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    readable = pread->xDrawable;
 307
 308    ximage = prp->ximage;
 309    ximage->data = prp->shminfo.shmaddr; /* no offset */
 310    ximage->width = w;
 311    ximage->height = h;
 312    ximage->bytes_per_line = bytes_per_line(w * ximage->bits_per_pixel, 32);
 313
 314    XShmGetImage(dpy, readable, ximage, x, y, ~0L);
 315    return GL_TRUE;
 316 }
 317
 318 static void
 319 swrastGetImageShm(__DRIdrawable * read,
 320                   int x, int y, int w, int h,
 321                   int shmid, void *loaderPrivate)
 322 {
 323    swrastGetImageShm2(read, x, y, w, h, shmid, loaderPrivate);
 324 }
 325
 326 static const __DRIswrastLoaderExtension swrastLoaderExtension_shm = {
 327    .base = {__DRI_SWRAST_LOADER, 6 },
 328
 329    .getDrawableInfo     = swrastGetDrawableInfo,
 330    .putImage            = swrastPutImage,
 331    .getImage            = swrastGetImage,
 332    .putImage2           = swrastPutImage2,
 333    .getImage2           = swrastGetImage2,
 334    .putImageShm         = swrastPutImageShm,
 335    .getImageShm         = swrastGetImageShm,
 336    .putImageShm2        = swrastPutImageShm2,
 337    .getImageShm2        = swrastGetImageShm2,
 338 };
 339
 340 static const __DRIextension *loader_extensions_shm[] = {
 341    &swrastLoaderExtension_shm.base,
 342    NULL
 343 };
 344
 345 static const __DRIswrastLoaderExtension swrastLoaderExtension = {
 346    .base = {__DRI_SWRAST_LOADER, 3 },
 347
 348    .getDrawableInfo     = swrastGetDrawableInfo,
 349    .putImage            = swrastPutImage,
 350    .getImage            = swrastGetImage,
 351    .putImage2           = swrastPutImage2,
 352    .getImage2           = swrastGetImage2,
 353 };
 354
 355 static const __DRIextension *loader_extensions_noshm[] = {
 356    &swrastLoaderExtension.base,
 357    NULL
 358 };
 359
 360 /**
 361  * GLXDRI functions
 362  */
 363
 364 static void
 365 drisw_destroy_context(struct glx_context *context)
 366 {
 367    struct drisw_context *pcp = (struct drisw_context *) context;
 368    struct drisw_screen *psc = (struct drisw_screen *) context->psc;
 369
 370    driReleaseDrawables(&pcp->base);
 371
 372    free((char *) context->extensions);
 373
 374    (*psc->core->destroyContext) (pcp->driContext);
 375
 376    free(pcp);
 377 }
 378
 379 static int
 380 drisw_bind_context(struct glx_context *context, struct glx_context *old,
 381                    GLXDrawable draw, GLXDrawable read)
 382 {
 383    struct drisw_context *pcp = (struct drisw_context *) context;
 384    struct drisw_screen *psc = (struct drisw_screen *) pcp->base.psc;
 385    struct drisw_drawable *pdraw, *pread;
 386
 387    pdraw = (struct drisw_drawable *) driFetchDrawable(context, draw);
 388    pread = (struct drisw_drawable *) driFetchDrawable(context, read);
 389
 390    driReleaseDrawables(&pcp->base);
 391
 392    if ((*psc->core->bindContext) (pcp->driContext,
 393                                   pdraw ? pdraw->driDrawable : NULL,
 394                                   pread ? pread->driDrawable : NULL))
 395       return Success;
 396
 397    return GLXBadContext;
 398 }
 399
 400 static void
 401 drisw_unbind_context(struct glx_context *context, struct glx_context *new)
 402 {
 403    struct drisw_context *pcp = (struct drisw_context *) context;
 404    struct drisw_screen *psc = (struct drisw_screen *) pcp->base.psc;
 405
 406    (*psc->core->unbindContext) (pcp->driContext);
 407 }
 408
 409 static void
 410 drisw_bind_tex_image(Display * dpy,
