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    if (pdp->shminfo.shmid > 0)
 151       XShmDetach(dpy, &pdp->shminfo);
 152
 153    free(pdp->visinfo);
 154
 155    XFreeGC(dpy, pdp->gc);
 156    XFreeGC(dpy, pdp->swapgc);
 157 }
 158
 159 /**
 160  * swrast loader functions
 161  */
 162
 163 static void
 164 swrastGetDrawableInfo(__DRIdrawable * draw,
 165                       int *x, int *y, int *w, int *h,
 166                       void *loaderPrivate)
 167 {
 168    struct drisw_drawable *pdp = loaderPrivate;
 169    __GLXDRIdrawable *pdraw = &(pdp->base);
 170    Display *dpy = pdraw->psc->dpy;
 171    Drawable drawable;
 172
 173    Window root;
 174    unsigned uw, uh, bw, depth;
 175
 176    drawable = pdraw->xDrawable;
 177
 178    XGetGeometry(dpy, drawable, &root, x, y, &uw, &uh, &bw, &depth);
 179    *w = uw;
 180    *h = uh;
 181 }
 182
 183 /**
 184  * Align renderbuffer pitch.
 185  *
 186  * This should be chosen by the driver and the loader (libGL, xserver/glx)
 187  * should use the driver provided pitch.
 188  *
 189  * It seems that the xorg loader (that is the xserver loading swrast_dri for
 190  * indirect rendering, not client-side libGL) requires that the pitch is
 191  * exactly the image width padded to 32 bits. XXX
 192  *
 193  * The above restriction can probably be overcome by using ScratchPixmap and
 194  * CopyArea in the xserver, similar to ShmPutImage, and setting the width of
 195  * the scratch pixmap to 'pitch / cpp'.
 196  */
 197 static inline int
 198 bytes_per_line(unsigned pitch_bits, unsigned mul)
 199 {
 200    unsigned mask = mul - 1;
 201
 202    return ((pitch_bits + mask) & ~mask) / 8;
 203 }
 204
 205 static void
 206 swrastXPutImage(__DRIdrawable * draw, int op,
 207                 int srcx, int srcy, int x, int y,
 208                 int w, int h, int stride,
 209                 int shmid, char *data, void *loaderPrivate)
 210 {
 211    struct drisw_drawable *pdp = loaderPrivate;
 212    __GLXDRIdrawable *pdraw = &(pdp->base);
 213    Display *dpy = pdraw->psc->dpy;
 214    Drawable drawable;
 215    XImage *ximage;
 216    GC gc;
 217
 218    if (!pdp->ximage || shmid != pdp->shminfo.shmid) {
 219       if (!XCreateDrawable(pdp, shmid, dpy))
 220          return;
 221    }
 222
 223    switch (op) {
 224    case __DRI_SWRAST_IMAGE_OP_DRAW:
 225       gc = pdp->gc;
 226       break;
 227    case __DRI_SWRAST_IMAGE_OP_SWAP:
 228       gc = pdp->swapgc;
 229       break;
 230    default:
 231       return;
 232    }
 233
 234    drawable = pdraw->xDrawable;
 235    ximage = pdp->ximage;
 236    ximage->bytes_per_line = stride ? stride : bytes_per_line(w * ximage->bits_per_pixel, 32);
 237    ximage->data = data;
 238
 239    if (pdp->shminfo.shmid >= 0) {
 240       ximage->width = ximage->bytes_per_line / ((ximage->bits_per_pixel + 7)/ 8);
 241       ximage->height = h;
 242       XShmPutImage(dpy, drawable, gc, ximage, srcx, srcy, x, y, w, h, False);
 243       XSync(dpy, False);
 244    } else {
 245       ximage->width = w;
 246       ximage->height = h;
 247       XPutImage(dpy, drawable, gc, ximage, srcx, srcy, x, y, w, h);
 248    }
 249    ximage->data = NULL;
 250 }
 251
 252 static void
 253 swrastPutImageShm(__DRIdrawable * draw, int op,
 254                   int x, int y, int w, int h, int stride,
