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 #include "dri_util.h"
  44 #include "utils.h"
  45 #include "xmlpool.h"
  46 #include "main/mtypes.h"
  47 #include "main/version.h"
  48 #include "main/errors.h"
  49 #include "main/macros.h"
  50
  51 const char __dri2ConfigOptions[] =
  52    DRI_CONF_BEGIN
  53       DRI_CONF_SECTION_PERFORMANCE
  54          DRI_CONF_VBLANK_MODE(DRI_CONF_VBLANK_DEF_INTERVAL_1)
  55       DRI_CONF_SECTION_END
  56    DRI_CONF_END;
  57
  58 /*****************************************************************/
  59 /** \name Screen handling functions                              */
  60 /*****************************************************************/
  61 /*@{*/
  62
  63 static void
  64 setupLoaderExtensions(__DRIscreen *psp,
  65                       const __DRIextension **extensions)
  66 {
  67     int i;
  68
  69     for (i = 0; extensions[i]; i++) {
  70         if (strcmp(extensions[i]->name, __DRI_DRI2_LOADER) == 0)
  71             psp->dri2.loader = (__DRIdri2LoaderExtension *) extensions[i];
  72         if (strcmp(extensions[i]->name, __DRI_IMAGE_LOOKUP) == 0)
  73             psp->dri2.image = (__DRIimageLookupExtension *) extensions[i];
  74         if (strcmp(extensions[i]->name, __DRI_USE_INVALIDATE) == 0)
  75             psp->dri2.useInvalidate = (__DRIuseInvalidateExtension *) extensions[i];
  76         if (strcmp(extensions[i]->name, __DRI_SWRAST_LOADER) == 0)
  77             psp->swrast_loader = (__DRIswrastLoaderExtension *) extensions[i];
  78         if (strcmp(extensions[i]->name, __DRI_IMAGE_LOADER) == 0)
  79            psp->image.loader = (__DRIimageLoaderExtension *) extensions[i];
  80     }
  81 }
  82
  83 /**
  84  * This pointer determines which driver API we'll use in the case of the
  85  * loader not passing us an explicit driver extensions list (that would,
  86  * itself, contain a pointer to a driver API.)
  87  *
  88  * A driver's driDriverGetExtensions_drivername() can update this pointer to
  89  * what it's returning, and a loader that is ignorant of createNewScreen2()
  90  * will get the correct driver screen created, as long as no other
  91  * driDriverGetExtensions() happened in between the first one and the
  92  * createNewScreen().
  93  *
  94  * This allows the X Server to not require the significant dri_interface.h
  95  * updates for doing createNewScreen2(), which would discourage backporting of
  96  * the X Server patches to support the new loader interface.
  97  */
  98 const struct __DriverAPIRec *globalDriverAPI = &driDriverAPI;
  99
 100 /**
 101  * This is the first entrypoint in the driver called by the DRI driver loader
 102  * after dlopen()ing it.
 103  *
 104  * It's used to create global state for the driver across contexts on the same
 105  * Display.
 106  */
 107 static __DRIscreen *
 108 driCreateNewScreen2(int scrn, int fd,
 109                     const __DRIextension **extensions,
 110                     const __DRIextension **driver_extensions,
 111                     const __DRIconfig ***driver_configs, void *data)
 112 {
 113     static const __DRIextension *emptyExtensionList[] = { NULL };
 114     __DRIscreen *psp;
 115
 116     psp = calloc(1, sizeof(*psp));
 117     if (!psp)
 118         return NULL;
 119
 120     /* By default, use the global driDriverAPI symbol (non-megadrivers). */
 121     psp->driver = globalDriverAPI;
 122
 123     /* If the driver exposes its vtable through its extensions list
 124      * (megadrivers), use that instead.
