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CentOS 7.0 - man page for glgetstring (centos section 3g)

GLGETSTRING(3G) 				    OpenGL Manual				      GLGETSTRING(3G)

glGetString - 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_numbermajor_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 (C) 1991-2006 Silicon Graphics, Inc. Copyright (C) 2010 Khronos Group. This document is licensed under the SGI Free Software B License. For details, see http://oss.sgi.com/projects/FreeB/.
opengl.org opengl.org 06/10/2014 GLGETSTRING(3G)

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