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 #ifdef HAVE_LIBDRM
  44 #include <xf86drm.h>
  45 #endif
  46 #include "dri_util.h"
  47 #include "utils.h"
  48 #include "xmlpool.h"
  49 #include "main/mtypes.h"
  50 #include "main/version.h"
  51 #include "main/errors.h"
  52 #include "main/macros.h"
  53
  54 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         if (strcmp(extensions[i]->name, __DRI_IMAGE_LOADER) == 0)
  82            psp->image.loader = (__DRIimageLoaderExtension *) extensions[i];
  83     }
  84 }
  85
  86 /**
  87  * This pointer determines which driver API we'll use in the case of the
  88  * loader not passing us an explicit driver extensions list (that would,
  89  * itself, contain a pointer to a driver API.)
  90  *
  91  * A driver's driDriverGetExtensions_drivername() can update this pointer to
  92  * what it's returning, and a loader that is ignorant of createNewScreen2()
  93  * will get the correct driver screen created, as long as no other
  94  * driDriverGetExtensions() happened in between the first one and the
  95  * createNewScreen().
  96  *
  97  * This allows the X Server to not require the significant dri_interface.h
  98  * updates for doing createNewScreen2(), which would discourage backporting of
  99  * the X Server patches to support the new loader interface.
 100  */
 101 const struct __DriverAPIRec *globalDriverAPI = &driDriverAPI;
 102
 103 /**
 104  * This is the first entrypoint in the driver called by the DRI driver loader
 105  * after dlopen()ing it.
 106  *
 107  * It's used to create global state for the driver across contexts on the same
 108  * Display.
 109  */
 110 static __DRIscreen *
 111 driCreateNewScreen2(int scrn, int fd,
 112                     const __DRIextension **extensions,
 113                     const __DRIextension **driver_extensions,
 114                     const __DRIconfig ***driver_configs, void *data)
 115 {
 116     static const __DRIextension *emptyExtensionList[] = { NULL };
 117     __DRIscreen *psp;
 118
 119     psp = calloc(1, sizeof(*psp));
 120     if (!psp)
 121         return NULL;
 122
 123     /* By default, use the global driDriverAPI symbol (non-megadrivers). */
 124     psp->driver = globalDriverAPI;
 125
 126     /* If the driver exposes its vtable through its extensions list
 127      * (megadrivers), use that instead.
 128      */
 129     if (driver_extensions) {
 130        for (int i = 0; driver_extensions[i]; i++) {
 131           if (strcmp(driver_extensions[i]->name, __DRI_DRIVER_VTABLE) == 0) {
 132              psp->driver =
 133                 ((__DRIDriverVtableExtension *)driver_extensions[i])->vtable;
 134           }
 135        }
 136     }
 137
 138     setupLoaderExtensions(psp, extensions);
 139
 140 #ifdef HAVE_LIBDRM
 141     if (fd != -1) {
 142        drmVersionPtr version = drmGetVersion(fd);
 143        if (version) {
 144           psp->drm_version.major = version->version_major;
 145           psp->drm_version.minor = version->version_minor;
 146           psp->drm_version.patch = version->version_patchlevel;
 147           drmFreeVersion(version);
 148        }
 149     }
 150 #endif
 151
 152     psp->loaderPrivate = data;
 153
 154     psp->extensions = emptyExtensionList;
 155     psp->fd = fd;
 156     psp->myNum = scrn;
 157
 158     *driver_configs = psp->driver->InitScreen(psp);
 159     if (*driver_configs == NULL) {
 160         free(psp);
 161         return NULL;
 162     }
 163
 164     struct gl_constants consts = { 0 };
 165     gl_api api;
 166     unsigned version;
 167
 168     api = API_OPENGLES2;
 169     if (_mesa_override_gl_version_contextless(&consts, &api, &version))
 170        psp->max_gl_es2_version = version;
 171
 172     api = API_OPENGL_COMPAT;
 173     if (_mesa_override_gl_version_contextless(&consts, &api, &version)) {
