using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;

public class OpenCamera : MonoBehaviour
{
    // UI 相关参数

    public RawImage rawImage;

    // 摄像机图片参数

    private WebCamTexture webCamTexture;
    // Start is called before the first frame update
    void Start()
    {
        StartCoroutine("OpenCameraTest");
    }

    IEnumerator OpenCameraTest()
    {
        // 申请相机权限

        yield return Application.RequestUserAuthorization(UserAuthorization.WebCam);

        // 判断是否有相机权限

        if (Application.HasUserAuthorization(UserAuthorization.WebCam))
        {

            // 获取相机设备

            WebCamDevice[] webCamDevices = WebCamTexture.devices;

            // 判断是否有相机设别

            if (webCamDevices != null && webCamDevices.Length > 0)
            {

                // 把 0 号设备（移动端后置摄像头）名称赋值

                string webCamName = webCamDevices[0].name;

                // 设置相机渲染宽高，并运行相机

                webCamTexture = new WebCamTexture(webCamName, Screen.width, Screen.height);
                //  webCamTexture.requestedFPS = 30;
                webCamTexture.Play();

                // 把获取的图像渲染到画布上
                
                rawImage.texture = webCamTexture;

            }

        }

    }
}