src/glx/dri_common.c

   1 /*
   2  * Copyright 1998-1999 Precision Insight, Inc., Cedar Park, Texas.
   3  * Copyright © 2008 Red Hat, Inc.
   4  *
   5  * Permission is hereby granted, free of charge, to any person obtaining a
   6  * copy of this software and associated documentation files (the "Soft-
   7  * ware"), to deal in the Software without restriction, including without
   8  * limitation the rights to use, copy, modify, merge, publish, distribute,
   9  * and/or sell copies of the Software, and to permit persons to whom the
  10  * Software is furnished to do so, provided that the above copyright
  11  * notice(s) and this permission notice appear in all copies of the Soft-
  12  * ware and that both the above copyright notice(s) and this permission
  13  * notice appear in supporting documentation.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  16  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABIL-
  17  * ITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY
  18  * RIGHTS. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR HOLDERS INCLUDED IN
  19  * THIS NOTICE BE LIABLE FOR ANY CLAIM, OR ANY SPECIAL INDIRECT OR CONSE-
  20  * QUENTIAL DAMAGES, OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
  21  * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
  22  * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFOR-
  23  * MANCE OF THIS SOFTWARE.
  24  *
  25  * Except as contained in this notice, the name of a copyright holder shall
  26  * not be used in advertising or otherwise to promote the sale, use or
  27  * other dealings in this Software without prior written authorization of
  28  * the copyright holder.
  29  *
  30  * Authors:
  31  *   Kevin E. Martin <kevin@precisioninsight.com>
  32  *   Brian Paul <brian@precisioninsight.com>
  33  *   Kristian Høgsberg (krh@redhat.com)
  34  */
  35
  36 #if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
  37
  38 #include <unistd.h>
  39 #include <dlfcn.h>
  40 #include <stdarg.h>
  41 #include "glxclient.h"
  42 #include "dri_common.h"
  43 #include "loader.h"
  44
  45 #ifndef RTLD_NOW
  46 #define RTLD_NOW 0
  47 #endif
  48 #ifndef RTLD_GLOBAL
  49 #define RTLD_GLOBAL 0
  50 #endif
  51
  52 _X_HIDDEN void
  53 dri_message(int level, const char *f, ...)
  54 {
  55    va_list args;
  56    int threshold = _LOADER_WARNING;
  57    const char *libgl_debug;
  58
  59    libgl_debug = getenv("LIBGL_DEBUG");
  60    if (libgl_debug) {
  61       if (strstr(libgl_debug, "quiet"))
  62          threshold = _LOADER_FATAL;
  63       else if (strstr(libgl_debug, "verbose"))
  64          threshold = _LOADER_DEBUG;
  65    }
  66
  67    /* Note that the _LOADER_* levels are lower numbers for more severe. */
  68    if (level <= threshold) {
  69       fprintf(stderr, "libGL%s: ", level <= _LOADER_WARNING ? " error" : "");
  70       va_start(args, f);
  71       vfprintf(stderr, f, args);
  72       va_end(args);
  73    }
  74 }
  75
  76 #ifndef GL_LIB_NAME
  77 #define GL_LIB_NAME "libGL.so.1"
  78 #endif
  79
  80 /**
  81  * Try to \c dlopen the named driver.
  82  *
  83  * This function adds the "_dri.so" suffix to the driver name and searches the
  84  * directories specified by the \c LIBGL_DRIVERS_PATH environment variable in
  85  * order to find the driver.
  86  *
  87  * \param driverName - a name like "i965", "radeon", "nouveau", etc.
  88  *
  89  * \returns
  90  * A handle from \c dlopen, or \c NULL if driver file not found.
