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/errors.h"
  53 #include "main/macros.h"
  54
  55 const char __dri2ConfigOptions[] =
  56    DRI_CONF_BEGIN
  57       DRI_CONF_SECTION_PERFORMANCE
  58          DRI_CONF_VBLANK_MODE(DRI_CONF_VBLANK_DEF_INTERVAL_1)
  59       DRI_CONF_SECTION_END
  60    DRI_CONF_END;
  61
  62 /*****************************************************************/
  63 /** \name Screen handling functions                              */
  64 /*****************************************************************/
  65 /*@{*/
  66
  67 static void
  68 setupLoaderExtensions(__DRIscreen *psp,
  69                       const __DRIextension **extensions)
  70 {
  71     int i;
  72
  73     for (i = 0; extensions[i]; i++) {
  74         if (strcmp(extensions[i]->name, __DRI_DRI2_LOADER) == 0)
  75             psp->dri2.loader = (__DRIdri2LoaderExtension *) extensions[i];
  76         if (strcmp(extensions[i]->name, __DRI_IMAGE_LOOKUP) == 0)
  77             psp->dri2.image = (__DRIimageLookupExtension *) extensions[i];
  78         if (strcmp(extensions[i]->name, __DRI_USE_INVALIDATE) == 0)
  79             psp->dri2.useInvalidate = (__DRIuseInvalidateExtension *) extensions[i];
  80         if (strcmp(extensions[i]->name, __DRI_SWRAST_LOADER) == 0)
  81             psp->swrast_loader = (__DRIswrastLoaderExtension *) extensions[i];
  82         if (strcmp(extensions[i]->name, __DRI_IMAGE_LOADER) == 0)
  83            psp->image.loader = (__DRIimageLoaderExtension *) extensions[i];
  84     }
  85 }
  86
  87 /**
  88  * This pointer determines which driver API we'll use in the case of the
  89  * loader not passing us an explicit driver extensions list (that would,
  90  * itself, contain a pointer to a driver API.)
  91  *
  92  * A driver's driDriverGetExtensions_drivername() can update this pointer to
  93  * what it's returning, and a loader that is ignorant of createNewScreen2()
  94  * will get the correct driver screen created, as long as no other
  95  * driDriverGetExtensions() happened in between the first one and the
  96  * createNewScreen().
  97  *
  98  * This allows the X Server to not require the significant dri_interface.h
  99  * updates for doing createNewScreen2(), which would discourage backporting of
 100  * the X Server patches to support the new loader interface.
 101  */
 102 const struct __DriverAPIRec *globalDriverAPI = &driDriverAPI;
 103
 104 /**
 105  * This is the first entrypoint in the driver called by the DRI driver loader
 106  * after dlopen()ing it.
 107  *
 108  * It's used to create global state for the driver across contexts on the same
 109  * Display.
 110  */
 111 static __DRIscreen *
 112 driCreateNewScreen2(int scrn, int fd,
 113                     const __DRIextension **extensions,
 114                     const __DRIextension **driver_extensions,
 115                     const __DRIconfig ***driver_configs, void *data)
 116 {
 117     static const __DRIextension *emptyExtensionList[] = { NULL };
 118     __DRIscreen *psp;
 119
 120     psp = calloc(1, sizeof(*psp));
 121     if (!psp)
 122         return NULL;
 123
 124     /* By default, use the global driDriverAPI symbol (non-megadrivers). */
 125     psp->driver = globalDriverAPI;
 126
 127     /* If the driver exposes its vtable through its extensions list
 128      * (megadrivers), use that instead.
