src/glx/dri2_glx.c

   1 /*
   2  * Copyright © 2008 Red Hat, Inc.
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Soft-
   6  * ware"), to deal in the Software without restriction, including without
   7  * limitation the rights to use, copy, modify, merge, publish, distribute,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, provided that the above copyright
  10  * notice(s) and this permission notice appear in all copies of the Soft-
  11  * ware and that both the above copyright notice(s) and this permission
  12  * notice appear in supporting documentation.
  13  *
  14  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  15  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABIL-
  16  * ITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY
  17  * RIGHTS. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR HOLDERS INCLUDED IN
  18  * THIS NOTICE BE LIABLE FOR ANY CLAIM, OR ANY SPECIAL INDIRECT OR CONSE-
  19  * QUENTIAL DAMAGES, OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
  20  * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
  21  * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFOR-
  22  * MANCE OF THIS SOFTWARE.
  23  *
  24  * Except as contained in this notice, the name of a copyright holder shall
  25  * not be used in advertising or otherwise to promote the sale, use or
  26  * other dealings in this Software without prior written authorization of
  27  * the copyright holder.
  28  *
  29  * Authors:
  30  *   Kristian Høgsberg (krh@redhat.com)
  31  */
  32
  33 #if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
  34
  35 #include <X11/Xlib.h>
  36 #include <X11/extensions/Xfixes.h>
  37 #include <X11/extensions/Xdamage.h>
  38 #include "glapi.h"
  39 #include "glxclient.h"
  40 #include <X11/extensions/dri2proto.h>
  41 #include "xf86dri.h"
  42 #include <dlfcn.h>
  43 #include <fcntl.h>
  44 #include <unistd.h>
  45 #include <sys/types.h>
  46 #include <sys/mman.h>
  47 #include "xf86drm.h"
  48 #include "dri2.h"
  49 #include "dri_common.h"
  50
  51 /* From xmlpool/options.h, user exposed so should be stable */
  52 #define DRI_CONF_VBLANK_NEVER 0
  53 #define DRI_CONF_VBLANK_DEF_INTERVAL_0 1
  54 #define DRI_CONF_VBLANK_DEF_INTERVAL_1 2
  55 #define DRI_CONF_VBLANK_ALWAYS_SYNC 3
  56
  57 #undef DRI2_MINOR
  58 #define DRI2_MINOR 1
  59
  60 struct dri2_display
  61 {
  62    __GLXDRIdisplay base;
  63
  64    /*
  65     ** XFree86-DRI version information
  66     */
  67    int driMajor;
  68    int driMinor;
  69    int driPatch;
  70    int swapAvailable;
  71    int invalidateAvailable;
  72
  73    __glxHashTable *dri2Hash;
  74
  75    const __DRIextension *loader_extensions[4];
  76 };
  77
  78 struct dri2_screen {
  79    __GLXscreenConfigs base;
  80
  81    __DRIscreen *driScreen;
  82    __GLXDRIscreen vtable;
  83    const __DRIdri2Extension *dri2;
  84    const __DRIcoreExtension *core;
  85
  86    const __DRI2flushExtension *f;
  87    const __DRI2configQueryExtension *config;
  88    const __DRItexBufferExtension *texBuffer;
  89
  90    void *driver;
  91    int fd;
  92 };
  93
  94 struct dri2_context
  95 {
  96    __GLXDRIcontext base;
  97    __DRIcontext *driContext;
  98    __GLXscreenConfigs *psc;
  99 };
 100
 101 struct dri2_drawable
 102 {
 103    __GLXDRIdrawable base;
 104    __DRIdrawable *driDrawable;
 105    __DRIbuffer buffers[5];
 106    int bufferCount;
 107    int width, height;
 108    int have_back;
 109    int have_fake_front;
 110    int swap_interval;
 111 };
 112
 113 static void
 114 dri2DestroyContext(__GLXDRIcontext *context,
 115                    __GLXscreenConfigs *base, Display *dpy)
 116 {
