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 #include "drisw_priv.h"
  31 #include <X11/extensions/shmproto.h>
  32 #include <assert.h>
  33
  34 static Bool
  35 XCreateGCs(struct drisw_drawable * pdp,
  36            Display * dpy, XID drawable, int visualid)
  37 {
  38    XGCValues gcvalues;
  39    long visMask;
  40    XVisualInfo visTemp;
  41    int num_visuals;
  42
  43    /* create GC's */
  44    pdp->gc = XCreateGC(dpy, drawable, 0, NULL);
  45    pdp->swapgc = XCreateGC(dpy, drawable, 0, NULL);
  46
  47    gcvalues.function = GXcopy;
  48    gcvalues.graphics_exposures = False;
  49    XChangeGC(dpy, pdp->gc, GCFunction, &gcvalues);
  50    XChangeGC(dpy, pdp->swapgc, GCFunction, &gcvalues);
  51    XChangeGC(dpy, pdp->swapgc, GCGraphicsExposures, &gcvalues);
  52
  53    /* visual */
  54    visTemp.visualid = visualid;
  55    visMask = VisualIDMask;
  56    pdp->visinfo = XGetVisualInfo(dpy, visMask, &visTemp, &num_visuals);
  57
  58    if (!pdp->visinfo || num_visuals == 0)
  59       return False;
  60
  61    return True;
  62 }
  63
  64 static int xshm_error = 0;
  65 static int xshm_opcode = -1;
  66
  67 /**
  68  * Catches potential Xlib errors.
  69  */
  70 static int
  71 handle_xerror(Display *dpy, XErrorEvent *event)
  72 {
  73    (void) dpy;
  74
  75    assert(xshm_opcode != -1);
  76    if (event->request_code != xshm_opcode ||
  77        event->minor_code != X_ShmAttach)
  78       return 0;
  79
  80    xshm_error = 1;
  81    return 0;
  82 }
  83
  84 static Bool
  85 XCreateDrawable(struct drisw_drawable * pdp, int shmid, Display * dpy)
  86 {
  87    if (pdp->ximage) {
  88       XDestroyImage(pdp->ximage);
  89       pdp->ximage = NULL;
  90    }
  91
  92    if (!xshm_error && shmid >= 0) {
  93       pdp->shminfo.shmid = shmid;
  94       pdp->ximage = XShmCreateImage(dpy,
  95                                     pdp->visinfo->visual,
  96                                     pdp->visinfo->depth,
  97                                     ZPixmap,              /* format */
  98                                     NULL,                 /* data */
  99                                     &pdp->shminfo,        /* shminfo */
 100                                     0, 0);                /* width, height */
 101       if (pdp->ximage != NULL) {
 102          int (*old_handler)(Display *, XErrorEvent *);
 103
 104          /* dispatch pending errors */
 105          XSync(dpy, False);
 106
 107          old_handler = XSetErrorHandler(handle_xerror);
 108          /* This may trigger the X protocol error we're ready to catch: */
 109          XShmAttach(dpy, &pdp->shminfo);
 110          XSync(dpy, False);
 111
 112          if (xshm_error) {
 113          /* we are on a remote display, this error is normal, don't print it */
 114             XDestroyImage(pdp->ximage);
 115             pdp->ximage = NULL;
 116          }
 117
 118          (void) XSetErrorHandler(old_handler);
 119       }
 120    }
 121
 122    if (pdp->ximage == NULL) {
 123       pdp->shminfo.shmid = -1;
 124       pdp->ximage = XCreateImage(dpy,
 125                                  pdp->visinfo->visual,
 126                                  pdp->visinfo->depth,
 127                                  ZPixmap, 0,             /* format, offset */
 128                                  NULL,                   /* data */
 129                                  0, 0,                   /* width, height */
 130                                  32,                     /* bitmap_pad */
 131                                  0);                     /* bytes_per_line */
 132    }
 133
 134   /**
 135    * swrast does not handle 24-bit depth with 24 bpp, so let X do the
 136    * the conversion for us.
