// Shader targeted for low end devices. Single Pass Forward Rendering.
Shader "UniQuake/Quake"
{
    Properties
    {
        [MainTexture] _BaseMap("Base Map (RGB) Alpha (A)", 2D) = "white" {}
        [MainColor]   _BaseColor("Base Color", Color) = (1, 1, 1, 1)

        [NoScaleOffset] _LightMap("Lightmap (RGBA)", 2D) = "white" {}

        _Cutoff("Alpha Clipping", Range(0.0, 1.0)) = 0.666

        [HDR] _EmissionColor("Emission Color", Color) = (0,0,0)
        [NoScaleOffset]_EmissionMap("Emission Map", 2D) = "white" {}
        
        [HideInInspector] _ShadeVector("Shade Vector", Vector) = (0, 0, 0)
        [HideInInspector] _LightColor("Light Color", Color) = (1, 1, 1, 1)

        // Blending state
        [HideInInspector] _Surface("__surface", Float) = 0.0
        [HideInInspector] _Blend("__blend", Float) = 0.0
        [HideInInspector] _AlphaClip("__clip", Float) = 0.0
        [HideInInspector] _SrcBlend("__src", Float) = 1.0
        [HideInInspector] _DstBlend("__dst", Float) = 0.0
        [HideInInspector] _ZWrite("__zw", Float) = 1.0
        [HideInInspector] _Cull("__cull", Float) = 2.0
    }

    SubShader
    {
        Tags { "RenderType" = "Opaque" "RenderPipeline" = "UniversalPipeline" "UniversalMaterialType" = "SimpleLit" "IgnoreProjector" = "True" "ShaderModel"="4.5"}
        LOD 300

        Pass
        {
            Name "ForwardLit"
            Tags { "LightMode" = "UniversalForward" }

            // Use same blending / depth states as Standard shader
            Blend[_SrcBlend][_DstBlend]
            ZWrite[_ZWrite]
            Cull[_Cull]

            HLSLPROGRAM
            #pragma exclude_renderers gles gles3 glcore
            #pragma target 4.5

            // -------------------------------------
            // Material Keywords
            #pragma multi_compile_local __ _ALPHATEST_ON
            #pragma multi_compile_local __ _EMISSION
            #pragma multi_compile_local __ _QLIGHTMAP_ON _AFFINE_ON    // Lightmapping and affine texturing are mutually exclusive 

            // -------------------------------------
            // Universal Pipeline keywords
            #pragma multi_compile _ _ADDITIONAL_LIGHTS_VERTEX _ADDITIONAL_LIGHTS
            #pragma multi_compile _ _POINT_SAMPLING

            // -------------------------------------
            // Unity defined keywords
            #pragma multi_compile_fog

            #pragma vertex LitPassVertexSimple
            #pragma fragment LitPassFragmentSimple
            #define BUMP_SCALE_NOT_SUPPORTED 1

            #include "QuakeInput.hlsl"
            #include "QuakeForwardPass.hlsl"
            ENDHLSL
        }

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

            ZWrite On
            ColorMask 0
            Cull[_Cull]

            HLSLPROGRAM
            #pragma exclude_renderers gles gles3 glcore
            #pragma target 4.5

            #pragma vertex DepthOnlyVertex
            #pragma fragment DepthOnlyFragment

            // -------------------------------------
            // Material Keywords
            #pragma multi_compile_local __ _ALPHATEST_ON

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

        // This pass is used when drawing to a _CameraNormalsTexture texture
        Pass
        {
            Name "DepthNormals"
            Tags{"LightMode" = "DepthNormals"}

            ZWrite On
            Cull[_Cull]

            HLSLPROGRAM
            #pragma exclude_renderers gles gles3 glcore
            #pragma target 4.5

            #pragma vertex DepthNormalsVertex
            #pragma fragment DepthNormalsFragment

            // -------------------------------------
            // Material Keywords
            #pragma multi_compile_local __ _ALPHATEST_ON

            #include "QuakeInput.hlsl"
            #include "Packages/com.unity.render-pipelines.universal/Shaders/DepthNormalsPass.hlsl"
            ENDHLSL
        }
    }

    Fallback "Hidden/Universal Render Pipeline/FallbackError"
    //CustomEditor "UnityEditor.Rendering.Universal.ShaderGUI.SimpleLitShader"
}