302 lines
10 KiB
GLSL
Executable File
302 lines
10 KiB
GLSL
Executable File
// Simplified SDF shader:
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// - No Shading Option (bevel / bump / env map)
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// - No Glow Option
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// - Softness is applied on both side of the outline
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Shader "TextMeshPro/Mobile/Distance Field/Decal Text" {
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Properties {
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[HDR]_FaceColor ("Face Color", Color) = (1,1,1,1)
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_Color ("Color", Color) = (1,1,1,1)
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_FaceDilate ("Face Dilate", Range(-1,1)) = 0
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[HDR]_OutlineColor ("Outline Color", Color) = (0,0,0,1)
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_OutlineWidth ("Outline Thickness", Range(0,1)) = 0
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_OutlineSoftness ("Outline Softness", Range(0,1)) = 0
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[HDR]_UnderlayColor ("Border Color", Color) = (0,0,0,.5)
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_UnderlayOffsetX ("Border OffsetX", Range(-1,1)) = 0
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_UnderlayOffsetY ("Border OffsetY", Range(-1,1)) = 0
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_UnderlayDilate ("Border Dilate", Range(-1,1)) = 0
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_UnderlaySoftness ("Border Softness", Range(0,1)) = 0
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_WeightNormal ("Weight Normal", float) = 0
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_WeightBold ("Weight Bold", float) = .5
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_ShaderFlags ("Flags", float) = 0
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_ScaleRatioA ("Scale RatioA", float) = 1
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_ScaleRatioB ("Scale RatioB", float) = 1
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_ScaleRatioC ("Scale RatioC", float) = 1
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_MainTex ("Font Atlas", 2D) = "white" {}
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_TextureWidth ("Texture Width", float) = 512
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_TextureHeight ("Texture Height", float) = 512
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_GradientScale ("Gradient Scale", float) = 5
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_ScaleX ("Scale X", float) = 1
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_ScaleY ("Scale Y", float) = 1
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_PerspectiveFilter ("Perspective Correction", Range(0, 1)) = 0.875
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_Sharpness ("Sharpness", Range(-1,1)) = 0
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_VertexOffsetX ("Vertex OffsetX", float) = 0
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_VertexOffsetY ("Vertex OffsetY", float) = 0
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_ClipRect ("Clip Rect", vector) = (-32767, -32767, 32767, 32767)
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_MaskSoftnessX ("Mask SoftnessX", float) = 0
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_MaskSoftnessY ("Mask SoftnessY", float) = 0
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_StencilComp ("Stencil Comparison", Float) = 8
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_Stencil ("Stencil ID", Float) = 0
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_StencilOp ("Stencil Operation", Float) = 0
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_StencilWriteMask ("Stencil Write Mask", Float) = 255
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_StencilReadMask ("Stencil Read Mask", Float) = 255
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_CullMode ("Cull Mode", Float) = 0
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_ColorMask ("Color Mask", Float) = 15
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}
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SubShader {
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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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}
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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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Cull [_CullMode]
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ZWrite Off
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Lighting Off
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Fog { Mode Off }
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ZTest [unity_GUIZTestMode]
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Blend One OneMinusSrcAlpha
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ColorMask [_ColorMask]
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Pass {
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HLSLPROGRAM
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#pragma vertex VertShader
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#pragma fragment PixShader
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#pragma shader_feature __ OUTLINE_ON
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#pragma shader_feature __ UNDERLAY_ON UNDERLAY_INNER
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#pragma multi_compile __ UNITY_UI_CLIP_RECT
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#pragma multi_compile __ UNITY_UI_ALPHACLIP
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#include "Packages/com.unity.render-pipelines.universal/ShaderLibrary/DeclareDepthTexture.hlsl"
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#include "Packages/com.unity.render-pipelines.universal/ShaderLibrary/Core.hlsl"
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CBUFFER_START(UnityPerMaterial)
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uniform float4 _Color;
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#include "TMPro_Properties.cginc"
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CBUFFER_END
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struct vertex_t {
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UNITY_VERTEX_INPUT_INSTANCE_ID
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float3 vertex : POSITION;
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float3 normal : NORMAL;
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float4 color : COLOR;
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float2 texcoord0 : TEXCOORD0;
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float2 texcoord1 : TEXCOORD1;
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float2 texcoord3 : TEXCOORD3; // vertex left bottom position
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float2 texcoord4 : TEXCOORD4; // UV left bottom position
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float2 texcoord5 : TEXCOORD5; // vertex width, height
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float2 texcoord6 : TEXCOORD6; // UV width, height
