Library/PackageCache/com.unity.postprocessing@2.1.2/PostProcessing/Runtime/Utils/TargetPool.cs

   1 using System.Collections.Generic;
   2
   3 namespace UnityEngine.Rendering.PostProcessing
   4 {
   5     class TargetPool
   6     {
   7         readonly List<int> m_Pool;
   8         int m_Current;
   9
  10         internal TargetPool()
  11         {
  12             m_Pool = new List<int>();
  13             Get(); // Pre-warm with a default target to avoid black frame on first frame
  14         }
  15
  16         internal int Get()
  17         {
  18             int ret = Get(m_Current);
  19             m_Current++;
  20             return ret;
  21         }
  22
  23         int Get(int i)
  24         {
  25             int ret;
  26
  27             if (m_Pool.Count > i)
  28             {
  29                 ret = m_Pool[i];
  30             }
  31             else
  32             {
  33                 // Avoid discontinuities
  34                 while (m_Pool.Count <= i)
  35                     m_Pool.Add(Shader.PropertyToID("_TargetPool" + i));
  36
  37                 ret = m_Pool[i];
  38             }
  39
  40             return ret;
  41         }
  42
  43         internal void Reset()
  44         {
  45             m_Current = 0;
  46         }
  47     }
  48 }