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    struct glx_screen 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    const __DRIconfig **driver_configs;
  90
  91    void *driver;
  92    int fd;
  93 };
  94
  95 struct dri2_context
  96 {
  97    struct glx_context base;
  98    __DRIcontext *driContext;
  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 const struct glx_context_vtable dri2_context_vtable;
 114
 115 static void
 116 dri2_destroy_context(struct glx_context *context)
 117 {
 118    struct dri2_context *pcp = (struct dri2_context *) context;
 119    struct dri2_screen *psc = (struct dri2_screen *) context->psc;
 120
 121    driReleaseDrawables(&pcp->base);
 122
 123    if (context->xid)
 124       glx_send_destroy_context(psc->base.dpy, context->xid);
 125
 126    if (context->extensions)
 127       XFree((char *) context->extensions);
 128
 129    (*psc->core->destroyContext) (pcp->driContext);
 130
 131    Xfree(pcp);
 132 }
 133
 134 static Bool
 135 dri2_bind_context(struct glx_context *context, struct glx_context *old,
 136                   GLXDrawable draw, GLXDrawable read)
 137 {
 138    struct dri2_context *pcp = (struct dri2_context *) context;
 139    struct dri2_screen *psc = (struct dri2_screen *) pcp->base.psc;
 140    struct dri2_drawable *pdraw, *pread;
 141    struct dri2_display *pdp;
 142
 143    pdraw = (struct dri2_drawable *) driFetchDrawable(context, draw);
 144    pread = (struct dri2_drawable *) driFetchDrawable(context, read);
 145
 146    driReleaseDrawables(&pcp->base);
 147
 148    if (pdraw == NULL || pread == NULL)
 149       return GLXBadDrawable;
 150
 151    if (!(*psc->core->bindContext) (pcp->driContext,
 152                                    pdraw->driDrawable, pread->driDrawable))
 153       return GLXBadContext;
 154
 155    /* If the server doesn't send invalidate events, we may miss a
 156     * resize before the rendering starts.  Invalidate the buffers now
 157     * so the driver will recheck before rendering starts. */
 158    pdp = (struct dri2_display *) psc->base.display;
 159    if (!pdp->invalidateAvailable) {
 160       dri2InvalidateBuffers(psc->base.dpy, pdraw->base.xDrawable);
 161       if (pread != pdraw)
 162          dri2InvalidateBuffers(psc->base.dpy, pread->base.xDrawable);
 163    }
 164
 165    return Success;
 166 }
 167
 168 static void
 169 dri2_unbind_context(struct glx_context *context, struct glx_context *new)
 170 {
 171    struct dri2_context *pcp = (struct dri2_context *) context;
 172    struct dri2_screen *psc = (struct dri2_screen *) pcp->base.psc;
 173
 174    (*psc->core->unbindContext) (pcp->driContext);
 175 }
 176
 177 static struct glx_context *
 178 dri2_create_context(struct glx_screen *base,
 179                     struct glx_config *config_base,
 180                     struct glx_context *shareList, int renderType)
 181 {
 182    struct dri2_context *pcp, *pcp_shared;
 183    struct dri2_screen *psc = (struct dri2_screen *) base;
 184    __GLXDRIconfigPrivate *config = (__GLXDRIconfigPrivate *) config_base;
 185    __DRIcontext *shared = NULL;
 186
 187    if (shareList) {
 188       pcp_shared = (struct dri2_context *) shareList;
 189       shared = pcp_shared->driContext;
 190    }
 191
 192    pcp = Xmalloc(sizeof *pcp);
 193    if (pcp == NULL)
 194       return NULL;
 195
 196    memset(pcp, 0, sizeof *pcp);
 197    if (!glx_context_init(&pcp->base, &psc->base, &config->base)) {
 198       Xfree(pcp);
 199       return NULL;
 200    }
 201
 202    pcp->driContext =
 203       (*psc->dri2->createNewContext) (psc->driScreen,
 204                                       config->driConfig, shared, pcp);
