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_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/.