 255                   int shmid, char *shmaddr, unsigned offset,
 256                   void *loaderPrivate)
 257 {
 258    struct drisw_drawable *pdp = loaderPrivate;
 259
 260    pdp->shminfo.shmaddr = shmaddr;
 261    swrastXPutImage(draw, op, 0, 0, x, y, w, h, stride, shmid,
 262                    shmaddr + offset, loaderPrivate);
 263 }
 264
 265 static void
 266 swrastPutImageShm2(__DRIdrawable * draw, int op,
 267                    int x, int y,
 268                    int w, int h, int stride,
 269                    int shmid, char *shmaddr, unsigned offset,
 270                    void *loaderPrivate)
 271 {
 272    struct drisw_drawable *pdp = loaderPrivate;
 273
 274    pdp->shminfo.shmaddr = shmaddr;
 275    swrastXPutImage(draw, op, x, 0, x, y, w, h, stride, shmid,
 276                    shmaddr + offset, loaderPrivate);
 277 }
 278
 279 static void
 280 swrastPutImage2(__DRIdrawable * draw, int op,
 281                 int x, int y, int w, int h, int stride,
 282                 char *data, void *loaderPrivate)
 283 {
 284    swrastXPutImage(draw, op, 0, 0, x, y, w, h, stride, -1,
 285                    data, loaderPrivate);
 286 }
 287
 288 static void
 289 swrastPutImage(__DRIdrawable * draw, int op,
 290                int x, int y, int w, int h,
 291                char *data, void *loaderPrivate)
 292 {
 293    swrastXPutImage(draw, op, 0, 0, x, y, w, h, 0, -1,
 294                    data, loaderPrivate);
 295 }
 296
 297 static void
 298 swrastGetImage2(__DRIdrawable * read,
 299                 int x, int y, int w, int h, int stride,
 300                 char *data, void *loaderPrivate)
 301 {
 302    struct drisw_drawable *prp = loaderPrivate;
 303    __GLXDRIdrawable *pread = &(prp->base);
 304    Display *dpy = pread->psc->dpy;
 305    Drawable readable;
 306    XImage *ximage;
 307
 308    if (!prp->ximage || prp->shminfo.shmid >= 0) {
 309       if (!XCreateDrawable(prp, -1, dpy))
 310          return;
 311    }
 312
 313    readable = pread->xDrawable;
 314
 315    ximage = prp->ximage;
 316    ximage->data = data;
 317    ximage->width = w;
 318    ximage->height = h;
 319    ximage->bytes_per_line = stride ? stride : bytes_per_line(w * ximage->bits_per_pixel, 32);
 320
 321    XGetSubImage(dpy, readable, x, y, w, h, ~0L, ZPixmap, ximage, 0, 0);
 322
 323    ximage->data = NULL;
 324 }
 325
 326 static void
 327 swrastGetImage(__DRIdrawable * read,
 328                int x, int y, int w, int h,
 329                char *data, void *loaderPrivate)
 330 {
 331    swrastGetImage2(read, x, y, w, h, 0, data, loaderPrivate);
 332 }
 333
 334 static void
 335 swrastGetImageShm(__DRIdrawable * read,
 336                   int x, int y, int w, int h,
 337                   int shmid, void *loaderPrivate)
 338 {
 339    struct drisw_drawable *prp = loaderPrivate;
 340    __GLXDRIdrawable *pread = &(prp->base);
 341    Display *dpy = pread->psc->dpy;
 342    Drawable readable;
 343    XImage *ximage;
 344
 345    if (!prp->ximage || shmid != prp->shminfo.shmid) {
 346       if (!XCreateDrawable(prp, shmid, dpy))
 347          return;
 348    }
 349    readable = pread->xDrawable;
 350
 351    ximage = prp->ximage;
 352    ximage->data = prp->shminfo.shmaddr; /* no offset */
 353    ximage->width = w;
