src/mesa/drivers/dri/common/dri_util.c

   1 /*
   2  * (C) Copyright IBM Corporation 2002, 2004
   3  * All Rights Reserved.
   4  *
   5  * Permission is hereby granted, free of charge, to any person obtaining a
   6  * copy of this software and associated documentation files (the "Software"),
   7  * to deal in the Software without restriction, including without limitation
   8  * on the rights to use, copy, modify, merge, publish, distribute, sub
   9  * license, and/or sell copies of the Software, and to permit persons to whom
  10  * the Software is furnished to do so, subject to the following conditions:
  11  *
  12  * The above copyright notice and this permission notice (including the next
  13  * paragraph) shall be included in all copies or substantial portions of the
  14  * Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.  IN NO EVENT SHALL
  19  * THE AUTHORS AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM,
  20  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
  21  * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
  22  * USE OR OTHER DEALINGS IN THE SOFTWARE.
  23  */
  24
  25 /**
  26  * \file dri_util.c
  27  * DRI utility functions.
  28  *
  29  * This module acts as glue between GLX and the actual hardware driver.  A DRI
  30  * driver doesn't really \e have to use any of this - it's optional.  But, some
  31  * useful stuff is done here that otherwise would have to be duplicated in most
  32  * drivers.
  33  *
  34  * Basically, these utility functions take care of some of the dirty details of
  35  * screen initialization, context creation, context binding, DRM setup, etc.
  36  *
  37  * These functions are compiled into each DRI driver so libGL.so knows nothing
  38  * about them.
  39  */
  40
  41
  42 #include <stdbool.h>
  43 #ifndef __NOT_HAVE_DRM_H
  44 #include <xf86drm.h>
  45 #endif
  46 #include "dri_util.h"
  47 #include "utils.h"
  48 #include "xmlpool.h"
  49 #include "../glsl/glsl_parser_extras.h"
  50 #include "main/mtypes.h"
  51 #include "main/version.h"
  52 #include "main/macros.h"
  53
  54 PUBLIC const char __dri2ConfigOptions[] =
  55    DRI_CONF_BEGIN
  56       DRI_CONF_SECTION_PERFORMANCE
  57          DRI_CONF_VBLANK_MODE(DRI_CONF_VBLANK_DEF_INTERVAL_1)
  58       DRI_CONF_SECTION_END
  59    DRI_CONF_END;
  60
  61 /*****************************************************************/
  62 /** \name Screen handling functions                              */
  63 /*****************************************************************/
  64 /*@{*/
  65
  66 static void
  67 setupLoaderExtensions(__DRIscreen *psp,
  68                       const __DRIextension **extensions)
  69 {
  70     int i;
  71
  72     for (i = 0; extensions[i]; i++) {
  73         if (strcmp(extensions[i]->name, __DRI_DRI2_LOADER) == 0)
  74             psp->dri2.loader = (__DRIdri2LoaderExtension *) extensions[i];
  75         if (strcmp(extensions[i]->name, __DRI_IMAGE_LOOKUP) == 0)
  76             psp->dri2.image = (__DRIimageLookupExtension *) extensions[i];
  77         if (strcmp(extensions[i]->name, __DRI_USE_INVALIDATE) == 0)
  78             psp->dri2.useInvalidate = (__DRIuseInvalidateExtension *) extensions[i];
  79         if (strcmp(extensions[i]->name, __DRI_SWRAST_LOADER) == 0)
  80             psp->swrast_loader = (__DRIswrastLoaderExtension *) extensions[i];
  81     }
  82 }
  83
  84 /**
  85  * This is the first entrypoint in the driver called by the DRI driver loader
  86  * after dlopen()ing it.
  87  *
  88  * It's used to create global state for the driver across contexts on the same
  89  * Display.