 137    */
 138   if (pdp->ximage->bits_per_pixel == 24)
 139      pdp->ximage->bits_per_pixel = 32;
 140
 141    return True;
 142 }
 143
 144 static void
 145 XDestroyDrawable(struct drisw_drawable * pdp, Display * dpy, XID drawable)
 146 {
 147    if (pdp->ximage)
 148       XDestroyImage(pdp->ximage);
 149
 150    free(pdp->visinfo);
 151
 152    XFreeGC(dpy, pdp->gc);
 153    XFreeGC(dpy, pdp->swapgc);
 154 }
 155
 156 /**
 157  * swrast loader functions
 158  */
 159
 160 static void
 161 swrastGetDrawableInfo(__DRIdrawable * draw,
 162                       int *x, int *y, int *w, int *h,
 163                       void *loaderPrivate)
 164 {
 165    struct drisw_drawable *pdp = loaderPrivate;
 166    __GLXDRIdrawable *pdraw = &(pdp->base);
 167    Display *dpy = pdraw->psc->dpy;
 168    Drawable drawable;
 169
 170    Window root;
 171    unsigned uw, uh, bw, depth;
 172
 173    drawable = pdraw->xDrawable;
 174
 175    XGetGeometry(dpy, drawable, &root, x, y, &uw, &uh, &bw, &depth);
 176    *w = uw;
 177    *h = uh;
 178 }
 179
 180 /**
 181  * Align renderbuffer pitch.
 182  *
 183  * This should be chosen by the driver and the loader (libGL, xserver/glx)
 184  * should use the driver provided pitch.
 185  *
 186  * It seems that the xorg loader (that is the xserver loading swrast_dri for
 187  * indirect rendering, not client-side libGL) requires that the pitch is
 188  * exactly the image width padded to 32 bits. XXX
 189  *
 190  * The above restriction can probably be overcome by using ScratchPixmap and
 191  * CopyArea in the xserver, similar to ShmPutImage, and setting the width of
 192  * the scratch pixmap to 'pitch / cpp'.
 193  */
 194 static inline int
 195 bytes_per_line(unsigned pitch_bits, unsigned mul)
 196 {
 197    unsigned mask = mul - 1;
 198
 199    return ((pitch_bits + mask) & ~mask) / 8;
 200 }
 201
 202 static void
 203 swrastXPutImage(__DRIdrawable * draw, int op,
 204                 int x, int y, int w, int h, int stride,
 205                 int shmid, char *data, void *loaderPrivate)
 206 {
 207    struct drisw_drawable *pdp = loaderPrivate;
 208    __GLXDRIdrawable *pdraw = &(pdp->base);
 209    Display *dpy = pdraw->psc->dpy;
 210    Drawable drawable;
 211    XImage *ximage;
 212    GC gc;
 213
 214    if (!pdp->ximage || shmid != pdp->shminfo.shmid) {
 215       if (!XCreateDrawable(pdp, shmid, dpy))
 216          return;
 217    }
 218
 219    switch (op) {
 220    case __DRI_SWRAST_IMAGE_OP_DRAW:
 221       gc = pdp->gc;
 222       break;
 223    case __DRI_SWRAST_IMAGE_OP_SWAP:
 224       gc = pdp->swapgc;
 225       break;
 226    default:
 227       return;
 228    }
 229
 230    drawable = pdraw->xDrawable;
 231    ximage = pdp->ximage;
 232    ximage->bytes_per_line = stride ? stride : bytes_per_line(w * ximage->bits_per_pixel, 32);
 233    ximage->data = data;
 234
 235    if (pdp->shminfo.shmid >= 0) {
 236       ximage->width = ximage->bytes_per_line / ((ximage->bits_per_pixel + 7)/ 8);
 237       ximage->height = h;
 238       XShmPutImage(dpy, drawable, gc, ximage, 0, 0, x, y, w, h, False);
 239       XSync(dpy, False);
 240    } else {
 241       ximage->width = w;
 242       ximage->height = h;
 243       XPutImage(dpy, drawable, gc, ximage, 0, 0, x, y, w, h);
 244    }
 245    ximage->data = NULL;
 246 }
 247
 248 static void
 249 swrastPutImageShm(__DRIdrawable * draw, int op,
 250                   int x, int y, int w, int h, int stride,
 251                   int shmid, char *shmaddr, unsigned offset,
 252                   void *loaderPrivate)
 253 {
 254    struct drisw_drawable *pdp = loaderPrivate;
 255
 256    pdp->shminfo.shmaddr = shmaddr;
 257    swrastXPutImage(draw, op, x, y, w, h, stride, shmid,
 258                    shmaddr + offset, loaderPrivate);
 259 }
 260
 261 static void
 262 swrastPutImage2(__DRIdrawable * draw, int op,
 263                 int x, int y, int w, int h, int stride,
 264                 char *data, void *loaderPrivate)
 265 {
 266    swrastXPutImage(draw, op, x, y, w, h, stride, -1,
 267                    data, loaderPrivate);
 268 }
 269
 270 static void
 271 swrastPutImage(__DRIdrawable * draw, int op,
 272                int x, int y, int w, int h,
 273                char *data, void *loaderPrivate)