 174        if (api == API_OPENGL_CORE) {
 175           psp->max_gl_core_version = version;
 176        } else {
 177           psp->max_gl_compat_version = version;
 178        }
 179     }
 180
 181     psp->api_mask = (1 << __DRI_API_OPENGL);
 182     if (psp->max_gl_core_version > 0)
 183        psp->api_mask |= (1 << __DRI_API_OPENGL_CORE);
 184     if (psp->max_gl_es1_version > 0)
 185        psp->api_mask |= (1 << __DRI_API_GLES);
 186     if (psp->max_gl_es2_version > 0)
 187        psp->api_mask |= (1 << __DRI_API_GLES2);
 188     if (psp->max_gl_es2_version >= 30)
 189        psp->api_mask |= (1 << __DRI_API_GLES3);
 190
 191     driParseOptionInfo(&psp->optionInfo, __dri2ConfigOptions);
 192     driParseConfigFiles(&psp->optionCache, &psp->optionInfo, psp->myNum, "dri2");
 193
 194
 195     return psp;
 196 }
 197
 198 static __DRIscreen *
 199 dri2CreateNewScreen(int scrn, int fd,
 200                     const __DRIextension **extensions,
 201                     const __DRIconfig ***driver_configs, void *data)
 202 {
 203    return driCreateNewScreen2(scrn, fd, extensions, NULL,
 204                                driver_configs, data);
 205 }
 206
 207 /** swrast driver createNewScreen entrypoint. */
 208 static __DRIscreen *
 209 driSWRastCreateNewScreen(int scrn, const __DRIextension **extensions,
 210                          const __DRIconfig ***driver_configs, void *data)
 211 {
 212    return driCreateNewScreen2(scrn, -1, extensions, NULL,
 213                                driver_configs, data);
 214 }
 215
 216 static __DRIscreen *
 217 driSWRastCreateNewScreen2(int scrn, const __DRIextension **extensions,
 218                           const __DRIextension **driver_extensions,
 219                           const __DRIconfig ***driver_configs, void *data)
 220 {
 221    return driCreateNewScreen2(scrn, -1, extensions, driver_extensions,
 222                                driver_configs, data);
 223 }
 224
 225 /**
 226  * Destroy the per-screen private information.
 227  *
 228  * \internal
 229  * This function calls __DriverAPIRec::DestroyScreen on \p screenPrivate, calls
 230  * drmClose(), and finally frees \p screenPrivate.
 231  */
 232 static void driDestroyScreen(__DRIscreen *psp)
 233 {
 234     if (psp) {
 235         /* No interaction with the X-server is possible at this point.  This
 236          * routine is called after XCloseDisplay, so there is no protocol
 237          * stream open to the X-server anymore.
 238          */
 239
 240         psp->driver->DestroyScreen(psp);
 241
 242         driDestroyOptionCache(&psp->optionCache);
 243         driDestroyOptionInfo(&psp->optionInfo);
 244
 245         free(psp);
 246     }
 247 }
 248
 249 static const __DRIextension **driGetExtensions(__DRIscreen *psp)
 250 {
 251     return psp->extensions;
 252 }
 253
 254 /*@}*/
 255
 256
 257 static bool
 258 validate_context_version(__DRIscreen *screen,
 259                          int mesa_api,
 260                          unsigned major_version,
 261                          unsigned minor_version,
 262                          unsigned *dri_ctx_error)
 263 {
 264    unsigned req_version = 10 * major_version + minor_version;
 265    unsigned max_version = 0;
 266
 267    switch (mesa_api) {
 268    case API_OPENGL_COMPAT:
 269       max_version = screen->max_gl_compat_version;
 270       break;
 271    case API_OPENGL_CORE:
 272       max_version = screen->max_gl_core_version;
 273       break;
 274    case API_OPENGLES:
 275       max_version = screen->max_gl_es1_version;
 276       break;
 277    case API_OPENGLES2:
 278       max_version = screen->max_gl_es2_version;
 279       break;
 280    default:
 281       max_version = 0;
 282       break;
 283    }
 284
 285    if (max_version == 0) {
