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Fix Disney SSS for Intel GPUs

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Evgenii Golubev 7 年前
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9b33356f
共有 5 个文件被更改，包括 121 次插入 和 55 次删除
  1. 71
      Assets/ScriptableRenderPipeline/HDRenderPipeline/HDRenderPipeline.cs
  2. 12
      Assets/ScriptableRenderPipeline/HDRenderPipeline/HDShaderIDs.cs
  3. 27
      Assets/ScriptableRenderPipeline/HDRenderPipeline/Material/Lit/Resources/SubsurfaceScattering.compute
  4. 56
      Assets/ScriptableRenderPipeline/HDRenderPipeline/Material/Lit/Resources/CombineLighting.shader
  5. 10
      Assets/ScriptableRenderPipeline/HDRenderPipeline/Material/Lit/Resources/CombineLighting.shader.meta

71
Assets/ScriptableRenderPipeline/HDRenderPipeline/HDRenderPipeline.cs
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// Various set of material use in render loop
ComputeShader m_SubsurfaceScatteringCS { get { return m_Asset.renderPipelineResources.subsurfaceScatteringCS; } }
int m_SubsurfaceScatteringKernel;
Material m_CombineLightingPass;
// Old SSS Model >>>
Material m_SssVerticalFilterPass;
Material m_SssHorizontalFilterAndCombinePass;

// Various buffer
readonly int m_CameraColorBuffer;
readonly int m_CameraDiffuseIrradianceBuffer;
readonly int m_CameraSssDiffuseLightingBuffer;
// Old SSS Model >>>
readonly int m_CameraFilteringBuffer;
// <<< Old SSS Model

// 'm_CameraColorBuffer' does not contain diffuse lighting of SSS materials until the SSS pass.
// It is stored within 'm_CameraSubsurfaceBufferRT'.
// 'm_CameraColorBuffer' does not contain diffuse lighting of SSS materials until the SSS pass. It is stored within 'm_CameraSssDiffuseLightingBuffer'.
readonly RenderTargetIdentifier m_CameraDiffuseIrradianceBufferRT;
readonly RenderTargetIdentifier m_CameraSssDiffuseLightingBufferRT;
// Old SSS Model >>>
readonly RenderTargetIdentifier m_CameraFilteringBufferRT;
// <<< Old SSS Model

// whereas it work. Don't know what is hapening, DebugDisplay use the same code and name is correct there.
// Debug.Assert(m_DeferredMaterial != null);
m_CameraColorBuffer = HDShaderIDs._CameraColorTexture;
m_CameraColorBufferRT = new RenderTargetIdentifier(m_CameraColorBuffer);
m_CameraDiffuseIrradianceBuffer = HDShaderIDs._CameraDiffuseIrradianceTexture;
m_CameraDiffuseIrradianceBufferRT = new RenderTargetIdentifier(m_CameraDiffuseIrradianceBuffer);
m_CameraColorBuffer = HDShaderIDs._CameraColorTexture;
m_CameraColorBufferRT = new RenderTargetIdentifier(m_CameraColorBuffer);
m_CameraSssDiffuseLightingBuffer = HDShaderIDs._CameraSssDiffuseLightingBuffer;
m_CameraSssDiffuseLightingBufferRT = new RenderTargetIdentifier(m_CameraSssDiffuseLightingBuffer);
m_CameraFilteringBuffer = HDShaderIDs._CameraFilteringBuffer;
m_CameraFilteringBufferRT = new RenderTargetIdentifier(m_CameraFilteringBuffer);
// Old SSS Model >>>
m_CameraFilteringBuffer = HDShaderIDs._CameraFilteringBuffer;
m_CameraFilteringBufferRT = new RenderTargetIdentifier(m_CameraFilteringBuffer);
// <<< Old SSS Model
m_CopyStencilForSplitLighting = Utilities.CreateEngineMaterial("Hidden/HDRenderPipeline/CopyStencilBuffer");
m_CopyStencilForSplitLighting.EnableKeyword("EXPORT_HTILE");