 274 {
 275    swrastXPutImage(draw, op, x, y, w, h, 0, -1,
 276                    data, loaderPrivate);
 277 }
 278
 279 static void
 280 swrastGetImage2(__DRIdrawable * read,
 281                 int x, int y, int w, int h, int stride,
 282                 char *data, void *loaderPrivate)
 283 {
 284    struct drisw_drawable *prp = loaderPrivate;
 285    __GLXDRIdrawable *pread = &(prp->base);
 286    Display *dpy = pread->psc->dpy;
 287    Drawable readable;
 288    XImage *ximage;
 289
 290    if (!prp->ximage || prp->shminfo.shmid >= 0) {
 291       if (!XCreateDrawable(prp, -1, dpy))
 292          return;
 293    }
 294
 295    readable = pread->xDrawable;
 296
 297    ximage = prp->ximage;
 298    ximage->data = data;
 299    ximage->width = w;
 300    ximage->height = h;
 301    ximage->bytes_per_line = stride ? stride : bytes_per_line(w * ximage->bits_per_pixel, 32);
 302
 303    XGetSubImage(dpy, readable, x, y, w, h, ~0L, ZPixmap, ximage, 0, 0);
 304
 305    ximage->data = NULL;
 306 }
 307
 308 static void
 309 swrastGetImage(__DRIdrawable * read,
 310                int x, int y, int w, int h,
 311                char *data, void *loaderPrivate)
 312 {
 313    swrastGetImage2(read, x, y, w, h, 0, data, loaderPrivate);
 314 }
 315
 316 static void
 317 swrastGetImageShm(__DRIdrawable * read,
 318                   int x, int y, int w, int h,
 319                   int shmid, void *loaderPrivate)
 320 {
 321    struct drisw_drawable *prp = loaderPrivate;
 322    __GLXDRIdrawable *pread = &(prp->base);
 323    Display *dpy = pread->psc->dpy;
 324    Drawable readable;
 325    XImage *ximage;
 326
 327    if (!prp->ximage || shmid != prp->shminfo.shmid) {
 328       if (!XCreateDrawable(prp, shmid, dpy))
 329          return;
 330    }
 331    readable = pread->xDrawable;
 332
 333    ximage = prp->ximage;
 334    ximage->data = prp->shminfo.shmaddr; /* no offset */
 335    ximage->width = w;
 336    ximage->height = h;
 337    ximage->bytes_per_line = bytes_per_line(w * ximage->bits_per_pixel, 32);
 338
 339    XShmGetImage(dpy, readable, ximage, x, y, ~0L);
 340 }
 341
 342 static const __DRIswrastLoaderExtension swrastLoaderExtension_shm = {
 343    .base = {__DRI_SWRAST_LOADER, 4 },
 344
 345    .getDrawableInfo     = swrastGetDrawableInfo,
 346    .putImage            = swrastPutImage,
 347    .getImage            = swrastGetImage,
 348    .putImage2           = swrastPutImage2,
 349    .getImage2           = swrastGetImage2,
 350    .putImageShm         = swrastPutImageShm,
 351    .getImageShm         = swrastGetImageShm,
 352 };
 353
 354 static const __DRIextension *loader_extensions_shm[] = {
 355    &swrastLoaderExtension_shm.base,
 356    NULL
 357 };
 358
 359 static const __DRIswrastLoaderExtension swrastLoaderExtension = {
 360    .base = {__DRI_SWRAST_LOADER, 3 },
 361
 362    .getDrawableInfo     = swrastGetDrawableInfo,
 363    .putImage            = swrastPutImage,
 364    .getImage            = swrastGetImage,
 365    .putImage2           = swrastPutImage2,
 366    .getImage2           = swrastGetImage2,
 367 };
 368
 369 static const __DRIextension *loader_extensions_noshm[] = {
 370    &swrastLoaderExtension.base,
 371    NULL
 372 };
 373
 374 /**
 375  * GLXDRI functions
 376  */
 377
 378 static void
 379 drisw_destroy_context(struct glx_context *context)
 380 {
 381    struct drisw_context *pcp = (struct drisw_context *) context;
 382    struct drisw_screen *psc = (struct drisw_screen *) context->psc;
 383
 384    driReleaseDrawables(&pcp->base);
 385
 386    free((char *) context->extensions);
 387
 388    (*psc->core->destroyContext) (pcp->driContext);
 389
 390    free(pcp);
 391 }
 392
 393 static int
 394 drisw_bind_context(struct glx_context *context, struct glx_context *old,
 395                    GLXDrawable draw, GLXDrawable read)
 396 {
 397    struct drisw_context *pcp = (struct drisw_context *) context;
 398    struct drisw_screen *psc = (struct drisw_screen *) pcp->base.psc;
 399    struct drisw_drawable *pdraw, *pread;
 400
 401    pdraw = (struct drisw_drawable *) driFetchDrawable(context, draw);
 402    pread = (struct drisw_drawable *) driFetchDrawable(context, read);
 403
 404    driReleaseDrawables(&pcp->base);
