1 //========================================================================
2 // GLFW 3.2 GLX - www.glfw.org
3 //------------------------------------------------------------------------
4 // Copyright (c) 2002-2006 Marcus Geelnard
5 // Copyright (c) 2006-2016 Camilla Berglund <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 #include <string.h>
31 #include <stdlib.h>
32 #include <assert.h>
33
34 #ifndef GLXBadProfileARB
35 #define GLXBadProfileARB 13
36 #endif
37
38
39 // Returns the specified attribute of the specified GLXFBConfig
40 //
getGLXFBConfigAttrib(GLXFBConfig fbconfig,int attrib)41 static int getGLXFBConfigAttrib(GLXFBConfig fbconfig, int attrib)
42 {
43 int value;
44 glXGetFBConfigAttrib(_glfw.x11.display, fbconfig, attrib, &value);
45 return value;
46 }
47
48 // Return the GLXFBConfig most closely matching the specified hints
49 //
chooseGLXFBConfig(const _GLFWfbconfig * desired,GLXFBConfig * result)50 static GLFWbool chooseGLXFBConfig(const _GLFWfbconfig* desired, GLXFBConfig* result)
51 {
52 GLXFBConfig* nativeConfigs;
53 _GLFWfbconfig* usableConfigs;
54 const _GLFWfbconfig* closest;
55 int i, nativeCount, usableCount;
56 const char* vendor;
57 GLFWbool trustWindowBit = GLFW_TRUE;
58
59 // HACK: This is a (hopefully temporary) workaround for Chromium
60 // (VirtualBox GL) not setting the window bit on any GLXFBConfigs
61 vendor = glXGetClientString(_glfw.x11.display, GLX_VENDOR);
62 if (strcmp(vendor, "Chromium") == 0)
63 trustWindowBit = GLFW_FALSE;
64
65 nativeConfigs =
66 glXGetFBConfigs(_glfw.x11.display, _glfw.x11.screen, &nativeCount);
67 if (!nativeCount)
68 {
69 _glfwInputError(GLFW_API_UNAVAILABLE, "GLX: No GLXFBConfigs returned");
70 return GLFW_FALSE;
71 }
72
73 usableConfigs = calloc(nativeCount, sizeof(_GLFWfbconfig));
74 usableCount = 0;
75
76 for (i = 0; i < nativeCount; i++)
77 {
78 const GLXFBConfig n = nativeConfigs[i];
79 _GLFWfbconfig* u = usableConfigs + usableCount;
80
81 // Only consider RGBA GLXFBConfigs
82 if (!(getGLXFBConfigAttrib(n, GLX_RENDER_TYPE) & GLX_RGBA_BIT))
83 continue;
84
85 // Only consider window GLXFBConfigs
86 if (!(getGLXFBConfigAttrib(n, GLX_DRAWABLE_TYPE) & GLX_WINDOW_BIT))
87 {
88 if (trustWindowBit)
89 continue;
90 }
91
92 u->redBits = getGLXFBConfigAttrib(n, GLX_RED_SIZE);
93 u->greenBits = getGLXFBConfigAttrib(n, GLX_GREEN_SIZE);
94 u->blueBits = getGLXFBConfigAttrib(n, GLX_BLUE_SIZE);
95
96 u->alphaBits = getGLXFBConfigAttrib(n, GLX_ALPHA_SIZE);
97 u->depthBits = getGLXFBConfigAttrib(n, GLX_DEPTH_SIZE);
98 u->stencilBits = getGLXFBConfigAttrib(n, GLX_STENCIL_SIZE);
99
100 u->accumRedBits = getGLXFBConfigAttrib(n, GLX_ACCUM_RED_SIZE);
101 u->accumGreenBits = getGLXFBConfigAttrib(n, GLX_ACCUM_GREEN_SIZE);
102 u->accumBlueBits = getGLXFBConfigAttrib(n, GLX_ACCUM_BLUE_SIZE);
