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1049 行
46 KiB
1049 行
46 KiB
using System.Runtime.CompilerServices;
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using UnityEngine.Experimental.Rendering;
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namespace UnityEngine.Rendering.Universal
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{
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// TODO: xmldoc
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public interface IPostProcessComponent
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{
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bool IsActive();
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bool IsTileCompatible();
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}
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// TODO: TAA
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// TODO: Motion blur
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internal class PostProcessPass : ScriptableRenderPass
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{
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RenderTextureDescriptor m_Descriptor;
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RenderTargetHandle m_Source;
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RenderTargetHandle m_Destination;
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RenderTargetHandle m_Depth;
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RenderTargetHandle m_InternalLut;
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const string k_RenderPostProcessingTag = "Render PostProcessing Effects";
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const string k_RenderFinalPostProcessingTag = "Render Final PostProcessing Pass";
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MaterialLibrary m_Materials;
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PostProcessData m_Data;
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// Builtin effects settings
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DepthOfField m_DepthOfField;
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MotionBlur m_MotionBlur;
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PaniniProjection m_PaniniProjection;
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Bloom m_Bloom;
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LensDistortion m_LensDistortion;
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ChromaticAberration m_ChromaticAberration;
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Vignette m_Vignette;
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ColorLookup m_ColorLookup;
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ColorAdjustments m_ColorAdjustments;
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Tonemapping m_Tonemapping;
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FilmGrain m_FilmGrain;
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// Misc
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const int k_MaxPyramidSize = 16;
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readonly GraphicsFormat m_DefaultHDRFormat;
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bool m_UseRGBM;
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readonly GraphicsFormat m_GaussianCoCFormat;
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Matrix4x4 m_PrevViewProjM = Matrix4x4.identity;
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bool m_ResetHistory;
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int m_DitheringTextureIndex;
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RenderTargetIdentifier[] m_MRT2;
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Vector4[] m_BokehKernel;
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int m_BokehHash;
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bool m_IsStereo;
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// True when this is the very last pass in the pipeline
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bool m_IsFinalPass;
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public PostProcessPass(RenderPassEvent evt, PostProcessData data)
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{
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renderPassEvent = evt;
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m_Data = data;
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m_Materials = new MaterialLibrary(data);
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// Texture format pre-lookup
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if (SystemInfo.IsFormatSupported(GraphicsFormat.B10G11R11_UFloatPack32, FormatUsage.Linear | FormatUsage.Render))
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{
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m_DefaultHDRFormat = GraphicsFormat.B10G11R11_UFloatPack32;
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m_UseRGBM = false;
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}
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else
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{
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m_DefaultHDRFormat = QualitySettings.activeColorSpace == ColorSpace.Linear
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? GraphicsFormat.R8G8B8A8_SRGB
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: GraphicsFormat.R8G8B8A8_UNorm;
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m_UseRGBM = true;
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}
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if (SystemInfo.IsFormatSupported(GraphicsFormat.R16_UNorm, FormatUsage.Linear | FormatUsage.Render))
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m_GaussianCoCFormat = GraphicsFormat.R16_UNorm;
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else if (SystemInfo.IsFormatSupported(GraphicsFormat.R16_SFloat, FormatUsage.Linear | FormatUsage.Render))
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m_GaussianCoCFormat = GraphicsFormat.R16_SFloat;
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else // Expect CoC banding
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m_GaussianCoCFormat = GraphicsFormat.R8_UNorm;
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// Bloom pyramid shader ids - can't use a simple stackalloc in the bloom function as we
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// unfortunately need to allocate strings
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ShaderConstants._BloomMipUp = new int[k_MaxPyramidSize];
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ShaderConstants._BloomMipDown = new int[k_MaxPyramidSize];
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for (int i = 0; i < k_MaxPyramidSize; i++)
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{
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ShaderConstants._BloomMipUp[i] = Shader.PropertyToID("_BloomMipUp" + i);
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ShaderConstants._BloomMipDown[i] = Shader.PropertyToID("_BloomMipDown" + i);
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}
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m_MRT2 = new RenderTargetIdentifier[2];
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m_ResetHistory = true;
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}
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public void Setup(in RenderTextureDescriptor baseDescriptor, in RenderTargetHandle source, in RenderTargetHandle destination, in RenderTargetHandle depth, in RenderTargetHandle internalLut)
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{
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m_Descriptor = baseDescriptor;
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m_Source = source;
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m_Destination = destination;
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m_Depth = depth;
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m_InternalLut = internalLut;
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m_IsFinalPass = false;
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}
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public void SetupFinalPass(in RenderTargetHandle source)
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{
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m_Source = source;
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m_Destination = RenderTargetHandle.CameraTarget;
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m_IsFinalPass = true;
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}
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public override void Configure(CommandBuffer cmd, RenderTextureDescriptor cameraTextureDescriptor)
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{
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if (m_Destination == RenderTargetHandle.CameraTarget)
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return;
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var desc = cameraTextureDescriptor;
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desc.msaaSamples = 1;
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desc.depthBufferBits = 0;
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cmd.GetTemporaryRT(m_Destination.id, desc, FilterMode.Point);
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}
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public void ResetHistory()
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{
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m_ResetHistory = true;
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}
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public bool CanRunOnTile()
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{
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// Check builtin & user effects here
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return false;
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}
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/// <inheritdoc/>
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public override void Execute(ScriptableRenderContext context, ref RenderingData renderingData)
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{
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// Start by pre-fetching all builtin effect settings we need
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// Some of the color-grading settings are only used in the color grading lut pass
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var stack = VolumeManager.instance.stack;
