obtained gcc-4.6.4.tar.bz2 from upstream website;upstream

verified gcc-4.6.4.tar.bz2.sig;
imported gcc-4.6.4 source tree from verified upstream tarball.

downloading a git-generated archive based on the 'upstream' tag
should provide you with a source tree that is binary identical
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if you have obtained the source via the command 'git clone',
however, do note that line-endings of files in your working
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1 files changed, 233 insertions, 0 deletions

diff --git a/libjava/classpath/gnu/javax/imageio/png/PNGEncoder.java b/libjava/classpath/gnu/javax/imageio/png/PNGEncoder.java
new file mode 100644
index 000000000..b31787635
--- /dev/null
+++ b/libjava/classpath/gnu/javax/imageio/png/PNGEncoder.java
@@ -0,0 +1,233 @@
+/* PNGEncoder.java --
+   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.Vector;
+import java.util.zip.Deflater;
+import java.awt.color.ColorSpace;
+import java.awt.color.ICC_ColorSpace;
+import java.awt.image.BufferedImage;
+import java.awt.image.ColorModel;
+import java.awt.image.DataBuffer;
+import java.awt.image.DataBufferByte;
+import java.awt.image.DataBufferUShort;
+import java.awt.image.IndexColorModel;
+import java.awt.image.WritableRaster;
+
+public class PNGEncoder
+{
+  /**
+   * The default data chunk size. 8 kb.
+   */
+  private static final int defaultChunkSize = 8192;
+
+  private PNGHeader header;
+  private PNGPalette palette;
+  private int stride, bpp;
+  private byte[] rawData;
+  private PNGICCProfile profile;
+
+  public PNGEncoder( BufferedImage bi ) throws PNGException
+  {
+    ColorModel c = bi.getColorModel();
+    int width = bi.getWidth();
+    int height = bi.getHeight();
+    int depth = 0;
+    int colorType;
+    boolean interlace = false;
+
+    if( c instanceof IndexColorModel )
+      {
+        colorType = PNGHeader.INDEXED;
+        int n = ((IndexColorModel)c).getMapSize();
+        if( n <= 2 )
+          depth = 1;
+        else if( n <= 4 )
+          depth = 2;
+        else if( n <= 16 )
+          depth = 4;
+        else if( n <= 256 )
+          depth = 8;
+        else
+          throw new PNGException("Depth must be <= 8 bits for indexed color.");
+        palette = new PNGPalette( ((IndexColorModel)c) );
+      }
+    else
+      {
+        ColorSpace cs = c.getColorSpace();
+        ColorSpace grayCS = ColorSpace.getInstance( ColorSpace.CS_GRAY );
+        if( cs == grayCS || bi.getType() == BufferedImage.TYPE_BYTE_GRAY
+            || bi.getType() == BufferedImage.TYPE_USHORT_GRAY )
+          colorType = c.hasAlpha() ? PNGHeader.GRAYSCALE_WITH_ALPHA :
+            PNGHeader.GRAYSCALE;
+        else
+          colorType = c.hasAlpha() ? PNGHeader.RGB_WITH_ALPHA : PNGHeader.RGB;
+        // Figure out the depth
+        int[] bits = c.getComponentSize();
+        depth = bits[0];
+        for(int i = 1; i < bits.length; i++ )
+          if( bits[i] > depth ) depth = bits[i];
+        if( (cs != grayCS && !cs.isCS_sRGB()) && cs instanceof ICC_ColorSpace )
+          profile = new PNGICCProfile( ((ICC_ColorSpace)cs).getProfile() );
+      }
+
+    header = new PNGHeader(width, height, depth, colorType, interlace);
+
+    stride = header.getScanlineStride(); // scanline stride
+    bpp = header.bytesPerPixel(); // bytes per pixel
+    getRawData( bi );
+  }
+
+  /**
+   * Returns the generated header.
+   */
+  public PNGHeader getHeader()
+  {
+    return header;
+  }
+
+  /**
+   * Returns the generated palette.
+   */