 411                     GLXDrawable drawable,
 412                     int buffer, const int *attrib_list)
 413 {
 414    struct glx_context *gc = __glXGetCurrentContext();
 415    struct drisw_context *pcp = (struct drisw_context *) gc;
 416    __GLXDRIdrawable *base = GetGLXDRIDrawable(dpy, drawable);
 417    struct drisw_drawable *pdraw = (struct drisw_drawable *) base;
 418    struct drisw_screen *psc;
 419
 420    __glXInitialize(dpy);
 421
 422    if (pdraw != NULL) {
 423       psc = (struct drisw_screen *) base->psc;
 424
 425       if (!psc->texBuffer)
 426          return;
 427
 428       if (psc->texBuffer->base.version >= 2 &&
 429         psc->texBuffer->setTexBuffer2 != NULL) {
 430               (*psc->texBuffer->setTexBuffer2) (pcp->driContext,
 431                                            pdraw->base.textureTarget,
 432                                            pdraw->base.textureFormat,
 433                                            pdraw->driDrawable);
 434       }
 435       else {
 436               (*psc->texBuffer->setTexBuffer) (pcp->driContext,
 437                                           pdraw->base.textureTarget,
 438                                           pdraw->driDrawable);
 439       }
 440    }
 441 }
 442
 443 static void
 444 drisw_release_tex_image(Display * dpy, GLXDrawable drawable, int buffer)
 445 {
 446    struct glx_context *gc = __glXGetCurrentContext();
 447    struct drisw_context *pcp = (struct drisw_context *) gc;
 448    __GLXDRIdrawable *base = GetGLXDRIDrawable(dpy, drawable);
 449    struct glx_display *dpyPriv = __glXInitialize(dpy);
 450    struct drisw_drawable *pdraw = (struct drisw_drawable *) base;
 451    struct drisw_screen *psc;
 452
 453    if (dpyPriv != NULL && pdraw != NULL) {
 454       psc = (struct drisw_screen *) base->psc;
 455
 456       if (!psc->texBuffer)
 457          return;
 458
 459       if (psc->texBuffer->base.version >= 3 &&
 460           psc->texBuffer->releaseTexBuffer != NULL) {
 461          (*psc->texBuffer->releaseTexBuffer) (pcp->driContext,
 462                                            pdraw->base.textureTarget,
 463                                            pdraw->driDrawable);
 464       }
 465    }
 466 }
 467
 468 static const struct glx_context_vtable drisw_context_vtable = {
 469    .destroy             = drisw_destroy_context,
 470    .bind                = drisw_bind_context,
 471    .unbind              = drisw_unbind_context,
 472    .wait_gl             = NULL,
 473    .wait_x              = NULL,
 474    .use_x_font          = DRI_glXUseXFont,
 475    .bind_tex_image      = drisw_bind_tex_image,
 476    .release_tex_image   = drisw_release_tex_image,
 477    .get_proc_address    = NULL,
 478 };
 479
 480 static struct glx_context *
 481 drisw_create_context(struct glx_screen *base,
 482                      struct glx_config *config_base,
 483                      struct glx_context *shareList, int renderType)
 484 {
 485    struct drisw_context *pcp, *pcp_shared;
 486    __GLXDRIconfigPrivate *config = (__GLXDRIconfigPrivate *) config_base;
 487    struct drisw_screen *psc = (struct drisw_screen *) base;
 488    __DRIcontext *shared = NULL;
 489
 490    if (!psc->base.driScreen)
 491       return NULL;
 492
 493    /* Check the renderType value */
 494    if (!validate_renderType_against_config(config_base, renderType))
 495        return NULL;
 496
 497    if (shareList) {
 498       /* If the shareList context is not a DRISW context, we cannot possibly
 499        * create a DRISW context that shares it.
