233 lines
8.4 KiB
HLSL
233 lines
8.4 KiB
HLSL
#ifndef VOLUMETRIC_LIGHTS_BLUR
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#define VOLUMETRIC_LIGHTS_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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TEXTURE2D(_BlueNoise);
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float4 _BlueNoise_TexelSize;
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float4 _MainTex_TexelSize;
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float4 _MainTex_ST;
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float4 _DownsampledDepth_TexelSize;
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float3 _MiscData;
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float _BlurScale;
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#define DITHER_STRENGTH _MiscData.x
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#define BRIGHTNESS _MiscData.y
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#define EDGE_THRESHOLD _MiscData.z
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#define BLUR_SCALE _BlurScale
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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 * BLUR_SCALE, 0); float2 uv1 = i.uv - inc; float2 uv2 = i.uv + inc; float2 inc2 = float2(_MainTex_TexelSize.x * 3.2307692308 * BLUR_SCALE, 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 * BLUR_SCALE); float2 uv1 = i.uv - inc; float2 uv2 = i.uv + inc; float2 inc2 = float2(0, _MainTex_TexelSize.y * 3.2307692308 * BLUR_SCALE); 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 * BLUR_SCALE, 0); o.uv1 = o.uv - inc; o.uv2 = o.uv + inc; float2 inc2 = float2(_MainTex_TexelSize.x * 3.2307692308 * BLUR_SCALE, 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 * BLUR_SCALE); o.uv1 = o.uv - inc; o.uv2 = o.uv + inc; float2 inc2 = float2(0, _MainTex_TexelSize.y * 3.2307692308 * BLUR_SCALE); 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 AttributesSimple
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{
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float4 positionOS : 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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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(AttributesSimple 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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inline void ApplyDither(inout float4 pixel, float2 uv) {
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// screen space dithering
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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( uv * _MainTex_TexelSize.zw, magic.xy ) ) );
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//pixel = max(0, pixel - jitter * DITHER_STRENGTH);
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// blue noise based dithering
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float2 noiseUV = uv * _MainTex_TexelSize.zw * _BlueNoise_TexelSize.xy;
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jitter = SAMPLE_TEXTURE2D(_BlueNoise, sampler_PointRepeat, noiseUV).r;
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pixel = max(0, pixel - jitter * DITHER_STRENGTH);
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}
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#if EDGE_PRESERVE_UPSCALING
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inline float GetDownsampledLinearEyeDepth(float2 uv) {
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float rawDepth = SAMPLE_TEXTURE2D_X(_DownsampledDepth, sampler_LinearClamp, uv).r;
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float sceneLinearDepth = LinearEyeDepth(rawDepth, _ZBufferParams);
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#if defined(ORTHO_SUPPORT)
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#if UNITY_REVERSED_Z
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rawDepth = 1.0 - rawDepth;
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#endif
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float orthoDepth = lerp(_ProjectionParams.y, _ProjectionParams.z, rawDepth);
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sceneLinearDepth = lerp(sceneLinearDepth, orthoDepth, unity_OrthoParams.w);
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#endif
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return sceneLinearDepth;
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}
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#else
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#define GetDownsampledLinearEyeDepth(uv) GetLinearEyeDepth(uv)
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#endif
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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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float4 pixel0 = SAMPLE_TEXTURE2D_X(_MainTex, sampler_LinearClamp, i.uv);
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float4 pixel1 = SAMPLE_TEXTURE2D_X(_MainTex, sampler_LinearClamp, uv1);
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float4 pixel2 = SAMPLE_TEXTURE2D_X(_MainTex, sampler_LinearClamp, uv2);
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float4 pixel3 = SAMPLE_TEXTURE2D_X(_MainTex, sampler_LinearClamp, uv3);
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float4 pixel4 = SAMPLE_TEXTURE2D_X(_MainTex, sampler_LinearClamp, uv4);
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float w0 = 0.2270270270;
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float4 wn = float4(0.3162162162.xx, 0.0702702703.xx);
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#if EDGE_PRESERVE_UPSCALING || EDGE_PRESERVE
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float depthFull = GetDownsampledLinearEyeDepth(i.uv);
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float4 depths;
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depths.x = GetDownsampledLinearEyeDepth(uv1);
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depths.y = GetDownsampledLinearEyeDepth(uv2);
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depths.z = GetDownsampledLinearEyeDepth(uv3);
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depths.w = GetDownsampledLinearEyeDepth(uv4);
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float4 depthDiffs = 1.0 + abs(depths - depthFull) * EDGE_THRESHOLD;
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wn *= saturate(1.0 / depthDiffs);
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float w = w0 + dot(wn, 1.0);
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float4 pixel = pixel0 * w0 + pixel1 * wn.x + pixel2 * wn.y + pixel3 * wn.z + pixel4 * wn.w;
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pixel /= w;
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#else
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float4 pixel = pixel0 * w0 + pixel1 * wn.x + pixel2 * wn.y + pixel3 * wn.z + pixel4 * wn.w;
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#endif
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#if defined(FINAL_BLEND)
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pixel.rgb *= BRIGHTNESS;
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#endif
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#if DITHER
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ApplyDither(pixel, i.uv);
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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(AttributesSimple 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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pixel.rgb *= BRIGHTNESS;
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#if DITHER
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ApplyDither(pixel, i.uv);
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#endif
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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_LIGHTS_BLUR |