/// <summary>
/// Perform effect permutations, before <see cref="Prepare"/>.
/// </summary>
/// <param name="context"></param>
public virtual void PrepareEffectPermutations(RenderDrawContext context)
{
}
protected abstract void DrawCore(RenderDrawContext context, RenderFrame output);
/// <summary>
/// Performs most of the work (computation and resource preparation). Later game simulation might be running during that step.
/// </summary>
/// <param name="context"></param>
public virtual void Prepare(RenderDrawContext context)
{
}
/// <summary>
/// Performs GPU updates and/or draw.
/// </summary>
/// <param name="context"></param>
/// <param name="renderView"></param>
/// <param name="renderViewStage"></param>
/// <param name="startIndex"></param>
/// <param name="endIndex"></param>
public virtual void Draw(RenderDrawContext context, RenderView renderView, RenderViewStage renderViewStage, int startIndex, int endIndex)
{
}
/// <inheritdoc/>
public override void Prepare(RenderDrawContext context)
{
EffectObjectNodes.Clear(false);
// Make sure descriptor set pool is large enough
var expectedDescriptorSetPoolSize = RenderNodes.Count * effectDescriptorSetSlots.Count;
if (ResourceGroupPool.Length < expectedDescriptorSetPoolSize)
{
Array.Resize(ref ResourceGroupPool, expectedDescriptorSetPoolSize);
}
// Allocate PerFrame, PerView and PerDraw resource groups and constant buffers
var renderEffects = RenderData.GetData(RenderEffectKey);
int effectSlotCount = EffectPermutationSlotCount;
foreach (var view in RenderSystem.Views)
{
var viewFeature = view.Features[Index];
Dispatcher.ForEach(viewFeature.RenderNodes, () => prepareThreadContext.Value, (renderNodeReference, batch) =>
{
var threadContext = batch.Context;
var renderNode = this.GetRenderNode(renderNodeReference);
var renderObject = renderNode.RenderObject;
// Get RenderEffect
var staticObjectNode = renderObject.StaticObjectNode;
var staticEffectObjectNode = staticObjectNode * effectSlotCount + effectSlots[renderNode.RenderStage.Index].Index;
var renderEffect = renderEffects[staticEffectObjectNode];
// Not compiled yet?
if (renderEffect.Effect == null)
{
renderNode.RenderEffect = renderEffect;
renderNode.EffectObjectNode = EffectObjectNodeReference.Invalid;
renderNode.Resources = null;
RenderNodes[renderNodeReference.Index] = renderNode;
return;
}
var renderEffectReflection = renderEffect.Reflection;
// PerView resources/cbuffer
var viewLayout = renderEffectReflection.PerViewLayout;
if (viewLayout != null)
{
var viewCount = RenderSystem.Views.Count;
if (viewLayout.Entries?.Length < viewCount)
{
// TODO: Should this be a first loop?
lock (viewLayout)
{
if (viewLayout.Entries?.Length < viewCount)
{
var newEntries = new ResourceGroupEntry[viewCount];
for (int index = 0; index < viewLayout.Entries.Length; index++)
{
newEntries[index] = viewLayout.Entries[index];
}
for (int index = viewLayout.Entries.Length; index < viewCount; index++)
{
newEntries[index].Resources = new ResourceGroup();
}
viewLayout.Entries = newEntries;
}
}
}
if (viewLayout.Entries[view.Index].MarkAsUsed(RenderSystem))
{
threadContext.ResourceGroupAllocator.PrepareResourceGroup(viewLayout, BufferPoolAllocationType.UsedMultipleTime, viewLayout.Entries[view.Index].Resources);
// Register it in list of view layouts to update for this frame
viewFeature.Layouts.Add(viewLayout);
}
}
// PerFrame resources/cbuffer
var frameLayout = renderEffect.Reflection.PerFrameLayout;
if (frameLayout != null && frameLayout.Entry.MarkAsUsed(RenderSystem))
{
threadContext.ResourceGroupAllocator.PrepareResourceGroup(frameLayout, BufferPoolAllocationType.UsedMultipleTime, frameLayout.Entry.Resources);
// Register it in list of view layouts to update for this frame
FrameLayouts.Add(frameLayout);
}
// PerDraw resources/cbuffer
// Get nodes
var viewObjectNode = GetViewObjectNode(renderNode.ViewObjectNode);
// Allocate descriptor set
renderNode.Resources = threadContext.ResourceGroupAllocator.AllocateResourceGroup();
if (renderEffectReflection.PerDrawLayout != null)
{
threadContext.ResourceGroupAllocator.PrepareResourceGroup(renderEffectReflection.PerDrawLayout, BufferPoolAllocationType.UsedOnce, renderNode.Resources);
}
// Create EffectObjectNode
var effectObjectNodeIndex = EffectObjectNodes.Add(new EffectObjectNode(renderEffect, viewObjectNode.ObjectNode));
// Link to EffectObjectNode (created right after)
