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Shader optimizations #62

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29 changes: 12 additions & 17 deletions UiRoundedCorners/IndependentRoundedCorners.shader
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Original file line number Diff line number Diff line change
Expand Up @@ -59,39 +59,34 @@
float4 _r;
float4 _halfSize;
float4 _rect2props;
float4 _OuterUV;
half4 _OuterUV;
sampler2D _MainTex;
float4 _ClipRect;
fixed4 _TextureSampleAdd;

fixed4 frag (v2f i) : SV_Target {
float2 uvSample = i.uv;
uvSample.x = (uvSample.x - _OuterUV.x) / (_OuterUV.z - _OuterUV.x);
uvSample.y = (uvSample.y - _OuterUV.y) / (_OuterUV.w - _OuterUV.y);

half4 color = (tex2D(_MainTex, i.uv) + _TextureSampleAdd) * i.color;
half4 textureColor = tex2D(_MainTex, i.uv);
half4 color = (textureColor + _TextureSampleAdd) * i.color;

// Apply standard UI clipping first
#ifdef UNITY_UI_CLIP_RECT
color.a *= UnityGet2DClipping(i.worldPosition.xy, _ClipRect);
#endif

#ifdef UNITY_UI_ALPHACLIP
clip(color.a - 0.001);
#endif
half2 uvSample = (i.uv - _OuterUV.xy) / (_OuterUV.zw - _OuterUV.xy);

if (color.a <= 0) {
return color;
}
// Calculate the rounded corner alpha using an SDF for independent corners
half sdfAlpha = CalcAlphaForIndependentCorners(uvSample, _halfSize.xy, _rect2props, _r);

float alpha = CalcAlphaForIndependentCorners(uvSample, _halfSize.xy, _rect2props, _r);
// Combine the procedural alpha with the texture's alpha
color.a *= sdfAlpha;

#ifdef UNITY_UI_ALPHACLIP
clip(alpha - 0.001);
clip(color.a - 0.001);
#endif

return mixAlpha(tex2D(_MainTex, i.uv), i.color, alpha);
}

return color;
}
ENDCG
}
}
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29 changes: 13 additions & 16 deletions UiRoundedCorners/RoundedCorners.shader
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Expand Up @@ -55,39 +55,36 @@ Shader "UI/RoundedCorners/RoundedCorners" {
#pragma multi_compile_local _ UNITY_UI_ALPHACLIP

float4 _WidthHeightRadius;
float4 _OuterUV;
half4 _OuterUV;
sampler2D _MainTex;
fixed4 _TextureSampleAdd;
float4 _ClipRect;

fixed4 frag (v2f i) : SV_Target {
float2 uvSample = i.uv;
uvSample.x = (uvSample.x - _OuterUV.x) / (_OuterUV.z - _OuterUV.x);
uvSample.y = (uvSample.y - _OuterUV.y) / (_OuterUV.w - _OuterUV.y);

half4 color = (tex2D(_MainTex, i.uv) + _TextureSampleAdd) * i.color;
half4 textureColor = tex2D(_MainTex, i.uv);
half4 color = (textureColor + _TextureSampleAdd) * i.color;

// Apply standard UI clipping first
#ifdef UNITY_UI_CLIP_RECT
color.a *= UnityGet2DClipping(i.worldPosition.xy, _ClipRect);
#endif

#ifdef UNITY_UI_ALPHACLIP
clip(color.a - 0.001);
#endif
// Remap UVs for the SDF calculation
half2 uvSample = i.uv;
uvSample = (uvSample - _OuterUV.xy) / (_OuterUV.zw - _OuterUV.xy);

if (color.a <= 0) {
return color;
}
// Calculate the rounded corner alpha using a Signed Distance Field
half sdfAlpha = CalcAlpha(uvSample, _WidthHeightRadius.xy, _WidthHeightRadius.z);

float alpha = CalcAlpha(uvSample, _WidthHeightRadius.xy, _WidthHeightRadius.z);
// Combine the procedural alpha with the texture's alpha
color.a *= sdfAlpha;

#ifdef UNITY_UI_ALPHACLIP
clip(alpha - 0.001);
clip(color.a - 0.001);
#endif

return mixAlpha(tex2D(_MainTex, i.uv), i.color, alpha);
return color;
}

ENDCG
}
}
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