185 lines
7.4 KiB
HLSL
185 lines
7.4 KiB
HLSL
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#ifndef VOLUMETRIC_FOG_2_BLUR
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#define VOLUMETRIC_FOG_2_BLUR
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#include "CommonsURP.hlsl"
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TEXTURE2D_X(_MainTex);
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TEXTURE2D_X(_LightBuffer);
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TEXTURE2D_X(_DownsampledDepth);
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float4 _MainTex_TexelSize;
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float4 _MainTex_ST;
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float _BlurScale;
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float4 _DownsampledDepth_TexelSize;
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float _EdgeThreshold;
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// Optimization for SSPR
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#define uvN uv1
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#define uvE uv2
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#define uvW uv3
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#define uvS uv4
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#if defined(UNITY_STEREO_INSTANCING_ENABLED) || defined(UNITY_STEREO_MULTIVIEW_ENABLED) || defined(SINGLE_PASS_STEREO)
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#define VERTEX_CROSS_UV_DATA
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#define VERTEX_OUTPUT_GAUSSIAN_UV(o)
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#if defined(BLUR_HORIZ)
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#define FRAG_SETUP_GAUSSIAN_UV(i) float2 inc = float2(_MainTex_TexelSize.x * 1.3846153846 * _BlurScale, 0); float2 uv1 = i.uv - inc; float2 uv2 = i.uv + inc; float2 inc2 = float2(_MainTex_TexelSize.x * 3.2307692308 * _BlurScale, 0); float2 uv3 = i.uv - inc2; float2 uv4 = i.uv + inc2;
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#else
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#define FRAG_SETUP_GAUSSIAN_UV(i) float2 inc = float2(0, _MainTex_TexelSize.y * 1.3846153846 * _BlurScale); float2 uv1 = i.uv - inc; float2 uv2 = i.uv + inc; float2 inc2 = float2(0, _MainTex_TexelSize.y * 3.2307692308 * _BlurScale); float2 uv3 = i.uv - inc2; float2 uv4 = i.uv + inc2;
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#endif
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#else
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#define VERTEX_CROSS_UV_DATA float2 uvN : TEXCOORD1; float2 uvW: TEXCOORD2; float2 uvE: TEXCOORD3; float2 uvS: TEXCOORD4;
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#if defined(BLUR_HORIZ)
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#define VERTEX_OUTPUT_GAUSSIAN_UV(o) float2 inc = float2(_MainTex_TexelSize.x * 1.3846153846 * _BlurScale, 0); o.uv1 = o.uv - inc; o.uv2 = o.uv + inc; float2 inc2 = float2(_MainTex_TexelSize.x * 3.2307692308 * _BlurScale, 0); o.uv3 = o.uv - inc2; o.uv4 = o.uv + inc2;
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#else
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#define VERTEX_OUTPUT_GAUSSIAN_UV(o) float2 inc = float2(0, _MainTex_TexelSize.y * 1.3846153846 * _BlurScale); o.uv1 = o.uv - inc; o.uv2 = o.uv + inc; float2 inc2 = float2(0, _MainTex_TexelSize.y * 3.2307692308 * _BlurScale); o.uv3 = o.uv - inc2; o.uv4 = o.uv + inc2;
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#endif
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#define FRAG_SETUP_GAUSSIAN_UV(i) float2 uv1 = i.uv1; float2 uv2 = i.uv2; float2 uv3 = i.uv3; float2 uv4 = i.uv4;
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#endif
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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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UNITY_VERTEX_INPUT_INSTANCE_ID
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VERTEX_CROSS_UV_DATA
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UNITY_VERTEX_OUTPUT_STEREO
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};
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VaryingsCross VertBlur(Attributes v) {
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VaryingsCross o;
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UNITY_SETUP_INSTANCE_ID(v);
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UNITY_TRANSFER_INSTANCE_ID(v, o);
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UNITY_INITIALIZE_VERTEX_OUTPUT_STEREO(o);
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o.positionCS = v.positionOS;
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o.positionCS.y *= _ProjectionParams.x;
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o.uv = v.uv;
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VERTEX_OUTPUT_GAUSSIAN_UV(o)
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return o;
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}
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inline float getLuma(float4 rgb) {
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const float3 lum = float3(0.299, 0.587, 0.114);
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return dot(rgb.xyz, lum);
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}
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float4 FragBlur (VaryingsCross i): SV_Target {
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UNITY_SETUP_INSTANCE_ID(i);
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UNITY_SETUP_STEREO_EYE_INDEX_POST_VERTEX(i);
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i.uv = UnityStereoTransformScreenSpaceTex(i.uv);
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FRAG_SETUP_GAUSSIAN_UV(i)
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#if defined(FINAL_BLEND) && EDGE_PRESERVE
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// edge aware blur
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float4 mask = SAMPLE_TEXTURE2D_X(_LightBuffer, sampler_PointClamp, i.uv);
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float4 mask1 = SAMPLE_TEXTURE2D_X(_LightBuffer, sampler_PointClamp, uv1);
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float4 mask2 = SAMPLE_TEXTURE2D_X(_LightBuffer, sampler_PointClamp, uv2);
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float4 mask3 = SAMPLE_TEXTURE2D_X(_LightBuffer, sampler_PointClamp, uv3);
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float4 mask4 = SAMPLE_TEXTURE2D_X(_LightBuffer, sampler_PointClamp, uv4);
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float luma = getLuma(mask);
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float luma1 = getLuma(mask1);
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float luma2 = getLuma(mask2);
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float luma3 = getLuma(mask3);
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float luma4 = getLuma(mask4);
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float4 diffs = saturate(float4(luma, luma1, luma3, luma4) / _EdgeThreshold);
