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Class com.visualtek.png.PNGDecoder 

java.lang.Object
   |
   +----com.visualtek.png.PNGDecoder
public class PNGDecoder
extends Object
implements ImageObserver
PNG decoder.

Variable Index

o IMAGE_ERROR
o IMAGE_IS_NOT_READY
o IMAGE_OK

Constructor Index

o PNGDecoder(InputStream)
Constructs PNG encoder
o PNGDecoder(String)
Constructs PNG decoder
o PNGDecoder(URL)
Constructs PNG encoder

Method Index

o decode()
Reads and decodes PNG image
o imageUpdate(Image, int, int, int, int, int)
Is called when previously requested information about an image becomes available.
o status()
Returns status of the image.

Variables

o IMAGE_IS_NOT_READY 
 public static final int IMAGE_IS_NOT_READY
o IMAGE_OK 
 public static final int IMAGE_OK
o IMAGE_ERROR 
 public static final int IMAGE_ERROR

Constructors

o PNGDecoder 
 public PNGDecoder(String filename) throws IOException, FileNotFoundException
Constructs PNG decoder

Parameters:
String - filename - name of file with PNG image
o PNGDecoder 
 public PNGDecoder(URL url) throws IOException
Constructs PNG encoder

Parameters:
URL - url - URL with PNG image
o PNGDecoder 
 public PNGDecoder(InputStream in) throws IOException
Constructs PNG encoder

Parameters:
InputStream - in - input stream with PNG image

Methods

o decode 
 public Image decode() throws PNGException, IOException
Reads and decodes PNG image

Returns:
Image - created image
o imageUpdate 
 public boolean imageUpdate(Image img,
                            int infoflags,
                            int x,
                            int y,
                            int width,
                            int height)
Is called when previously requested information about an image becomes available.

See Also:
ImageObserver
o status 
 public int status()
Returns status of the image. 

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