 500        */
 501       if (shareList->vtable->destroy != drisw_destroy_context) {
 502          return NULL;
 503       }
 504
 505       pcp_shared = (struct drisw_context *) shareList;
 506       shared = pcp_shared->driContext;
 507    }
 508
 509    pcp = calloc(1, sizeof *pcp);
 510    if (pcp == NULL)
 511       return NULL;
 512
 513    if (!glx_context_init(&pcp->base, &psc->base, &config->base)) {
 514       free(pcp);
 515       return NULL;
 516    }
 517
 518    pcp->base.renderType = renderType;
 519
 520    pcp->driContext =
 521       (*psc->core->createNewContext) (psc->driScreen,
 522                                       config->driConfig, shared, pcp);
 523    if (pcp->driContext == NULL) {
 524       free(pcp);
 525       return NULL;
 526    }
 527
 528    pcp->base.vtable = &drisw_context_vtable;
 529
 530    return &pcp->base;
 531 }
 532
 533 static struct glx_context *
 534 drisw_create_context_attribs(struct glx_screen *base,
 535                              struct glx_config *config_base,
 536                              struct glx_context *shareList,
 537                              unsigned num_attribs,
 538                              const uint32_t *attribs,
 539                              unsigned *error)
 540 {
 541    struct drisw_context *pcp, *pcp_shared;
 542    __GLXDRIconfigPrivate *config = (__GLXDRIconfigPrivate *) config_base;
 543    struct drisw_screen *psc = (struct drisw_screen *) base;
 544    __DRIcontext *shared = NULL;
 545
 546    uint32_t minor_ver;
 547    uint32_t major_ver;
 548    uint32_t renderType;
 549    uint32_t flags;
 550    unsigned api;
 551    int reset;
 552    int release;
 553    uint32_t ctx_attribs[2 * 5];
 554    unsigned num_ctx_attribs = 0;
 555
 556    if (!psc->base.driScreen)
 557       return NULL;
 558
 559    if (psc->swrast->base.version < 3)
 560       return NULL;
 561
 562    /* Remap the GLX tokens to DRI2 tokens.
 563     */
 564    if (!dri2_convert_glx_attribs(num_attribs, attribs,
 565                                  &major_ver, &minor_ver, &renderType, &flags,
 566                                  &api, &reset, &release, error))
 567       return NULL;
 568
 569    if (!dri2_check_no_error(flags, shareList, major_ver, error))
 570       return NULL;
 571
 572    /* Check the renderType value */
 573    if (!validate_renderType_against_config(config_base, renderType)) {
 574        return NULL;
 575    }
 576
 577    if (reset != __DRI_CTX_RESET_NO_NOTIFICATION)
 578       return NULL;
 579
 580    if (release != __DRI_CTX_RELEASE_BEHAVIOR_FLUSH &&
 581        release != __DRI_CTX_RELEASE_BEHAVIOR_NONE)
 582       return NULL;
 583
 584    if (shareList) {
 585       pcp_shared = (struct drisw_context *) shareList;
 586       shared = pcp_shared->driContext;
 587    }
 588
 589    pcp = calloc(1, sizeof *pcp);
 590    if (pcp == NULL)
 591       return NULL;
 592
 593    if (!glx_context_init(&pcp->base, &psc->base, config_base)) {
 594       free(pcp);
 595       return NULL;
 596    }
 597
 598    ctx_attribs[num_ctx_attribs++] = __DRI_CTX_ATTRIB_MAJOR_VERSION;
 599    ctx_attribs[num_ctx_attribs++] = major_ver;
 600    ctx_attribs[num_ctx_attribs++] = __DRI_CTX_ATTRIB_MINOR_VERSION;
 601    ctx_attribs[num_ctx_attribs++] = minor_ver;
 602    if (release != __DRI_CTX_RELEASE_BEHAVIOR_FLUSH) {
 603        ctx_attribs[num_ctx_attribs++] = __DRI_CTX_ATTRIB_RELEASE_BEHAVIOR;
 604        ctx_attribs[num_ctx_attribs++] = release;
 605    }
 606
 607    if (flags != 0) {
 608       ctx_attribs[num_ctx_attribs++] = __DRI_CTX_ATTRIB_FLAGS;
 609
 610       /* The current __DRI_CTX_FLAG_* values are identical to the
 611        * GLX_CONTEXT_*_BIT values.