  91  */
  92 _X_HIDDEN void *
  93 driOpenDriver(const char *driverName)
  94 {
  95    void *glhandle, *handle;
  96    const char *libPaths, *p, *next;
  97    char realDriverName[200];
  98    int len;
  99
 100    /* Attempt to make sure libGL symbols will be visible to the driver */
 101    glhandle = dlopen(GL_LIB_NAME, RTLD_NOW | RTLD_GLOBAL);
 102
 103    libPaths = NULL;
 104    if (geteuid() == getuid()) {
 105       /* don't allow setuid apps to use LIBGL_DRIVERS_PATH */
 106       libPaths = getenv("LIBGL_DRIVERS_PATH");
 107       if (!libPaths)
 108          libPaths = getenv("LIBGL_DRIVERS_DIR");        /* deprecated */
 109    }
 110    if (libPaths == NULL)
 111       libPaths = DEFAULT_DRIVER_DIR;
 112
 113    handle = NULL;
 114    for (p = libPaths; *p; p = next) {
 115       next = strchr(p, ':');
 116       if (next == NULL) {
 117          len = strlen(p);
 118          next = p + len;
 119       }
 120       else {
 121          len = next - p;
 122          next++;
 123       }
 124
 125 #ifdef GLX_USE_TLS
 126       snprintf(realDriverName, sizeof realDriverName,
 127                "%.*s/tls/%s_dri.so", len, p, driverName);
 128       InfoMessageF("OpenDriver: trying %s\n", realDriverName);
 129       handle = dlopen(realDriverName, RTLD_NOW | RTLD_GLOBAL);
 130 #endif
 131
 132       if (handle == NULL) {
 133          snprintf(realDriverName, sizeof realDriverName,
 134                   "%.*s/%s_dri.so", len, p, driverName);
 135          InfoMessageF("OpenDriver: trying %s\n", realDriverName);
 136          handle = dlopen(realDriverName, RTLD_NOW | RTLD_GLOBAL);
 137       }
 138
 139       if (handle != NULL)
 140          break;
 141       else
 142          InfoMessageF("dlopen %s failed (%s)\n", realDriverName, dlerror());
 143    }
 144
 145    if (!handle)
 146       ErrorMessageF("unable to load driver: %s_dri.so\n", driverName);
 147
 148    if (glhandle)
 149       dlclose(glhandle);
 150
 151    return handle;
 152 }
 153
 154 _X_HIDDEN const __DRIextension **
 155 driGetDriverExtensions(void *handle, const char *driver_name)
 156 {
 157    const __DRIextension **extensions = NULL;
 158    const __DRIextension **(*get_extensions)(void);
 159    char *get_extensions_name = loader_get_extensions_name(driver_name);
 160
 161    if (get_extensions_name) {
 162       get_extensions = dlsym(handle, get_extensions_name);
 163       if (get_extensions) {
 164          free(get_extensions_name);
 165          return get_extensions();
 166       } else {
 167          InfoMessageF("driver does not expose %s(): %s\n",
 168                       get_extensions_name, dlerror());
 169          free(get_extensions_name);
 170       }
 171    }
 172
 173    extensions = dlsym(handle, __DRI_DRIVER_EXTENSIONS);
 174    if (extensions == NULL) {
 175       ErrorMessageF("driver exports no extensions (%s)\n", dlerror());
 176       return NULL;
 177    }
 178
 179    return extensions;
 180 }
 181
 182 static GLboolean
 183 __driGetMSCRate(__DRIdrawable *draw,
 184                 int32_t * numerator, int32_t * denominator,
 185                 void *loaderPrivate)
 186 {
 187    __GLXDRIdrawable *glxDraw = loaderPrivate;
 188
 189    return __glxGetMscRate(glxDraw->psc, numerator, denominator);
 190 }
