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     unsigned version;
 168
 169     api = API_OPENGLES2;
 170     if (_mesa_override_gl_version_contextless(&consts, &api, &version))
 171        psp->max_gl_es2_version = version;
 172
 173     api = API_OPENGL_COMPAT;
 174     if (_mesa_override_gl_version_contextless(&consts, &api, &version)) {
 175        if (api == API_OPENGL_CORE) {
 176           psp->max_gl_core_version = version;
 177        } else {
 178           psp->max_gl_compat_version = version;
 179        }
 180     }
 181
 182     psp->api_mask = (1 << __DRI_API_OPENGL);
 183     if (psp->max_gl_core_version > 0)
 184        psp->api_mask |= (1 << __DRI_API_OPENGL_CORE);
 185     if (psp->max_gl_es1_version > 0)
 186        psp->api_mask |= (1 << __DRI_API_GLES);
 187     if (psp->max_gl_es2_version > 0)
 188        psp->api_mask |= (1 << __DRI_API_GLES2);
 189     if (psp->max_gl_es2_version >= 30)
 190        psp->api_mask |= (1 << __DRI_API_GLES3);
 191
 192     driParseOptionInfo(&psp->optionInfo, __dri2ConfigOptions);
 193     driParseConfigFiles(&psp->optionCache, &psp->optionInfo, psp->myNum, "dri2");
 194
 195
 196     return psp;
 197 }
 198
 199 static __DRIscreen *
 200 dri2CreateNewScreen(int scrn, int fd,
 201                     const __DRIextension **extensions,
 202                     const __DRIconfig ***driver_configs, void *data)
 203 {
 204    return driCreateNewScreen2(scrn, fd, extensions, NULL,
 205                                driver_configs, data);
 206 }
 207
 208 /** swrast driver createNewScreen entrypoint. */
 209 static __DRIscreen *
 210 driSWRastCreateNewScreen(int scrn, const __DRIextension **extensions,
 211                          const __DRIconfig ***driver_configs, void *data)
 212 {
 213    return driCreateNewScreen2(scrn, -1, extensions, NULL,
 214                                driver_configs, data);
 215 }
 216
 217 static __DRIscreen *
 218 driSWRastCreateNewScreen2(int scrn, const __DRIextension **extensions,
 219                           const __DRIextension **driver_extensions,
 220                           const __DRIconfig ***driver_configs, void *data)
 221 {
 222    return driCreateNewScreen2(scrn, -1, extensions, driver_extensions,
 223                                driver_configs, data);
 224 }
 225
 226 /**
 227  * Destroy the per-screen private information.
 228  *
 229  * \internal
 230  * This function calls __DriverAPIRec::DestroyScreen on \p screenPrivate, calls
 231  * drmClose(), and finally frees \p screenPrivate.
 232  */
 233 static void driDestroyScreen(__DRIscreen *psp)
 234 {
 235     if (psp) {
 236         /* No interaction with the X-server is possible at this point.  This
 237          * routine is called after XCloseDisplay, so there is no protocol
 238          * stream open to the X-server anymore.