// TODO: rewrite this
renderNode.EffectObjectNode = new EffectObjectNodeReference(effectObjectNodeIndex);
renderNode.RenderEffect = renderEffect;
// Bind well-known descriptor sets
var descriptorSetPoolOffset = ComputeResourceGroupOffset(renderNodeReference);
ResourceGroupPool[descriptorSetPoolOffset + perFrameDescriptorSetSlot.Index] = frameLayout?.Entry.Resources;
ResourceGroupPool[descriptorSetPoolOffset + perViewDescriptorSetSlot.Index] = renderEffect.Reflection.PerViewLayout?.Entries[view.Index].Resources;
ResourceGroupPool[descriptorSetPoolOffset + perDrawDescriptorSetSlot.Index] = renderNode.Resources;
// Create resource group for everything else in case of fallback effects
if (renderEffect.State != RenderEffectState.Normal && renderEffect.FallbackParameters != null)
{
if (renderEffect.FallbackParameterUpdater.ResourceGroups == null)
{
// First time
renderEffect.FallbackParameterUpdater = new EffectParameterUpdater(renderEffect.Reflection.FallbackUpdaterLayout, renderEffect.FallbackParameters);
}
renderEffect.FallbackParameterUpdater.Update(RenderSystem.GraphicsDevice, threadContext.ResourceGroupAllocator, renderEffect.FallbackParameters);
var fallbackResourceGroupMapping = renderEffect.Reflection.FallbackResourceGroupMapping;
for (int i = 0; i < fallbackResourceGroupMapping.Length; ++i)
{
ResourceGroupPool[descriptorSetPoolOffset + fallbackResourceGroupMapping[i]] = renderEffect.FallbackParameterUpdater.ResourceGroups[i];
}
}
// Compile pipeline state object (if first time or need change)
// TODO GRAPHICS REFACTOR how to invalidate if we want to change some state? (setting to null should be fine)
if (renderEffect.PipelineState == null)
{
var mutablePipelineState = batch.MutablePipelineState;
var pipelineState = mutablePipelineState.State;
pipelineState.SetDefaults();
// Effect
pipelineState.EffectBytecode = renderEffect.Effect.Bytecode;
pipelineState.RootSignature = renderEffect.Reflection.RootSignature;
// Extract outputs from render stage
pipelineState.Output = renderNode.RenderStage.Output;
pipelineState.RasterizerState.MultiSampleLevel = renderNode.RenderStage.Output.MultiSampleLevel;
// Bind VAO
ProcessPipelineState(Context, renderNodeReference, ref renderNode, renderObject, pipelineState);
PostProcessPipelineState?.Invoke(renderNodeReference, ref renderNode, renderObject, pipelineState);
mutablePipelineState.Update();
renderEffect.PipelineState = mutablePipelineState.CurrentState;
}
RenderNodes[renderNodeReference.Index] = renderNode;
});
viewFeature.RenderNodes.Close();
viewFeature.Layouts.Close();
}
EffectObjectNodes.Close();
FrameLayouts.Close();
}
protected override void ActivateOutputCore(RenderDrawContext context, RenderFrame output, bool disableDepth)
{
base.ActivateOutputCore(context, output, disableDepth);
context.CommandList.SetViewport(ComputedViewport);
}
public PrepareThreadContext(RenderContext renderContext)
{
MutablePipelineState = new MutablePipelineState(renderContext.GraphicsDevice);
Context = renderContext.GetThreadContext();
}
/// <param name="context"></param>
/// <inheritdoc/>
public override void PrepareEffectPermutations(RenderDrawContext context)
{
base.PrepareEffectPermutations(context);
// TODO: Temporary until we have a better system for handling permutations
var renderEffects = RenderData.GetData(RenderEffectKey);
int effectSlotCount = EffectPermutationSlotCount;
Dispatcher.ForEach(RenderSystem.Views, view =>
{
var viewFeature = view.Features[Index];
Dispatcher.ForEach(viewFeature.RenderNodes, renderNodeReference =>
{
var renderNode = this.GetRenderNode(renderNodeReference);
var renderObject = renderNode.RenderObject;
// Get RenderEffect
var staticObjectNode = renderObject.StaticObjectNode;
var staticEffectObjectNode = staticObjectNode * effectSlotCount + effectSlots[renderNode.RenderStage.Index].Index;
var renderEffect = renderEffects[staticEffectObjectNode];
var effectSelector = renderObject.ActiveRenderStages[renderNode.RenderStage.Index].EffectSelector;
// Create it (first time) or regenerate it if effect changed
if (renderEffect == null || effectSelector != renderEffect.EffectSelector)
{
renderEffect = new RenderEffect(renderObject.ActiveRenderStages[renderNode.RenderStage.Index].EffectSelector);
renderEffects[staticEffectObjectNode] = renderEffect;
}
// Is it the first time this frame that we check this RenderEffect?
