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 int xshm_error = 0;
  35 static int xshm_opcode = -1;
  36
  37 /**
  38  * Catches potential Xlib errors.
  39  */
  40 static int
  41 handle_xerror(Display *dpy, XErrorEvent *event)
  42 {
  43    (void) dpy;
  44
  45    assert(xshm_opcode != -1);
  46    if (event->request_code != xshm_opcode)
  47       return 0;
  48
  49    xshm_error = event->error_code;
  50    return 0;
  51 }
  52
  53 static Bool
  54 XCreateDrawable(struct drisw_drawable * pdp, int shmid, Display * dpy)
  55 {
  56    if (pdp->ximage) {
  57       XDestroyImage(pdp->ximage);
  58       pdp->ximage = NULL;
  59       if ((pdp->shminfo.shmid > 0) && (shmid != pdp->shminfo.shmid))
  60          XShmDetach(dpy, &pdp->shminfo);
  61    }
  62
  63    if (!xshm_error && shmid >= 0) {
  64       pdp->shminfo.shmid = shmid;
  65       pdp->ximage = XShmCreateImage(dpy,
  66                                     NULL,
  67                                     pdp->xDepth,
  68                                     ZPixmap,              /* format */
  69                                     NULL,                 /* data */
  70                                     &pdp->shminfo,        /* shminfo */
  71                                     0, 0);                /* width, height */
  72       if (pdp->ximage != NULL) {
  73          int (*old_handler)(Display *, XErrorEvent *);
  74
  75          /* dispatch pending errors */
  76          XSync(dpy, False);
  77
  78          old_handler = XSetErrorHandler(handle_xerror);
  79          /* This may trigger the X protocol error we're ready to catch: */
  80          XShmAttach(dpy, &pdp->shminfo);
  81          XSync(dpy, False);
  82
  83          if (xshm_error) {
  84          /* we are on a remote display, this error is normal, don't print it */
  85             XDestroyImage(pdp->ximage);
  86             pdp->ximage = NULL;
  87          }
  88
  89          (void) XSetErrorHandler(old_handler);
  90       }
  91    }
  92
  93    if (pdp->ximage == NULL) {
  94       pdp->shminfo.shmid = -1;
  95       pdp->ximage = XCreateImage(dpy,
  96                                  NULL,
  97                                  pdp->xDepth,
  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   /**
 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    if (pdp->ximage)
 119       XDestroyImage(pdp->ximage);
 120
 121    if (pdp->shminfo.shmid > 0)
 122       XShmDetach(dpy, &pdp->shminfo);
 123
 124    XFreeGC(dpy, pdp->gc);
 125 }
 126
 127 /**
 128  * swrast loader functions
 129  */
 130
 131 static void
 132 swrastGetDrawableInfo(__DRIdrawable * draw,
 133                       int *x, int *y, int *w, int *h,
 134                       void *loaderPrivate)
 135 {
 136    struct drisw_drawable *pdp = loaderPrivate;
 137    __GLXDRIdrawable *pdraw = &(pdp->base);
 138    Display *dpy = pdraw->psc->dpy;
 139    Drawable drawable;
 140
 141    Window root;
 142    unsigned uw, uh, bw, depth;
 143
 144    drawable = pdraw->xDrawable;
 145
 146    XGetGeometry(dpy, drawable, &root, x, y, &uw, &uh, &bw, &depth);
 147    *w = uw;
 148    *h = uh;
 149 }
 150
 151 /**
 152  * Align renderbuffer pitch.
 153  *
 154  * This should be chosen by the driver and the loader (libGL, xserver/glx)
 155  * should use the driver provided pitch.
 156  *
 157  * It seems that the xorg loader (that is the xserver loading swrast_dri for
 158  * indirect rendering, not client-side libGL) requires that the pitch is
 159  * exactly the image width padded to 32 bits. XXX
 160  *
 161  * The above restriction can probably be overcome by using ScratchPixmap and
 162  * CopyArea in the xserver, similar to ShmPutImage, and setting the width of
 163  * the scratch pixmap to 'pitch / cpp'.
