bundles/org.simantics.utils.ui/src/org/simantics/utils/ui/gfx/clipboard/streams/RemoveBitmapHeaderOutputStream.java

   1 /*******************************************************************************
   2  * Copyright (c) 2007, 2010 Association for Decentralized Information Management
   3  * in Industry THTH ry.
   4  * All rights reserved. This program and the accompanying materials
   5  * are made available under the terms of the Eclipse Public License v1.0
   6  * which accompanies this distribution, and is available at
   7  * http://www.eclipse.org/legal/epl-v10.html
   8  *
   9  * Contributors:
  10  *     VTT Technical Research Centre of Finland - initial API and implementation
  11  *******************************************************************************/
  12 package org.simantics.utils.ui.gfx.clipboard.streams;
  13
  14 import java.io.IOException;
  15 import java.io.OutputStream;
  16
  17 import org.simantics.utils.ui.gfx.clipboard.headers.BitmapFileHeader;
  18
  19
  20 /**
  21  * Removes WIN32 API BITMAPFILEHEADER from the beginning of stream
  22  *
  23  * @author Marko Luukkainen
  24  *
  25  */
  26 public class RemoveBitmapHeaderOutputStream extends OutputStream{
  27     private OutputStream oStream;
  28     private int byteCount = 0;
  29
  30     public RemoveBitmapHeaderOutputStream(OutputStream oStream) {
  31         this.oStream = oStream;
  32     }
  33
  34     @Override
  35     public void write(byte[] b) throws IOException {
  36         if (byteCount >= BitmapFileHeader.sizeof) {
  37             super.write(b);
  38         } else if (b.length >= BitmapFileHeader.sizeof - byteCount){
  39             byte[] newArray = new byte[b.length - BitmapFileHeader.sizeof + byteCount];
  40             System.arraycopy(b, BitmapFileHeader.sizeof - byteCount, newArray, 0, newArray.length);
  41             byteCount = BitmapFileHeader.sizeof;
  42             super.write(newArray);
  43         } else {
  44             byteCount+= b.length;
  45         }
  46         super.write(b);
  47     }
  48
  49     @Override
  50     public void write(byte[] b, int off, int len) throws IOException {
  51         if (byteCount >= BitmapFileHeader.sizeof)
  52             super.write(b, off, len);
  53         else
  54             throw new IOException("Operation not supported, cannot remove header");
  55     }
  56
  57     @Override
  58     public void write(int b) throws IOException {
  59         if (byteCount >= BitmapFileHeader.sizeof) {
  60             oStream.write(b);
  61         } else {
  62             byteCount++;
  63         }
  64     }
  65 }