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

   1 /*
   2  * (C) Copyright IBM Corporation 2002, 2004
   3  * All Rights Reserved.
   4  *
   5  * Permission is hereby granted, free of charge, to any person obtaining a
   6  * copy of this software and associated documentation files (the "Software"),
   7  * to deal in the Software without restriction, including without limitation
   8  * on the rights to use, copy, modify, merge, publish, distribute, sub
   9  * license, and/or sell copies of the Software, and to permit persons to whom
  10  * the Software is furnished to do so, subject to the following conditions:
  11  *
  12  * The above copyright notice and this permission notice (including the next
  13  * paragraph) shall be included in all copies or substantial portions of the
  14  * Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.  IN NO EVENT SHALL
  19  * THE AUTHORS AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM,
  20  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
  21  * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
  22  * USE OR OTHER DEALINGS IN THE SOFTWARE.
  23  */
  24
  25 /**
  26  * \file dri_util.c
  27  * DRI utility functions.
  28  *
  29  * This module acts as glue between GLX and the actual hardware driver.  A DRI
  30  * driver doesn't really \e have to use any of this - it's optional.  But, some
  31  * useful stuff is done here that otherwise would have to be duplicated in most
  32  * drivers.
  33  *
  34  * Basically, these utility functions take care of some of the dirty details of
  35  * screen initialization, context creation, context binding, DRM setup, etc.
  36  *
  37  * These functions are compiled into each DRI driver so libGL.so knows nothing
  38  * about them.
  39  */
  40
  41
  42 #include <stdbool.h>
  43 #include "dri_util.h"
  44 #include "utils.h"
  45 #include "xmlpool.h"
  46 #include "main/mtypes.h"
  47 #include "main/framebuffer.h"
  48 #include "main/version.h"
  49 #include "main/errors.h"
  50 #include "main/macros.h"
  51
  52 const char __dri2ConfigOptions[] =
  53    DRI_CONF_BEGIN
  54       DRI_CONF_SECTION_PERFORMANCE
  55          DRI_CONF_VBLANK_MODE(DRI_CONF_VBLANK_DEF_INTERVAL_1)
  56       DRI_CONF_SECTION_END
  57    DRI_CONF_END;
  58
  59 /*****************************************************************/
  60 /** \name Screen handling functions                              */
  61 /*****************************************************************/
  62 /*@{*/
  63
  64 static void
  65 setupLoaderExtensions(__DRIscreen *psp,
  66                       const __DRIextension **extensions)
  67 {
  68     int i;
  69
  70     for (i = 0; extensions[i]; i++) {
  71         if (strcmp(extensions[i]->name, __DRI_DRI2_LOADER) == 0)
  72             psp->dri2.loader = (__DRIdri2LoaderExtension *) extensions[i];
  73         if (strcmp(extensions[i]->name, __DRI_IMAGE_LOOKUP) == 0)
  74             psp->dri2.image = (__DRIimageLookupExtension *) extensions[i];
  75         if (strcmp(extensions[i]->name, __DRI_USE_INVALIDATE) == 0)
  76             psp->dri2.useInvalidate = (__DRIuseInvalidateExtension *) extensions[i];
  77         if (strcmp(extensions[i]->name, __DRI_SWRAST_LOADER) == 0)
  78             psp->swrast_loader = (__DRIswrastLoaderExtension *) extensions[i];
  79         if (strcmp(extensions[i]->name, __DRI_IMAGE_LOADER) == 0)
  80            psp->image.loader = (__DRIimageLoaderExtension *) extensions[i];
  81     }
  82 }
  83
  84 /**
  85  * This pointer determines which driver API we'll use in the case of the
  86  * loader not passing us an explicit driver extensions list (that would,
  87  * itself, contain a pointer to a driver API.)
  88  *
  89  * A driver's driDriverGetExtensions_drivername() can update this pointer to
  90  * what it's returning, and a loader that is ignorant of createNewScreen2()
  91  * will get the correct driver screen created, as long as no other
  92  * driDriverGetExtensions() happened in between the first one and the
  93  * createNewScreen().
  94  *
  95  * This allows the X Server to not require the significant dri_interface.h
  96  * updates for doing createNewScreen2(), which would discourage backporting of
  97  * the X Server patches to support the new loader interface.
  98  */
  99 const struct __DriverAPIRec *globalDriverAPI = &driDriverAPI;
 100
 101 /**
 102  * This is the first entrypoint in the driver called by the DRI driver loader
 103  * after dlopen()ing it.
