1 //========================================================================
2 // GLFW 3.5 GLX - www.glfw.org
3 //------------------------------------------------------------------------
4 // Copyright (c) 2002-2006 Marcus Geelnard
5 // Copyright (c) 2006-2019 Camilla Löwy <elmindreda@glfw.org>
6 //
7 // This software is provided 'as-is', without any express or implied
8 // warranty. In no event will the authors be held liable for any damages
9 // arising from the use of this software.
10 //
11 // Permission is granted to anyone to use this software for any purpose,
12 // including commercial applications, and to alter it and redistribute it
13 // freely, subject to the following restrictions:
14 //
15 // 1. The origin of this software must not be misrepresented; you must not
16 // claim that you wrote the original software. If you use this software
17 // in a product, an acknowledgment in the product documentation would
18 // be appreciated but is not required.
19 //
20 // 2. Altered source versions must be plainly marked as such, and must not
21 // be misrepresented as being the original software.
22 //
23 // 3. This notice may not be removed or altered from any source
24 // distribution.
25 //
26 //========================================================================
27
28 #include "internal.h"
29
30 #if defined(_GLFW_X11)
31
32 #include <string.h>
33 #include <stdlib.h>
34 #include <assert.h>
35
36 #ifndef GLXBadProfileARB
37 #define GLXBadProfileARB 13
38 #endif
39
40
41 // Returns the specified attribute of the specified GLXFBConfig
42 //
getGLXFBConfigAttrib(GLXFBConfig fbconfig,int attrib)43 static int getGLXFBConfigAttrib(GLXFBConfig fbconfig, int attrib)
44 {
45 int value;
46 glXGetFBConfigAttrib(_glfw.x11.display, fbconfig, attrib, &value);
47 return value;
48 }
49
50 // Return the GLXFBConfig most closely matching the specified hints
51 //
chooseGLXFBConfig(const _GLFWfbconfig * desired,GLXFBConfig * result)52 static GLFWbool chooseGLXFBConfig(const _GLFWfbconfig* desired,
53 GLXFBConfig* result)
54 {
55 GLXFBConfig* nativeConfigs;
56 _GLFWfbconfig* usableConfigs;
57 const _GLFWfbconfig* closest;
58 int nativeCount, usableCount;
59 const char* vendor;
60 GLFWbool trustWindowBit = GLFW_TRUE;
61
62 // HACK: This is a (hopefully temporary) workaround for Chromium
63 // (VirtualBox GL) not setting the window bit on any GLXFBConfigs
64 vendor = glXGetClientString(_glfw.x11.display, GLX_VENDOR);
65 if (vendor && strcmp(vendor, "Chromium") == 0)
66 trustWindowBit = GLFW_FALSE;
67
68 nativeConfigs =
69 glXGetFBConfigs(_glfw.x11.display, _glfw.x11.screen, &nativeCount);
70 if (!nativeConfigs || !nativeCount)
71 {
72 _glfwInputError(GLFW_API_UNAVAILABLE, "GLX: No GLXFBConfigs returned");
73 return GLFW_FALSE;
74 }
75
76 usableConfigs = _glfw_calloc(nativeCount, sizeof(_GLFWfbconfig));
