public TestSpriteClassState(TextureManager textureManager)
        {
            _textureManager     = textureManager;
            _testSprite.Texture = _textureManager.Get("face_alpha");
            _testSprite.SetHeight(256 * 0.5f);

            _testSprite2.Texture = textureManager.Get("face_alpha");
            _testSprite2.SetPosition(-256, -256);
            _testSprite2.SetColor(new Color(1, 1, 0, 1));
        }