gov/nasa/worldwind/cache/BasicTextureCache.java

   1 /*
   2 Copyright (C) 2001, 2006 United States Government
   3 as represented by the Administrator of the
   4 National Aeronautics and Space Administration.
   5 All Rights Reserved.
   6 */
   7 package gov.nasa.worldwind.cache;
   8
   9 import com.sun.opengl.util.texture.Texture;
  10
  11 /**
  12  * @author tag
  13  * @version $Id: BasicTextureCache.java 2450 2007-07-27 17:50:43Z tgaskins $
  14  */
  15 public class BasicTextureCache implements TextureCache
  16 {
  17     public static class TextureEntry implements Cacheable
  18     {
  19         private final Texture texture;
  20
  21         public TextureEntry(Texture texture)
  22         {
  23             this.texture = texture;
  24         }
  25
  26         public Texture getTexture()
  27         {
  28             return texture;
  29         }
  30
  31         public long getSizeInBytes()
  32         {
  33             long size = this.texture.getEstimatedMemorySize();
  34
  35             // JOGL returns a zero estimated memory size for some textures, so calculate a size ourselves.
  36             if (size < 1)
  37                 size = this.texture.getHeight() * this.texture.getWidth() * 4;
  38
  39             return size;
  40         }
  41     }
  42
  43     private final BasicMemoryCache textures;
  44
  45     public BasicTextureCache(long loWater, long hiWater)
  46     {
  47         this.textures = new BasicMemoryCache(loWater, hiWater);
  48         this.textures.setName("Texture Cache");
  49         this.textures.addCacheListener(new MemoryCache.CacheListener()
  50         {
  51             public void entryRemoved(Object key, Object clientObject)
  52             {
  53                 // Unbind a tile's texture when the tile leaves the cache.
  54                 if (clientObject != null) // shouldn't be null, but check anyway
  55                 {
  56                     ((TextureEntry) clientObject).texture.dispose();
  57                 }
  58             }
  59         });
  60     }
  61
  62     public void put(Object key, Texture texture)
  63     {
  64         TextureEntry te = new TextureEntry(texture);
  65         this.textures.add(key, te);
  66     }
  67
  68     public Texture get(Object key)
  69     {
  70         TextureEntry entry = (TextureEntry) this.textures.getObject(key);
  71         return entry != null ? entry.texture : null;
  72     }
  73
  74     public void remove(Object key)
  75     {
  76         textures.remove(key);
  77     }
  78
  79     public int getNumObjects()
  80     {
  81         return textures.getNumObjects();
  82     }
  83
  84     public long getCapacity()
  85     {
  86         return textures.getCapacity();
  87     }
  88
  89     public long getUsedCapacity()
  90     {
  91         return textures.getUsedCapacity();
  92     }
  93
  94     public long getFreeCapacity()
  95     {
  96         return textures.getFreeCapacity();
  97     }
  98
  99     public boolean contains(Object key)
 100     {
 101         return textures.contains(key);
 102     }
 103
 104     public void clear()
 105     {
 106         textures.clear();
 107     }
 108 }