77 usableCount = 0;
78
79 for (int i = 0; i < nativeCount; i++)
80 {
81 const GLXFBConfig n = nativeConfigs[i];
82 _GLFWfbconfig* u = usableConfigs + usableCount;
83
84 // Only consider RGBA GLXFBConfigs
85 if (!(getGLXFBConfigAttrib(n, GLX_RENDER_TYPE) & GLX_RGBA_BIT))
86 continue;
87
88 // Only consider window GLXFBConfigs
89 if (!(getGLXFBConfigAttrib(n, GLX_DRAWABLE_TYPE) & GLX_WINDOW_BIT))
90 {
91 if (trustWindowBit)
92 continue;
93 }
94
95 if (getGLXFBConfigAttrib(n, GLX_DOUBLEBUFFER) != desired->doublebuffer)
96 continue;
97
98 if (desired->transparent)
99 {
100 XVisualInfo* vi = glXGetVisualFromFBConfig(_glfw.x11.display, n);
101 if (vi)
102 {
103 u->transparent = _glfwIsVisualTransparentX11(vi->visual);
104 XFree(vi);
105 }
106 }
107
108 u->redBits = getGLXFBConfigAttrib(n, GLX_RED_SIZE);
109 u->greenBits = getGLXFBConfigAttrib(n, GLX_GREEN_SIZE);
110 u->blueBits = getGLXFBConfigAttrib(n, GLX_BLUE_SIZE);
111
112 u->alphaBits = getGLXFBConfigAttrib(n, GLX_ALPHA_SIZE);
113 u->depthBits = getGLXFBConfigAttrib(n, GLX_DEPTH_SIZE);
114 u->stencilBits = getGLXFBConfigAttrib(n, GLX_STENCIL_SIZE);
115
116 u->accumRedBits = getGLXFBConfigAttrib(n, GLX_ACCUM_RED_SIZE);
117 u->accumGreenBits = getGLXFBConfigAttrib(n, GLX_ACCUM_GREEN_SIZE);
118 u->accumBlueBits = getGLXFBConfigAttrib(n, GLX_ACCUM_BLUE_SIZE);
119 u->accumAlphaBits = getGLXFBConfigAttrib(n, GLX_ACCUM_ALPHA_SIZE);
120
121 u->auxBuffers = getGLXFBConfigAttrib(n, GLX_AUX_BUFFERS);
122
123 if (getGLXFBConfigAttrib(n, GLX_STEREO))
124 u->stereo = GLFW_TRUE;
125
126 if (_glfw.glx.ARB_multisample)
127 u->samples = getGLXFBConfigAttrib(n, GLX_SAMPLES);
128
129 if (_glfw.glx.ARB_framebuffer_sRGB || _glfw.glx.EXT_framebuffer_sRGB)
130 u->sRGB = getGLXFBConfigAttrib(n, GLX_FRAMEBUFFER_SRGB_CAPABLE_ARB);
131
132 u->handle = (uintptr_t) n;
133 usableCount++;
134 }
135
136 closest = _glfwChooseFBConfig(desired, usableConfigs, usableCount);
137 if (closest)
138 *result = (GLXFBConfig) closest->handle;
139
140 XFree(nativeConfigs);
141 _glfw_free(usableConfigs);
142
143 return closest != NULL;
144 }
145
146 // Create the OpenGL context using legacy API
147 //
createLegacyContextGLX(_GLFWwindow * window,GLXFBConfig fbconfig,GLXContext share)148 static GLXContext createLegacyContextGLX(_GLFWwindow* window,
149 GLXFBConfig fbconfig,
150 GLXContext share)
151 {
152 return glXCreateNewContext(_glfw.x11.display,
153 fbconfig,
154 GLX_RGBA_TYPE,
155 share,
156 True);
157 }
158
makeContextCurrentGLX(_GLFWwindow * window)159 static void makeContextCurrentGLX(_GLFWwindow* window)
160 {
161 if (window)
162 {
163 if (!glXMakeCurrent(_glfw.x11.display,
164 window->context.glx.window,
165 window->context.glx.handle))
166 {
167 _glfwInputError(GLFW_PLATFORM_ERROR,
168 "GLX: Failed to make context current");