  90  */
  91 static __DRIscreen *
  92 dri2CreateNewScreen2(int scrn, int fd,
  93                      const __DRIextension **extensions,
  94                      const __DRIextension **driver_extensions,
  95                      const __DRIconfig ***driver_configs, void *data)
  96 {
  97     static const __DRIextension *emptyExtensionList[] = { NULL };
  98     __DRIscreen *psp;
  99
 100     psp = calloc(1, sizeof(*psp));
 101     if (!psp)
 102         return NULL;
 103
 104     psp->driver = &driDriverAPI;
 105
 106     setupLoaderExtensions(psp, extensions);
 107
 108 #ifndef __NOT_HAVE_DRM_H
 109     if (fd != -1) {
 110        drmVersionPtr version = drmGetVersion(fd);
 111        if (version) {
 112           psp->drm_version.major = version->version_major;
 113           psp->drm_version.minor = version->version_minor;
 114           psp->drm_version.patch = version->version_patchlevel;
 115           drmFreeVersion(version);
 116        }
 117     }
 118 #endif
 119
 120     psp->loaderPrivate = data;
 121
 122     psp->extensions = emptyExtensionList;
 123     psp->fd = fd;
 124     psp->myNum = scrn;
 125
 126     *driver_configs = psp->driver->InitScreen(psp);
 127     if (*driver_configs == NULL) {
 128         free(psp);
 129         return NULL;
 130     }
 131
 132     int gl_version_override = _mesa_get_gl_version_override();
 133     if (gl_version_override >= 31) {
 134        psp->max_gl_core_version = MAX2(psp->max_gl_core_version,
 135                                        gl_version_override);
 136     } else {
 137        psp->max_gl_compat_version = MAX2(psp->max_gl_compat_version,
 138                                          gl_version_override);
 139     }
 140
 141     psp->api_mask = (1 << __DRI_API_OPENGL);
 142     if (psp->max_gl_core_version > 0)
 143        psp->api_mask |= (1 << __DRI_API_OPENGL_CORE);
 144     if (psp->max_gl_es1_version > 0)
 145        psp->api_mask |= (1 << __DRI_API_GLES);
 146     if (psp->max_gl_es2_version > 0)
 147        psp->api_mask |= (1 << __DRI_API_GLES2);
 148     if (psp->max_gl_es2_version >= 30)
 149        psp->api_mask |= (1 << __DRI_API_GLES3);
 150
 151     driParseOptionInfo(&psp->optionInfo, __dri2ConfigOptions);
 152     driParseConfigFiles(&psp->optionCache, &psp->optionInfo, psp->myNum, "dri2");
 153
 154
 155     return psp;
 156 }
 157
 158 static __DRIscreen *
 159 dri2CreateNewScreen(int scrn, int fd,
 160                     const __DRIextension **extensions,
 161                     const __DRIconfig ***driver_configs, void *data)
 162 {
 163    return dri2CreateNewScreen2(scrn, fd, extensions, NULL,
 164                                driver_configs, data);
 165 }
 166
 167 /** swrast driver createNewScreen entrypoint. */
 168 static __DRIscreen *
 169 driSWRastCreateNewScreen(int scrn, const __DRIextension **extensions,
 170                          const __DRIconfig ***driver_configs, void *data)
 171 {
 172    return dri2CreateNewScreen2(scrn, -1, extensions, NULL,
 173                                driver_configs, data);
 174 }
 175
 176 static __DRIscreen *
 177 driSWRastCreateNewScreen2(int scrn, const __DRIextension **extensions,
 178                           const __DRIextension **driver_extensions,
 179                           const __DRIconfig ***driver_configs, void *data)
 180 {
 181    return dri2CreateNewScreen2(scrn, -1, extensions, driver_extensions,
 182                                driver_configs, data);
 183 }
 184
 185 /**
 186  * Destroy the per-screen private information.
 187  *
 188  * \internal
 189  * This function calls __DriverAPIRec::DestroyScreen on \p screenPrivate, calls
 190  * drmClose(), and finally frees \p screenPrivate.
 191  */
 192 static void driDestroyScreen(__DRIscreen *psp)
 193 {
 194     if (psp) {
 195         /* No interaction with the X-server is possible at this point.  This
 196          * routine is called after XCloseDisplay, so there is no protocol
 197          * stream open to the X-server anymore.