 129      */
 130     if (driver_extensions) {
 131        for (int i = 0; driver_extensions[i]; i++) {
 132           if (strcmp(driver_extensions[i]->name, __DRI_DRIVER_VTABLE) == 0) {
 133              psp->driver =
 134                 ((__DRIDriverVtableExtension *)driver_extensions[i])->vtable;
 135           }
 136        }
 137     }
 138
 139     setupLoaderExtensions(psp, extensions);
 140
 141 #ifndef __NOT_HAVE_DRM_H
 142     if (fd != -1) {
 143        drmVersionPtr version = drmGetVersion(fd);
 144        if (version) {
 145           psp->drm_version.major = version->version_major;
 146           psp->drm_version.minor = version->version_minor;
 147           psp->drm_version.patch = version->version_patchlevel;
 148           drmFreeVersion(version);
 149        }
 150     }
 151 #endif
 152
 153     psp->loaderPrivate = data;
 154
 155     psp->extensions = emptyExtensionList;
 156     psp->fd = fd;
 157     psp->myNum = scrn;
 158
 159     *driver_configs = psp->driver->InitScreen(psp);
 160     if (*driver_configs == NULL) {
 161         free(psp);
 162         return NULL;
 163     }
 164
 165     struct gl_constants consts = { 0 };
 166     gl_api api;
 167     int version;
 168
 169     api = API_OPENGL_COMPAT;
 170     if (_mesa_override_gl_version_contextless(&consts, &api, &version)) {
 171        if (api == API_OPENGL_CORE) {
 172           psp->max_gl_core_version = version;
 173        } else {
 174           psp->max_gl_compat_version = version;
 175        }
 176     }
 177
 178     psp->api_mask = (1 << __DRI_API_OPENGL);
 179     if (psp->max_gl_core_version > 0)
 180        psp->api_mask |= (1 << __DRI_API_OPENGL_CORE);
 181     if (psp->max_gl_es1_version > 0)
 182        psp->api_mask |= (1 << __DRI_API_GLES);
 183     if (psp->max_gl_es2_version > 0)
 184        psp->api_mask |= (1 << __DRI_API_GLES2);
 185     if (psp->max_gl_es2_version >= 30)
 186        psp->api_mask |= (1 << __DRI_API_GLES3);
 187
 188     driParseOptionInfo(&psp->optionInfo, __dri2ConfigOptions);
 189     driParseConfigFiles(&psp->optionCache, &psp->optionInfo, psp->myNum, "dri2");
 190
 191
 192     return psp;
 193 }
 194
 195 static __DRIscreen *
 196 dri2CreateNewScreen(int scrn, int fd,
 197                     const __DRIextension **extensions,
 198                     const __DRIconfig ***driver_configs, void *data)
 199 {
 200    return driCreateNewScreen2(scrn, fd, extensions, NULL,
 201                                driver_configs, data);
 202 }
 203
 204 /** swrast driver createNewScreen entrypoint. */
 205 static __DRIscreen *
 206 driSWRastCreateNewScreen(int scrn, const __DRIextension **extensions,
 207                          const __DRIconfig ***driver_configs, void *data)
 208 {
 209    return driCreateNewScreen2(scrn, -1, extensions, NULL,
 210                                driver_configs, data);
 211 }
 212
 213 static __DRIscreen *
 214 driSWRastCreateNewScreen2(int scrn, const __DRIextension **extensions,
 215                           const __DRIextension **driver_extensions,
 216                           const __DRIconfig ***driver_configs, void *data)
 217 {
 218    return driCreateNewScreen2(scrn, -1, extensions, driver_extensions,
 219                                driver_configs, data);
 220 }
 221
 222 /**
 223  * Destroy the per-screen private information.
 224  *
 225  * \internal
 226  * This function calls __DriverAPIRec::DestroyScreen on \p screenPrivate, calls
 227  * drmClose(), and finally frees \p screenPrivate.
 228  */
 229 static void driDestroyScreen(__DRIscreen *psp)
 230 {
 231     if (psp) {
 232         /* No interaction with the X-server is possible at this point.  This
 233          * routine is called after XCloseDisplay, so there is no protocol
 234          * stream open to the X-server anymore.
