private void Update(EvaluationContext context)
{
var resourceManager = ResourceManager.Instance();
var device = resourceManager.Device;
Size2 size = Resolution.GetValue(context);
if (size.Width == 0 || size.Height == 0)
{
size = context.RequestedResolution;
}
if (size.Width <= 0 || size.Height <= 0 || size.Width > MaximumTexture2DSize || size.Height > MaximumTexture2DSize)
{
Log.Warning("Invalid texture size: " + size);
return;
}
_sampleCount = Multisampling.GetValue(context).Clamp(1, 32);
bool generateMips = GenerateMips.GetValue(context);
var withDepthBuffer = WithDepthBuffer.GetValue(context);
UpdateTextures(device, size, TextureFormat.GetValue(context), withDepthBuffer ? Format.R32_Typeless : Format.Unknown, generateMips);
var deviceContext = device.ImmediateContext;
// Save settings in context
var prevRequestedResolution = context.RequestedResolution;
var prevViewports = deviceContext.Rasterizer.GetViewports <RawViewportF>();
var prevTargets = deviceContext.OutputMerger.GetRenderTargets(2, out var prevDepthStencilView);
var prevObjectToWorld = context.ObjectToWorld;
var prevWorldToCamera = context.WorldToCamera;
var prevCameraToClipSpace = context.CameraToClipSpace;
deviceContext.Rasterizer.SetViewport(new SharpDX.Viewport(0, 0, size.Width, size.Height, 0.0f, 1.0f));
deviceContext.OutputMerger.SetTargets(_multiSampledDepthBufferDsv, _multiSampledColorBufferRtv);
// Clear
var clear = Clear.GetValue(context);
var c = ClearColor.GetValue(context);
if (clear || !_wasClearedOnce)
{
try
{
deviceContext.ClearRenderTargetView(_multiSampledColorBufferRtv, new Color(c.X, c.Y, c.Z, c.W));
if (_multiSampledDepthBufferDsv != null)
{
deviceContext.ClearDepthStencilView(_multiSampledDepthBufferDsv, DepthStencilClearFlags.Depth, 1.0f, 0);
}
_wasClearedOnce = true;
}
catch
{
Log.Error($"{Parent.Symbol.Name}: Error clearing actual render target.", SymbolChildId);
}
}
// Set default values for new sub tree
context.RequestedResolution = size;
context.SetDefaultCamera();
if (TextureReference.IsConnected)
{
var reference = TextureReference.GetValue(context);
reference.ColorTexture = ColorTexture;
reference.DepthTexture = DepthTexture;
}
// Render
Command.GetValue(context);
// Restore context
context.ObjectToWorld = prevObjectToWorld;
context.WorldToCamera = prevWorldToCamera;
context.CameraToClipSpace = prevCameraToClipSpace;
context.RequestedResolution = prevRequestedResolution;
deviceContext.Rasterizer.SetViewports(prevViewports);
deviceContext.OutputMerger.SetTargets(prevDepthStencilView, prevTargets);
if (_sampleCount > 1)
{
try
{
device.ImmediateContext.ResolveSubresource(_multiSampledColorBuffer,
0,
_resolvedColorBuffer, 0,
_resolvedColorBuffer.Description.Format);
if (withDepthBuffer)
{
ResolveDepthBuffer();
}
}
catch (Exception e)
{
Log.Error("resolving render target buffer failed:" + e.Message);
}
}
if (generateMips)
{
deviceContext.GenerateMips(DownSamplingRequired ? _resolvedColorBufferSrv : _multiSampledColorBufferSrv);
}
// Clean up ref counts for RTVs
for (int i = 0; i < prevTargets.Length; i++)
{
prevTargets[i]?.Dispose();
}
prevDepthStencilView?.Dispose();
ColorBuffer.Value = ColorTexture;
ColorBuffer.DirtyFlag.Clear();
DepthBuffer.Value = DepthTexture;
DepthBuffer.DirtyFlag.Clear();
}