 104  *
 105  * It's used to create global state for the driver across contexts on the same
 106  * Display.
 107  */
 108 static __DRIscreen *
 109 driCreateNewScreen2(int scrn, int fd,
 110                     const __DRIextension **extensions,
 111                     const __DRIextension **driver_extensions,
 112                     const __DRIconfig ***driver_configs, void *data)
 113 {
 114     static const __DRIextension *emptyExtensionList[] = { NULL };
 115     __DRIscreen *psp;
 116
 117     psp = calloc(1, sizeof(*psp));
 118     if (!psp)
 119         return NULL;
 120
 121     /* By default, use the global driDriverAPI symbol (non-megadrivers). */
 122     psp->driver = globalDriverAPI;
 123
 124     /* If the driver exposes its vtable through its extensions list
 125      * (megadrivers), use that instead.
 126      */
 127     if (driver_extensions) {
 128        for (int i = 0; driver_extensions[i]; i++) {
 129           if (strcmp(driver_extensions[i]->name, __DRI_DRIVER_VTABLE) == 0) {
 130              psp->driver =
 131                 ((__DRIDriverVtableExtension *)driver_extensions[i])->vtable;
 132           }
 133        }
 134     }
 135
 136     setupLoaderExtensions(psp, extensions);
 137
 138     psp->loaderPrivate = data;
 139
 140     psp->extensions = emptyExtensionList;
 141     psp->fd = fd;
 142     psp->myNum = scrn;
 143
 144     *driver_configs = psp->driver->InitScreen(psp);
 145     if (*driver_configs == NULL) {
 146         free(psp);
 147         return NULL;
 148     }
 149
 150     struct gl_constants consts = { 0 };
 151     gl_api api;
 152     unsigned version;
 153
 154     api = API_OPENGLES2;
 155     if (_mesa_override_gl_version_contextless(&consts, &api, &version))
 156        psp->max_gl_es2_version = version;
 157
 158     api = API_OPENGL_COMPAT;
 159     if (_mesa_override_gl_version_contextless(&consts, &api, &version)) {
 160        if (api == API_OPENGL_CORE) {
 161           psp->max_gl_core_version = version;
 162        } else {
 163           psp->max_gl_compat_version = version;
 164        }
 165     }
 166
 167     psp->api_mask = 0;
 168     if (psp->max_gl_compat_version > 0)
 169        psp->api_mask |= (1 << __DRI_API_OPENGL);
 170     if (psp->max_gl_core_version > 0)
 171        psp->api_mask |= (1 << __DRI_API_OPENGL_CORE);
 172     if (psp->max_gl_es1_version > 0)
 173        psp->api_mask |= (1 << __DRI_API_GLES);
 174     if (psp->max_gl_es2_version > 0)
 175        psp->api_mask |= (1 << __DRI_API_GLES2);
 176     if (psp->max_gl_es2_version >= 30)
 177        psp->api_mask |= (1 << __DRI_API_GLES3);
 178
 179     driParseOptionInfo(&psp->optionInfo, __dri2ConfigOptions);
 180     driParseConfigFiles(&psp->optionCache, &psp->optionInfo, psp->myNum, "dri2");
 181
 182
 183     return psp;
 184 }
 185
 186 static __DRIscreen *
 187 dri2CreateNewScreen(int scrn, int fd,
 188                     const __DRIextension **extensions,
 189                     const __DRIconfig ***driver_configs, void *data)
 190 {
 191    return driCreateNewScreen2(scrn, fd, extensions, NULL,
 192                                driver_configs, data);
 193 }
 194
 195 /** swrast driver createNewScreen entrypoint. */
 196 static __DRIscreen *
 197 driSWRastCreateNewScreen(int scrn, const __DRIextension **extensions,
 198                          const __DRIconfig ***driver_configs, void *data)
 199 {
 200    return driCreateNewScreen2(scrn, -1, extensions, NULL,
 201                                driver_configs, data);
 202 }
 203
 204 static __DRIscreen *
 205 driSWRastCreateNewScreen2(int scrn, const __DRIextension **extensions,
 206                           const __DRIextension **driver_extensions,
 207                           const __DRIconfig ***driver_configs, void *data)
 208 {
 209    return driCreateNewScreen2(scrn, -1, extensions, driver_extensions,
 210                                driver_configs, data);
 211 }
 212
 213 /**
 214  * Destroy the per-screen private information.
