104 lines
4.0 KiB
HLSL
104 lines
4.0 KiB
HLSL
#ifndef SSR_BLUR
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#define SSR_BLUR
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// Copyright 2021 Kronnect - All Rights Reserved.
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TEXTURE2D_X(_MainTex);
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float4 _MainTex_TexelSize;
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float4 _SSRSettings2;
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#define BLUR_MULTIPLIER _SSRSettings2.y
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float4 _SSRSettings4;
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#define DENOISE_POWER _SSRSettings4.w
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float2 _SSRBlurStrength;
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#define BLUR_STRENGTH_HORIZ _SSRBlurStrength.x
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#define BLUR_STRENGTH_VERT _SSRBlurStrength.y
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#if defined(UNITY_SINGLE_PASS_STEREO)
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#define SSR_VERTEX_CROSS_DATA
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#define SSR_VERTEX_OUTPUT_GAUSSIAN_UV(o)
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#if defined(SSR_BLUR_HORIZ)
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#define SSR_FRAG_SETUP_GAUSSIAN_UV(i) float2 offset1 = float2(_MainTex_TexelSize.x * 1.3846153846 * BLUR_STRENGTH_HORIZ, 0); float2 offset2 = float2(_MainTex_TexelSize.x * 3.2307692308 * BLUR_STRENGTH_HORIZ, 0);
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#else
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#define SSR_FRAG_SETUP_GAUSSIAN_UV(i) float2 offset1 = float2(0, _MainTex_TexelSize.y * 1.3846153846 * BLUR_STRENGTH_VERT); float2 offset2 = float2(0, _MainTex_TexelSize.y * 3.2307692308 * BLUR_STRENGTH_VERT);
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#endif
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#else
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#define SSR_VERTEX_CROSS_DATA float2 offset1 : TEXCOORD1; float2 offset2 : TEXCOORD2;
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#if defined(SSR_BLUR_HORIZ)
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#define SSR_VERTEX_OUTPUT_GAUSSIAN_UV(o) o.offset1 = float2(_MainTex_TexelSize.x * 1.3846153846 * BLUR_STRENGTH_HORIZ, 0); o.offset2 = float2(_MainTex_TexelSize.x * 3.2307692308 * BLUR_STRENGTH_HORIZ, 0);
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#else
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#define SSR_VERTEX_OUTPUT_GAUSSIAN_UV(o) o.offset1 = float2(0, _MainTex_TexelSize.y * 1.3846153846 * BLUR_STRENGTH_VERT); o.offset2 = float2(0, _MainTex_TexelSize.y * 3.2307692308 * BLUR_STRENGTH_VERT);
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#endif
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#define SSR_FRAG_SETUP_GAUSSIAN_UV(i) float2 offset1 = i.offset1; float2 offset2 = i.offset2;
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#endif
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struct AttributesFS {
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float4 positionHCS : POSITION;
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float2 uv : TEXCOORD0;
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UNITY_VERTEX_INPUT_INSTANCE_ID
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};
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struct VaryingsCross {
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float4 positionCS : SV_POSITION;
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float2 uv : TEXCOORD0;
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SSR_VERTEX_CROSS_DATA
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UNITY_VERTEX_INPUT_INSTANCE_ID
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UNITY_VERTEX_OUTPUT_STEREO
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};
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VaryingsCross VertBlur(AttributesFS input) {
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VaryingsCross 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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output.positionCS = float4(input.positionHCS.xyz, 1.0);
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#if UNITY_UV_STARTS_AT_TOP
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output.positionCS.y *= -1;
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#endif
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output.uv = input.uv;
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SSR_VERTEX_OUTPUT_GAUSSIAN_UV(output)
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return output;
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}
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half4 FragBlur (VaryingsCross input): SV_Target {
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UNITY_SETUP_INSTANCE_ID(input);
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UNITY_SETUP_STEREO_EYE_INDEX_POST_VERTEX(input);
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input.uv = SSRStereoTransformScreenSpaceTex(input.uv);
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SSR_FRAG_SETUP_GAUSSIAN_UV(input)
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float2 uv = input.uv;
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half4 c0 = SAMPLE_TEXTURE2D_X(_MainTex, sampler_LinearClamp, uv);
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half4 c1 = SAMPLE_TEXTURE2D_X(_MainTex, sampler_LinearClamp, uv + offset1);
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half4 c2 = SAMPLE_TEXTURE2D_X(_MainTex, sampler_LinearClamp, uv - offset1);
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half4 c3 = SAMPLE_TEXTURE2D_X(_MainTex, sampler_LinearClamp, uv + offset2);
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half4 c4 = SAMPLE_TEXTURE2D_X(_MainTex, sampler_LinearClamp, uv - offset2);
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#if SSR_DENOISE
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half l0 = max(0, getLuma(c0.rgb));
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half l1 = max(0, getLuma(c1.rgb));
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half l2 = max(0, getLuma(c2.rgb));
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half l3 = max(0, getLuma(c3.rgb));
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half l4 = max(0, getLuma(c4.rgb));
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half ml = (l0+l1+l2+l3+l4) * 0.2;
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c0.rgb *= pow( (1.0 + min(ml, l0)) / (1.0 + l0) , DENOISE_POWER);
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c1.rgb *= pow( (1.0 + min(ml, l1)) / (1.0 + l1) , DENOISE_POWER);
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c2.rgb *= pow( (1.0 + min(ml, l2)) / (1.0 + l2) , DENOISE_POWER);
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c3.rgb *= pow( (1.0 + min(ml, l3)) / (1.0 + l3) , DENOISE_POWER);
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c4.rgb *= pow( (1.0 + min(ml, l4)) / (1.0 + l4) , DENOISE_POWER);
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#endif
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half4 blurred = c0 * 0.2270270270 + (c1 + c2) * 0.3162162162 + (c3 + c4) * 0.0702702703;
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return max(0, blurred);
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}
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#endif // SSR_BLUR |