+init

1 files changed, 52 insertions, 0 deletions

diff --git a/UnityEngine.PostProcessing/GrainComponent.cs b/UnityEngine.PostProcessing/GrainComponent.cs
new file mode 100644
index 0000000..c01dcda
--- /dev/null
+++ b/UnityEngine.PostProcessing/GrainComponent.cs
@@ -0,0 +1,52 @@
+namespace UnityEngine.PostProcessing;
+
+public sealed class GrainComponent : PostProcessingComponentRenderTexture<GrainModel>
+{
+	private static class Uniforms
+	{
+		internal static readonly int _Grain_Params1 = Shader.PropertyToID("_Grain_Params1");
+
+		internal static readonly int _Grain_Params2 = Shader.PropertyToID("_Grain_Params2");
+
+		internal static readonly int _GrainTex = Shader.PropertyToID("_GrainTex");
+
+		internal static readonly int _Phase = Shader.PropertyToID("_Phase");
+	}
+
+	private RenderTexture m_GrainLookupRT;
+
+	public override bool active => base.model.enabled && base.model.settings.intensity > 0f && SystemInfo.SupportsRenderTextureFormat(RenderTextureFormat.ARGBHalf) && !context.interrupted;
+
+	public override void OnDisable()
+	{
+		GraphicsUtils.Destroy(m_GrainLookupRT);
+		m_GrainLookupRT = null;
+	}
+
+	public override void Prepare(Material uberMaterial)
+	{
+		GrainModel.Settings settings = base.model.settings;
+		uberMaterial.EnableKeyword("GRAIN");
+		float realtimeSinceStartup = Time.realtimeSinceStartup;
+		float value = Random.value;
+		float value2 = Random.value;
+		if (m_GrainLookupRT == null || !m_GrainLookupRT.IsCreated())
+		{
+			GraphicsUtils.Destroy(m_GrainLookupRT);
+			m_GrainLookupRT = new RenderTexture(192, 192, 0, RenderTextureFormat.ARGBHalf)
+			{
+				filterMode = FilterMode.Bilinear,
+				wrapMode = TextureWrapMode.Repeat,
+				anisoLevel = 0,
+				name = "Grain Lookup Texture"
+			};
+			m_GrainLookupRT.Create();
+		}
+		Material material = context.materialFactory.Get("Hidden/Post FX/Grain Generator");
+		material.SetFloat(Uniforms._Phase, realtimeSinceStartup / 20f);
+		Graphics.Blit(null, m_GrainLookupRT, material, settings.colored ? 1 : 0);
+		uberMaterial.SetTexture(Uniforms._GrainTex, m_GrainLookupRT);
+		uberMaterial.SetVector(Uniforms._Grain_Params1, new Vector2(settings.luminanceContribution, settings.intensity * 20f));
+		uberMaterial.SetVector(Uniforms._Grain_Params2, new Vector4((float)context.width / (float)m_GrainLookupRT.width / settings.size, (float)context.height / (float)m_GrainLookupRT.height / settings.size, value, value2));
+	}
+}