 215  *
 216  * \internal
 217  * This function calls __DriverAPIRec::DestroyScreen on \p screenPrivate, calls
 218  * drmClose(), and finally frees \p screenPrivate.
 219  */
 220 static void driDestroyScreen(__DRIscreen *psp)
 221 {
 222     if (psp) {
 223         /* No interaction with the X-server is possible at this point.  This
 224          * routine is called after XCloseDisplay, so there is no protocol
 225          * stream open to the X-server anymore.
 226          */
 227
 228         psp->driver->DestroyScreen(psp);
 229
 230         driDestroyOptionCache(&psp->optionCache);
 231         driDestroyOptionInfo(&psp->optionInfo);
 232
 233         free(psp);
 234     }
 235 }
 236
 237 static const __DRIextension **driGetExtensions(__DRIscreen *psp)
 238 {
 239     return psp->extensions;
 240 }
 241
 242 /*@}*/
 243
 244
 245 static bool
 246 validate_context_version(__DRIscreen *screen,
 247                          int mesa_api,
 248                          unsigned major_version,
 249                          unsigned minor_version,
 250                          unsigned *dri_ctx_error)
 251 {
 252    unsigned req_version = 10 * major_version + minor_version;
 253    unsigned max_version = 0;
 254
 255    switch (mesa_api) {
 256    case API_OPENGL_COMPAT:
 257       max_version = screen->max_gl_compat_version;
 258       break;
 259    case API_OPENGL_CORE:
 260       max_version = screen->max_gl_core_version;
 261       break;
 262    case API_OPENGLES:
 263       max_version = screen->max_gl_es1_version;
 264       break;
 265    case API_OPENGLES2:
 266       max_version = screen->max_gl_es2_version;
 267       break;
 268    default:
 269       max_version = 0;
 270       break;
 271    }
 272
 273    if (max_version == 0) {
 274       *dri_ctx_error = __DRI_CTX_ERROR_BAD_API;
 275       return false;
 276    } else if (req_version > max_version) {
 277       *dri_ctx_error = __DRI_CTX_ERROR_BAD_VERSION;
 278       return false;
 279    }
 280
 281    return true;
 282 }
 283
 284 /*****************************************************************/
 285 /** \name Context handling functions                             */
 286 /*****************************************************************/
 287 /*@{*/
 288
 289 static __DRIcontext *
 290 driCreateContextAttribs(__DRIscreen *screen, int api,
 291                         const __DRIconfig *config,
 292                         __DRIcontext *shared,
 293                         unsigned num_attribs,
 294                         const uint32_t *attribs,
 295                         unsigned *error,
 296                         void *data)
 297 {
 298     __DRIcontext *context;
 299     const struct gl_config *modes = (config != NULL) ? &config->modes : NULL;
 300     void *shareCtx = (shared != NULL) ? shared->driverPrivate : NULL;
 301     gl_api mesa_api;
 302     unsigned major_version = 1;
 303     unsigned minor_version = 0;
 304     uint32_t flags = 0;
 305     bool notify_reset = false;
 306
 307     assert((num_attribs == 0) || (attribs != NULL));
 308
 309     if (!(screen->api_mask & (1 << api))) {
 310         *error = __DRI_CTX_ERROR_BAD_API;
 311         return NULL;
 312     }
 313
 314     switch (api) {
 315     case __DRI_API_OPENGL:
 316         mesa_api = API_OPENGL_COMPAT;
 317         break;
 318     case __DRI_API_GLES:
 319         mesa_api = API_OPENGLES;
 320         break;
 321     case __DRI_API_GLES2:
 322     case __DRI_API_GLES3:
 323         mesa_api = API_OPENGLES2;
 324         break;
 325     case __DRI_API_OPENGL_CORE:
 326         mesa_api = API_OPENGL_CORE;
 327         break;
 328     default:
 329         *error = __DRI_CTX_ERROR_BAD_API;
 330         return NULL;
 331     }
 332
 333     for (unsigned i = 0; i < num_attribs; i++) {
 334         switch (attribs[i * 2]) {
 335         case __DRI_CTX_ATTRIB_MAJOR_VERSION:
 336             major_version = attribs[i * 2 + 1];
 337             break;
 338         case __DRI_CTX_ATTRIB_MINOR_VERSION:
 339             minor_version = attribs[i * 2 + 1];
 340             break;
 341         case __DRI_CTX_ATTRIB_FLAGS:
 342             flags = attribs[i * 2 + 1];
 343             break;
 344         case __DRI_CTX_ATTRIB_RESET_STRATEGY:
 345             notify_reset = (attribs[i * 2 + 1]
 346                             != __DRI_CTX_RESET_NO_NOTIFICATION);
 347             break;
 348         default:
 349             /* We can't create a context that satisfies the requirements of an
 350              * attribute that we don't understand.  Return failure.