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float atten = max(max(diffs.x, diffs.y), max(diffs.z, diffs.w));
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if (atten <= 0) return 0;
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#endif
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float4 pixel0 = SAMPLE_TEXTURE2D_X(_MainTex, sampler_LinearClamp, i.uv) * 0.2270270270;
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float4 pixel1 = SAMPLE_TEXTURE2D_X(_MainTex, sampler_LinearClamp, uv1) * 0.3162162162;
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float4 pixel2 = SAMPLE_TEXTURE2D_X(_MainTex, sampler_LinearClamp, uv2) * 0.3162162162;
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float4 pixel3 = SAMPLE_TEXTURE2D_X(_MainTex, sampler_LinearClamp, uv3) * 0.0702702703;
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float4 pixel4 = SAMPLE_TEXTURE2D_X(_MainTex, sampler_LinearClamp, uv4) * 0.0702702703;
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// remove black halo around edges
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if (getLuma(pixel1) <= 0) pixel1 = pixel2;
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if (getLuma(pixel2) <= 0) pixel2 = pixel1;
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if (getLuma(pixel3) <= 0) pixel3 = pixel4;
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if (getLuma(pixel4) <= 0) pixel4 = pixel3;
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float4 pixel = pixel0 + pixel1 + pixel2 + pixel3 + pixel4;
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#if defined(DITHER)
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const float3 magic = float3( 0.06711056, 0.00583715, 52.9829189 );
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float jitter = frac( magic.z * frac( dot( i.uv.xy * _MainTex_TexelSize.zw, magic.xy ) ) );
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pixel = max(0, pixel - jitter * 0.01);
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#endif
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#if defined(FINAL_BLEND) && EDGE_PRESERVE
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pixel *= atten;
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#endif
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return pixel;
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}
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struct VaryingsSimple {
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float4 positionCS : SV_POSITION;
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float2 uv: TEXCOORD0;
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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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VaryingsSimple VertSimple(Attributes v) {
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VaryingsSimple o;
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UNITY_SETUP_INSTANCE_ID(v);
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UNITY_TRANSFER_INSTANCE_ID(v, o);
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UNITY_INITIALIZE_VERTEX_OUTPUT_STEREO(o);
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o.positionCS = v.positionOS;
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o.positionCS.y *= _ProjectionParams.x;
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o.uv = v.uv;
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return o;
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}
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float4 FragSeparatedBlend (VaryingsSimple i): SV_Target {
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UNITY_SETUP_INSTANCE_ID(i);
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UNITY_SETUP_STEREO_EYE_INDEX_POST_VERTEX(i);
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float depthFull = GetRawDepth(i.uv);
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const float threshold = 0.0005;
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const float t = 0.5;
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float2 uv00 = UnityStereoTransformScreenSpaceTex(i.uv + _DownsampledDepth_TexelSize.xy * float2(-t, -t));
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float2 uv10 = UnityStereoTransformScreenSpaceTex(i.uv + _DownsampledDepth_TexelSize.xy * float2(t, -t));
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float2 uv01 = UnityStereoTransformScreenSpaceTex(i.uv + _DownsampledDepth_TexelSize.xy * float2(-t, t));
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float2 uv11 = UnityStereoTransformScreenSpaceTex(i.uv + _DownsampledDepth_TexelSize.xy * float2(t, t));
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float4 depths;
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depths.x = SAMPLE_TEXTURE2D_X(_DownsampledDepth, sampler_LinearClamp, uv00).r;
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depths.y = SAMPLE_TEXTURE2D_X(_DownsampledDepth, sampler_LinearClamp, uv10).r;
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depths.z = SAMPLE_TEXTURE2D_X(_DownsampledDepth, sampler_LinearClamp, uv01).r;
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depths.w = SAMPLE_TEXTURE2D_X(_DownsampledDepth, sampler_LinearClamp, uv11).r;
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float4 diffs = abs(depthFull.xxxx - depths);
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float2 minUV = UnityStereoTransformScreenSpaceTex(i.uv);
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if (any(diffs > threshold)) {
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// Check 10 vs 00
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float minDiff = lerp(diffs.x, diffs.y, diffs.y < diffs.x);
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minUV = lerp(uv00, uv10, diffs.y < diffs.x);
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// Check against 01
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minUV = lerp(minUV, uv01, diffs.z < minDiff);
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minDiff = lerp(minDiff, diffs.z, diffs.z < minDiff);
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// Check against 11
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minUV = lerp(minUV, uv11, diffs.w < minDiff);
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}
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float4 pixel = SAMPLE_TEXTURE2D_X(_MainTex, sampler_LinearClamp, minUV);
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return pixel;
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}
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float4 FragOnlyDepth (VaryingsSimple i): SV_Target {
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UNITY_SETUP_INSTANCE_ID(i);
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UNITY_SETUP_STEREO_EYE_INDEX_POST_VERTEX(i);
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return GetRawDepth(i.uv);
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}
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#endif // VOLUMETRIC_FOG_2_BLUR
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