 164  */
 165 static inline int
 166 bytes_per_line(unsigned pitch_bits, unsigned mul)
 167 {
 168    unsigned mask = mul - 1;
 169
 170    return ((pitch_bits + mask) & ~mask) / 8;
 171 }
 172
 173 static void
 174 swrastXPutImage(__DRIdrawable * draw, int op,
 175                 int srcx, int srcy, int x, int y,
 176                 int w, int h, int stride,
 177                 int shmid, char *data, void *loaderPrivate)
 178 {
 179    struct drisw_drawable *pdp = loaderPrivate;
 180    __GLXDRIdrawable *pdraw = &(pdp->base);
 181    Display *dpy = pdraw->psc->dpy;
 182    Drawable drawable;
 183    XImage *ximage;
 184    GC gc = pdp->gc;
 185
 186    if (!pdp->ximage || shmid != pdp->shminfo.shmid) {
 187       if (!XCreateDrawable(pdp, shmid, dpy))
 188          return;
 189    }
 190
 191    drawable = pdraw->xDrawable;
 192    ximage = pdp->ximage;
 193    ximage->bytes_per_line = stride ? stride : bytes_per_line(w * ximage->bits_per_pixel, 32);
 194    ximage->data = data;
 195
 196    if (pdp->shminfo.shmid >= 0) {
 197       ximage->width = ximage->bytes_per_line / ((ximage->bits_per_pixel + 7)/ 8);
 198       ximage->height = h;
 199       XShmPutImage(dpy, drawable, gc, ximage, srcx, srcy, x, y, w, h, False);
 200       XSync(dpy, False);
 201    } else {
 202       ximage->width = w;
 203       ximage->height = h;
 204       XPutImage(dpy, drawable, gc, ximage, srcx, srcy, x, y, w, h);
 205    }
 206    ximage->data = NULL;
 207 }
 208
 209 static void
 210 swrastPutImageShm(__DRIdrawable * draw, int op,
 211                   int x, int y, int w, int h, int stride,
 212                   int shmid, char *shmaddr, unsigned offset,
 213                   void *loaderPrivate)
 214 {
 215    struct drisw_drawable *pdp = loaderPrivate;
 216
 217    pdp->shminfo.shmaddr = shmaddr;
 218    swrastXPutImage(draw, op, 0, 0, x, y, w, h, stride, shmid,
 219                    shmaddr + offset, loaderPrivate);
 220 }
 221
 222 static void
 223 swrastPutImageShm2(__DRIdrawable * draw, int op,
 224                    int x, int y,
 225                    int w, int h, int stride,
 226                    int shmid, char *shmaddr, unsigned offset,
 227                    void *loaderPrivate)
 228 {
 229    struct drisw_drawable *pdp = loaderPrivate;
 230
 231    pdp->shminfo.shmaddr = shmaddr;
 232    swrastXPutImage(draw, op, x, 0, x, y, w, h, stride, shmid,
 233                    shmaddr + offset, loaderPrivate);
 234 }
 235
 236 static void
 237 swrastPutImage2(__DRIdrawable * draw, int op,
 238                 int x, int y, int w, int h, int stride,
 239                 char *data, void *loaderPrivate)
 240 {
 241    swrastXPutImage(draw, op, 0, 0, x, y, w, h, stride, -1,
 242                    data, loaderPrivate);
 243 }
 244
 245 static void
 246 swrastPutImage(__DRIdrawable * draw, int op,
 247                int x, int y, int w, int h,
 248                char *data, void *loaderPrivate)
 249 {
 250    swrastXPutImage(draw, op, 0, 0, x, y, w, h, 0, -1,
 251                    data, loaderPrivate);
 252 }
 253
 254 static void
 255 swrastGetImage2(__DRIdrawable * read,
 256                 int x, int y, int w, int h, int stride,
 257                 char *data, void *loaderPrivate)
 258 {
 259    struct drisw_drawable *prp = loaderPrivate;
 260    __GLXDRIdrawable *pread = &(prp->base);
 261    Display *dpy = pread->psc->dpy;
 262    Drawable readable;
 263    XImage *ximage;
 264
 265    if (!prp->ximage || prp->shminfo.shmid >= 0) {
 266       if (!XCreateDrawable(prp, -1, dpy))
 267          return;
 268    }
 269
 270    readable = pread->xDrawable;
 271
 272    ximage = prp->ximage;
 273    ximage->data = data;
 274    ximage->width = w;
 275    ximage->height = h;
 276    ximage->bytes_per_line = stride ? stride : bytes_per_line(w * ximage->bits_per_pixel, 32);
 277
 278    XGetSubImage(dpy, readable, x, y, w, h, ~0L, ZPixmap, ximage, 0, 0);
 279
 280    ximage->data = NULL;
 281 }
 282
