source/mir/misc/WebdbImage.java

   1 package mir.misc;
   2
   3 /**
   4  * Title:
   5  * Description:
   6  * Copyright:    Copyright (c) 2001
   7  * Company:      Indymedia
   8  * @author
   9  * @version 1.0
  10  */
  11
  12 import java.io.*;
  13 import java.util.Vector;
  14 import javax.media.jai.*;
  15 import com.sun.media.jai.codec.*;
  16 import java.awt.image.renderable.ParameterBlock;
  17
  18 public class WebdbImage
  19 {
  20
  21         // default values for scaling
  22         private int               maxIconSize=120;
  23         private int               maxImageSize=640;
  24
  25         private byte[]            iconData;
  26         private byte[]            imageData;
  27         private int               iconWidth;
  28         private int               iconHeight;
  29
  30         // internal representation of the image
  31         private PlanarImage       planarImage;
  32
  33   // type of the image
  34   private String _type;
  35
  36
  37         // constructor
  38         public WebdbImage(byte[] image, String type)
  39                 throws IOException
  40         {
  41                 planarImage = JAI.create("stream",new ByteArraySeekableStream(image));
  42     _type = type;
  43                 scaleImage();
  44         }
  45
  46         public WebdbImage(byte[] image, String type, int iconMax)
  47                 throws IOException
  48         {
  49                 maxIconSize=iconMax;
  50                 planarImage = JAI.create("stream",new ByteArraySeekableStream(image));
  51     _type = type;
  52                 scaleImage();
  53         }
  54
  55         public WebdbImage(byte[] image, String type, int iconMax, int imageMax)
  56                 throws IOException
  57         {
  58                 maxIconSize=iconMax;
  59                 maxImageSize=imageMax;
  60                 planarImage = JAI.create("stream",new ByteArraySeekableStream(image));
  61     _type = type;
  62                 scaleImage();
  63         }
  64
  65         // acc3ssor-methods
  66         public int getIconWidth() throws IOException {
  67                 if (iconData==null) scaleIcon();
  68                 return iconWidth;
  69         }
  70
  71         public int getIconHeight() throws IOException {
  72                 if (iconData==null) scaleIcon();
  73                 return iconHeight;
  74         }
  75
  76         public int getImageWidth() {
  77                 return (int)planarImage.getWidth();
  78         }
  79
  80         public int getImageHeight() {
  81                 return (int)planarImage.getHeight();
  82         }
  83
  84         public byte[] getImage() {
  85                 if (imageData==null) {
  86                         ByteArrayOutputStream outStream = new ByteArrayOutputStream();
  87       JAI.create("encode", planarImage, outStream, _type, null);
  88                         imageData = outStream.toByteArray();
  89                 }
  90                 return imageData;
  91         }
  92
  93         public byte[] getIcon()
  94                 throws IOException
  95         {
  96                 if (iconData == null) scaleIcon();
  97                 return iconData;
  98         }
  99
 100         private void scaleImage()
 101                 throws java.io.IOException
 102         {
 103                 if (maxImageSize>0 && ( getImageHeight()> maxImageSize|| getImageWidth() >maxImageSize))
 104                 {
 105       System.out.println("SCALE_IMAGE");
 106                         float scale;
 107       ParameterBlockJAI params = new ParameterBlockJAI("scale");
 108       params.addSource(planarImage);
 109                         if (getImageHeight() > getImageWidth())
 110         scale = (float)maxImageSize / (float)getImageHeight();
 111       else
 112         scale = (float)maxImageSize / (float)getImageWidth();
 113
 114       params.setParameter("xScale", scale);
 115       params.setParameter("yScale", scale);
 116                         params.setParameter("xTrans",0.0F);
 117                         params.setParameter("yTrans",0.0F);
 118                         params.setParameter("interpolation",new InterpolationBilinear());
 119                         planarImage = JAI.create("scale", params);
 120                 }
 121         }
 122
 123         private void scaleIcon()
 124                 throws java.io.IOException
 125         {
 126     System.out.println("SCALE_ICON");
 127                 if (iconData==null) {
 128                         float scale;
 129       ParameterBlockJAI params = new ParameterBlockJAI("scale");
 130       params.addSource(planarImage);
 131                         if (getImageHeight() > getImageWidth())
 132         scale = (float)maxIconSize / (float)getImageHeight();
 133       else
 134         scale = (float)maxIconSize / (float)getImageWidth();
 135
 136       params.setParameter("xScale", scale);
 137       params.setParameter("yScale", scale);
 138                         params.setParameter("xTrans",0.0F);
 139                         params.setParameter("yTrans",0.0F);
 140                         params.setParameter("interpolation",new InterpolationBilinear());
 141       PlanarImage temp = JAI.create("scale", params);
 142                         ByteArrayOutputStream outStream = new ByteArrayOutputStream();
 143       JAI.create("encode", temp, outStream, _type, null);
 144                         iconData = outStream.toByteArray();
 145                         iconWidth=temp.getWidth();
 146                         iconHeight=temp.getHeight();
 147                 }
 148         }
 149
 150 }