 235          */
 236
 237        _mesa_destroy_shader_compiler();
 238
 239         psp->driver->DestroyScreen(psp);
 240
 241         driDestroyOptionCache(&psp->optionCache);
 242         driDestroyOptionInfo(&psp->optionInfo);
 243
 244         free(psp);
 245     }
 246 }
 247
 248 static const __DRIextension **driGetExtensions(__DRIscreen *psp)
 249 {
 250     return psp->extensions;
 251 }
 252
 253 /*@}*/
 254
 255
 256 static bool
 257 validate_context_version(__DRIscreen *screen,
 258                          int mesa_api,
 259                          unsigned major_version,
 260                          unsigned minor_version,
 261                          unsigned *dri_ctx_error)
 262 {
 263    unsigned req_version = 10 * major_version + minor_version;
 264    unsigned max_version = 0;
 265
 266    switch (mesa_api) {
 267    case API_OPENGL_COMPAT:
 268       max_version = screen->max_gl_compat_version;
 269       break;
 270    case API_OPENGL_CORE:
 271       max_version = screen->max_gl_core_version;
 272       break;
 273    case API_OPENGLES:
 274       max_version = screen->max_gl_es1_version;
 275       break;
 276    case API_OPENGLES2:
 277       max_version = screen->max_gl_es2_version;
 278       break;
 279    default:
 280       max_version = 0;
 281       break;
 282    }
 283
 284    if (max_version == 0) {
 285       *dri_ctx_error = __DRI_CTX_ERROR_BAD_API;
 286       return false;
 287    } else if (req_version > max_version) {
 288       *dri_ctx_error = __DRI_CTX_ERROR_BAD_VERSION;
 289       return false;
 290    }
 291
 292    return true;
 293 }
 294
 295 /*****************************************************************/
 296 /** \name Context handling functions                             */
 297 /*****************************************************************/
 298 /*@{*/
 299
 300 static __DRIcontext *
 301 driCreateContextAttribs(__DRIscreen *screen, int api,
 302                         const __DRIconfig *config,
 303                         __DRIcontext *shared,
 304                         unsigned num_attribs,
 305                         const uint32_t *attribs,
 306                         unsigned *error,
 307                         void *data)
 308 {
 309     __DRIcontext *context;
 310     const struct gl_config *modes = (config != NULL) ? &config->modes : NULL;
 311     void *shareCtx = (shared != NULL) ? shared->driverPrivate : NULL;
 312     gl_api mesa_api;
 313     unsigned major_version = 1;
 314     unsigned minor_version = 0;
 315     uint32_t flags = 0;
 316     bool notify_reset = false;
 317
 318     assert((num_attribs == 0) || (attribs != NULL));
 319
 320     if (!(screen->api_mask & (1 << api))) {
 321         *error = __DRI_CTX_ERROR_BAD_API;
 322         return NULL;
 323     }
 324
 325     switch (api) {
 326     case __DRI_API_OPENGL:
 327         mesa_api = API_OPENGL_COMPAT;
 328         break;
 329     case __DRI_API_GLES:
 330         mesa_api = API_OPENGLES;
 331         break;
 332     case __DRI_API_GLES2:
 333     case __DRI_API_GLES3:
 334         mesa_api = API_OPENGLES2;
 335         break;
 336     case __DRI_API_OPENGL_CORE:
 337         mesa_api = API_OPENGL_CORE;
 338         break;
 339     default:
 340         *error = __DRI_CTX_ERROR_BAD_API;
 341         return NULL;
 342     }
 343
 344     for (unsigned i = 0; i < num_attribs; i++) {
 345         switch (attribs[i * 2]) {
 346         case __DRI_CTX_ATTRIB_MAJOR_VERSION:
 347             major_version = attribs[i * 2 + 1];
 348             break;
 349         case __DRI_CTX_ATTRIB_MINOR_VERSION:
 350             minor_version = attribs[i * 2 + 1];
 351             break;
 352         case __DRI_CTX_ATTRIB_FLAGS:
 353             flags = attribs[i * 2 + 1];
 354             break;
 355         case __DRI_CTX_ATTRIB_RESET_STRATEGY:
 356             notify_reset = (attribs[i * 2 + 1]
 357                             != __DRI_CTX_RESET_NO_NOTIFICATION);
 358             break;
 359         default:
 360             /* We can't create a context that satisfies the requirements of an
 361              * attribute that we don't understand.  Return failure.
 362              */
 363             assert(!"Should not get here.");
 364             *error = __DRI_CTX_ERROR_UNKNOWN_ATTRIBUTE;
 365             return NULL;
 366         }
 367     }
 368
 369     /* Mesa does not support the GL_ARB_compatibilty extension or the
 370      * compatibility profile.  This means that we treat a API_OPENGL_COMPAT 3.1 as
 371      * API_OPENGL_CORE and reject API_OPENGL_COMPAT 3.2+.