 351              */
 352             assert(!"Should not get here.");
 353             *error = __DRI_CTX_ERROR_UNKNOWN_ATTRIBUTE;
 354             return NULL;
 355         }
 356     }
 357
 358     /* Mesa does not support the GL_ARB_compatibilty extension or the
 359      * compatibility profile.  This means that we treat a API_OPENGL_COMPAT 3.1 as
 360      * API_OPENGL_CORE and reject API_OPENGL_COMPAT 3.2+.
 361      */
 362     if (mesa_api == API_OPENGL_COMPAT && major_version == 3 && minor_version == 1)
 363        mesa_api = API_OPENGL_CORE;
 364
 365     if (mesa_api == API_OPENGL_COMPAT
 366         && ((major_version > 3)
 367             || (major_version == 3 && minor_version >= 2))) {
 368        *error = __DRI_CTX_ERROR_BAD_API;
 369        return NULL;
 370     }
 371
 372     /* The latest version of EGL_KHR_create_context spec says:
 373      *
 374      *     "If the EGL_CONTEXT_OPENGL_DEBUG_BIT_KHR flag bit is set in
 375      *     EGL_CONTEXT_FLAGS_KHR, then a <debug context> will be created.
 376      *     [...] This bit is supported for OpenGL and OpenGL ES contexts.
 377      *
 378      * None of the other flags have any meaning in an ES context, so this seems safe.
 379      */
 380     if (mesa_api != API_OPENGL_COMPAT
 381         && mesa_api != API_OPENGL_CORE
 382         && (flags & ~__DRI_CTX_FLAG_DEBUG)) {
 383         *error = __DRI_CTX_ERROR_BAD_FLAG;
 384         return NULL;
 385     }
 386
 387     /* There are no forward-compatible contexts before OpenGL 3.0.  The
 388      * GLX_ARB_create_context spec says:
 389      *
 390      *     "Forward-compatible contexts are defined only for OpenGL versions
 391      *     3.0 and later."
 392      *
 393      * Forward-looking contexts are supported by silently converting the
 394      * requested API to API_OPENGL_CORE.
 395      *
 396      * In Mesa, a debug context is the same as a regular context.
 397      */
 398     if ((flags & __DRI_CTX_FLAG_FORWARD_COMPATIBLE) != 0) {
 399        mesa_api = API_OPENGL_CORE;
 400     }
 401
 402     const uint32_t allowed_flags = (__DRI_CTX_FLAG_DEBUG
 403                                     | __DRI_CTX_FLAG_FORWARD_COMPATIBLE
 404                                     | __DRI_CTX_FLAG_ROBUST_BUFFER_ACCESS);
 405     if (flags & ~allowed_flags) {
 406         *error = __DRI_CTX_ERROR_UNKNOWN_FLAG;
 407         return NULL;
 408     }
 409
 410     if (!validate_context_version(screen, mesa_api,
 411                                   major_version, minor_version, error))
 412        return NULL;
 413
 414     context = calloc(1, sizeof *context);
 415     if (!context) {
 416         *error = __DRI_CTX_ERROR_NO_MEMORY;
 417         return NULL;
 418     }
 419
 420     context->loaderPrivate = data;
 421
 422     context->driScreenPriv = screen;
 423     context->driDrawablePriv = NULL;
 424     context->driReadablePriv = NULL;
 425
 426     if (!screen->driver->CreateContext(mesa_api, modes, context,
 427                                        major_version, minor_version,
 428                                        flags, notify_reset, error, shareCtx)) {
 429         free(context);
 430         return NULL;
 431     }
 432
 433     *error = __DRI_CTX_ERROR_SUCCESS;
 434     return context;
 435 }
 436
 437 void
 438 driContextSetFlags(struct gl_context *ctx, uint32_t flags)
 439 {
 440     if ((flags & __DRI_CTX_FLAG_FORWARD_COMPATIBLE) != 0)
 441         ctx->Const.ContextFlags |= GL_CONTEXT_FLAG_FORWARD_COMPATIBLE_BIT;
 442     if ((flags & __DRI_CTX_FLAG_DEBUG) != 0) {
 443        _mesa_set_debug_state_int(ctx, GL_DEBUG_OUTPUT, GL_TRUE);
 444         ctx->Const.ContextFlags |= GL_CONTEXT_FLAG_DEBUG_BIT;
 445     }
 446 }
 447
 448 static __DRIcontext *
 449 driCreateNewContextForAPI(__DRIscreen *screen, int api,
 450                           const __DRIconfig *config,
 451                           __DRIcontext *shared, void *data)
 452 {
 453     unsigned error;
 454
 455     return driCreateContextAttribs(screen, api, config, shared, 0, NULL,
 456                                    &error, data);
 457 }
 458
 459 static __DRIcontext *
 460 driCreateNewContext(__DRIscreen *screen, const __DRIconfig *config,
 461                     __DRIcontext *shared, void *data)
 462 {
 463     return driCreateNewContextForAPI(screen, __DRI_API_OPENGL,
 464                                      config, shared, data);
 465 }
 466
 467 /**
 468  * Destroy the per-context private information.