 125      */
 126     if (driver_extensions) {
 127        for (int i = 0; driver_extensions[i]; i++) {
 128           if (strcmp(driver_extensions[i]->name, __DRI_DRIVER_VTABLE) == 0) {
 129              psp->driver =
 130                 ((__DRIDriverVtableExtension *)driver_extensions[i])->vtable;
 131           }
 132        }
 133     }
 134
 135     setupLoaderExtensions(psp, extensions);
 136
 137     psp->loaderPrivate = data;
 138
 139     psp->extensions = emptyExtensionList;
 140     psp->fd = fd;
 141     psp->myNum = scrn;
 142
 143     *driver_configs = psp->driver->InitScreen(psp);
 144     if (*driver_configs == NULL) {
 145         free(psp);
 146         return NULL;
 147     }
 148
 149     struct gl_constants consts = { 0 };
 150     gl_api api;
 151     unsigned version;
 152
 153     api = API_OPENGLES2;
 154     if (_mesa_override_gl_version_contextless(&consts, &api, &version))
 155        psp->max_gl_es2_version = version;
 156
 157     api = API_OPENGL_COMPAT;
 158     if (_mesa_override_gl_version_contextless(&consts, &api, &version)) {
 159        if (api == API_OPENGL_CORE) {
 160           psp->max_gl_core_version = version;
 161        } else {
 162           psp->max_gl_compat_version = version;
 163        }
 164     }
 165
 166     psp->api_mask = (1 << __DRI_API_OPENGL);
 167     if (psp->max_gl_core_version > 0)
 168        psp->api_mask |= (1 << __DRI_API_OPENGL_CORE);
 169     if (psp->max_gl_es1_version > 0)
 170        psp->api_mask |= (1 << __DRI_API_GLES);
 171     if (psp->max_gl_es2_version > 0)
 172        psp->api_mask |= (1 << __DRI_API_GLES2);
 173     if (psp->max_gl_es2_version >= 30)
 174        psp->api_mask |= (1 << __DRI_API_GLES3);
 175
 176     driParseOptionInfo(&psp->optionInfo, __dri2ConfigOptions);
 177     driParseConfigFiles(&psp->optionCache, &psp->optionInfo, psp->myNum, "dri2");
 178
 179
 180     return psp;
 181 }
 182
 183 static __DRIscreen *
 184 dri2CreateNewScreen(int scrn, int fd,
 185                     const __DRIextension **extensions,
 186                     const __DRIconfig ***driver_configs, void *data)
 187 {
 188    return driCreateNewScreen2(scrn, fd, extensions, NULL,
 189                                driver_configs, data);
 190 }
 191
 192 /** swrast driver createNewScreen entrypoint. */
 193 static __DRIscreen *
 194 driSWRastCreateNewScreen(int scrn, const __DRIextension **extensions,
 195                          const __DRIconfig ***driver_configs, void *data)
 196 {
 197    return driCreateNewScreen2(scrn, -1, extensions, NULL,
 198                                driver_configs, data);
 199 }
 200
 201 static __DRIscreen *
 202 driSWRastCreateNewScreen2(int scrn, const __DRIextension **extensions,
 203                           const __DRIextension **driver_extensions,
 204                           const __DRIconfig ***driver_configs, void *data)
 205 {
 206    return driCreateNewScreen2(scrn, -1, extensions, driver_extensions,
 207                                driver_configs, data);
 208 }
 209
 210 /**
 211  * Destroy the per-screen private information.
 212  *
 213  * \internal
 214  * This function calls __DriverAPIRec::DestroyScreen on \p screenPrivate, calls
 215  * drmClose(), and finally frees \p screenPrivate.
 216  */
 217 static void driDestroyScreen(__DRIscreen *psp)
 218 {
 219     if (psp) {
 220         /* No interaction with the X-server is possible at this point.  This
 221          * routine is called after XCloseDisplay, so there is no protocol
 222          * stream open to the X-server anymore.
