Shader "HDRenderPipeline/Decal"
{
    Properties
    {
        _BaseColorMap("BaseColorMap", 2D) = "white" {}
		_NormalMap("NormalMap", 2D) = "bump" {}     // Tangent space normal map
		_MaskMap("MaskMap", 2D) = "white" {}
		_DecalBlend("_DecalBlend", Range(0.0, 1.0)) = 0.5
    }

    HLSLINCLUDE

    #pragma target 4.5
    #pragma only_renderers d3d11 ps4 xboxone vulkan metal
    //#pragma enable_d3d11_debug_symbols

    //-------------------------------------------------------------------------------------
    // Variant
    //-------------------------------------------------------------------------------------
	#pragma shader_feature _COLORMAP
	#pragma shader_feature _NORMALMAP
	#pragma shader_feature _MASKMAP

	#pragma multi_compile_instancing
    //-------------------------------------------------------------------------------------
    // Define
    //-------------------------------------------------------------------------------------
	#define UNITY_MATERIAL_DECAL

    //-------------------------------------------------------------------------------------
    // Include
    //-------------------------------------------------------------------------------------

    #include "CoreRP/ShaderLibrary/Common.hlsl"
    #include "CoreRP/ShaderLibrary/Wind.hlsl"
    #include "../../ShaderPass/FragInputs.hlsl"
    #include "../../ShaderPass/ShaderPass.cs.hlsl"


    //-------------------------------------------------------------------------------------
    // variable declaration
    //-------------------------------------------------------------------------------------

    #include "DecalProperties.hlsl"

    // All our shaders use same name for entry point
    #pragma vertex Vert
    #pragma fragment Frag

    ENDHLSL

    SubShader
    {
        Tags{ "RenderPipeline" = "HDRenderPipeline"}

        Pass
        {
            Name "DBuffer"  // Name is not used
            Tags { "LightMode" = "DBuffer" } // This will be only for opaque object based on the RenderQueue index

			// back faces with zfail, for cases when camera is inside the decal volume
            Cull Front
			ZWrite Off
			ZTest Greater
			// using alpha compositing https://developer.nvidia.com/gpugems/GPUGems3/gpugems3_ch23.html
			Blend SrcAlpha OneMinusSrcAlpha, Zero OneMinusSrcAlpha

			HLSLPROGRAM

			#define SHADERPASS SHADERPASS_DBUFFER
			#include "../../ShaderVariables.hlsl"
			#include "Decal.hlsl"
			#include "ShaderPass/DecalSharePass.hlsl"
			#include "DecalData.hlsl"
			#include "../../ShaderPass/ShaderPassDBuffer.hlsl"

            ENDHLSL
        }
	}
    CustomEditor "Experimental.Rendering.HDPipeline.DecalUI"
}