103 u->accumAlphaBits = getGLXFBConfigAttrib(n, GLX_ACCUM_ALPHA_SIZE);
104
105 u->auxBuffers = getGLXFBConfigAttrib(n, GLX_AUX_BUFFERS);
106
107 if (getGLXFBConfigAttrib(n, GLX_STEREO))
108 u->stereo = GLFW_TRUE;
109 if (getGLXFBConfigAttrib(n, GLX_DOUBLEBUFFER))
110 u->doublebuffer = GLFW_TRUE;
111
112 if (_glfw.glx.ARB_multisample)
113 u->samples = getGLXFBConfigAttrib(n, GLX_SAMPLES);
114
115 if (_glfw.glx.ARB_framebuffer_sRGB || _glfw.glx.EXT_framebuffer_sRGB)
116 u->sRGB = getGLXFBConfigAttrib(n, GLX_FRAMEBUFFER_SRGB_CAPABLE_ARB);
117
118 u->handle = (uintptr_t) n;
119 usableCount++;
120 }
121
122 closest = _glfwChooseFBConfig(desired, usableConfigs, usableCount);
123 if (closest)
124 *result = (GLXFBConfig) closest->handle;
125
126 XFree(nativeConfigs);
127 free(usableConfigs);
128
129 return closest != NULL;
130 }
131
132 // Create the OpenGL context using legacy API
133 //
createLegacyContextGLX(_GLFWwindow * window,GLXFBConfig fbconfig,GLXContext share)134 static GLXContext createLegacyContextGLX(_GLFWwindow* window,
135 GLXFBConfig fbconfig,
136 GLXContext share)
137 {
138 return glXCreateNewContext(_glfw.x11.display,
139 fbconfig,
140 GLX_RGBA_TYPE,
141 share,
142 True);
143 }
144
makeContextCurrentGLX(_GLFWwindow * window)145 static void makeContextCurrentGLX(_GLFWwindow* window)
146 {
147 if (window)
148 {
149 if (!glXMakeCurrent(_glfw.x11.display,
150 window->context.glx.window,
151 window->context.glx.handle))
152 {
153 _glfwInputError(GLFW_PLATFORM_ERROR,
154 "GLX: Failed to make context current");
155 return;
156 }
157 }
158 else
159 {
160 if (!glXMakeCurrent(_glfw.x11.display, None, NULL))
161 {
162 _glfwInputError(GLFW_PLATFORM_ERROR,
163 "GLX: Failed to clear current context");
164 return;
165 }
166 }
167
168 _glfwPlatformSetCurrentContext(window);
169 }
170
swapBuffersGLX(_GLFWwindow * window)171 static void swapBuffersGLX(_GLFWwindow* window)
172 {
173 glXSwapBuffers(_glfw.x11.display, window->context.glx.window);
174 }
175
swapIntervalGLX(int interval)176 static void swapIntervalGLX(int interval)
177 {
178 _GLFWwindow* window = _glfwPlatformGetCurrentContext();
179
180 if (_glfw.glx.EXT_swap_control)
181 {
182 _glfw.glx.SwapIntervalEXT(_glfw.x11.display,
183 window->context.glx.window,
184 interval);
185 }
186 else if (_glfw.glx.MESA_swap_control)
187 _glfw.glx.SwapIntervalMESA(interval);
188 else if (_glfw.glx.SGI_swap_control)
189 {
190 if (interval > 0)
191 _glfw.glx.SwapIntervalSGI(interval);
192 }
193 }
194
extensionSupportedGLX(const char * extension)195 static int extensionSupportedGLX(const char* extension)
196 {
197 const char* extensions =
198 glXQueryExtensionsString(_glfw.x11.display, _glfw.x11.screen);
199 if (extensions)
200 {
201 if (_glfwStringInExtensionString(extension, extensions))
202 return GLFW_TRUE;