 286       *dri_ctx_error = __DRI_CTX_ERROR_BAD_API;
 287       return false;
 288    } else if (req_version > max_version) {
 289       *dri_ctx_error = __DRI_CTX_ERROR_BAD_VERSION;
 290       return false;
 291    }
 292
 293    return true;
 294 }
 295
 296 /*****************************************************************/
 297 /** \name Context handling functions                             */
 298 /*****************************************************************/
 299 /*@{*/
 300
 301 static __DRIcontext *
 302 driCreateContextAttribs(__DRIscreen *screen, int api,
 303                         const __DRIconfig *config,
 304                         __DRIcontext *shared,
 305                         unsigned num_attribs,
 306                         const uint32_t *attribs,
 307                         unsigned *error,
 308                         void *data)
 309 {
 310     __DRIcontext *context;
 311     const struct gl_config *modes = (config != NULL) ? &config->modes : NULL;
 312     void *shareCtx = (shared != NULL) ? shared->driverPrivate : NULL;
 313     gl_api mesa_api;
 314     unsigned major_version = 1;
 315     unsigned minor_version = 0;
 316     uint32_t flags = 0;
 317     bool notify_reset = false;
 318
 319     assert((num_attribs == 0) || (attribs != NULL));
 320
 321     if (!(screen->api_mask & (1 << api))) {
 322         *error = __DRI_CTX_ERROR_BAD_API;
 323         return NULL;
 324     }
 325
 326     switch (api) {
 327     case __DRI_API_OPENGL:
 328         mesa_api = API_OPENGL_COMPAT;
 329         break;
 330     case __DRI_API_GLES:
 331         mesa_api = API_OPENGLES;
 332         break;
 333     case __DRI_API_GLES2:
 334     case __DRI_API_GLES3:
 335         mesa_api = API_OPENGLES2;
 336         break;
 337     case __DRI_API_OPENGL_CORE:
 338         mesa_api = API_OPENGL_CORE;
 339         break;
 340     default:
 341         *error = __DRI_CTX_ERROR_BAD_API;
 342         return NULL;
 343     }
 344
 345     for (unsigned i = 0; i < num_attribs; i++) {
 346         switch (attribs[i * 2]) {
 347         case __DRI_CTX_ATTRIB_MAJOR_VERSION:
 348             major_version = attribs[i * 2 + 1];
 349             break;
 350         case __DRI_CTX_ATTRIB_MINOR_VERSION:
 351             minor_version = attribs[i * 2 + 1];
 352             break;
 353         case __DRI_CTX_ATTRIB_FLAGS:
 354             flags = attribs[i * 2 + 1];
 355             break;
 356         case __DRI_CTX_ATTRIB_RESET_STRATEGY:
 357             notify_reset = (attribs[i * 2 + 1]
 358                             != __DRI_CTX_RESET_NO_NOTIFICATION);
 359             break;
 360         default:
 361             /* We can't create a context that satisfies the requirements of an
 362              * attribute that we don't understand.  Return failure.
 363              */
 364             assert(!"Should not get here.");
 365             *error = __DRI_CTX_ERROR_UNKNOWN_ATTRIBUTE;
 366             return NULL;
 367         }
 368     }
 369
 370     /* Mesa does not support the GL_ARB_compatibilty extension or the
 371      * compatibility profile.  This means that we treat a API_OPENGL_COMPAT 3.1 as
 372      * API_OPENGL_CORE and reject API_OPENGL_COMPAT 3.2+.
 373      */
 374     if (mesa_api == API_OPENGL_COMPAT && major_version == 3 && minor_version == 1)
 375        mesa_api = API_OPENGL_CORE;
 376
 377     if (mesa_api == API_OPENGL_COMPAT
 378         && ((major_version > 3)
 379             || (major_version == 3 && minor_version >= 2))) {
 380        *error = __DRI_CTX_ERROR_BAD_API;
 381        return NULL;
 382     }
 383
 384     /* The latest version of EGL_KHR_create_context spec says:
 385      *
 386      *     "If the EGL_CONTEXT_OPENGL_DEBUG_BIT_KHR flag bit is set in
 387      *     EGL_CONTEXT_FLAGS_KHR, then a <debug context> will be created.
