public override unsafe void Prepare(RenderDrawContext context)
{
var previousTransformationInfoData = rootRenderFeature.RenderData.GetData(previousTransformationInfoKey);
var previousTransformationViewInfoData = rootRenderFeature.RenderData.GetData(previousTransformationViewInfoKey);
var renderModelObjectInfoData = rootRenderFeature.RenderData.GetData(renderModelObjectInfoKey);
// Calculate previous WVP matrix per view and object
usageCounter++;
for (int index = 0; index < RenderSystem.Views.Count; index++)
{
var view = RenderSystem.Views[index];
var viewFeature = view.Features[rootRenderFeature.Index];
bool useView = false;
foreach (var stage in RenderSystem.RenderStages)
{
foreach (var renderViewStage in view.RenderStages)
{
if (renderViewStage.Index == stage.Index && stage.OutputValidator?.Find <VelocityTargetSemantic>() >= 0)
{
useView = true;
break;
}
}
}
if (!useView)
{
continue;
}
// Cache per-view data locally
RenderViewData viewData;
if (!renderViewDatas.TryGetValue(view, out viewData))
{
viewData = new RenderViewData();
renderViewDatas.Add(view, viewData);
}
Dispatcher.ForEach(viewFeature.ViewObjectNodes, renderPerViewNodeReference =>
{
var renderPerViewNode = rootRenderFeature.GetViewObjectNode(renderPerViewNodeReference);
var renderModelFrameInfo = renderModelObjectInfoData[renderPerViewNode.ObjectNode];
Matrix previousViewProjection = viewData.PreviousViewProjection;
Matrix previousWorldViewProjection;
Matrix.Multiply(ref renderModelFrameInfo.World, ref previousViewProjection, out previousWorldViewProjection);
previousTransformationViewInfoData[renderPerViewNodeReference] = new PreviousObjectViewInfo
{
WorldViewProjection = previousWorldViewProjection,
};
});
// Shift current view projection transform into previous
viewData.PreviousViewProjection = view.ViewProjection;
viewData.UsageCounter = usageCounter;
updatedViews.Add(view);
}
foreach (var view in renderViewDatas.Keys.ToArray())
{
if (!updatedViews.Contains(view))
{
renderViewDatas.Remove(view);
}
}
updatedViews.Clear();
// Update cbuffer for previous WVP matrix
Dispatcher.ForEach(((RootEffectRenderFeature)rootRenderFeature).RenderNodes, (ref RenderNode renderNode) =>
{
var perDrawLayout = renderNode.RenderEffect.Reflection.PerDrawLayout;
if (perDrawLayout == null)
{
return;
}
var previousWvpOffset = perDrawLayout.GetConstantBufferOffset(previousWorldViewProjection);
if (previousWvpOffset == -1)
{
return;
}
var mappedCB = renderNode.Resources.ConstantBuffer.Data;
var previousPerDraw = (PreviousPerDraw *)((byte *)mappedCB + previousWvpOffset);
var renderModelFrameInfo = renderModelObjectInfoData[renderNode.RenderObject.ObjectNode];
var renderModelPreviousFrameInfo = previousTransformationViewInfoData[renderNode.ViewObjectNode];
// Shift current world transform into previous transform
previousTransformationInfoData[renderNode.RenderObject.StaticObjectNode] = new StaticObjectInfo
{
World = renderModelFrameInfo.World,
};
previousPerDraw->PreviousWorldViewProjection = renderModelPreviousFrameInfo.WorldViewProjection;
});
}
/// <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();
}
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>
/// 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));
}