 198          */
 199
 200        _mesa_destroy_shader_compiler();
 201
 202         psp->driver->DestroyScreen(psp);
 203
 204         driDestroyOptionCache(&psp->optionCache);
 205         driDestroyOptionInfo(&psp->optionInfo);
 206
 207         free(psp);
 208     }
 209 }
 210
 211 static const __DRIextension **driGetExtensions(__DRIscreen *psp)
 212 {
 213     return psp->extensions;
 214 }
 215
 216 /*@}*/
 217
 218
 219 static bool
 220 validate_context_version(__DRIscreen *screen,
 221                          int mesa_api,
 222                          unsigned major_version,
 223                          unsigned minor_version,
 224                          unsigned *dri_ctx_error)
 225 {
 226    unsigned req_version = 10 * major_version + minor_version;
 227    unsigned max_version = 0;
 228
 229    switch (mesa_api) {
 230    case API_OPENGL_COMPAT:
 231       max_version = screen->max_gl_compat_version;
 232       break;
 233    case API_OPENGL_CORE:
 234       max_version = screen->max_gl_core_version;
 235       break;
 236    case API_OPENGLES:
 237       max_version = screen->max_gl_es1_version;
 238       break;
 239    case API_OPENGLES2:
 240       max_version = screen->max_gl_es2_version;
 241       break;
 242    default:
 243       max_version = 0;
 244       break;
 245    }
 246
 247    if (max_version == 0) {
 248       *dri_ctx_error = __DRI_CTX_ERROR_BAD_API;
 249       return false;
 250    } else if (req_version > max_version) {
 251       *dri_ctx_error = __DRI_CTX_ERROR_BAD_VERSION;
 252       return false;
 253    }
 254
 255    return true;
 256 }
 257
 258 /*****************************************************************/
 259 /** \name Context handling functions                             */
 260 /*****************************************************************/
 261 /*@{*/
 262
 263 static __DRIcontext *
 264 dri2CreateContextAttribs(__DRIscreen *screen, int api,
 265                          const __DRIconfig *config,
 266                          __DRIcontext *shared,
 267                          unsigned num_attribs,
 268                          const uint32_t *attribs,
 269                          unsigned *error,
 270                          void *data)
 271 {
 272     __DRIcontext *context;
 273     const struct gl_config *modes = (config != NULL) ? &config->modes : NULL;
 274     void *shareCtx = (shared != NULL) ? shared->driverPrivate : NULL;
 275     gl_api mesa_api;
 276     unsigned major_version = 1;
 277     unsigned minor_version = 0;
 278     uint32_t flags = 0;
 279
 280     assert((num_attribs == 0) || (attribs != NULL));
 281
 282     if (!(screen->api_mask & (1 << api))) {
 283         *error = __DRI_CTX_ERROR_BAD_API;
 284         return NULL;
 285     }
 286
 287     switch (api) {
 288     case __DRI_API_OPENGL:
 289         mesa_api = API_OPENGL_COMPAT;
 290         break;
 291     case __DRI_API_GLES:
 292         mesa_api = API_OPENGLES;
 293         break;
 294     case __DRI_API_GLES2:
 295     case __DRI_API_GLES3:
 296         mesa_api = API_OPENGLES2;
 297         break;
 298     case __DRI_API_OPENGL_CORE:
 299         mesa_api = API_OPENGL_CORE;
 300         break;
 301     default:
 302         *error = __DRI_CTX_ERROR_BAD_API;
 303         return NULL;
 304     }
 305
 306     for (unsigned i = 0; i < num_attribs; i++) {
 307         switch (attribs[i * 2]) {
 308         case __DRI_CTX_ATTRIB_MAJOR_VERSION:
 309             major_version = attribs[i * 2 + 1];
 310             break;
 311         case __DRI_CTX_ATTRIB_MINOR_VERSION:
 312             minor_version = attribs[i * 2 + 1];
 313             break;
 314         case __DRI_CTX_ATTRIB_FLAGS:
 315             flags = attribs[i * 2 + 1];
 316             break;
 317         default:
 318             /* We can't create a context that satisfies the requirements of an
 319              * attribute that we don't understand.  Return failure.
