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
dri_message(int level,const char * f,...)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 #ifndef DEFAULT_DRIVER_DIR
81 /* this is normally defined in Mesa/configs/default with DRI_DRIVER_SEARCH_PATH */
82 #define DEFAULT_DRIVER_DIR "/usr/local/lib/dri"
83 #endif
84
85 /**
86 * Try to \c dlopen the named driver.
87 *
88 * This function adds the "_dri.so" suffix to the driver name and searches the
89 * directories specified by the \c LIBGL_DRIVERS_PATH environment variable in
90 * order to find the driver.
91 *
92 * \param driverName - a name like "i965", "radeon", "nouveau", etc.
93 *
94 * \returns
95 * A handle from \c dlopen, or \c NULL if driver file not found.
96 */
97 _X_HIDDEN void *
driOpenDriver(const char * driverName)98 driOpenDriver(const char *driverName)
99 {
100 void *glhandle, *handle;
101 const char *libPaths, *p, *next;
102 char realDriverName[200];
103 int len;
104
105 /* Attempt to make sure libGL symbols will be visible to the driver */
106 glhandle = dlopen(GL_LIB_NAME, RTLD_NOW | RTLD_GLOBAL);
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 **
driGetDriverExtensions(void * handle,const char * driver_name)160 driGetDriverExtensions(void *handle, const char *driver_name)
161 {
162 const __DRIextension **extensions = NULL;
163 const __DRIextension **(*get_extensions)(void);
164 char *get_extensions_name = loader_get_extensions_name(driver_name);
165
166 if (get_extensions_name) {
167 get_extensions = dlsym(handle, get_extensions_name);
168 if (get_extensions) {
169 free(get_extensions_name);
170 return get_extensions();
171 } else {
172 InfoMessageF("driver does not expose %s(): %s\n",
173 get_extensions_name, dlerror());
174 free(get_extensions_name);
175 }
176 }
177
178 extensions = dlsym(handle, __DRI_DRIVER_EXTENSIONS);
179 if (extensions == NULL) {
180 ErrorMessageF("driver exports no extensions (%s)\n", dlerror());
181 return NULL;
182 }
183
184 return extensions;
185 }
186
187 static GLboolean
__driGetMSCRate(__DRIdrawable * draw,int32_t * numerator,int32_t * denominator,void * loaderPrivate)188 __driGetMSCRate(__DRIdrawable *draw,
189 int32_t * numerator, int32_t * denominator,
190 void *loaderPrivate)
191 {
192 __GLXDRIdrawable *glxDraw = loaderPrivate;
193
194 return __glxGetMscRate(glxDraw->psc, numerator, denominator);
195 }
196
197 _X_HIDDEN const __DRIsystemTimeExtension systemTimeExtension = {
198 .base = {__DRI_SYSTEM_TIME, 1 },
199
200 .getUST = __glXGetUST,
201 .getMSCRate = __driGetMSCRate
202 };
203
204 #define __ATTRIB(attrib, field) \
205 { attrib, offsetof(struct glx_config, field) }
206
207 static const struct
208 {
209 unsigned int attrib, offset;
210 } attribMap[] = {
211 __ATTRIB(__DRI_ATTRIB_BUFFER_SIZE, rgbBits),
212 __ATTRIB(__DRI_ATTRIB_LEVEL, level),
213 __ATTRIB(__DRI_ATTRIB_RED_SIZE, redBits),
214 __ATTRIB(__DRI_ATTRIB_GREEN_SIZE, greenBits),