 205
 206    if (pcp->driContext == NULL) {
 207       Xfree(pcp);
 208       return NULL;
 209    }
 210
 211    pcp->base.vtable = &dri2_context_vtable;
 212
 213    return &pcp->base;
 214 }
 215
 216 static void
 217 dri2DestroyDrawable(__GLXDRIdrawable *base)
 218 {
 219    struct dri2_screen *psc = (struct dri2_screen *) base->psc;
 220    struct dri2_drawable *pdraw = (struct dri2_drawable *) base;
 221    struct glx_display *dpyPriv = psc->base.display;
 222    struct dri2_display *pdp = (struct dri2_display *)dpyPriv->dri2Display;
 223
 224    __glxHashDelete(pdp->dri2Hash, pdraw->base.xDrawable);
 225    (*psc->core->destroyDrawable) (pdraw->driDrawable);
 226
 227    /* If it's a GLX 1.3 drawables, we can destroy the DRI2 drawable
 228     * now, as the application explicitly asked to destroy the GLX
 229     * drawable.  Otherwise, for legacy drawables, we let the DRI2
 230     * drawable linger on the server, since there's no good way of
 231     * knowing when the application is done with it.  The server will
 232     * destroy the DRI2 drawable when it destroys the X drawable or the
 233     * client exits anyway. */
 234    if (pdraw->base.xDrawable != pdraw->base.drawable)
 235       DRI2DestroyDrawable(psc->base.dpy, pdraw->base.xDrawable);
 236
 237    Xfree(pdraw);
 238 }
 239
 240 static __GLXDRIdrawable *
 241 dri2CreateDrawable(struct glx_screen *base, XID xDrawable,
 242                    GLXDrawable drawable, struct glx_config *config_base)
 243 {
 244    struct dri2_drawable *pdraw;
 245    struct dri2_screen *psc = (struct dri2_screen *) base;
 246    __GLXDRIconfigPrivate *config = (__GLXDRIconfigPrivate *) config_base;
 247    struct glx_display *dpyPriv;
 248    struct dri2_display *pdp;
 249    GLint vblank_mode = DRI_CONF_VBLANK_DEF_INTERVAL_1;
 250
 251    pdraw = Xmalloc(sizeof(*pdraw));
 252    if (!pdraw)
 253       return NULL;
 254
 255    memset(pdraw, 0, sizeof *pdraw);
 256    pdraw->base.destroyDrawable = dri2DestroyDrawable;
 257    pdraw->base.xDrawable = xDrawable;
 258    pdraw->base.drawable = drawable;
 259    pdraw->base.psc = &psc->base;
 260    pdraw->bufferCount = 0;
 261    pdraw->swap_interval = 1; /* default may be overridden below */
 262    pdraw->have_back = 0;
 263
 264    if (psc->config)
 265       psc->config->configQueryi(psc->driScreen,
 266                                 "vblank_mode", &vblank_mode);
 267
 268    switch (vblank_mode) {
 269    case DRI_CONF_VBLANK_NEVER:
 270    case DRI_CONF_VBLANK_DEF_INTERVAL_0:
 271       pdraw->swap_interval = 0;
 272       break;
 273    case DRI_CONF_VBLANK_DEF_INTERVAL_1:
 274    case DRI_CONF_VBLANK_ALWAYS_SYNC:
 275    default:
 276       pdraw->swap_interval = 1;
 277       break;
 278    }
 279
 280    DRI2CreateDrawable(psc->base.dpy, xDrawable);
 281
 282    dpyPriv = __glXInitialize(psc->base.dpy);
 283    pdp = (struct dri2_display *)dpyPriv->dri2Display;;
 284    /* Create a new drawable */
 285    pdraw->driDrawable =
 286       (*psc->dri2->createNewDrawable) (psc->driScreen,
 287                                        config->driConfig, pdraw);
 288
 289    if (!pdraw->driDrawable) {
 290       DRI2DestroyDrawable(psc->base.dpy, xDrawable);
 291       Xfree(pdraw);
 292       return NULL;
 293    }
 294
 295    if (__glxHashInsert(pdp->dri2Hash, xDrawable, pdraw)) {
 296       (*psc->core->destroyDrawable) (pdraw->driDrawable);
 297       DRI2DestroyDrawable(psc->base.dpy, xDrawable);
 298       Xfree(pdraw);
 299       return None;
 300    }
 301
 302
 303 #ifdef X_DRI2SwapInterval
 304    /*
 305     * Make sure server has the same swap interval we do for the new
 306     * drawable.