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m_DepthOfField = stack.GetComponent<DepthOfField>();
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m_MotionBlur = stack.GetComponent<MotionBlur>();
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m_PaniniProjection = stack.GetComponent<PaniniProjection>();
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m_Bloom = stack.GetComponent<Bloom>();
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m_LensDistortion = stack.GetComponent<LensDistortion>();
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m_ChromaticAberration = stack.GetComponent<ChromaticAberration>();
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m_Vignette = stack.GetComponent<Vignette>();
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m_ColorLookup = stack.GetComponent<ColorLookup>();
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m_ColorAdjustments = stack.GetComponent<ColorAdjustments>();
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m_Tonemapping = stack.GetComponent<Tonemapping>();
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m_FilmGrain = stack.GetComponent<FilmGrain>();
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if (m_IsFinalPass)
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{
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var cmd = CommandBufferPool.Get(k_RenderFinalPostProcessingTag);
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RenderFinalPass(cmd, ref renderingData);
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context.ExecuteCommandBuffer(cmd);
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CommandBufferPool.Release(cmd);
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}
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else if (CanRunOnTile())
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{
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// TODO: Add a fast render path if only on-tile compatible effects are used and we're actually running on a platform that supports it
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// Note: we can still work on-tile if FXAA is enabled, it'd be part of the final pass
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}
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else
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{
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// Regular render path (not on-tile) - we do everything in a single command buffer as it
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// makes it easier to manage temporary targets' lifetime
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var cmd = CommandBufferPool.Get(k_RenderPostProcessingTag);
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Render(cmd, ref renderingData);
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context.ExecuteCommandBuffer(cmd);
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CommandBufferPool.Release(cmd);
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}
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m_ResetHistory = false;
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}
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RenderTextureDescriptor GetStereoCompatibleDescriptor()
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=> GetStereoCompatibleDescriptor(m_Descriptor.width, m_Descriptor.height, m_Descriptor.graphicsFormat);
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RenderTextureDescriptor GetStereoCompatibleDescriptor(int width, int height, GraphicsFormat format)
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{
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// Inherit the VR setup from the camera descriptor
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var desc = m_Descriptor;
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desc.depthBufferBits = 0;
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desc.msaaSamples = 1;
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desc.width = width;
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desc.height = height;
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desc.graphicsFormat = format;
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return desc;
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}
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void Render(CommandBuffer cmd, ref RenderingData renderingData)
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{
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ref var cameraData = ref renderingData.cameraData;
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m_IsStereo = renderingData.cameraData.isStereoEnabled;
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// Don't use these directly unless you have a good reason to, use GetSource() and
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// GetDestination() instead
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int source = m_Source.id;
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int destination = -1;
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// Utilities to simplify intermediate target management
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int GetSource() => source;
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int GetDestination()
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{
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if (destination == -1)
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{
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cmd.GetTemporaryRT(ShaderConstants._TempTarget, GetStereoCompatibleDescriptor(), FilterMode.Bilinear);
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destination = ShaderConstants._TempTarget;
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}
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return destination;
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}
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void Swap() => CoreUtils.Swap(ref source, ref destination);
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// Optional NaN killer before post-processing kicks in
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if (cameraData.isStopNaNEnabled)
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{
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using (new ProfilingSample(cmd, "Stop NaN"))
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{
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cmd.Blit(GetSource(), GetDestination(), m_Materials.stopNaN);
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Swap();
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}
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}
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// Anti-aliasing
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if (cameraData.antialiasing == AntialiasingMode.SubpixelMorphologicalAntiAliasing && SystemInfo.graphicsDeviceType != GraphicsDeviceType.OpenGLES2)
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{
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using (new ProfilingSample(cmd, "Sub-pixel Morphological Anti-aliasing"))
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{
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DoSubpixelMorphologicalAntialiasing(ref cameraData, cmd, GetSource(), GetDestination());
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Swap();
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}
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}
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// Depth of Field
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if (m_DepthOfField.IsActive() && !cameraData.isSceneViewCamera)
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{
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var markerName = m_DepthOfField.mode.value == DepthOfFieldMode.Gaussian
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? "Gaussian Depth of Field"
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: "Bokeh Depth of Field";
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using (new ProfilingSample(cmd, markerName))
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{
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DoDepthOfField(cameraData.camera, cmd, GetSource(), GetDestination());
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Swap();
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}
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}
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// Motion blur
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if (m_MotionBlur.IsActive() && !cameraData.isSceneViewCamera)
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{
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using (new ProfilingSample(cmd, "Motion Blur"))
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{
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DoMotionBlur(cameraData.camera, cmd, GetSource(), GetDestination());
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Swap();
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}
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}
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// Panini projection is done as a fullscreen pass after all depth-based effects are done
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// and before bloom kicks in
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if (m_PaniniProjection.IsActive() && !cameraData.isSceneViewCamera)
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{
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using (new ProfilingSample(cmd, "Panini Projection"))
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{
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DoPaniniProjection(cameraData.camera, cmd, GetSource(), GetDestination());
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Swap();
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}
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}
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// Combined post-processing stack
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using (new ProfilingSample(cmd, "Uber"))
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{
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// Reset uber keywords
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m_Materials.uber.shaderKeywords = null;
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// Bloom goes first
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bool bloomActive = m_Bloom.IsActive();
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if (bloomActive)