 372      */
 373     if (mesa_api == API_OPENGL_COMPAT && major_version == 3 && minor_version == 1)
 374        mesa_api = API_OPENGL_CORE;
 375
 376     if (mesa_api == API_OPENGL_COMPAT
 377         && ((major_version > 3)
 378             || (major_version == 3 && minor_version >= 2))) {
 379        *error = __DRI_CTX_ERROR_BAD_API;
 380        return NULL;
 381     }
 382
 383     /* The latest version of EGL_KHR_create_context spec says:
 384      *
 385      *     "If the EGL_CONTEXT_OPENGL_DEBUG_BIT_KHR flag bit is set in
 386      *     EGL_CONTEXT_FLAGS_KHR, then a <debug context> will be created.
 387      *     [...] This bit is supported for OpenGL and OpenGL ES contexts.
 388      *
 389      * None of the other flags have any meaning in an ES context, so this seems safe.
 390      */
 391     if (mesa_api != API_OPENGL_COMPAT
 392         && mesa_api != API_OPENGL_CORE
 393         && (flags & ~__DRI_CTX_FLAG_DEBUG)) {
 394         *error = __DRI_CTX_ERROR_BAD_FLAG;
 395         return NULL;
 396     }
 397
 398     /* There are no forward-compatible contexts before OpenGL 3.0.  The
 399      * GLX_ARB_create_context spec says:
 400      *
 401      *     "Forward-compatible contexts are defined only for OpenGL versions
 402      *     3.0 and later."
 403      *
 404      * Forward-looking contexts are supported by silently converting the
 405      * requested API to API_OPENGL_CORE.
 406      *
 407      * In Mesa, a debug context is the same as a regular context.
 408      */
 409     if ((flags & __DRI_CTX_FLAG_FORWARD_COMPATIBLE) != 0) {
 410        mesa_api = API_OPENGL_CORE;
 411     }
 412
 413     const uint32_t allowed_flags = (__DRI_CTX_FLAG_DEBUG
 414                                     | __DRI_CTX_FLAG_FORWARD_COMPATIBLE
 415                                     | __DRI_CTX_FLAG_ROBUST_BUFFER_ACCESS);
 416     if (flags & ~allowed_flags) {
 417         *error = __DRI_CTX_ERROR_UNKNOWN_FLAG;
 418         return NULL;
 419     }
 420
 421     if (!validate_context_version(screen, mesa_api,
 422                                   major_version, minor_version, error))
 423        return NULL;
 424
 425     context = calloc(1, sizeof *context);
 426     if (!context) {
 427         *error = __DRI_CTX_ERROR_NO_MEMORY;
 428         return NULL;
 429     }
 430
 431     context->loaderPrivate = data;
 432
 433     context->driScreenPriv = screen;
 434     context->driDrawablePriv = NULL;
 435     context->driReadablePriv = NULL;
 436
 437     if (!screen->driver->CreateContext(mesa_api, modes, context,
 438                                        major_version, minor_version,
 439                                        flags, notify_reset, error, shareCtx)) {
 440         free(context);
 441         return NULL;
 442     }
 443
 444     *error = __DRI_CTX_ERROR_SUCCESS;
 445     return context;
 446 }
 447
 448 void
 449 driContextSetFlags(struct gl_context *ctx, uint32_t flags)
 450 {
 451     if ((flags & __DRI_CTX_FLAG_FORWARD_COMPATIBLE) != 0)
 452         ctx->Const.ContextFlags |= GL_CONTEXT_FLAG_FORWARD_COMPATIBLE_BIT;
 453     if ((flags & __DRI_CTX_FLAG_DEBUG) != 0) {
 454        _mesa_set_debug_state_int(ctx, GL_DEBUG_OUTPUT, GL_TRUE);
 455         ctx->Const.ContextFlags |= GL_CONTEXT_FLAG_DEBUG_BIT;
 456     }
 457 }
 458
 459 static __DRIcontext *
 460 driCreateNewContextForAPI(__DRIscreen *screen, int api,
 461                           const __DRIconfig *config,
 462                           __DRIcontext *shared, void *data)
 463 {
 464     unsigned error;
 465
 466     return driCreateContextAttribs(screen, api, config, shared, 0, NULL,
 467                                    &error, data);
 468 }
 469
 470 static __DRIcontext *
 471 driCreateNewContext(__DRIscreen *screen, const __DRIconfig *config,
 472                     __DRIcontext *shared, void *data)
 473 {
 474     return driCreateNewContextForAPI(screen, __DRI_API_OPENGL,
 475                                      config, shared, data);
 476 }
 477
 478 /**
 479  * Destroy the per-context private information.
