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94 changes: 19 additions & 75 deletions
94
Assets/Pix2Pix/PostProcessing/Resources/TemporalReprojection.hlsl
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,104 +1,48 @@ | ||
| #include "PostProcessing/Shaders/StdLib.hlsl" | ||
| #include "PostProcessing/Shaders/Colors.hlsl" | ||
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| #define SAMPLE_TEX2D(name, uv) SAMPLE_TEXTURE2D(name, sampler##name, uv) | ||
| #define SAMPLE_DEPTH(name, uv) SAMPLE_DEPTH_TEXTURE(name, sampler##name, uv).x | ||
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| TEXTURE2D_SAMPLER2D(_MainTex, sampler_MainTex); | ||
| TEXTURE2D_SAMPLER2D(_RemapTex, sampler_RemapTex); | ||
| TEXTURE2D_SAMPLER2D(_CameraDepthTexture, sampler_CameraDepthTexture); | ||
| TEXTURE2D_SAMPLER2D(_CameraMotionVectorsTexture, sampler_CameraMotionVectorsTexture); | ||
| TEXTURE2D_SAMPLER2D(_UVRemap, sampler_UVRemap); | ||
| TEXTURE2D_SAMPLER2D(_PrevUVRemap, sampler_PrevUVRemap); | ||
| TEXTURE2D_SAMPLER2D(_PrevMoDepth, sampler_PrevMoDepth); | ||
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| float4 _CameraDepthTexture_TexelSize; | ||
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| float _DepthWeight; | ||
| float _MotionWeight; | ||
| float2 _DeltaTime; | ||
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| struct FragmentOutput | ||
| { | ||
| half4 uvRemap : SV_Target0; | ||
| half4 moDepth : SV_Target1; | ||
| half4 color : SV_Target0; | ||
| half2 remap : SV_Target1; | ||
| }; | ||
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| // Converts a raw depth value to a linear 0-1 depth value. | ||
| float LinearizeDepth(float z) | ||
| { | ||
| // A little bit complicated to take the current projection mode | ||
| // (perspective/orthographic) into account. | ||
| float isOrtho = unity_OrthoParams.w; | ||
| float isPers = 1.0 - unity_OrthoParams.w; | ||
| z *= _ZBufferParams.x; | ||
| return (1.0 - isOrtho * z) / (isPers * z + _ZBufferParams.y); | ||
| } | ||
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| float3 CompareDepth(float3 min_uvd, float2 uv) | ||
| bool DepthMask(float depth) | ||
| { | ||
| float d = SAMPLE_DEPTH(_CameraDepthTexture, uv); | ||
| return d < min_uvd ? float3(uv, d) : min_uvd; | ||
| } | ||
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| float2 SearchClosest(float2 uv) | ||
| { | ||
| float4 duv = _CameraDepthTexture_TexelSize.xyxy * float4(1, 1, -1, 0); | ||
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| float3 min_uvd = float3(uv, SAMPLE_DEPTH(_CameraDepthTexture, uv)); | ||
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| min_uvd = CompareDepth(min_uvd, uv - duv.xy); | ||
| min_uvd = CompareDepth(min_uvd, uv - duv.wy); | ||
| min_uvd = CompareDepth(min_uvd, uv - duv.zy); | ||
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| min_uvd = CompareDepth(min_uvd, uv + duv.zw); | ||
| min_uvd = CompareDepth(min_uvd, uv + duv.xw); | ||
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| min_uvd = CompareDepth(min_uvd, uv + duv.zy); | ||
| min_uvd = CompareDepth(min_uvd, uv + duv.wy); | ||
| min_uvd = CompareDepth(min_uvd, uv + duv.xy); | ||
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| return min_uvd.xy; | ||
| const float epsilon = 1e-5; | ||
| #if defined(UNITY_REVERSED_Z) | ||
| return depth > epsilon; | ||
| #else | ||
| return depth < 1 - epsilon; | ||
| #endif | ||
| } | ||
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| FragmentOutput FragInitialize(VaryingsDefault i) | ||
| { | ||
| half2 m = SAMPLE_TEX2D(_CameraMotionVectorsTexture, i.texcoord).xy; | ||
| half d = LinearizeDepth(SAMPLE_DEPTH(_CameraDepthTexture, i.texcoord)); | ||
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| FragmentOutput o; | ||
| o.uvRemap = half4(i.texcoord, d < 0.9, 1); | ||
| o.moDepth = half4(m, d, 0); | ||
| o.color = SAMPLE_TEX2D(_MainTex, i.texcoord); | ||
| o.remap = i.texcoord; | ||
| return o; | ||
| } | ||
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| FragmentOutput FragUpdate(VaryingsDefault i) | ||
| { | ||
| float2 uv1 = i.texcoord; | ||
| half2 m1 = SAMPLE_TEX2D(_CameraMotionVectorsTexture, uv1).xy; | ||
| half d1 = LinearizeDepth(SAMPLE_DEPTH(_CameraDepthTexture, uv1)); | ||
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| float2 uv0 = uv1 - m1; | ||
| half3 md0 = SAMPLE_TEX2D(_PrevMoDepth, uv0).xyz; | ||
| half4 c0 = SAMPLE_TEX2D(_PrevUVRemap, uv0); | ||
| half2 mv = SAMPLE_TEX2D(_CameraMotionVectorsTexture, i.texcoord).xy; | ||
| half2 remap = SAMPLE_TEX2D(_RemapTex, i.texcoord - mv).xy; | ||
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| // Disocclusion test | ||
| float docc = abs(1 - d1 / md0.z) * 20;//_DepthWeight; | ||
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| // Out of screen test | ||
| float oscr = any(uv0 < 0) + any(uv0 > 1); | ||
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| float alpha = 1 - saturate(docc + oscr); | ||
| half4 c1 = SAMPLE_TEX2D(_MainTex, i.texcoord); | ||
| half4 c2 = SAMPLE_TEX2D(_MainTex, remap); | ||
| bool mask = DepthMask(SAMPLE_DEPTH(_CameraDepthTexture, i.texcoord)); | ||
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| FragmentOutput o; | ||
| o.uvRemap = half4(c0.xy, d1 < 0.9, min(c0.a, alpha)); | ||
| o.moDepth = half4(m1, d1, 0); | ||
| o.color = lerp(c1, c2, mask); | ||
| o.remap = remap; | ||
| return o; | ||
| } | ||
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| half4 FragComposite(VaryingsDefault i) : SV_Target | ||
| { | ||
| half4 remap = SAMPLE_TEX2D(_UVRemap, i.texcoord); | ||
| half4 c = SAMPLE_TEX2D(_MainTex, remap.xy); | ||
| c = lerp(SAMPLE_TEX2D(_MainTex,i.texcoord), c, remap.z); | ||
| return c; | ||
| } |