237 lines
10 KiB
GLSL
237 lines
10 KiB
GLSL
Shader "AIBIS/KiteFocusSprite"
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{
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Properties
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{
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[PerRendererData] _MainTex ("Sprite Texture", 2D) = "white" {}
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_Color ("Tint", Color) = (1, 1, 1, 1)
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[Header(Focus Blur)]
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_BlurAmount ("Blur Amount", Range(0, 1)) = 0
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_BlurSize ("Blur Size", Range(0, 0.05)) = 0.012
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[HideInInspector] _UseSoftFocus ("Use Soft Focus", Float) = 0
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_DefocusBloom ("Defocus Highlight Bloom", Range(0, 1)) = 0.32
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_HaloStrength ("Large Circle Halo", Range(0, 0.6)) = 0.22
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_ChromaticFringe ("Lens Color Fringe", Range(0, 0.6)) = 0.14
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_DefocusVeil ("Defocus White Veil", Range(0, 0.3)) = 0.055
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// Required for SpriteMask (same contract as Sprites-Default / UI.Mask)
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[HideInInspector][PerRendererData] _StencilComp ("Stencil Comparison", Float) = 8
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[HideInInspector][PerRendererData] _Stencil ("Stencil ID", Float) = 0
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[HideInInspector][PerRendererData] _StencilOp ("Stencil Operation", Float) = 0
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[HideInInspector][PerRendererData] _StencilWriteMask ("Stencil Write Mask", Float) = 255
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[HideInInspector][PerRendererData] _StencilReadMask ("Stencil Read Mask", Float) = 255
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[HideInInspector] _ColorMask ("Color Mask", Float) = 15
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}
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SubShader
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{
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Tags
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{
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"Queue" = "Transparent"
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"IgnoreProjector" = "True"
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"RenderType" = "Transparent"
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"PreviewType" = "Plane"
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"CanUseSpriteAtlas" = "True"
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}
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Cull Off
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Lighting Off
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ZWrite Off
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Blend One OneMinusSrcAlpha
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ColorMask [_ColorMask]
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Stencil
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{
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Ref [_Stencil]
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Comp [_StencilComp]
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Pass [_StencilOp]
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ReadMask [_StencilReadMask]
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WriteMask [_StencilWriteMask]
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}
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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 target 3.0
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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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float4 color : COLOR;
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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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float4 vertex : SV_POSITION;
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fixed4 color : COLOR;
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float2 uv : TEXCOORD0;
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};
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sampler2D _MainTex;
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float4 _MainTex_TexelSize;
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fixed4 _Color;
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float _BlurAmount;
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float _BlurSize;
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float _UseSoftFocus;
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float _DefocusBloom;
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float _HaloStrength;
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float _ChromaticFringe;
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float _DefocusVeil;
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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.color = v.color * _Color;
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o.uv = v.uv;
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return o;
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}
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half4 sampleTex(float2 uv)
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{
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// 边界外按透明，避免 saturate 夹边造成硬切
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if (uv.x < 0.0 || uv.x > 1.0 || uv.y < 0.0 || uv.y > 1.0)
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return half4(0, 0, 0, 0);
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return tex2D(_MainTex, uv);
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}
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half4 samplePremultiplied(float2 uv)
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{
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half4 color = sampleTex(uv);
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color.rgb *= color.a;
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return color;
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}
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// 圆形光圈核：比高斯更接近真实镜头的弥散圆，且不会出现十字形拖影。
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half4 ApertureDisc(float2 uv, float radius)
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{
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half4 result = samplePremultiplied(uv) * 0.12;
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const half w = 0.044;
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// 内圈
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result += samplePremultiplied(uv + float2( 0.38, 0.00) * radius) * w;
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result += samplePremultiplied(uv + float2(-0.38, 0.00) * radius) * w;
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result += samplePremultiplied(uv + float2( 0.00, 0.38) * radius) * w;
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result += samplePremultiplied(uv + float2( 0.00, -0.38) * radius) * w;
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result += samplePremultiplied(uv + float2( 0.27, 0.27) * radius) * w;
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result += samplePremultiplied(uv + float2(-0.27, 0.27) * radius) * w;
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result += samplePremultiplied(uv + float2( 0.27, -0.27) * radius) * w;
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result += samplePremultiplied(uv + float2(-0.27, -0.27) * radius) * w;
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// 外圈使用不规则角度，避免规则采样形成振铃或星芒。
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result += samplePremultiplied(uv + float2( 0.98, 0.05) * radius) * w;
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result += samplePremultiplied(uv + float2( 0.82, 0.55) * radius) * w;
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result += samplePremultiplied(uv + float2( 0.43, 0.90) * radius) * w;
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result += samplePremultiplied(uv + float2(-0.16, 0.98) * radius) * w;
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result += samplePremultiplied(uv + float2(-0.69, 0.72) * radius) * w;
