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wip: Main postprocess

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This commit is contained in:
Alexandre Coirier
2026-05-25 17:50:44 +02:00
parent 0710f59b9d
commit 0405f337cd
17 changed files with 1336 additions and 88 deletions
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Assets/_Content/Shaders/Postprocess/BlurFullscreen.shadergraph
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Assets/_Content/Shaders/Postprocess/BlurFullscreen.shadergraph.meta
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Assets/_Content/Shaders/Postprocess/BlurRendererFeature.cs
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using UnityEngine;
using UnityEngine.Rendering;
using UnityEngine.Rendering.Universal;
using UnityEngine.Rendering.RenderGraphModule;
public class BlurRendererFeature : ScriptableRendererFeature
{
[System.Serializable]
public class Settings
{
[Range(0f, 0.2f)] public float blurRadius = 0.02f;
[Range(0f, 1f)] public float glowThreshold = 0.6f;
[Range(0f, 2f)] public float glowIntensity = 0f;
public Material blurHorizontal;
public Material blurVertical;
}
public Settings settings = new Settings();
BlurPass horizontalPass;
BlurPass verticalPass;
CopyToRTPass copyPass;
RenderTexture blurRT;
RTHandle blurRTHandle;
static readonly int BlurTexID = Shader.PropertyToID("_BlurredTexture");
static readonly int BlurRadiusID = Shader.PropertyToID("_BlurRadius");
static readonly int GlowThresholdID = Shader.PropertyToID("_GlowThreshold");
static readonly int GlowIntensityID = Shader.PropertyToID("_GlowIntensity");
static readonly int BlurSourceID = Shader.PropertyToID("_BlurSource");
public override void Create()
{
horizontalPass = new BlurPass("Blur Horizontal", RenderPassEvent.BeforeRenderingPostProcessing);
verticalPass = new BlurPass("Blur Vertical", RenderPassEvent.BeforeRenderingPostProcessing);
copyPass = new CopyToRTPass(RenderPassEvent.BeforeRenderingPostProcessing);
}
public override void AddRenderPasses(ScriptableRenderer renderer, ref RenderingData renderingData)
{
if (settings.blurHorizontal == null || settings.blurVertical == null) return;
var desc = renderingData.cameraData.cameraTargetDescriptor;
if (blurRT != null && (blurRT.width != desc.width / 2 || blurRT.height != desc.height / 2))
{
blurRT.Release();
blurRTHandle?.Release();
blurRT = null;
blurRTHandle = null;
}
if (blurRT == null)
{
blurRT = new RenderTexture(desc.width / 4, desc.height / 4, 0, RenderTextureFormat.DefaultHDR);
blurRT.Create();
blurRTHandle = RTHandles.Alloc(blurRT);
Shader.SetGlobalTexture(BlurTexID, blurRT);
}
Shader.SetGlobalFloat(BlurRadiusID, settings.blurRadius);
Shader.SetGlobalFloat(GlowThresholdID, settings.glowThreshold);
Shader.SetGlobalFloat(GlowIntensityID, settings.glowIntensity);
horizontalPass.Setup(settings.blurHorizontal);
renderer.EnqueuePass(horizontalPass);
verticalPass.Setup(settings.blurVertical);
renderer.EnqueuePass(verticalPass);
copyPass.Setup(blurRTHandle);
renderer.EnqueuePass(copyPass);
}
protected override void Dispose(bool disposing)
{
if (blurRT != null)
{
blurRT.Release();
blurRT = null;
}
blurRTHandle?.Release();
blurRTHandle = null;
}
class BlurPass : ScriptableRenderPass
{
string passName;
Material material;