 469  *
 470  * \internal
 471  * This function calls __DriverAPIRec::DestroyContext on \p contextPrivate, calls
 472  * drmDestroyContext(), and finally frees \p contextPrivate.
 473  */
 474 static void
 475 driDestroyContext(__DRIcontext *pcp)
 476 {
 477     if (pcp) {
 478         pcp->driScreenPriv->driver->DestroyContext(pcp);
 479         free(pcp);
 480     }
 481 }
 482
 483 static int
 484 driCopyContext(__DRIcontext *dest, __DRIcontext *src, unsigned long mask)
 485 {
 486     (void) dest;
 487     (void) src;
 488     (void) mask;
 489     return GL_FALSE;
 490 }
 491
 492 /*@}*/
 493
 494
 495 /*****************************************************************/
 496 /** \name Context (un)binding functions                          */
 497 /*****************************************************************/
 498 /*@{*/
 499
 500 static void dri_get_drawable(__DRIdrawable *pdp);
 501 static void dri_put_drawable(__DRIdrawable *pdp);
 502
 503 /**
 504  * This function takes both a read buffer and a draw buffer.  This is needed
 505  * for \c glXMakeCurrentReadSGI or GLX 1.3's \c glXMakeContextCurrent
 506  * function.
 507  */
 508 static int driBindContext(__DRIcontext *pcp,
 509                           __DRIdrawable *pdp,
 510                           __DRIdrawable *prp)
 511 {
 512     /*
 513     ** Assume error checking is done properly in glXMakeCurrent before
 514     ** calling driUnbindContext.
 515     */
 516
 517     if (!pcp)
 518         return GL_FALSE;
 519
 520     /* Bind the drawable to the context */
 521     pcp->driDrawablePriv = pdp;
 522     pcp->driReadablePriv = prp;
 523     if (pdp) {
 524         pdp->driContextPriv = pcp;
 525         dri_get_drawable(pdp);
 526     }
 527     if (prp && pdp != prp) {
 528         dri_get_drawable(prp);
 529     }
 530
 531     return pcp->driScreenPriv->driver->MakeCurrent(pcp, pdp, prp);
 532 }
 533
 534 /**
 535  * Unbind context.
 536  *
 537  * \param scrn the screen.
 538  * \param gc context.
 539  *
 540  * \return \c GL_TRUE on success, or \c GL_FALSE on failure.
 541  *
 542  * \internal
 543  * This function calls __DriverAPIRec::UnbindContext, and then decrements
 544  * __DRIdrawableRec::refcount which must be non-zero for a successful
 545  * return.
 546  *
 547  * While casting the opaque private pointers associated with the parameters
 548  * into their respective real types it also assures they are not \c NULL.
 549  */
 550 static int driUnbindContext(__DRIcontext *pcp)
 551 {
 552     __DRIdrawable *pdp;
 553     __DRIdrawable *prp;
 554
 555     /*
 556     ** Assume error checking is done properly in glXMakeCurrent before
 557     ** calling driUnbindContext.