 354    ximage->height = h;
 355    ximage->bytes_per_line = bytes_per_line(w * ximage->bits_per_pixel, 32);
 356
 357    XShmGetImage(dpy, readable, ximage, x, y, ~0L);
 358 }
 359
 360 static const __DRIswrastLoaderExtension swrastLoaderExtension_shm = {
 361    .base = {__DRI_SWRAST_LOADER, 5 },
 362
 363    .getDrawableInfo     = swrastGetDrawableInfo,
 364    .putImage            = swrastPutImage,
 365    .getImage            = swrastGetImage,
 366    .putImage2           = swrastPutImage2,
 367    .getImage2           = swrastGetImage2,
 368    .putImageShm         = swrastPutImageShm,
 369    .getImageShm         = swrastGetImageShm,
 370    .putImageShm2        = swrastPutImageShm2,
 371 };
 372
 373 static const __DRIextension *loader_extensions_shm[] = {
 374    &swrastLoaderExtension_shm.base,
 375    NULL
 376 };
 377
 378 static const __DRIswrastLoaderExtension swrastLoaderExtension = {
 379    .base = {__DRI_SWRAST_LOADER, 3 },
 380
 381    .getDrawableInfo     = swrastGetDrawableInfo,
 382    .putImage            = swrastPutImage,
 383    .getImage            = swrastGetImage,
 384    .putImage2           = swrastPutImage2,
 385    .getImage2           = swrastGetImage2,
 386 };
 387
 388 static const __DRIextension *loader_extensions_noshm[] = {
 389    &swrastLoaderExtension.base,
 390    NULL
 391 };
 392
 393 /**
 394  * GLXDRI functions
 395  */
 396
 397 static void
 398 drisw_destroy_context(struct glx_context *context)
 399 {
 400    struct drisw_context *pcp = (struct drisw_context *) context;
 401    struct drisw_screen *psc = (struct drisw_screen *) context->psc;
 402
 403    driReleaseDrawables(&pcp->base);
 404
 405    free((char *) context->extensions);
 406
 407    (*psc->core->destroyContext) (pcp->driContext);
 408
 409    free(pcp);
 410 }
 411
 412 static int
 413 drisw_bind_context(struct glx_context *context, struct glx_context *old,
 414                    GLXDrawable draw, GLXDrawable read)
 415 {
 416    struct drisw_context *pcp = (struct drisw_context *) context;
 417    struct drisw_screen *psc = (struct drisw_screen *) pcp->base.psc;
 418    struct drisw_drawable *pdraw, *pread;
 419
 420    pdraw = (struct drisw_drawable *) driFetchDrawable(context, draw);
 421    pread = (struct drisw_drawable *) driFetchDrawable(context, read);
 422
 423    driReleaseDrawables(&pcp->base);
 424
 425    if ((*psc->core->bindContext) (pcp->driContext,
 426                                   pdraw ? pdraw->driDrawable : NULL,
 427                                   pread ? pread->driDrawable : NULL))
 428       return Success;
 429
 430    return GLXBadContext;
 431 }
 432
 433 static void
 434 drisw_unbind_context(struct glx_context *context, struct glx_context *new)
 435 {
 436    struct drisw_context *pcp = (struct drisw_context *) context;
 437    struct drisw_screen *psc = (struct drisw_screen *) pcp->base.psc;
 438
 439    (*psc->core->unbindContext) (pcp->driContext);
 440 }
 441
 442 static void
 443 drisw_bind_tex_image(Display * dpy,
 444                     GLXDrawable drawable,
 445                     int buffer, const int *attrib_list)
 446 {
 447    struct glx_context *gc = __glXGetCurrentContext();
 448    struct drisw_context *pcp = (struct drisw_context *) gc;
 449    __GLXDRIdrawable *base = GetGLXDRIDrawable(dpy, drawable);
