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// Simplified SDF shader:
// - No Shading Option (bevel / bump / env map)
// - No Glow Option
// - Softness is applied on both side of the outline
Shader "TextMeshPro/Mobile/Distance Field Overlay" {
Properties {
[HDR]_FaceColor ("Face Color", Color) = (1,1,1,1)
_FaceDilate ("Face Dilate", Range(-1,1)) = 0
[HDR]_OutlineColor ("Outline Color", Color) = (0,0,0,1)
_OutlineWidth ("Outline Thickness", Range(0,1)) = 0
_OutlineSoftness ("Outline Softness", Range(0,1)) = 0
[HDR]_UnderlayColor ("Border Color", Color) = (0,0,0,.5)
_UnderlayOffsetX ("Border OffsetX", Range(-1,1)) = 0
_UnderlayOffsetY ("Border OffsetY", Range(-1,1)) = 0
_UnderlayDilate ("Border Dilate", Range(-1,1)) = 0
_UnderlaySoftness ("Border Softness", Range(0,1)) = 0
_WeightNormal ("Weight Normal", float) = 0
_WeightBold ("Weight Bold", float) = .5
_ShaderFlags ("Flags", float) = 0
_ScaleRatioA ("Scale RatioA", float) = 1
_ScaleRatioB ("Scale RatioB", float) = 1
_ScaleRatioC ("Scale RatioC", float) = 1
_MainTex ("Font Atlas", 2D) = "white" {}
_TextureWidth ("Texture Width", float) = 512
_TextureHeight ("Texture Height", float) = 512
_GradientScale ("Gradient Scale", float) = 5
_ScaleX ("Scale X", float) = 1
_ScaleY ("Scale Y", float) = 1
_PerspectiveFilter ("Perspective Correction", Range(0, 1)) = 0.875
_Sharpness ("Sharpness", Range(-1,1)) = 0
_VertexOffsetX ("Vertex OffsetX", float) = 0
_VertexOffsetY ("Vertex OffsetY", float) = 0
_ClipRect ("Clip Rect", vector) = (-32767, -32767, 32767, 32767)
_MaskSoftnessX ("Mask SoftnessX", float) = 0
_MaskSoftnessY ("Mask SoftnessY", float) = 0
_StencilComp ("Stencil Comparison", Float) = 8
_Stencil ("Stencil ID", Float) = 0
_StencilOp ("Stencil Operation", Float) = 0
_StencilWriteMask ("Stencil Write Mask", Float) = 255
_StencilReadMask ("Stencil Read Mask", Float) = 255
_CullMode ("Cull Mode", Float) = 0
_ColorMask ("Color Mask", Float) = 15
}
SubShader {
Tags
{
"Queue"="Overlay"
"IgnoreProjector"="True"
"RenderType"="Transparent"
}
Stencil
{
Ref [_Stencil]
Comp [_StencilComp]
Pass [_StencilOp]
ReadMask [_StencilReadMask]
WriteMask [_StencilWriteMask]
}
Cull [_CullMode]
ZWrite Off
Lighting Off
Fog { Mode Off }
ZTest Always
Blend One OneMinusSrcAlpha
ColorMask [_ColorMask]
Pass {
CGPROGRAM
#pragma vertex VertShader
#pragma fragment PixShader
#pragma shader_feature __ OUTLINE_ON
#pragma shader_feature __ UNDERLAY_ON UNDERLAY_INNER
#pragma multi_compile __ UNITY_UI_CLIP_RECT
#pragma multi_compile __ UNITY_UI_ALPHACLIP
#include "UnityCG.cginc"
#include "UnityUI.cginc"
#include "TMPro_Properties.cginc"
struct vertex_t {
UNITY_VERTEX_INPUT_INSTANCE_ID
float4 vertex : POSITION;
float3 normal : NORMAL;
fixed4 color : COLOR;
float2 texcoord0 : TEXCOORD0;
float2 texcoord1 : TEXCOORD1;
};
struct pixel_t {
UNITY_VERTEX_INPUT_INSTANCE_ID
UNITY_VERTEX_OUTPUT_STEREO
float4 vertex : SV_POSITION;
fixed4 faceColor : COLOR;
fixed4 outlineColor : COLOR1;
float4 texcoord0 : TEXCOORD0; // Texture UV, Mask UV
half4 param : TEXCOORD1; // Scale(x), BiasIn(y), BiasOut(z), Bias(w)
half4 mask : TEXCOORD2; // Position in clip space(xy), Softness(zw)
#if (UNDERLAY_ON | UNDERLAY_INNER)
float4 texcoord1 : TEXCOORD3; // Texture UV, alpha, reserved
half2 underlayParam : TEXCOORD4; // Scale(x), Bias(y)
#endif
};
pixel_t VertShader(vertex_t input)
{
pixel_t output;
UNITY_INITIALIZE_OUTPUT(pixel_t, output);
UNITY_SETUP_INSTANCE_ID(input);
UNITY_TRANSFER_INSTANCE_ID(input, output);
UNITY_INITIALIZE_VERTEX_OUTPUT_STEREO(output);
float bold = step(input.texcoord1.y, 0);
float4 vert = input.vertex;
vert.x += _VertexOffsetX;
vert.y += _VertexOffsetY;
