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Shader "CookbookShaders/Ch08/GrayscaleImageEffect.shader" | |
{ | |
Properties | |
{ | |
_MainTex ("Base (RGB)", 2D) = "white" {} | |
_LuminosityAmount ("GrayScale Amount", Range(0.0, 1.0)) = 1.0 | |
} | |
SubShader | |
{ | |
Pass | |
{ | |
CGPROGRAM | |
#pragma vertex vert_img | |
#pragma fragment frag | |
#pragma fragmentoption ARB_precision_hint_fastest | |
#include "UnityCG.cginc" | |
// declare corresponding CGPROGRAM variables | |
uniform sampler2D _MainTex; | |
fixed _LuminosityAmount; | |
fixed4 frag(v2f_img i) : COLOR | |
{ | |
// Get the colors from the RenderTexture and the UVs from the v2f_img struct | |
fixed4 renderTex = tex2D(_MainTex, i.uv); | |
// Apply the luminosity values to our render texture | |
float luminosity = 0.299 * renderTex.r + 0.587 * renderTex.g + 0.114 * renderTex.b; | |
fixed4 finalColor = lerp(renderTex, luminosity, _LuminosityAmount); | |
return finalColor; | |
} | |
ENDCG | |
} | |
} | |
} |
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