code: func Uniform4f(location int32, v0 float32, v1 float32, v2 float32, v3 float32) {
  	syscall.Syscall6(gpUniform4f, 5, uintptr(location), uintptr(math.Float32bits(v0)), uintptr(math.Float32bits(v1)), uintptr(math.Float32bits(v2)), uintptr(math.Float32bits(v3)), 0)
  }
docs: // Specify the value of a uniform variable for the current program object