//namespace UnityEngine.PostProcessing
//{
//    public sealed class UserLutComponent : PostProcessingComponentRenderTexture<UserLutModel>
//    {
//        static class Uniforms
//        {
//            internal static readonly int _UserLut        = Shader.PropertyToID("_UserLut");
//            internal static readonly int _UserLut_Params = Shader.PropertyToID("_UserLut_Params");
//        }

//        public override bool active
//        {
//            get
//            {
//                var settings = model.settings;
//                return model.enabled
//                       && settings.lut != null
//                       && settings.contribution > 0f
//                       && settings.lut.height == (int)Mathf.Sqrt(settings.lut.width)
//                       && !context.interrupted;
//            }
//        }

//        public override void Prepare(Material uberMaterial)
//        {
//            var settings = model.settings;
//            uberMaterial.EnableKeyword("USER_LUT");
//            uberMaterial.SetTexture(Uniforms._UserLut, settings.lut);
//            uberMaterial.SetVector(Uniforms._UserLut_Params, new Vector4(1f / settings.lut.width, 1f / settings.lut.height, settings.lut.height - 1f, settings.contribution));
//        }

//        public void OnGUI()
//        {
//            var settings = model.settings;
//            var rect = new Rect(context.viewport.x * Screen.width + 8f, 8f, settings.lut.width, settings.lut.height);
//            GUI.DrawTexture(rect, settings.lut);
//        }
//    }
//}