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

   1 /*
   2  * (C) Copyright IBM Corporation 2002, 2004
   3  * All Rights Reserved.
   4  *
   5  * Permission is hereby granted, free of charge, to any person obtaining a
   6  * copy of this software and associated documentation files (the "Software"),
   7  * to deal in the Software without restriction, including without limitation
   8  * on the rights to use, copy, modify, merge, publish, distribute, sub
   9  * license, and/or sell copies of the Software, and to permit persons to whom
  10  * the Software is furnished to do so, subject to the following conditions:
  11  *
  12  * The above copyright notice and this permission notice (including the next
  13  * paragraph) shall be included in all copies or substantial portions of the
  14  * Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.  IN NO EVENT SHALL
  19  * THE AUTHORS AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM,
  20  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
  21  * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
  22  * USE OR OTHER DEALINGS IN THE SOFTWARE.
  23  */
  24
  25 /**
  26  * \file dri_util.c
  27  * DRI utility functions.
  28  *
  29  * This module acts as glue between GLX and the actual hardware driver.  A DRI
  30  * driver doesn't really \e have to use any of this - it's optional.  But, some
  31  * useful stuff is done here that otherwise would have to be duplicated in most
  32  * drivers.
  33  *
  34  * Basically, these utility functions take care of some of the dirty details of
  35  * screen initialization, context creation, context binding, DRM setup, etc.
  36  *
  37  * These functions are compiled into each DRI driver so libGL.so knows nothing
  38  * about them.
  39  */
  40
  41
  42 #include <stdbool.h>
  43 #ifndef __NOT_HAVE_DRM_H
  44 #include <xf86drm.h>
  45 #endif
  46 #include "dri_util.h"
  47 #include "utils.h"
  48 #include "xmlpool.h"
  49 #include "../glsl/glsl_parser_extras.h"
  50 #include "main/mtypes.h"
  51 #include "main/version.h"
  52 #include "main/macros.h"
  53
  54 PUBLIC const char __dri2ConfigOptions[] =
  55    DRI_CONF_BEGIN
  56       DRI_CONF_SECTION_PERFORMANCE
  57          DRI_CONF_VBLANK_MODE(DRI_CONF_VBLANK_DEF_INTERVAL_1)
  58       DRI_CONF_SECTION_END
  59    DRI_CONF_END;
  60
  61 /*****************************************************************/
  62 /** \name Screen handling functions                              */
  63 /*****************************************************************/
  64 /*@{*/
  65
  66 static void
  67 setupLoaderExtensions(__DRIscreen *psp,
  68                       const __DRIextension **extensions)
  69 {
  70     int i;
  71
  72     for (i = 0; extensions[i]; i++) {
  73         if (strcmp(extensions[i]->name, __DRI_DRI2_LOADER) == 0)
  74             psp->dri2.loader = (__DRIdri2LoaderExtension *) extensions[i];
  75         if (strcmp(extensions[i]->name, __DRI_IMAGE_LOOKUP) == 0)
  76             psp->dri2.image = (__DRIimageLookupExtension *) extensions[i];
  77         if (strcmp(extensions[i]->name, __DRI_USE_INVALIDATE) == 0)
  78             psp->dri2.useInvalidate = (__DRIuseInvalidateExtension *) extensions[i];
  79         if (strcmp(extensions[i]->name, __DRI_SWRAST_LOADER) == 0)
  80             psp->swrast_loader = (__DRIswrastLoaderExtension *) extensions[i];
  81         if (strcmp(extensions[i]->name, __DRI_IMAGE_LOADER) == 0)
  82            psp->image.loader = (__DRIimageLoaderExtension *) extensions[i];
  83     }
  84 }
  85
  86 /**
  87  * This pointer determines which driver API we'll use in the case of the
  88  * loader not passing us an explicit driver extensions list (that would,
  89  * itself, contain a pointer to a driver API.)
  90  *
  91  * A driver's driDriverGetExtensions_drivername() can update this pointer to
  92  * what it's returning, and a loader that is ignorant of createNewScreen2()
  93  * will get the correct driver screen created, as long as no other
  94  * driDriverGetExtensions() happened in between the first one and the
  95  * createNewScreen().
  96  *
  97  * This allows the X Server to not require the significant dri_interface.h
  98  * updates for doing createNewScreen2(), which would discourage backporting of
  99  * the X Server patches to support the new loader interface.
