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The Apache PDFBox library is an open source Java tool for working with PDF documents.

There is a newer version: 3.0.2

/*
 * 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.pdfbox.util.operator;

import java.util.List;

import org.apache.pdfbox.cos.COSBase;
import org.apache.pdfbox.cos.COSNumber;
import org.apache.pdfbox.util.Matrix;
import org.apache.pdfbox.util.PDFOperator;

/**
 * @author Huault : [email protected]
 * @version $Revision: 1.4 $
 */

public class SetMatrix extends OperatorProcessor
{

    /**
     * Tm Set text matrix and text line matrix.
     * @param operator The operator that is being executed.
     * @param arguments List
     */
    public void process(PDFOperator operator, List arguments)
    {
        //Set text matrix and text line matrix
        COSNumber a = (COSNumber)arguments.get( 0 );
        COSNumber b = (COSNumber)arguments.get( 1 );
        COSNumber c = (COSNumber)arguments.get( 2 );
        COSNumber d = (COSNumber)arguments.get( 3 );
        COSNumber e = (COSNumber)arguments.get( 4 );
        COSNumber f = (COSNumber)arguments.get( 5 );

        Matrix textMatrix = new Matrix();
        textMatrix.setValue( 0, 0, a.floatValue() );
        textMatrix.setValue( 0, 1, b.floatValue() );
        textMatrix.setValue( 1, 0, c.floatValue() );
        textMatrix.setValue( 1, 1, d.floatValue() );
        textMatrix.setValue( 2, 0, e.floatValue() );
        textMatrix.setValue( 2, 1, f.floatValue() );
        context.setTextMatrix( textMatrix );
        context.setTextLineMatrix( textMatrix.copy() );
    }
}