dri_common.c revision 848b8605 
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
53dri_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 DEFAULT_DRIVER_DIR
77/* this is normally defined in Mesa/configs/default with DRI_DRIVER_SEARCH_PATH */
78#define DEFAULT_DRIVER_DIR "/usr/local/lib/dri"
79#endif
80
81/**
82 * Try to \c dlopen the named driver.
83 *
84 * This function adds the "_dri.so" suffix to the driver name and searches the
85 * directories specified by the \c LIBGL_DRIVERS_PATH environment variable in
86 * order to find the driver.
87 *
88 * \param driverName - a name like "i965", "radeon", "nouveau", etc.
89 *
90 * \returns
91 * A handle from \c dlopen, or \c NULL if driver file not found.
92 */
93_X_HIDDEN void *
94driOpenDriver(const char *driverName)
95{
96   void *glhandle, *handle;
97   const char *libPaths, *p, *next;
98   char realDriverName[200];
99   int len;
100
101   /* Attempt to make sure libGL symbols will be visible to the driver */
102#ifdef __NetBSD__ // base only, pkgsrc didn't get bumped for time_t
103   glhandle = dlopen("libGL.so.2", RTLD_NOW | RTLD_GLOBAL);
104#else
105   glhandle = dlopen("libGL.so.1", RTLD_NOW | RTLD_GLOBAL);
106#endif
107
108   libPaths = NULL;
109   if (geteuid() == getuid()) {
110      /* don't allow setuid apps to use LIBGL_DRIVERS_PATH */
111      libPaths = getenv("LIBGL_DRIVERS_PATH");
112      if (!libPaths)
113         libPaths = getenv("LIBGL_DRIVERS_DIR");        /* deprecated */
114   }
115   if (libPaths == NULL)
116      libPaths = DEFAULT_DRIVER_DIR;
117
118   handle = NULL;
119   for (p = libPaths; *p; p = next) {
120      next = strchr(p, ':');
121      if (next == NULL) {
122         len = strlen(p);
123         next = p + len;
124      }
125      else {
126         len = next - p;
127         next++;
128      }
129
130#ifdef GLX_USE_TLS
131      snprintf(realDriverName, sizeof realDriverName,
132               "%.*s/tls/%s_dri.so", len, p, driverName);
133      InfoMessageF("OpenDriver: trying %s\n", realDriverName);
134      handle = dlopen(realDriverName, RTLD_NOW | RTLD_GLOBAL);
135#endif
136
137      if (handle == NULL) {
138         snprintf(realDriverName, sizeof realDriverName,
139                  "%.*s/%s_dri.so", len, p, driverName);
140         InfoMessageF("OpenDriver: trying %s\n", realDriverName);
141         handle = dlopen(realDriverName, RTLD_NOW | RTLD_GLOBAL);
142      }
143
144      if (handle != NULL)
145         break;
146      else
147         InfoMessageF("dlopen %s failed (%s)\n", realDriverName, dlerror());
148   }
149
150   if (!handle)
151      ErrorMessageF("unable to load driver: %s_dri.so\n", driverName);
152
153   if (glhandle)
154      dlclose(glhandle);
155
156   return handle;
157}
158
159_X_HIDDEN const __DRIextension **
160driGetDriverExtensions(void *handle, const char *driver_name)
161{
162   const __DRIextension **extensions = NULL;
163   const __DRIextension **(*get_extensions)(void);
164   char *get_extensions_name;
165
166   if (asprintf(&get_extensions_name, "%s_%s",
167                __DRI_DRIVER_GET_EXTENSIONS, driver_name) != -1) {
168      get_extensions = dlsym(handle, get_extensions_name);
169      if (get_extensions) {
170         free(get_extensions_name);
171         return get_extensions();
172      } else {
173         InfoMessageF("driver does not expose %s(): %s\n",
