glGetString â return a string describing the current GL connection
const GLubyte* glGetString(GLenum name);
const GLubyte* glGetStringi( | GLenum  | name, |
|  | GLuint  | index); |
name
+ Specifies a symbolic constant, one of
+ GL_VENDOR, GL_RENDERER,
+ GL_VERSION, or GL_SHADING_LANGUAGE_VERSION.
+ Additionally, glGetStringi accepts the GL_EXTENSIONS token.
+
index
+ For glGetStringi, specifies the index of the string to return.
+
+ glGetString returns a pointer to a static string
+ describing some aspect of the current GL connection.
+ name can be one of the following:
+
GL_VENDOR+
+ Returns the company responsible for this GL implementation. + This name does not change from release to release. +
GL_RENDERER+
+ 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. +
GL_VERSION+
+ Returns a version or release number. +
GL_SHADING_LANGUAGE_VERSION+
+ Returns a version or release number for the shading language. +
+ glGetStringi returns a pointer to a static string
+ indexed by index.
+ name can be one of the following:
+
GL_EXTENSIONS+
+ For glGetStringi only, returns the extension string
+ supported by the implementation at index.
+
+ Strings GL_VENDOR and GL_RENDERER together uniquely specify
+ a platform. They do not change from release to release and should be used
+ by platform-recognition algorithms.
+
+ The GL_VERSION and GL_SHADING_LANGUAGE_VERSION strings begin with a version number.
+ The version number uses one
+ of these forms:
+
+ major_number.minor_number + major_number.minor_number.release_number +
+ 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. +
+ If an error is generated, glGetString returns 0.
+
+ The client and server may support different versions.
+ glGetString always returns a compatible version number.
+ The release number always describes the server.
+
+ GL_INVALID_ENUM is generated if name is not an accepted value.
+
+ GL_INVALID_VALUE is generated by glGetStringi if
+ index is outside the valid range for indexed state name.
+
+ Copyright © 1991-2006 + Silicon Graphics, Inc. Copyright © 2010 + Khronos Group. This document is licensed under the SGI + Free Software B License. For details, see + http://oss.sgi.com/projects/FreeB/. +