 307     */
 308    if (pdp->swapAvailable)
 309       DRI2SwapInterval(psc->base.dpy, xDrawable, pdraw->swap_interval);
 310 #endif
 311
 312    return &pdraw->base;
 313 }
 314
 315 #ifdef X_DRI2GetMSC
 316
 317 static int
 318 dri2DrawableGetMSC(struct glx_screen *psc, __GLXDRIdrawable *pdraw,
 319                    int64_t *ust, int64_t *msc, int64_t *sbc)
 320 {
 321    CARD64 dri2_ust, dri2_msc, dri2_sbc;
 322    int ret;
 323
 324    ret = DRI2GetMSC(psc->dpy, pdraw->xDrawable,
 325                     &dri2_ust, &dri2_msc, &dri2_sbc);
 326    *ust = dri2_ust;
 327    *msc = dri2_msc;
 328    *sbc = dri2_sbc;
 329
 330    return ret;
 331 }
 332
 333 #endif
 334
 335
 336 #ifdef X_DRI2WaitMSC
 337
 338 static int
 339 dri2WaitForMSC(__GLXDRIdrawable *pdraw, int64_t target_msc, int64_t divisor,
 340                int64_t remainder, int64_t *ust, int64_t *msc, int64_t *sbc)
 341 {
 342    CARD64 dri2_ust, dri2_msc, dri2_sbc;
 343    int ret;
 344
 345    ret = DRI2WaitMSC(pdraw->psc->dpy, pdraw->xDrawable, target_msc, divisor,
 346                      remainder, &dri2_ust, &dri2_msc, &dri2_sbc);
 347    *ust = dri2_ust;
 348    *msc = dri2_msc;
 349    *sbc = dri2_sbc;
 350
 351    return ret;
 352 }
 353
 354 static int
 355 dri2WaitForSBC(__GLXDRIdrawable *pdraw, int64_t target_sbc, int64_t *ust,
 356                int64_t *msc, int64_t *sbc)
 357 {
 358    CARD64 dri2_ust, dri2_msc, dri2_sbc;
 359    int ret;
 360
 361    ret = DRI2WaitSBC(pdraw->psc->dpy, pdraw->xDrawable,
 362                      target_sbc, &dri2_ust, &dri2_msc, &dri2_sbc);
 363    *ust = dri2_ust;
 364    *msc = dri2_msc;
 365    *sbc = dri2_sbc;
 366
 367    return ret;
 368 }
 369
 370 #endif /* X_DRI2WaitMSC */
 371
 372 static void
 373 dri2CopySubBuffer(__GLXDRIdrawable *pdraw, int x, int y, int width, int height)
 374 {
 375    struct dri2_drawable *priv = (struct dri2_drawable *) pdraw;
 376    struct dri2_screen *psc = (struct dri2_screen *) pdraw->psc;
 377    XRectangle xrect;
 378    XserverRegion region;
 379
 380    /* Check we have the right attachments */
 381    if (!priv->have_back)
 382       return;
 383
 384    xrect.x = x;
 385    xrect.y = priv->height - y - height;
 386    xrect.width = width;
 387    xrect.height = height;
 388
 389 #ifdef __DRI2_FLUSH
 390    if (psc->f)
 391       (*psc->f->flush) (priv->driDrawable);
 392 #endif
 393
 394    region = XFixesCreateRegion(psc->base.dpy, &xrect, 1);
 395    DRI2CopyRegion(psc->base.dpy, pdraw->xDrawable, region,
 396                   DRI2BufferFrontLeft, DRI2BufferBackLeft);
 397
 398    /* Refresh the fake front (if present) after we just damaged the real
 399     * front.
 400     */
 401    if (priv->have_fake_front)
 402       DRI2CopyRegion(psc->base.dpy, pdraw->xDrawable, region,
 403                      DRI2BufferFakeFrontLeft, DRI2BufferFrontLeft);
 404
 405    XFixesDestroyRegion(psc->base.dpy, region);
 406 }
 407
 408 static void
 409 dri2_copy_drawable(struct dri2_drawable *priv, int dest, int src)
 410 {
 411    XRectangle xrect;
 412    XserverRegion region;
 413    struct dri2_screen *psc = (struct dri2_screen *) priv->base.psc;
 414
 415    xrect.x = 0;
 416    xrect.y = 0;
 417    xrect.width = priv->width;
 418    xrect.height = priv->height;
 419
 420 #ifdef __DRI2_FLUSH
 421    if (psc->f)
 422       (*psc->f->flush) (priv->driDrawable);
 423 #endif
 424
 425    region = XFixesCreateRegion(psc->base.dpy, &xrect, 1);
 426    DRI2CopyRegion(psc->base.dpy, priv->base.xDrawable, region, dest, src);
 427    XFixesDestroyRegion(psc->base.dpy, region);
 428
 429 }
 430
 431 static void
 432 dri2_wait_x(struct glx_context *gc)
 433 {
 434    struct dri2_drawable *priv = (struct dri2_drawable *)
 435       GetGLXDRIDrawable(gc->currentDpy, gc->currentDrawable);
