1 files changed, 151 insertions, 0 deletions
diff --git a/gnu/javax/imageio/jpeg/JPEGScan.java b/gnu/javax/imageio/jpeg/JPEGScan.java
new file mode 100644
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+++ b/gnu/javax/imageio/jpeg/JPEGScan.java
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+/* JPEGScan.java --
+   Copyright (C)  2005  Free Software Foundation, Inc.
+
+This file is part of GNU Classpath.
+
+GNU Classpath is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+GNU Classpath is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Classpath; see the file COPYING.  If not, write to the
+Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301 USA.
+
+Linking this library statically or dynamically with other modules is
+making a combined work based on this library.  Thus, the terms and
+conditions of the GNU General Public License cover the whole
+combination.
+
+As a special exception, the copyright holders of this library give you
+permission to link this library with independent modules to produce an
+executable, regardless of the license terms of these independent
+modules, and to copy and distribute the resulting executable under
+terms of your choice, provided that you also meet, for each linked
+independent module, the terms and conditions of the license of that
+module.  An independent module is a module which is not derived from
+or based on this library.  If you modify this library, you may extend
+this exception to your version of the library, but you are not
+obligated to do so.  If you do not wish to do so, delete this
+exception statement from your version. */
+
+package gnu.javax.imageio.jpeg;
+
+import java.util.ArrayList;
+
+public class JPEGScan
+{
+  private int maxHeight = 0, maxWidth = 0, maxV = 0, maxH = 0;
+  private int numOfComponents = 0, numOfComponentBlocks = 0;
+  private ArrayList components = new ArrayList();
+
+  public JPEGScan()
+  {
+    // Nothing to do here.
+  }
+
+  public JPEGScan(int h, int w)
+  {
+    maxHeight=h;
+    maxWidth=w;
+  }
+
+  private void recalculateDimensions()
+  {
+    JPEGComponent comp;
+
+    // Compute the maximum H, maximum V factors defined in Annex A of the ISO
+    // DIS 10918-1.
+    for(int i=0; i < components.size() ; i++)
+      {
+        comp = (JPEGComponent)components.get(i);
+        if(comp.factorH > maxH)
+          maxH=comp.factorH;
+        if(comp.factorV > maxV)
+          maxV=comp.factorV;
+      }
+
+    for(int i=0; i < components.size() ; i++)
+      {
+        comp = (JPEGComponent)components.get(i);
+        comp.maxH = maxH;
+        comp.maxV = maxV;
+      }
+
+  }
+
+  public void addComponent(byte id, byte factorHorizontal, byte factorVertical,
+                           byte quantizationID)
+  {
+    JPEGComponent component = new JPEGComponent(id, factorHorizontal, factorVertical, quantizationID);
+    components.add((Object)component);
+    recalculateDimensions();
+    numOfComponents++;
+    numOfComponentBlocks += factorHorizontal*factorVertical;
+  }
+
+  public JPEGComponent getComponentByID(byte id)
+  {
+    JPEGComponent comp = (JPEGComponent)components.get(0);
+    for(int i=0; i < components.size() ; i++)
+      {
+        comp=(JPEGComponent)components.get(i);
+        if(comp.component_id==id)
+          break;
+      }
+    return(comp);
+  }
+
+  public JPEGComponent get(int id)
+  {
+    return((JPEGComponent)components.get(id));
+  }
+
+  public int getX(byte id)
+  {
+    JPEGComponent comp = getComponentByID(id);
+    return(comp.width);
+  }
+
+  public int getY(byte id)
+  {
+    JPEGComponent comp = getComponentByID(id);
+    return(comp.height);
+  }
+
+  public int getMaxV()
+  {
+    return(maxV);
+  }
+
+  public int getMaxH()
+  {
+    return(maxH);
+  }
+
+  public void setWidth(int w)
+  {
+    maxWidth=w;
+  }
+
+  public void setHeight(int h)
+  {
+    maxHeight=h;
+  }
+
+  public int size()
+  {
+    return(numOfComponents);
+  }
+
+  public int sizeComponentBlocks()
+  {
+    return(numOfComponentBlocks);
+  }
+}