textmeshpro 放大缩小出现黑色边框问题，修改shader
TMPro.cginc
float2 UnpackUV(float uv)
{
float2 output;
output.x = floor(uv / 4096);
output.y = uv - 4096 * output.x;
return output * 0.001953125;
}
// d 字母部分为0， 边缘为1， 带扩散， 外部> 1, 摄像机离远减弱
// outline 字体与外框均为 》 1 的值， 离远减弱，范围 0～》1
// 如此 d - outline 的话，
// 离远 外框出现半透明黑色，说明透明度不为0, alpha 计算是通过 faceColor *= faceAlpha;
// softness 是设置的值， 0～1
// 说明 上述 1-saturate((d - outline * 0.5 + softness * 0.5) / (1.0 + softness)); 这个过程不为0
// 两种情况
/*
1. 当处于字母区域 d = 0, (d - outline * 0.5 + softness * 0.5) 为负数， 1- 0 = 1， faceAlpha 为1
2. 当处于边缘区域, 假如想要透明，则 1- saturate((d - outline * 0.5 + softness * 0.5) / (1.0 + softness)); 《= 0
- 则 saturate((d - outline * 0.5 + softness * 0.5) / (1.0 + softness)); >=1
- (d - outline * 0.5 + softness * 0.5) / (1.0 + softness) > 1
- (d - outline * 0.5 + softness * 0.5) > 1.0 + softness
- d - outline * 0.5 > 1.0 + softness * 0.5
- d > 1.0 + softness * 0.5 + outline * 0.5
查看上层 sd 和 outline 的都是根据 scale 计算的， 所以, y = ax + b; 当 x (scale) 变化， 则 Ydt = (a2-a1)x + (b2-b1);
所以其实是 差距会越来越大， scale 小的时候，差距会小，导致出现黑色边框。 所以缩放动画出现问题。
查到问题，saturate((d - outline * 0.5 + softness * 0.5) / (1 + softness)) 最大值 = bias， 所以需要 调整范围到 0～1 到 alpha 范围
*/
fixed4 GetColor(half d, fixed4 faceColor, fixed4 outlineColor, half outline, half softness)
{
half faceAlpha = 1-saturate((d - outline * 0.5 + softness * 0.5) / (1 + softness));
half outlineAlpha = saturate((d + outline * 0.5)) * sqrt(min(1.0, outline));
faceColor.rgb *= faceColor.a;
outlineColor.rgb *= outlineColor.a;
faceColor = lerp(faceColor, outlineColor, outlineAlpha);
faceColor *= faceAlpha;
return faceColor;
}
fixed4 GetColorBias(half d, fixed4 faceColor, fixed4 outlineColor, half outline, half softness, half bias)
{
half faceAlpha = 1-saturate((d - outline * 0.5 + softness * 0.5) / (1 + softness) / bias);
half outlineAlpha = saturate((d + outline * 0.5)) * sqrt(min(1.0, outline));
faceColor.rgb *= faceColor.a;
outlineColor.rgb *= outlineColor.a;
faceColor = lerp(faceColor, outlineColor, outlineAlpha);
faceColor *= faceAlpha;
return faceColor;
}
float3 GetSurfaceNormal(float4 h, float bias)
{
bool raisedBevel = step(1, fmod(_ShaderFlags, 2));
h += bias+_BevelOffset;
float bevelWidth = max(.01, _OutlineWidth+_BevelWidth);
// Track outline
h -= .5;
h /= bevelWidth;
h = saturate(h+.5);
if(raisedBevel) h = 1 - abs(h*2.0 - 1.0);
h = lerp(h, sin(h*3.141592/2.0), _BevelRoundness);
h = min(h, 1.0-_BevelClamp);
h *= _Bevel * bevelWidth * _GradientScale * -2.0;
float3 va = normalize(float3(1.0, 0.0, h.y - h.x));
float3 vb = normalize(float3(0.0, -1.0, h.w - h.z));
return cross(va, vb);
}
float3 GetSurfaceNormal(float2 uv, float bias, float3 delta)
{
// Read "height field"
float4 h = {tex2D(_MainTex, uv - delta.xz).a,
tex2D(_MainTex, uv + delta.xz).a,
tex2D(_MainTex, uv - delta.zy).a,
tex2D(_MainTex, uv + delta.zy).a};
return GetSurfaceNormal(h, bias);
}
float3 GetSpecular(float3 n, float3 l)
{
float spec = pow(max(0.0, dot(n, l)), _Reflectivity);