169 return;
170 }
171 }
172 else
173 {
174 if (!glXMakeCurrent(_glfw.x11.display, None, NULL))
175 {
176 _glfwInputError(GLFW_PLATFORM_ERROR,
177 "GLX: Failed to clear current context");
178 return;
179 }
180 }
181
182 _glfwPlatformSetTls(&_glfw.contextSlot, window);
183 }
184
swapBuffersGLX(_GLFWwindow * window)185 static void swapBuffersGLX(_GLFWwindow* window)
186 {
187 glXSwapBuffers(_glfw.x11.display, window->context.glx.window);
188 }
189
swapIntervalGLX(int interval)190 static void swapIntervalGLX(int interval)
191 {
192 _GLFWwindow* window = _glfwPlatformGetTls(&_glfw.contextSlot);
193 assert(window != NULL);
194
195 if (_glfw.glx.EXT_swap_control)
196 {
197 _glfw.glx.SwapIntervalEXT(_glfw.x11.display,
198 window->context.glx.window,
199 interval);
200 }
201 else if (_glfw.glx.MESA_swap_control)
202 _glfw.glx.SwapIntervalMESA(interval);
203 else if (_glfw.glx.SGI_swap_control)
204 {
205 if (interval > 0)
206 _glfw.glx.SwapIntervalSGI(interval);
207 }
208 }
209
extensionSupportedGLX(const char * extension)210 static int extensionSupportedGLX(const char* extension)
211 {
212 const char* extensions =
213 glXQueryExtensionsString(_glfw.x11.display, _glfw.x11.screen);
214 if (extensions)
215 {
216 if (_glfwStringInExtensionString(extension, extensions))
217 return GLFW_TRUE;
218 }
219
220 return GLFW_FALSE;
221 }
222
getProcAddressGLX(const char * procname)223 static GLFWglproc getProcAddressGLX(const char* procname)
224 {
225 if (_glfw.glx.GetProcAddress)
226 return _glfw.glx.GetProcAddress((const GLubyte*) procname);
227 else if (_glfw.glx.GetProcAddressARB)
228 return _glfw.glx.GetProcAddressARB((const GLubyte*) procname);
229 else
230 {
231 // NOTE: glvnd provides GLX 1.4, so this can only happen with libGL
232 return _glfwPlatformGetModuleSymbol(_glfw.glx.handle, procname);
233 }
234 }
235
destroyContextGLX(_GLFWwindow * window)236 static void destroyContextGLX(_GLFWwindow* window)
237 {
238 if (window->context.glx.window)
239 {
240 glXDestroyWindow(_glfw.x11.display, window->context.glx.window);
241 window->context.glx.window = None;
242 }
243
244 if (window->context.glx.handle)
245 {
246 glXDestroyContext(_glfw.x11.display, window->context.glx.handle);
247 window->context.glx.handle = NULL;
248 }
249 }
250
251
252 //////////////////////////////////////////////////////////////////////////
253 ////// GLFW internal API //////
254 //////////////////////////////////////////////////////////////////////////
255
256 // Initialize GLX
257 //
_glfwInitGLX(void)258 GLFWbool _glfwInitGLX(void)
259 {
260 const char* sonames[] =
261 {
262 #if defined(_GLFW_GLX_LIBRARY)
263 _GLFW_GLX_LIBRARY,
264 #elif defined(__CYGWIN__)
265 "libGL-1.so",
266 #elif defined(__OpenBSD__) || defined(__NetBSD__)
267 "libGL.so",
268 #else
269 "libGLX.so.0",
270 "libGL.so.1",
271 "libGL.so",
272 #endif
