Unity去除视频黑色shader
转载// Upgrade NOTE: replaced 'mul(UNITY_MATRIX_MVP,*)' with 'UnityObjectToClipPos(*)'
Shader "ChromaKeyKit/ChromaKey/ChromaKey_Alpha_General" {
Properties{
_MainTex("MainTex", 2D) = "white" {}
_KeyColor("KeyColor", Color) = (1,1,1,1)
_DChroma("D Chroma", range(0.0, 1.0)) = 0.5
_DChromaT("D ChromaT", range(0.0, 1.0)) = 0.05
_DLuma("D Luma", range(0.0, 1.0)) = 0.5
_DLumaT("D LumaT", range(0.0, 1.0)) = 0.05
}
CGINCLUDE
#include "UnityCG.cginc"
struct VS_OUT {
float4 position:POSITION;
half2 texcoord0:TEXCOORD0;
};
sampler2D _MainTex;
half4 _MainTex_ST;
half4 _KeyColor;
half _DChroma;
half _DLuma;
half _DLumaT;
half _DChromaT;
VS_OUT vert(appdata_base input) {
VS_OUT o;
o.position = UnityObjectToClipPos(input.vertex);
o.texcoord0 = TRANSFORM_TEX(input.texcoord, _MainTex);
return o;
}
half3 RGB_To_YCbCr(half3 rgb) {
half Y = 0.299 * rgb.r + 0.587 * rgb.g + 0.114 * rgb.b;
half Cb = 0.564 * (rgb.b - Y);
half Cr = 0.713 * (rgb.r - Y);
return half3(Cb, Cr, Y);
}
half4 frag(VS_OUT input) : SV_Target {
half4 c = tex2D(_MainTex, input.texcoord0);
half3 src_YCbCr = RGB_To_YCbCr(c.rgb);
half3 key_YCbCr = RGB_To_YCbCr(_KeyColor);
half dChroma = distance(src_YCbCr.xy, key_YCbCr.xy);
half dLuma = distance(src_YCbCr.z, key_YCbCr.z);
if (dLuma < _DLuma && dChroma < _DChroma) {
half a = 0;
if (dChroma > _DChroma - _DChromaT) {
a = (dChroma -_DChroma + _DChromaT) / _DChromaT;
}
if (dLuma > _DLuma - _DLumaT) {
a = max(a, (dLuma - _DLuma + _DLumaT) / _DLumaT);
}
c.a = a;
}
return c;
}
ENDCG
SubShader {
//Cull back
Tags{ "Queue" = "Transparent" "RenderType" = "Transparent" "IgnoreProjector" = "True" }
Lighting Off
ZWrite Off
AlphaTest Off
Blend SrcAlpha OneMinusSrcAlpha
Pass {
CGPROGRAM
#pragma vertex vert
#pragma fragment frag
ENDCG
}
}
Fallback Off
} 作者：rookie2048 https://www.bilibili.com/read/cv16753601 出处：bilibili
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