Library/PackageCache/com.unity.postprocessing@2.1.6/PostProcessing/Runtime/Effects/Dithering.cs

   1 using System;
   2 using UnityEngine.Assertions;
   3
   4 namespace UnityEngine.Rendering.PostProcessing
   5 {
   6 #if UNITY_2017_1_OR_NEWER
   7     [UnityEngine.Scripting.Preserve]
   8 #endif
   9     [Serializable]
  10     internal sealed class Dithering
  11     {
  12         int m_NoiseTextureIndex = 0;
  13
  14         internal void Render(PostProcessRenderContext context)
  15         {
  16             var blueNoise = context.resources.blueNoise64;
  17             Assert.IsTrue(blueNoise != null && blueNoise.Length > 0);
  18
  19         #if POSTFX_DEBUG_STATIC_DITHERING // Used by QA for automated testing
  20             m_NoiseTextureIndex = 0;
  21             float rndOffsetX = 0f;
  22             float rndOffsetY = 0f;
  23         #else
  24             if (++m_NoiseTextureIndex >= blueNoise.Length)
  25                 m_NoiseTextureIndex = 0;
  26
  27             float rndOffsetX = Random.value;
  28             float rndOffsetY = Random.value;
  29         #endif
  30
  31             var noiseTex = blueNoise[m_NoiseTextureIndex];
  32             var uberSheet = context.uberSheet;
  33
  34             uberSheet.properties.SetTexture(ShaderIDs.DitheringTex, noiseTex);
  35             uberSheet.properties.SetVector(ShaderIDs.Dithering_Coords, new Vector4(
  36                 (float)context.screenWidth / (float)noiseTex.width,
  37                 (float)context.screenHeight / (float)noiseTex.height,
  38                 rndOffsetX,
  39                 rndOffsetY
  40             ));
  41         }
  42     }
  43 }