 283 static void
 284 swrastGetImage(__DRIdrawable * read,
 285                int x, int y, int w, int h,
 286                char *data, void *loaderPrivate)
 287 {
 288    swrastGetImage2(read, x, y, w, h, 0, data, loaderPrivate);
 289 }
 290
 291 static GLboolean
 292 swrastGetImageShm2(__DRIdrawable * read,
 293                    int x, int y, int w, int h,
 294                    int shmid, void *loaderPrivate)
 295 {
 296    struct drisw_drawable *prp = loaderPrivate;
 297    __GLXDRIdrawable *pread = &(prp->base);
 298    Display *dpy = pread->psc->dpy;
 299    Drawable readable;
 300    XImage *ximage;
 301
 302    if (!prp->ximage || shmid != prp->shminfo.shmid) {
 303       if (!XCreateDrawable(prp, shmid, dpy))
 304          return GL_FALSE;
 305    }
 306
 307    if (prp->shminfo.shmid == -1)
 308       return GL_FALSE;
 309    readable = pread->xDrawable;
 310
 311    ximage = prp->ximage;
 312    ximage->data = prp->shminfo.shmaddr; /* no offset */
 313    ximage->width = w;
 314    ximage->height = h;
 315    ximage->bytes_per_line = bytes_per_line(w * ximage->bits_per_pixel, 32);
 316
 317    XShmGetImage(dpy, readable, ximage, x, y, ~0L);
 318    return GL_TRUE;
 319 }
 320
 321 static void
 322 swrastGetImageShm(__DRIdrawable * read,
 323                   int x, int y, int w, int h,
 324                   int shmid, void *loaderPrivate)
 325 {
 326    swrastGetImageShm2(read, x, y, w, h, shmid, loaderPrivate);
 327 }
 328
 329 static const __DRIswrastLoaderExtension swrastLoaderExtension_shm = {
 330    .base = {__DRI_SWRAST_LOADER, 6 },
 331
 332    .getDrawableInfo     = swrastGetDrawableInfo,
 333    .putImage            = swrastPutImage,
 334    .getImage            = swrastGetImage,
 335    .putImage2           = swrastPutImage2,
 336    .getImage2           = swrastGetImage2,
 337    .putImageShm         = swrastPutImageShm,
 338    .getImageShm         = swrastGetImageShm,
 339    .putImageShm2        = swrastPutImageShm2,
 340    .getImageShm2        = swrastGetImageShm2,
 341 };
 342
 343 static const __DRIextension *loader_extensions_shm[] = {
 344    &swrastLoaderExtension_shm.base,
 345    NULL
 346 };
 347
 348 static const __DRIswrastLoaderExtension swrastLoaderExtension = {
 349    .base = {__DRI_SWRAST_LOADER, 3 },
 350
 351    .getDrawableInfo     = swrastGetDrawableInfo,
 352    .putImage            = swrastPutImage,
 353    .getImage            = swrastGetImage,
 354    .putImage2           = swrastPutImage2,
 355    .getImage2           = swrastGetImage2,
 356 };
 357
 358 static const __DRIextension *loader_extensions_noshm[] = {
 359    &swrastLoaderExtension.base,
 360    NULL
 361 };
 362
 363 /**
 364  * GLXDRI functions
 365  */
 366
 367 static void
 368 drisw_destroy_context(struct glx_context *context)
 369 {
 370    struct drisw_context *pcp = (struct drisw_context *) context;
 371    struct drisw_screen *psc = (struct drisw_screen *) context->psc;
 372
 373    driReleaseDrawables(&pcp->base);
 374
 375    free((char *) context->extensions);
 376
 377    (*psc->core->destroyContext) (pcp->driContext);
 378
 379    free(pcp);
 380 }
 381
 382 static int
 383 drisw_bind_context(struct glx_context *context, struct glx_context *old,
 384                    GLXDrawable draw, GLXDrawable read)
 385 {
 386    struct drisw_context *pcp = (struct drisw_context *) context;
 387    struct drisw_screen *psc = (struct drisw_screen *) pcp->base.psc;
 388    struct drisw_drawable *pdraw, *pread;
 389
 390    pdraw = (struct drisw_drawable *) driFetchDrawable(context, draw);
 391    pread = (struct drisw_drawable *) driFetchDrawable(context, read);
 392
 393    driReleaseDrawables(&pcp->base);
 394
 395    if ((*psc->core->bindContext) (pcp->driContext,
 396                                   pdraw ? pdraw->driDrawable : NULL,
 397                                   pread ? pread->driDrawable : NULL))
 398       return Success;
 399
 400    return GLXBadContext;
