File indexing completed on 2024-04-21 03:45:09

 /*
     SPDX-FileCopyrightText: 2010 Henry de Valence <hdevalence@gmail.com>
 
     SPDX-License-Identifier: GPL-2.0-or-later
 */
 
 #pragma once
 
 #include <QObject>
 #include <QHash>
 
 #include <config-kstars.h>
 
 class QGLWidget;
 class QImage;
 
 /**
  * @brief a singleton class to manage texture loading/retrieval
  */
 class TextureManager : public QObject
 {
     Q_OBJECT
   public:
     /** @short Create the instance of TextureManager */
     static TextureManager *Create();
     /** @short Release the instance of TextureManager */
     static void Release();
 
     /**
      * Return texture image. If image is not found in cache tries to
      * load it from disk if that fails too returns reference to empty image.
      */
     static const QImage &getImage(const QString &name);
 
     /**
      * Clear the cache and discover the directories to load textures from.
      */
     static void discoverTextureDirs();
 #ifdef HAVE_OPENGL
     /**
      *  Bind OpenGL texture. Acts similarly to getImage but does
      *  nothing if image is not found in the end
      */
     static void bindTexture(const QString &name, QGLWidget *cxt);
 
     /** Bind OpenGL texture using QImage as source */
     static void bindFromImage(const QImage &image, QGLWidget *cxt);
 #endif
 
   private:
     /** Shorthand for iterator to hashtable */
     typedef QHash<QString, QImage>::const_iterator CacheIter;
 
     /** Private constructor */
     explicit TextureManager(QObject *parent = nullptr);
     /** Try find image in the cache and then to load it from disk if it's not found */
     static CacheIter findTexture(const QString &name);
 
     // Pointer to singleton instance
     static TextureManager *m_p;
     // List of named textures
     QHash<QString, QImage> m_textures;
 
     // List of texture directories
     std::vector<QString> m_texture_directories;
 
     // Prohibit copying
     TextureManager(const TextureManager &);
     TextureManager &operator=(const TextureManager &);
 };