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382 行
14 KiB
382 行
14 KiB
using UnityEngine;
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using System.Collections;
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[ExecuteInEditMode]
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[RequireComponent (typeof(Camera))]
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[AddComponentMenu ("Image Effects/Camera/Depth of Field (Lens Blur, Scatter, DX11)") ]
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public class DepthOfField : PostEffectsBase {
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public bool visualizeFocus = false;
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public float focalLength = 10.0f;
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public float focalSize = 0.05f;
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public float aperture = 11.5f;
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public Transform focalTransform = null;
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public float maxBlurSize = 2.0f;
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public bool highResolution = false;
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public enum BlurType {
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DiscBlur = 0,
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DX11 = 1,
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}
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public enum BlurSampleCount {
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Low = 0,
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Medium = 1,
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High = 2,
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}
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public BlurType blurType = BlurType.DiscBlur;
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public BlurSampleCount blurSampleCount = BlurSampleCount.High;
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public bool nearBlur = false;
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public float foregroundOverlap = 1.0f;
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public Shader dofHdrShader;
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private Material dofHdrMaterial = null;
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public Shader dx11BokehShader;
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private Material dx11bokehMaterial;
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public float dx11BokehThreshhold = 0.5f;
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public float dx11SpawnHeuristic = 0.0875f;
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public Texture2D dx11BokehTexture = null;
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public float dx11BokehScale = 1.2f;
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public float dx11BokehIntensity = 2.5f;
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private float focalDistance01 = 10.0f;
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private ComputeBuffer cbDrawArgs;
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private ComputeBuffer cbPoints;
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private float internalBlurWidth = 1.0f;
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public override bool CheckResources (){
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CheckSupport (true); // only requires depth, not HDR
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dofHdrMaterial = CheckShaderAndCreateMaterial (dofHdrShader, dofHdrMaterial);
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if(supportDX11 && blurType == BlurType.DX11) {
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dx11bokehMaterial = CheckShaderAndCreateMaterial(dx11BokehShader, dx11bokehMaterial);
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CreateComputeResources ();
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}
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if(!isSupported)
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ReportAutoDisable ();
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return isSupported;
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}
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void OnEnable (){
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GetComponent<Camera>().depthTextureMode |= DepthTextureMode.Depth;
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}
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void OnDisable (){
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ReleaseComputeResources ();
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if(dofHdrMaterial) DestroyImmediate(dofHdrMaterial);
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dofHdrMaterial = null;
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if(dx11bokehMaterial) DestroyImmediate(dx11bokehMaterial);
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dx11bokehMaterial = null;
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}
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void ReleaseComputeResources (){
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if(cbDrawArgs != null) cbDrawArgs.Release();
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cbDrawArgs = null;
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if(cbPoints != null) cbPoints.Release();
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cbPoints = null;
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}
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void CreateComputeResources (){
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if (cbDrawArgs == null)
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{
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cbDrawArgs = new ComputeBuffer (1, 16, ComputeBufferType.DrawIndirect);
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var args= new int[4];
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args[0] = 0; args[1] = 1; args[2] = 0; args[3] = 0;
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cbDrawArgs.SetData (args);
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}
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if (cbPoints == null)
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{
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cbPoints = new ComputeBuffer (90000, 12+16, ComputeBufferType.Append);
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}
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}
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float FocalDistance01 ( float worldDist ){
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return GetComponent<Camera>().WorldToViewportPoint((worldDist-GetComponent<Camera>().nearClipPlane) * GetComponent<Camera>().transform.forward + GetComponent<Camera>().transform.position).z / (GetComponent<Camera>().farClipPlane-GetComponent<Camera>().nearClipPlane);
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}
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private void WriteCoc ( RenderTexture fromTo , bool fgDilate ){
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dofHdrMaterial.SetTexture("_FgOverlap", null);
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if (nearBlur && fgDilate) {
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int rtW = fromTo.width/2;
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int rtH = fromTo.height/2;
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// capture fg coc
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RenderTexture temp2 = RenderTexture.GetTemporary (rtW, rtH, 0, fromTo.format);
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Graphics.Blit (fromTo, temp2, dofHdrMaterial, 4);
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// special blur
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float fgAdjustment = internalBlurWidth * foregroundOverlap;
