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‎README.md‎

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@@ -27,49 +27,50 @@ To build and run the applications in the module, please follow the [instructions
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# Table of Contents
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30-
- [Tutorials](https://github.com/DiligentGraphics/DiligentSamples#tutorials)
31-
- [01 - Hello Triangle](https://github.com/DiligentGraphics/DiligentSamples#tutorial-01---hello-triangle)
32-
- [02 - Cube](https://github.com/DiligentGraphics/DiligentSamples#tutorial-02---cube)
33-
- [03 - Texturing](https://github.com/DiligentGraphics/DiligentSamples#tutorial-03---texturing)
34-
- [03 - Texturing-C](https://github.com/DiligentGraphics/DiligentSamples#tutorial-03---texturing-c)
35-
- [03 - Texturing-DotNet](https://github.com/DiligentGraphics/DiligentSamples#tutorial-03---texturing-dotnet)
36-
- [04 - Instancing](https://github.com/DiligentGraphics/DiligentSamples#tutorial-04---instancing)
37-
- [05 - Texture Array](https://github.com/DiligentGraphics/DiligentSamples#tutorial-05---texture-array)
38-
- [06 - Multithreading](https://github.com/DiligentGraphics/DiligentSamples#tutorial-06---multithreading)
39-
- [07 - Geometry Shader](https://github.com/DiligentGraphics/DiligentSamples#tutorial-07---geometry-shader)
40-
- [08 - Tessellation](https://github.com/DiligentGraphics/DiligentSamples#tutorial-08---tessellation)
41-
- [09 - Quads](https://github.com/DiligentGraphics/DiligentSamples#tutorial-09---quads)
42-
- [10 - Data Streaming](https://github.com/DiligentGraphics/DiligentSamples#tutorial-10---data-streaming)
43-
- [11 - Resource Updates](https://github.com/DiligentGraphics/DiligentSamples#tutorial-11---resource-updates)
44-
- [12 - Render Target](https://github.com/DiligentGraphics/DiligentSamples#tutorial-12---render-target)
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- [13 - Shadow Map](https://github.com/DiligentGraphics/DiligentSamples#tutorial-13---shadow-map)
46-
- [14 - Compute Shader](https://github.com/DiligentGraphics/DiligentSamples#tutorial-14---compute-shader)
47-
- [15 - Multiple Windows](https://github.com/DiligentGraphics/DiligentSamples#tutorial-15---multiple-windows)
48-
- [16 - Bindless Resources](https://github.com/DiligentGraphics/DiligentSamples#tutorial-16---bindless-resources)
49-
- [17 - MSAA](https://github.com/DiligentGraphics/DiligentSamples#tutorial-17---msaa)
50-
- [18 - Queries](https://github.com/DiligentGraphics/DiligentSamples#tutorial-18---queries)
51-
- [19 - Render Passes](https://github.com/DiligentGraphics/DiligentSamples#tutorial-19---render-passes)
52-
- [20 - Mesh Shader](https://github.com/DiligentGraphics/DiligentSamples#tutorial-20---mesh-shader)
53-
- [21 - Ray Tracing](https://github.com/DiligentGraphics/DiligentSamples#tutorial-21---ray-tracing)
54-
- [22 - Hybrid Rendering](https://github.com/DiligentGraphics/DiligentSamples#tutorial-22---hybrid-rendering)
55-
- [23 - Command Queues](https://github.com/DiligentGraphics/DiligentSamples#tutorial-23---command-queues)
56-
- [24 - Variable Rate Shading](https://github.com/DiligentGraphics/DiligentSamples#tutorial-24---variable-rate-shading)
57-
- [25 - Render State Packager](https://github.com/DiligentGraphics/DiligentSamples#tutorial-25---render-state-packager)
58-
- [26 - Render State Cache](https://github.com/DiligentGraphics/DiligentSamples#tutorial-26---render-state-cache)
59-
- [Samples](https://github.com/DiligentGraphics/DiligentSamples#samples)
60-
- [Atmospheric Light Scattering](https://github.com/DiligentGraphics/DiligentSamples#atmospheric-light-scattering-sample)
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- [GLFW Demo](https://github.com/DiligentGraphics/DiligentSamples#glfw-demo)
62-
- [GLTF Viewer](https://github.com/DiligentGraphics/DiligentSamples#gltf-viewer)
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- [USD Viewer](https://github.com/DiligentGraphics/DiligentSamples#usd-viewer)
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- [Shadows](https://github.com/DiligentGraphics/DiligentSamples#shadows)
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- [Dear ImGui Demo](https://github.com/DiligentGraphics/DiligentSamples#dear-imgui-demo)
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- [Nuklear Demo](https://github.com/DiligentGraphics/DiligentSamples#nuklear-demo)
67-
- [Hello AR](https://github.com/DiligentGraphics/DiligentSamples#hello-ar)
68-
- [Asteroids](https://github.com/DiligentGraphics/DiligentSamples#asteroids)
69-
- [Unity Plugin](https://github.com/DiligentGraphics/DiligentSamples#unity-plugin)
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- [Build and Run Instructions](https://github.com/DiligentGraphics/DiligentSamples#build-and-run-instructions)
71-
- [License](https://github.com/DiligentGraphics/DiligentSamples#license)
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- [Contributing](https://github.com/DiligentGraphics/DiligentSamples#contributing)