174                      get_extensions_name, dlerror());
175         free(get_extensions_name);
176      }
177   }
178
179   extensions = dlsym(handle, __DRI_DRIVER_EXTENSIONS);
180   if (extensions == NULL) {
181      ErrorMessageF("driver exports no extensions (%s)\n", dlerror());
182      return NULL;
183   }
184
185   return extensions;
186}
187
188static GLboolean
189__driGetMSCRate(__DRIdrawable *draw,
190		int32_t * numerator, int32_t * denominator,
191		void *loaderPrivate)
192{
193   __GLXDRIdrawable *glxDraw = loaderPrivate;
194
195   return __glxGetMscRate(glxDraw->psc, numerator, denominator);
196}
197
198_X_HIDDEN const __DRIsystemTimeExtension systemTimeExtension = {
199   .base = {__DRI_SYSTEM_TIME, 1 },
200
201   .getUST              = __glXGetUST,
202   .getMSCRate          = __driGetMSCRate
203};
204
205#define __ATTRIB(attrib, field) \
206    { attrib, offsetof(struct glx_config, field) }
207
208static const struct
209{
210   unsigned int attrib, offset;
211} attribMap[] = {
212   __ATTRIB(__DRI_ATTRIB_BUFFER_SIZE, rgbBits),
213      __ATTRIB(__DRI_ATTRIB_LEVEL, level),
214      __ATTRIB(__DRI_ATTRIB_RED_SIZE, redBits),
215      __ATTRIB(__DRI_ATTRIB_GREEN_SIZE, greenBits),
216      __ATTRIB(__DRI_ATTRIB_BLUE_SIZE, blueBits),
217      __ATTRIB(__DRI_ATTRIB_ALPHA_SIZE, alphaBits),
218      __ATTRIB(__DRI_ATTRIB_DEPTH_SIZE, depthBits),
219      __ATTRIB(__DRI_ATTRIB_STENCIL_SIZE, stencilBits),
220      __ATTRIB(__DRI_ATTRIB_ACCUM_RED_SIZE, accumRedBits),
221      __ATTRIB(__DRI_ATTRIB_ACCUM_GREEN_SIZE, accumGreenBits),
222      __ATTRIB(__DRI_ATTRIB_ACCUM_BLUE_SIZE, accumBlueBits),
223      __ATTRIB(__DRI_ATTRIB_ACCUM_ALPHA_SIZE, accumAlphaBits),
224      __ATTRIB(__DRI_ATTRIB_SAMPLE_BUFFERS, sampleBuffers),
225      __ATTRIB(__DRI_ATTRIB_SAMPLES, samples),
226      __ATTRIB(__DRI_ATTRIB_DOUBLE_BUFFER, doubleBufferMode),
227      __ATTRIB(__DRI_ATTRIB_STEREO, stereoMode),
228      __ATTRIB(__DRI_ATTRIB_AUX_BUFFERS, numAuxBuffers),
229#if 0
230      __ATTRIB(__DRI_ATTRIB_TRANSPARENT_TYPE, transparentPixel),
231      __ATTRIB(__DRI_ATTRIB_TRANSPARENT_INDEX_VALUE, transparentIndex),
232      __ATTRIB(__DRI_ATTRIB_TRANSPARENT_RED_VALUE, transparentRed),
233      __ATTRIB(__DRI_ATTRIB_TRANSPARENT_GREEN_VALUE, transparentGreen),
234      __ATTRIB(__DRI_ATTRIB_TRANSPARENT_BLUE_VALUE, transparentBlue),
235      __ATTRIB(__DRI_ATTRIB_TRANSPARENT_ALPHA_VALUE, transparentAlpha),
236      __ATTRIB(__DRI_ATTRIB_RED_MASK, redMask),
237      __ATTRIB(__DRI_ATTRIB_GREEN_MASK, greenMask),
238      __ATTRIB(__DRI_ATTRIB_BLUE_MASK, blueMask),
239      __ATTRIB(__DRI_ATTRIB_ALPHA_MASK, alphaMask),
240#endif
241      __ATTRIB(__DRI_ATTRIB_MAX_PBUFFER_WIDTH, maxPbufferWidth),
242      __ATTRIB(__DRI_ATTRIB_MAX_PBUFFER_HEIGHT, maxPbufferHeight),
243      __ATTRIB(__DRI_ATTRIB_MAX_PBUFFER_PIXELS, maxPbufferPixels),
244      __ATTRIB(__DRI_ATTRIB_OPTIMAL_PBUFFER_WIDTH, optimalPbufferWidth),
245      __ATTRIB(__DRI_ATTRIB_OPTIMAL_PBUFFER_HEIGHT, optimalPbufferHeight),
246#if 0
247      __ATTRIB(__DRI_ATTRIB_SWAP_METHOD, swapMethod),
248#endif
249__ATTRIB(__DRI_ATTRIB_BIND_TO_TEXTURE_RGB, bindToTextureRgb),
250      __ATTRIB(__DRI_ATTRIB_BIND_TO_TEXTURE_RGBA, bindToTextureRgba),
251      __ATTRIB(__DRI_ATTRIB_BIND_TO_MIPMAP_TEXTURE,
252                     bindToMipmapTexture),
253      __ATTRIB(__DRI_ATTRIB_YINVERTED, yInverted),