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dofHdrMaterial.SetVector ("_Offsets", new Vector4 (0.0f, fgAdjustment , 0.0f, fgAdjustment));
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RenderTexture temp1 = RenderTexture.GetTemporary (rtW, rtH, 0, fromTo.format);
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Graphics.Blit (temp2, temp1, dofHdrMaterial, 2);
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RenderTexture.ReleaseTemporary(temp2);
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dofHdrMaterial.SetVector ("_Offsets", new Vector4 (fgAdjustment, 0.0f, 0.0f, fgAdjustment));
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temp2 = RenderTexture.GetTemporary (rtW, rtH, 0, fromTo.format);
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Graphics.Blit (temp1, temp2, dofHdrMaterial, 2);
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RenderTexture.ReleaseTemporary(temp1);
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// "merge up" with background COC
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dofHdrMaterial.SetTexture("_FgOverlap", temp2);
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fromTo.MarkRestoreExpected(); // only touching alpha channel, RT restore expected
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Graphics.Blit (fromTo, fromTo, dofHdrMaterial, 13);
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RenderTexture.ReleaseTemporary(temp2);
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}
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else {
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// capture full coc in alpha channel (fromTo is not read, but bound to detect screen flip)
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Graphics.Blit (fromTo, fromTo, dofHdrMaterial, 0);
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}
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}
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void OnRenderImage ( RenderTexture source , RenderTexture destination ){
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if(!CheckResources ()) {
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Graphics.Blit (source, destination);
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return;
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}
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// clamp & prepare values so they make sense
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if (aperture < 0.0f) aperture = 0.0f;
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if (maxBlurSize < 0.1f) maxBlurSize = 0.1f;
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focalSize = Mathf.Clamp(focalSize, 0.0f, 2.0f);
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internalBlurWidth = Mathf.Max(maxBlurSize, 0.0f);
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// focal & coc calculations
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focalDistance01 = (focalTransform) ? (GetComponent<Camera>().WorldToViewportPoint (focalTransform.position)).z / (GetComponent<Camera>().farClipPlane) : FocalDistance01 (focalLength);
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dofHdrMaterial.SetVector ("_CurveParams", new Vector4 (1.0f, focalSize, aperture/10.0f, focalDistance01));
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// possible render texture helpers
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RenderTexture rtLow = null;
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RenderTexture rtLow2 = null;
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RenderTexture rtSuperLow1 = null;
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RenderTexture rtSuperLow2 = null;
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float fgBlurDist = internalBlurWidth * foregroundOverlap;
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if(visualizeFocus)
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{
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//
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// 2.
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// visualize coc
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//
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//
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WriteCoc (source, true);
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Graphics.Blit (source, destination, dofHdrMaterial, 16);
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}
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else if ((blurType == BlurType.DX11) && dx11bokehMaterial)
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{
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//
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// 1.
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// optimized dx11 bokeh scatter
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//
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//
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if(highResolution) {
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internalBlurWidth = internalBlurWidth < 0.1f ? 0.1f : internalBlurWidth;
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fgBlurDist = internalBlurWidth * foregroundOverlap;
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rtLow = RenderTexture.GetTemporary (source.width, source.height, 0, source.format);
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var dest2= RenderTexture.GetTemporary (source.width, source.height, 0, source.format);
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// capture COC
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WriteCoc (source, false);
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// blur a bit so we can do a frequency check
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rtSuperLow1 = RenderTexture.GetTemporary(source.width>>1, source.height>>1, 0, source.format);
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rtSuperLow2 = RenderTexture.GetTemporary(source.width>>1, source.height>>1, 0, source.format);
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Graphics.Blit(source, rtSuperLow1, dofHdrMaterial, 15);
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dofHdrMaterial.SetVector ("_Offsets", new Vector4 (0.0f, 1.5f , 0.0f, 1.5f));
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Graphics.Blit (rtSuperLow1, rtSuperLow2, dofHdrMaterial, 19);
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dofHdrMaterial.SetVector ("_Offsets", new Vector4 (1.5f, 0.0f, 0.0f, 1.5f));
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Graphics.Blit (rtSuperLow2, rtSuperLow1, dofHdrMaterial, 19);
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// capture fg coc
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if(nearBlur)
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Graphics.Blit (source, rtSuperLow2, dofHdrMaterial, 4);
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dx11bokehMaterial.SetTexture ("_BlurredColor", rtSuperLow1);
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dx11bokehMaterial.SetFloat ("_SpawnHeuristic", dx11SpawnHeuristic);
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dx11bokehMaterial.SetVector ("_BokehParams", new Vector4(dx11BokehScale, dx11BokehIntensity, Mathf.Clamp(dx11BokehThreshhold, 0.005f, 4.0f), internalBlurWidth));
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dx11bokehMaterial.SetTexture ("_FgCocMask", nearBlur ? rtSuperLow2 : null);
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// collect bokeh candidates and replace with a darker pixel
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Graphics.SetRandomWriteTarget (1, cbPoints);
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Graphics.Blit (source, rtLow, dx11bokehMaterial, 0);
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Graphics.ClearRandomWriteTargets ();
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// fg coc blur happens here (after collect!)
