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Assets/ThirdParty/PostProcessing/Runtime/Components/DitheringComponent.cs

@@ -0,0 +1,71 @@
+namespace UnityEngine.PostProcessing
+{
+    public sealed class DitheringComponent : PostProcessingComponentRenderTexture<DitheringModel>
+    {
+        static class Uniforms
+        {
+            internal static readonly int _DitheringTex = Shader.PropertyToID("_DitheringTex");
+            internal static readonly int _DitheringCoords = Shader.PropertyToID("_DitheringCoords");
+        }
+
+        public override bool active
+        {
+            get
+            {
+                return model.enabled
+                       && !context.interrupted;
+            }
+        }
+
+        // Holds 64 64x64 Alpha8 textures (256kb total)
+        Texture2D[] noiseTextures;
+        int textureIndex = 0;
+
+        const int k_TextureCount = 64;
+
+        public override void OnDisable()
+        {
+            noiseTextures = null;
+        }
+
+        void LoadNoiseTextures()
+        {
+            noiseTextures = new Texture2D[k_TextureCount];
+
+            for (int i = 0; i < k_TextureCount; i++)
+                noiseTextures[i] = Resources.Load<Texture2D>("Bluenoise64/LDR_LLL1_" + i);
+        }
+
+        public override void Prepare(Material uberMaterial)
+        {
+            float rndOffsetX;
+            float rndOffsetY;
+
+#if POSTFX_DEBUG_STATIC_DITHERING
+            textureIndex = 0;
+            rndOffsetX = 0f;
+            rndOffsetY = 0f;
+#else
+            if (++textureIndex >= k_TextureCount)
+                textureIndex = 0;
+
+            rndOffsetX = Random.value;
+            rndOffsetY = Random.value;
+#endif
+
+            if (noiseTextures == null)
+                LoadNoiseTextures();
+
+            var noiseTex = noiseTextures[textureIndex];
+
+            uberMaterial.EnableKeyword("DITHERING");
+            uberMaterial.SetTexture(Uniforms._DitheringTex, noiseTex);
+            uberMaterial.SetVector(Uniforms._DitheringCoords, new Vector4(
+                (float)context.width / (float)noiseTex.width,
+                (float)context.height / (float)noiseTex.height,
+                rndOffsetX,
+                rndOffsetY
+            ));
+        }
+    }
+}