 388      *     [...] This bit is supported for OpenGL and OpenGL ES contexts.
 389      *
 390      * None of the other flags have any meaning in an ES context, so this seems safe.
 391      */
 392     if (mesa_api != API_OPENGL_COMPAT
 393         && mesa_api != API_OPENGL_CORE
 394         && (flags & ~__DRI_CTX_FLAG_DEBUG)) {
 395         *error = __DRI_CTX_ERROR_BAD_FLAG;
 396         return NULL;
 397     }
 398
 399     /* There are no forward-compatible contexts before OpenGL 3.0.  The
 400      * GLX_ARB_create_context spec says:
 401      *
 402      *     "Forward-compatible contexts are defined only for OpenGL versions
 403      *     3.0 and later."
 404      *
 405      * Forward-looking contexts are supported by silently converting the
 406      * requested API to API_OPENGL_CORE.
 407      *
 408      * In Mesa, a debug context is the same as a regular context.
 409      */
 410     if ((flags & __DRI_CTX_FLAG_FORWARD_COMPATIBLE) != 0) {
 411        mesa_api = API_OPENGL_CORE;
 412     }
 413
 414     const uint32_t allowed_flags = (__DRI_CTX_FLAG_DEBUG
 415                                     | __DRI_CTX_FLAG_FORWARD_COMPATIBLE
 416                                     | __DRI_CTX_FLAG_ROBUST_BUFFER_ACCESS);
 417     if (flags & ~allowed_flags) {
 418         *error = __DRI_CTX_ERROR_UNKNOWN_FLAG;
 419         return NULL;
 420     }
 421
 422     if (!validate_context_version(screen, mesa_api,
 423                                   major_version, minor_version, error))
 424        return NULL;
 425
 426     context = calloc(1, sizeof *context);
 427     if (!context) {
 428         *error = __DRI_CTX_ERROR_NO_MEMORY;
 429         return NULL;
 430     }
 431
 432     context->loaderPrivate = data;
 433
 434     context->driScreenPriv = screen;
 435     context->driDrawablePriv = NULL;
 436     context->driReadablePriv = NULL;
 437
 438     if (!screen->driver->CreateContext(mesa_api, modes, context,
 439                                        major_version, minor_version,
 440                                        flags, notify_reset, error, shareCtx)) {
 441         free(context);
 442         return NULL;
 443     }
 444
 445     *error = __DRI_CTX_ERROR_SUCCESS;
 446     return context;
 447 }
 448
 449 void
 450 driContextSetFlags(struct gl_context *ctx, uint32_t flags)
 451 {
 452     if ((flags & __DRI_CTX_FLAG_FORWARD_COMPATIBLE) != 0)
 453         ctx->Const.ContextFlags |= GL_CONTEXT_FLAG_FORWARD_COMPATIBLE_BIT;
 454     if ((flags & __DRI_CTX_FLAG_DEBUG) != 0) {
 455        _mesa_set_debug_state_int(ctx, GL_DEBUG_OUTPUT, GL_TRUE);
 456         ctx->Const.ContextFlags |= GL_CONTEXT_FLAG_DEBUG_BIT;
 457     }
 458 }
 459
 460 static __DRIcontext *
 461 driCreateNewContextForAPI(__DRIscreen *screen, int api,
 462                           const __DRIconfig *config,
 463                           __DRIcontext *shared, void *data)
 464 {
 465     unsigned error;
 466
 467     return driCreateContextAttribs(screen, api, config, shared, 0, NULL,
 468                                    &error, data);
 469 }
 470
 471 static __DRIcontext *
 472 driCreateNewContext(__DRIscreen *screen, const __DRIconfig *config,
 473                     __DRIcontext *shared, void *data)
 474 {
 475     return driCreateNewContextForAPI(screen, __DRI_API_OPENGL,
 476                                      config, shared, data);
 477 }
 478
 479 /**
 480  * Destroy the per-context private information.