static readonly int BlurSourceID = Shader.PropertyToID("_BlurSource");
public BlurPass(string name, RenderPassEvent evt)
{
passName = name;
renderPassEvent = evt;
}
public void Setup(Material mat) => material = mat;
class PassData
{
public TextureHandle source;
public Material material;
}
public override void RecordRenderGraph(RenderGraph renderGraph, ContextContainer frameData)
{
var resourceData = frameData.Get<UniversalResourceData>();
var srcDesc = renderGraph.GetTextureDesc(resourceData.activeColorTexture);
srcDesc.name = passName + " Temp";
srcDesc.clearBuffer = false;
var tempHandle = renderGraph.CreateTexture(srcDesc);
using (var builder = renderGraph.AddRasterRenderPass<PassData>(passName + " Blit", out var passData))
{
passData.source = resourceData.activeColorTexture;
passData.material = material;
builder.UseTexture(passData.source, AccessFlags.Read);
builder.SetRenderAttachment(tempHandle, 0, AccessFlags.Write);
builder.AllowGlobalStateModification(true);
builder.SetRenderFunc((PassData data, RasterGraphContext ctx) =>
{
ctx.cmd.SetGlobalTexture(BlurSourceID, data.source);
Blitter.BlitTexture(ctx.cmd, data.source, new Vector4(1, 1, 0, 0), data.material, 0);
});
}
using (var builder = renderGraph.AddRasterRenderPass<PassData>(passName + " Restore", out var passData))
{
passData.source = tempHandle;
builder.UseTexture(passData.source, AccessFlags.Read);
builder.SetRenderAttachment(resourceData.activeColorTexture, 0, AccessFlags.Write);
builder.SetRenderFunc((PassData data, RasterGraphContext ctx) =>
{
Blitter.BlitTexture(ctx.cmd, data.source, new Vector4(1, 1, 0, 0), 0, false);
});
}
}
}
class CopyToRTPass : ScriptableRenderPass
{
RTHandle targetHandle;
public CopyToRTPass(RenderPassEvent evt) => renderPassEvent = evt;
public void Setup(RTHandle handle) => targetHandle = handle;
class CopyPassData { public TextureHandle source; }
public override void RecordRenderGraph(RenderGraph renderGraph, ContextContainer frameData)
{
var resourceData = frameData.Get<UniversalResourceData>();
var destHandle = renderGraph.ImportTexture(targetHandle);
using (var builder = renderGraph.AddRasterRenderPass<CopyPassData>("Copy Blur To RT", out var passData))
{
passData.source = resourceData.activeColorTexture;
builder.UseTexture(passData.source, AccessFlags.Read);
builder.SetRenderAttachment(destHandle, 0, AccessFlags.Write);
builder.SetRenderFunc((CopyPassData data, RasterGraphContext ctx) =>
{
Blitter.BlitTexture(ctx.cmd, data.source, new Vector4(1, 1, 0, 0), 0, false);
});
}
}
}
}
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Assets/_Content/Shaders/Postprocess/EnkiBillalFullscreen.hlsl
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#ifndef ENKI_BILLAL_FULLSCREEN_INCLUDED
#define ENKI_BILLAL_FULLSCREEN_INCLUDED
#include "Assets/_Content/Shaders/Include/Noises.hlsl"
#include "Packages/com.unity.render-pipelines.universal/ShaderLibrary/DeclareOpaqueTexture.hlsl"
// Gaussian blur on scene color
// blurRadius controls the spread in pixels — adjust to taste
float3 SampleSceneColorBlurred(float2 uv, float blurRadius)
{
float3 result = 0;
float totalWeight = 0;
// Gaussian weights for 5 samples (sigma ~ 1.0)
float weights[5] = { 0.0625, 0.25, 0.375, 0.25, 0.0625 };
float offsets[5] = { -2, -1, 0, 1, 2 };
