src/glx/drisw_glx.c

   1 /*
   2  * Copyright 2008 George Sapountzis
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice (including the next
  12  * paragraph) shall be included in all copies or substantial portions of the
  13  * Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  20  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  21  * SOFTWARE.
  22  */
  23
  24 #if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
  25
  26 #include <X11/Xlib.h>
  27 #include "glxclient.h"
  28 #include <dlfcn.h>
  29 #include "dri_common.h"
  30
  31 struct drisw_display
  32 {
  33    __GLXDRIdisplay base;
  34 };
  35
  36 struct drisw_context
  37 {
  38    struct glx_context base;
  39    __DRIcontext *driContext;
  40
  41 };
  42
  43 struct drisw_screen
  44 {
  45    struct glx_screen base;
  46
  47    __DRIscreen *driScreen;
  48    __GLXDRIscreen vtable;
  49    const __DRIcoreExtension *core;
  50    const __DRIswrastExtension *swrast;
  51    const __DRItexBufferExtension *texBuffer;
  52
  53    const __DRIconfig **driver_configs;
  54
  55    void *driver;
  56 };
  57
  58 struct drisw_drawable
  59 {
  60    __GLXDRIdrawable base;
  61
  62    GC gc;
  63    GC swapgc;
  64
  65    __DRIdrawable *driDrawable;
  66    XVisualInfo *visinfo;
  67    XImage *ximage;
  68 };
  69
  70 static Bool
  71 XCreateDrawable(struct drisw_drawable * pdp,
  72                 Display * dpy, XID drawable, int visualid)
  73 {
  74    XGCValues gcvalues;
  75    long visMask;
  76    XVisualInfo visTemp;
  77    int num_visuals;
  78
  79    /* create GC's */
  80    pdp->gc = XCreateGC(dpy, drawable, 0, NULL);
  81    pdp->swapgc = XCreateGC(dpy, drawable, 0, NULL);
  82
  83    gcvalues.function = GXcopy;
  84    gcvalues.graphics_exposures = False;
  85    XChangeGC(dpy, pdp->gc, GCFunction, &gcvalues);
  86    XChangeGC(dpy, pdp->swapgc, GCFunction, &gcvalues);
  87    XChangeGC(dpy, pdp->swapgc, GCGraphicsExposures, &gcvalues);
  88
  89    /* visual */
  90    visTemp.visualid = visualid;
  91    visMask = VisualIDMask;
  92    pdp->visinfo = XGetVisualInfo(dpy, visMask, &visTemp, &num_visuals);
  93
  94    /* create XImage */
  95    pdp->ximage = XCreateImage(dpy,
  96                               pdp->visinfo->visual,
  97                               pdp->visinfo->depth,
  98                               ZPixmap, 0,             /* format, offset */
  99                               NULL,                   /* data */
 100                               0, 0,                   /* width, height */
 101                               32,                     /* bitmap_pad */
 102                               0);                     /* bytes_per_line */
 103
 104   /**
 105    * swrast does not handle 24-bit depth with 24 bpp, so let X do the
 106    * the conversion for us.
 107    */
 108   if (pdp->ximage->bits_per_pixel == 24)
 109      pdp->ximage->bits_per_pixel = 32;
 110
 111    return True;
 112 }
 113
 114 static void
 115 XDestroyDrawable(struct drisw_drawable * pdp, Display * dpy, XID drawable)
 116 {
 117    XDestroyImage(pdp->ximage);
 118    XFree(pdp->visinfo);
 119
 120    XFreeGC(dpy, pdp->gc);
 121    XFreeGC(dpy, pdp->swapgc);
 122 }
 123
 124 /**
 125  * swrast loader functions
 126  */
 127
 128 static void
 129 swrastGetDrawableInfo(__DRIdrawable * draw,
 130                       int *x, int *y, int *w, int *h,
 131                       void *loaderPrivate)
 132 {
 133    struct drisw_drawable *pdp = loaderPrivate;
 134    __GLXDRIdrawable *pdraw = &(pdp->base);
 135    Display *dpy = pdraw->psc->dpy;
 136    Drawable drawable;
 137
 138    Window root;
 139    unsigned uw, uh, bw, depth;
 140
 141    drawable = pdraw->xDrawable;
 142
 143    XGetGeometry(dpy, drawable, &root, x, y, &uw, &uh, &bw, &depth);
 144    *w = uw;
 145    *h = uh;
 146 }
 147
 148 /**
 149  * Align renderbuffer pitch.
