//using UnityEngine.Rendering;

//namespace UnityEngine.PostProcessing
//{
//    public sealed class FogComponent : PostProcessingComponentCommandBuffer<FogModel>
//    {
//        static class Uniforms
//        {
//            internal static readonly int _FogColor = Shader.PropertyToID("_FogColor");
//            internal static readonly int _Density  = Shader.PropertyToID("_Density");
//            internal static readonly int _Start    = Shader.PropertyToID("_Start");
//            internal static readonly int _End      = Shader.PropertyToID("_End");
//            internal static readonly int _TempRT   = Shader.PropertyToID("_TempRT");
//        }

//        const string k_ShaderString = "Hidden/Post FX/Fog";

//        public override bool active
//        {
//            get
//            {
//                return model.enabled
//                       && context.isGBufferAvailable // In forward fog is already done at shader level
//                       && RenderSettings.fog
//                       && !context.interrupted;
//            }
//        }

//        public override string GetName()
//        {
//            return "Fog";
//        }

//        public override DepthTextureMode GetCameraFlags()
//        {
//            return DepthTextureMode.Depth;
//        }

//        public override CameraEvent GetCameraEvent()
//        {
//            return CameraEvent.AfterImageEffectsOpaque;
//        }

//        public override void PopulateCommandBuffer(CommandBuffer cb)
//        {
//            var settings = model.settings;

//            var material = context.materialFactory.Get(k_ShaderString);
//            material.shaderKeywords = null;
//            var fogColor = GraphicsUtils.isLinearColorSpace ? RenderSettings.fogColor.linear : RenderSettings.fogColor;
//            material.SetColor(Uniforms._FogColor, fogColor);
//            material.SetFloat(Uniforms._Density, RenderSettings.fogDensity);
//            material.SetFloat(Uniforms._Start, RenderSettings.fogStartDistance);
//            material.SetFloat(Uniforms._End, RenderSettings.fogEndDistance);

//            switch (RenderSettings.fogMode)
//            {
//                case FogMode.Linear:
//                    material.EnableKeyword("FOG_LINEAR");
//                    break;
//                case FogMode.Exponential:
//                    material.EnableKeyword("FOG_EXP");
//                    break;
//                case FogMode.ExponentialSquared:
//                    material.EnableKeyword("FOG_EXP2");
//                    break;
//            }

//            var fbFormat = context.isHdr
//                ? RenderTextureFormat.DefaultHDR
//                : RenderTextureFormat.Default;

//            cb.GetTemporaryRT(Uniforms._TempRT, context.width, context.height, 24, FilterMode.Bilinear, fbFormat);
//            cb.Blit(BuiltinRenderTextureType.CameraTarget, Uniforms._TempRT);
//            cb.Blit(Uniforms._TempRT, BuiltinRenderTextureType.CameraTarget, material, settings.excludeSkybox ? 1 : 0);
//            cb.ReleaseTemporaryRT(Uniforms._TempRT);
//        }
//    }
//}