CanvasExt.cs

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using UnityEngine;
using UnityEngine.UI;
 
public static class CanvasExt
{
    public static Vector3 CorrectLossyScale(this Canvas canvas)
    {
        if (!Application.isPlaying)
        {
            return Vector3.one;
        }
        if (canvas.renderMode == RenderMode.ScreenSpaceCamera)
        {
            CanvasScaler component = canvas.GetComponent<CanvasScaler>();
            if ((bool)component && component.enabled)
            {
                component.enabled = false;
                Vector3 lossyScale = canvas.GetComponent<RectTransform>().lossyScale;
                component.enabled = true;
                Vector3 lossyScale2 = canvas.GetComponent<RectTransform>().lossyScale;
                return new Vector3(lossyScale2.x / lossyScale.x, lossyScale2.y / lossyScale.y, lossyScale2.z / lossyScale.z);
            }
            return Vector3.one;
        }
        return canvas.GetComponent<RectTransform>().lossyScale;
    }
}