 100  */
 101 const struct __DriverAPIRec *globalDriverAPI = &driDriverAPI;
 102
 103 /**
 104  * This is the first entrypoint in the driver called by the DRI driver loader
 105  * after dlopen()ing it.
 106  *
 107  * It's used to create global state for the driver across contexts on the same
 108  * Display.
 109  */
 110 static __DRIscreen *
 111 driCreateNewScreen2(int scrn, int fd,
 112                     const __DRIextension **extensions,
 113                     const __DRIextension **driver_extensions,
 114                     const __DRIconfig ***driver_configs, void *data)
 115 {
 116     static const __DRIextension *emptyExtensionList[] = { NULL };
 117     __DRIscreen *psp;
 118
 119     psp = calloc(1, sizeof(*psp));
 120     if (!psp)
 121         return NULL;
 122
 123     /* By default, use the global driDriverAPI symbol (non-megadrivers). */
 124     psp->driver = globalDriverAPI;
 125
 126     /* If the driver exposes its vtable through its extensions list
 127      * (megadrivers), use that instead.
 128      */
 129     if (driver_extensions) {
 130        for (int i = 0; driver_extensions[i]; i++) {
 131           if (strcmp(driver_extensions[i]->name, __DRI_DRIVER_VTABLE) == 0) {
 132              psp->driver =
 133                 ((__DRIDriverVtableExtension *)driver_extensions[i])->vtable;
 134           }
 135        }
 136     }
 137
 138     setupLoaderExtensions(psp, extensions);
 139
 140 #ifndef __NOT_HAVE_DRM_H
 141     if (fd != -1) {
 142        drmVersionPtr version = drmGetVersion(fd);
 143        if (version) {
 144           psp->drm_version.major = version->version_major;
 145           psp->drm_version.minor = version->version_minor;
 146           psp->drm_version.patch = version->version_patchlevel;
 147           drmFreeVersion(version);
 148        }
 149     }
 150 #endif
 151
 152     psp->loaderPrivate = data;
 153
 154     psp->extensions = emptyExtensionList;
 155     psp->fd = fd;
 156     psp->myNum = scrn;
 157
 158     *driver_configs = psp->driver->InitScreen(psp);
 159     if (*driver_configs == NULL) {
 160         free(psp);
 161         return NULL;
 162     }
 163
 164     int gl_version_override = _mesa_get_gl_version_override();
 165     if (gl_version_override >= 31) {
 166        psp->max_gl_core_version = MAX2(psp->max_gl_core_version,
 167                                        gl_version_override);
 168     } else {
 169        psp->max_gl_compat_version = MAX2(psp->max_gl_compat_version,
 170                                          gl_version_override);
 171     }
 172
 173     psp->api_mask = (1 << __DRI_API_OPENGL);
 174     if (psp->max_gl_core_version > 0)
 175        psp->api_mask |= (1 << __DRI_API_OPENGL_CORE);
 176     if (psp->max_gl_es1_version > 0)
 177        psp->api_mask |= (1 << __DRI_API_GLES);
 178     if (psp->max_gl_es2_version > 0)
 179        psp->api_mask |= (1 << __DRI_API_GLES2);
 180     if (psp->max_gl_es2_version >= 30)
 181        psp->api_mask |= (1 << __DRI_API_GLES3);
 182
 183     driParseOptionInfo(&psp->optionInfo, __dri2ConfigOptions);
 184     driParseConfigFiles(&psp->optionCache, &psp->optionInfo, psp->myNum, "dri2");
 185
 186
 187     return psp;
 188 }
 189
 190 static __DRIscreen *
 191 dri2CreateNewScreen(int scrn, int fd,
 192                     const __DRIextension **extensions,
 193                     const __DRIconfig ***driver_configs, void *data)
 194 {
 195    return driCreateNewScreen2(scrn, fd, extensions, NULL,
 196                                driver_configs, data);
 197 }
 198
 199 /** swrast driver createNewScreen entrypoint. */
 200 static __DRIscreen *
 201 driSWRastCreateNewScreen(int scrn, const __DRIextension **extensions,
 202                          const __DRIconfig ***driver_configs, void *data)
 203 {
 204    return driCreateNewScreen2(scrn, -1, extensions, NULL,
 205                                driver_configs, data);
 206 }
 207
 208 static __DRIscreen *
 209 driSWRastCreateNewScreen2(int scrn, const __DRIextension **extensions,
 210                           const __DRIextension **driver_extensions,
 211                           const __DRIconfig ***driver_configs, void *data)
 212 {
 213    return driCreateNewScreen2(scrn, -1, extensions, driver_extensions,
 214                                driver_configs, data);
 215 }
 216
 217 /**
 218  * Destroy the per-screen private information.