273 NULL
274 };
275
276 if (_glfw.glx.handle)
277 return GLFW_TRUE;
278
279 for (int i = 0; sonames[i]; i++)
280 {
281 _glfw.glx.handle = _glfwPlatformLoadModule(sonames[i]);
282 if (_glfw.glx.handle)
283 break;
284 }
285
286 if (!_glfw.glx.handle)
287 {
288 _glfwInputError(GLFW_API_UNAVAILABLE, "GLX: Failed to load GLX");
289 return GLFW_FALSE;
290 }
291
292 _glfw.glx.GetFBConfigs = (PFNGLXGETFBCONFIGSPROC)
293 _glfwPlatformGetModuleSymbol(_glfw.glx.handle, "glXGetFBConfigs");
294 _glfw.glx.GetFBConfigAttrib = (PFNGLXGETFBCONFIGATTRIBPROC)
295 _glfwPlatformGetModuleSymbol(_glfw.glx.handle, "glXGetFBConfigAttrib");
296 _glfw.glx.GetClientString = (PFNGLXGETCLIENTSTRINGPROC)
297 _glfwPlatformGetModuleSymbol(_glfw.glx.handle, "glXGetClientString");
298 _glfw.glx.QueryExtension = (PFNGLXQUERYEXTENSIONPROC)
299 _glfwPlatformGetModuleSymbol(_glfw.glx.handle, "glXQueryExtension");
300 _glfw.glx.QueryVersion = (PFNGLXQUERYVERSIONPROC)
301 _glfwPlatformGetModuleSymbol(_glfw.glx.handle, "glXQueryVersion");
302 _glfw.glx.DestroyContext = (PFNGLXDESTROYCONTEXTPROC)
303 _glfwPlatformGetModuleSymbol(_glfw.glx.handle, "glXDestroyContext");
304 _glfw.glx.MakeCurrent = (PFNGLXMAKECURRENTPROC)
305 _glfwPlatformGetModuleSymbol(_glfw.glx.handle, "glXMakeCurrent");
306 _glfw.glx.SwapBuffers = (PFNGLXSWAPBUFFERSPROC)
307 _glfwPlatformGetModuleSymbol(_glfw.glx.handle, "glXSwapBuffers");
308 _glfw.glx.QueryExtensionsString = (PFNGLXQUERYEXTENSIONSSTRINGPROC)
309 _glfwPlatformGetModuleSymbol(_glfw.glx.handle, "glXQueryExtensionsString");
310 _glfw.glx.CreateNewContext = (PFNGLXCREATENEWCONTEXTPROC)
311 _glfwPlatformGetModuleSymbol(_glfw.glx.handle, "glXCreateNewContext");
312 _glfw.glx.CreateWindow = (PFNGLXCREATEWINDOWPROC)
313 _glfwPlatformGetModuleSymbol(_glfw.glx.handle, "glXCreateWindow");
314 _glfw.glx.DestroyWindow = (PFNGLXDESTROYWINDOWPROC)
315 _glfwPlatformGetModuleSymbol(_glfw.glx.handle, "glXDestroyWindow");
316 _glfw.glx.GetVisualFromFBConfig = (PFNGLXGETVISUALFROMFBCONFIGPROC)
317 _glfwPlatformGetModuleSymbol(_glfw.glx.handle, "glXGetVisualFromFBConfig");
318
319 if (!_glfw.glx.GetFBConfigs ||
320 !_glfw.glx.GetFBConfigAttrib ||
321 !_glfw.glx.GetClientString ||
322 !_glfw.glx.QueryExtension ||
323 !_glfw.glx.QueryVersion ||
324 !_glfw.glx.DestroyContext ||
325 !_glfw.glx.MakeCurrent ||
326 !_glfw.glx.SwapBuffers ||
327 !_glfw.glx.QueryExtensionsString ||
328 !_glfw.glx.CreateNewContext ||
329 !_glfw.glx.CreateWindow ||
330 !_glfw.glx.DestroyWindow ||
331 !_glfw.glx.GetVisualFromFBConfig)
332 {
333 _glfwInputError(GLFW_PLATFORM_ERROR,
334 "GLX: Failed to load required entry points");
335 return GLFW_FALSE;
336 }
337
338 // NOTE: Unlike GLX 1.3 entry points these are not required to be present
339 _glfw.glx.GetProcAddress = (PFNGLXGETPROCADDRESSPROC)
