using System;
using System.IO;
using UnityEngine;
using Object = UnityEngine.Object;

public static class AssetExtractor
{
    public static string ExtractTextureAtPath(Texture2D source, string filePath)
    {
        try
        {
            if (!File.Exists(filePath))
            {
                var renderTex = RenderTexture.GetTemporary(source.width, source.height);
                Graphics.Blit(source, renderTex);
                var texture = new Texture2D(renderTex.width, renderTex.height, TextureFormat.RGBA32, false);
                RenderTexture.active = renderTex;
                texture.ReadPixels(new Rect(0, 0, renderTex.width, renderTex.height), 0, 0);
                RenderTexture.active = null;
                RenderTexture.ReleaseTemporary(renderTex);
                File.WriteAllBytes(filePath, texture.EncodeToPNG());
                Object.DestroyImmediate(texture);
            }
        }
        catch (Exception e)
        {
            Debug.LogError(e.ToString());
            filePath = string.Empty;
        }

        return filePath;
    }
}