float2 texelSize = blurRadius / _ScreenParams.xy;
// Horizontal pass
for (int i = 0; i < 5; i++)
{
float2 offsetUV = uv + float2(offsets[i] * texelSize.x, 0);
result += SAMPLE_TEXTURE2D_X(_CameraOpaqueTexture, sampler_LinearClamp, offsetUV).rgb * weights[i];
}
return result;
}
void EnkiBillalFullscreen_float
(
float2 UV,
out float3 Output
)
{
float2 screenUV = UV;
// DEPTH
float rawDepth = SampleSceneDepth(screenUV);
float depthMeters = LinearEyeDepth(rawDepth, _ZBufferParams); // linear eye-space depth in metres
float depth01 = Linear01Depth(rawDepth, _ZBufferParams); // normalised linear depth [0..1]
// POSITION WORLD SPACE
// Remap depth for non-reversed-Z platforms before reconstruction
float depthForReconstruct = rawDepth;
#if !UNITY_REVERSED_Z
depthForReconstruct = lerp(UNITY_NEAR_CLIP_VALUE, 1.0, rawDepth);
#endif
// ComputeWorldSpacePosition handles perspective divide and platform differences
float3 positionWS = ComputeWorldSpacePosition(screenUV, depthForReconstruct, UNITY_MATRIX_I_VP);
// NORMAL WORLD SPACE
// Requires DepthNormals PrePass to be enabled in the URP Renderer
float3 normalWS = SampleSceneNormals(screenUV);
// SCENE COLOR
float3 originColor = SampleSceneColor(screenUV);
float greyscale = (originColor.x + originColor.y + originColor.z) / 3.0;
float3 offsetUV = PerlinColor3D(positionWS * float3(1, 5, 1), 1) * smoothstep(smoothstep(20, 3, depthMeters), 1, greyscale) * .1 / depthMeters;
float3 sceneColor = SampleSceneColor(screenUV + offsetUV);
//float3 sceneColor = SAMPLE_TEXTURE2D_X(_CameraOpaqueTexture, sampler_PointClamp, screenUV).rgb;
// OUTPUT
Output = SampleSceneColorBlurred(screenUV, 10);
}
#endif
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Assets/_Content/Shaders/Postprocess/Include/BlurFullscreen.hlsl
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#ifndef BLUR_FULLSCREEN_INCLUDED
#define BLUR_FULLSCREEN_INCLUDED
#include "Packages/com.unity.render-pipelines.universal/ShaderLibrary/DeclareDepthTexture.hlsl"
#include "Packages/com.unity.render-pipelines.universal/ShaderLibrary/DeclareOpaqueTexture.hlsl"
float _BlurRadius;
float _GlowThreshold;
float _GlowIntensity;
TEXTURE2D_X(_BlurSource);
SAMPLER(sampler_BlurSource);
float4 _BlurSource_TexelSize;
float Hash(float2 p)
{
return frac(sin(dot(p, float2(127.1, 311.7))) * 43758.5453);
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float3 ApplyGlowThreshold(float3 color)
{
float luminance = dot(color, float3(0.2126, 0.7152, 0.0722));
float mask = smoothstep(_GlowThreshold, _GlowThreshold + 0.3, luminance);
return color * mask;
}
void Blur_float
(
float2 UV,
bool IsVertical,
out float3 Output
)
{
float rawDepth = SampleSceneDepth(UV);
float depthMeters = LinearEyeDepth(rawDepth, _ZBufferParams);
float depthFactor = smoothstep(3, 20, depthMeters);
float stepY = (_BlurRadius * depthFactor) / 6.0;
float stepX = stepY * (_BlurSource_TexelSize.w / _BlurSource_TexelSize.z);
float jitter = (Hash(UV * _BlurSource_TexelSize.zw) - 0.5) * _BlurRadius * depthFactor * 20.0;
float2 dir = IsVertical ? float2(0.0, stepY) : float2(stepX, 0.0);
const int TAPS = 13;
const float offsets[13] = { -6.0, -4.7, -3.2, -2.1, -1.2, -0.4, 0.0, 0.4, 1.2, 2.1, 3.2, 4.7, 6.0 };
const float weights[13] =
{
0.00650, 0.02981, 0.07810, 0.14624, 0.22230, 0.27240,
0.29000,