203 }
204
205 return GLFW_FALSE;
206 }
207
getProcAddressGLX(const char * procname)208 static GLFWglproc getProcAddressGLX(const char* procname)
209 {
210 if (_glfw.glx.GetProcAddress)
211 return _glfw.glx.GetProcAddress((const GLubyte*) procname);
212 else if (_glfw.glx.GetProcAddressARB)
213 return _glfw.glx.GetProcAddressARB((const GLubyte*) procname);
214 else
215 return dlsym(_glfw.glx.handle, procname);
216 }
217
218 // Destroy the OpenGL context
219 //
destroyContextGLX(_GLFWwindow * window)220 static void destroyContextGLX(_GLFWwindow* window)
221 {
222 if (window->context.glx.window)
223 {
224 glXDestroyWindow(_glfw.x11.display, window->context.glx.window);
225 window->context.glx.window = None;
226 }
227
228 if (window->context.glx.handle)
229 {
230 glXDestroyContext(_glfw.x11.display, window->context.glx.handle);
231 window->context.glx.handle = NULL;
232 }
233 }
234
235
236 //////////////////////////////////////////////////////////////////////////
237 ////// GLFW internal API //////
238 //////////////////////////////////////////////////////////////////////////
239
240 // Initialize GLX
241 //
_glfwInitGLX(void)242 GLFWbool _glfwInitGLX(void)
243 {
244 int i;
245 const char* sonames[] =
246 {
247 #if defined(__CYGWIN__)
248 "libGL-1.so",
249 #else
250 "libGL.so.1",
251 "libGL.so",
252 #endif
253 NULL
254 };
255
256 if (_glfw.glx.handle)
257 return GLFW_TRUE;
258
259 for (i = 0; sonames[i]; i++)
260 {
261 _glfw.glx.handle = dlopen(sonames[i], RTLD_LAZY | RTLD_GLOBAL);
262 if (_glfw.glx.handle)
263 break;
264 }
265
266 if (!_glfw.glx.handle)
267 {
268 _glfwInputError(GLFW_API_UNAVAILABLE, "GLX: Failed to load GLX");
269 return GLFW_FALSE;
270 }
271
272 _glfw.glx.GetFBConfigs =
273 dlsym(_glfw.glx.handle, "glXGetFBConfigs");
274 _glfw.glx.GetFBConfigAttrib =
275 dlsym(_glfw.glx.handle, "glXGetFBConfigAttrib");
276 _glfw.glx.GetClientString =
277 dlsym(_glfw.glx.handle, "glXGetClientString");
278 _glfw.glx.QueryExtension =
279 dlsym(_glfw.glx.handle, "glXQueryExtension");
280 _glfw.glx.QueryVersion =
281 dlsym(_glfw.glx.handle, "glXQueryVersion");
282 _glfw.glx.DestroyContext =
283 dlsym(_glfw.glx.handle, "glXDestroyContext");
284 _glfw.glx.MakeCurrent =
285 dlsym(_glfw.glx.handle, "glXMakeCurrent");
286 _glfw.glx.SwapBuffers =
287 dlsym(_glfw.glx.handle, "glXSwapBuffers");
288 _glfw.glx.QueryExtensionsString =
289 dlsym(_glfw.glx.handle, "glXQueryExtensionsString");
290 _glfw.glx.CreateNewContext =
291 dlsym(_glfw.glx.handle, "glXCreateNewContext");
292 _glfw.glx.CreateWindow =
293 dlsym(_glfw.glx.handle, "glXCreateWindow");
294 _glfw.glx.DestroyWindow =
295 dlsym(_glfw.glx.handle, "glXDestroyWindow");
296 _glfw.glx.GetProcAddress =
297 dlsym(_glfw.glx.handle, "glXGetProcAddress");
298 _glfw.glx.GetProcAddressARB =