 558     */
 559
 560     if (pcp == NULL)
 561         return GL_FALSE;
 562
 563     /*
 564     ** Call driUnbindContext before checking for valid drawables
 565     ** to handle surfaceless contexts properly.
 566     */
 567     pcp->driScreenPriv->driver->UnbindContext(pcp);
 568
 569     pdp = pcp->driDrawablePriv;
 570     prp = pcp->driReadablePriv;
 571
 572     /* already unbound */
 573     if (!pdp && !prp)
 574         return GL_TRUE;
 575
 576     assert(pdp);
 577     if (pdp->refcount == 0) {
 578         /* ERROR!!! */
 579         return GL_FALSE;
 580     }
 581
 582     dri_put_drawable(pdp);
 583
 584     if (prp != pdp) {
 585         if (prp->refcount == 0) {
 586             /* ERROR!!! */
 587             return GL_FALSE;
 588         }
 589
 590         dri_put_drawable(prp);
 591     }
 592
 593     pcp->driDrawablePriv = NULL;
 594     pcp->driReadablePriv = NULL;
 595
 596     return GL_TRUE;
 597 }
 598
 599 /*@}*/
 600
 601
 602 static void dri_get_drawable(__DRIdrawable *pdp)
 603 {
 604     pdp->refcount++;
 605 }
 606
 607 static void dri_put_drawable(__DRIdrawable *pdp)
 608 {
 609     if (pdp) {
 610         pdp->refcount--;
 611         if (pdp->refcount)
 612             return;
 613
 614         pdp->driScreenPriv->driver->DestroyBuffer(pdp);
 615         free(pdp);
 616     }
 617 }
 618
 619 static __DRIdrawable *
 620 driCreateNewDrawable(__DRIscreen *screen,
 621                      const __DRIconfig *config,
 622                      void *data)
 623 {
 624     __DRIdrawable *pdraw;
 625
 626     pdraw = malloc(sizeof *pdraw);
 627     if (!pdraw)
 628         return NULL;
 629
 630     pdraw->loaderPrivate = data;
 631
 632     pdraw->driScreenPriv = screen;
 633     pdraw->driContextPriv = NULL;
 634     pdraw->refcount = 0;
 635     pdraw->lastStamp = 0;
 636     pdraw->w = 0;
 637     pdraw->h = 0;
 638
 639     dri_get_drawable(pdraw);
 640
 641     if (!screen->driver->CreateBuffer(screen, pdraw, &config->modes,
 642                                       GL_FALSE)) {
 643        free(pdraw);
 644        return NULL;
 645     }
 646
 647     pdraw->dri2.stamp = pdraw->lastStamp + 1;
 648
 649     return pdraw;
 650 }
 651
 652 static void
 653 driDestroyDrawable(__DRIdrawable *pdp)
 654 {
 655     dri_put_drawable(pdp);
 656 }
 657
 658 static __DRIbuffer *
 659 dri2AllocateBuffer(__DRIscreen *screen,
 660                    unsigned int attachment, unsigned int format,
 661                    int width, int height)
 662 {
 663     return screen->driver->AllocateBuffer(screen, attachment, format,
 664                                           width, height);
 665 }
 666
 667 static void
 668 dri2ReleaseBuffer(__DRIscreen *screen, __DRIbuffer *buffer)
 669 {
 670     screen->driver->ReleaseBuffer(screen, buffer);
 671 }
 672
 673
 674 static int
 675 dri2ConfigQueryb(__DRIscreen *screen, const char *var, unsigned char *val)
 676 {
 677    if (!driCheckOption(&screen->optionCache, var, DRI_BOOL))
 678       return -1;
 679
 680    *val = driQueryOptionb(&screen->optionCache, var);
 681
 682    return 0;
 683 }
 684
 685 static int
 686 dri2ConfigQueryi(__DRIscreen *screen, const char *var, int *val)
 687 {
 688    if (!driCheckOption(&screen->optionCache, var, DRI_INT) &&
 689        !driCheckOption(&screen->optionCache, var, DRI_ENUM))
 690       return -1;
 691
 692     *val = driQueryOptioni(&screen->optionCache, var);
 693
 694     return 0;
 695 }
 696
 697 static int
 698 dri2ConfigQueryf(__DRIscreen *screen, const char *var, float *val)
 699 {
 700    if (!driCheckOption(&screen->optionCache, var, DRI_FLOAT))
 701       return -1;
 702
 703     *val = driQueryOptionf(&screen->optionCache, var);
 704
 705     return 0;
 706 }
 707
 708 static unsigned int
 709 driGetAPIMask(__DRIscreen *screen)
 710 {
 711     return screen->api_mask;
 712 }
 713
 714 /**
 715  * swrast swapbuffers entrypoint.