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- [Tutorials](#tutorials)
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- [01 - Hello Triangle](#tutorial-01---hello-triangle)
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- [02 - Cube](#tutorial-02---cube)
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- [03 - Texturing](#tutorial-03---texturing)
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- [03 - Texturing-C](#tutorial-03---texturing-c)
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- [03 - Texturing-DotNet](#tutorial-03---texturing-dotnet)
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- [04 - Instancing](#tutorial-04---instancing)
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- [05 - Texture Array](#tutorial-05---texture-array)
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- [06 - Multithreading](#tutorial-06---multithreading)
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- [07 - Geometry Shader](#tutorial-07---geometry-shader)
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- [08 - Tessellation](#tutorial-08---tessellation)
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- [09 - Quads](#tutorial-09---quads)
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- [10 - Data Streaming](#tutorial-10---data-streaming)
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- [11 - Resource Updates](#tutorial-11---resource-updates)
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- [12 - Render Target](#tutorial-12---render-target)
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- [13 - Shadow Map](#tutorial-13---shadow-map)
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- [14 - Compute Shader](#tutorial-14---compute-shader)
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- [15 - Multiple Windows](#tutorial-15---multiple-windows)
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- [16 - Bindless Resources](#tutorial-16---bindless-resources)
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- [17 - MSAA](#tutorial-17---msaa)
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- [18 - Queries](#tutorial-18---queries)
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- [19 - Render Passes](#tutorial-19---render-passes)
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- [20 - Mesh Shader](#tutorial-20---mesh-shader)
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- [21 - Ray Tracing](#tutorial-21---ray-tracing)
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- [22 - Hybrid Rendering](#tutorial-22---hybrid-rendering)
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- [23 - Command Queues](#tutorial-23---command-queues)
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- [24 - Variable Rate Shading](#tutorial-24---variable-rate-shading)
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- [25 - Render State Packager](#tutorial-25---render-state-packager)
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- [26 - Render State Cache](#tutorial-26---render-state-cache)
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- [27 - Post-Processing](#tutorial-27---post-processing)
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- [Samples](#samples)
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- [Atmospheric Light Scattering](#atmospheric-light-scattering-sample)
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- [GLFW Demo](#glfw-demo)
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- [GLTF Viewer](#gltf-viewer)
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- [USD Viewer](#usd-viewer)
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- [Shadows](#shadows)
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- [Dear ImGui Demo](#dear-imgui-demo)
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- [Nuklear Demo](#nuklear-demo)
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- [Hello AR](#hello-ar)
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- [Asteroids](#asteroids)
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- [Unity Plugin](#unity-plugin)
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- [Build and Run Instructions](#build-and-run-instructions)
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- [License](#license)
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- [Contributing](#contributing)
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# Tutorials
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![](Tutorials/Tutorial26_StateCache/Screenshot.jpg)
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## [Tutorial 27 - Post-Processing](https://github.com/DiligentGraphics/DiligentSamples/tree/master/Tutorials/Tutorial27_PostProcessing)
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This tutorial demonstrates how to use post-processing effects from the DiligentFX module.
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![](Tutorials/Tutorial27_PostProcessing/Screenshot.jpg)
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# Samples
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## [Atmospheric Light Scattering sample](Samples/Atmosphere)

