using System;
using System.Collections;
using System.Collections.Generic;
using Unity.Collections.LowLevel.Unsafe;
using UnityEngine;
using UnityEngine.UI;
using UnityEngine.XR.ARFoundation;
using UnityEngine.XR.ARSubsystems;

public class ThinkRGB : MonoBehaviour
{
    private ARCameraManager _cameraManager;
    private XRCpuImage _lastCpuImage;
    public bool RenderUsingYUVPlanes;
    private Texture2D _cameraTexture;

    // Start is called before the first frame update
    void Awake()
    {
        _cameraManager = FindObjectOfType<ARCameraManager>();
        _cameraManager.frameReceived += OnFrameReceived;
    }

    private void OnFrameReceived(ARCameraFrameEventArgs obj)
    {

        if (!_cameraManager.TryAcquireLatestCpuImage(out _lastCpuImage))
        {
            Debug.Log("Failed to acquire latest cpu image.");
            return;
        }
        UpdateCameraTexture(_lastCpuImage);
    }

    private unsafe void UpdateCameraTexture(XRCpuImage image)
    {
        var format = TextureFormat.RGBA32;

        if (_cameraTexture == null || _cameraTexture.width != image.width || _cameraTexture.height != image.height)
        {
            _cameraTexture = new Texture2D(image.width, image.height, format, false);
        }

        var conversionParams = new XRCpuImage.ConversionParams(image, format);
        var rawTextureData = _cameraTexture.GetRawTextureData<byte>();
        var rawTexturePtr = new IntPtr(rawTextureData.GetUnsafePtr());

      
        try
        {
            image.Convert(conversionParams, new IntPtr(rawTextureData.GetUnsafePtr()), rawTextureData.Length);
        }
        finally
        {
            image.Dispose();
        }
        _cameraTexture.Apply();
        this.GetComponent<RawImage>().texture = _cameraTexture;
    }
    // Update is called once per frame
    void Update()
    {
        
    }
}