 239          */
 240
 241        _mesa_destroy_shader_compiler();
 242
 243         psp->driver->DestroyScreen(psp);
 244
 245         driDestroyOptionCache(&psp->optionCache);
 246         driDestroyOptionInfo(&psp->optionInfo);
 247
 248         free(psp);
 249     }
 250 }
 251
 252 static const __DRIextension **driGetExtensions(__DRIscreen *psp)
 253 {
 254     return psp->extensions;
 255 }
 256
 257 /*@}*/
 258
 259
 260 static bool
 261 validate_context_version(__DRIscreen *screen,
 262                          int mesa_api,
 263                          unsigned major_version,
 264                          unsigned minor_version,
 265                          unsigned *dri_ctx_error)
 266 {
 267    unsigned req_version = 10 * major_version + minor_version;
 268    unsigned max_version = 0;
 269
 270    switch (mesa_api) {
 271    case API_OPENGL_COMPAT:
 272       max_version = screen->max_gl_compat_version;
 273       break;
 274    case API_OPENGL_CORE:
 275       max_version = screen->max_gl_core_version;
 276       break;
 277    case API_OPENGLES:
 278       max_version = screen->max_gl_es1_version;
 279       break;
 280    case API_OPENGLES2:
 281       max_version = screen->max_gl_es2_version;
 282       break;
 283    default:
 284       max_version = 0;
 285       break;
 286    }
 287
 288    if (max_version == 0) {
 289       *dri_ctx_error = __DRI_CTX_ERROR_BAD_API;
 290       return false;
 291    } else if (req_version > max_version) {
 292       *dri_ctx_error = __DRI_CTX_ERROR_BAD_VERSION;
 293       return false;
 294    }
 295
 296    return true;
 297 }
 298
 299 /*****************************************************************/
 300 /** \name Context handling functions                             */
 301 /*****************************************************************/
 302 /*@{*/
 303
 304 static __DRIcontext *
 305 driCreateContextAttribs(__DRIscreen *screen, int api,
 306                         const __DRIconfig *config,
 307                         __DRIcontext *shared,
 308                         unsigned num_attribs,
 309                         const uint32_t *attribs,
 310                         unsigned *error,
 311                         void *data)
 312 {
 313     __DRIcontext *context;
 314     const struct gl_config *modes = (config != NULL) ? &config->modes : NULL;
 315     void *shareCtx = (shared != NULL) ? shared->driverPrivate : NULL;
 316     gl_api mesa_api;
 317     unsigned major_version = 1;
 318     unsigned minor_version = 0;
 319     uint32_t flags = 0;
 320     bool notify_reset = false;
 321
 322     assert((num_attribs == 0) || (attribs != NULL));
 323
 324     if (!(screen->api_mask & (1 << api))) {
 325         *error = __DRI_CTX_ERROR_BAD_API;
 326         return NULL;
 327     }
 328
 329     switch (api) {
 330     case __DRI_API_OPENGL:
 331         mesa_api = API_OPENGL_COMPAT;
 332         break;
 333     case __DRI_API_GLES:
 334         mesa_api = API_OPENGLES;
 335         break;
 336     case __DRI_API_GLES2:
 337     case __DRI_API_GLES3:
 338         mesa_api = API_OPENGLES2;
 339         break;
 340     case __DRI_API_OPENGL_CORE:
 341         mesa_api = API_OPENGL_CORE;
 342         break;
 343     default:
 344         *error = __DRI_CTX_ERROR_BAD_API;
 345         return NULL;
 346     }
 347
 348     for (unsigned i = 0; i < num_attribs; i++) {
 349         switch (attribs[i * 2]) {
 350         case __DRI_CTX_ATTRIB_MAJOR_VERSION:
 351             major_version = attribs[i * 2 + 1];
 352             break;
 353         case __DRI_CTX_ATTRIB_MINOR_VERSION:
 354             minor_version = attribs[i * 2 + 1];
 355             break;
 356         case __DRI_CTX_ATTRIB_FLAGS:
 357             flags = attribs[i * 2 + 1];
 358             break;
 359         case __DRI_CTX_ATTRIB_RESET_STRATEGY:
 360             notify_reset = (attribs[i * 2 + 1]
 361                             != __DRI_CTX_RESET_NO_NOTIFICATION);
 362             break;
 363         default:
 364             /* We can't create a context that satisfies the requirements of an
 365              * attribute that we don't understand.  Return failure.
 366              */
 367             assert(!"Should not get here.");
 368             *error = __DRI_CTX_ERROR_UNKNOWN_ATTRIBUTE;
 369             return NULL;
 370         }
 371     }
 372
 373     /* Mesa does not support the GL_ARB_compatibilty extension or the
 374      * compatibility profile.  This means that we treat a API_OPENGL_COMPAT 3.1 as
 375      * API_OPENGL_CORE and reject API_OPENGL_COMPAT 3.2+.
