using UnityEngine;

[RequireComponent(typeof(Camera))]
public class CaptchaRenderTexture : MonoBehaviour {

	private Camera cam;

	void Awake(){
		cam = GetComponent<Camera>();
	}

	public Texture2D CaptchaToTexture2D(int width, int height, int depth, bool linear = false, bool mipmap = false, TextureFormat format = TextureFormat.ARGB32){
		RenderTexture renderTexture = new RenderTexture(width, height, depth);
		renderTexture.Create();
		cam.targetTexture = renderTexture;
		cam.Render();

		Texture2D texture = new Texture2D(renderTexture.width, renderTexture.height, format, mipmap, linear);
		RenderTexture.active = renderTexture;
		texture.ReadPixels(new Rect(0, 0, renderTexture.width, renderTexture.height), 0, 0, mipmap);
		texture.Apply();
		cam.targetTexture = null;
		RenderTexture.active = null;

		return texture;
	}
}