487 lines
19 KiB
C#
487 lines
19 KiB
C#
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using System;
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using System.Collections.Generic;
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using UnityEditor;
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using UnityEngine.Rendering;
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namespace UnityEngine.Experimental.Rendering
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{
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/// <summary>
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/// Set of data used to create a XRPass object.
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/// </summary>
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public struct XRPassCreateInfo
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{
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internal RenderTargetIdentifier renderTarget;
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internal RenderTextureDescriptor renderTargetDesc;
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internal RenderTargetIdentifier motionVectorRenderTarget;
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internal RenderTextureDescriptor motionVectorRenderTargetDesc;
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internal ScriptableCullingParameters cullingParameters;
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internal Material occlusionMeshMaterial;
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internal float occlusionMeshScale;
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internal IntPtr foveatedRenderingInfo;
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internal int multipassId;
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internal int cullingPassId;
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internal bool copyDepth;
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internal bool hasMotionVectorPass;
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#if ENABLE_VR && ENABLE_XR_MODULE
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internal UnityEngine.XR.XRDisplaySubsystem.XRRenderPass xrSdkRenderPass;
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#endif
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}
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/// <summary>
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/// XRPass holds the render target information and a list of XRView.
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/// XRView contains the parameters required to render (projection and view matrices, viewport, etc)
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/// When a pass has 2 views or more, single-pass will be active if the platform supports it.
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/// To avoid allocating every frame, XRView is a struct and XRPass is pooled.
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/// </summary>
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public class XRPass
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{
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readonly List<XRView> m_Views;
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readonly XROcclusionMesh m_OcclusionMesh;
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/// <summary>
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/// Parameterless constructor.
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/// Note: in order to avoid GC, the render pipeline should use XRPass.Create instead of this method.
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/// </summary>
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public XRPass()
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{
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m_Views = new List<XRView>(2);
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m_OcclusionMesh = new XROcclusionMesh(this);
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}
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/// <summary>
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/// Default allocator method for XRPass.
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/// </summary>
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/// <param name="createInfo"> A descriptor used to create and initialize the XRPass. </param>
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/// <returns> Default XRPass created from createInfo descriptor. </returns>
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public static XRPass CreateDefault(XRPassCreateInfo createInfo)
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{
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XRPass pass = GenericPool<XRPass>.Get();
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pass.InitBase(createInfo);
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return pass;
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}
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/// <summary>
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/// Default release method. Can be overridden by render pipelines.
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/// </summary>
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virtual public void Release()
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{
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GenericPool<XRPass>.Release(this);
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}
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/// <summary>
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/// Returns true if the pass contains at least one view.
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/// </summary>
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public bool enabled
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{
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#if ENABLE_VR && ENABLE_XR_MODULE
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get => viewCount > 0;
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#else
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get => false;
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#endif
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}
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/// <summary>
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/// Returns true if the pass can use foveated rendering commands.
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/// </summary>
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public bool supportsFoveatedRendering
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{
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#if ENABLE_VR && ENABLE_XR_MODULE
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get => enabled && foveatedRenderingInfo != IntPtr.Zero && XRSystem.foveatedRenderingCaps != FoveatedRenderingCaps.None;
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#else
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get => false;
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#endif
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}
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/// <summary>
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/// If true, the render pipeline is expected to output a valid depth buffer to the renderTarget.
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/// </summary>
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public bool copyDepth { get; private set; }
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/// <summary>
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/// If true, the render pipeline is expected to generate motion data and output to the motionVectorRenderTarget.
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/// </summary>
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public bool hasMotionVectorPass { get; private set; }
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/// <summary>
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/// If true, is the first pass of a xr camera
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/// </summary>
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public bool isFirstCameraPass => multipassId == 0;
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/// <summary>
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/// If true, is the last pass of a xr camera
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/// Multipass last pass: pass ID == 1, viewCount == 1
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/// Singlepass last pass: pass ID == 0, viewCount ==2
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/// Emptypass(non-XR) last pass: pass ID == 0, viewCount == 0
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/// </summary>
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public bool isLastCameraPass => (multipassId == 1 && viewCount <= 1) || (multipassId == 0 && viewCount > 1) || (multipassId == 0 && viewCount == 0) /* ViewCount 0 handles the empty pass*/;
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/// <summary>
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/// Index of the pass inside the frame.