if (renderEffect.MarkAsUsed(RenderSystem))
{
renderEffect.EffectValidator.BeginEffectValidation();
}
});
});
// Step1: Perform permutations
PrepareEffectPermutationsImpl(context);
// Step2: Compile effects
Dispatcher.ForEach(RenderObjects, renderObject =>
{
//var renderObject = RenderObjects[index];
var staticObjectNode = renderObject.StaticObjectNode;
for (int i = 0; i < effectSlotCount; ++i)
{
var staticEffectObjectNode = staticObjectNode * effectSlotCount + i;
var renderEffect = renderEffects[staticEffectObjectNode];
// Skip if not used
if (renderEffect == null)
{
continue;
}
// Skip reflection update unless a state change requires it
renderEffect.IsReflectionUpdateRequired = false;
if (!renderEffect.IsUsedDuringThisFrame(RenderSystem))
{
continue;
}
// Skip if nothing changed
if (renderEffect.EffectValidator.ShouldSkip)
{
// Reset pending effect, as it is now obsolete anyway
renderEffect.Effect = null;
renderEffect.State = RenderEffectState.Skip;
}
else if (renderEffect.EffectValidator.EndEffectValidation() && (renderEffect.Effect == null || !renderEffect.Effect.SourceChanged))
{
InvalidateEffectPermutation(renderObject, renderEffect);
// Still, let's check if there is a pending effect compiling
var pendingEffect = renderEffect.PendingEffect;
if (pendingEffect == null || !pendingEffect.IsCompleted)
{
continue;
}
renderEffect.ClearFallbackParameters();
if (pendingEffect.IsFaulted)
{
renderEffect.State = RenderEffectState.Error;
renderEffect.Effect = ComputeFallbackEffect?.Invoke(renderObject, renderEffect, RenderEffectState.Error);
}
else
{
renderEffect.State = RenderEffectState.Normal;
renderEffect.Effect = pendingEffect.Result;
}
renderEffect.PendingEffect = null;
}
else
{
// Reset pending effect, as it is now obsolete anyway
renderEffect.PendingEffect = null;
renderEffect.State = RenderEffectState.Normal;
// CompilerParameters are ThreadStatic
if (staticCompilerParameters == null)
{
staticCompilerParameters = new CompilerParameters();
}
foreach (var effectValue in renderEffect.EffectValidator.EffectValues)
{
staticCompilerParameters.SetObject(effectValue.Key, effectValue.Value);
}
var asyncEffect = RenderSystem.EffectSystem.LoadEffect(renderEffect.EffectSelector.EffectName, staticCompilerParameters);
staticCompilerParameters.Clear();
renderEffect.Effect = asyncEffect.Result;
if (renderEffect.Effect == null)
{
// Effect still compiling, let's find if there is a fallback
renderEffect.ClearFallbackParameters();
renderEffect.Effect = ComputeFallbackEffect?.Invoke(renderObject, renderEffect, RenderEffectState.Compiling);
renderEffect.PendingEffect = asyncEffect.Task;
renderEffect.State = RenderEffectState.Compiling;
}
}
renderEffect.IsReflectionUpdateRequired = true;
}
});
// Step3: Uupdate reflection infos (offset, etc...)