 612        */
 613       ctx_attribs[num_ctx_attribs++] = flags;
 614
 615       if (flags & __DRI_CTX_FLAG_NO_ERROR)
 616          pcp->base.noError = GL_TRUE;
 617    }
 618
 619    pcp->base.renderType = renderType;
 620
 621    pcp->driContext =
 622       (*psc->swrast->createContextAttribs) (psc->driScreen,
 623                                             api,
 624                                             config ? config->driConfig : 0,
 625                                             shared,
 626                                             num_ctx_attribs / 2,
 627                                             ctx_attribs,
 628                                             error,
 629                                             pcp);
 630    if (pcp->driContext == NULL) {
 631       free(pcp);
 632       return NULL;
 633    }
 634
 635    pcp->base.vtable = &drisw_context_vtable;
 636
 637    return &pcp->base;
 638 }
 639
 640 static void
 641 driswDestroyDrawable(__GLXDRIdrawable * pdraw)
 642 {
 643    struct drisw_drawable *pdp = (struct drisw_drawable *) pdraw;
 644    struct drisw_screen *psc = (struct drisw_screen *) pdp->base.psc;
 645
 646    (*psc->core->destroyDrawable) (pdp->driDrawable);
 647
 648    XDestroyDrawable(pdp, pdraw->psc->dpy, pdraw->drawable);
 649    free(pdp);
 650 }
 651
 652 static __GLXDRIdrawable *
 653 driswCreateDrawable(struct glx_screen *base, XID xDrawable,
 654                     GLXDrawable drawable, struct glx_config *modes)
 655 {
 656    struct drisw_drawable *pdp;
 657    __GLXDRIconfigPrivate *config = (__GLXDRIconfigPrivate *) modes;
 658    struct drisw_screen *psc = (struct drisw_screen *) base;
 659    const __DRIswrastExtension *swrast = psc->swrast;
 660    Display *dpy = psc->base.dpy;
 661
 662    pdp = calloc(1, sizeof(*pdp));
 663    if (!pdp)
 664       return NULL;
 665
 666    pdp->base.xDrawable = xDrawable;
 667    pdp->base.drawable = drawable;
 668    pdp->base.psc = &psc->base;
 669    pdp->config = modes;
 670    pdp->gc = XCreateGC(dpy, xDrawable, 0, NULL);
 671    pdp->xDepth = 0;
 672
 673    /* Use the visual depth, if this fbconfig corresponds to a visual */
 674    if (pdp->config->visualID != 0) {
 675       int matches = 0;
 676       XVisualInfo *visinfo, template;
 677
 678       template.visualid = pdp->config->visualID;
 679       template.screen = pdp->config->screen;
 680       visinfo = XGetVisualInfo(dpy, VisualIDMask | VisualScreenMask,
 681                                &template, &matches);
 682
 683       if (visinfo && matches) {
 684          pdp->xDepth = visinfo->depth;
 685          XFree(visinfo);
 686       }
 687    }
 688
 689    /* Otherwise, or if XGetVisualInfo failed, ask the server */
 690    if (pdp->xDepth == 0) {
 691       Window root;
 692       int x, y;
 693       unsigned uw, uh, bw, depth;
 694
 695       XGetGeometry(dpy, xDrawable, &root, &x, &y, &uw, &uh, &bw, &depth);
 696       pdp->xDepth = depth;
 697    }
 698
 699    /* Create a new drawable */
 700    pdp->driDrawable =
 701       (*swrast->createNewDrawable) (psc->driScreen, config->driConfig, pdp);
 702
 703    if (!pdp->driDrawable) {
 704       XDestroyDrawable(pdp, psc->base.dpy, xDrawable);
 705       free(pdp);
 706       return NULL;
 707    }
 708
 709    pdp->base.destroyDrawable = driswDestroyDrawable;
 710
 711    return &pdp->base;
 712 }
 713
 714 static int64_t
 715 driswSwapBuffers(__GLXDRIdrawable * pdraw,
 716                  int64_t target_msc, int64_t divisor, int64_t remainder,
 717                  Bool flush)
 718 {
 719    struct drisw_drawable *pdp = (struct drisw_drawable *) pdraw;
 720    struct drisw_screen *psc = (struct drisw_screen *) pdp->base.psc;
 721
 722    (void) target_msc;
 723    (void) divisor;
 724    (void) remainder;
 725
 726    if (flush) {
 727       glFlush();
 728    }
 729
 730    (*psc->core->swapBuffers) (pdp->driDrawable);
 731
 732    return 0;
 733 }
 734
 735 static void
 736 driswCopySubBuffer(__GLXDRIdrawable * pdraw,
 737                    int x, int y, int width, int height, Bool flush)
 738 {
 739    struct drisw_drawable *pdp = (struct drisw_drawable *) pdraw;
 740    struct drisw_screen *psc = (struct drisw_screen *) pdp->base.psc;
 741
 742    if (flush) {
 743       glFlush();
 744    }
 745
 746    (*psc->copySubBuffer->copySubBuffer) (pdp->driDrawable,
 747                                             x, y, width, height);
 748 }
 749
 750 static void
 751 driswDestroyScreen(struct glx_screen *base)
 752 {
 753    struct drisw_screen *psc = (struct drisw_screen *) base;
 754
 755    /* Free the direct rendering per screen data */
 756    (*psc->core->destroyScreen) (psc->driScreen);
 757    driDestroyConfigs(psc->driver_configs);
 758    psc->driScreen = NULL;
 759    if (psc->driver)
 760       dlclose(psc->driver);
 761    free(psc);
 762 }
 763
 764 #define SWRAST_DRIVER_NAME "swrast"
 765
 766 static const struct glx_screen_vtable drisw_screen_vtable = {
 767    .create_context         = drisw_create_context,
 768    .create_context_attribs = drisw_create_context_attribs,
 769    .query_renderer_integer = drisw_query_renderer_integer,
 770    .query_renderer_string  = drisw_query_renderer_string,
 771 };
 772
 773 static void
 774 driswBindExtensions(struct drisw_screen *psc, const __DRIextension **extensions)
 775 {
 776    int i;
 777
 778    __glXEnableDirectExtension(&psc->base, "GLX_SGI_make_current_read");
 779
 780    if (psc->swrast->base.version >= 3) {
 781       __glXEnableDirectExtension(&psc->base, "GLX_ARB_create_context");
 782       __glXEnableDirectExtension(&psc->base, "GLX_ARB_create_context_profile");
 783
 784       /* DRISW version >= 2 implies support for OpenGL ES.
