/**
 * PANDA 3D SOFTWARE
 * Copyright (c) Carnegie Mellon University.  All rights reserved.
 *
 * All use of this software is subject to the terms of the revised BSD
 * license.  You should have received a copy of this license along
 * with this source code in a file named "LICENSE."
 *
 * @file fontPool.h
 * @author drose
 * @date 2003-01-31
 */

#ifndef FONTPOOL_H
#define FONTPOOL_H

#include "pandabase.h"

#include "texture.h"
#include "textFont.h"
#include "filename.h"
#include "lightMutex.h"
#include "pmap.h"

/**
 * This is the preferred interface for loading fonts for the TextNode system.
 * It is similar to ModelPool and TexturePool in that it unifies references to
 * the same filename.
 */
class EXPCL_PANDA_TEXT FontPool {
PUBLISHED:
  // These functions take string parameters instead of Filenames because the
  // parameters may not be entirely an actual filename: they may be a filename
  // followed by a face index.

  INLINE static bool has_font(const std::string &filename);
  INLINE static bool verify_font(const std::string &filename);
  BLOCKING INLINE static TextFont *load_font(const std::string &filename);
  INLINE static void add_font(const std::string &filename, TextFont *font);
  INLINE static void release_font(const std::string &filename);
  INLINE static void release_all_fonts();

  INLINE static int garbage_collect();

  INLINE static void list_contents(std::ostream &out);
  static void write(std::ostream &out);

private:
  INLINE FontPool();

  bool ns_has_font(const std::string &str);
  TextFont *ns_load_font(const std::string &str);
  void ns_add_font(const std::string &str, TextFont *font);
  void ns_release_font(const std::string &str);
  void ns_release_all_fonts();
  int ns_garbage_collect();
  void ns_list_contents(std::ostream &out) const;

  static void lookup_filename(const std::string &str, std::string &index_str,
                              Filename &filename, int &face_index);

  static FontPool *get_ptr();
  static FontPool *_global_ptr;

  LightMutex _lock;
  typedef pmap<std::string,  PT(TextFont) > Fonts;
  Fonts _fonts;
};

#include "fontPool.I"

#endif