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Assets/Scripts/Common/Blur/UIBlur.cs

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+using FairyGUI;
+using NBF;
+using UnityEngine;
+using UnityEngine.UI;
+
+public class UIBlur : MonoBehaviour
+{
+    [Header("Quality")] public RenderTexture blurRT;
+    [Range(1, 6)] public int iterations = 2; // 模糊迭代次数
+    [Range(0.5f, 4f)] public float blurSize = 1.2f;
+
+    [Header("Shader")] public Shader blurShader;
+
+    Material _mat;
+
+    RenderTexture _capturedRT;
+    public static UIBlur Instance { get; private set; }
+
+    void Awake()
+    {
+        blurRT = new RenderTexture((int)(Screen.width * 0.5f), (int)(Screen.height * 0.5f), 0,
+            RenderTextureFormat.ARGB32);
+        _mat = new Material(blurShader);
+        DontDestroyOnLoad(gameObject);
+        Instance = this;
+    }
+
+    public void CaptureAndBlurOnce()
+    {
+        if (blurRT == null) return;
+        var captureCamera = Camera.main;
+        if (captureCamera == null) return;
+
+
+        int w = blurRT.width;
+        int h = blurRT.width;
+
+        ReleaseRTs();
+
+        var oldEnabled = StageCamera.main.enabled;
+        
+        StageCamera.main.enabled = false;
+
+        _capturedRT = new RenderTexture(w, h, 0, RenderTextureFormat.ARGB32);
+        _capturedRT.Create();
+
+        // 1) 抓摄像机画面到RT（不做ReadPixels）
+        var prevTarget = captureCamera.targetTexture;
+        captureCamera.targetTexture = _capturedRT;
+        captureCamera.Render();
+        captureCamera.targetTexture = prevTarget;
+        StageCamera.main.enabled = oldEnabled;
+        // 2) 模糊：ping-pong
+        var rt1 = RenderTexture.GetTemporary(w, h, 0, RenderTextureFormat.ARGB32);
+        var rt2 = RenderTexture.GetTemporary(w, h, 0, RenderTextureFormat.ARGB32);
+
+        Graphics.Blit(_capturedRT, rt1);
+
+        _mat.SetFloat("_BlurSize", blurSize);
+
+        for (int i = 0; i < iterations; i++)
+        {
+            // 横向
+            _mat.SetVector("_Direction", new Vector2(1, 0));
+            Graphics.Blit(rt1, rt2, _mat);
+
+            // 纵向
+            _mat.SetVector("_Direction", new Vector2(0, 1));
+            Graphics.Blit(rt2, rt1, _mat);
+        }
+
+        Graphics.Blit(rt1, blurRT);
+
+        RenderTexture.ReleaseTemporary(rt1);
+        RenderTexture.ReleaseTemporary(rt2);
+    }
+
+    void ReleaseRTs()
+    {
+        if (_capturedRT != null)
+        {
+            _capturedRT.Release();
+            Destroy(_capturedRT);
+            _capturedRT = null;
+        }
+    }
+
+    void OnDestroy()
+    {
+        ReleaseRTs();
+        if (_mat) Destroy(_mat);
+    }
+}

Assets/Scripts/Common/Blur/UIBlur.cs.meta

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+fileFormatVersion: 2
+guid: 9a0a734b63534f5e8f244a76a4a8f48d
+timeCreated: 1770122480