git.sesse.net Git - pistorm/blob - raylib_pi4_test/external/glfw/src/glx_context.c

   1 //========================================================================
   2 // GLFW 3.4 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 // It is fine to use C99 in this file because it will not be built with VS
  28 //========================================================================
  29
  30 #include "internal.h"
  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 //
  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 //
  52 static GLFWbool chooseGLXFBConfig(const _GLFWfbconfig* desired,
  53                                   GLXFBConfig* result)
  54 {
  55     GLXFBConfig* nativeConfigs;
  56     _GLFWfbconfig* usableConfigs;
  57     const _GLFWfbconfig* closest;
  58     int i, 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 = calloc(nativeCount, sizeof(_GLFWfbconfig));
  77     usableCount = 0;
  78
  79     for (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 (desired->transparent)
  96         {
  97             XVisualInfo* vi = glXGetVisualFromFBConfig(_glfw.x11.display, n);
  98             if (vi)
  99             {
 100                 u->transparent = _glfwIsVisualTransparentX11(vi->visual);
 101                 XFree(vi);
 102             }
 103         }
 104
 105         u->redBits = getGLXFBConfigAttrib(n, GLX_RED_SIZE);
 106         u->greenBits = getGLXFBConfigAttrib(n, GLX_GREEN_SIZE);
 107         u->blueBits = getGLXFBConfigAttrib(n, GLX_BLUE_SIZE);
 108
 109         u->alphaBits = getGLXFBConfigAttrib(n, GLX_ALPHA_SIZE);
 110         u->depthBits = getGLXFBConfigAttrib(n, GLX_DEPTH_SIZE);
 111         u->stencilBits = getGLXFBConfigAttrib(n, GLX_STENCIL_SIZE);
 112
 113         u->accumRedBits = getGLXFBConfigAttrib(n, GLX_ACCUM_RED_SIZE);
 114         u->accumGreenBits = getGLXFBConfigAttrib(n, GLX_ACCUM_GREEN_SIZE);
 115         u->accumBlueBits = getGLXFBConfigAttrib(n, GLX_ACCUM_BLUE_SIZE);
 116         u->accumAlphaBits = getGLXFBConfigAttrib(n, GLX_ACCUM_ALPHA_SIZE);
 117
 118         u->auxBuffers = getGLXFBConfigAttrib(n, GLX_AUX_BUFFERS);
 119
 120         if (getGLXFBConfigAttrib(n, GLX_STEREO))
 121             u->stereo = GLFW_TRUE;
 122         if (getGLXFBConfigAttrib(n, GLX_DOUBLEBUFFER))
 123             u->doublebuffer = GLFW_TRUE;
 124
 125         if (_glfw.glx.ARB_multisample)
 126             u->samples = getGLXFBConfigAttrib(n, GLX_SAMPLES);
 127
 128         if (_glfw.glx.ARB_framebuffer_sRGB || _glfw.glx.EXT_framebuffer_sRGB)
 129             u->sRGB = getGLXFBConfigAttrib(n, GLX_FRAMEBUFFER_SRGB_CAPABLE_ARB);
 130
 131         u->handle = (uintptr_t) n;
 132         usableCount++;
 133     }
 134
 135     closest = _glfwChooseFBConfig(desired, usableConfigs, usableCount);
 136     if (closest)
 137         *result = (GLXFBConfig) closest->handle;
 138
 139     XFree(nativeConfigs);
 140     free(usableConfigs);
 141
 142     return closest != NULL;
 143 }
 144
 145 // Create the OpenGL context using legacy API
 146 //
 147 static GLXContext createLegacyContextGLX(_GLFWwindow* window,
 148                                          GLXFBConfig fbconfig,
 149                                          GLXContext share)
 150 {
 151     return glXCreateNewContext(_glfw.x11.display,