0.27240, 0.22230, 0.14624, 0.07810, 0.02981, 0.00650
};
float3 centerColor = SAMPLE_TEXTURE2D_X(_BlurSource, sampler_BlurSource, UV).rgb;
float3 result = float3(0.0, 0.0, 0.0);
float totalWeight = 0.0;
for (int i = 0; i < TAPS; i++)
{
float2 offsetUV = UV + dir * (offsets[i] + jitter);
float tapRawDepth = SampleSceneDepth(offsetUV);
float tapDepth = LinearEyeDepth(tapRawDepth, _ZBufferParams);
float depthDiff = abs(tapDepth - depthMeters);
float depthWeight = exp(-depthDiff * 0.5);
float sw = weights[i] * depthWeight;
float3 tapColor = SAMPLE_TEXTURE2D_X(_BlurSource, sampler_BlurSource, offsetUV).rgb;
// GlowIntensity = 0 → full color blur, GlowIntensity = 1 → bright pixels only
float3 contribution = lerp(tapColor, ApplyGlowThreshold(tapColor), saturate(_GlowIntensity));
result += contribution * sw;
totalWeight += sw;
}
float3 center = lerp(centerColor, ApplyGlowThreshold(centerColor), saturate(_GlowIntensity));
// Scene color for additive glow compositing
float3 sceneColor = SAMPLE_TEXTURE2D_X(_CameraOpaqueTexture, sampler_LinearClamp, UV).rgb;
float3 blurred = totalWeight > 0.01 ? result / totalWeight : center;
// GlowIntensity = 0 → pure blur, GlowIntensity > 0 → scene + additive glow
Output = lerp(blurred, sceneColor + blurred, saturate(_GlowIntensity));
}
#endif
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Assets/_Content/Shaders/Postprocess/Include/EnkiBillalFullscreen.hlsl
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#ifndef ENKI_BILLAL_FULLSCREEN_INCLUDED
#define ENKI_BILLAL_FULLSCREEN_INCLUDED
#include "Assets/_Content/Shaders/Include/Noises.hlsl"
#include "Packages/com.unity.render-pipelines.universal/ShaderLibrary/DeclareOpaqueTexture.hlsl"
#include "Assets/_Content/Shaders/Postprocess/Include/BlurFullscreen.hlsl"
TEXTURE2D_X(_BlurredTexture);
SAMPLER(sampler_BlurredTexture);
// ─── OUTLINE ────────────────────────────────────────────────────────────────
// Width is expressed as a fraction of screen height.
// Both depth discontinuities and normal discontinuities contribute.
float ComputeOutline(float2 uv, float outlineWidthPx, float depthThreshold, float normalThreshold)
{
// Pixel size in UV space, scaled by desired width
float2 texel = outlineWidthPx / float2(_ScreenParams.x, _ScreenParams.y);
// ── Sample depth at 4 neighbours (Roberts Cross pattern) ────────────────
float d0 = LinearEyeDepth(SampleSceneDepth(uv + float2(texel.x, texel.y)), _ZBufferParams);
float d1 = LinearEyeDepth(SampleSceneDepth(uv + float2(-texel.x, texel.y)), _ZBufferParams);
float d2 = LinearEyeDepth(SampleSceneDepth(uv + float2(texel.x, -texel.y)), _ZBufferParams);
float d3 = LinearEyeDepth(SampleSceneDepth(uv + float2(-texel.x, -texel.y)), _ZBufferParams);
// Roberts Cross gradient magnitude on depth
float depthEdge = sqrt(pow(d0 - d3, 2) + pow(d1 - d2, 2));
// Normalise by depth so far geometry doesn't get thick outlines
float dCenter = LinearEyeDepth(SampleSceneDepth(uv), _ZBufferParams);
depthEdge /= (dCenter + 1e-4);
// ── Sample normals at the same 4 neighbours ──────────────────────────────
float3 n0 = SampleSceneNormals(uv + float2(texel.x, texel.y));
float3 n1 = SampleSceneNormals(uv + float2(-texel.x, texel.y));
float3 n2 = SampleSceneNormals(uv + float2(texel.x, -texel.y));