 405
 406    if ((*psc->core->bindContext) (pcp->driContext,
 407                                   pdraw ? pdraw->driDrawable : NULL,
 408                                   pread ? pread->driDrawable : NULL))
 409       return Success;
 410
 411    return GLXBadContext;
 412 }
 413
 414 static void
 415 drisw_unbind_context(struct glx_context *context, struct glx_context *new)
 416 {
 417    struct drisw_context *pcp = (struct drisw_context *) context;
 418    struct drisw_screen *psc = (struct drisw_screen *) pcp->base.psc;
 419
 420    (*psc->core->unbindContext) (pcp->driContext);
 421 }
 422
 423 static void
 424 drisw_bind_tex_image(Display * dpy,
 425                     GLXDrawable drawable,
 426                     int buffer, const int *attrib_list)
 427 {
 428    struct glx_context *gc = __glXGetCurrentContext();
 429    struct drisw_context *pcp = (struct drisw_context *) gc;
 430    __GLXDRIdrawable *base = GetGLXDRIDrawable(dpy, drawable);
 431    struct drisw_drawable *pdraw = (struct drisw_drawable *) base;
 432    struct drisw_screen *psc;
 433
 434    __glXInitialize(dpy);
 435
 436    if (pdraw != NULL) {
 437       psc = (struct drisw_screen *) base->psc;
 438
 439       if (!psc->texBuffer)
 440          return;
 441
 442       if (psc->texBuffer->base.version >= 2 &&
 443         psc->texBuffer->setTexBuffer2 != NULL) {
 444               (*psc->texBuffer->setTexBuffer2) (pcp->driContext,
 445                                            pdraw->base.textureTarget,
 446                                            pdraw->base.textureFormat,
 447                                            pdraw->driDrawable);
 448       }
 449       else {
 450               (*psc->texBuffer->setTexBuffer) (pcp->driContext,
 451                                           pdraw->base.textureTarget,
 452                                           pdraw->driDrawable);
 453       }
 454    }
 455 }
 456
 457 static void
 458 drisw_release_tex_image(Display * dpy, GLXDrawable drawable, int buffer)
 459 {
 460    struct glx_context *gc = __glXGetCurrentContext();
 461    struct drisw_context *pcp = (struct drisw_context *) gc;
 462    __GLXDRIdrawable *base = GetGLXDRIDrawable(dpy, drawable);
 463    struct glx_display *dpyPriv = __glXInitialize(dpy);
 464    struct drisw_drawable *pdraw = (struct drisw_drawable *) base;
 465    struct drisw_screen *psc;
 466
 467    if (dpyPriv != NULL && pdraw != NULL) {
 468       psc = (struct drisw_screen *) base->psc;
 469
 470       if (!psc->texBuffer)
 471          return;
 472
 473       if (psc->texBuffer->base.version >= 3 &&
 474           psc->texBuffer->releaseTexBuffer != NULL) {
 475          (*psc->texBuffer->releaseTexBuffer) (pcp->driContext,
 476                                            pdraw->base.textureTarget,
 477                                            pdraw->driDrawable);
 478       }
 479    }
 480 }
 481
 482 static const struct glx_context_vtable drisw_context_vtable = {
 483    .destroy             = drisw_destroy_context,
 484    .bind                = drisw_bind_context,
 485    .unbind              = drisw_unbind_context,
 486    .wait_gl             = NULL,
 487    .wait_x              = NULL,
 488    .use_x_font          = DRI_glXUseXFont,
 489    .bind_tex_image      = drisw_bind_tex_image,
 490    .release_tex_image   = drisw_release_tex_image,
 491    .get_proc_address    = NULL,
 492 };
 493
 494 static struct glx_context *
 495 drisw_create_context(struct glx_screen *base,
 496                      struct glx_config *config_base,
 497                      struct glx_context *shareList, int renderType)
 498 {
 499    struct drisw_context *pcp, *pcp_shared;
 500    __GLXDRIconfigPrivate *config = (__GLXDRIconfigPrivate *) config_base;
 501    struct drisw_screen *psc = (struct drisw_screen *) base;
 502    __DRIcontext *shared = NULL;
 503
 504    if (!psc->base.driScreen)
 505       return NULL;
 506
 507    /* Check the renderType value */
 508    if (!validate_renderType_against_config(config_base, renderType))
 509        return NULL;
 510
 511    if (shareList) {
 512       /* If the shareList context is not a DRISW context, we cannot possibly
 513        * create a DRISW context that shares it.
