glGetFragDataIndex.3G man page

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.

See Also

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

Info

02/04/2016 [FIXME: source] [FIXME: manual]