Floating point texture to OpenGL

class DataGL(val data: Array[Float],
             val width: Int,
             val height: Int,
             val dimensions: Int,
             val texUnit: Int) extends RenderGL {

  val id = _createTexture()

  def _format() = dimensions match {
    case 1 => (GL30.GL_R32F, GL11.GL_R)
    case 2 => (GL30.GL_RG32F, GL30.GL_RG)
    case 3 => (GL30.GL_RGB32F, GL11.GL_RGB)
    case 4 => (GL30.GL_RGBA32F, GL11.GL_RGBA)
    case _ => throw new RuntimeException("Illegal texture dimension of " + dimensions)
  }

  def _createTexture() = {
    GL13.glActiveTexture(GL13.GL_TEXTURE0 + texUnit)

    val tid = GL11.glGenTextures()
    GL11.glBindTexture(GL11.GL_TEXTURE_2D, tid)

    GL11.glTexParameteri(GL11.GL_TEXTURE_2D, GL11.GL_TEXTURE_MIN_FILTER, GL11.GL_NEAREST)
    GL11.glTexParameteri(GL11.GL_TEXTURE_2D, GL11.GL_TEXTURE_MAG_FILTER, GL11.GL_NEAREST)
    GL11.glTexParameteri(GL11.GL_TEXTURE_2D, GL11.GL_TEXTURE_WRAP_S, GL13.GL_CLAMP_TO_BORDER)
    GL11.glTexParameteri(GL11.GL_TEXTURE_2D, GL11.GL_TEXTURE_WRAP_T, GL13.GL_CLAMP_TO_BORDER)

    val bdata = BufferUtils.createFloatBuffer(data.length)
    bdata.put(data)
    bdata.flip()

    val format = _format()
    val precisionFormat: Int = format._1
    val components: Int = format._2
    GL11.glTexImage2D(GL11.GL_TEXTURE_2D, 0, precisionFormat, width, height, 0, components, GL11.GL_FLOAT, bdata)

    GL11.glBindTexture(GL11.GL_TEXTURE_2D, 0)
    GL13.glActiveTexture(GL13.GL_TEXTURE0)
    assert(GL11.glGetError() == GL11.GL_NO_ERROR)

    tid
  }


  override def draw(): Unit = {
    GL13.glActiveTexture(GL13.GL_TEXTURE0 + texUnit)
    GL11.glBindTexture(GL11.GL_TEXTURE_2D, id)
    GL11.glTexParameteri(GL11.GL_TEXTURE_2D, GL11.GL_TEXTURE_MIN_FILTER, GL11.GL_NEAREST)
    GL11.glTexParameteri(GL11.GL_TEXTURE_2D, GL11.GL_TEXTURE_MAG_FILTER, GL11.GL_NEAREST)
    GL11.glTexParameteri(GL11.GL_TEXTURE_2D, GL11.GL_TEXTURE_WRAP_S, GL13.GL_CLAMP_TO_BORDER)
    GL11.glTexParameteri(GL11.GL_TEXTURE_2D, GL11.GL_TEXTURE_WRAP_T, GL13.GL_CLAMP_TO_BORDER)
  }

  override def dispose(): Unit = GL11.glDeleteTextures(id)

}