 514        */
 515       if (shareList->vtable->destroy != drisw_destroy_context) {
 516          return NULL;
 517       }
 518
 519       pcp_shared = (struct drisw_context *) shareList;
 520       shared = pcp_shared->driContext;
 521    }
 522
 523    pcp = calloc(1, sizeof *pcp);
 524    if (pcp == NULL)
 525       return NULL;
 526
 527    if (!glx_context_init(&pcp->base, &psc->base, &config->base)) {
 528       free(pcp);
 529       return NULL;
 530    }
 531
 532    pcp->base.renderType = renderType;
 533
 534    pcp->driContext =
 535       (*psc->core->createNewContext) (psc->driScreen,
 536                                       config->driConfig, shared, pcp);
 537    if (pcp->driContext == NULL) {
 538       free(pcp);
 539       return NULL;
 540    }
 541
 542    pcp->base.vtable = &drisw_context_vtable;
 543
 544    return &pcp->base;
 545 }
 546
 547 static struct glx_context *
 548 drisw_create_context_attribs(struct glx_screen *base,
 549                              struct glx_config *config_base,
 550                              struct glx_context *shareList,
 551                              unsigned num_attribs,
 552                              const uint32_t *attribs,
 553                              unsigned *error)
 554 {
 555    struct drisw_context *pcp, *pcp_shared;
 556    __GLXDRIconfigPrivate *config = (__GLXDRIconfigPrivate *) config_base;
 557    struct drisw_screen *psc = (struct drisw_screen *) base;
 558    __DRIcontext *shared = NULL;
 559
 560    uint32_t minor_ver;
 561    uint32_t major_ver;
 562    uint32_t renderType;
 563    uint32_t flags;
 564    unsigned api;
 565    int reset;
 566    int release;
 567    uint32_t ctx_attribs[2 * 5];
 568    unsigned num_ctx_attribs = 0;
 569
 570    if (!psc->base.driScreen)
 571       return NULL;
 572
 573    if (psc->swrast->base.version < 3)
 574       return NULL;
 575
 576    /* Remap the GLX tokens to DRI2 tokens.
 577     */
 578    if (!dri2_convert_glx_attribs(num_attribs, attribs,
 579                                  &major_ver, &minor_ver, &renderType, &flags,
 580                                  &api, &reset, &release, error))
 581       return NULL;
 582
 583    /* Check the renderType value */
 584    if (!validate_renderType_against_config(config_base, renderType)) {
 585        return NULL;
 586    }
 587
 588    if (reset != __DRI_CTX_RESET_NO_NOTIFICATION)
 589       return NULL;
 590
 591    if (release != __DRI_CTX_RELEASE_BEHAVIOR_FLUSH &&
 592        release != __DRI_CTX_RELEASE_BEHAVIOR_NONE)
 593       return NULL;
 594
 595    if (shareList) {
 596       pcp_shared = (struct drisw_context *) shareList;
 597       shared = pcp_shared->driContext;
 598    }
 599
 600    pcp = calloc(1, sizeof *pcp);
 601    if (pcp == NULL)
 602       return NULL;
 603
 604    if (!glx_context_init(&pcp->base, &psc->base, config_base)) {
 605       free(pcp);
 606       return NULL;
 607    }
 608
 609    ctx_attribs[num_ctx_attribs++] = __DRI_CTX_ATTRIB_MAJOR_VERSION;
 610    ctx_attribs[num_ctx_attribs++] = major_ver;
 611    ctx_attribs[num_ctx_attribs++] = __DRI_CTX_ATTRIB_MINOR_VERSION;
 612    ctx_attribs[num_ctx_attribs++] = minor_ver;
 613    if (release != __DRI_CTX_RELEASE_BEHAVIOR_FLUSH) {
 614        ctx_attribs[num_ctx_attribs++] = __DRI_CTX_ATTRIB_RELEASE_BEHAVIOR;
 615        ctx_attribs[num_ctx_attribs++] = release;
 616    }
 617
 618    if (flags != 0) {
 619       ctx_attribs[num_ctx_attribs++] = __DRI_CTX_ATTRIB_FLAGS;
 620
 621       /* The current __DRI_CTX_FLAG_* values are identical to the
 622        * GLX_CONTEXT_*_BIT values.