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{
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using (new ProfilingSample(cmd, "Bloom"))
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SetupBloom(cmd, GetSource(), m_Materials.uber);
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}
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// Setup other effects constants
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SetupLensDistortion(m_Materials.uber, cameraData.isSceneViewCamera);
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SetupChromaticAberration(m_Materials.uber);
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SetupVignette(m_Materials.uber);
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SetupColorGrading(cmd, ref renderingData, m_Materials.uber);
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// Only apply dithering & grain if we're the final pass
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SetupGrain(cameraData.camera, m_Materials.uber);
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SetupDithering(ref cameraData, m_Materials.uber);
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if (Display.main.requiresSrgbBlitToBackbuffer)
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m_Materials.uber.EnableKeyword(ShaderKeywordStrings.LinearToSRGBConversion);
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// Done with Uber, blit it
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cmd.SetGlobalTexture("_BlitTex", GetSource());
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if (m_IsStereo)
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{
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Blit(cmd, GetSource(), m_Destination.Identifier(), m_Materials.uber);
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}
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else
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{
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cmd.SetRenderTarget(m_Destination.Identifier());
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cmd.SetViewProjectionMatrices(Matrix4x4.identity, Matrix4x4.identity);
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cmd.SetViewport(cameraData.camera.pixelRect);
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cmd.DrawMesh(RenderingUtils.fullscreenMesh, Matrix4x4.identity, m_Materials.uber);
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cmd.SetViewProjectionMatrices(cameraData.camera.worldToCameraMatrix, cameraData.camera.projectionMatrix);
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}
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// Cleanup
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if (bloomActive)
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cmd.ReleaseTemporaryRT(ShaderConstants._BloomMipUp[0]);
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if (destination != -1)
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cmd.ReleaseTemporaryRT(ShaderConstants._TempTarget);
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}
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}
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#region Sub-pixel Morphological Anti-aliasing
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// TODO: XR isn't working with SMAA
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void DoSubpixelMorphologicalAntialiasing(ref CameraData cameraData, CommandBuffer cmd, int source, int destination)
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{
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var camera = cameraData.camera;
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var material = m_Materials.subpixelMorphologicalAntialiasing;
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const int kStencilBit = 64;
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// Globals
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material.SetVector(ShaderConstants._Metrics, new Vector4(1f / m_Descriptor.width, 1f / m_Descriptor.height, m_Descriptor.width, m_Descriptor.height));
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material.SetTexture(ShaderConstants._AreaTexture, m_Data.textures.smaaAreaTex);
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material.SetTexture(ShaderConstants._SearchTexture, m_Data.textures.smaaSearchTex);
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material.SetInt(ShaderConstants._StencilRef, kStencilBit);
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material.SetInt(ShaderConstants._StencilMask, kStencilBit);
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// Quality presets
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material.shaderKeywords = null;
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switch (cameraData.antialiasingQuality)
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{
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case AntialiasingQuality.Low: material.EnableKeyword(ShaderKeywordStrings.SmaaLow);
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break;
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case AntialiasingQuality.Medium: material.EnableKeyword(ShaderKeywordStrings.SmaaMedium);
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break;
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case AntialiasingQuality.High: material.EnableKeyword(ShaderKeywordStrings.SmaaHigh);
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break;
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}
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// Intermediate targets
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cmd.GetTemporaryRT(ShaderConstants._EdgeTexture, m_Descriptor.width, m_Descriptor.height, 0, FilterMode.Point, GraphicsFormat.R8G8B8A8_UNorm);
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cmd.GetTemporaryRT(ShaderConstants._BlendTexture, m_Descriptor.width, m_Descriptor.height, 0, FilterMode.Point, GraphicsFormat.R8G8B8A8_UNorm);
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// Prepare for manual blit
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cmd.SetViewProjectionMatrices(Matrix4x4.identity, Matrix4x4.identity);
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cmd.SetViewport(camera.pixelRect);
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// Pass 1: Edge detection
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cmd.SetRenderTarget(ShaderConstants._EdgeTexture, m_Depth.Identifier());
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cmd.ClearRenderTarget(true, true, Color.clear); // TODO: Explicitly clearing depth/stencil here but we shouldn't have to, FIXME /!\
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cmd.SetGlobalTexture(ShaderConstants._ColorTexture, source);
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cmd.DrawMesh(RenderingUtils.fullscreenMesh, Matrix4x4.identity, material, 0, 0);
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// Pass 2: Blend weights
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cmd.SetRenderTarget(ShaderConstants._BlendTexture, m_Depth.Identifier());
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cmd.ClearRenderTarget(false, true, Color.clear);
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cmd.SetGlobalTexture(ShaderConstants._ColorTexture, ShaderConstants._EdgeTexture);
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cmd.DrawMesh(RenderingUtils.fullscreenMesh, Matrix4x4.identity, material, 0, 1);
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// Pass 3: Neighborhood blending
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cmd.SetRenderTarget(destination);
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cmd.SetGlobalTexture(ShaderConstants._ColorTexture, source);
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cmd.SetGlobalTexture(ShaderConstants._BlendTexture, ShaderConstants._BlendTexture);
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cmd.DrawMesh(RenderingUtils.fullscreenMesh, Matrix4x4.identity, material, 0, 2);
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// Cleanup
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cmd.ReleaseTemporaryRT(ShaderConstants._EdgeTexture);
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cmd.ReleaseTemporaryRT(ShaderConstants._BlendTexture);
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cmd.SetViewProjectionMatrices(camera.worldToCameraMatrix, camera.projectionMatrix);
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}
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#endregion
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#region Depth Of Field
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// TODO: CoC reprojection once TAA gets in LW
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// TODO: Proper LDR/gamma support
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void DoDepthOfField(Camera camera, CommandBuffer cmd, int source, int destination)
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{
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if (m_DepthOfField.mode.value == DepthOfFieldMode.Gaussian)
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DoGaussianDepthOfField(camera, cmd, source, destination);
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else if (m_DepthOfField.mode.value == DepthOfFieldMode.Bokeh)
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DoBokehDepthOfField(cmd, source, destination);
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}
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// TODO: XR isn't working with Gaussian DOF
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void DoGaussianDepthOfField(Camera camera, CommandBuffer cmd, int source, int destination)
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{
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var material = m_Materials.gaussianDepthOfField;
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int wh = m_Descriptor.width / 2;
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int hh = m_Descriptor.height / 2;
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float farStart = m_DepthOfField.gaussianStart.value;
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float farEnd = Mathf.Max(farStart, m_DepthOfField.gaussianEnd.value);
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// Assumes a radius of 1 is 1 at 1080p
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// Past a certain radius our gaussian kernel will look very bad so we'll clamp it for
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// very high resolutions (4K+).
