// Combines specular lighting and diffuse lighting with subsurface scattering.
void CombineSubsurfaceScattering(HDCamera hdCamera, ScriptableRenderContext context, SubsurfaceScatteringParameters sssParameters)
{
// Currently, forward-rendered objects do not output split lighting required for the SSS pass.
if (m_Owner.renderingSettings.ShouldUseForwardRenderingOnly())
{
return;
}
var cmd = new CommandBuffer()
{
name = "Subsurface Scattering Pass"
};
// Perform the vertical SSS filtering pass.
m_FilterSubsurfaceScattering.SetMatrix("_InvProjMatrix", hdCamera.invProjectionMatrix);
m_FilterSubsurfaceScattering.SetVectorArray("_FilterKernels", sssParameters.filterKernels);
m_FilterSubsurfaceScattering.SetVectorArray("_HalfRcpWeightedVariances", sssParameters.halfRcpWeightedVariances);
cmd.SetGlobalTexture("_IrradianceSource", m_CameraSubsurfaceBufferRT);
Utilities.DrawFullScreen(cmd, m_FilterSubsurfaceScattering, hdCamera,
m_CameraFilteringBufferRT, m_CameraStencilBufferRT);
// Perform the horizontal SSS filtering pass, and combine diffuse and specular lighting.
m_FilterAndCombineSubsurfaceScattering.SetMatrix("_InvProjMatrix", hdCamera.invProjectionMatrix);
m_FilterAndCombineSubsurfaceScattering.SetVectorArray("_FilterKernels", sssParameters.filterKernels);
m_FilterAndCombineSubsurfaceScattering.SetVectorArray("_HalfRcpWeightedVariances", sssParameters.halfRcpWeightedVariances);
cmd.SetGlobalTexture("_IrradianceSource", m_CameraFilteringBufferRT);
Utilities.DrawFullScreen(cmd, m_FilterAndCombineSubsurfaceScattering, hdCamera,
m_CameraColorBufferRT, m_CameraStencilBufferRT);
context.ExecuteCommandBuffer(cmd);
cmd.Dispose();
}
void FilterCubemapCommon(CommandBuffer cmd,
Texture source, RenderTexture target, int mipCount,
Matrix4x4[] worldToViewMatrices)
{
// Solid angle associated with a texel of the cubemap.
float invOmegaP = (6.0f * source.width * source.width) / (4.0f * Mathf.PI);
m_GgxConvolveMaterial.SetTexture("_MainTex", source);
m_GgxConvolveMaterial.SetTexture("_GgxIblSamples", m_GgxIblSampleData);
m_GgxConvolveMaterial.SetFloat("_LastLevel", mipCount - 1);
m_GgxConvolveMaterial.SetFloat("_InvOmegaP", invOmegaP);
for (int mip = 1; mip < ((int)EnvConstants.SpecCubeLodStep + 1); ++mip)
{
string sampleName = String.Format("Filter Cubemap Mip {0}", mip);
cmd.BeginSample(sampleName);
for (int face = 0; face < 6; ++face)
{
Vector4 faceSize = new Vector4(source.width >> mip, source.height >> mip, 1.0f / (source.width >> mip), 1.0f / (source.height >> mip));
Matrix4x4 transform = SkyManager.ComputePixelCoordToWorldSpaceViewDirectionMatrix(0.5f * Mathf.PI, faceSize, worldToViewMatrices[face], true);
MaterialPropertyBlock props = new MaterialPropertyBlock();
props.SetFloat("_Level", mip);
props.SetMatrix(HDShaderIDs._PixelCoordToViewDirWS, transform);
Utilities.SetRenderTarget(cmd, target, ClearFlag.ClearNone, mip, (CubemapFace)face);
Utilities.DrawFullScreen(cmd, m_GgxConvolveMaterial, props);
}
cmd.EndSample(sampleName);
}
}
public void Render(ScreenSpaceAmbientOcclusionSettings.Settings settings, HDRenderPipeline hdRP, HDCamera hdCamera, ScriptableRenderContext renderContext, CommandBuffer cmd, bool isForward)
{
const RenderTextureFormat kTempFormat = RenderTextureFormat.ARGB32;
const RenderTextureReadWrite kRWMode = RenderTextureReadWrite.Linear;
const FilterMode kFilter = FilterMode.Bilinear;
// Note: Currently there is no SSAO in forward as we don't have normal buffer
// If SSAO is disable, simply put a white 1x1 texture
if (settings.enable == false || isForward)
{
cmd.SetGlobalTexture(HDShaderIDs._AmbientOcclusionTexture, UnityEngine.Rendering.PostProcessing.RuntimeUtilities.blackTexture); // Neutral is black, see the comment in the shaders
cmd.SetGlobalFloat(HDShaderIDs._AmbientOcclusionDirectLightStrenght, 0.0f);
return;
}
var width = hdCamera.camera.pixelWidth;
var height = hdCamera.camera.pixelHeight;
var downsize = settings.downsampling ? 2 : 1;
// Provide the settings via uniforms.