254      __ATTRIB(__DRI_ATTRIB_FRAMEBUFFER_SRGB_CAPABLE, sRGBCapable)
255};
256
257static int
258scalarEqual(struct glx_config *mode, unsigned int attrib, unsigned int value)
259{
260   unsigned int glxValue;
261   int i;
262
263   for (i = 0; i < ARRAY_SIZE(attribMap); i++)
264      if (attribMap[i].attrib == attrib) {
265         glxValue = *(unsigned int *) ((char *) mode + attribMap[i].offset);
266         return glxValue == GLX_DONT_CARE || glxValue == value;
267      }
268
269   return GL_TRUE;              /* Is a non-existing attribute equal to value? */
270}
271
272static int
273driConfigEqual(const __DRIcoreExtension *core,
274               struct glx_config *config, const __DRIconfig *driConfig)
275{
276   unsigned int attrib, value, glxValue;
277   int i;
278
279   i = 0;
280   while (core->indexConfigAttrib(driConfig, i++, &attrib, &value)) {
281      switch (attrib) {
282      case __DRI_ATTRIB_RENDER_TYPE:
283         glxValue = 0;
284         if (value & __DRI_ATTRIB_RGBA_BIT) {
285            glxValue |= GLX_RGBA_BIT;
286         }
287         if (value & __DRI_ATTRIB_COLOR_INDEX_BIT) {
288            glxValue |= GLX_COLOR_INDEX_BIT;
289         }
290         if (value & __DRI_ATTRIB_FLOAT_BIT) {
291            glxValue |= GLX_RGBA_FLOAT_BIT_ARB;
292         }
293         if (value & __DRI_ATTRIB_UNSIGNED_FLOAT_BIT) {
294            glxValue |= GLX_RGBA_UNSIGNED_FLOAT_BIT_EXT;
295         }
296         if (glxValue != config->renderType)
297            return GL_FALSE;
298         break;
299
300      case __DRI_ATTRIB_CONFIG_CAVEAT:
301         if (value & __DRI_ATTRIB_NON_CONFORMANT_CONFIG)
302            glxValue = GLX_NON_CONFORMANT_CONFIG;
303         else if (value & __DRI_ATTRIB_SLOW_BIT)
304            glxValue = GLX_SLOW_CONFIG;
305         else
306            glxValue = GLX_NONE;
307         if (glxValue != config->visualRating)
308            return GL_FALSE;
309         break;
310
311      case __DRI_ATTRIB_BIND_TO_TEXTURE_TARGETS:
312         glxValue = 0;
313         if (value & __DRI_ATTRIB_TEXTURE_1D_BIT)
314            glxValue |= GLX_TEXTURE_1D_BIT_EXT;
315         if (value & __DRI_ATTRIB_TEXTURE_2D_BIT)
316            glxValue |= GLX_TEXTURE_2D_BIT_EXT;
317         if (value & __DRI_ATTRIB_TEXTURE_RECTANGLE_BIT)
318            glxValue |= GLX_TEXTURE_RECTANGLE_BIT_EXT;
319         if (config->bindToTextureTargets != GLX_DONT_CARE &&
320             glxValue != config->bindToTextureTargets)
321            return GL_FALSE;
322         break;
323
324      default:
325         if (!scalarEqual(config, attrib, value))
326            return GL_FALSE;
327      }
328   }
329
330   return GL_TRUE;
331}
332
333static struct glx_config *
334createDriMode(const __DRIcoreExtension * core,
335	      struct glx_config *config, const __DRIconfig **driConfigs)
336{
337   __GLXDRIconfigPrivate *driConfig;
338   int i;
339
340   for (i = 0; driConfigs[i]; i++) {
341      if (driConfigEqual(core, config, driConfigs[i]))
342         break;
343   }
344
345   if (driConfigs[i] == NULL)
346      return NULL;
347
348   driConfig = malloc(sizeof *driConfig);
349   if (driConfig == NULL)
350      return NULL;
351
352   driConfig->base = *config;
353   driConfig->driConfig = driConfigs[i];
354
355   return &driConfig->base;
356}
357
358_X_HIDDEN struct glx_config *
359driConvertConfigs(const __DRIcoreExtension * core,
