glGetFragDataIndex

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Query the bindings of color indices to user-defined varying out variables.

C Specification[edit]

GLint glGetFragDataIndex( GLuint program, const char * name );


Parameters[edit]

program - The name of the program containing varying out variable whose binding to query
name - The name of the user-defined varying out variable whose index to query


Description[edit]

 glGetFragDataIndex returns the index of the fragment color to which the variable name was bound when the program object program was last linked. If name is not a varying out variable of program , or if an error occurs, -1 will be returned.


Notes[edit]

 glGetFragDataIndex is available only if the GL version is 3.3 or greater.


Errors[edit]

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


Version Support[edit]

 glGetFragDataIndex  3.2+

See Also[edit]

 glCreateProgram , glBindFragDataLocation , glBindFragDataLocationIndexed , glGetFragDataLocation 


Copyright[edit]

Copyright© 2010-2014 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. http://opencontent.org/openpub/.