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/// </summary>
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public int multipassId { get; private set; }
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/// <summary>
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/// Index used for culling. It can be shared between multiple passes.
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/// </summary>
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public int cullingPassId { get; private set; }
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/// <summary>
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/// Destination render target.
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/// </summary>
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public RenderTargetIdentifier renderTarget { get; private set; }
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/// <summary>
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/// Destination render target descriptor.
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/// </summary>
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public RenderTextureDescriptor renderTargetDesc { get; private set; }
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/// <summary>
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/// Destination render target for motion vectors
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/// </summary>
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public RenderTargetIdentifier motionVectorRenderTarget { get; private set; }
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/// <summary>
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/// Destination render target descriptor for motion vectors.
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/// </summary>
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public RenderTextureDescriptor motionVectorRenderTargetDesc { get; private set; }
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/// <summary>
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/// Parameters used for culling.
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/// </summary>
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public ScriptableCullingParameters cullingParams { get; private set; }
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/// <summary>
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/// Returns the number of views inside this pass.
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/// </summary>
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public int viewCount { get => m_Views.Count; }
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/// <summary>
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/// If true, the render pipeline is expected to use single-pass techniques to save CPU time.
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/// </summary>
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public bool singlePassEnabled { get => viewCount > 1; }
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/// <summary>
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/// Native pointer from the XR plugin to be consumed by ConfigureFoveatedRendering.
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/// </summary>
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public IntPtr foveatedRenderingInfo { get; private set; }
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/// <summary>
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/// Returns true when the active display has HDR enabled.
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/// </summary>
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public bool isHDRDisplayOutputActive
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{
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#if ENABLE_VR && ENABLE_XR_MODULE
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get => XRSystem.GetActiveDisplay().hdrOutputSettings?.active ?? false;
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#else
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get => false;
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#endif
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}
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/// <summary>
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/// Returns color gamut of the active HDR display.
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/// </summary>
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public ColorGamut hdrDisplayOutputColorGamut
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{
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#if ENABLE_VR && ENABLE_XR_MODULE
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get => XRSystem.GetActiveDisplay().hdrOutputSettings?.displayColorGamut ?? ColorGamut.sRGB;
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#else
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get => ColorGamut.sRGB;
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#endif
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}
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/// <summary>
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/// Returns HDR display information of the active HDR display.
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/// </summary>
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public HDROutputUtils.HDRDisplayInformation hdrDisplayOutputInformation
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{
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#if ENABLE_VR && ENABLE_XR_MODULE
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get => new HDROutputUtils.HDRDisplayInformation(
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XRSystem.GetActiveDisplay().hdrOutputSettings?.maxFullFrameToneMapLuminance ?? -1,
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XRSystem.GetActiveDisplay().hdrOutputSettings?.maxToneMapLuminance ?? -1,
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XRSystem.GetActiveDisplay().hdrOutputSettings?.minToneMapLuminance ?? -1,
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XRSystem.GetActiveDisplay().hdrOutputSettings?.paperWhiteNits ?? 160.0f
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);
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#else
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get => new HDROutputUtils.HDRDisplayInformation(-1, -1, -1, 160.0f);
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#endif
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}
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/// <summary>
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/// Scaling factor used when drawing the occlusion mesh.
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/// </summary>
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public float occlusionMeshScale { get; private set; }
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/// <summary>
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/// Returns the projection matrix for a given view.
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/// </summary>
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/// <param name="viewIndex"> Index of XRView to retrieve the data from. </param>
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/// <returns> XR projection matrix for the specified XRView. </returns>
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public Matrix4x4 GetProjMatrix(int viewIndex = 0)
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{
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return m_Views[viewIndex].projMatrix;
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}
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/// <summary>
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/// Returns the view matrix for a given view.