 223          */
 224
 225         psp->driver->DestroyScreen(psp);
 226
 227         driDestroyOptionCache(&psp->optionCache);
 228         driDestroyOptionInfo(&psp->optionInfo);
 229
 230         free(psp);
 231     }
 232 }
 233
 234 static const __DRIextension **driGetExtensions(__DRIscreen *psp)
 235 {
 236     return psp->extensions;
 237 }
 238
 239 /*@}*/
 240
 241
 242 static bool
 243 validate_context_version(__DRIscreen *screen,
 244                          int mesa_api,
 245                          unsigned major_version,
 246                          unsigned minor_version,
 247                          unsigned *dri_ctx_error)
 248 {
 249    unsigned req_version = 10 * major_version + minor_version;
 250    unsigned max_version = 0;
 251
 252    switch (mesa_api) {
 253    case API_OPENGL_COMPAT:
 254       max_version = screen->max_gl_compat_version;
 255       break;
 256    case API_OPENGL_CORE:
 257       max_version = screen->max_gl_core_version;
 258       break;
 259    case API_OPENGLES:
 260       max_version = screen->max_gl_es1_version;
 261       break;
 262    case API_OPENGLES2:
 263       max_version = screen->max_gl_es2_version;
 264       break;
 265    default:
 266       max_version = 0;
 267       break;
 268    }
 269
 270    if (max_version == 0) {
 271       *dri_ctx_error = __DRI_CTX_ERROR_BAD_API;
 272       return false;
 273    } else if (req_version > max_version) {
 274       *dri_ctx_error = __DRI_CTX_ERROR_BAD_VERSION;
 275       return false;
 276    }
 277
 278    return true;
 279 }
 280
 281 /*****************************************************************/
 282 /** \name Context handling functions                             */
 283 /*****************************************************************/
 284 /*@{*/
 285
 286 static __DRIcontext *
 287 driCreateContextAttribs(__DRIscreen *screen, int api,
 288                         const __DRIconfig *config,
 289                         __DRIcontext *shared,
 290                         unsigned num_attribs,
 291                         const uint32_t *attribs,
 292                         unsigned *error,
 293                         void *data)
 294 {
 295     __DRIcontext *context;
 296     const struct gl_config *modes = (config != NULL) ? &config->modes : NULL;
 297     void *shareCtx = (shared != NULL) ? shared->driverPrivate : NULL;
 298     gl_api mesa_api;
 299     unsigned major_version = 1;
 300     unsigned minor_version = 0;
 301     uint32_t flags = 0;
 302     bool notify_reset = false;
 303
 304     assert((num_attribs == 0) || (attribs != NULL));
 305
 306     if (!(screen->api_mask & (1 << api))) {
 307         *error = __DRI_CTX_ERROR_BAD_API;
 308         return NULL;
 309     }
 310
 311     switch (api) {
 312     case __DRI_API_OPENGL:
 313         mesa_api = API_OPENGL_COMPAT;
 314         break;
 315     case __DRI_API_GLES:
 316         mesa_api = API_OPENGLES;
 317         break;
 318     case __DRI_API_GLES2:
 319     case __DRI_API_GLES3:
 320         mesa_api = API_OPENGLES2;
 321         break;
 322     case __DRI_API_OPENGL_CORE:
 323         mesa_api = API_OPENGL_CORE;
 324         break;
 325     default:
 326         *error = __DRI_CTX_ERROR_BAD_API;
 327         return NULL;
 328     }
 329
 330     for (unsigned i = 0; i < num_attribs; i++) {
 331         switch (attribs[i * 2]) {
 332         case __DRI_CTX_ATTRIB_MAJOR_VERSION:
 333             major_version = attribs[i * 2 + 1];
 334             break;
 335         case __DRI_CTX_ATTRIB_MINOR_VERSION:
 336             minor_version = attribs[i * 2 + 1];
 337             break;
 338         case __DRI_CTX_ATTRIB_FLAGS:
 339             flags = attribs[i * 2 + 1];
 340             break;
 341         case __DRI_CTX_ATTRIB_RESET_STRATEGY:
 342             notify_reset = (attribs[i * 2 + 1]
 343                             != __DRI_CTX_RESET_NO_NOTIFICATION);
 344             break;
 345         default:
 346             /* We can't create a context that satisfies the requirements of an
 347              * attribute that we don't understand.  Return failure.
 348              */
 349             assert(!"Should not get here.");
 350             *error = __DRI_CTX_ERROR_UNKNOWN_ATTRIBUTE;
 351             return NULL;
 352         }
 353     }
 354
 355     /* Mesa does not support the GL_ARB_compatibilty extension or the
 356      * compatibility profile.  This means that we treat a API_OPENGL_COMPAT 3.1 as
 357      * API_OPENGL_CORE and reject API_OPENGL_COMPAT 3.2+.