return _SpecularColor.rgb * spec * _SpecularPower;
}
float4 GetGlowColor(float d, float scale)
{
float glow = d - (_GlowOffset*_ScaleRatioB) * 0.5 * scale;
float t = lerp(_GlowInner, (_GlowOuter * _ScaleRatioB), step(0.0, glow)) * 0.5 * scale;
glow = saturate(abs(glow/(1.0 + t)));
glow = 1.0-pow(glow, _GlowPower);
glow *= sqrt(min(1.0, t)); // Fade off glow thinner than 1 screen pixel
return float4(_GlowColor.rgb, saturate(_GlowColor.a * glow * 2));
}
float4 BlendARGB(float4 overlying, float4 underlying)
{
overlying.rgb *= overlying.a;
underlying.rgb *= underlying.a;
float3 blended = overlying.rgb + ((1-overlying.a)*underlying.rgb);
float alpha = underlying.a + (1-underlying.a)*overlying.a;
return float4(blended, alpha);
}
TMP_SDF.shader
Shader "TextMeshPro/Distance Field" {
Properties {
_FaceTex ("Face Texture", 2D) = "white" {}
_FaceUVSpeedX ("Face UV Speed X", Range(-5, 5)) = 0.0
_FaceUVSpeedY ("Face UV Speed Y", Range(-5, 5)) = 0.0
[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)
_OutlineTex ("Outline Texture", 2D) = "white" {}
_OutlineUVSpeedX ("Outline UV Speed X", Range(-5, 5)) = 0.0
_OutlineUVSpeedY ("Outline UV Speed Y", Range(-5, 5)) = 0.0
_OutlineWidth ("Outline Thickness", Range(0, 1)) = 0
_OutlineSoftness ("Outline Softness", Range(0,1)) = 0
_Bevel ("Bevel", Range(0,1)) = 0.5
_BevelOffset ("Bevel Offset", Range(-0.5,0.5)) = 0
_BevelWidth ("Bevel Width", Range(-.5,0.5)) = 0
_BevelClamp ("Bevel Clamp", Range(0,1)) = 0
_BevelRoundness ("Bevel Roundness", Range(0,1)) = 0
_LightAngle ("Light Angle", Range(0.0, 6.2831853)) = 3.1416
[HDR]_SpecularColor ("Specular", Color) = (1,1,1,1)
_SpecularPower ("Specular", Range(0,4)) = 2.0
_Reflectivity ("Reflectivity", Range(5.0,15.0)) = 10
_Diffuse ("Diffuse", Range(0,1)) = 0.5
_Ambient ("Ambient", Range(1,0)) = 0.5
_BumpMap ("Normal map", 2D) = "bump" {}
_BumpOutline ("Bump Outline", Range(0,1)) = 0
_BumpFace ("Bump Face", Range(0,1)) = 0
_ReflectFaceColor ("Reflection Color", Color) = (0,0,0,1)
_ReflectOutlineColor("Reflection Color", Color) = (0,0,0,1)
_Cube ("Reflection Cubemap", Cube) = "black" { /* TexGen CubeReflect */ }
_EnvMatrixRotation ("Texture Rotation", vector) = (0, 0, 0, 0)
[HDR]_UnderlayColor ("Border Color", Color) = (0,0,0, 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
[HDR]_GlowColor ("Color", Color) = (0, 1, 0, 0.5)
_GlowOffset ("Offset", Range(-1,1)) = 0
_GlowInner ("Inner", Range(0,1)) = 0.05
_GlowOuter ("Outer", Range(0,1)) = 0.05
_GlowPower ("Falloff", Range(1, 0)) = 0.75
_WeightNormal ("Weight Normal", float) = 0
_WeightBold ("Weight Bold", float) = 0.5
_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) = 5.0
_ScaleX ("Scale X", float) = 1.0
_ScaleY ("Scale Y", float) = 1.0
_PerspectiveFilter ("Perspective Correction", Range(0, 1)) = 0.875
_Sharpness ("Sharpness", Range(-1,1)) = 0
_VertexOffsetX ("Vertex OffsetX", float) = 0
_VertexOffsetY ("Vertex OffsetY", float) = 0