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/// </summary>
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/// <param name="viewIndex"> Index of XRView to retrieve the data from. </param>
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/// <returns> XR view matrix for the specified XRView. </returns>
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public Matrix4x4 GetViewMatrix(int viewIndex = 0)
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{
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return m_Views[viewIndex].viewMatrix;
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}
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/// <summary>
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/// Returns true if the previous frame view matrix for a given view is valid.
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/// </summary>
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/// <param name="viewIndex"> Index of XRView to retrieve the data from. </param>
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/// <returns> Boolean describing if previous frame view matrix for a given view is valid. </returns>
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public bool GetPrevViewValid(int viewIndex = 0)
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{
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return m_Views[viewIndex].isPrevViewMatrixValid;
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}
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/// <summary>
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/// Returns the previous frame view matrix for a given view.
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/// </summary>
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/// <param name="viewIndex"> Index of XRView to retrieve the data from. </param>
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/// <returns> Previous frame XR view matrix for the specified XRView. </returns>
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public Matrix4x4 GetPrevViewMatrix(int viewIndex = 0)
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{
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return m_Views[viewIndex].prevViewMatrix;
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}
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/// <summary>
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/// Returns the viewport for a given view.
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/// </summary>
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/// <param name="viewIndex"> Index of XRView to retrieve the data from. </param>
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/// <returns> XR viewport rect for the specified XRView. </returns>
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public Rect GetViewport(int viewIndex = 0)
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{
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return m_Views[viewIndex].viewport;
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}
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/// <summary>
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/// Returns the occlusion mesh for a given view.
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/// </summary>
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/// <param name="viewIndex"> Index of XRView to retrieve the data from. </param>
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/// <returns> XR occlusion mesh for the specified XRView. </returns>
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public Mesh GetOcclusionMesh(int viewIndex = 0)
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{
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return m_Views[viewIndex].occlusionMesh;
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}
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/// <summary>
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/// Returns the destination slice index (for texture array) for a given view.
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/// </summary>
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/// <param name="viewIndex"> Index of XRView to retrieve the data from. </param>
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/// <returns> XR target slice index for the specified XRView. </returns>
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public int GetTextureArraySlice(int viewIndex = 0)
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{
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return m_Views[viewIndex].textureArraySlice;
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}
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/// <summary>
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/// Queue up render commands to enable single-pass techniques.
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/// Note: depending on the platform and settings, either single-pass instancing or the multiview extension will be used.
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/// </summary>
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/// <param name="cmd">CommandBuffer to modify</param>
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public void StartSinglePass(CommandBuffer cmd)
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{
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if (enabled)
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{
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if (singlePassEnabled)
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{
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if (viewCount <= TextureXR.slices)
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{
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if (SystemInfo.supportsMultiview)
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{
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cmd.EnableKeyword(SinglepassKeywords.STEREO_MULTIVIEW_ON);
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}
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else
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{
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cmd.EnableKeyword(SinglepassKeywords.STEREO_INSTANCING_ON);
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cmd.SetInstanceMultiplier((uint)viewCount);
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}
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}
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else
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{
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throw new NotImplementedException($"Invalid XR setup for single-pass, trying to render too many views! Max supported: {TextureXR.slices}");
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}
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}
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}
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}
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/// <summary>
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/// Queue up render commands to disable single-pass techniques.
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/// </summary>
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/// <param name="cmd">IRasterCommandBuffer compatible command buffer to modify (This can be a RasterCommandBuffer or an UnsafeCommandBuffer)</param>
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public void StartSinglePass(IRasterCommandBuffer cmd)
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{
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StartSinglePass((cmd as BaseCommandBuffer).m_WrappedCommandBuffer);
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}
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/// <summary>
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/// Queue up render commands to disable single-pass techniques.
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/// </summary>
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/// <param name="cmd">CommandBuffer to modify.</param>
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public void StopSinglePass(CommandBuffer cmd)
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{
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if (enabled)
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{
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if (singlePassEnabled)
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{
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if (SystemInfo.supportsMultiview)
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{
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cmd.DisableKeyword(SinglepassKeywords.STEREO_MULTIVIEW_ON);
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}
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else
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{
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cmd.DisableKeyword(SinglepassKeywords.STEREO_INSTANCING_ON);
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cmd.SetInstanceMultiplier(1);
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}
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}
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}
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}
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/// <summary>
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/// Queue up render commands to disable single-pass techniques.
