code: func Uniform3i(location int32, v0 int32, v1 int32, v2 int32) {
  	syscall.Syscall6(gpUniform3i, 4, uintptr(location), uintptr(v0), uintptr(v1), uintptr(v2), 0, 0)
  }
docs: // Specify the value of a uniform variable for the current program object