 358      */
 359     if (mesa_api == API_OPENGL_COMPAT && major_version == 3 && minor_version == 1)
 360        mesa_api = API_OPENGL_CORE;
 361
 362     if (mesa_api == API_OPENGL_COMPAT
 363         && ((major_version > 3)
 364             || (major_version == 3 && minor_version >= 2))) {
 365        *error = __DRI_CTX_ERROR_BAD_API;
 366        return NULL;
 367     }
 368
 369     /* The latest version of EGL_KHR_create_context spec says:
 370      *
 371      *     "If the EGL_CONTEXT_OPENGL_DEBUG_BIT_KHR flag bit is set in
 372      *     EGL_CONTEXT_FLAGS_KHR, then a <debug context> will be created.
 373      *     [...] This bit is supported for OpenGL and OpenGL ES contexts.
 374      *
 375      * None of the other flags have any meaning in an ES context, so this seems safe.
 376      */
 377     if (mesa_api != API_OPENGL_COMPAT
 378         && mesa_api != API_OPENGL_CORE
 379         && (flags & ~__DRI_CTX_FLAG_DEBUG)) {
 380         *error = __DRI_CTX_ERROR_BAD_FLAG;
 381         return NULL;
 382     }
 383
 384     /* There are no forward-compatible contexts before OpenGL 3.0.  The
 385      * GLX_ARB_create_context spec says:
 386      *
 387      *     "Forward-compatible contexts are defined only for OpenGL versions
 388      *     3.0 and later."
 389      *
 390      * Forward-looking contexts are supported by silently converting the
 391      * requested API to API_OPENGL_CORE.
 392      *
 393      * In Mesa, a debug context is the same as a regular context.
 394      */
 395     if ((flags & __DRI_CTX_FLAG_FORWARD_COMPATIBLE) != 0) {
 396        mesa_api = API_OPENGL_CORE;
 397     }
 398
 399     const uint32_t allowed_flags = (__DRI_CTX_FLAG_DEBUG
 400                                     | __DRI_CTX_FLAG_FORWARD_COMPATIBLE
 401                                     | __DRI_CTX_FLAG_ROBUST_BUFFER_ACCESS);
 402     if (flags & ~allowed_flags) {
 403         *error = __DRI_CTX_ERROR_UNKNOWN_FLAG;
 404         return NULL;
 405     }
 406
 407     if (!validate_context_version(screen, mesa_api,
 408                                   major_version, minor_version, error))
 409        return NULL;
 410
 411     context = calloc(1, sizeof *context);
 412     if (!context) {
 413         *error = __DRI_CTX_ERROR_NO_MEMORY;
 414         return NULL;
 415     }
 416
 417     context->loaderPrivate = data;
 418
 419     context->driScreenPriv = screen;
 420     context->driDrawablePriv = NULL;
 421     context->driReadablePriv = NULL;
 422
 423     if (!screen->driver->CreateContext(mesa_api, modes, context,
 424                                        major_version, minor_version,
 425                                        flags, notify_reset, error, shareCtx)) {
 426         free(context);
 427         return NULL;
 428     }
 429
 430     *error = __DRI_CTX_ERROR_SUCCESS;
 431     return context;
 432 }
 433
 434 void
 435 driContextSetFlags(struct gl_context *ctx, uint32_t flags)
 436 {
 437     if ((flags & __DRI_CTX_FLAG_FORWARD_COMPATIBLE) != 0)
 438         ctx->Const.ContextFlags |= GL_CONTEXT_FLAG_FORWARD_COMPATIBLE_BIT;
 439     if ((flags & __DRI_CTX_FLAG_DEBUG) != 0) {
 440        _mesa_set_debug_state_int(ctx, GL_DEBUG_OUTPUT, GL_TRUE);
 441         ctx->Const.ContextFlags |= GL_CONTEXT_FLAG_DEBUG_BIT;
 442     }
 443 }
 444
 445 static __DRIcontext *
 446 driCreateNewContextForAPI(__DRIscreen *screen, int api,
 447                           const __DRIconfig *config,
 448                           __DRIcontext *shared, void *data)
 449 {
 450     unsigned error;
 451
 452     return driCreateContextAttribs(screen, api, config, shared, 0, NULL,
 453                                    &error, data);
 454 }
 455
 456 static __DRIcontext *
 457 driCreateNewContext(__DRIscreen *screen, const __DRIconfig *config,
 458                     __DRIcontext *shared, void *data)
 459 {
 460     return driCreateNewContextForAPI(screen, __DRI_API_OPENGL,
 461                                      config, shared, data);
 462 }
 463
 464 /**
 465  * Destroy the per-context private information.