215 __ATTRIB(__DRI_ATTRIB_BLUE_SIZE, blueBits),
216 __ATTRIB(__DRI_ATTRIB_ALPHA_SIZE, alphaBits),
217 __ATTRIB(__DRI_ATTRIB_DEPTH_SIZE, depthBits),
218 __ATTRIB(__DRI_ATTRIB_STENCIL_SIZE, stencilBits),
219 __ATTRIB(__DRI_ATTRIB_ACCUM_RED_SIZE, accumRedBits),
220 __ATTRIB(__DRI_ATTRIB_ACCUM_GREEN_SIZE, accumGreenBits),
221 __ATTRIB(__DRI_ATTRIB_ACCUM_BLUE_SIZE, accumBlueBits),
222 __ATTRIB(__DRI_ATTRIB_ACCUM_ALPHA_SIZE, accumAlphaBits),
223 __ATTRIB(__DRI_ATTRIB_SAMPLE_BUFFERS, sampleBuffers),
224 __ATTRIB(__DRI_ATTRIB_SAMPLES, samples),
225 __ATTRIB(__DRI_ATTRIB_DOUBLE_BUFFER, doubleBufferMode),
226 __ATTRIB(__DRI_ATTRIB_STEREO, stereoMode),
227 __ATTRIB(__DRI_ATTRIB_AUX_BUFFERS, numAuxBuffers),
228 #if 0
229 __ATTRIB(__DRI_ATTRIB_TRANSPARENT_TYPE, transparentPixel),
230 __ATTRIB(__DRI_ATTRIB_TRANSPARENT_INDEX_VALUE, transparentIndex),
231 __ATTRIB(__DRI_ATTRIB_TRANSPARENT_RED_VALUE, transparentRed),
232 __ATTRIB(__DRI_ATTRIB_TRANSPARENT_GREEN_VALUE, transparentGreen),
233 __ATTRIB(__DRI_ATTRIB_TRANSPARENT_BLUE_VALUE, transparentBlue),
234 __ATTRIB(__DRI_ATTRIB_TRANSPARENT_ALPHA_VALUE, transparentAlpha),
235 __ATTRIB(__DRI_ATTRIB_RED_MASK, redMask),
236 __ATTRIB(__DRI_ATTRIB_GREEN_MASK, greenMask),
237 __ATTRIB(__DRI_ATTRIB_BLUE_MASK, blueMask),
238 __ATTRIB(__DRI_ATTRIB_ALPHA_MASK, alphaMask),
239 #endif
240 __ATTRIB(__DRI_ATTRIB_MAX_PBUFFER_WIDTH, maxPbufferWidth),
241 __ATTRIB(__DRI_ATTRIB_MAX_PBUFFER_HEIGHT, maxPbufferHeight),
242 __ATTRIB(__DRI_ATTRIB_MAX_PBUFFER_PIXELS, maxPbufferPixels),
243 __ATTRIB(__DRI_ATTRIB_OPTIMAL_PBUFFER_WIDTH, optimalPbufferWidth),
244 __ATTRIB(__DRI_ATTRIB_OPTIMAL_PBUFFER_HEIGHT, optimalPbufferHeight),
245 #if 0
246 __ATTRIB(__DRI_ATTRIB_SWAP_METHOD, swapMethod),
247 #endif
248 __ATTRIB(__DRI_ATTRIB_BIND_TO_TEXTURE_RGB, bindToTextureRgb),
249 __ATTRIB(__DRI_ATTRIB_BIND_TO_TEXTURE_RGBA, bindToTextureRgba),
250 __ATTRIB(__DRI_ATTRIB_BIND_TO_MIPMAP_TEXTURE,
251 bindToMipmapTexture),
252 __ATTRIB(__DRI_ATTRIB_YINVERTED, yInverted),
253 __ATTRIB(__DRI_ATTRIB_FRAMEBUFFER_SRGB_CAPABLE, sRGBCapable)
254 };
255
256 static int
scalarEqual(struct glx_config * mode,unsigned int attrib,unsigned int value)257 scalarEqual(struct glx_config *mode, unsigned int attrib, unsigned int value)
258 {
259 unsigned glxValue, i;
260
261 for (i = 0; i < ARRAY_SIZE(attribMap); i++)
262 if (attribMap[i].attrib == attrib) {
263 glxValue = *(unsigned int *) ((char *) mode + attribMap[i].offset);
264 return glxValue == GLX_DONT_CARE || glxValue == value;
265 }
266
267 return GL_TRUE; /* Is a non-existing attribute equal to value? */
268 }
269
270 static int
driConfigEqual(const __DRIcoreExtension * core,struct glx_config * config,const __DRIconfig * driConfig)271 driConfigEqual(const __DRIcoreExtension *core,
272 struct glx_config *config, const __DRIconfig *driConfig)
273 {
274 unsigned int attrib, value, glxValue;
