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