 152                                fbconfig,
 153                                GLX_RGBA_TYPE,
 154                                share,
 155                                True);
 156 }
 157
 158 static void makeContextCurrentGLX(_GLFWwindow* window)
 159 {
 160     if (window)
 161     {
 162         if (!glXMakeCurrent(_glfw.x11.display,
 163                             window->context.glx.window,
 164                             window->context.glx.handle))
 165         {
 166             _glfwInputError(GLFW_PLATFORM_ERROR,
 167                             "GLX: Failed to make context current");
 168             return;
 169         }
 170     }
 171     else
 172     {
 173         if (!glXMakeCurrent(_glfw.x11.display, None, NULL))
 174         {
 175             _glfwInputError(GLFW_PLATFORM_ERROR,
 176                             "GLX: Failed to clear current context");
 177             return;
 178         }
 179     }
 180
 181     _glfwPlatformSetTls(&_glfw.contextSlot, window);
 182 }
 183
 184 static void swapBuffersGLX(_GLFWwindow* window)
 185 {
 186     glXSwapBuffers(_glfw.x11.display, window->context.glx.window);
 187 }
 188
 189 static void swapIntervalGLX(int interval)
 190 {
 191     _GLFWwindow* window = _glfwPlatformGetTls(&_glfw.contextSlot);
 192
 193     if (_glfw.glx.EXT_swap_control)
 194     {
 195         _glfw.glx.SwapIntervalEXT(_glfw.x11.display,
 196                                   window->context.glx.window,
 197                                   interval);
 198     }
 199     else if (_glfw.glx.MESA_swap_control)
 200         _glfw.glx.SwapIntervalMESA(interval);
 201     else if (_glfw.glx.SGI_swap_control)
 202     {
 203         if (interval > 0)
 204             _glfw.glx.SwapIntervalSGI(interval);
 205     }
 206 }
 207
 208 static int extensionSupportedGLX(const char* extension)
 209 {
 210     const char* extensions =
 211         glXQueryExtensionsString(_glfw.x11.display, _glfw.x11.screen);
 212     if (extensions)
 213     {
 214         if (_glfwStringInExtensionString(extension, extensions))
 215             return GLFW_TRUE;
 216     }
 217
 218     return GLFW_FALSE;
 219 }
 220
 221 static GLFWglproc getProcAddressGLX(const char* procname)
 222 {
 223     if (_glfw.glx.GetProcAddress)
 224         return _glfw.glx.GetProcAddress((const GLubyte*) procname);
 225     else if (_glfw.glx.GetProcAddressARB)
 226         return _glfw.glx.GetProcAddressARB((const GLubyte*) procname);
 227     else
 228         return _glfw_dlsym(_glfw.glx.handle, procname);
 229 }
 230
 231 static void destroyContextGLX(_GLFWwindow* window)
 232 {
 233     if (window->context.glx.window)
 234     {
 235         glXDestroyWindow(_glfw.x11.display, window->context.glx.window);
 236         window->context.glx.window = None;
 237     }
 238
 239     if (window->context.glx.handle)
 240     {
 241         glXDestroyContext(_glfw.x11.display, window->context.glx.handle);
 242         window->context.glx.handle = NULL;
 243     }
 244 }
 245
 246
 247 //////////////////////////////////////////////////////////////////////////
 248 //////                       GLFW internal API                      //////
 249 //////////////////////////////////////////////////////////////////////////
 250
 251 // Initialize GLX
