internal bool Setup(ScreenSpaceAmbientOcclusionSettings featureSettings, ScriptableRenderer renderer)
{
this.renderPassEvent = featureSettings.AfterOpaque ? RenderPassEvent.AfterRenderingOpaques : RenderPassEvent.AfterRenderingGbuffer;
m_Renderer = renderer;
m_CurrentSettings = featureSettings;
ScreenSpaceAmbientOcclusionSettings.DepthSource source = this.isRendererDeferred
? ScreenSpaceAmbientOcclusionSettings.DepthSource.DepthNormals
: m_CurrentSettings.Source;
switch (source)
{
case ScreenSpaceAmbientOcclusionSettings.DepthSource.Depth:
ConfigureInput(ScriptableRenderPassInput.Depth);
break;
case ScreenSpaceAmbientOcclusionSettings.DepthSource.DepthNormals:
ConfigureInput(ScriptableRenderPassInput.Normal); // need depthNormal prepass for forward-only geometry
break;
default:
throw new ArgumentOutOfRangeException();
}
return(material != null &&
m_CurrentSettings.Intensity > 0.0f &&
m_CurrentSettings.Radius > 0.0f &&
m_CurrentSettings.SampleCount > 0);
}
/// <inheritdoc/>
public override void OnCameraSetup(CommandBuffer cmd, ref RenderingData renderingData)
{
RenderTextureDescriptor cameraTargetDescriptor = renderingData.cameraData.cameraTargetDescriptor;
int downsampleDivider = m_CurrentSettings.Downsample ? 2 : 1;
// Update SSAO parameters in the material
Vector4 ssaoParams = new Vector4(
m_CurrentSettings.Intensity, // Intensity
m_CurrentSettings.Radius, // Radius
1.0f / downsampleDivider, // Downsampling
m_CurrentSettings.SampleCount // Sample count
);
m_Material.SetVector(s_SSAOParamsID, ssaoParams);
#if ENABLE_VR && ENABLE_XR_MODULE
int eyeCount = renderingData.cameraData.xr.enabled && renderingData.cameraData.xr.singlePassEnabled ? 2 : 1;
#else
int eyeCount = 1;
#endif
for (int eyeIndex = 0; eyeIndex < eyeCount; eyeIndex++)
{
Matrix4x4 view = renderingData.cameraData.GetViewMatrix(eyeIndex);
Matrix4x4 proj = renderingData.cameraData.GetProjectionMatrix(eyeIndex);
m_CameraViewProjections[eyeIndex] = proj * view;
// camera view space without translation, used by SSAO.hlsl ReconstructViewPos() to calculate view vector.
Matrix4x4 cview = view;
cview.SetColumn(3, new Vector4(0.0f, 0.0f, 0.0f, 1.0f));
Matrix4x4 cviewProj = proj * cview;
Matrix4x4 cviewProjInv = cviewProj.inverse;
Vector4 topLeftCorner = cviewProjInv.MultiplyPoint(new Vector4(-1, 1, -1, 1));
Vector4 topRightCorner = cviewProjInv.MultiplyPoint(new Vector4(1, 1, -1, 1));
Vector4 bottomLeftCorner = cviewProjInv.MultiplyPoint(new Vector4(-1, -1, -1, 1));
Vector4 farCentre = cviewProjInv.MultiplyPoint(new Vector4(0, 0, 1, 1));
m_CameraTopLeftCorner[eyeIndex] = topLeftCorner;
m_CameraXExtent[eyeIndex] = topRightCorner - topLeftCorner;
m_CameraYExtent[eyeIndex] = bottomLeftCorner - topLeftCorner;
m_CameraZExtent[eyeIndex] = farCentre;
}
m_Material.SetVector(s_ProjectionParams2ID, new Vector4(1.0f / renderingData.cameraData.camera.nearClipPlane, 0.0f, 0.0f, 0.0f));
m_Material.SetMatrixArray(s_CameraViewProjectionsID, m_CameraViewProjections);
m_Material.SetVectorArray(s_CameraViewTopLeftCornerID, m_CameraTopLeftCorner);