 219  *
 220  * \internal
 221  * This function calls __DriverAPIRec::DestroyScreen on \p screenPrivate, calls
 222  * drmClose(), and finally frees \p screenPrivate.
 223  */
 224 static void driDestroyScreen(__DRIscreen *psp)
 225 {
 226     if (psp) {
 227         /* No interaction with the X-server is possible at this point.  This
 228          * routine is called after XCloseDisplay, so there is no protocol
 229          * stream open to the X-server anymore.
 230          */
 231
 232        _mesa_destroy_shader_compiler();
 233
 234         psp->driver->DestroyScreen(psp);
 235
 236         driDestroyOptionCache(&psp->optionCache);
 237         driDestroyOptionInfo(&psp->optionInfo);
 238
 239         free(psp);
 240     }
 241 }
 242
 243 static const __DRIextension **driGetExtensions(__DRIscreen *psp)
 244 {
 245     return psp->extensions;
 246 }
 247
 248 /*@}*/
 249
 250
 251 static bool
 252 validate_context_version(__DRIscreen *screen,
 253                          int mesa_api,
 254                          unsigned major_version,
 255                          unsigned minor_version,
 256                          unsigned *dri_ctx_error)
 257 {
 258    unsigned req_version = 10 * major_version + minor_version;
 259    unsigned max_version = 0;
 260
 261    switch (mesa_api) {
 262    case API_OPENGL_COMPAT:
 263       max_version = screen->max_gl_compat_version;
 264       break;
 265    case API_OPENGL_CORE:
 266       max_version = screen->max_gl_core_version;
 267       break;
 268    case API_OPENGLES:
 269       max_version = screen->max_gl_es1_version;
 270       break;
 271    case API_OPENGLES2:
 272       max_version = screen->max_gl_es2_version;
 273       break;
 274    default:
 275       max_version = 0;
 276       break;
 277    }
 278
 279    if (max_version == 0) {
 280       *dri_ctx_error = __DRI_CTX_ERROR_BAD_API;
 281       return false;
 282    } else if (req_version > max_version) {
 283       *dri_ctx_error = __DRI_CTX_ERROR_BAD_VERSION;
 284       return false;
 285    }
 286
 287    return true;
 288 }
 289
 290 /*****************************************************************/
 291 /** \name Context handling functions                             */
 292 /*****************************************************************/
 293 /*@{*/
 294
 295 static __DRIcontext *
 296 driCreateContextAttribs(__DRIscreen *screen, int api,
 297                         const __DRIconfig *config,
 298                         __DRIcontext *shared,
 299                         unsigned num_attribs,
 300                         const uint32_t *attribs,
 301                         unsigned *error,
 302                         void *data)
 303 {
 304     __DRIcontext *context;
 305     const struct gl_config *modes = (config != NULL) ? &config->modes : NULL;
 306     void *shareCtx = (shared != NULL) ? shared->driverPrivate : NULL;
 307     gl_api mesa_api;
 308     unsigned major_version = 1;
 309     unsigned minor_version = 0;
 310     uint32_t flags = 0;
 311     bool notify_reset = false;
 312
 313     assert((num_attribs == 0) || (attribs != NULL));
 314
 315     if (!(screen->api_mask & (1 << api))) {
 316         *error = __DRI_CTX_ERROR_BAD_API;
 317         return NULL;
 318     }
 319
 320     switch (api) {
 321     case __DRI_API_OPENGL:
 322         mesa_api = API_OPENGL_COMPAT;
 323         break;
 324     case __DRI_API_GLES:
 325         mesa_api = API_OPENGLES;
 326         break;
 327     case __DRI_API_GLES2:
 328     case __DRI_API_GLES3:
 329         mesa_api = API_OPENGLES2;
 330         break;
 331     case __DRI_API_OPENGL_CORE:
 332         mesa_api = API_OPENGL_CORE;
 333         break;
 334     default:
 335         *error = __DRI_CTX_ERROR_BAD_API;
 336         return NULL;
 337     }
 338
 339     for (unsigned i = 0; i < num_attribs; i++) {
 340         switch (attribs[i * 2]) {
 341         case __DRI_CTX_ATTRIB_MAJOR_VERSION:
 342             major_version = attribs[i * 2 + 1];
 343             break;
 344         case __DRI_CTX_ATTRIB_MINOR_VERSION:
 345             minor_version = attribs[i * 2 + 1];
 346             break;
 347         case __DRI_CTX_ATTRIB_FLAGS:
 348             flags = attribs[i * 2 + 1];
 349             break;
 350         case __DRI_CTX_ATTRIB_RESET_STRATEGY:
 351             notify_reset = (attribs[i * 2 + 1]
 352                             != __DRI_CTX_RESET_NO_NOTIFICATION);
 353             break;
 354         default:
 355             /* We can't create a context that satisfies the requirements of an
 356              * attribute that we don't understand.  Return failure.