340 _glfwPlatformGetModuleSymbol(_glfw.glx.handle, "glXGetProcAddress");
341 _glfw.glx.GetProcAddressARB = (PFNGLXGETPROCADDRESSPROC)
342 _glfwPlatformGetModuleSymbol(_glfw.glx.handle, "glXGetProcAddressARB");
343
344 if (!glXQueryExtension(_glfw.x11.display,
345 &_glfw.glx.errorBase,
346 &_glfw.glx.eventBase))
347 {
348 _glfwInputError(GLFW_API_UNAVAILABLE, "GLX: GLX extension not found");
349 return GLFW_FALSE;
350 }
351
352 if (!glXQueryVersion(_glfw.x11.display, &_glfw.glx.major, &_glfw.glx.minor))
353 {
354 _glfwInputError(GLFW_API_UNAVAILABLE,
355 "GLX: Failed to query GLX version");
356 return GLFW_FALSE;
357 }
358
359 if (_glfw.glx.major == 1 && _glfw.glx.minor < 3)
360 {
361 _glfwInputError(GLFW_API_UNAVAILABLE,
362 "GLX: GLX version 1.3 is required");
363 return GLFW_FALSE;
364 }
365
366 if (extensionSupportedGLX("GLX_EXT_swap_control"))
367 {
368 _glfw.glx.SwapIntervalEXT = (PFNGLXSWAPINTERVALEXTPROC)
369 getProcAddressGLX("glXSwapIntervalEXT");
370
371 if (_glfw.glx.SwapIntervalEXT)
372 _glfw.glx.EXT_swap_control = GLFW_TRUE;
373 }
374
375 if (extensionSupportedGLX("GLX_SGI_swap_control"))
376 {
377 _glfw.glx.SwapIntervalSGI = (PFNGLXSWAPINTERVALSGIPROC)
378 getProcAddressGLX("glXSwapIntervalSGI");
379
380 if (_glfw.glx.SwapIntervalSGI)
381 _glfw.glx.SGI_swap_control = GLFW_TRUE;
382 }
383
384 if (extensionSupportedGLX("GLX_MESA_swap_control"))
385 {
386 _glfw.glx.SwapIntervalMESA = (PFNGLXSWAPINTERVALMESAPROC)
387 getProcAddressGLX("glXSwapIntervalMESA");
388
389 if (_glfw.glx.SwapIntervalMESA)
390 _glfw.glx.MESA_swap_control = GLFW_TRUE;
391 }
392
393 if (extensionSupportedGLX("GLX_ARB_multisample"))
394 _glfw.glx.ARB_multisample = GLFW_TRUE;
395
396 if (extensionSupportedGLX("GLX_ARB_framebuffer_sRGB"))
397 _glfw.glx.ARB_framebuffer_sRGB = GLFW_TRUE;
398
399 if (extensionSupportedGLX("GLX_EXT_framebuffer_sRGB"))
400 _glfw.glx.EXT_framebuffer_sRGB = GLFW_TRUE;
401
402 if (extensionSupportedGLX("GLX_ARB_create_context"))
403 {
404 _glfw.glx.CreateContextAttribsARB = (PFNGLXCREATECONTEXTATTRIBSARBPROC)
405 getProcAddressGLX("glXCreateContextAttribsARB");
406
407 if (_glfw.glx.CreateContextAttribsARB)
408 _glfw.glx.ARB_create_context = GLFW_TRUE;
409 }
410
411 if (extensionSupportedGLX("GLX_ARB_create_context_robustness"))
412 _glfw.glx.ARB_create_context_robustness = GLFW_TRUE;
413
414 if (extensionSupportedGLX("GLX_ARB_create_context_profile"))
415 _glfw.glx.ARB_create_context_profile = GLFW_TRUE;
416
417 if (extensionSupportedGLX("GLX_EXT_create_context_es2_profile"))
418 _glfw.glx.EXT_create_context_es2_profile = GLFW_TRUE;
419
420 if (extensionSupportedGLX("GLX_ARB_create_context_no_error"))
421 _glfw.glx.ARB_create_context_no_error = GLFW_TRUE;
422
423 if (extensionSupportedGLX("GLX_ARB_context_flush_control"))
424 _glfw.glx.ARB_context_flush_control = GLFW_TRUE;
425