_MaskCoord ("Mask Coordinates", vector) = (0, 0, 32767, 32767)
_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"="Transparent"
"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 [unity_GUIZTestMode]
Blend One OneMinusSrcAlpha
ColorMask [_ColorMask]
Pass {
CGPROGRAM
#pragma target 3.0
#pragma vertex VertShader
#pragma fragment PixShader
#pragma shader_feature __ BEVEL_ON
#pragma shader_feature __ UNDERLAY_ON UNDERLAY_INNER
#pragma shader_feature __ GLOW_ON
#pragma multi_compile __ UNITY_UI_CLIP_RECT
#pragma multi_compile __ UNITY_UI_ALPHACLIP
#include "UnityCG.cginc"
#include "UnityUI.cginc"
#include "TMPro_Properties.cginc"
#include "TMPro.cginc"
struct vertex_t {
UNITY_VERTEX_INPUT_INSTANCE_ID
float4 position : 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 position : SV_POSITION;
fixed4 color : COLOR;
float2 atlas : TEXCOORD0; // Atlas
float4 param : TEXCOORD1; // alphaClip, scale, bias, weight
float4 mask : TEXCOORD2; // Position in object space(xy), pixel Size(zw)
float3 viewDir : TEXCOORD3;
#if (UNDERLAY_ON || UNDERLAY_INNER)
float4 texcoord2 : TEXCOORD4; // u,v, scale, bias
fixed4 underlayColor : COLOR1;
#endif
float4 textures : TEXCOORD5;
};
// Used by Unity internally to handle Texture Tiling and Offset.
float4 _FaceTex_ST;
float4 _OutlineTex_ST;
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.position;
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 bias =(.5 - weight) + (.5 / scale);
float alphaClip = (1.0 - _OutlineWidth * _ScaleRatioA - _OutlineSoftness * _ScaleRatioA);
#if GLOW_ON
alphaClip = min(alphaClip, 1.0 - _GlowOffset * _ScaleRatioB - _GlowOuter * _ScaleRatioB);
#endif
alphaClip = alphaClip / 2.0 - ( .5 / scale) - weight;
#if (UNDERLAY_ON || UNDERLAY_INNER)
float4 underlayColor = _UnderlayColor;
underlayColor.rgb *= underlayColor.a;
float bScale = scale;
bScale /= 1 + ((_UnderlaySoftness*_ScaleRatioC) * bScale);
float bBias = (0.5 - weight) * bScale - 0.5 - ((_UnderlayDilate * _ScaleRatioC) * 0.5 * bScale);
float x = -(_UnderlayOffsetX * _ScaleRatioC) * _GradientScale / _TextureWidth;
float y = -(_UnderlayOffsetY * _ScaleRatioC) * _GradientScale / _TextureHeight;
float2 bOffset = 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);
// Support for texture tiling and offset
float2 textureUV = UnpackUV(input.texcoord1.x);
float2 faceUV = TRANSFORM_TEX(textureUV, _FaceTex);
float2 outlineUV = TRANSFORM_TEX(textureUV, _OutlineTex);
output.position = vPosition;
output.color = input.color;
output.atlas = input.texcoord0;
output.param = float4(alphaClip, scale, bias, weight);
output.mask = half4(vert.xy * 2 - clampedRect.xy - clampedRect.zw, 0.25 / (0.25 * half2(_MaskSoftnessX, _MaskSoftnessY) + pixelSize.xy));
output.viewDir = mul((float3x3)_EnvMatrix, _WorldSpaceCameraPos.xyz - mul(unity_ObjectToWorld, vert).xyz);
#if (UNDERLAY_ON || UNDERLAY_INNER)
output.texcoord2 = float4(input.texcoord0 + bOffset, bScale, bBias);
output.underlayColor = underlayColor;