foreach (var renderObject in RenderObjects)
{
var staticObjectNode = renderObject.StaticObjectNode;
for (int i = 0; i < effectSlotCount; ++i)
{
var staticEffectObjectNode = staticObjectNode * effectSlotCount + i;
var renderEffect = renderEffects[staticEffectObjectNode];
// Skip if not used
if (renderEffect == null || !renderEffect.IsReflectionUpdateRequired)
{
continue;
}
var effect = renderEffect.Effect;
if (effect == null && renderEffect.State == RenderEffectState.Compiling)
{
// Need to wait for completion
renderEffect.Effect = effect = renderEffect.PendingEffect.Result;
renderEffect.State = RenderEffectState.Normal;
}
var effectHashCode = effect != null ? (uint)effect.GetHashCode() : 0;
// Effect is last 16 bits
renderObject.StateSortKey = (renderObject.StateSortKey & 0xFFFF0000) | (effectHashCode & 0x0000FFFF);
if (effect != null)
{
RenderEffectReflection renderEffectReflection;
if (!InstantiatedEffects.TryGetValue(effect, out renderEffectReflection))
{
renderEffectReflection = new RenderEffectReflection();
// Build root signature automatically from reflection
renderEffectReflection.DescriptorReflection = EffectDescriptorSetReflection.New(RenderSystem.GraphicsDevice, effect.Bytecode, effectDescriptorSetSlots, "PerFrame");
renderEffectReflection.ResourceGroupDescriptions = new ResourceGroupDescription[renderEffectReflection.DescriptorReflection.Layouts.Count];
// Compute ResourceGroup hashes
for (int index = 0; index < renderEffectReflection.DescriptorReflection.Layouts.Count; index++)
{
var descriptorSet = renderEffectReflection.DescriptorReflection.Layouts[index];
if (descriptorSet.Layout == null)
{
continue;
}
var constantBufferReflection = effect.Bytecode.Reflection.ConstantBuffers.FirstOrDefault(x => x.Name == descriptorSet.Name);
renderEffectReflection.ResourceGroupDescriptions[index] = new ResourceGroupDescription(descriptorSet.Layout, constantBufferReflection);
}
renderEffectReflection.RootSignature = RootSignature.New(RenderSystem.GraphicsDevice, renderEffectReflection.DescriptorReflection);
renderEffectReflection.BufferUploader.Compile(RenderSystem.GraphicsDevice, renderEffectReflection.DescriptorReflection, effect.Bytecode);
// Prepare well-known descriptor set layouts
renderEffectReflection.PerDrawLayout = CreateDrawResourceGroupLayout(renderEffectReflection.ResourceGroupDescriptions[perDrawDescriptorSetSlot.Index], renderEffect.State);
renderEffectReflection.PerFrameLayout = CreateFrameResourceGroupLayout(renderEffectReflection.ResourceGroupDescriptions[perFrameDescriptorSetSlot.Index], renderEffect.State);
renderEffectReflection.PerViewLayout = CreateViewResourceGroupLayout(renderEffectReflection.ResourceGroupDescriptions[perViewDescriptorSetSlot.Index], renderEffect.State);
InstantiatedEffects.Add(effect, renderEffectReflection);
// Notify a new effect has been compiled
EffectCompiled?.Invoke(RenderSystem, effect, renderEffectReflection);
}
// Setup fallback parameters
if (renderEffect.State != RenderEffectState.Normal && renderEffectReflection.FallbackUpdaterLayout == null)
{
// Process all "non standard" layouts
var layoutMapping = new int[renderEffectReflection.DescriptorReflection.Layouts.Count - 3];
var layouts = new DescriptorSetLayoutBuilder[renderEffectReflection.DescriptorReflection.Layouts.Count - 3];
int layoutMappingIndex = 0;
for (int index = 0; index < renderEffectReflection.DescriptorReflection.Layouts.Count; index++)
{
var layout = renderEffectReflection.DescriptorReflection.Layouts[index];
// Skip well-known layouts (already handled)
if (layout.Name == "PerDraw" || layout.Name == "PerFrame" || layout.Name == "PerView")
{
continue;
}
layouts[layoutMappingIndex] = layout.Layout;
layoutMapping[layoutMappingIndex++] = index;
}
renderEffectReflection.FallbackUpdaterLayout = new EffectParameterUpdaterLayout(RenderSystem.GraphicsDevice, effect, layouts);
renderEffectReflection.FallbackResourceGroupMapping = layoutMapping;
}
// Update effect
renderEffect.Effect = effect;
renderEffect.Reflection = renderEffectReflection;
// Invalidate pipeline state (new effect)
renderEffect.PipelineState = null;
renderEffects[staticEffectObjectNode] = renderEffect;
}
else
{
renderEffect.Reflection = RenderEffectReflection.Empty;
renderEffect.PipelineState = null;
