glx: Implement GLX_ARB_context_flush_control
[mesa.git] / 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 #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 *
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 **
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
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 __ATTRIB(__DRI_ATTRIB_SWAP_METHOD, swapMethod),
246 __ATTRIB(__DRI_ATTRIB_BIND_TO_TEXTURE_RGB, bindToTextureRgb),
247 __ATTRIB(__DRI_ATTRIB_BIND_TO_TEXTURE_RGBA, bindToTextureRgba),
248 __ATTRIB(__DRI_ATTRIB_BIND_TO_MIPMAP_TEXTURE,
249 bindToMipmapTexture),
250 __ATTRIB(__DRI_ATTRIB_YINVERTED, yInverted),
251 __ATTRIB(__DRI_ATTRIB_FRAMEBUFFER_SRGB_CAPABLE, sRGBCapable)
252 };
253
254 static int
255 scalarEqual(struct glx_config *mode, unsigned int attrib, unsigned int value)
256 {
257 unsigned glxValue, i;
258
259 for (i = 0; i < ARRAY_SIZE(attribMap); i++)
260 if (attribMap[i].attrib == attrib) {
261 glxValue = *(unsigned int *) ((char *) mode + attribMap[i].offset);
262 return glxValue == GLX_DONT_CARE || glxValue == value;
263 }
264
265 return GL_TRUE; /* Is a non-existing attribute equal to value? */
266 }
267
268 static int
269 driConfigEqual(const __DRIcoreExtension *core,
270 struct glx_config *config, const __DRIconfig *driConfig)
271 {
272 unsigned int attrib, value, glxValue;
273 int i;
274
275 i = 0;
276 while (core->indexConfigAttrib(driConfig, i++, &attrib, &value)) {
277 switch (attrib) {
278 case __DRI_ATTRIB_RENDER_TYPE:
279 glxValue = 0;
280 if (value & __DRI_ATTRIB_RGBA_BIT) {
281 glxValue |= GLX_RGBA_BIT;
282 }
283 if (value & __DRI_ATTRIB_COLOR_INDEX_BIT) {
284 glxValue |= GLX_COLOR_INDEX_BIT;
285 }
286 if (value & __DRI_ATTRIB_FLOAT_BIT) {
287 glxValue |= GLX_RGBA_FLOAT_BIT_ARB;
288 }
289 if (value & __DRI_ATTRIB_UNSIGNED_FLOAT_BIT) {
290 glxValue |= GLX_RGBA_UNSIGNED_FLOAT_BIT_EXT;
291 }
292 if (glxValue != config->renderType)
293 return GL_FALSE;
294 break;
295
296 case __DRI_ATTRIB_CONFIG_CAVEAT:
297 if (value & __DRI_ATTRIB_NON_CONFORMANT_CONFIG)
298 glxValue = GLX_NON_CONFORMANT_CONFIG;
299 else if (value & __DRI_ATTRIB_SLOW_BIT)
300 glxValue = GLX_SLOW_CONFIG;
301 else
302 glxValue = GLX_NONE;
303 if (glxValue != config->visualRating)
304 return GL_FALSE;
305 break;
306
307 case __DRI_ATTRIB_BIND_TO_TEXTURE_TARGETS:
308 glxValue = 0;
309 if (value & __DRI_ATTRIB_TEXTURE_1D_BIT)
310 glxValue |= GLX_TEXTURE_1D_BIT_EXT;
311 if (value & __DRI_ATTRIB_TEXTURE_2D_BIT)
312 glxValue |= GLX_TEXTURE_2D_BIT_EXT;
313 if (value & __DRI_ATTRIB_TEXTURE_RECTANGLE_BIT)
314 glxValue |= GLX_TEXTURE_RECTANGLE_BIT_EXT;
315 if (config->bindToTextureTargets != GLX_DONT_CARE &&
316 glxValue != config->bindToTextureTargets)
317 return GL_FALSE;
318 break;
319
320 case __DRI_ATTRIB_SWAP_METHOD:
321 if (value == __DRI_ATTRIB_SWAP_EXCHANGE)
322 glxValue = GLX_SWAP_EXCHANGE_OML;
323 else if (value == __DRI_ATTRIB_SWAP_COPY)
324 glxValue = GLX_SWAP_COPY_OML;
325 else
326 glxValue = GLX_SWAP_UNDEFINED_OML;
327
328 if (!scalarEqual(config, attrib, glxValue))
329 return GL_FALSE;
330
331 break;
332
333 default:
334 if (!scalarEqual(config, attrib, value))
335 return GL_FALSE;
336 }
337 }
338
339 return GL_TRUE;
340 }
341
342 static struct glx_config *
343 createDriMode(const __DRIcoreExtension * core,
344 struct glx_config *config, const __DRIconfig **driConfigs)
345 {
346 __GLXDRIconfigPrivate *driConfig;
347 int i;