 716  *
 717  * DRI2 implements this inside the loader with only flushes handled by the
 718  * driver.
 719  */
 720 static void
 721 driSwapBuffers(__DRIdrawable *pdp)
 722 {
 723     assert(pdp->driScreenPriv->swrast_loader);
 724
 725     pdp->driScreenPriv->driver->SwapBuffers(pdp);
 726 }
 727
 728 /** Core interface */
 729 const __DRIcoreExtension driCoreExtension = {
 730     .base = { __DRI_CORE, 1 },
 731
 732     .createNewScreen            = NULL,
 733     .destroyScreen              = driDestroyScreen,
 734     .getExtensions              = driGetExtensions,
 735     .getConfigAttrib            = driGetConfigAttrib,
 736     .indexConfigAttrib          = driIndexConfigAttrib,
 737     .createNewDrawable          = NULL,
 738     .destroyDrawable            = driDestroyDrawable,
 739     .swapBuffers                = driSwapBuffers, /* swrast */
 740     .createNewContext           = driCreateNewContext, /* swrast */
 741     .copyContext                = driCopyContext,
 742     .destroyContext             = driDestroyContext,
 743     .bindContext                = driBindContext,
 744     .unbindContext              = driUnbindContext
 745 };
 746
 747 /** DRI2 interface */
 748 const __DRIdri2Extension driDRI2Extension = {
 749     .base = { __DRI_DRI2, 4 },
 750
 751     .createNewScreen            = dri2CreateNewScreen,
 752     .createNewDrawable          = driCreateNewDrawable,
 753     .createNewContext           = driCreateNewContext,
 754     .getAPIMask                 = driGetAPIMask,
 755     .createNewContextForAPI     = driCreateNewContextForAPI,
 756     .allocateBuffer             = dri2AllocateBuffer,
 757     .releaseBuffer              = dri2ReleaseBuffer,
 758     .createContextAttribs       = driCreateContextAttribs,
 759     .createNewScreen2           = driCreateNewScreen2,
 760 };
 761
 762 const __DRIswrastExtension driSWRastExtension = {
 763     .base = { __DRI_SWRAST, 4 },
 764
 765     .createNewScreen            = driSWRastCreateNewScreen,
 766     .createNewDrawable          = driCreateNewDrawable,
 767     .createNewContextForAPI     = driCreateNewContextForAPI,
 768     .createContextAttribs       = driCreateContextAttribs,
 769     .createNewScreen2           = driSWRastCreateNewScreen2,
 770 };
 771
 772 const __DRI2configQueryExtension dri2ConfigQueryExtension = {
 773    .base = { __DRI2_CONFIG_QUERY, 1 },
 774
 775    .configQueryb        = dri2ConfigQueryb,
 776    .configQueryi        = dri2ConfigQueryi,
 777    .configQueryf        = dri2ConfigQueryf,
 778 };
 779
 780 void
 781 dri2InvalidateDrawable(__DRIdrawable *drawable)
 782 {
 783     drawable->dri2.stamp++;
 784 }
 785
 786 /**
 787  * Check that the gl_framebuffer associated with dPriv is the right size.
 788  * Resize the gl_framebuffer if needed.
 789  * It's expected that the dPriv->driverPrivate member points to a
 790  * gl_framebuffer object.