 376      */
 377     if (mesa_api == API_OPENGL_COMPAT && major_version == 3 && minor_version == 1)
 378        mesa_api = API_OPENGL_CORE;
 379
 380     if (mesa_api == API_OPENGL_COMPAT
 381         && ((major_version > 3)
 382             || (major_version == 3 && minor_version >= 2))) {
 383        *error = __DRI_CTX_ERROR_BAD_API;
 384        return NULL;
 385     }
 386
 387     /* The latest version of EGL_KHR_create_context spec says:
 388      *
 389      *     "If the EGL_CONTEXT_OPENGL_DEBUG_BIT_KHR flag bit is set in
 390      *     EGL_CONTEXT_FLAGS_KHR, then a <debug context> will be created.
 391      *     [...] This bit is supported for OpenGL and OpenGL ES contexts.
 392      *
 393      * None of the other flags have any meaning in an ES context, so this seems safe.
 394      */
 395     if (mesa_api != API_OPENGL_COMPAT
 396         && mesa_api != API_OPENGL_CORE
 397         && (flags & ~__DRI_CTX_FLAG_DEBUG)) {
 398         *error = __DRI_CTX_ERROR_BAD_FLAG;
 399         return NULL;
 400     }
 401
 402     /* There are no forward-compatible contexts before OpenGL 3.0.  The
 403      * GLX_ARB_create_context spec says:
 404      *
 405      *     "Forward-compatible contexts are defined only for OpenGL versions
 406      *     3.0 and later."
 407      *
 408      * Forward-looking contexts are supported by silently converting the
 409      * requested API to API_OPENGL_CORE.
 410      *
 411      * In Mesa, a debug context is the same as a regular context.
 412      */
 413     if ((flags & __DRI_CTX_FLAG_FORWARD_COMPATIBLE) != 0) {
 414        mesa_api = API_OPENGL_CORE;
 415     }
 416
 417     const uint32_t allowed_flags = (__DRI_CTX_FLAG_DEBUG
 418                                     | __DRI_CTX_FLAG_FORWARD_COMPATIBLE
 419                                     | __DRI_CTX_FLAG_ROBUST_BUFFER_ACCESS);
 420     if (flags & ~allowed_flags) {
 421         *error = __DRI_CTX_ERROR_UNKNOWN_FLAG;
 422         return NULL;
 423     }
 424
 425     if (!validate_context_version(screen, mesa_api,
 426                                   major_version, minor_version, error))
 427        return NULL;
 428
 429     context = calloc(1, sizeof *context);
 430     if (!context) {
 431         *error = __DRI_CTX_ERROR_NO_MEMORY;
 432         return NULL;
 433     }
 434
 435     context->loaderPrivate = data;
 436
 437     context->driScreenPriv = screen;
 438     context->driDrawablePriv = NULL;
 439     context->driReadablePriv = NULL;
 440
 441     if (!screen->driver->CreateContext(mesa_api, modes, context,
 442                                        major_version, minor_version,
 443                                        flags, notify_reset, error, shareCtx)) {
 444         free(context);
 445         return NULL;
 446     }
 447
 448     *error = __DRI_CTX_ERROR_SUCCESS;
 449     return context;
 450 }
 451
 452 void
 453 driContextSetFlags(struct gl_context *ctx, uint32_t flags)
 454 {
 455     if ((flags & __DRI_CTX_FLAG_FORWARD_COMPATIBLE) != 0)
 456         ctx->Const.ContextFlags |= GL_CONTEXT_FLAG_FORWARD_COMPATIBLE_BIT;
 457     if ((flags & __DRI_CTX_FLAG_DEBUG) != 0) {
 458        _mesa_set_debug_state_int(ctx, GL_DEBUG_OUTPUT, GL_TRUE);
 459         ctx->Const.ContextFlags |= GL_CONTEXT_FLAG_DEBUG_BIT;
 460     }
 461 }
 462
 463 static __DRIcontext *
 464 driCreateNewContextForAPI(__DRIscreen *screen, int api,
 465                           const __DRIconfig *config,
 466                           __DRIcontext *shared, void *data)
 467 {
 468     unsigned error;
 469
 470     return driCreateContextAttribs(screen, api, config, shared, 0, NULL,
 471                                    &error, data);
 472 }
 473
 474 static __DRIcontext *
 475 driCreateNewContext(__DRIscreen *screen, const __DRIconfig *config,
 476                     __DRIcontext *shared, void *data)
 477 {
 478     return driCreateNewContextForAPI(screen, __DRI_API_OPENGL,
 479                                      config, shared, data);
 480 }
 481
 482 /**
 483  * Destroy the per-context private information.