 191
 192 _X_HIDDEN const __DRIsystemTimeExtension systemTimeExtension = {
 193    .base = {__DRI_SYSTEM_TIME, 1 },
 194
 195    .getUST              = __glXGetUST,
 196    .getMSCRate          = __driGetMSCRate
 197 };
 198
 199 #define __ATTRIB(attrib, field) \
 200     { attrib, offsetof(struct glx_config, field) }
 201
 202 static const struct
 203 {
 204    unsigned int attrib, offset;
 205 } attribMap[] = {
 206    __ATTRIB(__DRI_ATTRIB_BUFFER_SIZE, rgbBits),
 207       __ATTRIB(__DRI_ATTRIB_LEVEL, level),
 208       __ATTRIB(__DRI_ATTRIB_RED_SIZE, redBits),
 209       __ATTRIB(__DRI_ATTRIB_GREEN_SIZE, greenBits),
 210       __ATTRIB(__DRI_ATTRIB_BLUE_SIZE, blueBits),
 211       __ATTRIB(__DRI_ATTRIB_ALPHA_SIZE, alphaBits),
 212       __ATTRIB(__DRI_ATTRIB_DEPTH_SIZE, depthBits),
 213       __ATTRIB(__DRI_ATTRIB_STENCIL_SIZE, stencilBits),
 214       __ATTRIB(__DRI_ATTRIB_ACCUM_RED_SIZE, accumRedBits),
 215       __ATTRIB(__DRI_ATTRIB_ACCUM_GREEN_SIZE, accumGreenBits),
 216       __ATTRIB(__DRI_ATTRIB_ACCUM_BLUE_SIZE, accumBlueBits),
 217       __ATTRIB(__DRI_ATTRIB_ACCUM_ALPHA_SIZE, accumAlphaBits),
 218       __ATTRIB(__DRI_ATTRIB_SAMPLE_BUFFERS, sampleBuffers),
 219       __ATTRIB(__DRI_ATTRIB_SAMPLES, samples),
 220       __ATTRIB(__DRI_ATTRIB_DOUBLE_BUFFER, doubleBufferMode),
 221       __ATTRIB(__DRI_ATTRIB_STEREO, stereoMode),
 222       __ATTRIB(__DRI_ATTRIB_AUX_BUFFERS, numAuxBuffers),
 223 #if 0
 224       __ATTRIB(__DRI_ATTRIB_TRANSPARENT_TYPE, transparentPixel),
 225       __ATTRIB(__DRI_ATTRIB_TRANSPARENT_INDEX_VALUE, transparentIndex),
 226       __ATTRIB(__DRI_ATTRIB_TRANSPARENT_RED_VALUE, transparentRed),
 227       __ATTRIB(__DRI_ATTRIB_TRANSPARENT_GREEN_VALUE, transparentGreen),
 228       __ATTRIB(__DRI_ATTRIB_TRANSPARENT_BLUE_VALUE, transparentBlue),
 229       __ATTRIB(__DRI_ATTRIB_TRANSPARENT_ALPHA_VALUE, transparentAlpha),
 230       __ATTRIB(__DRI_ATTRIB_RED_MASK, redMask),
 231       __ATTRIB(__DRI_ATTRIB_GREEN_MASK, greenMask),
 232       __ATTRIB(__DRI_ATTRIB_BLUE_MASK, blueMask),
 233       __ATTRIB(__DRI_ATTRIB_ALPHA_MASK, alphaMask),
 234 #endif
 235       __ATTRIB(__DRI_ATTRIB_MAX_PBUFFER_WIDTH, maxPbufferWidth),
 236       __ATTRIB(__DRI_ATTRIB_MAX_PBUFFER_HEIGHT, maxPbufferHeight),
 237       __ATTRIB(__DRI_ATTRIB_MAX_PBUFFER_PIXELS, maxPbufferPixels),
 238       __ATTRIB(__DRI_ATTRIB_OPTIMAL_PBUFFER_WIDTH, optimalPbufferWidth),
 239       __ATTRIB(__DRI_ATTRIB_OPTIMAL_PBUFFER_HEIGHT, optimalPbufferHeight),
 240       __ATTRIB(__DRI_ATTRIB_SWAP_METHOD, swapMethod),
 241       __ATTRIB(__DRI_ATTRIB_BIND_TO_TEXTURE_RGB, bindToTextureRgb),
 242       __ATTRIB(__DRI_ATTRIB_BIND_TO_TEXTURE_RGBA, bindToTextureRgba),
 243       __ATTRIB(__DRI_ATTRIB_BIND_TO_MIPMAP_TEXTURE,
 244                      bindToMipmapTexture),
 245       __ATTRIB(__DRI_ATTRIB_YINVERTED, yInverted),
 246       __ATTRIB(__DRI_ATTRIB_FRAMEBUFFER_SRGB_CAPABLE, sRGBCapable)
 247 };
 248
 249 static int
 250 scalarEqual(struct glx_config *mode, unsigned int attrib, unsigned int value)
 251 {
 252    unsigned glxValue, i;
 253
 254    for (i = 0; i < ARRAY_SIZE(attribMap); i++)
 255       if (attribMap[i].attrib == attrib) {
 256          glxValue = *(unsigned int *) ((char *) mode + attribMap[i].offset);