m_Material.SetVectorArray(s_CameraViewXExtentID, m_CameraXExtent);
m_Material.SetVectorArray(s_CameraViewYExtentID, m_CameraYExtent);
m_Material.SetVectorArray(s_CameraViewZExtentID, m_CameraZExtent);
// Update keywords
CoreUtils.SetKeyword(m_Material, k_OrthographicCameraKeyword, renderingData.cameraData.camera.orthographic);
ScreenSpaceAmbientOcclusionSettings.DepthSource source = this.isRendererDeferred
? ScreenSpaceAmbientOcclusionSettings.DepthSource.DepthNormals
: m_CurrentSettings.Source;
if (source == ScreenSpaceAmbientOcclusionSettings.DepthSource.Depth)
{
switch (m_CurrentSettings.NormalSamples)
{
case ScreenSpaceAmbientOcclusionSettings.NormalQuality.Low:
CoreUtils.SetKeyword(m_Material, k_NormalReconstructionLowKeyword, true);
CoreUtils.SetKeyword(m_Material, k_NormalReconstructionMediumKeyword, false);
CoreUtils.SetKeyword(m_Material, k_NormalReconstructionHighKeyword, false);
break;
case ScreenSpaceAmbientOcclusionSettings.NormalQuality.Medium:
CoreUtils.SetKeyword(m_Material, k_NormalReconstructionLowKeyword, false);
CoreUtils.SetKeyword(m_Material, k_NormalReconstructionMediumKeyword, true);
CoreUtils.SetKeyword(m_Material, k_NormalReconstructionHighKeyword, false);
break;
case ScreenSpaceAmbientOcclusionSettings.NormalQuality.High:
CoreUtils.SetKeyword(m_Material, k_NormalReconstructionLowKeyword, false);
CoreUtils.SetKeyword(m_Material, k_NormalReconstructionMediumKeyword, false);
CoreUtils.SetKeyword(m_Material, k_NormalReconstructionHighKeyword, true);
break;
default:
throw new ArgumentOutOfRangeException();
}
}
switch (source)
{
case ScreenSpaceAmbientOcclusionSettings.DepthSource.DepthNormals:
CoreUtils.SetKeyword(m_Material, k_SourceDepthKeyword, false);
CoreUtils.SetKeyword(m_Material, k_SourceDepthNormalsKeyword, true);
break;
default:
CoreUtils.SetKeyword(m_Material, k_SourceDepthKeyword, true);
CoreUtils.SetKeyword(m_Material, k_SourceDepthNormalsKeyword, false);
break;
}
// Set up the descriptors
RenderTextureDescriptor descriptor = cameraTargetDescriptor;
descriptor.msaaSamples = 1;
descriptor.depthBufferBits = 0;
m_AOPassDescriptor = descriptor;
m_AOPassDescriptor.width /= downsampleDivider;
m_AOPassDescriptor.height /= downsampleDivider;
m_AOPassDescriptor.colorFormat = RenderTextureFormat.ARGB32;
m_BlurPassesDescriptor = descriptor;
m_BlurPassesDescriptor.colorFormat = RenderTextureFormat.ARGB32;
m_FinalDescriptor = descriptor;
m_FinalDescriptor.colorFormat = m_SupportsR8RenderTextureFormat ? RenderTextureFormat.R8 : RenderTextureFormat.ARGB32;
// Get temporary render textures
cmd.GetTemporaryRT(s_SSAOTexture1ID, m_AOPassDescriptor, FilterMode.Bilinear);
cmd.GetTemporaryRT(s_SSAOTexture2ID, m_BlurPassesDescriptor, FilterMode.Bilinear);
cmd.GetTemporaryRT(s_SSAOTexture3ID, m_BlurPassesDescriptor, FilterMode.Bilinear);
cmd.GetTemporaryRT(s_SSAOTextureFinalID, m_FinalDescriptor, FilterMode.Bilinear);
// Configure targets and clear color
ConfigureTarget(m_CurrentSettings.AfterOpaque ? m_Renderer.cameraColorTarget : s_SSAOTexture2ID);
ConfigureClear(ClearFlag.None, Color.white);
}