120 lines
3.5 KiB
HLSL
120 lines
3.5 KiB
HLSL
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#ifndef SPINE_OUTLINE_PASS_INCLUDED
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#define SPINE_OUTLINE_PASS_INCLUDED
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#include "UnityCG.cginc"
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#ifdef SKELETON_GRAPHIC
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#include "UnityUI.cginc"
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#endif
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sampler2D _MainTex;
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float _OutlineWidth;
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float4 _OutlineColor;
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float4 _MainTex_TexelSize;
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float _ThresholdEnd;
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float _OutlineSmoothness;
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float _OutlineMipLevel;
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int _OutlineReferenceTexWidth;
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#ifdef SKELETON_GRAPHIC
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float4 _ClipRect;
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#endif
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struct VertexInput {
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float4 vertex : POSITION;
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float2 uv : TEXCOORD0;
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float4 vertexColor : COLOR;
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UNITY_VERTEX_INPUT_INSTANCE_ID
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};
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struct VertexOutput {
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float4 pos : SV_POSITION;
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float2 uv : TEXCOORD0;
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float vertexColorAlpha : COLOR;
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#ifdef SKELETON_GRAPHIC
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float4 worldPosition : TEXCOORD1;
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#endif
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UNITY_VERTEX_OUTPUT_STEREO
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};
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#ifdef SKELETON_GRAPHIC
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VertexOutput vertOutlineGraphic(VertexInput v) {
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VertexOutput o;
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UNITY_SETUP_INSTANCE_ID(v);
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UNITY_INITIALIZE_VERTEX_OUTPUT_STEREO(o);
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o.worldPosition = v.vertex;
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o.pos = UnityObjectToClipPos(o.worldPosition);
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o.uv = v.uv;
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#ifdef UNITY_HALF_TEXEL_OFFSET
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o.pos.xy += (_ScreenParams.zw - 1.0) * float2(-1, 1);
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#endif
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o.vertexColorAlpha = v.vertexColor.a;
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return o;
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}
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#else // !SKELETON_GRAPHIC
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VertexOutput vertOutline(VertexInput v) {
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VertexOutput o;
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UNITY_SETUP_INSTANCE_ID(v);
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UNITY_INITIALIZE_VERTEX_OUTPUT_STEREO(o);
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o.pos = UnityObjectToClipPos(v.vertex);
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o.uv = v.uv;
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o.vertexColorAlpha = v.vertexColor.a;
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return o;
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}
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#endif
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float4 fragOutline(VertexOutput i) : SV_Target {
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float4 texColor = fixed4(0,0,0,0);
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float outlineWidthCompensated = _OutlineWidth / (_OutlineReferenceTexWidth * _MainTex_TexelSize.x);
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float xOffset = _MainTex_TexelSize.x * outlineWidthCompensated;
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float yOffset = _MainTex_TexelSize.y * outlineWidthCompensated;
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float xOffsetDiagonal = _MainTex_TexelSize.x * outlineWidthCompensated * 0.7;
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float yOffsetDiagonal = _MainTex_TexelSize.y * outlineWidthCompensated * 0.7;
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float pixelCenter = tex2D(_MainTex, i.uv).a;
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float4 uvCenterWithLod = float4(i.uv, 0, _OutlineMipLevel);
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float pixelTop = tex2Dlod(_MainTex, uvCenterWithLod + float4(0, yOffset, 0, 0)).a;
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float pixelBottom = tex2Dlod(_MainTex, uvCenterWithLod + float4(0, -yOffset, 0, 0)).a;
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float pixelLeft = tex2Dlod(_MainTex, uvCenterWithLod + float4(-xOffset, 0, 0, 0)).a;
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float pixelRight = tex2Dlod(_MainTex, uvCenterWithLod + float4(xOffset, 0, 0, 0)).a;
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#if _USE8NEIGHBOURHOOD_ON
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float numSamples = 8;
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float pixelTopLeft = tex2Dlod(_MainTex, uvCenterWithLod + float4(-xOffsetDiagonal, yOffsetDiagonal, 0, 0)).a;
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float pixelTopRight = tex2Dlod(_MainTex, uvCenterWithLod + float4(xOffsetDiagonal, yOffsetDiagonal, 0, 0)).a;
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float pixelBottomLeft = tex2Dlod(_MainTex, uvCenterWithLod + float4(-xOffsetDiagonal, -yOffsetDiagonal, 0, 0)).a;
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float pixelBottomRight = tex2Dlod(_MainTex, uvCenterWithLod + float4(xOffsetDiagonal, -yOffsetDiagonal, 0, 0)).a;
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float average = (pixelTop + pixelBottom + pixelLeft + pixelRight +
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pixelTopLeft + pixelTopRight + pixelBottomLeft + pixelBottomRight)
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* i.vertexColorAlpha / numSamples;
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#else // 4 neighbourhood
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float numSamples = 1;
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float average = (pixelTop + pixelBottom + pixelLeft + pixelRight) * i.vertexColorAlpha / numSamples;
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#endif
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float thresholdStart = _ThresholdEnd * (1.0 - _OutlineSmoothness);
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float outlineAlpha = saturate((average - thresholdStart) / (_ThresholdEnd - thresholdStart)) - pixelCenter;
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texColor.rgba = lerp(texColor, _OutlineColor, outlineAlpha);
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#ifdef SKELETON_GRAPHIC
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texColor *= UnityGet2DClipping(i.worldPosition.xy, _ClipRect);
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#endif
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return texColor;
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}
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#endif // SPINE_OUTLINE_PASS_INCLUDED
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