 150  *
 151  * This should be chosen by the driver and the loader (libGL, xserver/glx)
 152  * should use the driver provided pitch.
 153  *
 154  * It seems that the xorg loader (that is the xserver loading swrast_dri for
 155  * indirect rendering, not client-side libGL) requires that the pitch is
 156  * exactly the image width padded to 32 bits. XXX
 157  *
 158  * The above restriction can probably be overcome by using ScratchPixmap and
 159  * CopyArea in the xserver, similar to ShmPutImage, and setting the width of
 160  * the scratch pixmap to 'pitch / cpp'.
 161  */
 162 static inline int
 163 bytes_per_line(unsigned pitch_bits, unsigned mul)
 164 {
 165    unsigned mask = mul - 1;
 166
 167    return ((pitch_bits + mask) & ~mask) / 8;
 168 }
 169
 170 static void
 171 swrastPutImage(__DRIdrawable * draw, int op,
 172                int x, int y, int w, int h,
 173                char *data, void *loaderPrivate)
 174 {
 175    struct drisw_drawable *pdp = loaderPrivate;
 176    __GLXDRIdrawable *pdraw = &(pdp->base);
 177    Display *dpy = pdraw->psc->dpy;
 178    Drawable drawable;
 179    XImage *ximage;
 180    GC gc;
 181
 182    switch (op) {
 183    case __DRI_SWRAST_IMAGE_OP_DRAW:
 184       gc = pdp->gc;
 185       break;
 186    case __DRI_SWRAST_IMAGE_OP_SWAP:
 187       gc = pdp->swapgc;
 188       break;
 189    default:
 190       return;
 191    }
 192
 193    drawable = pdraw->xDrawable;
 194
 195    ximage = pdp->ximage;
 196    ximage->data = data;
 197    ximage->width = w;
 198    ximage->height = h;
 199    ximage->bytes_per_line = bytes_per_line(w * ximage->bits_per_pixel, 32);
 200
 201    XPutImage(dpy, drawable, gc, ximage, 0, 0, x, y, w, h);
 202
 203    ximage->data = NULL;
 204 }
 205
 206 static void
 207 swrastGetImage(__DRIdrawable * read,
 208                int x, int y, int w, int h,
 209                char *data, void *loaderPrivate)
 210 {
 211    struct drisw_drawable *prp = loaderPrivate;
 212    __GLXDRIdrawable *pread = &(prp->base);
 213    Display *dpy = pread->psc->dpy;
 214    Drawable readable;
 215    XImage *ximage;
 216
 217    readable = pread->xDrawable;
 218
 219    ximage = prp->ximage;
 220    ximage->data = data;
 221    ximage->width = w;
 222    ximage->height = h;
 223    ximage->bytes_per_line = bytes_per_line(w * ximage->bits_per_pixel, 32);
 224
 225    XGetSubImage(dpy, readable, x, y, w, h, ~0L, ZPixmap, ximage, 0, 0);
 226
 227    ximage->data = NULL;
 228 }
 229
 230 static const __DRIswrastLoaderExtension swrastLoaderExtension = {
 231    {__DRI_SWRAST_LOADER, __DRI_SWRAST_LOADER_VERSION},
 232    swrastGetDrawableInfo,
 233    swrastPutImage,
 234    swrastGetImage
 235 };
 236
 237 static const __DRIextension *loader_extensions[] = {
 238    &systemTimeExtension.base,
 239    &swrastLoaderExtension.base,
 240    NULL
 241 };
 242
 243 /**
 244  * GLXDRI functions
 245  */
 246
 247 static void
 248 drisw_destroy_context(struct glx_context *context)
 249 {
 250    struct drisw_context *pcp = (struct drisw_context *) context;
 251    struct drisw_screen *psc = (struct drisw_screen *) context->psc;
 252
 253    driReleaseDrawables(&pcp->base);
 254
 255    if (context->extensions)
 256       XFree((char *) context->extensions);
 257
 258    (*psc->core->destroyContext) (pcp->driContext);
 259
 260    Xfree(pcp);
 261 }
 262
 263 static int
 264 drisw_bind_context(struct glx_context *context, struct glx_context *old,
 265                    GLXDrawable draw, GLXDrawable read)
 266 {
 267    struct drisw_context *pcp = (struct drisw_context *) context;
 268    struct drisw_screen *psc = (struct drisw_screen *) pcp->base.psc;
 269    struct drisw_drawable *pdraw, *pread;
 270
 271    pdraw = (struct drisw_drawable *) driFetchDrawable(context, draw);
 272    pread = (struct drisw_drawable *) driFetchDrawable(context, read);
 273
 274    driReleaseDrawables(&pcp->base);
 275