 484  *
 485  * \internal
 486  * This function calls __DriverAPIRec::DestroyContext on \p contextPrivate, calls
 487  * drmDestroyContext(), and finally frees \p contextPrivate.
 488  */
 489 static void
 490 driDestroyContext(__DRIcontext *pcp)
 491 {
 492     if (pcp) {
 493         pcp->driScreenPriv->driver->DestroyContext(pcp);
 494         free(pcp);
 495     }
 496 }
 497
 498 static int
 499 driCopyContext(__DRIcontext *dest, __DRIcontext *src, unsigned long mask)
 500 {
 501     (void) dest;
 502     (void) src;
 503     (void) mask;
 504     return GL_FALSE;
 505 }
 506
 507 /*@}*/
 508
 509
 510 /*****************************************************************/
 511 /** \name Context (un)binding functions                          */
 512 /*****************************************************************/
 513 /*@{*/
 514
 515 static void dri_get_drawable(__DRIdrawable *pdp);
 516 static void dri_put_drawable(__DRIdrawable *pdp);
 517
 518 /**
 519  * This function takes both a read buffer and a draw buffer.  This is needed
 520  * for \c glXMakeCurrentReadSGI or GLX 1.3's \c glXMakeContextCurrent
 521  * function.
 522  */
 523 static int driBindContext(__DRIcontext *pcp,
 524                           __DRIdrawable *pdp,
 525                           __DRIdrawable *prp)
 526 {
 527     /*
 528     ** Assume error checking is done properly in glXMakeCurrent before
 529     ** calling driUnbindContext.
 530     */
 531
 532     if (!pcp)
 533         return GL_FALSE;
 534
 535     /* Bind the drawable to the context */
 536     pcp->driDrawablePriv = pdp;
 537     pcp->driReadablePriv = prp;
 538     if (pdp) {
 539         pdp->driContextPriv = pcp;
 540         dri_get_drawable(pdp);
 541     }
 542     if (prp && pdp != prp) {
 543         dri_get_drawable(prp);
 544     }
 545
 546     return pcp->driScreenPriv->driver->MakeCurrent(pcp, pdp, prp);
 547 }
 548
 549 /**
 550  * Unbind context.
 551  *
 552  * \param scrn the screen.
 553  * \param gc context.
 554  *
 555  * \return \c GL_TRUE on success, or \c GL_FALSE on failure.
 556  *
 557  * \internal
 558  * This function calls __DriverAPIRec::UnbindContext, and then decrements
 559  * __DRIdrawableRec::refcount which must be non-zero for a successful
 560  * return.
 561  *
 562  * While casting the opaque private pointers associated with the parameters
 563  * into their respective real types it also assures they are not \c NULL.
 564  */
 565 static int driUnbindContext(__DRIcontext *pcp)
 566 {
 567     __DRIdrawable *pdp;
 568     __DRIdrawable *prp;
 569
 570     /*
 571     ** Assume error checking is done properly in glXMakeCurrent before
 572     ** calling driUnbindContext.
 573     */
 574
 575     if (pcp == NULL)
 576         return GL_FALSE;
 577
 578     /*
 579     ** Call driUnbindContext before checking for valid drawables
 580     ** to handle surfaceless contexts properly.