public void CreateSssMaterials(bool useDisneySSS)
{
m_SubsurfaceScatteringKernel = m_SubsurfaceScatteringCS.FindKernel("SubsurfaceScattering");
Utilities.Destroy(m_CombineLightingPass);
m_CombineLightingPass = Utilities.CreateEngineMaterial("Hidden/HDRenderPipeline/CombineLighting");
// Old SSS Model >>>
Utilities.Destroy(m_SssVerticalFilterPass);

return;
}
RenderTargetIdentifier[] colorRTs = { m_CameraColorBufferRT, m_CameraDiffuseIrradianceBufferRT };
RenderTargetIdentifier[] colorRTs = { m_CameraColorBufferRT, m_CameraSssDiffuseLightingBufferRT };
// Output split lighting for materials asking for it (via stencil buffer)
// Output split lighting for materials asking for it (masked in the stencil buffer)
m_LightLoop.RenderDeferredLighting(hdCamera, cmd, m_DebugDisplaySettings, colorRTs, m_CameraDepthStencilBufferRT, depthTexture, true);
}

cmd.SetComputeVectorArrayParam(m_SubsurfaceScatteringCS, HDShaderIDs._FilterKernels, sssParameters.filterKernels);
cmd.SetComputeVectorArrayParam(m_SubsurfaceScatteringCS, HDShaderIDs._ShapeParams, sssParameters.shapeParams);
cmd.SetComputeTextureParam(m_SubsurfaceScatteringCS, m_SubsurfaceScatteringKernel, HDShaderIDs._GBufferTexture0, m_gbufferManager.GetGBuffers()[0]);
cmd.SetComputeTextureParam(m_SubsurfaceScatteringCS, m_SubsurfaceScatteringKernel, HDShaderIDs._GBufferTexture1, m_gbufferManager.GetGBuffers()[1]);
cmd.SetComputeTextureParam(m_SubsurfaceScatteringCS, m_SubsurfaceScatteringKernel, HDShaderIDs._GBufferTexture2, m_gbufferManager.GetGBuffers()[2]);
cmd.SetComputeTextureParam(m_SubsurfaceScatteringCS, m_SubsurfaceScatteringKernel, HDShaderIDs._GBufferTexture3, m_gbufferManager.GetGBuffers()[3]);
cmd.SetComputeTextureParam(m_SubsurfaceScatteringCS, m_SubsurfaceScatteringKernel, HDShaderIDs._DepthTexture, GetDepthTexture());
cmd.SetComputeTextureParam(m_SubsurfaceScatteringCS, m_SubsurfaceScatteringKernel, HDShaderIDs._StencilTexture, GetStencilTexture());
cmd.SetComputeTextureParam(m_SubsurfaceScatteringCS, m_SubsurfaceScatteringKernel, HDShaderIDs._HTile, GetHTile());
cmd.SetComputeTextureParam(m_SubsurfaceScatteringCS, m_SubsurfaceScatteringKernel, HDShaderIDs._IrradianceSource, m_CameraDiffuseIrradianceBufferRT);
cmd.SetComputeTextureParam(m_SubsurfaceScatteringCS, m_SubsurfaceScatteringKernel, HDShaderIDs._CameraColorTexture, m_CameraColorBufferRT);
cmd.SetComputeTextureParam(m_SubsurfaceScatteringCS, m_SubsurfaceScatteringKernel, HDShaderIDs._GBufferTexture0, m_gbufferManager.GetGBuffers()[0]);
cmd.SetComputeTextureParam(m_SubsurfaceScatteringCS, m_SubsurfaceScatteringKernel, HDShaderIDs._GBufferTexture1, m_gbufferManager.GetGBuffers()[1]);
cmd.SetComputeTextureParam(m_SubsurfaceScatteringCS, m_SubsurfaceScatteringKernel, HDShaderIDs._GBufferTexture2, m_gbufferManager.GetGBuffers()[2]);
cmd.SetComputeTextureParam(m_SubsurfaceScatteringCS, m_SubsurfaceScatteringKernel, HDShaderIDs._GBufferTexture3, m_gbufferManager.GetGBuffers()[3]);
cmd.SetComputeTextureParam(m_SubsurfaceScatteringCS, m_SubsurfaceScatteringKernel, HDShaderIDs._DepthTexture, GetDepthTexture());
cmd.SetComputeTextureParam(m_SubsurfaceScatteringCS, m_SubsurfaceScatteringKernel, HDShaderIDs._StencilTexture, GetStencilTexture());
cmd.SetComputeTextureParam(m_SubsurfaceScatteringCS, m_SubsurfaceScatteringKernel, HDShaderIDs._HTile, GetHTile());
cmd.SetComputeTextureParam(m_SubsurfaceScatteringCS, m_SubsurfaceScatteringKernel, HDShaderIDs._IrradianceSource, m_CameraSssDiffuseLightingBufferRT);
cmd.SetComputeTextureParam(m_SubsurfaceScatteringCS, m_SubsurfaceScatteringKernel, HDShaderIDs._CameraColorTexture, m_CameraColorBufferRT);
cmd.SetComputeTextureParam(m_SubsurfaceScatteringCS, m_SubsurfaceScatteringKernel, HDShaderIDs._CameraFilteringBuffer, m_CameraFilteringBufferRT);
// Perform the SSS filtering pass which fills 'm_CameraFilteringBufferRT'.
cmd.SetGlobalTexture(HDShaderIDs._IrradianceSource, m_CameraFilteringBufferRT); // Cannot set a RT on a material
// Combine diffuse and specular lighting into 'm_CameraColorBufferRT'.
Utilities.DrawFullScreen(cmd, m_CombineLightingPass, m_CameraColorBufferRT, m_CameraDepthStencilBufferRT);
// Perform the vertical SSS filtering pass.
cmd.SetGlobalTexture(HDShaderIDs._IrradianceSource, m_CameraDiffuseIrradianceBufferRT); // Cannot set a RT on a material
cmd.SetGlobalTexture(HDShaderIDs._IrradianceSource, m_CameraSssDiffuseLightingBufferRT); // Cannot set a RT on a material
// Perform the vertical SSS filtering pass which fills 'm_CameraFilteringBufferRT'.
// Perform the horizontal SSS filtering pass, and combine diffuse and specular lighting.
// Perform the horizontal SSS filtering pass, and combine diffuse and specular lighting into 'm_CameraColorBufferRT'.
Utilities.DrawFullScreen(cmd, m_SssHorizontalFilterAndCombinePass, m_CameraColorBufferRT, m_CameraDepthStencilBufferRT);
}
}