 623        */
 624       ctx_attribs[num_ctx_attribs++] = flags;
 625    }
 626
 627    pcp->base.renderType = renderType;
 628
 629    pcp->driContext =
 630       (*psc->swrast->createContextAttribs) (psc->driScreen,
 631                                             api,
 632                                             config ? config->driConfig : 0,
 633                                             shared,
 634                                             num_ctx_attribs / 2,
 635                                             ctx_attribs,
 636                                             error,
 637                                             pcp);
 638    if (pcp->driContext == NULL) {
 639       free(pcp);
 640       return NULL;
 641    }
 642
 643    pcp->base.vtable = &drisw_context_vtable;
 644
 645    return &pcp->base;
 646 }
 647
 648 static void
 649 driswDestroyDrawable(__GLXDRIdrawable * pdraw)
 650 {
 651    struct drisw_drawable *pdp = (struct drisw_drawable *) pdraw;
 652    struct drisw_screen *psc = (struct drisw_screen *) pdp->base.psc;
 653
 654    (*psc->core->destroyDrawable) (pdp->driDrawable);
 655
 656    XDestroyDrawable(pdp, pdraw->psc->dpy, pdraw->drawable);
 657    free(pdp);
 658 }
 659
 660 static __GLXDRIdrawable *
 661 driswCreateDrawable(struct glx_screen *base, XID xDrawable,
 662                     GLXDrawable drawable, struct glx_config *modes)
 663 {
 664    struct drisw_drawable *pdp;
 665    __GLXDRIconfigPrivate *config = (__GLXDRIconfigPrivate *) modes;
 666    struct drisw_screen *psc = (struct drisw_screen *) base;
 667    Bool ret;
 668    const __DRIswrastExtension *swrast = psc->swrast;
 669
 670    pdp = calloc(1, sizeof(*pdp));
 671    if (!pdp)
 672       return NULL;
 673
 674    pdp->base.xDrawable = xDrawable;
 675    pdp->base.drawable = drawable;
 676    pdp->base.psc = &psc->base;
 677
 678    ret = XCreateGCs(pdp, psc->base.dpy, xDrawable, modes->visualID);
 679    if (!ret) {
 680       free(pdp);
 681       return NULL;
 682    }
 683
 684    /* Create a new drawable */
 685    pdp->driDrawable =
 686       (*swrast->createNewDrawable) (psc->driScreen, config->driConfig, pdp);
 687
 688    if (!pdp->driDrawable) {
 689       XDestroyDrawable(pdp, psc->base.dpy, xDrawable);
 690       free(pdp);
 691       return NULL;
 692    }
 693
 694    pdp->base.destroyDrawable = driswDestroyDrawable;
 695
 696    return &pdp->base;
 697 }
 698
 699 static int64_t
 700 driswSwapBuffers(__GLXDRIdrawable * pdraw,
 701                  int64_t target_msc, int64_t divisor, int64_t remainder,
 702                  Bool flush)
 703 {
 704    struct drisw_drawable *pdp = (struct drisw_drawable *) pdraw;
 705    struct drisw_screen *psc = (struct drisw_screen *) pdp->base.psc;
 706
 707    (void) target_msc;
 708    (void) divisor;
 709    (void) remainder;
 710
 711    if (flush) {
 712       glFlush();
 713    }
 714
 715    (*psc->core->swapBuffers) (pdp->driDrawable);
 716
 717    return 0;
 718 }
 719
 720 static void
 721 driswCopySubBuffer(__GLXDRIdrawable * pdraw,
 722                    int x, int y, int width, int height, Bool flush)
 723 {
 724    struct drisw_drawable *pdp = (struct drisw_drawable *) pdraw;
 725    struct drisw_screen *psc = (struct drisw_screen *) pdp->base.psc;
 726
 727    if (flush) {
 728       glFlush();
 729    }
 730
 731    (*psc->copySubBuffer->copySubBuffer) (pdp->driDrawable,
 732                                             x, y, width, height);
 733 }
 734
 735 static void
 736 driswDestroyScreen(struct glx_screen *base)
 737 {
 738    struct drisw_screen *psc = (struct drisw_screen *) base;