 450    struct drisw_drawable *pdraw = (struct drisw_drawable *) base;
 451    struct drisw_screen *psc;
 452
 453    __glXInitialize(dpy);
 454
 455    if (pdraw != NULL) {
 456       psc = (struct drisw_screen *) base->psc;
 457
 458       if (!psc->texBuffer)
 459          return;
 460
 461       if (psc->texBuffer->base.version >= 2 &&
 462         psc->texBuffer->setTexBuffer2 != NULL) {
 463               (*psc->texBuffer->setTexBuffer2) (pcp->driContext,
 464                                            pdraw->base.textureTarget,
 465                                            pdraw->base.textureFormat,
 466                                            pdraw->driDrawable);
 467       }
 468       else {
 469               (*psc->texBuffer->setTexBuffer) (pcp->driContext,
 470                                           pdraw->base.textureTarget,
 471                                           pdraw->driDrawable);
 472       }
 473    }
 474 }
 475
 476 static void
 477 drisw_release_tex_image(Display * dpy, GLXDrawable drawable, int buffer)
 478 {
 479    struct glx_context *gc = __glXGetCurrentContext();
 480    struct drisw_context *pcp = (struct drisw_context *) gc;
 481    __GLXDRIdrawable *base = GetGLXDRIDrawable(dpy, drawable);
 482    struct glx_display *dpyPriv = __glXInitialize(dpy);
 483    struct drisw_drawable *pdraw = (struct drisw_drawable *) base;
 484    struct drisw_screen *psc;
 485
 486    if (dpyPriv != NULL && pdraw != NULL) {
 487       psc = (struct drisw_screen *) base->psc;
 488
 489       if (!psc->texBuffer)
 490          return;
 491
 492       if (psc->texBuffer->base.version >= 3 &&
 493           psc->texBuffer->releaseTexBuffer != NULL) {
 494          (*psc->texBuffer->releaseTexBuffer) (pcp->driContext,
 495                                            pdraw->base.textureTarget,
 496                                            pdraw->driDrawable);
 497       }
 498    }
 499 }
 500
 501 static const struct glx_context_vtable drisw_context_vtable = {
 502    .destroy             = drisw_destroy_context,
 503    .bind                = drisw_bind_context,
 504    .unbind              = drisw_unbind_context,
 505    .wait_gl             = NULL,
 506    .wait_x              = NULL,
 507    .use_x_font          = DRI_glXUseXFont,
 508    .bind_tex_image      = drisw_bind_tex_image,
 509    .release_tex_image   = drisw_release_tex_image,
 510    .get_proc_address    = NULL,
 511 };
 512
 513 static struct glx_context *
 514 drisw_create_context(struct glx_screen *base,
 515                      struct glx_config *config_base,
 516                      struct glx_context *shareList, int renderType)
 517 {
 518    struct drisw_context *pcp, *pcp_shared;
 519    __GLXDRIconfigPrivate *config = (__GLXDRIconfigPrivate *) config_base;
 520    struct drisw_screen *psc = (struct drisw_screen *) base;
 521    __DRIcontext *shared = NULL;
 522
 523    if (!psc->base.driScreen)
 524       return NULL;
 525
 526    /* Check the renderType value */
 527    if (!validate_renderType_against_config(config_base, renderType))
 528        return NULL;
 529
 530    if (shareList) {
 531       /* If the shareList context is not a DRISW context, we cannot possibly
 532        * create a DRISW context that shares it.