 276    if (pdraw == NULL || pread == NULL)
 277       return GLXBadDrawable;
 278
 279    if ((*psc->core->bindContext) (pcp->driContext,
 280                                   pdraw->driDrawable, pread->driDrawable))
 281       return Success;
 282
 283    return GLXBadContext;
 284 }
 285
 286 static void
 287 drisw_unbind_context(struct glx_context *context, struct glx_context *new)
 288 {
 289    struct drisw_context *pcp = (struct drisw_context *) context;
 290    struct drisw_screen *psc = (struct drisw_screen *) pcp->base.psc;
 291
 292    (*psc->core->unbindContext) (pcp->driContext);
 293 }
 294
 295 static void
 296 drisw_bind_tex_image(Display * dpy,
 297                     GLXDrawable drawable,
 298                     int buffer, const int *attrib_list)
 299 {
 300    struct glx_context *gc = __glXGetCurrentContext();
 301    struct drisw_context *pcp = (struct drisw_context *) gc;
 302    __GLXDRIdrawable *base = GetGLXDRIDrawable(dpy, drawable);
 303    struct drisw_drawable *pdraw = (struct drisw_drawable *) base;
 304    struct drisw_screen *psc;
 305
 306    __glXInitialize(dpy);
 307
 308    if (pdraw != NULL) {
 309       psc = (struct drisw_screen *) base->psc;
 310
 311       if (!psc->texBuffer)
 312          return;
 313
 314       if (psc->texBuffer->base.version >= 2 &&
 315         psc->texBuffer->setTexBuffer2 != NULL) {
 316               (*psc->texBuffer->setTexBuffer2) (pcp->driContext,
 317                                            pdraw->base.textureTarget,
 318                                            pdraw->base.textureFormat,
 319                                            pdraw->driDrawable);
 320       }
 321       else {
 322               (*psc->texBuffer->setTexBuffer) (pcp->driContext,
 323                                           pdraw->base.textureTarget,
 324                                           pdraw->driDrawable);
 325       }
 326    }
 327 }
 328
 329 static void
 330 drisw_release_tex_image(Display * dpy, GLXDrawable drawable, int buffer)
 331 {
 332 #if __DRI_TEX_BUFFER_VERSION >= 3
 333    struct glx_context *gc = __glXGetCurrentContext();
 334    struct dri2_context *pcp = (struct dri2_context *) gc;
 335    __GLXDRIdrawable *base = GetGLXDRIDrawable(dpy, drawable);
 336    struct glx_display *dpyPriv = __glXInitialize(dpy);
 337    struct dri2_drawable *pdraw = (struct dri2_drawable *) base;
 338    struct dri2_screen *psc;
 339
 340    if (pdraw != NULL) {
 341       psc = (struct dri2_screen *) base->psc;
 342
 343       if (!psc->texBuffer)
 344          return;
 345
 346       if (psc->texBuffer->base.version >= 3 &&
 347           psc->texBuffer->releaseTexBuffer != NULL) {
 348          (*psc->texBuffer->releaseTexBuffer) (pcp->driContext,
 349                                            pdraw->base.textureTarget,
 350                                            pdraw->driDrawable);
 351       }
 352    }
 353 #endif
 354 }
 355
 356 static const struct glx_context_vtable drisw_context_vtable = {
 357    drisw_destroy_context,
 358    drisw_bind_context,
 359    drisw_unbind_context,
 360    NULL,
 361    NULL,
 362    DRI_glXUseXFont,
 363    drisw_bind_tex_image,
 364    drisw_release_tex_image,
 365    NULL, /* get_proc_address */
 366 };
 367
 368 static struct glx_context *
 369 drisw_create_context(struct glx_screen *base,
 370                      struct glx_config *config_base,
 371                      struct glx_context *shareList, int renderType)
 372 {
 373    struct drisw_context *pcp, *pcp_shared;
 374    __GLXDRIconfigPrivate *config = (__GLXDRIconfigPrivate *) config_base;
 375    struct drisw_screen *psc = (struct drisw_screen *) base;
 376    __DRIcontext *shared = NULL;
 377
 378    if (!psc->base.driScreen)
 379       return NULL;
 380
 381    if (shareList) {
 382       /* If the shareList context is not a DRISW context, we cannot possibly
 383        * create a DRISW context that shares it.