 481  *
 482  * \internal
 483  * This function calls __DriverAPIRec::DestroyContext on \p contextPrivate, calls
 484  * drmDestroyContext(), and finally frees \p contextPrivate.
 485  */
 486 static void
 487 driDestroyContext(__DRIcontext *pcp)
 488 {
 489     if (pcp) {
 490         pcp->driScreenPriv->driver->DestroyContext(pcp);
 491         free(pcp);
 492     }
 493 }
 494
 495 static int
 496 driCopyContext(__DRIcontext *dest, __DRIcontext *src, unsigned long mask)
 497 {
 498     (void) dest;
 499     (void) src;
 500     (void) mask;
 501     return GL_FALSE;
 502 }
 503
 504 /*@}*/
 505
 506
 507 /*****************************************************************/
 508 /** \name Context (un)binding functions                          */
 509 /*****************************************************************/
 510 /*@{*/
 511
 512 static void dri_get_drawable(__DRIdrawable *pdp);
 513 static void dri_put_drawable(__DRIdrawable *pdp);
 514
 515 /**
 516  * This function takes both a read buffer and a draw buffer.  This is needed
 517  * for \c glXMakeCurrentReadSGI or GLX 1.3's \c glXMakeContextCurrent
 518  * function.
 519  */
 520 static int driBindContext(__DRIcontext *pcp,
 521                           __DRIdrawable *pdp,
 522                           __DRIdrawable *prp)
 523 {
 524     /*
 525     ** Assume error checking is done properly in glXMakeCurrent before
 526     ** calling driUnbindContext.
 527     */
 528
 529     if (!pcp)
 530         return GL_FALSE;
 531
 532     /* Bind the drawable to the context */
 533     pcp->driDrawablePriv = pdp;
 534     pcp->driReadablePriv = prp;
 535     if (pdp) {
 536         pdp->driContextPriv = pcp;
 537         dri_get_drawable(pdp);
 538     }
 539     if (prp && pdp != prp) {
 540         dri_get_drawable(prp);
 541     }
 542
 543     return pcp->driScreenPriv->driver->MakeCurrent(pcp, pdp, prp);
 544 }
 545
 546 /**
 547  * Unbind context.
 548  *
 549  * \param scrn the screen.
 550  * \param gc context.
 551  *
 552  * \return \c GL_TRUE on success, or \c GL_FALSE on failure.
 553  *
 554  * \internal
 555  * This function calls __DriverAPIRec::UnbindContext, and then decrements
 556  * __DRIdrawableRec::refcount which must be non-zero for a successful
 557  * return.
 558  *
 559  * While casting the opaque private pointers associated with the parameters
 560  * into their respective real types it also assures they are not \c NULL.
 561  */
 562 static int driUnbindContext(__DRIcontext *pcp)
 563 {
 564     __DRIdrawable *pdp;
 565     __DRIdrawable *prp;
 566
 567     /*
 568     ** Assume error checking is done properly in glXMakeCurrent before
 569     ** calling driUnbindContext.
 570     */
 571
 572     if (pcp == NULL)
 573         return GL_FALSE;
 574
 575     /*
 576     ** Call driUnbindContext before checking for valid drawables
 577     ** to handle surfaceless contexts properly.