 117    struct dri2_context *pcp = (struct dri2_context *) context;
 118    struct dri2_screen *psc = (struct dri2_screen *) base;
 119
 120    (*psc->core->destroyContext) (pcp->driContext);
 121
 122    Xfree(pcp);
 123 }
 124
 125 static Bool
 126 dri2BindContext(__GLXDRIcontext *context,
 127                 __GLXDRIdrawable *draw, __GLXDRIdrawable *read)
 128 {
 129    struct dri2_context *pcp = (struct dri2_context *) context;
 130    struct dri2_screen *psc = (struct dri2_screen *) pcp->psc;
 131    struct dri2_drawable *pdr = (struct dri2_drawable *) draw;
 132    struct dri2_drawable *prd = (struct dri2_drawable *) read;
 133
 134    return (*psc->core->bindContext) (pcp->driContext,
 135                                      pdr->driDrawable, prd->driDrawable);
 136 }
 137
 138 static void
 139 dri2UnbindContext(__GLXDRIcontext *context)
 140 {
 141    struct dri2_context *pcp = (struct dri2_context *) context;
 142    struct dri2_screen *psc = (struct dri2_screen *) pcp->psc;
 143
 144    (*psc->core->unbindContext) (pcp->driContext);
 145 }
 146
 147 static __GLXDRIcontext *
 148 dri2CreateContext(__GLXscreenConfigs *base,
 149                   const __GLcontextModes * mode,
 150                   GLXContext gc, GLXContext shareList, int renderType)
 151 {
 152    struct dri2_context *pcp, *pcp_shared;
 153    struct dri2_screen *psc = (struct dri2_screen *) base;
 154    __GLXDRIconfigPrivate *config = (__GLXDRIconfigPrivate *) mode;
 155    __DRIcontext *shared = NULL;
 156
 157    if (shareList) {
 158       pcp_shared = (struct dri2_context *) shareList->driContext;
 159       shared = pcp_shared->driContext;
 160    }
 161
 162    pcp = Xmalloc(sizeof *pcp);
 163    if (pcp == NULL)
 164       return NULL;
 165
 166    pcp->psc = &psc->base;
 167    pcp->driContext =
 168       (*psc->dri2->createNewContext) (psc->driScreen,
 169                                       config->driConfig, shared, pcp);
 170    gc->__driContext = pcp->driContext;
 171
 172    if (pcp->driContext == NULL) {
 173       Xfree(pcp);
 174       return NULL;
 175    }
 176
 177    pcp->base.destroyContext = dri2DestroyContext;
 178    pcp->base.bindContext = dri2BindContext;
 179    pcp->base.unbindContext = dri2UnbindContext;
 180
 181    return &pcp->base;
 182 }
 183
 184 static void
 185 dri2DestroyDrawable(__GLXDRIdrawable *base)
 186 {
 187    struct dri2_screen *psc = (struct dri2_screen *) base->psc;
 188    struct dri2_drawable *pdraw = (struct dri2_drawable *) base;
 189    __GLXdisplayPrivate *dpyPriv;
 190    struct dri2_display *pdp;
 191
 192    dpyPriv = __glXInitialize(base->psc->dpy);
 193    pdp = (struct dri2_display *)dpyPriv->dri2Display;
 194
 195    __glxHashDelete(pdp->dri2Hash, pdraw->base.xDrawable);
 196    (*psc->core->destroyDrawable) (pdraw->driDrawable);
 197    DRI2DestroyDrawable(psc->base.dpy, pdraw->base.xDrawable);
 198    Xfree(pdraw);
 199 }
 200
 201 static __GLXDRIdrawable *
 202 dri2CreateDrawable(__GLXscreenConfigs *base, XID xDrawable,
 203                    GLXDrawable drawable, const __GLcontextModes * modes)
 204 {
 205    struct dri2_drawable *pdraw;
 206    struct dri2_screen *psc = (struct dri2_screen *) base;
 207    __GLXDRIconfigPrivate *config = (__GLXDRIconfigPrivate *) modes;
 208    __GLXdisplayPrivate *dpyPriv;
 209    struct dri2_display *pdp;
 210    GLint vblank_mode = DRI_CONF_VBLANK_DEF_INTERVAL_1;
 211
 212    pdraw = Xmalloc(sizeof(*pdraw));
 213    if (!pdraw)
 214       return NULL;
 215
 216    pdraw->base.destroyDrawable = dri2DestroyDrawable;
 217    pdraw->base.xDrawable = xDrawable;
 218    pdraw->base.drawable = drawable;
 219    pdraw->base.psc = &psc->base;