 480  *
 481  * \internal
 482  * This function calls __DriverAPIRec::DestroyContext on \p contextPrivate, calls
 483  * drmDestroyContext(), and finally frees \p contextPrivate.
 484  */
 485 static void
 486 driDestroyContext(__DRIcontext *pcp)
 487 {
 488     if (pcp) {
 489         pcp->driScreenPriv->driver->DestroyContext(pcp);
 490         free(pcp);
 491     }
 492 }
 493
 494 static int
 495 driCopyContext(__DRIcontext *dest, __DRIcontext *src, unsigned long mask)
 496 {
 497     (void) dest;
 498     (void) src;
 499     (void) mask;
 500     return GL_FALSE;
 501 }
 502
 503 /*@}*/
 504
 505
 506 /*****************************************************************/
 507 /** \name Context (un)binding functions                          */
 508 /*****************************************************************/
 509 /*@{*/
 510
 511 static void dri_get_drawable(__DRIdrawable *pdp);
 512 static void dri_put_drawable(__DRIdrawable *pdp);
 513
 514 /**
 515  * This function takes both a read buffer and a draw buffer.  This is needed
 516  * for \c glXMakeCurrentReadSGI or GLX 1.3's \c glXMakeContextCurrent
 517  * function.
 518  */
 519 static int driBindContext(__DRIcontext *pcp,
 520                           __DRIdrawable *pdp,
 521                           __DRIdrawable *prp)
 522 {
 523     /*
 524     ** Assume error checking is done properly in glXMakeCurrent before
 525     ** calling driUnbindContext.
 526     */
 527
 528     if (!pcp)
 529         return GL_FALSE;
 530
 531     /* Bind the drawable to the context */
 532     pcp->driDrawablePriv = pdp;
 533     pcp->driReadablePriv = prp;
 534     if (pdp) {
 535         pdp->driContextPriv = pcp;
 536         dri_get_drawable(pdp);
 537     }
 538     if (prp && pdp != prp) {
 539         dri_get_drawable(prp);
 540     }
 541
 542     return pcp->driScreenPriv->driver->MakeCurrent(pcp, pdp, prp);
 543 }
 544
 545 /**
 546  * Unbind context.
 547  *
 548  * \param scrn the screen.
 549  * \param gc context.
 550  *
 551  * \return \c GL_TRUE on success, or \c GL_FALSE on failure.
 552  *
 553  * \internal
 554  * This function calls __DriverAPIRec::UnbindContext, and then decrements
 555  * __DRIdrawableRec::refcount which must be non-zero for a successful
 556  * return.
 557  *
 558  * While casting the opaque private pointers associated with the parameters
 559  * into their respective real types it also assures they are not \c NULL.
 560  */
 561 static int driUnbindContext(__DRIcontext *pcp)
 562 {
 563     __DRIdrawable *pdp;
 564     __DRIdrawable *prp;
 565
 566     /*
 567     ** Assume error checking is done properly in glXMakeCurrent before
 568     ** calling driUnbindContext.
 569     */
 570
 571     if (pcp == NULL)
 572         return GL_FALSE;
 573
 574     /*
 575     ** Call driUnbindContext before checking for valid drawables
 576     ** to handle surfaceless contexts properly.