299 dlsym(_glfw.glx.handle, "glXGetProcAddressARB");
300 _glfw.glx.GetVisualFromFBConfig =
301 dlsym(_glfw.glx.handle, "glXGetVisualFromFBConfig");
302
303 if (!_glfw.glx.GetFBConfigs ||
304 !_glfw.glx.GetFBConfigAttrib ||
305 !_glfw.glx.GetClientString ||
306 !_glfw.glx.QueryExtension ||
307 !_glfw.glx.QueryVersion ||
308 !_glfw.glx.DestroyContext ||
309 !_glfw.glx.MakeCurrent ||
310 !_glfw.glx.SwapBuffers ||
311 !_glfw.glx.QueryExtensionsString ||
312 !_glfw.glx.CreateNewContext ||
313 !_glfw.glx.CreateWindow ||
314 !_glfw.glx.DestroyWindow ||
315 !_glfw.glx.GetProcAddress ||
316 !_glfw.glx.GetProcAddressARB ||
317 !_glfw.glx.GetVisualFromFBConfig)
318 {
319 _glfwInputError(GLFW_PLATFORM_ERROR,
320 "GLX: Failed to load required entry points");
321 return GLFW_FALSE;
322 }
323
324 if (!glXQueryExtension(_glfw.x11.display,
325 &_glfw.glx.errorBase,
326 &_glfw.glx.eventBase))
327 {
328 _glfwInputError(GLFW_API_UNAVAILABLE, "GLX: GLX extension not found");
329 return GLFW_FALSE;
330 }
331
332 if (!glXQueryVersion(_glfw.x11.display, &_glfw.glx.major, &_glfw.glx.minor))
333 {
334 _glfwInputError(GLFW_API_UNAVAILABLE,
335 "GLX: Failed to query GLX version");
336 return GLFW_FALSE;
337 }
338
339 if (_glfw.glx.major == 1 && _glfw.glx.minor < 3)
340 {
341 _glfwInputError(GLFW_API_UNAVAILABLE,
342 "GLX: GLX version 1.3 is required");
343 return GLFW_FALSE;
344 }
345
346 if (extensionSupportedGLX("GLX_EXT_swap_control"))
347 {
348 _glfw.glx.SwapIntervalEXT = (PFNGLXSWAPINTERVALEXTPROC)
349 getProcAddressGLX("glXSwapIntervalEXT");
350
351 if (_glfw.glx.SwapIntervalEXT)
352 _glfw.glx.EXT_swap_control = GLFW_TRUE;
353 }
354
355 if (extensionSupportedGLX("GLX_SGI_swap_control"))
356 {
357 _glfw.glx.SwapIntervalSGI = (PFNGLXSWAPINTERVALSGIPROC)
358 getProcAddressGLX("glXSwapIntervalSGI");
359
360 if (_glfw.glx.SwapIntervalSGI)
361 _glfw.glx.SGI_swap_control = GLFW_TRUE;
362 }
363
364 if (extensionSupportedGLX("GLX_MESA_swap_control"))
365 {
366 _glfw.glx.SwapIntervalMESA = (PFNGLXSWAPINTERVALMESAPROC)
367 getProcAddressGLX("glXSwapIntervalMESA");
368
369 if (_glfw.glx.SwapIntervalMESA)
370 _glfw.glx.MESA_swap_control = GLFW_TRUE;
371 }
372
373 if (extensionSupportedGLX("GLX_ARB_multisample"))
374 _glfw.glx.ARB_multisample = GLFW_TRUE;
375
376 if (extensionSupportedGLX("GLX_ARB_framebuffer_sRGB"))
377 _glfw.glx.ARB_framebuffer_sRGB = GLFW_TRUE;
378
379 if (extensionSupportedGLX("GLX_EXT_framebuffer_sRGB"))
380 _glfw.glx.EXT_framebuffer_sRGB = GLFW_TRUE;
381
382 if (extensionSupportedGLX("GLX_ARB_create_context"))
383 {
384 _glfw.glx.CreateContextAttribsARB = (PFNGLXCREATECONTEXTATTRIBSARBPROC)
385 getProcAddressGLX("glXCreateContextAttribsARB");
386
387 if (_glfw.glx.CreateContextAttribsARB)
388 _glfw.glx.ARB_create_context = GLFW_TRUE;
389 }
390