 257          return glxValue == GLX_DONT_CARE || glxValue == value;
 258       }
 259
 260    return GL_TRUE;              /* Is a non-existing attribute equal to value? */
 261 }
 262
 263 static int
 264 driConfigEqual(const __DRIcoreExtension *core,
 265                struct glx_config *config, const __DRIconfig *driConfig)
 266 {
 267    unsigned int attrib, value, glxValue;
 268    int i;
 269
 270    i = 0;
 271    while (core->indexConfigAttrib(driConfig, i++, &attrib, &value)) {
 272       switch (attrib) {
 273       case __DRI_ATTRIB_RENDER_TYPE:
 274          glxValue = 0;
 275          if (value & __DRI_ATTRIB_RGBA_BIT) {
 276             glxValue |= GLX_RGBA_BIT;
 277          }
 278          if (value & __DRI_ATTRIB_COLOR_INDEX_BIT) {
 279             glxValue |= GLX_COLOR_INDEX_BIT;
 280          }
 281          if (value & __DRI_ATTRIB_FLOAT_BIT) {
 282             glxValue |= GLX_RGBA_FLOAT_BIT_ARB;
 283          }
 284          if (value & __DRI_ATTRIB_UNSIGNED_FLOAT_BIT) {
 285             glxValue |= GLX_RGBA_UNSIGNED_FLOAT_BIT_EXT;
 286          }
 287          if (glxValue != config->renderType)
 288             return GL_FALSE;
 289          break;
 290
 291       case __DRI_ATTRIB_CONFIG_CAVEAT:
 292          if (value & __DRI_ATTRIB_NON_CONFORMANT_CONFIG)
 293             glxValue = GLX_NON_CONFORMANT_CONFIG;
 294          else if (value & __DRI_ATTRIB_SLOW_BIT)
 295             glxValue = GLX_SLOW_CONFIG;
 296          else
 297             glxValue = GLX_NONE;
 298          if (glxValue != config->visualRating)
 299             return GL_FALSE;
 300          break;
 301
 302       case __DRI_ATTRIB_BIND_TO_TEXTURE_TARGETS:
 303          glxValue = 0;
 304          if (value & __DRI_ATTRIB_TEXTURE_1D_BIT)
 305             glxValue |= GLX_TEXTURE_1D_BIT_EXT;
 306          if (value & __DRI_ATTRIB_TEXTURE_2D_BIT)
 307             glxValue |= GLX_TEXTURE_2D_BIT_EXT;
 308          if (value & __DRI_ATTRIB_TEXTURE_RECTANGLE_BIT)
 309             glxValue |= GLX_TEXTURE_RECTANGLE_BIT_EXT;
 310          if (config->bindToTextureTargets != GLX_DONT_CARE &&
 311              glxValue != config->bindToTextureTargets)
 312             return GL_FALSE;
 313          break;
 314
 315       case __DRI_ATTRIB_SWAP_METHOD:
 316          if (value == __DRI_ATTRIB_SWAP_EXCHANGE)
 317             glxValue = GLX_SWAP_EXCHANGE_OML;
 318          else if (value == __DRI_ATTRIB_SWAP_COPY)
 319             glxValue = GLX_SWAP_COPY_OML;
 320          else
 321             glxValue = GLX_SWAP_UNDEFINED_OML;
 322
 323          if (!scalarEqual(config, attrib, glxValue))
 324             return GL_FALSE;
 325
 326          break;
 327
 328       default:
 329          if (!scalarEqual(config, attrib, value))
 330             return GL_FALSE;
 331       }
 332    }
 333
 334    return GL_TRUE;
 335 }
 336
 337 static struct glx_config *
 338 createDriMode(const __DRIcoreExtension * core,
 339               struct glx_config *config, const __DRIconfig **driConfigs)
 340 {
 341    __GLXDRIconfigPrivate *driConfig;
 342    int i;
 343
 344    for (i = 0; driConfigs[i]; i++) {
 345       if (driConfigEqual(core, config, driConfigs[i]))
 346          break;
 347    }
 348
 349    if (driConfigs[i] == NULL)
 350       return NULL;
 351
