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

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1 769 jeremybenn
/* JPEGScan.java --
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   Copyright (C)  2005  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.jpeg;
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import java.util.ArrayList;
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public class JPEGScan
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{
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  private int maxHeight = 0, maxWidth = 0, maxV = 0, maxH = 0;
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  private int numOfComponents = 0, numOfComponentBlocks = 0;
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  private ArrayList components = new ArrayList();
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  public JPEGScan()
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  {
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    // Nothing to do here.
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  }
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  public JPEGScan(int h, int w)
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  {
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    maxHeight=h;
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    maxWidth=w;
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  }
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  private void recalculateDimensions()
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  {
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    JPEGComponent comp;
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    // Compute the maximum H, maximum V factors defined in Annex A of the ISO
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    // DIS 10918-1.
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    for(int i=0; i < components.size() ; i++)
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      {
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        comp = (JPEGComponent)components.get(i);
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        if(comp.factorH > maxH)
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          maxH=comp.factorH;
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        if(comp.factorV > maxV)
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          maxV=comp.factorV;
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      }
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    for(int i=0; i < components.size() ; i++)
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      {
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        comp = (JPEGComponent)components.get(i);
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        comp.maxH = maxH;
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        comp.maxV = maxV;
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      }
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  }
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  public void addComponent(byte id, byte factorHorizontal, byte factorVertical,
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                           byte quantizationID)
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  {
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    JPEGComponent component = new JPEGComponent(id, factorHorizontal, factorVertical, quantizationID);
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    components.add((Object)component);
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    recalculateDimensions();
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    numOfComponents++;
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    numOfComponentBlocks += factorHorizontal*factorVertical;
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  }
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  public JPEGComponent getComponentByID(byte id)
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  {
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    JPEGComponent comp = (JPEGComponent)components.get(0);
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    for(int i=0; i < components.size() ; i++)
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      {
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        comp=(JPEGComponent)components.get(i);
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        if(comp.component_id==id)
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          break;
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      }
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    return(comp);
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  }
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  public JPEGComponent get(int id)
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  {
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    return((JPEGComponent)components.get(id));
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  }
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  public int getX(byte id)
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  {
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    JPEGComponent comp = getComponentByID(id);
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    return(comp.width);
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  }
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  public int getY(byte id)
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  {
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    JPEGComponent comp = getComponentByID(id);
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    return(comp.height);
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  }
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  public int getMaxV()
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  {
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    return(maxV);
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  }
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  public int getMaxH()
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  {
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    return(maxH);
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  }
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  public void setWidth(int w)
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  {
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    maxWidth=w;
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  }
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  public void setHeight(int h)
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  {
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    maxHeight=h;
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  }
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  public int size()
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  {
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    return(numOfComponents);
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  }
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  public int sizeComponentBlocks()
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  {
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    return(numOfComponentBlocks);
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  }
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}

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