 581     */
 582     pcp->driScreenPriv->driver->UnbindContext(pcp);
 583
 584     pdp = pcp->driDrawablePriv;
 585     prp = pcp->driReadablePriv;
 586
 587     /* already unbound */
 588     if (!pdp && !prp)
 589         return GL_TRUE;
 590
 591     assert(pdp);
 592     if (pdp->refcount == 0) {
 593         /* ERROR!!! */
 594         return GL_FALSE;
 595     }
 596
 597     dri_put_drawable(pdp);
 598
 599     if (prp != pdp) {
 600         if (prp->refcount == 0) {
 601             /* ERROR!!! */
 602             return GL_FALSE;
 603         }
 604
 605         dri_put_drawable(prp);
 606     }
 607
 608     pcp->driDrawablePriv = NULL;
 609     pcp->driReadablePriv = NULL;
 610
 611     return GL_TRUE;
 612 }
 613
 614 /*@}*/
 615
 616
 617 static void dri_get_drawable(__DRIdrawable *pdp)
 618 {
 619     pdp->refcount++;
 620 }
 621
 622 static void dri_put_drawable(__DRIdrawable *pdp)
 623 {
 624     if (pdp) {
 625         pdp->refcount--;
 626         if (pdp->refcount)
 627             return;
 628
 629         pdp->driScreenPriv->driver->DestroyBuffer(pdp);
 630         free(pdp);
 631     }
 632 }
 633
 634 static __DRIdrawable *
 635 driCreateNewDrawable(__DRIscreen *screen,
 636                      const __DRIconfig *config,
 637                      void *data)
 638 {
 639     __DRIdrawable *pdraw;
 640
 641     pdraw = malloc(sizeof *pdraw);
 642     if (!pdraw)
 643         return NULL;
 644
 645     pdraw->loaderPrivate = data;
 646
 647     pdraw->driScreenPriv = screen;
 648     pdraw->driContextPriv = NULL;
 649     pdraw->refcount = 0;
 650     pdraw->lastStamp = 0;
 651     pdraw->w = 0;
 652     pdraw->h = 0;
 653
 654     dri_get_drawable(pdraw);
 655
 656     if (!screen->driver->CreateBuffer(screen, pdraw, &config->modes,
 657                                       GL_FALSE)) {
 658        free(pdraw);
 659        return NULL;
 660     }
 661
 662     pdraw->dri2.stamp = pdraw->lastStamp + 1;
 663
 664     return pdraw;
 665 }
 666
 667 static void
 668 driDestroyDrawable(__DRIdrawable *pdp)
 669 {
 670     dri_put_drawable(pdp);
 671 }
 672
 673 static __DRIbuffer *
 674 dri2AllocateBuffer(__DRIscreen *screen,
 675                    unsigned int attachment, unsigned int format,
 676                    int width, int height)
 677 {
 678     return screen->driver->AllocateBuffer(screen, attachment, format,
 679                                           width, height);
 680 }
 681
 682 static void
 683 dri2ReleaseBuffer(__DRIscreen *screen, __DRIbuffer *buffer)
 684 {
 685     screen->driver->ReleaseBuffer(screen, buffer);
 686 }
 687
 688
 689 static int
 690 dri2ConfigQueryb(__DRIscreen *screen, const char *var, unsigned char *val)
 691 {
 692    if (!driCheckOption(&screen->optionCache, var, DRI_BOOL))
 693       return -1;
 694
 695    *val = driQueryOptionb(&screen->optionCache, var);
 696
 697    return 0;
 698 }
 699
 700 static int
 701 dri2ConfigQueryi(__DRIscreen *screen, const char *var, int *val)
 702 {
 703    if (!driCheckOption(&screen->optionCache, var, DRI_INT) &&
 704        !driCheckOption(&screen->optionCache, var, DRI_ENUM))
 705       return -1;
 706
 707     *val = driQueryOptioni(&screen->optionCache, var);
 708
 709     return 0;
 710 }
 711
 712 static int
 713 dri2ConfigQueryf(__DRIscreen *screen, const char *var, float *val)
 714 {
 715    if (!driCheckOption(&screen->optionCache, var, DRI_FLOAT))
 716       return -1;
 717
 718     *val = driQueryOptionf(&screen->optionCache, var);
 719
 720     return 0;
 721 }
 722
 723 static unsigned int
 724 driGetAPIMask(__DRIscreen *screen)
 725 {
 726     return screen->api_mask;
 727 }
 728
 729 /**
 730  * swrast swapbuffers entrypoint.
 731  *
 732  * DRI2 implements this inside the loader with only flushes handled by the
 733  * driver.