 220    pdraw->bufferCount = 0;
 221    pdraw->swap_interval = 1; /* default may be overridden below */
 222    pdraw->have_back = 0;
 223
 224    if (psc->config)
 225       psc->config->configQueryi(psc->driScreen,
 226                                 "vblank_mode", &vblank_mode);
 227
 228    switch (vblank_mode) {
 229    case DRI_CONF_VBLANK_NEVER:
 230    case DRI_CONF_VBLANK_DEF_INTERVAL_0:
 231       pdraw->swap_interval = 0;
 232       break;
 233    case DRI_CONF_VBLANK_DEF_INTERVAL_1:
 234    case DRI_CONF_VBLANK_ALWAYS_SYNC:
 235    default:
 236       pdraw->swap_interval = 1;
 237       break;
 238    }
 239
 240    DRI2CreateDrawable(psc->base.dpy, xDrawable);
 241
 242    dpyPriv = __glXInitialize(psc->base.dpy);
 243    pdp = (struct dri2_display *)dpyPriv->dri2Display;;
 244    /* Create a new drawable */
 245    pdraw->driDrawable =
 246       (*psc->dri2->createNewDrawable) (psc->driScreen,
 247                                        config->driConfig, pdraw);
 248
 249    if (!pdraw->driDrawable) {
 250       DRI2DestroyDrawable(psc->base.dpy, xDrawable);
 251       Xfree(pdraw);
 252       return NULL;
 253    }
 254
 255    if (__glxHashInsert(pdp->dri2Hash, xDrawable, pdraw)) {
 256       (*psc->core->destroyDrawable) (pdraw->driDrawable);
 257       DRI2DestroyDrawable(psc->base.dpy, xDrawable);
 258       Xfree(pdraw);
 259       return None;
 260    }
 261
 262
 263 #ifdef X_DRI2SwapInterval
 264    /*
 265     * Make sure server has the same swap interval we do for the new
 266     * drawable.
 267     */
 268    if (pdp->swapAvailable)
 269       DRI2SwapInterval(psc->base.dpy, xDrawable, pdraw->swap_interval);
 270 #endif
 271
 272    return &pdraw->base;
 273 }
 274
 275 #ifdef X_DRI2GetMSC
 276
 277 static int
 278 dri2DrawableGetMSC(__GLXscreenConfigs *psc, __GLXDRIdrawable *pdraw,
 279                    int64_t *ust, int64_t *msc, int64_t *sbc)
 280 {
 281    return DRI2GetMSC(psc->dpy, pdraw->xDrawable, ust, msc, sbc);
 282 }
 283
 284 #endif
 285
 286
 287 #ifdef X_DRI2WaitMSC
 288
 289 static int
 290 dri2WaitForMSC(__GLXDRIdrawable *pdraw, int64_t target_msc, int64_t divisor,
 291                int64_t remainder, int64_t *ust, int64_t *msc, int64_t *sbc)
 292 {
 293    return DRI2WaitMSC(pdraw->psc->dpy, pdraw->xDrawable, target_msc, divisor,
 294                       remainder, ust, msc, sbc);
 295 }
 296
 297 static int
 298 dri2WaitForSBC(__GLXDRIdrawable *pdraw, int64_t target_sbc, int64_t *ust,
 299                int64_t *msc, int64_t *sbc)
 300 {
 301    return DRI2WaitSBC(pdraw->psc->dpy, pdraw->xDrawable, target_sbc, ust, msc,
 302                       sbc);
 303 }
 304
 305 #endif /* X_DRI2WaitMSC */
 306
 307 static void
 308 dri2CopySubBuffer(__GLXDRIdrawable *pdraw, int x, int y, int width, int height)
 309 {
 310    struct dri2_drawable *priv = (struct dri2_drawable *) pdraw;
 311    struct dri2_screen *psc = (struct dri2_screen *) pdraw->psc;
 312    XRectangle xrect;
 313    XserverRegion region;
 314
 315    /* Check we have the right attachments */
 316    if (!priv->have_back)
 317       return;
 318
 319    xrect.x = x;
 320    xrect.y = priv->height - y - height;
 321    xrect.width = width;
 322    xrect.height = height;
 323
 324 #ifdef __DRI2_FLUSH
 325    if (psc->f)
 326       (*psc->f->flush) (priv->driDrawable);
 327 #endif
 328
 329    region = XFixesCreateRegion(psc->base.dpy, &xrect, 1);
 330    DRI2CopyRegion(psc->base.dpy, pdraw->xDrawable, region,
 331                   DRI2BufferFrontLeft, DRI2BufferBackLeft);
 332    XFixesDestroyRegion(psc->base.dpy, region);
 333
 334    /* Refresh the fake front (if present) after we just damaged the real
 335     * front.
