using UnityEngine;
using System.Collections;
using System.Collections.Generic;public class DynamicFontTextureRebuildTracker : MonoBehaviour
{private class FontUpdateNode{private bool m_FontTextureRebuilt = false;private Font m_FontRebuilt = null;public FontUpdateNode(Font font){m_FontRebuilt = font;Validate();}public void Validate(){if (null == m_FontRebuilt){m_FontTextureRebuilt = false;Debug.LogWarning("You need a actual font to validate!");return;}m_FontTextureRebuilt = true;}public void Invalidate(){m_FontTextureRebuilt = false;}public bool NeedUpdate{get { return m_FontTextureRebuilt && (null != m_FontRebuilt); }}public Font font{get { return m_FontRebuilt; }}}private System.Reflection.MethodInfo m_RebuildForFont = null;private List<FontUpdateNode> m_FontUpdateList = new List<FontUpdateNode>();private static DynamicFontTextureRebuildTracker m_Instance = null;void Awake(){if (null != m_Instance){Debug.LogError("There is only one DynamicFontTextureRebuildTracker instance allowed!");Destroy(gameObject);return;}m_Instance = this;}// Use this for initializationvoid Start() {Font.textureRebuilt += OnFontTextureRebuilt;System.Type fontUpdateTrackerType = typeof(UnityEngine.UI.FontUpdateTracker);m_RebuildForFont = fontUpdateTrackerType.GetMethod("RebuildForFont", System.Reflection.BindingFlags.NonPublic | System.Reflection.BindingFlags.Static);Debug.Log("Get RebuildForFont method is: " + m_RebuildForFont);}// Update is called once per framevoid LateUpdate() {if (null == m_RebuildForFont){return;}for (int i = 0; i < m_FontUpdateList.Count; i++){FontUpdateNode node = m_FontUpdateList[i];if (node.NeedUpdate){Font font = node.font;m_RebuildForFont.Invoke(null, new object[] { font });// Log rebuild.Texture fontTexture = font.material.mainTexture;Debug.Log(string.Format("Texture of dynamic font \"{0}\" is enlarged to {1}x{2}.", font.name, fontTexture.width, fontTexture.height));node.Invalidate();}}}void OnDestroy(){Font.textureRebuilt -= OnFontTextureRebuilt;}private void OnFontTextureRebuilt(Font font){bool findThisFont = false;for (int i = 0; i < m_FontUpdateList.Count; i++){FontUpdateNode node = m_FontUpdateList[i];if (node.font == font){node.Validate();findThisFont = true;break;}}if (!findThisFont){m_FontUpdateList.Add(new FontUpdateNode(font));}}//void OnGUI()//{//    if (GUI.Button(new Rect(30.0f, 50.0f, 200.0f, 50.0f), "Force Update Text"))//    {//        for (int i = 0; i < m_FontUpdateList.Count; i++)//        {//            Font font = m_FontUpdateList[i].font;//            m_RebuildForFont.Invoke(null, new object[] { font });//            Debug.Log(string.Format("Force rebuild text for font \"{0}\".", font.name));//        }//        Debug.Log("Force rebuild all text ok!");//    }//}
}