 791  */
 792 void
 793 driUpdateFramebufferSize(struct gl_context *ctx, const __DRIdrawable *dPriv)
 794 {
 795    struct gl_framebuffer *fb = (struct gl_framebuffer *) dPriv->driverPrivate;
 796    if (fb && (dPriv->w != fb->Width || dPriv->h != fb->Height)) {
 797       _mesa_resize_framebuffer(ctx, fb, dPriv->w, dPriv->h);
 798       /* if the driver needs the hw lock for ResizeBuffers, the drawable
 799          might have changed again by now */
 800       assert(fb->Width == dPriv->w);
 801       assert(fb->Height == dPriv->h);
 802    }
 803 }
 804
 805 uint32_t
 806 driGLFormatToImageFormat(mesa_format format)
 807 {
 808    switch (format) {
 809    case MESA_FORMAT_B5G6R5_UNORM:
 810       return __DRI_IMAGE_FORMAT_RGB565;
 811    case MESA_FORMAT_B8G8R8X8_UNORM:
 812       return __DRI_IMAGE_FORMAT_XRGB8888;
 813    case MESA_FORMAT_B10G10R10A2_UNORM:
 814       return __DRI_IMAGE_FORMAT_ARGB2101010;
 815    case MESA_FORMAT_B10G10R10X2_UNORM:
 816       return __DRI_IMAGE_FORMAT_XRGB2101010;
 817    case MESA_FORMAT_B8G8R8A8_UNORM:
 818       return __DRI_IMAGE_FORMAT_ARGB8888;
 819    case MESA_FORMAT_R8G8B8A8_UNORM:
 820       return __DRI_IMAGE_FORMAT_ABGR8888;
 821    case MESA_FORMAT_R8G8B8X8_UNORM:
 822       return __DRI_IMAGE_FORMAT_XBGR8888;
 823    case MESA_FORMAT_R_UNORM8:
 824       return __DRI_IMAGE_FORMAT_R8;
 825    case MESA_FORMAT_R8G8_UNORM:
 826       return __DRI_IMAGE_FORMAT_GR88;
 827    case MESA_FORMAT_NONE:
 828       return __DRI_IMAGE_FORMAT_NONE;
 829    case MESA_FORMAT_B8G8R8A8_SRGB:
 830       return __DRI_IMAGE_FORMAT_SARGB8;
 831    default:
 832       return 0;
 833    }
 834 }
 835
 836 mesa_format
 837 driImageFormatToGLFormat(uint32_t image_format)
 838 {
 839    switch (image_format) {
 840    case __DRI_IMAGE_FORMAT_RGB565:
 841       return MESA_FORMAT_B5G6R5_UNORM;
 842    case __DRI_IMAGE_FORMAT_XRGB8888:
 843       return MESA_FORMAT_B8G8R8X8_UNORM;
 844    case __DRI_IMAGE_FORMAT_ARGB2101010:
 845       return MESA_FORMAT_B10G10R10A2_UNORM;
 846    case __DRI_IMAGE_FORMAT_XRGB2101010:
 847       return MESA_FORMAT_B10G10R10X2_UNORM;
 848    case __DRI_IMAGE_FORMAT_ARGB8888:
 849       return MESA_FORMAT_B8G8R8A8_UNORM;
 850    case __DRI_IMAGE_FORMAT_ABGR8888:
 851       return MESA_FORMAT_R8G8B8A8_UNORM;
 852    case __DRI_IMAGE_FORMAT_XBGR8888:
 853       return MESA_FORMAT_R8G8B8X8_UNORM;
 854    case __DRI_IMAGE_FORMAT_R8:
 855       return MESA_FORMAT_R_UNORM8;
 856    case __DRI_IMAGE_FORMAT_GR88:
 857       return MESA_FORMAT_R8G8_UNORM;
 858    case __DRI_IMAGE_FORMAT_SARGB8:
 859       return MESA_FORMAT_B8G8R8A8_SRGB;
 860    case __DRI_IMAGE_FORMAT_NONE:
 861       return MESA_FORMAT_NONE;
 862    default:
 863       return MESA_FORMAT_NONE;
 864    }
 865 }
 866
 867 /** Image driver interface */
 868 const __DRIimageDriverExtension driImageDriverExtension = {
 869     .base = { __DRI_IMAGE_DRIVER, 1 },
 870
 871     .createNewScreen2           = driCreateNewScreen2,
 872     .createNewDrawable          = driCreateNewDrawable,
 873     .getAPIMask                 = driGetAPIMask,
 874     .createContextAttribs       = driCreateContextAttribs,
 875 };
 876
 877 /* swrast copy sub buffer entrypoint. */
 878 static void driCopySubBuffer(__DRIdrawable *pdp, int x, int y,
 879                              int w, int h)
 880 {
 881     assert(pdp->driScreenPriv->swrast_loader);
 882
 883     pdp->driScreenPriv->driver->CopySubBuffer(pdp, x, y, w, h);
 884 }
 885
 886 /* for swrast only */
 887 const __DRIcopySubBufferExtension driCopySubBufferExtension = {
 888    .base = { __DRI_COPY_SUB_BUFFER, 1 },
 889
 890    .copySubBuffer               = driCopySubBuffer,
 891 };