# SetMatrix.java

    /*
     * 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.contentstream.operator.state;

    import java.util.List;

    import org.apache.pdfbox.contentstream.operator.MissingOperandException;
    import org.apache.pdfbox.contentstream.operator.Operator;
    import org.apache.pdfbox.contentstream.operator.OperatorName;
    import org.apache.pdfbox.contentstream.operator.OperatorProcessor;
    import org.apache.pdfbox.cos.COSBase;
    import org.apache.pdfbox.cos.COSNumber;
    import org.apache.pdfbox.util.Matrix;

    /**
     * Tm: Set text matrix and text line matrix.
     *
     * @author Laurent Huault
     */
    public class SetMatrix extends OperatorProcessor
    {
        @Override
        public void process(Operator operator, List<COSBase> arguments) throws MissingOperandException
        {
            if (arguments.size() < 6)
            {
                throw new MissingOperandException(operator, arguments);
            }
            if (!checkArrayTypesClass(arguments, COSNumber.class))
            {
                return;
            }

            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 matrix = new Matrix(a.floatValue(), b.floatValue(), c.floatValue(),
                                       d.floatValue(), e.floatValue(), f.floatValue());

            context.setTextMatrix(matrix);
            context.setTextLineMatrix(matrix.clone());
        }

        @Override
        public String getName()
        {
            return OperatorName.SET_MATRIX;
        }
    }