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

public class ScreenShot : MonoBehaviour {

    public Camera targetCamera;

    void Update()
    {
        //滑鼠右鍵按下，進行三種截圖方式的呼叫
        if (Input.GetMouseButtonDown(0))
        {
            ScreenShot_ScreenCapture
 
();
            StartCoroutine(ScreenShot_ReadPixels());
            targetCamera.gameObject.SetActive(true);
            ScreenShot_ReadPixelsWithCamera(targetCamera);
            targetCamera.gameObject.SetActive(false);
            //重新整理工程目錄，顯示儲存的圖片，這裡可以不要，改為手動即可
            //AssetDatabase.Refresh ();
 

        }
    }
    //Unity自帶的截圖功能
    private void ScreenShot_ScreenCapture()
    {
        //截圖並儲存
        ScreenCapture.CaptureScreenshot(Application.dataPath + "/ScreenShot_ScreenCapture.png");
    }
    //讀取螢幕畫素進行截圖
    private IEnumerator ScreenShot_ReadPixels()
    {
        yield return new
 
 WaitForEndOfFrame();
        //讀取畫素
        Texture2D tex = new Texture2D(Screen.width, Screen.height);
        tex.ReadPixels(new Rect(0, 0, tex.width, tex.height), 0, 0);
        tex.Apply();
        //儲存讀取的結果
        string path = Application.dataPath + "/ScreenShot_ReadPixels.png";
        System.IO.File.WriteAllBytes(path, tex.EncodeToPNG());
    }
    //讀取指定相機渲染的畫素
    private void ScreenShot_ReadPixelsWithCamera(Camera _camera)
    {
        //對指定相機進行 RenderTexture
        RenderTexture renTex = new RenderTexture(Screen.width, Screen.height, 16);
        _camera.targetTexture = renTex;
        _camera.Render();
        RenderTexture.active = renTex;
        //讀取畫素
        Texture2D tex = new Texture2D(Screen.width, Screen.height);
        tex.ReadPixels(new Rect(0, 0, tex.width, tex.height), 0, 0);
        tex.Apply();
        //讀取目標相機畫素結束，渲染恢復原先的方式
        _camera.targetTexture = null;
        RenderTexture.active = null;
        Destroy(renTex);
        //儲存讀取的結果
        string path = Application.dataPath + "/ScreenShot_ReadPixelsWithCamera.png";
        System.IO.File.WriteAllBytes(path, tex.EncodeToPNG());
    }
}