391 if (extensionSupportedGLX("GLX_ARB_create_context_robustness"))
392 _glfw.glx.ARB_create_context_robustness = GLFW_TRUE;
393
394 if (extensionSupportedGLX("GLX_ARB_create_context_profile"))
395 _glfw.glx.ARB_create_context_profile = GLFW_TRUE;
396
397 if (extensionSupportedGLX("GLX_EXT_create_context_es2_profile"))
398 _glfw.glx.EXT_create_context_es2_profile = GLFW_TRUE;
399
400 if (extensionSupportedGLX("GLX_ARB_context_flush_control"))
401 _glfw.glx.ARB_context_flush_control = GLFW_TRUE;
402
403 return GLFW_TRUE;
404 }
405
406 // Terminate GLX
407 //
_glfwTerminateGLX(void)408 void _glfwTerminateGLX(void)
409 {
410 // NOTE: This function must not call any X11 functions, as it is called
411 // after XCloseDisplay (see _glfwPlatformTerminate for details)
412
413 if (_glfw.glx.handle)
414 {
415 dlclose(_glfw.glx.handle);
416 _glfw.glx.handle = NULL;
417 }
418 }
419
420 #define setGLXattrib(attribName, attribValue) \
421 { \
422 attribs[index++] = attribName; \
423 attribs[index++] = attribValue; \
424 assert((size_t) index < sizeof(attribs) / sizeof(attribs[0])); \
425 }
426
427 // Create the OpenGL or OpenGL ES context
428 //
_glfwCreateContextGLX(_GLFWwindow * window,const _GLFWctxconfig * ctxconfig,const _GLFWfbconfig * fbconfig)429 GLFWbool _glfwCreateContextGLX(_GLFWwindow* window,
430 const _GLFWctxconfig* ctxconfig,
431 const _GLFWfbconfig* fbconfig)
432 {
433 int attribs[40];
434 GLXFBConfig native = NULL;
435 GLXContext share = NULL;
436
437 if (ctxconfig->share)
438 share = ctxconfig->share->context.glx.handle;
439
440 if (!chooseGLXFBConfig(fbconfig, &native))
441 {
442 _glfwInputError(GLFW_FORMAT_UNAVAILABLE,
443 "GLX: Failed to find a suitable GLXFBConfig");
444 return GLFW_FALSE;
445 }
446
447 if (ctxconfig->client == GLFW_OPENGL_ES_API)
448 {
449 if (!_glfw.glx.ARB_create_context ||
450 !_glfw.glx.ARB_create_context_profile ||
451 !_glfw.glx.EXT_create_context_es2_profile)
452 {
453 _glfwInputError(GLFW_API_UNAVAILABLE,
454 "GLX: OpenGL ES requested but GLX_EXT_create_context_es2_profile is unavailable");
455 return GLFW_FALSE;
456 }
457 }
458
459 if (ctxconfig->forward)
460 {
461 if (!_glfw.glx.ARB_create_context)
462 {
463 _glfwInputError(GLFW_VERSION_UNAVAILABLE,
464 "GLX: Forward compatibility requested but GLX_ARB_create_context_profile is unavailable");
465 return GLFW_FALSE;
466 }
467 }
468
469 if (ctxconfig->profile)
470 {
471 if (!_glfw.glx.ARB_create_context ||
472 !_glfw.glx.ARB_create_context_profile)
473 {
474 _glfwInputError(GLFW_VERSION_UNAVAILABLE,
475 "GLX: An OpenGL profile requested but GLX_ARB_create_context_profile is unavailable");
476 return GLFW_FALSE;
477 }
478 }
479
480 _glfwGrabErrorHandlerX11();
481
482 if (_glfw.glx.ARB_create_context)
483 {
484 int index = 0, mask = 0, flags = 0;
485
486 if (ctxconfig->client == GLFW_OPENGL_API)
