put.java

用Java开发的、实现类似Visio功能的应用程序源码

/**
 *    $Id: Put.java $
 *
 *    Copyright 2004 ~ 2005 JingFei International Cooperation LTD. All rights reserved.
 *
 */
package com.jfimagine.utils.image;

import java.io.OutputStream;
import java.io.IOException;

//==============================================================================
/** 
 * This GIFEncoder class is adapted from Gif89Encoder, http://jmge.net/  
 * 
 *  Just a couple of trivial output routines used by other classes in the
 *  package.  Normally this kind of stuff would be in a separate IO package, but
 *  I wanted the present package to be self-contained for ease of distribution
 *  and use by others.
 */
final class Put {

  //----------------------------------------------------------------------------
  /** Write just the low bytes of a String.  (This sucks, but the concept of an
   *  encoding seems inapplicable to a binary file ID string.  I would think
   *  flexibility is just what we don't want - but then again, maybe I'm slow.)
   */  
  static void ascii(String s, OutputStream os) throws IOException
  {
    byte[] bytes = new byte[s.length()];
    for (int i = 0; i < bytes.length; ++i)
      bytes[i] = (byte) s.charAt(i);  // discard the high byte     
    os.write(bytes); 
  }

  //----------------------------------------------------------------------------
  /** Write a 16-bit integer in little endian byte order.
   */   
  static void leShort(int i16, OutputStream os) throws IOException
  {
    os.write(i16 & 0xff);
    os.write(i16 >> 8 & 0xff);
  } 
}