348
349 for (i = 0; driConfigs[i]; i++) {
350 if (driConfigEqual(core, config, driConfigs[i]))
351 break;
352 }
353
354 if (driConfigs[i] == NULL)
355 return NULL;
356
357 driConfig = malloc(sizeof *driConfig);
358 if (driConfig == NULL)
359 return NULL;
360
361 driConfig->base = *config;
362 driConfig->driConfig = driConfigs[i];
363
364 return &driConfig->base;
365 }
366
367 _X_HIDDEN struct glx_config *
368 driConvertConfigs(const __DRIcoreExtension * core,
369 struct glx_config *configs, const __DRIconfig **driConfigs)
370 {
371 struct glx_config head, *tail, *m;
372
373 tail = &head;
374 head.next = NULL;
375 for (m = configs; m; m = m->next) {
376 tail->next = createDriMode(core, m, driConfigs);
377 if (tail->next == NULL) {
378 /* no matching dri config for m */
379 continue;
380 }
381
382
383 tail = tail->next;
384 }
385
386 return head.next;
387 }
388
389 _X_HIDDEN void
390 driDestroyConfigs(const __DRIconfig **configs)
391 {
392 int i;
393
394 for (i = 0; configs[i]; i++)
395 free((__DRIconfig *) configs[i]);
396 free(configs);
397 }
398
399 _X_HIDDEN __GLXDRIdrawable *
400 driFetchDrawable(struct glx_context *gc, GLXDrawable glxDrawable)
401 {
402 struct glx_display *const priv = __glXInitialize(gc->psc->dpy);
403 __GLXDRIdrawable *pdraw;
404 struct glx_screen *psc;
405
406 if (priv == NULL)
407 return NULL;
408
409 if (glxDrawable == None)
410 return NULL;
411
412 psc = priv->screens[gc->screen];
413 if (priv->drawHash == NULL)
414 return NULL;
415
416 if (__glxHashLookup(priv->drawHash, glxDrawable, (void *) &pdraw) == 0) {
417 pdraw->refcount ++;
418 return pdraw;
419 }
420
421 pdraw = psc->driScreen->createDrawable(psc, glxDrawable,
422 glxDrawable, gc->config);
423
424 if (pdraw == NULL) {
425 ErrorMessageF("failed to create drawable\n");
426 return NULL;
427 }
428
429 if (__glxHashInsert(priv->drawHash, glxDrawable, pdraw)) {
430 (*pdraw->destroyDrawable) (pdraw);
431 return NULL;
432 }
433 pdraw->refcount = 1;
434
435 return pdraw;
436 }
437
438 _X_HIDDEN void
439 driReleaseDrawables(struct glx_context *gc)
440 {
441 const struct glx_display *priv = gc->psc->display;
442 __GLXDRIdrawable *pdraw;
443
444 if (priv == NULL)
445 return;
446
447 if (__glxHashLookup(priv->drawHash,
448 gc->currentDrawable, (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->currentDrawable);
454 }
455 }
456 }
457
458 if (__glxHashLookup(priv->drawHash,
459 gc->currentReadable, (void *) &pdraw) == 0) {
460 if (pdraw->drawable == pdraw->xDrawable) {
461 pdraw->refcount --;
462 if (pdraw->refcount == 0) {
463 (*pdraw->destroyDrawable)(pdraw);
464 __glxHashDelete(priv->drawHash, gc->currentReadable);
465 }
466 }
467 }
468
469 gc->currentDrawable = None;
470 gc->currentReadable = None;
471
472 }
473
474 _X_HIDDEN bool
475 dri2_convert_glx_attribs(unsigned num_attribs, const uint32_t *attribs,
476 unsigned *major_ver, unsigned *minor_ver,
477 uint32_t *render_type, uint32_t *flags, unsigned *api,
478 int *reset, int *release, unsigned *error)
479 {
480 unsigned i;
481 bool got_profile = false;
482 uint32_t profile;
483
484 *major_ver = 1;
485 *minor_ver = 0;
486 *render_type = GLX_RGBA_TYPE;
487 *reset = __DRI_CTX_RESET_NO_NOTIFICATION;
488 *release = __DRI_CTX_RELEASE_BEHAVIOR_FLUSH;
489 *flags = 0;
490 *api = __DRI_API_OPENGL;
491
492 if (num_attribs == 0) {
493 return true;
494 }
495
496 /* This is actually an internal error, but what the heck.