 401 }
 402
 403 static void
 404 drisw_unbind_context(struct glx_context *context, struct glx_context *new)
 405 {
 406    struct drisw_context *pcp = (struct drisw_context *) context;
 407    struct drisw_screen *psc = (struct drisw_screen *) pcp->base.psc;
 408
 409    (*psc->core->unbindContext) (pcp->driContext);
 410 }
 411
 412 static void
 413 drisw_bind_tex_image(Display * dpy,
 414                     GLXDrawable drawable,
 415                     int buffer, const int *attrib_list)
 416 {
 417    struct glx_context *gc = __glXGetCurrentContext();
 418    struct drisw_context *pcp = (struct drisw_context *) gc;
 419    __GLXDRIdrawable *base = GetGLXDRIDrawable(dpy, drawable);
 420    struct drisw_drawable *pdraw = (struct drisw_drawable *) base;
 421    struct drisw_screen *psc;
 422
 423    __glXInitialize(dpy);
 424
 425    if (pdraw != NULL) {
 426       psc = (struct drisw_screen *) base->psc;
 427
 428       if (!psc->texBuffer)
 429          return;
 430
 431       if (psc->texBuffer->base.version >= 2 &&
 432         psc->texBuffer->setTexBuffer2 != NULL) {
 433               (*psc->texBuffer->setTexBuffer2) (pcp->driContext,
 434                                            pdraw->base.textureTarget,
 435                                            pdraw->base.textureFormat,
 436                                            pdraw->driDrawable);
 437       }
 438       else {
 439               (*psc->texBuffer->setTexBuffer) (pcp->driContext,
 440                                           pdraw->base.textureTarget,
 441                                           pdraw->driDrawable);
 442       }
 443    }
 444 }
 445
 446 static void
 447 drisw_release_tex_image(Display * dpy, GLXDrawable drawable, int buffer)
 448 {
 449    struct glx_context *gc = __glXGetCurrentContext();
 450    struct drisw_context *pcp = (struct drisw_context *) gc;
 451    __GLXDRIdrawable *base = GetGLXDRIDrawable(dpy, drawable);
 452    struct glx_display *dpyPriv = __glXInitialize(dpy);
 453    struct drisw_drawable *pdraw = (struct drisw_drawable *) base;
 454    struct drisw_screen *psc;
 455
 456    if (dpyPriv != NULL && pdraw != NULL) {
 457       psc = (struct drisw_screen *) base->psc;
 458
 459       if (!psc->texBuffer)
 460          return;
 461
 462       if (psc->texBuffer->base.version >= 3 &&
 463           psc->texBuffer->releaseTexBuffer != NULL) {
 464          (*psc->texBuffer->releaseTexBuffer) (pcp->driContext,
 465                                            pdraw->base.textureTarget,
 466                                            pdraw->driDrawable);
 467       }
 468    }
 469 }
 470
 471 static const struct glx_context_vtable drisw_context_vtable = {
 472    .destroy             = drisw_destroy_context,
 473    .bind                = drisw_bind_context,
 474    .unbind              = drisw_unbind_context,
 475    .wait_gl             = NULL,
 476    .wait_x              = NULL,
 477    .use_x_font          = DRI_glXUseXFont,
 478    .bind_tex_image      = drisw_bind_tex_image,
 479    .release_tex_image   = drisw_release_tex_image,
 480    .get_proc_address    = NULL,
 481 };
 482
 483 static struct glx_context *
 484 drisw_create_context(struct glx_screen *base,
 485                      struct glx_config *config_base,
 486                      struct glx_context *shareList, int renderType)
 487 {
 488    struct drisw_context *pcp, *pcp_shared;
 489    __GLXDRIconfigPrivate *config = (__GLXDRIconfigPrivate *) config_base;
 490    struct drisw_screen *psc = (struct drisw_screen *) base;
 491    __DRIcontext *shared = NULL;
 492
 493    if (!psc->base.driScreen)
 494       return NULL;
 495
 496    /* Check the renderType value */
 497    if (!validate_renderType_against_config(config_base, renderType))
 498        return NULL;
 499
 500    if (shareList) {
 501       /* If the shareList context is not a DRISW context, we cannot possibly
 502        * create a DRISW context that shares it.
