NAME

       glGetFragDataIndex - query the bindings of color indices to user-defined varying out
       variables

C SPECIFICATION

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

PARAMETERS

       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

       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

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

ERRORS

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

VERSION SUPPORT

       ┌───────────────────┬───────────────────────────────────────────────────────────────────────┐
       │                   │                OpenGL Version                                         │
       ├───────────────────┼─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┤
       │Function           │ 2.0 │ 2.1 │ 3.0 │ 3.1 │ 3.2 │ 3.3 │ 4.0 │ 4.1 │ 4.2 │ 4.3 │ 4.4 │ 4.5 │
       │/                  │     │     │     │     │     │     │     │     │     │     │     │     │
       │Feature            │     │     │     │     │     │     │     │     │     │     │     │     │
       │Name               │     │     │     │     │     │     │     │     │     │     │     │     │
       ├───────────────────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┤
       │glGetFragDataIndex │  -  │  -  │  -  │  -  │  ✔  │  ✔  │  ✔  │  ✔  │  ✔  │  ✔  │  ✔  │  ✔  │
       └───────────────────┴─────┴─────┴─────┴─────┴─────┴─────┴─────┴─────┴─────┴─────┴─────┴─────┘

SEE ALSO

       glCreateProgram(), glBindFragDataLocation(), glBindFragDataLocationIndexed(),
       glGetFragDataLocation()

COPYRIGHT

       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/.

COPYRIGHT

       Copyright © 2010-2014 Khronos Group

[FIXME: source]                             01/03/2018                     GLGETFRAGDATAINDEX(3G)