RenderTextureをpngに保存(高速版)

• save render texture as png
• pngとして画像を保存

using System.IO;
using UnityEngine;
using UnityEngine.Assertions;
using UnityEngine.Rendering;
using UnityEngine.UI;

public class RenderTex2PNG : MonoBehaviour
{

    [SerializeField] private RenderTexture _renderTex; 
    private Texture2D _texture;

    void Update(){

        if(Input.GetKeyDown(KeyCode.A)){
            Capture();
        }

    }

    public void Capture(){

        if(_texture==null){
            _texture = new Texture2D(
                _renderTex.width,_renderTex.height,TextureFormat.RGBA32, false
            );
        }
        AsyncGPUReadback.Request(_renderTex, 0, _onRequest);

    }

    private void _onRequest(AsyncGPUReadbackRequest request){
        

        if (request.hasError)
        {
            Debug.LogError("Error.");
        }
        else
        {
            var data = request.GetData<Color32>();
            _texture.LoadRawTextureData(data);
            _texture.Apply();
        }

        var str = System.DateTime.Now.ToString("yyMMddHHmmss");
        File.WriteAllBytes( 
            $"{Application.dataPath}/image"+ str + ".png",
            _texture.EncodeToPNG()
        );

    }



}

参考

kitasenjudesign.hatenablog.com