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/// </summary>
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/// <param name="cmd">BaseCommandBuffer to modify</param>
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public void StopSinglePass(BaseCommandBuffer cmd)
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{
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StopSinglePass(cmd.m_WrappedCommandBuffer);
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}
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/// <summary>
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/// Returns true if the pass was setup with expected mesh and material.
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/// </summary>
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public bool hasValidOcclusionMesh { get => m_OcclusionMesh.hasValidOcclusionMesh; }
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/// <summary>
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/// Generate commands to render the occlusion mesh for this pass.
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/// In single-pass mode : the meshes for all views are combined into one mesh,
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/// where the corresponding view index is encoded into each vertex. The keyword
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/// "XR_OCCLUSION_MESH_COMBINED" is also enabled when rendering the combined mesh.
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/// </summary>
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/// <param name="cmd">CommandBuffer to modify</param>
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/// <param name="renderIntoTexture">Set to true when rendering into a render texture. Used for handling Unity yflip.</param>
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public void RenderOcclusionMesh(CommandBuffer cmd, bool renderIntoTexture = false)
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{
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if(occlusionMeshScale > 0)
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m_OcclusionMesh.RenderOcclusionMesh(cmd, occlusionMeshScale, renderIntoTexture);
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}
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|
|
/// <summary>
|
||
|
|
/// Generate commands to render the occlusion mesh for this pass.
|
||
|
|
/// In single-pass mode : the meshes for all views are combined into one mesh,
|
||
|
|
/// where the corresponding view index is encoded into each vertex. The keyword
|
||
|
|
/// "XR_OCCLUSION_MESH_COMBINED" is also enabled when rendering the combined mesh.
|
||
|
|
/// </summary>
|
||
|
|
/// <param name="cmd">RasterCommandBuffer to modify</param>
|
||
|
|
/// <param name="renderIntoTexture">Set to true when rendering into a render texture. Used for handling Unity yflip.</param>
|
||
|
|
public void RenderOcclusionMesh(RasterCommandBuffer cmd, bool renderIntoTexture = false)
|
||
|
|
{
|
||
|
|
if (occlusionMeshScale > 0)
|
||
|
|
m_OcclusionMesh.RenderOcclusionMesh(cmd.m_WrappedCommandBuffer, occlusionMeshScale, renderIntoTexture);
|
||
|
|
}
|
||
|
|
|
||
|
|
/// <summary>
|
||
|
|
/// Draw debug line for all XR views.
|
||
|
|
/// </summary>
|
||
|
|
public void RenderDebugXRViewsFrustum()
|
||
|
|
{
|
||
|
|
for(int i = 0; i < m_Views.Count; i++)
|
||
|
|
{
|
||
|
|
const float k_DebugVeiwsFrustumDepthZ = 10.0f;
|
||
|
|
var view = m_Views[i];
|
||
|
|
var corners = CoreUtils.CalculateViewSpaceCorners(view.projMatrix, k_DebugVeiwsFrustumDepthZ);
|
||
|
|
|
||
|
|