 252 //
 253 GLFWbool _glfwInitGLX(void)
 254 {
 255     int i;
 256     const char* sonames[] =
 257     {
 258 #if defined(_GLFW_GLX_LIBRARY)
 259         _GLFW_GLX_LIBRARY,
 260 #elif defined(__CYGWIN__)
 261         "libGL-1.so",
 262 #else
 263         "libGL.so.1",
 264         "libGL.so",
 265 #endif
 266         NULL
 267     };
 268
 269     if (_glfw.glx.handle)
 270         return GLFW_TRUE;
 271
 272     for (i = 0;  sonames[i];  i++)
 273     {
 274         _glfw.glx.handle = _glfw_dlopen(sonames[i]);
 275         if (_glfw.glx.handle)
 276             break;
 277     }
 278
 279     if (!_glfw.glx.handle)
 280     {
 281         _glfwInputError(GLFW_API_UNAVAILABLE, "GLX: Failed to load GLX");
 282         return GLFW_FALSE;
 283     }
 284
 285     _glfw.glx.GetFBConfigs =
 286         _glfw_dlsym(_glfw.glx.handle, "glXGetFBConfigs");
 287     _glfw.glx.GetFBConfigAttrib =
 288         _glfw_dlsym(_glfw.glx.handle, "glXGetFBConfigAttrib");
 289     _glfw.glx.GetClientString =
 290         _glfw_dlsym(_glfw.glx.handle, "glXGetClientString");
 291     _glfw.glx.QueryExtension =
 292         _glfw_dlsym(_glfw.glx.handle, "glXQueryExtension");
 293     _glfw.glx.QueryVersion =
 294         _glfw_dlsym(_glfw.glx.handle, "glXQueryVersion");
 295     _glfw.glx.DestroyContext =
 296         _glfw_dlsym(_glfw.glx.handle, "glXDestroyContext");
 297     _glfw.glx.MakeCurrent =
 298         _glfw_dlsym(_glfw.glx.handle, "glXMakeCurrent");
 299     _glfw.glx.SwapBuffers =
 300         _glfw_dlsym(_glfw.glx.handle, "glXSwapBuffers");
 301     _glfw.glx.QueryExtensionsString =
 302         _glfw_dlsym(_glfw.glx.handle, "glXQueryExtensionsString");
 303     _glfw.glx.CreateNewContext =
 304         _glfw_dlsym(_glfw.glx.handle, "glXCreateNewContext");
 305     _glfw.glx.CreateWindow =
 306         _glfw_dlsym(_glfw.glx.handle, "glXCreateWindow");
 307     _glfw.glx.DestroyWindow =
 308         _glfw_dlsym(_glfw.glx.handle, "glXDestroyWindow");
 309     _glfw.glx.GetProcAddress =
 310         _glfw_dlsym(_glfw.glx.handle, "glXGetProcAddress");
 311     _glfw.glx.GetProcAddressARB =
 312         _glfw_dlsym(_glfw.glx.handle, "glXGetProcAddressARB");
 313     _glfw.glx.GetVisualFromFBConfig =
 314         _glfw_dlsym(_glfw.glx.handle, "glXGetVisualFromFBConfig");
 315
 316     if (!_glfw.glx.GetFBConfigs ||
 317         !_glfw.glx.GetFBConfigAttrib ||
 318         !_glfw.glx.GetClientString ||
 319         !_glfw.glx.QueryExtension ||
 320         !_glfw.glx.QueryVersion ||
 321         !_glfw.glx.DestroyContext ||
 322         !_glfw.glx.MakeCurrent ||
 323         !_glfw.glx.SwapBuffers ||
 324         !_glfw.glx.QueryExtensionsString ||
 325         !_glfw.glx.CreateNewContext ||
 326         !_glfw.glx.CreateWindow ||
 327         !_glfw.glx.DestroyWindow ||
 328         !_glfw.glx.GetProcAddress ||
 329         !_glfw.glx.GetProcAddressARB ||
 330         !_glfw.glx.GetVisualFromFBConfig)
 331     {
 332         _glfwInputError(GLFW_PLATFORM_ERROR,
 333                         "GLX: Failed to load required entry points");
 334         return GLFW_FALSE;
 335     }
 336
 337     if (!glXQueryExtension(_glfw.x11.display,
 338                            &_glfw.glx.errorBase,
 339                            &_glfw.glx.eventBase))
 340     {