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if(nearBlur) {
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dofHdrMaterial.SetVector ("_Offsets", new Vector4 (0.0f, fgBlurDist , 0.0f, fgBlurDist));
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Graphics.Blit (rtSuperLow2, rtSuperLow1, dofHdrMaterial, 2);
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dofHdrMaterial.SetVector ("_Offsets", new Vector4 (fgBlurDist, 0.0f, 0.0f, fgBlurDist));
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Graphics.Blit (rtSuperLow1, rtSuperLow2, dofHdrMaterial, 2);
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// merge fg coc with bg coc
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Graphics.Blit (rtSuperLow2, rtLow, dofHdrMaterial, 3);
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}
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// NEW: LAY OUT ALPHA on destination target so we get nicer outlines for the high rez version
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Graphics.Blit (rtLow, dest2, dofHdrMaterial, 20);
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// box blur (easier to merge with bokeh buffer)
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dofHdrMaterial.SetVector ("_Offsets", new Vector4 (internalBlurWidth, 0.0f , 0.0f, internalBlurWidth));
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Graphics.Blit (rtLow, source, dofHdrMaterial, 5);
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dofHdrMaterial.SetVector ("_Offsets", new Vector4 (0.0f, internalBlurWidth, 0.0f, internalBlurWidth));
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Graphics.Blit (source, dest2, dofHdrMaterial, 21);
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// apply bokeh candidates
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Graphics.SetRenderTarget (dest2);
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ComputeBuffer.CopyCount (cbPoints, cbDrawArgs, 0);
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dx11bokehMaterial.SetBuffer ("pointBuffer", cbPoints);
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dx11bokehMaterial.SetTexture ("_MainTex", dx11BokehTexture);
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dx11bokehMaterial.SetVector ("_Screen", new Vector3(1.0f/(1.0f*source.width), 1.0f/(1.0f*source.height), internalBlurWidth));
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dx11bokehMaterial.SetPass (2);
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Graphics.DrawProceduralIndirect (MeshTopology.Points, cbDrawArgs, 0);
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Graphics.Blit (dest2, destination); // hackaround for DX11 high resolution flipfun (OPTIMIZEME)
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RenderTexture.ReleaseTemporary(dest2);
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RenderTexture.ReleaseTemporary(rtSuperLow1);
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RenderTexture.ReleaseTemporary(rtSuperLow2);
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}
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else {
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rtLow = RenderTexture.GetTemporary (source.width>>1, source.height>>1, 0, source.format);
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rtLow2 = RenderTexture.GetTemporary (source.width>>1, source.height>>1, 0, source.format);
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fgBlurDist = internalBlurWidth * foregroundOverlap;
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// capture COC & color in low resolution
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WriteCoc (source, false);
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source.filterMode = FilterMode.Bilinear;
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Graphics.Blit (source, rtLow, dofHdrMaterial, 6);
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// blur a bit so we can do a frequency check
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rtSuperLow1 = RenderTexture.GetTemporary(rtLow.width>>1, rtLow.height>>1, 0, rtLow.format);
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rtSuperLow2 = RenderTexture.GetTemporary(rtLow.width>>1, rtLow.height>>1, 0, rtLow.format);
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Graphics.Blit(rtLow, rtSuperLow1, dofHdrMaterial, 15);
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dofHdrMaterial.SetVector ("_Offsets", new Vector4 (0.0f, 1.5f , 0.0f, 1.5f));
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Graphics.Blit (rtSuperLow1, rtSuperLow2, dofHdrMaterial, 19);
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dofHdrMaterial.SetVector ("_Offsets", new Vector4 (1.5f, 0.0f, 0.0f, 1.5f));
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Graphics.Blit (rtSuperLow2, rtSuperLow1, dofHdrMaterial, 19);
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RenderTexture rtLow3 = null;
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if(nearBlur) {
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// capture fg coc
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rtLow3 = RenderTexture.GetTemporary (source.width>>1, source.height>>1, 0, source.format);
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Graphics.Blit (source, rtLow3, dofHdrMaterial, 4);
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}
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dx11bokehMaterial.SetTexture ("_BlurredColor", rtSuperLow1);
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dx11bokehMaterial.SetFloat ("_SpawnHeuristic", dx11SpawnHeuristic);
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dx11bokehMaterial.SetVector ("_BokehParams", new Vector4(dx11BokehScale, dx11BokehIntensity, Mathf.Clamp(dx11BokehThreshhold, 0.005f, 4.0f), internalBlurWidth));
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dx11bokehMaterial.SetTexture ("_FgCocMask", rtLow3);
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// collect bokeh candidates and replace with a darker pixel
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Graphics.SetRandomWriteTarget (1, cbPoints);
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Graphics.Blit (rtLow, rtLow2, dx11bokehMaterial, 0);
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Graphics.ClearRandomWriteTargets ();
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RenderTexture.ReleaseTemporary(rtSuperLow1);
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RenderTexture.ReleaseTemporary(rtSuperLow2);
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// fg coc blur happens here (after collect!)
