From 6025b6016517c6d898d8957d1d7e03ba71431912 Mon Sep 17 00:00:00 2001
From: tknall <tknall@7b5415b0-85f9-ee4d-85bd-d5d0c3b42d1c>
Date: Fri, 1 Dec 2006 12:20:24 +0000
Subject: Initial import of release 2.2.

git-svn-id: https://joinup.ec.europa.eu/svn/pdf-as/trunk@4 7b5415b0-85f9-ee4d-85bd-d5d0c3b42d1c
---
 .../pdfbox/pdmodel/graphics/color/PDIndexed.java   | 271 +++++++++++++++++++++
 1 file changed, 271 insertions(+)
 create mode 100644 src/main/java/org/pdfbox/pdmodel/graphics/color/PDIndexed.java

(limited to 'src/main/java/org/pdfbox/pdmodel/graphics/color/PDIndexed.java')

diff --git a/src/main/java/org/pdfbox/pdmodel/graphics/color/PDIndexed.java b/src/main/java/org/pdfbox/pdmodel/graphics/color/PDIndexed.java
new file mode 100644
index 0000000..cd1d9e7
--- /dev/null
+++ b/src/main/java/org/pdfbox/pdmodel/graphics/color/PDIndexed.java
@@ -0,0 +1,271 @@
+/**
+ * Copyright (c) 2004, www.pdfbox.org
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. Neither the name of pdfbox; nor the names of its
+ *    contributors may be used to endorse or promote products derived from this
+ *    software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * http://www.pdfbox.org
+ *
+ */
+package org.pdfbox.pdmodel.graphics.color;
+
+import org.pdfbox.cos.COSArray;
+import org.pdfbox.cos.COSBase;
+import org.pdfbox.cos.COSInteger;
+import org.pdfbox.cos.COSName;
+import org.pdfbox.cos.COSNumber;
+import org.pdfbox.cos.COSStream;
+import org.pdfbox.cos.COSString;
+
+import java.awt.color.ColorSpace;
+import java.awt.image.ColorModel;
+import java.awt.image.IndexColorModel;
+
+import java.io.InputStream;
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+
+/**
+ * This class represents an Indexed color space.
+ *
+ * @author Ben Litchfield (ben@csh.rit.edu)
+ * @version $Revision: 1.3 $
+ */
+public class PDIndexed extends PDColorSpace
+{
+
+    /**
+     * The name of this color space.
+     */
+    public static final String NAME = "Indexed";
+
+    /**
+     * The abbreviated name of this color space.
+     */
+    public static final String ABBREVIATED_NAME = "I";
+
+    private COSArray array;
+
+    /**
+     * Constructor, default DeviceRGB, hival 255.
+     */
+    public PDIndexed()
+    {
+        array = new COSArray();
+        array.add( COSName.getPDFName( NAME ) );
+        array.add( COSName.getPDFName( PDDeviceRGB.NAME ) );
+        array.add( new COSInteger( 255 ) );
+        array.add( org.pdfbox.cos.COSNull.NULL );
+    }
+
+    /**
+     * Constructor.
+     *
+     * @param indexedArray The array containing the indexed parameters
+     */
+    public PDIndexed( COSArray indexedArray )
+    {
+        array = indexedArray;
+    }
+
+    /**
+     * This will return the number of color components.  This will return the
+     * number of color components in the base color.
+     *
+     * @return The number of components in this color space.
+     *
+     * @throws IOException If there is an error getting the number of color components.
+     */
+    public int getNumberOfComponents() throws IOException
+    {
+        return getBaseColorSpace().getNumberOfComponents();
+    }
+
+    /**
+     * This will return the name of the color space.
+     *
+     * @return The name of the color space.
+     */
+    public String getName()
+    {
+        return NAME;
+    }
+
+    /**
+     * Create a Java colorspace for this colorspace.
+     *
+     * @return A color space that can be used for Java AWT operations.
+     *
+     * @throws IOException If there is an error creating the color space.
+     */
+    public ColorSpace createColorSpace() throws IOException
+    {
+        throw new IOException( "Not implemented" );
+    }
+    
+    /**
+     * Create a Java color model for this colorspace.
+     *
+     * @param bpc The number of bits per component.
+     *
+     * @return A color model that can be used for Java AWT operations.
+     *
+     * @throws IOException If there is an error creating the color model.
+     */
+    public ColorModel createColorModel( int bpc ) throws IOException
+    {
+        int size = getHighValue();
+        byte[] index = getLookupData();
+        //for (int i=0;i<index.length;i++) System.out.print(index[i]+" ");
+        
+        ColorModel cm = new IndexColorModel(bpc, size+1, index,0,false);
+        return cm;