 466  *
 467  * \internal
 468  * This function calls __DriverAPIRec::DestroyContext on \p contextPrivate, calls
 469  * drmDestroyContext(), and finally frees \p contextPrivate.
 470  */
 471 static void
 472 driDestroyContext(__DRIcontext *pcp)
 473 {
 474     if (pcp) {
 475         pcp->driScreenPriv->driver->DestroyContext(pcp);
 476         free(pcp);
 477     }
 478 }
 479
 480 static int
 481 driCopyContext(__DRIcontext *dest, __DRIcontext *src, unsigned long mask)
 482 {
 483     (void) dest;
 484     (void) src;
 485     (void) mask;
 486     return GL_FALSE;
 487 }
 488
 489 /*@}*/
 490
 491
 492 /*****************************************************************/
 493 /** \name Context (un)binding functions                          */
 494 /*****************************************************************/
 495 /*@{*/
 496
 497 static void dri_get_drawable(__DRIdrawable *pdp);
 498 static void dri_put_drawable(__DRIdrawable *pdp);
 499
 500 /**
 501  * This function takes both a read buffer and a draw buffer.  This is needed
 502  * for \c glXMakeCurrentReadSGI or GLX 1.3's \c glXMakeContextCurrent
 503  * function.
 504  */
 505 static int driBindContext(__DRIcontext *pcp,
 506                           __DRIdrawable *pdp,
 507                           __DRIdrawable *prp)
 508 {
 509     /*
 510     ** Assume error checking is done properly in glXMakeCurrent before
 511     ** calling driUnbindContext.
 512     */
 513
 514     if (!pcp)
 515         return GL_FALSE;
 516
 517     /* Bind the drawable to the context */
 518     pcp->driDrawablePriv = pdp;
 519     pcp->driReadablePriv = prp;
 520     if (pdp) {
 521         pdp->driContextPriv = pcp;
 522         dri_get_drawable(pdp);
 523     }
 524     if (prp && pdp != prp) {
 525         dri_get_drawable(prp);
 526     }
 527
 528     return pcp->driScreenPriv->driver->MakeCurrent(pcp, pdp, prp);
 529 }
 530
 531 /**
 532  * Unbind context.
 533  *
 534  * \param scrn the screen.
 535  * \param gc context.
 536  *
 537  * \return \c GL_TRUE on success, or \c GL_FALSE on failure.
 538  *
 539  * \internal
 540  * This function calls __DriverAPIRec::UnbindContext, and then decrements
 541  * __DRIdrawableRec::refcount which must be non-zero for a successful
 542  * return.
 543  *
 544  * While casting the opaque private pointers associated with the parameters
 545  * into their respective real types it also assures they are not \c NULL.
 546  */
 547 static int driUnbindContext(__DRIcontext *pcp)
 548 {
 549     __DRIdrawable *pdp;
 550     __DRIdrawable *prp;
 551
 552     /*
 553     ** Assume error checking is done properly in glXMakeCurrent before
 554     ** calling driUnbindContext.
 555     */
 556
 557     if (pcp == NULL)
 558         return GL_FALSE;
 559
 560     /*
 561     ** Call driUnbindContext before checking for valid drawables
 562     ** to handle surfaceless contexts properly.
