mirror of
https://github.com/Alex-Rachel/TEngine.git
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[+] UIGaussianBlurLayer
[+] UIGaussianBlurLayer
This commit is contained in:
ALEXTANG
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@@ -0,0 +1,146 @@
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using UnityEngine;
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namespace TEngine
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{
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public class UIGaussianBlurLayer : MonoBehaviour
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{
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public UnityEngine.UI.RawImage rawImage;
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public Shader shader;
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[Range(0, 6), Tooltip("[降采样次数]向下采样的次数。此值越大,则采样间隔越大,需要处理的像素点越少,运行速度越快。")]
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public int DownSampleNum = 2;
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[Range(0.0f, 20.0f), Tooltip("[模糊扩散度]进行高斯模糊时，相邻像素点的间隔。此值越大相邻像素间隔越远，图像越模糊。但过大的值会导致失真。")]
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public float BlurSpreadSize = 3.0f;
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[Range(0, 8), Tooltip("[迭代次数]此值越大,则模糊操作的迭代次数越多，模糊效果越好，但消耗越大。")]
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public int BlurIterations = 3;
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private Camera m_camera;
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private RenderTexture m_renderTexture;
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private Material m_material;
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private string m_shaderName = "UI/UIGaussianBlurLayer";
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private Color m_color;
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public float targetAlpha = 1f;
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private static readonly int DownSampleValue = Shader.PropertyToID("_DownSampleValue");
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#region MaterialGetAndSet
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Material material
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{
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get
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{
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if (m_material == null)
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{
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m_material = new Material(shader);
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m_material.hideFlags = HideFlags.HideAndDontSave;
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}
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return m_material;
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}
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}
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#endregion
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void Start()
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{
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m_camera = GetComponent<Camera>();
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if (shader == null)
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{
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shader = Shader.Find(m_shaderName);
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if (shader == null)
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{
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var dodShader = new TShader(m_shaderName);
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if (dodShader.Shader != null)
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{
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shader = dodShader.Shader;
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}
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}
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}
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m_color = rawImage.color;
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m_color.a = 1f;
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}
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private void Cleanup()
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{
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if (m_material)
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{
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Object.DestroyImmediate(m_material);
