// Generates an in-place depth pyramid
// TODO: Mip-mapping depth is problematic for precision at lower mips, generate a packed atlas instead
public void RenderMinDepthPyramid(CommandBuffer cmd, RenderTexture texture, HDUtils.PackedMipChainInfo info)
{
HDUtils.CheckRTCreated(texture);
var cs = m_DepthPyramidCS;
int kernel = m_DepthDownsampleKernel;
// TODO: Do it 1x MIP at a time for now. In the future, do 4x MIPs per pass, or even use a single pass.
// Note: Gather() doesn't take a LOD parameter and we cannot bind an SRV of a MIP level,
// and we don't support Min samplers either. So we are forced to perform 4x loads.
for (int i = 1; i < info.mipLevelCount; i++)
{
Vector2Int dstSize = info.mipLevelSizes[i];
Vector2Int dstOffset = info.mipLevelOffsets[i];
Vector2Int srcSize = info.mipLevelSizes[i - 1];
Vector2Int srcOffset = info.mipLevelOffsets[i - 1];
Vector2Int srcLimit = srcOffset + srcSize - Vector2Int.one;
m_SrcOffset[0] = srcOffset.x;
m_SrcOffset[1] = srcOffset.y;
m_SrcOffset[2] = srcLimit.x;
m_SrcOffset[3] = srcLimit.y;
m_DstOffset[0] = dstOffset.x;
m_DstOffset[1] = dstOffset.y;
m_DstOffset[2] = 0;
m_DstOffset[3] = 0;
cmd.SetComputeIntParams(cs, HDShaderIDs._SrcOffsetAndLimit, m_SrcOffset);
cmd.SetComputeIntParams(cs, HDShaderIDs._DstOffset, m_DstOffset);
cmd.SetComputeTextureParam(cs, kernel, HDShaderIDs._DepthMipChain, texture);
cmd.DispatchCompute(cs, kernel, HDUtils.DivRoundUp(dstSize.x, 8), HDUtils.DivRoundUp(dstSize.y, 8), 1);
}
}
public void InitSharedBuffers(GBufferManager gbufferManager, RenderPipelineSettings settings, RenderPipelineResources resources)
{
// Set the flags
m_MSAASupported = settings.supportMSAA;
m_MSAASamples = m_MSAASupported ? settings.msaaSampleCount : MSAASamples.None;
m_VelocitySupport = settings.supportMotionVectors;
m_ReuseGBufferMemory = settings.supportedLitShaderMode != RenderPipelineSettings.SupportedLitShaderMode.ForwardOnly;
// Create the depth/stencil buffer
m_CameraDepthStencilBuffer = RTHandles.Alloc(Vector2.one, depthBufferBits: DepthBits.Depth32, colorFormat: RenderTextureFormat.Depth, filterMode: FilterMode.Point, name: "CameraDepthStencil");
// Create the mip chain buffer
m_CameraDepthBufferMipChainInfo = new HDUtils.PackedMipChainInfo();
m_CameraDepthBufferMipChainInfo.Allocate();
m_CameraDepthBufferMipChain = RTHandles.Alloc(ComputeDepthBufferMipChainSize, colorFormat: RenderTextureFormat.RFloat, filterMode: FilterMode.Point, sRGB: false, enableRandomWrite: true, name: "CameraDepthBufferMipChain");
// Technically we won't need this buffer in some cases, but nothing that we can determine at init time.
