mirror of
https://github.com/nigels-com/glew.git
synced 2024-11-24 23:05:06 +00:00
70 lines
1.8 KiB
C
70 lines
1.8 KiB
C
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return GLEW_OK;
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}
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#else /* _UNIX */
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GLboolean glxewGetExtension (const char *name)
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{
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char *p, *end;
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int len = _glewStrLen(name);
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#if 1
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if (glXQueryExtensionsString == NULL || glXGetCurrentDisplay == NULL) return GL_FALSE;
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p = (char*)glXQueryExtensionsString(glXGetCurrentDisplay(), DefaultScreen(glXGetCurrentDisplay()));
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#else
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/* Temporary fix to avoid using glXGetCurrentDisplay,
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which crashes GLEW on some configurations. */
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{
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Display *dpy;
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if (glXQueryExtensionsString == NULL) return GL_FALSE;
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dpy = XOpenDisplay(NULL);
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if (dpy == NULL) return GL_FALSE;
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p = (char*)glXQueryExtensionsString(dpy, DefaultScreen(dpy));
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XCloseDisplay(dpy);
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}
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#endif
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if (0 == p) return GL_FALSE;
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end = p + _glewStrLen(p);
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while (p < end)
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{
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int n = _glewStrCLen(p, ' ');
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if (len == n && _glewStrSame(name, p, n)) return GL_TRUE;
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p += n+1;
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}
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return GL_FALSE;
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}
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static GLuint _glxewInit ()
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{
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int major, minor;
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/* initialize core GLX 1.2 */
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if (_glewInit_GLX_VERSION_1_2()) return GLEW_ERROR_GLX_VERSION_11_ONLY;
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/* query GLX version */
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#if 1
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glXQueryVersion(glXGetCurrentDisplay(), &major, &minor);
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#else
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/* Temporary fix to avoid using glXGetCurrentDisplay,
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which crashes GLEW on some configurations. */
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{
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Display* dpy = XOpenDisplay(NULL);
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if (dpy == NULL) return GLEW_ERROR_GLX_VERSION_11_ONLY;
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glXQueryVersion(dpy, &major, &minor);
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XCloseDisplay(dpy);
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}
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#endif
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switch (minor)
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{
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case 4:
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GLXEW_VERSION_1_4 = GL_TRUE;
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case 3:
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GLXEW_VERSION_1_3 = GL_TRUE;
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case 2:
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GLXEW_VERSION_1_2 = GL_TRUE;
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GLXEW_VERSION_1_1 = GL_TRUE;
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GLXEW_VERSION_1_0 = GL_TRUE;
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break;
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default:
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return GLEW_ERROR_GLX_VERSION_11_ONLY;
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break;
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}
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/* initialize extensions */
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