 341         _glfwInputError(GLFW_API_UNAVAILABLE, "GLX: GLX extension not found");
 342         return GLFW_FALSE;
 343     }
 344
 345     if (!glXQueryVersion(_glfw.x11.display, &_glfw.glx.major, &_glfw.glx.minor))
 346     {
 347         _glfwInputError(GLFW_API_UNAVAILABLE,
 348                         "GLX: Failed to query GLX version");
 349         return GLFW_FALSE;
 350     }
 351
 352     if (_glfw.glx.major == 1 && _glfw.glx.minor < 3)
 353     {
 354         _glfwInputError(GLFW_API_UNAVAILABLE,
 355                         "GLX: GLX version 1.3 is required");
 356         return GLFW_FALSE;
 357     }
 358
 359     if (extensionSupportedGLX("GLX_EXT_swap_control"))
 360     {
 361         _glfw.glx.SwapIntervalEXT = (PFNGLXSWAPINTERVALEXTPROC)
 362             getProcAddressGLX("glXSwapIntervalEXT");
 363
 364         if (_glfw.glx.SwapIntervalEXT)
 365             _glfw.glx.EXT_swap_control = GLFW_TRUE;
 366     }
 367
 368     if (extensionSupportedGLX("GLX_SGI_swap_control"))
 369     {
 370         _glfw.glx.SwapIntervalSGI = (PFNGLXSWAPINTERVALSGIPROC)
 371             getProcAddressGLX("glXSwapIntervalSGI");
 372
 373         if (_glfw.glx.SwapIntervalSGI)
 374             _glfw.glx.SGI_swap_control = GLFW_TRUE;
 375     }
 376
 377     if (extensionSupportedGLX("GLX_MESA_swap_control"))
 378     {
 379         _glfw.glx.SwapIntervalMESA = (PFNGLXSWAPINTERVALMESAPROC)
 380             getProcAddressGLX("glXSwapIntervalMESA");
 381
 382         if (_glfw.glx.SwapIntervalMESA)
 383             _glfw.glx.MESA_swap_control = GLFW_TRUE;
 384     }
 385
 386     if (extensionSupportedGLX("GLX_ARB_multisample"))
 387         _glfw.glx.ARB_multisample = GLFW_TRUE;
 388
 389     if (extensionSupportedGLX("GLX_ARB_framebuffer_sRGB"))
 390         _glfw.glx.ARB_framebuffer_sRGB = GLFW_TRUE;
 391
 392     if (extensionSupportedGLX("GLX_EXT_framebuffer_sRGB"))
 393         _glfw.glx.EXT_framebuffer_sRGB = GLFW_TRUE;
 394
 395     if (extensionSupportedGLX("GLX_ARB_create_context"))
 396     {
 397         _glfw.glx.CreateContextAttribsARB = (PFNGLXCREATECONTEXTATTRIBSARBPROC)
 398             getProcAddressGLX("glXCreateContextAttribsARB");
 399
 400         if (_glfw.glx.CreateContextAttribsARB)
 401             _glfw.glx.ARB_create_context = GLFW_TRUE;
 402     }
 403
 404     if (extensionSupportedGLX("GLX_ARB_create_context_robustness"))
 405         _glfw.glx.ARB_create_context_robustness = GLFW_TRUE;
 406
 407     if (extensionSupportedGLX("GLX_ARB_create_context_profile"))
 408         _glfw.glx.ARB_create_context_profile = GLFW_TRUE;
 409
 410     if (extensionSupportedGLX("GLX_EXT_create_context_es2_profile"))
 411         _glfw.glx.EXT_create_context_es2_profile = GLFW_TRUE;
 412
 413     if (extensionSupportedGLX("GLX_ARB_create_context_no_error"))
 414         _glfw.glx.ARB_create_context_no_error = GLFW_TRUE;
 415
 416     if (extensionSupportedGLX("GLX_ARB_context_flush_control"))
 417         _glfw.glx.ARB_context_flush_control = GLFW_TRUE;
 418
 419     return GLFW_TRUE;
 420 }
 421
 422 // Terminate GLX
 423 //
 424 void _glfwTerminateGLX(void)
 425 {
 426     // NOTE: This function must not call any X11 functions, as it is called
 427     //       after XCloseDisplay (see _glfwPlatformTerminate for details)