 357              */
 358             assert(!"Should not get here.");
 359             *error = __DRI_CTX_ERROR_UNKNOWN_ATTRIBUTE;
 360             return NULL;
 361         }
 362     }
 363
 364     /* Mesa does not support the GL_ARB_compatibilty extension or the
 365      * compatibility profile.  This means that we treat a API_OPENGL_COMPAT 3.1 as
 366      * API_OPENGL_CORE and reject API_OPENGL_COMPAT 3.2+.
 367      */
 368     if (mesa_api == API_OPENGL_COMPAT && major_version == 3 && minor_version == 1)
 369        mesa_api = API_OPENGL_CORE;
 370
 371     if (mesa_api == API_OPENGL_COMPAT
 372         && ((major_version > 3)
 373             || (major_version == 3 && minor_version >= 2))) {
 374        *error = __DRI_CTX_ERROR_BAD_API;
 375        return NULL;
 376     }
 377
 378     /* The EGL_KHR_create_context spec says:
 379      *
 380      *     "Flags are only defined for OpenGL context creation, and specifying
 381      *     a flags value other than zero for other types of contexts,
 382      *     including OpenGL ES contexts, will generate an error."
 383      *
 384      * The GLX_EXT_create_context_es2_profile specification doesn't say
 385      * anything specific about this case.  However, none of the known flags
 386      * have any meaning in an ES context, so this seems safe.
 387      */
 388     if (mesa_api != API_OPENGL_COMPAT
 389         && mesa_api != API_OPENGL_CORE
 390         && flags != 0) {
 391         *error = __DRI_CTX_ERROR_BAD_FLAG;
 392         return NULL;
 393     }
 394
 395     /* There are no forward-compatible contexts before OpenGL 3.0.  The
 396      * GLX_ARB_create_context spec says:
 397      *
 398      *     "Forward-compatible contexts are defined only for OpenGL versions
 399      *     3.0 and later."
 400      *
 401      * Forward-looking contexts are supported by silently converting the
 402      * requested API to API_OPENGL_CORE.
 403      *
 404      * In Mesa, a debug context is the same as a regular context.
 405      */
 406     if ((flags & __DRI_CTX_FLAG_FORWARD_COMPATIBLE) != 0) {
 407        mesa_api = API_OPENGL_CORE;
 408     }
 409
 410     const uint32_t allowed_flags = (__DRI_CTX_FLAG_DEBUG
 411                                     | __DRI_CTX_FLAG_FORWARD_COMPATIBLE
 412                                     | __DRI_CTX_FLAG_ROBUST_BUFFER_ACCESS);
 413     if (flags & ~allowed_flags) {
 414         *error = __DRI_CTX_ERROR_UNKNOWN_FLAG;
 415         return NULL;
 416     }
 417
 418     if (!validate_context_version(screen, mesa_api,
 419                                   major_version, minor_version, error))
 420        return NULL;
 421
 422     context = calloc(1, sizeof *context);
 423     if (!context) {
 424         *error = __DRI_CTX_ERROR_NO_MEMORY;
 425         return NULL;
 426     }
 427
 428     context->loaderPrivate = data;
 429
 430     context->driScreenPriv = screen;
 431     context->driDrawablePriv = NULL;
 432     context->driReadablePriv = NULL;
 433
 434     if (!screen->driver->CreateContext(mesa_api, modes, context,
 435                                        major_version, minor_version,
 436                                        flags, notify_reset, error, shareCtx)) {
 437         free(context);
 438         return NULL;
 439     }
 440
 441     *error = __DRI_CTX_ERROR_SUCCESS;
 442     return context;
 443 }
 444
 445 void
 446 driContextSetFlags(struct gl_context *ctx, uint32_t flags)
 447 {
 448     if ((flags & __DRI_CTX_FLAG_FORWARD_COMPATIBLE) != 0)