275 int i;
276
277 i = 0;
278 while (core->indexConfigAttrib(driConfig, i++, &attrib, &value)) {
279 switch (attrib) {
280 case __DRI_ATTRIB_RENDER_TYPE:
281 glxValue = 0;
282 if (value & __DRI_ATTRIB_RGBA_BIT) {
283 glxValue |= GLX_RGBA_BIT;
284 }
285 if (value & __DRI_ATTRIB_COLOR_INDEX_BIT) {
286 glxValue |= GLX_COLOR_INDEX_BIT;
287 }
288 if (value & __DRI_ATTRIB_FLOAT_BIT) {
289 glxValue |= GLX_RGBA_FLOAT_BIT_ARB;
290 }
291 if (value & __DRI_ATTRIB_UNSIGNED_FLOAT_BIT) {
292 glxValue |= GLX_RGBA_UNSIGNED_FLOAT_BIT_EXT;
293 }
294 if (glxValue != config->renderType)
295 return GL_FALSE;
296 break;
297
298 case __DRI_ATTRIB_CONFIG_CAVEAT:
299 if (value & __DRI_ATTRIB_NON_CONFORMANT_CONFIG)
300 glxValue = GLX_NON_CONFORMANT_CONFIG;
301 else if (value & __DRI_ATTRIB_SLOW_BIT)
302 glxValue = GLX_SLOW_CONFIG;
303 else
304 glxValue = GLX_NONE;
305 if (glxValue != config->visualRating)
306 return GL_FALSE;
307 break;
308
309 case __DRI_ATTRIB_BIND_TO_TEXTURE_TARGETS:
310 glxValue = 0;
311 if (value & __DRI_ATTRIB_TEXTURE_1D_BIT)
312 glxValue |= GLX_TEXTURE_1D_BIT_EXT;
313 if (value & __DRI_ATTRIB_TEXTURE_2D_BIT)
314 glxValue |= GLX_TEXTURE_2D_BIT_EXT;
315 if (value & __DRI_ATTRIB_TEXTURE_RECTANGLE_BIT)
316 glxValue |= GLX_TEXTURE_RECTANGLE_BIT_EXT;
317 if (config->bindToTextureTargets != GLX_DONT_CARE &&
318 glxValue != config->bindToTextureTargets)
319 return GL_FALSE;
320 break;
321
322 default:
323 if (!scalarEqual(config, attrib, value))
324 return GL_FALSE;
325 }
326 }
327
328 return GL_TRUE;
329 }
330
331 static struct glx_config *
createDriMode(const __DRIcoreExtension * core,struct glx_config * config,const __DRIconfig ** driConfigs)332 createDriMode(const __DRIcoreExtension * core,
333 struct glx_config *config, const __DRIconfig **driConfigs)
334 {
335 __GLXDRIconfigPrivate *driConfig;
336 int i;
337
338 for (i = 0; driConfigs[i]; i++) {
339 if (driConfigEqual(core, config, driConfigs[i]))
340 break;
341 }
342
343 if (driConfigs[i] == NULL)
344 return NULL;
345
346 driConfig = malloc(sizeof *driConfig);
347 if (driConfig == NULL)
348 return NULL;
349
350 driConfig->base = *config;
351 driConfig->driConfig = driConfigs[i];
352
353 return &driConfig->base;
354 }
355
356 _X_HIDDEN struct glx_config *
driConvertConfigs(const __DRIcoreExtension * core,struct glx_config * configs,const __DRIconfig ** driConfigs)357 driConvertConfigs(const __DRIcoreExtension * core,
358 struct glx_config *configs, const __DRIconfig **driConfigs)
359 {
360 struct glx_config head, *tail, *m;
361
362 tail = &head;
363 head.next = NULL;
364 for (m = configs; m; m = m->next) {
365 tail->next = createDriMode(core, m, driConfigs);
366 if (tail->next == NULL) {
367 /* no matching dri config for m */
368 continue;
369 }
370
371
372 tail = tail->next;
373 }
374
375 return head.next;
376 }
377
378 _X_HIDDEN void
driDestroyConfigs(const __DRIconfig ** configs)379 driDestroyConfigs(const __DRIconfig **configs)
