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Core in version 4.6
Core since version 3.0

glGetFragDataLocation: query the bindings of color numbers to user-defined varying out variables

Function Definition

 GLint glGetFragDataLocation(GLuint program​, const char * name​);
The name of the program containing varying out variable whose binding to query
The name of the user-defined varying out variable whose binding to query


glGetFragDataLocation retrieves the assigned color number binding for the user-defined varying out variable name​ for program program​. program​ must have previously been linked. name​ must be a null-terminated string. If name​ is not the name of an active user-defined varying out fragment shader variable within program​, -1 will be returned.


GL_INVALID_OPERATION is generated if program​ is not the name of a program object.

See Also

glCreateProgram, glBindFragDataLocation


Copyright © 2010 Khronos Group. This material may be distributed subject to the terms and conditions set forth in the Open Publication License, v 1.0, 8 June 1999.