 320              */
 321             assert(!"Should not get here.");
 322             *error = __DRI_CTX_ERROR_UNKNOWN_ATTRIBUTE;
 323             return NULL;
 324         }
 325     }
 326
 327     /* Mesa does not support the GL_ARB_compatibilty extension or the
 328      * compatibility profile.  This means that we treat a API_OPENGL_COMPAT 3.1 as
 329      * API_OPENGL_CORE and reject API_OPENGL_COMPAT 3.2+.
 330      */
 331     if (mesa_api == API_OPENGL_COMPAT && major_version == 3 && minor_version == 1)
 332        mesa_api = API_OPENGL_CORE;
 333
 334     if (mesa_api == API_OPENGL_COMPAT
 335         && ((major_version > 3)
 336             || (major_version == 3 && minor_version >= 2))) {
 337        *error = __DRI_CTX_ERROR_BAD_API;
 338        return NULL;
 339     }
 340
 341     /* The EGL_KHR_create_context spec says:
 342      *
 343      *     "Flags are only defined for OpenGL context creation, and specifying
 344      *     a flags value other than zero for other types of contexts,
 345      *     including OpenGL ES contexts, will generate an error."
 346      *
 347      * The GLX_EXT_create_context_es2_profile specification doesn't say
 348      * anything specific about this case.  However, none of the known flags
 349      * have any meaning in an ES context, so this seems safe.
 350      */
 351     if (mesa_api != API_OPENGL_COMPAT
 352         && mesa_api != API_OPENGL_CORE
 353         && flags != 0) {
 354         *error = __DRI_CTX_ERROR_BAD_FLAG;
 355         return NULL;
 356     }
 357
 358     /* There are no forward-compatible contexts before OpenGL 3.0.  The
 359      * GLX_ARB_create_context spec says:
 360      *
 361      *     "Forward-compatible contexts are defined only for OpenGL versions
 362      *     3.0 and later."
 363      *
 364      * Forward-looking contexts are supported by silently converting the
 365      * requested API to API_OPENGL_CORE.
 366      *
 367      * In Mesa, a debug context is the same as a regular context.
 368      */
 369     if ((flags & __DRI_CTX_FLAG_FORWARD_COMPATIBLE) != 0) {
 370        mesa_api = API_OPENGL_CORE;
 371     }
 372
 373     if ((flags & ~(__DRI_CTX_FLAG_DEBUG | __DRI_CTX_FLAG_FORWARD_COMPATIBLE))
 374         != 0) {
 375         *error = __DRI_CTX_ERROR_UNKNOWN_FLAG;
 376         return NULL;
 377     }
 378
 379     if (!validate_context_version(screen, mesa_api,
 380                                   major_version, minor_version, error))
 381        return NULL;
 382
 383     context = calloc(1, sizeof *context);
 384     if (!context) {
 385         *error = __DRI_CTX_ERROR_NO_MEMORY;
 386         return NULL;
 387     }
 388
 389     context->loaderPrivate = data;
 390
 391     context->driScreenPriv = screen;
 392     context->driDrawablePriv = NULL;
 393     context->driReadablePriv = NULL;
 394
 395     if (!screen->driver->CreateContext(mesa_api, modes, context,
 396                                        major_version, minor_version,
 397                                        flags, error, shareCtx) ) {
 398         free(context);
 399         return NULL;
 400     }
 401
 402     struct gl_context *ctx = context->driverPrivate;
 403     if ((flags & __DRI_CTX_FLAG_FORWARD_COMPATIBLE) != 0)
 404         ctx->Const.ContextFlags |= GL_CONTEXT_FLAG_FORWARD_COMPATIBLE_BIT;
 405     if ((flags & __DRI_CTX_FLAG_DEBUG) != 0) {
 406         ctx->Const.ContextFlags |= GL_CONTEXT_FLAG_DEBUG_BIT;
 407         ctx->Debug.DebugOutput = GL_TRUE;
 408     }
 409
 410     *error = __DRI_CTX_ERROR_SUCCESS;
 411     return context;
 412 }
 413
 414 static __DRIcontext *
 415 dri2CreateNewContextForAPI(__DRIscreen *screen, int api,
 416                            const __DRIconfig *config,
 417                            __DRIcontext *shared, void *data)
 418 {
 419     unsigned error;
 420
 421     return dri2CreateContextAttribs(screen, api, config, shared, 0, NULL,
 422                                     &error, data);
 423 }
 424
 425 static __DRIcontext *
 426 dri2CreateNewContext(__DRIscreen *screen, const __DRIconfig *config,
 427                       __DRIcontext *shared, void *data)
 428 {
 429     return dri2CreateNewContextForAPI(screen, __DRI_API_OPENGL,
 430                                       config, shared, data);
 431 }
 432
 433 /**
 434  * Destroy the per-context private information.