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}
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if (rawImage.texture)
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{
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RenderTexture.ReleaseTemporary(m_renderTexture);
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}
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}
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private void OnEnable()
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{
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Cleanup();
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}
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private void OnDestroy()
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{
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Cleanup();
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}
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void OnRenderImage(RenderTexture src, RenderTexture dest)
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{
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Graphics.Blit(src, dest);
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if (!gameObject.activeInHierarchy && enabled)
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{
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return;
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}
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if (!m_camera || !shader || m_renderTexture != null)
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{
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return;
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}
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float widthMod = 1.0f / (1.0f * (1 << DownSampleNum));
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material.SetFloat(DownSampleValue, BlurSpreadSize * widthMod);
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int renderWidth = src.width >> DownSampleNum;
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int renderHeight = src.height >> DownSampleNum;
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m_renderTexture = RenderTexture.GetTemporary(renderWidth, renderHeight, 0, RenderTextureFormat.RGB111110Float);
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m_renderTexture.filterMode = FilterMode.Bilinear;
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Graphics.Blit(src, m_renderTexture, material, 0);
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for (int i = 0; i < BlurIterations; i++)
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{
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//【2.1】Shader参数赋值
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//迭代偏移量参数
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float iterationOffs = (i * 1.0f);
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//Shader的降采样参数赋值
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material.SetFloat(DownSampleValue, BlurSpreadSize * widthMod + iterationOffs);
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// 【2.2】处理Shader的通道1，垂直方向模糊处理 || Pass1,for vertical blur
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// 定义一个临时渲染的缓存tempBuffer
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RenderTexture tempBuffer = RenderTexture.GetTemporary(renderWidth, renderHeight, 0, RenderTextureFormat.RGB111110Float);
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// 拷贝rawTexture中的渲染数据到tempBuffer,并仅绘制指定的pass1的纹理数据
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Graphics.Blit(m_renderTexture, tempBuffer, material, 1);
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// 清空rawTexture
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RenderTexture.ReleaseTemporary(m_renderTexture);
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// 将tempBuffer赋给rawTexture，此时rawTexture里面pass0和pass1的数据已经准备好
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m_renderTexture = tempBuffer;
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// 【2.3】处理Shader的通道2，竖直方向模糊处理 || Pass2,for horizontal blur
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// 获取临时渲染纹理
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tempBuffer = RenderTexture.GetTemporary(renderWidth, renderHeight, 0, RenderTextureFormat.RGB111110Float);
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// 拷贝rawTexture中的渲染数据到tempBuffer,并仅绘制指定的pass2的纹理数据
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Graphics.Blit(m_renderTexture, tempBuffer, m_material, 2);
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//【2.4】得到pass0、pass1和pass2的数据都已经准备好的rawTexture