426 return GLFW_TRUE;
427 }
428
429 // Terminate GLX
430 //
_glfwTerminateGLX(void)431 void _glfwTerminateGLX(void)
432 {
433 // NOTE: This function must not call any X11 functions, as it is called
434 // after XCloseDisplay (see _glfwTerminateX11 for details)
435
436 if (_glfw.glx.handle)
437 {
438 _glfwPlatformFreeModule(_glfw.glx.handle);
439 _glfw.glx.handle = NULL;
440 }
441 }
442
443 #define SET_ATTRIB(a, v) \
444 { \
445 assert(((size_t) index + 1) < sizeof(attribs) / sizeof(attribs[0])); \
446 attribs[index++] = a; \
447 attribs[index++] = v; \
448 }
449
450 // Create the OpenGL or OpenGL ES context
451 //
_glfwCreateContextGLX(_GLFWwindow * window,const _GLFWctxconfig * ctxconfig,const _GLFWfbconfig * fbconfig)452 GLFWbool _glfwCreateContextGLX(_GLFWwindow* window,
453 const _GLFWctxconfig* ctxconfig,
454 const _GLFWfbconfig* fbconfig)
455 {
456 int attribs[40];
457 GLXFBConfig native = NULL;
458 GLXContext share = NULL;
459
460 if (ctxconfig->share)
461 share = ctxconfig->share->context.glx.handle;
462
463 if (!chooseGLXFBConfig(fbconfig, &native))
464 {
465 _glfwInputError(GLFW_FORMAT_UNAVAILABLE,
466 "GLX: Failed to find a suitable GLXFBConfig");
467 return GLFW_FALSE;
468 }
469
470 if (ctxconfig->client == GLFW_OPENGL_ES_API)
471 {
472 if (!_glfw.glx.ARB_create_context ||
473 !_glfw.glx.ARB_create_context_profile ||
474 !_glfw.glx.EXT_create_context_es2_profile)
475 {
476 _glfwInputError(GLFW_API_UNAVAILABLE,
477 "GLX: OpenGL ES requested but GLX_EXT_create_context_es2_profile is unavailable");
478 return GLFW_FALSE;
479 }
480 }
481
482 if (ctxconfig->forward)
483 {
484 if (!_glfw.glx.ARB_create_context)
485 {
486 _glfwInputError(GLFW_VERSION_UNAVAILABLE,
487 "GLX: Forward compatibility requested but GLX_ARB_create_context_profile is unavailable");
488 return GLFW_FALSE;
489 }
490 }
491
492 if (ctxconfig->profile)
493 {
494 if (!_glfw.glx.ARB_create_context ||
495 !_glfw.glx.ARB_create_context_profile)
496 {
497 _glfwInputError(GLFW_VERSION_UNAVAILABLE,
498 "GLX: An OpenGL profile requested but GLX_ARB_create_context_profile is unavailable");
499 return GLFW_FALSE;
500 }
501 }
502
503 _glfwGrabErrorHandlerX11();
504
505 if (_glfw.glx.ARB_create_context)
506 {
507 int index = 0, mask = 0, flags = 0;
508
509 if (ctxconfig->client == GLFW_OPENGL_API)
510 {
511 if (ctxconfig->forward)
512 flags |= GLX_CONTEXT_FORWARD_COMPATIBLE_BIT_ARB;
513
514 if (ctxconfig->profile == GLFW_OPENGL_CORE_PROFILE)
515 mask |= GLX_CONTEXT_CORE_PROFILE_BIT_ARB;
516 else if (ctxconfig->profile == GLFW_OPENGL_COMPAT_PROFILE)
517 mask |= GLX_CONTEXT_COMPATIBILITY_PROFILE_BIT_ARB;
518 }
519 else
520 mask |= GLX_CONTEXT_ES2_PROFILE_BIT_EXT;
521
522 if (ctxconfig->debug)
523 flags |= GLX_CONTEXT_DEBUG_BIT_ARB;
524
525 if (ctxconfig->robustness)
526 {
527 if (_glfw.glx.ARB_create_context_robustness)