‎Tutorials/CMakeLists.txt‎

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add_subdirectory(Tutorial25_StatePackager)
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add_subdirectory(Tutorial26_StateCache)
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endif()
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add_subdirectory(Tutorial27_PostProcessing)

‎Tutorials/Tutorial27_PostProcessing/.gitignore‎

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assets/textures/papermill.ktx

‎Tutorials/Tutorial27_PostProcessing/CMakeLists.txt‎

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cmake_minimum_required (VERSION 3.6)
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project(Tutorial27_PostProcessing CXX)
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file(COPY ../../Samples/GLTFViewer/assets/textures/papermill.ktx DESTINATION ${CMAKE_CURRENT_SOURCE_DIR}/assets/textures)
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set(SOURCE
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src/Tutorial27_PostProcessing.cpp
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../Common/src/TexturedCube.cpp
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)
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set(INCLUDE
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src/Tutorial27_PostProcessing.hpp
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../Common/src/TexturedCube.hpp
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)
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set(SHADERS
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assets/shaders/GeometryStructures.fxh
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assets/shaders/GenerateGeometry.vsh
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assets/shaders/GenerateGeometry.psh
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assets/shaders/ComputeLighting.fx
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assets/shaders/ApplyToneMap.fx
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)
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set(TEXTURES
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assets/textures/papermill.ktx
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)
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set(ASSETS
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${TEXTURES}
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)
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set(ALL_SHADERS ${SHADERS})
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add_sample_app("Tutorial27_PostProcessing" "DiligentSamples/Tutorials" "${SOURCE}" "${INCLUDE}" "${ALL_SHADERS}" "${ASSETS}")
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target_link_libraries(Tutorial27_PostProcessing PRIVATE DiligentFX)
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if (PLATFORM_WIN32 AND GL_SUPPORTED)
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target_link_libraries(Tutorial27_PostProcessing PRIVATE Diligent-GLAdapterSelector)
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endif()
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set_source_files_properties(${ALL_SHADERS} PROPERTIES
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VS_DEPLOYMENT_LOCATION "shaders"
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MACOSX_PACKAGE_LOCATION Resources/shaders
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)
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set_source_files_properties(${TEXTURES} PROPERTIES
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VS_DEPLOYMENT_LOCATION "textures"
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MACOSX_PACKAGE_LOCATION "Resources/textures"
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)
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source_group(TREE ${CMAKE_CURRENT_SOURCE_DIR}/assets PREFIX Assets FILES ${ASSETS} ${SHADERS})

‎Tutorials/Tutorial27_PostProcessing/Screenshot.jpg‎

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‎Tutorials/Tutorial27_PostProcessing/assets/shaders/ApplyToneMap.fx‎

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#include "FullScreenTriangleVSOutput.fxh"
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#include "PBR_Structures.fxh"
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#include "ToneMapping.fxh"
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#include "SRGBUtilities.fxh"
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cbuffer cbPBRRendererAttibs
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{
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PBRRendererShaderParameters g_PBRRendererAttibs;
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}
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Texture2D<float3> g_TextureHDR;
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float4 ApplyToneMapPS(FullScreenTriangleVSOutput VSOut) : SV_Target0
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{
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ToneMappingAttribs TMAttribs;
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TMAttribs.iToneMappingMode = TONE_MAPPING_MODE;
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TMAttribs.bAutoExposure = false;
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TMAttribs.fMiddleGray = g_PBRRendererAttibs.MiddleGray;
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TMAttribs.bLightAdaptation = false;
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TMAttribs.fWhitePoint = g_PBRRendererAttibs.WhitePoint;
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TMAttribs.fLuminanceSaturation = 1.0;
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float3 HDRColor = g_TextureHDR.Load(int3(VSOut.f4PixelPos.xy, 0));
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float3 SDRColor = ToneMap(HDRColor, TMAttribs, g_PBRRendererAttibs.AverageLogLum);
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#if CONVERT_OUTPUT_TO_SRGB
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SDRColor = FastLinearToSRGB(SDRColor);
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#endif
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return float4(SDRColor, 1.0);
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}