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// 再次清空rawTexture
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RenderTexture.ReleaseTemporary(m_renderTexture);
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// 再次将tempBuffer赋给rawTexture，此时rawTexture里面pass0、pass1和pass2的数据都已经准备好
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m_renderTexture = tempBuffer;
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}
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rawImage.texture = m_renderTexture;
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m_color.a = targetAlpha;
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rawImage.color = m_color;
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m_camera.enabled = false;
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enabled = false;
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}
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}
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}
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// Upgrade NOTE: replaced 'mul(UNITY_MATRIX_MVP,*)' with 'UnityObjectToClipPos(*)'
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Shader "UI/UIGaussianBlurLayer"
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||||
{
|
||||
//-----------------------------------【属性 || Properties】------------------------------------------
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||||
Properties
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||||
{
|
||||
//主纹理
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||||
_MainTex("Base (RGB)", 2D) = "white" {}
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||||
}
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||||
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||||
//----------------------------------【子着色器 || SubShader】---------------------------------------
|
||||
SubShader
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||||
{
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||||
ZWrite Off
|
||||
Blend Off
|
||||
|
||||
//---------------------------------------【通道0 || Pass 0】------------------------------------
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||||
//通道0：降采样通道 ||Pass 0: Down Sample Pass
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||||
Pass
|
||||
{
|
||||
ZTest Off
|
||||
Cull Off
|
||||
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||||
CGPROGRAM
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||||
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||||
//指定此通道的顶点着色器为vert_DownSmpl
|
||||
#pragma vertex vert_DownSmpl
|
||||
//指定此通道的像素着色器为frag_DownSmpl
|
||||
#pragma fragment frag_DownSmpl
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||||
|
||||
ENDCG
|
||||
}
|
||||
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||||
//---------------------------------------【通道1 || Pass 1】------------------------------------
|
||||
//通道1：垂直方向模糊处理通道 ||Pass 1: Vertical Pass
|
||||
Pass
|
||||
{
|
||||
ZTest Always
|
||||
Cull Off
|
||||
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||||
CGPROGRAM
|
||||
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||||
//指定此通道的顶点着色器为vert_BlurVertical
|
||||
#pragma vertex vert_BlurVertical
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||||
//指定此通道的像素着色器为frag_Blur
|
||||
#pragma fragment frag_Blur
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||||
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||||
ENDCG
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||||
}
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||||
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||||
//---------------------------------------【通道2 || Pass 2】------------------------------------
|
||||
//通道2：水平方向模糊处理通道 ||Pass 2: Horizontal Pass
|
||||
Pass
|
||||
{
|
||||
ZTest Always
|
||||
Cull Off
|
||||
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||||
CGPROGRAM
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||||
|
||||
//指定此通道的顶点着色器为vert_BlurHorizontal
|
||||
#pragma vertex vert_BlurHorizontal
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||||
//指定此通道的像素着色器为frag_Blur
|
||||
#pragma fragment frag_Blur
|
||||
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||||
ENDCG
|
||||
}
|
||||
}
|
||||
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||||
//-------------------------CG着色语言声明部分 || Begin CG Include Part----------------------
|
||||
CGINCLUDE
|
||||
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||||
//【1】头文件包含 || include
|
||||
#include "UnityCG.cginc"
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||||
|
||||