 336     */
 337    DRI2CopyRegion(psc->base.dpy, pdraw->xDrawable, region,
 338                   DRI2BufferFakeFrontLeft, DRI2BufferFrontLeft);
 339    XFixesDestroyRegion(psc->base.dpy, region);
 340 }
 341
 342 static void
 343 dri2_copy_drawable(struct dri2_drawable *priv, int dest, int src)
 344 {
 345    XRectangle xrect;
 346    XserverRegion region;
 347    struct dri2_screen *psc = (struct dri2_screen *) priv->base.psc;
 348
 349    xrect.x = 0;
 350    xrect.y = 0;
 351    xrect.width = priv->width;
 352    xrect.height = priv->height;
 353
 354 #ifdef __DRI2_FLUSH
 355    if (psc->f)
 356       (*psc->f->flush) (priv->driDrawable);
 357 #endif
 358
 359    region = XFixesCreateRegion(psc->base.dpy, &xrect, 1);
 360    DRI2CopyRegion(psc->base.dpy, priv->base.xDrawable, region, dest, src);
 361    XFixesDestroyRegion(psc->base.dpy, region);
 362
 363 }
 364
 365 static void
 366 dri2WaitX(__GLXDRIdrawable *pdraw)
 367 {
 368    struct dri2_drawable *priv = (struct dri2_drawable *) pdraw;
 369
 370    if (!priv->have_fake_front)
 371       return;
 372
 373    dri2_copy_drawable(priv, DRI2BufferFakeFrontLeft, DRI2BufferFrontLeft);
 374 }
 375
 376 static void
 377 dri2WaitGL(__GLXDRIdrawable * pdraw)
 378 {
 379    struct dri2_drawable *priv = (struct dri2_drawable *) pdraw;
 380
 381    if (!priv->have_fake_front)
 382       return;
 383
 384    dri2_copy_drawable(priv, DRI2BufferFrontLeft, DRI2BufferFakeFrontLeft);
 385 }
 386
 387 static void
 388 dri2FlushFrontBuffer(__DRIdrawable *driDrawable, void *loaderPrivate)
 389 {
 390    struct dri2_drawable *pdraw = loaderPrivate;
 391    __GLXdisplayPrivate *priv = __glXInitialize(pdraw->base.psc->dpy);
 392    struct dri2_display *pdp = (struct dri2_display *)priv->dri2Display;
 393
 394    /* Old servers don't send invalidate events */
 395    if (!pdp->invalidateAvailable)
 396        dri2InvalidateBuffers(priv->dpy, pdraw->base.drawable);
 397
 398    dri2WaitGL(loaderPrivate);
 399 }
 400
 401
 402 static void
 403 dri2DestroyScreen(__GLXscreenConfigs *base)
 404 {
 405    struct dri2_screen *psc = (struct dri2_screen *) base;
 406
 407    /* Free the direct rendering per screen data */
 408    (*psc->core->destroyScreen) (psc->driScreen);
 409    close(psc->fd);
 410    Xfree(psc);
 411 }
 412
 413 /**
 414  * Process list of buffer received from the server
 415  *
 416  * Processes the list of buffers received in a reply from the server to either
 417  * \c DRI2GetBuffers or \c DRI2GetBuffersWithFormat.
 418  */
 419 static void
 420 process_buffers(struct dri2_drawable * pdraw, DRI2Buffer * buffers,
 421                 unsigned count)
 422 {
 423    int i;
 424
 425    pdraw->bufferCount = count;
 426    pdraw->have_fake_front = 0;
 427    pdraw->have_back = 0;
 428
 429    /* This assumes the DRI2 buffer attachment tokens matches the
 430     * __DRIbuffer tokens. */
 431    for (i = 0; i < count; i++) {
 432       pdraw->buffers[i].attachment = buffers[i].attachment;
 433       pdraw->buffers[i].name = buffers[i].name;
 434       pdraw->buffers[i].pitch = buffers[i].pitch;
 435       pdraw->buffers[i].cpp = buffers[i].cpp;
 436       pdraw->buffers[i].flags = buffers[i].flags;
 437       if (pdraw->buffers[i].attachment == __DRI_BUFFER_FAKE_FRONT_LEFT)
 438          pdraw->have_fake_front = 1;
 439       if (pdraw->buffers[i].attachment == __DRI_BUFFER_BACK_LEFT)
 440          pdraw->have_back = 1;
 441    }
 442
 443 }
 444
 445 static int64_t
 446 dri2SwapBuffers(__GLXDRIdrawable *pdraw, int64_t target_msc, int64_t divisor,
 447                 int64_t remainder)
 448 {
 449     struct dri2_drawable *priv = (struct dri2_drawable *) pdraw;