 533        */
 534       if (shareList->vtable->destroy != drisw_destroy_context) {
 535          return NULL;
 536       }
 537
 538       pcp_shared = (struct drisw_context *) shareList;
 539       shared = pcp_shared->driContext;
 540    }
 541
 542    pcp = calloc(1, sizeof *pcp);
 543    if (pcp == NULL)
 544       return NULL;
 545
 546    if (!glx_context_init(&pcp->base, &psc->base, &config->base)) {
 547       free(pcp);
 548       return NULL;
 549    }
 550
 551    pcp->base.renderType = renderType;
 552
 553    pcp->driContext =
 554       (*psc->core->createNewContext) (psc->driScreen,
 555                                       config->driConfig, shared, pcp);
 556    if (pcp->driContext == NULL) {
 557       free(pcp);
 558       return NULL;
 559    }
 560
 561    pcp->base.vtable = &drisw_context_vtable;
 562
 563    return &pcp->base;
 564 }
 565
 566 static struct glx_context *
 567 drisw_create_context_attribs(struct glx_screen *base,
 568                              struct glx_config *config_base,
 569                              struct glx_context *shareList,
 570                              unsigned num_attribs,
 571                              const uint32_t *attribs,
 572                              unsigned *error)
 573 {
 574    struct drisw_context *pcp, *pcp_shared;
 575    __GLXDRIconfigPrivate *config = (__GLXDRIconfigPrivate *) config_base;
 576    struct drisw_screen *psc = (struct drisw_screen *) base;
 577    __DRIcontext *shared = NULL;
 578
 579    uint32_t minor_ver;
 580    uint32_t major_ver;
 581    uint32_t renderType;
 582    uint32_t flags;
 583    unsigned api;
 584    int reset;
 585    int release;
 586    uint32_t ctx_attribs[2 * 5];
 587    unsigned num_ctx_attribs = 0;
 588
 589    if (!psc->base.driScreen)
 590       return NULL;
 591
 592    if (psc->swrast->base.version < 3)
 593       return NULL;
 594
 595    /* Remap the GLX tokens to DRI2 tokens.
 596     */
 597    if (!dri2_convert_glx_attribs(num_attribs, attribs,
 598                                  &major_ver, &minor_ver, &renderType, &flags,
 599                                  &api, &reset, &release, error))
 600       return NULL;
 601
 602    /* Check the renderType value */
 603    if (!validate_renderType_against_config(config_base, renderType)) {
 604        return NULL;
 605    }
 606
 607    if (reset != __DRI_CTX_RESET_NO_NOTIFICATION)
 608       return NULL;
 609
 610    if (release != __DRI_CTX_RELEASE_BEHAVIOR_FLUSH &&
 611        release != __DRI_CTX_RELEASE_BEHAVIOR_NONE)
 612       return NULL;
 613
 614    if (shareList) {
 615       pcp_shared = (struct drisw_context *) shareList;
 616       shared = pcp_shared->driContext;
 617    }
 618
 619    pcp = calloc(1, sizeof *pcp);
 620    if (pcp == NULL)
 621       return NULL;
 622
 623    if (!glx_context_init(&pcp->base, &psc->base, config_base)) {
 624       free(pcp);
 625       return NULL;
 626    }
 627
 628    ctx_attribs[num_ctx_attribs++] = __DRI_CTX_ATTRIB_MAJOR_VERSION;
 629    ctx_attribs[num_ctx_attribs++] = major_ver;
 630    ctx_attribs[num_ctx_attribs++] = __DRI_CTX_ATTRIB_MINOR_VERSION;
 631    ctx_attribs[num_ctx_attribs++] = minor_ver;
 632    if (release != __DRI_CTX_RELEASE_BEHAVIOR_FLUSH) {
 633        ctx_attribs[num_ctx_attribs++] = __DRI_CTX_ATTRIB_RELEASE_BEHAVIOR;
 634        ctx_attribs[num_ctx_attribs++] = release;
 635    }
 636
 637    if (flags != 0) {
 638       ctx_attribs[num_ctx_attribs++] = __DRI_CTX_ATTRIB_FLAGS;
 639
 640       /* The current __DRI_CTX_FLAG_* values are identical to the
 641        * GLX_CONTEXT_*_BIT values.