m_Material.SetFloat(Uniforms._Intensity, settings.intensity);
m_Material.SetFloat(Uniforms._Radius, settings.radius);
m_Material.SetFloat(Uniforms._Downsample, 1.0f / downsize);
m_Material.SetFloat(Uniforms._SampleCount, settings.sampleCount);
using (new Utilities.ProfilingSample("Screenspace ambient occlusion", cmd))
{
// AO estimation.
cmd.GetTemporaryRT(Uniforms._TempTex1, width / downsize, height / downsize, 0, kFilter, kTempFormat, kRWMode);
Utilities.DrawFullScreen(cmd, m_Material, Uniforms._TempTex1, null, 0);
hdRP.PushFullScreenDebugTexture(cmd, Uniforms._TempTex1, hdCamera.camera, renderContext, FullScreenDebugMode.SSAOBeforeFiltering);
// Denoising (horizontal pass).
cmd.GetTemporaryRT(Uniforms._TempTex2, width, height, 0, kFilter, kTempFormat, kRWMode);
cmd.SetGlobalTexture(Uniforms._MainTex, Uniforms._TempTex1);
Utilities.DrawFullScreen(cmd, m_Material, Uniforms._TempTex2, null, 1);
cmd.ReleaseTemporaryRT(Uniforms._TempTex1);
// Denoising (vertical pass).
cmd.GetTemporaryRT(Uniforms._TempTex1, width, height, 0, kFilter, kTempFormat, kRWMode);
cmd.SetGlobalTexture(Uniforms._MainTex, Uniforms._TempTex2);
Utilities.DrawFullScreen(cmd, m_Material, Uniforms._TempTex1, null, 2);
cmd.ReleaseTemporaryRT(Uniforms._TempTex2);
// Final filtering
cmd.GetTemporaryRT(Uniforms._AOBuffer, width, height, 0, kFilter, GetAOBufferFormat(), kRWMode);
cmd.SetGlobalTexture(Uniforms._MainTex, Uniforms._TempTex1);
Utilities.DrawFullScreen(cmd, m_Material, Uniforms._AOBuffer, null, 3);
cmd.ReleaseTemporaryRT(Uniforms._TempTex1);
// Setup texture for lighting pass (automatic of unity)
cmd.SetGlobalTexture(HDShaderIDs._AmbientOcclusionTexture, Uniforms._AOBuffer);
cmd.SetGlobalFloat(HDShaderIDs._AmbientOcclusionDirectLightStrenght, settings.affectDirectLigthingStrenght);
hdRP.PushFullScreenDebugTexture(cmd, Uniforms._AOBuffer, hdCamera.camera, renderContext, FullScreenDebugMode.SSAO);
}
}
public override void RenderSky(BuiltinSkyParameters builtinParams, SkySettings skyParameters, bool renderForCubemap)
{
m_SkyHDRIMaterial.SetTexture(HDShaderIDs._Cubemap, m_HdriSkyParams.skyHDRI);
m_SkyHDRIMaterial.SetVector(HDShaderIDs._SkyParam, new Vector4(m_HdriSkyParams.exposure, m_HdriSkyParams.multiplier, m_HdriSkyParams.rotation, 0.0f));
// This matrix needs to be updated at the draw call frequency.
MaterialPropertyBlock properties = new MaterialPropertyBlock();
properties.SetMatrix(HDShaderIDs._PixelCoordToViewDirWS, builtinParams.pixelCoordToViewDirMatrix);
Utilities.DrawFullScreen(builtinParams.commandBuffer, m_SkyHDRIMaterial, properties, renderForCubemap ? 0 : 1);
}
override public void RenderSky(BuiltinSkyParameters builtinParams, SkySettings skyParameters, bool renderForCubemap)
{
MaterialPropertyBlock properties = new MaterialPropertyBlock();
// Define select preprocessor symbols.
SetKeywords(builtinParams, m_ProceduralSkySettings, renderForCubemap);
// Set shader constants.
SetUniforms(builtinParams, m_ProceduralSkySettings, renderForCubemap, ref properties);
Utilities.DrawFullScreen(builtinParams.commandBuffer, m_ProceduralSkyMaterial, properties);
}
public override void RenderInit(CommandBuffer cmd)
{
if (m_isInit)
{
return;
}
using (new Utilities.ProfilingSample("Init PreFGD", cmd))
{
Utilities.DrawFullScreen(cmd, m_InitPreFGD, new RenderTargetIdentifier(m_PreIntegratedFGD));
}
m_isInit = true;
}