/**
* Copyright(c) Live2D Inc. All rights reserved.
*
* Use of this source code is governed by the Live2D Open Software license
* that can be found at https://www.live2d.com/eula/live2d-open-software-license-agreement_en.html.
*/


Shader "Live2D Cubism/Unlit"
{
    Properties
    {
        // Texture and model opacity settings.
        [PerRendererData] _MainTex("Main Texture", 2D) = "white" {}
        [PerRendererData] cubism_ModelOpacity("Model Opacity", Float) = 1


        // Blend settings.
        _SrcColor("Source Color", Int) = 0
        _DstColor("Destination Color", Int) = 0
        _SrcAlpha("Source Alpha", Int) = 0
        _DstAlpha("Destination Alpha", Int) = 0


        // Culling setting.
        _Cull("Culling", Int) = 0


        // Mask settings.
        [Toggle(CUBISM_MASK_ON)] cubism_MaskOn("Mask?", Int) = 0
        [Toggle(CUBISM_INVERT_ON)] cubism_InvertOn("Inverted?", Int) = 0
        [PerRendererData] cubism_MaskTexture("cubism_Internal", 2D) = "white" {}
        [PerRendererData] cubism_MaskTile("cubism_Internal", Vector) = (0, 0, 0, 0)
        [PerRendererData] cubism_MaskTransform("cubism_Internal", Vector) = (0, 0, 0, 0)

        //对FairyGUI自定义遮罩生效
        _StencilComp("Stencil Comparison", Float) = 8
        _Stencil("Stencil ID", Float) = 0
        _StencilOp("Stencil Operation", Float) = 0
        _StencilWriteMask("Stencil Write Mask", Float) = 255
        _StencilReadMask("Stencil Read Mask", Float) = 255
    }
    SubShader
    {
        Tags
        {
            "Queue" = "Transparent"
            "IgnoreProjector" = "True"
            "RenderType" = "Transparent"
            "PreviewType" = "Plane"
            "CanUseSpriteAtlas" = "True"
        }

        //对FairyGUI自定义遮罩生效
        Stencil
        {
            Ref[_Stencil]
            Comp[_StencilComp]
            Pass[_StencilOp]
            ReadMask[_StencilReadMask]
            WriteMask[_StencilWriteMask]
        }

        Cull     [_Cull]
        Lighting Off
        ZWrite   Off
        Blend    [_SrcColor][_DstColor], [_SrcAlpha][_DstAlpha]

        Pass
        {
            CGPROGRAM
            #pragma vertex vert
            #pragma fragment frag
            #pragma multi_compile CUBISM_MASK_ON CUBISM_MASK_OFF CUBISM_INVERT_ON


            #include "UnityCG.cginc"
            #include "CubismCG.cginc"


            struct appdata
            {
                float4 vertex   : POSITION;
                float4 color    : COLOR;
                float2 texcoord : TEXCOORD0;
                UNITY_VERTEX_INPUT_INSTANCE_ID
            };


            struct v2f
            {
                float4 vertex   : SV_POSITION;
                fixed4 color    : COLOR;
                float2 texcoord : TEXCOORD0;
                UNITY_VERTEX_OUTPUT_STEREO

                // Add Cubism specific vertex output data.
                CUBISM_VERTEX_OUTPUT
            };


            sampler2D _MainTex;


            // Include Cubism specific shader variables.
            CUBISM_SHADER_VARIABLES


            v2f vert (appdata IN)
            {
                v2f OUT;


                UNITY_SETUP_INSTANCE_ID(IN);
                UNITY_INITIALIZE_VERTEX_OUTPUT_STEREO(OUT);


                OUT.vertex = UnityObjectToClipPos(IN.vertex);
                OUT.texcoord = IN.texcoord;
                OUT.color = IN.color;


                // Initialize Cubism specific vertex output data.
                CUBISM_INITIALIZE_VERTEX_OUTPUT(IN, OUT);


                return OUT;
            }


            fixed4 frag (v2f IN) : SV_Target
            {
                fixed4 OUT = tex2D(_MainTex, IN.texcoord) * IN.color;


                // Apply Cubism alpha to color.
                CUBISM_APPLY_ALPHA(IN, OUT);


                return OUT;
            }
            ENDCG
        }
    }
}