 384        */
 385       if (shareList->vtable->destroy != drisw_destroy_context) {
 386          return NULL;
 387       }
 388
 389       pcp_shared = (struct drisw_context *) shareList;
 390       shared = pcp_shared->driContext;
 391    }
 392
 393    pcp = Xmalloc(sizeof *pcp);
 394    if (pcp == NULL)
 395       return NULL;
 396
 397    memset(pcp, 0, sizeof *pcp);
 398    if (!glx_context_init(&pcp->base, &psc->base, &config->base)) {
 399       Xfree(pcp);
 400       return NULL;
 401    }
 402
 403    pcp->driContext =
 404       (*psc->core->createNewContext) (psc->driScreen,
 405                                       config->driConfig, shared, pcp);
 406    if (pcp->driContext == NULL) {
 407       Xfree(pcp);
 408       return NULL;
 409    }
 410
 411    pcp->base.vtable = &drisw_context_vtable;
 412
 413    return &pcp->base;
 414 }
 415
 416 static struct glx_context *
 417 drisw_create_context_attribs(struct glx_screen *base,
 418                              struct glx_config *config_base,
 419                              struct glx_context *shareList,
 420                              unsigned num_attribs,
 421                              const uint32_t *attribs,
 422                              unsigned *error)
 423 {
 424    struct drisw_context *pcp, *pcp_shared;
 425    __GLXDRIconfigPrivate *config = (__GLXDRIconfigPrivate *) config_base;
 426    struct drisw_screen *psc = (struct drisw_screen *) base;
 427    __DRIcontext *shared = NULL;
 428
 429    uint32_t minor_ver = 1;
 430    uint32_t major_ver = 0;
 431    uint32_t flags = 0;
 432    unsigned api;
 433    uint32_t ctx_attribs[2 * 4];
 434    unsigned num_ctx_attribs = 0;
 435
 436    if (!psc->base.driScreen)
 437       return NULL;
 438
 439    if (psc->swrast->base.version < 3)
 440       return NULL;
 441
 442    /* Remap the GLX tokens to DRI2 tokens.
 443     */
 444    if (!dri2_convert_glx_attribs(num_attribs, attribs,
 445                                  &major_ver, &minor_ver, &flags, &api,
 446                                  error))
 447       return NULL;
 448
 449    if (shareList) {
 450       pcp_shared = (struct drisw_context *) shareList;
 451       shared = pcp_shared->driContext;
 452    }
 453
 454    pcp = Xmalloc(sizeof *pcp);
 455    if (pcp == NULL)
 456       return NULL;
 457
 458    memset(pcp, 0, sizeof *pcp);
 459    if (!glx_context_init(&pcp->base, &psc->base, &config->base)) {
 460       Xfree(pcp);
 461       return NULL;
 462    }
 463
 464    ctx_attribs[num_ctx_attribs++] = __DRI_CTX_ATTRIB_MAJOR_VERSION;
 465    ctx_attribs[num_ctx_attribs++] = major_ver;
 466    ctx_attribs[num_ctx_attribs++] = __DRI_CTX_ATTRIB_MINOR_VERSION;
 467    ctx_attribs[num_ctx_attribs++] = minor_ver;
 468
 469    if (flags != 0) {
 470       ctx_attribs[num_ctx_attribs++] = __DRI_CTX_ATTRIB_FLAGS;
 471
 472       /* The current __DRI_CTX_FLAG_* values are identical to the
 473        * GLX_CONTEXT_*_BIT values.
