revival/game/Assets/Scripts/Rendering/DrawFullscreenPass.cs

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C#
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2021-04-24 03:06:03 +02:00
using UnityEngine;
using UnityEngine.Rendering;
using UnityEngine.Rendering.Universal;
public class DrawFullscreenPass : ScriptableRenderPass
{
public FilterMode FilterMode { get; set; }
public DrawFullscreenFeature.Settings Settings { get; set; }
private RenderTargetIdentifier _source;
private RenderTargetIdentifier _destination;
private int _temporaryRTId = Shader.PropertyToID("TempRT");
private int _sourceId;
private int _destinationId;
private bool _isSourceAndDestinationSameTarget;
private string _profilerTag;
public DrawFullscreenPass(string tag)
{
_profilerTag = tag;
}
public override void OnCameraSetup(CommandBuffer cmd, ref RenderingData renderingData)
{
RenderTextureDescriptor blitTargetDescriptor = renderingData.cameraData.cameraTargetDescriptor;
blitTargetDescriptor.depthBufferBits = 0;
_isSourceAndDestinationSameTarget =
Settings.sourceType == Settings.destinationType &&
(Settings.sourceType == BufferType.CameraColor ||
Settings.sourceTextureId == Settings.destinationTextureId);
var renderer = renderingData.cameraData.renderer;
if (Settings.sourceType == BufferType.CameraColor)
{
_sourceId = -1;
_source = renderer.cameraColorTarget;
}
else
{
_sourceId = Shader.PropertyToID(Settings.sourceTextureId);
cmd.GetTemporaryRT(_sourceId, blitTargetDescriptor, FilterMode);
_source = new RenderTargetIdentifier(_sourceId);
}
if (_isSourceAndDestinationSameTarget)
{
_destinationId = _temporaryRTId;
cmd.GetTemporaryRT(_destinationId, blitTargetDescriptor, FilterMode);
_destination = new RenderTargetIdentifier(_destinationId);
}
else if (Settings.destinationType == BufferType.CameraColor)
{
_destinationId = -1;
_destination = renderer.cameraColorTarget;
}
else
{
_destinationId = Shader.PropertyToID(Settings.destinationTextureId);
cmd.GetTemporaryRT(_destinationId, blitTargetDescriptor, FilterMode);
_destination = new RenderTargetIdentifier(_destinationId);
}
}
public override void Execute(ScriptableRenderContext context, ref RenderingData renderingData)
{
CommandBuffer cmd = CommandBufferPool.Get(_profilerTag);
if (_isSourceAndDestinationSameTarget)
{
cmd.Blit(_source, _destination, Settings.blitMaterial, Settings.blitMaterialPassIndex);
cmd.Blit(_destination, _source);
}
else
{
cmd.Blit(_source, _destination, Settings.blitMaterial, Settings.blitMaterialPassIndex);
}
context.ExecuteCommandBuffer(cmd);
CommandBufferPool.Release(cmd);
}
public override void FrameCleanup(CommandBuffer cmd)
{
if (_destinationId != -1)
{
cmd.ReleaseTemporaryRT(_destinationId);
}
if (_source == _destination && _source != -1)
{
cmd.ReleaseTemporaryRT(_sourceId);
}
}
}