528 {
529 if (ctxconfig->robustness == GLFW_NO_RESET_NOTIFICATION)
530 {
531 SET_ATTRIB(GLX_CONTEXT_RESET_NOTIFICATION_STRATEGY_ARB,
532 GLX_NO_RESET_NOTIFICATION_ARB);
533 }
534 else if (ctxconfig->robustness == GLFW_LOSE_CONTEXT_ON_RESET)
535 {
536 SET_ATTRIB(GLX_CONTEXT_RESET_NOTIFICATION_STRATEGY_ARB,
537 GLX_LOSE_CONTEXT_ON_RESET_ARB);
538 }
539
540 flags |= GLX_CONTEXT_ROBUST_ACCESS_BIT_ARB;
541 }
542 }
543
544 if (ctxconfig->release)
545 {
546 if (_glfw.glx.ARB_context_flush_control)
547 {
548 if (ctxconfig->release == GLFW_RELEASE_BEHAVIOR_NONE)
549 {
550 SET_ATTRIB(GLX_CONTEXT_RELEASE_BEHAVIOR_ARB,
551 GLX_CONTEXT_RELEASE_BEHAVIOR_NONE_ARB);
552 }
553 else if (ctxconfig->release == GLFW_RELEASE_BEHAVIOR_FLUSH)
554 {
555 SET_ATTRIB(GLX_CONTEXT_RELEASE_BEHAVIOR_ARB,
556 GLX_CONTEXT_RELEASE_BEHAVIOR_FLUSH_ARB);
557 }
558 }
559 }
560
561 if (ctxconfig->noerror)
562 {
563 if (_glfw.glx.ARB_create_context_no_error)
564 SET_ATTRIB(GLX_CONTEXT_OPENGL_NO_ERROR_ARB, GLFW_TRUE);
565 }
566
567 // NOTE: Only request an explicitly versioned context when necessary, as
568 // explicitly requesting version 1.0 does not always return the
569 // highest version supported by the driver
570 if (ctxconfig->major != 1 || ctxconfig->minor != 0)
571 {
572 SET_ATTRIB(GLX_CONTEXT_MAJOR_VERSION_ARB, ctxconfig->major);
573 SET_ATTRIB(GLX_CONTEXT_MINOR_VERSION_ARB, ctxconfig->minor);
574 }
575
576 if (mask)
577 SET_ATTRIB(GLX_CONTEXT_PROFILE_MASK_ARB, mask);
578
579 if (flags)
580 SET_ATTRIB(GLX_CONTEXT_FLAGS_ARB, flags);
581
582 SET_ATTRIB(None, None);
583
584 window->context.glx.handle =
585 _glfw.glx.CreateContextAttribsARB(_glfw.x11.display,
586 native,
587 share,
588 True,
589 attribs);
590
591 // HACK: This is a fallback for broken versions of the Mesa
592 // implementation of GLX_ARB_create_context_profile that fail
593 // default 1.0 context creation with a GLXBadProfileARB error in
594 // violation of the extension spec
595 if (!window->context.glx.handle)
596 {
597 if (_glfw.x11.errorCode == _glfw.glx.errorBase + GLXBadProfileARB &&
598 ctxconfig->client == GLFW_OPENGL_API &&
599 ctxconfig->profile == GLFW_OPENGL_ANY_PROFILE &&
600 ctxconfig->forward == GLFW_FALSE)
601 {
602 window->context.glx.handle =
603 createLegacyContextGLX(window, native, share);
604 }
605 }
606 }
607 else
608 {
609 window->context.glx.handle =
610 createLegacyContextGLX(window, native, share);
611 }
612
613 _glfwReleaseErrorHandlerX11();
614
615 if (!window->context.glx.handle)
616 {
617 _glfwInputErrorX11(GLFW_VERSION_UNAVAILABLE, "GLX: Failed to create context");
618 return GLFW_FALSE;
619 }
620
621 window->context.glx.window =
622 glXCreateWindow(_glfw.x11.display, native, window->x11.handle, NULL);
623 if (!window->context.glx.window)
624 {
625 _glfwInputError(GLFW_PLATFORM_ERROR, "GLX: Failed to create window");
