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[/] [openrisc/] [trunk/] [gnu-dev/] [or1k-gcc/] [libjava/] [classpath/] [gnu/] [javax/] [imageio/] [bmp/] [EncodeRGB4.java] - Blame information for rev 769

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1 769 jeremybenn
/* EncodeRGB4.java --
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   Copyright (C) 2006 Free Software Foundation, Inc.
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This file is part of GNU Classpath.
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GNU Classpath is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GNU Classpath is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU Classpath; see the file COPYING.  If not, write to the
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Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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02110-1301 USA.
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Linking this library statically or dynamically with other modules is
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making a combined work based on this library.  Thus, the terms and
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conditions of the GNU General Public License cover the whole
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combination.
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As a special exception, the copyright holders of this library give you
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permission to link this library with independent modules to produce an
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executable, regardless of the license terms of these independent
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modules, and to copy and distribute the resulting executable under
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terms of your choice, provided that you also meet, for each linked
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independent module, the terms and conditions of the license of that
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module.  An independent module is a module which is not derived from
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or based on this library.  If you modify this library, you may extend
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this exception to your version of the library, but you are not
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obligated to do so.  If you do not wish to do so, delete this
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exception statement from your version. */
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package gnu.javax.imageio.bmp;
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import java.awt.image.BufferedImage;
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import java.awt.image.PixelGrabber;
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import java.io.IOException;
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import javax.imageio.IIOImage;
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import javax.imageio.ImageWriteParam;
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import javax.imageio.metadata.IIOMetadata;
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import javax.imageio.stream.ImageOutputStream;
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public class EncodeRGB4
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    extends BMPEncoder
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{
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  protected BMPInfoHeader infoHeader;
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  protected BMPFileHeader fileHeader;
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  protected long offset;
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  /**
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   * Constructs an instance of this class.
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   *
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   * @param fh - the file header to use.
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   * @param ih - the info header to use.
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   */
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  public EncodeRGB4(BMPFileHeader fh, BMPInfoHeader ih)
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  {
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    super();
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    fileHeader = fh;
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    infoHeader = ih;
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    offset = BMPFileHeader.SIZE + BMPInfoHeader.SIZE;
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  }
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  /**
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   * The image encoder.
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   *
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   * @param o - the image output stream
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   * @param streamMetadata - metadata associated with this stream, or
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   * null
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   * @param image - an IIOImage containing image data.
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   * @param param - image writing parameters, or null
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   * @exception IOException if a write error occurs
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   */
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  public void encode(ImageOutputStream o, IIOMetadata streamMetadata,
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                     IIOImage image, ImageWriteParam param) throws IOException
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  {
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    int size;
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    int value;
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    int j;
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    int rowCount;
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    int rowIndex;
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    int lastRowIndex;
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    int[] bitmap;
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    byte rgb[] = new byte[1];
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    size = (infoHeader.biWidth * infoHeader.biHeight) - 1;
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    rowCount = 1;
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    rowIndex = size - infoHeader.biWidth;
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    lastRowIndex = rowIndex;
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    try
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      {
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        bitmap = new int[infoHeader.biWidth * infoHeader.biHeight];
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        PixelGrabber pg = new PixelGrabber((BufferedImage) image.getRenderedImage(),
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                                           0, 0, infoHeader.biWidth,
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                                           infoHeader.biHeight, bitmap, 0,
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                                           infoHeader.biWidth);
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        pg.grabPixels();
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        for (j = 0; j < size; j++)
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          {
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            value = bitmap[rowIndex];
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            rgb[0] = (byte) (value & 0xFF);
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            o.write(rgb);
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            if (rowCount == infoHeader.biWidth)
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              {
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                rowCount = 1;
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                rowIndex = lastRowIndex - infoHeader.biWidth;
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                lastRowIndex = rowIndex;
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              }
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            else
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              rowCount++;
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            rowIndex++;
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          }
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      }
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    catch (Exception wb)
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      {
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        wb.printStackTrace();
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      }
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  }
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}

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