 436
 437    if (priv == NULL || !priv->have_fake_front)
 438       return;
 439
 440    dri2_copy_drawable(priv, DRI2BufferFakeFrontLeft, DRI2BufferFrontLeft);
 441 }
 442
 443 static void
 444 dri2_wait_gl(struct glx_context *gc)
 445 {
 446    struct dri2_drawable *priv = (struct dri2_drawable *)
 447       GetGLXDRIDrawable(gc->currentDpy, gc->currentDrawable);
 448
 449    if (priv == NULL || !priv->have_fake_front)
 450       return;
 451
 452    dri2_copy_drawable(priv, DRI2BufferFrontLeft, DRI2BufferFakeFrontLeft);
 453 }
 454
 455 static void
 456 dri2FlushFrontBuffer(__DRIdrawable *driDrawable, void *loaderPrivate)
 457 {
 458    struct dri2_drawable *pdraw = loaderPrivate;
 459    if (!pdraw)
 460       return;
 461
 462    if (!pdraw->base.psc)
 463       return;
 464
 465    struct glx_display *priv = __glXInitialize(pdraw->base.psc->dpy);
 466    struct dri2_display *pdp = (struct dri2_display *)priv->dri2Display;
 467    struct glx_context *gc = __glXGetCurrentContext();
 468
 469    /* Old servers don't send invalidate events */
 470    if (!pdp->invalidateAvailable)
 471        dri2InvalidateBuffers(priv->dpy, pdraw->base.xDrawable);
 472
 473    dri2_wait_gl(gc);
 474 }
 475
 476
 477 static void
 478 dri2DestroyScreen(struct glx_screen *base)
 479 {
 480    struct dri2_screen *psc = (struct dri2_screen *) base;
 481
 482    /* Free the direct rendering per screen data */
 483    (*psc->core->destroyScreen) (psc->driScreen);
 484    driDestroyConfigs(psc->driver_configs);
 485    close(psc->fd);
 486    Xfree(psc);
 487 }
 488
 489 /**
 490  * Process list of buffer received from the server
 491  *
 492  * Processes the list of buffers received in a reply from the server to either
 493  * \c DRI2GetBuffers or \c DRI2GetBuffersWithFormat.
 494  */
 495 static void
 496 process_buffers(struct dri2_drawable * pdraw, DRI2Buffer * buffers,
 497                 unsigned count)
 498 {
 499    int i;
 500
 501    pdraw->bufferCount = count;
 502    pdraw->have_fake_front = 0;
 503    pdraw->have_back = 0;
 504
 505    /* This assumes the DRI2 buffer attachment tokens matches the
 506     * __DRIbuffer tokens. */
 507    for (i = 0; i < count; i++) {
 508       pdraw->buffers[i].attachment = buffers[i].attachment;
 509       pdraw->buffers[i].name = buffers[i].name;
 510       pdraw->buffers[i].pitch = buffers[i].pitch;
 511       pdraw->buffers[i].cpp = buffers[i].cpp;
 512       pdraw->buffers[i].flags = buffers[i].flags;
 513       if (pdraw->buffers[i].attachment == __DRI_BUFFER_FAKE_FRONT_LEFT)
 514          pdraw->have_fake_front = 1;
 515       if (pdraw->buffers[i].attachment == __DRI_BUFFER_BACK_LEFT)
 516          pdraw->have_back = 1;
 517    }
 518
 519 }
 520
 521 unsigned dri2GetSwapEventType(Display* dpy, XID drawable)
 522 {
 523       struct glx_display *glx_dpy = __glXInitialize(dpy);
 524       __GLXDRIdrawable *pdraw;
 525       pdraw = dri2GetGlxDrawableFromXDrawableId(dpy, drawable);
 526       if (!pdraw || !(pdraw->eventMask & GLX_BUFFER_SWAP_COMPLETE_INTEL_MASK))
 527          return 0;
 528       return glx_dpy->codes->first_event + GLX_BufferSwapComplete;
 529 }
 530
 531 static int64_t
 532 dri2SwapBuffers(__GLXDRIdrawable *pdraw, int64_t target_msc, int64_t divisor,
 533                 int64_t remainder)
 534 {
 535     struct dri2_drawable *priv = (struct dri2_drawable *) pdraw;
 536     struct glx_display *dpyPriv = __glXInitialize(priv->base.psc->dpy);
 537     struct dri2_screen *psc = (struct dri2_screen *) priv->base.psc;
 538     struct dri2_display *pdp =
 539         (struct dri2_display *)dpyPriv->dri2Display;
 540     CARD64 ret = 0;
 541
 542 #ifdef __DRI2_FLUSH
 543     if (psc->f) {
 544        struct glx_context *gc = __glXGetCurrentContext();
 545
 546        if (gc) {