360                  struct glx_config *configs, const __DRIconfig **driConfigs)
361{
362   struct glx_config head, *tail, *m;
363
364   tail = &head;
365   head.next = NULL;
366   for (m = configs; m; m = m->next) {
367      tail->next = createDriMode(core, m, driConfigs);
368      if (tail->next == NULL) {
369         /* no matching dri config for m */
370         continue;
371      }
372
373
374      tail = tail->next;
375   }
376
377   return head.next;
378}
379
380_X_HIDDEN void
381driDestroyConfigs(const __DRIconfig **configs)
382{
383   int i;
384
385   for (i = 0; configs[i]; i++)
386      free((__DRIconfig *) configs[i]);
387   free(configs);
388}
389
390_X_HIDDEN __GLXDRIdrawable *
391driFetchDrawable(struct glx_context *gc, GLXDrawable glxDrawable)
392{
393   struct glx_display *const priv = __glXInitialize(gc->psc->dpy);
394   __GLXDRIdrawable *pdraw;
395   struct glx_screen *psc;
396
397   if (priv == NULL)
398      return NULL;
399
400   if (glxDrawable == None)
401      return NULL;
402
403   psc = priv->screens[gc->screen];
404   if (priv->drawHash == NULL)
405      return NULL;
406
407   if (__glxHashLookup(priv->drawHash, glxDrawable, (void *) &pdraw) == 0) {
408      pdraw->refcount ++;
409      return pdraw;
410   }
411
412   pdraw = psc->driScreen->createDrawable(psc, glxDrawable,
413                                          glxDrawable, gc->config);
414
415   if (pdraw == NULL) {
416      ErrorMessageF("failed to create drawable\n");
417      return NULL;
418   }
419
420   if (__glxHashInsert(priv->drawHash, glxDrawable, pdraw)) {
421      (*pdraw->destroyDrawable) (pdraw);
422      return NULL;
423   }
424   pdraw->refcount = 1;
425
426   return pdraw;
427}
428
429_X_HIDDEN void
430driReleaseDrawables(struct glx_context *gc)
431{
432   const struct glx_display *priv = gc->psc->display;
433   __GLXDRIdrawable *pdraw;
434
435   if (priv == NULL)
436      return;
437
438   if (__glxHashLookup(priv->drawHash,
439		       gc->currentDrawable, (void *) &pdraw) == 0) {
440      if (pdraw->drawable == pdraw->xDrawable) {
441	 pdraw->refcount --;
442	 if (pdraw->refcount == 0) {
443	    (*pdraw->destroyDrawable)(pdraw);
444	    __glxHashDelete(priv->drawHash, gc->currentDrawable);
445	 }
446      }
447   }
448
449   if (__glxHashLookup(priv->drawHash,
450		       gc->currentReadable, (void *) &pdraw) == 0) {
451      if (pdraw->drawable == pdraw->xDrawable) {
452	 pdraw->refcount --;
453	 if (pdraw->refcount == 0) {
454	    (*pdraw->destroyDrawable)(pdraw);
455	    __glxHashDelete(priv->drawHash, gc->currentReadable);
456	 }
457      }
458   }
459
460   gc->currentDrawable = None;
461   gc->currentReadable = None;
462
463}
464
465_X_HIDDEN bool
466dri2_convert_glx_attribs(unsigned num_attribs, const uint32_t *attribs,
467                         unsigned *major_ver, unsigned *minor_ver,
468                         uint32_t *render_type, uint32_t *flags, unsigned *api,
469                         int *reset, unsigned *error)
470{
471   unsigned i;
472   bool got_profile = false;
473   uint32_t profile;
474
475   *major_ver = 1;
476   *minor_ver = 0;
477   *render_type = GLX_RGBA_TYPE;
478   *reset = __DRI_CTX_RESET_NO_NOTIFICATION;
479   *flags = 0;
480   *api = __DRI_API_OPENGL;
481
482   if (num_attribs == 0) {
483      return true;
484   }
485
486   /* This is actually an internal error, but what the heck.
