func NamedFramebufferDrawBuffer(framebuffer uint32, buf uint32) {
	syscall.Syscall(gpNamedFramebufferDrawBuffer, 2, uintptr(framebuffer), uintptr(buf), 0)
}
func NamedFramebufferDrawBuffer(framebuffer uint32, buf uint32) {
	syscall.Syscall(gpNamedFramebufferDrawBuffer, 2, uintptr(framebuffer), uintptr(buf), 0)
}
func NamedFramebufferDrawBuffer ( framebuffer uint32 , buf uint32 ) { syscall . Syscall ( gpNamedFramebufferDrawBuffer , 2 , uintptr ( framebuffer ) , uintptr ( buf ) , 0 ) }
// specify which color buffers are to be drawn into
specify which color buffers are to be drawn into