 547           (*psc->f->flush)(priv->driDrawable);
 548        }
 549     }
 550 #endif
 551
 552     /* Old servers don't send invalidate events */
 553     if (!pdp->invalidateAvailable)
 554        dri2InvalidateBuffers(dpyPriv->dpy, pdraw->xDrawable);
 555
 556     /* Old servers can't handle swapbuffers */
 557     if (!pdp->swapAvailable) {
 558        dri2CopySubBuffer(pdraw, 0, 0, priv->width, priv->height);
 559        return 0;
 560     }
 561
 562 #ifdef X_DRI2SwapBuffers
 563     DRI2SwapBuffers(psc->base.dpy, pdraw->xDrawable, target_msc, divisor,
 564                     remainder, &ret);
 565 #endif
 566
 567     return ret;
 568 }
 569
 570 static __DRIbuffer *
 571 dri2GetBuffers(__DRIdrawable * driDrawable,
 572                int *width, int *height,
 573                unsigned int *attachments, int count,
 574                int *out_count, void *loaderPrivate)
 575 {
 576    struct dri2_drawable *pdraw = loaderPrivate;
 577    DRI2Buffer *buffers;
 578
 579    buffers = DRI2GetBuffers(pdraw->base.psc->dpy, pdraw->base.xDrawable,
 580                             width, height, attachments, count, out_count);
 581    if (buffers == NULL)
 582       return NULL;
 583
 584    pdraw->width = *width;
 585    pdraw->height = *height;
 586    process_buffers(pdraw, buffers, *out_count);
 587
 588    Xfree(buffers);
 589
 590    return pdraw->buffers;
 591 }
 592
 593 static __DRIbuffer *
 594 dri2GetBuffersWithFormat(__DRIdrawable * driDrawable,
 595                          int *width, int *height,
 596                          unsigned int *attachments, int count,
 597                          int *out_count, void *loaderPrivate)
 598 {
 599    struct dri2_drawable *pdraw = loaderPrivate;
 600    DRI2Buffer *buffers;
 601
 602    buffers = DRI2GetBuffersWithFormat(pdraw->base.psc->dpy,
 603                                       pdraw->base.xDrawable,
 604                                       width, height, attachments,
 605                                       count, out_count);
 606    if (buffers == NULL)
 607       return NULL;
 608
 609    pdraw->width = *width;
 610    pdraw->height = *height;
 611    process_buffers(pdraw, buffers, *out_count);
 612
 613    Xfree(buffers);
 614
 615    return pdraw->buffers;
 616 }
 617
 618 #ifdef X_DRI2SwapInterval
 619
 620 static int
 621 dri2SetSwapInterval(__GLXDRIdrawable *pdraw, int interval)
 622 {
 623    struct dri2_drawable *priv =  (struct dri2_drawable *) pdraw;
 624    GLint vblank_mode = DRI_CONF_VBLANK_DEF_INTERVAL_1;
 625    struct dri2_screen *psc = (struct dri2_screen *) priv->base.psc;
 626
 627    if (psc->config)
 628       psc->config->configQueryi(psc->driScreen,
 629                                 "vblank_mode", &vblank_mode);
 630
 631    switch (vblank_mode) {
 632    case DRI_CONF_VBLANK_NEVER:
 633       return GLX_BAD_VALUE;
 634    case DRI_CONF_VBLANK_ALWAYS_SYNC:
 635       if (interval <= 0)
 636          return GLX_BAD_VALUE;
 637       break;
 638    default:
 639       break;
 640    }
 641
 642    DRI2SwapInterval(priv->base.psc->dpy, priv->base.xDrawable, interval);
 643    priv->swap_interval = interval;
 644
 645    return 0;
 646 }
 647
 648 static int
 649 dri2GetSwapInterval(__GLXDRIdrawable *pdraw)
 650 {
 651    struct dri2_drawable *priv =  (struct dri2_drawable *) pdraw;
 652
 653   return priv->swap_interval;
 654 }
 655
 656 #endif /* X_DRI2SwapInterval */
 657
 658 static const __DRIdri2LoaderExtension dri2LoaderExtension = {
 659    {__DRI_DRI2_LOADER, __DRI_DRI2_LOADER_VERSION},
 660    dri2GetBuffers,
 661    dri2FlushFrontBuffer,
 662    dri2GetBuffersWithFormat,
 663 };
 664
 665 static const __DRIdri2LoaderExtension dri2LoaderExtension_old = {
 666    {__DRI_DRI2_LOADER, __DRI_DRI2_LOADER_VERSION},
 667    dri2GetBuffers,