 352    driConfig = malloc(sizeof *driConfig);
 353    if (driConfig == NULL)
 354       return NULL;
 355
 356    driConfig->base = *config;
 357    driConfig->driConfig = driConfigs[i];
 358
 359    return &driConfig->base;
 360 }
 361
 362 _X_HIDDEN struct glx_config *
 363 driConvertConfigs(const __DRIcoreExtension * core,
 364                   struct glx_config *configs, const __DRIconfig **driConfigs)
 365 {
 366    struct glx_config head, *tail, *m;
 367
 368    tail = &head;
 369    head.next = NULL;
 370    for (m = configs; m; m = m->next) {
 371       tail->next = createDriMode(core, m, driConfigs);
 372       if (tail->next == NULL) {
 373          /* no matching dri config for m */
 374          continue;
 375       }
 376
 377
 378       tail = tail->next;
 379    }
 380
 381    return head.next;
 382 }
 383
 384 _X_HIDDEN void
 385 driDestroyConfigs(const __DRIconfig **configs)
 386 {
 387    int i;
 388
 389    for (i = 0; configs[i]; i++)
 390       free((__DRIconfig *) configs[i]);
 391    free(configs);
 392 }
 393
 394 static struct glx_config *
 395 driInferDrawableConfig(struct glx_screen *psc, GLXDrawable draw)
 396 {
 397    unsigned int fbconfig = 0;
 398
 399    if (__glXGetDrawableAttribute(psc->dpy, draw, GLX_FBCONFIG_ID, &fbconfig)) {
 400       return glx_config_find_fbconfig(psc->configs, fbconfig);
 401    }
 402
 403    return NULL;
 404 }
 405
 406 _X_HIDDEN __GLXDRIdrawable *
 407 driFetchDrawable(struct glx_context *gc, GLXDrawable glxDrawable)
 408 {
 409    struct glx_display *const priv = __glXInitialize(gc->psc->dpy);
 410    __GLXDRIdrawable *pdraw;
 411    struct glx_screen *psc;
 412    struct glx_config *config = gc->config;
 413
 414    if (priv == NULL)
 415       return NULL;
 416
 417    if (glxDrawable == None)
 418       return NULL;
 419
 420    psc = priv->screens[gc->screen];
 421    if (priv->drawHash == NULL)
 422       return NULL;
 423
 424    if (__glxHashLookup(priv->drawHash, glxDrawable, (void *) &pdraw) == 0) {
 425       pdraw->refcount ++;
 426       return pdraw;
 427    }
 428
 429    if (config == NULL)
 430       config = driInferDrawableConfig(gc->psc, glxDrawable);
 431    if (config == NULL)
 432       return NULL;
 433
 434    pdraw = psc->driScreen->createDrawable(psc, glxDrawable, glxDrawable,
 435                                           config);
 436
 437    if (pdraw == NULL) {
 438       ErrorMessageF("failed to create drawable\n");
 439       return NULL;
 440    }
 441
 442    if (__glxHashInsert(priv->drawHash, glxDrawable, pdraw)) {
 443       (*pdraw->destroyDrawable) (pdraw);
 444       return NULL;
 445    }
 446    pdraw->refcount = 1;
 447
 448    return pdraw;
 449 }
 450
 451 _X_HIDDEN void
 452 driReleaseDrawables(struct glx_context *gc)
 453 {
 454    const struct glx_display *priv = gc->psc->display;
 455    __GLXDRIdrawable *pdraw;
 456
 457    if (priv == NULL)
 458       return;
 459
 460    if (__glxHashLookup(priv->drawHash,
 461                        gc->currentDrawable, (void *) &pdraw) == 0) {
 462       if (pdraw->drawable == pdraw->xDrawable) {
 463          pdraw->refcount --;
 464          if (pdraw->refcount == 0) {
 465             (*pdraw->destroyDrawable)(pdraw);
 466             __glxHashDelete(priv->drawHash, gc->currentDrawable);
