UniVRM/Assets/VRMShaders/GLTF/IO/Runtime/TextureImportParam.cs

using System;
using System.Threading.Tasks;
using UnityEngine;

namespace VRMShaders
{
    /// <summary>
    /// get bytes for
    /// 
    /// runtime:
    ///   Texture2D.LoadImage
    /// extact:
    ///   File.WriteAllBytes
    /// </summary>
    /// <returns></returns>
    public delegate Task<byte[]> GetTextureBytesAsync();

    public struct TextureImportParam
    {
        public const string NORMAL_PROP = "_BumpMap";

        public const string METALLIC_GLOSS_PROP = "_MetallicGlossMap";
        public const string OCCLUSION_PROP = "_OcclusionMap";

        public readonly string UnityObjectName;
        public readonly string Ext;
        public readonly string Uri;

        public Vector2 Offset;
        public Vector2 Scale;

        public SamplerParam Sampler;

        public readonly TextureImportTypes TextureType;
        public readonly float MetallicFactor;
        public readonly float RoughnessFactor;

        public readonly GetTextureBytesAsync Index0;
        public readonly GetTextureBytesAsync Index1;
        public readonly GetTextureBytesAsync Index2;
        public readonly GetTextureBytesAsync Index3;
        public readonly GetTextureBytesAsync Index4;
        public readonly GetTextureBytesAsync Index5;

        /// <summary>
        /// この種類は RGB チャンネルの組み換えが必用
        /// </summary>
        public bool ExtractConverted => TextureType == TextureImportTypes.StandardMap;

        public TextureImportParam(string name, string ext, string uri, Vector2 offset, Vector2 scale, SamplerParam sampler, TextureImportTypes textureType, float metallicFactor, float roughnessFactor,
            GetTextureBytesAsync i0,
            GetTextureBytesAsync i1,
            GetTextureBytesAsync i2,
            GetTextureBytesAsync i3,
            GetTextureBytesAsync i4,
            GetTextureBytesAsync i5)
        {
            UnityObjectName = name;
            Ext = ext;
            Uri = uri;
            Offset = offset;
            Scale = scale;
            Sampler = sampler;
            TextureType = textureType;
            MetallicFactor = metallicFactor;
            RoughnessFactor = roughnessFactor;
            Index0 = i0;
            Index1 = i1;
            Index2 = i2;
            Index3 = i3;
            Index4 = i4;
            Index5 = i5;
        }
    }
}