380 {
381 int i;
382
383 for (i = 0; configs[i]; i++)
384 free((__DRIconfig *) configs[i]);
385 free(configs);
386 }
387
388 _X_HIDDEN __GLXDRIdrawable *
driFetchDrawable(struct glx_context * gc,GLXDrawable glxDrawable)389 driFetchDrawable(struct glx_context *gc, GLXDrawable glxDrawable)
390 {
391 struct glx_display *const priv = __glXInitialize(gc->psc->dpy);
392 __GLXDRIdrawable *pdraw;
393 struct glx_screen *psc;
394
395 if (priv == NULL)
396 return NULL;
397
398 if (glxDrawable == None)
399 return NULL;
400
401 psc = priv->screens[gc->screen];
402 if (priv->drawHash == NULL)
403 return NULL;
404
405 if (__glxHashLookup(priv->drawHash, glxDrawable, (void *) &pdraw) == 0) {
406 pdraw->refcount ++;
407 return pdraw;
408 }
409
410 pdraw = psc->driScreen->createDrawable(psc, glxDrawable,
411 glxDrawable, gc->config);
412
413 if (pdraw == NULL) {
414 ErrorMessageF("failed to create drawable\n");
415 return NULL;
416 }
417
418 if (__glxHashInsert(priv->drawHash, glxDrawable, pdraw)) {
419 (*pdraw->destroyDrawable) (pdraw);
420 return NULL;
421 }
422 pdraw->refcount = 1;
423
424 return pdraw;
425 }
426
427 _X_HIDDEN void
driReleaseDrawables(struct glx_context * gc)428 driReleaseDrawables(struct glx_context *gc)
429 {
430 const struct glx_display *priv = gc->psc->display;
431 __GLXDRIdrawable *pdraw;
432
433 if (priv == NULL)
434 return;
435
436 if (__glxHashLookup(priv->drawHash,
437 gc->currentDrawable, (void *) &pdraw) == 0) {
438 if (pdraw->drawable == pdraw->xDrawable) {
439 pdraw->refcount --;
440 if (pdraw->refcount == 0) {
441 (*pdraw->destroyDrawable)(pdraw);
442 __glxHashDelete(priv->drawHash, gc->currentDrawable);
443 }
444 }
445 }
446
447 if (__glxHashLookup(priv->drawHash,
448 gc->currentReadable, (void *) &pdraw) == 0) {
449 if (pdraw->drawable == pdraw->xDrawable) {
450 pdraw->refcount --;
451 if (pdraw->refcount == 0) {
452 (*pdraw->destroyDrawable)(pdraw);
453 __glxHashDelete(priv->drawHash, gc->currentReadable);
454 }
455 }
456 }
457
458 gc->currentDrawable = None;
459 gc->currentReadable = None;
460
461 }
462
463 _X_HIDDEN bool
dri2_convert_glx_attribs(unsigned num_attribs,const uint32_t * attribs,unsigned * major_ver,unsigned * minor_ver,uint32_t * render_type,uint32_t * flags,unsigned * api,int * reset,unsigned * error)464 dri2_convert_glx_attribs(unsigned num_attribs, const uint32_t *attribs,
465 unsigned *major_ver, unsigned *minor_ver,
466 uint32_t *render_type, uint32_t *flags, unsigned *api,
467 int *reset, unsigned *error)
468 {
469 unsigned i;
470 bool got_profile = false;
471 uint32_t profile;
472
473 *major_ver = 1;
474 *minor_ver = 0;
475 *render_type = GLX_RGBA_TYPE;
476 *reset = __DRI_CTX_RESET_NO_NOTIFICATION;
477 *flags = 0;
478 *api = __DRI_API_OPENGL;
479
480 if (num_attribs == 0) {
481 return true;
482 }
483
484 /* This is actually an internal error, but what the heck.