 467          }
 468       }
 469    }
 470
 471    if (__glxHashLookup(priv->drawHash,
 472                        gc->currentReadable, (void *) &pdraw) == 0) {
 473       if (pdraw->drawable == pdraw->xDrawable) {
 474          pdraw->refcount --;
 475          if (pdraw->refcount == 0) {
 476             (*pdraw->destroyDrawable)(pdraw);
 477             __glxHashDelete(priv->drawHash, gc->currentReadable);
 478          }
 479       }
 480    }
 481
 482    gc->currentDrawable = None;
 483    gc->currentReadable = None;
 484
 485 }
 486
 487 _X_HIDDEN bool
 488 dri2_convert_glx_attribs(unsigned num_attribs, const uint32_t *attribs,
 489                          unsigned *major_ver, unsigned *minor_ver,
 490                          uint32_t *render_type, uint32_t *flags, unsigned *api,
 491                          int *reset, int *release, unsigned *error)
 492 {
 493    unsigned i;
 494    bool got_profile = false;
 495    uint32_t profile;
 496
 497    *major_ver = 1;
 498    *minor_ver = 0;
 499    *render_type = GLX_RGBA_TYPE;
 500    *reset = __DRI_CTX_RESET_NO_NOTIFICATION;
 501    *release = __DRI_CTX_RELEASE_BEHAVIOR_FLUSH;
 502    *flags = 0;
 503    *api = __DRI_API_OPENGL;
 504
 505    if (num_attribs == 0) {
 506       return true;
 507    }
 508
 509    /* This is actually an internal error, but what the heck.
 510     */
 511    if (attribs == NULL) {
 512       *error = __DRI_CTX_ERROR_UNKNOWN_ATTRIBUTE;
 513       return false;
 514    }
 515
 516    for (i = 0; i < num_attribs; i++) {
 517       switch (attribs[i * 2]) {
 518       case GLX_CONTEXT_MAJOR_VERSION_ARB:
 519          *major_ver = attribs[i * 2 + 1];
 520          break;
 521       case GLX_CONTEXT_MINOR_VERSION_ARB:
 522          *minor_ver = attribs[i * 2 + 1];
 523          break;
 524       case GLX_CONTEXT_FLAGS_ARB:
 525          *flags = attribs[i * 2 + 1];
 526          break;
 527       case GLX_CONTEXT_PROFILE_MASK_ARB:
 528          profile = attribs[i * 2 + 1];
 529          got_profile = true;
 530          break;
 531       case GLX_RENDER_TYPE:
 532          *render_type = attribs[i * 2 + 1];
 533          break;
 534       case GLX_CONTEXT_RESET_NOTIFICATION_STRATEGY_ARB:
 535          switch (attribs[i * 2 + 1]) {
 536          case GLX_NO_RESET_NOTIFICATION_ARB:
 537             *reset = __DRI_CTX_RESET_NO_NOTIFICATION;
 538             break;
 539          case GLX_LOSE_CONTEXT_ON_RESET_ARB:
 540             *reset = __DRI_CTX_RESET_LOSE_CONTEXT;
 541             break;
 542          default:
 543             *error = __DRI_CTX_ERROR_UNKNOWN_ATTRIBUTE;
 544             return false;
 545          }
 546          break;
 547       case GLX_CONTEXT_RELEASE_BEHAVIOR_ARB:
 548          switch (attribs[i * 2 + 1]) {
 549          case GLX_CONTEXT_RELEASE_BEHAVIOR_NONE_ARB:
 550             *release = __DRI_CTX_RELEASE_BEHAVIOR_NONE;
 551             break;
 552          case GLX_CONTEXT_RELEASE_BEHAVIOR_FLUSH_ARB:
 553             *release = __DRI_CTX_RELEASE_BEHAVIOR_FLUSH;
 554             break;
 555          default:
 556             *error = __DRI_CTX_ERROR_UNKNOWN_ATTRIBUTE;
 557             return false;
 558          }
 559          break;
 560       default:
 561          /* If an unknown attribute is received, fail.