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result += samplePremultiplied(uv + float2(-0.99, 0.10) * radius) * w;
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result += samplePremultiplied(uv + float2(-0.80, -0.58) * radius) * w;
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result += samplePremultiplied(uv + float2(-0.36, -0.92) * radius) * w;
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result += samplePremultiplied(uv + float2( 0.22, -0.97) * radius) * w;
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result += samplePremultiplied(uv + float2( 0.72, -0.68) * radius) * w;
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result += samplePremultiplied(uv + float2( 0.94, -0.31) * radius) * w;
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result += samplePremultiplied(uv + float2(-0.48, 0.86) * radius) * w;
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return result;
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}
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half4 WideHalo(float2 uv, float radius)
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{
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half4 result = 0;
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result += samplePremultiplied(uv + float2( 1.00, 0.00) * radius);
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result += samplePremultiplied(uv + float2( 0.71, 0.71) * radius);
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result += samplePremultiplied(uv + float2( 0.00, 1.00) * radius);
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result += samplePremultiplied(uv + float2(-0.71, 0.71) * radius);
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result += samplePremultiplied(uv + float2(-1.00, 0.00) * radius);
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result += samplePremultiplied(uv + float2(-0.71, -0.71) * radius);
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result += samplePremultiplied(uv + float2( 0.00, -1.00) * radius);
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result += samplePremultiplied(uv + float2( 0.71, -0.71) * radius);
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return result * 0.125;
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}
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half4 SoftFocusBlur(float2 uv, float radius)
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{
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float nearRadius = radius * 0.48;
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half4 result = samplePremultiplied(uv) * 0.20;
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result += samplePremultiplied(uv + float2( nearRadius, 0)) * 0.08;
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result += samplePremultiplied(uv + float2(-nearRadius, 0)) * 0.08;
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result += samplePremultiplied(uv + float2(0, nearRadius)) * 0.08;
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result += samplePremultiplied(uv + float2(0, -nearRadius)) * 0.08;
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result += samplePremultiplied(uv + float2( nearRadius, nearRadius)) * 0.055;
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result += samplePremultiplied(uv + float2(-nearRadius, nearRadius)) * 0.055;
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result += samplePremultiplied(uv + float2( nearRadius, -nearRadius)) * 0.055;
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result += samplePremultiplied(uv + float2(-nearRadius, -nearRadius)) * 0.055;
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result += samplePremultiplied(uv + float2( radius, 0)) * 0.04;
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result += samplePremultiplied(uv + float2(-radius, 0)) * 0.04;
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result += samplePremultiplied(uv + float2(0, radius)) * 0.04;
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result += samplePremultiplied(uv + float2(0, -radius)) * 0.04;
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result += samplePremultiplied(uv + float2( radius, radius)) * 0.025;
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result += samplePremultiplied(uv + float2(-radius, radius)) * 0.025;
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result += samplePremultiplied(uv + float2( radius, -radius)) * 0.025;
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result += samplePremultiplied(uv + float2(-radius, -radius)) * 0.025;
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return result;
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}
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fixed4 frag(v2f i) : SV_Target
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{
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float blurAmt = saturate(_BlurAmount);
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half4 sharp = sampleTex(i.uv);
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if (blurAmt < 0.001)
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{
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half4 col = sharp * i.color;
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col.rgb *= col.a;
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return col;
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}
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float2 texel = max(abs(_MainTex_TexelSize.xy), float2(1e-5, 1e-5));
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float radius = (length(texel) * 0.5 + _BlurSize) * (0.28 + blurAmt * 1.72);
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if (_UseSoftFocus > 0.5)
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{
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half4 softBlurred = SoftFocusBlur(i.uv, radius);
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half4 softSharp = sharp;
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softSharp.rgb *= softSharp.a;
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half4 softColor = lerp(softSharp, softBlurred, smoothstep(0.0, 1.0, blurAmt));
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softColor.rgb *= i.color.rgb * i.color.a;
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softColor.a *= i.color.a;
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return softColor;
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}
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half4 disc = ApertureDisc(i.uv, radius);
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half4 halo = WideHalo(i.uv, radius * 1.85);
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half4 blurred = lerp(disc, halo, saturate(_HaloStrength * blurAmt));
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// 很轻的 RGB 焦平面差异，避免单纯软件模糊的塑料感。
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float2 fringe = float2(0.73, 0.41) * radius * _ChromaticFringe * blurAmt;
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half4 fringeR = samplePremultiplied(i.uv + fringe);
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half4 fringeB = samplePremultiplied(i.uv - fringe);
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blurred.r = lerp(blurred.r, fringeR.r, _ChromaticFringe * blurAmt);
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blurred.b = lerp(blurred.b, fringeB.b, _ChromaticFringe * blurAmt);
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// 参考片中的失焦会让亮部扩散并稍微泛白，但保留在物体 alpha 内。
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half luminance = dot(blurred.rgb, half3(0.2126, 0.7152, 0.0722));
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half highlight = saturate(luminance - blurred.a * 0.42);
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blurred.rgb += highlight * _DefocusBloom * blurAmt;
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blurred.rgb += blurred.a * _DefocusVeil * blurAmt;
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half4 sharpPremul = sharp;
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sharpPremul.rgb *= sharpPremul.a;
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float mixT = smoothstep(0.0, 1.0, blurAmt);
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half4 col = lerp(sharpPremul, blurred, mixT);
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col.rgb *= i.color.rgb * i.color.a;
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col.a *= i.color.a;
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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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