+    }
+
+    /**
+     * This will get the color space that acts as the index for this color space.
+     *
+     * @return The base color space.
+     *
+     * @throws IOException If there is error creating the base color space.
+     */
+    public PDColorSpace getBaseColorSpace() throws IOException
+    {
+        PDColorSpace retval = null;
+        COSBase base = array.getObject( 1 );
+        if( base instanceof COSName )
+        {
+            retval = PDColorSpaceFactory.createColorSpace( (COSName)base );
+        }
+        else
+        {
+            throw new IOException( "Error:unknown base colorspace" );
+        }
+
+        return retval;
+    }
+
+    /**
+     * This will set the base color space.
+     *
+     * @param base The base color space to use as the index.
+     */
+    public void setBaseColorSpace( PDColorSpace base )
+    {
+        array.set( 1, base.getCOSObject() );
+    }
+
+    /**
+     * Get the highest value for the lookup.
+     *
+     * @return The hival entry.
+     */
+    public int getHighValue()
+    {
+        return ((COSNumber)array.getObject( 2 )).intValue();
+    }
+
+    /**
+     * This will set the highest value that is allowed.  This cannot be higher
+     * than 255.
+     *
+     * @param high The highest value for the lookup table.
+     */
+    public void setHighValue( int high )
+    {
+        array.set( 2, new COSInteger( high ) );
+    }
+
+    /**
+     * This will perform a lookup into the color lookup table.
+     *
+     * @param componentNumber The component number, probably 1,2,3,3.
+     * @param lookupIndex The zero-based index into the table, should not exceed the high value.
+     *
+     * @return The value that was from the lookup table.
+     *
+     * @throws IOException If there is an error looking up the color.
+     */
+    public int lookupColor( int componentNumber, int lookupIndex ) throws IOException
+    {
+        COSBase lookupTable = array.getObject( 3 );
+        PDColorSpace baseColor = getBaseColorSpace();
+        byte[] data = getLookupData();
+        int numberOfComponents = baseColor.getNumberOfComponents();
+        return (data[componentNumber*numberOfComponents + lookupIndex]+256)%256;
+    }
+
+    private byte[] getLookupData() throws IOException
+    {
+        COSBase lookupTable = array.getObject( 3 );
+        byte[] data = null;
+        if( lookupTable instanceof COSString )
+        {
+            data = ((COSString)lookupTable).getBytes();
+        }
+        else if( lookupTable instanceof COSStream )
+        {
+            //Data will be small so just load the whole thing into memory for
+            //easier processing
+            COSStream lookupStream = (COSStream)lookupTable;
+            InputStream input = lookupStream.getUnfilteredStream();
+            ByteArrayOutputStream output = new ByteArrayOutputStream(1024);
+            byte[] buffer = new byte[ 1024 ];
+            int amountRead;
+            while( (amountRead = input.read(buffer, 0, buffer.length)) != -1 )
+            {
+                output.write( buffer, 0, amountRead );
+            }
+            data = output.toByteArray();
+        }
+        else if( lookupTable == null )
+        {
+            data = new byte[0];
+        }
+        else
+        {
+            throw new IOException( "Error: Unknown type for lookup table " + lookupTable );
+        }
+        return data;
+    }
+
+    /**
+     * This will set a color in the color lookup table.
+     *
+     * @param componentNumber The component number, probably 1,2,3,3.
+     * @param lookupIndex The zero-based index into the table, should not exceed the high value.
+     * @param color The color that will go into the table.
+     *
+     * @throws IOException If there is an error looking up the color.
+     */
+    public void setLookupColor( int componentNumber, int lookupIndex, int color ) throws IOException
+    {
+        PDColorSpace baseColor = getBaseColorSpace();
+        int numberOfComponents = baseColor.getNumberOfComponents();
+        byte[] data = getLookupData();
+        data[componentNumber*numberOfComponents + lookupIndex] = (byte)color;
+        COSString string = new COSString( data );
+        array.set( 3, string );
+    }
+}
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