 668    dri2FlushFrontBuffer,
 669    NULL,
 670 };
 671
 672 #ifdef __DRI_USE_INVALIDATE
 673 static const __DRIuseInvalidateExtension dri2UseInvalidate = {
 674    { __DRI_USE_INVALIDATE, __DRI_USE_INVALIDATE_VERSION }
 675 };
 676 #endif
 677
 678 _X_HIDDEN void
 679 dri2InvalidateBuffers(Display *dpy, XID drawable)
 680 {
 681    __GLXDRIdrawable *pdraw =
 682       dri2GetGlxDrawableFromXDrawableId(dpy, drawable);
 683    struct dri2_screen *psc;
 684    struct dri2_drawable *pdp = (struct dri2_drawable *) pdraw;
 685
 686    if (!pdraw)
 687       return;
 688
 689    psc = (struct dri2_screen *) pdraw->psc;
 690
 691 #if __DRI2_FLUSH_VERSION >= 3
 692    if (pdraw && psc->f && psc->f->base.version >= 3 && psc->f->invalidate)
 693        psc->f->invalidate(pdp->driDrawable);
 694 #endif
 695 }
 696
 697 static void
 698 dri2_bind_tex_image(Display * dpy,
 699                     GLXDrawable drawable,
 700                     int buffer, const int *attrib_list)
 701 {
 702    struct glx_context *gc = __glXGetCurrentContext();
 703    struct dri2_context *pcp = (struct dri2_context *) gc;
 704    __GLXDRIdrawable *base = GetGLXDRIDrawable(dpy, drawable);
 705    struct glx_display *dpyPriv = __glXInitialize(dpy);
 706    struct dri2_drawable *pdraw = (struct dri2_drawable *) base;
 707    struct dri2_display *pdp =
 708       (struct dri2_display *) dpyPriv->dri2Display;
 709    struct dri2_screen *psc;
 710
 711    if (pdraw != NULL) {
 712       psc = (struct dri2_screen *) base->psc;
 713
 714 #if __DRI2_FLUSH_VERSION >= 3
 715       if (!pdp->invalidateAvailable && psc->f &&
 716            psc->f->base.version >= 3 && psc->f->invalidate)
 717          psc->f->invalidate(pdraw->driDrawable);
 718 #endif
 719
 720       if (psc->texBuffer->base.version >= 2 &&
 721           psc->texBuffer->setTexBuffer2 != NULL) {
 722          (*psc->texBuffer->setTexBuffer2) (pcp->driContext,
 723                                            pdraw->base.textureTarget,
 724                                            pdraw->base.textureFormat,
 725                                            pdraw->driDrawable);
 726       }
 727       else {
 728          (*psc->texBuffer->setTexBuffer) (pcp->driContext,
 729                                           pdraw->base.textureTarget,
 730                                           pdraw->driDrawable);
 731       }
 732    }
 733 }
 734
 735 static void
 736 dri2_release_tex_image(Display * dpy, GLXDrawable drawable, int buffer)
 737 {
 738 #if __DRI_TEX_BUFFER_VERSION >= 3
 739    struct glx_context *gc = __glXGetCurrentContext();
 740    struct dri2_context *pcp = (struct dri2_context *) gc;
 741    __GLXDRIdrawable *base = GetGLXDRIDrawable(dpy, drawable);
 742    struct glx_display *dpyPriv = __glXInitialize(dpy);
 743    struct dri2_drawable *pdraw = (struct dri2_drawable *) base;
 744    struct dri2_display *pdp =
 745       (struct dri2_display *) dpyPriv->dri2Display;
 746    struct dri2_screen *psc;
 747
 748    if (pdraw != NULL) {
 749       psc = (struct dri2_screen *) base->psc;
 750
 751       if (psc->texBuffer->base.version >= 3 &&
 752           psc->texBuffer->releaseTexBuffer != NULL) {
 753          (*psc->texBuffer->releaseTexBuffer) (pcp->driContext,
 754                                            pdraw->base.textureTarget,
 755                                            pdraw->driDrawable);
 756       }
 757    }
 758 #endif
 759 }
 760
 761 static const struct glx_context_vtable dri2_context_vtable = {
 762    dri2_destroy_context,
 763    dri2_bind_context,
 764    dri2_unbind_context,
 765    dri2_wait_gl,
 766    dri2_wait_x,
 767    DRI_glXUseXFont,
 768    dri2_bind_tex_image,
 769    dri2_release_tex_image,
 770    NULL, /* get_proc_address */
 771 };
 772
 773 static void
