Le Duc Anh
111 lines
4.1 KiB
Plaintext
111 lines
4.1 KiB
Plaintext
Shader "Hidden/Custom/BloomBlur"
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{
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Properties
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{
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_MainTex("Source", 2D) = "white" {}
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_Weights("Weights (w2,w1,w0)", Vector) = (0.2,0.4,0.8,0)
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_Direction("Direction", Vector) = (1,0,0,0)
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_Radius("Radius", Float) = 1.0
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_Threshold("Threshold", Float) = 1.0
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_Intensity("Intensity", Float) = 1.0
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}
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SubShader
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{
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Tags { "RenderType" = "Opaque" "Queue" = "Overlay" }
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Cull Off ZWrite Off ZTest Always
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Pass
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{
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Name "Extract"
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HLSLPROGRAM
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#pragma vertex VertDefault
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#pragma fragment FragExtract
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#include "Packages/com.unity.render-pipelines.universal/ShaderLibrary/Core.hlsl"
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TEXTURE2D(_MainTex); SAMPLER(sampler_MainTex);
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float4 _Weights;
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float4 _Direction;
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float _Radius;
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float _Threshold;
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float _Intensity;
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struct Attributes { float4 positionOS : POSITION; float2 uv : TEXCOORD0; };
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struct Varyings { float4 positionH : SV_POSITION; float2 uv : TEXCOORD0; };
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Varyings VertDefault(Attributes IN)
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{
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Varyings OUT;
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OUT.positionH = TransformObjectToHClip(IN.positionOS);
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OUT.uv = IN.uv;
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return OUT;
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}
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float Luminance(float3 c) { return dot(c, float3(0.2126, 0.7152, 0.0722)); }
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float4 FragExtract(Varyings IN) : SV_Target
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{
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float3 col = SAMPLE_TEXTURE2D(_MainTex, sampler_MainTex, IN.uv).rgb;
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// simple threshold: keep brightness above threshold
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float lum = dot(col, float3(0.2126, 0.7152, 0.0722));
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float keep = saturate((lum - _Threshold) / max(0.0001, (1.0 - _Threshold)));
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return float4(col * keep, 1.0);
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}
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ENDHLSL
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}
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Pass
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{
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Name "5TapBlur"
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HLSLPROGRAM
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#pragma vertex VertDefault
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#pragma fragment FragBlur
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#include "Packages/com.unity.render-pipelines.universal/ShaderLibrary/Core.hlsl"
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TEXTURE2D(_MainTex); SAMPLER(sampler_MainTex);
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float4 _Weights;
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float4 _Direction;
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float _Radius;
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float _Threshold;
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float _Intensity;
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struct Attributes { float4 positionOS : POSITION; float2 uv : TEXCOORD0; };
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struct Varyings { float4 positionH : SV_POSITION; float2 uv : TEXCOORD0; };
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Varyings VertDefault(Attributes IN)
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{
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Varyings OUT;
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OUT.positionH = TransformObjectToHClip(IN.positionOS);
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OUT.uv = IN.uv;
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return OUT;
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}
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float4 FragBlur(Varyings IN) : SV_Target
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{
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// texel size (in UV units)
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float2 texel = _ScreenParams.zw; // z = 1/width, w = 1/height
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float2 dir = _Direction.xy;
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float2 off0 = IN.uv + dir * texel * (_Radius * -2.0);
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float2 off1 = IN.uv + dir * texel * (_Radius * -1.0);
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float2 off2 = IN.uv + dir * texel * (_Radius * 0.0);
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float2 off3 = IN.uv + dir * texel * (_Radius * 1.0);
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float2 off4 = IN.uv + dir * texel * (_Radius * 2.0);
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float3 s0 = SAMPLE_TEXTURE2D(_MainTex, sampler_MainTex, off0).rgb;
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float3 s1 = SAMPLE_TEXTURE2D(_MainTex, sampler_MainTex, off1).rgb;
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float3 s2 = SAMPLE_TEXTURE2D(_MainTex, sampler_MainTex, off2).rgb;
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float3 s3 = SAMPLE_TEXTURE2D(_MainTex, sampler_MainTex, off3).rgb;
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float3 s4 = SAMPLE_TEXTURE2D(_MainTex, sampler_MainTex, off4).rgb;
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// weights: _Weights = (w2, w1, w0, 0) -> taps: w2,w1,w0,w1,w2
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float3 accum = s0 * _Weights.x + s1 * _Weights.y + s2 * _Weights.z + s3 * _Weights.y + s4 * _Weights.x;
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return float4(accum * _Intensity, 1.0);
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}
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ENDHLSL
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}
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}
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}
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