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

public class BitmapFontScaling : MonoBehaviour
{
    [SerializeField]
    int textSize;
    float bitmapFontOriginScale;
    Text targetText;

    public void OnValidate()
    {
        if (targetText == null)
            targetText = GetComponent<Text>();

        if (targetText == null || targetText.font == null || targetText.font.dynamic == true)
        {
            Debug.LogWarning("Bitmap font is not found.");
            return;
        }

        GetFontSize();
        UpdateScale();
    }

    void GetFontSize()
    {
        textSize = targetText.fontSize;

        bitmapFontOriginScale = targetText.font.lineHeight;
    }

    void UpdateScale()
    {
        float scale;

        if (textSize <= 0 || bitmapFontOriginScale <= 0)
            scale = 1f;
        else
            scale = (float)textSize / bitmapFontOriginScale;

        transform.localScale = new Vector3(scale, scale, scale);
    }
}