 563     */
 564     pcp->driScreenPriv->driver->UnbindContext(pcp);
 565
 566     pdp = pcp->driDrawablePriv;
 567     prp = pcp->driReadablePriv;
 568
 569     /* already unbound */
 570     if (!pdp && !prp)
 571         return GL_TRUE;
 572
 573     assert(pdp);
 574     if (pdp->refcount == 0) {
 575         /* ERROR!!! */
 576         return GL_FALSE;
 577     }
 578
 579     dri_put_drawable(pdp);
 580
 581     if (prp != pdp) {
 582         if (prp->refcount == 0) {
 583             /* ERROR!!! */
 584             return GL_FALSE;
 585         }
 586
 587         dri_put_drawable(prp);
 588     }
 589
 590     pcp->driDrawablePriv = NULL;
 591     pcp->driReadablePriv = NULL;
 592
 593     return GL_TRUE;
 594 }
 595
 596 /*@}*/
 597
 598
 599 static void dri_get_drawable(__DRIdrawable *pdp)
 600 {
 601     pdp->refcount++;
 602 }
 603
 604 static void dri_put_drawable(__DRIdrawable *pdp)
 605 {
 606     if (pdp) {
 607         pdp->refcount--;
 608         if (pdp->refcount)
 609             return;
 610
 611         pdp->driScreenPriv->driver->DestroyBuffer(pdp);
 612         free(pdp);
 613     }
 614 }
 615
 616 static __DRIdrawable *
 617 driCreateNewDrawable(__DRIscreen *screen,
 618                      const __DRIconfig *config,
 619                      void *data)
 620 {
 621     __DRIdrawable *pdraw;
 622
 623     pdraw = malloc(sizeof *pdraw);
 624     if (!pdraw)
 625         return NULL;
 626
 627     pdraw->loaderPrivate = data;
 628
 629     pdraw->driScreenPriv = screen;
 630     pdraw->driContextPriv = NULL;
 631     pdraw->refcount = 0;
 632     pdraw->lastStamp = 0;
 633     pdraw->w = 0;
 634     pdraw->h = 0;
 635
 636     dri_get_drawable(pdraw);
 637
 638     if (!screen->driver->CreateBuffer(screen, pdraw, &config->modes,
 639                                       GL_FALSE)) {
 640        free(pdraw);
 641        return NULL;
 642     }
 643
 644     pdraw->dri2.stamp = pdraw->lastStamp + 1;
 645
 646     return pdraw;
 647 }
 648
 649 static void
 650 driDestroyDrawable(__DRIdrawable *pdp)
 651 {
 652     dri_put_drawable(pdp);
 653 }
 654
 655 static __DRIbuffer *
 656 dri2AllocateBuffer(__DRIscreen *screen,
 657                    unsigned int attachment, unsigned int format,
 658                    int width, int height)
 659 {
 660     return screen->driver->AllocateBuffer(screen, attachment, format,
 661                                           width, height);
 662 }
 663
 664 static void
 665 dri2ReleaseBuffer(__DRIscreen *screen, __DRIbuffer *buffer)
 666 {
 667     screen->driver->ReleaseBuffer(screen, buffer);
 668 }
 669
 670
 671 static int
 672 dri2ConfigQueryb(__DRIscreen *screen, const char *var, unsigned char *val)
 673 {
 674    if (!driCheckOption(&screen->optionCache, var, DRI_BOOL))
 675       return -1;
 676
 677    *val = driQueryOptionb(&screen->optionCache, var);
 678
 679    return 0;
 680 }
 681
 682 static int
 683 dri2ConfigQueryi(__DRIscreen *screen, const char *var, int *val)
 684 {
 685    if (!driCheckOption(&screen->optionCache, var, DRI_INT) &&
 686        !driCheckOption(&screen->optionCache, var, DRI_ENUM))
 687       return -1;
 688
 689     *val = driQueryOptioni(&screen->optionCache, var);
 690
 691     return 0;
 692 }
 693
 694 static int
 695 dri2ConfigQueryf(__DRIscreen *screen, const char *var, float *val)
 696 {
 697    if (!driCheckOption(&screen->optionCache, var, DRI_FLOAT))
 698       return -1;
 699
 700     *val = driQueryOptionf(&screen->optionCache, var);
 701
 702     return 0;
 703 }
 704
 705 static unsigned int
 706 driGetAPIMask(__DRIscreen *screen)
 707 {
 708     return screen->api_mask;
 709 }
 710
 711 /**
 712  * swrast swapbuffers entrypoint.
 713  *
 714  * DRI2 implements this inside the loader with only flushes handled by the
 715  * driver.