int w = camera.pixelWidth;
int h = camera.pixelHeight;
cmd.GetTemporaryRT(m_CameraColorBuffer, w, h, 0, FilterMode.Point, RenderTextureFormat.ARGBHalf, RenderTextureReadWrite.Linear, 1, true); // Enable UAV
cmd.GetTemporaryRT(m_CameraDiffuseIrradianceBuffer, w, h, 0, FilterMode.Point, RenderTextureFormat.RGB111110Float, RenderTextureReadWrite.Linear, 1, true); // Enable UAV
// Old SSS Model >>>
cmd.GetTemporaryRT(m_CameraFilteringBuffer, w, h, 0, FilterMode.Point, RenderTextureFormat.RGB111110Float, RenderTextureReadWrite.Linear, 1, true); // Enable UAV
// <<< Old SSS Model
cmd.GetTemporaryRT(m_CameraColorBuffer, w, h, 0, FilterMode.Point, RenderTextureFormat.ARGBHalf, RenderTextureReadWrite.Linear, 1, true); // Enable UAV
cmd.GetTemporaryRT(m_CameraSssDiffuseLightingBuffer, w, h, 0, FilterMode.Point, RenderTextureFormat.RGB111110Float, RenderTextureReadWrite.Linear, 1, true); // Enable UAV
cmd.GetTemporaryRT(m_CameraFilteringBuffer, w, h, 0, FilterMode.Point, RenderTextureFormat.RGB111110Float, RenderTextureReadWrite.Linear, 1, true); // Enable UAV
if (!m_Asset.renderingSettings.ShouldUseForwardRenderingOnly())
{