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float maxRadius = m_DepthOfField.gaussianMaxRadius.value * (wh / 1080f);
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maxRadius = Mathf.Min(maxRadius, 2f);
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CoreUtils.SetKeyword(material, ShaderKeywordStrings.HighQualitySampling, m_DepthOfField.highQualitySampling.value);
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material.SetVector(ShaderConstants._CoCParams, new Vector3(farStart, farEnd, maxRadius));
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// Temporary textures
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cmd.GetTemporaryRT(ShaderConstants._FullCoCTexture, GetStereoCompatibleDescriptor(m_Descriptor.width, m_Descriptor.height, m_GaussianCoCFormat), FilterMode.Bilinear);
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cmd.GetTemporaryRT(ShaderConstants._HalfCoCTexture, GetStereoCompatibleDescriptor(wh, hh, m_GaussianCoCFormat), FilterMode.Bilinear);
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cmd.GetTemporaryRT(ShaderConstants._PingTexture, GetStereoCompatibleDescriptor(wh, hh, m_DefaultHDRFormat), FilterMode.Bilinear);
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cmd.GetTemporaryRT(ShaderConstants._PongTexture, GetStereoCompatibleDescriptor(wh, hh, m_DefaultHDRFormat), FilterMode.Bilinear);
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// Compute CoC
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cmd.Blit(source, ShaderConstants._FullCoCTexture, material, 0);
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// Downscale & prefilter color + coc
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m_MRT2[0] = ShaderConstants._HalfCoCTexture;
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m_MRT2[1] = ShaderConstants._PingTexture;
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cmd.SetViewProjectionMatrices(Matrix4x4.identity, Matrix4x4.identity);
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cmd.SetViewport(camera.pixelRect);
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cmd.SetGlobalTexture(ShaderConstants._ColorTexture, source);
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cmd.SetGlobalTexture(ShaderConstants._FullCoCTexture, ShaderConstants._FullCoCTexture);
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cmd.SetRenderTarget(m_MRT2, ShaderConstants._HalfCoCTexture);
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cmd.DrawMesh(RenderingUtils.fullscreenMesh, Matrix4x4.identity, material, 0, 1);
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cmd.SetViewProjectionMatrices(camera.worldToCameraMatrix, camera.projectionMatrix);
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// Blur
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cmd.SetGlobalTexture(ShaderConstants._HalfCoCTexture, ShaderConstants._HalfCoCTexture);
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cmd.Blit(ShaderConstants._PingTexture, ShaderConstants._PongTexture, material, 2);
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cmd.Blit(ShaderConstants._PongTexture, ShaderConstants._PingTexture, material, 3);
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// Composite
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cmd.SetGlobalTexture(ShaderConstants._ColorTexture, ShaderConstants._PingTexture);
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cmd.SetGlobalTexture(ShaderConstants._FullCoCTexture, ShaderConstants._FullCoCTexture);
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cmd.Blit(source, destination, material, 4);
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// Cleanup
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cmd.ReleaseTemporaryRT(ShaderConstants._FullCoCTexture);
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cmd.ReleaseTemporaryRT(ShaderConstants._HalfCoCTexture);
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cmd.ReleaseTemporaryRT(ShaderConstants._PingTexture);
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cmd.ReleaseTemporaryRT(ShaderConstants._PongTexture);
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}
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void PrepareBokehKernel()
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{
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const int kRings = 4;
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const int kPointsPerRing = 7;
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// Check the existing array
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if (m_BokehKernel == null)
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m_BokehKernel = new Vector4[42];
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// Fill in sample points (concentric circles transformed to rotated N-Gon)
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int idx = 0;
|
|
float bladeCount = m_DepthOfField.bladeCount.value;
|
|
float curvature = 1f - m_DepthOfField.bladeCurvature.value;
|
|
float rotation = m_DepthOfField.bladeRotation.value * Mathf.Deg2Rad;
|
|
const float PI = Mathf.PI;
|
|
const float TWO_PI = Mathf.PI * 2f;
|
|
|
|
for (int ring = 1; ring < kRings; ring++)
|
|
{
|
|
float bias = 1f / kPointsPerRing;
|
|
float radius = (ring + bias) / (kRings - 1f + bias);
|
|
int points = ring * kPointsPerRing;
|
|
|
|
for (int point = 0; point < points; point++)
|
|
{
|
|
// Angle on ring
|
|
float phi = 2f * PI * point / points;
|
|
|
|
// Transform to rotated N-Gon
|
|
// Adapted from "CryEngine 3 Graphics Gems" [Sousa13]
|
|
float nt = Mathf.Cos(PI / bladeCount);
|
|
float dt = Mathf.Cos(phi - (TWO_PI / bladeCount) * Mathf.Floor((bladeCount * phi + Mathf.PI) / TWO_PI));
|
|
float r = radius * Mathf.Pow(nt / dt, curvature);
|
|
float u = r * Mathf.Cos(phi - rotation);
|
|
float v = r * Mathf.Sin(phi - rotation);
|
|
|
|
m_BokehKernel[idx] = new Vector4(u, v);
|
|
idx++;
|
|
}
|
|
}
|
|
}
|
|
|
|
[MethodImpl(MethodImplOptions.AggressiveInlining)]
|
|
static float GetMaxBokehRadiusInPixels(float viewportHeight)
|
|
{
|
|
// Estimate the maximum radius of bokeh (empirically derived from the ring count)
|
|
const float kRadiusInPixels = 14f;
|
|
return Mathf.Min(0.05f, kRadiusInPixels / viewportHeight);
|
|
}
|
|
|
|
void DoBokehDepthOfField(CommandBuffer cmd, int source, int destination)
|
|
{
|
|
var material = m_Materials.bokehDepthOfField;
|
|
int wh = m_Descriptor.width / 2;
|
|
int hh = m_Descriptor.height / 2;
|
|
|
|
// "A Lens and Aperture Camera Model for Synthetic Image Generation" [Potmesil81]
|
|
float F = m_DepthOfField.focalLength.value / 1000f;
|
|
float A = m_DepthOfField.focalLength.value / m_DepthOfField.aperture.value;
|
|
float P = m_DepthOfField.focusDistance.value;
|
|
float maxCoC = (A * F) / (P - F);
|
|
float maxRadius = GetMaxBokehRadiusInPixels(m_Descriptor.height);
|
|
float rcpAspect = 1f / (wh / (float)hh);
|
|
|
|
cmd.SetGlobalVector(ShaderConstants._CoCParams, new Vector4(P, maxCoC, maxRadius, rcpAspect));
|
|
|
|
// Prepare the bokeh kernel constant buffer
|
|
int hash = m_DepthOfField.GetHashCode(); // TODO: GC fix
|
|
if (hash != m_BokehHash)
|
|
{
|
|
m_BokehHash = hash;
|
|
PrepareBokehKernel();
|
|
}
|
|
|
|
cmd.SetGlobalVectorArray(ShaderConstants._BokehKernel, m_BokehKernel);
|
|
|
|
// Temporary textures
|
|
cmd.GetTemporaryRT(ShaderConstants._FullCoCTexture, GetStereoCompatibleDescriptor(m_Descriptor.width, m_Descriptor.height, GraphicsFormat.R8_UNorm), FilterMode.Bilinear);
|
|
cmd.GetTemporaryRT(ShaderConstants._PingTexture, GetStereoCompatibleDescriptor(wh, hh, GraphicsFormat.R16G16B16A16_SFloat), FilterMode.Bilinear);
|
|
cmd.GetTemporaryRT(ShaderConstants._PongTexture, GetStereoCompatibleDescriptor(wh, hh, GraphicsFormat.R16G16B16A16_SFloat), FilterMode.Bilinear);
|
|
|
|
// Compute CoC
|
|
cmd.Blit(source, ShaderConstants._FullCoCTexture, material, 0);
|
|
cmd.SetGlobalTexture(ShaderConstants._FullCoCTexture, ShaderConstants._FullCoCTexture);
|
|
|
|
// Downscale & prefilter color + coc
|
|
cmd.Blit(source, ShaderConstants._PingTexture, material, 1);
|
|
|
|
// Bokeh blur
|
|
cmd.Blit(ShaderConstants._PingTexture, ShaderConstants._PongTexture, material, 2);
|
|
|
|
// Post-filtering
|
|
cmd.Blit(ShaderConstants._PongTexture, ShaderConstants._PingTexture, material, 3);
|
|
|
|
// Composite
|
|
cmd.SetGlobalTexture(ShaderConstants._DofTexture, ShaderConstants._PingTexture);
|
|
cmd.Blit(source, destination, material, 4);
|
|
|
|
// Cleanup
|
|
cmd.ReleaseTemporaryRT(ShaderConstants._FullCoCTexture);
|
|
cmd.ReleaseTemporaryRT(ShaderConstants._PingTexture);
|
|
cmd.ReleaseTemporaryRT(ShaderConstants._PongTexture);
|
|
}
|
|
|
|
#endregion
|
|
|
|
#region Motion Blur
|
|
|
|
void DoMotionBlur(Camera camera, CommandBuffer cmd, int source, int destination)
|
|
{
|
|
var material = m_Materials.cameraMotionBlur;
|
|
|
|
// This is needed because Blit will reset viewproj matrices to identity and LW currently
|
|
// relies on SetupCameraProperties instead of handling its own matrices.