 578     */
 579     pcp->driScreenPriv->driver->UnbindContext(pcp);
 580
 581     pdp = pcp->driDrawablePriv;
 582     prp = pcp->driReadablePriv;
 583
 584     /* already unbound */
 585     if (!pdp && !prp)
 586         return GL_TRUE;
 587
 588     assert(pdp);
 589     if (pdp->refcount == 0) {
 590         /* ERROR!!! */
 591         return GL_FALSE;
 592     }
 593
 594     dri_put_drawable(pdp);
 595
 596     if (prp != pdp) {
 597         if (prp->refcount == 0) {
 598             /* ERROR!!! */
 599             return GL_FALSE;
 600         }
 601
 602         dri_put_drawable(prp);
 603     }
 604
 605     pcp->driDrawablePriv = NULL;
 606     pcp->driReadablePriv = NULL;
 607
 608     return GL_TRUE;
 609 }
 610
 611 /*@}*/
 612
 613
 614 static void dri_get_drawable(__DRIdrawable *pdp)
 615 {
 616     pdp->refcount++;
 617 }
 618
 619 static void dri_put_drawable(__DRIdrawable *pdp)
 620 {
 621     if (pdp) {
 622         pdp->refcount--;
 623         if (pdp->refcount)
 624             return;
 625
 626         pdp->driScreenPriv->driver->DestroyBuffer(pdp);
 627         free(pdp);
 628     }
 629 }
 630
 631 static __DRIdrawable *
 632 driCreateNewDrawable(__DRIscreen *screen,
 633                      const __DRIconfig *config,
 634                      void *data)
 635 {
 636     __DRIdrawable *pdraw;
 637
 638     pdraw = malloc(sizeof *pdraw);
 639     if (!pdraw)
 640         return NULL;
 641
 642     pdraw->loaderPrivate = data;
 643
 644     pdraw->driScreenPriv = screen;
 645     pdraw->driContextPriv = NULL;
 646     pdraw->refcount = 0;
 647     pdraw->lastStamp = 0;
 648     pdraw->w = 0;
 649     pdraw->h = 0;
 650
 651     dri_get_drawable(pdraw);
 652
 653     if (!screen->driver->CreateBuffer(screen, pdraw, &config->modes,
 654                                       GL_FALSE)) {
 655        free(pdraw);
 656        return NULL;
 657     }
 658
 659     pdraw->dri2.stamp = pdraw->lastStamp + 1;
 660
 661     return pdraw;
 662 }
 663
 664 static void
 665 driDestroyDrawable(__DRIdrawable *pdp)
 666 {
 667     dri_put_drawable(pdp);
 668 }
 669
 670 static __DRIbuffer *
 671 dri2AllocateBuffer(__DRIscreen *screen,
 672                    unsigned int attachment, unsigned int format,
 673                    int width, int height)
 674 {
 675     return screen->driver->AllocateBuffer(screen, attachment, format,
 676                                           width, height);
 677 }
 678
 679 static void
 680 dri2ReleaseBuffer(__DRIscreen *screen, __DRIbuffer *buffer)
 681 {
 682     screen->driver->ReleaseBuffer(screen, buffer);
 683 }
 684
 685
 686 static int
 687 dri2ConfigQueryb(__DRIscreen *screen, const char *var, unsigned char *val)
 688 {
 689    if (!driCheckOption(&screen->optionCache, var, DRI_BOOL))
 690       return -1;
 691
 692    *val = driQueryOptionb(&screen->optionCache, var);
 693
 694    return 0;
 695 }
 696
 697 static int
 698 dri2ConfigQueryi(__DRIscreen *screen, const char *var, int *val)
 699 {
 700    if (!driCheckOption(&screen->optionCache, var, DRI_INT) &&
 701        !driCheckOption(&screen->optionCache, var, DRI_ENUM))
 702       return -1;
 703
 704     *val = driQueryOptioni(&screen->optionCache, var);
 705
 706     return 0;
 707 }
 708
 709 static int
 710 dri2ConfigQueryf(__DRIscreen *screen, const char *var, float *val)
 711 {
 712    if (!driCheckOption(&screen->optionCache, var, DRI_FLOAT))
 713       return -1;
 714
 715     *val = driQueryOptionf(&screen->optionCache, var);
 716
 717     return 0;
 718 }
 719
 720 static unsigned int
 721 driGetAPIMask(__DRIscreen *screen)
 722 {
 723     return screen->api_mask;
 724 }
 725
 726 /**
 727  * swrast swapbuffers entrypoint.
 728  *
 729  * DRI2 implements this inside the loader with only flushes handled by the
 730  * driver.
