Shader "LightweightPipeline/PBR/Packed Dialectric"
{
    Properties
    {
        _MainTex("Albedo", 2D) = "white" {} // RGB albedo, A roughness

        _BumpMap("Normal Map", 2D) = "bump" {} // RGB normal, A AO
    }

    SubShader
    {
        // Lightweight Pipeline tag is required. If Lightweight pipeline is not set in the graphics settings
        // this Subshader will fail. One can add a subshader below or fallback to Standard built-in to make this
        // material work with both Lightweight Pipeline and Builtin Unity Pipeline
        Tags{"RenderType" = "Opaque" "RenderPipeline" = "LightweightPipeline" "IgnoreProjector" = "True"}
        LOD 300

        // ------------------------------------------------------------------
        //  Forward pass. Shades all light in a single pass. GI + emission + Fog
        Pass
        {
            // Lightmode matches the ShaderPassName set in LightweightPipeline.cs. SRPDefaultUnlit and passes with
            // no LightMode tag are also rendered by Lightweight Pipeline
            Name "StandardLit"
            Tags{"LightMode" = "LightweightForward"}

            //Blend[_SrcBlend][_DstBlend]
            //ZWrite[_ZWrite]
            //Cull[_Cull]

            HLSLPROGRAM
            // Required to compile gles 2.0 with standard SRP library
            // All shaders must be compiled with HLSLcc and currently only gles is not using HLSLcc by default
            #pragma prefer_hlslcc gles
            #pragma exclude_renderers d3d11_9x
            #pragma target 2.0

            // -------------------------------------
            // Material Keywords
            #pragma shader_feature _NORMALMAP
            #pragma shader_feature _OCCLUSIONMAP

            // -------------------------------------
            // Lightweight Pipeline keywords
            #pragma multi_compile _ _MAIN_LIGHT_SHADOWS
            #pragma multi_compile _ _MAIN_LIGHT_SHADOWS_CASCADE
            #pragma multi_compile _ _ADDITIONAL_LIGHTS_VERTEX _ADDITIONAL_LIGHTS
            #pragma multi_compile _ _ADDITIONAL_LIGHT_SHADOWS
            #pragma multi_compile _ _SHADOWS_SOFT
            #pragma multi_compile _ _MIXED_LIGHTING_SUBTRACTIVE

            // -------------------------------------
            // Unity defined keywords
            #pragma multi_compile _ DIRLIGHTMAP_COMBINED
            #pragma multi_compile _ LIGHTMAP_ON
            #pragma multi_compile_fog

            //--------------------------------------
            // GPU Instancing
            #pragma multi_compile_instancing

            #pragma vertex LitPassVertex
            #pragma fragment LitPassFragment

            #include "InputSurfacePackedDialectric.hlsl"
            #include "Packages/com.unity.render-pipelines.lightweight/Shaders/LitForwardPass.hlsl"
            ENDHLSL
        }

        Pass
        {
            Name "ShadowCaster"
            Tags{"LightMode" = "ShadowCaster"}

            ZWrite On
            Cull Off

            HLSLPROGRAM
            // Required to compile gles 2.0 with standard srp library
            #pragma prefer_hlslcc gles
            #pragma exclude_renderers d3d11_9x
            #pragma target 2.0

            //--------------------------------------
            // GPU Instancing
            #pragma multi_compile_instancing

            #pragma vertex ShadowPassVertex
            #pragma fragment ShadowPassFragment

            #include "InputSurfacePackedDialectric.hlsl"
            #include "Packages/com.unity.render-pipelines.lightweight/Shaders/ShadowCasterPass.hlsl"
            ENDHLSL
        }

        Pass
        {
            Name "DepthOnly"
            Tags{"LightMode" = "DepthOnly"}

            ZWrite On
            ColorMask 0
            Cull[_Cull]

            HLSLPROGRAM
            // Required to compile gles 2.0 with standard srp library
            #pragma prefer_hlslcc gles
            #pragma exclude_renderers d3d11_9x
            #pragma target 2.0

            #pragma vertex DepthOnlyVertex
            #pragma fragment DepthOnlyFragment

            //--------------------------------------
            // GPU Instancing
            #pragma multi_compile_instancing

            #include "InputSurfacePackedDialectric.hlsl"
            #include "Packages/com.unity.render-pipelines.lightweight/Shaders/DepthOnlyPass.hlsl"
            ENDHLSL
        }

        // This pass it not used during regular rendering, only for lightmap baking.
        Pass
        {
            Name "Meta"
            Tags{"LightMode" = "Meta"}

            Cull Off

            HLSLPROGRAM
            // Required to compile gles 2.0 with standard srp library
            #pragma prefer_hlslcc gles
            #pragma exclude_renderers d3d11_9x

            #pragma vertex LightweightVertexMeta
            #pragma fragment LightweightFragmentMeta

            #pragma shader_feature _METALLICSPECGLOSSMAP
            #pragma shader_feature EDITOR_VISUALIZATION

            #include "InputSurfacePackedDialectric.hlsl"
            #include "Packages/com.unity.render-pipelines.lightweight/Shaders/LitMetaPass.hlsl"

            ENDHLSL
        }

    }
    FallBack "Hidden/InternalErrorShader"
}