 449         ctx->Const.ContextFlags |= GL_CONTEXT_FLAG_FORWARD_COMPATIBLE_BIT;
 450     if ((flags & __DRI_CTX_FLAG_DEBUG) != 0) {
 451         ctx->Const.ContextFlags |= GL_CONTEXT_FLAG_DEBUG_BIT;
 452         ctx->Debug.DebugOutput = GL_TRUE;
 453     }
 454 }
 455
 456 static __DRIcontext *
 457 driCreateNewContextForAPI(__DRIscreen *screen, int api,
 458                           const __DRIconfig *config,
 459                           __DRIcontext *shared, void *data)
 460 {
 461     unsigned error;
 462
 463     return driCreateContextAttribs(screen, api, config, shared, 0, NULL,
 464                                    &error, data);
 465 }
 466
 467 static __DRIcontext *
 468 driCreateNewContext(__DRIscreen *screen, const __DRIconfig *config,
 469                     __DRIcontext *shared, void *data)
 470 {
 471     return driCreateNewContextForAPI(screen, __DRI_API_OPENGL,
 472                                      config, shared, data);
 473 }
 474
 475 /**
 476  * Destroy the per-context private information.
 477  *
 478  * \internal
 479  * This function calls __DriverAPIRec::DestroyContext on \p contextPrivate, calls
 480  * drmDestroyContext(), and finally frees \p contextPrivate.
 481  */
 482 static void
 483 driDestroyContext(__DRIcontext *pcp)
 484 {
 485     if (pcp) {
 486         pcp->driScreenPriv->driver->DestroyContext(pcp);
 487         free(pcp);
 488     }
 489 }
 490
 491 static int
 492 driCopyContext(__DRIcontext *dest, __DRIcontext *src, unsigned long mask)
 493 {
 494     (void) dest;
 495     (void) src;
 496     (void) mask;
 497     return GL_FALSE;
 498 }
 499
 500 /*@}*/
 501
 502
 503 /*****************************************************************/
 504 /** \name Context (un)binding functions                          */
 505 /*****************************************************************/
 506 /*@{*/
 507
 508 static void dri_get_drawable(__DRIdrawable *pdp);
 509 static void dri_put_drawable(__DRIdrawable *pdp);
 510
 511 /**
 512  * This function takes both a read buffer and a draw buffer.  This is needed
 513  * for \c glXMakeCurrentReadSGI or GLX 1.3's \c glXMakeContextCurrent
 514  * function.
 515  */
 516 static int driBindContext(__DRIcontext *pcp,
 517                           __DRIdrawable *pdp,
 518                           __DRIdrawable *prp)
 519 {
 520     /*
 521     ** Assume error checking is done properly in glXMakeCurrent before
 522     ** calling driUnbindContext.
 523     */
 524
 525     if (!pcp)
 526         return GL_FALSE;
 527
 528     /* Bind the drawable to the context */
 529     pcp->driDrawablePriv = pdp;
 530     pcp->driReadablePriv = prp;
 531     if (pdp) {
 532         pdp->driContextPriv = pcp;
 533         dri_get_drawable(pdp);
 534     }
 535     if (prp && pdp != prp) {
 536         dri_get_drawable(prp);
 537     }
 538
 539     return pcp->driScreenPriv->driver->MakeCurrent(pcp, pdp, prp);
 540 }
 541
 542 /**
 543  * Unbind context.
 544  *
 545  * \param scrn the screen.
 546  * \param gc context.
 547  *
 548  * \return \c GL_TRUE on success, or \c GL_FALSE on failure.
 549  *
 550  * \internal
 551  * This function calls __DriverAPIRec::UnbindContext, and then decrements
 552  * __DRIdrawableRec::refcount which must be non-zero for a successful
 553  * return.
 554  *
 555  * While casting the opaque private pointers associated with the parameters
 556  * into their respective real types it also assures they are not \c NULL.