 428
 429     if (_glfw.glx.handle)
 430     {
 431         _glfw_dlclose(_glfw.glx.handle);
 432         _glfw.glx.handle = NULL;
 433     }
 434 }
 435
 436 #define setAttrib(a, v) \
 437 { \
 438     assert(((size_t) index + 1) < sizeof(attribs) / sizeof(attribs[0])); \
 439     attribs[index++] = a; \
 440     attribs[index++] = v; \
 441 }
 442
 443 // Create the OpenGL or OpenGL ES context
 444 //
 445 GLFWbool _glfwCreateContextGLX(_GLFWwindow* window,
 446                                const _GLFWctxconfig* ctxconfig,
 447                                const _GLFWfbconfig* fbconfig)
 448 {
 449     int attribs[40];
 450     GLXFBConfig native = NULL;
 451     GLXContext share = NULL;
 452
 453     if (ctxconfig->share)
 454         share = ctxconfig->share->context.glx.handle;
 455
 456     if (!chooseGLXFBConfig(fbconfig, &native))
 457     {
 458         _glfwInputError(GLFW_FORMAT_UNAVAILABLE,
 459                         "GLX: Failed to find a suitable GLXFBConfig");
 460         return GLFW_FALSE;
 461     }
 462
 463     if (ctxconfig->client == GLFW_OPENGL_ES_API)
 464     {
 465         if (!_glfw.glx.ARB_create_context ||
 466             !_glfw.glx.ARB_create_context_profile ||
 467             !_glfw.glx.EXT_create_context_es2_profile)
 468         {
 469             _glfwInputError(GLFW_API_UNAVAILABLE,
 470                             "GLX: OpenGL ES requested but GLX_EXT_create_context_es2_profile is unavailable");
 471             return GLFW_FALSE;
 472         }
 473     }
 474
 475     if (ctxconfig->forward)
 476     {
 477         if (!_glfw.glx.ARB_create_context)
 478         {
 479             _glfwInputError(GLFW_VERSION_UNAVAILABLE,
 480                             "GLX: Forward compatibility requested but GLX_ARB_create_context_profile is unavailable");
 481             return GLFW_FALSE;
 482         }
 483     }
 484
 485     if (ctxconfig->profile)
 486     {
 487         if (!_glfw.glx.ARB_create_context ||
 488             !_glfw.glx.ARB_create_context_profile)
 489         {
 490             _glfwInputError(GLFW_VERSION_UNAVAILABLE,
 491                             "GLX: An OpenGL profile requested but GLX_ARB_create_context_profile is unavailable");
 492             return GLFW_FALSE;
 493         }
 494     }
 495
 496     _glfwGrabErrorHandlerX11();
 497
 498     if (_glfw.glx.ARB_create_context)
 499     {
 500         int index = 0, mask = 0, flags = 0;
 501
 502         if (ctxconfig->client == GLFW_OPENGL_API)
 503         {
 504             if (ctxconfig->forward)
 505                 flags |= GLX_CONTEXT_FORWARD_COMPATIBLE_BIT_ARB;
 506
 507             if (ctxconfig->profile == GLFW_OPENGL_CORE_PROFILE)
 508                 mask |= GLX_CONTEXT_CORE_PROFILE_BIT_ARB;
 509             else if (ctxconfig->profile == GLFW_OPENGL_COMPAT_PROFILE)
 510                 mask |= GLX_CONTEXT_COMPATIBILITY_PROFILE_BIT_ARB;
 511         }
 512         else
 513             mask |= GLX_CONTEXT_ES2_PROFILE_BIT_EXT;
 514
 515         if (ctxconfig->debug)
 516             flags |= GLX_CONTEXT_DEBUG_BIT_ARB;
 517
 518         if (ctxconfig->robustness)
 519         {
 520             if (_glfw.glx.ARB_create_context_robustness)
 521             {
 522                 if (ctxconfig->robustness == GLFW_NO_RESET_NOTIFICATION)
