Re: Image from byte[]

From:

ram@zedat.fu-berlin.de (Stefan Ram)

Newsgroups:

comp.lang.java.programmer

Date:

30 May 2007 14:43:48 GMT

Message-ID:

<image-20070530164138@ram.dialup.fu-berlin.de>

Ivan Danicic <ivie@localhost.localdomain> writes:

Hello, I have a byte[]img (constructed from an actual .bmp image)
and want to use it to make an object of type Image, not to display

  Here is a simple example how to paint into an int array
  and then create a BufferedImage object from it. This image
  then is saved as a jpeg image.

  WARNING: A file ?generated.jpg? will be o v e r w r i t t e n
  by the process.

public class Main
{ public static void main ( final java.lang.String[] args )
  { int width = 800; int height = 600;
    int[] target = new int[ width * height ];
    for( int y = 0; y < height; y++ )
    { for( int x = 0; x < width; x++ )
      { target[ x + y * width ]=( x )% 255 +(( y )% 255 )* 256; }}
    java.awt.image.BufferedImage output =
    new java.awt.image.BufferedImage
    ( width, height, java.awt.image.BufferedImage.TYPE_INT_RGB );
    output.setRGB( 0, 0, width, height, target, 0, width );
    java.io.BufferedOutputStream out = null;
    try { out = new java.io.BufferedOutputStream
      ( new java.io.FileOutputStream( "generated.jpg" )); }
    catch( final java.io.FileNotFoundException fileNotFoundException )
    { throw new java.lang.RuntimeException( fileNotFoundException ); }
    com.sun.image.codec.jpeg.JPEGImageEncoder encoder =
    com.sun.image.codec.jpeg.JPEGCodec.createJPEGEncoder( out );
    com.sun.image.codec.jpeg.JPEGEncodeParam param =
    encoder.getDefaultJPEGEncodeParam( output );
    param.setQuality( 1.0f, false);
    encoder.setJPEGEncodeParam( param );
    try { encoder.encode( output ); out.close(); }
    catch( final java.io.IOException ioException )
    { throw new java.lang.RuntimeException( ioException ); }}}