 734  */
 735 static void
 736 driSwapBuffers(__DRIdrawable *pdp)
 737 {
 738     assert(pdp->driScreenPriv->swrast_loader);
 739
 740     pdp->driScreenPriv->driver->SwapBuffers(pdp);
 741 }
 742
 743 /** Core interface */
 744 const __DRIcoreExtension driCoreExtension = {
 745     .base = { __DRI_CORE, 1 },
 746
 747     .createNewScreen            = NULL,
 748     .destroyScreen              = driDestroyScreen,
 749     .getExtensions              = driGetExtensions,
 750     .getConfigAttrib            = driGetConfigAttrib,
 751     .indexConfigAttrib          = driIndexConfigAttrib,
 752     .createNewDrawable          = NULL,
 753     .destroyDrawable            = driDestroyDrawable,
 754     .swapBuffers                = driSwapBuffers, /* swrast */
 755     .createNewContext           = driCreateNewContext, /* swrast */
 756     .copyContext                = driCopyContext,
 757     .destroyContext             = driDestroyContext,
 758     .bindContext                = driBindContext,
 759     .unbindContext              = driUnbindContext
 760 };
 761
 762 /** DRI2 interface */
 763 const __DRIdri2Extension driDRI2Extension = {
 764     .base = { __DRI_DRI2, 4 },
 765
 766     .createNewScreen            = dri2CreateNewScreen,
 767     .createNewDrawable          = driCreateNewDrawable,
 768     .createNewContext           = driCreateNewContext,
 769     .getAPIMask                 = driGetAPIMask,
 770     .createNewContextForAPI     = driCreateNewContextForAPI,
 771     .allocateBuffer             = dri2AllocateBuffer,
 772     .releaseBuffer              = dri2ReleaseBuffer,
 773     .createContextAttribs       = driCreateContextAttribs,
 774     .createNewScreen2           = driCreateNewScreen2,
 775 };
 776
 777 const __DRIswrastExtension driSWRastExtension = {
 778     .base = { __DRI_SWRAST, 4 },
 779
 780     .createNewScreen            = driSWRastCreateNewScreen,
 781     .createNewDrawable          = driCreateNewDrawable,
 782     .createNewContextForAPI     = driCreateNewContextForAPI,
 783     .createContextAttribs       = driCreateContextAttribs,
 784     .createNewScreen2           = driSWRastCreateNewScreen2,
 785 };
 786
 787 const __DRI2configQueryExtension dri2ConfigQueryExtension = {
 788    .base = { __DRI2_CONFIG_QUERY, 1 },
 789
 790    .configQueryb        = dri2ConfigQueryb,
 791    .configQueryi        = dri2ConfigQueryi,
 792    .configQueryf        = dri2ConfigQueryf,
 793 };
 794
 795 void
 796 dri2InvalidateDrawable(__DRIdrawable *drawable)
 797 {
 798     drawable->dri2.stamp++;
 799 }
 800
 801 /**
 802  * Check that the gl_framebuffer associated with dPriv is the right size.
 803  * Resize the gl_framebuffer if needed.
 804  * It's expected that the dPriv->driverPrivate member points to a
 805  * gl_framebuffer object.