 450     __GLXdisplayPrivate *dpyPriv = __glXInitialize(priv->base.psc->dpy);
 451     struct dri2_screen *psc = (struct dri2_screen *) priv->base.psc;
 452     struct dri2_display *pdp =
 453         (struct dri2_display *)dpyPriv->dri2Display;
 454     int64_t ret;
 455
 456 #ifdef __DRI2_FLUSH
 457     if (psc->f)
 458         (*psc->f->flush)(priv->driDrawable);
 459 #endif
 460
 461     /* Old servers don't send invalidate events */
 462     if (!pdp->invalidateAvailable)
 463        dri2InvalidateBuffers(dpyPriv->dpy, pdraw->drawable);
 464
 465     /* Old servers can't handle swapbuffers */
 466     if (!pdp->swapAvailable) {
 467        dri2CopySubBuffer(pdraw, 0, 0, priv->width, priv->height);
 468        return 0;
 469     }
 470
 471 #ifdef X_DRI2SwapBuffers
 472     DRI2SwapBuffers(psc->base.dpy, pdraw->xDrawable, target_msc, divisor,
 473                     remainder, &ret);
 474 #endif
 475
 476     return ret;
 477 }
 478
 479 static __DRIbuffer *
 480 dri2GetBuffers(__DRIdrawable * driDrawable,
 481                int *width, int *height,
 482                unsigned int *attachments, int count,
 483                int *out_count, void *loaderPrivate)
 484 {
 485    struct dri2_drawable *pdraw = loaderPrivate;
 486    DRI2Buffer *buffers;
 487
 488    buffers = DRI2GetBuffers(pdraw->base.psc->dpy, pdraw->base.xDrawable,
 489                             width, height, attachments, count, out_count);
 490    if (buffers == NULL)
 491       return NULL;
 492
 493    pdraw->width = *width;
 494    pdraw->height = *height;
 495    process_buffers(pdraw, buffers, *out_count);
 496
 497    Xfree(buffers);
 498
 499    return pdraw->buffers;
 500 }
 501
 502 static __DRIbuffer *
 503 dri2GetBuffersWithFormat(__DRIdrawable * driDrawable,
 504                          int *width, int *height,
 505                          unsigned int *attachments, int count,
 506                          int *out_count, void *loaderPrivate)
 507 {
 508    struct dri2_drawable *pdraw = loaderPrivate;
 509    DRI2Buffer *buffers;
 510
 511    buffers = DRI2GetBuffersWithFormat(pdraw->base.psc->dpy,
 512                                       pdraw->base.xDrawable,
 513                                       width, height, attachments,
 514                                       count, out_count);
 515    if (buffers == NULL)
 516       return NULL;
 517
 518    pdraw->width = *width;
 519    pdraw->height = *height;
 520    process_buffers(pdraw, buffers, *out_count);
 521
 522    Xfree(buffers);
 523
 524    return pdraw->buffers;
 525 }
 526
 527 #ifdef X_DRI2SwapInterval
 528
 529 static int
 530 dri2SetSwapInterval(__GLXDRIdrawable *pdraw, int interval)
 531 {
 532    struct dri2_drawable *priv =  (struct dri2_drawable *) pdraw;
 533    GLint vblank_mode = DRI_CONF_VBLANK_DEF_INTERVAL_1;
 534    struct dri2_screen *psc = (struct dri2_screen *) priv->base.psc;
 535
 536    if (psc->config)
 537       psc->config->configQueryi(psc->driScreen,
 538                                 "vblank_mode", &vblank_mode);
 539
 540    switch (vblank_mode) {
 541    case DRI_CONF_VBLANK_NEVER:
 542       return GLX_BAD_VALUE;
 543    case DRI_CONF_VBLANK_ALWAYS_SYNC:
 544       if (interval <= 0)
 545          return GLX_BAD_VALUE;
 546       break;
 547    default:
 548       break;
 549    }
 550
 551    DRI2SwapInterval(priv->base.psc->dpy, priv->base.xDrawable, interval);
 552    priv->swap_interval = interval;
 553
 554    return 0;
 555 }
 556
 557 static unsigned int
 558 dri2GetSwapInterval(__GLXDRIdrawable *pdraw)
 559 {
 560    struct dri2_drawable *priv =  (struct dri2_drawable *) pdraw;
 561
 562   return priv->swap_interval;
