       return NULL;
 941    }
 942
 943    pdpyp->driMajor = major;
 944    pdpyp->driMinor = minor;
 945    pdpyp->driPatch = patch;
 946
 947    pdpyp->base.destroyDisplay = driDestroyDisplay;
 948    pdpyp->base.createScreen = driCreateScreen;
 949
 950    return &pdpyp->base;
 951 }
 952
 953 #endif /* GLX_DIRECT_RENDERING */