 642        */
 643       ctx_attribs[num_ctx_attribs++] = flags;
 644    }
 645
 646    pcp->base.renderType = renderType;
 647
 648    pcp->driContext =
 649       (*psc->swrast->createContextAttribs) (psc->driScreen,
 650                                             api,
 651                                             config ? config->driConfig : 0,
 652                                             shared,
 653                                             num_ctx_attribs / 2,
 654                                             ctx_attribs,
 655                                             error,
 656                                             pcp);
 657    if (pcp->driContext == NULL) {
 658       free(pcp);
 659       return NULL;
 660    }
 661
 662    pcp->base.vtable = &drisw_context_vtable;
 663
 664    return &pcp->base;
 665 }
 666
 667 static void
 668 driswDestroyDrawable(__GLXDRIdrawable * pdraw)
 669 {
 670    struct drisw_drawable *pdp = (struct drisw_drawable *) pdraw;
 671    struct drisw_screen *psc = (struct drisw_screen *) pdp->base.psc;
 672
 673    (*psc->core->destroyDrawable) (pdp->driDrawable);
 674
 675    XDestroyDrawable(pdp, pdraw->psc->dpy, pdraw->drawable);
 676    free(pdp);
 677 }
 678
 679 static __GLXDRIdrawable *
 680 driswCreateDrawable(struct glx_screen *base, XID xDrawable,
 681                     GLXDrawable drawable, struct glx_config *modes)
 682 {
 683    struct drisw_drawable *pdp;
 684    __GLXDRIconfigPrivate *config = (__GLXDRIconfigPrivate *) modes;
 685    struct drisw_screen *psc = (struct drisw_screen *) base;
 686    Bool ret;
 687    const __DRIswrastExtension *swrast = psc->swrast;
 688
 689    pdp = calloc(1, sizeof(*pdp));
 690    if (!pdp)
 691       return NULL;
 692
 693    pdp->base.xDrawable = xDrawable;
 694    pdp->base.drawable = drawable;
 695    pdp->base.psc = &psc->base;
 696
 697    ret = XCreateGCs(pdp, psc->base.dpy, xDrawable, modes->visualID);
 698    if (!ret) {
 699       free(pdp);
 700       return NULL;
 701    }
 702
 703    /* Create a new drawable */
 704    pdp->driDrawable =
 705       (*swrast->createNewDrawable) (psc->driScreen, config->driConfig, pdp);
 706
 707    if (!pdp->driDrawable) {
 708       XDestroyDrawable(pdp, psc->base.dpy, xDrawable);
 709       free(pdp);
 710       return NULL;
 711    }
 712
 713    pdp->base.destroyDrawable = driswDestroyDrawable;
 714
 715    return &pdp->base;
 716 }
 717
 718 static int64_t
 719 driswSwapBuffers(__GLXDRIdrawable * pdraw,
 720                  int64_t target_msc, int64_t divisor, int64_t remainder,
 721                  Bool flush)
 722 {
 723    struct drisw_drawable *pdp = (struct drisw_drawable *) pdraw;
 724    struct drisw_screen *psc = (struct drisw_screen *) pdp->base.psc;
 725
 726    (void) target_msc;
 727    (void) divisor;
 728    (void) remainder;
 729
 730    if (flush) {
 731       glFlush();
 732    }
 733
 734    (*psc->core->swapBuffers) (pdp->driDrawable);
 735
 736    return 0;
 737 }
 738
 739 static void
 740 driswCopySubBuffer(__GLXDRIdrawable * pdraw,
 741                    int x, int y, int width, int height, Bool flush)
 742 {
 743    struct drisw_drawable *pdp = (struct drisw_drawable *) pdraw;
 744    struct drisw_screen *psc = (struct drisw_screen *) pdp->base.psc;
 745
 746    if (flush) {
 747       glFlush();
 748    }
 749
 750    (*psc->copySubBuffer->copySubBuffer) (pdp->driDrawable,
 751                                             x, y, width, height);
 752 }
 753
 754 static void
 755 driswDestroyScreen(struct glx_screen *base)
 756 {
 757    struct drisw_screen *psc = (struct drisw_screen *) base;
 758
 759    /* Free the direct rendering per screen data */
 760    (*psc->core->destroyScreen) (psc->driScreen);
 761    driDestroyConfigs(psc->driver_configs);
 762    psc->driScreen = NULL;
 763    if (psc->driver)
 764       dlclose(psc->driver);
 765    free(psc);
 766 }
 767
 768 #define SWRAST_DRIVER_NAME "swrast"
 769
 770 static const struct glx_screen_vtable drisw_screen_vtable = {
 771    .create_context         = drisw_create_context,
 772    .create_context_attribs = drisw_create_context_attribs,
 773    .query_renderer_integer = drisw_query_renderer_integer,
 774    .query_renderer_string  = drisw_query_renderer_string,
 775 };
 776
 777 static void
 778 driswBindExtensions(struct drisw_screen *psc, const __DRIextension **extensions)
 779 {
 780    int i;
 781
 782    __glXEnableDirectExtension(&psc->base, "GLX_SGI_make_current_read");
 783
 784    if (psc->swrast->base.version >= 3) {
 785       __glXEnableDirectExtension(&psc->base, "GLX_ARB_create_context");
 786       __glXEnableDirectExtension(&psc->base, "GLX_ARB_create_context_profile");
 787
 788       /* DRISW version >= 2 implies support for OpenGL ES.