 503        */
 504       if (shareList->vtable->destroy != drisw_destroy_context) {
 505          return NULL;
 506       }
 507
 508       pcp_shared = (struct drisw_context *) shareList;
 509       shared = pcp_shared->driContext;
 510    }
 511
 512    pcp = calloc(1, sizeof *pcp);
 513    if (pcp == NULL)
 514       return NULL;
 515
 516    if (!glx_context_init(&pcp->base, &psc->base, &config->base)) {
 517       free(pcp);
 518       return NULL;
 519    }
 520
 521    pcp->base.renderType = renderType;
 522
 523    pcp->driContext =
 524       (*psc->core->createNewContext) (psc->driScreen,
 525                                       config->driConfig, shared, pcp);
 526    if (pcp->driContext == NULL) {
 527       free(pcp);
 528       return NULL;
 529    }
 530
 531    pcp->base.vtable = &drisw_context_vtable;
 532
 533    return &pcp->base;
 534 }
 535
 536 static struct glx_context *
 537 drisw_create_context_attribs(struct glx_screen *base,
 538                              struct glx_config *config_base,
 539                              struct glx_context *shareList,
 540                              unsigned num_attribs,
 541                              const uint32_t *attribs,
 542                              unsigned *error)
 543 {
 544    struct drisw_context *pcp, *pcp_shared;
 545    __GLXDRIconfigPrivate *config = (__GLXDRIconfigPrivate *) config_base;
 546    struct drisw_screen *psc = (struct drisw_screen *) base;
 547    __DRIcontext *shared = NULL;
 548
 549    uint32_t minor_ver;
 550    uint32_t major_ver;
 551    uint32_t renderType;
 552    uint32_t flags;
 553    unsigned api;
 554    int reset;
 555    int release;
 556    uint32_t ctx_attribs[2 * 5];
 557    unsigned num_ctx_attribs = 0;
 558
 559    if (!psc->base.driScreen)
 560       return NULL;
 561
 562    if (psc->swrast->base.version < 3)
 563       return NULL;
 564
 565    /* Remap the GLX tokens to DRI2 tokens.
 566     */
 567    if (!dri2_convert_glx_attribs(num_attribs, attribs,
 568                                  &major_ver, &minor_ver, &renderType, &flags,
 569                                  &api, &reset, &release, error))
 570       return NULL;
 571
 572    if (!dri2_check_no_error(flags, shareList, major_ver, error))
 573       return NULL;
 574
 575    /* Check the renderType value */
 576    if (!validate_renderType_against_config(config_base, renderType)) {
 577        return NULL;
 578    }
 579
 580    if (reset != __DRI_CTX_RESET_NO_NOTIFICATION)
 581       return NULL;
 582
 583    if (release != __DRI_CTX_RELEASE_BEHAVIOR_FLUSH &&
 584        release != __DRI_CTX_RELEASE_BEHAVIOR_NONE)
 585       return NULL;
 586
 587    if (shareList) {
 588       pcp_shared = (struct drisw_context *) shareList;
 589       shared = pcp_shared->driContext;
 590    }
 591
 592    pcp = calloc(1, sizeof *pcp);
 593    if (pcp == NULL)
 594       return NULL;
 595
 596    if (!glx_context_init(&pcp->base, &psc->base, config_base)) {
 597       free(pcp);
 598       return NULL;
 599    }
 600
 601    ctx_attribs[num_ctx_attribs++] = __DRI_CTX_ATTRIB_MAJOR_VERSION;
 602    ctx_attribs[num_ctx_attribs++] = major_ver;
 603    ctx_attribs[num_ctx_attribs++] = __DRI_CTX_ATTRIB_MINOR_VERSION;
 604    ctx_attribs[num_ctx_attribs++] = minor_ver;
 605    if (release != __DRI_CTX_RELEASE_BEHAVIOR_FLUSH) {
 606        ctx_attribs[num_ctx_attribs++] = __DRI_CTX_ATTRIB_RELEASE_BEHAVIOR;
 607        ctx_attribs[num_ctx_attribs++] = release;
 608    }
 609
 610    if (flags != 0) {
 611       ctx_attribs[num_ctx_attribs++] = __DRI_CTX_ATTRIB_FLAGS;
 612
 613       /* The current __DRI_CTX_FLAG_* values are identical to the
 614        * GLX_CONTEXT_*_BIT values.
