vault backup: 2025-01-19 22:02:41

03-UnrealEngine/卡通渲染相关资料/渲染功能/PostProcess/Toon ToneMapping.md

@@ -0,0 +1,7 @@
+---
+title: Toon ToneMapping
+date: 2025-01-19 21:02:19
+excerpt: 
+tags: 
+rating: ⭐
+---

03-UnrealEngine/卡通渲染相关资料/渲染功能/PostProcess/ToonPostProcess.md

@@ -124,4 +124,59 @@ BEGIN_SHADER_PARAMETER_STRUCT(FSceneTextureShaderParameters, ENGINE_API)
     SHADER_PARAMETER_RDG_UNIFORM_BUFFER(FSceneTextureUniformParameters, SceneTextures)  
     SHADER_PARAMETER_RDG_UNIFORM_BUFFER(FMobileSceneTextureUniformParameters, MobileSceneTextures)  
 END_SHADER_PARAMETER_STRUCT()
-```
+```
+
+
+
+# ToneMapping
+- UE4/UE5和ACES工作流程:https://zhuanlan.zhihu.com/p/660965710
+
+TonemapCommon.ush中的FilmToneMap()在CombineLUTsCommon()中调用。其顺序为：
+1. AddCombineLUTPass() => PostProcessCombineLUTs.usf
+2. AddTonemapPass() => PostProcessTonemap.usf
+
+```c++
+void AddPostProcessingPasses()
+{
+...
+	{
+		FRDGTextureRef ColorGradingTexture = nullptr;
+
+		if (bPrimaryView)
+		{
+			ColorGradingTexture = AddCombineLUTPass(GraphBuilder, View);
+		}
+		// We can re-use the color grading texture from the primary view.
+		else if (View.GetTonemappingLUT())
+		{
+			ColorGradingTexture = TryRegisterExternalTexture(GraphBuilder, View.GetTonemappingLUT());
+		}
+		else
+		{
+			const FViewInfo* PrimaryView = static_cast<const FViewInfo*>(View.Family->Views[0]);
+			ColorGradingTexture = TryRegisterExternalTexture(GraphBuilder, PrimaryView->GetTonemappingLUT());
+		}
+
+		FTonemapInputs PassInputs;
+		PassSequence.AcceptOverrideIfLastPass(EPass::Tonemap, PassInputs.OverrideOutput);
+		PassInputs.SceneColor = SceneColorSlice;
+		PassInputs.Bloom = Bloom;
+		PassInputs.SceneColorApplyParamaters = SceneColorApplyParameters;
+		PassInputs.LocalExposureTexture = LocalExposureTexture;
+		PassInputs.BlurredLogLuminanceTexture = LocalExposureBlurredLogLumTexture;
+		PassInputs.LocalExposureParameters = &LocalExposureParameters;
+		PassInputs.EyeAdaptationParameters = &EyeAdaptationParameters;
+		PassInputs.EyeAdaptationBuffer = EyeAdaptationBuffer;
+		PassInputs.ColorGradingTexture = ColorGradingTexture;
+		PassInputs.bWriteAlphaChannel = AntiAliasingMethod == AAM_FXAA || bProcessSceneColorAlpha;
+		PassInputs.bOutputInHDR = bTonemapOutputInHDR;
+
+		SceneColor = AddTonemapPass(GraphBuilder, View, PassInputs);
+	}
+...
+}
+```
+
+## PostProcessCombineLUTs.usf
+
+## PostProcessTonemap.usf