m_CameraStencilBufferCopy = RTHandles.Alloc(Vector2.one, depthBufferBits: DepthBits.None, colorFormat: RenderTextureFormat.R8, sRGB: false, filterMode: FilterMode.Point, enableRandomWrite: true, name: "CameraStencilCopy"); // DXGI_FORMAT_R8_UINT is not supported by Unity
if (m_VelocitySupport)
{
m_VelocityRT = RTHandles.Alloc(Vector2.one, filterMode: FilterMode.Point, colorFormat: Builtin.GetVelocityBufferFormat(), sRGB: Builtin.GetVelocityBufferSRGBFlag(), name: "Velocity");
if (m_MSAASupported)
{
m_VelocityMSAART = RTHandles.Alloc(Vector2.one, filterMode: FilterMode.Point, colorFormat: Builtin.GetVelocityBufferFormat(), sRGB: Builtin.GetVelocityBufferSRGBFlag(), enableMSAA: true, bindTextureMS: true, name: "VelocityMSAA");
}
}
// Allocate the additional textures only if MSAA is supported
if (m_MSAASupported)
{
// Let's create the MSAA textures
m_CameraDepthStencilMSAABuffer = RTHandles.Alloc(Vector2.one, depthBufferBits: DepthBits.Depth24, colorFormat: RenderTextureFormat.Depth, filterMode: FilterMode.Point, bindTextureMS: true, enableMSAA: true, name: "CameraDepthStencilMSAA");
m_CameraDepthValuesBuffer = RTHandles.Alloc(Vector2.one, filterMode: FilterMode.Point, colorFormat: RenderTextureFormat.ARGBFloat, sRGB: false, name: "DepthValuesBuffer");
m_DepthAsColorMSAART = RTHandles.Alloc(Vector2.one, filterMode: FilterMode.Point, colorFormat: RenderTextureFormat.RFloat, sRGB: false, bindTextureMS: true, enableMSAA: true, name: "DepthAsColorMSAA");
// We need to allocate this texture as long as msaa is supported because on both mode, one of the cameras can be forward only using the framesettings
m_NormalMSAART = RTHandles.Alloc(Vector2.one, filterMode: FilterMode.Point, colorFormat: RenderTextureFormat.ARGB32, sRGB: false, enableMSAA: true, bindTextureMS: true, name: "NormalBufferMSAA");
// Create the required resolve materials
m_DepthResolveMaterial = CoreUtils.CreateEngineMaterial(resources.shaders.depthValuesPS);
m_ColorResolveMaterial = CoreUtils.CreateEngineMaterial(resources.shaders.colorResolvePS);
}
// If we are in the forward only mode
if (!m_ReuseGBufferMemory)
{
// In case of full forward we must allocate the render target for normal buffer (or reuse one already existing)
// TODO: Provide a way to reuse a render target
m_NormalRT = RTHandles.Alloc(Vector2.one, filterMode: FilterMode.Point, colorFormat: RenderTextureFormat.ARGB32, sRGB: false, enableRandomWrite: true, name: "NormalBuffer");
}
else
{
// When not forward only we should are using the normal buffer of the gbuffer
// In case of deferred, we must be in sync with NormalBuffer.hlsl and lit.hlsl files and setup the correct buffers
m_NormalRT = gbufferManager.GetNormalBuffer(0); // Normal + Roughness
}
}
public void InitSharedBuffers(GBufferManager gbufferManager, RenderPipelineSettings settings, RenderPipelineResources resources)
{
// Set the flags
m_MSAASupported = settings.supportMSAA;
m_MSAASamples = m_MSAASupported ? settings.msaaSampleCount : MSAASamples.None;
m_MotionVectorsSupport = settings.supportMotionVectors;
m_ReuseGBufferMemory = settings.supportedLitShaderMode != RenderPipelineSettings.SupportedLitShaderMode.ForwardOnly;
// Create the depth/stencil buffer
m_CameraDepthStencilBuffer = RTHandles.Alloc(Vector2.one, depthBufferBits: DepthBits.Depth32, filterMode: FilterMode.Point, xrInstancing: true, useDynamicScale: true, name: "CameraDepthStencil");
// Create the mip chain buffer
m_CameraDepthBufferMipChainInfo = new HDUtils.PackedMipChainInfo();
m_CameraDepthBufferMipChainInfo.Allocate();
m_CameraDepthBufferMipChain = RTHandles.Alloc(ComputeDepthBufferMipChainSize, colorFormat: UnityEngine.Experimental.Rendering.HDPipeline.HDRenderPipeline.OverrideRTGraphicsFormat(GraphicsFormat.R32_SFloat), filterMode: FilterMode.Point, enableRandomWrite: true, xrInstancing: true, useDynamicScale: true, name: "CameraDepthBufferMipChain");
if (settings.lowresTransparentSettings.enabled)
{
// Create the half res depth buffer used for low resolution transparency
m_CameraHalfResDepthBuffer = RTHandles.Alloc(Vector2.one * 0.5f, depthBufferBits: DepthBits.Depth32, filterMode: FilterMode.Point, xrInstancing: true, useDynamicScale: true, name: "LowResDepthBuffer");
}
// Technically we won't need this buffer in some cases, but nothing that we can determine at init time.