}
}
}
}
public void Draw(RenderDrawContext renderDrawContext, RenderView renderView, RenderStage renderStage)
{
// Sync point: draw (from now, we should execute with a graphics device context to perform rendering)
// Look for the RenderViewStage corresponding to this RenderView | RenderStage combination
var renderViewStage = RenderViewStage.Invalid;
foreach (var currentRenderViewStage in renderView.RenderStages)
{
if (currentRenderViewStage.Index == renderStage.Index)
{
renderViewStage = currentRenderViewStage;
break;
}
}
if (renderViewStage.Index == -1)
{
throw new InvalidOperationException("Requested RenderView|RenderStage combination doesn't exist. Please add it to RenderView.RenderStages.");
}
// Perform updates once per change of RenderView
foreach (var renderFeature in RenderFeatures)
{
renderFeature.Draw(renderDrawContext, renderView, renderViewStage);
}
// Generate and execute draw jobs
var renderNodes = renderViewStage.SortedRenderNodes;
var renderNodeCount = renderViewStage.RenderNodes.Count;
if (renderNodeCount == 0)
{
return;
}
if (!GraphicsDevice.IsDeferred)
{
int currentStart, currentEnd;
for (currentStart = 0; currentStart < renderNodeCount; currentStart = currentEnd)
{
var currentRenderFeature = renderNodes[currentStart].RootRenderFeature;
currentEnd = currentStart + 1;
while (currentEnd < renderNodeCount && renderNodes[currentEnd].RootRenderFeature == currentRenderFeature)
{
currentEnd++;
}
// Divide into task chunks for parallelism
currentRenderFeature.Draw(renderDrawContext, renderView, renderViewStage, currentStart, currentEnd);
}
}
else
{
// Create at most one batch per processor
int batchCount = Math.Min(Environment.ProcessorCount, renderNodeCount);
int batchSize = (renderNodeCount + (batchCount - 1)) / batchCount;
batchCount = (renderNodeCount + (batchSize - 1)) / batchSize;
// Remember state
var depthStencilBuffer = renderDrawContext.CommandList.DepthStencilBuffer;
int renderTargetCount = renderDrawContext.CommandList.RenderTargetCount;
if (renderTargets == null)
{
renderTargets = new Texture[renderDrawContext.CommandList.RenderTargets.Length];
}
for (int i = 0; i < renderTargetCount; ++i)
{
renderTargets[i] = renderDrawContext.CommandList.RenderTargets[i];
}
var viewport = renderDrawContext.CommandList.Viewport;
var scissor = renderDrawContext.CommandList.Scissor;
// Collect one command list per batch and the main one up to this point
if (commandLists == null || commandLists.Length < batchCount + 1)
{
Array.Resize(ref commandLists, batchCount + 1);
}
commandLists[0] = renderDrawContext.CommandList.Close();
Dispatcher.For(0, batchCount, () => renderDrawContext.RenderContext.GetThreadContext(), (batchIndex, threadContext) =>
{
threadContext.CommandList.Reset();
threadContext.CommandList.ClearState();
// Transfer state to all command lists
threadContext.CommandList.SetRenderTargets(depthStencilBuffer, renderTargetCount, renderTargets);
threadContext.CommandList.SetViewport(viewport);
threadContext.CommandList.SetScissorRectangle(scissor);
var currentStart = batchSize * batchIndex;
int currentEnd;
var endExclusive = Math.Min(renderNodeCount, currentStart + batchSize);
if (endExclusive <= currentStart)
{
return;
}
for (; currentStart < endExclusive; currentStart = currentEnd)
{
var currentRenderFeature = renderNodes[currentStart].RootRenderFeature;
currentEnd = currentStart + 1;
while (currentEnd < endExclusive && renderNodes[currentEnd].RootRenderFeature == currentRenderFeature)
{
currentEnd++;
}
// Divide into task chunks for parallelism
currentRenderFeature.Draw(threadContext, renderView, renderViewStage, currentStart, currentEnd);
}
commandLists[batchIndex + 1] = threadContext.CommandList.Close();
});
GraphicsDevice.ExecuteCommandLists(batchCount + 1, commandLists);
renderDrawContext.CommandList.Reset();
renderDrawContext.CommandList.ClearState();
// Reapply previous state
renderDrawContext.CommandList.SetRenderTargets(depthStencilBuffer, renderTargetCount, renderTargets);
renderDrawContext.CommandList.SetViewport(viewport);
renderDrawContext.CommandList.SetScissorRectangle(scissor);
}
}
/// <summary>
/// Performs most of the work (computation and resource preparation). Later game simulation might be running during that step.
