struct vertex_t {
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UNITY_VERTEX_INPUT_INSTANCE_ID
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float4 position : 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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};
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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 position : SV_POSITION;
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float4 faceColor : COLOR;
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float4 outlineColor : COLOR1;
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float4 texcoord0 : TEXCOORD0;
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float4 param : TEXCOORD1; // weight, scaleRatio
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float2 mask : TEXCOORD2;
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#if (UNDERLAY_ON || UNDERLAY_INNER)
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float4 texcoord2 : TEXCOORD3;
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float4 underlayColor : COLOR2;
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#endif
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};
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float4 SRGBToLinear(float4 rgba) {
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return float4(lerp(rgba.rgb / 12.92f, pow((rgba.rgb + 0.055f) / 1.055f, 2.4f), step(0.04045f, rgba.rgb)), rgba.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;
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UNITY_INITIALIZE_OUTPUT(pixel_t, output);
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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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float4 vert = input.position;
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vert.x += _VertexOffsetX;
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vert.y += _VertexOffsetY;
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float4 vPosition = UnityObjectToClipPos(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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// 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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float4 color = input.color;
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#if (FORCE_LINEAR && !UNITY_COLORSPACE_GAMMA)
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color = SRGBToLinear(input.color);
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#endif
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float opacity = 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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float4 faceColor = float4(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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output.position = vPosition;
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output.faceColor = faceColor;
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output.outlineColor = outlineColor;
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output.texcoord0 = float4(input.texcoord0.xy, maskUV.xy);
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output.param = float4(0.5 - weight, 1.3333 * _GradientScale * (_Sharpness + 1) / _TextureWidth, _OutlineWidth * _ScaleRatioA * 0.5, 0);
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float2 mask = float2(0, 0);
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#if UNITY_UI_CLIP_RECT
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mask = vert.xy * 2 - clampedRect.xy - clampedRect.zw;
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#endif
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output.mask = mask;
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#if (UNDERLAY_ON || UNDERLAY_INNER)
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float4 underlayColor = _UnderlayColor;
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underlayColor.rgb *= underlayColor.a;
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float x = -(_UnderlayOffsetX * _ScaleRatioC) * _GradientScale / _TextureWidth;
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float y = -(_UnderlayOffsetY * _ScaleRatioC) * _GradientScale / _TextureHeight;
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output.texcoord2 = float4(input.texcoord0 + float2(x, y), input.color.a, 0);
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output.underlayColor = underlayColor;
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#endif
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return output;
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}
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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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float d = tex2D(_MainTex, input.texcoord0.xy).a;
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float2 UV = input.texcoord0.xy;
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float scale = rsqrt(abs(ddx(UV.x) * ddy(UV.y) - ddy(UV.x) * ddx(UV.y))) * input.param.y;
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#if (UNDERLAY_ON | UNDERLAY_INNER)
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float layerScale = scale;
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layerScale /= 1 + ((_UnderlaySoftness * _ScaleRatioC) * layerScale);
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float layerBias = input.param.x * layerScale - .5 - ((_UnderlayDilate * _ScaleRatioC) * .5 * layerScale);
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#endif
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scale /= 1 + (_OutlineSoftness * _ScaleRatioA * scale);
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float4 faceColor = input.faceColor * saturate((d - input.param.x) * scale + 0.5);
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#ifdef OUTLINE_ON
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float4 outlineColor = lerp(input.faceColor, input.outlineColor, sqrt(min(1.0, input.param.z * scale * 2)));
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faceColor = lerp(outlineColor, input.faceColor, saturate((d - input.param.x - input.param.z) * scale + 0.5));
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faceColor *= saturate((d - input.param.x + input.param.z) * scale + 0.5);
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#endif
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#if UNDERLAY_ON
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d = tex2D(_MainTex, input.texcoord2.xy).a * layerScale;
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faceColor += float4(_UnderlayColor.rgb * _UnderlayColor.a, _UnderlayColor.a) * saturate(d - layerBias) * (1 - faceColor.a);
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#endif
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#if UNDERLAY_INNER
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float bias = input.param.x * scale - 0.5;
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float sd = saturate(d * scale - bias - input.param.z);
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d = tex2D(_MainTex, input.texcoord2.xy).a * layerScale;
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faceColor += float4(_UnderlayColor.rgb * _UnderlayColor.a, _UnderlayColor.a) * (1 - saturate(d - layerBias)) * sd * (1 - faceColor.a);
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#endif
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#ifdef MASKING
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float a = abs(_MaskInverse - tex2D(_MaskTex, input.texcoord0.zw).a);
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float t = a + (1 - _MaskWipeControl) * _MaskEdgeSoftness - _MaskWipeControl;
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a = saturate(t / _MaskEdgeSoftness);
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faceColor.rgb = lerp(_MaskEdgeColor.rgb * faceColor.a, faceColor.rgb, a);
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faceColor *= 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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float2 maskZW = 0.25 / (0.25 * half2(_MaskSoftnessX, _MaskSoftnessY) + (1 / scale));
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float2 m = saturate((_ClipRect.zw - _ClipRect.xy - abs(input.mask.xy)) * maskZW);
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faceColor *= m.x * m.y;
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#endif
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#if (UNDERLAY_ON | UNDERLAY_INNER)
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faceColor *= input.texcoord2.z;
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#endif
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#if UNITY_UI_ALPHACLIP
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clip(faceColor.a - 0.001);
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#endif
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return faceColor;
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}
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