 739
 740    /* Free the direct rendering per screen data */
 741    (*psc->core->destroyScreen) (psc->driScreen);
 742    driDestroyConfigs(psc->driver_configs);
 743    psc->driScreen = NULL;
 744    if (psc->driver)
 745       dlclose(psc->driver);
 746    free(psc);
 747 }
 748
 749 #define SWRAST_DRIVER_NAME "swrast"
 750
 751 static const struct glx_screen_vtable drisw_screen_vtable = {
 752    .create_context         = drisw_create_context,
 753    .create_context_attribs = drisw_create_context_attribs,
 754    .query_renderer_integer = drisw_query_renderer_integer,
 755    .query_renderer_string  = drisw_query_renderer_string,
 756 };
 757
 758 static void
 759 driswBindExtensions(struct drisw_screen *psc, const __DRIextension **extensions)
 760 {
 761    int i;
 762
 763    __glXEnableDirectExtension(&psc->base, "GLX_SGI_make_current_read");
 764
 765    if (psc->swrast->base.version >= 3) {
 766       __glXEnableDirectExtension(&psc->base, "GLX_ARB_create_context");
 767       __glXEnableDirectExtension(&psc->base, "GLX_ARB_create_context_profile");
 768
 769       /* DRISW version >= 2 implies support for OpenGL ES.
 770        */
 771       __glXEnableDirectExtension(&psc->base,
 772                                  "GLX_EXT_create_context_es_profile");
 773       __glXEnableDirectExtension(&psc->base,
 774                                  "GLX_EXT_create_context_es2_profile");
 775    }
 776
 777    if (psc->copySubBuffer)
 778       __glXEnableDirectExtension(&psc->base, "GLX_MESA_copy_sub_buffer");
 779
 780    /* FIXME: Figure out what other extensions can be ported here from dri2. */
 781    for (i = 0; extensions[i]; i++) {
 782       if ((strcmp(extensions[i]->name, __DRI_TEX_BUFFER) == 0)) {
 783          psc->texBuffer = (__DRItexBufferExtension *) extensions[i];
 784          __glXEnableDirectExtension(&psc->base, "GLX_EXT_texture_from_pixmap");
 785       }
 786       /* DRISW version 3 is also required because GLX_MESA_query_renderer
 787        * requires GLX_ARB_create_context_profile.
 788        */
 789       if (psc->swrast->base.version >= 3
 790           && strcmp(extensions[i]->name, __DRI2_RENDERER_QUERY) == 0) {
 791          psc->rendererQuery = (__DRI2rendererQueryExtension *) extensions[i];
 792          __glXEnableDirectExtension(&psc->base, "GLX_MESA_query_renderer");
 793       }
 794       if (strcmp(extensions[i]->name, __DRI2_FLUSH_CONTROL) == 0) {
 795           __glXEnableDirectExtension(&psc->base,
 796                                      "GLX_ARB_context_flush_control");
 797       }
 798    }
 799 }
 800
 801 static int
 802 check_xshm(Display *dpy)
 803 {
 804    int ignore;
 805
 806    return XQueryExtension(dpy, "MIT-SHM", &xshm_opcode, &ignore, &ignore);
 807 }
 808
 809 static struct glx_screen *
 810 driswCreateScreen(int screen, struct glx_display *priv)
 811 {
 812    __GLXDRIscreen *psp;
 813    const __DRIconfig **driver_configs;
 814    const __DRIextension **extensions;
 815    struct drisw_screen *psc;
 816    struct glx_config *configs = NULL, *visuals = NULL;
 817    int i;
 818    const __DRIextension **loader_extensions_local;
 819
 820    psc = calloc(1, sizeof *psc);
 821    if (psc == NULL)
 822       return NULL;
 823
 824    if (!glx_screen_init(&psc->base, screen, priv)) {
 825       free(psc);
 826       return NULL;
 827    }
 828
 829    extensions = driOpenDriver(SWRAST_DRIVER_NAME, &psc->driver);
 830    if (extensions == NULL)
 831       goto handle_error;
 832
 833    if (!check_xshm(psc->base.dpy))
 834       loader_extensions_local = loader_extensions_noshm;
 835    else