 435  *
 436  * \internal
 437  * This function calls __DriverAPIRec::DestroyContext on \p contextPrivate, calls
 438  * drmDestroyContext(), and finally frees \p contextPrivate.
 439  */
 440 static void
 441 driDestroyContext(__DRIcontext *pcp)
 442 {
 443     if (pcp) {
 444         pcp->driScreenPriv->driver->DestroyContext(pcp);
 445         free(pcp);
 446     }
 447 }
 448
 449 static int
 450 driCopyContext(__DRIcontext *dest, __DRIcontext *src, unsigned long mask)
 451 {
 452     (void) dest;
 453     (void) src;
 454     (void) mask;
 455     return GL_FALSE;
 456 }
 457
 458 /*@}*/
 459
 460
 461 /*****************************************************************/
 462 /** \name Context (un)binding functions                          */
 463 /*****************************************************************/
 464 /*@{*/
 465
 466 static void dri_get_drawable(__DRIdrawable *pdp);
 467 static void dri_put_drawable(__DRIdrawable *pdp);
 468
 469 /**
 470  * This function takes both a read buffer and a draw buffer.  This is needed
 471  * for \c glXMakeCurrentReadSGI or GLX 1.3's \c glXMakeContextCurrent
 472  * function.
 473  */
 474 static int driBindContext(__DRIcontext *pcp,
 475                           __DRIdrawable *pdp,
 476                           __DRIdrawable *prp)
 477 {
 478     /*
 479     ** Assume error checking is done properly in glXMakeCurrent before
 480     ** calling driUnbindContext.
 481     */
 482
 483     if (!pcp)
 484         return GL_FALSE;
 485
 486     /* Bind the drawable to the context */
 487     pcp->driDrawablePriv = pdp;
 488     pcp->driReadablePriv = prp;
 489     if (pdp) {
 490         pdp->driContextPriv = pcp;
 491         dri_get_drawable(pdp);
 492     }
 493     if (prp && pdp != prp) {
 494         dri_get_drawable(prp);
 495     }
 496
 497     return pcp->driScreenPriv->driver->MakeCurrent(pcp, pdp, prp);
 498 }
 499
 500 /**
 501  * Unbind context.
 502  *
 503  * \param scrn the screen.
 504  * \param gc context.
 505  *
 506  * \return \c GL_TRUE on success, or \c GL_FALSE on failure.
 507  *
 508  * \internal
 509  * This function calls __DriverAPIRec::UnbindContext, and then decrements
 510  * __DRIdrawableRec::refcount which must be non-zero for a successful
 511  * return.
 512  *
 513  * While casting the opaque private pointers associated with the parameters
 514  * into their respective real types it also assures they are not \c NULL.
 515  */
 516 static int driUnbindContext(__DRIcontext *pcp)
 517 {
 518     __DRIdrawable *pdp;
 519     __DRIdrawable *prp;
 520
 521     /*
 522     ** Assume error checking is done properly in glXMakeCurrent before
 523     ** calling driUnbindContext.
