HiResScreenShots.cs

using UnityEngine;
using System.Collections;
using System.IO;

public class HiResScreenShots : MonoBehaviour
{

    public int resWidth = 1920; public int resHeight = 1080;

    [Range(1, 6)]
    public int enlarge = 1;

    public bool transparent = false;

    public KeyCode screenshotKey = KeyCode.F8;
    private bool takeHiResShot = false;
    private TextureFormat transp = TextureFormat.ARGB32;
    private TextureFormat nonTransp = TextureFormat.RGB24;


    public static string ScreenShotName(int width, int height)
    {
        return string.Format("{0}/../screenshots/screen_{1}x{2}_{3}.png",
                             Application.dataPath,
                             width, height,
                             System.DateTime.Now.ToString("yyyy-MM-dd_HH-mm-ss"));
    }

    public void TakeHiResShot()
    {
        takeHiResShot = true;
    }


    void LateUpdate()
    {
        takeHiResShot |= Input.GetKeyDown(KeyCode.F8);
        if (takeHiResShot)
        {
            #if !UNITY_4_3
            #if !UNITY_WEBPLAYER
                TextureFormat textForm = nonTransp;
                if (transparent)
                    textForm = transp;
                RenderTexture rt = new RenderTexture(resWidth * enlarge, resHeight * enlarge, 24);
                Camera.main.targetTexture = rt;
                Texture2D screenShot = new Texture2D(resWidth * enlarge, resHeight * enlarge, textForm, false);
                Camera.main.Render();
                RenderTexture.active = rt;
                screenShot.ReadPixels(new Rect(0, 0, resWidth * enlarge, resHeight * enlarge), 0, 0);
                Camera.main.targetTexture = null;
                RenderTexture.active = null; // JC: added to avoid errors
                Destroy(rt);
                byte[] bytes = screenShot.EncodeToPNG();
                string filename = ScreenShotName(resWidth * enlarge, resHeight * enlarge);
                if (Directory.Exists(Application.dataPath + "/../screenshots/") == false)
                {
                    Directory.CreateDirectory(Application.dataPath + "/../screenshots/");
                }
                System.IO.File.WriteAllBytes(filename, bytes);
                Debug.Log(string.Format("Took screenshot to: {0}", filename));
            #endif
            #endif

            takeHiResShot = false;
        }
    }
}