626 return GLFW_FALSE;
627 }
628
629 window->context.makeCurrent = makeContextCurrentGLX;
630 window->context.swapBuffers = swapBuffersGLX;
631 window->context.swapInterval = swapIntervalGLX;
632 window->context.extensionSupported = extensionSupportedGLX;
633 window->context.getProcAddress = getProcAddressGLX;
634 window->context.destroy = destroyContextGLX;
635
636 return GLFW_TRUE;
637 }
638
639 #undef SET_ATTRIB
640
641 // Returns the Visual and depth of the chosen GLXFBConfig
642 //
_glfwChooseVisualGLX(const _GLFWwndconfig * wndconfig,const _GLFWctxconfig * ctxconfig,const _GLFWfbconfig * fbconfig,Visual ** visual,int * depth)643 GLFWbool _glfwChooseVisualGLX(const _GLFWwndconfig* wndconfig,
644 const _GLFWctxconfig* ctxconfig,
645 const _GLFWfbconfig* fbconfig,
646 Visual** visual, int* depth)
647 {
648 GLXFBConfig native;
649 XVisualInfo* result;
650
651 if (!chooseGLXFBConfig(fbconfig, &native))
652 {
653 _glfwInputError(GLFW_FORMAT_UNAVAILABLE,
654 "GLX: Failed to find a suitable GLXFBConfig");
655 return GLFW_FALSE;
656 }
657
658 result = glXGetVisualFromFBConfig(_glfw.x11.display, native);
659 if (!result)
660 {
661 _glfwInputError(GLFW_PLATFORM_ERROR,
662 "GLX: Failed to retrieve Visual for GLXFBConfig");
663 return GLFW_FALSE;
664 }
665
666 *visual = result->visual;
667 *depth = result->depth;
668
669 XFree(result);
670 return GLFW_TRUE;
671 }
672
673
674 //////////////////////////////////////////////////////////////////////////
675 ////// GLFW native API //////
676 //////////////////////////////////////////////////////////////////////////
677
glfwGetGLXContext(GLFWwindow * handle)678 GLFWAPI GLXContext glfwGetGLXContext(GLFWwindow* handle)
679 {
680 _GLFW_REQUIRE_INIT_OR_RETURN(NULL);
681
682 if (_glfw.platform.platformID != GLFW_PLATFORM_X11)
683 {
684 _glfwInputError(GLFW_PLATFORM_UNAVAILABLE, "GLX: Platform not initialized");
685 return NULL;
686 }
687
688 _GLFWwindow* window = (_GLFWwindow*) handle;
689 assert(window != NULL);
690
691 if (window->context.source != GLFW_NATIVE_CONTEXT_API)
692 {
693 _glfwInputError(GLFW_NO_WINDOW_CONTEXT, NULL);
694 return NULL;
695 }
696
697 return window->context.glx.handle;
698 }
699
glfwGetGLXWindow(GLFWwindow * handle)700 GLFWAPI GLXWindow glfwGetGLXWindow(GLFWwindow* handle)
701 {
702 _GLFW_REQUIRE_INIT_OR_RETURN(None);
703
704 if (_glfw.platform.platformID != GLFW_PLATFORM_X11)
705 {
706 _glfwInputError(GLFW_PLATFORM_UNAVAILABLE, "GLX: Platform not initialized");
707 return None;
708 }
709
710 _GLFWwindow* window = (_GLFWwindow*) handle;
711 assert(window != NULL);
712
713 if (window->context.source != GLFW_NATIVE_CONTEXT_API)
714 {
715 _glfwInputError(GLFW_NO_WINDOW_CONTEXT, NULL);
716 return None;
717 }
718
719 return window->context.glx.window;
720 }
721
722 #endif // _GLFW_X11
723
724