106 lines
2.3 KiB
Plaintext
106 lines
2.3 KiB
Plaintext
Shader "Hidden/AVProMovieCapture/SideBySideAlpha"
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{
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Properties
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{
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_MainTex ("Texture", 2D) = "white" {}
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}
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SubShader
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{
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Tags { "RenderType"="Opaque" }
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Lighting Off
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LOD 100
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Pass
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{
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CGPROGRAM
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#pragma vertex vert
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#pragma fragment frag
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#pragma multi_compile ALPHA_TOP_BOTTOM ALPHA_LEFT_RIGHT
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#pragma multi_compile __ FLIPPED SCREEN_FLIPPED
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#include "UnityCG.cginc"
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struct appdata
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{
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float4 vertex : POSITION;
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float2 uv : TEXCOORD0;
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};
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struct v2f
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{
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float2 uv : TEXCOORD0;
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float4 vertex : SV_POSITION;
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};
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sampler2D _MainTex;
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float4 _MainTex_ST;
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v2f vert (appdata v)
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{
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v2f o;
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o.vertex = UnityObjectToClipPos(v.vertex);
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o.uv = TRANSFORM_TEX(v.uv, _MainTex);
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#if ALPHA_TOP_BOTTOM
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#if FLIPPED || (SCREEN_FLIPPED && !(SHADER_API_MOBILE && SHADER_API_VULKAN))
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o.uv.y = 1.0 - ((o.vertex.y + 1.0) / 2.0);
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#else
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o.uv.y = (o.vertex.y + 1.0) / 2.0;
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#endif
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#else
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o.uv.x = (o.vertex.x + 1.0) / 2.0;
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#if FLIPPED || (SCREEN_FLIPPED && !(SHADER_API_MOBILE && SHADER_API_VULKAN))
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// Intentionally blank
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#else
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o.uv.y = (o.vertex.y + 1.0) / 2.0;
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#endif
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#endif
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return o;
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}
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fixed4 frag (v2f i) : SV_Target
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{
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float4 col;
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#if ALPHA_TOP_BOTTOM
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#if SCREEN_FLIPPED
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if( i.uv.y > 0.5 )
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{
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float texAlpha = tex2D(_MainTex, float2(i.uv.x, (i.uv.y * 2.0) - 1.0)).a;
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col = float4(texAlpha, texAlpha, texAlpha, 1.0);
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}
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else
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{
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col = tex2D(_MainTex, float2(i.uv.x, (i.uv.y * 2.0)));
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}
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#else
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if( i.uv.y < 0.5 )
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{
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float texAlpha = tex2D(_MainTex, float2(i.uv.x, (i.uv.y * 2.0))).a;
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col = float4(texAlpha, texAlpha, texAlpha, 1.0);
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}
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else
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{
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col = tex2D(_MainTex, float2(i.uv.x, ((i.uv.y * 2.0) - 1.0)));
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}
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#endif
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#else
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if( i.uv.x > 0.5 )
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{
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float texAlpha = tex2D(_MainTex, float2( ((i.uv.x * 2.0) - 1.0), i.uv.y)).a;
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col = float4(texAlpha, texAlpha, texAlpha, 1.0);
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}
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else
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{
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col = tex2D(_MainTex, float2((i.uv.x * 2.0), i.uv.y));
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}
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#endif
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return col;
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}
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ENDCG
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}
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}
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}
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