// Get world space camera pos
|
||
|
|
Vector3 worldSpaceCameraPos = -(view.viewMatrix).GetColumn(3);
|
||
|
|
for(int j = 0; j < 4; j++)
|
||
|
|
Debug.DrawLine(worldSpaceCameraPos, view.viewMatrix.MultiplyPoint(corners[j]), i == 0 ? Color.green : Color.red);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/// <summary>
|
||
|
|
/// Take a point that is center-relative (0.5, 0.5) and modify it to be placed relative to the view's center instead, respecting the asymmetric FOV (if it is used)
|
||
|
|
/// </summary>
|
||
|
|
/// <param name="center"> Center relative point for symmetric FOV. </param>
|
||
|
|
/// <returns> View center relative points. First view center is stored in x,y components and second view center is stored in z,w components. </returns>
|
||
|
|
public Vector4 ApplyXRViewCenterOffset(Vector2 center)
|
||
|
|
{
|
||
|
|
Vector4 result = Vector4.zero;
|
||
|
|
float centerDeltaX = 0.5f - center.x;
|
||
|
|
float centerDeltaY = 0.5f - center.y;
|
||
|
|
|
||
|
|
result.x = m_Views[0].eyeCenterUV.x - centerDeltaX;
|
||
|
|
result.y = m_Views[0].eyeCenterUV.y - centerDeltaY;
|
||
|
|
if (singlePassEnabled)
|
||
|
|
{
|
||
|
|
// With single-pass XR, we need to add the data for the 2nd view
|
||
|
|
result.z = m_Views[1].eyeCenterUV.x - centerDeltaX;
|
||
|
|
result.w = m_Views[1].eyeCenterUV.y - centerDeltaY;
|
||
|
|
}
|
||
|
|
|
||
|
|
return result;
|
||
|
|
}
|
||
|
|
|
||
|
|
internal void AssignView(int viewId, XRView xrView)
|
||
|
|
{
|
||
|
|
if (viewId < 0 || viewId >= m_Views.Count)
|
||
|
|
throw new ArgumentOutOfRangeException(nameof(viewId));
|
||
|
|
|
||
|
|
m_Views[viewId] = xrView;
|
||
|
|
}
|
||
|
|
|
||
|
|
internal void AssignCullingParams(int cullingPassId, ScriptableCullingParameters cullingParams)
|
||
|
|
{
|
||
|
|
// Disable legacy stereo culling path
|
||
|
|
cullingParams.cullingOptions &= ~CullingOptions.Stereo;
|
||
|
|
|
||
|
|
this.cullingPassId = cullingPassId;
|
||
|
|
this.cullingParams = cullingParams;
|
||
|
|
}
|
||
|
|
|
||
|
|
internal void UpdateCombinedOcclusionMesh()
|
||
|
|
{
|
||
|
|
m_OcclusionMesh.UpdateCombinedMesh();
|
||
|
|
}
|
||
|
|
|
||
|
|
/// <summary>
|
||
|
|
/// Initialize the base class fields.
|
||
|
|
/// </summary>
|
||
|
|
/// <param name="createInfo"> A descriptor used to create and initialize the XRPass. </param>
|
||
|
|
public void InitBase(XRPassCreateInfo createInfo)
|
||
|
|
{
|
||
|
|
m_Views.Clear();
|
||
|
|
copyDepth = createInfo.copyDepth;
|
||
|
|
multipassId = createInfo.multipassId;
|
||
|
|
AssignCullingParams(createInfo.cullingPassId, createInfo.cullingParameters);
|
||
|
|
renderTarget = new RenderTargetIdentifier(createInfo.renderTarget, 0, CubemapFace.Unknown, -1);
|
||
|
|
renderTargetDesc = createInfo.renderTargetDesc;
|
||
|
|
motionVectorRenderTarget = new RenderTargetIdentifier(createInfo.motionVectorRenderTarget, 0, CubemapFace.Unknown, -1);
|
||
|
|
motionVectorRenderTargetDesc = createInfo.motionVectorRenderTargetDesc;
|
||
|
|
hasMotionVectorPass = createInfo.hasMotionVectorPass;
|
||
|
|
m_OcclusionMesh.SetMaterial(createInfo.occlusionMeshMaterial);
|
||
|
|
occlusionMeshScale = createInfo.occlusionMeshScale;
|
||
|
|
foveatedRenderingInfo = createInfo.foveatedRenderingInfo;
|
||
|
|
}
|
||
|
|
|
||
|
|
internal void AddView(XRView xrView)
|
||
|
|
{
|
||
|
|
if (m_Views.Count < TextureXR.slices)
|
||
|
|
{
|
||
|
|
m_Views.Add(xrView);
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
throw new NotImplementedException($"Invalid XR setup for single-pass, trying to add too many views! Max supported: {TextureXR.slices}");
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|