 557  */
 558 static int driUnbindContext(__DRIcontext *pcp)
 559 {
 560     __DRIdrawable *pdp;
 561     __DRIdrawable *prp;
 562
 563     /*
 564     ** Assume error checking is done properly in glXMakeCurrent before
 565     ** calling driUnbindContext.
 566     */
 567
 568     if (pcp == NULL)
 569         return GL_FALSE;
 570
 571     pdp = pcp->driDrawablePriv;
 572     prp = pcp->driReadablePriv;
 573
 574     /* already unbound */
 575     if (!pdp && !prp)
 576         return GL_TRUE;
 577
 578     pcp->driScreenPriv->driver->UnbindContext(pcp);
 579
 580     assert(pdp);
 581     if (pdp->refcount == 0) {
 582         /* ERROR!!! */
 583         return GL_FALSE;
 584     }
 585
 586     dri_put_drawable(pdp);
 587
 588     if (prp != pdp) {
 589         if (prp->refcount == 0) {
 590             /* ERROR!!! */
 591             return GL_FALSE;
 592         }
 593
 594         dri_put_drawable(prp);
 595     }
 596
 597     pcp->driDrawablePriv = NULL;
 598     pcp->driReadablePriv = NULL;
 599
 600     return GL_TRUE;
 601 }
 602
 603 /*@}*/
 604
 605
 606 static void dri_get_drawable(__DRIdrawable *pdp)
 607 {
 608     pdp->refcount++;
 609 }
 610
 611 static void dri_put_drawable(__DRIdrawable *pdp)
 612 {
 613     if (pdp) {
 614         pdp->refcount--;
 615         if (pdp->refcount)
 616             return;
 617
 618         pdp->driScreenPriv->driver->DestroyBuffer(pdp);
 619         free(pdp);
 620     }
 621 }
 622
 623 static __DRIdrawable *
 624 driCreateNewDrawable(__DRIscreen *screen,
 625                      const __DRIconfig *config,
 626                      void *data)
 627 {
 628     __DRIdrawable *pdraw;
 629
 630     pdraw = malloc(sizeof *pdraw);
 631     if (!pdraw)
 632         return NULL;
 633
 634     pdraw->loaderPrivate = data;
 635
 636     pdraw->driScreenPriv = screen;
 637     pdraw->driContextPriv = NULL;
 638     pdraw->refcount = 0;
 639     pdraw->lastStamp = 0;
 640     pdraw->w = 0;
 641     pdraw->h = 0;
 642
 643     dri_get_drawable(pdraw);
 644
 645     if (!screen->driver->CreateBuffer(screen, pdraw, &config->modes,
 646                                       GL_FALSE)) {
 647        free(pdraw);
 648        return NULL;
 649     }
 650
 651     pdraw->dri2.stamp = pdraw->lastStamp + 1;
 652
 653     return pdraw;
 654 }
 655
 656 static void
 657 driDestroyDrawable(__DRIdrawable *pdp)
 658 {
 659     dri_put_drawable(pdp);
 660 }
 661
 662 static __DRIbuffer *
 663 dri2AllocateBuffer(__DRIscreen *screen,
 664                    unsigned int attachment, unsigned int format,
 665                    int width, int height)
 666 {
 667     return screen->driver->AllocateBuffer(screen, attachment, format,
 668                                           width, height);
 669 }
 670
 671 static void
 672 dri2ReleaseBuffer(__DRIscreen *screen, __DRIbuffer *buffer)
 673 {
 674     screen->driver->ReleaseBuffer(screen, buffer);
 675 }
 676
 677
 678 static int
 679 dri2ConfigQueryb(__DRIscreen *screen, const char *var, GLboolean *val)
 680 {
 681    if (!driCheckOption(&screen->optionCache, var, DRI_BOOL))
 682       return -1;
 683
 684    *val = driQueryOptionb(&screen->optionCache, var);
 685
 686    return 0;
 687 }
 688
 689 static int
 690 dri2ConfigQueryi(__DRIscreen *screen, const char *var, GLint *val)
 691 {
 692    if (!driCheckOption(&screen->optionCache, var, DRI_INT) &&
 693        !driCheckOption(&screen->optionCache, var, DRI_ENUM))
 694       return -1;
 695
 696     *val = driQueryOptioni(&screen->optionCache, var);
 697
 698     return 0;
 699 }
 700
 701 static int
 702 dri2ConfigQueryf(__DRIscreen *screen, const char *var, GLfloat *val)
 703 {
 704    if (!driCheckOption(&screen->optionCache, var, DRI_FLOAT))
 705       return -1;
 706
 707     *val = driQueryOptionf(&screen->optionCache, var);
 708
 709     return 0;
 710 }
 711
 712 static unsigned int
 713 driGetAPIMask(__DRIscreen *screen)
 714 {
 715     return screen->api_mask;
 716 }
 717
 718 /**
 719  * swrast swapbuffers entrypoint.