 523                 {
 524                     setAttrib(GLX_CONTEXT_RESET_NOTIFICATION_STRATEGY_ARB,
 525                               GLX_NO_RESET_NOTIFICATION_ARB);
 526                 }
 527                 else if (ctxconfig->robustness == GLFW_LOSE_CONTEXT_ON_RESET)
 528                 {
 529                     setAttrib(GLX_CONTEXT_RESET_NOTIFICATION_STRATEGY_ARB,
 530                               GLX_LOSE_CONTEXT_ON_RESET_ARB);
 531                 }
 532
 533                 flags |= GLX_CONTEXT_ROBUST_ACCESS_BIT_ARB;
 534             }
 535         }
 536
 537         if (ctxconfig->release)
 538         {
 539             if (_glfw.glx.ARB_context_flush_control)
 540             {
 541                 if (ctxconfig->release == GLFW_RELEASE_BEHAVIOR_NONE)
 542                 {
 543                     setAttrib(GLX_CONTEXT_RELEASE_BEHAVIOR_ARB,
 544                               GLX_CONTEXT_RELEASE_BEHAVIOR_NONE_ARB);
 545                 }
 546                 else if (ctxconfig->release == GLFW_RELEASE_BEHAVIOR_FLUSH)
 547                 {
 548                     setAttrib(GLX_CONTEXT_RELEASE_BEHAVIOR_ARB,
 549                               GLX_CONTEXT_RELEASE_BEHAVIOR_FLUSH_ARB);
 550                 }
 551             }
 552         }
 553
 554         if (ctxconfig->noerror)
 555         {
 556             if (_glfw.glx.ARB_create_context_no_error)
 557                 setAttrib(GLX_CONTEXT_OPENGL_NO_ERROR_ARB, GLFW_TRUE);
 558         }
 559
 560         // NOTE: Only request an explicitly versioned context when necessary, as
 561         //       explicitly requesting version 1.0 does not always return the
 562         //       highest version supported by the driver
 563         if (ctxconfig->major != 1 || ctxconfig->minor != 0)
 564         {
 565             setAttrib(GLX_CONTEXT_MAJOR_VERSION_ARB, ctxconfig->major);
 566             setAttrib(GLX_CONTEXT_MINOR_VERSION_ARB, ctxconfig->minor);
 567         }
 568
 569         if (mask)
 570             setAttrib(GLX_CONTEXT_PROFILE_MASK_ARB, mask);
 571
 572         if (flags)
 573             setAttrib(GLX_CONTEXT_FLAGS_ARB, flags);
 574
 575         setAttrib(None, None);
 576
 577         window->context.glx.handle =
 578             _glfw.glx.CreateContextAttribsARB(_glfw.x11.display,
 579                                               native,
 580                                               share,
 581                                               True,
 582                                               attribs);
 583
 584         // HACK: This is a fallback for broken versions of the Mesa
 585         //       implementation of GLX_ARB_create_context_profile that fail
 586         //       default 1.0 context creation with a GLXBadProfileARB error in
 587         //       violation of the extension spec
 588         if (!window->context.glx.handle)
 589         {
 590             if (_glfw.x11.errorCode == _glfw.glx.errorBase + GLXBadProfileARB &&
 591                 ctxconfig->client == GLFW_OPENGL_API &&
 592                 ctxconfig->profile == GLFW_OPENGL_ANY_PROFILE &&
 593                 ctxconfig->forward == GLFW_FALSE)
 594             {
 595                 window->context.glx.handle =
 596                     createLegacyContextGLX(window, native, share);