 563 }
 564
 565 #endif /* X_DRI2SwapInterval */
 566
 567 static const __DRIdri2LoaderExtension dri2LoaderExtension = {
 568    {__DRI_DRI2_LOADER, __DRI_DRI2_LOADER_VERSION},
 569    dri2GetBuffers,
 570    dri2FlushFrontBuffer,
 571    dri2GetBuffersWithFormat,
 572 };
 573
 574 static const __DRIdri2LoaderExtension dri2LoaderExtension_old = {
 575    {__DRI_DRI2_LOADER, __DRI_DRI2_LOADER_VERSION},
 576    dri2GetBuffers,
 577    dri2FlushFrontBuffer,
 578    NULL,
 579 };
 580
 581 #ifdef __DRI_USE_INVALIDATE
 582 static const __DRIuseInvalidateExtension dri2UseInvalidate = {
 583    { __DRI_USE_INVALIDATE, __DRI_USE_INVALIDATE_VERSION }
 584 };
 585 #endif
 586
 587 _X_HIDDEN void
 588 dri2InvalidateBuffers(Display *dpy, XID drawable)
 589 {
 590    __GLXDRIdrawable *pdraw =
 591       dri2GetGlxDrawableFromXDrawableId(dpy, drawable);
 592    struct dri2_screen *psc = (struct dri2_screen *) pdraw->psc;
 593    struct dri2_drawable *pdp = (struct dri2_drawable *) pdraw;
 594
 595 #if __DRI2_FLUSH_VERSION >= 3
 596    if (pdraw && psc->f)
 597        psc->f->invalidate(pdp->driDrawable);
 598 #endif
 599 }
 600
 601 static void
 602 dri2_bind_tex_image(Display * dpy,
 603                     GLXDrawable drawable,
 604                     int buffer, const int *attrib_list)
 605 {
 606    GLXContext gc = __glXGetCurrentContext();
 607    __GLXDRIdrawable *base = GetGLXDRIDrawable(dpy, drawable, NULL);
 608    __GLXdisplayPrivate *dpyPriv = __glXInitialize(dpy);
 609    struct dri2_drawable *pdraw = (struct dri2_drawable *) base;
 610    struct dri2_display *pdp =
 611       (struct dri2_display *) dpyPriv->dri2Display;
 612    struct dri2_screen *psc = (struct dri2_screen *) base->psc;
 613
 614    if (pdraw != NULL) {
 615
 616 #if __DRI2_FLUSH_VERSION >= 3
 617       if (!pdp->invalidateAvailable && psc->f)
 618          psc->f->invalidate(pdraw->driDrawable);
 619 #endif
 620
 621       if (psc->texBuffer->base.version >= 2 &&
 622           psc->texBuffer->setTexBuffer2 != NULL) {
 623          (*psc->texBuffer->setTexBuffer2) (gc->__driContext,
 624                                            pdraw->base.textureTarget,
 625                                            pdraw->base.textureFormat,
 626                                            pdraw->driDrawable);
 627       }
 628       else {
 629          (*psc->texBuffer->setTexBuffer) (gc->__driContext,
 630                                           pdraw->base.textureTarget,
 631                                           pdraw->driDrawable);
 632       }
 633    }
 634 }
 635
 636 static void
 637 dri2_release_tex_image(Display * dpy, GLXDrawable drawable, int buffer)
 638 {
 639 }
 640
 641 static const struct glx_context_vtable dri2_context_vtable = {
 642    dri2_bind_tex_image,
 643    dri2_release_tex_image,
 644 };
 645
 646 static void
 647 dri2BindExtensions(struct dri2_screen *psc, const __DRIextension **extensions)
 648 {
 649    int i;
 650
 651    __glXEnableDirectExtension(&psc->base, "GLX_SGI_video_sync");
 652    __glXEnableDirectExtension(&psc->base, "GLX_SGI_swap_control");
 653    __glXEnableDirectExtension(&psc->base, "GLX_MESA_swap_control");
 654
 655    /* FIXME: if DRI2 version supports it... */
 656    __glXEnableDirectExtension(&psc->base, "INTEL_swap_event");
 657
 658    for (i = 0; extensions[i]; i++) {
 659       if ((strcmp(extensions[i]->name, __DRI_TEX_BUFFER) == 0)) {
 660          psc->texBuffer = (__DRItexBufferExtension *) extensions[i];
 661          __glXEnableDirectExtension(&psc->base, "GLX_EXT_texture_from_pixmap");
 662       }
 663
 664       if ((strcmp(extensions[i]->name, __DRI2_FLUSH) == 0)) {