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float2 texcoord7 : TEXCOORD7; // rotation (x - angle)
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};
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struct pixel_t {
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UNITY_VERTEX_INPUT_INSTANCE_ID
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UNITY_VERTEX_OUTPUT_STEREO
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float4 vertex : SV_POSITION;
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float4 faceColor : COLOR;
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float4 outlineColor : COLOR1;
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float4 texcoord0 : TEXCOORD0; // Texture UV, Mask UV
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half4 param : TEXCOORD1; // Scale(x), BiasIn(y), BiasOut(z), Bias(w)
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half4 mask : TEXCOORD2; // Position in clip space(xy), Softness(zw)
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#if (UNDERLAY_ON | UNDERLAY_INNER)
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float4 texcoord1 : TEXCOORD3; // Texture UV, alpha, reserved
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half2 underlayParam : TEXCOORD4; // Scale(x), Bias(y)
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#endif
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float4 vert_data : TEXCOORD5; // vertex left bottom position (x, y), vertex width (z), height (w)
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float4 uv_data : TEXCOORD6; // UV left bottom position (x, y), UV width (z), height (w)
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float2 rot_data : TEXCOORD7; // sin(a), cos(a)
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};
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pixel_t VertShader(vertex_t input)
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{
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pixel_t output = (pixel_t)0;
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UNITY_SETUP_INSTANCE_ID(input);
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UNITY_TRANSFER_INSTANCE_ID(input, output);
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UNITY_INITIALIZE_VERTEX_OUTPUT_STEREO(output);
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float bold = step(input.texcoord1.y, 0);
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float3 vert = input.vertex;
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vert.x += _VertexOffsetX;
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vert.y += _VertexOffsetY;
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float4 vPosition = GetVertexPositionInputs(input.vertex).positionCS;
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float2 pixelSize = vPosition.w;
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pixelSize /= float2(_ScaleX, _ScaleY) * abs(mul((float2x2)UNITY_MATRIX_P, _ScreenParams.xy));
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float scale = rsqrt(dot(pixelSize, pixelSize));
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scale *= abs(input.texcoord1.y) * _GradientScale * (_Sharpness + 1);
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if(UNITY_MATRIX_P[3][3] == 0) scale = lerp(abs(scale) * (1 - _PerspectiveFilter), scale, abs(dot(TransformObjectToWorld(input.normal.xyz), normalize(TransformWorldToViewDir(vert)))));
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float weight = lerp(_WeightNormal, _WeightBold, bold) / 4.0;
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weight = (weight + _FaceDilate) * _ScaleRatioA * 0.5;
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float layerScale = scale;
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scale /= 1 + (_OutlineSoftness * _ScaleRatioA * scale);
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float bias = (0.5 - weight) * scale - 0.5;
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float outline = _OutlineWidth * _ScaleRatioA * 0.5 * scale;
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float opacity = input.color.a;
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#if (UNDERLAY_ON | UNDERLAY_INNER)
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opacity = 1.0;
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#endif
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_FaceColor.a = min(_FaceColor.a, _Color.a);
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float4 faceColor = float4(input.color.rgb, opacity) * _FaceColor;
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faceColor.rgb *= faceColor.a;
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float4 outlineColor = _OutlineColor;
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outlineColor.a *= opacity;
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outlineColor.rgb *= outlineColor.a;
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outlineColor = lerp(faceColor, outlineColor, sqrt(min(1.0, (outline * 2))));
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#if (UNDERLAY_ON | UNDERLAY_INNER)
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layerScale /= 1 + ((_UnderlaySoftness * _ScaleRatioC) * layerScale);
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float layerBias = (.5 - weight) * layerScale - .5 - ((_UnderlayDilate * _ScaleRatioC) * .5 * layerScale);
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float x = -(_UnderlayOffsetX * _ScaleRatioC) * _GradientScale / _TextureWidth;
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float y = -(_UnderlayOffsetY * _ScaleRatioC) * _GradientScale / _TextureHeight;
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float2 layerOffset = float2(x, y);
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#endif
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// Generate UV for the Masking Texture
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float4 clampedRect = clamp(_ClipRect, -2e10, 2e10);
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float2 maskUV = (vert.xy - clampedRect.xy) / (clampedRect.zw - clampedRect.xy);
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// Populate structure for pixel shader
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output.vertex = vPosition;
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output.faceColor = faceColor;
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output.outlineColor = outlineColor;
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output.texcoord0 = float4(input.texcoord0.x, input.texcoord0.y, maskUV.x, maskUV.y);
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output.param = half4(scale, bias - outline, bias + outline, bias);
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output.mask = half4(vert.xy * 2 - clampedRect.xy - clampedRect.zw, 0.25 / (0.25 * half2(_MaskSoftnessX, _MaskSoftnessY) + pixelSize.xy));
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#if (UNDERLAY_ON || UNDERLAY_INNER)
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output.texcoord1 = float4(input.texcoord0 + layerOffset, input.color.a, 0);
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output.underlayParam = half2(layerScale, layerBias);
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#endif
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output.vert_data = float4(input.texcoord3.xy, input.texcoord5.xy);