 789        */
 790       __glXEnableDirectExtension(&psc->base,
 791                                  "GLX_EXT_create_context_es_profile");
 792       __glXEnableDirectExtension(&psc->base,
 793                                  "GLX_EXT_create_context_es2_profile");
 794    }
 795
 796    if (psc->copySubBuffer)
 797       __glXEnableDirectExtension(&psc->base, "GLX_MESA_copy_sub_buffer");
 798
 799    /* FIXME: Figure out what other extensions can be ported here from dri2. */
 800    for (i = 0; extensions[i]; i++) {
 801       if ((strcmp(extensions[i]->name, __DRI_TEX_BUFFER) == 0)) {
 802          psc->texBuffer = (__DRItexBufferExtension *) extensions[i];
 803          __glXEnableDirectExtension(&psc->base, "GLX_EXT_texture_from_pixmap");
 804       }
 805       /* DRISW version 3 is also required because GLX_MESA_query_renderer
 806        * requires GLX_ARB_create_context_profile.
 807        */
 808       if (psc->swrast->base.version >= 3
 809           && strcmp(extensions[i]->name, __DRI2_RENDERER_QUERY) == 0) {
 810          psc->rendererQuery = (__DRI2rendererQueryExtension *) extensions[i];
 811          __glXEnableDirectExtension(&psc->base, "GLX_MESA_query_renderer");
 812       }
 813       if (strcmp(extensions[i]->name, __DRI2_FLUSH_CONTROL) == 0) {
 814           __glXEnableDirectExtension(&psc->base,
 815                                      "GLX_ARB_context_flush_control");
 816       }
 817    }
 818 }
 819
 820 static int
 821 check_xshm(Display *dpy)
 822 {
 823    int ignore;
 824
 825    return XQueryExtension(dpy, "MIT-SHM", &xshm_opcode, &ignore, &ignore);
 826 }
 827
 828 static struct glx_screen *
 829 driswCreateScreen(int screen, struct glx_display *priv)
 830 {
 831    __GLXDRIscreen *psp;
 832    const __DRIconfig **driver_configs;
 833    const __DRIextension **extensions;
 834    struct drisw_screen *psc;
 835    struct glx_config *configs = NULL, *visuals = NULL;
 836    int i;
 837    const __DRIextension **loader_extensions_local;
 838
 839    psc = calloc(1, sizeof *psc);
 840    if (psc == NULL)
 841       return NULL;
 842
 843    if (!glx_screen_init(&psc->base, screen, priv)) {
 844       free(psc);
 845       return NULL;
 846    }
 847
 848    extensions = driOpenDriver(SWRAST_DRIVER_NAME, &psc->driver);
 849    if (extensions == NULL)
 850       goto handle_error;
 851
 852    if (!check_xshm(psc->base.dpy))
 853       loader_extensions_local = loader_extensions_noshm;
 854    else
 855       loader_extensions_local = loader_extensions_shm;
 856
 857    for (i = 0; extensions[i]; i++) {
 858       if (strcmp(extensions[i]->name, __DRI_CORE) == 0)
 859          psc->core = (__DRIcoreExtension *) extensions[i];
 860       if (strcmp(extensions[i]->name, __DRI_SWRAST) == 0)
 861          psc->swrast = (__DRIswrastExtension *) extensions[i];
 862       if (strcmp(extensions[i]->name, __DRI_COPY_SUB_BUFFER) == 0)
 863          psc->copySubBuffer = (__DRIcopySubBufferExtension *) extensions[i];
 864    }
 865
 866    if (psc->core == NULL || psc->swrast == NULL) {