485 */
486 if (attribs == NULL) {
487 *error = __DRI_CTX_ERROR_UNKNOWN_ATTRIBUTE;
488 return false;
489 }
490
491 for (i = 0; i < num_attribs; i++) {
492 switch (attribs[i * 2]) {
493 case GLX_CONTEXT_MAJOR_VERSION_ARB:
494 *major_ver = attribs[i * 2 + 1];
495 break;
496 case GLX_CONTEXT_MINOR_VERSION_ARB:
497 *minor_ver = attribs[i * 2 + 1];
498 break;
499 case GLX_CONTEXT_FLAGS_ARB:
500 *flags = attribs[i * 2 + 1];
501 break;
502 case GLX_CONTEXT_PROFILE_MASK_ARB:
503 profile = attribs[i * 2 + 1];
504 got_profile = true;
505 break;
506 case GLX_RENDER_TYPE:
507 *render_type = attribs[i * 2 + 1];
508 break;
509 case GLX_CONTEXT_RESET_NOTIFICATION_STRATEGY_ARB:
510 switch (attribs[i * 2 + 1]) {
511 case GLX_NO_RESET_NOTIFICATION_ARB:
512 *reset = __DRI_CTX_RESET_NO_NOTIFICATION;
513 break;
514 case GLX_LOSE_CONTEXT_ON_RESET_ARB:
515 *reset = __DRI_CTX_RESET_LOSE_CONTEXT;
516 break;
517 default:
518 *error = __DRI_CTX_ERROR_UNKNOWN_ATTRIBUTE;
519 return false;
520 }
521 break;
522 default:
523 /* If an unknown attribute is received, fail.
524 */
525 *error = __DRI_CTX_ERROR_UNKNOWN_ATTRIBUTE;
526 return false;
527 }
528 }
529
530 if (!got_profile) {
531 if (*major_ver > 3 || (*major_ver == 3 && *minor_ver >= 2))
532 *api = __DRI_API_OPENGL_CORE;
533 } else {
534 switch (profile) {
535 case GLX_CONTEXT_CORE_PROFILE_BIT_ARB:
536 /* There are no profiles before OpenGL 3.2. The
537 * GLX_ARB_create_context_profile spec says:
538 *
539 * "If the requested OpenGL version is less than 3.2,
540 * GLX_CONTEXT_PROFILE_MASK_ARB is ignored and the functionality
541 * of the context is determined solely by the requested version."
542 */
543 *api = (*major_ver > 3 || (*major_ver == 3 && *minor_ver >= 2))
544 ? __DRI_API_OPENGL_CORE : __DRI_API_OPENGL;
545 break;
546 case GLX_CONTEXT_COMPATIBILITY_PROFILE_BIT_ARB:
547 *api = __DRI_API_OPENGL;
548 break;
549 case GLX_CONTEXT_ES_PROFILE_BIT_EXT:
550 if (*major_ver >= 3)
551 *api = __DRI_API_GLES3;
552 else if (*major_ver == 2 && *minor_ver == 0)
553 *api = __DRI_API_GLES2;
554 else if (*major_ver == 1 && *minor_ver < 2)
555 *api = __DRI_API_GLES;
556 else {
557 *error = __DRI_CTX_ERROR_BAD_API;
558 return false;
559 }
560 break;
561 default:
562 *error = __DRI_CTX_ERROR_BAD_API;
563 return false;
564 }
565 }
566
567 /* Unknown flag value.
568 */
569 if (*flags & ~(__DRI_CTX_FLAG_DEBUG | __DRI_CTX_FLAG_FORWARD_COMPATIBLE
570 | __DRI_CTX_FLAG_ROBUST_BUFFER_ACCESS)) {
571 *error = __DRI_CTX_ERROR_UNKNOWN_FLAG;
572 return false;
573 }
574
575 /* There are no forward-compatible contexts before OpenGL 3.0. The
576 * GLX_ARB_create_context spec says:
577 *
578 * "Forward-compatible contexts are defined only for OpenGL versions
579 * 3.0 and later."
580 */
581 if (*major_ver < 3 && (*flags & __DRI_CTX_FLAG_FORWARD_COMPATIBLE) != 0) {
582 *error = __DRI_CTX_ERROR_BAD_FLAG;
583 return false;
584 }
585
586 if (*major_ver >= 3 && *render_type == GLX_COLOR_INDEX_TYPE) {
587 *error = __DRI_CTX_ERROR_BAD_FLAG;
588 return false;
589 }
590
591 *error = __DRI_CTX_ERROR_SUCCESS;
592 return true;
593 }
594
595 #endif /* GLX_DIRECT_RENDERING */
596