 716  */
 717 static void
 718 driSwapBuffers(__DRIdrawable *pdp)
 719 {
 720     assert(pdp->driScreenPriv->swrast_loader);
 721
 722     pdp->driScreenPriv->driver->SwapBuffers(pdp);
 723 }
 724
 725 /** Core interface */
 726 const __DRIcoreExtension driCoreExtension = {
 727     .base = { __DRI_CORE, 1 },
 728
 729     .createNewScreen            = NULL,
 730     .destroyScreen              = driDestroyScreen,
 731     .getExtensions              = driGetExtensions,
 732     .getConfigAttrib            = driGetConfigAttrib,
 733     .indexConfigAttrib          = driIndexConfigAttrib,
 734     .createNewDrawable          = NULL,
 735     .destroyDrawable            = driDestroyDrawable,
 736     .swapBuffers                = driSwapBuffers, /* swrast */
 737     .createNewContext           = driCreateNewContext, /* swrast */
 738     .copyContext                = driCopyContext,
 739     .destroyContext             = driDestroyContext,
 740     .bindContext                = driBindContext,
 741     .unbindContext              = driUnbindContext
 742 };
 743
 744 /** DRI2 interface */
 745 const __DRIdri2Extension driDRI2Extension = {
 746     .base = { __DRI_DRI2, 4 },
 747
 748     .createNewScreen            = dri2CreateNewScreen,
 749     .createNewDrawable          = driCreateNewDrawable,
 750     .createNewContext           = driCreateNewContext,
 751     .getAPIMask                 = driGetAPIMask,
 752     .createNewContextForAPI     = driCreateNewContextForAPI,
 753     .allocateBuffer             = dri2AllocateBuffer,
 754     .releaseBuffer              = dri2ReleaseBuffer,
 755     .createContextAttribs       = driCreateContextAttribs,
 756     .createNewScreen2           = driCreateNewScreen2,
 757 };
 758
 759 const __DRIswrastExtension driSWRastExtension = {
 760     .base = { __DRI_SWRAST, 4 },
 761
 762     .createNewScreen            = driSWRastCreateNewScreen,
 763     .createNewDrawable          = driCreateNewDrawable,
 764     .createNewContextForAPI     = driCreateNewContextForAPI,
 765     .createContextAttribs       = driCreateContextAttribs,
 766     .createNewScreen2           = driSWRastCreateNewScreen2,
 767 };
 768
 769 const __DRI2configQueryExtension dri2ConfigQueryExtension = {
 770    .base = { __DRI2_CONFIG_QUERY, 1 },
 771
 772    .configQueryb        = dri2ConfigQueryb,
 773    .configQueryi        = dri2ConfigQueryi,
 774    .configQueryf        = dri2ConfigQueryf,
 775 };
 776
 777 void
 778 dri2InvalidateDrawable(__DRIdrawable *drawable)
 779 {
 780     drawable->dri2.stamp++;
 781 }
 782
 783 /**
 784  * Check that the gl_framebuffer associated with dPriv is the right size.
 785  * Resize the gl_framebuffer if needed.
 786  * It's expected that the dPriv->driverPrivate member points to a
 787  * gl_framebuffer object.