|
|
// TODO: We need get rid of SetupCameraProperties and setup camera matrices in Universal
|
|
var proj = camera.nonJitteredProjectionMatrix;
|
|
var view = camera.worldToCameraMatrix;
|
|
var viewProj = proj * view;
|
|
|
|
material.SetMatrix("_ViewProjM", viewProj);
|
|
|
|
if (m_ResetHistory)
|
|
material.SetMatrix("_PrevViewProjM", viewProj);
|
|
else
|
|
material.SetMatrix("_PrevViewProjM", m_PrevViewProjM);
|
|
|
|
material.SetFloat("_Intensity", m_MotionBlur.intensity.value);
|
|
material.SetFloat("_Clamp", m_MotionBlur.clamp.value);
|
|
cmd.Blit(source, destination, material, (int)m_MotionBlur.quality.value);
|
|
|
|
m_PrevViewProjM = viewProj;
|
|
}
|
|
|
|
#endregion
|
|
|
|
#region Panini Projection
|
|
|
|
// Back-ported & adapted from the work of the Stockholm demo team - thanks Lasse!
|
|
void DoPaniniProjection(Camera camera, CommandBuffer cmd, int source, int destination)
|
|
{
|
|
float distance = m_PaniniProjection.distance.value;
|
|
var viewExtents = CalcViewExtents(camera);
|
|
var cropExtents = CalcCropExtents(camera, distance);
|
|
|
|
float scaleX = cropExtents.x / viewExtents.x;
|
|
float scaleY = cropExtents.y / viewExtents.y;
|
|
float scaleF = Mathf.Min(scaleX, scaleY);
|
|
|
|
float paniniD = distance;
|
|
float paniniS = Mathf.Lerp(1f, Mathf.Clamp01(scaleF), m_PaniniProjection.cropToFit.value);
|
|
|
|
var material = m_Materials.paniniProjection;
|
|
material.SetVector(ShaderConstants._Params, new Vector4(viewExtents.x, viewExtents.y, paniniD, paniniS));
|
|
material.EnableKeyword(
|
|
1f - Mathf.Abs(paniniD) > float.Epsilon
|
|
? ShaderKeywordStrings.PaniniGeneric : ShaderKeywordStrings.PaniniUnitDistance
|
|
);
|
|
|
|
cmd.Blit(source, destination, material);
|
|
}
|
|
|
|
Vector2 CalcViewExtents(Camera camera)
|
|
{
|
|
float fovY = camera.fieldOfView * Mathf.Deg2Rad;
|
|
float aspect = m_Descriptor.width / (float)m_Descriptor.height;
|
|
|
|
float viewExtY = Mathf.Tan(0.5f * fovY);
|
|
float viewExtX = aspect * viewExtY;
|
|
|
|
return new Vector2(viewExtX, viewExtY);
|
|
}
|
|
|
|
Vector2 CalcCropExtents(Camera camera, float d)
|
|
{
|
|
// given
|
|
// S----------- E--X-------
|
|
// | ` ~. /,´
|
|
// |-- --- Q
|
|
// | ,/ `
|
|
// 1 | ,´/ `
|
|
// | ,´ / ´
|
|
// | ,´ / ´
|
|
// |,` / ,
|
|
// O /
|
|
// | / ,
|
|
// d | /
|
|
// | / ,
|
|
// |/ .
