36 lines
520 B
Plaintext
36 lines
520 B
Plaintext
// Outputs luminance (grayscale) of the input image _MainTex
|
|
|
|
Shader "Hidden/Contrast Stretch Luminance" {
|
|
|
|
Properties {
|
|
_MainTex ("Base (RGB)", 2D) = "white" {}
|
|
}
|
|
|
|
Category {
|
|
SubShader {
|
|
Pass {
|
|
ZTest Always Cull Off ZWrite Off
|
|
|
|
CGPROGRAM
|
|
#pragma vertex vert_img
|
|
#pragma fragment frag
|
|
#include "UnityCG.cginc"
|
|
|
|
uniform sampler2D _MainTex;
|
|
|
|
float4 frag (v2f_img i) : SV_Target
|
|
{
|
|
float4 col = tex2D(_MainTex, i.uv);
|
|
col.rgb = Luminance(col.rgb) * (1+col.a*2);
|
|
return col;
|
|
}
|
|
ENDCG
|
|
|
|
}
|
|
}
|
|
}
|
|
|
|
Fallback off
|
|
|
|
}
|