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);
}
}
internal RenderNodeReference CreateRenderNode(RenderObject renderObject, RenderView renderView, ViewObjectNodeReference renderPerViewNode, RenderStage renderStage)
{
var renderNode = new RenderNode(renderObject, renderView, renderPerViewNode, renderStage);
// Create view node
var index = RenderNodes.Add(renderNode);
var result = new RenderNodeReference(index);
return(result);
}
public RenderNode(RenderObject renderObject, RenderView renderView, ViewObjectNodeReference viewObjectNode, RenderStage renderStage)
{
RenderObject = renderObject;
RenderView = renderView;
ViewObjectNode = viewObjectNode;
EffectObjectNode = EffectObjectNodeReference.Invalid;
RenderStage = renderStage;
RenderEffect = null;
Resources = null;
}
public RenderViewStage(RenderStage renderStage)
{
Index = renderStage.Index;
RenderNodes = null;
SortedRenderNodes = null;
}
/// <summary>
/// Gets the effect slot for a given render stage.
/// </summary>
/// <param name="renderStage"></param>
/// <returns></returns>
public EffectPermutationSlot GetEffectPermutationSlot(RenderStage renderStage)
{
return(effectSlots[renderStage.Index]);
}