 474        */
 475       ctx_attribs[num_ctx_attribs++] = flags;
 476    }
 477
 478    pcp->driContext =
 479       (*psc->swrast->createContextAttribs) (psc->driScreen,
 480                                             api,
 481                                             config->driConfig,
 482                                             shared,
 483                                             num_ctx_attribs / 2,
 484                                             ctx_attribs,
 485                                             error,
 486                                             pcp);
 487    if (pcp->driContext == NULL) {
 488       Xfree(pcp);
 489       return NULL;
 490    }
 491
 492    pcp->base.vtable = &drisw_context_vtable;
 493
 494    return &pcp->base;
 495 }
 496
 497 static void
 498 driswDestroyDrawable(__GLXDRIdrawable * pdraw)
 499 {
 500    struct drisw_drawable *pdp = (struct drisw_drawable *) pdraw;
 501    struct drisw_screen *psc = (struct drisw_screen *) pdp->base.psc;
 502
 503    (*psc->core->destroyDrawable) (pdp->driDrawable);
 504
 505    XDestroyDrawable(pdp, pdraw->psc->dpy, pdraw->drawable);
 506    Xfree(pdp);
 507 }
 508
 509 static __GLXDRIdrawable *
 510 driswCreateDrawable(struct glx_screen *base, XID xDrawable,
 511                     GLXDrawable drawable, struct glx_config *modes)
 512 {
 513    struct drisw_drawable *pdp;
 514    __GLXDRIconfigPrivate *config = (__GLXDRIconfigPrivate *) modes;
 515    struct drisw_screen *psc = (struct drisw_screen *) base;
 516
 517    const __DRIswrastExtension *swrast = psc->swrast;
 518
 519    pdp = Xmalloc(sizeof(*pdp));
 520    if (!pdp)
 521       return NULL;
 522
 523    memset(pdp, 0, sizeof *pdp);
 524    pdp->base.xDrawable = xDrawable;
 525    pdp->base.drawable = drawable;
 526    pdp->base.psc = &psc->base;
 527
 528    XCreateDrawable(pdp, psc->base.dpy, xDrawable, modes->visualID);
 529
 530    /* Create a new drawable */
 531    pdp->driDrawable =
 532       (*swrast->createNewDrawable) (psc->driScreen, config->driConfig, pdp);
 533
 534    if (!pdp->driDrawable) {
 535       XDestroyDrawable(pdp, psc->base.dpy, xDrawable);
 536       Xfree(pdp);
 537       return NULL;
 538    }
 539
 540    pdp->base.destroyDrawable = driswDestroyDrawable;
 541
 542    return &pdp->base;
 543 }
 544
 545 static int64_t
 546 driswSwapBuffers(__GLXDRIdrawable * pdraw,
 547                  int64_t target_msc, int64_t divisor, int64_t remainder)
 548 {
 549    struct drisw_drawable *pdp = (struct drisw_drawable *) pdraw;
 550    struct drisw_screen *psc = (struct drisw_screen *) pdp->base.psc;
 551
 552    (void) target_msc;
 553    (void) divisor;
 554    (void) remainder;
 555
 556    (*psc->core->swapBuffers) (pdp->driDrawable);
 557
 558    return 0;
 559 }
 560
 561 static void
 562 driswDestroyScreen(struct glx_screen *base)
 563 {
 564    struct drisw_screen *psc = (struct drisw_screen *) base;
 565
 566    /* Free the direct rendering per screen data */
 567    (*psc->core->destroyScreen) (psc->driScreen);
 568    driDestroyConfigs(psc->driver_configs);
 569    psc->driScreen = NULL;
 570    if (psc->driver)
 571       dlclose(psc->driver);
 572 }
 573
 574 static void *
 575 driOpenSwrast(void)
 576 {
 577    void *driver = NULL;
 578
 579    if (driver == NULL)
 580       driver = driOpenDriver("swrast");
 581
 582    return driver;
 583 }
 584
 585 static const struct glx_screen_vtable drisw_screen_vtable = {
 586    drisw_create_context,
 587    drisw_create_context_attribs
 588 };
 589
 590 static void
 591 driswBindExtensions(struct drisw_screen *psc, const __DRIextension **extensions)
 592 {
 593    int i;
 594
 595    __glXEnableDirectExtension(&psc->base, "GLX_SGI_make_current_read");
 596
 597    if (psc->swrast->base.version >= 3) {
 598       __glXEnableDirectExtension(&psc->base, "GLX_ARB_create_context");
 599       __glXEnableDirectExtension(&psc->base, "GLX_ARB_create_context_profile");
 600
 601       /* DRISW version >= 2 implies support for OpenGL ES 2.0.
