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<STRONG>NAME</STRONG>
<STRONG>glGetString</STRONG> - return a string describing the current GL
connection
<STRONG>C</STRONG> <STRONG>SPECIFICATION</STRONG>
const GLubyte * <STRONG>glGetString</STRONG>( GLenum <EM>name</EM> )
<STRONG>PARAMETERS</STRONG>
<EM>name</EM> Specifies a symbolic constant, one of <STRONG>GL_VENDOR</STRONG>,
<STRONG>GL_RENDERER</STRONG>, <STRONG>GL_VERSION</STRONG>, or <STRONG>GL_EXTENSIONS</STRONG>.
<STRONG>DESCRIPTION</STRONG>
<STRONG>glGetString</STRONG> returns a pointer to a static string describing
some aspect of the current GL connection. <EM>name</EM> can be one
of the following:
<STRONG>GL_VENDOR</STRONG> Returns the company responsible for this
GL implementation. This name does not
change from release to release.
<STRONG>GL_RENDERER</STRONG> Returns the name of the renderer. This
name is typically specific to a
particular configuration of a hardware
platform. It does not change from
release to release.
<STRONG>GL_VERSION</STRONG> Returns a version or release number.
<STRONG>GL_EXTENSIONS</STRONG> Returns a space-separated list of
supported extensions to GL.
Because the GL does not include queries for the performance
characteristics of an implementation, some applications are
written to recognize known platforms and modify their GL
usage based on known performance characteristics of these
platforms. Strings <STRONG>GL_VENDOR</STRONG> and <STRONG>GL_RENDERER</STRONG> together
uniquely specify a platform. They do not change from release
to release and should be used by platform-recognition
algorithms.
Some applications want to make use of features that are not
part of the standard GL. These features may be implemented
as extensions to the standard GL. The <STRONG>GL_EXTENSIONS</STRONG> string
is a space-separated list of supported GL extensions.
(Extension names never contain a space character.)
The <STRONG>GL_VERSION</STRONG> string begins with a version number. The
version number uses one of these forms:
<EM>major</EM>_<EM>number</EM>.<EM>minor</EM>_<EM>number</EM>
<EM>major</EM>_<EM>number</EM>.<EM>minor</EM>_<EM>number</EM>.<EM>release</EM>_<EM>number</EM>
Vendor-specific information may follow the version number.
Its format depends on the implementation, but a space always
separates the version number and the vendor-specific
information.
All strings are null-terminated.
<STRONG>NOTES</STRONG>
If an error is generated, <STRONG>glGetString</STRONG> returns 0.
The client and server may support different versions or
extensions. <STRONG>glGetString</STRONG> always returns a compatible version
number or list of extensions. The release number always
describes the server.
<STRONG>ERRORS</STRONG>
<STRONG>GL_INVALID_ENUM</STRONG> is generated if <EM>name</EM> is not an accepted
value.
<STRONG>GL_INVALID_OPERATION</STRONG> is generated if <STRONG>glGetString</STRONG> is executed
between the execution of <STRONG>glBegin</STRONG> and the corresponding
execution of <STRONG>glEnd</STRONG>.
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