float4 vPosition = UnityObjectToClipPos(vert);
float2 pixelSize = vPosition.w;
pixelSize /= float2(_ScaleX, _ScaleY) * abs(mul((float2x2)UNITY_MATRIX_P, _ScreenParams.xy));
float scale = rsqrt(dot(pixelSize, pixelSize));
scale *= abs(input.texcoord1.y) * _GradientScale * (_Sharpness + 1);
if(UNITY_MATRIX_P[3][3] == 0) scale = lerp(abs(scale) * (1 - _PerspectiveFilter), scale, abs(dot(UnityObjectToWorldNormal(input.normal.xyz), normalize(WorldSpaceViewDir(vert)))));
float weight = lerp(_WeightNormal, _WeightBold, bold) / 4.0;
weight = (weight + _FaceDilate) * _ScaleRatioA * 0.5;
float layerScale = scale;
scale /= 1 + (_OutlineSoftness * _ScaleRatioA * scale);
float bias = (0.5 - weight) * scale - 0.5;
float outline = _OutlineWidth * _ScaleRatioA * 0.5 * scale;
float opacity = input.color.a;
#if (UNDERLAY_ON | UNDERLAY_INNER)
opacity = 1.0;
#endif
fixed4 faceColor = fixed4(input.color.rgb, opacity) * _FaceColor;
faceColor.rgb *= faceColor.a;
fixed4 outlineColor = _OutlineColor;
outlineColor.a *= opacity;
outlineColor.rgb *= outlineColor.a;
outlineColor = lerp(faceColor, outlineColor, sqrt(min(1.0, (outline * 2))));
#if (UNDERLAY_ON | UNDERLAY_INNER)
layerScale /= 1 + ((_UnderlaySoftness * _ScaleRatioC) * layerScale);
float layerBias = (.5 - weight) * layerScale - .5 - ((_UnderlayDilate * _ScaleRatioC) * .5 * layerScale);
float x = -(_UnderlayOffsetX * _ScaleRatioC) * _GradientScale / _TextureWidth;
float y = -(_UnderlayOffsetY * _ScaleRatioC) * _GradientScale / _TextureHeight;
float2 layerOffset = float2(x, y);
#endif
// Generate UV for the Masking Texture
float4 clampedRect = clamp(_ClipRect, -2e10, 2e10);
float2 maskUV = (vert.xy - clampedRect.xy) / (clampedRect.zw - clampedRect.xy);
// Populate structure for pixel shader
output.vertex = vPosition;
output.faceColor = faceColor;
output.outlineColor = outlineColor;
output.texcoord0 = float4(input.texcoord0.x, input.texcoord0.y, maskUV.x, maskUV.y);
output.param = half4(scale, bias - outline, bias + outline, bias);
output.mask = half4(vert.xy * 2 - clampedRect.xy - clampedRect.zw, 0.25 / (0.25 * half2(_MaskSoftnessX, _MaskSoftnessY) + pixelSize.xy));
#if (UNDERLAY_ON || UNDERLAY_INNER)
output.texcoord1 = float4(input.texcoord0 + layerOffset, input.color.a, 0);
output.underlayParam = half2(layerScale, layerBias);
#endif
return output;
}
// PIXEL SHADER
fixed4 PixShader(pixel_t input) : SV_Target
{
UNITY_SETUP_INSTANCE_ID(input);
half d = tex2D(_MainTex, input.texcoord0.xy).a * input.param.x;
half4 c = input.faceColor * saturate(d - input.param.w);
#ifdef OUTLINE_ON
c = lerp(input.outlineColor, input.faceColor, saturate(d - input.param.z));
c *= saturate(d - input.param.y);
#endif
#if UNDERLAY_ON
d = tex2D(_MainTex, input.texcoord1.xy).a * input.underlayParam.x;
c += float4(_UnderlayColor.rgb * _UnderlayColor.a, _UnderlayColor.a) * saturate(d - input.underlayParam.y) * (1 - c.a);
#endif
#if UNDERLAY_INNER
half sd = saturate(d - input.param.z);
d = tex2D(_MainTex, input.texcoord1.xy).a * input.underlayParam.x;
c += float4(_UnderlayColor.rgb * _UnderlayColor.a, _UnderlayColor.a) * (1 - saturate(d - input.underlayParam.y)) * sd * (1 - c.a);
#endif
// Alternative implementation to UnityGet2DClipping with support for softness.
#if UNITY_UI_CLIP_RECT
half2 m = saturate((_ClipRect.zw - _ClipRect.xy - abs(input.mask.xy)) * input.mask.zw);
c *= m.x * m.y;
#endif
#if (UNDERLAY_ON | UNDERLAY_INNER)
c *= input.texcoord1.z;
#endif
#if UNITY_UI_ALPHACLIP
clip(c.a - 0.001);
#endif
return c;
}
ENDCG
}
}
CustomEditor "TMPro.EditorUtilities.TMP_SDFShaderGUI"
}
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