float3 n3 = SampleSceneNormals(uv + float2(-texel.x, -texel.y));
// Dot-product difference: 0 = identical normals, 1 = orthogonal / flipped
float normalEdge = 0;
normalEdge += 1.0 - saturate(dot(n0, n3));
normalEdge += 1.0 - saturate(dot(n1, n2));
normalEdge *= 0.5;
// ── Combine and threshold ────────────────────────────────────────────────
float edge = max(
step(depthThreshold, depthEdge),
step(normalThreshold, normalEdge)
);
return edge;
}
void EnkiBillalFullscreen_float
(
float2 UV,
float Test,
out float3 Output
)
{
float2 screenUV = UV;
// DEPTH
float rawDepth = SampleSceneDepth(screenUV);
float depthMeters = LinearEyeDepth(rawDepth, _ZBufferParams); // linear eye-space depth in metres
float depth01 = Linear01Depth(rawDepth, _ZBufferParams); // normalised linear depth [0..1]
// POSITION WORLD SPACE
// Remap depth for non-reversed-Z platforms before reconstruction
float depthForReconstruct = rawDepth;
#if !UNITY_REVERSED_Z
depthForReconstruct = lerp(UNITY_NEAR_CLIP_VALUE, 1.0, rawDepth);
#endif
// ComputeWorldSpacePosition handles perspective divide and platform differences
float3 positionWS = ComputeWorldSpacePosition(screenUV, depthForReconstruct, UNITY_MATRIX_I_VP);
// NORMAL WORLD SPACE
// Requires DepthNormals PrePass to be enabled in the URP Renderer
float3 normalWS = SampleSceneNormals(screenUV);
// SCENE COLOR
float3 originColor = SampleSceneColor(screenUV);
float3 sceneColorBlurred = SAMPLE_TEXTURE2D_X(_BlurredTexture, sampler_BlurredTexture, screenUV).rgb;
float greyscale = (originColor.x + originColor.y + originColor.z);
float greyscaleBlurred = (sceneColorBlurred.x + sceneColorBlurred.y + sceneColorBlurred.z);
float hilightMask = smoothstep(.7, 1, greyscale);
hilightMask = lerp(hilightMask, smoothstep(.7, 1, greyscaleBlurred), .5);
hilightMask *= pow(smoothstep(3, 20, depthMeters), 2);
float offsetMask = hilightMask;
float3 offset3D = PerlinColor3D(positionWS * float3(1, 6, 1), 1);
offset3D = smoothstep(.45, .55, offset3D);
float3 offsetUV = offset3D * offsetMask * .4 / depthMeters;
float3 sceneColor = SampleSceneColor(screenUV + offsetUV);
sceneColor = lerp(sceneColor, sceneColorBlurred, hilightMask);
sceneColor = lerp(sceneColor, originColor, .5);
sceneColor = lerp(sceneColor * .5, sceneColor * 1, hilightMask);
//float3 sceneColor = SAMPLE_TEXTURE2D_X(_CameraOpaqueTexture, sampler_PointClamp, screenUV).rgb;
// OUTLINE
float OutlineWidthPx = max(PerlinNoise3D(positionWS, 1) * 3 - 1, 0);
float OutlineDepthThreshold = .03;
float OutlineNormalThreshold = .35;
float OutlineColor = float3(0, 0, 0);
// Width is normalised to screen height so it stays consistent at any resolution.
float widthInPixels = OutlineWidthPx * (_ScreenParams.y / 1080.0);
float outline = ComputeOutline(screenUV, widthInPixels, OutlineDepthThreshold, OutlineNormalThreshold);
sceneColor = lerp(sceneColor, OutlineColor, outline);
// OUTPUT
Output = sceneColor; //BlurSceneColor(screenUV, .1);
//Output = offsetMask;
//Output = hilightMask; //BlurSceneColor(screenUV, .1);
//Output = lerp(originColor, sceneColorBlurred, smoothstep(3, 20, depthMeters));
}
#endif
Assets/_Content/Shaders/Postprocess/EnkiBillalFullscreen.hlsl.meta → Assets/_Content/Shaders/Postprocess/Include/EnkiBillalFullscreen.hlsl.meta
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