105 lines
3.9 KiB
C#
105 lines
3.9 KiB
C#
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using System;
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using Unity.Mathematics;
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using UnityEngine;
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using UnityEngine.Rendering;
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using UnityEngine.Rendering.Universal;
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namespace X.Rendering.Feature
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{
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public class SoftShadowMask : ScriptableRendererFeature
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{
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[Serializable]
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private class Settings
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{
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public bool BlurMask = false;
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public bool Use16Samples = true;
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public Material MaskMat = null;
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public Material BlurMat = null;
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}
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[SerializeField]
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private Settings settings = new();
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SoftShadowMaskPass shadowMaskPass;
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public override void Create()
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{
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shadowMaskPass = new(settings);
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}
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public override void AddRenderPasses(ScriptableRenderer renderer, ref RenderingData renderingData)
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{
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renderer.EnqueuePass(shadowMaskPass);
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}
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class SoftShadowMaskPass : ScriptableRenderPass
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{
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internal static readonly int SoftShadowMaskTextureId = Shader.PropertyToID("_SoftShadowMaskTexture");
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internal static readonly GlobalKeyword softShadowMaskKeyword = GlobalKeyword.Create("_SOFTSHADOW_MASK");
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private Settings settings;
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private ProfilingSampler profiler;
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Vector4[] offset16Array = new Vector4[8];
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Vector4[] offset5Array = new Vector4[2];
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RTHandle softShadowMask;
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public SoftShadowMaskPass(Settings settings)
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{
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this.settings = settings;
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renderPassEvent = RenderPassEvent.AfterRenderingPrePasses;
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profiler = new(nameof(SoftShadowMaskPass));
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}
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public override void Execute(ScriptableRenderContext context, ref RenderingData renderingData)
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{
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var cmd = renderingData.commandBuffer;
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using var scp = new ProfilingScope(cmd, profiler);
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cmd.EnableKeyword(softShadowMaskKeyword);
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var w = renderingData.cameraData.cameraTargetDescriptor.width;
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var h = renderingData.cameraData.cameraTargetDescriptor.height;
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float2 wh = new float2 { x = w, y = h };
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if (settings.Use16Samples)
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{
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cmd.EnableShaderKeyword("_Use16Samples");
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for (int i = 0; i < 8; ++i)
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{
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}
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cmd.SetGlobalVectorArray("_Offset16", offset16Array);
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}
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else
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{
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cmd.DisableShaderKeyword("_Use16Samples");
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for (int i = 0; i < 2; ++i)
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{
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offset5Array[i] = new float4(new float2(-1, 1) / wh, new float2(1, 1) / wh);
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offset5Array[i] = new float4(new float2(-1, -1) / wh, new float2(1, -1) / wh);
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}
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cmd.SetGlobalVectorArray("_Offset5", offset5Array);
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}
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RenderingUtils.ReAllocateIfNeeded(ref softShadowMask, new RenderTextureDescriptor()
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{
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bindMS = false,
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colorFormat = RenderTextureFormat.R8,
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width = w / 4,
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height = h / 4,
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enableRandomWrite = false,
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depthBufferBits = 0,
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dimension = TextureDimension.Tex2D,
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msaaSamples = 1,
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});
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cmd.SetRenderTarget(softShadowMask);
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cmd.DrawProcedural(Matrix4x4.identity, settings.MaskMat, 0, MeshTopology.Triangles, 3);
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cmd.SetGlobalTexture(SoftShadowMaskTextureId, softShadowMask);
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}
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public override void OnFinishCameraStackRendering(CommandBuffer cmd)
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{
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base.OnFinishCameraStackRendering(cmd);
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cmd.DisableKeyword(softShadowMaskKeyword);
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}
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}
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}
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}
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