 615        */
 616       ctx_attribs[num_ctx_attribs++] = flags;
 617
 618       if (flags & __DRI_CTX_FLAG_NO_ERROR)
 619          pcp->base.noError = GL_TRUE;
 620    }
 621
 622    pcp->base.renderType = renderType;
 623
 624    pcp->driContext =
 625       (*psc->swrast->createContextAttribs) (psc->driScreen,
 626                                             api,
 627                                             config ? config->driConfig : 0,
 628                                             shared,
 629                                             num_ctx_attribs / 2,
 630                                             ctx_attribs,
 631                                             error,
 632                                             pcp);
 633    if (pcp->driContext == NULL) {
 634       free(pcp);
 635       return NULL;
 636    }
 637
 638    pcp->base.vtable = &drisw_context_vtable;
 639
 640    return &pcp->base;
 641 }
 642
 643 static void
 644 driswDestroyDrawable(__GLXDRIdrawable * pdraw)
 645 {
 646    struct drisw_drawable *pdp = (struct drisw_drawable *) pdraw;
 647    struct drisw_screen *psc = (struct drisw_screen *) pdp->base.psc;
 648
 649    (*psc->core->destroyDrawable) (pdp->driDrawable);
 650
 651    XDestroyDrawable(pdp, pdraw->psc->dpy, pdraw->drawable);
 652    free(pdp);
 653 }
 654
 655 static __GLXDRIdrawable *
 656 driswCreateDrawable(struct glx_screen *base, XID xDrawable,
 657                     GLXDrawable drawable, struct glx_config *modes)
 658 {
 659    struct drisw_drawable *pdp;
 660    __GLXDRIconfigPrivate *config = (__GLXDRIconfigPrivate *) modes;
 661    struct drisw_screen *psc = (struct drisw_screen *) base;
 662    const __DRIswrastExtension *swrast = psc->swrast;
 663    Display *dpy = psc->base.dpy;
 664
 665    pdp = calloc(1, sizeof(*pdp));
 666    if (!pdp)
 667       return NULL;
 668
 669    pdp->base.xDrawable = xDrawable;
 670    pdp->base.drawable = drawable;
 671    pdp->base.psc = &psc->base;
 672    pdp->config = modes;
 673    pdp->gc = XCreateGC(dpy, xDrawable, 0, NULL);
 674    pdp->xDepth = 0;
 675
 676    /* Use the visual depth, if this fbconfig corresponds to a visual */
 677    if (pdp->config->visualID != 0) {
 678       int matches = 0;
 679       XVisualInfo *visinfo, template;
 680
 681       template.visualid = pdp->config->visualID;
 682       template.screen = pdp->config->screen;
 683       visinfo = XGetVisualInfo(dpy, VisualIDMask | VisualScreenMask,
 684                                &template, &matches);
 685
 686       if (visinfo && matches) {
 687          pdp->xDepth = visinfo->depth;
 688          XFree(visinfo);
 689       }
 690    }
 691
 692    /* Otherwise, or if XGetVisualInfo failed, ask the server */
 693    if (pdp->xDepth == 0) {
 694       Window root;
 695       int x, y;
 696       unsigned uw, uh, bw, depth;
 697
 698       XGetGeometry(dpy, xDrawable, &root, &x, &y, &uw, &uh, &bw, &depth);
 699       pdp->xDepth = depth;
 700    }
 701
 702    /* Create a new drawable */
 703    pdp->driDrawable =
 704       (*swrast->createNewDrawable) (psc->driScreen, config->driConfig, pdp);
 705
 706    if (!pdp->driDrawable) {
 707       XDestroyDrawable(pdp, psc->base.dpy, xDrawable);
 708       free(pdp);
 709       return NULL;
 710    }
 711
 712    pdp->base.destroyDrawable = driswDestroyDrawable;
 713
 714    return &pdp->base;
 715 }
 716
 717 static int64_t
 718 driswSwapBuffers(__GLXDRIdrawable * pdraw,
 719                  int64_t target_msc, int64_t divisor, int64_t remainder,
 720                  Bool flush)
 721 {
 722    struct drisw_drawable *pdp = (struct drisw_drawable *) pdraw;
 723    struct drisw_screen *psc = (struct drisw_screen *) pdp->base.psc;
 724
 725    (void) target_msc;
 726    (void) divisor;
 727    (void) remainder;
 728
 729    if (flush) {
 730       glFlush();
 731    }
 732