 867       ErrorMessageF("core dri extension not found\n");
 868       goto handle_error;
 869    }
 870
 871    if (psc->swrast->base.version >= 4) {
 872       psc->driScreen =
 873          psc->swrast->createNewScreen2(screen, loader_extensions_local,
 874                                        extensions,
 875                                        &driver_configs, psc);
 876    } else {
 877       psc->driScreen =
 878          psc->swrast->createNewScreen(screen, loader_extensions_local,
 879                                       &driver_configs, psc);
 880    }
 881    if (psc->driScreen == NULL) {
 882       ErrorMessageF("failed to create dri screen\n");
 883       goto handle_error;
 884    }
 885
 886    extensions = psc->core->getExtensions(psc->driScreen);
 887    driswBindExtensions(psc, extensions);
 888
 889    configs = driConvertConfigs(psc->core, psc->base.configs, driver_configs);
 890    visuals = driConvertConfigs(psc->core, psc->base.visuals, driver_configs);
 891
 892    if (!configs || !visuals) {
 893        ErrorMessageF("No matching fbConfigs or visuals found\n");
 894        goto handle_error;
 895    }
 896
 897    glx_config_destroy_list(psc->base.configs);
 898    psc->base.configs = configs;
 899    glx_config_destroy_list(psc->base.visuals);
 900    psc->base.visuals = visuals;
 901
 902    psc->driver_configs = driver_configs;
 903
 904    psc->base.vtable = &drisw_screen_vtable;
 905    psp = &psc->vtable;
 906    psc->base.driScreen = psp;
 907    psp->destroyScreen = driswDestroyScreen;
 908    psp->createDrawable = driswCreateDrawable;
 909    psp->swapBuffers = driswSwapBuffers;
 910
 911    if (psc->copySubBuffer)
 912       psp->copySubBuffer = driswCopySubBuffer;
 913
 914    return &psc->base;
 915
 916  handle_error:
 917    if (configs)
 918        glx_config_destroy_list(configs);
 919    if (visuals)
 920        glx_config_destroy_list(visuals);
 921    if (psc->driScreen)
 922        psc->core->destroyScreen(psc->driScreen);
 923    psc->driScreen = NULL;
 924
 925    if (psc->driver)
 926       dlclose(psc->driver);
 927    glx_screen_cleanup(&psc->base);
 928    free(psc);
 929
 930    CriticalErrorMessageF("failed to load driver: %s\n", SWRAST_DRIVER_NAME);
 931
 932    return NULL;
 933 }
 934
 935 /* Called from __glXFreeDisplayPrivate.
 936  */
 937 static void
 938 driswDestroyDisplay(__GLXDRIdisplay * dpy)
 939 {
 940    free(dpy);
 941 }
 942
 943 /*
 944  * Allocate, initialize and return a __DRIdisplayPrivate object.
 945  * This is called from __glXInitialize() when we are given a new
 946  * display pointer.
 947  */
 948 _X_HIDDEN __GLXDRIdisplay *
 949 driswCreateDisplay(Display * dpy)
 950 {
 951    struct drisw_display *pdpyp;
 952
 953    pdpyp = malloc(sizeof *pdpyp);
 954    if (pdpyp == NULL)
 955       return NULL;
 956
 957    pdpyp->base.destroyDisplay = driswDestroyDisplay;
 958    pdpyp->base.createScreen = driswCreateScreen;
 959
 960    return &pdpyp->base;
 961 }
 962
 963 #endif /* GLX_DIRECT_RENDERING */