 720  *
 721  * DRI2 implements this inside the loader with only flushes handled by the
 722  * driver.
 723  */
 724 static void
 725 driSwapBuffers(__DRIdrawable *pdp)
 726 {
 727     assert(pdp->driScreenPriv->swrast_loader);
 728
 729     pdp->driScreenPriv->driver->SwapBuffers(pdp);
 730 }
 731
 732 /** Core interface */
 733 const __DRIcoreExtension driCoreExtension = {
 734     .base = { __DRI_CORE, __DRI_CORE_VERSION },
 735
 736     .createNewScreen            = NULL,
 737     .destroyScreen              = driDestroyScreen,
 738     .getExtensions              = driGetExtensions,
 739     .getConfigAttrib            = driGetConfigAttrib,
 740     .indexConfigAttrib          = driIndexConfigAttrib,
 741     .createNewDrawable          = NULL,
 742     .destroyDrawable            = driDestroyDrawable,
 743     .swapBuffers                = driSwapBuffers, /* swrast */
 744     .createNewContext           = driCreateNewContext, /* swrast */
 745     .copyContext                = driCopyContext,
 746     .destroyContext             = driDestroyContext,
 747     .bindContext                = driBindContext,
 748     .unbindContext              = driUnbindContext
 749 };
 750
 751 /** DRI2 interface */
 752 const __DRIdri2Extension driDRI2Extension = {
 753     .base = { __DRI_DRI2, 4 },
 754
 755     .createNewScreen            = dri2CreateNewScreen,
 756     .createNewDrawable          = driCreateNewDrawable,
 757     .createNewContext           = driCreateNewContext,
 758     .getAPIMask                 = driGetAPIMask,
 759     .createNewContextForAPI     = driCreateNewContextForAPI,
 760     .allocateBuffer             = dri2AllocateBuffer,
 761     .releaseBuffer              = dri2ReleaseBuffer,
 762     .createContextAttribs       = driCreateContextAttribs,
 763     .createNewScreen2           = driCreateNewScreen2,
 764 };
 765
 766 const __DRIswrastExtension driSWRastExtension = {
 767     { __DRI_SWRAST, 4 },
 768     driSWRastCreateNewScreen,
 769     driCreateNewDrawable,
 770     driCreateNewContextForAPI,
 771     driCreateContextAttribs,
 772     driSWRastCreateNewScreen2,
 773 };
 774
 775 const __DRI2configQueryExtension dri2ConfigQueryExtension = {
 776    .base = { __DRI2_CONFIG_QUERY, __DRI2_CONFIG_QUERY_VERSION },
 777
 778    .configQueryb        = dri2ConfigQueryb,
 779    .configQueryi        = dri2ConfigQueryi,
 780    .configQueryf        = dri2ConfigQueryf,
 781 };
 782
 783 void
 784 dri2InvalidateDrawable(__DRIdrawable *drawable)
 785 {
 786     drawable->dri2.stamp++;
 787 }
 788
 789 /**
 790  * Check that the gl_framebuffer associated with dPriv is the right size.
 791  * Resize the gl_framebuffer if needed.
 792  * It's expected that the dPriv->driverPrivate member points to a
 793  * gl_framebuffer object.