 806  */
 807 void
 808 driUpdateFramebufferSize(struct gl_context *ctx, const __DRIdrawable *dPriv)
 809 {
 810    struct gl_framebuffer *fb = (struct gl_framebuffer *) dPriv->driverPrivate;
 811    if (fb && (dPriv->w != fb->Width || dPriv->h != fb->Height)) {
 812       ctx->Driver.ResizeBuffers(ctx, fb, dPriv->w, dPriv->h);
 813       /* if the driver needs the hw lock for ResizeBuffers, the drawable
 814          might have changed again by now */
 815       assert(fb->Width == dPriv->w);
 816       assert(fb->Height == dPriv->h);
 817    }
 818 }
 819
 820 uint32_t
 821 driGLFormatToImageFormat(mesa_format format)
 822 {
 823    switch (format) {
 824    case MESA_FORMAT_B5G6R5_UNORM:
 825       return __DRI_IMAGE_FORMAT_RGB565;
 826    case MESA_FORMAT_B8G8R8X8_UNORM:
 827       return __DRI_IMAGE_FORMAT_XRGB8888;
 828    case MESA_FORMAT_B10G10R10A2_UNORM:
 829       return __DRI_IMAGE_FORMAT_ARGB2101010;
 830    case MESA_FORMAT_B10G10R10X2_UNORM:
 831       return __DRI_IMAGE_FORMAT_XRGB2101010;
 832    case MESA_FORMAT_B8G8R8A8_UNORM:
 833       return __DRI_IMAGE_FORMAT_ARGB8888;
 834    case MESA_FORMAT_R8G8B8A8_UNORM:
 835       return __DRI_IMAGE_FORMAT_ABGR8888;
 836    case MESA_FORMAT_R8G8B8X8_UNORM:
 837       return __DRI_IMAGE_FORMAT_XBGR8888;
 838    case MESA_FORMAT_R_UNORM8:
 839       return __DRI_IMAGE_FORMAT_R8;
 840    case MESA_FORMAT_R8G8_UNORM:
 841       return __DRI_IMAGE_FORMAT_GR88;
 842    case MESA_FORMAT_NONE:
 843       return __DRI_IMAGE_FORMAT_NONE;
 844    case MESA_FORMAT_B8G8R8A8_SRGB:
 845       return __DRI_IMAGE_FORMAT_SARGB8;
 846    default:
 847       return 0;
 848    }
 849 }
 850
 851 mesa_format
 852 driImageFormatToGLFormat(uint32_t image_format)
 853 {
 854    switch (image_format) {
 855    case __DRI_IMAGE_FORMAT_RGB565:
 856       return MESA_FORMAT_B5G6R5_UNORM;
 857    case __DRI_IMAGE_FORMAT_XRGB8888:
 858       return MESA_FORMAT_B8G8R8X8_UNORM;
 859    case __DRI_IMAGE_FORMAT_ARGB2101010:
 860       return MESA_FORMAT_B10G10R10A2_UNORM;
 861    case __DRI_IMAGE_FORMAT_XRGB2101010:
 862       return MESA_FORMAT_B10G10R10X2_UNORM;
 863    case __DRI_IMAGE_FORMAT_ARGB8888:
 864       return MESA_FORMAT_B8G8R8A8_UNORM;
 865    case __DRI_IMAGE_FORMAT_ABGR8888:
 866       return MESA_FORMAT_R8G8B8A8_UNORM;
 867    case __DRI_IMAGE_FORMAT_XBGR8888:
 868       return MESA_FORMAT_R8G8B8X8_UNORM;
 869    case __DRI_IMAGE_FORMAT_R8:
 870       return MESA_FORMAT_R_UNORM8;
 871    case __DRI_IMAGE_FORMAT_GR88:
 872       return MESA_FORMAT_R8G8_UNORM;
 873    case __DRI_IMAGE_FORMAT_SARGB8:
 874       return MESA_FORMAT_B8G8R8A8_SRGB;
 875    case __DRI_IMAGE_FORMAT_NONE:
 876       return MESA_FORMAT_NONE;
 877    default:
 878       return MESA_FORMAT_NONE;
 879    }
 880 }
 881
 882 /** Image driver interface */
 883 const __DRIimageDriverExtension driImageDriverExtension = {
 884     .base = { __DRI_IMAGE_DRIVER, 1 },
 885
 886     .createNewScreen2           = driCreateNewScreen2,
 887     .createNewDrawable          = driCreateNewDrawable,
 888     .getAPIMask                 = driGetAPIMask,
 889     .createContextAttribs       = driCreateContextAttribs,
 890 };
 891
 892 /* swrast copy sub buffer entrypoint. */
 893 static void driCopySubBuffer(__DRIdrawable *pdp, int x, int y,
 894                              int w, int h)
 895 {
 896     assert(pdp->driScreenPriv->swrast_loader);
 897
 898     pdp->driScreenPriv->driver->CopySubBuffer(pdp, x, y, w, h);
 899 }
 900
 901 /* for swrast only */
 902 const __DRIcopySubBufferExtension driCopySubBufferExtension = {
 903    .base = { __DRI_COPY_SUB_BUFFER, 1 },
 904
 905    .copySubBuffer               = driCopySubBuffer,
 906 };