|
|
// P
|
|
// | ´
|
|
// | , ´
|
|
// +- ´
|
|
//
|
|
// have X
|
|
// want to find E
|
|
|
|
float viewDist = 1f + d;
|
|
|
|
var projPos = CalcViewExtents(camera);
|
|
var projHyp = Mathf.Sqrt(projPos.x * projPos.x + 1f);
|
|
|
|
float cylDistMinusD = 1f / projHyp;
|
|
float cylDist = cylDistMinusD + d;
|
|
var cylPos = projPos * cylDistMinusD;
|
|
|
|
return cylPos * (viewDist / cylDist);
|
|
}
|
|
|
|
#endregion
|
|
|
|
#region Bloom
|
|
|
|
void SetupBloom(CommandBuffer cmd, int source, Material uberMaterial)
|
|
{
|
|
// Start at half-res
|
|
int tw = m_Descriptor.width >> 1;
|
|
int th = m_Descriptor.height >> 1;
|
|
|
|
// Determine the iteration count
|
|
int maxSize = Mathf.Max(tw, th);
|
|
int iterations = Mathf.FloorToInt(Mathf.Log(maxSize, 2f) - 1);
|
|
int mipCount = Mathf.Clamp(iterations, 1, k_MaxPyramidSize);
|
|
|
|
// Pre-filtering parameters
|
|
float clamp = m_Bloom.clamp.value;
|
|
float threshold = Mathf.GammaToLinearSpace(m_Bloom.threshold.value);
|
|
float thresholdKnee = threshold * 0.5f; // Hardcoded soft knee
|
|
|
|
// Material setup
|
|
float scatter = Mathf.Lerp(0.05f, 0.95f, m_Bloom.scatter.value);
|
|
var bloomMaterial = m_Materials.bloom;
|
|
bloomMaterial.SetVector(ShaderConstants._Params, new Vector4(scatter, clamp, threshold, thresholdKnee));
|
|
CoreUtils.SetKeyword(bloomMaterial, ShaderKeywordStrings.BloomHQ, m_Bloom.highQualityFiltering.value);
|
|
CoreUtils.SetKeyword(bloomMaterial, ShaderKeywordStrings.UseRGBM, m_UseRGBM);
|
|
|
|
// Prefilter
|
|
var desc = GetStereoCompatibleDescriptor(tw, th, m_DefaultHDRFormat);
|
|
cmd.GetTemporaryRT(ShaderConstants._BloomMipDown[0], desc, FilterMode.Bilinear);
|
|
cmd.GetTemporaryRT(ShaderConstants._BloomMipUp[0], desc, FilterMode.Bilinear);
|
|
cmd.Blit(source, ShaderConstants._BloomMipDown[0], bloomMaterial, 0);
|
|
|
|
// Downsample - gaussian pyramid
|
|
int lastDown = ShaderConstants._BloomMipDown[0];
|
|
for (int i = 1; i < mipCount; i++)
|
|
{
|
|
tw = Mathf.Max(1, tw >> 1);
|
|
th = Mathf.Max(1, th >> 1);
|
|
int mipDown = ShaderConstants._BloomMipDown[i];
|
|
int mipUp = ShaderConstants._BloomMipUp[i];
|
|
|
|
desc.width = tw;
|
|
desc.height = th;
|
|
|
|
cmd.GetTemporaryRT(mipDown, desc, FilterMode.Bilinear);
|
|
cmd.GetTemporaryRT(mipUp, desc, FilterMode.Bilinear);
|
|
|
|
// Classic two pass gaussian blur - use mipUp as a temporary target
|
|
// First pass does 2x downsampling + 9-tap gaussian
|
|
// Second pass does 9-tap gaussian using a 5-tap filter + bilinear filtering
|
|
cmd.Blit(lastDown, mipUp, bloomMaterial, 1);
|
|
cmd.Blit(mipUp, mipDown, bloomMaterial, 2);
|
|
lastDown = mipDown;
|
|
}
|
|
|
|
// Upsample (bilinear by default, HQ filtering does bicubic instead
|
|
for (int i = mipCount - 2; i >= 0; i--)
|
|
{
|
|
int lowMip = (i == mipCount - 2) ? ShaderConstants._BloomMipDown[i + 1] : ShaderConstants._BloomMipUp[i + 1];
|
|
int highMip = ShaderConstants._BloomMipDown[i];
|
|
int dst = ShaderConstants._BloomMipUp[i];
|
|
|
|
cmd.SetGlobalTexture(ShaderConstants._MainTexLowMip, lowMip);
|
|
cmd.Blit(highMip, dst, bloomMaterial, 3);
|
|
}
|
|
|
|
// Cleanup
|
|
for (int i = 0; i < mipCount; i++)
|
|
{
|
|
cmd.ReleaseTemporaryRT(ShaderConstants._BloomMipDown[i]);
|
|
if (i > 0) cmd.ReleaseTemporaryRT(ShaderConstants._BloomMipUp[i]);
|
|
}
|
|
|
|
// Setup bloom on uber
|
|
var tint = m_Bloom.tint.value.linear;
|
|
var luma = ColorUtils.Luminance(tint);
|
|
tint = luma > 0f ? tint * (1f / luma) : Color.white;
|
|
|
|
var bloomParams = new Vector4(m_Bloom.intensity.value, tint.r, tint.g, tint.b);
|
|
uberMaterial.SetVector(ShaderConstants._Bloom_Params, bloomParams);
|
|
uberMaterial.SetFloat(ShaderConstants._Bloom_RGBM, m_UseRGBM ? 1f : 0f);
|
|
|
|
cmd.SetGlobalTexture(ShaderConstants._Bloom_Texture, ShaderConstants._BloomMipUp[0]);
|
|
|
|
// Setup lens dirtiness on uber
|
|
// Keep the aspect ratio correct & center the dirt texture, we don't want it to be
|
|
// stretched or squashed
|
|
var dirtTexture = m_Bloom.dirtTexture.value == null ? Texture2D.blackTexture : m_Bloom.dirtTexture.value;
|
|
float dirtRatio = dirtTexture.width / (float)dirtTexture.height;
|
|
float screenRatio = m_Descriptor.width / (float)m_Descriptor.height;
|
|
var dirtScaleOffset = new Vector4(1f, 1f, 0f, 0f);
|
|
float dirtIntensity = m_Bloom.dirtIntensity.value;
|
|
|
|
if (dirtRatio > screenRatio)
|
|
{
|
|
dirtScaleOffset.x = screenRatio / dirtRatio;
|
|
dirtScaleOffset.z = (1f - dirtScaleOffset.x) * 0.5f;
|
|
}
|
|
else if (screenRatio > dirtRatio)
|
|
{
|
|
dirtScaleOffset.y = dirtRatio / screenRatio;
|
|
dirtScaleOffset.w = (1f - dirtScaleOffset.y) * 0.5f;
|
|
}
|
|
|
|
uberMaterial.SetVector(ShaderConstants._LensDirt_Params, dirtScaleOffset);
|
|
uberMaterial.SetFloat(ShaderConstants._LensDirt_Intensity, dirtIntensity);
|
|
uberMaterial.SetTexture(ShaderConstants._LensDirt_Texture, dirtTexture);
|
|
|
|
// Keyword setup - a bit convoluted as we're trying to save some variants in Uber...
