glXGetProcAddress man page on SunOS

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GLXGETPROCADDRESS(3gl)					GLXGETPROCADDRESS(3gl)

NAME
       glXGetProcAddress  - return the address of a specified GLX or GL exten‐
       sion function

C SPECIFICATION
       void glXGetProcAddress(const ubyte *procName)()

PARAMETERS
       procName	 Specifies the OpenGL extension function name.

DESCRIPTION
       The GL and GLX extensions which are available to a  client  application
       may  vary at runtime. Therefore, the address of extension functions may
       be queried at  runtime.	The  function  glXGetProcAddress  returns  the
       address	of  the	 extension  function  named  by	 procName. The pointer
       returned should be cast to a function pointer type matching the	exten‐
       sion  function's	 definition in that extension specification.  A return
       value of NULL indicates that the specified function does not exist  for
       the implementation.

       A  non-NULL  return value for glXGetProcAddress does not guarantee that
       an extension function is actually supported at runtime. The client must
       also  query  glGetString(GL_EXTENSIONS)	or glXQueryExtensionsString to
       determine if an extension is supported by a particular context.

       GL function pointers returned by glXGetProcAddress are  independent  of
       the  currently  bound context and may be used by any context which sup‐
       ports the extension.

       glXGetProcAddress may be queried for all GL and GLX extension functions
       supported by the implementation (whether those extensions are supported
       by the current context or not), and for all core (non-extension)	 func‐
       tions  in  GL and GLX from version 1.0 up to and including the versions
       of those specifications supported by the implementation, as  determined
       by glGetString(GL_VERSION) and glXQueryVersion queries.

				   25 Sep 02		GLXGETPROCADDRESS(3gl)
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