glGetFragDataIndex

glGetFragDataIndex: man3/glGetFragDataIndex.xml

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.

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

@OpenGL_Version(OGLIntroducedIn.V3P3)
@OpenGL_Extension("GL_ARB_blend_func_extended")
fn_glGetFragDataIndex glGetFragDataIndex;

See Also

glCreateProgram, glBindFragDataLocation, glBindFragDataLocationIndexed, glGetFragDataLocation

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