m_CameraStencilBufferCopy = RTHandles.Alloc(Vector2.one, depthBufferBits: DepthBits.None, colorFormat: UnityEngine.Experimental.Rendering.HDPipeline.HDRenderPipeline.OverrideRTGraphicsFormat(GraphicsFormat.R8_UNorm), filterMode: FilterMode.Point, enableRandomWrite: true, xrInstancing: true, useDynamicScale: true, name: "CameraStencilCopy"); // DXGI_FORMAT_R8_UINT is not supported by Unity
if (m_MotionVectorsSupport)
{
m_MotionVectorsRT = RTHandles.Alloc(Vector2.one, filterMode: FilterMode.Point, colorFormat: Builtin.GetMotionVectorFormat(), xrInstancing: true, useDynamicScale: true, name: "MotionVectors");
if (m_MSAASupported)
{
m_MotionVectorsMSAART = RTHandles.Alloc(Vector2.one, filterMode: FilterMode.Point, colorFormat: Builtin.GetMotionVectorFormat(), enableMSAA: true, bindTextureMS: true, xrInstancing: true, useDynamicScale: true, name: "MotionVectorsMSAA");
}
}
// Allocate the additional textures only if MSAA is supported
if (m_MSAASupported)
{
// Let's create the MSAA textures
m_CameraDepthStencilMSAABuffer = RTHandles.Alloc(Vector2.one, depthBufferBits: DepthBits.Depth24, filterMode: FilterMode.Point, bindTextureMS: true, enableMSAA: true, xrInstancing: true, useDynamicScale: true, name: "CameraDepthStencilMSAA");
m_CameraDepthValuesBuffer = RTHandles.Alloc(Vector2.one, filterMode: FilterMode.Point, colorFormat: UnityEngine.Experimental.Rendering.HDPipeline.HDRenderPipeline.OverrideRTGraphicsFormat(GraphicsFormat.R32G32B32A32_SFloat), xrInstancing: true, useDynamicScale: true, name: "DepthValuesBuffer");
m_DepthAsColorMSAART = RTHandles.Alloc(Vector2.one, filterMode: FilterMode.Point, colorFormat: UnityEngine.Experimental.Rendering.HDPipeline.HDRenderPipeline.OverrideRTGraphicsFormat(GraphicsFormat.R32_SFloat), bindTextureMS: true, enableMSAA: true, xrInstancing: true, useDynamicScale: true, name: "DepthAsColorMSAA");
// We need to allocate this texture as long as msaa is supported because on both mode, one of the cameras can be forward only using the framesettings
m_NormalMSAART = RTHandles.Alloc(Vector2.one, filterMode: FilterMode.Point, colorFormat: UnityEngine.Experimental.Rendering.HDPipeline.HDRenderPipeline.OverrideRTGraphicsFormat(GraphicsFormat.R8G8B8A8_UNorm), enableMSAA: true, bindTextureMS: true, xrInstancing: true, useDynamicScale: true, name: "NormalBufferMSAA");
// Create the required resolve materials
m_DepthResolveMaterial = CoreUtils.CreateEngineMaterial(resources.shaders.depthValuesPS);
m_ColorResolveMaterial = CoreUtils.CreateEngineMaterial(resources.shaders.colorResolvePS);
}
// If we are in the forward only mode
if (!m_ReuseGBufferMemory)
{
// In case of full forward we must allocate the render target for normal buffer (or reuse one already existing)
// TODO: Provide a way to reuse a render target
m_NormalRT = RTHandles.Alloc(Vector2.one, filterMode: FilterMode.Point, colorFormat: UnityEngine.Experimental.Rendering.HDPipeline.HDRenderPipeline.OverrideRTGraphicsFormat(GraphicsFormat.R8G8B8A8_UNorm), enableRandomWrite: true, xrInstancing: true, useDynamicScale: true, name: "NormalBuffer");
}
else
{
// When not forward only we should are using the normal buffer of the gbuffer
// In case of deferred, we must be in sync with NormalBuffer.hlsl and lit.hlsl files and setup the correct buffers
m_NormalRT = gbufferManager.GetNormalBuffer(0); // Normal + Roughness
}
}