#endif
output.textures = float4(faceUV, outlineUV);
return output;
}
fixed4 PixShader(pixel_t input) : SV_Target
{
UNITY_SETUP_INSTANCE_ID(input);
float c = tex2D(_MainTex, input.atlas).a;
#ifndef UNDERLAY_ON
clip(c - input.param.x);
#endif
float scale = input.param.y;
float bias = input.param.z;
float weight = input.param.w;
float sd = (bias - c) * scale;
float outline = (_OutlineWidth * _ScaleRatioA) * scale;
float softness = (_OutlineSoftness * _ScaleRatioA) * scale;
half4 faceColor = _FaceColor;
half4 outlineColor = _OutlineColor;
faceColor.rgb *= input.color.rgb;
faceColor *= tex2D(_FaceTex, input.textures.xy + float2(_FaceUVSpeedX, _FaceUVSpeedY) * _Time.y);
outlineColor *= tex2D(_OutlineTex, input.textures.zw + float2(_OutlineUVSpeedX, _OutlineUVSpeedY) * _Time.y);
faceColor = GetColorBias(sd, faceColor, outlineColor, outline, softness, bias);
#if BEVEL_ON
float3 dxy = float3(0.5 / _TextureWidth, 0.5 / _TextureHeight, 0);
float3 n = GetSurfaceNormal(input.atlas, weight, dxy);
float3 bump = UnpackNormal(tex2D(_BumpMap, input.textures.xy + float2(_FaceUVSpeedX, _FaceUVSpeedY) * _Time.y)).xyz;
bump *= lerp(_BumpFace, _BumpOutline, saturate(sd + outline * 0.5));
n = normalize(n- bump);
float3 light = normalize(float3(sin(_LightAngle), cos(_LightAngle), -1.0));
float3 col = GetSpecular(n, light);
faceColor.rgb += col*faceColor.a;
faceColor.rgb *= 1-(dot(n, light)*_Diffuse);
faceColor.rgb *= lerp(_Ambient, 1, n.z*n.z);
fixed4 reflcol = texCUBE(_Cube, reflect(input.viewDir, -n));
faceColor.rgb += reflcol.rgb * lerp(_ReflectFaceColor.rgb, _ReflectOutlineColor.rgb, saturate(sd + outline * 0.5)) * faceColor.a;
#endif
#if UNDERLAY_ON
float d = tex2D(_MainTex, input.texcoord2.xy).a * input.texcoord2.z;
faceColor += input.underlayColor * saturate(d - input.texcoord2.w) * (1 - faceColor.a);
#endif
#if UNDERLAY_INNER
float d = tex2D(_MainTex, input.texcoord2.xy).a * input.texcoord2.z;
faceColor += input.underlayColor * (1 - saturate(d - input.texcoord2.w)) * saturate(1 - sd) * (1 - faceColor.a);
#endif
#if GLOW_ON
float4 glowColor = GetGlowColor(sd, scale);
faceColor.rgb += glowColor.rgb * glowColor.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);
faceColor *= m.x * m.y;
#endif
#if UNITY_UI_ALPHACLIP
clip(faceColor.a - 0.001);
#endif
return faceColor * input.color.a;
}
ENDCG
}
}
Fallback "TextMeshPro/Mobile/Distance Field"
CustomEditor "TMPro.EditorUtilities.TMP_SDFShaderGUI"
}
TMP_SDF-Mobile.shader
// 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" {
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"="Transparent"
"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 [unity_GUIZTestMode]
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 - saturate(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"
}
其中 TMP_SDF.shader TMPro.cginc 修改是相似的计算，缩放很小还是会出现，但看效果已经可以忽略了。
TMP_SDF-Mobile.shader 计算没有问题（应该😊）
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