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struct vertex_t {
UNITY_VERTEX_INPUT_INSTANCE_ID
float4 position : POSITION;
float3 normal : NORMAL;
float4 color : COLOR;
float2 texcoord0 : TEXCOORD0;
float2 texcoord1 : TEXCOORD1;
};
struct pixel_t {
UNITY_VERTEX_INPUT_INSTANCE_ID
UNITY_VERTEX_OUTPUT_STEREO
float4 position : SV_POSITION;
float4 faceColor : COLOR;
float4 outlineColor : COLOR1;
float4 texcoord0 : TEXCOORD0;
float4 param : TEXCOORD1; // weight, scaleRatio
float2 mask : TEXCOORD2;
#if (UNDERLAY_ON || UNDERLAY_INNER)
float4 texcoord2 : TEXCOORD3;
float4 underlayColor : COLOR2;
#endif
};
float4 SRGBToLinear(float4 rgba) {
return float4(lerp(rgba.rgb / 12.92f, pow((rgba.rgb + 0.055f) / 1.055f, 2.4f), step(0.04045f, rgba.rgb)), rgba.a);
}
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);
float weight = lerp(_WeightNormal, _WeightBold, bold) / 4.0;
weight = (weight + _FaceDilate) * _ScaleRatioA * 0.5;
// Generate UV for the Masking Texture
float4 clampedRect = clamp(_ClipRect, -2e10, 2e10);
float2 maskUV = (vert.xy - clampedRect.xy) / (clampedRect.zw - clampedRect.xy);
float4 color = input.color;
#if (FORCE_LINEAR && !UNITY_COLORSPACE_GAMMA)
color = SRGBToLinear(input.color);
#endif
float opacity = color.a;
#if (UNDERLAY_ON | UNDERLAY_INNER)
opacity = 1.0;
#endif
float4 faceColor = float4(color.rgb, opacity) * _FaceColor;
faceColor.rgb *= faceColor.a;
float4 outlineColor = _OutlineColor;
outlineColor.a *= opacity;
outlineColor.rgb *= outlineColor.a;
output.position = vPosition;
output.faceColor = faceColor;
output.outlineColor = outlineColor;
output.texcoord0 = float4(input.texcoord0.xy, maskUV.xy);
output.param = float4(0.5 - weight, 1.3333 * _GradientScale * (_Sharpness + 1) / _TextureWidth, _OutlineWidth * _ScaleRatioA * 0.5, 0);
float2 mask = float2(0, 0);
#if UNITY_UI_CLIP_RECT
mask = vert.xy * 2 - clampedRect.xy - clampedRect.zw;
#endif
output.mask = mask;
#if (UNDERLAY_ON || UNDERLAY_INNER)
float4 underlayColor = _UnderlayColor;
underlayColor.rgb *= underlayColor.a;
float x = -(_UnderlayOffsetX * _ScaleRatioC) * _GradientScale / _TextureWidth;
float y = -(_UnderlayOffsetY * _ScaleRatioC) * _GradientScale / _TextureHeight;
output.texcoord2 = float4(input.texcoord0 + float2(x, y), input.color.a, 0);
output.underlayColor = underlayColor;
#endif
return output;
}
float4 PixShader(pixel_t input) : SV_Target
{
UNITY_SETUP_INSTANCE_ID(input);
float d = tex2D(_MainTex, input.texcoord0.xy).a;
float2 UV = input.texcoord0.xy;
float scale = rsqrt(abs(ddx(UV.x) * ddy(UV.y) - ddy(UV.x) * ddx(UV.y))) * input.param.y;
#if (UNDERLAY_ON | UNDERLAY_INNER)
float layerScale = scale;
layerScale /= 1 + ((_UnderlaySoftness * _ScaleRatioC) * layerScale);
float layerBias = input.param.x * layerScale - .5 - ((_UnderlayDilate * _ScaleRatioC) * .5 * layerScale);
#endif
scale /= 1 + (_OutlineSoftness * _ScaleRatioA * scale);
float4 faceColor = input.faceColor * saturate((d - input.param.x) * scale + 0.5);
#ifdef OUTLINE_ON
float4 outlineColor = lerp(input.faceColor, input.outlineColor, sqrt(min(1.0, input.param.z * scale * 2)));
faceColor = lerp(outlineColor, input.faceColor, saturate((d - input.param.x - input.param.z) * scale + 0.5));
faceColor *= saturate((d - input.param.x + input.param.z) * scale + 0.5);
#endif
#if UNDERLAY_ON
d = tex2D(_MainTex, input.texcoord2.xy).a * layerScale;
faceColor += float4(_UnderlayColor.rgb * _UnderlayColor.a, _UnderlayColor.a) * saturate(d - layerBias) * (1 - faceColor.a);
#endif
#if UNDERLAY_INNER
float bias = input.param.x * scale - 0.5;
float sd = saturate(d * scale - bias - input.param.z);
d = tex2D(_MainTex, input.texcoord2.xy).a * layerScale;
faceColor += float4(_UnderlayColor.rgb * _UnderlayColor.a, _UnderlayColor.a) * (1 - saturate(d - layerBias)) * sd * (1 - faceColor.a);
#endif
#ifdef MASKING
float a = abs(_MaskInverse - tex2D(_MaskTex, input.texcoord0.zw).a);
float t = a + (1 - _MaskWipeControl) * _MaskEdgeSoftness - _MaskWipeControl;
a = saturate(t / _MaskEdgeSoftness);
faceColor.rgb = lerp(_MaskEdgeColor.rgb * faceColor.a, faceColor.rgb, a);
faceColor *= a;
#endif
// Alternative implementation to UnityGet2DClipping with support for softness
#if UNITY_UI_CLIP_RECT
float2 maskZW = 0.25 / (0.25 * half2(_MaskSoftnessX, _MaskSoftnessY) + (1 / scale));
float2 m = saturate((_ClipRect.zw - _ClipRect.xy - abs(input.mask.xy)) * maskZW);
faceColor *= m.x * m.y;
#endif
#if (UNDERLAY_ON | UNDERLAY_INNER)
faceColor *= input.texcoord2.z;
#endif
#if UNITY_UI_ALPHACLIP
clip(faceColor.a - 0.001);
#endif
return faceColor;
}
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