|
|
if (m_Bloom.highQualityFiltering.value)
|
|
uberMaterial.EnableKeyword(dirtIntensity > 0f ? ShaderKeywordStrings.BloomHQDirt : ShaderKeywordStrings.BloomHQ);
|
|
else
|
|
uberMaterial.EnableKeyword(dirtIntensity > 0f ? ShaderKeywordStrings.BloomLQDirt : ShaderKeywordStrings.BloomLQ);
|
|
}
|
|
|
|
#endregion
|
|
|
|
#region Lens Distortion
|
|
|
|
void SetupLensDistortion(Material material, bool isSceneView)
|
|
{
|
|
float amount = 1.6f * Mathf.Max(Mathf.Abs(m_LensDistortion.intensity.value * 100f), 1f);
|
|
float theta = Mathf.Deg2Rad * Mathf.Min(160f, amount);
|
|
float sigma = 2f * Mathf.Tan(theta * 0.5f);
|
|
var center = m_LensDistortion.center.value * 2f - Vector2.one;
|
|
var p1 = new Vector4(
|
|
center.x,
|
|
center.y,
|
|
Mathf.Max(m_LensDistortion.xMultiplier.value, 1e-4f),
|
|
Mathf.Max(m_LensDistortion.yMultiplier.value, 1e-4f)
|
|
);
|
|
var p2 = new Vector4(
|
|
m_LensDistortion.intensity.value >= 0f ? theta : 1f / theta,
|
|
sigma,
|
|
1f / m_LensDistortion.scale.value,
|
|
m_LensDistortion.intensity.value * 100f
|
|
);
|
|
|
|
material.SetVector(ShaderConstants._Distortion_Params1, p1);
|
|
material.SetVector(ShaderConstants._Distortion_Params2, p2);
|
|
|
|
if (m_LensDistortion.IsActive() && !isSceneView)
|
|
material.EnableKeyword(ShaderKeywordStrings.Distortion);
|
|
}
|
|
|
|
#endregion
|
|
|
|
#region Chromatic Aberration
|
|
|
|
void SetupChromaticAberration(Material material)
|
|
{
|
|
material.SetFloat(ShaderConstants._Chroma_Params, m_ChromaticAberration.intensity.value * 0.05f);
|
|
|
|
if (m_ChromaticAberration.IsActive())
|
|
material.EnableKeyword(ShaderKeywordStrings.ChromaticAberration);
|
|
}
|
|
|
|
#endregion
|
|
|
|
#region Vignette
|
|
|
|
void SetupVignette(Material material)
|
|
{
|
|
var color = m_Vignette.color.value;
|
|
var center = m_Vignette.center.value;
|
|
|
|
var v1 = new Vector4(
|
|
color.r, color.g, color.b,
|
|
m_Vignette.rounded.value ? m_Descriptor.width / (float)m_Descriptor.height : 1f
|
|
);
|
|
var v2 = new Vector4(
|
|
center.x, center.y,
|
|
m_Vignette.intensity.value * 3f,
|
|
m_Vignette.smoothness.value * 5f
|
|
);
|
|
|
|
material.SetVector(ShaderConstants._Vignette_Params1, v1);
|
|
material.SetVector(ShaderConstants._Vignette_Params2, v2);
|
|
}
|
|
|
|
#endregion
|
|
|
|
#region Color Grading
|
|
|
|
void SetupColorGrading(CommandBuffer cmd, ref RenderingData renderingData, Material material)
|
|
{
|
|
ref var postProcessingData = ref renderingData.postProcessingData;
|
|
bool hdr = postProcessingData.gradingMode == ColorGradingMode.HighDynamicRange;
|
|
int lutHeight = postProcessingData.lutSize;
|
|
int lutWidth = lutHeight * lutHeight;
|
|
|
|
// Source material setup
|
|
float postExposureLinear = Mathf.Pow(2f, m_ColorAdjustments.postExposure.value);
|
|
cmd.SetGlobalTexture(ShaderConstants._InternalLut, m_InternalLut.Identifier());
|
|
material.SetVector(ShaderConstants._Lut_Params, new Vector4(1f / lutWidth, 1f / lutHeight, lutHeight - 1f, postExposureLinear));
|
|
material.SetTexture(ShaderConstants._UserLut, m_ColorLookup.texture.value);
|
|
material.SetVector(ShaderConstants._UserLut_Params, !m_ColorLookup.IsActive()
|
|
? Vector4.zero
|
|
: new Vector4(1f / m_ColorLookup.texture.value.width,
|
|
1f / m_ColorLookup.texture.value.height,
|
|
m_ColorLookup.texture.value.height - 1f,
|
|
m_ColorLookup.contribution.value)
|
|
);
|
|
|
|
if (hdr)
|
|
{
|
|
material.EnableKeyword(ShaderKeywordStrings.HDRGrading);
|
|
}
|
|
else
|
|
{
|
|
switch (m_Tonemapping.mode.value)
|
|
{
|
|
case TonemappingMode.Neutral: material.EnableKeyword(ShaderKeywordStrings.TonemapNeutral); break;
|
|
case TonemappingMode.ACES: material.EnableKeyword(ShaderKeywordStrings.TonemapACES); break;
|
|
default: break; // None
|
|
}
|
|
}
|
|
}
|
|
|
|
#endregion
|
|
|
|
#region Film Grain
|
|
|
|
void SetupGrain(Camera camera, Material material)
|
|
{
|
|
if (m_Destination == RenderTargetHandle.CameraTarget && m_FilmGrain.IsActive())
|
|
{
|
|
material.EnableKeyword(ShaderKeywordStrings.FilmGrain);
|
|
PostProcessUtils.ConfigureFilmGrain(
|
|
m_Data,
|
|
m_FilmGrain,
|
|
camera,
|
|
material
|
|
);
|
|
}
|
|
}
|
|
|
|
#endregion
|
|
|
|
#region 8-bit Dithering
|
|
|
|
void SetupDithering(ref CameraData cameraData, Material material)
|
|
{
|
|
if (m_Destination == RenderTargetHandle.CameraTarget && cameraData.isDitheringEnabled)
|
|
{
|
|
material.EnableKeyword(ShaderKeywordStrings.Dithering);
|
|
m_DitheringTextureIndex = PostProcessUtils.ConfigureDithering(
|
|
m_Data,
|
|
m_DitheringTextureIndex,
|
|
cameraData.camera,
|
|
material
|
|
);
|
|
}
|
|
}
|
|
|
|
#endregion
|
|
|
|
#region Final pass
|
|
|
|
void RenderFinalPass(CommandBuffer cmd, ref RenderingData renderingData)
|
|
{
|
|
ref var cameraData = ref renderingData.cameraData;
|
|
var material = m_Materials.finalPass;
|
|
material.shaderKeywords = null;
|
|
|
|
// FXAA setup
|
|
if (cameraData.antialiasing == AntialiasingMode.FastApproximateAntialiasing)
|
|
material.EnableKeyword(ShaderKeywordStrings.Fxaa);
|
|
|
|
SetupGrain(cameraData.camera, material);
|
|
SetupDithering(ref cameraData, material);
|
|
|
|
if (Display.main.requiresSrgbBlitToBackbuffer)