// Clear the diffuse SSS lighting target
using (new Utilities.ProfilingSample("Clear SSS diffuse target", cmd))
{
Utilities.SetRenderTarget(cmd, m_CameraDiffuseIrradianceBufferRT, m_CameraDepthStencilBufferRT, ClearFlag.ClearColor, Color.black);
Utilities.SetRenderTarget(cmd, m_CameraSssDiffuseLightingBufferRT, m_CameraDepthStencilBufferRT, ClearFlag.ClearColor, Color.black);
}
// Old SSS Model >>>

12
Assets/ScriptableRenderPipeline/HDRenderPipeline/HDShaderIDs.cs
查看文件


internal static readonly int _PrevViewProjMatrix = Shader.PropertyToID("_PrevViewProjMatrix");
internal static readonly int _FrustumPlanes = Shader.PropertyToID("_FrustumPlanes");
internal static readonly int _DepthTexture = Shader.PropertyToID("_DepthTexture");
internal static readonly int _CameraColorTexture = Shader.PropertyToID("_CameraColorTexture");
internal static readonly int _CameraSssDiffuseLightingBuffer = Shader.PropertyToID("_CameraSssDiffuseLightingTexture");
internal static readonly int _CameraFilteringBuffer = Shader.PropertyToID("_CameraFilteringTexture");
internal static readonly int _IrradianceSource = Shader.PropertyToID("_IrradianceSource");
internal static readonly int _CameraColorTexture = Shader.PropertyToID("_CameraColorTexture");
internal static readonly int _CameraDiffuseIrradianceTexture = Shader.PropertyToID("_CameraDiffuseIrradianceTexture");
internal static readonly int _CameraFilteringBuffer = Shader.PropertyToID("_CameraFilteringBuffer");
internal static readonly int _DepthTexture = Shader.PropertyToID("_DepthTexture");
internal static readonly int _IrradianceSource = Shader.PropertyToID("_IrradianceSource");
internal static readonly int _FilterKernelsBasic = Shader.PropertyToID("_FilterKernelsBasic");
internal static readonly int _HalfRcpWeightedVariances = Shader.PropertyToID("_HalfRcpWeightedVariances");

27
Assets/ScriptableRenderPipeline/HDRenderPipeline/Material/Lit/Resources/SubsurfaceScattering.compute
查看文件


float4 _WorldScales[SSS_N_PROFILES]; // Size of the world unit in meters (only the X component is used)
float4 _FilterKernels[SSS_N_PROFILES][SSS_N_SAMPLES_NEAR_FIELD]; // XY = near field, ZW = far field; 0 = radius, 1 = reciprocal of the PDF
DECLARE_GBUFFER_TEXTURE(_GBufferTexture); // Contains the albedo and SSS parameters
TEXTURE2D(_DepthTexture); // Z-buffer
TEXTURE2D(_StencilTexture); // DXGI_FORMAT_R8_UINT is not supported by Unity
TEXTURE2D(_HTile); // DXGI_FORMAT_R8_UINT is not supported by Unity
TEXTURE2D(_IrradianceSource); // Includes transmitted light
// Contains the HDR color for non-SSS materials.
// In case of SSS, it only contains the specular lighting, which we additively blend with the SSS lighting.
RW_TEXTURE2D(float4, _CameraColorTexture);
DECLARE_GBUFFER_TEXTURE(_GBufferTexture); // Contains the albedo and SSS parameters
TEXTURE2D(_DepthTexture); // Z-buffer
TEXTURE2D(_StencilTexture); // DXGI_FORMAT_R8_UINT is not supported by Unity
TEXTURE2D(_HTile); // DXGI_FORMAT_R8_UINT is not supported by Unity
TEXTURE2D(_IrradianceSource); // Includes transmitted light
RW_TEXTURE2D(float4, _CameraFilteringTexture); // Target texture
//--------------------------------------------------------------------------------------------------
// Implementation

