itextpdf-master/itext/src/main/java/com/itextpdf/text/pdf/PdfShadingPattern.java
/*
 *
 * This file is part of the iText (R) project.
    Copyright (c) 1998-2022 iText Group NV
 * Authors: Bruno Lowagie, Paulo Soares, et al.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License version 3
 * as published by the Free Software Foundation with the addition of the
 * following permission added to Section 15 as permitted in Section 7(a):
 * FOR ANY PART OF THE COVERED WORK IN WHICH THE COPYRIGHT IS OWNED BY
 * ITEXT GROUP. ITEXT GROUP DISCLAIMS THE WARRANTY OF NON INFRINGEMENT
 * OF THIRD PARTY RIGHTS
 *
 * This program 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 Affero General Public License for more details.
 * You should have received a copy of the GNU Affero General Public License
 * along with this program; if not, see http://www.gnu.org/licenses or write to
 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 * Boston, MA, 02110-1301 USA, or download the license from the following URL:
 * http://itextpdf.com/terms-of-use/
 *
 * The interactive user interfaces in modified source and object code versions
 * of this program must display Appropriate Legal Notices, as required under
 * Section 5 of the GNU Affero General Public License.
 *
 * In accordance with Section 7(b) of the GNU Affero General Public License,
 * a covered work must retain the producer line in every PDF that is created
 * or manipulated using iText.
 *
 * You can be released from the requirements of the license by purchasing
 * a commercial license. Buying such a license is mandatory as soon as you
 * develop commercial activities involving the iText software without
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 */
package com.itextpdf.text.pdf;

import java.io.IOException;
import com.itextpdf.text.error_messages.MessageLocalization;
/** Implements the shading pattern dictionary.
 *
 * @author Paulo Soares
 */
public class PdfShadingPattern extends PdfDictionary {

    protected PdfShading shading;
    
    protected PdfWriter writer;
    
    protected float matrix[] = {1, 0, 0, 1, 0, 0};
    
    protected PdfName patternName;

    protected PdfIndirectReference patternReference;

    /** Creates new PdfShadingPattern */
    public PdfShadingPattern(PdfShading shading) {
        writer = shading.getWriter();
        put(PdfName.PATTERNTYPE, new PdfNumber(2));
        this.shading = shading;
    }
        
    PdfName getPatternName() {
        return patternName;
    }

    PdfName getShadingName() {
        return shading.getShadingName();
    }
    
    PdfIndirectReference getPatternReference() {
        if (patternReference == null)
            patternReference = writer.getPdfIndirectReference();
        return patternReference;
    }
    
    PdfIndirectReference getShadingReference() {
        return shading.getShadingReference();
    }
    
    void setName(int number) {
        patternName = new PdfName("P" + number);
    }
    
    public void addToBody() throws IOException {
        put(PdfName.SHADING, getShadingReference());
        put(PdfName.MATRIX, new PdfArray(matrix));
        writer.addToBody(this, getPatternReference());
    }
    
    public void setMatrix(float matrix[]) {
        if (matrix.length != 6)
            throw new RuntimeException(MessageLocalization.getComposedMessage("the.matrix.size.must.be.6"));
        this.matrix = matrix;
    }
    
    public float[] getMatrix() {
        return matrix;
    }
    
    public PdfShading getShading() {
        return shading;
    }
    
    ColorDetails getColorDetails() {
        return shading.getColorDetails();
    }

}