 562           */
 563          *error = __DRI_CTX_ERROR_UNKNOWN_ATTRIBUTE;
 564          return false;
 565       }
 566    }
 567
 568    if (!got_profile) {
 569       if (*major_ver > 3 || (*major_ver == 3 && *minor_ver >= 2))
 570          *api = __DRI_API_OPENGL_CORE;
 571    } else {
 572       switch (profile) {
 573       case GLX_CONTEXT_CORE_PROFILE_BIT_ARB:
 574          /* There are no profiles before OpenGL 3.2.  The
 575           * GLX_ARB_create_context_profile spec says:
 576           *
 577           *     "If the requested OpenGL version is less than 3.2,
 578           *     GLX_CONTEXT_PROFILE_MASK_ARB is ignored and the functionality
 579           *     of the context is determined solely by the requested version."
 580           */
 581          *api = (*major_ver > 3 || (*major_ver == 3 && *minor_ver >= 2))
 582             ? __DRI_API_OPENGL_CORE : __DRI_API_OPENGL;
 583          break;
 584       case GLX_CONTEXT_COMPATIBILITY_PROFILE_BIT_ARB:
 585          *api = __DRI_API_OPENGL;
 586          break;
 587       case GLX_CONTEXT_ES_PROFILE_BIT_EXT:
 588          if (*major_ver >= 3)
 589             *api = __DRI_API_GLES3;
 590          else if (*major_ver == 2 && *minor_ver == 0)
 591             *api = __DRI_API_GLES2;
 592          else if (*major_ver == 1 && *minor_ver < 2)
 593             *api = __DRI_API_GLES;
 594          else {
 595             *error = __DRI_CTX_ERROR_BAD_API;
 596             return false;
 597          }
 598          break;
 599       default:
 600          *error = __DRI_CTX_ERROR_BAD_API;
 601          return false;
 602       }
 603    }
 604
 605    /* Unknown flag value.
 606     */
 607    if (*flags & ~(__DRI_CTX_FLAG_DEBUG | __DRI_CTX_FLAG_FORWARD_COMPATIBLE
 608                   | __DRI_CTX_FLAG_ROBUST_BUFFER_ACCESS)) {
 609       *error = __DRI_CTX_ERROR_UNKNOWN_FLAG;
 610       return false;
 611    }
 612
 613    /* There are no forward-compatible contexts before OpenGL 3.0.  The
 614     * GLX_ARB_create_context spec says:
 615     *
 616     *     "Forward-compatible contexts are defined only for OpenGL versions
 617     *     3.0 and later."
 618     */
 619    if (*major_ver < 3 && (*flags & __DRI_CTX_FLAG_FORWARD_COMPATIBLE) != 0) {
 620       *error = __DRI_CTX_ERROR_BAD_FLAG;
 621       return false;
 622    }
 623
 624    if (*major_ver >= 3 && *render_type == GLX_COLOR_INDEX_TYPE) {
 625       *error = __DRI_CTX_ERROR_BAD_FLAG;
 626       return false;
 627    }
 628
 629    *error = __DRI_CTX_ERROR_SUCCESS;
 630    return true;
 631 }
 632
 633 #endif /* GLX_DIRECT_RENDERING */