 785        */
 786       __glXEnableDirectExtension(&psc->base,
 787                                  "GLX_EXT_create_context_es_profile");
 788       __glXEnableDirectExtension(&psc->base,
 789                                  "GLX_EXT_create_context_es2_profile");
 790    }
 791
 792    if (psc->copySubBuffer)
 793       __glXEnableDirectExtension(&psc->base, "GLX_MESA_copy_sub_buffer");
 794
 795    /* FIXME: Figure out what other extensions can be ported here from dri2. */
 796    for (i = 0; extensions[i]; i++) {
 797       if ((strcmp(extensions[i]->name, __DRI_TEX_BUFFER) == 0)) {
 798          psc->texBuffer = (__DRItexBufferExtension *) extensions[i];
 799          __glXEnableDirectExtension(&psc->base, "GLX_EXT_texture_from_pixmap");
 800       }
 801       /* DRISW version 3 is also required because GLX_MESA_query_renderer
 802        * requires GLX_ARB_create_context_profile.
 803        */
 804       if (psc->swrast->base.version >= 3
 805           && strcmp(extensions[i]->name, __DRI2_RENDERER_QUERY) == 0) {
 806          psc->rendererQuery = (__DRI2rendererQueryExtension *) extensions[i];
 807          __glXEnableDirectExtension(&psc->base, "GLX_MESA_query_renderer");
 808       }
 809       if (strcmp(extensions[i]->name, __DRI2_FLUSH_CONTROL) == 0) {
 810           __glXEnableDirectExtension(&psc->base,
 811                                      "GLX_ARB_context_flush_control");
 812       }
 813    }
 814 }
 815
 816 static int
 817 check_xshm(Display *dpy)
 818 {
 819    int (*old_handler)(Display *, XErrorEvent *);
 820
 821    int ignore;
 822    XShmSegmentInfo info = { 0, };
 823
 824    if (!XQueryExtension(dpy, "MIT-SHM", &xshm_opcode, &ignore, &ignore))
 825       return False;
 826
 827    old_handler = XSetErrorHandler(handle_xerror);
 828    XShmDetach(dpy, &info);
 829    XSync(dpy, False);
 830    (void) XSetErrorHandler(old_handler);
 831
 832    /* BadRequest means we're a remote client. If we were local we'd
 833     * expect BadValue since 'info' has an invalid segment name.