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output.uv_data = float4(input.texcoord4.xy, input.texcoord6.xy);
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const float angle = input.texcoord7.x;
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output.rot_data = float2(sin(angle), cos(angle));
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return output;
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}
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float invLerp(const float from, const float to, const float value)
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{
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return (value - from) / (to - from);
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}
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float remap(const float origFrom, const float origTo, const float targetFrom, const float targetTo, const float value)
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{
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const float rel = invLerp(origFrom, origTo, value);
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return lerp(targetFrom, targetTo, rel);
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}
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float3 rotate(const float3 input, float2 m)
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{
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const float c = m.y; // cos(a)
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const float s = m.x; // sin(a)
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return mul(input, float3x3(c,-s, 0, s, c , 0, 0, 0, 1));
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}
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// PIXEL SHADER
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float4 PixShader(pixel_t input) : SV_Target
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{
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UNITY_SETUP_INSTANCE_ID(input);
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// decal start
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const float2 uv = (input.vertex.xy / _ScaledScreenParams.xy);
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#if UNITY_REVERSED_Z
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float depth = SampleSceneDepth(uv);
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#else
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// Adjust Z to match NDC for OpenGL ([-1, 1])
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float depth = lerp(UNITY_NEAR_CLIP_VALUE, 1, SampleSceneDepth(uv));
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#endif
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const float3 world_pos = ComputeWorldSpacePosition(uv, depth, UNITY_MATRIX_I_VP);
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float3 local_pos = TransformWorldToObject(world_pos);
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// move local space to left bottom vertex position
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local_pos -= float3(input.vert_data.xy, 0);
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local_pos = rotate(local_pos,input.rot_data);
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const float width = input.vert_data.z;
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const float height = input.vert_data.w;
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float4 decal_clip = float4(0, 0, 1, 1);
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decal_clip.x = step(0, local_pos.x) * (1 - step(width, local_pos.x));
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decal_clip.y = step(0, local_pos.y) * (1 - step(height, local_pos.y));
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// remap from (0..vertex_size) to (uv.start..uv.end)
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local_pos.x = remap(0, width, input.uv_data.x, input.uv_data.x + input.uv_data.z, local_pos.x);
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local_pos.y = remap(0, height, input.uv_data.y, input.uv_data.y + input.uv_data.w, local_pos.y);
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// decal end
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// half d = tex2D(_MainTex, input.texcoord0.xy).a * input.param.x;
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half d = tex2D(_MainTex, local_pos.xy).a * input.param.x;
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half4 c = input.faceColor * saturate(d - input.param.w);
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c *= decal_clip.x * decal_clip.y * decal_clip.z;
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#ifdef OUTLINE_ON
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c = lerp(input.outlineColor, input.faceColor, saturate(d - input.param.z));
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c *= saturate(d - input.param.y);
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#endif
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#if UNDERLAY_ON
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d = tex2D(_MainTex, input.texcoord1.xy).a * input.underlayParam.x;
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c += float4(_UnderlayColor.rgb * _UnderlayColor.a, _UnderlayColor.a) * saturate(d - input.underlayParam.y) * (1 - c.a);
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#endif
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#if UNDERLAY_INNER
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half sd = saturate(d - input.param.z);
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d = tex2D(_MainTex, input.texcoord1.xy).a * input.underlayParam.x;
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c += float4(_UnderlayColor.rgb * _UnderlayColor.a, _UnderlayColor.a) * (1 - saturate(d - input.underlayParam.y)) * sd * (1 - c.a);
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#endif
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// Alternative implementation to UnityGet2DClipping with support for softness.
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#if UNITY_UI_CLIP_RECT
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half2 m = saturate((_ClipRect.zw - _ClipRect.xy - abs(input.mask.xy)) * input.mask.zw);
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c *= m.x * m.y;
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#endif
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#if (UNDERLAY_ON | UNDERLAY_INNER)
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c *= input.texcoord1.z;
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#endif
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#if UNITY_UI_ALPHACLIP
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clip(c.a - 0.001);
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#endif
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return c;
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}
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ENDHLSL
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}
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}
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CustomEditor "TMPro.EditorUtilities.TMP_SDFShaderGUI"
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}
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