‎Tutorials/Tutorial27_PostProcessing/assets/shaders/ComputeLighting.fx‎

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#include "BasicStructures.fxh"
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#include "PBR_Structures.fxh"
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#include "FullScreenTriangleVSOutput.fxh"
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#define FLT_EPS 5.960464478e-8
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cbuffer cbCameraAttribs
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{
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CameraAttribs g_Camera;
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}
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cbuffer cbPBRRendererAttibs
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{
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PBRRendererShaderParameters g_PBRRendererAttibs;
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}
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Texture2D<float3> g_TextureBaseColor;
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Texture2D<float2> g_TextureMaterialData;
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Texture2D<float4> g_TextureNormal;
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Texture2D<float> g_TextureDepth;
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Texture2D<float4> g_TextureSSR;
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TextureCube<float3> g_TextureEnvironmentMap;
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SamplerState g_TextureEnvironmentMap_sampler;
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TextureCube<float3> g_TextureIrradianceMap;
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SamplerState g_TextureIrradianceMap_sampler;
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TextureCube<float3> g_TexturePrefilteredEnvironmentMap;
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SamplerState g_TexturePrefilteredEnvironmentMap_sampler;
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Texture2D<float2> g_TextureBRDFIntegrationMap;
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SamplerState g_TextureBRDFIntegrationMap_sampler;
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struct SurfaceInformation
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{
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float3 BaseColor;
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float Roughness;
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float Metalness;
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float3 Normal;
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};
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float3 FresnelSchlickRoughness(float CosTheta, float3 F0, float roughness)
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{
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float Alpha = 1.0 - roughness;
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return F0 + (max(float3(Alpha, Alpha, Alpha), F0) - F0) * pow(clamp(1.0 - CosTheta, 0.0, 1.0), 5.0);
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}
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float3 SampleEnvironmentMap(float3 Coord)
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{
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return g_PBRRendererAttibs.IBLScale * g_TextureEnvironmentMap.SampleLevel(g_TextureEnvironmentMap_sampler, float3(+1.0, -1.0, +1.0) * Coord, 0.5);
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}
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float3 SampleIrradianceMap(float3 Coord)
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{
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return g_PBRRendererAttibs.IBLScale * g_TextureIrradianceMap.Sample(g_TextureIrradianceMap_sampler, float3(+1.0, -1.0, +1.0) * Coord);
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}
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float3 SamplePrefilteredEnvironmentMap(float3 Coord, float MipLevel)
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{
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return g_PBRRendererAttibs.IBLScale * g_TexturePrefilteredEnvironmentMap.SampleLevel(g_TexturePrefilteredEnvironmentMap_sampler, float3(+1.0, -1.0, +1.0) * Coord, MipLevel);
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}
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float2 SampleBRDFIntegrationMap(float2 Coord)
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{
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return g_TextureBRDFIntegrationMap.Sample(g_TextureBRDFIntegrationMap_sampler, Coord);
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}
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float3 ComputeDiffuseIBL(float3 N)
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{
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return SampleIrradianceMap(N);
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}
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float3 ComputeSpecularIBL(float2 Location, float3 F0, float3 N, float3 V, float Roughness)
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{
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float NdotV = saturate(dot(N, V));
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float3 R = reflect(-V, N);
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float2 BRDF_LUT = SampleBRDFIntegrationMap(float2(NdotV, Roughness));
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float4 SSR = g_TextureSSR.Load(int3(Location, 0));
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float3 T1 = SamplePrefilteredEnvironmentMap(R, Roughness * g_PBRRendererAttibs.PrefilteredCubeMipLevels);
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float3 T2 = (F0 * BRDF_LUT.x + BRDF_LUT.yyy);
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return lerp(T1, SSR.rgb, SSR.w * g_Camera.f4ExtraData[0].w) * T2;
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}
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SurfaceInformation ExtractGBuffer(FullScreenTriangleVSOutput VSOut)
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{
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float2 MaterialData = g_TextureMaterialData.Load(int3(VSOut.f4PixelPos.xy, 0));
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SurfaceInformation Information;
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Information.BaseColor = g_TextureBaseColor.Load(int3(VSOut.f4PixelPos.xy, 0));
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Information.Roughness = MaterialData.x;
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Information.Metalness = MaterialData.y;
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Information.Normal = normalize(g_TextureNormal.Load(int3(VSOut.f4PixelPos.xy, 0)).xyz);
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return Information;
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}
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float3 CreateViewDir(float2 NormalizedXY)
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{
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float4 RayStart = mul(float4(NormalizedXY, DepthToNormalizedDeviceZ(0.0), 1.0f), g_Camera.mViewProjInv);
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float4 RayEnd = mul(float4(NormalizedXY, DepthToNormalizedDeviceZ(1.0), 1.0f), g_Camera.mViewProjInv);
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RayStart.xyz /= RayStart.w;
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RayEnd.xyz /= RayEnd.w;
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return normalize(RayStart.xyz - RayEnd.xyz);;
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}
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float4 ComputeLightingPS(FullScreenTriangleVSOutput VSOut) : SV_Target0
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{
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float Depth = g_TextureDepth.Load(int3(VSOut.f4PixelPos.xy, 0));
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float3 ViewDir = CreateViewDir(VSOut.f2NormalizedXY);
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if (Depth >= 1.0 - FLT_EPS)
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return float4(SampleEnvironmentMap(-ViewDir), 1.0);
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SurfaceInformation SurfInfo = ExtractGBuffer(VSOut);
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float3 F0 = lerp(float3(0.04, 0.04, 0.04), SurfInfo.BaseColor, SurfInfo.Metalness);
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float3 F = FresnelSchlickRoughness(saturate(dot(SurfInfo.Normal, ViewDir)), F0, SurfInfo.Roughness);
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float3 kS = F;
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float3 kD = (float3(1.0, 1.0, 1.0) - kS) * (1.0 - SurfInfo.Metalness);
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float3 Diffuse = SurfInfo.BaseColor * ComputeDiffuseIBL(SurfInfo.Normal);
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float3 Specular = ComputeSpecularIBL(VSOut.f4PixelPos.xy, F0, SurfInfo.Normal, ViewDir, SurfInfo.Roughness);
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return float4(kD * Diffuse + Specular, 1.0);
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}

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