//【2】变量声明 || Variable Declaration
|
||||
sampler2D _MainTex;
|
||||
//UnityCG.cginc中内置的变量，纹理中的单像素尺寸|| it is the size of a texel of the texture
|
||||
uniform half4 _MainTex_TexelSize;
|
||||
//C#脚本控制的变量 || Parameter
|
||||
uniform half _DownSampleValue;
|
||||
|
||||
//【3】顶点输入结构体 || Vertex Input Struct
|
||||
struct VertexInput
|
||||
{
|
||||
//顶点位置坐标
|
||||
float4 vertex : POSITION;
|
||||
//一级纹理坐标
|
||||
half2 texcoord : TEXCOORD0;
|
||||
};
|
||||
|
||||
//【4】降采样输出结构体 || Vertex Input Struct
|
||||
struct VertexOutput_DownSmpl
|
||||
{
|
||||
//像素位置坐标
|
||||
float4 pos : SV_POSITION;
|
||||
//一级纹理坐标（右上）
|
||||
half2 uv20 : TEXCOORD0;
|
||||
//二级纹理坐标（左下）
|
||||
half2 uv21 : TEXCOORD1;
|
||||
//三级纹理坐标（右下）
|
||||
half2 uv22 : TEXCOORD2;
|
||||
//四级纹理坐标（左上）
|
||||
half2 uv23 : TEXCOORD3;
|
||||
};
|
||||
|
||||
//【5】准备高斯模糊权重矩阵参数7x4的矩阵 || Gauss Weight
|
||||
static const half4 GaussWeight[7] =
|
||||
{
|
||||
half4(0.0205,0.0205,0.0205,0),
|
||||
half4(0.0855,0.0855,0.0855,0),
|
||||
half4(0.232,0.232,0.232,0),
|
||||
half4(0.324,0.324,0.324,1),
|
||||
half4(0.232,0.232,0.232,0),
|
||||
half4(0.0855,0.0855,0.0855,0),
|
||||
half4(0.0205,0.0205,0.0205,0)
|
||||
};
|
||||
|
||||
//【6】顶点着色函数 || Vertex Shader Function
|
||||
VertexOutput_DownSmpl vert_DownSmpl(VertexInput v)
|
||||
{
|
||||
//【6.1】实例化一个降采样输出结构
|
||||
VertexOutput_DownSmpl o;
|
||||
|
||||
//【6.2】填充输出结构
|
||||
//将三维空间中的坐标投影到二维窗口
|
||||
o.pos = UnityObjectToClipPos(v.vertex);
|
||||
//对图像的降采样：取像素上下左右周围的点，分别存于四级纹理坐标中
|
||||
o.uv20 = v.texcoord + _MainTex_TexelSize.xy* half2(0.5h, 0.5h);;
|
||||
o.uv21 = v.texcoord + _MainTex_TexelSize.xy * half2(-0.5h, -0.5h);
|
||||
o.uv22 = v.texcoord + _MainTex_TexelSize.xy * half2(0.5h, -0.5h);
|
||||
o.uv23 = v.texcoord + _MainTex_TexelSize.xy * half2(-0.5h, 0.5h);
|
||||
|
||||
//【6.3】返回最终的输出结果
|
||||
return o;
|
||||
}
|
||||
|
||||
//【7】片段着色函数 || Fragment Shader Function
|
||||
fixed4 frag_DownSmpl(VertexOutput_DownSmpl i) : SV_Target
|
||||
{
|
||||
//【7.1】定义一个临时的颜色值
|
||||
fixed4 color = (0,0,0,0);
|
||||
|
||||
//【7.2】四个相邻像素点处的纹理值相加
|
||||
color += tex2D(_MainTex, i.uv20);
|
||||
color += tex2D(_MainTex, i.uv21);
|
||||
color += tex2D(_MainTex, i.uv22);
|
||||
color += tex2D(_MainTex, i.uv23);
|
||||
|
||||
//【7.3】返回最终的平均值
|
||||
return color / 4;
|
||||
}
|
||||
|
||||
//【8】顶点输入结构体 || Vertex Input Struct
|
||||
struct VertexOutput_Blur
|
||||
{
|
||||
//像素坐标
|
||||
float4 pos : SV_POSITION;
|
||||
//一级纹理（纹理坐标）
|
||||
half4 uv : TEXCOORD0;
|
||||
//二级纹理（偏移量）
|
||||
half2 offset : TEXCOORD1;
|
||||
};
|
||||
|
||||
//【9】顶点着色函数 || Vertex Shader Function
|
||||
VertexOutput_Blur vert_BlurHorizontal(VertexInput v)
|
||||
{
|
||||
//【9.1】实例化一个输出结构
|
||||
VertexOutput_Blur o;
|
||||
|
||||
//【9.2】填充输出结构
|
||||
//将三维空间中的坐标投影到二维窗口
|
||||
o.pos = UnityObjectToClipPos(v.vertex);
|
||||
//纹理坐标
|
||||
o.uv = half4(v.texcoord.xy, 1, 1);
|
||||
//计算X方向的偏移量
|
||||
o.offset = _MainTex_TexelSize.xy * half2(1.0, 0.0) * _DownSampleValue;
|
||||
|
||||
//【9.3】返回最终的输出结果
|
||||
return o;
|
||||
}
|
||||
|
||||
//【10】顶点着色函数 || Vertex Shader Function
|
||||
VertexOutput_Blur vert_BlurVertical(VertexInput v)
|
||||
{
|
||||
//【10.1】实例化一个输出结构
|
||||
VertexOutput_Blur o;
|
||||
|
||||
//【10.2】填充输出结构
|
||||
//将三维空间中的坐标投影到二维窗口
|
||||
o.pos = UnityObjectToClipPos(v.vertex);
|
||||
//纹理坐标
|
||||
o.uv = half4(v.texcoord.xy, 1, 1);
|
||||
//计算Y方向的偏移量
|
||||
o.offset = _MainTex_TexelSize.xy * half2(0.0, 1.0) * _DownSampleValue;
|
||||
|
||||
//【10.3】返回最终的输出结果
|
||||
return o;
|
||||
}
|
||||
|
||||
//【11】片段着色函数 || Fragment Shader Function
|
||||
half4 frag_Blur(VertexOutput_Blur i) : SV_Target
|
||||
{
|
||||
//【11.1】获取原始的uv坐标
|
||||
half2 uv = i.uv.xy;
|
||||
|
||||
//【11.2】获取偏移量
|
||||
half2 OffsetWidth = i.offset;
|
||||
//从中心点偏移3个间隔，从最左或最上开始加权累加
|
||||
half2 uv_withOffset = uv - OffsetWidth * 3.0;
|
||||
|
||||
//【11.3】循环获取加权后的颜色值
|
||||
half4 color = 0;
|
||||
for (int j = 0; j< 7; j++)
|
||||
{
|
||||
//偏移后的像素纹理值
|
||||
half4 texCol = tex2D(_MainTex, uv_withOffset);
|
||||
//待输出颜色值+=偏移后的像素纹理值 x 高斯权重
|
||||
color += texCol * GaussWeight[j];
|
||||
//移到下一个像素处，准备下一次循环加权
|
||||
uv_withOffset += OffsetWidth;
|
||||
}
|
||||
|
||||
//【11.4】返回最终的颜色值
|
||||
return color;
|
||||
}
|
||||
|
||||
//-------------------结束CG着色语言声明部分 || End CG Programming Part------------------
|
||||
ENDCG
|
||||
|
||||
FallBack Off
|
||||
}
|
||||
@@ -0,0 +1,8 @@
|
||||
fileFormatVersion: 2
|
||||
guid: f0aa76bc245d2f941ba90eadd9bc02c2
|
||||
ShaderImporter:
|
||||
externalObjects: {}
|
||||
defaultTextures: []
|
||||
userData:
|
||||
assetBundleName:
|
||||
assetBundleVariant:
|
||||
Reference in New Issue
Block a user