1 files changed, 67 insertions, 0 deletions
diff --git a/UnityEngine.PostProcessing/FogComponent.cs b/UnityEngine.PostProcessing/FogComponent.cs
new file mode 100644
index 0000000..387ec64
--- /dev/null
+++ b/UnityEngine.PostProcessing/FogComponent.cs
@@ -0,0 +1,67 @@
+using UnityEngine.Rendering;
+
+namespace UnityEngine.PostProcessing;
+
+public sealed class FogComponent : PostProcessingComponentCommandBuffer<FogModel>
+{
+	private 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");
+	}
+
+	private const string k_ShaderString = "Hidden/Post FX/Fog";
+
+	public override bool active => base.model.enabled && context.isGBufferAvailable && 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)
+	{
+		FogModel.Settings settings = base.model.settings;
+		Material material = context.materialFactory.Get("Hidden/Post FX/Fog");
+		material.shaderKeywords = null;
+		Color value = ((!GraphicsUtils.isLinearColorSpace) ? RenderSettings.fogColor : RenderSettings.fogColor.linear);
+		material.SetColor(Uniforms._FogColor, value);
+		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;
+		}
+		RenderTextureFormat format = ((!context.isHdr) ? RenderTextureFormat.Default : RenderTextureFormat.DefaultHDR);
+		cb.GetTemporaryRT(Uniforms._TempRT, context.width, context.height, 24, FilterMode.Bilinear, format);
+		cb.Blit(BuiltinRenderTextureType.CameraTarget, Uniforms._TempRT);
+		cb.Blit(Uniforms._TempRT, BuiltinRenderTextureType.CameraTarget, material, settings.excludeSkybox ? 1 : 0);
+		cb.ReleaseTemporaryRT(Uniforms._TempRT);
+	}
+}