 577     */
 578     pcp->driScreenPriv->driver->UnbindContext(pcp);
 579
 580     pdp = pcp->driDrawablePriv;
 581     prp = pcp->driReadablePriv;
 582
 583     /* already unbound */
 584     if (!pdp && !prp)
 585         return GL_TRUE;
 586
 587     assert(pdp);
 588     if (pdp->refcount == 0) {
 589         /* ERROR!!! */
 590         return GL_FALSE;
 591     }
 592
 593     dri_put_drawable(pdp);
 594
 595     if (prp != pdp) {
 596         if (prp->refcount == 0) {
 597             /* ERROR!!! */
 598             return GL_FALSE;
 599         }
 600
 601         dri_put_drawable(prp);
 602     }
 603
 604     pcp->driDrawablePriv = NULL;
 605     pcp->driReadablePriv = NULL;
 606
 607     return GL_TRUE;
 608 }
 609
 610 /*@}*/
 611
 612
 613 static void dri_get_drawable(__DRIdrawable *pdp)
 614 {
 615     pdp->refcount++;
 616 }
 617
 618 static void dri_put_drawable(__DRIdrawable *pdp)
 619 {
 620     if (pdp) {
 621         pdp->refcount--;
 622         if (pdp->refcount)
 623             return;
 624
 625         pdp->driScreenPriv->driver->DestroyBuffer(pdp);
 626         free(pdp);
 627     }
 628 }
 629
 630 static __DRIdrawable *
 631 driCreateNewDrawable(__DRIscreen *screen,
 632                      const __DRIconfig *config,
 633                      void *data)
 634 {
 635     __DRIdrawable *pdraw;
 636
 637     pdraw = malloc(sizeof *pdraw);
 638     if (!pdraw)
 639         return NULL;
 640
 641     pdraw->loaderPrivate = data;
 642
 643     pdraw->driScreenPriv = screen;
 644     pdraw->driContextPriv = NULL;
 645     pdraw->refcount = 0;
 646     pdraw->lastStamp = 0;
 647     pdraw->w = 0;
 648     pdraw->h = 0;
 649
 650     dri_get_drawable(pdraw);
 651
 652     if (!screen->driver->CreateBuffer(screen, pdraw, &config->modes,
 653                                       GL_FALSE)) {
 654        free(pdraw);
 655        return NULL;
 656     }
 657
 658     pdraw->dri2.stamp = pdraw->lastStamp + 1;
 659
 660     return pdraw;
 661 }
 662
 663 static void
 664 driDestroyDrawable(__DRIdrawable *pdp)
 665 {
 666     dri_put_drawable(pdp);
 667 }
 668
 669 static __DRIbuffer *
 670 dri2AllocateBuffer(__DRIscreen *screen,
 671                    unsigned int attachment, unsigned int format,
 672                    int width, int height)
 673 {
 674     return screen->driver->AllocateBuffer(screen, attachment, format,
 675                                           width, height);
 676 }
 677
 678 static void
 679 dri2ReleaseBuffer(__DRIscreen *screen, __DRIbuffer *buffer)
 680 {
 681     screen->driver->ReleaseBuffer(screen, buffer);
 682 }
 683
 684
 685 static int
 686 dri2ConfigQueryb(__DRIscreen *screen, const char *var, unsigned char *val)
 687 {
 688    if (!driCheckOption(&screen->optionCache, var, DRI_BOOL))
 689       return -1;
 690
 691    *val = driQueryOptionb(&screen->optionCache, var);
 692
 693    return 0;
 694 }
 695
 696 static int
 697 dri2ConfigQueryi(__DRIscreen *screen, const char *var, int *val)
 698 {
 699    if (!driCheckOption(&screen->optionCache, var, DRI_INT) &&
 700        !driCheckOption(&screen->optionCache, var, DRI_ENUM))
 701       return -1;
 702
 703     *val = driQueryOptioni(&screen->optionCache, var);
 704
 705     return 0;
 706 }
 707
 708 static int
 709 dri2ConfigQueryf(__DRIscreen *screen, const char *var, float *val)
 710 {
 711    if (!driCheckOption(&screen->optionCache, var, DRI_FLOAT))
 712       return -1;
 713
 714     *val = driQueryOptionf(&screen->optionCache, var);
 715
 716     return 0;
 717 }
 718
 719 static unsigned int
 720 driGetAPIMask(__DRIscreen *screen)
 721 {
 722     return screen->api_mask;
 723 }
 724
 725 /**
 726  * swrast swapbuffers entrypoint.
 727  *
 728  * DRI2 implements this inside the loader with only flushes handled by the
 729  * driver.