 731  */
 732 static void
 733 driSwapBuffers(__DRIdrawable *pdp)
 734 {
 735     assert(pdp->driScreenPriv->swrast_loader);
 736
 737     pdp->driScreenPriv->driver->SwapBuffers(pdp);
 738 }
 739
 740 /** Core interface */
 741 const __DRIcoreExtension driCoreExtension = {
 742     .base = { __DRI_CORE, 1 },
 743
 744     .createNewScreen            = NULL,
 745     .destroyScreen              = driDestroyScreen,
 746     .getExtensions              = driGetExtensions,
 747     .getConfigAttrib            = driGetConfigAttrib,
 748     .indexConfigAttrib          = driIndexConfigAttrib,
 749     .createNewDrawable          = NULL,
 750     .destroyDrawable            = driDestroyDrawable,
 751     .swapBuffers                = driSwapBuffers, /* swrast */
 752     .createNewContext           = driCreateNewContext, /* swrast */
 753     .copyContext                = driCopyContext,
 754     .destroyContext             = driDestroyContext,
 755     .bindContext                = driBindContext,
 756     .unbindContext              = driUnbindContext
 757 };
 758
 759 /** DRI2 interface */
 760 const __DRIdri2Extension driDRI2Extension = {
 761     .base = { __DRI_DRI2, 4 },
 762
 763     .createNewScreen            = dri2CreateNewScreen,
 764     .createNewDrawable          = driCreateNewDrawable,
 765     .createNewContext           = driCreateNewContext,
 766     .getAPIMask                 = driGetAPIMask,
 767     .createNewContextForAPI     = driCreateNewContextForAPI,
 768     .allocateBuffer             = dri2AllocateBuffer,
 769     .releaseBuffer              = dri2ReleaseBuffer,
 770     .createContextAttribs       = driCreateContextAttribs,
 771     .createNewScreen2           = driCreateNewScreen2,
 772 };
 773
 774 const __DRIswrastExtension driSWRastExtension = {
 775     .base = { __DRI_SWRAST, 4 },
 776
 777     .createNewScreen            = driSWRastCreateNewScreen,
 778     .createNewDrawable          = driCreateNewDrawable,
 779     .createNewContextForAPI     = driCreateNewContextForAPI,
 780     .createContextAttribs       = driCreateContextAttribs,
 781     .createNewScreen2           = driSWRastCreateNewScreen2,
 782 };
 783
 784 const __DRI2configQueryExtension dri2ConfigQueryExtension = {
 785    .base = { __DRI2_CONFIG_QUERY, 1 },
 786
 787    .configQueryb        = dri2ConfigQueryb,
 788    .configQueryi        = dri2ConfigQueryi,
 789    .configQueryf        = dri2ConfigQueryf,
 790 };
 791
 792 void
 793 dri2InvalidateDrawable(__DRIdrawable *drawable)
 794 {
 795     drawable->dri2.stamp++;
 796 }
 797
 798 /**
 799  * Check that the gl_framebuffer associated with dPriv is the right size.
 800  * Resize the gl_framebuffer if needed.
 801  * It's expected that the dPriv->driverPrivate member points to a
 802  * gl_framebuffer object.