 733    (*psc->core->swapBuffers) (pdp->driDrawable);
 734
 735    return 0;
 736 }
 737
 738 static void
 739 driswCopySubBuffer(__GLXDRIdrawable * pdraw,
 740                    int x, int y, int width, int height, Bool flush)
 741 {
 742    struct drisw_drawable *pdp = (struct drisw_drawable *) pdraw;
 743    struct drisw_screen *psc = (struct drisw_screen *) pdp->base.psc;
 744
 745    if (flush) {
 746       glFlush();
 747    }
 748
 749    (*psc->copySubBuffer->copySubBuffer) (pdp->driDrawable,
 750                                             x, y, width, height);
 751 }
 752
 753 static void
 754 driswDestroyScreen(struct glx_screen *base)
 755 {
 756    struct drisw_screen *psc = (struct drisw_screen *) base;
 757
 758    /* Free the direct rendering per screen data */
 759    (*psc->core->destroyScreen) (psc->driScreen);
 760    driDestroyConfigs(psc->driver_configs);
 761    psc->driScreen = NULL;
 762    if (psc->driver)
 763       dlclose(psc->driver);
 764    free(psc);
 765 }
 766
 767 #define SWRAST_DRIVER_NAME "swrast"
 768
 769 static const struct glx_screen_vtable drisw_screen_vtable = {
 770    .create_context         = drisw_create_context,
 771    .create_context_attribs = drisw_create_context_attribs,
 772    .query_renderer_integer = drisw_query_renderer_integer,
 773    .query_renderer_string  = drisw_query_renderer_string,
 774 };
 775
 776 static void
 777 driswBindExtensions(struct drisw_screen *psc, const __DRIextension **extensions)
 778 {
 779    int i;
 780
 781    __glXEnableDirectExtension(&psc->base, "GLX_SGI_make_current_read");
 782
 783    if (psc->swrast->base.version >= 3) {
 784       __glXEnableDirectExtension(&psc->base, "GLX_ARB_create_context");
 785       __glXEnableDirectExtension(&psc->base, "GLX_ARB_create_context_profile");
 786
 787       /* DRISW version >= 2 implies support for OpenGL ES.
 788        */
 789       __glXEnableDirectExtension(&psc->base,
 790                                  "GLX_EXT_create_context_es_profile");
 791       __glXEnableDirectExtension(&psc->base,
 792                                  "GLX_EXT_create_context_es2_profile");
 793    }
 794
 795    if (psc->copySubBuffer)
 796       __glXEnableDirectExtension(&psc->base, "GLX_MESA_copy_sub_buffer");
 797
 798    /* FIXME: Figure out what other extensions can be ported here from dri2. */
 799    for (i = 0; extensions[i]; i++) {
 800       if ((strcmp(extensions[i]->name, __DRI_TEX_BUFFER) == 0)) {
 801          psc->texBuffer = (__DRItexBufferExtension *) extensions[i];
 802          __glXEnableDirectExtension(&psc->base, "GLX_EXT_texture_from_pixmap");
 803       }
 804       /* DRISW version 3 is also required because GLX_MESA_query_renderer
 805        * requires GLX_ARB_create_context_profile.
 806        */
 807       if (psc->swrast->base.version >= 3
 808           && strcmp(extensions[i]->name, __DRI2_RENDERER_QUERY) == 0) {
 809          psc->rendererQuery = (__DRI2rendererQueryExtension *) extensions[i];
 810          __glXEnableDirectExtension(&psc->base, "GLX_MESA_query_renderer");
 811       }
 812       if (strcmp(extensions[i]->name, __DRI2_FLUSH_CONTROL) == 0) {
 813           __glXEnableDirectExtension(&psc->base,
 814                                      "GLX_ARB_context_flush_control");
 815       }
 816    }
 817 }
 818
 819 static int
 820 check_xshm(Display *dpy)
 821 {
 822    int (*old_handler)(Display *, XErrorEvent *);
 823
 824    int ignore;
 825    XShmSegmentInfo info = { 0, };
 826
 827    if (!XQueryExtension(dpy, "MIT-SHM", &xshm_opcode, &ignore, &ignore))
 828       return False;
 829
 830    old_handler = XSetErrorHandler(handle_xerror);
 831    XShmDetach(dpy, &info);
 832    XSync(dpy, False);
 833    (void) XSetErrorHandler(old_handler);
 834
 835    /* BadRequest means we're a remote client. If we were local we'd
 836     * expect BadValue since 'info' has an invalid segment name.
