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The Apache Commons Codec package contains simple encoder and decoders for various formats such as Base64 and Hexadecimal. In addition to these widely used encoders and decoders, the codec package also maintains a collection of phonetic encoding utilities.

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/* ====================================================================
   Licensed to the Apache Software Foundation (ASF) under one or more
   contributor license agreements.  See the NOTICE file distributed with
   this work for additional information regarding copyright ownership.
   The ASF licenses this file to You under the Apache License, Version 2.0
   (the "License"); you may not use this file except in compliance with
   the License.  You may obtain a copy of the License at

       http://www.apache.org/licenses/LICENSE-2.0

   Unless required by applicable law or agreed to in writing, software
   distributed under the License is distributed on an "AS IS" BASIS,
   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   See the License for the specific language governing permissions and
   limitations under the License.
==================================================================== */

package org.apache.poi.sl.draw;

import static org.apache.poi.sl.draw.DrawPaint.fillPaintWorkaround;

import java.awt.Dimension;
import java.awt.Graphics2D;
import java.awt.Paint;
import java.awt.geom.Rectangle2D;

import org.apache.poi.sl.usermodel.Background;
import org.apache.poi.sl.usermodel.PlaceableShape;
import org.apache.poi.sl.usermodel.ShapeContainer;
import org.apache.poi.sl.usermodel.Sheet;


public class DrawBackground extends DrawShape {
    public DrawBackground(Background shape) {
        super(shape);
    }

    @SuppressWarnings("rawtypes")
    public void draw(Graphics2D graphics) {
        Dimension pg = shape.getSheet().getSlideShow().getPageSize();
        final Rectangle2D anchor = new Rectangle2D.Double(0, 0, pg.getWidth(), pg.getHeight());

        PlaceableShape ps = new PlaceableShape(){
            public ShapeContainer getParent() { return null; }
            public Rectangle2D getAnchor() { return anchor; }
            public void setAnchor(Rectangle2D newAnchor) {}
            public double getRotation() { return 0; }
            public void setRotation(double theta) {}
            public void setFlipHorizontal(boolean flip) {}
            public void setFlipVertical(boolean flip) {}
            public boolean getFlipHorizontal() { return false; }
            public boolean getFlipVertical() { return false; }
            public Sheet getSheet() { return shape.getSheet(); }
        };
        
        DrawFactory drawFact = DrawFactory.getInstance(graphics);
        DrawPaint dp = drawFact.getPaint(ps);
        Paint fill = dp.getPaint(graphics, getShape().getFillStyle().getPaint());
        Rectangle2D anchor2 = getAnchor(graphics, anchor);
        
        if(fill != null) {
            graphics.setRenderingHint(Drawable.GRADIENT_SHAPE, anchor);
            graphics.setPaint(fill);
            fillPaintWorkaround(graphics, anchor2);
        }
    }

    protected Background getShape() {
        return (Background)shape;
    }
}