 730  */
 731 static void
 732 driSwapBuffers(__DRIdrawable *pdp)
 733 {
 734     assert(pdp->driScreenPriv->swrast_loader);
 735
 736     pdp->driScreenPriv->driver->SwapBuffers(pdp);
 737 }
 738
 739 /** Core interface */
 740 const __DRIcoreExtension driCoreExtension = {
 741     .base = { __DRI_CORE, 1 },
 742
 743     .createNewScreen            = NULL,
 744     .destroyScreen              = driDestroyScreen,
 745     .getExtensions              = driGetExtensions,
 746     .getConfigAttrib            = driGetConfigAttrib,
 747     .indexConfigAttrib          = driIndexConfigAttrib,
 748     .createNewDrawable          = NULL,
 749     .destroyDrawable            = driDestroyDrawable,
 750     .swapBuffers                = driSwapBuffers, /* swrast */
 751     .createNewContext           = driCreateNewContext, /* swrast */
 752     .copyContext                = driCopyContext,
 753     .destroyContext             = driDestroyContext,
 754     .bindContext                = driBindContext,
 755     .unbindContext              = driUnbindContext
 756 };
 757
 758 /** DRI2 interface */
 759 const __DRIdri2Extension driDRI2Extension = {
 760     .base = { __DRI_DRI2, 4 },
 761
 762     .createNewScreen            = dri2CreateNewScreen,
 763     .createNewDrawable          = driCreateNewDrawable,
 764     .createNewContext           = driCreateNewContext,
 765     .getAPIMask                 = driGetAPIMask,
 766     .createNewContextForAPI     = driCreateNewContextForAPI,
 767     .allocateBuffer             = dri2AllocateBuffer,
 768     .releaseBuffer              = dri2ReleaseBuffer,
 769     .createContextAttribs       = driCreateContextAttribs,
 770     .createNewScreen2           = driCreateNewScreen2,
 771 };
 772
 773 const __DRIswrastExtension driSWRastExtension = {
 774     .base = { __DRI_SWRAST, 4 },
 775
 776     .createNewScreen            = driSWRastCreateNewScreen,
 777     .createNewDrawable          = driCreateNewDrawable,
 778     .createNewContextForAPI     = driCreateNewContextForAPI,
 779     .createContextAttribs       = driCreateContextAttribs,
 780     .createNewScreen2           = driSWRastCreateNewScreen2,
 781 };
 782
 783 const __DRI2configQueryExtension dri2ConfigQueryExtension = {
 784    .base = { __DRI2_CONFIG_QUERY, 1 },
 785
 786    .configQueryb        = dri2ConfigQueryb,
 787    .configQueryi        = dri2ConfigQueryi,
 788    .configQueryf        = dri2ConfigQueryf,
 789 };
 790
 791 void
 792 dri2InvalidateDrawable(__DRIdrawable *drawable)
 793 {
 794     drawable->dri2.stamp++;
 795 }
 796
 797 /**
 798  * Check that the gl_framebuffer associated with dPriv is the right size.
 799  * Resize the gl_framebuffer if needed.
 800  * It's expected that the dPriv->driverPrivate member points to a
 801  * gl_framebuffer object.