 774 dri2BindExtensions(struct dri2_screen *psc, const __DRIextension **extensions)
 775 {
 776    int i;
 777
 778    __glXEnableDirectExtension(&psc->base, "GLX_SGI_video_sync");
 779    __glXEnableDirectExtension(&psc->base, "GLX_SGI_swap_control");
 780    __glXEnableDirectExtension(&psc->base, "GLX_MESA_swap_control");
 781    __glXEnableDirectExtension(&psc->base, "GLX_SGI_make_current_read");
 782
 783    /* FIXME: if DRI2 version supports it... */
 784    __glXEnableDirectExtension(&psc->base, "INTEL_swap_event");
 785
 786    for (i = 0; extensions[i]; i++) {
 787       if ((strcmp(extensions[i]->name, __DRI_TEX_BUFFER) == 0)) {
 788          psc->texBuffer = (__DRItexBufferExtension *) extensions[i];
 789          __glXEnableDirectExtension(&psc->base, "GLX_EXT_texture_from_pixmap");
 790       }
 791
 792       if ((strcmp(extensions[i]->name, __DRI2_FLUSH) == 0)) {
 793          psc->f = (__DRI2flushExtension *) extensions[i];
 794          /* internal driver extension, no GL extension exposed */
 795       }
 796
 797       if ((strcmp(extensions[i]->name, __DRI2_CONFIG_QUERY) == 0))
 798          psc->config = (__DRI2configQueryExtension *) extensions[i];
 799    }
 800 }
 801
 802 static const struct glx_screen_vtable dri2_screen_vtable = {
 803    dri2_create_context
 804 };
 805
 806 static struct glx_screen *
 807 dri2CreateScreen(int screen, struct glx_display * priv)
 808 {
 809    const __DRIconfig **driver_configs;
 810    const __DRIextension **extensions;
 811    const struct dri2_display *const pdp = (struct dri2_display *)
 812       priv->dri2Display;
 813    struct dri2_screen *psc;
 814    __GLXDRIscreen *psp;
 815    char *driverName, *deviceName;
 816    drm_magic_t magic;
 817    int i;
 818
 819    psc = Xmalloc(sizeof *psc);
 820    if (psc == NULL)
 821       return NULL;
 822
 823    memset(psc, 0, sizeof *psc);
 824    psc->fd = -1;
 825
 826    if (!glx_screen_init(&psc->base, screen, priv)) {
 827       Xfree(psc);
 828       return NULL;
 829    }
 830
 831    if (!DRI2Connect(priv->dpy, RootWindow(priv->dpy, screen),
 832                     &driverName, &deviceName)) {
 833       glx_screen_cleanup(&psc->base);
 834       XFree(psc);
 835       return NULL;
 836    }
 837
 838    psc->driver = driOpenDriver(driverName);
 839    if (psc->driver == NULL) {
 840       ErrorMessageF("driver pointer missing\n");
 841       goto handle_error;
 842    }
 843
 844    extensions = dlsym(psc->driver, __DRI_DRIVER_EXTENSIONS);
 845    if (extensions == NULL) {
 846       ErrorMessageF("driver exports no extensions (%s)\n", dlerror());
 847       goto handle_error;
 848    }
 849
 850    for (i = 0; extensions[i]; i++) {
 851       if (strcmp(extensions[i]->name, __DRI_CORE) == 0)
 852          psc->core = (__DRIcoreExtension *) extensions[i];
 853       if (strcmp(extensions[i]->name, __DRI_DRI2) == 0)
 854          psc->dri2 = (__DRIdri2Extension *) extensions[i];
 855    }
 856
 857    if (psc->core == NULL || psc->dri2 == NULL) {
 858       ErrorMessageF("core dri or dri2 extension not found\n");
 859       goto handle_error;
 860    }
 861
 862    psc->fd = open(deviceName, O_RDWR);
 863    if (psc->fd < 0) {
 864       ErrorMessageF("failed to open drm device: %s\n", strerror(errno));
 865       goto handle_error;
 866    }
 867
 868    if (drmGetMagic(psc->fd, &magic)) {
 869       ErrorMessageF("failed to get magic\n");
 870       goto handle_error;
 871    }
 872
 873    if (!DRI2Authenticate(priv->dpy, RootWindow(priv->dpy, screen), magic)) {
 874       ErrorMessageF("failed to authenticate magic %d\n", magic);
 875       goto handle_error;
 876    }
 877
 878
 879    /* If the server does not support the protocol for
 880     * DRI2GetBuffersWithFormat, don't supply that interface to the driver.