 602        */
 603       __glXEnableDirectExtension(&psc->base,
 604                                  "GLX_EXT_create_context_es2_profile");
 605    }
 606
 607    /* FIXME: Figure out what other extensions can be ported here from dri2. */
 608    for (i = 0; extensions[i]; i++) {
 609       if ((strcmp(extensions[i]->name, __DRI_TEX_BUFFER) == 0)) {
 610          psc->texBuffer = (__DRItexBufferExtension *) extensions[i];
 611          __glXEnableDirectExtension(&psc->base, "GLX_EXT_texture_from_pixmap");
 612       }
 613    }
 614 }
 615
 616 static struct glx_screen *
 617 driswCreateScreen(int screen, struct glx_display *priv)
 618 {
 619    __GLXDRIscreen *psp;
 620    const __DRIconfig **driver_configs;
 621    const __DRIextension **extensions;
 622    struct drisw_screen *psc;
 623    struct glx_config *configs = NULL, *visuals = NULL;
 624    int i;
 625
 626    psc = Xcalloc(1, sizeof *psc);
 627    if (psc == NULL)
 628       return NULL;
 629
 630    memset(psc, 0, sizeof *psc);
 631    if (!glx_screen_init(&psc->base, screen, priv)) {
 632       Xfree(psc);
 633       return NULL;
 634    }
 635
 636    psc->driver = driOpenSwrast();
 637    if (psc->driver == NULL)
 638       goto handle_error;
 639
 640    extensions = dlsym(psc->driver, __DRI_DRIVER_EXTENSIONS);
 641    if (extensions == NULL) {
 642       ErrorMessageF("driver exports no extensions (%s)\n", dlerror());
 643       goto handle_error;
 644    }
 645
 646    for (i = 0; extensions[i]; i++) {
 647       if (strcmp(extensions[i]->name, __DRI_CORE) == 0)
 648          psc->core = (__DRIcoreExtension *) extensions[i];
 649       if (strcmp(extensions[i]->name, __DRI_SWRAST) == 0)
 650          psc->swrast = (__DRIswrastExtension *) extensions[i];
 651    }
 652
 653    if (psc->core == NULL || psc->swrast == NULL) {
 654       ErrorMessageF("core dri extension not found\n");
 655       goto handle_error;
 656    }
 657
 658    psc->driScreen =
 659       psc->swrast->createNewScreen(screen, loader_extensions,
 660                                    &driver_configs, psc);
 661    if (psc->driScreen == NULL) {
 662       ErrorMessageF("failed to create dri screen\n");
 663       goto handle_error;
 664    }
 665
 666    extensions = psc->core->getExtensions(psc->driScreen);
 667    driswBindExtensions(psc, extensions);
 668
 669    configs = driConvertConfigs(psc->core, psc->base.configs, driver_configs);
 670    visuals = driConvertConfigs(psc->core, psc->base.visuals, driver_configs);
 671
 672    if (!configs || !visuals)
 673        goto handle_error;
 674
 675    glx_config_destroy_list(psc->base.configs);
 676    psc->base.configs = configs;
 677    glx_config_destroy_list(psc->base.visuals);
 678    psc->base.visuals = visuals;
 679
 680    psc->driver_configs = driver_configs;
 681
 682    psc->base.vtable = &drisw_screen_vtable;
 683    psp = &psc->vtable;
 684    psc->base.driScreen = psp;
 685    psp->destroyScreen = driswDestroyScreen;
 686    psp->createDrawable = driswCreateDrawable;
 687    psp->swapBuffers = driswSwapBuffers;
 688
 689    return &psc->base;
 690
 691  handle_error:
 692    if (configs)
 693        glx_config_destroy_list(configs);
 694    if (visuals)
 695        glx_config_destroy_list(visuals);
 696    if (psc->driScreen)
 697        psc->core->destroyScreen(psc->driScreen);
 698    psc->driScreen = NULL;
 699
 700    if (psc->driver)
 701       dlclose(psc->driver);
 702    glx_screen_cleanup(&psc->base);
 703    Xfree(psc);
 704
 705    ErrorMessageF("reverting to indirect rendering\n");
 706
 707    return NULL;
 708 }
 709
 710 /* Called from __glXFreeDisplayPrivate.
 711  */
 712 static void
 713 driswDestroyDisplay(__GLXDRIdisplay * dpy)
 714 {
 715    Xfree(dpy);
 716 }
 717
 718 /*
 719  * Allocate, initialize and return a __DRIdisplayPrivate object.
 720  * This is called from __glXInitialize() when we are given a new
 721  * display pointer.
 722  */
 723 _X_HIDDEN __GLXDRIdisplay *
 724 driswCreateDisplay(Display * dpy)
 725 {
 726    struct drisw_display *pdpyp;
 727
 728    pdpyp = Xmalloc(sizeof *pdpyp);
 729    if (pdpyp == NULL)
 730       return NULL;
 731
 732    pdpyp->base.destroyDisplay = driswDestroyDisplay;
 733    pdpyp->base.createScreen = driswCreateScreen;
 734
 735    return &pdpyp->base;
 736 }
 737
 738 #endif /* GLX_DIRECT_RENDERING */