487 {
488 if (ctxconfig->forward)
489 flags |= GLX_CONTEXT_FORWARD_COMPATIBLE_BIT_ARB;
490
491 if (ctxconfig->profile == GLFW_OPENGL_CORE_PROFILE)
492 mask |= GLX_CONTEXT_CORE_PROFILE_BIT_ARB;
493 else if (ctxconfig->profile == GLFW_OPENGL_COMPAT_PROFILE)
494 mask |= GLX_CONTEXT_COMPATIBILITY_PROFILE_BIT_ARB;
495 }
496 else
497 mask |= GLX_CONTEXT_ES2_PROFILE_BIT_EXT;
498
499 if (ctxconfig->debug)
500 flags |= GLX_CONTEXT_DEBUG_BIT_ARB;
501 if (ctxconfig->noerror)
502 flags |= GL_CONTEXT_FLAG_NO_ERROR_BIT_KHR;
503
504 if (ctxconfig->robustness)
505 {
506 if (_glfw.glx.ARB_create_context_robustness)
507 {
508 if (ctxconfig->robustness == GLFW_NO_RESET_NOTIFICATION)
509 {
510 setGLXattrib(GLX_CONTEXT_RESET_NOTIFICATION_STRATEGY_ARB,
511 GLX_NO_RESET_NOTIFICATION_ARB);
512 }
513 else if (ctxconfig->robustness == GLFW_LOSE_CONTEXT_ON_RESET)
514 {
515 setGLXattrib(GLX_CONTEXT_RESET_NOTIFICATION_STRATEGY_ARB,
516 GLX_LOSE_CONTEXT_ON_RESET_ARB);
517 }
518
519 flags |= GLX_CONTEXT_ROBUST_ACCESS_BIT_ARB;
520 }
521 }
522
523 if (ctxconfig->release)
524 {
525 if (_glfw.glx.ARB_context_flush_control)
526 {
527 if (ctxconfig->release == GLFW_RELEASE_BEHAVIOR_NONE)
528 {
529 setGLXattrib(GLX_CONTEXT_RELEASE_BEHAVIOR_ARB,
530 GLX_CONTEXT_RELEASE_BEHAVIOR_NONE_ARB);
531 }
532 else if (ctxconfig->release == GLFW_RELEASE_BEHAVIOR_FLUSH)
533 {
534 setGLXattrib(GLX_CONTEXT_RELEASE_BEHAVIOR_ARB,
535 GLX_CONTEXT_RELEASE_BEHAVIOR_FLUSH_ARB);
536 }
537 }
538 }
539
540 // NOTE: Only request an explicitly versioned context when necessary, as
541 // explicitly requesting version 1.0 does not always return the
542 // highest version supported by the driver
543 if (ctxconfig->major != 1 || ctxconfig->minor != 0)
544 {
545 setGLXattrib(GLX_CONTEXT_MAJOR_VERSION_ARB, ctxconfig->major);
546 setGLXattrib(GLX_CONTEXT_MINOR_VERSION_ARB, ctxconfig->minor);
547 }
548
549 if (mask)
550 setGLXattrib(GLX_CONTEXT_PROFILE_MASK_ARB, mask);
551
552 if (flags)
553 setGLXattrib(GLX_CONTEXT_FLAGS_ARB, flags);
554
555 setGLXattrib(None, None);
556
557 window->context.glx.handle =
558 _glfw.glx.CreateContextAttribsARB(_glfw.x11.display,
559 native,
560 share,
561 True,
562 attribs);
563
564 // HACK: This is a fallback for broken versions of the Mesa
565 // implementation of GLX_ARB_create_context_profile that fail
566 // default 1.0 context creation with a GLXBadProfileARB error in
567 // violation of the extension spec
568 if (!window->context.glx.handle)
569 {
570 if (_glfw.x11.errorCode == _glfw.glx.errorBase + GLXBadProfileARB &&
571 ctxconfig->client == GLFW_OPENGL_API &&
572 ctxconfig->profile == GLFW_OPENGL_ANY_PROFILE &&
573 ctxconfig->forward == GLFW_FALSE)
574 {
575 window->context.glx.handle =
576 createLegacyContextGLX(window, native, share);
577 }
578 }
579 }
580 else