 597             }
 598         }
 599     }
 600     else
 601     {
 602         window->context.glx.handle =
 603             createLegacyContextGLX(window, native, share);
 604     }
 605
 606     _glfwReleaseErrorHandlerX11();
 607
 608     if (!window->context.glx.handle)
 609     {
 610         _glfwInputErrorX11(GLFW_VERSION_UNAVAILABLE, "GLX: Failed to create context");
 611         return GLFW_FALSE;
 612     }
 613
 614     window->context.glx.window =
 615         glXCreateWindow(_glfw.x11.display, native, window->x11.handle, NULL);
 616     if (!window->context.glx.window)
 617     {
 618         _glfwInputError(GLFW_PLATFORM_ERROR, "GLX: Failed to create window");
 619         return GLFW_FALSE;
 620     }
 621
 622     window->context.makeCurrent = makeContextCurrentGLX;
 623     window->context.swapBuffers = swapBuffersGLX;
 624     window->context.swapInterval = swapIntervalGLX;
 625     window->context.extensionSupported = extensionSupportedGLX;
 626     window->context.getProcAddress = getProcAddressGLX;
 627     window->context.destroy = destroyContextGLX;
 628
 629     return GLFW_TRUE;
 630 }
 631
 632 #undef setAttrib
 633
 634 // Returns the Visual and depth of the chosen GLXFBConfig
 635 //
 636 GLFWbool _glfwChooseVisualGLX(const _GLFWwndconfig* wndconfig,
 637                               const _GLFWctxconfig* ctxconfig,
 638                               const _GLFWfbconfig* fbconfig,
 639                               Visual** visual, int* depth)
 640 {
 641     GLXFBConfig native;
 642     XVisualInfo* result;
 643
 644     if (!chooseGLXFBConfig(fbconfig, &native))
 645     {
 646         _glfwInputError(GLFW_FORMAT_UNAVAILABLE,
 647                         "GLX: Failed to find a suitable GLXFBConfig");
 648         return GLFW_FALSE;
 649     }
 650
 651     result = glXGetVisualFromFBConfig(_glfw.x11.display, native);
 652     if (!result)
 653     {
 654         _glfwInputError(GLFW_PLATFORM_ERROR,
 655                         "GLX: Failed to retrieve Visual for GLXFBConfig");
 656         return GLFW_FALSE;
 657     }
 658
 659     *visual = result->visual;
 660     *depth  = result->depth;
 661
 662     XFree(result);
 663     return GLFW_TRUE;
 664 }
 665
 666
 667 //////////////////////////////////////////////////////////////////////////
 668 //////                        GLFW native API                       //////
 669 //////////////////////////////////////////////////////////////////////////
 670
 671 GLFWAPI GLXContext glfwGetGLXContext(GLFWwindow* handle)
 672 {
 673     _GLFWwindow* window = (_GLFWwindow*) handle;
 674     _GLFW_REQUIRE_INIT_OR_RETURN(NULL);
 675
 676     if (window->context.client == GLFW_NO_API)
 677     {
 678         _glfwInputError(GLFW_NO_WINDOW_CONTEXT, NULL);
 679         return NULL;
 680     }
 681
 682     return window->context.glx.handle;
 683 }
 684
 685 GLFWAPI GLXWindow glfwGetGLXWindow(GLFWwindow* handle)
 686 {
 687     _GLFWwindow* window = (_GLFWwindow*) handle;
 688     _GLFW_REQUIRE_INIT_OR_RETURN(None);
 689
 690     if (window->context.client == GLFW_NO_API)
 691     {
 692         _glfwInputError(GLFW_NO_WINDOW_CONTEXT, NULL);
 693         return None;
 694     }
 695
 696     return window->context.glx.window;
 697 }
 698