using System;
namespace UnityEngine.Rendering.Universal.Internal
{
///
/// Render all objects that have a 'DepthOnly' pass into the given depth buffer.
///
/// You can use this pass to prime a depth buffer for subsequent rendering.
/// Use it as a z-prepass, or use it to generate a depth buffer.
///
public class DepthOnlyPass : ScriptableRenderPass
{
int kDepthBufferBits = 32;
private RenderTargetHandle depthAttachmentHandle { get; set; }
internal RenderTextureDescriptor descriptor { get; private set; }
FilteringSettings m_FilteringSettings;
string m_ProfilerTag = "Depth Prepass";
ShaderTagId m_ShaderTagId = new ShaderTagId("DepthOnly");
///
/// Create the DepthOnlyPass
///
public DepthOnlyPass(RenderPassEvent evt, RenderQueueRange renderQueueRange, LayerMask layerMask)
{
m_FilteringSettings = new FilteringSettings(renderQueueRange, layerMask);
renderPassEvent = evt;
}
///
/// Configure the pass
///
public void Setup(
RenderTextureDescriptor baseDescriptor,
RenderTargetHandle depthAttachmentHandle)
{
this.depthAttachmentHandle = depthAttachmentHandle;
baseDescriptor.colorFormat = RenderTextureFormat.Depth;
baseDescriptor.depthBufferBits = kDepthBufferBits;
// Depth-Only pass don't use MSAA
baseDescriptor.msaaSamples = 1;
descriptor = baseDescriptor;
}
public override void Configure(CommandBuffer cmd, RenderTextureDescriptor cameraTextureDescriptor)
{
cmd.GetTemporaryRT(depthAttachmentHandle.id, descriptor, FilterMode.Point);
ConfigureTarget(depthAttachmentHandle.Identifier());
ConfigureClear(ClearFlag.All, Color.black);
}
///
public override void Execute(ScriptableRenderContext context, ref RenderingData renderingData)
{
CommandBuffer cmd = CommandBufferPool.Get(m_ProfilerTag);
using (new ProfilingSample(cmd, m_ProfilerTag))
{
context.ExecuteCommandBuffer(cmd);
cmd.Clear();
var sortFlags = renderingData.cameraData.defaultOpaqueSortFlags;
var drawSettings = CreateDrawingSettings(m_ShaderTagId, ref renderingData, sortFlags);
drawSettings.perObjectData = PerObjectData.None;
ref CameraData cameraData = ref renderingData.cameraData;
Camera camera = cameraData.camera;
if (cameraData.isStereoEnabled)
context.StartMultiEye(camera);
context.DrawRenderers(renderingData.cullResults, ref drawSettings, ref m_FilteringSettings);
}
context.ExecuteCommandBuffer(cmd);
CommandBufferPool.Release(cmd);
}
///
public override void FrameCleanup(CommandBuffer cmd)
{
if (cmd == null)
throw new ArgumentNullException("cmd");
if (depthAttachmentHandle != RenderTargetHandle.CameraTarget)
{
cmd.ReleaseTemporaryRT(depthAttachmentHandle.id);
depthAttachmentHandle = RenderTargetHandle.CameraTarget;
}
}
}
}