+  public PNGPalette getPalette()
+  {
+    return palette;
+  }
+
+  /**
+   * Returns the associated ICC profile, if any.
+   */
+  public PNGICCProfile getProfile()
+  {
+    return profile;
+  }
+
+  /**
+   * Encodes the raster and returns a Vector of PNGData chunks.
+   */
+  public Vector encodeImage()
+  {
+    Deflater deflater = new Deflater(); // The deflater
+    boolean useFilter = PNGFilter.useFilter( header );
+    byte[] lastScanline = new byte[ stride ];
+
+    byte[] data = new byte[ rawData.length + header.getHeight() ];
+
+    byte filterByte = PNGFilter.FILTER_NONE;
+    for( int i = 0; i < header.getHeight(); i++)
+      {
+        byte[] scanline = new byte[ stride ];
+        System.arraycopy(rawData, (i * stride), scanline, 0, stride);
+        if( useFilter && i > 0)
+          filterByte = PNGFilter.chooseFilter( scanline, lastScanline, bpp);
+
+        byte[] filtered = PNGFilter.filterScanline( filterByte, scanline,
+                                                    lastScanline, bpp );
+        data[i * (stride + 1)] = filterByte;
+        System.arraycopy(filtered, 0, data, 1 + (i * (stride + 1)), stride);
+
+        lastScanline = scanline;
+      }
+
+    deflater.setInput( data );
+    deflater.finish();
+
+    PNGData chunk;
+    Vector chunks = new Vector();
+    do
+      {
+        chunk = new PNGData( defaultChunkSize );
+        chunk.deflateToChunk( deflater );
+        chunks.add( chunk );
+      }
+    while( chunk.chunkFull() );
+    chunk.shrink(); // Shrink the last chunk.
+    return chunks;
+  }
+
+  /**
+   * Get the image's raw data.
+   * FIXME: This may need improving on.
+   */
+  private void getRawData( BufferedImage bi ) throws PNGException
+  {
+    WritableRaster raster = bi.getRaster();
+    rawData = new byte[ stride * header.getHeight() ];
+    if( header.isIndexed() )
+      {
+        DataBuffer db = raster.getDataBuffer();
+        if( !( db instanceof DataBufferByte ) )
+          throw new PNGException("Unexpected DataBuffer for an IndexColorModel.");
+        byte[] data = ((DataBufferByte)db).getData();
+        for(int i = 0; i < header.getHeight(); i++ )
+          System.arraycopy( data, i * stride, rawData, i * stride, stride );
+        return;
+      }
+
+    if( header.getDepth() == 16 )
+      {
+        DataBuffer db = raster.getDataBuffer();
+        if( !( db instanceof DataBufferUShort ) )
+          throw new PNGException("Unexpected DataBuffer for 16-bit.");
+        short[] data = ((DataBufferUShort)db).getData();
+        for(int i = 0; i < header.getHeight(); i++ )
+          for(int j = 0; j < ( stride >> 1); j++)
+            {
+              rawData[ j * 2 + i * stride ] = (byte)((data[j + i * (stride >> 1 )] & 0xFF00) >> 8);
+              rawData[ j * 2 + i * stride + 1 ] = (byte)(data[j + i * (stride >> 1 )] & 0xFF);
+            }
+        return;
+      }
+
+    int size = ( header.getColorType() == PNGHeader.RGB_WITH_ALPHA ) ? 4 : 3;
+    int width = header.getWidth();
+    int height = header.getHeight();
+    int[] pixels = bi.getRGB( 0, 0, width, height, null, 0, width );
+
+    for( int i = 0; i < width * height; i++ )
+      {
+        rawData[ i * size ] = (byte)((pixels[i] & 0xFF0000) >> 16);
+        rawData[ i * size + 1 ] = (byte)((pixels[i] & 0xFF00) >> 8);
+        rawData[ i * size + 2 ] = (byte)(pixels[i] & 0xFF);
+      }
+
+    if( size == 4 )
+      for( int i = 0; i < width * height; i++ )
+        rawData[ i * size + 3 ] = (byte)((pixels[i] & 0xFF000000) >> 24);
+  }
+}