/// </summary>
/// <param name="context"></param>
public unsafe void Prepare(RenderDrawContext context)
{
// Sync point: after extract, before prepare (game simulation could resume now)
// Generate and execute prepare effect jobs
foreach (var renderFeature in RenderFeatures)
// We might be able to parallelize too as long as we resepect render feature dependency graph (probably very few dependencies in practice)
{
// Divide into task chunks for parallelism
renderFeature.PrepareEffectPermutations(context);
}
// Generate and execute prepare jobs
foreach (var renderFeature in RenderFeatures)
// We might be able to parallelize too as long as we resepect render feature dependency graph (probably very few dependencies in practice)
{
// Divide into task chunks for parallelism
renderFeature.Prepare(context);
}
// Sort
Dispatcher.ForEach(Views, view =>
{
Dispatcher.For(0, view.RenderStages.Count, () => prepareThreadLocals.Acquire(), (index, local) =>
{
var renderViewStage = view.RenderStages[index];
var renderNodes = renderViewStage.RenderNodes;
if (renderNodes.Count == 0)
{
return;
}
var renderStage = RenderStages[renderViewStage.Index];
var sortedRenderNodes = renderViewStage.SortedRenderNodes;
// Fast clear, since it's cleared properly in Reset()
sortedRenderNodes.Resize(renderViewStage.RenderNodes.Count, true);
if (renderStage.SortMode != null)
{
// Make sure sortKeys is big enough
if (local.SortKeys == null || local.SortKeys.Length < renderNodes.Count)
{
Array.Resize(ref local.SortKeys, renderNodes.Count);
}
// renderNodes[start..end] belongs to the same render feature
fixed(SortKey * sortKeysPtr = local.SortKeys)
renderStage.SortMode.GenerateSortKey(view, renderViewStage, sortKeysPtr);
Dispatcher.Sort(local.SortKeys, 0, renderNodes.Count, Comparer <SortKey> .Default);
// Reorder list
for (int i = 0; i < renderNodes.Count; ++i)
{
sortedRenderNodes[i] = renderNodes[local.SortKeys[i].Index];
}
}
else
{
// No sorting, copy as is
for (int i = 0; i < renderNodes.Count; ++i)
{
sortedRenderNodes[i] = renderNodes[i];
}
}
}, state => prepareThreadLocals.Release(state));
});
// Flush the resources uploaded during Prepare
context.ResourceGroupAllocator.Flush();
context.RenderContext.Flush();
}
protected virtual void PostDrawCore(RenderDrawContext context)
{
}
/// <summary>
/// Draws a full screen quad using iterating on each pass of this effect.
/// </summary>
public void Draw(RenderDrawContext context, string nameFormat, params object[] args)
{
// TODO: this is alocating a string, we should try to not allocate here.
Draw(context, name: string.Format(nameFormat, args));
}
/// <summary>
/// Activates the output to the current <see cref="GraphicsDevice" />.
/// </summary>
/// <param name="context">The context.</param>
/// <param name="output">The output.</param>
/// <param name="disableDepth">if set to <c>true</c> [disable depth].</param>
protected virtual void ActivateOutputCore(RenderDrawContext context, RenderFrame output, bool disableDepth)
{
// Setup the render target
context.CommandList.SetRenderTargetsAndViewport(disableDepth ? null : output.DepthStencil, output.RenderTargets);
}