487    */
488   if (attribs == NULL) {
489      *error = __DRI_CTX_ERROR_UNKNOWN_ATTRIBUTE;
490      return false;
491   }
492
493   for (i = 0; i < num_attribs; i++) {
494      switch (attribs[i * 2]) {
495      case GLX_CONTEXT_MAJOR_VERSION_ARB:
496	 *major_ver = attribs[i * 2 + 1];
497	 break;
498      case GLX_CONTEXT_MINOR_VERSION_ARB:
499	 *minor_ver = attribs[i * 2 + 1];
500	 break;
501      case GLX_CONTEXT_FLAGS_ARB:
502	 *flags = attribs[i * 2 + 1];
503	 break;
504      case GLX_CONTEXT_PROFILE_MASK_ARB:
505	 profile = attribs[i * 2 + 1];
506	 got_profile = true;
507	 break;
508      case GLX_RENDER_TYPE:
509         *render_type = attribs[i * 2 + 1];
510	 break;
511      case GLX_CONTEXT_RESET_NOTIFICATION_STRATEGY_ARB:
512         switch (attribs[i * 2 + 1]) {
513         case GLX_NO_RESET_NOTIFICATION_ARB:
514            *reset = __DRI_CTX_RESET_NO_NOTIFICATION;
515            break;
516         case GLX_LOSE_CONTEXT_ON_RESET_ARB:
517            *reset = __DRI_CTX_RESET_LOSE_CONTEXT;
518            break;
519         default:
520            *error = __DRI_CTX_ERROR_UNKNOWN_ATTRIBUTE;
521            return false;
522         }
523         break;
524      default:
525	 /* If an unknown attribute is received, fail.
526	  */
527	 *error = __DRI_CTX_ERROR_UNKNOWN_ATTRIBUTE;
528	 return false;
529      }
530   }
531
532   if (!got_profile) {
533      if (*major_ver > 3 || (*major_ver == 3 && *minor_ver >= 2))
534	 *api = __DRI_API_OPENGL_CORE;
535   } else {
536      switch (profile) {
537      case GLX_CONTEXT_CORE_PROFILE_BIT_ARB:
538	 /* There are no profiles before OpenGL 3.2.  The
539	  * GLX_ARB_create_context_profile spec says:
540	  *
541	  *     "If the requested OpenGL version is less than 3.2,
542	  *     GLX_CONTEXT_PROFILE_MASK_ARB is ignored and the functionality
543	  *     of the context is determined solely by the requested version."
544	  */
545	 *api = (*major_ver > 3 || (*major_ver == 3 && *minor_ver >= 2))
546	    ? __DRI_API_OPENGL_CORE : __DRI_API_OPENGL;
547	 break;
548      case GLX_CONTEXT_COMPATIBILITY_PROFILE_BIT_ARB:
549	 *api = __DRI_API_OPENGL;
550	 break;
551      case GLX_CONTEXT_ES2_PROFILE_BIT_EXT:
552	 *api = __DRI_API_GLES2;
553	 break;
554      default:
555	 *error = __DRI_CTX_ERROR_BAD_API;
556	 return false;
557      }
558   }
559
560   /* Unknown flag value.
561    */
562   if (*flags & ~(__DRI_CTX_FLAG_DEBUG | __DRI_CTX_FLAG_FORWARD_COMPATIBLE
563                  | __DRI_CTX_FLAG_ROBUST_BUFFER_ACCESS)) {
564      *error = __DRI_CTX_ERROR_UNKNOWN_FLAG;
565      return false;
566   }
567
568   /* There are no forward-compatible contexts before OpenGL 3.0.  The
569    * GLX_ARB_create_context spec says:
570    *
571    *     "Forward-compatible contexts are defined only for OpenGL versions
572    *     3.0 and later."
573    */
574   if (*major_ver < 3 && (*flags & __DRI_CTX_FLAG_FORWARD_COMPATIBLE) != 0) {
575      *error = __DRI_CTX_ERROR_BAD_FLAG;
576      return false;
577   }
578
579   if (*major_ver >= 3 && *render_type == GLX_COLOR_INDEX_TYPE) {
580      *error = __DRI_CTX_ERROR_BAD_FLAG;
581      return false;
582   }
583
584   /* The GLX_EXT_create_context_es2_profile spec says:
585    *
586    *     "... If the version requested is 2.0, and the
587    *     GLX_CONTEXT_ES2_PROFILE_BIT_EXT bit is set in the
588    *     GLX_CONTEXT_PROFILE_MASK_ARB attribute (see below), then the context
589    *     returned will implement OpenGL ES 2.0. This is the only way in which
590    *     an implementation may request an OpenGL ES 2.0 context."
591    */
592   if (*api == __DRI_API_GLES2 && (*major_ver != 2 || *minor_ver != 0)) {
593      *error = __DRI_CTX_ERROR_BAD_API;
594      return false;
595   }
596
597   *error = __DRI_CTX_ERROR_SUCCESS;
598   return true;
599}
600
601#endif /* GLX_DIRECT_RENDERING */
602