 794  */
 795 void
 796 driUpdateFramebufferSize(struct gl_context *ctx, const __DRIdrawable *dPriv)
 797 {
 798    struct gl_framebuffer *fb = (struct gl_framebuffer *) dPriv->driverPrivate;
 799    if (fb && (dPriv->w != fb->Width || dPriv->h != fb->Height)) {
 800       ctx->Driver.ResizeBuffers(ctx, fb, dPriv->w, dPriv->h);
 801       /* if the driver needs the hw lock for ResizeBuffers, the drawable
 802          might have changed again by now */
 803       assert(fb->Width == dPriv->w);
 804       assert(fb->Height == dPriv->h);
 805    }
 806 }
 807
 808 uint32_t
 809 driGLFormatToImageFormat(mesa_format format)
 810 {
 811    switch (format) {
 812    case MESA_FORMAT_RGB565:
 813       return __DRI_IMAGE_FORMAT_RGB565;
 814    case MESA_FORMAT_B8G8R8X8_UNORM:
 815       return __DRI_IMAGE_FORMAT_XRGB8888;
 816    case MESA_FORMAT_ARGB2101010:
 817       return __DRI_IMAGE_FORMAT_ARGB2101010;
 818    case MESA_FORMAT_XRGB2101010_UNORM:
 819       return __DRI_IMAGE_FORMAT_XRGB2101010;
 820    case MESA_FORMAT_B8G8R8A8_UNORM:
 821       return __DRI_IMAGE_FORMAT_ARGB8888;
 822    case MESA_FORMAT_R8G8B8A8_UNORM:
 823       return __DRI_IMAGE_FORMAT_ABGR8888;
 824    case MESA_FORMAT_R8G8B8X8_UNORM:
 825       return __DRI_IMAGE_FORMAT_XBGR8888;
 826    case MESA_FORMAT_R8:
 827       return __DRI_IMAGE_FORMAT_R8;
 828    case MESA_FORMAT_GR88:
 829       return __DRI_IMAGE_FORMAT_GR88;
 830    case MESA_FORMAT_NONE:
 831       return __DRI_IMAGE_FORMAT_NONE;
 832    case MESA_FORMAT_SARGB8:
 833       return __DRI_IMAGE_FORMAT_SARGB8;
 834    default:
 835       return 0;
 836    }
 837 }
 838
 839 mesa_format
 840 driImageFormatToGLFormat(uint32_t image_format)
 841 {
 842    switch (image_format) {
 843    case __DRI_IMAGE_FORMAT_RGB565:
 844       return MESA_FORMAT_RGB565;
 845    case __DRI_IMAGE_FORMAT_XRGB8888:
 846       return MESA_FORMAT_B8G8R8X8_UNORM;
 847    case __DRI_IMAGE_FORMAT_ARGB2101010:
 848       return MESA_FORMAT_ARGB2101010;
 849    case __DRI_IMAGE_FORMAT_XRGB2101010:
 850       return MESA_FORMAT_XRGB2101010_UNORM;
 851    case __DRI_IMAGE_FORMAT_ARGB8888:
 852       return MESA_FORMAT_B8G8R8A8_UNORM;
 853    case __DRI_IMAGE_FORMAT_ABGR8888:
 854       return MESA_FORMAT_R8G8B8A8_UNORM;
 855    case __DRI_IMAGE_FORMAT_XBGR8888:
 856       return MESA_FORMAT_R8G8B8X8_UNORM;
 857    case __DRI_IMAGE_FORMAT_R8:
 858       return MESA_FORMAT_R8;
 859    case __DRI_IMAGE_FORMAT_GR88:
 860       return MESA_FORMAT_GR88;
 861    case __DRI_IMAGE_FORMAT_SARGB8:
 862       return MESA_FORMAT_SARGB8;
 863    case __DRI_IMAGE_FORMAT_NONE:
 864       return MESA_FORMAT_NONE;
 865    default:
 866       return MESA_FORMAT_NONE;
 867    }
 868 }
 869
 870 /** Image driver interface */
 871 const __DRIimageDriverExtension driImageDriverExtension = {
 872     .base = { __DRI_IMAGE_DRIVER, __DRI_IMAGE_DRIVER_VERSION },
 873
 874     .createNewScreen2           = driCreateNewScreen2,
 875     .createNewDrawable          = driCreateNewDrawable,
 876     .getAPIMask                 = driGetAPIMask,
 877     .createContextAttribs       = driCreateContextAttribs,
 878 };
 879
 880 /* swrast copy sub buffer entrypoint. */
 881 static void driCopySubBuffer(__DRIdrawable *pdp, int x, int y,
 882                              int w, int h)
 883 {
 884     assert(pdp->driScreenPriv->swrast_loader);
 885
 886     pdp->driScreenPriv->driver->CopySubBuffer(pdp, x, y, w, h);
 887 }
 888
 889 /* for swrast only */
 890 const __DRIcopySubBufferExtension driCopySubBufferExtension = {
 891    { __DRI_COPY_SUB_BUFFER, 1 },
 892    .copySubBuffer = driCopySubBuffer,
 893 };