 665          psc->f = (__DRI2flushExtension *) extensions[i];
 666          /* internal driver extension, no GL extension exposed */
 667       }
 668
 669       if ((strcmp(extensions[i]->name, __DRI2_CONFIG_QUERY) == 0))
 670          psc->config = (__DRI2configQueryExtension *) extensions[i];
 671    }
 672 }
 673
 674
 675 static __GLXscreenConfigs *
 676 dri2CreateScreen(int screen, __GLXdisplayPrivate * priv)
 677 {
 678    const __DRIconfig **driver_configs;
 679    const __DRIextension **extensions;
 680    const struct dri2_display *const pdp = (struct dri2_display *)
 681       priv->dri2Display;
 682    struct dri2_screen *psc;
 683    __GLXDRIscreen *psp;
 684    char *driverName, *deviceName;
 685    drm_magic_t magic;
 686    int i;
 687
 688    psc = Xmalloc(sizeof *psc);
 689    if (psc == NULL)
 690       return NULL;
 691
 692    memset(psc, 0, sizeof *psc);
 693    if (!glx_screen_init(&psc->base, screen, priv))
 694        return NULL;
 695
 696    if (!DRI2Connect(priv->dpy, RootWindow(priv->dpy, screen),
 697                     &driverName, &deviceName)) {
 698       XFree(psc);
 699       return NULL;
 700    }
 701
 702    psc->driver = driOpenDriver(driverName);
 703    if (psc->driver == NULL) {
 704       ErrorMessageF("driver pointer missing\n");
 705       goto handle_error;
 706    }
 707
 708    extensions = dlsym(psc->driver, __DRI_DRIVER_EXTENSIONS);
 709    if (extensions == NULL) {
 710       ErrorMessageF("driver exports no extensions (%s)\n", dlerror());
 711       goto handle_error;
 712    }
 713
 714    for (i = 0; extensions[i]; i++) {
 715       if (strcmp(extensions[i]->name, __DRI_CORE) == 0)
 716          psc->core = (__DRIcoreExtension *) extensions[i];
 717       if (strcmp(extensions[i]->name, __DRI_DRI2) == 0)
 718          psc->dri2 = (__DRIdri2Extension *) extensions[i];
 719    }
 720
 721    if (psc->core == NULL || psc->dri2 == NULL) {
 722       ErrorMessageF("core dri or dri2 extension not found\n");
 723       goto handle_error;
 724    }
 725
 726    psc->fd = open(deviceName, O_RDWR);
 727    if (psc->fd < 0) {
 728       ErrorMessageF("failed to open drm device: %s\n", strerror(errno));
 729       goto handle_error;
 730    }
 731
 732    if (drmGetMagic(psc->fd, &magic)) {
 733       ErrorMessageF("failed to get magic\n");
 734       goto handle_error;
 735    }
 736
 737    if (!DRI2Authenticate(priv->dpy, RootWindow(priv->dpy, screen), magic)) {
 738       ErrorMessageF("failed to authenticate magic %d\n", magic);
 739       goto handle_error;
 740    }
 741
 742
 743    /* If the server does not support the protocol for
 744     * DRI2GetBuffersWithFormat, don't supply that interface to the driver.
 745     */
 746    psc->driScreen =
 747       psc->dri2->createNewScreen(screen, psc->fd,
 748                                  (const __DRIextension **)
 749                                  &pdp->loader_extensions[0],
 750                                  &driver_configs, psc);
 751
 752    if (psc->driScreen == NULL) {
 753       ErrorMessageF("failed to create dri screen\n");
 754       goto handle_error;
 755    }
 756
 757    extensions = psc->core->getExtensions(psc->driScreen);
 758    driBindCommonExtensions(&psc->base, extensions);
 759    dri2BindExtensions(psc, extensions);
 760
 761    psc->base.configs =
 762       driConvertConfigs(psc->core, psc->base.configs, driver_configs);
 763    psc->base.visuals =
 764       driConvertConfigs(psc->core, psc->base.visuals, driver_configs);
 765
 766    psc->base.driver_configs = driver_configs;
 767
 768    psp = &psc->vtable;
 769    psc->base.driScreen = psp;
 770    psp->destroyScreen = dri2DestroyScreen;
