1 files changed, 104 insertions, 0 deletions
diff --git a/libjava/classpath/gnu/javax/imageio/png/PNGData.java b/libjava/classpath/gnu/javax/imageio/png/PNGData.java
new file mode 100644
index 000000000..08d765f66
--- /dev/null
+++ b/libjava/classpath/gnu/javax/imageio/png/PNGData.java
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+/* PNGData.java -- PNG IDAT chunk.
+   Copyright (C) 2006 Free Software Foundation
+
+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.png;
+
+import java.util.zip.Inflater;
+import java.util.zip.Deflater;
+
+/**
+ * A PNG IDAT (data) chunk.
+ */
+public class PNGData extends PNGChunk
+{
+  private int offset;
+
+  protected PNGData( int type, byte[] data, int crc )
+  {
+    super( type, data, crc );
+  }
+
+  protected PNGData( int chunkSize )
+  {
+    super( PNGChunk.TYPE_DATA );
+    data = new byte[ chunkSize ];
+    offset = 0;
+  }
+
+  /**
+   * Deflates the available data in def to the chunk.
+   *
+   * @return true if the chunk is filled and no more data can be written,
+   * false otherwise.
+   */
+  public void deflateToChunk( Deflater def )
+  {
+    offset += def.deflate( data, offset, data.length - offset );
+  }
+
+  /**
+   * Returns true if the chunk is filled.
+   */
+  public boolean chunkFull()
+  {
+    return (offset >= data.length);
+  }
+
+  /**
+   * Shrink the chunk to offset size, used for the last chunk in a stream
+   * (no trailing data!)
+   */
+  public void shrink()
+  {
+    byte[] newData = new byte[ offset ];
+    System.arraycopy( data, 0, newData, 0, offset );
+    data = newData;
+  }
+
+  /**
+   * Feeds the data in the chunk to a ZIP inflater object.
+   */
+  public void feedToInflater( Inflater inf )
+  {
+    inf.setInput( data );
+  }
+
+  public String toString()
+  {
+    return "PNG Data chunk. Length = "+data.length;
+  }
+}