qadevOOo/runner/convwatch/ImageHelper.java

   1 /*************************************************************************
   2  *
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * Copyright 2008 by Sun Microsystems, Inc.
   6  *
   7  * OpenOffice.org - a multi-platform office productivity suite
   8  *
   9  * $RCSfile: ImageHelper.java,v $
  10  * $Revision: 1.5 $
  11  *
  12  * This file is part of OpenOffice.org.
  13  *
  14  * OpenOffice.org is free software: you can redistribute it and/or modify
  15  * it under the terms of the GNU Lesser General Public License version 3
  16  * only, as published by the Free Software Foundation.
  17  *
  18  * OpenOffice.org is distributed in the hope that it will be useful,
  19  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  20  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  21  * GNU Lesser General Public License version 3 for more details
  22  * (a copy is included in the LICENSE file that accompanied this code).
  23  *
  24  * You should have received a copy of the GNU Lesser General Public License
  25  * version 3 along with OpenOffice.org.  If not, see
  26  * <http://www.openoffice.org/license.html>
  27  * for a copy of the LGPLv3 License.
  28  *
  29  ************************************************************************/
  30
  31 package convwatch;
  32
  33 import java.awt.Image;
  34 import java.awt.image.PixelGrabber;
  35 import java.awt.image.ImageObserver;
  36 import java.io.File;
  37 //import javax.imageio.ImageIO;
  38 import java.lang.reflect.Method;
  39
  40 class ImageHelper
  41 {
  42     Image m_aImage;
  43     int[] m_aPixels;
  44     int m_w = 0;
  45     int m_h = 0;
  46     boolean m_bGrabbed = false;
  47
  48     public ImageHelper(Image _aImage)
  49     {
  50          m_aImage = _aImage;
  51
  52          // grab all (consume much memory)
  53          m_w = getWidth();
  54          m_h = getHeight();
  55          int x = 0;
  56          int y = 0;
  57          m_aPixels = new int[m_w * m_h];
  58          PixelGrabber pg = new PixelGrabber(m_aImage, x, y, m_w, m_h, m_aPixels, 0, m_w);
  59          try {
  60              pg.grabPixels();
  61          } catch (InterruptedException e) {
  62              System.err.println("interrupted waiting for pixels!");
  63              return;
  64          }
  65          if ((pg.getStatus() & ImageObserver.ABORT) != 0) {
  66              System.err.println("image fetch aborted or errored");
  67              return;
  68          }
  69          m_bGrabbed = true;
  70     }
  71     public int getWidth() {return m_aImage.getWidth(null);}
  72     public int getHeight() {return m_aImage.getHeight(null);}
  73     // direct access to a pixel
  74     public int getPixel(int x, int y)
  75         {
  76             return m_aPixels[y * m_w + x];
  77         }
  78
  79     // Write down the current image to a file.
  80     // public void storeImage(String _sFilename)
  81     //    {
  82     //    }
  83
  84     public static ImageHelper createImageHelper(String _sFilename)
  85         throws java.io.IOException
  86         {
  87             Image aImage = null;
  88             File aFile = new File(_sFilename);
  89             Exception ex = null;
  90             try {
  91                 Class imageIOClass = Class.forName("javax.imageio.ImageIO");
  92                 Method readMethod = imageIOClass.getDeclaredMethod("read", new Class[]{java.io.File.class});
  93                 Object retValue = readMethod.invoke(imageIOClass, new Object[]{aFile});
  94                 aImage = (Image)retValue;
  95             }
  96             catch(java.lang.ClassNotFoundException e) {
  97                 ex = e;
  98             }
  99             catch(java.lang.NoSuchMethodException e) {
 100                 ex = e;
 101             }
 102             catch(java.lang.IllegalAccessException e) {
 103                 ex = e;
 104             }
 105             catch(java.lang.reflect.InvocationTargetException e) {
 106                 ex = e;
 107             }
 108
 109             if (ex != null) {
 110                 // get Java version:
 111                 String javaVersion = System.getProperty("java.version");
 112                 throw new java.io.IOException(
 113                     "Cannot construct object with current Java version " +
 114                     javaVersion + ": " + ex.getMessage());
 115             }
 116 //            aImage = ImageIO.read(aFile);
 117             return new ImageHelper(aImage);
 118         }
 119 }