 524     */
 525
 526     if (pcp == NULL)
 527         return GL_FALSE;
 528
 529     pdp = pcp->driDrawablePriv;
 530     prp = pcp->driReadablePriv;
 531
 532     /* already unbound */
 533     if (!pdp && !prp)
 534         return GL_TRUE;
 535
 536     pcp->driScreenPriv->driver->UnbindContext(pcp);
 537
 538     assert(pdp);
 539     if (pdp->refcount == 0) {
 540         /* ERROR!!! */
 541         return GL_FALSE;
 542     }
 543
 544     dri_put_drawable(pdp);
 545
 546     if (prp != pdp) {
 547         if (prp->refcount == 0) {
 548             /* ERROR!!! */
 549             return GL_FALSE;
 550         }
 551
 552         dri_put_drawable(prp);
 553     }
 554
 555     pcp->driDrawablePriv = NULL;
 556     pcp->driReadablePriv = NULL;
 557
 558     return GL_TRUE;
 559 }
 560
 561 /*@}*/
 562
 563
 564 static void dri_get_drawable(__DRIdrawable *pdp)
 565 {
 566     pdp->refcount++;
 567 }
 568
 569 static void dri_put_drawable(__DRIdrawable *pdp)
 570 {
 571     if (pdp) {
 572         pdp->refcount--;
 573         if (pdp->refcount)
 574             return;
 575
 576         pdp->driScreenPriv->driver->DestroyBuffer(pdp);
 577         free(pdp);
 578     }
 579 }
 580
 581 static __DRIdrawable *
 582 dri2CreateNewDrawable(__DRIscreen *screen,
 583                       const __DRIconfig *config,
 584                       void *data)
 585 {
 586     __DRIdrawable *pdraw;
 587
 588     pdraw = malloc(sizeof *pdraw);
 589     if (!pdraw)
 590         return NULL;
 591
 592     pdraw->loaderPrivate = data;
 593
 594     pdraw->driScreenPriv = screen;
 595     pdraw->driContextPriv = NULL;
 596     pdraw->refcount = 0;
 597     pdraw->lastStamp = 0;
 598     pdraw->w = 0;
 599     pdraw->h = 0;
 600
 601     dri_get_drawable(pdraw);
 602
 603     if (!screen->driver->CreateBuffer(screen, pdraw, &config->modes,
 604                                       GL_FALSE)) {
 605        free(pdraw);
 606        return NULL;
 607     }
 608
 609     pdraw->dri2.stamp = pdraw->lastStamp + 1;
 610
 611     return pdraw;
 612 }
 613
 614 static void
 615 driDestroyDrawable(__DRIdrawable *pdp)
 616 {
 617     dri_put_drawable(pdp);
 618 }
 619
 620 static __DRIbuffer *
 621 dri2AllocateBuffer(__DRIscreen *screen,
 622                    unsigned int attachment, unsigned int format,
 623                    int width, int height)
 624 {
 625     return screen->driver->AllocateBuffer(screen, attachment, format,
 626                                           width, height);
 627 }
 628
 629 static void
 630 dri2ReleaseBuffer(__DRIscreen *screen, __DRIbuffer *buffer)
 631 {
 632     screen->driver->ReleaseBuffer(screen, buffer);
 633 }
 634
 635
 636 static int
 637 dri2ConfigQueryb(__DRIscreen *screen, const char *var, GLboolean *val)
 638 {
 639    if (!driCheckOption(&screen->optionCache, var, DRI_BOOL))
 640       return -1;
 641
 642    *val = driQueryOptionb(&screen->optionCache, var);
 643
 644    return 0;
 645 }
 646
 647 static int
 648 dri2ConfigQueryi(__DRIscreen *screen, const char *var, GLint *val)
 649 {
 650    if (!driCheckOption(&screen->optionCache, var, DRI_INT) &&
 651        !driCheckOption(&screen->optionCache, var, DRI_ENUM))
 652       return -1;
 653
 654     *val = driQueryOptioni(&screen->optionCache, var);
 655
 656     return 0;
 657 }
 658
 659 static int
 660 dri2ConfigQueryf(__DRIscreen *screen, const char *var, GLfloat *val)
 661 {
 662    if (!driCheckOption(&screen->optionCache, var, DRI_FLOAT))
 663       return -1;
 664
 665     *val = driQueryOptionf(&screen->optionCache, var);
 666
 667     return 0;
 668 }
 669
 670 static unsigned int
 671 dri2GetAPIMask(__DRIscreen *screen)
 672 {
 673     return screen->api_mask;
 674 }
 675
 676 /**
 677  * swrast swapbuffers entrypoint.