 771    psp->createContext = dri2CreateContext;
 772    psp->createDrawable = dri2CreateDrawable;
 773    psp->swapBuffers = dri2SwapBuffers;
 774    psp->waitGL = dri2WaitGL;
 775    psp->waitX = dri2WaitX;
 776    psp->getDrawableMSC = NULL;
 777    psp->waitForMSC = NULL;
 778    psp->waitForSBC = NULL;
 779    psp->setSwapInterval = NULL;
 780    psp->getSwapInterval = NULL;
 781
 782    if (pdp->driMinor >= 2) {
 783 #ifdef X_DRI2GetMSC
 784       psp->getDrawableMSC = dri2DrawableGetMSC;
 785 #endif
 786 #ifdef X_DRI2WaitMSC
 787       psp->waitForMSC = dri2WaitForMSC;
 788       psp->waitForSBC = dri2WaitForSBC;
 789 #endif
 790 #ifdef X_DRI2SwapInterval
 791       psp->setSwapInterval = dri2SetSwapInterval;
 792       psp->getSwapInterval = dri2GetSwapInterval;
 793 #endif
 794 #if defined(X_DRI2GetMSC) && defined(X_DRI2WaitMSC) && defined(X_DRI2SwapInterval)
 795       __glXEnableDirectExtension(&psc->base, "GLX_OML_sync_control");
 796 #endif
 797    }
 798
 799    /* DRI2 suports SubBuffer through DRI2CopyRegion, so it's always
 800     * available.*/
 801    psp->copySubBuffer = dri2CopySubBuffer;
 802    __glXEnableDirectExtension(&psc->base, "GLX_MESA_copy_sub_buffer");
 803
 804    psc->base.direct_context_vtable = &dri2_context_vtable;
 805
 806    Xfree(driverName);
 807    Xfree(deviceName);
 808
 809    return &psc->base;
 810
 811 handle_error:
 812    Xfree(driverName);
 813    Xfree(deviceName);
 814    XFree(psc);
 815
 816    /* FIXME: clean up here */
 817
 818    return NULL;
 819 }
 820
 821 /* Called from __glXFreeDisplayPrivate.
 822  */
 823 static void
 824 dri2DestroyDisplay(__GLXDRIdisplay * dpy)
 825 {
 826    Xfree(dpy);
 827 }
 828
 829 _X_HIDDEN __GLXDRIdrawable *
 830 dri2GetGlxDrawableFromXDrawableId(Display *dpy, XID id)
 831 {
 832    __GLXdisplayPrivate *d = __glXInitialize(dpy);
 833    struct dri2_display *pdp = (struct dri2_display *) d->dri2Display;
 834    __GLXDRIdrawable *pdraw;
 835
 836    if (__glxHashLookup(pdp->dri2Hash, id, (void *) &pdraw) == 0)
 837       return pdraw;
 838
 839    return NULL;
 840 }
 841
 842 /*
 843  * Allocate, initialize and return a __DRIdisplayPrivate object.
 844  * This is called from __glXInitialize() when we are given a new
 845  * display pointer.
 846  */
 847 _X_HIDDEN __GLXDRIdisplay *
 848 dri2CreateDisplay(Display * dpy)
 849 {
 850    struct dri2_display *pdp;
 851    int eventBase, errorBase, i;
 852
 853    if (!DRI2QueryExtension(dpy, &eventBase, &errorBase))
 854       return NULL;
 855
 856    pdp = Xmalloc(sizeof *pdp);
 857    if (pdp == NULL)
 858       return NULL;
 859
 860    if (!DRI2QueryVersion(dpy, &pdp->driMajor, &pdp->driMinor)) {
 861       Xfree(pdp);
 862       return NULL;
 863    }
 864
 865    pdp->driPatch = 0;
 866    pdp->swapAvailable = (pdp->driMinor >= 2);
 867    pdp->invalidateAvailable = (pdp->driMinor >= 3);
 868
 869    pdp->base.destroyDisplay = dri2DestroyDisplay;
 870    pdp->base.createScreen = dri2CreateScreen;
 871
 872    i = 0;
 873    if (pdp->driMinor < 1)
 874       pdp->loader_extensions[i++] = &dri2LoaderExtension_old.base;
 875    else
 876       pdp->loader_extensions[i++] = &dri2LoaderExtension.base;
 877
 878    pdp->loader_extensions[i++] = &systemTimeExtension.base;
 879
 880 #ifdef __DRI_USE_INVALIDATE
 881    pdp->loader_extensions[i++] = &dri2UseInvalidate.base;
 882 #endif
 883    pdp->loader_extensions[i++] = NULL;
 884
 885    pdp->dri2Hash = __glxHashCreate();
 886    if (pdp->dri2Hash == NULL) {
 887       Xfree(pdp);
 888       return NULL;
 889    }
 890
 891    return &pdp->base;
 892 }
 893
 894 #endif /* GLX_DIRECT_RENDERING */