 802  */
 803 void
 804 driUpdateFramebufferSize(struct gl_context *ctx, const __DRIdrawable *dPriv)
 805 {
 806    struct gl_framebuffer *fb = (struct gl_framebuffer *) dPriv->driverPrivate;
 807    if (fb && (dPriv->w != fb->Width || dPriv->h != fb->Height)) {
 808       ctx->Driver.ResizeBuffers(ctx, fb, dPriv->w, dPriv->h);
 809       /* if the driver needs the hw lock for ResizeBuffers, the drawable
 810          might have changed again by now */
 811       assert(fb->Width == dPriv->w);
 812       assert(fb->Height == dPriv->h);
 813    }
 814 }
 815
 816 uint32_t
 817 driGLFormatToImageFormat(mesa_format format)
 818 {
 819    switch (format) {
 820    case MESA_FORMAT_B5G6R5_UNORM:
 821       return __DRI_IMAGE_FORMAT_RGB565;
 822    case MESA_FORMAT_B8G8R8X8_UNORM:
 823       return __DRI_IMAGE_FORMAT_XRGB8888;
 824    case MESA_FORMAT_B10G10R10A2_UNORM:
 825       return __DRI_IMAGE_FORMAT_ARGB2101010;
 826    case MESA_FORMAT_B10G10R10X2_UNORM:
 827       return __DRI_IMAGE_FORMAT_XRGB2101010;
 828    case MESA_FORMAT_B8G8R8A8_UNORM:
 829       return __DRI_IMAGE_FORMAT_ARGB8888;
 830    case MESA_FORMAT_R8G8B8A8_UNORM:
 831       return __DRI_IMAGE_FORMAT_ABGR8888;
 832    case MESA_FORMAT_R8G8B8X8_UNORM:
 833       return __DRI_IMAGE_FORMAT_XBGR8888;
 834    case MESA_FORMAT_R_UNORM8:
 835       return __DRI_IMAGE_FORMAT_R8;
 836    case MESA_FORMAT_R8G8_UNORM:
 837       return __DRI_IMAGE_FORMAT_GR88;
 838    case MESA_FORMAT_NONE:
 839       return __DRI_IMAGE_FORMAT_NONE;
 840    case MESA_FORMAT_B8G8R8A8_SRGB:
 841       return __DRI_IMAGE_FORMAT_SARGB8;
 842    default:
 843       return 0;
 844    }
 845 }
 846
 847 mesa_format
 848 driImageFormatToGLFormat(uint32_t image_format)
 849 {
 850    switch (image_format) {
 851    case __DRI_IMAGE_FORMAT_RGB565:
 852       return MESA_FORMAT_B5G6R5_UNORM;
 853    case __DRI_IMAGE_FORMAT_XRGB8888:
 854       return MESA_FORMAT_B8G8R8X8_UNORM;
 855    case __DRI_IMAGE_FORMAT_ARGB2101010:
 856       return MESA_FORMAT_B10G10R10A2_UNORM;
 857    case __DRI_IMAGE_FORMAT_XRGB2101010:
 858       return MESA_FORMAT_B10G10R10X2_UNORM;
 859    case __DRI_IMAGE_FORMAT_ARGB8888:
 860       return MESA_FORMAT_B8G8R8A8_UNORM;
 861    case __DRI_IMAGE_FORMAT_ABGR8888:
 862       return MESA_FORMAT_R8G8B8A8_UNORM;
 863    case __DRI_IMAGE_FORMAT_XBGR8888:
 864       return MESA_FORMAT_R8G8B8X8_UNORM;
 865    case __DRI_IMAGE_FORMAT_R8:
 866       return MESA_FORMAT_R_UNORM8;
 867    case __DRI_IMAGE_FORMAT_GR88:
 868       return MESA_FORMAT_R8G8_UNORM;
 869    case __DRI_IMAGE_FORMAT_SARGB8:
 870       return MESA_FORMAT_B8G8R8A8_SRGB;
 871    case __DRI_IMAGE_FORMAT_NONE:
 872       return MESA_FORMAT_NONE;
 873    default:
 874       return MESA_FORMAT_NONE;
 875    }
 876 }
 877
 878 /** Image driver interface */
 879 const __DRIimageDriverExtension driImageDriverExtension = {
 880     .base = { __DRI_IMAGE_DRIVER, 1 },
 881
 882     .createNewScreen2           = driCreateNewScreen2,
 883     .createNewDrawable          = driCreateNewDrawable,
 884     .getAPIMask                 = driGetAPIMask,
 885     .createContextAttribs       = driCreateContextAttribs,
 886 };
 887
 888 /* swrast copy sub buffer entrypoint. */
 889 static void driCopySubBuffer(__DRIdrawable *pdp, int x, int y,
 890                              int w, int h)
 891 {
 892     assert(pdp->driScreenPriv->swrast_loader);
 893
 894     pdp->driScreenPriv->driver->CopySubBuffer(pdp, x, y, w, h);
 895 }
 896
 897 /* for swrast only */
 898 const __DRIcopySubBufferExtension driCopySubBufferExtension = {
 899    .base = { __DRI_COPY_SUB_BUFFER, 1 },
 900
 901    .copySubBuffer               = driCopySubBuffer,
 902 };