 881     */
 882    psc->driScreen =
 883       psc->dri2->createNewScreen(screen, psc->fd,
 884                                  (const __DRIextension **)
 885                                  &pdp->loader_extensions[0],
 886                                  &driver_configs, psc);
 887
 888    if (psc->driScreen == NULL) {
 889       ErrorMessageF("failed to create dri screen\n");
 890       goto handle_error;
 891    }
 892
 893    extensions = psc->core->getExtensions(psc->driScreen);
 894    dri2BindExtensions(psc, extensions);
 895
 896    psc->base.configs =
 897       driConvertConfigs(psc->core, psc->base.configs, driver_configs);
 898    psc->base.visuals =
 899       driConvertConfigs(psc->core, psc->base.visuals, driver_configs);
 900
 901    psc->driver_configs = driver_configs;
 902
 903    psc->base.vtable = &dri2_screen_vtable;
 904    psp = &psc->vtable;
 905    psc->base.driScreen = psp;
 906    psp->destroyScreen = dri2DestroyScreen;
 907    psp->createDrawable = dri2CreateDrawable;
 908    psp->swapBuffers = dri2SwapBuffers;
 909    psp->getDrawableMSC = NULL;
 910    psp->waitForMSC = NULL;
 911    psp->waitForSBC = NULL;
 912    psp->setSwapInterval = NULL;
 913    psp->getSwapInterval = NULL;
 914
 915    if (pdp->driMinor >= 2) {
 916 #ifdef X_DRI2GetMSC
 917       psp->getDrawableMSC = dri2DrawableGetMSC;
 918 #endif
 919 #ifdef X_DRI2WaitMSC
 920       psp->waitForMSC = dri2WaitForMSC;
 921       psp->waitForSBC = dri2WaitForSBC;
 922 #endif
 923 #ifdef X_DRI2SwapInterval
 924       psp->setSwapInterval = dri2SetSwapInterval;
 925       psp->getSwapInterval = dri2GetSwapInterval;
 926 #endif
 927 #if defined(X_DRI2GetMSC) && defined(X_DRI2WaitMSC) && defined(X_DRI2SwapInterval)
 928       __glXEnableDirectExtension(&psc->base, "GLX_OML_sync_control");
 929 #endif
 930    }
 931
 932    /* DRI2 suports SubBuffer through DRI2CopyRegion, so it's always
 933     * available.*/
 934    psp->copySubBuffer = dri2CopySubBuffer;
 935    __glXEnableDirectExtension(&psc->base, "GLX_MESA_copy_sub_buffer");
 936
 937    Xfree(driverName);
 938    Xfree(deviceName);
 939
 940    return &psc->base;
 941
 942 handle_error:
 943    if (psc->fd >= 0)
 944       close(psc->fd);
 945    if (psc->driver)
 946       dlclose(psc->driver);
 947    Xfree(driverName);
 948    Xfree(deviceName);
 949    glx_screen_cleanup(&psc->base);
 950    XFree(psc);
 951
 952    return NULL;
 953 }
 954
 955 /* Called from __glXFreeDisplayPrivate.
 956  */
 957 static void
 958 dri2DestroyDisplay(__GLXDRIdisplay * dpy)
 959 {
 960    struct dri2_display *pdp = (struct dri2_display *) dpy;
 961
 962    __glxHashDestroy(pdp->dri2Hash);
 963    Xfree(dpy);
 964 }
 965
 966 _X_HIDDEN __GLXDRIdrawable *
 967 dri2GetGlxDrawableFromXDrawableId(Display *dpy, XID id)
 968 {
 969    struct glx_display *d = __glXInitialize(dpy);
 970    struct dri2_display *pdp = (struct dri2_display *) d->dri2Display;
 971    __GLXDRIdrawable *pdraw;
 972
 973    if (__glxHashLookup(pdp->dri2Hash, id, (void *) &pdraw) == 0)
 974       return pdraw;
 975
 976    return NULL;
 977 }
 978
 979 /*
 980  * Allocate, initialize and return a __DRIdisplayPrivate object.
 981  * This is called from __glXInitialize() when we are given a new
 982  * display pointer.
 983  */
 984 _X_HIDDEN __GLXDRIdisplay *
 985 dri2CreateDisplay(Display * dpy)
 986 {
 987    struct dri2_display *pdp;
 988    int eventBase, errorBase, i;
 989
 990    if (!DRI2QueryExtension(dpy, &eventBase, &errorBase))
 991       return NULL;
 992
 993    pdp = Xmalloc(sizeof *pdp);
 994    if (pdp == NULL)
 995       return NULL;
 996
 997    if (!DRI2QueryVersion(dpy, &pdp->driMajor, &pdp->driMinor)) {
 998       Xfree(pdp);
 999       return NULL;
1000    }
1001
1002    pdp->driPatch = 0;
1003    pdp->swapAvailable = (pdp->driMinor >= 2);
1004    pdp->invalidateAvailable = (pdp->driMinor >= 3);
1005
1006    pdp->base.destroyDisplay = dri2DestroyDisplay;
1007    pdp->base.createScreen = dri2CreateScreen;
1008
1009    i = 0;
1010    if (pdp->driMinor < 1)
1011       pdp->loader_extensions[i++] = &dri2LoaderExtension_old.base;
1012    else
1013       pdp->loader_extensions[i++] = &dri2LoaderExtension.base;
1014
1015    pdp->loader_extensions[i++] = &systemTimeExtension.base;
1016
1017 #ifdef __DRI_USE_INVALIDATE
1018    pdp->loader_extensions[i++] = &dri2UseInvalidate.base;
1019 #endif
1020    pdp->loader_extensions[i++] = NULL;
1021
1022    pdp->dri2Hash = __glxHashCreate();
1023    if (pdp->dri2Hash == NULL) {
1024       Xfree(pdp);
1025       return NULL;
1026    }
1027
1028    return &pdp->base;
1029 }
1030
1031 #endif /* GLX_DIRECT_RENDERING */