|
|
material.EnableKeyword(ShaderKeywordStrings.LinearToSRGBConversion);
|
|
|
|
cmd.SetGlobalTexture("_BlitTex", m_Source.Identifier());
|
|
|
|
if (cameraData.isStereoEnabled)
|
|
{
|
|
Blit(cmd, m_Source.Identifier(), m_Destination.Identifier(), material);
|
|
}
|
|
else
|
|
{
|
|
cmd.SetRenderTarget(m_Destination.Identifier());
|
|
cmd.SetViewProjectionMatrices(Matrix4x4.identity, Matrix4x4.identity);
|
|
cmd.SetViewport(cameraData.camera.pixelRect);
|
|
cmd.DrawMesh(RenderingUtils.fullscreenMesh, Matrix4x4.identity, material);
|
|
cmd.SetViewProjectionMatrices(cameraData.camera.worldToCameraMatrix, cameraData.camera.projectionMatrix);
|
|
}
|
|
}
|
|
|
|
#endregion
|
|
|
|
#region Internal utilities
|
|
|
|
class MaterialLibrary
|
|
{
|
|
public readonly Material stopNaN;
|
|
public readonly Material subpixelMorphologicalAntialiasing;
|
|
public readonly Material gaussianDepthOfField;
|
|
public readonly Material bokehDepthOfField;
|
|
public readonly Material cameraMotionBlur;
|
|
public readonly Material paniniProjection;
|
|
public readonly Material bloom;
|
|
public readonly Material uber;
|
|
public readonly Material finalPass;
|
|
|
|
public MaterialLibrary(PostProcessData data)
|
|
{
|
|
stopNaN = Load(data.shaders.stopNanPS);
|
|
subpixelMorphologicalAntialiasing = Load(data.shaders.subpixelMorphologicalAntialiasingPS);
|
|
gaussianDepthOfField = Load(data.shaders.gaussianDepthOfFieldPS);
|
|
bokehDepthOfField = Load(data.shaders.bokehDepthOfFieldPS);
|
|
cameraMotionBlur = Load(data.shaders.cameraMotionBlurPS);
|
|
paniniProjection = Load(data.shaders.paniniProjectionPS);
|
|
bloom = Load(data.shaders.bloomPS);
|
|
uber = Load(data.shaders.uberPostPS);
|
|
finalPass = Load(data.shaders.finalPostPassPS);
|
|
}
|
|
|
|
Material Load(Shader shader)
|
|
{
|
|
if (shader == null)
|
|
{
|
|
Debug.LogErrorFormat($"Missing shader. {GetType().DeclaringType.Name} render pass will not execute. Check for missing reference in the renderer resources.");
|
|
return null;
|
|
}
|
|
|
|
return CoreUtils.CreateEngineMaterial(shader);
|
|
}
|
|
}
|
|
|
|
// Precomputed shader ids to same some CPU cycles (mostly affects mobile)
|
|
static class ShaderConstants
|
|
{
|
|
public static readonly int _TempTarget = Shader.PropertyToID("_TempTarget");
|
|
|
|
public static readonly int _StencilRef = Shader.PropertyToID("_StencilRef");
|
|
public static readonly int _StencilMask = Shader.PropertyToID("_StencilMask");
|
|
|
|
public static readonly int _FullCoCTexture = Shader.PropertyToID("_FullCoCTexture");
|
|
public static readonly int _HalfCoCTexture = Shader.PropertyToID("_HalfCoCTexture");
|
|
public static readonly int _DofTexture = Shader.PropertyToID("_DofTexture");
|
|
public static readonly int _CoCParams = Shader.PropertyToID("_CoCParams");
|
|
public static readonly int _BokehKernel = Shader.PropertyToID("_BokehKernel");
|
|
public static readonly int _PongTexture = Shader.PropertyToID("_PongTexture");
|
|
public static readonly int _PingTexture = Shader.PropertyToID("_PingTexture");
|
|
|
|
public static readonly int _Metrics = Shader.PropertyToID("_Metrics");
|
|
public static readonly int _AreaTexture = Shader.PropertyToID("_AreaTexture");
|
|
public static readonly int _SearchTexture = Shader.PropertyToID("_SearchTexture");
|
|
public static readonly int _EdgeTexture = Shader.PropertyToID("_EdgeTexture");
|
|
public static readonly int _BlendTexture = Shader.PropertyToID("_BlendTexture");
|
|
|
|
public static readonly int _ColorTexture = Shader.PropertyToID("_ColorTexture");
|
|
public static readonly int _Params = Shader.PropertyToID("_Params");
|
|
public static readonly int _MainTexLowMip = Shader.PropertyToID("_MainTexLowMip");
|
|
public static readonly int _Bloom_Params = Shader.PropertyToID("_Bloom_Params");
|
|
public static readonly int _Bloom_RGBM = Shader.PropertyToID("_Bloom_RGBM");
|
|
public static readonly int _Bloom_Texture = Shader.PropertyToID("_Bloom_Texture");
|
|
public static readonly int _LensDirt_Texture = Shader.PropertyToID("_LensDirt_Texture");
|
|
public static readonly int _LensDirt_Params = Shader.PropertyToID("_LensDirt_Params");
|
|
public static readonly int _LensDirt_Intensity = Shader.PropertyToID("_LensDirt_Intensity");
|
|
public static readonly int _Distortion_Params1 = Shader.PropertyToID("_Distortion_Params1");
|
|
public static readonly int _Distortion_Params2 = Shader.PropertyToID("_Distortion_Params2");
|
|
public static readonly int _Chroma_Params = Shader.PropertyToID("_Chroma_Params");
|
|
public static readonly int _Vignette_Params1 = Shader.PropertyToID("_Vignette_Params1");
|
|
public static readonly int _Vignette_Params2 = Shader.PropertyToID("_Vignette_Params2");
|
|
public static readonly int _Lut_Params = Shader.PropertyToID("_Lut_Params");
|
|
public static readonly int _UserLut_Params = Shader.PropertyToID("_UserLut_Params");
|
|
public static readonly int _InternalLut = Shader.PropertyToID("_InternalLut");
|
|
public static readonly int _UserLut = Shader.PropertyToID("_UserLut");
|
|
|
|
public static int[] _BloomMipUp;
|
|
public static int[] _BloomMipDown;
|
|
}
|
|
|
|
#endregion
|
|
}
|
|
}
|