Get the currently used transformFeedbackBufferMode

The name, datatype and size of the transform feedback varyings.

Set all the transform feedbacks varyings for this program it overwrites any previous call to this function

Max number of seprate atributes or varyings than can be captured in transformfeedback, initial value 4

Max number of components to write to a single buffer in interleaved mod, initial value 64

Max number of components per attribute or varying in seperate mode initial value 4