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if(nearBlur) {
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dofHdrMaterial.SetVector ("_Offsets", new Vector4 (0.0f, fgBlurDist , 0.0f, fgBlurDist));
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Graphics.Blit (rtLow3, rtLow, dofHdrMaterial, 2);
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dofHdrMaterial.SetVector ("_Offsets", new Vector4 (fgBlurDist, 0.0f, 0.0f, fgBlurDist));
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Graphics.Blit (rtLow, rtLow3, dofHdrMaterial, 2);
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// merge fg coc with bg coc
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Graphics.Blit (rtLow3, rtLow2, dofHdrMaterial, 3);
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}
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// box blur (easier to merge with bokeh buffer)
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dofHdrMaterial.SetVector ("_Offsets", new Vector4 (internalBlurWidth, 0.0f , 0.0f, internalBlurWidth));
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Graphics.Blit (rtLow2, rtLow, dofHdrMaterial, 5);
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dofHdrMaterial.SetVector ("_Offsets", new Vector4 (0.0f, internalBlurWidth, 0.0f, internalBlurWidth));
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Graphics.Blit (rtLow, rtLow2, dofHdrMaterial, 5);
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// apply bokeh candidates
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Graphics.SetRenderTarget (rtLow2);
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ComputeBuffer.CopyCount (cbPoints, cbDrawArgs, 0);
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dx11bokehMaterial.SetBuffer ("pointBuffer", cbPoints);
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dx11bokehMaterial.SetTexture ("_MainTex", dx11BokehTexture);
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dx11bokehMaterial.SetVector ("_Screen", new Vector3(1.0f/(1.0f*rtLow2.width), 1.0f/(1.0f*rtLow2.height), internalBlurWidth));
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dx11bokehMaterial.SetPass (1);
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Graphics.DrawProceduralIndirect (MeshTopology.Points, cbDrawArgs, 0);
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// upsample & combine
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dofHdrMaterial.SetTexture ("_LowRez", rtLow2);
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dofHdrMaterial.SetTexture ("_FgOverlap", rtLow3);
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dofHdrMaterial.SetVector ("_Offsets", ((1.0f*source.width)/(1.0f*rtLow2.width)) * internalBlurWidth * Vector4.one);
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Graphics.Blit (source, destination, dofHdrMaterial, 9);
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if(rtLow3) RenderTexture.ReleaseTemporary(rtLow3);
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}
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}
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else
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{
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//
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// 2.
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// poisson disc style blur in low resolution
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//
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//
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source.filterMode = FilterMode.Bilinear;
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if(highResolution) internalBlurWidth *= 2.0f;
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WriteCoc (source, true);
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rtLow = RenderTexture.GetTemporary (source.width >> 1, source.height >> 1, 0, source.format);
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rtLow2 = RenderTexture.GetTemporary (source.width >> 1, source.height >> 1, 0, source.format);
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int blurPass = (blurSampleCount == BlurSampleCount.High || blurSampleCount == BlurSampleCount.Medium) ? 17 : 11;
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if(highResolution) {
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dofHdrMaterial.SetVector ("_Offsets", new Vector4 (0.0f, internalBlurWidth, 0.025f, internalBlurWidth));
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Graphics.Blit (source, destination, dofHdrMaterial, blurPass);
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}
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else {
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dofHdrMaterial.SetVector ("_Offsets", new Vector4 (0.0f, internalBlurWidth, 0.1f, internalBlurWidth));
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// blur
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Graphics.Blit (source, rtLow, dofHdrMaterial, 6);
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Graphics.Blit (rtLow, rtLow2, dofHdrMaterial, blurPass);
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// cheaper blur in high resolution, upsample and combine
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dofHdrMaterial.SetTexture("_LowRez", rtLow2);
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dofHdrMaterial.SetTexture("_FgOverlap", null);
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dofHdrMaterial.SetVector ("_Offsets", Vector4.one * ((1.0f*source.width)/(1.0f*rtLow2.width)) * internalBlurWidth);
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Graphics.Blit (source, destination, dofHdrMaterial, blurSampleCount == BlurSampleCount.High ? 18 : 12);
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}
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}
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if(rtLow) RenderTexture.ReleaseTemporary(rtLow);
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if(rtLow2) RenderTexture.ReleaseTemporary(rtLow2);
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}
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}
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