[branch] if (distScale == 0 || maxDistInPixels < 1)
{
#if SSS_DEBUG_LOD
_CameraColorTexture[pixelCoord] = float4(0, 0, 1, 1);
_CameraFilteringTexture[pixelCoord] = float4(0, 0, 1, 1);
_CameraColorTexture[pixelCoord] += float4(bsdfData.diffuseColor * centerIrradiance, 1);
_CameraFilteringTexture[pixelCoord] = float4(bsdfData.diffuseColor * centerIrradiance, 1);
#endif
return;
}

// We expect the view-space normal to be front-facing.
if (normalVS.z >= 0)
{
_CameraColorTexture[pixelCoord] = float4(1, 1, 1, 1);
_CameraFilteringTexture[pixelCoord] = float4(1, 1, 1, 1);
return;
}
#endif

#if SSS_DEBUG_LOD
_CameraColorTexture[pixelCoord] = useNearFieldKernel ? float4(1, 0, 0, 1) : float4(0.5, 0.5, 0, 1);
_CameraFilteringTexture[pixelCoord] = useNearFieldKernel ? float4(1, 0, 0, 1) : float4(0.5, 0.5, 0, 1);
return;
#endif

[branch] if (!useNearFieldKernel)
{
_CameraColorTexture[pixelCoord] += float4(bsdfData.diffuseColor * totalIrradiance / totalWeight, 1);
_CameraFilteringTexture[pixelCoord] = float4(bsdfData.diffuseColor * totalIrradiance / totalWeight, 1);
return;
}

totalIrradiance, totalWeight);
}
_CameraColorTexture[pixelCoord] += float4(bsdfData.diffuseColor * totalIrradiance / totalWeight, 1);
_CameraFilteringTexture[pixelCoord] = float4(bsdfData.diffuseColor * totalIrradiance / totalWeight, 1);
}

56
Assets/ScriptableRenderPipeline/HDRenderPipeline/Material/Lit/Resources/CombineLighting.shader
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Shader "Hidden/HDRenderPipeline/CombineLighting"
{
SubShader
{
Pass
{
Stencil
{
Ref 1 // StencilLightingUsage.SplitLighting
Comp Equal
Pass Keep
}
Cull Off
ZTest Always
ZWrite Off
Blend One One // Additive
HLSLPROGRAM
#pragma target 4.5
#pragma only_renderers d3d11 ps4 metal // TEMP: until we go further in dev
// #pragma enable_d3d11_debug_symbols
#pragma vertex Vert
#pragma fragment Frag
#include "../../../../ShaderLibrary/Common.hlsl"
TEXTURE2D(_IrradianceSource);
struct Attributes
{
uint vertexID : SV_VertexID;
};
struct Varyings
{
float4 positionCS : SV_Position;
};
Varyings Vert(Attributes input)
{
Varyings output;
output.positionCS = GetFullScreenTriangleVertexPosition(input.vertexID);
return output;
}
float4 Frag(Varyings input) : SV_Target
{
return LOAD_TEXTURE2D(_IrradianceSource, input.positionCS.xy);
}
ENDHLSL
}
}
Fallback Off
}

10
Assets/ScriptableRenderPipeline/HDRenderPipeline/Material/Lit/Resources/CombineLighting.shader.meta
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fileFormatVersion: 2
guid: 2e37131331fbdca449b1a2bc47a639ca
timeCreated: 1502125437
licenseType: Pro
ShaderImporter:
externalObjects: {}
defaultTextures: []
userData:
assetBundleName:
assetBundleVariant:
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