581 {
582 window->context.glx.handle =
583 createLegacyContextGLX(window, native, share);
584 }
585
586 _glfwReleaseErrorHandlerX11();
587
588 if (!window->context.glx.handle)
589 {
590 _glfwInputErrorX11(GLFW_VERSION_UNAVAILABLE, "GLX: Failed to create context");
591 return GLFW_FALSE;
592 }
593
594 window->context.glx.window =
595 glXCreateWindow(_glfw.x11.display, native, window->x11.handle, NULL);
596 if (!window->context.glx.window)
597 {
598 _glfwInputError(GLFW_PLATFORM_ERROR, "GLX: Failed to create window");
599 return GLFW_FALSE;
600 }
601
602 window->context.makeCurrent = makeContextCurrentGLX;
603 window->context.swapBuffers = swapBuffersGLX;
604 window->context.swapInterval = swapIntervalGLX;
605 window->context.extensionSupported = extensionSupportedGLX;
606 window->context.getProcAddress = getProcAddressGLX;
607 window->context.destroy = destroyContextGLX;
608
609 return GLFW_TRUE;
610 }
611
612 #undef setGLXattrib
613
614 // Returns the Visual and depth of the chosen GLXFBConfig
615 //
_glfwChooseVisualGLX(const _GLFWctxconfig * ctxconfig,const _GLFWfbconfig * fbconfig,Visual ** visual,int * depth)616 GLFWbool _glfwChooseVisualGLX(const _GLFWctxconfig* ctxconfig,
617 const _GLFWfbconfig* fbconfig,
618 Visual** visual, int* depth)
619 {
620 GLXFBConfig native;
621 XVisualInfo* result;
622
623 if (!chooseGLXFBConfig(fbconfig, &native))
624 {
625 _glfwInputError(GLFW_FORMAT_UNAVAILABLE,
626 "GLX: Failed to find a suitable GLXFBConfig");
627 return GLFW_FALSE;
628 }
629
630 result = glXGetVisualFromFBConfig(_glfw.x11.display, native);
631 if (!result)
632 {
633 _glfwInputError(GLFW_PLATFORM_ERROR,
634 "GLX: Failed to retrieve Visual for GLXFBConfig");
635 return GLFW_FALSE;
636 }
637
638 *visual = result->visual;
639 *depth = result->depth;
640
641 XFree(result);
642 return GLFW_TRUE;
643 }
644
645
646 //////////////////////////////////////////////////////////////////////////
647 ////// GLFW native API //////
648 //////////////////////////////////////////////////////////////////////////
649
glfwGetGLXContext(GLFWwindow * handle)650 GLFWAPI GLXContext glfwGetGLXContext(GLFWwindow* handle)
651 {
652 _GLFWwindow* window = (_GLFWwindow*) handle;
653 _GLFW_REQUIRE_INIT_OR_RETURN(NULL);
654
655 if (window->context.client == GLFW_NO_API)
656 {
657 _glfwInputError(GLFW_NO_WINDOW_CONTEXT, NULL);
658 return NULL;
659 }
660
661 return window->context.glx.handle;
662 }
663
glfwGetGLXWindow(GLFWwindow * handle)664 GLFWAPI GLXWindow glfwGetGLXWindow(GLFWwindow* handle)
665 {
666 _GLFWwindow* window = (_GLFWwindow*) handle;
667 _GLFW_REQUIRE_INIT_OR_RETURN(None);
668
669 if (window->context.client == GLFW_NO_API)
670 {
671 _glfwInputError(GLFW_NO_WINDOW_CONTEXT, NULL);
672 return None;
673 }
674
675 return window->context.glx.window;
676 }
677
678