Initialization
Use glXQueryExtension() and glXQueryVersion() to determine whether the GLX extension is defined for an X server and, if so, which version is present. glXQueryExtensionsString() returns extension information about the client-server connection. glXGetClientString() returns information about the client library, including extensions and version number. glXQueryServerString() returns similar information about the server.
glXChooseFBConfig() returns a pointer to an array of GLXFBConfig structures describing all GLX framebuffer configurations that meet the client’s specified attributes. You may use glXGetFBConfigAttrib() to query a framebuffer configuration about its support of a particular GLX attribute. You may also call glXGetVisualFromFBConfig() ...
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