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119 lines
2.6 KiB
119 lines
2.6 KiB
using System.Collections;
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using System.Collections.Generic;
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using UnityEngine;
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[RequireComponent(typeof(Camera))]
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[ImageEffectAllowedInSceneView]
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[ExecuteInEditMode]
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public class Pixelize : MonoBehaviour
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{
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#region Private Members
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private Shader _screenAndMaskShader;
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private Material _screenAndMaskMaterial;
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private RenderTexture _temporaryRenderTexture;
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private Shader _combineLayersShader;
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private Material _combineLayersMaterial;
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#endregion
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#region Properties
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private Shader ScreenAndMaskShader
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{
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get
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{
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if(_screenAndMaskShader == null)
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{
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_screenAndMaskShader = Shader.Find("Hidden/PostProcess/Pixelize/ScreenAndMask");
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}
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return _screenAndMaskShader;
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}
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}
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private Material ScreenAndMaskMaterial
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{
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get
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{
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if(_screenAndMaskMaterial == null)
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{
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_screenAndMaskMaterial = new Material(ScreenAndMaskShader);
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}
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return _screenAndMaskMaterial;
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}
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}
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private RenderTexture TemporaryRenderTarget
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{
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get
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{
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if(_temporaryRenderTexture == null)
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{
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CreateTemporaryRenderTarget();
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}
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return _temporaryRenderTexture;
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}
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}
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private Shader CombineLayersShader
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{
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get
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{
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if(_combineLayersShader == null)
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{
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_combineLayersShader = Shader.Find("Hidden/PostProcess/Pixelize/CombineLayers");
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}
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return _combineLayersShader;
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}
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}
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private Material CombineLayersMaterial
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{
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get
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{
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if(_combineLayersMaterial == null)
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{
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_combineLayersMaterial = new Material(CombineLayersShader);
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}
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return _combineLayersMaterial;
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}
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}
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#endregion
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#region Functions
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void OnRenderImage(RenderTexture src, RenderTexture dest)
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{
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CheckTemporaryRenderTarget();
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Graphics.Blit(src, TemporaryRenderTarget, ScreenAndMaskMaterial);
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Graphics.Blit(TemporaryRenderTarget, dest, CombineLayersMaterial);
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}
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private void CreateTemporaryRenderTarget()
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{
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_temporaryRenderTexture = new RenderTexture(Screen.width, Screen.height, 0, RenderTextureFormat.Default, RenderTextureReadWrite.Linear); // better bit precision on Alpha would be preferable but 8 is enough for the current pixelization effect which is already banded
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_temporaryRenderTexture.useMipMap = true;
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_temporaryRenderTexture.autoGenerateMips = true;
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_temporaryRenderTexture.wrapMode = TextureWrapMode.Clamp;
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_temporaryRenderTexture.filterMode = FilterMode.Point;
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_temporaryRenderTexture.Create();
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}
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private void CheckTemporaryRenderTarget()
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{
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if(TemporaryRenderTarget.width != Screen.width || TemporaryRenderTarget.width != Screen.height)
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{
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ReleaseTemporaryRenderTarget();
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}
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}
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private void ReleaseTemporaryRenderTarget()
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{
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_temporaryRenderTexture.Release();
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_temporaryRenderTexture = null;
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}
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#endregion
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}
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