 678  *
 679  * DRI2 implements this inside the loader with only flushes handled by the
 680  * driver.
 681  */
 682 static void
 683 driSwapBuffers(__DRIdrawable *pdp)
 684 {
 685     assert(pdp->driScreenPriv->swrast_loader);
 686
 687     pdp->driScreenPriv->driver->SwapBuffers(pdp);
 688 }
 689
 690 /** Core interface */
 691 const __DRIcoreExtension driCoreExtension = {
 692     .base = { __DRI_CORE, __DRI_CORE_VERSION },
 693
 694     .createNewScreen            = NULL,
 695     .destroyScreen              = driDestroyScreen,
 696     .getExtensions              = driGetExtensions,
 697     .getConfigAttrib            = driGetConfigAttrib,
 698     .indexConfigAttrib          = driIndexConfigAttrib,
 699     .createNewDrawable          = NULL,
 700     .destroyDrawable            = driDestroyDrawable,
 701     .swapBuffers                = driSwapBuffers, /* swrast */
 702     .createNewContext           = dri2CreateNewContext, /* swrast */
 703     .copyContext                = driCopyContext,
 704     .destroyContext             = driDestroyContext,
 705     .bindContext                = driBindContext,
 706     .unbindContext              = driUnbindContext
 707 };
 708
 709 /** DRI2 interface */
 710 const __DRIdri2Extension driDRI2Extension = {
 711     .base = { __DRI_DRI2, 4 },
 712
 713     .createNewScreen            = dri2CreateNewScreen,
 714     .createNewDrawable          = dri2CreateNewDrawable,
 715     .createNewContext           = dri2CreateNewContext,
 716     .getAPIMask                 = dri2GetAPIMask,
 717     .createNewContextForAPI     = dri2CreateNewContextForAPI,
 718     .allocateBuffer             = dri2AllocateBuffer,
 719     .releaseBuffer              = dri2ReleaseBuffer,
 720     .createContextAttribs       = dri2CreateContextAttribs,
 721     .createNewScreen2           = dri2CreateNewScreen2,
 722 };
 723
 724 const __DRIswrastExtension driSWRastExtension = {
 725     { __DRI_SWRAST, 4 },
 726     driSWRastCreateNewScreen,
 727     dri2CreateNewDrawable,
 728     dri2CreateNewContextForAPI,
 729     dri2CreateContextAttribs,
 730     driSWRastCreateNewScreen2,
 731 };
 732
 733 const __DRI2configQueryExtension dri2ConfigQueryExtension = {
 734    .base = { __DRI2_CONFIG_QUERY, __DRI2_CONFIG_QUERY_VERSION },
 735
 736    .configQueryb        = dri2ConfigQueryb,
 737    .configQueryi        = dri2ConfigQueryi,
 738    .configQueryf        = dri2ConfigQueryf,
 739 };
 740
 741 void
 742 dri2InvalidateDrawable(__DRIdrawable *drawable)
 743 {
 744     drawable->dri2.stamp++;
 745 }
 746
 747 /**
 748  * Check that the gl_framebuffer associated with dPriv is the right size.
 749  * Resize the gl_framebuffer if needed.
 750  * It's expected that the dPriv->driverPrivate member points to a
 751  * gl_framebuffer object.
 752  */
 753 void
 754 driUpdateFramebufferSize(struct gl_context *ctx, const __DRIdrawable *dPriv)
 755 {
 756    struct gl_framebuffer *fb = (struct gl_framebuffer *) dPriv->driverPrivate;
 757    if (fb && (dPriv->w != fb->Width || dPriv->h != fb->Height)) {
 758       ctx->Driver.ResizeBuffers(ctx, fb, dPriv->w, dPriv->h);
 759       /* if the driver needs the hw lock for ResizeBuffers, the drawable
 760          might have changed again by now */
 761       assert(fb->Width == dPriv->w);
 762       assert(fb->Height == dPriv->h);
 763    }
 764 }