OutlineShared.hlsl

// This file is just some shared placeholder attributes and varyings for Outline Post Process

// I've included some informative comments from Colin Leung's example URPToonLitShader which has some interesting organization.
// https://github.com/ColinLeung-NiloCat/UnityURPToonLitShaderExample/blob/master/SimpleURPToonLitOutlineExample_Shared.hlsl

// #pragma once is a safe guard best practice in almost every .hlsl (need Unity2020 or up),
// doing this can make sure your .hlsl's user can include this .hlsl anywhere anytime without producing any multi include conflict
#pragma once

// We don't have "UnityCG.cginc" in SRP/URP's package anymore, so:
// Including the following two hlsl files is enough for shading with Universal Pipeline. Everything is included in them.
// Core.hlsl will include SRP shader library, all constant buffers not related to materials (perobject, percamera, perframe).
// It also includes matrix/space conversion functions and fog.
// Lighting.hlsl will include the light functions/data to abstract light constants. You should use GetMainLight and GetLight functions
// that initialize Light struct. Lighting.hlsl also include GI, Light BDRF functions. It also includes Shadows.

// Required by all Universal Render Pipeline shaders.
// It will include Unity built-in shader variables (except the lighting variables)
// (https://docs.unity3d.com/Manual/SL-UnityShaderVariables.html
// It will also include many utilitary functions.
#include "Packages/com.unity.render-pipelines.universal/ShaderLibrary/Core.hlsl"

// Include this if you are doing a lit shader. This includes lighting shader variables,
// lighting and shadow functions
#include "Packages/com.unity.render-pipelines.universal/ShaderLibrary/Lighting.hlsl"

struct Attributes
{
    float4 positionOS : POSITION;
    float2 uv : TEXCOORD0;
};

struct Varyings
{
    float4 positionHCS : SV_POSITION;
    float2 uv : TEXCOORD0;
};