%mathent; ]> 2010-2014 Khronos Group glGetFragDataLocation 3G glGetFragDataLocation query the bindings of color numbers to user-defined varying out variables GLint glGetFragDataLocation GLuint program const char * name 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 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. In OpenGL ES Shading Language version 3.00, output variables must be explicitly bound to fragment colors within the shader text. This query simply returns that binding information. GL_INVALID_OPERATION is generated if program is not the name of a program object. glGetFragDataLocation glCreateProgram, 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/.