 788  */
 789 void
 790 driUpdateFramebufferSize(struct gl_context *ctx, const __DRIdrawable *dPriv)
 791 {
 792    struct gl_framebuffer *fb = (struct gl_framebuffer *) dPriv->driverPrivate;
 793    if (fb && (dPriv->w != fb->Width || dPriv->h != fb->Height)) {
 794       ctx->Driver.ResizeBuffers(ctx, fb, dPriv->w, dPriv->h);
 795       /* if the driver needs the hw lock for ResizeBuffers, the drawable
 796          might have changed again by now */
 797       assert(fb->Width == dPriv->w);
 798       assert(fb->Height == dPriv->h);
 799    }
 800 }
 801
 802 uint32_t
 803 driGLFormatToImageFormat(mesa_format format)
 804 {
 805    switch (format) {
 806    case MESA_FORMAT_B5G6R5_UNORM:
 807       return __DRI_IMAGE_FORMAT_RGB565;
 808    case MESA_FORMAT_B8G8R8X8_UNORM:
 809       return __DRI_IMAGE_FORMAT_XRGB8888;
 810    case MESA_FORMAT_B10G10R10A2_UNORM:
 811       return __DRI_IMAGE_FORMAT_ARGB2101010;
 812    case MESA_FORMAT_B10G10R10X2_UNORM:
 813       return __DRI_IMAGE_FORMAT_XRGB2101010;
 814    case MESA_FORMAT_B8G8R8A8_UNORM:
 815       return __DRI_IMAGE_FORMAT_ARGB8888;
 816    case MESA_FORMAT_R8G8B8A8_UNORM:
 817       return __DRI_IMAGE_FORMAT_ABGR8888;
 818    case MESA_FORMAT_R8G8B8X8_UNORM:
 819       return __DRI_IMAGE_FORMAT_XBGR8888;
 820    case MESA_FORMAT_R_UNORM8:
 821       return __DRI_IMAGE_FORMAT_R8;
 822    case MESA_FORMAT_R8G8_UNORM:
 823       return __DRI_IMAGE_FORMAT_GR88;
 824    case MESA_FORMAT_NONE:
 825       return __DRI_IMAGE_FORMAT_NONE;
 826    case MESA_FORMAT_B8G8R8A8_SRGB:
 827       return __DRI_IMAGE_FORMAT_SARGB8;
 828    default:
 829       return 0;
 830    }
 831 }
 832
 833 mesa_format
 834 driImageFormatToGLFormat(uint32_t image_format)
 835 {
 836    switch (image_format) {
 837    case __DRI_IMAGE_FORMAT_RGB565:
 838       return MESA_FORMAT_B5G6R5_UNORM;
 839    case __DRI_IMAGE_FORMAT_XRGB8888:
 840       return MESA_FORMAT_B8G8R8X8_UNORM;
 841    case __DRI_IMAGE_FORMAT_ARGB2101010:
 842       return MESA_FORMAT_B10G10R10A2_UNORM;
 843    case __DRI_IMAGE_FORMAT_XRGB2101010:
 844       return MESA_FORMAT_B10G10R10X2_UNORM;
 845    case __DRI_IMAGE_FORMAT_ARGB8888:
 846       return MESA_FORMAT_B8G8R8A8_UNORM;
 847    case __DRI_IMAGE_FORMAT_ABGR8888:
 848       return MESA_FORMAT_R8G8B8A8_UNORM;
 849    case __DRI_IMAGE_FORMAT_XBGR8888:
 850       return MESA_FORMAT_R8G8B8X8_UNORM;
 851    case __DRI_IMAGE_FORMAT_R8:
 852       return MESA_FORMAT_R_UNORM8;
 853    case __DRI_IMAGE_FORMAT_GR88:
 854       return MESA_FORMAT_R8G8_UNORM;
 855    case __DRI_IMAGE_FORMAT_SARGB8:
 856       return MESA_FORMAT_B8G8R8A8_SRGB;
 857    case __DRI_IMAGE_FORMAT_NONE:
 858       return MESA_FORMAT_NONE;
 859    default:
 860       return MESA_FORMAT_NONE;
 861    }
 862 }
 863
 864 /** Image driver interface */
 865 const __DRIimageDriverExtension driImageDriverExtension = {
 866     .base = { __DRI_IMAGE_DRIVER, 1 },
 867
 868     .createNewScreen2           = driCreateNewScreen2,
 869     .createNewDrawable          = driCreateNewDrawable,
 870     .getAPIMask                 = driGetAPIMask,
 871     .createContextAttribs       = driCreateContextAttribs,
 872 };
 873
 874 /* swrast copy sub buffer entrypoint. */
 875 static void driCopySubBuffer(__DRIdrawable *pdp, int x, int y,
 876                              int w, int h)
 877 {
 878     assert(pdp->driScreenPriv->swrast_loader);
 879
 880     pdp->driScreenPriv->driver->CopySubBuffer(pdp, x, y, w, h);
 881 }
 882
 883 /* for swrast only */
 884 const __DRIcopySubBufferExtension driCopySubBufferExtension = {
 885    .base = { __DRI_COPY_SUB_BUFFER, 1 },
 886
 887    .copySubBuffer               = driCopySubBuffer,
 888 };