 834     */
 835    if (xshm_error == BadRequest)
 836       return False;
 837
 838    xshm_error = 0;
 839    return True;
 840 }
 841
 842 static struct glx_screen *
 843 driswCreateScreen(int screen, struct glx_display *priv)
 844 {
 845    __GLXDRIscreen *psp;
 846    const __DRIconfig **driver_configs;
 847    const __DRIextension **extensions;
 848    struct drisw_screen *psc;
 849    struct glx_config *configs = NULL, *visuals = NULL;
 850    int i;
 851    const __DRIextension **loader_extensions_local;
 852
 853    psc = calloc(1, sizeof *psc);
 854    if (psc == NULL)
 855       return NULL;
 856
 857    if (!glx_screen_init(&psc->base, screen, priv)) {
 858       free(psc);
 859       return NULL;
 860    }
 861
 862    extensions = driOpenDriver(SWRAST_DRIVER_NAME, &psc->driver);
 863    if (extensions == NULL)
 864       goto handle_error;
 865
 866    if (!check_xshm(psc->base.dpy))
 867       loader_extensions_local = loader_extensions_noshm;
 868    else
 869       loader_extensions_local = loader_extensions_shm;
 870
 871    for (i = 0; extensions[i]; i++) {
 872       if (strcmp(extensions[i]->name, __DRI_CORE) == 0)
 873          psc->core = (__DRIcoreExtension *) extensions[i];
 874       if (strcmp(extensions[i]->name, __DRI_SWRAST) == 0)
 875          psc->swrast = (__DRIswrastExtension *) extensions[i];
 876       if (strcmp(extensions[i]->name, __DRI_COPY_SUB_BUFFER) == 0)
 877          psc->copySubBuffer = (__DRIcopySubBufferExtension *) extensions[i];
 878    }
 879
 880    if (psc->core == NULL || psc->swrast == NULL) {
 881       ErrorMessageF("core dri extension not found\n");
 882       goto handle_error;
 883    }
 884
 885    if (psc->swrast->base.version >= 4) {
 886       psc->driScreen =
 887          psc->swrast->createNewScreen2(screen, loader_extensions_local,
 888                                        extensions,
 889                                        &driver_configs, psc);
 890    } else {
 891       psc->driScreen =
 892          psc->swrast->createNewScreen(screen, loader_extensions_local,
 893                                       &driver_configs, psc);
 894    }
 895    if (psc->driScreen == NULL) {
 896       ErrorMessageF("failed to create dri screen\n");
 897       goto handle_error;
 898    }
 899
 900    extensions = psc->core->getExtensions(psc->driScreen);
 901    driswBindExtensions(psc, extensions);
 902
 903    configs = driConvertConfigs(psc->core, psc->base.configs, driver_configs);
 904    visuals = driConvertConfigs(psc->core, psc->base.visuals, driver_configs);
 905
 906    if (!configs || !visuals) {
 907        ErrorMessageF("No matching fbConfigs or visuals found\n");
 908        goto handle_error;
 909    }
 910
 911    glx_config_destroy_list(psc->base.configs);
 912    psc->base.configs = configs;
 913    glx_config_destroy_list(psc->base.visuals);
 914    psc->base.visuals = visuals;
 915
 916    psc->driver_configs = driver_configs;
 917
 918    psc->base.vtable = &drisw_screen_vtable;
 919    psp = &psc->vtable;
 920    psc->base.driScreen = psp;
 921    psp->destroyScreen = driswDestroyScreen;
 922    psp->createDrawable = driswCreateDrawable;
 923    psp->swapBuffers = driswSwapBuffers;
 924
 925    if (psc->copySubBuffer)
 926       psp->copySubBuffer = driswCopySubBuffer;
 927
 928    return &psc->base;
 929
 930  handle_error:
 931    if (configs)
 932        glx_config_destroy_list(configs);
 933    if (visuals)
 934        glx_config_destroy_list(visuals);
 935    if (psc->driScreen)
 936        psc->core->destroyScreen(psc->driScreen);
 937    psc->driScreen = NULL;
 938
 939    if (psc->driver)
 940       dlclose(psc->driver);
 941    glx_screen_cleanup(&psc->base);
 942    free(psc);
 943
 944    CriticalErrorMessageF("failed to load driver: %s\n", SWRAST_DRIVER_NAME);
 945
 946    return NULL;
 947 }
 948
 949 /* Called from __glXFreeDisplayPrivate.
 950  */
 951 static void
 952 driswDestroyDisplay(__GLXDRIdisplay * dpy)
 953 {
 954    free(dpy);
 955 }
 956
 957 /*
 958  * Allocate, initialize and return a __DRIdisplayPrivate object.
 959  * This is called from __glXInitialize() when we are given a new
 960  * display pointer.
 961  */
 962 _X_HIDDEN __GLXDRIdisplay *
 963 driswCreateDisplay(Display * dpy)
 964 {
 965    struct drisw_display *pdpyp;
 966
 967    pdpyp = malloc(sizeof *pdpyp);
 968    if (pdpyp == NULL)
 969       return NULL;
 970
 971    pdpyp->base.destroyDisplay = driswDestroyDisplay;
 972    pdpyp->base.createScreen = driswCreateScreen;
 973
 974    return &pdpyp->base;
 975 }
 976
 977 #endif /* GLX_DIRECT_RENDERING */