 836       loader_extensions_local = loader_extensions_shm;
 837
 838    for (i = 0; extensions[i]; i++) {
 839       if (strcmp(extensions[i]->name, __DRI_CORE) == 0)
 840          psc->core = (__DRIcoreExtension *) extensions[i];
 841       if (strcmp(extensions[i]->name, __DRI_SWRAST) == 0)
 842          psc->swrast = (__DRIswrastExtension *) extensions[i];
 843       if (strcmp(extensions[i]->name, __DRI_COPY_SUB_BUFFER) == 0)
 844          psc->copySubBuffer = (__DRIcopySubBufferExtension *) extensions[i];
 845    }
 846
 847    if (psc->core == NULL || psc->swrast == NULL) {
 848       ErrorMessageF("core dri extension not found\n");
 849       goto handle_error;
 850    }
 851
 852    if (psc->swrast->base.version >= 4) {
 853       psc->driScreen =
 854          psc->swrast->createNewScreen2(screen, loader_extensions_local,
 855                                        extensions,
 856                                        &driver_configs, psc);
 857    } else {
 858       psc->driScreen =
 859          psc->swrast->createNewScreen(screen, loader_extensions_local,
 860                                       &driver_configs, psc);
 861    }
 862    if (psc->driScreen == NULL) {
 863       ErrorMessageF("failed to create dri screen\n");
 864       goto handle_error;
 865    }
 866
 867    extensions = psc->core->getExtensions(psc->driScreen);
 868    driswBindExtensions(psc, extensions);
 869
 870    configs = driConvertConfigs(psc->core, psc->base.configs, driver_configs);
 871    visuals = driConvertConfigs(psc->core, psc->base.visuals, driver_configs);
 872
 873    if (!configs || !visuals) {
 874        ErrorMessageF("No matching fbConfigs or visuals found\n");
 875        goto handle_error;
 876    }
 877
 878    glx_config_destroy_list(psc->base.configs);
 879    psc->base.configs = configs;
 880    glx_config_destroy_list(psc->base.visuals);
 881    psc->base.visuals = visuals;
 882
 883    psc->driver_configs = driver_configs;
 884
 885    psc->base.vtable = &drisw_screen_vtable;
 886    psp = &psc->vtable;
 887    psc->base.driScreen = psp;
 888    psp->destroyScreen = driswDestroyScreen;
 889    psp->createDrawable = driswCreateDrawable;
 890    psp->swapBuffers = driswSwapBuffers;
 891
 892    if (psc->copySubBuffer)
 893       psp->copySubBuffer = driswCopySubBuffer;
 894
 895    return &psc->base;
 896
 897  handle_error:
 898    if (configs)
 899        glx_config_destroy_list(configs);
 900    if (visuals)
 901        glx_config_destroy_list(visuals);
 902    if (psc->driScreen)
 903        psc->core->destroyScreen(psc->driScreen);
 904    psc->driScreen = NULL;
 905
 906    if (psc->driver)
 907       dlclose(psc->driver);
 908    glx_screen_cleanup(&psc->base);
 909    free(psc);
 910
 911    CriticalErrorMessageF("failed to load driver: %s\n", SWRAST_DRIVER_NAME);
 912
 913    return NULL;
 914 }
 915
 916 /* Called from __glXFreeDisplayPrivate.
 917  */
 918 static void
 919 driswDestroyDisplay(__GLXDRIdisplay * dpy)
 920 {
 921    free(dpy);
 922 }
 923
 924 /*
 925  * Allocate, initialize and return a __DRIdisplayPrivate object.
 926  * This is called from __glXInitialize() when we are given a new
 927  * display pointer.
 928  */
 929 _X_HIDDEN __GLXDRIdisplay *
 930 driswCreateDisplay(Display * dpy)
 931 {
 932    struct drisw_display *pdpyp;
 933
 934    pdpyp = malloc(sizeof *pdpyp);
 935    if (pdpyp == NULL)
 936       return NULL;
 937
 938    pdpyp->base.destroyDisplay = driswDestroyDisplay;
 939    pdpyp->base.createScreen = driswCreateScreen;
 940
 941    return &pdpyp->base;
 942 }
 943
 944 #endif /* GLX_DIRECT_RENDERING */