 803  */
 804 void
 805 driUpdateFramebufferSize(struct gl_context *ctx, const __DRIdrawable *dPriv)
 806 {
 807    struct gl_framebuffer *fb = (struct gl_framebuffer *) dPriv->driverPrivate;
 808    if (fb && (dPriv->w != fb->Width || dPriv->h != fb->Height)) {
 809       ctx->Driver.ResizeBuffers(ctx, fb, dPriv->w, dPriv->h);
 810       /* if the driver needs the hw lock for ResizeBuffers, the drawable
 811          might have changed again by now */
 812       assert(fb->Width == dPriv->w);
 813       assert(fb->Height == dPriv->h);
 814    }
 815 }
 816
 817 uint32_t
 818 driGLFormatToImageFormat(mesa_format format)
 819 {
 820    switch (format) {
 821    case MESA_FORMAT_B5G6R5_UNORM:
 822       return __DRI_IMAGE_FORMAT_RGB565;
 823    case MESA_FORMAT_B8G8R8X8_UNORM:
 824       return __DRI_IMAGE_FORMAT_XRGB8888;
 825    case MESA_FORMAT_B10G10R10A2_UNORM:
 826       return __DRI_IMAGE_FORMAT_ARGB2101010;
 827    case MESA_FORMAT_B10G10R10X2_UNORM:
 828       return __DRI_IMAGE_FORMAT_XRGB2101010;
 829    case MESA_FORMAT_B8G8R8A8_UNORM:
 830       return __DRI_IMAGE_FORMAT_ARGB8888;
 831    case MESA_FORMAT_R8G8B8A8_UNORM:
 832       return __DRI_IMAGE_FORMAT_ABGR8888;
 833    case MESA_FORMAT_R8G8B8X8_UNORM:
 834       return __DRI_IMAGE_FORMAT_XBGR8888;
 835    case MESA_FORMAT_R_UNORM8:
 836       return __DRI_IMAGE_FORMAT_R8;
 837    case MESA_FORMAT_R8G8_UNORM:
 838       return __DRI_IMAGE_FORMAT_GR88;
 839    case MESA_FORMAT_NONE:
 840       return __DRI_IMAGE_FORMAT_NONE;
 841    case MESA_FORMAT_B8G8R8A8_SRGB:
 842       return __DRI_IMAGE_FORMAT_SARGB8;
 843    default:
 844       return 0;
 845    }
 846 }
 847
 848 mesa_format
 849 driImageFormatToGLFormat(uint32_t image_format)
 850 {
 851    switch (image_format) {
 852    case __DRI_IMAGE_FORMAT_RGB565:
 853       return MESA_FORMAT_B5G6R5_UNORM;
 854    case __DRI_IMAGE_FORMAT_XRGB8888:
 855       return MESA_FORMAT_B8G8R8X8_UNORM;
 856    case __DRI_IMAGE_FORMAT_ARGB2101010:
 857       return MESA_FORMAT_B10G10R10A2_UNORM;
 858    case __DRI_IMAGE_FORMAT_XRGB2101010:
 859       return MESA_FORMAT_B10G10R10X2_UNORM;
 860    case __DRI_IMAGE_FORMAT_ARGB8888:
 861       return MESA_FORMAT_B8G8R8A8_UNORM;
 862    case __DRI_IMAGE_FORMAT_ABGR8888:
 863       return MESA_FORMAT_R8G8B8A8_UNORM;
 864    case __DRI_IMAGE_FORMAT_XBGR8888:
 865       return MESA_FORMAT_R8G8B8X8_UNORM;
 866    case __DRI_IMAGE_FORMAT_R8:
 867       return MESA_FORMAT_R_UNORM8;
 868    case __DRI_IMAGE_FORMAT_GR88:
 869       return MESA_FORMAT_R8G8_UNORM;
 870    case __DRI_IMAGE_FORMAT_SARGB8:
 871       return MESA_FORMAT_B8G8R8A8_SRGB;
 872    case __DRI_IMAGE_FORMAT_NONE:
 873       return MESA_FORMAT_NONE;
 874    default:
 875       return MESA_FORMAT_NONE;
 876    }
 877 }
 878
 879 /** Image driver interface */
 880 const __DRIimageDriverExtension driImageDriverExtension = {
 881     .base = { __DRI_IMAGE_DRIVER, 1 },
 882
 883     .createNewScreen2           = driCreateNewScreen2,
 884     .createNewDrawable          = driCreateNewDrawable,
 885     .getAPIMask                 = driGetAPIMask,
 886     .createContextAttribs       = driCreateContextAttribs,
 887 };
 888
 889 /* swrast copy sub buffer entrypoint. */
 890 static void driCopySubBuffer(__DRIdrawable *pdp, int x, int y,
 891                              int w, int h)
 892 {
 893     assert(pdp->driScreenPriv->swrast_loader);
 894
 895     pdp->driScreenPriv->driver->CopySubBuffer(pdp, x, y, w, h);
 896 }
 897
 898 /* for swrast only */
 899 const __DRIcopySubBufferExtension driCopySubBufferExtension = {
 900    .base = { __DRI_COPY_SUB_BUFFER, 1 },
 901
 902    .copySubBuffer               = driCopySubBuffer,
 903 };