497 */
498 if (attribs == NULL) {
499 *error = __DRI_CTX_ERROR_UNKNOWN_ATTRIBUTE;
500 return false;
501 }
502
503 for (i = 0; i < num_attribs; i++) {
504 switch (attribs[i * 2]) {
505 case GLX_CONTEXT_MAJOR_VERSION_ARB:
506 *major_ver = attribs[i * 2 + 1];
507 break;
508 case GLX_CONTEXT_MINOR_VERSION_ARB:
509 *minor_ver = attribs[i * 2 + 1];
510 break;
511 case GLX_CONTEXT_FLAGS_ARB:
512 *flags = attribs[i * 2 + 1];
513 break;
514 case GLX_CONTEXT_PROFILE_MASK_ARB:
515 profile = attribs[i * 2 + 1];
516 got_profile = true;
517 break;
518 case GLX_RENDER_TYPE:
519 *render_type = attribs[i * 2 + 1];
520 break;
521 case GLX_CONTEXT_RESET_NOTIFICATION_STRATEGY_ARB:
522 switch (attribs[i * 2 + 1]) {
523 case GLX_NO_RESET_NOTIFICATION_ARB:
524 *reset = __DRI_CTX_RESET_NO_NOTIFICATION;
525 break;
526 case GLX_LOSE_CONTEXT_ON_RESET_ARB:
527 *reset = __DRI_CTX_RESET_LOSE_CONTEXT;
528 break;
529 default:
530 *error = __DRI_CTX_ERROR_UNKNOWN_ATTRIBUTE;
531 return false;
532 }
533 break;
534 case GLX_CONTEXT_RELEASE_BEHAVIOR_ARB:
535 switch (attribs[i * 2 + 1]) {
536 case GLX_CONTEXT_RELEASE_BEHAVIOR_NONE_ARB:
537 *release = __DRI_CTX_RELEASE_BEHAVIOR_NONE;
538 break;
539 case GLX_CONTEXT_RELEASE_BEHAVIOR_FLUSH_ARB:
540 *release = __DRI_CTX_RELEASE_BEHAVIOR_FLUSH;
541 break;
542 default:
543 *error = __DRI_CTX_ERROR_UNKNOWN_ATTRIBUTE;
544 return false;
545 }
546 break;
547 default:
548 /* If an unknown attribute is received, fail.
549 */
550 *error = __DRI_CTX_ERROR_UNKNOWN_ATTRIBUTE;
551 return false;
552 }
553 }
554
555 if (!got_profile) {
556 if (*major_ver > 3 || (*major_ver == 3 && *minor_ver >= 2))
557 *api = __DRI_API_OPENGL_CORE;
558 } else {
559 switch (profile) {
560 case GLX_CONTEXT_CORE_PROFILE_BIT_ARB:
561 /* There are no profiles before OpenGL 3.2. The
562 * GLX_ARB_create_context_profile spec says:
563 *
564 * "If the requested OpenGL version is less than 3.2,
565 * GLX_CONTEXT_PROFILE_MASK_ARB is ignored and the functionality
566 * of the context is determined solely by the requested version."
567 */
568 *api = (*major_ver > 3 || (*major_ver == 3 && *minor_ver >= 2))
569 ? __DRI_API_OPENGL_CORE : __DRI_API_OPENGL;
570 break;
571 case GLX_CONTEXT_COMPATIBILITY_PROFILE_BIT_ARB:
572 *api = __DRI_API_OPENGL;
573 break;
574 case GLX_CONTEXT_ES_PROFILE_BIT_EXT:
575 if (*major_ver >= 3)
576 *api = __DRI_API_GLES3;
577 else if (*major_ver == 2 && *minor_ver == 0)
578 *api = __DRI_API_GLES2;
579 else if (*major_ver == 1 && *minor_ver < 2)
580 *api = __DRI_API_GLES;
581 else {
582 *error = __DRI_CTX_ERROR_BAD_API;
583 return false;
584 }
585 break;
586 default:
587 *error = __DRI_CTX_ERROR_BAD_API;
588 return false;
589 }
590 }
591
592 /* Unknown flag value.
593 */
594 if (*flags & ~(__DRI_CTX_FLAG_DEBUG | __DRI_CTX_FLAG_FORWARD_COMPATIBLE
595 | __DRI_CTX_FLAG_ROBUST_BUFFER_ACCESS)) {
596 *error = __DRI_CTX_ERROR_UNKNOWN_FLAG;
597 return false;
598 }
599
600 /* There are no forward-compatible contexts before OpenGL 3.0. The
601 * GLX_ARB_create_context spec says:
602 *
603 * "Forward-compatible contexts are defined only for OpenGL versions
604 * 3.0 and later."
605 */
606 if (*major_ver < 3 && (*flags & __DRI_CTX_FLAG_FORWARD_COMPATIBLE) != 0) {
607 *error = __DRI_CTX_ERROR_BAD_FLAG;
608 return false;
609 }
610
611 if (*major_ver >= 3 && *render_type == GLX_COLOR_INDEX_TYPE) {
612 *error = __DRI_CTX_ERROR_BAD_FLAG;
613 return false;
614 }
615
616 *error = __DRI_CTX_ERROR_SUCCESS;
617 return true;
618 }
619
620 #endif /* GLX_DIRECT_RENDERING */