 837     */
 838    if (xshm_error == BadRequest)
 839       return False;
 840
 841    xshm_error = 0;
 842    return True;
 843 }
 844
 845 static struct glx_screen *
 846 driswCreateScreen(int screen, struct glx_display *priv)
 847 {
 848    __GLXDRIscreen *psp;
 849    const __DRIconfig **driver_configs;
 850    const __DRIextension **extensions;
 851    struct drisw_screen *psc;
 852    struct glx_config *configs = NULL, *visuals = NULL;
 853    int i;
 854    const __DRIextension **loader_extensions_local;
 855
 856    psc = calloc(1, sizeof *psc);
 857    if (psc == NULL)
 858       return NULL;
 859
 860    if (!glx_screen_init(&psc->base, screen, priv)) {
 861       free(psc);
 862       return NULL;
 863    }
 864
 865    extensions = driOpenDriver(SWRAST_DRIVER_NAME, &psc->driver);
 866    if (extensions == NULL)
 867       goto handle_error;
 868
 869    if (!check_xshm(psc->base.dpy))
 870       loader_extensions_local = loader_extensions_noshm;
 871    else
 872       loader_extensions_local = loader_extensions_shm;
 873
 874    for (i = 0; extensions[i]; i++) {
 875       if (strcmp(extensions[i]->name, __DRI_CORE) == 0)
 876          psc->core = (__DRIcoreExtension *) extensions[i];
 877       if (strcmp(extensions[i]->name, __DRI_SWRAST) == 0)
 878          psc->swrast = (__DRIswrastExtension *) extensions[i];
 879       if (strcmp(extensions[i]->name, __DRI_COPY_SUB_BUFFER) == 0)
 880          psc->copySubBuffer = (__DRIcopySubBufferExtension *) extensions[i];
 881    }
 882
 883    if (psc->core == NULL || psc->swrast == NULL) {
 884       ErrorMessageF("core dri extension not found\n");
 885       goto handle_error;
 886    }
 887
 888    if (psc->swrast->base.version >= 4) {
 889       psc->driScreen =
 890          psc->swrast->createNewScreen2(screen, loader_extensions_local,
 891                                        extensions,
 892                                        &driver_configs, psc);
 893    } else {
 894       psc->driScreen =
 895          psc->swrast->createNewScreen(screen, loader_extensions_local,
 896                                       &driver_configs, psc);
 897    }
 898    if (psc->driScreen == NULL) {
 899       ErrorMessageF("failed to create dri screen\n");
 900       goto handle_error;
 901    }
 902
 903    extensions = psc->core->getExtensions(psc->driScreen);
 904    driswBindExtensions(psc, extensions);
 905
 906    configs = driConvertConfigs(psc->core, psc->base.configs, driver_configs);
 907    visuals = driConvertConfigs(psc->core, psc->base.visuals, driver_configs);
 908
 909    if (!configs || !visuals) {
 910        ErrorMessageF("No matching fbConfigs or visuals found\n");
 911        goto handle_error;
 912    }
 913
 914    glx_config_destroy_list(psc->base.configs);
 915    psc->base.configs = configs;
 916    glx_config_destroy_list(psc->base.visuals);
 917    psc->base.visuals = visuals;
 918
 919    psc->driver_configs = driver_configs;
 920
 921    psc->base.vtable = &drisw_screen_vtable;
 922    psp = &psc->vtable;
 923    psc->base.driScreen = psp;
 924    psp->destroyScreen = driswDestroyScreen;
 925    psp->createDrawable = driswCreateDrawable;
 926    psp->swapBuffers = driswSwapBuffers;
 927
 928    if (psc->copySubBuffer)
 929       psp->copySubBuffer = driswCopySubBuffer;
 930
 931    return &psc->base;
 932
 933  handle_error:
 934    if (configs)
 935        glx_config_destroy_list(configs);
 936    if (visuals)
 937        glx_config_destroy_list(visuals);
 938    if (psc->driScreen)
 939        psc->core->destroyScreen(psc->driScreen);
 940    psc->driScreen = NULL;
 941
 942    if (psc->driver)
 943       dlclose(psc->driver);
 944    glx_screen_cleanup(&psc->base);
 945    free(psc);
 946
 947    CriticalErrorMessageF("failed to load driver: %s\n", SWRAST_DRIVER_NAME);
 948
 949    return NULL;
 950 }
 951
 952 /* Called from __glXFreeDisplayPrivate.
 953  */
 954 static void
 955 driswDestroyDisplay(__GLXDRIdisplay * dpy)
 956 {
 957    free(dpy);
 958 }
 959
 960 /*
 961  * Allocate, initialize and return a __DRIdisplayPrivate object.
 962  * This is called from __glXInitialize() when we are given a new
 963  * display pointer.
 964  */
 965 _X_HIDDEN __GLXDRIdisplay *
 966 driswCreateDisplay(Display * dpy)
 967 {
 968    struct drisw_display *pdpyp;
 969
 970    pdpyp = malloc(sizeof *pdpyp);
 971    if (pdpyp == NULL)
 972       return NULL;
 973
 974    pdpyp->base.destroyDisplay = driswDestroyDisplay;
 975    pdpyp->base.createScreen = driswCreateScreen;
 976
 977    return &pdpyp->base;
 978 }
 979
 980 #endif /* GLX_DIRECT_RENDERING */